10c7a96fe6
* convert.c (convert): Replace fold (buildN (...)) with fold_buildN. * trans-array.c (gfc_trans_allocate_array_storage, gfc_trans_allocate_temp_array gfc_trans_array_constructor_value, gfc_conv_array_index_ref, gfc_trans_array_bound_check, gfc_conv_array_index_offset, gfc_conv_scalarized_array_ref, gfc_conv_array_ref, gfc_trans_preloop_setup, gfc_conv_ss_startstride, gfc_conv_loop_setup, gfc_array_init_size, gfc_trans_array_bounds, gfc_trans_auto_array_allocation, gfc_trans_dummy_array_bias, gfc_conv_expr_descriptor): Likewise. * trans-expr.c (gfc_conv_powi, gfc_conv_string_tmp, gfc_conv_concat_op, gfc_conv_expr_op): Likewise. * trans-intrinsic.c (build_round_expr, gfc_conv_intrinsic_bound, gfc_conv_intrinsic_cmplx, gfc_conv_intrinsic_sign, gfc_conv_intrinsic_minmaxloc, gfc_conv_intrinsic_minmaxval, gfc_conv_intrinsic_btest, gfc_conv_intrinsic_bitop, gfc_conv_intrinsic_singlebitop, gfc_conv_intrinsic_ibits, gfc_conv_intrinsic_ishft, gfc_conv_intrinsic_ishftc, gfc_conv_intrinsic_merge, prepare_arg_info, gfc_conv_intrinsic_rrspacing, gfc_conv_intrinsic_repeat): Likewise. * trans-stmt.c (gfc_trans_simple_do, gfc_trans_do, gfc_trans_do_while, gfc_trans_forall_loop, gfc_do_allocate, generate_loop_for_temp_to_lhs, generate_loop_for_rhs_to_temp, compute_inner_temp_size, allocate_temp_for_forall_nest, gfc_trans_pointer_assign_need_temp, gfc_trans_forall_1, gfc_evaluate_where_mask, gfc_trans_where_assign): Likewise. * trans-types.c (gfc_get_dtype, gfc_get_array_type_bounds): Likewise. * trans.c (gfc_add_modify_expr): Likewise. From-SVN: r96926
125 lines
4.3 KiB
C
125 lines
4.3 KiB
C
/* Language-level data type conversion for GNU C.
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Copyright (C) 1987, 1988, 1991, 1998, 2002 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* This file contains the functions for converting C expressions
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to different data types. The only entry point is `convert'.
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Every language front end must have a `convert' function
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but what kind of conversions it does will depend on the language. */
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/* copied from the f77 frontend I think */
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/* copied from c-convert.c without significant modification*/
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/* Change of width--truncation and extension of integers or reals--
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is represented with NOP_EXPR. Proper functioning of many things
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assumes that no other conversions can be NOP_EXPRs.
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*/
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/* I've added support for WITH_RECORD_EXPR. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tree.h"
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#include "flags.h"
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#include "convert.h"
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#include "toplev.h"
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#include "gfortran.h"
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#include "trans.h"
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/*
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Conversion between integer and pointer is represented with CONVERT_EXPR.
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Converting integer to real uses FLOAT_EXPR
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and real to integer uses FIX_TRUNC_EXPR.
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Here is a list of all the functions that assume that widening and
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narrowing is always done with a NOP_EXPR:
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In convert.c, convert_to_integer.
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In c-typeck.c, build_binary_op (boolean ops), and
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c_common_truthvalue_conversion.
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In expr.c: expand_expr, for operands of a MULT_EXPR.
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In fold-const.c: fold.
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In tree.c: get_narrower and get_unwidened. */
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/* Subroutines of `convert'. */
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/* Create an expression whose value is that of EXPR,
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converted to type TYPE. The TREE_TYPE of the value
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is always TYPE. This function implements all reasonable
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conversions; callers should filter out those that are
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not permitted by the language being compiled. */
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/* We are assuming that given a SIMPLE val, the result will be a SIMPLE rhs.
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If this is not the case, we will abort with an internal error. */
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tree
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convert (tree type, tree expr)
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{
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tree e = expr;
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enum tree_code code = TREE_CODE (type);
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if (type == TREE_TYPE (expr)
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|| TREE_CODE (expr) == ERROR_MARK
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|| code == ERROR_MARK || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
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return expr;
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if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr)))
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return fold_build1 (NOP_EXPR, type, expr);
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if (TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
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return error_mark_node;
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if (TREE_CODE (TREE_TYPE (expr)) == VOID_TYPE)
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{
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error ("void value not ignored as it ought to be");
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return error_mark_node;
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}
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if (code == VOID_TYPE)
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return build1 (CONVERT_EXPR, type, e);
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#if 0
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/* This is incorrect. A truncation can't be stripped this way.
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Extensions will be stripped by the use of get_unwidened. */
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if (TREE_CODE (expr) == NOP_EXPR)
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return convert (type, TREE_OPERAND (expr, 0));
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#endif
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if (code == INTEGER_TYPE || code == ENUMERAL_TYPE)
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return fold (convert_to_integer (type, e));
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if (code == BOOLEAN_TYPE)
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{
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e = gfc_truthvalue_conversion (e);
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/* If we have a NOP_EXPR, we must fold it here to avoid
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infinite recursion between fold () and convert (). */
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if (TREE_CODE (e) == NOP_EXPR)
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return fold_build1 (NOP_EXPR, type, TREE_OPERAND (e, 0));
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else
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return fold_build1 (NOP_EXPR, type, e);
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}
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if (code == POINTER_TYPE || code == REFERENCE_TYPE)
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return fold (convert_to_pointer (type, e));
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if (code == REAL_TYPE)
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return fold (convert_to_real (type, e));
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if (code == COMPLEX_TYPE)
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return fold (convert_to_complex (type, e));
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if (code == VECTOR_TYPE)
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return fold (convert_to_vector (type, e));
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error ("conversion to non-scalar type requested");
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return error_mark_node;
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}
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