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Akira Hatanaka
9bfe38a556
Don't add a tail keyword to calls to ObjC runtime functions if the calls
are annotated with notail. r356705 annotated calls to objc_retainAutoreleasedReturnValue with notail on x86-64. This commit teaches ARC optimizer to check the notail marker on the call before turning it into a tail call. rdar://problem/38675807 llvm-svn: 356707
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