[PATCH] D157598: [InstCombine] Transform sub(sext(add(X, Y)), sext(add(X, Z))) to sub(Y, Z) given nsw adds

[Dave Green via Phabricator via llvm-commits]

dmgreen updated this revision to Diff 551909.
dmgreen marked 5 inline comments as done.
dmgreen added a comment.

Thanks for the review. Updated for one use checks and commutivity. This might start to get stranger in a followup but this part should hopefully be sensible enough on it's own.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D157598/new/

https://reviews.llvm.org/D157598

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
  llvm/test/Transforms/InstCombine/sub-ext-add.ll

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