From: Hongtao Liu <crazylht@gmail.com>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Richard Biener <richard.guenther@gmail.com>,
Jakub Jelinek <jakub@redhat.com>,
Richard Sandiford <richard.sandiford@arm.com>,
liuhongt <hongtao.liu@intel.com>,
GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH 1/2] CALL_INSN may not be a real function call.
Date: Thu, 8 Jul 2021 12:14:15 +0800 [thread overview]
Message-ID: <CAMZc-bwoY=bjNdtOyXvwF1=HDxSRzg3+Kb5D0b47w5NdVZOo+Q@mail.gmail.com> (raw)
In-Reply-To: <20210707234241.GR1583@gate.crashing.org>
On Thu, Jul 8, 2021 at 7:44 AM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
>
> On Wed, Jul 07, 2021 at 11:23:48PM +0800, Hongtao Liu wrote:
> > On Wed, Jul 7, 2021 at 10:54 PM Segher Boessenkool
> > <segher@kernel.crashing.org> wrote:
>
> [ snip some old stuff ]
>
> > > Yeah. This stuff needs a rethink.
> > >
> > > What is wrong with just using an unspec and clobbers?
> > >
> > It's partial and **potential clobber**,
>
> All RTL "clobber" is always a potential clobber, it never guarantees the
> existing value does not survive. You can pass it through some unspec to
> make this more explicit. You will have to add some hook that CSE can
TARGET_INSN_CALLEE_ABI is the hook designed for this.
--
BR,
Hongtao
next prev parent reply other threads:[~2021-07-08 4:14 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-13 9:23 [PATCH] [i386] Fix _mm256_zeroupper to notify LRA that vzeroupper will kill sse registers. [PR target/82735] Hongtao Liu
2021-05-13 9:40 ` Uros Bizjak
2021-05-13 9:43 ` Uros Bizjak
2021-05-13 9:54 ` Jakub Jelinek
2021-05-13 11:32 ` Richard Sandiford
2021-05-13 11:37 ` Jakub Jelinek
2021-05-13 11:52 ` Richard Sandiford
2021-05-14 2:27 ` Hongtao Liu
2021-05-17 8:44 ` Hongtao Liu
2021-05-17 9:56 ` Richard Sandiford
2021-05-18 13:12 ` Hongtao Liu
2021-05-18 15:18 ` Richard Sandiford
2021-05-25 6:04 ` Hongtao Liu
2021-05-25 6:30 ` Hongtao Liu
2021-05-27 5:07 ` Hongtao Liu
2021-05-27 7:05 ` Uros Bizjak
2021-06-01 2:24 ` Hongtao Liu
2021-06-03 6:54 ` [PATCH 1/2] CALL_INSN may not be a real function call liuhongt
2021-06-03 6:54 ` [PATCH 2/2] Fix _mm256_zeroupper by representing the instructions as call_insns in which the call has a special vzeroupper ABI liuhongt
2021-06-04 2:56 ` Hongtao Liu
2021-06-04 6:26 ` Uros Bizjak
2021-06-04 6:34 ` Hongtao Liu
2021-06-07 19:04 ` [PATCH] x86: Don't compile pr82735-[345].c for x32 H.J. Lu
2021-06-04 2:55 ` [PATCH 1/2] CALL_INSN may not be a real function call Hongtao Liu
2021-06-04 7:50 ` Jakub Jelinek
2021-07-05 23:30 ` Segher Boessenkool
2021-07-06 0:03 ` Jeff Law
2021-07-06 1:49 ` Hongtao Liu
2021-07-07 14:55 ` Segher Boessenkool
2021-07-07 17:56 ` Jeff Law
2021-07-06 1:37 ` Hongtao Liu
2021-07-07 2:44 ` Hongtao Liu
2021-07-07 8:15 ` Richard Biener
2021-07-07 14:52 ` Segher Boessenkool
2021-07-07 15:23 ` Hongtao Liu
2021-07-07 23:42 ` Segher Boessenkool
2021-07-08 4:14 ` Hongtao Liu [this message]
2021-07-07 15:32 ` Hongtao Liu
2021-07-07 23:54 ` Segher Boessenkool
2021-07-09 7:20 ` Hongtao Liu
2021-07-07 15:52 ` Hongtao Liu
2021-05-27 7:20 ` [PATCH] [i386] Fix _mm256_zeroupper to notify LRA that vzeroupper will kill sse registers. [PR target/82735] Jakub Jelinek
2021-05-27 10:50 ` Richard Sandiford
2021-06-01 2:22 ` Hongtao Liu
2021-06-01 2:25 ` Hongtao Liu
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