hg: jdk9/hs-comp/hotspot: 8048879: "unexpected yanked node" opto/postaloc.cpp:139

[albert.noll at oracle.com]

Changeset: 7c8d05c88072
Author:    thartmann
Date:      2014-08-19 07:36 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/7c8d05c88072

8048879: "unexpected yanked node" opto/postaloc.cpp:139
Summary: MemBarAcquireNode prevents deletion of dead LoadNNode. Added condition to 'has_special_unique_user' to trigger deletion.
Reviewed-by: kvn, iveresov

! src/share/vm/opto/node.cpp
+ test/compiler/membars/TestMemBarAcquire.java