Thread safety analysis: make sure that expressions in attributes are parsed
in an unevaluated context.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174644 91177308-0d34-0410-b5e6-96231b3b80d8
Rename -fmodule-cache-path <blah> to -fmodules-cache-path=<blah> for consistency.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174645 91177308-0d34-0410-b5e6-96231b3b80d8
libclang: reduce CXString abuse

ContainerUSR is not really a CXString, but it should own the underlying memory
buffer.  Thus, it is better to change the type to std::string.  This will not
introduce extra copying overhead, since the workaround that is being removed
was already making a copy.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174647 91177308-0d34-0410-b5e6-96231b3b80d8
Retain all hidden methods in the global method pool, because they may become visible <rdar://problem/13172858>.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174648 91177308-0d34-0410-b5e6-96231b3b80d8
Add missing header from r174648

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174649 91177308-0d34-0410-b5e6-96231b3b80d8