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freebsd/contrib/gcc/print-rtl.c

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/* Print RTL for GNU C Compiler.
Copyright (C) 1987, 1988, 1992, 1997, 1998, 1999, 2000
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. */
#include "config.h"
#include "system.h"
#include "rtl.h"
/* We don't want the tree code checking code for the access to the
DECL_NAME to be included in the gen* programs. */
#undef ENABLE_TREE_CHECKING
#include "tree.h"
#include "real.h"
#include "flags.h"
#include "hard-reg-set.h"
#include "basic-block.h"
/* How to print out a register name.
We don't use PRINT_REG because some definitions of PRINT_REG
don't work here. */
#ifndef DEBUG_PRINT_REG
#define DEBUG_PRINT_REG(RTX, CODE, FILE) \
fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)])
#endif
/* Array containing all of the register names */
#ifdef DEBUG_REGISTER_NAMES
static const char * const debug_reg_names[] = DEBUG_REGISTER_NAMES;
#define reg_names debug_reg_names
#else
const char * reg_names[] = REGISTER_NAMES;
#endif
static FILE *outfile;
static int sawclose = 0;
static int indent;
static void print_rtx PARAMS ((rtx));
/* String printed at beginning of each RTL when it is dumped.
This string is set to ASM_COMMENT_START when the RTL is dumped in
the assembly output file. */
const char *print_rtx_head = "";
/* Nonzero means suppress output of instruction numbers and line number
notes in debugging dumps.
This must be defined here so that programs like gencodes can be linked. */
int flag_dump_unnumbered = 0;
/* Nonzero means use simplified format without flags, modes, etc. */
int flag_simple = 0;
/* Nonzero if we are dumping graphical description. */
int dump_for_graph;
/* Nonzero to dump all call_placeholder alternatives. */
static int debug_call_placeholder_verbose;
void
print_mem_expr (outfile, expr)
FILE *outfile;
tree expr;
{
if (TREE_CODE (expr) == COMPONENT_REF)
{
if (TREE_OPERAND (expr, 0))
print_mem_expr (outfile, TREE_OPERAND (expr, 0));
else
fputs (" <variable>", outfile);
if (DECL_NAME (TREE_OPERAND (expr, 1)))
fprintf (outfile, ".%s",
IDENTIFIER_POINTER (DECL_NAME (TREE_OPERAND (expr, 1))));
}
else if (DECL_NAME (expr))
fprintf (outfile, " %s", IDENTIFIER_POINTER (DECL_NAME (expr)));
else if (TREE_CODE (expr) == RESULT_DECL)
fputs (" <result>", outfile);
else
fputs (" <anonymous>", outfile);
}
/* Print IN_RTX onto OUTFILE. This is the recursive part of printing. */
static void
print_rtx (in_rtx)
rtx in_rtx;
{
int i = 0;
int j;
const char *format_ptr;
int is_insn;
rtx tem;
if (sawclose)
{
if (flag_simple)
fputc (' ', outfile);
else
fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
sawclose = 0;
}
if (in_rtx == 0)
{
fputs ("(nil)", outfile);
sawclose = 1;
return;
}
else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
{
fprintf (outfile, "(??? bad code %d\n)", GET_CODE (in_rtx));
sawclose = 1;
return;
}
is_insn = INSN_P (in_rtx);
/* When printing in VCG format we write INSNs, NOTE, LABEL, and BARRIER
in separate nodes and therefore have to handle them special here. */
if (dump_for_graph
&& (is_insn || GET_CODE (in_rtx) == NOTE
|| GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
{
i = 3;
indent = 0;
}
else
{
/* Print name of expression code. */
if (flag_simple && GET_CODE (in_rtx) == CONST_INT)
fputc ('(', outfile);
else
fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
if (! flag_simple)
{
if (in_rtx->in_struct)
fputs ("/s", outfile);
if (in_rtx->volatil)
fputs ("/v", outfile);
if (in_rtx->unchanging)
fputs ("/u", outfile);
if (in_rtx->integrated)
fputs ("/i", outfile);
if (in_rtx->frame_related)
fputs ("/f", outfile);
if (in_rtx->jump)
fputs ("/j", outfile);
if (in_rtx->call)
fputs ("/c", outfile);
if (GET_MODE (in_rtx) != VOIDmode)
{
/* Print REG_NOTE names for EXPR_LIST and INSN_LIST. */
if (GET_CODE (in_rtx) == EXPR_LIST
|| GET_CODE (in_rtx) == INSN_LIST)
fprintf (outfile, ":%s",
GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
else
fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
}
}
}
/* Get the format string and skip the first elements if we have handled
them already. */
format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
switch (*format_ptr++)
{
const char *str;
case 'T':
str = XTMPL (in_rtx, i);
goto string;
case 'S':
case 's':
str = XSTR (in_rtx, i);
string:
if (str == 0)
fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
else
{
if (dump_for_graph)
fprintf (outfile, " (\\\"%s\\\")", str);
else
fprintf (outfile, " (\"%s\")", str);
}
sawclose = 1;
break;
/* 0 indicates a field for internal use that should not be printed.
An exception is the third field of a NOTE, where it indicates
that the field has several different valid contents. */
case '0':
if (i == 1 && GET_CODE (in_rtx) == REG)
{
if (REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
break;
}
if (i == 3 && GET_CODE (in_rtx) == NOTE)
{
switch (NOTE_LINE_NUMBER (in_rtx))
{
case NOTE_INSN_EH_REGION_BEG:
case NOTE_INSN_EH_REGION_END:
if (flag_dump_unnumbered)
fprintf (outfile, " #");
else
fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
sawclose = 1;
break;
case NOTE_INSN_BLOCK_BEG:
case NOTE_INSN_BLOCK_END:
fprintf (outfile, " ");
if (flag_dump_unnumbered)
fprintf (outfile, "#");
else
fprintf (outfile, HOST_PTR_PRINTF,
(char *) NOTE_BLOCK (in_rtx));
sawclose = 1;
break;
case NOTE_INSN_RANGE_BEG:
case NOTE_INSN_RANGE_END:
case NOTE_INSN_LIVE:
indent += 2;
if (!sawclose)
fprintf (outfile, " ");
print_rtx (NOTE_RANGE_INFO (in_rtx));
indent -= 2;
break;
case NOTE_INSN_BASIC_BLOCK:
{
basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
if (bb != 0)
fprintf (outfile, " [bb %d]", bb->index);
break;
}
case NOTE_INSN_EXPECTED_VALUE:
indent += 2;
if (!sawclose)
fprintf (outfile, " ");
print_rtx (NOTE_EXPECTED_VALUE (in_rtx));
indent -= 2;
break;
case NOTE_INSN_DELETED_LABEL:
if (NOTE_SOURCE_FILE (in_rtx))
fprintf (outfile, " (\"%s\")", NOTE_SOURCE_FILE (in_rtx));
else
fprintf (outfile, " \"\"");
break;
default:
{
const char * const str = X0STR (in_rtx, i);
if (NOTE_LINE_NUMBER (in_rtx) < 0)
;
else if (str == 0)
fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
else
{
if (dump_for_graph)
fprintf (outfile, " (\\\"%s\\\")", str);
else
fprintf (outfile, " (\"%s\")", str);
}
break;
}
}
}
break;
case 'e':
do_e:
indent += 2;
if (!sawclose)
fprintf (outfile, " ");
print_rtx (XEXP (in_rtx, i));
indent -= 2;
break;
case 'E':
case 'V':
indent += 2;
if (sawclose)
{
fprintf (outfile, "\n%s%*s",
print_rtx_head, indent * 2, "");
sawclose = 0;
}
fputs ("[ ", outfile);
if (NULL != XVEC (in_rtx, i))
{
indent += 2;
if (XVECLEN (in_rtx, i))
sawclose = 1;
for (j = 0; j < XVECLEN (in_rtx, i); j++)
print_rtx (XVECEXP (in_rtx, i, j));
indent -= 2;
}
if (sawclose)
fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
fputs ("] ", outfile);
sawclose = 1;
indent -= 2;
break;
case 'w':
if (! flag_simple)
fprintf (outfile, " ");
fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
if (! flag_simple)
{
fprintf (outfile, " [");
fprintf (outfile, HOST_WIDE_INT_PRINT_HEX, XWINT (in_rtx, i));
fprintf (outfile, "]");
}
break;
case 'i':
if (i == 5 && GET_CODE (in_rtx) == NOTE)
{
/* This field is only used for NOTE_INSN_DELETED_LABEL, and
other times often contains garbage from INSN->NOTE death. */
if (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_DELETED_LABEL)
fprintf (outfile, " %d", XINT (in_rtx, i));
}
else
{
int value = XINT (in_rtx, i);
const char *name;
if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
{
fputc (' ', outfile);
DEBUG_PRINT_REG (in_rtx, 0, outfile);
}
else if (GET_CODE (in_rtx) == REG
&& value <= LAST_VIRTUAL_REGISTER)
{
if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
fprintf (outfile, " %d virtual-incoming-args", value);
else if (value == VIRTUAL_STACK_VARS_REGNUM)
fprintf (outfile, " %d virtual-stack-vars", value);
else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
fprintf (outfile, " %d virtual-stack-dynamic", value);
else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
fprintf (outfile, " %d virtual-outgoing-args", value);
else if (value == VIRTUAL_CFA_REGNUM)
fprintf (outfile, " %d virtual-cfa", value);
else
fprintf (outfile, " %d virtual-reg-%d", value,
value-FIRST_VIRTUAL_REGISTER);
}
else if (flag_dump_unnumbered
&& (is_insn || GET_CODE (in_rtx) == NOTE))
fputc ('#', outfile);
else
fprintf (outfile, " %d", value);
if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
&& XINT (in_rtx, i) >= 0
&& (name = get_insn_name (XINT (in_rtx, i))) != NULL)
fprintf (outfile, " {%s}", name);
sawclose = 0;
}
break;
/* Print NOTE_INSN names rather than integer codes. */
case 'n':
if (XINT (in_rtx, i) >= (int) NOTE_INSN_BIAS
&& XINT (in_rtx, i) < (int) NOTE_INSN_MAX)
fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
else
fprintf (outfile, " %d", XINT (in_rtx, i));
sawclose = 0;
break;
case 'u':
if (XEXP (in_rtx, i) != NULL)
{
rtx sub = XEXP (in_rtx, i);
enum rtx_code subc = GET_CODE (sub);
if (GET_CODE (in_rtx) == LABEL_REF)
{
if (subc == NOTE
&& NOTE_LINE_NUMBER (sub) == NOTE_INSN_DELETED_LABEL)
{
if (flag_dump_unnumbered)
fprintf (outfile, " [# deleted]");
else
fprintf (outfile, " [%d deleted]", INSN_UID (sub));
sawclose = 0;
break;
}
if (subc != CODE_LABEL)
goto do_e;
}
if (flag_dump_unnumbered)
fputs (" #", outfile);
else
fprintf (outfile, " %d", INSN_UID (sub));
}
else
fputs (" 0", outfile);
sawclose = 0;
break;
case 'b':
if (XBITMAP (in_rtx, i) == NULL)
fputs (" {null}", outfile);
else
bitmap_print (outfile, XBITMAP (in_rtx, i), " {", "}");
sawclose = 0;
break;
case 't':
putc (' ', outfile);
fprintf (outfile, HOST_PTR_PRINTF, (char *) XTREE (in_rtx, i));
break;
case '*':
fputs (" Unknown", outfile);
sawclose = 0;
break;
default:
fprintf (stderr,
"switch format wrong in rtl.print_rtx(). format was: %c.\n",
format_ptr[-1]);
abort ();
}
switch (GET_CODE (in_rtx))
{
case MEM:
fputs (" [", outfile);
fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, MEM_ALIAS_SET (in_rtx));
if (MEM_EXPR (in_rtx))
print_mem_expr (outfile, MEM_EXPR (in_rtx));
if (MEM_OFFSET (in_rtx))
{
fputc ('+', outfile);
fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
INTVAL (MEM_OFFSET (in_rtx)));
}
if (MEM_SIZE (in_rtx))
{
fputs (" S", outfile);
fprintf (outfile, HOST_WIDE_INT_PRINT_DEC,
INTVAL (MEM_SIZE (in_rtx)));
}
if (MEM_ALIGN (in_rtx) != 1)
fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
fputc (']', outfile);
break;
#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT && MAX_LONG_DOUBLE_TYPE_SIZE == 64
case CONST_DOUBLE:
if (FLOAT_MODE_P (GET_MODE (in_rtx)))
{
double val;
REAL_VALUE_FROM_CONST_DOUBLE (val, in_rtx);
fprintf (outfile, " [%.16g]", val);
}
break;
#endif
case CODE_LABEL:
fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
if (LABEL_ALTERNATE_NAME (in_rtx))
fprintf (outfile, " [alternate name: %s]",
LABEL_ALTERNATE_NAME (in_rtx));
break;
case CALL_PLACEHOLDER:
if (debug_call_placeholder_verbose)
{
fputs (" (cond [\n (const_string \"normal\") (sequence [", outfile);
for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
{
fputs ("\n ", outfile);
print_inline_rtx (outfile, tem, 4);
}
tem = XEXP (in_rtx, 1);
if (tem)
fputs ("\n ])\n (const_string \"tail_call\") (sequence [",
outfile);
for (; tem != 0; tem = NEXT_INSN (tem))
{
fputs ("\n ", outfile);
print_inline_rtx (outfile, tem, 4);
}
tem = XEXP (in_rtx, 2);
if (tem)
fputs ("\n ])\n (const_string \"tail_recursion\") (sequence [",
outfile);
for (; tem != 0; tem = NEXT_INSN (tem))
{
fputs ("\n ", outfile);
print_inline_rtx (outfile, tem, 4);
}
fputs ("\n ])\n ])", outfile);
break;
}
for (tem = XEXP (in_rtx, 0); tem != 0; tem = NEXT_INSN (tem))
if (GET_CODE (tem) == CALL_INSN)
{
fprintf (outfile, " ");
print_rtx (tem);
break;
}
break;
default:
break;
}
if (dump_for_graph
&& (is_insn || GET_CODE (in_rtx) == NOTE
|| GET_CODE (in_rtx) == CODE_LABEL || GET_CODE (in_rtx) == BARRIER))
sawclose = 0;
else
{
fputc (')', outfile);
sawclose = 1;
}
}
/* Print an rtx on the current line of FILE. Initially indent IND
characters. */
void
print_inline_rtx (outf, x, ind)
FILE *outf;
rtx x;
int ind;
{
int oldsaw = sawclose;
int oldindent = indent;
sawclose = 0;
indent = ind;
outfile = outf;
print_rtx (x);
sawclose = oldsaw;
indent = oldindent;
}
/* Call this function from the debugger to see what X looks like. */
void
debug_rtx (x)
rtx x;
{
outfile = stderr;
print_rtx (x);
fprintf (stderr, "\n");
}
/* Count of rtx's to print with debug_rtx_list.
This global exists because gdb user defined commands have no arguments. */
int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
/* Call this function to print list from X on.
N is a count of the rtx's to print. Positive values print from the specified
rtx on. Negative values print a window around the rtx.
EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */
void
debug_rtx_list (x, n)
rtx x;
int n;
{
int i,count;
rtx insn;
count = n == 0 ? 1 : n < 0 ? -n : n;
/* If we are printing a window, back up to the start. */
if (n < 0)
for (i = count / 2; i > 0; i--)
{
if (PREV_INSN (x) == 0)
break;
x = PREV_INSN (x);
}
for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
debug_rtx (insn);
}
/* Call this function to print an rtx list from START to END inclusive. */
void
debug_rtx_range (start, end)
rtx start, end;
{
while (1)
{
debug_rtx (start);
if (!start || start == end)
break;
start = NEXT_INSN (start);
}
}
/* Call this function to search an rtx list to find one with insn uid UID,
and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
The found insn is returned to enable further debugging analysis. */
rtx
debug_rtx_find (x, uid)
rtx x;
int uid;
{
while (x != 0 && INSN_UID (x) != uid)
x = NEXT_INSN (x);
if (x != 0)
{
debug_rtx_list (x, debug_rtx_count);
return x;
}
else
{
fprintf (stderr, "insn uid %d not found\n", uid);
return 0;
}
}
/* External entry point for printing a chain of insns
starting with RTX_FIRST onto file OUTF.
A blank line separates insns.
If RTX_FIRST is not an insn, then it alone is printed, with no newline. */
void
print_rtl (outf, rtx_first)
FILE *outf;
rtx rtx_first;
{
rtx tmp_rtx;
outfile = outf;
sawclose = 0;
if (rtx_first == 0)
{
fputs (print_rtx_head, outf);
fputs ("(nil)\n", outf);
}
else
switch (GET_CODE (rtx_first))
{
case INSN:
case JUMP_INSN:
case CALL_INSN:
case NOTE:
case CODE_LABEL:
case BARRIER:
for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
if (! flag_dump_unnumbered
|| GET_CODE (tmp_rtx) != NOTE || NOTE_LINE_NUMBER (tmp_rtx) < 0)
{
fputs (print_rtx_head, outfile);
print_rtx (tmp_rtx);
fprintf (outfile, "\n");
}
break;
default:
fputs (print_rtx_head, outfile);
print_rtx (rtx_first);
}
}
/* Like print_rtx, except specify a file. */
/* Return nonzero if we actually printed anything. */
int
print_rtl_single (outf, x)
FILE *outf;
rtx x;
{
outfile = outf;
sawclose = 0;
if (! flag_dump_unnumbered
|| GET_CODE (x) != NOTE || NOTE_LINE_NUMBER (x) < 0)
{
fputs (print_rtx_head, outfile);
print_rtx (x);
putc ('\n', outf);
return 1;
}
return 0;
}
/* Like print_rtl except without all the detail; for example,
if RTX is a CONST_INT then print in decimal format. */
void
print_simple_rtl (outf, x)
FILE *outf;
rtx x;
{
flag_simple = 1;
print_rtl (outf, x);
flag_simple = 0;
}
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