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Re: [PATCH] Optimize andl $0xffffffff, %eax

From: Adam Nemet <anemet at caviumnetworks dot com>
To: Richard Guenther <richard dot guenther at gmail dot com>
Cc: Jakub Jelinek <jakub at redhat dot com>, Uros Bizjak <ubizjak at gmail dot com>, Jan Hubicka <jh at suse dot cz>, Richard Henderson <rth at redhat dot com>, gcc-patches at gcc dot gnu dot org
Date: Thu, 21 May 2009 10:29:06 -0700
Subject: Re: [PATCH] Optimize andl $0xffffffff, %eax
References: <20090521131653.GL5781@tyan-ft48-01.lab.bos.redhat.com> <84fc9c000905210844o1051ddb4ga4fea640998a38f1@mail.gmail.com>

Richard Guenther <richard.guenther@gmail.com> writes:
> Hm, isn't that something simplify-rtx should do?  Transform
> (and:SI reg 0xfffff) to (zero-extend:SI (subreg ...))?

It should be more like make_compound_operation in combine.

Adam

References:
- [PATCH] Optimize andl $0xffffffff, %eax
  - From: Jakub Jelinek
- Re: [PATCH] Optimize andl $0xffffffff, %eax
  - From: Richard Guenther

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