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Re: [PATCH] Canonicalize compares in combine [2/3] Modifications to try_combine()

From: Paolo Bonzini <bonzini at gnu dot org>
To: Chung-Lin Tang <cltang at codesourcery dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Fri, 06 May 2011 11:57:03 +0200
Subject: Re: [PATCH] Canonicalize compares in combine [2/3] Modifications to try_combine()
References: <4DB19D03.8050606@codesourcery.com>

On 04/22/2011 05:21 PM, Chung-Lin Tang wrote:

Also, instead of testing for XEXP(SET_SRC(PATTERN(i3)),1) == const0_rtx
at the top, it now allows CONST_INT_P(XEXP(SET_SRC(PATTERN(i3)),1)),
tries to adjust it by simplify_compare_const() from the last patch, and
then tests if op1 == const0_rtx. This is a small improvement in some cases.

I'm not sure why it doesn't allow both?

Paolo

Follow-Ups:
- Re: [PATCH] Canonicalize compares in combine [2/3] Modifications to try_combine()
  - From: Chung-Lin Tang
- Re: [PATCH] Canonicalize compares in combine [2/3] Modifications to try_combine()
  - From: Jeff Law

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