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[Bug target/38825] missed optimization: register renaming in unrolled loop
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Jan 2009 15:15:55 -0000
- Subject: [Bug target/38825] missed optimization: register renaming in unrolled loop
- References: <bug-38825-12873@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rguenth at gcc dot gnu dot org 2009-01-13 15:15 -------
Note that your testcase has moved the load _mm_load_ps(in+4); before the
store _mm_store_ps(out, result); which the compiler cannot do itself because
they may alias.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38825