mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-12 09:58:36 +00:00
Code Issues Releases Activity
e6895e8049
freebsd/contrib/gcc/flow.c

4782 lines
141 KiB
C
Raw Normal View History

Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Data flow analysis for GNU compiler.
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #3
2001-02-17 08:34:50 +00:00
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation,
Inc.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
This file is part of GCC.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
You should have received a copy of the GNU General Public License
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
along with GCC; see the file COPYING. If not, write to the Free
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* This file contains the data flow analysis pass of the compiler. It
computes data flow information which tells combine_instructions
which insns to consider combining and controls register allocation.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Additional data flow information that is too bulky to record is
generated during the analysis, and is used at that time to create
autoincrement and autodecrement addressing.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
The first step is dividing the function into basic blocks.
find_basic_blocks does this. Then life_analysis determines
where each register is live and where it is dead.
** find_basic_blocks **
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
find_basic_blocks divides the current function's rtl into basic
blocks and constructs the CFG. The blocks are recorded in the
basic_block_info array; the CFG exists in the edge structures
referenced by the blocks.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
find_basic_blocks also finds any unreachable loops and deletes them.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
** life_analysis **
life_analysis is called immediately after find_basic_blocks.
It uses the basic block information to determine where each
hard or pseudo register is live.
** live-register info **
The information about where each register is live is in two parts:
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
the REG_NOTES of insns, and the vector basic_block->global_live_at_start.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
basic_block->global_live_at_start has an element for each basic
block, and the element is a bit-vector with a bit for each hard or
pseudo register. The bit is 1 if the register is live at the
beginning of the basic block.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Two types of elements can be added to an insn's REG_NOTES.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
A REG_DEAD note is added to an insn's REG_NOTES for any register
that meets both of two conditions: The value in the register is not
needed in subsequent insns and the insn does not replace the value in
the register (in the case of multi-word hard registers, the value in
each register must be replaced by the insn to avoid a REG_DEAD note).
In the vast majority of cases, an object in a REG_DEAD note will be
used somewhere in the insn. The (rare) exception to this is if an
insn uses a multi-word hard register and only some of the registers are
needed in subsequent insns. In that case, REG_DEAD notes will be
provided for those hard registers that are not subsequently needed.
Partial REG_DEAD notes of this type do not occur when an insn sets
only some of the hard registers used in such a multi-word operand;
omitting REG_DEAD notes for objects stored in an insn is optional and
the desire to do so does not justify the complexity of the partial
REG_DEAD notes.
REG_UNUSED notes are added for each register that is set by the insn
but is unused subsequently (if every register set by the insn is unused
and the insn does not reference memory or have some other side-effect,
the insn is deleted instead). If only part of a multi-word hard
register is used in a subsequent insn, REG_UNUSED notes are made for
the parts that will not be used.
To determine which registers are live after any insn, one can
start from the beginning of the basic block and scan insns, noting
which registers are set by each insn and which die there.
** Other actions of life_analysis **
life_analysis sets up the LOG_LINKS fields of insns because the
information needed to do so is readily available.
life_analysis deletes insns whose only effect is to store a value
that is never used.
life_analysis notices cases where a reference to a register as
a memory address can be combined with a preceding or following
incrementation or decrementation of the register. The separate
instruction to increment or decrement is deleted and the address
is changed to a POST_INC or similar rtx.
Each time an incrementing or decrementing address is created,
a REG_INC element is added to the insn's REG_NOTES list.
life_analysis fills in certain vectors containing information about
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
register usage: REG_N_REFS, REG_N_DEATHS, REG_N_SETS, REG_LIVE_LENGTH,
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
REG_N_CALLS_CROSSED, REG_N_THROWING_CALLS_CROSSED and REG_BASIC_BLOCK.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
life_analysis sets current_function_sp_is_unchanging if the function
doesn't modify the stack pointer. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* TODO:
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Split out from life_analysis:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
- local property discovery
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
- global property computation
- log links creation
- pre/post modify transformation
*/
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "config.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "system.h"
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
#include "coretypes.h"
#include "tm.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "tree.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "rtl.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "tm_p.h"
#include "hard-reg-set.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "basic-block.h"
#include "insn-config.h"
#include "regs.h"
#include "flags.h"
#include "output.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "function.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "except.h"
#include "toplev.h"
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#include "recog.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "expr.h"
#include "timevar.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "obstack.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "splay-tree.h"
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#include "tree-pass.h"
#include "params.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifndef HAVE_epilogue
#define HAVE_epilogue 0
#endif
#ifndef HAVE_prologue
#define HAVE_prologue 0
#endif
#ifndef HAVE_sibcall_epilogue
#define HAVE_sibcall_epilogue 0
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifndef EPILOGUE_USES
#define EPILOGUE_USES(REGNO) 0
#endif
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
#ifndef EH_USES
#define EH_USES(REGNO) 0
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
#ifndef REVERSE_CONDEXEC_PREDICATES_P
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#define REVERSE_CONDEXEC_PREDICATES_P(x, y) \
(GET_CODE ((x)) == reversed_comparison_code ((y), NULL))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* This is the maximum number of times we process any given block if the
latest loop depth count is smaller than this number. Only used for the
failure strategy to avoid infinite loops in calculate_global_regs_live. */
#define MAX_LIVENESS_ROUNDS 20
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Nonzero if the second flow pass has completed. */
int flow2_completed;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Maximum register number used in this function, plus one. */
int max_regno;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Indexed by n, giving various register information */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
VEC(reg_info_p,heap) *reg_n_info;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Regset of regs live when calls to `setjmp'-like functions happen. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* ??? Does this exist only for the setjmp-clobbered warning message? */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static regset regs_live_at_setjmp;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* List made of EXPR_LIST rtx's which gives pairs of pseudo registers
that have to go in the same hard reg.
The first two regs in the list are a pair, and the next two
are another pair, etc. */
rtx regs_may_share;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Set of registers that may be eliminable. These are handled specially
in updating regs_ever_live. */
static HARD_REG_SET elim_reg_set;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Holds information for tracking conditional register life information. */
struct reg_cond_life_info
{
/* A boolean expression of conditions under which a register is dead. */
rtx condition;
/* Conditions under which a register is dead at the basic block end. */
rtx orig_condition;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A boolean expression of conditions under which a register has been
stored into. */
rtx stores;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* ??? Could store mask of bytes that are dead, so that we could finally
track lifetimes of multi-word registers accessed via subregs. */
};
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* For use in communicating between propagate_block and its subroutines.
Holds all information needed to compute life and def-use information. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct propagate_block_info
{
/* The basic block we're considering. */
basic_block bb;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Bit N is set if register N is conditionally or unconditionally live. */
regset reg_live;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Bit N is set if register N is set this insn. */
regset new_set;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Element N is the next insn that uses (hard or pseudo) register N
within the current basic block; or zero, if there is no such insn. */
rtx *reg_next_use;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Contains a list of all the MEMs we are tracking for dead store
elimination. */
rtx mem_set_list;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If non-null, record the set of registers set unconditionally in the
basic block. */
regset local_set;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If non-null, record the set of registers set conditionally in the
basic block. */
regset cond_local_set;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
/* Indexed by register number, holds a reg_cond_life_info for each
register that is not unconditionally live or dead. */
splay_tree reg_cond_dead;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Bit N is set if register N is in an expression in reg_cond_dead. */
regset reg_cond_reg;
#endif
/* The length of mem_set_list. */
int mem_set_list_len;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Nonzero if the value of CC0 is live. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int cc0_live;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Flags controlling the set of information propagate_block collects. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int flags;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Index of instruction being processed. */
int insn_num;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
};
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Number of dead insns removed. */
static int ndead;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* When PROP_REG_INFO set, array contains pbi->insn_num of instruction
where given register died. When the register is marked alive, we use the
information to compute amount of instructions life range cross.
(remember, we are walking backward). This can be computed as current
pbi->insn_num - reg_deaths[regno].
At the end of processing each basic block, the remaining live registers
are inspected and live ranges are increased same way so liverange of global
registers are computed correctly.
The array is maintained clear for dead registers, so it can be safely reused
for next basic block without expensive memset of the whole array after
reseting pbi->insn_num to 0. */
static int *reg_deaths;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Forward declarations */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static int verify_wide_reg_1 (rtx *, void *);
static void verify_wide_reg (int, basic_block);
static void verify_local_live_at_start (regset, basic_block);
static void notice_stack_pointer_modification_1 (rtx, rtx, void *);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static void notice_stack_pointer_modification (void);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static void mark_reg (rtx, void *);
static void mark_regs_live_at_end (regset);
static void calculate_global_regs_live (sbitmap, sbitmap, int);
static void propagate_block_delete_insn (rtx);
static rtx propagate_block_delete_libcall (rtx, rtx);
static int insn_dead_p (struct propagate_block_info *, rtx, int, rtx);
static int libcall_dead_p (struct propagate_block_info *, rtx, rtx);
static void mark_set_regs (struct propagate_block_info *, rtx, rtx);
static void mark_set_1 (struct propagate_block_info *, enum rtx_code, rtx,
rtx, rtx, int);
static int find_regno_partial (rtx *, void *);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static int mark_regno_cond_dead (struct propagate_block_info *, int, rtx);
static void free_reg_cond_life_info (splay_tree_value);
static int flush_reg_cond_reg_1 (splay_tree_node, void *);
static void flush_reg_cond_reg (struct propagate_block_info *, int);
static rtx elim_reg_cond (rtx, unsigned int);
static rtx ior_reg_cond (rtx, rtx, int);
static rtx not_reg_cond (rtx);
static rtx and_reg_cond (rtx, rtx, int);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#ifdef AUTO_INC_DEC
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static void attempt_auto_inc (struct propagate_block_info *, rtx, rtx, rtx,
rtx, rtx);
static void find_auto_inc (struct propagate_block_info *, rtx, rtx);
static int try_pre_increment_1 (struct propagate_block_info *, rtx);
static int try_pre_increment (rtx, rtx, HOST_WIDE_INT);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#endif
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static void mark_used_reg (struct propagate_block_info *, rtx, rtx, rtx);
static void mark_used_regs (struct propagate_block_info *, rtx, rtx, rtx);
void debug_flow_info (void);
static void add_to_mem_set_list (struct propagate_block_info *, rtx);
static int invalidate_mems_from_autoinc (rtx *, void *);
static void invalidate_mems_from_set (struct propagate_block_info *, rtx);
static void clear_log_links (sbitmap);
static int count_or_remove_death_notes_bb (basic_block, int);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static void allocate_bb_life_data (void);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return the INSN immediately following the NOTE_INSN_BASIC_BLOCK
note associated with the BLOCK. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
first_insn_after_basic_block_note (basic_block block)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx insn;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Get the first instruction in the block. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
insn = BB_HEAD (block);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (insn == NULL_RTX)
return NULL_RTX;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (LABEL_P (insn))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
insn = NEXT_INSN (insn);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (NOTE_INSN_BASIC_BLOCK_P (insn));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return NEXT_INSN (insn);
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Perform data flow analysis for the whole control flow graph.
FLAGS is a set of PROP_* flags to be used in accumulating flow info. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
void
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
life_analysis (int flags)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
#ifdef ELIMINABLE_REGS
int i;
static const struct {const int from, to; } eliminables[] = ELIMINABLE_REGS;
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Record which registers will be eliminated. We use this in
mark_used_regs. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
CLEAR_HARD_REG_SET (elim_reg_set);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef ELIMINABLE_REGS
for (i = 0; i < (int) ARRAY_SIZE (eliminables); i++)
SET_HARD_REG_BIT (elim_reg_set, eliminables[i].from);
#else
SET_HARD_REG_BIT (elim_reg_set, FRAME_POINTER_REGNUM);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#endif
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#ifdef CANNOT_CHANGE_MODE_CLASS
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (flags & PROP_REG_INFO)
Gcc 3.4.4 release.
2005-06-03 03:28:44 +00:00
init_subregs_of_mode ();
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! optimize)
flags &= ~(PROP_LOG_LINKS | PROP_AUTOINC | PROP_ALLOW_CFG_CHANGES);
/* The post-reload life analysis have (on a global basis) the same
registers live as was computed by reload itself. elimination
Otherwise offsets and such may be incorrect.
Reload will make some registers as live even though they do not
appear in the rtl.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
We don't want to create new auto-incs after reload, since they
are unlikely to be useful and can cause problems with shared
stack slots. */
if (reload_completed)
flags &= ~(PROP_REG_INFO | PROP_AUTOINC);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We want alias analysis information for local dead store elimination. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (optimize && (flags & PROP_SCAN_DEAD_STORES))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
init_alias_analysis ();
/* Always remove no-op moves. Do this before other processing so
that we don't have to keep re-scanning them. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
delete_noop_moves ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Some targets can emit simpler epilogues if they know that sp was
not ever modified during the function. After reload, of course,
we've already emitted the epilogue so there's no sense searching. */
if (! reload_completed)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
notice_stack_pointer_modification ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Allocate and zero out data structures that will record the
data from lifetime analysis. */
allocate_reg_life_data ();
allocate_bb_life_data ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Find the set of registers live on function exit. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
mark_regs_live_at_end (EXIT_BLOCK_PTR->il.rtl->global_live_at_start);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* "Update" life info from zero. It'd be nice to begin the
relaxation with just the exit and noreturn blocks, but that set
is not immediately handy. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (flags & PROP_REG_INFO)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
{
memset (regs_ever_live, 0, sizeof (regs_ever_live));
memset (regs_asm_clobbered, 0, sizeof (regs_asm_clobbered));
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
update_life_info (NULL, UPDATE_LIFE_GLOBAL, flags);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (reg_deaths)
{
free (reg_deaths);
reg_deaths = NULL;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Clean up. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (optimize && (flags & PROP_SCAN_DEAD_STORES))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
end_alias_analysis ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (dump_file)
dump_flow_info (dump_file, dump_flags);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Removing dead insns should have made jumptables really dead. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
delete_dead_jumptables ();
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A subroutine of verify_wide_reg, called through for_each_rtx.
Search for REGNO. If found, return 2 if it is not wider than
word_mode. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
verify_wide_reg_1 (rtx *px, void *pregno)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx x = *px;
unsigned int regno = *(int *) pregno;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (x) && REGNO (x) == regno)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
if (GET_MODE_BITSIZE (GET_MODE (x)) <= BITS_PER_WORD)
return 2;
return 1;
}
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A subroutine of verify_local_live_at_start. Search through insns
of BB looking for register REGNO. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
verify_wide_reg (int regno, basic_block bb)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx head = BB_HEAD (bb), end = BB_END (bb);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
while (1)
{
if (INSN_P (head))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int r = for_each_rtx (&PATTERN (head), verify_wide_reg_1, &regno);
if (r == 1)
return;
if (r == 2)
break;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (head == end)
break;
head = NEXT_INSN (head);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (dump_file)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
fprintf (dump_file, "Register %d died unexpectedly.\n", regno);
dump_bb (bb, dump_file, 0);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
internal_error ("internal consistency failure");
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A subroutine of update_life_info. Verify that there are no untoward
changes in live_at_start during a local update. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
verify_local_live_at_start (regset new_live_at_start, basic_block bb)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (reload_completed)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* After reload, there are no pseudos, nor subregs of multi-word
registers. The regsets should exactly match. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (! REG_SET_EQUAL_P (new_live_at_start,
bb->il.rtl->global_live_at_start))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (dump_file)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
fprintf (dump_file,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
"live_at_start mismatch in bb %d, aborting\nNew:\n",
bb->index);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
debug_bitmap_file (dump_file, new_live_at_start);
fputs ("Old:\n", dump_file);
dump_bb (bb, dump_file, 0);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
internal_error ("internal consistency failure");
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
else
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
reg_set_iterator rsi;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Find the set of changed registers. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
XOR_REG_SET (new_live_at_start, bb->il.rtl->global_live_at_start);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_REG_SET (new_live_at_start, 0, i, rsi)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* No registers should die. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REGNO_REG_SET_P (bb->il.rtl->global_live_at_start, i))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (dump_file)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
fprintf (dump_file,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
"Register %d died unexpectedly.\n", i);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
dump_bb (bb, dump_file, 0);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
internal_error ("internal consistency failure");
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Verify that the now-live register is wider than word_mode. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
verify_wide_reg (i, bb);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Updates life information starting with the basic blocks set in BLOCKS.
If BLOCKS is null, consider it to be the universal set.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
If EXTENT is UPDATE_LIFE_LOCAL, such as after splitting or peepholing,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
we are only expecting local modifications to basic blocks. If we find
extra registers live at the beginning of a block, then we either killed
useful data, or we have a broken split that wants data not provided.
If we find registers removed from live_at_start, that means we have
a broken peephole that is killing a register it shouldn't.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
??? This is not true in one situation -- when a pre-reload splitter
generates subregs of a multi-word pseudo, current life analysis will
lose the kill. So we _can_ have a pseudo go live. How irritating.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
It is also not true when a peephole decides that it doesn't need one
or more of the inputs.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Including PROP_REG_INFO does not properly refresh regs_ever_live
unless the caller resets it to zero. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
int
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
update_life_info (sbitmap blocks, enum update_life_extent extent,
int prop_flags)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
regset tmp;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i = 0;
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
int stabilized_prop_flags = prop_flags;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block bb;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
tmp = ALLOC_REG_SET (&reg_obstack);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
ndead = 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if ((prop_flags & PROP_REG_INFO) && !reg_deaths)
reg_deaths = XCNEWVEC (int, max_regno);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
timevar_push ((extent == UPDATE_LIFE_LOCAL || blocks)
? TV_LIFE_UPDATE : TV_LIFE);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Changes to the CFG are only allowed when
doing a global update for the entire CFG. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (!(prop_flags & PROP_ALLOW_CFG_CHANGES)
|| (extent != UPDATE_LIFE_LOCAL && !blocks));
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* For a global update, we go through the relaxation process again. */
if (extent != UPDATE_LIFE_LOCAL)
{
for ( ; ; )
{
int changed = 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
calculate_global_regs_live (blocks, blocks,
prop_flags & (PROP_SCAN_DEAD_CODE
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
| PROP_SCAN_DEAD_STORES
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
| PROP_ALLOW_CFG_CHANGES));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if ((prop_flags & (PROP_KILL_DEAD_CODE | PROP_ALLOW_CFG_CHANGES))
!= (PROP_KILL_DEAD_CODE | PROP_ALLOW_CFG_CHANGES))
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Removing dead code may allow the CFG to be simplified which
in turn may allow for further dead code detection / removal. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB_REVERSE (bb)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
COPY_REG_SET (tmp, bb->il.rtl->global_live_at_end);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
changed |= propagate_block (bb, tmp, NULL, NULL,
prop_flags & (PROP_SCAN_DEAD_CODE
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
| PROP_SCAN_DEAD_STORES
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
| PROP_KILL_DEAD_CODE));
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
/* Don't pass PROP_SCAN_DEAD_CODE or PROP_KILL_DEAD_CODE to
subsequent propagate_block calls, since removing or acting as
removing dead code can affect global register liveness, which
is supposed to be finalized for this call after this loop. */
stabilized_prop_flags
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&= ~(PROP_SCAN_DEAD_CODE | PROP_SCAN_DEAD_STORES
| PROP_KILL_DEAD_CODE);
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
if (! changed)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
/* We repeat regardless of what cleanup_cfg says. If there were
instructions deleted above, that might have been only a
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
partial improvement (see PARAM_MAX_FLOW_MEMORY_LOCATIONS usage).
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
Further improvement may be possible. */
cleanup_cfg (CLEANUP_EXPENSIVE);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Zap the life information from the last round. If we don't
do this, we can wind up with registers that no longer appear
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
in the code being marked live at entry. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
FOR_EACH_BB (bb)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
CLEAR_REG_SET (bb->il.rtl->global_live_at_start);
CLEAR_REG_SET (bb->il.rtl->global_live_at_end);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If asked, remove notes from the blocks we'll update. */
if (extent == UPDATE_LIFE_GLOBAL_RM_NOTES)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
count_or_remove_death_notes (blocks,
prop_flags & PROP_POST_REGSTACK ? -1 : 1);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else
{
/* FIXME: This can go when the dataflow branch has been merged in. */
/* For a local update, if we are creating new REG_DEAD notes, then we
must delete the old ones first to avoid conflicts if they are
different. */
if (prop_flags & PROP_DEATH_NOTES)
count_or_remove_death_notes (blocks,
prop_flags & PROP_POST_REGSTACK ? -1 : 1);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Clear log links in case we are asked to (re)compute them. */
if (prop_flags & PROP_LOG_LINKS)
clear_log_links (blocks);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (blocks)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
sbitmap_iterator sbi;
EXECUTE_IF_SET_IN_SBITMAP (blocks, 0, i, sbi)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
bb = BASIC_BLOCK (i);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (bb)
{
/* The bitmap may be flawed in that one of the basic
blocks may have been deleted before you get here. */
COPY_REG_SET (tmp, bb->il.rtl->global_live_at_end);
propagate_block (bb, tmp, NULL, NULL, stabilized_prop_flags);
if (extent == UPDATE_LIFE_LOCAL)
verify_local_live_at_start (tmp, bb);
}
};
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
else
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB_REVERSE (bb)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
COPY_REG_SET (tmp, bb->il.rtl->global_live_at_end);
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
propagate_block (bb, tmp, NULL, NULL, stabilized_prop_flags);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (extent == UPDATE_LIFE_LOCAL)
verify_local_live_at_start (tmp, bb);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
FREE_REG_SET (tmp);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (prop_flags & PROP_REG_INFO)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
reg_set_iterator rsi;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* The only pseudos that are live at the beginning of the function
are those that were not set anywhere in the function. local-alloc
doesn't know how to handle these correctly, so mark them as not
local to any one basic block. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_REG_SET (ENTRY_BLOCK_PTR->il.rtl->global_live_at_end,
FIRST_PSEUDO_REGISTER, i, rsi)
REG_BASIC_BLOCK (i) = REG_BLOCK_GLOBAL;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We have a problem with any pseudoreg that lives across the setjmp.
ANSI says that if a user variable does not change in value between
the setjmp and the longjmp, then the longjmp preserves it. This
includes longjmp from a place where the pseudo appears dead.
(In principle, the value still exists if it is in scope.)
If the pseudo goes in a hard reg, some other value may occupy
that hard reg where this pseudo is dead, thus clobbering the pseudo.
Conclusion: such a pseudo must not go in a hard reg. */
EXECUTE_IF_SET_IN_REG_SET (regs_live_at_setjmp,
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FIRST_PSEUDO_REGISTER, i, rsi)
{
if (regno_reg_rtx[i] != 0)
{
REG_LIVE_LENGTH (i) = -1;
REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;
}
}
}
if (reg_deaths)
{
free (reg_deaths);
reg_deaths = NULL;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
timevar_pop ((extent == UPDATE_LIFE_LOCAL || blocks)
? TV_LIFE_UPDATE : TV_LIFE);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (ndead && dump_file)
fprintf (dump_file, "deleted %i dead insns\n", ndead);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
return ndead;
}
/* Update life information in all blocks where BB_DIRTY is set. */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
update_life_info_in_dirty_blocks (enum update_life_extent extent, int prop_flags)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
sbitmap update_life_blocks = sbitmap_alloc (last_basic_block);
int n = 0;
basic_block bb;
int retval = 0;
sbitmap_zero (update_life_blocks);
FOR_EACH_BB (bb)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (bb->flags & BB_DIRTY)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
SET_BIT (update_life_blocks, bb->index);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
n++;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
}
if (n)
retval = update_life_info (update_life_blocks, extent, prop_flags);
sbitmap_free (update_life_blocks);
return retval;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Free the variables allocated by find_basic_blocks. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
void
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
free_basic_block_vars (void)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (basic_block_info)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
clear_edges ();
basic_block_info = NULL;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
n_basic_blocks = 0;
last_basic_block = 0;
n_edges = 0;
label_to_block_map = NULL;
ENTRY_BLOCK_PTR->aux = NULL;
ENTRY_BLOCK_PTR->il.rtl->global_live_at_end = NULL;
EXIT_BLOCK_PTR->aux = NULL;
EXIT_BLOCK_PTR->il.rtl->global_live_at_start = NULL;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Delete any insns that copy a register to itself. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
int
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
delete_noop_moves (void)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx insn, next;
basic_block bb;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
int nnoops = 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB (bb)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for (insn = BB_HEAD (bb); insn != NEXT_INSN (BB_END (bb)); insn = next)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
next = NEXT_INSN (insn);
if (INSN_P (insn) && noop_move_p (insn))
{
rtx note;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If we're about to remove the first insn of a libcall
then move the libcall note to the next real insn and
update the retval note. */
if ((note = find_reg_note (insn, REG_LIBCALL, NULL_RTX))
&& XEXP (note, 0) != insn)
{
rtx new_libcall_insn = next_real_insn (insn);
rtx retval_note = find_reg_note (XEXP (note, 0),
REG_RETVAL, NULL_RTX);
REG_NOTES (new_libcall_insn)
= gen_rtx_INSN_LIST (REG_LIBCALL, XEXP (note, 0),
REG_NOTES (new_libcall_insn));
XEXP (retval_note, 0) = new_libcall_insn;
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
delete_insn_and_edges (insn);
nnoops++;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (nnoops && dump_file)
fprintf (dump_file, "deleted %i noop moves\n", nnoops);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
return nnoops;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Delete any jump tables never referenced. We can't delete them at the
time of removing tablejump insn as they are referenced by the preceding
insns computing the destination, so we delay deleting and garbagecollect
them once life information is computed. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
delete_dead_jumptables (void)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
basic_block bb;
/* A dead jump table does not belong to any basic block. Scan insns
between two adjacent basic blocks. */
FOR_EACH_BB (bb)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rtx insn, next;
for (insn = NEXT_INSN (BB_END (bb));
insn && !NOTE_INSN_BASIC_BLOCK_P (insn);
insn = next)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
next = NEXT_INSN (insn);
if (LABEL_P (insn)
&& LABEL_NUSES (insn) == LABEL_PRESERVE_P (insn)
&& JUMP_P (next)
&& (GET_CODE (PATTERN (next)) == ADDR_VEC
|| GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
{
rtx label = insn, jump = next;
if (dump_file)
fprintf (dump_file, "Dead jumptable %i removed\n",
INSN_UID (insn));
next = NEXT_INSN (next);
delete_insn (jump);
delete_insn (label);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Determine if the stack pointer is constant over the life of the function.
Only useful before prologues have been emitted. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
notice_stack_pointer_modification_1 (rtx x, rtx pat ATTRIBUTE_UNUSED,
void *data ATTRIBUTE_UNUSED)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (x == stack_pointer_rtx
/* The stack pointer is only modified indirectly as the result
of a push until later in flow. See the comments in rtl.texi
regarding Embedded Side-Effects on Addresses. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| (MEM_P (x)
&& GET_RTX_CLASS (GET_CODE (XEXP (x, 0))) == RTX_AUTOINC
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& XEXP (XEXP (x, 0), 0) == stack_pointer_rtx))
current_function_sp_is_unchanging = 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
notice_stack_pointer_modification (void)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
basic_block bb;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Assume that the stack pointer is unchanging if alloca hasn't
been used. */
current_function_sp_is_unchanging = !current_function_calls_alloca;
if (! current_function_sp_is_unchanging)
return;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FOR_EACH_BB (bb)
FOR_BB_INSNS (bb, insn)
{
if (INSN_P (insn))
{
/* Check if insn modifies the stack pointer. */
note_stores (PATTERN (insn),
notice_stack_pointer_modification_1,
NULL);
if (! current_function_sp_is_unchanging)
return;
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark a register in SET. Hard registers in large modes get all
of their component registers set as well. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_reg (rtx reg, void *xset)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
regset set = (regset) xset;
int regno = REGNO (reg);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (GET_MODE (reg) != BLKmode);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_REGNO_REG_SET (set, regno);
if (regno < FIRST_PSEUDO_REGISTER)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int n = hard_regno_nregs[regno][GET_MODE (reg)];
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
while (--n > 0)
SET_REGNO_REG_SET (set, regno + n);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark those regs which are needed at the end of the function as live
at the end of the last basic block. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_regs_live_at_end (regset set)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If exiting needs the right stack value, consider the stack pointer
live at the end of the function. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if ((HAVE_epilogue && epilogue_completed)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
|| ! EXIT_IGNORE_STACK
|| (! FRAME_POINTER_REQUIRED
&& ! current_function_calls_alloca
&& flag_omit_frame_pointer)
|| current_function_sp_is_unchanging)
{
SET_REGNO_REG_SET (set, STACK_POINTER_REGNUM);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark the frame pointer if needed at the end of the function. If
we end up eliminating it, it will be removed from the live list
of each basic block by reload. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! reload_completed || frame_pointer_needed)
{
SET_REGNO_REG_SET (set, FRAME_POINTER_REGNUM);
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
/* If they are different, also mark the hard frame pointer as live. */
if (! LOCAL_REGNO (HARD_FRAME_POINTER_REGNUM))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
SET_REGNO_REG_SET (set, HARD_FRAME_POINTER_REGNUM);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
/* Many architectures have a GP register even without flag_pic.
Assume the pic register is not in use, or will be handled by
other means, if it is not fixed. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& fixed_regs[PIC_OFFSET_TABLE_REGNUM])
SET_REGNO_REG_SET (set, PIC_OFFSET_TABLE_REGNUM);
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark all global registers, and all registers used by the epilogue
as being live at the end of the function since they may be
referenced by our caller. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (global_regs[i] || EPILOGUE_USES (i))
SET_REGNO_REG_SET (set, i);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (HAVE_epilogue && epilogue_completed)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark all call-saved registers that we actually used. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (regs_ever_live[i] && ! LOCAL_REGNO (i)
&& ! TEST_HARD_REG_BIT (regs_invalidated_by_call, i))
SET_REGNO_REG_SET (set, i);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef EH_RETURN_DATA_REGNO
/* Mark the registers that will contain data for the handler. */
if (reload_completed && current_function_calls_eh_return)
for (i = 0; ; ++i)
{
unsigned regno = EH_RETURN_DATA_REGNO(i);
if (regno == INVALID_REGNUM)
break;
SET_REGNO_REG_SET (set, regno);
}
#endif
#ifdef EH_RETURN_STACKADJ_RTX
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if ((! HAVE_epilogue || ! epilogue_completed)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& current_function_calls_eh_return)
{
rtx tmp = EH_RETURN_STACKADJ_RTX;
if (tmp && REG_P (tmp))
mark_reg (tmp, set);
}
#endif
#ifdef EH_RETURN_HANDLER_RTX
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if ((! HAVE_epilogue || ! epilogue_completed)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& current_function_calls_eh_return)
{
rtx tmp = EH_RETURN_HANDLER_RTX;
if (tmp && REG_P (tmp))
mark_reg (tmp, set);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
/* Mark function return value. */
diddle_return_value (mark_reg, set);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Propagate global life info around the graph of basic blocks. Begin
considering blocks with their corresponding bit set in BLOCKS_IN.
If BLOCKS_IN is null, consider it the universal set.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
BLOCKS_OUT is set for every block that was changed. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
calculate_global_regs_live (sbitmap blocks_in, sbitmap blocks_out, int flags)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block *queue, *qhead, *qtail, *qend, bb;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset tmp, new_live_at_end, invalidated_by_eh_edge;
regset registers_made_dead;
bool failure_strategy_required = false;
int *block_accesses;
/* The registers that are modified within this in block. */
regset *local_sets;
/* The registers that are conditionally modified within this block.
In other words, regs that are set only as part of a COND_EXEC. */
regset *cond_local_sets;
unsigned int i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Some passes used to forget clear aux field of basic block causing
sick behavior here. */
#ifdef ENABLE_CHECKING
FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR, NULL, next_bb)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (!bb->aux);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#endif
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
tmp = ALLOC_REG_SET (&reg_obstack);
new_live_at_end = ALLOC_REG_SET (&reg_obstack);
invalidated_by_eh_edge = ALLOC_REG_SET (&reg_obstack);
registers_made_dead = ALLOC_REG_SET (&reg_obstack);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Inconveniently, this is only readily available in hard reg set form. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; ++i)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (TEST_HARD_REG_BIT (regs_invalidated_by_call, i))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
SET_REGNO_REG_SET (invalidated_by_eh_edge, i);
/* The exception handling registers die at eh edges. */
#ifdef EH_RETURN_DATA_REGNO
for (i = 0; ; ++i)
{
unsigned regno = EH_RETURN_DATA_REGNO (i);
if (regno == INVALID_REGNUM)
break;
SET_REGNO_REG_SET (invalidated_by_eh_edge, regno);
}
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Allocate space for the sets of local properties. */
local_sets = XCNEWVEC (bitmap, last_basic_block);
cond_local_sets = XCNEWVEC (bitmap, last_basic_block);
/* Create a worklist. Allocate an extra slot for the `head == tail'
style test for an empty queue doesn't work with a full queue. */
queue = XNEWVEC (basic_block, n_basic_blocks + 1);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
qtail = queue;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
qhead = qend = queue + n_basic_blocks;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Queue the blocks set in the initial mask. Do this in reverse block
number order so that we are more likely for the first round to do
useful work. We use AUX non-null to flag that the block is queued. */
if (blocks_in)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB (bb)
if (TEST_BIT (blocks_in, bb->index))
{
*--qhead = bb;
bb->aux = bb;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
else
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB (bb)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
*--qhead = bb;
bb->aux = bb;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
block_accesses = XCNEWVEC (int, last_basic_block);
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
/* We clean aux when we remove the initially-enqueued bbs, but we
don't enqueue ENTRY and EXIT initially, so clean them upfront and
unconditionally. */
ENTRY_BLOCK_PTR->aux = EXIT_BLOCK_PTR->aux = NULL;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (blocks_out)
sbitmap_zero (blocks_out);
/* We work through the queue until there are no more blocks. What
is live at the end of this block is precisely the union of what
is live at the beginning of all its successors. So, we set its
GLOBAL_LIVE_AT_END field based on the GLOBAL_LIVE_AT_START field
for its successors. Then, we compute GLOBAL_LIVE_AT_START for
this block by walking through the instructions in this block in
reverse order and updating as we go. If that changed
GLOBAL_LIVE_AT_START, we add the predecessors of the block to the
queue; they will now need to recalculate GLOBAL_LIVE_AT_END.
We are guaranteed to terminate, because GLOBAL_LIVE_AT_START
never shrinks. If a register appears in GLOBAL_LIVE_AT_START, it
must either be live at the end of the block, or used within the
block. In the latter case, it will certainly never disappear
from GLOBAL_LIVE_AT_START. In the former case, the register
could go away only if it disappeared from GLOBAL_LIVE_AT_START
for one of the successor blocks. By induction, that cannot
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
occur.
??? This reasoning doesn't work if we start from non-empty initial
GLOBAL_LIVE_AT_START sets. And there are actually two problems:
1) Updating may not terminate (endless oscillation).
2) Even if it does (and it usually does), the resulting information
may be inaccurate. Consider for example the following case:
a = ...;
while (...) {...} -- 'a' not mentioned at all
... = a;
If the use of 'a' is deleted between two calculations of liveness
information and the initial sets are not cleared, the information
about a's liveness will get stuck inside the loop and the set will
appear not to be dead.
We do not attempt to solve 2) -- the information is conservatively
correct (i.e. we never claim that something live is dead) and the
amount of optimization opportunities missed due to this problem is
not significant.
1) is more serious. In order to fix it, we monitor the number of times
each block is processed. Once one of the blocks has been processed more
times than the maximum number of rounds, we use the following strategy:
When a register disappears from one of the sets, we add it to a MAKE_DEAD
set, remove all registers in this set from all GLOBAL_LIVE_AT_* sets and
add the blocks with changed sets into the queue. Thus we are guaranteed
to terminate (the worst case corresponds to all registers in MADE_DEAD,
in which case the original reasoning above is valid), but in general we
only fix up a few offending registers.
The maximum number of rounds for computing liveness is the largest of
MAX_LIVENESS_ROUNDS and the latest loop depth count for this function. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
while (qhead != qtail)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int rescan, changed;
basic_block bb;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
edge e;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
edge_iterator ei;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
bb = *qhead++;
if (qhead == qend)
qhead = queue;
bb->aux = NULL;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Should we start using the failure strategy? */
if (bb != ENTRY_BLOCK_PTR)
{
int max_liveness_rounds =
MAX (MAX_LIVENESS_ROUNDS, cfun->max_loop_depth);
block_accesses[bb->index]++;
if (block_accesses[bb->index] > max_liveness_rounds)
failure_strategy_required = true;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Begin by propagating live_at_start from the successor blocks. */
CLEAR_REG_SET (new_live_at_end);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (EDGE_COUNT (bb->succs) > 0)
FOR_EACH_EDGE (e, ei, bb->succs)
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
{
basic_block sb = e->dest;
/* Call-clobbered registers die across exception and
call edges. */
/* ??? Abnormal call edges ignored for the moment, as this gets
confused by sibling call edges, which crashes reg-stack. */
if (e->flags & EDGE_EH)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bitmap_ior_and_compl_into (new_live_at_end,
sb->il.rtl->global_live_at_start,
invalidated_by_eh_edge);
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
else
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
IOR_REG_SET (new_live_at_end, sb->il.rtl->global_live_at_start);
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
/* If a target saves one register in another (instead of on
the stack) the save register will need to be live for EH. */
if (e->flags & EDGE_EH)
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (EH_USES (i))
SET_REGNO_REG_SET (new_live_at_end, i);
}
else
{
/* This might be a noreturn function that throws. And
even if it isn't, getting the unwind info right helps
debugging. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (EH_USES (i))
SET_REGNO_REG_SET (new_live_at_end, i);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* The all-important stack pointer must always be live. */
SET_REGNO_REG_SET (new_live_at_end, STACK_POINTER_REGNUM);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Before reload, there are a few registers that must be forced
live everywhere -- which might not already be the case for
blocks within infinite loops. */
if (! reload_completed)
{
/* Any reference to any pseudo before reload is a potential
reference of the frame pointer. */
SET_REGNO_REG_SET (new_live_at_end, FRAME_POINTER_REGNUM);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
/* Pseudos with argument area equivalences may require
reloading via the argument pointer. */
if (fixed_regs[ARG_POINTER_REGNUM])
SET_REGNO_REG_SET (new_live_at_end, ARG_POINTER_REGNUM);
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Any constant, or pseudo with constant equivalences, may
require reloading from memory using the pic register. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& fixed_regs[PIC_OFFSET_TABLE_REGNUM])
SET_REGNO_REG_SET (new_live_at_end, PIC_OFFSET_TABLE_REGNUM);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (bb == ENTRY_BLOCK_PTR)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
COPY_REG_SET (bb->il.rtl->global_live_at_end, new_live_at_end);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
continue;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* On our first pass through this block, we'll go ahead and continue.
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Recognize first pass by checking if local_set is NULL for this
basic block. On subsequent passes, we get to skip out early if
live_at_end wouldn't have changed. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (local_sets[bb->index] == NULL)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
local_sets[bb->index] = ALLOC_REG_SET (&reg_obstack);
cond_local_sets[bb->index] = ALLOC_REG_SET (&reg_obstack);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rescan = 1;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
else
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If any bits were removed from live_at_end, we'll have to
rescan the block. This wouldn't be necessary if we had
precalculated local_live, however with PROP_SCAN_DEAD_CODE
local_live is really dependent on live_at_end. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rescan = bitmap_intersect_compl_p (bb->il.rtl->global_live_at_end,
new_live_at_end);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!rescan)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset cond_local_set;
/* If any of the registers in the new live_at_end set are
conditionally set in this basic block, we must rescan.
This is because conditional lifetimes at the end of the
block do not just take the live_at_end set into
account, but also the liveness at the start of each
successor block. We can miss changes in those sets if
we only compare the new live_at_end against the
previous one. */
cond_local_set = cond_local_sets[bb->index];
rescan = bitmap_intersect_p (new_live_at_end, cond_local_set);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!rescan)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset local_set;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Find the set of changed bits. Take this opportunity
to notice that this set is empty and early out. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bitmap_xor (tmp, bb->il.rtl->global_live_at_end, new_live_at_end);
if (bitmap_empty_p (tmp))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
continue;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If any of the changed bits overlap with local_sets[bb],
we'll have to rescan the block. */
local_set = local_sets[bb->index];
rescan = bitmap_intersect_p (tmp, local_set);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Let our caller know that BB changed enough to require its
death notes updated. */
if (blocks_out)
SET_BIT (blocks_out, bb->index);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! rescan)
{
/* Add to live_at_start the set of all registers in
new_live_at_end that aren't in the old live_at_end. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
changed = bitmap_ior_and_compl_into (bb->il.rtl->global_live_at_start,
new_live_at_end,
bb->il.rtl->global_live_at_end);
COPY_REG_SET (bb->il.rtl->global_live_at_end, new_live_at_end);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! changed)
continue;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
COPY_REG_SET (bb->il.rtl->global_live_at_end, new_live_at_end);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Rescan the block insn by insn to turn (a copy of) live_at_end
into live_at_start. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
propagate_block (bb, new_live_at_end,
local_sets[bb->index],
cond_local_sets[bb->index],
flags);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If live_at start didn't change, no need to go farther. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_SET_EQUAL_P (bb->il.rtl->global_live_at_start,
new_live_at_end))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
continue;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (failure_strategy_required)
{
/* Get the list of registers that were removed from the
bb->global_live_at_start set. */
bitmap_and_compl (tmp, bb->il.rtl->global_live_at_start,
new_live_at_end);
if (!bitmap_empty_p (tmp))
{
bool pbb_changed;
basic_block pbb;
/* It should not happen that one of registers we have
removed last time is disappears again before any other
register does. */
pbb_changed = bitmap_ior_into (registers_made_dead, tmp);
gcc_assert (pbb_changed);
/* Now remove the registers from all sets. */
FOR_EACH_BB (pbb)
{
pbb_changed = false;
pbb_changed
|= bitmap_and_compl_into
(pbb->il.rtl->global_live_at_start,
registers_made_dead);
pbb_changed
|= bitmap_and_compl_into
(pbb->il.rtl->global_live_at_end,
registers_made_dead);
if (!pbb_changed)
continue;
/* Note the (possible) change. */
if (blocks_out)
SET_BIT (blocks_out, pbb->index);
/* Makes sure to really rescan the block. */
if (local_sets[pbb->index])
{
FREE_REG_SET (local_sets[pbb->index]);
FREE_REG_SET (cond_local_sets[pbb->index]);
local_sets[pbb->index] = 0;
}
/* Add it to the queue. */
if (pbb->aux == NULL)
{
*qtail++ = pbb;
if (qtail == qend)
qtail = queue;
pbb->aux = pbb;
}
}
continue;
}
} /* end of failure_strategy_required */
COPY_REG_SET (bb->il.rtl->global_live_at_start, new_live_at_end);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Queue all predecessors of BB so that we may re-examine
their live_at_end. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FOR_EACH_EDGE (e, ei, bb->preds)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
basic_block pb = e->src;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert ((e->flags & EDGE_FAKE) == 0);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (pb->aux == NULL)
{
*qtail++ = pb;
if (qtail == qend)
qtail = queue;
pb->aux = pb;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
FREE_REG_SET (tmp);
FREE_REG_SET (new_live_at_end);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FREE_REG_SET (invalidated_by_eh_edge);
FREE_REG_SET (registers_made_dead);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (blocks_out)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
sbitmap_iterator sbi;
EXECUTE_IF_SET_IN_SBITMAP (blocks_out, 0, i, sbi)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
basic_block bb = BASIC_BLOCK (i);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FREE_REG_SET (local_sets[bb->index]);
FREE_REG_SET (cond_local_sets[bb->index]);
};
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
else
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB (bb)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FREE_REG_SET (local_sets[bb->index]);
FREE_REG_SET (cond_local_sets[bb->index]);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
free (block_accesses);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free (queue);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
free (cond_local_sets);
free (local_sets);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* This structure is used to pass parameters to and from the
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
the function find_regno_partial(). It is used to pass in the
register number we are looking, as well as to return any rtx
we find. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
typedef struct {
unsigned regno_to_find;
rtx retval;
} find_regno_partial_param;
/* Find the rtx for the reg numbers specified in 'data' if it is
part of an expression which only uses part of the register. Return
it in the structure passed in. */
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_regno_partial (rtx *ptr, void *data)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
find_regno_partial_param *param = (find_regno_partial_param *)data;
unsigned reg = param->regno_to_find;
param->retval = NULL_RTX;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (*ptr == NULL_RTX)
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
switch (GET_CODE (*ptr))
{
case ZERO_EXTRACT:
case SIGN_EXTRACT:
case STRICT_LOW_PART:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (XEXP (*ptr, 0)) && REGNO (XEXP (*ptr, 0)) == reg)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
param->retval = XEXP (*ptr, 0);
return 1;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SUBREG:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (SUBREG_REG (*ptr))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& REGNO (SUBREG_REG (*ptr)) == reg)
{
param->retval = SUBREG_REG (*ptr);
return 1;
}
break;
default:
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Process all immediate successors of the entry block looking for pseudo
registers which are live on entry. Find all of those whose first
instance is a partial register reference of some kind, and initialize
them to 0 after the entry block. This will prevent bit sets within
registers whose value is unknown, and may contain some kind of sticky
bits we don't want. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
initialize_uninitialized_subregs (void)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx insn;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
edge e;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned reg, did_something = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
find_regno_partial_param param;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
edge_iterator ei;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
basic_block bb = e->dest;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset map = bb->il.rtl->global_live_at_start;
reg_set_iterator rsi;
EXECUTE_IF_SET_IN_REG_SET (map, FIRST_PSEUDO_REGISTER, reg, rsi)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
int uid = REGNO_FIRST_UID (reg);
rtx i;
/* Find an insn which mentions the register we are looking for.
Its preferable to have an instance of the register's rtl since
there may be various flags set which we need to duplicate.
If we can't find it, its probably an automatic whose initial
value doesn't matter, or hopefully something we don't care about. */
for (i = get_insns (); i && INSN_UID (i) != uid; i = NEXT_INSN (i))
;
if (i != NULL_RTX)
{
/* Found the insn, now get the REG rtx, if we can. */
param.regno_to_find = reg;
for_each_rtx (&i, find_regno_partial, &param);
if (param.retval != NULL_RTX)
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
start_sequence ();
emit_move_insn (param.retval,
CONST0_RTX (GET_MODE (param.retval)));
insn = get_insns ();
end_sequence ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
insert_insn_on_edge (insn, e);
did_something = 1;
}
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (did_something)
commit_edge_insertions ();
return did_something;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Subroutines of life analysis. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Allocate the permanent data structures that represent the results
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
of life analysis. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
allocate_bb_life_data (void)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block bb;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR, NULL, next_bb)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (bb->il.rtl->global_live_at_start)
{
CLEAR_REG_SET (bb->il.rtl->global_live_at_start);
CLEAR_REG_SET (bb->il.rtl->global_live_at_end);
}
else
{
bb->il.rtl->global_live_at_start = ALLOC_REG_SET (&reg_obstack);
bb->il.rtl->global_live_at_end = ALLOC_REG_SET (&reg_obstack);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regs_live_at_setjmp = ALLOC_REG_SET (&reg_obstack);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
allocate_reg_life_data (void)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
int i;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
max_regno = max_reg_num ();
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (!reg_deaths);
reg_deaths = XCNEWVEC (int, max_regno);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Recalculate the register space, in case it has grown. Old style
vector oriented regsets would set regset_{size,bytes} here also. */
allocate_reg_info (max_regno, FALSE, FALSE);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Reset all the data we'll collect in propagate_block and its
subroutines. */
for (i = 0; i < max_regno; i++)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_N_SETS (i) = 0;
REG_N_REFS (i) = 0;
REG_N_DEATHS (i) = 0;
REG_N_CALLS_CROSSED (i) = 0;
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
REG_N_THROWING_CALLS_CROSSED (i) = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_LIVE_LENGTH (i) = 0;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
REG_FREQ (i) = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
/* Delete dead instructions for propagate_block. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
propagate_block_delete_insn (rtx insn)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx inote = find_reg_note (insn, REG_LABEL, NULL_RTX);
/* If the insn referred to a label, and that label was attached to
an ADDR_VEC, it's safe to delete the ADDR_VEC. In fact, it's
pretty much mandatory to delete it, because the ADDR_VEC may be
referencing labels that no longer exist.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
INSN may reference a deleted label, particularly when a jump
table has been optimized into a direct jump. There's no
real good way to fix up the reference to the deleted label
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
when the label is deleted, so we just allow it here. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (inote && LABEL_P (inote))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx label = XEXP (inote, 0);
rtx next;
/* The label may be forced if it has been put in the constant
pool. If that is the only use we must discard the table
jump following it, but not the label itself. */
if (LABEL_NUSES (label) == 1 + LABEL_PRESERVE_P (label)
&& (next = next_nonnote_insn (label)) != NULL
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& JUMP_P (next)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& (GET_CODE (PATTERN (next)) == ADDR_VEC
|| GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
{
rtx pat = PATTERN (next);
int diff_vec_p = GET_CODE (pat) == ADDR_DIFF_VEC;
int len = XVECLEN (pat, diff_vec_p);
int i;
for (i = 0; i < len; i++)
LABEL_NUSES (XEXP (XVECEXP (pat, diff_vec_p, i), 0))--;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
delete_insn_and_edges (next);
ndead++;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
delete_insn_and_edges (insn);
ndead++;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Delete dead libcalls for propagate_block. Return the insn
before the libcall. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
propagate_block_delete_libcall (rtx insn, rtx note)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx first = XEXP (note, 0);
rtx before = PREV_INSN (first);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
delete_insn_chain_and_edges (first, insn);
ndead++;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return before;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Update the life-status of regs for one insn. Return the previous insn. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
propagate_one_insn (struct propagate_block_info *pbi, rtx insn)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx prev = PREV_INSN (insn);
int flags = pbi->flags;
int insn_is_dead = 0;
int libcall_is_dead = 0;
rtx note;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! INSN_P (insn))
return prev;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
note = find_reg_note (insn, REG_RETVAL, NULL_RTX);
if (flags & PROP_SCAN_DEAD_CODE)
{
insn_is_dead = insn_dead_p (pbi, PATTERN (insn), 0, REG_NOTES (insn));
libcall_is_dead = (insn_is_dead && note != 0
&& libcall_dead_p (pbi, note, insn));
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If an instruction consists of just dead store(s) on final pass,
delete it. */
if ((flags & PROP_KILL_DEAD_CODE) && insn_is_dead)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If we're trying to delete a prologue or epilogue instruction
that isn't flagged as possibly being dead, something is wrong.
But if we are keeping the stack pointer depressed, we might well
be deleting insns that are used to compute the amount to update
it by, so they are fine. */
if (reload_completed
&& !(TREE_CODE (TREE_TYPE (current_function_decl)) == FUNCTION_TYPE
&& (TYPE_RETURNS_STACK_DEPRESSED
(TREE_TYPE (current_function_decl))))
&& (((HAVE_epilogue || HAVE_prologue)
&& prologue_epilogue_contains (insn))
|| (HAVE_sibcall_epilogue
&& sibcall_epilogue_contains (insn)))
&& find_reg_note (insn, REG_MAYBE_DEAD, NULL_RTX) == 0)
fatal_insn ("Attempt to delete prologue/epilogue insn:", insn);
/* Record sets. Do this even for dead instructions, since they
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
would have killed the values if they hadn't been deleted. To
be consistent, we also have to emit a clobber when we delete
an insn that clobbers a live register. */
pbi->flags |= PROP_DEAD_INSN;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mark_set_regs (pbi, PATTERN (insn), insn);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
pbi->flags &= ~PROP_DEAD_INSN;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* CC0 is now known to be dead. Either this insn used it,
in which case it doesn't anymore, or clobbered it,
so the next insn can't use it. */
pbi->cc0_live = 0;
if (libcall_is_dead)
Gcc 3.4.4 release.
2005-06-03 03:28:44 +00:00
prev = propagate_block_delete_libcall (insn, note);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* If INSN contains a RETVAL note and is dead, but the libcall
as a whole is not dead, then we want to remove INSN, but
not the whole libcall sequence.
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
However, we need to also remove the dangling REG_LIBCALL
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
note so that we do not have mis-matched LIBCALL/RETVAL
notes. In theory we could find a new location for the
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
REG_RETVAL note, but it hardly seems worth the effort.
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
NOTE at this point will be the RETVAL note if it exists. */
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
if (note)
{
rtx libcall_note;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
libcall_note
= find_reg_note (XEXP (note, 0), REG_LIBCALL, NULL_RTX);
remove_note (XEXP (note, 0), libcall_note);
}
/* Similarly if INSN contains a LIBCALL note, remove the
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
dangling REG_RETVAL note. */
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
note = find_reg_note (insn, REG_LIBCALL, NULL_RTX);
if (note)
{
rtx retval_note;
retval_note
= find_reg_note (XEXP (note, 0), REG_RETVAL, NULL_RTX);
remove_note (XEXP (note, 0), retval_note);
}
/* Now delete INSN. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
propagate_block_delete_insn (insn);
Gcc 3.2.1-prerelease from the FSF anoncvs repo gcc-3_2-branch on 1-Sep-2002 00:00:01 EDT.
2002-09-01 20:38:57 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return prev;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* See if this is an increment or decrement that can be merged into
a following memory address. */
#ifdef AUTO_INC_DEC
{
rtx x = single_set (insn);
/* Does this instruction increment or decrement a register? */
if ((flags & PROP_AUTOINC)
&& x != 0
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (SET_DEST (x))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& (GET_CODE (SET_SRC (x)) == PLUS
|| GET_CODE (SET_SRC (x)) == MINUS)
&& XEXP (SET_SRC (x), 0) == SET_DEST (x)
&& GET_CODE (XEXP (SET_SRC (x), 1)) == CONST_INT
/* Ok, look for a following memory ref we can combine with.
If one is found, change the memory ref to a PRE_INC
or PRE_DEC, cancel this insn, and return 1.
Return 0 if nothing has been done. */
&& try_pre_increment_1 (pbi, insn))
return prev;
}
#endif /* AUTO_INC_DEC */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
CLEAR_REG_SET (pbi->new_set);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is not the final pass, and this insn is copying the value of
a library call and it's dead, don't scan the insns that perform the
library call, so that the call's arguments are not marked live. */
if (libcall_is_dead)
{
/* Record the death of the dest reg. */
mark_set_regs (pbi, PATTERN (insn), insn);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
insn = XEXP (note, 0);
return PREV_INSN (insn);
}
else if (GET_CODE (PATTERN (insn)) == SET
&& SET_DEST (PATTERN (insn)) == stack_pointer_rtx
&& GET_CODE (SET_SRC (PATTERN (insn))) == PLUS
&& XEXP (SET_SRC (PATTERN (insn)), 0) == stack_pointer_rtx
&& GET_CODE (XEXP (SET_SRC (PATTERN (insn)), 1)) == CONST_INT)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
/* We have an insn to pop a constant amount off the stack.
(Such insns use PLUS regardless of the direction of the stack,
and any insn to adjust the stack by a constant is always a pop
or part of a push.)
These insns, if not dead stores, have no effect on life, though
they do have an effect on the memory stores we are tracking. */
invalidate_mems_from_set (pbi, stack_pointer_rtx);
/* Still, we need to update local_set, lest ifcvt.c:dead_or_predicable
concludes that the stack pointer is not modified. */
mark_set_regs (pbi, PATTERN (insn), insn);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
{
/* Any regs live at the time of a call instruction must not go
in a register clobbered by calls. Find all regs now live and
record this for them. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (CALL_P (insn) && (flags & PROP_REG_INFO))
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
reg_set_iterator rsi;
EXECUTE_IF_SET_IN_REG_SET (pbi->reg_live, 0, i, rsi)
REG_N_CALLS_CROSSED (i)++;
if (can_throw_internal (insn))
EXECUTE_IF_SET_IN_REG_SET (pbi->reg_live, 0, i, rsi)
REG_N_THROWING_CALLS_CROSSED (i)++;
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Record sets. Do this even for dead instructions, since they
would have killed the values if they hadn't been deleted. */
mark_set_regs (pbi, PATTERN (insn), insn);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (CALL_P (insn))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.3.1-release.
2003-08-22 02:56:07 +00:00
regset live_at_end;
bool sibcall_p;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx note, cond;
Gcc 3.3.1-release.
2003-08-22 02:56:07 +00:00
int i;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
cond = NULL_RTX;
if (GET_CODE (PATTERN (insn)) == COND_EXEC)
cond = COND_EXEC_TEST (PATTERN (insn));
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Non-constant calls clobber memory, constant calls do not
clobber memory, though they may clobber outgoing arguments
on the stack. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! CONST_OR_PURE_CALL_P (insn))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free_EXPR_LIST_list (&pbi->mem_set_list);
pbi->mem_set_list_len = 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
else
invalidate_mems_from_set (pbi, stack_pointer_rtx);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* There may be extra registers to be clobbered. */
for (note = CALL_INSN_FUNCTION_USAGE (insn);
note;
note = XEXP (note, 1))
if (GET_CODE (XEXP (note, 0)) == CLOBBER)
mark_set_1 (pbi, CLOBBER, XEXP (XEXP (note, 0), 0),
cond, insn, pbi->flags);
Gcc 3.3.1-release.
2003-08-22 02:56:07 +00:00
/* Calls change all call-used and global registers; sibcalls do not
clobber anything that must be preserved at end-of-function,
except for return values. */
sibcall_p = SIBLING_CALL_P (insn);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
live_at_end = EXIT_BLOCK_PTR->il.rtl->global_live_at_start;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
Gcc 3.3.1-release.
2003-08-22 02:56:07 +00:00
if (TEST_HARD_REG_BIT (regs_invalidated_by_call, i)
&& ! (sibcall_p
&& REGNO_REG_SET_P (live_at_end, i)
&& ! refers_to_regno_p (i, i+1,
current_function_return_rtx,
(rtx *) 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
enum rtx_code code = global_regs[i] ? SET : CLOBBER;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We do not want REG_UNUSED notes for these registers. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_set_1 (pbi, code, regno_reg_rtx[i], cond, insn,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
pbi->flags & ~(PROP_DEATH_NOTES | PROP_REG_INFO));
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If an insn doesn't use CC0, it becomes dead since we assume
that every insn clobbers it. So show it dead here;
mark_used_regs will set it live if it is referenced. */
pbi->cc0_live = 0;
/* Record uses. */
if (! insn_is_dead)
mark_used_regs (pbi, PATTERN (insn), NULL_RTX, insn);
/* Sometimes we may have inserted something before INSN (such as a move)
when we make an auto-inc. So ensure we will scan those insns. */
#ifdef AUTO_INC_DEC
prev = PREV_INSN (insn);
#endif
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (! insn_is_dead && CALL_P (insn))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
rtx note, cond;
cond = NULL_RTX;
if (GET_CODE (PATTERN (insn)) == COND_EXEC)
cond = COND_EXEC_TEST (PATTERN (insn));
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Calls use their arguments, and may clobber memory which
address involves some register. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (note = CALL_INSN_FUNCTION_USAGE (insn);
note;
note = XEXP (note, 1))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* We find USE or CLOBBER entities in a FUNCTION_USAGE list: both
of which mark_used_regs knows how to handle. */
mark_used_regs (pbi, XEXP (XEXP (note, 0), 0), cond, insn);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* The stack ptr is used (honorarily) by a CALL insn. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if ((flags & PROP_REG_INFO)
&& !REGNO_REG_SET_P (pbi->reg_live, STACK_POINTER_REGNUM))
reg_deaths[STACK_POINTER_REGNUM] = pbi->insn_num;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_REGNO_REG_SET (pbi->reg_live, STACK_POINTER_REGNUM);
/* Calls may also reference any of the global registers,
so they are made live. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (global_regs[i])
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
mark_used_reg (pbi, regno_reg_rtx[i], cond, insn);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
pbi->insn_num++;
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return prev;
}
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Initialize a propagate_block_info struct for public consumption.
Note that the structure itself is opaque to this file, but that
the user can use the regsets provided here. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct propagate_block_info *
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
init_propagate_block_info (basic_block bb, regset live, regset local_set,
regset cond_local_set, int flags)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
struct propagate_block_info *pbi = XNEW (struct propagate_block_info);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
pbi->bb = bb;
pbi->reg_live = live;
pbi->mem_set_list = NULL_RTX;
pbi->mem_set_list_len = 0;
pbi->local_set = local_set;
pbi->cond_local_set = cond_local_set;
pbi->cc0_live = 0;
pbi->flags = flags;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
pbi->insn_num = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
pbi->reg_next_use = XCNEWVEC (rtx, max_reg_num ());
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
pbi->reg_next_use = NULL;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
pbi->new_set = BITMAP_ALLOC (NULL);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
pbi->reg_cond_dead = splay_tree_new (splay_tree_compare_ints, NULL,
free_reg_cond_life_info);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
pbi->reg_cond_reg = BITMAP_ALLOC (NULL);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* If this block ends in a conditional branch, for each register
live from one side of the branch and not the other, record the
register as conditionally dead. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (JUMP_P (BB_END (bb))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& any_condjump_p (BB_END (bb)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset diff = ALLOC_REG_SET (&reg_obstack);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
basic_block bb_true, bb_false;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Identify the successor blocks. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bb_true = EDGE_SUCC (bb, 0)->dest;
if (!single_succ_p (bb))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bb_false = EDGE_SUCC (bb, 1)->dest;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (EDGE_SUCC (bb, 0)->flags & EDGE_FALLTHRU)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
basic_block t = bb_false;
bb_false = bb_true;
bb_true = t;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else
gcc_assert (EDGE_SUCC (bb, 1)->flags & EDGE_FALLTHRU);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
else
{
/* This can happen with a conditional jump to the next insn. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (JUMP_LABEL (BB_END (bb)) == BB_HEAD (bb_true));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Simplest way to do nothing. */
bb_false = bb_true;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Compute which register lead different lives in the successors. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bitmap_xor (diff, bb_true->il.rtl->global_live_at_start,
bb_false->il.rtl->global_live_at_start);
if (!bitmap_empty_p (diff))
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Extract the condition from the branch. */
rtx set_src = SET_SRC (pc_set (BB_END (bb)));
rtx cond_true = XEXP (set_src, 0);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx reg = XEXP (cond_true, 0);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
enum rtx_code inv_cond;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* We can only track conditional lifetimes if the condition is
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
in the form of a reversible comparison of a register against
zero. If the condition is more complex than that, then it is
safe not to record any information. */
inv_cond = reversed_comparison_code (cond_true, BB_END (bb));
if (inv_cond != UNKNOWN
&& REG_P (reg)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& XEXP (cond_true, 1) == const0_rtx)
{
rtx cond_false
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
= gen_rtx_fmt_ee (inv_cond,
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GET_MODE (cond_true), XEXP (cond_true, 0),
XEXP (cond_true, 1));
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
reg_set_iterator rsi;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (GET_CODE (XEXP (set_src, 1)) == PC)
{
rtx t = cond_false;
cond_false = cond_true;
cond_true = t;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
SET_REGNO_REG_SET (pbi->reg_cond_reg, REGNO (reg));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* For each such register, mark it conditionally dead. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_REG_SET (diff, 0, i, rsi)
{
struct reg_cond_life_info *rcli;
rtx cond;
rcli = XNEW (struct reg_cond_life_info);
if (REGNO_REG_SET_P (bb_true->il.rtl->global_live_at_start,
i))
cond = cond_false;
else
cond = cond_true;
rcli->condition = cond;
rcli->stores = const0_rtx;
rcli->orig_condition = cond;
splay_tree_insert (pbi->reg_cond_dead, i,
(splay_tree_value) rcli);
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
FREE_REG_SET (diff);
}
#endif
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this block has no successors, any stores to the frame that aren't
used later in the block are dead. So make a pass over the block
recording any such that are made and show them dead at the end. We do
a very conservative and simple job here. */
if (optimize
&& ! (TREE_CODE (TREE_TYPE (current_function_decl)) == FUNCTION_TYPE
&& (TYPE_RETURNS_STACK_DEPRESSED
(TREE_TYPE (current_function_decl))))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& (flags & PROP_SCAN_DEAD_STORES)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& (EDGE_COUNT (bb->succs) == 0
|| (single_succ_p (bb)
&& single_succ (bb) == EXIT_BLOCK_PTR
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& ! current_function_calls_eh_return)))
{
rtx insn, set;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for (insn = BB_END (bb); insn != BB_HEAD (bb); insn = PREV_INSN (insn))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (NONJUMP_INSN_P (insn)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& (set = single_set (insn))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& MEM_P (SET_DEST (set)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx mem = SET_DEST (set);
rtx canon_mem = canon_rtx (mem);
if (XEXP (canon_mem, 0) == frame_pointer_rtx
|| (GET_CODE (XEXP (canon_mem, 0)) == PLUS
&& XEXP (XEXP (canon_mem, 0), 0) == frame_pointer_rtx
&& GET_CODE (XEXP (XEXP (canon_mem, 0), 1)) == CONST_INT))
add_to_mem_set_list (pbi, canon_mem);
}
}
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return pbi;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Release a propagate_block_info struct. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
free_propagate_block_info (struct propagate_block_info *pbi)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free_EXPR_LIST_list (&pbi->mem_set_list);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
BITMAP_FREE (pbi->new_set);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
splay_tree_delete (pbi->reg_cond_dead);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
BITMAP_FREE (pbi->reg_cond_reg);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (pbi->flags & PROP_REG_INFO)
{
int num = pbi->insn_num;
unsigned i;
reg_set_iterator rsi;
EXECUTE_IF_SET_IN_REG_SET (pbi->reg_live, 0, i, rsi)
{
REG_LIVE_LENGTH (i) += num - reg_deaths[i];
reg_deaths[i] = 0;
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (pbi->reg_next_use)
free (pbi->reg_next_use);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free (pbi);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Compute the registers live at the beginning of a basic block BB from
those live at the end.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
When called, REG_LIVE contains those live at the end. On return, it
contains those live at the beginning.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
LOCAL_SET, if non-null, will be set with all registers killed
unconditionally by this basic block.
Likewise, COND_LOCAL_SET, if non-null, will be set with all registers
killed conditionally by this basic block. If there is any unconditional
set of a register, then the corresponding bit will be set in LOCAL_SET
and cleared in COND_LOCAL_SET.
It is valid for LOCAL_SET and COND_LOCAL_SET to be the same set. In this
case, the resulting set will be equal to the union of the two sets that
would otherwise be computed.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Return nonzero if an INSN is deleted (i.e. by dead code removal). */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
propagate_block (basic_block bb, regset live, regset local_set,
regset cond_local_set, int flags)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
struct propagate_block_info *pbi;
rtx insn, prev;
int changed;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
pbi = init_propagate_block_info (bb, live, local_set, cond_local_set, flags);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (flags & PROP_REG_INFO)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
reg_set_iterator rsi;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Process the regs live at the end of the block.
Mark them as not local to any one basic block. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_REG_SET (live, 0, i, rsi)
REG_BASIC_BLOCK (i) = REG_BLOCK_GLOBAL;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Scan the block an insn at a time from end to beginning. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
changed = 0;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for (insn = BB_END (bb); ; insn = prev)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is a call to `setjmp' et al, warn if any
non-volatile datum is live. */
if ((flags & PROP_REG_INFO)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& CALL_P (insn)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& find_reg_note (insn, REG_SETJMP, NULL))
IOR_REG_SET (regs_live_at_setjmp, pbi->reg_live);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
prev = propagate_one_insn (pbi, insn);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (!prev)
changed |= insn != get_insns ();
else
changed |= NEXT_INSN (prev) != insn;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (insn == BB_HEAD (bb))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#ifdef EH_RETURN_DATA_REGNO
if (bb_has_eh_pred (bb))
{
unsigned int i;
for (i = 0; ; ++i)
{
unsigned regno = EH_RETURN_DATA_REGNO (i);
if (regno == INVALID_REGNUM)
break;
if (pbi->local_set)
{
CLEAR_REGNO_REG_SET (pbi->cond_local_set, regno);
SET_REGNO_REG_SET (pbi->local_set, regno);
}
if (REGNO_REG_SET_P (pbi->reg_live, regno))
SET_REGNO_REG_SET (pbi->new_set, regno);
regs_ever_live[regno] = 1;
}
}
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free_propagate_block_info (pbi);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return changed;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return 1 if X (the body of an insn, or part of it) is just dead stores
(SET expressions whose destinations are registers dead after the insn).
NEEDED is the regset that says which regs are alive after the insn.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Unless CALL_OK is nonzero, an insn is needed if it contains a CALL.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
If X is the entire body of an insn, NOTES contains the reg notes
pertaining to the insn. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
insn_dead_p (struct propagate_block_info *pbi, rtx x, int call_ok,
rtx notes ATTRIBUTE_UNUSED)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
enum rtx_code code = GET_CODE (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Don't eliminate insns that may trap. */
if (flag_non_call_exceptions && may_trap_p (x))
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef AUTO_INC_DEC
/* As flow is invoked after combine, we must take existing AUTO_INC
expressions into account. */
for (; notes; notes = XEXP (notes, 1))
{
if (REG_NOTE_KIND (notes) == REG_INC)
{
int regno = REGNO (XEXP (notes, 0));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't delete insns to set global regs. */
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
|| REGNO_REG_SET_P (pbi->reg_live, regno))
return 0;
}
}
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If setting something that's a reg or part of one,
see if that register's altered value will be live. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (code == SET)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx r = SET_DEST (x);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#ifdef HAVE_cc0
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_CODE (r) == CC0)
return ! pbi->cc0_live;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A SET that is a subroutine call cannot be dead. */
if (GET_CODE (SET_SRC (x)) == CALL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! call_ok)
return 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't eliminate loads from volatile memory or volatile asms. */
else if (volatile_refs_p (SET_SRC (x)))
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (r))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx temp, canon_r;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (MEM_VOLATILE_P (r) || GET_MODE (r) == BLKmode)
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
canon_r = canon_rtx (r);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Walk the set of memory locations we are currently tracking
and see if one is an identical match to this memory location.
If so, this memory write is dead (remember, we're walking
backwards from the end of the block to the start). Since
rtx_equal_p does not check the alias set or flags, we also
must have the potential for them to conflict (anti_dependence). */
for (temp = pbi->mem_set_list; temp != 0; temp = XEXP (temp, 1))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (anti_dependence (r, XEXP (temp, 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx mem = XEXP (temp, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (rtx_equal_p (XEXP (canon_r, 0), XEXP (mem, 0))
&& (GET_MODE_SIZE (GET_MODE (canon_r))
<= GET_MODE_SIZE (GET_MODE (mem))))
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef AUTO_INC_DEC
/* Check if memory reference matches an auto increment. Only
post increment/decrement or modify are valid. */
if (GET_MODE (mem) == GET_MODE (r)
&& (GET_CODE (XEXP (mem, 0)) == POST_DEC
|| GET_CODE (XEXP (mem, 0)) == POST_INC
|| GET_CODE (XEXP (mem, 0)) == POST_MODIFY)
&& GET_MODE (XEXP (mem, 0)) == GET_MODE (r)
&& rtx_equal_p (XEXP (XEXP (mem, 0), 0), XEXP (r, 0)))
return 1;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
}
else
{
while (GET_CODE (r) == SUBREG
|| GET_CODE (r) == STRICT_LOW_PART
|| GET_CODE (r) == ZERO_EXTRACT)
r = XEXP (r, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (r))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
int regno = REGNO (r);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Obvious. */
if (REGNO_REG_SET_P (pbi->reg_live, regno))
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is a hard register, verify that subsequent
words are not needed. */
if (regno < FIRST_PSEUDO_REGISTER)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int n = hard_regno_nregs[regno][GET_MODE (r)];
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
while (--n > 0)
if (REGNO_REG_SET_P (pbi->reg_live, regno+n))
return 0;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't delete insns to set global regs. */
if (regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
return 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Make sure insns to set the stack pointer aren't deleted. */
if (regno == STACK_POINTER_REGNUM)
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* ??? These bits might be redundant with the force live bits
in calculate_global_regs_live. We would delete from
sequential sets; whether this actually affects real code
for anything but the stack pointer I don't know. */
/* Make sure insns to set the frame pointer aren't deleted. */
if (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
return 0;
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
if (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
return 0;
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
/* Make sure insns to set arg pointer are never deleted
(if the arg pointer isn't fixed, there will be a USE
for it, so we can treat it normally). */
if (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
return 0;
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Otherwise, the set is dead. */
return 1;
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If performing several activities, insn is dead if each activity
is individually dead. Also, CLOBBERs and USEs can be ignored; a
CLOBBER or USE that's inside a PARALLEL doesn't make the insn
worth keeping. */
else if (code == PARALLEL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i = XVECLEN (x, 0);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i--; i >= 0; i--)
if (GET_CODE (XVECEXP (x, 0, i)) != CLOBBER
&& GET_CODE (XVECEXP (x, 0, i)) != USE
&& ! insn_dead_p (pbi, XVECEXP (x, 0, i), call_ok, NULL_RTX))
return 0;
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A CLOBBER of a pseudo-register that is dead serves no purpose. That
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
is not necessarily true for hard registers until after reload. */
else if (code == CLOBBER)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (XEXP (x, 0))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& (REGNO (XEXP (x, 0)) >= FIRST_PSEUDO_REGISTER
|| reload_completed)
&& ! REGNO_REG_SET_P (pbi->reg_live, REGNO (XEXP (x, 0))))
return 1;
}
/* ??? A base USE is a historical relic. It ought not be needed anymore.
Instances where it is still used are either (1) temporary and the USE
escaped the pass, (2) cruft and the USE need not be emitted anymore,
or (3) hiding bugs elsewhere that are not properly representing data
flow. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If INSN is the last insn in a libcall, and assuming INSN is dead,
return 1 if the entire library call is dead.
This is true if INSN copies a register (hard or pseudo)
and if the hard return reg of the call insn is dead.
(The caller should have tested the destination of the SET inside
INSN already for death.)
If this insn doesn't just copy a register, then we don't
have an ordinary libcall. In that case, cse could not have
managed to substitute the source for the dest later on,
so we can assume the libcall is dead.
PBI is the block info giving pseudoregs live before this insn.
NOTE is the REG_RETVAL note of the insn. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
libcall_dead_p (struct propagate_block_info *pbi, rtx note, rtx insn)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx x = single_set (insn);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (x)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx r = SET_SRC (x);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (r) || GET_CODE (r) == SUBREG)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx call = XEXP (note, 0);
rtx call_pat;
int i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Find the call insn. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
while (call != insn && !CALL_P (call))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
call = NEXT_INSN (call);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If there is none, do nothing special,
since ordinary death handling can understand these insns. */
if (call == insn)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* See if the hard reg holding the value is dead.
If this is a PARALLEL, find the call within it. */
call_pat = PATTERN (call);
if (GET_CODE (call_pat) == PARALLEL)
{
for (i = XVECLEN (call_pat, 0) - 1; i >= 0; i--)
if (GET_CODE (XVECEXP (call_pat, 0, i)) == SET
&& GET_CODE (SET_SRC (XVECEXP (call_pat, 0, i))) == CALL)
break;
/* This may be a library call that is returning a value
via invisible pointer. Do nothing special, since
ordinary death handling can understand these insns. */
if (i < 0)
return 0;
call_pat = XVECEXP (call_pat, 0, i);
}
Gcc 3.4.4 release.
2005-06-03 03:28:44 +00:00
if (! insn_dead_p (pbi, call_pat, 1, REG_NOTES (call)))
return 0;
while ((insn = PREV_INSN (insn)) != call)
{
if (! INSN_P (insn))
continue;
if (! insn_dead_p (pbi, PATTERN (insn), 0, REG_NOTES (insn)))
return 0;
}
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Gcc 3.4.4 release.
2005-06-03 03:28:44 +00:00
return 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* 1 if register REGNO was alive at a place where `setjmp' was called
and was set more than once or is an argument.
Such regs may be clobbered by `longjmp'. */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
regno_clobbered_at_setjmp (int regno)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (n_basic_blocks == NUM_FIXED_BLOCKS)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
return ((REG_N_SETS (regno) > 1
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| REGNO_REG_SET_P (ENTRY_BLOCK_PTR->il.rtl->global_live_at_end,
regno))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& REGNO_REG_SET_P (regs_live_at_setjmp, regno));
}
/* Add MEM to PBI->MEM_SET_LIST. MEM should be canonical. Respect the
maximal list size; look for overlaps in mode and select the largest. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
add_to_mem_set_list (struct propagate_block_info *pbi, rtx mem)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx i;
/* We don't know how large a BLKmode store is, so we must not
take them into consideration. */
if (GET_MODE (mem) == BLKmode)
return;
for (i = pbi->mem_set_list; i ; i = XEXP (i, 1))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx e = XEXP (i, 0);
if (rtx_equal_p (XEXP (mem, 0), XEXP (e, 0)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_MODE_SIZE (GET_MODE (mem)) > GET_MODE_SIZE (GET_MODE (e)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef AUTO_INC_DEC
/* If we must store a copy of the mem, we can just modify
the mode of the stored copy. */
if (pbi->flags & PROP_AUTOINC)
PUT_MODE (e, GET_MODE (mem));
else
#endif
XEXP (i, 0) = mem;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (pbi->mem_set_list_len < PARAM_VALUE (PARAM_MAX_FLOW_MEMORY_LOCATIONS))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
#ifdef AUTO_INC_DEC
/* Store a copy of mem, otherwise the address may be
scrogged by find_auto_inc. */
if (pbi->flags & PROP_AUTOINC)
mem = shallow_copy_rtx (mem);
#endif
pbi->mem_set_list = alloc_EXPR_LIST (0, mem, pbi->mem_set_list);
pbi->mem_set_list_len++;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* INSN references memory, possibly using autoincrement addressing modes.
Find any entries on the mem_set_list that need to be invalidated due
to an address change. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
invalidate_mems_from_autoinc (rtx *px, void *data)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
rtx x = *px;
struct propagate_block_info *pbi = data;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (GET_RTX_CLASS (GET_CODE (x)) == RTX_AUTOINC)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
invalidate_mems_from_set (pbi, XEXP (x, 0));
return -1;
}
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* EXP is a REG or MEM. Remove any dependent entries from
pbi->mem_set_list. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
invalidate_mems_from_set (struct propagate_block_info *pbi, rtx exp)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx temp = pbi->mem_set_list;
rtx prev = NULL_RTX;
rtx next;
while (temp)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
next = XEXP (temp, 1);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if ((REG_P (exp) && reg_overlap_mentioned_p (exp, XEXP (temp, 0)))
/* When we get an EXP that is a mem here, we want to check if EXP
overlaps the *address* of any of the mems in the list (i.e. not
whether the mems actually overlap; that's done elsewhere). */
|| (MEM_P (exp)
&& reg_overlap_mentioned_p (exp, XEXP (XEXP (temp, 0), 0))))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* Splice this entry out of the list. */
if (prev)
XEXP (prev, 1) = next;
else
pbi->mem_set_list = next;
free_EXPR_LIST_node (temp);
pbi->mem_set_list_len--;
}
else
prev = temp;
temp = next;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Process the registers that are set within X. Their bits are set to
1 in the regset DEAD, because they are dead prior to this insn.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
If INSN is nonzero, it is the insn being processed.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
FLAGS is the set of operations to perform. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_set_regs (struct propagate_block_info *pbi, rtx x, rtx insn)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx cond = NULL_RTX;
rtx link;
enum rtx_code code;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
int flags = pbi->flags;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (insn)
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
{
if (REG_NOTE_KIND (link) == REG_INC)
mark_set_1 (pbi, SET, XEXP (link, 0),
(GET_CODE (x) == COND_EXEC
? COND_EXEC_TEST (x) : NULL_RTX),
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
insn, flags);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
retry:
switch (code = GET_CODE (x))
{
case SET:
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (GET_CODE (XEXP (x, 1)) == ASM_OPERANDS)
flags |= PROP_ASM_SCAN;
/* Fall through */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case CLOBBER:
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_set_1 (pbi, code, SET_DEST (x), cond, insn, flags);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case COND_EXEC:
cond = COND_EXEC_TEST (x);
x = COND_EXEC_CODE (x);
goto retry;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case PARALLEL:
{
int i;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* We must scan forwards. If we have an asm, we need to set
the PROP_ASM_SCAN flag before scanning the clobbers. */
for (i = 0; i < XVECLEN (x, 0); i++)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx sub = XVECEXP (x, 0, i);
switch (code = GET_CODE (sub))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case COND_EXEC:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (!cond);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
cond = COND_EXEC_TEST (sub);
sub = COND_EXEC_CODE (sub);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (GET_CODE (sub) == SET)
goto mark_set;
if (GET_CODE (sub) == CLOBBER)
goto mark_clob;
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SET:
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_set:
if (GET_CODE (XEXP (sub, 1)) == ASM_OPERANDS)
flags |= PROP_ASM_SCAN;
/* Fall through */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case CLOBBER:
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_clob:
mark_set_1 (pbi, code, SET_DEST (sub), cond, insn, flags);
break;
case ASM_OPERANDS:
flags |= PROP_ASM_SCAN;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
default:
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
break;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default:
break;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Process a single set, which appears in INSN. REG (which may not
actually be a REG, it may also be a SUBREG, PARALLEL, etc.) is
being set using the CODE (which may be SET, CLOBBER, or COND_EXEC).
If the set is conditional (because it appear in a COND_EXEC), COND
will be the condition. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_set_1 (struct propagate_block_info *pbi, enum rtx_code code, rtx reg, rtx cond, rtx insn, int flags)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int regno_first = -1, regno_last = -1;
unsigned long not_dead = 0;
int i;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Modifying just one hardware register of a multi-reg value or just a
byte field of a register does not mean the value from before this insn
is now dead. Of course, if it was dead after it's unused now. */
switch (GET_CODE (reg))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case PARALLEL:
/* Some targets place small structures in registers for return values of
functions. We have to detect this case specially here to get correct
flow information. */
for (i = XVECLEN (reg, 0) - 1; i >= 0; i--)
if (XEXP (XVECEXP (reg, 0, i), 0) != 0)
mark_set_1 (pbi, code, XEXP (XVECEXP (reg, 0, i), 0), cond, insn,
flags);
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SIGN_EXTRACT:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* SIGN_EXTRACT cannot be an lvalue. */
gcc_unreachable ();
case ZERO_EXTRACT:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case STRICT_LOW_PART:
/* ??? Assumes STRICT_LOW_PART not used on multi-word registers. */
do
reg = XEXP (reg, 0);
while (GET_CODE (reg) == SUBREG
|| GET_CODE (reg) == ZERO_EXTRACT
|| GET_CODE (reg) == STRICT_LOW_PART);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (reg))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
not_dead = (unsigned long) REGNO_REG_SET_P (pbi->reg_live, REGNO (reg));
/* Fall through. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case REG:
regno_last = regno_first = REGNO (reg);
if (regno_first < FIRST_PSEUDO_REGISTER)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regno_last += hard_regno_nregs[regno_first][GET_MODE (reg)] - 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
case SUBREG:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (SUBREG_REG (reg)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
enum machine_mode outer_mode = GET_MODE (reg);
enum machine_mode inner_mode = GET_MODE (SUBREG_REG (reg));
/* Identify the range of registers affected. This is moderately
tricky for hard registers. See alter_subreg. */
regno_last = regno_first = REGNO (SUBREG_REG (reg));
if (regno_first < FIRST_PSEUDO_REGISTER)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
regno_first += subreg_regno_offset (regno_first, inner_mode,
SUBREG_BYTE (reg),
outer_mode);
regno_last = (regno_first
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
+ hard_regno_nregs[regno_first][outer_mode] - 1);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Since we've just adjusted the register number ranges, make
sure REG matches. Otherwise some_was_live will be clear
when it shouldn't have been, and we'll create incorrect
REG_UNUSED notes. */
reg = gen_rtx_REG (outer_mode, regno_first);
}
else
{
/* If the number of words in the subreg is less than the number
of words in the full register, we have a well-defined partial
set. Otherwise the high bits are undefined.
This is only really applicable to pseudos, since we just took
care of multi-word hard registers. */
if (((GET_MODE_SIZE (outer_mode)
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
< ((GET_MODE_SIZE (inner_mode)
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD))
not_dead = (unsigned long) REGNO_REG_SET_P (pbi->reg_live,
regno_first);
reg = SUBREG_REG (reg);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
reg = SUBREG_REG (reg);
break;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
default:
break;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If this set is a MEM, then it kills any aliased writes and any
other MEMs which use it.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
If this set is a REG, then it kills any MEMs which use the reg. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (optimize && (flags & PROP_SCAN_DEAD_STORES))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (reg) || MEM_P (reg))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
invalidate_mems_from_set (pbi, reg);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If the memory reference had embedded side effects (autoincrement
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
address modes) then we may need to kill some entries on the
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
memory set list. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (insn && MEM_P (reg))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
for_each_rtx (&PATTERN (insn), invalidate_mems_from_autoinc, pbi);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (reg) && ! side_effects_p (reg)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* ??? With more effort we could track conditional memory life. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& ! cond)
add_to_mem_set_list (pbi, canon_rtx (reg));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (reg)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& ! (regno_first == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
&& ! (regno_first == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (regno_first == ARG_POINTER_REGNUM && fixed_regs[regno_first])
#endif
)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int some_was_live = 0, some_was_dead = 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = regno_first; i <= regno_last; ++i)
{
int needed_regno = REGNO_REG_SET_P (pbi->reg_live, i);
if (pbi->local_set)
{
/* Order of the set operation matters here since both
sets may be the same. */
CLEAR_REGNO_REG_SET (pbi->cond_local_set, i);
if (cond != NULL_RTX
&& ! REGNO_REG_SET_P (pbi->local_set, i))
SET_REGNO_REG_SET (pbi->cond_local_set, i);
else
SET_REGNO_REG_SET (pbi->local_set, i);
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (code != CLOBBER || needed_regno)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_REGNO_REG_SET (pbi->new_set, i);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
some_was_live |= needed_regno;
some_was_dead |= ! needed_regno;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
/* Consider conditional death in deciding that the register needs
a death note. */
if (some_was_live && ! not_dead
/* The stack pointer is never dead. Well, not strictly true,
but it's very difficult to tell from here. Hopefully
combine_stack_adjustments will fix up the most egregious
errors. */
&& regno_first != STACK_POINTER_REGNUM)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = regno_first; i <= regno_last; ++i)
if (! mark_regno_cond_dead (pbi, i, cond))
not_dead |= ((unsigned long) 1) << (i - regno_first);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Additional data to record if this is the final pass. */
if (flags & (PROP_LOG_LINKS | PROP_REG_INFO
| PROP_DEATH_NOTES | PROP_AUTOINC))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx y;
int blocknum = pbi->bb->index;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
y = NULL_RTX;
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
{
y = pbi->reg_next_use[regno_first];
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* The next use is no longer next, since a store intervenes. */
for (i = regno_first; i <= regno_last; ++i)
pbi->reg_next_use[i] = 0;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (flags & PROP_REG_INFO)
{
for (i = regno_first; i <= regno_last; ++i)
{
/* Count (weighted) references, stores, etc. This counts a
register twice if it is modified, but that is correct. */
REG_N_SETS (i) += 1;
REG_N_REFS (i) += 1;
REG_FREQ (i) += REG_FREQ_FROM_BB (pbi->bb);
/* The insns where a reg is live are normally counted
elsewhere, but we want the count to include the insn
where the reg is set, and the normal counting mechanism
would not count it. */
REG_LIVE_LENGTH (i) += 1;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is a hard reg, record this function uses the reg. */
if (regno_first < FIRST_PSEUDO_REGISTER)
{
for (i = regno_first; i <= regno_last; i++)
regs_ever_live[i] = 1;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (flags & PROP_ASM_SCAN)
for (i = regno_first; i <= regno_last; i++)
regs_asm_clobbered[i] = 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
else
{
/* Keep track of which basic blocks each reg appears in. */
if (REG_BASIC_BLOCK (regno_first) == REG_BLOCK_UNKNOWN)
REG_BASIC_BLOCK (regno_first) = blocknum;
else if (REG_BASIC_BLOCK (regno_first) != blocknum)
REG_BASIC_BLOCK (regno_first) = REG_BLOCK_GLOBAL;
}
}
if (! some_was_dead)
{
if (flags & PROP_LOG_LINKS)
{
/* Make a logical link from the next following insn
that uses this register, back to this insn.
The following insns have already been processed.
We don't build a LOG_LINK for hard registers containing
in ASM_OPERANDs. If these registers get replaced,
we might wind up changing the semantics of the insn,
even if reload can make what appear to be valid
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
assignments later.
We don't build a LOG_LINK for global registers to
or from a function call. We don't want to let
combine think that it knows what is going on with
global registers. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (y && (BLOCK_NUM (y) == blocknum)
&& (regno_first >= FIRST_PSEUDO_REGISTER
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
|| (asm_noperands (PATTERN (y)) < 0
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& ! ((CALL_P (insn)
|| CALL_P (y))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& global_regs[regno_first]))))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
LOG_LINKS (y) = alloc_INSN_LIST (insn, LOG_LINKS (y));
}
}
else if (not_dead)
;
else if (! some_was_live)
{
if (flags & PROP_REG_INFO)
REG_N_DEATHS (regno_first) += 1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (flags & PROP_DEATH_NOTES
#ifdef STACK_REGS
&& (!(flags & PROP_POST_REGSTACK)
|| !IN_RANGE (REGNO (reg), FIRST_STACK_REG,
LAST_STACK_REG))
#endif
)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* Note that dead stores have already been deleted
when possible. If we get here, we have found a
dead store that cannot be eliminated (because the
same insn does something useful). Indicate this
by marking the reg being set as dying here. */
REG_NOTES (insn)
= alloc_EXPR_LIST (REG_UNUSED, reg, REG_NOTES (insn));
}
}
else
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (flags & PROP_DEATH_NOTES
#ifdef STACK_REGS
&& (!(flags & PROP_POST_REGSTACK)
|| !IN_RANGE (REGNO (reg), FIRST_STACK_REG,
LAST_STACK_REG))
#endif
)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* This is a case where we have a multi-word hard register
and some, but not all, of the words of the register are
needed in subsequent insns. Write REG_UNUSED notes
for those parts that were not needed. This case should
be rare. */
for (i = regno_first; i <= regno_last; ++i)
if (! REGNO_REG_SET_P (pbi->reg_live, i))
REG_NOTES (insn)
= alloc_EXPR_LIST (REG_UNUSED,
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
regno_reg_rtx[i],
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_NOTES (insn));
}
}
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark the register as being dead. */
if (some_was_live
/* The stack pointer is never dead. Well, not strictly true,
but it's very difficult to tell from here. Hopefully
combine_stack_adjustments will fix up the most egregious
errors. */
&& regno_first != STACK_POINTER_REGNUM)
{
for (i = regno_first; i <= regno_last; ++i)
if (!(not_dead & (((unsigned long) 1) << (i - regno_first))))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
if ((pbi->flags & PROP_REG_INFO)
&& REGNO_REG_SET_P (pbi->reg_live, i))
{
REG_LIVE_LENGTH (i) += pbi->insn_num - reg_deaths[i];
reg_deaths[i] = 0;
}
CLEAR_REGNO_REG_SET (pbi->reg_live, i);
}
if (flags & PROP_DEAD_INSN)
emit_insn_after (gen_rtx_CLOBBER (VOIDmode, reg), insn);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else if (REG_P (reg))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
pbi->reg_next_use[regno_first] = 0;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if ((flags & PROP_REG_INFO) != 0
&& (flags & PROP_ASM_SCAN) != 0
&& regno_first < FIRST_PSEUDO_REGISTER)
{
for (i = regno_first; i <= regno_last; i++)
regs_asm_clobbered[i] = 1;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is the last pass and this is a SCRATCH, show it will be dying
here and count it. */
else if (GET_CODE (reg) == SCRATCH)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (flags & PROP_DEATH_NOTES
#ifdef STACK_REGS
&& (!(flags & PROP_POST_REGSTACK)
|| !IN_RANGE (REGNO (reg), FIRST_STACK_REG, LAST_STACK_REG))
#endif
)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_NOTES (insn)
= alloc_EXPR_LIST (REG_UNUSED, reg, REG_NOTES (insn));
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
/* Mark REGNO conditionally dead.
Return true if the register is now unconditionally dead. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_regno_cond_dead (struct propagate_block_info *pbi, int regno, rtx cond)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is a store to a predicate register, the value of the
predicate is changing, we don't know that the predicate as seen
before is the same as that seen after. Flush all dependent
conditions from reg_cond_dead. This will make all such
conditionally live registers unconditionally live. */
if (REGNO_REG_SET_P (pbi->reg_cond_reg, regno))
flush_reg_cond_reg (pbi, regno);
/* If this is an unconditional store, remove any conditional
life that may have existed. */
if (cond == NULL_RTX)
splay_tree_remove (pbi->reg_cond_dead, regno);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
splay_tree_node node;
struct reg_cond_life_info *rcli;
rtx ncond;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Otherwise this is a conditional set. Record that fact.
It may have been conditionally used, or there may be a
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
subsequent set with a complementary condition. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
node = splay_tree_lookup (pbi->reg_cond_dead, regno);
if (node == NULL)
{
/* The register was unconditionally live previously.
Record the current condition as the condition under
which it is dead. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rcli = XNEW (struct reg_cond_life_info);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rcli->condition = cond;
rcli->stores = cond;
rcli->orig_condition = const0_rtx;
splay_tree_insert (pbi->reg_cond_dead, regno,
(splay_tree_value) rcli);
SET_REGNO_REG_SET (pbi->reg_cond_reg, REGNO (XEXP (cond, 0)));
/* Not unconditionally dead. */
return 0;
}
else
{
/* The register was conditionally live previously.
Add the new condition to the old. */
rcli = (struct reg_cond_life_info *) node->value;
ncond = rcli->condition;
ncond = ior_reg_cond (ncond, cond, 1);
if (rcli->stores == const0_rtx)
rcli->stores = cond;
else if (rcli->stores != const1_rtx)
rcli->stores = ior_reg_cond (rcli->stores, cond, 1);
/* If the register is now unconditionally dead, remove the entry
in the splay_tree. A register is unconditionally dead if the
dead condition ncond is true. A register is also unconditionally
dead if the sum of all conditional stores is an unconditional
store (stores is true), and the dead condition is identically the
same as the original dead condition initialized at the end of
the block. This is a pointer compare, not an rtx_equal_p
compare. */
if (ncond == const1_rtx
|| (ncond == rcli->orig_condition && rcli->stores == const1_rtx))
splay_tree_remove (pbi->reg_cond_dead, regno);
else
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rcli->condition = ncond;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_REGNO_REG_SET (pbi->reg_cond_reg, REGNO (XEXP (cond, 0)));
/* Not unconditionally dead. */
return 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 1;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Called from splay_tree_delete for pbi->reg_cond_life. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
free_reg_cond_life_info (splay_tree_value value)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
struct reg_cond_life_info *rcli = (struct reg_cond_life_info *) value;
free (rcli);
}
/* Helper function for flush_reg_cond_reg. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
flush_reg_cond_reg_1 (splay_tree_node node, void *data)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
struct reg_cond_life_info *rcli;
int *xdata = (int *) data;
unsigned int regno = xdata[0];
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't need to search if last flushed value was farther on in
the in-order traversal. */
if (xdata[1] >= (int) node->key)
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Splice out portions of the expression that refer to regno. */
rcli = (struct reg_cond_life_info *) node->value;
rcli->condition = elim_reg_cond (rcli->condition, regno);
if (rcli->stores != const0_rtx && rcli->stores != const1_rtx)
rcli->stores = elim_reg_cond (rcli->stores, regno);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If the entire condition is now false, signal the node to be removed. */
if (rcli->condition == const0_rtx)
{
xdata[1] = node->key;
return -1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else
gcc_assert (rcli->condition != const1_rtx);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Flush all (sub) expressions referring to REGNO from REG_COND_LIVE. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
flush_reg_cond_reg (struct propagate_block_info *pbi, int regno)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
int pair[2];
pair[0] = regno;
pair[1] = -1;
while (splay_tree_foreach (pbi->reg_cond_dead,
flush_reg_cond_reg_1, pair) == -1)
splay_tree_remove (pbi->reg_cond_dead, pair[1]);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
CLEAR_REGNO_REG_SET (pbi->reg_cond_reg, regno);
}
/* Logical arithmetic on predicate conditions. IOR, NOT and AND.
For ior/and, the ADD flag determines whether we want to add the new
condition X to the old one unconditionally. If it is zero, we will
only return a new expression if X allows us to simplify part of
OLD, otherwise we return NULL to the caller.
If ADD is nonzero, we will return a new condition in all cases. The
toplevel caller of one of these functions should always pass 1 for
ADD. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
ior_reg_cond (rtx old, rtx x, int add)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx op0, op1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (COMPARISON_P (old))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (COMPARISON_P (x)
&& REVERSE_CONDEXEC_PREDICATES_P (x, old)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& REGNO (XEXP (x, 0)) == REGNO (XEXP (old, 0)))
return const1_rtx;
if (GET_CODE (x) == GET_CODE (old)
&& REGNO (XEXP (x, 0)) == REGNO (XEXP (old, 0)))
return old;
if (! add)
return NULL;
return gen_rtx_IOR (0, old, x);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
switch (GET_CODE (old))
{
case IOR:
op0 = ior_reg_cond (XEXP (old, 0), x, 0);
op1 = ior_reg_cond (XEXP (old, 1), x, 0);
if (op0 != NULL || op1 != NULL)
{
if (op0 == const0_rtx)
return op1 ? op1 : gen_rtx_IOR (0, XEXP (old, 1), x);
if (op1 == const0_rtx)
return op0 ? op0 : gen_rtx_IOR (0, XEXP (old, 0), x);
if (op0 == const1_rtx || op1 == const1_rtx)
return const1_rtx;
if (op0 == NULL)
op0 = gen_rtx_IOR (0, XEXP (old, 0), x);
else if (rtx_equal_p (x, op0))
/* (x | A) | x ~ (x | A). */
return old;
if (op1 == NULL)
op1 = gen_rtx_IOR (0, XEXP (old, 1), x);
else if (rtx_equal_p (x, op1))
/* (A | x) | x ~ (A | x). */
return old;
return gen_rtx_IOR (0, op0, op1);
}
if (! add)
return NULL;
return gen_rtx_IOR (0, old, x);
case AND:
op0 = ior_reg_cond (XEXP (old, 0), x, 0);
op1 = ior_reg_cond (XEXP (old, 1), x, 0);
if (op0 != NULL || op1 != NULL)
{
if (op0 == const1_rtx)
return op1 ? op1 : gen_rtx_IOR (0, XEXP (old, 1), x);
if (op1 == const1_rtx)
return op0 ? op0 : gen_rtx_IOR (0, XEXP (old, 0), x);
if (op0 == const0_rtx || op1 == const0_rtx)
return const0_rtx;
if (op0 == NULL)
op0 = gen_rtx_IOR (0, XEXP (old, 0), x);
else if (rtx_equal_p (x, op0))
/* (x & A) | x ~ x. */
return op0;
if (op1 == NULL)
op1 = gen_rtx_IOR (0, XEXP (old, 1), x);
else if (rtx_equal_p (x, op1))
/* (A & x) | x ~ x. */
return op1;
return gen_rtx_AND (0, op0, op1);
}
if (! add)
return NULL;
return gen_rtx_IOR (0, old, x);
case NOT:
op0 = and_reg_cond (XEXP (old, 0), not_reg_cond (x), 0);
if (op0 != NULL)
return not_reg_cond (op0);
if (! add)
return NULL;
return gen_rtx_IOR (0, old, x);
default:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_unreachable ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
not_reg_cond (rtx x)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
if (x == const0_rtx)
return const1_rtx;
else if (x == const1_rtx)
return const0_rtx;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (GET_CODE (x) == NOT)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return XEXP (x, 0);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (COMPARISON_P (x)
&& REG_P (XEXP (x, 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (XEXP (x, 1) == const0_rtx);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return gen_rtx_fmt_ee (reversed_comparison_code (x, NULL),
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
VOIDmode, XEXP (x, 0), const0_rtx);
}
return gen_rtx_NOT (0, x);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
and_reg_cond (rtx old, rtx x, int add)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx op0, op1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (COMPARISON_P (old))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (COMPARISON_P (x)
&& GET_CODE (x) == reversed_comparison_code (old, NULL)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& REGNO (XEXP (x, 0)) == REGNO (XEXP (old, 0)))
return const0_rtx;
if (GET_CODE (x) == GET_CODE (old)
&& REGNO (XEXP (x, 0)) == REGNO (XEXP (old, 0)))
return old;
if (! add)
return NULL;
return gen_rtx_AND (0, old, x);
}
switch (GET_CODE (old))
{
case IOR:
op0 = and_reg_cond (XEXP (old, 0), x, 0);
op1 = and_reg_cond (XEXP (old, 1), x, 0);
if (op0 != NULL || op1 != NULL)
{
if (op0 == const0_rtx)
return op1 ? op1 : gen_rtx_AND (0, XEXP (old, 1), x);
if (op1 == const0_rtx)
return op0 ? op0 : gen_rtx_AND (0, XEXP (old, 0), x);
if (op0 == const1_rtx || op1 == const1_rtx)
return const1_rtx;
if (op0 == NULL)
op0 = gen_rtx_AND (0, XEXP (old, 0), x);
else if (rtx_equal_p (x, op0))
/* (x | A) & x ~ x. */
return op0;
if (op1 == NULL)
op1 = gen_rtx_AND (0, XEXP (old, 1), x);
else if (rtx_equal_p (x, op1))
/* (A | x) & x ~ x. */
return op1;
return gen_rtx_IOR (0, op0, op1);
}
if (! add)
return NULL;
return gen_rtx_AND (0, old, x);
case AND:
op0 = and_reg_cond (XEXP (old, 0), x, 0);
op1 = and_reg_cond (XEXP (old, 1), x, 0);
if (op0 != NULL || op1 != NULL)
{
if (op0 == const1_rtx)
return op1 ? op1 : gen_rtx_AND (0, XEXP (old, 1), x);
if (op1 == const1_rtx)
return op0 ? op0 : gen_rtx_AND (0, XEXP (old, 0), x);
if (op0 == const0_rtx || op1 == const0_rtx)
return const0_rtx;
if (op0 == NULL)
op0 = gen_rtx_AND (0, XEXP (old, 0), x);
else if (rtx_equal_p (x, op0))
/* (x & A) & x ~ (x & A). */
return old;
if (op1 == NULL)
op1 = gen_rtx_AND (0, XEXP (old, 1), x);
else if (rtx_equal_p (x, op1))
/* (A & x) & x ~ (A & x). */
return old;
return gen_rtx_AND (0, op0, op1);
}
if (! add)
return NULL;
return gen_rtx_AND (0, old, x);
case NOT:
op0 = ior_reg_cond (XEXP (old, 0), not_reg_cond (x), 0);
if (op0 != NULL)
return not_reg_cond (op0);
if (! add)
return NULL;
return gen_rtx_AND (0, old, x);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
default:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_unreachable ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Given a condition X, remove references to reg REGNO and return the
new condition. The removal will be done so that all conditions
involving REGNO are considered to evaluate to false. This function
is used when the value of REGNO changes. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
elim_reg_cond (rtx x, unsigned int regno)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx op0, op1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (COMPARISON_P (x))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (REGNO (XEXP (x, 0)) == regno)
return const0_rtx;
return x;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
switch (GET_CODE (x))
{
case AND:
op0 = elim_reg_cond (XEXP (x, 0), regno);
op1 = elim_reg_cond (XEXP (x, 1), regno);
if (op0 == const0_rtx || op1 == const0_rtx)
return const0_rtx;
if (op0 == const1_rtx)
return op1;
if (op1 == const1_rtx)
return op0;
if (op0 == XEXP (x, 0) && op1 == XEXP (x, 1))
return x;
return gen_rtx_AND (0, op0, op1);
case IOR:
op0 = elim_reg_cond (XEXP (x, 0), regno);
op1 = elim_reg_cond (XEXP (x, 1), regno);
if (op0 == const1_rtx || op1 == const1_rtx)
return const1_rtx;
if (op0 == const0_rtx)
return op1;
if (op1 == const0_rtx)
return op0;
if (op0 == XEXP (x, 0) && op1 == XEXP (x, 1))
return x;
return gen_rtx_IOR (0, op0, op1);
case NOT:
op0 = elim_reg_cond (XEXP (x, 0), regno);
if (op0 == const0_rtx)
return const1_rtx;
if (op0 == const1_rtx)
return const0_rtx;
if (op0 != XEXP (x, 0))
return not_reg_cond (op0);
return x;
default:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_unreachable ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif /* HAVE_conditional_execution */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef AUTO_INC_DEC
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Try to substitute the auto-inc expression INC as the address inside
MEM which occurs in INSN. Currently, the address of MEM is an expression
involving INCR_REG, and INCR is the next use of INCR_REG; it is an insn
that has a single set whose source is a PLUS of INCR_REG and something
else. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
attempt_auto_inc (struct propagate_block_info *pbi, rtx inc, rtx insn,
rtx mem, rtx incr, rtx incr_reg)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int regno = REGNO (incr_reg);
rtx set = single_set (incr);
rtx q = SET_DEST (set);
rtx y = SET_SRC (set);
int opnum = XEXP (y, 0) == incr_reg ? 0 : 1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int changed;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Make sure this reg appears only once in this insn. */
if (count_occurrences (PATTERN (insn), incr_reg, 1) != 1)
return;
if (dead_or_set_p (incr, incr_reg)
/* Mustn't autoinc an eliminable register. */
&& (regno >= FIRST_PSEUDO_REGISTER
|| ! TEST_HARD_REG_BIT (elim_reg_set, regno)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* This is the simple case. Try to make the auto-inc. If
we can't, we are done. Otherwise, we will do any
needed updates below. */
if (! validate_change (insn, &XEXP (mem, 0), inc, 0))
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else if (REG_P (q)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* PREV_INSN used here to check the semi-open interval
[insn,incr). */
&& ! reg_used_between_p (q, PREV_INSN (insn), incr)
/* We must also check for sets of q as q may be
a call clobbered hard register and there may
be a call between PREV_INSN (insn) and incr. */
&& ! reg_set_between_p (q, PREV_INSN (insn), incr))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We have *p followed sometime later by q = p+size.
Both p and q must be live afterward,
and q is not used between INSN and its assignment.
Change it to q = p, ...*q..., q = q+size.
Then fall into the usual case. */
rtx insns, temp;
start_sequence ();
emit_move_insn (q, incr_reg);
insns = get_insns ();
end_sequence ();
/* If we can't make the auto-inc, or can't make the
replacement into Y, exit. There's no point in making
the change below if we can't do the auto-inc and doing
so is not correct in the pre-inc case. */
XEXP (inc, 0) = q;
validate_change (insn, &XEXP (mem, 0), inc, 1);
validate_change (incr, &XEXP (y, opnum), q, 1);
if (! apply_change_group ())
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We now know we'll be doing this change, so emit the
new insn(s) and do the updates. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
emit_insn_before (insns, insn);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (BB_HEAD (pbi->bb) == insn)
BB_HEAD (pbi->bb) = insns;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* INCR will become a NOTE and INSN won't contain a
use of INCR_REG. If a use of INCR_REG was just placed in
the insn before INSN, make that the next use.
Otherwise, invalidate it. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (NONJUMP_INSN_P (PREV_INSN (insn))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& GET_CODE (PATTERN (PREV_INSN (insn))) == SET
&& SET_SRC (PATTERN (PREV_INSN (insn))) == incr_reg)
pbi->reg_next_use[regno] = PREV_INSN (insn);
else
pbi->reg_next_use[regno] = 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
incr_reg = q;
regno = REGNO (q);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if ((pbi->flags & PROP_REG_INFO)
&& !REGNO_REG_SET_P (pbi->reg_live, regno))
reg_deaths[regno] = pbi->insn_num;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* REGNO is now used in INCR which is below INSN, but
it previously wasn't live here. If we don't mark
it as live, we'll put a REG_DEAD note for it
on this insn, which is incorrect. */
SET_REGNO_REG_SET (pbi->reg_live, regno);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If there are any calls between INSN and INCR, show
that REGNO now crosses them. */
for (temp = insn; temp != incr; temp = NEXT_INSN (temp))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (CALL_P (temp))
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
{
REG_N_CALLS_CROSSED (regno)++;
if (can_throw_internal (temp))
REG_N_THROWING_CALLS_CROSSED (regno)++;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Invalidate alias info for Q since we just changed its value. */
clear_reg_alias_info (q);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If we haven't returned, it means we were able to make the
auto-inc, so update the status. First, record that this insn
has an implicit side effect. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_NOTES (insn) = alloc_EXPR_LIST (REG_INC, incr_reg, REG_NOTES (insn));
/* Modify the old increment-insn to simply copy
the already-incremented value of our register. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
changed = validate_change (incr, &SET_SRC (set), incr_reg, 0);
gcc_assert (changed);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If that makes it a no-op (copying the register into itself) delete
it so it won't appear to be a "use" and a "set" of this
register. */
if (REGNO (SET_DEST (set)) == REGNO (incr_reg))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If the original source was dead, it's dead now. */
rtx note;
while ((note = find_reg_note (incr, REG_DEAD, NULL_RTX)) != NULL_RTX)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
remove_note (incr, note);
if (XEXP (note, 0) != incr_reg)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
unsigned int regno = REGNO (XEXP (note, 0));
if ((pbi->flags & PROP_REG_INFO)
&& REGNO_REG_SET_P (pbi->reg_live, regno))
{
REG_LIVE_LENGTH (regno) += pbi->insn_num - reg_deaths[regno];
reg_deaths[regno] = 0;
}
CLEAR_REGNO_REG_SET (pbi->reg_live, REGNO (XEXP (note, 0)));
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
SET_INSN_DELETED (incr);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
if (regno >= FIRST_PSEUDO_REGISTER)
{
/* Count an extra reference to the reg. When a reg is
incremented, spilling it is worse, so we want to make
that less likely. */
REG_FREQ (regno) += REG_FREQ_FROM_BB (pbi->bb);
/* Count the increment as a setting of the register,
even though it isn't a SET in rtl. */
REG_N_SETS (regno)++;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* X is a MEM found in INSN. See if we can convert it into an auto-increment
reference. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_auto_inc (struct propagate_block_info *pbi, rtx x, rtx insn)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx addr = XEXP (x, 0);
HOST_WIDE_INT offset = 0;
rtx set, y, incr, inc_val;
int regno;
int size = GET_MODE_SIZE (GET_MODE (x));
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (JUMP_P (insn))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return;
/* Here we detect use of an index register which might be good for
postincrement, postdecrement, preincrement, or predecrement. */
if (GET_CODE (addr) == PLUS && GET_CODE (XEXP (addr, 1)) == CONST_INT)
offset = INTVAL (XEXP (addr, 1)), addr = XEXP (addr, 0);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!REG_P (addr))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
regno = REGNO (addr);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Is the next use an increment that might make auto-increment? */
incr = pbi->reg_next_use[regno];
if (incr == 0 || BLOCK_NUM (incr) != BLOCK_NUM (insn))
return;
set = single_set (incr);
if (set == 0 || GET_CODE (set) != SET)
return;
y = SET_SRC (set);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_CODE (y) != PLUS)
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (REG_P (XEXP (y, 0)) && REGNO (XEXP (y, 0)) == REGNO (addr))
inc_val = XEXP (y, 1);
else if (REG_P (XEXP (y, 1)) && REGNO (XEXP (y, 1)) == REGNO (addr))
inc_val = XEXP (y, 0);
else
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_CODE (inc_val) == CONST_INT)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (HAVE_POST_INCREMENT
&& (INTVAL (inc_val) == size && offset == 0))
attempt_auto_inc (pbi, gen_rtx_POST_INC (Pmode, addr), insn, x,
incr, addr);
else if (HAVE_POST_DECREMENT
&& (INTVAL (inc_val) == -size && offset == 0))
attempt_auto_inc (pbi, gen_rtx_POST_DEC (Pmode, addr), insn, x,
incr, addr);
else if (HAVE_PRE_INCREMENT
&& (INTVAL (inc_val) == size && offset == size))
attempt_auto_inc (pbi, gen_rtx_PRE_INC (Pmode, addr), insn, x,
incr, addr);
else if (HAVE_PRE_DECREMENT
&& (INTVAL (inc_val) == -size && offset == -size))
attempt_auto_inc (pbi, gen_rtx_PRE_DEC (Pmode, addr), insn, x,
incr, addr);
else if (HAVE_POST_MODIFY_DISP && offset == 0)
attempt_auto_inc (pbi, gen_rtx_POST_MODIFY (Pmode, addr,
gen_rtx_PLUS (Pmode,
addr,
inc_val)),
insn, x, incr, addr);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
else if (HAVE_PRE_MODIFY_DISP && offset == INTVAL (inc_val))
attempt_auto_inc (pbi, gen_rtx_PRE_MODIFY (Pmode, addr,
gen_rtx_PLUS (Pmode,
addr,
inc_val)),
insn, x, incr, addr);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else if (REG_P (inc_val)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& ! reg_set_between_p (inc_val, PREV_INSN (insn),
NEXT_INSN (incr)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
if (HAVE_POST_MODIFY_REG && offset == 0)
attempt_auto_inc (pbi, gen_rtx_POST_MODIFY (Pmode, addr,
gen_rtx_PLUS (Pmode,
addr,
inc_val)),
insn, x, incr, addr);
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif /* AUTO_INC_DEC */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_used_reg (struct propagate_block_info *pbi, rtx reg,
rtx cond ATTRIBUTE_UNUSED, rtx insn)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int regno_first, regno_last, i;
int some_was_live, some_was_dead, some_not_set;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
regno_last = regno_first = REGNO (reg);
if (regno_first < FIRST_PSEUDO_REGISTER)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regno_last += hard_regno_nregs[regno_first][GET_MODE (reg)] - 1;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Find out if any of this register is live after this instruction. */
some_was_live = some_was_dead = 0;
for (i = regno_first; i <= regno_last; ++i)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int needed_regno = REGNO_REG_SET_P (pbi->reg_live, i);
some_was_live |= needed_regno;
some_was_dead |= ! needed_regno;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Find out if any of the register was set this insn. */
some_not_set = 0;
for (i = regno_first; i <= regno_last; ++i)
some_not_set |= ! REGNO_REG_SET_P (pbi->new_set, i);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (pbi->flags & (PROP_LOG_LINKS | PROP_AUTOINC))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Record where each reg is used, so when the reg is set we know
the next insn that uses it. */
pbi->reg_next_use[regno_first] = insn;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (pbi->flags & PROP_REG_INFO)
{
if (regno_first < FIRST_PSEUDO_REGISTER)
{
/* If this is a register we are going to try to eliminate,
don't mark it live here. If we are successful in
eliminating it, it need not be live unless it is used for
pseudos, in which case it will have been set live when it
was allocated to the pseudos. If the register will not
be eliminated, reload will set it live at that point.
Otherwise, record that this function uses this register. */
/* ??? The PPC backend tries to "eliminate" on the pic
register to itself. This should be fixed. In the mean
time, hack around it. */
if (! (TEST_HARD_REG_BIT (elim_reg_set, regno_first)
&& (regno_first == FRAME_POINTER_REGNUM
|| regno_first == ARG_POINTER_REGNUM)))
for (i = regno_first; i <= regno_last; ++i)
regs_ever_live[i] = 1;
}
else
{
/* Keep track of which basic block each reg appears in. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int blocknum = pbi->bb->index;
if (REG_BASIC_BLOCK (regno_first) == REG_BLOCK_UNKNOWN)
REG_BASIC_BLOCK (regno_first) = blocknum;
else if (REG_BASIC_BLOCK (regno_first) != blocknum)
REG_BASIC_BLOCK (regno_first) = REG_BLOCK_GLOBAL;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Count (weighted) number of uses of each reg. */
REG_FREQ (regno_first) += REG_FREQ_FROM_BB (pbi->bb);
REG_N_REFS (regno_first)++;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
for (i = regno_first; i <= regno_last; ++i)
if (! REGNO_REG_SET_P (pbi->reg_live, i))
{
gcc_assert (!reg_deaths[i]);
reg_deaths[i] = pbi->insn_num;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Record and count the insns in which a reg dies. If it is used in
this insn and was dead below the insn then it dies in this insn.
If it was set in this insn, we do not make a REG_DEAD note;
likewise if we already made such a note. */
if ((pbi->flags & (PROP_DEATH_NOTES | PROP_REG_INFO))
&& some_was_dead
&& some_not_set)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Check for the case where the register dying partially
overlaps the register set by this insn. */
if (regno_first != regno_last)
for (i = regno_first; i <= regno_last; ++i)
some_was_live |= REGNO_REG_SET_P (pbi->new_set, i);
/* If none of the words in X is needed, make a REG_DEAD note.
Otherwise, we must make partial REG_DEAD notes. */
if (! some_was_live)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if ((pbi->flags & PROP_DEATH_NOTES)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#ifdef STACK_REGS
&& (!(pbi->flags & PROP_POST_REGSTACK)
|| !IN_RANGE (REGNO (reg), FIRST_STACK_REG, LAST_STACK_REG))
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& ! find_regno_note (insn, REG_DEAD, regno_first))
REG_NOTES (insn)
= alloc_EXPR_LIST (REG_DEAD, reg, REG_NOTES (insn));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (pbi->flags & PROP_REG_INFO)
REG_N_DEATHS (regno_first)++;
}
else
{
/* Don't make a REG_DEAD note for a part of a register
that is set in the insn. */
for (i = regno_first; i <= regno_last; ++i)
if (! REGNO_REG_SET_P (pbi->reg_live, i)
&& ! dead_or_set_regno_p (insn, i))
REG_NOTES (insn)
= alloc_EXPR_LIST (REG_DEAD,
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
regno_reg_rtx[i],
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
REG_NOTES (insn));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Mark the register as being live. */
for (i = regno_first; i <= regno_last; ++i)
{
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
#ifdef HAVE_conditional_execution
int this_was_live = REGNO_REG_SET_P (pbi->reg_live, i);
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_REGNO_REG_SET (pbi->reg_live, i);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef HAVE_conditional_execution
/* If this is a conditional use, record that fact. If it is later
conditionally set, we'll know to kill the register. */
if (cond != NULL_RTX)
{
splay_tree_node node;
struct reg_cond_life_info *rcli;
rtx ncond;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
if (this_was_live)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
node = splay_tree_lookup (pbi->reg_cond_dead, i);
if (node == NULL)
{
/* The register was unconditionally live previously.
No need to do anything. */
}
else
{
/* The register was conditionally live previously.
Subtract the new life cond from the old death cond. */
rcli = (struct reg_cond_life_info *) node->value;
ncond = rcli->condition;
ncond = and_reg_cond (ncond, not_reg_cond (cond), 1);
/* If the register is now unconditionally live,
remove the entry in the splay_tree. */
if (ncond == const0_rtx)
splay_tree_remove (pbi->reg_cond_dead, i);
else
{
rcli->condition = ncond;
SET_REGNO_REG_SET (pbi->reg_cond_reg,
REGNO (XEXP (cond, 0)));
}
}
}
else
{
/* The register was not previously live at all. Record
the condition under which it is still dead. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rcli = XNEW (struct reg_cond_life_info);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rcli->condition = not_reg_cond (cond);
rcli->stores = const0_rtx;
rcli->orig_condition = const0_rtx;
splay_tree_insert (pbi->reg_cond_dead, i,
(splay_tree_value) rcli);
SET_REGNO_REG_SET (pbi->reg_cond_reg, REGNO (XEXP (cond, 0)));
}
}
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
else if (this_was_live)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* The register may have been conditionally live previously, but
is now unconditionally live. Remove it from the conditionally
dead list, so that a conditional set won't cause us to think
it dead. */
splay_tree_remove (pbi->reg_cond_dead, i);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Scan expression X for registers which have to be marked used in PBI.
X is considered to be the SET_DEST rtx of SET. TRUE is returned if
X could be handled by this function. */
static bool
mark_used_dest_regs (struct propagate_block_info *pbi, rtx x, rtx cond, rtx insn)
{
int regno;
bool mark_dest = false;
rtx dest = x;
/* On some platforms calls return values spread over several
locations. These locations are wrapped in a EXPR_LIST rtx
together with a CONST_INT offset. */
if (GET_CODE (x) == EXPR_LIST
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
x = XEXP (x, 0);
if (x == NULL_RTX)
return false;
/* If storing into MEM, don't show it as being used. But do
show the address as being used. */
if (MEM_P (x))
{
#ifdef AUTO_INC_DEC
if (pbi->flags & PROP_AUTOINC)
find_auto_inc (pbi, x, insn);
#endif
mark_used_regs (pbi, XEXP (x, 0), cond, insn);
return true;
}
/* Storing in STRICT_LOW_PART is like storing in a reg
in that this SET might be dead, so ignore it in TESTREG.
but in some other ways it is like using the reg.
Storing in a SUBREG or a bit field is like storing the entire
register in that if the register's value is not used
then this SET is not needed. */
while (GET_CODE (x) == STRICT_LOW_PART
|| GET_CODE (x) == ZERO_EXTRACT
|| GET_CODE (x) == SUBREG)
{
#ifdef CANNOT_CHANGE_MODE_CLASS
if ((pbi->flags & PROP_REG_INFO) && GET_CODE (x) == SUBREG)
record_subregs_of_mode (x);
#endif
/* Modifying a single register in an alternate mode
does not use any of the old value. But these other
ways of storing in a register do use the old value. */
if (GET_CODE (x) == SUBREG
&& !((REG_BYTES (SUBREG_REG (x))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD
> (REG_BYTES (x)
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD))
;
else
mark_dest = true;
x = XEXP (x, 0);
}
/* If this is a store into a register or group of registers,
recursively scan the value being stored. */
if (REG_P (x)
&& (regno = REGNO (x),
!(regno == FRAME_POINTER_REGNUM
&& (!reload_completed || frame_pointer_needed)))
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
&& !(regno == HARD_FRAME_POINTER_REGNUM
&& (!reload_completed || frame_pointer_needed))
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& !(regno == ARG_POINTER_REGNUM && fixed_regs[regno])
#endif
)
{
if (mark_dest)
mark_used_regs (pbi, dest, cond, insn);
return true;
}
return false;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Scan expression X and store a 1-bit in NEW_LIVE for each reg it uses.
This is done assuming the registers needed from X are those that
have 1-bits in PBI->REG_LIVE.
INSN is the containing instruction. If INSN is dead, this function
is not called. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_used_regs (struct propagate_block_info *pbi, rtx x, rtx cond, rtx insn)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
RTX_CODE code;
int flags = pbi->flags;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
retry:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (!x)
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
code = GET_CODE (x);
switch (code)
{
case LABEL_REF:
case SYMBOL_REF:
case CONST_INT:
case CONST:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
case PC:
case ADDR_VEC:
case ADDR_DIFF_VEC:
return;
#ifdef HAVE_cc0
case CC0:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
pbi->cc0_live = 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return;
#endif
case CLOBBER:
/* If we are clobbering a MEM, mark any registers inside the address
as being used. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (XEXP (x, 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mark_used_regs (pbi, XEXP (XEXP (x, 0), 0), cond, insn);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case MEM:
/* Don't bother watching stores to mems if this is not the
final pass. We'll not be deleting dead stores this round. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (optimize && (flags & PROP_SCAN_DEAD_STORES))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* Invalidate the data for the last MEM stored, but only if MEM is
something that can be stored into. */
if (GET_CODE (XEXP (x, 0)) == SYMBOL_REF
&& CONSTANT_POOL_ADDRESS_P (XEXP (x, 0)))
/* Needn't clear the memory set list. */
;
else
{
rtx temp = pbi->mem_set_list;
rtx prev = NULL_RTX;
rtx next;
while (temp)
{
next = XEXP (temp, 1);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (anti_dependence (XEXP (temp, 0), x))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* Splice temp out of the list. */
if (prev)
XEXP (prev, 1) = next;
else
pbi->mem_set_list = next;
free_EXPR_LIST_node (temp);
pbi->mem_set_list_len--;
}
else
prev = temp;
temp = next;
}
}
/* If the memory reference had embedded side effects (autoincrement
address modes. Then we may need to kill some entries on the
memory set list. */
if (insn)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
for_each_rtx (&PATTERN (insn), invalidate_mems_from_autoinc, pbi);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
#ifdef AUTO_INC_DEC
if (flags & PROP_AUTOINC)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
find_auto_inc (pbi, x, insn);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
break;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
case SUBREG:
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#ifdef CANNOT_CHANGE_MODE_CLASS
Gcc 3.4.4 release.
2005-06-03 03:28:44 +00:00
if (flags & PROP_REG_INFO)
record_subregs_of_mode (x);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* While we're here, optimize this case. */
x = SUBREG_REG (x);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!REG_P (x))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
goto retry;
/* Fall through. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
case REG:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* See a register other than being set => mark it as needed. */
mark_used_reg (pbi, x, cond, insn);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return;
case SET:
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rtx dest = SET_DEST (x);
int i;
bool ret = false;
if (GET_CODE (dest) == PARALLEL)
for (i = 0; i < XVECLEN (dest, 0); i++)
ret |= mark_used_dest_regs (pbi, XVECEXP (dest, 0, i), cond, insn);
else
ret = mark_used_dest_regs (pbi, dest, cond, insn);
if (ret)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
mark_used_regs (pbi, SET_SRC (x), cond, insn);
return;
}
}
break;
case ASM_OPERANDS:
case UNSPEC_VOLATILE:
case TRAP_IF:
case ASM_INPUT:
{
/* Traditional and volatile asm instructions must be considered to use
and clobber all hard registers, all pseudo-registers and all of
memory. So must TRAP_IF and UNSPEC_VOLATILE operations.
Consider for instance a volatile asm that changes the fpu rounding
mode. An insn should not be moved across this even if it only uses
pseudo-regs because it might give an incorrectly rounded result.
?!? Unfortunately, marking all hard registers as live causes massive
problems for the register allocator and marking all pseudos as live
creates mountains of uninitialized variable warnings.
So for now, just clear the memory set list and mark any regs
we can find in ASM_OPERANDS as used. */
if (code != ASM_OPERANDS || MEM_VOLATILE_P (x))
{
free_EXPR_LIST_list (&pbi->mem_set_list);
pbi->mem_set_list_len = 0;
}
/* For all ASM_OPERANDS, we must traverse the vector of input operands.
We can not just fall through here since then we would be confused
by the ASM_INPUT rtx inside ASM_OPERANDS, which do not indicate
traditional asms unlike their normal usage. */
if (code == ASM_OPERANDS)
{
int j;
for (j = 0; j < ASM_OPERANDS_INPUT_LENGTH (x); j++)
mark_used_regs (pbi, ASM_OPERANDS_INPUT (x, j), cond, insn);
}
break;
}
case COND_EXEC:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (!cond);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mark_used_regs (pbi, COND_EXEC_TEST (x), NULL_RTX, insn);
cond = COND_EXEC_TEST (x);
x = COND_EXEC_CODE (x);
goto retry;
default:
break;
}
/* Recursively scan the operands of this expression. */
{
const char * const fmt = GET_RTX_FORMAT (code);
int i;
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
{
/* Tail recursive case: save a function call level. */
if (i == 0)
{
x = XEXP (x, 0);
goto retry;
}
mark_used_regs (pbi, XEXP (x, i), cond, insn);
}
else if (fmt[i] == 'E')
{
int j;
for (j = 0; j < XVECLEN (x, i); j++)
mark_used_regs (pbi, XVECEXP (x, i, j), cond, insn);
}
}
}
}
#ifdef AUTO_INC_DEC
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
try_pre_increment_1 (struct propagate_block_info *pbi, rtx insn)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* Find the next use of this reg. If in same basic block,
make it do pre-increment or pre-decrement if appropriate. */
rtx x = single_set (insn);
HOST_WIDE_INT amount = ((GET_CODE (SET_SRC (x)) == PLUS ? 1 : -1)
* INTVAL (XEXP (SET_SRC (x), 1)));
int regno = REGNO (SET_DEST (x));
rtx y = pbi->reg_next_use[regno];
if (y != 0
&& SET_DEST (x) != stack_pointer_rtx
&& BLOCK_NUM (y) == BLOCK_NUM (insn)
/* Don't do this if the reg dies, or gets set in y; a standard addressing
mode would be better. */
&& ! dead_or_set_p (y, SET_DEST (x))
&& try_pre_increment (y, SET_DEST (x), amount))
{
/* We have found a suitable auto-increment and already changed
insn Y to do it. So flush this increment instruction. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
propagate_block_delete_insn (insn);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Count a reference to this reg for the increment insn we are
deleting. When a reg is incremented, spilling it is worse,
so we want to make that less likely. */
if (regno >= FIRST_PSEUDO_REGISTER)
{
REG_FREQ (regno) += REG_FREQ_FROM_BB (pbi->bb);
REG_N_SETS (regno)++;
}
/* Flush any remembered memories depending on the value of
the incremented register. */
invalidate_mems_from_set (pbi, SET_DEST (x));
return 1;
}
return 0;
}
/* Try to change INSN so that it does pre-increment or pre-decrement
addressing on register REG in order to add AMOUNT to REG.
AMOUNT is negative for pre-decrement.
Returns 1 if the change could be made.
This checks all about the validity of the result of modifying INSN. */
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
try_pre_increment (rtx insn, rtx reg, HOST_WIDE_INT amount)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx use;
/* Nonzero if we can try to make a pre-increment or pre-decrement.
For example, addl $4,r1; movl (r1),... can become movl +(r1),... */
int pre_ok = 0;
/* Nonzero if we can try to make a post-increment or post-decrement.
For example, addl $4,r1; movl -4(r1),... can become movl (r1)+,...
It is possible for both PRE_OK and POST_OK to be nonzero if the machine
supports both pre-inc and post-inc, or both pre-dec and post-dec. */
int post_ok = 0;
/* Nonzero if the opportunity actually requires post-inc or post-dec. */
int do_post = 0;
/* From the sign of increment, see which possibilities are conceivable
on this target machine. */
if (HAVE_PRE_INCREMENT && amount > 0)
pre_ok = 1;
if (HAVE_POST_INCREMENT && amount > 0)
post_ok = 1;
if (HAVE_PRE_DECREMENT && amount < 0)
pre_ok = 1;
if (HAVE_POST_DECREMENT && amount < 0)
post_ok = 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! (pre_ok || post_ok))
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* It is not safe to add a side effect to a jump insn
because if the incremented register is spilled and must be reloaded
there would be no way to store the incremented value back in memory. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (JUMP_P (insn))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
use = 0;
if (pre_ok)
use = find_use_as_address (PATTERN (insn), reg, 0);
if (post_ok && (use == 0 || use == (rtx) (size_t) 1))
{
use = find_use_as_address (PATTERN (insn), reg, -amount);
do_post = 1;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (use == 0 || use == (rtx) (size_t) 1)
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_MODE_SIZE (GET_MODE (use)) != (amount > 0 ? amount : - amount))
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* See if this combination of instruction and addressing mode exists. */
if (! validate_change (insn, &XEXP (use, 0),
gen_rtx_fmt_e (amount > 0
? (do_post ? POST_INC : PRE_INC)
: (do_post ? POST_DEC : PRE_DEC),
Pmode, reg), 0))
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Record that this insn now has an implicit side effect on X. */
REG_NOTES (insn) = alloc_EXPR_LIST (REG_INC, reg, REG_NOTES (insn));
return 1;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#endif /* AUTO_INC_DEC */
/* Find the place in the rtx X where REG is used as a memory address.
Return the MEM rtx that so uses it.
If PLUSCONST is nonzero, search instead for a memory address equivalent to
(plus REG (const_int PLUSCONST)).
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
If such an address does not appear, return 0.
If REG appears more than once, or is used other than in such an address,
return (rtx) 1. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_use_as_address (rtx x, rtx reg, HOST_WIDE_INT plusconst)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
enum rtx_code code = GET_CODE (x);
const char * const fmt = GET_RTX_FORMAT (code);
int i;
rtx value = 0;
rtx tem;
if (code == MEM && XEXP (x, 0) == reg && plusconst == 0)
return x;
if (code == MEM && GET_CODE (XEXP (x, 0)) == PLUS
&& XEXP (XEXP (x, 0), 0) == reg
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& INTVAL (XEXP (XEXP (x, 0), 1)) == plusconst)
return x;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (code == SIGN_EXTRACT || code == ZERO_EXTRACT)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If REG occurs inside a MEM used in a bit-field reference,
that is unacceptable. */
if (find_use_as_address (XEXP (x, 0), reg, 0) != 0)
return (rtx) (size_t) 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (x == reg)
return (rtx) (size_t) 1;
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (fmt[i] == 'e')
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tem = find_use_as_address (XEXP (x, i), reg, plusconst);
if (value == 0)
value = tem;
else if (tem != 0)
return (rtx) (size_t) 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int j;
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tem = find_use_as_address (XVECEXP (x, i, j), reg, plusconst);
if (value == 0)
value = tem;
else if (tem != 0)
return (rtx) (size_t) 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return value;
}
/* Write information about registers and basic blocks into FILE.
This is part of making a debugging dump. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
dump_regset (regset r, FILE *outf)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
reg_set_iterator rsi;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (r == NULL)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
fputs (" (nil)", outf);
return;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_REG_SET (r, 0, i, rsi)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
fprintf (outf, " %d", i);
if (i < FIRST_PSEUDO_REGISTER)
fprintf (outf, " [%s]",
reg_names[i]);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Print a human-readable representation of R on the standard error
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
stream. This function is designed to be used from within the
debugger. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
debug_regset (regset r)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
dump_regset (r, stderr);
putc ('\n', stderr);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Recompute register set/reference counts immediately prior to register
allocation.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
This avoids problems with set/reference counts changing to/from values
which have special meanings to the register allocators.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Additionally, the reference counts are the primary component used by the
register allocators to prioritize pseudos for allocation to hard regs.
More accurate reference counts generally lead to better register allocation.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
It might be worthwhile to update REG_LIVE_LENGTH, REG_BASIC_BLOCK and
possibly other information which is used by the register allocators. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static unsigned int
recompute_reg_usage (void)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
allocate_reg_life_data ();
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* distribute_notes in combiner fails to convert some of the
REG_UNUSED notes to REG_DEAD notes. This causes CHECK_DEAD_NOTES
in sched1 to die. To solve this update the DEATH_NOTES
here. */
update_life_info (NULL, UPDATE_LIFE_LOCAL, PROP_REG_INFO | PROP_DEATH_NOTES);
if (dump_file)
dump_flow_info (dump_file, dump_flags);
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
struct tree_opt_pass pass_recompute_reg_usage =
{
"life2", /* name */
NULL, /* gate */
recompute_reg_usage, /* execute */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
0, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_dump_func, /* todo_flags_finish */
'f' /* letter */
};
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Optionally removes all the REG_DEAD and REG_UNUSED notes from a set of
blocks. If BLOCKS is NULL, assume the universal set. Returns a count
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
of the number of registers that died.
If KILL is 1, remove old REG_DEAD / REG_UNUSED notes. If it is 0, don't.
if it is -1, remove them unless they pertain to a stack reg. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
count_or_remove_death_notes (sbitmap blocks, int kill)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
int count = 0;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned int i = 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block bb;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* This used to be a loop over all the blocks with a membership test
inside the loop. That can be amazingly expensive on a large CFG
when only a small number of bits are set in BLOCKs (for example,
the calls from the scheduler typically have very few bits set).
For extra credit, someone should convert BLOCKS to a bitmap rather
than an sbitmap. */
if (blocks)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
sbitmap_iterator sbi;
EXECUTE_IF_SET_IN_SBITMAP (blocks, 0, i, sbi)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
basic_block bb = BASIC_BLOCK (i);
/* The bitmap may be flawed in that one of the basic blocks
may have been deleted before you get here. */
if (bb)
count += count_or_remove_death_notes_bb (bb, kill);
};
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
}
else
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
FOR_EACH_BB (bb)
{
count += count_or_remove_death_notes_bb (bb, kill);
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
return count;
}
/* Optionally removes all the REG_DEAD and REG_UNUSED notes from basic
block BB. Returns a count of the number of registers that died. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static int
count_or_remove_death_notes_bb (basic_block bb, int kill)
{
int count = 0;
rtx insn;
for (insn = BB_HEAD (bb); ; insn = NEXT_INSN (insn))
{
if (INSN_P (insn))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx *pprev = &REG_NOTES (insn);
rtx link = *pprev;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
while (link)
{
switch (REG_NOTE_KIND (link))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
case REG_DEAD:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (XEXP (link, 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx reg = XEXP (link, 0);
int n;
if (REGNO (reg) >= FIRST_PSEUDO_REGISTER)
n = 1;
else
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
n = hard_regno_nregs[REGNO (reg)][GET_MODE (reg)];
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
count += n;
}
/* Fall through. */
case REG_UNUSED:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (kill > 0
|| (kill
#ifdef STACK_REGS
&& (!REG_P (XEXP (link, 0))
|| !IN_RANGE (REGNO (XEXP (link, 0)),
FIRST_STACK_REG, LAST_STACK_REG))
#endif
))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
{
rtx next = XEXP (link, 1);
free_EXPR_LIST_node (link);
*pprev = link = next;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Fall through. */
default:
pprev = &XEXP (link, 1);
link = *pprev;
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (insn == BB_END (bb))
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return count;
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Clear LOG_LINKS fields of insns in a selected blocks or whole chain
if blocks is NULL. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
clear_log_links (sbitmap blocks)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx insn;
if (!blocks)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
if (INSN_P (insn))
free_INSN_LIST_list (&LOG_LINKS (insn));
}
else
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
unsigned int i = 0;
sbitmap_iterator sbi;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_SBITMAP (blocks, 0, i, sbi)
{
basic_block bb = BASIC_BLOCK (i);
for (insn = BB_HEAD (bb); insn != NEXT_INSN (BB_END (bb));
insn = NEXT_INSN (insn))
if (INSN_P (insn))
free_INSN_LIST_list (&LOG_LINKS (insn));
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Given a register bitmap, turn on the bits in a HARD_REG_SET that
correspond to the hard registers, if any, set in that map. This
could be done far more efficiently by having all sorts of special-cases
with moving single words, but probably isn't worth the trouble. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_set_to_hard_reg_set (HARD_REG_SET *to, bitmap from)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
bitmap_iterator bi;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_BITMAP (from, 0, i, bi)
{
if (i >= FIRST_PSEUDO_REGISTER)
return;
SET_HARD_REG_BIT (*to, i);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static bool
gate_remove_death_notes (void)
{
return flag_profile_values;
}
static unsigned int
rest_of_handle_remove_death_notes (void)
{
count_or_remove_death_notes (NULL, 1);
return 0;
}
struct tree_opt_pass pass_remove_death_notes =
{
"ednotes", /* name */
gate_remove_death_notes, /* gate */
rest_of_handle_remove_death_notes, /* execute */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
0, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
0, /* todo_flags_finish */
0 /* letter */
};
/* Perform life analysis. */
static unsigned int
rest_of_handle_life (void)
{
regclass_init ();
life_analysis (PROP_FINAL);
if (optimize)
cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE | CLEANUP_LOG_LINKS
| (flag_thread_jumps ? CLEANUP_THREADING : 0));
if (extra_warnings)
{
setjmp_vars_warning (DECL_INITIAL (current_function_decl));
setjmp_args_warning ();
}
if (optimize)
{
if (initialize_uninitialized_subregs ())
{
/* Insns were inserted, and possibly pseudos created, so
things might look a bit different. */
allocate_reg_life_data ();
update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
PROP_LOG_LINKS | PROP_REG_INFO | PROP_DEATH_NOTES);
}
}
no_new_pseudos = 1;
return 0;
}
struct tree_opt_pass pass_life =
{
"life1", /* name */
NULL, /* gate */
rest_of_handle_life, /* execute */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
TV_FLOW, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
TODO_verify_flow, /* todo_flags_start */
TODO_dump_func |
TODO_ggc_collect, /* todo_flags_finish */
'f' /* letter */
};
static unsigned int
rest_of_handle_flow2 (void)
{
/* If optimizing, then go ahead and split insns now. */
#ifndef STACK_REGS
if (optimize > 0)
#endif
split_all_insns (0);
if (flag_branch_target_load_optimize)
branch_target_load_optimize (epilogue_completed);
if (optimize)
cleanup_cfg (CLEANUP_EXPENSIVE);
/* On some machines, the prologue and epilogue code, or parts thereof,
can be represented as RTL. Doing so lets us schedule insns between
it and the rest of the code and also allows delayed branch
scheduling to operate in the epilogue. */
thread_prologue_and_epilogue_insns (get_insns ());
epilogue_completed = 1;
flow2_completed = 1;
return 0;
}
struct tree_opt_pass pass_flow2 =
{
"flow2", /* name */
NULL, /* gate */
rest_of_handle_flow2, /* execute */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
TV_FLOW2, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
TODO_verify_flow, /* todo_flags_start */
TODO_dump_func |
TODO_ggc_collect, /* todo_flags_finish */
'w' /* letter */
};
Reference in New Issue Copy Permalink