egcs projects compiler system

Exact copy of the snapshot, except for the removal of
	texinfo/
	gcc/ch/
	libchill/

1 files changed, 486 insertions, 0 deletions

diff --git a/gnu/egcs/gcc/print-rtl.c b/gnu/egcs/gcc/print-rtl.c
new file mode 100644
index 00000000000..e097aadfe48
--- /dev/null
+++ b/gnu/egcs/gcc/print-rtl.c
@@ -0,0 +1,486 @@
+/* Print RTL for GNU C Compiler.
+   Copyright (C) 1987, 1988, 1992, 1997, 1998 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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 GNU CC; 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"
+#include "real.h"
+#include "flags.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 char *reg_names[] = DEBUG_REGISTER_NAMES;
+#else
+static char *reg_names[] = REGISTER_NAMES;
+#endif
+
+static FILE *outfile;
+
+static const char xspaces[] = "                                                                                                                                                                ";
+
+static int sawclose = 0;
+
+static int indent;
+
+/* Names for patterns.  Non-zero only when linked with insn-output.c.  */
+
+extern char **insn_name_ptr;
+
+static void print_rtx		PROTO ((rtx));
+
+/* 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 if we are dumping graphical description.  */
+int dump_for_graph;
+
+/* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
+
+static void
+print_rtx (in_rtx)
+     register rtx in_rtx;
+{
+  register int i = 0;
+  register int j;
+  register char *format_ptr;
+  register int is_insn;
+
+  if (sawclose)
+    {
+      fprintf (outfile, "\n%s",
+	       (xspaces + (sizeof xspaces - 1 - indent * 2)));
+      sawclose = 0;
+    }
+
+  if (in_rtx == 0)
+    {
+      fputs ("(nil)", outfile);
+      sawclose = 1;
+      return;
+    }
+
+  is_insn = (GET_RTX_CLASS (GET_CODE (in_rtx)) == 'i');
+
+  /* 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 */
+      fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
+
+      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++)
+      {
+      case 'S':
+      case 's':
+	if (i == 3 && GET_CODE (in_rtx) == NOTE
+	    && (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_EH_REGION_BEG
+		|| NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_EH_REGION_END
+		|| NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_BLOCK_BEG
+		|| NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_BLOCK_END))
+	  {
+	    fprintf (outfile, " %d", NOTE_BLOCK_NUMBER (in_rtx));
+	    sawclose = 1;
+	    break;
+	  }
+
+	if (i == 3 && GET_CODE (in_rtx) == NOTE
+	    && (NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_RANGE_START
+		|| NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_RANGE_END
+		|| NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_LIVE))
+	  {
+	    indent += 2;
+	    if (!sawclose)
+	      fprintf (outfile, " ");
+	    print_rtx (NOTE_RANGE_INFO (in_rtx));
+	    indent -= 2;
+	    break;
+	  }
+
+	if (i == 3 && GET_CODE (in_rtx) == NOTE
+	    && NOTE_LINE_NUMBER (in_rtx) == NOTE_INSN_BASIC_BLOCK)
+	  {
+	    basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
+	    fprintf (outfile, " [bb %d]", bb->index);
+	    break;
+	  }
+
+	if (XSTR (in_rtx, i) == 0)
+	  fputs (dump_for_graph ? " \\\"\\\"" : " \"\"", outfile);
+	else
+	  fprintf (outfile, dump_for_graph ? " (\\\"%s\\\")" : " (\"%s\")",
+		   XSTR (in_rtx, i));
+	sawclose = 1;
+	break;
+
+	/* 0 indicates a field for internal use that should not be printed.  */
+      case '0':
+	break;
+
+      case '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",
+		     (xspaces + (sizeof xspaces - 1 - 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",
+		   (xspaces + (sizeof xspaces - 1 - indent * 2)));
+
+	fputs ("] ", outfile);
+	sawclose = 1;
+	indent -= 2;
+	break;
+
+      case 'w':
+	fprintf (outfile, " ");
+	fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
+	fprintf (outfile, " [");
+	fprintf (outfile, HOST_WIDE_INT_PRINT_HEX, XWINT (in_rtx, i));
+	fprintf (outfile, "]");
+	break;
+
+      case 'i':
+	{
+	  register int value = XINT (in_rtx, i);
+
+	  if (GET_CODE (in_rtx) == REG && value < FIRST_PSEUDO_REGISTER)
+	    {
+	      fputc (' ', outfile);
+	      DEBUG_PRINT_REG (in_rtx, 0, outfile);
+	    }
+	  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)
+	    && insn_name_ptr
+	    && XINT (in_rtx, i) >= 0)
+	  fprintf (outfile, " {%s}", insn_name_ptr[XINT (in_rtx, i)]);
+	sawclose = 0;
+	break;
+
+      /* Print NOTE_INSN names rather than integer codes.  */
+
+      case 'n':
+	if (XINT (in_rtx, i) <= 0)
+	  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)
+	  {
+	    if (flag_dump_unnumbered)
+	      fputc ('#', outfile);
+	    else
+	      fprintf (outfile, " %d", INSN_UID (XEXP (in_rtx, i)));
+	  }
+	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 ();
+      }
+
+  if (GET_CODE (in_rtx) == MEM)
+    fprintf (outfile, " %d", MEM_ALIAS_SET (in_rtx));
+
+#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT && LONG_DOUBLE_TYPE_SIZE == 64
+  if (GET_CODE (in_rtx) == CONST_DOUBLE && FLOAT_MODE_P (GET_MODE (in_rtx)))
+    {
+      double val;
+      REAL_VALUE_FROM_CONST_DOUBLE (val, in_rtx);
+      fprintf (outfile, " [%.16g]", val);
+    }
+#endif
+
+  if (GET_CODE (in_rtx) == CODE_LABEL)
+    fprintf (outfile, " [num uses: %d]", LABEL_NUSES (in_rtx));
+  
+  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 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;
+{
+  register rtx tmp_rtx;
+
+  outfile = outf;
+  sawclose = 0;
+
+  if (rtx_first == 0)
+    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; NULL != tmp_rtx; tmp_rtx = NEXT_INSN (tmp_rtx))
+	  {
+	    if (! flag_dump_unnumbered
+		|| GET_CODE (tmp_rtx) != NOTE
+		|| NOTE_LINE_NUMBER (tmp_rtx) < 0)
+	      {
+		print_rtx (tmp_rtx);
+		fprintf (outfile, "\n");
+	      }
+	  }
+	break;
+
+      default:
+	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)
+    {
+      print_rtx (x);
+      putc ('\n', outf);
+      return 1;
+    }
+  return 0;
+}