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4ee9c684 | 1 | /* Backend function setup |
c820a7e7 | 2 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software |
3 | Foundation, 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 | |
bdabe786 | 10 | Software Foundation; either version 3, or (at your option) any later |
c84b470d | 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 | |
bdabe786 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
4ee9c684 | 21 | |
22 | /* trans-decl.c -- Handling of backend function and variable decls, etc */ | |
23 | ||
24 | #include "config.h" | |
25 | #include "system.h" | |
26 | #include "coretypes.h" | |
27 | #include "tree.h" | |
28 | #include "tree-dump.h" | |
88bce636 | 29 | #include "tree-gimple.h" |
4ee9c684 | 30 | #include "ggc.h" |
31 | #include "toplev.h" | |
32 | #include "tm.h" | |
0290e11b | 33 | #include "rtl.h" |
4ee9c684 | 34 | #include "target.h" |
35 | #include "function.h" | |
4ee9c684 | 36 | #include "flags.h" |
37 | #include "cgraph.h" | |
4ee9c684 | 38 | #include "gfortran.h" |
39 | #include "trans.h" | |
40 | #include "trans-types.h" | |
41 | #include "trans-array.h" | |
42 | #include "trans-const.h" | |
43 | /* Only for gfc_trans_code. Shouldn't need to include this. */ | |
44 | #include "trans-stmt.h" | |
45 | ||
46 | #define MAX_LABEL_VALUE 99999 | |
47 | ||
48 | ||
49 | /* Holds the result of the function if no result variable specified. */ | |
50 | ||
51 | static GTY(()) tree current_fake_result_decl; | |
c750cc52 | 52 | static GTY(()) tree parent_fake_result_decl; |
4ee9c684 | 53 | |
54 | static GTY(()) tree current_function_return_label; | |
55 | ||
56 | ||
57 | /* Holds the variable DECLs for the current function. */ | |
58 | ||
d4163395 | 59 | static GTY(()) tree saved_function_decls; |
60 | static GTY(()) tree saved_parent_function_decls; | |
4ee9c684 | 61 | |
62 | ||
63 | /* The namespace of the module we're currently generating. Only used while | |
64 | outputting decls for module variables. Do not rely on this being set. */ | |
65 | ||
66 | static gfc_namespace *module_namespace; | |
67 | ||
68 | ||
69 | /* List of static constructor functions. */ | |
70 | ||
71 | tree gfc_static_ctors; | |
72 | ||
73 | ||
74 | /* Function declarations for builtin library functions. */ | |
75 | ||
9e1839e2 | 76 | tree gfor_fndecl_internal_realloc; |
4ee9c684 | 77 | tree gfor_fndecl_allocate; |
8a92488f | 78 | tree gfor_fndecl_allocate_array; |
4ee9c684 | 79 | tree gfor_fndecl_deallocate; |
80 | tree gfor_fndecl_pause_numeric; | |
81 | tree gfor_fndecl_pause_string; | |
82 | tree gfor_fndecl_stop_numeric; | |
83 | tree gfor_fndecl_stop_string; | |
84 | tree gfor_fndecl_select_string; | |
85 | tree gfor_fndecl_runtime_error; | |
50ad5fa2 | 86 | tree gfor_fndecl_runtime_error_at; |
9915365e | 87 | tree gfor_fndecl_os_error; |
50ad5fa2 | 88 | tree gfor_fndecl_generate_error; |
8c84a5de | 89 | tree gfor_fndecl_set_fpe; |
56c7c2d7 | 90 | tree gfor_fndecl_set_options; |
15774a8b | 91 | tree gfor_fndecl_set_convert; |
f23886ab | 92 | tree gfor_fndecl_set_record_marker; |
bbaaa7b1 | 93 | tree gfor_fndecl_set_max_subrecord_length; |
b902b078 | 94 | tree gfor_fndecl_ctime; |
95 | tree gfor_fndecl_fdate; | |
dbc97b88 | 96 | tree gfor_fndecl_ttynam; |
4ee9c684 | 97 | tree gfor_fndecl_in_pack; |
98 | tree gfor_fndecl_in_unpack; | |
99 | tree gfor_fndecl_associated; | |
100 | ||
101 | ||
102 | /* Math functions. Many other math functions are handled in | |
103 | trans-intrinsic.c. */ | |
104 | ||
920e54ef | 105 | gfc_powdecl_list gfor_fndecl_math_powi[4][3]; |
4ee9c684 | 106 | tree gfor_fndecl_math_cpowf; |
107 | tree gfor_fndecl_math_cpow; | |
920e54ef | 108 | tree gfor_fndecl_math_cpowl10; |
109 | tree gfor_fndecl_math_cpowl16; | |
4ee9c684 | 110 | tree gfor_fndecl_math_ishftc4; |
111 | tree gfor_fndecl_math_ishftc8; | |
920e54ef | 112 | tree gfor_fndecl_math_ishftc16; |
4ee9c684 | 113 | tree gfor_fndecl_math_exponent4; |
114 | tree gfor_fndecl_math_exponent8; | |
920e54ef | 115 | tree gfor_fndecl_math_exponent10; |
116 | tree gfor_fndecl_math_exponent16; | |
4ee9c684 | 117 | |
118 | ||
119 | /* String functions. */ | |
120 | ||
4ee9c684 | 121 | tree gfor_fndecl_compare_string; |
122 | tree gfor_fndecl_concat_string; | |
123 | tree gfor_fndecl_string_len_trim; | |
124 | tree gfor_fndecl_string_index; | |
125 | tree gfor_fndecl_string_scan; | |
126 | tree gfor_fndecl_string_verify; | |
127 | tree gfor_fndecl_string_trim; | |
4ee9c684 | 128 | tree gfor_fndecl_adjustl; |
129 | tree gfor_fndecl_adjustr; | |
130 | ||
131 | ||
132 | /* Other misc. runtime library functions. */ | |
133 | ||
134 | tree gfor_fndecl_size0; | |
135 | tree gfor_fndecl_size1; | |
9b057c29 | 136 | tree gfor_fndecl_iargc; |
4ee9c684 | 137 | |
138 | /* Intrinsic functions implemented in FORTRAN. */ | |
139 | tree gfor_fndecl_si_kind; | |
140 | tree gfor_fndecl_sr_kind; | |
141 | ||
4e8e57b0 | 142 | /* BLAS gemm functions. */ |
143 | tree gfor_fndecl_sgemm; | |
144 | tree gfor_fndecl_dgemm; | |
145 | tree gfor_fndecl_cgemm; | |
146 | tree gfor_fndecl_zgemm; | |
147 | ||
4ee9c684 | 148 | |
149 | static void | |
150 | gfc_add_decl_to_parent_function (tree decl) | |
151 | { | |
22d678e8 | 152 | gcc_assert (decl); |
4ee9c684 | 153 | DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl); |
154 | DECL_NONLOCAL (decl) = 1; | |
155 | TREE_CHAIN (decl) = saved_parent_function_decls; | |
156 | saved_parent_function_decls = decl; | |
157 | } | |
158 | ||
159 | void | |
160 | gfc_add_decl_to_function (tree decl) | |
161 | { | |
22d678e8 | 162 | gcc_assert (decl); |
4ee9c684 | 163 | TREE_USED (decl) = 1; |
164 | DECL_CONTEXT (decl) = current_function_decl; | |
165 | TREE_CHAIN (decl) = saved_function_decls; | |
166 | saved_function_decls = decl; | |
167 | } | |
168 | ||
169 | ||
b797d6d3 | 170 | /* Build a backend label declaration. Set TREE_USED for named labels. |
171 | The context of the label is always the current_function_decl. All | |
172 | labels are marked artificial. */ | |
4ee9c684 | 173 | |
174 | tree | |
175 | gfc_build_label_decl (tree label_id) | |
176 | { | |
177 | /* 2^32 temporaries should be enough. */ | |
178 | static unsigned int tmp_num = 1; | |
179 | tree label_decl; | |
180 | char *label_name; | |
181 | ||
182 | if (label_id == NULL_TREE) | |
183 | { | |
184 | /* Build an internal label name. */ | |
185 | ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++); | |
186 | label_id = get_identifier (label_name); | |
187 | } | |
188 | else | |
189 | label_name = NULL; | |
190 | ||
191 | /* Build the LABEL_DECL node. Labels have no type. */ | |
192 | label_decl = build_decl (LABEL_DECL, label_id, void_type_node); | |
193 | DECL_CONTEXT (label_decl) = current_function_decl; | |
194 | DECL_MODE (label_decl) = VOIDmode; | |
195 | ||
b797d6d3 | 196 | /* We always define the label as used, even if the original source |
197 | file never references the label. We don't want all kinds of | |
198 | spurious warnings for old-style Fortran code with too many | |
199 | labels. */ | |
200 | TREE_USED (label_decl) = 1; | |
4ee9c684 | 201 | |
b797d6d3 | 202 | DECL_ARTIFICIAL (label_decl) = 1; |
4ee9c684 | 203 | return label_decl; |
204 | } | |
205 | ||
206 | ||
207 | /* Returns the return label for the current function. */ | |
208 | ||
209 | tree | |
210 | gfc_get_return_label (void) | |
211 | { | |
212 | char name[GFC_MAX_SYMBOL_LEN + 10]; | |
213 | ||
214 | if (current_function_return_label) | |
215 | return current_function_return_label; | |
216 | ||
217 | sprintf (name, "__return_%s", | |
218 | IDENTIFIER_POINTER (DECL_NAME (current_function_decl))); | |
219 | ||
220 | current_function_return_label = | |
221 | gfc_build_label_decl (get_identifier (name)); | |
222 | ||
223 | DECL_ARTIFICIAL (current_function_return_label) = 1; | |
224 | ||
225 | return current_function_return_label; | |
226 | } | |
227 | ||
228 | ||
b31f705b | 229 | /* Set the backend source location of a decl. */ |
230 | ||
231 | void | |
232 | gfc_set_decl_location (tree decl, locus * loc) | |
233 | { | |
234 | #ifdef USE_MAPPED_LOCATION | |
235 | DECL_SOURCE_LOCATION (decl) = loc->lb->location; | |
236 | #else | |
237 | DECL_SOURCE_LINE (decl) = loc->lb->linenum; | |
238 | DECL_SOURCE_FILE (decl) = loc->lb->file->filename; | |
239 | #endif | |
240 | } | |
241 | ||
242 | ||
4ee9c684 | 243 | /* Return the backend label declaration for a given label structure, |
244 | or create it if it doesn't exist yet. */ | |
245 | ||
246 | tree | |
247 | gfc_get_label_decl (gfc_st_label * lp) | |
248 | { | |
4ee9c684 | 249 | if (lp->backend_decl) |
250 | return lp->backend_decl; | |
251 | else | |
252 | { | |
253 | char label_name[GFC_MAX_SYMBOL_LEN + 1]; | |
254 | tree label_decl; | |
255 | ||
256 | /* Validate the label declaration from the front end. */ | |
22d678e8 | 257 | gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE); |
4ee9c684 | 258 | |
259 | /* Build a mangled name for the label. */ | |
260 | sprintf (label_name, "__label_%.6d", lp->value); | |
261 | ||
262 | /* Build the LABEL_DECL node. */ | |
263 | label_decl = gfc_build_label_decl (get_identifier (label_name)); | |
264 | ||
265 | /* Tell the debugger where the label came from. */ | |
f888a3fb | 266 | if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */ |
b31f705b | 267 | gfc_set_decl_location (label_decl, &lp->where); |
4ee9c684 | 268 | else |
269 | DECL_ARTIFICIAL (label_decl) = 1; | |
270 | ||
271 | /* Store the label in the label list and return the LABEL_DECL. */ | |
272 | lp->backend_decl = label_decl; | |
273 | return label_decl; | |
274 | } | |
275 | } | |
276 | ||
277 | ||
278 | /* Convert a gfc_symbol to an identifier of the same name. */ | |
279 | ||
280 | static tree | |
281 | gfc_sym_identifier (gfc_symbol * sym) | |
282 | { | |
283 | return (get_identifier (sym->name)); | |
284 | } | |
285 | ||
286 | ||
287 | /* Construct mangled name from symbol name. */ | |
288 | ||
289 | static tree | |
290 | gfc_sym_mangled_identifier (gfc_symbol * sym) | |
291 | { | |
292 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; | |
293 | ||
c5d33754 | 294 | /* Prevent the mangling of identifiers that have an assigned |
295 | binding label (mainly those that are bind(c)). */ | |
296 | if (sym->attr.is_bind_c == 1 | |
297 | && sym->binding_label[0] != '\0') | |
298 | return get_identifier(sym->binding_label); | |
299 | ||
4f0fae8e | 300 | if (sym->module == NULL) |
4ee9c684 | 301 | return gfc_sym_identifier (sym); |
302 | else | |
303 | { | |
f08a3f6f | 304 | snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name); |
4ee9c684 | 305 | return get_identifier (name); |
306 | } | |
307 | } | |
308 | ||
309 | ||
310 | /* Construct mangled function name from symbol name. */ | |
311 | ||
312 | static tree | |
313 | gfc_sym_mangled_function_id (gfc_symbol * sym) | |
314 | { | |
315 | int has_underscore; | |
316 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; | |
317 | ||
c5d33754 | 318 | /* It may be possible to simply use the binding label if it's |
319 | provided, and remove the other checks. Then we could use it | |
320 | for other things if we wished. */ | |
321 | if ((sym->attr.is_bind_c == 1 || sym->attr.is_iso_c == 1) && | |
322 | sym->binding_label[0] != '\0') | |
323 | /* use the binding label rather than the mangled name */ | |
324 | return get_identifier (sym->binding_label); | |
325 | ||
4f0fae8e | 326 | if (sym->module == NULL || sym->attr.proc == PROC_EXTERNAL |
12441a18 | 327 | || (sym->module != NULL && (sym->attr.external |
328 | || sym->attr.if_source == IFSRC_IFBODY))) | |
4ee9c684 | 329 | { |
330 | if (strcmp (sym->name, "MAIN__") == 0 | |
331 | || sym->attr.proc == PROC_INTRINSIC) | |
332 | return get_identifier (sym->name); | |
333 | ||
334 | if (gfc_option.flag_underscoring) | |
335 | { | |
336 | has_underscore = strchr (sym->name, '_') != 0; | |
337 | if (gfc_option.flag_second_underscore && has_underscore) | |
338 | snprintf (name, sizeof name, "%s__", sym->name); | |
339 | else | |
340 | snprintf (name, sizeof name, "%s_", sym->name); | |
341 | return get_identifier (name); | |
342 | } | |
343 | else | |
344 | return get_identifier (sym->name); | |
345 | } | |
346 | else | |
347 | { | |
f08a3f6f | 348 | snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name); |
4ee9c684 | 349 | return get_identifier (name); |
350 | } | |
351 | } | |
352 | ||
353 | ||
5ed82495 | 354 | /* Returns true if a variable of specified size should go on the stack. */ |
355 | ||
356 | int | |
357 | gfc_can_put_var_on_stack (tree size) | |
358 | { | |
359 | unsigned HOST_WIDE_INT low; | |
360 | ||
361 | if (!INTEGER_CST_P (size)) | |
362 | return 0; | |
363 | ||
364 | if (gfc_option.flag_max_stack_var_size < 0) | |
365 | return 1; | |
366 | ||
367 | if (TREE_INT_CST_HIGH (size) != 0) | |
368 | return 0; | |
369 | ||
370 | low = TREE_INT_CST_LOW (size); | |
371 | if (low > (unsigned HOST_WIDE_INT) gfc_option.flag_max_stack_var_size) | |
372 | return 0; | |
373 | ||
374 | /* TODO: Set a per-function stack size limit. */ | |
375 | ||
376 | return 1; | |
377 | } | |
378 | ||
379 | ||
b7bf3f81 | 380 | /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to |
381 | an expression involving its corresponding pointer. There are | |
382 | 2 cases; one for variable size arrays, and one for everything else, | |
383 | because variable-sized arrays require one fewer level of | |
384 | indirection. */ | |
385 | ||
386 | static void | |
387 | gfc_finish_cray_pointee (tree decl, gfc_symbol *sym) | |
388 | { | |
389 | tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer); | |
390 | tree value; | |
391 | ||
392 | /* Parameters need to be dereferenced. */ | |
393 | if (sym->cp_pointer->attr.dummy) | |
4fa2c167 | 394 | ptr_decl = build_fold_indirect_ref (ptr_decl); |
b7bf3f81 | 395 | |
396 | /* Check to see if we're dealing with a variable-sized array. */ | |
397 | if (sym->attr.dimension | |
398 | && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) | |
399 | { | |
942043f8 | 400 | /* These decls will be dereferenced later, so we don't dereference |
b7bf3f81 | 401 | them here. */ |
402 | value = convert (TREE_TYPE (decl), ptr_decl); | |
403 | } | |
404 | else | |
405 | { | |
406 | ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)), | |
407 | ptr_decl); | |
4fa2c167 | 408 | value = build_fold_indirect_ref (ptr_decl); |
b7bf3f81 | 409 | } |
410 | ||
411 | SET_DECL_VALUE_EXPR (decl, value); | |
412 | DECL_HAS_VALUE_EXPR_P (decl) = 1; | |
764f1175 | 413 | GFC_DECL_CRAY_POINTEE (decl) = 1; |
b7bf3f81 | 414 | /* This is a fake variable just for debugging purposes. */ |
415 | TREE_ASM_WRITTEN (decl) = 1; | |
416 | } | |
417 | ||
418 | ||
b9c7fce7 | 419 | /* Finish processing of a declaration without an initial value. */ |
4ee9c684 | 420 | |
421 | static void | |
b9c7fce7 | 422 | gfc_finish_decl (tree decl) |
4ee9c684 | 423 | { |
b9c7fce7 | 424 | gcc_assert (TREE_CODE (decl) == PARM_DECL |
425 | || DECL_INITIAL (decl) == NULL_TREE); | |
4ee9c684 | 426 | |
b9c7fce7 | 427 | if (TREE_CODE (decl) != VAR_DECL) |
428 | return; | |
4ee9c684 | 429 | |
b9c7fce7 | 430 | if (DECL_SIZE (decl) == NULL_TREE |
431 | && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE) | |
432 | layout_decl (decl, 0); | |
433 | ||
434 | /* A few consistency checks. */ | |
435 | /* A static variable with an incomplete type is an error if it is | |
436 | initialized. Also if it is not file scope. Otherwise, let it | |
437 | through, but if it is not `extern' then it may cause an error | |
438 | message later. */ | |
439 | /* An automatic variable with an incomplete type is an error. */ | |
440 | ||
441 | /* We should know the storage size. */ | |
442 | gcc_assert (DECL_SIZE (decl) != NULL_TREE | |
443 | || (TREE_STATIC (decl) | |
444 | ? (!DECL_INITIAL (decl) || !DECL_CONTEXT (decl)) | |
445 | : DECL_EXTERNAL (decl))); | |
446 | ||
447 | /* The storage size should be constant. */ | |
448 | gcc_assert ((!DECL_EXTERNAL (decl) && !TREE_STATIC (decl)) | |
449 | || !DECL_SIZE (decl) | |
450 | || TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST); | |
4ee9c684 | 451 | } |
452 | ||
453 | ||
454 | /* Apply symbol attributes to a variable, and add it to the function scope. */ | |
455 | ||
456 | static void | |
457 | gfc_finish_var_decl (tree decl, gfc_symbol * sym) | |
458 | { | |
970a6d2d | 459 | tree new; |
f888a3fb | 460 | /* TREE_ADDRESSABLE means the address of this variable is actually needed. |
4ee9c684 | 461 | This is the equivalent of the TARGET variables. |
462 | We also need to set this if the variable is passed by reference in a | |
463 | CALL statement. */ | |
b549d2a5 | 464 | |
b7bf3f81 | 465 | /* Set DECL_VALUE_EXPR for Cray Pointees. */ |
b549d2a5 | 466 | if (sym->attr.cray_pointee) |
b7bf3f81 | 467 | gfc_finish_cray_pointee (decl, sym); |
b549d2a5 | 468 | |
4ee9c684 | 469 | if (sym->attr.target) |
470 | TREE_ADDRESSABLE (decl) = 1; | |
471 | /* If it wasn't used we wouldn't be getting it. */ | |
472 | TREE_USED (decl) = 1; | |
473 | ||
474 | /* Chain this decl to the pending declarations. Don't do pushdecl() | |
475 | because this would add them to the current scope rather than the | |
476 | function scope. */ | |
477 | if (current_function_decl != NULL_TREE) | |
478 | { | |
7af6a4af | 479 | if (sym->ns->proc_name->backend_decl == current_function_decl |
480 | || sym->result == sym) | |
4ee9c684 | 481 | gfc_add_decl_to_function (decl); |
482 | else | |
483 | gfc_add_decl_to_parent_function (decl); | |
484 | } | |
485 | ||
b7bf3f81 | 486 | if (sym->attr.cray_pointee) |
487 | return; | |
488 | ||
c5d33754 | 489 | if(sym->attr.is_bind_c == 1) |
490 | { | |
491 | /* We need to put variables that are bind(c) into the common | |
492 | segment of the object file, because this is what C would do. | |
493 | gfortran would typically put them in either the BSS or | |
494 | initialized data segments, and only mark them as common if | |
495 | they were part of common blocks. However, if they are not put | |
496 | into common space, then C cannot initialize global fortran | |
497 | variables that it interoperates with and the draft says that | |
498 | either Fortran or C should be able to initialize it (but not | |
499 | both, of course.) (J3/04-007, section 15.3). */ | |
500 | TREE_PUBLIC(decl) = 1; | |
501 | DECL_COMMON(decl) = 1; | |
502 | } | |
503 | ||
4ee9c684 | 504 | /* If a variable is USE associated, it's always external. */ |
505 | if (sym->attr.use_assoc) | |
506 | { | |
507 | DECL_EXTERNAL (decl) = 1; | |
508 | TREE_PUBLIC (decl) = 1; | |
509 | } | |
4f0fae8e | 510 | else if (sym->module && !sym->attr.result && !sym->attr.dummy) |
4ee9c684 | 511 | { |
6b20224d | 512 | /* TODO: Don't set sym->module for result or dummy variables. */ |
7af6a4af | 513 | gcc_assert (current_function_decl == NULL_TREE || sym->result == sym); |
4ee9c684 | 514 | /* This is the declaration of a module variable. */ |
515 | TREE_PUBLIC (decl) = 1; | |
516 | TREE_STATIC (decl) = 1; | |
517 | } | |
518 | ||
519 | if ((sym->attr.save || sym->attr.data || sym->value) | |
520 | && !sym->attr.use_assoc) | |
521 | TREE_STATIC (decl) = 1; | |
ef814c81 | 522 | |
523 | if (sym->attr.volatile_) | |
524 | { | |
ef814c81 | 525 | TREE_THIS_VOLATILE (decl) = 1; |
526 | new = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE); | |
527 | TREE_TYPE (decl) = new; | |
528 | } | |
529 | ||
4ee9c684 | 530 | /* Keep variables larger than max-stack-var-size off stack. */ |
531 | if (!sym->ns->proc_name->attr.recursive | |
532 | && INTEGER_CST_P (DECL_SIZE_UNIT (decl)) | |
a3f2c0e1 | 533 | && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl)) |
534 | /* Put variable length auto array pointers always into stack. */ | |
535 | && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE | |
536 | || sym->attr.dimension == 0 | |
537 | || sym->as->type != AS_EXPLICIT | |
538 | || sym->attr.pointer | |
539 | || sym->attr.allocatable) | |
540 | && !DECL_ARTIFICIAL (decl)) | |
4ee9c684 | 541 | TREE_STATIC (decl) = 1; |
764f1175 | 542 | |
543 | /* Handle threadprivate variables. */ | |
9dda1f80 | 544 | if (sym->attr.threadprivate |
764f1175 | 545 | && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) |
546 | DECL_TLS_MODEL (decl) = decl_default_tls_model (decl); | |
4ee9c684 | 547 | } |
548 | ||
549 | ||
550 | /* Allocate the lang-specific part of a decl. */ | |
551 | ||
552 | void | |
553 | gfc_allocate_lang_decl (tree decl) | |
554 | { | |
555 | DECL_LANG_SPECIFIC (decl) = (struct lang_decl *) | |
556 | ggc_alloc_cleared (sizeof (struct lang_decl)); | |
557 | } | |
558 | ||
559 | /* Remember a symbol to generate initialization/cleanup code at function | |
560 | entry/exit. */ | |
561 | ||
562 | static void | |
563 | gfc_defer_symbol_init (gfc_symbol * sym) | |
564 | { | |
565 | gfc_symbol *p; | |
566 | gfc_symbol *last; | |
567 | gfc_symbol *head; | |
568 | ||
569 | /* Don't add a symbol twice. */ | |
570 | if (sym->tlink) | |
571 | return; | |
572 | ||
573 | last = head = sym->ns->proc_name; | |
574 | p = last->tlink; | |
575 | ||
576 | /* Make sure that setup code for dummy variables which are used in the | |
577 | setup of other variables is generated first. */ | |
578 | if (sym->attr.dummy) | |
579 | { | |
580 | /* Find the first dummy arg seen after us, or the first non-dummy arg. | |
581 | This is a circular list, so don't go past the head. */ | |
582 | while (p != head | |
583 | && (!p->attr.dummy || p->dummy_order > sym->dummy_order)) | |
584 | { | |
585 | last = p; | |
586 | p = p->tlink; | |
587 | } | |
588 | } | |
589 | /* Insert in between last and p. */ | |
590 | last->tlink = sym; | |
591 | sym->tlink = p; | |
592 | } | |
593 | ||
594 | ||
595 | /* Create an array index type variable with function scope. */ | |
596 | ||
597 | static tree | |
598 | create_index_var (const char * pfx, int nest) | |
599 | { | |
600 | tree decl; | |
601 | ||
602 | decl = gfc_create_var_np (gfc_array_index_type, pfx); | |
603 | if (nest) | |
604 | gfc_add_decl_to_parent_function (decl); | |
605 | else | |
606 | gfc_add_decl_to_function (decl); | |
607 | return decl; | |
608 | } | |
609 | ||
610 | ||
611 | /* Create variables to hold all the non-constant bits of info for a | |
612 | descriptorless array. Remember these in the lang-specific part of the | |
613 | type. */ | |
614 | ||
615 | static void | |
616 | gfc_build_qualified_array (tree decl, gfc_symbol * sym) | |
617 | { | |
618 | tree type; | |
619 | int dim; | |
620 | int nest; | |
621 | ||
622 | type = TREE_TYPE (decl); | |
623 | ||
624 | /* We just use the descriptor, if there is one. */ | |
625 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
626 | return; | |
627 | ||
22d678e8 | 628 | gcc_assert (GFC_ARRAY_TYPE_P (type)); |
4ee9c684 | 629 | nest = (sym->ns->proc_name->backend_decl != current_function_decl) |
630 | && !sym->attr.contained; | |
631 | ||
632 | for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++) | |
633 | { | |
634 | if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) | |
86254bbf | 635 | { |
636 | GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); | |
637 | TREE_NO_WARNING (GFC_TYPE_ARRAY_LBOUND (type, dim)) = 1; | |
638 | } | |
9ca15c9b | 639 | /* Don't try to use the unknown bound for assumed shape arrays. */ |
4ee9c684 | 640 | if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE |
641 | && (sym->as->type != AS_ASSUMED_SIZE | |
642 | || dim < GFC_TYPE_ARRAY_RANK (type) - 1)) | |
86254bbf | 643 | { |
644 | GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); | |
645 | TREE_NO_WARNING (GFC_TYPE_ARRAY_UBOUND (type, dim)) = 1; | |
646 | } | |
4ee9c684 | 647 | |
648 | if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE) | |
86254bbf | 649 | { |
650 | GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest); | |
651 | TREE_NO_WARNING (GFC_TYPE_ARRAY_STRIDE (type, dim)) = 1; | |
652 | } | |
4ee9c684 | 653 | } |
654 | if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE) | |
655 | { | |
656 | GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type, | |
657 | "offset"); | |
86254bbf | 658 | TREE_NO_WARNING (GFC_TYPE_ARRAY_OFFSET (type)) = 1; |
659 | ||
4ee9c684 | 660 | if (nest) |
661 | gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type)); | |
662 | else | |
663 | gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type)); | |
664 | } | |
d4163395 | 665 | |
666 | if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE | |
667 | && sym->as->type != AS_ASSUMED_SIZE) | |
86254bbf | 668 | { |
669 | GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest); | |
670 | TREE_NO_WARNING (GFC_TYPE_ARRAY_SIZE (type)) = 1; | |
671 | } | |
d4163395 | 672 | |
673 | if (POINTER_TYPE_P (type)) | |
674 | { | |
675 | gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type))); | |
676 | gcc_assert (TYPE_LANG_SPECIFIC (type) | |
677 | == TYPE_LANG_SPECIFIC (TREE_TYPE (type))); | |
678 | type = TREE_TYPE (type); | |
679 | } | |
680 | ||
681 | if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type)) | |
682 | { | |
683 | tree size, range; | |
684 | ||
685 | size = build2 (MINUS_EXPR, gfc_array_index_type, | |
686 | GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node); | |
687 | range = build_range_type (gfc_array_index_type, gfc_index_zero_node, | |
688 | size); | |
689 | TYPE_DOMAIN (type) = range; | |
690 | layout_type (type); | |
691 | } | |
4ee9c684 | 692 | } |
693 | ||
694 | ||
695 | /* For some dummy arguments we don't use the actual argument directly. | |
5ed82495 | 696 | Instead we create a local decl and use that. This allows us to perform |
4ee9c684 | 697 | initialization, and construct full type information. */ |
698 | ||
699 | static tree | |
700 | gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy) | |
701 | { | |
702 | tree decl; | |
703 | tree type; | |
704 | gfc_array_spec *as; | |
705 | char *name; | |
3d8dea5a | 706 | gfc_packed packed; |
4ee9c684 | 707 | int n; |
708 | bool known_size; | |
709 | ||
710 | if (sym->attr.pointer || sym->attr.allocatable) | |
711 | return dummy; | |
712 | ||
713 | /* Add to list of variables if not a fake result variable. */ | |
714 | if (sym->attr.result || sym->attr.dummy) | |
715 | gfc_defer_symbol_init (sym); | |
716 | ||
717 | type = TREE_TYPE (dummy); | |
22d678e8 | 718 | gcc_assert (TREE_CODE (dummy) == PARM_DECL |
4ee9c684 | 719 | && POINTER_TYPE_P (type)); |
720 | ||
f888a3fb | 721 | /* Do we know the element size? */ |
4ee9c684 | 722 | known_size = sym->ts.type != BT_CHARACTER |
723 | || INTEGER_CST_P (sym->ts.cl->backend_decl); | |
724 | ||
725 | if (known_size && !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (type))) | |
726 | { | |
727 | /* For descriptorless arrays with known element size the actual | |
728 | argument is sufficient. */ | |
22d678e8 | 729 | gcc_assert (GFC_ARRAY_TYPE_P (type)); |
4ee9c684 | 730 | gfc_build_qualified_array (dummy, sym); |
731 | return dummy; | |
732 | } | |
733 | ||
734 | type = TREE_TYPE (type); | |
735 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
736 | { | |
cb8e3560 | 737 | /* Create a descriptorless array pointer. */ |
4ee9c684 | 738 | as = sym->as; |
3d8dea5a | 739 | packed = PACKED_NO; |
4ee9c684 | 740 | if (!gfc_option.flag_repack_arrays) |
741 | { | |
742 | if (as->type == AS_ASSUMED_SIZE) | |
3d8dea5a | 743 | packed = PACKED_FULL; |
4ee9c684 | 744 | } |
745 | else | |
746 | { | |
747 | if (as->type == AS_EXPLICIT) | |
748 | { | |
3d8dea5a | 749 | packed = PACKED_FULL; |
4ee9c684 | 750 | for (n = 0; n < as->rank; n++) |
751 | { | |
752 | if (!(as->upper[n] | |
753 | && as->lower[n] | |
754 | && as->upper[n]->expr_type == EXPR_CONSTANT | |
755 | && as->lower[n]->expr_type == EXPR_CONSTANT)) | |
3d8dea5a | 756 | packed = PACKED_PARTIAL; |
4ee9c684 | 757 | } |
758 | } | |
759 | else | |
3d8dea5a | 760 | packed = PACKED_PARTIAL; |
4ee9c684 | 761 | } |
762 | ||
763 | type = gfc_typenode_for_spec (&sym->ts); | |
764 | type = gfc_get_nodesc_array_type (type, sym->as, packed); | |
765 | } | |
766 | else | |
767 | { | |
768 | /* We now have an expression for the element size, so create a fully | |
769 | qualified type. Reset sym->backend decl or this will just return the | |
770 | old type. */ | |
d95efb59 | 771 | DECL_ARTIFICIAL (sym->backend_decl) = 1; |
4ee9c684 | 772 | sym->backend_decl = NULL_TREE; |
773 | type = gfc_sym_type (sym); | |
3d8dea5a | 774 | packed = PACKED_FULL; |
4ee9c684 | 775 | } |
776 | ||
777 | ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0); | |
778 | decl = build_decl (VAR_DECL, get_identifier (name), type); | |
779 | ||
780 | DECL_ARTIFICIAL (decl) = 1; | |
781 | TREE_PUBLIC (decl) = 0; | |
782 | TREE_STATIC (decl) = 0; | |
783 | DECL_EXTERNAL (decl) = 0; | |
784 | ||
785 | /* We should never get deferred shape arrays here. We used to because of | |
786 | frontend bugs. */ | |
22d678e8 | 787 | gcc_assert (sym->as->type != AS_DEFERRED); |
4ee9c684 | 788 | |
3d8dea5a | 789 | if (packed == PACKED_PARTIAL) |
790 | GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1; | |
791 | else if (packed == PACKED_FULL) | |
792 | GFC_DECL_PACKED_ARRAY (decl) = 1; | |
4ee9c684 | 793 | |
794 | gfc_build_qualified_array (decl, sym); | |
795 | ||
796 | if (DECL_LANG_SPECIFIC (dummy)) | |
797 | DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy); | |
798 | else | |
799 | gfc_allocate_lang_decl (decl); | |
800 | ||
801 | GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy; | |
802 | ||
803 | if (sym->ns->proc_name->backend_decl == current_function_decl | |
804 | || sym->attr.contained) | |
805 | gfc_add_decl_to_function (decl); | |
806 | else | |
807 | gfc_add_decl_to_parent_function (decl); | |
808 | ||
809 | return decl; | |
810 | } | |
811 | ||
812 | ||
813 | /* Return a constant or a variable to use as a string length. Does not | |
814 | add the decl to the current scope. */ | |
815 | ||
816 | static tree | |
817 | gfc_create_string_length (gfc_symbol * sym) | |
818 | { | |
819 | tree length; | |
820 | ||
22d678e8 | 821 | gcc_assert (sym->ts.cl); |
4ee9c684 | 822 | gfc_conv_const_charlen (sym->ts.cl); |
823 | ||
824 | if (sym->ts.cl->backend_decl == NULL_TREE) | |
825 | { | |
826 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; | |
827 | ||
828 | /* Also prefix the mangled name. */ | |
829 | strcpy (&name[1], sym->name); | |
830 | name[0] = '.'; | |
831 | length = build_decl (VAR_DECL, get_identifier (name), | |
9ad09405 | 832 | gfc_charlen_type_node); |
4ee9c684 | 833 | DECL_ARTIFICIAL (length) = 1; |
834 | TREE_USED (length) = 1; | |
d4163395 | 835 | if (sym->ns->proc_name->tlink != NULL) |
836 | gfc_defer_symbol_init (sym); | |
4ee9c684 | 837 | sym->ts.cl->backend_decl = length; |
838 | } | |
839 | ||
840 | return sym->ts.cl->backend_decl; | |
841 | } | |
842 | ||
c8f1568f | 843 | /* If a variable is assigned a label, we add another two auxiliary |
844 | variables. */ | |
845 | ||
846 | static void | |
847 | gfc_add_assign_aux_vars (gfc_symbol * sym) | |
848 | { | |
849 | tree addr; | |
850 | tree length; | |
851 | tree decl; | |
852 | ||
853 | gcc_assert (sym->backend_decl); | |
854 | ||
855 | decl = sym->backend_decl; | |
856 | gfc_allocate_lang_decl (decl); | |
857 | GFC_DECL_ASSIGN (decl) = 1; | |
858 | length = build_decl (VAR_DECL, create_tmp_var_name (sym->name), | |
859 | gfc_charlen_type_node); | |
860 | addr = build_decl (VAR_DECL, create_tmp_var_name (sym->name), | |
861 | pvoid_type_node); | |
862 | gfc_finish_var_decl (length, sym); | |
863 | gfc_finish_var_decl (addr, sym); | |
864 | /* STRING_LENGTH is also used as flag. Less than -1 means that | |
865 | ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the | |
866 | target label's address. Otherwise, value is the length of a format string | |
867 | and ASSIGN_ADDR is its address. */ | |
868 | if (TREE_STATIC (length)) | |
869 | DECL_INITIAL (length) = build_int_cst (NULL_TREE, -2); | |
870 | else | |
871 | gfc_defer_symbol_init (sym); | |
872 | ||
873 | GFC_DECL_STRING_LEN (decl) = length; | |
874 | GFC_DECL_ASSIGN_ADDR (decl) = addr; | |
875 | } | |
4ee9c684 | 876 | |
877 | /* Return the decl for a gfc_symbol, create it if it doesn't already | |
878 | exist. */ | |
879 | ||
880 | tree | |
881 | gfc_get_symbol_decl (gfc_symbol * sym) | |
882 | { | |
883 | tree decl; | |
884 | tree length = NULL_TREE; | |
4ee9c684 | 885 | int byref; |
886 | ||
0b5dc8b5 | 887 | gcc_assert (sym->attr.referenced |
d0f6ad22 | 888 | || sym->attr.use_assoc |
889 | || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY); | |
4ee9c684 | 890 | |
891 | if (sym->ns && sym->ns->proc_name->attr.function) | |
892 | byref = gfc_return_by_reference (sym->ns->proc_name); | |
893 | else | |
894 | byref = 0; | |
895 | ||
896 | if ((sym->attr.dummy && ! sym->attr.function) || (sym->attr.result && byref)) | |
897 | { | |
898 | /* Return via extra parameter. */ | |
899 | if (sym->attr.result && byref | |
900 | && !sym->backend_decl) | |
901 | { | |
902 | sym->backend_decl = | |
903 | DECL_ARGUMENTS (sym->ns->proc_name->backend_decl); | |
c6871095 | 904 | /* For entry master function skip over the __entry |
905 | argument. */ | |
906 | if (sym->ns->proc_name->attr.entry_master) | |
907 | sym->backend_decl = TREE_CHAIN (sym->backend_decl); | |
4ee9c684 | 908 | } |
909 | ||
910 | /* Dummy variables should already have been created. */ | |
22d678e8 | 911 | gcc_assert (sym->backend_decl); |
4ee9c684 | 912 | |
913 | /* Create a character length variable. */ | |
914 | if (sym->ts.type == BT_CHARACTER) | |
915 | { | |
916 | if (sym->ts.cl->backend_decl == NULL_TREE) | |
d4163395 | 917 | length = gfc_create_string_length (sym); |
918 | else | |
919 | length = sym->ts.cl->backend_decl; | |
920 | if (TREE_CODE (length) == VAR_DECL | |
921 | && DECL_CONTEXT (length) == NULL_TREE) | |
4ee9c684 | 922 | { |
d95efb59 | 923 | /* Add the string length to the same context as the symbol. */ |
924 | if (DECL_CONTEXT (sym->backend_decl) == current_function_decl) | |
925 | gfc_add_decl_to_function (length); | |
926 | else | |
927 | gfc_add_decl_to_parent_function (length); | |
928 | ||
929 | gcc_assert (DECL_CONTEXT (sym->backend_decl) == | |
930 | DECL_CONTEXT (length)); | |
931 | ||
d4163395 | 932 | gfc_defer_symbol_init (sym); |
e8ff3944 | 933 | } |
4ee9c684 | 934 | } |
935 | ||
936 | /* Use a copy of the descriptor for dummy arrays. */ | |
937 | if (sym->attr.dimension && !TREE_USED (sym->backend_decl)) | |
938 | { | |
d95efb59 | 939 | decl = gfc_build_dummy_array_decl (sym, sym->backend_decl); |
940 | /* Prevent the dummy from being detected as unused if it is copied. */ | |
941 | if (sym->backend_decl != NULL && decl != sym->backend_decl) | |
942 | DECL_ARTIFICIAL (sym->backend_decl) = 1; | |
943 | sym->backend_decl = decl; | |
4ee9c684 | 944 | } |
945 | ||
946 | TREE_USED (sym->backend_decl) = 1; | |
c8f1568f | 947 | if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0) |
948 | { | |
949 | gfc_add_assign_aux_vars (sym); | |
950 | } | |
4ee9c684 | 951 | return sym->backend_decl; |
952 | } | |
953 | ||
954 | if (sym->backend_decl) | |
955 | return sym->backend_decl; | |
956 | ||
4ee9c684 | 957 | /* Catch function declarations. Only used for actual parameters. */ |
958 | if (sym->attr.flavor == FL_PROCEDURE) | |
959 | { | |
960 | decl = gfc_get_extern_function_decl (sym); | |
961 | return decl; | |
962 | } | |
963 | ||
964 | if (sym->attr.intrinsic) | |
965 | internal_error ("intrinsic variable which isn't a procedure"); | |
966 | ||
967 | /* Create string length decl first so that they can be used in the | |
968 | type declaration. */ | |
969 | if (sym->ts.type == BT_CHARACTER) | |
970 | length = gfc_create_string_length (sym); | |
971 | ||
972 | /* Create the decl for the variable. */ | |
973 | decl = build_decl (VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym)); | |
974 | ||
b31f705b | 975 | gfc_set_decl_location (decl, &sym->declared_at); |
976 | ||
f888a3fb | 977 | /* Symbols from modules should have their assembler names mangled. |
4ee9c684 | 978 | This is done here rather than in gfc_finish_var_decl because it |
979 | is different for string length variables. */ | |
4f0fae8e | 980 | if (sym->module) |
4ee9c684 | 981 | SET_DECL_ASSEMBLER_NAME (decl, gfc_sym_mangled_identifier (sym)); |
982 | ||
983 | if (sym->attr.dimension) | |
984 | { | |
985 | /* Create variables to hold the non-constant bits of array info. */ | |
986 | gfc_build_qualified_array (decl, sym); | |
987 | ||
988 | /* Remember this variable for allocation/cleanup. */ | |
989 | gfc_defer_symbol_init (sym); | |
990 | ||
991 | if ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer) | |
992 | GFC_DECL_PACKED_ARRAY (decl) = 1; | |
993 | } | |
994 | ||
2294b616 | 995 | if (sym->ts.type == BT_DERIVED && sym->ts.derived->attr.alloc_comp) |
996 | gfc_defer_symbol_init (sym); | |
997 | ||
4ee9c684 | 998 | gfc_finish_var_decl (decl, sym); |
999 | ||
bda1f152 | 1000 | if (sym->ts.type == BT_CHARACTER) |
4ee9c684 | 1001 | { |
4ee9c684 | 1002 | /* Character variables need special handling. */ |
1003 | gfc_allocate_lang_decl (decl); | |
1004 | ||
bda1f152 | 1005 | if (TREE_CODE (length) != INTEGER_CST) |
4ee9c684 | 1006 | { |
1007 | char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; | |
1008 | ||
4f0fae8e | 1009 | if (sym->module) |
4ee9c684 | 1010 | { |
1011 | /* Also prefix the mangled name for symbols from modules. */ | |
1012 | strcpy (&name[1], sym->name); | |
1013 | name[0] = '.'; | |
1014 | strcpy (&name[1], | |
1015 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (length))); | |
1016 | SET_DECL_ASSEMBLER_NAME (decl, get_identifier (name)); | |
1017 | } | |
1018 | gfc_finish_var_decl (length, sym); | |
22d678e8 | 1019 | gcc_assert (!sym->value); |
4ee9c684 | 1020 | } |
4ee9c684 | 1021 | } |
1022 | sym->backend_decl = decl; | |
1023 | ||
c8f1568f | 1024 | if (sym->attr.assign) |
21ebda4d | 1025 | gfc_add_assign_aux_vars (sym); |
c8f1568f | 1026 | |
bda1f152 | 1027 | if (TREE_STATIC (decl) && !sym->attr.use_assoc) |
1028 | { | |
1029 | /* Add static initializer. */ | |
1030 | DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, | |
1031 | TREE_TYPE (decl), sym->attr.dimension, | |
1032 | sym->attr.pointer || sym->attr.allocatable); | |
1033 | } | |
1034 | ||
4ee9c684 | 1035 | return decl; |
1036 | } | |
1037 | ||
1038 | ||
dbe60343 | 1039 | /* Substitute a temporary variable in place of the real one. */ |
1040 | ||
1041 | void | |
1042 | gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save) | |
1043 | { | |
1044 | save->attr = sym->attr; | |
1045 | save->decl = sym->backend_decl; | |
1046 | ||
1047 | gfc_clear_attr (&sym->attr); | |
1048 | sym->attr.referenced = 1; | |
1049 | sym->attr.flavor = FL_VARIABLE; | |
1050 | ||
1051 | sym->backend_decl = decl; | |
1052 | } | |
1053 | ||
1054 | ||
1055 | /* Restore the original variable. */ | |
1056 | ||
1057 | void | |
1058 | gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save) | |
1059 | { | |
1060 | sym->attr = save->attr; | |
1061 | sym->backend_decl = save->decl; | |
1062 | } | |
1063 | ||
1064 | ||
4ee9c684 | 1065 | /* Get a basic decl for an external function. */ |
1066 | ||
1067 | tree | |
1068 | gfc_get_extern_function_decl (gfc_symbol * sym) | |
1069 | { | |
1070 | tree type; | |
1071 | tree fndecl; | |
1072 | gfc_expr e; | |
1073 | gfc_intrinsic_sym *isym; | |
1074 | gfc_expr argexpr; | |
17000b91 | 1075 | char s[GFC_MAX_SYMBOL_LEN + 23]; /* "_gfortran_f2c_specific" and '\0'. */ |
4ee9c684 | 1076 | tree name; |
1077 | tree mangled_name; | |
1078 | ||
1079 | if (sym->backend_decl) | |
1080 | return sym->backend_decl; | |
1081 | ||
1b716045 | 1082 | /* We should never be creating external decls for alternate entry points. |
1083 | The procedure may be an alternate entry point, but we don't want/need | |
1084 | to know that. */ | |
22d678e8 | 1085 | gcc_assert (!(sym->attr.entry || sym->attr.entry_master)); |
1b716045 | 1086 | |
4ee9c684 | 1087 | if (sym->attr.intrinsic) |
1088 | { | |
1089 | /* Call the resolution function to get the actual name. This is | |
1090 | a nasty hack which relies on the resolution functions only looking | |
1091 | at the first argument. We pass NULL for the second argument | |
1092 | otherwise things like AINT get confused. */ | |
1093 | isym = gfc_find_function (sym->name); | |
22d678e8 | 1094 | gcc_assert (isym->resolve.f0 != NULL); |
4ee9c684 | 1095 | |
1096 | memset (&e, 0, sizeof (e)); | |
1097 | e.expr_type = EXPR_FUNCTION; | |
1098 | ||
1099 | memset (&argexpr, 0, sizeof (argexpr)); | |
22d678e8 | 1100 | gcc_assert (isym->formal); |
4ee9c684 | 1101 | argexpr.ts = isym->formal->ts; |
1102 | ||
1103 | if (isym->formal->next == NULL) | |
1104 | isym->resolve.f1 (&e, &argexpr); | |
1105 | else | |
1106 | { | |
37e0271a | 1107 | if (isym->formal->next->next == NULL) |
1108 | isym->resolve.f2 (&e, &argexpr, NULL); | |
1109 | else | |
1110 | { | |
1111 | /* All specific intrinsics take less than 4 arguments. */ | |
1112 | gcc_assert (isym->formal->next->next->next == NULL); | |
1113 | isym->resolve.f3 (&e, &argexpr, NULL, NULL); | |
1114 | } | |
4ee9c684 | 1115 | } |
bdaed7d2 | 1116 | |
1117 | if (gfc_option.flag_f2c | |
1118 | && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind) | |
1119 | || e.ts.type == BT_COMPLEX)) | |
1120 | { | |
1121 | /* Specific which needs a different implementation if f2c | |
1122 | calling conventions are used. */ | |
17000b91 | 1123 | sprintf (s, "_gfortran_f2c_specific%s", e.value.function.name); |
bdaed7d2 | 1124 | } |
1125 | else | |
17000b91 | 1126 | sprintf (s, "_gfortran_specific%s", e.value.function.name); |
bdaed7d2 | 1127 | |
4ee9c684 | 1128 | name = get_identifier (s); |
1129 | mangled_name = name; | |
1130 | } | |
1131 | else | |
1132 | { | |
1133 | name = gfc_sym_identifier (sym); | |
1134 | mangled_name = gfc_sym_mangled_function_id (sym); | |
1135 | } | |
1136 | ||
1137 | type = gfc_get_function_type (sym); | |
1138 | fndecl = build_decl (FUNCTION_DECL, name, type); | |
1139 | ||
1140 | SET_DECL_ASSEMBLER_NAME (fndecl, mangled_name); | |
1141 | /* If the return type is a pointer, avoid alias issues by setting | |
1142 | DECL_IS_MALLOC to nonzero. This means that the function should be | |
1143 | treated as if it were a malloc, meaning it returns a pointer that | |
1144 | is not an alias. */ | |
1145 | if (POINTER_TYPE_P (type)) | |
1146 | DECL_IS_MALLOC (fndecl) = 1; | |
1147 | ||
1148 | /* Set the context of this decl. */ | |
1149 | if (0 && sym->ns && sym->ns->proc_name) | |
1150 | { | |
1151 | /* TODO: Add external decls to the appropriate scope. */ | |
1152 | DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl; | |
1153 | } | |
1154 | else | |
1155 | { | |
f888a3fb | 1156 | /* Global declaration, e.g. intrinsic subroutine. */ |
4ee9c684 | 1157 | DECL_CONTEXT (fndecl) = NULL_TREE; |
1158 | } | |
1159 | ||
1160 | DECL_EXTERNAL (fndecl) = 1; | |
1161 | ||
f888a3fb | 1162 | /* This specifies if a function is globally addressable, i.e. it is |
4ee9c684 | 1163 | the opposite of declaring static in C. */ |
1164 | TREE_PUBLIC (fndecl) = 1; | |
1165 | ||
1166 | /* Set attributes for PURE functions. A call to PURE function in the | |
1167 | Fortran 95 sense is both pure and without side effects in the C | |
1168 | sense. */ | |
1169 | if (sym->attr.pure || sym->attr.elemental) | |
1170 | { | |
4d4b9f0e | 1171 | if (sym->attr.function && !gfc_return_by_reference (sym)) |
be393645 | 1172 | DECL_IS_PURE (fndecl) = 1; |
1173 | /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT) | |
1174 | parameters and don't use alternate returns (is this | |
1175 | allowed?). In that case, calls to them are meaningless, and | |
1b716045 | 1176 | can be optimized away. See also in build_function_decl(). */ |
be393645 | 1177 | TREE_SIDE_EFFECTS (fndecl) = 0; |
4ee9c684 | 1178 | } |
1179 | ||
6e27d773 | 1180 | /* Mark non-returning functions. */ |
1181 | if (sym->attr.noreturn) | |
1182 | TREE_THIS_VOLATILE(fndecl) = 1; | |
1183 | ||
4ee9c684 | 1184 | sym->backend_decl = fndecl; |
1185 | ||
1186 | if (DECL_CONTEXT (fndecl) == NULL_TREE) | |
1187 | pushdecl_top_level (fndecl); | |
1188 | ||
1189 | return fndecl; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | /* Create a declaration for a procedure. For external functions (in the C | |
1b716045 | 1194 | sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is |
1195 | a master function with alternate entry points. */ | |
4ee9c684 | 1196 | |
1b716045 | 1197 | static void |
1198 | build_function_decl (gfc_symbol * sym) | |
4ee9c684 | 1199 | { |
1b716045 | 1200 | tree fndecl, type; |
4ee9c684 | 1201 | symbol_attribute attr; |
1b716045 | 1202 | tree result_decl; |
4ee9c684 | 1203 | gfc_formal_arglist *f; |
1204 | ||
22d678e8 | 1205 | gcc_assert (!sym->backend_decl); |
1206 | gcc_assert (!sym->attr.external); | |
4ee9c684 | 1207 | |
b31f705b | 1208 | /* Set the line and filename. sym->declared_at seems to point to the |
1209 | last statement for subroutines, but it'll do for now. */ | |
1210 | gfc_set_backend_locus (&sym->declared_at); | |
1211 | ||
4ee9c684 | 1212 | /* Allow only one nesting level. Allow public declarations. */ |
22d678e8 | 1213 | gcc_assert (current_function_decl == NULL_TREE |
4ee9c684 | 1214 | || DECL_CONTEXT (current_function_decl) == NULL_TREE); |
1215 | ||
1216 | type = gfc_get_function_type (sym); | |
1217 | fndecl = build_decl (FUNCTION_DECL, gfc_sym_identifier (sym), type); | |
1218 | ||
1219 | /* Perform name mangling if this is a top level or module procedure. */ | |
1220 | if (current_function_decl == NULL_TREE) | |
1221 | SET_DECL_ASSEMBLER_NAME (fndecl, gfc_sym_mangled_function_id (sym)); | |
1222 | ||
1223 | /* Figure out the return type of the declared function, and build a | |
f888a3fb | 1224 | RESULT_DECL for it. If this is a subroutine with alternate |
4ee9c684 | 1225 | returns, build a RESULT_DECL for it. */ |
1226 | attr = sym->attr; | |
1227 | ||
1228 | result_decl = NULL_TREE; | |
1229 | /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */ | |
1230 | if (attr.function) | |
1231 | { | |
1232 | if (gfc_return_by_reference (sym)) | |
1233 | type = void_type_node; | |
1234 | else | |
1235 | { | |
1236 | if (sym->result != sym) | |
1237 | result_decl = gfc_sym_identifier (sym->result); | |
1238 | ||
1239 | type = TREE_TYPE (TREE_TYPE (fndecl)); | |
1240 | } | |
1241 | } | |
1242 | else | |
1243 | { | |
1244 | /* Look for alternate return placeholders. */ | |
1245 | int has_alternate_returns = 0; | |
1246 | for (f = sym->formal; f; f = f->next) | |
1247 | { | |
1248 | if (f->sym == NULL) | |
1249 | { | |
1250 | has_alternate_returns = 1; | |
1251 | break; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | if (has_alternate_returns) | |
1256 | type = integer_type_node; | |
1257 | else | |
1258 | type = void_type_node; | |
1259 | } | |
1260 | ||
1261 | result_decl = build_decl (RESULT_DECL, result_decl, type); | |
540edea7 | 1262 | DECL_ARTIFICIAL (result_decl) = 1; |
1263 | DECL_IGNORED_P (result_decl) = 1; | |
4ee9c684 | 1264 | DECL_CONTEXT (result_decl) = fndecl; |
1265 | DECL_RESULT (fndecl) = result_decl; | |
1266 | ||
1267 | /* Don't call layout_decl for a RESULT_DECL. | |
f888a3fb | 1268 | layout_decl (result_decl, 0); */ |
4ee9c684 | 1269 | |
1270 | /* If the return type is a pointer, avoid alias issues by setting | |
1271 | DECL_IS_MALLOC to nonzero. This means that the function should be | |
1272 | treated as if it were a malloc, meaning it returns a pointer that | |
1273 | is not an alias. */ | |
1274 | if (POINTER_TYPE_P (type)) | |
1275 | DECL_IS_MALLOC (fndecl) = 1; | |
1276 | ||
1277 | /* Set up all attributes for the function. */ | |
1278 | DECL_CONTEXT (fndecl) = current_function_decl; | |
1279 | DECL_EXTERNAL (fndecl) = 0; | |
1280 | ||
9d138f47 | 1281 | /* This specifies if a function is globally visible, i.e. it is |
dfc222eb | 1282 | the opposite of declaring static in C. */ |
1b716045 | 1283 | if (DECL_CONTEXT (fndecl) == NULL_TREE |
1284 | && !sym->attr.entry_master) | |
4ee9c684 | 1285 | TREE_PUBLIC (fndecl) = 1; |
1286 | ||
1287 | /* TREE_STATIC means the function body is defined here. */ | |
e4b2c26c | 1288 | TREE_STATIC (fndecl) = 1; |
4ee9c684 | 1289 | |
f888a3fb | 1290 | /* Set attributes for PURE functions. A call to a PURE function in the |
4ee9c684 | 1291 | Fortran 95 sense is both pure and without side effects in the C |
1292 | sense. */ | |
1293 | if (attr.pure || attr.elemental) | |
1294 | { | |
be393645 | 1295 | /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments |
a0527218 | 1296 | including an alternate return. In that case it can also be |
231e961a | 1297 | marked as PURE. See also in gfc_get_extern_function_decl(). */ |
4c319962 | 1298 | if (attr.function && !gfc_return_by_reference (sym)) |
be393645 | 1299 | DECL_IS_PURE (fndecl) = 1; |
4ee9c684 | 1300 | TREE_SIDE_EFFECTS (fndecl) = 0; |
1301 | } | |
1302 | ||
1303 | /* Layout the function declaration and put it in the binding level | |
1304 | of the current function. */ | |
e4b2c26c | 1305 | pushdecl (fndecl); |
1b716045 | 1306 | |
1307 | sym->backend_decl = fndecl; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | /* Create the DECL_ARGUMENTS for a procedure. */ | |
1312 | ||
1313 | static void | |
1314 | create_function_arglist (gfc_symbol * sym) | |
1315 | { | |
1316 | tree fndecl; | |
1317 | gfc_formal_arglist *f; | |
d4163395 | 1318 | tree typelist, hidden_typelist; |
1319 | tree arglist, hidden_arglist; | |
1b716045 | 1320 | tree type; |
1321 | tree parm; | |
1322 | ||
1323 | fndecl = sym->backend_decl; | |
1324 | ||
e4b2c26c | 1325 | /* Build formal argument list. Make sure that their TREE_CONTEXT is |
1326 | the new FUNCTION_DECL node. */ | |
e4b2c26c | 1327 | arglist = NULL_TREE; |
d4163395 | 1328 | hidden_arglist = NULL_TREE; |
e4b2c26c | 1329 | typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); |
1b716045 | 1330 | |
1331 | if (sym->attr.entry_master) | |
1332 | { | |
1333 | type = TREE_VALUE (typelist); | |
1334 | parm = build_decl (PARM_DECL, get_identifier ("__entry"), type); | |
1335 | ||
1336 | DECL_CONTEXT (parm) = fndecl; | |
1337 | DECL_ARG_TYPE (parm) = type; | |
1338 | TREE_READONLY (parm) = 1; | |
b9c7fce7 | 1339 | gfc_finish_decl (parm); |
d95efb59 | 1340 | DECL_ARTIFICIAL (parm) = 1; |
1b716045 | 1341 | |
1342 | arglist = chainon (arglist, parm); | |
1343 | typelist = TREE_CHAIN (typelist); | |
1344 | } | |
1345 | ||
e4b2c26c | 1346 | if (gfc_return_by_reference (sym)) |
4ee9c684 | 1347 | { |
d4163395 | 1348 | tree type = TREE_VALUE (typelist), length = NULL; |
4ee9c684 | 1349 | |
e4b2c26c | 1350 | if (sym->ts.type == BT_CHARACTER) |
1351 | { | |
e4b2c26c | 1352 | /* Length of character result. */ |
d4163395 | 1353 | tree len_type = TREE_VALUE (TREE_CHAIN (typelist)); |
1354 | gcc_assert (len_type == gfc_charlen_type_node); | |
4ee9c684 | 1355 | |
e4b2c26c | 1356 | length = build_decl (PARM_DECL, |
1357 | get_identifier (".__result"), | |
d4163395 | 1358 | len_type); |
e4b2c26c | 1359 | if (!sym->ts.cl->length) |
1360 | { | |
1361 | sym->ts.cl->backend_decl = length; | |
1362 | TREE_USED (length) = 1; | |
4ee9c684 | 1363 | } |
22d678e8 | 1364 | gcc_assert (TREE_CODE (length) == PARM_DECL); |
e4b2c26c | 1365 | DECL_CONTEXT (length) = fndecl; |
d4163395 | 1366 | DECL_ARG_TYPE (length) = len_type; |
e4b2c26c | 1367 | TREE_READONLY (length) = 1; |
b5b40b3f | 1368 | DECL_ARTIFICIAL (length) = 1; |
b9c7fce7 | 1369 | gfc_finish_decl (length); |
d4163395 | 1370 | if (sym->ts.cl->backend_decl == NULL |
1371 | || sym->ts.cl->backend_decl == length) | |
1372 | { | |
1373 | gfc_symbol *arg; | |
1374 | tree backend_decl; | |
4ee9c684 | 1375 | |
d4163395 | 1376 | if (sym->ts.cl->backend_decl == NULL) |
1377 | { | |
1378 | tree len = build_decl (VAR_DECL, | |
1379 | get_identifier ("..__result"), | |
1380 | gfc_charlen_type_node); | |
1381 | DECL_ARTIFICIAL (len) = 1; | |
1382 | TREE_USED (len) = 1; | |
1383 | sym->ts.cl->backend_decl = len; | |
1384 | } | |
4ee9c684 | 1385 | |
d4163395 | 1386 | /* Make sure PARM_DECL type doesn't point to incomplete type. */ |
1387 | arg = sym->result ? sym->result : sym; | |
1388 | backend_decl = arg->backend_decl; | |
1389 | /* Temporary clear it, so that gfc_sym_type creates complete | |
1390 | type. */ | |
1391 | arg->backend_decl = NULL; | |
1392 | type = gfc_sym_type (arg); | |
1393 | arg->backend_decl = backend_decl; | |
1394 | type = build_reference_type (type); | |
1395 | } | |
1396 | } | |
4ee9c684 | 1397 | |
d4163395 | 1398 | parm = build_decl (PARM_DECL, get_identifier ("__result"), type); |
4ee9c684 | 1399 | |
d4163395 | 1400 | DECL_CONTEXT (parm) = fndecl; |
1401 | DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); | |
1402 | TREE_READONLY (parm) = 1; | |
1403 | DECL_ARTIFICIAL (parm) = 1; | |
b9c7fce7 | 1404 | gfc_finish_decl (parm); |
4ee9c684 | 1405 | |
d4163395 | 1406 | arglist = chainon (arglist, parm); |
1407 | typelist = TREE_CHAIN (typelist); | |
4ee9c684 | 1408 | |
d4163395 | 1409 | if (sym->ts.type == BT_CHARACTER) |
1410 | { | |
1411 | gfc_allocate_lang_decl (parm); | |
1412 | arglist = chainon (arglist, length); | |
e4b2c26c | 1413 | typelist = TREE_CHAIN (typelist); |
1414 | } | |
1415 | } | |
4ee9c684 | 1416 | |
d4163395 | 1417 | hidden_typelist = typelist; |
1418 | for (f = sym->formal; f; f = f->next) | |
1419 | if (f->sym != NULL) /* Ignore alternate returns. */ | |
1420 | hidden_typelist = TREE_CHAIN (hidden_typelist); | |
1421 | ||
e4b2c26c | 1422 | for (f = sym->formal; f; f = f->next) |
1423 | { | |
1424 | char name[GFC_MAX_SYMBOL_LEN + 2]; | |
d4163395 | 1425 | |
e4b2c26c | 1426 | /* Ignore alternate returns. */ |
1427 | if (f->sym == NULL) | |
1428 | continue; | |
4ee9c684 | 1429 | |
e4b2c26c | 1430 | type = TREE_VALUE (typelist); |
4ee9c684 | 1431 | |
d4163395 | 1432 | if (f->sym->ts.type == BT_CHARACTER) |
1433 | { | |
1434 | tree len_type = TREE_VALUE (hidden_typelist); | |
1435 | tree length = NULL_TREE; | |
1436 | gcc_assert (len_type == gfc_charlen_type_node); | |
1437 | ||
1438 | strcpy (&name[1], f->sym->name); | |
1439 | name[0] = '_'; | |
1440 | length = build_decl (PARM_DECL, get_identifier (name), len_type); | |
4ee9c684 | 1441 | |
d4163395 | 1442 | hidden_arglist = chainon (hidden_arglist, length); |
1443 | DECL_CONTEXT (length) = fndecl; | |
1444 | DECL_ARTIFICIAL (length) = 1; | |
1445 | DECL_ARG_TYPE (length) = len_type; | |
1446 | TREE_READONLY (length) = 1; | |
b9c7fce7 | 1447 | gfc_finish_decl (length); |
4ee9c684 | 1448 | |
d4163395 | 1449 | /* TODO: Check string lengths when -fbounds-check. */ |
4ee9c684 | 1450 | |
d4163395 | 1451 | /* Use the passed value for assumed length variables. */ |
1452 | if (!f->sym->ts.cl->length) | |
4ee9c684 | 1453 | { |
d4163395 | 1454 | TREE_USED (length) = 1; |
1455 | if (!f->sym->ts.cl->backend_decl) | |
1456 | f->sym->ts.cl->backend_decl = length; | |
1457 | else | |
1458 | { | |
1459 | /* there is already another variable using this | |
1460 | gfc_charlen node, build a new one for this variable | |
1461 | and chain it into the list of gfc_charlens. | |
1462 | This happens for e.g. in the case | |
1463 | CHARACTER(*)::c1,c2 | |
1464 | since CHARACTER declarations on the same line share | |
1465 | the same gfc_charlen node. */ | |
1466 | gfc_charlen *cl; | |
e4b2c26c | 1467 | |
d4163395 | 1468 | cl = gfc_get_charlen (); |
1469 | cl->backend_decl = length; | |
1470 | cl->next = f->sym->ts.cl->next; | |
1471 | f->sym->ts.cl->next = cl; | |
1472 | f->sym->ts.cl = cl; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | hidden_typelist = TREE_CHAIN (hidden_typelist); | |
1477 | ||
1478 | if (f->sym->ts.cl->backend_decl == NULL | |
1479 | || f->sym->ts.cl->backend_decl == length) | |
1480 | { | |
1481 | if (f->sym->ts.cl->backend_decl == NULL) | |
1482 | gfc_create_string_length (f->sym); | |
1483 | ||
1484 | /* Make sure PARM_DECL type doesn't point to incomplete type. */ | |
1485 | if (f->sym->attr.flavor == FL_PROCEDURE) | |
1486 | type = build_pointer_type (gfc_get_function_type (f->sym)); | |
1487 | else | |
1488 | type = gfc_sym_type (f->sym); | |
4ee9c684 | 1489 | } |
4ee9c684 | 1490 | } |
1491 | ||
d4163395 | 1492 | /* For non-constant length array arguments, make sure they use |
1493 | a different type node from TYPE_ARG_TYPES type. */ | |
1494 | if (f->sym->attr.dimension | |
1495 | && type == TREE_VALUE (typelist) | |
1496 | && TREE_CODE (type) == POINTER_TYPE | |
1497 | && GFC_ARRAY_TYPE_P (type) | |
1498 | && f->sym->as->type != AS_ASSUMED_SIZE | |
1499 | && ! COMPLETE_TYPE_P (TREE_TYPE (type))) | |
1500 | { | |
1501 | if (f->sym->attr.flavor == FL_PROCEDURE) | |
1502 | type = build_pointer_type (gfc_get_function_type (f->sym)); | |
1503 | else | |
1504 | type = gfc_sym_type (f->sym); | |
1505 | } | |
1506 | ||
1507 | /* Build a the argument declaration. */ | |
1508 | parm = build_decl (PARM_DECL, gfc_sym_identifier (f->sym), type); | |
1509 | ||
1510 | /* Fill in arg stuff. */ | |
1511 | DECL_CONTEXT (parm) = fndecl; | |
1512 | DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); | |
1513 | /* All implementation args are read-only. */ | |
1514 | TREE_READONLY (parm) = 1; | |
1515 | ||
b9c7fce7 | 1516 | gfc_finish_decl (parm); |
d4163395 | 1517 | |
1518 | f->sym->backend_decl = parm; | |
1519 | ||
1520 | arglist = chainon (arglist, parm); | |
e4b2c26c | 1521 | typelist = TREE_CHAIN (typelist); |
4ee9c684 | 1522 | } |
e4b2c26c | 1523 | |
d4163395 | 1524 | /* Add the hidden string length parameters. */ |
1525 | arglist = chainon (arglist, hidden_arglist); | |
1526 | ||
ebe27ea2 | 1527 | gcc_assert (hidden_typelist == NULL_TREE |
1528 | || TREE_VALUE (hidden_typelist) == void_type_node); | |
e4b2c26c | 1529 | DECL_ARGUMENTS (fndecl) = arglist; |
1b716045 | 1530 | } |
e4b2c26c | 1531 | |
1b716045 | 1532 | /* Convert FNDECL's code to GIMPLE and handle any nested functions. */ |
1533 | ||
1534 | static void | |
1535 | gfc_gimplify_function (tree fndecl) | |
1536 | { | |
1537 | struct cgraph_node *cgn; | |
1538 | ||
1539 | gimplify_function_tree (fndecl); | |
1540 | dump_function (TDI_generic, fndecl); | |
1541 | ||
764f1175 | 1542 | /* Generate errors for structured block violations. */ |
1543 | /* ??? Could be done as part of resolve_labels. */ | |
1544 | if (flag_openmp) | |
1545 | diagnose_omp_structured_block_errors (fndecl); | |
1546 | ||
1b716045 | 1547 | /* Convert all nested functions to GIMPLE now. We do things in this order |
1548 | so that items like VLA sizes are expanded properly in the context of the | |
1549 | correct function. */ | |
1550 | cgn = cgraph_node (fndecl); | |
1551 | for (cgn = cgn->nested; cgn; cgn = cgn->next_nested) | |
1552 | gfc_gimplify_function (cgn->decl); | |
1553 | } | |
1554 | ||
1555 | ||
1556 | /* Do the setup necessary before generating the body of a function. */ | |
1557 | ||
1558 | static void | |
1559 | trans_function_start (gfc_symbol * sym) | |
1560 | { | |
1561 | tree fndecl; | |
1562 | ||
1563 | fndecl = sym->backend_decl; | |
1564 | ||
f888a3fb | 1565 | /* Let GCC know the current scope is this function. */ |
1b716045 | 1566 | current_function_decl = fndecl; |
1567 | ||
f888a3fb | 1568 | /* Let the world know what we're about to do. */ |
1b716045 | 1569 | announce_function (fndecl); |
1570 | ||
1571 | if (DECL_CONTEXT (fndecl) == NULL_TREE) | |
1572 | { | |
f888a3fb | 1573 | /* Create RTL for function declaration. */ |
1b716045 | 1574 | rest_of_decl_compilation (fndecl, 1, 0); |
1575 | } | |
1576 | ||
f888a3fb | 1577 | /* Create RTL for function definition. */ |
1b716045 | 1578 | make_decl_rtl (fndecl); |
1579 | ||
1b716045 | 1580 | init_function_start (fndecl); |
1581 | ||
1582 | /* Even though we're inside a function body, we still don't want to | |
1583 | call expand_expr to calculate the size of a variable-sized array. | |
1584 | We haven't necessarily assigned RTL to all variables yet, so it's | |
1585 | not safe to try to expand expressions involving them. */ | |
1586 | cfun->x_dont_save_pending_sizes_p = 1; | |
1587 | ||
f888a3fb | 1588 | /* function.c requires a push at the start of the function. */ |
1b716045 | 1589 | pushlevel (0); |
1590 | } | |
1591 | ||
1592 | /* Create thunks for alternate entry points. */ | |
1593 | ||
1594 | static void | |
1595 | build_entry_thunks (gfc_namespace * ns) | |
1596 | { | |
1597 | gfc_formal_arglist *formal; | |
1598 | gfc_formal_arglist *thunk_formal; | |
1599 | gfc_entry_list *el; | |
1600 | gfc_symbol *thunk_sym; | |
1601 | stmtblock_t body; | |
1602 | tree thunk_fndecl; | |
1603 | tree args; | |
1604 | tree string_args; | |
1605 | tree tmp; | |
b31f705b | 1606 | locus old_loc; |
1b716045 | 1607 | |
1608 | /* This should always be a toplevel function. */ | |
22d678e8 | 1609 | gcc_assert (current_function_decl == NULL_TREE); |
1b716045 | 1610 | |
b31f705b | 1611 | gfc_get_backend_locus (&old_loc); |
1b716045 | 1612 | for (el = ns->entries; el; el = el->next) |
1613 | { | |
1614 | thunk_sym = el->sym; | |
1615 | ||
1616 | build_function_decl (thunk_sym); | |
1617 | create_function_arglist (thunk_sym); | |
1618 | ||
1619 | trans_function_start (thunk_sym); | |
1620 | ||
1621 | thunk_fndecl = thunk_sym->backend_decl; | |
1622 | ||
1623 | gfc_start_block (&body); | |
1624 | ||
f888a3fb | 1625 | /* Pass extra parameter identifying this entry point. */ |
7016c612 | 1626 | tmp = build_int_cst (gfc_array_index_type, el->id); |
1b716045 | 1627 | args = tree_cons (NULL_TREE, tmp, NULL_TREE); |
1628 | string_args = NULL_TREE; | |
1629 | ||
c6871095 | 1630 | if (thunk_sym->attr.function) |
1631 | { | |
1632 | if (gfc_return_by_reference (ns->proc_name)) | |
1633 | { | |
1634 | tree ref = DECL_ARGUMENTS (current_function_decl); | |
1635 | args = tree_cons (NULL_TREE, ref, args); | |
1636 | if (ns->proc_name->ts.type == BT_CHARACTER) | |
1637 | args = tree_cons (NULL_TREE, TREE_CHAIN (ref), | |
1638 | args); | |
1639 | } | |
1640 | } | |
1641 | ||
1b716045 | 1642 | for (formal = ns->proc_name->formal; formal; formal = formal->next) |
1643 | { | |
c6871095 | 1644 | /* Ignore alternate returns. */ |
1645 | if (formal->sym == NULL) | |
1646 | continue; | |
1647 | ||
1b716045 | 1648 | /* We don't have a clever way of identifying arguments, so resort to |
1649 | a brute-force search. */ | |
1650 | for (thunk_formal = thunk_sym->formal; | |
1651 | thunk_formal; | |
1652 | thunk_formal = thunk_formal->next) | |
1653 | { | |
1654 | if (thunk_formal->sym == formal->sym) | |
1655 | break; | |
1656 | } | |
1657 | ||
1658 | if (thunk_formal) | |
1659 | { | |
1660 | /* Pass the argument. */ | |
d95efb59 | 1661 | DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1; |
1b716045 | 1662 | args = tree_cons (NULL_TREE, thunk_formal->sym->backend_decl, |
1663 | args); | |
1664 | if (formal->sym->ts.type == BT_CHARACTER) | |
1665 | { | |
1666 | tmp = thunk_formal->sym->ts.cl->backend_decl; | |
1667 | string_args = tree_cons (NULL_TREE, tmp, string_args); | |
1668 | } | |
1669 | } | |
1670 | else | |
1671 | { | |
1672 | /* Pass NULL for a missing argument. */ | |
1673 | args = tree_cons (NULL_TREE, null_pointer_node, args); | |
1674 | if (formal->sym->ts.type == BT_CHARACTER) | |
1675 | { | |
7d3075f6 | 1676 | tmp = build_int_cst (gfc_charlen_type_node, 0); |
1b716045 | 1677 | string_args = tree_cons (NULL_TREE, tmp, string_args); |
1678 | } | |
1679 | } | |
1680 | } | |
1681 | ||
1682 | /* Call the master function. */ | |
1683 | args = nreverse (args); | |
1684 | args = chainon (args, nreverse (string_args)); | |
1685 | tmp = ns->proc_name->backend_decl; | |
ac47d547 | 1686 | tmp = build_function_call_expr (tmp, args); |
c6871095 | 1687 | if (ns->proc_name->attr.mixed_entry_master) |
1688 | { | |
1689 | tree union_decl, field; | |
1690 | tree master_type = TREE_TYPE (ns->proc_name->backend_decl); | |
1691 | ||
1692 | union_decl = build_decl (VAR_DECL, get_identifier ("__result"), | |
1693 | TREE_TYPE (master_type)); | |
1694 | DECL_ARTIFICIAL (union_decl) = 1; | |
1695 | DECL_EXTERNAL (union_decl) = 0; | |
1696 | TREE_PUBLIC (union_decl) = 0; | |
1697 | TREE_USED (union_decl) = 1; | |
1698 | layout_decl (union_decl, 0); | |
1699 | pushdecl (union_decl); | |
1700 | ||
1701 | DECL_CONTEXT (union_decl) = current_function_decl; | |
1702 | tmp = build2 (MODIFY_EXPR, | |
1703 | TREE_TYPE (union_decl), | |
1704 | union_decl, tmp); | |
1705 | gfc_add_expr_to_block (&body, tmp); | |
1706 | ||
1707 | for (field = TYPE_FIELDS (TREE_TYPE (union_decl)); | |
1708 | field; field = TREE_CHAIN (field)) | |
1709 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), | |
1710 | thunk_sym->result->name) == 0) | |
1711 | break; | |
1712 | gcc_assert (field != NULL_TREE); | |
1713 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), union_decl, field, | |
1714 | NULL_TREE); | |
1715 | tmp = build2 (MODIFY_EXPR, | |
1716 | TREE_TYPE (DECL_RESULT (current_function_decl)), | |
1717 | DECL_RESULT (current_function_decl), tmp); | |
1718 | tmp = build1_v (RETURN_EXPR, tmp); | |
1719 | } | |
1720 | else if (TREE_TYPE (DECL_RESULT (current_function_decl)) | |
1721 | != void_type_node) | |
1722 | { | |
1723 | tmp = build2 (MODIFY_EXPR, | |
1724 | TREE_TYPE (DECL_RESULT (current_function_decl)), | |
1725 | DECL_RESULT (current_function_decl), tmp); | |
1726 | tmp = build1_v (RETURN_EXPR, tmp); | |
1727 | } | |
1b716045 | 1728 | gfc_add_expr_to_block (&body, tmp); |
1729 | ||
1730 | /* Finish off this function and send it for code generation. */ | |
1731 | DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body); | |
1732 | poplevel (1, 0, 1); | |
1733 | BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl; | |
1734 | ||
1735 | /* Output the GENERIC tree. */ | |
1736 | dump_function (TDI_original, thunk_fndecl); | |
1737 | ||
1738 | /* Store the end of the function, so that we get good line number | |
1739 | info for the epilogue. */ | |
1740 | cfun->function_end_locus = input_location; | |
1741 | ||
1742 | /* We're leaving the context of this function, so zap cfun. | |
1743 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in | |
1744 | tree_rest_of_compilation. */ | |
1745 | cfun = NULL; | |
1746 | ||
1747 | current_function_decl = NULL_TREE; | |
1748 | ||
1749 | gfc_gimplify_function (thunk_fndecl); | |
9d95b2b0 | 1750 | cgraph_finalize_function (thunk_fndecl, false); |
1b716045 | 1751 | |
1752 | /* We share the symbols in the formal argument list with other entry | |
1753 | points and the master function. Clear them so that they are | |
1754 | recreated for each function. */ | |
1755 | for (formal = thunk_sym->formal; formal; formal = formal->next) | |
c6871095 | 1756 | if (formal->sym != NULL) /* Ignore alternate returns. */ |
1757 | { | |
1758 | formal->sym->backend_decl = NULL_TREE; | |
1759 | if (formal->sym->ts.type == BT_CHARACTER) | |
1760 | formal->sym->ts.cl->backend_decl = NULL_TREE; | |
1761 | } | |
1762 | ||
1763 | if (thunk_sym->attr.function) | |
1b716045 | 1764 | { |
c6871095 | 1765 | if (thunk_sym->ts.type == BT_CHARACTER) |
1766 | thunk_sym->ts.cl->backend_decl = NULL_TREE; | |
1767 | if (thunk_sym->result->ts.type == BT_CHARACTER) | |
1768 | thunk_sym->result->ts.cl->backend_decl = NULL_TREE; | |
1b716045 | 1769 | } |
1770 | } | |
b31f705b | 1771 | |
1772 | gfc_set_backend_locus (&old_loc); | |
1b716045 | 1773 | } |
1774 | ||
1775 | ||
1776 | /* Create a decl for a function, and create any thunks for alternate entry | |
1777 | points. */ | |
1778 | ||
1779 | void | |
1780 | gfc_create_function_decl (gfc_namespace * ns) | |
1781 | { | |
1782 | /* Create a declaration for the master function. */ | |
1783 | build_function_decl (ns->proc_name); | |
1784 | ||
f888a3fb | 1785 | /* Compile the entry thunks. */ |
1b716045 | 1786 | if (ns->entries) |
1787 | build_entry_thunks (ns); | |
1788 | ||
1789 | /* Now create the read argument list. */ | |
1790 | create_function_arglist (ns->proc_name); | |
1791 | } | |
1792 | ||
c750cc52 | 1793 | /* Return the decl used to hold the function return value. If |
3350e716 | 1794 | parent_flag is set, the context is the parent_scope. */ |
4ee9c684 | 1795 | |
1796 | tree | |
c750cc52 | 1797 | gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag) |
4ee9c684 | 1798 | { |
c750cc52 | 1799 | tree decl; |
1800 | tree length; | |
1801 | tree this_fake_result_decl; | |
1802 | tree this_function_decl; | |
4ee9c684 | 1803 | |
1804 | char name[GFC_MAX_SYMBOL_LEN + 10]; | |
1805 | ||
c750cc52 | 1806 | if (parent_flag) |
1807 | { | |
1808 | this_fake_result_decl = parent_fake_result_decl; | |
1809 | this_function_decl = DECL_CONTEXT (current_function_decl); | |
1810 | } | |
1811 | else | |
1812 | { | |
1813 | this_fake_result_decl = current_fake_result_decl; | |
1814 | this_function_decl = current_function_decl; | |
1815 | } | |
1816 | ||
c6871095 | 1817 | if (sym |
c750cc52 | 1818 | && sym->ns->proc_name->backend_decl == this_function_decl |
d4163395 | 1819 | && sym->ns->proc_name->attr.entry_master |
c6871095 | 1820 | && sym != sym->ns->proc_name) |
1821 | { | |
d4163395 | 1822 | tree t = NULL, var; |
c750cc52 | 1823 | if (this_fake_result_decl != NULL) |
1824 | for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t)) | |
d4163395 | 1825 | if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0) |
1826 | break; | |
1827 | if (t) | |
1828 | return TREE_VALUE (t); | |
c750cc52 | 1829 | decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag); |
1830 | ||
1831 | if (parent_flag) | |
1832 | this_fake_result_decl = parent_fake_result_decl; | |
1833 | else | |
1834 | this_fake_result_decl = current_fake_result_decl; | |
1835 | ||
d4163395 | 1836 | if (decl && sym->ns->proc_name->attr.mixed_entry_master) |
c6871095 | 1837 | { |
1838 | tree field; | |
1839 | ||
1840 | for (field = TYPE_FIELDS (TREE_TYPE (decl)); | |
1841 | field; field = TREE_CHAIN (field)) | |
1842 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), | |
1843 | sym->name) == 0) | |
1844 | break; | |
1845 | ||
1846 | gcc_assert (field != NULL_TREE); | |
1847 | decl = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, | |
1848 | NULL_TREE); | |
1849 | } | |
c750cc52 | 1850 | |
1851 | var = create_tmp_var_raw (TREE_TYPE (decl), sym->name); | |
1852 | if (parent_flag) | |
1853 | gfc_add_decl_to_parent_function (var); | |
1854 | else | |
1855 | gfc_add_decl_to_function (var); | |
1856 | ||
d4163395 | 1857 | SET_DECL_VALUE_EXPR (var, decl); |
1858 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
2cf330c4 | 1859 | GFC_DECL_RESULT (var) = 1; |
c750cc52 | 1860 | |
1861 | TREE_CHAIN (this_fake_result_decl) | |
1862 | = tree_cons (get_identifier (sym->name), var, | |
1863 | TREE_CHAIN (this_fake_result_decl)); | |
d4163395 | 1864 | return var; |
c6871095 | 1865 | } |
1866 | ||
c750cc52 | 1867 | if (this_fake_result_decl != NULL_TREE) |
1868 | return TREE_VALUE (this_fake_result_decl); | |
4ee9c684 | 1869 | |
1870 | /* Only when gfc_get_fake_result_decl is called by gfc_trans_return, | |
1871 | sym is NULL. */ | |
1872 | if (!sym) | |
1873 | return NULL_TREE; | |
1874 | ||
d4163395 | 1875 | if (sym->ts.type == BT_CHARACTER) |
4ee9c684 | 1876 | { |
d4163395 | 1877 | if (sym->ts.cl->backend_decl == NULL_TREE) |
1878 | length = gfc_create_string_length (sym); | |
1879 | else | |
1880 | length = sym->ts.cl->backend_decl; | |
1881 | if (TREE_CODE (length) == VAR_DECL | |
1882 | && DECL_CONTEXT (length) == NULL_TREE) | |
99042714 | 1883 | gfc_add_decl_to_function (length); |
4ee9c684 | 1884 | } |
1885 | ||
1886 | if (gfc_return_by_reference (sym)) | |
1887 | { | |
c750cc52 | 1888 | decl = DECL_ARGUMENTS (this_function_decl); |
c6871095 | 1889 | |
c750cc52 | 1890 | if (sym->ns->proc_name->backend_decl == this_function_decl |
c6871095 | 1891 | && sym->ns->proc_name->attr.entry_master) |
1892 | decl = TREE_CHAIN (decl); | |
4ee9c684 | 1893 | |
1894 | TREE_USED (decl) = 1; | |
1895 | if (sym->as) | |
1896 | decl = gfc_build_dummy_array_decl (sym, decl); | |
1897 | } | |
1898 | else | |
1899 | { | |
1900 | sprintf (name, "__result_%.20s", | |
c750cc52 | 1901 | IDENTIFIER_POINTER (DECL_NAME (this_function_decl))); |
4ee9c684 | 1902 | |
3350e716 | 1903 | if (!sym->attr.mixed_entry_master && sym->attr.function) |
1904 | decl = build_decl (VAR_DECL, get_identifier (name), | |
1905 | gfc_sym_type (sym)); | |
1906 | else | |
1907 | decl = build_decl (VAR_DECL, get_identifier (name), | |
1908 | TREE_TYPE (TREE_TYPE (this_function_decl))); | |
4ee9c684 | 1909 | DECL_ARTIFICIAL (decl) = 1; |
1910 | DECL_EXTERNAL (decl) = 0; | |
1911 | TREE_PUBLIC (decl) = 0; | |
1912 | TREE_USED (decl) = 1; | |
764f1175 | 1913 | GFC_DECL_RESULT (decl) = 1; |
a379e3a9 | 1914 | TREE_ADDRESSABLE (decl) = 1; |
4ee9c684 | 1915 | |
1916 | layout_decl (decl, 0); | |
1917 | ||
c750cc52 | 1918 | if (parent_flag) |
1919 | gfc_add_decl_to_parent_function (decl); | |
1920 | else | |
1921 | gfc_add_decl_to_function (decl); | |
4ee9c684 | 1922 | } |
1923 | ||
c750cc52 | 1924 | if (parent_flag) |
1925 | parent_fake_result_decl = build_tree_list (NULL, decl); | |
1926 | else | |
1927 | current_fake_result_decl = build_tree_list (NULL, decl); | |
4ee9c684 | 1928 | |
1929 | return decl; | |
1930 | } | |
1931 | ||
1932 | ||
1933 | /* Builds a function decl. The remaining parameters are the types of the | |
1934 | function arguments. Negative nargs indicates a varargs function. */ | |
1935 | ||
1936 | tree | |
1937 | gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...) | |
1938 | { | |
1939 | tree arglist; | |
1940 | tree argtype; | |
1941 | tree fntype; | |
1942 | tree fndecl; | |
1943 | va_list p; | |
1944 | int n; | |
1945 | ||
1946 | /* Library functions must be declared with global scope. */ | |
22d678e8 | 1947 | gcc_assert (current_function_decl == NULL_TREE); |
4ee9c684 | 1948 | |
1949 | va_start (p, nargs); | |
1950 | ||
1951 | ||
1952 | /* Create a list of the argument types. */ | |
1953 | for (arglist = NULL_TREE, n = abs (nargs); n > 0; n--) | |
1954 | { | |
1955 | argtype = va_arg (p, tree); | |
1956 | arglist = gfc_chainon_list (arglist, argtype); | |
1957 | } | |
1958 | ||
1959 | if (nargs >= 0) | |
1960 | { | |
1961 | /* Terminate the list. */ | |
1962 | arglist = gfc_chainon_list (arglist, void_type_node); | |
1963 | } | |
1964 | ||
1965 | /* Build the function type and decl. */ | |
1966 | fntype = build_function_type (rettype, arglist); | |
1967 | fndecl = build_decl (FUNCTION_DECL, name, fntype); | |
1968 | ||
1969 | /* Mark this decl as external. */ | |
1970 | DECL_EXTERNAL (fndecl) = 1; | |
1971 | TREE_PUBLIC (fndecl) = 1; | |
1972 | ||
1973 | va_end (p); | |
1974 | ||
1975 | pushdecl (fndecl); | |
1976 | ||
b2c4af5e | 1977 | rest_of_decl_compilation (fndecl, 1, 0); |
4ee9c684 | 1978 | |
1979 | return fndecl; | |
1980 | } | |
1981 | ||
1982 | static void | |
1983 | gfc_build_intrinsic_function_decls (void) | |
1984 | { | |
90ba9145 | 1985 | tree gfc_int4_type_node = gfc_get_int_type (4); |
1986 | tree gfc_int8_type_node = gfc_get_int_type (8); | |
920e54ef | 1987 | tree gfc_int16_type_node = gfc_get_int_type (16); |
90ba9145 | 1988 | tree gfc_logical4_type_node = gfc_get_logical_type (4); |
1989 | tree gfc_real4_type_node = gfc_get_real_type (4); | |
1990 | tree gfc_real8_type_node = gfc_get_real_type (8); | |
920e54ef | 1991 | tree gfc_real10_type_node = gfc_get_real_type (10); |
1992 | tree gfc_real16_type_node = gfc_get_real_type (16); | |
90ba9145 | 1993 | tree gfc_complex4_type_node = gfc_get_complex_type (4); |
1994 | tree gfc_complex8_type_node = gfc_get_complex_type (8); | |
920e54ef | 1995 | tree gfc_complex10_type_node = gfc_get_complex_type (10); |
1996 | tree gfc_complex16_type_node = gfc_get_complex_type (16); | |
90ba9145 | 1997 | |
4ee9c684 | 1998 | /* String functions. */ |
4ee9c684 | 1999 | gfor_fndecl_compare_string = |
2000 | gfc_build_library_function_decl (get_identifier (PREFIX("compare_string")), | |
2001 | gfc_int4_type_node, | |
2002 | 4, | |
9ad09405 | 2003 | gfc_charlen_type_node, pchar_type_node, |
2004 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 2005 | |
2006 | gfor_fndecl_concat_string = | |
2007 | gfc_build_library_function_decl (get_identifier (PREFIX("concat_string")), | |
2008 | void_type_node, | |
2009 | 6, | |
9ad09405 | 2010 | gfc_charlen_type_node, pchar_type_node, |
2011 | gfc_charlen_type_node, pchar_type_node, | |
2012 | gfc_charlen_type_node, pchar_type_node); | |
4ee9c684 | 2013 | |
2014 | gfor_fndecl_string_len_trim = | |
2015 | gfc_build_library_function_decl (get_identifier (PREFIX("string_len_trim")), | |
2016 | gfc_int4_type_node, | |
9ad09405 | 2017 | 2, gfc_charlen_type_node, |
4ee9c684 | 2018 | pchar_type_node); |
2019 | ||
2020 | gfor_fndecl_string_index = | |
2021 | gfc_build_library_function_decl (get_identifier (PREFIX("string_index")), | |
2022 | gfc_int4_type_node, | |
9ad09405 | 2023 | 5, gfc_charlen_type_node, pchar_type_node, |
2024 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 2025 | gfc_logical4_type_node); |
2026 | ||
2027 | gfor_fndecl_string_scan = | |
2028 | gfc_build_library_function_decl (get_identifier (PREFIX("string_scan")), | |
2029 | gfc_int4_type_node, | |
9ad09405 | 2030 | 5, gfc_charlen_type_node, pchar_type_node, |
2031 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 2032 | gfc_logical4_type_node); |
2033 | ||
2034 | gfor_fndecl_string_verify = | |
2035 | gfc_build_library_function_decl (get_identifier (PREFIX("string_verify")), | |
2036 | gfc_int4_type_node, | |
9ad09405 | 2037 | 5, gfc_charlen_type_node, pchar_type_node, |
2038 | gfc_charlen_type_node, pchar_type_node, | |
4ee9c684 | 2039 | gfc_logical4_type_node); |
2040 | ||
2041 | gfor_fndecl_string_trim = | |
2042 | gfc_build_library_function_decl (get_identifier (PREFIX("string_trim")), | |
2043 | void_type_node, | |
2044 | 4, | |
9ad09405 | 2045 | build_pointer_type (gfc_charlen_type_node), |
4ee9c684 | 2046 | ppvoid_type_node, |
9ad09405 | 2047 | gfc_charlen_type_node, |
4ee9c684 | 2048 | pchar_type_node); |
2049 | ||
dbc97b88 | 2050 | gfor_fndecl_ttynam = |
2051 | gfc_build_library_function_decl (get_identifier (PREFIX("ttynam")), | |
2052 | void_type_node, | |
2053 | 3, | |
2054 | pchar_type_node, | |
2055 | gfc_charlen_type_node, | |
36c921b9 | 2056 | integer_type_node); |
dbc97b88 | 2057 | |
b902b078 | 2058 | gfor_fndecl_fdate = |
2059 | gfc_build_library_function_decl (get_identifier (PREFIX("fdate")), | |
2060 | void_type_node, | |
2061 | 2, | |
2062 | pchar_type_node, | |
2063 | gfc_charlen_type_node); | |
2064 | ||
2065 | gfor_fndecl_ctime = | |
2066 | gfc_build_library_function_decl (get_identifier (PREFIX("ctime")), | |
2067 | void_type_node, | |
2068 | 3, | |
2069 | pchar_type_node, | |
2070 | gfc_charlen_type_node, | |
2071 | gfc_int8_type_node); | |
2072 | ||
4ee9c684 | 2073 | gfor_fndecl_adjustl = |
2074 | gfc_build_library_function_decl (get_identifier (PREFIX("adjustl")), | |
2075 | void_type_node, | |
2076 | 3, | |
2077 | pchar_type_node, | |
9ad09405 | 2078 | gfc_charlen_type_node, pchar_type_node); |
4ee9c684 | 2079 | |
2080 | gfor_fndecl_adjustr = | |
2081 | gfc_build_library_function_decl (get_identifier (PREFIX("adjustr")), | |
2082 | void_type_node, | |
2083 | 3, | |
2084 | pchar_type_node, | |
9ad09405 | 2085 | gfc_charlen_type_node, pchar_type_node); |
4ee9c684 | 2086 | |
2087 | gfor_fndecl_si_kind = | |
17000b91 | 2088 | gfc_build_library_function_decl (get_identifier |
2089 | (PREFIX("selected_int_kind")), | |
4ee9c684 | 2090 | gfc_int4_type_node, |
2091 | 1, | |
2092 | pvoid_type_node); | |
2093 | ||
2094 | gfor_fndecl_sr_kind = | |
17000b91 | 2095 | gfc_build_library_function_decl (get_identifier |
2096 | (PREFIX("selected_real_kind")), | |
4ee9c684 | 2097 | gfc_int4_type_node, |
2098 | 2, pvoid_type_node, | |
2099 | pvoid_type_node); | |
2100 | ||
4ee9c684 | 2101 | /* Power functions. */ |
76834664 | 2102 | { |
920e54ef | 2103 | tree ctype, rtype, itype, jtype; |
2104 | int rkind, ikind, jkind; | |
2105 | #define NIKINDS 3 | |
2106 | #define NRKINDS 4 | |
2107 | static int ikinds[NIKINDS] = {4, 8, 16}; | |
2108 | static int rkinds[NRKINDS] = {4, 8, 10, 16}; | |
2109 | char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */ | |
2110 | ||
2111 | for (ikind=0; ikind < NIKINDS; ikind++) | |
76834664 | 2112 | { |
920e54ef | 2113 | itype = gfc_get_int_type (ikinds[ikind]); |
2114 | ||
2115 | for (jkind=0; jkind < NIKINDS; jkind++) | |
2116 | { | |
2117 | jtype = gfc_get_int_type (ikinds[jkind]); | |
2118 | if (itype && jtype) | |
2119 | { | |
2120 | sprintf(name, PREFIX("pow_i%d_i%d"), ikinds[ikind], | |
2121 | ikinds[jkind]); | |
2122 | gfor_fndecl_math_powi[jkind][ikind].integer = | |
2123 | gfc_build_library_function_decl (get_identifier (name), | |
2124 | jtype, 2, jtype, itype); | |
2177d98b | 2125 | TREE_READONLY (gfor_fndecl_math_powi[jkind][ikind].integer) = 1; |
920e54ef | 2126 | } |
2127 | } | |
2128 | ||
2129 | for (rkind = 0; rkind < NRKINDS; rkind ++) | |
76834664 | 2130 | { |
920e54ef | 2131 | rtype = gfc_get_real_type (rkinds[rkind]); |
2132 | if (rtype && itype) | |
2133 | { | |
2134 | sprintf(name, PREFIX("pow_r%d_i%d"), rkinds[rkind], | |
2135 | ikinds[ikind]); | |
2136 | gfor_fndecl_math_powi[rkind][ikind].real = | |
2137 | gfc_build_library_function_decl (get_identifier (name), | |
2138 | rtype, 2, rtype, itype); | |
2177d98b | 2139 | TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].real) = 1; |
920e54ef | 2140 | } |
2141 | ||
2142 | ctype = gfc_get_complex_type (rkinds[rkind]); | |
2143 | if (ctype && itype) | |
2144 | { | |
2145 | sprintf(name, PREFIX("pow_c%d_i%d"), rkinds[rkind], | |
2146 | ikinds[ikind]); | |
2147 | gfor_fndecl_math_powi[rkind][ikind].cmplx = | |
2148 | gfc_build_library_function_decl (get_identifier (name), | |
2149 | ctype, 2,ctype, itype); | |
2177d98b | 2150 | TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1; |
920e54ef | 2151 | } |
76834664 | 2152 | } |
2153 | } | |
920e54ef | 2154 | #undef NIKINDS |
2155 | #undef NRKINDS | |
76834664 | 2156 | } |
2157 | ||
4ee9c684 | 2158 | gfor_fndecl_math_cpowf = |
2159 | gfc_build_library_function_decl (get_identifier ("cpowf"), | |
2160 | gfc_complex4_type_node, | |
2161 | 1, gfc_complex4_type_node); | |
2162 | gfor_fndecl_math_cpow = | |
2163 | gfc_build_library_function_decl (get_identifier ("cpow"), | |
2164 | gfc_complex8_type_node, | |
2165 | 1, gfc_complex8_type_node); | |
920e54ef | 2166 | if (gfc_complex10_type_node) |
2167 | gfor_fndecl_math_cpowl10 = | |
2168 | gfc_build_library_function_decl (get_identifier ("cpowl"), | |
2169 | gfc_complex10_type_node, 1, | |
2170 | gfc_complex10_type_node); | |
2171 | if (gfc_complex16_type_node) | |
2172 | gfor_fndecl_math_cpowl16 = | |
2173 | gfc_build_library_function_decl (get_identifier ("cpowl"), | |
2174 | gfc_complex16_type_node, 1, | |
2175 | gfc_complex16_type_node); | |
2176 | ||
4ee9c684 | 2177 | gfor_fndecl_math_ishftc4 = |
2178 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc4")), | |
2179 | gfc_int4_type_node, | |
2180 | 3, gfc_int4_type_node, | |
2181 | gfc_int4_type_node, gfc_int4_type_node); | |
2182 | gfor_fndecl_math_ishftc8 = | |
2183 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc8")), | |
2184 | gfc_int8_type_node, | |
2185 | 3, gfc_int8_type_node, | |
920e54ef | 2186 | gfc_int4_type_node, gfc_int4_type_node); |
2187 | if (gfc_int16_type_node) | |
2188 | gfor_fndecl_math_ishftc16 = | |
2189 | gfc_build_library_function_decl (get_identifier (PREFIX("ishftc16")), | |
2190 | gfc_int16_type_node, 3, | |
2191 | gfc_int16_type_node, | |
2192 | gfc_int4_type_node, | |
2193 | gfc_int4_type_node); | |
2194 | ||
4ee9c684 | 2195 | gfor_fndecl_math_exponent4 = |
2196 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r4")), | |
2197 | gfc_int4_type_node, | |
2198 | 1, gfc_real4_type_node); | |
2199 | gfor_fndecl_math_exponent8 = | |
2200 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r8")), | |
2201 | gfc_int4_type_node, | |
2202 | 1, gfc_real8_type_node); | |
920e54ef | 2203 | if (gfc_real10_type_node) |
2204 | gfor_fndecl_math_exponent10 = | |
2205 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r10")), | |
2206 | gfc_int4_type_node, 1, | |
2207 | gfc_real10_type_node); | |
2208 | if (gfc_real16_type_node) | |
2209 | gfor_fndecl_math_exponent16 = | |
2210 | gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r16")), | |
2211 | gfc_int4_type_node, 1, | |
2212 | gfc_real16_type_node); | |
4ee9c684 | 2213 | |
4e8e57b0 | 2214 | /* BLAS functions. */ |
2215 | { | |
36c921b9 | 2216 | tree pint = build_pointer_type (integer_type_node); |
4e8e57b0 | 2217 | tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind)); |
2218 | tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind)); | |
2219 | tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind)); | |
2220 | tree pz = build_pointer_type | |
2221 | (gfc_get_complex_type (gfc_default_double_kind)); | |
2222 | ||
2223 | gfor_fndecl_sgemm = gfc_build_library_function_decl | |
2224 | (get_identifier | |
2225 | (gfc_option.flag_underscoring ? "sgemm_" | |
2226 | : "sgemm"), | |
2227 | void_type_node, 15, pchar_type_node, | |
2228 | pchar_type_node, pint, pint, pint, ps, ps, pint, | |
36c921b9 | 2229 | ps, pint, ps, ps, pint, integer_type_node, |
2230 | integer_type_node); | |
4e8e57b0 | 2231 | gfor_fndecl_dgemm = gfc_build_library_function_decl |
2232 | (get_identifier | |
2233 | (gfc_option.flag_underscoring ? "dgemm_" | |
2234 | : "dgemm"), | |
2235 | void_type_node, 15, pchar_type_node, | |
2236 | pchar_type_node, pint, pint, pint, pd, pd, pint, | |
36c921b9 | 2237 | pd, pint, pd, pd, pint, integer_type_node, |
2238 | integer_type_node); | |
4e8e57b0 | 2239 | gfor_fndecl_cgemm = gfc_build_library_function_decl |
2240 | (get_identifier | |
2241 | (gfc_option.flag_underscoring ? "cgemm_" | |
2242 | : "cgemm"), | |
2243 | void_type_node, 15, pchar_type_node, | |
2244 | pchar_type_node, pint, pint, pint, pc, pc, pint, | |
36c921b9 | 2245 | pc, pint, pc, pc, pint, integer_type_node, |
2246 | integer_type_node); | |
4e8e57b0 | 2247 | gfor_fndecl_zgemm = gfc_build_library_function_decl |
2248 | (get_identifier | |
2249 | (gfc_option.flag_underscoring ? "zgemm_" | |
2250 | : "zgemm"), | |
2251 | void_type_node, 15, pchar_type_node, | |
2252 | pchar_type_node, pint, pint, pint, pz, pz, pint, | |
36c921b9 | 2253 | pz, pint, pz, pz, pint, integer_type_node, |
2254 | integer_type_node); | |
4e8e57b0 | 2255 | } |
2256 | ||
4ee9c684 | 2257 | /* Other functions. */ |
2258 | gfor_fndecl_size0 = | |
2259 | gfc_build_library_function_decl (get_identifier (PREFIX("size0")), | |
2260 | gfc_array_index_type, | |
2261 | 1, pvoid_type_node); | |
2262 | gfor_fndecl_size1 = | |
2263 | gfc_build_library_function_decl (get_identifier (PREFIX("size1")), | |
2264 | gfc_array_index_type, | |
2265 | 2, pvoid_type_node, | |
2266 | gfc_array_index_type); | |
9b057c29 | 2267 | |
2268 | gfor_fndecl_iargc = | |
2269 | gfc_build_library_function_decl (get_identifier (PREFIX ("iargc")), | |
2270 | gfc_int4_type_node, | |
2271 | 0); | |
4ee9c684 | 2272 | } |
2273 | ||
2274 | ||
2275 | /* Make prototypes for runtime library functions. */ | |
2276 | ||
2277 | void | |
2278 | gfc_build_builtin_function_decls (void) | |
2279 | { | |
90ba9145 | 2280 | tree gfc_int4_type_node = gfc_get_int_type (4); |
90ba9145 | 2281 | tree gfc_logical4_type_node = gfc_get_logical_type (4); |
8302a4a2 | 2282 | tree gfc_pint4_type_node = build_pointer_type (gfc_int4_type_node); |
90ba9145 | 2283 | |
9e1839e2 | 2284 | gfor_fndecl_internal_realloc = |
2285 | gfc_build_library_function_decl (get_identifier | |
2286 | (PREFIX("internal_realloc")), | |
2287 | pvoid_type_node, 2, pvoid_type_node, | |
ce8f0aea | 2288 | gfc_array_index_type); |
9e1839e2 | 2289 | |
4ee9c684 | 2290 | gfor_fndecl_allocate = |
2291 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate")), | |
dac9919d | 2292 | pvoid_type_node, 2, |
ce8f0aea | 2293 | gfc_array_index_type, gfc_pint4_type_node); |
dac9919d | 2294 | DECL_IS_MALLOC (gfor_fndecl_allocate) = 1; |
4ee9c684 | 2295 | |
8a92488f | 2296 | gfor_fndecl_allocate_array = |
2297 | gfc_build_library_function_decl (get_identifier (PREFIX("allocate_array")), | |
dac9919d | 2298 | pvoid_type_node, 3, pvoid_type_node, |
ce8f0aea | 2299 | gfc_array_index_type, gfc_pint4_type_node); |
dac9919d | 2300 | DECL_IS_MALLOC (gfor_fndecl_allocate_array) = 1; |
8a92488f | 2301 | |
4ee9c684 | 2302 | gfor_fndecl_deallocate = |
2303 | gfc_build_library_function_decl (get_identifier (PREFIX("deallocate")), | |
dac9919d | 2304 | void_type_node, 2, pvoid_type_node, |
8302a4a2 | 2305 | gfc_pint4_type_node); |
4ee9c684 | 2306 | |
2307 | gfor_fndecl_stop_numeric = | |
2308 | gfc_build_library_function_decl (get_identifier (PREFIX("stop_numeric")), | |
2309 | void_type_node, 1, gfc_int4_type_node); | |
2310 | ||
98ccec97 | 2311 | /* Stop doesn't return. */ |
2312 | TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1; | |
2313 | ||
4ee9c684 | 2314 | gfor_fndecl_stop_string = |
2315 | gfc_build_library_function_decl (get_identifier (PREFIX("stop_string")), | |
2316 | void_type_node, 2, pchar_type_node, | |
2317 | gfc_int4_type_node); | |
98ccec97 | 2318 | /* Stop doesn't return. */ |
2319 | TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1; | |
4ee9c684 | 2320 | |
2321 | gfor_fndecl_pause_numeric = | |
2322 | gfc_build_library_function_decl (get_identifier (PREFIX("pause_numeric")), | |
2323 | void_type_node, 1, gfc_int4_type_node); | |
2324 | ||
2325 | gfor_fndecl_pause_string = | |
2326 | gfc_build_library_function_decl (get_identifier (PREFIX("pause_string")), | |
2327 | void_type_node, 2, pchar_type_node, | |
2328 | gfc_int4_type_node); | |
2329 | ||
2330 | gfor_fndecl_select_string = | |
2331 | gfc_build_library_function_decl (get_identifier (PREFIX("select_string")), | |
36c921b9 | 2332 | integer_type_node, 0); |
4ee9c684 | 2333 | |
2334 | gfor_fndecl_runtime_error = | |
2335 | gfc_build_library_function_decl (get_identifier (PREFIX("runtime_error")), | |
97c2a00c | 2336 | void_type_node, 1, pchar_type_node); |
9c0f3811 | 2337 | /* The runtime_error function does not return. */ |
2338 | TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1; | |
4ee9c684 | 2339 | |
50ad5fa2 | 2340 | gfor_fndecl_runtime_error_at = |
2341 | gfc_build_library_function_decl (get_identifier (PREFIX("runtime_error_at")), | |
2342 | void_type_node, 2, pchar_type_node, | |
2343 | pchar_type_node); | |
2344 | /* The runtime_error_at function does not return. */ | |
2345 | TREE_THIS_VOLATILE (gfor_fndecl_runtime_error_at) = 1; | |
2346 | ||
2347 | gfor_fndecl_generate_error = | |
2348 | gfc_build_library_function_decl (get_identifier (PREFIX("generate_error")), | |
2349 | void_type_node, 3, pvoid_type_node, | |
36c921b9 | 2350 | integer_type_node, pchar_type_node); |
50ad5fa2 | 2351 | |
9915365e | 2352 | gfor_fndecl_os_error = |
2353 | gfc_build_library_function_decl (get_identifier (PREFIX("os_error")), | |
2354 | void_type_node, 1, pchar_type_node); | |
2355 | /* The runtime_error function does not return. */ | |
2356 | TREE_THIS_VOLATILE (gfor_fndecl_os_error) = 1; | |
2357 | ||
8c84a5de | 2358 | gfor_fndecl_set_fpe = |
2359 | gfc_build_library_function_decl (get_identifier (PREFIX("set_fpe")), | |
36c921b9 | 2360 | void_type_node, 1, integer_type_node); |
8c84a5de | 2361 | |
56c7c2d7 | 2362 | /* Keep the array dimension in sync with the call, later in this file. */ |
2363 | gfor_fndecl_set_options = | |
2364 | gfc_build_library_function_decl (get_identifier (PREFIX("set_options")), | |
36c921b9 | 2365 | void_type_node, 2, integer_type_node, |
56c7c2d7 | 2366 | pvoid_type_node); |
64fc3c4c | 2367 | |
15774a8b | 2368 | gfor_fndecl_set_convert = |
2369 | gfc_build_library_function_decl (get_identifier (PREFIX("set_convert")), | |
36c921b9 | 2370 | void_type_node, 1, integer_type_node); |
15774a8b | 2371 | |
f23886ab | 2372 | gfor_fndecl_set_record_marker = |
2373 | gfc_build_library_function_decl (get_identifier (PREFIX("set_record_marker")), | |
36c921b9 | 2374 | void_type_node, 1, integer_type_node); |
f23886ab | 2375 | |
bbaaa7b1 | 2376 | gfor_fndecl_set_max_subrecord_length = |
2377 | gfc_build_library_function_decl (get_identifier (PREFIX("set_max_subrecord_length")), | |
36c921b9 | 2378 | void_type_node, 1, integer_type_node); |
bbaaa7b1 | 2379 | |
4ee9c684 | 2380 | gfor_fndecl_in_pack = gfc_build_library_function_decl ( |
2381 | get_identifier (PREFIX("internal_pack")), | |
2382 | pvoid_type_node, 1, pvoid_type_node); | |
2383 | ||
2384 | gfor_fndecl_in_unpack = gfc_build_library_function_decl ( | |
2385 | get_identifier (PREFIX("internal_unpack")), | |
2386 | pvoid_type_node, 1, pvoid_type_node); | |
2387 | ||
2388 | gfor_fndecl_associated = | |
2389 | gfc_build_library_function_decl ( | |
2390 | get_identifier (PREFIX("associated")), | |
2391 | gfc_logical4_type_node, | |
2392 | 2, | |
2393 | ppvoid_type_node, | |
2394 | ppvoid_type_node); | |
2395 | ||
2396 | gfc_build_intrinsic_function_decls (); | |
2397 | gfc_build_intrinsic_lib_fndecls (); | |
2398 | gfc_build_io_library_fndecls (); | |
2399 | } | |
2400 | ||
2401 | ||
231e961a | 2402 | /* Evaluate the length of dummy character variables. */ |
4ee9c684 | 2403 | |
2404 | static tree | |
d4163395 | 2405 | gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl, tree fnbody) |
4ee9c684 | 2406 | { |
2407 | stmtblock_t body; | |
2408 | ||
b9c7fce7 | 2409 | gfc_finish_decl (cl->backend_decl); |
4ee9c684 | 2410 | |
2411 | gfc_start_block (&body); | |
2412 | ||
2413 | /* Evaluate the string length expression. */ | |
2414 | gfc_trans_init_string_length (cl, &body); | |
d4163395 | 2415 | |
2416 | gfc_trans_vla_type_sizes (sym, &body); | |
2417 | ||
4ee9c684 | 2418 | gfc_add_expr_to_block (&body, fnbody); |
2419 | return gfc_finish_block (&body); | |
2420 | } | |
2421 | ||
2422 | ||
2423 | /* Allocate and cleanup an automatic character variable. */ | |
2424 | ||
2425 | static tree | |
2426 | gfc_trans_auto_character_variable (gfc_symbol * sym, tree fnbody) | |
2427 | { | |
2428 | stmtblock_t body; | |
2429 | tree decl; | |
4ee9c684 | 2430 | tree tmp; |
2431 | ||
22d678e8 | 2432 | gcc_assert (sym->backend_decl); |
2433 | gcc_assert (sym->ts.cl && sym->ts.cl->length); | |
4ee9c684 | 2434 | |
2435 | gfc_start_block (&body); | |
2436 | ||
2437 | /* Evaluate the string length expression. */ | |
2438 | gfc_trans_init_string_length (sym->ts.cl, &body); | |
2439 | ||
d4163395 | 2440 | gfc_trans_vla_type_sizes (sym, &body); |
2441 | ||
4ee9c684 | 2442 | decl = sym->backend_decl; |
2443 | ||
afcf285e | 2444 | /* Emit a DECL_EXPR for this variable, which will cause the |
4b3a701c | 2445 | gimplifier to allocate storage, and all that good stuff. */ |
ed52ef8b | 2446 | tmp = build1 (DECL_EXPR, TREE_TYPE (decl), decl); |
4ee9c684 | 2447 | gfc_add_expr_to_block (&body, tmp); |
afcf285e | 2448 | |
4ee9c684 | 2449 | gfc_add_expr_to_block (&body, fnbody); |
2450 | return gfc_finish_block (&body); | |
2451 | } | |
2452 | ||
c8f1568f | 2453 | /* Set the initial value of ASSIGN statement auxiliary variable explicitly. */ |
2454 | ||
2455 | static tree | |
2456 | gfc_trans_assign_aux_var (gfc_symbol * sym, tree fnbody) | |
2457 | { | |
2458 | stmtblock_t body; | |
2459 | ||
2460 | gcc_assert (sym->backend_decl); | |
2461 | gfc_start_block (&body); | |
2462 | ||
2463 | /* Set the initial value to length. See the comments in | |
2464 | function gfc_add_assign_aux_vars in this file. */ | |
2465 | gfc_add_modify_expr (&body, GFC_DECL_STRING_LEN (sym->backend_decl), | |
2466 | build_int_cst (NULL_TREE, -2)); | |
2467 | ||
2468 | gfc_add_expr_to_block (&body, fnbody); | |
2469 | return gfc_finish_block (&body); | |
2470 | } | |
2471 | ||
d4163395 | 2472 | static void |
2473 | gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body) | |
2474 | { | |
2475 | tree t = *tp, var, val; | |
2476 | ||
2477 | if (t == NULL || t == error_mark_node) | |
2478 | return; | |
2479 | if (TREE_CONSTANT (t) || DECL_P (t)) | |
2480 | return; | |
2481 | ||
2482 | if (TREE_CODE (t) == SAVE_EXPR) | |
2483 | { | |
2484 | if (SAVE_EXPR_RESOLVED_P (t)) | |
2485 | { | |
2486 | *tp = TREE_OPERAND (t, 0); | |
2487 | return; | |
2488 | } | |
2489 | val = TREE_OPERAND (t, 0); | |
2490 | } | |
2491 | else | |
2492 | val = t; | |
2493 | ||
2494 | var = gfc_create_var_np (TREE_TYPE (t), NULL); | |
2495 | gfc_add_decl_to_function (var); | |
2496 | gfc_add_modify_expr (body, var, val); | |
2497 | if (TREE_CODE (t) == SAVE_EXPR) | |
2498 | TREE_OPERAND (t, 0) = var; | |
2499 | *tp = var; | |
2500 | } | |
2501 | ||
2502 | static void | |
2503 | gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body) | |
2504 | { | |
2505 | tree t; | |
2506 | ||
2507 | if (type == NULL || type == error_mark_node) | |
2508 | return; | |
2509 | ||
2510 | type = TYPE_MAIN_VARIANT (type); | |
2511 | ||
2512 | if (TREE_CODE (type) == INTEGER_TYPE) | |
2513 | { | |
2514 | gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body); | |
2515 | gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body); | |
2516 | ||
2517 | for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
2518 | { | |
2519 | TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type); | |
2520 | TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type); | |
2521 | } | |
2522 | } | |
2523 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
2524 | { | |
2525 | gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body); | |
2526 | gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body); | |
2527 | gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body); | |
2528 | gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body); | |
2529 | ||
2530 | for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
2531 | { | |
2532 | TYPE_SIZE (t) = TYPE_SIZE (type); | |
2533 | TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type); | |
2534 | } | |
2535 | } | |
2536 | } | |
2537 | ||
2538 | /* Make sure all type sizes and array domains are either constant, | |
2539 | or variable or parameter decls. This is a simplified variant | |
2540 | of gimplify_type_sizes, but we can't use it here, as none of the | |
2541 | variables in the expressions have been gimplified yet. | |
2542 | As type sizes and domains for various variable length arrays | |
2543 | contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars | |
2544 | time, without this routine gimplify_type_sizes in the middle-end | |
2545 | could result in the type sizes being gimplified earlier than where | |
2546 | those variables are initialized. */ | |
2547 | ||
2548 | void | |
2549 | gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body) | |
2550 | { | |
2551 | tree type = TREE_TYPE (sym->backend_decl); | |
2552 | ||
2553 | if (TREE_CODE (type) == FUNCTION_TYPE | |
2554 | && (sym->attr.function || sym->attr.result || sym->attr.entry)) | |
2555 | { | |
2556 | if (! current_fake_result_decl) | |
2557 | return; | |
2558 | ||
2559 | type = TREE_TYPE (TREE_VALUE (current_fake_result_decl)); | |
2560 | } | |
2561 | ||
2562 | while (POINTER_TYPE_P (type)) | |
2563 | type = TREE_TYPE (type); | |
2564 | ||
2565 | if (GFC_DESCRIPTOR_TYPE_P (type)) | |
2566 | { | |
2567 | tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type); | |
2568 | ||
2569 | while (POINTER_TYPE_P (etype)) | |
2570 | etype = TREE_TYPE (etype); | |
2571 | ||
2572 | gfc_trans_vla_type_sizes_1 (etype, body); | |
2573 | } | |
2574 | ||
2575 | gfc_trans_vla_type_sizes_1 (type, body); | |
2576 | } | |
2577 | ||
4ee9c684 | 2578 | |
2579 | /* Generate function entry and exit code, and add it to the function body. | |
2580 | This includes: | |
f888a3fb | 2581 | Allocation and initialization of array variables. |
4ee9c684 | 2582 | Allocation of character string variables. |
c8f1568f | 2583 | Initialization and possibly repacking of dummy arrays. |
2584 | Initialization of ASSIGN statement auxiliary variable. */ | |
4ee9c684 | 2585 | |
2586 | static tree | |
2587 | gfc_trans_deferred_vars (gfc_symbol * proc_sym, tree fnbody) | |
2588 | { | |
2589 | locus loc; | |
2590 | gfc_symbol *sym; | |
d4163395 | 2591 | gfc_formal_arglist *f; |
2592 | stmtblock_t body; | |
25dd7350 | 2593 | bool seen_trans_deferred_array = false; |
4ee9c684 | 2594 | |
2595 | /* Deal with implicit return variables. Explicit return variables will | |
2596 | already have been added. */ | |
2597 | if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym) | |
2598 | { | |
2599 | if (!current_fake_result_decl) | |
2600 | { | |
c6871095 | 2601 | gfc_entry_list *el = NULL; |
2602 | if (proc_sym->attr.entry_master) | |
2603 | { | |
2604 | for (el = proc_sym->ns->entries; el; el = el->next) | |
2605 | if (el->sym != el->sym->result) | |
2606 | break; | |
2607 | } | |
2608 | if (el == NULL) | |
2609 | warning (0, "Function does not return a value"); | |
4ee9c684 | 2610 | } |
c6871095 | 2611 | else if (proc_sym->as) |
4ee9c684 | 2612 | { |
d4163395 | 2613 | tree result = TREE_VALUE (current_fake_result_decl); |
2614 | fnbody = gfc_trans_dummy_array_bias (proc_sym, result, fnbody); | |
10b07432 | 2615 | |
2616 | /* An automatic character length, pointer array result. */ | |
2617 | if (proc_sym->ts.type == BT_CHARACTER | |
2618 | && TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL) | |
2619 | fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl, | |
2620 | fnbody); | |
4ee9c684 | 2621 | } |
2622 | else if (proc_sym->ts.type == BT_CHARACTER) | |
2623 | { | |
2624 | if (TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL) | |
d4163395 | 2625 | fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl, |
2626 | fnbody); | |
4ee9c684 | 2627 | } |
2628 | else | |
bdaed7d2 | 2629 | gcc_assert (gfc_option.flag_f2c |
2630 | && proc_sym->ts.type == BT_COMPLEX); | |
4ee9c684 | 2631 | } |
2632 | ||
2633 | for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink) | |
2634 | { | |
2294b616 | 2635 | bool sym_has_alloc_comp = (sym->ts.type == BT_DERIVED) |
2636 | && sym->ts.derived->attr.alloc_comp; | |
4ee9c684 | 2637 | if (sym->attr.dimension) |
2638 | { | |
2639 | switch (sym->as->type) | |
2640 | { | |
2641 | case AS_EXPLICIT: | |
2642 | if (sym->attr.dummy || sym->attr.result) | |
2643 | fnbody = | |
2644 | gfc_trans_dummy_array_bias (sym, sym->backend_decl, fnbody); | |
2645 | else if (sym->attr.pointer || sym->attr.allocatable) | |
2646 | { | |
2647 | if (TREE_STATIC (sym->backend_decl)) | |
2648 | gfc_trans_static_array_pointer (sym); | |
2649 | else | |
25dd7350 | 2650 | { |
2651 | seen_trans_deferred_array = true; | |
2652 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
2653 | } | |
4ee9c684 | 2654 | } |
2655 | else | |
2656 | { | |
25dd7350 | 2657 | if (sym_has_alloc_comp) |
2658 | { | |
2659 | seen_trans_deferred_array = true; | |
2660 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
2661 | } | |
2662 | ||
4ee9c684 | 2663 | gfc_get_backend_locus (&loc); |
2664 | gfc_set_backend_locus (&sym->declared_at); | |
2665 | fnbody = gfc_trans_auto_array_allocation (sym->backend_decl, | |
2666 | sym, fnbody); | |
2667 | gfc_set_backend_locus (&loc); | |
2668 | } | |
2669 | break; | |
2670 | ||
2671 | case AS_ASSUMED_SIZE: | |
2672 | /* Must be a dummy parameter. */ | |
22d678e8 | 2673 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 2674 | |
2675 | /* We should always pass assumed size arrays the g77 way. */ | |
4ee9c684 | 2676 | fnbody = gfc_trans_g77_array (sym, fnbody); |
2677 | break; | |
2678 | ||
2679 | case AS_ASSUMED_SHAPE: | |
2680 | /* Must be a dummy parameter. */ | |
22d678e8 | 2681 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 2682 | |
2683 | fnbody = gfc_trans_dummy_array_bias (sym, sym->backend_decl, | |
2684 | fnbody); | |
2685 | break; | |
2686 | ||
2687 | case AS_DEFERRED: | |
25dd7350 | 2688 | seen_trans_deferred_array = true; |
2689 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
4ee9c684 | 2690 | break; |
2691 | ||
2692 | default: | |
22d678e8 | 2693 | gcc_unreachable (); |
4ee9c684 | 2694 | } |
25dd7350 | 2695 | if (sym_has_alloc_comp && !seen_trans_deferred_array) |
2294b616 | 2696 | fnbody = gfc_trans_deferred_array (sym, fnbody); |
4ee9c684 | 2697 | } |
2294b616 | 2698 | else if (sym_has_alloc_comp) |
2699 | fnbody = gfc_trans_deferred_array (sym, fnbody); | |
4ee9c684 | 2700 | else if (sym->ts.type == BT_CHARACTER) |
2701 | { | |
2702 | gfc_get_backend_locus (&loc); | |
2703 | gfc_set_backend_locus (&sym->declared_at); | |
2704 | if (sym->attr.dummy || sym->attr.result) | |
d4163395 | 2705 | fnbody = gfc_trans_dummy_character (sym, sym->ts.cl, fnbody); |
4ee9c684 | 2706 | else |
2707 | fnbody = gfc_trans_auto_character_variable (sym, fnbody); | |
2708 | gfc_set_backend_locus (&loc); | |
2709 | } | |
c8f1568f | 2710 | else if (sym->attr.assign) |
2711 | { | |
2712 | gfc_get_backend_locus (&loc); | |
2713 | gfc_set_backend_locus (&sym->declared_at); | |
2714 | fnbody = gfc_trans_assign_aux_var (sym, fnbody); | |
2715 | gfc_set_backend_locus (&loc); | |
2716 | } | |
4ee9c684 | 2717 | else |
22d678e8 | 2718 | gcc_unreachable (); |
4ee9c684 | 2719 | } |
2720 | ||
d4163395 | 2721 | gfc_init_block (&body); |
2722 | ||
2723 | for (f = proc_sym->formal; f; f = f->next) | |
1e853e89 | 2724 | { |
2725 | if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER) | |
2726 | { | |
2727 | gcc_assert (f->sym->ts.cl->backend_decl != NULL); | |
2728 | if (TREE_CODE (f->sym->ts.cl->backend_decl) == PARM_DECL) | |
2729 | gfc_trans_vla_type_sizes (f->sym, &body); | |
2730 | } | |
2731 | ||
2732 | /* If an INTENT(OUT) dummy of derived type has a default | |
2733 | initializer, it must be initialized here. */ | |
5ef85f44 | 2734 | if (f->sym && f->sym->attr.intent == INTENT_OUT |
1e853e89 | 2735 | && f->sym->ts.type == BT_DERIVED |
2736 | && !f->sym->ts.derived->attr.alloc_comp | |
2737 | && f->sym->value) | |
2738 | { | |
2739 | gfc_expr *tmpe; | |
2740 | tree tmp, present; | |
2741 | gcc_assert (!f->sym->attr.allocatable); | |
5ef85f44 | 2742 | gfc_set_sym_referenced (f->sym); |
1e853e89 | 2743 | tmpe = gfc_lval_expr_from_sym (f->sym); |
2744 | tmp = gfc_trans_assignment (tmpe, f->sym->value, false); | |
2745 | ||
2746 | present = gfc_conv_expr_present (f->sym); | |
2747 | tmp = build3 (COND_EXPR, TREE_TYPE (tmp), present, | |
2748 | tmp, build_empty_stmt ()); | |
2749 | gfc_add_expr_to_block (&body, tmp); | |
2750 | gfc_free_expr (tmpe); | |
2751 | } | |
2752 | } | |
d4163395 | 2753 | |
2754 | if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER | |
2755 | && current_fake_result_decl != NULL) | |
2756 | { | |
2757 | gcc_assert (proc_sym->ts.cl->backend_decl != NULL); | |
2758 | if (TREE_CODE (proc_sym->ts.cl->backend_decl) == PARM_DECL) | |
2759 | gfc_trans_vla_type_sizes (proc_sym, &body); | |
2760 | } | |
2761 | ||
2762 | gfc_add_expr_to_block (&body, fnbody); | |
2763 | return gfc_finish_block (&body); | |
4ee9c684 | 2764 | } |
2765 | ||
2766 | ||
2767 | /* Output an initialized decl for a module variable. */ | |
2768 | ||
2769 | static void | |
2770 | gfc_create_module_variable (gfc_symbol * sym) | |
2771 | { | |
2772 | tree decl; | |
4ee9c684 | 2773 | |
d77f260f | 2774 | /* Module functions with alternate entries are dealt with later and |
2775 | would get caught by the next condition. */ | |
2776 | if (sym->attr.entry) | |
2777 | return; | |
2778 | ||
c5d33754 | 2779 | /* Make sure we convert the types of the derived types from iso_c_binding |
2780 | into (void *). */ | |
2781 | if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c | |
2782 | && sym->ts.type == BT_DERIVED) | |
2783 | sym->backend_decl = gfc_typenode_for_spec (&(sym->ts)); | |
2784 | ||
7b3423b9 | 2785 | /* Only output variables and array valued parameters. */ |
4ee9c684 | 2786 | if (sym->attr.flavor != FL_VARIABLE |
2787 | && (sym->attr.flavor != FL_PARAMETER || sym->attr.dimension == 0)) | |
2788 | return; | |
2789 | ||
d43a7f7f | 2790 | /* Don't generate variables from other modules. Variables from |
2791 | COMMONs will already have been generated. */ | |
2792 | if (sym->attr.use_assoc || sym->attr.in_common) | |
4ee9c684 | 2793 | return; |
2794 | ||
2b685f8e | 2795 | /* Equivalenced variables arrive here after creation. */ |
976d903a | 2796 | if (sym->backend_decl |
2797 | && (sym->equiv_built || sym->attr.in_equivalence)) | |
2b685f8e | 2798 | return; |
2799 | ||
4ee9c684 | 2800 | if (sym->backend_decl) |
2801 | internal_error ("backend decl for module variable %s already exists", | |
2802 | sym->name); | |
2803 | ||
2804 | /* We always want module variables to be created. */ | |
2805 | sym->attr.referenced = 1; | |
2806 | /* Create the decl. */ | |
2807 | decl = gfc_get_symbol_decl (sym); | |
2808 | ||
4ee9c684 | 2809 | /* Create the variable. */ |
2810 | pushdecl (decl); | |
b2c4af5e | 2811 | rest_of_decl_compilation (decl, 1, 0); |
4ee9c684 | 2812 | |
2813 | /* Also add length of strings. */ | |
2814 | if (sym->ts.type == BT_CHARACTER) | |
2815 | { | |
2816 | tree length; | |
2817 | ||
2818 | length = sym->ts.cl->backend_decl; | |
2819 | if (!INTEGER_CST_P (length)) | |
2820 | { | |
2821 | pushdecl (length); | |
b2c4af5e | 2822 | rest_of_decl_compilation (length, 1, 0); |
4ee9c684 | 2823 | } |
2824 | } | |
2825 | } | |
2826 | ||
2827 | ||
2828 | /* Generate all the required code for module variables. */ | |
2829 | ||
2830 | void | |
2831 | gfc_generate_module_vars (gfc_namespace * ns) | |
2832 | { | |
2833 | module_namespace = ns; | |
2834 | ||
dfc222eb | 2835 | /* Check if the frontend left the namespace in a reasonable state. */ |
22d678e8 | 2836 | gcc_assert (ns->proc_name && !ns->proc_name->tlink); |
4ee9c684 | 2837 | |
d43a7f7f | 2838 | /* Generate COMMON blocks. */ |
2839 | gfc_trans_common (ns); | |
2840 | ||
dfc222eb | 2841 | /* Create decls for all the module variables. */ |
4ee9c684 | 2842 | gfc_traverse_ns (ns, gfc_create_module_variable); |
2843 | } | |
2844 | ||
2845 | static void | |
2846 | gfc_generate_contained_functions (gfc_namespace * parent) | |
2847 | { | |
2848 | gfc_namespace *ns; | |
2849 | ||
2850 | /* We create all the prototypes before generating any code. */ | |
2851 | for (ns = parent->contained; ns; ns = ns->sibling) | |
2852 | { | |
2853 | /* Skip namespaces from used modules. */ | |
2854 | if (ns->parent != parent) | |
2855 | continue; | |
2856 | ||
1b716045 | 2857 | gfc_create_function_decl (ns); |
4ee9c684 | 2858 | } |
2859 | ||
2860 | for (ns = parent->contained; ns; ns = ns->sibling) | |
2861 | { | |
2862 | /* Skip namespaces from used modules. */ | |
2863 | if (ns->parent != parent) | |
2864 | continue; | |
2865 | ||
2866 | gfc_generate_function_code (ns); | |
2867 | } | |
2868 | } | |
2869 | ||
2870 | ||
d95efb59 | 2871 | /* Drill down through expressions for the array specification bounds and |
2872 | character length calling generate_local_decl for all those variables | |
2873 | that have not already been declared. */ | |
2874 | ||
2875 | static void | |
2876 | generate_local_decl (gfc_symbol *); | |
2877 | ||
2878 | static void | |
2879 | generate_expr_decls (gfc_symbol *sym, gfc_expr *e) | |
2880 | { | |
2881 | gfc_actual_arglist *arg; | |
2882 | gfc_ref *ref; | |
2883 | int i; | |
2884 | ||
2885 | if (e == NULL) | |
2886 | return; | |
2887 | ||
2888 | switch (e->expr_type) | |
2889 | { | |
2890 | case EXPR_FUNCTION: | |
2891 | for (arg = e->value.function.actual; arg; arg = arg->next) | |
2892 | generate_expr_decls (sym, arg->expr); | |
2893 | break; | |
2894 | ||
2895 | /* If the variable is not the same as the dependent, 'sym', and | |
2896 | it is not marked as being declared and it is in the same | |
2897 | namespace as 'sym', add it to the local declarations. */ | |
2898 | case EXPR_VARIABLE: | |
2899 | if (sym == e->symtree->n.sym | |
2900 | || e->symtree->n.sym->mark | |
2901 | || e->symtree->n.sym->ns != sym->ns) | |
2902 | return; | |
2903 | ||
2904 | generate_local_decl (e->symtree->n.sym); | |
2905 | break; | |
2906 | ||
2907 | case EXPR_OP: | |
2908 | generate_expr_decls (sym, e->value.op.op1); | |
2909 | generate_expr_decls (sym, e->value.op.op2); | |
2910 | break; | |
2911 | ||
2912 | default: | |
2913 | break; | |
2914 | } | |
2915 | ||
2916 | if (e->ref) | |
2917 | { | |
2918 | for (ref = e->ref; ref; ref = ref->next) | |
2919 | { | |
2920 | switch (ref->type) | |
2921 | { | |
2922 | case REF_ARRAY: | |
2923 | for (i = 0; i < ref->u.ar.dimen; i++) | |
2924 | { | |
2925 | generate_expr_decls (sym, ref->u.ar.start[i]); | |
2926 | generate_expr_decls (sym, ref->u.ar.end[i]); | |
2927 | generate_expr_decls (sym, ref->u.ar.stride[i]); | |
2928 | } | |
2929 | break; | |
2930 | ||
2931 | case REF_SUBSTRING: | |
2932 | generate_expr_decls (sym, ref->u.ss.start); | |
2933 | generate_expr_decls (sym, ref->u.ss.end); | |
2934 | break; | |
2935 | ||
2936 | case REF_COMPONENT: | |
2937 | if (ref->u.c.component->ts.type == BT_CHARACTER | |
2938 | && ref->u.c.component->ts.cl->length->expr_type | |
2939 | != EXPR_CONSTANT) | |
2940 | generate_expr_decls (sym, ref->u.c.component->ts.cl->length); | |
2941 | ||
2942 | if (ref->u.c.component->as) | |
2943 | for (i = 0; i < ref->u.c.component->as->rank; i++) | |
2944 | { | |
2945 | generate_expr_decls (sym, ref->u.c.component->as->lower[i]); | |
2946 | generate_expr_decls (sym, ref->u.c.component->as->upper[i]); | |
2947 | } | |
2948 | break; | |
2949 | } | |
2950 | } | |
2951 | } | |
2952 | } | |
2953 | ||
2954 | ||
f6d0e37a | 2955 | /* Check for dependencies in the character length and array spec. */ |
d95efb59 | 2956 | |
2957 | static void | |
2958 | generate_dependency_declarations (gfc_symbol *sym) | |
2959 | { | |
2960 | int i; | |
2961 | ||
2962 | if (sym->ts.type == BT_CHARACTER | |
2963 | && sym->ts.cl->length->expr_type != EXPR_CONSTANT) | |
2964 | generate_expr_decls (sym, sym->ts.cl->length); | |
2965 | ||
2966 | if (sym->as && sym->as->rank) | |
2967 | { | |
2968 | for (i = 0; i < sym->as->rank; i++) | |
2969 | { | |
2970 | generate_expr_decls (sym, sym->as->lower[i]); | |
2971 | generate_expr_decls (sym, sym->as->upper[i]); | |
2972 | } | |
2973 | } | |
2974 | } | |
2975 | ||
2976 | ||
4ee9c684 | 2977 | /* Generate decls for all local variables. We do this to ensure correct |
2978 | handling of expressions which only appear in the specification of | |
2979 | other functions. */ | |
2980 | ||
2981 | static void | |
2982 | generate_local_decl (gfc_symbol * sym) | |
2983 | { | |
2984 | if (sym->attr.flavor == FL_VARIABLE) | |
2985 | { | |
d95efb59 | 2986 | /* Check for dependencies in the array specification and string |
2987 | length, adding the necessary declarations to the function. We | |
2988 | mark the symbol now, as well as in traverse_ns, to prevent | |
2989 | getting stuck in a circular dependency. */ | |
2990 | sym->mark = 1; | |
2991 | if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master) | |
2992 | generate_dependency_declarations (sym); | |
2993 | ||
4ee9c684 | 2994 | if (sym->attr.referenced) |
2995 | gfc_get_symbol_decl (sym); | |
76776e6d | 2996 | /* INTENT(out) dummy arguments are likely meant to be set. */ |
2997 | else if (warn_unused_variable | |
2998 | && sym->attr.dummy | |
2999 | && sym->attr.intent == INTENT_OUT) | |
6ecfe89d | 3000 | gfc_warning ("Dummy argument '%s' at %L was declared INTENT(OUT) but was not set", |
76776e6d | 3001 | sym->name, &sym->declared_at); |
3002 | /* Specific warning for unused dummy arguments. */ | |
3003 | else if (warn_unused_variable && sym->attr.dummy) | |
6ecfe89d | 3004 | gfc_warning ("Unused dummy argument '%s' at %L", sym->name, |
d974cfde | 3005 | &sym->declared_at); |
f888a3fb | 3006 | /* Warn for unused variables, but not if they're inside a common |
14a3addc | 3007 | block or are use-associated. */ |
36609028 | 3008 | else if (warn_unused_variable |
3009 | && !(sym->attr.in_common || sym->attr.use_assoc)) | |
6ecfe89d | 3010 | gfc_warning ("Unused variable '%s' declared at %L", sym->name, |
d974cfde | 3011 | &sym->declared_at); |
d4163395 | 3012 | /* For variable length CHARACTER parameters, the PARM_DECL already |
3013 | references the length variable, so force gfc_get_symbol_decl | |
3014 | even when not referenced. If optimize > 0, it will be optimized | |
3015 | away anyway. But do this only after emitting -Wunused-parameter | |
3016 | warning if requested. */ | |
3017 | if (sym->attr.dummy && ! sym->attr.referenced | |
3018 | && sym->ts.type == BT_CHARACTER | |
3019 | && sym->ts.cl->backend_decl != NULL | |
3020 | && TREE_CODE (sym->ts.cl->backend_decl) == VAR_DECL) | |
3021 | { | |
3022 | sym->attr.referenced = 1; | |
3023 | gfc_get_symbol_decl (sym); | |
3024 | } | |
76776e6d | 3025 | |
3026 | /* We do not want the middle-end to warn about unused parameters | |
3027 | as this was already done above. */ | |
3028 | if (sym->attr.dummy && sym->backend_decl != NULL_TREE) | |
3029 | TREE_NO_WARNING(sym->backend_decl) = 1; | |
4ee9c684 | 3030 | } |
5dd246c1 | 3031 | else if (sym->attr.flavor == FL_PARAMETER) |
3032 | { | |
6ecfe89d | 3033 | if (warn_unused_parameter |
5dd246c1 | 3034 | && !sym->attr.referenced |
3035 | && !sym->attr.use_assoc) | |
6ecfe89d | 3036 | gfc_warning ("Unused parameter '%s' declared at %L", sym->name, |
5dd246c1 | 3037 | &sym->declared_at); |
3038 | } | |
c5d33754 | 3039 | |
19ba2ad8 | 3040 | if (sym->attr.dummy == 1) |
3041 | { | |
3042 | /* Modify the tree type for scalar character dummy arguments of bind(c) | |
3043 | procedures if they are passed by value. The tree type for them will | |
3044 | be promoted to INTEGER_TYPE for the middle end, which appears to be | |
3045 | what C would do with characters passed by-value. The value attribute | |
3046 | implies the dummy is a scalar. */ | |
3047 | if (sym->attr.value == 1 && sym->backend_decl != NULL | |
3048 | && sym->ts.type == BT_CHARACTER && sym->ts.is_c_interop | |
3049 | && sym->ns->proc_name != NULL && sym->ns->proc_name->attr.is_bind_c) | |
3050 | TREE_TYPE (sym->backend_decl) = unsigned_char_type_node; | |
3051 | } | |
3052 | ||
c5d33754 | 3053 | /* Make sure we convert the types of the derived types from iso_c_binding |
3054 | into (void *). */ | |
3055 | if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c | |
3056 | && sym->ts.type == BT_DERIVED) | |
3057 | sym->backend_decl = gfc_typenode_for_spec (&(sym->ts)); | |
4ee9c684 | 3058 | } |
3059 | ||
3060 | static void | |
3061 | generate_local_vars (gfc_namespace * ns) | |
3062 | { | |
3063 | gfc_traverse_ns (ns, generate_local_decl); | |
3064 | } | |
3065 | ||
3066 | ||
1b716045 | 3067 | /* Generate a switch statement to jump to the correct entry point. Also |
3068 | creates the label decls for the entry points. */ | |
4ee9c684 | 3069 | |
1b716045 | 3070 | static tree |
3071 | gfc_trans_entry_master_switch (gfc_entry_list * el) | |
4ee9c684 | 3072 | { |
1b716045 | 3073 | stmtblock_t block; |
3074 | tree label; | |
3075 | tree tmp; | |
3076 | tree val; | |
4ee9c684 | 3077 | |
1b716045 | 3078 | gfc_init_block (&block); |
3079 | for (; el; el = el->next) | |
3080 | { | |
3081 | /* Add the case label. */ | |
b797d6d3 | 3082 | label = gfc_build_label_decl (NULL_TREE); |
7016c612 | 3083 | val = build_int_cst (gfc_array_index_type, el->id); |
ed52ef8b | 3084 | tmp = build3_v (CASE_LABEL_EXPR, val, NULL_TREE, label); |
1b716045 | 3085 | gfc_add_expr_to_block (&block, tmp); |
3086 | ||
3087 | /* And jump to the actual entry point. */ | |
3088 | label = gfc_build_label_decl (NULL_TREE); | |
1b716045 | 3089 | tmp = build1_v (GOTO_EXPR, label); |
3090 | gfc_add_expr_to_block (&block, tmp); | |
3091 | ||
3092 | /* Save the label decl. */ | |
3093 | el->label = label; | |
3094 | } | |
3095 | tmp = gfc_finish_block (&block); | |
3096 | /* The first argument selects the entry point. */ | |
3097 | val = DECL_ARGUMENTS (current_function_decl); | |
ed52ef8b | 3098 | tmp = build3_v (SWITCH_EXPR, val, tmp, NULL_TREE); |
1b716045 | 3099 | return tmp; |
4ee9c684 | 3100 | } |
3101 | ||
6374121b | 3102 | |
4ee9c684 | 3103 | /* Generate code for a function. */ |
3104 | ||
3105 | void | |
3106 | gfc_generate_function_code (gfc_namespace * ns) | |
3107 | { | |
3108 | tree fndecl; | |
3109 | tree old_context; | |
3110 | tree decl; | |
3111 | tree tmp; | |
2294b616 | 3112 | tree tmp2; |
4ee9c684 | 3113 | stmtblock_t block; |
3114 | stmtblock_t body; | |
3115 | tree result; | |
3116 | gfc_symbol *sym; | |
2294b616 | 3117 | int rank; |
4ee9c684 | 3118 | |
3119 | sym = ns->proc_name; | |
1b716045 | 3120 | |
4ee9c684 | 3121 | /* Check that the frontend isn't still using this. */ |
22d678e8 | 3122 | gcc_assert (sym->tlink == NULL); |
4ee9c684 | 3123 | sym->tlink = sym; |
3124 | ||
3125 | /* Create the declaration for functions with global scope. */ | |
3126 | if (!sym->backend_decl) | |
1b716045 | 3127 | gfc_create_function_decl (ns); |
4ee9c684 | 3128 | |
3129 | fndecl = sym->backend_decl; | |
3130 | old_context = current_function_decl; | |
3131 | ||
3132 | if (old_context) | |
3133 | { | |
3134 | push_function_context (); | |
3135 | saved_parent_function_decls = saved_function_decls; | |
3136 | saved_function_decls = NULL_TREE; | |
3137 | } | |
3138 | ||
1b716045 | 3139 | trans_function_start (sym); |
4ee9c684 | 3140 | |
4ee9c684 | 3141 | gfc_start_block (&block); |
3142 | ||
c6871095 | 3143 | if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER) |
3144 | { | |
3145 | /* Copy length backend_decls to all entry point result | |
3146 | symbols. */ | |
3147 | gfc_entry_list *el; | |
3148 | tree backend_decl; | |
3149 | ||
3150 | gfc_conv_const_charlen (ns->proc_name->ts.cl); | |
3151 | backend_decl = ns->proc_name->result->ts.cl->backend_decl; | |
3152 | for (el = ns->entries; el; el = el->next) | |
3153 | el->sym->result->ts.cl->backend_decl = backend_decl; | |
3154 | } | |
3155 | ||
4ee9c684 | 3156 | /* Translate COMMON blocks. */ |
3157 | gfc_trans_common (ns); | |
3158 | ||
c750cc52 | 3159 | /* Null the parent fake result declaration if this namespace is |
3160 | a module function or an external procedures. */ | |
3161 | if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE) | |
3162 | || ns->parent == NULL) | |
3163 | parent_fake_result_decl = NULL_TREE; | |
3164 | ||
2b685f8e | 3165 | gfc_generate_contained_functions (ns); |
3166 | ||
4ee9c684 | 3167 | generate_local_vars (ns); |
669122e7 | 3168 | |
c750cc52 | 3169 | /* Keep the parent fake result declaration in module functions |
3170 | or external procedures. */ | |
3171 | if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE) | |
3172 | || ns->parent == NULL) | |
3173 | current_fake_result_decl = parent_fake_result_decl; | |
3174 | else | |
3175 | current_fake_result_decl = NULL_TREE; | |
3176 | ||
4ee9c684 | 3177 | current_function_return_label = NULL; |
3178 | ||
3179 | /* Now generate the code for the body of this function. */ | |
3180 | gfc_init_block (&body); | |
3181 | ||
56c7c2d7 | 3182 | /* If this is the main program, add a call to set_options to set up the |
7833ddd7 | 3183 | runtime library Fortran language standard parameters. */ |
7833ddd7 | 3184 | if (sym->attr.is_main_program) |
64fc3c4c | 3185 | { |
56c7c2d7 | 3186 | tree array_type, array, var; |
3187 | ||
3188 | /* Passing a new option to the library requires four modifications: | |
3189 | + add it to the tree_cons list below | |
3190 | + change the array size in the call to build_array_type | |
3191 | + change the first argument to the library call | |
3192 | gfor_fndecl_set_options | |
3193 | + modify the library (runtime/compile_options.c)! */ | |
3194 | array = tree_cons (NULL_TREE, | |
36c921b9 | 3195 | build_int_cst (integer_type_node, |
56c7c2d7 | 3196 | gfc_option.warn_std), NULL_TREE); |
3197 | array = tree_cons (NULL_TREE, | |
36c921b9 | 3198 | build_int_cst (integer_type_node, |
56c7c2d7 | 3199 | gfc_option.allow_std), array); |
3200 | array = tree_cons (NULL_TREE, | |
36c921b9 | 3201 | build_int_cst (integer_type_node, pedantic), array); |
56c7c2d7 | 3202 | array = tree_cons (NULL_TREE, |
36c921b9 | 3203 | build_int_cst (integer_type_node, |
56c7c2d7 | 3204 | gfc_option.flag_dump_core), array); |
3205 | array = tree_cons (NULL_TREE, | |
36c921b9 | 3206 | build_int_cst (integer_type_node, |
56c7c2d7 | 3207 | gfc_option.flag_backtrace), array); |
3208 | array = tree_cons (NULL_TREE, | |
36c921b9 | 3209 | build_int_cst (integer_type_node, |
56c7c2d7 | 3210 | gfc_option.flag_sign_zero), array); |
3211 | ||
c086aee1 | 3212 | array = tree_cons (NULL_TREE, |
36c921b9 | 3213 | build_int_cst (integer_type_node, |
c086aee1 | 3214 | flag_bounds_check), array); |
3215 | ||
36c921b9 | 3216 | array_type = build_array_type (integer_type_node, |
56c7c2d7 | 3217 | build_index_type (build_int_cst (NULL_TREE, |
c086aee1 | 3218 | 6))); |
56c7c2d7 | 3219 | array = build_constructor_from_list (array_type, nreverse (array)); |
3220 | TREE_CONSTANT (array) = 1; | |
3221 | TREE_INVARIANT (array) = 1; | |
3222 | TREE_STATIC (array) = 1; | |
3223 | ||
3224 | /* Create a static variable to hold the jump table. */ | |
3225 | var = gfc_create_var (array_type, "options"); | |
3226 | TREE_CONSTANT (var) = 1; | |
3227 | TREE_INVARIANT (var) = 1; | |
3228 | TREE_STATIC (var) = 1; | |
3229 | TREE_READONLY (var) = 1; | |
3230 | DECL_INITIAL (var) = array; | |
3231 | var = gfc_build_addr_expr (pvoid_type_node, var); | |
3232 | ||
3233 | tmp = build_call_expr (gfor_fndecl_set_options, 2, | |
36c921b9 | 3234 | build_int_cst (integer_type_node, 7), var); |
64fc3c4c | 3235 | gfc_add_expr_to_block (&body, tmp); |
3236 | } | |
3237 | ||
8c84a5de | 3238 | /* If this is the main program and a -ffpe-trap option was provided, |
3239 | add a call to set_fpe so that the library will raise a FPE when | |
3240 | needed. */ | |
3241 | if (sym->attr.is_main_program && gfc_option.fpe != 0) | |
3242 | { | |
c2f47e15 | 3243 | tmp = build_call_expr (gfor_fndecl_set_fpe, 1, |
36c921b9 | 3244 | build_int_cst (integer_type_node, |
c2f47e15 | 3245 | gfc_option.fpe)); |
8c84a5de | 3246 | gfc_add_expr_to_block (&body, tmp); |
3247 | } | |
3248 | ||
15774a8b | 3249 | /* If this is the main program and an -fconvert option was provided, |
3250 | add a call to set_convert. */ | |
3251 | ||
3252 | if (sym->attr.is_main_program && gfc_option.convert != CONVERT_NATIVE) | |
3253 | { | |
c2f47e15 | 3254 | tmp = build_call_expr (gfor_fndecl_set_convert, 1, |
36c921b9 | 3255 | build_int_cst (integer_type_node, |
c2f47e15 | 3256 | gfc_option.convert)); |
15774a8b | 3257 | gfc_add_expr_to_block (&body, tmp); |
3258 | } | |
3259 | ||
f23886ab | 3260 | /* If this is the main program and an -frecord-marker option was provided, |
3261 | add a call to set_record_marker. */ | |
3262 | ||
3263 | if (sym->attr.is_main_program && gfc_option.record_marker != 0) | |
3264 | { | |
c2f47e15 | 3265 | tmp = build_call_expr (gfor_fndecl_set_record_marker, 1, |
36c921b9 | 3266 | build_int_cst (integer_type_node, |
c2f47e15 | 3267 | gfc_option.record_marker)); |
f23886ab | 3268 | gfc_add_expr_to_block (&body, tmp); |
f23886ab | 3269 | } |
15774a8b | 3270 | |
bbaaa7b1 | 3271 | if (sym->attr.is_main_program && gfc_option.max_subrecord_length != 0) |
3272 | { | |
c2f47e15 | 3273 | tmp = build_call_expr (gfor_fndecl_set_max_subrecord_length, |
3274 | 1, | |
36c921b9 | 3275 | build_int_cst (integer_type_node, |
c2f47e15 | 3276 | gfc_option.max_subrecord_length)); |
bbaaa7b1 | 3277 | gfc_add_expr_to_block (&body, tmp); |
3278 | } | |
3279 | ||
4ee9c684 | 3280 | if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node |
3281 | && sym->attr.subroutine) | |
3282 | { | |
3283 | tree alternate_return; | |
c750cc52 | 3284 | alternate_return = gfc_get_fake_result_decl (sym, 0); |
4ee9c684 | 3285 | gfc_add_modify_expr (&body, alternate_return, integer_zero_node); |
3286 | } | |
3287 | ||
1b716045 | 3288 | if (ns->entries) |
3289 | { | |
3290 | /* Jump to the correct entry point. */ | |
3291 | tmp = gfc_trans_entry_master_switch (ns->entries); | |
3292 | gfc_add_expr_to_block (&body, tmp); | |
3293 | } | |
3294 | ||
4ee9c684 | 3295 | tmp = gfc_trans_code (ns->code); |
3296 | gfc_add_expr_to_block (&body, tmp); | |
3297 | ||
3298 | /* Add a return label if needed. */ | |
3299 | if (current_function_return_label) | |
3300 | { | |
3301 | tmp = build1_v (LABEL_EXPR, current_function_return_label); | |
3302 | gfc_add_expr_to_block (&body, tmp); | |
3303 | } | |
3304 | ||
3305 | tmp = gfc_finish_block (&body); | |
3306 | /* Add code to create and cleanup arrays. */ | |
3307 | tmp = gfc_trans_deferred_vars (sym, tmp); | |
4ee9c684 | 3308 | |
3309 | if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node) | |
3310 | { | |
14a3addc | 3311 | if (sym->attr.subroutine || sym == sym->result) |
4ee9c684 | 3312 | { |
d4163395 | 3313 | if (current_fake_result_decl != NULL) |
3314 | result = TREE_VALUE (current_fake_result_decl); | |
3315 | else | |
3316 | result = NULL_TREE; | |
4ee9c684 | 3317 | current_fake_result_decl = NULL_TREE; |
3318 | } | |
3319 | else | |
3320 | result = sym->result->backend_decl; | |
3321 | ||
2294b616 | 3322 | if (result != NULL_TREE && sym->attr.function |
3323 | && sym->ts.type == BT_DERIVED | |
091bff86 | 3324 | && sym->ts.derived->attr.alloc_comp |
3325 | && !sym->attr.pointer) | |
2294b616 | 3326 | { |
3327 | rank = sym->as ? sym->as->rank : 0; | |
3328 | tmp2 = gfc_nullify_alloc_comp (sym->ts.derived, result, rank); | |
3329 | gfc_add_expr_to_block (&block, tmp2); | |
3330 | } | |
3331 | ||
3332 | gfc_add_expr_to_block (&block, tmp); | |
3333 | ||
3334 | if (result == NULL_TREE) | |
c3ceba8e | 3335 | warning (0, "Function return value not set"); |
4ee9c684 | 3336 | else |
3337 | { | |
3350e716 | 3338 | /* Set the return value to the dummy result variable. The |
3339 | types may be different for scalar default REAL functions | |
3340 | with -ff2c, therefore we have to convert. */ | |
3341 | tmp = convert (TREE_TYPE (DECL_RESULT (fndecl)), result); | |
3342 | tmp = build2 (MODIFY_EXPR, TREE_TYPE (tmp), | |
3343 | DECL_RESULT (fndecl), tmp); | |
ed52ef8b | 3344 | tmp = build1_v (RETURN_EXPR, tmp); |
4ee9c684 | 3345 | gfc_add_expr_to_block (&block, tmp); |
3346 | } | |
3347 | } | |
2294b616 | 3348 | else |
3349 | gfc_add_expr_to_block (&block, tmp); | |
3350 | ||
4ee9c684 | 3351 | |
3352 | /* Add all the decls we created during processing. */ | |
3353 | decl = saved_function_decls; | |
3354 | while (decl) | |
3355 | { | |
3356 | tree next; | |
3357 | ||
3358 | next = TREE_CHAIN (decl); | |
3359 | TREE_CHAIN (decl) = NULL_TREE; | |
3360 | pushdecl (decl); | |
3361 | decl = next; | |
3362 | } | |
3363 | saved_function_decls = NULL_TREE; | |
3364 | ||
3365 | DECL_SAVED_TREE (fndecl) = gfc_finish_block (&block); | |
3366 | ||
3367 | /* Finish off this function and send it for code generation. */ | |
3368 | poplevel (1, 0, 1); | |
3369 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; | |
3370 | ||
3371 | /* Output the GENERIC tree. */ | |
3372 | dump_function (TDI_original, fndecl); | |
3373 | ||
3374 | /* Store the end of the function, so that we get good line number | |
3375 | info for the epilogue. */ | |
3376 | cfun->function_end_locus = input_location; | |
3377 | ||
3378 | /* We're leaving the context of this function, so zap cfun. | |
3379 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in | |
3380 | tree_rest_of_compilation. */ | |
3381 | cfun = NULL; | |
3382 | ||
3383 | if (old_context) | |
3384 | { | |
3385 | pop_function_context (); | |
3386 | saved_function_decls = saved_parent_function_decls; | |
3387 | } | |
3388 | current_function_decl = old_context; | |
3389 | ||
3390 | if (decl_function_context (fndecl)) | |
6374121b | 3391 | /* Register this function with cgraph just far enough to get it |
3392 | added to our parent's nested function list. */ | |
3393 | (void) cgraph_node (fndecl); | |
4ee9c684 | 3394 | else |
3395 | { | |
6374121b | 3396 | gfc_gimplify_function (fndecl); |
9d95b2b0 | 3397 | cgraph_finalize_function (fndecl, false); |
4ee9c684 | 3398 | } |
3399 | } | |
3400 | ||
4ee9c684 | 3401 | void |
3402 | gfc_generate_constructors (void) | |
3403 | { | |
22d678e8 | 3404 | gcc_assert (gfc_static_ctors == NULL_TREE); |
4ee9c684 | 3405 | #if 0 |
3406 | tree fnname; | |
3407 | tree type; | |
3408 | tree fndecl; | |
3409 | tree decl; | |
3410 | tree tmp; | |
3411 | ||
3412 | if (gfc_static_ctors == NULL_TREE) | |
3413 | return; | |
3414 | ||
db85cc4f | 3415 | fnname = get_file_function_name ("I"); |
4ee9c684 | 3416 | type = build_function_type (void_type_node, |
3417 | gfc_chainon_list (NULL_TREE, void_type_node)); | |
3418 | ||
3419 | fndecl = build_decl (FUNCTION_DECL, fnname, type); | |
3420 | TREE_PUBLIC (fndecl) = 1; | |
3421 | ||
3422 | decl = build_decl (RESULT_DECL, NULL_TREE, void_type_node); | |
540edea7 | 3423 | DECL_ARTIFICIAL (decl) = 1; |
3424 | DECL_IGNORED_P (decl) = 1; | |
4ee9c684 | 3425 | DECL_CONTEXT (decl) = fndecl; |
3426 | DECL_RESULT (fndecl) = decl; | |
3427 | ||
3428 | pushdecl (fndecl); | |
3429 | ||
3430 | current_function_decl = fndecl; | |
3431 | ||
b2c4af5e | 3432 | rest_of_decl_compilation (fndecl, 1, 0); |
4ee9c684 | 3433 | |
b2c4af5e | 3434 | make_decl_rtl (fndecl); |
4ee9c684 | 3435 | |
b31f705b | 3436 | init_function_start (fndecl); |
4ee9c684 | 3437 | |
4ee9c684 | 3438 | pushlevel (0); |
3439 | ||
3440 | for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors)) | |
3441 | { | |
c2f47e15 | 3442 | tmp = build_call_expr (TREE_VALUE (gfc_static_ctors), 0); |
4ee9c684 | 3443 | DECL_SAVED_TREE (fndecl) = build_stmt (EXPR_STMT, tmp); |
3444 | } | |
3445 | ||
3446 | poplevel (1, 0, 1); | |
3447 | ||
3448 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; | |
3449 | ||
3450 | free_after_parsing (cfun); | |
3451 | free_after_compilation (cfun); | |
3452 | ||
6148a911 | 3453 | tree_rest_of_compilation (fndecl); |
4ee9c684 | 3454 | |
3455 | current_function_decl = NULL_TREE; | |
3456 | #endif | |
3457 | } | |
3458 | ||
9ec7c303 | 3459 | /* Translates a BLOCK DATA program unit. This means emitting the |
3460 | commons contained therein plus their initializations. We also emit | |
3461 | a globally visible symbol to make sure that each BLOCK DATA program | |
3462 | unit remains unique. */ | |
3463 | ||
3464 | void | |
3465 | gfc_generate_block_data (gfc_namespace * ns) | |
3466 | { | |
3467 | tree decl; | |
3468 | tree id; | |
3469 | ||
b31f705b | 3470 | /* Tell the backend the source location of the block data. */ |
3471 | if (ns->proc_name) | |
3472 | gfc_set_backend_locus (&ns->proc_name->declared_at); | |
3473 | else | |
3474 | gfc_set_backend_locus (&gfc_current_locus); | |
3475 | ||
3476 | /* Process the DATA statements. */ | |
9ec7c303 | 3477 | gfc_trans_common (ns); |
3478 | ||
b31f705b | 3479 | /* Create a global symbol with the mane of the block data. This is to |
3480 | generate linker errors if the same name is used twice. It is never | |
3481 | really used. */ | |
9ec7c303 | 3482 | if (ns->proc_name) |
3483 | id = gfc_sym_mangled_function_id (ns->proc_name); | |
3484 | else | |
3485 | id = get_identifier ("__BLOCK_DATA__"); | |
3486 | ||
3487 | decl = build_decl (VAR_DECL, id, gfc_array_index_type); | |
3488 | TREE_PUBLIC (decl) = 1; | |
3489 | TREE_STATIC (decl) = 1; | |
3490 | ||
3491 | pushdecl (decl); | |
3492 | rest_of_decl_compilation (decl, 1, 0); | |
3493 | } | |
3494 | ||
b549d2a5 | 3495 | |
4ee9c684 | 3496 | #include "gt-fortran-trans-decl.h" |