+2006-03-29 Roger Sayle <roger@eyesopen.com>
+
+ * convert.c (convert_to_pointer): Preserve the TREE_OVERFLOW
+ and TREE_CONSTANT_OVERFLOW bits of the argument. Return
+ quickly if the argument is already of the correct type.
+ Call fold_build1 instead of build1. Tidy up blank lines.
+
2006-03-29 David Edelsohn <edelsohn@gnu.org>
* genemit.c (main): Add tm-constrs.h to included headers.
#include "toplev.h"
#include "langhooks.h"
#include "real.h"
-/* Convert EXPR to some pointer or reference type TYPE.
+/* Convert EXPR to some pointer or reference type TYPE.
EXPR must be pointer, reference, integer, enumeral, or literal zero;
in other cases error is called. */
tree
convert_to_pointer (tree type, tree expr)
{
+ if (TREE_TYPE (expr) == type)
+ return expr;
+
if (integer_zerop (expr))
- return build_int_cst (type, 0);
+ {
+ tree t = build_int_cst (type, 0);
+ if (TREE_OVERFLOW (expr) || TREE_CONSTANT_OVERFLOW (expr))
+ t = force_fit_type (t, 0, TREE_OVERFLOW (expr),
+ TREE_CONSTANT_OVERFLOW (expr));
+ return t;
+ }
switch (TREE_CODE (TREE_TYPE (expr)))
{
case POINTER_TYPE:
case REFERENCE_TYPE:
- return build1 (NOP_EXPR, type, expr);
+ return fold_build1 (NOP_EXPR, type, expr);
case INTEGER_TYPE:
case ENUMERAL_TYPE: