1 /* Expression translation
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software
4 Contributed by Paul Brook <paul@nowt.org>
5 and Steven Bosscher <s.bosscher@student.tudelft.nl>
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
23 /* trans-expr.c-- generate GENERIC trees for gfc_expr. */
27 #include "coretypes.h"
33 #include "tree-gimple.h"
34 #include "langhooks.h"
38 #include "trans-const.h"
39 #include "trans-types.h"
40 #include "trans-array.h"
41 /* Only for gfc_trans_assign and gfc_trans_pointer_assign. */
42 #include "trans-stmt.h"
43 #include "dependency.h"
45 static tree gfc_trans_structure_assign (tree dest, gfc_expr * expr);
46 static int gfc_apply_interface_mapping_to_expr (gfc_interface_mapping *,
49 /* Copy the scalarization loop variables. */
52 gfc_copy_se_loopvars (gfc_se * dest, gfc_se * src)
55 dest->loop = src->loop;
59 /* Initialize a simple expression holder.
61 Care must be taken when multiple se are created with the same parent.
62 The child se must be kept in sync. The easiest way is to delay creation
63 of a child se until after after the previous se has been translated. */
66 gfc_init_se (gfc_se * se, gfc_se * parent)
68 memset (se, 0, sizeof (gfc_se));
69 gfc_init_block (&se->pre);
70 gfc_init_block (&se->post);
75 gfc_copy_se_loopvars (se, parent);
79 /* Advances to the next SS in the chain. Use this rather than setting
80 se->ss = se->ss->next because all the parents needs to be kept in sync.
84 gfc_advance_se_ss_chain (gfc_se * se)
88 gcc_assert (se != NULL && se->ss != NULL && se->ss != gfc_ss_terminator);
91 /* Walk down the parent chain. */
94 /* Simple consistency check. */
95 gcc_assert (p->parent == NULL || p->parent->ss == p->ss);
104 /* Ensures the result of the expression as either a temporary variable
105 or a constant so that it can be used repeatedly. */
108 gfc_make_safe_expr (gfc_se * se)
112 if (CONSTANT_CLASS_P (se->expr))
115 /* We need a temporary for this result. */
116 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
117 gfc_add_modify_expr (&se->pre, var, se->expr);
122 /* Return an expression which determines if a dummy parameter is present.
123 Also used for arguments to procedures with multiple entry points. */
126 gfc_conv_expr_present (gfc_symbol * sym)
130 gcc_assert (sym->attr.dummy);
132 decl = gfc_get_symbol_decl (sym);
133 if (TREE_CODE (decl) != PARM_DECL)
135 /* Array parameters use a temporary descriptor, we want the real
137 gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (decl))
138 || GFC_ARRAY_TYPE_P (TREE_TYPE (decl)));
139 decl = GFC_DECL_SAVED_DESCRIPTOR (decl);
141 return build2 (NE_EXPR, boolean_type_node, decl,
142 fold_convert (TREE_TYPE (decl), null_pointer_node));
146 /* Converts a missing, dummy argument into a null or zero. */
149 gfc_conv_missing_dummy (gfc_se * se, gfc_expr * arg, gfc_typespec ts)
154 present = gfc_conv_expr_present (arg->symtree->n.sym);
155 tmp = build3 (COND_EXPR, TREE_TYPE (se->expr), present, se->expr,
156 fold_convert (TREE_TYPE (se->expr), integer_zero_node));
158 tmp = gfc_evaluate_now (tmp, &se->pre);
160 if (ts.type == BT_CHARACTER)
162 tmp = build_int_cst (gfc_charlen_type_node, 0);
163 tmp = build3 (COND_EXPR, gfc_charlen_type_node, present,
164 se->string_length, tmp);
165 tmp = gfc_evaluate_now (tmp, &se->pre);
166 se->string_length = tmp;
172 /* Get the character length of an expression, looking through gfc_refs
176 gfc_get_expr_charlen (gfc_expr *e)
181 gcc_assert (e->expr_type == EXPR_VARIABLE
182 && e->ts.type == BT_CHARACTER);
184 length = NULL; /* To silence compiler warning. */
186 /* First candidate: if the variable is of type CHARACTER, the
187 expression's length could be the length of the character
189 if (e->symtree->n.sym->ts.type == BT_CHARACTER)
190 length = e->symtree->n.sym->ts.cl->backend_decl;
192 /* Look through the reference chain for component references. */
193 for (r = e->ref; r; r = r->next)
198 if (r->u.c.component->ts.type == BT_CHARACTER)
199 length = r->u.c.component->ts.cl->backend_decl;
207 /* We should never got substring references here. These will be
208 broken down by the scalarizer. */
213 gcc_assert (length != NULL);
219 /* Generate code to initialize a string length variable. Returns the
223 gfc_trans_init_string_length (gfc_charlen * cl, stmtblock_t * pblock)
228 gfc_init_se (&se, NULL);
229 gfc_conv_expr_type (&se, cl->length, gfc_charlen_type_node);
230 se.expr = fold_build2 (MAX_EXPR, gfc_charlen_type_node, se.expr,
231 build_int_cst (gfc_charlen_type_node, 0));
232 gfc_add_block_to_block (pblock, &se.pre);
234 tmp = cl->backend_decl;
235 gfc_add_modify_expr (pblock, tmp, se.expr);
240 gfc_conv_substring (gfc_se * se, gfc_ref * ref, int kind,
241 const char *name, locus *where)
251 type = gfc_get_character_type (kind, ref->u.ss.length);
252 type = build_pointer_type (type);
255 gfc_init_se (&start, se);
256 gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node);
257 gfc_add_block_to_block (&se->pre, &start.pre);
259 if (integer_onep (start.expr))
260 gfc_conv_string_parameter (se);
263 /* Avoid multiple evaluation of substring start. */
264 if (!CONSTANT_CLASS_P (start.expr) && !DECL_P (start.expr))
265 start.expr = gfc_evaluate_now (start.expr, &se->pre);
267 /* Change the start of the string. */
268 if (TYPE_STRING_FLAG (TREE_TYPE (se->expr)))
271 tmp = build_fold_indirect_ref (se->expr);
272 tmp = gfc_build_array_ref (tmp, start.expr);
273 se->expr = gfc_build_addr_expr (type, tmp);
276 /* Length = end + 1 - start. */
277 gfc_init_se (&end, se);
278 if (ref->u.ss.end == NULL)
279 end.expr = se->string_length;
282 gfc_conv_expr_type (&end, ref->u.ss.end, gfc_charlen_type_node);
283 gfc_add_block_to_block (&se->pre, &end.pre);
285 if (!CONSTANT_CLASS_P (end.expr) && !DECL_P (end.expr))
286 end.expr = gfc_evaluate_now (end.expr, &se->pre);
288 if (flag_bounds_check)
290 tree nonempty = fold_build2 (LE_EXPR, boolean_type_node,
291 start.expr, end.expr);
293 /* Check lower bound. */
294 fault = fold_build2 (LT_EXPR, boolean_type_node, start.expr,
295 build_int_cst (gfc_charlen_type_node, 1));
296 fault = fold_build2 (TRUTH_ANDIF_EXPR, boolean_type_node,
299 asprintf (&msg, "Substring out of bounds: lower bound (%%ld) of '%s' "
300 "is less than one", name);
302 asprintf (&msg, "Substring out of bounds: lower bound (%%ld)"
304 gfc_trans_runtime_check (fault, &se->pre, where, msg,
305 fold_convert (long_integer_type_node,
309 /* Check upper bound. */
310 fault = fold_build2 (GT_EXPR, boolean_type_node, end.expr,
312 fault = fold_build2 (TRUTH_ANDIF_EXPR, boolean_type_node,
315 asprintf (&msg, "Substring out of bounds: upper bound (%%ld) of '%s' "
316 "exceeds string length (%%ld)", name);
318 asprintf (&msg, "Substring out of bounds: upper bound (%%ld) "
319 "exceeds string length (%%ld)");
320 gfc_trans_runtime_check (fault, &se->pre, where, msg,
321 fold_convert (long_integer_type_node, end.expr),
322 fold_convert (long_integer_type_node,
327 tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node,
328 build_int_cst (gfc_charlen_type_node, 1),
330 tmp = fold_build2 (PLUS_EXPR, gfc_charlen_type_node, end.expr, tmp);
331 tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp,
332 build_int_cst (gfc_charlen_type_node, 0));
333 se->string_length = tmp;
337 /* Convert a derived type component reference. */
340 gfc_conv_component_ref (gfc_se * se, gfc_ref * ref)
347 c = ref->u.c.component;
349 gcc_assert (c->backend_decl);
351 field = c->backend_decl;
352 gcc_assert (TREE_CODE (field) == FIELD_DECL);
354 tmp = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE);
358 if (c->ts.type == BT_CHARACTER)
360 tmp = c->ts.cl->backend_decl;
361 /* Components must always be constant length. */
362 gcc_assert (tmp && INTEGER_CST_P (tmp));
363 se->string_length = tmp;
366 if (c->pointer && c->dimension == 0 && c->ts.type != BT_CHARACTER)
367 se->expr = build_fold_indirect_ref (se->expr);
371 /* Return the contents of a variable. Also handles reference/pointer
372 variables (all Fortran pointer references are implicit). */
375 gfc_conv_variable (gfc_se * se, gfc_expr * expr)
382 bool alternate_entry;
385 sym = expr->symtree->n.sym;
388 /* Check that something hasn't gone horribly wrong. */
389 gcc_assert (se->ss != gfc_ss_terminator);
390 gcc_assert (se->ss->expr == expr);
392 /* A scalarized term. We already know the descriptor. */
393 se->expr = se->ss->data.info.descriptor;
394 se->string_length = se->ss->string_length;
395 for (ref = se->ss->data.info.ref; ref; ref = ref->next)
396 if (ref->type == REF_ARRAY && ref->u.ar.type != AR_ELEMENT)
401 tree se_expr = NULL_TREE;
403 se->expr = gfc_get_symbol_decl (sym);
405 /* Deal with references to a parent results or entries by storing
406 the current_function_decl and moving to the parent_decl. */
407 return_value = sym->attr.function && sym->result == sym;
408 alternate_entry = sym->attr.function && sym->attr.entry
409 && sym->result == sym;
410 entry_master = sym->attr.result
411 && sym->ns->proc_name->attr.entry_master
412 && !gfc_return_by_reference (sym->ns->proc_name);
413 parent_decl = DECL_CONTEXT (current_function_decl);
415 if ((se->expr == parent_decl && return_value)
416 || (sym->ns && sym->ns->proc_name
418 && sym->ns->proc_name->backend_decl == parent_decl
419 && (alternate_entry || entry_master)))
424 /* Special case for assigning the return value of a function.
425 Self recursive functions must have an explicit return value. */
426 if (return_value && (se->expr == current_function_decl || parent_flag))
427 se_expr = gfc_get_fake_result_decl (sym, parent_flag);
429 /* Similarly for alternate entry points. */
430 else if (alternate_entry
431 && (sym->ns->proc_name->backend_decl == current_function_decl
434 gfc_entry_list *el = NULL;
436 for (el = sym->ns->entries; el; el = el->next)
439 se_expr = gfc_get_fake_result_decl (sym, parent_flag);
444 else if (entry_master
445 && (sym->ns->proc_name->backend_decl == current_function_decl
447 se_expr = gfc_get_fake_result_decl (sym, parent_flag);
452 /* Procedure actual arguments. */
453 else if (sym->attr.flavor == FL_PROCEDURE
454 && se->expr != current_function_decl)
456 gcc_assert (se->want_pointer);
457 if (!sym->attr.dummy)
459 gcc_assert (TREE_CODE (se->expr) == FUNCTION_DECL);
460 se->expr = build_fold_addr_expr (se->expr);
466 /* Dereference the expression, where needed. Since characters
467 are entirely different from other types, they are treated
469 if (sym->ts.type == BT_CHARACTER)
471 /* Dereference character pointer dummy arguments
473 if ((sym->attr.pointer || sym->attr.allocatable)
475 || sym->attr.function
476 || sym->attr.result))
477 se->expr = build_fold_indirect_ref (se->expr);
480 else if (!sym->attr.value)
482 /* Dereference non-character scalar dummy arguments. */
483 if (sym->attr.dummy && !sym->attr.dimension)
484 se->expr = build_fold_indirect_ref (se->expr);
486 /* Dereference scalar hidden result. */
487 if (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX
488 && (sym->attr.function || sym->attr.result)
489 && !sym->attr.dimension && !sym->attr.pointer)
490 se->expr = build_fold_indirect_ref (se->expr);
492 /* Dereference non-character pointer variables.
493 These must be dummies, results, or scalars. */
494 if ((sym->attr.pointer || sym->attr.allocatable)
496 || sym->attr.function
498 || !sym->attr.dimension))
499 se->expr = build_fold_indirect_ref (se->expr);
505 /* For character variables, also get the length. */
506 if (sym->ts.type == BT_CHARACTER)
508 /* If the character length of an entry isn't set, get the length from
509 the master function instead. */
510 if (sym->attr.entry && !sym->ts.cl->backend_decl)
511 se->string_length = sym->ns->proc_name->ts.cl->backend_decl;
513 se->string_length = sym->ts.cl->backend_decl;
514 gcc_assert (se->string_length);
522 /* Return the descriptor if that's what we want and this is an array
523 section reference. */
524 if (se->descriptor_only && ref->u.ar.type != AR_ELEMENT)
526 /* TODO: Pointers to single elements of array sections, eg elemental subs. */
527 /* Return the descriptor for array pointers and allocations. */
529 && ref->next == NULL && (se->descriptor_only))
532 gfc_conv_array_ref (se, &ref->u.ar, sym, &expr->where);
533 /* Return a pointer to an element. */
537 gfc_conv_component_ref (se, ref);
541 gfc_conv_substring (se, ref, expr->ts.kind,
542 expr->symtree->name, &expr->where);
551 /* Pointer assignment, allocation or pass by reference. Arrays are handled
553 if (se->want_pointer)
555 if (expr->ts.type == BT_CHARACTER)
556 gfc_conv_string_parameter (se);
558 se->expr = build_fold_addr_expr (se->expr);
563 /* Unary ops are easy... Or they would be if ! was a valid op. */
566 gfc_conv_unary_op (enum tree_code code, gfc_se * se, gfc_expr * expr)
571 gcc_assert (expr->ts.type != BT_CHARACTER);
572 /* Initialize the operand. */
573 gfc_init_se (&operand, se);
574 gfc_conv_expr_val (&operand, expr->value.op.op1);
575 gfc_add_block_to_block (&se->pre, &operand.pre);
577 type = gfc_typenode_for_spec (&expr->ts);
579 /* TRUTH_NOT_EXPR is not a "true" unary operator in GCC.
580 We must convert it to a compare to 0 (e.g. EQ_EXPR (op1, 0)).
581 All other unary operators have an equivalent GIMPLE unary operator. */
582 if (code == TRUTH_NOT_EXPR)
583 se->expr = build2 (EQ_EXPR, type, operand.expr,
584 build_int_cst (type, 0));
586 se->expr = build1 (code, type, operand.expr);
590 /* Expand power operator to optimal multiplications when a value is raised
591 to a constant integer n. See section 4.6.3, "Evaluation of Powers" of
592 Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer
593 Programming", 3rd Edition, 1998. */
595 /* This code is mostly duplicated from expand_powi in the backend.
596 We establish the "optimal power tree" lookup table with the defined size.
597 The items in the table are the exponents used to calculate the index
598 exponents. Any integer n less than the value can get an "addition chain",
599 with the first node being one. */
600 #define POWI_TABLE_SIZE 256
602 /* The table is from builtins.c. */
603 static const unsigned char powi_table[POWI_TABLE_SIZE] =
605 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */
606 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */
607 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */
608 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */
609 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */
610 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */
611 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */
612 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */
613 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */
614 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */
615 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */
616 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */
617 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */
618 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */
619 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */
620 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */
621 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */
622 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */
623 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */
624 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */
625 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */
626 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */
627 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */
628 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */
629 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */
630 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */
631 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */
632 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */
633 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */
634 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */
635 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */
636 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */
639 /* If n is larger than lookup table's max index, we use the "window
641 #define POWI_WINDOW_SIZE 3
643 /* Recursive function to expand the power operator. The temporary
644 values are put in tmpvar. The function returns tmpvar[1] ** n. */
646 gfc_conv_powi (gfc_se * se, unsigned HOST_WIDE_INT n, tree * tmpvar)
653 if (n < POWI_TABLE_SIZE)
658 op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar);
659 op1 = gfc_conv_powi (se, powi_table[n], tmpvar);
663 digit = n & ((1 << POWI_WINDOW_SIZE) - 1);
664 op0 = gfc_conv_powi (se, n - digit, tmpvar);
665 op1 = gfc_conv_powi (se, digit, tmpvar);
669 op0 = gfc_conv_powi (se, n >> 1, tmpvar);
673 tmp = fold_build2 (MULT_EXPR, TREE_TYPE (op0), op0, op1);
674 tmp = gfc_evaluate_now (tmp, &se->pre);
676 if (n < POWI_TABLE_SIZE)
683 /* Expand lhs ** rhs. rhs is a constant integer. If it expands successfully,
684 return 1. Else return 0 and a call to runtime library functions
685 will have to be built. */
687 gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs)
692 tree vartmp[POWI_TABLE_SIZE];
694 unsigned HOST_WIDE_INT n;
697 /* If exponent is too large, we won't expand it anyway, so don't bother
698 with large integer values. */
699 if (!double_int_fits_in_shwi_p (TREE_INT_CST (rhs)))
702 m = double_int_to_shwi (TREE_INT_CST (rhs));
703 /* There's no ABS for HOST_WIDE_INT, so here we go. It also takes care
704 of the asymmetric range of the integer type. */
705 n = (unsigned HOST_WIDE_INT) (m < 0 ? -m : m);
707 type = TREE_TYPE (lhs);
708 sgn = tree_int_cst_sgn (rhs);
710 if (((FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations)
711 || optimize_size) && (m > 2 || m < -1))
717 se->expr = gfc_build_const (type, integer_one_node);
721 /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */
722 if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE))
724 tmp = build2 (EQ_EXPR, boolean_type_node, lhs,
725 build_int_cst (TREE_TYPE (lhs), -1));
726 cond = build2 (EQ_EXPR, boolean_type_node, lhs,
727 build_int_cst (TREE_TYPE (lhs), 1));
730 result = (lhs == 1 || lhs == -1) ? 1 : 0. */
733 tmp = build2 (TRUTH_OR_EXPR, boolean_type_node, tmp, cond);
734 se->expr = build3 (COND_EXPR, type, tmp, build_int_cst (type, 1),
735 build_int_cst (type, 0));
739 result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */
740 tmp = build3 (COND_EXPR, type, tmp, build_int_cst (type, -1),
741 build_int_cst (type, 0));
742 se->expr = build3 (COND_EXPR, type, cond, build_int_cst (type, 1), tmp);
746 memset (vartmp, 0, sizeof (vartmp));
750 tmp = gfc_build_const (type, integer_one_node);
751 vartmp[1] = build2 (RDIV_EXPR, type, tmp, vartmp[1]);
754 se->expr = gfc_conv_powi (se, n, vartmp);
760 /* Power op (**). Constant integer exponent has special handling. */
763 gfc_conv_power_op (gfc_se * se, gfc_expr * expr)
765 tree gfc_int4_type_node;
772 gfc_init_se (&lse, se);
773 gfc_conv_expr_val (&lse, expr->value.op.op1);
774 lse.expr = gfc_evaluate_now (lse.expr, &lse.pre);
775 gfc_add_block_to_block (&se->pre, &lse.pre);
777 gfc_init_se (&rse, se);
778 gfc_conv_expr_val (&rse, expr->value.op.op2);
779 gfc_add_block_to_block (&se->pre, &rse.pre);
781 if (expr->value.op.op2->ts.type == BT_INTEGER
782 && expr->value.op.op2->expr_type == EXPR_CONSTANT)
783 if (gfc_conv_cst_int_power (se, lse.expr, rse.expr))
786 gfc_int4_type_node = gfc_get_int_type (4);
788 kind = expr->value.op.op1->ts.kind;
789 switch (expr->value.op.op2->ts.type)
792 ikind = expr->value.op.op2->ts.kind;
797 rse.expr = convert (gfc_int4_type_node, rse.expr);
819 if (expr->value.op.op1->ts.type == BT_INTEGER)
820 lse.expr = convert (gfc_int4_type_node, lse.expr);
845 switch (expr->value.op.op1->ts.type)
848 if (kind == 3) /* Case 16 was not handled properly above. */
850 fndecl = gfor_fndecl_math_powi[kind][ikind].integer;
854 /* Use builtins for real ** int4. */
860 fndecl = built_in_decls[BUILT_IN_POWIF];
864 fndecl = built_in_decls[BUILT_IN_POWI];
869 fndecl = built_in_decls[BUILT_IN_POWIL];
877 fndecl = gfor_fndecl_math_powi[kind][ikind].real;
881 fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx;
893 fndecl = built_in_decls[BUILT_IN_POWF];
896 fndecl = built_in_decls[BUILT_IN_POW];
900 fndecl = built_in_decls[BUILT_IN_POWL];
911 fndecl = gfor_fndecl_math_cpowf;
914 fndecl = gfor_fndecl_math_cpow;
917 fndecl = gfor_fndecl_math_cpowl10;
920 fndecl = gfor_fndecl_math_cpowl16;
932 se->expr = build_call_expr (fndecl, 2, lse.expr, rse.expr);
936 /* Generate code to allocate a string temporary. */
939 gfc_conv_string_tmp (gfc_se * se, tree type, tree len)
944 gcc_assert (TREE_TYPE (len) == gfc_charlen_type_node);
946 if (gfc_can_put_var_on_stack (len))
948 /* Create a temporary variable to hold the result. */
949 tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len,
950 build_int_cst (gfc_charlen_type_node, 1));
951 tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp);
952 tmp = build_array_type (gfc_character1_type_node, tmp);
953 var = gfc_create_var (tmp, "str");
954 var = gfc_build_addr_expr (type, var);
958 /* Allocate a temporary to hold the result. */
959 var = gfc_create_var (type, "pstr");
960 tmp = gfc_call_malloc (&se->pre, type, len);
961 gfc_add_modify_expr (&se->pre, var, tmp);
963 /* Free the temporary afterwards. */
964 tmp = gfc_call_free (convert (pvoid_type_node, var));
965 gfc_add_expr_to_block (&se->post, tmp);
972 /* Handle a string concatenation operation. A temporary will be allocated to
976 gfc_conv_concat_op (gfc_se * se, gfc_expr * expr)
985 gcc_assert (expr->value.op.op1->ts.type == BT_CHARACTER
986 && expr->value.op.op2->ts.type == BT_CHARACTER);
988 gfc_init_se (&lse, se);
989 gfc_conv_expr (&lse, expr->value.op.op1);
990 gfc_conv_string_parameter (&lse);
991 gfc_init_se (&rse, se);
992 gfc_conv_expr (&rse, expr->value.op.op2);
993 gfc_conv_string_parameter (&rse);
995 gfc_add_block_to_block (&se->pre, &lse.pre);
996 gfc_add_block_to_block (&se->pre, &rse.pre);
998 type = gfc_get_character_type (expr->ts.kind, expr->ts.cl);
999 len = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
1000 if (len == NULL_TREE)
1002 len = fold_build2 (PLUS_EXPR, TREE_TYPE (lse.string_length),
1003 lse.string_length, rse.string_length);
1006 type = build_pointer_type (type);
1008 var = gfc_conv_string_tmp (se, type, len);
1010 /* Do the actual concatenation. */
1011 tmp = build_call_expr (gfor_fndecl_concat_string, 6,
1013 lse.string_length, lse.expr,
1014 rse.string_length, rse.expr);
1015 gfc_add_expr_to_block (&se->pre, tmp);
1017 /* Add the cleanup for the operands. */
1018 gfc_add_block_to_block (&se->pre, &rse.post);
1019 gfc_add_block_to_block (&se->pre, &lse.post);
1022 se->string_length = len;
1025 /* Translates an op expression. Common (binary) cases are handled by this
1026 function, others are passed on. Recursion is used in either case.
1027 We use the fact that (op1.ts == op2.ts) (except for the power
1029 Operators need no special handling for scalarized expressions as long as
1030 they call gfc_conv_simple_val to get their operands.
1031 Character strings get special handling. */
1034 gfc_conv_expr_op (gfc_se * se, gfc_expr * expr)
1036 enum tree_code code;
1045 switch (expr->value.op.operator)
1047 case INTRINSIC_UPLUS:
1048 case INTRINSIC_PARENTHESES:
1049 gfc_conv_expr (se, expr->value.op.op1);
1052 case INTRINSIC_UMINUS:
1053 gfc_conv_unary_op (NEGATE_EXPR, se, expr);
1057 gfc_conv_unary_op (TRUTH_NOT_EXPR, se, expr);
1060 case INTRINSIC_PLUS:
1064 case INTRINSIC_MINUS:
1068 case INTRINSIC_TIMES:
1072 case INTRINSIC_DIVIDE:
1073 /* If expr is a real or complex expr, use an RDIV_EXPR. If op1 is
1074 an integer, we must round towards zero, so we use a
1076 if (expr->ts.type == BT_INTEGER)
1077 code = TRUNC_DIV_EXPR;
1082 case INTRINSIC_POWER:
1083 gfc_conv_power_op (se, expr);
1086 case INTRINSIC_CONCAT:
1087 gfc_conv_concat_op (se, expr);
1091 code = TRUTH_ANDIF_EXPR;
1096 code = TRUTH_ORIF_EXPR;
1100 /* EQV and NEQV only work on logicals, but since we represent them
1101 as integers, we can use EQ_EXPR and NE_EXPR for them in GIMPLE. */
1103 case INTRINSIC_EQ_OS:
1111 case INTRINSIC_NE_OS:
1112 case INTRINSIC_NEQV:
1119 case INTRINSIC_GT_OS:
1126 case INTRINSIC_GE_OS:
1133 case INTRINSIC_LT_OS:
1140 case INTRINSIC_LE_OS:
1146 case INTRINSIC_USER:
1147 case INTRINSIC_ASSIGN:
1148 /* These should be converted into function calls by the frontend. */
1152 fatal_error ("Unknown intrinsic op");
1156 /* The only exception to this is **, which is handled separately anyway. */
1157 gcc_assert (expr->value.op.op1->ts.type == expr->value.op.op2->ts.type);
1159 if (checkstring && expr->value.op.op1->ts.type != BT_CHARACTER)
1163 gfc_init_se (&lse, se);
1164 gfc_conv_expr (&lse, expr->value.op.op1);
1165 gfc_add_block_to_block (&se->pre, &lse.pre);
1168 gfc_init_se (&rse, se);
1169 gfc_conv_expr (&rse, expr->value.op.op2);
1170 gfc_add_block_to_block (&se->pre, &rse.pre);
1174 gfc_conv_string_parameter (&lse);
1175 gfc_conv_string_parameter (&rse);
1177 lse.expr = gfc_build_compare_string (lse.string_length, lse.expr,
1178 rse.string_length, rse.expr);
1179 rse.expr = build_int_cst (TREE_TYPE (lse.expr), 0);
1180 gfc_add_block_to_block (&lse.post, &rse.post);
1183 type = gfc_typenode_for_spec (&expr->ts);
1187 /* The result of logical ops is always boolean_type_node. */
1188 tmp = fold_build2 (code, boolean_type_node, lse.expr, rse.expr);
1189 se->expr = convert (type, tmp);
1192 se->expr = fold_build2 (code, type, lse.expr, rse.expr);
1194 /* Add the post blocks. */
1195 gfc_add_block_to_block (&se->post, &rse.post);
1196 gfc_add_block_to_block (&se->post, &lse.post);
1199 /* If a string's length is one, we convert it to a single character. */
1202 gfc_to_single_character (tree len, tree str)
1204 gcc_assert (POINTER_TYPE_P (TREE_TYPE (str)));
1206 if (INTEGER_CST_P (len) && TREE_INT_CST_LOW (len) == 1
1207 && TREE_INT_CST_HIGH (len) == 0)
1209 str = fold_convert (pchar_type_node, str);
1210 return build_fold_indirect_ref (str);
1218 gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr)
1221 if (sym->backend_decl)
1223 /* This becomes the nominal_type in
1224 function.c:assign_parm_find_data_types. */
1225 TREE_TYPE (sym->backend_decl) = unsigned_char_type_node;
1226 /* This becomes the passed_type in
1227 function.c:assign_parm_find_data_types. C promotes char to
1228 integer for argument passing. */
1229 DECL_ARG_TYPE (sym->backend_decl) = unsigned_type_node;
1231 DECL_BY_REFERENCE (sym->backend_decl) = 0;
1236 /* If we have a constant character expression, make it into an
1238 if ((*expr)->expr_type == EXPR_CONSTANT)
1242 *expr = gfc_int_expr ((int)(*expr)->value.character.string[0]);
1243 if ((*expr)->ts.kind != gfc_c_int_kind)
1245 /* The expr needs to be compatible with a C int. If the
1246 conversion fails, then the 2 causes an ICE. */
1247 ts.type = BT_INTEGER;
1248 ts.kind = gfc_c_int_kind;
1249 gfc_convert_type (*expr, &ts, 2);
1252 else if (se != NULL && (*expr)->expr_type == EXPR_VARIABLE)
1254 if ((*expr)->ref == NULL)
1256 se->expr = gfc_to_single_character
1257 (build_int_cst (integer_type_node, 1),
1258 gfc_build_addr_expr (pchar_type_node,
1260 ((*expr)->symtree->n.sym)));
1264 gfc_conv_variable (se, *expr);
1265 se->expr = gfc_to_single_character
1266 (build_int_cst (integer_type_node, 1),
1267 gfc_build_addr_expr (pchar_type_node, se->expr));
1274 /* Compare two strings. If they are all single characters, the result is the
1275 subtraction of them. Otherwise, we build a library call. */
1278 gfc_build_compare_string (tree len1, tree str1, tree len2, tree str2)
1284 gcc_assert (POINTER_TYPE_P (TREE_TYPE (str1)));
1285 gcc_assert (POINTER_TYPE_P (TREE_TYPE (str2)));
1287 sc1 = gfc_to_single_character (len1, str1);
1288 sc2 = gfc_to_single_character (len2, str2);
1290 /* Deal with single character specially. */
1291 if (sc1 != NULL_TREE && sc2 != NULL_TREE)
1293 sc1 = fold_convert (integer_type_node, sc1);
1294 sc2 = fold_convert (integer_type_node, sc2);
1295 tmp = fold_build2 (MINUS_EXPR, integer_type_node, sc1, sc2);
1298 /* Build a call for the comparison. */
1299 tmp = build_call_expr (gfor_fndecl_compare_string, 4,
1300 len1, str1, len2, str2);
1305 gfc_conv_function_val (gfc_se * se, gfc_symbol * sym)
1309 if (sym->attr.dummy)
1311 tmp = gfc_get_symbol_decl (sym);
1312 gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE
1313 && TREE_CODE (TREE_TYPE (TREE_TYPE (tmp))) == FUNCTION_TYPE);
1317 if (!sym->backend_decl)
1318 sym->backend_decl = gfc_get_extern_function_decl (sym);
1320 tmp = sym->backend_decl;
1321 if (sym->attr.cray_pointee)
1322 tmp = convert (build_pointer_type (TREE_TYPE (tmp)),
1323 gfc_get_symbol_decl (sym->cp_pointer));
1324 if (!POINTER_TYPE_P (TREE_TYPE (tmp)))
1326 gcc_assert (TREE_CODE (tmp) == FUNCTION_DECL);
1327 tmp = build_fold_addr_expr (tmp);
1334 /* Translate the call for an elemental subroutine call used in an operator
1335 assignment. This is a simplified version of gfc_conv_function_call. */
1338 gfc_conv_operator_assign (gfc_se *lse, gfc_se *rse, gfc_symbol *sym)
1345 /* Only elemental subroutines with two arguments. */
1346 gcc_assert (sym->attr.elemental && sym->attr.subroutine);
1347 gcc_assert (sym->formal->next->next == NULL);
1349 gfc_init_block (&block);
1351 gfc_add_block_to_block (&block, &lse->pre);
1352 gfc_add_block_to_block (&block, &rse->pre);
1354 /* Build the argument list for the call, including hidden string lengths. */
1355 args = gfc_chainon_list (NULL_TREE, build_fold_addr_expr (lse->expr));
1356 args = gfc_chainon_list (args, build_fold_addr_expr (rse->expr));
1357 if (lse->string_length != NULL_TREE)
1358 args = gfc_chainon_list (args, lse->string_length);
1359 if (rse->string_length != NULL_TREE)
1360 args = gfc_chainon_list (args, rse->string_length);
1362 /* Build the function call. */
1363 gfc_init_se (&se, NULL);
1364 gfc_conv_function_val (&se, sym);
1365 tmp = TREE_TYPE (TREE_TYPE (TREE_TYPE (se.expr)));
1366 tmp = build_call_list (tmp, se.expr, args);
1367 gfc_add_expr_to_block (&block, tmp);
1369 gfc_add_block_to_block (&block, &lse->post);
1370 gfc_add_block_to_block (&block, &rse->post);
1372 return gfc_finish_block (&block);
1376 /* Initialize MAPPING. */
1379 gfc_init_interface_mapping (gfc_interface_mapping * mapping)
1381 mapping->syms = NULL;
1382 mapping->charlens = NULL;
1386 /* Free all memory held by MAPPING (but not MAPPING itself). */
1389 gfc_free_interface_mapping (gfc_interface_mapping * mapping)
1391 gfc_interface_sym_mapping *sym;
1392 gfc_interface_sym_mapping *nextsym;
1394 gfc_charlen *nextcl;
1396 for (sym = mapping->syms; sym; sym = nextsym)
1398 nextsym = sym->next;
1399 gfc_free_symbol (sym->new->n.sym);
1400 gfc_free (sym->new);
1403 for (cl = mapping->charlens; cl; cl = nextcl)
1406 gfc_free_expr (cl->length);
1412 /* Return a copy of gfc_charlen CL. Add the returned structure to
1413 MAPPING so that it will be freed by gfc_free_interface_mapping. */
1415 static gfc_charlen *
1416 gfc_get_interface_mapping_charlen (gfc_interface_mapping * mapping,
1421 new = gfc_get_charlen ();
1422 new->next = mapping->charlens;
1423 new->length = gfc_copy_expr (cl->length);
1425 mapping->charlens = new;
1430 /* A subroutine of gfc_add_interface_mapping. Return a descriptorless
1431 array variable that can be used as the actual argument for dummy
1432 argument SYM. Add any initialization code to BLOCK. PACKED is as
1433 for gfc_get_nodesc_array_type and DATA points to the first element
1434 in the passed array. */
1437 gfc_get_interface_mapping_array (stmtblock_t * block, gfc_symbol * sym,
1438 gfc_packed packed, tree data)
1443 type = gfc_typenode_for_spec (&sym->ts);
1444 type = gfc_get_nodesc_array_type (type, sym->as, packed);
1446 var = gfc_create_var (type, "ifm");
1447 gfc_add_modify_expr (block, var, fold_convert (type, data));
1453 /* A subroutine of gfc_add_interface_mapping. Set the stride, upper bounds
1454 and offset of descriptorless array type TYPE given that it has the same
1455 size as DESC. Add any set-up code to BLOCK. */
1458 gfc_set_interface_mapping_bounds (stmtblock_t * block, tree type, tree desc)
1465 offset = gfc_index_zero_node;
1466 for (n = 0; n < GFC_TYPE_ARRAY_RANK (type); n++)
1468 dim = gfc_rank_cst[n];
1469 GFC_TYPE_ARRAY_STRIDE (type, n) = gfc_conv_array_stride (desc, n);
1470 if (GFC_TYPE_ARRAY_LBOUND (type, n) == NULL_TREE)
1472 GFC_TYPE_ARRAY_LBOUND (type, n)
1473 = gfc_conv_descriptor_lbound (desc, dim);
1474 GFC_TYPE_ARRAY_UBOUND (type, n)
1475 = gfc_conv_descriptor_ubound (desc, dim);
1477 else if (GFC_TYPE_ARRAY_UBOUND (type, n) == NULL_TREE)
1479 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type,
1480 gfc_conv_descriptor_ubound (desc, dim),
1481 gfc_conv_descriptor_lbound (desc, dim));
1482 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type,
1483 GFC_TYPE_ARRAY_LBOUND (type, n),
1485 tmp = gfc_evaluate_now (tmp, block);
1486 GFC_TYPE_ARRAY_UBOUND (type, n) = tmp;
1488 tmp = fold_build2 (MULT_EXPR, gfc_array_index_type,
1489 GFC_TYPE_ARRAY_LBOUND (type, n),
1490 GFC_TYPE_ARRAY_STRIDE (type, n));
1491 offset = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp);
1493 offset = gfc_evaluate_now (offset, block);
1494 GFC_TYPE_ARRAY_OFFSET (type) = offset;
1498 /* Extend MAPPING so that it maps dummy argument SYM to the value stored
1499 in SE. The caller may still use se->expr and se->string_length after
1500 calling this function. */
1503 gfc_add_interface_mapping (gfc_interface_mapping * mapping,
1504 gfc_symbol * sym, gfc_se * se)
1506 gfc_interface_sym_mapping *sm;
1510 gfc_symbol *new_sym;
1512 gfc_symtree *new_symtree;
1514 /* Create a new symbol to represent the actual argument. */
1515 new_sym = gfc_new_symbol (sym->name, NULL);
1516 new_sym->ts = sym->ts;
1517 new_sym->attr.referenced = 1;
1518 new_sym->attr.dimension = sym->attr.dimension;
1519 new_sym->attr.pointer = sym->attr.pointer;
1520 new_sym->attr.allocatable = sym->attr.allocatable;
1521 new_sym->attr.flavor = sym->attr.flavor;
1523 /* Create a fake symtree for it. */
1525 new_symtree = gfc_new_symtree (&root, sym->name);
1526 new_symtree->n.sym = new_sym;
1527 gcc_assert (new_symtree == root);
1529 /* Create a dummy->actual mapping. */
1530 sm = gfc_getmem (sizeof (*sm));
1531 sm->next = mapping->syms;
1533 sm->new = new_symtree;
1536 /* Stabilize the argument's value. */
1537 se->expr = gfc_evaluate_now (se->expr, &se->pre);
1539 if (sym->ts.type == BT_CHARACTER)
1541 /* Create a copy of the dummy argument's length. */
1542 new_sym->ts.cl = gfc_get_interface_mapping_charlen (mapping, sym->ts.cl);
1544 /* If the length is specified as "*", record the length that
1545 the caller is passing. We should use the callee's length
1546 in all other cases. */
1547 if (!new_sym->ts.cl->length)
1549 se->string_length = gfc_evaluate_now (se->string_length, &se->pre);
1550 new_sym->ts.cl->backend_decl = se->string_length;
1554 /* Use the passed value as-is if the argument is a function. */
1555 if (sym->attr.flavor == FL_PROCEDURE)
1558 /* If the argument is either a string or a pointer to a string,
1559 convert it to a boundless character type. */
1560 else if (!sym->attr.dimension && sym->ts.type == BT_CHARACTER)
1562 tmp = gfc_get_character_type_len (sym->ts.kind, NULL);
1563 tmp = build_pointer_type (tmp);
1564 if (sym->attr.pointer)
1565 value = build_fold_indirect_ref (se->expr);
1568 value = fold_convert (tmp, value);
1571 /* If the argument is a scalar, a pointer to an array or an allocatable,
1573 else if (!sym->attr.dimension || sym->attr.pointer || sym->attr.allocatable)
1574 value = build_fold_indirect_ref (se->expr);
1576 /* For character(*), use the actual argument's descriptor. */
1577 else if (sym->ts.type == BT_CHARACTER && !new_sym->ts.cl->length)
1578 value = build_fold_indirect_ref (se->expr);
1580 /* If the argument is an array descriptor, use it to determine
1581 information about the actual argument's shape. */
1582 else if (POINTER_TYPE_P (TREE_TYPE (se->expr))
1583 && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se->expr))))
1585 /* Get the actual argument's descriptor. */
1586 desc = build_fold_indirect_ref (se->expr);
1588 /* Create the replacement variable. */
1589 tmp = gfc_conv_descriptor_data_get (desc);
1590 value = gfc_get_interface_mapping_array (&se->pre, sym,
1593 /* Use DESC to work out the upper bounds, strides and offset. */
1594 gfc_set_interface_mapping_bounds (&se->pre, TREE_TYPE (value), desc);
1597 /* Otherwise we have a packed array. */
1598 value = gfc_get_interface_mapping_array (&se->pre, sym,
1599 PACKED_FULL, se->expr);
1601 new_sym->backend_decl = value;
1605 /* Called once all dummy argument mappings have been added to MAPPING,
1606 but before the mapping is used to evaluate expressions. Pre-evaluate
1607 the length of each argument, adding any initialization code to PRE and
1608 any finalization code to POST. */
1611 gfc_finish_interface_mapping (gfc_interface_mapping * mapping,
1612 stmtblock_t * pre, stmtblock_t * post)
1614 gfc_interface_sym_mapping *sym;
1618 for (sym = mapping->syms; sym; sym = sym->next)
1619 if (sym->new->n.sym->ts.type == BT_CHARACTER
1620 && !sym->new->n.sym->ts.cl->backend_decl)
1622 expr = sym->new->n.sym->ts.cl->length;
1623 gfc_apply_interface_mapping_to_expr (mapping, expr);
1624 gfc_init_se (&se, NULL);
1625 gfc_conv_expr (&se, expr);
1627 se.expr = gfc_evaluate_now (se.expr, &se.pre);
1628 gfc_add_block_to_block (pre, &se.pre);
1629 gfc_add_block_to_block (post, &se.post);
1631 sym->new->n.sym->ts.cl->backend_decl = se.expr;
1636 /* Like gfc_apply_interface_mapping_to_expr, but applied to
1640 gfc_apply_interface_mapping_to_cons (gfc_interface_mapping * mapping,
1641 gfc_constructor * c)
1643 for (; c; c = c->next)
1645 gfc_apply_interface_mapping_to_expr (mapping, c->expr);
1648 gfc_apply_interface_mapping_to_expr (mapping, c->iterator->start);
1649 gfc_apply_interface_mapping_to_expr (mapping, c->iterator->end);
1650 gfc_apply_interface_mapping_to_expr (mapping, c->iterator->step);
1656 /* Like gfc_apply_interface_mapping_to_expr, but applied to
1660 gfc_apply_interface_mapping_to_ref (gfc_interface_mapping * mapping,
1665 for (; ref; ref = ref->next)
1669 for (n = 0; n < ref->u.ar.dimen; n++)
1671 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.start[n]);
1672 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.end[n]);
1673 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.stride[n]);
1675 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.offset);
1682 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.start);
1683 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.end);
1689 /* EXPR is a copy of an expression that appeared in the interface
1690 associated with MAPPING. Walk it recursively looking for references to
1691 dummy arguments that MAPPING maps to actual arguments. Replace each such
1692 reference with a reference to the associated actual argument. */
1695 gfc_apply_interface_mapping_to_expr (gfc_interface_mapping * mapping,
1698 gfc_interface_sym_mapping *sym;
1699 gfc_actual_arglist *actual;
1700 int seen_result = 0;
1705 /* Copying an expression does not copy its length, so do that here. */
1706 if (expr->ts.type == BT_CHARACTER && expr->ts.cl)
1708 expr->ts.cl = gfc_get_interface_mapping_charlen (mapping, expr->ts.cl);
1709 gfc_apply_interface_mapping_to_expr (mapping, expr->ts.cl->length);
1712 /* Apply the mapping to any references. */
1713 gfc_apply_interface_mapping_to_ref (mapping, expr->ref);
1715 /* ...and to the expression's symbol, if it has one. */
1717 for (sym = mapping->syms; sym; sym = sym->next)
1718 if (sym->old == expr->symtree->n.sym)
1719 expr->symtree = sym->new;
1721 /* ...and to subexpressions in expr->value. */
1722 switch (expr->expr_type)
1725 if (expr->symtree->n.sym->attr.result)
1729 case EXPR_SUBSTRING:
1733 gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op1);
1734 gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op2);
1738 if (expr->value.function.esym == NULL
1739 && expr->value.function.isym != NULL
1740 && expr->value.function.isym->id == GFC_ISYM_LEN
1741 && expr->value.function.actual->expr->expr_type == EXPR_VARIABLE
1742 && gfc_apply_interface_mapping_to_expr (mapping,
1743 expr->value.function.actual->expr))
1746 new_expr = gfc_copy_expr (expr->value.function.actual->expr->ts.cl->length);
1748 gfc_free (new_expr);
1749 gfc_apply_interface_mapping_to_expr (mapping, expr);
1753 for (sym = mapping->syms; sym; sym = sym->next)
1754 if (sym->old == expr->value.function.esym)
1755 expr->value.function.esym = sym->new->n.sym;
1757 for (actual = expr->value.function.actual; actual; actual = actual->next)
1758 gfc_apply_interface_mapping_to_expr (mapping, actual->expr);
1762 case EXPR_STRUCTURE:
1763 gfc_apply_interface_mapping_to_cons (mapping, expr->value.constructor);
1770 /* Evaluate interface expression EXPR using MAPPING. Store the result
1774 gfc_apply_interface_mapping (gfc_interface_mapping * mapping,
1775 gfc_se * se, gfc_expr * expr)
1777 expr = gfc_copy_expr (expr);
1778 gfc_apply_interface_mapping_to_expr (mapping, expr);
1779 gfc_conv_expr (se, expr);
1780 se->expr = gfc_evaluate_now (se->expr, &se->pre);
1781 gfc_free_expr (expr);
1784 /* Returns a reference to a temporary array into which a component of
1785 an actual argument derived type array is copied and then returned
1786 after the function call.
1787 TODO Get rid of this kludge, when array descriptors are capable of
1788 handling arrays with a bigger stride in bytes than size. */
1791 gfc_conv_aliased_arg (gfc_se * parmse, gfc_expr * expr,
1792 int g77, sym_intent intent)
1808 gcc_assert (expr->expr_type == EXPR_VARIABLE);
1810 gfc_init_se (&lse, NULL);
1811 gfc_init_se (&rse, NULL);
1813 /* Walk the argument expression. */
1814 rss = gfc_walk_expr (expr);
1816 gcc_assert (rss != gfc_ss_terminator);
1818 /* Initialize the scalarizer. */
1819 gfc_init_loopinfo (&loop);
1820 gfc_add_ss_to_loop (&loop, rss);
1822 /* Calculate the bounds of the scalarization. */
1823 gfc_conv_ss_startstride (&loop);
1825 /* Build an ss for the temporary. */
1826 base_type = gfc_typenode_for_spec (&expr->ts);
1827 if (GFC_ARRAY_TYPE_P (base_type)
1828 || GFC_DESCRIPTOR_TYPE_P (base_type))
1829 base_type = gfc_get_element_type (base_type);
1831 loop.temp_ss = gfc_get_ss ();;
1832 loop.temp_ss->type = GFC_SS_TEMP;
1833 loop.temp_ss->data.temp.type = base_type;
1835 if (expr->ts.type == BT_CHARACTER)
1837 gfc_ref *char_ref = expr->ref;
1839 for (; char_ref; char_ref = char_ref->next)
1840 if (char_ref->type == REF_SUBSTRING)
1844 expr->ts.cl = gfc_get_charlen ();
1845 expr->ts.cl->next = char_ref->u.ss.length->next;
1846 char_ref->u.ss.length->next = expr->ts.cl;
1848 gfc_init_se (&tmp_se, NULL);
1849 gfc_conv_expr_type (&tmp_se, char_ref->u.ss.end,
1850 gfc_array_index_type);
1851 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type,
1852 tmp_se.expr, gfc_index_one_node);
1853 tmp = gfc_evaluate_now (tmp, &parmse->pre);
1854 gfc_init_se (&tmp_se, NULL);
1855 gfc_conv_expr_type (&tmp_se, char_ref->u.ss.start,
1856 gfc_array_index_type);
1857 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type,
1859 tmp = fold_convert (gfc_charlen_type_node, tmp);
1860 expr->ts.cl->backend_decl = tmp;
1864 loop.temp_ss->data.temp.type
1865 = gfc_typenode_for_spec (&expr->ts);
1866 loop.temp_ss->string_length = expr->ts.cl->backend_decl;
1869 loop.temp_ss->data.temp.dimen = loop.dimen;
1870 loop.temp_ss->next = gfc_ss_terminator;
1872 /* Associate the SS with the loop. */
1873 gfc_add_ss_to_loop (&loop, loop.temp_ss);
1875 /* Setup the scalarizing loops. */
1876 gfc_conv_loop_setup (&loop);
1878 /* Pass the temporary descriptor back to the caller. */
1879 info = &loop.temp_ss->data.info;
1880 parmse->expr = info->descriptor;
1882 /* Setup the gfc_se structures. */
1883 gfc_copy_loopinfo_to_se (&lse, &loop);
1884 gfc_copy_loopinfo_to_se (&rse, &loop);
1887 lse.ss = loop.temp_ss;
1888 gfc_mark_ss_chain_used (rss, 1);
1889 gfc_mark_ss_chain_used (loop.temp_ss, 1);
1891 /* Start the scalarized loop body. */
1892 gfc_start_scalarized_body (&loop, &body);
1894 /* Translate the expression. */
1895 gfc_conv_expr (&rse, expr);
1897 gfc_conv_tmp_array_ref (&lse);
1898 gfc_advance_se_ss_chain (&lse);
1900 if (intent != INTENT_OUT)
1902 tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, true, false);
1903 gfc_add_expr_to_block (&body, tmp);
1904 gcc_assert (rse.ss == gfc_ss_terminator);
1905 gfc_trans_scalarizing_loops (&loop, &body);
1909 /* Make sure that the temporary declaration survives by merging
1910 all the loop declarations into the current context. */
1911 for (n = 0; n < loop.dimen; n++)
1913 gfc_merge_block_scope (&body);
1914 body = loop.code[loop.order[n]];
1916 gfc_merge_block_scope (&body);
1919 /* Add the post block after the second loop, so that any
1920 freeing of allocated memory is done at the right time. */
1921 gfc_add_block_to_block (&parmse->pre, &loop.pre);
1923 /**********Copy the temporary back again.*********/
1925 gfc_init_se (&lse, NULL);
1926 gfc_init_se (&rse, NULL);
1928 /* Walk the argument expression. */
1929 lss = gfc_walk_expr (expr);
1930 rse.ss = loop.temp_ss;
1933 /* Initialize the scalarizer. */
1934 gfc_init_loopinfo (&loop2);
1935 gfc_add_ss_to_loop (&loop2, lss);
1937 /* Calculate the bounds of the scalarization. */
1938 gfc_conv_ss_startstride (&loop2);
1940 /* Setup the scalarizing loops. */
1941 gfc_conv_loop_setup (&loop2);
1943 gfc_copy_loopinfo_to_se (&lse, &loop2);
1944 gfc_copy_loopinfo_to_se (&rse, &loop2);
1946 gfc_mark_ss_chain_used (lss, 1);
1947 gfc_mark_ss_chain_used (loop.temp_ss, 1);
1949 /* Declare the variable to hold the temporary offset and start the
1950 scalarized loop body. */
1951 offset = gfc_create_var (gfc_array_index_type, NULL);
1952 gfc_start_scalarized_body (&loop2, &body);
1954 /* Build the offsets for the temporary from the loop variables. The
1955 temporary array has lbounds of zero and strides of one in all
1956 dimensions, so this is very simple. The offset is only computed
1957 outside the innermost loop, so the overall transfer could be
1958 optimized further. */
1959 info = &rse.ss->data.info;
1961 tmp_index = gfc_index_zero_node;
1962 for (n = info->dimen - 1; n > 0; n--)
1965 tmp = rse.loop->loopvar[n];
1966 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type,
1967 tmp, rse.loop->from[n]);
1968 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type,
1971 tmp_str = fold_build2 (MINUS_EXPR, gfc_array_index_type,
1972 rse.loop->to[n-1], rse.loop->from[n-1]);
1973 tmp_str = fold_build2 (PLUS_EXPR, gfc_array_index_type,
1974 tmp_str, gfc_index_one_node);
1976 tmp_index = fold_build2 (MULT_EXPR, gfc_array_index_type,
1980 tmp_index = fold_build2 (MINUS_EXPR, gfc_array_index_type,
1981 tmp_index, rse.loop->from[0]);
1982 gfc_add_modify_expr (&rse.loop->code[0], offset, tmp_index);
1984 tmp_index = fold_build2 (PLUS_EXPR, gfc_array_index_type,
1985 rse.loop->loopvar[0], offset);
1987 /* Now use the offset for the reference. */
1988 tmp = build_fold_indirect_ref (info->data);
1989 rse.expr = gfc_build_array_ref (tmp, tmp_index);
1991 if (expr->ts.type == BT_CHARACTER)
1992 rse.string_length = expr->ts.cl->backend_decl;
1994 gfc_conv_expr (&lse, expr);
1996 gcc_assert (lse.ss == gfc_ss_terminator);
1998 tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, false, false);
1999 gfc_add_expr_to_block (&body, tmp);
2001 /* Generate the copying loops. */
2002 gfc_trans_scalarizing_loops (&loop2, &body);
2004 /* Wrap the whole thing up by adding the second loop to the post-block
2005 and following it by the post-block of the first loop. In this way,
2006 if the temporary needs freeing, it is done after use! */
2007 if (intent != INTENT_IN)
2009 gfc_add_block_to_block (&parmse->post, &loop2.pre);
2010 gfc_add_block_to_block (&parmse->post, &loop2.post);
2013 gfc_add_block_to_block (&parmse->post, &loop.post);
2015 gfc_cleanup_loop (&loop);
2016 gfc_cleanup_loop (&loop2);
2018 /* Pass the string length to the argument expression. */
2019 if (expr->ts.type == BT_CHARACTER)
2020 parmse->string_length = expr->ts.cl->backend_decl;
2022 /* We want either the address for the data or the address of the descriptor,
2023 depending on the mode of passing array arguments. */
2025 parmse->expr = gfc_conv_descriptor_data_get (parmse->expr);
2027 parmse->expr = build_fold_addr_expr (parmse->expr);
2032 /* Is true if an array reference is followed by a component or substring
2036 is_aliased_array (gfc_expr * e)
2042 for (ref = e->ref; ref; ref = ref->next)
2044 if (ref->type == REF_ARRAY
2045 && ref->u.ar.type != AR_ELEMENT)
2049 && ref->type != REF_ARRAY)
2055 /* Generate the code for argument list functions. */
2058 conv_arglist_function (gfc_se *se, gfc_expr *expr, const char *name)
2060 /* Pass by value for g77 %VAL(arg), pass the address
2061 indirectly for %LOC, else by reference. Thus %REF
2062 is a "do-nothing" and %LOC is the same as an F95
2064 if (strncmp (name, "%VAL", 4) == 0)
2065 gfc_conv_expr (se, expr);
2066 else if (strncmp (name, "%LOC", 4) == 0)
2068 gfc_conv_expr_reference (se, expr);
2069 se->expr = gfc_build_addr_expr (NULL, se->expr);
2071 else if (strncmp (name, "%REF", 4) == 0)
2072 gfc_conv_expr_reference (se, expr);
2074 gfc_error ("Unknown argument list function at %L", &expr->where);
2078 /* Generate code for a procedure call. Note can return se->post != NULL.
2079 If se->direct_byref is set then se->expr contains the return parameter.
2080 Return nonzero, if the call has alternate specifiers. */
2083 gfc_conv_function_call (gfc_se * se, gfc_symbol * sym,
2084 gfc_actual_arglist * arg, tree append_args)
2086 gfc_interface_mapping mapping;
2100 gfc_formal_arglist *formal;
2101 int has_alternate_specifier = 0;
2102 bool need_interface_mapping;
2109 enum {MISSING = 0, ELEMENTAL, SCALAR, SCALAR_POINTER, ARRAY};
2111 arglist = NULL_TREE;
2112 retargs = NULL_TREE;
2113 stringargs = NULL_TREE;
2117 if (sym->from_intmod == INTMOD_ISO_C_BINDING)
2119 if (sym->intmod_sym_id == ISOCBINDING_LOC)
2121 if (arg->expr->rank == 0)
2122 gfc_conv_expr_reference (se, arg->expr);
2126 /* This is really the actual arg because no formal arglist is
2127 created for C_LOC. */
2128 fsym = arg->expr->symtree->n.sym;
2130 /* We should want it to do g77 calling convention. */
2132 && !(fsym->attr.pointer || fsym->attr.allocatable)
2133 && fsym->as->type != AS_ASSUMED_SHAPE;
2134 f = f || !sym->attr.always_explicit;
2136 argss = gfc_walk_expr (arg->expr);
2137 gfc_conv_array_parameter (se, arg->expr, argss, f);
2142 else if (sym->intmod_sym_id == ISOCBINDING_FUNLOC)
2144 arg->expr->ts.type = sym->ts.derived->ts.type;
2145 arg->expr->ts.f90_type = sym->ts.derived->ts.f90_type;
2146 arg->expr->ts.kind = sym->ts.derived->ts.kind;
2147 gfc_conv_expr_reference (se, arg->expr);
2155 if (!sym->attr.elemental)
2157 gcc_assert (se->ss->type == GFC_SS_FUNCTION);
2158 if (se->ss->useflags)
2160 gcc_assert (gfc_return_by_reference (sym)
2161 && sym->result->attr.dimension);
2162 gcc_assert (se->loop != NULL);
2164 /* Access the previously obtained result. */
2165 gfc_conv_tmp_array_ref (se);
2166 gfc_advance_se_ss_chain (se);
2170 info = &se->ss->data.info;
2175 gfc_init_block (&post);
2176 gfc_init_interface_mapping (&mapping);
2177 need_interface_mapping = ((sym->ts.type == BT_CHARACTER
2178 && sym->ts.cl->length
2179 && sym->ts.cl->length->expr_type
2181 || sym->attr.dimension);
2182 formal = sym->formal;
2183 /* Evaluate the arguments. */
2184 for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL)
2187 fsym = formal ? formal->sym : NULL;
2188 parm_kind = MISSING;
2192 if (se->ignore_optional)
2194 /* Some intrinsics have already been resolved to the correct
2198 else if (arg->label)
2200 has_alternate_specifier = 1;
2205 /* Pass a NULL pointer for an absent arg. */
2206 gfc_init_se (&parmse, NULL);
2207 parmse.expr = null_pointer_node;
2208 if (arg->missing_arg_type == BT_CHARACTER)
2209 parmse.string_length = build_int_cst (gfc_charlen_type_node, 0);
2212 else if (se->ss && se->ss->useflags)
2214 /* An elemental function inside a scalarized loop. */
2215 gfc_init_se (&parmse, se);
2216 gfc_conv_expr_reference (&parmse, e);
2217 parm_kind = ELEMENTAL;
2221 /* A scalar or transformational function. */
2222 gfc_init_se (&parmse, NULL);
2223 argss = gfc_walk_expr (e);
2225 if (argss == gfc_ss_terminator)
2227 if (fsym && fsym->attr.value)
2229 if (fsym->ts.type == BT_CHARACTER
2230 && fsym->ts.is_c_interop
2231 && fsym->ns->proc_name != NULL
2232 && fsym->ns->proc_name->attr.is_bind_c)
2235 gfc_conv_scalar_char_value (fsym, &parmse, &e);
2236 if (parmse.expr == NULL)
2237 gfc_conv_expr (&parmse, e);
2240 gfc_conv_expr (&parmse, e);
2242 else if (arg->name && arg->name[0] == '%')
2243 /* Argument list functions %VAL, %LOC and %REF are signalled
2244 through arg->name. */
2245 conv_arglist_function (&parmse, arg->expr, arg->name);
2246 else if ((e->expr_type == EXPR_FUNCTION)
2247 && e->symtree->n.sym->attr.pointer
2248 && fsym && fsym->attr.target)
2250 gfc_conv_expr (&parmse, e);
2251 parmse.expr = build_fold_addr_expr (parmse.expr);
2255 gfc_conv_expr_reference (&parmse, e);
2256 if (fsym && fsym->attr.pointer
2257 && fsym->attr.flavor != FL_PROCEDURE
2258 && e->expr_type != EXPR_NULL)
2260 /* Scalar pointer dummy args require an extra level of
2261 indirection. The null pointer already contains
2262 this level of indirection. */
2263 parm_kind = SCALAR_POINTER;
2264 parmse.expr = build_fold_addr_expr (parmse.expr);
2270 /* If the procedure requires an explicit interface, the actual
2271 argument is passed according to the corresponding formal
2272 argument. If the corresponding formal argument is a POINTER,
2273 ALLOCATABLE or assumed shape, we do not use g77's calling
2274 convention, and pass the address of the array descriptor
2275 instead. Otherwise we use g77's calling convention. */
2278 && !(fsym->attr.pointer || fsym->attr.allocatable)
2279 && fsym->as->type != AS_ASSUMED_SHAPE;
2280 f = f || !sym->attr.always_explicit;
2282 if (e->expr_type == EXPR_VARIABLE
2283 && is_aliased_array (e))
2284 /* The actual argument is a component reference to an
2285 array of derived types. In this case, the argument
2286 is converted to a temporary, which is passed and then
2287 written back after the procedure call. */
2288 gfc_conv_aliased_arg (&parmse, e, f,
2289 fsym ? fsym->attr.intent : INTENT_INOUT);
2291 gfc_conv_array_parameter (&parmse, e, argss, f);
2293 /* If an ALLOCATABLE dummy argument has INTENT(OUT) and is
2294 allocated on entry, it must be deallocated. */
2295 if (fsym && fsym->attr.allocatable
2296 && fsym->attr.intent == INTENT_OUT)
2298 tmp = build_fold_indirect_ref (parmse.expr);
2299 tmp = gfc_trans_dealloc_allocated (tmp);
2300 gfc_add_expr_to_block (&se->pre, tmp);
2306 /* The case with fsym->attr.optional is that of a user subroutine
2307 with an interface indicating an optional argument. When we call
2308 an intrinsic subroutine, however, fsym is NULL, but we might still
2309 have an optional argument, so we proceed to the substitution
2311 if (e && (fsym == NULL || fsym->attr.optional))
2313 /* If an optional argument is itself an optional dummy argument,
2314 check its presence and substitute a null if absent. */
2315 if (e->expr_type == EXPR_VARIABLE
2316 && e->symtree->n.sym->attr.optional)
2317 gfc_conv_missing_dummy (&parmse, e, fsym ? fsym->ts : e->ts);
2322 /* Obtain the character length of an assumed character length
2323 length procedure from the typespec. */
2324 if (fsym->ts.type == BT_CHARACTER
2325 && parmse.string_length == NULL_TREE
2326 && e->ts.type == BT_PROCEDURE
2327 && e->symtree->n.sym->ts.type == BT_CHARACTER
2328 && e->symtree->n.sym->ts.cl->length != NULL)
2330 gfc_conv_const_charlen (e->symtree->n.sym->ts.cl);
2331 parmse.string_length = e->symtree->n.sym->ts.cl->backend_decl;
2335 if (fsym && need_interface_mapping)
2336 gfc_add_interface_mapping (&mapping, fsym, &parmse);
2338 gfc_add_block_to_block (&se->pre, &parmse.pre);
2339 gfc_add_block_to_block (&post, &parmse.post);
2341 /* Allocated allocatable components of derived types must be
2342 deallocated for INTENT(OUT) dummy arguments and non-variable
2343 scalars. Non-variable arrays are dealt with in trans-array.c
2344 (gfc_conv_array_parameter). */
2345 if (e && e->ts.type == BT_DERIVED
2346 && e->ts.derived->attr.alloc_comp
2347 && ((formal && formal->sym->attr.intent == INTENT_OUT)
2349 (e->expr_type != EXPR_VARIABLE && !e->rank)))
2352 tmp = build_fold_indirect_ref (parmse.expr);
2353 parm_rank = e->rank;
2361 case (SCALAR_POINTER):
2362 tmp = build_fold_indirect_ref (tmp);
2369 tmp = gfc_deallocate_alloc_comp (e->ts.derived, tmp, parm_rank);
2370 if (e->expr_type == EXPR_VARIABLE && e->symtree->n.sym->attr.optional)
2371 tmp = build3_v (COND_EXPR, gfc_conv_expr_present (e->symtree->n.sym),
2372 tmp, build_empty_stmt ());
2374 if (e->expr_type != EXPR_VARIABLE)
2375 /* Don't deallocate non-variables until they have been used. */
2376 gfc_add_expr_to_block (&se->post, tmp);
2379 gcc_assert (formal && formal->sym->attr.intent == INTENT_OUT);
2380 gfc_add_expr_to_block (&se->pre, tmp);
2384 /* Character strings are passed as two parameters, a length and a
2386 if (parmse.string_length != NULL_TREE)
2387 stringargs = gfc_chainon_list (stringargs, parmse.string_length);
2389 arglist = gfc_chainon_list (arglist, parmse.expr);
2391 gfc_finish_interface_mapping (&mapping, &se->pre, &se->post);
2394 if (ts.type == BT_CHARACTER)
2396 if (sym->ts.cl->length == NULL)
2398 /* Assumed character length results are not allowed by 5.1.1.5 of the
2399 standard and are trapped in resolve.c; except in the case of SPREAD
2400 (and other intrinsics?) and dummy functions. In the case of SPREAD,
2401 we take the character length of the first argument for the result.
2402 For dummies, we have to look through the formal argument list for
2403 this function and use the character length found there.*/
2404 if (!sym->attr.dummy)
2405 cl.backend_decl = TREE_VALUE (stringargs);
2408 formal = sym->ns->proc_name->formal;
2409 for (; formal; formal = formal->next)
2410 if (strcmp (formal->sym->name, sym->name) == 0)
2411 cl.backend_decl = formal->sym->ts.cl->backend_decl;
2418 /* Calculate the length of the returned string. */
2419 gfc_init_se (&parmse, NULL);
2420 if (need_interface_mapping)
2421 gfc_apply_interface_mapping (&mapping, &parmse, sym->ts.cl->length);
2423 gfc_conv_expr (&parmse, sym->ts.cl->length);
2424 gfc_add_block_to_block (&se->pre, &parmse.pre);
2425 gfc_add_block_to_block (&se->post, &parmse.post);
2427 tmp = fold_convert (gfc_charlen_type_node, parmse.expr);
2428 tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp,
2429 build_int_cst (gfc_charlen_type_node, 0));
2430 cl.backend_decl = tmp;
2433 /* Set up a charlen structure for it. */
2438 len = cl.backend_decl;
2441 byref = gfc_return_by_reference (sym);
2444 if (se->direct_byref)
2446 /* Sometimes, too much indirection can be applied; eg. for
2447 function_result = array_valued_recursive_function. */
2448 if (TREE_TYPE (TREE_TYPE (se->expr))
2449 && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr)))
2450 && GFC_DESCRIPTOR_TYPE_P
2451 (TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr)))))
2452 se->expr = build_fold_indirect_ref (se->expr);
2454 retargs = gfc_chainon_list (retargs, se->expr);
2456 else if (sym->result->attr.dimension)
2458 gcc_assert (se->loop && info);
2460 /* Set the type of the array. */
2461 tmp = gfc_typenode_for_spec (&ts);
2462 info->dimen = se->loop->dimen;
2464 /* Evaluate the bounds of the result, if known. */
2465 gfc_set_loop_bounds_from_array_spec (&mapping, se, sym->result->as);
2467 /* Create a temporary to store the result. In case the function
2468 returns a pointer, the temporary will be a shallow copy and
2469 mustn't be deallocated. */
2470 callee_alloc = sym->attr.allocatable || sym->attr.pointer;
2471 gfc_trans_create_temp_array (&se->pre, &se->post, se->loop, info, tmp,
2472 false, !sym->attr.pointer, callee_alloc);
2474 /* Pass the temporary as the first argument. */
2475 tmp = info->descriptor;
2476 tmp = build_fold_addr_expr (tmp);
2477 retargs = gfc_chainon_list (retargs, tmp);
2479 else if (ts.type == BT_CHARACTER)
2481 /* Pass the string length. */
2482 type = gfc_get_character_type (ts.kind, ts.cl);
2483 type = build_pointer_type (type);
2485 /* Return an address to a char[0:len-1]* temporary for
2486 character pointers. */
2487 if (sym->attr.pointer || sym->attr.allocatable)
2489 /* Build char[0:len-1] * pstr. */
2490 tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len,
2491 build_int_cst (gfc_charlen_type_node, 1));
2492 tmp = build_range_type (gfc_array_index_type,
2493 gfc_index_zero_node, tmp);
2494 tmp = build_array_type (gfc_character1_type_node, tmp);
2495 var = gfc_create_var (build_pointer_type (tmp), "pstr");
2497 /* Provide an address expression for the function arguments. */
2498 var = build_fold_addr_expr (var);
2501 var = gfc_conv_string_tmp (se, type, len);
2503 retargs = gfc_chainon_list (retargs, var);
2507 gcc_assert (gfc_option.flag_f2c && ts.type == BT_COMPLEX);
2509 type = gfc_get_complex_type (ts.kind);
2510 var = build_fold_addr_expr (gfc_create_var (type, "cmplx"));
2511 retargs = gfc_chainon_list (retargs, var);
2514 /* Add the string length to the argument list. */
2515 if (ts.type == BT_CHARACTER)
2516 retargs = gfc_chainon_list (retargs, len);
2518 gfc_free_interface_mapping (&mapping);
2520 /* Add the return arguments. */
2521 arglist = chainon (retargs, arglist);
2523 /* Add the hidden string length parameters to the arguments. */
2524 arglist = chainon (arglist, stringargs);
2526 /* We may want to append extra arguments here. This is used e.g. for
2527 calls to libgfortran_matmul_??, which need extra information. */
2528 if (append_args != NULL_TREE)
2529 arglist = chainon (arglist, append_args);
2531 /* Generate the actual call. */
2532 gfc_conv_function_val (se, sym);
2534 /* If there are alternate return labels, function type should be
2535 integer. Can't modify the type in place though, since it can be shared
2536 with other functions. For dummy arguments, the typing is done to
2537 to this result, even if it has to be repeated for each call. */
2538 if (has_alternate_specifier
2539 && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) != integer_type_node)
2541 if (!sym->attr.dummy)
2543 TREE_TYPE (sym->backend_decl)
2544 = build_function_type (integer_type_node,
2545 TYPE_ARG_TYPES (TREE_TYPE (sym->backend_decl)));
2546 se->expr = build_fold_addr_expr (sym->backend_decl);
2549 TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) = integer_type_node;
2552 fntype = TREE_TYPE (TREE_TYPE (se->expr));
2553 se->expr = build_call_list (TREE_TYPE (fntype), se->expr, arglist);
2555 /* If we have a pointer function, but we don't want a pointer, e.g.
2558 where f is pointer valued, we have to dereference the result. */
2559 if (!se->want_pointer && !byref && sym->attr.pointer)
2560 se->expr = build_fold_indirect_ref (se->expr);
2562 /* f2c calling conventions require a scalar default real function to
2563 return a double precision result. Convert this back to default
2564 real. We only care about the cases that can happen in Fortran 77.
2566 if (gfc_option.flag_f2c && sym->ts.type == BT_REAL
2567 && sym->ts.kind == gfc_default_real_kind
2568 && !sym->attr.always_explicit)
2569 se->expr = fold_convert (gfc_get_real_type (sym->ts.kind), se->expr);
2571 /* A pure function may still have side-effects - it may modify its
2573 TREE_SIDE_EFFECTS (se->expr) = 1;
2575 if (!sym->attr.pure)
2576 TREE_SIDE_EFFECTS (se->expr) = 1;
2581 /* Add the function call to the pre chain. There is no expression. */
2582 gfc_add_expr_to_block (&se->pre, se->expr);
2583 se->expr = NULL_TREE;
2585 if (!se->direct_byref)
2587 if (sym->attr.dimension)
2589 if (flag_bounds_check)
2591 /* Check the data pointer hasn't been modified. This would
2592 happen in a function returning a pointer. */
2593 tmp = gfc_conv_descriptor_data_get (info->descriptor);
2594 tmp = fold_build2 (NE_EXPR, boolean_type_node,
2596 gfc_trans_runtime_check (tmp, &se->pre, NULL, gfc_msg_fault);
2598 se->expr = info->descriptor;
2599 /* Bundle in the string length. */
2600 se->string_length = len;
2602 else if (sym->ts.type == BT_CHARACTER)
2604 /* Dereference for character pointer results. */
2605 if (sym->attr.pointer || sym->attr.allocatable)
2606 se->expr = build_fold_indirect_ref (var);
2610 se->string_length = len;
2614 gcc_assert (sym->ts.type == BT_COMPLEX && gfc_option.flag_f2c);
2615 se->expr = build_fold_indirect_ref (var);
2620 /* Follow the function call with the argument post block. */
2622 gfc_add_block_to_block (&se->pre, &post);
2624 gfc_add_block_to_block (&se->post, &post);
2626 return has_alternate_specifier;
2630 /* Generate code to copy a string. */
2633 gfc_trans_string_copy (stmtblock_t * block, tree dlength, tree dest,
2634 tree slength, tree src)
2636 tree tmp, dlen, slen;
2644 stmtblock_t tempblock;
2646 dlen = fold_convert (size_type_node, gfc_evaluate_now (dlength, block));
2647 slen = fold_convert (size_type_node, gfc_evaluate_now (slength, block));
2649 /* Deal with single character specially. */
2650 dsc = gfc_to_single_character (dlen, dest);
2651 ssc = gfc_to_single_character (slen, src);
2652 if (dsc != NULL_TREE && ssc != NULL_TREE)
2654 gfc_add_modify_expr (block, dsc, ssc);
2658 /* Do nothing if the destination length is zero. */
2659 cond = fold_build2 (GT_EXPR, boolean_type_node, dlen,
2660 build_int_cst (size_type_node, 0));
2662 /* The following code was previously in _gfortran_copy_string:
2664 // The two strings may overlap so we use memmove.
2666 copy_string (GFC_INTEGER_4 destlen, char * dest,
2667 GFC_INTEGER_4 srclen, const char * src)
2669 if (srclen >= destlen)
2671 // This will truncate if too long.
2672 memmove (dest, src, destlen);
2676 memmove (dest, src, srclen);
2678 memset (&dest[srclen], ' ', destlen - srclen);
2682 We're now doing it here for better optimization, but the logic
2685 /* Truncate string if source is too long. */
2686 cond2 = fold_build2 (GE_EXPR, boolean_type_node, slen, dlen);
2687 tmp2 = build_call_expr (built_in_decls[BUILT_IN_MEMMOVE],
2688 3, dest, src, dlen);
2690 /* Else copy and pad with spaces. */
2691 tmp3 = build_call_expr (built_in_decls[BUILT_IN_MEMMOVE],
2692 3, dest, src, slen);
2694 tmp4 = fold_build2 (POINTER_PLUS_EXPR, pchar_type_node, dest,
2695 fold_convert (sizetype, slen));
2696 tmp4 = build_call_expr (built_in_decls[BUILT_IN_MEMSET], 3,
2698 build_int_cst (gfc_get_int_type (gfc_c_int_kind),
2699 lang_hooks.to_target_charset (' ')),
2700 fold_build2 (MINUS_EXPR, TREE_TYPE(dlen),
2703 gfc_init_block (&tempblock);
2704 gfc_add_expr_to_block (&tempblock, tmp3);
2705 gfc_add_expr_to_block (&tempblock, tmp4);
2706 tmp3 = gfc_finish_block (&tempblock);
2708 /* The whole copy_string function is there. */
2709 tmp = fold_build3 (COND_EXPR, void_type_node, cond2, tmp2, tmp3);
2710 tmp = fold_build3 (COND_EXPR, void_type_node, cond, tmp, build_empty_stmt ());
2711 gfc_add_expr_to_block (block, tmp);
2715 /* Translate a statement function.
2716 The value of a statement function reference is obtained by evaluating the
2717 expression using the values of the actual arguments for the values of the
2718 corresponding dummy arguments. */
2721 gfc_conv_statement_function (gfc_se * se, gfc_expr * expr)
2725 gfc_formal_arglist *fargs;
2726 gfc_actual_arglist *args;
2729 gfc_saved_var *saved_vars;
2735 sym = expr->symtree->n.sym;
2736 args = expr->value.function.actual;
2737 gfc_init_se (&lse, NULL);
2738 gfc_init_se (&rse, NULL);
2741 for (fargs = sym->formal; fargs; fargs = fargs->next)
2743 saved_vars = (gfc_saved_var *)gfc_getmem (n * sizeof (gfc_saved_var));
2744 temp_vars = (tree *)gfc_getmem (n * sizeof (tree));
2746 for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++)
2748 /* Each dummy shall be specified, explicitly or implicitly, to be
2750 gcc_assert (fargs->sym->attr.dimension == 0);
2753 /* Create a temporary to hold the value. */
2754 type = gfc_typenode_for_spec (&fsym->ts);
2755 temp_vars[n] = gfc_create_var (type, fsym->name);
2757 if (fsym->ts.type == BT_CHARACTER)
2759 /* Copy string arguments. */
2762 gcc_assert (fsym->ts.cl && fsym->ts.cl->length
2763 && fsym->ts.cl->length->expr_type == EXPR_CONSTANT);
2765 arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
2766 tmp = gfc_build_addr_expr (build_pointer_type (type),
2769 gfc_conv_expr (&rse, args->expr);
2770 gfc_conv_string_parameter (&rse);
2771 gfc_add_block_to_block (&se->pre, &lse.pre);
2772 gfc_add_block_to_block (&se->pre, &rse.pre);
2774 gfc_trans_string_copy (&se->pre, arglen, tmp, rse.string_length,
2776 gfc_add_block_to_block (&se->pre, &lse.post);
2777 gfc_add_block_to_block (&se->pre, &rse.post);
2781 /* For everything else, just evaluate the expression. */
2782 gfc_conv_expr (&lse, args->expr);
2784 gfc_add_block_to_block (&se->pre, &lse.pre);
2785 gfc_add_modify_expr (&se->pre, temp_vars[n], lse.expr);
2786 gfc_add_block_to_block (&se->pre, &lse.post);
2792 /* Use the temporary variables in place of the real ones. */
2793 for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++)
2794 gfc_shadow_sym (fargs->sym, temp_vars[n], &saved_vars[n]);
2796 gfc_conv_expr (se, sym->value);
2798 if (sym->ts.type == BT_CHARACTER)
2800 gfc_conv_const_charlen (sym->ts.cl);
2802 /* Force the expression to the correct length. */
2803 if (!INTEGER_CST_P (se->string_length)
2804 || tree_int_cst_lt (se->string_length,
2805 sym->ts.cl->backend_decl))
2807 type = gfc_get_character_type (sym->ts.kind, sym->ts.cl);
2808 tmp = gfc_create_var (type, sym->name);
2809 tmp = gfc_build_addr_expr (build_pointer_type (type), tmp);
2810 gfc_trans_string_copy (&se->pre, sym->ts.cl->backend_decl, tmp,
2811 se->string_length, se->expr);
2814 se->string_length = sym->ts.cl->backend_decl;
2817 /* Restore the original variables. */
2818 for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++)
2819 gfc_restore_sym (fargs->sym, &saved_vars[n]);
2820 gfc_free (saved_vars);
2824 /* Translate a function expression. */
2827 gfc_conv_function_expr (gfc_se * se, gfc_expr * expr)
2831 if (expr->value.function.isym)
2833 gfc_conv_intrinsic_function (se, expr);
2837 /* We distinguish statement functions from general functions to improve
2838 runtime performance. */
2839 if (expr->symtree->n.sym->attr.proc == PROC_ST_FUNCTION)
2841 gfc_conv_statement_function (se, expr);
2845 /* expr.value.function.esym is the resolved (specific) function symbol for
2846 most functions. However this isn't set for dummy procedures. */
2847 sym = expr->value.function.esym;
2849 sym = expr->symtree->n.sym;
2850 gfc_conv_function_call (se, sym, expr->value.function.actual, NULL_TREE);
2855 gfc_conv_array_constructor_expr (gfc_se * se, gfc_expr * expr)
2857 gcc_assert (se->ss != NULL && se->ss != gfc_ss_terminator);
2858 gcc_assert (se->ss->expr == expr && se->ss->type == GFC_SS_CONSTRUCTOR);
2860 gfc_conv_tmp_array_ref (se);
2861 gfc_advance_se_ss_chain (se);
2865 /* Build a static initializer. EXPR is the expression for the initial value.
2866 The other parameters describe the variable of the component being
2867 initialized. EXPR may be null. */
2870 gfc_conv_initializer (gfc_expr * expr, gfc_typespec * ts, tree type,
2871 bool array, bool pointer)
2875 if (!(expr || pointer))
2878 if (expr != NULL && expr->ts.type == BT_DERIVED
2879 && expr->ts.is_iso_c && expr->ts.derived
2880 && (expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_PTR
2881 || expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_FUNPTR))
2882 expr = gfc_int_expr (0);
2886 /* Arrays need special handling. */
2888 return gfc_build_null_descriptor (type);
2890 return gfc_conv_array_initializer (type, expr);
2893 return fold_convert (type, null_pointer_node);
2899 gfc_init_se (&se, NULL);
2900 gfc_conv_structure (&se, expr, 1);
2904 return gfc_conv_string_init (ts->cl->backend_decl,expr);
2907 gfc_init_se (&se, NULL);
2908 gfc_conv_constant (&se, expr);
2915 gfc_trans_subarray_assign (tree dest, gfc_component * cm, gfc_expr * expr)
2927 gfc_start_block (&block);
2929 /* Initialize the scalarizer. */
2930 gfc_init_loopinfo (&loop);
2932 gfc_init_se (&lse, NULL);
2933 gfc_init_se (&rse, NULL);
2936 rss = gfc_walk_expr (expr);
2937 if (rss == gfc_ss_terminator)
2939 /* The rhs is scalar. Add a ss for the expression. */
2940 rss = gfc_get_ss ();
2941 rss->next = gfc_ss_terminator;
2942 rss->type = GFC_SS_SCALAR;
2946 /* Create a SS for the destination. */
2947 lss = gfc_get_ss ();
2948 lss->type = GFC_SS_COMPONENT;
2950 lss->shape = gfc_get_shape (cm->as->rank);
2951 lss->next = gfc_ss_terminator;
2952 lss->data.info.dimen = cm->as->rank;
2953 lss->data.info.descriptor = dest;
2954 lss->data.info.data = gfc_conv_array_data (dest);
2955 lss->data.info.offset = gfc_conv_array_offset (dest);
2956 for (n = 0; n < cm->as->rank; n++)
2958 lss->data.info.dim[n] = n;
2959 lss->data.info.start[n] = gfc_conv_array_lbound (dest, n);
2960 lss->data.info.stride[n] = gfc_index_one_node;
2962 mpz_init (lss->shape[n]);
2963 mpz_sub (lss->shape[n], cm->as->upper[n]->value.integer,
2964 cm->as->lower[n]->value.integer);
2965 mpz_add_ui (lss->shape[n], lss->shape[n], 1);
2968 /* Associate the SS with the loop. */
2969 gfc_add_ss_to_loop (&loop, lss);
2970 gfc_add_ss_to_loop (&loop, rss);
2972 /* Calculate the bounds of the scalarization. */
2973 gfc_conv_ss_startstride (&loop);
2975 /* Setup the scalarizing loops. */
2976 gfc_conv_loop_setup (&loop);
2978 /* Setup the gfc_se structures. */
2979 gfc_copy_loopinfo_to_se (&lse, &loop);
2980 gfc_copy_loopinfo_to_se (&rse, &loop);
2983 gfc_mark_ss_chain_used (rss, 1);
2985 gfc_mark_ss_chain_used (lss, 1);
2987 /* Start the scalarized loop body. */
2988 gfc_start_scalarized_body (&loop, &body);
2990 gfc_conv_tmp_array_ref (&lse);
2991 if (cm->ts.type == BT_CHARACTER)
2992 lse.string_length = cm->ts.cl->backend_decl;
2994 gfc_conv_expr (&rse, expr);
2996 tmp = gfc_trans_scalar_assign (&lse, &rse, cm->ts, true, false);
2997 gfc_add_expr_to_block (&body, tmp);
2999 gcc_assert (rse.ss == gfc_ss_terminator);
3001 /* Generate the copying loops. */
3002 gfc_trans_scalarizing_loops (&loop, &body);
3004 /* Wrap the whole thing up. */
3005 gfc_add_block_to_block (&block, &loop.pre);
3006 gfc_add_block_to_block (&block, &loop.post);
3008 for (n = 0; n < cm->as->rank; n++)
3009 mpz_clear (lss->shape[n]);
3010 gfc_free (lss->shape);
3012 gfc_cleanup_loop (&loop);
3014 return gfc_finish_block (&block);
3018 /* Assign a single component of a derived type constructor. */
3021 gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr)
3031 gfc_start_block (&block);
3035 gfc_init_se (&se, NULL);
3036 /* Pointer component. */
3039 /* Array pointer. */
3040 if (expr->expr_type == EXPR_NULL)
3041 gfc_conv_descriptor_data_set (&block, dest, null_pointer_node);
3044 rss = gfc_walk_expr (expr);
3045 se.direct_byref = 1;
3047 gfc_conv_expr_descriptor (&se, expr, rss);
3048 gfc_add_block_to_block (&block, &se.pre);
3049 gfc_add_block_to_block (&block, &se.post);
3054 /* Scalar pointers. */
3055 se.want_pointer = 1;
3056 gfc_conv_expr (&se, expr);
3057 gfc_add_block_to_block (&block, &se.pre);
3058 gfc_add_modify_expr (&block, dest,
3059 fold_convert (TREE_TYPE (dest), se.expr));
3060 gfc_add_block_to_block (&block, &se.post);
3063 else if (cm->dimension)
3065 if (cm->allocatable && expr->expr_type == EXPR_NULL)
3066 gfc_conv_descriptor_data_set (&block, dest, null_pointer_node);
3067 else if (cm->allocatable)
3071 gfc_init_se (&se, NULL);
3073 rss = gfc_walk_expr (expr);
3074 se.want_pointer = 0;
3075 gfc_conv_expr_descriptor (&se, expr, rss);
3076 gfc_add_block_to_block (&block, &se.pre);
3078 tmp = fold_convert (TREE_TYPE (dest), se.expr);
3079 gfc_add_modify_expr (&block, dest, tmp);
3081 if (cm->ts.type == BT_DERIVED && cm->ts.derived->attr.alloc_comp)
3082 tmp = gfc_copy_alloc_comp (cm->ts.derived, se.expr, dest,
3085 tmp = gfc_duplicate_allocatable (dest, se.expr,
3086 TREE_TYPE(cm->backend_decl),
3089 gfc_add_expr_to_block (&block, tmp);
3091 gfc_add_block_to_block (&block, &se.post);
3092 gfc_conv_descriptor_data_set (&block, se.expr, null_pointer_node);
3094 /* Shift the lbound and ubound of temporaries to being unity, rather
3095 than zero, based. Calculate the offset for all cases. */
3096 offset = gfc_conv_descriptor_offset (dest);
3097 gfc_add_modify_expr (&block, offset, gfc_index_zero_node);
3098 tmp2 =gfc_create_var (gfc_array_index_type, NULL);
3099 for (n = 0; n < expr->rank; n++)
3101 if (expr->expr_type != EXPR_VARIABLE
3102 && expr->expr_type != EXPR_CONSTANT)
3105 tmp = gfc_conv_descriptor_ubound (dest, gfc_rank_cst[n]);
3106 span = fold_build2 (MINUS_EXPR, gfc_array_index_type, tmp,
3107 gfc_conv_descriptor_lbound (dest, gfc_rank_cst[n]));
3108 gfc_add_modify_expr (&block, tmp,
3109 fold_build2 (PLUS_EXPR,
3110 gfc_array_index_type,
3111 span, gfc_index_one_node));
3112 tmp = gfc_conv_descriptor_lbound (dest, gfc_rank_cst[n]);
3113 gfc_add_modify_expr (&block, tmp, gfc_index_one_node);
3115 tmp = fold_build2 (MULT_EXPR, gfc_array_index_type,
3116 gfc_conv_descriptor_lbound (dest,
3118 gfc_conv_descriptor_stride (dest,
3120 gfc_add_modify_expr (&block, tmp2, tmp);
3121 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp2);
3122 gfc_add_modify_expr (&block, offset, tmp);
3127 tmp = gfc_trans_subarray_assign (dest, cm, expr);
3128 gfc_add_expr_to_block (&block, tmp);
3131 else if (expr->ts.type == BT_DERIVED)
3133 if (expr->expr_type != EXPR_STRUCTURE)
3135 gfc_init_se (&se, NULL);
3136 gfc_conv_expr (&se, expr);
3137 gfc_add_modify_expr (&block, dest,
3138 fold_convert (TREE_TYPE (dest), se.expr));
3142 /* Nested constructors. */
3143 tmp = gfc_trans_structure_assign (dest, expr);
3144 gfc_add_expr_to_block (&block, tmp);
3149 /* Scalar component. */
3150 gfc_init_se (&se, NULL);
3151 gfc_init_se (&lse, NULL);
3153 gfc_conv_expr (&se, expr);
3154 if (cm->ts.type == BT_CHARACTER)
3155 lse.string_length = cm->ts.cl->backend_decl;
3157 tmp = gfc_trans_scalar_assign (&lse, &se, cm->ts, true, false);
3158 gfc_add_expr_to_block (&block, tmp);
3160 return gfc_finish_block (&block);
3163 /* Assign a derived type constructor to a variable. */
3166 gfc_trans_structure_assign (tree dest, gfc_expr * expr)
3174 gfc_start_block (&block);
3175 cm = expr->ts.derived->components;
3176 for (c = expr->value.constructor; c; c = c->next, cm = cm->next)
3178 /* Skip absent members in default initializers. */
3182 field = cm->backend_decl;
3183 tmp = build3 (COMPONENT_REF, TREE_TYPE (field), dest, field, NULL_TREE);
3184 tmp = gfc_trans_subcomponent_assign (tmp, cm, c->expr);
3185 gfc_add_expr_to_block (&block, tmp);
3187 return gfc_finish_block (&block);
3190 /* Build an expression for a constructor. If init is nonzero then
3191 this is part of a static variable initializer. */
3194 gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init)
3201 VEC(constructor_elt,gc) *v = NULL;
3203 gcc_assert (se->ss == NULL);
3204 gcc_assert (expr->expr_type == EXPR_STRUCTURE);
3205 type = gfc_typenode_for_spec (&expr->ts);
3209 /* Create a temporary variable and fill it in. */
3210 se->expr = gfc_create_var (type, expr->ts.derived->name);
3211 tmp = gfc_trans_structure_assign (se->expr, expr);
3212 gfc_add_expr_to_block (&se->pre, tmp);
3216 cm = expr->ts.derived->components;
3218 for (c = expr->value.constructor; c; c = c->next, cm = cm->next)
3220 /* Skip absent members in default initializers and allocatable
3221 components. Although the latter have a default initializer
3222 of EXPR_NULL,... by default, the static nullify is not needed
3223 since this is done every time we come into scope. */
3224 if (!c->expr || cm->allocatable)
3227 val = gfc_conv_initializer (c->expr, &cm->ts,
3228 TREE_TYPE (cm->backend_decl), cm->dimension, cm->pointer);
3230 /* Append it to the constructor list. */
3231 CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val);
3233 se->expr = build_constructor (type, v);
3237 /* Translate a substring expression. */
3240 gfc_conv_substring_expr (gfc_se * se, gfc_expr * expr)
3246 gcc_assert (ref == NULL || ref->type == REF_SUBSTRING);
3248 se->expr = gfc_build_string_const (expr->value.character.length,
3249 expr->value.character.string);
3250 se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr)));
3251 TYPE_STRING_FLAG (TREE_TYPE (se->expr)) = 1;
3254 gfc_conv_substring (se, ref, expr->ts.kind, NULL, &expr->where);
3258 /* Entry point for expression translation. Evaluates a scalar quantity.
3259 EXPR is the expression to be translated, and SE is the state structure if
3260 called from within the scalarized. */
3263 gfc_conv_expr (gfc_se * se, gfc_expr * expr)
3265 if (se->ss && se->ss->expr == expr
3266 && (se->ss->type == GFC_SS_SCALAR || se->ss->type == GFC_SS_REFERENCE))
3268 /* Substitute a scalar expression evaluated outside the scalarization
3270 se->expr = se->ss->data.scalar.expr;
3271 se->string_length = se->ss->string_length;
3272 gfc_advance_se_ss_chain (se);
3276 /* We need to convert the expressions for the iso_c_binding derived types.
3277 C_NULL_PTR and C_NULL_FUNPTR will be made EXPR_NULL, which evaluates to
3278 null_pointer_node. C_PTR and C_FUNPTR are converted to match the
3279 typespec for the C_PTR and C_FUNPTR symbols, which has already been
3280 updated to be an integer with a kind equal to the size of a (void *). */
3281 if (expr->ts.type == BT_DERIVED && expr->ts.derived
3282 && expr->ts.derived->attr.is_iso_c)
3284 if (expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_PTR
3285 || expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_FUNPTR)
3287 /* Set expr_type to EXPR_NULL, which will result in
3288 null_pointer_node being used below. */
3289 expr->expr_type = EXPR_NULL;
3293 /* Update the type/kind of the expression to be what the new
3294 type/kind are for the updated symbols of C_PTR/C_FUNPTR. */
3295 expr->ts.type = expr->ts.derived->ts.type;
3296 expr->ts.f90_type = expr->ts.derived->ts.f90_type;
3297 expr->ts.kind = expr->ts.derived->ts.kind;
3301 switch (expr->expr_type)
3304 gfc_conv_expr_op (se, expr);
3308 gfc_conv_function_expr (se, expr);
3312 gfc_conv_constant (se, expr);
3316 gfc_conv_variable (se, expr);
3320 se->expr = null_pointer_node;
3323 case EXPR_SUBSTRING:
3324 gfc_conv_substring_expr (se, expr);
3327 case EXPR_STRUCTURE:
3328 gfc_conv_structure (se, expr, 0);
3332 gfc_conv_array_constructor_expr (se, expr);
3341 /* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs
3342 of an assignment. */
3344 gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr)
3346 gfc_conv_expr (se, expr);
3347 /* All numeric lvalues should have empty post chains. If not we need to
3348 figure out a way of rewriting an lvalue so that it has no post chain. */
3349 gcc_assert (expr->ts.type == BT_CHARACTER || !se->post.head);
3352 /* Like gfc_conv_expr, but the POST block is guaranteed to be empty for
3353 numeric expressions. Used for scalar values where inserting cleanup code
3356 gfc_conv_expr_val (gfc_se * se, gfc_expr * expr)
3360 gcc_assert (expr->ts.type != BT_CHARACTER);
3361 gfc_conv_expr (se, expr);
3364 val = gfc_create_var (TREE_TYPE (se->expr), NULL);
3365 gfc_add_modify_expr (&se->pre, val, se->expr);
3367 gfc_add_block_to_block (&se->pre, &se->post);
3371 /* Helper to translate and expression and convert it to a particular type. */
3373 gfc_conv_expr_type (gfc_se * se, gfc_expr * expr, tree type)
3375 gfc_conv_expr_val (se, expr);
3376 se->expr = convert (type, se->expr);
3380 /* Converts an expression so that it can be passed by reference. Scalar
3384 gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr)
3388 if (se->ss && se->ss->expr == expr
3389 && se->ss->type == GFC_SS_REFERENCE)
3391 se->expr = se->ss->data.scalar.expr;
3392 se->string_length = se->ss->string_length;
3393 gfc_advance_se_ss_chain (se);
3397 if (expr->ts.type == BT_CHARACTER)
3399 gfc_conv_expr (se, expr);
3400 gfc_conv_string_parameter (se);
3404 if (expr->expr_type == EXPR_VARIABLE)
3406 se->want_pointer = 1;
3407 gfc_conv_expr (se, expr);
3410 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
3411 gfc_add_modify_expr (&se->pre, var, se->expr);
3412 gfc_add_block_to_block (&se->pre, &se->post);
3418 if (expr->expr_type == EXPR_FUNCTION
3419 && expr->symtree->n.sym->attr.pointer
3420 && !expr->symtree->n.sym->attr.dimension)
3422 se->want_pointer = 1;
3423 gfc_conv_expr (se, expr);
3424 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
3425 gfc_add_modify_expr (&se->pre, var, se->expr);
3431 gfc_conv_expr (se, expr);
3433 /* Create a temporary var to hold the value. */
3434 if (TREE_CONSTANT (se->expr))
3436 tree tmp = se->expr;
3437 STRIP_TYPE_NOPS (tmp);
3438 var = build_decl (CONST_DECL, NULL, TREE_TYPE (tmp));
3439 DECL_INITIAL (var) = tmp;
3440 TREE_STATIC (var) = 1;
3445 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
3446 gfc_add_modify_expr (&se->pre, var, se->expr);
3448 gfc_add_block_to_block (&se->pre, &se->post);
3450 /* Take the address of that value. */
3451 se->expr = build_fold_addr_expr (var);
3456 gfc_trans_pointer_assign (gfc_code * code)
3458 return gfc_trans_pointer_assignment (code->expr, code->expr2);
3462 /* Generate code for a pointer assignment. */
3465 gfc_trans_pointer_assignment (gfc_expr * expr1, gfc_expr * expr2)
3475 gfc_start_block (&block);
3477 gfc_init_se (&lse, NULL);
3479 lss = gfc_walk_expr (expr1);
3480 rss = gfc_walk_expr (expr2);
3481 if (lss == gfc_ss_terminator)
3483 /* Scalar pointers. */
3484 lse.want_pointer = 1;
3485 gfc_conv_expr (&lse, expr1);
3486 gcc_assert (rss == gfc_ss_terminator);
3487 gfc_init_se (&rse, NULL);
3488 rse.want_pointer = 1;
3489 gfc_conv_expr (&rse, expr2);
3490 gfc_add_block_to_block (&block, &lse.pre);
3491 gfc_add_block_to_block (&block, &rse.pre);
3492 gfc_add_modify_expr (&block, lse.expr,
3493 fold_convert (TREE_TYPE (lse.expr), rse.expr));
3494 gfc_add_block_to_block (&block, &rse.post);
3495 gfc_add_block_to_block (&block, &lse.post);
3499 /* Array pointer. */
3500 gfc_conv_expr_descriptor (&lse, expr1, lss);
3501 switch (expr2->expr_type)
3504 /* Just set the data pointer to null. */
3505 gfc_conv_descriptor_data_set (&lse.pre, lse.expr, null_pointer_node);
3509 /* Assign directly to the pointer's descriptor. */
3510 lse.direct_byref = 1;
3511 gfc_conv_expr_descriptor (&lse, expr2, rss);
3515 /* Assign to a temporary descriptor and then copy that
3516 temporary to the pointer. */
3518 tmp = gfc_create_var (TREE_TYPE (desc), "ptrtemp");
3521 lse.direct_byref = 1;
3522 gfc_conv_expr_descriptor (&lse, expr2, rss);
3523 gfc_add_modify_expr (&lse.pre, desc, tmp);
3526 gfc_add_block_to_block (&block, &lse.pre);
3527 gfc_add_block_to_block (&block, &lse.post);
3529 return gfc_finish_block (&block);
3533 /* Makes sure se is suitable for passing as a function string parameter. */
3534 /* TODO: Need to check all callers fo this function. It may be abused. */
3537 gfc_conv_string_parameter (gfc_se * se)
3541 if (TREE_CODE (se->expr) == STRING_CST)
3543 se->expr = gfc_build_addr_expr (pchar_type_node, se->expr);
3547 type = TREE_TYPE (se->expr);
3548 if (TYPE_STRING_FLAG (type))
3550 gcc_assert (TREE_CODE (se->expr) != INDIRECT_REF);
3551 se->expr = gfc_build_addr_expr (pchar_type_node, se->expr);
3554 gcc_assert (POINTER_TYPE_P (TREE_TYPE (se->expr)));
3555 gcc_assert (se->string_length
3556 && TREE_CODE (TREE_TYPE (se->string_length)) == INTEGER_TYPE);
3560 /* Generate code for assignment of scalar variables. Includes character
3561 strings and derived types with allocatable components. */
3564 gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts,
3565 bool l_is_temp, bool r_is_var)
3571 gfc_init_block (&block);
3573 if (ts.type == BT_CHARACTER)
3575 gcc_assert (lse->string_length != NULL_TREE
3576 && rse->string_length != NULL_TREE);
3578 gfc_conv_string_parameter (lse);
3579 gfc_conv_string_parameter (rse);
3581 gfc_add_block_to_block (&block, &lse->pre);
3582 gfc_add_block_to_block (&block, &rse->pre);
3584 gfc_trans_string_copy (&block, lse->string_length, lse->expr,
3585 rse->string_length, rse->expr);
3587 else if (ts.type == BT_DERIVED && ts.derived->attr.alloc_comp)
3591 /* Are the rhs and the lhs the same? */
3594 cond = fold_build2 (EQ_EXPR, boolean_type_node,
3595 build_fold_addr_expr (lse->expr),
3596 build_fold_addr_expr (rse->expr));
3597 cond = gfc_evaluate_now (cond, &lse->pre);
3600 /* Deallocate the lhs allocated components as long as it is not
3601 the same as the rhs. This must be done following the assignment
3602 to prevent deallocating data that could be used in the rhs
3606 tmp = gfc_evaluate_now (lse->expr, &lse->pre);
3607 tmp = gfc_deallocate_alloc_comp (ts.derived, tmp, 0);
3609 tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp);
3610 gfc_add_expr_to_block (&lse->post, tmp);
3613 gfc_add_block_to_block (&block, &rse->pre);
3614 gfc_add_block_to_block (&block, &lse->pre);
3616 gfc_add_modify_expr (&block, lse->expr,
3617 fold_convert (TREE_TYPE (lse->expr), rse->expr));
3619 /* Do a deep copy if the rhs is a variable, if it is not the
3623 tmp = gfc_copy_alloc_comp (ts.derived, rse->expr, lse->expr, 0);
3624 tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp);
3625 gfc_add_expr_to_block (&block, tmp);
3630 gfc_add_block_to_block (&block, &lse->pre);
3631 gfc_add_block_to_block (&block, &rse->pre);
3633 gfc_add_modify_expr (&block, lse->expr,
3634 fold_convert (TREE_TYPE (lse->expr), rse->expr));
3637 gfc_add_block_to_block (&block, &lse->post);
3638 gfc_add_block_to_block (&block, &rse->post);
3640 return gfc_finish_block (&block);
3644 /* Try to translate array(:) = func (...), where func is a transformational
3645 array function, without using a temporary. Returns NULL is this isn't the
3649 gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2)
3654 bool seen_array_ref;
3656 /* The caller has already checked rank>0 and expr_type == EXPR_FUNCTION. */
3657 if (expr2->value.function.isym && !gfc_is_intrinsic_libcall (expr2))
3660 /* Elemental functions don't need a temporary anyway. */
3661 if (expr2->value.function.esym != NULL
3662 && expr2->value.function.esym->attr.elemental)
3665 /* Fail if EXPR1 can't be expressed as a descriptor. */
3666 if (gfc_ref_needs_temporary_p (expr1->ref))
3669 /* Functions returning pointers need temporaries. */
3670 if (expr2->symtree->n.sym->attr.pointer
3671 || expr2->symtree->n.sym->attr.allocatable)
3674 /* Character array functions need temporaries unless the
3675 character lengths are the same. */
3676 if (expr2->ts.type == BT_CHARACTER && expr2->rank > 0)
3678 if (expr1->ts.cl->length == NULL
3679 || expr1->ts.cl->length->expr_type != EXPR_CONSTANT)
3682 if (expr2->ts.cl->length == NULL
3683 || expr2->ts.cl->length->expr_type != EXPR_CONSTANT)
3686 if (mpz_cmp (expr1->ts.cl->length->value.integer,
3687 expr2->ts.cl->length->value.integer) != 0)
3691 /* Check that no LHS component references appear during an array
3692 reference. This is needed because we do not have the means to
3693 span any arbitrary stride with an array descriptor. This check
3694 is not needed for the rhs because the function result has to be
3696 seen_array_ref = false;
3697 for (ref = expr1->ref; ref; ref = ref->next)
3699 if (ref->type == REF_ARRAY)
3700 seen_array_ref= true;
3701 else if (ref->type == REF_COMPONENT && seen_array_ref)
3705 /* Check for a dependency. */
3706 if (gfc_check_fncall_dependency (expr1, INTENT_OUT,
3707 expr2->value.function.esym,
3708 expr2->value.function.actual))
3711 /* The frontend doesn't seem to bother filling in expr->symtree for intrinsic
3713 gcc_assert (expr2->value.function.isym
3714 || (gfc_return_by_reference (expr2->value.function.esym)
3715 && expr2->value.function.esym->result->attr.dimension));
3717 ss = gfc_walk_expr (expr1);
3718 gcc_assert (ss != gfc_ss_terminator);
3719 gfc_init_se (&se, NULL);
3720 gfc_start_block (&se.pre);
3721 se.want_pointer = 1;
3723 gfc_conv_array_parameter (&se, expr1, ss, 0);
3725 se.direct_byref = 1;
3726 se.ss = gfc_walk_expr (expr2);
3727 gcc_assert (se.ss != gfc_ss_terminator);
3728 gfc_conv_function_expr (&se, expr2);
3729 gfc_add_block_to_block (&se.pre, &se.post);
3731 return gfc_finish_block (&se.pre);
3734 /* Determine whether the given EXPR_CONSTANT is a zero initializer. */
3737 is_zero_initializer_p (gfc_expr * expr)
3739 if (expr->expr_type != EXPR_CONSTANT)
3742 /* We ignore constants with prescribed memory representations for now. */
3743 if (expr->representation.string)
3746 switch (expr->ts.type)
3749 return mpz_cmp_si (expr->value.integer, 0) == 0;
3752 return mpfr_zero_p (expr->value.real)
3753 && MPFR_SIGN (expr->value.real) >= 0;
3756 return expr->value.logical == 0;
3759 return mpfr_zero_p (expr->value.complex.r)
3760 && MPFR_SIGN (expr->value.complex.r) >= 0
3761 && mpfr_zero_p (expr->value.complex.i)
3762 && MPFR_SIGN (expr->value.complex.i) >= 0;
3770 /* Try to efficiently translate array(:) = 0. Return NULL if this
3774 gfc_trans_zero_assign (gfc_expr * expr)
3776 tree dest, len, type;
3780 sym = expr->symtree->n.sym;
3781 dest = gfc_get_symbol_decl (sym);
3783 type = TREE_TYPE (dest);
3784 if (POINTER_TYPE_P (type))
3785 type = TREE_TYPE (type);
3786 if (!GFC_ARRAY_TYPE_P (type))
3789 /* Determine the length of the array. */
3790 len = GFC_TYPE_ARRAY_SIZE (type);
3791 if (!len || TREE_CODE (len) != INTEGER_CST)
3794 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (type));
3795 len = fold_build2 (MULT_EXPR, gfc_array_index_type, len,
3796 fold_convert (gfc_array_index_type, tmp));
3798 /* Convert arguments to the correct types. */
3799 if (!POINTER_TYPE_P (TREE_TYPE (dest)))
3800 dest = gfc_build_addr_expr (pvoid_type_node, dest);
3802 dest = fold_convert (pvoid_type_node, dest);
3803 len = fold_convert (size_type_node, len);
3805 /* Construct call to __builtin_memset. */
3806 tmp = build_call_expr (built_in_decls[BUILT_IN_MEMSET],
3807 3, dest, integer_zero_node, len);
3808 return fold_convert (void_type_node, tmp);
3812 /* Helper for gfc_trans_array_copy and gfc_trans_array_constructor_copy
3813 that constructs the call to __builtin_memcpy. */
3816 gfc_build_memcpy_call (tree dst, tree src, tree len)
3820 /* Convert arguments to the correct types. */
3821 if (!POINTER_TYPE_P (TREE_TYPE (dst)))
3822 dst = gfc_build_addr_expr (pvoid_type_node, dst);
3824 dst = fold_convert (pvoid_type_node, dst);
3826 if (!POINTER_TYPE_P (TREE_TYPE (src)))
3827 src = gfc_build_addr_expr (pvoid_type_node, src);
3829 src = fold_convert (pvoid_type_node, src);
3831 len = fold_convert (size_type_node, len);
3833 /* Construct call to __builtin_memcpy. */
3834 tmp = build_call_expr (built_in_decls[BUILT_IN_MEMCPY], 3, dst, src, len);
3835 return fold_convert (void_type_node, tmp);
3839 /* Try to efficiently translate dst(:) = src(:). Return NULL if this
3840 can't be done. EXPR1 is the destination/lhs and EXPR2 is the
3841 source/rhs, both are gfc_full_array_ref_p which have been checked for
3845 gfc_trans_array_copy (gfc_expr * expr1, gfc_expr * expr2)
3847 tree dst, dlen, dtype;
3848 tree src, slen, stype;
3851 dst = gfc_get_symbol_decl (expr1->symtree->n.sym);
3852 src = gfc_get_symbol_decl (expr2->symtree->n.sym);
3854 dtype = TREE_TYPE (dst);
3855 if (POINTER_TYPE_P (dtype))
3856 dtype = TREE_TYPE (dtype);
3857 stype = TREE_TYPE (src);
3858 if (POINTER_TYPE_P (stype))
3859 stype = TREE_TYPE (stype);
3861 if (!GFC_ARRAY_TYPE_P (dtype) || !GFC_ARRAY_TYPE_P (stype))
3864 /* Determine the lengths of the arrays. */
3865 dlen = GFC_TYPE_ARRAY_SIZE (dtype);
3866 if (!dlen || TREE_CODE (dlen) != INTEGER_CST)
3868 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (dtype));
3869 dlen = fold_build2 (MULT_EXPR, gfc_array_index_type, dlen,
3870 fold_convert (gfc_array_index_type, tmp));
3872 slen = GFC_TYPE_ARRAY_SIZE (stype);
3873 if (!slen || TREE_CODE (slen) != INTEGER_CST)
3875 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (stype));
3876 slen = fold_build2 (MULT_EXPR, gfc_array_index_type, slen,
3877 fold_convert (gfc_array_index_type, tmp));
3879 /* Sanity check that they are the same. This should always be
3880 the case, as we should already have checked for conformance. */
3881 if (!tree_int_cst_equal (slen, dlen))
3884 return gfc_build_memcpy_call (dst, src, dlen);
3888 /* Try to efficiently translate array(:) = (/ ... /). Return NULL if
3889 this can't be done. EXPR1 is the destination/lhs for which
3890 gfc_full_array_ref_p is true, and EXPR2 is the source/rhs. */
3893 gfc_trans_array_constructor_copy (gfc_expr * expr1, gfc_expr * expr2)
3895 unsigned HOST_WIDE_INT nelem;
3901 nelem = gfc_constant_array_constructor_p (expr2->value.constructor);
3905 dst = gfc_get_symbol_decl (expr1->symtree->n.sym);
3906 dtype = TREE_TYPE (dst);
3907 if (POINTER_TYPE_P (dtype))
3908 dtype = TREE_TYPE (dtype);
3909 if (!GFC_ARRAY_TYPE_P (dtype))
3912 /* Determine the lengths of the array. */
3913 len = GFC_TYPE_ARRAY_SIZE (dtype);
3914 if (!len || TREE_CODE (len) != INTEGER_CST)
3917 /* Confirm that the constructor is the same size. */
3918 if (compare_tree_int (len, nelem) != 0)
3921 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (dtype));
3922 len = fold_build2 (MULT_EXPR, gfc_array_index_type, len,
3923 fold_convert (gfc_array_index_type, tmp));
3925 stype = gfc_typenode_for_spec (&expr2->ts);
3926 src = gfc_build_constant_array_constructor (expr2, stype);
3928 stype = TREE_TYPE (src);
3929 if (POINTER_TYPE_P (stype))
3930 stype = TREE_TYPE (stype);
3932 return gfc_build_memcpy_call (dst, src, len);
3936 /* Subroutine of gfc_trans_assignment that actually scalarizes the
3937 assignment. EXPR1 is the destination/RHS and EXPR2 is the source/LHS. */
3940 gfc_trans_assignment_1 (gfc_expr * expr1, gfc_expr * expr2, bool init_flag)
3945 gfc_ss *lss_section;
3953 /* Assignment of the form lhs = rhs. */
3954 gfc_start_block (&block);
3956 gfc_init_se (&lse, NULL);
3957 gfc_init_se (&rse, NULL);
3960 lss = gfc_walk_expr (expr1);
3962 if (lss != gfc_ss_terminator)
3964 /* The assignment needs scalarization. */
3967 /* Find a non-scalar SS from the lhs. */
3968 while (lss_section != gfc_ss_terminator
3969 && lss_section->type != GFC_SS_SECTION)
3970 lss_section = lss_section->next;
3972 gcc_assert (lss_section != gfc_ss_terminator);
3974 /* Initialize the scalarizer. */
3975 gfc_init_loopinfo (&loop);
3978 rss = gfc_walk_expr (expr2);
3979 if (rss == gfc_ss_terminator)
3981 /* The rhs is scalar. Add a ss for the expression. */
3982 rss = gfc_get_ss ();
3983 rss->next = gfc_ss_terminator;
3984 rss->type = GFC_SS_SCALAR;
3987 /* Associate the SS with the loop. */
3988 gfc_add_ss_to_loop (&loop, lss);
3989 gfc_add_ss_to_loop (&loop, rss);
3991 /* Calculate the bounds of the scalarization. */
3992 gfc_conv_ss_startstride (&loop);
3993 /* Resolve any data dependencies in the statement. */
3994 gfc_conv_resolve_dependencies (&loop, lss, rss);
3995 /* Setup the scalarizing loops. */
3996 gfc_conv_loop_setup (&loop);
3998 /* Setup the gfc_se structures. */
3999 gfc_copy_loopinfo_to_se (&lse, &loop);
4000 gfc_copy_loopinfo_to_se (&rse, &loop);
4003 gfc_mark_ss_chain_used (rss, 1);
4004 if (loop.temp_ss == NULL)
4007 gfc_mark_ss_chain_used (lss, 1);
4011 lse.ss = loop.temp_ss;
4012 gfc_mark_ss_chain_used (lss, 3);
4013 gfc_mark_ss_chain_used (loop.temp_ss, 3);
4016 /* Start the scalarized loop body. */
4017 gfc_start_scalarized_body (&loop, &body);
4020 gfc_init_block (&body);
4022 l_is_temp = (lss != gfc_ss_terminator && loop.temp_ss != NULL);
4024 /* Translate the expression. */
4025 gfc_conv_expr (&rse, expr2);
4029 gfc_conv_tmp_array_ref (&lse);
4030 gfc_advance_se_ss_chain (&lse);
4033 gfc_conv_expr (&lse, expr1);
4035 tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts,
4036 l_is_temp || init_flag,
4037 expr2->expr_type == EXPR_VARIABLE);
4038 gfc_add_expr_to_block (&body, tmp);
4040 if (lss == gfc_ss_terminator)
4042 /* Use the scalar assignment as is. */
4043 gfc_add_block_to_block (&block, &body);
4047 gcc_assert (lse.ss == gfc_ss_terminator
4048 && rse.ss == gfc_ss_terminator);
4052 gfc_trans_scalarized_loop_boundary (&loop, &body);
4054 /* We need to copy the temporary to the actual lhs. */
4055 gfc_init_se (&lse, NULL);
4056 gfc_init_se (&rse, NULL);
4057 gfc_copy_loopinfo_to_se (&lse, &loop);
4058 gfc_copy_loopinfo_to_se (&rse, &loop);
4060 rse.ss = loop.temp_ss;
4063 gfc_conv_tmp_array_ref (&rse);
4064 gfc_advance_se_ss_chain (&rse);
4065 gfc_conv_expr (&lse, expr1);
4067 gcc_assert (lse.ss == gfc_ss_terminator
4068 && rse.ss == gfc_ss_terminator);
4070 tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts,
4072 gfc_add_expr_to_block (&body, tmp);
4075 /* Generate the copying loops. */
4076 gfc_trans_scalarizing_loops (&loop, &body);
4078 /* Wrap the whole thing up. */
4079 gfc_add_block_to_block (&block, &loop.pre);
4080 gfc_add_block_to_block (&block, &loop.post);
4082 gfc_cleanup_loop (&loop);
4085 return gfc_finish_block (&block);
4089 /* Check whether EXPR, which is an EXPR_VARIABLE, is a copyable array. */
4092 copyable_array_p (gfc_expr * expr)
4094 /* First check it's an array. */
4095 if (expr->rank < 1 || !expr->ref)
4098 /* Next check that it's of a simple enough type. */
4099 switch (expr->ts.type)
4111 return !expr->ts.derived->attr.alloc_comp;
4120 /* Translate an assignment. */
4123 gfc_trans_assignment (gfc_expr * expr1, gfc_expr * expr2, bool init_flag)
4127 /* Special case a single function returning an array. */
4128 if (expr2->expr_type == EXPR_FUNCTION && expr2->rank > 0)
4130 tmp = gfc_trans_arrayfunc_assign (expr1, expr2);
4135 /* Special case assigning an array to zero. */
4136 if (expr1->expr_type == EXPR_VARIABLE
4139 && expr1->ref->next == NULL
4140 && gfc_full_array_ref_p (expr1->ref)
4141 && is_zero_initializer_p (expr2))
4143 tmp = gfc_trans_zero_assign (expr1);
4148 /* Special case copying one array to another. */
4149 if (expr1->expr_type == EXPR_VARIABLE
4150 && copyable_array_p (expr1)
4151 && gfc_full_array_ref_p (expr1->ref)
4152 && expr2->expr_type == EXPR_VARIABLE
4153 && copyable_array_p (expr2)
4154 && gfc_full_array_ref_p (expr2->ref)
4155 && gfc_compare_types (&expr1->ts, &expr2->ts)
4156 && !gfc_check_dependency (expr1, expr2, 0))
4158 tmp = gfc_trans_array_copy (expr1, expr2);
4163 /* Special case initializing an array from a constant array constructor. */
4164 if (expr1->expr_type == EXPR_VARIABLE
4165 && copyable_array_p (expr1)
4166 && gfc_full_array_ref_p (expr1->ref)
4167 && expr2->expr_type == EXPR_ARRAY
4168 && gfc_compare_types (&expr1->ts, &expr2->ts))
4170 tmp = gfc_trans_array_constructor_copy (expr1, expr2);
4175 /* Fallback to the scalarizer to generate explicit loops. */
4176 return gfc_trans_assignment_1 (expr1, expr2, init_flag);
4180 gfc_trans_init_assign (gfc_code * code)
4182 return gfc_trans_assignment (code->expr, code->expr2, true);
4186 gfc_trans_assign (gfc_code * code)
4188 return gfc_trans_assignment (code->expr, code->expr2, false);