------- Comment #6 from dorit at il dot ibm dot com 2006-01-04 07:33 -------
Maybe related to:
2005-12-26 Kazu Hirata <[EMAIL PROTECTED]>
PR tree-optimization/25125
* convert.c (convert_to_integer): Don't narrow the type of a
PLUX_EXPR or MINUS_EXPR if !flag_wrapv and the unwidened type
is signed.
(indeed this testcase fails vectorization due to cast to unsigned char).
If that's the case, it should probably be xfailed and the PR should be "missed
optimization"
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25590
