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freebsd/contrib/gcc/rtl.h
David E. O'Brien 1952e2e1c1 Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 
These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00

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/* Register Transfer Language (RTL) definitions for GNU C-Compiler
Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GCC.
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.
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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef GCC_RTL_H
#define GCC_RTL_H
struct function;
#include "machmode.h"
#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
#undef FLOAT /* Likewise. */
#undef ABS /* Likewise. */
#undef PC /* Likewise. */
/* Value used by some passes to "recognize" noop moves as valid
instructions. */
#define NOOP_MOVE_INSN_CODE INT_MAX
/* Register Transfer Language EXPRESSIONS CODES */
#define RTX_CODE enum rtx_code
enum rtx_code {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
#include "rtl.def" /* rtl expressions are documented here */
#undef DEF_RTL_EXPR
LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
NUM_RTX_CODE.
Assumes default enum value assignment. */
#define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
/* The cast here, saves many elsewhere. */
extern const unsigned char rtx_length[NUM_RTX_CODE];
#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
extern const char * const rtx_name[NUM_RTX_CODE];
#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
extern const char * const rtx_format[NUM_RTX_CODE];
#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
extern const char rtx_class[NUM_RTX_CODE];
#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
relative to which the offsets are calculated, as explained in rtl.def. */
typedef struct
{
/* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
unsigned min_align: 8;
/* Flags: */
unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
unsigned min_after_vec: 1; /* minimum address target label is
after the ADDR_DIFF_VEC. */
unsigned max_after_vec: 1; /* maximum address target label is
after the ADDR_DIFF_VEC. */
unsigned min_after_base: 1; /* minimum address target label is
after BASE. */
unsigned max_after_base: 1; /* maximum address target label is
after BASE. */
/* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
unsigned : 2;
unsigned scale : 8;
} addr_diff_vec_flags;
/* Structure used to describe the attributes of a MEM. These are hashed
so MEMs that the same attributes share a data structure. This means
they cannot be modified in place. If any element is nonzero, it means
the value of the corresponding attribute is unknown. */
typedef struct
{
HOST_WIDE_INT alias; /* Memory alias set. */
tree expr; /* expr corresponding to MEM. */
rtx offset; /* Offset from start of DECL, as CONST_INT. */
rtx size; /* Size in bytes, as a CONST_INT. */
unsigned int align; /* Alignment of MEM in bits. */
} mem_attrs;
/* Common union for an element of an rtx. */
typedef union rtunion_def
{
HOST_WIDE_INT rtwint;
int rtint;
unsigned int rtuint;
const char *rtstr;
rtx rtx;
rtvec rtvec;
enum machine_mode rttype;
addr_diff_vec_flags rt_addr_diff_vec_flags;
struct cselib_val_struct *rt_cselib;
struct bitmap_head_def *rtbit;
tree rttree;
struct basic_block_def *bb;
mem_attrs *rtmem;
} rtunion;
/* RTL expression ("rtx"). */
struct rtx_def
{
/* The kind of expression this is. */
ENUM_BITFIELD(rtx_code) code: 16;
/* The kind of value the expression has. */
ENUM_BITFIELD(machine_mode) mode : 8;
/* 1 in an INSN if it can alter flow of control
within this function.
MEM_KEEP_ALIAS_SET_P in a MEM.
LINK_COST_ZERO in an INSN_LIST.
SET_IS_RETURN_P in a SET. */
unsigned int jump : 1;
/* 1 in an INSN if it can call another function.
LINK_COST_FREE in an INSN_LIST. */
unsigned int call : 1;
/* 1 in a REG if value of this expression will never change during
the current function, even though it is not manifestly constant.
1 in a MEM if contents of memory are constant. This does not
necessarily mean that the value of this expression is constant.
1 in a SUBREG if it is from a promoted variable that is unsigned.
1 in a SYMBOL_REF if it addresses something in the per-function
constants pool.
1 in a CALL_INSN if it is a const call.
1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
reorg until end of compilation; cleared before used. */
unsigned int unchanging : 1;
/* 1 in a MEM expression if contents of memory are volatile.
1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
if it is deleted.
1 in a REG expression if corresponds to a variable declared by the user.
0 for an internally generated temporary.
In a SYMBOL_REF, this flag is used for machine-specific purposes.
In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
unsigned int volatil : 1;
/* 1 in a MEM referring to a field of an aggregate.
0 if the MEM was a variable or the result of a * operator in C;
1 if it was the result of a . or -> operator (on a struct) in C.
1 in a REG if the register is used only in exit code a loop.
1 in a SUBREG expression if was generated from a variable with a
promoted mode.
1 in a CODE_LABEL if the label is used for nonlocal gotos
and must not be deleted even if its count is zero.
1 in a LABEL_REF if this is a reference to a label outside the
current loop.
1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
together with the preceding insn. Valid only within sched.
1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
from the target of a branch. Valid from reorg until end of compilation;
cleared before used.
1 in an INSN if this insn is dead code. Valid only during
dead-code elimination phase; cleared before use. */
unsigned int in_struct : 1;
/* 1 if this rtx is used. This is used for copying shared structure.
See `unshare_all_rtl'.
In a REG, this is not needed for that purpose, and used instead
in `leaf_renumber_regs_insn'.
In a SYMBOL_REF, means that emit_library_call
has used it as the function. */
unsigned int used : 1;
/* Nonzero if this rtx came from procedure integration.
In a REG, nonzero means this reg refers to the return value
of the current function.
1 in a SYMBOL_REF if the symbol is weak. */
unsigned integrated : 1;
/* 1 in an INSN or a SET if this rtx is related to the call frame,
either changing how we compute the frame address or saving and
restoring registers in the prologue and epilogue.
1 in a MEM if the MEM refers to a scalar, rather than a member of
an aggregate.
1 in a REG if the register is a pointer.
1 in a SYMBOL_REF if it addresses something in the per-function
constant string pool. */
unsigned frame_related : 1;
/* The first element of the operands of this rtx.
The number of operands and their types are controlled
by the `code' field, according to rtl.def. */
rtunion fld[1];
};
#define NULL_RTX (rtx) 0
/* Define macros to access the `code' field of the rtx. */
#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
#define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
#define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
/* RTL vector. These appear inside RTX's when there is a need
for a variable number of things. The principle use is inside
PARALLEL expressions. */
struct rtvec_def {
int num_elem; /* number of elements */
rtx elem[1];
};
#define NULL_RTVEC (rtvec) 0
#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
/* Predicate yielding nonzero iff X is an rtl for a register. */
#define REG_P(X) (GET_CODE (X) == REG)
/* Predicate yielding nonzero iff X is a label insn. */
#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
/* Predicate yielding nonzero iff X is a jump insn. */
#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
/* Predicate yielding nonzero iff X is a note insn. */
#define NOTE_P(X) (GET_CODE (X) == NOTE)
/* Predicate yielding nonzero iff X is a barrier insn. */
#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
/* Predicate yielding nonzero iff X is a data for a jump table. */
#define JUMP_TABLE_DATA_P(INSN) \
(JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
/* 1 if X is a constant value that is an integer. */
#define CONSTANT_P(X) \
(GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
|| GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
|| GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
|| GET_CODE (X) == CONSTANT_P_RTX)
/* General accessor macros for accessing the fields of an rtx. */
#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
/* The bit with a star outside the statement expr and an & inside is
so that N can be evaluated only once. */
#define RTL_CHECK1(RTX, N, C1) __extension__ \
(*({ rtx _rtx = (RTX); int _n = (N); \
enum rtx_code _code = GET_CODE (_rtx); \
if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
__FUNCTION__); \
if (GET_RTX_FORMAT(_code)[_n] != C1) \
rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
__FUNCTION__); \
&_rtx->fld[_n]; }))
#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
(*({ rtx _rtx = (RTX); int _n = (N); \
enum rtx_code _code = GET_CODE (_rtx); \
if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
__FUNCTION__); \
if (GET_RTX_FORMAT(_code)[_n] != C1 \
&& GET_RTX_FORMAT(_code)[_n] != C2) \
rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
__FUNCTION__); \
&_rtx->fld[_n]; }))
#define RTL_CHECKC1(RTX, N, C) __extension__ \
(*({ rtx _rtx = (RTX); int _n = (N); \
if (GET_CODE (_rtx) != (C)) \
rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
__FUNCTION__); \
&_rtx->fld[_n]; }))
#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
(*({ rtx _rtx = (RTX); int _n = (N); \
enum rtx_code _code = GET_CODE (_rtx); \
if (_code != (C1) && _code != (C2)) \
rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
__FUNCTION__); \
&_rtx->fld[_n]; }))
#define RTVEC_ELT(RTVEC, I) __extension__ \
(*({ rtvec _rtvec = (RTVEC); int _i = (I); \
if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
__FUNCTION__); \
&_rtvec->elem[_i]; }))
extern void rtl_check_failed_bounds PARAMS ((rtx, int,
const char *, int, const char *))
ATTRIBUTE_NORETURN;
extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
const char *, int, const char *))
ATTRIBUTE_NORETURN;
extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
const char *, int, const char *))
ATTRIBUTE_NORETURN;
extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
const char *, int, const char *))
ATTRIBUTE_NORETURN;
extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
const char *, int, const char *))
ATTRIBUTE_NORETURN;
extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
const char *, int, const char *))
ATTRIBUTE_NORETURN;
#else /* not ENABLE_RTL_CHECKING */
#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
#endif
#define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
#define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
#define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
#define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
#define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
#define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
#define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
#define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
#define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
#define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
/* These are like XWINT, etc. except that they expect a '0' field instead
of the normal type code. */
#define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
#define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
#define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
#define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
#define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
#define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
#define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
#define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
#define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
#define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
#define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
#define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem)
#define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
#define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
#define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
#define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
#define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
#define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
#define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
#define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
#define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
#define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
#define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
/* ACCESS MACROS for particular fields of insns. */
/* Determines whether X is an insn. */
#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
/* Holds a unique number for each insn.
These are not necessarily sequentially increasing. */
#define INSN_UID(INSN) XINT (INSN, 0)
/* Chain insns together in sequence. */
#define PREV_INSN(INSN) XEXP (INSN, 1)
#define NEXT_INSN(INSN) XEXP (INSN, 2)
/* The body of an insn. */
#define PATTERN(INSN) XEXP (INSN, 3)
/* Code number of instruction, from when it was recognized.
-1 means this instruction has not been recognized yet. */
#define INSN_CODE(INSN) XINT (INSN, 4)
/* Set up in flow.c; empty before then.
Holds a chain of INSN_LIST rtx's whose first operands point at
previous insns with direct data-flow connections to this one.
That means that those insns set variables whose next use is in this insn.
They are always in the same basic block as this insn. */
#define LOG_LINKS(INSN) XEXP(INSN, 5)
/* 1 if insn has been deleted. */
#define INSN_DELETED_P(INSN) ((INSN)->volatil)
/* 1 if insn is a call to a const or pure function. */
#define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging)
/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
#define SIBLING_CALL_P(INSN) ((INSN)->jump)
/* 1 if insn is a branch that should not unconditionally execute its
delay slots, i.e., it is an annulled branch. */
#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
/* 1 if insn is in a delay slot and is from the target of the branch. If
the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
executed if the branch is taken. For annulled branches with this bit
clear, the insn should be executed only if the branch is not taken. */
#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
/* Holds a list of notes on what this insn does to various REGs.
It is a chain of EXPR_LIST rtx's, where the second operand is the
chain pointer and the first operand is the REG being described.
The mode field of the EXPR_LIST contains not a real machine mode
but a value from enum reg_note. */
#define REG_NOTES(INSN) XEXP(INSN, 6)
/* Don't forget to change reg_note_name in rtl.c. */
enum reg_note
{
/* The value in REG dies in this insn (i.e., it is not needed past
this insn). If REG is set in this insn, the REG_DEAD note may,
but need not, be omitted. */
REG_DEAD = 1,
/* The REG is autoincremented or autodecremented. */
REG_INC,
/* Describes the insn as a whole; it says that the insn sets a register
to a constant value or to be equivalent to a memory address. If the
register is spilled to the stack then the constant value should be
substituted for it. The contents of the REG_EQUIV is the constant
value or memory address, which may be different from the source of
the SET although it has the same value. A REG_EQUIV note may also
appear on an insn which copies a register parameter to a pseudo-register,
if there is a memory address which could be used to hold that
pseudo-register throughout the function. */
REG_EQUIV,
/* Like REG_EQUIV except that the destination is only momentarily equal
to the specified rtx. Therefore, it cannot be used for substitution;
but it can be used for cse. */
REG_EQUAL,
/* The register set in this insn held 0 before the insn. The contents of
the note is the insn that stored the 0. If that insn is deleted or
patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
is actually an INSN_LIST, not an EXPR_LIST. */
REG_WAS_0,
/* This insn copies the return-value of a library call out of the hard reg
for return values. This note is actually an INSN_LIST and it points to
the first insn involved in setting up arguments for the call. flow.c
uses this to delete the entire library call when its result is dead. */
REG_RETVAL,
/* The inverse of REG_RETVAL: it goes on the first insn of the library call
and points at the one that has the REG_RETVAL. This note is also an
INSN_LIST. */
REG_LIBCALL,
/* The register is always nonnegative during the containing loop. This is
used in branches so that decrement and branch instructions terminating
on zero can be matched. There must be an insn pattern in the md file
named `decrement_and_branch_until_zero' or else this will never be added
to any instructions. */
REG_NONNEG,
/* There is no conflict *after this insn* between the register in the note
and the destination of this insn. */
REG_NO_CONFLICT,
/* Identifies a register set in this insn and never used. */
REG_UNUSED,
/* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
respectively. Normally, these are required to be consecutive insns, but
we permit putting a cc0-setting insn in the delay slot of a branch as
long as only one copy of the insn exists. In that case, these notes
point from one to the other to allow code generation to determine what
any require information and to properly update CC_STATUS. These notes
are INSN_LISTs. */
REG_CC_SETTER, REG_CC_USER,
/* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
CODE_LABEL contained in the REG_LABEL note is used by the insn.
This note is an INSN_LIST. */
REG_LABEL,
/* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
write-after-read and write-after-write dependencies respectively.
Data dependencies, which are the only type of LOG_LINK created by
flow, are represented by a 0 reg note kind. */
REG_DEP_ANTI, REG_DEP_OUTPUT,
/* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
It has an integer value. For jumps, it is the probability that this is a
taken branch. For calls, it is the probability that this call won't
return. */
REG_BR_PROB,
/* REG_EXEC_COUNT is attached to the first insn of each basic block, and
the first insn after each CALL_INSN. It indicates how many times this
block was executed. */
REG_EXEC_COUNT,
/* Attached to a call insn; indicates that the call is malloc-like and
that the pointer returned cannot alias anything else. */
REG_NOALIAS,
/* Used to optimize rtl generated by dynamic stack allocations for targets
where SETJMP_VIA_SAVE_AREA is true. */
REG_SAVE_AREA,
/* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
CONCAT of two integer value. First specifies the branch predictor
that added the note, second specifies the predicted hitrate of branch
in the same format as REG_BR_PROB note uses. */
REG_BR_PRED,
/* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
for DWARF to interpret what they imply. The attached rtx is used
instead of intuition. */
REG_FRAME_RELATED_EXPR,
/* Indicates that REG holds the exception context for the function.
This context is shared by inline functions, so the code to acquire
the real exception context is delayed until after inlining. */
REG_EH_CONTEXT,
/* Indicates what exception region an INSN belongs in. This is used to
indicate what region to which a call may throw. REGION 0 indicates
that a call cannot throw at all. REGION -1 indicates that it cannot
throw, nor will it execute a non-local goto. */
REG_EH_REGION,
/* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
REG_SAVE_NOTE,
/* Indicates that this insn (which is part of the prologue) computes
a value which might not be used later, and if so it's OK to delete
the insn. Normally, deleting any insn in the prologue is an error.
At present the parameter is unused and set to (const_int 0). */
REG_MAYBE_DEAD,
/* Indicates that a call does not return. */
REG_NORETURN,
/* Indicates that an indirect jump is a non-local goto instead of a
computed goto. */
REG_NON_LOCAL_GOTO,
/* This kind of note is generated at each to `setjmp',
and similar functions that can return twice. */
REG_SETJMP,
/* Indicate calls that always returns. */
REG_ALWAYS_RETURN,
/* Indicate that the memory load references a vtable. The expression
is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
REG_VTABLE_REF
};
/* The base value for branch probability notes. */
#define REG_BR_PROB_BASE 10000
/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
#define PUT_REG_NOTE_KIND(LINK, KIND) \
PUT_MODE (LINK, (enum machine_mode) (KIND))
/* Names for REG_NOTE's in EXPR_LIST insn's. */
extern const char * const reg_note_name[];
#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
USE and CLOBBER expressions.
USE expressions list the registers filled with arguments that
are passed to the function.
CLOBBER expressions document the registers explicitly clobbered
by this CALL_INSN.
Pseudo registers can not be mentioned in this list. */
#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
/* The label-number of a code-label. The assembler label
is made from `L' and the label-number printed in decimal.
Label numbers are unique in a compilation. */
#define CODE_LABEL_NUMBER(INSN) XINT (INSN, 5)
#define LINE_NUMBER NOTE
/* In a NOTE that is a line number, this is a string for the file name that the
line is in. We use the same field to record block numbers temporarily in
NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
between ints and pointers if we use a different macro for the block number.)
The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
information as an rtx in the field. */
#define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 3, NOTE)
#define NOTE_BLOCK(INSN) XCTREE (INSN, 3, NOTE)
#define NOTE_EH_HANDLER(INSN) XCINT (INSN, 3, NOTE)
#define NOTE_RANGE_INFO(INSN) XCEXP (INSN, 3, NOTE)
#define NOTE_LIVE_INFO(INSN) XCEXP (INSN, 3, NOTE)
#define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 3, NOTE)
#define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 3, NOTE)
/* In a NOTE that is a line number, this is the line number.
Other kinds of NOTEs are identified by negative numbers here. */
#define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 4, NOTE)
/* Nonzero if INSN is a note marking the beginning of a basic block. */
#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
(GET_CODE (INSN) == NOTE \
&& NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
/* Codes that appear in the NOTE_LINE_NUMBER field
for kinds of notes that are not line numbers.
Notice that we do not try to use zero here for any of
the special note codes because sometimes the source line
actually can be zero! This happens (for example) when we
are generating code for the per-translation-unit constructor
and destructor routines for some C++ translation unit.
If you should change any of the following values, or if you
should add a new value here, don't forget to change the
note_insn_name array in rtl.c. */
enum insn_note
{
/* Keep all of these numbers negative. Adjust as needed. */
NOTE_INSN_BIAS = -100,
/* This note is used to get rid of an insn
when it isn't safe to patch the insn out of the chain. */
NOTE_INSN_DELETED,
/* These are used to mark the beginning and end of a lexical block.
See NOTE_BLOCK, identify_blocks and reorder_blocks. */
NOTE_INSN_BLOCK_BEG,
NOTE_INSN_BLOCK_END,
/* These mark the extremes of a loop. */
NOTE_INSN_LOOP_BEG,
NOTE_INSN_LOOP_END,
/* Generated at the place in a loop that `continue' jumps to. */
NOTE_INSN_LOOP_CONT,
/* Generated at the start of a duplicated exit test. */
NOTE_INSN_LOOP_VTOP,
/* Generated at the end of a conditional at the top of the loop.
This is used to perform a lame form of loop rotation in lieu
of actually understanding the loop structure. The note is
discarded after rotation is complete. */
NOTE_INSN_LOOP_END_TOP_COND,
/* This kind of note is generated at the end of the function body,
just before the return insn or return label. In an optimizing
compilation it is deleted by the first jump optimization, after
enabling that optimizer to determine whether control can fall
off the end of the function body without a return statement. */
NOTE_INSN_FUNCTION_END,
/* This marks the point immediately after the last prologue insn. */
NOTE_INSN_PROLOGUE_END,
/* This marks the point immediately prior to the first epilogue insn. */
NOTE_INSN_EPILOGUE_BEG,
/* Generated in place of user-declared labels when they are deleted. */
NOTE_INSN_DELETED_LABEL,
/* This note indicates the start of the real body of the function,
i.e. the point just after all of the parms have been moved into
their homes, etc. */
NOTE_INSN_FUNCTION_BEG,
/* These note where exception handling regions begin and end.
Uses NOTE_EH_HANDLER to identify the region in question. */
NOTE_INSN_EH_REGION_BEG,
NOTE_INSN_EH_REGION_END,
/* Generated whenever a duplicate line number note is output. For example,
one is output after the end of an inline function, in order to prevent
the line containing the inline call from being counted twice in gcov. */
NOTE_INSN_REPEATED_LINE_NUMBER,
/* Start/end of a live range region, where pseudos allocated on the stack
can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
NOTE_INSN_RANGE_BEG,
NOTE_INSN_RANGE_END,
/* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
NOTE_INSN_LIVE,
/* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
NOTE_INSN_BASIC_BLOCK,
/* Record the expected value of a register at a location. Uses
NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
NOTE_INSN_EXPECTED_VALUE,
NOTE_INSN_MAX
};
/* Names for NOTE insn's other than line numbers. */
extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
#define GET_NOTE_INSN_NAME(NOTE_CODE) \
(note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
/* The name of a label, in case it corresponds to an explicit label
in the input source code. */
#define LABEL_NAME(RTX) XCSTR (RTX, 6, CODE_LABEL)
/* In jump.c, each label contains a count of the number
of LABEL_REFs that point at it, so unused labels can be deleted. */
#define LABEL_NUSES(RTX) XCINT (RTX, 3, CODE_LABEL)
/* Associate a name with a CODE_LABEL. */
#define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
/* The original regno this ADDRESSOF was built for. */
#define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
/* The variable in the register we took the address of. */
#define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
be decremented and possibly the label can be deleted. */
#define JUMP_LABEL(INSN) XCEXP (INSN, 7, JUMP_INSN)
/* Once basic blocks are found in flow.c,
each CODE_LABEL starts a chain that goes through
all the LABEL_REFs that jump to that label.
The chain eventually winds up at the CODE_LABEL: it is circular. */
#define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
/* This is the field in the LABEL_REF through which the circular chain
of references to a particular label is linked.
This chain is set up in flow.c. */
#define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
/* Once basic blocks are found in flow.c,
Each LABEL_REF points to its containing instruction with this field. */
#define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
the number the register originally had; for a pseudo register turned into
a hard reg this will hold the old pseudo register number. */
#define REGNO(RTX) XCUINT (RTX, 0, REG)
#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
is the current function's return value. */
#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
#define REG_USERVAR_P(RTX) ((RTX)->volatil)
/* 1 in a REG rtx if the register is a pointer. */
#define REG_POINTER(RTX) ((RTX)->frame_related)
/* 1 if the given register REG corresponds to a hard register. */
#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
/* 1 if the given register number REG_NO corresponds to a hard register. */
#define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
/* For a CONST_INT rtx, INTVAL extracts the integer. */
#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
/* For a CONST_DOUBLE:
The usual two ints that hold the value.
For a DImode, that is all there are;
and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
For a float, the number of ints varies,
and CONST_DOUBLE_LOW is the one that should come first *in memory*.
So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
#define CONST_DOUBLE_LOW(r) XCWINT (r, 1, CONST_DOUBLE)
#define CONST_DOUBLE_HIGH(r) XCWINT (r, 2, CONST_DOUBLE)
/* Link for chain of all CONST_DOUBLEs in use in current function. */
#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 0, CONST_DOUBLE)
/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
SUBREG_BYTE extracts the byte-number. */
#define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
#define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
/* in rtlanal.c */
extern unsigned int subreg_lsb PARAMS ((rtx));
extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
enum machine_mode,
unsigned int,
enum machine_mode));
extern unsigned int subreg_regno PARAMS ((rtx));
/* 1 if the REG contained in SUBREG_REG is already known to be
sign- or zero-extended from the mode of the SUBREG to the mode of
the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
extension.
When used as a LHS, is means that this extension must be done
when assigning to SUBREG_REG. */
#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
/* Access various components of an ASM_OPERANDS rtx. */
#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
XCVECEXP (RTX, 4, N, ASM_OPERANDS)
#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
/* For a MEM RTX, 1 if we should keep the alias set for this mem
unchanged when we access a component. Set to 1, or example, when we
are already in a non-addressable component of an aggregate. */
#define MEM_KEEP_ALIAS_SET_P(RTX) ((RTX)->jump)
/* For a MEM rtx, 1 if it's a volatile reference.
Also in an ASM_OPERANDS rtx. */
#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
/* For a MEM rtx, 1 if it refers to an aggregate, either to the
aggregate itself of to a field of the aggregate. If zero, RTX may
or may not be such a reference. */
#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
not refer to a scalar. */
#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
RTX. Otherwise, vice versa. Use this macro only when you are
*sure* that you know that the MEM is in a structure, or is a
scalar. VAL is evaluated only once. */
#define MEM_SET_IN_STRUCT_P(RTX, VAL) \
do { \
if (VAL) \
{ \
MEM_IN_STRUCT_P (RTX) = 1; \
MEM_SCALAR_P (RTX) = 0; \
} \
else \
{ \
MEM_IN_STRUCT_P (RTX) = 0; \
MEM_SCALAR_P (RTX) = 1; \
} \
} while (0)
/* The memory attribute block. We provide access macros for each value
in the block and provide defaults if none specified. */
#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
set, and may alias anything. Otherwise, the MEM can only alias
MEMs in the same alias set. This value is set in a
language-dependent manner in the front-end, and should not be
altered in the back-end. These set numbers are tested for zero,
and compared for equality; they have no other significance. In
some front-ends, these numbers may correspond in some way to types,
or other language-level entities, but they need not, and the
back-end makes no such assumptions. */
#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
/* For a MEM rtx, the decl it is known to refer to, if it is known to
refer to part of a DECL. It may also be a COMPONENT_REF. */
#define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
/* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
RTX that is always a CONST_INT. */
#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
is always a CONST_INT. */
#define MEM_SIZE(RTX) \
(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
: GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
: 0)
/* For a MEM rtx, the alignment in bits. We can use the alignment of the
mode as a default when STRICT_ALIGNMENT, but not if not. */
#define MEM_ALIGN(RTX) \
(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
: (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
/* Copy the attributes that apply to memory locations from RHS to LHS. */
#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
(MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
/* For a LABEL_REF, 1 means that this reference is to a label outside the
loop containing the reference. */
#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
/* For a LABEL_REF, 1 means it is for a nonlocal label. */
/* Likewise in an EXPR_LIST for a REG_LABEL note. */
#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
/* For a CODE_LABEL, 1 means always consider this label to be needed. */
#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
/* For a REG, 1 means the register is used only in an exit test of a loop. */
#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
/* During sched, for an insn, 1 means that the insn must be scheduled together
with the preceding insn. */
#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
cost of the dependence link. The cost of executing an instruction
may vary based on how the results are used. LINK_COST_ZERO is 1 when
the cost through the link varies and is unchanged (i.e., the link has
zero additional cost). LINK_COST_FREE is 1 when the cost through the
link is zero (i.e., the link makes the cost free). In other cases,
the adjustment to the cost is recomputed each time it is needed. */
#define LINK_COST_ZERO(X) ((X)->jump)
#define LINK_COST_FREE(X) ((X)->call)
/* For a SET rtx, SET_DEST is the place that is set
and SET_SRC is the value it is set to. */
#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
#define SET_IS_RETURN_P(RTX) ((RTX)->jump)
/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
#define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
#define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
conditionally executing the code on, COND_EXEC_CODE is the code
to execute if the condition is true. */
#define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
#define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
/* Flag in a SYMBOL_REF for machine-specific purposes. */
#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
#define SYMBOL_REF_USED(RTX) ((RTX)->used)
/* 1 means a SYMBOL_REF is weak. */
#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
/* Define a macro to look for REG_INC notes,
but save time on machines where they never exist. */
/* Don't continue this line--convex cc version 4.1 would lose. */
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
#define FIND_REG_INC_NOTE(INSN, REG) \
((REG) != NULL_RTX && REG_P ((REG)) \
? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
: find_reg_note ((INSN), REG_INC, (REG)))
#else
#define FIND_REG_INC_NOTE(INSN, REG) 0
#endif
/* Indicate whether the machine has any sort of auto increment addressing.
If not, we can avoid checking for REG_INC notes. */
/* Don't continue this line--convex cc version 4.1 would lose. */
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
#define AUTO_INC_DEC
#endif
#ifndef HAVE_PRE_INCREMENT
#define HAVE_PRE_INCREMENT 0
#endif
#ifndef HAVE_PRE_DECREMENT
#define HAVE_PRE_DECREMENT 0
#endif
#ifndef HAVE_POST_INCREMENT
#define HAVE_POST_INCREMENT 0
#endif
#ifndef HAVE_POST_DECREMENT
#define HAVE_POST_DECREMENT 0
#endif
#ifndef HAVE_POST_MODIFY_DISP
#define HAVE_POST_MODIFY_DISP 0
#endif
#ifndef HAVE_POST_MODIFY_REG
#define HAVE_POST_MODIFY_REG 0
#endif
#ifndef HAVE_PRE_MODIFY_DISP
#define HAVE_PRE_MODIFY_DISP 0
#endif
#ifndef HAVE_PRE_MODIFY_REG
#define HAVE_PRE_MODIFY_REG 0
#endif
/* Some architectures do not have complete pre/post increment/decrement
instruction sets, or only move some modes efficiently. These macros
allow us to tune autoincrement generation. */
#ifndef USE_LOAD_POST_INCREMENT
#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
#endif
#ifndef USE_LOAD_POST_DECREMENT
#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
#endif
#ifndef USE_LOAD_PRE_INCREMENT
#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
#endif
#ifndef USE_LOAD_PRE_DECREMENT
#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
#endif
#ifndef USE_STORE_POST_INCREMENT
#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
#endif
#ifndef USE_STORE_POST_DECREMENT
#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
#endif
#ifndef USE_STORE_PRE_INCREMENT
#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
#endif
#ifndef USE_STORE_PRE_DECREMENT
#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
#endif
/* Accessors for RANGE_INFO. */
/* For RANGE_{START,END} notes return the RANGE_START note. */
#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
/* For RANGE_{START,END} notes return the RANGE_START note. */
#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
/* For RANGE_{START,END} notes, return the vector containing the registers used
in the range. */
#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
/* For RANGE_{START,END} notes, the number of calls within the range. */
#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
/* For RANGE_{START,END} notes, the number of insns within the range. */
#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
/* For RANGE_{START,END} notes, a unique # to identify this range. */
#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
/* For RANGE_{START,END} notes, the basic block # the range starts with. */
#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
/* For RANGE_{START,END} notes, the basic block # the range ends with. */
#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
/* For RANGE_{START,END} notes, the loop depth the range is in. */
#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
/* For RANGE_{START,END} notes, the bitmap of live registers at the start
of the range. */
#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
/* For RANGE_{START,END} notes, the bitmap of live registers at the end
of the range. */
#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
/* For RANGE_START notes, the marker # of the start of the range. */
#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
/* For RANGE_START notes, the marker # of the end of the range. */
#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
/* Original pseudo register # for a live range note. */
#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
/* Pseudo register # original register is copied into or -1. */
#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
/* How many times a register in a live range note was referenced. */
#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
/* How many times a register in a live range note was set. */
#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
/* How many times a register in a live range note died. */
#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
/* Whether the original value is needed to be copied into the range register at
the start of the range. */
#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
/* # of insns the register copy is live over. */
#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
/* # of calls the register copy is live over. */
#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
/* DECL_NODE pointer of the declaration if the register is a user defined
variable. */
#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
/* BLOCK_NODE pointer to the block the variable is declared in if the
register is a user defined variable. */
#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
/* EXPR_LIST of the distinct ranges a variable is in. */
#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
/* Block a variable is declared in. */
#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
/* # of distinct ranges a variable is in. */
#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
/* For a NOTE_INSN_LIVE note, the original basic block number. */
#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
/* Determine if the insn is a PHI node. */
#define PHI_NODE_P(X) \
((X) && GET_CODE (X) == INSN \
&& GET_CODE (PATTERN (X)) == SET \
&& GET_CODE (SET_SRC (PATTERN (X))) == PHI)
/* Nonzero if we need to distinguish between the return value of this function
and the return value of a function called by this function. This helps
integrate.c.
This is 1 until after the rtl generation pass. */
extern int rtx_equal_function_value_matters;
/* Nonzero when we are generating CONCATs. */
extern int generating_concat_p;
/* Generally useful functions. */
/* In expmed.c */
extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
#define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
/* In builtins.c */
extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
/* In explow.c */
extern void set_stack_check_libfunc PARAMS ((rtx));
extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
enum machine_mode));
extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
extern void optimize_save_area_alloca PARAMS ((rtx));
/* In emit-rtl.c */
extern rtx gen_rtx PARAMS ((enum rtx_code,
enum machine_mode, ...));
extern rtvec gen_rtvec PARAMS ((int, ...));
extern rtx copy_insn_1 PARAMS ((rtx));
extern rtx copy_insn PARAMS ((rtx));
/* In rtl.c */
extern rtx rtx_alloc PARAMS ((RTX_CODE));
extern rtvec rtvec_alloc PARAMS ((int));
extern rtx copy_rtx PARAMS ((rtx));
/* In emit-rtl.c */
extern rtx copy_rtx_if_shared PARAMS ((rtx));
/* In rtl.c */
extern rtx copy_most_rtx PARAMS ((rtx, rtx));
extern rtx shallow_copy_rtx PARAMS ((rtx));
extern int rtx_equal_p PARAMS ((rtx, rtx));
/* In emit-rtl.c */
extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
extern rtx gen_label_rtx PARAMS ((void));
extern int subreg_hard_regno PARAMS ((rtx, int));
extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
/* In cse.c */
extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
/* In emit-rtl.c */
extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
enum machine_mode, rtx));
extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
enum machine_mode));
extern rtx constant_subword PARAMS ((rtx, int,
enum machine_mode));
/* In emit-rtl.c */
extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
enum machine_mode));
extern int subreg_lowpart_p PARAMS ((rtx));
extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
enum machine_mode));
extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
enum machine_mode));
extern rtx make_safe_from PARAMS ((rtx, rtx));
extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
extern rtx get_insns PARAMS ((void));
extern const char *get_insn_name PARAMS ((int));
extern rtx get_last_insn PARAMS ((void));
extern rtx get_last_insn_anywhere PARAMS ((void));
extern void start_sequence PARAMS ((void));
extern void push_to_sequence PARAMS ((rtx));
extern void end_sequence PARAMS ((void));
extern void push_to_full_sequence PARAMS ((rtx, rtx));
extern void end_full_sequence PARAMS ((rtx*, rtx*));
extern rtx gen_sequence PARAMS ((void));
/* In varasm.c */
extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
extern rtx mem_for_const_double PARAMS ((rtx));
extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
/* In varasm.c */
extern rtx get_pool_constant PARAMS ((rtx));
extern enum machine_mode get_pool_mode PARAMS ((rtx));
extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
extern int get_pool_offset PARAMS ((rtx));
extern rtx simplify_subtraction PARAMS ((rtx));
/* In function.c */
extern rtx assign_stack_local PARAMS ((enum machine_mode,
HOST_WIDE_INT, int));
extern rtx assign_stack_temp PARAMS ((enum machine_mode,
HOST_WIDE_INT, int));
extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode,
HOST_WIDE_INT, int, tree));
extern rtx assign_temp PARAMS ((tree, int, int, int));
/* In emit-rtl.c */
extern rtx emit_insn_before PARAMS ((rtx, rtx));
extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
extern rtx emit_barrier_before PARAMS ((rtx));
extern rtx emit_label_before PARAMS ((rtx, rtx));
extern rtx emit_note_before PARAMS ((int, rtx));
extern rtx emit_insn_after PARAMS ((rtx, rtx));
extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
extern rtx emit_barrier_after PARAMS ((rtx));
extern rtx emit_label_after PARAMS ((rtx, rtx));
extern rtx emit_note_after PARAMS ((int, rtx));
extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
extern rtx emit_insn PARAMS ((rtx));
extern rtx emit_insns PARAMS ((rtx));
extern rtx emit_insns_before PARAMS ((rtx, rtx));
extern rtx emit_insns_after PARAMS ((rtx, rtx));
extern rtx emit_jump_insn PARAMS ((rtx));
extern rtx emit_call_insn PARAMS ((rtx));
extern rtx emit_label PARAMS ((rtx));
extern rtx emit_barrier PARAMS ((void));
extern rtx emit_line_note PARAMS ((const char *, int));
extern rtx emit_note PARAMS ((const char *, int));
extern rtx emit_line_note_force PARAMS ((const char *, int));
extern rtx make_insn_raw PARAMS ((rtx));
extern rtx previous_insn PARAMS ((rtx));
extern rtx next_insn PARAMS ((rtx));
extern rtx prev_nonnote_insn PARAMS ((rtx));
extern rtx next_nonnote_insn PARAMS ((rtx));
extern rtx prev_real_insn PARAMS ((rtx));
extern rtx next_real_insn PARAMS ((rtx));
extern rtx prev_active_insn PARAMS ((rtx));
extern rtx next_active_insn PARAMS ((rtx));
extern int active_insn_p PARAMS ((rtx));
extern rtx prev_label PARAMS ((rtx));
extern rtx next_label PARAMS ((rtx));
extern rtx next_cc0_user PARAMS ((rtx));
extern rtx prev_cc0_setter PARAMS ((rtx));
/* In jump.c */
extern rtx next_nondeleted_insn PARAMS ((rtx));
extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
extern void mark_jump_label PARAMS ((rtx, rtx, int));
extern void cleanup_barriers PARAMS ((void));
/* In jump.c */
extern bool squeeze_notes PARAMS ((rtx *, rtx *));
extern rtx delete_related_insns PARAMS ((rtx));
extern void delete_jump PARAMS ((rtx));
extern void delete_barrier PARAMS ((rtx));
extern rtx get_label_before PARAMS ((rtx));
extern rtx get_label_after PARAMS ((rtx));
extern rtx follow_jumps PARAMS ((rtx));
/* In recog.c */
extern rtx *find_constant_term_loc PARAMS ((rtx *));
/* In emit-rtl.c */
extern rtx try_split PARAMS ((rtx, rtx, int));
extern int split_branch_probability;
/* In unknown file */
extern rtx split_insns PARAMS ((rtx, rtx));
/* In simplify-rtx.c */
extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
enum machine_mode, rtx,
enum machine_mode));
extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
enum machine_mode, rtx,
rtx));
extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
enum machine_mode,
enum machine_mode, rtx, rtx,
rtx));
extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
enum machine_mode, rtx,
rtx));
extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
enum machine_mode,
rtx, rtx));
extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
enum machine_mode, rtx,
enum machine_mode));
extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
enum machine_mode,
enum machine_mode,
rtx, rtx, rtx));
extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
enum machine_mode,
enum machine_mode,
rtx, rtx));
extern rtx simplify_subreg PARAMS ((enum machine_mode,
rtx,
enum machine_mode,
unsigned int));
extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
rtx,
enum machine_mode,
unsigned int));
extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
extern rtx simplify_rtx PARAMS ((rtx));
extern rtx avoid_constant_pool_reference PARAMS ((rtx));
/* In function.c */
extern rtx gen_mem_addressof PARAMS ((rtx, tree));
/* In regclass.c */
extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
unsigned int));
/* In emit-rtl.c */
extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
/* Functions in rtlanal.c */
/* Single set is implemented as macro for performance reasons. */
#define single_set(I) (INSN_P (I) \
? (GET_CODE (PATTERN (I)) == SET \
? PATTERN (I) : single_set_1 (I)) \
: NULL_RTX)
#define single_set_1(I) single_set_2 (I, PATTERN (I))
extern int rtx_addr_can_trap_p PARAMS ((rtx));
extern int rtx_unstable_p PARAMS ((rtx));
extern int rtx_varies_p PARAMS ((rtx, int));
extern int rtx_addr_varies_p PARAMS ((rtx, int));
extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
extern rtx get_related_value PARAMS ((rtx));
extern rtx get_jump_table_offset PARAMS ((rtx, rtx *));
extern int reg_mentioned_p PARAMS ((rtx, rtx));
extern int count_occurrences PARAMS ((rtx, rtx, int));
extern int reg_referenced_p PARAMS ((rtx, rtx));
extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
extern int commutative_operand_precedence PARAMS ((rtx));
extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
extern int modified_between_p PARAMS ((rtx, rtx, rtx));
extern int no_labels_between_p PARAMS ((rtx, rtx));
extern int no_jumps_between_p PARAMS ((rtx, rtx));
extern int modified_in_p PARAMS ((rtx, rtx));
extern int insn_dependent_p PARAMS ((rtx, rtx));
extern int reg_set_p PARAMS ((rtx, rtx));
extern rtx single_set_2 PARAMS ((rtx, rtx));
extern int multiple_sets PARAMS ((rtx));
extern int set_noop_p PARAMS ((rtx));
extern int noop_move_p PARAMS ((rtx));
extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
rtx, rtx *));
extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
extern rtx set_of PARAMS ((rtx, rtx));
extern void note_stores PARAMS ((rtx,
void (*) (rtx, rtx, void *),
void *));
extern void note_uses PARAMS ((rtx *,
void (*) (rtx *, void *),
void *));
extern rtx reg_set_last PARAMS ((rtx, rtx));
extern int dead_or_set_p PARAMS ((rtx, rtx));
extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
unsigned int));
extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
unsigned int));
extern void remove_note PARAMS ((rtx, rtx));
extern int side_effects_p PARAMS ((rtx));
extern int volatile_refs_p PARAMS ((rtx));
extern int volatile_insn_p PARAMS ((rtx));
extern int may_trap_p PARAMS ((rtx));
extern int inequality_comparisons_p PARAMS ((rtx));
extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
int));
extern int computed_jump_p PARAMS ((rtx));
typedef int (*rtx_function) PARAMS ((rtx *, void *));
extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
extern rtx regno_use_in PARAMS ((unsigned int, rtx));
extern int auto_inc_p PARAMS ((rtx));
extern int in_expr_list_p PARAMS ((rtx, rtx));
extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
/* flow.c */
extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
void init_EXPR_INSN_LIST_cache PARAMS ((void));
void free_EXPR_LIST_list PARAMS ((rtx *));
void free_INSN_LIST_list PARAMS ((rtx *));
void free_EXPR_LIST_node PARAMS ((rtx));
void free_INSN_LIST_node PARAMS ((rtx));
rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
/* regclass.c */
/* Maximum number of parallel sets and clobbers in any insn in this fn.
Always at least 3, since the combiner could put that many togetherm
and we want this to remain correct for all the remaining passes. */
extern int max_parallel;
/* Free up register info memory. */
extern void free_reg_info PARAMS ((void));
/* recog.c */
extern int asm_noperands PARAMS ((rtx));
extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
const char **,
enum machine_mode *));
extern enum reg_class reg_preferred_class PARAMS ((int));
extern enum reg_class reg_alternate_class PARAMS ((int));
extern rtx get_first_nonparm_insn PARAMS ((void));
extern void split_all_insns PARAMS ((int));
extern void split_all_insns_noflow PARAMS ((void));
#define MAX_SAVED_CONST_INT 64
extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
extern rtx const_true_rtx;
extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
same as VOIDmode. */
#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
/* Likewise, for the constants 1 and 2. */
#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
is used to represent the frame pointer. This is because the
hard frame pointer and the automatic variables are separated by an amount
that cannot be determined until after register allocation. We can assume
that in this case ELIMINABLE_REGS will be defined, one action of which
will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
#ifndef HARD_FRAME_POINTER_REGNUM
#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
#endif
/* Index labels for global_rtl. */
enum global_rtl_index
{
GR_PC,
GR_CC0,
GR_STACK_POINTER,
GR_FRAME_POINTER,
/* For register elimination to work properly these hard_frame_pointer_rtx,
frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
the same register. */
#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
GR_ARG_POINTER = GR_FRAME_POINTER,
#endif
#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
#else
GR_HARD_FRAME_POINTER,
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
#else
GR_ARG_POINTER,
#endif
#endif
GR_VIRTUAL_INCOMING_ARGS,
GR_VIRTUAL_STACK_ARGS,
GR_VIRTUAL_STACK_DYNAMIC,
GR_VIRTUAL_OUTGOING_ARGS,
GR_VIRTUAL_CFA,
GR_MAX
};
/* Pointers to standard pieces of rtx are stored here. */
extern rtx global_rtl[GR_MAX];
/* Standard pieces of rtx, to be substituted directly into things. */
#define pc_rtx (global_rtl[GR_PC])
#define cc0_rtx (global_rtl[GR_CC0])
/* All references to certain hard regs, except those created
by allocating pseudo regs into them (when that's possible),
go through these unique rtx objects. */
#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
extern rtx pic_offset_table_rtx;
extern rtx struct_value_rtx;
extern rtx struct_value_incoming_rtx;
extern rtx static_chain_rtx;
extern rtx static_chain_incoming_rtx;
extern rtx return_address_pointer_rtx;
/* Include the RTL generation functions. */
#ifndef NO_GENRTL_H
#include "genrtl.h"
#endif
/* There are some RTL codes that require special attention; the
generation functions included above do the raw handling. If you
add to this list, modify special_rtx in gengenrtl.c as well. You
should also modify gen_rtx to use the special function. */
extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode,
HOST_WIDE_INT, HOST_WIDE_INT));
extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
/* We need the cast here to ensure that we get the same result both with
and without prototypes. */
#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
/* Virtual registers are used during RTL generation to refer to locations into
the stack frame when the actual location isn't known until RTL generation
is complete. The routine instantiate_virtual_regs replaces these with
the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
a constant. */
#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
/* This points to the first word of the incoming arguments passed on the stack,
either by the caller or by the callee when pretending it was passed by the
caller. */
#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
variable on the stack. Otherwise, it points to the first variable on
the stack. */
#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
/* This points to the location of dynamically-allocated memory on the stack
immediately after the stack pointer has been adjusted by the amount
desired. */
#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
/* This points to the location in the stack at which outgoing arguments should
be written when the stack is pre-pushed (arguments pushed using push
insns always use sp). */
#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
/* This points to the Canonical Frame Address of the function. This
should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
but is calculated relative to the arg pointer for simplicity; the
frame pointer nor stack pointer are necessarily fixed relative to
the CFA until after reload. */
#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
/* Nonzero if REGNUM is a pointer into the stack frame. */
#define REGNO_PTR_FRAME_P(REGNUM) \
((REGNUM) == STACK_POINTER_REGNUM \
|| (REGNUM) == FRAME_POINTER_REGNUM \
|| (REGNUM) == HARD_FRAME_POINTER_REGNUM \
|| (REGNUM) == ARG_POINTER_REGNUM \
|| ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
&& (REGNUM) <= LAST_VIRTUAL_REGISTER))
/* REGNUM never really appearing in the INSN stream. */
#define INVALID_REGNUM (~(unsigned int) 0)
extern rtx find_next_ref PARAMS ((rtx, rtx));
extern rtx output_constant_def PARAMS ((tree, int));
extern rtx immed_real_const PARAMS ((tree));
/* Define a default value for STORE_FLAG_VALUE. */
#ifndef STORE_FLAG_VALUE
#define STORE_FLAG_VALUE 1
#endif
/* Nonzero after the second flow pass has completed.
Set to 1 or 0 by toplev.c */
extern int flow2_completed;
/* Nonzero after end of reload pass.
Set to 1 or 0 by reload1.c. */
extern int reload_completed;
/* Set to 1 while reload_as_needed is operating.
Required by some machines to handle any generated moves differently. */
extern int reload_in_progress;
/* If this is nonzero, we do not bother generating VOLATILE
around volatile memory references, and we are willing to
output indirect addresses. If cse is to follow, we reject
indirect addresses so a useful potential cse is generated;
if it is used only once, instruction combination will produce
the same indirect address eventually. */
extern int cse_not_expected;
/* Set to nonzero before life analysis to indicate that it is unsafe to
generate any new pseudo registers. */
extern int no_new_pseudos;
/* Translates rtx code to tree code, for those codes needed by
REAL_ARITHMETIC. The function returns an int because the caller may not
know what `enum tree_code' means. */
extern int rtx_to_tree_code PARAMS ((enum rtx_code));
/* In tree.c */
struct obstack;
extern void gcc_obstack_init PARAMS ((struct obstack *));
/* In cse.c */
struct cse_basic_block_data;
/* Return the right cost to give to an operation
to make the cost of the corresponding register-to-register instruction
N times that of a fast register-to-register instruction. */
#define COSTS_N_INSNS(N) ((N) * 4)
/* Maximum cost of a rtl expression. This value has the special meaning
not to use an rtx with this cost under any circumstances. */
#define MAX_COST INT_MAX
extern int rtx_cost PARAMS ((rtx, enum rtx_code));
extern int address_cost PARAMS ((rtx, enum machine_mode));
extern void delete_trivially_dead_insns PARAMS ((rtx, int, int));
#ifdef BUFSIZ
extern int cse_main PARAMS ((rtx, int, int, FILE *));
#endif
extern void cse_end_of_basic_block PARAMS ((rtx,
struct cse_basic_block_data *,
int, int, int));
/* In jump.c */
extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
extern int condjump_p PARAMS ((rtx));
extern int any_condjump_p PARAMS ((rtx));
extern int any_uncondjump_p PARAMS ((rtx));
extern int safe_to_remove_jump_p PARAMS ((rtx));
extern rtx pc_set PARAMS ((rtx));
extern rtx condjump_label PARAMS ((rtx));
extern int simplejump_p PARAMS ((rtx));
extern int returnjump_p PARAMS ((rtx));
extern int onlyjump_p PARAMS ((rtx));
extern int only_sets_cc0_p PARAMS ((rtx));
extern int sets_cc0_p PARAMS ((rtx));
extern int invert_jump_1 PARAMS ((rtx, rtx));
extern int invert_jump PARAMS ((rtx, rtx, int));
extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
extern int true_regnum PARAMS ((rtx));
extern int redirect_jump_1 PARAMS ((rtx, rtx));
extern int redirect_jump PARAMS ((rtx, rtx, int));
extern void rebuild_jump_labels PARAMS ((rtx));
extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
rtx, rtx, rtx));
extern void delete_for_peephole PARAMS ((rtx, rtx));
extern int condjump_in_parallel_p PARAMS ((rtx));
extern void never_reached_warning PARAMS ((rtx));
extern void purge_line_number_notes PARAMS ((rtx));
extern void copy_loop_headers PARAMS ((rtx));
/* In emit-rtl.c. */
extern int max_reg_num PARAMS ((void));
extern int max_label_num PARAMS ((void));
extern int get_first_label_num PARAMS ((void));
extern void delete_insns_since PARAMS ((rtx));
extern void mark_reg_pointer PARAMS ((rtx, int));
extern void mark_user_reg PARAMS ((rtx));
extern void reset_used_flags PARAMS ((rtx));
extern void reorder_insns PARAMS ((rtx, rtx, rtx));
extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
extern int get_max_uid PARAMS ((void));
extern int in_sequence_p PARAMS ((void));
extern void force_next_line_note PARAMS ((void));
extern void clear_emit_caches PARAMS ((void));
extern void init_emit PARAMS ((void));
extern void init_emit_once PARAMS ((int));
extern void push_topmost_sequence PARAMS ((void));
extern void pop_topmost_sequence PARAMS ((void));
extern int subreg_realpart_p PARAMS ((rtx));
extern void reverse_comparison PARAMS ((rtx));
extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
extern void set_new_first_and_last_label_num PARAMS ((int, int));
extern void set_new_last_label_num PARAMS ((int));
extern void unshare_all_rtl_again PARAMS ((rtx));
extern void set_last_insn PARAMS ((rtx));
extern void link_cc0_insns PARAMS ((rtx));
extern void add_insn PARAMS ((rtx));
extern void add_insn_before PARAMS ((rtx, rtx));
extern void add_insn_after PARAMS ((rtx, rtx));
extern void remove_insn PARAMS ((rtx));
extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
extern enum rtx_code classify_insn PARAMS ((rtx));
extern rtx emit PARAMS ((rtx));
/* Query and clear/ restore no_line_numbers. This is used by the
switch / case handling in stmt.c to give proper line numbers in
warnings about unreachable code. */
int force_line_numbers PARAMS ((void));
void restore_line_number_status PARAMS ((int old_value));
extern void renumber_insns PARAMS ((FILE *));
extern void remove_unnecessary_notes PARAMS ((void));
extern rtx delete_insn PARAMS ((rtx));
extern void delete_insn_chain PARAMS ((rtx, rtx));
/* In combine.c */
extern int combine_instructions PARAMS ((rtx, unsigned int));
extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
extern rtx remove_death PARAMS ((unsigned int, rtx));
#ifdef BUFSIZ
extern void dump_combine_stats PARAMS ((FILE *));
extern void dump_combine_total_stats PARAMS ((FILE *));
#endif
/* In sched.c. */
#ifdef BUFSIZ
extern void schedule_insns PARAMS ((FILE *));
extern void schedule_ebbs PARAMS ((FILE *));
#endif
extern void fix_sched_param PARAMS ((const char *, const char *));
/* In print-rtl.c */
extern const char *print_rtx_head;
extern void debug_rtx PARAMS ((rtx));
extern void debug_rtx_list PARAMS ((rtx, int));
extern void debug_rtx_range PARAMS ((rtx, rtx));
extern rtx debug_rtx_find PARAMS ((rtx, int));
#ifdef BUFSIZ
extern void print_mem_expr PARAMS ((FILE *, tree));
extern void print_rtl PARAMS ((FILE *, rtx));
extern void print_simple_rtl PARAMS ((FILE *, rtx));
extern int print_rtl_single PARAMS ((FILE *, rtx));
extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
#endif
/* In loop.c */
extern void init_loop PARAMS ((void));
extern rtx libcall_other_reg PARAMS ((rtx, rtx));
#ifdef BUFSIZ
extern void loop_optimize PARAMS ((rtx, FILE *, int));
#endif
extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
/* In function.c */
extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
extern int prologue_epilogue_contains PARAMS ((rtx));
extern int sibcall_epilogue_contains PARAMS ((rtx));
extern void preserve_rtl_expr_result PARAMS ((rtx));
extern void mark_temp_addr_taken PARAMS ((rtx));
extern void update_temp_slot_address PARAMS ((rtx, rtx));
extern void purge_addressof PARAMS ((rtx));
extern void purge_hard_subreg_sets PARAMS ((rtx));
/* In stmt.c */
extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
extern void expand_null_return PARAMS ((void));
extern void emit_jump PARAMS ((rtx));
extern int preserve_subexpressions_p PARAMS ((void));
/* In expr.c */
extern void move_by_pieces PARAMS ((rtx, rtx,
unsigned HOST_WIDE_INT,
unsigned int));
/* In flow.c */
extern void recompute_reg_usage PARAMS ((rtx, int));
extern int initialize_uninitialized_subregs PARAMS ((void));
#ifdef BUFSIZ
extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
extern void dump_flow_info PARAMS ((FILE *));
#endif
/* In expmed.c */
extern void init_expmed PARAMS ((void));
extern void expand_inc PARAMS ((rtx, rtx));
extern void expand_dec PARAMS ((rtx, rtx));
extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
unsigned HOST_WIDE_INT, rtx,
int, int));
/* In gcse.c */
#ifdef BUFSIZ
extern int gcse_main PARAMS ((rtx, FILE *));
#endif
/* In global.c */
extern void mark_elimination PARAMS ((int, int));
#ifdef BUFSIZ
extern int global_alloc PARAMS ((FILE *));
extern void dump_global_regs PARAMS ((FILE *));
#endif
#ifdef HARD_CONST
extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
#endif
extern void build_insn_chain PARAMS ((rtx));
/* In regclass.c */
extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
extern void globalize_reg PARAMS ((int));
extern void init_regs PARAMS ((void));
extern void init_reg_sets PARAMS ((void));
extern void regset_release_memory PARAMS ((void));
extern void regclass_init PARAMS ((void));
extern void regclass PARAMS ((rtx, int, FILE *));
extern void reg_scan PARAMS ((rtx, unsigned int, int));
extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
extern void fix_register PARAMS ((const char *, int, int));
extern void delete_null_pointer_checks PARAMS ((rtx));
/* In regmove.c */
#ifdef BUFSIZ
extern void regmove_optimize PARAMS ((rtx, int, FILE *));
#endif
extern void combine_stack_adjustments PARAMS ((void));
/* In reorg.c */
#ifdef BUFSIZ
extern void dbr_schedule PARAMS ((rtx, FILE *));
#endif
/* In local-alloc.c */
#ifdef BUFSIZ
extern void dump_local_alloc PARAMS ((FILE *));
#endif
extern int local_alloc PARAMS ((void));
extern int function_invariant_p PARAMS ((rtx));
/* In profile.c */
extern void init_branch_prob PARAMS ((const char *));
extern void branch_prob PARAMS ((void));
extern void end_branch_prob PARAMS ((void));
extern void output_func_start_profiler PARAMS ((void));
/* In reg-stack.c */
#ifdef BUFSIZ
extern void reg_to_stack PARAMS ((rtx, FILE *));
#endif
/* In fold-const.c */
extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
unsigned HOST_WIDE_INT, HOST_WIDE_INT,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *));
extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *));
extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
HOST_WIDE_INT,
unsigned HOST_WIDE_INT, HOST_WIDE_INT,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *));
extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, unsigned int,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *, int));
extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, unsigned int,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *, int));
extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, unsigned int,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *));
extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, unsigned int,
unsigned HOST_WIDE_INT *,
HOST_WIDE_INT *));
/* In calls.c */
enum libcall_type
{
LCT_NORMAL = 0,
LCT_CONST = 1,
LCT_PURE = 2,
LCT_CONST_MAKE_BLOCK = 3,
LCT_PURE_MAKE_BLOCK = 4,
LCT_NORETURN = 5,
LCT_THROW = 6,
LCT_ALWAYS_RETURN = 7,
LCT_RETURNS_TWICE = 8
};
extern void emit_library_call PARAMS ((rtx, enum libcall_type,
enum machine_mode, int,
...));
extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
enum machine_mode, int,
...));
/* In unroll.c */
extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
/* In varasm.c */
extern int in_data_section PARAMS ((void));
extern void init_varasm_once PARAMS ((void));
/* In rtl.c */
extern void init_rtl PARAMS ((void));
extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
void *));
struct md_constant { char *name, *value; };
#ifdef BUFSIZ
extern int read_skip_spaces PARAMS ((FILE *));
extern rtx read_rtx PARAMS ((FILE *));
#endif
extern const char *read_rtx_filename;
extern int read_rtx_lineno;
/* Redefine abort to report an internal error w/o coredump, and
reporting the location of the error in the source file. This logic
is duplicated in rtl.h and tree.h because every file that needs the
special abort includes one or both. toplev.h gets too few files,
system.h gets too many. */
extern void fancy_abort PARAMS ((const char *, int, const char *))
ATTRIBUTE_NORETURN;
#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
/* In alias.c */
extern void clear_reg_alias_info PARAMS ((rtx));
extern rtx canon_rtx PARAMS ((rtx));
extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
int (*)(rtx, int)));
extern rtx get_addr PARAMS ((rtx));
extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
rtx, int (*)(rtx, int)));
extern int read_dependence PARAMS ((rtx, rtx));
extern int anti_dependence PARAMS ((rtx, rtx));
extern int output_dependence PARAMS ((rtx, rtx));
extern void mark_constant_function PARAMS ((void));
extern void init_alias_once PARAMS ((void));
extern void init_alias_analysis PARAMS ((void));
extern void end_alias_analysis PARAMS ((void));
extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
/* In sibcall.c */
typedef enum {
sibcall_use_normal = 1,
sibcall_use_tail_recursion,
sibcall_use_sibcall
} sibcall_use_t;
extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
#ifdef STACK_REGS
extern int stack_regs_mentioned PARAMS ((rtx insn));
#endif
/* In toplev.c */
extern rtx stack_limit_rtx;
/* In regrename.c */
extern void regrename_optimize PARAMS ((void));
extern void copyprop_hardreg_forward PARAMS ((void));
/* In ifcvt.c */
extern void if_convert PARAMS ((int));
/* In predict.c */
extern void invert_br_probabilities PARAMS ((rtx));
extern bool expensive_function_p PARAMS ((int));
#endif /* ! GCC_RTL_H */
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