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2015-05-22 Eric Botcazou <ebotcazou@adacore.com>
[official-gcc.git] / gcc / ada / treepr.adb
blob8ad81b9ed1c8fc6a526eeb64f337ba9723930777
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- T R E E P R --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 with Aspects; use Aspects;
27 with Atree; use Atree;
28 with Csets; use Csets;
29 with Debug; use Debug;
30 with Einfo; use Einfo;
31 with Elists; use Elists;
32 with Lib; use Lib;
33 with Namet; use Namet;
34 with Nlists; use Nlists;
35 with Output; use Output;
36 with Sem_Mech; use Sem_Mech;
37 with Sinfo; use Sinfo;
38 with Snames; use Snames;
39 with Sinput; use Sinput;
40 with Stand; use Stand;
41 with Stringt; use Stringt;
42 with SCIL_LL; use SCIL_LL;
43 with Treeprs; use Treeprs;
44 with Uintp; use Uintp;
45 with Urealp; use Urealp;
46 with Uname; use Uname;
47 with Unchecked_Deallocation;
48
49 package body Treepr is
50
51 use Atree.Unchecked_Access;
52 -- This module uses the unchecked access functions in package Atree
53 -- since it does an untyped traversal of the tree (we do not want to
54 -- count on the structure of the tree being correct in this routine).
55
56 ----------------------------------
57 -- Approach Used for Tree Print --
58 ----------------------------------
59
60 -- When a complete subtree is being printed, a trace phase first marks
61 -- the nodes and lists to be printed. This trace phase allocates logical
62 -- numbers corresponding to the order in which the nodes and lists will
63 -- be printed. The Node_Id, List_Id and Elist_Id values are mapped to
64 -- logical node numbers using a hash table. Output is done using a set
65 -- of Print_xxx routines, which are similar to the Write_xxx routines
66 -- with the same name, except that they do not generate any output in
67 -- the marking phase. This allows identical logic to be used in the
68 -- two phases.
69
70 -- Note that the hash table not only holds the serial numbers, but also
71 -- acts as a record of which nodes have already been visited. In the
72 -- marking phase, a node has been visited if it is already in the hash
73 -- table, and in the printing phase, we can tell whether a node has
74 -- already been printed by looking at the value of the serial number.
75
76 ----------------------
77 -- Global Variables --
78 ----------------------
79
80 type Hash_Record is record
81 Serial : Nat;
82 -- Serial number for hash table entry. A value of zero means that
83 -- the entry is currently unused.
84
85 Id : Int;
86 -- If serial number field is non-zero, contains corresponding Id value
87 end record;
88
89 type Hash_Table_Type is array (Nat range <>) of Hash_Record;
90 type Access_Hash_Table_Type is access Hash_Table_Type;
91 Hash_Table : Access_Hash_Table_Type;
92 -- The hash table itself, see Serial_Number function for details of use
93
94 Hash_Table_Len : Nat;
95 -- Range of Hash_Table is from 0 .. Hash_Table_Len - 1 so that dividing
96 -- by Hash_Table_Len gives a remainder that is in Hash_Table'Range.
97
98 Next_Serial_Number : Nat;
99 -- Number of last visited node or list. Used during the marking phase to
100 -- set proper node numbers in the hash table, and during the printing
101 -- phase to make sure that a given node is not printed more than once.
102 -- (nodes are printed in order during the printing phase, that's the
103 -- point of numbering them in the first place).
104
105 Printing_Descendants : Boolean;
106 -- True if descendants are being printed, False if not. In the false case,
107 -- only node Id's are printed. In the true case, node numbers as well as
108 -- node Id's are printed, as described above.
109
110 type Phase_Type is (Marking, Printing);
111 -- Type for Phase variable
112
113 Phase : Phase_Type;
114 -- When an entire tree is being printed, the traversal operates in two
115 -- phases. The first phase marks the nodes in use by installing node
116 -- numbers in the node number table. The second phase prints the nodes.
117 -- This variable indicates the current phase.
118
119 ----------------------
120 -- Local Procedures --
121 ----------------------
122
123 procedure Print_End_Span (N : Node_Id);
124 -- Special routine to print contents of End_Span field of node N.
125 -- The format includes the implicit source location as well as the
126 -- value of the field.
127
128 procedure Print_Init;
129 -- Initialize for printing of tree with descendents
130
131 procedure Print_Term;
132 -- Clean up after printing of tree with descendents
133
134 procedure Print_Char (C : Character);
135 -- Print character C if currently in print phase, noop if in marking phase
136
137 procedure Print_Name (N : Name_Id);
138 -- Print name from names table if currently in print phase, noop if in
139 -- marking phase. Note that the name is output in mixed case mode.
140
141 procedure Print_Node_Header (N : Node_Id);
142 -- Print header line used by Print_Node and Print_Node_Briefly
143
144 procedure Print_Node_Kind (N : Node_Id);
145 -- Print node kind name in mixed case if in print phase, noop if in
146 -- marking phase.
147
148 procedure Print_Str (S : String);
149 -- Print string S if currently in print phase, noop if in marking phase
150
151 procedure Print_Str_Mixed_Case (S : String);
152 -- Like Print_Str, except that the string is printed in mixed case mode
153
154 procedure Print_Int (I : Int);
155 -- Print integer I if currently in print phase, noop if in marking phase
156
157 procedure Print_Eol;
158 -- Print end of line if currently in print phase, noop if in marking phase
159
160 procedure Print_Node_Ref (N : Node_Id);
161 -- Print "<empty>", "<error>" or "Node #nnn" with additional information
162 -- in the latter case, including the Id and the Nkind of the node.
163
164 procedure Print_List_Ref (L : List_Id);
165 -- Print "<no list>", or "<empty node list>" or "Node list #nnn"
166
167 procedure Print_Elist_Ref (E : Elist_Id);
168 -- Print "<no elist>", or "<empty element list>" or "Element list #nnn"
169
170 procedure Print_Entity_Info (Ent : Entity_Id; Prefix : String);
171 -- Called if the node being printed is an entity. Prints fields from the
172 -- extension, using routines in Einfo to get the field names and flags.
173
174 procedure Print_Field (Val : Union_Id; Format : UI_Format := Auto);
175 -- Print representation of Field value (name, tree, string, uint, charcode)
176 -- The format parameter controls the format of printing in the case of an
177 -- integer value (see UI_Write for details).
178
179 procedure Print_Flag (F : Boolean);
180 -- Print True or False
181
182 procedure Print_Node
183 (N : Node_Id;
184 Prefix_Str : String;
185 Prefix_Char : Character);
186 -- This is the internal routine used to print a single node. Each line of
187 -- output is preceded by Prefix_Str (which is used to set the indentation
188 -- level and the bars used to link list elements). In addition, for lines
189 -- other than the first, an additional character Prefix_Char is output.
190
191 function Serial_Number (Id : Int) return Nat;
192 -- Given a Node_Id, List_Id or Elist_Id, returns the previously assigned
193 -- serial number, or zero if no serial number has yet been assigned.
194
195 procedure Set_Serial_Number;
196 -- Can be called only immediately following a call to Serial_Number that
197 -- returned a value of zero. Causes the value of Next_Serial_Number to be
198 -- placed in the hash table (corresponding to the Id argument used in the
199 -- Serial_Number call), and increments Next_Serial_Number.
200
201 procedure Visit_Node
202 (N : Node_Id;
203 Prefix_Str : String;
204 Prefix_Char : Character);
205 -- Called to process a single node in the case where descendents are to
206 -- be printed before every line, and Prefix_Char added to all lines
207 -- except the header line for the node.
208
209 procedure Visit_List (L : List_Id; Prefix_Str : String);
210 -- Visit_List is called to process a list in the case where descendents
211 -- are to be printed. Prefix_Str is to be added to all printed lines.
212
213 procedure Visit_Elist (E : Elist_Id; Prefix_Str : String);
214 -- Visit_Elist is called to process an element list in the case where
215 -- descendents are to be printed. Prefix_Str is to be added to all
216 -- printed lines.
217
218 -------
219 -- p --
220 -------
221
222 function p (N : Union_Id) return Node_Or_Entity_Id is
223 begin
224 case N is
225 when List_Low_Bound .. List_High_Bound - 1 =>
226 return Nlists.Parent (List_Id (N));
227
228 when Node_Range =>
229 return Atree.Parent (Node_Or_Entity_Id (N));
230
231 when others =>
232 Write_Int (Int (N));
233 Write_Str (" is not a Node_Id or List_Id value");
234 Write_Eol;
235 return Empty;
236 end case;
237 end p;
238
239 ---------
240 -- par --
241 ---------
242
243 function par (N : Union_Id) return Node_Or_Entity_Id renames p;
244
245 --------
246 -- pe --
247 --------
248
249 procedure pe (N : Union_Id) renames pn;
250
251 --------
252 -- pl --
253 --------
254
255 procedure pl (L : Int) is
256 Lid : Int;
257
258 begin
259 if L < 0 then
260 Lid := L;
261
262 -- This is the case where we transform e.g. +36 to -99999936
263
264 else
265 if L <= 9 then
266 Lid := -(99999990 + L);
267 elsif L <= 99 then
268 Lid := -(99999900 + L);
269 elsif L <= 999 then
270 Lid := -(99999000 + L);
271 elsif L <= 9999 then
272 Lid := -(99990000 + L);
273 elsif L <= 99999 then
274 Lid := -(99900000 + L);
275 elsif L <= 999999 then
276 Lid := -(99000000 + L);
277 elsif L <= 9999999 then
278 Lid := -(90000000 + L);
279 else
280 Lid := -L;
281 end if;
282 end if;
283
284 -- Now output the list
285
286 Print_Tree_List (List_Id (Lid));
287 end pl;
288
289 --------
290 -- pn --
291 --------
292
293 procedure pn (N : Union_Id) is
294 begin
295 case N is
296 when List_Low_Bound .. List_High_Bound - 1 =>
297 pl (Int (N));
298 when Node_Range =>
299 Print_Tree_Node (Node_Id (N));
300 when Elist_Range =>
301 Print_Tree_Elist (Elist_Id (N));
302 when Elmt_Range =>
303 declare
304 Id : constant Elmt_Id := Elmt_Id (N);
305 begin
306 if No (Id) then
307 Write_Str ("No_Elmt");
308 Write_Eol;
309 else
310 Write_Str ("Elmt_Id --> ");
311 Print_Tree_Node (Node (Id));
312 end if;
313 end;
314 when Names_Range =>
315 Namet.wn (Name_Id (N));
316 when Strings_Range =>
317 Write_String_Table_Entry (String_Id (N));
318 when Uint_Range =>
319 Uintp.pid (From_Union (N));
320 when Ureal_Range =>
321 Urealp.pr (From_Union (N));
322 when others =>
323 Write_Str ("Invalid Union_Id: ");
324 Write_Int (Int (N));
325 Write_Eol;
326 end case;
327 end pn;
328
329 --------
330 -- pp --
331 --------
332
333 procedure pp (N : Union_Id) renames pn;
334
335 ---------
336 -- ppp --
337 ---------
338
339 procedure ppp (N : Union_Id) renames pt;
340
341 ----------------
342 -- Print_Char --
343 ----------------
344
345 procedure Print_Char (C : Character) is
346 begin
347 if Phase = Printing then
348 Write_Char (C);
349 end if;
350 end Print_Char;
351
352 ---------------------
353 -- Print_Elist_Ref --
354 ---------------------
355
356 procedure Print_Elist_Ref (E : Elist_Id) is
357 begin
358 if Phase /= Printing then
359 return;
360 end if;
361
362 if E = No_Elist then
363 Write_Str ("<no elist>");
364
365 elsif Is_Empty_Elmt_List (E) then
366 Write_Str ("Empty elist, (Elist_Id=");
367 Write_Int (Int (E));
368 Write_Char (')');
369
370 else
371 Write_Str ("(Elist_Id=");
372 Write_Int (Int (E));
373 Write_Char (')');
374
375 if Printing_Descendants then
376 Write_Str (" #");
377 Write_Int (Serial_Number (Int (E)));
378 end if;
379 end if;
380 end Print_Elist_Ref;
381
382 -------------------------
383 -- Print_Elist_Subtree --
384 -------------------------
385
386 procedure Print_Elist_Subtree (E : Elist_Id) is
387 begin
388 Print_Init;
389
390 Next_Serial_Number := 1;
391 Phase := Marking;
392 Visit_Elist (E, "");
393
394 Next_Serial_Number := 1;
395 Phase := Printing;
396 Visit_Elist (E, "");
397
398 Print_Term;
399 end Print_Elist_Subtree;
400
401 --------------------
402 -- Print_End_Span --
403 --------------------
404
405 procedure Print_End_Span (N : Node_Id) is
406 Val : constant Uint := End_Span (N);
407
408 begin
409 UI_Write (Val);
410 Write_Str (" (Uint = ");
411 Write_Int (Int (Field5 (N)));
412 Write_Str (") ");
413
414 if Val /= No_Uint then
415 Write_Location (End_Location (N));
416 end if;
417 end Print_End_Span;
418
419 -----------------------
420 -- Print_Entity_Info --
421 -----------------------
422
423 procedure Print_Entity_Info (Ent : Entity_Id; Prefix : String) is
424 function Field_Present (U : Union_Id) return Boolean;
425 -- Returns False unless the value U represents a missing value
426 -- (Empty, No_Uint, No_Ureal or No_String)
427
428 function Field_Present (U : Union_Id) return Boolean is
429 begin
430 return
431 U /= Union_Id (Empty) and then
432 U /= To_Union (No_Uint) and then
433 U /= To_Union (No_Ureal) and then
434 U /= Union_Id (No_String);
435 end Field_Present;
436
437 -- Start of processing for Print_Entity_Info
438
439 begin
440 Print_Str (Prefix);
441 Print_Str ("Ekind = ");
442 Print_Str_Mixed_Case (Entity_Kind'Image (Ekind (Ent)));
443 Print_Eol;
444
445 Print_Str (Prefix);
446 Print_Str ("Etype = ");
447 Print_Node_Ref (Etype (Ent));
448 Print_Eol;
449
450 if Convention (Ent) /= Convention_Ada then
451 Print_Str (Prefix);
452 Print_Str ("Convention = ");
453
454 -- Print convention name skipping the Convention_ at the start
455
456 declare
457 S : constant String := Convention_Id'Image (Convention (Ent));
458
459 begin
460 Print_Str_Mixed_Case (S (12 .. S'Last));
461 Print_Eol;
462 end;
463 end if;
464
465 if Field_Present (Field6 (Ent)) then
466 Print_Str (Prefix);
467 Write_Field6_Name (Ent);
468 Write_Str (" = ");
469 Print_Field (Field6 (Ent));
470 Print_Eol;
471 end if;
472
473 if Field_Present (Field7 (Ent)) then
474 Print_Str (Prefix);
475 Write_Field7_Name (Ent);
476 Write_Str (" = ");
477 Print_Field (Field7 (Ent));
478 Print_Eol;
479 end if;
480
481 if Field_Present (Field8 (Ent)) then
482 Print_Str (Prefix);
483 Write_Field8_Name (Ent);
484 Write_Str (" = ");
485 Print_Field (Field8 (Ent));
486 Print_Eol;
487 end if;
488
489 if Field_Present (Field9 (Ent)) then
490 Print_Str (Prefix);
491 Write_Field9_Name (Ent);
492 Write_Str (" = ");
493 Print_Field (Field9 (Ent));
494 Print_Eol;
495 end if;
496
497 if Field_Present (Field10 (Ent)) then
498 Print_Str (Prefix);
499 Write_Field10_Name (Ent);
500 Write_Str (" = ");
501 Print_Field (Field10 (Ent));
502 Print_Eol;
503 end if;
504
505 if Field_Present (Field11 (Ent)) then
506 Print_Str (Prefix);
507 Write_Field11_Name (Ent);
508 Write_Str (" = ");
509 Print_Field (Field11 (Ent));
510 Print_Eol;
511 end if;
512
513 if Field_Present (Field12 (Ent)) then
514 Print_Str (Prefix);
515 Write_Field12_Name (Ent);
516 Write_Str (" = ");
517 Print_Field (Field12 (Ent));
518 Print_Eol;
519 end if;
520
521 if Field_Present (Field13 (Ent)) then
522 Print_Str (Prefix);
523 Write_Field13_Name (Ent);
524 Write_Str (" = ");
525 Print_Field (Field13 (Ent));
526 Print_Eol;
527 end if;
528
529 if Field_Present (Field14 (Ent)) then
530 Print_Str (Prefix);
531 Write_Field14_Name (Ent);
532 Write_Str (" = ");
533 Print_Field (Field14 (Ent));
534 Print_Eol;
535 end if;
536
537 if Field_Present (Field15 (Ent)) then
538 Print_Str (Prefix);
539 Write_Field15_Name (Ent);
540 Write_Str (" = ");
541 Print_Field (Field15 (Ent));
542 Print_Eol;
543 end if;
544
545 if Field_Present (Field16 (Ent)) then
546 Print_Str (Prefix);
547 Write_Field16_Name (Ent);
548 Write_Str (" = ");
549 Print_Field (Field16 (Ent));
550 Print_Eol;
551 end if;
552
553 if Field_Present (Field17 (Ent)) then
554 Print_Str (Prefix);
555 Write_Field17_Name (Ent);
556 Write_Str (" = ");
557 Print_Field (Field17 (Ent));
558 Print_Eol;
559 end if;
560
561 if Field_Present (Field18 (Ent)) then
562 Print_Str (Prefix);
563 Write_Field18_Name (Ent);
564 Write_Str (" = ");
565 Print_Field (Field18 (Ent));
566 Print_Eol;
567 end if;
568
569 if Field_Present (Field19 (Ent)) then
570 Print_Str (Prefix);
571 Write_Field19_Name (Ent);
572 Write_Str (" = ");
573 Print_Field (Field19 (Ent));
574 Print_Eol;
575 end if;
576
577 if Field_Present (Field20 (Ent)) then
578 Print_Str (Prefix);
579 Write_Field20_Name (Ent);
580 Write_Str (" = ");
581 Print_Field (Field20 (Ent));
582 Print_Eol;
583 end if;
584
585 if Field_Present (Field21 (Ent)) then
586 Print_Str (Prefix);
587 Write_Field21_Name (Ent);
588 Write_Str (" = ");
589 Print_Field (Field21 (Ent));
590 Print_Eol;
591 end if;
592
593 if Field_Present (Field22 (Ent)) then
594 Print_Str (Prefix);
595 Write_Field22_Name (Ent);
596 Write_Str (" = ");
597
598 -- Mechanism case has to be handled specially
599
600 if Ekind (Ent) = E_Function or else Is_Formal (Ent) then
601 declare
602 M : constant Mechanism_Type := Mechanism (Ent);
603
604 begin
605 case M is
606 when Default_Mechanism =>
607 Write_Str ("Default");
608
609 when By_Copy =>
610 Write_Str ("By_Copy");
611
612 when By_Reference =>
613 Write_Str ("By_Reference");
614
615 when 1 .. Mechanism_Type'Last =>
616 Write_Str ("By_Copy if size <= ");
617 Write_Int (Int (M));
618 end case;
619 end;
620
621 -- Normal case (not Mechanism)
622
623 else
624 Print_Field (Field22 (Ent));
625 end if;
626
627 Print_Eol;
628 end if;
629
630 if Field_Present (Field23 (Ent)) then
631 Print_Str (Prefix);
632 Write_Field23_Name (Ent);
633 Write_Str (" = ");
634 Print_Field (Field23 (Ent));
635 Print_Eol;
636 end if;
637
638 if Field_Present (Field24 (Ent)) then
639 Print_Str (Prefix);
640 Write_Field24_Name (Ent);
641 Write_Str (" = ");
642 Print_Field (Field24 (Ent));
643 Print_Eol;
644 end if;
645
646 if Field_Present (Field25 (Ent)) then
647 Print_Str (Prefix);
648 Write_Field25_Name (Ent);
649 Write_Str (" = ");
650 Print_Field (Field25 (Ent));
651 Print_Eol;
652 end if;
653
654 if Field_Present (Field26 (Ent)) then
655 Print_Str (Prefix);
656 Write_Field26_Name (Ent);
657 Write_Str (" = ");
658 Print_Field (Field26 (Ent));
659 Print_Eol;
660 end if;
661
662 if Field_Present (Field27 (Ent)) then
663 Print_Str (Prefix);
664 Write_Field27_Name (Ent);
665 Write_Str (" = ");
666 Print_Field (Field27 (Ent));
667 Print_Eol;
668 end if;
669
670 if Field_Present (Field28 (Ent)) then
671 Print_Str (Prefix);
672 Write_Field28_Name (Ent);
673 Write_Str (" = ");
674 Print_Field (Field28 (Ent));
675 Print_Eol;
676 end if;
677
678 if Field_Present (Field29 (Ent)) then
679 Print_Str (Prefix);
680 Write_Field29_Name (Ent);
681 Write_Str (" = ");
682 Print_Field (Field29 (Ent));
683 Print_Eol;
684 end if;
685
686 if Field_Present (Field30 (Ent)) then
687 Print_Str (Prefix);
688 Write_Field30_Name (Ent);
689 Write_Str (" = ");
690 Print_Field (Field30 (Ent));
691 Print_Eol;
692 end if;
693
694 if Field_Present (Field31 (Ent)) then
695 Print_Str (Prefix);
696 Write_Field31_Name (Ent);
697 Write_Str (" = ");
698 Print_Field (Field31 (Ent));
699 Print_Eol;
700 end if;
701
702 if Field_Present (Field32 (Ent)) then
703 Print_Str (Prefix);
704 Write_Field32_Name (Ent);
705 Write_Str (" = ");
706 Print_Field (Field32 (Ent));
707 Print_Eol;
708 end if;
709
710 if Field_Present (Field33 (Ent)) then
711 Print_Str (Prefix);
712 Write_Field33_Name (Ent);
713 Write_Str (" = ");
714 Print_Field (Field33 (Ent));
715 Print_Eol;
716 end if;
717
718 if Field_Present (Field34 (Ent)) then
719 Print_Str (Prefix);
720 Write_Field34_Name (Ent);
721 Write_Str (" = ");
722 Print_Field (Field34 (Ent));
723 Print_Eol;
724 end if;
725
726 if Field_Present (Field35 (Ent)) then
727 Print_Str (Prefix);
728 Write_Field35_Name (Ent);
729 Write_Str (" = ");
730 Print_Field (Field35 (Ent));
731 Print_Eol;
732 end if;
733
734 if Field_Present (Field36 (Ent)) then
735 Print_Str (Prefix);
736 Write_Field36_Name (Ent);
737 Write_Str (" = ");
738 Print_Field (Field36 (Ent));
739 Print_Eol;
740 end if;
741
742 if Field_Present (Field37 (Ent)) then
743 Print_Str (Prefix);
744 Write_Field37_Name (Ent);
745 Write_Str (" = ");
746 Print_Field (Field37 (Ent));
747 Print_Eol;
748 end if;
749
750 if Field_Present (Field38 (Ent)) then
751 Print_Str (Prefix);
752 Write_Field38_Name (Ent);
753 Write_Str (" = ");
754 Print_Field (Field38 (Ent));
755 Print_Eol;
756 end if;
757
758 if Field_Present (Field39 (Ent)) then
759 Print_Str (Prefix);
760 Write_Field39_Name (Ent);
761 Write_Str (" = ");
762 Print_Field (Field39 (Ent));
763 Print_Eol;
764 end if;
765
766 if Field_Present (Field40 (Ent)) then
767 Print_Str (Prefix);
768 Write_Field40_Name (Ent);
769 Write_Str (" = ");
770 Print_Field (Field40 (Ent));
771 Print_Eol;
772 end if;
773
774 if Field_Present (Field41 (Ent)) then
775 Print_Str (Prefix);
776 Write_Field41_Name (Ent);
777 Write_Str (" = ");
778 Print_Field (Field41 (Ent));
779 Print_Eol;
780 end if;
781
782 Write_Entity_Flags (Ent, Prefix);
783 end Print_Entity_Info;
784
785 ---------------
786 -- Print_Eol --
787 ---------------
788
789 procedure Print_Eol is
790 begin
791 if Phase = Printing then
792 Write_Eol;
793 end if;
794 end Print_Eol;
795
796 -----------------
797 -- Print_Field --
798 -----------------
799
800 procedure Print_Field (Val : Union_Id; Format : UI_Format := Auto) is
801 begin
802 if Phase /= Printing then
803 return;
804 end if;
805
806 if Val in Node_Range then
807 Print_Node_Ref (Node_Id (Val));
808
809 elsif Val in List_Range then
810 Print_List_Ref (List_Id (Val));
811
812 elsif Val in Elist_Range then
813 Print_Elist_Ref (Elist_Id (Val));
814
815 elsif Val in Names_Range then
816 Print_Name (Name_Id (Val));
817 Write_Str (" (Name_Id=");
818 Write_Int (Int (Val));
819 Write_Char (')');
820
821 elsif Val in Strings_Range then
822 Write_String_Table_Entry (String_Id (Val));
823 Write_Str (" (String_Id=");
824 Write_Int (Int (Val));
825 Write_Char (')');
826
827 elsif Val in Uint_Range then
828 UI_Write (From_Union (Val), Format);
829 Write_Str (" (Uint = ");
830 Write_Int (Int (Val));
831 Write_Char (')');
832
833 elsif Val in Ureal_Range then
834 UR_Write (From_Union (Val));
835 Write_Str (" (Ureal = ");
836 Write_Int (Int (Val));
837 Write_Char (')');
838
839 else
840 Print_Str ("****** Incorrect value = ");
841 Print_Int (Int (Val));
842 end if;
843 end Print_Field;
844
845 ----------------
846 -- Print_Flag --
847 ----------------
848
849 procedure Print_Flag (F : Boolean) is
850 begin
851 if F then
852 Print_Str ("True");
853 else
854 Print_Str ("False");
855 end if;
856 end Print_Flag;
857
858 ----------------
859 -- Print_Init --
860 ----------------
861
862 procedure Print_Init is
863 begin
864 Printing_Descendants := True;
865 Write_Eol;
866
867 -- Allocate and clear serial number hash table. The size is 150% of
868 -- the maximum possible number of entries, so that the hash table
869 -- cannot get significantly overloaded.
870
871 Hash_Table_Len := (150 * (Num_Nodes + Num_Lists + Num_Elists)) / 100;
872 Hash_Table := new Hash_Table_Type (0 .. Hash_Table_Len - 1);
873
874 for J in Hash_Table'Range loop
875 Hash_Table (J).Serial := 0;
876 end loop;
877
878 end Print_Init;
879
880 ---------------
881 -- Print_Int --
882 ---------------
883
884 procedure Print_Int (I : Int) is
885 begin
886 if Phase = Printing then
887 Write_Int (I);
888 end if;
889 end Print_Int;
890
891 --------------------
892 -- Print_List_Ref --
893 --------------------
894
895 procedure Print_List_Ref (L : List_Id) is
896 begin
897 if Phase /= Printing then
898 return;
899 end if;
900
901 if No (L) then
902 Write_Str ("<no list>");
903
904 elsif Is_Empty_List (L) then
905 Write_Str ("<empty list> (List_Id=");
906 Write_Int (Int (L));
907 Write_Char (')');
908
909 else
910 Write_Str ("List");
911
912 if Printing_Descendants then
913 Write_Str (" #");
914 Write_Int (Serial_Number (Int (L)));
915 end if;
916
917 Write_Str (" (List_Id=");
918 Write_Int (Int (L));
919 Write_Char (')');
920 end if;
921 end Print_List_Ref;
922
923 ------------------------
924 -- Print_List_Subtree --
925 ------------------------
926
927 procedure Print_List_Subtree (L : List_Id) is
928 begin
929 Print_Init;
930
931 Next_Serial_Number := 1;
932 Phase := Marking;
933 Visit_List (L, "");
934
935 Next_Serial_Number := 1;
936 Phase := Printing;
937 Visit_List (L, "");
938
939 Print_Term;
940 end Print_List_Subtree;
941
942 ----------------
943 -- Print_Name --
944 ----------------
945
946 procedure Print_Name (N : Name_Id) is
947 begin
948 if Phase = Printing then
949 if N = No_Name then
950 Print_Str ("<No_Name>");
951
952 elsif N = Error_Name then
953 Print_Str ("<Error_Name>");
954
955 elsif Is_Valid_Name (N) then
956 Get_Name_String (N);
957 Print_Char ('"');
958 Write_Name (N);
959 Print_Char ('"');
960
961 else
962 Print_Str ("<invalid name ???>");
963 end if;
964 end if;
965 end Print_Name;
966
967 ----------------
968 -- Print_Node --
969 ----------------
970
971 procedure Print_Node
972 (N : Node_Id;
973 Prefix_Str : String;
974 Prefix_Char : Character)
975 is
976 F : Fchar;
977 P : Natural := Pchar_Pos (Nkind (N));
978
979 Field_To_Be_Printed : Boolean;
980 Prefix_Str_Char : String (Prefix_Str'First .. Prefix_Str'Last + 1);
981
982 Sfile : Source_File_Index;
983 Fmt : UI_Format;
984
985 begin
986 if Phase /= Printing then
987 return;
988 end if;
989
990 if Nkind (N) = N_Integer_Literal and then Print_In_Hex (N) then
991 Fmt := Hex;
992 else
993 Fmt := Auto;
994 end if;
995
996 Prefix_Str_Char (Prefix_Str'Range) := Prefix_Str;
997 Prefix_Str_Char (Prefix_Str'Last + 1) := Prefix_Char;
998
999 -- Print header line
1000
1001 Print_Str (Prefix_Str);
1002 Print_Node_Header (N);
1003
1004 if Is_Rewrite_Substitution (N) then
1005 Print_Str (Prefix_Str);
1006 Print_Str (" Rewritten: original node = ");
1007 Print_Node_Ref (Original_Node (N));
1008 Print_Eol;
1009 end if;
1010
1011 if N = Empty then
1012 return;
1013 end if;
1014
1015 if not Is_List_Member (N) then
1016 Print_Str (Prefix_Str);
1017 Print_Str (" Parent = ");
1018 Print_Node_Ref (Parent (N));
1019 Print_Eol;
1020 end if;
1021
1022 -- Print Sloc field if it is set
1023
1024 if Sloc (N) /= No_Location then
1025 Print_Str (Prefix_Str_Char);
1026 Print_Str ("Sloc = ");
1027
1028 if Sloc (N) = Standard_Location then
1029 Print_Str ("Standard_Location");
1030
1031 elsif Sloc (N) = Standard_ASCII_Location then
1032 Print_Str ("Standard_ASCII_Location");
1033
1034 else
1035 Sfile := Get_Source_File_Index (Sloc (N));
1036 Print_Int (Int (Sloc (N)) - Int (Source_Text (Sfile)'First));
1037 Write_Str (" ");
1038 Write_Location (Sloc (N));
1039 end if;
1040
1041 Print_Eol;
1042 end if;
1043
1044 -- Print Chars field if present
1045
1046 if Nkind (N) in N_Has_Chars and then Chars (N) /= No_Name then
1047 Print_Str (Prefix_Str_Char);
1048 Print_Str ("Chars = ");
1049 Print_Name (Chars (N));
1050 Write_Str (" (Name_Id=");
1051 Write_Int (Int (Chars (N)));
1052 Write_Char (')');
1053 Print_Eol;
1054 end if;
1055
1056 -- Special field print operations for non-entity nodes
1057
1058 if Nkind (N) not in N_Entity then
1059
1060 -- Deal with Left_Opnd and Right_Opnd fields
1061
1062 if Nkind (N) in N_Op
1063 or else Nkind (N) in N_Short_Circuit
1064 or else Nkind (N) in N_Membership_Test
1065 then
1066 -- Print Left_Opnd if present
1067
1068 if Nkind (N) not in N_Unary_Op then
1069 Print_Str (Prefix_Str_Char);
1070 Print_Str ("Left_Opnd = ");
1071 Print_Node_Ref (Left_Opnd (N));
1072 Print_Eol;
1073 end if;
1074
1075 -- Print Right_Opnd
1076
1077 Print_Str (Prefix_Str_Char);
1078 Print_Str ("Right_Opnd = ");
1079 Print_Node_Ref (Right_Opnd (N));
1080 Print_Eol;
1081 end if;
1082
1083 -- Print Entity field if operator (other cases of Entity
1084 -- are in the table, so are handled in the normal circuit)
1085
1086 if Nkind (N) in N_Op and then Present (Entity (N)) then
1087 Print_Str (Prefix_Str_Char);
1088 Print_Str ("Entity = ");
1089 Print_Node_Ref (Entity (N));
1090 Print_Eol;
1091 end if;
1092
1093 -- Print special fields if we have a subexpression
1094
1095 if Nkind (N) in N_Subexpr then
1096
1097 if Assignment_OK (N) then
1098 Print_Str (Prefix_Str_Char);
1099 Print_Str ("Assignment_OK = True");
1100 Print_Eol;
1101 end if;
1102
1103 if Do_Range_Check (N) then
1104 Print_Str (Prefix_Str_Char);
1105 Print_Str ("Do_Range_Check = True");
1106 Print_Eol;
1107 end if;
1108
1109 if Has_Dynamic_Length_Check (N) then
1110 Print_Str (Prefix_Str_Char);
1111 Print_Str ("Has_Dynamic_Length_Check = True");
1112 Print_Eol;
1113 end if;
1114
1115 if Has_Aspects (N) then
1116 Print_Str (Prefix_Str_Char);
1117 Print_Str ("Has_Aspects = True");
1118 Print_Eol;
1119 end if;
1120
1121 if Has_Dynamic_Range_Check (N) then
1122 Print_Str (Prefix_Str_Char);
1123 Print_Str ("Has_Dynamic_Range_Check = True");
1124 Print_Eol;
1125 end if;
1126
1127 if Is_Controlling_Actual (N) then
1128 Print_Str (Prefix_Str_Char);
1129 Print_Str ("Is_Controlling_Actual = True");
1130 Print_Eol;
1131 end if;
1132
1133 if Is_Overloaded (N) then
1134 Print_Str (Prefix_Str_Char);
1135 Print_Str ("Is_Overloaded = True");
1136 Print_Eol;
1137 end if;
1138
1139 if Is_Static_Expression (N) then
1140 Print_Str (Prefix_Str_Char);
1141 Print_Str ("Is_Static_Expression = True");
1142 Print_Eol;
1143 end if;
1144
1145 if Must_Not_Freeze (N) then
1146 Print_Str (Prefix_Str_Char);
1147 Print_Str ("Must_Not_Freeze = True");
1148 Print_Eol;
1149 end if;
1150
1151 if Paren_Count (N) /= 0 then
1152 Print_Str (Prefix_Str_Char);
1153 Print_Str ("Paren_Count = ");
1154 Print_Int (Int (Paren_Count (N)));
1155 Print_Eol;
1156 end if;
1157
1158 if Raises_Constraint_Error (N) then
1159 Print_Str (Prefix_Str_Char);
1160 Print_Str ("Raise_Constraint_Error = True");
1161 Print_Eol;
1162 end if;
1163
1164 end if;
1165
1166 -- Print Do_Overflow_Check field if present
1167
1168 if Nkind (N) in N_Op and then Do_Overflow_Check (N) then
1169 Print_Str (Prefix_Str_Char);
1170 Print_Str ("Do_Overflow_Check = True");
1171 Print_Eol;
1172 end if;
1173
1174 -- Print Etype field if present (printing of this field for entities
1175 -- is handled by the Print_Entity_Info procedure).
1176
1177 if Nkind (N) in N_Has_Etype and then Present (Etype (N)) then
1178 Print_Str (Prefix_Str_Char);
1179 Print_Str ("Etype = ");
1180 Print_Node_Ref (Etype (N));
1181 Print_Eol;
1182 end if;
1183 end if;
1184
1185 -- Loop to print fields included in Pchars array
1186
1187 while P < Pchar_Pos (Node_Kind'Succ (Nkind (N))) loop
1188 F := Pchars (P);
1189 P := P + 1;
1190
1191 -- Check for case of False flag, which we never print, or
1192 -- an Empty field, which is also never printed
1193
1194 case F is
1195 when F_Field1 =>
1196 Field_To_Be_Printed := Field1 (N) /= Union_Id (Empty);
1197
1198 when F_Field2 =>
1199 Field_To_Be_Printed := Field2 (N) /= Union_Id (Empty);
1200
1201 when F_Field3 =>
1202 Field_To_Be_Printed := Field3 (N) /= Union_Id (Empty);
1203
1204 when F_Field4 =>
1205 Field_To_Be_Printed := Field4 (N) /= Union_Id (Empty);
1206
1207 when F_Field5 =>
1208 Field_To_Be_Printed := Field5 (N) /= Union_Id (Empty);
1209
1210 when F_Flag1 => Field_To_Be_Printed := Flag1 (N);
1211 when F_Flag2 => Field_To_Be_Printed := Flag2 (N);
1212 when F_Flag3 => Field_To_Be_Printed := Flag3 (N);
1213 when F_Flag4 => Field_To_Be_Printed := Flag4 (N);
1214 when F_Flag5 => Field_To_Be_Printed := Flag5 (N);
1215 when F_Flag6 => Field_To_Be_Printed := Flag6 (N);
1216 when F_Flag7 => Field_To_Be_Printed := Flag7 (N);
1217 when F_Flag8 => Field_To_Be_Printed := Flag8 (N);
1218 when F_Flag9 => Field_To_Be_Printed := Flag9 (N);
1219 when F_Flag10 => Field_To_Be_Printed := Flag10 (N);
1220 when F_Flag11 => Field_To_Be_Printed := Flag11 (N);
1221 when F_Flag12 => Field_To_Be_Printed := Flag12 (N);
1222 when F_Flag13 => Field_To_Be_Printed := Flag13 (N);
1223 when F_Flag14 => Field_To_Be_Printed := Flag14 (N);
1224 when F_Flag15 => Field_To_Be_Printed := Flag15 (N);
1225 when F_Flag16 => Field_To_Be_Printed := Flag16 (N);
1226 when F_Flag17 => Field_To_Be_Printed := Flag17 (N);
1227 when F_Flag18 => Field_To_Be_Printed := Flag18 (N);
1228 end case;
1229
1230 -- Print field if it is to be printed
1231
1232 if Field_To_Be_Printed then
1233 Print_Str (Prefix_Str_Char);
1234
1235 while P < Pchar_Pos (Node_Kind'Succ (Nkind (N)))
1236 and then Pchars (P) not in Fchar
1237 loop
1238 Print_Char (Pchars (P));
1239 P := P + 1;
1240 end loop;
1241
1242 Print_Str (" = ");
1243
1244 case F is
1245 when F_Field1 => Print_Field (Field1 (N), Fmt);
1246 when F_Field2 => Print_Field (Field2 (N), Fmt);
1247 when F_Field3 => Print_Field (Field3 (N), Fmt);
1248 when F_Field4 => Print_Field (Field4 (N), Fmt);
1249
1250 -- Special case End_Span = Uint5
1251
1252 when F_Field5 =>
1253 if Nkind_In (N, N_Case_Statement, N_If_Statement) then
1254 Print_End_Span (N);
1255 else
1256 Print_Field (Field5 (N), Fmt);
1257 end if;
1258
1259 when F_Flag1 => Print_Flag (Flag1 (N));
1260 when F_Flag2 => Print_Flag (Flag2 (N));
1261 when F_Flag3 => Print_Flag (Flag3 (N));
1262 when F_Flag4 => Print_Flag (Flag4 (N));
1263 when F_Flag5 => Print_Flag (Flag5 (N));
1264 when F_Flag6 => Print_Flag (Flag6 (N));
1265 when F_Flag7 => Print_Flag (Flag7 (N));
1266 when F_Flag8 => Print_Flag (Flag8 (N));
1267 when F_Flag9 => Print_Flag (Flag9 (N));
1268 when F_Flag10 => Print_Flag (Flag10 (N));
1269 when F_Flag11 => Print_Flag (Flag11 (N));
1270 when F_Flag12 => Print_Flag (Flag12 (N));
1271 when F_Flag13 => Print_Flag (Flag13 (N));
1272 when F_Flag14 => Print_Flag (Flag14 (N));
1273 when F_Flag15 => Print_Flag (Flag15 (N));
1274 when F_Flag16 => Print_Flag (Flag16 (N));
1275 when F_Flag17 => Print_Flag (Flag17 (N));
1276 when F_Flag18 => Print_Flag (Flag18 (N));
1277 end case;
1278
1279 Print_Eol;
1280
1281 -- Field is not to be printed (False flag field)
1282
1283 else
1284 while P < Pchar_Pos (Node_Kind'Succ (Nkind (N)))
1285 and then Pchars (P) not in Fchar
1286 loop
1287 P := P + 1;
1288 end loop;
1289 end if;
1290 end loop;
1291
1292 -- Print aspects if present
1293
1294 if Has_Aspects (N) then
1295 Print_Str (Prefix_Str_Char);
1296 Print_Str ("Aspect_Specifications = ");
1297 Print_Field (Union_Id (Aspect_Specifications (N)));
1298 Print_Eol;
1299 end if;
1300
1301 -- Print entity information for entities
1302
1303 if Nkind (N) in N_Entity then
1304 Print_Entity_Info (N, Prefix_Str_Char);
1305 end if;
1306
1307 -- Print the SCIL node (if available)
1308
1309 if Present (Get_SCIL_Node (N)) then
1310 Print_Str (Prefix_Str_Char);
1311 Print_Str ("SCIL_Node = ");
1312 Print_Node_Ref (Get_SCIL_Node (N));
1313 Print_Eol;
1314 end if;
1315 end Print_Node;
1316
1317 ------------------------
1318 -- Print_Node_Briefly --
1319 ------------------------
1320
1321 procedure Print_Node_Briefly (N : Node_Id) is
1322 begin
1323 Printing_Descendants := False;
1324 Phase := Printing;
1325 Print_Node_Header (N);
1326 end Print_Node_Briefly;
1327
1328 -----------------------
1329 -- Print_Node_Header --
1330 -----------------------
1331
1332 procedure Print_Node_Header (N : Node_Id) is
1333 Enumerate : Boolean := False;
1334 -- Flag set when enumerating multiple header flags
1335
1336 procedure Print_Header_Flag (Flag : String);
1337 -- Output one of the flags that appears in a node header. The routine
1338 -- automatically handles enumeration of multiple flags.
1339
1340 -----------------------
1341 -- Print_Header_Flag --
1342 -----------------------
1343
1344 procedure Print_Header_Flag (Flag : String) is
1345 begin
1346 if Enumerate then
1347 Print_Char (',');
1348 else
1349 Enumerate := True;
1350 Print_Char ('(');
1351 end if;
1352
1353 Print_Str (Flag);
1354 end Print_Header_Flag;
1355
1356 -- Start of processing for Print_Node_Header
1357
1358 begin
1359 Print_Node_Ref (N);
1360
1361 if N > Atree_Private_Part.Nodes.Last then
1362 Print_Str (" (no such node)");
1363 Print_Eol;
1364 return;
1365 end if;
1366
1367 Print_Char (' ');
1368
1369 if Comes_From_Source (N) then
1370 Print_Header_Flag ("source");
1371 end if;
1372
1373 if Analyzed (N) then
1374 Print_Header_Flag ("analyzed");
1375 end if;
1376
1377 if Error_Posted (N) then
1378 Print_Header_Flag ("posted");
1379 end if;
1380
1381 if Is_Ignored_Ghost_Node (N) then
1382 Print_Header_Flag ("ignored ghost");
1383 end if;
1384
1385 if Check_Actuals (N) then
1386 Print_Header_Flag ("check actuals");
1387 end if;
1388
1389 if Enumerate then
1390 Print_Char (')');
1391 end if;
1392
1393 Print_Eol;
1394 end Print_Node_Header;
1395
1396 ---------------------
1397 -- Print_Node_Kind --
1398 ---------------------
1399
1400 procedure Print_Node_Kind (N : Node_Id) is
1401 Ucase : Boolean;
1402 S : constant String := Node_Kind'Image (Nkind (N));
1403
1404 begin
1405 if Phase = Printing then
1406 Ucase := True;
1407
1408 -- Note: the call to Fold_Upper in this loop is to get past the GNAT
1409 -- bug of 'Image returning lower case instead of upper case.
1410
1411 for J in S'Range loop
1412 if Ucase then
1413 Write_Char (Fold_Upper (S (J)));
1414 else
1415 Write_Char (Fold_Lower (S (J)));
1416 end if;
1417
1418 Ucase := (S (J) = '_');
1419 end loop;
1420 end if;
1421 end Print_Node_Kind;
1422
1423 --------------------
1424 -- Print_Node_Ref --
1425 --------------------
1426
1427 procedure Print_Node_Ref (N : Node_Id) is
1428 S : Nat;
1429
1430 begin
1431 if Phase /= Printing then
1432 return;
1433 end if;
1434
1435 if N = Empty then
1436 Write_Str ("<empty>");
1437
1438 elsif N = Error then
1439 Write_Str ("<error>");
1440
1441 else
1442 if Printing_Descendants then
1443 S := Serial_Number (Int (N));
1444
1445 if S /= 0 then
1446 Write_Str ("Node");
1447 Write_Str (" #");
1448 Write_Int (S);
1449 Write_Char (' ');
1450 end if;
1451 end if;
1452
1453 Print_Node_Kind (N);
1454
1455 if Nkind (N) in N_Has_Chars then
1456 Write_Char (' ');
1457 Print_Name (Chars (N));
1458 end if;
1459
1460 if Nkind (N) in N_Entity then
1461 Write_Str (" (Entity_Id=");
1462 else
1463 Write_Str (" (Node_Id=");
1464 end if;
1465
1466 Write_Int (Int (N));
1467
1468 if Sloc (N) <= Standard_Location then
1469 Write_Char ('s');
1470 end if;
1471
1472 Write_Char (')');
1473
1474 end if;
1475 end Print_Node_Ref;
1476
1477 ------------------------
1478 -- Print_Node_Subtree --
1479 ------------------------
1480
1481 procedure Print_Node_Subtree (N : Node_Id) is
1482 begin
1483 Print_Init;
1484
1485 Next_Serial_Number := 1;
1486 Phase := Marking;
1487 Visit_Node (N, "", ' ');
1488
1489 Next_Serial_Number := 1;
1490 Phase := Printing;
1491 Visit_Node (N, "", ' ');
1492
1493 Print_Term;
1494 end Print_Node_Subtree;
1495
1496 ---------------
1497 -- Print_Str --
1498 ---------------
1499
1500 procedure Print_Str (S : String) is
1501 begin
1502 if Phase = Printing then
1503 Write_Str (S);
1504 end if;
1505 end Print_Str;
1506
1507 --------------------------
1508 -- Print_Str_Mixed_Case --
1509 --------------------------
1510
1511 procedure Print_Str_Mixed_Case (S : String) is
1512 Ucase : Boolean;
1513
1514 begin
1515 if Phase = Printing then
1516 Ucase := True;
1517
1518 for J in S'Range loop
1519 if Ucase then
1520 Write_Char (S (J));
1521 else
1522 Write_Char (Fold_Lower (S (J)));
1523 end if;
1524
1525 Ucase := (S (J) = '_');
1526 end loop;
1527 end if;
1528 end Print_Str_Mixed_Case;
1529
1530 ----------------
1531 -- Print_Term --
1532 ----------------
1533
1534 procedure Print_Term is
1535 procedure Free is new Unchecked_Deallocation
1536 (Hash_Table_Type, Access_Hash_Table_Type);
1537
1538 begin
1539 Free (Hash_Table);
1540 end Print_Term;
1541
1542 ---------------------
1543 -- Print_Tree_Elist --
1544 ---------------------
1545
1546 procedure Print_Tree_Elist (E : Elist_Id) is
1547 M : Elmt_Id;
1548
1549 begin
1550 Printing_Descendants := False;
1551 Phase := Printing;
1552
1553 Print_Elist_Ref (E);
1554 Print_Eol;
1555
1556 M := First_Elmt (E);
1557
1558 if No (M) then
1559 Print_Str ("<empty element list>");
1560 Print_Eol;
1561
1562 else
1563 loop
1564 Print_Char ('|');
1565 Print_Eol;
1566 exit when No (Next_Elmt (M));
1567 Print_Node (Node (M), "", '|');
1568 Next_Elmt (M);
1569 end loop;
1570
1571 Print_Node (Node (M), "", ' ');
1572 Print_Eol;
1573 end if;
1574 end Print_Tree_Elist;
1575
1576 ---------------------
1577 -- Print_Tree_List --
1578 ---------------------
1579
1580 procedure Print_Tree_List (L : List_Id) is
1581 N : Node_Id;
1582
1583 begin
1584 Printing_Descendants := False;
1585 Phase := Printing;
1586
1587 Print_List_Ref (L);
1588 Print_Str (" List_Id=");
1589 Print_Int (Int (L));
1590 Print_Eol;
1591
1592 N := First (L);
1593
1594 if N = Empty then
1595 Print_Str ("<empty node list>");
1596 Print_Eol;
1597
1598 else
1599 loop
1600 Print_Char ('|');
1601 Print_Eol;
1602 exit when Next (N) = Empty;
1603 Print_Node (N, "", '|');
1604 Next (N);
1605 end loop;
1606
1607 Print_Node (N, "", ' ');
1608 Print_Eol;
1609 end if;
1610 end Print_Tree_List;
1611
1612 ---------------------
1613 -- Print_Tree_Node --
1614 ---------------------
1615
1616 procedure Print_Tree_Node (N : Node_Id; Label : String := "") is
1617 begin
1618 Printing_Descendants := False;
1619 Phase := Printing;
1620 Print_Node (N, Label, ' ');
1621 end Print_Tree_Node;
1622
1623 --------
1624 -- pt --
1625 --------
1626
1627 procedure pt (N : Union_Id) is
1628 begin
1629 case N is
1630 when List_Low_Bound .. List_High_Bound - 1 =>
1631 Print_List_Subtree (List_Id (N));
1632 when Node_Range =>
1633 Print_Node_Subtree (Node_Id (N));
1634 when Elist_Range =>
1635 Print_Elist_Subtree (Elist_Id (N));
1636 when others =>
1637 pp (N);
1638 end case;
1639 end pt;
1640
1641 -------------------
1642 -- Serial_Number --
1643 -------------------
1644
1645 -- The hashing algorithm is to use the remainder of the ID value divided
1646 -- by the hash table length as the starting point in the table, and then
1647 -- handle collisions by serial searching wrapping at the end of the table.
1648
1649 Hash_Slot : Nat;
1650 -- Set by an unsuccessful call to Serial_Number (one which returns zero)
1651 -- to save the slot that should be used if Set_Serial_Number is called.
1652
1653 function Serial_Number (Id : Int) return Nat is
1654 H : Int := Id mod Hash_Table_Len;
1655
1656 begin
1657 while Hash_Table (H).Serial /= 0 loop
1658
1659 if Id = Hash_Table (H).Id then
1660 return Hash_Table (H).Serial;
1661 end if;
1662
1663 H := H + 1;
1664
1665 if H > Hash_Table'Last then
1666 H := 0;
1667 end if;
1668 end loop;
1669
1670 -- Entry was not found, save slot number for possible subsequent call
1671 -- to Set_Serial_Number, and unconditionally save the Id in this slot
1672 -- in case of such a call (the Id field is never read if the serial
1673 -- number of the slot is zero, so this is harmless in the case where
1674 -- Set_Serial_Number is not subsequently called).
1675
1676 Hash_Slot := H;
1677 Hash_Table (H).Id := Id;
1678 return 0;
1679
1680 end Serial_Number;
1681
1682 -----------------------
1683 -- Set_Serial_Number --
1684 -----------------------
1685
1686 procedure Set_Serial_Number is
1687 begin
1688 Hash_Table (Hash_Slot).Serial := Next_Serial_Number;
1689 Next_Serial_Number := Next_Serial_Number + 1;
1690 end Set_Serial_Number;
1691
1692 ---------------
1693 -- Tree_Dump --
1694 ---------------
1695
1696 procedure Tree_Dump is
1697 procedure Underline;
1698 -- Put underline under string we just printed
1699
1700 procedure Underline is
1701 Col : constant Int := Column;
1702
1703 begin
1704 Write_Eol;
1705
1706 while Col > Column loop
1707 Write_Char ('-');
1708 end loop;
1709
1710 Write_Eol;
1711 end Underline;
1712
1713 -- Start of processing for Tree_Dump. Note that we turn off the tree dump
1714 -- flags immediately, before starting the dump. This avoids generating two
1715 -- copies of the dump if an abort occurs after printing the dump, and more
1716 -- importantly, avoids an infinite loop if an abort occurs during the dump.
1717
1718 -- Note: unlike in the source print case (in Sprint), we do not output
1719 -- separate trees for each unit. Instead the -df debug switch causes the
1720 -- tree that is output from the main unit to trace references into other
1721 -- units (normally such references are not traced). Since all other units
1722 -- are linked to the main unit by at least one reference, this causes all
1723 -- tree nodes to be included in the output tree.
1724
1725 begin
1726 if Debug_Flag_Y then
1727 Debug_Flag_Y := False;
1728 Write_Eol;
1729 Write_Str ("Tree created for Standard (spec) ");
1730 Underline;
1731 Print_Node_Subtree (Standard_Package_Node);
1732 Write_Eol;
1733 end if;
1734
1735 if Debug_Flag_T then
1736 Debug_Flag_T := False;
1737
1738 Write_Eol;
1739 Write_Str ("Tree created for ");
1740 Write_Unit_Name (Unit_Name (Main_Unit));
1741 Underline;
1742 Print_Node_Subtree (Cunit (Main_Unit));
1743 Write_Eol;
1744 end if;
1745 end Tree_Dump;
1746
1747 -----------------
1748 -- Visit_Elist --
1749 -----------------
1750
1751 procedure Visit_Elist (E : Elist_Id; Prefix_Str : String) is
1752 M : Elmt_Id;
1753 N : Node_Id;
1754 S : constant Nat := Serial_Number (Int (E));
1755
1756 begin
1757 -- In marking phase, return if already marked, otherwise set next
1758 -- serial number in hash table for later reference.
1759
1760 if Phase = Marking then
1761 if S /= 0 then
1762 return; -- already visited
1763 else
1764 Set_Serial_Number;
1765 end if;
1766
1767 -- In printing phase, if already printed, then return, otherwise we
1768 -- are printing the next item, so increment the serial number.
1769
1770 else
1771 if S < Next_Serial_Number then
1772 return; -- already printed
1773 else
1774 Next_Serial_Number := Next_Serial_Number + 1;
1775 end if;
1776 end if;
1777
1778 -- Now process the list (Print calls have no effect in marking phase)
1779
1780 Print_Str (Prefix_Str);
1781 Print_Elist_Ref (E);
1782 Print_Eol;
1783
1784 if Is_Empty_Elmt_List (E) then
1785 Print_Str (Prefix_Str);
1786 Print_Str ("(Empty element list)");
1787 Print_Eol;
1788 Print_Eol;
1789
1790 else
1791 if Phase = Printing then
1792 M := First_Elmt (E);
1793 while Present (M) loop
1794 N := Node (M);
1795 Print_Str (Prefix_Str);
1796 Print_Str (" ");
1797 Print_Node_Ref (N);
1798 Print_Eol;
1799 Next_Elmt (M);
1800 end loop;
1801
1802 Print_Str (Prefix_Str);
1803 Print_Eol;
1804 end if;
1805
1806 M := First_Elmt (E);
1807 while Present (M) loop
1808 Visit_Node (Node (M), Prefix_Str, ' ');
1809 Next_Elmt (M);
1810 end loop;
1811 end if;
1812 end Visit_Elist;
1813
1814 ----------------
1815 -- Visit_List --
1816 ----------------
1817
1818 procedure Visit_List (L : List_Id; Prefix_Str : String) is
1819 N : Node_Id;
1820 S : constant Nat := Serial_Number (Int (L));
1821
1822 begin
1823 -- In marking phase, return if already marked, otherwise set next
1824 -- serial number in hash table for later reference.
1825
1826 if Phase = Marking then
1827 if S /= 0 then
1828 return;
1829 else
1830 Set_Serial_Number;
1831 end if;
1832
1833 -- In printing phase, if already printed, then return, otherwise we
1834 -- are printing the next item, so increment the serial number.
1835
1836 else
1837 if S < Next_Serial_Number then
1838 return; -- already printed
1839 else
1840 Next_Serial_Number := Next_Serial_Number + 1;
1841 end if;
1842 end if;
1843
1844 -- Now process the list (Print calls have no effect in marking phase)
1845
1846 Print_Str (Prefix_Str);
1847 Print_List_Ref (L);
1848 Print_Eol;
1849
1850 Print_Str (Prefix_Str);
1851 Print_Str ("|Parent = ");
1852 Print_Node_Ref (Parent (L));
1853 Print_Eol;
1854
1855 N := First (L);
1856
1857 if N = Empty then
1858 Print_Str (Prefix_Str);
1859 Print_Str ("(Empty list)");
1860 Print_Eol;
1861 Print_Eol;
1862
1863 else
1864 Print_Str (Prefix_Str);
1865 Print_Char ('|');
1866 Print_Eol;
1867
1868 while Next (N) /= Empty loop
1869 Visit_Node (N, Prefix_Str, '|');
1870 Next (N);
1871 end loop;
1872 end if;
1873
1874 Visit_Node (N, Prefix_Str, ' ');
1875 end Visit_List;
1876
1877 ----------------
1878 -- Visit_Node --
1879 ----------------
1880
1881 procedure Visit_Node
1882 (N : Node_Id;
1883 Prefix_Str : String;
1884 Prefix_Char : Character)
1885 is
1886 New_Prefix : String (Prefix_Str'First .. Prefix_Str'Last + 2);
1887 -- Prefix string for printing referenced fields
1888
1889 procedure Visit_Descendent
1890 (D : Union_Id;
1891 No_Indent : Boolean := False);
1892 -- This procedure tests the given value of one of the Fields referenced
1893 -- by the current node to determine whether to visit it recursively.
1894 -- Normally No_Indent is false, which means that the visited node will
1895 -- be indented using New_Prefix. If No_Indent is set to True, then
1896 -- this indentation is skipped, and Prefix_Str is used for the call
1897 -- to print the descendent. No_Indent is effective only if the
1898 -- referenced descendent is a node.
1899
1900 ----------------------
1901 -- Visit_Descendent --
1902 ----------------------
1903
1904 procedure Visit_Descendent
1905 (D : Union_Id;
1906 No_Indent : Boolean := False)
1907 is
1908 begin
1909 -- Case of descendent is a node
1910
1911 if D in Node_Range then
1912
1913 -- Don't bother about Empty or Error descendents
1914
1915 if D <= Union_Id (Empty_Or_Error) then
1916 return;
1917 end if;
1918
1919 declare
1920 Nod : constant Node_Or_Entity_Id := Node_Or_Entity_Id (D);
1921
1922 begin
1923 -- Descendents in one of the standardly compiled internal
1924 -- packages are normally ignored, unless the parent is also
1925 -- in such a package (happens when Standard itself is output)
1926 -- or if the -df switch is set which causes all links to be
1927 -- followed, even into package standard.
1928
1929 if Sloc (Nod) <= Standard_Location then
1930 if Sloc (N) > Standard_Location
1931 and then not Debug_Flag_F
1932 then
1933 return;
1934 end if;
1935
1936 -- Don't bother about a descendent in a different unit than
1937 -- the node we came from unless the -df switch is set. Note
1938 -- that we know at this point that Sloc (D) > Standard_Location
1939
1940 -- Note: the tests for No_Location here just make sure that we
1941 -- don't blow up on a node which is missing an Sloc value. This
1942 -- should not normally happen.
1943
1944 else
1945 if (Sloc (N) <= Standard_Location
1946 or else Sloc (N) = No_Location
1947 or else Sloc (Nod) = No_Location
1948 or else not In_Same_Source_Unit (Nod, N))
1949 and then not Debug_Flag_F
1950 then
1951 return;
1952 end if;
1953 end if;
1954
1955 -- Don't bother visiting a source node that has a parent which
1956 -- is not the node we came from. We prefer to trace such nodes
1957 -- from their real parents. This causes the tree to be printed
1958 -- in a more coherent order, e.g. a defining identifier listed
1959 -- next to its corresponding declaration, instead of next to
1960 -- some semantic reference.
1961
1962 -- This test is skipped for nodes in standard packages unless
1963 -- the -dy option is set (which outputs the tree for standard)
1964
1965 -- Also, always follow pointers to Is_Itype entities,
1966 -- since we want to list these when they are first referenced.
1967
1968 if Parent (Nod) /= Empty
1969 and then Comes_From_Source (Nod)
1970 and then Parent (Nod) /= N
1971 and then (Sloc (N) > Standard_Location or else Debug_Flag_Y)
1972 then
1973 return;
1974 end if;
1975
1976 -- If we successfully fall through all the above tests (which
1977 -- execute a return if the node is not to be visited), we can
1978 -- go ahead and visit the node.
1979
1980 if No_Indent then
1981 Visit_Node (Nod, Prefix_Str, Prefix_Char);
1982 else
1983 Visit_Node (Nod, New_Prefix, ' ');
1984 end if;
1985 end;
1986
1987 -- Case of descendent is a list
1988
1989 elsif D in List_Range then
1990
1991 -- Don't bother with a missing list, empty list or error list
1992
1993 if D = Union_Id (No_List)
1994 or else D = Union_Id (Error_List)
1995 or else Is_Empty_List (List_Id (D))
1996 then
1997 return;
1998
1999 -- Otherwise we can visit the list. Note that we don't bother to
2000 -- do the parent test that we did for the node case, because it
2001 -- just does not happen that lists are referenced more than one
2002 -- place in the tree. We aren't counting on this being the case
2003 -- to generate valid output, it is just that we don't need in
2004 -- practice to worry about listing the list at a place that is
2005 -- inconvenient.
2006
2007 else
2008 Visit_List (List_Id (D), New_Prefix);
2009 end if;
2010
2011 -- Case of descendent is an element list
2012
2013 elsif D in Elist_Range then
2014
2015 -- Don't bother with a missing list, or an empty list
2016
2017 if D = Union_Id (No_Elist)
2018 or else Is_Empty_Elmt_List (Elist_Id (D))
2019 then
2020 return;
2021
2022 -- Otherwise, visit the referenced element list
2023
2024 else
2025 Visit_Elist (Elist_Id (D), New_Prefix);
2026 end if;
2027
2028 -- For all other kinds of descendents (strings, names, uints etc),
2029 -- there is nothing to visit (the contents of the field will be
2030 -- printed when we print the containing node, but what concerns
2031 -- us now is looking for descendents in the tree.
2032
2033 else
2034 null;
2035 end if;
2036 end Visit_Descendent;
2037
2038 -- Start of processing for Visit_Node
2039
2040 begin
2041 if N = Empty then
2042 return;
2043 end if;
2044
2045 -- Set fatal error node in case we get a blow up during the trace
2046
2047 Current_Error_Node := N;
2048
2049 New_Prefix (Prefix_Str'Range) := Prefix_Str;
2050 New_Prefix (Prefix_Str'Last + 1) := Prefix_Char;
2051 New_Prefix (Prefix_Str'Last + 2) := ' ';
2052
2053 -- In the marking phase, all we do is to set the serial number
2054
2055 if Phase = Marking then
2056 if Serial_Number (Int (N)) /= 0 then
2057 return; -- already visited
2058 else
2059 Set_Serial_Number;
2060 end if;
2061
2062 -- In the printing phase, we print the node
2063
2064 else
2065 if Serial_Number (Int (N)) < Next_Serial_Number then
2066
2067 -- Here we have already visited the node, but if it is in a list,
2068 -- we still want to print the reference, so that it is clear that
2069 -- it belongs to the list.
2070
2071 if Is_List_Member (N) then
2072 Print_Str (Prefix_Str);
2073 Print_Node_Ref (N);
2074 Print_Eol;
2075 Print_Str (Prefix_Str);
2076 Print_Char (Prefix_Char);
2077 Print_Str ("(already output)");
2078 Print_Eol;
2079 Print_Str (Prefix_Str);
2080 Print_Char (Prefix_Char);
2081 Print_Eol;
2082 end if;
2083
2084 return;
2085
2086 else
2087 Print_Node (N, Prefix_Str, Prefix_Char);
2088 Print_Str (Prefix_Str);
2089 Print_Char (Prefix_Char);
2090 Print_Eol;
2091 Next_Serial_Number := Next_Serial_Number + 1;
2092 end if;
2093 end if;
2094
2095 -- Visit all descendents of this node
2096
2097 if Nkind (N) not in N_Entity then
2098 Visit_Descendent (Field1 (N));
2099 Visit_Descendent (Field2 (N));
2100 Visit_Descendent (Field3 (N));
2101 Visit_Descendent (Field4 (N));
2102 Visit_Descendent (Field5 (N));
2103
2104 if Has_Aspects (N) then
2105 Visit_Descendent (Union_Id (Aspect_Specifications (N)));
2106 end if;
2107
2108 -- Entity case
2109
2110 else
2111 Visit_Descendent (Field1 (N));
2112 Visit_Descendent (Field3 (N));
2113 Visit_Descendent (Field4 (N));
2114 Visit_Descendent (Field5 (N));
2115 Visit_Descendent (Field6 (N));
2116 Visit_Descendent (Field7 (N));
2117 Visit_Descendent (Field8 (N));
2118 Visit_Descendent (Field9 (N));
2119 Visit_Descendent (Field10 (N));
2120 Visit_Descendent (Field11 (N));
2121 Visit_Descendent (Field12 (N));
2122 Visit_Descendent (Field13 (N));
2123 Visit_Descendent (Field14 (N));
2124 Visit_Descendent (Field15 (N));
2125 Visit_Descendent (Field16 (N));
2126 Visit_Descendent (Field17 (N));
2127 Visit_Descendent (Field18 (N));
2128 Visit_Descendent (Field19 (N));
2129 Visit_Descendent (Field20 (N));
2130 Visit_Descendent (Field21 (N));
2131 Visit_Descendent (Field22 (N));
2132 Visit_Descendent (Field23 (N));
2133
2134 -- Now an interesting special case. Normally parents are always
2135 -- printed since we traverse the tree in a downwards direction.
2136 -- However, there is an exception to this rule, which is the
2137 -- case where a parent is constructed by the compiler and is not
2138 -- referenced elsewhere in the tree. The following catches this case.
2139
2140 if not Comes_From_Source (N) then
2141 Visit_Descendent (Union_Id (Parent (N)));
2142 end if;
2143
2144 -- You may be wondering why we omitted Field2 above. The answer
2145 -- is that this is the Next_Entity field, and we want to treat
2146 -- it rather specially. Why? Because a Next_Entity link does not
2147 -- correspond to a level deeper in the tree, and we do not want
2148 -- the tree to march off to the right of the page due to bogus
2149 -- indentations coming from this effect.
2150
2151 -- To prevent this, what we do is to control references via
2152 -- Next_Entity only from the first entity on a given scope chain,
2153 -- and we keep them all at the same level. Of course if an entity
2154 -- has already been referenced it is not printed.
2155
2156 if Present (Next_Entity (N))
2157 and then Present (Scope (N))
2158 and then First_Entity (Scope (N)) = N
2159 then
2160 declare
2161 Nod : Node_Id;
2162
2163 begin
2164 Nod := N;
2165 while Present (Nod) loop
2166 Visit_Descendent (Union_Id (Next_Entity (Nod)));
2167 Nod := Next_Entity (Nod);
2168 end loop;
2169 end;
2170 end if;
2171 end if;
2172 end Visit_Node;
2173
2174 end Treepr;
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