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Re: Can register rename pass rename a callee-saved register?

From: Ian Lance Taylor <iant at google dot com>
To: "Mohamed Shafi" <shafitvm at gmail dot com>
Cc: GCC <gcc at gcc dot gnu dot org>
Date: Thu, 19 Jun 2008 07:56:08 -0700
Subject: Re: Can register rename pass rename a callee-saved register?
References: <ba0bd44d0806190216j3bb01651x1023d20069b1bb9b@mail.gmail.com> <m3bq1xwp63.fsf@google.com> <ba0bd44d0806190619i4cdfe26epd634d99d83092f68@mail.gmail.com>

"Mohamed Shafi" <shafitvm@gmail.com> writes:

>> Which version of gcc?  I was under the impression that this
>> longstanding buglet was cleaned up by the dataflow work.
>>
>
>    I am doing a port in gcc 4.1.2. The register is actually replaced
> by register copy-propagation optimization pass.

I believe that in gcc 4.3 this unnecessary store and load should no
longer happen.

Ian

Follow-Ups:
- Re: Can register rename pass rename a callee-saved register?
  - From: Mohamed Shafi

References:
- Can register rename pass rename a callee-saved register?
  - From: Mohamed Shafi
- Re: Can register rename pass rename a callee-saved register?
  - From: Ian Lance Taylor
- Re: Can register rename pass rename a callee-saved register?
  - From: Mohamed Shafi

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