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

[Yuri Rumyantsev]

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  <ysrum...@gmail.com>

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

patch
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