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Re: [PATCH v4] PR middle-end/60281
- From: lin zuojian <manjian2006 at gmail dot com>
- To: Bernd Edlinger <bernd dot edlinger at hotmail dot de>
- Cc: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Ramana Radhakrishnan <ramana dot gcc at googlemail dot com>, Jakub Jelinek <jakub at redhat dot com>
- Date: Sun, 2 Mar 2014 18:34:06 +0800
- Subject: Re: [PATCH v4] PR middle-end/60281
- Authentication-results: sourceware.org; auth=none
- References: <DUB129-W70398F7180A2386B725257E4820 at phx dot gbl> <53104188 dot 2040303 at gmail dot com> <53106F83 dot 30108 at gmail dot com> <DUB129-W7567CB53370333209B55B6E48D0 at phx dot gbl> <20140302022451 dot GA7068 at lin-desktop> <20140302025241 dot GA8527 at lin-desktop>
Hi Bernd,
I think about whether the best mode is so important to x86_64.There
is no mov r/m64,imm64 refering to Intel Software Developer's Manual
Volume 2A 3-505.imm32 is the biggest number.And asan clears stack
using imms.
And even if there is a mov r/m64,imm64 in the future.The gcc peephole
pass will do its job.These constant moves will get combined.
So Maybe the best mode is not so important.
--
Regards
lin zuojian