1 /* Expression translation
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
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"
34 #include "langhooks.h"
39 #include "trans-const.h"
40 #include "trans-types.h"
41 #include "trans-array.h"
42 /* Only for gfc_trans_assign and gfc_trans_pointer_assign. */
43 #include "trans-stmt.h"
44 #include "dependency.h"
46 static tree gfc_trans_structure_assign (tree dest, gfc_expr * expr);
47 static void gfc_apply_interface_mapping_to_expr (gfc_interface_mapping *,
50 /* Copy the scalarization loop variables. */
53 gfc_copy_se_loopvars (gfc_se * dest, gfc_se * src)
56 dest->loop = src->loop;
60 /* Initialize a simple expression holder.
62 Care must be taken when multiple se are created with the same parent.
63 The child se must be kept in sync. The easiest way is to delay creation
64 of a child se until after after the previous se has been translated. */
67 gfc_init_se (gfc_se * se, gfc_se * parent)
69 memset (se, 0, sizeof (gfc_se));
70 gfc_init_block (&se->pre);
71 gfc_init_block (&se->post);
76 gfc_copy_se_loopvars (se, parent);
80 /* Advances to the next SS in the chain. Use this rather than setting
81 se->ss = se->ss->next because all the parents needs to be kept in sync.
85 gfc_advance_se_ss_chain (gfc_se * se)
89 gcc_assert (se != NULL && se->ss != NULL && se->ss != gfc_ss_terminator);
92 /* Walk down the parent chain. */
95 /* Simple consistency check. */
96 gcc_assert (p->parent == NULL || p->parent->ss == p->ss);
105 /* Ensures the result of the expression as either a temporary variable
106 or a constant so that it can be used repeatedly. */
109 gfc_make_safe_expr (gfc_se * se)
113 if (CONSTANT_CLASS_P (se->expr))
116 /* We need a temporary for this result. */
117 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
118 gfc_add_modify (&se->pre, var, se->expr);
123 /* Return an expression which determines if a dummy parameter is present.
124 Also used for arguments to procedures with multiple entry points. */
127 gfc_conv_expr_present (gfc_symbol * sym)
131 gcc_assert (sym->attr.dummy);
133 decl = gfc_get_symbol_decl (sym);
134 if (TREE_CODE (decl) != PARM_DECL)
136 /* Array parameters use a temporary descriptor, we want the real
138 gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (decl))
139 || GFC_ARRAY_TYPE_P (TREE_TYPE (decl)));
140 decl = GFC_DECL_SAVED_DESCRIPTOR (decl);
142 return fold_build2 (NE_EXPR, boolean_type_node, decl,
143 fold_convert (TREE_TYPE (decl), null_pointer_node));
147 /* Converts a missing, dummy argument into a null or zero. */
150 gfc_conv_missing_dummy (gfc_se * se, gfc_expr * arg, gfc_typespec ts, int kind)
155 present = gfc_conv_expr_present (arg->symtree->n.sym);
159 /* Create a temporary and convert it to the correct type. */
160 tmp = gfc_get_int_type (kind);
161 tmp = fold_convert (tmp, build_fold_indirect_ref (se->expr));
163 /* Test for a NULL value. */
164 tmp = build3 (COND_EXPR, TREE_TYPE (tmp), present, tmp,
165 fold_convert (TREE_TYPE (tmp), integer_one_node));
166 tmp = gfc_evaluate_now (tmp, &se->pre);
167 se->expr = gfc_build_addr_expr (NULL_TREE, tmp);
171 tmp = build3 (COND_EXPR, TREE_TYPE (se->expr), present, se->expr,
172 fold_convert (TREE_TYPE (se->expr), integer_zero_node));
173 tmp = gfc_evaluate_now (tmp, &se->pre);
177 if (ts.type == BT_CHARACTER)
179 tmp = build_int_cst (gfc_charlen_type_node, 0);
180 tmp = fold_build3 (COND_EXPR, gfc_charlen_type_node,
181 present, se->string_length, tmp);
182 tmp = gfc_evaluate_now (tmp, &se->pre);
183 se->string_length = tmp;
189 /* Get the character length of an expression, looking through gfc_refs
193 gfc_get_expr_charlen (gfc_expr *e)
198 gcc_assert (e->expr_type == EXPR_VARIABLE
199 && e->ts.type == BT_CHARACTER);
201 length = NULL; /* To silence compiler warning. */
203 if (is_subref_array (e) && e->ts.cl->length)
206 gfc_init_se (&tmpse, NULL);
207 gfc_conv_expr_type (&tmpse, e->ts.cl->length, gfc_charlen_type_node);
208 e->ts.cl->backend_decl = tmpse.expr;
212 /* First candidate: if the variable is of type CHARACTER, the
213 expression's length could be the length of the character
215 if (e->symtree->n.sym->ts.type == BT_CHARACTER)
216 length = e->symtree->n.sym->ts.cl->backend_decl;
218 /* Look through the reference chain for component references. */
219 for (r = e->ref; r; r = r->next)
224 if (r->u.c.component->ts.type == BT_CHARACTER)
225 length = r->u.c.component->ts.cl->backend_decl;
233 /* We should never got substring references here. These will be
234 broken down by the scalarizer. */
240 gcc_assert (length != NULL);
245 /* For each character array constructor subexpression without a ts.cl->length,
246 replace it by its first element (if there aren't any elements, the length
247 should already be set to zero). */
250 flatten_array_ctors_without_strlen (gfc_expr* e)
252 gfc_actual_arglist* arg;
258 switch (e->expr_type)
262 flatten_array_ctors_without_strlen (e->value.op.op1);
263 flatten_array_ctors_without_strlen (e->value.op.op2);
267 /* TODO: Implement as with EXPR_FUNCTION when needed. */
271 for (arg = e->value.function.actual; arg; arg = arg->next)
272 flatten_array_ctors_without_strlen (arg->expr);
277 /* We've found what we're looking for. */
278 if (e->ts.type == BT_CHARACTER && !e->ts.cl->length)
281 gcc_assert (e->value.constructor);
283 new_expr = e->value.constructor->expr;
284 e->value.constructor->expr = NULL;
286 flatten_array_ctors_without_strlen (new_expr);
287 gfc_replace_expr (e, new_expr);
291 /* Otherwise, fall through to handle constructor elements. */
293 for (c = e->value.constructor; c; c = c->next)
294 flatten_array_ctors_without_strlen (c->expr);
304 /* Generate code to initialize a string length variable. Returns the
305 value. For array constructors, cl->length might be NULL and in this case,
306 the first element of the constructor is needed. expr is the original
307 expression so we can access it but can be NULL if this is not needed. */
310 gfc_conv_string_length (gfc_charlen * cl, gfc_expr * expr, stmtblock_t * pblock)
314 gfc_init_se (&se, NULL);
316 /* If cl->length is NULL, use gfc_conv_expr to obtain the string length but
317 "flatten" array constructors by taking their first element; all elements
318 should be the same length or a cl->length should be present. */
324 expr_flat = gfc_copy_expr (expr);
325 flatten_array_ctors_without_strlen (expr_flat);
326 gfc_resolve_expr (expr_flat);
328 gfc_conv_expr (&se, expr_flat);
329 gfc_add_block_to_block (pblock, &se.pre);
330 cl->backend_decl = convert (gfc_charlen_type_node, se.string_length);
332 gfc_free_expr (expr_flat);
336 /* Convert cl->length. */
338 gcc_assert (cl->length);
340 gfc_conv_expr_type (&se, cl->length, gfc_charlen_type_node);
341 se.expr = fold_build2 (MAX_EXPR, gfc_charlen_type_node, se.expr,
342 build_int_cst (gfc_charlen_type_node, 0));
343 gfc_add_block_to_block (pblock, &se.pre);
345 if (cl->backend_decl)
346 gfc_add_modify (pblock, cl->backend_decl, se.expr);
348 cl->backend_decl = gfc_evaluate_now (se.expr, pblock);
353 gfc_conv_substring (gfc_se * se, gfc_ref * ref, int kind,
354 const char *name, locus *where)
364 type = gfc_get_character_type (kind, ref->u.ss.length);
365 type = build_pointer_type (type);
368 gfc_init_se (&start, se);
369 gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node);
370 gfc_add_block_to_block (&se->pre, &start.pre);
372 if (integer_onep (start.expr))
373 gfc_conv_string_parameter (se);
376 /* Avoid multiple evaluation of substring start. */
377 if (!CONSTANT_CLASS_P (start.expr) && !DECL_P (start.expr))
378 start.expr = gfc_evaluate_now (start.expr, &se->pre);
380 /* Change the start of the string. */
381 if (TYPE_STRING_FLAG (TREE_TYPE (se->expr)))
384 tmp = build_fold_indirect_ref (se->expr);
385 tmp = gfc_build_array_ref (tmp, start.expr, NULL);
386 se->expr = gfc_build_addr_expr (type, tmp);
389 /* Length = end + 1 - start. */
390 gfc_init_se (&end, se);
391 if (ref->u.ss.end == NULL)
392 end.expr = se->string_length;
395 gfc_conv_expr_type (&end, ref->u.ss.end, gfc_charlen_type_node);
396 gfc_add_block_to_block (&se->pre, &end.pre);
398 if (!CONSTANT_CLASS_P (end.expr) && !DECL_P (end.expr))
399 end.expr = gfc_evaluate_now (end.expr, &se->pre);
401 if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)
403 tree nonempty = fold_build2 (LE_EXPR, boolean_type_node,
404 start.expr, end.expr);
406 /* Check lower bound. */
407 fault = fold_build2 (LT_EXPR, boolean_type_node, start.expr,
408 build_int_cst (gfc_charlen_type_node, 1));
409 fault = fold_build2 (TRUTH_ANDIF_EXPR, boolean_type_node,
412 asprintf (&msg, "Substring out of bounds: lower bound (%%ld) of '%s' "
413 "is less than one", name);
415 asprintf (&msg, "Substring out of bounds: lower bound (%%ld)"
417 gfc_trans_runtime_check (true, false, fault, &se->pre, where, msg,
418 fold_convert (long_integer_type_node,
422 /* Check upper bound. */
423 fault = fold_build2 (GT_EXPR, boolean_type_node, end.expr,
425 fault = fold_build2 (TRUTH_ANDIF_EXPR, boolean_type_node,
428 asprintf (&msg, "Substring out of bounds: upper bound (%%ld) of '%s' "
429 "exceeds string length (%%ld)", name);
431 asprintf (&msg, "Substring out of bounds: upper bound (%%ld) "
432 "exceeds string length (%%ld)");
433 gfc_trans_runtime_check (true, false, fault, &se->pre, where, msg,
434 fold_convert (long_integer_type_node, end.expr),
435 fold_convert (long_integer_type_node,
440 tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node,
441 build_int_cst (gfc_charlen_type_node, 1),
443 tmp = fold_build2 (PLUS_EXPR, gfc_charlen_type_node, end.expr, tmp);
444 tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp,
445 build_int_cst (gfc_charlen_type_node, 0));
446 se->string_length = tmp;
450 /* Convert a derived type component reference. */
453 gfc_conv_component_ref (gfc_se * se, gfc_ref * ref)
460 c = ref->u.c.component;
462 gcc_assert (c->backend_decl);
464 field = c->backend_decl;
465 gcc_assert (TREE_CODE (field) == FIELD_DECL);
467 tmp = fold_build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE);
471 if (c->ts.type == BT_CHARACTER)
473 tmp = c->ts.cl->backend_decl;
474 /* Components must always be constant length. */
475 gcc_assert (tmp && INTEGER_CST_P (tmp));
476 se->string_length = tmp;
479 if ((c->attr.pointer && c->attr.dimension == 0 && c->ts.type != BT_CHARACTER)
480 || c->attr.proc_pointer)
481 se->expr = build_fold_indirect_ref (se->expr);
485 /* This function deals with component references to components of the
486 parent type for derived type extensons. */
488 conv_parent_component_references (gfc_se * se, gfc_ref * ref)
496 c = ref->u.c.component;
498 /* Build a gfc_ref to recursively call gfc_conv_component_ref. */
499 parent.type = REF_COMPONENT;
502 parent.u.c.component = dt->components;
504 if (dt->attr.extension && dt->components)
506 /* Return if the component is not in the parent type. */
507 for (cmp = dt->components->next; cmp; cmp = cmp->next)
508 if (strcmp (c->name, cmp->name) == 0)
511 /* Otherwise build the reference and call self. */
512 gfc_conv_component_ref (se, &parent);
513 parent.u.c.sym = dt->components->ts.derived;
514 parent.u.c.component = c;
515 conv_parent_component_references (se, &parent);
519 /* Return the contents of a variable. Also handles reference/pointer
520 variables (all Fortran pointer references are implicit). */
523 gfc_conv_variable (gfc_se * se, gfc_expr * expr)
530 bool alternate_entry;
533 sym = expr->symtree->n.sym;
536 /* Check that something hasn't gone horribly wrong. */
537 gcc_assert (se->ss != gfc_ss_terminator);
538 gcc_assert (se->ss->expr == expr);
540 /* A scalarized term. We already know the descriptor. */
541 se->expr = se->ss->data.info.descriptor;
542 se->string_length = se->ss->string_length;
543 for (ref = se->ss->data.info.ref; ref; ref = ref->next)
544 if (ref->type == REF_ARRAY && ref->u.ar.type != AR_ELEMENT)
549 tree se_expr = NULL_TREE;
551 se->expr = gfc_get_symbol_decl (sym);
553 /* Deal with references to a parent results or entries by storing
554 the current_function_decl and moving to the parent_decl. */
555 return_value = sym->attr.function && sym->result == sym;
556 alternate_entry = sym->attr.function && sym->attr.entry
557 && sym->result == sym;
558 entry_master = sym->attr.result
559 && sym->ns->proc_name->attr.entry_master
560 && !gfc_return_by_reference (sym->ns->proc_name);
561 parent_decl = DECL_CONTEXT (current_function_decl);
563 if ((se->expr == parent_decl && return_value)
564 || (sym->ns && sym->ns->proc_name
566 && sym->ns->proc_name->backend_decl == parent_decl
567 && (alternate_entry || entry_master)))
572 /* Special case for assigning the return value of a function.
573 Self recursive functions must have an explicit return value. */
574 if (return_value && (se->expr == current_function_decl || parent_flag))
575 se_expr = gfc_get_fake_result_decl (sym, parent_flag);
577 /* Similarly for alternate entry points. */
578 else if (alternate_entry
579 && (sym->ns->proc_name->backend_decl == current_function_decl
582 gfc_entry_list *el = NULL;
584 for (el = sym->ns->entries; el; el = el->next)
587 se_expr = gfc_get_fake_result_decl (sym, parent_flag);
592 else if (entry_master
593 && (sym->ns->proc_name->backend_decl == current_function_decl
595 se_expr = gfc_get_fake_result_decl (sym, parent_flag);
600 /* Procedure actual arguments. */
601 else if (sym->attr.flavor == FL_PROCEDURE
602 && se->expr != current_function_decl)
604 if (!sym->attr.dummy && !sym->attr.proc_pointer)
606 gcc_assert (TREE_CODE (se->expr) == FUNCTION_DECL);
607 se->expr = gfc_build_addr_expr (NULL_TREE, se->expr);
613 /* Dereference the expression, where needed. Since characters
614 are entirely different from other types, they are treated
616 if (sym->ts.type == BT_CHARACTER)
618 /* Dereference character pointer dummy arguments
620 if ((sym->attr.pointer || sym->attr.allocatable)
622 || sym->attr.function
623 || sym->attr.result))
624 se->expr = build_fold_indirect_ref (se->expr);
627 else if (!sym->attr.value)
629 /* Dereference non-character scalar dummy arguments. */
630 if (sym->attr.dummy && !sym->attr.dimension)
631 se->expr = build_fold_indirect_ref (se->expr);
633 /* Dereference scalar hidden result. */
634 if (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX
635 && (sym->attr.function || sym->attr.result)
636 && !sym->attr.dimension && !sym->attr.pointer
637 && !sym->attr.always_explicit)
638 se->expr = build_fold_indirect_ref (se->expr);
640 /* Dereference non-character pointer variables.
641 These must be dummies, results, or scalars. */
642 if ((sym->attr.pointer || sym->attr.allocatable)
644 || sym->attr.function
646 || !sym->attr.dimension))
647 se->expr = build_fold_indirect_ref (se->expr);
653 /* For character variables, also get the length. */
654 if (sym->ts.type == BT_CHARACTER)
656 /* If the character length of an entry isn't set, get the length from
657 the master function instead. */
658 if (sym->attr.entry && !sym->ts.cl->backend_decl)
659 se->string_length = sym->ns->proc_name->ts.cl->backend_decl;
661 se->string_length = sym->ts.cl->backend_decl;
662 gcc_assert (se->string_length);
670 /* Return the descriptor if that's what we want and this is an array
671 section reference. */
672 if (se->descriptor_only && ref->u.ar.type != AR_ELEMENT)
674 /* TODO: Pointers to single elements of array sections, eg elemental subs. */
675 /* Return the descriptor for array pointers and allocations. */
677 && ref->next == NULL && (se->descriptor_only))
680 gfc_conv_array_ref (se, &ref->u.ar, sym, &expr->where);
681 /* Return a pointer to an element. */
685 if (ref->u.c.sym->attr.extension)
686 conv_parent_component_references (se, ref);
688 gfc_conv_component_ref (se, ref);
692 gfc_conv_substring (se, ref, expr->ts.kind,
693 expr->symtree->name, &expr->where);
702 /* Pointer assignment, allocation or pass by reference. Arrays are handled
704 if (se->want_pointer)
706 if (expr->ts.type == BT_CHARACTER)
707 gfc_conv_string_parameter (se);
709 se->expr = gfc_build_addr_expr (NULL_TREE, se->expr);
714 /* Unary ops are easy... Or they would be if ! was a valid op. */
717 gfc_conv_unary_op (enum tree_code code, gfc_se * se, gfc_expr * expr)
722 gcc_assert (expr->ts.type != BT_CHARACTER);
723 /* Initialize the operand. */
724 gfc_init_se (&operand, se);
725 gfc_conv_expr_val (&operand, expr->value.op.op1);
726 gfc_add_block_to_block (&se->pre, &operand.pre);
728 type = gfc_typenode_for_spec (&expr->ts);
730 /* TRUTH_NOT_EXPR is not a "true" unary operator in GCC.
731 We must convert it to a compare to 0 (e.g. EQ_EXPR (op1, 0)).
732 All other unary operators have an equivalent GIMPLE unary operator. */
733 if (code == TRUTH_NOT_EXPR)
734 se->expr = fold_build2 (EQ_EXPR, type, operand.expr,
735 build_int_cst (type, 0));
737 se->expr = fold_build1 (code, type, operand.expr);
741 /* Expand power operator to optimal multiplications when a value is raised
742 to a constant integer n. See section 4.6.3, "Evaluation of Powers" of
743 Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer
744 Programming", 3rd Edition, 1998. */
746 /* This code is mostly duplicated from expand_powi in the backend.
747 We establish the "optimal power tree" lookup table with the defined size.
748 The items in the table are the exponents used to calculate the index
749 exponents. Any integer n less than the value can get an "addition chain",
750 with the first node being one. */
751 #define POWI_TABLE_SIZE 256
753 /* The table is from builtins.c. */
754 static const unsigned char powi_table[POWI_TABLE_SIZE] =
756 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */
757 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */
758 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */
759 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */
760 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */
761 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */
762 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */
763 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */
764 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */
765 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */
766 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */
767 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */
768 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */
769 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */
770 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */
771 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */
772 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */
773 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */
774 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */
775 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */
776 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */
777 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */
778 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */
779 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */
780 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */
781 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */
782 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */
783 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */
784 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */
785 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */
786 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */
787 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */
790 /* If n is larger than lookup table's max index, we use the "window
792 #define POWI_WINDOW_SIZE 3
794 /* Recursive function to expand the power operator. The temporary
795 values are put in tmpvar. The function returns tmpvar[1] ** n. */
797 gfc_conv_powi (gfc_se * se, unsigned HOST_WIDE_INT n, tree * tmpvar)
804 if (n < POWI_TABLE_SIZE)
809 op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar);
810 op1 = gfc_conv_powi (se, powi_table[n], tmpvar);
814 digit = n & ((1 << POWI_WINDOW_SIZE) - 1);
815 op0 = gfc_conv_powi (se, n - digit, tmpvar);
816 op1 = gfc_conv_powi (se, digit, tmpvar);
820 op0 = gfc_conv_powi (se, n >> 1, tmpvar);
824 tmp = fold_build2 (MULT_EXPR, TREE_TYPE (op0), op0, op1);
825 tmp = gfc_evaluate_now (tmp, &se->pre);
827 if (n < POWI_TABLE_SIZE)
834 /* Expand lhs ** rhs. rhs is a constant integer. If it expands successfully,
835 return 1. Else return 0 and a call to runtime library functions
836 will have to be built. */
838 gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs)
843 tree vartmp[POWI_TABLE_SIZE];
845 unsigned HOST_WIDE_INT n;
848 /* If exponent is too large, we won't expand it anyway, so don't bother
849 with large integer values. */
850 if (!double_int_fits_in_shwi_p (TREE_INT_CST (rhs)))
853 m = double_int_to_shwi (TREE_INT_CST (rhs));
854 /* There's no ABS for HOST_WIDE_INT, so here we go. It also takes care
855 of the asymmetric range of the integer type. */
856 n = (unsigned HOST_WIDE_INT) (m < 0 ? -m : m);
858 type = TREE_TYPE (lhs);
859 sgn = tree_int_cst_sgn (rhs);
861 if (((FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations)
862 || optimize_size) && (m > 2 || m < -1))
868 se->expr = gfc_build_const (type, integer_one_node);
872 /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */
873 if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE))
875 tmp = fold_build2 (EQ_EXPR, boolean_type_node,
876 lhs, build_int_cst (TREE_TYPE (lhs), -1));
877 cond = fold_build2 (EQ_EXPR, boolean_type_node,
878 lhs, build_int_cst (TREE_TYPE (lhs), 1));
881 result = (lhs == 1 || lhs == -1) ? 1 : 0. */
884 tmp = fold_build2 (TRUTH_OR_EXPR, boolean_type_node, tmp, cond);
885 se->expr = fold_build3 (COND_EXPR, type,
886 tmp, build_int_cst (type, 1),
887 build_int_cst (type, 0));
891 result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */
892 tmp = fold_build3 (COND_EXPR, type, tmp, build_int_cst (type, -1),
893 build_int_cst (type, 0));
894 se->expr = fold_build3 (COND_EXPR, type,
895 cond, build_int_cst (type, 1), tmp);
899 memset (vartmp, 0, sizeof (vartmp));
903 tmp = gfc_build_const (type, integer_one_node);
904 vartmp[1] = fold_build2 (RDIV_EXPR, type, tmp, vartmp[1]);
907 se->expr = gfc_conv_powi (se, n, vartmp);
913 /* Power op (**). Constant integer exponent has special handling. */
916 gfc_conv_power_op (gfc_se * se, gfc_expr * expr)
918 tree gfc_int4_type_node;
925 gfc_init_se (&lse, se);
926 gfc_conv_expr_val (&lse, expr->value.op.op1);
927 lse.expr = gfc_evaluate_now (lse.expr, &lse.pre);
928 gfc_add_block_to_block (&se->pre, &lse.pre);
930 gfc_init_se (&rse, se);
931 gfc_conv_expr_val (&rse, expr->value.op.op2);
932 gfc_add_block_to_block (&se->pre, &rse.pre);
934 if (expr->value.op.op2->ts.type == BT_INTEGER
935 && expr->value.op.op2->expr_type == EXPR_CONSTANT)
936 if (gfc_conv_cst_int_power (se, lse.expr, rse.expr))
939 gfc_int4_type_node = gfc_get_int_type (4);
941 kind = expr->value.op.op1->ts.kind;
942 switch (expr->value.op.op2->ts.type)
945 ikind = expr->value.op.op2->ts.kind;
950 rse.expr = convert (gfc_int4_type_node, rse.expr);
972 if (expr->value.op.op1->ts.type == BT_INTEGER)
973 lse.expr = convert (gfc_int4_type_node, lse.expr);
998 switch (expr->value.op.op1->ts.type)
1001 if (kind == 3) /* Case 16 was not handled properly above. */
1003 fndecl = gfor_fndecl_math_powi[kind][ikind].integer;
1007 /* Use builtins for real ** int4. */
1013 fndecl = built_in_decls[BUILT_IN_POWIF];
1017 fndecl = built_in_decls[BUILT_IN_POWI];
1022 fndecl = built_in_decls[BUILT_IN_POWIL];
1030 fndecl = gfor_fndecl_math_powi[kind][ikind].real;
1034 fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx;
1046 fndecl = built_in_decls[BUILT_IN_POWF];
1049 fndecl = built_in_decls[BUILT_IN_POW];
1053 fndecl = built_in_decls[BUILT_IN_POWL];
1064 fndecl = built_in_decls[BUILT_IN_CPOWF];
1067 fndecl = built_in_decls[BUILT_IN_CPOW];
1071 fndecl = built_in_decls[BUILT_IN_CPOWL];
1083 se->expr = build_call_expr (fndecl, 2, lse.expr, rse.expr);
1087 /* Generate code to allocate a string temporary. */
1090 gfc_conv_string_tmp (gfc_se * se, tree type, tree len)
1095 gcc_assert (TREE_TYPE (len) == gfc_charlen_type_node);
1097 if (gfc_can_put_var_on_stack (len))
1099 /* Create a temporary variable to hold the result. */
1100 tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len,
1101 build_int_cst (gfc_charlen_type_node, 1));
1102 tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp);
1104 if (TREE_CODE (TREE_TYPE (type)) == ARRAY_TYPE)
1105 tmp = build_array_type (TREE_TYPE (TREE_TYPE (type)), tmp);
1107 tmp = build_array_type (TREE_TYPE (type), tmp);
1109 var = gfc_create_var (tmp, "str");
1110 var = gfc_build_addr_expr (type, var);
1114 /* Allocate a temporary to hold the result. */
1115 var = gfc_create_var (type, "pstr");
1116 tmp = gfc_call_malloc (&se->pre, type,
1117 fold_build2 (MULT_EXPR, TREE_TYPE (len), len,
1118 fold_convert (TREE_TYPE (len),
1119 TYPE_SIZE (type))));
1120 gfc_add_modify (&se->pre, var, tmp);
1122 /* Free the temporary afterwards. */
1123 tmp = gfc_call_free (convert (pvoid_type_node, var));
1124 gfc_add_expr_to_block (&se->post, tmp);
1131 /* Handle a string concatenation operation. A temporary will be allocated to
1135 gfc_conv_concat_op (gfc_se * se, gfc_expr * expr)
1138 tree len, type, var, tmp, fndecl;
1140 gcc_assert (expr->value.op.op1->ts.type == BT_CHARACTER
1141 && expr->value.op.op2->ts.type == BT_CHARACTER);
1142 gcc_assert (expr->value.op.op1->ts.kind == expr->value.op.op2->ts.kind);
1144 gfc_init_se (&lse, se);
1145 gfc_conv_expr (&lse, expr->value.op.op1);
1146 gfc_conv_string_parameter (&lse);
1147 gfc_init_se (&rse, se);
1148 gfc_conv_expr (&rse, expr->value.op.op2);
1149 gfc_conv_string_parameter (&rse);
1151 gfc_add_block_to_block (&se->pre, &lse.pre);
1152 gfc_add_block_to_block (&se->pre, &rse.pre);
1154 type = gfc_get_character_type (expr->ts.kind, expr->ts.cl);
1155 len = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
1156 if (len == NULL_TREE)
1158 len = fold_build2 (PLUS_EXPR, TREE_TYPE (lse.string_length),
1159 lse.string_length, rse.string_length);
1162 type = build_pointer_type (type);
1164 var = gfc_conv_string_tmp (se, type, len);
1166 /* Do the actual concatenation. */
1167 if (expr->ts.kind == 1)
1168 fndecl = gfor_fndecl_concat_string;
1169 else if (expr->ts.kind == 4)
1170 fndecl = gfor_fndecl_concat_string_char4;
1174 tmp = build_call_expr (fndecl, 6, len, var, lse.string_length, lse.expr,
1175 rse.string_length, rse.expr);
1176 gfc_add_expr_to_block (&se->pre, tmp);
1178 /* Add the cleanup for the operands. */
1179 gfc_add_block_to_block (&se->pre, &rse.post);
1180 gfc_add_block_to_block (&se->pre, &lse.post);
1183 se->string_length = len;
1186 /* Translates an op expression. Common (binary) cases are handled by this
1187 function, others are passed on. Recursion is used in either case.
1188 We use the fact that (op1.ts == op2.ts) (except for the power
1190 Operators need no special handling for scalarized expressions as long as
1191 they call gfc_conv_simple_val to get their operands.
1192 Character strings get special handling. */
1195 gfc_conv_expr_op (gfc_se * se, gfc_expr * expr)
1197 enum tree_code code;
1206 switch (expr->value.op.op)
1208 case INTRINSIC_PARENTHESES:
1209 if (expr->ts.type == BT_REAL
1210 || expr->ts.type == BT_COMPLEX)
1212 gfc_conv_unary_op (PAREN_EXPR, se, expr);
1213 gcc_assert (FLOAT_TYPE_P (TREE_TYPE (se->expr)));
1218 case INTRINSIC_UPLUS:
1219 gfc_conv_expr (se, expr->value.op.op1);
1222 case INTRINSIC_UMINUS:
1223 gfc_conv_unary_op (NEGATE_EXPR, se, expr);
1227 gfc_conv_unary_op (TRUTH_NOT_EXPR, se, expr);
1230 case INTRINSIC_PLUS:
1234 case INTRINSIC_MINUS:
1238 case INTRINSIC_TIMES:
1242 case INTRINSIC_DIVIDE:
1243 /* If expr is a real or complex expr, use an RDIV_EXPR. If op1 is
1244 an integer, we must round towards zero, so we use a
1246 if (expr->ts.type == BT_INTEGER)
1247 code = TRUNC_DIV_EXPR;
1252 case INTRINSIC_POWER:
1253 gfc_conv_power_op (se, expr);
1256 case INTRINSIC_CONCAT:
1257 gfc_conv_concat_op (se, expr);
1261 code = TRUTH_ANDIF_EXPR;
1266 code = TRUTH_ORIF_EXPR;
1270 /* EQV and NEQV only work on logicals, but since we represent them
1271 as integers, we can use EQ_EXPR and NE_EXPR for them in GIMPLE. */
1273 case INTRINSIC_EQ_OS:
1281 case INTRINSIC_NE_OS:
1282 case INTRINSIC_NEQV:
1289 case INTRINSIC_GT_OS:
1296 case INTRINSIC_GE_OS:
1303 case INTRINSIC_LT_OS:
1310 case INTRINSIC_LE_OS:
1316 case INTRINSIC_USER:
1317 case INTRINSIC_ASSIGN:
1318 /* These should be converted into function calls by the frontend. */
1322 fatal_error ("Unknown intrinsic op");
1326 /* The only exception to this is **, which is handled separately anyway. */
1327 gcc_assert (expr->value.op.op1->ts.type == expr->value.op.op2->ts.type);
1329 if (checkstring && expr->value.op.op1->ts.type != BT_CHARACTER)
1333 gfc_init_se (&lse, se);
1334 gfc_conv_expr (&lse, expr->value.op.op1);
1335 gfc_add_block_to_block (&se->pre, &lse.pre);
1338 gfc_init_se (&rse, se);
1339 gfc_conv_expr (&rse, expr->value.op.op2);
1340 gfc_add_block_to_block (&se->pre, &rse.pre);
1344 gfc_conv_string_parameter (&lse);
1345 gfc_conv_string_parameter (&rse);
1347 lse.expr = gfc_build_compare_string (lse.string_length, lse.expr,
1348 rse.string_length, rse.expr,
1349 expr->value.op.op1->ts.kind);
1350 rse.expr = build_int_cst (TREE_TYPE (lse.expr), 0);
1351 gfc_add_block_to_block (&lse.post, &rse.post);
1354 type = gfc_typenode_for_spec (&expr->ts);
1358 /* The result of logical ops is always boolean_type_node. */
1359 tmp = fold_build2 (code, boolean_type_node, lse.expr, rse.expr);
1360 se->expr = convert (type, tmp);
1363 se->expr = fold_build2 (code, type, lse.expr, rse.expr);
1365 /* Add the post blocks. */
1366 gfc_add_block_to_block (&se->post, &rse.post);
1367 gfc_add_block_to_block (&se->post, &lse.post);
1370 /* If a string's length is one, we convert it to a single character. */
1373 string_to_single_character (tree len, tree str, int kind)
1375 gcc_assert (POINTER_TYPE_P (TREE_TYPE (str)));
1377 if (INTEGER_CST_P (len) && TREE_INT_CST_LOW (len) == 1
1378 && TREE_INT_CST_HIGH (len) == 0)
1380 str = fold_convert (gfc_get_pchar_type (kind), str);
1381 return build_fold_indirect_ref (str);
1389 gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr)
1392 if (sym->backend_decl)
1394 /* This becomes the nominal_type in
1395 function.c:assign_parm_find_data_types. */
1396 TREE_TYPE (sym->backend_decl) = unsigned_char_type_node;
1397 /* This becomes the passed_type in
1398 function.c:assign_parm_find_data_types. C promotes char to
1399 integer for argument passing. */
1400 DECL_ARG_TYPE (sym->backend_decl) = unsigned_type_node;
1402 DECL_BY_REFERENCE (sym->backend_decl) = 0;
1407 /* If we have a constant character expression, make it into an
1409 if ((*expr)->expr_type == EXPR_CONSTANT)
1414 *expr = gfc_int_expr ((int)(*expr)->value.character.string[0]);
1415 if ((*expr)->ts.kind != gfc_c_int_kind)
1417 /* The expr needs to be compatible with a C int. If the
1418 conversion fails, then the 2 causes an ICE. */
1419 ts.type = BT_INTEGER;
1420 ts.kind = gfc_c_int_kind;
1421 gfc_convert_type (*expr, &ts, 2);
1424 else if (se != NULL && (*expr)->expr_type == EXPR_VARIABLE)
1426 if ((*expr)->ref == NULL)
1428 se->expr = string_to_single_character
1429 (build_int_cst (integer_type_node, 1),
1430 gfc_build_addr_expr (gfc_get_pchar_type ((*expr)->ts.kind),
1432 ((*expr)->symtree->n.sym)),
1437 gfc_conv_variable (se, *expr);
1438 se->expr = string_to_single_character
1439 (build_int_cst (integer_type_node, 1),
1440 gfc_build_addr_expr (gfc_get_pchar_type ((*expr)->ts.kind),
1449 /* Compare two strings. If they are all single characters, the result is the
1450 subtraction of them. Otherwise, we build a library call. */
1453 gfc_build_compare_string (tree len1, tree str1, tree len2, tree str2, int kind)
1459 gcc_assert (POINTER_TYPE_P (TREE_TYPE (str1)));
1460 gcc_assert (POINTER_TYPE_P (TREE_TYPE (str2)));
1462 sc1 = string_to_single_character (len1, str1, kind);
1463 sc2 = string_to_single_character (len2, str2, kind);
1465 if (sc1 != NULL_TREE && sc2 != NULL_TREE)
1467 /* Deal with single character specially. */
1468 sc1 = fold_convert (integer_type_node, sc1);
1469 sc2 = fold_convert (integer_type_node, sc2);
1470 tmp = fold_build2 (MINUS_EXPR, integer_type_node, sc1, sc2);
1474 /* Build a call for the comparison. */
1478 fndecl = gfor_fndecl_compare_string;
1480 fndecl = gfor_fndecl_compare_string_char4;
1484 tmp = build_call_expr (fndecl, 4, len1, str1, len2, str2);
1491 conv_function_val (gfc_se * se, gfc_symbol * sym, gfc_expr * expr)
1495 if (is_proc_ptr_comp (expr, NULL))
1496 tmp = gfc_get_proc_ptr_comp (se, expr);
1497 else if (sym->attr.dummy)
1499 tmp = gfc_get_symbol_decl (sym);
1500 if (sym->attr.proc_pointer)
1501 tmp = build_fold_indirect_ref (tmp);
1502 gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE
1503 && TREE_CODE (TREE_TYPE (TREE_TYPE (tmp))) == FUNCTION_TYPE);
1507 if (!sym->backend_decl)
1508 sym->backend_decl = gfc_get_extern_function_decl (sym);
1510 tmp = sym->backend_decl;
1512 if (sym->attr.cray_pointee)
1514 /* TODO - make the cray pointee a pointer to a procedure,
1515 assign the pointer to it and use it for the call. This
1517 tmp = convert (build_pointer_type (TREE_TYPE (tmp)),
1518 gfc_get_symbol_decl (sym->cp_pointer));
1519 tmp = gfc_evaluate_now (tmp, &se->pre);
1522 if (!POINTER_TYPE_P (TREE_TYPE (tmp)))
1524 gcc_assert (TREE_CODE (tmp) == FUNCTION_DECL);
1525 tmp = gfc_build_addr_expr (NULL_TREE, tmp);
1532 /* Initialize MAPPING. */
1535 gfc_init_interface_mapping (gfc_interface_mapping * mapping)
1537 mapping->syms = NULL;
1538 mapping->charlens = NULL;
1542 /* Free all memory held by MAPPING (but not MAPPING itself). */
1545 gfc_free_interface_mapping (gfc_interface_mapping * mapping)
1547 gfc_interface_sym_mapping *sym;
1548 gfc_interface_sym_mapping *nextsym;
1550 gfc_charlen *nextcl;
1552 for (sym = mapping->syms; sym; sym = nextsym)
1554 nextsym = sym->next;
1555 sym->new_sym->n.sym->formal = NULL;
1556 gfc_free_symbol (sym->new_sym->n.sym);
1557 gfc_free_expr (sym->expr);
1558 gfc_free (sym->new_sym);
1561 for (cl = mapping->charlens; cl; cl = nextcl)
1564 gfc_free_expr (cl->length);
1570 /* Return a copy of gfc_charlen CL. Add the returned structure to
1571 MAPPING so that it will be freed by gfc_free_interface_mapping. */
1573 static gfc_charlen *
1574 gfc_get_interface_mapping_charlen (gfc_interface_mapping * mapping,
1577 gfc_charlen *new_charlen;
1579 new_charlen = gfc_get_charlen ();
1580 new_charlen->next = mapping->charlens;
1581 new_charlen->length = gfc_copy_expr (cl->length);
1583 mapping->charlens = new_charlen;
1588 /* A subroutine of gfc_add_interface_mapping. Return a descriptorless
1589 array variable that can be used as the actual argument for dummy
1590 argument SYM. Add any initialization code to BLOCK. PACKED is as
1591 for gfc_get_nodesc_array_type and DATA points to the first element
1592 in the passed array. */
1595 gfc_get_interface_mapping_array (stmtblock_t * block, gfc_symbol * sym,
1596 gfc_packed packed, tree data)
1601 type = gfc_typenode_for_spec (&sym->ts);
1602 type = gfc_get_nodesc_array_type (type, sym->as, packed);
1604 var = gfc_create_var (type, "ifm");
1605 gfc_add_modify (block, var, fold_convert (type, data));
1611 /* A subroutine of gfc_add_interface_mapping. Set the stride, upper bounds
1612 and offset of descriptorless array type TYPE given that it has the same
1613 size as DESC. Add any set-up code to BLOCK. */
1616 gfc_set_interface_mapping_bounds (stmtblock_t * block, tree type, tree desc)
1623 offset = gfc_index_zero_node;
1624 for (n = 0; n < GFC_TYPE_ARRAY_RANK (type); n++)
1626 dim = gfc_rank_cst[n];
1627 GFC_TYPE_ARRAY_STRIDE (type, n) = gfc_conv_array_stride (desc, n);
1628 if (GFC_TYPE_ARRAY_LBOUND (type, n) == NULL_TREE)
1630 GFC_TYPE_ARRAY_LBOUND (type, n)
1631 = gfc_conv_descriptor_lbound (desc, dim);
1632 GFC_TYPE_ARRAY_UBOUND (type, n)
1633 = gfc_conv_descriptor_ubound (desc, dim);
1635 else if (GFC_TYPE_ARRAY_UBOUND (type, n) == NULL_TREE)
1637 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type,
1638 gfc_conv_descriptor_ubound (desc, dim),
1639 gfc_conv_descriptor_lbound (desc, dim));
1640 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type,
1641 GFC_TYPE_ARRAY_LBOUND (type, n),
1643 tmp = gfc_evaluate_now (tmp, block);
1644 GFC_TYPE_ARRAY_UBOUND (type, n) = tmp;
1646 tmp = fold_build2 (MULT_EXPR, gfc_array_index_type,
1647 GFC_TYPE_ARRAY_LBOUND (type, n),
1648 GFC_TYPE_ARRAY_STRIDE (type, n));
1649 offset = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp);
1651 offset = gfc_evaluate_now (offset, block);
1652 GFC_TYPE_ARRAY_OFFSET (type) = offset;
1656 /* Extend MAPPING so that it maps dummy argument SYM to the value stored
1657 in SE. The caller may still use se->expr and se->string_length after
1658 calling this function. */
1661 gfc_add_interface_mapping (gfc_interface_mapping * mapping,
1662 gfc_symbol * sym, gfc_se * se,
1665 gfc_interface_sym_mapping *sm;
1669 gfc_symbol *new_sym;
1671 gfc_symtree *new_symtree;
1673 /* Create a new symbol to represent the actual argument. */
1674 new_sym = gfc_new_symbol (sym->name, NULL);
1675 new_sym->ts = sym->ts;
1676 new_sym->as = gfc_copy_array_spec (sym->as);
1677 new_sym->attr.referenced = 1;
1678 new_sym->attr.dimension = sym->attr.dimension;
1679 new_sym->attr.pointer = sym->attr.pointer;
1680 new_sym->attr.allocatable = sym->attr.allocatable;
1681 new_sym->attr.flavor = sym->attr.flavor;
1682 new_sym->attr.function = sym->attr.function;
1684 /* Ensure that the interface is available and that
1685 descriptors are passed for array actual arguments. */
1686 if (sym->attr.flavor == FL_PROCEDURE)
1688 new_sym->formal = expr->symtree->n.sym->formal;
1689 new_sym->attr.always_explicit
1690 = expr->symtree->n.sym->attr.always_explicit;
1693 /* Create a fake symtree for it. */
1695 new_symtree = gfc_new_symtree (&root, sym->name);
1696 new_symtree->n.sym = new_sym;
1697 gcc_assert (new_symtree == root);
1699 /* Create a dummy->actual mapping. */
1700 sm = XCNEW (gfc_interface_sym_mapping);
1701 sm->next = mapping->syms;
1703 sm->new_sym = new_symtree;
1704 sm->expr = gfc_copy_expr (expr);
1707 /* Stabilize the argument's value. */
1708 if (!sym->attr.function && se)
1709 se->expr = gfc_evaluate_now (se->expr, &se->pre);
1711 if (sym->ts.type == BT_CHARACTER)
1713 /* Create a copy of the dummy argument's length. */
1714 new_sym->ts.cl = gfc_get_interface_mapping_charlen (mapping, sym->ts.cl);
1715 sm->expr->ts.cl = new_sym->ts.cl;
1717 /* If the length is specified as "*", record the length that
1718 the caller is passing. We should use the callee's length
1719 in all other cases. */
1720 if (!new_sym->ts.cl->length && se)
1722 se->string_length = gfc_evaluate_now (se->string_length, &se->pre);
1723 new_sym->ts.cl->backend_decl = se->string_length;
1730 /* Use the passed value as-is if the argument is a function. */
1731 if (sym->attr.flavor == FL_PROCEDURE)
1734 /* If the argument is either a string or a pointer to a string,
1735 convert it to a boundless character type. */
1736 else if (!sym->attr.dimension && sym->ts.type == BT_CHARACTER)
1738 tmp = gfc_get_character_type_len (sym->ts.kind, NULL);
1739 tmp = build_pointer_type (tmp);
1740 if (sym->attr.pointer)
1741 value = build_fold_indirect_ref (se->expr);
1744 value = fold_convert (tmp, value);
1747 /* If the argument is a scalar, a pointer to an array or an allocatable,
1749 else if (!sym->attr.dimension || sym->attr.pointer || sym->attr.allocatable)
1750 value = build_fold_indirect_ref (se->expr);
1752 /* For character(*), use the actual argument's descriptor. */
1753 else if (sym->ts.type == BT_CHARACTER && !new_sym->ts.cl->length)
1754 value = build_fold_indirect_ref (se->expr);
1756 /* If the argument is an array descriptor, use it to determine
1757 information about the actual argument's shape. */
1758 else if (POINTER_TYPE_P (TREE_TYPE (se->expr))
1759 && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se->expr))))
1761 /* Get the actual argument's descriptor. */
1762 desc = build_fold_indirect_ref (se->expr);
1764 /* Create the replacement variable. */
1765 tmp = gfc_conv_descriptor_data_get (desc);
1766 value = gfc_get_interface_mapping_array (&se->pre, sym,
1769 /* Use DESC to work out the upper bounds, strides and offset. */
1770 gfc_set_interface_mapping_bounds (&se->pre, TREE_TYPE (value), desc);
1773 /* Otherwise we have a packed array. */
1774 value = gfc_get_interface_mapping_array (&se->pre, sym,
1775 PACKED_FULL, se->expr);
1777 new_sym->backend_decl = value;
1781 /* Called once all dummy argument mappings have been added to MAPPING,
1782 but before the mapping is used to evaluate expressions. Pre-evaluate
1783 the length of each argument, adding any initialization code to PRE and
1784 any finalization code to POST. */
1787 gfc_finish_interface_mapping (gfc_interface_mapping * mapping,
1788 stmtblock_t * pre, stmtblock_t * post)
1790 gfc_interface_sym_mapping *sym;
1794 for (sym = mapping->syms; sym; sym = sym->next)
1795 if (sym->new_sym->n.sym->ts.type == BT_CHARACTER
1796 && !sym->new_sym->n.sym->ts.cl->backend_decl)
1798 expr = sym->new_sym->n.sym->ts.cl->length;
1799 gfc_apply_interface_mapping_to_expr (mapping, expr);
1800 gfc_init_se (&se, NULL);
1801 gfc_conv_expr (&se, expr);
1802 se.expr = fold_convert (gfc_charlen_type_node, se.expr);
1803 se.expr = gfc_evaluate_now (se.expr, &se.pre);
1804 gfc_add_block_to_block (pre, &se.pre);
1805 gfc_add_block_to_block (post, &se.post);
1807 sym->new_sym->n.sym->ts.cl->backend_decl = se.expr;
1812 /* Like gfc_apply_interface_mapping_to_expr, but applied to
1816 gfc_apply_interface_mapping_to_cons (gfc_interface_mapping * mapping,
1817 gfc_constructor * c)
1819 for (; c; c = c->next)
1821 gfc_apply_interface_mapping_to_expr (mapping, c->expr);
1824 gfc_apply_interface_mapping_to_expr (mapping, c->iterator->start);
1825 gfc_apply_interface_mapping_to_expr (mapping, c->iterator->end);
1826 gfc_apply_interface_mapping_to_expr (mapping, c->iterator->step);
1832 /* Like gfc_apply_interface_mapping_to_expr, but applied to
1836 gfc_apply_interface_mapping_to_ref (gfc_interface_mapping * mapping,
1841 for (; ref; ref = ref->next)
1845 for (n = 0; n < ref->u.ar.dimen; n++)
1847 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.start[n]);
1848 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.end[n]);
1849 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.stride[n]);
1851 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.offset);
1858 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.start);
1859 gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.end);
1865 /* Convert intrinsic function calls into result expressions. */
1868 gfc_map_intrinsic_function (gfc_expr *expr, gfc_interface_mapping *mapping)
1876 arg1 = expr->value.function.actual->expr;
1877 if (expr->value.function.actual->next)
1878 arg2 = expr->value.function.actual->next->expr;
1882 sym = arg1->symtree->n.sym;
1884 if (sym->attr.dummy)
1889 switch (expr->value.function.isym->id)
1892 /* TODO figure out why this condition is necessary. */
1893 if (sym->attr.function
1894 && (arg1->ts.cl->length == NULL
1895 || (arg1->ts.cl->length->expr_type != EXPR_CONSTANT
1896 && arg1->ts.cl->length->expr_type != EXPR_VARIABLE)))
1899 new_expr = gfc_copy_expr (arg1->ts.cl->length);
1906 if (arg2 && arg2->expr_type == EXPR_CONSTANT)
1908 dup = mpz_get_si (arg2->value.integer);
1913 dup = sym->as->rank;
1917 for (; d < dup; d++)
1921 if (!sym->as->upper[d] || !sym->as->lower[d])
1923 gfc_free_expr (new_expr);
1927 tmp = gfc_add (gfc_copy_expr (sym->as->upper[d]), gfc_int_expr (1));
1928 tmp = gfc_subtract (tmp, gfc_copy_expr (sym->as->lower[d]));
1930 new_expr = gfc_multiply (new_expr, tmp);
1936 case GFC_ISYM_LBOUND:
1937 case GFC_ISYM_UBOUND:
1938 /* TODO These implementations of lbound and ubound do not limit if
1939 the size < 0, according to F95's 13.14.53 and 13.14.113. */
1944 if (arg2 && arg2->expr_type == EXPR_CONSTANT)
1945 d = mpz_get_si (arg2->value.integer) - 1;
1947 /* TODO: If the need arises, this could produce an array of
1951 if (expr->value.function.isym->id == GFC_ISYM_LBOUND)
1953 if (sym->as->lower[d])
1954 new_expr = gfc_copy_expr (sym->as->lower[d]);
1958 if (sym->as->upper[d])
1959 new_expr = gfc_copy_expr (sym->as->upper[d]);
1967 gfc_apply_interface_mapping_to_expr (mapping, new_expr);
1971 gfc_replace_expr (expr, new_expr);
1977 gfc_map_fcn_formal_to_actual (gfc_expr *expr, gfc_expr *map_expr,
1978 gfc_interface_mapping * mapping)
1980 gfc_formal_arglist *f;
1981 gfc_actual_arglist *actual;
1983 actual = expr->value.function.actual;
1984 f = map_expr->symtree->n.sym->formal;
1986 for (; f && actual; f = f->next, actual = actual->next)
1991 gfc_add_interface_mapping (mapping, f->sym, NULL, actual->expr);
1994 if (map_expr->symtree->n.sym->attr.dimension)
1999 as = gfc_copy_array_spec (map_expr->symtree->n.sym->as);
2001 for (d = 0; d < as->rank; d++)
2003 gfc_apply_interface_mapping_to_expr (mapping, as->lower[d]);
2004 gfc_apply_interface_mapping_to_expr (mapping, as->upper[d]);
2007 expr->value.function.esym->as = as;
2010 if (map_expr->symtree->n.sym->ts.type == BT_CHARACTER)
2012 expr->value.function.esym->ts.cl->length
2013 = gfc_copy_expr (map_expr->symtree->n.sym->ts.cl->length);
2015 gfc_apply_interface_mapping_to_expr (mapping,
2016 expr->value.function.esym->ts.cl->length);
2021 /* EXPR is a copy of an expression that appeared in the interface
2022 associated with MAPPING. Walk it recursively looking for references to
2023 dummy arguments that MAPPING maps to actual arguments. Replace each such
2024 reference with a reference to the associated actual argument. */
2027 gfc_apply_interface_mapping_to_expr (gfc_interface_mapping * mapping,
2030 gfc_interface_sym_mapping *sym;
2031 gfc_actual_arglist *actual;
2036 /* Copying an expression does not copy its length, so do that here. */
2037 if (expr->ts.type == BT_CHARACTER && expr->ts.cl)
2039 expr->ts.cl = gfc_get_interface_mapping_charlen (mapping, expr->ts.cl);
2040 gfc_apply_interface_mapping_to_expr (mapping, expr->ts.cl->length);
2043 /* Apply the mapping to any references. */
2044 gfc_apply_interface_mapping_to_ref (mapping, expr->ref);
2046 /* ...and to the expression's symbol, if it has one. */
2047 /* TODO Find out why the condition on expr->symtree had to be moved into
2048 the loop rather than being outside it, as originally. */
2049 for (sym = mapping->syms; sym; sym = sym->next)
2050 if (expr->symtree && sym->old == expr->symtree->n.sym)
2052 if (sym->new_sym->n.sym->backend_decl)
2053 expr->symtree = sym->new_sym;
2055 gfc_replace_expr (expr, gfc_copy_expr (sym->expr));
2058 /* ...and to subexpressions in expr->value. */
2059 switch (expr->expr_type)
2064 case EXPR_SUBSTRING:
2068 gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op1);
2069 gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op2);
2073 for (actual = expr->value.function.actual; actual; actual = actual->next)
2074 gfc_apply_interface_mapping_to_expr (mapping, actual->expr);
2076 if (expr->value.function.esym == NULL
2077 && expr->value.function.isym != NULL
2078 && expr->value.function.actual->expr->symtree
2079 && gfc_map_intrinsic_function (expr, mapping))
2082 for (sym = mapping->syms; sym; sym = sym->next)
2083 if (sym->old == expr->value.function.esym)
2085 expr->value.function.esym = sym->new_sym->n.sym;
2086 gfc_map_fcn_formal_to_actual (expr, sym->expr, mapping);
2087 expr->value.function.esym->result = sym->new_sym->n.sym;
2092 case EXPR_STRUCTURE:
2093 gfc_apply_interface_mapping_to_cons (mapping, expr->value.constructor);
2106 /* Evaluate interface expression EXPR using MAPPING. Store the result
2110 gfc_apply_interface_mapping (gfc_interface_mapping * mapping,
2111 gfc_se * se, gfc_expr * expr)
2113 expr = gfc_copy_expr (expr);
2114 gfc_apply_interface_mapping_to_expr (mapping, expr);
2115 gfc_conv_expr (se, expr);
2116 se->expr = gfc_evaluate_now (se->expr, &se->pre);
2117 gfc_free_expr (expr);
2121 /* Returns a reference to a temporary array into which a component of
2122 an actual argument derived type array is copied and then returned
2123 after the function call. */
2125 gfc_conv_subref_array_arg (gfc_se * parmse, gfc_expr * expr,
2126 int g77, sym_intent intent)
2142 gcc_assert (expr->expr_type == EXPR_VARIABLE);
2144 gfc_init_se (&lse, NULL);
2145 gfc_init_se (&rse, NULL);
2147 /* Walk the argument expression. */
2148 rss = gfc_walk_expr (expr);
2150 gcc_assert (rss != gfc_ss_terminator);
2152 /* Initialize the scalarizer. */
2153 gfc_init_loopinfo (&loop);
2154 gfc_add_ss_to_loop (&loop, rss);
2156 /* Calculate the bounds of the scalarization. */
2157 gfc_conv_ss_startstride (&loop);
2159 /* Build an ss for the temporary. */
2160 if (expr->ts.type == BT_CHARACTER && !expr->ts.cl->backend_decl)
2161 gfc_conv_string_length (expr->ts.cl, expr, &parmse->pre);
2163 base_type = gfc_typenode_for_spec (&expr->ts);
2164 if (GFC_ARRAY_TYPE_P (base_type)
2165 || GFC_DESCRIPTOR_TYPE_P (base_type))
2166 base_type = gfc_get_element_type (base_type);
2168 loop.temp_ss = gfc_get_ss ();;
2169 loop.temp_ss->type = GFC_SS_TEMP;
2170 loop.temp_ss->data.temp.type = base_type;
2172 if (expr->ts.type == BT_CHARACTER)
2173 loop.temp_ss->string_length = expr->ts.cl->backend_decl;
2175 loop.temp_ss->string_length = NULL;
2177 parmse->string_length = loop.temp_ss->string_length;
2178 loop.temp_ss->data.temp.dimen = loop.dimen;
2179 loop.temp_ss->next = gfc_ss_terminator;
2181 /* Associate the SS with the loop. */
2182 gfc_add_ss_to_loop (&loop, loop.temp_ss);
2184 /* Setup the scalarizing loops. */
2185 gfc_conv_loop_setup (&loop, &expr->where);
2187 /* Pass the temporary descriptor back to the caller. */
2188 info = &loop.temp_ss->data.info;
2189 parmse->expr = info->descriptor;
2191 /* Setup the gfc_se structures. */
2192 gfc_copy_loopinfo_to_se (&lse, &loop);
2193 gfc_copy_loopinfo_to_se (&rse, &loop);
2196 lse.ss = loop.temp_ss;
2197 gfc_mark_ss_chain_used (rss, 1);
2198 gfc_mark_ss_chain_used (loop.temp_ss, 1);
2200 /* Start the scalarized loop body. */
2201 gfc_start_scalarized_body (&loop, &body);
2203 /* Translate the expression. */
2204 gfc_conv_expr (&rse, expr);
2206 gfc_conv_tmp_array_ref (&lse);
2207 gfc_advance_se_ss_chain (&lse);
2209 if (intent != INTENT_OUT)
2211 tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, true, false);
2212 gfc_add_expr_to_block (&body, tmp);
2213 gcc_assert (rse.ss == gfc_ss_terminator);
2214 gfc_trans_scalarizing_loops (&loop, &body);
2218 /* Make sure that the temporary declaration survives by merging
2219 all the loop declarations into the current context. */
2220 for (n = 0; n < loop.dimen; n++)
2222 gfc_merge_block_scope (&body);
2223 body = loop.code[loop.order[n]];
2225 gfc_merge_block_scope (&body);
2228 /* Add the post block after the second loop, so that any
2229 freeing of allocated memory is done at the right time. */
2230 gfc_add_block_to_block (&parmse->pre, &loop.pre);
2232 /**********Copy the temporary back again.*********/
2234 gfc_init_se (&lse, NULL);
2235 gfc_init_se (&rse, NULL);
2237 /* Walk the argument expression. */
2238 lss = gfc_walk_expr (expr);
2239 rse.ss = loop.temp_ss;
2242 /* Initialize the scalarizer. */
2243 gfc_init_loopinfo (&loop2);
2244 gfc_add_ss_to_loop (&loop2, lss);
2246 /* Calculate the bounds of the scalarization. */
2247 gfc_conv_ss_startstride (&loop2);
2249 /* Setup the scalarizing loops. */
2250 gfc_conv_loop_setup (&loop2, &expr->where);
2252 gfc_copy_loopinfo_to_se (&lse, &loop2);
2253 gfc_copy_loopinfo_to_se (&rse, &loop2);
2255 gfc_mark_ss_chain_used (lss, 1);
2256 gfc_mark_ss_chain_used (loop.temp_ss, 1);
2258 /* Declare the variable to hold the temporary offset and start the
2259 scalarized loop body. */
2260 offset = gfc_create_var (gfc_array_index_type, NULL);
2261 gfc_start_scalarized_body (&loop2, &body);
2263 /* Build the offsets for the temporary from the loop variables. The
2264 temporary array has lbounds of zero and strides of one in all
2265 dimensions, so this is very simple. The offset is only computed
2266 outside the innermost loop, so the overall transfer could be
2267 optimized further. */
2268 info = &rse.ss->data.info;
2270 tmp_index = gfc_index_zero_node;
2271 for (n = info->dimen - 1; n > 0; n--)
2274 tmp = rse.loop->loopvar[n];
2275 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type,
2276 tmp, rse.loop->from[n]);
2277 tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type,
2280 tmp_str = fold_build2 (MINUS_EXPR, gfc_array_index_type,
2281 rse.loop->to[n-1], rse.loop->from[n-1]);
2282 tmp_str = fold_build2 (PLUS_EXPR, gfc_array_index_type,
2283 tmp_str, gfc_index_one_node);
2285 tmp_index = fold_build2 (MULT_EXPR, gfc_array_index_type,
2289 tmp_index = fold_build2 (MINUS_EXPR, gfc_array_index_type,
2290 tmp_index, rse.loop->from[0]);
2291 gfc_add_modify (&rse.loop->code[0], offset, tmp_index);
2293 tmp_index = fold_build2 (PLUS_EXPR, gfc_array_index_type,
2294 rse.loop->loopvar[0], offset);
2296 /* Now use the offset for the reference. */
2297 tmp = build_fold_indirect_ref (info->data);
2298 rse.expr = gfc_build_array_ref (tmp, tmp_index, NULL);
2300 if (expr->ts.type == BT_CHARACTER)
2301 rse.string_length = expr->ts.cl->backend_decl;
2303 gfc_conv_expr (&lse, expr);
2305 gcc_assert (lse.ss == gfc_ss_terminator);
2307 tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, false, false);
2308 gfc_add_expr_to_block (&body, tmp);
2310 /* Generate the copying loops. */
2311 gfc_trans_scalarizing_loops (&loop2, &body);
2313 /* Wrap the whole thing up by adding the second loop to the post-block
2314 and following it by the post-block of the first loop. In this way,
2315 if the temporary needs freeing, it is done after use! */
2316 if (intent != INTENT_IN)
2318 gfc_add_block_to_block (&parmse->post, &loop2.pre);
2319 gfc_add_block_to_block (&parmse->post, &loop2.post);
2322 gfc_add_block_to_block (&parmse->post, &loop.post);
2324 gfc_cleanup_loop (&loop);
2325 gfc_cleanup_loop (&loop2);
2327 /* Pass the string length to the argument expression. */
2328 if (expr->ts.type == BT_CHARACTER)
2329 parmse->string_length = expr->ts.cl->backend_decl;
2331 /* We want either the address for the data or the address of the descriptor,
2332 depending on the mode of passing array arguments. */
2334 parmse->expr = gfc_conv_descriptor_data_get (parmse->expr);
2336 parmse->expr = gfc_build_addr_expr (NULL_TREE, parmse->expr);
2342 /* Generate the code for argument list functions. */
2345 conv_arglist_function (gfc_se *se, gfc_expr *expr, const char *name)
2347 /* Pass by value for g77 %VAL(arg), pass the address
2348 indirectly for %LOC, else by reference. Thus %REF
2349 is a "do-nothing" and %LOC is the same as an F95
2351 if (strncmp (name, "%VAL", 4) == 0)
2352 gfc_conv_expr (se, expr);
2353 else if (strncmp (name, "%LOC", 4) == 0)
2355 gfc_conv_expr_reference (se, expr);
2356 se->expr = gfc_build_addr_expr (NULL, se->expr);
2358 else if (strncmp (name, "%REF", 4) == 0)
2359 gfc_conv_expr_reference (se, expr);
2361 gfc_error ("Unknown argument list function at %L", &expr->where);
2365 /* Generate code for a procedure call. Note can return se->post != NULL.
2366 If se->direct_byref is set then se->expr contains the return parameter.
2367 Return nonzero, if the call has alternate specifiers.
2368 'expr' is only needed for procedure pointer components. */
2371 gfc_conv_procedure_call (gfc_se * se, gfc_symbol * sym,
2372 gfc_actual_arglist * arg, gfc_expr * expr,
2375 gfc_interface_mapping mapping;
2389 gfc_formal_arglist *formal;
2390 int has_alternate_specifier = 0;
2391 bool need_interface_mapping;
2398 enum {MISSING = 0, ELEMENTAL, SCALAR, SCALAR_POINTER, ARRAY};
2399 gfc_component *comp = NULL;
2401 arglist = NULL_TREE;
2402 retargs = NULL_TREE;
2403 stringargs = NULL_TREE;
2408 if (sym->from_intmod == INTMOD_ISO_C_BINDING)
2410 if (sym->intmod_sym_id == ISOCBINDING_LOC)
2412 if (arg->expr->rank == 0)
2413 gfc_conv_expr_reference (se, arg->expr);
2417 /* This is really the actual arg because no formal arglist is
2418 created for C_LOC. */
2419 fsym = arg->expr->symtree->n.sym;
2421 /* We should want it to do g77 calling convention. */
2423 && !(fsym->attr.pointer || fsym->attr.allocatable)
2424 && fsym->as->type != AS_ASSUMED_SHAPE;
2425 f = f || !sym->attr.always_explicit;
2427 argss = gfc_walk_expr (arg->expr);
2428 gfc_conv_array_parameter (se, arg->expr, argss, f,
2432 /* TODO -- the following two lines shouldn't be necessary, but
2433 they're removed a bug is exposed later in the codepath.
2434 This is workaround was thus introduced, but will have to be
2435 removed; please see PR 35150 for details about the issue. */
2436 se->expr = convert (pvoid_type_node, se->expr);
2437 se->expr = gfc_evaluate_now (se->expr, &se->pre);
2441 else if (sym->intmod_sym_id == ISOCBINDING_FUNLOC)
2443 arg->expr->ts.type = sym->ts.derived->ts.type;
2444 arg->expr->ts.f90_type = sym->ts.derived->ts.f90_type;
2445 arg->expr->ts.kind = sym->ts.derived->ts.kind;
2446 gfc_conv_expr_reference (se, arg->expr);
2450 else if ((sym->intmod_sym_id == ISOCBINDING_F_POINTER
2451 && arg->next->expr->rank == 0)
2452 || sym->intmod_sym_id == ISOCBINDING_F_PROCPOINTER)
2454 /* Convert c_f_pointer if fptr is a scalar
2455 and convert c_f_procpointer. */
2459 gfc_init_se (&cptrse, NULL);
2460 gfc_conv_expr (&cptrse, arg->expr);
2461 gfc_add_block_to_block (&se->pre, &cptrse.pre);
2462 gfc_add_block_to_block (&se->post, &cptrse.post);
2464 gfc_init_se (&fptrse, NULL);
2465 if (sym->intmod_sym_id == ISOCBINDING_F_POINTER
2466 || is_proc_ptr_comp (arg->next->expr, NULL))
2467 fptrse.want_pointer = 1;
2469 gfc_conv_expr (&fptrse, arg->next->expr);
2470 gfc_add_block_to_block (&se->pre, &fptrse.pre);
2471 gfc_add_block_to_block (&se->post, &fptrse.post);
2473 if (is_proc_ptr_comp (arg->next->expr, NULL))
2474 tmp = gfc_get_ppc_type (arg->next->expr->ref->u.c.component);
2476 tmp = TREE_TYPE (arg->next->expr->symtree->n.sym->backend_decl);
2477 se->expr = fold_build2 (MODIFY_EXPR, tmp, fptrse.expr,
2478 fold_convert (tmp, cptrse.expr));
2482 else if (sym->intmod_sym_id == ISOCBINDING_ASSOCIATED)
2487 /* Build the addr_expr for the first argument. The argument is
2488 already an *address* so we don't need to set want_pointer in
2490 gfc_init_se (&arg1se, NULL);
2491 gfc_conv_expr (&arg1se, arg->expr);
2492 gfc_add_block_to_block (&se->pre, &arg1se.pre);
2493 gfc_add_block_to_block (&se->post, &arg1se.post);
2495 /* See if we were given two arguments. */
2496 if (arg->next == NULL)
2497 /* Only given one arg so generate a null and do a
2498 not-equal comparison against the first arg. */
2499 se->expr = fold_build2 (NE_EXPR, boolean_type_node, arg1se.expr,
2500 fold_convert (TREE_TYPE (arg1se.expr),
2501 null_pointer_node));
2507 /* Given two arguments so build the arg2se from second arg. */
2508 gfc_init_se (&arg2se, NULL);
2509 gfc_conv_expr (&arg2se, arg->next->expr);
2510 gfc_add_block_to_block (&se->pre, &arg2se.pre);
2511 gfc_add_block_to_block (&se->post, &arg2se.post);
2513 /* Generate test to compare that the two args are equal. */
2514 eq_expr = fold_build2 (EQ_EXPR, boolean_type_node,
2515 arg1se.expr, arg2se.expr);
2516 /* Generate test to ensure that the first arg is not null. */
2517 not_null_expr = fold_build2 (NE_EXPR, boolean_type_node,
2518 arg1se.expr, null_pointer_node);
2520 /* Finally, the generated test must check that both arg1 is not
2521 NULL and that it is equal to the second arg. */
2522 se->expr = fold_build2 (TRUTH_AND_EXPR, boolean_type_node,
2523 not_null_expr, eq_expr);
2532 if (!sym->attr.elemental)
2534 gcc_assert (se->ss->type == GFC_SS_FUNCTION);
2535 if (se->ss->useflags)
2537 gcc_assert (gfc_return_by_reference (sym)
2538 && sym->result->attr.dimension);
2539 gcc_assert (se->loop != NULL);
2541 /* Access the previously obtained result. */
2542 gfc_conv_tmp_array_ref (se);
2543 gfc_advance_se_ss_chain (se);
2547 info = &se->ss->data.info;
2552 gfc_init_block (&post);
2553 gfc_init_interface_mapping (&mapping);
2554 is_proc_ptr_comp (expr, &comp);
2555 need_interface_mapping = ((sym->ts.type == BT_CHARACTER
2556 && sym->ts.cl->length
2557 && sym->ts.cl->length->expr_type
2559 || (comp && comp->attr.dimension)
2560 || (!comp && sym->attr.dimension));
2561 formal = sym->formal;
2562 /* Evaluate the arguments. */
2563 for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL)
2566 fsym = formal ? formal->sym : NULL;
2567 parm_kind = MISSING;
2571 if (se->ignore_optional)
2573 /* Some intrinsics have already been resolved to the correct
2577 else if (arg->label)
2579 has_alternate_specifier = 1;
2584 /* Pass a NULL pointer for an absent arg. */
2585 gfc_init_se (&parmse, NULL);
2586 parmse.expr = null_pointer_node;
2587 if (arg->missing_arg_type == BT_CHARACTER)
2588 parmse.string_length = build_int_cst (gfc_charlen_type_node, 0);
2591 else if (se->ss && se->ss->useflags)
2593 /* An elemental function inside a scalarized loop. */
2594 gfc_init_se (&parmse, se);
2595 gfc_conv_expr_reference (&parmse, e);
2596 parm_kind = ELEMENTAL;
2600 /* A scalar or transformational function. */
2601 gfc_init_se (&parmse, NULL);
2602 argss = gfc_walk_expr (e);
2604 if (argss == gfc_ss_terminator)
2606 if (e->expr_type == EXPR_VARIABLE
2607 && e->symtree->n.sym->attr.cray_pointee
2608 && fsym && fsym->attr.flavor == FL_PROCEDURE)
2610 /* The Cray pointer needs to be converted to a pointer to
2611 a type given by the expression. */
2612 gfc_conv_expr (&parmse, e);
2613 type = build_pointer_type (TREE_TYPE (parmse.expr));
2614 tmp = gfc_get_symbol_decl (e->symtree->n.sym->cp_pointer);
2615 parmse.expr = convert (type, tmp);
2617 else if (fsym && fsym->attr.value)
2619 if (fsym->ts.type == BT_CHARACTER
2620 && fsym->ts.is_c_interop
2621 && fsym->ns->proc_name != NULL
2622 && fsym->ns->proc_name->attr.is_bind_c)
2625 gfc_conv_scalar_char_value (fsym, &parmse, &e);
2626 if (parmse.expr == NULL)
2627 gfc_conv_expr (&parmse, e);
2630 gfc_conv_expr (&parmse, e);
2632 else if (arg->name && arg->name[0] == '%')
2633 /* Argument list functions %VAL, %LOC and %REF are signalled
2634 through arg->name. */
2635 conv_arglist_function (&parmse, arg->expr, arg->name);
2636 else if ((e->expr_type == EXPR_FUNCTION)
2637 && e->symtree->n.sym->attr.pointer
2638 && fsym && fsym->attr.target)
2640 gfc_conv_expr (&parmse, e);
2641 parmse.expr = gfc_build_addr_expr (NULL_TREE, parmse.expr);
2645 gfc_conv_expr_reference (&parmse, e);
2646 if (fsym && e->expr_type != EXPR_NULL
2647 && ((fsym->attr.pointer
2648 && fsym->attr.flavor != FL_PROCEDURE)
2649 || fsym->attr.proc_pointer))
2651 /* Scalar pointer dummy args require an extra level of
2652 indirection. The null pointer already contains
2653 this level of indirection. */
2654 parm_kind = SCALAR_POINTER;
2655 parmse.expr = gfc_build_addr_expr (NULL_TREE, parmse.expr);
2661 /* If the procedure requires an explicit interface, the actual
2662 argument is passed according to the corresponding formal
2663 argument. If the corresponding formal argument is a POINTER,
2664 ALLOCATABLE or assumed shape, we do not use g77's calling
2665 convention, and pass the address of the array descriptor
2666 instead. Otherwise we use g77's calling convention. */
2669 && !(fsym->attr.pointer || fsym->attr.allocatable)
2670 && fsym->as->type != AS_ASSUMED_SHAPE;
2671 f = f || !sym->attr.always_explicit;
2673 if (e->expr_type == EXPR_VARIABLE
2674 && is_subref_array (e))
2675 /* The actual argument is a component reference to an
2676 array of derived types. In this case, the argument
2677 is converted to a temporary, which is passed and then
2678 written back after the procedure call. */
2679 gfc_conv_subref_array_arg (&parmse, e, f,
2680 fsym ? fsym->attr.intent : INTENT_INOUT);
2682 gfc_conv_array_parameter (&parmse, e, argss, f, fsym,
2685 /* If an ALLOCATABLE dummy argument has INTENT(OUT) and is
2686 allocated on entry, it must be deallocated. */
2687 if (fsym && fsym->attr.allocatable
2688 && fsym->attr.intent == INTENT_OUT)
2690 tmp = build_fold_indirect_ref (parmse.expr);
2691 tmp = gfc_trans_dealloc_allocated (tmp);
2692 gfc_add_expr_to_block (&se->pre, tmp);
2698 /* The case with fsym->attr.optional is that of a user subroutine
2699 with an interface indicating an optional argument. When we call
2700 an intrinsic subroutine, however, fsym is NULL, but we might still
2701 have an optional argument, so we proceed to the substitution
2703 if (e && (fsym == NULL || fsym->attr.optional))
2705 /* If an optional argument is itself an optional dummy argument,
2706 check its presence and substitute a null if absent. */
2707 if (e->expr_type == EXPR_VARIABLE
2708 && e->symtree->n.sym->attr.optional)
2709 gfc_conv_missing_dummy (&parmse, e, fsym ? fsym->ts : e->ts,
2710 e->representation.length);
2715 /* Obtain the character length of an assumed character length
2716 length procedure from the typespec. */
2717 if (fsym->ts.type == BT_CHARACTER
2718 && parmse.string_length == NULL_TREE
2719 && e->ts.type == BT_PROCEDURE
2720 && e->symtree->n.sym->ts.type == BT_CHARACTER
2721 && e->symtree->n.sym->ts.cl->length != NULL
2722 && e->symtree->n.sym->ts.cl->length->expr_type == EXPR_CONSTANT)
2724 gfc_conv_const_charlen (e->symtree->n.sym->ts.cl);
2725 parmse.string_length = e->symtree->n.sym->ts.cl->backend_decl;
2729 if (fsym && need_interface_mapping && e)
2730 gfc_add_interface_mapping (&mapping, fsym, &parmse, e);
2732 gfc_add_block_to_block (&se->pre, &parmse.pre);
2733 gfc_add_block_to_block (&post, &parmse.post);
2735 /* Allocated allocatable components of derived types must be
2736 deallocated for non-variable scalars. Non-variable arrays are
2737 dealt with in trans-array.c(gfc_conv_array_parameter). */
2738 if (e && e->ts.type == BT_DERIVED
2739 && e->ts.derived->attr.alloc_comp
2740 && (e->expr_type != EXPR_VARIABLE && !e->rank))
2743 tmp = build_fold_indirect_ref (parmse.expr);
2744 parm_rank = e->rank;
2752 case (SCALAR_POINTER):
2753 tmp = build_fold_indirect_ref (tmp);
2757 if (e->expr_type == EXPR_OP
2758 && e->value.op.op == INTRINSIC_PARENTHESES
2759 && e->value.op.op1->expr_type == EXPR_VARIABLE)
2762 local_tmp = gfc_evaluate_now (tmp, &se->pre);
2763 local_tmp = gfc_copy_alloc_comp (e->ts.derived, local_tmp, tmp, parm_rank);
2764 gfc_add_expr_to_block (&se->post, local_tmp);
2767 tmp = gfc_deallocate_alloc_comp (e->ts.derived, tmp, parm_rank);
2769 gfc_add_expr_to_block (&se->post, tmp);
2772 /* Character strings are passed as two parameters, a length and a
2773 pointer - except for Bind(c) which only passes the pointer. */
2774 if (parmse.string_length != NULL_TREE && !sym->attr.is_bind_c)
2775 stringargs = gfc_chainon_list (stringargs, parmse.string_length);
2777 arglist = gfc_chainon_list (arglist, parmse.expr);
2779 gfc_finish_interface_mapping (&mapping, &se->pre, &se->post);
2782 if (ts.type == BT_CHARACTER && sym->attr.is_bind_c)
2783 se->string_length = build_int_cst (gfc_charlen_type_node, 1);
2784 else if (ts.type == BT_CHARACTER)
2786 if (sym->ts.cl->length == NULL)
2788 /* Assumed character length results are not allowed by 5.1.1.5 of the
2789 standard and are trapped in resolve.c; except in the case of SPREAD
2790 (and other intrinsics?) and dummy functions. In the case of SPREAD,
2791 we take the character length of the first argument for the result.
2792 For dummies, we have to look through the formal argument list for
2793 this function and use the character length found there.*/
2794 if (!sym->attr.dummy)
2795 cl.backend_decl = TREE_VALUE (stringargs);
2798 formal = sym->ns->proc_name->formal;
2799 for (; formal; formal = formal->next)
2800 if (strcmp (formal->sym->name, sym->name) == 0)
2801 cl.backend_decl = formal->sym->ts.cl->backend_decl;
2808 /* Calculate the length of the returned string. */
2809 gfc_init_se (&parmse, NULL);
2810 if (need_interface_mapping)
2811 gfc_apply_interface_mapping (&mapping, &parmse, sym->ts.cl->length);
2813 gfc_conv_expr (&parmse, sym->ts.cl->length);
2814 gfc_add_block_to_block (&se->pre, &parmse.pre);
2815 gfc_add_block_to_block (&se->post, &parmse.post);
2817 tmp = fold_convert (gfc_charlen_type_node, parmse.expr);
2818 tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp,
2819 build_int_cst (gfc_charlen_type_node, 0));
2820 cl.backend_decl = tmp;
2823 /* Set up a charlen structure for it. */
2828 len = cl.backend_decl;
2831 byref = (comp && comp->attr.dimension)
2832 || (!comp && gfc_return_by_reference (sym));
2835 if (se->direct_byref)
2837 /* Sometimes, too much indirection can be applied; e.g. for
2838 function_result = array_valued_recursive_function. */
2839 if (TREE_TYPE (TREE_TYPE (se->expr))
2840 && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr)))
2841 && GFC_DESCRIPTOR_TYPE_P
2842 (TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr)))))
2843 se->expr = build_fold_indirect_ref (se->expr);
2845 retargs = gfc_chainon_list (retargs, se->expr);
2847 else if (sym->result->attr.dimension)
2849 gcc_assert (se->loop && info);
2851 /* Set the type of the array. */
2852 tmp = gfc_typenode_for_spec (&ts);
2853 info->dimen = se->loop->dimen;
2855 /* Evaluate the bounds of the result, if known. */
2856 gfc_set_loop_bounds_from_array_spec (&mapping, se, sym->result->as);
2858 /* Create a temporary to store the result. In case the function
2859 returns a pointer, the temporary will be a shallow copy and
2860 mustn't be deallocated. */
2861 callee_alloc = sym->attr.allocatable || sym->attr.pointer;
2862 gfc_trans_create_temp_array (&se->pre, &se->post, se->loop, info, tmp,
2863 NULL_TREE, false, !sym->attr.pointer,
2864 callee_alloc, &se->ss->expr->where);
2866 /* Pass the temporary as the first argument. */
2867 tmp = info->descriptor;
2868 tmp = gfc_build_addr_expr (NULL_TREE, tmp);
2869 retargs = gfc_chainon_list (retargs, tmp);
2871 else if (ts.type == BT_CHARACTER)
2873 /* Pass the string length. */
2874 type = gfc_get_character_type (ts.kind, ts.cl);
2875 type = build_pointer_type (type);
2877 /* Return an address to a char[0:len-1]* temporary for
2878 character pointers. */
2879 if (sym->attr.pointer || sym->attr.allocatable)
2881 var = gfc_create_var (type, "pstr");
2883 /* Provide an address expression for the function arguments. */
2884 var = gfc_build_addr_expr (NULL_TREE, var);
2887 var = gfc_conv_string_tmp (se, type, len);
2889 retargs = gfc_chainon_list (retargs, var);
2893 gcc_assert (gfc_option.flag_f2c && ts.type == BT_COMPLEX);
2895 type = gfc_get_complex_type (ts.kind);
2896 var = gfc_build_addr_expr (NULL_TREE, gfc_create_var (type, "cmplx"));
2897 retargs = gfc_chainon_list (retargs, var);
2900 /* Add the string length to the argument list. */
2901 if (ts.type == BT_CHARACTER)
2902 retargs = gfc_chainon_list (retargs, len);
2904 gfc_free_interface_mapping (&mapping);
2906 /* Add the return arguments. */
2907 arglist = chainon (retargs, arglist);
2909 /* Add the hidden string length parameters to the arguments. */
2910 arglist = chainon (arglist, stringargs);
2912 /* We may want to append extra arguments here. This is used e.g. for
2913 calls to libgfortran_matmul_??, which need extra information. */
2914 if (append_args != NULL_TREE)
2915 arglist = chainon (arglist, append_args);
2917 /* Generate the actual call. */
2918 conv_function_val (se, sym, expr);
2920 /* If there are alternate return labels, function type should be
2921 integer. Can't modify the type in place though, since it can be shared
2922 with other functions. For dummy arguments, the typing is done to
2923 to this result, even if it has to be repeated for each call. */
2924 if (has_alternate_specifier
2925 && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) != integer_type_node)
2927 if (!sym->attr.dummy)
2929 TREE_TYPE (sym->backend_decl)
2930 = build_function_type (integer_type_node,
2931 TYPE_ARG_TYPES (TREE_TYPE (sym->backend_decl)));
2932 se->expr = gfc_build_addr_expr (NULL_TREE, sym->backend_decl);
2935 TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) = integer_type_node;
2938 fntype = TREE_TYPE (TREE_TYPE (se->expr));
2939 se->expr = build_call_list (TREE_TYPE (fntype), se->expr, arglist);
2941 /* If we have a pointer function, but we don't want a pointer, e.g.
2944 where f is pointer valued, we have to dereference the result. */
2945 if (!se->want_pointer && !byref && sym->attr.pointer
2946 && !is_proc_ptr_comp (expr, NULL))
2947 se->expr = build_fold_indirect_ref (se->expr);
2949 /* f2c calling conventions require a scalar default real function to
2950 return a double precision result. Convert this back to default
2951 real. We only care about the cases that can happen in Fortran 77.
2953 if (gfc_option.flag_f2c && sym->ts.type == BT_REAL
2954 && sym->ts.kind == gfc_default_real_kind
2955 && !sym->attr.always_explicit)
2956 se->expr = fold_convert (gfc_get_real_type (sym->ts.kind), se->expr);
2958 /* A pure function may still have side-effects - it may modify its
2960 TREE_SIDE_EFFECTS (se->expr) = 1;
2962 if (!sym->attr.pure)
2963 TREE_SIDE_EFFECTS (se->expr) = 1;
2968 /* Add the function call to the pre chain. There is no expression. */
2969 gfc_add_expr_to_block (&se->pre, se->expr);
2970 se->expr = NULL_TREE;
2972 if (!se->direct_byref)
2974 if (sym->attr.dimension)
2976 if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS)
2978 /* Check the data pointer hasn't been modified. This would
2979 happen in a function returning a pointer. */
2980 tmp = gfc_conv_descriptor_data_get (info->descriptor);
2981 tmp = fold_build2 (NE_EXPR, boolean_type_node,
2983 gfc_trans_runtime_check (true, false, tmp, &se->pre, NULL,
2986 se->expr = info->descriptor;
2987 /* Bundle in the string length. */
2988 se->string_length = len;
2990 else if (sym->ts.type == BT_CHARACTER)
2992 /* Dereference for character pointer results. */
2993 if (sym->attr.pointer || sym->attr.allocatable)
2994 se->expr = build_fold_indirect_ref (var);
2998 se->string_length = len;
3002 gcc_assert (sym->ts.type == BT_COMPLEX && gfc_option.flag_f2c);
3003 se->expr = build_fold_indirect_ref (var);
3008 /* Follow the function call with the argument post block. */
3010 gfc_add_block_to_block (&se->pre, &post);
3012 gfc_add_block_to_block (&se->post, &post);
3014 return has_alternate_specifier;
3018 /* Fill a character string with spaces. */
3021 fill_with_spaces (tree start, tree type, tree size)
3023 stmtblock_t block, loop;
3024 tree i, el, exit_label, cond, tmp;
3026 /* For a simple char type, we can call memset(). */
3027 if (compare_tree_int (TYPE_SIZE_UNIT (type), 1) == 0)
3028 return build_call_expr (built_in_decls[BUILT_IN_MEMSET], 3, start,
3029 build_int_cst (gfc_get_int_type (gfc_c_int_kind),
3030 lang_hooks.to_target_charset (' ')),
3033 /* Otherwise, we use a loop:
3034 for (el = start, i = size; i > 0; el--, i+= TYPE_SIZE_UNIT (type))
3038 /* Initialize variables. */
3039 gfc_init_block (&block);
3040 i = gfc_create_var (sizetype, "i");
3041 gfc_add_modify (&block, i, fold_convert (sizetype, size));
3042 el = gfc_create_var (build_pointer_type (type), "el");
3043 gfc_add_modify (&block, el, fold_convert (TREE_TYPE (el), start));
3044 exit_label = gfc_build_label_decl (NULL_TREE);
3045 TREE_USED (exit_label) = 1;
3049 gfc_init_block (&loop);
3051 /* Exit condition. */
3052 cond = fold_build2 (LE_EXPR, boolean_type_node, i,
3053 fold_convert (sizetype, integer_zero_node));
3054 tmp = build1_v (GOTO_EXPR, exit_label);
3055 tmp = fold_build3 (COND_EXPR, void_type_node, cond, tmp, build_empty_stmt ());
3056 gfc_add_expr_to_block (&loop, tmp);
3059 gfc_add_modify (&loop, fold_build1 (INDIRECT_REF, type, el),
3060 build_int_cst (type,
3061 lang_hooks.to_target_charset (' ')));
3063 /* Increment loop variables. */
3064 gfc_add_modify (&loop, i, fold_build2 (MINUS_EXPR, sizetype, i,
3065 TYPE_SIZE_UNIT (type)));
3066 gfc_add_modify (&loop, el, fold_build2 (POINTER_PLUS_EXPR,
3068 TYPE_SIZE_UNIT (type)));
3070 /* Making the loop... actually loop! */
3071 tmp = gfc_finish_block (&loop);
3072 tmp = build1_v (LOOP_EXPR, tmp);
3073 gfc_add_expr_to_block (&block, tmp);
3075 /* The exit label. */
3076 tmp = build1_v (LABEL_EXPR, exit_label);
3077 gfc_add_expr_to_block (&block, tmp);
3080 return gfc_finish_block (&block);
3084 /* Generate code to copy a string. */
3087 gfc_trans_string_copy (stmtblock_t * block, tree dlength, tree dest,
3088 int dkind, tree slength, tree src, int skind)
3090 tree tmp, dlen, slen;
3099 stmtblock_t tempblock;
3101 gcc_assert (dkind == skind);
3103 if (slength != NULL_TREE)
3105 slen = fold_convert (size_type_node, gfc_evaluate_now (slength, block));
3106 ssc = string_to_single_character (slen, src, skind);
3110 slen = build_int_cst (size_type_node, 1);
3114 if (dlength != NULL_TREE)
3116 dlen = fold_convert (size_type_node, gfc_evaluate_now (dlength, block));
3117 dsc = string_to_single_character (slen, dest, dkind);
3121 dlen = build_int_cst (size_type_node, 1);
3125 if (slength != NULL_TREE && POINTER_TYPE_P (TREE_TYPE (src)))
3126 ssc = string_to_single_character (slen, src, skind);
3127 if (dlength != NULL_TREE && POINTER_TYPE_P (TREE_TYPE (dest)))
3128 dsc = string_to_single_character (dlen, dest, dkind);
3131 /* Assign directly if the types are compatible. */
3132 if (dsc != NULL_TREE && ssc != NULL_TREE
3133 && TREE_TYPE (dsc) == TREE_TYPE (ssc))
3135 gfc_add_modify (block, dsc, ssc);
3139 /* Do nothing if the destination length is zero. */
3140 cond = fold_build2 (GT_EXPR, boolean_type_node, dlen,
3141 build_int_cst (size_type_node, 0));
3143 /* The following code was previously in _gfortran_copy_string:
3145 // The two strings may overlap so we use memmove.
3147 copy_string (GFC_INTEGER_4 destlen, char * dest,
3148 GFC_INTEGER_4 srclen, const char * src)
3150 if (srclen >= destlen)
3152 // This will truncate if too long.
3153 memmove (dest, src, destlen);
3157 memmove (dest, src, srclen);
3159 memset (&dest[srclen], ' ', destlen - srclen);
3163 We're now doing it here for better optimization, but the logic
3166 /* For non-default character kinds, we have to multiply the string
3167 length by the base type size. */
3168 chartype = gfc_get_char_type (dkind);
3169 slen = fold_build2 (MULT_EXPR, size_type_node,
3170 fold_convert (size_type_node, slen),
3171 fold_convert (size_type_node, TYPE_SIZE_UNIT (chartype)));
3172 dlen = fold_build2 (MULT_EXPR, size_type_node,
3173 fold_convert (size_type_node, dlen),
3174 fold_convert (size_type_node, TYPE_SIZE_UNIT (chartype)));
3177 dest = fold_convert (pvoid_type_node, dest);
3179 dest = gfc_build_addr_expr (pvoid_type_node, dest);
3182 src = fold_convert (pvoid_type_node, src);
3184 src = gfc_build_addr_expr (pvoid_type_node, src);
3186 /* Truncate string if source is too long. */
3187 cond2 = fold_build2 (GE_EXPR, boolean_type_node, slen, dlen);
3188 tmp2 = build_call_expr (built_in_decls[BUILT_IN_MEMMOVE],
3189 3, dest, src, dlen);
3191 /* Else copy and pad with spaces. */
3192 tmp3 = build_call_expr (built_in_decls[BUILT_IN_MEMMOVE],
3193 3, dest, src, slen);
3195 tmp4 = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (dest), dest,
3196 fold_convert (sizetype, slen));
3197 tmp4 = fill_with_spaces (tmp4, chartype,
3198 fold_build2 (MINUS_EXPR, TREE_TYPE(dlen),
3201 gfc_init_block (&tempblock);
3202 gfc_add_expr_to_block (&tempblock, tmp3);
3203 gfc_add_expr_to_block (&tempblock, tmp4);
3204 tmp3 = gfc_finish_block (&tempblock);
3206 /* The whole copy_string function is there. */
3207 tmp = fold_build3 (COND_EXPR, void_type_node, cond2, tmp2, tmp3);
3208 tmp = fold_build3 (COND_EXPR, void_type_node, cond, tmp, build_empty_stmt ());
3209 gfc_add_expr_to_block (block, tmp);
3213 /* Translate a statement function.
3214 The value of a statement function reference is obtained by evaluating the
3215 expression using the values of the actual arguments for the values of the
3216 corresponding dummy arguments. */
3219 gfc_conv_statement_function (gfc_se * se, gfc_expr * expr)
3223 gfc_formal_arglist *fargs;
3224 gfc_actual_arglist *args;
3227 gfc_saved_var *saved_vars;
3233 sym = expr->symtree->n.sym;
3234 args = expr->value.function.actual;
3235 gfc_init_se (&lse, NULL);
3236 gfc_init_se (&rse, NULL);
3239 for (fargs = sym->formal; fargs; fargs = fargs->next)
3241 saved_vars = (gfc_saved_var *)gfc_getmem (n * sizeof (gfc_saved_var));
3242 temp_vars = (tree *)gfc_getmem (n * sizeof (tree));
3244 for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++)
3246 /* Each dummy shall be specified, explicitly or implicitly, to be
3248 gcc_assert (fargs->sym->attr.dimension == 0);
3251 /* Create a temporary to hold the value. */
3252 type = gfc_typenode_for_spec (&fsym->ts);
3253 temp_vars[n] = gfc_create_var (type, fsym->name);
3255 if (fsym->ts.type == BT_CHARACTER)
3257 /* Copy string arguments. */
3260 gcc_assert (fsym->ts.cl && fsym->ts.cl->length
3261 && fsym->ts.cl->length->expr_type == EXPR_CONSTANT);
3263 arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
3264 tmp = gfc_build_addr_expr (build_pointer_type (type),
3267 gfc_conv_expr (&rse, args->expr);
3268 gfc_conv_string_parameter (&rse);
3269 gfc_add_block_to_block (&se->pre, &lse.pre);
3270 gfc_add_block_to_block (&se->pre, &rse.pre);
3272 gfc_trans_string_copy (&se->pre, arglen, tmp, fsym->ts.kind,
3273 rse.string_length, rse.expr, fsym->ts.kind);
3274 gfc_add_block_to_block (&se->pre, &lse.post);
3275 gfc_add_block_to_block (&se->pre, &rse.post);
3279 /* For everything else, just evaluate the expression. */
3280 gfc_conv_expr (&lse, args->expr);
3282 gfc_add_block_to_block (&se->pre, &lse.pre);
3283 gfc_add_modify (&se->pre, temp_vars[n], lse.expr);
3284 gfc_add_block_to_block (&se->pre, &lse.post);
3290 /* Use the temporary variables in place of the real ones. */
3291 for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++)
3292 gfc_shadow_sym (fargs->sym, temp_vars[n], &saved_vars[n]);
3294 gfc_conv_expr (se, sym->value);
3296 if (sym->ts.type == BT_CHARACTER)
3298 gfc_conv_const_charlen (sym->ts.cl);
3300 /* Force the expression to the correct length. */
3301 if (!INTEGER_CST_P (se->string_length)
3302 || tree_int_cst_lt (se->string_length,
3303 sym->ts.cl->backend_decl))
3305 type = gfc_get_character_type (sym->ts.kind, sym->ts.cl);
3306 tmp = gfc_create_var (type, sym->name);
3307 tmp = gfc_build_addr_expr (build_pointer_type (type), tmp);
3308 gfc_trans_string_copy (&se->pre, sym->ts.cl->backend_decl, tmp,
3309 sym->ts.kind, se->string_length, se->expr,
3313 se->string_length = sym->ts.cl->backend_decl;
3316 /* Restore the original variables. */
3317 for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++)
3318 gfc_restore_sym (fargs->sym, &saved_vars[n]);
3319 gfc_free (saved_vars);
3323 /* Return the backend_decl for a procedure pointer component. */
3326 gfc_get_proc_ptr_comp (gfc_se *se, gfc_expr *e)
3329 gfc_init_se (&comp_se, NULL);
3330 e->expr_type = EXPR_VARIABLE;
3331 gfc_conv_expr (&comp_se, e);
3332 comp_se.expr = build_fold_addr_expr (comp_se.expr);
3333 return gfc_evaluate_now (comp_se.expr, &se->pre);
3337 /* Translate a function expression. */
3340 gfc_conv_function_expr (gfc_se * se, gfc_expr * expr)
3344 if (expr->value.function.isym)
3346 gfc_conv_intrinsic_function (se, expr);
3350 /* We distinguish statement functions from general functions to improve
3351 runtime performance. */
3352 if (expr->symtree->n.sym->attr.proc == PROC_ST_FUNCTION)
3354 gfc_conv_statement_function (se, expr);
3358 /* expr.value.function.esym is the resolved (specific) function symbol for
3359 most functions. However this isn't set for dummy procedures. */
3360 sym = expr->value.function.esym;
3362 sym = expr->symtree->n.sym;
3364 gfc_conv_procedure_call (se, sym, expr->value.function.actual, expr,
3370 gfc_conv_array_constructor_expr (gfc_se * se, gfc_expr * expr)
3372 gcc_assert (se->ss != NULL && se->ss != gfc_ss_terminator);
3373 gcc_assert (se->ss->expr == expr && se->ss->type == GFC_SS_CONSTRUCTOR);
3375 gfc_conv_tmp_array_ref (se);
3376 gfc_advance_se_ss_chain (se);
3380 /* Build a static initializer. EXPR is the expression for the initial value.
3381 The other parameters describe the variable of the component being
3382 initialized. EXPR may be null. */
3385 gfc_conv_initializer (gfc_expr * expr, gfc_typespec * ts, tree type,
3386 bool array, bool pointer)
3390 if (!(expr || pointer))
3393 /* Check if we have ISOCBINDING_NULL_PTR or ISOCBINDING_NULL_FUNPTR
3394 (these are the only two iso_c_binding derived types that can be
3395 used as initialization expressions). If so, we need to modify
3396 the 'expr' to be that for a (void *). */
3397 if (expr != NULL && expr->ts.type == BT_DERIVED
3398 && expr->ts.is_iso_c && expr->ts.derived)
3400 gfc_symbol *derived = expr->ts.derived;
3402 expr = gfc_int_expr (0);
3404 /* The derived symbol has already been converted to a (void *). Use
3406 expr->ts.f90_type = derived->ts.f90_type;
3407 expr->ts.kind = derived->ts.kind;
3412 /* Arrays need special handling. */
3414 return gfc_build_null_descriptor (type);
3416 return gfc_conv_array_initializer (type, expr);
3419 return fold_convert (type, null_pointer_node);
3425 gfc_init_se (&se, NULL);
3426 gfc_conv_structure (&se, expr, 1);
3430 return gfc_conv_string_init (ts->cl->backend_decl,expr);
3433 gfc_init_se (&se, NULL);
3434 gfc_conv_constant (&se, expr);
3441 gfc_trans_subarray_assign (tree dest, gfc_component * cm, gfc_expr * expr)
3453 gfc_start_block (&block);
3455 /* Initialize the scalarizer. */
3456 gfc_init_loopinfo (&loop);
3458 gfc_init_se (&lse, NULL);
3459 gfc_init_se (&rse, NULL);
3462 rss = gfc_walk_expr (expr);
3463 if (rss == gfc_ss_terminator)
3465 /* The rhs is scalar. Add a ss for the expression. */
3466 rss = gfc_get_ss ();
3467 rss->next = gfc_ss_terminator;
3468 rss->type = GFC_SS_SCALAR;
3472 /* Create a SS for the destination. */
3473 lss = gfc_get_ss ();
3474 lss->type = GFC_SS_COMPONENT;
3476 lss->shape = gfc_get_shape (cm->as->rank);
3477 lss->next = gfc_ss_terminator;
3478 lss->data.info.dimen = cm->as->rank;
3479 lss->data.info.descriptor = dest;
3480 lss->data.info.data = gfc_conv_array_data (dest);
3481 lss->data.info.offset = gfc_conv_array_offset (dest);
3482 for (n = 0; n < cm->as->rank; n++)
3484 lss->data.info.dim[n] = n;
3485 lss->data.info.start[n] = gfc_conv_array_lbound (dest, n);
3486 lss->data.info.stride[n] = gfc_index_one_node;
3488 mpz_init (lss->shape[n]);
3489 mpz_sub (lss->shape[n], cm->as->upper[n]->value.integer,
3490 cm->as->lower[n]->value.integer);
3491 mpz_add_ui (lss->shape[n], lss->shape[n], 1);
3494 /* Associate the SS with the loop. */
3495 gfc_add_ss_to_loop (&loop, lss);
3496 gfc_add_ss_to_loop (&loop, rss);
3498 /* Calculate the bounds of the scalarization. */
3499 gfc_conv_ss_startstride (&loop);
3501 /* Setup the scalarizing loops. */
3502 gfc_conv_loop_setup (&loop, &expr->where);
3504 /* Setup the gfc_se structures. */
3505 gfc_copy_loopinfo_to_se (&lse, &loop);
3506 gfc_copy_loopinfo_to_se (&rse, &loop);
3509 gfc_mark_ss_chain_used (rss, 1);
3511 gfc_mark_ss_chain_used (lss, 1);
3513 /* Start the scalarized loop body. */
3514 gfc_start_scalarized_body (&loop, &body);
3516 gfc_conv_tmp_array_ref (&lse);
3517 if (cm->ts.type == BT_CHARACTER)
3518 lse.string_length = cm->ts.cl->backend_decl;
3520 gfc_conv_expr (&rse, expr);
3522 tmp = gfc_trans_scalar_assign (&lse, &rse, cm->ts, true, false);
3523 gfc_add_expr_to_block (&body, tmp);
3525 gcc_assert (rse.ss == gfc_ss_terminator);
3527 /* Generate the copying loops. */
3528 gfc_trans_scalarizing_loops (&loop, &body);
3530 /* Wrap the whole thing up. */
3531 gfc_add_block_to_block (&block, &loop.pre);
3532 gfc_add_block_to_block (&block, &loop.post);
3534 for (n = 0; n < cm->as->rank; n++)
3535 mpz_clear (lss->shape[n]);
3536 gfc_free (lss->shape);
3538 gfc_cleanup_loop (&loop);
3540 return gfc_finish_block (&block);
3544 /* Assign a single component of a derived type constructor. */
3547 gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr)
3557 gfc_start_block (&block);
3559 if (cm->attr.pointer)
3561 gfc_init_se (&se, NULL);
3562 /* Pointer component. */
3563 if (cm->attr.dimension)
3565 /* Array pointer. */
3566 if (expr->expr_type == EXPR_NULL)
3567 gfc_conv_descriptor_data_set (&block, dest, null_pointer_node);
3570 rss = gfc_walk_expr (expr);
3571 se.direct_byref = 1;
3573 gfc_conv_expr_descriptor (&se, expr, rss);
3574 gfc_add_block_to_block (&block, &se.pre);
3575 gfc_add_block_to_block (&block, &se.post);
3580 /* Scalar pointers. */
3581 se.want_pointer = 1;
3582 gfc_conv_expr (&se, expr);
3583 gfc_add_block_to_block (&block, &se.pre);
3584 gfc_add_modify (&block, dest,
3585 fold_convert (TREE_TYPE (dest), se.expr));
3586 gfc_add_block_to_block (&block, &se.post);
3589 else if (cm->attr.dimension)
3591 if (cm->attr.allocatable && expr->expr_type == EXPR_NULL)
3592 gfc_conv_descriptor_data_set (&block, dest, null_pointer_node);
3593 else if (cm->attr.allocatable)
3597 gfc_init_se (&se, NULL);
3599 rss = gfc_walk_expr (expr);
3600 se.want_pointer = 0;
3601 gfc_conv_expr_descriptor (&se, expr, rss);
3602 gfc_add_block_to_block (&block, &se.pre);
3604 tmp = fold_convert (TREE_TYPE (dest), se.expr);
3605 gfc_add_modify (&block, dest, tmp);
3607 if (cm->ts.type == BT_DERIVED && cm->ts.derived->attr.alloc_comp)
3608 tmp = gfc_copy_alloc_comp (cm->ts.derived, se.expr, dest,
3611 tmp = gfc_duplicate_allocatable (dest, se.expr,
3612 TREE_TYPE(cm->backend_decl),
3615 gfc_add_expr_to_block (&block, tmp);
3616 gfc_add_block_to_block (&block, &se.post);
3618 if (expr->expr_type != EXPR_VARIABLE)
3619 gfc_conv_descriptor_data_set (&block, se.expr, null_pointer_node);
3621 /* Shift the lbound and ubound of temporaries to being unity, rather
3622 than zero, based. Calculate the offset for all cases. */
3623 offset = gfc_conv_descriptor_offset (dest);
3624 gfc_add_modify (&block, offset, gfc_index_zero_node);
3625 tmp2 =gfc_create_var (gfc_array_index_type, NULL);
3626 for (n = 0; n < expr->rank; n++)
3628 if (expr->expr_type != EXPR_VARIABLE
3629 && expr->expr_type != EXPR_CONSTANT)
3632 tmp = gfc_conv_descriptor_ubound (dest, gfc_rank_cst[n]);
3633 span = fold_build2 (MINUS_EXPR, gfc_array_index_type, tmp,
3634 gfc_conv_descriptor_lbound (dest, gfc_rank_cst[n]));
3635 gfc_add_modify (&block, tmp,
3636 fold_build2 (PLUS_EXPR,
3637 gfc_array_index_type,
3638 span, gfc_index_one_node));
3639 tmp = gfc_conv_descriptor_lbound (dest, gfc_rank_cst[n]);
3640 gfc_add_modify (&block, tmp, gfc_index_one_node);
3642 tmp = fold_build2 (MULT_EXPR, gfc_array_index_type,
3643 gfc_conv_descriptor_lbound (dest,
3645 gfc_conv_descriptor_stride (dest,
3647 gfc_add_modify (&block, tmp2, tmp);
3648 tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp2);
3649 gfc_add_modify (&block, offset, tmp);
3652 if (expr->expr_type == EXPR_FUNCTION
3653 && expr->value.function.isym
3654 && expr->value.function.isym->conversion
3655 && expr->value.function.actual->expr
3656 && expr->value.function.actual->expr->expr_type
3659 /* If a conversion expression has a null data pointer
3660 argument, nullify the allocatable component. */
3664 s = expr->value.function.actual->expr->symtree->n.sym;
3665 if (s->attr.allocatable || s->attr.pointer)
3667 non_null_expr = gfc_finish_block (&block);
3668 gfc_start_block (&block);
3669 gfc_conv_descriptor_data_set (&block, dest,
3671 null_expr = gfc_finish_block (&block);
3672 tmp = gfc_conv_descriptor_data_get (s->backend_decl);
3673 tmp = build2 (EQ_EXPR, boolean_type_node, tmp,
3674 fold_convert (TREE_TYPE (tmp),
3675 null_pointer_node));
3676 return build3_v (COND_EXPR, tmp, null_expr,
3683 tmp = gfc_trans_subarray_assign (dest, cm, expr);
3684 gfc_add_expr_to_block (&block, tmp);
3687 else if (expr->ts.type == BT_DERIVED)
3689 if (expr->expr_type != EXPR_STRUCTURE)
3691 gfc_init_se (&se, NULL);
3692 gfc_conv_expr (&se, expr);
3693 gfc_add_block_to_block (&block, &se.pre);
3694 gfc_add_modify (&block, dest,
3695 fold_convert (TREE_TYPE (dest), se.expr));
3696 gfc_add_block_to_block (&block, &se.post);
3700 /* Nested constructors. */
3701 tmp = gfc_trans_structure_assign (dest, expr);
3702 gfc_add_expr_to_block (&block, tmp);
3707 /* Scalar component. */
3708 gfc_init_se (&se, NULL);
3709 gfc_init_se (&lse, NULL);
3711 gfc_conv_expr (&se, expr);
3712 if (cm->ts.type == BT_CHARACTER)
3713 lse.string_length = cm->ts.cl->backend_decl;
3715 tmp = gfc_trans_scalar_assign (&lse, &se, cm->ts, true, false);
3716 gfc_add_expr_to_block (&block, tmp);
3718 return gfc_finish_block (&block);
3721 /* Assign a derived type constructor to a variable. */
3724 gfc_trans_structure_assign (tree dest, gfc_expr * expr)
3732 gfc_start_block (&block);
3733 cm = expr->ts.derived->components;
3734 for (c = expr->value.constructor; c; c = c->next, cm = cm->next)
3736 /* Skip absent members in default initializers. */
3740 field = cm->backend_decl;
3741 tmp = fold_build3 (COMPONENT_REF, TREE_TYPE (field),
3742 dest, field, NULL_TREE);
3743 tmp = gfc_trans_subcomponent_assign (tmp, cm, c->expr);
3744 gfc_add_expr_to_block (&block, tmp);
3746 return gfc_finish_block (&block);
3749 /* Build an expression for a constructor. If init is nonzero then
3750 this is part of a static variable initializer. */
3753 gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init)
3760 VEC(constructor_elt,gc) *v = NULL;
3762 gcc_assert (se->ss == NULL);
3763 gcc_assert (expr->expr_type == EXPR_STRUCTURE);
3764 type = gfc_typenode_for_spec (&expr->ts);
3768 /* Create a temporary variable and fill it in. */
3769 se->expr = gfc_create_var (type, expr->ts.derived->name);
3770 tmp = gfc_trans_structure_assign (se->expr, expr);
3771 gfc_add_expr_to_block (&se->pre, tmp);
3775 cm = expr->ts.derived->components;
3777 for (c = expr->value.constructor; c; c = c->next, cm = cm->next)
3779 /* Skip absent members in default initializers and allocatable
3780 components. Although the latter have a default initializer
3781 of EXPR_NULL,... by default, the static nullify is not needed
3782 since this is done every time we come into scope. */
3783 if (!c->expr || cm->attr.allocatable)
3786 val = gfc_conv_initializer (c->expr, &cm->ts,
3787 TREE_TYPE (cm->backend_decl), cm->attr.dimension,
3788 cm->attr.pointer || cm->attr.proc_pointer);
3790 /* Append it to the constructor list. */
3791 CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val);
3793 se->expr = build_constructor (type, v);
3795 TREE_CONSTANT (se->expr) = 1;
3799 /* Translate a substring expression. */
3802 gfc_conv_substring_expr (gfc_se * se, gfc_expr * expr)
3808 gcc_assert (ref == NULL || ref->type == REF_SUBSTRING);
3810 se->expr = gfc_build_wide_string_const (expr->ts.kind,
3811 expr->value.character.length,
3812 expr->value.character.string);
3814 se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr)));
3815 TYPE_STRING_FLAG (TREE_TYPE (se->expr)) = 1;
3818 gfc_conv_substring (se, ref, expr->ts.kind, NULL, &expr->where);
3822 /* Entry point for expression translation. Evaluates a scalar quantity.
3823 EXPR is the expression to be translated, and SE is the state structure if
3824 called from within the scalarized. */
3827 gfc_conv_expr (gfc_se * se, gfc_expr * expr)
3829 if (se->ss && se->ss->expr == expr
3830 && (se->ss->type == GFC_SS_SCALAR || se->ss->type == GFC_SS_REFERENCE))
3832 /* Substitute a scalar expression evaluated outside the scalarization
3834 se->expr = se->ss->data.scalar.expr;
3835 se->string_length = se->ss->string_length;
3836 gfc_advance_se_ss_chain (se);
3840 /* We need to convert the expressions for the iso_c_binding derived types.
3841 C_NULL_PTR and C_NULL_FUNPTR will be made EXPR_NULL, which evaluates to
3842 null_pointer_node. C_PTR and C_FUNPTR are converted to match the
3843 typespec for the C_PTR and C_FUNPTR symbols, which has already been
3844 updated to be an integer with a kind equal to the size of a (void *). */
3845 if (expr->ts.type == BT_DERIVED && expr->ts.derived
3846 && expr->ts.derived->attr.is_iso_c)
3848 if (expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_PTR
3849 || expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_NULL_FUNPTR)
3851 /* Set expr_type to EXPR_NULL, which will result in
3852 null_pointer_node being used below. */
3853 expr->expr_type = EXPR_NULL;
3857 /* Update the type/kind of the expression to be what the new
3858 type/kind are for the updated symbols of C_PTR/C_FUNPTR. */
3859 expr->ts.type = expr->ts.derived->ts.type;
3860 expr->ts.f90_type = expr->ts.derived->ts.f90_type;
3861 expr->ts.kind = expr->ts.derived->ts.kind;
3865 switch (expr->expr_type)
3868 gfc_conv_expr_op (se, expr);
3872 gfc_conv_function_expr (se, expr);
3876 gfc_conv_constant (se, expr);
3880 gfc_conv_variable (se, expr);
3884 se->expr = null_pointer_node;
3887 case EXPR_SUBSTRING:
3888 gfc_conv_substring_expr (se, expr);
3891 case EXPR_STRUCTURE:
3892 gfc_conv_structure (se, expr, 0);
3896 gfc_conv_array_constructor_expr (se, expr);
3905 /* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs
3906 of an assignment. */
3908 gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr)
3910 gfc_conv_expr (se, expr);
3911 /* All numeric lvalues should have empty post chains. If not we need to
3912 figure out a way of rewriting an lvalue so that it has no post chain. */
3913 gcc_assert (expr->ts.type == BT_CHARACTER || !se->post.head);
3916 /* Like gfc_conv_expr, but the POST block is guaranteed to be empty for
3917 numeric expressions. Used for scalar values where inserting cleanup code
3920 gfc_conv_expr_val (gfc_se * se, gfc_expr * expr)
3924 gcc_assert (expr->ts.type != BT_CHARACTER);
3925 gfc_conv_expr (se, expr);
3928 val = gfc_create_var (TREE_TYPE (se->expr), NULL);
3929 gfc_add_modify (&se->pre, val, se->expr);
3931 gfc_add_block_to_block (&se->pre, &se->post);
3935 /* Helper to translate an expression and convert it to a particular type. */
3937 gfc_conv_expr_type (gfc_se * se, gfc_expr * expr, tree type)
3939 gfc_conv_expr_val (se, expr);
3940 se->expr = convert (type, se->expr);
3944 /* Converts an expression so that it can be passed by reference. Scalar
3948 gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr)
3952 if (se->ss && se->ss->expr == expr
3953 && se->ss->type == GFC_SS_REFERENCE)
3955 se->expr = se->ss->data.scalar.expr;
3956 se->string_length = se->ss->string_length;
3957 gfc_advance_se_ss_chain (se);
3961 if (expr->ts.type == BT_CHARACTER)
3963 gfc_conv_expr (se, expr);
3964 gfc_conv_string_parameter (se);
3968 if (expr->expr_type == EXPR_VARIABLE)
3970 se->want_pointer = 1;
3971 gfc_conv_expr (se, expr);
3974 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
3975 gfc_add_modify (&se->pre, var, se->expr);
3976 gfc_add_block_to_block (&se->pre, &se->post);
3982 if (expr->expr_type == EXPR_FUNCTION
3983 && expr->symtree->n.sym->attr.pointer
3984 && !expr->symtree->n.sym->attr.dimension)
3986 se->want_pointer = 1;
3987 gfc_conv_expr (se, expr);
3988 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
3989 gfc_add_modify (&se->pre, var, se->expr);
3995 gfc_conv_expr (se, expr);
3997 /* Create a temporary var to hold the value. */
3998 if (TREE_CONSTANT (se->expr))
4000 tree tmp = se->expr;
4001 STRIP_TYPE_NOPS (tmp);
4002 var = build_decl (CONST_DECL, NULL, TREE_TYPE (tmp));
4003 DECL_INITIAL (var) = tmp;
4004 TREE_STATIC (var) = 1;
4009 var = gfc_create_var (TREE_TYPE (se->expr), NULL);
4010 gfc_add_modify (&se->pre, var, se->expr);
4012 gfc_add_block_to_block (&se->pre, &se->post);
4014 /* Take the address of that value. */
4015 se->expr = gfc_build_addr_expr (NULL_TREE, var);
4020 gfc_trans_pointer_assign (gfc_code * code)
4022 return gfc_trans_pointer_assignment (code->expr1, code->expr2);
4026 /* Generate code for a pointer assignment. */
4029 gfc_trans_pointer_assignment (gfc_expr * expr1, gfc_expr * expr2)
4040 gfc_start_block (&block);
4042 gfc_init_se (&lse, NULL);
4044 lss = gfc_walk_expr (expr1);
4045 rss = gfc_walk_expr (expr2);
4046 if (lss == gfc_ss_terminator)
4048 /* Scalar pointers. */
4049 lse.want_pointer = 1;
4050 gfc_conv_expr (&lse, expr1);
4051 gcc_assert (rss == gfc_ss_terminator);
4052 gfc_init_se (&rse, NULL);
4053 rse.want_pointer = 1;
4054 gfc_conv_expr (&rse, expr2);
4056 if (expr1->symtree->n.sym->attr.proc_pointer
4057 && expr1->symtree->n.sym->attr.dummy)
4058 lse.expr = build_fold_indirect_ref (lse.expr);
4060 if (expr2->symtree && expr2->symtree->n.sym->attr.proc_pointer
4061 && expr2->symtree->n.sym->attr.dummy)
4062 rse.expr = build_fold_indirect_ref (rse.expr);
4064 gfc_add_block_to_block (&block, &lse.pre);
4065 gfc_add_block_to_block (&block, &rse.pre);
4067 /* Check character lengths if character expression. The test is only
4068 really added if -fbounds-check is enabled. */
4069 if (expr1->ts.type == BT_CHARACTER && expr2->expr_type != EXPR_NULL)
4071 gcc_assert (expr2->ts.type == BT_CHARACTER);
4072 gcc_assert (lse.string_length && rse.string_length);
4073 gfc_trans_same_strlen_check ("pointer assignment", &expr1->where,
4074 lse.string_length, rse.string_length,
4078 gfc_add_modify (&block, lse.expr,
4079 fold_convert (TREE_TYPE (lse.expr), rse.expr));
4081 gfc_add_block_to_block (&block, &rse.post);
4082 gfc_add_block_to_block (&block, &lse.post);
4087 tree strlen_rhs = NULL_TREE;
4089 /* Array pointer. */
4090 gfc_conv_expr_descriptor (&lse, expr1, lss);
4091 strlen_lhs = lse.string_length;
4092 switch (expr2->expr_type)
4095 /* Just set the data pointer to null. */
4096 gfc_conv_descriptor_data_set (&lse.pre, lse.expr, null_pointer_node);
4100 /* Assign directly to the pointer's descriptor. */
4101 lse.direct_byref = 1;
4102 gfc_conv_expr_descriptor (&lse, expr2, rss);
4103 strlen_rhs = lse.string_length;
4105 /* If this is a subreference array pointer assignment, use the rhs
4106 descriptor element size for the lhs span. */
4107 if (expr1->symtree->n.sym->attr.subref_array_pointer)
4109 decl = expr1->symtree->n.sym->backend_decl;
4110 gfc_init_se (&rse, NULL);
4111 rse.descriptor_only = 1;
4112 gfc_conv_expr (&rse, expr2);
4113 tmp = gfc_get_element_type (TREE_TYPE (rse.expr));
4114 tmp = fold_convert (gfc_array_index_type, size_in_bytes (tmp));
4115 if (!INTEGER_CST_P (tmp))
4116 gfc_add_block_to_block (&lse.post, &rse.pre);
4117 gfc_add_modify (&lse.post, GFC_DECL_SPAN(decl), tmp);
4123 /* Assign to a temporary descriptor and then copy that
4124 temporary to the pointer. */
4126 tmp = gfc_create_var (TREE_TYPE (desc), "ptrtemp");
4129 lse.direct_byref = 1;
4130 gfc_conv_expr_descriptor (&lse, expr2, rss);
4131 strlen_rhs = lse.string_length;
4132 gfc_add_modify (&lse.pre, desc, tmp);
4136 gfc_add_block_to_block (&block, &lse.pre);
4138 /* Check string lengths if applicable. The check is only really added
4139 to the output code if -fbounds-check is enabled. */
4140 if (expr1->ts.type == BT_CHARACTER && expr2->expr_type != EXPR_NULL)
4142 gcc_assert (expr2->ts.type == BT_CHARACTER);
4143 gcc_assert (strlen_lhs && strlen_rhs);
4144 gfc_trans_same_strlen_check ("pointer assignment", &expr1->where,
4145 strlen_lhs, strlen_rhs, &block);
4148 gfc_add_block_to_block (&block, &lse.post);
4150 return gfc_finish_block (&block);
4154 /* Makes sure se is suitable for passing as a function string parameter. */
4155 /* TODO: Need to check all callers of this function. It may be abused. */
4158 gfc_conv_string_parameter (gfc_se * se)
4162 if (TREE_CODE (se->expr) == STRING_CST)
4164 type = TREE_TYPE (TREE_TYPE (se->expr));
4165 se->expr = gfc_build_addr_expr (build_pointer_type (type), se->expr);
4169 if (TYPE_STRING_FLAG (TREE_TYPE (se->expr)))
4171 if (TREE_CODE (se->expr) != INDIRECT_REF)
4173 type = TREE_TYPE (se->expr);
4174 se->expr = gfc_build_addr_expr (build_pointer_type (type), se->expr);
4178 type = gfc_get_character_type_len (gfc_default_character_kind,
4180 type = build_pointer_type (type);
4181 se->expr = gfc_build_addr_expr (type, se->expr);
4185 gcc_assert (POINTER_TYPE_P (TREE_TYPE (se->expr)));
4186 gcc_assert (se->string_length
4187 && TREE_CODE (TREE_TYPE (se->string_length)) == INTEGER_TYPE);
4191 /* Generate code for assignment of scalar variables. Includes character
4192 strings and derived types with allocatable components. */
4195 gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts,
4196 bool l_is_temp, bool r_is_var)
4202 gfc_init_block (&block);
4204 if (ts.type == BT_CHARACTER)
4209 if (lse->string_length != NULL_TREE)
4211 gfc_conv_string_parameter (lse);
4212 gfc_add_block_to_block (&block, &lse->pre);
4213 llen = lse->string_length;
4216 if (rse->string_length != NULL_TREE)
4218 gcc_assert (rse->string_length != NULL_TREE);
4219 gfc_conv_string_parameter (rse);
4220 gfc_add_block_to_block (&block, &rse->pre);
4221 rlen = rse->string_length;
4224 gfc_trans_string_copy (&block, llen, lse->expr, ts.kind, rlen,
4225 rse->expr, ts.kind);
4227 else if (ts.type == BT_DERIVED && ts.derived->attr.alloc_comp)
4231 /* Are the rhs and the lhs the same? */
4234 cond = fold_build2 (EQ_EXPR, boolean_type_node,
4235 gfc_build_addr_expr (NULL_TREE, lse->expr),
4236 gfc_build_addr_expr (NULL_TREE, rse->expr));
4237 cond = gfc_evaluate_now (cond, &lse->pre);
4240 /* Deallocate the lhs allocated components as long as it is not
4241 the same as the rhs. This must be done following the assignment
4242 to prevent deallocating data that could be used in the rhs
4246 tmp = gfc_evaluate_now (lse->expr, &lse->pre);
4247 tmp = gfc_deallocate_alloc_comp (ts.derived, tmp, 0);
4249 tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp);
4250 gfc_add_expr_to_block (&lse->post, tmp);
4253 gfc_add_block_to_block (&block, &rse->pre);
4254 gfc_add_block_to_block (&block, &lse->pre);
4256 gfc_add_modify (&block, lse->expr,
4257 fold_convert (TREE_TYPE (lse->expr), rse->expr));
4259 /* Do a deep copy if the rhs is a variable, if it is not the
4263 tmp = gfc_copy_alloc_comp (ts.derived, rse->expr, lse->expr, 0);
4264 tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp);
4265 gfc_add_expr_to_block (&block, tmp);
4270 gfc_add_block_to_block (&block, &lse->pre);
4271 gfc_add_block_to_block (&block, &rse->pre);
4273 gfc_add_modify (&block, lse->expr,
4274 fold_convert (TREE_TYPE (lse->expr), rse->expr));
4277 gfc_add_block_to_block (&block, &lse->post);
4278 gfc_add_block_to_block (&block, &rse->post);
4280 return gfc_finish_block (&block);
4284 /* Try to translate array(:) = func (...), where func is a transformational
4285 array function, without using a temporary. Returns NULL is this isn't the
4289 gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2)
4294 bool seen_array_ref;
4295 gfc_component *comp = NULL;
4297 /* The caller has already checked rank>0 and expr_type == EXPR_FUNCTION. */
4298 if (expr2->value.function.isym && !gfc_is_intrinsic_libcall (expr2))
4301 /* Elemental functions don't need a temporary anyway. */
4302 if (expr2->value.function.esym != NULL
4303 && expr2->value.function.esym->attr.elemental)
4306 /* Fail if EXPR1 can't be expressed as a descriptor. */
4307 if (gfc_ref_needs_temporary_p (expr1->ref))
4310 /* Functions returning pointers need temporaries. */
4311 if (expr2->symtree->n.sym->attr.pointer
4312 || expr2->symtree->n.sym->attr.allocatable)
4315 /* Character array functions need temporaries unless the
4316 character lengths are the same. */
4317 if (expr2->ts.type == BT_CHARACTER && expr2->rank > 0)
4319 if (expr1->ts.cl->length == NULL
4320 || expr1->ts.cl->length->expr_type != EXPR_CONSTANT)
4323 if (expr2->ts.cl->length == NULL
4324 || expr2->ts.cl->length->expr_type != EXPR_CONSTANT)
4327 if (mpz_cmp (expr1->ts.cl->length->value.integer,
4328 expr2->ts.cl->length->value.integer) != 0)
4332 /* Check that no LHS component references appear during an array
4333 reference. This is needed because we do not have the means to
4334 span any arbitrary stride with an array descriptor. This check
4335 is not needed for the rhs because the function result has to be
4337 seen_array_ref = false;
4338 for (ref = expr1->ref; ref; ref = ref->next)
4340 if (ref->type == REF_ARRAY)
4341 seen_array_ref= true;
4342 else if (ref->type == REF_COMPONENT && seen_array_ref)
4346 /* Check for a dependency. */
4347 if (gfc_check_fncall_dependency (expr1, INTENT_OUT,
4348 expr2->value.function.esym,
4349 expr2->value.function.actual,
4353 /* The frontend doesn't seem to bother filling in expr->symtree for intrinsic
4355 is_proc_ptr_comp(expr2, &comp);
4356 gcc_assert (expr2->value.function.isym
4357 || (comp && comp->attr.dimension)
4358 || (!comp && gfc_return_by_reference (expr2->value.function.esym)
4359 && expr2->value.function.esym->result->attr.dimension));
4361 ss = gfc_walk_expr (expr1);
4362 gcc_assert (ss != gfc_ss_terminator);
4363 gfc_init_se (&se, NULL);
4364 gfc_start_block (&se.pre);
4365 se.want_pointer = 1;
4367 gfc_conv_array_parameter (&se, expr1, ss, 0, NULL, NULL, NULL);
4369 se.direct_byref = 1;
4370 se.ss = gfc_walk_expr (expr2);
4371 gcc_assert (se.ss != gfc_ss_terminator);
4372 gfc_conv_function_expr (&se, expr2);
4373 gfc_add_block_to_block (&se.pre, &se.post);
4375 return gfc_finish_block (&se.pre);
4378 /* Determine whether the given EXPR_CONSTANT is a zero initializer. */
4381 is_zero_initializer_p (gfc_expr * expr)
4383 if (expr->expr_type != EXPR_CONSTANT)
4386 /* We ignore constants with prescribed memory representations for now. */
4387 if (expr->representation.string)
4390 switch (expr->ts.type)
4393 return mpz_cmp_si (expr->value.integer, 0) == 0;
4396 return mpfr_zero_p (expr->value.real)
4397 && MPFR_SIGN (expr->value.real) >= 0;
4400 return expr->value.logical == 0;
4403 return mpfr_zero_p (expr->value.complex.r)
4404 && MPFR_SIGN (expr->value.complex.r) >= 0
4405 && mpfr_zero_p (expr->value.complex.i)
4406 && MPFR_SIGN (expr->value.complex.i) >= 0;
4414 /* Try to efficiently translate array(:) = 0. Return NULL if this
4418 gfc_trans_zero_assign (gfc_expr * expr)
4420 tree dest, len, type;
4424 sym = expr->symtree->n.sym;
4425 dest = gfc_get_symbol_decl (sym);
4427 type = TREE_TYPE (dest);
4428 if (POINTER_TYPE_P (type))
4429 type = TREE_TYPE (type);
4430 if (!GFC_ARRAY_TYPE_P (type))
4433 /* Determine the length of the array. */
4434 len = GFC_TYPE_ARRAY_SIZE (type);
4435 if (!len || TREE_CODE (len) != INTEGER_CST)
4438 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (type));
4439 len = fold_build2 (MULT_EXPR, gfc_array_index_type, len,
4440 fold_convert (gfc_array_index_type, tmp));
4442 /* If we are zeroing a local array avoid taking its address by emitting
4444 if (!POINTER_TYPE_P (TREE_TYPE (dest)))
4445 return build2 (MODIFY_EXPR, void_type_node,
4446 dest, build_constructor (TREE_TYPE (dest), NULL));
4448 /* Convert arguments to the correct types. */
4449 dest = fold_convert (pvoid_type_node, dest);
4450 len = fold_convert (size_type_node, len);
4452 /* Construct call to __builtin_memset. */
4453 tmp = build_call_expr (built_in_decls[BUILT_IN_MEMSET],
4454 3, dest, integer_zero_node, len);
4455 return fold_convert (void_type_node, tmp);
4459 /* Helper for gfc_trans_array_copy and gfc_trans_array_constructor_copy
4460 that constructs the call to __builtin_memcpy. */
4463 gfc_build_memcpy_call (tree dst, tree src, tree len)
4467 /* Convert arguments to the correct types. */
4468 if (!POINTER_TYPE_P (TREE_TYPE (dst)))
4469 dst = gfc_build_addr_expr (pvoid_type_node, dst);
4471 dst = fold_convert (pvoid_type_node, dst);
4473 if (!POINTER_TYPE_P (TREE_TYPE (src)))
4474 src = gfc_build_addr_expr (pvoid_type_node, src);
4476 src = fold_convert (pvoid_type_node, src);
4478 len = fold_convert (size_type_node, len);
4480 /* Construct call to __builtin_memcpy. */
4481 tmp = build_call_expr (built_in_decls[BUILT_IN_MEMCPY], 3, dst, src, len);
4482 return fold_convert (void_type_node, tmp);
4486 /* Try to efficiently translate dst(:) = src(:). Return NULL if this
4487 can't be done. EXPR1 is the destination/lhs and EXPR2 is the
4488 source/rhs, both are gfc_full_array_ref_p which have been checked for
4492 gfc_trans_array_copy (gfc_expr * expr1, gfc_expr * expr2)
4494 tree dst, dlen, dtype;
4495 tree src, slen, stype;
4498 dst = gfc_get_symbol_decl (expr1->symtree->n.sym);
4499 src = gfc_get_symbol_decl (expr2->symtree->n.sym);
4501 dtype = TREE_TYPE (dst);
4502 if (POINTER_TYPE_P (dtype))
4503 dtype = TREE_TYPE (dtype);
4504 stype = TREE_TYPE (src);
4505 if (POINTER_TYPE_P (stype))
4506 stype = TREE_TYPE (stype);
4508 if (!GFC_ARRAY_TYPE_P (dtype) || !GFC_ARRAY_TYPE_P (stype))
4511 /* Determine the lengths of the arrays. */
4512 dlen = GFC_TYPE_ARRAY_SIZE (dtype);
4513 if (!dlen || TREE_CODE (dlen) != INTEGER_CST)
4515 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (dtype));
4516 dlen = fold_build2 (MULT_EXPR, gfc_array_index_type, dlen,
4517 fold_convert (gfc_array_index_type, tmp));
4519 slen = GFC_TYPE_ARRAY_SIZE (stype);
4520 if (!slen || TREE_CODE (slen) != INTEGER_CST)
4522 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (stype));
4523 slen = fold_build2 (MULT_EXPR, gfc_array_index_type, slen,
4524 fold_convert (gfc_array_index_type, tmp));
4526 /* Sanity check that they are the same. This should always be
4527 the case, as we should already have checked for conformance. */
4528 if (!tree_int_cst_equal (slen, dlen))
4531 return gfc_build_memcpy_call (dst, src, dlen);
4535 /* Try to efficiently translate array(:) = (/ ... /). Return NULL if
4536 this can't be done. EXPR1 is the destination/lhs for which
4537 gfc_full_array_ref_p is true, and EXPR2 is the source/rhs. */
4540 gfc_trans_array_constructor_copy (gfc_expr * expr1, gfc_expr * expr2)
4542 unsigned HOST_WIDE_INT nelem;
4548 nelem = gfc_constant_array_constructor_p (expr2->value.constructor);
4552 dst = gfc_get_symbol_decl (expr1->symtree->n.sym);
4553 dtype = TREE_TYPE (dst);
4554 if (POINTER_TYPE_P (dtype))
4555 dtype = TREE_TYPE (dtype);
4556 if (!GFC_ARRAY_TYPE_P (dtype))
4559 /* Determine the lengths of the array. */
4560 len = GFC_TYPE_ARRAY_SIZE (dtype);
4561 if (!len || TREE_CODE (len) != INTEGER_CST)
4564 /* Confirm that the constructor is the same size. */
4565 if (compare_tree_int (len, nelem) != 0)
4568 tmp = TYPE_SIZE_UNIT (gfc_get_element_type (dtype));
4569 len = fold_build2 (MULT_EXPR, gfc_array_index_type, len,
4570 fold_convert (gfc_array_index_type, tmp));
4572 stype = gfc_typenode_for_spec (&expr2->ts);
4573 src = gfc_build_constant_array_constructor (expr2, stype);
4575 stype = TREE_TYPE (src);
4576 if (POINTER_TYPE_P (stype))
4577 stype = TREE_TYPE (stype);
4579 return gfc_build_memcpy_call (dst, src, len);
4583 /* Subroutine of gfc_trans_assignment that actually scalarizes the
4584 assignment. EXPR1 is the destination/RHS and EXPR2 is the source/LHS. */
4587 gfc_trans_assignment_1 (gfc_expr * expr1, gfc_expr * expr2, bool init_flag)
4592 gfc_ss *lss_section;
4599 bool scalar_to_array;
4602 /* Assignment of the form lhs = rhs. */
4603 gfc_start_block (&block);
4605 gfc_init_se (&lse, NULL);
4606 gfc_init_se (&rse, NULL);
4609 lss = gfc_walk_expr (expr1);
4611 if (lss != gfc_ss_terminator)
4613 /* Allow the scalarizer to workshare array assignments. */
4614 if (ompws_flags & OMPWS_WORKSHARE_FLAG)
4615 ompws_flags |= OMPWS_SCALARIZER_WS;
4617 /* The assignment needs scalarization. */
4620 /* Find a non-scalar SS from the lhs. */
4621 while (lss_section != gfc_ss_terminator
4622 && lss_section->type != GFC_SS_SECTION)
4623 lss_section = lss_section->next;
4625 gcc_assert (lss_section != gfc_ss_terminator);
4627 /* Initialize the scalarizer. */
4628 gfc_init_loopinfo (&loop);
4631 rss = gfc_walk_expr (expr2);
4632 if (rss == gfc_ss_terminator)
4634 /* The rhs is scalar. Add a ss for the expression. */
4635 rss = gfc_get_ss ();
4636 rss->next = gfc_ss_terminator;
4637 rss->type = GFC_SS_SCALAR;
4640 /* Associate the SS with the loop. */
4641 gfc_add_ss_to_loop (&loop, lss);
4642 gfc_add_ss_to_loop (&loop, rss);
4644 /* Calculate the bounds of the scalarization. */
4645 gfc_conv_ss_startstride (&loop);
4646 /* Resolve any data dependencies in the statement. */
4647 gfc_conv_resolve_dependencies (&loop, lss, rss);
4648 /* Setup the scalarizing loops. */
4649 gfc_conv_loop_setup (&loop, &expr2->where);
4651 /* Setup the gfc_se structures. */
4652 gfc_copy_loopinfo_to_se (&lse, &loop);
4653 gfc_copy_loopinfo_to_se (&rse, &loop);
4656 gfc_mark_ss_chain_used (rss, 1);
4657 if (loop.temp_ss == NULL)
4660 gfc_mark_ss_chain_used (lss, 1);
4664 lse.ss = loop.temp_ss;
4665 gfc_mark_ss_chain_used (lss, 3);
4666 gfc_mark_ss_chain_used (loop.temp_ss, 3);
4669 /* Start the scalarized loop body. */
4670 gfc_start_scalarized_body (&loop, &body);
4673 gfc_init_block (&body);
4675 l_is_temp = (lss != gfc_ss_terminator && loop.temp_ss != NULL);
4677 /* Translate the expression. */
4678 gfc_conv_expr (&rse, expr2);
4680 /* Stabilize a string length for temporaries. */
4681 if (expr2->ts.type == BT_CHARACTER)
4682 string_length = gfc_evaluate_now (rse.string_length, &rse.pre);
4684 string_length = NULL_TREE;
4688 gfc_conv_tmp_array_ref (&lse);
4689 gfc_advance_se_ss_chain (&lse);
4690 if (expr2->ts.type == BT_CHARACTER)
4691 lse.string_length = string_length;
4694 gfc_conv_expr (&lse, expr1);
4696 /* Assignments of scalar derived types with allocatable components
4697 to arrays must be done with a deep copy and the rhs temporary
4698 must have its components deallocated afterwards. */
4699 scalar_to_array = (expr2->ts.type == BT_DERIVED
4700 && expr2->ts.derived->attr.alloc_comp
4701 && expr2->expr_type != EXPR_VARIABLE
4702 && !gfc_is_constant_expr (expr2)
4703 && expr1->rank && !expr2->rank);
4704 if (scalar_to_array)
4706 tmp = gfc_deallocate_alloc_comp (expr2->ts.derived, rse.expr, 0);
4707 gfc_add_expr_to_block (&loop.post, tmp);
4710 tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts,
4711 l_is_temp || init_flag,
4712 (expr2->expr_type == EXPR_VARIABLE)
4713 || scalar_to_array);
4714 gfc_add_expr_to_block (&body, tmp);
4716 if (lss == gfc_ss_terminator)
4718 /* Use the scalar assignment as is. */
4719 gfc_add_block_to_block (&block, &body);
4723 gcc_assert (lse.ss == gfc_ss_terminator
4724 && rse.ss == gfc_ss_terminator);
4728 gfc_trans_scalarized_loop_boundary (&loop, &body);
4730 /* We need to copy the temporary to the actual lhs. */
4731 gfc_init_se (&lse, NULL);
4732 gfc_init_se (&rse, NULL);
4733 gfc_copy_loopinfo_to_se (&lse, &loop);
4734 gfc_copy_loopinfo_to_se (&rse, &loop);
4736 rse.ss = loop.temp_ss;
4739 gfc_conv_tmp_array_ref (&rse);
4740 gfc_advance_se_ss_chain (&rse);
4741 gfc_conv_expr (&lse, expr1);
4743 gcc_assert (lse.ss == gfc_ss_terminator
4744 && rse.ss == gfc_ss_terminator);
4746 if (expr2->ts.type == BT_CHARACTER)
4747 rse.string_length = string_length;
4749 tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts,
4751 gfc_add_expr_to_block (&body, tmp);
4754 /* Generate the copying loops. */
4755 gfc_trans_scalarizing_loops (&loop, &body);
4757 /* Wrap the whole thing up. */
4758 gfc_add_block_to_block (&block, &loop.pre);
4759 gfc_add_block_to_block (&block, &loop.post);
4761 gfc_cleanup_loop (&loop);
4764 return gfc_finish_block (&block);
4768 /* Check whether EXPR is a copyable array. */
4771 copyable_array_p (gfc_expr * expr)
4773 if (expr->expr_type != EXPR_VARIABLE)
4776 /* First check it's an array. */
4777 if (expr->rank < 1 || !expr->ref || expr->ref->next)
4780 if (!gfc_full_array_ref_p (expr->ref))
4783 /* Next check that it's of a simple enough type. */
4784 switch (expr->ts.type)
4796 return !expr->ts.derived->attr.alloc_comp;
4805 /* Translate an assignment. */
4808 gfc_trans_assignment (gfc_expr * expr1, gfc_expr * expr2, bool init_flag)
4812 /* Special case a single function returning an array. */
4813 if (expr2->expr_type == EXPR_FUNCTION && expr2->rank > 0)
4815 tmp = gfc_trans_arrayfunc_assign (expr1, expr2);
4820 /* Special case assigning an array to zero. */
4821 if (copyable_array_p (expr1)
4822 && is_zero_initializer_p (expr2))
4824 tmp = gfc_trans_zero_assign (expr1);
4829 /* Special case copying one array to another. */
4830 if (copyable_array_p (expr1)
4831 && copyable_array_p (expr2)
4832 && gfc_compare_types (&expr1->ts, &expr2->ts)
4833 && !gfc_check_dependency (expr1, expr2, 0))
4835 tmp = gfc_trans_array_copy (expr1, expr2);
4840 /* Special case initializing an array from a constant array constructor. */
4841 if (copyable_array_p (expr1)
4842 && expr2->expr_type == EXPR_ARRAY
4843 && gfc_compare_types (&expr1->ts, &expr2->ts))
4845 tmp = gfc_trans_array_constructor_copy (expr1, expr2);
4850 /* Fallback to the scalarizer to generate explicit loops. */
4851 return gfc_trans_assignment_1 (expr1, expr2, init_flag);
4855 gfc_trans_init_assign (gfc_code * code)
4857 return gfc_trans_assignment (code->expr1, code->expr2, true);
4861 gfc_trans_assign (gfc_code * code)
4863 return gfc_trans_assignment (code->expr1, code->expr2, false);