333 lines
7.6 KiB
C
333 lines
7.6 KiB
C
/* Print RTL for GNU C Compiler.
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Copyright (C) 1987, 1988, 1992 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "config.h"
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#include <ctype.h>
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#include <stdio.h>
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#include "rtl.h"
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/* How to print out a register name.
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We don't use PRINT_REG because some definitions of PRINT_REG
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don't work here. */
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#ifndef DEBUG_PRINT_REG
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#define DEBUG_PRINT_REG(RTX, CODE, FILE) \
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fprintf ((FILE), "%d %s", REGNO (RTX), reg_names[REGNO (RTX)])
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#endif
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/* Array containing all of the register names */
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#ifdef DEBUG_REGISTER_NAMES
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static char *reg_names[] = DEBUG_REGISTER_NAMES;
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#else
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static char *reg_names[] = REGISTER_NAMES;
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#endif
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static FILE *outfile;
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char spaces[] = " ";
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static int sawclose = 0;
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/* Names for patterns. Non-zero only when linked with insn-output.c. */
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extern char **insn_name_ptr;
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/* Print IN_RTX onto OUTFILE. This is the recursive part of printing. */
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static void
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print_rtx (in_rtx)
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register rtx in_rtx;
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{
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static int indent;
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register int i, j;
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register char *format_ptr;
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register int is_insn;
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if (sawclose)
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{
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fprintf (outfile, "\n%s",
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(spaces + (sizeof spaces - 1 - indent * 2)));
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sawclose = 0;
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}
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if (in_rtx == 0)
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{
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fprintf (outfile, "(nil)");
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sawclose = 1;
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return;
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}
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/* print name of expression code */
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fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
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if (in_rtx->in_struct)
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fprintf (outfile, "/s");
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if (in_rtx->volatil)
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fprintf (outfile, "/v");
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if (in_rtx->unchanging)
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fprintf (outfile, "/u");
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if (in_rtx->integrated)
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fprintf (outfile, "/i");
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if (GET_MODE (in_rtx) != VOIDmode)
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{
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/* Print REG_NOTE names for EXPR_LIST and INSN_LIST. */
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if (GET_CODE (in_rtx) == EXPR_LIST || GET_CODE (in_rtx) == INSN_LIST)
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fprintf (outfile, ":%s", GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
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else
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fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
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}
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is_insn = (GET_RTX_CLASS (GET_CODE (in_rtx)) == 'i');
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format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx));
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for (i = 0; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
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switch (*format_ptr++)
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{
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case 'S':
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case 's':
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if (i == 3 && GET_CODE (in_rtx) == NOTE
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&& (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_EH_REGION_BEG
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|| NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_EH_REGION_END))
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{
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fprintf (outfile, " %d", NOTE_BLOCK_NUMBER (in_rtx));
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sawclose = 1;
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break;
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}
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if (XSTR (in_rtx, i) == 0)
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fprintf (outfile, " \"\"");
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else
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fprintf (outfile, " (\"%s\")", XSTR (in_rtx, i));
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sawclose = 1;
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break;
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/* 0 indicates a field for internal use that should not be printed. */
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case '0':
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break;
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case 'e':
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indent += 2;
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if (!sawclose)
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fprintf (outfile, " ");
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print_rtx (XEXP (in_rtx, i));
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indent -= 2;
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break;
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case 'E':
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case 'V':
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indent += 2;
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if (sawclose)
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{
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fprintf (outfile, "\n%s",
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(spaces + (sizeof spaces - 1 - indent * 2)));
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sawclose = 0;
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}
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fprintf (outfile, "[ ");
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if (NULL != XVEC (in_rtx, i))
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{
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indent += 2;
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if (XVECLEN (in_rtx, i))
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sawclose = 1;
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for (j = 0; j < XVECLEN (in_rtx, i); j++)
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print_rtx (XVECEXP (in_rtx, i, j));
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indent -= 2;
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}
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if (sawclose)
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fprintf (outfile, "\n%s",
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(spaces + (sizeof spaces - 1 - indent * 2)));
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fprintf (outfile, "] ");
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sawclose = 1;
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indent -= 2;
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break;
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case 'w':
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fprintf (outfile, " ");
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fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
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break;
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case 'i':
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{
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register int value = XINT (in_rtx, i);
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if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
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{
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fputc (' ', outfile);
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DEBUG_PRINT_REG (in_rtx, 0, outfile);
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}
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else
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fprintf (outfile, " %d", value);
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}
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if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
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&& insn_name_ptr
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&& XINT (in_rtx, i) >= 0)
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fprintf (outfile, " {%s}", insn_name_ptr[XINT (in_rtx, i)]);
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sawclose = 0;
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break;
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/* Print NOTE_INSN names rather than integer codes. */
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case 'n':
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if (XINT (in_rtx, i) <= 0)
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fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
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else
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fprintf (outfile, " %d", XINT (in_rtx, i));
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sawclose = 0;
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break;
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case 'u':
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if (XEXP (in_rtx, i) != NULL)
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fprintf (outfile, " %d", INSN_UID (XEXP (in_rtx, i)));
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else
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fprintf (outfile, " 0");
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sawclose = 0;
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break;
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case '*':
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fprintf (outfile, " Unknown");
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sawclose = 0;
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break;
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default:
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fprintf (stderr,
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"switch format wrong in rtl.print_rtx(). format was: %c.\n",
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format_ptr[-1]);
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abort ();
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}
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fprintf (outfile, ")");
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sawclose = 1;
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}
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/* Call this function from the debugger to see what X looks like. */
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void
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debug_rtx (x)
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rtx x;
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{
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outfile = stderr;
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print_rtx (x);
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fprintf (stderr, "\n");
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}
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/* Count of rtx's to print with debug_rtx_list.
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This global exists because gdb user defined commands have no arguments. */
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int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
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/* Call this function to print list from X on.
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N is a count of the rtx's to print. Positive values print from the specified
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rtx on. Negative values print a window around the rtx.
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EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */
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void
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debug_rtx_list (x, n)
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rtx x;
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int n;
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{
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int i,count;
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rtx insn;
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count = n == 0 ? 1 : n < 0 ? -n : n;
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/* If we are printing a window, back up to the start. */
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if (n < 0)
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for (i = count / 2; i > 0; i--)
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{
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if (PREV_INSN (x) == 0)
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break;
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x = PREV_INSN (x);
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}
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for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
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debug_rtx (insn);
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}
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/* Call this function to search an rtx list to find one with insn uid UID,
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and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
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The found insn is returned to enable further debugging analysis. */
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rtx
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debug_rtx_find(x, uid)
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rtx x;
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int uid;
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{
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while (x != 0 && INSN_UID (x) != uid)
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x = NEXT_INSN (x);
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if (x != 0)
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{
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debug_rtx_list (x, debug_rtx_count);
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return x;
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}
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else
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{
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fprintf (stderr, "insn uid %d not found\n", uid);
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return 0;
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}
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}
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/* External entry point for printing a chain of insns
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starting with RTX_FIRST onto file OUTF.
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A blank line separates insns.
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If RTX_FIRST is not an insn, then it alone is printed, with no newline. */
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void
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print_rtl (outf, rtx_first)
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FILE *outf;
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rtx rtx_first;
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{
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register rtx tmp_rtx;
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outfile = outf;
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sawclose = 0;
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if (rtx_first == 0)
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fprintf (outf, "(nil)\n");
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else
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switch (GET_CODE (rtx_first))
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{
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case INSN:
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case JUMP_INSN:
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case CALL_INSN:
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case NOTE:
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case CODE_LABEL:
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case BARRIER:
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for (tmp_rtx = rtx_first; NULL != tmp_rtx; tmp_rtx = NEXT_INSN (tmp_rtx))
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{
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print_rtx (tmp_rtx);
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fprintf (outfile, "\n");
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}
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break;
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default:
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print_rtx (rtx_first);
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}
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}
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