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Re: gcc 4.1.1 poor optimization

From: Greg Smith <gsmith at nc dot rr dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Wed, 17 Jan 2007 23:26:03 -0500
Subject: Re: gcc 4.1.1 poor optimization
References: <1168471038.9980.31.camel@localhost.localdomain> <m3tzyyxxwf.fsf@dhcp-172-18-118-195.corp.google.com> <1169092866.1657.72.camel@localhost.localdomain>

>         movl    %edx, 56(%esp)
>         movl    36(%ebp), %eax
>         andl    %edi, %eax
>         movl    %eax, 60(%esp)
>         movb    $4, 42(%ebp)
>         movl    56(%esp), %edi
>         testl   $3, %edi 

Oh, here's one I missed.  %edx is stored into 56(%esp) then %edi is
loaded from 56(%esp) for the testl but %edx is still unchanged.

Greg Smith

References:
- gcc 4.1.1 poor optimization
  - From: Greg Smith
- Re: gcc 4.1.1 poor optimization
  - From: Ian Lance Taylor
- Re: gcc 4.1.1 poor optimization
  - From: Greg Smith

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