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4ee9c684 | 1 | /* Backend function setup |
c173930f | 2 | Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, |
3 | Inc. | |
4ee9c684 | 4 | Contributed by Paul Brook |
5 | ||
c84b470d | 6 | This file is part of GCC. |
4ee9c684 | 7 | |
c84b470d | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
4ee9c684 | 12 | |
c84b470d | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
4ee9c684 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
c84b470d | 19 | along with GCC; see the file COPYING. If not, write to the Free |
30d4ffea | 20 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
4ee9c684 | 22 | |
23 | /* trans-decl.c -- Handling of backend function and variable decls, etc */ | |
24 | ||
25 | #include "config.h" | |
26 | #include "system.h" | |
27 | #include "coretypes.h" | |
28 | #include "tree.h" | |
29 | #include "tree-dump.h" | |
88bce636 | 30 | #include "tree-gimple.h" |
4ee9c684 | 31 | #include "ggc.h" |
32 | #include "toplev.h" | |
33 | #include "tm.h" | |
0290e11b | 34 | #include "rtl.h" |
4ee9c684 | 35 | #include "target.h" |
36 | #include "function.h" | |
4ee9c684 | 37 | #include "flags.h" |
38 | #include "cgraph.h" | |
4ee9c684 | 39 | #include "gfortran.h" |
40 | #include "trans.h" | |
41 | #include "trans-types.h" | |
42 | #include "trans-array.h" | |
43 | #include "trans-const.h" | |
44 | /* Only for gfc_trans_code. Shouldn't need to include this. */ | |
45 | #include "trans-stmt.h" | |
46 | ||
47 | #define MAX_LABEL_VALUE 99999 | |
48 | ||
49 | ||
50 | /* Holds the result of the function if no result variable specified. */ | |
51 | ||
52 | static GTY(()) tree current_fake_result_decl; | |
c750cc52 | 53 | static GTY(()) tree parent_fake_result_decl; |
4ee9c684 | 54 | |
55 | static GTY(()) tree current_function_return_label; | |
56 | ||
57 | ||
58 | /* Holds the variable DECLs for the current function. */ | |
59 | ||
d4163395 | 60 | static GTY(()) tree saved_function_decls; |
61 | static GTY(()) tree saved_parent_function_decls; | |
4ee9c684 | 62 | |
63 | ||
64 | /* The namespace of the module we're currently generating. Only used while | |
65 | outputting decls for module variables. Do not rely on this being set. */ | |
66 | ||
67 | static gfc_namespace *module_namespace; | |
68 | ||
69 | ||
70 | /* List of static constructor functions. */ | |
71 | ||
72 | tree gfc_static_ctors; | |
73 | ||
74 | ||
75 | /* Function declarations for builtin library functions. */ | |
76 | ||
77 | tree gfor_fndecl_internal_malloc; | |
78 | tree gfor_fndecl_internal_malloc64; | |
9e1839e2 | 79 | tree gfor_fndecl_internal_realloc; |
80 | tree gfor_fndecl_internal_realloc64; | |
4ee9c684 | 81 | tree gfor_fndecl_internal_free; |
82 | tree gfor_fndecl_allocate; | |
83 | tree gfor_fndecl_allocate64; | |
8a92488f | 84 | tree gfor_fndecl_allocate_array; |
85 | tree gfor_fndecl_allocate64_array; | |
4ee9c684 | 86 | tree gfor_fndecl_deallocate; |
87 | tree gfor_fndecl_pause_numeric; | |
88 | tree gfor_fndecl_pause_string; | |
89 | tree gfor_fndecl_stop_numeric; | |
90 | tree gfor_fndecl_stop_string; | |
91 | tree gfor_fndecl_select_string; | |
92 | tree gfor_fndecl_runtime_error; | |
8c84a5de | 93 | tree gfor_fndecl_set_fpe; |
64fc3c4c | 94 | tree gfor_fndecl_set_std; |
15774a8b | 95 | tree gfor_fndecl_set_convert; |
f23886ab | 96 | tree gfor_fndecl_set_record_marker; |
b902b078 | 97 | tree gfor_fndecl_ctime; |
98 | tree gfor_fndecl_fdate; | |
dbc97b88 | 99 | tree gfor_fndecl_ttynam; |
4ee9c684 | 100 | tree gfor_fndecl_in_pack; |
101 | tree gfor_fndecl_in_unpack; | |
102 | tree gfor_fndecl_associated; | |
103 | ||
104 | ||
105 | /* Math functions. Many other math functions are handled in | |
106 | trans-intrinsic.c. */ | |
107 | ||
920e54ef | 108 | gfc_powdecl_list gfor_fndecl_math_powi[4][3]; |
4ee9c684 | 109 | tree gfor_fndecl_math_cpowf; |
110 | tree gfor_fndecl_math_cpow; | |
920e54ef | 111 | tree gfor_fndecl_math_cpowl10; |
112 | tree gfor_fndecl_math_cpowl16; | |
4ee9c684 | 113 | tree gfor_fndecl_math_ishftc4; |
114 | tree gfor_fndecl_math_ishftc8; | |
920e54ef | 115 | tree gfor_fndecl_math_ishftc16; |
4ee9c684 | 116 | tree gfor_fndecl_math_exponent4; |
117 | tree gfor_fndecl_math_exponent8; | |
920e54ef | 118 | tree gfor_fndecl_math_exponent10; |
119 | tree gfor_fndecl_math_exponent16; | |
4ee9c684 | 120 | |
121 | ||
122 | /* String functions. */ | |
123 | ||
4ee9c684 | 124 | tree gfor_fndecl_compare_string; |
125 | tree gfor_fndecl_concat_string; | |
126 | tree gfor_fndecl_string_len_trim; | |
127 | tree gfor_fndecl_string_index; | |
128 | tree gfor_fndecl_string_scan; | |
129 | tree gfor_fndecl_string_verify; | |
130 | tree gfor_fndecl_string_trim; | |
131 | tree gfor_fndecl_string_repeat; | |
132 | tree gfor_fndecl_adjustl; | |
133 | tree gfor_fndecl_adjustr; | |
134 | ||
135 | ||
136 | /* Other misc. runtime library functions. */ | |
137 | ||
138 | tree gfor_fndecl_size0; | |
139 | tree gfor_fndecl_size1; | |
9b057c29 | 140 | tree gfor_fndecl_iargc; |
4ee9c684 | 141 | |
142 | /* Intrinsic functions implemented in FORTRAN. */ | |
143 | tree gfor_fndecl_si_kind; | |
144 | tree gfor_fndecl_sr_kind; | |
145 | ||
4e8e57b0 | 146 | /* BLAS gemm functions. */ |
147 | tree gfor_fndecl_sgemm; | |
148 | tree gfor_fndecl_dgemm; | |
149 | tree gfor_fndecl_cgemm; | |
150 | tree gfor_fndecl_zgemm; | |
151 | ||
4ee9c684 | 152 | |
153 | static void | |
154 | gfc_add_decl_to_parent_function (tree decl) | |
155 | { | |
22d678e8 | 156 | gcc_assert (decl); |
4ee9c684 | 157 | DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl); |
158 | DECL_NONLOCAL (decl) = 1; | |
159 | TREE_CHAIN (decl) = saved_parent_function_decls; | |
160 | saved_parent_function_decls = decl; | |
161 | } | |
162 | ||
163 | void | |
164 | gfc_add_decl_to_function (tree decl) | |
165 | { | |
22d678e8 | 166 | gcc_assert (decl); |
4ee9c684 | 167 | TREE_USED (decl) = 1; |
168 | DECL_CONTEXT (decl) = current_function_decl; | |
169 | TREE_CHAIN (decl) = saved_function_decls; | |
170 | saved_function_decls = decl; | |
171 | } | |
172 | ||
173 | ||
b797d6d3 | 174 | /* Build a backend label declaration. Set TREE_USED for named labels. |
175 | The context of the label is always the current_function_decl. All | |
176 | labels are marked artificial. */ | |
4ee9c684 | 177 | |
178 | tree | |
179 | gfc_build_label_decl (tree label_id) | |
180 | { | |
181 | /* 2^32 temporaries should be enough. */ | |
182 | static unsigned int tmp_num = 1; | |
183 | tree label_decl; | |
184 | char *label_name; | |
185 | ||
186 | if (label_id == NULL_TREE) | |
187 | { | |
188 | /* Build an internal label name. */ | |
189 | ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++); | |
190 | label_id = get_identifier (label_name); | |
191 | } | |
192 | else | |
193 | label_name = NULL; | |
194 | ||
195 | /* Build the LABEL_DECL node. Labels have no type. */ | |
196 | label_decl = build_decl (LABEL_DECL, label_id, void_type_node); | |
197 | DECL_CONTEXT (label_decl) = current_function_decl; | |
198 | DECL_MODE (label_decl) = VOIDmode; | |
199 | ||
b797d6d3 | 200 | /* We always define the label as used, even if the original source |
201 | file never references the label. We don't want all kinds of | |
202 | spurious warnings for old-style Fortran code with too many | |
203 | labels. */ | |
204 | TREE_USED (label_decl) = 1; | |
4ee9c684 | 205 | |
b797d6d3 | 206 | DECL_ARTIFICIAL (label_decl) = 1; |
4ee9c684 | 207 | return label_decl; |
208 | } | |
209 | ||
210 | ||
211 | /* Returns the return label for the current function. */ | |
212 | ||
213 | tree | |
214 | gfc_get_return_label (void) | |
215 | { | |
216 | char name[GFC_MAX_SYMBOL_LEN + 10]; | |
217 | ||
218 | if (current_function_return_label) | |
219 | return current_function_return_label; | |
220 | ||
221 | sprintf (name, "__return_%s", | |
222 | IDENTIFIER_POINTER (DECL_NAME (current_function_decl))); | |
223 | ||
224 | current_function_return_label = | |
225 | gfc_build_label_decl (get_identifier (name)); | |
226 | ||
227 | DECL_ARTIFICIAL (current_function_return_label) = 1; | |
228 | ||
229 | return current_function_return_label; | |
230 | } | |
231 | ||
232 | ||
b31f705b | 233 | /* Set the backend source location of a decl. */ |
234 | ||
235 | void | |
236 | gfc_set_decl_location (tree decl, locus * loc) | |
237 | { | |
238 | #ifdef USE_MAPPED_LOCATION | |
239 | DECL_SOURCE_LOCATION (decl) = loc->lb->location; | |
240 | #else | |
241 | DECL_SOURCE_LINE (decl) = loc->lb->linenum; | |
242 | DECL_SOURCE_FILE (decl) = loc->lb->file->filename; | |
243 | #endif | |
244 | } | |
245 | ||
246 | ||
4ee9c684 | 247 | /* Return the backend label declaration for a given label structure, |
248 | or create it if it doesn't exist yet. */ | |
249 | ||
250 | tree | |
251 | gfc_get_label_decl (gfc_st_label * lp) | |
252 | { | |
4ee9c684 | 253 | if (lp->backend_decl) |
254 | return lp->backend_decl; | |
255 | else | |
256 | { | |
257 | char label_name[GFC_MAX_SYMBOL_LEN + 1]; | |
258 | tree label_decl; | |
259 | ||
260 | /* Validate the label declaration from the front end. */ | |
22d678e8 | 261 | gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE); |
4ee9c684 | 262 | |
263 | /* Build a mangled name for the label. */ | |
264 | sprintf (label_name, "__label_%.6d", lp->value); | |
265 | ||
266 | /* Build the LABEL_DECL node. */ | |
267 | label_decl = gfc_build_label_decl (get_identifier (label_name)); | |
268 | ||
269 | /* Tell the debugger where the label came from. */ | |
f888a3fb | 270 | if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */ |
b31f705b | 271 | gfc_set_decl_location (label_decl, &lp->where); |
4ee9c684 | 272 | else |
273 | DECL_ARTIFICIAL (label_decl) = 1; | |
274 | ||
275 | /* Store the label in the label list and return the LABEL_DECL. */ | |
276 | lp->backend_decl = label_decl; | |
277 | return label_decl; | |
278 | } | |
279 | } | |
280 | ||
281 | ||
282 | /* Convert a gfc_symbol to an identifier of the same name. */ | |
283 | ||
284 | static tree | |
285 | gfc_sym_identifier (gfc_symbol * sym) | |
286 | { | |
287 | return (get_identifier (sym->name)); | |
288 | } | |
289 | ||
290 | ||
291 | /* Construct mangled name from symbol name. */ | |
292 | ||
293 | static tree | |
294 | gfc_sym_mangled_identifier (gfc_symbol * sym) | |
295 | { | |
296 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; | |
297 | ||
4f0fae8e | 298 | if (sym->module == NULL) |
4ee9c684 | 299 | return gfc_sym_identifier (sym); |
300 | else | |
301 | { | |
302 | snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name); | |
303 | return get_identifier (name); | |
304 | } | |
305 | } | |
306 | ||
307 | ||
308 | /* Construct mangled function name from symbol name. */ | |
309 | ||
310 | static tree | |
311 | gfc_sym_mangled_function_id (gfc_symbol * sym) | |
312 | { | |
313 | int has_underscore; | |
314 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; | |
315 | ||
4f0fae8e | 316 | if (sym->module == NULL || sym->attr.proc == PROC_EXTERNAL |
317 | || (sym->module != NULL && sym->attr.if_source == IFSRC_IFBODY)) | |
4ee9c684 | 318 | { |
319 | if (strcmp (sym->name, "MAIN__") == 0 | |
320 | || sym->attr.proc == PROC_INTRINSIC) | |
321 | return get_identifier (sym->name); | |
322 | ||
323 | if (gfc_option.flag_underscoring) | |
324 | { | |
325 | has_underscore = strchr (sym->name, '_') != 0; | |
326 | if (gfc_option.flag_second_underscore && has_underscore) | |
327 | snprintf (name, sizeof name, "%s__", sym->name); | |
328 | else | |
329 | snprintf (name, sizeof name, "%s_", sym->name); | |
330 | return get_identifier (name); | |
331 | } | |
332 | else | |
333 | return get_identifier (sym->name); | |
334 | } | |
335 | else | |
336 | { | |
337 | snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name); | |
338 | return get_identifier (name); | |
339 | } | |
340 | } | |
341 | ||
342 | ||
5ed82495 | 343 | /* Returns true if a variable of specified size should go on the stack. */ |
344 | ||
345 | int | |
346 | gfc_can_put_var_on_stack (tree size) | |
347 | { | |
348 | unsigned HOST_WIDE_INT low; | |
349 | ||
350 | if (!INTEGER_CST_P (size)) | |
351 | return 0; | |
352 | ||
353 | if (gfc_option.flag_max_stack_var_size < 0) | |
354 | return 1; | |
355 | ||
356 | if (TREE_INT_CST_HIGH (size) != 0) | |
357 | return 0; | |
358 | ||
359 | low = TREE_INT_CST_LOW (size); | |
360 | if (low > (unsigned HOST_WIDE_INT) gfc_option.flag_max_stack_var_size) | |
361 | return 0; | |
362 | ||
363 | /* TODO: Set a per-function stack size limit. */ | |
364 | ||
365 | return 1; | |
366 | } | |
367 | ||
368 | ||
b7bf3f81 | 369 | /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to |
370 | an expression involving its corresponding pointer. There are | |
371 | 2 cases; one for variable size arrays, and one for everything else, | |
372 | because variable-sized arrays require one fewer level of | |
373 | indirection. */ | |
374 | ||
375 | static void | |
376 | gfc_finish_cray_pointee (tree decl, gfc_symbol *sym) | |
377 | { | |
378 | tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer); | |
379 | tree value; | |
380 | ||
381 | /* Parameters need to be dereferenced. */ | |
382 | if (sym->cp_pointer->attr.dummy) | |
4fa2c167 | 383 | ptr_decl = build_fold_indirect_ref (ptr_decl); |
b7bf3f81 | 384 | |
385 | /* Check to see if we're dealing with a variable-sized array. */ | |
386 | if (sym->attr.dimension | |
387 | && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) | |
388 | { | |
942043f8 | 389 | /* These decls will be dereferenced later, so we don't dereference |
b7bf3f81 | 390 | them here. */ |
391 | value = convert (TREE_TYPE (decl), ptr_decl); | |
392 | } | |
393 | else | |
394 | { | |
395 | ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)), | |
396 | ptr_decl); | |
4fa2c167 | 397 | value = build_fold_indirect_ref (ptr_decl); |
b7bf3f81 | 398 | } |
399 | ||
400 | SET_DECL_VALUE_EXPR (decl, value); | |
401 | DECL_HAS_VALUE_EXPR_P (decl) = 1; | |
764f1175 | 402 | GFC_DECL_CRAY_POINTEE (decl) = 1; |
b7bf3f81 | 403 | /* This is a fake variable just for debugging purposes. */ |
404 | TREE_ASM_WRITTEN (decl) = 1; | |
405 | } | |
406 | ||
407 | ||
4ee9c684 | 408 | /* Finish processing of a declaration and install its initial value. */ |
409 | ||
410 | static void | |
411 | gfc_finish_decl (tree decl, tree init) | |
412 | { | |
413 | if (TREE_CODE (decl) == PARM_DECL) | |
22d678e8 | 414 | gcc_assert (init == NULL_TREE); |
4ee9c684 | 415 | /* Remember that PARM_DECL doesn't have a DECL_INITIAL field per se |
416 | -- it overlaps DECL_ARG_TYPE. */ | |
417 | else if (init == NULL_TREE) | |
22d678e8 | 418 | gcc_assert (DECL_INITIAL (decl) == NULL_TREE); |
4ee9c684 | 419 | else |
22d678e8 | 420 | gcc_assert (DECL_INITIAL (decl) == error_mark_node); |
4ee9c684 | 421 | |
422 | if (init != NULL_TREE) | |
423 | { | |
424 | if (TREE_CODE (decl) != TYPE_DECL) | |
425 | DECL_INITIAL (decl) = init; | |
426 | else | |
427 | { | |
428 | /* typedef foo = bar; store the type of bar as the type of foo. */ | |
429 | TREE_TYPE (decl) = TREE_TYPE (init); | |
430 | DECL_INITIAL (decl) = init = 0; | |
431 | } | |
432 | } | |
433 | ||
434 | if (TREE_CODE (decl) == VAR_DECL) | |
435 | { | |
436 | if (DECL_SIZE (decl) == NULL_TREE | |
437 | && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE) | |
438 | layout_decl (decl, 0); | |
439 | ||
440 | /* A static variable with an incomplete type is an error if it is | |
441 | initialized. Also if it is not file scope. Otherwise, let it | |
442 | through, but if it is not `extern' then it may cause an error | |
443 | message later. */ | |
444 | /* An automatic variable with an incomplete type is an error. */ | |
445 | if (DECL_SIZE (decl) == NULL_TREE | |
446 | && (TREE_STATIC (decl) ? (DECL_INITIAL (decl) != 0 | |
447 | || DECL_CONTEXT (decl) != 0) | |
448 | : !DECL_EXTERNAL (decl))) | |
449 | { | |
450 | gfc_fatal_error ("storage size not known"); | |
451 | } | |
452 | ||
453 | if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl)) | |
454 | && (DECL_SIZE (decl) != 0) | |
455 | && (TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)) | |
456 | { | |
457 | gfc_fatal_error ("storage size not constant"); | |
458 | } | |
459 | } | |
460 | ||
461 | } | |
462 | ||
463 | ||
464 | /* Apply symbol attributes to a variable, and add it to the function scope. */ | |
465 | ||
466 | static void | |
467 | gfc_finish_var_decl (tree decl, gfc_symbol * sym) | |
468 | { | |
f888a3fb | 469 | /* TREE_ADDRESSABLE means the address of this variable is actually needed. |
4ee9c684 | 470 | This is the equivalent of the TARGET variables. |
471 | We also need to set this if the variable is passed by reference in a | |
472 | CALL statement. */ | |
b549d2a5 | 473 | |
b7bf3f81 | 474 | /* Set DECL_VALUE_EXPR for Cray Pointees. */ |
b549d2a5 | 475 | if (sym->attr.cray_pointee) |
b7bf3f81 | 476 | gfc_finish_cray_pointee (decl, sym); |
b549d2a5 | 477 | |
4ee9c684 | 478 | if (sym->attr.target) |
479 | TREE_ADDRESSABLE (decl) = 1; | |
480 | /* If it wasn't used we wouldn't be getting it. */ | |
481 | TREE_USED (decl) = 1; | |
482 | ||
483 | /* Chain this decl to the pending declarations. Don't do pushdecl() | |
484 | because this would add them to the current scope rather than the | |
485 | function scope. */ | |
486 | if (current_function_decl != NULL_TREE) | |
487 | { | |
7af6a4af | 488 | if (sym->ns->proc_name->backend_decl == current_function_decl |
489 | || sym->result == sym) | |
4ee9c684 | 490 | gfc_add_decl_to_function (decl); |
491 | else | |
492 | gfc_add_decl_to_parent_function (decl); | |
493 | } | |
494 | ||
b7bf3f81 | 495 | if (sym->attr.cray_pointee) |
496 | return; | |
497 | ||
4ee9c684 | 498 | /* If a variable is USE associated, it's always external. */ |
499 | if (sym->attr.use_assoc) | |
500 | { | |
501 | DECL_EXTERNAL (decl) = 1; | |
502 | TREE_PUBLIC (decl) = 1; | |
503 | } | |
4f0fae8e | 504 | else if (sym->module && !sym->attr.result && !sym->attr.dummy) |
4ee9c684 | 505 | { |
6b20224d | 506 | /* TODO: Don't set sym->module for result or dummy variables. */ |
7af6a4af | 507 | gcc_assert (current_function_decl == NULL_TREE || sym->result == sym); |
4ee9c684 | 508 | /* This is the declaration of a module variable. */ |
509 | TREE_PUBLIC (decl) = 1; | |
510 | TREE_STATIC (decl) = 1; | |
511 | } | |
512 | ||
513 | if ((sym->attr.save || sym->attr.data || sym->value) | |
514 | && !sym->attr.use_assoc) | |
515 | TREE_STATIC (decl) = 1; | |
ef814c81 | 516 | |
517 | if (sym->attr.volatile_) | |
518 | { | |
519 | tree new; | |
520 | TREE_THIS_VOLATILE (decl) = 1; | |
521 | new = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE); | |
522 | TREE_TYPE (decl) = new; | |
523 | } | |
524 | ||
4ee9c684 | 525 | /* Keep variables larger than max-stack-var-size off stack. */ |
526 | if (!sym->ns->proc_name->attr.recursive | |
527 | && INTEGER_CST_P (DECL_SIZE_UNIT (decl)) | |
a3f2c0e1 | 528 | && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl)) |
529 | /* Put variable length auto array pointers always into stack. */ | |
530 | && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE | |
531 | || sym->attr.dimension == 0 | |
532 | || sym->as->type != AS_EXPLICIT | |
533 | || sym->attr.pointer | |
534 | || sym->attr.allocatable) | |
535 | && !DECL_ARTIFICIAL (decl)) | |
4ee9c684 | 536 | TREE_STATIC (decl) = 1; |
764f1175 | 537 | |
538 | /* Handle threadprivate variables. */ | |
5c3667a1 | 539 | if (sym->attr.threadprivate && targetm.have_tls |
764f1175 | 540 | && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
541 | DECL_TLS_MODEL (decl) = decl_default_tls_model (decl); | |
4ee9c684 | 542 | } |
543 | ||
544 | ||
545 | /* Allocate the lang-specific part of a decl. */ | |
546 | ||
547 | void | |
548 | gfc_allocate_lang_decl (tree decl) | |
549 | { | |
550 | DECL_LANG_SPECIFIC (decl) = (struct lang_decl *) | |
551 | ggc_alloc_cleared (sizeof (struct lang_decl)); | |
552 | } | |
553 | ||
554 | /* Remember a symbol to generate initialization/cleanup code at function | |
555 | entry/exit. */ | |
556 | ||
557 | static void | |
558 | gfc_defer_symbol_init (gfc_symbol * sym) | |
559 | { | |
560 | gfc_symbol *p; | |
561 | gfc_symbol *last; | |
562 | gfc_symbol *head; | |
563 | ||
564 | /* Don't add a symbol twice. */ | |
565 | if (sym->tlink) | |
566 | return; | |
567 | ||
568 | last = head = sym->ns->proc_name; | |
569 | p = last->tlink; | |
570 | ||
571 | /* Make sure that setup code for dummy variables which are used in the | |
572 | setup of other variables is generated first. */ | |
573 | if (sym->attr.dummy) | |
574 | { | |
575 | /* Find the first dummy arg seen after us, or the first non-dummy arg. | |
576 | This is a circular list, so don't go past the head. */ | |
577 | while (p != head | |
578 | && (!p->attr.dummy || p->dummy_order > sym->dummy_order)) | |
579 | { | |
580 | last = p; | |
581 | p = p->tlink; | |
582 | } | |
583 | } | |
584 | /* Insert in between last and p. */ | |
585 | last->tlink = sym; | |
586 | sym->tlink = p; | |
587 | } | |
588 | ||
589 | ||
590 | /* Create an array index type variable with function scope. */ | |
591 | ||
592 | static tree | |
593 | create_index_var (const char * pfx, int nest) | |
594 | { | |
595 | tree decl; | |
596 | ||
597 | decl = gfc_create_var_np (gfc_array_index_type, pfx); | |
598 | if (nest) | |
599 | gfc_add_decl_to_parent_function (decl); | |
600 | else | |
601 | gfc_add_decl_to_function (decl); | |
602 | return decl; | |
603 | } | |
604 | ||
605 | ||
606 | /* Create variables to hold all the non-constant bits of info for a | |
607 | descriptorless array. Remember these in the lang-specific part of the | |
608 | type. */ | |
609 | ||
610 | static void | |
611 | gfc_build_qualified_array (tree decl, gfc_symbol * sym) | |
612 | { | |
613 | tree type; | |
614 | int dim; | |
615 | int nest; | |
616 | ||
617 | type = TREE_TYPE (decl); | |
618 | ||
619 | /* We just use the descriptor, if there is one. */ | |
620 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
621 | return; | |
622 | ||
22d678e8 | 623 | gcc_assert (GFC_ARRAY_TYPE_P (type)); |
4ee9c684 | 624 | nest = (sym->ns->proc_name->backend_decl != current_function_decl) |
625 | && !sym->attr.contained; | |
626 | ||
627 | for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++) | |
628 | { | |
629 | if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) | |
630 | GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); | |
9ca15c9b | 631 | /* Don't try to use the unknown bound for assumed shape arrays. */ |
4ee9c684 | 632 | if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE |
633 | && (sym->as->type != AS_ASSUMED_SIZE | |
634 | || dim < GFC_TYPE_ARRAY_RANK (type) - 1)) | |
635 | GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); | |
636 | ||
637 | if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE) | |
638 | GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest); | |
639 | } | |
640 | if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE) | |
641 | { | |
642 | GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type, | |
643 | "offset"); | |
644 | if (nest) | |
645 | gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type)); | |
646 | else | |
647 | gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type)); | |
648 | } | |
d4163395 | 649 | |
650 | if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE | |
651 | && sym->as->type != AS_ASSUMED_SIZE) | |
652 | GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest); | |
653 | ||
654 | if (POINTER_TYPE_P (type)) | |
655 | { | |
656 | gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type))); | |
657 | gcc_assert (TYPE_LANG_SPECIFIC (type) | |
658 | == TYPE_LANG_SPECIFIC (TREE_TYPE (type))); | |
659 | type = TREE_TYPE (type); | |
660 | } | |
661 | ||
662 | if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type)) | |
663 | { | |
664 | tree size, range; | |
665 | ||
666 | size = build2 (MINUS_EXPR, gfc_array_index_type, | |
667 | GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node); | |
668 | range = build_range_type (gfc_array_index_type, gfc_index_zero_node, | |
669 | size); | |
670 | TYPE_DOMAIN (type) = range; | |
671 | layout_type (type); | |
672 | } | |
4ee9c684 | 673 | } |
674 | ||
675 | ||
676 | /* For some dummy arguments we don't use the actual argument directly. | |
5ed82495 | 677 | Instead we create a local decl and use that. This allows us to perform |
4ee9c684 | 678 | initialization, and construct full type information. */ |
679 | ||
680 | static tree | |
681 | gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy) | |
682 | { | |
683 | tree decl; | |
684 | tree type; | |
685 | gfc_array_spec *as; | |
686 | char *name; | |
687 | int packed; | |
688 | int n; | |
689 | bool known_size; | |
690 | ||
691 | if (sym->attr.pointer || sym->attr.allocatable) | |
692 | return dummy; | |
693 | ||
694 | /* Add to list of variables if not a fake result variable. */ | |
695 | if (sym->attr.result || sym->attr.dummy) | |
696 | gfc_defer_symbol_init (sym); | |
697 | ||
698 | type = TREE_TYPE (dummy); | |
22d678e8 | 699 | gcc_assert (TREE_CODE (dummy) == PARM_DECL |
4ee9c684 | 700 | && POINTER_TYPE_P (type)); |
701 | ||
f888a3fb | 702 | /* Do we know the element size? */ |
4ee9c684 | 703 | known_size = sym->ts.type != BT_CHARACTER |
704 | || INTEGER_CST_P (sym->ts.cl->backend_decl); | |
705 | ||
706 | if (known_size && !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (type))) | |
707 | { | |
708 | /* For descriptorless arrays with known element size the actual | |
709 | argument is sufficient. */ | |
22d678e8 | 710 | gcc_assert (GFC_ARRAY_TYPE_P (type)); |
4ee9c684 | 711 | gfc_build_qualified_array (dummy, sym); |
712 | return dummy; | |
713 | } | |
714 | ||
715 | type = TREE_TYPE (type); | |
716 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
717 | { | |
cb8e3560 | 718 | /* Create a descriptorless array pointer. */ |
4ee9c684 | 719 | as = sym->as; |
720 | packed = 0; | |
721 | if (!gfc_option.flag_repack_arrays) | |
722 | { | |
723 | if (as->type == AS_ASSUMED_SIZE) | |
724 | packed = 2; | |
725 | } | |
726 | else | |
727 | { | |
728 | if (as->type == AS_EXPLICIT) | |
729 | { | |
730 | packed = 2; | |
731 | for (n = 0; n < as->rank; n++) | |
732 | { | |
733 | if (!(as->upper[n] | |
734 | && as->lower[n] | |
735 | && as->upper[n]->expr_type == EXPR_CONSTANT | |
736 | && as->lower[n]->expr_type == EXPR_CONSTANT)) | |
737 | packed = 1; | |
738 | } | |
739 | } | |
740 | else | |
741 | packed = 1; | |
742 | } | |
743 | ||
744 | type = gfc_typenode_for_spec (&sym->ts); | |
745 | type = gfc_get_nodesc_array_type (type, sym->as, packed); | |
746 | } | |
747 | else | |
748 | { | |
749 | /* We now have an expression for the element size, so create a fully | |
750 | qualified type. Reset sym->backend decl or this will just return the | |
751 | old type. */ | |
d95efb59 | 752 | DECL_ARTIFICIAL (sym->backend_decl) = 1; |
4ee9c684 | 753 | sym->backend_decl = NULL_TREE; |
754 | type = gfc_sym_type (sym); | |
755 | packed = 2; | |
756 | } | |
757 | ||
758 | ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0); | |
759 | decl = build_decl (VAR_DECL, get_identifier (name), type); | |
760 | ||
761 | DECL_ARTIFICIAL (decl) = 1; | |
762 | TREE_PUBLIC (decl) = 0; | |
763 | TREE_STATIC (decl) = 0; | |
764 | DECL_EXTERNAL (decl) = 0; | |
765 | ||
766 | /* We should never get deferred shape arrays here. We used to because of | |
767 | frontend bugs. */ | |
22d678e8 | 768 | gcc_assert (sym->as->type != AS_DEFERRED); |
4ee9c684 | 769 | |
770 | switch (packed) | |
771 | { | |
772 | case 1: | |
773 | GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1; | |
774 | break; | |
775 | ||
776 | case 2: | |
777 | GFC_DECL_PACKED_ARRAY (decl) = 1; | |
778 | break; | |
779 | } | |
780 | ||
781 | gfc_build_qualified_array (decl, sym); | |
782 | ||
783 | if (DECL_LANG_SPECIFIC (dummy)) | |
784 | DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy); | |
785 | else | |
786 | gfc_allocate_lang_decl (decl); | |
787 | ||
788 | GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy; | |
789 | ||
790 | if (sym->ns->proc_name->backend_decl == current_function_decl | |
791 | || sym->attr.contained) | |
792 | gfc_add_decl_to_function (decl); | |
793 | else | |
794 | gfc_add_decl_to_parent_function (decl); | |
795 | ||
796 | return decl; | |
797 | } | |
798 | ||
799 | ||
800 | /* Return a constant or a variable to use as a string length. Does not | |
801 | add the decl to the current scope. */ | |
802 | ||
803 | static tree | |
804 | gfc_create_string_length (gfc_symbol * sym) | |
805 | { | |
806 | tree length; | |
807 | ||
22d678e8 | 808 | gcc_assert (sym->ts.cl); |
4ee9c684 | 809 | gfc_conv_const_charlen (sym->ts.cl); |
810 | ||
811 | if (sym->ts.cl->backend_decl == NULL_TREE) | |
812 | { | |
813 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; | |
814 | ||
815 | /* Also prefix the mangled name. */ | |
816 | strcpy (&name[1], sym->name); | |
817 | name[0] = '.'; | |
818 | length = build_decl (VAR_DECL, get_identifier (name), | |
9ad09405 | 819 | gfc_charlen_type_node); |
4ee9c684 | 820 | DECL_ARTIFICIAL (length) = 1; |
821 | TREE_USED (length) = 1; | |
d4163395 | 822 | if (sym->ns->proc_name->tlink != NULL) |
823 | gfc_defer_symbol_init (sym); | |
4ee9c684 | 824 | sym->ts.cl->backend_decl = length; |
825 | } | |
826 | ||
827 | return sym->ts.cl->backend_decl; | |
828 | } | |
829 | ||
c8f1568f | 830 | /* If a variable is assigned a label, we add another two auxiliary |
831 | variables. */ | |
832 | ||
833 | static void | |
834 | gfc_add_assign_aux_vars (gfc_symbol * sym) | |
835 | { | |
836 | tree addr; | |
837 | tree length; | |
838 | tree decl; | |
839 | ||
840 | gcc_assert (sym->backend_decl); | |
841 | ||
842 | decl = sym->backend_decl; | |
843 | gfc_allocate_lang_decl (decl); | |
844 | GFC_DECL_ASSIGN (decl) = 1; | |
845 | length = build_decl (VAR_DECL, create_tmp_var_name (sym->name), | |
846 | gfc_charlen_type_node); | |
847 | addr = build_decl (VAR_DECL, create_tmp_var_name (sym->name), | |
848 | pvoid_type_node); | |
849 | gfc_finish_var_decl (length, sym); | |
850 | gfc_finish_var_decl (addr, sym); | |
851 | /* STRING_LENGTH is also used as flag. Less than -1 means that | |
852 | ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the | |
853 | target label's address. Otherwise, value is the length of a format string | |
854 | and ASSIGN_ADDR is its address. */ | |
855 | if (TREE_STATIC (length)) | |
856 | DECL_INITIAL (length) = build_int_cst (NULL_TREE, -2); | |
857 | else | |
858 | gfc_defer_symbol_init (sym); | |
859 | ||
860 | GFC_DECL_STRING_LEN (decl) = length; | |
861 | GFC_DECL_ASSIGN_ADDR (decl) = addr; | |
862 | } | |
4ee9c684 | 863 | |
864 | /* Return the decl for a gfc_symbol, create it if it doesn't already | |
865 | exist. */ | |
866 | ||
867 | tree | |
868 | gfc_get_symbol_decl (gfc_symbol * sym) | |
869 | { | |
870 | tree decl; | |
871 | tree length = NULL_TREE; | |
4ee9c684 | 872 | int byref; |
873 | ||
0b5dc8b5 | 874 | gcc_assert (sym->attr.referenced |
875 | || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY); | |
4ee9c684 | 876 | |
877 | if (sym->ns && sym->ns->proc_name->attr.function) | |
878 | byref = gfc_return_by_reference (sym->ns->proc_name); | |
879 | else | |
880 | byref = 0; | |
881 | ||
882 | if ((sym->attr.dummy && ! sym->attr.function) || (sym->attr.result && byref)) | |
883 | { | |
884 | /* Return via extra parameter. */ | |
885 | if (sym->attr.result && byref | |
886 | && !sym->backend_decl) | |
887 | { | |
888 | sym->backend_decl = | |
889 | DECL_ARGUMENTS (sym->ns->proc_name->backend_decl); | |
c6871095 | 890 | /* For entry master function skip over the __entry |
891 | argument. */ | |
892 | if (sym->ns->proc_name->attr.entry_master) | |
893 | sym->backend_decl = TREE_CHAIN (sym->backend_decl); | |
4ee9c684 | 894 | } |
895 | ||
896 | /* Dummy variables should already have been created. */ | |
22d678e8 | 897 | gcc_assert (sym->backend_decl); |
4ee9c684 | 898 | |
899 | /* Create a character length variable. */ | |
900 | if (sym->ts.type == BT_CHARACTER) | |
901 | { | |
902 | if (sym->ts.cl->backend_decl == NULL_TREE) | |
d4163395 | 903 | length = gfc_create_string_length (sym); |
904 | else | |
905 | length = sym->ts.cl->backend_decl; | |
906 | if (TREE_CODE (length) == VAR_DECL | |
907 | && DECL_CONTEXT (length) == NULL_TREE) | |
4ee9c684 | 908 | { |
d95efb59 | 909 | /* Add the string length to the same context as the symbol. */ |
910 | if (DECL_CONTEXT (sym->backend_decl) == current_function_decl) | |
911 | gfc_add_decl_to_function (length); | |
912 | else | |
913 | gfc_add_decl_to_parent_function (length); | |
914 | ||
915 | gcc_assert (DECL_CONTEXT (sym->backend_decl) == | |
916 | DECL_CONTEXT (length)); | |
917 | ||
d4163395 | 918 | gfc_defer_symbol_init (sym); |
e8ff3944 | 919 | } |
4ee9c684 | 920 | } |
921 | ||
922 | /* Use a copy of the descriptor for dummy arrays. */ | |
923 | if (sym->attr.dimension && !TREE_USED (sym->backend_decl)) | |
924 | { | |
d95efb59 | 925 | decl = gfc_build_dummy_array_decl (sym, sym->backend_decl); |
926 | /* Prevent the dummy from being detected as unused if it is copied. */ | |
927 | if (sym->backend_decl != NULL && decl != sym->backend_decl) | |
928 | DECL_ARTIFICIAL (sym->backend_decl) = 1; | |
929 | sym->backend_decl = decl; | |
4ee9c684 | 930 | } |
931 | ||
932 | TREE_USED (sym->backend_decl) = 1; | |
c8f1568f | 933 | if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0) |
934 | { | |
935 | gfc_add_assign_aux_vars (sym); | |
936 | } | |
4ee9c684 | 937 | return sym->backend_decl; |
938 | } | |
939 | ||
940 | if (sym->backend_decl) | |
941 | return sym->backend_decl; | |
942 | ||
4ee9c684 | 943 | /* Catch function declarations. Only used for actual parameters. */ |
944 | if (sym->attr.flavor == FL_PROCEDURE) | |
945 | { | |
946 | decl = gfc_get_extern_function_decl (sym); | |
947 | return decl; | |
948 | } | |
949 | ||
950 | if (sym->attr.intrinsic) | |
951 | internal_error ("intrinsic variable which isn't a procedure"); | |
952 | ||
953 | /* Create string length decl first so that they can be used in the | |
954 | type declaration. */ | |
955 | if (sym->ts.type == BT_CHARACTER) | |
956 | length = gfc_create_string_length (sym); | |
957 | ||
958 | /* Create the decl for the variable. */ | |
959 | decl = build_decl (VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym)); | |
960 | ||
b31f705b | 961 | gfc_set_decl_location (decl, &sym->declared_at); |
962 | ||
f888a3fb | 963 | /* Symbols from modules should have their assembler names mangled. |
4ee9c684 | 964 | This is done here rather than in gfc_finish_var_decl because it |
965 | is different for string length variables. */ | |
4f0fae8e | 966 | if (sym->module) |
4ee9c684 | 967 | SET_DECL_ASSEMBLER_NAME (decl, gfc_sym_mangled_identifier (sym)); |
968 | ||
969 | if (sym->attr.dimension) | |
970 | { | |
971 | /* Create variables to hold the non-constant bits of array info. */ | |
972 | gfc_build_qualified_array (decl, sym); | |
973 | ||
974 | /* Remember this variable for allocation/cleanup. */ | |
975 | gfc_defer_symbol_init (sym); | |
976 | ||
977 | if ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer) | |
978 | GFC_DECL_PACKED_ARRAY (decl) = 1; | |
979 | } | |
980 | ||
2294b616 | 981 | if (sym->ts.type == BT_DERIVED && sym->ts.derived->attr.alloc_comp) |
982 | gfc_defer_symbol_init (sym); | |
983 | ||
4ee9c684 | 984 | gfc_finish_var_decl (decl, sym); |
985 | ||
bda1f152 | 986 | if (sym->ts.type == BT_CHARACTER) |
4ee9c684 | 987 | { |
4ee9c684 | 988 | /* Character variables need special handling. */ |
989 | gfc_allocate_lang_decl (decl); | |
990 | ||
bda1f152 | 991 | if (TREE_CODE (length) != INTEGER_CST) |
4ee9c684 | 992 | { |
993 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; | |
994 | ||
4f0fae8e | 995 | if (sym->module) |
4ee9c684 | 996 | { |
997 | /* Also prefix the mangled name for symbols from modules. */ | |
998 | strcpy (&name[1], sym->name); | |
999 | name[0] = '.'; | |
1000 | strcpy (&name[1], | |
1001 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (length))); | |
1002 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (name)); | |
1003 | } | |
1004 | gfc_finish_var_decl (length, sym); | |
22d678e8 | 1005 | gcc_assert (!sym->value); |
4ee9c684 | 1006 | } |
4ee9c684 | 1007 | } |
1008 | sym->backend_decl = decl; | |
1009 | ||
c8f1568f | 1010 | if (sym->attr.assign) |
21ebda4d | 1011 | gfc_add_assign_aux_vars (sym); |
c8f1568f | 1012 | |
bda1f152 | 1013 | if (TREE_STATIC (decl) && !sym->attr.use_assoc) |
1014 | { | |
1015 | /* Add static initializer. */ | |
1016 | DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, | |
1017 | TREE_TYPE (decl), sym->attr.dimension, | |
1018 | sym->attr.pointer || sym->attr.allocatable); | |
1019 | } | |
1020 | ||
4ee9c684 | 1021 | return decl; |
1022 | } | |
1023 | ||
1024 | ||
dbe60343 | 1025 | /* Substitute a temporary variable in place of the real one. */ |
1026 | ||
1027 | void | |
1028 | gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save) | |
1029 | { | |
1030 | save->attr = sym->attr; | |
1031 | save->decl = sym->backend_decl; | |
1032 | ||
1033 | gfc_clear_attr (&sym->attr); | |
1034 | sym->attr.referenced = 1; | |
1035 | sym->attr.flavor = FL_VARIABLE; | |
1036 | ||
1037 | sym->backend_decl = decl; | |
1038 | } | |
1039 | ||
1040 | ||
1041 | /* Restore the original variable. */ | |
1042 | ||
1043 | void | |
1044 | gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save) | |
1045 | { | |
1046 | sym->attr = save->attr; | |
1047 | sym->backend_decl = save->decl; | |
1048 | } | |
1049 | ||
1050 | ||
4ee9c684 | 1051 | /* Get a basic decl for an external function. */ |
1052 | ||
1053 | tree | |
1054 | gfc_get_extern_function_decl (gfc_symbol * sym) | |
1055 | { | |
1056 | tree type; | |
1057 | tree fndecl; | |
1058 | gfc_expr e; | |
1059 | gfc_intrinsic_sym *isym; | |
1060 | gfc_expr argexpr; | |
bdaed7d2 | 1061 | char s[GFC_MAX_SYMBOL_LEN + 13]; /* "f2c_specific" and '\0'. */ |
4ee9c684 | 1062 | tree name; |
1063 | tree mangled_name; | |
1064 | ||
1065 | if (sym->backend_decl) | |
1066 | return sym->backend_decl; | |
1067 | ||
1b716045 | 1068 | /* We should never be creating external decls for alternate entry points. |
1069 | The procedure may be an alternate entry point, but we don't want/need | |
1070 | to know that. */ | |
22d678e8 | 1071 | gcc_assert (!(sym->attr.entry || sym->attr.entry_master)); |
1b716045 | 1072 | |
4ee9c684 | 1073 | if (sym->attr.intrinsic) |
1074 | { | |
1075 | /* Call the resolution function to get the actual name. This is | |
1076 | a nasty hack which relies on the resolution functions only looking | |
1077 | at the first argument. We pass NULL for the second argument | |
1078 | otherwise things like AINT get confused. */ | |
1079 | isym = gfc_find_function (sym->name); | |
22d678e8 | 1080 | gcc_assert (isym->resolve.f0 != NULL); |
4ee9c684 | 1081 | |
1082 | memset (&e, 0, sizeof (e)); | |
1083 | e.expr_type = EXPR_FUNCTION; | |
1084 | ||
1085 | memset (&argexpr, 0, sizeof (argexpr)); | |
22d678e8 | 1086 | gcc_assert (isym->formal); |
4ee9c684 | 1087 | argexpr.ts = isym->formal->ts; |
1088 | ||
1089 | if (isym->formal->next == NULL) | |
1090 | isym->resolve.f1 (&e, &argexpr); | |
1091 | else | |
1092 | { | |
37e0271a | 1093 | if (isym->formal->next->next == NULL) |
1094 | isym->resolve.f2 (&e, &argexpr, NULL); | |
1095 | else | |
1096 | { | |
1097 | /* All specific intrinsics take less than 4 arguments. */ | |
1098 | gcc_assert (isym->formal->next->next->next == NULL); | |
1099 | isym->resolve.f3 (&e, &argexpr, NULL, NULL); | |
1100 | } | |
4ee9c684 | 1101 | } |
bdaed7d2 | 1102 | |
1103 | if (gfc_option.flag_f2c | |
1104 | && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind) | |
1105 | || e.ts.type == BT_COMPLEX)) | |
1106 | { | |
1107 | /* Specific which needs a different implementation if f2c | |
1108 | calling conventions are used. */ | |
1109 | sprintf (s, "f2c_specific%s", e.value.function.name); | |
1110 | } | |
1111 | else | |
1112 | sprintf (s, "specific%s", e.value.function.name); | |
1113 | ||
4ee9c684 | 1114 | name = get_identifier (s); |
1115 | mangled_name = name; | |
1116 | } | |
1117 | else | |
1118 | { | |
1119 | name = gfc_sym_identifier (sym); | |
1120 | mangled_name = gfc_sym_mangled_function_id (sym); | |
1121 | } | |
1122 | ||
1123 | type = gfc_get_function_type (sym); | |
1124 | fndecl = build_decl (FUNCTION_DECL, name, type); | |
1125 | ||
1126 | SET_DECL_ASSEMBLER_NAME (fndecl, mangled_name); | |
1127 | /* If the return type is a pointer, avoid alias issues by setting | |
1128 | DECL_IS_MALLOC to nonzero. This means that the function should be | |
1129 | treated as if it were a malloc, meaning it returns a pointer that | |
1130 | is not an alias. */ | |
1131 | if (POINTER_TYPE_P (type)) | |
1132 | DECL_IS_MALLOC (fndecl) = 1; | |
1133 | ||
1134 | /* Set the context of this decl. */ | |
1135 | if (0 && sym->ns && sym->ns->proc_name) | |
1136 | { | |
1137 | /* TODO: Add external decls to the appropriate scope. */ | |
1138 | DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl; | |
1139 | } | |
1140 | else | |
1141 | { | |
f888a3fb | 1142 | /* Global declaration, e.g. intrinsic subroutine. */ |
4ee9c684 | 1143 | DECL_CONTEXT (fndecl) = NULL_TREE; |
1144 | } | |
1145 | ||
1146 | DECL_EXTERNAL (fndecl) = 1; | |
1147 | ||
f888a3fb | 1148 | /* This specifies if a function is globally addressable, i.e. it is |
4ee9c684 | 1149 | the opposite of declaring static in C. */ |
1150 | TREE_PUBLIC (fndecl) = 1; | |
1151 | ||
1152 | /* Set attributes for PURE functions. A call to PURE function in the | |
1153 | Fortran 95 sense is both pure and without side effects in the C | |
1154 | sense. */ | |
1155 | if (sym->attr.pure || sym->attr.elemental) | |
1156 | { | |
4d4b9f0e | 1157 | if (sym->attr.function && !gfc_return_by_reference (sym)) |
be393645 | 1158 | DECL_IS_PURE (fndecl) = 1; |
1159 | /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT) | |
1160 | parameters and don't use alternate returns (is this | |
1161 | allowed?). In that case, calls to them are meaningless, and | |
1b716045 | 1162 | can be optimized away. See also in build_function_decl(). */ |
be393645 | 1163 | TREE_SIDE_EFFECTS (fndecl) = 0; |
4ee9c684 | 1164 | } |
1165 | ||
6e27d773 | 1166 | /* Mark non-returning functions. */ |
1167 | if (sym->attr.noreturn) | |
1168 | TREE_THIS_VOLATILE(fndecl) = 1; | |
1169 | ||
4ee9c684 | 1170 | sym->backend_decl = fndecl; |
1171 | ||
1172 | if (DECL_CONTEXT (fndecl) == NULL_TREE) | |
1173 | pushdecl_top_level (fndecl); | |
1174 | ||
1175 | return fndecl; | |
1176 | } | |
1177 | ||
1178 | ||
1179 | /* Create a declaration for a procedure. For external functions (in the C | |
1b716045 | 1180 | sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is |
1181 | a master function with alternate entry points. */ | |
4ee9c684 | 1182 | |
1b716045 | 1183 | static void |
1184 | build_function_decl (gfc_symbol * sym) | |
4ee9c684 | 1185 | { |
1b716045 | 1186 | tree fndecl, type; |
4ee9c684 | 1187 | symbol_attribute attr; |
1b716045 | 1188 | tree result_decl; |
4ee9c684 | 1189 | gfc_formal_arglist *f; |
1190 | ||
22d678e8 | 1191 | gcc_assert (!sym->backend_decl); |
1192 | gcc_assert (!sym->attr.external); | |
4ee9c684 | 1193 | |
b31f705b | 1194 | /* Set the line and filename. sym->declared_at seems to point to the |
1195 | last statement for subroutines, but it'll do for now. */ | |
1196 | gfc_set_backend_locus (&sym->declared_at); | |
1197 | ||
4ee9c684 | 1198 | /* Allow only one nesting level. Allow public declarations. */ |
22d678e8 | 1199 | gcc_assert (current_function_decl == NULL_TREE |
4ee9c684 | 1200 | || DECL_CONTEXT (current_function_decl) == NULL_TREE); |
1201 | ||
1202 | type = gfc_get_function_type (sym); | |
1203 | fndecl = build_decl (FUNCTION_DECL, gfc_sym_identifier (sym), type); | |
1204 | ||
1205 | /* Perform name mangling if this is a top level or module procedure. */ | |
1206 | if (current_function_decl == NULL_TREE) | |
1207 | SET_DECL_ASSEMBLER_NAME (fndecl, gfc_sym_mangled_function_id (sym)); | |
1208 | ||
1209 | /* Figure out the return type of the declared function, and build a | |
f888a3fb | 1210 | RESULT_DECL for it. If this is a subroutine with alternate |
4ee9c684 | 1211 | returns, build a RESULT_DECL for it. */ |
1212 | attr = sym->attr; | |
1213 | ||
1214 | result_decl = NULL_TREE; | |
1215 | /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */ | |
1216 | if (attr.function) | |
1217 | { | |
1218 | if (gfc_return_by_reference (sym)) | |
1219 | type = void_type_node; | |
1220 | else | |
1221 | { | |
1222 | if (sym->result != sym) | |
1223 | result_decl = gfc_sym_identifier (sym->result); | |
1224 | ||
1225 | type = TREE_TYPE (TREE_TYPE (fndecl)); | |
1226 | } | |
1227 | } | |
1228 | else | |
1229 | { | |
1230 | /* Look for alternate return placeholders. */ | |
1231 | int has_alternate_returns = 0; | |
1232 | for (f = sym->formal; f; f = f->next) | |
1233 | { | |
1234 | if (f->sym == NULL) | |
1235 | { | |
1236 | has_alternate_returns = 1; | |
1237 | break; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | if (has_alternate_returns) | |
1242 | type = integer_type_node; | |
1243 | else | |
1244 | type = void_type_node; | |
1245 | } | |
1246 | ||
1247 | result_decl = build_decl (RESULT_DECL, result_decl, type); | |
540edea7 | 1248 | DECL_ARTIFICIAL (result_decl) = 1; |
1249 | DECL_IGNORED_P (result_decl) = 1; | |
4ee9c684 | 1250 | DECL_CONTEXT (result_decl) = fndecl; |
1251 | DECL_RESULT (fndecl) = result_decl; | |
1252 | ||
1253 | /* Don't call layout_decl for a RESULT_DECL. | |
f888a3fb | 1254 | layout_decl (result_decl, 0); */ |
4ee9c684 | 1255 | |
1256 | /* If the return type is a pointer, avoid alias issues by setting | |
1257 | DECL_IS_MALLOC to nonzero. This means that the function should be | |
1258 | treated as if it were a malloc, meaning it returns a pointer that | |
1259 | is not an alias. */ | |
1260 | if (POINTER_TYPE_P (type)) | |
1261 | DECL_IS_MALLOC (fndecl) = 1; | |
1262 | ||
1263 | /* Set up all attributes for the function. */ | |
1264 | DECL_CONTEXT (fndecl) = current_function_decl; | |
1265 | DECL_EXTERNAL (fndecl) = 0; | |
1266 | ||
9d138f47 | 1267 | /* This specifies if a function is globally visible, i.e. it is |
dfc222eb | 1268 | the opposite of declaring static in C. */ |
1b716045 | 1269 | if (DECL_CONTEXT (fndecl) == NULL_TREE |
1270 | && !sym->attr.entry_master) | |
4ee9c684 | 1271 | TREE_PUBLIC (fndecl) = 1; |
1272 | ||
1273 | /* TREE_STATIC means the function body is defined here. */ | |
e4b2c26c | 1274 | TREE_STATIC (fndecl) = 1; |
4ee9c684 | 1275 | |
f888a3fb | 1276 | /* Set attributes for PURE functions. A call to a PURE function in the |
4ee9c684 | 1277 | Fortran 95 sense is both pure and without side effects in the C |
1278 | sense. */ | |
1279 | if (attr.pure || attr.elemental) | |
1280 | { | |
be393645 | 1281 | /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments |
1282 | including a alternate return. In that case it can also be | |
231e961a | 1283 | marked as PURE. See also in gfc_get_extern_function_decl(). */ |
4c319962 | 1284 | if (attr.function && !gfc_return_by_reference (sym)) |
be393645 | 1285 | DECL_IS_PURE (fndecl) = 1; |
4ee9c684 | 1286 | TREE_SIDE_EFFECTS (fndecl) = 0; |
1287 | } | |
1288 | ||
1289 | /* Layout the function declaration and put it in the binding level | |
1290 | of the current function. */ | |
e4b2c26c | 1291 | pushdecl (fndecl); |
1b716045 | 1292 | |
1293 | sym->backend_decl = fndecl; | |
1294 | } | |
1295 | ||
1296 | ||
1297 | /* Create the DECL_ARGUMENTS for a procedure. */ | |
1298 | ||
1299 | static void | |
1300 | create_function_arglist (gfc_symbol * sym) | |
1301 | { | |
1302 | tree fndecl; | |
1303 | gfc_formal_arglist *f; | |
d4163395 | 1304 | tree typelist, hidden_typelist; |
1305 | tree arglist, hidden_arglist; | |
1b716045 | 1306 | tree type; |
1307 | tree parm; | |
1308 | ||
1309 | fndecl = sym->backend_decl; | |
1310 | ||
e4b2c26c | 1311 | /* Build formal argument list. Make sure that their TREE_CONTEXT is |
1312 | the new FUNCTION_DECL node. */ | |
e4b2c26c | 1313 | arglist = NULL_TREE; |
d4163395 | 1314 | hidden_arglist = NULL_TREE; |
e4b2c26c | 1315 | typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); |
1b716045 | 1316 | |
1317 | if (sym->attr.entry_master) | |
1318 | { | |
1319 | type = TREE_VALUE (typelist); | |
1320 | parm = build_decl (PARM_DECL, get_identifier ("__entry"), type); | |
1321 | ||
1322 | DECL_CONTEXT (parm) = fndecl; | |
1323 | DECL_ARG_TYPE (parm) = type; | |
1324 | TREE_READONLY (parm) = 1; | |
1325 | gfc_finish_decl (parm, NULL_TREE); | |
d95efb59 | 1326 | DECL_ARTIFICIAL (parm) = 1; |
1b716045 | 1327 | |
1328 | arglist = chainon (arglist, parm); | |
1329 | typelist = TREE_CHAIN (typelist); | |
1330 | } | |
1331 | ||
e4b2c26c | 1332 | if (gfc_return_by_reference (sym)) |
4ee9c684 | 1333 | { |
d4163395 | 1334 | tree type = TREE_VALUE (typelist), length = NULL; |
4ee9c684 | 1335 | |
e4b2c26c | 1336 | if (sym->ts.type == BT_CHARACTER) |
1337 | { | |
e4b2c26c | 1338 | /* Length of character result. */ |
d4163395 | 1339 | tree len_type = TREE_VALUE (TREE_CHAIN (typelist)); |
1340 | gcc_assert (len_type == gfc_charlen_type_node); | |
4ee9c684 | 1341 | |
e4b2c26c | 1342 | length = build_decl (PARM_DECL, |
1343 | get_identifier (".__result"), | |
d4163395 | 1344 | len_type); |
e4b2c26c | 1345 | if (!sym->ts.cl->length) |
1346 | { | |
1347 | sym->ts.cl->backend_decl = length; | |
1348 | TREE_USED (length) = 1; | |
4ee9c684 | 1349 | } |
22d678e8 | 1350 | gcc_assert (TREE_CODE (length) == PARM_DECL); |
e4b2c26c | 1351 | DECL_CONTEXT (length) = fndecl; |
d4163395 | 1352 | DECL_ARG_TYPE (length) = len_type; |
e4b2c26c | 1353 | TREE_READONLY (length) = 1; |
b5b40b3f | 1354 | DECL_ARTIFICIAL (length) = 1; |
e4b2c26c | 1355 | gfc_finish_decl (length, NULL_TREE); |
d4163395 | 1356 | if (sym->ts.cl->backend_decl == NULL |
1357 | || sym->ts.cl->backend_decl == length) | |
1358 | { | |
1359 | gfc_symbol *arg; | |
1360 | tree backend_decl; | |
4ee9c684 | 1361 | |
d4163395 | 1362 | if (sym->ts.cl->backend_decl == NULL) |
1363 | { | |
1364 | tree len = build_decl (VAR_DECL, | |
1365 | get_identifier ("..__result"), | |
1366 | gfc_charlen_type_node); | |
1367 | DECL_ARTIFICIAL (len) = 1; | |
1368 | TREE_USED (len) = 1; | |
1369 | sym->ts.cl->backend_decl = len; | |
1370 | } | |
4ee9c684 | 1371 | |
d4163395 | 1372 | /* Make sure PARM_DECL type doesn't point to incomplete type. */ |
1373 | arg = sym->result ? sym->result : sym; | |
1374 | backend_decl = arg->backend_decl; | |
1375 | /* Temporary clear it, so that gfc_sym_type creates complete | |
1376 | type. */ | |
1377 | arg->backend_decl = NULL; | |
1378 | type = gfc_sym_type (arg); | |
1379 | arg->backend_decl = backend_decl; | |
1380 | type = build_reference_type (type); | |
1381 | } | |
1382 | } | |
4ee9c684 | 1383 | |
d4163395 | 1384 | parm = build_decl (PARM_DECL, get_identifier ("__result"), type); |
4ee9c684 | 1385 | |
d4163395 | 1386 | DECL_CONTEXT (parm) = fndecl; |
1387 | DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); | |
1388 | TREE_READONLY (parm) = 1; | |
1389 | DECL_ARTIFICIAL (parm) = 1; | |
1390 | gfc_finish_decl (parm, NULL_TREE); | |
4ee9c684 | 1391 | |
d4163395 | 1392 | arglist = chainon (arglist, parm); |
1393 | typelist = TREE_CHAIN (typelist); | |
4ee9c684 | 1394 | |
d4163395 | 1395 | if (sym->ts.type == BT_CHARACTER) |
1396 | { | |
1397 | gfc_allocate_lang_decl (parm); | |
1398 | arglist = chainon (arglist, length); | |
e4b2c26c | 1399 | typelist = TREE_CHAIN (typelist); |
1400 | } | |
1401 | } | |
4ee9c684 | 1402 | |
d4163395 | 1403 | hidden_typelist = typelist; |
1404 | for (f = sym->formal; f; f = f->next) | |
1405 | if (f->sym != NULL) /* Ignore alternate returns. */ | |
1406 | hidden_typelist = TREE_CHAIN (hidden_typelist); | |
1407 | ||
e4b2c26c | 1408 | for (f = sym->formal; f; f = f->next) |
1409 | { | |
1410 | char name[GFC_MAX_SYMBOL_LEN + 2]; | |
d4163395 | 1411 | |
e4b2c26c | 1412 | /* Ignore alternate returns. */ |
1413 | if (f->sym == NULL) | |
1414 | continue; | |
4ee9c684 | 1415 | |
e4b2c26c | 1416 | type = TREE_VALUE (typelist); |
4ee9c684 | 1417 | |
d4163395 | 1418 | if (f->sym->ts.type == BT_CHARACTER) |
1419 | { | |
1420 | tree len_type = TREE_VALUE (hidden_typelist); | |
1421 | tree length = NULL_TREE; | |
1422 | gcc_assert (len_type == gfc_charlen_type_node); | |
1423 | ||
1424 | strcpy (&name[1], f->sym->name); | |
1425 | name[0] = '_'; | |
1426 | length = build_decl (PARM_DECL, get_identifier (name), len_type); | |
4ee9c684 | 1427 | |
d4163395 | 1428 | hidden_arglist = chainon (hidden_arglist, length); |
1429 | DECL_CONTEXT (length) = fndecl; | |
1430 | DECL_ARTIFICIAL (length) = 1; | |
1431 | DECL_ARG_TYPE (length) = len_type; | |
1432 | TREE_READONLY (length) = 1; | |
1433 | gfc_finish_decl (length, NULL_TREE); | |
4ee9c684 | 1434 | |
d4163395 | 1435 | /* TODO: Check string lengths when -fbounds-check. */ |
4ee9c684 | 1436 | |
d4163395 | 1437 | /* Use the passed value for assumed length variables. */ |
1438 | if (!f->sym->ts.cl->length) | |
4ee9c684 | 1439 | { |
d4163395 | 1440 | TREE_USED (length) = 1; |
1441 | if (!f->sym->ts.cl->backend_decl) | |
1442 | f->sym->ts.cl->backend_decl = length; | |
1443 | else | |
1444 | { | |
1445 | /* there is already another variable using this | |
1446 | gfc_charlen node, build a new one for this variable | |
1447 | and chain it into the list of gfc_charlens. | |
1448 | This happens for e.g. in the case | |
1449 | CHARACTER(*)::c1,c2 | |
1450 | since CHARACTER declarations on the same line share | |
1451 | the same gfc_charlen node. */ | |
1452 | gfc_charlen *cl; | |
e4b2c26c | 1453 | |
d4163395 | 1454 | cl = gfc_get_charlen (); |
1455 | cl->backend_decl = length; | |
1456 | cl->next = f->sym->ts.cl->next; | |
1457 | f->sym->ts.cl->next = cl; | |
1458 | f->sym->ts.cl = cl; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | hidden_typelist = TREE_CHAIN (hidden_typelist); | |
1463 | ||
1464 | if (f->sym->ts.cl->backend_decl == NULL | |
1465 | || f->sym->ts.cl->backend_decl == length) | |
1466 | { | |
1467 | if (f->sym->ts.cl->backend_decl == NULL) | |
1468 | gfc_create_string_length (f->sym); | |
1469 | ||
1470 | /* Make sure PARM_DECL type doesn't point to incomplete type. */ | |
1471 | if (f->sym->attr.flavor == FL_PROCEDURE) | |
1472 | type = build_pointer_type (gfc_get_function_type (f->sym)); | |
1473 | else | |
1474 | type = gfc_sym_type (f->sym); | |
4ee9c684 | 1475 | } |
4ee9c684 | 1476 | } |
1477 | ||
d4163395 | 1478 | /* For non-constant length array arguments, make sure they use |
1479 | a different type node from TYPE_ARG_TYPES type. */ | |
1480 | if (f->sym->attr.dimension | |
1481 | && type == TREE_VALUE (typelist) | |
1482 | && TREE_CODE (type) == POINTER_TYPE | |
1483 | && GFC_ARRAY_TYPE_P (type) | |
1484 | && f->sym->as->type != AS_ASSUMED_SIZE | |
1485 | && ! COMPLETE_TYPE_P (TREE_TYPE (type))) | |
1486 | { | |
1487 | if (f->sym->attr.flavor == FL_PROCEDURE) | |
1488 | type = build_pointer_type (gfc_get_function_type (f->sym)); | |
1489 | else | |
1490 | type = gfc_sym_type (f->sym); | |
1491 | } | |
1492 | ||
1493 | /* Build a the argument declaration. */ | |
1494 | parm = build_decl (PARM_DECL, gfc_sym_identifier (f->sym), type); | |
1495 | ||
1496 | /* Fill in arg stuff. */ | |
1497 | DECL_CONTEXT (parm) = fndecl; | |
1498 | DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); | |
1499 | /* All implementation args are read-only. */ | |
1500 | TREE_READONLY (parm) = 1; | |
1501 | ||
1502 | gfc_finish_decl (parm, NULL_TREE); | |
1503 | ||
1504 | f->sym->backend_decl = parm; | |
1505 | ||
1506 | arglist = chainon (arglist, parm); | |
e4b2c26c | 1507 | typelist = TREE_CHAIN (typelist); |
4ee9c684 | 1508 | } |
e4b2c26c | 1509 | |
d4163395 | 1510 | /* Add the hidden string length parameters. */ |
1511 | arglist = chainon (arglist, hidden_arglist); | |
1512 | ||
1513 | gcc_assert (TREE_VALUE (hidden_typelist) == void_type_node); | |
e4b2c26c | 1514 | DECL_ARGUMENTS (fndecl) = arglist; |
1b716045 | 1515 | } |
e4b2c26c | 1516 | |
1b716045 | 1517 | /* Convert FNDECL's code to GIMPLE and handle any nested functions. */ |
1518 | ||
1519 | static void | |
1520 | gfc_gimplify_function (tree fndecl) | |
1521 | { | |
1522 | struct cgraph_node *cgn; | |
1523 | ||
1524 | gimplify_function_tree (fndecl); | |
1525 | dump_function (TDI_generic, fndecl); | |
1526 | ||
764f1175 | 1527 | /* Generate errors for structured block violations. */ |
1528 | /* ??? Could be done as part of resolve_labels. */ | |
1529 | if (flag_openmp) | |
1530 | diagnose_omp_structured_block_errors (fndecl); | |
1531 | ||
1b716045 | 1532 | /* Convert all nested functions to GIMPLE now. We do things in this order |
1533 | so that items like VLA sizes are expanded properly in the context of the | |
1534 | correct function. */ | |
1535 | cgn = cgraph_node (fndecl); | |
1536 | for (cgn = cgn->nested; cgn; cgn = cgn->next_nested) | |
1537 | gfc_gimplify_function (cgn->decl); | |
1538 | } | |
1539 | ||
1540 | ||
1541 | /* Do the setup necessary before generating the body of a function. */ | |
1542 | ||
1543 | static void | |
1544 | trans_function_start (gfc_symbol * sym) | |
1545 | { | |
1546 | tree fndecl; | |
1547 | ||
1548 | fndecl = sym->backend_decl; | |
1549 | ||
f888a3fb | 1550 | /* Let GCC know the current scope is this function. */ |
1b716045 | 1551 | current_function_decl = fndecl; |
1552 | ||
f888a3fb | 1553 | /* Let the world know what we're about to do. */ |
1b716045 | 1554 | announce_function (fndecl); |
1555 | ||
1556 | if (DECL_CONTEXT (fndecl) == NULL_TREE) | |
1557 | { | |
f888a3fb | 1558 | /* Create RTL for function declaration. */ |
1b716045 | 1559 | rest_of_decl_compilation (fndecl, 1, 0); |
1560 | } | |
1561 | ||
f888a3fb | 1562 | /* Create RTL for function definition. */ |
1b716045 | 1563 | make_decl_rtl (fndecl); |
1564 | ||
1b716045 | 1565 | init_function_start (fndecl); |
1566 | ||
1567 | /* Even though we're inside a function body, we still don't want to | |
1568 | call expand_expr to calculate the size of a variable-sized array. | |
1569 | We haven't necessarily assigned RTL to all variables yet, so it's | |
1570 | not safe to try to expand expressions involving them. */ | |
1571 | cfun->x_dont_save_pending_sizes_p = 1; | |
1572 | ||
f888a3fb | 1573 | /* function.c requires a push at the start of the function. */ |
1b716045 | 1574 | pushlevel (0); |
1575 | } | |
1576 | ||
1577 | /* Create thunks for alternate entry points. */ | |
1578 | ||
1579 | static void | |
1580 | build_entry_thunks (gfc_namespace * ns) | |
1581 | { | |
1582 | gfc_formal_arglist *formal; | |
1583 | gfc_formal_arglist *thunk_formal; | |
1584 | gfc_entry_list *el; | |
1585 | gfc_symbol *thunk_sym; | |
1586 | stmtblock_t body; | |
1587 | tree thunk_fndecl; | |
1588 | tree args; | |
1589 | tree string_args; | |
1590 | tree tmp; | |
b31f705b | 1591 | locus old_loc; |
1b716045 | 1592 | |
1593 | /* This should always be a toplevel function. */ | |
22d678e8 | 1594 | gcc_assert (current_function_decl == NULL_TREE); |
1b716045 | 1595 | |
b31f705b | 1596 | gfc_get_backend_locus (&old_loc); |
1b716045 | 1597 | for (el = ns->entries; el; el = el->next) |
1598 | { | |
1599 | thunk_sym = el->sym; | |
1600 | ||
1601 | build_function_decl (thunk_sym); | |
1602 | create_function_arglist (thunk_sym); | |
1603 | ||
1604 | trans_function_start (thunk_sym); | |
1605 | ||
1606 | thunk_fndecl = thunk_sym->backend_decl; | |
1607 | ||
1608 | gfc_start_block (&body); | |
1609 | ||
f888a3fb | 1610 | /* Pass extra parameter identifying this entry point. */ |
7016c612 | 1611 | tmp = build_int_cst (gfc_array_index_type, el->id); |
1b716045 | 1612 | args = tree_cons (NULL_TREE, tmp, NULL_TREE); |
1613 | string_args = NULL_TREE; | |
1614 | ||
c6871095 | 1615 | if (thunk_sym->attr.function) |
1616 | { | |
1617 | if (gfc_return_by_reference (ns->proc_name)) | |
1618 | { | |
1619 | tree ref = DECL_ARGUMENTS (current_function_decl); | |
1620 | args = tree_cons (NULL_TREE, ref, args); | |
1621 | if (ns->proc_name->ts.type == BT_CHARACTER) | |
1622 | args = tree_cons (NULL_TREE, TREE_CHAIN (ref), | |
1623 | args); | |
1624 | } | |
1625 | } | |
1626 | ||
1b716045 | 1627 | for (formal = ns->proc_name->formal; formal; formal = formal->next) |
1628 | { | |
c6871095 | 1629 | /* Ignore alternate returns. */ |
1630 | if (formal->sym == NULL) | |
1631 | continue; | |
1632 | ||
1b716045 | 1633 | /* We don't have a clever way of identifying arguments, so resort to |
1634 | a brute-force search. */ | |
1635 | for (thunk_formal = thunk_sym->formal; | |
1636 | thunk_formal; | |
1637 | thunk_formal = thunk_formal->next) | |
1638 | { | |
1639 | if (thunk_formal->sym == formal->sym) | |
1640 | break; | |
1641 | } | |
1642 | ||
1643 | if (thunk_formal) | |
1644 | { | |
1645 | /* Pass the argument. */ | |
d95efb59 | 1646 | DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1; |
1b716045 | 1647 | args = tree_cons (NULL_TREE, thunk_formal->sym->backend_decl, |
1648 | args); | |
1649 | if (formal->sym->ts.type == BT_CHARACTER) | |
1650 | { | |
1651 | tmp = thunk_formal->sym->ts.cl->backend_decl; | |
1652 | string_args = tree_cons (NULL_TREE, tmp, string_args); | |
1653 | } | |
1654 | } | |
1655 | else | |
1656 | { | |
1657 | /* Pass NULL for a missing argument. */ | |
1658 | args = tree_cons (NULL_TREE, null_pointer_node, args); | |
1659 | if (formal->sym->ts.type == BT_CHARACTER) | |
1660 | { | |
7d3075f6 | 1661 | tmp = build_int_cst (gfc_charlen_type_node, 0); |
1b716045 | 1662 | string_args = tree_cons (NULL_TREE, tmp, string_args); |
1663 | } | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | /* Call the master function. */ | |
1668 | args = nreverse (args); | |
1669 | args = chainon (args, nreverse (string_args)); | |
1670 | tmp = ns->proc_name->backend_decl; | |
ac47d547 | 1671 | tmp = build_function_call_expr (tmp, args); |
c6871095 | 1672 | if (ns->proc_name->attr.mixed_entry_master) |
1673 | { | |
1674 | tree union_decl, field; | |
1675 | tree master_type = TREE_TYPE (ns->proc_name->backend_decl); | |
1676 | ||
1677 | union_decl = build_decl (VAR_DECL, get_identifier ("__result"), | |
1678 | TREE_TYPE (master_type)); | |
1679 | DECL_ARTIFICIAL (union_decl) = 1; | |
1680 | DECL_EXTERNAL (union_decl) = 0; | |
1681 | TREE_PUBLIC (union_decl) = 0; | |
1682 | TREE_USED (union_decl) = 1; | |
1683 | layout_decl (union_decl, 0); | |
1684 | pushdecl (union_decl); | |
1685 | ||
1686 | DECL_CONTEXT (union_decl) = current_function_decl; | |
1687 | tmp = build2 (MODIFY_EXPR, | |
1688 | TREE_TYPE (union_decl), | |
1689 | union_decl, tmp); | |
1690 | gfc_add_expr_to_block (&body, tmp); | |
1691 | ||
1692 | for (field = TYPE_FIELDS (TREE_TYPE (union_decl)); | |
1693 | field; field = TREE_CHAIN (field)) | |
1694 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), | |
1695 | thunk_sym->result->name) == 0) | |
1696 | break; | |
1697 | gcc_assert (field != NULL_TREE); | |
1698 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), union_decl, field, | |
1699 | NULL_TREE); | |
1700 | tmp = build2 (MODIFY_EXPR, | |
1701 | TREE_TYPE (DECL_RESULT (current_function_decl)), | |
1702 | DECL_RESULT (current_function_decl), tmp); | |
1703 | tmp = build1_v (RETURN_EXPR, tmp); | |
1704 | } | |
1705 | else if (TREE_TYPE (DECL_RESULT (current_function_decl)) | |
1706 | != void_type_node) | |
1707 | { | |
1708 | tmp = build2 (MODIFY_EXPR, | |
1709 | TREE_TYPE (DECL_RESULT (current_function_decl)), | |
1710 | DECL_RESULT (current_function_decl), tmp); | |
1711 | tmp = build1_v (RETURN_EXPR, tmp); | |
1712 | } | |
1b716045 | 1713 | gfc_add_expr_to_block (&body, tmp); |
1714 | ||
1715 | /* Finish off this function and send it for code generation. */ | |
1716 | DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body); | |
1717 | poplevel (1, 0, 1); | |
1718 | BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl; | |
1719 | ||
1720 | /* Output the GENERIC tree. */ | |
1721 | dump_function (TDI_original, thunk_fndecl); | |
1722 | ||
1723 | /* Store the end of the function, so that we get good line number | |
1724 | info for the epilogue. */ | |
1725 | cfun->function_end_locus = input_location; | |
1726 | ||
1727 | /* We're leaving the context of this function, so zap cfun. | |
1728 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in | |
1729 | tree_rest_of_compilation. */ | |
1730 | cfun = NULL; | |
1731 | ||
1732 | current_function_decl = NULL_TREE; | |
1733 | ||
1734 | gfc_gimplify_function (thunk_fndecl); | |
9d95b2b0 | 1735 | cgraph_finalize_function (thunk_fndecl, false); |
1b716045 | 1736 | |
1737 | /* We share the symbols in the formal argument list with other entry | |
1738 | points and the master function. Clear them so that they are | |
1739 | recreated for each function. */ | |
1740 | for (formal = thunk_sym->formal; formal; formal = formal->next) | |
c6871095 | 1741 | if (formal->sym != NULL) /* Ignore alternate returns. */ |
1742 | { | |
1743 | formal->sym->backend_decl = NULL_TREE; | |
1744 | if (formal->sym->ts.type == BT_CHARACTER) | |
1745 | formal->sym->ts.cl->backend_decl = NULL_TREE; | |
1746 | } | |
1747 | ||
1748 | if (thunk_sym->attr.function) | |
1b716045 | 1749 | { |
c6871095 | 1750 | if (thunk_sym->ts.type == BT_CHARACTER) |
1751 | thunk_sym->ts.cl->backend_decl = NULL_TREE; | |
1752 | if (thunk_sym->result->ts.type == BT_CHARACTER) | |
1753 | thunk_sym->result->ts.cl->backend_decl = NULL_TREE; | |
1b716045 | 1754 | } |
1755 | } | |
b31f705b | 1756 | |
1757 | gfc_set_backend_locus (&old_loc); | |
1b716045 | 1758 | } |
1759 | ||
1760 | ||
1761 | /* Create a decl for a function, and create any thunks for alternate entry | |
1762 | points. */ | |
1763 | ||
1764 | void | |
1765 | gfc_create_function_decl (gfc_namespace * ns) | |
1766 | { | |
1767 | /* Create a declaration for the master function. */ | |
1768 | build_function_decl (ns->proc_name); | |
1769 | ||
f888a3fb | 1770 | /* Compile the entry thunks. */ |
1b716045 | 1771 | if (ns->entries) |
1772 | build_entry_thunks (ns); | |
1773 | ||
1774 | /* Now create the read argument list. */ | |
1775 | create_function_arglist (ns->proc_name); | |
1776 | } | |
1777 | ||
c750cc52 | 1778 | /* Return the decl used to hold the function return value. If |
1779 | parent_flag is set, the context is the parent_scope*/ | |
4ee9c684 | 1780 | |
1781 | tree | |
c750cc52 | 1782 | gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag) |
4ee9c684 | 1783 | { |
c750cc52 | 1784 | tree decl; |
1785 | tree length; | |
1786 | tree this_fake_result_decl; | |
1787 | tree this_function_decl; | |
4ee9c684 | 1788 | |
1789 | char name[GFC_MAX_SYMBOL_LEN + 10]; | |
1790 | ||
c750cc52 | 1791 | if (parent_flag) |
1792 | { | |
1793 | this_fake_result_decl = parent_fake_result_decl; | |
1794 | this_function_decl = DECL_CONTEXT (current_function_decl); | |
1795 | } | |
1796 | else | |
1797 | { | |
1798 | this_fake_result_decl = current_fake_result_decl; | |
1799 | this_function_decl = current_function_decl; | |
1800 | } | |
1801 | ||
c6871095 | 1802 | if (sym |
c750cc52 | 1803 | && sym->ns->proc_name->backend_decl == this_function_decl |
d4163395 | 1804 | && sym->ns->proc_name->attr.entry_master |
c6871095 | 1805 | && sym != sym->ns->proc_name) |
1806 | { | |
d4163395 | 1807 | tree t = NULL, var; |
c750cc52 | 1808 | if (this_fake_result_decl != NULL) |
1809 | for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t)) | |
d4163395 | 1810 | if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0) |
1811 | break; | |
1812 | if (t) | |
1813 | return TREE_VALUE (t); | |
c750cc52 | 1814 | decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag); |
1815 | ||
1816 | if (parent_flag) | |
1817 | this_fake_result_decl = parent_fake_result_decl; | |
1818 | else | |
1819 | this_fake_result_decl = current_fake_result_decl; | |
1820 | ||
d4163395 | 1821 | if (decl && sym->ns->proc_name->attr.mixed_entry_master) |
c6871095 | 1822 | { |
1823 | tree field; | |
1824 | ||
1825 | for (field = TYPE_FIELDS (TREE_TYPE (decl)); | |
1826 | field; field = TREE_CHAIN (field)) | |
1827 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), | |
1828 | sym->name) == 0) | |
1829 | break; | |
1830 | ||
1831 | gcc_assert (field != NULL_TREE); | |
1832 | decl = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, | |
1833 | NULL_TREE); | |
1834 | } | |
c750cc52 | 1835 | |
1836 | var = create_tmp_var_raw (TREE_TYPE (decl), sym->name); | |
1837 | if (parent_flag) | |
1838 | gfc_add_decl_to_parent_function (var); | |
1839 | else | |
1840 | gfc_add_decl_to_function (var); | |
1841 | ||
d4163395 | 1842 | SET_DECL_VALUE_EXPR (var, decl); |
1843 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
2cf330c4 | 1844 | GFC_DECL_RESULT (var) = 1; |
c750cc52 | 1845 | |
1846 | TREE_CHAIN (this_fake_result_decl) | |
1847 | = tree_cons (get_identifier (sym->name), var, | |
1848 | TREE_CHAIN (this_fake_result_decl)); | |
d4163395 | 1849 | return var; |
c6871095 | 1850 | } |
1851 | ||
c750cc52 | 1852 | if (this_fake_result_decl != NULL_TREE) |
1853 | return TREE_VALUE (this_fake_result_decl); | |
4ee9c684 | 1854 | |
1855 | /* Only when gfc_get_fake_result_decl is called by gfc_trans_return, | |
1856 | sym is NULL. */ | |
1857 | if (!sym) | |
1858 | return NULL_TREE; | |
1859 | ||
d4163395 | 1860 | if (sym->ts.type == BT_CHARACTER) |
4ee9c684 | 1861 | { |
d4163395 | 1862 | if (sym->ts.cl->backend_decl == NULL_TREE) |
1863 | length = gfc_create_string_length (sym); | |
1864 | else | |
1865 | length = sym->ts.cl->backend_decl; | |
1866 | if (TREE_CODE (length) == VAR_DECL | |
1867 | && DECL_CONTEXT (length) == NULL_TREE) | |
99042714 | 1868 | gfc_add_decl_to_function (length); |
4ee9c684 | 1869 | } |
1870 | ||
1871 | if (gfc_return_by_reference (sym)) | |
1872 | { | |
c750cc52 | 1873 | decl = DECL_ARGUMENTS (this_function_decl); |
c6871095 | 1874 | |
c750cc52 | 1875 | if (sym->ns->proc_name->backend_decl == this_function_decl |
c6871095 | 1876 | && sym->ns->proc_name->attr.entry_master) |
1877 | decl = TREE_CHAIN (decl); | |
4ee9c684 | 1878 | |
1879 | TREE_USED (decl) = 1; | |
1880 | if (sym->as) | |
1881 | decl = gfc_build_dummy_array_decl (sym, decl); | |
1882 | } | |
1883 | else | |
1884 | { | |
1885 | sprintf (name, "__result_%.20s", | |
c750cc52 | 1886 | IDENTIFIER_POINTER (DECL_NAME (this_function_decl))); |
4ee9c684 | 1887 | |
1888 | decl = build_decl (VAR_DECL, get_identifier (name), | |
c750cc52 | 1889 | TREE_TYPE (TREE_TYPE (this_function_decl))); |
4ee9c684 | 1890 | |
1891 | DECL_ARTIFICIAL (decl) = 1; | |
1892 | DECL_EXTERNAL (decl) = 0; | |
1893 | TREE_PUBLIC (decl) = 0; | |
1894 | TREE_USED (decl) = 1; | |
764f1175 | 1895 | GFC_DECL_RESULT (decl) = 1; |
a379e3a9 | 1896 | TREE_ADDRESSABLE (decl) = 1; |
4ee9c684 | 1897 | |
1898 | layout_decl (decl, 0); | |
1899 | ||
c750cc52 | 1900 | if (parent_flag) |
1901 | gfc_add_decl_to_parent_function (decl); | |
1902 | else | |
1903 | gfc_add_decl_to_function (decl); | |
4ee9c684 | 1904 | } |
1905 | ||
c750cc52 | 1906 | if (parent_flag) |
1907 | parent_fake_result_decl = build_tree_list (NULL, decl); | |
1908 | else | |
1909 | current_fake_result_decl = build_tree_list (NULL, decl); | |
4ee9c684 | 1910 | |
1911 | return decl; | |
1912 | } | |
1913 | ||
1914 | ||
1915 | /* Builds a function decl. The remaining parameters are the types of the | |
1916 | function arguments. Negative nargs indicates a varargs function. */ | |
1917 | ||
1918 | tree | |
1919 | gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...) | |
1920 | { | |
1921 | tree arglist; | |
1922 | tree argtype; | |
1923 | tree fntype; | |
1924 | tree fndecl; | |
1925 | va_list p; | |
1926 | int n; | |
1927 | ||
1928 | /* Library functions must be declared with global scope. */ | |
22d678e8 | 1929 | gcc_assert (current_function_decl == NULL_TREE); |
4ee9c684 | 1930 | |
1931 | va_start (p, nargs); | |
1932 | ||
1933 | ||
1934 | /* Create a list of the argument types. */ | |
1935 | for (arglist = NULL_TREE, n = abs (nargs); n > 0; n--) | |
1936 | { | |
1937 | argtype = va_arg (p, tree); | |
1938 | arglist = gfc_chainon_list (arglist, argtype); | |
1939 | } | |
1940 | ||
1941 | if (nargs >= 0) | |
1942 | { | |
1943 | /* Terminate the list. */ | |
1944 | arglist = gfc_chainon_list (arglist, void_type_node); | |
1945 | } | |
1946 | ||
1947 | /* Build the function type and decl. */ | |
1948 | fntype = build_function_type (rettype, arglist); | |
1949 | fndecl = build_decl (FUNCTION_DECL, name, fntype); | |
1950 | ||
1951 | /* Mark this decl as external. */ | |
1952 | DECL_EXTERNAL (fndecl) = 1; | |
1953 | TREE_PUBLIC (fndecl) = 1; | |
1954 | ||
1955 | va_end (p); | |
1956 | ||
1957 | pushdecl (fndecl); | |
1958 | ||
b2c4af5e | 1959 | rest_of_decl_compilation (fndecl, 1, 0); |
4ee9c684 | 1960 | |
1961 | return fndecl; | |
1962 | } | |
1963 | ||
1964 | static void | |
1965 | gfc_build_intrinsic_function_decls (void) | |
1966 | { | |
90ba9145 | 1967 | tree gfc_int4_type_node = gfc_get_int_type (4); |
1968 | tree gfc_int8_type_node = gfc_get_int_type (8); | |
920e54ef | 1969 | tree gfc_int16_type_node = gfc_get_int_type (16); |
90ba9145 | 1970 | tree gfc_logical4_type_node = gfc_get_logical_type (4); |
1971 | tree gfc_real4_type_node = gfc_get_real_type (4); | |
1972 | tree gfc_real8_type_node = gfc_get_real_type (8); | |
920e54ef | 1973 | tree gfc_real10_type_node = gfc_get_real_type (10); |
1974 | tree gfc_real16_type_node = gfc_get_real_type (16); | |
90ba9145 | 1975 | tree gfc_complex4_type_node = gfc_get_complex_type (4); |
1976 | tree gfc_complex8_type_node = gfc_get_complex_type (8); | |
920e54ef | 1977 | tree gfc_complex10_type_node = gfc_get_complex_type (10); |
1978 | tree gfc_complex16_type_node = gfc_get_complex_type (16); | |
dbc97b88 | 1979 | tree gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind); |
90ba9145 | 1980 | |
4ee9c684 | 1981 | /* String functions. */ |
4ee9c684 | 1982 | gfor_fndecl_compare_string = |
1983 | gfc_build_library_function_decl (get_identifier (PREFIX("compare_string")), | |
1984 | gfc_int4_type_node, | |
1985 | 4, | |
9ad09405 | 1986 | gfc_charlen_type_node, pchar_type_node, |
1987 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 1988 | |
1989 | gfor_fndecl_concat_string = | |
1990 | gfc_build_library_function_decl (get_identifier (PREFIX("concat_string")), | |
1991 | void_type_node, | |
1992 | 6, | |
9ad09405 | 1993 | gfc_charlen_type_node, pchar_type_node, |
1994 | gfc_charlen_type_node, pchar_type_node, | |
1995 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 1996 | |
1997 | gfor_fndecl_string_len_trim = | |
1998 | gfc_build_library_function_decl (get_identifier (PREFIX("string_len_trim")), | |
1999 | gfc_int4_type_node, | |
9ad09405 | 2000 | 2, gfc_charlen_type_node, |
4ee9c684 | 2001 | pchar_type_node); |
2002 | ||
2003 | gfor_fndecl_string_index = | |
2004 | gfc_build_library_function_decl (get_identifier (PREFIX("string_index")), | |
2005 | gfc_int4_type_node, | |
9ad09405 | 2006 | 5, gfc_charlen_type_node, pchar_type_node, |
2007 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 2008 | gfc_logical4_type_node); |
2009 | ||
2010 | gfor_fndecl_string_scan = | |
2011 | gfc_build_library_function_decl (get_identifier (PREFIX("string_scan")), | |
2012 | gfc_int4_type_node, | |
9ad09405 | 2013 | 5, gfc_charlen_type_node, pchar_type_node, |
2014 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 2015 | gfc_logical4_type_node); |
2016 | ||
2017 | gfor_fndecl_string_verify = | |
2018 | gfc_build_library_function_decl (get_identifier (PREFIX("string_verify")), | |
2019 | gfc_int4_type_node, | |
9ad09405 | 2020 | 5, gfc_charlen_type_node, pchar_type_node, |
2021 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 2022 | gfc_logical4_type_node); |
2023 | ||
2024 | gfor_fndecl_string_trim = | |
2025 | gfc_build_library_function_decl (get_identifier (PREFIX("string_trim")), | |
2026 | void_type_node, | |
2027 | 4, | |
9ad09405 | 2028 | build_pointer_type (gfc_charlen_type_node), |
4ee9c684 | 2029 | ppvoid_type_node, |
9ad09405 | 2030 | gfc_charlen_type_node, |
4ee9c684 | 2031 | pchar_type_node); |
2032 | ||
2033 | gfor_fndecl_string_repeat = | |
2034 | gfc_build_library_function_decl (get_identifier (PREFIX("string_repeat")), | |
2035 | void_type_node, | |
2036 | 4, | |
2037 | pchar_type_node, | |
9ad09405 | 2038 | gfc_charlen_type_node, |
4ee9c684 | 2039 | pchar_type_node, |
2040 | gfc_int4_type_node); | |
2041 | ||
dbc97b88 | 2042 | gfor_fndecl_ttynam = |
2043 | gfc_build_library_function_decl (get_identifier (PREFIX("ttynam")), | |
2044 | void_type_node, | |
2045 | 3, | |
2046 | pchar_type_node, | |
2047 | gfc_charlen_type_node, | |
2048 | gfc_c_int_type_node); | |
2049 | ||
b902b078 | 2050 | gfor_fndecl_fdate = |
2051 | gfc_build_library_function_decl (get_identifier (PREFIX("fdate")), | |
2052 | void_type_node, | |
2053 | 2, | |
2054 | pchar_type_node, | |
2055 | gfc_charlen_type_node); | |
2056 | ||
2057 | gfor_fndecl_ctime = | |
2058 | gfc_build_library_function_decl (get_identifier (PREFIX("ctime")), | |
2059 | void_type_node, | |
2060 | 3, | |
2061 | pchar_type_node, | |
2062 | gfc_charlen_type_node, | |
2063 | gfc_int8_type_node); | |
2064 | ||
4ee9c684 | 2065 | gfor_fndecl_adjustl = |
2066 | gfc_build_library_function_decl (get_identifier (PREFIX("adjustl")), | |
2067 | void_type_node, | |
2068 | 3, | |
2069 | pchar_type_node, | |
9ad09405 | 2070 | gfc_charlen_type_node, pchar_type_node); |
4ee9c684 | 2071 | |
2072 | gfor_fndecl_adjustr = | |
2073 | gfc_build_library_function_decl (get_identifier (PREFIX("adjustr")), | |
2074 | void_type_node, | |
2075 | 3, | |
2076 | pchar_type_node, | |
9ad09405 | 2077 | gfc_charlen_type_node, pchar_type_node); |
4ee9c684 | 2078 | |
2079 | gfor_fndecl_si_kind = | |
2080 | gfc_build_library_function_decl (get_identifier ("selected_int_kind"), | |
2081 | gfc_int4_type_node, | |
2082 | 1, | |
2083 | pvoid_type_node); | |
2084 | ||
2085 | gfor_fndecl_sr_kind = | |
2086 | gfc_build_library_function_decl (get_identifier ("selected_real_kind"), | |
2087 | gfc_int4_type_node, | |
2088 | 2, pvoid_type_node, | |
2089 | pvoid_type_node); | |
2090 | ||
4ee9c684 | 2091 | /* Power functions. */ |
76834664 | 2092 | { |
920e54ef | 2093 | tree ctype, rtype, itype, jtype; |
2094 | int rkind, ikind, jkind; | |
2095 | #define NIKINDS 3 | |
2096 | #define NRKINDS 4 | |
2097 | static int ikinds[NIKINDS] = {4, 8, 16}; | |
2098 | static int rkinds[NRKINDS] = {4, 8, 10, 16}; | |
2099 | char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */ | |
2100 | ||
2101 | for (ikind=0; ikind < NIKINDS; ikind++) | |
76834664 | 2102 | { |
920e54ef | 2103 | itype = gfc_get_int_type (ikinds[ikind]); |
2104 | ||
2105 | for (jkind=0; jkind < NIKINDS; jkind++) | |
2106 | { | |
2107 | jtype = gfc_get_int_type (ikinds[jkind]); | |
2108 | if (itype && jtype) | |
2109 | { | |
2110 | sprintf(name, PREFIX("pow_i%d_i%d"), ikinds[ikind], | |
2111 | ikinds[jkind]); | |
2112 | gfor_fndecl_math_powi[jkind][ikind].integer = | |
2113 | gfc_build_library_function_decl (get_identifier (name), | |
2114 | jtype, 2, jtype, itype); | |
2177d98b | 2115 | TREE_READONLY (gfor_fndecl_math_powi[jkind][ikind].integer) = 1; |
920e54ef | 2116 | } |
2117 | } | |
2118 | ||
2119 | for (rkind = 0; rkind < NRKINDS; rkind ++) | |
76834664 | 2120 | { |
920e54ef | 2121 | rtype = gfc_get_real_type (rkinds[rkind]); |
2122 | if (rtype && itype) | |
2123 | { | |
2124 | sprintf(name, PREFIX("pow_r%d_i%d"), rkinds[rkind], | |
2125 | ikinds[ikind]); | |
2126 | gfor_fndecl_math_powi[rkind][ikind].real = | |
2127 | gfc_build_library_function_decl (get_identifier (name), | |
2128 | rtype, 2, rtype, itype); | |
2177d98b | 2129 | TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].real) = 1; |
920e54ef | 2130 | } |
2131 | ||
2132 | ctype = gfc_get_complex_type (rkinds[rkind]); | |
2133 | if (ctype && itype) | |
2134 | { | |
2135 | sprintf(name, PREFIX("pow_c%d_i%d"), rkinds[rkind], | |
2136 | ikinds[ikind]); | |
2137 | gfor_fndecl_math_powi[rkind][ikind].cmplx = | |
2138 | gfc_build_library_function_decl (get_identifier (name), | |
2139 | ctype, 2,ctype, itype); | |
2177d98b | 2140 | TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1; |
920e54ef | 2141 | } |
76834664 | 2142 | } |
2143 | } | |
920e54ef | 2144 | #undef NIKINDS |
2145 | #undef NRKINDS | |
76834664 | 2146 | } |
2147 | ||
4ee9c684 | 2148 | gfor_fndecl_math_cpowf = |
2149 | gfc_build_library_function_decl (get_identifier ("cpowf"), | |
2150 | gfc_complex4_type_node, | |
2151 | 1, gfc_complex4_type_node); | |
2152 | gfor_fndecl_math_cpow = | |
2153 | gfc_build_library_function_decl (get_identifier ("cpow"), | |
2154 | gfc_complex8_type_node, | |
2155 | 1, gfc_complex8_type_node); | |
920e54ef | 2156 | if (gfc_complex10_type_node) |
2157 | gfor_fndecl_math_cpowl10 = | |
2158 | gfc_build_library_function_decl (get_identifier ("cpowl"), | |
2159 | gfc_complex10_type_node, 1, | |
2160 | gfc_complex10_type_node); | |
2161 | if (gfc_complex16_type_node) | |
2162 | gfor_fndecl_math_cpowl16 = | |
2163 | gfc_build_library_function_decl (get_identifier ("cpowl"), | |
2164 | gfc_complex16_type_node, 1, | |
2165 | gfc_complex16_type_node); | |
2166 | ||
4ee9c684 | 2167 | gfor_fndecl_math_ishftc4 = |
2168 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc4")), | |
2169 | gfc_int4_type_node, | |
2170 | 3, gfc_int4_type_node, | |
2171 | gfc_int4_type_node, gfc_int4_type_node); | |
2172 | gfor_fndecl_math_ishftc8 = | |
2173 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc8")), | |
2174 | gfc_int8_type_node, | |
2175 | 3, gfc_int8_type_node, | |
920e54ef | 2176 | gfc_int4_type_node, gfc_int4_type_node); |
2177 | if (gfc_int16_type_node) | |
2178 | gfor_fndecl_math_ishftc16 = | |
2179 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc16")), | |
2180 | gfc_int16_type_node, 3, | |
2181 | gfc_int16_type_node, | |
2182 | gfc_int4_type_node, | |
2183 | gfc_int4_type_node); | |
2184 | ||
4ee9c684 | 2185 | gfor_fndecl_math_exponent4 = |
2186 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r4")), | |
2187 | gfc_int4_type_node, | |
2188 | 1, gfc_real4_type_node); | |
2189 | gfor_fndecl_math_exponent8 = | |
2190 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r8")), | |
2191 | gfc_int4_type_node, | |
2192 | 1, gfc_real8_type_node); | |
920e54ef | 2193 | if (gfc_real10_type_node) |
2194 | gfor_fndecl_math_exponent10 = | |
2195 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r10")), | |
2196 | gfc_int4_type_node, 1, | |
2197 | gfc_real10_type_node); | |
2198 | if (gfc_real16_type_node) | |
2199 | gfor_fndecl_math_exponent16 = | |
2200 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r16")), | |
2201 | gfc_int4_type_node, 1, | |
2202 | gfc_real16_type_node); | |
4ee9c684 | 2203 | |
4e8e57b0 | 2204 | /* BLAS functions. */ |
2205 | { | |
2206 | tree pint = build_pointer_type (gfc_c_int_type_node); | |
2207 | tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind)); | |
2208 | tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind)); | |
2209 | tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind)); | |
2210 | tree pz = build_pointer_type | |
2211 | (gfc_get_complex_type (gfc_default_double_kind)); | |
2212 | ||
2213 | gfor_fndecl_sgemm = gfc_build_library_function_decl | |
2214 | (get_identifier | |
2215 | (gfc_option.flag_underscoring ? "sgemm_" | |
2216 | : "sgemm"), | |
2217 | void_type_node, 15, pchar_type_node, | |
2218 | pchar_type_node, pint, pint, pint, ps, ps, pint, | |
2219 | ps, pint, ps, ps, pint, gfc_c_int_type_node, | |
2220 | gfc_c_int_type_node); | |
2221 | gfor_fndecl_dgemm = gfc_build_library_function_decl | |
2222 | (get_identifier | |
2223 | (gfc_option.flag_underscoring ? "dgemm_" | |
2224 | : "dgemm"), | |
2225 | void_type_node, 15, pchar_type_node, | |
2226 | pchar_type_node, pint, pint, pint, pd, pd, pint, | |
2227 | pd, pint, pd, pd, pint, gfc_c_int_type_node, | |
2228 | gfc_c_int_type_node); | |
2229 | gfor_fndecl_cgemm = gfc_build_library_function_decl | |
2230 | (get_identifier | |
2231 | (gfc_option.flag_underscoring ? "cgemm_" | |
2232 | : "cgemm"), | |
2233 | void_type_node, 15, pchar_type_node, | |
2234 | pchar_type_node, pint, pint, pint, pc, pc, pint, | |
2235 | pc, pint, pc, pc, pint, gfc_c_int_type_node, | |
2236 | gfc_c_int_type_node); | |
2237 | gfor_fndecl_zgemm = gfc_build_library_function_decl | |
2238 | (get_identifier | |
2239 | (gfc_option.flag_underscoring ? "zgemm_" | |
2240 | : "zgemm"), | |
2241 | void_type_node, 15, pchar_type_node, | |
2242 | pchar_type_node, pint, pint, pint, pz, pz, pint, | |
2243 | pz, pint, pz, pz, pint, gfc_c_int_type_node, | |
2244 | gfc_c_int_type_node); | |
2245 | } | |
2246 | ||
4ee9c684 | 2247 | /* Other functions. */ |
2248 | gfor_fndecl_size0 = | |
2249 | gfc_build_library_function_decl (get_identifier (PREFIX("size0")), | |
2250 | gfc_array_index_type, | |
2251 | 1, pvoid_type_node); | |
2252 | gfor_fndecl_size1 = | |
2253 | gfc_build_library_function_decl (get_identifier (PREFIX("size1")), | |
2254 | gfc_array_index_type, | |
2255 | 2, pvoid_type_node, | |
2256 | gfc_array_index_type); | |
9b057c29 | 2257 | |
2258 | gfor_fndecl_iargc = | |
2259 | gfc_build_library_function_decl (get_identifier (PREFIX ("iargc")), | |
2260 | gfc_int4_type_node, | |
2261 | 0); | |
4ee9c684 | 2262 | } |
2263 | ||
2264 | ||
2265 | /* Make prototypes for runtime library functions. */ | |
2266 | ||
2267 | void | |
2268 | gfc_build_builtin_function_decls (void) | |
2269 | { | |
8c84a5de | 2270 | tree gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind); |
90ba9145 | 2271 | tree gfc_int4_type_node = gfc_get_int_type (4); |
2272 | tree gfc_int8_type_node = gfc_get_int_type (8); | |
2273 | tree gfc_logical4_type_node = gfc_get_logical_type (4); | |
8302a4a2 | 2274 | tree gfc_pint4_type_node = build_pointer_type (gfc_int4_type_node); |
90ba9145 | 2275 | |
9c0f3811 | 2276 | /* Treat these two internal malloc wrappers as malloc. */ |
4ee9c684 | 2277 | gfor_fndecl_internal_malloc = |
2278 | gfc_build_library_function_decl (get_identifier (PREFIX("internal_malloc")), | |
2279 | pvoid_type_node, 1, gfc_int4_type_node); | |
9c0f3811 | 2280 | DECL_IS_MALLOC (gfor_fndecl_internal_malloc) = 1; |
4ee9c684 | 2281 | |
2282 | gfor_fndecl_internal_malloc64 = | |
2283 | gfc_build_library_function_decl (get_identifier | |
2284 | (PREFIX("internal_malloc64")), | |
2285 | pvoid_type_node, 1, gfc_int8_type_node); | |
9c0f3811 | 2286 | DECL_IS_MALLOC (gfor_fndecl_internal_malloc64) = 1; |
4ee9c684 | 2287 | |
9e1839e2 | 2288 | gfor_fndecl_internal_realloc = |
2289 | gfc_build_library_function_decl (get_identifier | |
2290 | (PREFIX("internal_realloc")), | |
2291 | pvoid_type_node, 2, pvoid_type_node, | |
2292 | gfc_int4_type_node); | |
2293 | ||
2294 | gfor_fndecl_internal_realloc64 = | |
2295 | gfc_build_library_function_decl (get_identifier | |
2296 | (PREFIX("internal_realloc64")), | |
2297 | pvoid_type_node, 2, pvoid_type_node, | |
2298 | gfc_int8_type_node); | |
2299 | ||
4ee9c684 | 2300 | gfor_fndecl_internal_free = |
2301 | gfc_build_library_function_decl (get_identifier (PREFIX("internal_free")), | |
2302 | void_type_node, 1, pvoid_type_node); | |
2303 | ||
2304 | gfor_fndecl_allocate = | |
2305 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate")), | |
2306 | void_type_node, 2, ppvoid_type_node, | |
2307 | gfc_int4_type_node); | |
2308 | ||
2309 | gfor_fndecl_allocate64 = | |
2310 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate64")), | |
2311 | void_type_node, 2, ppvoid_type_node, | |
2312 | gfc_int8_type_node); | |
2313 | ||
8a92488f | 2314 | gfor_fndecl_allocate_array = |
2315 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate_array")), | |
2316 | void_type_node, 2, ppvoid_type_node, | |
2317 | gfc_int4_type_node); | |
2318 | ||
2319 | gfor_fndecl_allocate64_array = | |
2320 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate64_array")), | |
2321 | void_type_node, 2, ppvoid_type_node, | |
2322 | gfc_int8_type_node); | |
2323 | ||
4ee9c684 | 2324 | gfor_fndecl_deallocate = |
2325 | gfc_build_library_function_decl (get_identifier (PREFIX("deallocate")), | |
8302a4a2 | 2326 | void_type_node, 2, ppvoid_type_node, |
2327 | gfc_pint4_type_node); | |
4ee9c684 | 2328 | |
2329 | gfor_fndecl_stop_numeric = | |
2330 | gfc_build_library_function_decl (get_identifier (PREFIX("stop_numeric")), | |
2331 | void_type_node, 1, gfc_int4_type_node); | |
2332 | ||
98ccec97 | 2333 | /* Stop doesn't return. */ |
2334 | TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1; | |
2335 | ||
4ee9c684 | 2336 | gfor_fndecl_stop_string = |
2337 | gfc_build_library_function_decl (get_identifier (PREFIX("stop_string")), | |
2338 | void_type_node, 2, pchar_type_node, | |
2339 | gfc_int4_type_node); | |
98ccec97 | 2340 | /* Stop doesn't return. */ |
2341 | TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1; | |
4ee9c684 | 2342 | |
2343 | gfor_fndecl_pause_numeric = | |
2344 | gfc_build_library_function_decl (get_identifier (PREFIX("pause_numeric")), | |
2345 | void_type_node, 1, gfc_int4_type_node); | |
2346 | ||
2347 | gfor_fndecl_pause_string = | |
2348 | gfc_build_library_function_decl (get_identifier (PREFIX("pause_string")), | |
2349 | void_type_node, 2, pchar_type_node, | |
2350 | gfc_int4_type_node); | |
2351 | ||
2352 | gfor_fndecl_select_string = | |
2353 | gfc_build_library_function_decl (get_identifier (PREFIX("select_string")), | |
2354 | pvoid_type_node, 0); | |
2355 | ||
2356 | gfor_fndecl_runtime_error = | |
2357 | gfc_build_library_function_decl (get_identifier (PREFIX("runtime_error")), | |
97c2a00c | 2358 | void_type_node, 1, pchar_type_node); |
9c0f3811 | 2359 | /* The runtime_error function does not return. */ |
2360 | TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1; | |
4ee9c684 | 2361 | |
8c84a5de | 2362 | gfor_fndecl_set_fpe = |
2363 | gfc_build_library_function_decl (get_identifier (PREFIX("set_fpe")), | |
2364 | void_type_node, 1, gfc_c_int_type_node); | |
2365 | ||
64fc3c4c | 2366 | gfor_fndecl_set_std = |
2367 | gfc_build_library_function_decl (get_identifier (PREFIX("set_std")), | |
2368 | void_type_node, | |
7833ddd7 | 2369 | 3, |
2370 | gfc_int4_type_node, | |
64fc3c4c | 2371 | gfc_int4_type_node, |
2372 | gfc_int4_type_node); | |
2373 | ||
15774a8b | 2374 | gfor_fndecl_set_convert = |
2375 | gfc_build_library_function_decl (get_identifier (PREFIX("set_convert")), | |
2376 | void_type_node, 1, gfc_c_int_type_node); | |
2377 | ||
f23886ab | 2378 | gfor_fndecl_set_record_marker = |
2379 | gfc_build_library_function_decl (get_identifier (PREFIX("set_record_marker")), | |
2380 | void_type_node, 1, gfc_c_int_type_node); | |
2381 | ||
4ee9c684 | 2382 | gfor_fndecl_in_pack = gfc_build_library_function_decl ( |
2383 | get_identifier (PREFIX("internal_pack")), | |
2384 | pvoid_type_node, 1, pvoid_type_node); | |
2385 | ||
2386 | gfor_fndecl_in_unpack = gfc_build_library_function_decl ( | |
2387 | get_identifier (PREFIX("internal_unpack")), | |
2388 | pvoid_type_node, 1, pvoid_type_node); | |
2389 | ||
2390 | gfor_fndecl_associated = | |
2391 | gfc_build_library_function_decl ( | |
2392 | get_identifier (PREFIX("associated")), | |
2393 | gfc_logical4_type_node, | |
2394 | 2, | |
2395 | ppvoid_type_node, | |
2396 | ppvoid_type_node); | |
2397 | ||
2398 | gfc_build_intrinsic_function_decls (); | |
2399 | gfc_build_intrinsic_lib_fndecls (); | |
2400 | gfc_build_io_library_fndecls (); | |
2401 | } | |
2402 | ||
2403 | ||
231e961a | 2404 | /* Evaluate the length of dummy character variables. */ |
4ee9c684 | 2405 | |
2406 | static tree | |
d4163395 | 2407 | gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl, tree fnbody) |
4ee9c684 | 2408 | { |
2409 | stmtblock_t body; | |
2410 | ||
2411 | gfc_finish_decl (cl->backend_decl, NULL_TREE); | |
2412 | ||
2413 | gfc_start_block (&body); | |
2414 | ||
2415 | /* Evaluate the string length expression. */ | |
2416 | gfc_trans_init_string_length (cl, &body); | |
d4163395 | 2417 | |
2418 | gfc_trans_vla_type_sizes (sym, &body); | |
2419 | ||
4ee9c684 | 2420 | gfc_add_expr_to_block (&body, fnbody); |
2421 | return gfc_finish_block (&body); | |
2422 | } | |
2423 | ||
2424 | ||
2425 | /* Allocate and cleanup an automatic character variable. */ | |
2426 | ||
2427 | static tree | |
2428 | gfc_trans_auto_character_variable (gfc_symbol * sym, tree fnbody) | |
2429 | { | |
2430 | stmtblock_t body; | |
2431 | tree decl; | |
4ee9c684 | 2432 | tree tmp; |
2433 | ||
22d678e8 | 2434 | gcc_assert (sym->backend_decl); |
2435 | gcc_assert (sym->ts.cl && sym->ts.cl->length); | |
4ee9c684 | 2436 | |
2437 | gfc_start_block (&body); | |
2438 | ||
2439 | /* Evaluate the string length expression. */ | |
2440 | gfc_trans_init_string_length (sym->ts.cl, &body); | |
2441 | ||
d4163395 | 2442 | gfc_trans_vla_type_sizes (sym, &body); |
2443 | ||
4ee9c684 | 2444 | decl = sym->backend_decl; |
2445 | ||
afcf285e | 2446 | /* Emit a DECL_EXPR for this variable, which will cause the |
4b3a701c | 2447 | gimplifier to allocate storage, and all that good stuff. */ |
ed52ef8b | 2448 | tmp = build1 (DECL_EXPR, TREE_TYPE (decl), decl); |
4ee9c684 | 2449 | gfc_add_expr_to_block (&body, tmp); |
afcf285e | 2450 | |
4ee9c684 | 2451 | gfc_add_expr_to_block (&body, fnbody); |
2452 | return gfc_finish_block (&body); | |
2453 | } | |
2454 | ||
c8f1568f | 2455 | /* Set the initial value of ASSIGN statement auxiliary variable explicitly. */ |
2456 | ||
2457 | static tree | |
2458 | gfc_trans_assign_aux_var (gfc_symbol * sym, tree fnbody) | |
2459 | { | |
2460 | stmtblock_t body; | |
2461 | ||
2462 | gcc_assert (sym->backend_decl); | |
2463 | gfc_start_block (&body); | |
2464 | ||
2465 | /* Set the initial value to length. See the comments in | |
2466 | function gfc_add_assign_aux_vars in this file. */ | |
2467 | gfc_add_modify_expr (&body, GFC_DECL_STRING_LEN (sym->backend_decl), | |
2468 | build_int_cst (NULL_TREE, -2)); | |
2469 | ||
2470 | gfc_add_expr_to_block (&body, fnbody); | |
2471 | return gfc_finish_block (&body); | |
2472 | } | |
2473 | ||
d4163395 | 2474 | static void |
2475 | gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body) | |
2476 | { | |
2477 | tree t = *tp, var, val; | |
2478 | ||
2479 | if (t == NULL || t == error_mark_node) | |
2480 | return; | |
2481 | if (TREE_CONSTANT (t) || DECL_P (t)) | |
2482 | return; | |
2483 | ||
2484 | if (TREE_CODE (t) == SAVE_EXPR) | |
2485 | { | |
2486 | if (SAVE_EXPR_RESOLVED_P (t)) | |
2487 | { | |
2488 | *tp = TREE_OPERAND (t, 0); | |
2489 | return; | |
2490 | } | |
2491 | val = TREE_OPERAND (t, 0); | |
2492 | } | |
2493 | else | |
2494 | val = t; | |
2495 | ||
2496 | var = gfc_create_var_np (TREE_TYPE (t), NULL); | |
2497 | gfc_add_decl_to_function (var); | |
2498 | gfc_add_modify_expr (body, var, val); | |
2499 | if (TREE_CODE (t) == SAVE_EXPR) | |
2500 | TREE_OPERAND (t, 0) = var; | |
2501 | *tp = var; | |
2502 | } | |
2503 | ||
2504 | static void | |
2505 | gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body) | |
2506 | { | |
2507 | tree t; | |
2508 | ||
2509 | if (type == NULL || type == error_mark_node) | |
2510 | return; | |
2511 | ||
2512 | type = TYPE_MAIN_VARIANT (type); | |
2513 | ||
2514 | if (TREE_CODE (type) == INTEGER_TYPE) | |
2515 | { | |
2516 | gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body); | |
2517 | gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body); | |
2518 | ||
2519 | for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
2520 | { | |
2521 | TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type); | |
2522 | TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type); | |
2523 | } | |
2524 | } | |
2525 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
2526 | { | |
2527 | gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body); | |
2528 | gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body); | |
2529 | gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body); | |
2530 | gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body); | |
2531 | ||
2532 | for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
2533 | { | |
2534 | TYPE_SIZE (t) = TYPE_SIZE (type); | |
2535 | TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type); | |
2536 | } | |
2537 | } | |
2538 | } | |
2539 | ||
2540 | /* Make sure all type sizes and array domains are either constant, | |
2541 | or variable or parameter decls. This is a simplified variant | |
2542 | of gimplify_type_sizes, but we can't use it here, as none of the | |
2543 | variables in the expressions have been gimplified yet. | |
2544 | As type sizes and domains for various variable length arrays | |
2545 | contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars | |
2546 | time, without this routine gimplify_type_sizes in the middle-end | |
2547 | could result in the type sizes being gimplified earlier than where | |
2548 | those variables are initialized. */ | |
2549 | ||
2550 | void | |
2551 | gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body) | |
2552 | { | |
2553 | tree type = TREE_TYPE (sym->backend_decl); | |
2554 | ||
2555 | if (TREE_CODE (type) == FUNCTION_TYPE | |
2556 | && (sym->attr.function || sym->attr.result || sym->attr.entry)) | |
2557 | { | |
2558 | if (! current_fake_result_decl) | |
2559 | return; | |
2560 | ||
2561 | type = TREE_TYPE (TREE_VALUE (current_fake_result_decl)); | |
2562 | } | |
2563 | ||
2564 | while (POINTER_TYPE_P (type)) | |
2565 | type = TREE_TYPE (type); | |
2566 | ||
2567 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
2568 | { | |
2569 | tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type); | |
2570 | ||
2571 | while (POINTER_TYPE_P (etype)) | |
2572 | etype = TREE_TYPE (etype); | |
2573 | ||
2574 | gfc_trans_vla_type_sizes_1 (etype, body); | |
2575 | } | |
2576 | ||
2577 | gfc_trans_vla_type_sizes_1 (type, body); | |
2578 | } | |
2579 | ||
4ee9c684 | 2580 | |
2581 | /* Generate function entry and exit code, and add it to the function body. | |
2582 | This includes: | |
f888a3fb | 2583 | Allocation and initialization of array variables. |
4ee9c684 | 2584 | Allocation of character string variables. |
c8f1568f | 2585 | Initialization and possibly repacking of dummy arrays. |
2586 | Initialization of ASSIGN statement auxiliary variable. */ | |
4ee9c684 | 2587 | |
2588 | static tree | |
2589 | gfc_trans_deferred_vars (gfc_symbol * proc_sym, tree fnbody) | |
2590 | { | |
2591 | locus loc; | |
2592 | gfc_symbol *sym; | |
d4163395 | 2593 | gfc_formal_arglist *f; |
2594 | stmtblock_t body; | |
25dd7350 | 2595 | bool seen_trans_deferred_array = false; |
4ee9c684 | 2596 | |
2597 | /* Deal with implicit return variables. Explicit return variables will | |
2598 | already have been added. */ | |
2599 | if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym) | |
2600 | { | |
2601 | if (!current_fake_result_decl) | |
2602 | { | |
c6871095 | 2603 | gfc_entry_list *el = NULL; |
2604 | if (proc_sym->attr.entry_master) | |
2605 | { | |
2606 | for (el = proc_sym->ns->entries; el; el = el->next) | |
2607 | if (el->sym != el->sym->result) | |
2608 | break; | |
2609 | } | |
2610 | if (el == NULL) | |
2611 | warning (0, "Function does not return a value"); | |
4ee9c684 | 2612 | } |
c6871095 | 2613 | else if (proc_sym->as) |
4ee9c684 | 2614 | { |
d4163395 | 2615 | tree result = TREE_VALUE (current_fake_result_decl); |
2616 | fnbody = gfc_trans_dummy_array_bias (proc_sym, result, fnbody); | |
10b07432 | 2617 | |
2618 | /* An automatic character length, pointer array result. */ | |
2619 | if (proc_sym->ts.type == BT_CHARACTER | |
2620 | && TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL) | |
2621 | fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl, | |
2622 | fnbody); | |
4ee9c684 | 2623 | } |
2624 | else if (proc_sym->ts.type == BT_CHARACTER) | |
2625 | { | |
2626 | if (TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL) | |
d4163395 | 2627 | fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl, |
2628 | fnbody); | |
4ee9c684 | 2629 | } |
2630 | else | |
bdaed7d2 | 2631 | gcc_assert (gfc_option.flag_f2c |
2632 | && proc_sym->ts.type == BT_COMPLEX); | |
4ee9c684 | 2633 | } |
2634 | ||
2635 | for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink) | |
2636 | { | |
2294b616 | 2637 | bool sym_has_alloc_comp = (sym->ts.type == BT_DERIVED) |
2638 | && sym->ts.derived->attr.alloc_comp; | |
4ee9c684 | 2639 | if (sym->attr.dimension) |
2640 | { | |
2641 | switch (sym->as->type) | |
2642 | { | |
2643 | case AS_EXPLICIT: | |
2644 | if (sym->attr.dummy || sym->attr.result) | |
2645 | fnbody = | |
2646 | gfc_trans_dummy_array_bias (sym, sym->backend_decl, fnbody); | |
2647 | else if (sym->attr.pointer || sym->attr.allocatable) | |
2648 | { | |
2649 | if (TREE_STATIC (sym->backend_decl)) | |
2650 | gfc_trans_static_array_pointer (sym); | |
2651 | else | |
25dd7350 | 2652 | { |
2653 | seen_trans_deferred_array = true; | |
2654 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
2655 | } | |
4ee9c684 | 2656 | } |
2657 | else | |
2658 | { | |
25dd7350 | 2659 | if (sym_has_alloc_comp) |
2660 | { | |
2661 | seen_trans_deferred_array = true; | |
2662 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
2663 | } | |
2664 | ||
4ee9c684 | 2665 | gfc_get_backend_locus (&loc); |
2666 | gfc_set_backend_locus (&sym->declared_at); | |
2667 | fnbody = gfc_trans_auto_array_allocation (sym->backend_decl, | |
2668 | sym, fnbody); | |
2669 | gfc_set_backend_locus (&loc); | |
2670 | } | |
2671 | break; | |
2672 | ||
2673 | case AS_ASSUMED_SIZE: | |
2674 | /* Must be a dummy parameter. */ | |
22d678e8 | 2675 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 2676 | |
2677 | /* We should always pass assumed size arrays the g77 way. */ | |
4ee9c684 | 2678 | fnbody = gfc_trans_g77_array (sym, fnbody); |
2679 | break; | |
2680 | ||
2681 | case AS_ASSUMED_SHAPE: | |
2682 | /* Must be a dummy parameter. */ | |
22d678e8 | 2683 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 2684 | |
2685 | fnbody = gfc_trans_dummy_array_bias (sym, sym->backend_decl, | |
2686 | fnbody); | |
2687 | break; | |
2688 | ||
2689 | case AS_DEFERRED: | |
25dd7350 | 2690 | seen_trans_deferred_array = true; |
2691 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
4ee9c684 | 2692 | break; |
2693 | ||
2694 | default: | |
22d678e8 | 2695 | gcc_unreachable (); |
4ee9c684 | 2696 | } |
25dd7350 | 2697 | if (sym_has_alloc_comp && !seen_trans_deferred_array) |
2294b616 | 2698 | fnbody = gfc_trans_deferred_array (sym, fnbody); |
4ee9c684 | 2699 | } |
2294b616 | 2700 | else if (sym_has_alloc_comp) |
2701 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
4ee9c684 | 2702 | else if (sym->ts.type == BT_CHARACTER) |
2703 | { | |
2704 | gfc_get_backend_locus (&loc); | |
2705 | gfc_set_backend_locus (&sym->declared_at); | |
2706 | if (sym->attr.dummy || sym->attr.result) | |
d4163395 | 2707 | fnbody = gfc_trans_dummy_character (sym, sym->ts.cl, fnbody); |
4ee9c684 | 2708 | else |
2709 | fnbody = gfc_trans_auto_character_variable (sym, fnbody); | |
2710 | gfc_set_backend_locus (&loc); | |
2711 | } | |
c8f1568f | 2712 | else if (sym->attr.assign) |
2713 | { | |
2714 | gfc_get_backend_locus (&loc); | |
2715 | gfc_set_backend_locus (&sym->declared_at); | |
2716 | fnbody = gfc_trans_assign_aux_var (sym, fnbody); | |
2717 | gfc_set_backend_locus (&loc); | |
2718 | } | |
4ee9c684 | 2719 | else |
22d678e8 | 2720 | gcc_unreachable (); |
4ee9c684 | 2721 | } |
2722 | ||
d4163395 | 2723 | gfc_init_block (&body); |
2724 | ||
2725 | for (f = proc_sym->formal; f; f = f->next) | |
2726 | if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER) | |
2727 | { | |
2728 | gcc_assert (f->sym->ts.cl->backend_decl != NULL); | |
2729 | if (TREE_CODE (f->sym->ts.cl->backend_decl) == PARM_DECL) | |
2730 | gfc_trans_vla_type_sizes (f->sym, &body); | |
2731 | } | |
2732 | ||
2733 | if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER | |
2734 | && current_fake_result_decl != NULL) | |
2735 | { | |
2736 | gcc_assert (proc_sym->ts.cl->backend_decl != NULL); | |
2737 | if (TREE_CODE (proc_sym->ts.cl->backend_decl) == PARM_DECL) | |
2738 | gfc_trans_vla_type_sizes (proc_sym, &body); | |
2739 | } | |
2740 | ||
2741 | gfc_add_expr_to_block (&body, fnbody); | |
2742 | return gfc_finish_block (&body); | |
4ee9c684 | 2743 | } |
2744 | ||
2745 | ||
2746 | /* Output an initialized decl for a module variable. */ | |
2747 | ||
2748 | static void | |
2749 | gfc_create_module_variable (gfc_symbol * sym) | |
2750 | { | |
2751 | tree decl; | |
4ee9c684 | 2752 | |
d77f260f | 2753 | /* Module functions with alternate entries are dealt with later and |
2754 | would get caught by the next condition. */ | |
2755 | if (sym->attr.entry) | |
2756 | return; | |
2757 | ||
4ee9c684 | 2758 | /* Only output symbols from this module. */ |
2759 | if (sym->ns != module_namespace) | |
2760 | { | |
2761 | /* I don't think this should ever happen. */ | |
2762 | internal_error ("module symbol %s in wrong namespace", sym->name); | |
2763 | } | |
2764 | ||
7b3423b9 | 2765 | /* Only output variables and array valued parameters. */ |
4ee9c684 | 2766 | if (sym->attr.flavor != FL_VARIABLE |
2767 | && (sym->attr.flavor != FL_PARAMETER || sym->attr.dimension == 0)) | |
2768 | return; | |
2769 | ||
d43a7f7f | 2770 | /* Don't generate variables from other modules. Variables from |
2771 | COMMONs will already have been generated. */ | |
2772 | if (sym->attr.use_assoc || sym->attr.in_common) | |
4ee9c684 | 2773 | return; |
2774 | ||
2b685f8e | 2775 | /* Equivalenced variables arrive here after creation. */ |
976d903a | 2776 | if (sym->backend_decl |
2777 | && (sym->equiv_built || sym->attr.in_equivalence)) | |
2b685f8e | 2778 | return; |
2779 | ||
4ee9c684 | 2780 | if (sym->backend_decl) |
2781 | internal_error ("backend decl for module variable %s already exists", | |
2782 | sym->name); | |
2783 | ||
2784 | /* We always want module variables to be created. */ | |
2785 | sym->attr.referenced = 1; | |
2786 | /* Create the decl. */ | |
2787 | decl = gfc_get_symbol_decl (sym); | |
2788 | ||
4ee9c684 | 2789 | /* Create the variable. */ |
2790 | pushdecl (decl); | |
b2c4af5e | 2791 | rest_of_decl_compilation (decl, 1, 0); |
4ee9c684 | 2792 | |
2793 | /* Also add length of strings. */ | |
2794 | if (sym->ts.type == BT_CHARACTER) | |
2795 | { | |
2796 | tree length; | |
2797 | ||
2798 | length = sym->ts.cl->backend_decl; | |
2799 | if (!INTEGER_CST_P (length)) | |
2800 | { | |
2801 | pushdecl (length); | |
b2c4af5e | 2802 | rest_of_decl_compilation (length, 1, 0); |
4ee9c684 | 2803 | } |
2804 | } | |
2805 | } | |
2806 | ||
2807 | ||
2808 | /* Generate all the required code for module variables. */ | |
2809 | ||
2810 | void | |
2811 | gfc_generate_module_vars (gfc_namespace * ns) | |
2812 | { | |
2813 | module_namespace = ns; | |
2814 | ||
dfc222eb | 2815 | /* Check if the frontend left the namespace in a reasonable state. */ |
22d678e8 | 2816 | gcc_assert (ns->proc_name && !ns->proc_name->tlink); |
4ee9c684 | 2817 | |
d43a7f7f | 2818 | /* Generate COMMON blocks. */ |
2819 | gfc_trans_common (ns); | |
2820 | ||
dfc222eb | 2821 | /* Create decls for all the module variables. */ |
4ee9c684 | 2822 | gfc_traverse_ns (ns, gfc_create_module_variable); |
2823 | } | |
2824 | ||
2825 | static void | |
2826 | gfc_generate_contained_functions (gfc_namespace * parent) | |
2827 | { | |
2828 | gfc_namespace *ns; | |
2829 | ||
2830 | /* We create all the prototypes before generating any code. */ | |
2831 | for (ns = parent->contained; ns; ns = ns->sibling) | |
2832 | { | |
2833 | /* Skip namespaces from used modules. */ | |
2834 | if (ns->parent != parent) | |
2835 | continue; | |
2836 | ||
1b716045 | 2837 | gfc_create_function_decl (ns); |
4ee9c684 | 2838 | } |
2839 | ||
2840 | for (ns = parent->contained; ns; ns = ns->sibling) | |
2841 | { | |
2842 | /* Skip namespaces from used modules. */ | |
2843 | if (ns->parent != parent) | |
2844 | continue; | |
2845 | ||
2846 | gfc_generate_function_code (ns); | |
2847 | } | |
2848 | } | |
2849 | ||
2850 | ||
d95efb59 | 2851 | /* Drill down through expressions for the array specification bounds and |
2852 | character length calling generate_local_decl for all those variables | |
2853 | that have not already been declared. */ | |
2854 | ||
2855 | static void | |
2856 | generate_local_decl (gfc_symbol *); | |
2857 | ||
2858 | static void | |
2859 | generate_expr_decls (gfc_symbol *sym, gfc_expr *e) | |
2860 | { | |
2861 | gfc_actual_arglist *arg; | |
2862 | gfc_ref *ref; | |
2863 | int i; | |
2864 | ||
2865 | if (e == NULL) | |
2866 | return; | |
2867 | ||
2868 | switch (e->expr_type) | |
2869 | { | |
2870 | case EXPR_FUNCTION: | |
2871 | for (arg = e->value.function.actual; arg; arg = arg->next) | |
2872 | generate_expr_decls (sym, arg->expr); | |
2873 | break; | |
2874 | ||
2875 | /* If the variable is not the same as the dependent, 'sym', and | |
2876 | it is not marked as being declared and it is in the same | |
2877 | namespace as 'sym', add it to the local declarations. */ | |
2878 | case EXPR_VARIABLE: | |
2879 | if (sym == e->symtree->n.sym | |
2880 | || e->symtree->n.sym->mark | |
2881 | || e->symtree->n.sym->ns != sym->ns) | |
2882 | return; | |
2883 | ||
2884 | generate_local_decl (e->symtree->n.sym); | |
2885 | break; | |
2886 | ||
2887 | case EXPR_OP: | |
2888 | generate_expr_decls (sym, e->value.op.op1); | |
2889 | generate_expr_decls (sym, e->value.op.op2); | |
2890 | break; | |
2891 | ||
2892 | default: | |
2893 | break; | |
2894 | } | |
2895 | ||
2896 | if (e->ref) | |
2897 | { | |
2898 | for (ref = e->ref; ref; ref = ref->next) | |
2899 | { | |
2900 | switch (ref->type) | |
2901 | { | |
2902 | case REF_ARRAY: | |
2903 | for (i = 0; i < ref->u.ar.dimen; i++) | |
2904 | { | |
2905 | generate_expr_decls (sym, ref->u.ar.start[i]); | |
2906 | generate_expr_decls (sym, ref->u.ar.end[i]); | |
2907 | generate_expr_decls (sym, ref->u.ar.stride[i]); | |
2908 | } | |
2909 | break; | |
2910 | ||
2911 | case REF_SUBSTRING: | |
2912 | generate_expr_decls (sym, ref->u.ss.start); | |
2913 | generate_expr_decls (sym, ref->u.ss.end); | |
2914 | break; | |
2915 | ||
2916 | case REF_COMPONENT: | |
2917 | if (ref->u.c.component->ts.type == BT_CHARACTER | |
2918 | && ref->u.c.component->ts.cl->length->expr_type | |
2919 | != EXPR_CONSTANT) | |
2920 | generate_expr_decls (sym, ref->u.c.component->ts.cl->length); | |
2921 | ||
2922 | if (ref->u.c.component->as) | |
2923 | for (i = 0; i < ref->u.c.component->as->rank; i++) | |
2924 | { | |
2925 | generate_expr_decls (sym, ref->u.c.component->as->lower[i]); | |
2926 | generate_expr_decls (sym, ref->u.c.component->as->upper[i]); | |
2927 | } | |
2928 | break; | |
2929 | } | |
2930 | } | |
2931 | } | |
2932 | } | |
2933 | ||
2934 | ||
2935 | /* Check for dependencies in the character length and array spec. */ | |
2936 | ||
2937 | static void | |
2938 | generate_dependency_declarations (gfc_symbol *sym) | |
2939 | { | |
2940 | int i; | |
2941 | ||
2942 | if (sym->ts.type == BT_CHARACTER | |
2943 | && sym->ts.cl->length->expr_type != EXPR_CONSTANT) | |
2944 | generate_expr_decls (sym, sym->ts.cl->length); | |
2945 | ||
2946 | if (sym->as && sym->as->rank) | |
2947 | { | |
2948 | for (i = 0; i < sym->as->rank; i++) | |
2949 | { | |
2950 | generate_expr_decls (sym, sym->as->lower[i]); | |
2951 | generate_expr_decls (sym, sym->as->upper[i]); | |
2952 | } | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | ||
4ee9c684 | 2957 | /* Generate decls for all local variables. We do this to ensure correct |
2958 | handling of expressions which only appear in the specification of | |
2959 | other functions. */ | |
2960 | ||
2961 | static void | |
2962 | generate_local_decl (gfc_symbol * sym) | |
2963 | { | |
2964 | if (sym->attr.flavor == FL_VARIABLE) | |
2965 | { | |
d95efb59 | 2966 | /* Check for dependencies in the array specification and string |
2967 | length, adding the necessary declarations to the function. We | |
2968 | mark the symbol now, as well as in traverse_ns, to prevent | |
2969 | getting stuck in a circular dependency. */ | |
2970 | sym->mark = 1; | |
2971 | if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master) | |
2972 | generate_dependency_declarations (sym); | |
2973 | ||
4ee9c684 | 2974 | if (sym->attr.referenced) |
2975 | gfc_get_symbol_decl (sym); | |
14a3addc | 2976 | else if (sym->attr.dummy && warn_unused_parameter) |
d974cfde | 2977 | gfc_warning ("Unused parameter %s declared at %L", sym->name, |
2978 | &sym->declared_at); | |
f888a3fb | 2979 | /* Warn for unused variables, but not if they're inside a common |
14a3addc | 2980 | block or are use-associated. */ |
36609028 | 2981 | else if (warn_unused_variable |
2982 | && !(sym->attr.in_common || sym->attr.use_assoc)) | |
d974cfde | 2983 | gfc_warning ("Unused variable %s declared at %L", sym->name, |
2984 | &sym->declared_at); | |
d4163395 | 2985 | /* For variable length CHARACTER parameters, the PARM_DECL already |
2986 | references the length variable, so force gfc_get_symbol_decl | |
2987 | even when not referenced. If optimize > 0, it will be optimized | |
2988 | away anyway. But do this only after emitting -Wunused-parameter | |
2989 | warning if requested. */ | |
2990 | if (sym->attr.dummy && ! sym->attr.referenced | |
2991 | && sym->ts.type == BT_CHARACTER | |
2992 | && sym->ts.cl->backend_decl != NULL | |
2993 | && TREE_CODE (sym->ts.cl->backend_decl) == VAR_DECL) | |
2994 | { | |
2995 | sym->attr.referenced = 1; | |
2996 | gfc_get_symbol_decl (sym); | |
2997 | } | |
4ee9c684 | 2998 | } |
2999 | } | |
3000 | ||
3001 | static void | |
3002 | generate_local_vars (gfc_namespace * ns) | |
3003 | { | |
3004 | gfc_traverse_ns (ns, generate_local_decl); | |
3005 | } | |
3006 | ||
3007 | ||
1b716045 | 3008 | /* Generate a switch statement to jump to the correct entry point. Also |
3009 | creates the label decls for the entry points. */ | |
4ee9c684 | 3010 | |
1b716045 | 3011 | static tree |
3012 | gfc_trans_entry_master_switch (gfc_entry_list * el) | |
4ee9c684 | 3013 | { |
1b716045 | 3014 | stmtblock_t block; |
3015 | tree label; | |
3016 | tree tmp; | |
3017 | tree val; | |
4ee9c684 | 3018 | |
1b716045 | 3019 | gfc_init_block (&block); |
3020 | for (; el; el = el->next) | |
3021 | { | |
3022 | /* Add the case label. */ | |
b797d6d3 | 3023 | label = gfc_build_label_decl (NULL_TREE); |
7016c612 | 3024 | val = build_int_cst (gfc_array_index_type, el->id); |
ed52ef8b | 3025 | tmp = build3_v (CASE_LABEL_EXPR, val, NULL_TREE, label); |
1b716045 | 3026 | gfc_add_expr_to_block (&block, tmp); |
3027 | ||
3028 | /* And jump to the actual entry point. */ | |
3029 | label = gfc_build_label_decl (NULL_TREE); | |
1b716045 | 3030 | tmp = build1_v (GOTO_EXPR, label); |
3031 | gfc_add_expr_to_block (&block, tmp); | |
3032 | ||
3033 | /* Save the label decl. */ | |
3034 | el->label = label; | |
3035 | } | |
3036 | tmp = gfc_finish_block (&block); | |
3037 | /* The first argument selects the entry point. */ | |
3038 | val = DECL_ARGUMENTS (current_function_decl); | |
ed52ef8b | 3039 | tmp = build3_v (SWITCH_EXPR, val, tmp, NULL_TREE); |
1b716045 | 3040 | return tmp; |
4ee9c684 | 3041 | } |
3042 | ||
6374121b | 3043 | |
4ee9c684 | 3044 | /* Generate code for a function. */ |
3045 | ||
3046 | void | |
3047 | gfc_generate_function_code (gfc_namespace * ns) | |
3048 | { | |
3049 | tree fndecl; | |
3050 | tree old_context; | |
3051 | tree decl; | |
3052 | tree tmp; | |
2294b616 | 3053 | tree tmp2; |
4ee9c684 | 3054 | stmtblock_t block; |
3055 | stmtblock_t body; | |
3056 | tree result; | |
3057 | gfc_symbol *sym; | |
2294b616 | 3058 | int rank; |
4ee9c684 | 3059 | |
3060 | sym = ns->proc_name; | |
1b716045 | 3061 | |
4ee9c684 | 3062 | /* Check that the frontend isn't still using this. */ |
22d678e8 | 3063 | gcc_assert (sym->tlink == NULL); |
4ee9c684 | 3064 | sym->tlink = sym; |
3065 | ||
3066 | /* Create the declaration for functions with global scope. */ | |
3067 | if (!sym->backend_decl) | |
1b716045 | 3068 | gfc_create_function_decl (ns); |
4ee9c684 | 3069 | |
3070 | fndecl = sym->backend_decl; | |
3071 | old_context = current_function_decl; | |
3072 | ||
3073 | if (old_context) | |
3074 | { | |
3075 | push_function_context (); | |
3076 | saved_parent_function_decls = saved_function_decls; | |
3077 | saved_function_decls = NULL_TREE; | |
3078 | } | |
3079 | ||
1b716045 | 3080 | trans_function_start (sym); |
4ee9c684 | 3081 | |
4ee9c684 | 3082 | gfc_start_block (&block); |
3083 | ||
c6871095 | 3084 | if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER) |
3085 | { | |
3086 | /* Copy length backend_decls to all entry point result | |
3087 | symbols. */ | |
3088 | gfc_entry_list *el; | |
3089 | tree backend_decl; | |
3090 | ||
3091 | gfc_conv_const_charlen (ns->proc_name->ts.cl); | |
3092 | backend_decl = ns->proc_name->result->ts.cl->backend_decl; | |
3093 | for (el = ns->entries; el; el = el->next) | |
3094 | el->sym->result->ts.cl->backend_decl = backend_decl; | |
3095 | } | |
3096 | ||
4ee9c684 | 3097 | /* Translate COMMON blocks. */ |
3098 | gfc_trans_common (ns); | |
3099 | ||
c750cc52 | 3100 | /* Null the parent fake result declaration if this namespace is |
3101 | a module function or an external procedures. */ | |
3102 | if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE) | |
3103 | || ns->parent == NULL) | |
3104 | parent_fake_result_decl = NULL_TREE; | |
3105 | ||
2b685f8e | 3106 | gfc_generate_contained_functions (ns); |
3107 | ||
4ee9c684 | 3108 | generate_local_vars (ns); |
669122e7 | 3109 | |
c750cc52 | 3110 | /* Keep the parent fake result declaration in module functions |
3111 | or external procedures. */ | |
3112 | if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE) | |
3113 | || ns->parent == NULL) | |
3114 | current_fake_result_decl = parent_fake_result_decl; | |
3115 | else | |
3116 | current_fake_result_decl = NULL_TREE; | |
3117 | ||
4ee9c684 | 3118 | current_function_return_label = NULL; |
3119 | ||
3120 | /* Now generate the code for the body of this function. */ | |
3121 | gfc_init_block (&body); | |
3122 | ||
7833ddd7 | 3123 | /* If this is the main program, add a call to set_std to set up the |
3124 | runtime library Fortran language standard parameters. */ | |
3125 | ||
3126 | if (sym->attr.is_main_program) | |
64fc3c4c | 3127 | { |
3128 | tree arglist, gfc_int4_type_node; | |
3129 | ||
3130 | gfc_int4_type_node = gfc_get_int_type (4); | |
3131 | arglist = gfc_chainon_list (NULL_TREE, | |
3132 | build_int_cst (gfc_int4_type_node, | |
3133 | gfc_option.warn_std)); | |
3134 | arglist = gfc_chainon_list (arglist, | |
3135 | build_int_cst (gfc_int4_type_node, | |
3136 | gfc_option.allow_std)); | |
7833ddd7 | 3137 | arglist = gfc_chainon_list (arglist, |
3138 | build_int_cst (gfc_int4_type_node, | |
3139 | pedantic)); | |
ac47d547 | 3140 | tmp = build_function_call_expr (gfor_fndecl_set_std, arglist); |
64fc3c4c | 3141 | gfc_add_expr_to_block (&body, tmp); |
3142 | } | |
3143 | ||
8c84a5de | 3144 | /* If this is the main program and a -ffpe-trap option was provided, |
3145 | add a call to set_fpe so that the library will raise a FPE when | |
3146 | needed. */ | |
3147 | if (sym->attr.is_main_program && gfc_option.fpe != 0) | |
3148 | { | |
3149 | tree arglist, gfc_c_int_type_node; | |
3150 | ||
3151 | gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind); | |
3152 | arglist = gfc_chainon_list (NULL_TREE, | |
3153 | build_int_cst (gfc_c_int_type_node, | |
3154 | gfc_option.fpe)); | |
ac47d547 | 3155 | tmp = build_function_call_expr (gfor_fndecl_set_fpe, arglist); |
8c84a5de | 3156 | gfc_add_expr_to_block (&body, tmp); |
3157 | } | |
3158 | ||
15774a8b | 3159 | /* If this is the main program and an -fconvert option was provided, |
3160 | add a call to set_convert. */ | |
3161 | ||
3162 | if (sym->attr.is_main_program && gfc_option.convert != CONVERT_NATIVE) | |
3163 | { | |
3164 | tree arglist, gfc_c_int_type_node; | |
3165 | ||
3166 | gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind); | |
3167 | arglist = gfc_chainon_list (NULL_TREE, | |
3168 | build_int_cst (gfc_c_int_type_node, | |
3169 | gfc_option.convert)); | |
3170 | tmp = build_function_call_expr (gfor_fndecl_set_convert, arglist); | |
3171 | gfc_add_expr_to_block (&body, tmp); | |
3172 | } | |
3173 | ||
f23886ab | 3174 | /* If this is the main program and an -frecord-marker option was provided, |
3175 | add a call to set_record_marker. */ | |
3176 | ||
3177 | if (sym->attr.is_main_program && gfc_option.record_marker != 0) | |
3178 | { | |
3179 | tree arglist, gfc_c_int_type_node; | |
3180 | ||
3181 | gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind); | |
3182 | arglist = gfc_chainon_list (NULL_TREE, | |
3183 | build_int_cst (gfc_c_int_type_node, | |
3184 | gfc_option.record_marker)); | |
3185 | tmp = build_function_call_expr (gfor_fndecl_set_record_marker, arglist); | |
3186 | gfc_add_expr_to_block (&body, tmp); | |
3187 | ||
3188 | } | |
15774a8b | 3189 | |
4ee9c684 | 3190 | if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node |
3191 | && sym->attr.subroutine) | |
3192 | { | |
3193 | tree alternate_return; | |
c750cc52 | 3194 | alternate_return = gfc_get_fake_result_decl (sym, 0); |
4ee9c684 | 3195 | gfc_add_modify_expr (&body, alternate_return, integer_zero_node); |
3196 | } | |
3197 | ||
1b716045 | 3198 | if (ns->entries) |
3199 | { | |
3200 | /* Jump to the correct entry point. */ | |
3201 | tmp = gfc_trans_entry_master_switch (ns->entries); | |
3202 | gfc_add_expr_to_block (&body, tmp); | |
3203 | } | |
3204 | ||
4ee9c684 | 3205 | tmp = gfc_trans_code (ns->code); |
3206 | gfc_add_expr_to_block (&body, tmp); | |
3207 | ||
3208 | /* Add a return label if needed. */ | |
3209 | if (current_function_return_label) | |
3210 | { | |
3211 | tmp = build1_v (LABEL_EXPR, current_function_return_label); | |
3212 | gfc_add_expr_to_block (&body, tmp); | |
3213 | } | |
3214 | ||
3215 | tmp = gfc_finish_block (&body); | |
3216 | /* Add code to create and cleanup arrays. */ | |
3217 | tmp = gfc_trans_deferred_vars (sym, tmp); | |
4ee9c684 | 3218 | |
3219 | if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node) | |
3220 | { | |
14a3addc | 3221 | if (sym->attr.subroutine || sym == sym->result) |
4ee9c684 | 3222 | { |
d4163395 | 3223 | if (current_fake_result_decl != NULL) |
3224 | result = TREE_VALUE (current_fake_result_decl); | |
3225 | else | |
3226 | result = NULL_TREE; | |
4ee9c684 | 3227 | current_fake_result_decl = NULL_TREE; |
3228 | } | |
3229 | else | |
3230 | result = sym->result->backend_decl; | |
3231 | ||
2294b616 | 3232 | if (result != NULL_TREE && sym->attr.function |
3233 | && sym->ts.type == BT_DERIVED | |
3234 | && sym->ts.derived->attr.alloc_comp) | |
3235 | { | |
3236 | rank = sym->as ? sym->as->rank : 0; | |
3237 | tmp2 = gfc_nullify_alloc_comp (sym->ts.derived, result, rank); | |
3238 | gfc_add_expr_to_block (&block, tmp2); | |
3239 | } | |
3240 | ||
3241 | gfc_add_expr_to_block (&block, tmp); | |
3242 | ||
3243 | if (result == NULL_TREE) | |
c3ceba8e | 3244 | warning (0, "Function return value not set"); |
4ee9c684 | 3245 | else |
3246 | { | |
f888a3fb | 3247 | /* Set the return value to the dummy result variable. */ |
ed52ef8b | 3248 | tmp = build2 (MODIFY_EXPR, TREE_TYPE (result), |
3249 | DECL_RESULT (fndecl), result); | |
3250 | tmp = build1_v (RETURN_EXPR, tmp); | |
4ee9c684 | 3251 | gfc_add_expr_to_block (&block, tmp); |
3252 | } | |
3253 | } | |
2294b616 | 3254 | else |
3255 | gfc_add_expr_to_block (&block, tmp); | |
3256 | ||
4ee9c684 | 3257 | |
3258 | /* Add all the decls we created during processing. */ | |
3259 | decl = saved_function_decls; | |
3260 | while (decl) | |
3261 | { | |
3262 | tree next; | |
3263 | ||
3264 | next = TREE_CHAIN (decl); | |
3265 | TREE_CHAIN (decl) = NULL_TREE; | |
3266 | pushdecl (decl); | |
3267 | decl = next; | |
3268 | } | |
3269 | saved_function_decls = NULL_TREE; | |
3270 | ||
3271 | DECL_SAVED_TREE (fndecl) = gfc_finish_block (&block); | |
3272 | ||
3273 | /* Finish off this function and send it for code generation. */ | |
3274 | poplevel (1, 0, 1); | |
3275 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; | |
3276 | ||
3277 | /* Output the GENERIC tree. */ | |
3278 | dump_function (TDI_original, fndecl); | |
3279 | ||
3280 | /* Store the end of the function, so that we get good line number | |
3281 | info for the epilogue. */ | |
3282 | cfun->function_end_locus = input_location; | |
3283 | ||
3284 | /* We're leaving the context of this function, so zap cfun. | |
3285 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in | |
3286 | tree_rest_of_compilation. */ | |
3287 | cfun = NULL; | |
3288 | ||
3289 | if (old_context) | |
3290 | { | |
3291 | pop_function_context (); | |
3292 | saved_function_decls = saved_parent_function_decls; | |
3293 | } | |
3294 | current_function_decl = old_context; | |
3295 | ||
3296 | if (decl_function_context (fndecl)) | |
6374121b | 3297 | /* Register this function with cgraph just far enough to get it |
3298 | added to our parent's nested function list. */ | |
3299 | (void) cgraph_node (fndecl); | |
4ee9c684 | 3300 | else |
3301 | { | |
6374121b | 3302 | gfc_gimplify_function (fndecl); |
9d95b2b0 | 3303 | cgraph_finalize_function (fndecl, false); |
4ee9c684 | 3304 | } |
3305 | } | |
3306 | ||
4ee9c684 | 3307 | void |
3308 | gfc_generate_constructors (void) | |
3309 | { | |
22d678e8 | 3310 | gcc_assert (gfc_static_ctors == NULL_TREE); |
4ee9c684 | 3311 | #if 0 |
3312 | tree fnname; | |
3313 | tree type; | |
3314 | tree fndecl; | |
3315 | tree decl; | |
3316 | tree tmp; | |
3317 | ||
3318 | if (gfc_static_ctors == NULL_TREE) | |
3319 | return; | |
3320 | ||
db85cc4f | 3321 | fnname = get_file_function_name ("I"); |
4ee9c684 | 3322 | type = build_function_type (void_type_node, |
3323 | gfc_chainon_list (NULL_TREE, void_type_node)); | |
3324 | ||
3325 | fndecl = build_decl (FUNCTION_DECL, fnname, type); | |
3326 | TREE_PUBLIC (fndecl) = 1; | |
3327 | ||
3328 | decl = build_decl (RESULT_DECL, NULL_TREE, void_type_node); | |
540edea7 | 3329 | DECL_ARTIFICIAL (decl) = 1; |
3330 | DECL_IGNORED_P (decl) = 1; | |
4ee9c684 | 3331 | DECL_CONTEXT (decl) = fndecl; |
3332 | DECL_RESULT (fndecl) = decl; | |
3333 | ||
3334 | pushdecl (fndecl); | |
3335 | ||
3336 | current_function_decl = fndecl; | |
3337 | ||
b2c4af5e | 3338 | rest_of_decl_compilation (fndecl, 1, 0); |
4ee9c684 | 3339 | |
b2c4af5e | 3340 | make_decl_rtl (fndecl); |
4ee9c684 | 3341 | |
b31f705b | 3342 | init_function_start (fndecl); |
4ee9c684 | 3343 | |
4ee9c684 | 3344 | pushlevel (0); |
3345 | ||
3346 | for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors)) | |
3347 | { | |
3348 | tmp = | |
ac47d547 | 3349 | build_function_call_expr (TREE_VALUE (gfc_static_ctors), NULL_TREE); |
4ee9c684 | 3350 | DECL_SAVED_TREE (fndecl) = build_stmt (EXPR_STMT, tmp); |
3351 | } | |
3352 | ||
3353 | poplevel (1, 0, 1); | |
3354 | ||
3355 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; | |
3356 | ||
3357 | free_after_parsing (cfun); | |
3358 | free_after_compilation (cfun); | |
3359 | ||
6148a911 | 3360 | tree_rest_of_compilation (fndecl); |
4ee9c684 | 3361 | |
3362 | current_function_decl = NULL_TREE; | |
3363 | #endif | |
3364 | } | |
3365 | ||
9ec7c303 | 3366 | /* Translates a BLOCK DATA program unit. This means emitting the |
3367 | commons contained therein plus their initializations. We also emit | |
3368 | a globally visible symbol to make sure that each BLOCK DATA program | |
3369 | unit remains unique. */ | |
3370 | ||
3371 | void | |
3372 | gfc_generate_block_data (gfc_namespace * ns) | |
3373 | { | |
3374 | tree decl; | |
3375 | tree id; | |
3376 | ||
b31f705b | 3377 | /* Tell the backend the source location of the block data. */ |
3378 | if (ns->proc_name) | |
3379 | gfc_set_backend_locus (&ns->proc_name->declared_at); | |
3380 | else | |
3381 | gfc_set_backend_locus (&gfc_current_locus); | |
3382 | ||
3383 | /* Process the DATA statements. */ | |
9ec7c303 | 3384 | gfc_trans_common (ns); |
3385 | ||
b31f705b | 3386 | /* Create a global symbol with the mane of the block data. This is to |
3387 | generate linker errors if the same name is used twice. It is never | |
3388 | really used. */ | |
9ec7c303 | 3389 | if (ns->proc_name) |
3390 | id = gfc_sym_mangled_function_id (ns->proc_name); | |
3391 | else | |
3392 | id = get_identifier ("__BLOCK_DATA__"); | |
3393 | ||
3394 | decl = build_decl (VAR_DECL, id, gfc_array_index_type); | |
3395 | TREE_PUBLIC (decl) = 1; | |
3396 | TREE_STATIC (decl) = 1; | |
3397 | ||
3398 | pushdecl (decl); | |
3399 | rest_of_decl_compilation (decl, 1, 0); | |
3400 | } | |
3401 | ||
b549d2a5 | 3402 | |
4ee9c684 | 3403 | #include "gt-fortran-trans-decl.h" |