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4ee9c684 | 1 | /* Expression translation |
55aef564 | 2 | Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
4ee9c684 | 3 | Contributed by Paul Brook <paul@nowt.org> |
4 | and Steven Bosscher <s.bosscher@student.tudelft.nl> | |
5 | ||
c84b470d | 6 | This file is part of GCC. |
4ee9c684 | 7 | |
c84b470d | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
4ee9c684 | 12 | |
c84b470d | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
4ee9c684 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
c84b470d | 19 | along with GCC; see the file COPYING. If not, write to the Free |
30d4ffea | 20 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
4ee9c684 | 22 | |
23 | /* trans-expr.c-- generate GENERIC trees for gfc_expr. */ | |
24 | ||
25 | #include "config.h" | |
26 | #include "system.h" | |
27 | #include "coretypes.h" | |
28 | #include "tree.h" | |
29 | #include "convert.h" | |
4ee9c684 | 30 | #include "ggc.h" |
31 | #include "toplev.h" | |
32 | #include "real.h" | |
88bce636 | 33 | #include "tree-gimple.h" |
4ee9c684 | 34 | #include "flags.h" |
4ee9c684 | 35 | #include "gfortran.h" |
36 | #include "trans.h" | |
37 | #include "trans-const.h" | |
38 | #include "trans-types.h" | |
39 | #include "trans-array.h" | |
40 | /* Only for gfc_trans_assign and gfc_trans_pointer_assign. */ | |
41 | #include "trans-stmt.h" | |
c99d633f | 42 | #include "dependency.h" |
4ee9c684 | 43 | |
9a0aec1d | 44 | static tree gfc_trans_structure_assign (tree dest, gfc_expr * expr); |
f45a476e | 45 | static void gfc_apply_interface_mapping_to_expr (gfc_interface_mapping *, |
46 | gfc_expr *); | |
4ee9c684 | 47 | |
48 | /* Copy the scalarization loop variables. */ | |
49 | ||
50 | static void | |
51 | gfc_copy_se_loopvars (gfc_se * dest, gfc_se * src) | |
52 | { | |
53 | dest->ss = src->ss; | |
54 | dest->loop = src->loop; | |
55 | } | |
56 | ||
57 | ||
f888a3fb | 58 | /* Initialize a simple expression holder. |
4ee9c684 | 59 | |
60 | Care must be taken when multiple se are created with the same parent. | |
61 | The child se must be kept in sync. The easiest way is to delay creation | |
62 | of a child se until after after the previous se has been translated. */ | |
63 | ||
64 | void | |
65 | gfc_init_se (gfc_se * se, gfc_se * parent) | |
66 | { | |
67 | memset (se, 0, sizeof (gfc_se)); | |
68 | gfc_init_block (&se->pre); | |
69 | gfc_init_block (&se->post); | |
70 | ||
71 | se->parent = parent; | |
72 | ||
73 | if (parent) | |
74 | gfc_copy_se_loopvars (se, parent); | |
75 | } | |
76 | ||
77 | ||
78 | /* Advances to the next SS in the chain. Use this rather than setting | |
f888a3fb | 79 | se->ss = se->ss->next because all the parents needs to be kept in sync. |
4ee9c684 | 80 | See gfc_init_se. */ |
81 | ||
82 | void | |
83 | gfc_advance_se_ss_chain (gfc_se * se) | |
84 | { | |
85 | gfc_se *p; | |
86 | ||
22d678e8 | 87 | gcc_assert (se != NULL && se->ss != NULL && se->ss != gfc_ss_terminator); |
4ee9c684 | 88 | |
89 | p = se; | |
90 | /* Walk down the parent chain. */ | |
91 | while (p != NULL) | |
92 | { | |
f888a3fb | 93 | /* Simple consistency check. */ |
22d678e8 | 94 | gcc_assert (p->parent == NULL || p->parent->ss == p->ss); |
4ee9c684 | 95 | |
96 | p->ss = p->ss->next; | |
97 | ||
98 | p = p->parent; | |
99 | } | |
100 | } | |
101 | ||
102 | ||
103 | /* Ensures the result of the expression as either a temporary variable | |
104 | or a constant so that it can be used repeatedly. */ | |
105 | ||
106 | void | |
107 | gfc_make_safe_expr (gfc_se * se) | |
108 | { | |
109 | tree var; | |
110 | ||
ce45a448 | 111 | if (CONSTANT_CLASS_P (se->expr)) |
4ee9c684 | 112 | return; |
113 | ||
f888a3fb | 114 | /* We need a temporary for this result. */ |
4ee9c684 | 115 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); |
116 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
117 | se->expr = var; | |
118 | } | |
119 | ||
120 | ||
5cb9d0d8 | 121 | /* Return an expression which determines if a dummy parameter is present. |
122 | Also used for arguments to procedures with multiple entry points. */ | |
4ee9c684 | 123 | |
124 | tree | |
125 | gfc_conv_expr_present (gfc_symbol * sym) | |
126 | { | |
127 | tree decl; | |
128 | ||
5cb9d0d8 | 129 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 130 | |
131 | decl = gfc_get_symbol_decl (sym); | |
132 | if (TREE_CODE (decl) != PARM_DECL) | |
133 | { | |
134 | /* Array parameters use a temporary descriptor, we want the real | |
135 | parameter. */ | |
22d678e8 | 136 | gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (decl)) |
4ee9c684 | 137 | || GFC_ARRAY_TYPE_P (TREE_TYPE (decl))); |
138 | decl = GFC_DECL_SAVED_DESCRIPTOR (decl); | |
139 | } | |
ed52ef8b | 140 | return build2 (NE_EXPR, boolean_type_node, decl, |
141 | fold_convert (TREE_TYPE (decl), null_pointer_node)); | |
4ee9c684 | 142 | } |
143 | ||
144 | ||
bd24f178 | 145 | /* Converts a missing, dummy argument into a null or zero. */ |
146 | ||
147 | void | |
148 | gfc_conv_missing_dummy (gfc_se * se, gfc_expr * arg, gfc_typespec ts) | |
149 | { | |
150 | tree present; | |
151 | tree tmp; | |
152 | ||
153 | present = gfc_conv_expr_present (arg->symtree->n.sym); | |
154 | tmp = build3 (COND_EXPR, TREE_TYPE (se->expr), present, se->expr, | |
155 | convert (TREE_TYPE (se->expr), integer_zero_node)); | |
156 | tmp = gfc_evaluate_now (tmp, &se->pre); | |
157 | se->expr = tmp; | |
158 | if (ts.type == BT_CHARACTER) | |
159 | { | |
160 | tmp = convert (gfc_charlen_type_node, integer_zero_node); | |
161 | tmp = build3 (COND_EXPR, gfc_charlen_type_node, present, | |
162 | se->string_length, tmp); | |
163 | tmp = gfc_evaluate_now (tmp, &se->pre); | |
164 | se->string_length = tmp; | |
165 | } | |
166 | return; | |
167 | } | |
168 | ||
169 | ||
6bf678b8 | 170 | /* Get the character length of an expression, looking through gfc_refs |
171 | if necessary. */ | |
172 | ||
173 | tree | |
174 | gfc_get_expr_charlen (gfc_expr *e) | |
175 | { | |
176 | gfc_ref *r; | |
177 | tree length; | |
178 | ||
179 | gcc_assert (e->expr_type == EXPR_VARIABLE | |
180 | && e->ts.type == BT_CHARACTER); | |
181 | ||
182 | length = NULL; /* To silence compiler warning. */ | |
183 | ||
184 | /* First candidate: if the variable is of type CHARACTER, the | |
185 | expression's length could be the length of the character | |
b14e2757 | 186 | variable. */ |
6bf678b8 | 187 | if (e->symtree->n.sym->ts.type == BT_CHARACTER) |
188 | length = e->symtree->n.sym->ts.cl->backend_decl; | |
189 | ||
190 | /* Look through the reference chain for component references. */ | |
191 | for (r = e->ref; r; r = r->next) | |
192 | { | |
193 | switch (r->type) | |
194 | { | |
195 | case REF_COMPONENT: | |
196 | if (r->u.c.component->ts.type == BT_CHARACTER) | |
197 | length = r->u.c.component->ts.cl->backend_decl; | |
198 | break; | |
199 | ||
200 | case REF_ARRAY: | |
201 | /* Do nothing. */ | |
202 | break; | |
203 | ||
204 | default: | |
205 | /* We should never got substring references here. These will be | |
206 | broken down by the scalarizer. */ | |
207 | gcc_unreachable (); | |
208 | } | |
209 | } | |
210 | ||
211 | gcc_assert (length != NULL); | |
212 | return length; | |
213 | } | |
214 | ||
215 | ||
216 | ||
4ee9c684 | 217 | /* Generate code to initialize a string length variable. Returns the |
218 | value. */ | |
219 | ||
220 | void | |
221 | gfc_trans_init_string_length (gfc_charlen * cl, stmtblock_t * pblock) | |
222 | { | |
223 | gfc_se se; | |
224 | tree tmp; | |
225 | ||
226 | gfc_init_se (&se, NULL); | |
9ad09405 | 227 | gfc_conv_expr_type (&se, cl->length, gfc_charlen_type_node); |
4ee9c684 | 228 | gfc_add_block_to_block (pblock, &se.pre); |
229 | ||
230 | tmp = cl->backend_decl; | |
231 | gfc_add_modify_expr (pblock, tmp, se.expr); | |
232 | } | |
233 | ||
f888a3fb | 234 | |
4ee9c684 | 235 | static void |
236 | gfc_conv_substring (gfc_se * se, gfc_ref * ref, int kind) | |
237 | { | |
238 | tree tmp; | |
239 | tree type; | |
240 | tree var; | |
241 | gfc_se start; | |
242 | gfc_se end; | |
243 | ||
244 | type = gfc_get_character_type (kind, ref->u.ss.length); | |
245 | type = build_pointer_type (type); | |
246 | ||
247 | var = NULL_TREE; | |
248 | gfc_init_se (&start, se); | |
9ad09405 | 249 | gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node); |
4ee9c684 | 250 | gfc_add_block_to_block (&se->pre, &start.pre); |
251 | ||
252 | if (integer_onep (start.expr)) | |
260abd71 | 253 | gfc_conv_string_parameter (se); |
4ee9c684 | 254 | else |
255 | { | |
256 | /* Change the start of the string. */ | |
257 | if (TYPE_STRING_FLAG (TREE_TYPE (se->expr))) | |
258 | tmp = se->expr; | |
259 | else | |
4fa2c167 | 260 | tmp = build_fold_indirect_ref (se->expr); |
4ee9c684 | 261 | tmp = gfc_build_array_ref (tmp, start.expr); |
262 | se->expr = gfc_build_addr_expr (type, tmp); | |
263 | } | |
264 | ||
265 | /* Length = end + 1 - start. */ | |
266 | gfc_init_se (&end, se); | |
267 | if (ref->u.ss.end == NULL) | |
268 | end.expr = se->string_length; | |
269 | else | |
270 | { | |
9ad09405 | 271 | gfc_conv_expr_type (&end, ref->u.ss.end, gfc_charlen_type_node); |
4ee9c684 | 272 | gfc_add_block_to_block (&se->pre, &end.pre); |
273 | } | |
ce825331 | 274 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, |
275 | build_int_cst (gfc_charlen_type_node, 1), | |
276 | start.expr); | |
277 | tmp = fold_build2 (PLUS_EXPR, gfc_charlen_type_node, end.expr, tmp); | |
278 | se->string_length = tmp; | |
4ee9c684 | 279 | } |
280 | ||
281 | ||
282 | /* Convert a derived type component reference. */ | |
283 | ||
284 | static void | |
285 | gfc_conv_component_ref (gfc_se * se, gfc_ref * ref) | |
286 | { | |
287 | gfc_component *c; | |
288 | tree tmp; | |
289 | tree decl; | |
290 | tree field; | |
291 | ||
292 | c = ref->u.c.component; | |
293 | ||
22d678e8 | 294 | gcc_assert (c->backend_decl); |
4ee9c684 | 295 | |
296 | field = c->backend_decl; | |
22d678e8 | 297 | gcc_assert (TREE_CODE (field) == FIELD_DECL); |
4ee9c684 | 298 | decl = se->expr; |
ed52ef8b | 299 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE); |
4ee9c684 | 300 | |
301 | se->expr = tmp; | |
302 | ||
303 | if (c->ts.type == BT_CHARACTER) | |
304 | { | |
305 | tmp = c->ts.cl->backend_decl; | |
7949cb07 | 306 | /* Components must always be constant length. */ |
22d678e8 | 307 | gcc_assert (tmp && INTEGER_CST_P (tmp)); |
4ee9c684 | 308 | se->string_length = tmp; |
309 | } | |
310 | ||
dc5fe211 | 311 | if (c->pointer && c->dimension == 0 && c->ts.type != BT_CHARACTER) |
4fa2c167 | 312 | se->expr = build_fold_indirect_ref (se->expr); |
4ee9c684 | 313 | } |
314 | ||
315 | ||
316 | /* Return the contents of a variable. Also handles reference/pointer | |
317 | variables (all Fortran pointer references are implicit). */ | |
318 | ||
319 | static void | |
320 | gfc_conv_variable (gfc_se * se, gfc_expr * expr) | |
321 | { | |
322 | gfc_ref *ref; | |
323 | gfc_symbol *sym; | |
c750cc52 | 324 | tree parent_decl; |
325 | int parent_flag; | |
326 | bool return_value; | |
327 | bool alternate_entry; | |
328 | bool entry_master; | |
4ee9c684 | 329 | |
330 | sym = expr->symtree->n.sym; | |
331 | if (se->ss != NULL) | |
332 | { | |
333 | /* Check that something hasn't gone horribly wrong. */ | |
22d678e8 | 334 | gcc_assert (se->ss != gfc_ss_terminator); |
335 | gcc_assert (se->ss->expr == expr); | |
4ee9c684 | 336 | |
337 | /* A scalarized term. We already know the descriptor. */ | |
338 | se->expr = se->ss->data.info.descriptor; | |
7949cb07 | 339 | se->string_length = se->ss->string_length; |
598d8efb | 340 | for (ref = se->ss->data.info.ref; ref; ref = ref->next) |
341 | if (ref->type == REF_ARRAY && ref->u.ar.type != AR_ELEMENT) | |
342 | break; | |
4ee9c684 | 343 | } |
344 | else | |
345 | { | |
c6871095 | 346 | tree se_expr = NULL_TREE; |
347 | ||
b7bf3f81 | 348 | se->expr = gfc_get_symbol_decl (sym); |
4ee9c684 | 349 | |
c750cc52 | 350 | /* Deal with references to a parent results or entries by storing |
351 | the current_function_decl and moving to the parent_decl. */ | |
c750cc52 | 352 | return_value = sym->attr.function && sym->result == sym; |
353 | alternate_entry = sym->attr.function && sym->attr.entry | |
b01f72f3 | 354 | && sym->result == sym; |
c750cc52 | 355 | entry_master = sym->attr.result |
b01f72f3 | 356 | && sym->ns->proc_name->attr.entry_master |
357 | && !gfc_return_by_reference (sym->ns->proc_name); | |
c750cc52 | 358 | parent_decl = DECL_CONTEXT (current_function_decl); |
359 | ||
360 | if ((se->expr == parent_decl && return_value) | |
b01f72f3 | 361 | || (sym->ns && sym->ns->proc_name |
362 | && sym->ns->proc_name->backend_decl == parent_decl | |
363 | && (alternate_entry || entry_master))) | |
c750cc52 | 364 | parent_flag = 1; |
365 | else | |
366 | parent_flag = 0; | |
367 | ||
c6871095 | 368 | /* Special case for assigning the return value of a function. |
369 | Self recursive functions must have an explicit return value. */ | |
b01f72f3 | 370 | if (return_value && (se->expr == current_function_decl || parent_flag)) |
c750cc52 | 371 | se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
c6871095 | 372 | |
373 | /* Similarly for alternate entry points. */ | |
c750cc52 | 374 | else if (alternate_entry |
b01f72f3 | 375 | && (sym->ns->proc_name->backend_decl == current_function_decl |
376 | || parent_flag)) | |
c6871095 | 377 | { |
378 | gfc_entry_list *el = NULL; | |
379 | ||
380 | for (el = sym->ns->entries; el; el = el->next) | |
381 | if (sym == el->sym) | |
382 | { | |
c750cc52 | 383 | se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
c6871095 | 384 | break; |
385 | } | |
386 | } | |
387 | ||
c750cc52 | 388 | else if (entry_master |
b01f72f3 | 389 | && (sym->ns->proc_name->backend_decl == current_function_decl |
390 | || parent_flag)) | |
c750cc52 | 391 | se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
c6871095 | 392 | |
393 | if (se_expr) | |
394 | se->expr = se_expr; | |
395 | ||
4ee9c684 | 396 | /* Procedure actual arguments. */ |
c6871095 | 397 | else if (sym->attr.flavor == FL_PROCEDURE |
398 | && se->expr != current_function_decl) | |
4ee9c684 | 399 | { |
22d678e8 | 400 | gcc_assert (se->want_pointer); |
4ee9c684 | 401 | if (!sym->attr.dummy) |
402 | { | |
22d678e8 | 403 | gcc_assert (TREE_CODE (se->expr) == FUNCTION_DECL); |
9596685a | 404 | se->expr = build_fold_addr_expr (se->expr); |
4ee9c684 | 405 | } |
406 | return; | |
544c333b | 407 | } |
408 | ||
409 | ||
410 | /* Dereference the expression, where needed. Since characters | |
411 | are entirely different from other types, they are treated | |
412 | separately. */ | |
413 | if (sym->ts.type == BT_CHARACTER) | |
414 | { | |
415 | /* Dereference character pointer dummy arguments | |
bf7e666b | 416 | or results. */ |
544c333b | 417 | if ((sym->attr.pointer || sym->attr.allocatable) |
4442ee19 | 418 | && (sym->attr.dummy |
419 | || sym->attr.function | |
420 | || sym->attr.result)) | |
4fa2c167 | 421 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 422 | } |
423 | else | |
424 | { | |
747a9f62 | 425 | /* Dereference non-character scalar dummy arguments. */ |
4442ee19 | 426 | if (sym->attr.dummy && !sym->attr.dimension) |
4fa2c167 | 427 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 428 | |
bf7e666b | 429 | /* Dereference scalar hidden result. */ |
4442ee19 | 430 | if (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX |
544c333b | 431 | && (sym->attr.function || sym->attr.result) |
ea346118 | 432 | && !sym->attr.dimension && !sym->attr.pointer) |
4fa2c167 | 433 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 434 | |
435 | /* Dereference non-character pointer variables. | |
747a9f62 | 436 | These must be dummies, results, or scalars. */ |
544c333b | 437 | if ((sym->attr.pointer || sym->attr.allocatable) |
4442ee19 | 438 | && (sym->attr.dummy |
439 | || sym->attr.function | |
440 | || sym->attr.result | |
441 | || !sym->attr.dimension)) | |
4fa2c167 | 442 | se->expr = build_fold_indirect_ref (se->expr); |
544c333b | 443 | } |
444 | ||
4ee9c684 | 445 | ref = expr->ref; |
446 | } | |
447 | ||
448 | /* For character variables, also get the length. */ | |
449 | if (sym->ts.type == BT_CHARACTER) | |
450 | { | |
7af6a4af | 451 | /* If the character length of an entry isn't set, get the length from |
452 | the master function instead. */ | |
453 | if (sym->attr.entry && !sym->ts.cl->backend_decl) | |
454 | se->string_length = sym->ns->proc_name->ts.cl->backend_decl; | |
455 | else | |
456 | se->string_length = sym->ts.cl->backend_decl; | |
22d678e8 | 457 | gcc_assert (se->string_length); |
4ee9c684 | 458 | } |
459 | ||
460 | while (ref) | |
461 | { | |
462 | switch (ref->type) | |
463 | { | |
464 | case REF_ARRAY: | |
465 | /* Return the descriptor if that's what we want and this is an array | |
466 | section reference. */ | |
467 | if (se->descriptor_only && ref->u.ar.type != AR_ELEMENT) | |
468 | return; | |
469 | /* TODO: Pointers to single elements of array sections, eg elemental subs. */ | |
470 | /* Return the descriptor for array pointers and allocations. */ | |
471 | if (se->want_pointer | |
472 | && ref->next == NULL && (se->descriptor_only)) | |
473 | return; | |
474 | ||
475 | gfc_conv_array_ref (se, &ref->u.ar); | |
476 | /* Return a pointer to an element. */ | |
477 | break; | |
478 | ||
479 | case REF_COMPONENT: | |
480 | gfc_conv_component_ref (se, ref); | |
481 | break; | |
482 | ||
483 | case REF_SUBSTRING: | |
484 | gfc_conv_substring (se, ref, expr->ts.kind); | |
485 | break; | |
486 | ||
487 | default: | |
22d678e8 | 488 | gcc_unreachable (); |
4ee9c684 | 489 | break; |
490 | } | |
491 | ref = ref->next; | |
492 | } | |
493 | /* Pointer assignment, allocation or pass by reference. Arrays are handled | |
f888a3fb | 494 | separately. */ |
4ee9c684 | 495 | if (se->want_pointer) |
496 | { | |
497 | if (expr->ts.type == BT_CHARACTER) | |
498 | gfc_conv_string_parameter (se); | |
499 | else | |
9596685a | 500 | se->expr = build_fold_addr_expr (se->expr); |
4ee9c684 | 501 | } |
4ee9c684 | 502 | } |
503 | ||
504 | ||
505 | /* Unary ops are easy... Or they would be if ! was a valid op. */ | |
506 | ||
507 | static void | |
508 | gfc_conv_unary_op (enum tree_code code, gfc_se * se, gfc_expr * expr) | |
509 | { | |
510 | gfc_se operand; | |
511 | tree type; | |
512 | ||
22d678e8 | 513 | gcc_assert (expr->ts.type != BT_CHARACTER); |
4ee9c684 | 514 | /* Initialize the operand. */ |
515 | gfc_init_se (&operand, se); | |
9b773341 | 516 | gfc_conv_expr_val (&operand, expr->value.op.op1); |
4ee9c684 | 517 | gfc_add_block_to_block (&se->pre, &operand.pre); |
518 | ||
519 | type = gfc_typenode_for_spec (&expr->ts); | |
520 | ||
521 | /* TRUTH_NOT_EXPR is not a "true" unary operator in GCC. | |
522 | We must convert it to a compare to 0 (e.g. EQ_EXPR (op1, 0)). | |
f888a3fb | 523 | All other unary operators have an equivalent GIMPLE unary operator. */ |
4ee9c684 | 524 | if (code == TRUTH_NOT_EXPR) |
ed52ef8b | 525 | se->expr = build2 (EQ_EXPR, type, operand.expr, |
526 | convert (type, integer_zero_node)); | |
4ee9c684 | 527 | else |
528 | se->expr = build1 (code, type, operand.expr); | |
529 | ||
530 | } | |
531 | ||
76834664 | 532 | /* Expand power operator to optimal multiplications when a value is raised |
f888a3fb | 533 | to a constant integer n. See section 4.6.3, "Evaluation of Powers" of |
76834664 | 534 | Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer |
535 | Programming", 3rd Edition, 1998. */ | |
536 | ||
537 | /* This code is mostly duplicated from expand_powi in the backend. | |
538 | We establish the "optimal power tree" lookup table with the defined size. | |
539 | The items in the table are the exponents used to calculate the index | |
540 | exponents. Any integer n less than the value can get an "addition chain", | |
541 | with the first node being one. */ | |
542 | #define POWI_TABLE_SIZE 256 | |
543 | ||
f888a3fb | 544 | /* The table is from builtins.c. */ |
76834664 | 545 | static const unsigned char powi_table[POWI_TABLE_SIZE] = |
546 | { | |
547 | 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */ | |
548 | 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */ | |
549 | 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */ | |
550 | 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */ | |
551 | 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */ | |
552 | 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */ | |
553 | 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */ | |
554 | 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */ | |
555 | 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */ | |
556 | 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */ | |
557 | 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */ | |
558 | 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */ | |
559 | 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */ | |
560 | 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */ | |
561 | 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */ | |
562 | 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */ | |
563 | 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */ | |
564 | 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */ | |
565 | 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */ | |
566 | 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */ | |
567 | 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */ | |
568 | 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */ | |
569 | 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */ | |
570 | 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */ | |
571 | 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */ | |
572 | 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */ | |
573 | 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */ | |
574 | 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */ | |
575 | 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */ | |
576 | 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */ | |
577 | 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */ | |
578 | 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */ | |
579 | }; | |
580 | ||
f888a3fb | 581 | /* If n is larger than lookup table's max index, we use the "window |
582 | method". */ | |
76834664 | 583 | #define POWI_WINDOW_SIZE 3 |
584 | ||
f888a3fb | 585 | /* Recursive function to expand the power operator. The temporary |
586 | values are put in tmpvar. The function returns tmpvar[1] ** n. */ | |
76834664 | 587 | static tree |
588 | gfc_conv_powi (gfc_se * se, int n, tree * tmpvar) | |
4ee9c684 | 589 | { |
76834664 | 590 | tree op0; |
591 | tree op1; | |
4ee9c684 | 592 | tree tmp; |
76834664 | 593 | int digit; |
4ee9c684 | 594 | |
76834664 | 595 | if (n < POWI_TABLE_SIZE) |
4ee9c684 | 596 | { |
76834664 | 597 | if (tmpvar[n]) |
598 | return tmpvar[n]; | |
4ee9c684 | 599 | |
76834664 | 600 | op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar); |
601 | op1 = gfc_conv_powi (se, powi_table[n], tmpvar); | |
602 | } | |
603 | else if (n & 1) | |
604 | { | |
605 | digit = n & ((1 << POWI_WINDOW_SIZE) - 1); | |
606 | op0 = gfc_conv_powi (se, n - digit, tmpvar); | |
607 | op1 = gfc_conv_powi (se, digit, tmpvar); | |
4ee9c684 | 608 | } |
609 | else | |
610 | { | |
76834664 | 611 | op0 = gfc_conv_powi (se, n >> 1, tmpvar); |
612 | op1 = op0; | |
4ee9c684 | 613 | } |
614 | ||
318c9b27 | 615 | tmp = fold_build2 (MULT_EXPR, TREE_TYPE (op0), op0, op1); |
76834664 | 616 | tmp = gfc_evaluate_now (tmp, &se->pre); |
4ee9c684 | 617 | |
76834664 | 618 | if (n < POWI_TABLE_SIZE) |
619 | tmpvar[n] = tmp; | |
4ee9c684 | 620 | |
76834664 | 621 | return tmp; |
622 | } | |
4ee9c684 | 623 | |
f888a3fb | 624 | |
625 | /* Expand lhs ** rhs. rhs is a constant integer. If it expands successfully, | |
626 | return 1. Else return 0 and a call to runtime library functions | |
627 | will have to be built. */ | |
76834664 | 628 | static int |
629 | gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs) | |
630 | { | |
631 | tree cond; | |
632 | tree tmp; | |
633 | tree type; | |
634 | tree vartmp[POWI_TABLE_SIZE]; | |
635 | int n; | |
636 | int sgn; | |
4ee9c684 | 637 | |
76834664 | 638 | type = TREE_TYPE (lhs); |
639 | n = abs (TREE_INT_CST_LOW (rhs)); | |
640 | sgn = tree_int_cst_sgn (rhs); | |
4ee9c684 | 641 | |
31ad0f07 | 642 | if (((FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations) || optimize_size) |
643 | && (n > 2 || n < -1)) | |
76834664 | 644 | return 0; |
4ee9c684 | 645 | |
76834664 | 646 | /* rhs == 0 */ |
647 | if (sgn == 0) | |
648 | { | |
649 | se->expr = gfc_build_const (type, integer_one_node); | |
650 | return 1; | |
651 | } | |
652 | /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */ | |
653 | if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE)) | |
654 | { | |
ed52ef8b | 655 | tmp = build2 (EQ_EXPR, boolean_type_node, lhs, |
656 | fold_convert (TREE_TYPE (lhs), integer_minus_one_node)); | |
657 | cond = build2 (EQ_EXPR, boolean_type_node, lhs, | |
658 | convert (TREE_TYPE (lhs), integer_one_node)); | |
76834664 | 659 | |
f888a3fb | 660 | /* If rhs is even, |
260abd71 | 661 | result = (lhs == 1 || lhs == -1) ? 1 : 0. */ |
76834664 | 662 | if ((n & 1) == 0) |
663 | { | |
ed52ef8b | 664 | tmp = build2 (TRUTH_OR_EXPR, boolean_type_node, tmp, cond); |
665 | se->expr = build3 (COND_EXPR, type, tmp, | |
666 | convert (type, integer_one_node), | |
667 | convert (type, integer_zero_node)); | |
76834664 | 668 | return 1; |
669 | } | |
f888a3fb | 670 | /* If rhs is odd, |
76834664 | 671 | result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */ |
ed52ef8b | 672 | tmp = build3 (COND_EXPR, type, tmp, |
673 | convert (type, integer_minus_one_node), | |
674 | convert (type, integer_zero_node)); | |
675 | se->expr = build3 (COND_EXPR, type, cond, | |
676 | convert (type, integer_one_node), | |
677 | tmp); | |
76834664 | 678 | return 1; |
679 | } | |
4ee9c684 | 680 | |
76834664 | 681 | memset (vartmp, 0, sizeof (vartmp)); |
682 | vartmp[1] = lhs; | |
76834664 | 683 | if (sgn == -1) |
684 | { | |
685 | tmp = gfc_build_const (type, integer_one_node); | |
ed52ef8b | 686 | vartmp[1] = build2 (RDIV_EXPR, type, tmp, vartmp[1]); |
76834664 | 687 | } |
f5efe504 | 688 | |
689 | se->expr = gfc_conv_powi (se, n, vartmp); | |
690 | ||
76834664 | 691 | return 1; |
4ee9c684 | 692 | } |
693 | ||
694 | ||
76834664 | 695 | /* Power op (**). Constant integer exponent has special handling. */ |
4ee9c684 | 696 | |
697 | static void | |
698 | gfc_conv_power_op (gfc_se * se, gfc_expr * expr) | |
699 | { | |
90ba9145 | 700 | tree gfc_int4_type_node; |
4ee9c684 | 701 | int kind; |
76834664 | 702 | int ikind; |
4ee9c684 | 703 | gfc_se lse; |
704 | gfc_se rse; | |
705 | tree fndecl; | |
706 | tree tmp; | |
4ee9c684 | 707 | |
708 | gfc_init_se (&lse, se); | |
9b773341 | 709 | gfc_conv_expr_val (&lse, expr->value.op.op1); |
7f0345dc | 710 | lse.expr = gfc_evaluate_now (lse.expr, &lse.pre); |
4ee9c684 | 711 | gfc_add_block_to_block (&se->pre, &lse.pre); |
712 | ||
713 | gfc_init_se (&rse, se); | |
9b773341 | 714 | gfc_conv_expr_val (&rse, expr->value.op.op2); |
4ee9c684 | 715 | gfc_add_block_to_block (&se->pre, &rse.pre); |
716 | ||
9b773341 | 717 | if (expr->value.op.op2->ts.type == BT_INTEGER |
718 | && expr->value.op.op2->expr_type == EXPR_CONSTANT) | |
76834664 | 719 | if (gfc_conv_cst_int_power (se, lse.expr, rse.expr)) |
720 | return; | |
4ee9c684 | 721 | |
90ba9145 | 722 | gfc_int4_type_node = gfc_get_int_type (4); |
723 | ||
9b773341 | 724 | kind = expr->value.op.op1->ts.kind; |
725 | switch (expr->value.op.op2->ts.type) | |
4ee9c684 | 726 | { |
727 | case BT_INTEGER: | |
9b773341 | 728 | ikind = expr->value.op.op2->ts.kind; |
76834664 | 729 | switch (ikind) |
730 | { | |
731 | case 1: | |
732 | case 2: | |
733 | rse.expr = convert (gfc_int4_type_node, rse.expr); | |
734 | /* Fall through. */ | |
735 | ||
736 | case 4: | |
737 | ikind = 0; | |
738 | break; | |
739 | ||
740 | case 8: | |
741 | ikind = 1; | |
742 | break; | |
743 | ||
920e54ef | 744 | case 16: |
745 | ikind = 2; | |
746 | break; | |
747 | ||
76834664 | 748 | default: |
22d678e8 | 749 | gcc_unreachable (); |
76834664 | 750 | } |
751 | switch (kind) | |
752 | { | |
753 | case 1: | |
754 | case 2: | |
9b773341 | 755 | if (expr->value.op.op1->ts.type == BT_INTEGER) |
76834664 | 756 | lse.expr = convert (gfc_int4_type_node, lse.expr); |
757 | else | |
22d678e8 | 758 | gcc_unreachable (); |
76834664 | 759 | /* Fall through. */ |
760 | ||
761 | case 4: | |
762 | kind = 0; | |
763 | break; | |
764 | ||
765 | case 8: | |
766 | kind = 1; | |
767 | break; | |
768 | ||
920e54ef | 769 | case 10: |
770 | kind = 2; | |
771 | break; | |
772 | ||
773 | case 16: | |
774 | kind = 3; | |
775 | break; | |
776 | ||
76834664 | 777 | default: |
22d678e8 | 778 | gcc_unreachable (); |
76834664 | 779 | } |
780 | ||
9b773341 | 781 | switch (expr->value.op.op1->ts.type) |
76834664 | 782 | { |
783 | case BT_INTEGER: | |
920e54ef | 784 | if (kind == 3) /* Case 16 was not handled properly above. */ |
785 | kind = 2; | |
76834664 | 786 | fndecl = gfor_fndecl_math_powi[kind][ikind].integer; |
787 | break; | |
788 | ||
789 | case BT_REAL: | |
790 | fndecl = gfor_fndecl_math_powi[kind][ikind].real; | |
791 | break; | |
792 | ||
793 | case BT_COMPLEX: | |
794 | fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx; | |
795 | break; | |
796 | ||
797 | default: | |
22d678e8 | 798 | gcc_unreachable (); |
76834664 | 799 | } |
800 | break; | |
4ee9c684 | 801 | |
802 | case BT_REAL: | |
803 | switch (kind) | |
804 | { | |
805 | case 4: | |
76834664 | 806 | fndecl = built_in_decls[BUILT_IN_POWF]; |
4ee9c684 | 807 | break; |
808 | case 8: | |
76834664 | 809 | fndecl = built_in_decls[BUILT_IN_POW]; |
4ee9c684 | 810 | break; |
920e54ef | 811 | case 10: |
812 | case 16: | |
813 | fndecl = built_in_decls[BUILT_IN_POWL]; | |
814 | break; | |
4ee9c684 | 815 | default: |
22d678e8 | 816 | gcc_unreachable (); |
4ee9c684 | 817 | } |
818 | break; | |
819 | ||
820 | case BT_COMPLEX: | |
821 | switch (kind) | |
822 | { | |
823 | case 4: | |
824 | fndecl = gfor_fndecl_math_cpowf; | |
825 | break; | |
826 | case 8: | |
827 | fndecl = gfor_fndecl_math_cpow; | |
828 | break; | |
920e54ef | 829 | case 10: |
830 | fndecl = gfor_fndecl_math_cpowl10; | |
831 | break; | |
832 | case 16: | |
833 | fndecl = gfor_fndecl_math_cpowl16; | |
834 | break; | |
4ee9c684 | 835 | default: |
22d678e8 | 836 | gcc_unreachable (); |
4ee9c684 | 837 | } |
838 | break; | |
839 | ||
840 | default: | |
22d678e8 | 841 | gcc_unreachable (); |
4ee9c684 | 842 | break; |
843 | } | |
844 | ||
845 | tmp = gfc_chainon_list (NULL_TREE, lse.expr); | |
846 | tmp = gfc_chainon_list (tmp, rse.expr); | |
ac47d547 | 847 | se->expr = build_function_call_expr (fndecl, tmp); |
4ee9c684 | 848 | } |
849 | ||
850 | ||
851 | /* Generate code to allocate a string temporary. */ | |
852 | ||
853 | tree | |
854 | gfc_conv_string_tmp (gfc_se * se, tree type, tree len) | |
855 | { | |
856 | tree var; | |
857 | tree tmp; | |
858 | tree args; | |
859 | ||
22d678e8 | 860 | gcc_assert (TREE_TYPE (len) == gfc_charlen_type_node); |
260abd71 | 861 | |
4ee9c684 | 862 | if (gfc_can_put_var_on_stack (len)) |
863 | { | |
864 | /* Create a temporary variable to hold the result. */ | |
318c9b27 | 865 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, |
866 | convert (gfc_charlen_type_node, integer_one_node)); | |
260abd71 | 867 | tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp); |
4ee9c684 | 868 | tmp = build_array_type (gfc_character1_type_node, tmp); |
869 | var = gfc_create_var (tmp, "str"); | |
870 | var = gfc_build_addr_expr (type, var); | |
871 | } | |
872 | else | |
873 | { | |
874 | /* Allocate a temporary to hold the result. */ | |
875 | var = gfc_create_var (type, "pstr"); | |
876 | args = gfc_chainon_list (NULL_TREE, len); | |
ac47d547 | 877 | tmp = build_function_call_expr (gfor_fndecl_internal_malloc, args); |
4ee9c684 | 878 | tmp = convert (type, tmp); |
879 | gfc_add_modify_expr (&se->pre, var, tmp); | |
880 | ||
881 | /* Free the temporary afterwards. */ | |
882 | tmp = convert (pvoid_type_node, var); | |
883 | args = gfc_chainon_list (NULL_TREE, tmp); | |
ac47d547 | 884 | tmp = build_function_call_expr (gfor_fndecl_internal_free, args); |
4ee9c684 | 885 | gfc_add_expr_to_block (&se->post, tmp); |
886 | } | |
887 | ||
888 | return var; | |
889 | } | |
890 | ||
891 | ||
892 | /* Handle a string concatenation operation. A temporary will be allocated to | |
893 | hold the result. */ | |
894 | ||
895 | static void | |
896 | gfc_conv_concat_op (gfc_se * se, gfc_expr * expr) | |
897 | { | |
898 | gfc_se lse; | |
899 | gfc_se rse; | |
900 | tree len; | |
901 | tree type; | |
902 | tree var; | |
903 | tree args; | |
904 | tree tmp; | |
905 | ||
9b773341 | 906 | gcc_assert (expr->value.op.op1->ts.type == BT_CHARACTER |
907 | && expr->value.op.op2->ts.type == BT_CHARACTER); | |
4ee9c684 | 908 | |
909 | gfc_init_se (&lse, se); | |
9b773341 | 910 | gfc_conv_expr (&lse, expr->value.op.op1); |
4ee9c684 | 911 | gfc_conv_string_parameter (&lse); |
912 | gfc_init_se (&rse, se); | |
9b773341 | 913 | gfc_conv_expr (&rse, expr->value.op.op2); |
4ee9c684 | 914 | gfc_conv_string_parameter (&rse); |
915 | ||
916 | gfc_add_block_to_block (&se->pre, &lse.pre); | |
917 | gfc_add_block_to_block (&se->pre, &rse.pre); | |
918 | ||
919 | type = gfc_get_character_type (expr->ts.kind, expr->ts.cl); | |
920 | len = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); | |
921 | if (len == NULL_TREE) | |
922 | { | |
318c9b27 | 923 | len = fold_build2 (PLUS_EXPR, TREE_TYPE (lse.string_length), |
924 | lse.string_length, rse.string_length); | |
4ee9c684 | 925 | } |
926 | ||
927 | type = build_pointer_type (type); | |
928 | ||
929 | var = gfc_conv_string_tmp (se, type, len); | |
930 | ||
931 | /* Do the actual concatenation. */ | |
932 | args = NULL_TREE; | |
933 | args = gfc_chainon_list (args, len); | |
934 | args = gfc_chainon_list (args, var); | |
935 | args = gfc_chainon_list (args, lse.string_length); | |
936 | args = gfc_chainon_list (args, lse.expr); | |
937 | args = gfc_chainon_list (args, rse.string_length); | |
938 | args = gfc_chainon_list (args, rse.expr); | |
ac47d547 | 939 | tmp = build_function_call_expr (gfor_fndecl_concat_string, args); |
4ee9c684 | 940 | gfc_add_expr_to_block (&se->pre, tmp); |
941 | ||
942 | /* Add the cleanup for the operands. */ | |
943 | gfc_add_block_to_block (&se->pre, &rse.post); | |
944 | gfc_add_block_to_block (&se->pre, &lse.post); | |
945 | ||
946 | se->expr = var; | |
947 | se->string_length = len; | |
948 | } | |
949 | ||
4ee9c684 | 950 | /* Translates an op expression. Common (binary) cases are handled by this |
951 | function, others are passed on. Recursion is used in either case. | |
952 | We use the fact that (op1.ts == op2.ts) (except for the power | |
f888a3fb | 953 | operator **). |
4ee9c684 | 954 | Operators need no special handling for scalarized expressions as long as |
f888a3fb | 955 | they call gfc_conv_simple_val to get their operands. |
4ee9c684 | 956 | Character strings get special handling. */ |
957 | ||
958 | static void | |
959 | gfc_conv_expr_op (gfc_se * se, gfc_expr * expr) | |
960 | { | |
961 | enum tree_code code; | |
962 | gfc_se lse; | |
963 | gfc_se rse; | |
964 | tree type; | |
965 | tree tmp; | |
966 | int lop; | |
967 | int checkstring; | |
968 | ||
969 | checkstring = 0; | |
970 | lop = 0; | |
9b773341 | 971 | switch (expr->value.op.operator) |
4ee9c684 | 972 | { |
973 | case INTRINSIC_UPLUS: | |
42b215cc | 974 | case INTRINSIC_PARENTHESES: |
9b773341 | 975 | gfc_conv_expr (se, expr->value.op.op1); |
4ee9c684 | 976 | return; |
977 | ||
978 | case INTRINSIC_UMINUS: | |
979 | gfc_conv_unary_op (NEGATE_EXPR, se, expr); | |
980 | return; | |
981 | ||
982 | case INTRINSIC_NOT: | |
983 | gfc_conv_unary_op (TRUTH_NOT_EXPR, se, expr); | |
984 | return; | |
985 | ||
986 | case INTRINSIC_PLUS: | |
987 | code = PLUS_EXPR; | |
988 | break; | |
989 | ||
990 | case INTRINSIC_MINUS: | |
991 | code = MINUS_EXPR; | |
992 | break; | |
993 | ||
994 | case INTRINSIC_TIMES: | |
995 | code = MULT_EXPR; | |
996 | break; | |
997 | ||
998 | case INTRINSIC_DIVIDE: | |
999 | /* If expr is a real or complex expr, use an RDIV_EXPR. If op1 is | |
1000 | an integer, we must round towards zero, so we use a | |
1001 | TRUNC_DIV_EXPR. */ | |
1002 | if (expr->ts.type == BT_INTEGER) | |
1003 | code = TRUNC_DIV_EXPR; | |
1004 | else | |
1005 | code = RDIV_EXPR; | |
1006 | break; | |
1007 | ||
1008 | case INTRINSIC_POWER: | |
1009 | gfc_conv_power_op (se, expr); | |
1010 | return; | |
1011 | ||
1012 | case INTRINSIC_CONCAT: | |
1013 | gfc_conv_concat_op (se, expr); | |
1014 | return; | |
1015 | ||
1016 | case INTRINSIC_AND: | |
1017 | code = TRUTH_ANDIF_EXPR; | |
1018 | lop = 1; | |
1019 | break; | |
1020 | ||
1021 | case INTRINSIC_OR: | |
1022 | code = TRUTH_ORIF_EXPR; | |
1023 | lop = 1; | |
1024 | break; | |
1025 | ||
1026 | /* EQV and NEQV only work on logicals, but since we represent them | |
88bce636 | 1027 | as integers, we can use EQ_EXPR and NE_EXPR for them in GIMPLE. */ |
4ee9c684 | 1028 | case INTRINSIC_EQ: |
1029 | case INTRINSIC_EQV: | |
1030 | code = EQ_EXPR; | |
1031 | checkstring = 1; | |
1032 | lop = 1; | |
1033 | break; | |
1034 | ||
1035 | case INTRINSIC_NE: | |
1036 | case INTRINSIC_NEQV: | |
1037 | code = NE_EXPR; | |
1038 | checkstring = 1; | |
1039 | lop = 1; | |
1040 | break; | |
1041 | ||
1042 | case INTRINSIC_GT: | |
1043 | code = GT_EXPR; | |
1044 | checkstring = 1; | |
1045 | lop = 1; | |
1046 | break; | |
1047 | ||
1048 | case INTRINSIC_GE: | |
1049 | code = GE_EXPR; | |
1050 | checkstring = 1; | |
1051 | lop = 1; | |
1052 | break; | |
1053 | ||
1054 | case INTRINSIC_LT: | |
1055 | code = LT_EXPR; | |
1056 | checkstring = 1; | |
1057 | lop = 1; | |
1058 | break; | |
1059 | ||
1060 | case INTRINSIC_LE: | |
1061 | code = LE_EXPR; | |
1062 | checkstring = 1; | |
1063 | lop = 1; | |
1064 | break; | |
1065 | ||
1066 | case INTRINSIC_USER: | |
1067 | case INTRINSIC_ASSIGN: | |
1068 | /* These should be converted into function calls by the frontend. */ | |
22d678e8 | 1069 | gcc_unreachable (); |
4ee9c684 | 1070 | |
1071 | default: | |
1072 | fatal_error ("Unknown intrinsic op"); | |
1073 | return; | |
1074 | } | |
1075 | ||
f888a3fb | 1076 | /* The only exception to this is **, which is handled separately anyway. */ |
9b773341 | 1077 | gcc_assert (expr->value.op.op1->ts.type == expr->value.op.op2->ts.type); |
4ee9c684 | 1078 | |
9b773341 | 1079 | if (checkstring && expr->value.op.op1->ts.type != BT_CHARACTER) |
4ee9c684 | 1080 | checkstring = 0; |
1081 | ||
1082 | /* lhs */ | |
1083 | gfc_init_se (&lse, se); | |
9b773341 | 1084 | gfc_conv_expr (&lse, expr->value.op.op1); |
4ee9c684 | 1085 | gfc_add_block_to_block (&se->pre, &lse.pre); |
1086 | ||
1087 | /* rhs */ | |
1088 | gfc_init_se (&rse, se); | |
9b773341 | 1089 | gfc_conv_expr (&rse, expr->value.op.op2); |
4ee9c684 | 1090 | gfc_add_block_to_block (&se->pre, &rse.pre); |
1091 | ||
4ee9c684 | 1092 | if (checkstring) |
1093 | { | |
1094 | gfc_conv_string_parameter (&lse); | |
1095 | gfc_conv_string_parameter (&rse); | |
4ee9c684 | 1096 | |
77100724 | 1097 | lse.expr = gfc_build_compare_string (lse.string_length, lse.expr, |
1098 | rse.string_length, rse.expr); | |
4ee9c684 | 1099 | rse.expr = integer_zero_node; |
77100724 | 1100 | gfc_add_block_to_block (&lse.post, &rse.post); |
4ee9c684 | 1101 | } |
1102 | ||
1103 | type = gfc_typenode_for_spec (&expr->ts); | |
1104 | ||
1105 | if (lop) | |
1106 | { | |
1107 | /* The result of logical ops is always boolean_type_node. */ | |
318c9b27 | 1108 | tmp = fold_build2 (code, type, lse.expr, rse.expr); |
4ee9c684 | 1109 | se->expr = convert (type, tmp); |
1110 | } | |
1111 | else | |
318c9b27 | 1112 | se->expr = fold_build2 (code, type, lse.expr, rse.expr); |
4ee9c684 | 1113 | |
4ee9c684 | 1114 | /* Add the post blocks. */ |
1115 | gfc_add_block_to_block (&se->post, &rse.post); | |
1116 | gfc_add_block_to_block (&se->post, &lse.post); | |
1117 | } | |
1118 | ||
77100724 | 1119 | /* If a string's length is one, we convert it to a single character. */ |
1120 | ||
1121 | static tree | |
1122 | gfc_to_single_character (tree len, tree str) | |
1123 | { | |
1124 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (str))); | |
1125 | ||
1126 | if (INTEGER_CST_P (len) && TREE_INT_CST_LOW (len) == 1 | |
1127 | && TREE_INT_CST_HIGH (len) == 0) | |
1128 | { | |
1129 | str = fold_convert (pchar_type_node, str); | |
1130 | return build_fold_indirect_ref (str); | |
1131 | } | |
1132 | ||
1133 | return NULL_TREE; | |
1134 | } | |
1135 | ||
1136 | /* Compare two strings. If they are all single characters, the result is the | |
1137 | subtraction of them. Otherwise, we build a library call. */ | |
1138 | ||
1139 | tree | |
1140 | gfc_build_compare_string (tree len1, tree str1, tree len2, tree str2) | |
1141 | { | |
1142 | tree sc1; | |
1143 | tree sc2; | |
1144 | tree type; | |
1145 | tree tmp; | |
1146 | ||
1147 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (str1))); | |
1148 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (str2))); | |
1149 | ||
1150 | type = gfc_get_int_type (gfc_default_integer_kind); | |
1151 | ||
1152 | sc1 = gfc_to_single_character (len1, str1); | |
1153 | sc2 = gfc_to_single_character (len2, str2); | |
1154 | ||
1155 | /* Deal with single character specially. */ | |
1156 | if (sc1 != NULL_TREE && sc2 != NULL_TREE) | |
1157 | { | |
1158 | sc1 = fold_convert (type, sc1); | |
1159 | sc2 = fold_convert (type, sc2); | |
1160 | tmp = fold_build2 (MINUS_EXPR, type, sc1, sc2); | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | tmp = NULL_TREE; | |
1165 | tmp = gfc_chainon_list (tmp, len1); | |
1166 | tmp = gfc_chainon_list (tmp, str1); | |
1167 | tmp = gfc_chainon_list (tmp, len2); | |
1168 | tmp = gfc_chainon_list (tmp, str2); | |
1169 | ||
1170 | /* Build a call for the comparison. */ | |
1171 | tmp = build_function_call_expr (gfor_fndecl_compare_string, tmp); | |
1172 | } | |
1173 | ||
1174 | return tmp; | |
1175 | } | |
f888a3fb | 1176 | |
4ee9c684 | 1177 | static void |
1178 | gfc_conv_function_val (gfc_se * se, gfc_symbol * sym) | |
1179 | { | |
1180 | tree tmp; | |
1181 | ||
1182 | if (sym->attr.dummy) | |
1183 | { | |
1184 | tmp = gfc_get_symbol_decl (sym); | |
22d678e8 | 1185 | gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE |
4ee9c684 | 1186 | && TREE_CODE (TREE_TYPE (TREE_TYPE (tmp))) == FUNCTION_TYPE); |
4ee9c684 | 1187 | } |
1188 | else | |
1189 | { | |
1190 | if (!sym->backend_decl) | |
1191 | sym->backend_decl = gfc_get_extern_function_decl (sym); | |
1192 | ||
1193 | tmp = sym->backend_decl; | |
08569428 | 1194 | if (!POINTER_TYPE_P (TREE_TYPE (tmp))) |
1195 | { | |
1196 | gcc_assert (TREE_CODE (tmp) == FUNCTION_DECL); | |
9596685a | 1197 | tmp = build_fold_addr_expr (tmp); |
08569428 | 1198 | } |
1199 | } | |
1200 | se->expr = tmp; | |
1201 | } | |
1202 | ||
1203 | ||
08569428 | 1204 | /* Initialize MAPPING. */ |
1205 | ||
f45a476e | 1206 | void |
08569428 | 1207 | gfc_init_interface_mapping (gfc_interface_mapping * mapping) |
1208 | { | |
1209 | mapping->syms = NULL; | |
1210 | mapping->charlens = NULL; | |
1211 | } | |
1212 | ||
1213 | ||
1214 | /* Free all memory held by MAPPING (but not MAPPING itself). */ | |
1215 | ||
f45a476e | 1216 | void |
08569428 | 1217 | gfc_free_interface_mapping (gfc_interface_mapping * mapping) |
1218 | { | |
1219 | gfc_interface_sym_mapping *sym; | |
1220 | gfc_interface_sym_mapping *nextsym; | |
1221 | gfc_charlen *cl; | |
1222 | gfc_charlen *nextcl; | |
1223 | ||
1224 | for (sym = mapping->syms; sym; sym = nextsym) | |
1225 | { | |
1226 | nextsym = sym->next; | |
1227 | gfc_free_symbol (sym->new->n.sym); | |
1228 | gfc_free (sym->new); | |
1229 | gfc_free (sym); | |
1230 | } | |
1231 | for (cl = mapping->charlens; cl; cl = nextcl) | |
1232 | { | |
1233 | nextcl = cl->next; | |
1234 | gfc_free_expr (cl->length); | |
1235 | gfc_free (cl); | |
4ee9c684 | 1236 | } |
1237 | } | |
1238 | ||
1239 | ||
08569428 | 1240 | /* Return a copy of gfc_charlen CL. Add the returned structure to |
1241 | MAPPING so that it will be freed by gfc_free_interface_mapping. */ | |
1242 | ||
1243 | static gfc_charlen * | |
1244 | gfc_get_interface_mapping_charlen (gfc_interface_mapping * mapping, | |
1245 | gfc_charlen * cl) | |
1246 | { | |
1247 | gfc_charlen *new; | |
1248 | ||
1249 | new = gfc_get_charlen (); | |
1250 | new->next = mapping->charlens; | |
1251 | new->length = gfc_copy_expr (cl->length); | |
1252 | ||
1253 | mapping->charlens = new; | |
1254 | return new; | |
1255 | } | |
1256 | ||
1257 | ||
1258 | /* A subroutine of gfc_add_interface_mapping. Return a descriptorless | |
1259 | array variable that can be used as the actual argument for dummy | |
1260 | argument SYM. Add any initialization code to BLOCK. PACKED is as | |
1261 | for gfc_get_nodesc_array_type and DATA points to the first element | |
1262 | in the passed array. */ | |
1263 | ||
1264 | static tree | |
1265 | gfc_get_interface_mapping_array (stmtblock_t * block, gfc_symbol * sym, | |
1266 | int packed, tree data) | |
1267 | { | |
1268 | tree type; | |
1269 | tree var; | |
1270 | ||
1271 | type = gfc_typenode_for_spec (&sym->ts); | |
1272 | type = gfc_get_nodesc_array_type (type, sym->as, packed); | |
1273 | ||
5e8cd291 | 1274 | var = gfc_create_var (type, "ifm"); |
08569428 | 1275 | gfc_add_modify_expr (block, var, fold_convert (type, data)); |
1276 | ||
1277 | return var; | |
1278 | } | |
1279 | ||
1280 | ||
1281 | /* A subroutine of gfc_add_interface_mapping. Set the stride, upper bounds | |
1282 | and offset of descriptorless array type TYPE given that it has the same | |
1283 | size as DESC. Add any set-up code to BLOCK. */ | |
1284 | ||
1285 | static void | |
1286 | gfc_set_interface_mapping_bounds (stmtblock_t * block, tree type, tree desc) | |
1287 | { | |
1288 | int n; | |
1289 | tree dim; | |
1290 | tree offset; | |
1291 | tree tmp; | |
1292 | ||
1293 | offset = gfc_index_zero_node; | |
1294 | for (n = 0; n < GFC_TYPE_ARRAY_RANK (type); n++) | |
1295 | { | |
1296 | GFC_TYPE_ARRAY_STRIDE (type, n) = gfc_conv_array_stride (desc, n); | |
1297 | if (GFC_TYPE_ARRAY_UBOUND (type, n) == NULL_TREE) | |
1298 | { | |
1299 | dim = gfc_rank_cst[n]; | |
1300 | tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1301 | gfc_conv_descriptor_ubound (desc, dim), | |
1302 | gfc_conv_descriptor_lbound (desc, dim)); | |
1303 | tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1304 | GFC_TYPE_ARRAY_LBOUND (type, n), | |
1305 | tmp); | |
1306 | tmp = gfc_evaluate_now (tmp, block); | |
1307 | GFC_TYPE_ARRAY_UBOUND (type, n) = tmp; | |
1308 | } | |
1309 | tmp = fold_build2 (MULT_EXPR, gfc_array_index_type, | |
1310 | GFC_TYPE_ARRAY_LBOUND (type, n), | |
1311 | GFC_TYPE_ARRAY_STRIDE (type, n)); | |
1312 | offset = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp); | |
1313 | } | |
1314 | offset = gfc_evaluate_now (offset, block); | |
1315 | GFC_TYPE_ARRAY_OFFSET (type) = offset; | |
1316 | } | |
1317 | ||
1318 | ||
1319 | /* Extend MAPPING so that it maps dummy argument SYM to the value stored | |
1320 | in SE. The caller may still use se->expr and se->string_length after | |
1321 | calling this function. */ | |
1322 | ||
f45a476e | 1323 | void |
08569428 | 1324 | gfc_add_interface_mapping (gfc_interface_mapping * mapping, |
1325 | gfc_symbol * sym, gfc_se * se) | |
1326 | { | |
1327 | gfc_interface_sym_mapping *sm; | |
1328 | tree desc; | |
1329 | tree tmp; | |
1330 | tree value; | |
1331 | gfc_symbol *new_sym; | |
1332 | gfc_symtree *root; | |
1333 | gfc_symtree *new_symtree; | |
1334 | ||
1335 | /* Create a new symbol to represent the actual argument. */ | |
1336 | new_sym = gfc_new_symbol (sym->name, NULL); | |
1337 | new_sym->ts = sym->ts; | |
1338 | new_sym->attr.referenced = 1; | |
1339 | new_sym->attr.dimension = sym->attr.dimension; | |
1340 | new_sym->attr.pointer = sym->attr.pointer; | |
76845580 | 1341 | new_sym->attr.allocatable = sym->attr.allocatable; |
08569428 | 1342 | new_sym->attr.flavor = sym->attr.flavor; |
1343 | ||
1344 | /* Create a fake symtree for it. */ | |
1345 | root = NULL; | |
1346 | new_symtree = gfc_new_symtree (&root, sym->name); | |
1347 | new_symtree->n.sym = new_sym; | |
1348 | gcc_assert (new_symtree == root); | |
1349 | ||
1350 | /* Create a dummy->actual mapping. */ | |
1351 | sm = gfc_getmem (sizeof (*sm)); | |
1352 | sm->next = mapping->syms; | |
1353 | sm->old = sym; | |
1354 | sm->new = new_symtree; | |
1355 | mapping->syms = sm; | |
1356 | ||
1357 | /* Stabilize the argument's value. */ | |
1358 | se->expr = gfc_evaluate_now (se->expr, &se->pre); | |
1359 | ||
1360 | if (sym->ts.type == BT_CHARACTER) | |
1361 | { | |
1362 | /* Create a copy of the dummy argument's length. */ | |
1363 | new_sym->ts.cl = gfc_get_interface_mapping_charlen (mapping, sym->ts.cl); | |
1364 | ||
1365 | /* If the length is specified as "*", record the length that | |
1366 | the caller is passing. We should use the callee's length | |
1367 | in all other cases. */ | |
1368 | if (!new_sym->ts.cl->length) | |
1369 | { | |
1370 | se->string_length = gfc_evaluate_now (se->string_length, &se->pre); | |
1371 | new_sym->ts.cl->backend_decl = se->string_length; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | /* Use the passed value as-is if the argument is a function. */ | |
1376 | if (sym->attr.flavor == FL_PROCEDURE) | |
1377 | value = se->expr; | |
1378 | ||
1379 | /* If the argument is either a string or a pointer to a string, | |
1380 | convert it to a boundless character type. */ | |
1381 | else if (!sym->attr.dimension && sym->ts.type == BT_CHARACTER) | |
1382 | { | |
1383 | tmp = gfc_get_character_type_len (sym->ts.kind, NULL); | |
1384 | tmp = build_pointer_type (tmp); | |
1385 | if (sym->attr.pointer) | |
1386 | tmp = build_pointer_type (tmp); | |
1387 | ||
1388 | value = fold_convert (tmp, se->expr); | |
1389 | if (sym->attr.pointer) | |
4fa2c167 | 1390 | value = build_fold_indirect_ref (value); |
08569428 | 1391 | } |
1392 | ||
76845580 | 1393 | /* If the argument is a scalar, a pointer to an array or an allocatable, |
1394 | dereference it. */ | |
1395 | else if (!sym->attr.dimension || sym->attr.pointer || sym->attr.allocatable) | |
4fa2c167 | 1396 | value = build_fold_indirect_ref (se->expr); |
e3071e62 | 1397 | |
1398 | /* For character(*), use the actual argument's descriptor. */ | |
1399 | else if (sym->ts.type == BT_CHARACTER && !new_sym->ts.cl->length) | |
1400 | value = build_fold_indirect_ref (se->expr); | |
08569428 | 1401 | |
1402 | /* If the argument is an array descriptor, use it to determine | |
1403 | information about the actual argument's shape. */ | |
1404 | else if (POINTER_TYPE_P (TREE_TYPE (se->expr)) | |
1405 | && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se->expr)))) | |
1406 | { | |
1407 | /* Get the actual argument's descriptor. */ | |
4fa2c167 | 1408 | desc = build_fold_indirect_ref (se->expr); |
08569428 | 1409 | |
1410 | /* Create the replacement variable. */ | |
1411 | tmp = gfc_conv_descriptor_data_get (desc); | |
1412 | value = gfc_get_interface_mapping_array (&se->pre, sym, 0, tmp); | |
1413 | ||
1414 | /* Use DESC to work out the upper bounds, strides and offset. */ | |
1415 | gfc_set_interface_mapping_bounds (&se->pre, TREE_TYPE (value), desc); | |
1416 | } | |
1417 | else | |
1418 | /* Otherwise we have a packed array. */ | |
1419 | value = gfc_get_interface_mapping_array (&se->pre, sym, 2, se->expr); | |
1420 | ||
1421 | new_sym->backend_decl = value; | |
1422 | } | |
1423 | ||
1424 | ||
1425 | /* Called once all dummy argument mappings have been added to MAPPING, | |
1426 | but before the mapping is used to evaluate expressions. Pre-evaluate | |
1427 | the length of each argument, adding any initialization code to PRE and | |
1428 | any finalization code to POST. */ | |
1429 | ||
f45a476e | 1430 | void |
08569428 | 1431 | gfc_finish_interface_mapping (gfc_interface_mapping * mapping, |
1432 | stmtblock_t * pre, stmtblock_t * post) | |
1433 | { | |
1434 | gfc_interface_sym_mapping *sym; | |
1435 | gfc_expr *expr; | |
1436 | gfc_se se; | |
1437 | ||
1438 | for (sym = mapping->syms; sym; sym = sym->next) | |
1439 | if (sym->new->n.sym->ts.type == BT_CHARACTER | |
1440 | && !sym->new->n.sym->ts.cl->backend_decl) | |
1441 | { | |
1442 | expr = sym->new->n.sym->ts.cl->length; | |
1443 | gfc_apply_interface_mapping_to_expr (mapping, expr); | |
1444 | gfc_init_se (&se, NULL); | |
1445 | gfc_conv_expr (&se, expr); | |
1446 | ||
1447 | se.expr = gfc_evaluate_now (se.expr, &se.pre); | |
1448 | gfc_add_block_to_block (pre, &se.pre); | |
1449 | gfc_add_block_to_block (post, &se.post); | |
1450 | ||
1451 | sym->new->n.sym->ts.cl->backend_decl = se.expr; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | ||
1456 | /* Like gfc_apply_interface_mapping_to_expr, but applied to | |
1457 | constructor C. */ | |
1458 | ||
1459 | static void | |
1460 | gfc_apply_interface_mapping_to_cons (gfc_interface_mapping * mapping, | |
1461 | gfc_constructor * c) | |
1462 | { | |
1463 | for (; c; c = c->next) | |
1464 | { | |
1465 | gfc_apply_interface_mapping_to_expr (mapping, c->expr); | |
1466 | if (c->iterator) | |
1467 | { | |
1468 | gfc_apply_interface_mapping_to_expr (mapping, c->iterator->start); | |
1469 | gfc_apply_interface_mapping_to_expr (mapping, c->iterator->end); | |
1470 | gfc_apply_interface_mapping_to_expr (mapping, c->iterator->step); | |
1471 | } | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | ||
1476 | /* Like gfc_apply_interface_mapping_to_expr, but applied to | |
1477 | reference REF. */ | |
1478 | ||
1479 | static void | |
1480 | gfc_apply_interface_mapping_to_ref (gfc_interface_mapping * mapping, | |
1481 | gfc_ref * ref) | |
1482 | { | |
1483 | int n; | |
1484 | ||
1485 | for (; ref; ref = ref->next) | |
1486 | switch (ref->type) | |
1487 | { | |
1488 | case REF_ARRAY: | |
1489 | for (n = 0; n < ref->u.ar.dimen; n++) | |
1490 | { | |
1491 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.start[n]); | |
1492 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.end[n]); | |
1493 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.stride[n]); | |
1494 | } | |
1495 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.offset); | |
1496 | break; | |
1497 | ||
1498 | case REF_COMPONENT: | |
1499 | break; | |
1500 | ||
1501 | case REF_SUBSTRING: | |
1502 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.start); | |
1503 | gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.end); | |
1504 | break; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | ||
1509 | /* EXPR is a copy of an expression that appeared in the interface | |
1510 | associated with MAPPING. Walk it recursively looking for references to | |
1511 | dummy arguments that MAPPING maps to actual arguments. Replace each such | |
1512 | reference with a reference to the associated actual argument. */ | |
1513 | ||
1514 | static void | |
1515 | gfc_apply_interface_mapping_to_expr (gfc_interface_mapping * mapping, | |
1516 | gfc_expr * expr) | |
1517 | { | |
1518 | gfc_interface_sym_mapping *sym; | |
1519 | gfc_actual_arglist *actual; | |
1520 | ||
1521 | if (!expr) | |
1522 | return; | |
1523 | ||
1524 | /* Copying an expression does not copy its length, so do that here. */ | |
1525 | if (expr->ts.type == BT_CHARACTER && expr->ts.cl) | |
1526 | { | |
1527 | expr->ts.cl = gfc_get_interface_mapping_charlen (mapping, expr->ts.cl); | |
1528 | gfc_apply_interface_mapping_to_expr (mapping, expr->ts.cl->length); | |
1529 | } | |
1530 | ||
1531 | /* Apply the mapping to any references. */ | |
1532 | gfc_apply_interface_mapping_to_ref (mapping, expr->ref); | |
1533 | ||
1534 | /* ...and to the expression's symbol, if it has one. */ | |
1535 | if (expr->symtree) | |
1536 | for (sym = mapping->syms; sym; sym = sym->next) | |
1537 | if (sym->old == expr->symtree->n.sym) | |
1538 | expr->symtree = sym->new; | |
1539 | ||
1540 | /* ...and to subexpressions in expr->value. */ | |
1541 | switch (expr->expr_type) | |
1542 | { | |
1543 | case EXPR_VARIABLE: | |
1544 | case EXPR_CONSTANT: | |
1545 | case EXPR_NULL: | |
1546 | case EXPR_SUBSTRING: | |
1547 | break; | |
1548 | ||
1549 | case EXPR_OP: | |
1550 | gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op1); | |
1551 | gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op2); | |
1552 | break; | |
1553 | ||
1554 | case EXPR_FUNCTION: | |
1555 | for (sym = mapping->syms; sym; sym = sym->next) | |
1556 | if (sym->old == expr->value.function.esym) | |
1557 | expr->value.function.esym = sym->new->n.sym; | |
1558 | ||
1559 | for (actual = expr->value.function.actual; actual; actual = actual->next) | |
1560 | gfc_apply_interface_mapping_to_expr (mapping, actual->expr); | |
1561 | break; | |
1562 | ||
1563 | case EXPR_ARRAY: | |
1564 | case EXPR_STRUCTURE: | |
1565 | gfc_apply_interface_mapping_to_cons (mapping, expr->value.constructor); | |
1566 | break; | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | ||
1571 | /* Evaluate interface expression EXPR using MAPPING. Store the result | |
1572 | in SE. */ | |
1573 | ||
f45a476e | 1574 | void |
08569428 | 1575 | gfc_apply_interface_mapping (gfc_interface_mapping * mapping, |
1576 | gfc_se * se, gfc_expr * expr) | |
1577 | { | |
1578 | expr = gfc_copy_expr (expr); | |
1579 | gfc_apply_interface_mapping_to_expr (mapping, expr); | |
1580 | gfc_conv_expr (se, expr); | |
1581 | se->expr = gfc_evaluate_now (se->expr, &se->pre); | |
1582 | gfc_free_expr (expr); | |
1583 | } | |
1584 | ||
858f9894 | 1585 | /* Returns a reference to a temporary array into which a component of |
1586 | an actual argument derived type array is copied and then returned | |
1587 | after the function call. | |
1588 | TODO Get rid of this kludge, when array descriptors are capable of | |
1589 | handling aliased arrays. */ | |
1590 | ||
1591 | static void | |
1592 | gfc_conv_aliased_arg (gfc_se * parmse, gfc_expr * expr, int g77) | |
1593 | { | |
1594 | gfc_se lse; | |
1595 | gfc_se rse; | |
1596 | gfc_ss *lss; | |
1597 | gfc_ss *rss; | |
1598 | gfc_loopinfo loop; | |
1599 | gfc_loopinfo loop2; | |
1600 | gfc_ss_info *info; | |
1601 | tree offset; | |
1602 | tree tmp_index; | |
1603 | tree tmp; | |
1604 | tree base_type; | |
1605 | stmtblock_t body; | |
1606 | int n; | |
1607 | ||
1608 | gcc_assert (expr->expr_type == EXPR_VARIABLE); | |
1609 | ||
1610 | gfc_init_se (&lse, NULL); | |
1611 | gfc_init_se (&rse, NULL); | |
1612 | ||
1613 | /* Walk the argument expression. */ | |
1614 | rss = gfc_walk_expr (expr); | |
1615 | ||
1616 | gcc_assert (rss != gfc_ss_terminator); | |
1617 | ||
1618 | /* Initialize the scalarizer. */ | |
1619 | gfc_init_loopinfo (&loop); | |
1620 | gfc_add_ss_to_loop (&loop, rss); | |
1621 | ||
1622 | /* Calculate the bounds of the scalarization. */ | |
1623 | gfc_conv_ss_startstride (&loop); | |
1624 | ||
1625 | /* Build an ss for the temporary. */ | |
1626 | base_type = gfc_typenode_for_spec (&expr->ts); | |
1627 | if (GFC_ARRAY_TYPE_P (base_type) | |
1628 | || GFC_DESCRIPTOR_TYPE_P (base_type)) | |
1629 | base_type = gfc_get_element_type (base_type); | |
1630 | ||
1631 | loop.temp_ss = gfc_get_ss ();; | |
1632 | loop.temp_ss->type = GFC_SS_TEMP; | |
1633 | loop.temp_ss->data.temp.type = base_type; | |
1634 | ||
1635 | if (expr->ts.type == BT_CHARACTER) | |
1636 | loop.temp_ss->string_length = expr->ts.cl->backend_decl; | |
1637 | ||
1638 | loop.temp_ss->data.temp.dimen = loop.dimen; | |
1639 | loop.temp_ss->next = gfc_ss_terminator; | |
1640 | ||
1641 | /* Associate the SS with the loop. */ | |
1642 | gfc_add_ss_to_loop (&loop, loop.temp_ss); | |
1643 | ||
1644 | /* Setup the scalarizing loops. */ | |
1645 | gfc_conv_loop_setup (&loop); | |
1646 | ||
1647 | /* Pass the temporary descriptor back to the caller. */ | |
1648 | info = &loop.temp_ss->data.info; | |
1649 | parmse->expr = info->descriptor; | |
1650 | ||
1651 | /* Setup the gfc_se structures. */ | |
1652 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
1653 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
1654 | ||
1655 | rse.ss = rss; | |
1656 | lse.ss = loop.temp_ss; | |
1657 | gfc_mark_ss_chain_used (rss, 1); | |
1658 | gfc_mark_ss_chain_used (loop.temp_ss, 1); | |
1659 | ||
1660 | /* Start the scalarized loop body. */ | |
1661 | gfc_start_scalarized_body (&loop, &body); | |
1662 | ||
1663 | /* Translate the expression. */ | |
1664 | gfc_conv_expr (&rse, expr); | |
1665 | ||
1666 | gfc_conv_tmp_array_ref (&lse); | |
1667 | gfc_advance_se_ss_chain (&lse); | |
1668 | ||
1669 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts.type); | |
1670 | gfc_add_expr_to_block (&body, tmp); | |
1671 | ||
1672 | gcc_assert (rse.ss == gfc_ss_terminator); | |
1673 | ||
1674 | gfc_trans_scalarizing_loops (&loop, &body); | |
1675 | ||
1676 | /* Add the post block after the second loop, so that any | |
1677 | freeing of allocated memory is done at the right time. */ | |
1678 | gfc_add_block_to_block (&parmse->pre, &loop.pre); | |
1679 | ||
1680 | /**********Copy the temporary back again.*********/ | |
1681 | ||
1682 | gfc_init_se (&lse, NULL); | |
1683 | gfc_init_se (&rse, NULL); | |
1684 | ||
1685 | /* Walk the argument expression. */ | |
1686 | lss = gfc_walk_expr (expr); | |
1687 | rse.ss = loop.temp_ss; | |
1688 | lse.ss = lss; | |
1689 | ||
1690 | /* Initialize the scalarizer. */ | |
1691 | gfc_init_loopinfo (&loop2); | |
1692 | gfc_add_ss_to_loop (&loop2, lss); | |
1693 | ||
1694 | /* Calculate the bounds of the scalarization. */ | |
1695 | gfc_conv_ss_startstride (&loop2); | |
1696 | ||
1697 | /* Setup the scalarizing loops. */ | |
1698 | gfc_conv_loop_setup (&loop2); | |
1699 | ||
1700 | gfc_copy_loopinfo_to_se (&lse, &loop2); | |
1701 | gfc_copy_loopinfo_to_se (&rse, &loop2); | |
1702 | ||
1703 | gfc_mark_ss_chain_used (lss, 1); | |
1704 | gfc_mark_ss_chain_used (loop.temp_ss, 1); | |
1705 | ||
1706 | /* Declare the variable to hold the temporary offset and start the | |
1707 | scalarized loop body. */ | |
1708 | offset = gfc_create_var (gfc_array_index_type, NULL); | |
1709 | gfc_start_scalarized_body (&loop2, &body); | |
1710 | ||
1711 | /* Build the offsets for the temporary from the loop variables. The | |
1712 | temporary array has lbounds of zero and strides of one in all | |
1713 | dimensions, so this is very simple. The offset is only computed | |
1714 | outside the innermost loop, so the overall transfer could be | |
179eba08 | 1715 | optimized further. */ |
858f9894 | 1716 | info = &rse.ss->data.info; |
1717 | ||
1718 | tmp_index = gfc_index_zero_node; | |
1719 | for (n = info->dimen - 1; n > 0; n--) | |
1720 | { | |
1721 | tree tmp_str; | |
1722 | tmp = rse.loop->loopvar[n]; | |
1723 | tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1724 | tmp, rse.loop->from[n]); | |
1725 | tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1726 | tmp, tmp_index); | |
1727 | ||
1728 | tmp_str = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1729 | rse.loop->to[n-1], rse.loop->from[n-1]); | |
1730 | tmp_str = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1731 | tmp_str, gfc_index_one_node); | |
1732 | ||
1733 | tmp_index = fold_build2 (MULT_EXPR, gfc_array_index_type, | |
1734 | tmp, tmp_str); | |
1735 | } | |
1736 | ||
1737 | tmp_index = fold_build2 (MINUS_EXPR, gfc_array_index_type, | |
1738 | tmp_index, rse.loop->from[0]); | |
1739 | gfc_add_modify_expr (&rse.loop->code[0], offset, tmp_index); | |
1740 | ||
1741 | tmp_index = fold_build2 (PLUS_EXPR, gfc_array_index_type, | |
1742 | rse.loop->loopvar[0], offset); | |
1743 | ||
1744 | /* Now use the offset for the reference. */ | |
1745 | tmp = build_fold_indirect_ref (info->data); | |
1746 | rse.expr = gfc_build_array_ref (tmp, tmp_index); | |
1747 | ||
1748 | if (expr->ts.type == BT_CHARACTER) | |
1749 | rse.string_length = expr->ts.cl->backend_decl; | |
1750 | ||
1751 | gfc_conv_expr (&lse, expr); | |
1752 | ||
1753 | gcc_assert (lse.ss == gfc_ss_terminator); | |
1754 | ||
1755 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts.type); | |
1756 | gfc_add_expr_to_block (&body, tmp); | |
1757 | ||
1758 | /* Generate the copying loops. */ | |
1759 | gfc_trans_scalarizing_loops (&loop2, &body); | |
1760 | ||
1761 | /* Wrap the whole thing up by adding the second loop to the post-block | |
1762 | and following it by the post-block of the fist loop. In this way, | |
1763 | if the temporary needs freeing, it is done after use! */ | |
1764 | gfc_add_block_to_block (&parmse->post, &loop2.pre); | |
1765 | gfc_add_block_to_block (&parmse->post, &loop2.post); | |
1766 | ||
1767 | gfc_add_block_to_block (&parmse->post, &loop.post); | |
1768 | ||
1769 | gfc_cleanup_loop (&loop); | |
1770 | gfc_cleanup_loop (&loop2); | |
1771 | ||
1772 | /* Pass the string length to the argument expression. */ | |
1773 | if (expr->ts.type == BT_CHARACTER) | |
1774 | parmse->string_length = expr->ts.cl->backend_decl; | |
1775 | ||
1776 | /* We want either the address for the data or the address of the descriptor, | |
1777 | depending on the mode of passing array arguments. */ | |
1778 | if (g77) | |
1779 | parmse->expr = gfc_conv_descriptor_data_get (parmse->expr); | |
1780 | else | |
1781 | parmse->expr = build_fold_addr_expr (parmse->expr); | |
1782 | ||
1783 | return; | |
1784 | } | |
1785 | ||
1786 | /* Is true if the last array reference is followed by a component reference. */ | |
1787 | ||
1788 | static bool | |
1789 | is_aliased_array (gfc_expr * e) | |
1790 | { | |
1791 | gfc_ref * ref; | |
1792 | bool seen_array; | |
1793 | ||
1794 | seen_array = false; | |
1795 | for (ref = e->ref; ref; ref = ref->next) | |
1796 | { | |
1797 | if (ref->type == REF_ARRAY) | |
1798 | seen_array = true; | |
1799 | ||
1800 | if (ref->next == NULL && ref->type == REF_COMPONENT) | |
1801 | return seen_array; | |
1802 | } | |
1803 | return false; | |
1804 | } | |
08569428 | 1805 | |
4ee9c684 | 1806 | /* Generate code for a procedure call. Note can return se->post != NULL. |
079d21d5 | 1807 | If se->direct_byref is set then se->expr contains the return parameter. |
89d91d02 | 1808 | Return nonzero, if the call has alternate specifiers. */ |
4ee9c684 | 1809 | |
079d21d5 | 1810 | int |
4ee9c684 | 1811 | gfc_conv_function_call (gfc_se * se, gfc_symbol * sym, |
1812 | gfc_actual_arglist * arg) | |
1813 | { | |
08569428 | 1814 | gfc_interface_mapping mapping; |
4ee9c684 | 1815 | tree arglist; |
08569428 | 1816 | tree retargs; |
4ee9c684 | 1817 | tree tmp; |
1818 | tree fntype; | |
1819 | gfc_se parmse; | |
1820 | gfc_ss *argss; | |
1821 | gfc_ss_info *info; | |
1822 | int byref; | |
1823 | tree type; | |
1824 | tree var; | |
1825 | tree len; | |
1826 | tree stringargs; | |
1827 | gfc_formal_arglist *formal; | |
079d21d5 | 1828 | int has_alternate_specifier = 0; |
08569428 | 1829 | bool need_interface_mapping; |
d4ef6f9d | 1830 | bool callee_alloc; |
08569428 | 1831 | gfc_typespec ts; |
1832 | gfc_charlen cl; | |
bd24f178 | 1833 | gfc_expr *e; |
1834 | gfc_symbol *fsym; | |
10b07432 | 1835 | stmtblock_t post; |
4ee9c684 | 1836 | |
1837 | arglist = NULL_TREE; | |
08569428 | 1838 | retargs = NULL_TREE; |
4ee9c684 | 1839 | stringargs = NULL_TREE; |
1840 | var = NULL_TREE; | |
1841 | len = NULL_TREE; | |
1842 | ||
1843 | if (se->ss != NULL) | |
1844 | { | |
1845 | if (!sym->attr.elemental) | |
1846 | { | |
22d678e8 | 1847 | gcc_assert (se->ss->type == GFC_SS_FUNCTION); |
4ee9c684 | 1848 | if (se->ss->useflags) |
1849 | { | |
22d678e8 | 1850 | gcc_assert (gfc_return_by_reference (sym) |
4ee9c684 | 1851 | && sym->result->attr.dimension); |
22d678e8 | 1852 | gcc_assert (se->loop != NULL); |
4ee9c684 | 1853 | |
1854 | /* Access the previously obtained result. */ | |
1855 | gfc_conv_tmp_array_ref (se); | |
1856 | gfc_advance_se_ss_chain (se); | |
079d21d5 | 1857 | return 0; |
4ee9c684 | 1858 | } |
1859 | } | |
1860 | info = &se->ss->data.info; | |
1861 | } | |
1862 | else | |
1863 | info = NULL; | |
1864 | ||
10b07432 | 1865 | gfc_init_block (&post); |
08569428 | 1866 | gfc_init_interface_mapping (&mapping); |
f45a476e | 1867 | need_interface_mapping = ((sym->ts.type == BT_CHARACTER |
5e8cd291 | 1868 | && sym->ts.cl->length |
1869 | && sym->ts.cl->length->expr_type | |
1870 | != EXPR_CONSTANT) | |
1871 | || sym->attr.dimension); | |
4ee9c684 | 1872 | formal = sym->formal; |
1873 | /* Evaluate the arguments. */ | |
1874 | for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL) | |
1875 | { | |
bd24f178 | 1876 | e = arg->expr; |
1877 | fsym = formal ? formal->sym : NULL; | |
1878 | if (e == NULL) | |
4ee9c684 | 1879 | { |
1880 | ||
1881 | if (se->ignore_optional) | |
1882 | { | |
1883 | /* Some intrinsics have already been resolved to the correct | |
1884 | parameters. */ | |
1885 | continue; | |
1886 | } | |
1887 | else if (arg->label) | |
1888 | { | |
1889 | has_alternate_specifier = 1; | |
1890 | continue; | |
1891 | } | |
1892 | else | |
1893 | { | |
1894 | /* Pass a NULL pointer for an absent arg. */ | |
1895 | gfc_init_se (&parmse, NULL); | |
1896 | parmse.expr = null_pointer_node; | |
0fe9e56f | 1897 | if (arg->missing_arg_type == BT_CHARACTER) |
08569428 | 1898 | parmse.string_length = convert (gfc_charlen_type_node, |
1899 | integer_zero_node); | |
4ee9c684 | 1900 | } |
1901 | } | |
1902 | else if (se->ss && se->ss->useflags) | |
1903 | { | |
1904 | /* An elemental function inside a scalarized loop. */ | |
1905 | gfc_init_se (&parmse, se); | |
bd24f178 | 1906 | gfc_conv_expr_reference (&parmse, e); |
4ee9c684 | 1907 | } |
1908 | else | |
1909 | { | |
1910 | /* A scalar or transformational function. */ | |
1911 | gfc_init_se (&parmse, NULL); | |
bd24f178 | 1912 | argss = gfc_walk_expr (e); |
4ee9c684 | 1913 | |
1914 | if (argss == gfc_ss_terminator) | |
1915 | { | |
bd24f178 | 1916 | gfc_conv_expr_reference (&parmse, e); |
1917 | if (fsym && fsym->attr.pointer | |
1918 | && e->expr_type != EXPR_NULL) | |
4ee9c684 | 1919 | { |
1920 | /* Scalar pointer dummy args require an extra level of | |
bf7e666b | 1921 | indirection. The null pointer already contains |
1922 | this level of indirection. */ | |
9596685a | 1923 | parmse.expr = build_fold_addr_expr (parmse.expr); |
4ee9c684 | 1924 | } |
1925 | } | |
1926 | else | |
1927 | { | |
7d19e94d | 1928 | /* If the procedure requires an explicit interface, the actual |
1929 | argument is passed according to the corresponding formal | |
1930 | argument. If the corresponding formal argument is a POINTER, | |
1931 | ALLOCATABLE or assumed shape, we do not use g77's calling | |
1932 | convention, and pass the address of the array descriptor | |
1933 | instead. Otherwise we use g77's calling convention. */ | |
4ee9c684 | 1934 | int f; |
bd24f178 | 1935 | f = (fsym != NULL) |
1936 | && !(fsym->attr.pointer || fsym->attr.allocatable) | |
1937 | && fsym->as->type != AS_ASSUMED_SHAPE; | |
4ee9c684 | 1938 | f = f || !sym->attr.always_explicit; |
bd24f178 | 1939 | if (e->expr_type == EXPR_VARIABLE |
1940 | && is_aliased_array (e)) | |
858f9894 | 1941 | /* The actual argument is a component reference to an |
1942 | array of derived types. In this case, the argument | |
1943 | is converted to a temporary, which is passed and then | |
1944 | written back after the procedure call. */ | |
bd24f178 | 1945 | gfc_conv_aliased_arg (&parmse, e, f); |
858f9894 | 1946 | else |
bd24f178 | 1947 | gfc_conv_array_parameter (&parmse, e, argss, f); |
ab19f982 | 1948 | |
1949 | /* If an ALLOCATABLE dummy argument has INTENT(OUT) and is | |
1950 | allocated on entry, it must be deallocated. */ | |
bd24f178 | 1951 | if (fsym && fsym->attr.allocatable |
1952 | && fsym->attr.intent == INTENT_OUT) | |
ab19f982 | 1953 | { |
bd24f178 | 1954 | tmp = e->symtree->n.sym->backend_decl; |
1955 | if (e->symtree->n.sym->attr.dummy) | |
f135d1ce | 1956 | tmp = build_fold_indirect_ref (tmp); |
1957 | tmp = gfc_trans_dealloc_allocated (tmp); | |
ab19f982 | 1958 | gfc_add_expr_to_block (&se->pre, tmp); |
1959 | } | |
1960 | ||
4ee9c684 | 1961 | } |
1962 | } | |
1963 | ||
bd24f178 | 1964 | /* If an optional argument is itself an optional dummy argument, |
1965 | check its presence and substitute a null if absent. */ | |
1966 | if (e && e->expr_type == EXPR_VARIABLE | |
1967 | && e->symtree->n.sym->attr.optional | |
1968 | && fsym && fsym->attr.optional) | |
1969 | gfc_conv_missing_dummy (&parmse, e, fsym->ts); | |
1970 | ||
1971 | if (fsym && need_interface_mapping) | |
1972 | gfc_add_interface_mapping (&mapping, fsym, &parmse); | |
08569428 | 1973 | |
4ee9c684 | 1974 | gfc_add_block_to_block (&se->pre, &parmse.pre); |
10b07432 | 1975 | gfc_add_block_to_block (&post, &parmse.post); |
4ee9c684 | 1976 | |
7b3423b9 | 1977 | /* Character strings are passed as two parameters, a length and a |
4ee9c684 | 1978 | pointer. */ |
1979 | if (parmse.string_length != NULL_TREE) | |
1980 | stringargs = gfc_chainon_list (stringargs, parmse.string_length); | |
1981 | ||
1982 | arglist = gfc_chainon_list (arglist, parmse.expr); | |
1983 | } | |
08569428 | 1984 | gfc_finish_interface_mapping (&mapping, &se->pre, &se->post); |
1985 | ||
1986 | ts = sym->ts; | |
1987 | if (ts.type == BT_CHARACTER) | |
1988 | { | |
5e8cd291 | 1989 | if (sym->ts.cl->length == NULL) |
1990 | { | |
1991 | /* Assumed character length results are not allowed by 5.1.1.5 of the | |
1992 | standard and are trapped in resolve.c; except in the case of SPREAD | |
1993 | (and other intrinsics?). In this case, we take the character length | |
1994 | of the first argument for the result. */ | |
1995 | cl.backend_decl = TREE_VALUE (stringargs); | |
1996 | } | |
08569428 | 1997 | else |
5e8cd291 | 1998 | { |
1999 | /* Calculate the length of the returned string. */ | |
2000 | gfc_init_se (&parmse, NULL); | |
2001 | if (need_interface_mapping) | |
2002 | gfc_apply_interface_mapping (&mapping, &parmse, sym->ts.cl->length); | |
2003 | else | |
2004 | gfc_conv_expr (&parmse, sym->ts.cl->length); | |
2005 | gfc_add_block_to_block (&se->pre, &parmse.pre); | |
2006 | gfc_add_block_to_block (&se->post, &parmse.post); | |
2007 | cl.backend_decl = fold_convert (gfc_charlen_type_node, parmse.expr); | |
2008 | } | |
08569428 | 2009 | |
2010 | /* Set up a charlen structure for it. */ | |
2011 | cl.next = NULL; | |
2012 | cl.length = NULL; | |
08569428 | 2013 | ts.cl = &cl; |
2014 | ||
2015 | len = cl.backend_decl; | |
2016 | } | |
08569428 | 2017 | |
2018 | byref = gfc_return_by_reference (sym); | |
2019 | if (byref) | |
2020 | { | |
2021 | if (se->direct_byref) | |
2022 | retargs = gfc_chainon_list (retargs, se->expr); | |
2023 | else if (sym->result->attr.dimension) | |
2024 | { | |
2025 | gcc_assert (se->loop && info); | |
2026 | ||
2027 | /* Set the type of the array. */ | |
2028 | tmp = gfc_typenode_for_spec (&ts); | |
2029 | info->dimen = se->loop->dimen; | |
2030 | ||
f45a476e | 2031 | /* Evaluate the bounds of the result, if known. */ |
2032 | gfc_set_loop_bounds_from_array_spec (&mapping, se, sym->result->as); | |
2033 | ||
d4ef6f9d | 2034 | /* Create a temporary to store the result. In case the function |
2035 | returns a pointer, the temporary will be a shallow copy and | |
2036 | mustn't be deallocated. */ | |
2037 | callee_alloc = sym->attr.allocatable || sym->attr.pointer; | |
2038 | gfc_trans_create_temp_array (&se->pre, &se->post, se->loop, info, tmp, | |
2039 | false, !sym->attr.pointer, callee_alloc); | |
08569428 | 2040 | |
08569428 | 2041 | /* Pass the temporary as the first argument. */ |
2042 | tmp = info->descriptor; | |
9596685a | 2043 | tmp = build_fold_addr_expr (tmp); |
08569428 | 2044 | retargs = gfc_chainon_list (retargs, tmp); |
2045 | } | |
2046 | else if (ts.type == BT_CHARACTER) | |
2047 | { | |
2048 | /* Pass the string length. */ | |
2049 | type = gfc_get_character_type (ts.kind, ts.cl); | |
2050 | type = build_pointer_type (type); | |
2051 | ||
2052 | /* Return an address to a char[0:len-1]* temporary for | |
2053 | character pointers. */ | |
2054 | if (sym->attr.pointer || sym->attr.allocatable) | |
2055 | { | |
2056 | /* Build char[0:len-1] * pstr. */ | |
2057 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, | |
2058 | build_int_cst (gfc_charlen_type_node, 1)); | |
2059 | tmp = build_range_type (gfc_array_index_type, | |
2060 | gfc_index_zero_node, tmp); | |
2061 | tmp = build_array_type (gfc_character1_type_node, tmp); | |
2062 | var = gfc_create_var (build_pointer_type (tmp), "pstr"); | |
2063 | ||
2064 | /* Provide an address expression for the function arguments. */ | |
9596685a | 2065 | var = build_fold_addr_expr (var); |
08569428 | 2066 | } |
2067 | else | |
2068 | var = gfc_conv_string_tmp (se, type, len); | |
2069 | ||
2070 | retargs = gfc_chainon_list (retargs, var); | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | gcc_assert (gfc_option.flag_f2c && ts.type == BT_COMPLEX); | |
2075 | ||
2076 | type = gfc_get_complex_type (ts.kind); | |
9596685a | 2077 | var = build_fold_addr_expr (gfc_create_var (type, "cmplx")); |
08569428 | 2078 | retargs = gfc_chainon_list (retargs, var); |
2079 | } | |
2080 | ||
2081 | /* Add the string length to the argument list. */ | |
2082 | if (ts.type == BT_CHARACTER) | |
2083 | retargs = gfc_chainon_list (retargs, len); | |
2084 | } | |
f45a476e | 2085 | gfc_free_interface_mapping (&mapping); |
08569428 | 2086 | |
2087 | /* Add the return arguments. */ | |
2088 | arglist = chainon (retargs, arglist); | |
4ee9c684 | 2089 | |
2090 | /* Add the hidden string length parameters to the arguments. */ | |
2091 | arglist = chainon (arglist, stringargs); | |
2092 | ||
2093 | /* Generate the actual call. */ | |
2094 | gfc_conv_function_val (se, sym); | |
2095 | /* If there are alternate return labels, function type should be | |
079d21d5 | 2096 | integer. Can't modify the type in place though, since it can be shared |
2097 | with other functions. */ | |
2098 | if (has_alternate_specifier | |
2099 | && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) != integer_type_node) | |
2100 | { | |
2101 | gcc_assert (! sym->attr.dummy); | |
2102 | TREE_TYPE (sym->backend_decl) | |
2103 | = build_function_type (integer_type_node, | |
2104 | TYPE_ARG_TYPES (TREE_TYPE (sym->backend_decl))); | |
9596685a | 2105 | se->expr = build_fold_addr_expr (sym->backend_decl); |
079d21d5 | 2106 | } |
4ee9c684 | 2107 | |
2108 | fntype = TREE_TYPE (TREE_TYPE (se->expr)); | |
ed52ef8b | 2109 | se->expr = build3 (CALL_EXPR, TREE_TYPE (fntype), se->expr, |
2110 | arglist, NULL_TREE); | |
4ee9c684 | 2111 | |
fa069004 | 2112 | /* If we have a pointer function, but we don't want a pointer, e.g. |
2113 | something like | |
2114 | x = f() | |
2115 | where f is pointer valued, we have to dereference the result. */ | |
bdaed7d2 | 2116 | if (!se->want_pointer && !byref && sym->attr.pointer) |
4fa2c167 | 2117 | se->expr = build_fold_indirect_ref (se->expr); |
fa069004 | 2118 | |
bdaed7d2 | 2119 | /* f2c calling conventions require a scalar default real function to |
2120 | return a double precision result. Convert this back to default | |
2121 | real. We only care about the cases that can happen in Fortran 77. | |
2122 | */ | |
2123 | if (gfc_option.flag_f2c && sym->ts.type == BT_REAL | |
2124 | && sym->ts.kind == gfc_default_real_kind | |
2125 | && !sym->attr.always_explicit) | |
2126 | se->expr = fold_convert (gfc_get_real_type (sym->ts.kind), se->expr); | |
2127 | ||
f888a3fb | 2128 | /* A pure function may still have side-effects - it may modify its |
2129 | parameters. */ | |
4ee9c684 | 2130 | TREE_SIDE_EFFECTS (se->expr) = 1; |
2131 | #if 0 | |
2132 | if (!sym->attr.pure) | |
2133 | TREE_SIDE_EFFECTS (se->expr) = 1; | |
2134 | #endif | |
2135 | ||
4396343e | 2136 | if (byref) |
4ee9c684 | 2137 | { |
4396343e | 2138 | /* Add the function call to the pre chain. There is no expression. */ |
4ee9c684 | 2139 | gfc_add_expr_to_block (&se->pre, se->expr); |
4396343e | 2140 | se->expr = NULL_TREE; |
4ee9c684 | 2141 | |
4396343e | 2142 | if (!se->direct_byref) |
4ee9c684 | 2143 | { |
65cf6ae7 | 2144 | if (sym->attr.dimension) |
4ee9c684 | 2145 | { |
4396343e | 2146 | if (flag_bounds_check) |
2147 | { | |
2148 | /* Check the data pointer hasn't been modified. This would | |
2149 | happen in a function returning a pointer. */ | |
94be45c9 | 2150 | tmp = gfc_conv_descriptor_data_get (info->descriptor); |
0eed5ee7 | 2151 | tmp = fold_build2 (NE_EXPR, boolean_type_node, |
2152 | tmp, info->data); | |
4396343e | 2153 | gfc_trans_runtime_check (tmp, gfc_strconst_fault, &se->pre); |
2154 | } | |
2155 | se->expr = info->descriptor; | |
bf7e666b | 2156 | /* Bundle in the string length. */ |
2157 | se->string_length = len; | |
4ee9c684 | 2158 | } |
4396343e | 2159 | else if (sym->ts.type == BT_CHARACTER) |
544c333b | 2160 | { |
bf7e666b | 2161 | /* Dereference for character pointer results. */ |
2162 | if (sym->attr.pointer || sym->attr.allocatable) | |
4fa2c167 | 2163 | se->expr = build_fold_indirect_ref (var); |
544c333b | 2164 | else |
bf7e666b | 2165 | se->expr = var; |
2166 | ||
4396343e | 2167 | se->string_length = len; |
2168 | } | |
2169 | else | |
bdaed7d2 | 2170 | { |
2171 | gcc_assert (sym->ts.type == BT_COMPLEX && gfc_option.flag_f2c); | |
4fa2c167 | 2172 | se->expr = build_fold_indirect_ref (var); |
bdaed7d2 | 2173 | } |
4ee9c684 | 2174 | } |
4ee9c684 | 2175 | } |
079d21d5 | 2176 | |
10b07432 | 2177 | /* Follow the function call with the argument post block. */ |
2178 | if (byref) | |
2179 | gfc_add_block_to_block (&se->pre, &post); | |
2180 | else | |
2181 | gfc_add_block_to_block (&se->post, &post); | |
2182 | ||
079d21d5 | 2183 | return has_alternate_specifier; |
4ee9c684 | 2184 | } |
2185 | ||
2186 | ||
dbe60343 | 2187 | /* Generate code to copy a string. */ |
2188 | ||
2189 | static void | |
2190 | gfc_trans_string_copy (stmtblock_t * block, tree dlen, tree dest, | |
2191 | tree slen, tree src) | |
2192 | { | |
2193 | tree tmp; | |
77100724 | 2194 | tree dsc; |
2195 | tree ssc; | |
2196 | ||
2197 | /* Deal with single character specially. */ | |
2198 | dsc = gfc_to_single_character (dlen, dest); | |
2199 | ssc = gfc_to_single_character (slen, src); | |
2200 | if (dsc != NULL_TREE && ssc != NULL_TREE) | |
2201 | { | |
2202 | gfc_add_modify_expr (block, dsc, ssc); | |
2203 | return; | |
2204 | } | |
dbe60343 | 2205 | |
2206 | tmp = NULL_TREE; | |
2207 | tmp = gfc_chainon_list (tmp, dlen); | |
2208 | tmp = gfc_chainon_list (tmp, dest); | |
2209 | tmp = gfc_chainon_list (tmp, slen); | |
2210 | tmp = gfc_chainon_list (tmp, src); | |
ac47d547 | 2211 | tmp = build_function_call_expr (gfor_fndecl_copy_string, tmp); |
dbe60343 | 2212 | gfc_add_expr_to_block (block, tmp); |
2213 | } | |
2214 | ||
2215 | ||
4ee9c684 | 2216 | /* Translate a statement function. |
2217 | The value of a statement function reference is obtained by evaluating the | |
2218 | expression using the values of the actual arguments for the values of the | |
2219 | corresponding dummy arguments. */ | |
2220 | ||
2221 | static void | |
2222 | gfc_conv_statement_function (gfc_se * se, gfc_expr * expr) | |
2223 | { | |
2224 | gfc_symbol *sym; | |
2225 | gfc_symbol *fsym; | |
2226 | gfc_formal_arglist *fargs; | |
2227 | gfc_actual_arglist *args; | |
2228 | gfc_se lse; | |
2229 | gfc_se rse; | |
dbe60343 | 2230 | gfc_saved_var *saved_vars; |
2231 | tree *temp_vars; | |
2232 | tree type; | |
2233 | tree tmp; | |
2234 | int n; | |
4ee9c684 | 2235 | |
2236 | sym = expr->symtree->n.sym; | |
2237 | args = expr->value.function.actual; | |
2238 | gfc_init_se (&lse, NULL); | |
2239 | gfc_init_se (&rse, NULL); | |
2240 | ||
dbe60343 | 2241 | n = 0; |
4ee9c684 | 2242 | for (fargs = sym->formal; fargs; fargs = fargs->next) |
dbe60343 | 2243 | n++; |
2244 | saved_vars = (gfc_saved_var *)gfc_getmem (n * sizeof (gfc_saved_var)); | |
2245 | temp_vars = (tree *)gfc_getmem (n * sizeof (tree)); | |
2246 | ||
2247 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) | |
4ee9c684 | 2248 | { |
2249 | /* Each dummy shall be specified, explicitly or implicitly, to be | |
2250 | scalar. */ | |
22d678e8 | 2251 | gcc_assert (fargs->sym->attr.dimension == 0); |
4ee9c684 | 2252 | fsym = fargs->sym; |
4ee9c684 | 2253 | |
dbe60343 | 2254 | /* Create a temporary to hold the value. */ |
2255 | type = gfc_typenode_for_spec (&fsym->ts); | |
2256 | temp_vars[n] = gfc_create_var (type, fsym->name); | |
2257 | ||
2258 | if (fsym->ts.type == BT_CHARACTER) | |
4ee9c684 | 2259 | { |
dbe60343 | 2260 | /* Copy string arguments. */ |
2261 | tree arglen; | |
4ee9c684 | 2262 | |
22d678e8 | 2263 | gcc_assert (fsym->ts.cl && fsym->ts.cl->length |
4ee9c684 | 2264 | && fsym->ts.cl->length->expr_type == EXPR_CONSTANT); |
2265 | ||
dbe60343 | 2266 | arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
2267 | tmp = gfc_build_addr_expr (build_pointer_type (type), | |
2268 | temp_vars[n]); | |
4ee9c684 | 2269 | |
2270 | gfc_conv_expr (&rse, args->expr); | |
2271 | gfc_conv_string_parameter (&rse); | |
4ee9c684 | 2272 | gfc_add_block_to_block (&se->pre, &lse.pre); |
2273 | gfc_add_block_to_block (&se->pre, &rse.pre); | |
2274 | ||
dbe60343 | 2275 | gfc_trans_string_copy (&se->pre, arglen, tmp, rse.string_length, |
2276 | rse.expr); | |
4ee9c684 | 2277 | gfc_add_block_to_block (&se->pre, &lse.post); |
2278 | gfc_add_block_to_block (&se->pre, &rse.post); | |
2279 | } | |
2280 | else | |
2281 | { | |
2282 | /* For everything else, just evaluate the expression. */ | |
4ee9c684 | 2283 | gfc_conv_expr (&lse, args->expr); |
2284 | ||
2285 | gfc_add_block_to_block (&se->pre, &lse.pre); | |
dbe60343 | 2286 | gfc_add_modify_expr (&se->pre, temp_vars[n], lse.expr); |
4ee9c684 | 2287 | gfc_add_block_to_block (&se->pre, &lse.post); |
2288 | } | |
dbe60343 | 2289 | |
4ee9c684 | 2290 | args = args->next; |
2291 | } | |
dbe60343 | 2292 | |
2293 | /* Use the temporary variables in place of the real ones. */ | |
2294 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) | |
2295 | gfc_shadow_sym (fargs->sym, temp_vars[n], &saved_vars[n]); | |
2296 | ||
4ee9c684 | 2297 | gfc_conv_expr (se, sym->value); |
dbe60343 | 2298 | |
2299 | if (sym->ts.type == BT_CHARACTER) | |
2300 | { | |
2301 | gfc_conv_const_charlen (sym->ts.cl); | |
2302 | ||
2303 | /* Force the expression to the correct length. */ | |
2304 | if (!INTEGER_CST_P (se->string_length) | |
2305 | || tree_int_cst_lt (se->string_length, | |
2306 | sym->ts.cl->backend_decl)) | |
2307 | { | |
2308 | type = gfc_get_character_type (sym->ts.kind, sym->ts.cl); | |
2309 | tmp = gfc_create_var (type, sym->name); | |
2310 | tmp = gfc_build_addr_expr (build_pointer_type (type), tmp); | |
2311 | gfc_trans_string_copy (&se->pre, sym->ts.cl->backend_decl, tmp, | |
2312 | se->string_length, se->expr); | |
2313 | se->expr = tmp; | |
2314 | } | |
2315 | se->string_length = sym->ts.cl->backend_decl; | |
2316 | } | |
2317 | ||
f888a3fb | 2318 | /* Restore the original variables. */ |
dbe60343 | 2319 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) |
2320 | gfc_restore_sym (fargs->sym, &saved_vars[n]); | |
2321 | gfc_free (saved_vars); | |
4ee9c684 | 2322 | } |
2323 | ||
2324 | ||
2325 | /* Translate a function expression. */ | |
2326 | ||
2327 | static void | |
2328 | gfc_conv_function_expr (gfc_se * se, gfc_expr * expr) | |
2329 | { | |
2330 | gfc_symbol *sym; | |
2331 | ||
2332 | if (expr->value.function.isym) | |
2333 | { | |
2334 | gfc_conv_intrinsic_function (se, expr); | |
2335 | return; | |
2336 | } | |
2337 | ||
f888a3fb | 2338 | /* We distinguish statement functions from general functions to improve |
4ee9c684 | 2339 | runtime performance. */ |
2340 | if (expr->symtree->n.sym->attr.proc == PROC_ST_FUNCTION) | |
2341 | { | |
2342 | gfc_conv_statement_function (se, expr); | |
2343 | return; | |
2344 | } | |
2345 | ||
2346 | /* expr.value.function.esym is the resolved (specific) function symbol for | |
2347 | most functions. However this isn't set for dummy procedures. */ | |
2348 | sym = expr->value.function.esym; | |
2349 | if (!sym) | |
2350 | sym = expr->symtree->n.sym; | |
2351 | gfc_conv_function_call (se, sym, expr->value.function.actual); | |
2352 | } | |
2353 | ||
f888a3fb | 2354 | |
4ee9c684 | 2355 | static void |
2356 | gfc_conv_array_constructor_expr (gfc_se * se, gfc_expr * expr) | |
2357 | { | |
22d678e8 | 2358 | gcc_assert (se->ss != NULL && se->ss != gfc_ss_terminator); |
2359 | gcc_assert (se->ss->expr == expr && se->ss->type == GFC_SS_CONSTRUCTOR); | |
4ee9c684 | 2360 | |
2361 | gfc_conv_tmp_array_ref (se); | |
2362 | gfc_advance_se_ss_chain (se); | |
2363 | } | |
2364 | ||
2365 | ||
bda1f152 | 2366 | /* Build a static initializer. EXPR is the expression for the initial value. |
f888a3fb | 2367 | The other parameters describe the variable of the component being |
2368 | initialized. EXPR may be null. */ | |
4ee9c684 | 2369 | |
bda1f152 | 2370 | tree |
2371 | gfc_conv_initializer (gfc_expr * expr, gfc_typespec * ts, tree type, | |
2372 | bool array, bool pointer) | |
2373 | { | |
2374 | gfc_se se; | |
2375 | ||
2376 | if (!(expr || pointer)) | |
2377 | return NULL_TREE; | |
2378 | ||
2379 | if (array) | |
2380 | { | |
2381 | /* Arrays need special handling. */ | |
2382 | if (pointer) | |
2383 | return gfc_build_null_descriptor (type); | |
2384 | else | |
2385 | return gfc_conv_array_initializer (type, expr); | |
2386 | } | |
2387 | else if (pointer) | |
2388 | return fold_convert (type, null_pointer_node); | |
2389 | else | |
2390 | { | |
2391 | switch (ts->type) | |
2392 | { | |
2393 | case BT_DERIVED: | |
2394 | gfc_init_se (&se, NULL); | |
2395 | gfc_conv_structure (&se, expr, 1); | |
2396 | return se.expr; | |
2397 | ||
2398 | case BT_CHARACTER: | |
2399 | return gfc_conv_string_init (ts->cl->backend_decl,expr); | |
2400 | ||
2401 | default: | |
2402 | gfc_init_se (&se, NULL); | |
2403 | gfc_conv_constant (&se, expr); | |
2404 | return se.expr; | |
2405 | } | |
2406 | } | |
2407 | } | |
2408 | ||
9a0aec1d | 2409 | static tree |
2410 | gfc_trans_subarray_assign (tree dest, gfc_component * cm, gfc_expr * expr) | |
2411 | { | |
2412 | gfc_se rse; | |
2413 | gfc_se lse; | |
2414 | gfc_ss *rss; | |
2415 | gfc_ss *lss; | |
2416 | stmtblock_t body; | |
2417 | stmtblock_t block; | |
2418 | gfc_loopinfo loop; | |
2419 | int n; | |
2420 | tree tmp; | |
2421 | ||
2422 | gfc_start_block (&block); | |
2423 | ||
2424 | /* Initialize the scalarizer. */ | |
2425 | gfc_init_loopinfo (&loop); | |
2426 | ||
2427 | gfc_init_se (&lse, NULL); | |
2428 | gfc_init_se (&rse, NULL); | |
2429 | ||
2430 | /* Walk the rhs. */ | |
2431 | rss = gfc_walk_expr (expr); | |
2432 | if (rss == gfc_ss_terminator) | |
2433 | { | |
2434 | /* The rhs is scalar. Add a ss for the expression. */ | |
2435 | rss = gfc_get_ss (); | |
2436 | rss->next = gfc_ss_terminator; | |
2437 | rss->type = GFC_SS_SCALAR; | |
2438 | rss->expr = expr; | |
2439 | } | |
2440 | ||
2441 | /* Create a SS for the destination. */ | |
2442 | lss = gfc_get_ss (); | |
2443 | lss->type = GFC_SS_COMPONENT; | |
2444 | lss->expr = NULL; | |
2445 | lss->shape = gfc_get_shape (cm->as->rank); | |
2446 | lss->next = gfc_ss_terminator; | |
2447 | lss->data.info.dimen = cm->as->rank; | |
2448 | lss->data.info.descriptor = dest; | |
2449 | lss->data.info.data = gfc_conv_array_data (dest); | |
2450 | lss->data.info.offset = gfc_conv_array_offset (dest); | |
2451 | for (n = 0; n < cm->as->rank; n++) | |
2452 | { | |
2453 | lss->data.info.dim[n] = n; | |
2454 | lss->data.info.start[n] = gfc_conv_array_lbound (dest, n); | |
2455 | lss->data.info.stride[n] = gfc_index_one_node; | |
2456 | ||
2457 | mpz_init (lss->shape[n]); | |
2458 | mpz_sub (lss->shape[n], cm->as->upper[n]->value.integer, | |
2459 | cm->as->lower[n]->value.integer); | |
2460 | mpz_add_ui (lss->shape[n], lss->shape[n], 1); | |
2461 | } | |
2462 | ||
2463 | /* Associate the SS with the loop. */ | |
2464 | gfc_add_ss_to_loop (&loop, lss); | |
2465 | gfc_add_ss_to_loop (&loop, rss); | |
2466 | ||
2467 | /* Calculate the bounds of the scalarization. */ | |
2468 | gfc_conv_ss_startstride (&loop); | |
2469 | ||
2470 | /* Setup the scalarizing loops. */ | |
2471 | gfc_conv_loop_setup (&loop); | |
2472 | ||
2473 | /* Setup the gfc_se structures. */ | |
2474 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
2475 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
2476 | ||
2477 | rse.ss = rss; | |
2478 | gfc_mark_ss_chain_used (rss, 1); | |
2479 | lse.ss = lss; | |
2480 | gfc_mark_ss_chain_used (lss, 1); | |
2481 | ||
2482 | /* Start the scalarized loop body. */ | |
2483 | gfc_start_scalarized_body (&loop, &body); | |
2484 | ||
2485 | gfc_conv_tmp_array_ref (&lse); | |
dc5fe211 | 2486 | if (cm->ts.type == BT_CHARACTER) |
2487 | lse.string_length = cm->ts.cl->backend_decl; | |
2488 | ||
9a0aec1d | 2489 | gfc_conv_expr (&rse, expr); |
2490 | ||
2491 | tmp = gfc_trans_scalar_assign (&lse, &rse, cm->ts.type); | |
2492 | gfc_add_expr_to_block (&body, tmp); | |
2493 | ||
22d678e8 | 2494 | gcc_assert (rse.ss == gfc_ss_terminator); |
9a0aec1d | 2495 | |
2496 | /* Generate the copying loops. */ | |
2497 | gfc_trans_scalarizing_loops (&loop, &body); | |
2498 | ||
2499 | /* Wrap the whole thing up. */ | |
2500 | gfc_add_block_to_block (&block, &loop.pre); | |
2501 | gfc_add_block_to_block (&block, &loop.post); | |
2502 | ||
9a0aec1d | 2503 | for (n = 0; n < cm->as->rank; n++) |
2504 | mpz_clear (lss->shape[n]); | |
2505 | gfc_free (lss->shape); | |
2506 | ||
6cf06ccd | 2507 | gfc_cleanup_loop (&loop); |
2508 | ||
9a0aec1d | 2509 | return gfc_finish_block (&block); |
2510 | } | |
2511 | ||
2512 | /* Assign a single component of a derived type constructor. */ | |
2513 | ||
2514 | static tree | |
2515 | gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr) | |
2516 | { | |
2517 | gfc_se se; | |
2518 | gfc_ss *rss; | |
2519 | stmtblock_t block; | |
2520 | tree tmp; | |
2521 | ||
2522 | gfc_start_block (&block); | |
2523 | if (cm->pointer) | |
2524 | { | |
2525 | gfc_init_se (&se, NULL); | |
2526 | /* Pointer component. */ | |
2527 | if (cm->dimension) | |
2528 | { | |
2529 | /* Array pointer. */ | |
2530 | if (expr->expr_type == EXPR_NULL) | |
94be45c9 | 2531 | gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
9a0aec1d | 2532 | else |
2533 | { | |
2534 | rss = gfc_walk_expr (expr); | |
2535 | se.direct_byref = 1; | |
2536 | se.expr = dest; | |
2537 | gfc_conv_expr_descriptor (&se, expr, rss); | |
2538 | gfc_add_block_to_block (&block, &se.pre); | |
2539 | gfc_add_block_to_block (&block, &se.post); | |
2540 | } | |
2541 | } | |
2542 | else | |
2543 | { | |
2544 | /* Scalar pointers. */ | |
2545 | se.want_pointer = 1; | |
2546 | gfc_conv_expr (&se, expr); | |
2547 | gfc_add_block_to_block (&block, &se.pre); | |
2548 | gfc_add_modify_expr (&block, dest, | |
2549 | fold_convert (TREE_TYPE (dest), se.expr)); | |
2550 | gfc_add_block_to_block (&block, &se.post); | |
2551 | } | |
2552 | } | |
2553 | else if (cm->dimension) | |
2554 | { | |
2555 | tmp = gfc_trans_subarray_assign (dest, cm, expr); | |
2556 | gfc_add_expr_to_block (&block, tmp); | |
2557 | } | |
2558 | else if (expr->ts.type == BT_DERIVED) | |
2559 | { | |
39fca56b | 2560 | /* Nested derived type. */ |
9a0aec1d | 2561 | tmp = gfc_trans_structure_assign (dest, expr); |
2562 | gfc_add_expr_to_block (&block, tmp); | |
2563 | } | |
2564 | else | |
2565 | { | |
2566 | /* Scalar component. */ | |
2567 | gfc_se lse; | |
2568 | ||
2569 | gfc_init_se (&se, NULL); | |
2570 | gfc_init_se (&lse, NULL); | |
2571 | ||
2572 | gfc_conv_expr (&se, expr); | |
2573 | if (cm->ts.type == BT_CHARACTER) | |
2574 | lse.string_length = cm->ts.cl->backend_decl; | |
2575 | lse.expr = dest; | |
2576 | tmp = gfc_trans_scalar_assign (&lse, &se, cm->ts.type); | |
2577 | gfc_add_expr_to_block (&block, tmp); | |
2578 | } | |
2579 | return gfc_finish_block (&block); | |
2580 | } | |
2581 | ||
39fca56b | 2582 | /* Assign a derived type constructor to a variable. */ |
9a0aec1d | 2583 | |
2584 | static tree | |
2585 | gfc_trans_structure_assign (tree dest, gfc_expr * expr) | |
2586 | { | |
2587 | gfc_constructor *c; | |
2588 | gfc_component *cm; | |
2589 | stmtblock_t block; | |
2590 | tree field; | |
2591 | tree tmp; | |
2592 | ||
2593 | gfc_start_block (&block); | |
2594 | cm = expr->ts.derived->components; | |
2595 | for (c = expr->value.constructor; c; c = c->next, cm = cm->next) | |
2596 | { | |
2597 | /* Skip absent members in default initializers. */ | |
2598 | if (!c->expr) | |
2599 | continue; | |
2600 | ||
2601 | field = cm->backend_decl; | |
ed52ef8b | 2602 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), dest, field, NULL_TREE); |
9a0aec1d | 2603 | tmp = gfc_trans_subcomponent_assign (tmp, cm, c->expr); |
2604 | gfc_add_expr_to_block (&block, tmp); | |
2605 | } | |
2606 | return gfc_finish_block (&block); | |
2607 | } | |
2608 | ||
4ee9c684 | 2609 | /* Build an expression for a constructor. If init is nonzero then |
2610 | this is part of a static variable initializer. */ | |
2611 | ||
2612 | void | |
2613 | gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init) | |
2614 | { | |
2615 | gfc_constructor *c; | |
2616 | gfc_component *cm; | |
4ee9c684 | 2617 | tree val; |
4ee9c684 | 2618 | tree type; |
9a0aec1d | 2619 | tree tmp; |
c75b4594 | 2620 | VEC(constructor_elt,gc) *v = NULL; |
4ee9c684 | 2621 | |
22d678e8 | 2622 | gcc_assert (se->ss == NULL); |
2623 | gcc_assert (expr->expr_type == EXPR_STRUCTURE); | |
4ee9c684 | 2624 | type = gfc_typenode_for_spec (&expr->ts); |
9a0aec1d | 2625 | |
2626 | if (!init) | |
2627 | { | |
2628 | /* Create a temporary variable and fill it in. */ | |
2629 | se->expr = gfc_create_var (type, expr->ts.derived->name); | |
2630 | tmp = gfc_trans_structure_assign (se->expr, expr); | |
2631 | gfc_add_expr_to_block (&se->pre, tmp); | |
2632 | return; | |
2633 | } | |
2634 | ||
4ee9c684 | 2635 | cm = expr->ts.derived->components; |
2636 | for (c = expr->value.constructor; c; c = c->next, cm = cm->next) | |
2637 | { | |
2638 | /* Skip absent members in default initializers. */ | |
2639 | if (!c->expr) | |
2640 | continue; | |
2641 | ||
9a0aec1d | 2642 | val = gfc_conv_initializer (c->expr, &cm->ts, |
2643 | TREE_TYPE (cm->backend_decl), cm->dimension, cm->pointer); | |
4ee9c684 | 2644 | |
c75b4594 | 2645 | /* Append it to the constructor list. */ |
2646 | CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val); | |
4ee9c684 | 2647 | } |
c75b4594 | 2648 | se->expr = build_constructor (type, v); |
4ee9c684 | 2649 | } |
2650 | ||
2651 | ||
f888a3fb | 2652 | /* Translate a substring expression. */ |
4ee9c684 | 2653 | |
2654 | static void | |
2655 | gfc_conv_substring_expr (gfc_se * se, gfc_expr * expr) | |
2656 | { | |
2657 | gfc_ref *ref; | |
2658 | ||
2659 | ref = expr->ref; | |
2660 | ||
22d678e8 | 2661 | gcc_assert (ref->type == REF_SUBSTRING); |
4ee9c684 | 2662 | |
2663 | se->expr = gfc_build_string_const(expr->value.character.length, | |
2664 | expr->value.character.string); | |
2665 | se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr))); | |
2666 | TYPE_STRING_FLAG (TREE_TYPE (se->expr))=1; | |
2667 | ||
2668 | gfc_conv_substring(se,ref,expr->ts.kind); | |
2669 | } | |
2670 | ||
2671 | ||
7b7afa03 | 2672 | /* Entry point for expression translation. Evaluates a scalar quantity. |
2673 | EXPR is the expression to be translated, and SE is the state structure if | |
2674 | called from within the scalarized. */ | |
4ee9c684 | 2675 | |
2676 | void | |
2677 | gfc_conv_expr (gfc_se * se, gfc_expr * expr) | |
2678 | { | |
2679 | if (se->ss && se->ss->expr == expr | |
2680 | && (se->ss->type == GFC_SS_SCALAR || se->ss->type == GFC_SS_REFERENCE)) | |
2681 | { | |
9a0aec1d | 2682 | /* Substitute a scalar expression evaluated outside the scalarization |
4ee9c684 | 2683 | loop. */ |
2684 | se->expr = se->ss->data.scalar.expr; | |
7949cb07 | 2685 | se->string_length = se->ss->string_length; |
4ee9c684 | 2686 | gfc_advance_se_ss_chain (se); |
2687 | return; | |
2688 | } | |
2689 | ||
2690 | switch (expr->expr_type) | |
2691 | { | |
2692 | case EXPR_OP: | |
2693 | gfc_conv_expr_op (se, expr); | |
2694 | break; | |
2695 | ||
2696 | case EXPR_FUNCTION: | |
2697 | gfc_conv_function_expr (se, expr); | |
2698 | break; | |
2699 | ||
2700 | case EXPR_CONSTANT: | |
2701 | gfc_conv_constant (se, expr); | |
2702 | break; | |
2703 | ||
2704 | case EXPR_VARIABLE: | |
2705 | gfc_conv_variable (se, expr); | |
2706 | break; | |
2707 | ||
2708 | case EXPR_NULL: | |
2709 | se->expr = null_pointer_node; | |
2710 | break; | |
2711 | ||
2712 | case EXPR_SUBSTRING: | |
2713 | gfc_conv_substring_expr (se, expr); | |
2714 | break; | |
2715 | ||
2716 | case EXPR_STRUCTURE: | |
2717 | gfc_conv_structure (se, expr, 0); | |
2718 | break; | |
2719 | ||
2720 | case EXPR_ARRAY: | |
2721 | gfc_conv_array_constructor_expr (se, expr); | |
2722 | break; | |
2723 | ||
2724 | default: | |
22d678e8 | 2725 | gcc_unreachable (); |
4ee9c684 | 2726 | break; |
2727 | } | |
2728 | } | |
2729 | ||
7b7afa03 | 2730 | /* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs |
2731 | of an assignment. */ | |
4ee9c684 | 2732 | void |
2733 | gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr) | |
2734 | { | |
2735 | gfc_conv_expr (se, expr); | |
7b7afa03 | 2736 | /* All numeric lvalues should have empty post chains. If not we need to |
4ee9c684 | 2737 | figure out a way of rewriting an lvalue so that it has no post chain. */ |
7b7afa03 | 2738 | gcc_assert (expr->ts.type == BT_CHARACTER || !se->post.head); |
4ee9c684 | 2739 | } |
2740 | ||
7b7afa03 | 2741 | /* Like gfc_conv_expr, but the POST block is guaranteed to be empty for |
d4163395 | 2742 | numeric expressions. Used for scalar values where inserting cleanup code |
7b7afa03 | 2743 | is inconvenient. */ |
4ee9c684 | 2744 | void |
2745 | gfc_conv_expr_val (gfc_se * se, gfc_expr * expr) | |
2746 | { | |
2747 | tree val; | |
2748 | ||
22d678e8 | 2749 | gcc_assert (expr->ts.type != BT_CHARACTER); |
4ee9c684 | 2750 | gfc_conv_expr (se, expr); |
2751 | if (se->post.head) | |
2752 | { | |
2753 | val = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
2754 | gfc_add_modify_expr (&se->pre, val, se->expr); | |
7b7afa03 | 2755 | se->expr = val; |
2756 | gfc_add_block_to_block (&se->pre, &se->post); | |
4ee9c684 | 2757 | } |
2758 | } | |
2759 | ||
7b7afa03 | 2760 | /* Helper to translate and expression and convert it to a particular type. */ |
4ee9c684 | 2761 | void |
2762 | gfc_conv_expr_type (gfc_se * se, gfc_expr * expr, tree type) | |
2763 | { | |
2764 | gfc_conv_expr_val (se, expr); | |
2765 | se->expr = convert (type, se->expr); | |
2766 | } | |
2767 | ||
2768 | ||
f888a3fb | 2769 | /* Converts an expression so that it can be passed by reference. Scalar |
4ee9c684 | 2770 | values only. */ |
2771 | ||
2772 | void | |
2773 | gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr) | |
2774 | { | |
2775 | tree var; | |
2776 | ||
2777 | if (se->ss && se->ss->expr == expr | |
2778 | && se->ss->type == GFC_SS_REFERENCE) | |
2779 | { | |
2780 | se->expr = se->ss->data.scalar.expr; | |
7949cb07 | 2781 | se->string_length = se->ss->string_length; |
4ee9c684 | 2782 | gfc_advance_se_ss_chain (se); |
2783 | return; | |
2784 | } | |
2785 | ||
2786 | if (expr->ts.type == BT_CHARACTER) | |
2787 | { | |
2788 | gfc_conv_expr (se, expr); | |
2789 | gfc_conv_string_parameter (se); | |
2790 | return; | |
2791 | } | |
2792 | ||
2793 | if (expr->expr_type == EXPR_VARIABLE) | |
2794 | { | |
2795 | se->want_pointer = 1; | |
2796 | gfc_conv_expr (se, expr); | |
2797 | if (se->post.head) | |
2798 | { | |
2799 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
2800 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
2801 | gfc_add_block_to_block (&se->pre, &se->post); | |
2802 | se->expr = var; | |
2803 | } | |
2804 | return; | |
2805 | } | |
2806 | ||
2807 | gfc_conv_expr (se, expr); | |
2808 | ||
2809 | /* Create a temporary var to hold the value. */ | |
e67e5e1f | 2810 | if (TREE_CONSTANT (se->expr)) |
2811 | { | |
2812 | var = build_decl (CONST_DECL, NULL, TREE_TYPE (se->expr)); | |
2813 | DECL_INITIAL (var) = se->expr; | |
2814 | pushdecl (var); | |
2815 | } | |
2816 | else | |
2817 | { | |
2818 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
2819 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
2820 | } | |
4ee9c684 | 2821 | gfc_add_block_to_block (&se->pre, &se->post); |
2822 | ||
2823 | /* Take the address of that value. */ | |
9596685a | 2824 | se->expr = build_fold_addr_expr (var); |
4ee9c684 | 2825 | } |
2826 | ||
2827 | ||
2828 | tree | |
2829 | gfc_trans_pointer_assign (gfc_code * code) | |
2830 | { | |
2831 | return gfc_trans_pointer_assignment (code->expr, code->expr2); | |
2832 | } | |
2833 | ||
2834 | ||
4396343e | 2835 | /* Generate code for a pointer assignment. */ |
2836 | ||
4ee9c684 | 2837 | tree |
2838 | gfc_trans_pointer_assignment (gfc_expr * expr1, gfc_expr * expr2) | |
2839 | { | |
2840 | gfc_se lse; | |
2841 | gfc_se rse; | |
2842 | gfc_ss *lss; | |
2843 | gfc_ss *rss; | |
2844 | stmtblock_t block; | |
7853829d | 2845 | tree desc; |
2846 | tree tmp; | |
4ee9c684 | 2847 | |
2848 | gfc_start_block (&block); | |
2849 | ||
2850 | gfc_init_se (&lse, NULL); | |
2851 | ||
2852 | lss = gfc_walk_expr (expr1); | |
2853 | rss = gfc_walk_expr (expr2); | |
2854 | if (lss == gfc_ss_terminator) | |
2855 | { | |
4396343e | 2856 | /* Scalar pointers. */ |
4ee9c684 | 2857 | lse.want_pointer = 1; |
2858 | gfc_conv_expr (&lse, expr1); | |
22d678e8 | 2859 | gcc_assert (rss == gfc_ss_terminator); |
4ee9c684 | 2860 | gfc_init_se (&rse, NULL); |
2861 | rse.want_pointer = 1; | |
2862 | gfc_conv_expr (&rse, expr2); | |
2863 | gfc_add_block_to_block (&block, &lse.pre); | |
2864 | gfc_add_block_to_block (&block, &rse.pre); | |
260abd71 | 2865 | gfc_add_modify_expr (&block, lse.expr, |
2866 | fold_convert (TREE_TYPE (lse.expr), rse.expr)); | |
4ee9c684 | 2867 | gfc_add_block_to_block (&block, &rse.post); |
2868 | gfc_add_block_to_block (&block, &lse.post); | |
2869 | } | |
2870 | else | |
2871 | { | |
4396343e | 2872 | /* Array pointer. */ |
4ee9c684 | 2873 | gfc_conv_expr_descriptor (&lse, expr1, lss); |
7853829d | 2874 | switch (expr2->expr_type) |
2875 | { | |
2876 | case EXPR_NULL: | |
2877 | /* Just set the data pointer to null. */ | |
2878 | gfc_conv_descriptor_data_set (&block, lse.expr, null_pointer_node); | |
2879 | break; | |
2880 | ||
2881 | case EXPR_VARIABLE: | |
2882 | /* Assign directly to the pointer's descriptor. */ | |
4ee9c684 | 2883 | lse.direct_byref = 1; |
7853829d | 2884 | gfc_conv_expr_descriptor (&lse, expr2, rss); |
2885 | break; | |
2886 | ||
2887 | default: | |
2888 | /* Assign to a temporary descriptor and then copy that | |
2889 | temporary to the pointer. */ | |
2890 | desc = lse.expr; | |
2891 | tmp = gfc_create_var (TREE_TYPE (desc), "ptrtemp"); | |
2892 | ||
2893 | lse.expr = tmp; | |
2894 | lse.direct_byref = 1; | |
2895 | gfc_conv_expr_descriptor (&lse, expr2, rss); | |
2896 | gfc_add_modify_expr (&lse.pre, desc, tmp); | |
2897 | break; | |
4ee9c684 | 2898 | } |
2899 | gfc_add_block_to_block (&block, &lse.pre); | |
2900 | gfc_add_block_to_block (&block, &lse.post); | |
2901 | } | |
2902 | return gfc_finish_block (&block); | |
2903 | } | |
2904 | ||
2905 | ||
2906 | /* Makes sure se is suitable for passing as a function string parameter. */ | |
2907 | /* TODO: Need to check all callers fo this function. It may be abused. */ | |
2908 | ||
2909 | void | |
2910 | gfc_conv_string_parameter (gfc_se * se) | |
2911 | { | |
2912 | tree type; | |
2913 | ||
2914 | if (TREE_CODE (se->expr) == STRING_CST) | |
2915 | { | |
2916 | se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); | |
2917 | return; | |
2918 | } | |
2919 | ||
2920 | type = TREE_TYPE (se->expr); | |
2921 | if (TYPE_STRING_FLAG (type)) | |
2922 | { | |
22d678e8 | 2923 | gcc_assert (TREE_CODE (se->expr) != INDIRECT_REF); |
4ee9c684 | 2924 | se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); |
2925 | } | |
2926 | ||
22d678e8 | 2927 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (se->expr))); |
2928 | gcc_assert (se->string_length | |
4ee9c684 | 2929 | && TREE_CODE (TREE_TYPE (se->string_length)) == INTEGER_TYPE); |
2930 | } | |
2931 | ||
2932 | ||
2933 | /* Generate code for assignment of scalar variables. Includes character | |
2934 | strings. */ | |
2935 | ||
2936 | tree | |
2937 | gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, bt type) | |
2938 | { | |
4ee9c684 | 2939 | stmtblock_t block; |
2940 | ||
2941 | gfc_init_block (&block); | |
2942 | ||
4ee9c684 | 2943 | if (type == BT_CHARACTER) |
2944 | { | |
22d678e8 | 2945 | gcc_assert (lse->string_length != NULL_TREE |
4ee9c684 | 2946 | && rse->string_length != NULL_TREE); |
2947 | ||
2948 | gfc_conv_string_parameter (lse); | |
2949 | gfc_conv_string_parameter (rse); | |
2950 | ||
2951 | gfc_add_block_to_block (&block, &lse->pre); | |
2952 | gfc_add_block_to_block (&block, &rse->pre); | |
2953 | ||
dbe60343 | 2954 | gfc_trans_string_copy (&block, lse->string_length, lse->expr, |
2955 | rse->string_length, rse->expr); | |
4ee9c684 | 2956 | } |
2957 | else | |
2958 | { | |
2959 | gfc_add_block_to_block (&block, &lse->pre); | |
2960 | gfc_add_block_to_block (&block, &rse->pre); | |
2961 | ||
260abd71 | 2962 | gfc_add_modify_expr (&block, lse->expr, |
2963 | fold_convert (TREE_TYPE (lse->expr), rse->expr)); | |
4ee9c684 | 2964 | } |
2965 | ||
2966 | gfc_add_block_to_block (&block, &lse->post); | |
2967 | gfc_add_block_to_block (&block, &rse->post); | |
2968 | ||
2969 | return gfc_finish_block (&block); | |
2970 | } | |
2971 | ||
2972 | ||
2973 | /* Try to translate array(:) = func (...), where func is a transformational | |
2974 | array function, without using a temporary. Returns NULL is this isn't the | |
2975 | case. */ | |
2976 | ||
2977 | static tree | |
2978 | gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2) | |
2979 | { | |
2980 | gfc_se se; | |
2981 | gfc_ss *ss; | |
70464f87 | 2982 | gfc_ref * ref; |
2983 | bool seen_array_ref; | |
4ee9c684 | 2984 | |
2985 | /* The caller has already checked rank>0 and expr_type == EXPR_FUNCTION. */ | |
2986 | if (expr2->value.function.isym && !gfc_is_intrinsic_libcall (expr2)) | |
2987 | return NULL; | |
2988 | ||
2989 | /* Elemental functions don't need a temporary anyway. */ | |
08349c53 | 2990 | if (expr2->value.function.esym != NULL |
2991 | && expr2->value.function.esym->attr.elemental) | |
4ee9c684 | 2992 | return NULL; |
2993 | ||
c99d633f | 2994 | /* Fail if EXPR1 can't be expressed as a descriptor. */ |
2995 | if (gfc_ref_needs_temporary_p (expr1->ref)) | |
2996 | return NULL; | |
2997 | ||
34da51b6 | 2998 | /* Functions returning pointers need temporaries. */ |
d4ef6f9d | 2999 | if (expr2->symtree->n.sym->attr.pointer |
3000 | || expr2->symtree->n.sym->attr.allocatable) | |
34da51b6 | 3001 | return NULL; |
3002 | ||
70464f87 | 3003 | /* Check that no LHS component references appear during an array |
3004 | reference. This is needed because we do not have the means to | |
3005 | span any arbitrary stride with an array descriptor. This check | |
3006 | is not needed for the rhs because the function result has to be | |
3007 | a complete type. */ | |
3008 | seen_array_ref = false; | |
3009 | for (ref = expr1->ref; ref; ref = ref->next) | |
3010 | { | |
3011 | if (ref->type == REF_ARRAY) | |
3012 | seen_array_ref= true; | |
3013 | else if (ref->type == REF_COMPONENT && seen_array_ref) | |
3014 | return NULL; | |
3015 | } | |
3016 | ||
4ee9c684 | 3017 | /* Check for a dependency. */ |
018ef8b8 | 3018 | if (gfc_check_fncall_dependency (expr1, INTENT_OUT, |
3019 | expr2->value.function.esym, | |
3020 | expr2->value.function.actual)) | |
4ee9c684 | 3021 | return NULL; |
3022 | ||
3023 | /* The frontend doesn't seem to bother filling in expr->symtree for intrinsic | |
3024 | functions. */ | |
22d678e8 | 3025 | gcc_assert (expr2->value.function.isym |
e2293887 | 3026 | || (gfc_return_by_reference (expr2->value.function.esym) |
3027 | && expr2->value.function.esym->result->attr.dimension)); | |
4ee9c684 | 3028 | |
3029 | ss = gfc_walk_expr (expr1); | |
22d678e8 | 3030 | gcc_assert (ss != gfc_ss_terminator); |
4ee9c684 | 3031 | gfc_init_se (&se, NULL); |
3032 | gfc_start_block (&se.pre); | |
3033 | se.want_pointer = 1; | |
3034 | ||
3035 | gfc_conv_array_parameter (&se, expr1, ss, 0); | |
3036 | ||
3037 | se.direct_byref = 1; | |
3038 | se.ss = gfc_walk_expr (expr2); | |
22d678e8 | 3039 | gcc_assert (se.ss != gfc_ss_terminator); |
4ee9c684 | 3040 | gfc_conv_function_expr (&se, expr2); |
4ee9c684 | 3041 | gfc_add_block_to_block (&se.pre, &se.post); |
3042 | ||
3043 | return gfc_finish_block (&se.pre); | |
3044 | } | |
3045 | ||
3046 | ||
3047 | /* Translate an assignment. Most of the code is concerned with | |
3048 | setting up the scalarizer. */ | |
3049 | ||
3050 | tree | |
3051 | gfc_trans_assignment (gfc_expr * expr1, gfc_expr * expr2) | |
3052 | { | |
3053 | gfc_se lse; | |
3054 | gfc_se rse; | |
3055 | gfc_ss *lss; | |
3056 | gfc_ss *lss_section; | |
3057 | gfc_ss *rss; | |
3058 | gfc_loopinfo loop; | |
3059 | tree tmp; | |
3060 | stmtblock_t block; | |
3061 | stmtblock_t body; | |
3062 | ||
3063 | /* Special case a single function returning an array. */ | |
3064 | if (expr2->expr_type == EXPR_FUNCTION && expr2->rank > 0) | |
3065 | { | |
3066 | tmp = gfc_trans_arrayfunc_assign (expr1, expr2); | |
3067 | if (tmp) | |
3068 | return tmp; | |
3069 | } | |
3070 | ||
3071 | /* Assignment of the form lhs = rhs. */ | |
3072 | gfc_start_block (&block); | |
3073 | ||
3074 | gfc_init_se (&lse, NULL); | |
3075 | gfc_init_se (&rse, NULL); | |
3076 | ||
3077 | /* Walk the lhs. */ | |
3078 | lss = gfc_walk_expr (expr1); | |
3079 | rss = NULL; | |
3080 | if (lss != gfc_ss_terminator) | |
3081 | { | |
3082 | /* The assignment needs scalarization. */ | |
3083 | lss_section = lss; | |
3084 | ||
3085 | /* Find a non-scalar SS from the lhs. */ | |
3086 | while (lss_section != gfc_ss_terminator | |
3087 | && lss_section->type != GFC_SS_SECTION) | |
3088 | lss_section = lss_section->next; | |
3089 | ||
22d678e8 | 3090 | gcc_assert (lss_section != gfc_ss_terminator); |
4ee9c684 | 3091 | |
3092 | /* Initialize the scalarizer. */ | |
3093 | gfc_init_loopinfo (&loop); | |
3094 | ||
3095 | /* Walk the rhs. */ | |
3096 | rss = gfc_walk_expr (expr2); | |
3097 | if (rss == gfc_ss_terminator) | |
3098 | { | |
3099 | /* The rhs is scalar. Add a ss for the expression. */ | |
3100 | rss = gfc_get_ss (); | |
3101 | rss->next = gfc_ss_terminator; | |
3102 | rss->type = GFC_SS_SCALAR; | |
3103 | rss->expr = expr2; | |
3104 | } | |
3105 | /* Associate the SS with the loop. */ | |
3106 | gfc_add_ss_to_loop (&loop, lss); | |
3107 | gfc_add_ss_to_loop (&loop, rss); | |
3108 | ||
3109 | /* Calculate the bounds of the scalarization. */ | |
3110 | gfc_conv_ss_startstride (&loop); | |
3111 | /* Resolve any data dependencies in the statement. */ | |
376a3611 | 3112 | gfc_conv_resolve_dependencies (&loop, lss, rss); |
4ee9c684 | 3113 | /* Setup the scalarizing loops. */ |
3114 | gfc_conv_loop_setup (&loop); | |
3115 | ||
3116 | /* Setup the gfc_se structures. */ | |
3117 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
3118 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
3119 | ||
3120 | rse.ss = rss; | |
3121 | gfc_mark_ss_chain_used (rss, 1); | |
3122 | if (loop.temp_ss == NULL) | |
3123 | { | |
3124 | lse.ss = lss; | |
3125 | gfc_mark_ss_chain_used (lss, 1); | |
3126 | } | |
3127 | else | |
3128 | { | |
3129 | lse.ss = loop.temp_ss; | |
3130 | gfc_mark_ss_chain_used (lss, 3); | |
3131 | gfc_mark_ss_chain_used (loop.temp_ss, 3); | |
3132 | } | |
3133 | ||
3134 | /* Start the scalarized loop body. */ | |
3135 | gfc_start_scalarized_body (&loop, &body); | |
3136 | } | |
3137 | else | |
3138 | gfc_init_block (&body); | |
3139 | ||
3140 | /* Translate the expression. */ | |
3141 | gfc_conv_expr (&rse, expr2); | |
3142 | ||
3143 | if (lss != gfc_ss_terminator && loop.temp_ss != NULL) | |
3144 | { | |
3145 | gfc_conv_tmp_array_ref (&lse); | |
3146 | gfc_advance_se_ss_chain (&lse); | |
3147 | } | |
3148 | else | |
3149 | gfc_conv_expr (&lse, expr1); | |
544c333b | 3150 | |
4ee9c684 | 3151 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts.type); |
3152 | gfc_add_expr_to_block (&body, tmp); | |
3153 | ||
3154 | if (lss == gfc_ss_terminator) | |
3155 | { | |
3156 | /* Use the scalar assignment as is. */ | |
3157 | gfc_add_block_to_block (&block, &body); | |
3158 | } | |
3159 | else | |
3160 | { | |
22d678e8 | 3161 | gcc_assert (lse.ss == gfc_ss_terminator |
3162 | && rse.ss == gfc_ss_terminator); | |
4ee9c684 | 3163 | |
3164 | if (loop.temp_ss != NULL) | |
3165 | { | |
3166 | gfc_trans_scalarized_loop_boundary (&loop, &body); | |
3167 | ||
3168 | /* We need to copy the temporary to the actual lhs. */ | |
3169 | gfc_init_se (&lse, NULL); | |
3170 | gfc_init_se (&rse, NULL); | |
3171 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
3172 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
3173 | ||
3174 | rse.ss = loop.temp_ss; | |
3175 | lse.ss = lss; | |
3176 | ||
3177 | gfc_conv_tmp_array_ref (&rse); | |
3178 | gfc_advance_se_ss_chain (&rse); | |
3179 | gfc_conv_expr (&lse, expr1); | |
3180 | ||
22d678e8 | 3181 | gcc_assert (lse.ss == gfc_ss_terminator |
3182 | && rse.ss == gfc_ss_terminator); | |
4ee9c684 | 3183 | |
3184 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts.type); | |
3185 | gfc_add_expr_to_block (&body, tmp); | |
3186 | } | |
3187 | /* Generate the copying loops. */ | |
3188 | gfc_trans_scalarizing_loops (&loop, &body); | |
3189 | ||
3190 | /* Wrap the whole thing up. */ | |
3191 | gfc_add_block_to_block (&block, &loop.pre); | |
3192 | gfc_add_block_to_block (&block, &loop.post); | |
3193 | ||
3194 | gfc_cleanup_loop (&loop); | |
3195 | } | |
3196 | ||
3197 | return gfc_finish_block (&block); | |
3198 | } | |
3199 | ||
3200 | tree | |
3201 | gfc_trans_assign (gfc_code * code) | |
3202 | { | |
3203 | return gfc_trans_assignment (code->expr, code->expr2); | |
3204 | } |