[Bug tree-optimization/29170] autovectorizer converts signed types to unsigned, then can't match patterns

[eplondke at gmail dot com]

------- Comment #1 from eplondke at gmail dot com  2006-09-21 17:05 -------
Created an attachment (id=12304)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12304&action=view)
Test to try signed/unsigned reductions


A simple reduction test.

Change WHATSIGN between "signed" and "unsigned" to try different signedness.

"unsigned" seems to work, "signed" fails.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29170