[Bug lto/83201] [7/8 Regression] SPEC CPU2017 505.mcf_f produces incorrect output when built with -flto and FDO

rguenth at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Wed Nov 29 08:32:00 GMT 2017


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.


More information about the Gcc-bugs mailing list