hg: jdk9/hs-comp/hotspot: 8159016: Over-unrolled loop is partially removed

[tobias.hartmann at oracle.com]

Changeset: b725de5c248a
Author:    thartmann
Date:      2016-06-27 10:10 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/b725de5c248a

8159016: Over-unrolled loop is partially removed
Summary: Prevent over-unrolling of loops by computing upper bound for trip count.
Reviewed-by: kvn

! src/share/vm/opto/loopTransform.cpp
! src/share/vm/opto/loopnode.hpp
! src/share/vm/opto/macro.cpp
+ test/compiler/loopopts/TestOverunrolling.java