[Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.

ubizjak at gmail dot com gcc-bugzilla@gcc.gnu.org
Tue May 3 13:03:00 GMT 2016


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70873

--- Comment #13 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #12)

> I still see:
> 
> 	vcvtss2sd	(%ecx,%eax,4), %xmm5, %xmm5
> 
> without vxorpd.

Maybe vxorpd gets scheduled away from the insn? What is the name of the
pattern?


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