------- Comment #2 from pinskia at gcc dot gnu dot org 2007-07-05 19:02 -------
This patch works for me:
Index: fold-const.c
===================================================================
--- fold-const.c (revision 126338)
+++ fold-const.c (working copy)
@@ -282,14 +282,8 @@
HOST_WIDE_INT high, int overflowable,
bool overflowed)
{
- int sign_extended_type;
bool overflow;
- /* Size types *are* sign extended. */
- sign_extended_type = (!TYPE_UNSIGNED (type)
- || (TREE_CODE (type) == INTEGER_TYPE
- && TYPE_IS_SIZETYPE (type)));
-
overflow = fit_double_type (low, high, &low, &high, type);
/* If we need to set overflow flags, return a new unshared node. */
@@ -297,7 +291,7 @@
{
if (overflowed
|| overflowable < 0
- || (overflowable > 0 && sign_extended_type))
+ || (overflowable > 0 && !TYPE_UNSIGNED (type)))
{
tree t = make_node (INTEGER_CST);
TREE_INT_CST_LOW (t) = low;
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32628
