]>
Commit | Line | Data |
---|---|---|
4ee9c684 | 1 | /* Backend function setup |
7b3423b9 | 2 | Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
4ee9c684 | 3 | Contributed by Paul Brook |
4 | ||
c84b470d | 5 | This file is part of GCC. |
4ee9c684 | 6 | |
c84b470d | 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 2, or (at your option) any later | |
10 | version. | |
4ee9c684 | 11 | |
c84b470d | 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. | |
4ee9c684 | 16 | |
17 | You should have received a copy of the GNU General Public License | |
c84b470d | 18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
4ee9c684 | 21 | |
22 | /* trans-decl.c -- Handling of backend function and variable decls, etc */ | |
23 | ||
24 | #include "config.h" | |
25 | #include "system.h" | |
26 | #include "coretypes.h" | |
27 | #include "tree.h" | |
28 | #include "tree-dump.h" | |
88bce636 | 29 | #include "tree-gimple.h" |
4ee9c684 | 30 | #include "ggc.h" |
31 | #include "toplev.h" | |
32 | #include "tm.h" | |
33 | #include "target.h" | |
34 | #include "function.h" | |
35 | #include "errors.h" | |
36 | #include "flags.h" | |
37 | #include "cgraph.h" | |
4ee9c684 | 38 | #include "gfortran.h" |
39 | #include "trans.h" | |
40 | #include "trans-types.h" | |
41 | #include "trans-array.h" | |
42 | #include "trans-const.h" | |
43 | /* Only for gfc_trans_code. Shouldn't need to include this. */ | |
44 | #include "trans-stmt.h" | |
45 | ||
46 | #define MAX_LABEL_VALUE 99999 | |
47 | ||
48 | ||
49 | /* Holds the result of the function if no result variable specified. */ | |
50 | ||
51 | static GTY(()) tree current_fake_result_decl; | |
52 | ||
53 | static GTY(()) tree current_function_return_label; | |
54 | ||
55 | ||
56 | /* Holds the variable DECLs for the current function. */ | |
57 | ||
58 | static GTY(()) tree saved_function_decls = NULL_TREE; | |
59 | static GTY(()) tree saved_parent_function_decls = NULL_TREE; | |
60 | ||
61 | ||
62 | /* The namespace of the module we're currently generating. Only used while | |
63 | outputting decls for module variables. Do not rely on this being set. */ | |
64 | ||
65 | static gfc_namespace *module_namespace; | |
66 | ||
67 | ||
68 | /* List of static constructor functions. */ | |
69 | ||
70 | tree gfc_static_ctors; | |
71 | ||
72 | ||
73 | /* Function declarations for builtin library functions. */ | |
74 | ||
75 | tree gfor_fndecl_internal_malloc; | |
76 | tree gfor_fndecl_internal_malloc64; | |
77 | tree gfor_fndecl_internal_free; | |
78 | tree gfor_fndecl_allocate; | |
79 | tree gfor_fndecl_allocate64; | |
80 | tree gfor_fndecl_deallocate; | |
81 | tree gfor_fndecl_pause_numeric; | |
82 | tree gfor_fndecl_pause_string; | |
83 | tree gfor_fndecl_stop_numeric; | |
84 | tree gfor_fndecl_stop_string; | |
85 | tree gfor_fndecl_select_string; | |
86 | tree gfor_fndecl_runtime_error; | |
87 | tree gfor_fndecl_in_pack; | |
88 | tree gfor_fndecl_in_unpack; | |
89 | tree gfor_fndecl_associated; | |
90 | ||
91 | ||
92 | /* Math functions. Many other math functions are handled in | |
93 | trans-intrinsic.c. */ | |
94 | ||
76834664 | 95 | gfc_powdecl_list gfor_fndecl_math_powi[3][2]; |
4ee9c684 | 96 | tree gfor_fndecl_math_cpowf; |
97 | tree gfor_fndecl_math_cpow; | |
4ee9c684 | 98 | tree gfor_fndecl_math_ishftc4; |
99 | tree gfor_fndecl_math_ishftc8; | |
100 | tree gfor_fndecl_math_exponent4; | |
101 | tree gfor_fndecl_math_exponent8; | |
102 | ||
103 | ||
104 | /* String functions. */ | |
105 | ||
106 | tree gfor_fndecl_copy_string; | |
107 | tree gfor_fndecl_compare_string; | |
108 | tree gfor_fndecl_concat_string; | |
109 | tree gfor_fndecl_string_len_trim; | |
110 | tree gfor_fndecl_string_index; | |
111 | tree gfor_fndecl_string_scan; | |
112 | tree gfor_fndecl_string_verify; | |
113 | tree gfor_fndecl_string_trim; | |
114 | tree gfor_fndecl_string_repeat; | |
115 | tree gfor_fndecl_adjustl; | |
116 | tree gfor_fndecl_adjustr; | |
117 | ||
118 | ||
119 | /* Other misc. runtime library functions. */ | |
120 | ||
121 | tree gfor_fndecl_size0; | |
122 | tree gfor_fndecl_size1; | |
9b057c29 | 123 | tree gfor_fndecl_iargc; |
4ee9c684 | 124 | |
125 | /* Intrinsic functions implemented in FORTRAN. */ | |
126 | tree gfor_fndecl_si_kind; | |
127 | tree gfor_fndecl_sr_kind; | |
128 | ||
129 | ||
130 | static void | |
131 | gfc_add_decl_to_parent_function (tree decl) | |
132 | { | |
22d678e8 | 133 | gcc_assert (decl); |
4ee9c684 | 134 | DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl); |
135 | DECL_NONLOCAL (decl) = 1; | |
136 | TREE_CHAIN (decl) = saved_parent_function_decls; | |
137 | saved_parent_function_decls = decl; | |
138 | } | |
139 | ||
140 | void | |
141 | gfc_add_decl_to_function (tree decl) | |
142 | { | |
22d678e8 | 143 | gcc_assert (decl); |
4ee9c684 | 144 | TREE_USED (decl) = 1; |
145 | DECL_CONTEXT (decl) = current_function_decl; | |
146 | TREE_CHAIN (decl) = saved_function_decls; | |
147 | saved_function_decls = decl; | |
148 | } | |
149 | ||
150 | ||
b797d6d3 | 151 | /* Build a backend label declaration. Set TREE_USED for named labels. |
152 | The context of the label is always the current_function_decl. All | |
153 | labels are marked artificial. */ | |
4ee9c684 | 154 | |
155 | tree | |
156 | gfc_build_label_decl (tree label_id) | |
157 | { | |
158 | /* 2^32 temporaries should be enough. */ | |
159 | static unsigned int tmp_num = 1; | |
160 | tree label_decl; | |
161 | char *label_name; | |
162 | ||
163 | if (label_id == NULL_TREE) | |
164 | { | |
165 | /* Build an internal label name. */ | |
166 | ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++); | |
167 | label_id = get_identifier (label_name); | |
168 | } | |
169 | else | |
170 | label_name = NULL; | |
171 | ||
172 | /* Build the LABEL_DECL node. Labels have no type. */ | |
173 | label_decl = build_decl (LABEL_DECL, label_id, void_type_node); | |
174 | DECL_CONTEXT (label_decl) = current_function_decl; | |
175 | DECL_MODE (label_decl) = VOIDmode; | |
176 | ||
b797d6d3 | 177 | /* We always define the label as used, even if the original source |
178 | file never references the label. We don't want all kinds of | |
179 | spurious warnings for old-style Fortran code with too many | |
180 | labels. */ | |
181 | TREE_USED (label_decl) = 1; | |
4ee9c684 | 182 | |
b797d6d3 | 183 | DECL_ARTIFICIAL (label_decl) = 1; |
4ee9c684 | 184 | return label_decl; |
185 | } | |
186 | ||
187 | ||
188 | /* Returns the return label for the current function. */ | |
189 | ||
190 | tree | |
191 | gfc_get_return_label (void) | |
192 | { | |
193 | char name[GFC_MAX_SYMBOL_LEN + 10]; | |
194 | ||
195 | if (current_function_return_label) | |
196 | return current_function_return_label; | |
197 | ||
198 | sprintf (name, "__return_%s", | |
199 | IDENTIFIER_POINTER (DECL_NAME (current_function_decl))); | |
200 | ||
201 | current_function_return_label = | |
202 | gfc_build_label_decl (get_identifier (name)); | |
203 | ||
204 | DECL_ARTIFICIAL (current_function_return_label) = 1; | |
205 | ||
206 | return current_function_return_label; | |
207 | } | |
208 | ||
209 | ||
b31f705b | 210 | /* Set the backend source location of a decl. */ |
211 | ||
212 | void | |
213 | gfc_set_decl_location (tree decl, locus * loc) | |
214 | { | |
215 | #ifdef USE_MAPPED_LOCATION | |
216 | DECL_SOURCE_LOCATION (decl) = loc->lb->location; | |
217 | #else | |
218 | DECL_SOURCE_LINE (decl) = loc->lb->linenum; | |
219 | DECL_SOURCE_FILE (decl) = loc->lb->file->filename; | |
220 | #endif | |
221 | } | |
222 | ||
223 | ||
4ee9c684 | 224 | /* Return the backend label declaration for a given label structure, |
225 | or create it if it doesn't exist yet. */ | |
226 | ||
227 | tree | |
228 | gfc_get_label_decl (gfc_st_label * lp) | |
229 | { | |
4ee9c684 | 230 | if (lp->backend_decl) |
231 | return lp->backend_decl; | |
232 | else | |
233 | { | |
234 | char label_name[GFC_MAX_SYMBOL_LEN + 1]; | |
235 | tree label_decl; | |
236 | ||
237 | /* Validate the label declaration from the front end. */ | |
22d678e8 | 238 | gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE); |
4ee9c684 | 239 | |
240 | /* Build a mangled name for the label. */ | |
241 | sprintf (label_name, "__label_%.6d", lp->value); | |
242 | ||
243 | /* Build the LABEL_DECL node. */ | |
244 | label_decl = gfc_build_label_decl (get_identifier (label_name)); | |
245 | ||
246 | /* Tell the debugger where the label came from. */ | |
f888a3fb | 247 | if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */ |
b31f705b | 248 | gfc_set_decl_location (label_decl, &lp->where); |
4ee9c684 | 249 | else |
250 | DECL_ARTIFICIAL (label_decl) = 1; | |
251 | ||
252 | /* Store the label in the label list and return the LABEL_DECL. */ | |
253 | lp->backend_decl = label_decl; | |
254 | return label_decl; | |
255 | } | |
256 | } | |
257 | ||
258 | ||
259 | /* Convert a gfc_symbol to an identifier of the same name. */ | |
260 | ||
261 | static tree | |
262 | gfc_sym_identifier (gfc_symbol * sym) | |
263 | { | |
264 | return (get_identifier (sym->name)); | |
265 | } | |
266 | ||
267 | ||
268 | /* Construct mangled name from symbol name. */ | |
269 | ||
270 | static tree | |
271 | gfc_sym_mangled_identifier (gfc_symbol * sym) | |
272 | { | |
273 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; | |
274 | ||
4f0fae8e | 275 | if (sym->module == NULL) |
4ee9c684 | 276 | return gfc_sym_identifier (sym); |
277 | else | |
278 | { | |
279 | snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name); | |
280 | return get_identifier (name); | |
281 | } | |
282 | } | |
283 | ||
284 | ||
285 | /* Construct mangled function name from symbol name. */ | |
286 | ||
287 | static tree | |
288 | gfc_sym_mangled_function_id (gfc_symbol * sym) | |
289 | { | |
290 | int has_underscore; | |
291 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; | |
292 | ||
4f0fae8e | 293 | if (sym->module == NULL || sym->attr.proc == PROC_EXTERNAL |
294 | || (sym->module != NULL && sym->attr.if_source == IFSRC_IFBODY)) | |
4ee9c684 | 295 | { |
296 | if (strcmp (sym->name, "MAIN__") == 0 | |
297 | || sym->attr.proc == PROC_INTRINSIC) | |
298 | return get_identifier (sym->name); | |
299 | ||
300 | if (gfc_option.flag_underscoring) | |
301 | { | |
302 | has_underscore = strchr (sym->name, '_') != 0; | |
303 | if (gfc_option.flag_second_underscore && has_underscore) | |
304 | snprintf (name, sizeof name, "%s__", sym->name); | |
305 | else | |
306 | snprintf (name, sizeof name, "%s_", sym->name); | |
307 | return get_identifier (name); | |
308 | } | |
309 | else | |
310 | return get_identifier (sym->name); | |
311 | } | |
312 | else | |
313 | { | |
314 | snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name); | |
315 | return get_identifier (name); | |
316 | } | |
317 | } | |
318 | ||
319 | ||
5ed82495 | 320 | /* Returns true if a variable of specified size should go on the stack. */ |
321 | ||
322 | int | |
323 | gfc_can_put_var_on_stack (tree size) | |
324 | { | |
325 | unsigned HOST_WIDE_INT low; | |
326 | ||
327 | if (!INTEGER_CST_P (size)) | |
328 | return 0; | |
329 | ||
330 | if (gfc_option.flag_max_stack_var_size < 0) | |
331 | return 1; | |
332 | ||
333 | if (TREE_INT_CST_HIGH (size) != 0) | |
334 | return 0; | |
335 | ||
336 | low = TREE_INT_CST_LOW (size); | |
337 | if (low > (unsigned HOST_WIDE_INT) gfc_option.flag_max_stack_var_size) | |
338 | return 0; | |
339 | ||
340 | /* TODO: Set a per-function stack size limit. */ | |
341 | ||
342 | return 1; | |
343 | } | |
344 | ||
345 | ||
4ee9c684 | 346 | /* Finish processing of a declaration and install its initial value. */ |
347 | ||
348 | static void | |
349 | gfc_finish_decl (tree decl, tree init) | |
350 | { | |
351 | if (TREE_CODE (decl) == PARM_DECL) | |
22d678e8 | 352 | gcc_assert (init == NULL_TREE); |
4ee9c684 | 353 | /* Remember that PARM_DECL doesn't have a DECL_INITIAL field per se |
354 | -- it overlaps DECL_ARG_TYPE. */ | |
355 | else if (init == NULL_TREE) | |
22d678e8 | 356 | gcc_assert (DECL_INITIAL (decl) == NULL_TREE); |
4ee9c684 | 357 | else |
22d678e8 | 358 | gcc_assert (DECL_INITIAL (decl) == error_mark_node); |
4ee9c684 | 359 | |
360 | if (init != NULL_TREE) | |
361 | { | |
362 | if (TREE_CODE (decl) != TYPE_DECL) | |
363 | DECL_INITIAL (decl) = init; | |
364 | else | |
365 | { | |
366 | /* typedef foo = bar; store the type of bar as the type of foo. */ | |
367 | TREE_TYPE (decl) = TREE_TYPE (init); | |
368 | DECL_INITIAL (decl) = init = 0; | |
369 | } | |
370 | } | |
371 | ||
372 | if (TREE_CODE (decl) == VAR_DECL) | |
373 | { | |
374 | if (DECL_SIZE (decl) == NULL_TREE | |
375 | && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE) | |
376 | layout_decl (decl, 0); | |
377 | ||
378 | /* A static variable with an incomplete type is an error if it is | |
379 | initialized. Also if it is not file scope. Otherwise, let it | |
380 | through, but if it is not `extern' then it may cause an error | |
381 | message later. */ | |
382 | /* An automatic variable with an incomplete type is an error. */ | |
383 | if (DECL_SIZE (decl) == NULL_TREE | |
384 | && (TREE_STATIC (decl) ? (DECL_INITIAL (decl) != 0 | |
385 | || DECL_CONTEXT (decl) != 0) | |
386 | : !DECL_EXTERNAL (decl))) | |
387 | { | |
388 | gfc_fatal_error ("storage size not known"); | |
389 | } | |
390 | ||
391 | if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl)) | |
392 | && (DECL_SIZE (decl) != 0) | |
393 | && (TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)) | |
394 | { | |
395 | gfc_fatal_error ("storage size not constant"); | |
396 | } | |
397 | } | |
398 | ||
399 | } | |
400 | ||
401 | ||
402 | /* Apply symbol attributes to a variable, and add it to the function scope. */ | |
403 | ||
404 | static void | |
405 | gfc_finish_var_decl (tree decl, gfc_symbol * sym) | |
406 | { | |
f888a3fb | 407 | /* TREE_ADDRESSABLE means the address of this variable is actually needed. |
4ee9c684 | 408 | This is the equivalent of the TARGET variables. |
409 | We also need to set this if the variable is passed by reference in a | |
410 | CALL statement. */ | |
411 | if (sym->attr.target) | |
412 | TREE_ADDRESSABLE (decl) = 1; | |
413 | /* If it wasn't used we wouldn't be getting it. */ | |
414 | TREE_USED (decl) = 1; | |
415 | ||
416 | /* Chain this decl to the pending declarations. Don't do pushdecl() | |
417 | because this would add them to the current scope rather than the | |
418 | function scope. */ | |
419 | if (current_function_decl != NULL_TREE) | |
420 | { | |
421 | if (sym->ns->proc_name->backend_decl == current_function_decl) | |
422 | gfc_add_decl_to_function (decl); | |
423 | else | |
424 | gfc_add_decl_to_parent_function (decl); | |
425 | } | |
426 | ||
427 | /* If a variable is USE associated, it's always external. */ | |
428 | if (sym->attr.use_assoc) | |
429 | { | |
430 | DECL_EXTERNAL (decl) = 1; | |
431 | TREE_PUBLIC (decl) = 1; | |
432 | } | |
4f0fae8e | 433 | else if (sym->module && !sym->attr.result && !sym->attr.dummy) |
4ee9c684 | 434 | { |
6b20224d | 435 | /* TODO: Don't set sym->module for result or dummy variables. */ |
22d678e8 | 436 | gcc_assert (current_function_decl == NULL_TREE); |
4ee9c684 | 437 | /* This is the declaration of a module variable. */ |
438 | TREE_PUBLIC (decl) = 1; | |
439 | TREE_STATIC (decl) = 1; | |
440 | } | |
441 | ||
442 | if ((sym->attr.save || sym->attr.data || sym->value) | |
443 | && !sym->attr.use_assoc) | |
444 | TREE_STATIC (decl) = 1; | |
445 | ||
446 | /* Keep variables larger than max-stack-var-size off stack. */ | |
447 | if (!sym->ns->proc_name->attr.recursive | |
448 | && INTEGER_CST_P (DECL_SIZE_UNIT (decl)) | |
449 | && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))) | |
450 | TREE_STATIC (decl) = 1; | |
451 | } | |
452 | ||
453 | ||
454 | /* Allocate the lang-specific part of a decl. */ | |
455 | ||
456 | void | |
457 | gfc_allocate_lang_decl (tree decl) | |
458 | { | |
459 | DECL_LANG_SPECIFIC (decl) = (struct lang_decl *) | |
460 | ggc_alloc_cleared (sizeof (struct lang_decl)); | |
461 | } | |
462 | ||
463 | /* Remember a symbol to generate initialization/cleanup code at function | |
464 | entry/exit. */ | |
465 | ||
466 | static void | |
467 | gfc_defer_symbol_init (gfc_symbol * sym) | |
468 | { | |
469 | gfc_symbol *p; | |
470 | gfc_symbol *last; | |
471 | gfc_symbol *head; | |
472 | ||
473 | /* Don't add a symbol twice. */ | |
474 | if (sym->tlink) | |
475 | return; | |
476 | ||
477 | last = head = sym->ns->proc_name; | |
478 | p = last->tlink; | |
479 | ||
480 | /* Make sure that setup code for dummy variables which are used in the | |
481 | setup of other variables is generated first. */ | |
482 | if (sym->attr.dummy) | |
483 | { | |
484 | /* Find the first dummy arg seen after us, or the first non-dummy arg. | |
485 | This is a circular list, so don't go past the head. */ | |
486 | while (p != head | |
487 | && (!p->attr.dummy || p->dummy_order > sym->dummy_order)) | |
488 | { | |
489 | last = p; | |
490 | p = p->tlink; | |
491 | } | |
492 | } | |
493 | /* Insert in between last and p. */ | |
494 | last->tlink = sym; | |
495 | sym->tlink = p; | |
496 | } | |
497 | ||
498 | ||
499 | /* Create an array index type variable with function scope. */ | |
500 | ||
501 | static tree | |
502 | create_index_var (const char * pfx, int nest) | |
503 | { | |
504 | tree decl; | |
505 | ||
506 | decl = gfc_create_var_np (gfc_array_index_type, pfx); | |
507 | if (nest) | |
508 | gfc_add_decl_to_parent_function (decl); | |
509 | else | |
510 | gfc_add_decl_to_function (decl); | |
511 | return decl; | |
512 | } | |
513 | ||
514 | ||
515 | /* Create variables to hold all the non-constant bits of info for a | |
516 | descriptorless array. Remember these in the lang-specific part of the | |
517 | type. */ | |
518 | ||
519 | static void | |
520 | gfc_build_qualified_array (tree decl, gfc_symbol * sym) | |
521 | { | |
522 | tree type; | |
523 | int dim; | |
524 | int nest; | |
525 | ||
526 | type = TREE_TYPE (decl); | |
527 | ||
528 | /* We just use the descriptor, if there is one. */ | |
529 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
530 | return; | |
531 | ||
22d678e8 | 532 | gcc_assert (GFC_ARRAY_TYPE_P (type)); |
4ee9c684 | 533 | nest = (sym->ns->proc_name->backend_decl != current_function_decl) |
534 | && !sym->attr.contained; | |
535 | ||
536 | for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++) | |
537 | { | |
538 | if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) | |
539 | GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); | |
540 | /* Don't try to use the unkown bound for assumed shape arrays. */ | |
541 | if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE | |
542 | && (sym->as->type != AS_ASSUMED_SIZE | |
543 | || dim < GFC_TYPE_ARRAY_RANK (type) - 1)) | |
544 | GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); | |
545 | ||
546 | if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE) | |
547 | GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest); | |
548 | } | |
549 | if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE) | |
550 | { | |
551 | GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type, | |
552 | "offset"); | |
553 | if (nest) | |
554 | gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type)); | |
555 | else | |
556 | gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type)); | |
557 | } | |
558 | } | |
559 | ||
560 | ||
561 | /* For some dummy arguments we don't use the actual argument directly. | |
5ed82495 | 562 | Instead we create a local decl and use that. This allows us to perform |
4ee9c684 | 563 | initialization, and construct full type information. */ |
564 | ||
565 | static tree | |
566 | gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy) | |
567 | { | |
568 | tree decl; | |
569 | tree type; | |
570 | gfc_array_spec *as; | |
571 | char *name; | |
572 | int packed; | |
573 | int n; | |
574 | bool known_size; | |
575 | ||
576 | if (sym->attr.pointer || sym->attr.allocatable) | |
577 | return dummy; | |
578 | ||
579 | /* Add to list of variables if not a fake result variable. */ | |
580 | if (sym->attr.result || sym->attr.dummy) | |
581 | gfc_defer_symbol_init (sym); | |
582 | ||
583 | type = TREE_TYPE (dummy); | |
22d678e8 | 584 | gcc_assert (TREE_CODE (dummy) == PARM_DECL |
4ee9c684 | 585 | && POINTER_TYPE_P (type)); |
586 | ||
f888a3fb | 587 | /* Do we know the element size? */ |
4ee9c684 | 588 | known_size = sym->ts.type != BT_CHARACTER |
589 | || INTEGER_CST_P (sym->ts.cl->backend_decl); | |
590 | ||
591 | if (known_size && !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (type))) | |
592 | { | |
593 | /* For descriptorless arrays with known element size the actual | |
594 | argument is sufficient. */ | |
22d678e8 | 595 | gcc_assert (GFC_ARRAY_TYPE_P (type)); |
4ee9c684 | 596 | gfc_build_qualified_array (dummy, sym); |
597 | return dummy; | |
598 | } | |
599 | ||
600 | type = TREE_TYPE (type); | |
601 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
602 | { | |
603 | /* Create a decriptorless array pointer. */ | |
604 | as = sym->as; | |
605 | packed = 0; | |
606 | if (!gfc_option.flag_repack_arrays) | |
607 | { | |
608 | if (as->type == AS_ASSUMED_SIZE) | |
609 | packed = 2; | |
610 | } | |
611 | else | |
612 | { | |
613 | if (as->type == AS_EXPLICIT) | |
614 | { | |
615 | packed = 2; | |
616 | for (n = 0; n < as->rank; n++) | |
617 | { | |
618 | if (!(as->upper[n] | |
619 | && as->lower[n] | |
620 | && as->upper[n]->expr_type == EXPR_CONSTANT | |
621 | && as->lower[n]->expr_type == EXPR_CONSTANT)) | |
622 | packed = 1; | |
623 | } | |
624 | } | |
625 | else | |
626 | packed = 1; | |
627 | } | |
628 | ||
629 | type = gfc_typenode_for_spec (&sym->ts); | |
630 | type = gfc_get_nodesc_array_type (type, sym->as, packed); | |
631 | } | |
632 | else | |
633 | { | |
634 | /* We now have an expression for the element size, so create a fully | |
635 | qualified type. Reset sym->backend decl or this will just return the | |
636 | old type. */ | |
637 | sym->backend_decl = NULL_TREE; | |
638 | type = gfc_sym_type (sym); | |
639 | packed = 2; | |
640 | } | |
641 | ||
642 | ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0); | |
643 | decl = build_decl (VAR_DECL, get_identifier (name), type); | |
644 | ||
645 | DECL_ARTIFICIAL (decl) = 1; | |
646 | TREE_PUBLIC (decl) = 0; | |
647 | TREE_STATIC (decl) = 0; | |
648 | DECL_EXTERNAL (decl) = 0; | |
649 | ||
650 | /* We should never get deferred shape arrays here. We used to because of | |
651 | frontend bugs. */ | |
22d678e8 | 652 | gcc_assert (sym->as->type != AS_DEFERRED); |
4ee9c684 | 653 | |
654 | switch (packed) | |
655 | { | |
656 | case 1: | |
657 | GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1; | |
658 | break; | |
659 | ||
660 | case 2: | |
661 | GFC_DECL_PACKED_ARRAY (decl) = 1; | |
662 | break; | |
663 | } | |
664 | ||
665 | gfc_build_qualified_array (decl, sym); | |
666 | ||
667 | if (DECL_LANG_SPECIFIC (dummy)) | |
668 | DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy); | |
669 | else | |
670 | gfc_allocate_lang_decl (decl); | |
671 | ||
672 | GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy; | |
673 | ||
674 | if (sym->ns->proc_name->backend_decl == current_function_decl | |
675 | || sym->attr.contained) | |
676 | gfc_add_decl_to_function (decl); | |
677 | else | |
678 | gfc_add_decl_to_parent_function (decl); | |
679 | ||
680 | return decl; | |
681 | } | |
682 | ||
683 | ||
684 | /* Return a constant or a variable to use as a string length. Does not | |
685 | add the decl to the current scope. */ | |
686 | ||
687 | static tree | |
688 | gfc_create_string_length (gfc_symbol * sym) | |
689 | { | |
690 | tree length; | |
691 | ||
22d678e8 | 692 | gcc_assert (sym->ts.cl); |
4ee9c684 | 693 | gfc_conv_const_charlen (sym->ts.cl); |
694 | ||
695 | if (sym->ts.cl->backend_decl == NULL_TREE) | |
696 | { | |
697 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; | |
698 | ||
699 | /* Also prefix the mangled name. */ | |
700 | strcpy (&name[1], sym->name); | |
701 | name[0] = '.'; | |
702 | length = build_decl (VAR_DECL, get_identifier (name), | |
9ad09405 | 703 | gfc_charlen_type_node); |
4ee9c684 | 704 | DECL_ARTIFICIAL (length) = 1; |
705 | TREE_USED (length) = 1; | |
706 | gfc_defer_symbol_init (sym); | |
707 | sym->ts.cl->backend_decl = length; | |
708 | } | |
709 | ||
710 | return sym->ts.cl->backend_decl; | |
711 | } | |
712 | ||
713 | ||
714 | /* Return the decl for a gfc_symbol, create it if it doesn't already | |
715 | exist. */ | |
716 | ||
717 | tree | |
718 | gfc_get_symbol_decl (gfc_symbol * sym) | |
719 | { | |
720 | tree decl; | |
721 | tree length = NULL_TREE; | |
4ee9c684 | 722 | int byref; |
723 | ||
22d678e8 | 724 | gcc_assert (sym->attr.referenced); |
4ee9c684 | 725 | |
726 | if (sym->ns && sym->ns->proc_name->attr.function) | |
727 | byref = gfc_return_by_reference (sym->ns->proc_name); | |
728 | else | |
729 | byref = 0; | |
730 | ||
731 | if ((sym->attr.dummy && ! sym->attr.function) || (sym->attr.result && byref)) | |
732 | { | |
733 | /* Return via extra parameter. */ | |
734 | if (sym->attr.result && byref | |
735 | && !sym->backend_decl) | |
736 | { | |
737 | sym->backend_decl = | |
738 | DECL_ARGUMENTS (sym->ns->proc_name->backend_decl); | |
c6871095 | 739 | /* For entry master function skip over the __entry |
740 | argument. */ | |
741 | if (sym->ns->proc_name->attr.entry_master) | |
742 | sym->backend_decl = TREE_CHAIN (sym->backend_decl); | |
4ee9c684 | 743 | } |
744 | ||
745 | /* Dummy variables should already have been created. */ | |
22d678e8 | 746 | gcc_assert (sym->backend_decl); |
4ee9c684 | 747 | |
748 | /* Create a character length variable. */ | |
749 | if (sym->ts.type == BT_CHARACTER) | |
750 | { | |
751 | if (sym->ts.cl->backend_decl == NULL_TREE) | |
752 | { | |
753 | length = gfc_create_string_length (sym); | |
754 | if (TREE_CODE (length) != INTEGER_CST) | |
755 | { | |
756 | gfc_finish_var_decl (length, sym); | |
757 | gfc_defer_symbol_init (sym); | |
758 | } | |
759 | } | |
760 | } | |
761 | ||
762 | /* Use a copy of the descriptor for dummy arrays. */ | |
763 | if (sym->attr.dimension && !TREE_USED (sym->backend_decl)) | |
764 | { | |
765 | sym->backend_decl = | |
766 | gfc_build_dummy_array_decl (sym, sym->backend_decl); | |
767 | } | |
768 | ||
769 | TREE_USED (sym->backend_decl) = 1; | |
770 | return sym->backend_decl; | |
771 | } | |
772 | ||
773 | if (sym->backend_decl) | |
774 | return sym->backend_decl; | |
775 | ||
4ee9c684 | 776 | /* Catch function declarations. Only used for actual parameters. */ |
777 | if (sym->attr.flavor == FL_PROCEDURE) | |
778 | { | |
779 | decl = gfc_get_extern_function_decl (sym); | |
780 | return decl; | |
781 | } | |
782 | ||
783 | if (sym->attr.intrinsic) | |
784 | internal_error ("intrinsic variable which isn't a procedure"); | |
785 | ||
786 | /* Create string length decl first so that they can be used in the | |
787 | type declaration. */ | |
788 | if (sym->ts.type == BT_CHARACTER) | |
789 | length = gfc_create_string_length (sym); | |
790 | ||
791 | /* Create the decl for the variable. */ | |
792 | decl = build_decl (VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym)); | |
793 | ||
b31f705b | 794 | gfc_set_decl_location (decl, &sym->declared_at); |
795 | ||
f888a3fb | 796 | /* Symbols from modules should have their assembler names mangled. |
4ee9c684 | 797 | This is done here rather than in gfc_finish_var_decl because it |
798 | is different for string length variables. */ | |
4f0fae8e | 799 | if (sym->module) |
4ee9c684 | 800 | SET_DECL_ASSEMBLER_NAME (decl, gfc_sym_mangled_identifier (sym)); |
801 | ||
802 | if (sym->attr.dimension) | |
803 | { | |
804 | /* Create variables to hold the non-constant bits of array info. */ | |
805 | gfc_build_qualified_array (decl, sym); | |
806 | ||
807 | /* Remember this variable for allocation/cleanup. */ | |
808 | gfc_defer_symbol_init (sym); | |
809 | ||
810 | if ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer) | |
811 | GFC_DECL_PACKED_ARRAY (decl) = 1; | |
812 | } | |
813 | ||
814 | gfc_finish_var_decl (decl, sym); | |
815 | ||
816 | if (sym->attr.assign) | |
817 | { | |
818 | gfc_allocate_lang_decl (decl); | |
819 | GFC_DECL_ASSIGN (decl) = 1; | |
9ad09405 | 820 | length = gfc_create_var (gfc_charlen_type_node, sym->name); |
4ee9c684 | 821 | GFC_DECL_STRING_LEN (decl) = length; |
822 | GFC_DECL_ASSIGN_ADDR (decl) = gfc_create_var (pvoid_type_node, sym->name); | |
823 | /* TODO: Need to check we don't change TREE_STATIC (decl) later. */ | |
824 | TREE_STATIC (length) = TREE_STATIC (decl); | |
825 | /* STRING_LENGTH is also used as flag. Less than -1 means that | |
826 | ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the | |
827 | target label's address. Other value is the length of format string | |
828 | and ASSIGN_ADDR is the address of format string. */ | |
7016c612 | 829 | DECL_INITIAL (length) = build_int_cst (NULL_TREE, -2); |
4ee9c684 | 830 | } |
831 | ||
bda1f152 | 832 | if (sym->ts.type == BT_CHARACTER) |
4ee9c684 | 833 | { |
4ee9c684 | 834 | /* Character variables need special handling. */ |
835 | gfc_allocate_lang_decl (decl); | |
836 | ||
bda1f152 | 837 | if (TREE_CODE (length) != INTEGER_CST) |
4ee9c684 | 838 | { |
839 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; | |
840 | ||
4f0fae8e | 841 | if (sym->module) |
4ee9c684 | 842 | { |
843 | /* Also prefix the mangled name for symbols from modules. */ | |
844 | strcpy (&name[1], sym->name); | |
845 | name[0] = '.'; | |
846 | strcpy (&name[1], | |
847 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (length))); | |
848 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (name)); | |
849 | } | |
850 | gfc_finish_var_decl (length, sym); | |
22d678e8 | 851 | gcc_assert (!sym->value); |
4ee9c684 | 852 | } |
4ee9c684 | 853 | } |
854 | sym->backend_decl = decl; | |
855 | ||
bda1f152 | 856 | if (TREE_STATIC (decl) && !sym->attr.use_assoc) |
857 | { | |
858 | /* Add static initializer. */ | |
859 | DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, | |
860 | TREE_TYPE (decl), sym->attr.dimension, | |
861 | sym->attr.pointer || sym->attr.allocatable); | |
862 | } | |
863 | ||
4ee9c684 | 864 | return decl; |
865 | } | |
866 | ||
867 | ||
dbe60343 | 868 | /* Substitute a temporary variable in place of the real one. */ |
869 | ||
870 | void | |
871 | gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save) | |
872 | { | |
873 | save->attr = sym->attr; | |
874 | save->decl = sym->backend_decl; | |
875 | ||
876 | gfc_clear_attr (&sym->attr); | |
877 | sym->attr.referenced = 1; | |
878 | sym->attr.flavor = FL_VARIABLE; | |
879 | ||
880 | sym->backend_decl = decl; | |
881 | } | |
882 | ||
883 | ||
884 | /* Restore the original variable. */ | |
885 | ||
886 | void | |
887 | gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save) | |
888 | { | |
889 | sym->attr = save->attr; | |
890 | sym->backend_decl = save->decl; | |
891 | } | |
892 | ||
893 | ||
4ee9c684 | 894 | /* Get a basic decl for an external function. */ |
895 | ||
896 | tree | |
897 | gfc_get_extern_function_decl (gfc_symbol * sym) | |
898 | { | |
899 | tree type; | |
900 | tree fndecl; | |
901 | gfc_expr e; | |
902 | gfc_intrinsic_sym *isym; | |
903 | gfc_expr argexpr; | |
bdaed7d2 | 904 | char s[GFC_MAX_SYMBOL_LEN + 13]; /* "f2c_specific" and '\0'. */ |
4ee9c684 | 905 | tree name; |
906 | tree mangled_name; | |
907 | ||
908 | if (sym->backend_decl) | |
909 | return sym->backend_decl; | |
910 | ||
1b716045 | 911 | /* We should never be creating external decls for alternate entry points. |
912 | The procedure may be an alternate entry point, but we don't want/need | |
913 | to know that. */ | |
22d678e8 | 914 | gcc_assert (!(sym->attr.entry || sym->attr.entry_master)); |
1b716045 | 915 | |
4ee9c684 | 916 | if (sym->attr.intrinsic) |
917 | { | |
918 | /* Call the resolution function to get the actual name. This is | |
919 | a nasty hack which relies on the resolution functions only looking | |
920 | at the first argument. We pass NULL for the second argument | |
921 | otherwise things like AINT get confused. */ | |
922 | isym = gfc_find_function (sym->name); | |
22d678e8 | 923 | gcc_assert (isym->resolve.f0 != NULL); |
4ee9c684 | 924 | |
925 | memset (&e, 0, sizeof (e)); | |
926 | e.expr_type = EXPR_FUNCTION; | |
927 | ||
928 | memset (&argexpr, 0, sizeof (argexpr)); | |
22d678e8 | 929 | gcc_assert (isym->formal); |
4ee9c684 | 930 | argexpr.ts = isym->formal->ts; |
931 | ||
932 | if (isym->formal->next == NULL) | |
933 | isym->resolve.f1 (&e, &argexpr); | |
934 | else | |
935 | { | |
936 | /* All specific intrinsics take one or two arguments. */ | |
22d678e8 | 937 | gcc_assert (isym->formal->next->next == NULL); |
4ee9c684 | 938 | isym->resolve.f2 (&e, &argexpr, NULL); |
939 | } | |
bdaed7d2 | 940 | |
941 | if (gfc_option.flag_f2c | |
942 | && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind) | |
943 | || e.ts.type == BT_COMPLEX)) | |
944 | { | |
945 | /* Specific which needs a different implementation if f2c | |
946 | calling conventions are used. */ | |
947 | sprintf (s, "f2c_specific%s", e.value.function.name); | |
948 | } | |
949 | else | |
950 | sprintf (s, "specific%s", e.value.function.name); | |
951 | ||
4ee9c684 | 952 | name = get_identifier (s); |
953 | mangled_name = name; | |
954 | } | |
955 | else | |
956 | { | |
957 | name = gfc_sym_identifier (sym); | |
958 | mangled_name = gfc_sym_mangled_function_id (sym); | |
959 | } | |
960 | ||
961 | type = gfc_get_function_type (sym); | |
962 | fndecl = build_decl (FUNCTION_DECL, name, type); | |
963 | ||
964 | SET_DECL_ASSEMBLER_NAME (fndecl, mangled_name); | |
965 | /* If the return type is a pointer, avoid alias issues by setting | |
966 | DECL_IS_MALLOC to nonzero. This means that the function should be | |
967 | treated as if it were a malloc, meaning it returns a pointer that | |
968 | is not an alias. */ | |
969 | if (POINTER_TYPE_P (type)) | |
970 | DECL_IS_MALLOC (fndecl) = 1; | |
971 | ||
972 | /* Set the context of this decl. */ | |
973 | if (0 && sym->ns && sym->ns->proc_name) | |
974 | { | |
975 | /* TODO: Add external decls to the appropriate scope. */ | |
976 | DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl; | |
977 | } | |
978 | else | |
979 | { | |
f888a3fb | 980 | /* Global declaration, e.g. intrinsic subroutine. */ |
4ee9c684 | 981 | DECL_CONTEXT (fndecl) = NULL_TREE; |
982 | } | |
983 | ||
984 | DECL_EXTERNAL (fndecl) = 1; | |
985 | ||
f888a3fb | 986 | /* This specifies if a function is globally addressable, i.e. it is |
4ee9c684 | 987 | the opposite of declaring static in C. */ |
988 | TREE_PUBLIC (fndecl) = 1; | |
989 | ||
990 | /* Set attributes for PURE functions. A call to PURE function in the | |
991 | Fortran 95 sense is both pure and without side effects in the C | |
992 | sense. */ | |
993 | if (sym->attr.pure || sym->attr.elemental) | |
994 | { | |
be393645 | 995 | if (sym->attr.function) |
996 | DECL_IS_PURE (fndecl) = 1; | |
997 | /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT) | |
998 | parameters and don't use alternate returns (is this | |
999 | allowed?). In that case, calls to them are meaningless, and | |
1b716045 | 1000 | can be optimized away. See also in build_function_decl(). */ |
be393645 | 1001 | TREE_SIDE_EFFECTS (fndecl) = 0; |
4ee9c684 | 1002 | } |
1003 | ||
1004 | sym->backend_decl = fndecl; | |
1005 | ||
1006 | if (DECL_CONTEXT (fndecl) == NULL_TREE) | |
1007 | pushdecl_top_level (fndecl); | |
1008 | ||
1009 | return fndecl; | |
1010 | } | |
1011 | ||
1012 | ||
1013 | /* Create a declaration for a procedure. For external functions (in the C | |
1b716045 | 1014 | sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is |
1015 | a master function with alternate entry points. */ | |
4ee9c684 | 1016 | |
1b716045 | 1017 | static void |
1018 | build_function_decl (gfc_symbol * sym) | |
4ee9c684 | 1019 | { |
1b716045 | 1020 | tree fndecl, type; |
4ee9c684 | 1021 | symbol_attribute attr; |
1b716045 | 1022 | tree result_decl; |
4ee9c684 | 1023 | gfc_formal_arglist *f; |
1024 | ||
22d678e8 | 1025 | gcc_assert (!sym->backend_decl); |
1026 | gcc_assert (!sym->attr.external); | |
4ee9c684 | 1027 | |
b31f705b | 1028 | /* Set the line and filename. sym->declared_at seems to point to the |
1029 | last statement for subroutines, but it'll do for now. */ | |
1030 | gfc_set_backend_locus (&sym->declared_at); | |
1031 | ||
4ee9c684 | 1032 | /* Allow only one nesting level. Allow public declarations. */ |
22d678e8 | 1033 | gcc_assert (current_function_decl == NULL_TREE |
4ee9c684 | 1034 | || DECL_CONTEXT (current_function_decl) == NULL_TREE); |
1035 | ||
1036 | type = gfc_get_function_type (sym); | |
1037 | fndecl = build_decl (FUNCTION_DECL, gfc_sym_identifier (sym), type); | |
1038 | ||
1039 | /* Perform name mangling if this is a top level or module procedure. */ | |
1040 | if (current_function_decl == NULL_TREE) | |
1041 | SET_DECL_ASSEMBLER_NAME (fndecl, gfc_sym_mangled_function_id (sym)); | |
1042 | ||
1043 | /* Figure out the return type of the declared function, and build a | |
f888a3fb | 1044 | RESULT_DECL for it. If this is a subroutine with alternate |
4ee9c684 | 1045 | returns, build a RESULT_DECL for it. */ |
1046 | attr = sym->attr; | |
1047 | ||
1048 | result_decl = NULL_TREE; | |
1049 | /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */ | |
1050 | if (attr.function) | |
1051 | { | |
1052 | if (gfc_return_by_reference (sym)) | |
1053 | type = void_type_node; | |
1054 | else | |
1055 | { | |
1056 | if (sym->result != sym) | |
1057 | result_decl = gfc_sym_identifier (sym->result); | |
1058 | ||
1059 | type = TREE_TYPE (TREE_TYPE (fndecl)); | |
1060 | } | |
1061 | } | |
1062 | else | |
1063 | { | |
1064 | /* Look for alternate return placeholders. */ | |
1065 | int has_alternate_returns = 0; | |
1066 | for (f = sym->formal; f; f = f->next) | |
1067 | { | |
1068 | if (f->sym == NULL) | |
1069 | { | |
1070 | has_alternate_returns = 1; | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (has_alternate_returns) | |
1076 | type = integer_type_node; | |
1077 | else | |
1078 | type = void_type_node; | |
1079 | } | |
1080 | ||
1081 | result_decl = build_decl (RESULT_DECL, result_decl, type); | |
540edea7 | 1082 | DECL_ARTIFICIAL (result_decl) = 1; |
1083 | DECL_IGNORED_P (result_decl) = 1; | |
4ee9c684 | 1084 | DECL_CONTEXT (result_decl) = fndecl; |
1085 | DECL_RESULT (fndecl) = result_decl; | |
1086 | ||
1087 | /* Don't call layout_decl for a RESULT_DECL. | |
f888a3fb | 1088 | layout_decl (result_decl, 0); */ |
4ee9c684 | 1089 | |
1090 | /* If the return type is a pointer, avoid alias issues by setting | |
1091 | DECL_IS_MALLOC to nonzero. This means that the function should be | |
1092 | treated as if it were a malloc, meaning it returns a pointer that | |
1093 | is not an alias. */ | |
1094 | if (POINTER_TYPE_P (type)) | |
1095 | DECL_IS_MALLOC (fndecl) = 1; | |
1096 | ||
1097 | /* Set up all attributes for the function. */ | |
1098 | DECL_CONTEXT (fndecl) = current_function_decl; | |
1099 | DECL_EXTERNAL (fndecl) = 0; | |
1100 | ||
9d138f47 | 1101 | /* This specifies if a function is globally visible, i.e. it is |
dfc222eb | 1102 | the opposite of declaring static in C. */ |
1b716045 | 1103 | if (DECL_CONTEXT (fndecl) == NULL_TREE |
1104 | && !sym->attr.entry_master) | |
4ee9c684 | 1105 | TREE_PUBLIC (fndecl) = 1; |
1106 | ||
1107 | /* TREE_STATIC means the function body is defined here. */ | |
e4b2c26c | 1108 | TREE_STATIC (fndecl) = 1; |
4ee9c684 | 1109 | |
f888a3fb | 1110 | /* Set attributes for PURE functions. A call to a PURE function in the |
4ee9c684 | 1111 | Fortran 95 sense is both pure and without side effects in the C |
1112 | sense. */ | |
1113 | if (attr.pure || attr.elemental) | |
1114 | { | |
be393645 | 1115 | /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments |
1116 | including a alternate return. In that case it can also be | |
231e961a | 1117 | marked as PURE. See also in gfc_get_extern_function_decl(). */ |
be393645 | 1118 | if (attr.function) |
1119 | DECL_IS_PURE (fndecl) = 1; | |
4ee9c684 | 1120 | TREE_SIDE_EFFECTS (fndecl) = 0; |
1121 | } | |
1122 | ||
1123 | /* Layout the function declaration and put it in the binding level | |
1124 | of the current function. */ | |
e4b2c26c | 1125 | pushdecl (fndecl); |
1b716045 | 1126 | |
1127 | sym->backend_decl = fndecl; | |
1128 | } | |
1129 | ||
1130 | ||
1131 | /* Create the DECL_ARGUMENTS for a procedure. */ | |
1132 | ||
1133 | static void | |
1134 | create_function_arglist (gfc_symbol * sym) | |
1135 | { | |
1136 | tree fndecl; | |
1137 | gfc_formal_arglist *f; | |
1138 | tree typelist; | |
1139 | tree arglist; | |
1140 | tree length; | |
1141 | tree type; | |
1142 | tree parm; | |
1143 | ||
1144 | fndecl = sym->backend_decl; | |
1145 | ||
e4b2c26c | 1146 | /* Build formal argument list. Make sure that their TREE_CONTEXT is |
1147 | the new FUNCTION_DECL node. */ | |
e4b2c26c | 1148 | arglist = NULL_TREE; |
1149 | typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); | |
1b716045 | 1150 | |
1151 | if (sym->attr.entry_master) | |
1152 | { | |
1153 | type = TREE_VALUE (typelist); | |
1154 | parm = build_decl (PARM_DECL, get_identifier ("__entry"), type); | |
1155 | ||
1156 | DECL_CONTEXT (parm) = fndecl; | |
1157 | DECL_ARG_TYPE (parm) = type; | |
1158 | TREE_READONLY (parm) = 1; | |
1159 | gfc_finish_decl (parm, NULL_TREE); | |
1160 | ||
1161 | arglist = chainon (arglist, parm); | |
1162 | typelist = TREE_CHAIN (typelist); | |
1163 | } | |
1164 | ||
e4b2c26c | 1165 | if (gfc_return_by_reference (sym)) |
4ee9c684 | 1166 | { |
e4b2c26c | 1167 | type = TREE_VALUE (typelist); |
1168 | parm = build_decl (PARM_DECL, get_identifier ("__result"), type); | |
4ee9c684 | 1169 | |
e4b2c26c | 1170 | DECL_CONTEXT (parm) = fndecl; |
1171 | DECL_ARG_TYPE (parm) = type; | |
1172 | TREE_READONLY (parm) = 1; | |
b5b40b3f | 1173 | DECL_ARTIFICIAL (parm) = 1; |
e4b2c26c | 1174 | gfc_finish_decl (parm, NULL_TREE); |
4ee9c684 | 1175 | |
e4b2c26c | 1176 | arglist = chainon (arglist, parm); |
1177 | typelist = TREE_CHAIN (typelist); | |
4ee9c684 | 1178 | |
e4b2c26c | 1179 | if (sym->ts.type == BT_CHARACTER) |
1180 | { | |
1181 | gfc_allocate_lang_decl (parm); | |
4ee9c684 | 1182 | |
e4b2c26c | 1183 | /* Length of character result. */ |
1184 | type = TREE_VALUE (typelist); | |
22d678e8 | 1185 | gcc_assert (type == gfc_charlen_type_node); |
4ee9c684 | 1186 | |
e4b2c26c | 1187 | length = build_decl (PARM_DECL, |
1188 | get_identifier (".__result"), | |
1189 | type); | |
1190 | if (!sym->ts.cl->length) | |
1191 | { | |
1192 | sym->ts.cl->backend_decl = length; | |
1193 | TREE_USED (length) = 1; | |
4ee9c684 | 1194 | } |
22d678e8 | 1195 | gcc_assert (TREE_CODE (length) == PARM_DECL); |
e4b2c26c | 1196 | arglist = chainon (arglist, length); |
1197 | typelist = TREE_CHAIN (typelist); | |
1198 | DECL_CONTEXT (length) = fndecl; | |
1199 | DECL_ARG_TYPE (length) = type; | |
1200 | TREE_READONLY (length) = 1; | |
b5b40b3f | 1201 | DECL_ARTIFICIAL (length) = 1; |
e4b2c26c | 1202 | gfc_finish_decl (length, NULL_TREE); |
4ee9c684 | 1203 | } |
e4b2c26c | 1204 | } |
4ee9c684 | 1205 | |
e4b2c26c | 1206 | for (f = sym->formal; f; f = f->next) |
1207 | { | |
f888a3fb | 1208 | if (f->sym != NULL) /* ignore alternate returns. */ |
4ee9c684 | 1209 | { |
e4b2c26c | 1210 | length = NULL_TREE; |
4ee9c684 | 1211 | |
e4b2c26c | 1212 | type = TREE_VALUE (typelist); |
4ee9c684 | 1213 | |
e4b2c26c | 1214 | /* Build a the argument declaration. */ |
1215 | parm = build_decl (PARM_DECL, | |
1216 | gfc_sym_identifier (f->sym), type); | |
4ee9c684 | 1217 | |
e4b2c26c | 1218 | /* Fill in arg stuff. */ |
1219 | DECL_CONTEXT (parm) = fndecl; | |
1220 | DECL_ARG_TYPE (parm) = type; | |
1221 | DECL_ARG_TYPE_AS_WRITTEN (parm) = type; | |
1222 | /* All implementation args are read-only. */ | |
1223 | TREE_READONLY (parm) = 1; | |
4ee9c684 | 1224 | |
e4b2c26c | 1225 | gfc_finish_decl (parm, NULL_TREE); |
4ee9c684 | 1226 | |
e4b2c26c | 1227 | f->sym->backend_decl = parm; |
4ee9c684 | 1228 | |
e4b2c26c | 1229 | arglist = chainon (arglist, parm); |
1230 | typelist = TREE_CHAIN (typelist); | |
1231 | } | |
1232 | } | |
4ee9c684 | 1233 | |
e4b2c26c | 1234 | /* Add the hidden string length parameters. */ |
1235 | parm = arglist; | |
1236 | for (f = sym->formal; f; f = f->next) | |
1237 | { | |
1238 | char name[GFC_MAX_SYMBOL_LEN + 2]; | |
1239 | /* Ignore alternate returns. */ | |
1240 | if (f->sym == NULL) | |
1241 | continue; | |
4ee9c684 | 1242 | |
e4b2c26c | 1243 | if (f->sym->ts.type != BT_CHARACTER) |
1244 | continue; | |
4ee9c684 | 1245 | |
e4b2c26c | 1246 | parm = f->sym->backend_decl; |
1247 | type = TREE_VALUE (typelist); | |
22d678e8 | 1248 | gcc_assert (type == gfc_charlen_type_node); |
4ee9c684 | 1249 | |
e4b2c26c | 1250 | strcpy (&name[1], f->sym->name); |
1251 | name[0] = '_'; | |
1252 | length = build_decl (PARM_DECL, get_identifier (name), type); | |
4ee9c684 | 1253 | |
e4b2c26c | 1254 | arglist = chainon (arglist, length); |
1255 | DECL_CONTEXT (length) = fndecl; | |
b5b40b3f | 1256 | DECL_ARTIFICIAL (length) = 1; |
e4b2c26c | 1257 | DECL_ARG_TYPE (length) = type; |
1258 | TREE_READONLY (length) = 1; | |
1259 | gfc_finish_decl (length, NULL_TREE); | |
4ee9c684 | 1260 | |
e4b2c26c | 1261 | /* TODO: Check string lengths when -fbounds-check. */ |
4ee9c684 | 1262 | |
e4b2c26c | 1263 | /* Use the passed value for assumed length variables. */ |
1264 | if (!f->sym->ts.cl->length) | |
1265 | { | |
1266 | TREE_USED (length) = 1; | |
1267 | if (!f->sym->ts.cl->backend_decl) | |
1268 | f->sym->ts.cl->backend_decl = length; | |
1269 | else | |
4ee9c684 | 1270 | { |
e4b2c26c | 1271 | /* there is already another variable using this |
1272 | gfc_charlen node, build a new one for this variable | |
1273 | and chain it into the list of gfc_charlens. | |
1274 | This happens for e.g. in the case | |
1275 | CHARACTER(*)::c1,c2 | |
1276 | since CHARACTER declarations on the same line share | |
1277 | the same gfc_charlen node. */ | |
1278 | gfc_charlen *cl; | |
1279 | ||
1280 | cl = gfc_get_charlen (); | |
1281 | cl->backend_decl = length; | |
1282 | cl->next = f->sym->ts.cl->next; | |
1283 | f->sym->ts.cl->next = cl; | |
1284 | f->sym->ts.cl = cl; | |
4ee9c684 | 1285 | } |
4ee9c684 | 1286 | } |
1287 | ||
e4b2c26c | 1288 | parm = TREE_CHAIN (parm); |
1289 | typelist = TREE_CHAIN (typelist); | |
4ee9c684 | 1290 | } |
e4b2c26c | 1291 | |
22d678e8 | 1292 | gcc_assert (TREE_VALUE (typelist) == void_type_node); |
e4b2c26c | 1293 | DECL_ARGUMENTS (fndecl) = arglist; |
1b716045 | 1294 | } |
e4b2c26c | 1295 | |
1b716045 | 1296 | /* Convert FNDECL's code to GIMPLE and handle any nested functions. */ |
1297 | ||
1298 | static void | |
1299 | gfc_gimplify_function (tree fndecl) | |
1300 | { | |
1301 | struct cgraph_node *cgn; | |
1302 | ||
1303 | gimplify_function_tree (fndecl); | |
1304 | dump_function (TDI_generic, fndecl); | |
1305 | ||
1306 | /* Convert all nested functions to GIMPLE now. We do things in this order | |
1307 | so that items like VLA sizes are expanded properly in the context of the | |
1308 | correct function. */ | |
1309 | cgn = cgraph_node (fndecl); | |
1310 | for (cgn = cgn->nested; cgn; cgn = cgn->next_nested) | |
1311 | gfc_gimplify_function (cgn->decl); | |
1312 | } | |
1313 | ||
1314 | ||
1315 | /* Do the setup necessary before generating the body of a function. */ | |
1316 | ||
1317 | static void | |
1318 | trans_function_start (gfc_symbol * sym) | |
1319 | { | |
1320 | tree fndecl; | |
1321 | ||
1322 | fndecl = sym->backend_decl; | |
1323 | ||
f888a3fb | 1324 | /* Let GCC know the current scope is this function. */ |
1b716045 | 1325 | current_function_decl = fndecl; |
1326 | ||
f888a3fb | 1327 | /* Let the world know what we're about to do. */ |
1b716045 | 1328 | announce_function (fndecl); |
1329 | ||
1330 | if (DECL_CONTEXT (fndecl) == NULL_TREE) | |
1331 | { | |
f888a3fb | 1332 | /* Create RTL for function declaration. */ |
1b716045 | 1333 | rest_of_decl_compilation (fndecl, 1, 0); |
1334 | } | |
1335 | ||
f888a3fb | 1336 | /* Create RTL for function definition. */ |
1b716045 | 1337 | make_decl_rtl (fndecl); |
1338 | ||
1b716045 | 1339 | init_function_start (fndecl); |
1340 | ||
1341 | /* Even though we're inside a function body, we still don't want to | |
1342 | call expand_expr to calculate the size of a variable-sized array. | |
1343 | We haven't necessarily assigned RTL to all variables yet, so it's | |
1344 | not safe to try to expand expressions involving them. */ | |
1345 | cfun->x_dont_save_pending_sizes_p = 1; | |
1346 | ||
f888a3fb | 1347 | /* function.c requires a push at the start of the function. */ |
1b716045 | 1348 | pushlevel (0); |
1349 | } | |
1350 | ||
1351 | /* Create thunks for alternate entry points. */ | |
1352 | ||
1353 | static void | |
1354 | build_entry_thunks (gfc_namespace * ns) | |
1355 | { | |
1356 | gfc_formal_arglist *formal; | |
1357 | gfc_formal_arglist *thunk_formal; | |
1358 | gfc_entry_list *el; | |
1359 | gfc_symbol *thunk_sym; | |
1360 | stmtblock_t body; | |
1361 | tree thunk_fndecl; | |
1362 | tree args; | |
1363 | tree string_args; | |
1364 | tree tmp; | |
b31f705b | 1365 | locus old_loc; |
1b716045 | 1366 | |
1367 | /* This should always be a toplevel function. */ | |
22d678e8 | 1368 | gcc_assert (current_function_decl == NULL_TREE); |
1b716045 | 1369 | |
b31f705b | 1370 | gfc_get_backend_locus (&old_loc); |
1b716045 | 1371 | for (el = ns->entries; el; el = el->next) |
1372 | { | |
1373 | thunk_sym = el->sym; | |
1374 | ||
1375 | build_function_decl (thunk_sym); | |
1376 | create_function_arglist (thunk_sym); | |
1377 | ||
1378 | trans_function_start (thunk_sym); | |
1379 | ||
1380 | thunk_fndecl = thunk_sym->backend_decl; | |
1381 | ||
1382 | gfc_start_block (&body); | |
1383 | ||
f888a3fb | 1384 | /* Pass extra parameter identifying this entry point. */ |
7016c612 | 1385 | tmp = build_int_cst (gfc_array_index_type, el->id); |
1b716045 | 1386 | args = tree_cons (NULL_TREE, tmp, NULL_TREE); |
1387 | string_args = NULL_TREE; | |
1388 | ||
c6871095 | 1389 | if (thunk_sym->attr.function) |
1390 | { | |
1391 | if (gfc_return_by_reference (ns->proc_name)) | |
1392 | { | |
1393 | tree ref = DECL_ARGUMENTS (current_function_decl); | |
1394 | args = tree_cons (NULL_TREE, ref, args); | |
1395 | if (ns->proc_name->ts.type == BT_CHARACTER) | |
1396 | args = tree_cons (NULL_TREE, TREE_CHAIN (ref), | |
1397 | args); | |
1398 | } | |
1399 | } | |
1400 | ||
1b716045 | 1401 | for (formal = ns->proc_name->formal; formal; formal = formal->next) |
1402 | { | |
c6871095 | 1403 | /* Ignore alternate returns. */ |
1404 | if (formal->sym == NULL) | |
1405 | continue; | |
1406 | ||
1b716045 | 1407 | /* We don't have a clever way of identifying arguments, so resort to |
1408 | a brute-force search. */ | |
1409 | for (thunk_formal = thunk_sym->formal; | |
1410 | thunk_formal; | |
1411 | thunk_formal = thunk_formal->next) | |
1412 | { | |
1413 | if (thunk_formal->sym == formal->sym) | |
1414 | break; | |
1415 | } | |
1416 | ||
1417 | if (thunk_formal) | |
1418 | { | |
1419 | /* Pass the argument. */ | |
1420 | args = tree_cons (NULL_TREE, thunk_formal->sym->backend_decl, | |
1421 | args); | |
1422 | if (formal->sym->ts.type == BT_CHARACTER) | |
1423 | { | |
1424 | tmp = thunk_formal->sym->ts.cl->backend_decl; | |
1425 | string_args = tree_cons (NULL_TREE, tmp, string_args); | |
1426 | } | |
1427 | } | |
1428 | else | |
1429 | { | |
1430 | /* Pass NULL for a missing argument. */ | |
1431 | args = tree_cons (NULL_TREE, null_pointer_node, args); | |
1432 | if (formal->sym->ts.type == BT_CHARACTER) | |
1433 | { | |
9ad09405 | 1434 | tmp = convert (gfc_charlen_type_node, integer_zero_node); |
1b716045 | 1435 | string_args = tree_cons (NULL_TREE, tmp, string_args); |
1436 | } | |
1437 | } | |
1438 | } | |
1439 | ||
1440 | /* Call the master function. */ | |
1441 | args = nreverse (args); | |
1442 | args = chainon (args, nreverse (string_args)); | |
1443 | tmp = ns->proc_name->backend_decl; | |
1444 | tmp = gfc_build_function_call (tmp, args); | |
c6871095 | 1445 | if (ns->proc_name->attr.mixed_entry_master) |
1446 | { | |
1447 | tree union_decl, field; | |
1448 | tree master_type = TREE_TYPE (ns->proc_name->backend_decl); | |
1449 | ||
1450 | union_decl = build_decl (VAR_DECL, get_identifier ("__result"), | |
1451 | TREE_TYPE (master_type)); | |
1452 | DECL_ARTIFICIAL (union_decl) = 1; | |
1453 | DECL_EXTERNAL (union_decl) = 0; | |
1454 | TREE_PUBLIC (union_decl) = 0; | |
1455 | TREE_USED (union_decl) = 1; | |
1456 | layout_decl (union_decl, 0); | |
1457 | pushdecl (union_decl); | |
1458 | ||
1459 | DECL_CONTEXT (union_decl) = current_function_decl; | |
1460 | tmp = build2 (MODIFY_EXPR, | |
1461 | TREE_TYPE (union_decl), | |
1462 | union_decl, tmp); | |
1463 | gfc_add_expr_to_block (&body, tmp); | |
1464 | ||
1465 | for (field = TYPE_FIELDS (TREE_TYPE (union_decl)); | |
1466 | field; field = TREE_CHAIN (field)) | |
1467 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), | |
1468 | thunk_sym->result->name) == 0) | |
1469 | break; | |
1470 | gcc_assert (field != NULL_TREE); | |
1471 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), union_decl, field, | |
1472 | NULL_TREE); | |
1473 | tmp = build2 (MODIFY_EXPR, | |
1474 | TREE_TYPE (DECL_RESULT (current_function_decl)), | |
1475 | DECL_RESULT (current_function_decl), tmp); | |
1476 | tmp = build1_v (RETURN_EXPR, tmp); | |
1477 | } | |
1478 | else if (TREE_TYPE (DECL_RESULT (current_function_decl)) | |
1479 | != void_type_node) | |
1480 | { | |
1481 | tmp = build2 (MODIFY_EXPR, | |
1482 | TREE_TYPE (DECL_RESULT (current_function_decl)), | |
1483 | DECL_RESULT (current_function_decl), tmp); | |
1484 | tmp = build1_v (RETURN_EXPR, tmp); | |
1485 | } | |
1b716045 | 1486 | gfc_add_expr_to_block (&body, tmp); |
1487 | ||
1488 | /* Finish off this function and send it for code generation. */ | |
1489 | DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body); | |
1490 | poplevel (1, 0, 1); | |
1491 | BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl; | |
1492 | ||
1493 | /* Output the GENERIC tree. */ | |
1494 | dump_function (TDI_original, thunk_fndecl); | |
1495 | ||
1496 | /* Store the end of the function, so that we get good line number | |
1497 | info for the epilogue. */ | |
1498 | cfun->function_end_locus = input_location; | |
1499 | ||
1500 | /* We're leaving the context of this function, so zap cfun. | |
1501 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in | |
1502 | tree_rest_of_compilation. */ | |
1503 | cfun = NULL; | |
1504 | ||
1505 | current_function_decl = NULL_TREE; | |
1506 | ||
1507 | gfc_gimplify_function (thunk_fndecl); | |
9d95b2b0 | 1508 | cgraph_finalize_function (thunk_fndecl, false); |
1b716045 | 1509 | |
1510 | /* We share the symbols in the formal argument list with other entry | |
1511 | points and the master function. Clear them so that they are | |
1512 | recreated for each function. */ | |
1513 | for (formal = thunk_sym->formal; formal; formal = formal->next) | |
c6871095 | 1514 | if (formal->sym != NULL) /* Ignore alternate returns. */ |
1515 | { | |
1516 | formal->sym->backend_decl = NULL_TREE; | |
1517 | if (formal->sym->ts.type == BT_CHARACTER) | |
1518 | formal->sym->ts.cl->backend_decl = NULL_TREE; | |
1519 | } | |
1520 | ||
1521 | if (thunk_sym->attr.function) | |
1b716045 | 1522 | { |
c6871095 | 1523 | if (thunk_sym->ts.type == BT_CHARACTER) |
1524 | thunk_sym->ts.cl->backend_decl = NULL_TREE; | |
1525 | if (thunk_sym->result->ts.type == BT_CHARACTER) | |
1526 | thunk_sym->result->ts.cl->backend_decl = NULL_TREE; | |
1b716045 | 1527 | } |
1528 | } | |
b31f705b | 1529 | |
1530 | gfc_set_backend_locus (&old_loc); | |
1b716045 | 1531 | } |
1532 | ||
1533 | ||
1534 | /* Create a decl for a function, and create any thunks for alternate entry | |
1535 | points. */ | |
1536 | ||
1537 | void | |
1538 | gfc_create_function_decl (gfc_namespace * ns) | |
1539 | { | |
1540 | /* Create a declaration for the master function. */ | |
1541 | build_function_decl (ns->proc_name); | |
1542 | ||
f888a3fb | 1543 | /* Compile the entry thunks. */ |
1b716045 | 1544 | if (ns->entries) |
1545 | build_entry_thunks (ns); | |
1546 | ||
1547 | /* Now create the read argument list. */ | |
1548 | create_function_arglist (ns->proc_name); | |
1549 | } | |
1550 | ||
4ee9c684 | 1551 | /* Return the decl used to hold the function return value. */ |
1552 | ||
1553 | tree | |
1554 | gfc_get_fake_result_decl (gfc_symbol * sym) | |
1555 | { | |
1556 | tree decl; | |
1557 | tree length; | |
1558 | ||
1559 | char name[GFC_MAX_SYMBOL_LEN + 10]; | |
1560 | ||
c6871095 | 1561 | if (sym |
1562 | && sym->ns->proc_name->backend_decl == current_function_decl | |
1563 | && sym->ns->proc_name->attr.mixed_entry_master | |
1564 | && sym != sym->ns->proc_name) | |
1565 | { | |
1566 | decl = gfc_get_fake_result_decl (sym->ns->proc_name); | |
1567 | if (decl) | |
1568 | { | |
1569 | tree field; | |
1570 | ||
1571 | for (field = TYPE_FIELDS (TREE_TYPE (decl)); | |
1572 | field; field = TREE_CHAIN (field)) | |
1573 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), | |
1574 | sym->name) == 0) | |
1575 | break; | |
1576 | ||
1577 | gcc_assert (field != NULL_TREE); | |
1578 | decl = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, | |
1579 | NULL_TREE); | |
1580 | } | |
1581 | return decl; | |
1582 | } | |
1583 | ||
4ee9c684 | 1584 | if (current_fake_result_decl != NULL_TREE) |
1585 | return current_fake_result_decl; | |
1586 | ||
1587 | /* Only when gfc_get_fake_result_decl is called by gfc_trans_return, | |
1588 | sym is NULL. */ | |
1589 | if (!sym) | |
1590 | return NULL_TREE; | |
1591 | ||
1592 | if (sym->ts.type == BT_CHARACTER | |
1593 | && !sym->ts.cl->backend_decl) | |
1594 | { | |
1595 | length = gfc_create_string_length (sym); | |
1596 | gfc_finish_var_decl (length, sym); | |
1597 | } | |
1598 | ||
1599 | if (gfc_return_by_reference (sym)) | |
1600 | { | |
c6871095 | 1601 | decl = DECL_ARGUMENTS (current_function_decl); |
1602 | ||
1603 | if (sym->ns->proc_name->backend_decl == current_function_decl | |
1604 | && sym->ns->proc_name->attr.entry_master) | |
1605 | decl = TREE_CHAIN (decl); | |
4ee9c684 | 1606 | |
1607 | TREE_USED (decl) = 1; | |
1608 | if (sym->as) | |
1609 | decl = gfc_build_dummy_array_decl (sym, decl); | |
1610 | } | |
1611 | else | |
1612 | { | |
1613 | sprintf (name, "__result_%.20s", | |
1614 | IDENTIFIER_POINTER (DECL_NAME (current_function_decl))); | |
1615 | ||
1616 | decl = build_decl (VAR_DECL, get_identifier (name), | |
1617 | TREE_TYPE (TREE_TYPE (current_function_decl))); | |
1618 | ||
1619 | DECL_ARTIFICIAL (decl) = 1; | |
1620 | DECL_EXTERNAL (decl) = 0; | |
1621 | TREE_PUBLIC (decl) = 0; | |
1622 | TREE_USED (decl) = 1; | |
1623 | ||
1624 | layout_decl (decl, 0); | |
1625 | ||
1626 | gfc_add_decl_to_function (decl); | |
1627 | } | |
1628 | ||
1629 | current_fake_result_decl = decl; | |
1630 | ||
1631 | return decl; | |
1632 | } | |
1633 | ||
1634 | ||
1635 | /* Builds a function decl. The remaining parameters are the types of the | |
1636 | function arguments. Negative nargs indicates a varargs function. */ | |
1637 | ||
1638 | tree | |
1639 | gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...) | |
1640 | { | |
1641 | tree arglist; | |
1642 | tree argtype; | |
1643 | tree fntype; | |
1644 | tree fndecl; | |
1645 | va_list p; | |
1646 | int n; | |
1647 | ||
1648 | /* Library functions must be declared with global scope. */ | |
22d678e8 | 1649 | gcc_assert (current_function_decl == NULL_TREE); |
4ee9c684 | 1650 | |
1651 | va_start (p, nargs); | |
1652 | ||
1653 | ||
1654 | /* Create a list of the argument types. */ | |
1655 | for (arglist = NULL_TREE, n = abs (nargs); n > 0; n--) | |
1656 | { | |
1657 | argtype = va_arg (p, tree); | |
1658 | arglist = gfc_chainon_list (arglist, argtype); | |
1659 | } | |
1660 | ||
1661 | if (nargs >= 0) | |
1662 | { | |
1663 | /* Terminate the list. */ | |
1664 | arglist = gfc_chainon_list (arglist, void_type_node); | |
1665 | } | |
1666 | ||
1667 | /* Build the function type and decl. */ | |
1668 | fntype = build_function_type (rettype, arglist); | |
1669 | fndecl = build_decl (FUNCTION_DECL, name, fntype); | |
1670 | ||
1671 | /* Mark this decl as external. */ | |
1672 | DECL_EXTERNAL (fndecl) = 1; | |
1673 | TREE_PUBLIC (fndecl) = 1; | |
1674 | ||
1675 | va_end (p); | |
1676 | ||
1677 | pushdecl (fndecl); | |
1678 | ||
b2c4af5e | 1679 | rest_of_decl_compilation (fndecl, 1, 0); |
4ee9c684 | 1680 | |
1681 | return fndecl; | |
1682 | } | |
1683 | ||
1684 | static void | |
1685 | gfc_build_intrinsic_function_decls (void) | |
1686 | { | |
90ba9145 | 1687 | tree gfc_int4_type_node = gfc_get_int_type (4); |
1688 | tree gfc_int8_type_node = gfc_get_int_type (8); | |
1689 | tree gfc_logical4_type_node = gfc_get_logical_type (4); | |
1690 | tree gfc_real4_type_node = gfc_get_real_type (4); | |
1691 | tree gfc_real8_type_node = gfc_get_real_type (8); | |
1692 | tree gfc_complex4_type_node = gfc_get_complex_type (4); | |
1693 | tree gfc_complex8_type_node = gfc_get_complex_type (8); | |
1694 | ||
4ee9c684 | 1695 | /* String functions. */ |
1696 | gfor_fndecl_copy_string = | |
1697 | gfc_build_library_function_decl (get_identifier (PREFIX("copy_string")), | |
1698 | void_type_node, | |
1699 | 4, | |
9ad09405 | 1700 | gfc_charlen_type_node, pchar_type_node, |
1701 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 1702 | |
1703 | gfor_fndecl_compare_string = | |
1704 | gfc_build_library_function_decl (get_identifier (PREFIX("compare_string")), | |
1705 | gfc_int4_type_node, | |
1706 | 4, | |
9ad09405 | 1707 | gfc_charlen_type_node, pchar_type_node, |
1708 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 1709 | |
1710 | gfor_fndecl_concat_string = | |
1711 | gfc_build_library_function_decl (get_identifier (PREFIX("concat_string")), | |
1712 | void_type_node, | |
1713 | 6, | |
9ad09405 | 1714 | gfc_charlen_type_node, pchar_type_node, |
1715 | gfc_charlen_type_node, pchar_type_node, | |
1716 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 1717 | |
1718 | gfor_fndecl_string_len_trim = | |
1719 | gfc_build_library_function_decl (get_identifier (PREFIX("string_len_trim")), | |
1720 | gfc_int4_type_node, | |
9ad09405 | 1721 | 2, gfc_charlen_type_node, |
4ee9c684 | 1722 | pchar_type_node); |
1723 | ||
1724 | gfor_fndecl_string_index = | |
1725 | gfc_build_library_function_decl (get_identifier (PREFIX("string_index")), | |
1726 | gfc_int4_type_node, | |
9ad09405 | 1727 | 5, gfc_charlen_type_node, pchar_type_node, |
1728 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 1729 | gfc_logical4_type_node); |
1730 | ||
1731 | gfor_fndecl_string_scan = | |
1732 | gfc_build_library_function_decl (get_identifier (PREFIX("string_scan")), | |
1733 | gfc_int4_type_node, | |
9ad09405 | 1734 | 5, gfc_charlen_type_node, pchar_type_node, |
1735 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 1736 | gfc_logical4_type_node); |
1737 | ||
1738 | gfor_fndecl_string_verify = | |
1739 | gfc_build_library_function_decl (get_identifier (PREFIX("string_verify")), | |
1740 | gfc_int4_type_node, | |
9ad09405 | 1741 | 5, gfc_charlen_type_node, pchar_type_node, |
1742 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 1743 | gfc_logical4_type_node); |
1744 | ||
1745 | gfor_fndecl_string_trim = | |
1746 | gfc_build_library_function_decl (get_identifier (PREFIX("string_trim")), | |
1747 | void_type_node, | |
1748 | 4, | |
9ad09405 | 1749 | build_pointer_type (gfc_charlen_type_node), |
4ee9c684 | 1750 | ppvoid_type_node, |
9ad09405 | 1751 | gfc_charlen_type_node, |
4ee9c684 | 1752 | pchar_type_node); |
1753 | ||
1754 | gfor_fndecl_string_repeat = | |
1755 | gfc_build_library_function_decl (get_identifier (PREFIX("string_repeat")), | |
1756 | void_type_node, | |
1757 | 4, | |
1758 | pchar_type_node, | |
9ad09405 | 1759 | gfc_charlen_type_node, |
4ee9c684 | 1760 | pchar_type_node, |
1761 | gfc_int4_type_node); | |
1762 | ||
1763 | gfor_fndecl_adjustl = | |
1764 | gfc_build_library_function_decl (get_identifier (PREFIX("adjustl")), | |
1765 | void_type_node, | |
1766 | 3, | |
1767 | pchar_type_node, | |
9ad09405 | 1768 | gfc_charlen_type_node, pchar_type_node); |
4ee9c684 | 1769 | |
1770 | gfor_fndecl_adjustr = | |
1771 | gfc_build_library_function_decl (get_identifier (PREFIX("adjustr")), | |
1772 | void_type_node, | |
1773 | 3, | |
1774 | pchar_type_node, | |
9ad09405 | 1775 | gfc_charlen_type_node, pchar_type_node); |
4ee9c684 | 1776 | |
1777 | gfor_fndecl_si_kind = | |
1778 | gfc_build_library_function_decl (get_identifier ("selected_int_kind"), | |
1779 | gfc_int4_type_node, | |
1780 | 1, | |
1781 | pvoid_type_node); | |
1782 | ||
1783 | gfor_fndecl_sr_kind = | |
1784 | gfc_build_library_function_decl (get_identifier ("selected_real_kind"), | |
1785 | gfc_int4_type_node, | |
1786 | 2, pvoid_type_node, | |
1787 | pvoid_type_node); | |
1788 | ||
4ee9c684 | 1789 | /* Power functions. */ |
76834664 | 1790 | { |
1791 | tree type; | |
1792 | tree itype; | |
1793 | int kind; | |
1794 | int ikind; | |
1795 | static int kinds[2] = {4, 8}; | |
1796 | char name[PREFIX_LEN + 10]; /* _gfortran_pow_?n_?n */ | |
1797 | ||
1798 | for (ikind=0; ikind < 2; ikind++) | |
1799 | { | |
1800 | itype = gfc_get_int_type (kinds[ikind]); | |
1801 | for (kind = 0; kind < 2; kind ++) | |
1802 | { | |
1803 | type = gfc_get_int_type (kinds[kind]); | |
1804 | sprintf(name, PREFIX("pow_i%d_i%d"), kinds[kind], kinds[ikind]); | |
1805 | gfor_fndecl_math_powi[kind][ikind].integer = | |
1806 | gfc_build_library_function_decl (get_identifier (name), | |
1807 | type, 2, type, itype); | |
1808 | ||
1809 | type = gfc_get_real_type (kinds[kind]); | |
1810 | sprintf(name, PREFIX("pow_r%d_i%d"), kinds[kind], kinds[ikind]); | |
1811 | gfor_fndecl_math_powi[kind][ikind].real = | |
1812 | gfc_build_library_function_decl (get_identifier (name), | |
1813 | type, 2, type, itype); | |
1814 | ||
1815 | type = gfc_get_complex_type (kinds[kind]); | |
1816 | sprintf(name, PREFIX("pow_c%d_i%d"), kinds[kind], kinds[ikind]); | |
1817 | gfor_fndecl_math_powi[kind][ikind].cmplx = | |
1818 | gfc_build_library_function_decl (get_identifier (name), | |
1819 | type, 2, type, itype); | |
1820 | } | |
1821 | } | |
1822 | } | |
1823 | ||
4ee9c684 | 1824 | gfor_fndecl_math_cpowf = |
1825 | gfc_build_library_function_decl (get_identifier ("cpowf"), | |
1826 | gfc_complex4_type_node, | |
1827 | 1, gfc_complex4_type_node); | |
1828 | gfor_fndecl_math_cpow = | |
1829 | gfc_build_library_function_decl (get_identifier ("cpow"), | |
1830 | gfc_complex8_type_node, | |
1831 | 1, gfc_complex8_type_node); | |
4ee9c684 | 1832 | gfor_fndecl_math_ishftc4 = |
1833 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc4")), | |
1834 | gfc_int4_type_node, | |
1835 | 3, gfc_int4_type_node, | |
1836 | gfc_int4_type_node, gfc_int4_type_node); | |
1837 | gfor_fndecl_math_ishftc8 = | |
1838 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc8")), | |
1839 | gfc_int8_type_node, | |
1840 | 3, gfc_int8_type_node, | |
1841 | gfc_int8_type_node, gfc_int8_type_node); | |
1842 | gfor_fndecl_math_exponent4 = | |
1843 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r4")), | |
1844 | gfc_int4_type_node, | |
1845 | 1, gfc_real4_type_node); | |
1846 | gfor_fndecl_math_exponent8 = | |
1847 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r8")), | |
1848 | gfc_int4_type_node, | |
1849 | 1, gfc_real8_type_node); | |
1850 | ||
1851 | /* Other functions. */ | |
1852 | gfor_fndecl_size0 = | |
1853 | gfc_build_library_function_decl (get_identifier (PREFIX("size0")), | |
1854 | gfc_array_index_type, | |
1855 | 1, pvoid_type_node); | |
1856 | gfor_fndecl_size1 = | |
1857 | gfc_build_library_function_decl (get_identifier (PREFIX("size1")), | |
1858 | gfc_array_index_type, | |
1859 | 2, pvoid_type_node, | |
1860 | gfc_array_index_type); | |
9b057c29 | 1861 | |
1862 | gfor_fndecl_iargc = | |
1863 | gfc_build_library_function_decl (get_identifier (PREFIX ("iargc")), | |
1864 | gfc_int4_type_node, | |
1865 | 0); | |
4ee9c684 | 1866 | } |
1867 | ||
1868 | ||
1869 | /* Make prototypes for runtime library functions. */ | |
1870 | ||
1871 | void | |
1872 | gfc_build_builtin_function_decls (void) | |
1873 | { | |
90ba9145 | 1874 | tree gfc_int4_type_node = gfc_get_int_type (4); |
1875 | tree gfc_int8_type_node = gfc_get_int_type (8); | |
1876 | tree gfc_logical4_type_node = gfc_get_logical_type (4); | |
1877 | ||
4ee9c684 | 1878 | gfor_fndecl_internal_malloc = |
1879 | gfc_build_library_function_decl (get_identifier (PREFIX("internal_malloc")), | |
1880 | pvoid_type_node, 1, gfc_int4_type_node); | |
1881 | ||
1882 | gfor_fndecl_internal_malloc64 = | |
1883 | gfc_build_library_function_decl (get_identifier | |
1884 | (PREFIX("internal_malloc64")), | |
1885 | pvoid_type_node, 1, gfc_int8_type_node); | |
1886 | ||
1887 | gfor_fndecl_internal_free = | |
1888 | gfc_build_library_function_decl (get_identifier (PREFIX("internal_free")), | |
1889 | void_type_node, 1, pvoid_type_node); | |
1890 | ||
1891 | gfor_fndecl_allocate = | |
1892 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate")), | |
1893 | void_type_node, 2, ppvoid_type_node, | |
1894 | gfc_int4_type_node); | |
1895 | ||
1896 | gfor_fndecl_allocate64 = | |
1897 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate64")), | |
1898 | void_type_node, 2, ppvoid_type_node, | |
1899 | gfc_int8_type_node); | |
1900 | ||
1901 | gfor_fndecl_deallocate = | |
1902 | gfc_build_library_function_decl (get_identifier (PREFIX("deallocate")), | |
1903 | void_type_node, 1, ppvoid_type_node); | |
1904 | ||
1905 | gfor_fndecl_stop_numeric = | |
1906 | gfc_build_library_function_decl (get_identifier (PREFIX("stop_numeric")), | |
1907 | void_type_node, 1, gfc_int4_type_node); | |
1908 | ||
1909 | gfor_fndecl_stop_string = | |
1910 | gfc_build_library_function_decl (get_identifier (PREFIX("stop_string")), | |
1911 | void_type_node, 2, pchar_type_node, | |
1912 | gfc_int4_type_node); | |
1913 | ||
1914 | gfor_fndecl_pause_numeric = | |
1915 | gfc_build_library_function_decl (get_identifier (PREFIX("pause_numeric")), | |
1916 | void_type_node, 1, gfc_int4_type_node); | |
1917 | ||
1918 | gfor_fndecl_pause_string = | |
1919 | gfc_build_library_function_decl (get_identifier (PREFIX("pause_string")), | |
1920 | void_type_node, 2, pchar_type_node, | |
1921 | gfc_int4_type_node); | |
1922 | ||
1923 | gfor_fndecl_select_string = | |
1924 | gfc_build_library_function_decl (get_identifier (PREFIX("select_string")), | |
1925 | pvoid_type_node, 0); | |
1926 | ||
1927 | gfor_fndecl_runtime_error = | |
1928 | gfc_build_library_function_decl (get_identifier (PREFIX("runtime_error")), | |
1929 | void_type_node, | |
1930 | 3, | |
1931 | pchar_type_node, pchar_type_node, | |
1932 | gfc_int4_type_node); | |
1933 | ||
1934 | gfor_fndecl_in_pack = gfc_build_library_function_decl ( | |
1935 | get_identifier (PREFIX("internal_pack")), | |
1936 | pvoid_type_node, 1, pvoid_type_node); | |
1937 | ||
1938 | gfor_fndecl_in_unpack = gfc_build_library_function_decl ( | |
1939 | get_identifier (PREFIX("internal_unpack")), | |
1940 | pvoid_type_node, 1, pvoid_type_node); | |
1941 | ||
1942 | gfor_fndecl_associated = | |
1943 | gfc_build_library_function_decl ( | |
1944 | get_identifier (PREFIX("associated")), | |
1945 | gfc_logical4_type_node, | |
1946 | 2, | |
1947 | ppvoid_type_node, | |
1948 | ppvoid_type_node); | |
1949 | ||
1950 | gfc_build_intrinsic_function_decls (); | |
1951 | gfc_build_intrinsic_lib_fndecls (); | |
1952 | gfc_build_io_library_fndecls (); | |
1953 | } | |
1954 | ||
1955 | ||
231e961a | 1956 | /* Evaluate the length of dummy character variables. */ |
4ee9c684 | 1957 | |
1958 | static tree | |
1959 | gfc_trans_dummy_character (gfc_charlen * cl, tree fnbody) | |
1960 | { | |
1961 | stmtblock_t body; | |
1962 | ||
1963 | gfc_finish_decl (cl->backend_decl, NULL_TREE); | |
1964 | ||
1965 | gfc_start_block (&body); | |
1966 | ||
1967 | /* Evaluate the string length expression. */ | |
1968 | gfc_trans_init_string_length (cl, &body); | |
1969 | ||
1970 | gfc_add_expr_to_block (&body, fnbody); | |
1971 | return gfc_finish_block (&body); | |
1972 | } | |
1973 | ||
1974 | ||
1975 | /* Allocate and cleanup an automatic character variable. */ | |
1976 | ||
1977 | static tree | |
1978 | gfc_trans_auto_character_variable (gfc_symbol * sym, tree fnbody) | |
1979 | { | |
1980 | stmtblock_t body; | |
1981 | tree decl; | |
4ee9c684 | 1982 | tree tmp; |
1983 | ||
22d678e8 | 1984 | gcc_assert (sym->backend_decl); |
1985 | gcc_assert (sym->ts.cl && sym->ts.cl->length); | |
4ee9c684 | 1986 | |
1987 | gfc_start_block (&body); | |
1988 | ||
1989 | /* Evaluate the string length expression. */ | |
1990 | gfc_trans_init_string_length (sym->ts.cl, &body); | |
1991 | ||
1992 | decl = sym->backend_decl; | |
1993 | ||
afcf285e | 1994 | /* Emit a DECL_EXPR for this variable, which will cause the |
4b3a701c | 1995 | gimplifier to allocate storage, and all that good stuff. */ |
ed52ef8b | 1996 | tmp = build1 (DECL_EXPR, TREE_TYPE (decl), decl); |
4ee9c684 | 1997 | gfc_add_expr_to_block (&body, tmp); |
afcf285e | 1998 | |
4ee9c684 | 1999 | gfc_add_expr_to_block (&body, fnbody); |
2000 | return gfc_finish_block (&body); | |
2001 | } | |
2002 | ||
2003 | ||
2004 | /* Generate function entry and exit code, and add it to the function body. | |
2005 | This includes: | |
f888a3fb | 2006 | Allocation and initialization of array variables. |
4ee9c684 | 2007 | Allocation of character string variables. |
2008 | Initialization and possibly repacking of dummy arrays. */ | |
2009 | ||
2010 | static tree | |
2011 | gfc_trans_deferred_vars (gfc_symbol * proc_sym, tree fnbody) | |
2012 | { | |
2013 | locus loc; | |
2014 | gfc_symbol *sym; | |
2015 | ||
2016 | /* Deal with implicit return variables. Explicit return variables will | |
2017 | already have been added. */ | |
2018 | if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym) | |
2019 | { | |
2020 | if (!current_fake_result_decl) | |
2021 | { | |
c6871095 | 2022 | gfc_entry_list *el = NULL; |
2023 | if (proc_sym->attr.entry_master) | |
2024 | { | |
2025 | for (el = proc_sym->ns->entries; el; el = el->next) | |
2026 | if (el->sym != el->sym->result) | |
2027 | break; | |
2028 | } | |
2029 | if (el == NULL) | |
2030 | warning (0, "Function does not return a value"); | |
4ee9c684 | 2031 | } |
c6871095 | 2032 | else if (proc_sym->as) |
4ee9c684 | 2033 | { |
2034 | fnbody = gfc_trans_dummy_array_bias (proc_sym, | |
2035 | current_fake_result_decl, | |
2036 | fnbody); | |
2037 | } | |
2038 | else if (proc_sym->ts.type == BT_CHARACTER) | |
2039 | { | |
2040 | if (TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL) | |
2041 | fnbody = gfc_trans_dummy_character (proc_sym->ts.cl, fnbody); | |
2042 | } | |
2043 | else | |
bdaed7d2 | 2044 | gcc_assert (gfc_option.flag_f2c |
2045 | && proc_sym->ts.type == BT_COMPLEX); | |
4ee9c684 | 2046 | } |
2047 | ||
2048 | for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink) | |
2049 | { | |
2050 | if (sym->attr.dimension) | |
2051 | { | |
2052 | switch (sym->as->type) | |
2053 | { | |
2054 | case AS_EXPLICIT: | |
2055 | if (sym->attr.dummy || sym->attr.result) | |
2056 | fnbody = | |
2057 | gfc_trans_dummy_array_bias (sym, sym->backend_decl, fnbody); | |
2058 | else if (sym->attr.pointer || sym->attr.allocatable) | |
2059 | { | |
2060 | if (TREE_STATIC (sym->backend_decl)) | |
2061 | gfc_trans_static_array_pointer (sym); | |
2062 | else | |
2063 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
2064 | } | |
2065 | else | |
2066 | { | |
2067 | gfc_get_backend_locus (&loc); | |
2068 | gfc_set_backend_locus (&sym->declared_at); | |
2069 | fnbody = gfc_trans_auto_array_allocation (sym->backend_decl, | |
2070 | sym, fnbody); | |
2071 | gfc_set_backend_locus (&loc); | |
2072 | } | |
2073 | break; | |
2074 | ||
2075 | case AS_ASSUMED_SIZE: | |
2076 | /* Must be a dummy parameter. */ | |
22d678e8 | 2077 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 2078 | |
2079 | /* We should always pass assumed size arrays the g77 way. */ | |
4ee9c684 | 2080 | fnbody = gfc_trans_g77_array (sym, fnbody); |
2081 | break; | |
2082 | ||
2083 | case AS_ASSUMED_SHAPE: | |
2084 | /* Must be a dummy parameter. */ | |
22d678e8 | 2085 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 2086 | |
2087 | fnbody = gfc_trans_dummy_array_bias (sym, sym->backend_decl, | |
2088 | fnbody); | |
2089 | break; | |
2090 | ||
2091 | case AS_DEFERRED: | |
2092 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
2093 | break; | |
2094 | ||
2095 | default: | |
22d678e8 | 2096 | gcc_unreachable (); |
4ee9c684 | 2097 | } |
2098 | } | |
2099 | else if (sym->ts.type == BT_CHARACTER) | |
2100 | { | |
2101 | gfc_get_backend_locus (&loc); | |
2102 | gfc_set_backend_locus (&sym->declared_at); | |
2103 | if (sym->attr.dummy || sym->attr.result) | |
2104 | fnbody = gfc_trans_dummy_character (sym->ts.cl, fnbody); | |
2105 | else | |
2106 | fnbody = gfc_trans_auto_character_variable (sym, fnbody); | |
2107 | gfc_set_backend_locus (&loc); | |
2108 | } | |
2109 | else | |
22d678e8 | 2110 | gcc_unreachable (); |
4ee9c684 | 2111 | } |
2112 | ||
2113 | return fnbody; | |
2114 | } | |
2115 | ||
2116 | ||
2117 | /* Output an initialized decl for a module variable. */ | |
2118 | ||
2119 | static void | |
2120 | gfc_create_module_variable (gfc_symbol * sym) | |
2121 | { | |
2122 | tree decl; | |
4ee9c684 | 2123 | |
2124 | /* Only output symbols from this module. */ | |
2125 | if (sym->ns != module_namespace) | |
2126 | { | |
2127 | /* I don't think this should ever happen. */ | |
2128 | internal_error ("module symbol %s in wrong namespace", sym->name); | |
2129 | } | |
2130 | ||
7b3423b9 | 2131 | /* Only output variables and array valued parameters. */ |
4ee9c684 | 2132 | if (sym->attr.flavor != FL_VARIABLE |
2133 | && (sym->attr.flavor != FL_PARAMETER || sym->attr.dimension == 0)) | |
2134 | return; | |
2135 | ||
d43a7f7f | 2136 | /* Don't generate variables from other modules. Variables from |
2137 | COMMONs will already have been generated. */ | |
2138 | if (sym->attr.use_assoc || sym->attr.in_common) | |
4ee9c684 | 2139 | return; |
2140 | ||
2141 | if (sym->backend_decl) | |
2142 | internal_error ("backend decl for module variable %s already exists", | |
2143 | sym->name); | |
2144 | ||
2145 | /* We always want module variables to be created. */ | |
2146 | sym->attr.referenced = 1; | |
2147 | /* Create the decl. */ | |
2148 | decl = gfc_get_symbol_decl (sym); | |
2149 | ||
4ee9c684 | 2150 | /* Create the variable. */ |
2151 | pushdecl (decl); | |
b2c4af5e | 2152 | rest_of_decl_compilation (decl, 1, 0); |
4ee9c684 | 2153 | |
2154 | /* Also add length of strings. */ | |
2155 | if (sym->ts.type == BT_CHARACTER) | |
2156 | { | |
2157 | tree length; | |
2158 | ||
2159 | length = sym->ts.cl->backend_decl; | |
2160 | if (!INTEGER_CST_P (length)) | |
2161 | { | |
2162 | pushdecl (length); | |
b2c4af5e | 2163 | rest_of_decl_compilation (length, 1, 0); |
4ee9c684 | 2164 | } |
2165 | } | |
2166 | } | |
2167 | ||
2168 | ||
2169 | /* Generate all the required code for module variables. */ | |
2170 | ||
2171 | void | |
2172 | gfc_generate_module_vars (gfc_namespace * ns) | |
2173 | { | |
2174 | module_namespace = ns; | |
2175 | ||
dfc222eb | 2176 | /* Check if the frontend left the namespace in a reasonable state. */ |
22d678e8 | 2177 | gcc_assert (ns->proc_name && !ns->proc_name->tlink); |
4ee9c684 | 2178 | |
d43a7f7f | 2179 | /* Generate COMMON blocks. */ |
2180 | gfc_trans_common (ns); | |
2181 | ||
dfc222eb | 2182 | /* Create decls for all the module variables. */ |
4ee9c684 | 2183 | gfc_traverse_ns (ns, gfc_create_module_variable); |
2184 | } | |
2185 | ||
2186 | static void | |
2187 | gfc_generate_contained_functions (gfc_namespace * parent) | |
2188 | { | |
2189 | gfc_namespace *ns; | |
2190 | ||
2191 | /* We create all the prototypes before generating any code. */ | |
2192 | for (ns = parent->contained; ns; ns = ns->sibling) | |
2193 | { | |
2194 | /* Skip namespaces from used modules. */ | |
2195 | if (ns->parent != parent) | |
2196 | continue; | |
2197 | ||
1b716045 | 2198 | gfc_create_function_decl (ns); |
4ee9c684 | 2199 | } |
2200 | ||
2201 | for (ns = parent->contained; ns; ns = ns->sibling) | |
2202 | { | |
2203 | /* Skip namespaces from used modules. */ | |
2204 | if (ns->parent != parent) | |
2205 | continue; | |
2206 | ||
2207 | gfc_generate_function_code (ns); | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | ||
2212 | /* Generate decls for all local variables. We do this to ensure correct | |
2213 | handling of expressions which only appear in the specification of | |
2214 | other functions. */ | |
2215 | ||
2216 | static void | |
2217 | generate_local_decl (gfc_symbol * sym) | |
2218 | { | |
2219 | if (sym->attr.flavor == FL_VARIABLE) | |
2220 | { | |
4ee9c684 | 2221 | if (sym->attr.referenced) |
2222 | gfc_get_symbol_decl (sym); | |
14a3addc | 2223 | else if (sym->attr.dummy && warn_unused_parameter) |
c3ceba8e | 2224 | warning (0, "unused parameter %qs", sym->name); |
f888a3fb | 2225 | /* Warn for unused variables, but not if they're inside a common |
14a3addc | 2226 | block or are use-associated. */ |
36609028 | 2227 | else if (warn_unused_variable |
2228 | && !(sym->attr.in_common || sym->attr.use_assoc)) | |
c3ceba8e | 2229 | warning (0, "unused variable %qs", sym->name); |
4ee9c684 | 2230 | } |
2231 | } | |
2232 | ||
2233 | static void | |
2234 | generate_local_vars (gfc_namespace * ns) | |
2235 | { | |
2236 | gfc_traverse_ns (ns, generate_local_decl); | |
2237 | } | |
2238 | ||
2239 | ||
1b716045 | 2240 | /* Generate a switch statement to jump to the correct entry point. Also |
2241 | creates the label decls for the entry points. */ | |
4ee9c684 | 2242 | |
1b716045 | 2243 | static tree |
2244 | gfc_trans_entry_master_switch (gfc_entry_list * el) | |
4ee9c684 | 2245 | { |
1b716045 | 2246 | stmtblock_t block; |
2247 | tree label; | |
2248 | tree tmp; | |
2249 | tree val; | |
4ee9c684 | 2250 | |
1b716045 | 2251 | gfc_init_block (&block); |
2252 | for (; el; el = el->next) | |
2253 | { | |
2254 | /* Add the case label. */ | |
b797d6d3 | 2255 | label = gfc_build_label_decl (NULL_TREE); |
7016c612 | 2256 | val = build_int_cst (gfc_array_index_type, el->id); |
ed52ef8b | 2257 | tmp = build3_v (CASE_LABEL_EXPR, val, NULL_TREE, label); |
1b716045 | 2258 | gfc_add_expr_to_block (&block, tmp); |
2259 | ||
2260 | /* And jump to the actual entry point. */ | |
2261 | label = gfc_build_label_decl (NULL_TREE); | |
1b716045 | 2262 | tmp = build1_v (GOTO_EXPR, label); |
2263 | gfc_add_expr_to_block (&block, tmp); | |
2264 | ||
2265 | /* Save the label decl. */ | |
2266 | el->label = label; | |
2267 | } | |
2268 | tmp = gfc_finish_block (&block); | |
2269 | /* The first argument selects the entry point. */ | |
2270 | val = DECL_ARGUMENTS (current_function_decl); | |
ed52ef8b | 2271 | tmp = build3_v (SWITCH_EXPR, val, tmp, NULL_TREE); |
1b716045 | 2272 | return tmp; |
4ee9c684 | 2273 | } |
2274 | ||
6374121b | 2275 | |
4ee9c684 | 2276 | /* Generate code for a function. */ |
2277 | ||
2278 | void | |
2279 | gfc_generate_function_code (gfc_namespace * ns) | |
2280 | { | |
2281 | tree fndecl; | |
2282 | tree old_context; | |
2283 | tree decl; | |
2284 | tree tmp; | |
2285 | stmtblock_t block; | |
2286 | stmtblock_t body; | |
2287 | tree result; | |
2288 | gfc_symbol *sym; | |
2289 | ||
2290 | sym = ns->proc_name; | |
1b716045 | 2291 | |
4ee9c684 | 2292 | /* Check that the frontend isn't still using this. */ |
22d678e8 | 2293 | gcc_assert (sym->tlink == NULL); |
4ee9c684 | 2294 | sym->tlink = sym; |
2295 | ||
2296 | /* Create the declaration for functions with global scope. */ | |
2297 | if (!sym->backend_decl) | |
1b716045 | 2298 | gfc_create_function_decl (ns); |
4ee9c684 | 2299 | |
2300 | fndecl = sym->backend_decl; | |
2301 | old_context = current_function_decl; | |
2302 | ||
2303 | if (old_context) | |
2304 | { | |
2305 | push_function_context (); | |
2306 | saved_parent_function_decls = saved_function_decls; | |
2307 | saved_function_decls = NULL_TREE; | |
2308 | } | |
2309 | ||
1b716045 | 2310 | trans_function_start (sym); |
4ee9c684 | 2311 | |
2312 | /* Will be created as needed. */ | |
2313 | current_fake_result_decl = NULL_TREE; | |
2314 | ||
4ee9c684 | 2315 | gfc_start_block (&block); |
2316 | ||
2317 | gfc_generate_contained_functions (ns); | |
2318 | ||
c6871095 | 2319 | if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER) |
2320 | { | |
2321 | /* Copy length backend_decls to all entry point result | |
2322 | symbols. */ | |
2323 | gfc_entry_list *el; | |
2324 | tree backend_decl; | |
2325 | ||
2326 | gfc_conv_const_charlen (ns->proc_name->ts.cl); | |
2327 | backend_decl = ns->proc_name->result->ts.cl->backend_decl; | |
2328 | for (el = ns->entries; el; el = el->next) | |
2329 | el->sym->result->ts.cl->backend_decl = backend_decl; | |
2330 | } | |
2331 | ||
4ee9c684 | 2332 | /* Translate COMMON blocks. */ |
2333 | gfc_trans_common (ns); | |
2334 | ||
2335 | generate_local_vars (ns); | |
2336 | ||
2337 | current_function_return_label = NULL; | |
2338 | ||
2339 | /* Now generate the code for the body of this function. */ | |
2340 | gfc_init_block (&body); | |
2341 | ||
2342 | if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node | |
2343 | && sym->attr.subroutine) | |
2344 | { | |
2345 | tree alternate_return; | |
2346 | alternate_return = gfc_get_fake_result_decl (sym); | |
2347 | gfc_add_modify_expr (&body, alternate_return, integer_zero_node); | |
2348 | } | |
2349 | ||
1b716045 | 2350 | if (ns->entries) |
2351 | { | |
2352 | /* Jump to the correct entry point. */ | |
2353 | tmp = gfc_trans_entry_master_switch (ns->entries); | |
2354 | gfc_add_expr_to_block (&body, tmp); | |
2355 | } | |
2356 | ||
4ee9c684 | 2357 | tmp = gfc_trans_code (ns->code); |
2358 | gfc_add_expr_to_block (&body, tmp); | |
2359 | ||
2360 | /* Add a return label if needed. */ | |
2361 | if (current_function_return_label) | |
2362 | { | |
2363 | tmp = build1_v (LABEL_EXPR, current_function_return_label); | |
2364 | gfc_add_expr_to_block (&body, tmp); | |
2365 | } | |
2366 | ||
2367 | tmp = gfc_finish_block (&body); | |
2368 | /* Add code to create and cleanup arrays. */ | |
2369 | tmp = gfc_trans_deferred_vars (sym, tmp); | |
2370 | gfc_add_expr_to_block (&block, tmp); | |
2371 | ||
2372 | if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node) | |
2373 | { | |
14a3addc | 2374 | if (sym->attr.subroutine || sym == sym->result) |
4ee9c684 | 2375 | { |
2376 | result = current_fake_result_decl; | |
2377 | current_fake_result_decl = NULL_TREE; | |
2378 | } | |
2379 | else | |
2380 | result = sym->result->backend_decl; | |
2381 | ||
2382 | if (result == NULL_TREE) | |
c3ceba8e | 2383 | warning (0, "Function return value not set"); |
4ee9c684 | 2384 | else |
2385 | { | |
f888a3fb | 2386 | /* Set the return value to the dummy result variable. */ |
ed52ef8b | 2387 | tmp = build2 (MODIFY_EXPR, TREE_TYPE (result), |
2388 | DECL_RESULT (fndecl), result); | |
2389 | tmp = build1_v (RETURN_EXPR, tmp); | |
4ee9c684 | 2390 | gfc_add_expr_to_block (&block, tmp); |
2391 | } | |
2392 | } | |
2393 | ||
2394 | /* Add all the decls we created during processing. */ | |
2395 | decl = saved_function_decls; | |
2396 | while (decl) | |
2397 | { | |
2398 | tree next; | |
2399 | ||
2400 | next = TREE_CHAIN (decl); | |
2401 | TREE_CHAIN (decl) = NULL_TREE; | |
2402 | pushdecl (decl); | |
2403 | decl = next; | |
2404 | } | |
2405 | saved_function_decls = NULL_TREE; | |
2406 | ||
2407 | DECL_SAVED_TREE (fndecl) = gfc_finish_block (&block); | |
2408 | ||
2409 | /* Finish off this function and send it for code generation. */ | |
2410 | poplevel (1, 0, 1); | |
2411 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; | |
2412 | ||
2413 | /* Output the GENERIC tree. */ | |
2414 | dump_function (TDI_original, fndecl); | |
2415 | ||
2416 | /* Store the end of the function, so that we get good line number | |
2417 | info for the epilogue. */ | |
2418 | cfun->function_end_locus = input_location; | |
2419 | ||
2420 | /* We're leaving the context of this function, so zap cfun. | |
2421 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in | |
2422 | tree_rest_of_compilation. */ | |
2423 | cfun = NULL; | |
2424 | ||
2425 | if (old_context) | |
2426 | { | |
2427 | pop_function_context (); | |
2428 | saved_function_decls = saved_parent_function_decls; | |
2429 | } | |
2430 | current_function_decl = old_context; | |
2431 | ||
2432 | if (decl_function_context (fndecl)) | |
6374121b | 2433 | /* Register this function with cgraph just far enough to get it |
2434 | added to our parent's nested function list. */ | |
2435 | (void) cgraph_node (fndecl); | |
4ee9c684 | 2436 | else |
2437 | { | |
6374121b | 2438 | gfc_gimplify_function (fndecl); |
9d95b2b0 | 2439 | cgraph_finalize_function (fndecl, false); |
4ee9c684 | 2440 | } |
2441 | } | |
2442 | ||
4ee9c684 | 2443 | void |
2444 | gfc_generate_constructors (void) | |
2445 | { | |
22d678e8 | 2446 | gcc_assert (gfc_static_ctors == NULL_TREE); |
4ee9c684 | 2447 | #if 0 |
2448 | tree fnname; | |
2449 | tree type; | |
2450 | tree fndecl; | |
2451 | tree decl; | |
2452 | tree tmp; | |
2453 | ||
2454 | if (gfc_static_ctors == NULL_TREE) | |
2455 | return; | |
2456 | ||
2457 | fnname = get_file_function_name ('I'); | |
2458 | type = build_function_type (void_type_node, | |
2459 | gfc_chainon_list (NULL_TREE, void_type_node)); | |
2460 | ||
2461 | fndecl = build_decl (FUNCTION_DECL, fnname, type); | |
2462 | TREE_PUBLIC (fndecl) = 1; | |
2463 | ||
2464 | decl = build_decl (RESULT_DECL, NULL_TREE, void_type_node); | |
540edea7 | 2465 | DECL_ARTIFICIAL (decl) = 1; |
2466 | DECL_IGNORED_P (decl) = 1; | |
4ee9c684 | 2467 | DECL_CONTEXT (decl) = fndecl; |
2468 | DECL_RESULT (fndecl) = decl; | |
2469 | ||
2470 | pushdecl (fndecl); | |
2471 | ||
2472 | current_function_decl = fndecl; | |
2473 | ||
b2c4af5e | 2474 | rest_of_decl_compilation (fndecl, 1, 0); |
4ee9c684 | 2475 | |
b2c4af5e | 2476 | make_decl_rtl (fndecl); |
4ee9c684 | 2477 | |
b31f705b | 2478 | init_function_start (fndecl); |
4ee9c684 | 2479 | |
4ee9c684 | 2480 | pushlevel (0); |
2481 | ||
2482 | for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors)) | |
2483 | { | |
2484 | tmp = | |
2485 | gfc_build_function_call (TREE_VALUE (gfc_static_ctors), NULL_TREE); | |
2486 | DECL_SAVED_TREE (fndecl) = build_stmt (EXPR_STMT, tmp); | |
2487 | } | |
2488 | ||
2489 | poplevel (1, 0, 1); | |
2490 | ||
2491 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; | |
2492 | ||
2493 | free_after_parsing (cfun); | |
2494 | free_after_compilation (cfun); | |
2495 | ||
6148a911 | 2496 | tree_rest_of_compilation (fndecl); |
4ee9c684 | 2497 | |
2498 | current_function_decl = NULL_TREE; | |
2499 | #endif | |
2500 | } | |
2501 | ||
9ec7c303 | 2502 | /* Translates a BLOCK DATA program unit. This means emitting the |
2503 | commons contained therein plus their initializations. We also emit | |
2504 | a globally visible symbol to make sure that each BLOCK DATA program | |
2505 | unit remains unique. */ | |
2506 | ||
2507 | void | |
2508 | gfc_generate_block_data (gfc_namespace * ns) | |
2509 | { | |
2510 | tree decl; | |
2511 | tree id; | |
2512 | ||
b31f705b | 2513 | /* Tell the backend the source location of the block data. */ |
2514 | if (ns->proc_name) | |
2515 | gfc_set_backend_locus (&ns->proc_name->declared_at); | |
2516 | else | |
2517 | gfc_set_backend_locus (&gfc_current_locus); | |
2518 | ||
2519 | /* Process the DATA statements. */ | |
9ec7c303 | 2520 | gfc_trans_common (ns); |
2521 | ||
b31f705b | 2522 | /* Create a global symbol with the mane of the block data. This is to |
2523 | generate linker errors if the same name is used twice. It is never | |
2524 | really used. */ | |
9ec7c303 | 2525 | if (ns->proc_name) |
2526 | id = gfc_sym_mangled_function_id (ns->proc_name); | |
2527 | else | |
2528 | id = get_identifier ("__BLOCK_DATA__"); | |
2529 | ||
2530 | decl = build_decl (VAR_DECL, id, gfc_array_index_type); | |
2531 | TREE_PUBLIC (decl) = 1; | |
2532 | TREE_STATIC (decl) = 1; | |
2533 | ||
2534 | pushdecl (decl); | |
2535 | rest_of_decl_compilation (decl, 1, 0); | |
2536 | } | |
2537 | ||
4ee9c684 | 2538 | #include "gt-fortran-trans-decl.h" |