The MSVC implementation of Release_Store states that it works "works w/o barrier for current Intel chips as of June 2005". It would be nice to also know that it works for newer chips. Filing this bug so someone who understands the code can take a look at it.
 

The MSVC implementation of Release_Store states that it works "works w/o barrier for current Intel chips as of June 2005" (https://cs.chromium.org/chromium/src/base/atomicops_internals_x86_msvc.h?l=154). It would be nice to also know that it works for newer chips. Filing this bug so someone who understands the code can take a look at it.