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Re: 0004-Set-pseudos-only-once.patch

From: Jeff Law <law at redhat dot com>
To: Maxim Kuvyrkov <maxim at codesourcery dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Mon, 21 Jun 2010 11:55:11 -0600
Subject: Re: 0004-Set-pseudos-only-once.patch
References: <4C18F225.2040509@codesourcery.com> <4C18F46C.6090809@codesourcery.com>

On 06/16/10 09:57, Maxim Kuvyrkov wrote:

IRA and reload has special relationship with pseudos that are set only once. When such pseudos initialized with constants or instances that can be considered constant across the function, reload can rematerialize them instead of spilling or apply other optimizations.

This patch makes sure that we don't unnecessarily set same pseudo more than once.

OK to apply?

OK.  THanks,
Jeff

Follow-Ups:
- Re: 0004-Set-pseudos-only-once.patch
  - From: Maxim Kuvyrkov

References:
- Improvements to code hoisting
  - From: Maxim Kuvyrkov
- 0004-Set-pseudos-only-once.patch
  - From: Maxim Kuvyrkov

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