| /* Expression translation |
| Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
| Contributed by Paul Brook <paul@nowt.org> |
| and Steven Bosscher <s.bosscher@student.tudelft.nl> |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 2, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| /* trans-expr.c-- generate GENERIC trees for gfc_expr. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "tree.h" |
| #include "convert.h" |
| #include "ggc.h" |
| #include "toplev.h" |
| #include "real.h" |
| #include "tree-gimple.h" |
| #include "langhooks.h" |
| #include "flags.h" |
| #include "gfortran.h" |
| #include "trans.h" |
| #include "trans-const.h" |
| #include "trans-types.h" |
| #include "trans-array.h" |
| /* Only for gfc_trans_assign and gfc_trans_pointer_assign. */ |
| #include "trans-stmt.h" |
| #include "dependency.h" |
| |
| static tree gfc_trans_structure_assign (tree dest, gfc_expr * expr); |
| static void gfc_apply_interface_mapping_to_expr (gfc_interface_mapping *, |
| gfc_expr *); |
| |
| /* Copy the scalarization loop variables. */ |
| |
| static void |
| gfc_copy_se_loopvars (gfc_se * dest, gfc_se * src) |
| { |
| dest->ss = src->ss; |
| dest->loop = src->loop; |
| } |
| |
| |
| /* Initialize a simple expression holder. |
| |
| Care must be taken when multiple se are created with the same parent. |
| The child se must be kept in sync. The easiest way is to delay creation |
| of a child se until after after the previous se has been translated. */ |
| |
| void |
| gfc_init_se (gfc_se * se, gfc_se * parent) |
| { |
| memset (se, 0, sizeof (gfc_se)); |
| gfc_init_block (&se->pre); |
| gfc_init_block (&se->post); |
| |
| se->parent = parent; |
| |
| if (parent) |
| gfc_copy_se_loopvars (se, parent); |
| } |
| |
| |
| /* Advances to the next SS in the chain. Use this rather than setting |
| se->ss = se->ss->next because all the parents needs to be kept in sync. |
| See gfc_init_se. */ |
| |
| void |
| gfc_advance_se_ss_chain (gfc_se * se) |
| { |
| gfc_se *p; |
| |
| gcc_assert (se != NULL && se->ss != NULL && se->ss != gfc_ss_terminator); |
| |
| p = se; |
| /* Walk down the parent chain. */ |
| while (p != NULL) |
| { |
| /* Simple consistency check. */ |
| gcc_assert (p->parent == NULL || p->parent->ss == p->ss); |
| |
| p->ss = p->ss->next; |
| |
| p = p->parent; |
| } |
| } |
| |
| |
| /* Ensures the result of the expression as either a temporary variable |
| or a constant so that it can be used repeatedly. */ |
| |
| void |
| gfc_make_safe_expr (gfc_se * se) |
| { |
| tree var; |
| |
| if (CONSTANT_CLASS_P (se->expr)) |
| return; |
| |
| /* We need a temporary for this result. */ |
| var = gfc_create_var (TREE_TYPE (se->expr), NULL); |
| gfc_add_modify_expr (&se->pre, var, se->expr); |
| se->expr = var; |
| } |
| |
| |
| /* Return an expression which determines if a dummy parameter is present. |
| Also used for arguments to procedures with multiple entry points. */ |
| |
| tree |
| gfc_conv_expr_present (gfc_symbol * sym) |
| { |
| tree decl; |
| |
| gcc_assert (sym->attr.dummy); |
| |
| decl = gfc_get_symbol_decl (sym); |
| if (TREE_CODE (decl) != PARM_DECL) |
| { |
| /* Array parameters use a temporary descriptor, we want the real |
| parameter. */ |
| gcc_assert (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (decl)) |
| || GFC_ARRAY_TYPE_P (TREE_TYPE (decl))); |
| decl = GFC_DECL_SAVED_DESCRIPTOR (decl); |
| } |
| return build2 (NE_EXPR, boolean_type_node, decl, |
| fold_convert (TREE_TYPE (decl), null_pointer_node)); |
| } |
| |
| |
| /* Converts a missing, dummy argument into a null or zero. */ |
| |
| void |
| gfc_conv_missing_dummy (gfc_se * se, gfc_expr * arg, gfc_typespec ts) |
| { |
| tree present; |
| tree tmp; |
| |
| present = gfc_conv_expr_present (arg->symtree->n.sym); |
| tmp = build3 (COND_EXPR, TREE_TYPE (se->expr), present, se->expr, |
| fold_convert (TREE_TYPE (se->expr), integer_zero_node)); |
| |
| tmp = gfc_evaluate_now (tmp, &se->pre); |
| se->expr = tmp; |
| if (ts.type == BT_CHARACTER) |
| { |
| tmp = build_int_cst (gfc_charlen_type_node, 0); |
| tmp = build3 (COND_EXPR, gfc_charlen_type_node, present, |
| se->string_length, tmp); |
| tmp = gfc_evaluate_now (tmp, &se->pre); |
| se->string_length = tmp; |
| } |
| return; |
| } |
| |
| |
| /* Get the character length of an expression, looking through gfc_refs |
| if necessary. */ |
| |
| tree |
| gfc_get_expr_charlen (gfc_expr *e) |
| { |
| gfc_ref *r; |
| tree length; |
| |
| gcc_assert (e->expr_type == EXPR_VARIABLE |
| && e->ts.type == BT_CHARACTER); |
| |
| length = NULL; /* To silence compiler warning. */ |
| |
| /* First candidate: if the variable is of type CHARACTER, the |
| expression's length could be the length of the character |
| variable. */ |
| if (e->symtree->n.sym->ts.type == BT_CHARACTER) |
| length = e->symtree->n.sym->ts.cl->backend_decl; |
| |
| /* Look through the reference chain for component references. */ |
| for (r = e->ref; r; r = r->next) |
| { |
| switch (r->type) |
| { |
| case REF_COMPONENT: |
| if (r->u.c.component->ts.type == BT_CHARACTER) |
| length = r->u.c.component->ts.cl->backend_decl; |
| break; |
| |
| case REF_ARRAY: |
| /* Do nothing. */ |
| break; |
| |
| default: |
| /* We should never got substring references here. These will be |
| broken down by the scalarizer. */ |
| gcc_unreachable (); |
| } |
| } |
| |
| gcc_assert (length != NULL); |
| return length; |
| } |
| |
| |
| |
| /* Generate code to initialize a string length variable. Returns the |
| value. */ |
| |
| void |
| gfc_trans_init_string_length (gfc_charlen * cl, stmtblock_t * pblock) |
| { |
| gfc_se se; |
| tree tmp; |
| |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr_type (&se, cl->length, gfc_charlen_type_node); |
| gfc_add_block_to_block (pblock, &se.pre); |
| |
| tmp = cl->backend_decl; |
| gfc_add_modify_expr (pblock, tmp, se.expr); |
| } |
| |
| |
| static void |
| gfc_conv_substring (gfc_se * se, gfc_ref * ref, int kind) |
| { |
| tree tmp; |
| tree type; |
| tree var; |
| gfc_se start; |
| gfc_se end; |
| |
| type = gfc_get_character_type (kind, ref->u.ss.length); |
| type = build_pointer_type (type); |
| |
| var = NULL_TREE; |
| gfc_init_se (&start, se); |
| gfc_conv_expr_type (&start, ref->u.ss.start, gfc_charlen_type_node); |
| gfc_add_block_to_block (&se->pre, &start.pre); |
| |
| if (integer_onep (start.expr)) |
| gfc_conv_string_parameter (se); |
| else |
| { |
| /* Avoid multiple evaluation of substring start. */ |
| if (!CONSTANT_CLASS_P (start.expr) && !DECL_P (start.expr)) |
| start.expr = gfc_evaluate_now (start.expr, &se->pre); |
| |
| /* Change the start of the string. */ |
| if (TYPE_STRING_FLAG (TREE_TYPE (se->expr))) |
| tmp = se->expr; |
| else |
| tmp = build_fold_indirect_ref (se->expr); |
| tmp = gfc_build_array_ref (tmp, start.expr); |
| se->expr = gfc_build_addr_expr (type, tmp); |
| } |
| |
| /* Length = end + 1 - start. */ |
| gfc_init_se (&end, se); |
| if (ref->u.ss.end == NULL) |
| end.expr = se->string_length; |
| else |
| { |
| gfc_conv_expr_type (&end, ref->u.ss.end, gfc_charlen_type_node); |
| gfc_add_block_to_block (&se->pre, &end.pre); |
| } |
| |
| if (!CONSTANT_CLASS_P (end.expr) && !DECL_P (end.expr)) |
| end.expr = gfc_evaluate_now (end.expr, &se->pre); |
| |
| tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, |
| build_int_cst (gfc_charlen_type_node, 1), |
| start.expr); |
| tmp = fold_build2 (PLUS_EXPR, gfc_charlen_type_node, end.expr, tmp); |
| tmp = fold_build2 (MAX_EXPR, gfc_charlen_type_node, tmp, |
| build_int_cst (gfc_charlen_type_node, 0)); |
| se->string_length = tmp; |
| } |
| |
| |
| /* Convert a derived type component reference. */ |
| |
| static void |
| gfc_conv_component_ref (gfc_se * se, gfc_ref * ref) |
| { |
| gfc_component *c; |
| tree tmp; |
| tree decl; |
| tree field; |
| |
| c = ref->u.c.component; |
| |
| gcc_assert (c->backend_decl); |
| |
| field = c->backend_decl; |
| gcc_assert (TREE_CODE (field) == FIELD_DECL); |
| decl = se->expr; |
| tmp = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE); |
| |
| se->expr = tmp; |
| |
| if (c->ts.type == BT_CHARACTER) |
| { |
| tmp = c->ts.cl->backend_decl; |
| /* Components must always be constant length. */ |
| gcc_assert (tmp && INTEGER_CST_P (tmp)); |
| se->string_length = tmp; |
| } |
| |
| if (c->pointer && c->dimension == 0 && c->ts.type != BT_CHARACTER) |
| se->expr = build_fold_indirect_ref (se->expr); |
| } |
| |
| |
| /* Return the contents of a variable. Also handles reference/pointer |
| variables (all Fortran pointer references are implicit). */ |
| |
| static void |
| gfc_conv_variable (gfc_se * se, gfc_expr * expr) |
| { |
| gfc_ref *ref; |
| gfc_symbol *sym; |
| tree parent_decl; |
| int parent_flag; |
| bool return_value; |
| bool alternate_entry; |
| bool entry_master; |
| |
| sym = expr->symtree->n.sym; |
| if (se->ss != NULL) |
| { |
| /* Check that something hasn't gone horribly wrong. */ |
| gcc_assert (se->ss != gfc_ss_terminator); |
| gcc_assert (se->ss->expr == expr); |
| |
| /* A scalarized term. We already know the descriptor. */ |
| se->expr = se->ss->data.info.descriptor; |
| se->string_length = se->ss->string_length; |
| for (ref = se->ss->data.info.ref; ref; ref = ref->next) |
| if (ref->type == REF_ARRAY && ref->u.ar.type != AR_ELEMENT) |
| break; |
| } |
| else |
| { |
| tree se_expr = NULL_TREE; |
| |
| se->expr = gfc_get_symbol_decl (sym); |
| |
| /* Deal with references to a parent results or entries by storing |
| the current_function_decl and moving to the parent_decl. */ |
| return_value = sym->attr.function && sym->result == sym; |
| alternate_entry = sym->attr.function && sym->attr.entry |
| && sym->result == sym; |
| entry_master = sym->attr.result |
| && sym->ns->proc_name->attr.entry_master |
| && !gfc_return_by_reference (sym->ns->proc_name); |
| parent_decl = DECL_CONTEXT (current_function_decl); |
| |
| if ((se->expr == parent_decl && return_value) |
| || (sym->ns && sym->ns->proc_name |
| && parent_decl |
| && sym->ns->proc_name->backend_decl == parent_decl |
| && (alternate_entry || entry_master))) |
| parent_flag = 1; |
| else |
| parent_flag = 0; |
| |
| /* Special case for assigning the return value of a function. |
| Self recursive functions must have an explicit return value. */ |
| if (return_value && (se->expr == current_function_decl || parent_flag)) |
| se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
| |
| /* Similarly for alternate entry points. */ |
| else if (alternate_entry |
| && (sym->ns->proc_name->backend_decl == current_function_decl |
| || parent_flag)) |
| { |
| gfc_entry_list *el = NULL; |
| |
| for (el = sym->ns->entries; el; el = el->next) |
| if (sym == el->sym) |
| { |
| se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
| break; |
| } |
| } |
| |
| else if (entry_master |
| && (sym->ns->proc_name->backend_decl == current_function_decl |
| || parent_flag)) |
| se_expr = gfc_get_fake_result_decl (sym, parent_flag); |
| |
| if (se_expr) |
| se->expr = se_expr; |
| |
| /* Procedure actual arguments. */ |
| else if (sym->attr.flavor == FL_PROCEDURE |
| && se->expr != current_function_decl) |
| { |
| gcc_assert (se->want_pointer); |
| if (!sym->attr.dummy) |
| { |
| gcc_assert (TREE_CODE (se->expr) == FUNCTION_DECL); |
| se->expr = build_fold_addr_expr (se->expr); |
| } |
| return; |
| } |
| |
| |
| /* Dereference the expression, where needed. Since characters |
| are entirely different from other types, they are treated |
| separately. */ |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| /* Dereference character pointer dummy arguments |
| or results. */ |
| if ((sym->attr.pointer || sym->attr.allocatable) |
| && (sym->attr.dummy |
| || sym->attr.function |
| || sym->attr.result)) |
| se->expr = build_fold_indirect_ref (se->expr); |
| } |
| else |
| { |
| /* Dereference non-character scalar dummy arguments. */ |
| if (sym->attr.dummy && !sym->attr.dimension) |
| se->expr = build_fold_indirect_ref (se->expr); |
| |
| /* Dereference scalar hidden result. */ |
| if (gfc_option.flag_f2c && sym->ts.type == BT_COMPLEX |
| && (sym->attr.function || sym->attr.result) |
| && !sym->attr.dimension && !sym->attr.pointer) |
| se->expr = build_fold_indirect_ref (se->expr); |
| |
| /* Dereference non-character pointer variables. |
| These must be dummies, results, or scalars. */ |
| if ((sym->attr.pointer || sym->attr.allocatable) |
| && (sym->attr.dummy |
| || sym->attr.function |
| || sym->attr.result |
| || !sym->attr.dimension)) |
| se->expr = build_fold_indirect_ref (se->expr); |
| } |
| |
| ref = expr->ref; |
| } |
| |
| /* For character variables, also get the length. */ |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| /* If the character length of an entry isn't set, get the length from |
| the master function instead. */ |
| if (sym->attr.entry && !sym->ts.cl->backend_decl) |
| se->string_length = sym->ns->proc_name->ts.cl->backend_decl; |
| else |
| se->string_length = sym->ts.cl->backend_decl; |
| gcc_assert (se->string_length); |
| } |
| |
| while (ref) |
| { |
| switch (ref->type) |
| { |
| case REF_ARRAY: |
| /* Return the descriptor if that's what we want and this is an array |
| section reference. */ |
| if (se->descriptor_only && ref->u.ar.type != AR_ELEMENT) |
| return; |
| /* TODO: Pointers to single elements of array sections, eg elemental subs. */ |
| /* Return the descriptor for array pointers and allocations. */ |
| if (se->want_pointer |
| && ref->next == NULL && (se->descriptor_only)) |
| return; |
| |
| gfc_conv_array_ref (se, &ref->u.ar, sym, &expr->where); |
| /* Return a pointer to an element. */ |
| break; |
| |
| case REF_COMPONENT: |
| gfc_conv_component_ref (se, ref); |
| break; |
| |
| case REF_SUBSTRING: |
| gfc_conv_substring (se, ref, expr->ts.kind); |
| break; |
| |
| default: |
| gcc_unreachable (); |
| break; |
| } |
| ref = ref->next; |
| } |
| /* Pointer assignment, allocation or pass by reference. Arrays are handled |
| separately. */ |
| if (se->want_pointer) |
| { |
| if (expr->ts.type == BT_CHARACTER) |
| gfc_conv_string_parameter (se); |
| else |
| se->expr = build_fold_addr_expr (se->expr); |
| } |
| } |
| |
| |
| /* Unary ops are easy... Or they would be if ! was a valid op. */ |
| |
| static void |
| gfc_conv_unary_op (enum tree_code code, gfc_se * se, gfc_expr * expr) |
| { |
| gfc_se operand; |
| tree type; |
| |
| gcc_assert (expr->ts.type != BT_CHARACTER); |
| /* Initialize the operand. */ |
| gfc_init_se (&operand, se); |
| gfc_conv_expr_val (&operand, expr->value.op.op1); |
| gfc_add_block_to_block (&se->pre, &operand.pre); |
| |
| type = gfc_typenode_for_spec (&expr->ts); |
| |
| /* TRUTH_NOT_EXPR is not a "true" unary operator in GCC. |
| We must convert it to a compare to 0 (e.g. EQ_EXPR (op1, 0)). |
| All other unary operators have an equivalent GIMPLE unary operator. */ |
| if (code == TRUTH_NOT_EXPR) |
| se->expr = build2 (EQ_EXPR, type, operand.expr, |
| build_int_cst (type, 0)); |
| else |
| se->expr = build1 (code, type, operand.expr); |
| |
| } |
| |
| /* Expand power operator to optimal multiplications when a value is raised |
| to a constant integer n. See section 4.6.3, "Evaluation of Powers" of |
| Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art of Computer |
| Programming", 3rd Edition, 1998. */ |
| |
| /* This code is mostly duplicated from expand_powi in the backend. |
| We establish the "optimal power tree" lookup table with the defined size. |
| The items in the table are the exponents used to calculate the index |
| exponents. Any integer n less than the value can get an "addition chain", |
| with the first node being one. */ |
| #define POWI_TABLE_SIZE 256 |
| |
| /* The table is from builtins.c. */ |
| static const unsigned char powi_table[POWI_TABLE_SIZE] = |
| { |
| 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */ |
| 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */ |
| 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */ |
| 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */ |
| 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */ |
| 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */ |
| 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */ |
| 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */ |
| 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */ |
| 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */ |
| 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */ |
| 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */ |
| 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */ |
| 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */ |
| 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */ |
| 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */ |
| 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */ |
| 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */ |
| 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */ |
| 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */ |
| 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */ |
| 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */ |
| 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */ |
| 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */ |
| 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */ |
| 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */ |
| 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */ |
| 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */ |
| 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */ |
| 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */ |
| 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */ |
| 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */ |
| }; |
| |
| /* If n is larger than lookup table's max index, we use the "window |
| method". */ |
| #define POWI_WINDOW_SIZE 3 |
| |
| /* Recursive function to expand the power operator. The temporary |
| values are put in tmpvar. The function returns tmpvar[1] ** n. */ |
| static tree |
| gfc_conv_powi (gfc_se * se, int n, tree * tmpvar) |
| { |
| tree op0; |
| tree op1; |
| tree tmp; |
| int digit; |
| |
| if (n < POWI_TABLE_SIZE) |
| { |
| if (tmpvar[n]) |
| return tmpvar[n]; |
| |
| op0 = gfc_conv_powi (se, n - powi_table[n], tmpvar); |
| op1 = gfc_conv_powi (se, powi_table[n], tmpvar); |
| } |
| else if (n & 1) |
| { |
| digit = n & ((1 << POWI_WINDOW_SIZE) - 1); |
| op0 = gfc_conv_powi (se, n - digit, tmpvar); |
| op1 = gfc_conv_powi (se, digit, tmpvar); |
| } |
| else |
| { |
| op0 = gfc_conv_powi (se, n >> 1, tmpvar); |
| op1 = op0; |
| } |
| |
| tmp = fold_build2 (MULT_EXPR, TREE_TYPE (op0), op0, op1); |
| tmp = gfc_evaluate_now (tmp, &se->pre); |
| |
| if (n < POWI_TABLE_SIZE) |
| tmpvar[n] = tmp; |
| |
| return tmp; |
| } |
| |
| |
| /* Expand lhs ** rhs. rhs is a constant integer. If it expands successfully, |
| return 1. Else return 0 and a call to runtime library functions |
| will have to be built. */ |
| static int |
| gfc_conv_cst_int_power (gfc_se * se, tree lhs, tree rhs) |
| { |
| tree cond; |
| tree tmp; |
| tree type; |
| tree vartmp[POWI_TABLE_SIZE]; |
| int n; |
| int sgn; |
| |
| type = TREE_TYPE (lhs); |
| n = abs (TREE_INT_CST_LOW (rhs)); |
| sgn = tree_int_cst_sgn (rhs); |
| |
| if (((FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations) || optimize_size) |
| && (n > 2 || n < -1)) |
| return 0; |
| |
| /* rhs == 0 */ |
| if (sgn == 0) |
| { |
| se->expr = gfc_build_const (type, integer_one_node); |
| return 1; |
| } |
| /* If rhs < 0 and lhs is an integer, the result is -1, 0 or 1. */ |
| if ((sgn == -1) && (TREE_CODE (type) == INTEGER_TYPE)) |
| { |
| tmp = build2 (EQ_EXPR, boolean_type_node, lhs, |
| build_int_cst (TREE_TYPE (lhs), -1)); |
| cond = build2 (EQ_EXPR, boolean_type_node, lhs, |
| build_int_cst (TREE_TYPE (lhs), 1)); |
| |
| /* If rhs is even, |
| result = (lhs == 1 || lhs == -1) ? 1 : 0. */ |
| if ((n & 1) == 0) |
| { |
| tmp = build2 (TRUTH_OR_EXPR, boolean_type_node, tmp, cond); |
| se->expr = build3 (COND_EXPR, type, tmp, build_int_cst (type, 1), |
| build_int_cst (type, 0)); |
| return 1; |
| } |
| /* If rhs is odd, |
| result = (lhs == 1) ? 1 : (lhs == -1) ? -1 : 0. */ |
| tmp = build3 (COND_EXPR, type, tmp, build_int_cst (type, -1), |
| build_int_cst (type, 0)); |
| se->expr = build3 (COND_EXPR, type, cond, build_int_cst (type, 1), tmp); |
| return 1; |
| } |
| |
| memset (vartmp, 0, sizeof (vartmp)); |
| vartmp[1] = lhs; |
| if (sgn == -1) |
| { |
| tmp = gfc_build_const (type, integer_one_node); |
| vartmp[1] = build2 (RDIV_EXPR, type, tmp, vartmp[1]); |
| } |
| |
| se->expr = gfc_conv_powi (se, n, vartmp); |
| |
| return 1; |
| } |
| |
| |
| /* Power op (**). Constant integer exponent has special handling. */ |
| |
| static void |
| gfc_conv_power_op (gfc_se * se, gfc_expr * expr) |
| { |
| tree gfc_int4_type_node; |
| int kind; |
| int ikind; |
| gfc_se lse; |
| gfc_se rse; |
| tree fndecl; |
| tree tmp; |
| |
| gfc_init_se (&lse, se); |
| gfc_conv_expr_val (&lse, expr->value.op.op1); |
| lse.expr = gfc_evaluate_now (lse.expr, &lse.pre); |
| gfc_add_block_to_block (&se->pre, &lse.pre); |
| |
| gfc_init_se (&rse, se); |
| gfc_conv_expr_val (&rse, expr->value.op.op2); |
| gfc_add_block_to_block (&se->pre, &rse.pre); |
| |
| if (expr->value.op.op2->ts.type == BT_INTEGER |
| && expr->value.op.op2->expr_type == EXPR_CONSTANT) |
| if (gfc_conv_cst_int_power (se, lse.expr, rse.expr)) |
| return; |
| |
| gfc_int4_type_node = gfc_get_int_type (4); |
| |
| kind = expr->value.op.op1->ts.kind; |
| switch (expr->value.op.op2->ts.type) |
| { |
| case BT_INTEGER: |
| ikind = expr->value.op.op2->ts.kind; |
| switch (ikind) |
| { |
| case 1: |
| case 2: |
| rse.expr = convert (gfc_int4_type_node, rse.expr); |
| /* Fall through. */ |
| |
| case 4: |
| ikind = 0; |
| break; |
| |
| case 8: |
| ikind = 1; |
| break; |
| |
| case 16: |
| ikind = 2; |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| switch (kind) |
| { |
| case 1: |
| case 2: |
| if (expr->value.op.op1->ts.type == BT_INTEGER) |
| lse.expr = convert (gfc_int4_type_node, lse.expr); |
| else |
| gcc_unreachable (); |
| /* Fall through. */ |
| |
| case 4: |
| kind = 0; |
| break; |
| |
| case 8: |
| kind = 1; |
| break; |
| |
| case 10: |
| kind = 2; |
| break; |
| |
| case 16: |
| kind = 3; |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| |
| switch (expr->value.op.op1->ts.type) |
| { |
| case BT_INTEGER: |
| if (kind == 3) /* Case 16 was not handled properly above. */ |
| kind = 2; |
| fndecl = gfor_fndecl_math_powi[kind][ikind].integer; |
| break; |
| |
| case BT_REAL: |
| fndecl = gfor_fndecl_math_powi[kind][ikind].real; |
| break; |
| |
| case BT_COMPLEX: |
| fndecl = gfor_fndecl_math_powi[kind][ikind].cmplx; |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| break; |
| |
| case BT_REAL: |
| switch (kind) |
| { |
| case 4: |
| fndecl = built_in_decls[BUILT_IN_POWF]; |
| break; |
| case 8: |
| fndecl = built_in_decls[BUILT_IN_POW]; |
| break; |
| case 10: |
| case 16: |
| fndecl = built_in_decls[BUILT_IN_POWL]; |
| break; |
| default: |
| gcc_unreachable (); |
| } |
| break; |
| |
| case BT_COMPLEX: |
| switch (kind) |
| { |
| case 4: |
| fndecl = gfor_fndecl_math_cpowf; |
| break; |
| case 8: |
| fndecl = gfor_fndecl_math_cpow; |
| break; |
| case 10: |
| fndecl = gfor_fndecl_math_cpowl10; |
| break; |
| case 16: |
| fndecl = gfor_fndecl_math_cpowl16; |
| break; |
| default: |
| gcc_unreachable (); |
| } |
| break; |
| |
| default: |
| gcc_unreachable (); |
| break; |
| } |
| |
| tmp = gfc_chainon_list (NULL_TREE, lse.expr); |
| tmp = gfc_chainon_list (tmp, rse.expr); |
| se->expr = build_function_call_expr (fndecl, tmp); |
| } |
| |
| |
| /* Generate code to allocate a string temporary. */ |
| |
| tree |
| gfc_conv_string_tmp (gfc_se * se, tree type, tree len) |
| { |
| tree var; |
| tree tmp; |
| tree args; |
| |
| gcc_assert (TREE_TYPE (len) == gfc_charlen_type_node); |
| |
| if (gfc_can_put_var_on_stack (len)) |
| { |
| /* Create a temporary variable to hold the result. */ |
| tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, |
| build_int_cst (gfc_charlen_type_node, 1)); |
| tmp = build_range_type (gfc_array_index_type, gfc_index_zero_node, tmp); |
| tmp = build_array_type (gfc_character1_type_node, tmp); |
| var = gfc_create_var (tmp, "str"); |
| var = gfc_build_addr_expr (type, var); |
| } |
| else |
| { |
| /* Allocate a temporary to hold the result. */ |
| var = gfc_create_var (type, "pstr"); |
| args = gfc_chainon_list (NULL_TREE, len); |
| tmp = build_function_call_expr (gfor_fndecl_internal_malloc, args); |
| tmp = convert (type, tmp); |
| gfc_add_modify_expr (&se->pre, var, tmp); |
| |
| /* Free the temporary afterwards. */ |
| tmp = convert (pvoid_type_node, var); |
| args = gfc_chainon_list (NULL_TREE, tmp); |
| tmp = build_function_call_expr (gfor_fndecl_internal_free, args); |
| gfc_add_expr_to_block (&se->post, tmp); |
| } |
| |
| return var; |
| } |
| |
| |
| /* Handle a string concatenation operation. A temporary will be allocated to |
| hold the result. */ |
| |
| static void |
| gfc_conv_concat_op (gfc_se * se, gfc_expr * expr) |
| { |
| gfc_se lse; |
| gfc_se rse; |
| tree len; |
| tree type; |
| tree var; |
| tree args; |
| tree tmp; |
| |
| gcc_assert (expr->value.op.op1->ts.type == BT_CHARACTER |
| && expr->value.op.op2->ts.type == BT_CHARACTER); |
| |
| gfc_init_se (&lse, se); |
| gfc_conv_expr (&lse, expr->value.op.op1); |
| gfc_conv_string_parameter (&lse); |
| gfc_init_se (&rse, se); |
| gfc_conv_expr (&rse, expr->value.op.op2); |
| gfc_conv_string_parameter (&rse); |
| |
| gfc_add_block_to_block (&se->pre, &lse.pre); |
| gfc_add_block_to_block (&se->pre, &rse.pre); |
| |
| type = gfc_get_character_type (expr->ts.kind, expr->ts.cl); |
| len = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
| if (len == NULL_TREE) |
| { |
| len = fold_build2 (PLUS_EXPR, TREE_TYPE (lse.string_length), |
| lse.string_length, rse.string_length); |
| } |
| |
| type = build_pointer_type (type); |
| |
| var = gfc_conv_string_tmp (se, type, len); |
| |
| /* Do the actual concatenation. */ |
| args = NULL_TREE; |
| args = gfc_chainon_list (args, len); |
| args = gfc_chainon_list (args, var); |
| args = gfc_chainon_list (args, lse.string_length); |
| args = gfc_chainon_list (args, lse.expr); |
| args = gfc_chainon_list (args, rse.string_length); |
| args = gfc_chainon_list (args, rse.expr); |
| tmp = build_function_call_expr (gfor_fndecl_concat_string, args); |
| gfc_add_expr_to_block (&se->pre, tmp); |
| |
| /* Add the cleanup for the operands. */ |
| gfc_add_block_to_block (&se->pre, &rse.post); |
| gfc_add_block_to_block (&se->pre, &lse.post); |
| |
| se->expr = var; |
| se->string_length = len; |
| } |
| |
| /* Translates an op expression. Common (binary) cases are handled by this |
| function, others are passed on. Recursion is used in either case. |
| We use the fact that (op1.ts == op2.ts) (except for the power |
| operator **). |
| Operators need no special handling for scalarized expressions as long as |
| they call gfc_conv_simple_val to get their operands. |
| Character strings get special handling. */ |
| |
| static void |
| gfc_conv_expr_op (gfc_se * se, gfc_expr * expr) |
| { |
| enum tree_code code; |
| gfc_se lse; |
| gfc_se rse; |
| tree type; |
| tree tmp; |
| int lop; |
| int checkstring; |
| |
| checkstring = 0; |
| lop = 0; |
| switch (expr->value.op.operator) |
| { |
| case INTRINSIC_UPLUS: |
| case INTRINSIC_PARENTHESES: |
| gfc_conv_expr (se, expr->value.op.op1); |
| return; |
| |
| case INTRINSIC_UMINUS: |
| gfc_conv_unary_op (NEGATE_EXPR, se, expr); |
| return; |
| |
| case INTRINSIC_NOT: |
| gfc_conv_unary_op (TRUTH_NOT_EXPR, se, expr); |
| return; |
| |
| case INTRINSIC_PLUS: |
| code = PLUS_EXPR; |
| break; |
| |
| case INTRINSIC_MINUS: |
| code = MINUS_EXPR; |
| break; |
| |
| case INTRINSIC_TIMES: |
| code = MULT_EXPR; |
| break; |
| |
| case INTRINSIC_DIVIDE: |
| /* If expr is a real or complex expr, use an RDIV_EXPR. If op1 is |
| an integer, we must round towards zero, so we use a |
| TRUNC_DIV_EXPR. */ |
| if (expr->ts.type == BT_INTEGER) |
| code = TRUNC_DIV_EXPR; |
| else |
| code = RDIV_EXPR; |
| break; |
| |
| case INTRINSIC_POWER: |
| gfc_conv_power_op (se, expr); |
| return; |
| |
| case INTRINSIC_CONCAT: |
| gfc_conv_concat_op (se, expr); |
| return; |
| |
| case INTRINSIC_AND: |
| code = TRUTH_ANDIF_EXPR; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_OR: |
| code = TRUTH_ORIF_EXPR; |
| lop = 1; |
| break; |
| |
| /* EQV and NEQV only work on logicals, but since we represent them |
| as integers, we can use EQ_EXPR and NE_EXPR for them in GIMPLE. */ |
| case INTRINSIC_EQ: |
| case INTRINSIC_EQV: |
| code = EQ_EXPR; |
| checkstring = 1; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_NE: |
| case INTRINSIC_NEQV: |
| code = NE_EXPR; |
| checkstring = 1; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_GT: |
| code = GT_EXPR; |
| checkstring = 1; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_GE: |
| code = GE_EXPR; |
| checkstring = 1; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_LT: |
| code = LT_EXPR; |
| checkstring = 1; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_LE: |
| code = LE_EXPR; |
| checkstring = 1; |
| lop = 1; |
| break; |
| |
| case INTRINSIC_USER: |
| case INTRINSIC_ASSIGN: |
| /* These should be converted into function calls by the frontend. */ |
| gcc_unreachable (); |
| |
| default: |
| fatal_error ("Unknown intrinsic op"); |
| return; |
| } |
| |
| /* The only exception to this is **, which is handled separately anyway. */ |
| gcc_assert (expr->value.op.op1->ts.type == expr->value.op.op2->ts.type); |
| |
| if (checkstring && expr->value.op.op1->ts.type != BT_CHARACTER) |
| checkstring = 0; |
| |
| /* lhs */ |
| gfc_init_se (&lse, se); |
| gfc_conv_expr (&lse, expr->value.op.op1); |
| gfc_add_block_to_block (&se->pre, &lse.pre); |
| |
| /* rhs */ |
| gfc_init_se (&rse, se); |
| gfc_conv_expr (&rse, expr->value.op.op2); |
| gfc_add_block_to_block (&se->pre, &rse.pre); |
| |
| if (checkstring) |
| { |
| gfc_conv_string_parameter (&lse); |
| gfc_conv_string_parameter (&rse); |
| |
| lse.expr = gfc_build_compare_string (lse.string_length, lse.expr, |
| rse.string_length, rse.expr); |
| rse.expr = integer_zero_node; |
| gfc_add_block_to_block (&lse.post, &rse.post); |
| } |
| |
| type = gfc_typenode_for_spec (&expr->ts); |
| |
| if (lop) |
| { |
| /* The result of logical ops is always boolean_type_node. */ |
| tmp = fold_build2 (code, type, lse.expr, rse.expr); |
| se->expr = convert (type, tmp); |
| } |
| else |
| se->expr = fold_build2 (code, type, lse.expr, rse.expr); |
| |
| /* Add the post blocks. */ |
| gfc_add_block_to_block (&se->post, &rse.post); |
| gfc_add_block_to_block (&se->post, &lse.post); |
| } |
| |
| /* If a string's length is one, we convert it to a single character. */ |
| |
| static tree |
| gfc_to_single_character (tree len, tree str) |
| { |
| gcc_assert (POINTER_TYPE_P (TREE_TYPE (str))); |
| |
| if (INTEGER_CST_P (len) && TREE_INT_CST_LOW (len) == 1 |
| && TREE_INT_CST_HIGH (len) == 0) |
| { |
| str = fold_convert (pchar_type_node, str); |
| return build_fold_indirect_ref (str); |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Compare two strings. If they are all single characters, the result is the |
| subtraction of them. Otherwise, we build a library call. */ |
| |
| tree |
| gfc_build_compare_string (tree len1, tree str1, tree len2, tree str2) |
| { |
| tree sc1; |
| tree sc2; |
| tree type; |
| tree tmp; |
| |
| gcc_assert (POINTER_TYPE_P (TREE_TYPE (str1))); |
| gcc_assert (POINTER_TYPE_P (TREE_TYPE (str2))); |
| |
| type = gfc_get_int_type (gfc_default_integer_kind); |
| |
| sc1 = gfc_to_single_character (len1, str1); |
| sc2 = gfc_to_single_character (len2, str2); |
| |
| /* Deal with single character specially. */ |
| if (sc1 != NULL_TREE && sc2 != NULL_TREE) |
| { |
| sc1 = fold_convert (type, sc1); |
| sc2 = fold_convert (type, sc2); |
| tmp = fold_build2 (MINUS_EXPR, type, sc1, sc2); |
| } |
| else |
| { |
| tmp = NULL_TREE; |
| tmp = gfc_chainon_list (tmp, len1); |
| tmp = gfc_chainon_list (tmp, str1); |
| tmp = gfc_chainon_list (tmp, len2); |
| tmp = gfc_chainon_list (tmp, str2); |
| |
| /* Build a call for the comparison. */ |
| tmp = build_function_call_expr (gfor_fndecl_compare_string, tmp); |
| } |
| |
| return tmp; |
| } |
| |
| static void |
| gfc_conv_function_val (gfc_se * se, gfc_symbol * sym) |
| { |
| tree tmp; |
| |
| if (sym->attr.dummy) |
| { |
| tmp = gfc_get_symbol_decl (sym); |
| gcc_assert (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE |
| && TREE_CODE (TREE_TYPE (TREE_TYPE (tmp))) == FUNCTION_TYPE); |
| } |
| else |
| { |
| if (!sym->backend_decl) |
| sym->backend_decl = gfc_get_extern_function_decl (sym); |
| |
| tmp = sym->backend_decl; |
| if (sym->attr.cray_pointee) |
| tmp = convert (build_pointer_type (TREE_TYPE (tmp)), |
| gfc_get_symbol_decl (sym->cp_pointer)); |
| if (!POINTER_TYPE_P (TREE_TYPE (tmp))) |
| { |
| gcc_assert (TREE_CODE (tmp) == FUNCTION_DECL); |
| tmp = build_fold_addr_expr (tmp); |
| } |
| } |
| se->expr = tmp; |
| } |
| |
| |
| /* Translate the call for an elemental subroutine call used in an operator |
| assignment. This is a simplified version of gfc_conv_function_call. */ |
| |
| tree |
| gfc_conv_operator_assign (gfc_se *lse, gfc_se *rse, gfc_symbol *sym) |
| { |
| tree args; |
| tree tmp; |
| gfc_se se; |
| stmtblock_t block; |
| |
| /* Only elemental subroutines with two arguments. */ |
| gcc_assert (sym->attr.elemental && sym->attr.subroutine); |
| gcc_assert (sym->formal->next->next == NULL); |
| |
| gfc_init_block (&block); |
| |
| gfc_add_block_to_block (&block, &lse->pre); |
| gfc_add_block_to_block (&block, &rse->pre); |
| |
| /* Build the argument list for the call, including hidden string lengths. */ |
| args = gfc_chainon_list (NULL_TREE, build_fold_addr_expr (lse->expr)); |
| args = gfc_chainon_list (args, build_fold_addr_expr (rse->expr)); |
| if (lse->string_length != NULL_TREE) |
| args = gfc_chainon_list (args, lse->string_length); |
| if (rse->string_length != NULL_TREE) |
| args = gfc_chainon_list (args, rse->string_length); |
| |
| /* Build the function call. */ |
| gfc_init_se (&se, NULL); |
| gfc_conv_function_val (&se, sym); |
| tmp = TREE_TYPE (TREE_TYPE (TREE_TYPE (se.expr))); |
| tmp = build3 (CALL_EXPR, tmp, se.expr, args, NULL_TREE); |
| gfc_add_expr_to_block (&block, tmp); |
| |
| gfc_add_block_to_block (&block, &lse->post); |
| gfc_add_block_to_block (&block, &rse->post); |
| |
| return gfc_finish_block (&block); |
| } |
| |
| |
| /* Initialize MAPPING. */ |
| |
| void |
| gfc_init_interface_mapping (gfc_interface_mapping * mapping) |
| { |
| mapping->syms = NULL; |
| mapping->charlens = NULL; |
| } |
| |
| |
| /* Free all memory held by MAPPING (but not MAPPING itself). */ |
| |
| void |
| gfc_free_interface_mapping (gfc_interface_mapping * mapping) |
| { |
| gfc_interface_sym_mapping *sym; |
| gfc_interface_sym_mapping *nextsym; |
| gfc_charlen *cl; |
| gfc_charlen *nextcl; |
| |
| for (sym = mapping->syms; sym; sym = nextsym) |
| { |
| nextsym = sym->next; |
| gfc_free_symbol (sym->new->n.sym); |
| gfc_free (sym->new); |
| gfc_free (sym); |
| } |
| for (cl = mapping->charlens; cl; cl = nextcl) |
| { |
| nextcl = cl->next; |
| gfc_free_expr (cl->length); |
| gfc_free (cl); |
| } |
| } |
| |
| |
| /* Return a copy of gfc_charlen CL. Add the returned structure to |
| MAPPING so that it will be freed by gfc_free_interface_mapping. */ |
| |
| static gfc_charlen * |
| gfc_get_interface_mapping_charlen (gfc_interface_mapping * mapping, |
| gfc_charlen * cl) |
| { |
| gfc_charlen *new; |
| |
| new = gfc_get_charlen (); |
| new->next = mapping->charlens; |
| new->length = gfc_copy_expr (cl->length); |
| |
| mapping->charlens = new; |
| return new; |
| } |
| |
| |
| /* A subroutine of gfc_add_interface_mapping. Return a descriptorless |
| array variable that can be used as the actual argument for dummy |
| argument SYM. Add any initialization code to BLOCK. PACKED is as |
| for gfc_get_nodesc_array_type and DATA points to the first element |
| in the passed array. */ |
| |
| static tree |
| gfc_get_interface_mapping_array (stmtblock_t * block, gfc_symbol * sym, |
| int packed, tree data) |
| { |
| tree type; |
| tree var; |
| |
| type = gfc_typenode_for_spec (&sym->ts); |
| type = gfc_get_nodesc_array_type (type, sym->as, packed); |
| |
| var = gfc_create_var (type, "ifm"); |
| gfc_add_modify_expr (block, var, fold_convert (type, data)); |
| |
| return var; |
| } |
| |
| |
| /* A subroutine of gfc_add_interface_mapping. Set the stride, upper bounds |
| and offset of descriptorless array type TYPE given that it has the same |
| size as DESC. Add any set-up code to BLOCK. */ |
| |
| static void |
| gfc_set_interface_mapping_bounds (stmtblock_t * block, tree type, tree desc) |
| { |
| int n; |
| tree dim; |
| tree offset; |
| tree tmp; |
| |
| offset = gfc_index_zero_node; |
| for (n = 0; n < GFC_TYPE_ARRAY_RANK (type); n++) |
| { |
| dim = gfc_rank_cst[n]; |
| GFC_TYPE_ARRAY_STRIDE (type, n) = gfc_conv_array_stride (desc, n); |
| if (GFC_TYPE_ARRAY_LBOUND (type, n) == NULL_TREE) |
| { |
| GFC_TYPE_ARRAY_LBOUND (type, n) |
| = gfc_conv_descriptor_lbound (desc, dim); |
| GFC_TYPE_ARRAY_UBOUND (type, n) |
| = gfc_conv_descriptor_ubound (desc, dim); |
| } |
| else if (GFC_TYPE_ARRAY_UBOUND (type, n) == NULL_TREE) |
| { |
| tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, |
| gfc_conv_descriptor_ubound (desc, dim), |
| gfc_conv_descriptor_lbound (desc, dim)); |
| tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, |
| GFC_TYPE_ARRAY_LBOUND (type, n), |
| tmp); |
| tmp = gfc_evaluate_now (tmp, block); |
| GFC_TYPE_ARRAY_UBOUND (type, n) = tmp; |
| } |
| tmp = fold_build2 (MULT_EXPR, gfc_array_index_type, |
| GFC_TYPE_ARRAY_LBOUND (type, n), |
| GFC_TYPE_ARRAY_STRIDE (type, n)); |
| offset = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp); |
| } |
| offset = gfc_evaluate_now (offset, block); |
| GFC_TYPE_ARRAY_OFFSET (type) = offset; |
| } |
| |
| |
| /* Extend MAPPING so that it maps dummy argument SYM to the value stored |
| in SE. The caller may still use se->expr and se->string_length after |
| calling this function. */ |
| |
| void |
| gfc_add_interface_mapping (gfc_interface_mapping * mapping, |
| gfc_symbol * sym, gfc_se * se) |
| { |
| gfc_interface_sym_mapping *sm; |
| tree desc; |
| tree tmp; |
| tree value; |
| gfc_symbol *new_sym; |
| gfc_symtree *root; |
| gfc_symtree *new_symtree; |
| |
| /* Create a new symbol to represent the actual argument. */ |
| new_sym = gfc_new_symbol (sym->name, NULL); |
| new_sym->ts = sym->ts; |
| new_sym->attr.referenced = 1; |
| new_sym->attr.dimension = sym->attr.dimension; |
| new_sym->attr.pointer = sym->attr.pointer; |
| new_sym->attr.allocatable = sym->attr.allocatable; |
| new_sym->attr.flavor = sym->attr.flavor; |
| |
| /* Create a fake symtree for it. */ |
| root = NULL; |
| new_symtree = gfc_new_symtree (&root, sym->name); |
| new_symtree->n.sym = new_sym; |
| gcc_assert (new_symtree == root); |
| |
| /* Create a dummy->actual mapping. */ |
| sm = gfc_getmem (sizeof (*sm)); |
| sm->next = mapping->syms; |
| sm->old = sym; |
| sm->new = new_symtree; |
| mapping->syms = sm; |
| |
| /* Stabilize the argument's value. */ |
| se->expr = gfc_evaluate_now (se->expr, &se->pre); |
| |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| /* Create a copy of the dummy argument's length. */ |
| new_sym->ts.cl = gfc_get_interface_mapping_charlen (mapping, sym->ts.cl); |
| |
| /* If the length is specified as "*", record the length that |
| the caller is passing. We should use the callee's length |
| in all other cases. */ |
| if (!new_sym->ts.cl->length) |
| { |
| se->string_length = gfc_evaluate_now (se->string_length, &se->pre); |
| new_sym->ts.cl->backend_decl = se->string_length; |
| } |
| } |
| |
| /* Use the passed value as-is if the argument is a function. */ |
| if (sym->attr.flavor == FL_PROCEDURE) |
| value = se->expr; |
| |
| /* If the argument is either a string or a pointer to a string, |
| convert it to a boundless character type. */ |
| else if (!sym->attr.dimension && sym->ts.type == BT_CHARACTER) |
| { |
| tmp = gfc_get_character_type_len (sym->ts.kind, NULL); |
| tmp = build_pointer_type (tmp); |
| if (sym->attr.pointer) |
| value = build_fold_indirect_ref (se->expr); |
| else |
| value = se->expr; |
| value = fold_convert (tmp, value); |
| } |
| |
| /* If the argument is a scalar, a pointer to an array or an allocatable, |
| dereference it. */ |
| else if (!sym->attr.dimension || sym->attr.pointer || sym->attr.allocatable) |
| value = build_fold_indirect_ref (se->expr); |
| |
| /* For character(*), use the actual argument's descriptor. */ |
| else if (sym->ts.type == BT_CHARACTER && !new_sym->ts.cl->length) |
| value = build_fold_indirect_ref (se->expr); |
| |
| /* If the argument is an array descriptor, use it to determine |
| information about the actual argument's shape. */ |
| else if (POINTER_TYPE_P (TREE_TYPE (se->expr)) |
| && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se->expr)))) |
| { |
| /* Get the actual argument's descriptor. */ |
| desc = build_fold_indirect_ref (se->expr); |
| |
| /* Create the replacement variable. */ |
| tmp = gfc_conv_descriptor_data_get (desc); |
| value = gfc_get_interface_mapping_array (&se->pre, sym, 0, tmp); |
| |
| /* Use DESC to work out the upper bounds, strides and offset. */ |
| gfc_set_interface_mapping_bounds (&se->pre, TREE_TYPE (value), desc); |
| } |
| else |
| /* Otherwise we have a packed array. */ |
| value = gfc_get_interface_mapping_array (&se->pre, sym, 2, se->expr); |
| |
| new_sym->backend_decl = value; |
| } |
| |
| |
| /* Called once all dummy argument mappings have been added to MAPPING, |
| but before the mapping is used to evaluate expressions. Pre-evaluate |
| the length of each argument, adding any initialization code to PRE and |
| any finalization code to POST. */ |
| |
| void |
| gfc_finish_interface_mapping (gfc_interface_mapping * mapping, |
| stmtblock_t * pre, stmtblock_t * post) |
| { |
| gfc_interface_sym_mapping *sym; |
| gfc_expr *expr; |
| gfc_se se; |
| |
| for (sym = mapping->syms; sym; sym = sym->next) |
| if (sym->new->n.sym->ts.type == BT_CHARACTER |
| && !sym->new->n.sym->ts.cl->backend_decl) |
| { |
| expr = sym->new->n.sym->ts.cl->length; |
| gfc_apply_interface_mapping_to_expr (mapping, expr); |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr (&se, expr); |
| |
| se.expr = gfc_evaluate_now (se.expr, &se.pre); |
| gfc_add_block_to_block (pre, &se.pre); |
| gfc_add_block_to_block (post, &se.post); |
| |
| sym->new->n.sym->ts.cl->backend_decl = se.expr; |
| } |
| } |
| |
| |
| /* Like gfc_apply_interface_mapping_to_expr, but applied to |
| constructor C. */ |
| |
| static void |
| gfc_apply_interface_mapping_to_cons (gfc_interface_mapping * mapping, |
| gfc_constructor * c) |
| { |
| for (; c; c = c->next) |
| { |
| gfc_apply_interface_mapping_to_expr (mapping, c->expr); |
| if (c->iterator) |
| { |
| gfc_apply_interface_mapping_to_expr (mapping, c->iterator->start); |
| gfc_apply_interface_mapping_to_expr (mapping, c->iterator->end); |
| gfc_apply_interface_mapping_to_expr (mapping, c->iterator->step); |
| } |
| } |
| } |
| |
| |
| /* Like gfc_apply_interface_mapping_to_expr, but applied to |
| reference REF. */ |
| |
| static void |
| gfc_apply_interface_mapping_to_ref (gfc_interface_mapping * mapping, |
| gfc_ref * ref) |
| { |
| int n; |
| |
| for (; ref; ref = ref->next) |
| switch (ref->type) |
| { |
| case REF_ARRAY: |
| for (n = 0; n < ref->u.ar.dimen; n++) |
| { |
| gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.start[n]); |
| gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.end[n]); |
| gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.stride[n]); |
| } |
| gfc_apply_interface_mapping_to_expr (mapping, ref->u.ar.offset); |
| break; |
| |
| case REF_COMPONENT: |
| break; |
| |
| case REF_SUBSTRING: |
| gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.start); |
| gfc_apply_interface_mapping_to_expr (mapping, ref->u.ss.end); |
| break; |
| } |
| } |
| |
| |
| /* EXPR is a copy of an expression that appeared in the interface |
| associated with MAPPING. Walk it recursively looking for references to |
| dummy arguments that MAPPING maps to actual arguments. Replace each such |
| reference with a reference to the associated actual argument. */ |
| |
| static void |
| gfc_apply_interface_mapping_to_expr (gfc_interface_mapping * mapping, |
| gfc_expr * expr) |
| { |
| gfc_interface_sym_mapping *sym; |
| gfc_actual_arglist *actual; |
| |
| if (!expr) |
| return; |
| |
| /* Copying an expression does not copy its length, so do that here. */ |
| if (expr->ts.type == BT_CHARACTER && expr->ts.cl) |
| { |
| expr->ts.cl = gfc_get_interface_mapping_charlen (mapping, expr->ts.cl); |
| gfc_apply_interface_mapping_to_expr (mapping, expr->ts.cl->length); |
| } |
| |
| /* Apply the mapping to any references. */ |
| gfc_apply_interface_mapping_to_ref (mapping, expr->ref); |
| |
| /* ...and to the expression's symbol, if it has one. */ |
| if (expr->symtree) |
| for (sym = mapping->syms; sym; sym = sym->next) |
| if (sym->old == expr->symtree->n.sym) |
| expr->symtree = sym->new; |
| |
| /* ...and to subexpressions in expr->value. */ |
| switch (expr->expr_type) |
| { |
| case EXPR_VARIABLE: |
| case EXPR_CONSTANT: |
| case EXPR_NULL: |
| case EXPR_SUBSTRING: |
| break; |
| |
| case EXPR_OP: |
| gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op1); |
| gfc_apply_interface_mapping_to_expr (mapping, expr->value.op.op2); |
| break; |
| |
| case EXPR_FUNCTION: |
| for (sym = mapping->syms; sym; sym = sym->next) |
| if (sym->old == expr->value.function.esym) |
| expr->value.function.esym = sym->new->n.sym; |
| |
| for (actual = expr->value.function.actual; actual; actual = actual->next) |
| gfc_apply_interface_mapping_to_expr (mapping, actual->expr); |
| break; |
| |
| case EXPR_ARRAY: |
| case EXPR_STRUCTURE: |
| gfc_apply_interface_mapping_to_cons (mapping, expr->value.constructor); |
| break; |
| } |
| } |
| |
| |
| /* Evaluate interface expression EXPR using MAPPING. Store the result |
| in SE. */ |
| |
| void |
| gfc_apply_interface_mapping (gfc_interface_mapping * mapping, |
| gfc_se * se, gfc_expr * expr) |
| { |
| expr = gfc_copy_expr (expr); |
| gfc_apply_interface_mapping_to_expr (mapping, expr); |
| gfc_conv_expr (se, expr); |
| se->expr = gfc_evaluate_now (se->expr, &se->pre); |
| gfc_free_expr (expr); |
| } |
| |
| /* Returns a reference to a temporary array into which a component of |
| an actual argument derived type array is copied and then returned |
| after the function call. |
| TODO Get rid of this kludge, when array descriptors are capable of |
| handling arrays with a bigger stride in bytes than size. */ |
| |
| void |
| gfc_conv_aliased_arg (gfc_se * parmse, gfc_expr * expr, |
| int g77, sym_intent intent) |
| { |
| gfc_se lse; |
| gfc_se rse; |
| gfc_ss *lss; |
| gfc_ss *rss; |
| gfc_loopinfo loop; |
| gfc_loopinfo loop2; |
| gfc_ss_info *info; |
| tree offset; |
| tree tmp_index; |
| tree tmp; |
| tree base_type; |
| stmtblock_t body; |
| int n; |
| |
| gcc_assert (expr->expr_type == EXPR_VARIABLE); |
| |
| gfc_init_se (&lse, NULL); |
| gfc_init_se (&rse, NULL); |
| |
| /* Walk the argument expression. */ |
| rss = gfc_walk_expr (expr); |
| |
| gcc_assert (rss != gfc_ss_terminator); |
| |
| /* Initialize the scalarizer. */ |
| gfc_init_loopinfo (&loop); |
| gfc_add_ss_to_loop (&loop, rss); |
| |
| /* Calculate the bounds of the scalarization. */ |
| gfc_conv_ss_startstride (&loop); |
| |
| /* Build an ss for the temporary. */ |
| base_type = gfc_typenode_for_spec (&expr->ts); |
| if (GFC_ARRAY_TYPE_P (base_type) |
| || GFC_DESCRIPTOR_TYPE_P (base_type)) |
| base_type = gfc_get_element_type (base_type); |
| |
| loop.temp_ss = gfc_get_ss ();; |
| loop.temp_ss->type = GFC_SS_TEMP; |
| loop.temp_ss->data.temp.type = base_type; |
| |
| if (expr->ts.type == BT_CHARACTER) |
| { |
| gfc_ref *char_ref = expr->ref; |
| |
| for (; char_ref; char_ref = char_ref->next) |
| if (char_ref->type == REF_SUBSTRING) |
| { |
| gfc_se tmp_se; |
| |
| expr->ts.cl = gfc_get_charlen (); |
| expr->ts.cl->next = char_ref->u.ss.length->next; |
| char_ref->u.ss.length->next = expr->ts.cl; |
| |
| gfc_init_se (&tmp_se, NULL); |
| gfc_conv_expr_type (&tmp_se, char_ref->u.ss.end, |
| gfc_array_index_type); |
| tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, |
| tmp_se.expr, gfc_index_one_node); |
| tmp = gfc_evaluate_now (tmp, &parmse->pre); |
| gfc_init_se (&tmp_se, NULL); |
| gfc_conv_expr_type (&tmp_se, char_ref->u.ss.start, |
| gfc_array_index_type); |
| tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, |
| tmp, tmp_se.expr); |
| expr->ts.cl->backend_decl = tmp; |
| |
| break; |
| } |
| loop.temp_ss->data.temp.type |
| = gfc_typenode_for_spec (&expr->ts); |
| loop.temp_ss->string_length = expr->ts.cl->backend_decl; |
| } |
| |
| loop.temp_ss->data.temp.dimen = loop.dimen; |
| loop.temp_ss->next = gfc_ss_terminator; |
| |
| /* Associate the SS with the loop. */ |
| gfc_add_ss_to_loop (&loop, loop.temp_ss); |
| |
| /* Setup the scalarizing loops. */ |
| gfc_conv_loop_setup (&loop); |
| |
| /* Pass the temporary descriptor back to the caller. */ |
| info = &loop.temp_ss->data.info; |
| parmse->expr = info->descriptor; |
| |
| /* Setup the gfc_se structures. */ |
| gfc_copy_loopinfo_to_se (&lse, &loop); |
| gfc_copy_loopinfo_to_se (&rse, &loop); |
| |
| rse.ss = rss; |
| lse.ss = loop.temp_ss; |
| gfc_mark_ss_chain_used (rss, 1); |
| gfc_mark_ss_chain_used (loop.temp_ss, 1); |
| |
| /* Start the scalarized loop body. */ |
| gfc_start_scalarized_body (&loop, &body); |
| |
| /* Translate the expression. */ |
| gfc_conv_expr (&rse, expr); |
| |
| gfc_conv_tmp_array_ref (&lse); |
| gfc_advance_se_ss_chain (&lse); |
| |
| if (intent != INTENT_OUT) |
| { |
| tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, true, false); |
| gfc_add_expr_to_block (&body, tmp); |
| gcc_assert (rse.ss == gfc_ss_terminator); |
| gfc_trans_scalarizing_loops (&loop, &body); |
| } |
| else |
| { |
| /* Make sure that the temporary declaration survives by merging |
| all the loop declarations into the current context. */ |
| for (n = 0; n < loop.dimen; n++) |
| { |
| gfc_merge_block_scope (&body); |
| body = loop.code[loop.order[n]]; |
| } |
| gfc_merge_block_scope (&body); |
| } |
| |
| /* Add the post block after the second loop, so that any |
| freeing of allocated memory is done at the right time. */ |
| gfc_add_block_to_block (&parmse->pre, &loop.pre); |
| |
| /**********Copy the temporary back again.*********/ |
| |
| gfc_init_se (&lse, NULL); |
| gfc_init_se (&rse, NULL); |
| |
| /* Walk the argument expression. */ |
| lss = gfc_walk_expr (expr); |
| rse.ss = loop.temp_ss; |
| lse.ss = lss; |
| |
| /* Initialize the scalarizer. */ |
| gfc_init_loopinfo (&loop2); |
| gfc_add_ss_to_loop (&loop2, lss); |
| |
| /* Calculate the bounds of the scalarization. */ |
| gfc_conv_ss_startstride (&loop2); |
| |
| /* Setup the scalarizing loops. */ |
| gfc_conv_loop_setup (&loop2); |
| |
| gfc_copy_loopinfo_to_se (&lse, &loop2); |
| gfc_copy_loopinfo_to_se (&rse, &loop2); |
| |
| gfc_mark_ss_chain_used (lss, 1); |
| gfc_mark_ss_chain_used (loop.temp_ss, 1); |
| |
| /* Declare the variable to hold the temporary offset and start the |
| scalarized loop body. */ |
| offset = gfc_create_var (gfc_array_index_type, NULL); |
| gfc_start_scalarized_body (&loop2, &body); |
| |
| /* Build the offsets for the temporary from the loop variables. The |
| temporary array has lbounds of zero and strides of one in all |
| dimensions, so this is very simple. The offset is only computed |
| outside the innermost loop, so the overall transfer could be |
| optimized further. */ |
| info = &rse.ss->data.info; |
| |
| tmp_index = gfc_index_zero_node; |
| for (n = info->dimen - 1; n > 0; n--) |
| { |
| tree tmp_str; |
| tmp = rse.loop->loopvar[n]; |
| tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, |
| tmp, rse.loop->from[n]); |
| tmp = fold_build2 (PLUS_EXPR, gfc_array_index_type, |
| tmp, tmp_index); |
| |
| tmp_str = fold_build2 (MINUS_EXPR, gfc_array_index_type, |
| rse.loop->to[n-1], rse.loop->from[n-1]); |
| tmp_str = fold_build2 (PLUS_EXPR, gfc_array_index_type, |
| tmp_str, gfc_index_one_node); |
| |
| tmp_index = fold_build2 (MULT_EXPR, gfc_array_index_type, |
| tmp, tmp_str); |
| } |
| |
| tmp_index = fold_build2 (MINUS_EXPR, gfc_array_index_type, |
| tmp_index, rse.loop->from[0]); |
| gfc_add_modify_expr (&rse.loop->code[0], offset, tmp_index); |
| |
| tmp_index = fold_build2 (PLUS_EXPR, gfc_array_index_type, |
| rse.loop->loopvar[0], offset); |
| |
| /* Now use the offset for the reference. */ |
| tmp = build_fold_indirect_ref (info->data); |
| rse.expr = gfc_build_array_ref (tmp, tmp_index); |
| |
| if (expr->ts.type == BT_CHARACTER) |
| rse.string_length = expr->ts.cl->backend_decl; |
| |
| gfc_conv_expr (&lse, expr); |
| |
| gcc_assert (lse.ss == gfc_ss_terminator); |
| |
| tmp = gfc_trans_scalar_assign (&lse, &rse, expr->ts, false, false); |
| gfc_add_expr_to_block (&body, tmp); |
| |
| /* Generate the copying loops. */ |
| gfc_trans_scalarizing_loops (&loop2, &body); |
| |
| /* Wrap the whole thing up by adding the second loop to the post-block |
| and following it by the post-block of the first loop. In this way, |
| if the temporary needs freeing, it is done after use! */ |
| if (intent != INTENT_IN) |
| { |
| gfc_add_block_to_block (&parmse->post, &loop2.pre); |
| gfc_add_block_to_block (&parmse->post, &loop2.post); |
| } |
| |
| gfc_add_block_to_block (&parmse->post, &loop.post); |
| |
| gfc_cleanup_loop (&loop); |
| gfc_cleanup_loop (&loop2); |
| |
| /* Pass the string length to the argument expression. */ |
| if (expr->ts.type == BT_CHARACTER) |
| parmse->string_length = expr->ts.cl->backend_decl; |
| |
| /* We want either the address for the data or the address of the descriptor, |
| depending on the mode of passing array arguments. */ |
| if (g77) |
| parmse->expr = gfc_conv_descriptor_data_get (parmse->expr); |
| else |
| parmse->expr = build_fold_addr_expr (parmse->expr); |
| |
| return; |
| } |
| |
| /* Is true if an array reference is followed by a component or substring |
| reference. */ |
| |
| bool |
| is_aliased_array (gfc_expr * e) |
| { |
| gfc_ref * ref; |
| bool seen_array; |
| |
| seen_array = false; |
| for (ref = e->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_ARRAY |
| && ref->u.ar.type != AR_ELEMENT) |
| seen_array = true; |
| |
| if (seen_array |
| && ref->type != REF_ARRAY) |
| return seen_array; |
| } |
| return false; |
| } |
| |
| /* Generate the code for argument list functions. */ |
| |
| static void |
| conv_arglist_function (gfc_se *se, gfc_expr *expr, const char *name) |
| { |
| tree type = NULL_TREE; |
| /* Pass by value for g77 %VAL(arg), pass the address |
| indirectly for %LOC, else by reference. Thus %REF |
| is a "do-nothing" and %LOC is the same as an F95 |
| pointer. */ |
| if (strncmp (name, "%VAL", 4) == 0) |
| { |
| gfc_conv_expr (se, expr); |
| /* %VAL converts argument to default kind. */ |
| switch (expr->ts.type) |
| { |
| case BT_REAL: |
| type = gfc_get_real_type (gfc_default_real_kind); |
| se->expr = fold_convert (type, se->expr); |
| break; |
| case BT_COMPLEX: |
| type = gfc_get_complex_type (gfc_default_complex_kind); |
| se->expr = fold_convert (type, se->expr); |
| break; |
| case BT_INTEGER: |
| type = gfc_get_int_type (gfc_default_integer_kind); |
| se->expr = fold_convert (type, se->expr); |
| break; |
| case BT_LOGICAL: |
| type = gfc_get_logical_type (gfc_default_logical_kind); |
| se->expr = fold_convert (type, se->expr); |
| break; |
| /* This should have been resolved away. */ |
| case BT_UNKNOWN: case BT_CHARACTER: case BT_DERIVED: |
| case BT_PROCEDURE: case BT_HOLLERITH: |
| gfc_internal_error ("Bad type in conv_arglist_function"); |
| } |
| |
| } |
| else if (strncmp (name, "%LOC", 4) == 0) |
| { |
| gfc_conv_expr_reference (se, expr); |
| se->expr = gfc_build_addr_expr (NULL, se->expr); |
| } |
| else if (strncmp (name, "%REF", 4) == 0) |
| gfc_conv_expr_reference (se, expr); |
| else |
| gfc_error ("Unknown argument list function at %L", &expr->where); |
| } |
| |
| |
| /* Generate code for a procedure call. Note can return se->post != NULL. |
| If se->direct_byref is set then se->expr contains the return parameter. |
| Return nonzero, if the call has alternate specifiers. */ |
| |
| int |
| gfc_conv_function_call (gfc_se * se, gfc_symbol * sym, |
| gfc_actual_arglist * arg) |
| { |
| gfc_interface_mapping mapping; |
| tree arglist; |
| tree retargs; |
| tree tmp; |
| tree fntype; |
| gfc_se parmse; |
| gfc_ss *argss; |
| gfc_ss_info *info; |
| int byref; |
| int parm_kind; |
| tree type; |
| tree var; |
| tree len; |
| tree stringargs; |
| gfc_formal_arglist *formal; |
| int has_alternate_specifier = 0; |
| bool need_interface_mapping; |
| bool callee_alloc; |
| gfc_typespec ts; |
| gfc_charlen cl; |
| gfc_expr *e; |
| gfc_symbol *fsym; |
| stmtblock_t post; |
| enum {MISSING = 0, ELEMENTAL, SCALAR, SCALAR_POINTER, ARRAY}; |
| |
| arglist = NULL_TREE; |
| retargs = NULL_TREE; |
| stringargs = NULL_TREE; |
| var = NULL_TREE; |
| len = NULL_TREE; |
| |
| if (se->ss != NULL) |
| { |
| if (!sym->attr.elemental) |
| { |
| gcc_assert (se->ss->type == GFC_SS_FUNCTION); |
| if (se->ss->useflags) |
| { |
| gcc_assert (gfc_return_by_reference (sym) |
| && sym->result->attr.dimension); |
| gcc_assert (se->loop != NULL); |
| |
| /* Access the previously obtained result. */ |
| gfc_conv_tmp_array_ref (se); |
| gfc_advance_se_ss_chain (se); |
| return 0; |
| } |
| } |
| info = &se->ss->data.info; |
| } |
| else |
| info = NULL; |
| |
| gfc_init_block (&post); |
| gfc_init_interface_mapping (&mapping); |
| need_interface_mapping = ((sym->ts.type == BT_CHARACTER |
| && sym->ts.cl->length |
| && sym->ts.cl->length->expr_type |
| != EXPR_CONSTANT) |
| || sym->attr.dimension); |
| formal = sym->formal; |
| /* Evaluate the arguments. */ |
| for (; arg != NULL; arg = arg->next, formal = formal ? formal->next : NULL) |
| { |
| e = arg->expr; |
| fsym = formal ? formal->sym : NULL; |
| parm_kind = MISSING; |
| if (e == NULL) |
| { |
| |
| if (se->ignore_optional) |
| { |
| /* Some intrinsics have already been resolved to the correct |
| parameters. */ |
| continue; |
| } |
| else if (arg->label) |
| { |
| has_alternate_specifier = 1; |
| continue; |
| } |
| else |
| { |
| /* Pass a NULL pointer for an absent arg. */ |
| gfc_init_se (&parmse, NULL); |
| parmse.expr = null_pointer_node; |
| if (arg->missing_arg_type == BT_CHARACTER) |
| parmse.string_length = build_int_cst (gfc_charlen_type_node, 0); |
| } |
| } |
| else if (se->ss && se->ss->useflags) |
| { |
| /* An elemental function inside a scalarized loop. */ |
| gfc_init_se (&parmse, se); |
| gfc_conv_expr_reference (&parmse, e); |
| parm_kind = ELEMENTAL; |
| } |
| else |
| { |
| /* A scalar or transformational function. */ |
| gfc_init_se (&parmse, NULL); |
| argss = gfc_walk_expr (e); |
| |
| if (argss == gfc_ss_terminator) |
| { |
| parm_kind = SCALAR; |
| if (arg->name && arg->name[0] == '%') |
| /* Argument list functions %VAL, %LOC and %REF are signalled |
| through arg->name. */ |
| conv_arglist_function (&parmse, arg->expr, arg->name); |
| else |
| { |
| gfc_conv_expr_reference (&parmse, e); |
| if (fsym && fsym->attr.pointer |
| && e->expr_type != EXPR_NULL) |
| { |
| /* Scalar pointer dummy args require an extra level of |
| indirection. The null pointer already contains |
| this level of indirection. */ |
| parm_kind = SCALAR_POINTER; |
| parmse.expr = build_fold_addr_expr (parmse.expr); |
| } |
| } |
| } |
| else |
| { |
| /* If the procedure requires an explicit interface, the actual |
| argument is passed according to the corresponding formal |
| argument. If the corresponding formal argument is a POINTER, |
| ALLOCATABLE or assumed shape, we do not use g77's calling |
| convention, and pass the address of the array descriptor |
| instead. Otherwise we use g77's calling convention. */ |
| int f; |
| f = (fsym != NULL) |
| && !(fsym->attr.pointer || fsym->attr.allocatable) |
| && fsym->as->type != AS_ASSUMED_SHAPE; |
| f = f || !sym->attr.always_explicit; |
| |
| if (e->expr_type == EXPR_VARIABLE |
| && is_aliased_array (e)) |
| /* The actual argument is a component reference to an |
| array of derived types. In this case, the argument |
| is converted to a temporary, which is passed and then |
| written back after the procedure call. */ |
| gfc_conv_aliased_arg (&parmse, e, f, |
| fsym ? fsym->attr.intent : INTENT_INOUT); |
| else |
| gfc_conv_array_parameter (&parmse, e, argss, f); |
| |
| /* If an ALLOCATABLE dummy argument has INTENT(OUT) and is |
| allocated on entry, it must be deallocated. */ |
| if (fsym && fsym->attr.allocatable |
| && fsym->attr.intent == INTENT_OUT) |
| { |
| tmp = build_fold_indirect_ref (parmse.expr); |
| tmp = gfc_trans_dealloc_allocated (tmp); |
| gfc_add_expr_to_block (&se->pre, tmp); |
| } |
| |
| } |
| } |
| |
| if (fsym) |
| { |
| if (e) |
| { |
| /* If an optional argument is itself an optional dummy |
| argument, check its presence and substitute a null |
| if absent. */ |
| if (e->expr_type == EXPR_VARIABLE |
| && e->symtree->n.sym->attr.optional |
| && fsym->attr.optional) |
| gfc_conv_missing_dummy (&parmse, e, fsym->ts); |
| |
| /* If an INTENT(OUT) dummy of derived type has a default |
| initializer, it must be (re)initialized here. */ |
| if (fsym->attr.intent == INTENT_OUT |
| && fsym->ts.type == BT_DERIVED |
| && fsym->value) |
| { |
| gcc_assert (!fsym->attr.allocatable); |
| tmp = gfc_trans_assignment (e, fsym->value, false); |
| gfc_add_expr_to_block (&se->pre, tmp); |
| } |
| |
| /* Obtain the character length of an assumed character |
| length procedure from the typespec. */ |
| if (fsym->ts.type == BT_CHARACTER |
| && parmse.string_length == NULL_TREE |
| && e->ts.type == BT_PROCEDURE |
| && e->symtree->n.sym->ts.type == BT_CHARACTER |
| && e->symtree->n.sym->ts.cl->length != NULL) |
| { |
| gfc_conv_const_charlen (e->symtree->n.sym->ts.cl); |
| parmse.string_length |
| = e->symtree->n.sym->ts.cl->backend_decl; |
| } |
| } |
| |
| if (need_interface_mapping) |
| gfc_add_interface_mapping (&mapping, fsym, &parmse); |
| } |
| |
| gfc_add_block_to_block (&se->pre, &parmse.pre); |
| gfc_add_block_to_block (&post, &parmse.post); |
| |
| /* Allocated allocatable components of derived types must be |
| deallocated for INTENT(OUT) dummy arguments and non-variable |
| scalars. Non-variable arrays are dealt with in trans-array.c |
| (gfc_conv_array_parameter). */ |
| if (e && e->ts.type == BT_DERIVED |
| && e->ts.derived->attr.alloc_comp |
| && ((formal && formal->sym->attr.intent == INTENT_OUT) |
| || |
| (e->expr_type != EXPR_VARIABLE && !e->rank))) |
| { |
| int parm_rank; |
| tmp = build_fold_indirect_ref (parmse.expr); |
| parm_rank = e->rank; |
| switch (parm_kind) |
| { |
| case (ELEMENTAL): |
| case (SCALAR): |
| parm_rank = 0; |
| break; |
| |
| case (SCALAR_POINTER): |
| tmp = build_fold_indirect_ref (tmp); |
| break; |
| case (ARRAY): |
| tmp = parmse.expr; |
| break; |
| } |
| |
| tmp = gfc_deallocate_alloc_comp (e->ts.derived, tmp, parm_rank); |
| if (e->expr_type == EXPR_VARIABLE && e->symtree->n.sym->attr.optional) |
| tmp = build3_v (COND_EXPR, gfc_conv_expr_present (e->symtree->n.sym), |
| tmp, build_empty_stmt ()); |
| |
| if (e->expr_type != EXPR_VARIABLE) |
| /* Don't deallocate non-variables until they have been used. */ |
| gfc_add_expr_to_block (&se->post, tmp); |
| else |
| { |
| gcc_assert (formal && formal->sym->attr.intent == INTENT_OUT); |
| gfc_add_expr_to_block (&se->pre, tmp); |
| } |
| } |
| |
| /* Character strings are passed as two parameters, a length and a |
| pointer. */ |
| if (parmse.string_length != NULL_TREE) |
| stringargs = gfc_chainon_list (stringargs, parmse.string_length); |
| |
| arglist = gfc_chainon_list (arglist, parmse.expr); |
| } |
| gfc_finish_interface_mapping (&mapping, &se->pre, &se->post); |
| |
| ts = sym->ts; |
| if (ts.type == BT_CHARACTER) |
| { |
| if (sym->ts.cl->length == NULL) |
| { |
| /* Assumed character length results are not allowed by 5.1.1.5 of the |
| standard and are trapped in resolve.c; except in the case of SPREAD |
| (and other intrinsics?) and dummy functions. In the case of SPREAD, |
| we take the character length of the first argument for the result. |
| For dummies, we have to look through the formal argument list for |
| this function and use the character length found there.*/ |
| if (!sym->attr.dummy) |
| cl.backend_decl = TREE_VALUE (stringargs); |
| else |
| { |
| formal = sym->ns->proc_name->formal; |
| for (; formal; formal = formal->next) |
| if (strcmp (formal->sym->name, sym->name) == 0) |
| cl.backend_decl = formal->sym->ts.cl->backend_decl; |
| } |
| } |
| else |
| { |
| /* Calculate the length of the returned string. */ |
| gfc_init_se (&parmse, NULL); |
| if (need_interface_mapping) |
| gfc_apply_interface_mapping (&mapping, &parmse, sym->ts.cl->length); |
| else |
| gfc_conv_expr (&parmse, sym->ts.cl->length); |
| gfc_add_block_to_block (&se->pre, &parmse.pre); |
| gfc_add_block_to_block (&se->post, &parmse.post); |
| cl.backend_decl = fold_convert (gfc_charlen_type_node, parmse.expr); |
| } |
| |
| /* Set up a charlen structure for it. */ |
| cl.next = NULL; |
| cl.length = NULL; |
| ts.cl = &cl; |
| |
| len = cl.backend_decl; |
| } |
| |
| byref = gfc_return_by_reference (sym); |
| if (byref) |
| { |
| if (se->direct_byref) |
| retargs = gfc_chainon_list (retargs, se->expr); |
| else if (sym->result->attr.dimension) |
| { |
| gcc_assert (se->loop && info); |
| |
| /* Set the type of the array. */ |
| tmp = gfc_typenode_for_spec (&ts); |
| info->dimen = se->loop->dimen; |
| |
| /* Evaluate the bounds of the result, if known. */ |
| gfc_set_loop_bounds_from_array_spec (&mapping, se, sym->result->as); |
| |
| /* Create a temporary to store the result. In case the function |
| returns a pointer, the temporary will be a shallow copy and |
| mustn't be deallocated. */ |
| callee_alloc = sym->attr.allocatable || sym->attr.pointer; |
| gfc_trans_create_temp_array (&se->pre, &se->post, se->loop, info, tmp, |
| false, !sym->attr.pointer, callee_alloc); |
| |
| /* Pass the temporary as the first argument. */ |
| tmp = info->descriptor; |
| tmp = build_fold_addr_expr (tmp); |
| retargs = gfc_chainon_list (retargs, tmp); |
| } |
| else if (ts.type == BT_CHARACTER) |
| { |
| /* Pass the string length. */ |
| type = gfc_get_character_type (ts.kind, ts.cl); |
| type = build_pointer_type (type); |
| |
| /* Return an address to a char[0:len-1]* temporary for |
| character pointers. */ |
| if (sym->attr.pointer || sym->attr.allocatable) |
| { |
| /* Build char[0:len-1] * pstr. */ |
| tmp = fold_build2 (MINUS_EXPR, gfc_charlen_type_node, len, |
| build_int_cst (gfc_charlen_type_node, 1)); |
| tmp = build_range_type (gfc_array_index_type, |
| gfc_index_zero_node, tmp); |
| tmp = build_array_type (gfc_character1_type_node, tmp); |
| var = gfc_create_var (build_pointer_type (tmp), "pstr"); |
| |
| /* Provide an address expression for the function arguments. */ |
| var = build_fold_addr_expr (var); |
| } |
| else |
| var = gfc_conv_string_tmp (se, type, len); |
| |
| retargs = gfc_chainon_list (retargs, var); |
| } |
| else |
| { |
| gcc_assert (gfc_option.flag_f2c && ts.type == BT_COMPLEX); |
| |
| type = gfc_get_complex_type (ts.kind); |
| var = build_fold_addr_expr (gfc_create_var (type, "cmplx")); |
| retargs = gfc_chainon_list (retargs, var); |
| } |
| |
| /* Add the string length to the argument list. */ |
| if (ts.type == BT_CHARACTER) |
| retargs = gfc_chainon_list (retargs, len); |
| } |
| gfc_free_interface_mapping (&mapping); |
| |
| /* Add the return arguments. */ |
| arglist = chainon (retargs, arglist); |
| |
| /* Add the hidden string length parameters to the arguments. */ |
| arglist = chainon (arglist, stringargs); |
| |
| /* Generate the actual call. */ |
| gfc_conv_function_val (se, sym); |
| |
| /* If there are alternate return labels, function type should be |
| integer. Can't modify the type in place though, since it can be shared |
| with other functions. For dummy arguments, the typing is done to |
| to this result, even if it has to be repeated for each call. */ |
| if (has_alternate_specifier |
| && TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) != integer_type_node) |
| { |
| if (!sym->attr.dummy) |
| { |
| TREE_TYPE (sym->backend_decl) |
| = build_function_type (integer_type_node, |
| TYPE_ARG_TYPES (TREE_TYPE (sym->backend_decl))); |
| se->expr = build_fold_addr_expr (sym->backend_decl); |
| } |
| else |
| TREE_TYPE (TREE_TYPE (TREE_TYPE (se->expr))) = integer_type_node; |
| } |
| |
| fntype = TREE_TYPE (TREE_TYPE (se->expr)); |
| se->expr = build3 (CALL_EXPR, TREE_TYPE (fntype), se->expr, |
| arglist, NULL_TREE); |
| |
| /* If we have a pointer function, but we don't want a pointer, e.g. |
| something like |
| x = f() |
| where f is pointer valued, we have to dereference the result. */ |
| if (!se->want_pointer && !byref && sym->attr.pointer) |
| se->expr = build_fold_indirect_ref (se->expr); |
| |
| /* f2c calling conventions require a scalar default real function to |
| return a double precision result. Convert this back to default |
| real. We only care about the cases that can happen in Fortran 77. |
| */ |
| if (gfc_option.flag_f2c && sym->ts.type == BT_REAL |
| && sym->ts.kind == gfc_default_real_kind |
| && !sym->attr.always_explicit) |
| se->expr = fold_convert (gfc_get_real_type (sym->ts.kind), se->expr); |
| |
| /* A pure function may still have side-effects - it may modify its |
| parameters. */ |
| TREE_SIDE_EFFECTS (se->expr) = 1; |
| #if 0 |
| if (!sym->attr.pure) |
| TREE_SIDE_EFFECTS (se->expr) = 1; |
| #endif |
| |
| if (byref) |
| { |
| /* Add the function call to the pre chain. There is no expression. */ |
| gfc_add_expr_to_block (&se->pre, se->expr); |
| se->expr = NULL_TREE; |
| |
| if (!se->direct_byref) |
| { |
| if (sym->attr.dimension) |
| { |
| if (flag_bounds_check) |
| { |
| /* Check the data pointer hasn't been modified. This would |
| happen in a function returning a pointer. */ |
| tmp = gfc_conv_descriptor_data_get (info->descriptor); |
| tmp = fold_build2 (NE_EXPR, boolean_type_node, |
| tmp, info->data); |
| gfc_trans_runtime_check (tmp, gfc_msg_fault, &se->pre, NULL); |
| } |
| se->expr = info->descriptor; |
| /* Bundle in the string length. */ |
| se->string_length = len; |
| } |
| else if (sym->ts.type == BT_CHARACTER) |
| { |
| /* Dereference for character pointer results. */ |
| if (sym->attr.pointer || sym->attr.allocatable) |
| se->expr = build_fold_indirect_ref (var); |
| else |
| se->expr = var; |
| |
| se->string_length = len; |
| } |
| else |
| { |
| gcc_assert (sym->ts.type == BT_COMPLEX && gfc_option.flag_f2c); |
| se->expr = build_fold_indirect_ref (var); |
| } |
| } |
| } |
| |
| /* Follow the function call with the argument post block. */ |
| if (byref) |
| gfc_add_block_to_block (&se->pre, &post); |
| else |
| gfc_add_block_to_block (&se->post, &post); |
| |
| return has_alternate_specifier; |
| } |
| |
| |
| /* Generate code to copy a string. */ |
| |
| static void |
| gfc_trans_string_copy (stmtblock_t * block, tree dlength, tree dest, |
| tree slength, tree src) |
| { |
| tree tmp, dlen, slen; |
| tree dsc; |
| tree ssc; |
| tree cond; |
| tree cond2; |
| tree tmp2; |
| tree tmp3; |
| tree tmp4; |
| stmtblock_t tempblock; |
| |
| dlen = fold_convert (size_type_node, gfc_evaluate_now (dlength, block)); |
| slen = fold_convert (size_type_node, gfc_evaluate_now (slength, block)); |
| |
| /* Deal with single character specially. */ |
| dsc = gfc_to_single_character (dlen, dest); |
| ssc = gfc_to_single_character (slen, src); |
| if (dsc != NULL_TREE && ssc != NULL_TREE) |
| { |
| gfc_add_modify_expr (block, dsc, ssc); |
| return; |
| } |
| |
| /* Do nothing if the destination length is zero. */ |
| cond = fold_build2 (GT_EXPR, boolean_type_node, dlen, |
| build_int_cst (gfc_charlen_type_node, 0)); |
| |
| /* The following code was previously in _gfortran_copy_string: |
| |
| // The two strings may overlap so we use memmove. |
| void |
| copy_string (GFC_INTEGER_4 destlen, char * dest, |
| GFC_INTEGER_4 srclen, const char * src) |
| { |
| if (srclen >= destlen) |
| { |
| // This will truncate if too long. |
| memmove (dest, src, destlen); |
| } |
| else |
| { |
| memmove (dest, src, srclen); |
| // Pad with spaces. |
| memset (&dest[srclen], ' ', destlen - srclen); |
| } |
| } |
| |
| We're now doing it here for better optimization, but the logic |
| is the same. */ |
| |
| /* Truncate string if source is too long. */ |
| cond2 = fold_build2 (GE_EXPR, boolean_type_node, slen, dlen); |
| tmp2 = gfc_chainon_list (NULL_TREE, dest); |
| tmp2 = gfc_chainon_list (tmp2, src); |
| tmp2 = gfc_chainon_list (tmp2, dlen); |
| tmp2 = build_function_call_expr (built_in_decls[BUILT_IN_MEMMOVE], tmp2); |
| |
| /* Else copy and pad with spaces. */ |
| tmp3 = gfc_chainon_list (NULL_TREE, dest); |
| tmp3 = gfc_chainon_list (tmp3, src); |
| tmp3 = gfc_chainon_list (tmp3, slen); |
| tmp3 = build_function_call_expr (built_in_decls[BUILT_IN_MEMMOVE], tmp3); |
| |
| tmp4 = fold_build2 (PLUS_EXPR, pchar_type_node, dest, |
| fold_convert (pchar_type_node, slen)); |
| tmp4 = gfc_chainon_list (NULL_TREE, tmp4); |
| tmp4 = gfc_chainon_list (tmp4, build_int_cst |
| (gfc_get_int_type (gfc_c_int_kind), |
| lang_hooks.to_target_charset (' '))); |
| tmp4 = gfc_chainon_list (tmp4, fold_build2 (MINUS_EXPR, TREE_TYPE(dlen), |
| dlen, slen)); |
| tmp4 = build_function_call_expr (built_in_decls[BUILT_IN_MEMSET], tmp4); |
| |
| gfc_init_block (&tempblock); |
| gfc_add_expr_to_block (&tempblock, tmp3); |
| gfc_add_expr_to_block (&tempblock, tmp4); |
| tmp3 = gfc_finish_block (&tempblock); |
| |
| /* The whole copy_string function is there. */ |
| tmp = fold_build3 (COND_EXPR, void_type_node, cond2, tmp2, tmp3); |
| tmp = fold_build3 (COND_EXPR, void_type_node, cond, tmp, build_empty_stmt ()); |
| gfc_add_expr_to_block (block, tmp); |
| } |
| |
| |
| /* Translate a statement function. |
| The value of a statement function reference is obtained by evaluating the |
| expression using the values of the actual arguments for the values of the |
| corresponding dummy arguments. */ |
| |
| static void |
| gfc_conv_statement_function (gfc_se * se, gfc_expr * expr) |
| { |
| gfc_symbol *sym; |
| gfc_symbol *fsym; |
| gfc_formal_arglist *fargs; |
| gfc_actual_arglist *args; |
| gfc_se lse; |
| gfc_se rse; |
| gfc_saved_var *saved_vars; |
| tree *temp_vars; |
| tree type; |
| tree tmp; |
| int n; |
| |
| sym = expr->symtree->n.sym; |
| args = expr->value.function.actual; |
| gfc_init_se (&lse, NULL); |
| gfc_init_se (&rse, NULL); |
| |
| n = 0; |
| for (fargs = sym->formal; fargs; fargs = fargs->next) |
| n++; |
| saved_vars = (gfc_saved_var *)gfc_getmem (n * sizeof (gfc_saved_var)); |
| temp_vars = (tree *)gfc_getmem (n * sizeof (tree)); |
| |
| for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) |
| { |
| /* Each dummy shall be specified, explicitly or implicitly, to be |
| scalar. */ |
| gcc_assert (fargs->sym->attr.dimension == 0); |
| fsym = fargs->sym; |
| |
| /* Create a temporary to hold the value. */ |
| type = gfc_typenode_for_spec (&fsym->ts); |
| temp_vars[n] = gfc_create_var (type, fsym->name); |
| |
| if (fsym->ts.type == BT_CHARACTER) |
| { |
| /* Copy string arguments. */ |
| tree arglen; |
| |
| gcc_assert (fsym->ts.cl && fsym->ts.cl->length |
| && fsym->ts.cl->length->expr_type == EXPR_CONSTANT); |
| |
| arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type)); |
| tmp = gfc_build_addr_expr (build_pointer_type (type), |
| temp_vars[n]); |
| |
| gfc_conv_expr (&rse, args->expr); |
| gfc_conv_string_parameter (&rse); |
| gfc_add_block_to_block (&se->pre, &lse.pre); |
| gfc_add_block_to_block (&se->pre, &rse.pre); |
| |
| gfc_trans_string_copy (&se->pre, arglen, tmp, rse.string_length, |
| rse.expr); |
| gfc_add_block_to_block (&se->pre, &lse.post); |
| gfc_add_block_to_block (&se->pre, &rse.post); |
| } |
| else |
| { |
| /* For everything else, just evaluate the expression. */ |
| gfc_conv_expr (&lse, args->expr); |
| |
| gfc_add_block_to_block (&se->pre, &lse.pre); |
| gfc_add_modify_expr (&se->pre, temp_vars[n], lse.expr); |
| gfc_add_block_to_block (&se->pre, &lse.post); |
| } |
| |
| args = args->next; |
| } |
| |
| /* Use the temporary variables in place of the real ones. */ |
| for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) |
| gfc_shadow_sym (fargs->sym, temp_vars[n], &saved_vars[n]); |
| |
| gfc_conv_expr (se, sym->value); |
| |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| gfc_conv_const_charlen (sym->ts.cl); |
| |
| /* Force the expression to the correct length. */ |
| if (!INTEGER_CST_P (se->string_length) |
| || tree_int_cst_lt (se->string_length, |
| sym->ts.cl->backend_decl)) |
| { |
| type = gfc_get_character_type (sym->ts.kind, sym->ts.cl); |
| tmp = gfc_create_var (type, sym->name); |
| tmp = gfc_build_addr_expr (build_pointer_type (type), tmp); |
| gfc_trans_string_copy (&se->pre, sym->ts.cl->backend_decl, tmp, |
| se->string_length, se->expr); |
| se->expr = tmp; |
| } |
| se->string_length = sym->ts.cl->backend_decl; |
| } |
| |
| /* Restore the original variables. */ |
| for (fargs = sym->formal, n = 0; fargs; fargs = fargs->next, n++) |
| gfc_restore_sym (fargs->sym, &saved_vars[n]); |
| gfc_free (saved_vars); |
| } |
| |
| |
| /* Translate a function expression. */ |
| |
| static void |
| gfc_conv_function_expr (gfc_se * se, gfc_expr * expr) |
| { |
| gfc_symbol *sym; |
| |
| if (expr->value.function.isym) |
| { |
| gfc_conv_intrinsic_function (se, expr); |
| return; |
| } |
| |
| /* We distinguish statement functions from general functions to improve |
| runtime performance. */ |
| if (expr->symtree->n.sym->attr.proc == PROC_ST_FUNCTION) |
| { |
| gfc_conv_statement_function (se, expr); |
| return; |
| } |
| |
| /* expr.value.function.esym is the resolved (specific) function symbol for |
| most functions. However this isn't set for dummy procedures. */ |
| sym = expr->value.function.esym; |
| if (!sym) |
| sym = expr->symtree->n.sym; |
| gfc_conv_function_call (se, sym, expr->value.function.actual); |
| } |
| |
| |
| static void |
| gfc_conv_array_constructor_expr (gfc_se * se, gfc_expr * expr) |
| { |
| gcc_assert (se->ss != NULL && se->ss != gfc_ss_terminator); |
| gcc_assert (se->ss->expr == expr && se->ss->type == GFC_SS_CONSTRUCTOR); |
| |
| gfc_conv_tmp_array_ref (se); |
| gfc_advance_se_ss_chain (se); |
| } |
| |
| |
| /* Build a static initializer. EXPR is the expression for the initial value. |
| The other parameters describe the variable of the component being |
| initialized. EXPR may be null. */ |
| |
| tree |
| gfc_conv_initializer (gfc_expr * expr, gfc_typespec * ts, tree type, |
| bool array, bool pointer) |
| { |
| gfc_se se; |
| |
| if (!(expr || pointer)) |
| return NULL_TREE; |
| |
| if (array) |
| { |
| /* Arrays need special handling. */ |
| if (pointer) |
| return gfc_build_null_descriptor (type); |
| else |
| return gfc_conv_array_initializer (type, expr); |
| } |
| else if (pointer) |
| return fold_convert (type, null_pointer_node); |
| else |
| { |
| switch (ts->type) |
| { |
| case BT_DERIVED: |
| gfc_init_se (&se, NULL); |
| gfc_conv_structure (&se, expr, 1); |
| return se.expr; |
| |
| case BT_CHARACTER: |
| return gfc_conv_string_init (ts->cl->backend_decl,expr); |
| |
| default: |
| gfc_init_se (&se, NULL); |
| gfc_conv_constant (&se, expr); |
| return se.expr; |
| } |
| } |
| } |
| |
| static tree |
| gfc_trans_subarray_assign (tree dest, gfc_component * cm, gfc_expr * expr) |
| { |
| gfc_se rse; |
| gfc_se lse; |
| gfc_ss *rss; |
| gfc_ss *lss; |
| stmtblock_t body; |
| stmtblock_t block; |
| gfc_loopinfo loop; |
| int n; |
| tree tmp; |
| |
| gfc_start_block (&block); |
| |
| /* Initialize the scalarizer. */ |
| gfc_init_loopinfo (&loop); |
| |
| gfc_init_se (&lse, NULL); |
| gfc_init_se (&rse, NULL); |
| |
| /* Walk the rhs. */ |
| rss = gfc_walk_expr (expr); |
| if (rss == gfc_ss_terminator) |
| { |
| /* The rhs is scalar. Add a ss for the expression. */ |
| rss = gfc_get_ss (); |
| rss->next = gfc_ss_terminator; |
| rss->type = GFC_SS_SCALAR; |
| rss->expr = expr; |
| } |
| |
| /* Create a SS for the destination. */ |
| lss = gfc_get_ss (); |
| lss->type = GFC_SS_COMPONENT; |
| lss->expr = NULL; |
| lss->shape = gfc_get_shape (cm->as->rank); |
| lss->next = gfc_ss_terminator; |
| lss->data.info.dimen = cm->as->rank; |
| lss->data.info.descriptor = dest; |
| lss->data.info.data = gfc_conv_array_data (dest); |
| lss->data.info.offset = gfc_conv_array_offset (dest); |
| for (n = 0; n < cm->as->rank; n++) |
| { |
| lss->data.info.dim[n] = n; |
| lss->data.info.start[n] = gfc_conv_array_lbound (dest, n); |
| lss->data.info.stride[n] = gfc_index_one_node; |
| |
| mpz_init (lss->shape[n]); |
| mpz_sub (lss->shape[n], cm->as->upper[n]->value.integer, |
| cm->as->lower[n]->value.integer); |
| mpz_add_ui (lss->shape[n], lss->shape[n], 1); |
| } |
| |
| /* Associate the SS with the loop. */ |
| gfc_add_ss_to_loop (&loop, lss); |
| gfc_add_ss_to_loop (&loop, rss); |
| |
| /* Calculate the bounds of the scalarization. */ |
| gfc_conv_ss_startstride (&loop); |
| |
| /* Setup the scalarizing loops. */ |
| gfc_conv_loop_setup (&loop); |
| |
| /* Setup the gfc_se structures. */ |
| gfc_copy_loopinfo_to_se (&lse, &loop); |
| gfc_copy_loopinfo_to_se (&rse, &loop); |
| |
| rse.ss = rss; |
| gfc_mark_ss_chain_used (rss, 1); |
| lse.ss = lss; |
| gfc_mark_ss_chain_used (lss, 1); |
| |
| /* Start the scalarized loop body. */ |
| gfc_start_scalarized_body (&loop, &body); |
| |
| gfc_conv_tmp_array_ref (&lse); |
| if (cm->ts.type == BT_CHARACTER) |
| lse.string_length = cm->ts.cl->backend_decl; |
| |
| gfc_conv_expr (&rse, expr); |
| |
| tmp = gfc_trans_scalar_assign (&lse, &rse, cm->ts, true, false); |
| gfc_add_expr_to_block (&body, tmp); |
| |
| gcc_assert (rse.ss == gfc_ss_terminator); |
| |
| /* Generate the copying loops. */ |
| gfc_trans_scalarizing_loops (&loop, &body); |
| |
| /* Wrap the whole thing up. */ |
| gfc_add_block_to_block (&block, &loop.pre); |
| gfc_add_block_to_block (&block, &loop.post); |
| |
| for (n = 0; n < cm->as->rank; n++) |
| mpz_clear (lss->shape[n]); |
| gfc_free (lss->shape); |
| |
| gfc_cleanup_loop (&loop); |
| |
| return gfc_finish_block (&block); |
| } |
| |
| |
| /* Assign a single component of a derived type constructor. */ |
| |
| static tree |
| gfc_trans_subcomponent_assign (tree dest, gfc_component * cm, gfc_expr * expr) |
| { |
| gfc_se se; |
| gfc_se lse; |
| gfc_ss *rss; |
| stmtblock_t block; |
| tree tmp; |
| tree offset; |
| int n; |
| |
| gfc_start_block (&block); |
| |
| if (cm->pointer) |
| { |
| gfc_init_se (&se, NULL); |
| /* Pointer component. */ |
| if (cm->dimension) |
| { |
| /* Array pointer. */ |
| if (expr->expr_type == EXPR_NULL) |
| gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
| else |
| { |
| rss = gfc_walk_expr (expr); |
| se.direct_byref = 1; |
| se.expr = dest; |
| gfc_conv_expr_descriptor (&se, expr, rss); |
| gfc_add_block_to_block (&block, &se.pre); |
| gfc_add_block_to_block (&block, &se.post); |
| } |
| } |
| else |
| { |
| /* Scalar pointers. */ |
| se.want_pointer = 1; |
| gfc_conv_expr (&se, expr); |
| gfc_add_block_to_block (&block, &se.pre); |
| gfc_add_modify_expr (&block, dest, |
| fold_convert (TREE_TYPE (dest), se.expr)); |
| gfc_add_block_to_block (&block, &se.post); |
| } |
| } |
| else if (cm->dimension) |
| { |
| if (cm->allocatable && expr->expr_type == EXPR_NULL) |
| gfc_conv_descriptor_data_set (&block, dest, null_pointer_node); |
| else if (cm->allocatable) |
| { |
| tree tmp2; |
| |
| gfc_init_se (&se, NULL); |
| |
| rss = gfc_walk_expr (expr); |
| se.want_pointer = 0; |
| gfc_conv_expr_descriptor (&se, expr, rss); |
| gfc_add_block_to_block (&block, &se.pre); |
| |
| tmp = fold_convert (TREE_TYPE (dest), se.expr); |
| gfc_add_modify_expr (&block, dest, tmp); |
| |
| if (cm->ts.type == BT_DERIVED && cm->ts.derived->attr.alloc_comp) |
| tmp = gfc_copy_alloc_comp (cm->ts.derived, se.expr, dest, |
| cm->as->rank); |
| else |
| tmp = gfc_duplicate_allocatable (dest, se.expr, |
| TREE_TYPE(cm->backend_decl), |
| cm->as->rank); |
| |
| gfc_add_expr_to_block (&block, tmp); |
| |
| gfc_add_block_to_block (&block, &se.post); |
| gfc_conv_descriptor_data_set (&block, se.expr, null_pointer_node); |
| |
| /* Shift the lbound and ubound of temporaries to being unity, rather |
| than zero, based. Calculate the offset for all cases. */ |
| offset = gfc_conv_descriptor_offset (dest); |
| gfc_add_modify_expr (&block, offset, gfc_index_zero_node); |
| tmp2 =gfc_create_var (gfc_array_index_type, NULL); |
| for (n = 0; n < expr->rank; n++) |
| { |
| if (expr->expr_type != EXPR_VARIABLE |
| && expr->expr_type != EXPR_CONSTANT) |
| { |
| tmp = gfc_conv_descriptor_ubound (dest, gfc_rank_cst[n]); |
| gfc_add_modify_expr (&block, tmp, |
| fold_build2 (PLUS_EXPR, |
| gfc_array_index_type, |
| tmp, gfc_index_one_node)); |
| tmp = gfc_conv_descriptor_lbound (dest, gfc_rank_cst[n]); |
| gfc_add_modify_expr (&block, tmp, gfc_index_one_node); |
| } |
| tmp = fold_build2 (MULT_EXPR, gfc_array_index_type, |
| gfc_conv_descriptor_lbound (dest, |
| gfc_rank_cst[n]), |
| gfc_conv_descriptor_stride (dest, |
| gfc_rank_cst[n])); |
| gfc_add_modify_expr (&block, tmp2, tmp); |
| tmp = fold_build2 (MINUS_EXPR, gfc_array_index_type, offset, tmp2); |
| gfc_add_modify_expr (&block, offset, tmp); |
| } |
| } |
| else |
| { |
| tmp = gfc_trans_subarray_assign (dest, cm, expr); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| } |
| else if (expr->ts.type == BT_DERIVED) |
| { |
| if (expr->expr_type != EXPR_STRUCTURE) |
| { |
| gfc_init_se (&se, NULL); |
| gfc_conv_expr (&se, expr); |
| gfc_add_modify_expr (&block, dest, |
| fold_convert (TREE_TYPE (dest), se.expr)); |
| } |
| else |
| { |
| /* Nested constructors. */ |
| tmp = gfc_trans_structure_assign (dest, expr); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| } |
| else |
| { |
| /* Scalar component. */ |
| gfc_init_se (&se, NULL); |
| gfc_init_se (&lse, NULL); |
| |
| gfc_conv_expr (&se, expr); |
| if (cm->ts.type == BT_CHARACTER) |
| lse.string_length = cm->ts.cl->backend_decl; |
| lse.expr = dest; |
| tmp = gfc_trans_scalar_assign (&lse, &se, cm->ts, true, false); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| return gfc_finish_block (&block); |
| } |
| |
| /* Assign a derived type constructor to a variable. */ |
| |
| static tree |
| gfc_trans_structure_assign (tree dest, gfc_expr * expr) |
| { |
| gfc_constructor *c; |
| gfc_component *cm; |
| stmtblock_t block; |
| tree field; |
| tree tmp; |
| |
| gfc_start_block (&block); |
| cm = expr->ts.derived->components; |
| for (c = expr->value.constructor; c; c = c->next, cm = cm->next) |
| { |
| /* Skip absent members in default initializers. */ |
| if (!c->expr) |
| continue; |
| |
| field = cm->backend_decl; |
| tmp = build3 (COMPONENT_REF, TREE_TYPE (field), dest, field, NULL_TREE); |
| tmp = gfc_trans_subcomponent_assign (tmp, cm, c->expr); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| return gfc_finish_block (&block); |
| } |
| |
| /* Build an expression for a constructor. If init is nonzero then |
| this is part of a static variable initializer. */ |
| |
| void |
| gfc_conv_structure (gfc_se * se, gfc_expr * expr, int init) |
| { |
| gfc_constructor *c; |
| gfc_component *cm; |
| tree val; |
| tree type; |
| tree tmp; |
| VEC(constructor_elt,gc) *v = NULL; |
| |
| gcc_assert (se->ss == NULL); |
| gcc_assert (expr->expr_type == EXPR_STRUCTURE); |
| type = gfc_typenode_for_spec (&expr->ts); |
| |
| if (!init) |
| { |
| /* Create a temporary variable and fill it in. */ |
| se->expr = gfc_create_var (type, expr->ts.derived->name); |
| tmp = gfc_trans_structure_assign (se->expr, expr); |
| gfc_add_expr_to_block (&se->pre, tmp); |
| return; |
| } |
| |
| cm = expr->ts.derived->components; |
| |
| for (c = expr->value.constructor; c; c = c->next, cm = cm->next) |
| { |
| /* Skip absent members in default initializers and allocatable |
| components. Although the latter have a default initializer |
| of EXPR_NULL,... by default, the static nullify is not needed |
| since this is done every time we come into scope. */ |
| if (!c->expr || cm->allocatable) |
| continue; |
| |
| val = gfc_conv_initializer (c->expr, &cm->ts, |
| TREE_TYPE (cm->backend_decl), cm->dimension, cm->pointer); |
| |
| /* Append it to the constructor list. */ |
| CONSTRUCTOR_APPEND_ELT (v, cm->backend_decl, val); |
| } |
| se->expr = build_constructor (type, v); |
| } |
| |
| |
| /* Translate a substring expression. */ |
| |
| static void |
| gfc_conv_substring_expr (gfc_se * se, gfc_expr * expr) |
| { |
| gfc_ref *ref; |
| |
| ref = expr->ref; |
| |
| gcc_assert (ref->type == REF_SUBSTRING); |
| |
| se->expr = gfc_build_string_const(expr->value.character.length, |
| expr->value.character.string); |
| se->string_length = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (se->expr))); |
| TYPE_STRING_FLAG (TREE_TYPE (se->expr))=1; |
| |
| gfc_conv_substring(se,ref,expr->ts.kind); |
| } |
| |
| |
| /* Entry point for expression translation. Evaluates a scalar quantity. |
| EXPR is the expression to be translated, and SE is the state structure if |
| called from within the scalarized. */ |
| |
| void |
| gfc_conv_expr (gfc_se * se, gfc_expr * expr) |
| { |
| if (se->ss && se->ss->expr == expr |
| && (se->ss->type == GFC_SS_SCALAR || se->ss->type == GFC_SS_REFERENCE)) |
| { |
| /* Substitute a scalar expression evaluated outside the scalarization |
| loop. */ |
| se->expr = se->ss->data.scalar.expr; |
| se->string_length = se->ss->string_length; |
| gfc_advance_se_ss_chain (se); |
| return; |
| } |
| |
| switch (expr->expr_type) |
| { |
| case EXPR_OP: |
| gfc_conv_expr_op (se, expr); |
| break; |
| |
| case EXPR_FUNCTION: |
| gfc_conv_function_expr (se, expr); |
| break; |
| |
| case EXPR_CONSTANT: |
| gfc_conv_constant (se, expr); |
| break; |
| |
| case EXPR_VARIABLE: |
| gfc_conv_variable (se, expr); |
| break; |
| |
| case EXPR_NULL: |
| se->expr = null_pointer_node; |
| break; |
| |
| case EXPR_SUBSTRING: |
| gfc_conv_substring_expr (se, expr); |
| break; |
| |
| case EXPR_STRUCTURE: |
| gfc_conv_structure (se, expr, 0); |
| break; |
| |
| case EXPR_ARRAY: |
| gfc_conv_array_constructor_expr (se, expr); |
| break; |
| |
| default: |
| gcc_unreachable (); |
| break; |
| } |
| } |
| |
| /* Like gfc_conv_expr_val, but the value is also suitable for use in the lhs |
| of an assignment. */ |
| void |
| gfc_conv_expr_lhs (gfc_se * se, gfc_expr * expr) |
| { |
| gfc_conv_expr (se, expr); |
| /* All numeric lvalues should have empty post chains. If not we need to |
| figure out a way of rewriting an lvalue so that it has no post chain. */ |
| gcc_assert (expr->ts.type == BT_CHARACTER || !se->post.head); |
| } |
| |
| /* Like gfc_conv_expr, but the POST block is guaranteed to be empty for |
| numeric expressions. Used for scalar values where inserting cleanup code |
| is inconvenient. */ |
| void |
| gfc_conv_expr_val (gfc_se * se, gfc_expr * expr) |
| { |
| tree val; |
| |
| gcc_assert (expr->ts.type != BT_CHARACTER); |
| gfc_conv_expr (se, expr); |
| if (se->post.head) |
| { |
| val = gfc_create_var (TREE_TYPE (se->expr), NULL); |
| gfc_add_modify_expr (&se->pre, val, se->expr); |
| se->expr = val; |
| gfc_add_block_to_block (&se->pre, &se->post); |
| } |
| } |
| |
| /* Helper to translate and expression and convert it to a particular type. */ |
| void |
| gfc_conv_expr_type (gfc_se * se, gfc_expr * expr, tree type) |
| { |
| gfc_conv_expr_val (se, expr); |
| se->expr = convert (type, se->expr); |
| } |
| |
| |
| /* Converts an expression so that it can be passed by reference. Scalar |
| values only. */ |
| |
| void |
| gfc_conv_expr_reference (gfc_se * se, gfc_expr * expr) |
| { |
| tree var; |
| |
| if (se->ss && se->ss->expr == expr |
| && se->ss->type == GFC_SS_REFERENCE) |
| { |
| se->expr = se->ss->data.scalar.expr; |
| se->string_length = se->ss->string_length; |
| gfc_advance_se_ss_chain (se); |
| return; |
| } |
| |
| if (expr->ts.type == BT_CHARACTER) |
| { |
| gfc_conv_expr (se, expr); |
| gfc_conv_string_parameter (se); |
| return; |
| } |
| |
| if (expr->expr_type == EXPR_VARIABLE) |
| { |
| se->want_pointer = 1; |
| gfc_conv_expr (se, expr); |
| if (se->post.head) |
| { |
| var = gfc_create_var (TREE_TYPE (se->expr), NULL); |
| gfc_add_modify_expr (&se->pre, var, se->expr); |
| gfc_add_block_to_block (&se->pre, &se->post); |
| se->expr = var; |
| } |
| return; |
| } |
| |
| gfc_conv_expr (se, expr); |
| |
| /* Create a temporary var to hold the value. */ |
| if (TREE_CONSTANT (se->expr)) |
| { |
| tree tmp = se->expr; |
| STRIP_TYPE_NOPS (tmp); |
| var = build_decl (CONST_DECL, NULL, TREE_TYPE (tmp)); |
| DECL_INITIAL (var) = tmp; |
| TREE_STATIC (var) = 1; |
| pushdecl (var); |
| } |
| else |
| { |
| var = gfc_create_var (TREE_TYPE (se->expr), NULL); |
| gfc_add_modify_expr (&se->pre, var, se->expr); |
| } |
| gfc_add_block_to_block (&se->pre, &se->post); |
| |
| /* Take the address of that value. */ |
| se->expr = build_fold_addr_expr (var); |
| } |
| |
| |
| tree |
| gfc_trans_pointer_assign (gfc_code * code) |
| { |
| return gfc_trans_pointer_assignment (code->expr, code->expr2); |
| } |
| |
| |
| /* Generate code for a pointer assignment. */ |
| |
| tree |
| gfc_trans_pointer_assignment (gfc_expr * expr1, gfc_expr * expr2) |
| { |
| gfc_se lse; |
| gfc_se rse; |
| gfc_ss *lss; |
| gfc_ss *rss; |
| stmtblock_t block; |
| tree desc; |
| tree tmp; |
| |
| gfc_start_block (&block); |
| |
| gfc_init_se (&lse, NULL); |
| |
| lss = gfc_walk_expr (expr1); |
| rss = gfc_walk_expr (expr2); |
| if (lss == gfc_ss_terminator) |
| { |
| /* Scalar pointers. */ |
| lse.want_pointer = 1; |
| gfc_conv_expr (&lse, expr1); |
| gcc_assert (rss == gfc_ss_terminator); |
| gfc_init_se (&rse, NULL); |
| rse.want_pointer = 1; |
| gfc_conv_expr (&rse, expr2); |
| gfc_add_block_to_block (&block, &lse.pre); |
| gfc_add_block_to_block (&block, &rse.pre); |
| gfc_add_modify_expr (&block, lse.expr, |
| fold_convert (TREE_TYPE (lse.expr), rse.expr)); |
| gfc_add_block_to_block (&block, &rse.post); |
| gfc_add_block_to_block (&block, &lse.post); |
| } |
| else |
| { |
| /* Array pointer. */ |
| gfc_conv_expr_descriptor (&lse, expr1, lss); |
| switch (expr2->expr_type) |
| { |
| case EXPR_NULL: |
| /* Just set the data pointer to null. */ |
| gfc_conv_descriptor_data_set (&lse.pre, lse.expr, null_pointer_node); |
| break; |
| |
| case EXPR_VARIABLE: |
| /* Assign directly to the pointer's descriptor. */ |
| lse.direct_byref = 1; |
| gfc_conv_expr_descriptor (&lse, expr2, rss); |
| break; |
| |
| default: |
| /* Assign to a temporary descriptor and then copy that |
| temporary to the pointer. */ |
| desc = lse.expr; |
| tmp = gfc_create_var (TREE_TYPE (desc), "ptrtemp"); |
| |
| lse.expr = tmp; |
| lse.direct_byref = 1; |
| gfc_conv_expr_descriptor (&lse, expr2, rss); |
| gfc_add_modify_expr (&lse.pre, desc, tmp); |
| break; |
| } |
| gfc_add_block_to_block (&block, &lse.pre); |
| gfc_add_block_to_block (&block, &lse.post); |
| } |
| return gfc_finish_block (&block); |
| } |
| |
| |
| /* Makes sure se is suitable for passing as a function string parameter. */ |
| /* TODO: Need to check all callers fo this function. It may be abused. */ |
| |
| void |
| gfc_conv_string_parameter (gfc_se * se) |
| { |
| tree type; |
| |
| if (TREE_CODE (se->expr) == STRING_CST) |
| { |
| se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); |
| return; |
| } |
| |
| type = TREE_TYPE (se->expr); |
| if (TYPE_STRING_FLAG (type)) |
| { |
| gcc_assert (TREE_CODE (se->expr) != INDIRECT_REF); |
| se->expr = gfc_build_addr_expr (pchar_type_node, se->expr); |
| } |
| |
| gcc_assert (POINTER_TYPE_P (TREE_TYPE (se->expr))); |
| gcc_assert (se->string_length |
| && TREE_CODE (TREE_TYPE (se->string_length)) == INTEGER_TYPE); |
| } |
| |
| |
| /* Generate code for assignment of scalar variables. Includes character |
| strings and derived types with allocatable components. */ |
| |
| tree |
| gfc_trans_scalar_assign (gfc_se * lse, gfc_se * rse, gfc_typespec ts, |
| bool l_is_temp, bool r_is_var) |
| { |
| stmtblock_t block; |
| tree tmp; |
| tree cond; |
| |
| gfc_init_block (&block); |
| |
| if (ts.type == BT_CHARACTER) |
| { |
| gcc_assert (lse->string_length != NULL_TREE |
| && rse->string_length != NULL_TREE); |
| |
| gfc_conv_string_parameter (lse); |
| gfc_conv_string_parameter (rse); |
| |
| gfc_add_block_to_block (&block, &lse->pre); |
| gfc_add_block_to_block (&block, &rse->pre); |
| |
| gfc_trans_string_copy (&block, lse->string_length, lse->expr, |
| rse->string_length, rse->expr); |
| } |
| else if (ts.type == BT_DERIVED && ts.derived->attr.alloc_comp) |
| { |
| cond = NULL_TREE; |
| |
| /* Are the rhs and the lhs the same? */ |
| if (r_is_var) |
| { |
| cond = fold_build2 (EQ_EXPR, boolean_type_node, |
| build_fold_addr_expr (lse->expr), |
| build_fold_addr_expr (rse->expr)); |
| cond = gfc_evaluate_now (cond, &lse->pre); |
| } |
| |
| /* Deallocate the lhs allocated components as long as it is not |
| the same as the rhs. */ |
| if (!l_is_temp) |
| { |
| tmp = gfc_deallocate_alloc_comp (ts.derived, lse->expr, 0); |
| if (r_is_var) |
| tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp); |
| gfc_add_expr_to_block (&lse->pre, tmp); |
| } |
| |
| gfc_add_block_to_block (&block, &lse->pre); |
| gfc_add_block_to_block (&block, &rse->pre); |
| |
| gfc_add_modify_expr (&block, lse->expr, |
| fold_convert (TREE_TYPE (lse->expr), rse->expr)); |
| |
| /* Do a deep copy if the rhs is a variable, if it is not the |
| same as the lhs. */ |
| if (r_is_var) |
| { |
| tmp = gfc_copy_alloc_comp (ts.derived, rse->expr, lse->expr, 0); |
| tmp = build3_v (COND_EXPR, cond, build_empty_stmt (), tmp); |
| gfc_add_expr_to_block (&block, tmp); |
| } |
| } |
| else |
| { |
| gfc_add_block_to_block (&block, &lse->pre); |
| gfc_add_block_to_block (&block, &rse->pre); |
| |
| gfc_add_modify_expr (&block, lse->expr, |
| fold_convert (TREE_TYPE (lse->expr), rse->expr)); |
| } |
| |
| gfc_add_block_to_block (&block, &lse->post); |
| gfc_add_block_to_block (&block, &rse->post); |
| |
| return gfc_finish_block (&block); |
| } |
| |
| |
| /* Try to translate array(:) = func (...), where func is a transformational |
| array function, without using a temporary. Returns NULL is this isn't the |
| case. */ |
| |
| static tree |
| gfc_trans_arrayfunc_assign (gfc_expr * expr1, gfc_expr * expr2) |
| { |
| gfc_se se; |
| gfc_ss *ss; |
| gfc_ref * ref; |
| bool seen_array_ref; |
| |
| /* The caller has already checked rank>0 and expr_type == EXPR_FUNCTION. */ |
| if (expr2->value.function.isym && !gfc_is_intrinsic_libcall (expr2)) |
| return NULL; |
| |
| /* Elemental functions don't need a temporary anyway. */ |
| if (expr2->value.function.esym != NULL |
| && expr2->value.function.esym->attr.elemental) |
| return NULL; |
| |
| /* Fail if EXPR1 can't be expressed as a descriptor. */ |
| if (gfc_ref_needs_temporary_p (expr1->ref)) |
| return NULL; |
| |
| /* Functions returning pointers need temporaries. */ |
| if (expr2->symtree->n.sym->attr.pointer |
| || expr2->symtree->n.sym->attr.allocatable) |
| return NULL; |
| |
| /* Character array functions need temporaries unless the |
| character lengths are the same. */ |
| if (expr2->ts.type == BT_CHARACTER && expr2->rank > 0) |
| { |
| if (expr1->ts.cl->length == NULL |
| || expr1->ts.cl->length->expr_type != EXPR_CONSTANT) |
| return NULL; |
| |
| if (expr2->ts.cl->length == NULL |
| || expr2->ts.cl->length->expr_type != EXPR_CONSTANT) |
| return NULL; |
| |
| if (mpz_cmp (expr1->ts.cl->length->value.integer, |
| expr2->ts.cl->length->value.integer) != 0) |
| return NULL; |
| } |
| |
| /* Check that no LHS component references appear during an array |
| reference. This is needed because we do not have the means to |
| span any arbitrary stride with an array descriptor. This check |
| is not needed for the rhs because the function result has to be |
| a complete type. */ |
| seen_array_ref = false; |
| for (ref = expr1->ref; ref; ref = ref->next) |
| { |
| if (ref->type == REF_ARRAY) |
| seen_array_ref= true; |
| else if (ref->type == REF_COMPONENT && seen_array_ref) |
| return NULL; |
| } |
| |
| /* Check for a dependency. */ |
| if (gfc_check_fncall_dependency (expr1, INTENT_OUT, |
| expr2->value.function.esym, |
| expr2->value.function.actual)) |
| return NULL; |
| |
| /* The frontend doesn't seem to bother filling in expr->symtree for intrinsic |
| functions. */ |
| gcc_assert (expr2->value.function.isym |
| || (gfc_return_by_reference (expr2->value.function.esym) |
| && expr2->value.function.esym->result->attr.dimension)); |
| |
| ss = gfc_walk_expr (expr1); |
| gcc_assert (ss != gfc_ss_terminator); |
| gfc_init_se (&se, NULL); |
| gfc_start_block (&se.pre); |
| se.want_pointer = 1; |
| |
| gfc_conv_array_parameter (&se, expr1, ss, 0); |
| |
| se.direct_byref = 1; |
| se.ss = gfc_walk_expr (expr2); |
| gcc_assert (se.ss != gfc_ss_terminator); |
| gfc_conv_function_expr (&se, expr2); |
| gfc_add_block_to_block (&se.pre, &se.post); |
| |
| return gfc_finish_block (&se.pre); |
| } |
| |
| |
| /* Translate an assignment. Most of the code is concerned with |
| setting up the scalarizer. */ |
| |
| tree |
| gfc_trans_assignment (gfc_expr * expr1, gfc_expr * expr2, bool init_flag) |
| { |
| gfc_se lse; |
| gfc_se rse; |
| gfc_ss *lss; |
| gfc_ss *lss_section; |
| gfc_ss *rss; |
| gfc_loopinfo loop; |
| tree tmp; |
| stmtblock_t block; |
| stmtblock_t body; |
| bool l_is_temp; |
| |
| /* Special case a single function returning an array. */ |
| if (expr2->expr_type == EXPR_FUNCTION && expr2->rank > 0) |
| { |
| tmp = gfc_trans_arrayfunc_assign (expr1, expr2); |
| if (tmp) |
| return tmp; |
| } |
| |
| /* Assignment of the form lhs = rhs. */ |
| gfc_start_block (&block); |
| |
| gfc_init_se (&lse, NULL); |
| gfc_init_se (&rse, NULL); |
| |
| /* Walk the lhs. */ |
| lss = gfc_walk_expr (expr1); |
| rss = NULL; |
| if (lss != gfc_ss_terminator) |
| { |
| /* The assignment needs scalarization. */ |
| lss_section = lss; |
| |
| /* Find a non-scalar SS from the lhs. */ |
| while (lss_section != gfc_ss_terminator |
| && lss_section->type != GFC_SS_SECTION) |
| lss_section = lss_section->next; |
| |
| gcc_assert (lss_section != gfc_ss_terminator); |
| |
| /* Initialize the scalarizer. */ |
| gfc_init_loopinfo (&loop); |
| |
| /* Walk the rhs. */ |
| rss = gfc_walk_expr (expr2); |
| if (rss == gfc_ss_terminator) |
| { |
| /* The rhs is scalar. Add a ss for the expression. */ |
| rss = gfc_get_ss (); |
| rss->next = gfc_ss_terminator; |
| rss->type = GFC_SS_SCALAR; |
| rss->expr = expr2; |
| } |
| /* Associate the SS with the loop. */ |
| gfc_add_ss_to_loop (&loop, lss); |
| gfc_add_ss_to_loop (&loop, rss); |
| |
| /* Calculate the bounds of the scalarization. */ |
| gfc_conv_ss_startstride (&loop); |
| /* Resolve any data dependencies in the statement. */ |
| gfc_conv_resolve_dependencies (&loop, lss, rss); |
| /* Setup the scalarizing loops. */ |
| gfc_conv_loop_setup (&loop); |
| |
| /* Setup the gfc_se structures. */ |
| gfc_copy_loopinfo_to_se (&lse, &loop); |
| gfc_copy_loopinfo_to_se (&rse, &loop); |
| |
| rse.ss = rss; |
| gfc_mark_ss_chain_used (rss, 1); |
| if (loop.temp_ss == NULL) |
| { |
| lse.ss = lss; |
| gfc_mark_ss_chain_used (lss, 1); |
| } |
| else |
| { |
| lse.ss = loop.temp_ss; |
| gfc_mark_ss_chain_used (lss, 3); |
| gfc_mark_ss_chain_used (loop.temp_ss, 3); |
| } |
| |
| /* Start the scalarized loop body. */ |
| gfc_start_scalarized_body (&loop, &body); |
| } |
| else |
| gfc_init_block (&body); |
| |
| l_is_temp = (lss != gfc_ss_terminator && loop.temp_ss != NULL); |
| |
| /* Translate the expression. */ |
| gfc_conv_expr (&rse, expr2); |
| |
| if (l_is_temp) |
| { |
| gfc_conv_tmp_array_ref (&lse); |
| gfc_advance_se_ss_chain (&lse); |
| } |
| else |
| gfc_conv_expr (&lse, expr1); |
| |
| tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts, |
| l_is_temp || init_flag, |
| expr2->expr_type == EXPR_VARIABLE); |
| gfc_add_expr_to_block (&body, tmp); |
| |
| if (lss == gfc_ss_terminator) |
| { |
| /* Use the scalar assignment as is. */ |
| gfc_add_block_to_block (&block, &body); |
| } |
| else |
| { |
| gcc_assert (lse.ss == gfc_ss_terminator |
| && rse.ss == gfc_ss_terminator); |
| |
| if (l_is_temp) |
| { |
| gfc_trans_scalarized_loop_boundary (&loop, &body); |
| |
| /* We need to copy the temporary to the actual lhs. */ |
| gfc_init_se (&lse, NULL); |
| gfc_init_se (&rse, NULL); |
| gfc_copy_loopinfo_to_se (&lse, &loop); |
| gfc_copy_loopinfo_to_se (&rse, &loop); |
| |
| rse.ss = loop.temp_ss; |
| lse.ss = lss; |
| |
| gfc_conv_tmp_array_ref (&rse); |
| gfc_advance_se_ss_chain (&rse); |
| gfc_conv_expr (&lse, expr1); |
| |
| gcc_assert (lse.ss == gfc_ss_terminator |
| && rse.ss == gfc_ss_terminator); |
| |
| tmp = gfc_trans_scalar_assign (&lse, &rse, expr1->ts, |
| false, false); |
| gfc_add_expr_to_block (&body, tmp); |
| } |
| |
| /* Generate the copying loops. */ |
| gfc_trans_scalarizing_loops (&loop, &body); |
| |
| /* Wrap the whole thing up. */ |
| gfc_add_block_to_block (&block, &loop.pre); |
| gfc_add_block_to_block (&block, &loop.post); |
| |
| gfc_cleanup_loop (&loop); |
| } |
| |
| return gfc_finish_block (&block); |
| } |
| |
| tree |
| gfc_trans_init_assign (gfc_code * code) |
| { |
| return gfc_trans_assignment (code->expr, code->expr2, true); |
| } |
| |
| tree |
| gfc_trans_assign (gfc_code * code) |
| { |
| return gfc_trans_assignment (code->expr, code->expr2, false); |
| } |