{"head":"a8788d5c3e38ac074fcbd9dd1506f864f2e4f981","size":1,"push_id":46506241,"ref":"refs/heads/master","commits":[{"sha":"a8788d5c3e38ac074fcbd9dd1506f864f2e4f981","author":{"name":"Dan Gohman","email":"7b931280ccd22e16e383adbb3f0ada3ae1dc6318@apple.com"},"url":"https://api.github.com/repos/chapuni/llvm-project/commits/a8788d5c3e38ac074fcbd9dd1506f864f2e4f981","message":"Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata\ntag on objc_retainBlock calls, which indicates that they may be\noptimized away. rdar://10211286."}],"legacy":{"head":"a8788d5c3e38ac074fcbd9dd1506f864f2e4f981","size":1,"push_id":46506241,"shas":[["a8788d5c3e38ac074fcbd9dd1506f864f2e4f981","gohman@apple.com","Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata\ntag on objc_retainBlock calls, which indicates that they may be\noptimized away. rdar://10211286.","Dan Gohman"]],"ref":"refs/heads/master"}}