Merge "Fix heap poisoning in UnsafeCASObject x86/x86-64 intrinsic." am: 68561a1ca6
am: 2b9fd6b182

* commit '2b9fd6b182febfc3f2fe348e96e043e9915b7c74':
  Fix heap poisoning in UnsafeCASObject x86/x86-64 intrinsic.