hg: jdk/sandbox: 8212597: Optimize String concatenation setup when using primitive operands

[chris.hegarty at oracle.com]

Changeset: 430e6421d503
Author:    redestad
Date:      2018-10-17 17:35 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/430e6421d503

8212597: Optimize String concatenation setup when using primitive operands
Reviewed-by: shade

! make/jdk/src/classes/build/tools/classlist/HelloClasslist.java
! src/java.base/share/classes/java/lang/StringConcatHelper.java
! src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java