From f3011455a206d0b4e6f412fb6fb3ccca64d45b69 Mon Sep 17 00:00:00 2001
From: Tobias Hartmann <thartmann@openjdk.org>
Date: Thu, 5 Nov 2015 15:29:46 +0100
Subject: [PATCH] 8141443: jdk/test/java/util/regex/RegExTest.java fails: No
 match found

Do not sign extend when converting jbyte to jchar.

Reviewed-by: shade, kvn
---
 hotspot/src/share/vm/opto/stringopts.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hotspot/src/share/vm/opto/stringopts.cpp b/hotspot/src/share/vm/opto/stringopts.cpp
index f91b4b63b29..b11742f04b3 100644
--- a/hotspot/src/share/vm/opto/stringopts.cpp
+++ b/hotspot/src/share/vm/opto/stringopts.cpp
@@ -1520,7 +1520,7 @@ void PhaseStringOpts::copy_constant_string(GraphKit& kit, IdealKit& ideal, ciTyp
       Node* adr = kit.array_element_address(dst_array, index, T_BYTE);
       jchar val;
       if (src_is_byte) {
-        val = src_array->byte_at(i);
+        val = src_array->byte_at(i) & 0xff;
       } else {
         val = readChar(src_array, i++);
       }