hg: jdk9/dev/nashorn: 8048586: String concatenation with optimistic types is slow

[hannes.wallnoefer at oracle.com]

Changeset: 6d8005c341ee
Author:    hannesw
Date:      2014-06-30 17:31 +0200
URL:       http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/6d8005c341ee

8048586: String concatenation with optimistic types is slow
Reviewed-by: lagergren, attila

! src/jdk/nashorn/internal/codegen/LocalVariableTypesCalculator.java
! src/jdk/nashorn/internal/codegen/types/ObjectType.java
! src/jdk/nashorn/internal/codegen/types/Type.java
! src/jdk/nashorn/internal/runtime/JSType.java
+ test/script/basic/JDK-8048586.js