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[Bug target/86828] [6/7 Regression] wrong-code bug with "-march=knl -Ofast" (invalid memory reference)
- From: "janus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 02 Aug 2018 12:16:22 +0000
- Subject: [Bug target/86828] [6/7 Regression] wrong-code bug with "-march=knl -Ofast" (invalid memory reference)
- Auto-submitted: auto-generated
- References: <bug-86828-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86828
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Richard Biener from comment #1)
> Would be nice to know what fixed this (or maybe know if it just went latent).
I think I remember having some intermediate versions during the reduction that
failed also with 8 and trunk. So I'd guess it just went dormant, or the
segfault depends on memory layout or something.
Wanted to try valgrind on the exe, but it seems it doesn't support AVX-512 yet
(at least the version I have).