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[Bug target/63599] "wrong" branch optimization with Ofast in a loop
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 20 Oct 2014 09:56:37 +0000
- Subject: [Bug target/63599] "wrong" branch optimization with Ofast in a loop
- Auto-submitted: auto-generated
- References: <bug-63599-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63599
--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
ifcvt making a transformation that doesn't help vectorization and ends up
pessimizing the code... not really the first time this happens. I believe Jakub
had a big patch for that, but it never got in. Maybe vectors could be
special-cased if we never vectorize them anyway.