issue-451: Fixed incorrect assembly for 64-bit barrier load and store on windows platforms.
issue-451: Fixed incorrect assembly for 64-bit barrier load and store on windows platforms.

git-svn-id: 005a797486ed258bc647c92414185dac8898a8a0@181 6b5cf1ce-ec42-a296-1ba9-69fdba395a50

p-gperftools/gperftools,p-gperftools/gperftools,p-gperftools/gperftools,p-gperftools/gperftools