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[PATCH] Variable Expansion in unroller + Register Pressure Utility

From: Revital Eres <ERES at il dot ibm dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: mark at codesourcery dot com, Steven Bosscher <stevenb at suse dot de>, Ayal Zaks <ZAKS at il dot ibm dot com>, vmakarov at redhat dot com, Mircea Namolaru <NAMOLARU at il dot ibm dot com>, rakdver at atrey dot karlin dot mff dot cuni dot cz
Date: Mon, 20 Sep 2004 21:57:06 +0300
Subject: [PATCH] Variable Expansion in unroller + Register Pressure Utility

Hello,

Attached is the patch with the changes I was asked to make.

The testing so far on POWER4 showed no significant 
improvement on SPECINT.
On SPECFP I noticed an improvement of ~2.6% on art benchmark 
when running with POWER4 flags.
On i686 the patch showed no significant improvement
on both SPECINT and SPECFP.

The optimization is currently enabled 
with -fvariable-expansion-in-unroller flag.

Bootstrapped (with -funroll-all-loops) & regression tests on POWER4.
(I would also like to report that in the last two days (20-19/9/04)
I received gnucompare error when bootstraping
mainline with -O2 -funroll-all-loops options on both i686 and POWER4.)

Thanks,
Revital

Attachment: new_diff_20_9
Description: Binary data

Attachment: Change_log_20_9
Description: Binary data

Follow-Ups:
- Re: [PATCH] Variable Expansion in unroller + Register Pressure Utility
  - From: Steven Bosscher

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