[PATCH] D52075: [InstCombine] Support (sub (sext x), (sext y)) --> (sext (sub x, y)) and (sub (zext x), (zext y)) --> (zext (sub x, y))

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 165637.
craig.topper added a comment.

Rebase to use the code from r342292.


Repository:
  rL LLVM

https://reviews.llvm.org/D52075

Files:
  lib/Transforms/InstCombine/InstCombineAddSub.cpp
  lib/Transforms/InstCombine/InstructionCombining.cpp
  test/Transforms/InstCombine/narrow-math.ll

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