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Re: [PATCH] PR middle-end/18293: Fast-path expand_mult for 2^N

From: Mike Stump <mrs at apple dot com>
To: Ian Lance Taylor <ian at wasabisystems dot com>
Cc: Roger Sayle <roger at eyesopen dot com>, Zack Weinberg <zack at codesourcery dot com>, gcc-patches at gcc dot gnu dot org
Date: Wed, 8 Dec 2004 10:39:24 -0800
Subject: Re: [PATCH] PR middle-end/18293: Fast-path expand_mult for 2^N

On Wednesday, December 8, 2004, at 10:33 AM, Ian Lance Taylor wrote:

An interesting idea, and dead easy to implement 80% of it.  Try
replacing the .c.o rule in gcc/Makefile.in with this.  This is
untested, and I think it should only be enabled with some configure
switch.

Well, if you're going to all that effort to do it, I'll have to test it out and collect some numbers.

Originally I want thinking just doing this for files that had tm.h in the dependancy chain, as I know those hurt the most.

Thanks.

References:
- Re: [PATCH] PR middle-end/18293: Fast-path expand_mult for 2^N
  - From: Ian Lance Taylor

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