hg: jdk/sandbox: 8218966: AArch64: String.compareTo() can read memory after string

[chris.hegarty at oracle.com]

Changeset: 82fd8793ba5e
Author:    dpochepk
Date:      2019-05-22 20:39 +0300
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/82fd8793ba5e

8218966: AArch64: String.compareTo() can read memory after string
Reviewed-by: dsamersoff

! src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp
+ test/hotspot/jtreg/compiler/intrinsics/string/TestStringCompareToDifferentLength.java
+ test/hotspot/jtreg/compiler/intrinsics/string/TestStringCompareToSameLength.java