[PATCH] D145143: [DAGCombiner] Add fold for `~x & x` -> `0`

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n marked an inline comment as done.
goldstein.w.n added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:6630
+    return Op0.getOpcode() == ISD::XOR && Op0.getOperand(0) == Op1 &&
+           isAllOnesOrAllOnesSplat(Op0.getOperand(1));
+  };
----------------
RKSimon wrote:
> Use isBitwiseNot / getBitwiseNotOperand ?
Made new helper that uses `isBitwiseNot`.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145143/new/

https://reviews.llvm.org/D145143