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4ee9c684 | 1 | /* Expression translation |
0305ad9b | 2 | Copyright (C) 2002, 2003, 2004, 2005 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" | |
42 | ||
9a0aec1d | 43 | static tree gfc_trans_structure_assign (tree dest, gfc_expr * expr); |
4ee9c684 | 44 | |
45 | /* Copy the scalarization loop variables. */ | |
46 | ||
47 | static void | |
48 | gfc_copy_se_loopvars (gfc_se * dest, gfc_se * src) | |
49 | { | |
50 | dest->ss = src->ss; | |
51 | dest->loop = src->loop; | |
52 | } | |
53 | ||
54 | ||
f888a3fb | 55 | /* Initialize a simple expression holder. |
4ee9c684 | 56 | |
57 | Care must be taken when multiple se are created with the same parent. | |
58 | The child se must be kept in sync. The easiest way is to delay creation | |
59 | of a child se until after after the previous se has been translated. */ | |
60 | ||
61 | void | |
62 | gfc_init_se (gfc_se * se, gfc_se * parent) | |
63 | { | |
64 | memset (se, 0, sizeof (gfc_se)); | |
65 | gfc_init_block (&se->pre); | |
66 | gfc_init_block (&se->post); | |
67 | ||
68 | se->parent = parent; | |
69 | ||
70 | if (parent) | |
71 | gfc_copy_se_loopvars (se, parent); | |
72 | } | |
73 | ||
74 | ||
75 | /* Advances to the next SS in the chain. Use this rather than setting | |
f888a3fb | 76 | se->ss = se->ss->next because all the parents needs to be kept in sync. |
4ee9c684 | 77 | See gfc_init_se. */ |
78 | ||
79 | void | |
80 | gfc_advance_se_ss_chain (gfc_se * se) | |
81 | { | |
82 | gfc_se *p; | |
83 | ||
22d678e8 | 84 | gcc_assert (se != NULL && se->ss != NULL && se->ss != gfc_ss_terminator); |
4ee9c684 | 85 | |
86 | p = se; | |
87 | /* Walk down the parent chain. */ | |
88 | while (p != NULL) | |
89 | { | |
f888a3fb | 90 | /* Simple consistency check. */ |
22d678e8 | 91 | gcc_assert (p->parent == NULL || p->parent->ss == p->ss); |
4ee9c684 | 92 | |
93 | p->ss = p->ss->next; | |
94 | ||
95 | p = p->parent; | |
96 | } | |
97 | } | |
98 | ||
99 | ||
100 | /* Ensures the result of the expression as either a temporary variable | |
101 | or a constant so that it can be used repeatedly. */ | |
102 | ||
103 | void | |
104 | gfc_make_safe_expr (gfc_se * se) | |
105 | { | |
106 | tree var; | |
107 | ||
ce45a448 | 108 | if (CONSTANT_CLASS_P (se->expr)) |
4ee9c684 | 109 | return; |
110 | ||
f888a3fb | 111 | /* We need a temporary for this result. */ |
4ee9c684 | 112 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); |
113 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
114 | se->expr = var; | |
115 | } | |
116 | ||
117 | ||
5cb9d0d8 | 118 | /* Return an expression which determines if a dummy parameter is present. |
119 | Also used for arguments to procedures with multiple entry points. */ | |
4ee9c684 | 120 | |
121 | tree | |
122 | gfc_conv_expr_present (gfc_symbol * sym) | |
123 | { | |
124 | tree decl; | |
125 | ||
5cb9d0d8 | 126 | gcc_assert (sym->attr.dummy); |
4ee9c684 | 127 | |
128 | decl = gfc_get_symbol_decl (sym); | |
129 | if (TREE_CODE (decl) != PARM_DECL) | |
130 | { | |
131 | /* Array parameters use a temporary descriptor, we want the real | |
132 | parameter. */ | |
22d678e8 | 133 | gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (decl)) |
4ee9c684 | 134 | || GFC_ARRAY_TYPE_P (TREE_TYPE (decl))); |
135 | decl = GFC_DECL_SAVED_DESCRIPTOR (decl); | |
136 | } | |
ed52ef8b | 137 | return build2 (NE_EXPR, boolean_type_node, decl, |
138 | fold_convert (TREE_TYPE (decl), null_pointer_node)); | |
4ee9c684 | 139 | } |
140 | ||
141 | ||
6bf678b8 | 142 | /* Get the character length of an expression, looking through gfc_refs |
143 | if necessary. */ | |
144 | ||
145 | tree | |
146 | gfc_get_expr_charlen (gfc_expr *e) | |
147 | { | |
148 | gfc_ref *r; | |
149 | tree length; | |
150 | ||
151 | gcc_assert (e->expr_type == EXPR_VARIABLE | |
152 | && e->ts.type == BT_CHARACTER); | |
153 | ||
154 | length = NULL; /* To silence compiler warning. */ | |
155 | ||
156 | /* First candidate: if the variable is of type CHARACTER, the | |
157 | expression's length could be the length of the character | |
b14e2757 | 158 | variable. */ |
6bf678b8 | 159 | if (e->symtree->n.sym->ts.type == BT_CHARACTER) |
160 | length = e->symtree->n.sym->ts.cl->backend_decl; | |
161 | ||
162 | /* Look through the reference chain for component references. */ | |
163 | for (r = e->ref; r; r = r->next) | |
164 | { | |
165 | switch (r->type) | |
166 | { | |
167 | case REF_COMPONENT: | |
168 | if (r->u.c.component->ts.type == BT_CHARACTER) | |
169 | length = r->u.c.component->ts.cl->backend_decl; | |
170 | break; | |
171 | ||
172 | case REF_ARRAY: | |
173 | /* Do nothing. */ | |
174 | break; | |
175 | ||
176 | default: | |
177 | /* We should never got substring references here. These will be | |
178 | broken down by the scalarizer. */ | |
179 | gcc_unreachable (); | |
180 | } | |
181 | } | |
182 | ||
183 | gcc_assert (length != NULL); | |
184 | return length; | |
185 | } | |
186 | ||
187 | ||
188 | ||
4ee9c684 | 189 | /* Generate code to initialize a string length variable. Returns the |
190 | value. */ | |
191 | ||
192 | void | |
193 | gfc_trans_init_string_length (gfc_charlen * cl, stmtblock_t * pblock) | |
194 | { | |
195 | gfc_se se; | |
196 | tree tmp; | |
197 | ||
198 | gfc_init_se (&se, NULL); | |
9ad09405 | 199 | gfc_conv_expr_type (&se, cl->length, gfc_charlen_type_node); |
4ee9c684 | 200 | gfc_add_block_to_block (pblock, &se.pre); |
201 | ||
202 | tmp = cl->backend_decl; | |
203 | gfc_add_modify_expr (pblock, tmp, se.expr); | |
204 | } | |
205 | ||
f888a3fb | 206 | |
4ee9c684 | 207 | static void |
208 | gfc_conv_substring (gfc_se * se, gfc_ref * ref, int kind) | |
209 | { | |
210 | tree tmp; | |
211 | tree type; | |
212 | tree var; | |
213 | gfc_se start; | |
214 | gfc_se end; | |
215 | ||
216 | type = gfc_get_character_type (kind, ref->u.ss.length); | |
217 | type = build_pointer_type (type); | |
218 | ||
219 | var = NULL_TREE; | |
220 | gfc_init_se (&start, se); | |
9ad09405 | 221 | gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node); |
4ee9c684 | 222 | gfc_add_block_to_block (&se->pre, &start.pre); |
223 | ||
224 | if (integer_onep (start.expr)) | |
260abd71 | 225 | gfc_conv_string_parameter (se); |
4ee9c684 | 226 | else |
227 | { | |
228 | /* Change the start of the string. */ | |
229 | if (TYPE_STRING_FLAG (TREE_TYPE (se->expr))) | |
230 | tmp = se->expr; | |
231 | else | |
232 | tmp = gfc_build_indirect_ref (se->expr); | |
233 | tmp = gfc_build_array_ref (tmp, start.expr); | |
234 | se->expr = gfc_build_addr_expr (type, tmp); | |
235 | } | |
236 | ||
237 | /* Length = end + 1 - start. */ | |
238 | gfc_init_se (&end, se); | |
239 | if (ref->u.ss.end == NULL) | |
240 | end.expr = se->string_length; | |
241 | else | |
242 | { | |
9ad09405 | 243 | gfc_conv_expr_type (&end, ref->u.ss.end, gfc_charlen_type_node); |
4ee9c684 | 244 | gfc_add_block_to_block (&se->pre, &end.pre); |
245 | } | |
246 | tmp = | |
9ad09405 | 247 | build2 (MINUS_EXPR, gfc_charlen_type_node, |
248 | fold_convert (gfc_charlen_type_node, integer_one_node), | |
ed52ef8b | 249 | start.expr); |
9ad09405 | 250 | tmp = build2 (PLUS_EXPR, gfc_charlen_type_node, end.expr, tmp); |
4ee9c684 | 251 | se->string_length = fold (tmp); |
252 | } | |
253 | ||
254 | ||
255 | /* Convert a derived type component reference. */ | |
256 | ||
257 | static void | |
258 | gfc_conv_component_ref (gfc_se * se, gfc_ref * ref) | |
259 | { | |
260 | gfc_component *c; | |
261 | tree tmp; | |
262 | tree decl; | |
263 | tree field; | |
264 | ||
265 | c = ref->u.c.component; | |
266 | ||
22d678e8 | 267 | gcc_assert (c->backend_decl); |
4ee9c684 | 268 | |
269 | field = c->backend_decl; | |
22d678e8 | 270 | gcc_assert (TREE_CODE (field) == FIELD_DECL); |
4ee9c684 | 271 | decl = se->expr; |
ed52ef8b | 272 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE); |
4ee9c684 | 273 | |
274 | se->expr = tmp; | |
275 | ||
276 | if (c->ts.type == BT_CHARACTER) | |
277 | { | |
278 | tmp = c->ts.cl->backend_decl; | |
7949cb07 | 279 | /* Components must always be constant length. */ |
22d678e8 | 280 | gcc_assert (tmp && INTEGER_CST_P (tmp)); |
4ee9c684 | 281 | se->string_length = tmp; |
282 | } | |
283 | ||
dc5fe211 | 284 | if (c->pointer && c->dimension == 0 && c->ts.type != BT_CHARACTER) |
4ee9c684 | 285 | se->expr = gfc_build_indirect_ref (se->expr); |
286 | } | |
287 | ||
288 | ||
289 | /* Return the contents of a variable. Also handles reference/pointer | |
290 | variables (all Fortran pointer references are implicit). */ | |
291 | ||
292 | static void | |
293 | gfc_conv_variable (gfc_se * se, gfc_expr * expr) | |
294 | { | |
295 | gfc_ref *ref; | |
296 | gfc_symbol *sym; | |
297 | ||
298 | sym = expr->symtree->n.sym; | |
299 | if (se->ss != NULL) | |
300 | { | |
301 | /* Check that something hasn't gone horribly wrong. */ | |
22d678e8 | 302 | gcc_assert (se->ss != gfc_ss_terminator); |
303 | gcc_assert (se->ss->expr == expr); | |
4ee9c684 | 304 | |
305 | /* A scalarized term. We already know the descriptor. */ | |
306 | se->expr = se->ss->data.info.descriptor; | |
7949cb07 | 307 | se->string_length = se->ss->string_length; |
4ee9c684 | 308 | ref = se->ss->data.info.ref; |
309 | } | |
310 | else | |
311 | { | |
c6871095 | 312 | tree se_expr = NULL_TREE; |
313 | ||
4ee9c684 | 314 | se->expr = gfc_get_symbol_decl (sym); |
315 | ||
c6871095 | 316 | /* Special case for assigning the return value of a function. |
317 | Self recursive functions must have an explicit return value. */ | |
318 | if (se->expr == current_function_decl && sym->attr.function | |
319 | && (sym->result == sym)) | |
320 | se_expr = gfc_get_fake_result_decl (sym); | |
321 | ||
322 | /* Similarly for alternate entry points. */ | |
323 | else if (sym->attr.function && sym->attr.entry | |
324 | && (sym->result == sym) | |
325 | && sym->ns->proc_name->backend_decl == current_function_decl) | |
326 | { | |
327 | gfc_entry_list *el = NULL; | |
328 | ||
329 | for (el = sym->ns->entries; el; el = el->next) | |
330 | if (sym == el->sym) | |
331 | { | |
332 | se_expr = gfc_get_fake_result_decl (sym); | |
333 | break; | |
334 | } | |
335 | } | |
336 | ||
337 | else if (sym->attr.result | |
338 | && sym->ns->proc_name->backend_decl == current_function_decl | |
339 | && sym->ns->proc_name->attr.entry_master | |
340 | && !gfc_return_by_reference (sym->ns->proc_name)) | |
341 | se_expr = gfc_get_fake_result_decl (sym); | |
342 | ||
343 | if (se_expr) | |
344 | se->expr = se_expr; | |
345 | ||
4ee9c684 | 346 | /* Procedure actual arguments. */ |
c6871095 | 347 | else if (sym->attr.flavor == FL_PROCEDURE |
348 | && se->expr != current_function_decl) | |
4ee9c684 | 349 | { |
22d678e8 | 350 | gcc_assert (se->want_pointer); |
4ee9c684 | 351 | if (!sym->attr.dummy) |
352 | { | |
22d678e8 | 353 | gcc_assert (TREE_CODE (se->expr) == FUNCTION_DECL); |
4ee9c684 | 354 | se->expr = gfc_build_addr_expr (NULL, se->expr); |
355 | } | |
356 | return; | |
544c333b | 357 | } |
358 | ||
359 | ||
360 | /* Dereference the expression, where needed. Since characters | |
361 | are entirely different from other types, they are treated | |
362 | separately. */ | |
363 | if (sym->ts.type == BT_CHARACTER) | |
364 | { | |
365 | /* Dereference character pointer dummy arguments | |
bf7e666b | 366 | or results. */ |
544c333b | 367 | if ((sym->attr.pointer || sym->attr.allocatable) |
4442ee19 | 368 | && (sym->attr.dummy |
369 | || sym->attr.function | |
370 | || sym->attr.result)) | |
544c333b | 371 | se->expr = gfc_build_indirect_ref (se->expr); |
372 | } | |
373 | else | |
374 | { | |
747a9f62 | 375 | /* Dereference non-character scalar dummy arguments. */ |
4442ee19 | 376 | if (sym->attr.dummy && !sym->attr.dimension) |
544c333b | 377 | se->expr = gfc_build_indirect_ref (se->expr); |
378 | ||
bf7e666b | 379 | /* Dereference scalar hidden result. */ |
4442ee19 | 380 | if (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX |
544c333b | 381 | && (sym->attr.function || sym->attr.result) |
ea346118 | 382 | && !sym->attr.dimension && !sym->attr.pointer) |
544c333b | 383 | se->expr = gfc_build_indirect_ref (se->expr); |
384 | ||
385 | /* Dereference non-character pointer variables. | |
747a9f62 | 386 | These must be dummies, results, or scalars. */ |
544c333b | 387 | if ((sym->attr.pointer || sym->attr.allocatable) |
4442ee19 | 388 | && (sym->attr.dummy |
389 | || sym->attr.function | |
390 | || sym->attr.result | |
391 | || !sym->attr.dimension)) | |
544c333b | 392 | se->expr = gfc_build_indirect_ref (se->expr); |
393 | } | |
394 | ||
4ee9c684 | 395 | ref = expr->ref; |
396 | } | |
397 | ||
398 | /* For character variables, also get the length. */ | |
399 | if (sym->ts.type == BT_CHARACTER) | |
400 | { | |
401 | se->string_length = sym->ts.cl->backend_decl; | |
22d678e8 | 402 | gcc_assert (se->string_length); |
4ee9c684 | 403 | } |
404 | ||
405 | while (ref) | |
406 | { | |
407 | switch (ref->type) | |
408 | { | |
409 | case REF_ARRAY: | |
410 | /* Return the descriptor if that's what we want and this is an array | |
411 | section reference. */ | |
412 | if (se->descriptor_only && ref->u.ar.type != AR_ELEMENT) | |
413 | return; | |
414 | /* TODO: Pointers to single elements of array sections, eg elemental subs. */ | |
415 | /* Return the descriptor for array pointers and allocations. */ | |
416 | if (se->want_pointer | |
417 | && ref->next == NULL && (se->descriptor_only)) | |
418 | return; | |
419 | ||
420 | gfc_conv_array_ref (se, &ref->u.ar); | |
421 | /* Return a pointer to an element. */ | |
422 | break; | |
423 | ||
424 | case REF_COMPONENT: | |
425 | gfc_conv_component_ref (se, ref); | |
426 | break; | |
427 | ||
428 | case REF_SUBSTRING: | |
429 | gfc_conv_substring (se, ref, expr->ts.kind); | |
430 | break; | |
431 | ||
432 | default: | |
22d678e8 | 433 | gcc_unreachable (); |
4ee9c684 | 434 | break; |
435 | } | |
436 | ref = ref->next; | |
437 | } | |
438 | /* Pointer assignment, allocation or pass by reference. Arrays are handled | |
f888a3fb | 439 | separately. */ |
4ee9c684 | 440 | if (se->want_pointer) |
441 | { | |
442 | if (expr->ts.type == BT_CHARACTER) | |
443 | gfc_conv_string_parameter (se); | |
444 | else | |
445 | se->expr = gfc_build_addr_expr (NULL, se->expr); | |
446 | } | |
447 | if (se->ss != NULL) | |
448 | gfc_advance_se_ss_chain (se); | |
449 | } | |
450 | ||
451 | ||
452 | /* Unary ops are easy... Or they would be if ! was a valid op. */ | |
453 | ||
454 | static void | |
455 | gfc_conv_unary_op (enum tree_code code, gfc_se * se, gfc_expr * expr) | |
456 | { | |
457 | gfc_se operand; | |
458 | tree type; | |
459 | ||
22d678e8 | 460 | gcc_assert (expr->ts.type != BT_CHARACTER); |
4ee9c684 | 461 | /* Initialize the operand. */ |
462 | gfc_init_se (&operand, se); | |
9b773341 | 463 | gfc_conv_expr_val (&operand, expr->value.op.op1); |
4ee9c684 | 464 | gfc_add_block_to_block (&se->pre, &operand.pre); |
465 | ||
466 | type = gfc_typenode_for_spec (&expr->ts); | |
467 | ||
468 | /* TRUTH_NOT_EXPR is not a "true" unary operator in GCC. | |
469 | We must convert it to a compare to 0 (e.g. EQ_EXPR (op1, 0)). | |
f888a3fb | 470 | All other unary operators have an equivalent GIMPLE unary operator. */ |
4ee9c684 | 471 | if (code == TRUTH_NOT_EXPR) |
ed52ef8b | 472 | se->expr = build2 (EQ_EXPR, type, operand.expr, |
473 | convert (type, integer_zero_node)); | |
4ee9c684 | 474 | else |
475 | se->expr = build1 (code, type, operand.expr); | |
476 | ||
477 | } | |
478 | ||
76834664 | 479 | /* Expand power operator to optimal multiplications when a value is raised |
f888a3fb | 480 | to a constant integer n. See section 4.6.3, "Evaluation of Powers" of |
76834664 | 481 | Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer |
482 | Programming", 3rd Edition, 1998. */ | |
483 | ||
484 | /* This code is mostly duplicated from expand_powi in the backend. | |
485 | We establish the "optimal power tree" lookup table with the defined size. | |
486 | The items in the table are the exponents used to calculate the index | |
487 | exponents. Any integer n less than the value can get an "addition chain", | |
488 | with the first node being one. */ | |
489 | #define POWI_TABLE_SIZE 256 | |
490 | ||
f888a3fb | 491 | /* The table is from builtins.c. */ |
76834664 | 492 | static const unsigned char powi_table[POWI_TABLE_SIZE] = |
493 | { | |
494 | 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */ | |
495 | 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */ | |
496 | 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */ | |
497 | 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */ | |
498 | 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */ | |
499 | 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */ | |
500 | 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */ | |
501 | 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */ | |
502 | 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */ | |
503 | 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */ | |
504 | 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */ | |
505 | 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */ | |
506 | 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */ | |
507 | 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */ | |
508 | 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */ | |
509 | 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */ | |
510 | 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */ | |
511 | 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */ | |
512 | 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */ | |
513 | 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */ | |
514 | 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */ | |
515 | 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */ | |
516 | 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */ | |
517 | 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */ | |
518 | 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */ | |
519 | 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */ | |
520 | 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */ | |
521 | 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */ | |
522 | 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */ | |
523 | 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */ | |
524 | 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */ | |
525 | 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */ | |
526 | }; | |
527 | ||
f888a3fb | 528 | /* If n is larger than lookup table's max index, we use the "window |
529 | method". */ | |
76834664 | 530 | #define POWI_WINDOW_SIZE 3 |
531 | ||
f888a3fb | 532 | /* Recursive function to expand the power operator. The temporary |
533 | values are put in tmpvar. The function returns tmpvar[1] ** n. */ | |
76834664 | 534 | static tree |
535 | gfc_conv_powi (gfc_se * se, int n, tree * tmpvar) | |
4ee9c684 | 536 | { |
76834664 | 537 | tree op0; |
538 | tree op1; | |
4ee9c684 | 539 | tree tmp; |
76834664 | 540 | int digit; |
4ee9c684 | 541 | |
76834664 | 542 | if (n < POWI_TABLE_SIZE) |
4ee9c684 | 543 | { |
76834664 | 544 | if (tmpvar[n]) |
545 | return tmpvar[n]; | |
4ee9c684 | 546 | |
76834664 | 547 | op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar); |
548 | op1 = gfc_conv_powi (se, powi_table[n], tmpvar); | |
549 | } | |
550 | else if (n & 1) | |
551 | { | |
552 | digit = n & ((1 << POWI_WINDOW_SIZE) - 1); | |
553 | op0 = gfc_conv_powi (se, n - digit, tmpvar); | |
554 | op1 = gfc_conv_powi (se, digit, tmpvar); | |
4ee9c684 | 555 | } |
556 | else | |
557 | { | |
76834664 | 558 | op0 = gfc_conv_powi (se, n >> 1, tmpvar); |
559 | op1 = op0; | |
4ee9c684 | 560 | } |
561 | ||
318c9b27 | 562 | tmp = fold_build2 (MULT_EXPR, TREE_TYPE (op0), op0, op1); |
76834664 | 563 | tmp = gfc_evaluate_now (tmp, &se->pre); |
4ee9c684 | 564 | |
76834664 | 565 | if (n < POWI_TABLE_SIZE) |
566 | tmpvar[n] = tmp; | |
4ee9c684 | 567 | |
76834664 | 568 | return tmp; |
569 | } | |
4ee9c684 | 570 | |
f888a3fb | 571 | |
572 | /* Expand lhs ** rhs. rhs is a constant integer. If it expands successfully, | |
573 | return 1. Else return 0 and a call to runtime library functions | |
574 | will have to be built. */ | |
76834664 | 575 | static int |
576 | gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs) | |
577 | { | |
578 | tree cond; | |
579 | tree tmp; | |
580 | tree type; | |
581 | tree vartmp[POWI_TABLE_SIZE]; | |
582 | int n; | |
583 | int sgn; | |
4ee9c684 | 584 | |
76834664 | 585 | type = TREE_TYPE (lhs); |
586 | n = abs (TREE_INT_CST_LOW (rhs)); | |
587 | sgn = tree_int_cst_sgn (rhs); | |
4ee9c684 | 588 | |
31ad0f07 | 589 | if (((FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations) || optimize_size) |
590 | && (n > 2 || n < -1)) | |
76834664 | 591 | return 0; |
4ee9c684 | 592 | |
76834664 | 593 | /* rhs == 0 */ |
594 | if (sgn == 0) | |
595 | { | |
596 | se->expr = gfc_build_const (type, integer_one_node); | |
597 | return 1; | |
598 | } | |
599 | /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */ | |
600 | if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE)) | |
601 | { | |
ed52ef8b | 602 | tmp = build2 (EQ_EXPR, boolean_type_node, lhs, |
603 | fold_convert (TREE_TYPE (lhs), integer_minus_one_node)); | |
604 | cond = build2 (EQ_EXPR, boolean_type_node, lhs, | |
605 | convert (TREE_TYPE (lhs), integer_one_node)); | |
76834664 | 606 | |
f888a3fb | 607 | /* If rhs is even, |
260abd71 | 608 | result = (lhs == 1 || lhs == -1) ? 1 : 0. */ |
76834664 | 609 | if ((n & 1) == 0) |
610 | { | |
ed52ef8b | 611 | tmp = build2 (TRUTH_OR_EXPR, boolean_type_node, tmp, cond); |
612 | se->expr = build3 (COND_EXPR, type, tmp, | |
613 | convert (type, integer_one_node), | |
614 | convert (type, integer_zero_node)); | |
76834664 | 615 | return 1; |
616 | } | |
f888a3fb | 617 | /* If rhs is odd, |
76834664 | 618 | result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */ |
ed52ef8b | 619 | tmp = build3 (COND_EXPR, type, tmp, |
620 | convert (type, integer_minus_one_node), | |
621 | convert (type, integer_zero_node)); | |
622 | se->expr = build3 (COND_EXPR, type, cond, | |
623 | convert (type, integer_one_node), | |
624 | tmp); | |
76834664 | 625 | return 1; |
626 | } | |
4ee9c684 | 627 | |
76834664 | 628 | memset (vartmp, 0, sizeof (vartmp)); |
629 | vartmp[1] = lhs; | |
76834664 | 630 | if (sgn == -1) |
631 | { | |
632 | tmp = gfc_build_const (type, integer_one_node); | |
ed52ef8b | 633 | vartmp[1] = build2 (RDIV_EXPR, type, tmp, vartmp[1]); |
76834664 | 634 | } |
f5efe504 | 635 | |
636 | se->expr = gfc_conv_powi (se, n, vartmp); | |
637 | ||
76834664 | 638 | return 1; |
4ee9c684 | 639 | } |
640 | ||
641 | ||
76834664 | 642 | /* Power op (**). Constant integer exponent has special handling. */ |
4ee9c684 | 643 | |
644 | static void | |
645 | gfc_conv_power_op (gfc_se * se, gfc_expr * expr) | |
646 | { | |
90ba9145 | 647 | tree gfc_int4_type_node; |
4ee9c684 | 648 | int kind; |
76834664 | 649 | int ikind; |
4ee9c684 | 650 | gfc_se lse; |
651 | gfc_se rse; | |
652 | tree fndecl; | |
653 | tree tmp; | |
4ee9c684 | 654 | |
655 | gfc_init_se (&lse, se); | |
9b773341 | 656 | gfc_conv_expr_val (&lse, expr->value.op.op1); |
7f0345dc | 657 | lse.expr = gfc_evaluate_now (lse.expr, &lse.pre); |
4ee9c684 | 658 | gfc_add_block_to_block (&se->pre, &lse.pre); |
659 | ||
660 | gfc_init_se (&rse, se); | |
9b773341 | 661 | gfc_conv_expr_val (&rse, expr->value.op.op2); |
4ee9c684 | 662 | gfc_add_block_to_block (&se->pre, &rse.pre); |
663 | ||
9b773341 | 664 | if (expr->value.op.op2->ts.type == BT_INTEGER |
665 | && expr->value.op.op2->expr_type == EXPR_CONSTANT) | |
76834664 | 666 | if (gfc_conv_cst_int_power (se, lse.expr, rse.expr)) |
667 | return; | |
4ee9c684 | 668 | |
90ba9145 | 669 | gfc_int4_type_node = gfc_get_int_type (4); |
670 | ||
9b773341 | 671 | kind = expr->value.op.op1->ts.kind; |
672 | switch (expr->value.op.op2->ts.type) | |
4ee9c684 | 673 | { |
674 | case BT_INTEGER: | |
9b773341 | 675 | ikind = expr->value.op.op2->ts.kind; |
76834664 | 676 | switch (ikind) |
677 | { | |
678 | case 1: | |
679 | case 2: | |
680 | rse.expr = convert (gfc_int4_type_node, rse.expr); | |
681 | /* Fall through. */ | |
682 | ||
683 | case 4: | |
684 | ikind = 0; | |
685 | break; | |
686 | ||
687 | case 8: | |
688 | ikind = 1; | |
689 | break; | |
690 | ||
691 | default: | |
22d678e8 | 692 | gcc_unreachable (); |
76834664 | 693 | } |
694 | switch (kind) | |
695 | { | |
696 | case 1: | |
697 | case 2: | |
9b773341 | 698 | if (expr->value.op.op1->ts.type == BT_INTEGER) |
76834664 | 699 | lse.expr = convert (gfc_int4_type_node, lse.expr); |
700 | else | |
22d678e8 | 701 | gcc_unreachable (); |
76834664 | 702 | /* Fall through. */ |
703 | ||
704 | case 4: | |
705 | kind = 0; | |
706 | break; | |
707 | ||
708 | case 8: | |
709 | kind = 1; | |
710 | break; | |
711 | ||
712 | default: | |
22d678e8 | 713 | gcc_unreachable (); |
76834664 | 714 | } |
715 | ||
9b773341 | 716 | switch (expr->value.op.op1->ts.type) |
76834664 | 717 | { |
718 | case BT_INTEGER: | |
719 | fndecl = gfor_fndecl_math_powi[kind][ikind].integer; | |
720 | break; | |
721 | ||
722 | case BT_REAL: | |
723 | fndecl = gfor_fndecl_math_powi[kind][ikind].real; | |
724 | break; | |
725 | ||
726 | case BT_COMPLEX: | |
727 | fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx; | |
728 | break; | |
729 | ||
730 | default: | |
22d678e8 | 731 | gcc_unreachable (); |
76834664 | 732 | } |
733 | break; | |
4ee9c684 | 734 | |
735 | case BT_REAL: | |
736 | switch (kind) | |
737 | { | |
738 | case 4: | |
76834664 | 739 | fndecl = built_in_decls[BUILT_IN_POWF]; |
4ee9c684 | 740 | break; |
741 | case 8: | |
76834664 | 742 | fndecl = built_in_decls[BUILT_IN_POW]; |
4ee9c684 | 743 | break; |
744 | default: | |
22d678e8 | 745 | gcc_unreachable (); |
4ee9c684 | 746 | } |
747 | break; | |
748 | ||
749 | case BT_COMPLEX: | |
750 | switch (kind) | |
751 | { | |
752 | case 4: | |
753 | fndecl = gfor_fndecl_math_cpowf; | |
754 | break; | |
755 | case 8: | |
756 | fndecl = gfor_fndecl_math_cpow; | |
757 | break; | |
758 | default: | |
22d678e8 | 759 | gcc_unreachable (); |
4ee9c684 | 760 | } |
761 | break; | |
762 | ||
763 | default: | |
22d678e8 | 764 | gcc_unreachable (); |
4ee9c684 | 765 | break; |
766 | } | |
767 | ||
768 | tmp = gfc_chainon_list (NULL_TREE, lse.expr); | |
769 | tmp = gfc_chainon_list (tmp, rse.expr); | |
76834664 | 770 | se->expr = fold (gfc_build_function_call (fndecl, tmp)); |
4ee9c684 | 771 | } |
772 | ||
773 | ||
774 | /* Generate code to allocate a string temporary. */ | |
775 | ||
776 | tree | |
777 | gfc_conv_string_tmp (gfc_se * se, tree type, tree len) | |
778 | { | |
779 | tree var; | |
780 | tree tmp; | |
781 | tree args; | |
782 | ||
22d678e8 | 783 | gcc_assert (TREE_TYPE (len) == gfc_charlen_type_node); |
260abd71 | 784 | |
4ee9c684 | 785 | if (gfc_can_put_var_on_stack (len)) |
786 | { | |
787 | /* Create a temporary variable to hold the result. */ | |
318c9b27 | 788 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, |
789 | convert (gfc_charlen_type_node, integer_one_node)); | |
260abd71 | 790 | tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp); |
4ee9c684 | 791 | tmp = build_array_type (gfc_character1_type_node, tmp); |
792 | var = gfc_create_var (tmp, "str"); | |
793 | var = gfc_build_addr_expr (type, var); | |
794 | } | |
795 | else | |
796 | { | |
797 | /* Allocate a temporary to hold the result. */ | |
798 | var = gfc_create_var (type, "pstr"); | |
799 | args = gfc_chainon_list (NULL_TREE, len); | |
800 | tmp = gfc_build_function_call (gfor_fndecl_internal_malloc, args); | |
801 | tmp = convert (type, tmp); | |
802 | gfc_add_modify_expr (&se->pre, var, tmp); | |
803 | ||
804 | /* Free the temporary afterwards. */ | |
805 | tmp = convert (pvoid_type_node, var); | |
806 | args = gfc_chainon_list (NULL_TREE, tmp); | |
807 | tmp = gfc_build_function_call (gfor_fndecl_internal_free, args); | |
808 | gfc_add_expr_to_block (&se->post, tmp); | |
809 | } | |
810 | ||
811 | return var; | |
812 | } | |
813 | ||
814 | ||
815 | /* Handle a string concatenation operation. A temporary will be allocated to | |
816 | hold the result. */ | |
817 | ||
818 | static void | |
819 | gfc_conv_concat_op (gfc_se * se, gfc_expr * expr) | |
820 | { | |
821 | gfc_se lse; | |
822 | gfc_se rse; | |
823 | tree len; | |
824 | tree type; | |
825 | tree var; | |
826 | tree args; | |
827 | tree tmp; | |
828 | ||
9b773341 | 829 | gcc_assert (expr->value.op.op1->ts.type == BT_CHARACTER |
830 | && expr->value.op.op2->ts.type == BT_CHARACTER); | |
4ee9c684 | 831 | |
832 | gfc_init_se (&lse, se); | |
9b773341 | 833 | gfc_conv_expr (&lse, expr->value.op.op1); |
4ee9c684 | 834 | gfc_conv_string_parameter (&lse); |
835 | gfc_init_se (&rse, se); | |
9b773341 | 836 | gfc_conv_expr (&rse, expr->value.op.op2); |
4ee9c684 | 837 | gfc_conv_string_parameter (&rse); |
838 | ||
839 | gfc_add_block_to_block (&se->pre, &lse.pre); | |
840 | gfc_add_block_to_block (&se->pre, &rse.pre); | |
841 | ||
842 | type = gfc_get_character_type (expr->ts.kind, expr->ts.cl); | |
843 | len = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); | |
844 | if (len == NULL_TREE) | |
845 | { | |
318c9b27 | 846 | len = fold_build2 (PLUS_EXPR, TREE_TYPE (lse.string_length), |
847 | lse.string_length, rse.string_length); | |
4ee9c684 | 848 | } |
849 | ||
850 | type = build_pointer_type (type); | |
851 | ||
852 | var = gfc_conv_string_tmp (se, type, len); | |
853 | ||
854 | /* Do the actual concatenation. */ | |
855 | args = NULL_TREE; | |
856 | args = gfc_chainon_list (args, len); | |
857 | args = gfc_chainon_list (args, var); | |
858 | args = gfc_chainon_list (args, lse.string_length); | |
859 | args = gfc_chainon_list (args, lse.expr); | |
860 | args = gfc_chainon_list (args, rse.string_length); | |
861 | args = gfc_chainon_list (args, rse.expr); | |
862 | tmp = gfc_build_function_call (gfor_fndecl_concat_string, args); | |
863 | gfc_add_expr_to_block (&se->pre, tmp); | |
864 | ||
865 | /* Add the cleanup for the operands. */ | |
866 | gfc_add_block_to_block (&se->pre, &rse.post); | |
867 | gfc_add_block_to_block (&se->pre, &lse.post); | |
868 | ||
869 | se->expr = var; | |
870 | se->string_length = len; | |
871 | } | |
872 | ||
873 | ||
874 | /* Translates an op expression. Common (binary) cases are handled by this | |
875 | function, others are passed on. Recursion is used in either case. | |
876 | We use the fact that (op1.ts == op2.ts) (except for the power | |
f888a3fb | 877 | operator **). |
4ee9c684 | 878 | Operators need no special handling for scalarized expressions as long as |
f888a3fb | 879 | they call gfc_conv_simple_val to get their operands. |
4ee9c684 | 880 | Character strings get special handling. */ |
881 | ||
882 | static void | |
883 | gfc_conv_expr_op (gfc_se * se, gfc_expr * expr) | |
884 | { | |
885 | enum tree_code code; | |
886 | gfc_se lse; | |
887 | gfc_se rse; | |
888 | tree type; | |
889 | tree tmp; | |
890 | int lop; | |
891 | int checkstring; | |
892 | ||
893 | checkstring = 0; | |
894 | lop = 0; | |
9b773341 | 895 | switch (expr->value.op.operator) |
4ee9c684 | 896 | { |
897 | case INTRINSIC_UPLUS: | |
9b773341 | 898 | gfc_conv_expr (se, expr->value.op.op1); |
4ee9c684 | 899 | return; |
900 | ||
901 | case INTRINSIC_UMINUS: | |
902 | gfc_conv_unary_op (NEGATE_EXPR, se, expr); | |
903 | return; | |
904 | ||
905 | case INTRINSIC_NOT: | |
906 | gfc_conv_unary_op (TRUTH_NOT_EXPR, se, expr); | |
907 | return; | |
908 | ||
909 | case INTRINSIC_PLUS: | |
910 | code = PLUS_EXPR; | |
911 | break; | |
912 | ||
913 | case INTRINSIC_MINUS: | |
914 | code = MINUS_EXPR; | |
915 | break; | |
916 | ||
917 | case INTRINSIC_TIMES: | |
918 | code = MULT_EXPR; | |
919 | break; | |
920 | ||
921 | case INTRINSIC_DIVIDE: | |
922 | /* If expr is a real or complex expr, use an RDIV_EXPR. If op1 is | |
923 | an integer, we must round towards zero, so we use a | |
924 | TRUNC_DIV_EXPR. */ | |
925 | if (expr->ts.type == BT_INTEGER) | |
926 | code = TRUNC_DIV_EXPR; | |
927 | else | |
928 | code = RDIV_EXPR; | |
929 | break; | |
930 | ||
931 | case INTRINSIC_POWER: | |
932 | gfc_conv_power_op (se, expr); | |
933 | return; | |
934 | ||
935 | case INTRINSIC_CONCAT: | |
936 | gfc_conv_concat_op (se, expr); | |
937 | return; | |
938 | ||
939 | case INTRINSIC_AND: | |
940 | code = TRUTH_ANDIF_EXPR; | |
941 | lop = 1; | |
942 | break; | |
943 | ||
944 | case INTRINSIC_OR: | |
945 | code = TRUTH_ORIF_EXPR; | |
946 | lop = 1; | |
947 | break; | |
948 | ||
949 | /* EQV and NEQV only work on logicals, but since we represent them | |
88bce636 | 950 | as integers, we can use EQ_EXPR and NE_EXPR for them in GIMPLE. */ |
4ee9c684 | 951 | case INTRINSIC_EQ: |
952 | case INTRINSIC_EQV: | |
953 | code = EQ_EXPR; | |
954 | checkstring = 1; | |
955 | lop = 1; | |
956 | break; | |
957 | ||
958 | case INTRINSIC_NE: | |
959 | case INTRINSIC_NEQV: | |
960 | code = NE_EXPR; | |
961 | checkstring = 1; | |
962 | lop = 1; | |
963 | break; | |
964 | ||
965 | case INTRINSIC_GT: | |
966 | code = GT_EXPR; | |
967 | checkstring = 1; | |
968 | lop = 1; | |
969 | break; | |
970 | ||
971 | case INTRINSIC_GE: | |
972 | code = GE_EXPR; | |
973 | checkstring = 1; | |
974 | lop = 1; | |
975 | break; | |
976 | ||
977 | case INTRINSIC_LT: | |
978 | code = LT_EXPR; | |
979 | checkstring = 1; | |
980 | lop = 1; | |
981 | break; | |
982 | ||
983 | case INTRINSIC_LE: | |
984 | code = LE_EXPR; | |
985 | checkstring = 1; | |
986 | lop = 1; | |
987 | break; | |
988 | ||
989 | case INTRINSIC_USER: | |
990 | case INTRINSIC_ASSIGN: | |
991 | /* These should be converted into function calls by the frontend. */ | |
22d678e8 | 992 | gcc_unreachable (); |
4ee9c684 | 993 | |
994 | default: | |
995 | fatal_error ("Unknown intrinsic op"); | |
996 | return; | |
997 | } | |
998 | ||
f888a3fb | 999 | /* The only exception to this is **, which is handled separately anyway. */ |
9b773341 | 1000 | gcc_assert (expr->value.op.op1->ts.type == expr->value.op.op2->ts.type); |
4ee9c684 | 1001 | |
9b773341 | 1002 | if (checkstring && expr->value.op.op1->ts.type != BT_CHARACTER) |
4ee9c684 | 1003 | checkstring = 0; |
1004 | ||
1005 | /* lhs */ | |
1006 | gfc_init_se (&lse, se); | |
9b773341 | 1007 | gfc_conv_expr (&lse, expr->value.op.op1); |
4ee9c684 | 1008 | gfc_add_block_to_block (&se->pre, &lse.pre); |
1009 | ||
1010 | /* rhs */ | |
1011 | gfc_init_se (&rse, se); | |
9b773341 | 1012 | gfc_conv_expr (&rse, expr->value.op.op2); |
4ee9c684 | 1013 | gfc_add_block_to_block (&se->pre, &rse.pre); |
1014 | ||
1015 | /* For string comparisons we generate a library call, and compare the return | |
1016 | value with 0. */ | |
1017 | if (checkstring) | |
1018 | { | |
1019 | gfc_conv_string_parameter (&lse); | |
1020 | gfc_conv_string_parameter (&rse); | |
1021 | tmp = NULL_TREE; | |
1022 | tmp = gfc_chainon_list (tmp, lse.string_length); | |
1023 | tmp = gfc_chainon_list (tmp, lse.expr); | |
1024 | tmp = gfc_chainon_list (tmp, rse.string_length); | |
1025 | tmp = gfc_chainon_list (tmp, rse.expr); | |
1026 | ||
1027 | /* Build a call for the comparison. */ | |
1028 | lse.expr = gfc_build_function_call (gfor_fndecl_compare_string, tmp); | |
1029 | gfc_add_block_to_block (&lse.post, &rse.post); | |
1030 | ||
1031 | rse.expr = integer_zero_node; | |
1032 | } | |
1033 | ||
1034 | type = gfc_typenode_for_spec (&expr->ts); | |
1035 | ||
1036 | if (lop) | |
1037 | { | |
1038 | /* The result of logical ops is always boolean_type_node. */ | |
318c9b27 | 1039 | tmp = fold_build2 (code, type, lse.expr, rse.expr); |
4ee9c684 | 1040 | se->expr = convert (type, tmp); |
1041 | } | |
1042 | else | |
318c9b27 | 1043 | se->expr = fold_build2 (code, type, lse.expr, rse.expr); |
4ee9c684 | 1044 | |
4ee9c684 | 1045 | /* Add the post blocks. */ |
1046 | gfc_add_block_to_block (&se->post, &rse.post); | |
1047 | gfc_add_block_to_block (&se->post, &lse.post); | |
1048 | } | |
1049 | ||
f888a3fb | 1050 | |
4ee9c684 | 1051 | static void |
1052 | gfc_conv_function_val (gfc_se * se, gfc_symbol * sym) | |
1053 | { | |
1054 | tree tmp; | |
1055 | ||
1056 | if (sym->attr.dummy) | |
1057 | { | |
1058 | tmp = gfc_get_symbol_decl (sym); | |
22d678e8 | 1059 | gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE |
4ee9c684 | 1060 | && TREE_CODE (TREE_TYPE (TREE_TYPE (tmp))) == FUNCTION_TYPE); |
1061 | ||
1062 | se->expr = tmp; | |
1063 | } | |
1064 | else | |
1065 | { | |
1066 | if (!sym->backend_decl) | |
1067 | sym->backend_decl = gfc_get_extern_function_decl (sym); | |
1068 | ||
1069 | tmp = sym->backend_decl; | |
22d678e8 | 1070 | gcc_assert (TREE_CODE (tmp) == FUNCTION_DECL); |
4ee9c684 | 1071 | se->expr = gfc_build_addr_expr (NULL, tmp); |
1072 | } | |
1073 | } | |
1074 | ||
1075 | ||
1076 | /* Generate code for a procedure call. Note can return se->post != NULL. | |
079d21d5 | 1077 | If se->direct_byref is set then se->expr contains the return parameter. |
89d91d02 | 1078 | Return nonzero, if the call has alternate specifiers. */ |
4ee9c684 | 1079 | |
079d21d5 | 1080 | int |
4ee9c684 | 1081 | gfc_conv_function_call (gfc_se * se, gfc_symbol * sym, |
1082 | gfc_actual_arglist * arg) | |
1083 | { | |
1084 | tree arglist; | |
1085 | tree tmp; | |
1086 | tree fntype; | |
1087 | gfc_se parmse; | |
1088 | gfc_ss *argss; | |
1089 | gfc_ss_info *info; | |
1090 | int byref; | |
1091 | tree type; | |
1092 | tree var; | |
1093 | tree len; | |
1094 | tree stringargs; | |
1095 | gfc_formal_arglist *formal; | |
079d21d5 | 1096 | int has_alternate_specifier = 0; |
4ee9c684 | 1097 | |
1098 | arglist = NULL_TREE; | |
1099 | stringargs = NULL_TREE; | |
1100 | var = NULL_TREE; | |
1101 | len = NULL_TREE; | |
1102 | ||
bf7e666b | 1103 | /* Obtain the string length now because it is needed often below. */ |
1104 | if (sym->ts.type == BT_CHARACTER) | |
1105 | { | |
1106 | gcc_assert (sym->ts.cl && sym->ts.cl->length | |
1107 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT); | |
1108 | len = gfc_conv_mpz_to_tree | |
1109 | (sym->ts.cl->length->value.integer, sym->ts.cl->length->ts.kind); | |
1110 | } | |
1111 | ||
4ee9c684 | 1112 | if (se->ss != NULL) |
1113 | { | |
1114 | if (!sym->attr.elemental) | |
1115 | { | |
22d678e8 | 1116 | gcc_assert (se->ss->type == GFC_SS_FUNCTION); |
4ee9c684 | 1117 | if (se->ss->useflags) |
1118 | { | |
22d678e8 | 1119 | gcc_assert (gfc_return_by_reference (sym) |
4ee9c684 | 1120 | && sym->result->attr.dimension); |
22d678e8 | 1121 | gcc_assert (se->loop != NULL); |
4ee9c684 | 1122 | |
1123 | /* Access the previously obtained result. */ | |
1124 | gfc_conv_tmp_array_ref (se); | |
1125 | gfc_advance_se_ss_chain (se); | |
bf7e666b | 1126 | |
1127 | /* Bundle in the string length. */ | |
4442ee19 | 1128 | se->string_length = len; |
079d21d5 | 1129 | return 0; |
4ee9c684 | 1130 | } |
1131 | } | |
1132 | info = &se->ss->data.info; | |
1133 | } | |
1134 | else | |
1135 | info = NULL; | |
1136 | ||
1137 | byref = gfc_return_by_reference (sym); | |
1138 | if (byref) | |
1139 | { | |
bf7e666b | 1140 | if (se->direct_byref) |
1141 | { | |
1142 | arglist = gfc_chainon_list (arglist, se->expr); | |
544c333b | 1143 | |
1144 | /* Add string length to argument list. */ | |
bf7e666b | 1145 | if (sym->ts.type == BT_CHARACTER) |
1146 | { | |
1147 | sym->ts.cl->backend_decl = len; | |
1148 | arglist = gfc_chainon_list (arglist, | |
1149 | convert (gfc_charlen_type_node, len)); | |
1150 | } | |
1151 | } | |
4ee9c684 | 1152 | else if (sym->result->attr.dimension) |
1153 | { | |
544c333b | 1154 | gcc_assert (se->loop && se->ss); |
bf7e666b | 1155 | |
4ee9c684 | 1156 | /* Set the type of the array. */ |
1157 | tmp = gfc_typenode_for_spec (&sym->ts); | |
544c333b | 1158 | info->dimen = se->loop->dimen; |
bf7e666b | 1159 | |
4ee9c684 | 1160 | /* Allocate a temporary to store the result. */ |
7949cb07 | 1161 | gfc_trans_allocate_temp_array (se->loop, info, tmp); |
4ee9c684 | 1162 | |
1163 | /* Zero the first stride to indicate a temporary. */ | |
1164 | tmp = | |
1165 | gfc_conv_descriptor_stride (info->descriptor, gfc_rank_cst[0]); | |
260abd71 | 1166 | gfc_add_modify_expr (&se->pre, tmp, |
1167 | convert (TREE_TYPE (tmp), integer_zero_node)); | |
544c333b | 1168 | |
4ee9c684 | 1169 | /* Pass the temporary as the first argument. */ |
1170 | tmp = info->descriptor; | |
1171 | tmp = gfc_build_addr_expr (NULL, tmp); | |
1172 | arglist = gfc_chainon_list (arglist, tmp); | |
bf7e666b | 1173 | |
1174 | /* Add string length to argument list. */ | |
1175 | if (sym->ts.type == BT_CHARACTER) | |
1176 | { | |
1177 | sym->ts.cl->backend_decl = len; | |
1178 | arglist = gfc_chainon_list (arglist, | |
1179 | convert (gfc_charlen_type_node, len)); | |
1180 | } | |
1181 | ||
4ee9c684 | 1182 | } |
1183 | else if (sym->ts.type == BT_CHARACTER) | |
1184 | { | |
544c333b | 1185 | |
1186 | /* Pass the string length. */ | |
4ee9c684 | 1187 | sym->ts.cl->backend_decl = len; |
1188 | type = gfc_get_character_type (sym->ts.kind, sym->ts.cl); | |
1189 | type = build_pointer_type (type); | |
1190 | ||
4442ee19 | 1191 | /* Return an address to a char[0:len-1]* temporary for character pointers. */ |
bf7e666b | 1192 | if (sym->attr.pointer || sym->attr.allocatable) |
1193 | { | |
4442ee19 | 1194 | /* Build char[0:len-1] * pstr. */ |
544c333b | 1195 | tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, |
4442ee19 | 1196 | build_int_cst (gfc_charlen_type_node, 1)); |
544c333b | 1197 | tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp); |
1198 | tmp = build_array_type (gfc_character1_type_node, tmp); | |
bf7e666b | 1199 | var = gfc_create_var (build_pointer_type (tmp), "pstr"); |
1200 | ||
544c333b | 1201 | /* Provide an address expression for the function arguments. */ |
1202 | var = gfc_build_addr_expr (NULL, var); | |
bf7e666b | 1203 | } |
1204 | else | |
1205 | { | |
544c333b | 1206 | var = gfc_conv_string_tmp (se, type, len); |
bf7e666b | 1207 | } |
4ee9c684 | 1208 | arglist = gfc_chainon_list (arglist, var); |
9ad09405 | 1209 | arglist = gfc_chainon_list (arglist, |
1210 | convert (gfc_charlen_type_node, len)); | |
4ee9c684 | 1211 | } |
e308bc81 | 1212 | else |
bdaed7d2 | 1213 | { |
1214 | gcc_assert (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX); | |
1215 | ||
1216 | type = gfc_get_complex_type (sym->ts.kind); | |
1217 | var = gfc_build_addr_expr (NULL, gfc_create_var (type, "cmplx")); | |
1218 | arglist = gfc_chainon_list (arglist, var); | |
1219 | } | |
4ee9c684 | 1220 | } |
1221 | ||
1222 | formal = sym->formal; | |
1223 | /* Evaluate the arguments. */ | |
1224 | for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL) | |
1225 | { | |
1226 | if (arg->expr == NULL) | |
1227 | { | |
1228 | ||
1229 | if (se->ignore_optional) | |
1230 | { | |
1231 | /* Some intrinsics have already been resolved to the correct | |
1232 | parameters. */ | |
1233 | continue; | |
1234 | } | |
1235 | else if (arg->label) | |
1236 | { | |
1237 | has_alternate_specifier = 1; | |
1238 | continue; | |
1239 | } | |
1240 | else | |
1241 | { | |
1242 | /* Pass a NULL pointer for an absent arg. */ | |
1243 | gfc_init_se (&parmse, NULL); | |
1244 | parmse.expr = null_pointer_node; | |
0fe9e56f | 1245 | if (arg->missing_arg_type == BT_CHARACTER) |
4ee9c684 | 1246 | { |
260abd71 | 1247 | stringargs = |
1248 | gfc_chainon_list (stringargs, | |
9ad09405 | 1249 | convert (gfc_charlen_type_node, |
260abd71 | 1250 | integer_zero_node)); |
4ee9c684 | 1251 | } |
1252 | } | |
1253 | } | |
1254 | else if (se->ss && se->ss->useflags) | |
1255 | { | |
1256 | /* An elemental function inside a scalarized loop. */ | |
1257 | gfc_init_se (&parmse, se); | |
1258 | gfc_conv_expr_reference (&parmse, arg->expr); | |
1259 | } | |
1260 | else | |
1261 | { | |
1262 | /* A scalar or transformational function. */ | |
1263 | gfc_init_se (&parmse, NULL); | |
1264 | argss = gfc_walk_expr (arg->expr); | |
1265 | ||
1266 | if (argss == gfc_ss_terminator) | |
1267 | { | |
1268 | gfc_conv_expr_reference (&parmse, arg->expr); | |
d6606878 | 1269 | if (formal && formal->sym->attr.pointer |
1270 | && arg->expr->expr_type != EXPR_NULL) | |
4ee9c684 | 1271 | { |
1272 | /* Scalar pointer dummy args require an extra level of | |
bf7e666b | 1273 | indirection. The null pointer already contains |
1274 | this level of indirection. */ | |
4ee9c684 | 1275 | parmse.expr = gfc_build_addr_expr (NULL, parmse.expr); |
1276 | } | |
1277 | } | |
1278 | else | |
1279 | { | |
f888a3fb | 1280 | /* If the procedure requires an explicit interface, the |
1281 | actual argument is passed according to the | |
1282 | corresponding formal argument. If the corresponding | |
1283 | formal argument is a POINTER or assumed shape, we do | |
231e961a | 1284 | not use g77's calling convention, and pass the |
f888a3fb | 1285 | address of the array descriptor instead. Otherwise we |
1286 | use g77's calling convention. */ | |
4ee9c684 | 1287 | int f; |
1288 | f = (formal != NULL) | |
1289 | && !formal->sym->attr.pointer | |
1290 | && formal->sym->as->type != AS_ASSUMED_SHAPE; | |
1291 | f = f || !sym->attr.always_explicit; | |
1292 | gfc_conv_array_parameter (&parmse, arg->expr, argss, f); | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | gfc_add_block_to_block (&se->pre, &parmse.pre); | |
1297 | gfc_add_block_to_block (&se->post, &parmse.post); | |
1298 | ||
7b3423b9 | 1299 | /* Character strings are passed as two parameters, a length and a |
4ee9c684 | 1300 | pointer. */ |
1301 | if (parmse.string_length != NULL_TREE) | |
1302 | stringargs = gfc_chainon_list (stringargs, parmse.string_length); | |
1303 | ||
1304 | arglist = gfc_chainon_list (arglist, parmse.expr); | |
1305 | } | |
1306 | ||
1307 | /* Add the hidden string length parameters to the arguments. */ | |
1308 | arglist = chainon (arglist, stringargs); | |
1309 | ||
1310 | /* Generate the actual call. */ | |
1311 | gfc_conv_function_val (se, sym); | |
1312 | /* If there are alternate return labels, function type should be | |
079d21d5 | 1313 | integer. Can't modify the type in place though, since it can be shared |
1314 | with other functions. */ | |
1315 | if (has_alternate_specifier | |
1316 | && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) != integer_type_node) | |
1317 | { | |
1318 | gcc_assert (! sym->attr.dummy); | |
1319 | TREE_TYPE (sym->backend_decl) | |
1320 | = build_function_type (integer_type_node, | |
1321 | TYPE_ARG_TYPES (TREE_TYPE (sym->backend_decl))); | |
1322 | se->expr = gfc_build_addr_expr (NULL, sym->backend_decl); | |
1323 | } | |
4ee9c684 | 1324 | |
1325 | fntype = TREE_TYPE (TREE_TYPE (se->expr)); | |
ed52ef8b | 1326 | se->expr = build3 (CALL_EXPR, TREE_TYPE (fntype), se->expr, |
1327 | arglist, NULL_TREE); | |
4ee9c684 | 1328 | |
fa069004 | 1329 | /* If we have a pointer function, but we don't want a pointer, e.g. |
1330 | something like | |
1331 | x = f() | |
1332 | where f is pointer valued, we have to dereference the result. */ | |
bdaed7d2 | 1333 | if (!se->want_pointer && !byref && sym->attr.pointer) |
fa069004 | 1334 | se->expr = gfc_build_indirect_ref (se->expr); |
1335 | ||
bdaed7d2 | 1336 | /* f2c calling conventions require a scalar default real function to |
1337 | return a double precision result. Convert this back to default | |
1338 | real. We only care about the cases that can happen in Fortran 77. | |
1339 | */ | |
1340 | if (gfc_option.flag_f2c && sym->ts.type == BT_REAL | |
1341 | && sym->ts.kind == gfc_default_real_kind | |
1342 | && !sym->attr.always_explicit) | |
1343 | se->expr = fold_convert (gfc_get_real_type (sym->ts.kind), se->expr); | |
1344 | ||
f888a3fb | 1345 | /* A pure function may still have side-effects - it may modify its |
1346 | parameters. */ | |
4ee9c684 | 1347 | TREE_SIDE_EFFECTS (se->expr) = 1; |
1348 | #if 0 | |
1349 | if (!sym->attr.pure) | |
1350 | TREE_SIDE_EFFECTS (se->expr) = 1; | |
1351 | #endif | |
1352 | ||
4396343e | 1353 | if (byref) |
4ee9c684 | 1354 | { |
4396343e | 1355 | /* Add the function call to the pre chain. There is no expression. */ |
4ee9c684 | 1356 | gfc_add_expr_to_block (&se->pre, se->expr); |
4396343e | 1357 | se->expr = NULL_TREE; |
4ee9c684 | 1358 | |
4396343e | 1359 | if (!se->direct_byref) |
4ee9c684 | 1360 | { |
65cf6ae7 | 1361 | if (sym->attr.dimension) |
4ee9c684 | 1362 | { |
4396343e | 1363 | if (flag_bounds_check) |
1364 | { | |
1365 | /* Check the data pointer hasn't been modified. This would | |
1366 | happen in a function returning a pointer. */ | |
94be45c9 | 1367 | tmp = gfc_conv_descriptor_data_get (info->descriptor); |
ed52ef8b | 1368 | tmp = build2 (NE_EXPR, boolean_type_node, tmp, info->data); |
4396343e | 1369 | gfc_trans_runtime_check (tmp, gfc_strconst_fault, &se->pre); |
1370 | } | |
1371 | se->expr = info->descriptor; | |
bf7e666b | 1372 | /* Bundle in the string length. */ |
1373 | se->string_length = len; | |
4ee9c684 | 1374 | } |
4396343e | 1375 | else if (sym->ts.type == BT_CHARACTER) |
544c333b | 1376 | { |
bf7e666b | 1377 | /* Dereference for character pointer results. */ |
1378 | if (sym->attr.pointer || sym->attr.allocatable) | |
544c333b | 1379 | se->expr = gfc_build_indirect_ref (var); |
1380 | else | |
bf7e666b | 1381 | se->expr = var; |
1382 | ||
4396343e | 1383 | se->string_length = len; |
1384 | } | |
1385 | else | |
bdaed7d2 | 1386 | { |
1387 | gcc_assert (sym->ts.type == BT_COMPLEX && gfc_option.flag_f2c); | |
1388 | se->expr = gfc_build_indirect_ref (var); | |
1389 | } | |
4ee9c684 | 1390 | } |
4ee9c684 | 1391 | } |
079d21d5 | 1392 | |
1393 | return has_alternate_specifier; | |
4ee9c684 | 1394 | } |
1395 | ||
1396 | ||
dbe60343 | 1397 | /* Generate code to copy a string. */ |
1398 | ||
1399 | static void | |
1400 | gfc_trans_string_copy (stmtblock_t * block, tree dlen, tree dest, | |
1401 | tree slen, tree src) | |
1402 | { | |
1403 | tree tmp; | |
1404 | ||
1405 | tmp = NULL_TREE; | |
1406 | tmp = gfc_chainon_list (tmp, dlen); | |
1407 | tmp = gfc_chainon_list (tmp, dest); | |
1408 | tmp = gfc_chainon_list (tmp, slen); | |
1409 | tmp = gfc_chainon_list (tmp, src); | |
1410 | tmp = gfc_build_function_call (gfor_fndecl_copy_string, tmp); | |
1411 | gfc_add_expr_to_block (block, tmp); | |
1412 | } | |
1413 | ||
1414 | ||
4ee9c684 | 1415 | /* Translate a statement function. |
1416 | The value of a statement function reference is obtained by evaluating the | |
1417 | expression using the values of the actual arguments for the values of the | |
1418 | corresponding dummy arguments. */ | |
1419 | ||
1420 | static void | |
1421 | gfc_conv_statement_function (gfc_se * se, gfc_expr * expr) | |
1422 | { | |
1423 | gfc_symbol *sym; | |
1424 | gfc_symbol *fsym; | |
1425 | gfc_formal_arglist *fargs; | |
1426 | gfc_actual_arglist *args; | |
1427 | gfc_se lse; | |
1428 | gfc_se rse; | |
dbe60343 | 1429 | gfc_saved_var *saved_vars; |
1430 | tree *temp_vars; | |
1431 | tree type; | |
1432 | tree tmp; | |
1433 | int n; | |
4ee9c684 | 1434 | |
1435 | sym = expr->symtree->n.sym; | |
1436 | args = expr->value.function.actual; | |
1437 | gfc_init_se (&lse, NULL); | |
1438 | gfc_init_se (&rse, NULL); | |
1439 | ||
dbe60343 | 1440 | n = 0; |
4ee9c684 | 1441 | for (fargs = sym->formal; fargs; fargs = fargs->next) |
dbe60343 | 1442 | n++; |
1443 | saved_vars = (gfc_saved_var *)gfc_getmem (n * sizeof (gfc_saved_var)); | |
1444 | temp_vars = (tree *)gfc_getmem (n * sizeof (tree)); | |
1445 | ||
1446 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) | |
4ee9c684 | 1447 | { |
1448 | /* Each dummy shall be specified, explicitly or implicitly, to be | |
1449 | scalar. */ | |
22d678e8 | 1450 | gcc_assert (fargs->sym->attr.dimension == 0); |
4ee9c684 | 1451 | fsym = fargs->sym; |
4ee9c684 | 1452 | |
dbe60343 | 1453 | /* Create a temporary to hold the value. */ |
1454 | type = gfc_typenode_for_spec (&fsym->ts); | |
1455 | temp_vars[n] = gfc_create_var (type, fsym->name); | |
1456 | ||
1457 | if (fsym->ts.type == BT_CHARACTER) | |
4ee9c684 | 1458 | { |
dbe60343 | 1459 | /* Copy string arguments. */ |
1460 | tree arglen; | |
4ee9c684 | 1461 | |
22d678e8 | 1462 | gcc_assert (fsym->ts.cl && fsym->ts.cl->length |
4ee9c684 | 1463 | && fsym->ts.cl->length->expr_type == EXPR_CONSTANT); |
1464 | ||
dbe60343 | 1465 | arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
1466 | tmp = gfc_build_addr_expr (build_pointer_type (type), | |
1467 | temp_vars[n]); | |
4ee9c684 | 1468 | |
1469 | gfc_conv_expr (&rse, args->expr); | |
1470 | gfc_conv_string_parameter (&rse); | |
4ee9c684 | 1471 | gfc_add_block_to_block (&se->pre, &lse.pre); |
1472 | gfc_add_block_to_block (&se->pre, &rse.pre); | |
1473 | ||
dbe60343 | 1474 | gfc_trans_string_copy (&se->pre, arglen, tmp, rse.string_length, |
1475 | rse.expr); | |
4ee9c684 | 1476 | gfc_add_block_to_block (&se->pre, &lse.post); |
1477 | gfc_add_block_to_block (&se->pre, &rse.post); | |
1478 | } | |
1479 | else | |
1480 | { | |
1481 | /* For everything else, just evaluate the expression. */ | |
4ee9c684 | 1482 | gfc_conv_expr (&lse, args->expr); |
1483 | ||
1484 | gfc_add_block_to_block (&se->pre, &lse.pre); | |
dbe60343 | 1485 | gfc_add_modify_expr (&se->pre, temp_vars[n], lse.expr); |
4ee9c684 | 1486 | gfc_add_block_to_block (&se->pre, &lse.post); |
1487 | } | |
dbe60343 | 1488 | |
4ee9c684 | 1489 | args = args->next; |
1490 | } | |
dbe60343 | 1491 | |
1492 | /* Use the temporary variables in place of the real ones. */ | |
1493 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) | |
1494 | gfc_shadow_sym (fargs->sym, temp_vars[n], &saved_vars[n]); | |
1495 | ||
4ee9c684 | 1496 | gfc_conv_expr (se, sym->value); |
dbe60343 | 1497 | |
1498 | if (sym->ts.type == BT_CHARACTER) | |
1499 | { | |
1500 | gfc_conv_const_charlen (sym->ts.cl); | |
1501 | ||
1502 | /* Force the expression to the correct length. */ | |
1503 | if (!INTEGER_CST_P (se->string_length) | |
1504 | || tree_int_cst_lt (se->string_length, | |
1505 | sym->ts.cl->backend_decl)) | |
1506 | { | |
1507 | type = gfc_get_character_type (sym->ts.kind, sym->ts.cl); | |
1508 | tmp = gfc_create_var (type, sym->name); | |
1509 | tmp = gfc_build_addr_expr (build_pointer_type (type), tmp); | |
1510 | gfc_trans_string_copy (&se->pre, sym->ts.cl->backend_decl, tmp, | |
1511 | se->string_length, se->expr); | |
1512 | se->expr = tmp; | |
1513 | } | |
1514 | se->string_length = sym->ts.cl->backend_decl; | |
1515 | } | |
1516 | ||
f888a3fb | 1517 | /* Restore the original variables. */ |
dbe60343 | 1518 | for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) |
1519 | gfc_restore_sym (fargs->sym, &saved_vars[n]); | |
1520 | gfc_free (saved_vars); | |
4ee9c684 | 1521 | } |
1522 | ||
1523 | ||
1524 | /* Translate a function expression. */ | |
1525 | ||
1526 | static void | |
1527 | gfc_conv_function_expr (gfc_se * se, gfc_expr * expr) | |
1528 | { | |
1529 | gfc_symbol *sym; | |
1530 | ||
1531 | if (expr->value.function.isym) | |
1532 | { | |
1533 | gfc_conv_intrinsic_function (se, expr); | |
1534 | return; | |
1535 | } | |
1536 | ||
f888a3fb | 1537 | /* We distinguish statement functions from general functions to improve |
4ee9c684 | 1538 | runtime performance. */ |
1539 | if (expr->symtree->n.sym->attr.proc == PROC_ST_FUNCTION) | |
1540 | { | |
1541 | gfc_conv_statement_function (se, expr); | |
1542 | return; | |
1543 | } | |
1544 | ||
1545 | /* expr.value.function.esym is the resolved (specific) function symbol for | |
1546 | most functions. However this isn't set for dummy procedures. */ | |
1547 | sym = expr->value.function.esym; | |
1548 | if (!sym) | |
1549 | sym = expr->symtree->n.sym; | |
1550 | gfc_conv_function_call (se, sym, expr->value.function.actual); | |
1551 | } | |
1552 | ||
f888a3fb | 1553 | |
4ee9c684 | 1554 | static void |
1555 | gfc_conv_array_constructor_expr (gfc_se * se, gfc_expr * expr) | |
1556 | { | |
22d678e8 | 1557 | gcc_assert (se->ss != NULL && se->ss != gfc_ss_terminator); |
1558 | gcc_assert (se->ss->expr == expr && se->ss->type == GFC_SS_CONSTRUCTOR); | |
4ee9c684 | 1559 | |
1560 | gfc_conv_tmp_array_ref (se); | |
1561 | gfc_advance_se_ss_chain (se); | |
1562 | } | |
1563 | ||
1564 | ||
bda1f152 | 1565 | /* Build a static initializer. EXPR is the expression for the initial value. |
f888a3fb | 1566 | The other parameters describe the variable of the component being |
1567 | initialized. EXPR may be null. */ | |
4ee9c684 | 1568 | |
bda1f152 | 1569 | tree |
1570 | gfc_conv_initializer (gfc_expr * expr, gfc_typespec * ts, tree type, | |
1571 | bool array, bool pointer) | |
1572 | { | |
1573 | gfc_se se; | |
1574 | ||
1575 | if (!(expr || pointer)) | |
1576 | return NULL_TREE; | |
1577 | ||
1578 | if (array) | |
1579 | { | |
1580 | /* Arrays need special handling. */ | |
1581 | if (pointer) | |
1582 | return gfc_build_null_descriptor (type); | |
1583 | else | |
1584 | return gfc_conv_array_initializer (type, expr); | |
1585 | } | |
1586 | else if (pointer) | |
1587 | return fold_convert (type, null_pointer_node); | |
1588 | else | |
1589 | { | |
1590 | switch (ts->type) | |
1591 | { | |
1592 | case BT_DERIVED: | |
1593 | gfc_init_se (&se, NULL); | |
1594 | gfc_conv_structure (&se, expr, 1); | |
1595 | return se.expr; | |
1596 | ||
1597 | case BT_CHARACTER: | |
1598 | return gfc_conv_string_init (ts->cl->backend_decl,expr); | |
1599 | ||
1600 | default: | |
1601 | gfc_init_se (&se, NULL); | |
1602 | gfc_conv_constant (&se, expr); | |
1603 | return se.expr; | |
1604 | } | |
1605 | } | |
1606 | } | |
1607 | ||
9a0aec1d | 1608 | static tree |
1609 | gfc_trans_subarray_assign (tree dest, gfc_component * cm, gfc_expr * expr) | |
1610 | { | |
1611 | gfc_se rse; | |
1612 | gfc_se lse; | |
1613 | gfc_ss *rss; | |
1614 | gfc_ss *lss; | |
1615 | stmtblock_t body; | |
1616 | stmtblock_t block; | |
1617 | gfc_loopinfo loop; | |
1618 | int n; | |
1619 | tree tmp; | |
1620 | ||
1621 | gfc_start_block (&block); | |
1622 | ||
1623 | /* Initialize the scalarizer. */ | |
1624 | gfc_init_loopinfo (&loop); | |
1625 | ||
1626 | gfc_init_se (&lse, NULL); | |
1627 | gfc_init_se (&rse, NULL); | |
1628 | ||
1629 | /* Walk the rhs. */ | |
1630 | rss = gfc_walk_expr (expr); | |
1631 | if (rss == gfc_ss_terminator) | |
1632 | { | |
1633 | /* The rhs is scalar. Add a ss for the expression. */ | |
1634 | rss = gfc_get_ss (); | |
1635 | rss->next = gfc_ss_terminator; | |
1636 | rss->type = GFC_SS_SCALAR; | |
1637 | rss->expr = expr; | |
1638 | } | |
1639 | ||
1640 | /* Create a SS for the destination. */ | |
1641 | lss = gfc_get_ss (); | |
1642 | lss->type = GFC_SS_COMPONENT; | |
1643 | lss->expr = NULL; | |
1644 | lss->shape = gfc_get_shape (cm->as->rank); | |
1645 | lss->next = gfc_ss_terminator; | |
1646 | lss->data.info.dimen = cm->as->rank; | |
1647 | lss->data.info.descriptor = dest; | |
1648 | lss->data.info.data = gfc_conv_array_data (dest); | |
1649 | lss->data.info.offset = gfc_conv_array_offset (dest); | |
1650 | for (n = 0; n < cm->as->rank; n++) | |
1651 | { | |
1652 | lss->data.info.dim[n] = n; | |
1653 | lss->data.info.start[n] = gfc_conv_array_lbound (dest, n); | |
1654 | lss->data.info.stride[n] = gfc_index_one_node; | |
1655 | ||
1656 | mpz_init (lss->shape[n]); | |
1657 | mpz_sub (lss->shape[n], cm->as->upper[n]->value.integer, | |
1658 | cm->as->lower[n]->value.integer); | |
1659 | mpz_add_ui (lss->shape[n], lss->shape[n], 1); | |
1660 | } | |
1661 | ||
1662 | /* Associate the SS with the loop. */ | |
1663 | gfc_add_ss_to_loop (&loop, lss); | |
1664 | gfc_add_ss_to_loop (&loop, rss); | |
1665 | ||
1666 | /* Calculate the bounds of the scalarization. */ | |
1667 | gfc_conv_ss_startstride (&loop); | |
1668 | ||
1669 | /* Setup the scalarizing loops. */ | |
1670 | gfc_conv_loop_setup (&loop); | |
1671 | ||
1672 | /* Setup the gfc_se structures. */ | |
1673 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
1674 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
1675 | ||
1676 | rse.ss = rss; | |
1677 | gfc_mark_ss_chain_used (rss, 1); | |
1678 | lse.ss = lss; | |
1679 | gfc_mark_ss_chain_used (lss, 1); | |
1680 | ||
1681 | /* Start the scalarized loop body. */ | |
1682 | gfc_start_scalarized_body (&loop, &body); | |
1683 | ||
1684 | gfc_conv_tmp_array_ref (&lse); | |
dc5fe211 | 1685 | if (cm->ts.type == BT_CHARACTER) |
1686 | lse.string_length = cm->ts.cl->backend_decl; | |
1687 | ||
9a0aec1d | 1688 | gfc_conv_expr (&rse, expr); |
1689 | ||
1690 | tmp = gfc_trans_scalar_assign (&lse, &rse, cm->ts.type); | |
1691 | gfc_add_expr_to_block (&body, tmp); | |
1692 | ||
22d678e8 | 1693 | gcc_assert (rse.ss == gfc_ss_terminator); |
9a0aec1d | 1694 | |
1695 | /* Generate the copying loops. */ | |
1696 | gfc_trans_scalarizing_loops (&loop, &body); | |
1697 | ||
1698 | /* Wrap the whole thing up. */ | |
1699 | gfc_add_block_to_block (&block, &loop.pre); | |
1700 | gfc_add_block_to_block (&block, &loop.post); | |
1701 | ||
9a0aec1d | 1702 | for (n = 0; n < cm->as->rank; n++) |
1703 | mpz_clear (lss->shape[n]); | |
1704 | gfc_free (lss->shape); | |
1705 | ||
6cf06ccd | 1706 | gfc_cleanup_loop (&loop); |
1707 | ||
9a0aec1d | 1708 | return gfc_finish_block (&block); |
1709 | } | |
1710 | ||
1711 | /* Assign a single component of a derived type constructor. */ | |
1712 | ||
1713 | static tree | |
1714 | gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr) | |
1715 | { | |
1716 | gfc_se se; | |
1717 | gfc_ss *rss; | |
1718 | stmtblock_t block; | |
1719 | tree tmp; | |
1720 | ||
1721 | gfc_start_block (&block); | |
1722 | if (cm->pointer) | |
1723 | { | |
1724 | gfc_init_se (&se, NULL); | |
1725 | /* Pointer component. */ | |
1726 | if (cm->dimension) | |
1727 | { | |
1728 | /* Array pointer. */ | |
1729 | if (expr->expr_type == EXPR_NULL) | |
94be45c9 | 1730 | gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
9a0aec1d | 1731 | else |
1732 | { | |
1733 | rss = gfc_walk_expr (expr); | |
1734 | se.direct_byref = 1; | |
1735 | se.expr = dest; | |
1736 | gfc_conv_expr_descriptor (&se, expr, rss); | |
1737 | gfc_add_block_to_block (&block, &se.pre); | |
1738 | gfc_add_block_to_block (&block, &se.post); | |
1739 | } | |
1740 | } | |
1741 | else | |
1742 | { | |
1743 | /* Scalar pointers. */ | |
1744 | se.want_pointer = 1; | |
1745 | gfc_conv_expr (&se, expr); | |
1746 | gfc_add_block_to_block (&block, &se.pre); | |
1747 | gfc_add_modify_expr (&block, dest, | |
1748 | fold_convert (TREE_TYPE (dest), se.expr)); | |
1749 | gfc_add_block_to_block (&block, &se.post); | |
1750 | } | |
1751 | } | |
1752 | else if (cm->dimension) | |
1753 | { | |
1754 | tmp = gfc_trans_subarray_assign (dest, cm, expr); | |
1755 | gfc_add_expr_to_block (&block, tmp); | |
1756 | } | |
1757 | else if (expr->ts.type == BT_DERIVED) | |
1758 | { | |
39fca56b | 1759 | /* Nested derived type. */ |
9a0aec1d | 1760 | tmp = gfc_trans_structure_assign (dest, expr); |
1761 | gfc_add_expr_to_block (&block, tmp); | |
1762 | } | |
1763 | else | |
1764 | { | |
1765 | /* Scalar component. */ | |
1766 | gfc_se lse; | |
1767 | ||
1768 | gfc_init_se (&se, NULL); | |
1769 | gfc_init_se (&lse, NULL); | |
1770 | ||
1771 | gfc_conv_expr (&se, expr); | |
1772 | if (cm->ts.type == BT_CHARACTER) | |
1773 | lse.string_length = cm->ts.cl->backend_decl; | |
1774 | lse.expr = dest; | |
1775 | tmp = gfc_trans_scalar_assign (&lse, &se, cm->ts.type); | |
1776 | gfc_add_expr_to_block (&block, tmp); | |
1777 | } | |
1778 | return gfc_finish_block (&block); | |
1779 | } | |
1780 | ||
39fca56b | 1781 | /* Assign a derived type constructor to a variable. */ |
9a0aec1d | 1782 | |
1783 | static tree | |
1784 | gfc_trans_structure_assign (tree dest, gfc_expr * expr) | |
1785 | { | |
1786 | gfc_constructor *c; | |
1787 | gfc_component *cm; | |
1788 | stmtblock_t block; | |
1789 | tree field; | |
1790 | tree tmp; | |
1791 | ||
1792 | gfc_start_block (&block); | |
1793 | cm = expr->ts.derived->components; | |
1794 | for (c = expr->value.constructor; c; c = c->next, cm = cm->next) | |
1795 | { | |
1796 | /* Skip absent members in default initializers. */ | |
1797 | if (!c->expr) | |
1798 | continue; | |
1799 | ||
1800 | field = cm->backend_decl; | |
ed52ef8b | 1801 | tmp = build3 (COMPONENT_REF, TREE_TYPE (field), dest, field, NULL_TREE); |
9a0aec1d | 1802 | tmp = gfc_trans_subcomponent_assign (tmp, cm, c->expr); |
1803 | gfc_add_expr_to_block (&block, tmp); | |
1804 | } | |
1805 | return gfc_finish_block (&block); | |
1806 | } | |
1807 | ||
4ee9c684 | 1808 | /* Build an expression for a constructor. If init is nonzero then |
1809 | this is part of a static variable initializer. */ | |
1810 | ||
1811 | void | |
1812 | gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init) | |
1813 | { | |
1814 | gfc_constructor *c; | |
1815 | gfc_component *cm; | |
4ee9c684 | 1816 | tree val; |
4ee9c684 | 1817 | tree type; |
9a0aec1d | 1818 | tree tmp; |
c75b4594 | 1819 | VEC(constructor_elt,gc) *v = NULL; |
4ee9c684 | 1820 | |
22d678e8 | 1821 | gcc_assert (se->ss == NULL); |
1822 | gcc_assert (expr->expr_type == EXPR_STRUCTURE); | |
4ee9c684 | 1823 | type = gfc_typenode_for_spec (&expr->ts); |
9a0aec1d | 1824 | |
1825 | if (!init) | |
1826 | { | |
1827 | /* Create a temporary variable and fill it in. */ | |
1828 | se->expr = gfc_create_var (type, expr->ts.derived->name); | |
1829 | tmp = gfc_trans_structure_assign (se->expr, expr); | |
1830 | gfc_add_expr_to_block (&se->pre, tmp); | |
1831 | return; | |
1832 | } | |
1833 | ||
4ee9c684 | 1834 | cm = expr->ts.derived->components; |
1835 | for (c = expr->value.constructor; c; c = c->next, cm = cm->next) | |
1836 | { | |
1837 | /* Skip absent members in default initializers. */ | |
1838 | if (!c->expr) | |
1839 | continue; | |
1840 | ||
9a0aec1d | 1841 | val = gfc_conv_initializer (c->expr, &cm->ts, |
1842 | TREE_TYPE (cm->backend_decl), cm->dimension, cm->pointer); | |
4ee9c684 | 1843 | |
c75b4594 | 1844 | /* Append it to the constructor list. */ |
1845 | CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val); | |
4ee9c684 | 1846 | } |
c75b4594 | 1847 | se->expr = build_constructor (type, v); |
4ee9c684 | 1848 | } |
1849 | ||
1850 | ||
f888a3fb | 1851 | /* Translate a substring expression. */ |
4ee9c684 | 1852 | |
1853 | static void | |
1854 | gfc_conv_substring_expr (gfc_se * se, gfc_expr * expr) | |
1855 | { | |
1856 | gfc_ref *ref; | |
1857 | ||
1858 | ref = expr->ref; | |
1859 | ||
22d678e8 | 1860 | gcc_assert (ref->type == REF_SUBSTRING); |
4ee9c684 | 1861 | |
1862 | se->expr = gfc_build_string_const(expr->value.character.length, | |
1863 | expr->value.character.string); | |
1864 | se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr))); | |
1865 | TYPE_STRING_FLAG (TREE_TYPE (se->expr))=1; | |
1866 | ||
1867 | gfc_conv_substring(se,ref,expr->ts.kind); | |
1868 | } | |
1869 | ||
1870 | ||
7b7afa03 | 1871 | /* Entry point for expression translation. Evaluates a scalar quantity. |
1872 | EXPR is the expression to be translated, and SE is the state structure if | |
1873 | called from within the scalarized. */ | |
4ee9c684 | 1874 | |
1875 | void | |
1876 | gfc_conv_expr (gfc_se * se, gfc_expr * expr) | |
1877 | { | |
1878 | if (se->ss && se->ss->expr == expr | |
1879 | && (se->ss->type == GFC_SS_SCALAR || se->ss->type == GFC_SS_REFERENCE)) | |
1880 | { | |
9a0aec1d | 1881 | /* Substitute a scalar expression evaluated outside the scalarization |
4ee9c684 | 1882 | loop. */ |
1883 | se->expr = se->ss->data.scalar.expr; | |
7949cb07 | 1884 | se->string_length = se->ss->string_length; |
4ee9c684 | 1885 | gfc_advance_se_ss_chain (se); |
1886 | return; | |
1887 | } | |
1888 | ||
1889 | switch (expr->expr_type) | |
1890 | { | |
1891 | case EXPR_OP: | |
1892 | gfc_conv_expr_op (se, expr); | |
1893 | break; | |
1894 | ||
1895 | case EXPR_FUNCTION: | |
1896 | gfc_conv_function_expr (se, expr); | |
1897 | break; | |
1898 | ||
1899 | case EXPR_CONSTANT: | |
1900 | gfc_conv_constant (se, expr); | |
1901 | break; | |
1902 | ||
1903 | case EXPR_VARIABLE: | |
1904 | gfc_conv_variable (se, expr); | |
1905 | break; | |
1906 | ||
1907 | case EXPR_NULL: | |
1908 | se->expr = null_pointer_node; | |
1909 | break; | |
1910 | ||
1911 | case EXPR_SUBSTRING: | |
1912 | gfc_conv_substring_expr (se, expr); | |
1913 | break; | |
1914 | ||
1915 | case EXPR_STRUCTURE: | |
1916 | gfc_conv_structure (se, expr, 0); | |
1917 | break; | |
1918 | ||
1919 | case EXPR_ARRAY: | |
1920 | gfc_conv_array_constructor_expr (se, expr); | |
1921 | break; | |
1922 | ||
1923 | default: | |
22d678e8 | 1924 | gcc_unreachable (); |
4ee9c684 | 1925 | break; |
1926 | } | |
1927 | } | |
1928 | ||
7b7afa03 | 1929 | /* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs |
1930 | of an assignment. */ | |
4ee9c684 | 1931 | void |
1932 | gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr) | |
1933 | { | |
1934 | gfc_conv_expr (se, expr); | |
7b7afa03 | 1935 | /* All numeric lvalues should have empty post chains. If not we need to |
4ee9c684 | 1936 | figure out a way of rewriting an lvalue so that it has no post chain. */ |
7b7afa03 | 1937 | gcc_assert (expr->ts.type == BT_CHARACTER || !se->post.head); |
4ee9c684 | 1938 | } |
1939 | ||
7b7afa03 | 1940 | /* Like gfc_conv_expr, but the POST block is guaranteed to be empty for |
1941 | numeric expressions. Used for scalar values whee inserting cleanup code | |
1942 | is inconvenient. */ | |
4ee9c684 | 1943 | void |
1944 | gfc_conv_expr_val (gfc_se * se, gfc_expr * expr) | |
1945 | { | |
1946 | tree val; | |
1947 | ||
22d678e8 | 1948 | gcc_assert (expr->ts.type != BT_CHARACTER); |
4ee9c684 | 1949 | gfc_conv_expr (se, expr); |
1950 | if (se->post.head) | |
1951 | { | |
1952 | val = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
1953 | gfc_add_modify_expr (&se->pre, val, se->expr); | |
7b7afa03 | 1954 | se->expr = val; |
1955 | gfc_add_block_to_block (&se->pre, &se->post); | |
4ee9c684 | 1956 | } |
1957 | } | |
1958 | ||
7b7afa03 | 1959 | /* Helper to translate and expression and convert it to a particular type. */ |
4ee9c684 | 1960 | void |
1961 | gfc_conv_expr_type (gfc_se * se, gfc_expr * expr, tree type) | |
1962 | { | |
1963 | gfc_conv_expr_val (se, expr); | |
1964 | se->expr = convert (type, se->expr); | |
1965 | } | |
1966 | ||
1967 | ||
f888a3fb | 1968 | /* Converts an expression so that it can be passed by reference. Scalar |
4ee9c684 | 1969 | values only. */ |
1970 | ||
1971 | void | |
1972 | gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr) | |
1973 | { | |
1974 | tree var; | |
1975 | ||
1976 | if (se->ss && se->ss->expr == expr | |
1977 | && se->ss->type == GFC_SS_REFERENCE) | |
1978 | { | |
1979 | se->expr = se->ss->data.scalar.expr; | |
7949cb07 | 1980 | se->string_length = se->ss->string_length; |
4ee9c684 | 1981 | gfc_advance_se_ss_chain (se); |
1982 | return; | |
1983 | } | |
1984 | ||
1985 | if (expr->ts.type == BT_CHARACTER) | |
1986 | { | |
1987 | gfc_conv_expr (se, expr); | |
1988 | gfc_conv_string_parameter (se); | |
1989 | return; | |
1990 | } | |
1991 | ||
1992 | if (expr->expr_type == EXPR_VARIABLE) | |
1993 | { | |
1994 | se->want_pointer = 1; | |
1995 | gfc_conv_expr (se, expr); | |
1996 | if (se->post.head) | |
1997 | { | |
1998 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
1999 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
2000 | gfc_add_block_to_block (&se->pre, &se->post); | |
2001 | se->expr = var; | |
2002 | } | |
2003 | return; | |
2004 | } | |
2005 | ||
2006 | gfc_conv_expr (se, expr); | |
2007 | ||
2008 | /* Create a temporary var to hold the value. */ | |
e67e5e1f | 2009 | if (TREE_CONSTANT (se->expr)) |
2010 | { | |
2011 | var = build_decl (CONST_DECL, NULL, TREE_TYPE (se->expr)); | |
2012 | DECL_INITIAL (var) = se->expr; | |
2013 | pushdecl (var); | |
2014 | } | |
2015 | else | |
2016 | { | |
2017 | var = gfc_create_var (TREE_TYPE (se->expr), NULL); | |
2018 | gfc_add_modify_expr (&se->pre, var, se->expr); | |
2019 | } | |
4ee9c684 | 2020 | gfc_add_block_to_block (&se->pre, &se->post); |
2021 | ||
2022 | /* Take the address of that value. */ | |
2023 | se->expr = gfc_build_addr_expr (NULL, var); | |
2024 | } | |
2025 | ||
2026 | ||
2027 | tree | |
2028 | gfc_trans_pointer_assign (gfc_code * code) | |
2029 | { | |
2030 | return gfc_trans_pointer_assignment (code->expr, code->expr2); | |
2031 | } | |
2032 | ||
2033 | ||
4396343e | 2034 | /* Generate code for a pointer assignment. */ |
2035 | ||
4ee9c684 | 2036 | tree |
2037 | gfc_trans_pointer_assignment (gfc_expr * expr1, gfc_expr * expr2) | |
2038 | { | |
2039 | gfc_se lse; | |
2040 | gfc_se rse; | |
2041 | gfc_ss *lss; | |
2042 | gfc_ss *rss; | |
2043 | stmtblock_t block; | |
7853829d | 2044 | tree desc; |
2045 | tree tmp; | |
4ee9c684 | 2046 | |
2047 | gfc_start_block (&block); | |
2048 | ||
2049 | gfc_init_se (&lse, NULL); | |
2050 | ||
2051 | lss = gfc_walk_expr (expr1); | |
2052 | rss = gfc_walk_expr (expr2); | |
2053 | if (lss == gfc_ss_terminator) | |
2054 | { | |
4396343e | 2055 | /* Scalar pointers. */ |
4ee9c684 | 2056 | lse.want_pointer = 1; |
2057 | gfc_conv_expr (&lse, expr1); | |
22d678e8 | 2058 | gcc_assert (rss == gfc_ss_terminator); |
4ee9c684 | 2059 | gfc_init_se (&rse, NULL); |
2060 | rse.want_pointer = 1; | |
2061 | gfc_conv_expr (&rse, expr2); | |
2062 | gfc_add_block_to_block (&block, &lse.pre); | |
2063 | gfc_add_block_to_block (&block, &rse.pre); | |
260abd71 | 2064 | gfc_add_modify_expr (&block, lse.expr, |
2065 | fold_convert (TREE_TYPE (lse.expr), rse.expr)); | |
4ee9c684 | 2066 | gfc_add_block_to_block (&block, &rse.post); |
2067 | gfc_add_block_to_block (&block, &lse.post); | |
2068 | } | |
2069 | else | |
2070 | { | |
4396343e | 2071 | /* Array pointer. */ |
4ee9c684 | 2072 | gfc_conv_expr_descriptor (&lse, expr1, lss); |
7853829d | 2073 | switch (expr2->expr_type) |
2074 | { | |
2075 | case EXPR_NULL: | |
2076 | /* Just set the data pointer to null. */ | |
2077 | gfc_conv_descriptor_data_set (&block, lse.expr, null_pointer_node); | |
2078 | break; | |
2079 | ||
2080 | case EXPR_VARIABLE: | |
2081 | /* Assign directly to the pointer's descriptor. */ | |
4ee9c684 | 2082 | lse.direct_byref = 1; |
7853829d | 2083 | gfc_conv_expr_descriptor (&lse, expr2, rss); |
2084 | break; | |
2085 | ||
2086 | default: | |
2087 | /* Assign to a temporary descriptor and then copy that | |
2088 | temporary to the pointer. */ | |
2089 | desc = lse.expr; | |
2090 | tmp = gfc_create_var (TREE_TYPE (desc), "ptrtemp"); | |
2091 | ||
2092 | lse.expr = tmp; | |
2093 | lse.direct_byref = 1; | |
2094 | gfc_conv_expr_descriptor (&lse, expr2, rss); | |
2095 | gfc_add_modify_expr (&lse.pre, desc, tmp); | |
2096 | break; | |
4ee9c684 | 2097 | } |
2098 | gfc_add_block_to_block (&block, &lse.pre); | |
2099 | gfc_add_block_to_block (&block, &lse.post); | |
2100 | } | |
2101 | return gfc_finish_block (&block); | |
2102 | } | |
2103 | ||
2104 | ||
2105 | /* Makes sure se is suitable for passing as a function string parameter. */ | |
2106 | /* TODO: Need to check all callers fo this function. It may be abused. */ | |
2107 | ||
2108 | void | |
2109 | gfc_conv_string_parameter (gfc_se * se) | |
2110 | { | |
2111 | tree type; | |
2112 | ||
2113 | if (TREE_CODE (se->expr) == STRING_CST) | |
2114 | { | |
2115 | se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); | |
2116 | return; | |
2117 | } | |
2118 | ||
2119 | type = TREE_TYPE (se->expr); | |
2120 | if (TYPE_STRING_FLAG (type)) | |
2121 | { | |
22d678e8 | 2122 | gcc_assert (TREE_CODE (se->expr) != INDIRECT_REF); |
4ee9c684 | 2123 | se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); |
2124 | } | |
2125 | ||
22d678e8 | 2126 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (se->expr))); |
2127 | gcc_assert (se->string_length | |
4ee9c684 | 2128 | && TREE_CODE (TREE_TYPE (se->string_length)) == INTEGER_TYPE); |
2129 | } | |
2130 | ||
2131 | ||
2132 | /* Generate code for assignment of scalar variables. Includes character | |
2133 | strings. */ | |
2134 | ||
2135 | tree | |
2136 | gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, bt type) | |
2137 | { | |
4ee9c684 | 2138 | stmtblock_t block; |
2139 | ||
2140 | gfc_init_block (&block); | |
2141 | ||
4ee9c684 | 2142 | if (type == BT_CHARACTER) |
2143 | { | |
22d678e8 | 2144 | gcc_assert (lse->string_length != NULL_TREE |
4ee9c684 | 2145 | && rse->string_length != NULL_TREE); |
2146 | ||
2147 | gfc_conv_string_parameter (lse); | |
2148 | gfc_conv_string_parameter (rse); | |
2149 | ||
2150 | gfc_add_block_to_block (&block, &lse->pre); | |
2151 | gfc_add_block_to_block (&block, &rse->pre); | |
2152 | ||
dbe60343 | 2153 | gfc_trans_string_copy (&block, lse->string_length, lse->expr, |
2154 | rse->string_length, rse->expr); | |
4ee9c684 | 2155 | } |
2156 | else | |
2157 | { | |
2158 | gfc_add_block_to_block (&block, &lse->pre); | |
2159 | gfc_add_block_to_block (&block, &rse->pre); | |
2160 | ||
260abd71 | 2161 | gfc_add_modify_expr (&block, lse->expr, |
2162 | fold_convert (TREE_TYPE (lse->expr), rse->expr)); | |
4ee9c684 | 2163 | } |
2164 | ||
2165 | gfc_add_block_to_block (&block, &lse->post); | |
2166 | gfc_add_block_to_block (&block, &rse->post); | |
2167 | ||
2168 | return gfc_finish_block (&block); | |
2169 | } | |
2170 | ||
2171 | ||
2172 | /* Try to translate array(:) = func (...), where func is a transformational | |
2173 | array function, without using a temporary. Returns NULL is this isn't the | |
2174 | case. */ | |
2175 | ||
2176 | static tree | |
2177 | gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2) | |
2178 | { | |
2179 | gfc_se se; | |
2180 | gfc_ss *ss; | |
2181 | ||
2182 | /* The caller has already checked rank>0 and expr_type == EXPR_FUNCTION. */ | |
2183 | if (expr2->value.function.isym && !gfc_is_intrinsic_libcall (expr2)) | |
2184 | return NULL; | |
2185 | ||
2186 | /* Elemental functions don't need a temporary anyway. */ | |
2187 | if (expr2->symtree->n.sym->attr.elemental) | |
2188 | return NULL; | |
2189 | ||
2190 | /* Check for a dependency. */ | |
2191 | if (gfc_check_fncall_dependency (expr1, expr2)) | |
2192 | return NULL; | |
2193 | ||
2194 | /* The frontend doesn't seem to bother filling in expr->symtree for intrinsic | |
2195 | functions. */ | |
22d678e8 | 2196 | gcc_assert (expr2->value.function.isym |
e2293887 | 2197 | || (gfc_return_by_reference (expr2->value.function.esym) |
2198 | && expr2->value.function.esym->result->attr.dimension)); | |
4ee9c684 | 2199 | |
2200 | ss = gfc_walk_expr (expr1); | |
22d678e8 | 2201 | gcc_assert (ss != gfc_ss_terminator); |
4ee9c684 | 2202 | gfc_init_se (&se, NULL); |
2203 | gfc_start_block (&se.pre); | |
2204 | se.want_pointer = 1; | |
2205 | ||
2206 | gfc_conv_array_parameter (&se, expr1, ss, 0); | |
2207 | ||
2208 | se.direct_byref = 1; | |
2209 | se.ss = gfc_walk_expr (expr2); | |
22d678e8 | 2210 | gcc_assert (se.ss != gfc_ss_terminator); |
4ee9c684 | 2211 | gfc_conv_function_expr (&se, expr2); |
4ee9c684 | 2212 | gfc_add_block_to_block (&se.pre, &se.post); |
2213 | ||
2214 | return gfc_finish_block (&se.pre); | |
2215 | } | |
2216 | ||
2217 | ||
2218 | /* Translate an assignment. Most of the code is concerned with | |
2219 | setting up the scalarizer. */ | |
2220 | ||
2221 | tree | |
2222 | gfc_trans_assignment (gfc_expr * expr1, gfc_expr * expr2) | |
2223 | { | |
2224 | gfc_se lse; | |
2225 | gfc_se rse; | |
2226 | gfc_ss *lss; | |
2227 | gfc_ss *lss_section; | |
2228 | gfc_ss *rss; | |
2229 | gfc_loopinfo loop; | |
2230 | tree tmp; | |
2231 | stmtblock_t block; | |
2232 | stmtblock_t body; | |
2233 | ||
2234 | /* Special case a single function returning an array. */ | |
2235 | if (expr2->expr_type == EXPR_FUNCTION && expr2->rank > 0) | |
2236 | { | |
2237 | tmp = gfc_trans_arrayfunc_assign (expr1, expr2); | |
2238 | if (tmp) | |
2239 | return tmp; | |
2240 | } | |
2241 | ||
2242 | /* Assignment of the form lhs = rhs. */ | |
2243 | gfc_start_block (&block); | |
2244 | ||
2245 | gfc_init_se (&lse, NULL); | |
2246 | gfc_init_se (&rse, NULL); | |
2247 | ||
2248 | /* Walk the lhs. */ | |
2249 | lss = gfc_walk_expr (expr1); | |
2250 | rss = NULL; | |
2251 | if (lss != gfc_ss_terminator) | |
2252 | { | |
2253 | /* The assignment needs scalarization. */ | |
2254 | lss_section = lss; | |
2255 | ||
2256 | /* Find a non-scalar SS from the lhs. */ | |
2257 | while (lss_section != gfc_ss_terminator | |
2258 | && lss_section->type != GFC_SS_SECTION) | |
2259 | lss_section = lss_section->next; | |
2260 | ||
22d678e8 | 2261 | gcc_assert (lss_section != gfc_ss_terminator); |
4ee9c684 | 2262 | |
2263 | /* Initialize the scalarizer. */ | |
2264 | gfc_init_loopinfo (&loop); | |
2265 | ||
2266 | /* Walk the rhs. */ | |
2267 | rss = gfc_walk_expr (expr2); | |
2268 | if (rss == gfc_ss_terminator) | |
2269 | { | |
2270 | /* The rhs is scalar. Add a ss for the expression. */ | |
2271 | rss = gfc_get_ss (); | |
2272 | rss->next = gfc_ss_terminator; | |
2273 | rss->type = GFC_SS_SCALAR; | |
2274 | rss->expr = expr2; | |
2275 | } | |
2276 | /* Associate the SS with the loop. */ | |
2277 | gfc_add_ss_to_loop (&loop, lss); | |
2278 | gfc_add_ss_to_loop (&loop, rss); | |
2279 | ||
2280 | /* Calculate the bounds of the scalarization. */ | |
2281 | gfc_conv_ss_startstride (&loop); | |
2282 | /* Resolve any data dependencies in the statement. */ | |
2283 | gfc_conv_resolve_dependencies (&loop, lss_section, rss); | |
2284 | /* Setup the scalarizing loops. */ | |
2285 | gfc_conv_loop_setup (&loop); | |
2286 | ||
2287 | /* Setup the gfc_se structures. */ | |
2288 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
2289 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
2290 | ||
2291 | rse.ss = rss; | |
2292 | gfc_mark_ss_chain_used (rss, 1); | |
2293 | if (loop.temp_ss == NULL) | |
2294 | { | |
2295 | lse.ss = lss; | |
2296 | gfc_mark_ss_chain_used (lss, 1); | |
2297 | } | |
2298 | else | |
2299 | { | |
2300 | lse.ss = loop.temp_ss; | |
2301 | gfc_mark_ss_chain_used (lss, 3); | |
2302 | gfc_mark_ss_chain_used (loop.temp_ss, 3); | |
2303 | } | |
2304 | ||
2305 | /* Start the scalarized loop body. */ | |
2306 | gfc_start_scalarized_body (&loop, &body); | |
2307 | } | |
2308 | else | |
2309 | gfc_init_block (&body); | |
2310 | ||
2311 | /* Translate the expression. */ | |
2312 | gfc_conv_expr (&rse, expr2); | |
2313 | ||
2314 | if (lss != gfc_ss_terminator && loop.temp_ss != NULL) | |
2315 | { | |
2316 | gfc_conv_tmp_array_ref (&lse); | |
2317 | gfc_advance_se_ss_chain (&lse); | |
2318 | } | |
2319 | else | |
2320 | gfc_conv_expr (&lse, expr1); | |
544c333b | 2321 | |
4ee9c684 | 2322 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts.type); |
2323 | gfc_add_expr_to_block (&body, tmp); | |
2324 | ||
2325 | if (lss == gfc_ss_terminator) | |
2326 | { | |
2327 | /* Use the scalar assignment as is. */ | |
2328 | gfc_add_block_to_block (&block, &body); | |
2329 | } | |
2330 | else | |
2331 | { | |
22d678e8 | 2332 | gcc_assert (lse.ss == gfc_ss_terminator |
2333 | && rse.ss == gfc_ss_terminator); | |
4ee9c684 | 2334 | |
2335 | if (loop.temp_ss != NULL) | |
2336 | { | |
2337 | gfc_trans_scalarized_loop_boundary (&loop, &body); | |
2338 | ||
2339 | /* We need to copy the temporary to the actual lhs. */ | |
2340 | gfc_init_se (&lse, NULL); | |
2341 | gfc_init_se (&rse, NULL); | |
2342 | gfc_copy_loopinfo_to_se (&lse, &loop); | |
2343 | gfc_copy_loopinfo_to_se (&rse, &loop); | |
2344 | ||
2345 | rse.ss = loop.temp_ss; | |
2346 | lse.ss = lss; | |
2347 | ||
2348 | gfc_conv_tmp_array_ref (&rse); | |
2349 | gfc_advance_se_ss_chain (&rse); | |
2350 | gfc_conv_expr (&lse, expr1); | |
2351 | ||
22d678e8 | 2352 | gcc_assert (lse.ss == gfc_ss_terminator |
2353 | && rse.ss == gfc_ss_terminator); | |
4ee9c684 | 2354 | |
2355 | tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts.type); | |
2356 | gfc_add_expr_to_block (&body, tmp); | |
2357 | } | |
2358 | /* Generate the copying loops. */ | |
2359 | gfc_trans_scalarizing_loops (&loop, &body); | |
2360 | ||
2361 | /* Wrap the whole thing up. */ | |
2362 | gfc_add_block_to_block (&block, &loop.pre); | |
2363 | gfc_add_block_to_block (&block, &loop.post); | |
2364 | ||
2365 | gfc_cleanup_loop (&loop); | |
2366 | } | |
2367 | ||
2368 | return gfc_finish_block (&block); | |
2369 | } | |
2370 | ||
2371 | tree | |
2372 | gfc_trans_assign (gfc_code * code) | |
2373 | { | |
2374 | return gfc_trans_assignment (code->expr, code->expr2); | |
2375 | } |