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[x86,PATCH] Simple fix for Atom LEA splitting.

From: Yuri Rumyantsev <ysrumyan at gmail dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, Uros Bizjak <ubizjak at gmail dot com>, Igor Zamyatin <izamyatin at gmail dot com>
Date: Mon, 16 Sep 2013 16:50:40 +0400
Subject: [x86,PATCH] Simple fix for Atom LEA splitting.
Authentication-results: sourceware.org; auth=none

Hi All,

Here is 1-line fix which improves Atom performance by better distance
estimation. We got ~20% speedup on one of bench from eembc2.0 with
this fix.

Bootstrapping and regression testing were successful for x86-64.

Is it OK for trunk?

ChangeLog:

2013-09-16  Yuri Rumyantsev  <ysrumyan@gmail.com>

* config/i386/i386.c (distance_agu_use_in_bb) : Proper initialization
of 'prev' var to get better distance estimation.

Attachment: patch
Description: Binary data

Follow-Ups:
- Re: [x86,PATCH] Simple fix for Atom LEA splitting.
  - From: Uros Bizjak

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