[PATCH] D59174: [DAGCombine][AArch64] Fold (x & ~y) | y patterns

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

These seem to be managing special cases of the bit select pattern OR(AND(X,Y),AND(Z,~Y)) - would we benefit from adding a helper function to detect these, similar to what we have for isBitwiseNot ? Although in this case we'd have to generate the -1 constant.


Repository:
  rL LLVM

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  https://reviews.llvm.org/D59174/new/

https://reviews.llvm.org/D59174