[PATCH] D137511: [PPC] Undefine __ppc64__ to match GCC

[Daniel Kolesa via Phabricator via cfe-commits]

q66 added a comment.

The `__ppc__` macro should get the same treatment. That said, I believe there are instances of both macros being used across the LLVM codebase, and those cases are valid, so that should also be updated (one instance i know of is the limits header of libcxx, there are likely more)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137511/new/

https://reviews.llvm.org/D137511