summaryrefslogtreecommitdiffstats
path: root/gcc/f/storag.c
blob: db3382725f9530904e3056231007d04adb47e420 (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
/* storag.c -- Implementation File (module.c template V1.0)
   Copyright (C) 1995, 1996, 2003 Free Software Foundation, Inc.
   Contributed by James Craig Burley.

This file is part of GNU Fortran.

GNU Fortran is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Fortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Fortran; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.

   Related Modules:
      None

   Description:
      Maintains information on storage (memory) relationships between
      COMMON, dummy, and local variables, plus their equivalences (dummies
      don't have equivalences, however).

   Modifications:
*/

/* Include files. */

#include "proj.h"
#include "storag.h"
#include "data.h"
#include "malloc.h"
#include "symbol.h"
#include "target.h"

/* Externals defined here. */

ffestoragList_ ffestorag_list_;

/* Simple definitions and enumerations. */


/* Internal typedefs. */


/* Private include files. */


/* Internal structure definitions. */


/* Static objects accessed by functions in this module. */

static ffetargetOffset ffestorag_local_size_;	/* #units allocated so far. */
static bool ffestorag_reported_;/* Reports happen only once. */

/* Static functions (internal). */


/* Internal macros. */

#define ffestorag_next_(s) ((s)->next)
#define ffestorag_previous_(s) ((s)->previous)

/* ffestorag_drive -- Drive fn from list of storage objects

   ffestoragList sl;
   void (*fn)(ffestorag mst,ffestorag st);
   ffestorag mst;  // the master ffestorag object (or whatever)
   ffestorag_drive(sl,fn,mst);

   Calls (*fn)(mst,st) for every st in the list sl.  */

void
ffestorag_drive (ffestoragList sl, void (*fn) (ffestorag mst, ffestorag st),
		 ffestorag mst)
{
  ffestorag st;

  for (st = sl->first;
       st != (ffestorag) &sl->first;
       st = st->next)
    (*fn) (mst, st);
}

/* ffestorag_dump -- Dump information on storage object

   ffestorag s;	 // the ffestorag object
   ffestorag_dump(s);

   Dumps information in the storage object.  */

void
ffestorag_dump (ffestorag s)
{
  if (s == NULL)
    {
      fprintf (dmpout, "(no storage object)");
      return;
    }

  switch (s->type)
    {
    case FFESTORAG_typeCBLOCK:
      fprintf (dmpout, "CBLOCK ");
      break;

    case FFESTORAG_typeCOMMON:
      fprintf (dmpout, "COMMON ");
      break;

    case FFESTORAG_typeLOCAL:
      fprintf (dmpout, "LOCAL ");
      break;

    case FFESTORAG_typeEQUIV:
      fprintf (dmpout, "EQUIV ");
      break;

    default:
      fprintf (dmpout, "?%d? ", s->type);
      break;
    }

  if (s->symbol != NULL)
    fprintf (dmpout, "\"%s\" ", ffesymbol_text (s->symbol));

  fprintf (dmpout, "at %" ffetargetOffset_f "d size %" ffetargetOffset_f
	   "d, align loc%%%"
	   ffetargetAlign_f "u=%" ffetargetAlign_f "u, bt=%s, kt=%s",
	   s->offset,
	   s->size, (unsigned int) s->alignment, (unsigned int) s->modulo,
	   ffeinfo_basictype_string (s->basic_type),
	   ffeinfo_kindtype_string (s->kind_type));

  if (s->equivs_.first != (ffestorag) &s->equivs_.first)
    {
      ffestorag sq;

      fprintf (dmpout, " with equivs");
      for (sq = s->equivs_.first;
	   sq != (ffestorag) &s->equivs_.first;
	   sq = ffestorag_next_ (sq))
	{
	  if (ffestorag_previous_ (sq) == (ffestorag) &s->equivs_.first)
	    fputc (' ', dmpout);
	  else
	    fputc (',', dmpout);
	  fprintf (dmpout, "%s", ffesymbol_text (ffestorag_symbol (sq)));
	}
    }
}

/* ffestorag_init_2 -- Initialize for new program unit

   ffestorag_init_2();	*/

void
ffestorag_init_2 (void)
{
  ffestorag_list_.first = ffestorag_list_.last
  = (ffestorag) &ffestorag_list_.first;
  ffestorag_local_size_ = 0;
  ffestorag_reported_ = FALSE;
}

/* ffestorag_end_layout -- Do final layout for symbol

   ffesymbol s;
   ffestorag_end_layout(s);  */

void
ffestorag_end_layout (ffesymbol s)
{
  if (ffesymbol_storage (s) != NULL)
    return;			/* Already laid out. */

  ffestorag_exec_layout (s);	/* Do what we have in common. */
#if 0
  assert (ffesymbol_storage (s) == NULL);	/* I'd like to know what
						   cases miss going through
						   ffecom_sym_learned, and
						   why; I don't think we
						   should have to do the
						   exec_layout thing at all
						   here. */
  /* Now I think I know: we have to do exec_layout here, because equivalence
     handling could encounter an error that takes a variable off of its
     equivalence object (and vice versa), and we should then layout the var
     as a local entity. */
#endif
}

/* ffestorag_exec_layout -- Do initial layout for symbol

   ffesymbol s;
   ffestorag_exec_layout(s);  */

void
ffestorag_exec_layout (ffesymbol s)
{
  ffetargetAlign alignment;
  ffetargetAlign modulo;
  ffetargetOffset size;
  ffetargetOffset num_elements;
  ffetargetAlign pad;
  ffestorag st;
  ffestorag stv;
  ffebld list;
  ffebld item;
  ffesymbol var;
  bool init;

  if (ffesymbol_storage (s) != NULL)
    return;			/* Already laid out. */

  switch (ffesymbol_kind (s))
    {
    default:
      return;			/* Do nothing. */

    case FFEINFO_kindENTITY:
      switch (ffesymbol_where (s))
	{
	case FFEINFO_whereLOCAL:
	  if (ffesymbol_equiv (s) != NULL)
	    return;		/* Let ffeequiv handle this guy. */
	  if (ffesymbol_rank (s) == 0)
	    num_elements = 1;
	  else
	    {
	      if (ffebld_op (ffesymbol_arraysize (s))
		  != FFEBLD_opCONTER)
		return;	/* An adjustable local array, just like a dummy. */
	      num_elements
		= ffebld_constant_integerdefault (ffebld_conter
						  (ffesymbol_arraysize (s)));
	    }
	  ffetarget_layout (ffesymbol_text (s), &alignment, &modulo,
			    &size, ffesymbol_basictype (s),
			    ffesymbol_kindtype (s), ffesymbol_size (s),
			    num_elements);
	  st = ffestorag_new (ffestorag_list_master ());
	  st->parent = NULL;	/* Initializations happen at sym level. */
	  st->init = NULL;
	  st->accretion = NULL;
	  st->symbol = s;
	  st->size = size;
	  st->offset = 0;
	  st->alignment = alignment;
	  st->modulo = modulo;
	  st->type = FFESTORAG_typeLOCAL;
	  st->basic_type = ffesymbol_basictype (s);
	  st->kind_type = ffesymbol_kindtype (s);
	  st->type_symbol = s;
	  st->is_save = ffesymbol_is_save (s);
	  st->is_init = ffesymbol_is_init (s);
	  ffesymbol_set_storage (s, st);
	  if (ffesymbol_is_init (s))
	    ffecom_notify_init_symbol (s);	/* Init completed before, but
						   we didn't have a storage
						   object for it; maybe back
						   end wants to see the sym
						   again now. */
	  ffesymbol_signal_unreported (s);
	  return;

	case FFEINFO_whereCOMMON:
	  return;		/* Allocate storage for entire common block
				   at once. */

	case FFEINFO_whereDUMMY:
	  return;		/* Don't do anything about dummies for now. */

	case FFEINFO_whereRESULT:
	case FFEINFO_whereIMMEDIATE:
	case FFEINFO_whereCONSTANT:
	case FFEINFO_whereNONE:
	  return;		/* These don't get storage (esp. NONE, which
				   is UNCERTAIN). */

	default:
	  assert ("bad ENTITY where" == NULL);
	  return;
	}
      break;

    case FFEINFO_kindCOMMON:
      assert (ffesymbol_where (s) == FFEINFO_whereLOCAL);
      st = ffestorag_new (ffestorag_list_master ());
      st->parent = NULL;	/* Initializations happen here. */
      st->init = NULL;
      st->accretion = NULL;
      st->symbol = s;
      st->size = 0;
      st->offset = 0;
      st->alignment = 1;
      st->modulo = 0;
      st->type = FFESTORAG_typeCBLOCK;
      if (ffesymbol_commonlist (s) != NULL)
	{
	  var = ffebld_symter (ffebld_head (ffesymbol_commonlist (s)));
	  st->basic_type = ffesymbol_basictype (var);
	  st->kind_type = ffesymbol_kindtype (var);
	  st->type_symbol = var;
	}
      else
	{			/* Special case for empty common area:
				   NONE/NONE means nothing. */
	  st->basic_type = FFEINFO_basictypeNONE;
	  st->kind_type = FFEINFO_kindtypeNONE;
	  st->type_symbol = NULL;
	}
      st->is_save = ffesymbol_is_save (s);
      st->is_init = ffesymbol_is_init (s);
      if (!ffe_is_mainprog ())
	ffeglobal_save_common (s,
			       st->is_save || ffe_is_saveall (),
			       ffesymbol_where_line (s),
			       ffesymbol_where_column (s));
      ffesymbol_set_storage (s, st);

      init = FALSE;
      for (list = ffesymbol_commonlist (s);
	   list != NULL;
	   list = ffebld_trail (list))
	{
	  item = ffebld_head (list);
	  assert (ffebld_op (item) == FFEBLD_opSYMTER);
	  var = ffebld_symter (item);
	  if (ffesymbol_basictype (var) == FFEINFO_basictypeANY)
	    continue;		/* Ignore any symbols that have errors. */
	  if (ffesymbol_rank (var) == 0)
	    num_elements = 1;
	  else
	    num_elements = ffebld_constant_integerdefault (ffebld_conter
					       (ffesymbol_arraysize (var)));
	  ffetarget_layout (ffesymbol_text (var), &alignment, &modulo,
			    &size, ffesymbol_basictype (var),
			    ffesymbol_kindtype (var), ffesymbol_size (var),
			    num_elements);
	  pad = ffetarget_align (&st->alignment, &st->modulo, st->size,
				 alignment, modulo);
	  if (pad != 0)
	    {			/* Warn about padding in the midst of a
				   common area. */
	      char padding[20];

	      sprintf (&padding[0], "%" ffetargetAlign_f "u", pad);
	      ffebad_start (FFEBAD_COMMON_PAD);
	      ffebad_string (padding);
	      ffebad_string (ffesymbol_text (var));
	      ffebad_string (ffesymbol_text (s));
	      ffebad_string ((pad == 1)
			     ? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
	      ffebad_here (0, ffesymbol_where_line (s), ffesymbol_where_column (s));
	      ffebad_finish ();
	    }
	  stv = ffestorag_new (ffestorag_list_master ());
	  stv->parent = st;	/* Initializations happen in COMMON block. */
	  stv->init = NULL;
	  stv->accretion = NULL;
	  stv->symbol = var;
	  stv->size = size;
	  if (!ffetarget_offset_add (&stv->offset, st->size, pad))
	    {			/* Common block size plus pad, complain if
				   overflow. */
	      ffetarget_offset_overflow (ffesymbol_text (s));
	    }
	  if (!ffetarget_offset_add (&st->size, stv->offset, stv->size))
	    {			/* Adjust size of common block, complain if
				   overflow. */
	      ffetarget_offset_overflow (ffesymbol_text (s));
	    }
	  stv->alignment = alignment;
	  stv->modulo = modulo;
	  stv->type = FFESTORAG_typeCOMMON;
	  stv->basic_type = ffesymbol_basictype (var);
	  stv->kind_type = ffesymbol_kindtype (var);
	  stv->type_symbol = var;
	  stv->is_save = st->is_save;
	  stv->is_init = st->is_init;
	  ffesymbol_set_storage (var, stv);
	  ffesymbol_signal_unreported (var);
	  ffestorag_update (st, var, ffesymbol_basictype (var),
			    ffesymbol_kindtype (var));
	  if (ffesymbol_is_init (var))
	    init = TRUE;	/* Must move inits over to COMMON's
				   ffestorag. */
	}
      if (ffeequiv_layout_cblock (st))
	init = TRUE;
      ffeglobal_pad_common (s, st->modulo, ffesymbol_where_line (s),
			    ffesymbol_where_column (s));
      if (init)
	ffedata_gather (st);	/* Gather subordinate inits into one init. */
      ffesymbol_signal_unreported (s);
      return;
    }
}

/* ffestorag_new -- Create new ffestorag object, append to list

   ffestorag s;
   ffestoragList sl;
   s = ffestorag_new(sl);  */

ffestorag
ffestorag_new (ffestoragList sl)
{
  ffestorag s;

  s = (ffestorag) malloc_new_kp (ffe_pool_program_unit (), "ffestorag",
				 sizeof (*s));
  s->next = (ffestorag) &sl->first;
  s->previous = sl->last;
  s->hook = FFECOM_storageNULL;
  s->previous->next = s;
  sl->last = s;
  s->equivs_.first = s->equivs_.last = (ffestorag) &s->equivs_.first;

  return s;
}

/* Report info on LOCAL non-sym-assoc'ed entities if needed.  */

void
ffestorag_report (void)
{
  ffestorag s;

  if (ffestorag_reported_)
    return;

  for (s = ffestorag_list_.first;
       s != (ffestorag) &ffestorag_list_.first;
       s = s->next)
    {
      if (s->symbol == NULL)
	{
	  ffestorag_reported_ = TRUE;
	  fputs ("Storage area: ", dmpout);
	  ffestorag_dump (s);
	  fputc ('\n', dmpout);
	}
    }
}

/* ffestorag_update -- Update type info for ffestorag object

   ffestorag s;	 // existing object
   ffeinfoBasictype bt;	 // basic type for newly added member of object
   ffeinfoKindtype kt;	// kind type for it
   ffestorag_update(s,bt,kt);

   If the existing type for the storage object agrees with the new type
   info, just returns.	If the basic types agree but not the kind types,
   sets the kind type for the object to NONE.  If the basic types
   disagree, sets the kind type to NONE, and the basic type to NONE if the
   basic types both are not CHARACTER, otherwise to ANY.  If the basic
   type for the object already is NONE, it is set to ANY if the new basic
   type is CHARACTER.  Any time a transition is made to ANY and pedantic
   mode is on, a message is issued that mixing CHARACTER and non-CHARACTER
   stuff in the same COMMON/EQUIVALENCE is invalid.  */

void
ffestorag_update (ffestorag s, ffesymbol sym, ffeinfoBasictype bt,
		  ffeinfoKindtype kt)
{
  if (s->basic_type == bt)
    {
      if (s->kind_type == kt)
	return;
      s->kind_type = FFEINFO_kindtypeNONE;
      return;
    }

  switch (s->basic_type)
    {
    case FFEINFO_basictypeANY:
      return;			/* No need to do anything further. */

    case FFEINFO_basictypeCHARACTER:
    any:			/* :::::::::::::::::::: */
      s->basic_type = FFEINFO_basictypeANY;
      s->kind_type = FFEINFO_kindtypeANY;
      if (ffe_is_pedantic ())
	{
	  ffebad_start (FFEBAD_MIXED_TYPES);
	  ffebad_string (ffesymbol_text (s->type_symbol));
	  ffebad_string (ffesymbol_text (sym));
	  ffebad_finish ();
	}
      return;

    default:
      if (bt == FFEINFO_basictypeCHARACTER)
	goto any;		/* :::::::::::::::::::: */
      s->basic_type = FFEINFO_basictypeNONE;
      s->kind_type = FFEINFO_kindtypeNONE;
      return;
    }
}

/* Update INIT flag for storage object.

   If the INIT flag for the <s> object is already TRUE, return.	 Else,
   set it to TRUE and call ffe*_update_init for all contained objects.	*/

void
ffestorag_update_init (ffestorag s)
{
  ffestorag sq;

  if (s->is_init)
    return;

  s->is_init = TRUE;

  if ((s->symbol != NULL)
      && !ffesymbol_is_init (s->symbol))
    ffesymbol_update_init (s->symbol);

  if (s->parent != NULL)
    ffestorag_update_init (s->parent);

  for (sq = s->equivs_.first;
       sq != (ffestorag) &s->equivs_.first;
       sq = ffestorag_next_ (sq))
    {
      if (!sq->is_init)
	ffestorag_update_init (sq);
    }
}

/* Update SAVE flag for storage object.

   If the SAVE flag for the <s> object is already TRUE, return.	 Else,
   set it to TRUE and call ffe*_update_save for all contained objects.	*/

void
ffestorag_update_save (ffestorag s)
{
  ffestorag sq;

  if (s->is_save)
    return;

  s->is_save = TRUE;

  if ((s->symbol != NULL)
      && !ffesymbol_is_save (s->symbol))
    ffesymbol_update_save (s->symbol);

  if (s->parent != NULL)
    ffestorag_update_save (s->parent);

  for (sq = s->equivs_.first;
       sq != (ffestorag) &s->equivs_.first;
       sq = ffestorag_next_ (sq))
    {
      if (!sq->is_save)
	ffestorag_update_save (sq);
    }
}
OpenPOWER on IntegriCloud