[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 #15 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jan Hubicka from comment #14)
> Thanks for looking into that!
> > 
> > Why do we think rPrimary is 16-byte aligned when it is only 8-byte aligned?
> 
> ipa-cp newly does alignment propagation.  You may try to just disable it
> by short cirucuiting ipcp_store_alignment_results

Disable ipcp_store_alignment_results fixes the bug.

> (also you ought to be able to find the wrong alignment upgrade in the ipa-cp
> dumps)

I will do it next.