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[Bug rtl-optimization/67609] [5/6 Regression] Generates wrong code for SSE2 _mm_load_pd
- From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 23 Oct 2015 05:02:16 +0000
- Subject: [Bug rtl-optimization/67609] [5/6 Regression] Generates wrong code for SSE2 _mm_load_pd
- Auto-submitted: auto-generated
- References: <bug-67609-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67609
--- Comment #25 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Vladimir Makarov from comment #24)
> (In reply to Richard Henderson from comment #23)
> > Created attachment 36563 [details]
> > possible patch
> >
> > Certainly this fixes the executable test case from #c13.
>
> The patch will force any pseudo which is accessed as a subregister of DImode
> to be spilled.
Probably, I exaggerated with "any", but still the patch will result in more
loads/stores. So it would be nice to benchmark it. I'll try to do this on
Friday.