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Re: [i386] Don't expand vector abs+neg to xor immediately
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Richard Henderson <rth at redhat dot com>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Sat, 23 Oct 2010 08:50:26 -0700
- Subject: Re: [i386] Don't expand vector abs+neg to xor immediately
- References: <4CC1E8C5.2060602@redhat.com>
On Fri, Oct 22, 2010 at 12:40 PM, Richard Henderson <rth@redhat.com> wrote:
> This solves the problem that Richi saw on x86 with fma
> plus negation on vectors not being merged into fnma etc
> during combine.
>
> Tested on x86_64-linux.
>
This caused:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46144
--
H.J.