hg: jdk9/hs-comp/hotspot: 8072016: Array copy may cause infinite cycle of deoptimization/compilation

[roland.westrelin at oracle.com]

Changeset: e9291d20ecaa
Author:    roland
Date:      2015-02-09 15:10 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/e9291d20ecaa

8072016: Array copy may cause infinite cycle of deoptimization/compilation
Summary: Infinite deoptimization/recompilation cycles in case of arraycopy with tightly coupled allocation
Reviewed-by: kvn, vlivanov

! src/share/vm/opto/graphKit.cpp
! src/share/vm/opto/library_call.cpp
! test/compiler/arraycopy/TestArrayCopyNoInit.java
+ test/compiler/arraycopy/TestArrayCopyNoInitDeopt.java