[PATCH] D79588: [llvm][Support] Use std::atomic for llvm::call_once

[Eli Friedman via Phabricator via llvm-commits]

efriedma requested changes to this revision.
efriedma added a comment.
This revision now requires changes to proceed.

This code is basically untested; I'd rather not touch it until we eventually kill it off.  (See the definition of LLVM_THREADING_USE_STD_CALL_ONCE.)


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D79588/new/

https://reviews.llvm.org/D79588