[PATCH] D53784: [DAGCombiner] narrow vector binops when extraction is cheap

[Steven Johnson via Phabricator via llvm-commits]

steven-johnson added a comment.

This change appears to have injected a regression into Halide -- as of this change, we are no longer correctly generating psubusb/psubusw instructions in Halide-generated code.


Repository:
  rL LLVM

https://reviews.llvm.org/D53784