summaryrefslogtreecommitdiff
path: root/gcc/fortran/st.c
blob: f6937b934812a7819957c75a09447b7f0e2f8779 (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
/* Build executable statement trees.
   Copyright (C) 2000-2020 Free Software Foundation, Inc.
   Contributed by Andy Vaught

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 3, 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 COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

/* Executable statements are strung together into a singly linked list
   of code structures.  These structures are later translated into GCC
   GENERIC tree structures and from there to executable code for a
   target.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "gfortran.h"

gfc_code new_st;


/* Zeroes out the new_st structure.  */

void
gfc_clear_new_st (void)
{
  memset (&new_st, '\0', sizeof (new_st));
  new_st.op = EXEC_NOP;
}


/* Get a gfc_code structure, initialized with the current locus
   and a statement code 'op'.  */

gfc_code *
gfc_get_code (gfc_exec_op op)
{
  gfc_code *c;

  c = XCNEW (gfc_code);
  c->op = op;
  c->loc = gfc_current_locus;
  return c;
}


/* Given some part of a gfc_code structure, append a set of code to
   its tail, returning a pointer to the new tail.  */

gfc_code *
gfc_append_code (gfc_code *tail, gfc_code *new_code)
{
  if (tail != NULL)
    {
      while (tail->next != NULL)
	tail = tail->next;

      tail->next = new_code;
    }

  while (new_code->next != NULL)
    new_code = new_code->next;

  return new_code;
}


/* Free a single code structure, but not the actual structure itself.  */

void
gfc_free_statement (gfc_code *p)
{
  if (p->expr1)
    gfc_free_expr (p->expr1);
  if (p->expr2)
    gfc_free_expr (p->expr2);

  switch (p->op)
    {
    case EXEC_NOP:
    case EXEC_END_BLOCK:
    case EXEC_END_NESTED_BLOCK:
    case EXEC_ASSIGN:
    case EXEC_INIT_ASSIGN:
    case EXEC_GOTO:
    case EXEC_CYCLE:
    case EXEC_RETURN:
    case EXEC_END_PROCEDURE:
    case EXEC_IF:
    case EXEC_PAUSE:
    case EXEC_STOP:
    case EXEC_ERROR_STOP:
    case EXEC_EXIT:
    case EXEC_WHERE:
    case EXEC_IOLENGTH:
    case EXEC_POINTER_ASSIGN:
    case EXEC_DO_WHILE:
    case EXEC_CONTINUE:
    case EXEC_TRANSFER:
    case EXEC_LABEL_ASSIGN:
    case EXEC_ENTRY:
    case EXEC_ARITHMETIC_IF:
    case EXEC_CRITICAL:
    case EXEC_SYNC_ALL:
    case EXEC_SYNC_IMAGES:
    case EXEC_SYNC_MEMORY:
    case EXEC_LOCK:
    case EXEC_UNLOCK:
    case EXEC_EVENT_POST:
    case EXEC_EVENT_WAIT:
    case EXEC_FAIL_IMAGE:
    case EXEC_CHANGE_TEAM:
    case EXEC_END_TEAM:
    case EXEC_FORM_TEAM:
    case EXEC_SYNC_TEAM:
      break;

    case EXEC_BLOCK:
      gfc_free_namespace (p->ext.block.ns);
      gfc_free_association_list (p->ext.block.assoc);
      break;

    case EXEC_COMPCALL:
    case EXEC_CALL_PPC:
    case EXEC_CALL:
    case EXEC_ASSIGN_CALL:
      gfc_free_actual_arglist (p->ext.actual);
      break;

    case EXEC_SELECT:
    case EXEC_SELECT_TYPE:
    case EXEC_SELECT_RANK:
      if (p->ext.block.case_list)
	gfc_free_case_list (p->ext.block.case_list);
      break;

    case EXEC_DO:
      gfc_free_iterator (p->ext.iterator, 1);
      break;

    case EXEC_ALLOCATE:
    case EXEC_DEALLOCATE:
      gfc_free_alloc_list (p->ext.alloc.list);
      break;

    case EXEC_OPEN:
      gfc_free_open (p->ext.open);
      break;

    case EXEC_CLOSE:
      gfc_free_close (p->ext.close);
      break;

    case EXEC_BACKSPACE:
    case EXEC_ENDFILE:
    case EXEC_REWIND:
    case EXEC_FLUSH:
      gfc_free_filepos (p->ext.filepos);
      break;

    case EXEC_INQUIRE:
      gfc_free_inquire (p->ext.inquire);
      break;

    case EXEC_WAIT:
      gfc_free_wait (p->ext.wait);
      break;

    case EXEC_READ:
    case EXEC_WRITE:
      gfc_free_dt (p->ext.dt);
      break;

    case EXEC_DT_END:
      /* The ext.dt member is a duplicate pointer and doesn't need to
	 be freed.  */
      break;

    case EXEC_DO_CONCURRENT:
    case EXEC_FORALL:
      gfc_free_forall_iterator (p->ext.forall_iterator);
      break;

    case EXEC_OACC_DECLARE:
      if (p->ext.oacc_declare)
	gfc_free_oacc_declare_clauses (p->ext.oacc_declare);
      break;

    case EXEC_OACC_PARALLEL_LOOP:
    case EXEC_OACC_PARALLEL:
    case EXEC_OACC_KERNELS_LOOP:
    case EXEC_OACC_KERNELS:
    case EXEC_OACC_SERIAL_LOOP:
    case EXEC_OACC_SERIAL:
    case EXEC_OACC_DATA:
    case EXEC_OACC_HOST_DATA:
    case EXEC_OACC_LOOP:
    case EXEC_OACC_UPDATE:
    case EXEC_OACC_WAIT:
    case EXEC_OACC_CACHE:
    case EXEC_OACC_ENTER_DATA:
    case EXEC_OACC_EXIT_DATA:
    case EXEC_OACC_ROUTINE:
    case EXEC_OMP_CANCEL:
    case EXEC_OMP_CANCELLATION_POINT:
    case EXEC_OMP_CRITICAL:
    case EXEC_OMP_DISTRIBUTE:
    case EXEC_OMP_DISTRIBUTE_PARALLEL_DO:
    case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD:
    case EXEC_OMP_DISTRIBUTE_SIMD:
    case EXEC_OMP_DO:
    case EXEC_OMP_DO_SIMD:
    case EXEC_OMP_END_SINGLE:
    case EXEC_OMP_ORDERED:
    case EXEC_OMP_PARALLEL:
    case EXEC_OMP_PARALLEL_DO:
    case EXEC_OMP_PARALLEL_DO_SIMD:
    case EXEC_OMP_PARALLEL_SECTIONS:
    case EXEC_OMP_PARALLEL_WORKSHARE:
    case EXEC_OMP_SECTIONS:
    case EXEC_OMP_SIMD:
    case EXEC_OMP_SINGLE:
    case EXEC_OMP_TARGET:
    case EXEC_OMP_TARGET_DATA:
    case EXEC_OMP_TARGET_ENTER_DATA:
    case EXEC_OMP_TARGET_EXIT_DATA:
    case EXEC_OMP_TARGET_PARALLEL:
    case EXEC_OMP_TARGET_PARALLEL_DO:
    case EXEC_OMP_TARGET_PARALLEL_DO_SIMD:
    case EXEC_OMP_TARGET_SIMD:
    case EXEC_OMP_TARGET_TEAMS:
    case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE:
    case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO:
    case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
    case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD:
    case EXEC_OMP_TARGET_UPDATE:
    case EXEC_OMP_TASK:
    case EXEC_OMP_TASKLOOP:
    case EXEC_OMP_TASKLOOP_SIMD:
    case EXEC_OMP_TEAMS:
    case EXEC_OMP_TEAMS_DISTRIBUTE:
    case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO:
    case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD:
    case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD:
    case EXEC_OMP_WORKSHARE:
      gfc_free_omp_clauses (p->ext.omp_clauses);
      break;

    case EXEC_OMP_END_CRITICAL:
      free (CONST_CAST (char *, p->ext.omp_name));
      break;

    case EXEC_OMP_FLUSH:
      gfc_free_omp_namelist (p->ext.omp_namelist);
      break;

    case EXEC_OACC_ATOMIC:
    case EXEC_OMP_ATOMIC:
    case EXEC_OMP_BARRIER:
    case EXEC_OMP_MASTER:
    case EXEC_OMP_END_NOWAIT:
    case EXEC_OMP_TASKGROUP:
    case EXEC_OMP_TASKWAIT:
    case EXEC_OMP_TASKYIELD:
      break;

    default:
      gfc_internal_error ("gfc_free_statement(): Bad statement");
    }
}


/* Free a code statement and all other code structures linked to it.  */

void
gfc_free_statements (gfc_code *p)
{
  gfc_code *q;

  for (; p; p = q)
    {
      q = p->next;

      if (p->block)
	gfc_free_statements (p->block);
      gfc_free_statement (p);
      free (p);
    }
}


/* Free an association list (of an ASSOCIATE statement).  */

void
gfc_free_association_list (gfc_association_list* assoc)
{
  if (!assoc)
    return;

  gfc_free_association_list (assoc->next);
  free (assoc);
}