hg: valhalla/valhalla: 8215110: [lworld]: Javac should not generate a null check anymore for checkcast target type being a value type

[srikanth.adayapalam at oracle.com]

Changeset: e986cdb5aa99
Author:    sadayapalam
Date:      2018-12-10 13:33 +0530
URL:       http://hg.openjdk.java.net/valhalla/valhalla/rev/e986cdb5aa99

8215110: [lworld]:  Javac should not generate a null check anymore for checkcast target type being a value type

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Lower.java
! test/langtools/tools/javac/valhalla/lworld-values/CastNullCheckTest.java