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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107273] wrong code at -O3 on x86_64-linux-gnu
Date: Mon, 17 Oct 2022 16:12:35 +0000 [thread overview]
Message-ID: <bug-107273-4-9J8d2X17iO@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-107273-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107273
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|DUPLICATE |---
Last reconfirmed| |2022-10-17
Status|RESOLVED |REOPENED
Ever confirmed|0 |1
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Hongtao.liu from comment #4)
> Looks like the same issue as PR107172 since below change can also pass all
> the testcase in the PR.
>
> diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
> index 8e847520491..be815341af5 100644
> --- a/gcc/config/i386/i386.md
> +++ b/gcc/config/i386/i386.md
> @@ -21335,7 +21335,7 @@ (define_insn "*x86_mov<mode>cc_0_m1_neg"
> (define_expand "x86_mov<mode>cc_0_m1_neg"
> [(parallel
> [(set (match_operand:SWI48 0 "register_operand")
> - (neg:SWI48 (ltu:SWI48 (reg:CCC FLAGS_REG) (const_int 0))))
> + (neg:SWI48 (ltu:SWI48 (reg:CC FLAGS_REG) (const_int 0))))
> (clobber (reg:CC FLAGS_REG))])])
>
> (define_split
This doesn't fix the -O3 issue in the first testcase nor the second testcase.
next prev parent reply other threads:[~2022-10-17 16:12 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-15 20:53 [Bug tree-optimization/107273] New: " zhendong.su at inf dot ethz.ch
2022-10-15 20:57 ` [Bug tree-optimization/107273] " zhendong.su at inf dot ethz.ch
2022-10-15 21:00 ` zhendong.su at inf dot ethz.ch
2022-10-15 21:04 ` zhendong.su at inf dot ethz.ch
2022-10-17 3:21 ` crazylht at gmail dot com
2022-10-17 7:55 ` rguenth at gcc dot gnu.org
2022-10-17 16:12 ` hjl.tools at gmail dot com [this message]
2022-10-17 19:05 ` [Bug tree-optimization/107273] wrong code at -O3 on x86_64-linux-gnu by r13-3281 hjl.tools at gmail dot com
2022-10-17 19:07 ` hjl.tools at gmail dot com
2022-10-17 20:42 ` hjl.tools at gmail dot com
2022-10-17 21:03 ` amacleod at redhat dot com
2022-10-18 1:05 ` cvs-commit at gcc dot gnu.org
2022-10-18 1:05 ` amacleod at redhat dot com
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