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[Bug middle-end/44297] Big spec cpu2006 prefetch regressions on gcc 4.6 on x86
- From: "changpeng dot fang at amd dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 27 May 2010 20:55:31 -0000
- Subject: [Bug middle-end/44297] Big spec cpu2006 prefetch regressions on gcc 4.6 on x86
- References: <bug-44297-18740@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from changpeng dot fang at amd dot com 2010-05-27 20:55 -------
To me, non-constant step prefetching seems not fit into the existing
prefetching
framework. non-constant stride prevent any reuse analysis, and thus prefetching
is kind of blindly.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44297