[PATCH] D24280: [IndVarSimplify] Prefer sext over zext when widening IV if it is non-negative and has a GEP user

[Li Huang via llvm-commits]

lihuang added a comment.

InstCombine canonicalizes on zexts when the value is non-negative. I will try canonicalizing on zext and teach getWideRecurrence to return a valid AddRec when the non-negative value is zero-extended.


https://reviews.llvm.org/D24280