/* Language-level data type conversion for GNU C.
- Copyright (C) 1987, 1988, 1991, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1988, 1991, 1998, 2002, 2003, 2004, 2005, 2007
+ 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 2, or (at your option) any later
+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
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, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* This file contains the functions for converting C expressions
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "flags.h"
#include "convert.h"
+#include "c-common.h"
+#include "c-tree.h"
+#include "langhooks.h"
#include "toplev.h"
+#include "target.h"
/* Change of width--truncation and extension of integers or reals--
is represented with NOP_EXPR. Proper functioning of many things
not permitted by the language being compiled. */
tree
-convert (type, expr)
- tree type, expr;
+convert (tree type, tree expr)
{
tree e = expr;
enum tree_code code = TREE_CODE (type);
+ const char *invalid_conv_diag;
- if (type == TREE_TYPE (expr)
- || TREE_CODE (expr) == ERROR_MARK
- || code == ERROR_MARK || TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
+ if (type == error_mark_node
+ || expr == error_mark_node
+ || TREE_TYPE (expr) == error_mark_node)
+ return error_mark_node;
+
+ if ((invalid_conv_diag
+ = targetm.invalid_conversion (TREE_TYPE (expr), type)))
+ {
+ error (invalid_conv_diag);
+ return error_mark_node;
+ }
+
+ if (type == TREE_TYPE (expr))
return expr;
if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr)))
- return fold (build1 (NOP_EXPR, type, expr));
+ return fold_convert (type, expr);
if (TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK)
return error_mark_node;
if (TREE_CODE (TREE_TYPE (expr)) == VOID_TYPE)
return error_mark_node;
}
if (code == VOID_TYPE)
- return build1 (CONVERT_EXPR, type, e);
-#if 0
- /* This is incorrect. A truncation can't be stripped this way.
- Extensions will be stripped by the use of get_unwidened. */
- if (TREE_CODE (expr) == NOP_EXPR)
- return convert (type, TREE_OPERAND (expr, 0));
-#endif
+ return fold_convert (type, e);
if (code == INTEGER_TYPE || code == ENUMERAL_TYPE)
return fold (convert_to_integer (type, e));
if (code == BOOLEAN_TYPE)
- {
- tree t = c_common_truthvalue_conversion (expr);
- /* If it returns a NOP_EXPR, we must fold it here to avoid
- infinite recursion between fold () and convert (). */
- if (TREE_CODE (t) == NOP_EXPR)
- return fold (build1 (NOP_EXPR, type, TREE_OPERAND (t, 0)));
- else
- return fold (build1 (NOP_EXPR, type, t));
- }
+ return fold_convert (type, c_objc_common_truthvalue_conversion (expr));
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 == FIXED_POINT_TYPE)
+ return fold (convert_to_fixed (type, e));
if (code == COMPLEX_TYPE)
return fold (convert_to_complex (type, e));
if (code == VECTOR_TYPE)
return fold (convert_to_vector (type, e));
+ if ((code == RECORD_TYPE || code == UNION_TYPE)
+ && lang_hooks.types_compatible_p (type, TREE_TYPE (expr)))
+ return e;
error ("conversion to non-scalar type requested");
return error_mark_node;