summaryrefslogtreecommitdiff
path: root/gcc/tree-dump.c
blob: 87a283146e481041f9d50a85527bdf87f2f5b25f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
/* Tree-dumping functionality for intermediate representation.
   Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005
   Free Software Foundation, Inc.
   Written by Mark Mitchell <mark@codesourcery.com>

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 "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "splay-tree.h"
#include "diagnostic.h"
#include "toplev.h"
#include "tree-dump.h"
#include "tree-pass.h"
#include "langhooks.h"
#include "tree-iterator.h"

static unsigned int queue (dump_info_p, tree, int);
static void dump_index (dump_info_p, unsigned int);
static void dequeue_and_dump (dump_info_p);
static void dump_new_line (dump_info_p);
static void dump_maybe_newline (dump_info_p);
static void dump_string_field (dump_info_p, const char *, const char *);
static int dump_enable_all (int, int);

/* Add T to the end of the queue of nodes to dump.  Returns the index
   assigned to T.  */

static unsigned int
queue (dump_info_p di, tree t, int flags)
{
  dump_queue_p dq;
  dump_node_info_p dni;
  unsigned int index;

  /* Assign the next available index to T.  */
  index = ++di->index;

  /* Obtain a new queue node.  */
  if (di->free_list)
    {
      dq = di->free_list;
      di->free_list = dq->next;
    }
  else
    dq = xmalloc (sizeof (struct dump_queue));

  /* Create a new entry in the splay-tree.  */
  dni = xmalloc (sizeof (struct dump_node_info));
  dni->index = index;
  dni->binfo_p = ((flags & DUMP_BINFO) != 0);
  dq->node = splay_tree_insert (di->nodes, (splay_tree_key) t,
				(splay_tree_value) dni);

  /* Add it to the end of the queue.  */
  dq->next = 0;
  if (!di->queue_end)
    di->queue = dq;
  else
    di->queue_end->next = dq;
  di->queue_end = dq;

  /* Return the index.  */
  return index;
}

static void
dump_index (dump_info_p di, unsigned int index)
{
  fprintf (di->stream, "@%-6u ", index);
  di->column += 8;
}

/* If T has not already been output, queue it for subsequent output.
   FIELD is a string to print before printing the index.  Then, the
   index of T is printed.  */

void
queue_and_dump_index (dump_info_p di, const char *field, tree t, int flags)
{
  unsigned int index;
  splay_tree_node n;

  /* If there's no node, just return.  This makes for fewer checks in
     our callers.  */
  if (!t)
    return;

  /* See if we've already queued or dumped this node.  */
  n = splay_tree_lookup (di->nodes, (splay_tree_key) t);
  if (n)
    index = ((dump_node_info_p) n->value)->index;
  else
    /* If we haven't, add it to the queue.  */
    index = queue (di, t, flags);

  /* Print the index of the node.  */
  dump_maybe_newline (di);
  fprintf (di->stream, "%-4s: ", field);
  di->column += 6;
  dump_index (di, index);
}

/* Dump the type of T.  */

void
queue_and_dump_type (dump_info_p di, tree t)
{
  queue_and_dump_index (di, "type", TREE_TYPE (t), DUMP_NONE);
}

/* Dump column control */
#define SOL_COLUMN 25		/* Start of line column.  */
#define EOL_COLUMN 55		/* End of line column.  */
#define COLUMN_ALIGNMENT 15	/* Alignment.  */

/* Insert a new line in the dump output, and indent to an appropriate
   place to start printing more fields.  */

static void
dump_new_line (dump_info_p di)
{
  fprintf (di->stream, "\n%*s", SOL_COLUMN, "");
  di->column = SOL_COLUMN;
}

/* If necessary, insert a new line.  */

static void
dump_maybe_newline (dump_info_p di)
{
  int extra;

  /* See if we need a new line.  */
  if (di->column > EOL_COLUMN)
    dump_new_line (di);
  /* See if we need any padding.  */
  else if ((extra = (di->column - SOL_COLUMN) % COLUMN_ALIGNMENT) != 0)
    {
      fprintf (di->stream, "%*s", COLUMN_ALIGNMENT - extra, "");
      di->column += COLUMN_ALIGNMENT - extra;
    }
}

/* Dump pointer PTR using FIELD to identify it.  */

void
dump_pointer (dump_info_p di, const char *field, void *ptr)
{
  dump_maybe_newline (di);
  fprintf (di->stream, "%-4s: %-8lx ", field, (long) ptr);
  di->column += 15;
}

/* Dump integer I using FIELD to identify it.  */

void
dump_int (dump_info_p di, const char *field, int i)
{
  dump_maybe_newline (di);
  fprintf (di->stream, "%-4s: %-7d ", field, i);
  di->column += 14;
}

/* Dump the string S.  */

void
dump_string (dump_info_p di, const char *string)
{
  dump_maybe_newline (di);
  fprintf (di->stream, "%-13s ", string);
  if (strlen (string) > 13)
    di->column += strlen (string) + 1;
  else
    di->column += 14;
}

/* Dump the string field S.  */

static void
dump_string_field (dump_info_p di, const char *field, const char *string)
{
  dump_maybe_newline (di);
  fprintf (di->stream, "%-4s: %-7s ", field, string);
  if (strlen (string) > 7)
    di->column += 6 + strlen (string) + 1;
  else
    di->column += 14;
}

/* Dump the next node in the queue.  */

static void
dequeue_and_dump (dump_info_p di)
{
  dump_queue_p dq;
  splay_tree_node stn;
  dump_node_info_p dni;
  tree t;
  unsigned int index;
  enum tree_code code;
  enum tree_code_class code_class;
  const char* code_name;

  /* Get the next node from the queue.  */
  dq = di->queue;
  stn = dq->node;
  t = (tree) stn->key;
  dni = (dump_node_info_p) stn->value;
  index = dni->index;

  /* Remove the node from the queue, and put it on the free list.  */
  di->queue = dq->next;
  if (!di->queue)
    di->queue_end = 0;
  dq->next = di->free_list;
  di->free_list = dq;

  /* Print the node index.  */
  dump_index (di, index);
  /* And the type of node this is.  */
  if (dni->binfo_p)
    code_name = "binfo";
  else
    code_name = tree_code_name[(int) TREE_CODE (t)];
  fprintf (di->stream, "%-16s ", code_name);
  di->column = 25;

  /* Figure out what kind of node this is.  */
  code = TREE_CODE (t);
  code_class = TREE_CODE_CLASS (code);

  /* Although BINFOs are TREE_VECs, we dump them specially so as to be
     more informative.  */
  if (dni->binfo_p)
    {
      unsigned ix;
      tree base;
      VEC (tree) *accesses = BINFO_BASE_ACCESSES (t);

      dump_child ("type", BINFO_TYPE (t));

      if (BINFO_VIRTUAL_P (t))
	dump_string (di, "virt");

      dump_int (di, "bases", BINFO_N_BASE_BINFOS (t));
      for (ix = 0; BINFO_BASE_ITERATE (t, ix, base); ix++)
	{
	  tree access = (accesses ? VEC_index (tree, accesses, ix)
			 : access_public_node);
	  const char *string = NULL;

	  if (access == access_public_node)
	    string = "pub";
	  else if (access == access_protected_node)
	    string = "prot";
	  else if (access == access_private_node)
	    string = "priv";
	  else
	    gcc_unreachable ();

	  dump_string (di, string);
	  queue_and_dump_index (di, "binf", base, DUMP_BINFO);
	}

      goto done;
    }

  /* We can knock off a bunch of expression nodes in exactly the same
     way.  */
  if (IS_EXPR_CODE_CLASS (code_class))
    {
      /* If we're dumping children, dump them now.  */
      queue_and_dump_type (di, t);

      switch (code_class)
	{
	case tcc_unary:
	  dump_child ("op 0", TREE_OPERAND (t, 0));
	  break;

	case tcc_binary:
	case tcc_comparison:
	  dump_child ("op 0", TREE_OPERAND (t, 0));
	  dump_child ("op 1", TREE_OPERAND (t, 1));
	  break;

	case tcc_expression:
	case tcc_reference:
	case tcc_statement:
	  /* These nodes are handled explicitly below.  */
	  break;

	default:
	  gcc_unreachable ();
	}
    }
  else if (DECL_P (t))
    {
      expanded_location xloc;
      /* All declarations have names.  */
      if (DECL_NAME (t))
	dump_child ("name", DECL_NAME (t));
      if (DECL_ASSEMBLER_NAME_SET_P (t)
	  && DECL_ASSEMBLER_NAME (t) != DECL_NAME (t))
	dump_child ("mngl", DECL_ASSEMBLER_NAME (t));
      /* And types.  */
      queue_and_dump_type (di, t);
      dump_child ("scpe", DECL_CONTEXT (t));
      /* And a source position.  */
      xloc = expand_location (DECL_SOURCE_LOCATION (t));
      if (xloc.file)
	{
	  const char *filename = strrchr (xloc.file, '/');
	  if (!filename)
	    filename = xloc.file;
	  else
	    /* Skip the slash.  */
	    ++filename;

	  dump_maybe_newline (di);
	  fprintf (di->stream, "srcp: %s:%-6d ", filename,
		   xloc.line);
	  di->column += 6 + strlen (filename) + 8;
	}
      /* And any declaration can be compiler-generated.  */
      if (DECL_ARTIFICIAL (t))
	dump_string (di, "artificial");
      if (TREE_CHAIN (t) && !dump_flag (di, TDF_SLIM, NULL))
	dump_child ("chan", TREE_CHAIN (t));
    }
  else if (code_class == tcc_type)
    {
      /* All types have qualifiers.  */
      int quals = lang_hooks.tree_dump.type_quals (t);

      if (quals != TYPE_UNQUALIFIED)
	{
	  fprintf (di->stream, "qual: %c%c%c     ",
		   (quals & TYPE_QUAL_CONST) ? 'c' : ' ',
		   (quals & TYPE_QUAL_VOLATILE) ? 'v' : ' ',
		   (quals & TYPE_QUAL_RESTRICT) ? 'r' : ' ');
	  di->column += 14;
	}

      /* All types have associated declarations.  */
      dump_child ("name", TYPE_NAME (t));

      /* All types have a main variant.  */
      if (TYPE_MAIN_VARIANT (t) != t)
	dump_child ("unql", TYPE_MAIN_VARIANT (t));

      /* And sizes.  */
      dump_child ("size", TYPE_SIZE (t));

      /* All types have alignments.  */
      dump_int (di, "algn", TYPE_ALIGN (t));
    }
  else if (code_class == tcc_constant)
    /* All constants can have types.  */
    queue_and_dump_type (di, t);

  /* Give the language-specific code a chance to print something.  If
     it's completely taken care of things, don't bother printing
     anything more ourselves.  */
  if (lang_hooks.tree_dump.dump_tree (di, t))
    goto done;

  /* Now handle the various kinds of nodes.  */
  switch (code)
    {
      int i;

    case IDENTIFIER_NODE:
      dump_string_field (di, "strg", IDENTIFIER_POINTER (t));
      dump_int (di, "lngt", IDENTIFIER_LENGTH (t));
      break;

    case TREE_LIST:
      dump_child ("purp", TREE_PURPOSE (t));
      dump_child ("valu", TREE_VALUE (t));
      dump_child ("chan", TREE_CHAIN (t));
      break;

    case STATEMENT_LIST:
      {
	tree_stmt_iterator it;
	for (i = 0, it = tsi_start (t); !tsi_end_p (it); tsi_next (&it), i++)
	  {
	    char buffer[32];
	    sprintf (buffer, "%u", i);
	    dump_child (buffer, tsi_stmt (it));
	  }
      }
      break;

    case TREE_VEC:
      dump_int (di, "lngt", TREE_VEC_LENGTH (t));
      for (i = 0; i < TREE_VEC_LENGTH (t); ++i)
	{
	  char buffer[32];
	  sprintf (buffer, "%u", i);
	  dump_child (buffer, TREE_VEC_ELT (t, i));
	}
      break;

    case INTEGER_TYPE:
    case ENUMERAL_TYPE:
      dump_int (di, "prec", TYPE_PRECISION (t));
      if (TYPE_UNSIGNED (t))
	dump_string (di, "unsigned");
      dump_child ("min", TYPE_MIN_VALUE (t));
      dump_child ("max", TYPE_MAX_VALUE (t));

      if (code == ENUMERAL_TYPE)
	dump_child ("csts", TYPE_VALUES (t));
      break;

    case REAL_TYPE:
      dump_int (di, "prec", TYPE_PRECISION (t));
      break;

    case POINTER_TYPE:
      dump_child ("ptd", TREE_TYPE (t));
      break;

    case REFERENCE_TYPE:
      dump_child ("refd", TREE_TYPE (t));
      break;

    case METHOD_TYPE:
      dump_child ("clas", TYPE_METHOD_BASETYPE (t));
      /* Fall through.  */

    case FUNCTION_TYPE:
      dump_child ("retn", TREE_TYPE (t));
      dump_child ("prms", TYPE_ARG_TYPES (t));
      break;

    case ARRAY_TYPE:
      dump_child ("elts", TREE_TYPE (t));
      dump_child ("domn", TYPE_DOMAIN (t));
      break;

    case RECORD_TYPE:
    case UNION_TYPE:
      if (TREE_CODE (t) == RECORD_TYPE)
	dump_string (di, "struct");
      else
	dump_string (di, "union");

      dump_child ("flds", TYPE_FIELDS (t));
      dump_child ("fncs", TYPE_METHODS (t));
      queue_and_dump_index (di, "binf", TYPE_BINFO (t),
			    DUMP_BINFO);
      break;

    case CONST_DECL:
      dump_child ("cnst", DECL_INITIAL (t));
      break;

    case VAR_DECL:
    case PARM_DECL:
    case FIELD_DECL:
    case RESULT_DECL:
      if (TREE_CODE (t) == PARM_DECL)
	dump_child ("argt", DECL_ARG_TYPE (t));
      else
	dump_child ("init", DECL_INITIAL (t));
      dump_child ("size", DECL_SIZE (t));
      dump_int (di, "algn", DECL_ALIGN (t));

      if (TREE_CODE (t) == FIELD_DECL)
	{
	  if (DECL_FIELD_OFFSET (t))
	    dump_child ("bpos", bit_position (t));
	}
      else if (TREE_CODE (t) == VAR_DECL
	       || TREE_CODE (t) == PARM_DECL)
	{
	  dump_int (di, "used", TREE_USED (t));
	  if (DECL_REGISTER (t))
	    dump_string (di, "register");
	}
      break;

    case FUNCTION_DECL:
      dump_child ("args", DECL_ARGUMENTS (t));
      if (DECL_EXTERNAL (t))
	dump_string (di, "undefined");
      if (TREE_PUBLIC (t))
	dump_string (di, "extern");
      else
	dump_string (di, "static");
      if (DECL_LANG_SPECIFIC (t) && !dump_flag (di, TDF_SLIM, t))
	dump_child ("body", DECL_SAVED_TREE (t));
      break;

    case INTEGER_CST:
      if (TREE_INT_CST_HIGH (t))
	dump_int (di, "high", TREE_INT_CST_HIGH (t));
      dump_int (di, "low", TREE_INT_CST_LOW (t));
      break;

    case STRING_CST:
      fprintf (di->stream, "strg: %-7s ", TREE_STRING_POINTER (t));
      dump_int (di, "lngt", TREE_STRING_LENGTH (t));
      break;

    case TRUTH_NOT_EXPR:
    case ADDR_EXPR:
    case INDIRECT_REF:
    case ALIGN_INDIRECT_REF:
    case MISALIGNED_INDIRECT_REF:
    case CLEANUP_POINT_EXPR:
    case SAVE_EXPR:
    case REALPART_EXPR:
    case IMAGPART_EXPR:
      /* These nodes are unary, but do not have code class `1'.  */
      dump_child ("op 0", TREE_OPERAND (t, 0));
      break;

    case TRUTH_ANDIF_EXPR:
    case TRUTH_ORIF_EXPR:
    case INIT_EXPR:
    case MODIFY_EXPR:
    case COMPOUND_EXPR:
    case PREDECREMENT_EXPR:
    case PREINCREMENT_EXPR:
    case POSTDECREMENT_EXPR:
    case POSTINCREMENT_EXPR:
      /* These nodes are binary, but do not have code class `2'.  */
      dump_child ("op 0", TREE_OPERAND (t, 0));
      dump_child ("op 1", TREE_OPERAND (t, 1));
      break;

    case COMPONENT_REF:
      dump_child ("op 0", TREE_OPERAND (t, 0));
      dump_child ("op 1", TREE_OPERAND (t, 1));
      dump_child ("op 2", TREE_OPERAND (t, 2));
      break;

    case ARRAY_REF:
    case ARRAY_RANGE_REF:
      dump_child ("op 0", TREE_OPERAND (t, 0));
      dump_child ("op 1", TREE_OPERAND (t, 1));
      dump_child ("op 2", TREE_OPERAND (t, 2));
      dump_child ("op 3", TREE_OPERAND (t, 3));
      break;

    case COND_EXPR:
      dump_child ("op 0", TREE_OPERAND (t, 0));
      dump_child ("op 1", TREE_OPERAND (t, 1));
      dump_child ("op 2", TREE_OPERAND (t, 2));
      break;

    case CALL_EXPR:
      dump_child ("fn", TREE_OPERAND (t, 0));
      dump_child ("args", TREE_OPERAND (t, 1));
      break;

    case CONSTRUCTOR:
      dump_child ("elts", CONSTRUCTOR_ELTS (t));
      break;

    case BIND_EXPR:
      dump_child ("vars", TREE_OPERAND (t, 0));
      dump_child ("body", TREE_OPERAND (t, 1));
      break;

    case LOOP_EXPR:
      dump_child ("body", TREE_OPERAND (t, 0));
      break;

    case EXIT_EXPR:
      dump_child ("cond", TREE_OPERAND (t, 0));
      break;

    case TARGET_EXPR:
      dump_child ("decl", TREE_OPERAND (t, 0));
      dump_child ("init", TREE_OPERAND (t, 1));
      dump_child ("clnp", TREE_OPERAND (t, 2));
      /* There really are two possible places the initializer can be.
	 After RTL expansion, the second operand is moved to the
	 position of the fourth operand, and the second operand
	 becomes NULL.  */
      dump_child ("init", TREE_OPERAND (t, 3));
      break;

    default:
      /* There are no additional fields to print.  */
      break;
    }

 done:
  if (dump_flag (di, TDF_ADDRESS, NULL))
    dump_pointer (di, "addr", (void *)t);

  /* Terminate the line.  */
  fprintf (di->stream, "\n");
}

/* Return nonzero if FLAG has been specified for the dump, and NODE
   is not the root node of the dump.  */

int dump_flag (dump_info_p di, int flag, tree node)
{
  return (di->flags & flag) && (node != di->node);
}

/* Dump T, and all its children, on STREAM.  */

void
dump_node (tree t, int flags, FILE *stream)
{
  struct dump_info di;
  dump_queue_p dq;
  dump_queue_p next_dq;

  /* Initialize the dump-information structure.  */
  di.stream = stream;
  di.index = 0;
  di.column = 0;
  di.queue = 0;
  di.queue_end = 0;
  di.free_list = 0;
  di.flags = flags;
  di.node = t;
  di.nodes = splay_tree_new (splay_tree_compare_pointers, 0,
			     (splay_tree_delete_value_fn) &free);

  /* Queue up the first node.  */
  queue (&di, t, DUMP_NONE);

  /* Until the queue is empty, keep dumping nodes.  */
  while (di.queue)
    dequeue_and_dump (&di);

  /* Now, clean up.  */
  for (dq = di.free_list; dq; dq = next_dq)
    {
      next_dq = dq->next;
      free (dq);
    }
  splay_tree_delete (di.nodes);
}


/* Table of tree dump switches. This must be consistent with the
   TREE_DUMP_INDEX enumeration in tree.h */
static struct dump_file_info dump_files[TDI_end] =
{
  {NULL, NULL, NULL, 0, 0, 0, 0},
  {".tu", "translation-unit", NULL, TDF_TREE, 0, 0, 0},
  {".class", "class-hierarchy", NULL, TDF_TREE, 0, 1, 0},
  {".original", "tree-original", NULL, TDF_TREE, 0, 2, 0},
  {".generic", "tree-generic", NULL, TDF_TREE, 0, 3, 0},
  {".nested", "tree-nested", NULL, TDF_TREE, 0, 4, 0},
  {".inlined", "tree-inlined", NULL, TDF_TREE, 0, 5, 0},
  {".vcg", "tree-vcg", NULL, TDF_TREE, 0, 6, 0},
  {NULL, "tree-all", NULL, TDF_TREE, 0, 0, 0},
  {NULL, "rtl-all", NULL, TDF_RTL, 0, 0, 0},
  {NULL, "ipa-all", NULL, TDF_IPA, 0, 0, 0},

  { ".cgraph", "ipa-cgraph", NULL,	TDF_IPA, 0,  1, 0},

  { ".sibling", "rtl-sibling", NULL,	TDF_RTL, 0,  1, 'i'},
  { ".eh", "rtl-eh", NULL,		TDF_RTL, 0,  2, 'h'},
  { ".jump", "rtl-jump", NULL,		TDF_RTL, 0,  3, 'j'},
  { ".cse", "rtl-cse", NULL,    	 TDF_RTL, 0,  4, 's'},
  { ".gcse", "rtl-gcse", NULL,		TDF_RTL, 0,  5, 'G'},
  { ".loop", "rtl-loop", NULL,		TDF_RTL, 0,  6, 'L'},
  { ".bypass", "rtl-bypass", NULL,		TDF_RTL, 0,  7, 'G'},
  { ".cfg", "rtl-cfg", NULL,			TDF_RTL, 0,  8, 'f'},
  { ".bp", "rtl-bp", NULL,			TDF_RTL, 0,  9, 'b'},
  { ".vpt", "rtl-vpt", NULL,			TDF_RTL, 0, 10, 'V'},
  { ".ce1", "rtl-ce1", NULL,			TDF_RTL, 0, 11, 'C'},
  { ".tracer", "rtl-tracer", NULL,		TDF_RTL, 0, 12, 'T'},
  { ".loop2", "rtl-loop2", NULL,		TDF_RTL, 0, 13, 'L'},
  { ".web", "rtl-web", NULL,			TDF_RTL, 0, 14, 'Z'},
  { ".cse2", "rtl-cse2", NULL,		TDF_RTL, 0, 15, 't'},
  { ".life", "rtl-life", NULL,		TDF_RTL, 0, 16, 'f'},
  { ".combine", "rtl-combine", NULL,		TDF_RTL, 0, 17, 'c'},
  { ".ce2", "rtl-ce2", NULL,			TDF_RTL, 0, 18, 'C'},
  { ".regmove", "rtl-regmove", NULL,		TDF_RTL, 0, 19, 'N'},
  { ".sms", "rtl-sms", NULL,			TDF_RTL, 0, 20, 'm'},
  { ".sched", "rtl-sched", NULL,		TDF_RTL, 0, 21, 'S'},
  { ".lreg", "rtl-lreg", NULL,		TDF_RTL, 0, 22, 'l'},
  { ".greg", "rtl-greg", NULL,		TDF_RTL, 0, 23, 'g'},
  { ".postreload", "rtl-postreload", NULL,	TDF_RTL, 0, 24, 'o'},
  { ".gcse2", "rtl-gcse2", NULL,		TDF_RTL, 0, 25, 'J'},
  { ".flow2", "rtl-flow2", NULL,		TDF_RTL, 0, 26, 'w'},
  { ".peephole2", "rtl-peephole2", NULL,	TDF_RTL, 0, 27, 'z'},
  { ".ce3", "rtl-ce3", NULL,			TDF_RTL, 0, 28, 'E'},
  { ".rnreg", "rtl-rnreg", NULL,		TDF_RTL, 0, 29, 'n'},
  { ".bbro", "rtl-bbro", NULL,		TDF_RTL, 0, 30, 'B'},
  { ".btl", "rtl-btl", NULL,			TDF_RTL, 0, 31, 'd'},
  { ".sched2", "rtl-sched2", NULL,		TDF_RTL, 0, 32, 'R'},
  { ".stack", "rtl-stack", NULL,		TDF_RTL, 0, 33, 'k'},
  { ".vartrack", "rtl-vartrack", NULL,	TDF_RTL, 0, 34, 'V'},
  { ".mach", "rtl-mach", NULL,		TDF_RTL, 0, 35, 'M'},
  { ".dbr", "rtl-dbr", NULL,			TDF_RTL, 0, 36, 'd'}
};

/* Dynamically registered tree dump files and switches.  */
static struct dump_file_info *extra_dump_files;
static size_t extra_dump_files_in_use;
static size_t extra_dump_files_alloced;

/* Define a name->number mapping for a dump flag value.  */
struct dump_option_value_info
{
  const char *const name;	/* the name of the value */
  const int value;		/* the value of the name */
};

/* Table of dump options. This must be consistent with the TDF_* flags
   in tree.h */
static const struct dump_option_value_info dump_options[] =
{
  {"address", TDF_ADDRESS},
  {"slim", TDF_SLIM},
  {"raw", TDF_RAW},
  {"details", TDF_DETAILS},
  {"stats", TDF_STATS},
  {"blocks", TDF_BLOCKS},
  {"vops", TDF_VOPS},
  {"lineno", TDF_LINENO},
  {"uid", TDF_UID},
  {"all", ~(TDF_RAW | TDF_SLIM | TDF_LINENO | TDF_TREE | TDF_RTL | TDF_IPA)},
  {NULL, 0}
};

unsigned int
dump_register (const char *suffix, const char *swtch, const char *glob,
	       int flags, unsigned int num, int letter)
{
  size_t this = extra_dump_files_in_use++;

  if (this >= extra_dump_files_alloced)
    {
      if (extra_dump_files_alloced == 0)
	extra_dump_files_alloced = 32;
      else
	extra_dump_files_alloced *= 2;
      extra_dump_files = xrealloc (extra_dump_files,
				   sizeof (struct dump_file_info)
				   * extra_dump_files_alloced);
    }

  memset (&extra_dump_files[this], 0, sizeof (struct dump_file_info));
  extra_dump_files[this].suffix = suffix;
  extra_dump_files[this].swtch = swtch;
  extra_dump_files[this].glob = glob;
  extra_dump_files[this].flags = flags;
  extra_dump_files[this].num = num;
  extra_dump_files[this].letter = letter;

  return this + TDI_end;
}


/* Return the dump_file_info for the given phase.  */

struct dump_file_info *
get_dump_file_info (enum tree_dump_index phase)
{
  if (phase < TDI_end)
    return &dump_files[phase];
  else if (phase - TDI_end >= extra_dump_files_in_use)
    return NULL;
  else
    return extra_dump_files + (phase - TDI_end);
}


/* Return the name of the dump file for the given phase.
   If the dump is not enabled, returns NULL.  */

char *
get_dump_file_name (enum tree_dump_index phase)
{
  char dump_id[7];
  struct dump_file_info *dfi;

  if (phase == TDI_none)
    return NULL;

  dfi = get_dump_file_info (phase);
  if (dfi->state == 0)
    return NULL;

  if (dfi->num < 0)
    dump_id[0] = '\0';
  else
    {
      const char *template;
      if (dfi->flags & TDF_TREE)
	template = ".t%02d";
      else if (dfi->flags & TDF_IPA)
	template = ".i%02d";
      else
	template = ".%02d";

      if (snprintf (dump_id, sizeof (dump_id), template, dfi->num) < 0)
	dump_id[0] = '\0';
    }

  return concat (dump_base_name, dump_id, dfi->suffix, NULL);
}

/* Begin a tree dump for PHASE. Stores any user supplied flag in
   *FLAG_PTR and returns a stream to write to. If the dump is not
   enabled, returns NULL.
   Multiple calls will reopen and append to the dump file.  */

FILE *
dump_begin (enum tree_dump_index phase, int *flag_ptr)
{
  char *name;
  struct dump_file_info *dfi;
  FILE *stream;

  if (phase == TDI_none || !dump_enabled_p (phase))
    return NULL;

  name = get_dump_file_name (phase);
  dfi = get_dump_file_info (phase);
  stream = fopen (name, dfi->state < 0 ? "w" : "a");
  if (!stream)
    error ("could not open dump file %qs: %s", name, strerror (errno));
  else
    dfi->state = 1;
  free (name);

  if (flag_ptr)
    *flag_ptr = dfi->flags;

  return stream;
}

/* Returns nonzero if tree dump PHASE is enabled.  */

int
dump_enabled_p (enum tree_dump_index phase)
{
  struct dump_file_info *dfi = get_dump_file_info (phase);
  return dfi->state;
}

/* Returns nonzero if tree dump PHASE has been initialized.  */

int
dump_initialized_p (enum tree_dump_index phase)
{
  struct dump_file_info *dfi = get_dump_file_info (phase);
  return dfi->state > 0;
}

/* Returns the switch name of PHASE.  */

const char *
dump_flag_name (enum tree_dump_index phase)
{
  struct dump_file_info *dfi = get_dump_file_info (phase);
  return dfi->swtch;
}

/* Finish a tree dump for PHASE. STREAM is the stream created by
   dump_begin.  */

void
dump_end (enum tree_dump_index phase ATTRIBUTE_UNUSED, FILE *stream)
{
  fclose (stream);
}

/* Enable all tree dumps.  Return number of enabled tree dumps.  */

static int
dump_enable_all (int flags, int letter)
{
  int n = 0;
  size_t i;

  for (i = TDI_none + 1; i < (size_t) TDI_end; i++)
    if ((dump_files[i].flags & flags)
	&& (letter == 0 || letter == dump_files[i].letter))
      {
        dump_files[i].state = -1;
        dump_files[i].flags = flags;
        n++;
      }

  for (i = 0; i < extra_dump_files_in_use; i++)
    if ((extra_dump_files[i].flags & flags)
	&& (letter == 0 || letter == extra_dump_files[i].letter))
      {
        extra_dump_files[i].state = -1;
        extra_dump_files[i].flags = flags;
	n++;
      }

  return n;
}

/* Parse ARG as a dump switch. Return nonzero if it is, and store the
   relevant details in the dump_files array.  */

static int
dump_switch_p_1 (const char *arg, struct dump_file_info *dfi, bool doglob)
{
  const char *option_value;
  const char *ptr;
  int flags;
  
  if (doglob && !dfi->glob)
    return 0;

  option_value = skip_leading_substring (arg, doglob ? dfi->glob : dfi->swtch);
  if (!option_value)
    return 0;

  ptr = option_value;
  flags = 0;

  while (*ptr)
    {
      const struct dump_option_value_info *option_ptr;
      const char *end_ptr;
      unsigned length;

      while (*ptr == '-')
	ptr++;
      end_ptr = strchr (ptr, '-');
      if (!end_ptr)
	end_ptr = ptr + strlen (ptr);
      length = end_ptr - ptr;

      for (option_ptr = dump_options; option_ptr->name; option_ptr++)
	if (strlen (option_ptr->name) == length
	    && !memcmp (option_ptr->name, ptr, length))
	  {
	    flags |= option_ptr->value;
	    goto found;
	  }
      warning ("ignoring unknown option %q.*s in %<-fdump-%s%>",
	       length, ptr, dfi->swtch);
    found:;
      ptr = end_ptr;
    }

  dfi->state = -1;
  dfi->flags |= flags;

  /* Process -fdump-tree-all and -fdump-rtl-all, by enabling all the
     known dumps.  */
  if (dfi->suffix == NULL)
    dump_enable_all (dfi->flags, 0);

  return 1;
}

int
dump_switch_p (const char *arg)
{
  size_t i;
  int any = 0;

  for (i = TDI_none + 1; i != TDI_end; i++)
    any |= dump_switch_p_1 (arg, &dump_files[i], false);

  /* Don't glob if we got a hit already */
  if (!any)
    for (i = TDI_none + 1; i != TDI_end; i++)
      any |= dump_switch_p_1 (arg, &dump_files[i], true);

  for (i = 0; i < extra_dump_files_in_use; i++)
    any |= dump_switch_p_1 (arg, &extra_dump_files[i], false);
  
  if (!any)
    for (i = 0; i < extra_dump_files_in_use; i++)
      any |= dump_switch_p_1 (arg, &extra_dump_files[i], true);


  return any;
}

/* Dump FUNCTION_DECL FN as tree dump PHASE.  */

void
dump_function (enum tree_dump_index phase, tree fn)
{
  FILE *stream;
  int flags;

  stream = dump_begin (phase, &flags);
  if (stream)
    {
      dump_function_to_file (fn, stream, flags);
      dump_end (phase, stream);
    }
}

bool
enable_rtl_dump_file (int letter)
{
  if (letter == 'a')
    letter = 0;

  return dump_enable_all (TDF_RTL, letter) > 0;
}