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Re: [PATCH] PR opt/3995: Optimize (A&C)!=0 into A<0 (take 2)

From: Richard Henderson <rth at redhat dot com>
To: Roger Sayle <roger at eyesopen dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Sun, 5 May 2002 14:43:56 -0700
Subject: Re: [PATCH] PR opt/3995: Optimize (A&C)!=0 into A<0 (take 2)
References: <20020505140732.F12699@redhat.com> <Pine.LNX.4.33.0205051511480.7868-100000@www.eyesopen.com>

On Sun, May 05, 2002 at 03:20:33PM -0600, Roger Sayle wrote:
> Even if A is a zero-extension from unsigned char to unsigned int, we
> can still use a signed char comparison against 0x80.

Ah yes, I see what you've done now.  Patch ok.


r~

References:
- Re: [PATCH] PR opt/3995: Optimize (A&C)!=0 into A<0 (take 2)
  - From: Richard Henderson
- Re: [PATCH] PR opt/3995: Optimize (A&C)!=0 into A<0 (take 2)
  - From: Roger Sayle

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