Added block type introspection support.

As per Fariborz's suggestion, committed now but can be reverted later if the used flag is problematic for Apple.

llvm-svn: 89134
8 files changed
tree: 29e52e9d6c6da3b6ccb4cc6d684c0dd2239e7221
  1. clang/
  2. compiler-rt/
  3. llvm/