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[RFC] Variable Expansion Optimization

From: Revital Eres <ERES at il dot ibm dot com>
To: gcc at gcc dot gnu dot org
Cc: Ayal Zaks <ZAKS at il dot ibm dot com>, Mircea Namolaru <NAMOLARU at il dot ibm dot com>, rakdver at atrey dot karlin dot mff dot cuni dot cz
Date: Sun, 22 Aug 2004 18:44:12 +0300
Subject: [RFC] Variable Expansion Optimization

Hello,

This patch implements the variable expansion optimization 
in the unroller as was described in 
http://gcc.gnu.org/ml/gcc/2004-08/msg00658.html.
It is missing the check for register pressure which is going to
be the next step.

The code contains the patch for splitting induction variables 
in unroller because it is not in mainline yet.
(http://gcc.gnu.org/ml/gcc-patches/2004-08/msg00397.html)
I also made some changes to it in 
order to support the variable expansion optimization.

Comments are welcome.

Thanks,
Revital

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