This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/42652] vectorizer created unaligned vector insns
- From: "hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 14 Jan 2010 17:35:01 -0000
- Subject: [Bug tree-optimization/42652] vectorizer created unaligned vector insns
- References: <bug-42652-391@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from hjl dot tools at gmail dot com 2010-01-14 17:34 -------
Intel AVX architecture won't fault on unaligned load-op instructions
and unaligned VMOV* instructions are as fast as aligned VMOV*
instructions on aligned memory. For AVX, we can always use unaligned
VMOV* instructions, even on aligned memory, to work around this issue
without any performance penalty.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42652