hg: jdk9/hs-comp/hotspot: 8085832: Optimize main and post loop out when pre loop is found empty

[roland.westrelin at oracle.com]

Changeset: 421989a11af8
Author:    roland
Date:      2015-05-12 14:26 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/421989a11af8

8085832: Optimize main and post loop out when pre loop is found empty
Summary: Eliminate main loop and post loop if pre loop becomes empty
Reviewed-by: kvn, mcberg

! src/share/vm/opto/loopTransform.cpp
! src/share/vm/opto/loopnode.hpp