commit cf990751e215694a6df9566fff1b436825ce6f45
author Marshall Clow <mclow.lists@gmail.com> Wed Apr 25 14:27:29 2018 +0000
committer Marshall Clow <mclow.lists@gmail.com> Wed Apr 25 14:27:29 2018 +0000
tree 99c83a1ffe0a40619b09cd97835f4ee9ef55b42e
parent 3ce107883160fb6b98faa6d0035c0f828b8bae9c

Fix static initialization of std::atomic_flag; Fixes PR#37226. Thanks to Ricky Zhou for the report and test case.

llvm-svn: 330828
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 3df56fdd9b2089eea98eadf5730a86b26aa8cc76

include/atomic

diff --git a/include/atomic b/include/atomic
index f55e28f..34a2a58 100644
--- a/include/atomic
+++ b/include/atomic
@@ -1741,7 +1741,7 @@
     atomic_flag() _NOEXCEPT : __a_() {}
 #endif // _LIBCPP_CXX03_LANG
 
-    _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
     atomic_flag(bool __b) _NOEXCEPT : __a_(__b) {} // EXTENSION
 
 #ifndef _LIBCPP_CXX03_LANG