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4ee9c684 | 1 | /* Expression translation |
c820a7e7 | 2 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software |
3 | Foundation, Inc. | |
4ee9c684 | 4 | Contributed by Paul Brook <paul@nowt.org> |
5 | and Steven Bosscher <s.bosscher@student.tudelft.nl> | |
6 | ||
c84b470d | 7 | This file is part of GCC. |
4ee9c684 | 8 | |
c84b470d | 9 | GCC is free software; you can redistribute it and/or modify it under |
10 | the terms of the GNU General Public License as published by the Free | |
11 | Software Foundation; either version 2, or (at your option) any later | |
12 | version. | |
4ee9c684 | 13 | |
c84b470d | 14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
4ee9c684 | 18 | |
19 | You should have received a copy of the GNU General Public License | |
c84b470d | 20 | along with GCC; see the file COPYING. If not, write to the Free |
30d4ffea | 21 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
22 | 02110-1301, USA. */ | |
4ee9c684 | 23 | |
24 | /* trans-expr.c-- generate GENERIC trees for gfc_expr. */ | |
25 | ||
26 | #include "config.h" | |
27 | #include "system.h" | |
28 | #include "coretypes.h" | |
29 | #include "tree.h" | |
30 | #include "convert.h" | |
4ee9c684 | 31 | #include "ggc.h" |
32 | #include "toplev.h" | |
33 | #include "real.h" | |
88bce636 | 34 | #include "tree-gimple.h" |
59b9dcbd | 35 | #include "langhooks.h" |
4ee9c684 | 36 | #include "flags.h" |
4ee9c684 | 37 | #include "gfortran.h" |
38 | #include "trans.h" | |
39 | #include "trans-const.h" | |
40 | #include "trans-types.h" | |
41 | #include "trans-array.h" | |
42 | /* Only for gfc_trans_assign and gfc_trans_pointer_assign. */ | |
43 | #include "trans-stmt.h" | |
c99d633f | 44 | #include "dependency.h" |
4ee9c684 | 45 | |
9a0aec1d | 46 | static tree gfc_trans_structure_assign (tree dest, gfc_expr * expr); |
7f7ca309 | 47 | static int gfc_apply_interface_mapping_to_expr (gfc_interface_mapping *, |
f45a476e | 48 | gfc_expr *); |
4ee9c684 | 49 | |
50 | /* Copy the scalarization loop variables. */ | |
51 | ||
52 | static void | |
53 | gfc_copy_se_loopvars (gfc_se * dest, gfc_se * src) | |
54 | { | |
55 | dest->ss = src->ss; | |
56 | dest->loop = src->loop; | |
57 | } | |
58 | ||
59 | ||
f888a3fb | 60 | /* Initialize a simple expression holder. |
4ee9c684 | 61 | |
62 | Care must be taken when multiple se are created with the same parent. | |
63 | The child se must be kept in sync. The easiest way is to delay creation | |
64 | of a child se until after after the previous se has been translated. */ | |
65 | ||
66 | void | |
67 | gfc_init_se (gfc_se * se, gfc_se * parent) | |
68 | { | |
69 | memset (se, 0, sizeof (gfc_se)); | |
70 | gfc_init_block (&se->pre); | |
71 | gfc_init_block (&se->post); | |
72 | ||
73 | se->parent = parent; | |
74 | ||
75 | if (parent) | |
76 | gfc_copy_se_loopvars (se, parent); | |
77 | } | |
78 | ||
79 | ||
80 | /* Advances to the next SS in the chain. Use this rather than setting | |
f888a3fb | 81 | se->ss = se->ss->next because all the parents needs to be kept in sync. |
4ee9c684 | 82 | See gfc_init_se. */ |
83 | ||
84 | void | |
85 | gfc_advance_se_ss_chain (gfc_se * se) | |
86 | { | |
87 | gfc_se *p; | |
88 | ||
22d678e8 | 89 | gcc_assert (se != NULL && se->ss != NULL && se->ss != gfc_ss_terminator); |
4ee9c684 | 90 | |
91 | p = se; | |
92 | /* Walk down the parent chain. */ | |
93 | while (p != NULL) | |
94 | { | |
f888a3fb | 95 | /* Simple consistency check. */ |
22d678e8 | 96 | gcc_assert (p->parent == NULL || p->parent->ss == p->ss); |
4ee9c684 | 97 | |
98 | p->ss = p->ss->next; | |
99 | ||
100 | p = p->parent; | |
101 | } | |
102 | } | |
103 | ||
104 | ||
105 | /* Ensures the result of the expression as either a temporary variable | |
106 | or a constant so that it can be used repeatedly. */ | |
107 | ||
108 | void | |
109 | gfc_make_safe_expr (gfc_se * se) | |
110 | { | |
111 | tree var; | |
112 | ||
ce45a448 | 113 | if (CONSTANT_CLASS_P (se->expr)) |
4ee9c684 | 114 | return; |
115 | ||
f888a3fb | 116 | /* We need a temporary for this result. */ |
4ee9c684 | 117 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); |
118 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
119 | se->expr = var; | |
120 | } | |
121 | ||
122 | ||
5cb9d0d8 | 123 | /* Return an expression which determines if a dummy parameter is present. |
124 | Also used for arguments to procedures with multiple entry points. */ | |
4ee9c684 | 125 | |
126 | tree | |
127 | gfc_conv_expr_present (gfc_symbol * sym) | |
128 | { | |
129 | tree decl; | |
130 | ||
5cb9d0d8 | 131 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 132 | |
133 | decl = gfc_get_symbol_decl (sym); | |
134 | if (TREE_CODE (decl) != PARM_DECL) | |
135 | { | |
136 | /* Array parameters use a temporary descriptor, we want the real | |
137 | parameter. */ | |
22d678e8 | 138 | gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (decl)) |
4ee9c684 | 139 | || GFC_ARRAY_TYPE_P (TREE_TYPE (decl))); |
140 | decl = GFC_DECL_SAVED_DESCRIPTOR (decl); | |
141 | } | |
ed52ef8b | 142 | return build2 (NE_EXPR, boolean_type_node, decl, |
143 | fold_convert (TREE_TYPE (decl), null_pointer_node)); | |
4ee9c684 | 144 | } |
145 | ||
146 | ||
bd24f178 | 147 | /* Converts a missing, dummy argument into a null or zero. */ |
148 | ||
149 | void | |
150 | gfc_conv_missing_dummy (gfc_se * se, gfc_expr * arg, gfc_typespec ts) | |
151 | { | |
152 | tree present; | |
153 | tree tmp; | |
154 | ||
155 | present = gfc_conv_expr_present (arg->symtree->n.sym); | |
156 | tmp = build3 (COND_EXPR, TREE_TYPE (se->expr), present, se->expr, | |
531619d3 | 157 | fold_convert (TREE_TYPE (se->expr), integer_zero_node)); |
158 | ||
bd24f178 | 159 | tmp = gfc_evaluate_now (tmp, &se->pre); |
160 | se->expr = tmp; | |
161 | if (ts.type == BT_CHARACTER) | |
162 | { | |
7d3075f6 | 163 | tmp = build_int_cst (gfc_charlen_type_node, 0); |
bd24f178 | 164 | tmp = build3 (COND_EXPR, gfc_charlen_type_node, present, |
165 | se->string_length, tmp); | |
166 | tmp = gfc_evaluate_now (tmp, &se->pre); | |
167 | se->string_length = tmp; | |
168 | } | |
169 | return; | |
170 | } | |
171 | ||
172 | ||
6bf678b8 | 173 | /* Get the character length of an expression, looking through gfc_refs |
174 | if necessary. */ | |
175 | ||
176 | tree | |
177 | gfc_get_expr_charlen (gfc_expr *e) | |
178 | { | |
179 | gfc_ref *r; | |
180 | tree length; | |
181 | ||
182 | gcc_assert (e->expr_type == EXPR_VARIABLE | |
183 | && e->ts.type == BT_CHARACTER); | |
184 | ||
185 | length = NULL; /* To silence compiler warning. */ | |
186 | ||
187 | /* First candidate: if the variable is of type CHARACTER, the | |
188 | expression's length could be the length of the character | |
b14e2757 | 189 | variable. */ |
6bf678b8 | 190 | if (e->symtree->n.sym->ts.type == BT_CHARACTER) |
191 | length = e->symtree->n.sym->ts.cl->backend_decl; | |
192 | ||
193 | /* Look through the reference chain for component references. */ | |
194 | for (r = e->ref; r; r = r->next) | |
195 | { | |
196 | switch (r->type) | |
197 | { | |
198 | case REF_COMPONENT: | |
199 | if (r->u.c.component->ts.type == BT_CHARACTER) | |
200 | length = r->u.c.component->ts.cl->backend_decl; | |
201 | break; | |
202 | ||
203 | case REF_ARRAY: | |
204 | /* Do nothing. */ | |
205 | break; | |
206 | ||
207 | default: | |
208 | /* We should never got substring references here. These will be | |
209 | broken down by the scalarizer. */ | |
210 | gcc_unreachable (); | |
211 | } | |
212 | } | |
213 | ||
214 | gcc_assert (length != NULL); | |
215 | return length; | |
216 | } | |
217 | ||
218 | ||
219 | ||
4ee9c684 | 220 | /* Generate code to initialize a string length variable. Returns the |
221 | value. */ | |
222 | ||
223 | void | |
224 | gfc_trans_init_string_length (gfc_charlen * cl, stmtblock_t * pblock) | |
225 | { | |
226 | gfc_se se; | |
227 | tree tmp; | |
228 | ||
229 | gfc_init_se (&se, NULL); | |
9ad09405 | 230 | gfc_conv_expr_type (&se, cl->length, gfc_charlen_type_node); |
a0ab480a | 231 | se.expr = fold_build2 (MAX_EXPR, gfc_charlen_type_node, se.expr, |
232 | build_int_cst (gfc_charlen_type_node, 0)); | |
4ee9c684 | 233 | gfc_add_block_to_block (pblock, &se.pre); |
234 | ||
235 | tmp = cl->backend_decl; | |
236 | gfc_add_modify_expr (pblock, tmp, se.expr); | |
237 | } | |
238 | ||
f888a3fb | 239 | |
4ee9c684 | 240 | static void |
ee3729de | 241 | gfc_conv_substring (gfc_se * se, gfc_ref * ref, int kind, |
242 | const char *name, locus *where) | |
4ee9c684 | 243 | { |
244 | tree tmp; | |
245 | tree type; | |
246 | tree var; | |
ee3729de | 247 | tree fault; |
4ee9c684 | 248 | gfc_se start; |
249 | gfc_se end; | |
ee3729de | 250 | char *msg; |
4ee9c684 | 251 | |
252 | type = gfc_get_character_type (kind, ref->u.ss.length); | |
253 | type = build_pointer_type (type); | |
254 | ||
255 | var = NULL_TREE; | |
256 | gfc_init_se (&start, se); | |
9ad09405 | 257 | gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node); |
4ee9c684 | 258 | gfc_add_block_to_block (&se->pre, &start.pre); |
259 | ||
260 | if (integer_onep (start.expr)) | |
260abd71 | 261 | gfc_conv_string_parameter (se); |
4ee9c684 | 262 | else |
263 | { | |
264 | /* Change the start of the string. */ | |
265 | if (TYPE_STRING_FLAG (TREE_TYPE (se->expr))) | |
266 | tmp = se->expr; | |
267 | else | |
4fa2c167 | 268 | tmp = build_fold_indirect_ref (se->expr); |
4ee9c684 | 269 | tmp = gfc_build_array_ref (tmp, start.expr); |
270 | se->expr = gfc_build_addr_expr (type, tmp); | |
271 | } | |
272 | ||
273 | /* Length = end + 1 - start. */ | |
274 | gfc_init_se (&end, se); | |
275 | if (ref->u.ss.end == NULL) | |
276 | end.expr = se->string_length; | |
277 | else | |
278 | { | |
9ad09405 | 279 | gfc_conv_expr_type (&end, ref->u.ss.end, gfc_charlen_type_node); |
4ee9c684 | 280 | gfc_add_block_to_block (&se->pre, &end.pre); |
281 | } | |
ee3729de | 282 | if (flag_bounds_check) |
283 | { | |
53e60566 | 284 | tree nonempty = fold_build2 (LE_EXPR, boolean_type_node, |
285 | start.expr, end.expr); | |
286 | ||
ee3729de | 287 | /* Check lower bound. */ |
288 | fault = fold_build2 (LT_EXPR, boolean_type_node, start.expr, | |
289 | build_int_cst (gfc_charlen_type_node, 1)); | |
53e60566 | 290 | fault = fold_build2 (TRUTH_ANDIF_EXPR, boolean_type_node, |
291 | nonempty, fault); | |
ee3729de | 292 | if (name) |
293 | asprintf (&msg, "Substring out of bounds: lower bound of '%s' " | |
294 | "is less than one", name); | |
295 | else | |
296 | asprintf (&msg, "Substring out of bounds: lower bound " | |
297 | "is less than one"); | |
298 | gfc_trans_runtime_check (fault, msg, &se->pre, where); | |
299 | gfc_free (msg); | |
300 | ||
301 | /* Check upper bound. */ | |
302 | fault = fold_build2 (GT_EXPR, boolean_type_node, end.expr, | |
303 | se->string_length); | |
53e60566 | 304 | fault = fold_build2 (TRUTH_ANDIF_EXPR, boolean_type_node, |
305 | nonempty, fault); | |
ee3729de | 306 | if (name) |
307 | asprintf (&msg, "Substring out of bounds: upper bound of '%s' " | |
308 | "exceeds string length", name); | |
309 | else | |
310 | asprintf (&msg, "Substring out of bounds: upper bound " | |
311 | "exceeds string length"); | |
312 | gfc_trans_runtime_check (fault, msg, &se->pre, where); | |
313 | gfc_free (msg); | |
314 | } | |
315 | ||
ce825331 | 316 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, |
317 | build_int_cst (gfc_charlen_type_node, 1), | |
318 | start.expr); | |
319 | tmp = fold_build2 (PLUS_EXPR, gfc_charlen_type_node, end.expr, tmp); | |
2810b378 | 320 | tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp, |
321 | build_int_cst (gfc_charlen_type_node, 0)); | |
ce825331 | 322 | se->string_length = tmp; |
4ee9c684 | 323 | } |
324 | ||
325 | ||
326 | /* Convert a derived type component reference. */ | |
327 | ||
328 | static void | |
329 | gfc_conv_component_ref (gfc_se * se, gfc_ref * ref) | |
330 | { | |
331 | gfc_component *c; | |
332 | tree tmp; | |
333 | tree decl; | |
334 | tree field; | |
335 | ||
336 | c = ref->u.c.component; | |
337 | ||
22d678e8 | 338 | gcc_assert (c->backend_decl); |
4ee9c684 | 339 | |
340 | field = c->backend_decl; | |
22d678e8 | 341 | gcc_assert (TREE_CODE (field) == FIELD_DECL); |
4ee9c684 | 342 | decl = se->expr; |
ed52ef8b | 343 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE); |
4ee9c684 | 344 | |
345 | se->expr = tmp; | |
346 | ||
347 | if (c->ts.type == BT_CHARACTER) | |
348 | { | |
349 | tmp = c->ts.cl->backend_decl; | |
7949cb07 | 350 | /* Components must always be constant length. */ |
22d678e8 | 351 | gcc_assert (tmp && INTEGER_CST_P (tmp)); |
4ee9c684 | 352 | se->string_length = tmp; |
353 | } | |
354 | ||
dc5fe211 | 355 | if (c->pointer && c->dimension == 0 && c->ts.type != BT_CHARACTER) |
4fa2c167 | 356 | se->expr = build_fold_indirect_ref (se->expr); |
4ee9c684 | 357 | } |
358 | ||
359 | ||
360 | /* Return the contents of a variable. Also handles reference/pointer | |
361 | variables (all Fortran pointer references are implicit). */ | |
362 | ||
363 | static void | |
364 | gfc_conv_variable (gfc_se * se, gfc_expr * expr) | |
365 | { | |
366 | gfc_ref *ref; | |
367 | gfc_symbol *sym; | |
c750cc52 | 368 | tree parent_decl; |
369 | int parent_flag; | |
370 | bool return_value; | |
371 | bool alternate_entry; | |
372 | bool entry_master; | |
4ee9c684 | 373 | |
374 | sym = expr->symtree->n.sym; | |
375 | if (se->ss != NULL) | |
376 | { | |
377 | /* Check that something hasn't gone horribly wrong. */ | |
22d678e8 | 378 | gcc_assert (se->ss != gfc_ss_terminator); |
379 | gcc_assert (se->ss->expr == expr); | |
4ee9c684 | 380 | |
381 | /* A scalarized term. We already know the descriptor. */ | |
382 | se->expr = se->ss->data.info.descriptor; | |
7949cb07 | 383 | se->string_length = se->ss->string_length; |
598d8efb | 384 | for (ref = se->ss->data.info.ref; ref; ref = ref->next) |
385 | if (ref->type == REF_ARRAY && ref->u.ar.type != AR_ELEMENT) | |
386 | break; | |
4ee9c684 | 387 | } |
388 | else | |
389 | { | |
c6871095 | 390 | tree se_expr = NULL_TREE; |
391 | ||
b7bf3f81 | 392 | se->expr = gfc_get_symbol_decl (sym); |
4ee9c684 | 393 | |
c750cc52 | 394 | /* Deal with references to a parent results or entries by storing |
395 | the current_function_decl and moving to the parent_decl. */ | |
c750cc52 | 396 | return_value = sym->attr.function && sym->result == sym; |
397 | alternate_entry = sym->attr.function && sym->attr.entry | |
b01f72f3 | 398 | && sym->result == sym; |
c750cc52 | 399 | entry_master = sym->attr.result |
b01f72f3 | 400 | && sym->ns->proc_name->attr.entry_master |
401 | && !gfc_return_by_reference (sym->ns->proc_name); | |
c750cc52 | 402 | parent_decl = DECL_CONTEXT (current_function_decl); |
403 | ||
404 | if ((se->expr == parent_decl && return_value) | |
b01f72f3 | 405 | || (sym->ns && sym->ns->proc_name |
d77f260f | 406 | && parent_decl |
b01f72f3 | 407 | && sym->ns->proc_name->backend_decl == parent_decl |
408 | && (alternate_entry || entry_master))) | |
c750cc52 | 409 | parent_flag = 1; |
410 | else | |
411 | parent_flag = 0; | |
412 | ||
c6871095 | 413 | /* Special case for assigning the return value of a function. |
414 | Self recursive functions must have an explicit return value. */ | |
b01f72f3 | 415 | if (return_value && (se->expr == current_function_decl || parent_flag)) |
c750cc52 | 416 | se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
c6871095 | 417 | |
418 | /* Similarly for alternate entry points. */ | |
c750cc52 | 419 | else if (alternate_entry |
b01f72f3 | 420 | && (sym->ns->proc_name->backend_decl == current_function_decl |
421 | || parent_flag)) | |
c6871095 | 422 | { |
423 | gfc_entry_list *el = NULL; | |
424 | ||
425 | for (el = sym->ns->entries; el; el = el->next) | |
426 | if (sym == el->sym) | |
427 | { | |
c750cc52 | 428 | se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
c6871095 | 429 | break; |
430 | } | |
431 | } | |
432 | ||
c750cc52 | 433 | else if (entry_master |
b01f72f3 | 434 | && (sym->ns->proc_name->backend_decl == current_function_decl |
435 | || parent_flag)) | |
c750cc52 | 436 | se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
c6871095 | 437 | |
438 | if (se_expr) | |
439 | se->expr = se_expr; | |
440 | ||
4ee9c684 | 441 | /* Procedure actual arguments. */ |
c6871095 | 442 | else if (sym->attr.flavor == FL_PROCEDURE |
443 | && se->expr != current_function_decl) | |
4ee9c684 | 444 | { |
22d678e8 | 445 | gcc_assert (se->want_pointer); |
4ee9c684 | 446 | if (!sym->attr.dummy) |
447 | { | |
22d678e8 | 448 | gcc_assert (TREE_CODE (se->expr) == FUNCTION_DECL); |
9596685a | 449 | se->expr = build_fold_addr_expr (se->expr); |
4ee9c684 | 450 | } |
451 | return; | |
544c333b | 452 | } |
453 | ||
454 | ||
455 | /* Dereference the expression, where needed. Since characters | |
456 | are entirely different from other types, they are treated | |
457 | separately. */ | |
458 | if (sym->ts.type == BT_CHARACTER) | |
459 | { | |
8f6339b6 | 460 | /* Dereference character pointer dummy arguments |
bf7e666b | 461 | or results. */ |
544c333b | 462 | if ((sym->attr.pointer || sym->attr.allocatable) |
4442ee19 | 463 | && (sym->attr.dummy |
464 | || sym->attr.function | |
465 | || sym->attr.result)) | |
4fa2c167 | 466 | se->expr = build_fold_indirect_ref (se->expr); |
8f6339b6 | 467 | |
468 | /* A character with VALUE attribute needs an address | |
469 | expression. */ | |
470 | if (sym->attr.value) | |
471 | se->expr = build_fold_addr_expr (se->expr); | |
472 | ||
544c333b | 473 | } |
8f6339b6 | 474 | else if (!sym->attr.value) |
544c333b | 475 | { |
747a9f62 | 476 | /* Dereference non-character scalar dummy arguments. */ |
4442ee19 | 477 | if (sym->attr.dummy && !sym->attr.dimension) |
4fa2c167 | 478 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 479 | |
bf7e666b | 480 | /* Dereference scalar hidden result. */ |
4442ee19 | 481 | if (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX |
544c333b | 482 | && (sym->attr.function || sym->attr.result) |
ea346118 | 483 | && !sym->attr.dimension && !sym->attr.pointer) |
4fa2c167 | 484 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 485 | |
486 | /* Dereference non-character pointer variables. | |
747a9f62 | 487 | These must be dummies, results, or scalars. */ |
544c333b | 488 | if ((sym->attr.pointer || sym->attr.allocatable) |
4442ee19 | 489 | && (sym->attr.dummy |
490 | || sym->attr.function | |
491 | || sym->attr.result | |
492 | || !sym->attr.dimension)) | |
4fa2c167 | 493 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 494 | } |
495 | ||
4ee9c684 | 496 | ref = expr->ref; |
497 | } | |
498 | ||
499 | /* For character variables, also get the length. */ | |
500 | if (sym->ts.type == BT_CHARACTER) | |
501 | { | |
7af6a4af | 502 | /* If the character length of an entry isn't set, get the length from |
503 | the master function instead. */ | |
504 | if (sym->attr.entry && !sym->ts.cl->backend_decl) | |
505 | se->string_length = sym->ns->proc_name->ts.cl->backend_decl; | |
506 | else | |
507 | se->string_length = sym->ts.cl->backend_decl; | |
22d678e8 | 508 | gcc_assert (se->string_length); |
4ee9c684 | 509 | } |
510 | ||
511 | while (ref) | |
512 | { | |
513 | switch (ref->type) | |
514 | { | |
515 | case REF_ARRAY: | |
516 | /* Return the descriptor if that's what we want and this is an array | |
517 | section reference. */ | |
518 | if (se->descriptor_only && ref->u.ar.type != AR_ELEMENT) | |
519 | return; | |
520 | /* TODO: Pointers to single elements of array sections, eg elemental subs. */ | |
521 | /* Return the descriptor for array pointers and allocations. */ | |
522 | if (se->want_pointer | |
523 | && ref->next == NULL && (se->descriptor_only)) | |
524 | return; | |
525 | ||
97c2a00c | 526 | gfc_conv_array_ref (se, &ref->u.ar, sym, &expr->where); |
4ee9c684 | 527 | /* Return a pointer to an element. */ |
528 | break; | |
529 | ||
530 | case REF_COMPONENT: | |
531 | gfc_conv_component_ref (se, ref); | |
532 | break; | |
533 | ||
534 | case REF_SUBSTRING: | |
ee3729de | 535 | gfc_conv_substring (se, ref, expr->ts.kind, |
536 | expr->symtree->name, &expr->where); | |
4ee9c684 | 537 | break; |
538 | ||
539 | default: | |
22d678e8 | 540 | gcc_unreachable (); |
4ee9c684 | 541 | break; |
542 | } | |
543 | ref = ref->next; | |
544 | } | |
545 | /* Pointer assignment, allocation or pass by reference. Arrays are handled | |
f888a3fb | 546 | separately. */ |
4ee9c684 | 547 | if (se->want_pointer) |
548 | { | |
549 | if (expr->ts.type == BT_CHARACTER) | |
550 | gfc_conv_string_parameter (se); | |
551 | else | |
9596685a | 552 | se->expr = build_fold_addr_expr (se->expr); |
4ee9c684 | 553 | } |
4ee9c684 | 554 | } |
555 | ||
556 | ||
557 | /* Unary ops are easy... Or they would be if ! was a valid op. */ | |
558 | ||
559 | static void | |
560 | gfc_conv_unary_op (enum tree_code code, gfc_se * se, gfc_expr * expr) | |
561 | { | |
562 | gfc_se operand; | |
563 | tree type; | |
564 | ||
22d678e8 | 565 | gcc_assert (expr->ts.type != BT_CHARACTER); |
4ee9c684 | 566 | /* Initialize the operand. */ |
567 | gfc_init_se (&operand, se); | |
9b773341 | 568 | gfc_conv_expr_val (&operand, expr->value.op.op1); |
4ee9c684 | 569 | gfc_add_block_to_block (&se->pre, &operand.pre); |
570 | ||
571 | type = gfc_typenode_for_spec (&expr->ts); | |
572 | ||
573 | /* TRUTH_NOT_EXPR is not a "true" unary operator in GCC. | |
574 | We must convert it to a compare to 0 (e.g. EQ_EXPR (op1, 0)). | |
f888a3fb | 575 | All other unary operators have an equivalent GIMPLE unary operator. */ |
4ee9c684 | 576 | if (code == TRUTH_NOT_EXPR) |
ed52ef8b | 577 | se->expr = build2 (EQ_EXPR, type, operand.expr, |
7d3075f6 | 578 | build_int_cst (type, 0)); |
4ee9c684 | 579 | else |
580 | se->expr = build1 (code, type, operand.expr); | |
581 | ||
582 | } | |
583 | ||
76834664 | 584 | /* Expand power operator to optimal multiplications when a value is raised |
f888a3fb | 585 | to a constant integer n. See section 4.6.3, "Evaluation of Powers" of |
76834664 | 586 | Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer |
587 | Programming", 3rd Edition, 1998. */ | |
588 | ||
589 | /* This code is mostly duplicated from expand_powi in the backend. | |
590 | We establish the "optimal power tree" lookup table with the defined size. | |
591 | The items in the table are the exponents used to calculate the index | |
592 | exponents. Any integer n less than the value can get an "addition chain", | |
593 | with the first node being one. */ | |
594 | #define POWI_TABLE_SIZE 256 | |
595 | ||
f888a3fb | 596 | /* The table is from builtins.c. */ |
76834664 | 597 | static const unsigned char powi_table[POWI_TABLE_SIZE] = |
598 | { | |
599 | 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */ | |
600 | 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */ | |
601 | 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */ | |
602 | 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */ | |
603 | 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */ | |
604 | 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */ | |
605 | 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */ | |
606 | 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */ | |
607 | 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */ | |
608 | 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */ | |
609 | 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */ | |
610 | 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */ | |
611 | 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */ | |
612 | 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */ | |
613 | 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */ | |
614 | 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */ | |
615 | 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */ | |
616 | 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */ | |
617 | 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */ | |
618 | 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */ | |
619 | 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */ | |
620 | 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */ | |
621 | 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */ | |
622 | 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */ | |
623 | 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */ | |
624 | 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */ | |
625 | 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */ | |
626 | 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */ | |
627 | 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */ | |
628 | 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */ | |
629 | 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */ | |
630 | 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */ | |
631 | }; | |
632 | ||
f888a3fb | 633 | /* If n is larger than lookup table's max index, we use the "window |
634 | method". */ | |
76834664 | 635 | #define POWI_WINDOW_SIZE 3 |
636 | ||
f888a3fb | 637 | /* Recursive function to expand the power operator. The temporary |
638 | values are put in tmpvar. The function returns tmpvar[1] ** n. */ | |
76834664 | 639 | static tree |
6929935b | 640 | gfc_conv_powi (gfc_se * se, unsigned HOST_WIDE_INT n, tree * tmpvar) |
4ee9c684 | 641 | { |
76834664 | 642 | tree op0; |
643 | tree op1; | |
4ee9c684 | 644 | tree tmp; |
76834664 | 645 | int digit; |
4ee9c684 | 646 | |
76834664 | 647 | if (n < POWI_TABLE_SIZE) |
4ee9c684 | 648 | { |
76834664 | 649 | if (tmpvar[n]) |
650 | return tmpvar[n]; | |
4ee9c684 | 651 | |
76834664 | 652 | op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar); |
653 | op1 = gfc_conv_powi (se, powi_table[n], tmpvar); | |
654 | } | |
655 | else if (n & 1) | |
656 | { | |
657 | digit = n & ((1 << POWI_WINDOW_SIZE) - 1); | |
658 | op0 = gfc_conv_powi (se, n - digit, tmpvar); | |
659 | op1 = gfc_conv_powi (se, digit, tmpvar); | |
4ee9c684 | 660 | } |
661 | else | |
662 | { | |
76834664 | 663 | op0 = gfc_conv_powi (se, n >> 1, tmpvar); |
664 | op1 = op0; | |
4ee9c684 | 665 | } |
666 | ||
318c9b27 | 667 | tmp = fold_build2 (MULT_EXPR, TREE_TYPE (op0), op0, op1); |
76834664 | 668 | tmp = gfc_evaluate_now (tmp, &se->pre); |
4ee9c684 | 669 | |
76834664 | 670 | if (n < POWI_TABLE_SIZE) |
671 | tmpvar[n] = tmp; | |
4ee9c684 | 672 | |
76834664 | 673 | return tmp; |
674 | } | |
4ee9c684 | 675 | |
f888a3fb | 676 | |
677 | /* Expand lhs ** rhs. rhs is a constant integer. If it expands successfully, | |
678 | return 1. Else return 0 and a call to runtime library functions | |
679 | will have to be built. */ | |
76834664 | 680 | static int |
681 | gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs) | |
682 | { | |
683 | tree cond; | |
684 | tree tmp; | |
685 | tree type; | |
686 | tree vartmp[POWI_TABLE_SIZE]; | |
6929935b | 687 | HOST_WIDE_INT m; |
688 | unsigned HOST_WIDE_INT n; | |
76834664 | 689 | int sgn; |
4ee9c684 | 690 | |
6929935b | 691 | /* If exponent is too large, we won't expand it anyway, so don't bother |
692 | with large integer values. */ | |
693 | if (!double_int_fits_in_shwi_p (TREE_INT_CST (rhs))) | |
694 | return 0; | |
695 | ||
696 | m = double_int_to_shwi (TREE_INT_CST (rhs)); | |
697 | /* There's no ABS for HOST_WIDE_INT, so here we go. It also takes care | |
698 | of the asymmetric range of the integer type. */ | |
699 | n = (unsigned HOST_WIDE_INT) (m < 0 ? -m : m); | |
700 | ||
76834664 | 701 | type = TREE_TYPE (lhs); |
76834664 | 702 | sgn = tree_int_cst_sgn (rhs); |
4ee9c684 | 703 | |
6929935b | 704 | if (((FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations) |
705 | || optimize_size) && (m > 2 || m < -1)) | |
76834664 | 706 | return 0; |
4ee9c684 | 707 | |
76834664 | 708 | /* rhs == 0 */ |
709 | if (sgn == 0) | |
710 | { | |
711 | se->expr = gfc_build_const (type, integer_one_node); | |
712 | return 1; | |
713 | } | |
6929935b | 714 | |
76834664 | 715 | /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */ |
716 | if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE)) | |
717 | { | |
ed52ef8b | 718 | tmp = build2 (EQ_EXPR, boolean_type_node, lhs, |
7d3075f6 | 719 | build_int_cst (TREE_TYPE (lhs), -1)); |
ed52ef8b | 720 | cond = build2 (EQ_EXPR, boolean_type_node, lhs, |
7d3075f6 | 721 | build_int_cst (TREE_TYPE (lhs), 1)); |
76834664 | 722 | |
f888a3fb | 723 | /* If rhs is even, |
260abd71 | 724 | result = (lhs == 1 || lhs == -1) ? 1 : 0. */ |
76834664 | 725 | if ((n & 1) == 0) |
726 | { | |
ed52ef8b | 727 | tmp = build2 (TRUTH_OR_EXPR, boolean_type_node, tmp, cond); |
7d3075f6 | 728 | se->expr = build3 (COND_EXPR, type, tmp, build_int_cst (type, 1), |
729 | build_int_cst (type, 0)); | |
76834664 | 730 | return 1; |
731 | } | |
f888a3fb | 732 | /* If rhs is odd, |
76834664 | 733 | result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */ |
7d3075f6 | 734 | tmp = build3 (COND_EXPR, type, tmp, build_int_cst (type, -1), |
735 | build_int_cst (type, 0)); | |
736 | se->expr = build3 (COND_EXPR, type, cond, build_int_cst (type, 1), tmp); | |
76834664 | 737 | return 1; |
738 | } | |
4ee9c684 | 739 | |
76834664 | 740 | memset (vartmp, 0, sizeof (vartmp)); |
741 | vartmp[1] = lhs; | |
76834664 | 742 | if (sgn == -1) |
743 | { | |
744 | tmp = gfc_build_const (type, integer_one_node); | |
ed52ef8b | 745 | vartmp[1] = build2 (RDIV_EXPR, type, tmp, vartmp[1]); |
76834664 | 746 | } |
f5efe504 | 747 | |
748 | se->expr = gfc_conv_powi (se, n, vartmp); | |
749 | ||
76834664 | 750 | return 1; |
4ee9c684 | 751 | } |
752 | ||
753 | ||
76834664 | 754 | /* Power op (**). Constant integer exponent has special handling. */ |
4ee9c684 | 755 | |
756 | static void | |
757 | gfc_conv_power_op (gfc_se * se, gfc_expr * expr) | |
758 | { | |
90ba9145 | 759 | tree gfc_int4_type_node; |
4ee9c684 | 760 | int kind; |
76834664 | 761 | int ikind; |
4ee9c684 | 762 | gfc_se lse; |
763 | gfc_se rse; | |
764 | tree fndecl; | |
4ee9c684 | 765 | |
766 | gfc_init_se (&lse, se); | |
9b773341 | 767 | gfc_conv_expr_val (&lse, expr->value.op.op1); |
7f0345dc | 768 | lse.expr = gfc_evaluate_now (lse.expr, &lse.pre); |
4ee9c684 | 769 | gfc_add_block_to_block (&se->pre, &lse.pre); |
770 | ||
771 | gfc_init_se (&rse, se); | |
9b773341 | 772 | gfc_conv_expr_val (&rse, expr->value.op.op2); |
4ee9c684 | 773 | gfc_add_block_to_block (&se->pre, &rse.pre); |
774 | ||
9b773341 | 775 | if (expr->value.op.op2->ts.type == BT_INTEGER |
776 | && expr->value.op.op2->expr_type == EXPR_CONSTANT) | |
76834664 | 777 | if (gfc_conv_cst_int_power (se, lse.expr, rse.expr)) |
778 | return; | |
4ee9c684 | 779 | |
90ba9145 | 780 | gfc_int4_type_node = gfc_get_int_type (4); |
781 | ||
9b773341 | 782 | kind = expr->value.op.op1->ts.kind; |
783 | switch (expr->value.op.op2->ts.type) | |
4ee9c684 | 784 | { |
785 | case BT_INTEGER: | |
9b773341 | 786 | ikind = expr->value.op.op2->ts.kind; |
76834664 | 787 | switch (ikind) |
788 | { | |
789 | case 1: | |
790 | case 2: | |
791 | rse.expr = convert (gfc_int4_type_node, rse.expr); | |
792 | /* Fall through. */ | |
793 | ||
794 | case 4: | |
795 | ikind = 0; | |
796 | break; | |
797 | ||
798 | case 8: | |
799 | ikind = 1; | |
800 | break; | |
801 | ||
920e54ef | 802 | case 16: |
803 | ikind = 2; | |
804 | break; | |
805 | ||
76834664 | 806 | default: |
22d678e8 | 807 | gcc_unreachable (); |
76834664 | 808 | } |
809 | switch (kind) | |
810 | { | |
811 | case 1: | |
812 | case 2: | |
9b773341 | 813 | if (expr->value.op.op1->ts.type == BT_INTEGER) |
76834664 | 814 | lse.expr = convert (gfc_int4_type_node, lse.expr); |
815 | else | |
22d678e8 | 816 | gcc_unreachable (); |
76834664 | 817 | /* Fall through. */ |
818 | ||
819 | case 4: | |
820 | kind = 0; | |
821 | break; | |
822 | ||
823 | case 8: | |
824 | kind = 1; | |
825 | break; | |
826 | ||
920e54ef | 827 | case 10: |
828 | kind = 2; | |
829 | break; | |
830 | ||
831 | case 16: | |
832 | kind = 3; | |
833 | break; | |
834 | ||
76834664 | 835 | default: |
22d678e8 | 836 | gcc_unreachable (); |
76834664 | 837 | } |
838 | ||
9b773341 | 839 | switch (expr->value.op.op1->ts.type) |
76834664 | 840 | { |
841 | case BT_INTEGER: | |
920e54ef | 842 | if (kind == 3) /* Case 16 was not handled properly above. */ |
843 | kind = 2; | |
76834664 | 844 | fndecl = gfor_fndecl_math_powi[kind][ikind].integer; |
845 | break; | |
846 | ||
847 | case BT_REAL: | |
848 | fndecl = gfor_fndecl_math_powi[kind][ikind].real; | |
849 | break; | |
850 | ||
851 | case BT_COMPLEX: | |
852 | fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx; | |
853 | break; | |
854 | ||
855 | default: | |
22d678e8 | 856 | gcc_unreachable (); |
76834664 | 857 | } |
858 | break; | |
4ee9c684 | 859 | |
860 | case BT_REAL: | |
861 | switch (kind) | |
862 | { | |
863 | case 4: | |
76834664 | 864 | fndecl = built_in_decls[BUILT_IN_POWF]; |
4ee9c684 | 865 | break; |
866 | case 8: | |
76834664 | 867 | fndecl = built_in_decls[BUILT_IN_POW]; |
4ee9c684 | 868 | break; |
920e54ef | 869 | case 10: |
870 | case 16: | |
871 | fndecl = built_in_decls[BUILT_IN_POWL]; | |
872 | break; | |
4ee9c684 | 873 | default: |
22d678e8 | 874 | gcc_unreachable (); |
4ee9c684 | 875 | } |
876 | break; | |
877 | ||
878 | case BT_COMPLEX: | |
879 | switch (kind) | |
880 | { | |
881 | case 4: | |
882 | fndecl = gfor_fndecl_math_cpowf; | |
883 | break; | |
884 | case 8: | |
885 | fndecl = gfor_fndecl_math_cpow; | |
886 | break; | |
920e54ef | 887 | case 10: |
888 | fndecl = gfor_fndecl_math_cpowl10; | |
889 | break; | |
890 | case 16: | |
891 | fndecl = gfor_fndecl_math_cpowl16; | |
892 | break; | |
4ee9c684 | 893 | default: |
22d678e8 | 894 | gcc_unreachable (); |
4ee9c684 | 895 | } |
896 | break; | |
897 | ||
898 | default: | |
22d678e8 | 899 | gcc_unreachable (); |
4ee9c684 | 900 | break; |
901 | } | |
902 | ||
c2f47e15 | 903 | se->expr = build_call_expr (fndecl, 2, lse.expr, rse.expr); |
4ee9c684 | 904 | } |
905 | ||
906 | ||
907 | /* Generate code to allocate a string temporary. */ | |
908 | ||
909 | tree | |
910 | gfc_conv_string_tmp (gfc_se * se, tree type, tree len) | |
911 | { | |
912 | tree var; | |
913 | tree tmp; | |
4ee9c684 | 914 | |
22d678e8 | 915 | gcc_assert (TREE_TYPE (len) == gfc_charlen_type_node); |
260abd71 | 916 | |
4ee9c684 | 917 | if (gfc_can_put_var_on_stack (len)) |
918 | { | |
919 | /* Create a temporary variable to hold the result. */ | |
318c9b27 | 920 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, |
7d3075f6 | 921 | build_int_cst (gfc_charlen_type_node, 1)); |
260abd71 | 922 | tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp); |
4ee9c684 | 923 | tmp = build_array_type (gfc_character1_type_node, tmp); |
924 | var = gfc_create_var (tmp, "str"); | |
925 | var = gfc_build_addr_expr (type, var); | |
926 | } | |
927 | else | |
928 | { | |
929 | /* Allocate a temporary to hold the result. */ | |
930 | var = gfc_create_var (type, "pstr"); | |
c2f47e15 | 931 | tmp = build_call_expr (gfor_fndecl_internal_malloc, 1, len); |
4ee9c684 | 932 | tmp = convert (type, tmp); |
933 | gfc_add_modify_expr (&se->pre, var, tmp); | |
934 | ||
935 | /* Free the temporary afterwards. */ | |
936 | tmp = convert (pvoid_type_node, var); | |
c2f47e15 | 937 | tmp = build_call_expr (gfor_fndecl_internal_free, 1, tmp); |
4ee9c684 | 938 | gfc_add_expr_to_block (&se->post, tmp); |
939 | } | |
940 | ||
941 | return var; | |
942 | } | |
943 | ||
944 | ||
945 | /* Handle a string concatenation operation. A temporary will be allocated to | |
946 | hold the result. */ | |
947 | ||
948 | static void | |
949 | gfc_conv_concat_op (gfc_se * se, gfc_expr * expr) | |
950 | { | |
951 | gfc_se lse; | |
952 | gfc_se rse; | |
953 | tree len; | |
954 | tree type; | |
955 | tree var; | |
4ee9c684 | 956 | tree tmp; |
957 | ||
9b773341 | 958 | gcc_assert (expr->value.op.op1->ts.type == BT_CHARACTER |
959 | && expr->value.op.op2->ts.type == BT_CHARACTER); | |
4ee9c684 | 960 | |
961 | gfc_init_se (&lse, se); | |
9b773341 | 962 | gfc_conv_expr (&lse, expr->value.op.op1); |
4ee9c684 | 963 | gfc_conv_string_parameter (&lse); |
964 | gfc_init_se (&rse, se); | |
9b773341 | 965 | gfc_conv_expr (&rse, expr->value.op.op2); |
4ee9c684 | 966 | gfc_conv_string_parameter (&rse); |
967 | ||
968 | gfc_add_block_to_block (&se->pre, &lse.pre); | |
969 | gfc_add_block_to_block (&se->pre, &rse.pre); | |
970 | ||
971 | type = gfc_get_character_type (expr->ts.kind, expr->ts.cl); | |
972 | len = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); | |
973 | if (len == NULL_TREE) | |
974 | { | |
318c9b27 | 975 | len = fold_build2 (PLUS_EXPR, TREE_TYPE (lse.string_length), |
976 | lse.string_length, rse.string_length); | |
4ee9c684 | 977 | } |
978 | ||
979 | type = build_pointer_type (type); | |
980 | ||
981 | var = gfc_conv_string_tmp (se, type, len); | |
982 | ||
983 | /* Do the actual concatenation. */ | |
c2f47e15 | 984 | tmp = build_call_expr (gfor_fndecl_concat_string, 6, |
985 | len, var, | |
986 | lse.string_length, lse.expr, | |
987 | rse.string_length, rse.expr); | |
4ee9c684 | 988 | gfc_add_expr_to_block (&se->pre, tmp); |
989 | ||
990 | /* Add the cleanup for the operands. */ | |
991 | gfc_add_block_to_block (&se->pre, &rse.post); | |
992 | gfc_add_block_to_block (&se->pre, &lse.post); | |
993 | ||
994 | se->expr = var; | |
995 | se->string_length = len; | |
996 | } | |
997 | ||
4ee9c684 | 998 | /* Translates an op expression. Common (binary) cases are handled by this |
999 | function, others are passed on. Recursion is used in either case. | |
1000 | We use the fact that (op1.ts == op2.ts) (except for the power | |
f888a3fb | 1001 | operator **). |
4ee9c684 | 1002 | Operators need no special handling for scalarized expressions as long as |
f888a3fb | 1003 | they call gfc_conv_simple_val to get their operands. |
4ee9c684 | 1004 | Character strings get special handling. */ |
1005 | ||
1006 | static void | |
1007 | gfc_conv_expr_op (gfc_se * se, gfc_expr * expr) | |
1008 | { | |
1009 | enum tree_code code; | |
1010 | gfc_se lse; | |
1011 | gfc_se rse; | |
1012 | tree type; | |
1013 | tree tmp; | |
1014 | int lop; | |
1015 | int checkstring; | |
1016 | ||
1017 | checkstring = 0; | |
1018 | lop = 0; | |
9b773341 | 1019 | switch (expr->value.op.operator) |
4ee9c684 | 1020 | { |
1021 | case INTRINSIC_UPLUS: | |
42b215cc | 1022 | case INTRINSIC_PARENTHESES: |
9b773341 | 1023 | gfc_conv_expr (se, expr->value.op.op1); |
4ee9c684 | 1024 | return; |
1025 | ||
1026 | case INTRINSIC_UMINUS: | |
1027 | gfc_conv_unary_op (NEGATE_EXPR, se, expr); | |
1028 | return; | |
1029 | ||
1030 | case INTRINSIC_NOT: | |
1031 | gfc_conv_unary_op (TRUTH_NOT_EXPR, se, expr); | |
1032 | return; | |
1033 | ||
1034 | case INTRINSIC_PLUS: | |
1035 | code = PLUS_EXPR; | |
1036 | break; | |
1037 | ||
1038 | case INTRINSIC_MINUS: | |
1039 | code = MINUS_EXPR; | |
1040 | break; | |
1041 | ||
1042 | case INTRINSIC_TIMES: | |
1043 | code = MULT_EXPR; | |
1044 | break; | |
1045 | ||
1046 | case INTRINSIC_DIVIDE: | |
1047 | /* If expr is a real or complex expr, use an RDIV_EXPR. If op1 is | |
1048 | an integer, we must round towards zero, so we use a | |
1049 | TRUNC_DIV_EXPR. */ | |
1050 | if (expr->ts.type == BT_INTEGER) | |
1051 | code = TRUNC_DIV_EXPR; | |
1052 | else | |
1053 | code = RDIV_EXPR; | |
1054 | break; | |
1055 | ||
1056 | case INTRINSIC_POWER: | |
1057 | gfc_conv_power_op (se, expr); | |
1058 | return; | |
1059 | ||
1060 | case INTRINSIC_CONCAT: | |
1061 | gfc_conv_concat_op (se, expr); | |
1062 | return; | |
1063 | ||
1064 | case INTRINSIC_AND: | |
1065 | code = TRUTH_ANDIF_EXPR; | |
1066 | lop = 1; | |
1067 | break; | |
1068 | ||
1069 | case INTRINSIC_OR: | |
1070 | code = TRUTH_ORIF_EXPR; | |
1071 | lop = 1; | |
1072 | break; | |
1073 | ||
1074 | /* EQV and NEQV only work on logicals, but since we represent them | |
88bce636 | 1075 | as integers, we can use EQ_EXPR and NE_EXPR for them in GIMPLE. */ |
4ee9c684 | 1076 | case INTRINSIC_EQ: |
1077 | case INTRINSIC_EQV: | |
1078 | code = EQ_EXPR; | |
1079 | checkstring = 1; | |
1080 | lop = 1; | |
1081 | break; | |
1082 | ||
1083 | case INTRINSIC_NE: | |
1084 | case INTRINSIC_NEQV: | |
1085 | code = NE_EXPR; | |
1086 | checkstring = 1; | |
1087 | lop = 1; | |
1088 | break; | |
1089 | ||
1090 | case INTRINSIC_GT: | |
1091 | code = GT_EXPR; | |
1092 | checkstring = 1; | |
1093 | lop = 1; | |
1094 | break; | |
1095 | ||
1096 | case INTRINSIC_GE: | |
1097 | code = GE_EXPR; | |
1098 | checkstring = 1; | |
1099 | lop = 1; | |
1100 | break; | |
1101 | ||
1102 | case INTRINSIC_LT: | |
1103 | code = LT_EXPR; | |
1104 | checkstring = 1; | |
1105 | lop = 1; | |
1106 | break; | |
1107 | ||
1108 | case INTRINSIC_LE: | |
1109 | code = LE_EXPR; | |
1110 | checkstring = 1; | |
1111 | lop = 1; | |
1112 | break; | |
1113 | ||
1114 | case INTRINSIC_USER: | |
1115 | case INTRINSIC_ASSIGN: | |
1116 | /* These should be converted into function calls by the frontend. */ | |
22d678e8 | 1117 | gcc_unreachable (); |
4ee9c684 | 1118 | |
1119 | default: | |
1120 | fatal_error ("Unknown intrinsic op"); | |
1121 | return; | |
1122 | } | |
1123 | ||
f888a3fb | 1124 | /* The only exception to this is **, which is handled separately anyway. */ |
9b773341 | 1125 | gcc_assert (expr->value.op.op1->ts.type == expr->value.op.op2->ts.type); |
4ee9c684 | 1126 | |
9b773341 | 1127 | if (checkstring && expr->value.op.op1->ts.type != BT_CHARACTER) |
4ee9c684 | 1128 | checkstring = 0; |
1129 | ||
1130 | /* lhs */ | |
1131 | gfc_init_se (&lse, se); | |
9b773341 | 1132 | gfc_conv_expr (&lse, expr->value.op.op1); |
4ee9c684 | 1133 | gfc_add_block_to_block (&se->pre, &lse.pre); |
1134 | ||
1135 | /* rhs */ | |
1136 | gfc_init_se (&rse, se); | |
9b773341 | 1137 | gfc_conv_expr (&rse, expr->value.op.op2); |
4ee9c684 | 1138 | gfc_add_block_to_block (&se->pre, &rse.pre); |
1139 | ||
4ee9c684 | 1140 | if (checkstring) |
1141 | { | |
1142 | gfc_conv_string_parameter (&lse); | |
1143 | gfc_conv_string_parameter (&rse); | |
4ee9c684 | 1144 | |
77100724 | 1145 | lse.expr = gfc_build_compare_string (lse.string_length, lse.expr, |
1146 | rse.string_length, rse.expr); | |
4ee9c684 | 1147 | rse.expr = integer_zero_node; |
77100724 | 1148 | gfc_add_block_to_block (&lse.post, &rse.post); |
4ee9c684 | 1149 | } |
1150 | ||
1151 | type = gfc_typenode_for_spec (&expr->ts); | |
1152 | ||
1153 | if (lop) | |
1154 | { | |
1155 | /* The result of logical ops is always boolean_type_node. */ | |
318c9b27 | 1156 | tmp = fold_build2 (code, type, lse.expr, rse.expr); |
4ee9c684 | 1157 | se->expr = convert (type, tmp); |
1158 | } | |
1159 | else | |
318c9b27 | 1160 | se->expr = fold_build2 (code, type, lse.expr, rse.expr); |
4ee9c684 | 1161 | |
4ee9c684 | 1162 | /* Add the post blocks. */ |
1163 | gfc_add_block_to_block (&se->post, &rse.post); | |
1164 | gfc_add_block_to_block (&se->post, &lse.post); | |
1165 | } | |
1166 | ||
77100724 | 1167 | /* If a string's length is one, we convert it to a single character. */ |
1168 | ||
1169 | static tree | |
1170 | gfc_to_single_character (tree len, tree str) | |
1171 | { | |
1172 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (str))); | |
1173 | ||
1174 | if (INTEGER_CST_P (len) && TREE_INT_CST_LOW (len) == 1 | |
1175 | && TREE_INT_CST_HIGH (len) == 0) | |
1176 | { | |
1177 | str = fold_convert (pchar_type_node, str); | |
1178 | return build_fold_indirect_ref (str); | |
1179 | } | |
1180 | ||
1181 | return NULL_TREE; | |
1182 | } | |
1183 | ||
1184 | /* Compare two strings. If they are all single characters, the result is the | |
1185 | subtraction of them. Otherwise, we build a library call. */ | |
1186 | ||
1187 | tree | |
1188 | gfc_build_compare_string (tree len1, tree str1, tree len2, tree str2) | |
1189 | { | |
1190 | tree sc1; | |
1191 | tree sc2; | |
1192 | tree type; | |
1193 | tree tmp; | |
1194 | ||
1195 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (str1))); | |
1196 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (str2))); | |
1197 | ||
1198 | type = gfc_get_int_type (gfc_default_integer_kind); | |
1199 | ||
1200 | sc1 = gfc_to_single_character (len1, str1); | |
1201 | sc2 = gfc_to_single_character (len2, str2); | |
1202 | ||
1203 | /* Deal with single character specially. */ | |
1204 | if (sc1 != NULL_TREE && sc2 != NULL_TREE) | |
1205 | { | |
1206 | sc1 = fold_convert (type, sc1); | |
1207 | sc2 = fold_convert (type, sc2); | |
1208 | tmp = fold_build2 (MINUS_EXPR, type, sc1, sc2); | |
1209 | } | |
1210 | else | |
c2f47e15 | 1211 | /* Build a call for the comparison. */ |
1212 | tmp = build_call_expr (gfor_fndecl_compare_string, 4, | |
1213 | len1, str1, len2, str2); | |
77100724 | 1214 | return tmp; |
1215 | } | |
f888a3fb | 1216 | |
4ee9c684 | 1217 | static void |
1218 | gfc_conv_function_val (gfc_se * se, gfc_symbol * sym) | |
1219 | { | |
1220 | tree tmp; | |
1221 | ||
1222 | if (sym->attr.dummy) | |
1223 | { | |
1224 | tmp = gfc_get_symbol_decl (sym); | |
22d678e8 | 1225 | gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE |
4ee9c684 | 1226 | && TREE_CODE (TREE_TYPE (TREE_TYPE (tmp))) == FUNCTION_TYPE); |
4ee9c684 | 1227 | } |
1228 | else | |
1229 | { | |
1230 | if (!sym->backend_decl) | |
1231 | sym->backend_decl = gfc_get_extern_function_decl (sym); | |
1232 | ||
1233 | tmp = sym->backend_decl; | |
a7c1e504 | 1234 | if (sym->attr.cray_pointee) |
1235 | tmp = convert (build_pointer_type (TREE_TYPE (tmp)), | |
1236 | gfc_get_symbol_decl (sym->cp_pointer)); | |
08569428 | 1237 | if (!POINTER_TYPE_P (TREE_TYPE (tmp))) |
1238 | { | |
1239 | gcc_assert (TREE_CODE (tmp) == FUNCTION_DECL); | |
9596685a | 1240 | tmp = build_fold_addr_expr (tmp); |
08569428 | 1241 | } |
1242 | } | |
1243 | se->expr = tmp; | |
1244 | } | |
1245 | ||
1246 | ||
74f588f2 | 1247 | /* Translate the call for an elemental subroutine call used in an operator |
1248 | assignment. This is a simplified version of gfc_conv_function_call. */ | |
1249 | ||
1250 | tree | |
1251 | gfc_conv_operator_assign (gfc_se *lse, gfc_se *rse, gfc_symbol *sym) | |
1252 | { | |
1253 | tree args; | |
1254 | tree tmp; | |
1255 | gfc_se se; | |
1256 | stmtblock_t block; | |
1257 | ||
1258 | /* Only elemental subroutines with two arguments. */ | |
1259 | gcc_assert (sym->attr.elemental && sym->attr.subroutine); | |
1260 | gcc_assert (sym->formal->next->next == NULL); | |
1261 | ||
1262 | gfc_init_block (&block); | |
1263 | ||
1264 | gfc_add_block_to_block (&block, &lse->pre); | |
1265 | gfc_add_block_to_block (&block, &rse->pre); | |
1266 | ||
1267 | /* Build the argument list for the call, including hidden string lengths. */ | |
1268 | args = gfc_chainon_list (NULL_TREE, build_fold_addr_expr (lse->expr)); | |
1269 | args = gfc_chainon_list (args, build_fold_addr_expr (rse->expr)); | |
1270 | if (lse->string_length != NULL_TREE) | |
1271 | args = gfc_chainon_list (args, lse->string_length); | |
1272 | if (rse->string_length != NULL_TREE) | |
1273 | args = gfc_chainon_list (args, rse->string_length); | |
1274 | ||
1275 | /* Build the function call. */ | |
1276 | gfc_init_se (&se, NULL); | |
1277 | gfc_conv_function_val (&se, sym); | |
1278 | tmp = TREE_TYPE (TREE_TYPE (TREE_TYPE (se.expr))); | |
c2f47e15 | 1279 | tmp = build_call_list (tmp, se.expr, args); |
74f588f2 | 1280 | gfc_add_expr_to_block (&block, tmp); |
1281 | ||
1282 | gfc_add_block_to_block (&block, &lse->post); | |
1283 | gfc_add_block_to_block (&block, &rse->post); | |
1284 | ||
1285 | return gfc_finish_block (&block); | |
1286 | } | |
1287 | ||
1288 | ||
08569428 | 1289 | /* Initialize MAPPING. */ |
1290 | ||
f45a476e | 1291 | void |
08569428 | 1292 | gfc_init_interface_mapping (gfc_interface_mapping * mapping) |
1293 | { | |
1294 | mapping->syms = NULL; | |
1295 | mapping->charlens = NULL; | |
1296 | } | |
1297 | ||
1298 | ||
1299 | /* Free all memory held by MAPPING (but not MAPPING itself). */ | |
1300 | ||
f45a476e | 1301 | void |
08569428 | 1302 | gfc_free_interface_mapping (gfc_interface_mapping * mapping) |
1303 | { | |
1304 | gfc_interface_sym_mapping *sym; | |
1305 | gfc_interface_sym_mapping *nextsym; | |
1306 | gfc_charlen *cl; | |
1307 | gfc_charlen *nextcl; | |
1308 | ||
1309 | for (sym = mapping->syms; sym; sym = nextsym) | |
1310 | { | |
1311 | nextsym = sym->next; | |
1312 | gfc_free_symbol (sym->new->n.sym); | |
1313 | gfc_free (sym->new); | |
1314 | gfc_free (sym); | |
1315 | } | |
1316 | for (cl = mapping->charlens; cl; cl = nextcl) | |
1317 | { | |
1318 | nextcl = cl->next; | |
1319 | gfc_free_expr (cl->length); | |
1320 | gfc_free (cl); | |
4ee9c684 | 1321 | } |
1322 | } | |
1323 | ||
1324 | ||
08569428 | 1325 | /* Return a copy of gfc_charlen CL. Add the returned structure to |
1326 | MAPPING so that it will be freed by gfc_free_interface_mapping. */ | |
1327 | ||
1328 | static gfc_charlen * | |
1329 | gfc_get_interface_mapping_charlen (gfc_interface_mapping * mapping, | |
1330 | gfc_charlen * cl) | |
1331 | { | |
1332 | gfc_charlen *new; | |
1333 | ||
1334 | new = gfc_get_charlen (); | |
1335 | new->next = mapping->charlens; | |
1336 | new->length = gfc_copy_expr (cl->length); | |
1337 | ||
1338 | mapping->charlens = new; | |
1339 | return new; | |
1340 | } | |
1341 | ||
1342 | ||
1343 | /* A subroutine of gfc_add_interface_mapping. Return a descriptorless | |
1344 | array variable that can be used as the actual argument for dummy | |
1345 | argument SYM. Add any initialization code to BLOCK. PACKED is as | |
1346 | for gfc_get_nodesc_array_type and DATA points to the first element | |
1347 | in the passed array. */ | |
1348 | ||
1349 | static tree | |
1350 | gfc_get_interface_mapping_array (stmtblock_t * block, gfc_symbol * sym, | |
3d8dea5a | 1351 | gfc_packed packed, tree data) |
08569428 | 1352 | { |
1353 | tree type; | |
1354 | tree var; | |
1355 | ||
1356 | type = gfc_typenode_for_spec (&sym->ts); | |
1357 | type = gfc_get_nodesc_array_type (type, sym->as, packed); | |
1358 | ||
5e8cd291 | 1359 | var = gfc_create_var (type, "ifm"); |
08569428 | 1360 | gfc_add_modify_expr (block, var, fold_convert (type, data)); |
1361 | ||
1362 | return var; | |
1363 | } | |
1364 | ||
1365 | ||
1366 | /* A subroutine of gfc_add_interface_mapping. Set the stride, upper bounds | |
1367 | and offset of descriptorless array type TYPE given that it has the same | |
1368 | size as DESC. Add any set-up code to BLOCK. */ | |
1369 | ||
1370 | static void | |
1371 | gfc_set_interface_mapping_bounds (stmtblock_t * block, tree type, tree desc) | |
1372 | { | |
1373 | int n; | |
1374 | tree dim; | |
1375 | tree offset; | |
1376 | tree tmp; | |
1377 | ||
1378 | offset = gfc_index_zero_node; | |
1379 | for (n = 0; n < GFC_TYPE_ARRAY_RANK (type); n++) | |
1380 | { | |
926b9532 | 1381 | dim = gfc_rank_cst[n]; |
08569428 | 1382 | GFC_TYPE_ARRAY_STRIDE (type, n) = gfc_conv_array_stride (desc, n); |
926b9532 | 1383 | if (GFC_TYPE_ARRAY_LBOUND (type, n) == NULL_TREE) |
1384 | { | |
1385 | GFC_TYPE_ARRAY_LBOUND (type, n) | |
1386 | = gfc_conv_descriptor_lbound (desc, dim); | |
1387 | GFC_TYPE_ARRAY_UBOUND (type, n) | |
1388 | = gfc_conv_descriptor_ubound (desc, dim); | |
1389 | } | |
1390 | else if (GFC_TYPE_ARRAY_UBOUND (type, n) == NULL_TREE) | |
08569428 | 1391 | { |
08569428 | 1392 | tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, |
1393 | gfc_conv_descriptor_ubound (desc, dim), | |
1394 | gfc_conv_descriptor_lbound (desc, dim)); | |
1395 | tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1396 | GFC_TYPE_ARRAY_LBOUND (type, n), | |
1397 | tmp); | |
1398 | tmp = gfc_evaluate_now (tmp, block); | |
1399 | GFC_TYPE_ARRAY_UBOUND (type, n) = tmp; | |
1400 | } | |
1401 | tmp = fold_build2 (MULT_EXPR, gfc_array_index_type, | |
1402 | GFC_TYPE_ARRAY_LBOUND (type, n), | |
1403 | GFC_TYPE_ARRAY_STRIDE (type, n)); | |
1404 | offset = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp); | |
1405 | } | |
1406 | offset = gfc_evaluate_now (offset, block); | |
1407 | GFC_TYPE_ARRAY_OFFSET (type) = offset; | |
1408 | } | |
1409 | ||
1410 | ||
1411 | /* Extend MAPPING so that it maps dummy argument SYM to the value stored | |
1412 | in SE. The caller may still use se->expr and se->string_length after | |
1413 | calling this function. */ | |
1414 | ||
f45a476e | 1415 | void |
08569428 | 1416 | gfc_add_interface_mapping (gfc_interface_mapping * mapping, |
1417 | gfc_symbol * sym, gfc_se * se) | |
1418 | { | |
1419 | gfc_interface_sym_mapping *sm; | |
1420 | tree desc; | |
1421 | tree tmp; | |
1422 | tree value; | |
1423 | gfc_symbol *new_sym; | |
1424 | gfc_symtree *root; | |
1425 | gfc_symtree *new_symtree; | |
1426 | ||
1427 | /* Create a new symbol to represent the actual argument. */ | |
1428 | new_sym = gfc_new_symbol (sym->name, NULL); | |
1429 | new_sym->ts = sym->ts; | |
1430 | new_sym->attr.referenced = 1; | |
1431 | new_sym->attr.dimension = sym->attr.dimension; | |
1432 | new_sym->attr.pointer = sym->attr.pointer; | |
76845580 | 1433 | new_sym->attr.allocatable = sym->attr.allocatable; |
08569428 | 1434 | new_sym->attr.flavor = sym->attr.flavor; |
1435 | ||
1436 | /* Create a fake symtree for it. */ | |
1437 | root = NULL; | |
1438 | new_symtree = gfc_new_symtree (&root, sym->name); | |
1439 | new_symtree->n.sym = new_sym; | |
1440 | gcc_assert (new_symtree == root); | |
1441 | ||
1442 | /* Create a dummy->actual mapping. */ | |
1443 | sm = gfc_getmem (sizeof (*sm)); | |
1444 | sm->next = mapping->syms; | |
1445 | sm->old = sym; | |
1446 | sm->new = new_symtree; | |
1447 | mapping->syms = sm; | |
1448 | ||
1449 | /* Stabilize the argument's value. */ | |
1450 | se->expr = gfc_evaluate_now (se->expr, &se->pre); | |
1451 | ||
1452 | if (sym->ts.type == BT_CHARACTER) | |
1453 | { | |
1454 | /* Create a copy of the dummy argument's length. */ | |
1455 | new_sym->ts.cl = gfc_get_interface_mapping_charlen (mapping, sym->ts.cl); | |
1456 | ||
1457 | /* If the length is specified as "*", record the length that | |
1458 | the caller is passing. We should use the callee's length | |
1459 | in all other cases. */ | |
1460 | if (!new_sym->ts.cl->length) | |
1461 | { | |
1462 | se->string_length = gfc_evaluate_now (se->string_length, &se->pre); | |
1463 | new_sym->ts.cl->backend_decl = se->string_length; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | /* Use the passed value as-is if the argument is a function. */ | |
1468 | if (sym->attr.flavor == FL_PROCEDURE) | |
1469 | value = se->expr; | |
1470 | ||
1471 | /* If the argument is either a string or a pointer to a string, | |
1472 | convert it to a boundless character type. */ | |
1473 | else if (!sym->attr.dimension && sym->ts.type == BT_CHARACTER) | |
1474 | { | |
1475 | tmp = gfc_get_character_type_len (sym->ts.kind, NULL); | |
1476 | tmp = build_pointer_type (tmp); | |
1477 | if (sym->attr.pointer) | |
e042ae37 | 1478 | value = build_fold_indirect_ref (se->expr); |
1479 | else | |
1480 | value = se->expr; | |
1481 | value = fold_convert (tmp, value); | |
08569428 | 1482 | } |
1483 | ||
76845580 | 1484 | /* If the argument is a scalar, a pointer to an array or an allocatable, |
1485 | dereference it. */ | |
1486 | else if (!sym->attr.dimension || sym->attr.pointer || sym->attr.allocatable) | |
4fa2c167 | 1487 | value = build_fold_indirect_ref (se->expr); |
e3071e62 | 1488 | |
1489 | /* For character(*), use the actual argument's descriptor. */ | |
1490 | else if (sym->ts.type == BT_CHARACTER && !new_sym->ts.cl->length) | |
1491 | value = build_fold_indirect_ref (se->expr); | |
08569428 | 1492 | |
1493 | /* If the argument is an array descriptor, use it to determine | |
1494 | information about the actual argument's shape. */ | |
1495 | else if (POINTER_TYPE_P (TREE_TYPE (se->expr)) | |
1496 | && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se->expr)))) | |
1497 | { | |
1498 | /* Get the actual argument's descriptor. */ | |
4fa2c167 | 1499 | desc = build_fold_indirect_ref (se->expr); |
08569428 | 1500 | |
1501 | /* Create the replacement variable. */ | |
1502 | tmp = gfc_conv_descriptor_data_get (desc); | |
3d8dea5a | 1503 | value = gfc_get_interface_mapping_array (&se->pre, sym, |
1504 | PACKED_NO, tmp); | |
08569428 | 1505 | |
1506 | /* Use DESC to work out the upper bounds, strides and offset. */ | |
1507 | gfc_set_interface_mapping_bounds (&se->pre, TREE_TYPE (value), desc); | |
1508 | } | |
1509 | else | |
1510 | /* Otherwise we have a packed array. */ | |
3d8dea5a | 1511 | value = gfc_get_interface_mapping_array (&se->pre, sym, |
1512 | PACKED_FULL, se->expr); | |
08569428 | 1513 | |
1514 | new_sym->backend_decl = value; | |
1515 | } | |
1516 | ||
1517 | ||
1518 | /* Called once all dummy argument mappings have been added to MAPPING, | |
1519 | but before the mapping is used to evaluate expressions. Pre-evaluate | |
1520 | the length of each argument, adding any initialization code to PRE and | |
1521 | any finalization code to POST. */ | |
1522 | ||
f45a476e | 1523 | void |
08569428 | 1524 | gfc_finish_interface_mapping (gfc_interface_mapping * mapping, |
1525 | stmtblock_t * pre, stmtblock_t * post) | |
1526 | { | |
1527 | gfc_interface_sym_mapping *sym; | |
1528 | gfc_expr *expr; | |
1529 | gfc_se se; | |
1530 | ||
1531 | for (sym = mapping->syms; sym; sym = sym->next) | |
1532 | if (sym->new->n.sym->ts.type == BT_CHARACTER | |
1533 | && !sym->new->n.sym->ts.cl->backend_decl) | |
1534 | { | |
1535 | expr = sym->new->n.sym->ts.cl->length; | |
1536 | gfc_apply_interface_mapping_to_expr (mapping, expr); | |
1537 | gfc_init_se (&se, NULL); | |
1538 | gfc_conv_expr (&se, expr); | |
1539 | ||
1540 | se.expr = gfc_evaluate_now (se.expr, &se.pre); | |
1541 | gfc_add_block_to_block (pre, &se.pre); | |
1542 | gfc_add_block_to_block (post, &se.post); | |
1543 | ||
1544 | sym->new->n.sym->ts.cl->backend_decl = se.expr; | |
1545 | } | |
1546 | } | |
1547 | ||
1548 | ||
1549 | /* Like gfc_apply_interface_mapping_to_expr, but applied to | |
1550 | constructor C. */ | |
1551 | ||
1552 | static void | |
1553 | gfc_apply_interface_mapping_to_cons (gfc_interface_mapping * mapping, | |
1554 | gfc_constructor * c) | |
1555 | { | |
1556 | for (; c; c = c->next) | |
1557 | { | |
1558 | gfc_apply_interface_mapping_to_expr (mapping, c->expr); | |
1559 | if (c->iterator) | |
1560 | { | |
1561 | gfc_apply_interface_mapping_to_expr (mapping, c->iterator->start); | |
1562 | gfc_apply_interface_mapping_to_expr (mapping, c->iterator->end); | |
1563 | gfc_apply_interface_mapping_to_expr (mapping, c->iterator->step); | |
1564 | } | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | ||
1569 | /* Like gfc_apply_interface_mapping_to_expr, but applied to | |
1570 | reference REF. */ | |
1571 | ||
1572 | static void | |
1573 | gfc_apply_interface_mapping_to_ref (gfc_interface_mapping * mapping, | |
1574 | gfc_ref * ref) | |
1575 | { | |
1576 | int n; | |
1577 | ||
1578 | for (; ref; ref = ref->next) | |
1579 | switch (ref->type) | |
1580 | { | |
1581 | case REF_ARRAY: | |
1582 | for (n = 0; n < ref->u.ar.dimen; n++) | |
1583 | { | |
1584 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.start[n]); | |
1585 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.end[n]); | |
1586 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.stride[n]); | |
1587 | } | |
1588 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.offset); | |
1589 | break; | |
1590 | ||
1591 | case REF_COMPONENT: | |
1592 | break; | |
1593 | ||
1594 | case REF_SUBSTRING: | |
1595 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.start); | |
1596 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.end); | |
1597 | break; | |
1598 | } | |
1599 | } | |
1600 | ||
1601 | ||
1602 | /* EXPR is a copy of an expression that appeared in the interface | |
1603 | associated with MAPPING. Walk it recursively looking for references to | |
1604 | dummy arguments that MAPPING maps to actual arguments. Replace each such | |
1605 | reference with a reference to the associated actual argument. */ | |
1606 | ||
7f7ca309 | 1607 | static int |
08569428 | 1608 | gfc_apply_interface_mapping_to_expr (gfc_interface_mapping * mapping, |
1609 | gfc_expr * expr) | |
1610 | { | |
1611 | gfc_interface_sym_mapping *sym; | |
1612 | gfc_actual_arglist *actual; | |
7f7ca309 | 1613 | int seen_result = 0; |
08569428 | 1614 | |
1615 | if (!expr) | |
7f7ca309 | 1616 | return 0; |
08569428 | 1617 | |
1618 | /* Copying an expression does not copy its length, so do that here. */ | |
1619 | if (expr->ts.type == BT_CHARACTER && expr->ts.cl) | |
1620 | { | |
1621 | expr->ts.cl = gfc_get_interface_mapping_charlen (mapping, expr->ts.cl); | |
1622 | gfc_apply_interface_mapping_to_expr (mapping, expr->ts.cl->length); | |
1623 | } | |
1624 | ||
1625 | /* Apply the mapping to any references. */ | |
1626 | gfc_apply_interface_mapping_to_ref (mapping, expr->ref); | |
1627 | ||
1628 | /* ...and to the expression's symbol, if it has one. */ | |
1629 | if (expr->symtree) | |
1630 | for (sym = mapping->syms; sym; sym = sym->next) | |
1631 | if (sym->old == expr->symtree->n.sym) | |
1632 | expr->symtree = sym->new; | |
1633 | ||
1634 | /* ...and to subexpressions in expr->value. */ | |
1635 | switch (expr->expr_type) | |
1636 | { | |
1637 | case EXPR_VARIABLE: | |
7f7ca309 | 1638 | if (expr->symtree->n.sym->attr.result) |
1639 | seen_result = 1; | |
08569428 | 1640 | case EXPR_CONSTANT: |
1641 | case EXPR_NULL: | |
1642 | case EXPR_SUBSTRING: | |
1643 | break; | |
1644 | ||
1645 | case EXPR_OP: | |
1646 | gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op1); | |
1647 | gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op2); | |
1648 | break; | |
1649 | ||
1650 | case EXPR_FUNCTION: | |
7f7ca309 | 1651 | if (expr->value.function.actual->expr->expr_type == EXPR_VARIABLE |
1652 | && gfc_apply_interface_mapping_to_expr (mapping, | |
1653 | expr->value.function.actual->expr) | |
1654 | && expr->value.function.esym == NULL | |
1655 | && expr->value.function.isym != NULL | |
1656 | && expr->value.function.isym->generic_id == GFC_ISYM_LEN) | |
1657 | { | |
1658 | gfc_expr *new_expr; | |
1659 | new_expr = gfc_copy_expr (expr->value.function.actual->expr->ts.cl->length); | |
1660 | *expr = *new_expr; | |
1661 | gfc_free (new_expr); | |
1662 | gfc_apply_interface_mapping_to_expr (mapping, expr); | |
1663 | break; | |
1664 | } | |
1665 | ||
08569428 | 1666 | for (sym = mapping->syms; sym; sym = sym->next) |
1667 | if (sym->old == expr->value.function.esym) | |
1668 | expr->value.function.esym = sym->new->n.sym; | |
1669 | ||
1670 | for (actual = expr->value.function.actual; actual; actual = actual->next) | |
1671 | gfc_apply_interface_mapping_to_expr (mapping, actual->expr); | |
1672 | break; | |
1673 | ||
1674 | case EXPR_ARRAY: | |
1675 | case EXPR_STRUCTURE: | |
1676 | gfc_apply_interface_mapping_to_cons (mapping, expr->value.constructor); | |
1677 | break; | |
1678 | } | |
7f7ca309 | 1679 | return seen_result; |
08569428 | 1680 | } |
1681 | ||
1682 | ||
1683 | /* Evaluate interface expression EXPR using MAPPING. Store the result | |
1684 | in SE. */ | |
1685 | ||
f45a476e | 1686 | void |
08569428 | 1687 | gfc_apply_interface_mapping (gfc_interface_mapping * mapping, |
1688 | gfc_se * se, gfc_expr * expr) | |
1689 | { | |
1690 | expr = gfc_copy_expr (expr); | |
1691 | gfc_apply_interface_mapping_to_expr (mapping, expr); | |
1692 | gfc_conv_expr (se, expr); | |
1693 | se->expr = gfc_evaluate_now (se->expr, &se->pre); | |
1694 | gfc_free_expr (expr); | |
1695 | } | |
1696 | ||
858f9894 | 1697 | /* Returns a reference to a temporary array into which a component of |
1698 | an actual argument derived type array is copied and then returned | |
1699 | after the function call. | |
1700 | TODO Get rid of this kludge, when array descriptors are capable of | |
2ecf364f | 1701 | handling arrays with a bigger stride in bytes than size. */ |
858f9894 | 1702 | |
2ecf364f | 1703 | void |
35d9c496 | 1704 | gfc_conv_aliased_arg (gfc_se * parmse, gfc_expr * expr, |
1705 | int g77, sym_intent intent) | |
858f9894 | 1706 | { |
1707 | gfc_se lse; | |
1708 | gfc_se rse; | |
1709 | gfc_ss *lss; | |
1710 | gfc_ss *rss; | |
1711 | gfc_loopinfo loop; | |
1712 | gfc_loopinfo loop2; | |
1713 | gfc_ss_info *info; | |
1714 | tree offset; | |
1715 | tree tmp_index; | |
1716 | tree tmp; | |
1717 | tree base_type; | |
1718 | stmtblock_t body; | |
1719 | int n; | |
1720 | ||
1721 | gcc_assert (expr->expr_type == EXPR_VARIABLE); | |
1722 | ||
1723 | gfc_init_se (&lse, NULL); | |
1724 | gfc_init_se (&rse, NULL); | |
1725 | ||
1726 | /* Walk the argument expression. */ | |
1727 | rss = gfc_walk_expr (expr); | |
1728 | ||
1729 | gcc_assert (rss != gfc_ss_terminator); | |
1730 | ||
1731 | /* Initialize the scalarizer. */ | |
1732 | gfc_init_loopinfo (&loop); | |
1733 | gfc_add_ss_to_loop (&loop, rss); | |
1734 | ||
1735 | /* Calculate the bounds of the scalarization. */ | |
1736 | gfc_conv_ss_startstride (&loop); | |
1737 | ||
1738 | /* Build an ss for the temporary. */ | |
1739 | base_type = gfc_typenode_for_spec (&expr->ts); | |
1740 | if (GFC_ARRAY_TYPE_P (base_type) | |
1741 | || GFC_DESCRIPTOR_TYPE_P (base_type)) | |
1742 | base_type = gfc_get_element_type (base_type); | |
1743 | ||
1744 | loop.temp_ss = gfc_get_ss ();; | |
1745 | loop.temp_ss->type = GFC_SS_TEMP; | |
1746 | loop.temp_ss->data.temp.type = base_type; | |
1747 | ||
1748 | if (expr->ts.type == BT_CHARACTER) | |
35d9c496 | 1749 | { |
1750 | gfc_ref *char_ref = expr->ref; | |
1751 | ||
2ecf364f | 1752 | for (; char_ref; char_ref = char_ref->next) |
35d9c496 | 1753 | if (char_ref->type == REF_SUBSTRING) |
1754 | { | |
1755 | gfc_se tmp_se; | |
1756 | ||
1757 | expr->ts.cl = gfc_get_charlen (); | |
1758 | expr->ts.cl->next = char_ref->u.ss.length->next; | |
1759 | char_ref->u.ss.length->next = expr->ts.cl; | |
1760 | ||
1761 | gfc_init_se (&tmp_se, NULL); | |
1762 | gfc_conv_expr_type (&tmp_se, char_ref->u.ss.end, | |
1763 | gfc_array_index_type); | |
1764 | tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1765 | tmp_se.expr, gfc_index_one_node); | |
1766 | tmp = gfc_evaluate_now (tmp, &parmse->pre); | |
1767 | gfc_init_se (&tmp_se, NULL); | |
1768 | gfc_conv_expr_type (&tmp_se, char_ref->u.ss.start, | |
1769 | gfc_array_index_type); | |
1770 | tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1771 | tmp, tmp_se.expr); | |
1772 | expr->ts.cl->backend_decl = tmp; | |
1773 | ||
1774 | break; | |
1775 | } | |
1776 | loop.temp_ss->data.temp.type | |
1777 | = gfc_typenode_for_spec (&expr->ts); | |
1778 | loop.temp_ss->string_length = expr->ts.cl->backend_decl; | |
1779 | } | |
858f9894 | 1780 | |
1781 | loop.temp_ss->data.temp.dimen = loop.dimen; | |
1782 | loop.temp_ss->next = gfc_ss_terminator; | |
1783 | ||
1784 | /* Associate the SS with the loop. */ | |
1785 | gfc_add_ss_to_loop (&loop, loop.temp_ss); | |
1786 | ||
1787 | /* Setup the scalarizing loops. */ | |
1788 | gfc_conv_loop_setup (&loop); | |
1789 | ||
1790 | /* Pass the temporary descriptor back to the caller. */ | |
1791 | info = &loop.temp_ss->data.info; | |
1792 | parmse->expr = info->descriptor; | |
1793 | ||
1794 | /* Setup the gfc_se structures. */ | |
1795 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
1796 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
1797 | ||
1798 | rse.ss = rss; | |
1799 | lse.ss = loop.temp_ss; | |
1800 | gfc_mark_ss_chain_used (rss, 1); | |
1801 | gfc_mark_ss_chain_used (loop.temp_ss, 1); | |
1802 | ||
1803 | /* Start the scalarized loop body. */ | |
1804 | gfc_start_scalarized_body (&loop, &body); | |
1805 | ||
1806 | /* Translate the expression. */ | |
1807 | gfc_conv_expr (&rse, expr); | |
1808 | ||
1809 | gfc_conv_tmp_array_ref (&lse); | |
1810 | gfc_advance_se_ss_chain (&lse); | |
1811 | ||
35d9c496 | 1812 | if (intent != INTENT_OUT) |
1813 | { | |
2294b616 | 1814 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, true, false); |
35d9c496 | 1815 | gfc_add_expr_to_block (&body, tmp); |
1816 | gcc_assert (rse.ss == gfc_ss_terminator); | |
1817 | gfc_trans_scalarizing_loops (&loop, &body); | |
1818 | } | |
e8325fb3 | 1819 | else |
1820 | { | |
54ad1b4d | 1821 | /* Make sure that the temporary declaration survives by merging |
1822 | all the loop declarations into the current context. */ | |
1823 | for (n = 0; n < loop.dimen; n++) | |
1824 | { | |
1825 | gfc_merge_block_scope (&body); | |
1826 | body = loop.code[loop.order[n]]; | |
1827 | } | |
1828 | gfc_merge_block_scope (&body); | |
e8325fb3 | 1829 | } |
858f9894 | 1830 | |
1831 | /* Add the post block after the second loop, so that any | |
1832 | freeing of allocated memory is done at the right time. */ | |
1833 | gfc_add_block_to_block (&parmse->pre, &loop.pre); | |
1834 | ||
1835 | /**********Copy the temporary back again.*********/ | |
1836 | ||
1837 | gfc_init_se (&lse, NULL); | |
1838 | gfc_init_se (&rse, NULL); | |
1839 | ||
1840 | /* Walk the argument expression. */ | |
1841 | lss = gfc_walk_expr (expr); | |
1842 | rse.ss = loop.temp_ss; | |
1843 | lse.ss = lss; | |
1844 | ||
1845 | /* Initialize the scalarizer. */ | |
1846 | gfc_init_loopinfo (&loop2); | |
1847 | gfc_add_ss_to_loop (&loop2, lss); | |
1848 | ||
1849 | /* Calculate the bounds of the scalarization. */ | |
1850 | gfc_conv_ss_startstride (&loop2); | |
1851 | ||
1852 | /* Setup the scalarizing loops. */ | |
1853 | gfc_conv_loop_setup (&loop2); | |
1854 | ||
1855 | gfc_copy_loopinfo_to_se (&lse, &loop2); | |
1856 | gfc_copy_loopinfo_to_se (&rse, &loop2); | |
1857 | ||
1858 | gfc_mark_ss_chain_used (lss, 1); | |
1859 | gfc_mark_ss_chain_used (loop.temp_ss, 1); | |
1860 | ||
1861 | /* Declare the variable to hold the temporary offset and start the | |
1862 | scalarized loop body. */ | |
1863 | offset = gfc_create_var (gfc_array_index_type, NULL); | |
1864 | gfc_start_scalarized_body (&loop2, &body); | |
1865 | ||
1866 | /* Build the offsets for the temporary from the loop variables. The | |
1867 | temporary array has lbounds of zero and strides of one in all | |
1868 | dimensions, so this is very simple. The offset is only computed | |
1869 | outside the innermost loop, so the overall transfer could be | |
179eba08 | 1870 | optimized further. */ |
858f9894 | 1871 | info = &rse.ss->data.info; |
1872 | ||
1873 | tmp_index = gfc_index_zero_node; | |
1874 | for (n = info->dimen - 1; n > 0; n--) | |
1875 | { | |
1876 | tree tmp_str; | |
1877 | tmp = rse.loop->loopvar[n]; | |
1878 | tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1879 | tmp, rse.loop->from[n]); | |
1880 | tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1881 | tmp, tmp_index); | |
1882 | ||
1883 | tmp_str = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1884 | rse.loop->to[n-1], rse.loop->from[n-1]); | |
1885 | tmp_str = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1886 | tmp_str, gfc_index_one_node); | |
1887 | ||
1888 | tmp_index = fold_build2 (MULT_EXPR, gfc_array_index_type, | |
1889 | tmp, tmp_str); | |
1890 | } | |
1891 | ||
1892 | tmp_index = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1893 | tmp_index, rse.loop->from[0]); | |
1894 | gfc_add_modify_expr (&rse.loop->code[0], offset, tmp_index); | |
1895 | ||
1896 | tmp_index = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1897 | rse.loop->loopvar[0], offset); | |
1898 | ||
1899 | /* Now use the offset for the reference. */ | |
1900 | tmp = build_fold_indirect_ref (info->data); | |
1901 | rse.expr = gfc_build_array_ref (tmp, tmp_index); | |
1902 | ||
1903 | if (expr->ts.type == BT_CHARACTER) | |
1904 | rse.string_length = expr->ts.cl->backend_decl; | |
1905 | ||
1906 | gfc_conv_expr (&lse, expr); | |
1907 | ||
1908 | gcc_assert (lse.ss == gfc_ss_terminator); | |
1909 | ||
2294b616 | 1910 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, false, false); |
858f9894 | 1911 | gfc_add_expr_to_block (&body, tmp); |
1912 | ||
1913 | /* Generate the copying loops. */ | |
1914 | gfc_trans_scalarizing_loops (&loop2, &body); | |
1915 | ||
1916 | /* Wrap the whole thing up by adding the second loop to the post-block | |
35d9c496 | 1917 | and following it by the post-block of the first loop. In this way, |
858f9894 | 1918 | if the temporary needs freeing, it is done after use! */ |
35d9c496 | 1919 | if (intent != INTENT_IN) |
1920 | { | |
1921 | gfc_add_block_to_block (&parmse->post, &loop2.pre); | |
1922 | gfc_add_block_to_block (&parmse->post, &loop2.post); | |
1923 | } | |
858f9894 | 1924 | |
1925 | gfc_add_block_to_block (&parmse->post, &loop.post); | |
1926 | ||
1927 | gfc_cleanup_loop (&loop); | |
1928 | gfc_cleanup_loop (&loop2); | |
1929 | ||
1930 | /* Pass the string length to the argument expression. */ | |
1931 | if (expr->ts.type == BT_CHARACTER) | |
1932 | parmse->string_length = expr->ts.cl->backend_decl; | |
1933 | ||
1934 | /* We want either the address for the data or the address of the descriptor, | |
1935 | depending on the mode of passing array arguments. */ | |
1936 | if (g77) | |
1937 | parmse->expr = gfc_conv_descriptor_data_get (parmse->expr); | |
1938 | else | |
1939 | parmse->expr = build_fold_addr_expr (parmse->expr); | |
1940 | ||
1941 | return; | |
1942 | } | |
1943 | ||
508cef6d | 1944 | /* Is true if an array reference is followed by a component or substring |
1945 | reference. */ | |
858f9894 | 1946 | |
2ecf364f | 1947 | bool |
858f9894 | 1948 | is_aliased_array (gfc_expr * e) |
1949 | { | |
1950 | gfc_ref * ref; | |
1951 | bool seen_array; | |
1952 | ||
1953 | seen_array = false; | |
1954 | for (ref = e->ref; ref; ref = ref->next) | |
1955 | { | |
508cef6d | 1956 | if (ref->type == REF_ARRAY |
1957 | && ref->u.ar.type != AR_ELEMENT) | |
858f9894 | 1958 | seen_array = true; |
1959 | ||
508cef6d | 1960 | if (seen_array |
35d9c496 | 1961 | && ref->type != REF_ARRAY) |
858f9894 | 1962 | return seen_array; |
1963 | } | |
1964 | return false; | |
1965 | } | |
08569428 | 1966 | |
8d7cdc4d | 1967 | /* Generate the code for argument list functions. */ |
1968 | ||
1969 | static void | |
1970 | conv_arglist_function (gfc_se *se, gfc_expr *expr, const char *name) | |
1971 | { | |
8d7cdc4d | 1972 | /* Pass by value for g77 %VAL(arg), pass the address |
1973 | indirectly for %LOC, else by reference. Thus %REF | |
1974 | is a "do-nothing" and %LOC is the same as an F95 | |
1975 | pointer. */ | |
1976 | if (strncmp (name, "%VAL", 4) == 0) | |
b8128c7b | 1977 | gfc_conv_expr (se, expr); |
8d7cdc4d | 1978 | else if (strncmp (name, "%LOC", 4) == 0) |
1979 | { | |
1980 | gfc_conv_expr_reference (se, expr); | |
1981 | se->expr = gfc_build_addr_expr (NULL, se->expr); | |
1982 | } | |
1983 | else if (strncmp (name, "%REF", 4) == 0) | |
1984 | gfc_conv_expr_reference (se, expr); | |
1985 | else | |
1986 | gfc_error ("Unknown argument list function at %L", &expr->where); | |
1987 | } | |
1988 | ||
1989 | ||
4ee9c684 | 1990 | /* Generate code for a procedure call. Note can return se->post != NULL. |
079d21d5 | 1991 | If se->direct_byref is set then se->expr contains the return parameter. |
89d91d02 | 1992 | Return nonzero, if the call has alternate specifiers. */ |
4ee9c684 | 1993 | |
079d21d5 | 1994 | int |
4ee9c684 | 1995 | gfc_conv_function_call (gfc_se * se, gfc_symbol * sym, |
4e8e57b0 | 1996 | gfc_actual_arglist * arg, tree append_args) |
4ee9c684 | 1997 | { |
08569428 | 1998 | gfc_interface_mapping mapping; |
4ee9c684 | 1999 | tree arglist; |
08569428 | 2000 | tree retargs; |
4ee9c684 | 2001 | tree tmp; |
2002 | tree fntype; | |
2003 | gfc_se parmse; | |
2004 | gfc_ss *argss; | |
2005 | gfc_ss_info *info; | |
2006 | int byref; | |
2294b616 | 2007 | int parm_kind; |
4ee9c684 | 2008 | tree type; |
2009 | tree var; | |
2010 | tree len; | |
2011 | tree stringargs; | |
2012 | gfc_formal_arglist *formal; | |
079d21d5 | 2013 | int has_alternate_specifier = 0; |
08569428 | 2014 | bool need_interface_mapping; |
d4ef6f9d | 2015 | bool callee_alloc; |
08569428 | 2016 | gfc_typespec ts; |
2017 | gfc_charlen cl; | |
bd24f178 | 2018 | gfc_expr *e; |
2019 | gfc_symbol *fsym; | |
10b07432 | 2020 | stmtblock_t post; |
2294b616 | 2021 | enum {MISSING = 0, ELEMENTAL, SCALAR, SCALAR_POINTER, ARRAY}; |
4ee9c684 | 2022 | |
2023 | arglist = NULL_TREE; | |
08569428 | 2024 | retargs = NULL_TREE; |
4ee9c684 | 2025 | stringargs = NULL_TREE; |
2026 | var = NULL_TREE; | |
2027 | len = NULL_TREE; | |
2028 | ||
2029 | if (se->ss != NULL) | |
2030 | { | |
2031 | if (!sym->attr.elemental) | |
2032 | { | |
22d678e8 | 2033 | gcc_assert (se->ss->type == GFC_SS_FUNCTION); |
4ee9c684 | 2034 | if (se->ss->useflags) |
2035 | { | |
22d678e8 | 2036 | gcc_assert (gfc_return_by_reference (sym) |
4ee9c684 | 2037 | && sym->result->attr.dimension); |
22d678e8 | 2038 | gcc_assert (se->loop != NULL); |
4ee9c684 | 2039 | |
2040 | /* Access the previously obtained result. */ | |
2041 | gfc_conv_tmp_array_ref (se); | |
2042 | gfc_advance_se_ss_chain (se); | |
079d21d5 | 2043 | return 0; |
4ee9c684 | 2044 | } |
2045 | } | |
2046 | info = &se->ss->data.info; | |
2047 | } | |
2048 | else | |
2049 | info = NULL; | |
2050 | ||
10b07432 | 2051 | gfc_init_block (&post); |
08569428 | 2052 | gfc_init_interface_mapping (&mapping); |
f45a476e | 2053 | need_interface_mapping = ((sym->ts.type == BT_CHARACTER |
5e8cd291 | 2054 | && sym->ts.cl->length |
2055 | && sym->ts.cl->length->expr_type | |
2056 | != EXPR_CONSTANT) | |
2057 | || sym->attr.dimension); | |
4ee9c684 | 2058 | formal = sym->formal; |
2059 | /* Evaluate the arguments. */ | |
2060 | for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL) | |
2061 | { | |
bd24f178 | 2062 | e = arg->expr; |
2063 | fsym = formal ? formal->sym : NULL; | |
2294b616 | 2064 | parm_kind = MISSING; |
bd24f178 | 2065 | if (e == NULL) |
4ee9c684 | 2066 | { |
2067 | ||
2068 | if (se->ignore_optional) | |
2069 | { | |
2070 | /* Some intrinsics have already been resolved to the correct | |
2071 | parameters. */ | |
2072 | continue; | |
2073 | } | |
2074 | else if (arg->label) | |
2075 | { | |
2076 | has_alternate_specifier = 1; | |
2077 | continue; | |
2078 | } | |
2079 | else | |
2080 | { | |
2081 | /* Pass a NULL pointer for an absent arg. */ | |
2082 | gfc_init_se (&parmse, NULL); | |
2083 | parmse.expr = null_pointer_node; | |
0fe9e56f | 2084 | if (arg->missing_arg_type == BT_CHARACTER) |
7d3075f6 | 2085 | parmse.string_length = build_int_cst (gfc_charlen_type_node, 0); |
4ee9c684 | 2086 | } |
2087 | } | |
2088 | else if (se->ss && se->ss->useflags) | |
2089 | { | |
2090 | /* An elemental function inside a scalarized loop. */ | |
2091 | gfc_init_se (&parmse, se); | |
bd24f178 | 2092 | gfc_conv_expr_reference (&parmse, e); |
2294b616 | 2093 | parm_kind = ELEMENTAL; |
4ee9c684 | 2094 | } |
2095 | else | |
2096 | { | |
2097 | /* A scalar or transformational function. */ | |
2098 | gfc_init_se (&parmse, NULL); | |
bd24f178 | 2099 | argss = gfc_walk_expr (e); |
4ee9c684 | 2100 | |
2101 | if (argss == gfc_ss_terminator) | |
8f6339b6 | 2102 | { |
2294b616 | 2103 | parm_kind = SCALAR; |
8f6339b6 | 2104 | if (fsym && fsym->attr.value) |
2105 | { | |
2106 | gfc_conv_expr (&parmse, e); | |
2107 | } | |
8d7cdc4d | 2108 | else if (arg->name && arg->name[0] == '%') |
2109 | /* Argument list functions %VAL, %LOC and %REF are signalled | |
2110 | through arg->name. */ | |
2111 | conv_arglist_function (&parmse, arg->expr, arg->name); | |
7f7ca309 | 2112 | else if ((e->expr_type == EXPR_FUNCTION) |
2113 | && e->symtree->n.sym->attr.pointer | |
2114 | && fsym && fsym->attr.target) | |
2115 | { | |
2116 | gfc_conv_expr (&parmse, e); | |
2117 | parmse.expr = build_fold_addr_expr (parmse.expr); | |
2118 | } | |
8f6339b6 | 2119 | else |
2120 | { | |
2121 | gfc_conv_expr_reference (&parmse, e); | |
2122 | if (fsym && fsym->attr.pointer | |
7f7ca309 | 2123 | && fsym->attr.flavor != FL_PROCEDURE |
2124 | && e->expr_type != EXPR_NULL) | |
8f6339b6 | 2125 | { |
2126 | /* Scalar pointer dummy args require an extra level of | |
2127 | indirection. The null pointer already contains | |
2128 | this level of indirection. */ | |
2129 | parm_kind = SCALAR_POINTER; | |
2130 | parmse.expr = build_fold_addr_expr (parmse.expr); | |
2131 | } | |
2132 | } | |
2133 | } | |
4ee9c684 | 2134 | else |
2135 | { | |
7d19e94d | 2136 | /* If the procedure requires an explicit interface, the actual |
2137 | argument is passed according to the corresponding formal | |
2138 | argument. If the corresponding formal argument is a POINTER, | |
2139 | ALLOCATABLE or assumed shape, we do not use g77's calling | |
2140 | convention, and pass the address of the array descriptor | |
2141 | instead. Otherwise we use g77's calling convention. */ | |
4ee9c684 | 2142 | int f; |
bd24f178 | 2143 | f = (fsym != NULL) |
2144 | && !(fsym->attr.pointer || fsym->attr.allocatable) | |
2145 | && fsym->as->type != AS_ASSUMED_SHAPE; | |
4ee9c684 | 2146 | f = f || !sym->attr.always_explicit; |
35d9c496 | 2147 | |
bd24f178 | 2148 | if (e->expr_type == EXPR_VARIABLE |
2149 | && is_aliased_array (e)) | |
858f9894 | 2150 | /* The actual argument is a component reference to an |
2151 | array of derived types. In this case, the argument | |
2152 | is converted to a temporary, which is passed and then | |
2153 | written back after the procedure call. */ | |
b8a51d79 | 2154 | gfc_conv_aliased_arg (&parmse, e, f, |
2155 | fsym ? fsym->attr.intent : INTENT_INOUT); | |
858f9894 | 2156 | else |
bd24f178 | 2157 | gfc_conv_array_parameter (&parmse, e, argss, f); |
ab19f982 | 2158 | |
2159 | /* If an ALLOCATABLE dummy argument has INTENT(OUT) and is | |
2160 | allocated on entry, it must be deallocated. */ | |
bd24f178 | 2161 | if (fsym && fsym->attr.allocatable |
2162 | && fsym->attr.intent == INTENT_OUT) | |
ab19f982 | 2163 | { |
76b504f5 | 2164 | tmp = build_fold_indirect_ref (parmse.expr); |
f135d1ce | 2165 | tmp = gfc_trans_dealloc_allocated (tmp); |
ab19f982 | 2166 | gfc_add_expr_to_block (&se->pre, tmp); |
2167 | } | |
2168 | ||
4ee9c684 | 2169 | } |
2170 | } | |
2171 | ||
d45fced7 | 2172 | if (fsym) |
2173 | { | |
2174 | if (e) | |
2175 | { | |
2176 | /* If an optional argument is itself an optional dummy | |
2177 | argument, check its presence and substitute a null | |
2178 | if absent. */ | |
2179 | if (e->expr_type == EXPR_VARIABLE | |
2180 | && e->symtree->n.sym->attr.optional | |
2181 | && fsym->attr.optional) | |
2182 | gfc_conv_missing_dummy (&parmse, e, fsym->ts); | |
2183 | ||
2184 | /* If an INTENT(OUT) dummy of derived type has a default | |
2185 | initializer, it must be (re)initialized here. */ | |
2186 | if (fsym->attr.intent == INTENT_OUT | |
2187 | && fsym->ts.type == BT_DERIVED | |
2188 | && fsym->value) | |
2189 | { | |
2190 | gcc_assert (!fsym->attr.allocatable); | |
b9cd8c56 | 2191 | tmp = gfc_trans_assignment (e, fsym->value, false); |
d45fced7 | 2192 | gfc_add_expr_to_block (&se->pre, tmp); |
2193 | } | |
2194 | ||
2195 | /* Obtain the character length of an assumed character | |
2196 | length procedure from the typespec. */ | |
2197 | if (fsym->ts.type == BT_CHARACTER | |
2198 | && parmse.string_length == NULL_TREE | |
2199 | && e->ts.type == BT_PROCEDURE | |
2200 | && e->symtree->n.sym->ts.type == BT_CHARACTER | |
2201 | && e->symtree->n.sym->ts.cl->length != NULL) | |
2202 | { | |
2203 | gfc_conv_const_charlen (e->symtree->n.sym->ts.cl); | |
2204 | parmse.string_length | |
2205 | = e->symtree->n.sym->ts.cl->backend_decl; | |
2206 | } | |
2207 | } | |
bd24f178 | 2208 | |
d45fced7 | 2209 | if (need_interface_mapping) |
2210 | gfc_add_interface_mapping (&mapping, fsym, &parmse); | |
2211 | } | |
08569428 | 2212 | |
4ee9c684 | 2213 | gfc_add_block_to_block (&se->pre, &parmse.pre); |
10b07432 | 2214 | gfc_add_block_to_block (&post, &parmse.post); |
4ee9c684 | 2215 | |
2294b616 | 2216 | /* Allocated allocatable components of derived types must be |
2217 | deallocated for INTENT(OUT) dummy arguments and non-variable | |
2218 | scalars. Non-variable arrays are dealt with in trans-array.c | |
2219 | (gfc_conv_array_parameter). */ | |
2220 | if (e && e->ts.type == BT_DERIVED | |
2221 | && e->ts.derived->attr.alloc_comp | |
2222 | && ((formal && formal->sym->attr.intent == INTENT_OUT) | |
2223 | || | |
2224 | (e->expr_type != EXPR_VARIABLE && !e->rank))) | |
2225 | { | |
2226 | int parm_rank; | |
2227 | tmp = build_fold_indirect_ref (parmse.expr); | |
2228 | parm_rank = e->rank; | |
2229 | switch (parm_kind) | |
2230 | { | |
2231 | case (ELEMENTAL): | |
2232 | case (SCALAR): | |
2233 | parm_rank = 0; | |
2234 | break; | |
2235 | ||
2236 | case (SCALAR_POINTER): | |
2237 | tmp = build_fold_indirect_ref (tmp); | |
2238 | break; | |
2239 | case (ARRAY): | |
2240 | tmp = parmse.expr; | |
2241 | break; | |
2242 | } | |
2243 | ||
2244 | tmp = gfc_deallocate_alloc_comp (e->ts.derived, tmp, parm_rank); | |
2245 | if (e->expr_type == EXPR_VARIABLE && e->symtree->n.sym->attr.optional) | |
2246 | tmp = build3_v (COND_EXPR, gfc_conv_expr_present (e->symtree->n.sym), | |
2247 | tmp, build_empty_stmt ()); | |
2248 | ||
2249 | if (e->expr_type != EXPR_VARIABLE) | |
2250 | /* Don't deallocate non-variables until they have been used. */ | |
2251 | gfc_add_expr_to_block (&se->post, tmp); | |
2252 | else | |
2253 | { | |
2254 | gcc_assert (formal && formal->sym->attr.intent == INTENT_OUT); | |
2255 | gfc_add_expr_to_block (&se->pre, tmp); | |
2256 | } | |
2257 | } | |
2258 | ||
7b3423b9 | 2259 | /* Character strings are passed as two parameters, a length and a |
4ee9c684 | 2260 | pointer. */ |
2261 | if (parmse.string_length != NULL_TREE) | |
2262 | stringargs = gfc_chainon_list (stringargs, parmse.string_length); | |
2263 | ||
2264 | arglist = gfc_chainon_list (arglist, parmse.expr); | |
2265 | } | |
08569428 | 2266 | gfc_finish_interface_mapping (&mapping, &se->pre, &se->post); |
2267 | ||
2268 | ts = sym->ts; | |
2269 | if (ts.type == BT_CHARACTER) | |
2270 | { | |
5e8cd291 | 2271 | if (sym->ts.cl->length == NULL) |
2272 | { | |
2273 | /* Assumed character length results are not allowed by 5.1.1.5 of the | |
2274 | standard and are trapped in resolve.c; except in the case of SPREAD | |
cce7ac71 | 2275 | (and other intrinsics?) and dummy functions. In the case of SPREAD, |
2276 | we take the character length of the first argument for the result. | |
2277 | For dummies, we have to look through the formal argument list for | |
2278 | this function and use the character length found there.*/ | |
2279 | if (!sym->attr.dummy) | |
2280 | cl.backend_decl = TREE_VALUE (stringargs); | |
2281 | else | |
2282 | { | |
2283 | formal = sym->ns->proc_name->formal; | |
2284 | for (; formal; formal = formal->next) | |
2285 | if (strcmp (formal->sym->name, sym->name) == 0) | |
2286 | cl.backend_decl = formal->sym->ts.cl->backend_decl; | |
2287 | } | |
2288 | } | |
2289 | else | |
2290 | { | |
a0ab480a | 2291 | tree tmp; |
2292 | ||
5e8cd291 | 2293 | /* Calculate the length of the returned string. */ |
2294 | gfc_init_se (&parmse, NULL); | |
2295 | if (need_interface_mapping) | |
2296 | gfc_apply_interface_mapping (&mapping, &parmse, sym->ts.cl->length); | |
2297 | else | |
2298 | gfc_conv_expr (&parmse, sym->ts.cl->length); | |
2299 | gfc_add_block_to_block (&se->pre, &parmse.pre); | |
2300 | gfc_add_block_to_block (&se->post, &parmse.post); | |
a0ab480a | 2301 | |
2302 | tmp = fold_convert (gfc_charlen_type_node, parmse.expr); | |
2303 | tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp, | |
2304 | build_int_cst (gfc_charlen_type_node, 0)); | |
2305 | cl.backend_decl = tmp; | |
5e8cd291 | 2306 | } |
08569428 | 2307 | |
2308 | /* Set up a charlen structure for it. */ | |
2309 | cl.next = NULL; | |
2310 | cl.length = NULL; | |
08569428 | 2311 | ts.cl = &cl; |
2312 | ||
2313 | len = cl.backend_decl; | |
2314 | } | |
08569428 | 2315 | |
2316 | byref = gfc_return_by_reference (sym); | |
2317 | if (byref) | |
2318 | { | |
2319 | if (se->direct_byref) | |
2320 | retargs = gfc_chainon_list (retargs, se->expr); | |
2321 | else if (sym->result->attr.dimension) | |
2322 | { | |
2323 | gcc_assert (se->loop && info); | |
2324 | ||
2325 | /* Set the type of the array. */ | |
2326 | tmp = gfc_typenode_for_spec (&ts); | |
2327 | info->dimen = se->loop->dimen; | |
2328 | ||
f45a476e | 2329 | /* Evaluate the bounds of the result, if known. */ |
2330 | gfc_set_loop_bounds_from_array_spec (&mapping, se, sym->result->as); | |
2331 | ||
d4ef6f9d | 2332 | /* Create a temporary to store the result. In case the function |
2333 | returns a pointer, the temporary will be a shallow copy and | |
2334 | mustn't be deallocated. */ | |
2335 | callee_alloc = sym->attr.allocatable || sym->attr.pointer; | |
2336 | gfc_trans_create_temp_array (&se->pre, &se->post, se->loop, info, tmp, | |
38ac16ec | 2337 | false, !sym->attr.pointer, callee_alloc); |
08569428 | 2338 | |
08569428 | 2339 | /* Pass the temporary as the first argument. */ |
2340 | tmp = info->descriptor; | |
9596685a | 2341 | tmp = build_fold_addr_expr (tmp); |
08569428 | 2342 | retargs = gfc_chainon_list (retargs, tmp); |
2343 | } | |
2344 | else if (ts.type == BT_CHARACTER) | |
2345 | { | |
2346 | /* Pass the string length. */ | |
2347 | type = gfc_get_character_type (ts.kind, ts.cl); | |
2348 | type = build_pointer_type (type); | |
2349 | ||
2350 | /* Return an address to a char[0:len-1]* temporary for | |
2351 | character pointers. */ | |
2352 | if (sym->attr.pointer || sym->attr.allocatable) | |
2353 | { | |
2354 | /* Build char[0:len-1] * pstr. */ | |
2355 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, | |
2356 | build_int_cst (gfc_charlen_type_node, 1)); | |
2357 | tmp = build_range_type (gfc_array_index_type, | |
2358 | gfc_index_zero_node, tmp); | |
2359 | tmp = build_array_type (gfc_character1_type_node, tmp); | |
2360 | var = gfc_create_var (build_pointer_type (tmp), "pstr"); | |
2361 | ||
2362 | /* Provide an address expression for the function arguments. */ | |
9596685a | 2363 | var = build_fold_addr_expr (var); |
08569428 | 2364 | } |
2365 | else | |
2366 | var = gfc_conv_string_tmp (se, type, len); | |
2367 | ||
2368 | retargs = gfc_chainon_list (retargs, var); | |
2369 | } | |
2370 | else | |
2371 | { | |
2372 | gcc_assert (gfc_option.flag_f2c && ts.type == BT_COMPLEX); | |
2373 | ||
2374 | type = gfc_get_complex_type (ts.kind); | |
9596685a | 2375 | var = build_fold_addr_expr (gfc_create_var (type, "cmplx")); |
08569428 | 2376 | retargs = gfc_chainon_list (retargs, var); |
2377 | } | |
2378 | ||
2379 | /* Add the string length to the argument list. */ | |
2380 | if (ts.type == BT_CHARACTER) | |
2381 | retargs = gfc_chainon_list (retargs, len); | |
2382 | } | |
f45a476e | 2383 | gfc_free_interface_mapping (&mapping); |
08569428 | 2384 | |
2385 | /* Add the return arguments. */ | |
2386 | arglist = chainon (retargs, arglist); | |
4ee9c684 | 2387 | |
2388 | /* Add the hidden string length parameters to the arguments. */ | |
2389 | arglist = chainon (arglist, stringargs); | |
2390 | ||
4e8e57b0 | 2391 | /* We may want to append extra arguments here. This is used e.g. for |
2392 | calls to libgfortran_matmul_??, which need extra information. */ | |
2393 | if (append_args != NULL_TREE) | |
2394 | arglist = chainon (arglist, append_args); | |
2395 | ||
4ee9c684 | 2396 | /* Generate the actual call. */ |
2397 | gfc_conv_function_val (se, sym); | |
57dd95f2 | 2398 | |
4ee9c684 | 2399 | /* If there are alternate return labels, function type should be |
079d21d5 | 2400 | integer. Can't modify the type in place though, since it can be shared |
57dd95f2 | 2401 | with other functions. For dummy arguments, the typing is done to |
2402 | to this result, even if it has to be repeated for each call. */ | |
079d21d5 | 2403 | if (has_alternate_specifier |
2404 | && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) != integer_type_node) | |
2405 | { | |
57dd95f2 | 2406 | if (!sym->attr.dummy) |
2407 | { | |
2408 | TREE_TYPE (sym->backend_decl) | |
2409 | = build_function_type (integer_type_node, | |
2410 | TYPE_ARG_TYPES (TREE_TYPE (sym->backend_decl))); | |
2411 | se->expr = build_fold_addr_expr (sym->backend_decl); | |
2412 | } | |
2413 | else | |
2414 | TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) = integer_type_node; | |
079d21d5 | 2415 | } |
4ee9c684 | 2416 | |
2417 | fntype = TREE_TYPE (TREE_TYPE (se->expr)); | |
c2f47e15 | 2418 | se->expr = build_call_list (TREE_TYPE (fntype), se->expr, arglist); |
4ee9c684 | 2419 | |
fa069004 | 2420 | /* If we have a pointer function, but we don't want a pointer, e.g. |
2421 | something like | |
2422 | x = f() | |
2423 | where f is pointer valued, we have to dereference the result. */ | |
bdaed7d2 | 2424 | if (!se->want_pointer && !byref && sym->attr.pointer) |
4fa2c167 | 2425 | se->expr = build_fold_indirect_ref (se->expr); |
fa069004 | 2426 | |
bdaed7d2 | 2427 | /* f2c calling conventions require a scalar default real function to |
2428 | return a double precision result. Convert this back to default | |
2429 | real. We only care about the cases that can happen in Fortran 77. | |
2430 | */ | |
2431 | if (gfc_option.flag_f2c && sym->ts.type == BT_REAL | |
2432 | && sym->ts.kind == gfc_default_real_kind | |
2433 | && !sym->attr.always_explicit) | |
2434 | se->expr = fold_convert (gfc_get_real_type (sym->ts.kind), se->expr); | |
2435 | ||
f888a3fb | 2436 | /* A pure function may still have side-effects - it may modify its |
2437 | parameters. */ | |
4ee9c684 | 2438 | TREE_SIDE_EFFECTS (se->expr) = 1; |
2439 | #if 0 | |
2440 | if (!sym->attr.pure) | |
2441 | TREE_SIDE_EFFECTS (se->expr) = 1; | |
2442 | #endif | |
2443 | ||
4396343e | 2444 | if (byref) |
4ee9c684 | 2445 | { |
4396343e | 2446 | /* Add the function call to the pre chain. There is no expression. */ |
4ee9c684 | 2447 | gfc_add_expr_to_block (&se->pre, se->expr); |
4396343e | 2448 | se->expr = NULL_TREE; |
4ee9c684 | 2449 | |
4396343e | 2450 | if (!se->direct_byref) |
4ee9c684 | 2451 | { |
65cf6ae7 | 2452 | if (sym->attr.dimension) |
4ee9c684 | 2453 | { |
4396343e | 2454 | if (flag_bounds_check) |
2455 | { | |
2456 | /* Check the data pointer hasn't been modified. This would | |
2457 | happen in a function returning a pointer. */ | |
94be45c9 | 2458 | tmp = gfc_conv_descriptor_data_get (info->descriptor); |
0eed5ee7 | 2459 | tmp = fold_build2 (NE_EXPR, boolean_type_node, |
2460 | tmp, info->data); | |
97c2a00c | 2461 | gfc_trans_runtime_check (tmp, gfc_msg_fault, &se->pre, NULL); |
4396343e | 2462 | } |
2463 | se->expr = info->descriptor; | |
bf7e666b | 2464 | /* Bundle in the string length. */ |
2465 | se->string_length = len; | |
4ee9c684 | 2466 | } |
4396343e | 2467 | else if (sym->ts.type == BT_CHARACTER) |
544c333b | 2468 | { |
bf7e666b | 2469 | /* Dereference for character pointer results. */ |
2470 | if (sym->attr.pointer || sym->attr.allocatable) | |
4fa2c167 | 2471 | se->expr = build_fold_indirect_ref (var); |
544c333b | 2472 | else |
bf7e666b | 2473 | se->expr = var; |
2474 | ||
4396343e | 2475 | se->string_length = len; |
2476 | } | |
2477 | else | |
bdaed7d2 | 2478 | { |
2479 | gcc_assert (sym->ts.type == BT_COMPLEX && gfc_option.flag_f2c); | |
4fa2c167 | 2480 | se->expr = build_fold_indirect_ref (var); |
bdaed7d2 | 2481 | } |
4ee9c684 | 2482 | } |
4ee9c684 | 2483 | } |
079d21d5 | 2484 | |
10b07432 | 2485 | /* Follow the function call with the argument post block. */ |
2486 | if (byref) | |
2487 | gfc_add_block_to_block (&se->pre, &post); | |
2488 | else | |
2489 | gfc_add_block_to_block (&se->post, &post); | |
2490 | ||
079d21d5 | 2491 | return has_alternate_specifier; |
4ee9c684 | 2492 | } |
2493 | ||
2494 | ||
dbe60343 | 2495 | /* Generate code to copy a string. */ |
2496 | ||
2497 | static void | |
72038310 | 2498 | gfc_trans_string_copy (stmtblock_t * block, tree dlength, tree dest, |
2499 | tree slength, tree src) | |
dbe60343 | 2500 | { |
72038310 | 2501 | tree tmp, dlen, slen; |
77100724 | 2502 | tree dsc; |
2503 | tree ssc; | |
2810b378 | 2504 | tree cond; |
59b9dcbd | 2505 | tree cond2; |
2506 | tree tmp2; | |
2507 | tree tmp3; | |
2508 | tree tmp4; | |
2509 | stmtblock_t tempblock; | |
77100724 | 2510 | |
72038310 | 2511 | dlen = fold_convert (size_type_node, gfc_evaluate_now (dlength, block)); |
2512 | slen = fold_convert (size_type_node, gfc_evaluate_now (slength, block)); | |
2513 | ||
77100724 | 2514 | /* Deal with single character specially. */ |
2515 | dsc = gfc_to_single_character (dlen, dest); | |
2516 | ssc = gfc_to_single_character (slen, src); | |
2517 | if (dsc != NULL_TREE && ssc != NULL_TREE) | |
2518 | { | |
2519 | gfc_add_modify_expr (block, dsc, ssc); | |
2520 | return; | |
2521 | } | |
dbe60343 | 2522 | |
59b9dcbd | 2523 | /* Do nothing if the destination length is zero. */ |
2810b378 | 2524 | cond = fold_build2 (GT_EXPR, boolean_type_node, dlen, |
2525 | build_int_cst (gfc_charlen_type_node, 0)); | |
2526 | ||
59b9dcbd | 2527 | /* The following code was previously in _gfortran_copy_string: |
2528 | ||
2529 | // The two strings may overlap so we use memmove. | |
2530 | void | |
2531 | copy_string (GFC_INTEGER_4 destlen, char * dest, | |
2532 | GFC_INTEGER_4 srclen, const char * src) | |
2533 | { | |
2534 | if (srclen >= destlen) | |
2535 | { | |
2536 | // This will truncate if too long. | |
2537 | memmove (dest, src, destlen); | |
2538 | } | |
2539 | else | |
2540 | { | |
2541 | memmove (dest, src, srclen); | |
2542 | // Pad with spaces. | |
2543 | memset (&dest[srclen], ' ', destlen - srclen); | |
2544 | } | |
2545 | } | |
2546 | ||
2547 | We're now doing it here for better optimization, but the logic | |
2548 | is the same. */ | |
2549 | ||
2550 | /* Truncate string if source is too long. */ | |
2551 | cond2 = fold_build2 (GE_EXPR, boolean_type_node, slen, dlen); | |
c2f47e15 | 2552 | tmp2 = build_call_expr (built_in_decls[BUILT_IN_MEMMOVE], |
2553 | 3, dest, src, dlen); | |
59b9dcbd | 2554 | |
2555 | /* Else copy and pad with spaces. */ | |
c2f47e15 | 2556 | tmp3 = build_call_expr (built_in_decls[BUILT_IN_MEMMOVE], |
2557 | 3, dest, src, slen); | |
59b9dcbd | 2558 | |
2559 | tmp4 = fold_build2 (PLUS_EXPR, pchar_type_node, dest, | |
2560 | fold_convert (pchar_type_node, slen)); | |
c2f47e15 | 2561 | tmp4 = build_call_expr (built_in_decls[BUILT_IN_MEMSET], 3, |
2562 | tmp4, | |
2563 | build_int_cst (gfc_get_int_type (gfc_c_int_kind), | |
2564 | lang_hooks.to_target_charset (' ')), | |
2565 | fold_build2 (MINUS_EXPR, TREE_TYPE(dlen), | |
2566 | dlen, slen)); | |
59b9dcbd | 2567 | |
2568 | gfc_init_block (&tempblock); | |
2569 | gfc_add_expr_to_block (&tempblock, tmp3); | |
2570 | gfc_add_expr_to_block (&tempblock, tmp4); | |
2571 | tmp3 = gfc_finish_block (&tempblock); | |
2572 | ||
2573 | /* The whole copy_string function is there. */ | |
2574 | tmp = fold_build3 (COND_EXPR, void_type_node, cond2, tmp2, tmp3); | |
2810b378 | 2575 | tmp = fold_build3 (COND_EXPR, void_type_node, cond, tmp, build_empty_stmt ()); |
dbe60343 | 2576 | gfc_add_expr_to_block (block, tmp); |
2577 | } | |
2578 | ||
2579 | ||
4ee9c684 | 2580 | /* Translate a statement function. |
2581 | The value of a statement function reference is obtained by evaluating the | |
2582 | expression using the values of the actual arguments for the values of the | |
2583 | corresponding dummy arguments. */ | |
2584 | ||
2585 | static void | |
2586 | gfc_conv_statement_function (gfc_se * se, gfc_expr * expr) | |
2587 | { | |
2588 | gfc_symbol *sym; | |
2589 | gfc_symbol *fsym; | |
2590 | gfc_formal_arglist *fargs; | |
2591 | gfc_actual_arglist *args; | |
2592 | gfc_se lse; | |
2593 | gfc_se rse; | |
dbe60343 | 2594 | gfc_saved_var *saved_vars; |
2595 | tree *temp_vars; | |
2596 | tree type; | |
2597 | tree tmp; | |
2598 | int n; | |
4ee9c684 | 2599 | |
2600 | sym = expr->symtree->n.sym; | |
2601 | args = expr->value.function.actual; | |
2602 | gfc_init_se (&lse, NULL); | |
2603 | gfc_init_se (&rse, NULL); | |
2604 | ||
dbe60343 | 2605 | n = 0; |
4ee9c684 | 2606 | for (fargs = sym->formal; fargs; fargs = fargs->next) |
dbe60343 | 2607 | n++; |
2608 | saved_vars = (gfc_saved_var *)gfc_getmem (n * sizeof (gfc_saved_var)); | |
2609 | temp_vars = (tree *)gfc_getmem (n * sizeof (tree)); | |
2610 | ||
2611 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) | |
4ee9c684 | 2612 | { |
2613 | /* Each dummy shall be specified, explicitly or implicitly, to be | |
2614 | scalar. */ | |
22d678e8 | 2615 | gcc_assert (fargs->sym->attr.dimension == 0); |
4ee9c684 | 2616 | fsym = fargs->sym; |
4ee9c684 | 2617 | |
dbe60343 | 2618 | /* Create a temporary to hold the value. */ |
2619 | type = gfc_typenode_for_spec (&fsym->ts); | |
2620 | temp_vars[n] = gfc_create_var (type, fsym->name); | |
2621 | ||
2622 | if (fsym->ts.type == BT_CHARACTER) | |
4ee9c684 | 2623 | { |
dbe60343 | 2624 | /* Copy string arguments. */ |
2625 | tree arglen; | |
4ee9c684 | 2626 | |
22d678e8 | 2627 | gcc_assert (fsym->ts.cl && fsym->ts.cl->length |
4ee9c684 | 2628 | && fsym->ts.cl->length->expr_type == EXPR_CONSTANT); |
2629 | ||
dbe60343 | 2630 | arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
2631 | tmp = gfc_build_addr_expr (build_pointer_type (type), | |
2632 | temp_vars[n]); | |
4ee9c684 | 2633 | |
2634 | gfc_conv_expr (&rse, args->expr); | |
2635 | gfc_conv_string_parameter (&rse); | |
4ee9c684 | 2636 | gfc_add_block_to_block (&se->pre, &lse.pre); |
2637 | gfc_add_block_to_block (&se->pre, &rse.pre); | |
2638 | ||
dbe60343 | 2639 | gfc_trans_string_copy (&se->pre, arglen, tmp, rse.string_length, |
2640 | rse.expr); | |
4ee9c684 | 2641 | gfc_add_block_to_block (&se->pre, &lse.post); |
2642 | gfc_add_block_to_block (&se->pre, &rse.post); | |
2643 | } | |
2644 | else | |
2645 | { | |
2646 | /* For everything else, just evaluate the expression. */ | |
4ee9c684 | 2647 | gfc_conv_expr (&lse, args->expr); |
2648 | ||
2649 | gfc_add_block_to_block (&se->pre, &lse.pre); | |
dbe60343 | 2650 | gfc_add_modify_expr (&se->pre, temp_vars[n], lse.expr); |
4ee9c684 | 2651 | gfc_add_block_to_block (&se->pre, &lse.post); |
2652 | } | |
dbe60343 | 2653 | |
4ee9c684 | 2654 | args = args->next; |
2655 | } | |
dbe60343 | 2656 | |
2657 | /* Use the temporary variables in place of the real ones. */ | |
2658 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) | |
2659 | gfc_shadow_sym (fargs->sym, temp_vars[n], &saved_vars[n]); | |
2660 | ||
4ee9c684 | 2661 | gfc_conv_expr (se, sym->value); |
dbe60343 | 2662 | |
2663 | if (sym->ts.type == BT_CHARACTER) | |
2664 | { | |
2665 | gfc_conv_const_charlen (sym->ts.cl); | |
2666 | ||
2667 | /* Force the expression to the correct length. */ | |
2668 | if (!INTEGER_CST_P (se->string_length) | |
2669 | || tree_int_cst_lt (se->string_length, | |
2670 | sym->ts.cl->backend_decl)) | |
2671 | { | |
2672 | type = gfc_get_character_type (sym->ts.kind, sym->ts.cl); | |
2673 | tmp = gfc_create_var (type, sym->name); | |
2674 | tmp = gfc_build_addr_expr (build_pointer_type (type), tmp); | |
2675 | gfc_trans_string_copy (&se->pre, sym->ts.cl->backend_decl, tmp, | |
2676 | se->string_length, se->expr); | |
2677 | se->expr = tmp; | |
2678 | } | |
2679 | se->string_length = sym->ts.cl->backend_decl; | |
2680 | } | |
2681 | ||
f888a3fb | 2682 | /* Restore the original variables. */ |
dbe60343 | 2683 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) |
2684 | gfc_restore_sym (fargs->sym, &saved_vars[n]); | |
2685 | gfc_free (saved_vars); | |
4ee9c684 | 2686 | } |
2687 | ||
2688 | ||
2689 | /* Translate a function expression. */ | |
2690 | ||
2691 | static void | |
2692 | gfc_conv_function_expr (gfc_se * se, gfc_expr * expr) | |
2693 | { | |
2694 | gfc_symbol *sym; | |
2695 | ||
2696 | if (expr->value.function.isym) | |
2697 | { | |
2698 | gfc_conv_intrinsic_function (se, expr); | |
2699 | return; | |
2700 | } | |
2701 | ||
f888a3fb | 2702 | /* We distinguish statement functions from general functions to improve |
4ee9c684 | 2703 | runtime performance. */ |
2704 | if (expr->symtree->n.sym->attr.proc == PROC_ST_FUNCTION) | |
2705 | { | |
2706 | gfc_conv_statement_function (se, expr); | |
2707 | return; | |
2708 | } | |
2709 | ||
2710 | /* expr.value.function.esym is the resolved (specific) function symbol for | |
2711 | most functions. However this isn't set for dummy procedures. */ | |
2712 | sym = expr->value.function.esym; | |
2713 | if (!sym) | |
2714 | sym = expr->symtree->n.sym; | |
4e8e57b0 | 2715 | gfc_conv_function_call (se, sym, expr->value.function.actual, NULL_TREE); |
4ee9c684 | 2716 | } |
2717 | ||
f888a3fb | 2718 | |
4ee9c684 | 2719 | static void |
2720 | gfc_conv_array_constructor_expr (gfc_se * se, gfc_expr * expr) | |
2721 | { | |
22d678e8 | 2722 | gcc_assert (se->ss != NULL && se->ss != gfc_ss_terminator); |
2723 | gcc_assert (se->ss->expr == expr && se->ss->type == GFC_SS_CONSTRUCTOR); | |
4ee9c684 | 2724 | |
2725 | gfc_conv_tmp_array_ref (se); | |
2726 | gfc_advance_se_ss_chain (se); | |
2727 | } | |
2728 | ||
2729 | ||
bda1f152 | 2730 | /* Build a static initializer. EXPR is the expression for the initial value. |
f888a3fb | 2731 | The other parameters describe the variable of the component being |
2732 | initialized. EXPR may be null. */ | |
4ee9c684 | 2733 | |
bda1f152 | 2734 | tree |
2735 | gfc_conv_initializer (gfc_expr * expr, gfc_typespec * ts, tree type, | |
2736 | bool array, bool pointer) | |
2737 | { | |
2738 | gfc_se se; | |
2739 | ||
2740 | if (!(expr || pointer)) | |
2741 | return NULL_TREE; | |
2742 | ||
2743 | if (array) | |
2744 | { | |
2745 | /* Arrays need special handling. */ | |
2746 | if (pointer) | |
2747 | return gfc_build_null_descriptor (type); | |
2748 | else | |
2749 | return gfc_conv_array_initializer (type, expr); | |
2750 | } | |
2751 | else if (pointer) | |
2752 | return fold_convert (type, null_pointer_node); | |
2753 | else | |
2754 | { | |
2755 | switch (ts->type) | |
2756 | { | |
2757 | case BT_DERIVED: | |
2758 | gfc_init_se (&se, NULL); | |
2759 | gfc_conv_structure (&se, expr, 1); | |
2760 | return se.expr; | |
2761 | ||
2762 | case BT_CHARACTER: | |
2763 | return gfc_conv_string_init (ts->cl->backend_decl,expr); | |
2764 | ||
2765 | default: | |
2766 | gfc_init_se (&se, NULL); | |
2767 | gfc_conv_constant (&se, expr); | |
2768 | return se.expr; | |
2769 | } | |
2770 | } | |
2771 | } | |
2772 | ||
9a0aec1d | 2773 | static tree |
2774 | gfc_trans_subarray_assign (tree dest, gfc_component * cm, gfc_expr * expr) | |
2775 | { | |
2776 | gfc_se rse; | |
2777 | gfc_se lse; | |
2778 | gfc_ss *rss; | |
2779 | gfc_ss *lss; | |
2780 | stmtblock_t body; | |
2781 | stmtblock_t block; | |
2782 | gfc_loopinfo loop; | |
2783 | int n; | |
2784 | tree tmp; | |
2785 | ||
2786 | gfc_start_block (&block); | |
2787 | ||
2788 | /* Initialize the scalarizer. */ | |
2789 | gfc_init_loopinfo (&loop); | |
2790 | ||
2791 | gfc_init_se (&lse, NULL); | |
2792 | gfc_init_se (&rse, NULL); | |
2793 | ||
2794 | /* Walk the rhs. */ | |
2795 | rss = gfc_walk_expr (expr); | |
2796 | if (rss == gfc_ss_terminator) | |
2797 | { | |
2798 | /* The rhs is scalar. Add a ss for the expression. */ | |
2799 | rss = gfc_get_ss (); | |
2800 | rss->next = gfc_ss_terminator; | |
2801 | rss->type = GFC_SS_SCALAR; | |
2802 | rss->expr = expr; | |
2803 | } | |
2804 | ||
2805 | /* Create a SS for the destination. */ | |
2806 | lss = gfc_get_ss (); | |
2807 | lss->type = GFC_SS_COMPONENT; | |
2808 | lss->expr = NULL; | |
2809 | lss->shape = gfc_get_shape (cm->as->rank); | |
2810 | lss->next = gfc_ss_terminator; | |
2811 | lss->data.info.dimen = cm->as->rank; | |
2812 | lss->data.info.descriptor = dest; | |
2813 | lss->data.info.data = gfc_conv_array_data (dest); | |
2814 | lss->data.info.offset = gfc_conv_array_offset (dest); | |
2815 | for (n = 0; n < cm->as->rank; n++) | |
2816 | { | |
2817 | lss->data.info.dim[n] = n; | |
2818 | lss->data.info.start[n] = gfc_conv_array_lbound (dest, n); | |
2819 | lss->data.info.stride[n] = gfc_index_one_node; | |
2820 | ||
2821 | mpz_init (lss->shape[n]); | |
2822 | mpz_sub (lss->shape[n], cm->as->upper[n]->value.integer, | |
2823 | cm->as->lower[n]->value.integer); | |
2824 | mpz_add_ui (lss->shape[n], lss->shape[n], 1); | |
2825 | } | |
2826 | ||
2827 | /* Associate the SS with the loop. */ | |
2828 | gfc_add_ss_to_loop (&loop, lss); | |
2829 | gfc_add_ss_to_loop (&loop, rss); | |
2830 | ||
2831 | /* Calculate the bounds of the scalarization. */ | |
2832 | gfc_conv_ss_startstride (&loop); | |
2833 | ||
2834 | /* Setup the scalarizing loops. */ | |
2835 | gfc_conv_loop_setup (&loop); | |
2836 | ||
2837 | /* Setup the gfc_se structures. */ | |
2838 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
2839 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
2840 | ||
2841 | rse.ss = rss; | |
2842 | gfc_mark_ss_chain_used (rss, 1); | |
2843 | lse.ss = lss; | |
2844 | gfc_mark_ss_chain_used (lss, 1); | |
2845 | ||
2846 | /* Start the scalarized loop body. */ | |
2847 | gfc_start_scalarized_body (&loop, &body); | |
2848 | ||
2849 | gfc_conv_tmp_array_ref (&lse); | |
dc5fe211 | 2850 | if (cm->ts.type == BT_CHARACTER) |
2851 | lse.string_length = cm->ts.cl->backend_decl; | |
2852 | ||
9a0aec1d | 2853 | gfc_conv_expr (&rse, expr); |
2854 | ||
2294b616 | 2855 | tmp = gfc_trans_scalar_assign (&lse, &rse, cm->ts, true, false); |
9a0aec1d | 2856 | gfc_add_expr_to_block (&body, tmp); |
2857 | ||
22d678e8 | 2858 | gcc_assert (rse.ss == gfc_ss_terminator); |
9a0aec1d | 2859 | |
2860 | /* Generate the copying loops. */ | |
2861 | gfc_trans_scalarizing_loops (&loop, &body); | |
2862 | ||
2863 | /* Wrap the whole thing up. */ | |
2864 | gfc_add_block_to_block (&block, &loop.pre); | |
2865 | gfc_add_block_to_block (&block, &loop.post); | |
2866 | ||
9a0aec1d | 2867 | for (n = 0; n < cm->as->rank; n++) |
2868 | mpz_clear (lss->shape[n]); | |
2869 | gfc_free (lss->shape); | |
2870 | ||
6cf06ccd | 2871 | gfc_cleanup_loop (&loop); |
2872 | ||
9a0aec1d | 2873 | return gfc_finish_block (&block); |
2874 | } | |
2875 | ||
2294b616 | 2876 | |
9a0aec1d | 2877 | /* Assign a single component of a derived type constructor. */ |
2878 | ||
2879 | static tree | |
2880 | gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr) | |
2881 | { | |
2882 | gfc_se se; | |
2294b616 | 2883 | gfc_se lse; |
9a0aec1d | 2884 | gfc_ss *rss; |
2885 | stmtblock_t block; | |
2886 | tree tmp; | |
2294b616 | 2887 | tree offset; |
2888 | int n; | |
9a0aec1d | 2889 | |
2890 | gfc_start_block (&block); | |
2294b616 | 2891 | |
9a0aec1d | 2892 | if (cm->pointer) |
2893 | { | |
2894 | gfc_init_se (&se, NULL); | |
2895 | /* Pointer component. */ | |
2896 | if (cm->dimension) | |
2897 | { | |
2898 | /* Array pointer. */ | |
2899 | if (expr->expr_type == EXPR_NULL) | |
94be45c9 | 2900 | gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
9a0aec1d | 2901 | else |
2902 | { | |
2903 | rss = gfc_walk_expr (expr); | |
2904 | se.direct_byref = 1; | |
2905 | se.expr = dest; | |
2906 | gfc_conv_expr_descriptor (&se, expr, rss); | |
2907 | gfc_add_block_to_block (&block, &se.pre); | |
2908 | gfc_add_block_to_block (&block, &se.post); | |
2909 | } | |
2910 | } | |
2911 | else | |
2912 | { | |
2913 | /* Scalar pointers. */ | |
2914 | se.want_pointer = 1; | |
2915 | gfc_conv_expr (&se, expr); | |
2916 | gfc_add_block_to_block (&block, &se.pre); | |
2917 | gfc_add_modify_expr (&block, dest, | |
2918 | fold_convert (TREE_TYPE (dest), se.expr)); | |
2919 | gfc_add_block_to_block (&block, &se.post); | |
2920 | } | |
2921 | } | |
2922 | else if (cm->dimension) | |
2923 | { | |
2294b616 | 2924 | if (cm->allocatable && expr->expr_type == EXPR_NULL) |
2925 | gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); | |
2926 | else if (cm->allocatable) | |
2927 | { | |
2928 | tree tmp2; | |
2929 | ||
2930 | gfc_init_se (&se, NULL); | |
2931 | ||
2932 | rss = gfc_walk_expr (expr); | |
2933 | se.want_pointer = 0; | |
2934 | gfc_conv_expr_descriptor (&se, expr, rss); | |
2935 | gfc_add_block_to_block (&block, &se.pre); | |
2936 | ||
2937 | tmp = fold_convert (TREE_TYPE (dest), se.expr); | |
2938 | gfc_add_modify_expr (&block, dest, tmp); | |
2939 | ||
2940 | if (cm->ts.type == BT_DERIVED && cm->ts.derived->attr.alloc_comp) | |
2941 | tmp = gfc_copy_alloc_comp (cm->ts.derived, se.expr, dest, | |
2942 | cm->as->rank); | |
2943 | else | |
2944 | tmp = gfc_duplicate_allocatable (dest, se.expr, | |
2945 | TREE_TYPE(cm->backend_decl), | |
2946 | cm->as->rank); | |
2947 | ||
2948 | gfc_add_expr_to_block (&block, tmp); | |
2949 | ||
2950 | gfc_add_block_to_block (&block, &se.post); | |
2951 | gfc_conv_descriptor_data_set (&block, se.expr, null_pointer_node); | |
2952 | ||
2953 | /* Shift the lbound and ubound of temporaries to being unity, rather | |
2954 | than zero, based. Calculate the offset for all cases. */ | |
2955 | offset = gfc_conv_descriptor_offset (dest); | |
2956 | gfc_add_modify_expr (&block, offset, gfc_index_zero_node); | |
2957 | tmp2 =gfc_create_var (gfc_array_index_type, NULL); | |
2958 | for (n = 0; n < expr->rank; n++) | |
2959 | { | |
2960 | if (expr->expr_type != EXPR_VARIABLE | |
2961 | && expr->expr_type != EXPR_CONSTANT) | |
2962 | { | |
2963 | tmp = gfc_conv_descriptor_ubound (dest, gfc_rank_cst[n]); | |
2964 | gfc_add_modify_expr (&block, tmp, | |
2965 | fold_build2 (PLUS_EXPR, | |
2966 | gfc_array_index_type, | |
2967 | tmp, gfc_index_one_node)); | |
2968 | tmp = gfc_conv_descriptor_lbound (dest, gfc_rank_cst[n]); | |
2969 | gfc_add_modify_expr (&block, tmp, gfc_index_one_node); | |
2970 | } | |
2971 | tmp = fold_build2 (MULT_EXPR, gfc_array_index_type, | |
2972 | gfc_conv_descriptor_lbound (dest, | |
2973 | gfc_rank_cst[n]), | |
2974 | gfc_conv_descriptor_stride (dest, | |
2975 | gfc_rank_cst[n])); | |
2976 | gfc_add_modify_expr (&block, tmp2, tmp); | |
2977 | tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp2); | |
2978 | gfc_add_modify_expr (&block, offset, tmp); | |
2979 | } | |
2980 | } | |
2981 | else | |
2982 | { | |
2983 | tmp = gfc_trans_subarray_assign (dest, cm, expr); | |
2984 | gfc_add_expr_to_block (&block, tmp); | |
2985 | } | |
9a0aec1d | 2986 | } |
2987 | else if (expr->ts.type == BT_DERIVED) | |
2988 | { | |
d95efb59 | 2989 | if (expr->expr_type != EXPR_STRUCTURE) |
2990 | { | |
2991 | gfc_init_se (&se, NULL); | |
2992 | gfc_conv_expr (&se, expr); | |
2993 | gfc_add_modify_expr (&block, dest, | |
2994 | fold_convert (TREE_TYPE (dest), se.expr)); | |
2995 | } | |
2996 | else | |
2997 | { | |
2998 | /* Nested constructors. */ | |
2999 | tmp = gfc_trans_structure_assign (dest, expr); | |
3000 | gfc_add_expr_to_block (&block, tmp); | |
3001 | } | |
9a0aec1d | 3002 | } |
3003 | else | |
3004 | { | |
3005 | /* Scalar component. */ | |
9a0aec1d | 3006 | gfc_init_se (&se, NULL); |
3007 | gfc_init_se (&lse, NULL); | |
3008 | ||
3009 | gfc_conv_expr (&se, expr); | |
3010 | if (cm->ts.type == BT_CHARACTER) | |
3011 | lse.string_length = cm->ts.cl->backend_decl; | |
3012 | lse.expr = dest; | |
2294b616 | 3013 | tmp = gfc_trans_scalar_assign (&lse, &se, cm->ts, true, false); |
9a0aec1d | 3014 | gfc_add_expr_to_block (&block, tmp); |
3015 | } | |
3016 | return gfc_finish_block (&block); | |
3017 | } | |
3018 | ||
39fca56b | 3019 | /* Assign a derived type constructor to a variable. */ |
9a0aec1d | 3020 | |
3021 | static tree | |
3022 | gfc_trans_structure_assign (tree dest, gfc_expr * expr) | |
3023 | { | |
3024 | gfc_constructor *c; | |
3025 | gfc_component *cm; | |
3026 | stmtblock_t block; | |
3027 | tree field; | |
3028 | tree tmp; | |
3029 | ||
3030 | gfc_start_block (&block); | |
3031 | cm = expr->ts.derived->components; | |
3032 | for (c = expr->value.constructor; c; c = c->next, cm = cm->next) | |
3033 | { | |
3034 | /* Skip absent members in default initializers. */ | |
3035 | if (!c->expr) | |
3036 | continue; | |
3037 | ||
3038 | field = cm->backend_decl; | |
ed52ef8b | 3039 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), dest, field, NULL_TREE); |
9a0aec1d | 3040 | tmp = gfc_trans_subcomponent_assign (tmp, cm, c->expr); |
3041 | gfc_add_expr_to_block (&block, tmp); | |
3042 | } | |
3043 | return gfc_finish_block (&block); | |
3044 | } | |
3045 | ||
4ee9c684 | 3046 | /* Build an expression for a constructor. If init is nonzero then |
3047 | this is part of a static variable initializer. */ | |
3048 | ||
3049 | void | |
3050 | gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init) | |
3051 | { | |
3052 | gfc_constructor *c; | |
3053 | gfc_component *cm; | |
4ee9c684 | 3054 | tree val; |
4ee9c684 | 3055 | tree type; |
9a0aec1d | 3056 | tree tmp; |
c75b4594 | 3057 | VEC(constructor_elt,gc) *v = NULL; |
4ee9c684 | 3058 | |
22d678e8 | 3059 | gcc_assert (se->ss == NULL); |
3060 | gcc_assert (expr->expr_type == EXPR_STRUCTURE); | |
4ee9c684 | 3061 | type = gfc_typenode_for_spec (&expr->ts); |
9a0aec1d | 3062 | |
3063 | if (!init) | |
3064 | { | |
3065 | /* Create a temporary variable and fill it in. */ | |
3066 | se->expr = gfc_create_var (type, expr->ts.derived->name); | |
3067 | tmp = gfc_trans_structure_assign (se->expr, expr); | |
3068 | gfc_add_expr_to_block (&se->pre, tmp); | |
3069 | return; | |
3070 | } | |
3071 | ||
4ee9c684 | 3072 | cm = expr->ts.derived->components; |
2294b616 | 3073 | |
4ee9c684 | 3074 | for (c = expr->value.constructor; c; c = c->next, cm = cm->next) |
3075 | { | |
2294b616 | 3076 | /* Skip absent members in default initializers and allocatable |
3077 | components. Although the latter have a default initializer | |
3078 | of EXPR_NULL,... by default, the static nullify is not needed | |
3079 | since this is done every time we come into scope. */ | |
3080 | if (!c->expr || cm->allocatable) | |
4ee9c684 | 3081 | continue; |
3082 | ||
9a0aec1d | 3083 | val = gfc_conv_initializer (c->expr, &cm->ts, |
3084 | TREE_TYPE (cm->backend_decl), cm->dimension, cm->pointer); | |
4ee9c684 | 3085 | |
c75b4594 | 3086 | /* Append it to the constructor list. */ |
3087 | CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val); | |
4ee9c684 | 3088 | } |
c75b4594 | 3089 | se->expr = build_constructor (type, v); |
4ee9c684 | 3090 | } |
3091 | ||
3092 | ||
f888a3fb | 3093 | /* Translate a substring expression. */ |
4ee9c684 | 3094 | |
3095 | static void | |
3096 | gfc_conv_substring_expr (gfc_se * se, gfc_expr * expr) | |
3097 | { | |
3098 | gfc_ref *ref; | |
3099 | ||
3100 | ref = expr->ref; | |
3101 | ||
22d678e8 | 3102 | gcc_assert (ref->type == REF_SUBSTRING); |
4ee9c684 | 3103 | |
3104 | se->expr = gfc_build_string_const(expr->value.character.length, | |
3105 | expr->value.character.string); | |
3106 | se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr))); | |
3107 | TYPE_STRING_FLAG (TREE_TYPE (se->expr))=1; | |
3108 | ||
ee3729de | 3109 | gfc_conv_substring(se,ref,expr->ts.kind,NULL,&expr->where); |
4ee9c684 | 3110 | } |
3111 | ||
3112 | ||
7b7afa03 | 3113 | /* Entry point for expression translation. Evaluates a scalar quantity. |
3114 | EXPR is the expression to be translated, and SE is the state structure if | |
3115 | called from within the scalarized. */ | |
4ee9c684 | 3116 | |
3117 | void | |
3118 | gfc_conv_expr (gfc_se * se, gfc_expr * expr) | |
3119 | { | |
3120 | if (se->ss && se->ss->expr == expr | |
3121 | && (se->ss->type == GFC_SS_SCALAR || se->ss->type == GFC_SS_REFERENCE)) | |
3122 | { | |
9a0aec1d | 3123 | /* Substitute a scalar expression evaluated outside the scalarization |
4ee9c684 | 3124 | loop. */ |
3125 | se->expr = se->ss->data.scalar.expr; | |
7949cb07 | 3126 | se->string_length = se->ss->string_length; |
4ee9c684 | 3127 | gfc_advance_se_ss_chain (se); |
3128 | return; | |
3129 | } | |
3130 | ||
3131 | switch (expr->expr_type) | |
3132 | { | |
3133 | case EXPR_OP: | |
3134 | gfc_conv_expr_op (se, expr); | |
3135 | break; | |
3136 | ||
3137 | case EXPR_FUNCTION: | |
3138 | gfc_conv_function_expr (se, expr); | |
3139 | break; | |
3140 | ||
3141 | case EXPR_CONSTANT: | |
3142 | gfc_conv_constant (se, expr); | |
3143 | break; | |
3144 | ||
3145 | case EXPR_VARIABLE: | |
3146 | gfc_conv_variable (se, expr); | |
3147 | break; | |
3148 | ||
3149 | case EXPR_NULL: | |
3150 | se->expr = null_pointer_node; | |
3151 | break; | |
3152 | ||
3153 | case EXPR_SUBSTRING: | |
3154 | gfc_conv_substring_expr (se, expr); | |
3155 | break; | |
3156 | ||
3157 | case EXPR_STRUCTURE: | |
3158 | gfc_conv_structure (se, expr, 0); | |
3159 | break; | |
3160 | ||
3161 | case EXPR_ARRAY: | |
3162 | gfc_conv_array_constructor_expr (se, expr); | |
3163 | break; | |
3164 | ||
3165 | default: | |
22d678e8 | 3166 | gcc_unreachable (); |
4ee9c684 | 3167 | break; |
3168 | } | |
3169 | } | |
3170 | ||
7b7afa03 | 3171 | /* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs |
3172 | of an assignment. */ | |
4ee9c684 | 3173 | void |
3174 | gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr) | |
3175 | { | |
3176 | gfc_conv_expr (se, expr); | |
7b7afa03 | 3177 | /* All numeric lvalues should have empty post chains. If not we need to |
4ee9c684 | 3178 | figure out a way of rewriting an lvalue so that it has no post chain. */ |
7b7afa03 | 3179 | gcc_assert (expr->ts.type == BT_CHARACTER || !se->post.head); |
4ee9c684 | 3180 | } |
3181 | ||
7b7afa03 | 3182 | /* Like gfc_conv_expr, but the POST block is guaranteed to be empty for |
d4163395 | 3183 | numeric expressions. Used for scalar values where inserting cleanup code |
7b7afa03 | 3184 | is inconvenient. */ |
4ee9c684 | 3185 | void |
3186 | gfc_conv_expr_val (gfc_se * se, gfc_expr * expr) | |
3187 | { | |
3188 | tree val; | |
3189 | ||
22d678e8 | 3190 | gcc_assert (expr->ts.type != BT_CHARACTER); |
4ee9c684 | 3191 | gfc_conv_expr (se, expr); |
3192 | if (se->post.head) | |
3193 | { | |
3194 | val = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
3195 | gfc_add_modify_expr (&se->pre, val, se->expr); | |
7b7afa03 | 3196 | se->expr = val; |
3197 | gfc_add_block_to_block (&se->pre, &se->post); | |
4ee9c684 | 3198 | } |
3199 | } | |
3200 | ||
7b7afa03 | 3201 | /* Helper to translate and expression and convert it to a particular type. */ |
4ee9c684 | 3202 | void |
3203 | gfc_conv_expr_type (gfc_se * se, gfc_expr * expr, tree type) | |
3204 | { | |
3205 | gfc_conv_expr_val (se, expr); | |
3206 | se->expr = convert (type, se->expr); | |
3207 | } | |
3208 | ||
3209 | ||
f888a3fb | 3210 | /* Converts an expression so that it can be passed by reference. Scalar |
4ee9c684 | 3211 | values only. */ |
3212 | ||
3213 | void | |
3214 | gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr) | |
3215 | { | |
3216 | tree var; | |
3217 | ||
3218 | if (se->ss && se->ss->expr == expr | |
3219 | && se->ss->type == GFC_SS_REFERENCE) | |
3220 | { | |
3221 | se->expr = se->ss->data.scalar.expr; | |
7949cb07 | 3222 | se->string_length = se->ss->string_length; |
4ee9c684 | 3223 | gfc_advance_se_ss_chain (se); |
3224 | return; | |
3225 | } | |
3226 | ||
3227 | if (expr->ts.type == BT_CHARACTER) | |
3228 | { | |
3229 | gfc_conv_expr (se, expr); | |
3230 | gfc_conv_string_parameter (se); | |
3231 | return; | |
3232 | } | |
3233 | ||
3234 | if (expr->expr_type == EXPR_VARIABLE) | |
3235 | { | |
3236 | se->want_pointer = 1; | |
3237 | gfc_conv_expr (se, expr); | |
3238 | if (se->post.head) | |
3239 | { | |
3240 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
3241 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
3242 | gfc_add_block_to_block (&se->pre, &se->post); | |
3243 | se->expr = var; | |
3244 | } | |
3245 | return; | |
3246 | } | |
3247 | ||
3248 | gfc_conv_expr (se, expr); | |
3249 | ||
3250 | /* Create a temporary var to hold the value. */ | |
e67e5e1f | 3251 | if (TREE_CONSTANT (se->expr)) |
3252 | { | |
0f9dc66f | 3253 | tree tmp = se->expr; |
3254 | STRIP_TYPE_NOPS (tmp); | |
3255 | var = build_decl (CONST_DECL, NULL, TREE_TYPE (tmp)); | |
3256 | DECL_INITIAL (var) = tmp; | |
f79c8ea7 | 3257 | TREE_STATIC (var) = 1; |
e67e5e1f | 3258 | pushdecl (var); |
3259 | } | |
3260 | else | |
3261 | { | |
3262 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
3263 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
3264 | } | |
4ee9c684 | 3265 | gfc_add_block_to_block (&se->pre, &se->post); |
3266 | ||
3267 | /* Take the address of that value. */ | |
9596685a | 3268 | se->expr = build_fold_addr_expr (var); |
4ee9c684 | 3269 | } |
3270 | ||
3271 | ||
3272 | tree | |
3273 | gfc_trans_pointer_assign (gfc_code * code) | |
3274 | { | |
3275 | return gfc_trans_pointer_assignment (code->expr, code->expr2); | |
3276 | } | |
3277 | ||
3278 | ||
4396343e | 3279 | /* Generate code for a pointer assignment. */ |
3280 | ||
4ee9c684 | 3281 | tree |
3282 | gfc_trans_pointer_assignment (gfc_expr * expr1, gfc_expr * expr2) | |
3283 | { | |
3284 | gfc_se lse; | |
3285 | gfc_se rse; | |
3286 | gfc_ss *lss; | |
3287 | gfc_ss *rss; | |
3288 | stmtblock_t block; | |
7853829d | 3289 | tree desc; |
3290 | tree tmp; | |
4ee9c684 | 3291 | |
3292 | gfc_start_block (&block); | |
3293 | ||
3294 | gfc_init_se (&lse, NULL); | |
3295 | ||
3296 | lss = gfc_walk_expr (expr1); | |
3297 | rss = gfc_walk_expr (expr2); | |
3298 | if (lss == gfc_ss_terminator) | |
3299 | { | |
4396343e | 3300 | /* Scalar pointers. */ |
4ee9c684 | 3301 | lse.want_pointer = 1; |
3302 | gfc_conv_expr (&lse, expr1); | |
22d678e8 | 3303 | gcc_assert (rss == gfc_ss_terminator); |
4ee9c684 | 3304 | gfc_init_se (&rse, NULL); |
3305 | rse.want_pointer = 1; | |
3306 | gfc_conv_expr (&rse, expr2); | |
3307 | gfc_add_block_to_block (&block, &lse.pre); | |
3308 | gfc_add_block_to_block (&block, &rse.pre); | |
260abd71 | 3309 | gfc_add_modify_expr (&block, lse.expr, |
3310 | fold_convert (TREE_TYPE (lse.expr), rse.expr)); | |
4ee9c684 | 3311 | gfc_add_block_to_block (&block, &rse.post); |
3312 | gfc_add_block_to_block (&block, &lse.post); | |
3313 | } | |
3314 | else | |
3315 | { | |
4396343e | 3316 | /* Array pointer. */ |
4ee9c684 | 3317 | gfc_conv_expr_descriptor (&lse, expr1, lss); |
7853829d | 3318 | switch (expr2->expr_type) |
3319 | { | |
3320 | case EXPR_NULL: | |
3321 | /* Just set the data pointer to null. */ | |
ca122904 | 3322 | gfc_conv_descriptor_data_set (&lse.pre, lse.expr, null_pointer_node); |
7853829d | 3323 | break; |
3324 | ||
3325 | case EXPR_VARIABLE: | |
3326 | /* Assign directly to the pointer's descriptor. */ | |
4ee9c684 | 3327 | lse.direct_byref = 1; |
7853829d | 3328 | gfc_conv_expr_descriptor (&lse, expr2, rss); |
3329 | break; | |
3330 | ||
3331 | default: | |
3332 | /* Assign to a temporary descriptor and then copy that | |
3333 | temporary to the pointer. */ | |
3334 | desc = lse.expr; | |
3335 | tmp = gfc_create_var (TREE_TYPE (desc), "ptrtemp"); | |
3336 | ||
3337 | lse.expr = tmp; | |
3338 | lse.direct_byref = 1; | |
3339 | gfc_conv_expr_descriptor (&lse, expr2, rss); | |
3340 | gfc_add_modify_expr (&lse.pre, desc, tmp); | |
3341 | break; | |
4ee9c684 | 3342 | } |
3343 | gfc_add_block_to_block (&block, &lse.pre); | |
3344 | gfc_add_block_to_block (&block, &lse.post); | |
3345 | } | |
3346 | return gfc_finish_block (&block); | |
3347 | } | |
3348 | ||
3349 | ||
3350 | /* Makes sure se is suitable for passing as a function string parameter. */ | |
3351 | /* TODO: Need to check all callers fo this function. It may be abused. */ | |
3352 | ||
3353 | void | |
3354 | gfc_conv_string_parameter (gfc_se * se) | |
3355 | { | |
3356 | tree type; | |
3357 | ||
3358 | if (TREE_CODE (se->expr) == STRING_CST) | |
3359 | { | |
3360 | se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); | |
3361 | return; | |
3362 | } | |
3363 | ||
3364 | type = TREE_TYPE (se->expr); | |
3365 | if (TYPE_STRING_FLAG (type)) | |
3366 | { | |
22d678e8 | 3367 | gcc_assert (TREE_CODE (se->expr) != INDIRECT_REF); |
4ee9c684 | 3368 | se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); |
3369 | } | |
3370 | ||
22d678e8 | 3371 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (se->expr))); |
3372 | gcc_assert (se->string_length | |
4ee9c684 | 3373 | && TREE_CODE (TREE_TYPE (se->string_length)) == INTEGER_TYPE); |
3374 | } | |
3375 | ||
3376 | ||
3377 | /* Generate code for assignment of scalar variables. Includes character | |
2294b616 | 3378 | strings and derived types with allocatable components. */ |
4ee9c684 | 3379 | |
3380 | tree | |
2294b616 | 3381 | gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts, |
3382 | bool l_is_temp, bool r_is_var) | |
4ee9c684 | 3383 | { |
4ee9c684 | 3384 | stmtblock_t block; |
2294b616 | 3385 | tree tmp; |
3386 | tree cond; | |
4ee9c684 | 3387 | |
3388 | gfc_init_block (&block); | |
3389 | ||
2294b616 | 3390 | if (ts.type == BT_CHARACTER) |
4ee9c684 | 3391 | { |
22d678e8 | 3392 | gcc_assert (lse->string_length != NULL_TREE |
4ee9c684 | 3393 | && rse->string_length != NULL_TREE); |
3394 | ||
3395 | gfc_conv_string_parameter (lse); | |
3396 | gfc_conv_string_parameter (rse); | |
3397 | ||
3398 | gfc_add_block_to_block (&block, &lse->pre); | |
3399 | gfc_add_block_to_block (&block, &rse->pre); | |
3400 | ||
dbe60343 | 3401 | gfc_trans_string_copy (&block, lse->string_length, lse->expr, |
3402 | rse->string_length, rse->expr); | |
4ee9c684 | 3403 | } |
2294b616 | 3404 | else if (ts.type == BT_DERIVED && ts.derived->attr.alloc_comp) |
3405 | { | |
3406 | cond = NULL_TREE; | |
3407 | ||
3408 | /* Are the rhs and the lhs the same? */ | |
3409 | if (r_is_var) | |
3410 | { | |
3411 | cond = fold_build2 (EQ_EXPR, boolean_type_node, | |
3412 | build_fold_addr_expr (lse->expr), | |
3413 | build_fold_addr_expr (rse->expr)); | |
3414 | cond = gfc_evaluate_now (cond, &lse->pre); | |
3415 | } | |
3416 | ||
3417 | /* Deallocate the lhs allocated components as long as it is not | |
3418 | the same as the rhs. */ | |
3419 | if (!l_is_temp) | |
3420 | { | |
3421 | tmp = gfc_deallocate_alloc_comp (ts.derived, lse->expr, 0); | |
3422 | if (r_is_var) | |
3423 | tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp); | |
3424 | gfc_add_expr_to_block (&lse->pre, tmp); | |
3425 | } | |
3426 | ||
3427 | gfc_add_block_to_block (&block, &lse->pre); | |
3428 | gfc_add_block_to_block (&block, &rse->pre); | |
3429 | ||
3430 | gfc_add_modify_expr (&block, lse->expr, | |
3431 | fold_convert (TREE_TYPE (lse->expr), rse->expr)); | |
3432 | ||
3433 | /* Do a deep copy if the rhs is a variable, if it is not the | |
540338c6 | 3434 | same as the lhs. */ |
2294b616 | 3435 | if (r_is_var) |
3436 | { | |
3437 | tmp = gfc_copy_alloc_comp (ts.derived, rse->expr, lse->expr, 0); | |
3438 | tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp); | |
3439 | gfc_add_expr_to_block (&block, tmp); | |
3440 | } | |
2294b616 | 3441 | } |
4ee9c684 | 3442 | else |
3443 | { | |
3444 | gfc_add_block_to_block (&block, &lse->pre); | |
3445 | gfc_add_block_to_block (&block, &rse->pre); | |
3446 | ||
260abd71 | 3447 | gfc_add_modify_expr (&block, lse->expr, |
3448 | fold_convert (TREE_TYPE (lse->expr), rse->expr)); | |
4ee9c684 | 3449 | } |
3450 | ||
3451 | gfc_add_block_to_block (&block, &lse->post); | |
3452 | gfc_add_block_to_block (&block, &rse->post); | |
3453 | ||
3454 | return gfc_finish_block (&block); | |
3455 | } | |
3456 | ||
3457 | ||
3458 | /* Try to translate array(:) = func (...), where func is a transformational | |
3459 | array function, without using a temporary. Returns NULL is this isn't the | |
3460 | case. */ | |
3461 | ||
3462 | static tree | |
3463 | gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2) | |
3464 | { | |
3465 | gfc_se se; | |
3466 | gfc_ss *ss; | |
70464f87 | 3467 | gfc_ref * ref; |
3468 | bool seen_array_ref; | |
4ee9c684 | 3469 | |
3470 | /* The caller has already checked rank>0 and expr_type == EXPR_FUNCTION. */ | |
3471 | if (expr2->value.function.isym && !gfc_is_intrinsic_libcall (expr2)) | |
3472 | return NULL; | |
3473 | ||
3474 | /* Elemental functions don't need a temporary anyway. */ | |
08349c53 | 3475 | if (expr2->value.function.esym != NULL |
3476 | && expr2->value.function.esym->attr.elemental) | |
4ee9c684 | 3477 | return NULL; |
3478 | ||
c99d633f | 3479 | /* Fail if EXPR1 can't be expressed as a descriptor. */ |
3480 | if (gfc_ref_needs_temporary_p (expr1->ref)) | |
3481 | return NULL; | |
3482 | ||
34da51b6 | 3483 | /* Functions returning pointers need temporaries. */ |
d4ef6f9d | 3484 | if (expr2->symtree->n.sym->attr.pointer |
3485 | || expr2->symtree->n.sym->attr.allocatable) | |
34da51b6 | 3486 | return NULL; |
3487 | ||
5065911e | 3488 | /* Character array functions need temporaries unless the |
3489 | character lengths are the same. */ | |
3490 | if (expr2->ts.type == BT_CHARACTER && expr2->rank > 0) | |
3491 | { | |
3492 | if (expr1->ts.cl->length == NULL | |
3493 | || expr1->ts.cl->length->expr_type != EXPR_CONSTANT) | |
3494 | return NULL; | |
3495 | ||
3496 | if (expr2->ts.cl->length == NULL | |
3497 | || expr2->ts.cl->length->expr_type != EXPR_CONSTANT) | |
3498 | return NULL; | |
3499 | ||
3500 | if (mpz_cmp (expr1->ts.cl->length->value.integer, | |
3501 | expr2->ts.cl->length->value.integer) != 0) | |
3502 | return NULL; | |
3503 | } | |
3504 | ||
70464f87 | 3505 | /* Check that no LHS component references appear during an array |
3506 | reference. This is needed because we do not have the means to | |
3507 | span any arbitrary stride with an array descriptor. This check | |
3508 | is not needed for the rhs because the function result has to be | |
3509 | a complete type. */ | |
3510 | seen_array_ref = false; | |
3511 | for (ref = expr1->ref; ref; ref = ref->next) | |
3512 | { | |
3513 | if (ref->type == REF_ARRAY) | |
3514 | seen_array_ref= true; | |
3515 | else if (ref->type == REF_COMPONENT && seen_array_ref) | |
3516 | return NULL; | |
3517 | } | |
3518 | ||
4ee9c684 | 3519 | /* Check for a dependency. */ |
018ef8b8 | 3520 | if (gfc_check_fncall_dependency (expr1, INTENT_OUT, |
3521 | expr2->value.function.esym, | |
3522 | expr2->value.function.actual)) | |
4ee9c684 | 3523 | return NULL; |
3524 | ||
3525 | /* The frontend doesn't seem to bother filling in expr->symtree for intrinsic | |
3526 | functions. */ | |
22d678e8 | 3527 | gcc_assert (expr2->value.function.isym |
e2293887 | 3528 | || (gfc_return_by_reference (expr2->value.function.esym) |
3529 | && expr2->value.function.esym->result->attr.dimension)); | |
4ee9c684 | 3530 | |
3531 | ss = gfc_walk_expr (expr1); | |
22d678e8 | 3532 | gcc_assert (ss != gfc_ss_terminator); |
4ee9c684 | 3533 | gfc_init_se (&se, NULL); |
3534 | gfc_start_block (&se.pre); | |
3535 | se.want_pointer = 1; | |
3536 | ||
3537 | gfc_conv_array_parameter (&se, expr1, ss, 0); | |
3538 | ||
3539 | se.direct_byref = 1; | |
3540 | se.ss = gfc_walk_expr (expr2); | |
22d678e8 | 3541 | gcc_assert (se.ss != gfc_ss_terminator); |
4ee9c684 | 3542 | gfc_conv_function_expr (&se, expr2); |
4ee9c684 | 3543 | gfc_add_block_to_block (&se.pre, &se.post); |
3544 | ||
3545 | return gfc_finish_block (&se.pre); | |
3546 | } | |
3547 | ||
67313c34 | 3548 | /* Determine whether the given EXPR_CONSTANT is a zero initializer. */ |
3549 | ||
3550 | static bool | |
3551 | is_zero_initializer_p (gfc_expr * expr) | |
3552 | { | |
3553 | if (expr->expr_type != EXPR_CONSTANT) | |
3554 | return false; | |
3555 | /* We ignore Hollerith constants for the time being. */ | |
3556 | if (expr->from_H) | |
3557 | return false; | |
3558 | ||
3559 | switch (expr->ts.type) | |
3560 | { | |
3561 | case BT_INTEGER: | |
3562 | return mpz_cmp_si (expr->value.integer, 0) == 0; | |
3563 | ||
3564 | case BT_REAL: | |
3565 | return mpfr_zero_p (expr->value.real) | |
3566 | && MPFR_SIGN (expr->value.real) >= 0; | |
3567 | ||
3568 | case BT_LOGICAL: | |
3569 | return expr->value.logical == 0; | |
3570 | ||
3571 | case BT_COMPLEX: | |
3572 | return mpfr_zero_p (expr->value.complex.r) | |
3573 | && MPFR_SIGN (expr->value.complex.r) >= 0 | |
3574 | && mpfr_zero_p (expr->value.complex.i) | |
3575 | && MPFR_SIGN (expr->value.complex.i) >= 0; | |
3576 | ||
3577 | default: | |
3578 | break; | |
3579 | } | |
3580 | return false; | |
3581 | } | |
3582 | ||
3583 | /* Try to efficiently translate array(:) = 0. Return NULL if this | |
3584 | can't be done. */ | |
3585 | ||
3586 | static tree | |
3587 | gfc_trans_zero_assign (gfc_expr * expr) | |
3588 | { | |
3589 | tree dest, len, type; | |
c2f47e15 | 3590 | tree tmp; |
67313c34 | 3591 | gfc_symbol *sym; |
3592 | ||
3593 | sym = expr->symtree->n.sym; | |
3594 | dest = gfc_get_symbol_decl (sym); | |
3595 | ||
3596 | type = TREE_TYPE (dest); | |
3597 | if (POINTER_TYPE_P (type)) | |
3598 | type = TREE_TYPE (type); | |
3599 | if (!GFC_ARRAY_TYPE_P (type)) | |
3600 | return NULL_TREE; | |
3601 | ||
3602 | /* Determine the length of the array. */ | |
3603 | len = GFC_TYPE_ARRAY_SIZE (type); | |
3604 | if (!len || TREE_CODE (len) != INTEGER_CST) | |
3605 | return NULL_TREE; | |
3606 | ||
3607 | len = fold_build2 (MULT_EXPR, gfc_array_index_type, len, | |
3608 | TYPE_SIZE_UNIT (gfc_get_element_type (type))); | |
3609 | ||
3610 | /* Convert arguments to the correct types. */ | |
3611 | if (!POINTER_TYPE_P (TREE_TYPE (dest))) | |
3612 | dest = gfc_build_addr_expr (pvoid_type_node, dest); | |
3613 | else | |
3614 | dest = fold_convert (pvoid_type_node, dest); | |
3615 | len = fold_convert (size_type_node, len); | |
3616 | ||
3617 | /* Construct call to __builtin_memset. */ | |
c2f47e15 | 3618 | tmp = build_call_expr (built_in_decls[BUILT_IN_MEMSET], |
3619 | 3, dest, integer_zero_node, len); | |
67313c34 | 3620 | return fold_convert (void_type_node, tmp); |
3621 | } | |
4ee9c684 | 3622 | |
538374c5 | 3623 | |
3624 | /* Helper for gfc_trans_array_copy and gfc_trans_array_constructor_copy | |
3625 | that constructs the call to __builtin_memcpy. */ | |
3626 | ||
3627 | static tree | |
3628 | gfc_build_memcpy_call (tree dst, tree src, tree len) | |
3629 | { | |
c2f47e15 | 3630 | tree tmp; |
538374c5 | 3631 | |
3632 | /* Convert arguments to the correct types. */ | |
3633 | if (!POINTER_TYPE_P (TREE_TYPE (dst))) | |
3634 | dst = gfc_build_addr_expr (pvoid_type_node, dst); | |
3635 | else | |
3636 | dst = fold_convert (pvoid_type_node, dst); | |
3637 | ||
3638 | if (!POINTER_TYPE_P (TREE_TYPE (src))) | |
3639 | src = gfc_build_addr_expr (pvoid_type_node, src); | |
3640 | else | |
3641 | src = fold_convert (pvoid_type_node, src); | |
3642 | ||
3643 | len = fold_convert (size_type_node, len); | |
3644 | ||
3645 | /* Construct call to __builtin_memcpy. */ | |
c2f47e15 | 3646 | tmp = build_call_expr (built_in_decls[BUILT_IN_MEMCPY], 3, dst, src, len); |
538374c5 | 3647 | return fold_convert (void_type_node, tmp); |
3648 | } | |
3649 | ||
3650 | ||
1372ec9a | 3651 | /* Try to efficiently translate dst(:) = src(:). Return NULL if this |
3652 | can't be done. EXPR1 is the destination/lhs and EXPR2 is the | |
3653 | source/rhs, both are gfc_full_array_ref_p which have been checked for | |
3654 | dependencies. */ | |
4ee9c684 | 3655 | |
1372ec9a | 3656 | static tree |
3657 | gfc_trans_array_copy (gfc_expr * expr1, gfc_expr * expr2) | |
3658 | { | |
3659 | tree dst, dlen, dtype; | |
3660 | tree src, slen, stype; | |
1372ec9a | 3661 | |
3662 | dst = gfc_get_symbol_decl (expr1->symtree->n.sym); | |
3663 | src = gfc_get_symbol_decl (expr2->symtree->n.sym); | |
3664 | ||
3665 | dtype = TREE_TYPE (dst); | |
3666 | if (POINTER_TYPE_P (dtype)) | |
3667 | dtype = TREE_TYPE (dtype); | |
3668 | stype = TREE_TYPE (src); | |
3669 | if (POINTER_TYPE_P (stype)) | |
3670 | stype = TREE_TYPE (stype); | |
3671 | ||
3672 | if (!GFC_ARRAY_TYPE_P (dtype) || !GFC_ARRAY_TYPE_P (stype)) | |
3673 | return NULL_TREE; | |
3674 | ||
3675 | /* Determine the lengths of the arrays. */ | |
3676 | dlen = GFC_TYPE_ARRAY_SIZE (dtype); | |
3677 | if (!dlen || TREE_CODE (dlen) != INTEGER_CST) | |
3678 | return NULL_TREE; | |
3679 | dlen = fold_build2 (MULT_EXPR, gfc_array_index_type, dlen, | |
3680 | TYPE_SIZE_UNIT (gfc_get_element_type (dtype))); | |
3681 | ||
3682 | slen = GFC_TYPE_ARRAY_SIZE (stype); | |
3683 | if (!slen || TREE_CODE (slen) != INTEGER_CST) | |
3684 | return NULL_TREE; | |
3685 | slen = fold_build2 (MULT_EXPR, gfc_array_index_type, slen, | |
3686 | TYPE_SIZE_UNIT (gfc_get_element_type (stype))); | |
3687 | ||
3688 | /* Sanity check that they are the same. This should always be | |
3689 | the case, as we should already have checked for conformance. */ | |
3690 | if (!tree_int_cst_equal (slen, dlen)) | |
3691 | return NULL_TREE; | |
3692 | ||
538374c5 | 3693 | return gfc_build_memcpy_call (dst, src, dlen); |
3694 | } | |
1372ec9a | 3695 | |
1372ec9a | 3696 | |
538374c5 | 3697 | /* Try to efficiently translate array(:) = (/ ... /). Return NULL if |
3698 | this can't be done. EXPR1 is the destination/lhs for which | |
3699 | gfc_full_array_ref_p is true, and EXPR2 is the source/rhs. */ | |
1372ec9a | 3700 | |
538374c5 | 3701 | static tree |
3702 | gfc_trans_array_constructor_copy (gfc_expr * expr1, gfc_expr * expr2) | |
3703 | { | |
3704 | unsigned HOST_WIDE_INT nelem; | |
3705 | tree dst, dtype; | |
3706 | tree src, stype; | |
3707 | tree len; | |
3708 | ||
3709 | nelem = gfc_constant_array_constructor_p (expr2->value.constructor); | |
3710 | if (nelem == 0) | |
3711 | return NULL_TREE; | |
3712 | ||
3713 | dst = gfc_get_symbol_decl (expr1->symtree->n.sym); | |
3714 | dtype = TREE_TYPE (dst); | |
3715 | if (POINTER_TYPE_P (dtype)) | |
3716 | dtype = TREE_TYPE (dtype); | |
3717 | if (!GFC_ARRAY_TYPE_P (dtype)) | |
3718 | return NULL_TREE; | |
3719 | ||
3720 | /* Determine the lengths of the array. */ | |
3721 | len = GFC_TYPE_ARRAY_SIZE (dtype); | |
3722 | if (!len || TREE_CODE (len) != INTEGER_CST) | |
3723 | return NULL_TREE; | |
3724 | ||
3725 | /* Confirm that the constructor is the same size. */ | |
3726 | if (compare_tree_int (len, nelem) != 0) | |
3727 | return NULL_TREE; | |
3728 | ||
3729 | len = fold_build2 (MULT_EXPR, gfc_array_index_type, len, | |
3730 | TYPE_SIZE_UNIT (gfc_get_element_type (dtype))); | |
3731 | ||
3732 | stype = gfc_typenode_for_spec (&expr2->ts); | |
3733 | src = gfc_build_constant_array_constructor (expr2, stype); | |
3734 | ||
3735 | stype = TREE_TYPE (src); | |
3736 | if (POINTER_TYPE_P (stype)) | |
3737 | stype = TREE_TYPE (stype); | |
3738 | ||
3739 | return gfc_build_memcpy_call (dst, src, len); | |
1372ec9a | 3740 | } |
3741 | ||
3742 | ||
3743 | /* Subroutine of gfc_trans_assignment that actually scalarizes the | |
3744 | assignment. EXPR1 is the destination/RHS and EXPR2 is the source/LHS. */ | |
3745 | ||
3746 | static tree | |
3747 | gfc_trans_assignment_1 (gfc_expr * expr1, gfc_expr * expr2, bool init_flag) | |
4ee9c684 | 3748 | { |
3749 | gfc_se lse; | |
3750 | gfc_se rse; | |
3751 | gfc_ss *lss; | |
3752 | gfc_ss *lss_section; | |
3753 | gfc_ss *rss; | |
3754 | gfc_loopinfo loop; | |
3755 | tree tmp; | |
3756 | stmtblock_t block; | |
3757 | stmtblock_t body; | |
2294b616 | 3758 | bool l_is_temp; |
4ee9c684 | 3759 | |
4ee9c684 | 3760 | /* Assignment of the form lhs = rhs. */ |
3761 | gfc_start_block (&block); | |
3762 | ||
3763 | gfc_init_se (&lse, NULL); | |
3764 | gfc_init_se (&rse, NULL); | |
3765 | ||
3766 | /* Walk the lhs. */ | |
3767 | lss = gfc_walk_expr (expr1); | |
3768 | rss = NULL; | |
3769 | if (lss != gfc_ss_terminator) | |
3770 | { | |
3771 | /* The assignment needs scalarization. */ | |
3772 | lss_section = lss; | |
3773 | ||
3774 | /* Find a non-scalar SS from the lhs. */ | |
3775 | while (lss_section != gfc_ss_terminator | |
3776 | && lss_section->type != GFC_SS_SECTION) | |
3777 | lss_section = lss_section->next; | |
3778 | ||
22d678e8 | 3779 | gcc_assert (lss_section != gfc_ss_terminator); |
4ee9c684 | 3780 | |
3781 | /* Initialize the scalarizer. */ | |
3782 | gfc_init_loopinfo (&loop); | |
3783 | ||
3784 | /* Walk the rhs. */ | |
3785 | rss = gfc_walk_expr (expr2); | |
3786 | if (rss == gfc_ss_terminator) | |
3787 | { | |
3788 | /* The rhs is scalar. Add a ss for the expression. */ | |
3789 | rss = gfc_get_ss (); | |
3790 | rss->next = gfc_ss_terminator; | |
3791 | rss->type = GFC_SS_SCALAR; | |
3792 | rss->expr = expr2; | |
3793 | } | |
3794 | /* Associate the SS with the loop. */ | |
3795 | gfc_add_ss_to_loop (&loop, lss); | |
3796 | gfc_add_ss_to_loop (&loop, rss); | |
3797 | ||
3798 | /* Calculate the bounds of the scalarization. */ | |
3799 | gfc_conv_ss_startstride (&loop); | |
3800 | /* Resolve any data dependencies in the statement. */ | |
376a3611 | 3801 | gfc_conv_resolve_dependencies (&loop, lss, rss); |
4ee9c684 | 3802 | /* Setup the scalarizing loops. */ |
3803 | gfc_conv_loop_setup (&loop); | |
3804 | ||
3805 | /* Setup the gfc_se structures. */ | |
3806 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
3807 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
3808 | ||
3809 | rse.ss = rss; | |
3810 | gfc_mark_ss_chain_used (rss, 1); | |
3811 | if (loop.temp_ss == NULL) | |
3812 | { | |
3813 | lse.ss = lss; | |
3814 | gfc_mark_ss_chain_used (lss, 1); | |
3815 | } | |
3816 | else | |
3817 | { | |
3818 | lse.ss = loop.temp_ss; | |
3819 | gfc_mark_ss_chain_used (lss, 3); | |
3820 | gfc_mark_ss_chain_used (loop.temp_ss, 3); | |
3821 | } | |
3822 | ||
3823 | /* Start the scalarized loop body. */ | |
3824 | gfc_start_scalarized_body (&loop, &body); | |
3825 | } | |
3826 | else | |
3827 | gfc_init_block (&body); | |
3828 | ||
2294b616 | 3829 | l_is_temp = (lss != gfc_ss_terminator && loop.temp_ss != NULL); |
3830 | ||
4ee9c684 | 3831 | /* Translate the expression. */ |
3832 | gfc_conv_expr (&rse, expr2); | |
3833 | ||
2294b616 | 3834 | if (l_is_temp) |
4ee9c684 | 3835 | { |
3836 | gfc_conv_tmp_array_ref (&lse); | |
3837 | gfc_advance_se_ss_chain (&lse); | |
3838 | } | |
3839 | else | |
3840 | gfc_conv_expr (&lse, expr1); | |
544c333b | 3841 | |
b9cd8c56 | 3842 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts, |
3843 | l_is_temp || init_flag, | |
2294b616 | 3844 | expr2->expr_type == EXPR_VARIABLE); |
4ee9c684 | 3845 | gfc_add_expr_to_block (&body, tmp); |
3846 | ||
3847 | if (lss == gfc_ss_terminator) | |
3848 | { | |
3849 | /* Use the scalar assignment as is. */ | |
3850 | gfc_add_block_to_block (&block, &body); | |
3851 | } | |
3852 | else | |
3853 | { | |
22d678e8 | 3854 | gcc_assert (lse.ss == gfc_ss_terminator |
3855 | && rse.ss == gfc_ss_terminator); | |
4ee9c684 | 3856 | |
2294b616 | 3857 | if (l_is_temp) |
4ee9c684 | 3858 | { |
3859 | gfc_trans_scalarized_loop_boundary (&loop, &body); | |
3860 | ||
3861 | /* We need to copy the temporary to the actual lhs. */ | |
3862 | gfc_init_se (&lse, NULL); | |
3863 | gfc_init_se (&rse, NULL); | |
3864 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
3865 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
3866 | ||
3867 | rse.ss = loop.temp_ss; | |
3868 | lse.ss = lss; | |
3869 | ||
3870 | gfc_conv_tmp_array_ref (&rse); | |
3871 | gfc_advance_se_ss_chain (&rse); | |
3872 | gfc_conv_expr (&lse, expr1); | |
3873 | ||
22d678e8 | 3874 | gcc_assert (lse.ss == gfc_ss_terminator |
3875 | && rse.ss == gfc_ss_terminator); | |
4ee9c684 | 3876 | |
b9cd8c56 | 3877 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts, |
3878 | false, false); | |
4ee9c684 | 3879 | gfc_add_expr_to_block (&body, tmp); |
3880 | } | |
2294b616 | 3881 | |
4ee9c684 | 3882 | /* Generate the copying loops. */ |
3883 | gfc_trans_scalarizing_loops (&loop, &body); | |
3884 | ||
3885 | /* Wrap the whole thing up. */ | |
3886 | gfc_add_block_to_block (&block, &loop.pre); | |
3887 | gfc_add_block_to_block (&block, &loop.post); | |
3888 | ||
3889 | gfc_cleanup_loop (&loop); | |
3890 | } | |
3891 | ||
3892 | return gfc_finish_block (&block); | |
3893 | } | |
3894 | ||
1372ec9a | 3895 | |
3896 | /* Check whether EXPR, which is an EXPR_VARIABLE, is a copyable array. */ | |
3897 | ||
3898 | static bool | |
3899 | copyable_array_p (gfc_expr * expr) | |
3900 | { | |
3901 | /* First check it's an array. */ | |
3902 | if (expr->rank < 1 || !expr->ref) | |
3903 | return false; | |
3904 | ||
3905 | /* Next check that it's of a simple enough type. */ | |
3906 | switch (expr->ts.type) | |
3907 | { | |
3908 | case BT_INTEGER: | |
3909 | case BT_REAL: | |
3910 | case BT_COMPLEX: | |
3911 | case BT_LOGICAL: | |
3912 | return true; | |
3913 | ||
6fc8b651 | 3914 | case BT_CHARACTER: |
3915 | return false; | |
3916 | ||
3917 | case BT_DERIVED: | |
3918 | return !expr->ts.derived->attr.alloc_comp; | |
3919 | ||
1372ec9a | 3920 | default: |
3921 | break; | |
3922 | } | |
3923 | ||
3924 | return false; | |
3925 | } | |
3926 | ||
3927 | /* Translate an assignment. */ | |
3928 | ||
3929 | tree | |
3930 | gfc_trans_assignment (gfc_expr * expr1, gfc_expr * expr2, bool init_flag) | |
3931 | { | |
3932 | tree tmp; | |
3933 | ||
3934 | /* Special case a single function returning an array. */ | |
3935 | if (expr2->expr_type == EXPR_FUNCTION && expr2->rank > 0) | |
3936 | { | |
3937 | tmp = gfc_trans_arrayfunc_assign (expr1, expr2); | |
3938 | if (tmp) | |
3939 | return tmp; | |
3940 | } | |
3941 | ||
3942 | /* Special case assigning an array to zero. */ | |
3943 | if (expr1->expr_type == EXPR_VARIABLE | |
3944 | && expr1->rank > 0 | |
3945 | && expr1->ref | |
752e69df | 3946 | && expr1->ref->next == NULL |
1372ec9a | 3947 | && gfc_full_array_ref_p (expr1->ref) |
3948 | && is_zero_initializer_p (expr2)) | |
3949 | { | |
3950 | tmp = gfc_trans_zero_assign (expr1); | |
3951 | if (tmp) | |
3952 | return tmp; | |
3953 | } | |
3954 | ||
3955 | /* Special case copying one array to another. */ | |
3956 | if (expr1->expr_type == EXPR_VARIABLE | |
3957 | && copyable_array_p (expr1) | |
3958 | && gfc_full_array_ref_p (expr1->ref) | |
3959 | && expr2->expr_type == EXPR_VARIABLE | |
3960 | && copyable_array_p (expr2) | |
3961 | && gfc_full_array_ref_p (expr2->ref) | |
3962 | && gfc_compare_types (&expr1->ts, &expr2->ts) | |
3963 | && !gfc_check_dependency (expr1, expr2, 0)) | |
3964 | { | |
3965 | tmp = gfc_trans_array_copy (expr1, expr2); | |
3966 | if (tmp) | |
3967 | return tmp; | |
3968 | } | |
3969 | ||
538374c5 | 3970 | /* Special case initializing an array from a constant array constructor. */ |
3971 | if (expr1->expr_type == EXPR_VARIABLE | |
3972 | && copyable_array_p (expr1) | |
3973 | && gfc_full_array_ref_p (expr1->ref) | |
3974 | && expr2->expr_type == EXPR_ARRAY | |
3975 | && gfc_compare_types (&expr1->ts, &expr2->ts)) | |
3976 | { | |
3977 | tmp = gfc_trans_array_constructor_copy (expr1, expr2); | |
3978 | if (tmp) | |
3979 | return tmp; | |
3980 | } | |
3981 | ||
1372ec9a | 3982 | /* Fallback to the scalarizer to generate explicit loops. */ |
3983 | return gfc_trans_assignment_1 (expr1, expr2, init_flag); | |
3984 | } | |
3985 | ||
b9cd8c56 | 3986 | tree |
3987 | gfc_trans_init_assign (gfc_code * code) | |
3988 | { | |
3989 | return gfc_trans_assignment (code->expr, code->expr2, true); | |
3990 | } | |
3991 | ||
4ee9c684 | 3992 | tree |
3993 | gfc_trans_assign (gfc_code * code) | |
3994 | { | |
b9cd8c56 | 3995 | return gfc_trans_assignment (code->expr, code->expr2, false); |
4ee9c684 | 3996 | } |