hg: valhalla/valhalla: 8214977: [lworld] checkcast should perform a null-check when its CP entry contains a Q-descriptor

[frederic.parain at oracle.com]

Changeset: efdd3044724d
Author:    fparain
Date:      2018-12-06 16:28 -0500
URL:       http://hg.openjdk.java.net/valhalla/valhalla/rev/efdd3044724d

8214977: [lworld] checkcast should perform a null-check when its CP entry contains a Q-descriptor

! src/hotspot/cpu/x86/templateTable_x86.cpp
! src/hotspot/share/classfile/classFileParser.cpp
! src/hotspot/share/oops/constantPool.cpp
! src/hotspot/share/oops/constantPool.hpp
! src/hotspot/share/utilities/constantTag.cpp
! src/hotspot/share/utilities/constantTag.hpp
+ test/hotspot/jtreg/runtime/valhalla/valuetypes/CheckcastTest.java