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Fortran: Fix bugs and missing features in finalization [PR37336]
[gcc.git] / gcc / fortran / trans-decl.cc
1 /* Backend function setup
2 Copyright (C) 2002-2023 Free Software Foundation, Inc.
3 Contributed by Paul Brook
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
20
21 /* trans-decl.cc -- Handling of backend function and variable decls, etc */
22
23 #include "config.h"
24 #include "system.h"
25 #include "coretypes.h"
26 #include "target.h"
27 #include "function.h"
28 #include "tree.h"
29 #include "gfortran.h"
30 #include "gimple-expr.h" /* For create_tmp_var_raw. */
31 #include "trans.h"
32 #include "stringpool.h"
33 #include "cgraph.h"
34 #include "fold-const.h"
35 #include "stor-layout.h"
36 #include "varasm.h"
37 #include "attribs.h"
38 #include "dumpfile.h"
39 #include "toplev.h" /* For announce_function. */
40 #include "debug.h"
41 #include "constructor.h"
42 #include "trans-types.h"
43 #include "trans-array.h"
44 #include "trans-const.h"
45 /* Only for gfc_trans_code. Shouldn't need to include this. */
46 #include "trans-stmt.h"
47 #include "gomp-constants.h"
48 #include "gimplify.h"
49 #include "omp-general.h"
50 #include "attr-fnspec.h"
51
52 #define MAX_LABEL_VALUE 99999
53
54
55 /* Holds the result of the function if no result variable specified. */
56
57 static GTY(()) tree current_fake_result_decl;
58 static GTY(()) tree parent_fake_result_decl;
59
60
61 /* Holds the variable DECLs for the current function. */
62
63 static GTY(()) tree saved_function_decls;
64 static GTY(()) tree saved_parent_function_decls;
65
66 /* Holds the variable DECLs that are locals. */
67
68 static GTY(()) tree saved_local_decls;
69
70 /* The namespace of the module we're currently generating. Only used while
71 outputting decls for module variables. Do not rely on this being set. */
72
73 static gfc_namespace *module_namespace;
74
75 /* The currently processed procedure symbol. */
76 static gfc_symbol* current_procedure_symbol = NULL;
77
78 /* The currently processed module. */
79 static struct module_htab_entry *cur_module;
80
81 /* With -fcoarray=lib: For generating the registering call
82 of static coarrays. */
83 static bool has_coarray_vars;
84 static stmtblock_t caf_init_block;
85
86
87 /* List of static constructor functions. */
88
89 tree gfc_static_ctors;
90
91
92 /* Whether we've seen a symbol from an IEEE module in the namespace. */
93 static int seen_ieee_symbol;
94
95 /* Function declarations for builtin library functions. */
96
97 tree gfor_fndecl_pause_numeric;
98 tree gfor_fndecl_pause_string;
99 tree gfor_fndecl_stop_numeric;
100 tree gfor_fndecl_stop_string;
101 tree gfor_fndecl_error_stop_numeric;
102 tree gfor_fndecl_error_stop_string;
103 tree gfor_fndecl_runtime_error;
104 tree gfor_fndecl_runtime_error_at;
105 tree gfor_fndecl_runtime_warning_at;
106 tree gfor_fndecl_os_error_at;
107 tree gfor_fndecl_generate_error;
108 tree gfor_fndecl_set_args;
109 tree gfor_fndecl_set_fpe;
110 tree gfor_fndecl_set_options;
111 tree gfor_fndecl_set_convert;
112 tree gfor_fndecl_set_record_marker;
113 tree gfor_fndecl_set_max_subrecord_length;
114 tree gfor_fndecl_ctime;
115 tree gfor_fndecl_fdate;
116 tree gfor_fndecl_ttynam;
117 tree gfor_fndecl_in_pack;
118 tree gfor_fndecl_in_unpack;
119 tree gfor_fndecl_associated;
120 tree gfor_fndecl_system_clock4;
121 tree gfor_fndecl_system_clock8;
122 tree gfor_fndecl_ieee_procedure_entry;
123 tree gfor_fndecl_ieee_procedure_exit;
124
125 /* Coarray run-time library function decls. */
126 tree gfor_fndecl_caf_init;
127 tree gfor_fndecl_caf_finalize;
128 tree gfor_fndecl_caf_this_image;
129 tree gfor_fndecl_caf_num_images;
130 tree gfor_fndecl_caf_register;
131 tree gfor_fndecl_caf_deregister;
132 tree gfor_fndecl_caf_get;
133 tree gfor_fndecl_caf_send;
134 tree gfor_fndecl_caf_sendget;
135 tree gfor_fndecl_caf_get_by_ref;
136 tree gfor_fndecl_caf_send_by_ref;
137 tree gfor_fndecl_caf_sendget_by_ref;
138 tree gfor_fndecl_caf_sync_all;
139 tree gfor_fndecl_caf_sync_memory;
140 tree gfor_fndecl_caf_sync_images;
141 tree gfor_fndecl_caf_stop_str;
142 tree gfor_fndecl_caf_stop_numeric;
143 tree gfor_fndecl_caf_error_stop;
144 tree gfor_fndecl_caf_error_stop_str;
145 tree gfor_fndecl_caf_atomic_def;
146 tree gfor_fndecl_caf_atomic_ref;
147 tree gfor_fndecl_caf_atomic_cas;
148 tree gfor_fndecl_caf_atomic_op;
149 tree gfor_fndecl_caf_lock;
150 tree gfor_fndecl_caf_unlock;
151 tree gfor_fndecl_caf_event_post;
152 tree gfor_fndecl_caf_event_wait;
153 tree gfor_fndecl_caf_event_query;
154 tree gfor_fndecl_caf_fail_image;
155 tree gfor_fndecl_caf_failed_images;
156 tree gfor_fndecl_caf_image_status;
157 tree gfor_fndecl_caf_stopped_images;
158 tree gfor_fndecl_caf_form_team;
159 tree gfor_fndecl_caf_change_team;
160 tree gfor_fndecl_caf_end_team;
161 tree gfor_fndecl_caf_sync_team;
162 tree gfor_fndecl_caf_get_team;
163 tree gfor_fndecl_caf_team_number;
164 tree gfor_fndecl_co_broadcast;
165 tree gfor_fndecl_co_max;
166 tree gfor_fndecl_co_min;
167 tree gfor_fndecl_co_reduce;
168 tree gfor_fndecl_co_sum;
169 tree gfor_fndecl_caf_is_present;
170 tree gfor_fndecl_caf_random_init;
171
172
173 /* Math functions. Many other math functions are handled in
174 trans-intrinsic.cc. */
175
176 gfc_powdecl_list gfor_fndecl_math_powi[4][3];
177 tree gfor_fndecl_math_ishftc4;
178 tree gfor_fndecl_math_ishftc8;
179 tree gfor_fndecl_math_ishftc16;
180
181
182 /* String functions. */
183
184 tree gfor_fndecl_compare_string;
185 tree gfor_fndecl_concat_string;
186 tree gfor_fndecl_string_len_trim;
187 tree gfor_fndecl_string_index;
188 tree gfor_fndecl_string_scan;
189 tree gfor_fndecl_string_verify;
190 tree gfor_fndecl_string_trim;
191 tree gfor_fndecl_string_minmax;
192 tree gfor_fndecl_adjustl;
193 tree gfor_fndecl_adjustr;
194 tree gfor_fndecl_select_string;
195 tree gfor_fndecl_compare_string_char4;
196 tree gfor_fndecl_concat_string_char4;
197 tree gfor_fndecl_string_len_trim_char4;
198 tree gfor_fndecl_string_index_char4;
199 tree gfor_fndecl_string_scan_char4;
200 tree gfor_fndecl_string_verify_char4;
201 tree gfor_fndecl_string_trim_char4;
202 tree gfor_fndecl_string_minmax_char4;
203 tree gfor_fndecl_adjustl_char4;
204 tree gfor_fndecl_adjustr_char4;
205 tree gfor_fndecl_select_string_char4;
206
207
208 /* Conversion between character kinds. */
209 tree gfor_fndecl_convert_char1_to_char4;
210 tree gfor_fndecl_convert_char4_to_char1;
211
212
213 /* Other misc. runtime library functions. */
214 tree gfor_fndecl_iargc;
215 tree gfor_fndecl_kill;
216 tree gfor_fndecl_kill_sub;
217 tree gfor_fndecl_is_contiguous0;
218
219
220 /* Intrinsic functions implemented in Fortran. */
221 tree gfor_fndecl_sc_kind;
222 tree gfor_fndecl_si_kind;
223 tree gfor_fndecl_sr_kind;
224
225 /* BLAS gemm functions. */
226 tree gfor_fndecl_sgemm;
227 tree gfor_fndecl_dgemm;
228 tree gfor_fndecl_cgemm;
229 tree gfor_fndecl_zgemm;
230
231 /* RANDOM_INIT function. */
232 tree gfor_fndecl_random_init; /* libgfortran, 1 image only. */
233
234 static void
235 gfc_add_decl_to_parent_function (tree decl)
236 {
237 gcc_assert (decl);
238 DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl);
239 DECL_NONLOCAL (decl) = 1;
240 DECL_CHAIN (decl) = saved_parent_function_decls;
241 saved_parent_function_decls = decl;
242 }
243
244 void
245 gfc_add_decl_to_function (tree decl)
246 {
247 gcc_assert (decl);
248 TREE_USED (decl) = 1;
249 DECL_CONTEXT (decl) = current_function_decl;
250 DECL_CHAIN (decl) = saved_function_decls;
251 saved_function_decls = decl;
252 }
253
254 static void
255 add_decl_as_local (tree decl)
256 {
257 gcc_assert (decl);
258 TREE_USED (decl) = 1;
259 DECL_CONTEXT (decl) = current_function_decl;
260 DECL_CHAIN (decl) = saved_local_decls;
261 saved_local_decls = decl;
262 }
263
264
265 /* Build a backend label declaration. Set TREE_USED for named labels.
266 The context of the label is always the current_function_decl. All
267 labels are marked artificial. */
268
269 tree
270 gfc_build_label_decl (tree label_id)
271 {
272 /* 2^32 temporaries should be enough. */
273 static unsigned int tmp_num = 1;
274 tree label_decl;
275 char *label_name;
276
277 if (label_id == NULL_TREE)
278 {
279 /* Build an internal label name. */
280 ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++);
281 label_id = get_identifier (label_name);
282 }
283 else
284 label_name = NULL;
285
286 /* Build the LABEL_DECL node. Labels have no type. */
287 label_decl = build_decl (input_location,
288 LABEL_DECL, label_id, void_type_node);
289 DECL_CONTEXT (label_decl) = current_function_decl;
290 SET_DECL_MODE (label_decl, VOIDmode);
291
292 /* We always define the label as used, even if the original source
293 file never references the label. We don't want all kinds of
294 spurious warnings for old-style Fortran code with too many
295 labels. */
296 TREE_USED (label_decl) = 1;
297
298 DECL_ARTIFICIAL (label_decl) = 1;
299 return label_decl;
300 }
301
302
303 /* Set the backend source location of a decl. */
304
305 void
306 gfc_set_decl_location (tree decl, locus * loc)
307 {
308 DECL_SOURCE_LOCATION (decl) = gfc_get_location (loc);
309 }
310
311
312 /* Return the backend label declaration for a given label structure,
313 or create it if it doesn't exist yet. */
314
315 tree
316 gfc_get_label_decl (gfc_st_label * lp)
317 {
318 if (lp->backend_decl)
319 return lp->backend_decl;
320 else
321 {
322 char label_name[GFC_MAX_SYMBOL_LEN + 1];
323 tree label_decl;
324
325 /* Validate the label declaration from the front end. */
326 gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE);
327
328 /* Build a mangled name for the label. */
329 sprintf (label_name, "__label_%.6d", lp->value);
330
331 /* Build the LABEL_DECL node. */
332 label_decl = gfc_build_label_decl (get_identifier (label_name));
333
334 /* Tell the debugger where the label came from. */
335 if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */
336 gfc_set_decl_location (label_decl, &lp->where);
337 else
338 DECL_ARTIFICIAL (label_decl) = 1;
339
340 /* Store the label in the label list and return the LABEL_DECL. */
341 lp->backend_decl = label_decl;
342 return label_decl;
343 }
344 }
345
346 /* Return the name of an identifier. */
347
348 static const char *
349 sym_identifier (gfc_symbol *sym)
350 {
351 if (sym->attr.is_main_program && strcmp (sym->name, "main") == 0)
352 return "MAIN__";
353 else
354 return sym->name;
355 }
356
357 /* Convert a gfc_symbol to an identifier of the same name. */
358
359 static tree
360 gfc_sym_identifier (gfc_symbol * sym)
361 {
362 return get_identifier (sym_identifier (sym));
363 }
364
365 /* Construct mangled name from symbol name. */
366
367 static const char *
368 mangled_identifier (gfc_symbol *sym)
369 {
370 gfc_symbol *proc = sym->ns->proc_name;
371 static char name[3*GFC_MAX_MANGLED_SYMBOL_LEN + 14];
372 /* Prevent the mangling of identifiers that have an assigned
373 binding label (mainly those that are bind(c)). */
374
375 if (sym->attr.is_bind_c == 1 && sym->binding_label)
376 return sym->binding_label;
377
378 if (!sym->fn_result_spec
379 || (sym->module && !(proc && proc->attr.flavor == FL_PROCEDURE)))
380 {
381 if (sym->module == NULL)
382 return sym_identifier (sym);
383 else
384 snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name);
385 }
386 else
387 {
388 /* This is an entity that is actually local to a module procedure
389 that appears in the result specification expression. Since
390 sym->module will be a zero length string, we use ns->proc_name
391 to provide the module name instead. */
392 if (proc && proc->module)
393 snprintf (name, sizeof name, "__%s_MOD__%s_PROC_%s",
394 proc->module, proc->name, sym->name);
395 else
396 snprintf (name, sizeof name, "__%s_PROC_%s",
397 proc->name, sym->name);
398 }
399
400 return name;
401 }
402
403 /* Get mangled identifier, adding the symbol to the global table if
404 it is not yet already there. */
405
406 static tree
407 gfc_sym_mangled_identifier (gfc_symbol * sym)
408 {
409 tree result;
410 gfc_gsymbol *gsym;
411 const char *name;
412
413 name = mangled_identifier (sym);
414 result = get_identifier (name);
415
416 gsym = gfc_find_gsymbol (gfc_gsym_root, name);
417 if (gsym == NULL)
418 {
419 gsym = gfc_get_gsymbol (name, false);
420 gsym->ns = sym->ns;
421 gsym->sym_name = sym->name;
422 }
423
424 return result;
425 }
426
427 /* Construct mangled function name from symbol name. */
428
429 static tree
430 gfc_sym_mangled_function_id (gfc_symbol * sym)
431 {
432 int has_underscore;
433 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
434
435 /* It may be possible to simply use the binding label if it's
436 provided, and remove the other checks. Then we could use it
437 for other things if we wished. */
438 if ((sym->attr.is_bind_c == 1 || sym->attr.is_iso_c == 1) &&
439 sym->binding_label)
440 /* use the binding label rather than the mangled name */
441 return get_identifier (sym->binding_label);
442
443 if ((sym->module == NULL || sym->attr.proc == PROC_EXTERNAL
444 || (sym->module != NULL && (sym->attr.external
445 || sym->attr.if_source == IFSRC_IFBODY)))
446 && !sym->attr.module_procedure)
447 {
448 /* Main program is mangled into MAIN__. */
449 if (sym->attr.is_main_program)
450 return get_identifier ("MAIN__");
451
452 /* Intrinsic procedures are never mangled. */
453 if (sym->attr.proc == PROC_INTRINSIC)
454 return get_identifier (sym->name);
455
456 if (flag_underscoring)
457 {
458 has_underscore = strchr (sym->name, '_') != 0;
459 if (flag_second_underscore && has_underscore)
460 snprintf (name, sizeof name, "%s__", sym->name);
461 else
462 snprintf (name, sizeof name, "%s_", sym->name);
463 return get_identifier (name);
464 }
465 else
466 return get_identifier (sym->name);
467 }
468 else
469 {
470 snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name);
471 return get_identifier (name);
472 }
473 }
474
475
476 void
477 gfc_set_decl_assembler_name (tree decl, tree name)
478 {
479 tree target_mangled = targetm.mangle_decl_assembler_name (decl, name);
480 SET_DECL_ASSEMBLER_NAME (decl, target_mangled);
481 }
482
483
484 /* Returns true if a variable of specified size should go on the stack. */
485
486 int
487 gfc_can_put_var_on_stack (tree size)
488 {
489 unsigned HOST_WIDE_INT low;
490
491 if (!INTEGER_CST_P (size))
492 return 0;
493
494 if (flag_max_stack_var_size < 0)
495 return 1;
496
497 if (!tree_fits_uhwi_p (size))
498 return 0;
499
500 low = TREE_INT_CST_LOW (size);
501 if (low > (unsigned HOST_WIDE_INT) flag_max_stack_var_size)
502 return 0;
503
504 /* TODO: Set a per-function stack size limit. */
505
506 return 1;
507 }
508
509
510 /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to
511 an expression involving its corresponding pointer. There are
512 2 cases; one for variable size arrays, and one for everything else,
513 because variable-sized arrays require one fewer level of
514 indirection. */
515
516 static void
517 gfc_finish_cray_pointee (tree decl, gfc_symbol *sym)
518 {
519 tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer);
520 tree value;
521
522 /* Parameters need to be dereferenced. */
523 if (sym->cp_pointer->attr.dummy)
524 ptr_decl = build_fold_indirect_ref_loc (input_location,
525 ptr_decl);
526
527 /* Check to see if we're dealing with a variable-sized array. */
528 if (sym->attr.dimension
529 && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE)
530 {
531 /* These decls will be dereferenced later, so we don't dereference
532 them here. */
533 value = convert (TREE_TYPE (decl), ptr_decl);
534 }
535 else
536 {
537 ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)),
538 ptr_decl);
539 value = build_fold_indirect_ref_loc (input_location,
540 ptr_decl);
541 }
542
543 SET_DECL_VALUE_EXPR (decl, value);
544 DECL_HAS_VALUE_EXPR_P (decl) = 1;
545 GFC_DECL_CRAY_POINTEE (decl) = 1;
546 }
547
548
549 /* Finish processing of a declaration without an initial value. */
550
551 static void
552 gfc_finish_decl (tree decl)
553 {
554 gcc_assert (TREE_CODE (decl) == PARM_DECL
555 || DECL_INITIAL (decl) == NULL_TREE);
556
557 if (!VAR_P (decl))
558 return;
559
560 if (DECL_SIZE (decl) == NULL_TREE
561 && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE)
562 layout_decl (decl, 0);
563
564 /* A few consistency checks. */
565 /* A static variable with an incomplete type is an error if it is
566 initialized. Also if it is not file scope. Otherwise, let it
567 through, but if it is not `extern' then it may cause an error
568 message later. */
569 /* An automatic variable with an incomplete type is an error. */
570
571 /* We should know the storage size. */
572 gcc_assert (DECL_SIZE (decl) != NULL_TREE
573 || (TREE_STATIC (decl)
574 ? (!DECL_INITIAL (decl) || !DECL_CONTEXT (decl))
575 : DECL_EXTERNAL (decl)));
576
577 /* The storage size should be constant. */
578 gcc_assert ((!DECL_EXTERNAL (decl) && !TREE_STATIC (decl))
579 || !DECL_SIZE (decl)
580 || TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST);
581 }
582
583
584 /* Handle setting of GFC_DECL_SCALAR* on DECL. */
585
586 void
587 gfc_finish_decl_attrs (tree decl, symbol_attribute *attr)
588 {
589 if (!attr->dimension && !attr->codimension)
590 {
591 /* Handle scalar allocatable variables. */
592 if (attr->allocatable)
593 {
594 gfc_allocate_lang_decl (decl);
595 GFC_DECL_SCALAR_ALLOCATABLE (decl) = 1;
596 }
597 /* Handle scalar pointer variables. */
598 if (attr->pointer)
599 {
600 gfc_allocate_lang_decl (decl);
601 GFC_DECL_SCALAR_POINTER (decl) = 1;
602 }
603 if (attr->target)
604 {
605 gfc_allocate_lang_decl (decl);
606 GFC_DECL_SCALAR_TARGET (decl) = 1;
607 }
608 }
609 }
610
611
612 /* Apply symbol attributes to a variable, and add it to the function scope. */
613
614 static void
615 gfc_finish_var_decl (tree decl, gfc_symbol * sym)
616 {
617 tree new_type;
618
619 /* Set DECL_VALUE_EXPR for Cray Pointees. */
620 if (sym->attr.cray_pointee)
621 gfc_finish_cray_pointee (decl, sym);
622
623 /* TREE_ADDRESSABLE means the address of this variable is actually needed.
624 This is the equivalent of the TARGET variables.
625 We also need to set this if the variable is passed by reference in a
626 CALL statement. */
627 if (sym->attr.target)
628 TREE_ADDRESSABLE (decl) = 1;
629
630 /* If it wasn't used we wouldn't be getting it. */
631 TREE_USED (decl) = 1;
632
633 if (sym->attr.flavor == FL_PARAMETER
634 && (sym->attr.dimension || sym->ts.type == BT_DERIVED))
635 TREE_READONLY (decl) = 1;
636
637 /* Chain this decl to the pending declarations. Don't do pushdecl()
638 because this would add them to the current scope rather than the
639 function scope. */
640 if (current_function_decl != NULL_TREE)
641 {
642 if (sym->ns->proc_name
643 && (sym->ns->proc_name->backend_decl == current_function_decl
644 || sym->result == sym))
645 gfc_add_decl_to_function (decl);
646 else if (sym->ns->proc_name
647 && sym->ns->proc_name->attr.flavor == FL_LABEL)
648 /* This is a BLOCK construct. */
649 add_decl_as_local (decl);
650 else if (sym->ns->omp_affinity_iterators)
651 /* This is a block-local iterator. */
652 add_decl_as_local (decl);
653 else
654 gfc_add_decl_to_parent_function (decl);
655 }
656
657 if (sym->attr.cray_pointee)
658 return;
659
660 if(sym->attr.is_bind_c == 1 && sym->binding_label)
661 {
662 /* We need to put variables that are bind(c) into the common
663 segment of the object file, because this is what C would do.
664 gfortran would typically put them in either the BSS or
665 initialized data segments, and only mark them as common if
666 they were part of common blocks. However, if they are not put
667 into common space, then C cannot initialize global Fortran
668 variables that it interoperates with and the draft says that
669 either Fortran or C should be able to initialize it (but not
670 both, of course.) (J3/04-007, section 15.3). */
671 TREE_PUBLIC(decl) = 1;
672 DECL_COMMON(decl) = 1;
673 if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
674 {
675 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
676 DECL_VISIBILITY_SPECIFIED (decl) = true;
677 }
678 }
679
680 /* If a variable is USE associated, it's always external. */
681 if (sym->attr.use_assoc || sym->attr.used_in_submodule)
682 {
683 DECL_EXTERNAL (decl) = 1;
684 TREE_PUBLIC (decl) = 1;
685 }
686 else if (sym->fn_result_spec && !sym->ns->proc_name->module)
687 {
688
689 if (sym->ns->proc_name->attr.if_source != IFSRC_DECL)
690 DECL_EXTERNAL (decl) = 1;
691 else
692 TREE_STATIC (decl) = 1;
693
694 TREE_PUBLIC (decl) = 1;
695 }
696 else if (sym->module && !sym->attr.result && !sym->attr.dummy)
697 {
698 /* TODO: Don't set sym->module for result or dummy variables. */
699 gcc_assert (current_function_decl == NULL_TREE || sym->result == sym);
700
701 TREE_PUBLIC (decl) = 1;
702 TREE_STATIC (decl) = 1;
703 if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
704 {
705 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
706 DECL_VISIBILITY_SPECIFIED (decl) = true;
707 }
708 }
709
710 /* Derived types are a bit peculiar because of the possibility of
711 a default initializer; this must be applied each time the variable
712 comes into scope it therefore need not be static. These variables
713 are SAVE_NONE but have an initializer. Otherwise explicitly
714 initialized variables are SAVE_IMPLICIT and explicitly saved are
715 SAVE_EXPLICIT. */
716 if (!sym->attr.use_assoc
717 && (sym->attr.save != SAVE_NONE || sym->attr.data
718 || (sym->value && sym->ns->proc_name->attr.is_main_program)
719 || (flag_coarray == GFC_FCOARRAY_LIB
720 && sym->attr.codimension && !sym->attr.allocatable)))
721 TREE_STATIC (decl) = 1;
722
723 /* If derived-type variables with DTIO procedures are not made static
724 some bits of code referencing them get optimized away.
725 TODO Understand why this is so and fix it. */
726 if (!sym->attr.use_assoc
727 && ((sym->ts.type == BT_DERIVED
728 && sym->ts.u.derived->attr.has_dtio_procs)
729 || (sym->ts.type == BT_CLASS
730 && CLASS_DATA (sym)->ts.u.derived->attr.has_dtio_procs)))
731 TREE_STATIC (decl) = 1;
732
733 /* Treat asynchronous variables the same as volatile, for now. */
734 if (sym->attr.volatile_ || sym->attr.asynchronous)
735 {
736 TREE_THIS_VOLATILE (decl) = 1;
737 TREE_SIDE_EFFECTS (decl) = 1;
738 new_type = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE);
739 TREE_TYPE (decl) = new_type;
740 }
741
742 /* Keep variables larger than max-stack-var-size off stack. */
743 if (!(sym->ns->proc_name && sym->ns->proc_name->attr.recursive)
744 && !sym->attr.automatic
745 && !sym->attr.associate_var
746 && sym->attr.save != SAVE_EXPLICIT
747 && sym->attr.save != SAVE_IMPLICIT
748 && INTEGER_CST_P (DECL_SIZE_UNIT (decl))
749 && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))
750 /* Put variable length auto array pointers always into stack. */
751 && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE
752 || sym->attr.dimension == 0
753 || sym->as->type != AS_EXPLICIT
754 || sym->attr.pointer
755 || sym->attr.allocatable)
756 && !DECL_ARTIFICIAL (decl))
757 {
758 if (flag_max_stack_var_size > 0
759 && !(sym->ns->proc_name
760 && sym->ns->proc_name->attr.is_main_program))
761 gfc_warning (OPT_Wsurprising,
762 "Array %qs at %L is larger than limit set by "
763 "%<-fmax-stack-var-size=%>, moved from stack to static "
764 "storage. This makes the procedure unsafe when called "
765 "recursively, or concurrently from multiple threads. "
766 "Consider increasing the %<-fmax-stack-var-size=%> "
767 "limit (or use %<-frecursive%>, which implies "
768 "unlimited %<-fmax-stack-var-size%>) - or change the "
769 "code to use an ALLOCATABLE array. If the variable is "
770 "never accessed concurrently, this warning can be "
771 "ignored, and the variable could also be declared with "
772 "the SAVE attribute.",
773 sym->name, &sym->declared_at);
774
775 TREE_STATIC (decl) = 1;
776
777 /* Because the size of this variable isn't known until now, we may have
778 greedily added an initializer to this variable (in build_init_assign)
779 even though the max-stack-var-size indicates the variable should be
780 static. Therefore we rip out the automatic initializer here and
781 replace it with a static one. */
782 gfc_symtree *st = gfc_find_symtree (sym->ns->sym_root, sym->name);
783 gfc_code *prev = NULL;
784 gfc_code *code = sym->ns->code;
785 while (code && code->op == EXEC_INIT_ASSIGN)
786 {
787 /* Look for an initializer meant for this symbol. */
788 if (code->expr1->symtree == st)
789 {
790 if (prev)
791 prev->next = code->next;
792 else
793 sym->ns->code = code->next;
794
795 break;
796 }
797
798 prev = code;
799 code = code->next;
800 }
801 if (code && code->op == EXEC_INIT_ASSIGN)
802 {
803 /* Keep the init expression for a static initializer. */
804 sym->value = code->expr2;
805 /* Cleanup the defunct code object, without freeing the init expr. */
806 code->expr2 = NULL;
807 gfc_free_statement (code);
808 free (code);
809 }
810 }
811
812 /* Handle threadprivate variables. */
813 if (sym->attr.threadprivate
814 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
815 set_decl_tls_model (decl, decl_default_tls_model (decl));
816
817 /* Mark weak variables. */
818 if (sym->attr.ext_attr & (1 << EXT_ATTR_WEAK))
819 declare_weak (decl);
820
821 gfc_finish_decl_attrs (decl, &sym->attr);
822 }
823
824
825 /* Allocate the lang-specific part of a decl. */
826
827 void
828 gfc_allocate_lang_decl (tree decl)
829 {
830 if (DECL_LANG_SPECIFIC (decl) == NULL)
831 DECL_LANG_SPECIFIC (decl) = ggc_cleared_alloc<struct lang_decl> ();
832 }
833
834 /* Remember a symbol to generate initialization/cleanup code at function
835 entry/exit. */
836
837 static void
838 gfc_defer_symbol_init (gfc_symbol * sym)
839 {
840 gfc_symbol *p;
841 gfc_symbol *last;
842 gfc_symbol *head;
843
844 /* Don't add a symbol twice. */
845 if (sym->tlink)
846 return;
847
848 last = head = sym->ns->proc_name;
849 p = last->tlink;
850
851 /* Make sure that setup code for dummy variables which are used in the
852 setup of other variables is generated first. */
853 if (sym->attr.dummy)
854 {
855 /* Find the first dummy arg seen after us, or the first non-dummy arg.
856 This is a circular list, so don't go past the head. */
857 while (p != head
858 && (!p->attr.dummy || p->dummy_order > sym->dummy_order))
859 {
860 last = p;
861 p = p->tlink;
862 }
863 }
864 /* Insert in between last and p. */
865 last->tlink = sym;
866 sym->tlink = p;
867 }
868
869
870 /* Used in gfc_get_symbol_decl and gfc_get_derived_type to obtain the
871 backend_decl for a module symbol, if it all ready exists. If the
872 module gsymbol does not exist, it is created. If the symbol does
873 not exist, it is added to the gsymbol namespace. Returns true if
874 an existing backend_decl is found. */
875
876 bool
877 gfc_get_module_backend_decl (gfc_symbol *sym)
878 {
879 gfc_gsymbol *gsym;
880 gfc_symbol *s;
881 gfc_symtree *st;
882
883 gsym = gfc_find_gsymbol (gfc_gsym_root, sym->module);
884
885 if (!gsym || (gsym->ns && gsym->type == GSYM_MODULE))
886 {
887 st = NULL;
888 s = NULL;
889
890 /* Check for a symbol with the same name. */
891 if (gsym)
892 gfc_find_symbol (sym->name, gsym->ns, 0, &s);
893
894 if (!s)
895 {
896 if (!gsym)
897 {
898 gsym = gfc_get_gsymbol (sym->module, false);
899 gsym->type = GSYM_MODULE;
900 gsym->ns = gfc_get_namespace (NULL, 0);
901 }
902
903 st = gfc_new_symtree (&gsym->ns->sym_root, sym->name);
904 st->n.sym = sym;
905 sym->refs++;
906 }
907 else if (gfc_fl_struct (sym->attr.flavor))
908 {
909 if (s && s->attr.flavor == FL_PROCEDURE)
910 {
911 gfc_interface *intr;
912 gcc_assert (s->attr.generic);
913 for (intr = s->generic; intr; intr = intr->next)
914 if (gfc_fl_struct (intr->sym->attr.flavor))
915 {
916 s = intr->sym;
917 break;
918 }
919 }
920
921 /* Normally we can assume that s is a derived-type symbol since it
922 shares a name with the derived-type sym. However if sym is a
923 STRUCTURE, it may in fact share a name with any other basic type
924 variable. If s is in fact of derived type then we can continue
925 looking for a duplicate type declaration. */
926 if (sym->attr.flavor == FL_STRUCT && s->ts.type == BT_DERIVED)
927 {
928 s = s->ts.u.derived;
929 }
930
931 if (gfc_fl_struct (s->attr.flavor) && !s->backend_decl)
932 {
933 if (s->attr.flavor == FL_UNION)
934 s->backend_decl = gfc_get_union_type (s);
935 else
936 s->backend_decl = gfc_get_derived_type (s);
937 }
938 gfc_copy_dt_decls_ifequal (s, sym, true);
939 return true;
940 }
941 else if (s->backend_decl)
942 {
943 if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
944 gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived,
945 true);
946 else if (sym->ts.type == BT_CHARACTER)
947 sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl;
948 sym->backend_decl = s->backend_decl;
949 return true;
950 }
951 }
952 return false;
953 }
954
955
956 /* Create an array index type variable with function scope. */
957
958 static tree
959 create_index_var (const char * pfx, int nest)
960 {
961 tree decl;
962
963 decl = gfc_create_var_np (gfc_array_index_type, pfx);
964 if (nest)
965 gfc_add_decl_to_parent_function (decl);
966 else
967 gfc_add_decl_to_function (decl);
968 return decl;
969 }
970
971
972 /* Create variables to hold all the non-constant bits of info for a
973 descriptorless array. Remember these in the lang-specific part of the
974 type. */
975
976 static void
977 gfc_build_qualified_array (tree decl, gfc_symbol * sym)
978 {
979 tree type;
980 int dim;
981 int nest;
982 gfc_namespace* procns;
983 symbol_attribute *array_attr;
984 gfc_array_spec *as;
985 bool is_classarray = IS_CLASS_ARRAY (sym);
986
987 type = TREE_TYPE (decl);
988 array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr;
989 as = is_classarray ? CLASS_DATA (sym)->as : sym->as;
990
991 /* We just use the descriptor, if there is one. */
992 if (GFC_DESCRIPTOR_TYPE_P (type))
993 return;
994
995 gcc_assert (GFC_ARRAY_TYPE_P (type));
996 procns = gfc_find_proc_namespace (sym->ns);
997 nest = (procns->proc_name->backend_decl != current_function_decl)
998 && !sym->attr.contained;
999
1000 if (array_attr->codimension && flag_coarray == GFC_FCOARRAY_LIB
1001 && as->type != AS_ASSUMED_SHAPE
1002 && GFC_TYPE_ARRAY_CAF_TOKEN (type) == NULL_TREE)
1003 {
1004 tree token;
1005 tree token_type = build_qualified_type (pvoid_type_node,
1006 TYPE_QUAL_RESTRICT);
1007
1008 if (sym->module && (sym->attr.use_assoc
1009 || sym->ns->proc_name->attr.flavor == FL_MODULE))
1010 {
1011 tree token_name
1012 = get_identifier (gfc_get_string (GFC_PREFIX ("caf_token%s"),
1013 IDENTIFIER_POINTER (gfc_sym_mangled_identifier (sym))));
1014 token = build_decl (DECL_SOURCE_LOCATION (decl), VAR_DECL, token_name,
1015 token_type);
1016 if (sym->attr.use_assoc)
1017 DECL_EXTERNAL (token) = 1;
1018 else
1019 TREE_STATIC (token) = 1;
1020
1021 TREE_PUBLIC (token) = 1;
1022
1023 if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
1024 {
1025 DECL_VISIBILITY (token) = VISIBILITY_HIDDEN;
1026 DECL_VISIBILITY_SPECIFIED (token) = true;
1027 }
1028 }
1029 else
1030 {
1031 token = gfc_create_var_np (token_type, "caf_token");
1032 TREE_STATIC (token) = 1;
1033 }
1034
1035 GFC_TYPE_ARRAY_CAF_TOKEN (type) = token;
1036 DECL_ARTIFICIAL (token) = 1;
1037 DECL_NONALIASED (token) = 1;
1038
1039 if (sym->module && !sym->attr.use_assoc)
1040 {
1041 pushdecl (token);
1042 DECL_CONTEXT (token) = sym->ns->proc_name->backend_decl;
1043 gfc_module_add_decl (cur_module, token);
1044 }
1045 else if (sym->attr.host_assoc
1046 && TREE_CODE (DECL_CONTEXT (current_function_decl))
1047 != TRANSLATION_UNIT_DECL)
1048 gfc_add_decl_to_parent_function (token);
1049 else
1050 gfc_add_decl_to_function (token);
1051 }
1052
1053 for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++)
1054 {
1055 if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE)
1056 {
1057 GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest);
1058 suppress_warning (GFC_TYPE_ARRAY_LBOUND (type, dim));
1059 }
1060 /* Don't try to use the unknown bound for assumed shape arrays. */
1061 if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE
1062 && (as->type != AS_ASSUMED_SIZE
1063 || dim < GFC_TYPE_ARRAY_RANK (type) - 1))
1064 {
1065 GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest);
1066 suppress_warning (GFC_TYPE_ARRAY_UBOUND (type, dim));
1067 }
1068
1069 if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE)
1070 {
1071 GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest);
1072 suppress_warning (GFC_TYPE_ARRAY_STRIDE (type, dim));
1073 }
1074 }
1075 for (dim = GFC_TYPE_ARRAY_RANK (type);
1076 dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type); dim++)
1077 {
1078 if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE)
1079 {
1080 GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest);
1081 suppress_warning (GFC_TYPE_ARRAY_LBOUND (type, dim));
1082 }
1083 /* Don't try to use the unknown ubound for the last coarray dimension. */
1084 if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE
1085 && dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type) - 1)
1086 {
1087 GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest);
1088 suppress_warning (GFC_TYPE_ARRAY_UBOUND (type, dim));
1089 }
1090 }
1091 if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE)
1092 {
1093 GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type,
1094 "offset");
1095 suppress_warning (GFC_TYPE_ARRAY_OFFSET (type));
1096
1097 if (nest)
1098 gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type));
1099 else
1100 gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type));
1101 }
1102
1103 if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE
1104 && as->type != AS_ASSUMED_SIZE)
1105 {
1106 GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest);
1107 suppress_warning (GFC_TYPE_ARRAY_SIZE (type));
1108 }
1109
1110 if (POINTER_TYPE_P (type))
1111 {
1112 gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type)));
1113 gcc_assert (TYPE_LANG_SPECIFIC (type)
1114 == TYPE_LANG_SPECIFIC (TREE_TYPE (type)));
1115 type = TREE_TYPE (type);
1116 }
1117
1118 if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type))
1119 {
1120 tree size, range;
1121
1122 size = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
1123 GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node);
1124 range = build_range_type (gfc_array_index_type, gfc_index_zero_node,
1125 size);
1126 TYPE_DOMAIN (type) = range;
1127 layout_type (type);
1128 }
1129
1130 if (TYPE_NAME (type) != NULL_TREE && as->rank > 0
1131 && GFC_TYPE_ARRAY_UBOUND (type, as->rank - 1) != NULL_TREE
1132 && VAR_P (GFC_TYPE_ARRAY_UBOUND (type, as->rank - 1)))
1133 {
1134 tree gtype = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
1135
1136 for (dim = 0; dim < as->rank - 1; dim++)
1137 {
1138 gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE);
1139 gtype = TREE_TYPE (gtype);
1140 }
1141 gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE);
1142 if (TYPE_MAX_VALUE (TYPE_DOMAIN (gtype)) == NULL)
1143 TYPE_NAME (type) = NULL_TREE;
1144 }
1145
1146 if (TYPE_NAME (type) == NULL_TREE)
1147 {
1148 tree gtype = TREE_TYPE (type), rtype, type_decl;
1149
1150 for (dim = as->rank - 1; dim >= 0; dim--)
1151 {
1152 tree lbound, ubound;
1153 lbound = GFC_TYPE_ARRAY_LBOUND (type, dim);
1154 ubound = GFC_TYPE_ARRAY_UBOUND (type, dim);
1155 rtype = build_range_type (gfc_array_index_type, lbound, ubound);
1156 gtype = build_array_type (gtype, rtype);
1157 /* Ensure the bound variables aren't optimized out at -O0.
1158 For -O1 and above they often will be optimized out, but
1159 can be tracked by VTA. Also set DECL_NAMELESS, so that
1160 the artificial lbound.N or ubound.N DECL_NAME doesn't
1161 end up in debug info. */
1162 if (lbound
1163 && VAR_P (lbound)
1164 && DECL_ARTIFICIAL (lbound)
1165 && DECL_IGNORED_P (lbound))
1166 {
1167 if (DECL_NAME (lbound)
1168 && strstr (IDENTIFIER_POINTER (DECL_NAME (lbound)),
1169 "lbound") != 0)
1170 DECL_NAMELESS (lbound) = 1;
1171 DECL_IGNORED_P (lbound) = 0;
1172 }
1173 if (ubound
1174 && VAR_P (ubound)
1175 && DECL_ARTIFICIAL (ubound)
1176 && DECL_IGNORED_P (ubound))
1177 {
1178 if (DECL_NAME (ubound)
1179 && strstr (IDENTIFIER_POINTER (DECL_NAME (ubound)),
1180 "ubound") != 0)
1181 DECL_NAMELESS (ubound) = 1;
1182 DECL_IGNORED_P (ubound) = 0;
1183 }
1184 }
1185 TYPE_NAME (type) = type_decl = build_decl (input_location,
1186 TYPE_DECL, NULL, gtype);
1187 DECL_ORIGINAL_TYPE (type_decl) = gtype;
1188 }
1189 }
1190
1191
1192 /* For some dummy arguments we don't use the actual argument directly.
1193 Instead we create a local decl and use that. This allows us to perform
1194 initialization, and construct full type information. */
1195
1196 static tree
1197 gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy)
1198 {
1199 tree decl;
1200 tree type;
1201 gfc_array_spec *as;
1202 symbol_attribute *array_attr;
1203 char *name;
1204 gfc_packed packed;
1205 int n;
1206 bool known_size;
1207 bool is_classarray = IS_CLASS_ARRAY (sym);
1208
1209 /* Use the array as and attr. */
1210 as = is_classarray ? CLASS_DATA (sym)->as : sym->as;
1211 array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr;
1212
1213 /* The dummy is returned for pointer, allocatable or assumed rank arrays.
1214 For class arrays the information if sym is an allocatable or pointer
1215 object needs to be checked explicitly (IS_CLASS_ARRAY can be false for
1216 too many reasons to be of use here). */
1217 if ((sym->ts.type != BT_CLASS && sym->attr.pointer)
1218 || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.class_pointer)
1219 || array_attr->allocatable
1220 || (as && as->type == AS_ASSUMED_RANK))
1221 return dummy;
1222
1223 /* Add to list of variables if not a fake result variable.
1224 These symbols are set on the symbol only, not on the class component. */
1225 if (sym->attr.result || sym->attr.dummy)
1226 gfc_defer_symbol_init (sym);
1227
1228 /* For a class array the array descriptor is in the _data component, while
1229 for a regular array the TREE_TYPE of the dummy is a pointer to the
1230 descriptor. */
1231 type = TREE_TYPE (is_classarray ? gfc_class_data_get (dummy)
1232 : TREE_TYPE (dummy));
1233 /* type now is the array descriptor w/o any indirection. */
1234 gcc_assert (TREE_CODE (dummy) == PARM_DECL
1235 && POINTER_TYPE_P (TREE_TYPE (dummy)));
1236
1237 /* Do we know the element size? */
1238 known_size = sym->ts.type != BT_CHARACTER
1239 || INTEGER_CST_P (sym->ts.u.cl->backend_decl);
1240
1241 if (known_size && !GFC_DESCRIPTOR_TYPE_P (type))
1242 {
1243 /* For descriptorless arrays with known element size the actual
1244 argument is sufficient. */
1245 gfc_build_qualified_array (dummy, sym);
1246 return dummy;
1247 }
1248
1249 if (GFC_DESCRIPTOR_TYPE_P (type))
1250 {
1251 /* Create a descriptorless array pointer. */
1252 packed = PACKED_NO;
1253
1254 /* Even when -frepack-arrays is used, symbols with TARGET attribute
1255 are not repacked. */
1256 if (!flag_repack_arrays || sym->attr.target)
1257 {
1258 if (as->type == AS_ASSUMED_SIZE)
1259 packed = PACKED_FULL;
1260 }
1261 else
1262 {
1263 if (as->type == AS_EXPLICIT)
1264 {
1265 packed = PACKED_FULL;
1266 for (n = 0; n < as->rank; n++)
1267 {
1268 if (!(as->upper[n]
1269 && as->lower[n]
1270 && as->upper[n]->expr_type == EXPR_CONSTANT
1271 && as->lower[n]->expr_type == EXPR_CONSTANT))
1272 {
1273 packed = PACKED_PARTIAL;
1274 break;
1275 }
1276 }
1277 }
1278 else
1279 packed = PACKED_PARTIAL;
1280 }
1281
1282 /* For classarrays the element type is required, but
1283 gfc_typenode_for_spec () returns the array descriptor. */
1284 type = is_classarray ? gfc_get_element_type (type)
1285 : gfc_typenode_for_spec (&sym->ts);
1286 type = gfc_get_nodesc_array_type (type, as, packed,
1287 !sym->attr.target);
1288 }
1289 else
1290 {
1291 /* We now have an expression for the element size, so create a fully
1292 qualified type. Reset sym->backend decl or this will just return the
1293 old type. */
1294 DECL_ARTIFICIAL (sym->backend_decl) = 1;
1295 sym->backend_decl = NULL_TREE;
1296 type = gfc_sym_type (sym);
1297 packed = PACKED_FULL;
1298 }
1299
1300 ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0);
1301 decl = build_decl (input_location,
1302 VAR_DECL, get_identifier (name), type);
1303
1304 DECL_ARTIFICIAL (decl) = 1;
1305 DECL_NAMELESS (decl) = 1;
1306 TREE_PUBLIC (decl) = 0;
1307 TREE_STATIC (decl) = 0;
1308 DECL_EXTERNAL (decl) = 0;
1309
1310 /* Avoid uninitialized warnings for optional dummy arguments. */
1311 if ((sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.optional)
1312 || sym->attr.optional)
1313 suppress_warning (decl);
1314
1315 /* We should never get deferred shape arrays here. We used to because of
1316 frontend bugs. */
1317 gcc_assert (as->type != AS_DEFERRED);
1318
1319 if (packed == PACKED_PARTIAL)
1320 GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1;
1321 else if (packed == PACKED_FULL)
1322 GFC_DECL_PACKED_ARRAY (decl) = 1;
1323
1324 gfc_build_qualified_array (decl, sym);
1325
1326 if (DECL_LANG_SPECIFIC (dummy))
1327 DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy);
1328 else
1329 gfc_allocate_lang_decl (decl);
1330
1331 GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy;
1332
1333 if (sym->ns->proc_name->backend_decl == current_function_decl
1334 || sym->attr.contained)
1335 gfc_add_decl_to_function (decl);
1336 else
1337 gfc_add_decl_to_parent_function (decl);
1338
1339 return decl;
1340 }
1341
1342 /* Return a constant or a variable to use as a string length. Does not
1343 add the decl to the current scope. */
1344
1345 static tree
1346 gfc_create_string_length (gfc_symbol * sym)
1347 {
1348 gcc_assert (sym->ts.u.cl);
1349 gfc_conv_const_charlen (sym->ts.u.cl);
1350
1351 if (sym->ts.u.cl->backend_decl == NULL_TREE)
1352 {
1353 tree length;
1354 const char *name;
1355
1356 /* The string length variable shall be in static memory if it is either
1357 explicitly SAVED, a module variable or with -fno-automatic. Only
1358 relevant is "len=:" - otherwise, it is either a constant length or
1359 it is an automatic variable. */
1360 bool static_length = sym->attr.save
1361 || sym->ns->proc_name->attr.flavor == FL_MODULE
1362 || (flag_max_stack_var_size == 0
1363 && sym->ts.deferred && !sym->attr.dummy
1364 && !sym->attr.result && !sym->attr.function);
1365
1366 /* Also prefix the mangled name. We need to call GFC_PREFIX for static
1367 variables as some systems do not support the "." in the assembler name.
1368 For nonstatic variables, the "." does not appear in assembler. */
1369 if (static_length)
1370 {
1371 if (sym->module)
1372 name = gfc_get_string (GFC_PREFIX ("%s_MOD_%s"), sym->module,
1373 sym->name);
1374 else
1375 name = gfc_get_string (GFC_PREFIX ("%s"), sym->name);
1376 }
1377 else if (sym->module)
1378 name = gfc_get_string (".__%s_MOD_%s", sym->module, sym->name);
1379 else
1380 name = gfc_get_string (".%s", sym->name);
1381
1382 length = build_decl (input_location,
1383 VAR_DECL, get_identifier (name),
1384 gfc_charlen_type_node);
1385 DECL_ARTIFICIAL (length) = 1;
1386 TREE_USED (length) = 1;
1387 if (sym->ns->proc_name->tlink != NULL)
1388 gfc_defer_symbol_init (sym);
1389
1390 sym->ts.u.cl->backend_decl = length;
1391
1392 if (static_length)
1393 TREE_STATIC (length) = 1;
1394
1395 if (sym->ns->proc_name->attr.flavor == FL_MODULE
1396 && (sym->attr.access != ACCESS_PRIVATE || sym->attr.public_used))
1397 TREE_PUBLIC (length) = 1;
1398 }
1399
1400 gcc_assert (sym->ts.u.cl->backend_decl != NULL_TREE);
1401 return sym->ts.u.cl->backend_decl;
1402 }
1403
1404 /* If a variable is assigned a label, we add another two auxiliary
1405 variables. */
1406
1407 static void
1408 gfc_add_assign_aux_vars (gfc_symbol * sym)
1409 {
1410 tree addr;
1411 tree length;
1412 tree decl;
1413
1414 gcc_assert (sym->backend_decl);
1415
1416 decl = sym->backend_decl;
1417 gfc_allocate_lang_decl (decl);
1418 GFC_DECL_ASSIGN (decl) = 1;
1419 length = build_decl (input_location,
1420 VAR_DECL, create_tmp_var_name (sym->name),
1421 gfc_charlen_type_node);
1422 addr = build_decl (input_location,
1423 VAR_DECL, create_tmp_var_name (sym->name),
1424 pvoid_type_node);
1425 gfc_finish_var_decl (length, sym);
1426 gfc_finish_var_decl (addr, sym);
1427 /* STRING_LENGTH is also used as flag. Less than -1 means that
1428 ASSIGN_ADDR cannot be used. Equal -1 means that ASSIGN_ADDR is the
1429 target label's address. Otherwise, value is the length of a format string
1430 and ASSIGN_ADDR is its address. */
1431 if (TREE_STATIC (length))
1432 DECL_INITIAL (length) = build_int_cst (gfc_charlen_type_node, -2);
1433 else
1434 gfc_defer_symbol_init (sym);
1435
1436 GFC_DECL_STRING_LEN (decl) = length;
1437 GFC_DECL_ASSIGN_ADDR (decl) = addr;
1438 }
1439
1440
1441 static tree
1442 add_attributes_to_decl (symbol_attribute sym_attr, tree list)
1443 {
1444 unsigned id;
1445 tree attr;
1446
1447 for (id = 0; id < EXT_ATTR_NUM; id++)
1448 if (sym_attr.ext_attr & (1 << id) && ext_attr_list[id].middle_end_name)
1449 {
1450 attr = build_tree_list (
1451 get_identifier (ext_attr_list[id].middle_end_name),
1452 NULL_TREE);
1453 list = chainon (list, attr);
1454 }
1455
1456 tree clauses = NULL_TREE;
1457
1458 if (sym_attr.oacc_routine_lop != OACC_ROUTINE_LOP_NONE)
1459 {
1460 omp_clause_code code;
1461 switch (sym_attr.oacc_routine_lop)
1462 {
1463 case OACC_ROUTINE_LOP_GANG:
1464 code = OMP_CLAUSE_GANG;
1465 break;
1466 case OACC_ROUTINE_LOP_WORKER:
1467 code = OMP_CLAUSE_WORKER;
1468 break;
1469 case OACC_ROUTINE_LOP_VECTOR:
1470 code = OMP_CLAUSE_VECTOR;
1471 break;
1472 case OACC_ROUTINE_LOP_SEQ:
1473 code = OMP_CLAUSE_SEQ;
1474 break;
1475 case OACC_ROUTINE_LOP_NONE:
1476 case OACC_ROUTINE_LOP_ERROR:
1477 default:
1478 gcc_unreachable ();
1479 }
1480 tree c = build_omp_clause (UNKNOWN_LOCATION, code);
1481 OMP_CLAUSE_CHAIN (c) = clauses;
1482 clauses = c;
1483
1484 tree dims = oacc_build_routine_dims (clauses);
1485 list = oacc_replace_fn_attrib_attr (list, dims);
1486 }
1487
1488 if (sym_attr.oacc_routine_nohost)
1489 {
1490 tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_NOHOST);
1491 OMP_CLAUSE_CHAIN (c) = clauses;
1492 clauses = c;
1493 }
1494
1495 if (sym_attr.omp_device_type != OMP_DEVICE_TYPE_UNSET)
1496 {
1497 tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_DEVICE_TYPE);
1498 switch (sym_attr.omp_device_type)
1499 {
1500 case OMP_DEVICE_TYPE_HOST:
1501 OMP_CLAUSE_DEVICE_TYPE_KIND (c) = OMP_CLAUSE_DEVICE_TYPE_HOST;
1502 break;
1503 case OMP_DEVICE_TYPE_NOHOST:
1504 OMP_CLAUSE_DEVICE_TYPE_KIND (c) = OMP_CLAUSE_DEVICE_TYPE_NOHOST;
1505 break;
1506 case OMP_DEVICE_TYPE_ANY:
1507 OMP_CLAUSE_DEVICE_TYPE_KIND (c) = OMP_CLAUSE_DEVICE_TYPE_ANY;
1508 break;
1509 default:
1510 gcc_unreachable ();
1511 }
1512 OMP_CLAUSE_CHAIN (c) = clauses;
1513 clauses = c;
1514 }
1515
1516 if (sym_attr.omp_declare_target_link
1517 || sym_attr.oacc_declare_link)
1518 list = tree_cons (get_identifier ("omp declare target link"),
1519 clauses, list);
1520 else if (sym_attr.omp_declare_target
1521 || sym_attr.oacc_declare_create
1522 || sym_attr.oacc_declare_copyin
1523 || sym_attr.oacc_declare_deviceptr
1524 || sym_attr.oacc_declare_device_resident)
1525 list = tree_cons (get_identifier ("omp declare target"),
1526 clauses, list);
1527
1528 return list;
1529 }
1530
1531
1532 static void build_function_decl (gfc_symbol * sym, bool global);
1533
1534
1535 /* Return the decl for a gfc_symbol, create it if it doesn't already
1536 exist. */
1537
1538 tree
1539 gfc_get_symbol_decl (gfc_symbol * sym)
1540 {
1541 tree decl;
1542 tree length = NULL_TREE;
1543 tree attributes;
1544 int byref;
1545 bool intrinsic_array_parameter = false;
1546 bool fun_or_res;
1547
1548 gcc_assert (sym->attr.referenced
1549 || sym->attr.flavor == FL_PROCEDURE
1550 || sym->attr.use_assoc
1551 || sym->attr.used_in_submodule
1552 || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY
1553 || (sym->module && sym->attr.if_source != IFSRC_DECL
1554 && sym->backend_decl));
1555
1556 if (sym->attr.dummy && sym->ns->proc_name->attr.is_bind_c
1557 && is_CFI_desc (sym, NULL))
1558 {
1559 gcc_assert (sym->backend_decl && (sym->ts.type != BT_CHARACTER
1560 || sym->ts.u.cl->backend_decl));
1561 return sym->backend_decl;
1562 }
1563
1564 if (sym->ns && sym->ns->proc_name && sym->ns->proc_name->attr.function)
1565 byref = gfc_return_by_reference (sym->ns->proc_name);
1566 else
1567 byref = 0;
1568
1569 /* Make sure that the vtab for the declared type is completed. */
1570 if (sym->ts.type == BT_CLASS)
1571 {
1572 gfc_component *c = CLASS_DATA (sym);
1573 if (!c->ts.u.derived->backend_decl)
1574 {
1575 gfc_find_derived_vtab (c->ts.u.derived);
1576 gfc_get_derived_type (sym->ts.u.derived);
1577 }
1578 }
1579
1580 /* PDT parameterized array components and string_lengths must have the
1581 'len' parameters substituted for the expressions appearing in the
1582 declaration of the entity and memory allocated/deallocated. */
1583 if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
1584 && sym->param_list != NULL
1585 && gfc_current_ns == sym->ns
1586 && !(sym->attr.use_assoc || sym->attr.dummy))
1587 gfc_defer_symbol_init (sym);
1588
1589 /* Dummy PDT 'len' parameters should be checked when they are explicit. */
1590 if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
1591 && (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)
1592 && sym->param_list != NULL
1593 && sym->attr.dummy)
1594 gfc_defer_symbol_init (sym);
1595
1596 /* All deferred character length procedures need to retain the backend
1597 decl, which is a pointer to the character length in the caller's
1598 namespace and to declare a local character length. */
1599 if (!byref && sym->attr.function
1600 && sym->ts.type == BT_CHARACTER
1601 && sym->ts.deferred
1602 && sym->ts.u.cl->passed_length == NULL
1603 && sym->ts.u.cl->backend_decl
1604 && TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL)
1605 {
1606 sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl;
1607 gcc_assert (POINTER_TYPE_P (TREE_TYPE (sym->ts.u.cl->passed_length)));
1608 sym->ts.u.cl->backend_decl = build_fold_indirect_ref (sym->ts.u.cl->backend_decl);
1609 }
1610
1611 fun_or_res = byref && (sym->attr.result
1612 || (sym->attr.function && sym->ts.deferred));
1613 if ((sym->attr.dummy && ! sym->attr.function) || fun_or_res)
1614 {
1615 /* Return via extra parameter. */
1616 if (sym->attr.result && byref
1617 && !sym->backend_decl)
1618 {
1619 sym->backend_decl =
1620 DECL_ARGUMENTS (sym->ns->proc_name->backend_decl);
1621 /* For entry master function skip over the __entry
1622 argument. */
1623 if (sym->ns->proc_name->attr.entry_master)
1624 sym->backend_decl = DECL_CHAIN (sym->backend_decl);
1625 }
1626
1627 /* Dummy variables should already have been created. */
1628 gcc_assert (sym->backend_decl);
1629
1630 /* However, the string length of deferred arrays must be set. */
1631 if (sym->ts.type == BT_CHARACTER
1632 && sym->ts.deferred
1633 && sym->attr.dimension
1634 && sym->attr.allocatable)
1635 gfc_defer_symbol_init (sym);
1636
1637 if (sym->attr.pointer && sym->attr.dimension && sym->ts.type != BT_CLASS)
1638 GFC_DECL_PTR_ARRAY_P (sym->backend_decl) = 1;
1639
1640 /* Create a character length variable. */
1641 if (sym->ts.type == BT_CHARACTER)
1642 {
1643 /* For a deferred dummy, make a new string length variable. */
1644 if (sym->ts.deferred
1645 &&
1646 (sym->ts.u.cl->passed_length == sym->ts.u.cl->backend_decl))
1647 sym->ts.u.cl->backend_decl = NULL_TREE;
1648
1649 if (sym->ts.deferred && byref)
1650 {
1651 /* The string length of a deferred char array is stored in the
1652 parameter at sym->ts.u.cl->backend_decl as a reference and
1653 marked as a result. Exempt this variable from generating a
1654 temporary for it. */
1655 if (sym->attr.result)
1656 {
1657 /* We need to insert a indirect ref for param decls. */
1658 if (sym->ts.u.cl->backend_decl
1659 && TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL)
1660 {
1661 sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl;
1662 sym->ts.u.cl->backend_decl =
1663 build_fold_indirect_ref (sym->ts.u.cl->backend_decl);
1664 }
1665 }
1666 /* For all other parameters make sure, that they are copied so
1667 that the value and any modifications are local to the routine
1668 by generating a temporary variable. */
1669 else if (sym->attr.function
1670 && sym->ts.u.cl->passed_length == NULL
1671 && sym->ts.u.cl->backend_decl)
1672 {
1673 sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl;
1674 if (POINTER_TYPE_P (TREE_TYPE (sym->ts.u.cl->passed_length)))
1675 sym->ts.u.cl->backend_decl
1676 = build_fold_indirect_ref (sym->ts.u.cl->backend_decl);
1677 else
1678 sym->ts.u.cl->backend_decl = NULL_TREE;
1679 }
1680 }
1681
1682 if (sym->ts.u.cl->backend_decl == NULL_TREE)
1683 length = gfc_create_string_length (sym);
1684 else
1685 length = sym->ts.u.cl->backend_decl;
1686 if (VAR_P (length) && DECL_FILE_SCOPE_P (length))
1687 {
1688 /* Add the string length to the same context as the symbol. */
1689 if (DECL_CONTEXT (length) == NULL_TREE)
1690 {
1691 if (sym->backend_decl == current_function_decl
1692 || (DECL_CONTEXT (sym->backend_decl)
1693 == current_function_decl))
1694 gfc_add_decl_to_function (length);
1695 else
1696 gfc_add_decl_to_parent_function (length);
1697 }
1698
1699 gcc_assert (sym->backend_decl == current_function_decl
1700 ? DECL_CONTEXT (length) == current_function_decl
1701 : (DECL_CONTEXT (sym->backend_decl)
1702 == DECL_CONTEXT (length)));
1703
1704 gfc_defer_symbol_init (sym);
1705 }
1706 }
1707
1708 /* Use a copy of the descriptor for dummy arrays. */
1709 if ((sym->attr.dimension || sym->attr.codimension)
1710 && !TREE_USED (sym->backend_decl))
1711 {
1712 decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
1713 /* Prevent the dummy from being detected as unused if it is copied. */
1714 if (sym->backend_decl != NULL && decl != sym->backend_decl)
1715 DECL_ARTIFICIAL (sym->backend_decl) = 1;
1716 sym->backend_decl = decl;
1717 }
1718
1719 /* Returning the descriptor for dummy class arrays is hazardous, because
1720 some caller is expecting an expression to apply the component refs to.
1721 Therefore the descriptor is only created and stored in
1722 sym->backend_decl's GFC_DECL_SAVED_DESCRIPTOR. The caller is then
1723 responsible to extract it from there, when the descriptor is
1724 desired. */
1725 if (IS_CLASS_ARRAY (sym)
1726 && (!DECL_LANG_SPECIFIC (sym->backend_decl)
1727 || !GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl)))
1728 {
1729 decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
1730 /* Prevent the dummy from being detected as unused if it is copied. */
1731 if (sym->backend_decl != NULL && decl != sym->backend_decl)
1732 DECL_ARTIFICIAL (sym->backend_decl) = 1;
1733 sym->backend_decl = decl;
1734 }
1735
1736 TREE_USED (sym->backend_decl) = 1;
1737 if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0)
1738 gfc_add_assign_aux_vars (sym);
1739
1740 if (sym->ts.type == BT_CLASS && sym->backend_decl)
1741 GFC_DECL_CLASS(sym->backend_decl) = 1;
1742
1743 return sym->backend_decl;
1744 }
1745
1746 if (sym->result == sym && sym->attr.assign
1747 && GFC_DECL_ASSIGN (sym->backend_decl) == 0)
1748 gfc_add_assign_aux_vars (sym);
1749
1750 if (sym->backend_decl)
1751 return sym->backend_decl;
1752
1753 /* Special case for array-valued named constants from intrinsic
1754 procedures; those are inlined. */
1755 if (sym->attr.use_assoc && sym->attr.flavor == FL_PARAMETER
1756 && (sym->from_intmod == INTMOD_ISO_FORTRAN_ENV
1757 || sym->from_intmod == INTMOD_ISO_C_BINDING))
1758 intrinsic_array_parameter = true;
1759
1760 /* If use associated compilation, use the module
1761 declaration. */
1762 if ((sym->attr.flavor == FL_VARIABLE
1763 || sym->attr.flavor == FL_PARAMETER)
1764 && (sym->attr.use_assoc || sym->attr.used_in_submodule)
1765 && !intrinsic_array_parameter
1766 && sym->module
1767 && gfc_get_module_backend_decl (sym))
1768 {
1769 if (sym->ts.type == BT_CLASS && sym->backend_decl)
1770 GFC_DECL_CLASS(sym->backend_decl) = 1;
1771 return sym->backend_decl;
1772 }
1773
1774 if (sym->attr.flavor == FL_PROCEDURE)
1775 {
1776 /* Catch functions. Only used for actual parameters,
1777 procedure pointers and procptr initialization targets. */
1778 if (sym->attr.use_assoc
1779 || sym->attr.used_in_submodule
1780 || sym->attr.intrinsic
1781 || sym->attr.if_source != IFSRC_DECL)
1782 {
1783 decl = gfc_get_extern_function_decl (sym);
1784 }
1785 else
1786 {
1787 if (!sym->backend_decl)
1788 build_function_decl (sym, false);
1789 decl = sym->backend_decl;
1790 }
1791 return decl;
1792 }
1793
1794 if (sym->attr.intrinsic)
1795 gfc_internal_error ("intrinsic variable which isn't a procedure");
1796
1797 /* Create string length decl first so that they can be used in the
1798 type declaration. For associate names, the target character
1799 length is used. Set 'length' to a constant so that if the
1800 string length is a variable, it is not finished a second time. */
1801 if (sym->ts.type == BT_CHARACTER)
1802 {
1803 if (sym->attr.associate_var
1804 && sym->ts.deferred
1805 && sym->assoc && sym->assoc->target
1806 && ((sym->assoc->target->expr_type == EXPR_VARIABLE
1807 && sym->assoc->target->symtree->n.sym->ts.type != BT_CHARACTER)
1808 || sym->assoc->target->expr_type != EXPR_VARIABLE))
1809 sym->ts.u.cl->backend_decl = NULL_TREE;
1810
1811 if (sym->attr.associate_var
1812 && sym->ts.u.cl->backend_decl
1813 && (VAR_P (sym->ts.u.cl->backend_decl)
1814 || TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL))
1815 length = gfc_index_zero_node;
1816 else
1817 length = gfc_create_string_length (sym);
1818 }
1819
1820 /* Create the decl for the variable. */
1821 decl = build_decl (gfc_get_location (&sym->declared_at),
1822 VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym));
1823
1824 /* Add attributes to variables. Functions are handled elsewhere. */
1825 attributes = add_attributes_to_decl (sym->attr, NULL_TREE);
1826 decl_attributes (&decl, attributes, 0);
1827
1828 /* Symbols from modules should have their assembler names mangled.
1829 This is done here rather than in gfc_finish_var_decl because it
1830 is different for string length variables. */
1831 if (sym->module || sym->fn_result_spec)
1832 {
1833 gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym));
1834 if (sym->attr.use_assoc && !intrinsic_array_parameter)
1835 DECL_IGNORED_P (decl) = 1;
1836 }
1837
1838 if (sym->attr.select_type_temporary)
1839 {
1840 DECL_ARTIFICIAL (decl) = 1;
1841 DECL_IGNORED_P (decl) = 1;
1842 }
1843
1844 if (sym->attr.dimension || sym->attr.codimension)
1845 {
1846 /* Create variables to hold the non-constant bits of array info. */
1847 gfc_build_qualified_array (decl, sym);
1848
1849 if (sym->attr.contiguous
1850 || ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer))
1851 GFC_DECL_PACKED_ARRAY (decl) = 1;
1852 }
1853
1854 /* Remember this variable for allocation/cleanup. */
1855 if (sym->attr.dimension || sym->attr.allocatable || sym->attr.codimension
1856 || (sym->ts.type == BT_CLASS &&
1857 (CLASS_DATA (sym)->attr.dimension
1858 || CLASS_DATA (sym)->attr.allocatable))
1859 || (sym->ts.type == BT_DERIVED
1860 && (sym->ts.u.derived->attr.alloc_comp
1861 || (!sym->attr.pointer && !sym->attr.artificial && !sym->attr.save
1862 && !sym->ns->proc_name->attr.is_main_program
1863 && gfc_is_finalizable (sym->ts.u.derived, NULL))))
1864 /* This applies a derived type default initializer. */
1865 || (sym->ts.type == BT_DERIVED
1866 && sym->attr.save == SAVE_NONE
1867 && !sym->attr.data
1868 && !sym->attr.allocatable
1869 && (sym->value && !sym->ns->proc_name->attr.is_main_program)
1870 && !(sym->attr.use_assoc && !intrinsic_array_parameter)))
1871 gfc_defer_symbol_init (sym);
1872
1873 if (sym->ts.type == BT_CHARACTER
1874 && sym->attr.allocatable
1875 && !sym->attr.dimension
1876 && sym->ts.u.cl && sym->ts.u.cl->length
1877 && sym->ts.u.cl->length->expr_type == EXPR_VARIABLE)
1878 gfc_defer_symbol_init (sym);
1879
1880 /* Associate names can use the hidden string length variable
1881 of their associated target. */
1882 if (sym->ts.type == BT_CHARACTER
1883 && TREE_CODE (length) != INTEGER_CST
1884 && TREE_CODE (sym->ts.u.cl->backend_decl) != INDIRECT_REF)
1885 {
1886 length = fold_convert (gfc_charlen_type_node, length);
1887 gfc_finish_var_decl (length, sym);
1888 if (!sym->attr.associate_var
1889 && TREE_CODE (length) == VAR_DECL
1890 && sym->value && sym->value->expr_type != EXPR_NULL
1891 && sym->value->ts.u.cl->length)
1892 {
1893 gfc_expr *len = sym->value->ts.u.cl->length;
1894 DECL_INITIAL (length) = gfc_conv_initializer (len, &len->ts,
1895 TREE_TYPE (length),
1896 false, false, false);
1897 DECL_INITIAL (length) = fold_convert (gfc_charlen_type_node,
1898 DECL_INITIAL (length));
1899 }
1900 else
1901 gcc_assert (!sym->value || sym->value->expr_type == EXPR_NULL);
1902 }
1903
1904 gfc_finish_var_decl (decl, sym);
1905
1906 if (sym->ts.type == BT_CHARACTER)
1907 /* Character variables need special handling. */
1908 gfc_allocate_lang_decl (decl);
1909
1910 if (sym->assoc && sym->attr.subref_array_pointer)
1911 sym->attr.pointer = 1;
1912
1913 if (sym->attr.pointer && sym->attr.dimension
1914 && !sym->ts.deferred
1915 && !(sym->attr.select_type_temporary
1916 && !sym->attr.subref_array_pointer))
1917 GFC_DECL_PTR_ARRAY_P (decl) = 1;
1918
1919 if (sym->ts.type == BT_CLASS)
1920 GFC_DECL_CLASS(decl) = 1;
1921
1922 sym->backend_decl = decl;
1923
1924 if (sym->attr.assign)
1925 gfc_add_assign_aux_vars (sym);
1926
1927 if (intrinsic_array_parameter)
1928 {
1929 TREE_STATIC (decl) = 1;
1930 DECL_EXTERNAL (decl) = 0;
1931 }
1932
1933 if (TREE_STATIC (decl)
1934 && !(sym->attr.use_assoc && !intrinsic_array_parameter)
1935 && (sym->attr.save || sym->ns->proc_name->attr.is_main_program
1936 || !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))
1937 || sym->attr.data || sym->ns->proc_name->attr.flavor == FL_MODULE)
1938 && (flag_coarray != GFC_FCOARRAY_LIB
1939 || !sym->attr.codimension || sym->attr.allocatable)
1940 && !(sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.pdt_type)
1941 && !(sym->ts.type == BT_CLASS
1942 && CLASS_DATA (sym)->ts.u.derived->attr.pdt_type))
1943 {
1944 /* Add static initializer. For procedures, it is only needed if
1945 SAVE is specified otherwise they need to be reinitialized
1946 every time the procedure is entered. The TREE_STATIC is
1947 in this case due to -fmax-stack-var-size=. */
1948
1949 DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
1950 TREE_TYPE (decl), sym->attr.dimension
1951 || (sym->attr.codimension
1952 && sym->attr.allocatable),
1953 sym->attr.pointer || sym->attr.allocatable
1954 || sym->ts.type == BT_CLASS,
1955 sym->attr.proc_pointer);
1956 }
1957
1958 if (!TREE_STATIC (decl)
1959 && POINTER_TYPE_P (TREE_TYPE (decl))
1960 && !sym->attr.pointer
1961 && !sym->attr.allocatable
1962 && !sym->attr.proc_pointer
1963 && !sym->attr.select_type_temporary)
1964 DECL_BY_REFERENCE (decl) = 1;
1965
1966 if (sym->attr.associate_var)
1967 GFC_DECL_ASSOCIATE_VAR_P (decl) = 1;
1968
1969 /* We only longer mark __def_init as read-only if it actually has an
1970 initializer, it does not needlessly take up space in the
1971 read-only section and can go into the BSS instead, see PR 84487.
1972 Marking this as artificial means that OpenMP will treat this as
1973 predetermined shared. */
1974
1975 bool def_init = startswith (sym->name, "__def_init");
1976
1977 if (sym->attr.vtab || def_init)
1978 {
1979 DECL_ARTIFICIAL (decl) = 1;
1980 if (def_init && sym->value)
1981 TREE_READONLY (decl) = 1;
1982 }
1983
1984 return decl;
1985 }
1986
1987
1988 /* Substitute a temporary variable in place of the real one. */
1989
1990 void
1991 gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save)
1992 {
1993 save->attr = sym->attr;
1994 save->decl = sym->backend_decl;
1995
1996 gfc_clear_attr (&sym->attr);
1997 sym->attr.referenced = 1;
1998 sym->attr.flavor = FL_VARIABLE;
1999
2000 sym->backend_decl = decl;
2001 }
2002
2003
2004 /* Restore the original variable. */
2005
2006 void
2007 gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save)
2008 {
2009 sym->attr = save->attr;
2010 sym->backend_decl = save->decl;
2011 }
2012
2013
2014 /* Declare a procedure pointer. */
2015
2016 static tree
2017 get_proc_pointer_decl (gfc_symbol *sym)
2018 {
2019 tree decl;
2020 tree attributes;
2021
2022 if (sym->module || sym->fn_result_spec)
2023 {
2024 const char *name;
2025 gfc_gsymbol *gsym;
2026
2027 name = mangled_identifier (sym);
2028 gsym = gfc_find_gsymbol (gfc_gsym_root, name);
2029 if (gsym != NULL)
2030 {
2031 gfc_symbol *s;
2032 gfc_find_symbol (sym->name, gsym->ns, 0, &s);
2033 if (s && s->backend_decl)
2034 return s->backend_decl;
2035 }
2036 }
2037
2038 decl = sym->backend_decl;
2039 if (decl)
2040 return decl;
2041
2042 decl = build_decl (input_location,
2043 VAR_DECL, get_identifier (sym->name),
2044 build_pointer_type (gfc_get_function_type (sym)));
2045
2046 if (sym->module)
2047 {
2048 /* Apply name mangling. */
2049 gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym));
2050 if (sym->attr.use_assoc)
2051 DECL_IGNORED_P (decl) = 1;
2052 }
2053
2054 if ((sym->ns->proc_name
2055 && sym->ns->proc_name->backend_decl == current_function_decl)
2056 || sym->attr.contained)
2057 gfc_add_decl_to_function (decl);
2058 else if (sym->ns->proc_name->attr.flavor != FL_MODULE)
2059 gfc_add_decl_to_parent_function (decl);
2060
2061 sym->backend_decl = decl;
2062
2063 /* If a variable is USE associated, it's always external. */
2064 if (sym->attr.use_assoc)
2065 {
2066 DECL_EXTERNAL (decl) = 1;
2067 TREE_PUBLIC (decl) = 1;
2068 }
2069 else if (sym->module && sym->ns->proc_name->attr.flavor == FL_MODULE)
2070 {
2071 /* This is the declaration of a module variable. */
2072 TREE_PUBLIC (decl) = 1;
2073 if (sym->attr.access == ACCESS_PRIVATE && !sym->attr.public_used)
2074 {
2075 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
2076 DECL_VISIBILITY_SPECIFIED (decl) = true;
2077 }
2078 TREE_STATIC (decl) = 1;
2079 }
2080
2081 if (!sym->attr.use_assoc
2082 && (sym->attr.save != SAVE_NONE || sym->attr.data
2083 || (sym->value && sym->ns->proc_name->attr.is_main_program)))
2084 TREE_STATIC (decl) = 1;
2085
2086 if (TREE_STATIC (decl) && sym->value)
2087 {
2088 /* Add static initializer. */
2089 DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
2090 TREE_TYPE (decl),
2091 sym->attr.dimension,
2092 false, true);
2093 }
2094
2095 /* Handle threadprivate procedure pointers. */
2096 if (sym->attr.threadprivate
2097 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
2098 set_decl_tls_model (decl, decl_default_tls_model (decl));
2099
2100 attributes = add_attributes_to_decl (sym->attr, NULL_TREE);
2101 decl_attributes (&decl, attributes, 0);
2102
2103 return decl;
2104 }
2105
2106
2107 /* Get a basic decl for an external function. */
2108
2109 tree
2110 gfc_get_extern_function_decl (gfc_symbol * sym, gfc_actual_arglist *actual_args,
2111 const char *fnspec)
2112 {
2113 tree type;
2114 tree fndecl;
2115 tree attributes;
2116 gfc_expr e;
2117 gfc_intrinsic_sym *isym;
2118 gfc_expr argexpr;
2119 char s[GFC_MAX_SYMBOL_LEN + 23]; /* "_gfortran_f2c_specific" and '\0'. */
2120 tree name;
2121 tree mangled_name;
2122 gfc_gsymbol *gsym;
2123
2124 if (sym->backend_decl)
2125 return sym->backend_decl;
2126
2127 /* We should never be creating external decls for alternate entry points.
2128 The procedure may be an alternate entry point, but we don't want/need
2129 to know that. */
2130 gcc_assert (!(sym->attr.entry || sym->attr.entry_master));
2131
2132 if (sym->attr.proc_pointer)
2133 return get_proc_pointer_decl (sym);
2134
2135 /* See if this is an external procedure from the same file. If so,
2136 return the backend_decl. If we are looking at a BIND(C)
2137 procedure and the symbol is not BIND(C), or vice versa, we
2138 haven't found the right procedure. */
2139
2140 if (sym->binding_label)
2141 {
2142 gsym = gfc_find_gsymbol (gfc_gsym_root, sym->binding_label);
2143 if (gsym && !gsym->bind_c)
2144 gsym = NULL;
2145 }
2146 else if (sym->module == NULL)
2147 {
2148 gsym = gfc_find_gsymbol (gfc_gsym_root, sym->name);
2149 if (gsym && gsym->bind_c)
2150 gsym = NULL;
2151 }
2152 else
2153 {
2154 /* Procedure from a different module. */
2155 gsym = NULL;
2156 }
2157
2158 if (gsym && !gsym->defined)
2159 gsym = NULL;
2160
2161 /* This can happen because of C binding. */
2162 if (gsym && gsym->ns && gsym->ns->proc_name
2163 && gsym->ns->proc_name->attr.flavor == FL_MODULE)
2164 goto module_sym;
2165
2166 if ((!sym->attr.use_assoc || sym->attr.if_source != IFSRC_DECL)
2167 && !sym->backend_decl
2168 && gsym && gsym->ns
2169 && ((gsym->type == GSYM_SUBROUTINE) || (gsym->type == GSYM_FUNCTION))
2170 && (gsym->ns->proc_name->backend_decl || !sym->attr.intrinsic))
2171 {
2172 if (!gsym->ns->proc_name->backend_decl)
2173 {
2174 /* By construction, the external function cannot be
2175 a contained procedure. */
2176 locus old_loc;
2177
2178 gfc_save_backend_locus (&old_loc);
2179 push_cfun (NULL);
2180
2181 gfc_create_function_decl (gsym->ns, true);
2182
2183 pop_cfun ();
2184 gfc_restore_backend_locus (&old_loc);
2185 }
2186
2187 /* If the namespace has entries, the proc_name is the
2188 entry master. Find the entry and use its backend_decl.
2189 otherwise, use the proc_name backend_decl. */
2190 if (gsym->ns->entries)
2191 {
2192 gfc_entry_list *entry = gsym->ns->entries;
2193
2194 for (; entry; entry = entry->next)
2195 {
2196 if (strcmp (gsym->name, entry->sym->name) == 0)
2197 {
2198 sym->backend_decl = entry->sym->backend_decl;
2199 break;
2200 }
2201 }
2202 }
2203 else
2204 sym->backend_decl = gsym->ns->proc_name->backend_decl;
2205
2206 if (sym->backend_decl)
2207 {
2208 /* Avoid problems of double deallocation of the backend declaration
2209 later in gfc_trans_use_stmts; cf. PR 45087. */
2210 if (sym->attr.if_source != IFSRC_DECL && sym->attr.use_assoc)
2211 sym->attr.use_assoc = 0;
2212
2213 return sym->backend_decl;
2214 }
2215 }
2216
2217 /* See if this is a module procedure from the same file. If so,
2218 return the backend_decl. */
2219 if (sym->module)
2220 gsym = gfc_find_gsymbol (gfc_gsym_root, sym->module);
2221
2222 module_sym:
2223 if (gsym && gsym->ns
2224 && (gsym->type == GSYM_MODULE
2225 || (gsym->ns->proc_name && gsym->ns->proc_name->attr.flavor == FL_MODULE)))
2226 {
2227 gfc_symbol *s;
2228
2229 s = NULL;
2230 if (gsym->type == GSYM_MODULE)
2231 gfc_find_symbol (sym->name, gsym->ns, 0, &s);
2232 else
2233 gfc_find_symbol (gsym->sym_name, gsym->ns, 0, &s);
2234
2235 if (s && s->backend_decl)
2236 {
2237 if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)
2238 gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived,
2239 true);
2240 else if (sym->ts.type == BT_CHARACTER)
2241 sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl;
2242 sym->backend_decl = s->backend_decl;
2243 return sym->backend_decl;
2244 }
2245 }
2246
2247 if (sym->attr.intrinsic)
2248 {
2249 /* Call the resolution function to get the actual name. This is
2250 a nasty hack which relies on the resolution functions only looking
2251 at the first argument. We pass NULL for the second argument
2252 otherwise things like AINT get confused. */
2253 isym = gfc_find_function (sym->name);
2254 gcc_assert (isym->resolve.f0 != NULL);
2255
2256 memset (&e, 0, sizeof (e));
2257 e.expr_type = EXPR_FUNCTION;
2258
2259 memset (&argexpr, 0, sizeof (argexpr));
2260 gcc_assert (isym->formal);
2261 argexpr.ts = isym->formal->ts;
2262
2263 if (isym->formal->next == NULL)
2264 isym->resolve.f1 (&e, &argexpr);
2265 else
2266 {
2267 if (isym->formal->next->next == NULL)
2268 isym->resolve.f2 (&e, &argexpr, NULL);
2269 else
2270 {
2271 if (isym->formal->next->next->next == NULL)
2272 isym->resolve.f3 (&e, &argexpr, NULL, NULL);
2273 else
2274 {
2275 /* All specific intrinsics take less than 5 arguments. */
2276 gcc_assert (isym->formal->next->next->next->next == NULL);
2277 isym->resolve.f4 (&e, &argexpr, NULL, NULL, NULL);
2278 }
2279 }
2280 }
2281
2282 if (flag_f2c
2283 && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind)
2284 || e.ts.type == BT_COMPLEX))
2285 {
2286 /* Specific which needs a different implementation if f2c
2287 calling conventions are used. */
2288 sprintf (s, "_gfortran_f2c_specific%s", e.value.function.name);
2289 }
2290 else
2291 sprintf (s, "_gfortran_specific%s", e.value.function.name);
2292
2293 name = get_identifier (s);
2294 mangled_name = name;
2295 }
2296 else
2297 {
2298 name = gfc_sym_identifier (sym);
2299 mangled_name = gfc_sym_mangled_function_id (sym);
2300 }
2301
2302 type = gfc_get_function_type (sym, actual_args, fnspec);
2303
2304 fndecl = build_decl (input_location,
2305 FUNCTION_DECL, name, type);
2306
2307 /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes;
2308 TREE_PUBLIC specifies whether a function is globally addressable (i.e.
2309 the opposite of declaring a function as static in C). */
2310 DECL_EXTERNAL (fndecl) = 1;
2311 TREE_PUBLIC (fndecl) = 1;
2312
2313 attributes = add_attributes_to_decl (sym->attr, NULL_TREE);
2314 decl_attributes (&fndecl, attributes, 0);
2315
2316 gfc_set_decl_assembler_name (fndecl, mangled_name);
2317
2318 /* Set the context of this decl. */
2319 if (0 && sym->ns && sym->ns->proc_name)
2320 {
2321 /* TODO: Add external decls to the appropriate scope. */
2322 DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl;
2323 }
2324 else
2325 {
2326 /* Global declaration, e.g. intrinsic subroutine. */
2327 DECL_CONTEXT (fndecl) = NULL_TREE;
2328 }
2329
2330 /* Set attributes for PURE functions. A call to PURE function in the
2331 Fortran 95 sense is both pure and without side effects in the C
2332 sense. */
2333 if (sym->attr.pure || sym->attr.implicit_pure)
2334 {
2335 if (sym->attr.function && !gfc_return_by_reference (sym))
2336 DECL_PURE_P (fndecl) = 1;
2337 /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT)
2338 parameters and don't use alternate returns (is this
2339 allowed?). In that case, calls to them are meaningless, and
2340 can be optimized away. See also in build_function_decl(). */
2341 TREE_SIDE_EFFECTS (fndecl) = 0;
2342 }
2343
2344 /* Mark non-returning functions. */
2345 if (sym->attr.noreturn || sym->attr.ext_attr & (1 << EXT_ATTR_NORETURN))
2346 TREE_THIS_VOLATILE(fndecl) = 1;
2347
2348 sym->backend_decl = fndecl;
2349
2350 if (DECL_CONTEXT (fndecl) == NULL_TREE)
2351 pushdecl_top_level (fndecl);
2352
2353 if (sym->formal_ns
2354 && sym->formal_ns->proc_name == sym)
2355 {
2356 if (sym->formal_ns->omp_declare_simd)
2357 gfc_trans_omp_declare_simd (sym->formal_ns);
2358 if (flag_openmp)
2359 gfc_trans_omp_declare_variant (sym->formal_ns);
2360 }
2361
2362 return fndecl;
2363 }
2364
2365
2366 /* Create a declaration for a procedure. For external functions (in the C
2367 sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is
2368 a master function with alternate entry points. */
2369
2370 static void
2371 build_function_decl (gfc_symbol * sym, bool global)
2372 {
2373 tree fndecl, type, attributes;
2374 symbol_attribute attr;
2375 tree result_decl;
2376 gfc_formal_arglist *f;
2377
2378 bool module_procedure = sym->attr.module_procedure
2379 && sym->ns
2380 && sym->ns->proc_name
2381 && sym->ns->proc_name->attr.flavor == FL_MODULE;
2382
2383 gcc_assert (!sym->attr.external || module_procedure);
2384
2385 if (sym->backend_decl)
2386 return;
2387
2388 /* Set the line and filename. sym->declared_at seems to point to the
2389 last statement for subroutines, but it'll do for now. */
2390 gfc_set_backend_locus (&sym->declared_at);
2391
2392 /* Allow only one nesting level. Allow public declarations. */
2393 gcc_assert (current_function_decl == NULL_TREE
2394 || DECL_FILE_SCOPE_P (current_function_decl)
2395 || (TREE_CODE (DECL_CONTEXT (current_function_decl))
2396 == NAMESPACE_DECL));
2397
2398 type = gfc_get_function_type (sym);
2399 fndecl = build_decl (input_location,
2400 FUNCTION_DECL, gfc_sym_identifier (sym), type);
2401
2402 attr = sym->attr;
2403
2404 /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes;
2405 TREE_PUBLIC specifies whether a function is globally addressable (i.e.
2406 the opposite of declaring a function as static in C). */
2407 DECL_EXTERNAL (fndecl) = 0;
2408
2409 if (sym->attr.access == ACCESS_UNKNOWN && sym->module
2410 && (sym->ns->default_access == ACCESS_PRIVATE
2411 || (sym->ns->default_access == ACCESS_UNKNOWN
2412 && flag_module_private)))
2413 sym->attr.access = ACCESS_PRIVATE;
2414
2415 if (!current_function_decl
2416 && !sym->attr.entry_master && !sym->attr.is_main_program
2417 && (sym->attr.access != ACCESS_PRIVATE || sym->binding_label
2418 || sym->attr.public_used))
2419 TREE_PUBLIC (fndecl) = 1;
2420
2421 if (sym->attr.referenced || sym->attr.entry_master)
2422 TREE_USED (fndecl) = 1;
2423
2424 attributes = add_attributes_to_decl (attr, NULL_TREE);
2425 decl_attributes (&fndecl, attributes, 0);
2426
2427 /* Figure out the return type of the declared function, and build a
2428 RESULT_DECL for it. If this is a subroutine with alternate
2429 returns, build a RESULT_DECL for it. */
2430 result_decl = NULL_TREE;
2431 /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */
2432 if (attr.function)
2433 {
2434 if (gfc_return_by_reference (sym))
2435 type = void_type_node;
2436 else
2437 {
2438 if (sym->result != sym)
2439 result_decl = gfc_sym_identifier (sym->result);
2440
2441 type = TREE_TYPE (TREE_TYPE (fndecl));
2442 }
2443 }
2444 else
2445 {
2446 /* Look for alternate return placeholders. */
2447 int has_alternate_returns = 0;
2448 for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
2449 {
2450 if (f->sym == NULL)
2451 {
2452 has_alternate_returns = 1;
2453 break;
2454 }
2455 }
2456
2457 if (has_alternate_returns)
2458 type = integer_type_node;
2459 else
2460 type = void_type_node;
2461 }
2462
2463 result_decl = build_decl (input_location,
2464 RESULT_DECL, result_decl, type);
2465 DECL_ARTIFICIAL (result_decl) = 1;
2466 DECL_IGNORED_P (result_decl) = 1;
2467 DECL_CONTEXT (result_decl) = fndecl;
2468 DECL_RESULT (fndecl) = result_decl;
2469
2470 /* Don't call layout_decl for a RESULT_DECL.
2471 layout_decl (result_decl, 0); */
2472
2473 /* TREE_STATIC means the function body is defined here. */
2474 TREE_STATIC (fndecl) = 1;
2475
2476 /* Set attributes for PURE functions. A call to a PURE function in the
2477 Fortran 95 sense is both pure and without side effects in the C
2478 sense. */
2479 if (attr.pure || attr.implicit_pure)
2480 {
2481 /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments
2482 including an alternate return. In that case it can also be
2483 marked as PURE. See also in gfc_get_extern_function_decl(). */
2484 if (attr.function && !gfc_return_by_reference (sym))
2485 DECL_PURE_P (fndecl) = 1;
2486 TREE_SIDE_EFFECTS (fndecl) = 0;
2487 }
2488
2489 /* Mark noinline functions. */
2490 if (attr.ext_attr & (1 << EXT_ATTR_NOINLINE))
2491 DECL_UNINLINABLE (fndecl) = 1;
2492
2493 /* Mark noreturn functions. */
2494 if (attr.ext_attr & (1 << EXT_ATTR_NORETURN))
2495 TREE_THIS_VOLATILE (fndecl) = 1;
2496
2497 /* Mark weak functions. */
2498 if (attr.ext_attr & (1 << EXT_ATTR_WEAK))
2499 declare_weak (fndecl);
2500
2501 /* Layout the function declaration and put it in the binding level
2502 of the current function. */
2503
2504 if (global)
2505 pushdecl_top_level (fndecl);
2506 else
2507 pushdecl (fndecl);
2508
2509 /* Perform name mangling if this is a top level or module procedure. */
2510 if (current_function_decl == NULL_TREE)
2511 gfc_set_decl_assembler_name (fndecl, gfc_sym_mangled_function_id (sym));
2512
2513 sym->backend_decl = fndecl;
2514 }
2515
2516
2517 /* Create the DECL_ARGUMENTS for a procedure.
2518 NOTE: The arguments added here must match the argument type created by
2519 gfc_get_function_type (). */
2520
2521 static void
2522 create_function_arglist (gfc_symbol * sym)
2523 {
2524 tree fndecl;
2525 gfc_formal_arglist *f;
2526 tree typelist, hidden_typelist, optval_typelist;
2527 tree arglist, hidden_arglist, optval_arglist;
2528 tree type;
2529 tree parm;
2530
2531 fndecl = sym->backend_decl;
2532
2533 /* Build formal argument list. Make sure that their TREE_CONTEXT is
2534 the new FUNCTION_DECL node. */
2535 arglist = NULL_TREE;
2536 hidden_arglist = NULL_TREE;
2537 optval_arglist = NULL_TREE;
2538 typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
2539
2540 if (sym->attr.entry_master)
2541 {
2542 type = TREE_VALUE (typelist);
2543 parm = build_decl (input_location,
2544 PARM_DECL, get_identifier ("__entry"), type);
2545
2546 DECL_CONTEXT (parm) = fndecl;
2547 DECL_ARG_TYPE (parm) = type;
2548 TREE_READONLY (parm) = 1;
2549 gfc_finish_decl (parm);
2550 DECL_ARTIFICIAL (parm) = 1;
2551
2552 arglist = chainon (arglist, parm);
2553 typelist = TREE_CHAIN (typelist);
2554 }
2555
2556 if (gfc_return_by_reference (sym))
2557 {
2558 tree type = TREE_VALUE (typelist), length = NULL;
2559
2560 if (sym->ts.type == BT_CHARACTER)
2561 {
2562 /* Length of character result. */
2563 tree len_type = TREE_VALUE (TREE_CHAIN (typelist));
2564
2565 length = build_decl (input_location,
2566 PARM_DECL,
2567 get_identifier (".__result"),
2568 len_type);
2569 if (POINTER_TYPE_P (len_type))
2570 {
2571 sym->ts.u.cl->passed_length = length;
2572 TREE_USED (length) = 1;
2573 }
2574 else if (!sym->ts.u.cl->length)
2575 {
2576 sym->ts.u.cl->backend_decl = length;
2577 TREE_USED (length) = 1;
2578 }
2579 gcc_assert (TREE_CODE (length) == PARM_DECL);
2580 DECL_CONTEXT (length) = fndecl;
2581 DECL_ARG_TYPE (length) = len_type;
2582 TREE_READONLY (length) = 1;
2583 DECL_ARTIFICIAL (length) = 1;
2584 gfc_finish_decl (length);
2585 if (sym->ts.u.cl->backend_decl == NULL
2586 || sym->ts.u.cl->backend_decl == length)
2587 {
2588 gfc_symbol *arg;
2589 tree backend_decl;
2590
2591 if (sym->ts.u.cl->backend_decl == NULL)
2592 {
2593 tree len = build_decl (input_location,
2594 VAR_DECL,
2595 get_identifier ("..__result"),
2596 gfc_charlen_type_node);
2597 DECL_ARTIFICIAL (len) = 1;
2598 TREE_USED (len) = 1;
2599 sym->ts.u.cl->backend_decl = len;
2600 }
2601
2602 /* Make sure PARM_DECL type doesn't point to incomplete type. */
2603 arg = sym->result ? sym->result : sym;
2604 backend_decl = arg->backend_decl;
2605 /* Temporary clear it, so that gfc_sym_type creates complete
2606 type. */
2607 arg->backend_decl = NULL;
2608 type = gfc_sym_type (arg);
2609 arg->backend_decl = backend_decl;
2610 type = build_reference_type (type);
2611 }
2612 }
2613
2614 parm = build_decl (input_location,
2615 PARM_DECL, get_identifier ("__result"), type);
2616
2617 DECL_CONTEXT (parm) = fndecl;
2618 DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
2619 TREE_READONLY (parm) = 1;
2620 DECL_ARTIFICIAL (parm) = 1;
2621 gfc_finish_decl (parm);
2622
2623 arglist = chainon (arglist, parm);
2624 typelist = TREE_CHAIN (typelist);
2625
2626 if (sym->ts.type == BT_CHARACTER)
2627 {
2628 gfc_allocate_lang_decl (parm);
2629 arglist = chainon (arglist, length);
2630 typelist = TREE_CHAIN (typelist);
2631 }
2632 }
2633
2634 hidden_typelist = typelist;
2635 for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
2636 if (f->sym != NULL) /* Ignore alternate returns. */
2637 hidden_typelist = TREE_CHAIN (hidden_typelist);
2638
2639 /* Advance hidden_typelist over optional+value argument presence flags. */
2640 optval_typelist = hidden_typelist;
2641 for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
2642 if (f->sym != NULL
2643 && f->sym->attr.optional && f->sym->attr.value
2644 && !f->sym->attr.dimension && f->sym->ts.type != BT_CLASS
2645 && !gfc_bt_struct (f->sym->ts.type))
2646 hidden_typelist = TREE_CHAIN (hidden_typelist);
2647
2648 for (f = gfc_sym_get_dummy_args (sym); f; f = f->next)
2649 {
2650 char name[GFC_MAX_SYMBOL_LEN + 2];
2651
2652 /* Ignore alternate returns. */
2653 if (f->sym == NULL)
2654 continue;
2655
2656 type = TREE_VALUE (typelist);
2657
2658 if (f->sym->ts.type == BT_CHARACTER
2659 && (!sym->attr.is_bind_c || sym->attr.entry_master))
2660 {
2661 tree len_type = TREE_VALUE (hidden_typelist);
2662 tree length = NULL_TREE;
2663 if (!f->sym->ts.deferred)
2664 gcc_assert (len_type == gfc_charlen_type_node);
2665 else
2666 gcc_assert (POINTER_TYPE_P (len_type));
2667
2668 strcpy (&name[1], f->sym->name);
2669 name[0] = '_';
2670 length = build_decl (input_location,
2671 PARM_DECL, get_identifier (name), len_type);
2672
2673 hidden_arglist = chainon (hidden_arglist, length);
2674 DECL_CONTEXT (length) = fndecl;
2675 DECL_ARTIFICIAL (length) = 1;
2676 DECL_ARG_TYPE (length) = len_type;
2677 TREE_READONLY (length) = 1;
2678 gfc_finish_decl (length);
2679
2680 /* Marking the length DECL_HIDDEN_STRING_LENGTH will lead
2681 to tail calls being disabled. Only do that if we
2682 potentially have broken callers. */
2683 if (flag_tail_call_workaround
2684 && f->sym->ts.u.cl
2685 && f->sym->ts.u.cl->length
2686 && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT
2687 && (flag_tail_call_workaround == 2
2688 || f->sym->ns->implicit_interface_calls))
2689 DECL_HIDDEN_STRING_LENGTH (length) = 1;
2690
2691 /* Remember the passed value. */
2692 if (!f->sym->ts.u.cl || f->sym->ts.u.cl->passed_length)
2693 {
2694 /* This can happen if the same type is used for multiple
2695 arguments. We need to copy cl as otherwise
2696 cl->passed_length gets overwritten. */
2697 f->sym->ts.u.cl = gfc_new_charlen (f->sym->ns, f->sym->ts.u.cl);
2698 }
2699 f->sym->ts.u.cl->passed_length = length;
2700
2701 /* Use the passed value for assumed length variables. */
2702 if (!f->sym->ts.u.cl->length)
2703 {
2704 TREE_USED (length) = 1;
2705 gcc_assert (!f->sym->ts.u.cl->backend_decl);
2706 f->sym->ts.u.cl->backend_decl = length;
2707 }
2708
2709 hidden_typelist = TREE_CHAIN (hidden_typelist);
2710
2711 if (f->sym->ts.u.cl->backend_decl == NULL
2712 || f->sym->ts.u.cl->backend_decl == length)
2713 {
2714 if (POINTER_TYPE_P (len_type))
2715 f->sym->ts.u.cl->backend_decl
2716 = build_fold_indirect_ref_loc (input_location, length);
2717 else if (f->sym->ts.u.cl->backend_decl == NULL)
2718 gfc_create_string_length (f->sym);
2719
2720 /* Make sure PARM_DECL type doesn't point to incomplete type. */
2721 if (f->sym->attr.flavor == FL_PROCEDURE)
2722 type = build_pointer_type (gfc_get_function_type (f->sym));
2723 else
2724 type = gfc_sym_type (f->sym);
2725 }
2726 }
2727 /* For scalar intrinsic types, VALUE passes the value,
2728 hence, the optional status cannot be transferred via a NULL pointer.
2729 Thus, we will use a hidden argument in that case. */
2730 if (f->sym->attr.optional && f->sym->attr.value
2731 && !f->sym->attr.dimension && f->sym->ts.type != BT_CLASS
2732 && !gfc_bt_struct (f->sym->ts.type))
2733 {
2734 tree tmp;
2735 strcpy (&name[1], f->sym->name);
2736 name[0] = '.';
2737 tmp = build_decl (input_location,
2738 PARM_DECL, get_identifier (name),
2739 boolean_type_node);
2740
2741 optval_arglist = chainon (optval_arglist, tmp);
2742 DECL_CONTEXT (tmp) = fndecl;
2743 DECL_ARTIFICIAL (tmp) = 1;
2744 DECL_ARG_TYPE (tmp) = boolean_type_node;
2745 TREE_READONLY (tmp) = 1;
2746 gfc_finish_decl (tmp);
2747
2748 /* The presence flag must be boolean. */
2749 gcc_assert (TREE_VALUE (optval_typelist) == boolean_type_node);
2750 optval_typelist = TREE_CHAIN (optval_typelist);
2751 }
2752
2753 /* For non-constant length array arguments, make sure they use
2754 a different type node from TYPE_ARG_TYPES type. */
2755 if (f->sym->attr.dimension
2756 && type == TREE_VALUE (typelist)
2757 && TREE_CODE (type) == POINTER_TYPE
2758 && GFC_ARRAY_TYPE_P (type)
2759 && f->sym->as->type != AS_ASSUMED_SIZE
2760 && ! COMPLETE_TYPE_P (TREE_TYPE (type)))
2761 {
2762 if (f->sym->attr.flavor == FL_PROCEDURE)
2763 type = build_pointer_type (gfc_get_function_type (f->sym));
2764 else
2765 type = gfc_sym_type (f->sym);
2766 }
2767
2768 if (f->sym->attr.proc_pointer)
2769 type = build_pointer_type (type);
2770
2771 if (f->sym->attr.volatile_)
2772 type = build_qualified_type (type, TYPE_QUAL_VOLATILE);
2773
2774 /* Build the argument declaration. For C descriptors, we use a
2775 '_'-prefixed name for the parm_decl and inside the proc the
2776 sym->name. */
2777 tree parm_name;
2778 if (sym->attr.is_bind_c && is_CFI_desc (f->sym, NULL))
2779 {
2780 strcpy (&name[1], f->sym->name);
2781 name[0] = '_';
2782 parm_name = get_identifier (name);
2783 }
2784 else
2785 parm_name = gfc_sym_identifier (f->sym);
2786 parm = build_decl (input_location, PARM_DECL, parm_name, type);
2787
2788 if (f->sym->attr.volatile_)
2789 {
2790 TREE_THIS_VOLATILE (parm) = 1;
2791 TREE_SIDE_EFFECTS (parm) = 1;
2792 }
2793
2794 /* Fill in arg stuff. */
2795 DECL_CONTEXT (parm) = fndecl;
2796 DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
2797 /* All implementation args except for VALUE are read-only. */
2798 if (!f->sym->attr.value)
2799 TREE_READONLY (parm) = 1;
2800 if (POINTER_TYPE_P (type)
2801 && (!f->sym->attr.proc_pointer
2802 && f->sym->attr.flavor != FL_PROCEDURE))
2803 DECL_BY_REFERENCE (parm) = 1;
2804 if (f->sym->attr.optional)
2805 {
2806 gfc_allocate_lang_decl (parm);
2807 GFC_DECL_OPTIONAL_ARGUMENT (parm) = 1;
2808 }
2809
2810 gfc_finish_decl (parm);
2811 gfc_finish_decl_attrs (parm, &f->sym->attr);
2812
2813 f->sym->backend_decl = parm;
2814
2815 /* Coarrays which are descriptorless or assumed-shape pass with
2816 -fcoarray=lib the token and the offset as hidden arguments. */
2817 if (flag_coarray == GFC_FCOARRAY_LIB
2818 && ((f->sym->ts.type != BT_CLASS && f->sym->attr.codimension
2819 && !f->sym->attr.allocatable)
2820 || (f->sym->ts.type == BT_CLASS
2821 && CLASS_DATA (f->sym)->attr.codimension
2822 && !CLASS_DATA (f->sym)->attr.allocatable)))
2823 {
2824 tree caf_type;
2825 tree token;
2826 tree offset;
2827
2828 gcc_assert (f->sym->backend_decl != NULL_TREE
2829 && !sym->attr.is_bind_c);
2830 caf_type = f->sym->ts.type == BT_CLASS
2831 ? TREE_TYPE (CLASS_DATA (f->sym)->backend_decl)
2832 : TREE_TYPE (f->sym->backend_decl);
2833
2834 token = build_decl (input_location, PARM_DECL,
2835 create_tmp_var_name ("caf_token"),
2836 build_qualified_type (pvoid_type_node,
2837 TYPE_QUAL_RESTRICT));
2838 if ((f->sym->ts.type != BT_CLASS
2839 && f->sym->as->type != AS_DEFERRED)
2840 || (f->sym->ts.type == BT_CLASS
2841 && CLASS_DATA (f->sym)->as->type != AS_DEFERRED))
2842 {
2843 gcc_assert (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL
2844 || GFC_DECL_TOKEN (f->sym->backend_decl) == NULL_TREE);
2845 if (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL)
2846 gfc_allocate_lang_decl (f->sym->backend_decl);
2847 GFC_DECL_TOKEN (f->sym->backend_decl) = token;
2848 }
2849 else
2850 {
2851 gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) == NULL_TREE);
2852 GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) = token;
2853 }
2854
2855 DECL_CONTEXT (token) = fndecl;
2856 DECL_ARTIFICIAL (token) = 1;
2857 DECL_ARG_TYPE (token) = TREE_VALUE (typelist);
2858 TREE_READONLY (token) = 1;
2859 hidden_arglist = chainon (hidden_arglist, token);
2860 hidden_typelist = TREE_CHAIN (hidden_typelist);
2861 gfc_finish_decl (token);
2862
2863 offset = build_decl (input_location, PARM_DECL,
2864 create_tmp_var_name ("caf_offset"),
2865 gfc_array_index_type);
2866
2867 if ((f->sym->ts.type != BT_CLASS
2868 && f->sym->as->type != AS_DEFERRED)
2869 || (f->sym->ts.type == BT_CLASS
2870 && CLASS_DATA (f->sym)->as->type != AS_DEFERRED))
2871 {
2872 gcc_assert (GFC_DECL_CAF_OFFSET (f->sym->backend_decl)
2873 == NULL_TREE);
2874 GFC_DECL_CAF_OFFSET (f->sym->backend_decl) = offset;
2875 }
2876 else
2877 {
2878 gcc_assert (GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) == NULL_TREE);
2879 GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) = offset;
2880 }
2881 DECL_CONTEXT (offset) = fndecl;
2882 DECL_ARTIFICIAL (offset) = 1;
2883 DECL_ARG_TYPE (offset) = TREE_VALUE (typelist);
2884 TREE_READONLY (offset) = 1;
2885 hidden_arglist = chainon (hidden_arglist, offset);
2886 hidden_typelist = TREE_CHAIN (hidden_typelist);
2887 gfc_finish_decl (offset);
2888 }
2889
2890 arglist = chainon (arglist, parm);
2891 typelist = TREE_CHAIN (typelist);
2892 }
2893
2894 /* Add hidden present status for optional+value arguments. */
2895 arglist = chainon (arglist, optval_arglist);
2896
2897 /* Add the hidden string length parameters, unless the procedure
2898 is bind(C). */
2899 if (!sym->attr.is_bind_c)
2900 arglist = chainon (arglist, hidden_arglist);
2901
2902 gcc_assert (hidden_typelist == NULL_TREE
2903 || TREE_VALUE (hidden_typelist) == void_type_node);
2904 DECL_ARGUMENTS (fndecl) = arglist;
2905 }
2906
2907 /* Do the setup necessary before generating the body of a function. */
2908
2909 static void
2910 trans_function_start (gfc_symbol * sym)
2911 {
2912 tree fndecl;
2913
2914 fndecl = sym->backend_decl;
2915
2916 /* Let GCC know the current scope is this function. */
2917 current_function_decl = fndecl;
2918
2919 /* Let the world know what we're about to do. */
2920 announce_function (fndecl);
2921
2922 if (DECL_FILE_SCOPE_P (fndecl))
2923 {
2924 /* Create RTL for function declaration. */
2925 rest_of_decl_compilation (fndecl, 1, 0);
2926 }
2927
2928 /* Create RTL for function definition. */
2929 make_decl_rtl (fndecl);
2930
2931 allocate_struct_function (fndecl, false);
2932
2933 /* function.cc requires a push at the start of the function. */
2934 pushlevel ();
2935 }
2936
2937 /* Create thunks for alternate entry points. */
2938
2939 static void
2940 build_entry_thunks (gfc_namespace * ns, bool global)
2941 {
2942 gfc_formal_arglist *formal;
2943 gfc_formal_arglist *thunk_formal;
2944 gfc_entry_list *el;
2945 gfc_symbol *thunk_sym;
2946 stmtblock_t body;
2947 tree thunk_fndecl;
2948 tree tmp;
2949 locus old_loc;
2950
2951 /* This should always be a toplevel function. */
2952 gcc_assert (current_function_decl == NULL_TREE);
2953
2954 gfc_save_backend_locus (&old_loc);
2955 for (el = ns->entries; el; el = el->next)
2956 {
2957 vec<tree, va_gc> *args = NULL;
2958 vec<tree, va_gc> *string_args = NULL;
2959
2960 thunk_sym = el->sym;
2961
2962 build_function_decl (thunk_sym, global);
2963 create_function_arglist (thunk_sym);
2964
2965 trans_function_start (thunk_sym);
2966
2967 thunk_fndecl = thunk_sym->backend_decl;
2968
2969 gfc_init_block (&body);
2970
2971 /* Pass extra parameter identifying this entry point. */
2972 tmp = build_int_cst (gfc_array_index_type, el->id);
2973 vec_safe_push (args, tmp);
2974
2975 if (thunk_sym->attr.function)
2976 {
2977 if (gfc_return_by_reference (ns->proc_name))
2978 {
2979 tree ref = DECL_ARGUMENTS (current_function_decl);
2980 vec_safe_push (args, ref);
2981 if (ns->proc_name->ts.type == BT_CHARACTER)
2982 vec_safe_push (args, DECL_CHAIN (ref));
2983 }
2984 }
2985
2986 for (formal = gfc_sym_get_dummy_args (ns->proc_name); formal;
2987 formal = formal->next)
2988 {
2989 /* Ignore alternate returns. */
2990 if (formal->sym == NULL)
2991 continue;
2992
2993 /* We don't have a clever way of identifying arguments, so resort to
2994 a brute-force search. */
2995 for (thunk_formal = gfc_sym_get_dummy_args (thunk_sym);
2996 thunk_formal;
2997 thunk_formal = thunk_formal->next)
2998 {
2999 if (thunk_formal->sym == formal->sym)
3000 break;
3001 }
3002
3003 if (thunk_formal)
3004 {
3005 /* Pass the argument. */
3006 DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1;
3007 vec_safe_push (args, thunk_formal->sym->backend_decl);
3008 if (formal->sym->ts.type == BT_CHARACTER)
3009 {
3010 tmp = thunk_formal->sym->ts.u.cl->backend_decl;
3011 vec_safe_push (string_args, tmp);
3012 }
3013 }
3014 else
3015 {
3016 /* Pass NULL for a missing argument. */
3017 vec_safe_push (args, null_pointer_node);
3018 if (formal->sym->ts.type == BT_CHARACTER)
3019 {
3020 tmp = build_int_cst (gfc_charlen_type_node, 0);
3021 vec_safe_push (string_args, tmp);
3022 }
3023 }
3024 }
3025
3026 /* Call the master function. */
3027 vec_safe_splice (args, string_args);
3028 tmp = ns->proc_name->backend_decl;
3029 tmp = build_call_expr_loc_vec (input_location, tmp, args);
3030 if (ns->proc_name->attr.mixed_entry_master)
3031 {
3032 tree union_decl, field;
3033 tree master_type = TREE_TYPE (ns->proc_name->backend_decl);
3034
3035 union_decl = build_decl (input_location,
3036 VAR_DECL, get_identifier ("__result"),
3037 TREE_TYPE (master_type));
3038 DECL_ARTIFICIAL (union_decl) = 1;
3039 DECL_EXTERNAL (union_decl) = 0;
3040 TREE_PUBLIC (union_decl) = 0;
3041 TREE_USED (union_decl) = 1;
3042 layout_decl (union_decl, 0);
3043 pushdecl (union_decl);
3044
3045 DECL_CONTEXT (union_decl) = current_function_decl;
3046 tmp = fold_build2_loc (input_location, MODIFY_EXPR,
3047 TREE_TYPE (union_decl), union_decl, tmp);
3048 gfc_add_expr_to_block (&body, tmp);
3049
3050 for (field = TYPE_FIELDS (TREE_TYPE (union_decl));
3051 field; field = DECL_CHAIN (field))
3052 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
3053 thunk_sym->result->name) == 0)
3054 break;
3055 gcc_assert (field != NULL_TREE);
3056 tmp = fold_build3_loc (input_location, COMPONENT_REF,
3057 TREE_TYPE (field), union_decl, field,
3058 NULL_TREE);
3059 tmp = fold_build2_loc (input_location, MODIFY_EXPR,
3060 TREE_TYPE (DECL_RESULT (current_function_decl)),
3061 DECL_RESULT (current_function_decl), tmp);
3062 tmp = build1_v (RETURN_EXPR, tmp);
3063 }
3064 else if (TREE_TYPE (DECL_RESULT (current_function_decl))
3065 != void_type_node)
3066 {
3067 tmp = fold_build2_loc (input_location, MODIFY_EXPR,
3068 TREE_TYPE (DECL_RESULT (current_function_decl)),
3069 DECL_RESULT (current_function_decl), tmp);
3070 tmp = build1_v (RETURN_EXPR, tmp);
3071 }
3072 gfc_add_expr_to_block (&body, tmp);
3073
3074 /* Finish off this function and send it for code generation. */
3075 DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body);
3076 tmp = getdecls ();
3077 poplevel (1, 1);
3078 BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl;
3079 DECL_SAVED_TREE (thunk_fndecl)
3080 = fold_build3_loc (DECL_SOURCE_LOCATION (thunk_fndecl), BIND_EXPR,
3081 void_type_node, tmp, DECL_SAVED_TREE (thunk_fndecl),
3082 DECL_INITIAL (thunk_fndecl));
3083
3084 /* Output the GENERIC tree. */
3085 dump_function (TDI_original, thunk_fndecl);
3086
3087 /* Store the end of the function, so that we get good line number
3088 info for the epilogue. */
3089 cfun->function_end_locus = input_location;
3090
3091 /* We're leaving the context of this function, so zap cfun.
3092 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
3093 tree_rest_of_compilation. */
3094 set_cfun (NULL);
3095
3096 current_function_decl = NULL_TREE;
3097
3098 cgraph_node::finalize_function (thunk_fndecl, true);
3099
3100 /* We share the symbols in the formal argument list with other entry
3101 points and the master function. Clear them so that they are
3102 recreated for each function. */
3103 for (formal = gfc_sym_get_dummy_args (thunk_sym); formal;
3104 formal = formal->next)
3105 if (formal->sym != NULL) /* Ignore alternate returns. */
3106 {
3107 formal->sym->backend_decl = NULL_TREE;
3108 if (formal->sym->ts.type == BT_CHARACTER)
3109 formal->sym->ts.u.cl->backend_decl = NULL_TREE;
3110 }
3111
3112 if (thunk_sym->attr.function)
3113 {
3114 if (thunk_sym->ts.type == BT_CHARACTER)
3115 thunk_sym->ts.u.cl->backend_decl = NULL_TREE;
3116 if (thunk_sym->result->ts.type == BT_CHARACTER)
3117 thunk_sym->result->ts.u.cl->backend_decl = NULL_TREE;
3118 }
3119 }
3120
3121 gfc_restore_backend_locus (&old_loc);
3122 }
3123
3124
3125 /* Create a decl for a function, and create any thunks for alternate entry
3126 points. If global is true, generate the function in the global binding
3127 level, otherwise in the current binding level (which can be global). */
3128
3129 void
3130 gfc_create_function_decl (gfc_namespace * ns, bool global)
3131 {
3132 /* Create a declaration for the master function. */
3133 build_function_decl (ns->proc_name, global);
3134
3135 /* Compile the entry thunks. */
3136 if (ns->entries)
3137 build_entry_thunks (ns, global);
3138
3139 /* Now create the read argument list. */
3140 create_function_arglist (ns->proc_name);
3141
3142 if (ns->omp_declare_simd)
3143 gfc_trans_omp_declare_simd (ns);
3144
3145 /* Handle 'declare variant' directives. The applicable directives might
3146 be declared in a parent namespace, so this needs to be called even if
3147 there are no local directives. */
3148 if (flag_openmp)
3149 gfc_trans_omp_declare_variant (ns);
3150 }
3151
3152 /* Return the decl used to hold the function return value. If
3153 parent_flag is set, the context is the parent_scope. */
3154
3155 tree
3156 gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag)
3157 {
3158 tree decl;
3159 tree length;
3160 tree this_fake_result_decl;
3161 tree this_function_decl;
3162
3163 char name[GFC_MAX_SYMBOL_LEN + 10];
3164
3165 if (parent_flag)
3166 {
3167 this_fake_result_decl = parent_fake_result_decl;
3168 this_function_decl = DECL_CONTEXT (current_function_decl);
3169 }
3170 else
3171 {
3172 this_fake_result_decl = current_fake_result_decl;
3173 this_function_decl = current_function_decl;
3174 }
3175
3176 if (sym
3177 && sym->ns->proc_name->backend_decl == this_function_decl
3178 && sym->ns->proc_name->attr.entry_master
3179 && sym != sym->ns->proc_name)
3180 {
3181 tree t = NULL, var;
3182 if (this_fake_result_decl != NULL)
3183 for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t))
3184 if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0)
3185 break;
3186 if (t)
3187 return TREE_VALUE (t);
3188 decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag);
3189
3190 if (parent_flag)
3191 this_fake_result_decl = parent_fake_result_decl;
3192 else
3193 this_fake_result_decl = current_fake_result_decl;
3194
3195 if (decl && sym->ns->proc_name->attr.mixed_entry_master)
3196 {
3197 tree field;
3198
3199 for (field = TYPE_FIELDS (TREE_TYPE (decl));
3200 field; field = DECL_CHAIN (field))
3201 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
3202 sym->name) == 0)
3203 break;
3204
3205 gcc_assert (field != NULL_TREE);
3206 decl = fold_build3_loc (input_location, COMPONENT_REF,
3207 TREE_TYPE (field), decl, field, NULL_TREE);
3208 }
3209
3210 var = create_tmp_var_raw (TREE_TYPE (decl), sym->name);
3211 if (parent_flag)
3212 gfc_add_decl_to_parent_function (var);
3213 else
3214 gfc_add_decl_to_function (var);
3215
3216 SET_DECL_VALUE_EXPR (var, decl);
3217 DECL_HAS_VALUE_EXPR_P (var) = 1;
3218 GFC_DECL_RESULT (var) = 1;
3219
3220 TREE_CHAIN (this_fake_result_decl)
3221 = tree_cons (get_identifier (sym->name), var,
3222 TREE_CHAIN (this_fake_result_decl));
3223 return var;
3224 }
3225
3226 if (this_fake_result_decl != NULL_TREE)
3227 return TREE_VALUE (this_fake_result_decl);
3228
3229 /* Only when gfc_get_fake_result_decl is called by gfc_trans_return,
3230 sym is NULL. */
3231 if (!sym)
3232 return NULL_TREE;
3233
3234 if (sym->ts.type == BT_CHARACTER)
3235 {
3236 if (sym->ts.u.cl->backend_decl == NULL_TREE)
3237 length = gfc_create_string_length (sym);
3238 else
3239 length = sym->ts.u.cl->backend_decl;
3240 if (VAR_P (length) && DECL_CONTEXT (length) == NULL_TREE)
3241 gfc_add_decl_to_function (length);
3242 }
3243
3244 if (gfc_return_by_reference (sym))
3245 {
3246 decl = DECL_ARGUMENTS (this_function_decl);
3247
3248 if (sym->ns->proc_name->backend_decl == this_function_decl
3249 && sym->ns->proc_name->attr.entry_master)
3250 decl = DECL_CHAIN (decl);
3251
3252 TREE_USED (decl) = 1;
3253 if (sym->as)
3254 decl = gfc_build_dummy_array_decl (sym, decl);
3255 }
3256 else
3257 {
3258 sprintf (name, "__result_%.20s",
3259 IDENTIFIER_POINTER (DECL_NAME (this_function_decl)));
3260
3261 if (!sym->attr.mixed_entry_master && sym->attr.function)
3262 decl = build_decl (DECL_SOURCE_LOCATION (this_function_decl),
3263 VAR_DECL, get_identifier (name),
3264 gfc_sym_type (sym));
3265 else
3266 decl = build_decl (DECL_SOURCE_LOCATION (this_function_decl),
3267 VAR_DECL, get_identifier (name),
3268 TREE_TYPE (TREE_TYPE (this_function_decl)));
3269 DECL_ARTIFICIAL (decl) = 1;
3270 DECL_EXTERNAL (decl) = 0;
3271 TREE_PUBLIC (decl) = 0;
3272 TREE_USED (decl) = 1;
3273 GFC_DECL_RESULT (decl) = 1;
3274 TREE_ADDRESSABLE (decl) = 1;
3275
3276 layout_decl (decl, 0);
3277 gfc_finish_decl_attrs (decl, &sym->attr);
3278
3279 if (parent_flag)
3280 gfc_add_decl_to_parent_function (decl);
3281 else
3282 gfc_add_decl_to_function (decl);
3283 }
3284
3285 if (parent_flag)
3286 parent_fake_result_decl = build_tree_list (NULL, decl);
3287 else
3288 current_fake_result_decl = build_tree_list (NULL, decl);
3289
3290 if (sym->attr.assign)
3291 DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (sym->backend_decl);
3292
3293 return decl;
3294 }
3295
3296
3297 /* Builds a function decl. The remaining parameters are the types of the
3298 function arguments. Negative nargs indicates a varargs function. */
3299
3300 static tree
3301 build_library_function_decl_1 (tree name, const char *spec,
3302 tree rettype, int nargs, va_list p)
3303 {
3304 vec<tree, va_gc> *arglist;
3305 tree fntype;
3306 tree fndecl;
3307 int n;
3308
3309 /* Library functions must be declared with global scope. */
3310 gcc_assert (current_function_decl == NULL_TREE);
3311
3312 /* Create a list of the argument types. */
3313 vec_alloc (arglist, abs (nargs));
3314 for (n = abs (nargs); n > 0; n--)
3315 {
3316 tree argtype = va_arg (p, tree);
3317 arglist->quick_push (argtype);
3318 }
3319
3320 /* Build the function type and decl. */
3321 if (nargs >= 0)
3322 fntype = build_function_type_vec (rettype, arglist);
3323 else
3324 fntype = build_varargs_function_type_vec (rettype, arglist);
3325 if (spec)
3326 {
3327 tree attr_args = build_tree_list (NULL_TREE,
3328 build_string (strlen (spec), spec));
3329 tree attrs = tree_cons (get_identifier ("fn spec"),
3330 attr_args, TYPE_ATTRIBUTES (fntype));
3331 fntype = build_type_attribute_variant (fntype, attrs);
3332 }
3333 fndecl = build_decl (input_location,
3334 FUNCTION_DECL, name, fntype);
3335
3336 /* Mark this decl as external. */
3337 DECL_EXTERNAL (fndecl) = 1;
3338 TREE_PUBLIC (fndecl) = 1;
3339
3340 pushdecl (fndecl);
3341
3342 rest_of_decl_compilation (fndecl, 1, 0);
3343
3344 return fndecl;
3345 }
3346
3347 /* Builds a function decl. The remaining parameters are the types of the
3348 function arguments. Negative nargs indicates a varargs function. */
3349
3350 tree
3351 gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...)
3352 {
3353 tree ret;
3354 va_list args;
3355 va_start (args, nargs);
3356 ret = build_library_function_decl_1 (name, NULL, rettype, nargs, args);
3357 va_end (args);
3358 return ret;
3359 }
3360
3361 /* Builds a function decl. The remaining parameters are the types of the
3362 function arguments. Negative nargs indicates a varargs function.
3363 The SPEC parameter specifies the function argument and return type
3364 specification according to the fnspec function type attribute. */
3365
3366 tree
3367 gfc_build_library_function_decl_with_spec (tree name, const char *spec,
3368 tree rettype, int nargs, ...)
3369 {
3370 tree ret;
3371 va_list args;
3372 va_start (args, nargs);
3373 if (flag_checking)
3374 {
3375 attr_fnspec fnspec (spec, strlen (spec));
3376 fnspec.verify ();
3377 }
3378 ret = build_library_function_decl_1 (name, spec, rettype, nargs, args);
3379 va_end (args);
3380 return ret;
3381 }
3382
3383 static void
3384 gfc_build_intrinsic_function_decls (void)
3385 {
3386 tree gfc_int4_type_node = gfc_get_int_type (4);
3387 tree gfc_pint4_type_node = build_pointer_type (gfc_int4_type_node);
3388 tree gfc_int8_type_node = gfc_get_int_type (8);
3389 tree gfc_pint8_type_node = build_pointer_type (gfc_int8_type_node);
3390 tree gfc_int16_type_node = gfc_get_int_type (16);
3391 tree gfc_logical4_type_node = gfc_get_logical_type (4);
3392 tree pchar1_type_node = gfc_get_pchar_type (1);
3393 tree pchar4_type_node = gfc_get_pchar_type (4);
3394
3395 /* String functions. */
3396 gfor_fndecl_compare_string = gfc_build_library_function_decl_with_spec (
3397 get_identifier (PREFIX("compare_string")), ". . R . R ",
3398 integer_type_node, 4, gfc_charlen_type_node, pchar1_type_node,
3399 gfc_charlen_type_node, pchar1_type_node);
3400 DECL_PURE_P (gfor_fndecl_compare_string) = 1;
3401 TREE_NOTHROW (gfor_fndecl_compare_string) = 1;
3402
3403 gfor_fndecl_concat_string = gfc_build_library_function_decl_with_spec (
3404 get_identifier (PREFIX("concat_string")), ". . W . R . R ",
3405 void_type_node, 6, gfc_charlen_type_node, pchar1_type_node,
3406 gfc_charlen_type_node, pchar1_type_node,
3407 gfc_charlen_type_node, pchar1_type_node);
3408 TREE_NOTHROW (gfor_fndecl_concat_string) = 1;
3409
3410 gfor_fndecl_string_len_trim = gfc_build_library_function_decl_with_spec (
3411 get_identifier (PREFIX("string_len_trim")), ". . R ",
3412 gfc_charlen_type_node, 2, gfc_charlen_type_node, pchar1_type_node);
3413 DECL_PURE_P (gfor_fndecl_string_len_trim) = 1;
3414 TREE_NOTHROW (gfor_fndecl_string_len_trim) = 1;
3415
3416 gfor_fndecl_string_index = gfc_build_library_function_decl_with_spec (
3417 get_identifier (PREFIX("string_index")), ". . R . R . ",
3418 gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node,
3419 gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node);
3420 DECL_PURE_P (gfor_fndecl_string_index) = 1;
3421 TREE_NOTHROW (gfor_fndecl_string_index) = 1;
3422
3423 gfor_fndecl_string_scan = gfc_build_library_function_decl_with_spec (
3424 get_identifier (PREFIX("string_scan")), ". . R . R . ",
3425 gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node,
3426 gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node);
3427 DECL_PURE_P (gfor_fndecl_string_scan) = 1;
3428 TREE_NOTHROW (gfor_fndecl_string_scan) = 1;
3429
3430 gfor_fndecl_string_verify = gfc_build_library_function_decl_with_spec (
3431 get_identifier (PREFIX("string_verify")), ". . R . R . ",
3432 gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node,
3433 gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node);
3434 DECL_PURE_P (gfor_fndecl_string_verify) = 1;
3435 TREE_NOTHROW (gfor_fndecl_string_verify) = 1;
3436
3437 gfor_fndecl_string_trim = gfc_build_library_function_decl_with_spec (
3438 get_identifier (PREFIX("string_trim")), ". W w . R ",
3439 void_type_node, 4, build_pointer_type (gfc_charlen_type_node),
3440 build_pointer_type (pchar1_type_node), gfc_charlen_type_node,
3441 pchar1_type_node);
3442
3443 gfor_fndecl_string_minmax = gfc_build_library_function_decl_with_spec (
3444 get_identifier (PREFIX("string_minmax")), ". W w . R ",
3445 void_type_node, -4, build_pointer_type (gfc_charlen_type_node),
3446 build_pointer_type (pchar1_type_node), integer_type_node,
3447 integer_type_node);
3448
3449 gfor_fndecl_adjustl = gfc_build_library_function_decl_with_spec (
3450 get_identifier (PREFIX("adjustl")), ". W . R ",
3451 void_type_node, 3, pchar1_type_node, gfc_charlen_type_node,
3452 pchar1_type_node);
3453 TREE_NOTHROW (gfor_fndecl_adjustl) = 1;
3454
3455 gfor_fndecl_adjustr = gfc_build_library_function_decl_with_spec (
3456 get_identifier (PREFIX("adjustr")), ". W . R ",
3457 void_type_node, 3, pchar1_type_node, gfc_charlen_type_node,
3458 pchar1_type_node);
3459 TREE_NOTHROW (gfor_fndecl_adjustr) = 1;
3460
3461 gfor_fndecl_select_string = gfc_build_library_function_decl_with_spec (
3462 get_identifier (PREFIX("select_string")), ". R . R . ",
3463 integer_type_node, 4, pvoid_type_node, integer_type_node,
3464 pchar1_type_node, gfc_charlen_type_node);
3465 DECL_PURE_P (gfor_fndecl_select_string) = 1;
3466 TREE_NOTHROW (gfor_fndecl_select_string) = 1;
3467
3468 gfor_fndecl_compare_string_char4 = gfc_build_library_function_decl_with_spec (
3469 get_identifier (PREFIX("compare_string_char4")), ". . R . R ",
3470 integer_type_node, 4, gfc_charlen_type_node, pchar4_type_node,
3471 gfc_charlen_type_node, pchar4_type_node);
3472 DECL_PURE_P (gfor_fndecl_compare_string_char4) = 1;
3473 TREE_NOTHROW (gfor_fndecl_compare_string_char4) = 1;
3474
3475 gfor_fndecl_concat_string_char4 = gfc_build_library_function_decl_with_spec (
3476 get_identifier (PREFIX("concat_string_char4")), ". . W . R . R ",
3477 void_type_node, 6, gfc_charlen_type_node, pchar4_type_node,
3478 gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node,
3479 pchar4_type_node);
3480 TREE_NOTHROW (gfor_fndecl_concat_string_char4) = 1;
3481
3482 gfor_fndecl_string_len_trim_char4 = gfc_build_library_function_decl_with_spec (
3483 get_identifier (PREFIX("string_len_trim_char4")), ". . R ",
3484 gfc_charlen_type_node, 2, gfc_charlen_type_node, pchar4_type_node);
3485 DECL_PURE_P (gfor_fndecl_string_len_trim_char4) = 1;
3486 TREE_NOTHROW (gfor_fndecl_string_len_trim_char4) = 1;
3487
3488 gfor_fndecl_string_index_char4 = gfc_build_library_function_decl_with_spec (
3489 get_identifier (PREFIX("string_index_char4")), ". . R . R . ",
3490 gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node,
3491 gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node);
3492 DECL_PURE_P (gfor_fndecl_string_index_char4) = 1;
3493 TREE_NOTHROW (gfor_fndecl_string_index_char4) = 1;
3494
3495 gfor_fndecl_string_scan_char4 = gfc_build_library_function_decl_with_spec (
3496 get_identifier (PREFIX("string_scan_char4")), ". . R . R . ",
3497 gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node,
3498 gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node);
3499 DECL_PURE_P (gfor_fndecl_string_scan_char4) = 1;
3500 TREE_NOTHROW (gfor_fndecl_string_scan_char4) = 1;
3501
3502 gfor_fndecl_string_verify_char4 = gfc_build_library_function_decl_with_spec (
3503 get_identifier (PREFIX("string_verify_char4")), ". . R . R . ",
3504 gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node,
3505 gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node);
3506 DECL_PURE_P (gfor_fndecl_string_verify_char4) = 1;
3507 TREE_NOTHROW (gfor_fndecl_string_verify_char4) = 1;
3508
3509 gfor_fndecl_string_trim_char4 = gfc_build_library_function_decl_with_spec (
3510 get_identifier (PREFIX("string_trim_char4")), ". W w . R ",
3511 void_type_node, 4, build_pointer_type (gfc_charlen_type_node),
3512 build_pointer_type (pchar4_type_node), gfc_charlen_type_node,
3513 pchar4_type_node);
3514
3515 gfor_fndecl_string_minmax_char4 = gfc_build_library_function_decl_with_spec (
3516 get_identifier (PREFIX("string_minmax_char4")), ". W w . R ",
3517 void_type_node, -4, build_pointer_type (gfc_charlen_type_node),
3518 build_pointer_type (pchar4_type_node), integer_type_node,
3519 integer_type_node);
3520
3521 gfor_fndecl_adjustl_char4 = gfc_build_library_function_decl_with_spec (
3522 get_identifier (PREFIX("adjustl_char4")), ". W . R ",
3523 void_type_node, 3, pchar4_type_node, gfc_charlen_type_node,
3524 pchar4_type_node);
3525 TREE_NOTHROW (gfor_fndecl_adjustl_char4) = 1;
3526
3527 gfor_fndecl_adjustr_char4 = gfc_build_library_function_decl_with_spec (
3528 get_identifier (PREFIX("adjustr_char4")), ". W . R ",
3529 void_type_node, 3, pchar4_type_node, gfc_charlen_type_node,
3530 pchar4_type_node);
3531 TREE_NOTHROW (gfor_fndecl_adjustr_char4) = 1;
3532
3533 gfor_fndecl_select_string_char4 = gfc_build_library_function_decl_with_spec (
3534 get_identifier (PREFIX("select_string_char4")), ". R . R . ",
3535 integer_type_node, 4, pvoid_type_node, integer_type_node,
3536 pvoid_type_node, gfc_charlen_type_node);
3537 DECL_PURE_P (gfor_fndecl_select_string_char4) = 1;
3538 TREE_NOTHROW (gfor_fndecl_select_string_char4) = 1;
3539
3540
3541 /* Conversion between character kinds. */
3542
3543 gfor_fndecl_convert_char1_to_char4 = gfc_build_library_function_decl_with_spec (
3544 get_identifier (PREFIX("convert_char1_to_char4")), ". w . R ",
3545 void_type_node, 3, build_pointer_type (pchar4_type_node),
3546 gfc_charlen_type_node, pchar1_type_node);
3547
3548 gfor_fndecl_convert_char4_to_char1 = gfc_build_library_function_decl_with_spec (
3549 get_identifier (PREFIX("convert_char4_to_char1")), ". w . R ",
3550 void_type_node, 3, build_pointer_type (pchar1_type_node),
3551 gfc_charlen_type_node, pchar4_type_node);
3552
3553 /* Misc. functions. */
3554
3555 gfor_fndecl_ttynam = gfc_build_library_function_decl_with_spec (
3556 get_identifier (PREFIX("ttynam")), ". W . . ",
3557 void_type_node, 3, pchar_type_node, gfc_charlen_type_node,
3558 integer_type_node);
3559
3560 gfor_fndecl_fdate = gfc_build_library_function_decl_with_spec (
3561 get_identifier (PREFIX("fdate")), ". W . ",
3562 void_type_node, 2, pchar_type_node, gfc_charlen_type_node);
3563
3564 gfor_fndecl_ctime = gfc_build_library_function_decl_with_spec (
3565 get_identifier (PREFIX("ctime")), ". W . . ",
3566 void_type_node, 3, pchar_type_node, gfc_charlen_type_node,
3567 gfc_int8_type_node);
3568
3569 gfor_fndecl_random_init = gfc_build_library_function_decl (
3570 get_identifier (PREFIX("random_init")),
3571 void_type_node, 3, gfc_logical4_type_node, gfc_logical4_type_node,
3572 gfc_int4_type_node);
3573
3574 // gfor_fndecl_caf_rand_init is defined in the lib-coarray section below.
3575
3576 gfor_fndecl_sc_kind = gfc_build_library_function_decl_with_spec (
3577 get_identifier (PREFIX("selected_char_kind")), ". . R ",
3578 gfc_int4_type_node, 2, gfc_charlen_type_node, pchar_type_node);
3579 DECL_PURE_P (gfor_fndecl_sc_kind) = 1;
3580 TREE_NOTHROW (gfor_fndecl_sc_kind) = 1;
3581
3582 gfor_fndecl_si_kind = gfc_build_library_function_decl_with_spec (
3583 get_identifier (PREFIX("selected_int_kind")), ". R ",
3584 gfc_int4_type_node, 1, pvoid_type_node);
3585 DECL_PURE_P (gfor_fndecl_si_kind) = 1;
3586 TREE_NOTHROW (gfor_fndecl_si_kind) = 1;
3587
3588 gfor_fndecl_sr_kind = gfc_build_library_function_decl_with_spec (
3589 get_identifier (PREFIX("selected_real_kind2008")), ". R R ",
3590 gfc_int4_type_node, 3, pvoid_type_node, pvoid_type_node,
3591 pvoid_type_node);
3592 DECL_PURE_P (gfor_fndecl_sr_kind) = 1;
3593 TREE_NOTHROW (gfor_fndecl_sr_kind) = 1;
3594
3595 gfor_fndecl_system_clock4 = gfc_build_library_function_decl (
3596 get_identifier (PREFIX("system_clock_4")),
3597 void_type_node, 3, gfc_pint4_type_node, gfc_pint4_type_node,
3598 gfc_pint4_type_node);
3599
3600 gfor_fndecl_system_clock8 = gfc_build_library_function_decl (
3601 get_identifier (PREFIX("system_clock_8")),
3602 void_type_node, 3, gfc_pint8_type_node, gfc_pint8_type_node,
3603 gfc_pint8_type_node);
3604
3605 /* Power functions. */
3606 {
3607 tree ctype, rtype, itype, jtype;
3608 int rkind, ikind, jkind;
3609 #define NIKINDS 3
3610 #define NRKINDS 4
3611 static int ikinds[NIKINDS] = {4, 8, 16};
3612 static int rkinds[NRKINDS] = {4, 8, 10, 16};
3613 char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */
3614
3615 for (ikind=0; ikind < NIKINDS; ikind++)
3616 {
3617 itype = gfc_get_int_type (ikinds[ikind]);
3618
3619 for (jkind=0; jkind < NIKINDS; jkind++)
3620 {
3621 jtype = gfc_get_int_type (ikinds[jkind]);
3622 if (itype && jtype)
3623 {
3624 sprintf (name, PREFIX("pow_i%d_i%d"), ikinds[ikind],
3625 ikinds[jkind]);
3626 gfor_fndecl_math_powi[jkind][ikind].integer =
3627 gfc_build_library_function_decl (get_identifier (name),
3628 jtype, 2, jtype, itype);
3629 TREE_READONLY (gfor_fndecl_math_powi[jkind][ikind].integer) = 1;
3630 TREE_NOTHROW (gfor_fndecl_math_powi[jkind][ikind].integer) = 1;
3631 }
3632 }
3633
3634 for (rkind = 0; rkind < NRKINDS; rkind ++)
3635 {
3636 rtype = gfc_get_real_type (rkinds[rkind]);
3637 if (rtype && itype)
3638 {
3639 sprintf (name, PREFIX("pow_r%d_i%d"),
3640 gfc_type_abi_kind (BT_REAL, rkinds[rkind]),
3641 ikinds[ikind]);
3642 gfor_fndecl_math_powi[rkind][ikind].real =
3643 gfc_build_library_function_decl (get_identifier (name),
3644 rtype, 2, rtype, itype);
3645 TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].real) = 1;
3646 TREE_NOTHROW (gfor_fndecl_math_powi[rkind][ikind].real) = 1;
3647 }
3648
3649 ctype = gfc_get_complex_type (rkinds[rkind]);
3650 if (ctype && itype)
3651 {
3652 sprintf (name, PREFIX("pow_c%d_i%d"),
3653 gfc_type_abi_kind (BT_REAL, rkinds[rkind]),
3654 ikinds[ikind]);
3655 gfor_fndecl_math_powi[rkind][ikind].cmplx =
3656 gfc_build_library_function_decl (get_identifier (name),
3657 ctype, 2,ctype, itype);
3658 TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1;
3659 TREE_NOTHROW (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1;
3660 }
3661 }
3662 }
3663 #undef NIKINDS
3664 #undef NRKINDS
3665 }
3666
3667 gfor_fndecl_math_ishftc4 = gfc_build_library_function_decl (
3668 get_identifier (PREFIX("ishftc4")),
3669 gfc_int4_type_node, 3, gfc_int4_type_node, gfc_int4_type_node,
3670 gfc_int4_type_node);
3671 TREE_READONLY (gfor_fndecl_math_ishftc4) = 1;
3672 TREE_NOTHROW (gfor_fndecl_math_ishftc4) = 1;
3673
3674 gfor_fndecl_math_ishftc8 = gfc_build_library_function_decl (
3675 get_identifier (PREFIX("ishftc8")),
3676 gfc_int8_type_node, 3, gfc_int8_type_node, gfc_int4_type_node,
3677 gfc_int4_type_node);
3678 TREE_READONLY (gfor_fndecl_math_ishftc8) = 1;
3679 TREE_NOTHROW (gfor_fndecl_math_ishftc8) = 1;
3680
3681 if (gfc_int16_type_node)
3682 {
3683 gfor_fndecl_math_ishftc16 = gfc_build_library_function_decl (
3684 get_identifier (PREFIX("ishftc16")),
3685 gfc_int16_type_node, 3, gfc_int16_type_node, gfc_int4_type_node,
3686 gfc_int4_type_node);
3687 TREE_READONLY (gfor_fndecl_math_ishftc16) = 1;
3688 TREE_NOTHROW (gfor_fndecl_math_ishftc16) = 1;
3689 }
3690
3691 /* BLAS functions. */
3692 {
3693 tree pint = build_pointer_type (integer_type_node);
3694 tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind));
3695 tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind));
3696 tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind));
3697 tree pz = build_pointer_type
3698 (gfc_get_complex_type (gfc_default_double_kind));
3699
3700 gfor_fndecl_sgemm = gfc_build_library_function_decl
3701 (get_identifier
3702 (flag_underscoring ? "sgemm_" : "sgemm"),
3703 void_type_node, 15, pchar_type_node,
3704 pchar_type_node, pint, pint, pint, ps, ps, pint,
3705 ps, pint, ps, ps, pint, integer_type_node,
3706 integer_type_node);
3707 gfor_fndecl_dgemm = gfc_build_library_function_decl
3708 (get_identifier
3709 (flag_underscoring ? "dgemm_" : "dgemm"),
3710 void_type_node, 15, pchar_type_node,
3711 pchar_type_node, pint, pint, pint, pd, pd, pint,
3712 pd, pint, pd, pd, pint, integer_type_node,
3713 integer_type_node);
3714 gfor_fndecl_cgemm = gfc_build_library_function_decl
3715 (get_identifier
3716 (flag_underscoring ? "cgemm_" : "cgemm"),
3717 void_type_node, 15, pchar_type_node,
3718 pchar_type_node, pint, pint, pint, pc, pc, pint,
3719 pc, pint, pc, pc, pint, integer_type_node,
3720 integer_type_node);
3721 gfor_fndecl_zgemm = gfc_build_library_function_decl
3722 (get_identifier
3723 (flag_underscoring ? "zgemm_" : "zgemm"),
3724 void_type_node, 15, pchar_type_node,
3725 pchar_type_node, pint, pint, pint, pz, pz, pint,
3726 pz, pint, pz, pz, pint, integer_type_node,
3727 integer_type_node);
3728 }
3729
3730 /* Other functions. */
3731 gfor_fndecl_iargc = gfc_build_library_function_decl (
3732 get_identifier (PREFIX ("iargc")), gfc_int4_type_node, 0);
3733 TREE_NOTHROW (gfor_fndecl_iargc) = 1;
3734
3735 gfor_fndecl_kill_sub = gfc_build_library_function_decl (
3736 get_identifier (PREFIX ("kill_sub")), void_type_node,
3737 3, gfc_int4_type_node, gfc_int4_type_node, gfc_pint4_type_node);
3738
3739 gfor_fndecl_kill = gfc_build_library_function_decl (
3740 get_identifier (PREFIX ("kill")), gfc_int4_type_node,
3741 2, gfc_int4_type_node, gfc_int4_type_node);
3742
3743 gfor_fndecl_is_contiguous0 = gfc_build_library_function_decl_with_spec (
3744 get_identifier (PREFIX("is_contiguous0")), ". R ",
3745 gfc_int4_type_node, 1, pvoid_type_node);
3746 DECL_PURE_P (gfor_fndecl_is_contiguous0) = 1;
3747 TREE_NOTHROW (gfor_fndecl_is_contiguous0) = 1;
3748 }
3749
3750
3751 /* Make prototypes for runtime library functions. */
3752
3753 void
3754 gfc_build_builtin_function_decls (void)
3755 {
3756 tree gfc_int8_type_node = gfc_get_int_type (8);
3757
3758 gfor_fndecl_stop_numeric = gfc_build_library_function_decl (
3759 get_identifier (PREFIX("stop_numeric")),
3760 void_type_node, 2, integer_type_node, boolean_type_node);
3761 /* STOP doesn't return. */
3762 TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1;
3763
3764 gfor_fndecl_stop_string = gfc_build_library_function_decl_with_spec (
3765 get_identifier (PREFIX("stop_string")), ". R . . ",
3766 void_type_node, 3, pchar_type_node, size_type_node,
3767 boolean_type_node);
3768 /* STOP doesn't return. */
3769 TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1;
3770
3771 gfor_fndecl_error_stop_numeric = gfc_build_library_function_decl (
3772 get_identifier (PREFIX("error_stop_numeric")),
3773 void_type_node, 2, integer_type_node, boolean_type_node);
3774 /* ERROR STOP doesn't return. */
3775 TREE_THIS_VOLATILE (gfor_fndecl_error_stop_numeric) = 1;
3776
3777 gfor_fndecl_error_stop_string = gfc_build_library_function_decl_with_spec (
3778 get_identifier (PREFIX("error_stop_string")), ". R . . ",
3779 void_type_node, 3, pchar_type_node, size_type_node,
3780 boolean_type_node);
3781 /* ERROR STOP doesn't return. */
3782 TREE_THIS_VOLATILE (gfor_fndecl_error_stop_string) = 1;
3783
3784 gfor_fndecl_pause_numeric = gfc_build_library_function_decl (
3785 get_identifier (PREFIX("pause_numeric")),
3786 void_type_node, 1, gfc_int8_type_node);
3787
3788 gfor_fndecl_pause_string = gfc_build_library_function_decl_with_spec (
3789 get_identifier (PREFIX("pause_string")), ". R . ",
3790 void_type_node, 2, pchar_type_node, size_type_node);
3791
3792 gfor_fndecl_runtime_error = gfc_build_library_function_decl_with_spec (
3793 get_identifier (PREFIX("runtime_error")), ". R ",
3794 void_type_node, -1, pchar_type_node);
3795 /* The runtime_error function does not return. */
3796 TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1;
3797
3798 gfor_fndecl_runtime_error_at = gfc_build_library_function_decl_with_spec (
3799 get_identifier (PREFIX("runtime_error_at")), ". R R ",
3800 void_type_node, -2, pchar_type_node, pchar_type_node);
3801 /* The runtime_error_at function does not return. */
3802 TREE_THIS_VOLATILE (gfor_fndecl_runtime_error_at) = 1;
3803
3804 gfor_fndecl_runtime_warning_at = gfc_build_library_function_decl_with_spec (
3805 get_identifier (PREFIX("runtime_warning_at")), ". R R ",
3806 void_type_node, -2, pchar_type_node, pchar_type_node);
3807
3808 gfor_fndecl_generate_error = gfc_build_library_function_decl_with_spec (
3809 get_identifier (PREFIX("generate_error")), ". R . R ",
3810 void_type_node, 3, pvoid_type_node, integer_type_node,
3811 pchar_type_node);
3812
3813 gfor_fndecl_os_error_at = gfc_build_library_function_decl_with_spec (
3814 get_identifier (PREFIX("os_error_at")), ". R R ",
3815 void_type_node, -2, pchar_type_node, pchar_type_node);
3816 /* The os_error_at function does not return. */
3817 TREE_THIS_VOLATILE (gfor_fndecl_os_error_at) = 1;
3818
3819 gfor_fndecl_set_args = gfc_build_library_function_decl (
3820 get_identifier (PREFIX("set_args")),
3821 void_type_node, 2, integer_type_node,
3822 build_pointer_type (pchar_type_node));
3823
3824 gfor_fndecl_set_fpe = gfc_build_library_function_decl (
3825 get_identifier (PREFIX("set_fpe")),
3826 void_type_node, 1, integer_type_node);
3827
3828 gfor_fndecl_ieee_procedure_entry = gfc_build_library_function_decl (
3829 get_identifier (PREFIX("ieee_procedure_entry")),
3830 void_type_node, 1, pvoid_type_node);
3831
3832 gfor_fndecl_ieee_procedure_exit = gfc_build_library_function_decl (
3833 get_identifier (PREFIX("ieee_procedure_exit")),
3834 void_type_node, 1, pvoid_type_node);
3835
3836 /* Keep the array dimension in sync with the call, later in this file. */
3837 gfor_fndecl_set_options = gfc_build_library_function_decl_with_spec (
3838 get_identifier (PREFIX("set_options")), ". . R ",
3839 void_type_node, 2, integer_type_node,
3840 build_pointer_type (integer_type_node));
3841
3842 gfor_fndecl_set_convert = gfc_build_library_function_decl (
3843 get_identifier (PREFIX("set_convert")),
3844 void_type_node, 1, integer_type_node);
3845
3846 gfor_fndecl_set_record_marker = gfc_build_library_function_decl (
3847 get_identifier (PREFIX("set_record_marker")),
3848 void_type_node, 1, integer_type_node);
3849
3850 gfor_fndecl_set_max_subrecord_length = gfc_build_library_function_decl (
3851 get_identifier (PREFIX("set_max_subrecord_length")),
3852 void_type_node, 1, integer_type_node);
3853
3854 gfor_fndecl_in_pack = gfc_build_library_function_decl_with_spec (
3855 get_identifier (PREFIX("internal_pack")), ". r ",
3856 pvoid_type_node, 1, pvoid_type_node);
3857
3858 gfor_fndecl_in_unpack = gfc_build_library_function_decl_with_spec (
3859 get_identifier (PREFIX("internal_unpack")), ". w R ",
3860 void_type_node, 2, pvoid_type_node, pvoid_type_node);
3861
3862 gfor_fndecl_associated = gfc_build_library_function_decl_with_spec (
3863 get_identifier (PREFIX("associated")), ". R R ",
3864 integer_type_node, 2, ppvoid_type_node, ppvoid_type_node);
3865 DECL_PURE_P (gfor_fndecl_associated) = 1;
3866 TREE_NOTHROW (gfor_fndecl_associated) = 1;
3867
3868 /* Coarray library calls. */
3869 if (flag_coarray == GFC_FCOARRAY_LIB)
3870 {
3871 tree pint_type, pppchar_type;
3872
3873 pint_type = build_pointer_type (integer_type_node);
3874 pppchar_type
3875 = build_pointer_type (build_pointer_type (pchar_type_node));
3876
3877 gfor_fndecl_caf_init = gfc_build_library_function_decl_with_spec (
3878 get_identifier (PREFIX("caf_init")), ". W W ",
3879 void_type_node, 2, pint_type, pppchar_type);
3880
3881 gfor_fndecl_caf_finalize = gfc_build_library_function_decl (
3882 get_identifier (PREFIX("caf_finalize")), void_type_node, 0);
3883
3884 gfor_fndecl_caf_this_image = gfc_build_library_function_decl (
3885 get_identifier (PREFIX("caf_this_image")), integer_type_node,
3886 1, integer_type_node);
3887
3888 gfor_fndecl_caf_num_images = gfc_build_library_function_decl (
3889 get_identifier (PREFIX("caf_num_images")), integer_type_node,
3890 2, integer_type_node, integer_type_node);
3891
3892 gfor_fndecl_caf_register = gfc_build_library_function_decl_with_spec (
3893 get_identifier (PREFIX("caf_register")), ". . . W w w w . ",
3894 void_type_node, 7,
3895 size_type_node, integer_type_node, ppvoid_type_node, pvoid_type_node,
3896 pint_type, pchar_type_node, size_type_node);
3897
3898 gfor_fndecl_caf_deregister = gfc_build_library_function_decl_with_spec (
3899 get_identifier (PREFIX("caf_deregister")), ". W . w w . ",
3900 void_type_node, 5,
3901 ppvoid_type_node, integer_type_node, pint_type, pchar_type_node,
3902 size_type_node);
3903
3904 gfor_fndecl_caf_get = gfc_build_library_function_decl_with_spec (
3905 get_identifier (PREFIX("caf_get")), ". r . . r r w . . . w ",
3906 void_type_node, 10,
3907 pvoid_type_node, size_type_node, integer_type_node, pvoid_type_node,
3908 pvoid_type_node, pvoid_type_node, integer_type_node, integer_type_node,
3909 boolean_type_node, pint_type);
3910
3911 gfor_fndecl_caf_send = gfc_build_library_function_decl_with_spec (
3912 get_identifier (PREFIX("caf_send")), ". r . . w r r . . . w ",
3913 void_type_node, 11,
3914 pvoid_type_node, size_type_node, integer_type_node, pvoid_type_node,
3915 pvoid_type_node, pvoid_type_node, integer_type_node, integer_type_node,
3916 boolean_type_node, pint_type, pvoid_type_node);
3917
3918 gfor_fndecl_caf_sendget = gfc_build_library_function_decl_with_spec (
3919 get_identifier (PREFIX("caf_sendget")), ". r . . w r r . . r r . . . w ",
3920 void_type_node, 14, pvoid_type_node, size_type_node, integer_type_node,
3921 pvoid_type_node, pvoid_type_node, pvoid_type_node, size_type_node,
3922 integer_type_node, pvoid_type_node, pvoid_type_node, integer_type_node,
3923 integer_type_node, boolean_type_node, integer_type_node);
3924
3925 gfor_fndecl_caf_get_by_ref = gfc_build_library_function_decl_with_spec (
3926 get_identifier (PREFIX("caf_get_by_ref")), ". r . w r . . . . w . ",
3927 void_type_node,
3928 10, pvoid_type_node, integer_type_node, pvoid_type_node,
3929 pvoid_type_node, integer_type_node, integer_type_node,
3930 boolean_type_node, boolean_type_node, pint_type, integer_type_node);
3931
3932 gfor_fndecl_caf_send_by_ref = gfc_build_library_function_decl_with_spec (
3933 get_identifier (PREFIX("caf_send_by_ref")), ". r . r r . . . . w . ",
3934 void_type_node, 10, pvoid_type_node, integer_type_node, pvoid_type_node,
3935 pvoid_type_node, integer_type_node, integer_type_node,
3936 boolean_type_node, boolean_type_node, pint_type, integer_type_node);
3937
3938 gfor_fndecl_caf_sendget_by_ref
3939 = gfc_build_library_function_decl_with_spec (
3940 get_identifier (PREFIX("caf_sendget_by_ref")),
3941 ". r . r r . r . . . w w . . ",
3942 void_type_node, 13, pvoid_type_node, integer_type_node,
3943 pvoid_type_node, pvoid_type_node, integer_type_node,
3944 pvoid_type_node, integer_type_node, integer_type_node,
3945 boolean_type_node, pint_type, pint_type, integer_type_node,
3946 integer_type_node);
3947
3948 gfor_fndecl_caf_sync_all = gfc_build_library_function_decl_with_spec (
3949 get_identifier (PREFIX("caf_sync_all")), ". w w . ", void_type_node,
3950 3, pint_type, pchar_type_node, size_type_node);
3951
3952 gfor_fndecl_caf_sync_memory = gfc_build_library_function_decl_with_spec (
3953 get_identifier (PREFIX("caf_sync_memory")), ". w w . ", void_type_node,
3954 3, pint_type, pchar_type_node, size_type_node);
3955
3956 gfor_fndecl_caf_sync_images = gfc_build_library_function_decl_with_spec (
3957 get_identifier (PREFIX("caf_sync_images")), ". . r w w . ", void_type_node,
3958 5, integer_type_node, pint_type, pint_type,
3959 pchar_type_node, size_type_node);
3960
3961 gfor_fndecl_caf_error_stop = gfc_build_library_function_decl (
3962 get_identifier (PREFIX("caf_error_stop")),
3963 void_type_node, 1, integer_type_node);
3964 /* CAF's ERROR STOP doesn't return. */
3965 TREE_THIS_VOLATILE (gfor_fndecl_caf_error_stop) = 1;
3966
3967 gfor_fndecl_caf_error_stop_str = gfc_build_library_function_decl_with_spec (
3968 get_identifier (PREFIX("caf_error_stop_str")), ". r . ",
3969 void_type_node, 2, pchar_type_node, size_type_node);
3970 /* CAF's ERROR STOP doesn't return. */
3971 TREE_THIS_VOLATILE (gfor_fndecl_caf_error_stop_str) = 1;
3972
3973 gfor_fndecl_caf_stop_numeric = gfc_build_library_function_decl (
3974 get_identifier (PREFIX("caf_stop_numeric")),
3975 void_type_node, 1, integer_type_node);
3976 /* CAF's STOP doesn't return. */
3977 TREE_THIS_VOLATILE (gfor_fndecl_caf_stop_numeric) = 1;
3978
3979 gfor_fndecl_caf_stop_str = gfc_build_library_function_decl_with_spec (
3980 get_identifier (PREFIX("caf_stop_str")), ". r . ",
3981 void_type_node, 2, pchar_type_node, size_type_node);
3982 /* CAF's STOP doesn't return. */
3983 TREE_THIS_VOLATILE (gfor_fndecl_caf_stop_str) = 1;
3984
3985 gfor_fndecl_caf_atomic_def = gfc_build_library_function_decl_with_spec (
3986 get_identifier (PREFIX("caf_atomic_define")), ". r . . w w . . ",
3987 void_type_node, 7, pvoid_type_node, size_type_node, integer_type_node,
3988 pvoid_type_node, pint_type, integer_type_node, integer_type_node);
3989
3990 gfor_fndecl_caf_atomic_ref = gfc_build_library_function_decl_with_spec (
3991 get_identifier (PREFIX("caf_atomic_ref")), ". r . . w w . . ",
3992 void_type_node, 7, pvoid_type_node, size_type_node, integer_type_node,
3993 pvoid_type_node, pint_type, integer_type_node, integer_type_node);
3994
3995 gfor_fndecl_caf_atomic_cas = gfc_build_library_function_decl_with_spec (
3996 get_identifier (PREFIX("caf_atomic_cas")), ". r . . w r r w . . ",
3997 void_type_node, 9, pvoid_type_node, size_type_node, integer_type_node,
3998 pvoid_type_node, pvoid_type_node, pvoid_type_node, pint_type,
3999 integer_type_node, integer_type_node);
4000
4001 gfor_fndecl_caf_atomic_op = gfc_build_library_function_decl_with_spec (
4002 get_identifier (PREFIX("caf_atomic_op")), ". . r . . r w w . . ",
4003 void_type_node, 9, integer_type_node, pvoid_type_node, size_type_node,
4004 integer_type_node, pvoid_type_node, pvoid_type_node, pint_type,
4005 integer_type_node, integer_type_node);
4006
4007 gfor_fndecl_caf_lock = gfc_build_library_function_decl_with_spec (
4008 get_identifier (PREFIX("caf_lock")), ". r . . w w w . ",
4009 void_type_node, 7, pvoid_type_node, size_type_node, integer_type_node,
4010 pint_type, pint_type, pchar_type_node, size_type_node);
4011
4012 gfor_fndecl_caf_unlock = gfc_build_library_function_decl_with_spec (
4013 get_identifier (PREFIX("caf_unlock")), ". r . . w w . ",
4014 void_type_node, 6, pvoid_type_node, size_type_node, integer_type_node,
4015 pint_type, pchar_type_node, size_type_node);
4016
4017 gfor_fndecl_caf_event_post = gfc_build_library_function_decl_with_spec (
4018 get_identifier (PREFIX("caf_event_post")), ". r . . w w . ",
4019 void_type_node, 6, pvoid_type_node, size_type_node, integer_type_node,
4020 pint_type, pchar_type_node, size_type_node);
4021
4022 gfor_fndecl_caf_event_wait = gfc_build_library_function_decl_with_spec (
4023 get_identifier (PREFIX("caf_event_wait")), ". r . . w w . ",
4024 void_type_node, 6, pvoid_type_node, size_type_node, integer_type_node,
4025 pint_type, pchar_type_node, size_type_node);
4026
4027 gfor_fndecl_caf_event_query = gfc_build_library_function_decl_with_spec (
4028 get_identifier (PREFIX("caf_event_query")), ". r . . w w ",
4029 void_type_node, 5, pvoid_type_node, size_type_node, integer_type_node,
4030 pint_type, pint_type);
4031
4032 gfor_fndecl_caf_fail_image = gfc_build_library_function_decl (
4033 get_identifier (PREFIX("caf_fail_image")), void_type_node, 0);
4034 /* CAF's FAIL doesn't return. */
4035 TREE_THIS_VOLATILE (gfor_fndecl_caf_fail_image) = 1;
4036
4037 gfor_fndecl_caf_failed_images
4038 = gfc_build_library_function_decl_with_spec (
4039 get_identifier (PREFIX("caf_failed_images")), ". w . r ",
4040 void_type_node, 3, pvoid_type_node, ppvoid_type_node,
4041 integer_type_node);
4042
4043 gfor_fndecl_caf_form_team
4044 = gfc_build_library_function_decl_with_spec (
4045 get_identifier (PREFIX("caf_form_team")), ". . W . ",
4046 void_type_node, 3, integer_type_node, ppvoid_type_node,
4047 integer_type_node);
4048
4049 gfor_fndecl_caf_change_team
4050 = gfc_build_library_function_decl_with_spec (
4051 get_identifier (PREFIX("caf_change_team")), ". w . ",
4052 void_type_node, 2, ppvoid_type_node,
4053 integer_type_node);
4054
4055 gfor_fndecl_caf_end_team
4056 = gfc_build_library_function_decl (
4057 get_identifier (PREFIX("caf_end_team")), void_type_node, 0);
4058
4059 gfor_fndecl_caf_get_team
4060 = gfc_build_library_function_decl (
4061 get_identifier (PREFIX("caf_get_team")),
4062 void_type_node, 1, integer_type_node);
4063
4064 gfor_fndecl_caf_sync_team
4065 = gfc_build_library_function_decl_with_spec (
4066 get_identifier (PREFIX("caf_sync_team")), ". r . ",
4067 void_type_node, 2, ppvoid_type_node,
4068 integer_type_node);
4069
4070 gfor_fndecl_caf_team_number
4071 = gfc_build_library_function_decl_with_spec (
4072 get_identifier (PREFIX("caf_team_number")), ". r ",
4073 integer_type_node, 1, integer_type_node);
4074
4075 gfor_fndecl_caf_image_status
4076 = gfc_build_library_function_decl_with_spec (
4077 get_identifier (PREFIX("caf_image_status")), ". . r ",
4078 integer_type_node, 2, integer_type_node, ppvoid_type_node);
4079
4080 gfor_fndecl_caf_stopped_images
4081 = gfc_build_library_function_decl_with_spec (
4082 get_identifier (PREFIX("caf_stopped_images")), ". w r r ",
4083 void_type_node, 3, pvoid_type_node, ppvoid_type_node,
4084 integer_type_node);
4085
4086 gfor_fndecl_co_broadcast = gfc_build_library_function_decl_with_spec (
4087 get_identifier (PREFIX("caf_co_broadcast")), ". w . w w . ",
4088 void_type_node, 5, pvoid_type_node, integer_type_node,
4089 pint_type, pchar_type_node, size_type_node);
4090
4091 gfor_fndecl_co_max = gfc_build_library_function_decl_with_spec (
4092 get_identifier (PREFIX("caf_co_max")), ". w . w w . . ",
4093 void_type_node, 6, pvoid_type_node, integer_type_node,
4094 pint_type, pchar_type_node, integer_type_node, size_type_node);
4095
4096 gfor_fndecl_co_min = gfc_build_library_function_decl_with_spec (
4097 get_identifier (PREFIX("caf_co_min")), ". w . w w . . ",
4098 void_type_node, 6, pvoid_type_node, integer_type_node,
4099 pint_type, pchar_type_node, integer_type_node, size_type_node);
4100
4101 gfor_fndecl_co_reduce = gfc_build_library_function_decl_with_spec (
4102 get_identifier (PREFIX("caf_co_reduce")), ". w r . . w w . . ",
4103 void_type_node, 8, pvoid_type_node,
4104 build_pointer_type (build_varargs_function_type_list (void_type_node,
4105 NULL_TREE)),
4106 integer_type_node, integer_type_node, pint_type, pchar_type_node,
4107 integer_type_node, size_type_node);
4108
4109 gfor_fndecl_co_sum = gfc_build_library_function_decl_with_spec (
4110 get_identifier (PREFIX("caf_co_sum")), ". w . w w . ",
4111 void_type_node, 5, pvoid_type_node, integer_type_node,
4112 pint_type, pchar_type_node, size_type_node);
4113
4114 gfor_fndecl_caf_is_present = gfc_build_library_function_decl_with_spec (
4115 get_identifier (PREFIX("caf_is_present")), ". r . r ",
4116 integer_type_node, 3, pvoid_type_node, integer_type_node,
4117 pvoid_type_node);
4118
4119 gfor_fndecl_caf_random_init = gfc_build_library_function_decl (
4120 get_identifier (PREFIX("caf_random_init")),
4121 void_type_node, 2, logical_type_node, logical_type_node);
4122 }
4123
4124 gfc_build_intrinsic_function_decls ();
4125 gfc_build_intrinsic_lib_fndecls ();
4126 gfc_build_io_library_fndecls ();
4127 }
4128
4129
4130 /* Evaluate the length of dummy character variables. */
4131
4132 static void
4133 gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl,
4134 gfc_wrapped_block *block)
4135 {
4136 stmtblock_t init;
4137
4138 gfc_finish_decl (cl->backend_decl);
4139
4140 gfc_start_block (&init);
4141
4142 /* Evaluate the string length expression. */
4143 gfc_conv_string_length (cl, NULL, &init);
4144
4145 gfc_trans_vla_type_sizes (sym, &init);
4146
4147 gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
4148 }
4149
4150
4151 /* Allocate and cleanup an automatic character variable. */
4152
4153 static void
4154 gfc_trans_auto_character_variable (gfc_symbol * sym, gfc_wrapped_block * block)
4155 {
4156 stmtblock_t init;
4157 tree decl;
4158 tree tmp;
4159
4160 gcc_assert (sym->backend_decl);
4161 gcc_assert (sym->ts.u.cl && sym->ts.u.cl->length);
4162
4163 gfc_init_block (&init);
4164
4165 /* Evaluate the string length expression. */
4166 gfc_conv_string_length (sym->ts.u.cl, NULL, &init);
4167
4168 gfc_trans_vla_type_sizes (sym, &init);
4169
4170 decl = sym->backend_decl;
4171
4172 /* Emit a DECL_EXPR for this variable, which will cause the
4173 gimplifier to allocate storage, and all that good stuff. */
4174 tmp = fold_build1_loc (input_location, DECL_EXPR, TREE_TYPE (decl), decl);
4175 gfc_add_expr_to_block (&init, tmp);
4176
4177 gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
4178 }
4179
4180 /* Set the initial value of ASSIGN statement auxiliary variable explicitly. */
4181
4182 static void
4183 gfc_trans_assign_aux_var (gfc_symbol * sym, gfc_wrapped_block * block)
4184 {
4185 stmtblock_t init;
4186
4187 gcc_assert (sym->backend_decl);
4188 gfc_start_block (&init);
4189
4190 /* Set the initial value to length. See the comments in
4191 function gfc_add_assign_aux_vars in this file. */
4192 gfc_add_modify (&init, GFC_DECL_STRING_LEN (sym->backend_decl),
4193 build_int_cst (gfc_charlen_type_node, -2));
4194
4195 gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
4196 }
4197
4198 static void
4199 gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body)
4200 {
4201 tree t = *tp, var, val;
4202
4203 if (t == NULL || t == error_mark_node)
4204 return;
4205 if (TREE_CONSTANT (t) || DECL_P (t))
4206 return;
4207
4208 if (TREE_CODE (t) == SAVE_EXPR)
4209 {
4210 if (SAVE_EXPR_RESOLVED_P (t))
4211 {
4212 *tp = TREE_OPERAND (t, 0);
4213 return;
4214 }
4215 val = TREE_OPERAND (t, 0);
4216 }
4217 else
4218 val = t;
4219
4220 var = gfc_create_var_np (TREE_TYPE (t), NULL);
4221 gfc_add_decl_to_function (var);
4222 gfc_add_modify (body, var, unshare_expr (val));
4223 if (TREE_CODE (t) == SAVE_EXPR)
4224 TREE_OPERAND (t, 0) = var;
4225 *tp = var;
4226 }
4227
4228 static void
4229 gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body)
4230 {
4231 tree t;
4232
4233 if (type == NULL || type == error_mark_node)
4234 return;
4235
4236 type = TYPE_MAIN_VARIANT (type);
4237
4238 if (TREE_CODE (type) == INTEGER_TYPE)
4239 {
4240 gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body);
4241 gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body);
4242
4243 for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
4244 {
4245 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type);
4246 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type);
4247 }
4248 }
4249 else if (TREE_CODE (type) == ARRAY_TYPE)
4250 {
4251 gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body);
4252 gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body);
4253 gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body);
4254 gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body);
4255
4256 for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
4257 {
4258 TYPE_SIZE (t) = TYPE_SIZE (type);
4259 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type);
4260 }
4261 }
4262 }
4263
4264 /* Make sure all type sizes and array domains are either constant,
4265 or variable or parameter decls. This is a simplified variant
4266 of gimplify_type_sizes, but we can't use it here, as none of the
4267 variables in the expressions have been gimplified yet.
4268 As type sizes and domains for various variable length arrays
4269 contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars
4270 time, without this routine gimplify_type_sizes in the middle-end
4271 could result in the type sizes being gimplified earlier than where
4272 those variables are initialized. */
4273
4274 void
4275 gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body)
4276 {
4277 tree type = TREE_TYPE (sym->backend_decl);
4278
4279 if (TREE_CODE (type) == FUNCTION_TYPE
4280 && (sym->attr.function || sym->attr.result || sym->attr.entry))
4281 {
4282 if (! current_fake_result_decl)
4283 return;
4284
4285 type = TREE_TYPE (TREE_VALUE (current_fake_result_decl));
4286 }
4287
4288 while (POINTER_TYPE_P (type))
4289 type = TREE_TYPE (type);
4290
4291 if (GFC_DESCRIPTOR_TYPE_P (type))
4292 {
4293 tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
4294
4295 while (POINTER_TYPE_P (etype))
4296 etype = TREE_TYPE (etype);
4297
4298 gfc_trans_vla_type_sizes_1 (etype, body);
4299 }
4300
4301 gfc_trans_vla_type_sizes_1 (type, body);
4302 }
4303
4304
4305 /* Initialize a derived type by building an lvalue from the symbol
4306 and using trans_assignment to do the work. Set dealloc to false
4307 if no deallocation prior the assignment is needed. */
4308 void
4309 gfc_init_default_dt (gfc_symbol * sym, stmtblock_t * block, bool dealloc)
4310 {
4311 gfc_expr *e;
4312 tree tmp;
4313 tree present;
4314
4315 gcc_assert (block);
4316
4317 /* Initialization of PDTs is done elsewhere. */
4318 if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.pdt_type)
4319 return;
4320
4321 gcc_assert (!sym->attr.allocatable);
4322 gfc_set_sym_referenced (sym);
4323 e = gfc_lval_expr_from_sym (sym);
4324 tmp = gfc_trans_assignment (e, sym->value, false, dealloc);
4325 if (sym->attr.dummy && (sym->attr.optional
4326 || sym->ns->proc_name->attr.entry_master))
4327 {
4328 present = gfc_conv_expr_present (sym);
4329 tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp), present,
4330 tmp, build_empty_stmt (input_location));
4331 }
4332 gfc_add_expr_to_block (block, tmp);
4333 gfc_free_expr (e);
4334 }
4335
4336
4337 /* Initialize INTENT(OUT) derived type dummies. As well as giving
4338 them their default initializer, if they do not have allocatable
4339 components, they have their allocatable components deallocated. */
4340
4341 static void
4342 init_intent_out_dt (gfc_symbol * proc_sym, gfc_wrapped_block * block)
4343 {
4344 stmtblock_t init;
4345 gfc_formal_arglist *f;
4346 tree tmp;
4347 tree present;
4348 gfc_symbol *s;
4349 bool dealloc_with_value = false;
4350
4351 gfc_init_block (&init);
4352 for (f = gfc_sym_get_dummy_args (proc_sym); f; f = f->next)
4353 if (f->sym && f->sym->attr.intent == INTENT_OUT
4354 && !f->sym->attr.pointer
4355 && f->sym->ts.type == BT_DERIVED)
4356 {
4357 s = f->sym;
4358 tmp = NULL_TREE;
4359
4360 /* Note: Allocatables are excluded as they are already handled
4361 by the caller. */
4362 if (!f->sym->attr.allocatable
4363 && gfc_is_finalizable (s->ts.u.derived, NULL))
4364 {
4365 stmtblock_t block;
4366 gfc_expr *e;
4367
4368 gfc_init_block (&block);
4369 s->attr.referenced = 1;
4370 e = gfc_lval_expr_from_sym (s);
4371 gfc_add_finalizer_call (&block, e);
4372 gfc_free_expr (e);
4373 tmp = gfc_finish_block (&block);
4374 }
4375
4376 /* Note: Allocatables are excluded as they are already handled
4377 by the caller. */
4378 if (tmp == NULL_TREE && !s->attr.allocatable
4379 && s->ts.u.derived->attr.alloc_comp)
4380 {
4381 tmp = gfc_deallocate_alloc_comp (s->ts.u.derived,
4382 s->backend_decl,
4383 s->as ? s->as->rank : 0);
4384 dealloc_with_value = s->value;
4385 }
4386
4387 if (tmp != NULL_TREE && (s->attr.optional
4388 || s->ns->proc_name->attr.entry_master))
4389 {
4390 present = gfc_conv_expr_present (s);
4391 tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp),
4392 present, tmp, build_empty_stmt (input_location));
4393 }
4394
4395 if (tmp != NULL_TREE && !dealloc_with_value)
4396 gfc_add_expr_to_block (&init, tmp);
4397 else if (s->value && !s->attr.allocatable)
4398 {
4399 gfc_add_expr_to_block (&init, tmp);
4400 gfc_init_default_dt (s, &init, false);
4401 dealloc_with_value = false;
4402 }
4403 }
4404 else if (f->sym && f->sym->attr.intent == INTENT_OUT
4405 && f->sym->ts.type == BT_CLASS
4406 && !CLASS_DATA (f->sym)->attr.class_pointer
4407 && !CLASS_DATA (f->sym)->attr.allocatable)
4408 {
4409 stmtblock_t block;
4410 gfc_expr *e;
4411
4412 gfc_init_block (&block);
4413 f->sym->attr.referenced = 1;
4414 e = gfc_lval_expr_from_sym (f->sym);
4415 gfc_add_finalizer_call (&block, e);
4416 gfc_free_expr (e);
4417 tmp = gfc_finish_block (&block);
4418
4419 if (f->sym->attr.optional || f->sym->ns->proc_name->attr.entry_master)
4420 {
4421 present = gfc_conv_expr_present (f->sym);
4422 tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp),
4423 present, tmp,
4424 build_empty_stmt (input_location));
4425 }
4426 gfc_add_expr_to_block (&init, tmp);
4427 }
4428 gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
4429 }
4430
4431
4432 /* Helper function to manage deferred string lengths. */
4433
4434 static tree
4435 gfc_null_and_pass_deferred_len (gfc_symbol *sym, stmtblock_t *init,
4436 locus *loc)
4437 {
4438 tree tmp;
4439
4440 /* Character length passed by reference. */
4441 tmp = sym->ts.u.cl->passed_length;
4442 tmp = build_fold_indirect_ref_loc (input_location, tmp);
4443 tmp = fold_convert (gfc_charlen_type_node, tmp);
4444
4445 if (!sym->attr.dummy || sym->attr.intent == INTENT_OUT)
4446 /* Zero the string length when entering the scope. */
4447 gfc_add_modify (init, sym->ts.u.cl->backend_decl,
4448 build_int_cst (gfc_charlen_type_node, 0));
4449 else
4450 {
4451 tree tmp2;
4452
4453 tmp2 = fold_build2_loc (input_location, MODIFY_EXPR,
4454 gfc_charlen_type_node,
4455 sym->ts.u.cl->backend_decl, tmp);
4456 if (sym->attr.optional)
4457 {
4458 tree present = gfc_conv_expr_present (sym);
4459 tmp2 = build3_loc (input_location, COND_EXPR,
4460 void_type_node, present, tmp2,
4461 build_empty_stmt (input_location));
4462 }
4463 gfc_add_expr_to_block (init, tmp2);
4464 }
4465
4466 gfc_restore_backend_locus (loc);
4467
4468 /* Pass the final character length back. */
4469 if (sym->attr.intent != INTENT_IN)
4470 {
4471 tmp = fold_build2_loc (input_location, MODIFY_EXPR,
4472 gfc_charlen_type_node, tmp,
4473 sym->ts.u.cl->backend_decl);
4474 if (sym->attr.optional)
4475 {
4476 tree present = gfc_conv_expr_present (sym);
4477 tmp = build3_loc (input_location, COND_EXPR,
4478 void_type_node, present, tmp,
4479 build_empty_stmt (input_location));
4480 }
4481 }
4482 else
4483 tmp = NULL_TREE;
4484
4485 return tmp;
4486 }
4487
4488
4489 /* Get the result expression for a procedure. */
4490
4491 static tree
4492 get_proc_result (gfc_symbol* sym)
4493 {
4494 if (sym->attr.subroutine || sym == sym->result)
4495 {
4496 if (current_fake_result_decl != NULL)
4497 return TREE_VALUE (current_fake_result_decl);
4498
4499 return NULL_TREE;
4500 }
4501
4502 return sym->result->backend_decl;
4503 }
4504
4505
4506 /* Generate function entry and exit code, and add it to the function body.
4507 This includes:
4508 Allocation and initialization of array variables.
4509 Allocation of character string variables.
4510 Initialization and possibly repacking of dummy arrays.
4511 Initialization of ASSIGN statement auxiliary variable.
4512 Initialization of ASSOCIATE names.
4513 Automatic deallocation. */
4514
4515 void
4516 gfc_trans_deferred_vars (gfc_symbol * proc_sym, gfc_wrapped_block * block)
4517 {
4518 locus loc;
4519 gfc_symbol *sym;
4520 gfc_formal_arglist *f;
4521 stmtblock_t tmpblock;
4522 bool seen_trans_deferred_array = false;
4523 bool is_pdt_type = false;
4524 tree tmp = NULL;
4525 gfc_expr *e;
4526 gfc_se se;
4527 stmtblock_t init;
4528
4529 /* Deal with implicit return variables. Explicit return variables will
4530 already have been added. */
4531 if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym)
4532 {
4533 if (!current_fake_result_decl)
4534 {
4535 gfc_entry_list *el = NULL;
4536 if (proc_sym->attr.entry_master)
4537 {
4538 for (el = proc_sym->ns->entries; el; el = el->next)
4539 if (el->sym != el->sym->result)
4540 break;
4541 }
4542 /* TODO: move to the appropriate place in resolve.cc. */
4543 if (warn_return_type > 0 && el == NULL)
4544 gfc_warning (OPT_Wreturn_type,
4545 "Return value of function %qs at %L not set",
4546 proc_sym->name, &proc_sym->declared_at);
4547 }
4548 else if (proc_sym->as)
4549 {
4550 tree result = TREE_VALUE (current_fake_result_decl);
4551 gfc_save_backend_locus (&loc);
4552 gfc_set_backend_locus (&proc_sym->declared_at);
4553 gfc_trans_dummy_array_bias (proc_sym, result, block);
4554
4555 /* An automatic character length, pointer array result. */
4556 if (proc_sym->ts.type == BT_CHARACTER
4557 && VAR_P (proc_sym->ts.u.cl->backend_decl))
4558 {
4559 tmp = NULL;
4560 if (proc_sym->ts.deferred)
4561 {
4562 gfc_start_block (&init);
4563 tmp = gfc_null_and_pass_deferred_len (proc_sym, &init, &loc);
4564 gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
4565 }
4566 else
4567 gfc_trans_dummy_character (proc_sym, proc_sym->ts.u.cl, block);
4568 }
4569 }
4570 else if (proc_sym->ts.type == BT_CHARACTER)
4571 {
4572 if (proc_sym->ts.deferred)
4573 {
4574 tmp = NULL;
4575 gfc_save_backend_locus (&loc);
4576 gfc_set_backend_locus (&proc_sym->declared_at);
4577 gfc_start_block (&init);
4578 /* Zero the string length on entry. */
4579 gfc_add_modify (&init, proc_sym->ts.u.cl->backend_decl,
4580 build_int_cst (gfc_charlen_type_node, 0));
4581 /* Null the pointer. */
4582 e = gfc_lval_expr_from_sym (proc_sym);
4583 gfc_init_se (&se, NULL);
4584 se.want_pointer = 1;
4585 gfc_conv_expr (&se, e);
4586 gfc_free_expr (e);
4587 tmp = se.expr;
4588 gfc_add_modify (&init, tmp,
4589 fold_convert (TREE_TYPE (se.expr),
4590 null_pointer_node));
4591 gfc_restore_backend_locus (&loc);
4592
4593 /* Pass back the string length on exit. */
4594 tmp = proc_sym->ts.u.cl->backend_decl;
4595 if (TREE_CODE (tmp) != INDIRECT_REF
4596 && proc_sym->ts.u.cl->passed_length)
4597 {
4598 tmp = proc_sym->ts.u.cl->passed_length;
4599 tmp = build_fold_indirect_ref_loc (input_location, tmp);
4600 tmp = fold_build2_loc (input_location, MODIFY_EXPR,
4601 TREE_TYPE (tmp), tmp,
4602 fold_convert
4603 (TREE_TYPE (tmp),
4604 proc_sym->ts.u.cl->backend_decl));
4605 }
4606 else
4607 tmp = NULL_TREE;
4608
4609 gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
4610 }
4611 else if (VAR_P (proc_sym->ts.u.cl->backend_decl))
4612 gfc_trans_dummy_character (proc_sym, proc_sym->ts.u.cl, block);
4613 }
4614 else
4615 gcc_assert (flag_f2c && proc_sym->ts.type == BT_COMPLEX);
4616 }
4617 else if (proc_sym == proc_sym->result && IS_CLASS_ARRAY (proc_sym))
4618 {
4619 /* Nullify explicit return class arrays on entry. */
4620 tree type;
4621 tmp = get_proc_result (proc_sym);
4622 if (tmp && GFC_CLASS_TYPE_P (TREE_TYPE (tmp)))
4623 {
4624 gfc_start_block (&init);
4625 tmp = gfc_class_data_get (tmp);
4626 type = TREE_TYPE (gfc_conv_descriptor_data_get (tmp));
4627 gfc_conv_descriptor_data_set (&init, tmp, build_int_cst (type, 0));
4628 gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE);
4629 }
4630 }
4631
4632
4633 /* Initialize the INTENT(OUT) derived type dummy arguments. This
4634 should be done here so that the offsets and lbounds of arrays
4635 are available. */
4636 gfc_save_backend_locus (&loc);
4637 gfc_set_backend_locus (&proc_sym->declared_at);
4638 init_intent_out_dt (proc_sym, block);
4639 gfc_restore_backend_locus (&loc);
4640
4641 for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink)
4642 {
4643 bool alloc_comp_or_fini = (sym->ts.type == BT_DERIVED)
4644 && (sym->ts.u.derived->attr.alloc_comp
4645 || gfc_is_finalizable (sym->ts.u.derived,
4646 NULL));
4647 if (sym->assoc)
4648 continue;
4649
4650 if (sym->ts.type == BT_DERIVED
4651 && sym->ts.u.derived
4652 && sym->ts.u.derived->attr.pdt_type)
4653 {
4654 is_pdt_type = true;
4655 gfc_init_block (&tmpblock);
4656 if (!(sym->attr.dummy
4657 || sym->attr.pointer
4658 || sym->attr.allocatable))
4659 {
4660 tmp = gfc_allocate_pdt_comp (sym->ts.u.derived,
4661 sym->backend_decl,
4662 sym->as ? sym->as->rank : 0,
4663 sym->param_list);
4664 gfc_add_expr_to_block (&tmpblock, tmp);
4665 if (!sym->attr.result)
4666 tmp = gfc_deallocate_pdt_comp (sym->ts.u.derived,
4667 sym->backend_decl,
4668 sym->as ? sym->as->rank : 0);
4669 else
4670 tmp = NULL_TREE;
4671 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), tmp);
4672 }
4673 else if (sym->attr.dummy)
4674 {
4675 tmp = gfc_check_pdt_dummy (sym->ts.u.derived,
4676 sym->backend_decl,
4677 sym->as ? sym->as->rank : 0,
4678 sym->param_list);
4679 gfc_add_expr_to_block (&tmpblock, tmp);
4680 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL);
4681 }
4682 }
4683 else if (sym->ts.type == BT_CLASS
4684 && CLASS_DATA (sym)->ts.u.derived
4685 && CLASS_DATA (sym)->ts.u.derived->attr.pdt_type)
4686 {
4687 gfc_component *data = CLASS_DATA (sym);
4688 is_pdt_type = true;
4689 gfc_init_block (&tmpblock);
4690 if (!(sym->attr.dummy
4691 || CLASS_DATA (sym)->attr.pointer
4692 || CLASS_DATA (sym)->attr.allocatable))
4693 {
4694 tmp = gfc_class_data_get (sym->backend_decl);
4695 tmp = gfc_allocate_pdt_comp (data->ts.u.derived, tmp,
4696 data->as ? data->as->rank : 0,
4697 sym->param_list);
4698 gfc_add_expr_to_block (&tmpblock, tmp);
4699 tmp = gfc_class_data_get (sym->backend_decl);
4700 if (!sym->attr.result)
4701 tmp = gfc_deallocate_pdt_comp (data->ts.u.derived, tmp,
4702 data->as ? data->as->rank : 0);
4703 else
4704 tmp = NULL_TREE;
4705 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), tmp);
4706 }
4707 else if (sym->attr.dummy)
4708 {
4709 tmp = gfc_class_data_get (sym->backend_decl);
4710 tmp = gfc_check_pdt_dummy (data->ts.u.derived, tmp,
4711 data->as ? data->as->rank : 0,
4712 sym->param_list);
4713 gfc_add_expr_to_block (&tmpblock, tmp);
4714 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL);
4715 }
4716 }
4717
4718 if (sym->attr.pointer && sym->attr.dimension
4719 && sym->attr.save == SAVE_NONE
4720 && !sym->attr.use_assoc
4721 && !sym->attr.host_assoc
4722 && !sym->attr.dummy
4723 && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (sym->backend_decl)))
4724 {
4725 gfc_init_block (&tmpblock);
4726 gfc_conv_descriptor_span_set (&tmpblock, sym->backend_decl,
4727 build_int_cst (gfc_array_index_type, 0));
4728 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock),
4729 NULL_TREE);
4730 }
4731
4732 if (sym->ts.type == BT_CLASS
4733 && (sym->attr.save || flag_max_stack_var_size == 0)
4734 && CLASS_DATA (sym)->attr.allocatable)
4735 {
4736 tree vptr;
4737
4738 if (UNLIMITED_POLY (sym))
4739 vptr = null_pointer_node;
4740 else
4741 {
4742 gfc_symbol *vsym;
4743 vsym = gfc_find_derived_vtab (sym->ts.u.derived);
4744 vptr = gfc_get_symbol_decl (vsym);
4745 vptr = gfc_build_addr_expr (NULL, vptr);
4746 }
4747
4748 if (CLASS_DATA (sym)->attr.dimension
4749 || (CLASS_DATA (sym)->attr.codimension
4750 && flag_coarray != GFC_FCOARRAY_LIB))
4751 {
4752 tmp = gfc_class_data_get (sym->backend_decl);
4753 tmp = gfc_build_null_descriptor (TREE_TYPE (tmp));
4754 }
4755 else
4756 tmp = null_pointer_node;
4757
4758 DECL_INITIAL (sym->backend_decl)
4759 = gfc_class_set_static_fields (sym->backend_decl, vptr, tmp);
4760 TREE_CONSTANT (DECL_INITIAL (sym->backend_decl)) = 1;
4761 }
4762 else if ((sym->attr.dimension || sym->attr.codimension
4763 || (IS_CLASS_ARRAY (sym) && !CLASS_DATA (sym)->attr.allocatable)))
4764 {
4765 bool is_classarray = IS_CLASS_ARRAY (sym);
4766 symbol_attribute *array_attr;
4767 gfc_array_spec *as;
4768 array_type type_of_array;
4769
4770 array_attr = is_classarray ? &CLASS_DATA (sym)->attr : &sym->attr;
4771 as = is_classarray ? CLASS_DATA (sym)->as : sym->as;
4772 /* Assumed-size Cray pointees need to be treated as AS_EXPLICIT. */
4773 type_of_array = as->type;
4774 if (type_of_array == AS_ASSUMED_SIZE && as->cp_was_assumed)
4775 type_of_array = AS_EXPLICIT;
4776 switch (type_of_array)
4777 {
4778 case AS_EXPLICIT:
4779 if (sym->attr.dummy || sym->attr.result)
4780 gfc_trans_dummy_array_bias (sym, sym->backend_decl, block);
4781 /* Allocatable and pointer arrays need to processed
4782 explicitly. */
4783 else if ((sym->ts.type != BT_CLASS && sym->attr.pointer)
4784 || (sym->ts.type == BT_CLASS
4785 && CLASS_DATA (sym)->attr.class_pointer)
4786 || array_attr->allocatable)
4787 {
4788 if (TREE_STATIC (sym->backend_decl))
4789 {
4790 gfc_save_backend_locus (&loc);
4791 gfc_set_backend_locus (&sym->declared_at);
4792 gfc_trans_static_array_pointer (sym);
4793 gfc_restore_backend_locus (&loc);
4794 }
4795 else
4796 {
4797 seen_trans_deferred_array = true;
4798 gfc_trans_deferred_array (sym, block);
4799 }
4800 }
4801 else if (sym->attr.codimension
4802 && TREE_STATIC (sym->backend_decl))
4803 {
4804 gfc_init_block (&tmpblock);
4805 gfc_trans_array_cobounds (TREE_TYPE (sym->backend_decl),
4806 &tmpblock, sym);
4807 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock),
4808 NULL_TREE);
4809 continue;
4810 }
4811 else
4812 {
4813 gfc_save_backend_locus (&loc);
4814 gfc_set_backend_locus (&sym->declared_at);
4815
4816 if (alloc_comp_or_fini)
4817 {
4818 seen_trans_deferred_array = true;
4819 gfc_trans_deferred_array (sym, block);
4820 }
4821 else if (sym->ts.type == BT_DERIVED
4822 && sym->value
4823 && !sym->attr.data
4824 && sym->attr.save == SAVE_NONE)
4825 {
4826 gfc_start_block (&tmpblock);
4827 gfc_init_default_dt (sym, &tmpblock, false);
4828 gfc_add_init_cleanup (block,
4829 gfc_finish_block (&tmpblock),
4830 NULL_TREE);
4831 }
4832
4833 gfc_trans_auto_array_allocation (sym->backend_decl,
4834 sym, block);
4835 gfc_restore_backend_locus (&loc);
4836 }
4837 break;
4838
4839 case AS_ASSUMED_SIZE:
4840 /* Must be a dummy parameter. */
4841 gcc_assert (sym->attr.dummy || as->cp_was_assumed);
4842
4843 /* We should always pass assumed size arrays the g77 way. */
4844 if (sym->attr.dummy)
4845 gfc_trans_g77_array (sym, block);
4846 break;
4847
4848 case AS_ASSUMED_SHAPE:
4849 /* Must be a dummy parameter. */
4850 gcc_assert (sym->attr.dummy);
4851
4852 gfc_trans_dummy_array_bias (sym, sym->backend_decl, block);
4853 break;
4854
4855 case AS_ASSUMED_RANK:
4856 case AS_DEFERRED:
4857 seen_trans_deferred_array = true;
4858 gfc_trans_deferred_array (sym, block);
4859 if (sym->ts.type == BT_CHARACTER && sym->ts.deferred
4860 && sym->attr.result)
4861 {
4862 gfc_start_block (&init);
4863 gfc_save_backend_locus (&loc);
4864 gfc_set_backend_locus (&sym->declared_at);
4865 tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
4866 gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
4867 }
4868 break;
4869
4870 default:
4871 gcc_unreachable ();
4872 }
4873 if (alloc_comp_or_fini && !seen_trans_deferred_array)
4874 gfc_trans_deferred_array (sym, block);
4875 }
4876 else if ((!sym->attr.dummy || sym->ts.deferred)
4877 && (sym->ts.type == BT_CLASS
4878 && CLASS_DATA (sym)->attr.class_pointer))
4879 gfc_trans_class_array (sym, block);
4880 else if ((!sym->attr.dummy || sym->ts.deferred)
4881 && (sym->attr.allocatable
4882 || (sym->attr.pointer && sym->attr.result)
4883 || (sym->ts.type == BT_CLASS
4884 && CLASS_DATA (sym)->attr.allocatable)))
4885 {
4886 if (!sym->attr.save && flag_max_stack_var_size != 0)
4887 {
4888 tree descriptor = NULL_TREE;
4889
4890 gfc_save_backend_locus (&loc);
4891 gfc_set_backend_locus (&sym->declared_at);
4892 gfc_start_block (&init);
4893
4894 if (sym->ts.type == BT_CHARACTER
4895 && sym->attr.allocatable
4896 && !sym->attr.dimension
4897 && sym->ts.u.cl && sym->ts.u.cl->length
4898 && sym->ts.u.cl->length->expr_type == EXPR_VARIABLE)
4899 gfc_conv_string_length (sym->ts.u.cl, NULL, &init);
4900
4901 if (!sym->attr.pointer)
4902 {
4903 /* Nullify and automatic deallocation of allocatable
4904 scalars. */
4905 e = gfc_lval_expr_from_sym (sym);
4906 if (sym->ts.type == BT_CLASS)
4907 gfc_add_data_component (e);
4908
4909 gfc_init_se (&se, NULL);
4910 if (sym->ts.type != BT_CLASS
4911 || sym->ts.u.derived->attr.dimension
4912 || sym->ts.u.derived->attr.codimension)
4913 {
4914 se.want_pointer = 1;
4915 gfc_conv_expr (&se, e);
4916 }
4917 else if (sym->ts.type == BT_CLASS
4918 && !CLASS_DATA (sym)->attr.dimension
4919 && !CLASS_DATA (sym)->attr.codimension)
4920 {
4921 se.want_pointer = 1;
4922 gfc_conv_expr (&se, e);
4923 }
4924 else
4925 {
4926 se.descriptor_only = 1;
4927 gfc_conv_expr (&se, e);
4928 descriptor = se.expr;
4929 se.expr = gfc_conv_descriptor_data_addr (se.expr);
4930 se.expr = build_fold_indirect_ref_loc (input_location, se.expr);
4931 }
4932 gfc_free_expr (e);
4933
4934 if (!sym->attr.dummy || sym->attr.intent == INTENT_OUT)
4935 {
4936 /* Nullify when entering the scope. */
4937 tmp = fold_build2_loc (input_location, MODIFY_EXPR,
4938 TREE_TYPE (se.expr), se.expr,
4939 fold_convert (TREE_TYPE (se.expr),
4940 null_pointer_node));
4941 if (sym->attr.optional)
4942 {
4943 tree present = gfc_conv_expr_present (sym);
4944 tmp = build3_loc (input_location, COND_EXPR,
4945 void_type_node, present, tmp,
4946 build_empty_stmt (input_location));
4947 }
4948 gfc_add_expr_to_block (&init, tmp);
4949 }
4950 }
4951
4952 if ((sym->attr.dummy || sym->attr.result)
4953 && sym->ts.type == BT_CHARACTER
4954 && sym->ts.deferred
4955 && sym->ts.u.cl->passed_length)
4956 tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
4957 else
4958 {
4959 gfc_restore_backend_locus (&loc);
4960 tmp = NULL_TREE;
4961 }
4962
4963 /* Initialize descriptor's TKR information. */
4964 if (sym->ts.type == BT_CLASS)
4965 gfc_trans_class_array (sym, block);
4966
4967 /* Deallocate when leaving the scope. Nullifying is not
4968 needed. */
4969 if (!sym->attr.result && !sym->attr.dummy && !sym->attr.pointer
4970 && !sym->ns->proc_name->attr.is_main_program)
4971 {
4972 if (sym->ts.type == BT_CLASS
4973 && CLASS_DATA (sym)->attr.codimension)
4974 tmp = gfc_deallocate_with_status (descriptor, NULL_TREE,
4975 NULL_TREE, NULL_TREE,
4976 NULL_TREE, true, NULL,
4977 GFC_CAF_COARRAY_ANALYZE);
4978 else
4979 {
4980 gfc_expr *expr = gfc_lval_expr_from_sym (sym);
4981 tmp = gfc_deallocate_scalar_with_status (se.expr,
4982 NULL_TREE,
4983 NULL_TREE,
4984 true, expr,
4985 sym->ts);
4986 gfc_free_expr (expr);
4987 }
4988 }
4989
4990 if (sym->ts.type == BT_CLASS)
4991 {
4992 /* Initialize _vptr to declared type. */
4993 gfc_symbol *vtab;
4994 tree rhs;
4995
4996 gfc_save_backend_locus (&loc);
4997 gfc_set_backend_locus (&sym->declared_at);
4998 e = gfc_lval_expr_from_sym (sym);
4999 gfc_add_vptr_component (e);
5000 gfc_init_se (&se, NULL);
5001 se.want_pointer = 1;
5002 gfc_conv_expr (&se, e);
5003 gfc_free_expr (e);
5004 if (UNLIMITED_POLY (sym))
5005 rhs = build_int_cst (TREE_TYPE (se.expr), 0);
5006 else
5007 {
5008 vtab = gfc_find_derived_vtab (sym->ts.u.derived);
5009 rhs = gfc_build_addr_expr (TREE_TYPE (se.expr),
5010 gfc_get_symbol_decl (vtab));
5011 }
5012 gfc_add_modify (&init, se.expr, rhs);
5013 gfc_restore_backend_locus (&loc);
5014 }
5015
5016 gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
5017 }
5018 }
5019 else if (sym->ts.type == BT_CHARACTER && sym->ts.deferred)
5020 {
5021 tree tmp = NULL;
5022 stmtblock_t init;
5023
5024 /* If we get to here, all that should be left are pointers. */
5025 gcc_assert (sym->attr.pointer);
5026
5027 if (sym->attr.dummy)
5028 {
5029 gfc_start_block (&init);
5030 gfc_save_backend_locus (&loc);
5031 gfc_set_backend_locus (&sym->declared_at);
5032 tmp = gfc_null_and_pass_deferred_len (sym, &init, &loc);
5033 gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp);
5034 }
5035 }
5036 else if (sym->ts.deferred)
5037 gfc_fatal_error ("Deferred type parameter not yet supported");
5038 else if (alloc_comp_or_fini)
5039 gfc_trans_deferred_array (sym, block);
5040 else if (sym->ts.type == BT_CHARACTER)
5041 {
5042 gfc_save_backend_locus (&loc);
5043 gfc_set_backend_locus (&sym->declared_at);
5044 if (sym->attr.dummy || sym->attr.result)
5045 gfc_trans_dummy_character (sym, sym->ts.u.cl, block);
5046 else
5047 gfc_trans_auto_character_variable (sym, block);
5048 gfc_restore_backend_locus (&loc);
5049 }
5050 else if (sym->attr.assign)
5051 {
5052 gfc_save_backend_locus (&loc);
5053 gfc_set_backend_locus (&sym->declared_at);
5054 gfc_trans_assign_aux_var (sym, block);
5055 gfc_restore_backend_locus (&loc);
5056 }
5057 else if (sym->ts.type == BT_DERIVED
5058 && sym->value
5059 && !sym->attr.data
5060 && sym->attr.save == SAVE_NONE)
5061 {
5062 gfc_start_block (&tmpblock);
5063 gfc_init_default_dt (sym, &tmpblock, false);
5064 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock),
5065 NULL_TREE);
5066 }
5067 else if (!(UNLIMITED_POLY(sym)) && !is_pdt_type)
5068 gcc_unreachable ();
5069 }
5070
5071 gfc_init_block (&tmpblock);
5072
5073 for (f = gfc_sym_get_dummy_args (proc_sym); f; f = f->next)
5074 {
5075 if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER
5076 && f->sym->ts.u.cl->backend_decl)
5077 {
5078 if (TREE_CODE (f->sym->ts.u.cl->backend_decl) == PARM_DECL)
5079 gfc_trans_vla_type_sizes (f->sym, &tmpblock);
5080 }
5081 }
5082
5083 if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER
5084 && current_fake_result_decl != NULL)
5085 {
5086 gcc_assert (proc_sym->ts.u.cl->backend_decl != NULL);
5087 if (TREE_CODE (proc_sym->ts.u.cl->backend_decl) == PARM_DECL)
5088 gfc_trans_vla_type_sizes (proc_sym, &tmpblock);
5089 }
5090
5091 gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE);
5092 }
5093
5094
5095 struct module_hasher : ggc_ptr_hash<module_htab_entry>
5096 {
5097 typedef const char *compare_type;
5098
5099 static hashval_t hash (module_htab_entry *s)
5100 {
5101 return htab_hash_string (s->name);
5102 }
5103
5104 static bool
5105 equal (module_htab_entry *a, const char *b)
5106 {
5107 return !strcmp (a->name, b);
5108 }
5109 };
5110
5111 static GTY (()) hash_table<module_hasher> *module_htab;
5112
5113 /* Hash and equality functions for module_htab's decls. */
5114
5115 hashval_t
5116 module_decl_hasher::hash (tree t)
5117 {
5118 const_tree n = DECL_NAME (t);
5119 if (n == NULL_TREE)
5120 n = TYPE_NAME (TREE_TYPE (t));
5121 return htab_hash_string (IDENTIFIER_POINTER (n));
5122 }
5123
5124 bool
5125 module_decl_hasher::equal (tree t1, const char *x2)
5126 {
5127 const_tree n1 = DECL_NAME (t1);
5128 if (n1 == NULL_TREE)
5129 n1 = TYPE_NAME (TREE_TYPE (t1));
5130 return strcmp (IDENTIFIER_POINTER (n1), x2) == 0;
5131 }
5132
5133 struct module_htab_entry *
5134 gfc_find_module (const char *name)
5135 {
5136 if (! module_htab)
5137 module_htab = hash_table<module_hasher>::create_ggc (10);
5138
5139 module_htab_entry **slot
5140 = module_htab->find_slot_with_hash (name, htab_hash_string (name), INSERT);
5141 if (*slot == NULL)
5142 {
5143 module_htab_entry *entry = ggc_cleared_alloc<module_htab_entry> ();
5144
5145 entry->name = gfc_get_string ("%s", name);
5146 entry->decls = hash_table<module_decl_hasher>::create_ggc (10);
5147 *slot = entry;
5148 }
5149 return *slot;
5150 }
5151
5152 void
5153 gfc_module_add_decl (struct module_htab_entry *entry, tree decl)
5154 {
5155 const char *name;
5156
5157 if (DECL_NAME (decl))
5158 name = IDENTIFIER_POINTER (DECL_NAME (decl));
5159 else
5160 {
5161 gcc_assert (TREE_CODE (decl) == TYPE_DECL);
5162 name = IDENTIFIER_POINTER (TYPE_NAME (TREE_TYPE (decl)));
5163 }
5164 tree *slot
5165 = entry->decls->find_slot_with_hash (name, htab_hash_string (name),
5166 INSERT);
5167 if (*slot == NULL)
5168 *slot = decl;
5169 }
5170
5171
5172 /* Generate debugging symbols for namelists. This function must come after
5173 generate_local_decl to ensure that the variables in the namelist are
5174 already declared. */
5175
5176 static tree
5177 generate_namelist_decl (gfc_symbol * sym)
5178 {
5179 gfc_namelist *nml;
5180 tree decl;
5181 vec<constructor_elt, va_gc> *nml_decls = NULL;
5182
5183 gcc_assert (sym->attr.flavor == FL_NAMELIST);
5184 for (nml = sym->namelist; nml; nml = nml->next)
5185 {
5186 if (nml->sym->backend_decl == NULL_TREE)
5187 {
5188 nml->sym->attr.referenced = 1;
5189 nml->sym->backend_decl = gfc_get_symbol_decl (nml->sym);
5190 }
5191 DECL_IGNORED_P (nml->sym->backend_decl) = 0;
5192 CONSTRUCTOR_APPEND_ELT (nml_decls, NULL_TREE, nml->sym->backend_decl);
5193 }
5194
5195 decl = make_node (NAMELIST_DECL);
5196 TREE_TYPE (decl) = void_type_node;
5197 NAMELIST_DECL_ASSOCIATED_DECL (decl) = build_constructor (NULL_TREE, nml_decls);
5198 DECL_NAME (decl) = get_identifier (sym->name);
5199 return decl;
5200 }
5201
5202
5203 /* Output an initialized decl for a module variable. */
5204
5205 static void
5206 gfc_create_module_variable (gfc_symbol * sym)
5207 {
5208 tree decl;
5209
5210 /* Module functions with alternate entries are dealt with later and
5211 would get caught by the next condition. */
5212 if (sym->attr.entry)
5213 return;
5214
5215 /* Make sure we convert the types of the derived types from iso_c_binding
5216 into (void *). */
5217 if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c
5218 && sym->ts.type == BT_DERIVED)
5219 sym->backend_decl = gfc_typenode_for_spec (&(sym->ts));
5220
5221 if (gfc_fl_struct (sym->attr.flavor)
5222 && sym->backend_decl
5223 && TREE_CODE (sym->backend_decl) == RECORD_TYPE)
5224 {
5225 decl = sym->backend_decl;
5226 gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE);
5227
5228 if (!sym->attr.use_assoc && !sym->attr.used_in_submodule)
5229 {
5230 gcc_assert (TYPE_CONTEXT (decl) == NULL_TREE
5231 || TYPE_CONTEXT (decl) == sym->ns->proc_name->backend_decl);
5232 gcc_assert (DECL_CONTEXT (TYPE_STUB_DECL (decl)) == NULL_TREE
5233 || DECL_CONTEXT (TYPE_STUB_DECL (decl))
5234 == sym->ns->proc_name->backend_decl);
5235 }
5236 TYPE_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
5237 DECL_CONTEXT (TYPE_STUB_DECL (decl)) = sym->ns->proc_name->backend_decl;
5238 gfc_module_add_decl (cur_module, TYPE_STUB_DECL (decl));
5239 }
5240
5241 /* Only output variables, procedure pointers and array valued,
5242 or derived type, parameters. */
5243 if (sym->attr.flavor != FL_VARIABLE
5244 && !(sym->attr.flavor == FL_PARAMETER
5245 && (sym->attr.dimension || sym->ts.type == BT_DERIVED))
5246 && !(sym->attr.flavor == FL_PROCEDURE && sym->attr.proc_pointer))
5247 return;
5248
5249 if ((sym->attr.in_common || sym->attr.in_equivalence) && sym->backend_decl)
5250 {
5251 decl = sym->backend_decl;
5252 gcc_assert (DECL_FILE_SCOPE_P (decl));
5253 gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE);
5254 DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
5255 gfc_module_add_decl (cur_module, decl);
5256 }
5257
5258 /* Don't generate variables from other modules. Variables from
5259 COMMONs and Cray pointees will already have been generated. */
5260 if (sym->attr.use_assoc || sym->attr.used_in_submodule
5261 || sym->attr.in_common || sym->attr.cray_pointee)
5262 return;
5263
5264 /* Equivalenced variables arrive here after creation. */
5265 if (sym->backend_decl
5266 && (sym->equiv_built || sym->attr.in_equivalence))
5267 return;
5268
5269 if (sym->backend_decl && !sym->attr.vtab && !sym->attr.target)
5270 gfc_internal_error ("backend decl for module variable %qs already exists",
5271 sym->name);
5272
5273 if (sym->module && !sym->attr.result && !sym->attr.dummy
5274 && (sym->attr.access == ACCESS_UNKNOWN
5275 && (sym->ns->default_access == ACCESS_PRIVATE
5276 || (sym->ns->default_access == ACCESS_UNKNOWN
5277 && flag_module_private))))
5278 sym->attr.access = ACCESS_PRIVATE;
5279
5280 if (warn_unused_variable && !sym->attr.referenced
5281 && sym->attr.access == ACCESS_PRIVATE)
5282 gfc_warning (OPT_Wunused_value,
5283 "Unused PRIVATE module variable %qs declared at %L",
5284 sym->name, &sym->declared_at);
5285
5286 /* We always want module variables to be created. */
5287 sym->attr.referenced = 1;
5288 /* Create the decl. */
5289 decl = gfc_get_symbol_decl (sym);
5290
5291 /* Create the variable. */
5292 pushdecl (decl);
5293 gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE
5294 || (sym->ns->parent->proc_name->attr.flavor == FL_MODULE
5295 && sym->fn_result_spec));
5296 DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
5297 rest_of_decl_compilation (decl, 1, 0);
5298 gfc_module_add_decl (cur_module, decl);
5299
5300 /* Also add length of strings. */
5301 if (sym->ts.type == BT_CHARACTER)
5302 {
5303 tree length;
5304
5305 length = sym->ts.u.cl->backend_decl;
5306 gcc_assert (length || sym->attr.proc_pointer);
5307 if (length && !INTEGER_CST_P (length))
5308 {
5309 pushdecl (length);
5310 rest_of_decl_compilation (length, 1, 0);
5311 }
5312 }
5313
5314 if (sym->attr.codimension && !sym->attr.dummy && !sym->attr.allocatable
5315 && sym->attr.referenced && !sym->attr.use_assoc)
5316 has_coarray_vars = true;
5317 }
5318
5319 /* Emit debug information for USE statements. */
5320
5321 static void
5322 gfc_trans_use_stmts (gfc_namespace * ns)
5323 {
5324 gfc_use_list *use_stmt;
5325 for (use_stmt = ns->use_stmts; use_stmt; use_stmt = use_stmt->next)
5326 {
5327 struct module_htab_entry *entry
5328 = gfc_find_module (use_stmt->module_name);
5329 gfc_use_rename *rent;
5330
5331 if (entry->namespace_decl == NULL)
5332 {
5333 entry->namespace_decl
5334 = build_decl (input_location,
5335 NAMESPACE_DECL,
5336 get_identifier (use_stmt->module_name),
5337 void_type_node);
5338 DECL_EXTERNAL (entry->namespace_decl) = 1;
5339 }
5340 gfc_set_backend_locus (&use_stmt->where);
5341 if (!use_stmt->only_flag)
5342 (*debug_hooks->imported_module_or_decl) (entry->namespace_decl,
5343 NULL_TREE,
5344 ns->proc_name->backend_decl,
5345 false, false);
5346 for (rent = use_stmt->rename; rent; rent = rent->next)
5347 {
5348 tree decl, local_name;
5349
5350 if (rent->op != INTRINSIC_NONE)
5351 continue;
5352
5353 hashval_t hash = htab_hash_string (rent->use_name);
5354 tree *slot = entry->decls->find_slot_with_hash (rent->use_name, hash,
5355 INSERT);
5356 if (*slot == NULL)
5357 {
5358 gfc_symtree *st;
5359
5360 st = gfc_find_symtree (ns->sym_root,
5361 rent->local_name[0]
5362 ? rent->local_name : rent->use_name);
5363
5364 /* The following can happen if a derived type is renamed. */
5365 if (!st)
5366 {
5367 char *name;
5368 name = xstrdup (rent->local_name[0]
5369 ? rent->local_name : rent->use_name);
5370 name[0] = (char) TOUPPER ((unsigned char) name[0]);
5371 st = gfc_find_symtree (ns->sym_root, name);
5372 free (name);
5373 gcc_assert (st);
5374 }
5375
5376 /* Sometimes, generic interfaces wind up being over-ruled by a
5377 local symbol (see PR41062). */
5378 if (!st->n.sym->attr.use_assoc)
5379 {
5380 *slot = error_mark_node;
5381 entry->decls->clear_slot (slot);
5382 continue;
5383 }
5384
5385 if (st->n.sym->backend_decl
5386 && DECL_P (st->n.sym->backend_decl)
5387 && st->n.sym->module
5388 && strcmp (st->n.sym->module, use_stmt->module_name) == 0)
5389 {
5390 gcc_assert (DECL_EXTERNAL (entry->namespace_decl)
5391 || !VAR_P (st->n.sym->backend_decl));
5392 decl = copy_node (st->n.sym->backend_decl);
5393 DECL_CONTEXT (decl) = entry->namespace_decl;
5394 DECL_EXTERNAL (decl) = 1;
5395 DECL_IGNORED_P (decl) = 0;
5396 DECL_INITIAL (decl) = NULL_TREE;
5397 }
5398 else if (st->n.sym->attr.flavor == FL_NAMELIST
5399 && st->n.sym->attr.use_only
5400 && st->n.sym->module
5401 && strcmp (st->n.sym->module, use_stmt->module_name)
5402 == 0)
5403 {
5404 decl = generate_namelist_decl (st->n.sym);
5405 DECL_CONTEXT (decl) = entry->namespace_decl;
5406 DECL_EXTERNAL (decl) = 1;
5407 DECL_IGNORED_P (decl) = 0;
5408 DECL_INITIAL (decl) = NULL_TREE;
5409 }
5410 else
5411 {
5412 *slot = error_mark_node;
5413 entry->decls->clear_slot (slot);
5414 continue;
5415 }
5416 *slot = decl;
5417 }
5418 decl = (tree) *slot;
5419 if (rent->local_name[0])
5420 local_name = get_identifier (rent->local_name);
5421 else
5422 local_name = NULL_TREE;
5423 gfc_set_backend_locus (&rent->where);
5424 (*debug_hooks->imported_module_or_decl) (decl, local_name,
5425 ns->proc_name->backend_decl,
5426 !use_stmt->only_flag,
5427 false);
5428 }
5429 }
5430 }
5431
5432
5433 /* Return true if expr is a constant initializer that gfc_conv_initializer
5434 will handle. */
5435
5436 static bool
5437 check_constant_initializer (gfc_expr *expr, gfc_typespec *ts, bool array,
5438 bool pointer)
5439 {
5440 gfc_constructor *c;
5441 gfc_component *cm;
5442
5443 if (pointer)
5444 return true;
5445 else if (array)
5446 {
5447 if (expr->expr_type == EXPR_CONSTANT || expr->expr_type == EXPR_NULL)
5448 return true;
5449 else if (expr->expr_type == EXPR_STRUCTURE)
5450 return check_constant_initializer (expr, ts, false, false);
5451 else if (expr->expr_type != EXPR_ARRAY)
5452 return false;
5453 for (c = gfc_constructor_first (expr->value.constructor);
5454 c; c = gfc_constructor_next (c))
5455 {
5456 if (c->iterator)
5457 return false;
5458 if (c->expr->expr_type == EXPR_STRUCTURE)
5459 {
5460 if (!check_constant_initializer (c->expr, ts, false, false))
5461 return false;
5462 }
5463 else if (c->expr->expr_type != EXPR_CONSTANT)
5464 return false;
5465 }
5466 return true;
5467 }
5468 else switch (ts->type)
5469 {
5470 case_bt_struct:
5471 if (expr->expr_type != EXPR_STRUCTURE)
5472 return false;
5473 cm = expr->ts.u.derived->components;
5474 for (c = gfc_constructor_first (expr->value.constructor);
5475 c; c = gfc_constructor_next (c), cm = cm->next)
5476 {
5477 if (!c->expr || cm->attr.allocatable)
5478 continue;
5479 if (!check_constant_initializer (c->expr, &cm->ts,
5480 cm->attr.dimension,
5481 cm->attr.pointer))
5482 return false;
5483 }
5484 return true;
5485 default:
5486 return expr->expr_type == EXPR_CONSTANT;
5487 }
5488 }
5489
5490 /* Emit debug info for parameters and unreferenced variables with
5491 initializers. */
5492
5493 static void
5494 gfc_emit_parameter_debug_info (gfc_symbol *sym)
5495 {
5496 tree decl;
5497
5498 if (sym->attr.flavor != FL_PARAMETER
5499 && (sym->attr.flavor != FL_VARIABLE || sym->attr.referenced))
5500 return;
5501
5502 if (sym->backend_decl != NULL
5503 || sym->value == NULL
5504 || sym->attr.use_assoc
5505 || sym->attr.dummy
5506 || sym->attr.result
5507 || sym->attr.function
5508 || sym->attr.intrinsic
5509 || sym->attr.pointer
5510 || sym->attr.allocatable
5511 || sym->attr.cray_pointee
5512 || sym->attr.threadprivate
5513 || sym->attr.is_bind_c
5514 || sym->attr.subref_array_pointer
5515 || sym->attr.assign)
5516 return;
5517
5518 if (sym->ts.type == BT_CHARACTER)
5519 {
5520 gfc_conv_const_charlen (sym->ts.u.cl);
5521 if (sym->ts.u.cl->backend_decl == NULL
5522 || TREE_CODE (sym->ts.u.cl->backend_decl) != INTEGER_CST)
5523 return;
5524 }
5525 else if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.alloc_comp)
5526 return;
5527
5528 if (sym->as)
5529 {
5530 int n;
5531
5532 if (sym->as->type != AS_EXPLICIT)
5533 return;
5534 for (n = 0; n < sym->as->rank; n++)
5535 if (sym->as->lower[n]->expr_type != EXPR_CONSTANT
5536 || sym->as->upper[n] == NULL
5537 || sym->as->upper[n]->expr_type != EXPR_CONSTANT)
5538 return;
5539 }
5540
5541 if (!check_constant_initializer (sym->value, &sym->ts,
5542 sym->attr.dimension, false))
5543 return;
5544
5545 if (flag_coarray == GFC_FCOARRAY_LIB && sym->attr.codimension)
5546 return;
5547
5548 /* Create the decl for the variable or constant. */
5549 decl = build_decl (input_location,
5550 sym->attr.flavor == FL_PARAMETER ? CONST_DECL : VAR_DECL,
5551 gfc_sym_identifier (sym), gfc_sym_type (sym));
5552 if (sym->attr.flavor == FL_PARAMETER)
5553 TREE_READONLY (decl) = 1;
5554 gfc_set_decl_location (decl, &sym->declared_at);
5555 if (sym->attr.dimension)
5556 GFC_DECL_PACKED_ARRAY (decl) = 1;
5557 DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
5558 TREE_STATIC (decl) = 1;
5559 TREE_USED (decl) = 1;
5560 if (DECL_CONTEXT (decl) && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL)
5561 TREE_PUBLIC (decl) = 1;
5562 DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
5563 TREE_TYPE (decl),
5564 sym->attr.dimension,
5565 false, false);
5566 debug_hooks->early_global_decl (decl);
5567 }
5568
5569
5570 static void
5571 generate_coarray_sym_init (gfc_symbol *sym)
5572 {
5573 tree tmp, size, decl, token, desc;
5574 bool is_lock_type, is_event_type;
5575 int reg_type;
5576 gfc_se se;
5577 symbol_attribute attr;
5578
5579 if (sym->attr.dummy || sym->attr.allocatable || !sym->attr.codimension
5580 || sym->attr.use_assoc || !sym->attr.referenced
5581 || sym->attr.associate_var
5582 || sym->attr.select_type_temporary)
5583 return;
5584
5585 decl = sym->backend_decl;
5586 TREE_USED(decl) = 1;
5587 gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (decl)));
5588
5589 is_lock_type = sym->ts.type == BT_DERIVED
5590 && sym->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
5591 && sym->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE;
5592
5593 is_event_type = sym->ts.type == BT_DERIVED
5594 && sym->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
5595 && sym->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE;
5596
5597 /* FIXME: Workaround for PR middle-end/49106, cf. also PR middle-end/49108
5598 to make sure the variable is not optimized away. */
5599 DECL_PRESERVE_P (DECL_CONTEXT (decl)) = 1;
5600
5601 /* For lock types, we pass the array size as only the library knows the
5602 size of the variable. */
5603 if (is_lock_type || is_event_type)
5604 size = gfc_index_one_node;
5605 else
5606 size = TYPE_SIZE_UNIT (gfc_get_element_type (TREE_TYPE (decl)));
5607
5608 /* Ensure that we do not have size=0 for zero-sized arrays. */
5609 size = fold_build2_loc (input_location, MAX_EXPR, size_type_node,
5610 fold_convert (size_type_node, size),
5611 build_int_cst (size_type_node, 1));
5612
5613 if (GFC_TYPE_ARRAY_RANK (TREE_TYPE (decl)))
5614 {
5615 tmp = GFC_TYPE_ARRAY_SIZE (TREE_TYPE (decl));
5616 size = fold_build2_loc (input_location, MULT_EXPR, size_type_node,
5617 fold_convert (size_type_node, tmp), size);
5618 }
5619
5620 gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (decl)) != NULL_TREE);
5621 token = gfc_build_addr_expr (ppvoid_type_node,
5622 GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE(decl)));
5623 if (is_lock_type)
5624 reg_type = sym->attr.artificial ? GFC_CAF_CRITICAL : GFC_CAF_LOCK_STATIC;
5625 else if (is_event_type)
5626 reg_type = GFC_CAF_EVENT_STATIC;
5627 else
5628 reg_type = GFC_CAF_COARRAY_STATIC;
5629
5630 /* Compile the symbol attribute. */
5631 if (sym->ts.type == BT_CLASS)
5632 {
5633 attr = CLASS_DATA (sym)->attr;
5634 /* The pointer attribute is always set on classes, overwrite it with the
5635 class_pointer attribute, which denotes the pointer for classes. */
5636 attr.pointer = attr.class_pointer;
5637 }
5638 else
5639 attr = sym->attr;
5640 gfc_init_se (&se, NULL);
5641 desc = gfc_conv_scalar_to_descriptor (&se, decl, attr);
5642 gfc_add_block_to_block (&caf_init_block, &se.pre);
5643
5644 tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_register, 7, size,
5645 build_int_cst (integer_type_node, reg_type),
5646 token, gfc_build_addr_expr (pvoid_type_node, desc),
5647 null_pointer_node, /* stat. */
5648 null_pointer_node, /* errgmsg. */
5649 build_zero_cst (size_type_node)); /* errmsg_len. */
5650 gfc_add_expr_to_block (&caf_init_block, tmp);
5651 gfc_add_modify (&caf_init_block, decl, fold_convert (TREE_TYPE (decl),
5652 gfc_conv_descriptor_data_get (desc)));
5653
5654 /* Handle "static" initializer. */
5655 if (sym->value)
5656 {
5657 if (sym->value->expr_type == EXPR_ARRAY)
5658 {
5659 gfc_constructor *c, *cnext;
5660
5661 /* Test if the array has more than one element. */
5662 c = gfc_constructor_first (sym->value->value.constructor);
5663 gcc_assert (c); /* Empty constructor should not happen here. */
5664 cnext = gfc_constructor_next (c);
5665
5666 if (cnext)
5667 {
5668 /* An EXPR_ARRAY with a rank > 1 here has to come from a
5669 DATA statement. Set its rank here as not to confuse
5670 the following steps. */
5671 sym->value->rank = 1;
5672 }
5673 else
5674 {
5675 /* There is only a single value in the constructor, use
5676 it directly for the assignment. */
5677 gfc_expr *new_expr;
5678 new_expr = gfc_copy_expr (c->expr);
5679 gfc_free_expr (sym->value);
5680 sym->value = new_expr;
5681 }
5682 }
5683
5684 sym->attr.pointer = 1;
5685 tmp = gfc_trans_assignment (gfc_lval_expr_from_sym (sym), sym->value,
5686 true, false);
5687 sym->attr.pointer = 0;
5688 gfc_add_expr_to_block (&caf_init_block, tmp);
5689 }
5690 else if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.pointer_comp)
5691 {
5692 tmp = gfc_nullify_alloc_comp (sym->ts.u.derived, decl, sym->as
5693 ? sym->as->rank : 0,
5694 GFC_STRUCTURE_CAF_MODE_IN_COARRAY);
5695 gfc_add_expr_to_block (&caf_init_block, tmp);
5696 }
5697 }
5698
5699
5700 /* Generate constructor function to initialize static, nonallocatable
5701 coarrays. */
5702
5703 static void
5704 generate_coarray_init (gfc_namespace * ns __attribute((unused)))
5705 {
5706 tree fndecl, tmp, decl, save_fn_decl;
5707
5708 save_fn_decl = current_function_decl;
5709 push_function_context ();
5710
5711 tmp = build_function_type_list (void_type_node, NULL_TREE);
5712 fndecl = build_decl (input_location, FUNCTION_DECL,
5713 create_tmp_var_name ("_caf_init"), tmp);
5714
5715 DECL_STATIC_CONSTRUCTOR (fndecl) = 1;
5716 SET_DECL_INIT_PRIORITY (fndecl, DEFAULT_INIT_PRIORITY);
5717
5718 decl = build_decl (input_location, RESULT_DECL, NULL_TREE, void_type_node);
5719 DECL_ARTIFICIAL (decl) = 1;
5720 DECL_IGNORED_P (decl) = 1;
5721 DECL_CONTEXT (decl) = fndecl;
5722 DECL_RESULT (fndecl) = decl;
5723
5724 pushdecl (fndecl);
5725 current_function_decl = fndecl;
5726 announce_function (fndecl);
5727
5728 rest_of_decl_compilation (fndecl, 0, 0);
5729 make_decl_rtl (fndecl);
5730 allocate_struct_function (fndecl, false);
5731
5732 pushlevel ();
5733 gfc_init_block (&caf_init_block);
5734
5735 gfc_traverse_ns (ns, generate_coarray_sym_init);
5736
5737 DECL_SAVED_TREE (fndecl) = gfc_finish_block (&caf_init_block);
5738 decl = getdecls ();
5739
5740 poplevel (1, 1);
5741 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
5742
5743 DECL_SAVED_TREE (fndecl)
5744 = fold_build3_loc (DECL_SOURCE_LOCATION (fndecl), BIND_EXPR, void_type_node,
5745 decl, DECL_SAVED_TREE (fndecl), DECL_INITIAL (fndecl));
5746 dump_function (TDI_original, fndecl);
5747
5748 cfun->function_end_locus = input_location;
5749 set_cfun (NULL);
5750
5751 if (decl_function_context (fndecl))
5752 (void) cgraph_node::create (fndecl);
5753 else
5754 cgraph_node::finalize_function (fndecl, true);
5755
5756 pop_function_context ();
5757 current_function_decl = save_fn_decl;
5758 }
5759
5760
5761 static void
5762 create_module_nml_decl (gfc_symbol *sym)
5763 {
5764 if (sym->attr.flavor == FL_NAMELIST)
5765 {
5766 tree decl = generate_namelist_decl (sym);
5767 pushdecl (decl);
5768 gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE);
5769 DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl;
5770 rest_of_decl_compilation (decl, 1, 0);
5771 gfc_module_add_decl (cur_module, decl);
5772 }
5773 }
5774
5775
5776 /* Generate all the required code for module variables. */
5777
5778 void
5779 gfc_generate_module_vars (gfc_namespace * ns)
5780 {
5781 module_namespace = ns;
5782 cur_module = gfc_find_module (ns->proc_name->name);
5783
5784 /* Check if the frontend left the namespace in a reasonable state. */
5785 gcc_assert (ns->proc_name && !ns->proc_name->tlink);
5786
5787 /* Generate COMMON blocks. */
5788 gfc_trans_common (ns);
5789
5790 has_coarray_vars = false;
5791
5792 /* Create decls for all the module variables. */
5793 gfc_traverse_ns (ns, gfc_create_module_variable);
5794 gfc_traverse_ns (ns, create_module_nml_decl);
5795
5796 if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
5797 generate_coarray_init (ns);
5798
5799 cur_module = NULL;
5800
5801 gfc_trans_use_stmts (ns);
5802 gfc_traverse_ns (ns, gfc_emit_parameter_debug_info);
5803 }
5804
5805
5806 static void
5807 gfc_generate_contained_functions (gfc_namespace * parent)
5808 {
5809 gfc_namespace *ns;
5810
5811 /* We create all the prototypes before generating any code. */
5812 for (ns = parent->contained; ns; ns = ns->sibling)
5813 {
5814 /* Skip namespaces from used modules. */
5815 if (ns->parent != parent)
5816 continue;
5817
5818 gfc_create_function_decl (ns, false);
5819 }
5820
5821 for (ns = parent->contained; ns; ns = ns->sibling)
5822 {
5823 /* Skip namespaces from used modules. */
5824 if (ns->parent != parent)
5825 continue;
5826
5827 gfc_generate_function_code (ns);
5828 }
5829 }
5830
5831
5832 /* Drill down through expressions for the array specification bounds and
5833 character length calling generate_local_decl for all those variables
5834 that have not already been declared. */
5835
5836 static void
5837 generate_local_decl (gfc_symbol *);
5838
5839 /* Traverse expr, marking all EXPR_VARIABLE symbols referenced. */
5840
5841 static bool
5842 expr_decls (gfc_expr *e, gfc_symbol *sym,
5843 int *f ATTRIBUTE_UNUSED)
5844 {
5845 if (e->expr_type != EXPR_VARIABLE
5846 || sym == e->symtree->n.sym
5847 || e->symtree->n.sym->mark
5848 || e->symtree->n.sym->ns != sym->ns)
5849 return false;
5850
5851 generate_local_decl (e->symtree->n.sym);
5852 return false;
5853 }
5854
5855 static void
5856 generate_expr_decls (gfc_symbol *sym, gfc_expr *e)
5857 {
5858 gfc_traverse_expr (e, sym, expr_decls, 0);
5859 }
5860
5861
5862 /* Check for dependencies in the character length and array spec. */
5863
5864 static void
5865 generate_dependency_declarations (gfc_symbol *sym)
5866 {
5867 int i;
5868
5869 if (sym->ts.type == BT_CHARACTER
5870 && sym->ts.u.cl
5871 && sym->ts.u.cl->length
5872 && sym->ts.u.cl->length->expr_type != EXPR_CONSTANT)
5873 generate_expr_decls (sym, sym->ts.u.cl->length);
5874
5875 if (sym->as && sym->as->rank)
5876 {
5877 for (i = 0; i < sym->as->rank; i++)
5878 {
5879 generate_expr_decls (sym, sym->as->lower[i]);
5880 generate_expr_decls (sym, sym->as->upper[i]);
5881 }
5882 }
5883 }
5884
5885
5886 /* Generate decls for all local variables. We do this to ensure correct
5887 handling of expressions which only appear in the specification of
5888 other functions. */
5889
5890 static void
5891 generate_local_decl (gfc_symbol * sym)
5892 {
5893 if (sym->attr.flavor == FL_VARIABLE)
5894 {
5895 if (sym->attr.codimension && !sym->attr.dummy && !sym->attr.allocatable
5896 && sym->attr.referenced && !sym->attr.use_assoc)
5897 has_coarray_vars = true;
5898
5899 if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master)
5900 generate_dependency_declarations (sym);
5901
5902 if (sym->attr.ext_attr & (1 << EXT_ATTR_WEAK))
5903 {
5904 if (sym->attr.dummy)
5905 gfc_error ("Symbol %qs at %L has the WEAK attribute but is a "
5906 "dummy argument", sym->name, &sym->declared_at);
5907 else
5908 gfc_error ("Symbol %qs at %L has the WEAK attribute but is a "
5909 "local variable", sym->name, &sym->declared_at);
5910 }
5911
5912 if (sym->attr.referenced)
5913 gfc_get_symbol_decl (sym);
5914
5915 /* Warnings for unused dummy arguments. */
5916 else if (sym->attr.dummy && !sym->attr.in_namelist)
5917 {
5918 /* INTENT(out) dummy arguments are likely meant to be set. */
5919 if (warn_unused_dummy_argument && sym->attr.intent == INTENT_OUT)
5920 {
5921 if (sym->ts.type != BT_DERIVED)
5922 gfc_warning (OPT_Wunused_dummy_argument,
5923 "Dummy argument %qs at %L was declared "
5924 "INTENT(OUT) but was not set", sym->name,
5925 &sym->declared_at);
5926 else if (!gfc_has_default_initializer (sym->ts.u.derived)
5927 && !sym->ts.u.derived->attr.zero_comp)
5928 gfc_warning (OPT_Wunused_dummy_argument,
5929 "Derived-type dummy argument %qs at %L was "
5930 "declared INTENT(OUT) but was not set and "
5931 "does not have a default initializer",
5932 sym->name, &sym->declared_at);
5933 if (sym->backend_decl != NULL_TREE)
5934 suppress_warning (sym->backend_decl);
5935 }
5936 else if (warn_unused_dummy_argument)
5937 {
5938 if (!sym->attr.artificial)
5939 gfc_warning (OPT_Wunused_dummy_argument,
5940 "Unused dummy argument %qs at %L", sym->name,
5941 &sym->declared_at);
5942
5943 if (sym->backend_decl != NULL_TREE)
5944 suppress_warning (sym->backend_decl);
5945 }
5946 }
5947
5948 /* Warn for unused variables, but not if they're inside a common
5949 block or a namelist. */
5950 else if (warn_unused_variable
5951 && !(sym->attr.in_common || sym->mark || sym->attr.in_namelist))
5952 {
5953 if (sym->attr.use_only)
5954 {
5955 gfc_warning (OPT_Wunused_variable,
5956 "Unused module variable %qs which has been "
5957 "explicitly imported at %L", sym->name,
5958 &sym->declared_at);
5959 if (sym->backend_decl != NULL_TREE)
5960 suppress_warning (sym->backend_decl);
5961 }
5962 else if (!sym->attr.use_assoc)
5963 {
5964 /* Corner case: the symbol may be an entry point. At this point,
5965 it may appear to be an unused variable. Suppress warning. */
5966 bool enter = false;
5967 gfc_entry_list *el;
5968
5969 for (el = sym->ns->entries; el; el=el->next)
5970 if (strcmp(sym->name, el->sym->name) == 0)
5971 enter = true;
5972
5973 if (!enter)
5974 gfc_warning (OPT_Wunused_variable,
5975 "Unused variable %qs declared at %L",
5976 sym->name, &sym->declared_at);
5977 if (sym->backend_decl != NULL_TREE)
5978 suppress_warning (sym->backend_decl);
5979 }
5980 }
5981
5982 /* For variable length CHARACTER parameters, the PARM_DECL already
5983 references the length variable, so force gfc_get_symbol_decl
5984 even when not referenced. If optimize > 0, it will be optimized
5985 away anyway. But do this only after emitting -Wunused-parameter
5986 warning if requested. */
5987 if (sym->attr.dummy && !sym->attr.referenced
5988 && sym->ts.type == BT_CHARACTER
5989 && sym->ts.u.cl->backend_decl != NULL
5990 && VAR_P (sym->ts.u.cl->backend_decl))
5991 {
5992 sym->attr.referenced = 1;
5993 gfc_get_symbol_decl (sym);
5994 }
5995
5996 /* INTENT(out) dummy arguments and result variables with allocatable
5997 components are reset by default and need to be set referenced to
5998 generate the code for nullification and automatic lengths. */
5999 if (!sym->attr.referenced
6000 && sym->ts.type == BT_DERIVED
6001 && sym->ts.u.derived->attr.alloc_comp
6002 && !sym->attr.pointer
6003 && ((sym->attr.dummy && sym->attr.intent == INTENT_OUT)
6004 ||
6005 (sym->attr.result && sym != sym->result)))
6006 {
6007 sym->attr.referenced = 1;
6008 gfc_get_symbol_decl (sym);
6009 }
6010
6011 /* Check for dependencies in the array specification and string
6012 length, adding the necessary declarations to the function. We
6013 mark the symbol now, as well as in traverse_ns, to prevent
6014 getting stuck in a circular dependency. */
6015 sym->mark = 1;
6016 }
6017 else if (sym->attr.flavor == FL_PARAMETER)
6018 {
6019 if (warn_unused_parameter
6020 && !sym->attr.referenced)
6021 {
6022 if (!sym->attr.use_assoc)
6023 gfc_warning (OPT_Wunused_parameter,
6024 "Unused parameter %qs declared at %L", sym->name,
6025 &sym->declared_at);
6026 else if (sym->attr.use_only)
6027 gfc_warning (OPT_Wunused_parameter,
6028 "Unused parameter %qs which has been explicitly "
6029 "imported at %L", sym->name, &sym->declared_at);
6030 }
6031
6032 if (sym->ns && sym->ns->construct_entities)
6033 {
6034 /* Construction of the intrinsic modules within a BLOCK
6035 construct, where ONLY and RENAMED entities are included,
6036 seems to be bogus. This is a workaround that can be removed
6037 if someone ever takes on the task to creating full-fledge
6038 modules. See PR 69455. */
6039 if (sym->attr.referenced
6040 && sym->from_intmod != INTMOD_ISO_C_BINDING
6041 && sym->from_intmod != INTMOD_ISO_FORTRAN_ENV)
6042 gfc_get_symbol_decl (sym);
6043 sym->mark = 1;
6044 }
6045 }
6046 else if (sym->attr.flavor == FL_PROCEDURE)
6047 {
6048 /* TODO: move to the appropriate place in resolve.cc. */
6049 if (warn_return_type > 0
6050 && sym->attr.function
6051 && sym->result
6052 && sym != sym->result
6053 && !sym->result->attr.referenced
6054 && !sym->attr.use_assoc
6055 && sym->attr.if_source != IFSRC_IFBODY)
6056 {
6057 gfc_warning (OPT_Wreturn_type,
6058 "Return value %qs of function %qs declared at "
6059 "%L not set", sym->result->name, sym->name,
6060 &sym->result->declared_at);
6061
6062 /* Prevents "Unused variable" warning for RESULT variables. */
6063 sym->result->mark = 1;
6064 }
6065 }
6066
6067 if (sym->attr.dummy == 1)
6068 {
6069 /* The tree type for scalar character dummy arguments of BIND(C)
6070 procedures, if they are passed by value, should be unsigned char.
6071 The value attribute implies the dummy is a scalar. */
6072 if (sym->attr.value == 1 && sym->backend_decl != NULL
6073 && sym->ts.type == BT_CHARACTER && sym->ts.is_c_interop
6074 && sym->ns->proc_name != NULL && sym->ns->proc_name->attr.is_bind_c)
6075 {
6076 /* We used to modify the tree here. Now it is done earlier in
6077 the front-end, so we only check it here to avoid regressions. */
6078 gcc_assert (TREE_CODE (TREE_TYPE (sym->backend_decl)) == INTEGER_TYPE);
6079 gcc_assert (TYPE_UNSIGNED (TREE_TYPE (sym->backend_decl)) == 1);
6080 gcc_assert (TYPE_PRECISION (TREE_TYPE (sym->backend_decl)) == CHAR_TYPE_SIZE);
6081 gcc_assert (DECL_BY_REFERENCE (sym->backend_decl) == 0);
6082 }
6083
6084 /* Unused procedure passed as dummy argument. */
6085 if (sym->attr.flavor == FL_PROCEDURE)
6086 {
6087 if (!sym->attr.referenced && !sym->attr.artificial)
6088 {
6089 if (warn_unused_dummy_argument)
6090 gfc_warning (OPT_Wunused_dummy_argument,
6091 "Unused dummy argument %qs at %L", sym->name,
6092 &sym->declared_at);
6093 }
6094
6095 /* Silence bogus "unused parameter" warnings from the
6096 middle end. */
6097 if (sym->backend_decl != NULL_TREE)
6098 suppress_warning (sym->backend_decl);
6099 }
6100 }
6101
6102 /* Make sure we convert the types of the derived types from iso_c_binding
6103 into (void *). */
6104 if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c
6105 && sym->ts.type == BT_DERIVED)
6106 sym->backend_decl = gfc_typenode_for_spec (&(sym->ts));
6107 }
6108
6109
6110 static void
6111 generate_local_nml_decl (gfc_symbol * sym)
6112 {
6113 if (sym->attr.flavor == FL_NAMELIST && !sym->attr.use_assoc)
6114 {
6115 tree decl = generate_namelist_decl (sym);
6116 pushdecl (decl);
6117 }
6118 }
6119
6120
6121 static void
6122 generate_local_vars (gfc_namespace * ns)
6123 {
6124 gfc_traverse_ns (ns, generate_local_decl);
6125 gfc_traverse_ns (ns, generate_local_nml_decl);
6126 }
6127
6128
6129 /* Generate a switch statement to jump to the correct entry point. Also
6130 creates the label decls for the entry points. */
6131
6132 static tree
6133 gfc_trans_entry_master_switch (gfc_entry_list * el)
6134 {
6135 stmtblock_t block;
6136 tree label;
6137 tree tmp;
6138 tree val;
6139
6140 gfc_init_block (&block);
6141 for (; el; el = el->next)
6142 {
6143 /* Add the case label. */
6144 label = gfc_build_label_decl (NULL_TREE);
6145 val = build_int_cst (gfc_array_index_type, el->id);
6146 tmp = build_case_label (val, NULL_TREE, label);
6147 gfc_add_expr_to_block (&block, tmp);
6148
6149 /* And jump to the actual entry point. */
6150 label = gfc_build_label_decl (NULL_TREE);
6151 tmp = build1_v (GOTO_EXPR, label);
6152 gfc_add_expr_to_block (&block, tmp);
6153
6154 /* Save the label decl. */
6155 el->label = label;
6156 }
6157 tmp = gfc_finish_block (&block);
6158 /* The first argument selects the entry point. */
6159 val = DECL_ARGUMENTS (current_function_decl);
6160 tmp = fold_build2_loc (input_location, SWITCH_EXPR, NULL_TREE, val, tmp);
6161 return tmp;
6162 }
6163
6164
6165 /* Add code to string lengths of actual arguments passed to a function against
6166 the expected lengths of the dummy arguments. */
6167
6168 static void
6169 add_argument_checking (stmtblock_t *block, gfc_symbol *sym)
6170 {
6171 gfc_formal_arglist *formal;
6172
6173 for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next)
6174 if (formal->sym && formal->sym->ts.type == BT_CHARACTER
6175 && !formal->sym->ts.deferred)
6176 {
6177 enum tree_code comparison;
6178 tree cond;
6179 tree argname;
6180 gfc_symbol *fsym;
6181 gfc_charlen *cl;
6182 const char *message;
6183
6184 fsym = formal->sym;
6185 cl = fsym->ts.u.cl;
6186
6187 gcc_assert (cl);
6188 gcc_assert (cl->passed_length != NULL_TREE);
6189 gcc_assert (cl->backend_decl != NULL_TREE);
6190
6191 /* For POINTER, ALLOCATABLE and assumed-shape dummy arguments, the
6192 string lengths must match exactly. Otherwise, it is only required
6193 that the actual string length is *at least* the expected one.
6194 Sequence association allows for a mismatch of the string length
6195 if the actual argument is (part of) an array, but only if the
6196 dummy argument is an array. (See "Sequence association" in
6197 Section 12.4.1.4 for F95 and 12.4.1.5 for F2003.) */
6198 if (fsym->attr.pointer || fsym->attr.allocatable
6199 || (fsym->as && (fsym->as->type == AS_ASSUMED_SHAPE
6200 || fsym->as->type == AS_ASSUMED_RANK)))
6201 {
6202 comparison = NE_EXPR;
6203 message = _("Actual string length does not match the declared one"
6204 " for dummy argument '%s' (%ld/%ld)");
6205 }
6206 else if (fsym->as && fsym->as->rank != 0)
6207 continue;
6208 else
6209 {
6210 comparison = LT_EXPR;
6211 message = _("Actual string length is shorter than the declared one"
6212 " for dummy argument '%s' (%ld/%ld)");
6213 }
6214
6215 /* Build the condition. For optional arguments, an actual length
6216 of 0 is also acceptable if the associated string is NULL, which
6217 means the argument was not passed. */
6218 cond = fold_build2_loc (input_location, comparison, logical_type_node,
6219 cl->passed_length, cl->backend_decl);
6220 if (fsym->attr.optional)
6221 {
6222 tree not_absent;
6223 tree not_0length;
6224 tree absent_failed;
6225
6226 not_0length = fold_build2_loc (input_location, NE_EXPR,
6227 logical_type_node,
6228 cl->passed_length,
6229 build_zero_cst
6230 (TREE_TYPE (cl->passed_length)));
6231 /* The symbol needs to be referenced for gfc_get_symbol_decl. */
6232 fsym->attr.referenced = 1;
6233 not_absent = gfc_conv_expr_present (fsym);
6234
6235 absent_failed = fold_build2_loc (input_location, TRUTH_OR_EXPR,
6236 logical_type_node, not_0length,
6237 not_absent);
6238
6239 cond = fold_build2_loc (input_location, TRUTH_AND_EXPR,
6240 logical_type_node, cond, absent_failed);
6241 }
6242
6243 /* Build the runtime check. */
6244 argname = gfc_build_cstring_const (fsym->name);
6245 argname = gfc_build_addr_expr (pchar_type_node, argname);
6246 gfc_trans_runtime_check (true, false, cond, block, &fsym->declared_at,
6247 message, argname,
6248 fold_convert (long_integer_type_node,
6249 cl->passed_length),
6250 fold_convert (long_integer_type_node,
6251 cl->backend_decl));
6252 }
6253 }
6254
6255
6256 static void
6257 create_main_function (tree fndecl)
6258 {
6259 tree old_context;
6260 tree ftn_main;
6261 tree tmp, decl, result_decl, argc, argv, typelist, arglist;
6262 stmtblock_t body;
6263
6264 old_context = current_function_decl;
6265
6266 if (old_context)
6267 {
6268 push_function_context ();
6269 saved_parent_function_decls = saved_function_decls;
6270 saved_function_decls = NULL_TREE;
6271 }
6272
6273 /* main() function must be declared with global scope. */
6274 gcc_assert (current_function_decl == NULL_TREE);
6275
6276 /* Declare the function. */
6277 tmp = build_function_type_list (integer_type_node, integer_type_node,
6278 build_pointer_type (pchar_type_node),
6279 NULL_TREE);
6280 main_identifier_node = get_identifier ("main");
6281 ftn_main = build_decl (input_location, FUNCTION_DECL,
6282 main_identifier_node, tmp);
6283 DECL_EXTERNAL (ftn_main) = 0;
6284 TREE_PUBLIC (ftn_main) = 1;
6285 TREE_STATIC (ftn_main) = 1;
6286 DECL_ATTRIBUTES (ftn_main)
6287 = tree_cons (get_identifier("externally_visible"), NULL_TREE, NULL_TREE);
6288
6289 /* Setup the result declaration (for "return 0"). */
6290 result_decl = build_decl (input_location,
6291 RESULT_DECL, NULL_TREE, integer_type_node);
6292 DECL_ARTIFICIAL (result_decl) = 1;
6293 DECL_IGNORED_P (result_decl) = 1;
6294 DECL_CONTEXT (result_decl) = ftn_main;
6295 DECL_RESULT (ftn_main) = result_decl;
6296
6297 pushdecl (ftn_main);
6298
6299 /* Get the arguments. */
6300
6301 arglist = NULL_TREE;
6302 typelist = TYPE_ARG_TYPES (TREE_TYPE (ftn_main));
6303
6304 tmp = TREE_VALUE (typelist);
6305 argc = build_decl (input_location, PARM_DECL, get_identifier ("argc"), tmp);
6306 DECL_CONTEXT (argc) = ftn_main;
6307 DECL_ARG_TYPE (argc) = TREE_VALUE (typelist);
6308 TREE_READONLY (argc) = 1;
6309 gfc_finish_decl (argc);
6310 arglist = chainon (arglist, argc);
6311
6312 typelist = TREE_CHAIN (typelist);
6313 tmp = TREE_VALUE (typelist);
6314 argv = build_decl (input_location, PARM_DECL, get_identifier ("argv"), tmp);
6315 DECL_CONTEXT (argv) = ftn_main;
6316 DECL_ARG_TYPE (argv) = TREE_VALUE (typelist);
6317 TREE_READONLY (argv) = 1;
6318 DECL_BY_REFERENCE (argv) = 1;
6319 gfc_finish_decl (argv);
6320 arglist = chainon (arglist, argv);
6321
6322 DECL_ARGUMENTS (ftn_main) = arglist;
6323 current_function_decl = ftn_main;
6324 announce_function (ftn_main);
6325
6326 rest_of_decl_compilation (ftn_main, 1, 0);
6327 make_decl_rtl (ftn_main);
6328 allocate_struct_function (ftn_main, false);
6329 pushlevel ();
6330
6331 gfc_init_block (&body);
6332
6333 /* Call some libgfortran initialization routines, call then MAIN__(). */
6334
6335 /* Call _gfortran_caf_init (*argc, ***argv). */
6336 if (flag_coarray == GFC_FCOARRAY_LIB)
6337 {
6338 tree pint_type, pppchar_type;
6339 pint_type = build_pointer_type (integer_type_node);
6340 pppchar_type
6341 = build_pointer_type (build_pointer_type (pchar_type_node));
6342
6343 tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_init, 2,
6344 gfc_build_addr_expr (pint_type, argc),
6345 gfc_build_addr_expr (pppchar_type, argv));
6346 gfc_add_expr_to_block (&body, tmp);
6347 }
6348
6349 /* Call _gfortran_set_args (argc, argv). */
6350 TREE_USED (argc) = 1;
6351 TREE_USED (argv) = 1;
6352 tmp = build_call_expr_loc (input_location,
6353 gfor_fndecl_set_args, 2, argc, argv);
6354 gfc_add_expr_to_block (&body, tmp);
6355
6356 /* Add a call to set_options to set up the runtime library Fortran
6357 language standard parameters. */
6358 {
6359 tree array_type, array, var;
6360 vec<constructor_elt, va_gc> *v = NULL;
6361 static const int noptions = 7;
6362
6363 /* Passing a new option to the library requires three modifications:
6364 + add it to the tree_cons list below
6365 + change the noptions variable above
6366 + modify the library (runtime/compile_options.c)! */
6367
6368 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6369 build_int_cst (integer_type_node,
6370 gfc_option.warn_std));
6371 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6372 build_int_cst (integer_type_node,
6373 gfc_option.allow_std));
6374 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6375 build_int_cst (integer_type_node, pedantic));
6376 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6377 build_int_cst (integer_type_node, flag_backtrace));
6378 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6379 build_int_cst (integer_type_node, flag_sign_zero));
6380 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6381 build_int_cst (integer_type_node,
6382 (gfc_option.rtcheck
6383 & GFC_RTCHECK_BOUNDS)));
6384 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
6385 build_int_cst (integer_type_node,
6386 gfc_option.fpe_summary));
6387
6388 array_type = build_array_type_nelts (integer_type_node, noptions);
6389 array = build_constructor (array_type, v);
6390 TREE_CONSTANT (array) = 1;
6391 TREE_STATIC (array) = 1;
6392
6393 /* Create a static variable to hold the jump table. */
6394 var = build_decl (input_location, VAR_DECL,
6395 create_tmp_var_name ("options"), array_type);
6396 DECL_ARTIFICIAL (var) = 1;
6397 DECL_IGNORED_P (var) = 1;
6398 TREE_CONSTANT (var) = 1;
6399 TREE_STATIC (var) = 1;
6400 TREE_READONLY (var) = 1;
6401 DECL_INITIAL (var) = array;
6402 pushdecl (var);
6403 var = gfc_build_addr_expr (build_pointer_type (integer_type_node), var);
6404
6405 tmp = build_call_expr_loc (input_location,
6406 gfor_fndecl_set_options, 2,
6407 build_int_cst (integer_type_node, noptions), var);
6408 gfc_add_expr_to_block (&body, tmp);
6409 }
6410
6411 /* If -ffpe-trap option was provided, add a call to set_fpe so that
6412 the library will raise a FPE when needed. */
6413 if (gfc_option.fpe != 0)
6414 {
6415 tmp = build_call_expr_loc (input_location,
6416 gfor_fndecl_set_fpe, 1,
6417 build_int_cst (integer_type_node,
6418 gfc_option.fpe));
6419 gfc_add_expr_to_block (&body, tmp);
6420 }
6421
6422 /* If this is the main program and an -fconvert option was provided,
6423 add a call to set_convert. */
6424
6425 if (flag_convert != GFC_FLAG_CONVERT_NATIVE)
6426 {
6427 tmp = build_call_expr_loc (input_location,
6428 gfor_fndecl_set_convert, 1,
6429 build_int_cst (integer_type_node, flag_convert));
6430 gfc_add_expr_to_block (&body, tmp);
6431 }
6432
6433 /* If this is the main program and an -frecord-marker option was provided,
6434 add a call to set_record_marker. */
6435
6436 if (flag_record_marker != 0)
6437 {
6438 tmp = build_call_expr_loc (input_location,
6439 gfor_fndecl_set_record_marker, 1,
6440 build_int_cst (integer_type_node,
6441 flag_record_marker));
6442 gfc_add_expr_to_block (&body, tmp);
6443 }
6444
6445 if (flag_max_subrecord_length != 0)
6446 {
6447 tmp = build_call_expr_loc (input_location,
6448 gfor_fndecl_set_max_subrecord_length, 1,
6449 build_int_cst (integer_type_node,
6450 flag_max_subrecord_length));
6451 gfc_add_expr_to_block (&body, tmp);
6452 }
6453
6454 /* Call MAIN__(). */
6455 tmp = build_call_expr_loc (input_location,
6456 fndecl, 0);
6457 gfc_add_expr_to_block (&body, tmp);
6458
6459 /* Mark MAIN__ as used. */
6460 TREE_USED (fndecl) = 1;
6461
6462 /* Coarray: Call _gfortran_caf_finalize(void). */
6463 if (flag_coarray == GFC_FCOARRAY_LIB)
6464 {
6465 tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_finalize, 0);
6466 gfc_add_expr_to_block (&body, tmp);
6467 }
6468
6469 /* "return 0". */
6470 tmp = fold_build2_loc (input_location, MODIFY_EXPR, integer_type_node,
6471 DECL_RESULT (ftn_main),
6472 build_int_cst (integer_type_node, 0));
6473 tmp = build1_v (RETURN_EXPR, tmp);
6474 gfc_add_expr_to_block (&body, tmp);
6475
6476
6477 DECL_SAVED_TREE (ftn_main) = gfc_finish_block (&body);
6478 decl = getdecls ();
6479
6480 /* Finish off this function and send it for code generation. */
6481 poplevel (1, 1);
6482 BLOCK_SUPERCONTEXT (DECL_INITIAL (ftn_main)) = ftn_main;
6483
6484 DECL_SAVED_TREE (ftn_main)
6485 = fold_build3_loc (DECL_SOURCE_LOCATION (ftn_main), BIND_EXPR,
6486 void_type_node, decl, DECL_SAVED_TREE (ftn_main),
6487 DECL_INITIAL (ftn_main));
6488
6489 /* Output the GENERIC tree. */
6490 dump_function (TDI_original, ftn_main);
6491
6492 cgraph_node::finalize_function (ftn_main, true);
6493
6494 if (old_context)
6495 {
6496 pop_function_context ();
6497 saved_function_decls = saved_parent_function_decls;
6498 }
6499 current_function_decl = old_context;
6500 }
6501
6502
6503 /* Generate an appropriate return-statement for a procedure. */
6504
6505 tree
6506 gfc_generate_return (void)
6507 {
6508 gfc_symbol* sym;
6509 tree result;
6510 tree fndecl;
6511
6512 sym = current_procedure_symbol;
6513 fndecl = sym->backend_decl;
6514
6515 if (TREE_TYPE (DECL_RESULT (fndecl)) == void_type_node)
6516 result = NULL_TREE;
6517 else
6518 {
6519 result = get_proc_result (sym);
6520
6521 /* Set the return value to the dummy result variable. The
6522 types may be different for scalar default REAL functions
6523 with -ff2c, therefore we have to convert. */
6524 if (result != NULL_TREE)
6525 {
6526 result = convert (TREE_TYPE (DECL_RESULT (fndecl)), result);
6527 result = fold_build2_loc (input_location, MODIFY_EXPR,
6528 TREE_TYPE (result), DECL_RESULT (fndecl),
6529 result);
6530 }
6531 else
6532 {
6533 /* If the function does not have a result variable, result is
6534 NULL_TREE, and a 'return' is generated without a variable.
6535 The following generates a 'return __result_XXX' where XXX is
6536 the function name. */
6537 if (sym == sym->result && sym->attr.function && !flag_f2c)
6538 {
6539 result = gfc_get_fake_result_decl (sym, 0);
6540 result = fold_build2_loc (input_location, MODIFY_EXPR,
6541 TREE_TYPE (result),
6542 DECL_RESULT (fndecl), result);
6543 }
6544 }
6545 }
6546
6547 return build1_v (RETURN_EXPR, result);
6548 }
6549
6550
6551 static void
6552 is_from_ieee_module (gfc_symbol *sym)
6553 {
6554 if (sym->from_intmod == INTMOD_IEEE_FEATURES
6555 || sym->from_intmod == INTMOD_IEEE_EXCEPTIONS
6556 || sym->from_intmod == INTMOD_IEEE_ARITHMETIC)
6557 seen_ieee_symbol = 1;
6558 }
6559
6560
6561 static int
6562 is_ieee_module_used (gfc_namespace *ns)
6563 {
6564 seen_ieee_symbol = 0;
6565 gfc_traverse_ns (ns, is_from_ieee_module);
6566 return seen_ieee_symbol;
6567 }
6568
6569
6570 static gfc_omp_clauses *module_oacc_clauses;
6571
6572
6573 static void
6574 add_clause (gfc_symbol *sym, gfc_omp_map_op map_op)
6575 {
6576 gfc_omp_namelist *n;
6577
6578 n = gfc_get_omp_namelist ();
6579 n->sym = sym;
6580 n->u.map_op = map_op;
6581
6582 if (!module_oacc_clauses)
6583 module_oacc_clauses = gfc_get_omp_clauses ();
6584
6585 if (module_oacc_clauses->lists[OMP_LIST_MAP])
6586 n->next = module_oacc_clauses->lists[OMP_LIST_MAP];
6587
6588 module_oacc_clauses->lists[OMP_LIST_MAP] = n;
6589 }
6590
6591
6592 static void
6593 find_module_oacc_declare_clauses (gfc_symbol *sym)
6594 {
6595 if (sym->attr.use_assoc)
6596 {
6597 gfc_omp_map_op map_op;
6598
6599 if (sym->attr.oacc_declare_create)
6600 map_op = OMP_MAP_FORCE_ALLOC;
6601
6602 if (sym->attr.oacc_declare_copyin)
6603 map_op = OMP_MAP_FORCE_TO;
6604
6605 if (sym->attr.oacc_declare_deviceptr)
6606 map_op = OMP_MAP_FORCE_DEVICEPTR;
6607
6608 if (sym->attr.oacc_declare_device_resident)
6609 map_op = OMP_MAP_DEVICE_RESIDENT;
6610
6611 if (sym->attr.oacc_declare_create
6612 || sym->attr.oacc_declare_copyin
6613 || sym->attr.oacc_declare_deviceptr
6614 || sym->attr.oacc_declare_device_resident)
6615 {
6616 sym->attr.referenced = 1;
6617 add_clause (sym, map_op);
6618 }
6619 }
6620 }
6621
6622
6623 void
6624 finish_oacc_declare (gfc_namespace *ns, gfc_symbol *sym, bool block)
6625 {
6626 gfc_code *code;
6627 gfc_oacc_declare *oc;
6628 locus where = gfc_current_locus;
6629 gfc_omp_clauses *omp_clauses = NULL;
6630 gfc_omp_namelist *n, *p;
6631
6632 module_oacc_clauses = NULL;
6633 gfc_traverse_ns (ns, find_module_oacc_declare_clauses);
6634
6635 if (module_oacc_clauses && sym->attr.flavor == FL_PROGRAM)
6636 {
6637 gfc_oacc_declare *new_oc;
6638
6639 new_oc = gfc_get_oacc_declare ();
6640 new_oc->next = ns->oacc_declare;
6641 new_oc->clauses = module_oacc_clauses;
6642
6643 ns->oacc_declare = new_oc;
6644 }
6645
6646 if (!ns->oacc_declare)
6647 return;
6648
6649 for (oc = ns->oacc_declare; oc; oc = oc->next)
6650 {
6651 if (oc->module_var)
6652 continue;
6653
6654 if (block)
6655 gfc_error ("Sorry, !$ACC DECLARE at %L is not allowed "
6656 "in BLOCK construct", &oc->loc);
6657
6658
6659 if (oc->clauses && oc->clauses->lists[OMP_LIST_MAP])
6660 {
6661 if (omp_clauses == NULL)
6662 {
6663 omp_clauses = oc->clauses;
6664 continue;
6665 }
6666
6667 for (n = oc->clauses->lists[OMP_LIST_MAP]; n; p = n, n = n->next)
6668 ;
6669
6670 gcc_assert (p->next == NULL);
6671
6672 p->next = omp_clauses->lists[OMP_LIST_MAP];
6673 omp_clauses = oc->clauses;
6674 }
6675 }
6676
6677 if (!omp_clauses)
6678 return;
6679
6680 for (n = omp_clauses->lists[OMP_LIST_MAP]; n; n = n->next)
6681 {
6682 switch (n->u.map_op)
6683 {
6684 case OMP_MAP_DEVICE_RESIDENT:
6685 n->u.map_op = OMP_MAP_FORCE_ALLOC;
6686 break;
6687
6688 default:
6689 break;
6690 }
6691 }
6692
6693 code = XCNEW (gfc_code);
6694 code->op = EXEC_OACC_DECLARE;
6695 code->loc = where;
6696
6697 code->ext.oacc_declare = gfc_get_oacc_declare ();
6698 code->ext.oacc_declare->clauses = omp_clauses;
6699
6700 code->block = XCNEW (gfc_code);
6701 code->block->op = EXEC_OACC_DECLARE;
6702 code->block->loc = where;
6703
6704 if (ns->code)
6705 code->block->next = ns->code;
6706
6707 ns->code = code;
6708
6709 return;
6710 }
6711
6712 static void
6713 gfc_conv_cfi_to_gfc (stmtblock_t *init, stmtblock_t *finally,
6714 tree cfi_desc, tree gfc_desc, gfc_symbol *sym)
6715 {
6716 stmtblock_t block;
6717 gfc_init_block (&block);
6718 tree cfi = build_fold_indirect_ref_loc (input_location, cfi_desc);
6719 tree idx, etype, tmp, tmp2, size_var = NULL_TREE, rank = NULL_TREE;
6720 bool do_copy_inout = false;
6721
6722 /* When allocatable + intent out, free the cfi descriptor. */
6723 if (sym->attr.allocatable && sym->attr.intent == INTENT_OUT)
6724 {
6725 tmp = gfc_get_cfi_desc_base_addr (cfi);
6726 tree call = builtin_decl_explicit (BUILT_IN_FREE);
6727 call = build_call_expr_loc (input_location, call, 1, tmp);
6728 gfc_add_expr_to_block (&block, fold_convert (void_type_node, call));
6729 gfc_add_modify (&block, tmp,
6730 fold_convert (TREE_TYPE (tmp), null_pointer_node));
6731 }
6732
6733 /* -fcheck=bound: Do version, rank, attribute, type and is-NULL checks. */
6734 if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)
6735 {
6736 char *msg;
6737 tree tmp3;
6738 msg = xasprintf ("Unexpected version %%d (expected %d) in CFI descriptor "
6739 "passed to dummy argument %s", CFI_VERSION, sym->name);
6740 tmp2 = gfc_get_cfi_desc_version (cfi);
6741 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node, tmp2,
6742 build_int_cst (TREE_TYPE (tmp2), CFI_VERSION));
6743 gfc_trans_runtime_check (true, false, tmp, &block, &sym->declared_at,
6744 msg, tmp2);
6745 free (msg);
6746
6747 /* Rank check; however, for character(len=*), assumed/explicit-size arrays
6748 are permitted to differ in rank according to the Fortran rules. */
6749 if (sym->as && sym->as->type != AS_ASSUMED_SIZE
6750 && sym->as->type != AS_EXPLICIT)
6751 {
6752 if (sym->as->rank != -1)
6753 msg = xasprintf ("Invalid rank %%d (expected %d) in CFI descriptor "
6754 "passed to dummy argument %s", sym->as->rank,
6755 sym->name);
6756 else
6757 msg = xasprintf ("Invalid rank %%d (expected 0..%d) in CFI "
6758 "descriptor passed to dummy argument %s",
6759 CFI_MAX_RANK, sym->name);
6760
6761 tmp3 = tmp2 = tmp = gfc_get_cfi_desc_rank (cfi);
6762 if (sym->as->rank != -1)
6763 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
6764 tmp, build_int_cst (signed_char_type_node,
6765 sym->as->rank));
6766 else
6767 {
6768 tmp = fold_build2_loc (input_location, LT_EXPR, boolean_type_node,
6769 tmp, build_zero_cst (TREE_TYPE (tmp)));
6770 tmp2 = fold_build2_loc (input_location, GT_EXPR,
6771 boolean_type_node, tmp2,
6772 build_int_cst (TREE_TYPE (tmp2),
6773 CFI_MAX_RANK));
6774 tmp = fold_build2_loc (input_location, TRUTH_AND_EXPR,
6775 boolean_type_node, tmp, tmp2);
6776 }
6777 gfc_trans_runtime_check (true, false, tmp, &block, &sym->declared_at,
6778 msg, tmp3);
6779 free (msg);
6780 }
6781
6782 tmp3 = tmp = gfc_get_cfi_desc_attribute (cfi);
6783 if (sym->attr.allocatable || sym->attr.pointer)
6784 {
6785 int attr = (sym->attr.pointer ? CFI_attribute_pointer
6786 : CFI_attribute_allocatable);
6787 msg = xasprintf ("Invalid attribute %%d (expected %d) in CFI "
6788 "descriptor passed to dummy argument %s with %s "
6789 "attribute", attr, sym->name,
6790 sym->attr.pointer ? "pointer" : "allocatable");
6791 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
6792 tmp, build_int_cst (TREE_TYPE (tmp), attr));
6793 }
6794 else
6795 {
6796 int amin = MIN (CFI_attribute_pointer,
6797 MIN (CFI_attribute_allocatable, CFI_attribute_other));
6798 int amax = MAX (CFI_attribute_pointer,
6799 MAX (CFI_attribute_allocatable, CFI_attribute_other));
6800 msg = xasprintf ("Invalid attribute %%d (expected %d..%d) in CFI "
6801 "descriptor passed to nonallocatable, nonpointer "
6802 "dummy argument %s", amin, amax, sym->name);
6803 tmp2 = tmp;
6804 tmp = fold_build2_loc (input_location, LT_EXPR, boolean_type_node, tmp,
6805 build_int_cst (TREE_TYPE (tmp), amin));
6806 tmp2 = fold_build2_loc (input_location, GT_EXPR, boolean_type_node, tmp2,
6807 build_int_cst (TREE_TYPE (tmp2), amax));
6808 tmp = fold_build2_loc (input_location, TRUTH_AND_EXPR,
6809 boolean_type_node, tmp, tmp2);
6810 gfc_trans_runtime_check (true, false, tmp, &block, &sym->declared_at,
6811 msg, tmp3);
6812 free (msg);
6813 msg = xasprintf ("Invalid unallocatated/unassociated CFI "
6814 "descriptor passed to nonallocatable, nonpointer "
6815 "dummy argument %s", sym->name);
6816 tmp3 = tmp = gfc_get_cfi_desc_base_addr (cfi),
6817 tmp = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node,
6818 tmp, null_pointer_node);
6819 }
6820 gfc_trans_runtime_check (true, false, tmp, &block, &sym->declared_at,
6821 msg, tmp3);
6822 free (msg);
6823
6824 if (sym->ts.type != BT_ASSUMED)
6825 {
6826 int type = CFI_type_other;
6827 if (sym->ts.f90_type == BT_VOID)
6828 {
6829 type = (sym->ts.u.derived->intmod_sym_id == ISOCBINDING_FUNPTR
6830 ? CFI_type_cfunptr : CFI_type_cptr);
6831 }
6832 else
6833 switch (sym->ts.type)
6834 {
6835 case BT_INTEGER:
6836 case BT_LOGICAL:
6837 case BT_REAL:
6838 case BT_COMPLEX:
6839 type = CFI_type_from_type_kind (sym->ts.type, sym->ts.kind);
6840 break;
6841 case BT_CHARACTER:
6842 type = CFI_type_from_type_kind (CFI_type_Character,
6843 sym->ts.kind);
6844 break;
6845 case BT_DERIVED:
6846 type = CFI_type_struct;
6847 break;
6848 case BT_VOID:
6849 type = (sym->ts.u.derived->intmod_sym_id == ISOCBINDING_FUNPTR
6850 ? CFI_type_cfunptr : CFI_type_cptr);
6851 break;
6852 case BT_ASSUMED:
6853 case BT_CLASS:
6854 case BT_PROCEDURE:
6855 case BT_HOLLERITH:
6856 case BT_UNION:
6857 case BT_BOZ:
6858 case BT_UNKNOWN:
6859 gcc_unreachable ();
6860 }
6861 msg = xasprintf ("Unexpected type %%d (expected %d) in CFI descriptor"
6862 " passed to dummy argument %s", type, sym->name);
6863 tmp2 = tmp = gfc_get_cfi_desc_type (cfi);
6864 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
6865 tmp, build_int_cst (TREE_TYPE (tmp), type));
6866 gfc_trans_runtime_check (true, false, tmp, &block, &sym->declared_at,
6867 msg, tmp2);
6868 free (msg);
6869 }
6870 }
6871
6872 if (!sym->attr.referenced)
6873 goto done;
6874
6875 /* Set string length for len=* and len=:, otherwise, it is already set. */
6876 if (sym->ts.type == BT_CHARACTER && !sym->ts.u.cl->length)
6877 {
6878 tmp = fold_convert (gfc_array_index_type,
6879 gfc_get_cfi_desc_elem_len (cfi));
6880 if (sym->ts.kind != 1)
6881 tmp = fold_build2_loc (input_location, TRUNC_DIV_EXPR,
6882 gfc_array_index_type, tmp,
6883 build_int_cst (gfc_charlen_type_node,
6884 sym->ts.kind));
6885 gfc_add_modify (&block, sym->ts.u.cl->backend_decl, tmp);
6886 }
6887
6888 if (sym->ts.type == BT_CHARACTER
6889 && !INTEGER_CST_P (sym->ts.u.cl->backend_decl))
6890 {
6891 gfc_conv_string_length (sym->ts.u.cl, NULL, init);
6892 gfc_trans_vla_type_sizes (sym, init);
6893 }
6894
6895 /* gfc->data = cfi->base_addr - or for scalars: gfc = cfi->base_addr.
6896 assumed-size/explicit-size arrays end up here for character(len=*)
6897 only. */
6898 if (!sym->attr.dimension || !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
6899 {
6900 tmp = gfc_get_cfi_desc_base_addr (cfi);
6901 gfc_add_modify (&block, gfc_desc,
6902 fold_convert (TREE_TYPE (gfc_desc), tmp));
6903 if (!sym->attr.dimension)
6904 goto done;
6905 }
6906
6907 if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
6908 {
6909 /* gfc->dtype = ... (from declaration, not from cfi). */
6910 etype = gfc_get_element_type (TREE_TYPE (gfc_desc));
6911 gfc_add_modify (&block, gfc_conv_descriptor_dtype (gfc_desc),
6912 gfc_get_dtype_rank_type (sym->as->rank, etype));
6913 /* gfc->data = cfi->base_addr. */
6914 gfc_conv_descriptor_data_set (&block, gfc_desc,
6915 gfc_get_cfi_desc_base_addr (cfi));
6916 }
6917
6918 if (sym->ts.type == BT_ASSUMED)
6919 {
6920 /* For type(*), take elem_len + dtype.type from the actual argument. */
6921 gfc_add_modify (&block, gfc_conv_descriptor_elem_len (gfc_desc),
6922 gfc_get_cfi_desc_elem_len (cfi));
6923 tree cond;
6924 tree ctype = gfc_get_cfi_desc_type (cfi);
6925 ctype = fold_build2_loc (input_location, BIT_AND_EXPR, TREE_TYPE (ctype),
6926 ctype, build_int_cst (TREE_TYPE (ctype),
6927 CFI_type_mask));
6928 tree type = gfc_conv_descriptor_type (gfc_desc);
6929
6930 /* if (CFI_type_cptr) BT_VOID else BT_UNKNOWN */
6931 /* Note: BT_VOID is could also be CFI_type_funcptr, but assume c_ptr. */
6932 cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6933 build_int_cst (TREE_TYPE (ctype), CFI_type_cptr));
6934 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node, type,
6935 build_int_cst (TREE_TYPE (type), BT_VOID));
6936 tmp2 = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node,
6937 type,
6938 build_int_cst (TREE_TYPE (type), BT_UNKNOWN));
6939 tmp2 = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
6940 tmp, tmp2);
6941 /* if (CFI_type_struct) BT_DERIVED else < tmp2 > */
6942 cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6943 build_int_cst (TREE_TYPE (ctype),
6944 CFI_type_struct));
6945 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node, type,
6946 build_int_cst (TREE_TYPE (type), BT_DERIVED));
6947 tmp2 = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
6948 tmp, tmp2);
6949 /* if (CFI_type_Character) BT_CHARACTER else < tmp2 > */
6950 /* Note: this is kind=1, CFI_type_ucs4_char is handled in the 'else if'
6951 before (see below, as generated bottom up). */
6952 cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6953 build_int_cst (TREE_TYPE (ctype),
6954 CFI_type_Character));
6955 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node, type,
6956 build_int_cst (TREE_TYPE (type), BT_CHARACTER));
6957 tmp2 = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
6958 tmp, tmp2);
6959 /* if (CFI_type_ucs4_char) BT_CHARACTER else < tmp2 > */
6960 /* Note: gfc->elem_len = cfi->elem_len/4. */
6961 /* However, assuming that CFI_type_ucs4_char cannot be recovered, leave
6962 gfc->elem_len == cfi->elem_len, which helps with operations which use
6963 sizeof() in Fortran and cfi->elem_len in C. */
6964 tmp = gfc_get_cfi_desc_type (cfi);
6965 cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, tmp,
6966 build_int_cst (TREE_TYPE (tmp),
6967 CFI_type_ucs4_char));
6968 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node, type,
6969 build_int_cst (TREE_TYPE (type), BT_CHARACTER));
6970 tmp2 = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
6971 tmp, tmp2);
6972 /* if (CFI_type_Complex) BT_COMPLEX + cfi->elem_len/2 else < tmp2 > */
6973 cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6974 build_int_cst (TREE_TYPE (ctype),
6975 CFI_type_Complex));
6976 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node, type,
6977 build_int_cst (TREE_TYPE (type), BT_COMPLEX));
6978 tmp2 = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
6979 tmp, tmp2);
6980 /* if (CFI_type_Integer || CFI_type_Logical || CFI_type_Real)
6981 ctype else <tmp2> */
6982 cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6983 build_int_cst (TREE_TYPE (ctype),
6984 CFI_type_Integer));
6985 tmp = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6986 build_int_cst (TREE_TYPE (ctype),
6987 CFI_type_Logical));
6988 cond = fold_build2_loc (input_location, TRUTH_OR_EXPR, boolean_type_node,
6989 cond, tmp);
6990 tmp = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node, ctype,
6991 build_int_cst (TREE_TYPE (ctype),
6992 CFI_type_Real));
6993 cond = fold_build2_loc (input_location, TRUTH_OR_EXPR, boolean_type_node,
6994 cond, tmp);
6995 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node,
6996 type, fold_convert (TREE_TYPE (type), ctype));
6997 tmp2 = fold_build3_loc (input_location, COND_EXPR, void_type_node, cond,
6998 tmp, tmp2);
6999 gfc_add_expr_to_block (&block, tmp2);
7000 }
7001
7002 if (sym->as->rank < 0)
7003 {
7004 /* Set gfc->dtype.rank, if assumed-rank. */
7005 rank = gfc_get_cfi_desc_rank (cfi);
7006 gfc_add_modify (&block, gfc_conv_descriptor_rank (gfc_desc), rank);
7007 }
7008 else if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
7009 /* In that case, the CFI rank and the declared rank can differ. */
7010 rank = gfc_get_cfi_desc_rank (cfi);
7011 else
7012 rank = build_int_cst (signed_char_type_node, sym->as->rank);
7013
7014 /* With bind(C), the standard requires that both Fortran callers and callees
7015 handle noncontiguous arrays passed to an dummy with 'contiguous' attribute
7016 and with character(len=*) + assumed-size/explicit-size arrays.
7017 cf. Fortran 2018, 18.3.6, paragraph 5 (and for the caller: para. 6). */
7018 if ((sym->ts.type == BT_CHARACTER && !sym->ts.u.cl->length
7019 && (sym->as->type == AS_ASSUMED_SIZE || sym->as->type == AS_EXPLICIT))
7020 || sym->attr.contiguous)
7021 {
7022 do_copy_inout = true;
7023 gcc_assert (!sym->attr.pointer);
7024 stmtblock_t block2;
7025 tree data;
7026 if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
7027 data = gfc_conv_descriptor_data_get (gfc_desc);
7028 else if (!POINTER_TYPE_P (TREE_TYPE (gfc_desc)))
7029 data = gfc_build_addr_expr (NULL, gfc_desc);
7030 else
7031 data = gfc_desc;
7032
7033 /* Is copy-in/out needed? */
7034 /* do_copyin = rank != 0 && !assumed-size */
7035 tree cond_var = gfc_create_var (boolean_type_node, "do_copyin");
7036 tree cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7037 rank, build_zero_cst (TREE_TYPE (rank)));
7038 /* dim[rank-1].extent != -1 -> assumed size*/
7039 tmp = fold_build2_loc (input_location, MINUS_EXPR, TREE_TYPE (rank),
7040 rank, build_int_cst (TREE_TYPE (rank), 1));
7041 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7042 gfc_get_cfi_dim_extent (cfi, tmp),
7043 build_int_cst (gfc_array_index_type, -1));
7044 cond = fold_build2_loc (input_location, TRUTH_ANDIF_EXPR,
7045 boolean_type_node, cond, tmp);
7046 gfc_add_modify (&block, cond_var, cond);
7047 /* if (do_copyin) do_copyin = ... || ... || ... */
7048 gfc_init_block (&block2);
7049 /* dim[0].sm != elem_len */
7050 tmp = fold_convert (gfc_array_index_type,
7051 gfc_get_cfi_desc_elem_len (cfi));
7052 cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7053 gfc_get_cfi_dim_sm (cfi, gfc_index_zero_node),
7054 tmp);
7055 gfc_add_modify (&block2, cond_var, cond);
7056
7057 /* for (i = 1; i < rank; ++i)
7058 cond &&= dim[i].sm != (dv->dim[i - 1].sm * dv->dim[i - 1].extent) */
7059 idx = gfc_create_var (TREE_TYPE (rank), "idx");
7060 stmtblock_t loop_body;
7061 gfc_init_block (&loop_body);
7062 tmp = fold_build2_loc (input_location, MINUS_EXPR, TREE_TYPE (idx),
7063 idx, build_int_cst (TREE_TYPE (idx), 1));
7064 tree tmp2 = gfc_get_cfi_dim_sm (cfi, tmp);
7065 tmp = gfc_get_cfi_dim_extent (cfi, tmp);
7066 tmp = fold_build2_loc (input_location, MULT_EXPR, TREE_TYPE (tmp),
7067 tmp2, tmp);
7068 cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7069 gfc_get_cfi_dim_sm (cfi, idx), tmp);
7070 cond = fold_build2_loc (input_location, TRUTH_OR_EXPR, boolean_type_node,
7071 cond_var, cond);
7072 gfc_add_modify (&loop_body, cond_var, cond);
7073 gfc_simple_for_loop (&block2, idx, build_int_cst (TREE_TYPE (idx), 1),
7074 rank, LT_EXPR, build_int_cst (TREE_TYPE (idx), 1),
7075 gfc_finish_block (&loop_body));
7076 tmp = build3_v (COND_EXPR, cond_var, gfc_finish_block (&block2),
7077 build_empty_stmt (input_location));
7078 gfc_add_expr_to_block (&block, tmp);
7079
7080 /* Copy-in body. */
7081 gfc_init_block (&block2);
7082 /* size = dim[0].extent; for (i = 1; i < rank; ++i) size *= dim[i].extent */
7083 size_var = gfc_create_var (size_type_node, "size");
7084 tmp = fold_convert (size_type_node,
7085 gfc_get_cfi_dim_extent (cfi, gfc_index_zero_node));
7086 gfc_add_modify (&block2, size_var, tmp);
7087
7088 gfc_init_block (&loop_body);
7089 tmp = fold_convert (size_type_node,
7090 gfc_get_cfi_dim_extent (cfi, idx));
7091 tmp = fold_build2_loc (input_location, MULT_EXPR, size_type_node,
7092 size_var, fold_convert (size_type_node, tmp));
7093 gfc_add_modify (&loop_body, size_var, tmp);
7094 gfc_simple_for_loop (&block2, idx, build_int_cst (TREE_TYPE (idx), 1),
7095 rank, LT_EXPR, build_int_cst (TREE_TYPE (idx), 1),
7096 gfc_finish_block (&loop_body));
7097 /* data = malloc (size * elem_len) */
7098 tmp = fold_build2_loc (input_location, MULT_EXPR, size_type_node,
7099 size_var, gfc_get_cfi_desc_elem_len (cfi));
7100 tree call = builtin_decl_explicit (BUILT_IN_MALLOC);
7101 call = build_call_expr_loc (input_location, call, 1, tmp);
7102 gfc_add_modify (&block2, data, fold_convert (TREE_TYPE (data), call));
7103
7104 /* Copy the data:
7105 for (idx = 0; idx < size; ++idx)
7106 {
7107 shift = 0;
7108 tmpidx = idx
7109 for (dim = 0; dim < rank; ++dim)
7110 {
7111 shift += (tmpidx % extent[d]) * sm[d]
7112 tmpidx = tmpidx / extend[d]
7113 }
7114 memcpy (lhs + idx*elem_len, rhs + shift, elem_len)
7115 } .*/
7116 idx = gfc_create_var (size_type_node, "arrayidx");
7117 gfc_init_block (&loop_body);
7118 tree shift = gfc_create_var (size_type_node, "shift");
7119 tree tmpidx = gfc_create_var (size_type_node, "tmpidx");
7120 gfc_add_modify (&loop_body, shift, build_zero_cst (TREE_TYPE (shift)));
7121 gfc_add_modify (&loop_body, tmpidx, idx);
7122 stmtblock_t inner_loop;
7123 gfc_init_block (&inner_loop);
7124 tree dim = gfc_create_var (TREE_TYPE (rank), "dim");
7125 /* shift += (tmpidx % extent[d]) * sm[d] */
7126 tmp = fold_build2_loc (input_location, TRUNC_MOD_EXPR,
7127 size_type_node, tmpidx,
7128 fold_convert (size_type_node,
7129 gfc_get_cfi_dim_extent (cfi, dim)));
7130 tmp = fold_build2_loc (input_location, MULT_EXPR,
7131 size_type_node, tmp,
7132 fold_convert (size_type_node,
7133 gfc_get_cfi_dim_sm (cfi, dim)));
7134 gfc_add_modify (&inner_loop, shift,
7135 fold_build2_loc (input_location, PLUS_EXPR,
7136 size_type_node, shift, tmp));
7137 /* tmpidx = tmpidx / extend[d] */
7138 tmp = fold_convert (size_type_node, gfc_get_cfi_dim_extent (cfi, dim));
7139 gfc_add_modify (&inner_loop, tmpidx,
7140 fold_build2_loc (input_location, TRUNC_DIV_EXPR,
7141 size_type_node, tmpidx, tmp));
7142 gfc_simple_for_loop (&loop_body, dim, build_zero_cst (TREE_TYPE (rank)),
7143 rank, LT_EXPR, build_int_cst (TREE_TYPE (dim), 1),
7144 gfc_finish_block (&inner_loop));
7145 /* Assign. */
7146 tmp = fold_convert (pchar_type_node, gfc_get_cfi_desc_base_addr (cfi));
7147 tmp = fold_build2 (POINTER_PLUS_EXPR, pchar_type_node, tmp, shift);
7148 tree lhs;
7149 /* memcpy (lhs + idx*elem_len, rhs + shift, elem_len) */
7150 tree elem_len;
7151 if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
7152 elem_len = gfc_conv_descriptor_elem_len (gfc_desc);
7153 else
7154 elem_len = gfc_get_cfi_desc_elem_len (cfi);
7155 lhs = fold_build2_loc (input_location, MULT_EXPR, size_type_node,
7156 elem_len, idx);
7157 lhs = fold_build2_loc (input_location, POINTER_PLUS_EXPR, pchar_type_node,
7158 fold_convert (pchar_type_node, data), lhs);
7159 tmp = fold_convert (pvoid_type_node, tmp);
7160 lhs = fold_convert (pvoid_type_node, lhs);
7161 call = builtin_decl_explicit (BUILT_IN_MEMCPY);
7162 call = build_call_expr_loc (input_location, call, 3, lhs, tmp, elem_len);
7163 gfc_add_expr_to_block (&loop_body, fold_convert (void_type_node, call));
7164 gfc_simple_for_loop (&block2, idx, build_zero_cst (TREE_TYPE (idx)),
7165 size_var, LT_EXPR, build_int_cst (TREE_TYPE (idx), 1),
7166 gfc_finish_block (&loop_body));
7167 /* if (cond) { block2 } */
7168 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node,
7169 data, fold_convert (TREE_TYPE (data),
7170 null_pointer_node));
7171 tmp = build3_v (COND_EXPR, cond_var, gfc_finish_block (&block2),
7172 build_empty_stmt (input_location));
7173 gfc_add_expr_to_block (&block, tmp);
7174 }
7175
7176 if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
7177 {
7178 tree offset, type;
7179 type = TREE_TYPE (gfc_desc);
7180 gfc_trans_array_bounds (type, sym, &offset, &block);
7181 if (VAR_P (GFC_TYPE_ARRAY_OFFSET (type)))
7182 gfc_add_modify (&block, GFC_TYPE_ARRAY_OFFSET (type), offset);
7183 goto done;
7184 }
7185
7186 /* If cfi->data != NULL. */
7187 stmtblock_t block2;
7188 gfc_init_block (&block2);
7189
7190 /* if do_copy_inout: gfc->dspan = gfc->dtype.elem_len
7191 We use gfc instead of cfi on the RHS as this might be a constant. */
7192 tmp = fold_convert (gfc_array_index_type,
7193 gfc_conv_descriptor_elem_len (gfc_desc));
7194 if (!do_copy_inout)
7195 {
7196 /* gfc->dspan = ((cfi->dim[0].sm % gfc->elem_len)
7197 ? cfi->dim[0].sm : gfc->elem_len). */
7198 tree cond;
7199 tree tmp2 = gfc_get_cfi_dim_sm (cfi, gfc_rank_cst[0]);
7200 cond = fold_build2_loc (input_location, TRUNC_MOD_EXPR,
7201 gfc_array_index_type, tmp2, tmp);
7202 cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7203 cond, gfc_index_zero_node);
7204 tmp = build3_loc (input_location, COND_EXPR, gfc_array_index_type, cond,
7205 tmp2, tmp);
7206 }
7207 gfc_conv_descriptor_span_set (&block2, gfc_desc, tmp);
7208
7209 /* Calculate offset + set lbound, ubound and stride. */
7210 gfc_conv_descriptor_offset_set (&block2, gfc_desc, gfc_index_zero_node);
7211 if (sym->as->rank > 0 && !sym->attr.pointer && !sym->attr.allocatable)
7212 for (int i = 0; i < sym->as->rank; ++i)
7213 {
7214 gfc_se se;
7215 gfc_init_se (&se, NULL );
7216 if (sym->as->lower[i])
7217 {
7218 gfc_conv_expr (&se, sym->as->lower[i]);
7219 tmp = se.expr;
7220 }
7221 else
7222 tmp = gfc_index_one_node;
7223 gfc_add_block_to_block (&block2, &se.pre);
7224 gfc_conv_descriptor_lbound_set (&block2, gfc_desc, gfc_rank_cst[i],
7225 tmp);
7226 gfc_add_block_to_block (&block2, &se.post);
7227 }
7228
7229 /* Loop: for (i = 0; i < rank; ++i). */
7230 idx = gfc_create_var (TREE_TYPE (rank), "idx");
7231
7232 /* Loop body. */
7233 stmtblock_t loop_body;
7234 gfc_init_block (&loop_body);
7235 /* gfc->dim[i].lbound = ... */
7236 if (sym->attr.pointer || sym->attr.allocatable)
7237 {
7238 tmp = gfc_get_cfi_dim_lbound (cfi, idx);
7239 gfc_conv_descriptor_lbound_set (&loop_body, gfc_desc, idx, tmp);
7240 }
7241 else if (sym->as->rank < 0)
7242 gfc_conv_descriptor_lbound_set (&loop_body, gfc_desc, idx,
7243 gfc_index_one_node);
7244
7245 /* gfc->dim[i].ubound = gfc->dim[i].lbound + cfi->dim[i].extent - 1. */
7246 tmp = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
7247 gfc_conv_descriptor_lbound_get (gfc_desc, idx),
7248 gfc_index_one_node);
7249 tmp = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type,
7250 gfc_get_cfi_dim_extent (cfi, idx), tmp);
7251 gfc_conv_descriptor_ubound_set (&loop_body, gfc_desc, idx, tmp);
7252
7253 if (do_copy_inout)
7254 {
7255 /* gfc->dim[i].stride
7256 = idx == 0 ? 1 : gfc->dim[i-1].stride * cfi->dim[i-1].extent */
7257 tree cond = fold_build2_loc (input_location, EQ_EXPR, boolean_type_node,
7258 idx, build_zero_cst (TREE_TYPE (idx)));
7259 tmp = fold_build2_loc (input_location, MINUS_EXPR, TREE_TYPE (idx),
7260 idx, build_int_cst (TREE_TYPE (idx), 1));
7261 tree tmp2 = gfc_get_cfi_dim_extent (cfi, tmp);
7262 tmp = gfc_conv_descriptor_stride_get (gfc_desc, tmp);
7263 tmp = fold_build2_loc (input_location, MULT_EXPR, TREE_TYPE (tmp2),
7264 tmp2, tmp);
7265 tmp = build3_loc (input_location, COND_EXPR, gfc_array_index_type, cond,
7266 gfc_index_one_node, tmp);
7267 }
7268 else
7269 {
7270 /* gfc->dim[i].stride = cfi->dim[i].sm / cfi>elem_len */
7271 tmp = gfc_get_cfi_dim_sm (cfi, idx);
7272 tmp = fold_build2_loc (input_location, TRUNC_DIV_EXPR,
7273 gfc_array_index_type, tmp,
7274 fold_convert (gfc_array_index_type,
7275 gfc_get_cfi_desc_elem_len (cfi)));
7276 }
7277 gfc_conv_descriptor_stride_set (&loop_body, gfc_desc, idx, tmp);
7278 /* gfc->offset -= gfc->dim[i].stride * gfc->dim[i].lbound. */
7279 tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type,
7280 gfc_conv_descriptor_stride_get (gfc_desc, idx),
7281 gfc_conv_descriptor_lbound_get (gfc_desc, idx));
7282 tmp = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
7283 gfc_conv_descriptor_offset_get (gfc_desc), tmp);
7284 gfc_conv_descriptor_offset_set (&loop_body, gfc_desc, tmp);
7285
7286 /* Generate loop. */
7287 gfc_simple_for_loop (&block2, idx, build_zero_cst (TREE_TYPE (idx)),
7288 rank, LT_EXPR, build_int_cst (TREE_TYPE (idx), 1),
7289 gfc_finish_block (&loop_body));
7290 if (sym->attr.allocatable || sym->attr.pointer)
7291 {
7292 tmp = gfc_get_cfi_desc_base_addr (cfi),
7293 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7294 tmp, null_pointer_node);
7295 tmp = build3_v (COND_EXPR, tmp, gfc_finish_block (&block2),
7296 build_empty_stmt (input_location));
7297 gfc_add_expr_to_block (&block, tmp);
7298 }
7299 else
7300 gfc_add_block_to_block (&block, &block2);
7301
7302 done:
7303 /* If optional arg: 'if (arg) { block } else { local_arg = NULL; }'. */
7304 if (sym->attr.optional)
7305 {
7306 tree present = fold_build2_loc (input_location, NE_EXPR,
7307 boolean_type_node, cfi_desc,
7308 null_pointer_node);
7309 tmp = fold_build2_loc (input_location, MODIFY_EXPR, void_type_node,
7310 sym->backend_decl,
7311 fold_convert (TREE_TYPE (sym->backend_decl),
7312 null_pointer_node));
7313 tmp = build3_v (COND_EXPR, present, gfc_finish_block (&block), tmp);
7314 gfc_add_expr_to_block (init, tmp);
7315 }
7316 else
7317 gfc_add_block_to_block (init, &block);
7318
7319 if (!sym->attr.referenced)
7320 return;
7321
7322 /* If pointer not changed, nothing to be done (except copy out) */
7323 if (!do_copy_inout && ((!sym->attr.pointer && !sym->attr.allocatable)
7324 || sym->attr.intent == INTENT_IN))
7325 return;
7326
7327 gfc_init_block (&block);
7328
7329 /* For bind(C), Fortran does not permit mixing 'pointer' with 'contiguous' (or
7330 len=*). Thus, when copy out is needed, the bounds ofthe descriptor remain
7331 unchanged. */
7332 if (do_copy_inout)
7333 {
7334 tree data, call;
7335 if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
7336 data = gfc_conv_descriptor_data_get (gfc_desc);
7337 else if (!POINTER_TYPE_P (TREE_TYPE (gfc_desc)))
7338 data = gfc_build_addr_expr (NULL, gfc_desc);
7339 else
7340 data = gfc_desc;
7341 gfc_init_block (&block2);
7342 if (sym->attr.intent != INTENT_IN)
7343 {
7344 /* First, create the inner copy-out loop.
7345 for (idx = 0; idx < size; ++idx)
7346 {
7347 shift = 0;
7348 tmpidx = idx
7349 for (dim = 0; dim < rank; ++dim)
7350 {
7351 shift += (tmpidx % extent[d]) * sm[d]
7352 tmpidx = tmpidx / extend[d]
7353 }
7354 memcpy (lhs + shift, rhs + idx*elem_len, elem_len)
7355 } .*/
7356 stmtblock_t loop_body;
7357 idx = gfc_create_var (size_type_node, "arrayidx");
7358 gfc_init_block (&loop_body);
7359 tree shift = gfc_create_var (size_type_node, "shift");
7360 tree tmpidx = gfc_create_var (size_type_node, "tmpidx");
7361 gfc_add_modify (&loop_body, shift,
7362 build_zero_cst (TREE_TYPE (shift)));
7363 gfc_add_modify (&loop_body, tmpidx, idx);
7364 stmtblock_t inner_loop;
7365 gfc_init_block (&inner_loop);
7366 tree dim = gfc_create_var (TREE_TYPE (rank), "dim");
7367 /* shift += (tmpidx % extent[d]) * sm[d] */
7368 tmp = fold_convert (size_type_node,
7369 gfc_get_cfi_dim_extent (cfi, dim));
7370 tmp = fold_build2_loc (input_location, TRUNC_MOD_EXPR,
7371 size_type_node, tmpidx, tmp);
7372 tmp = fold_build2_loc (input_location, MULT_EXPR,
7373 size_type_node, tmp,
7374 fold_convert (size_type_node,
7375 gfc_get_cfi_dim_sm (cfi, dim)));
7376 gfc_add_modify (&inner_loop, shift,
7377 fold_build2_loc (input_location, PLUS_EXPR,
7378 size_type_node, shift, tmp));
7379 /* tmpidx = tmpidx / extend[d] */
7380 tmp = fold_convert (size_type_node,
7381 gfc_get_cfi_dim_extent (cfi, dim));
7382 gfc_add_modify (&inner_loop, tmpidx,
7383 fold_build2_loc (input_location, TRUNC_DIV_EXPR,
7384 size_type_node, tmpidx, tmp));
7385 gfc_simple_for_loop (&loop_body, dim,
7386 build_zero_cst (TREE_TYPE (rank)), rank, LT_EXPR,
7387 build_int_cst (TREE_TYPE (dim), 1),
7388 gfc_finish_block (&inner_loop));
7389 /* Assign. */
7390 tree rhs;
7391 tmp = fold_convert (pchar_type_node,
7392 gfc_get_cfi_desc_base_addr (cfi));
7393 tmp = fold_build2 (POINTER_PLUS_EXPR, pchar_type_node, tmp, shift);
7394 /* memcpy (lhs + shift, rhs + idx*elem_len, elem_len) */
7395 tree elem_len;
7396 if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (gfc_desc)))
7397 elem_len = gfc_conv_descriptor_elem_len (gfc_desc);
7398 else
7399 elem_len = gfc_get_cfi_desc_elem_len (cfi);
7400 rhs = fold_build2_loc (input_location, MULT_EXPR, size_type_node,
7401 elem_len, idx);
7402 rhs = fold_build2_loc (input_location, POINTER_PLUS_EXPR,
7403 pchar_type_node,
7404 fold_convert (pchar_type_node, data), rhs);
7405 tmp = fold_convert (pvoid_type_node, tmp);
7406 rhs = fold_convert (pvoid_type_node, rhs);
7407 call = builtin_decl_explicit (BUILT_IN_MEMCPY);
7408 call = build_call_expr_loc (input_location, call, 3, tmp, rhs,
7409 elem_len);
7410 gfc_add_expr_to_block (&loop_body,
7411 fold_convert (void_type_node, call));
7412 gfc_simple_for_loop (&block2, idx, build_zero_cst (TREE_TYPE (idx)),
7413 size_var, LT_EXPR,
7414 build_int_cst (TREE_TYPE (idx), 1),
7415 gfc_finish_block (&loop_body));
7416 }
7417 call = builtin_decl_explicit (BUILT_IN_FREE);
7418 call = build_call_expr_loc (input_location, call, 1, data);
7419 gfc_add_expr_to_block (&block2, call);
7420
7421 /* if (cfi->base_addr != gfc->data) { copy out; free(var) }; return */
7422 tree tmp2 = gfc_get_cfi_desc_base_addr (cfi);
7423 tmp2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7424 tmp2, fold_convert (TREE_TYPE (tmp2), data));
7425 tmp = build3_v (COND_EXPR, tmp2, gfc_finish_block (&block2),
7426 build_empty_stmt (input_location));
7427 gfc_add_expr_to_block (&block, tmp);
7428 goto done_finally;
7429 }
7430
7431 /* Update pointer + array data data on exit. */
7432 tmp = gfc_get_cfi_desc_base_addr (cfi);
7433 tmp2 = (!sym->attr.dimension
7434 ? gfc_desc : gfc_conv_descriptor_data_get (gfc_desc));
7435 gfc_add_modify (&block, tmp, fold_convert (TREE_TYPE (tmp), tmp2));
7436
7437 /* Set string length for len=:, only. */
7438 if (sym->ts.type == BT_CHARACTER && !sym->ts.u.cl->length)
7439 {
7440 tmp2 = gfc_get_cfi_desc_elem_len (cfi);
7441 tmp = fold_convert (TREE_TYPE (tmp2), sym->ts.u.cl->backend_decl);
7442 if (sym->ts.kind != 1)
7443 tmp = fold_build2_loc (input_location, MULT_EXPR,
7444 TREE_TYPE (tmp2), tmp,
7445 build_int_cst (TREE_TYPE (tmp2), sym->ts.kind));
7446 gfc_add_modify (&block, tmp2, tmp);
7447 }
7448
7449 if (!sym->attr.dimension)
7450 goto done_finally;
7451
7452 gfc_init_block (&block2);
7453
7454 /* Loop: for (i = 0; i < rank; ++i). */
7455 idx = gfc_create_var (TREE_TYPE (rank), "idx");
7456
7457 /* Loop body. */
7458 gfc_init_block (&loop_body);
7459 /* cfi->dim[i].lower_bound = gfc->dim[i].lbound */
7460 gfc_add_modify (&loop_body, gfc_get_cfi_dim_lbound (cfi, idx),
7461 gfc_conv_descriptor_lbound_get (gfc_desc, idx));
7462 /* cfi->dim[i].extent = gfc->dim[i].ubound - gfc->dim[i].lbound + 1. */
7463 tmp = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
7464 gfc_conv_descriptor_ubound_get (gfc_desc, idx),
7465 gfc_conv_descriptor_lbound_get (gfc_desc, idx));
7466 tmp = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type, tmp,
7467 gfc_index_one_node);
7468 gfc_add_modify (&loop_body, gfc_get_cfi_dim_extent (cfi, idx), tmp);
7469 /* d->dim[n].sm = gfc->dim[i].stride * gfc->span); */
7470 tmp = fold_build2_loc (input_location, MULT_EXPR, gfc_array_index_type,
7471 gfc_conv_descriptor_stride_get (gfc_desc, idx),
7472 gfc_conv_descriptor_span_get (gfc_desc));
7473 gfc_add_modify (&loop_body, gfc_get_cfi_dim_sm (cfi, idx), tmp);
7474
7475 /* Generate loop. */
7476 gfc_simple_for_loop (&block2, idx, build_zero_cst (TREE_TYPE (idx)),
7477 rank, LT_EXPR, build_int_cst (TREE_TYPE (idx), 1),
7478 gfc_finish_block (&loop_body));
7479 /* if (gfc->data != NULL) { block2 }. */
7480 tmp = gfc_get_cfi_desc_base_addr (cfi),
7481 tmp = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
7482 tmp, null_pointer_node);
7483 tmp = build3_v (COND_EXPR, tmp, gfc_finish_block (&block2),
7484 build_empty_stmt (input_location));
7485 gfc_add_expr_to_block (&block, tmp);
7486
7487 done_finally:
7488 /* If optional arg: 'if (arg) { block } else { local_arg = NULL; }'. */
7489 if (sym->attr.optional)
7490 {
7491 tree present = fold_build2_loc (input_location, NE_EXPR,
7492 boolean_type_node, cfi_desc,
7493 null_pointer_node);
7494 tmp = build3_v (COND_EXPR, present, gfc_finish_block (&block),
7495 build_empty_stmt (input_location));
7496 gfc_add_expr_to_block (finally, tmp);
7497 }
7498 else
7499 gfc_add_block_to_block (finally, &block);
7500 }
7501
7502 /* Generate code for a function. */
7503
7504 void
7505 gfc_generate_function_code (gfc_namespace * ns)
7506 {
7507 tree fndecl;
7508 tree old_context;
7509 tree decl;
7510 tree tmp;
7511 tree fpstate = NULL_TREE;
7512 stmtblock_t init, cleanup, outer_block;
7513 stmtblock_t body;
7514 gfc_wrapped_block try_block;
7515 tree recurcheckvar = NULL_TREE;
7516 gfc_symbol *sym;
7517 gfc_symbol *previous_procedure_symbol;
7518 int rank, ieee;
7519 bool is_recursive;
7520
7521 sym = ns->proc_name;
7522 previous_procedure_symbol = current_procedure_symbol;
7523 current_procedure_symbol = sym;
7524
7525 /* Initialize sym->tlink so that gfc_trans_deferred_vars does not get
7526 lost or worse. */
7527 sym->tlink = sym;
7528
7529 /* Create the declaration for functions with global scope. */
7530 if (!sym->backend_decl)
7531 gfc_create_function_decl (ns, false);
7532
7533 fndecl = sym->backend_decl;
7534 old_context = current_function_decl;
7535
7536 if (old_context)
7537 {
7538 push_function_context ();
7539 saved_parent_function_decls = saved_function_decls;
7540 saved_function_decls = NULL_TREE;
7541 }
7542
7543 trans_function_start (sym);
7544
7545 gfc_init_block (&init);
7546 gfc_init_block (&cleanup);
7547 gfc_init_block (&outer_block);
7548
7549 if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER)
7550 {
7551 /* Copy length backend_decls to all entry point result
7552 symbols. */
7553 gfc_entry_list *el;
7554 tree backend_decl;
7555
7556 gfc_conv_const_charlen (ns->proc_name->ts.u.cl);
7557 backend_decl = ns->proc_name->result->ts.u.cl->backend_decl;
7558 for (el = ns->entries; el; el = el->next)
7559 el->sym->result->ts.u.cl->backend_decl = backend_decl;
7560 }
7561
7562 /* Translate COMMON blocks. */
7563 gfc_trans_common (ns);
7564
7565 /* Null the parent fake result declaration if this namespace is
7566 a module function or an external procedures. */
7567 if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
7568 || ns->parent == NULL)
7569 parent_fake_result_decl = NULL_TREE;
7570
7571 /* For BIND(C):
7572 - deallocate intent-out allocatable dummy arguments.
7573 - Create GFC variable which will later be populated by convert_CFI_desc */
7574 if (sym->attr.is_bind_c)
7575 for (gfc_formal_arglist *formal = gfc_sym_get_dummy_args (sym);
7576 formal; formal = formal->next)
7577 {
7578 gfc_symbol *fsym = formal->sym;
7579 if (!is_CFI_desc (fsym, NULL))
7580 continue;
7581 if (!fsym->attr.referenced)
7582 {
7583 gfc_conv_cfi_to_gfc (&init, &cleanup, fsym->backend_decl,
7584 NULL_TREE, fsym);
7585 continue;
7586 }
7587 /* Let's now create a local GFI descriptor. Afterwards:
7588 desc is the local descriptor,
7589 desc_p is a pointer to it
7590 and stored in sym->backend_decl
7591 GFC_DECL_SAVED_DESCRIPTOR (desc_p) contains the CFI descriptor
7592 -> PARM_DECL and before sym->backend_decl.
7593 For scalars, decl == decl_p is a pointer variable. */
7594 tree desc_p, desc;
7595 location_t loc = gfc_get_location (&sym->declared_at);
7596 if (fsym->ts.type == BT_CHARACTER && !fsym->ts.u.cl->length)
7597 fsym->ts.u.cl->backend_decl = gfc_create_var (gfc_array_index_type,
7598 fsym->name);
7599 else if (fsym->ts.type == BT_CHARACTER && !fsym->ts.u.cl->backend_decl)
7600 {
7601 gfc_se se;
7602 gfc_init_se (&se, NULL );
7603 gfc_conv_expr (&se, fsym->ts.u.cl->length);
7604 gfc_add_block_to_block (&init, &se.pre);
7605 fsym->ts.u.cl->backend_decl = se.expr;
7606 gcc_assert(se.post.head == NULL_TREE);
7607 }
7608 /* Nullify, otherwise gfc_sym_type will return the CFI type. */
7609 tree tmp = fsym->backend_decl;
7610 fsym->backend_decl = NULL;
7611 tree type = gfc_sym_type (fsym);
7612 gcc_assert (POINTER_TYPE_P (type));
7613 if (POINTER_TYPE_P (TREE_TYPE (type)))
7614 /* For instance, allocatable scalars. */
7615 type = TREE_TYPE (type);
7616 if (TREE_CODE (type) == REFERENCE_TYPE)
7617 type = build_pointer_type (TREE_TYPE (type));
7618 desc_p = build_decl (loc, VAR_DECL, get_identifier (fsym->name), type);
7619 if (!fsym->attr.dimension)
7620 desc = desc_p;
7621 else if (!GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (desc_p))))
7622 {
7623 /* Character(len=*) explict-size/assumed-size array. */
7624 desc = desc_p;
7625 gfc_build_qualified_array (desc, fsym);
7626 }
7627 else
7628 {
7629 tree size = size_in_bytes (TREE_TYPE (TREE_TYPE (desc_p)));
7630 tree call = builtin_decl_explicit (BUILT_IN_ALLOCA);
7631 call = build_call_expr_loc (input_location, call, 1, size);
7632 gfc_add_modify (&outer_block, desc_p,
7633 fold_convert (TREE_TYPE(desc_p), call));
7634 desc = build_fold_indirect_ref_loc (input_location, desc_p);
7635 }
7636 pushdecl (desc_p);
7637 if (fsym->attr.optional)
7638 {
7639 gfc_allocate_lang_decl (desc_p);
7640 GFC_DECL_OPTIONAL_ARGUMENT (desc_p) = 1;
7641 }
7642 fsym->backend_decl = desc_p;
7643 gfc_conv_cfi_to_gfc (&init, &cleanup, tmp, desc, fsym);
7644 }
7645
7646 gfc_generate_contained_functions (ns);
7647
7648 has_coarray_vars = false;
7649 generate_local_vars (ns);
7650
7651 if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
7652 generate_coarray_init (ns);
7653
7654 /* Keep the parent fake result declaration in module functions
7655 or external procedures. */
7656 if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
7657 || ns->parent == NULL)
7658 current_fake_result_decl = parent_fake_result_decl;
7659 else
7660 current_fake_result_decl = NULL_TREE;
7661
7662 is_recursive = sym->attr.recursive
7663 || (sym->attr.entry_master
7664 && sym->ns->entries->sym->attr.recursive);
7665 if ((gfc_option.rtcheck & GFC_RTCHECK_RECURSION)
7666 && !is_recursive && !flag_recursive && !sym->attr.artificial)
7667 {
7668 char * msg;
7669
7670 msg = xasprintf ("Recursive call to nonrecursive procedure '%s'",
7671 sym->name);
7672 recurcheckvar = gfc_create_var (logical_type_node, "is_recursive");
7673 TREE_STATIC (recurcheckvar) = 1;
7674 DECL_INITIAL (recurcheckvar) = logical_false_node;
7675 gfc_add_expr_to_block (&init, recurcheckvar);
7676 gfc_trans_runtime_check (true, false, recurcheckvar, &init,
7677 &sym->declared_at, msg);
7678 gfc_add_modify (&init, recurcheckvar, logical_true_node);
7679 free (msg);
7680 }
7681
7682 /* Check if an IEEE module is used in the procedure. If so, save
7683 the floating point state. */
7684 ieee = is_ieee_module_used (ns);
7685 if (ieee)
7686 fpstate = gfc_save_fp_state (&init);
7687
7688 /* Now generate the code for the body of this function. */
7689 gfc_init_block (&body);
7690
7691 if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node
7692 && sym->attr.subroutine)
7693 {
7694 tree alternate_return;
7695 alternate_return = gfc_get_fake_result_decl (sym, 0);
7696 gfc_add_modify (&body, alternate_return, integer_zero_node);
7697 }
7698
7699 if (ns->entries)
7700 {
7701 /* Jump to the correct entry point. */
7702 tmp = gfc_trans_entry_master_switch (ns->entries);
7703 gfc_add_expr_to_block (&body, tmp);
7704 }
7705
7706 /* If bounds-checking is enabled, generate code to check passed in actual
7707 arguments against the expected dummy argument attributes (e.g. string
7708 lengths). */
7709 if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) && !sym->attr.is_bind_c)
7710 add_argument_checking (&body, sym);
7711
7712 finish_oacc_declare (ns, sym, false);
7713
7714 tmp = gfc_trans_code (ns->code);
7715 gfc_add_expr_to_block (&body, tmp);
7716
7717 if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node
7718 || (sym->result && sym->result != sym
7719 && sym->result->ts.type == BT_DERIVED
7720 && sym->result->ts.u.derived->attr.alloc_comp))
7721 {
7722 bool artificial_result_decl = false;
7723 tree result = get_proc_result (sym);
7724 gfc_symbol *rsym = sym == sym->result ? sym : sym->result;
7725
7726 /* Make sure that a function returning an object with
7727 alloc/pointer_components always has a result, where at least
7728 the allocatable/pointer components are set to zero. */
7729 if (result == NULL_TREE && sym->attr.function
7730 && ((sym->result->ts.type == BT_DERIVED
7731 && (sym->attr.allocatable
7732 || sym->attr.pointer
7733 || sym->result->ts.u.derived->attr.alloc_comp
7734 || sym->result->ts.u.derived->attr.pointer_comp))
7735 || (sym->result->ts.type == BT_CLASS
7736 && (CLASS_DATA (sym)->attr.allocatable
7737 || CLASS_DATA (sym)->attr.class_pointer
7738 || CLASS_DATA (sym->result)->attr.alloc_comp
7739 || CLASS_DATA (sym->result)->attr.pointer_comp))))
7740 {
7741 artificial_result_decl = true;
7742 result = gfc_get_fake_result_decl (sym, 0);
7743 }
7744
7745 if (result != NULL_TREE && sym->attr.function && !sym->attr.pointer)
7746 {
7747 if (sym->attr.allocatable && sym->attr.dimension == 0
7748 && sym->result == sym)
7749 gfc_add_modify (&init, result, fold_convert (TREE_TYPE (result),
7750 null_pointer_node));
7751 else if (sym->ts.type == BT_CLASS
7752 && CLASS_DATA (sym)->attr.allocatable
7753 && CLASS_DATA (sym)->attr.dimension == 0
7754 && sym->result == sym)
7755 {
7756 tmp = CLASS_DATA (sym)->backend_decl;
7757 tmp = fold_build3_loc (input_location, COMPONENT_REF,
7758 TREE_TYPE (tmp), result, tmp, NULL_TREE);
7759 gfc_add_modify (&init, tmp, fold_convert (TREE_TYPE (tmp),
7760 null_pointer_node));
7761 }
7762 else if (sym->ts.type == BT_DERIVED
7763 && !sym->attr.allocatable)
7764 {
7765 gfc_expr *init_exp;
7766 /* Arrays are not initialized using the default initializer of
7767 their elements. Therefore only check if a default
7768 initializer is available when the result is scalar. */
7769 init_exp = rsym->as ? NULL
7770 : gfc_generate_initializer (&rsym->ts, true);
7771 if (init_exp)
7772 {
7773 tmp = gfc_trans_structure_assign (result, init_exp, 0);
7774 gfc_free_expr (init_exp);
7775 gfc_add_expr_to_block (&init, tmp);
7776 }
7777 else if (rsym->ts.u.derived->attr.alloc_comp)
7778 {
7779 rank = rsym->as ? rsym->as->rank : 0;
7780 tmp = gfc_nullify_alloc_comp (rsym->ts.u.derived, result,
7781 rank);
7782 gfc_prepend_expr_to_block (&body, tmp);
7783 }
7784 }
7785 }
7786
7787 if (result == NULL_TREE || artificial_result_decl)
7788 {
7789 /* TODO: move to the appropriate place in resolve.cc. */
7790 if (warn_return_type > 0 && sym == sym->result)
7791 gfc_warning (OPT_Wreturn_type,
7792 "Return value of function %qs at %L not set",
7793 sym->name, &sym->declared_at);
7794 if (warn_return_type > 0)
7795 suppress_warning (sym->backend_decl);
7796 }
7797 if (result != NULL_TREE)
7798 gfc_add_expr_to_block (&body, gfc_generate_return ());
7799 }
7800
7801 /* Reset recursion-check variable. */
7802 if (recurcheckvar != NULL_TREE)
7803 {
7804 gfc_add_modify (&cleanup, recurcheckvar, logical_false_node);
7805 recurcheckvar = NULL;
7806 }
7807
7808 /* If IEEE modules are loaded, restore the floating-point state. */
7809 if (ieee)
7810 gfc_restore_fp_state (&cleanup, fpstate);
7811
7812 /* Finish the function body and add init and cleanup code. */
7813 tmp = gfc_finish_block (&body);
7814 /* Add code to create and cleanup arrays. */
7815 gfc_start_wrapped_block (&try_block, tmp);
7816 gfc_trans_deferred_vars (sym, &try_block);
7817 gfc_add_init_cleanup (&try_block, gfc_finish_block (&init),
7818 gfc_finish_block (&cleanup));
7819
7820 /* Add all the decls we created during processing. */
7821 decl = nreverse (saved_function_decls);
7822 while (decl)
7823 {
7824 tree next;
7825
7826 next = DECL_CHAIN (decl);
7827 DECL_CHAIN (decl) = NULL_TREE;
7828 pushdecl (decl);
7829 decl = next;
7830 }
7831 saved_function_decls = NULL_TREE;
7832
7833 gfc_add_expr_to_block (&outer_block, gfc_finish_wrapped_block (&try_block));
7834 DECL_SAVED_TREE (fndecl) = gfc_finish_block (&outer_block);
7835 decl = getdecls ();
7836
7837 /* Finish off this function and send it for code generation. */
7838 poplevel (1, 1);
7839 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
7840
7841 DECL_SAVED_TREE (fndecl)
7842 = fold_build3_loc (DECL_SOURCE_LOCATION (fndecl), BIND_EXPR, void_type_node,
7843 decl, DECL_SAVED_TREE (fndecl), DECL_INITIAL (fndecl));
7844
7845 /* Output the GENERIC tree. */
7846 dump_function (TDI_original, fndecl);
7847
7848 /* Store the end of the function, so that we get good line number
7849 info for the epilogue. */
7850 cfun->function_end_locus = input_location;
7851
7852 /* We're leaving the context of this function, so zap cfun.
7853 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
7854 tree_rest_of_compilation. */
7855 set_cfun (NULL);
7856
7857 if (old_context)
7858 {
7859 pop_function_context ();
7860 saved_function_decls = saved_parent_function_decls;
7861 }
7862 current_function_decl = old_context;
7863
7864 if (decl_function_context (fndecl))
7865 {
7866 /* Register this function with cgraph just far enough to get it
7867 added to our parent's nested function list.
7868 If there are static coarrays in this function, the nested _caf_init
7869 function has already called cgraph_create_node, which also created
7870 the cgraph node for this function. */
7871 if (!has_coarray_vars || flag_coarray != GFC_FCOARRAY_LIB)
7872 (void) cgraph_node::get_create (fndecl);
7873 }
7874 else
7875 cgraph_node::finalize_function (fndecl, true);
7876
7877 gfc_trans_use_stmts (ns);
7878 gfc_traverse_ns (ns, gfc_emit_parameter_debug_info);
7879
7880 if (sym->attr.is_main_program)
7881 create_main_function (fndecl);
7882
7883 current_procedure_symbol = previous_procedure_symbol;
7884 }
7885
7886
7887 void
7888 gfc_generate_constructors (void)
7889 {
7890 gcc_assert (gfc_static_ctors == NULL_TREE);
7891 #if 0
7892 tree fnname;
7893 tree type;
7894 tree fndecl;
7895 tree decl;
7896 tree tmp;
7897
7898 if (gfc_static_ctors == NULL_TREE)
7899 return;
7900
7901 fnname = get_file_function_name ("I");
7902 type = build_function_type_list (void_type_node, NULL_TREE);
7903
7904 fndecl = build_decl (input_location,
7905 FUNCTION_DECL, fnname, type);
7906 TREE_PUBLIC (fndecl) = 1;
7907
7908 decl = build_decl (input_location,
7909 RESULT_DECL, NULL_TREE, void_type_node);
7910 DECL_ARTIFICIAL (decl) = 1;
7911 DECL_IGNORED_P (decl) = 1;
7912 DECL_CONTEXT (decl) = fndecl;
7913 DECL_RESULT (fndecl) = decl;
7914
7915 pushdecl (fndecl);
7916
7917 current_function_decl = fndecl;
7918
7919 rest_of_decl_compilation (fndecl, 1, 0);
7920
7921 make_decl_rtl (fndecl);
7922
7923 allocate_struct_function (fndecl, false);
7924
7925 pushlevel ();
7926
7927 for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors))
7928 {
7929 tmp = build_call_expr_loc (input_location,
7930 TREE_VALUE (gfc_static_ctors), 0);
7931 DECL_SAVED_TREE (fndecl) = build_stmt (input_location, EXPR_STMT, tmp);
7932 }
7933
7934 decl = getdecls ();
7935 poplevel (1, 1);
7936
7937 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
7938 DECL_SAVED_TREE (fndecl)
7939 = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl),
7940 DECL_INITIAL (fndecl));
7941
7942 free_after_parsing (cfun);
7943 free_after_compilation (cfun);
7944
7945 tree_rest_of_compilation (fndecl);
7946
7947 current_function_decl = NULL_TREE;
7948 #endif
7949 }
7950
7951 /* Translates a BLOCK DATA program unit. This means emitting the
7952 commons contained therein plus their initializations. We also emit
7953 a globally visible symbol to make sure that each BLOCK DATA program
7954 unit remains unique. */
7955
7956 void
7957 gfc_generate_block_data (gfc_namespace * ns)
7958 {
7959 tree decl;
7960 tree id;
7961
7962 /* Tell the backend the source location of the block data. */
7963 if (ns->proc_name)
7964 gfc_set_backend_locus (&ns->proc_name->declared_at);
7965 else
7966 gfc_set_backend_locus (&gfc_current_locus);
7967
7968 /* Process the DATA statements. */
7969 gfc_trans_common (ns);
7970
7971 /* Create a global symbol with the mane of the block data. This is to
7972 generate linker errors if the same name is used twice. It is never
7973 really used. */
7974 if (ns->proc_name)
7975 id = gfc_sym_mangled_function_id (ns->proc_name);
7976 else
7977 id = get_identifier ("__BLOCK_DATA__");
7978
7979 decl = build_decl (input_location,
7980 VAR_DECL, id, gfc_array_index_type);
7981 TREE_PUBLIC (decl) = 1;
7982 TREE_STATIC (decl) = 1;
7983 DECL_IGNORED_P (decl) = 1;
7984
7985 pushdecl (decl);
7986 rest_of_decl_compilation (decl, 1, 0);
7987 }
7988
7989
7990 /* Process the local variables of a BLOCK construct. */
7991
7992 void
7993 gfc_process_block_locals (gfc_namespace* ns)
7994 {
7995 tree decl;
7996
7997 saved_local_decls = NULL_TREE;
7998 has_coarray_vars = false;
7999
8000 generate_local_vars (ns);
8001
8002 if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
8003 generate_coarray_init (ns);
8004
8005 decl = nreverse (saved_local_decls);
8006 while (decl)
8007 {
8008 tree next;
8009
8010 next = DECL_CHAIN (decl);
8011 DECL_CHAIN (decl) = NULL_TREE;
8012 pushdecl (decl);
8013 decl = next;
8014 }
8015 saved_local_decls = NULL_TREE;
8016 }
8017
8018
8019 #include "gt-fortran-trans-decl.h"
GNU Compiler Collection
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