hg: jdk8u/jdk8u-dev/hotspot: 8175887: C1 value numbering handling of Unsafe.get*Volatile is incorrect

[vladimir.x.ivanov at oracle.com]

Changeset: 0e53cdb9fc2a
Author:    shade
Date:      2017-03-08 14:22 +0100
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/0e53cdb9fc2a

8175887: C1 value numbering handling of Unsafe.get*Volatile is incorrect
Reviewed-by: vlivanov

! src/share/vm/c1/c1_ValueMap.hpp
+ test/compiler/c1/UnsafeVolatileGuardTest.java
+ test/compiler/c1/VolatileGuardTest.java