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Re: Patch: hoist more loop invariants

From: Dale Johannesen <dalej at apple dot com>
To: Andreas Jaeger <aj at suse dot de>
Cc: Dale Johannesen <dalej at apple dot com>, Richard Henderson <rth at redhat dot com>, gcc-patches at gcc dot gnu dot org
Date: Fri, 28 Feb 2003 10:29:28 -0800
Subject: Re: Patch: hoist more loop invariants

On Thursday, February 27, 2003, at 11:48 PM, Andreas Jaeger wrote:

Dale Johannesen <dalej at apple dot com> writes:
On Thursday, February 27, 2003, at 05:48 PM, Richard Henderson wrote:
On Wed, Feb 26, 2003 at 05:32:34PM -0800, Dale Johannesen wrote:
This is about a 2% win on SPECint (ppc Darwin).
Bootstrapped and tested on Darwin.
Seems ok. Do you have a notion of where it helped the most?
It was fairly pervasive, with eon and twolf being the biggest
individual winners.
It did not make any Specmark worse.
I get other results on GCC CVS mainline with:
                                   HARDWARE
                                   --------
     Hardware Vendor: AMD
          Model Name: Athlon 1.133 Ghz Box
                 CPU: AMD Athlon(tm) Processor

I'm not surprised this doesn't affect x86 much, that machine doesn't have any registers and is probably already pulling the max number of invariants out of loops in most places.

References:
- Re: Patch: hoist more loop invariants
  - From: Andreas Jaeger

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