hg: jdk8u/jdk8u-dev/hotspot: 8172850: Anti-dependency on membar causes crash in register allocator due to invalid instruction scheduling

[rwestrel at redhat.com]

Changeset: e044997c2eda
Author:    thartmann
Date:      2018-10-15 11:00 +0200
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/e044997c2eda

8172850: Anti-dependency on membar causes crash in register allocator due to invalid instruction scheduling
Summary: Regression test and additional asserts. The problem is fixed by 8087341.
Reviewed-by: kvn

! src/share/vm/opto/cfgnode.cpp
! src/share/vm/opto/coalesce.cpp
! src/share/vm/opto/machnode.cpp
! src/share/vm/opto/matcher.cpp
+ test/compiler/gcbarriers/TestMembarDependencies.java