PR19878: If a pack expansion appears within another pack expansion, correctly
deduce any packs that are expanded by both expansions.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209786 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Hoist blacklisting globals from init-order checking to Clang.

Clang knows about the sanitizer blacklist and it makes no sense to
add global to the list of llvm.asan.dynamically_initialized_globals if it
will be blacklisted in the instrumentation pass anyway. Instead, we should
do as much blacklisting as possible (if not all) in the frontend.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209789 91177308-0d34-0410-b5e6-96231b3b80d8