8156068: Unsafe.{get|set}Opaque should be single copy atomic

Reviewed-by: psandoz, vlivanov
2016-05-06 15:41:15 +03:00 · 2016-05-06 15:41:15 +03:00 · b3f1f110f4
commit b3f1f110f4
parent 107de3478c
1 changed files with 2 additions and 1 deletions
--- a/hotspot/src/share/vm/opto/library_call.cpp
+++ b/hotspot/src/share/vm/opto/library_call.cpp
@ -2472,9 +2472,10 @@ bool LibraryCallKit::inline_unsafe_access(const bool is_native_ptr, bool is_stor
  bool requires_atomic_access = false;
  switch (kind) {
      case Relaxed:
-      case Opaque:
          requires_atomic_access = AlwaysAtomicAccesses;
          break;
+      case Opaque:
+          // Opaque accesses are atomic.
      case Acquire:
      case Release:
      case Volatile: