[PATCH] D75917: Expose llvm fence instruction as clang intrinsic

[Brian Sumner via Phabricator via cfe-commits]

b-sumner added a comment.

In addition to predefining `__ATOMIC_RELAXED`, etc., clang also predefines `__OPENCL_MEMORY_SCOPE_WORK_ITEM` and friends.  So it doesn't really seem unreasonable for clang to also predefine its known syncscopes, and to require the argument to be one of those integers.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D75917/new/

https://reviews.llvm.org/D75917