1/* Print RTL for GCC.
2   Copyright (C) 1987-2015 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3.  If not see
18<http://www.gnu.org/licenses/>.  */
19
20/* This file is compiled twice: once for the generator programs,
21   once for the compiler.  */
22#ifdef GENERATOR_FILE
23#include "bconfig.h"
24#else
25#include "config.h"
26#endif
27
28#include "system.h"
29#include "coretypes.h"
30#include "tm.h"
31#include "rtl.h"
32
33/* These headers all define things which are not available in
34   generator programs.  */
35#ifndef GENERATOR_FILE
36#include "hash-set.h"
37#include "machmode.h"
38#include "vec.h"
39#include "double-int.h"
40#include "input.h"
41#include "alias.h"
42#include "symtab.h"
43#include "wide-int.h"
44#include "inchash.h"
45#include "tree.h"
46#include "print-tree.h"
47#include "flags.h"
48#include "hard-reg-set.h"
49#include "predict.h"
50#include "input.h"
51#include "function.h"
52#include "basic-block.h"
53#include "diagnostic.h"
54#include "tree-pretty-print.h"
55#include "cselib.h"
56#include "dumpfile.h"	/* for dump_flags */
57#include "dwarf2out.h"
58#endif
59
60static FILE *outfile;
61
62static int sawclose = 0;
63
64static int indent;
65
66static bool in_call_function_usage;
67
68static void print_rtx (const_rtx);
69
70/* String printed at beginning of each RTL when it is dumped.
71   This string is set to ASM_COMMENT_START when the RTL is dumped in
72   the assembly output file.  */
73const char *print_rtx_head = "";
74
75#ifdef GENERATOR_FILE
76/* These are defined from the .opt file when not used in generator
77   programs.  */
78
79/* Nonzero means suppress output of instruction numbers
80   in debugging dumps.
81   This must be defined here so that programs like gencodes can be linked.  */
82int flag_dump_unnumbered = 0;
83
84/* Nonzero means suppress output of instruction numbers for previous
85   and next insns in debugging dumps.
86   This must be defined here so that programs like gencodes can be linked.  */
87int flag_dump_unnumbered_links = 0;
88#endif
89
90/* Nonzero means use simplified format without flags, modes, etc.  */
91int flag_simple = 0;
92
93#ifndef GENERATOR_FILE
94void
95print_mem_expr (FILE *outfile, const_tree expr)
96{
97  fputc (' ', outfile);
98  print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
99}
100#endif
101
102/* Print IN_RTX onto OUTFILE.  This is the recursive part of printing.  */
103
104static void
105print_rtx (const_rtx in_rtx)
106{
107  int i = 0;
108  int j;
109  const char *format_ptr;
110  int is_insn;
111
112  if (sawclose)
113    {
114      if (flag_simple)
115	fputc (' ', outfile);
116      else
117	fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
118      sawclose = 0;
119    }
120
121  if (in_rtx == 0)
122    {
123      fputs ("(nil)", outfile);
124      sawclose = 1;
125      return;
126    }
127  else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
128    {
129       fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
130		print_rtx_head, indent * 2, "");
131       sawclose = 1;
132       return;
133    }
134
135  is_insn = INSN_P (in_rtx);
136
137  /* Print name of expression code.  */
138  if (flag_simple && CONST_INT_P (in_rtx))
139    fputc ('(', outfile);
140  else
141    fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
142
143  if (! flag_simple)
144    {
145      if (RTX_FLAG (in_rtx, in_struct))
146	fputs ("/s", outfile);
147
148      if (RTX_FLAG (in_rtx, volatil))
149	fputs ("/v", outfile);
150
151      if (RTX_FLAG (in_rtx, unchanging))
152	fputs ("/u", outfile);
153
154      if (RTX_FLAG (in_rtx, frame_related))
155	fputs ("/f", outfile);
156
157      if (RTX_FLAG (in_rtx, jump))
158	fputs ("/j", outfile);
159
160      if (RTX_FLAG (in_rtx, call))
161	fputs ("/c", outfile);
162
163      if (RTX_FLAG (in_rtx, return_val))
164	fputs ("/i", outfile);
165
166      /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
167      if ((GET_CODE (in_rtx) == EXPR_LIST
168	   || GET_CODE (in_rtx) == INSN_LIST
169	   || GET_CODE (in_rtx) == INT_LIST)
170	  && (int)GET_MODE (in_rtx) < REG_NOTE_MAX
171	  && !in_call_function_usage)
172	fprintf (outfile, ":%s",
173		 GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
174
175      /* For other rtl, print the mode if it's not VOID.  */
176      else if (GET_MODE (in_rtx) != VOIDmode)
177	fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
178
179#ifndef GENERATOR_FILE
180      if (GET_CODE (in_rtx) == VAR_LOCATION)
181	{
182	  if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
183	    fputs (" <debug string placeholder>", outfile);
184	  else
185	    print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
186	  fputc (' ', outfile);
187	  print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
188	  if (PAT_VAR_LOCATION_STATUS (in_rtx)
189	      == VAR_INIT_STATUS_UNINITIALIZED)
190	    fprintf (outfile, " [uninit]");
191	  sawclose = 1;
192	  i = GET_RTX_LENGTH (VAR_LOCATION);
193	}
194#endif
195    }
196
197#ifndef GENERATOR_FILE
198  if (CONST_DOUBLE_AS_FLOAT_P (in_rtx))
199    i = 5;
200#endif
201
202  if (INSN_CHAIN_CODE_P (GET_CODE (in_rtx)))
203    {
204      if (flag_dump_unnumbered)
205	fprintf (outfile, " #");
206      else
207	fprintf (outfile, " %d", INSN_UID (in_rtx));
208    }
209
210  /* Get the format string and skip the first elements if we have handled
211     them already.  */
212  format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
213  for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
214    switch (*format_ptr++)
215      {
216	const char *str;
217
218      case 'T':
219	str = XTMPL (in_rtx, i);
220	goto string;
221
222      case 'S':
223      case 's':
224	str = XSTR (in_rtx, i);
225      string:
226
227	if (str == 0)
228	  fputs (" \"\"", outfile);
229	else
230	  fprintf (outfile, " (\"%s\")", str);
231	sawclose = 1;
232	break;
233
234	/* 0 indicates a field for internal use that should not be printed.
235	   An exception is the third field of a NOTE, where it indicates
236	   that the field has several different valid contents.  */
237      case '0':
238#ifndef GENERATOR_FILE
239	if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
240	  {
241	    int flags = SYMBOL_REF_FLAGS (in_rtx);
242	    if (flags)
243	      fprintf (outfile, " [flags %#x]", flags);
244	    tree decl = SYMBOL_REF_DECL (in_rtx);
245	    if (decl)
246	      print_node_brief (outfile, "", decl, dump_flags);
247	  }
248	else if (i == 3 && NOTE_P (in_rtx))
249	  {
250	    switch (NOTE_KIND (in_rtx))
251	      {
252	      case NOTE_INSN_EH_REGION_BEG:
253	      case NOTE_INSN_EH_REGION_END:
254		if (flag_dump_unnumbered)
255		  fprintf (outfile, " #");
256		else
257		  fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
258		sawclose = 1;
259		break;
260
261	      case NOTE_INSN_BLOCK_BEG:
262	      case NOTE_INSN_BLOCK_END:
263		dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
264		sawclose = 1;
265		break;
266
267	      case NOTE_INSN_BASIC_BLOCK:
268		{
269		  basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
270		  if (bb != 0)
271		    fprintf (outfile, " [bb %d]", bb->index);
272		  break;
273	        }
274
275	      case NOTE_INSN_DELETED_LABEL:
276	      case NOTE_INSN_DELETED_DEBUG_LABEL:
277		{
278		  const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
279		  if (label)
280		    fprintf (outfile, " (\"%s\")", label);
281		  else
282		    fprintf (outfile, " \"\"");
283		}
284		break;
285
286	      case NOTE_INSN_SWITCH_TEXT_SECTIONS:
287		{
288		  basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
289		  if (bb != 0)
290		    fprintf (outfile, " [bb %d]", bb->index);
291		  break;
292		}
293
294	      case NOTE_INSN_VAR_LOCATION:
295	      case NOTE_INSN_CALL_ARG_LOCATION:
296		fputc (' ', outfile);
297		print_rtx (NOTE_VAR_LOCATION (in_rtx));
298		break;
299
300	      case NOTE_INSN_CFI:
301		fputc ('\n', outfile);
302		output_cfi_directive (outfile, NOTE_CFI (in_rtx));
303		fputc ('\t', outfile);
304		break;
305
306	      default:
307		break;
308	      }
309	  }
310	else if (i == 7 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
311	  {
312	    /* Output the JUMP_LABEL reference.  */
313	    fprintf (outfile, "\n%s%*s -> ", print_rtx_head, indent * 2, "");
314	    if (GET_CODE (JUMP_LABEL (in_rtx)) == RETURN)
315	      fprintf (outfile, "return");
316	    else if (GET_CODE (JUMP_LABEL (in_rtx)) == SIMPLE_RETURN)
317	      fprintf (outfile, "simple_return");
318	    else
319	      fprintf (outfile, "%d", INSN_UID (JUMP_LABEL (in_rtx)));
320	  }
321	else if (i == 0 && GET_CODE (in_rtx) == VALUE)
322	  {
323	    cselib_val *val = CSELIB_VAL_PTR (in_rtx);
324
325	    fprintf (outfile, " %u:%u", val->uid, val->hash);
326	    dump_addr (outfile, " @", in_rtx);
327	    dump_addr (outfile, "/", (void*)val);
328	  }
329	else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
330	  {
331	    fprintf (outfile, " D#%i",
332		     DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
333	  }
334	else if (i == 0 && GET_CODE (in_rtx) == ENTRY_VALUE)
335	  {
336	    indent += 2;
337	    if (!sawclose)
338	      fprintf (outfile, " ");
339	    print_rtx (ENTRY_VALUE_EXP (in_rtx));
340	    indent -= 2;
341	  }
342#endif
343	break;
344
345      case 'e':
346      do_e:
347	indent += 2;
348	if (i == 6 && INSN_P (in_rtx))
349	  /* Put REG_NOTES on their own line.  */
350	  fprintf (outfile, "\n%s%*s",
351		   print_rtx_head, indent * 2, "");
352	if (!sawclose)
353	  fprintf (outfile, " ");
354	if (i == 7 && CALL_P (in_rtx))
355	  {
356	    in_call_function_usage = true;
357	    print_rtx (XEXP (in_rtx, i));
358	    in_call_function_usage = false;
359	  }
360	else
361	  print_rtx (XEXP (in_rtx, i));
362	indent -= 2;
363	break;
364
365      case 'E':
366      case 'V':
367	indent += 2;
368	if (sawclose)
369	  {
370	    fprintf (outfile, "\n%s%*s",
371		     print_rtx_head, indent * 2, "");
372	    sawclose = 0;
373	  }
374	fputs (" [", outfile);
375	if (NULL != XVEC (in_rtx, i))
376	  {
377	    indent += 2;
378	    if (XVECLEN (in_rtx, i))
379	      sawclose = 1;
380
381	    for (j = 0; j < XVECLEN (in_rtx, i); j++)
382	      print_rtx (XVECEXP (in_rtx, i, j));
383
384	    indent -= 2;
385	  }
386	if (sawclose)
387	  fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
388
389	fputs ("]", outfile);
390	sawclose = 1;
391	indent -= 2;
392	break;
393
394      case 'w':
395	if (! flag_simple)
396	  fprintf (outfile, " ");
397	fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
398	if (! flag_simple)
399	  fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
400		   (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
401	break;
402
403      case 'i':
404	if (i == 4 && INSN_P (in_rtx))
405	  {
406#ifndef GENERATOR_FILE
407	    const rtx_insn *in_insn = as_a <const rtx_insn *> (in_rtx);
408
409	    /*  Pretty-print insn locations.  Ignore scoping as it is mostly
410		redundant with line number information and do not print anything
411		when there is no location information available.  */
412	    if (INSN_HAS_LOCATION (in_insn))
413	      {
414		expanded_location xloc = insn_location (in_insn);
415		fprintf (outfile, " %s:%i", xloc.file, xloc.line);
416	      }
417#endif
418	  }
419	else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
420	  {
421#ifndef GENERATOR_FILE
422	    if (ASM_OPERANDS_SOURCE_LOCATION (in_rtx) != UNKNOWN_LOCATION)
423	      fprintf (outfile, " %s:%i",
424		       LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
425		       LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
426#endif
427	  }
428	else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
429	  {
430#ifndef GENERATOR_FILE
431	    if (ASM_INPUT_SOURCE_LOCATION (in_rtx) != UNKNOWN_LOCATION)
432	      fprintf (outfile, " %s:%i",
433		       LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
434		       LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
435#endif
436	  }
437	else if (i == 5 && NOTE_P (in_rtx))
438	  {
439	    /* This field is only used for NOTE_INSN_DELETED_LABEL, and
440	       other times often contains garbage from INSN->NOTE death.  */
441	    if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
442		|| NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
443	      fprintf (outfile, " %d",  XINT (in_rtx, i));
444	  }
445#if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
446	else if (i == 1
447		 && GET_CODE (in_rtx) == UNSPEC_VOLATILE
448		 && XINT (in_rtx, 1) >= 0
449		 && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
450	  fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
451#endif
452#if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
453	else if (i == 1
454		 && (GET_CODE (in_rtx) == UNSPEC
455		     || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
456		 && XINT (in_rtx, 1) >= 0
457		 && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
458	  fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
459#endif
460	else
461	  {
462	    int value = XINT (in_rtx, i);
463	    const char *name;
464
465#ifndef GENERATOR_FILE
466	    if (REG_P (in_rtx) && (unsigned) value < FIRST_PSEUDO_REGISTER)
467	      fprintf (outfile, " %d %s", value, reg_names[value]);
468	    else if (REG_P (in_rtx)
469		     && (unsigned) value <= LAST_VIRTUAL_REGISTER)
470	      {
471		if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
472		  fprintf (outfile, " %d virtual-incoming-args", value);
473		else if (value == VIRTUAL_STACK_VARS_REGNUM)
474		  fprintf (outfile, " %d virtual-stack-vars", value);
475		else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
476		  fprintf (outfile, " %d virtual-stack-dynamic", value);
477		else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
478		  fprintf (outfile, " %d virtual-outgoing-args", value);
479		else if (value == VIRTUAL_CFA_REGNUM)
480		  fprintf (outfile, " %d virtual-cfa", value);
481		else if (value == VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM)
482		  fprintf (outfile, " %d virtual-preferred-stack-boundary",
483			   value);
484		else
485		  fprintf (outfile, " %d virtual-reg-%d", value,
486			   value-FIRST_VIRTUAL_REGISTER);
487	      }
488	    else
489#endif
490	      if (flag_dump_unnumbered
491		     && (is_insn || NOTE_P (in_rtx)))
492	      fputc ('#', outfile);
493	    else
494	      fprintf (outfile, " %d", value);
495
496#ifndef GENERATOR_FILE
497	    if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
498	      {
499		fputs (" [", outfile);
500		if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
501		  fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
502		if (REG_EXPR (in_rtx))
503		  print_mem_expr (outfile, REG_EXPR (in_rtx));
504
505		if (REG_OFFSET (in_rtx))
506		  fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
507			   REG_OFFSET (in_rtx));
508		fputs (" ]", outfile);
509	      }
510	    if (REG_P (in_rtx) && REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
511	      fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
512#endif
513
514	    if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
515		&& XINT (in_rtx, i) >= 0
516		&& (name = get_insn_name (XINT (in_rtx, i))) != NULL)
517	      fprintf (outfile, " {%s}", name);
518	    sawclose = 0;
519	  }
520	break;
521
522      /* Print NOTE_INSN names rather than integer codes.  */
523
524      case 'n':
525	fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
526	sawclose = 0;
527	break;
528
529      case 'u':
530	if (XEXP (in_rtx, i) != NULL)
531	  {
532	    rtx sub = XEXP (in_rtx, i);
533	    enum rtx_code subc = GET_CODE (sub);
534
535	    if (GET_CODE (in_rtx) == LABEL_REF)
536	      {
537		if (subc == NOTE
538		    && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
539		  {
540		    if (flag_dump_unnumbered)
541		      fprintf (outfile, " [# deleted]");
542		    else
543		      fprintf (outfile, " [%d deleted]", INSN_UID (sub));
544		    sawclose = 0;
545		    break;
546		  }
547
548		if (subc != CODE_LABEL)
549		  goto do_e;
550	      }
551
552	    if (flag_dump_unnumbered
553		|| (flag_dump_unnumbered_links && (i == 1 || i == 2)
554		    && (INSN_P (in_rtx) || NOTE_P (in_rtx)
555			|| LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
556	      fputs (" #", outfile);
557	    else
558	      fprintf (outfile, " %d", INSN_UID (sub));
559	  }
560	else
561	  fputs (" 0", outfile);
562	sawclose = 0;
563	break;
564
565      case 't':
566#ifndef GENERATOR_FILE
567	if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
568	  print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
569	else if (i == 0 && GET_CODE (in_rtx) == DEBUG_PARAMETER_REF)
570	  print_mem_expr (outfile, DEBUG_PARAMETER_REF_DECL (in_rtx));
571	else
572	  dump_addr (outfile, " ", XTREE (in_rtx, i));
573#endif
574	break;
575
576      case '*':
577	fputs (" Unknown", outfile);
578	sawclose = 0;
579	break;
580
581      case 'B':
582#ifndef GENERATOR_FILE
583	if (XBBDEF (in_rtx, i))
584	  fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
585#endif
586	break;
587
588      default:
589	gcc_unreachable ();
590      }
591
592  switch (GET_CODE (in_rtx))
593    {
594#ifndef GENERATOR_FILE
595    case MEM:
596      if (__builtin_expect (final_insns_dump_p, false))
597	fprintf (outfile, " [");
598      else
599	fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
600		 (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
601
602      if (MEM_EXPR (in_rtx))
603	print_mem_expr (outfile, MEM_EXPR (in_rtx));
604      else
605	fputc (' ', outfile);
606
607      if (MEM_OFFSET_KNOWN_P (in_rtx))
608	fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC, MEM_OFFSET (in_rtx));
609
610      if (MEM_SIZE_KNOWN_P (in_rtx))
611	fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC, MEM_SIZE (in_rtx));
612
613      if (MEM_ALIGN (in_rtx) != 1)
614	fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
615
616      if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
617	fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
618
619      fputc (']', outfile);
620      break;
621
622    case CONST_DOUBLE:
623      if (FLOAT_MODE_P (GET_MODE (in_rtx)))
624	{
625	  char s[60];
626
627	  real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
628			   sizeof (s), 0, 1);
629	  fprintf (outfile, " %s", s);
630
631	  real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
632			       sizeof (s), 0, 1);
633	  fprintf (outfile, " [%s]", s);
634	}
635      break;
636
637    case CONST_WIDE_INT:
638      fprintf (outfile, " ");
639      cwi_output_hex (outfile, in_rtx);
640      break;
641#endif
642
643    case CODE_LABEL:
644      fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
645      switch (LABEL_KIND (in_rtx))
646	{
647	  case LABEL_NORMAL: break;
648	  case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
649	  case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
650	  case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
651	  default: gcc_unreachable ();
652	}
653      break;
654
655    default:
656      break;
657    }
658
659  fputc (')', outfile);
660  sawclose = 1;
661}
662
663/* Print an rtx on the current line of FILE.  Initially indent IND
664   characters.  */
665
666void
667print_inline_rtx (FILE *outf, const_rtx x, int ind)
668{
669  int oldsaw = sawclose;
670  int oldindent = indent;
671
672  sawclose = 0;
673  indent = ind;
674  outfile = outf;
675  print_rtx (x);
676  sawclose = oldsaw;
677  indent = oldindent;
678}
679
680/* Call this function from the debugger to see what X looks like.  */
681
682DEBUG_FUNCTION void
683debug_rtx (const_rtx x)
684{
685  outfile = stderr;
686  sawclose = 0;
687  print_rtx (x);
688  fprintf (stderr, "\n");
689}
690
691/* Dump rtx REF.  */
692
693DEBUG_FUNCTION void
694debug (const rtx_def &ref)
695{
696  debug_rtx (&ref);
697}
698
699DEBUG_FUNCTION void
700debug (const rtx_def *ptr)
701{
702  if (ptr)
703    debug (*ptr);
704  else
705    fprintf (stderr, "<nil>\n");
706}
707
708/* Count of rtx's to print with debug_rtx_list.
709   This global exists because gdb user defined commands have no arguments.  */
710
711DEBUG_VARIABLE int debug_rtx_count = 0;	/* 0 is treated as equivalent to 1 */
712
713/* Call this function to print list from X on.
714
715   N is a count of the rtx's to print. Positive values print from the specified
716   rtx_insn on.  Negative values print a window around the rtx_insn.
717   EG: -5 prints 2 rtx_insn's on either side (in addition to the specified
718   rtx_insn).  */
719
720DEBUG_FUNCTION void
721debug_rtx_list (const rtx_insn *x, int n)
722{
723  int i,count;
724  const rtx_insn *insn;
725
726  count = n == 0 ? 1 : n < 0 ? -n : n;
727
728  /* If we are printing a window, back up to the start.  */
729
730  if (n < 0)
731    for (i = count / 2; i > 0; i--)
732      {
733	if (PREV_INSN (x) == 0)
734	  break;
735	x = PREV_INSN (x);
736      }
737
738  for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
739    {
740      debug_rtx (insn);
741      fprintf (stderr, "\n");
742    }
743}
744
745/* Call this function to print an rtx_insn list from START to END
746   inclusive.  */
747
748DEBUG_FUNCTION void
749debug_rtx_range (const rtx_insn *start, const rtx_insn *end)
750{
751  while (1)
752    {
753      debug_rtx (start);
754      fprintf (stderr, "\n");
755      if (!start || start == end)
756	break;
757      start = NEXT_INSN (start);
758    }
759}
760
761/* Call this function to search an rtx_insn list to find one with insn uid UID,
762   and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
763   The found insn is returned to enable further debugging analysis.  */
764
765DEBUG_FUNCTION const_rtx
766debug_rtx_find (const rtx_insn *x, int uid)
767{
768  while (x != 0 && INSN_UID (x) != uid)
769    x = NEXT_INSN (x);
770  if (x != 0)
771    {
772      debug_rtx_list (x, debug_rtx_count);
773      return x;
774    }
775  else
776    {
777      fprintf (stderr, "insn uid %d not found\n", uid);
778      return 0;
779    }
780}
781
782/* External entry point for printing a chain of insns
783   starting with RTX_FIRST onto file OUTF.
784   A blank line separates insns.
785
786   If RTX_FIRST is not an insn, then it alone is printed, with no newline.  */
787
788void
789print_rtl (FILE *outf, const_rtx rtx_first)
790{
791  const rtx_insn *tmp_rtx;
792
793  outfile = outf;
794  sawclose = 0;
795
796  if (rtx_first == 0)
797    {
798      fputs (print_rtx_head, outf);
799      fputs ("(nil)\n", outf);
800    }
801  else
802    switch (GET_CODE (rtx_first))
803      {
804      case INSN:
805      case JUMP_INSN:
806      case CALL_INSN:
807      case NOTE:
808      case CODE_LABEL:
809      case JUMP_TABLE_DATA:
810      case BARRIER:
811	for (tmp_rtx = as_a <const rtx_insn *> (rtx_first);
812	     tmp_rtx != 0;
813	     tmp_rtx = NEXT_INSN (tmp_rtx))
814	  {
815	    fputs (print_rtx_head, outfile);
816	    print_rtx (tmp_rtx);
817	    fprintf (outfile, "\n");
818	  }
819	break;
820
821      default:
822	fputs (print_rtx_head, outfile);
823	print_rtx (rtx_first);
824      }
825}
826
827/* Like print_rtx, except specify a file.  */
828/* Return nonzero if we actually printed anything.  */
829
830int
831print_rtl_single (FILE *outf, const_rtx x)
832{
833  return print_rtl_single_with_indent (outf, x, 0);
834}
835
836/* Like print_rtl_single, except specify a file and indentation.  */
837
838int
839print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
840{
841  int old_indent = indent;
842  char *s_indent = (char *) alloca ((size_t) ind + 1);
843  memset ((void *) s_indent, ' ', (size_t) ind);
844  s_indent[ind] = '\0';
845
846  indent = ind;
847  outfile = outf;
848  sawclose = 0;
849  fputs (s_indent, outfile);
850  fputs (print_rtx_head, outfile);
851  print_rtx (x);
852  putc ('\n', outf);
853  indent = old_indent;
854  return 1;
855}
856
857
858/* Like print_rtl except without all the detail; for example,
859   if RTX is a CONST_INT then print in decimal format.  */
860
861void
862print_simple_rtl (FILE *outf, const_rtx x)
863{
864  flag_simple = 1;
865  print_rtl (outf, x);
866  flag_simple = 0;
867}
868