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[new-ra] PATCH: Improved Register Rematerialization

From: "Mukta Punjani, Noida" <muktap at noida dot hcltech dot com>
To: "'gcc-patches at gcc dot gnu dot org'" <gcc-patches at gcc dot gnu dot org>
Cc: "'Michael Matz'" <matz at suse dot de>, Denis Chertykov <denisc at overta dot ru>
Date: Tue, 23 Dec 2003 16:21:07 +0530
Subject: [new-ra] PATCH: Improved Register Rematerialization

Hi,

The patch improves improves the Register Rematerialization handling in
new-regalloc-branch. My previous postings discuss the ideas.

http://gcc.gnu.org/ml/gcc/2003-06/msg02479.html

The comments in file ra-rewrite.c document the envisaged optimization and
implementation details. The code can be enabled by a -fimproved-remat
compile time flag.

Please have a look at the patch.

On SH, the code size improvements have been in the range of 1-8 % with a
maximum of 8.1 % for stress1.17/L3bitstream.i
The execution performance is a maximum of 5% for GSM Compression and GZIP
Compression.

The changes have been bootstrapped on i386.

Please find the patch attached.

Best Regards,
Mukta

Attachment: patch.txt
Description: Text document

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