[PATCH] D37348: Tighten conditions for converting ISD::CTTZ_ZERO_UNDEF to ISD::CTTZ

[Wei Ding via Phabricator via llvm-commits]

wdng added a comment.

If we don't want to change the original way of implementation, we may want to do a custom lowering for ISD::CTTZ at AMDGPU backend to ISD::CTTZ_ZERO_UNDE?


Repository:
  rL LLVM

https://reviews.llvm.org/D37348