PR target/47230
[official-gcc.git] / gcc / print-rtl.c
blob5dc8e94411a0051f500a2f08bc6f3f051e38f38d
1 /* Print RTL for GCC.
2 Copyright (C) 1987-2014 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
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
28 #include "system.h"
29 #include "coretypes.h"
30 #include "tm.h"
31 #include "rtl.h"
33 /* These headers all define things which are not available in
34 generator programs. */
35 #ifndef GENERATOR_FILE
36 #include "tree.h"
37 #include "print-tree.h"
38 #include "flags.h"
39 #include "hard-reg-set.h"
40 #include "basic-block.h"
41 #include "diagnostic.h"
42 #include "tree-pretty-print.h"
43 #include "cselib.h"
44 #include "dumpfile.h" /* for dump_flags */
45 #include "dwarf2out.h"
46 #endif
48 static FILE *outfile;
50 static int sawclose = 0;
52 static int indent;
54 static bool in_call_function_usage;
56 static void print_rtx (const_rtx);
58 /* String printed at beginning of each RTL when it is dumped.
59 This string is set to ASM_COMMENT_START when the RTL is dumped in
60 the assembly output file. */
61 const char *print_rtx_head = "";
63 #ifdef GENERATOR_FILE
64 /* These are defined from the .opt file when not used in generator
65 programs. */
67 /* Nonzero means suppress output of instruction numbers
68 in debugging dumps.
69 This must be defined here so that programs like gencodes can be linked. */
70 int flag_dump_unnumbered = 0;
72 /* Nonzero means suppress output of instruction numbers for previous
73 and next insns in debugging dumps.
74 This must be defined here so that programs like gencodes can be linked. */
75 int flag_dump_unnumbered_links = 0;
76 #endif
78 /* Nonzero means use simplified format without flags, modes, etc. */
79 int flag_simple = 0;
81 #ifndef GENERATOR_FILE
82 void
83 print_mem_expr (FILE *outfile, const_tree expr)
85 fputc (' ', outfile);
86 print_generic_expr (outfile, CONST_CAST_TREE (expr), dump_flags);
88 #endif
90 /* Print IN_RTX onto OUTFILE. This is the recursive part of printing. */
92 static void
93 print_rtx (const_rtx in_rtx)
95 int i = 0;
96 int j;
97 const char *format_ptr;
98 int is_insn;
100 if (sawclose)
102 if (flag_simple)
103 fputc (' ', outfile);
104 else
105 fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
106 sawclose = 0;
109 if (in_rtx == 0)
111 fputs ("(nil)", outfile);
112 sawclose = 1;
113 return;
115 else if (GET_CODE (in_rtx) > NUM_RTX_CODE)
117 fprintf (outfile, "(??? bad code %d\n%s%*s)", GET_CODE (in_rtx),
118 print_rtx_head, indent * 2, "");
119 sawclose = 1;
120 return;
123 is_insn = INSN_P (in_rtx);
125 /* Print name of expression code. */
126 if (flag_simple && CONST_INT_P (in_rtx))
127 fputc ('(', outfile);
128 else
129 fprintf (outfile, "(%s", GET_RTX_NAME (GET_CODE (in_rtx)));
131 if (! flag_simple)
133 if (RTX_FLAG (in_rtx, in_struct))
134 fputs ("/s", outfile);
136 if (RTX_FLAG (in_rtx, volatil))
137 fputs ("/v", outfile);
139 if (RTX_FLAG (in_rtx, unchanging))
140 fputs ("/u", outfile);
142 if (RTX_FLAG (in_rtx, frame_related))
143 fputs ("/f", outfile);
145 if (RTX_FLAG (in_rtx, jump))
146 fputs ("/j", outfile);
148 if (RTX_FLAG (in_rtx, call))
149 fputs ("/c", outfile);
151 if (RTX_FLAG (in_rtx, return_val))
152 fputs ("/i", outfile);
154 /* Print REG_NOTE names for EXPR_LIST and INSN_LIST. */
155 if ((GET_CODE (in_rtx) == EXPR_LIST
156 || GET_CODE (in_rtx) == INSN_LIST
157 || GET_CODE (in_rtx) == INT_LIST)
158 && (int)GET_MODE (in_rtx) < REG_NOTE_MAX
159 && !in_call_function_usage)
160 fprintf (outfile, ":%s",
161 GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
163 /* For other rtl, print the mode if it's not VOID. */
164 else if (GET_MODE (in_rtx) != VOIDmode)
165 fprintf (outfile, ":%s", GET_MODE_NAME (GET_MODE (in_rtx)));
167 #ifndef GENERATOR_FILE
168 if (GET_CODE (in_rtx) == VAR_LOCATION)
170 if (TREE_CODE (PAT_VAR_LOCATION_DECL (in_rtx)) == STRING_CST)
171 fputs (" <debug string placeholder>", outfile);
172 else
173 print_mem_expr (outfile, PAT_VAR_LOCATION_DECL (in_rtx));
174 fputc (' ', outfile);
175 print_rtx (PAT_VAR_LOCATION_LOC (in_rtx));
176 if (PAT_VAR_LOCATION_STATUS (in_rtx)
177 == VAR_INIT_STATUS_UNINITIALIZED)
178 fprintf (outfile, " [uninit]");
179 sawclose = 1;
180 i = GET_RTX_LENGTH (VAR_LOCATION);
182 #endif
185 #ifndef GENERATOR_FILE
186 if (CONST_DOUBLE_AS_FLOAT_P (in_rtx))
187 i = 5;
188 #endif
190 if (INSN_CHAIN_CODE_P (GET_CODE (in_rtx)))
192 if (flag_dump_unnumbered)
193 fprintf (outfile, " #");
194 else
195 fprintf (outfile, " %d", INSN_UID (in_rtx));
198 /* Get the format string and skip the first elements if we have handled
199 them already. */
200 format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)) + i;
201 for (; i < GET_RTX_LENGTH (GET_CODE (in_rtx)); i++)
202 switch (*format_ptr++)
204 const char *str;
206 case 'T':
207 str = XTMPL (in_rtx, i);
208 goto string;
210 case 'S':
211 case 's':
212 str = XSTR (in_rtx, i);
213 string:
215 if (str == 0)
216 fputs (" \"\"", outfile);
217 else
218 fprintf (outfile, " (\"%s\")", str);
219 sawclose = 1;
220 break;
222 /* 0 indicates a field for internal use that should not be printed.
223 An exception is the third field of a NOTE, where it indicates
224 that the field has several different valid contents. */
225 case '0':
226 #ifndef GENERATOR_FILE
227 if (i == 1 && GET_CODE (in_rtx) == SYMBOL_REF)
229 int flags = SYMBOL_REF_FLAGS (in_rtx);
230 if (flags)
231 fprintf (outfile, " [flags %#x]", flags);
232 tree decl = SYMBOL_REF_DECL (in_rtx);
233 if (decl)
234 print_node_brief (outfile, "", decl, dump_flags);
236 else if (i == 3 && NOTE_P (in_rtx))
238 switch (NOTE_KIND (in_rtx))
240 case NOTE_INSN_EH_REGION_BEG:
241 case NOTE_INSN_EH_REGION_END:
242 if (flag_dump_unnumbered)
243 fprintf (outfile, " #");
244 else
245 fprintf (outfile, " %d", NOTE_EH_HANDLER (in_rtx));
246 sawclose = 1;
247 break;
249 case NOTE_INSN_BLOCK_BEG:
250 case NOTE_INSN_BLOCK_END:
251 dump_addr (outfile, " ", NOTE_BLOCK (in_rtx));
252 sawclose = 1;
253 break;
255 case NOTE_INSN_BASIC_BLOCK:
257 basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
258 if (bb != 0)
259 fprintf (outfile, " [bb %d]", bb->index);
260 break;
263 case NOTE_INSN_DELETED_LABEL:
264 case NOTE_INSN_DELETED_DEBUG_LABEL:
266 const char *label = NOTE_DELETED_LABEL_NAME (in_rtx);
267 if (label)
268 fprintf (outfile, " (\"%s\")", label);
269 else
270 fprintf (outfile, " \"\"");
272 break;
274 case NOTE_INSN_SWITCH_TEXT_SECTIONS:
276 basic_block bb = NOTE_BASIC_BLOCK (in_rtx);
277 if (bb != 0)
278 fprintf (outfile, " [bb %d]", bb->index);
279 break;
282 case NOTE_INSN_VAR_LOCATION:
283 case NOTE_INSN_CALL_ARG_LOCATION:
284 fputc (' ', outfile);
285 print_rtx (NOTE_VAR_LOCATION (in_rtx));
286 break;
288 case NOTE_INSN_CFI:
289 fputc ('\n', outfile);
290 output_cfi_directive (outfile, NOTE_CFI (in_rtx));
291 fputc ('\t', outfile);
292 break;
294 default:
295 break;
298 else if (i == 7 && JUMP_P (in_rtx) && JUMP_LABEL (in_rtx) != NULL)
300 /* Output the JUMP_LABEL reference. */
301 fprintf (outfile, "\n%s%*s -> ", print_rtx_head, indent * 2, "");
302 if (GET_CODE (JUMP_LABEL (in_rtx)) == RETURN)
303 fprintf (outfile, "return");
304 else if (GET_CODE (JUMP_LABEL (in_rtx)) == SIMPLE_RETURN)
305 fprintf (outfile, "simple_return");
306 else
307 fprintf (outfile, "%d", INSN_UID (JUMP_LABEL (in_rtx)));
309 else if (i == 0 && GET_CODE (in_rtx) == VALUE)
311 cselib_val *val = CSELIB_VAL_PTR (in_rtx);
313 fprintf (outfile, " %u:%u", val->uid, val->hash);
314 dump_addr (outfile, " @", in_rtx);
315 dump_addr (outfile, "/", (void*)val);
317 else if (i == 0 && GET_CODE (in_rtx) == DEBUG_EXPR)
319 fprintf (outfile, " D#%i",
320 DEBUG_TEMP_UID (DEBUG_EXPR_TREE_DECL (in_rtx)));
322 else if (i == 0 && GET_CODE (in_rtx) == ENTRY_VALUE)
324 indent += 2;
325 if (!sawclose)
326 fprintf (outfile, " ");
327 print_rtx (ENTRY_VALUE_EXP (in_rtx));
328 indent -= 2;
330 #endif
331 break;
333 case 'e':
334 do_e:
335 indent += 2;
336 if (i == 6 && INSN_P (in_rtx))
337 /* Put REG_NOTES on their own line. */
338 fprintf (outfile, "\n%s%*s",
339 print_rtx_head, indent * 2, "");
340 if (!sawclose)
341 fprintf (outfile, " ");
342 if (i == 7 && CALL_P (in_rtx))
344 in_call_function_usage = true;
345 print_rtx (XEXP (in_rtx, i));
346 in_call_function_usage = false;
348 else
349 print_rtx (XEXP (in_rtx, i));
350 indent -= 2;
351 break;
353 case 'E':
354 case 'V':
355 indent += 2;
356 if (sawclose)
358 fprintf (outfile, "\n%s%*s",
359 print_rtx_head, indent * 2, "");
360 sawclose = 0;
362 fputs (" [", outfile);
363 if (NULL != XVEC (in_rtx, i))
365 indent += 2;
366 if (XVECLEN (in_rtx, i))
367 sawclose = 1;
369 for (j = 0; j < XVECLEN (in_rtx, i); j++)
370 print_rtx (XVECEXP (in_rtx, i, j));
372 indent -= 2;
374 if (sawclose)
375 fprintf (outfile, "\n%s%*s", print_rtx_head, indent * 2, "");
377 fputs ("]", outfile);
378 sawclose = 1;
379 indent -= 2;
380 break;
382 case 'w':
383 if (! flag_simple)
384 fprintf (outfile, " ");
385 fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, XWINT (in_rtx, i));
386 if (! flag_simple)
387 fprintf (outfile, " [" HOST_WIDE_INT_PRINT_HEX "]",
388 (unsigned HOST_WIDE_INT) XWINT (in_rtx, i));
389 break;
391 case 'i':
392 if (i == 4 && INSN_P (in_rtx))
394 #ifndef GENERATOR_FILE
395 /* Pretty-print insn locations. Ignore scoping as it is mostly
396 redundant with line number information and do not print anything
397 when there is no location information available. */
398 if (INSN_HAS_LOCATION (in_rtx))
400 expanded_location xloc = insn_location (in_rtx);
401 fprintf (outfile, " %s:%i", xloc.file, xloc.line);
403 #endif
405 else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
407 #ifndef GENERATOR_FILE
408 if (ASM_OPERANDS_SOURCE_LOCATION (in_rtx) != UNKNOWN_LOCATION)
409 fprintf (outfile, " %s:%i",
410 LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
411 LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
412 #endif
414 else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
416 #ifndef GENERATOR_FILE
417 if (ASM_INPUT_SOURCE_LOCATION (in_rtx) != UNKNOWN_LOCATION)
418 fprintf (outfile, " %s:%i",
419 LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
420 LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
421 #endif
423 else if (i == 5 && NOTE_P (in_rtx))
425 /* This field is only used for NOTE_INSN_DELETED_LABEL, and
426 other times often contains garbage from INSN->NOTE death. */
427 if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
428 || NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
429 fprintf (outfile, " %d", XINT (in_rtx, i));
431 #if !defined(GENERATOR_FILE) && NUM_UNSPECV_VALUES > 0
432 else if (i == 1
433 && GET_CODE (in_rtx) == UNSPEC_VOLATILE
434 && XINT (in_rtx, 1) >= 0
435 && XINT (in_rtx, 1) < NUM_UNSPECV_VALUES)
436 fprintf (outfile, " %s", unspecv_strings[XINT (in_rtx, 1)]);
437 #endif
438 #if !defined(GENERATOR_FILE) && NUM_UNSPEC_VALUES > 0
439 else if (i == 1
440 && (GET_CODE (in_rtx) == UNSPEC
441 || GET_CODE (in_rtx) == UNSPEC_VOLATILE)
442 && XINT (in_rtx, 1) >= 0
443 && XINT (in_rtx, 1) < NUM_UNSPEC_VALUES)
444 fprintf (outfile, " %s", unspec_strings[XINT (in_rtx, 1)]);
445 #endif
446 else
448 int value = XINT (in_rtx, i);
449 const char *name;
451 #ifndef GENERATOR_FILE
452 if (REG_P (in_rtx) && (unsigned) value < FIRST_PSEUDO_REGISTER)
453 fprintf (outfile, " %d %s", value, reg_names[value]);
454 else if (REG_P (in_rtx)
455 && (unsigned) value <= LAST_VIRTUAL_REGISTER)
457 if (value == VIRTUAL_INCOMING_ARGS_REGNUM)
458 fprintf (outfile, " %d virtual-incoming-args", value);
459 else if (value == VIRTUAL_STACK_VARS_REGNUM)
460 fprintf (outfile, " %d virtual-stack-vars", value);
461 else if (value == VIRTUAL_STACK_DYNAMIC_REGNUM)
462 fprintf (outfile, " %d virtual-stack-dynamic", value);
463 else if (value == VIRTUAL_OUTGOING_ARGS_REGNUM)
464 fprintf (outfile, " %d virtual-outgoing-args", value);
465 else if (value == VIRTUAL_CFA_REGNUM)
466 fprintf (outfile, " %d virtual-cfa", value);
467 else if (value == VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM)
468 fprintf (outfile, " %d virtual-preferred-stack-boundary",
469 value);
470 else
471 fprintf (outfile, " %d virtual-reg-%d", value,
472 value-FIRST_VIRTUAL_REGISTER);
474 else
475 #endif
476 if (flag_dump_unnumbered
477 && (is_insn || NOTE_P (in_rtx)))
478 fputc ('#', outfile);
479 else
480 fprintf (outfile, " %d", value);
482 #ifndef GENERATOR_FILE
483 if (REG_P (in_rtx) && REG_ATTRS (in_rtx))
485 fputs (" [", outfile);
486 if (ORIGINAL_REGNO (in_rtx) != REGNO (in_rtx))
487 fprintf (outfile, "orig:%i", ORIGINAL_REGNO (in_rtx));
488 if (REG_EXPR (in_rtx))
489 print_mem_expr (outfile, REG_EXPR (in_rtx));
491 if (REG_OFFSET (in_rtx))
492 fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC,
493 REG_OFFSET (in_rtx));
494 fputs (" ]", outfile);
496 if (REG_P (in_rtx) && REGNO (in_rtx) != ORIGINAL_REGNO (in_rtx))
497 fprintf (outfile, " [%d]", ORIGINAL_REGNO (in_rtx));
498 #endif
500 if (is_insn && &INSN_CODE (in_rtx) == &XINT (in_rtx, i)
501 && XINT (in_rtx, i) >= 0
502 && (name = get_insn_name (XINT (in_rtx, i))) != NULL)
503 fprintf (outfile, " {%s}", name);
504 sawclose = 0;
506 break;
508 /* Print NOTE_INSN names rather than integer codes. */
510 case 'n':
511 fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
512 sawclose = 0;
513 break;
515 case 'u':
516 if (XEXP (in_rtx, i) != NULL)
518 rtx sub = XEXP (in_rtx, i);
519 enum rtx_code subc = GET_CODE (sub);
521 if (GET_CODE (in_rtx) == LABEL_REF)
523 if (subc == NOTE
524 && NOTE_KIND (sub) == NOTE_INSN_DELETED_LABEL)
526 if (flag_dump_unnumbered)
527 fprintf (outfile, " [# deleted]");
528 else
529 fprintf (outfile, " [%d deleted]", INSN_UID (sub));
530 sawclose = 0;
531 break;
534 if (subc != CODE_LABEL)
535 goto do_e;
538 if (flag_dump_unnumbered
539 || (flag_dump_unnumbered_links && (i == 1 || i == 2)
540 && (INSN_P (in_rtx) || NOTE_P (in_rtx)
541 || LABEL_P (in_rtx) || BARRIER_P (in_rtx))))
542 fputs (" #", outfile);
543 else
544 fprintf (outfile, " %d", INSN_UID (sub));
546 else
547 fputs (" 0", outfile);
548 sawclose = 0;
549 break;
551 case 't':
552 #ifndef GENERATOR_FILE
553 if (i == 0 && GET_CODE (in_rtx) == DEBUG_IMPLICIT_PTR)
554 print_mem_expr (outfile, DEBUG_IMPLICIT_PTR_DECL (in_rtx));
555 else if (i == 0 && GET_CODE (in_rtx) == DEBUG_PARAMETER_REF)
556 print_mem_expr (outfile, DEBUG_PARAMETER_REF_DECL (in_rtx));
557 else
558 dump_addr (outfile, " ", XTREE (in_rtx, i));
559 #endif
560 break;
562 case '*':
563 fputs (" Unknown", outfile);
564 sawclose = 0;
565 break;
567 case 'B':
568 #ifndef GENERATOR_FILE
569 if (XBBDEF (in_rtx, i))
570 fprintf (outfile, " %i", XBBDEF (in_rtx, i)->index);
571 #endif
572 break;
574 default:
575 gcc_unreachable ();
578 switch (GET_CODE (in_rtx))
580 #ifndef GENERATOR_FILE
581 case MEM:
582 if (__builtin_expect (final_insns_dump_p, false))
583 fprintf (outfile, " [");
584 else
585 fprintf (outfile, " [" HOST_WIDE_INT_PRINT_DEC,
586 (HOST_WIDE_INT) MEM_ALIAS_SET (in_rtx));
588 if (MEM_EXPR (in_rtx))
589 print_mem_expr (outfile, MEM_EXPR (in_rtx));
590 else
591 fputc (' ', outfile);
593 if (MEM_OFFSET_KNOWN_P (in_rtx))
594 fprintf (outfile, "+" HOST_WIDE_INT_PRINT_DEC, MEM_OFFSET (in_rtx));
596 if (MEM_SIZE_KNOWN_P (in_rtx))
597 fprintf (outfile, " S" HOST_WIDE_INT_PRINT_DEC, MEM_SIZE (in_rtx));
599 if (MEM_ALIGN (in_rtx) != 1)
600 fprintf (outfile, " A%u", MEM_ALIGN (in_rtx));
602 if (!ADDR_SPACE_GENERIC_P (MEM_ADDR_SPACE (in_rtx)))
603 fprintf (outfile, " AS%u", MEM_ADDR_SPACE (in_rtx));
605 fputc (']', outfile);
606 break;
608 case CONST_DOUBLE:
609 if (FLOAT_MODE_P (GET_MODE (in_rtx)))
611 char s[60];
613 real_to_decimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
614 sizeof (s), 0, 1);
615 fprintf (outfile, " %s", s);
617 real_to_hexadecimal (s, CONST_DOUBLE_REAL_VALUE (in_rtx),
618 sizeof (s), 0, 1);
619 fprintf (outfile, " [%s]", s);
621 break;
623 case CONST_WIDE_INT:
624 fprintf (outfile, " ");
625 cwi_output_hex (outfile, in_rtx);
626 break;
627 #endif
629 case CODE_LABEL:
630 fprintf (outfile, " [%d uses]", LABEL_NUSES (in_rtx));
631 switch (LABEL_KIND (in_rtx))
633 case LABEL_NORMAL: break;
634 case LABEL_STATIC_ENTRY: fputs (" [entry]", outfile); break;
635 case LABEL_GLOBAL_ENTRY: fputs (" [global entry]", outfile); break;
636 case LABEL_WEAK_ENTRY: fputs (" [weak entry]", outfile); break;
637 default: gcc_unreachable ();
639 break;
641 default:
642 break;
645 fputc (')', outfile);
646 sawclose = 1;
649 /* Print an rtx on the current line of FILE. Initially indent IND
650 characters. */
652 void
653 print_inline_rtx (FILE *outf, const_rtx x, int ind)
655 int oldsaw = sawclose;
656 int oldindent = indent;
658 sawclose = 0;
659 indent = ind;
660 outfile = outf;
661 print_rtx (x);
662 sawclose = oldsaw;
663 indent = oldindent;
666 /* Call this function from the debugger to see what X looks like. */
668 DEBUG_FUNCTION void
669 debug_rtx (const_rtx x)
671 outfile = stderr;
672 sawclose = 0;
673 print_rtx (x);
674 fprintf (stderr, "\n");
677 /* Dump rtx REF. */
679 DEBUG_FUNCTION void
680 debug (const rtx_def &ref)
682 debug_rtx (&ref);
685 DEBUG_FUNCTION void
686 debug (const rtx_def *ptr)
688 if (ptr)
689 debug (*ptr);
690 else
691 fprintf (stderr, "<nil>\n");
694 /* Count of rtx's to print with debug_rtx_list.
695 This global exists because gdb user defined commands have no arguments. */
697 DEBUG_VARIABLE int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
699 /* Call this function to print list from X on.
701 N is a count of the rtx's to print. Positive values print from the specified
702 rtx on. Negative values print a window around the rtx.
703 EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */
705 DEBUG_FUNCTION void
706 debug_rtx_list (const_rtx x, int n)
708 int i,count;
709 const_rtx insn;
711 count = n == 0 ? 1 : n < 0 ? -n : n;
713 /* If we are printing a window, back up to the start. */
715 if (n < 0)
716 for (i = count / 2; i > 0; i--)
718 if (PREV_INSN (x) == 0)
719 break;
720 x = PREV_INSN (x);
723 for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
725 debug_rtx (insn);
726 fprintf (stderr, "\n");
730 /* Call this function to print an rtx list from START to END inclusive. */
732 DEBUG_FUNCTION void
733 debug_rtx_range (const_rtx start, const_rtx end)
735 while (1)
737 debug_rtx (start);
738 fprintf (stderr, "\n");
739 if (!start || start == end)
740 break;
741 start = NEXT_INSN (start);
745 /* Call this function to search an rtx list to find one with insn uid UID,
746 and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
747 The found insn is returned to enable further debugging analysis. */
749 DEBUG_FUNCTION const_rtx
750 debug_rtx_find (const_rtx x, int uid)
752 while (x != 0 && INSN_UID (x) != uid)
753 x = NEXT_INSN (x);
754 if (x != 0)
756 debug_rtx_list (x, debug_rtx_count);
757 return x;
759 else
761 fprintf (stderr, "insn uid %d not found\n", uid);
762 return 0;
766 /* External entry point for printing a chain of insns
767 starting with RTX_FIRST onto file OUTF.
768 A blank line separates insns.
770 If RTX_FIRST is not an insn, then it alone is printed, with no newline. */
772 void
773 print_rtl (FILE *outf, const_rtx rtx_first)
775 const_rtx tmp_rtx;
777 outfile = outf;
778 sawclose = 0;
780 if (rtx_first == 0)
782 fputs (print_rtx_head, outf);
783 fputs ("(nil)\n", outf);
785 else
786 switch (GET_CODE (rtx_first))
788 case INSN:
789 case JUMP_INSN:
790 case CALL_INSN:
791 case NOTE:
792 case CODE_LABEL:
793 case JUMP_TABLE_DATA:
794 case BARRIER:
795 for (tmp_rtx = rtx_first; tmp_rtx != 0; tmp_rtx = NEXT_INSN (tmp_rtx))
797 fputs (print_rtx_head, outfile);
798 print_rtx (tmp_rtx);
799 fprintf (outfile, "\n");
801 break;
803 default:
804 fputs (print_rtx_head, outfile);
805 print_rtx (rtx_first);
809 /* Like print_rtx, except specify a file. */
810 /* Return nonzero if we actually printed anything. */
813 print_rtl_single (FILE *outf, const_rtx x)
815 return print_rtl_single_with_indent (outf, x, 0);
818 /* Like print_rtl_single, except specify a file and indentation. */
821 print_rtl_single_with_indent (FILE *outf, const_rtx x, int ind)
823 int old_indent = indent;
824 char *s_indent = (char *) alloca ((size_t) ind + 1);
825 memset ((void *) s_indent, ' ', (size_t) ind);
826 s_indent[ind] = '\0';
828 indent = ind;
829 outfile = outf;
830 sawclose = 0;
831 fputs (s_indent, outfile);
832 fputs (print_rtx_head, outfile);
833 print_rtx (x);
834 putc ('\n', outf);
835 indent = old_indent;
836 return 1;
840 /* Like print_rtl except without all the detail; for example,
841 if RTX is a CONST_INT then print in decimal format. */
843 void
844 print_simple_rtl (FILE *outf, const_rtx x)
846 flag_simple = 1;
847 print_rtl (outf, x);
848 flag_simple = 0;