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[Bug lto/83201] [7/8 Regression] SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 29 Nov 2017 08:32:28 +0000
- Subject: [Bug lto/83201] [7/8 Regression] SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO
- Auto-submitted: auto-generated
- References: <bug-83201-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83201
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Target Milestone|--- |7.3
Summary|SPEC CPU2017 505.mcf_f |[7/8 Regression] SPEC
|produces incorrect output |CPU2017 505.mcf_f produces
|when built with -flto and |incorrect output when built
|FDO |with -flto and FDO
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Pat Haugen from comment #2)
> (In reply to Pat Haugen from comment #0)
> >
> > It appears to work fine with r254943. I'll start a bisect and post results.
>
> My bisect showed that r254946 was where it started failing on trunk. And
> yes, it fails with current GCC 7 branch too.
Probably a bogus bisect point, for a few revisions inlining was broken so it's
probably broken a bit earlier as well.