[PATCH] D23002: DAGCombiner: check isZExtFree before doing combine

[escha via llvm-commits]

escha added a comment.

Closing for now; it looks like this can interfere with address mode folding (e.g. on x86_64 where 32->64 zext is free), even though it makes logical sense.


Repository:
  rL LLVM

https://reviews.llvm.org/D23002