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[Bug target/70465] [5/6 Regression] Poor code for x87 asm
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 21 Feb 2017 16:01:44 +0000
- Subject: [Bug target/70465] [5/6 Regression] Poor code for x87 asm
- Auto-submitted: auto-generated
- References: <bug-70465-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70465
--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #19)
> (In reply to Jakub Jelinek from comment #18)
> > Created attachment 40808 [details]
> > gcc7-pr70465-2.patch
> >
> > Now actually working patch for this testcase.
>
> +/* { dg-do compile { target ia32 } } */
> +/* { dg-options "-Ofast -mfpmath=387 -fomit-frame-pointer" } */
>
> Is there a reason that this test (and the previous one) is limited to ia32
> only? -mfpmath=387 should give the same result on x86_64, too.
Indeed, no reason. Consider { target ia32 } dropped from this one.
The pr70465.c tests needs it though, because there are intervening stores.