After much consultation aimed at figuring out what this builtin actually
does, document the results and then implement __builtin_extend_pointer for
platforms where it's a no-op.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97540 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed