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[Bug bootstrap/69677] [6 Regression] bootstrap failed with --with-arch=corei7 --with-cpu=corei7
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 05 Feb 2016 11:21:35 +0000
- Subject: [Bug bootstrap/69677] [6 Regression] bootstrap failed with --with-arch=corei7 --with-cpu=corei7
- Auto-submitted: auto-generated
- References: <bug-69677-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69677
--- Comment #16 from UroÅ Bizjak <ubizjak at gmail dot com> ---
(In reply to Ilya Enkovich from comment #15)
> (In reply to Jakub Jelinek from comment #13)
> > Fixed.
>
> I think you just hide LRA issue disabling STV and LRA still may generate
> incorrect register fill
Yes, but stage 4 is not the time to solve these kind of bugs. As said, the fix
disables STV for rare and unusual cases. I expect that proper fix will be
developed during gcc-7 time, and this includes various RA fixes.
Previous patch relaxed alignment requirements to 64 bits, and this triggered RA
bug. So, unless we want to delay release for a couple of weeks (a month?), we
will leave alignment to 128 bits.
That doesn't mean that incorrect register fill RA bug should't be fixed during
stage-4. Do we have a small testcase that exposes it?