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

[ubizjak at gmail dot com]

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

--- Comment #21 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.

You are looking in the cold section. This is by design, the splitter is
conditioned on optimize_function_for_speed.

Nevertheless, I'm cleaning a bit float_extend and float_truncate
splitter/peephole2 pattern and will submit the patch soon.