hg: amber/amber: dont add local variable spots if they are DCE'ed by the compiler

[vicente.romero at oracle.com]

Changeset: 7bb7ac4f13d7
Author:    vromero
Date:      2018-09-05 10:45 -0700
URL:       http://hg.openjdk.java.net/amber/amber/rev/7bb7ac4f13d7

dont add local variable spots if they are DCE'ed by the compiler

! src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java
+ test/langtools/tools/javac/specialConstantFolding/NoLocalsMustBeReservedForDCEedVarsTest.java