8279560: AArch64: generate_compare_long_string_same_encoding and LARG…

…E_LOOP_PREFETCH alignment

Co-authored-by: Wang Huang <whuang@openjdk.org>
Reviewed-by: shade, aph

src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2014, 2021, Red Hat Inc. All rights reserved.
+ * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2022, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -5337,11 +5337,11 @@ class StubGenerator: public StubCodeGenerator {
     __ add(str1, str1, wordSize);
     __ add(str2, str2, wordSize);
     if (SoftwarePrefetchHintDistance >= 0) {
+      __ align(OptoLoopAlignment);
       __ bind(LARGE_LOOP_PREFETCH);
         __ prfm(Address(str1, SoftwarePrefetchHintDistance));
         __ prfm(Address(str2, SoftwarePrefetchHintDistance));
 
-        __ align(OptoLoopAlignment);
         for (int i = 0; i < 4; i++) {
           __ ldp(tmp1, tmp1h, Address(str1, i * 16));
           __ ldp(tmp2, tmp2h, Address(str2, i * 16));