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author | Ben Cheng <bccheng@google.com> | 2013-03-28 11:14:20 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2013-03-28 12:40:33 -0700 |
commit | af0c51ac87ab2a87caa03fa108f0d164987a2764 (patch) | |
tree | 4b8b470f7c5b69642fdab8d0aa1fbc148d02196b /gcc-4.8/gcc/fortran/convert.c | |
parent | d87cae247d39ebf4f5a6bf25c932a14d2fdb9384 (diff) | |
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[GCC 4.8] Initial check-in of GCC 4.8.0
Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771
Diffstat (limited to 'gcc-4.8/gcc/fortran/convert.c')
-rw-r--r-- | gcc-4.8/gcc/fortran/convert.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/gcc-4.8/gcc/fortran/convert.c b/gcc-4.8/gcc/fortran/convert.c new file mode 100644 index 000000000..466b48abb --- /dev/null +++ b/gcc-4.8/gcc/fortran/convert.c @@ -0,0 +1,112 @@ +/* Data type conversion + Copyright (C) 1987-2013 Free Software Foundation, Inc. + +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 3, 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 COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + + +/* This file contains the functions for converting expressions to + different data types for the translation of the gfortran internal + representation to GIMPLE. The only entry point is `convert'. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tree.h" +#include "convert.h" + +/* Prepare expr to be an argument of a TRUTH_NOT_EXPR, + or validate its data type for a GIMPLE `if' or `while' statement. + + The resulting type should always be `boolean_type_node'. */ + +static tree +truthvalue_conversion (tree expr) +{ + switch (TREE_CODE (TREE_TYPE (expr))) + { + case BOOLEAN_TYPE: + if (TREE_TYPE (expr) == boolean_type_node) + return expr; + else if (COMPARISON_CLASS_P (expr)) + { + TREE_TYPE (expr) = boolean_type_node; + return expr; + } + else if (TREE_CODE (expr) == NOP_EXPR) + return fold_build1_loc (input_location, NOP_EXPR, + boolean_type_node, TREE_OPERAND (expr, 0)); + else + return fold_build1_loc (input_location, NOP_EXPR, boolean_type_node, + expr); + + case INTEGER_TYPE: + if (TREE_CODE (expr) == INTEGER_CST) + return integer_zerop (expr) ? boolean_false_node : boolean_true_node; + else + return fold_build2_loc (input_location, NE_EXPR, boolean_type_node, + expr, build_int_cst (TREE_TYPE (expr), 0)); + + default: + gcc_unreachable (); + } +} + +/* Create an expression whose value is that of EXPR, + converted to type TYPE. The TREE_TYPE of the value + is always TYPE. This function implements all reasonable + conversions; callers should filter out those that are + not permitted by the language being compiled. */ + +tree +convert (tree type, tree expr) +{ + tree e = expr; + enum tree_code code; + + if (type == TREE_TYPE (expr)) + return expr; + + if (TREE_CODE (type) == ERROR_MARK + || TREE_CODE (expr) == ERROR_MARK + || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK) + return expr; + + gcc_checking_assert (TREE_CODE (TREE_TYPE (expr)) != VOID_TYPE); + + if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr))) + return fold_build1_loc (input_location, NOP_EXPR, type, expr); + + code = TREE_CODE (type); + if (code == VOID_TYPE) + return fold_build1_loc (input_location, CONVERT_EXPR, type, e); + if (code == BOOLEAN_TYPE) + return fold_build1_loc (input_location, NOP_EXPR, type, + truthvalue_conversion (e)); + if (code == INTEGER_TYPE) + return fold (convert_to_integer (type, e)); + if (code == POINTER_TYPE || code == REFERENCE_TYPE) + return fold (convert_to_pointer (type, e)); + if (code == REAL_TYPE) + return fold (convert_to_real (type, e)); + if (code == COMPLEX_TYPE) + return fold (convert_to_complex (type, e)); + if (code == VECTOR_TYPE) + return fold (convert_to_vector (type, e)); + + gcc_unreachable (); +} + |