Merge "Fix heap poisoning in UnsafeCASObject x86/x86-64 intrinsic." am: 68561a1ca6 am: 2b9fd6b182
am: cf7c369cdc

* commit 'cf7c369cdc6a9ef08e7446f85b433b17ece50b9b':
  Fix heap poisoning in UnsafeCASObject x86/x86-64 intrinsic.