[PATCH] D42646: [X86] Avoid using high register trick for test instruction

[Philip Reames via Phabricator via llvm-commits]

reames added a comment.

Is it worth considering doing this as a late peephole?  (i.e. after register allocation if the register happens to be appropriate?)


Repository:
  rL LLVM

https://reviews.llvm.org/D42646