[Bug ipa/65028] [5 Regression] 450.soplex in SPEC CPU 2006 is miscompiled

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65028

--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Jambor from comment #10)
> (In reply to H.J. Lu from comment #9)
> > The same bug affects 252.eon in SPEC CPU 2000 on x32:
> 
> ...
> 
> > 
> > The fix isn't sufficient since adding -fno-ipa-cp fixes eon on x32.
> 
> I really doubt that it is "the same bug."  Just that -fno-ipa-cp
> avoids it certainly does not suffice to make that conclusion.

The symptom is very similar, that is eon died very early.

> Anyway, I will try to find some time to look soon, although setting up
> x32 environment will take me some time.  I suppose this bug also
> manifests itself with -O3 and LTO?

It ONLY shows up with -O3 -funroll-loops -ffast-math -flto