[PATCH] D87465: [TargetLowering] Change SimplifyDemandedBits for XOR

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.
Herald added a subscriber: pengfei.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp:1367
+        // when all demanded bits of Y and Z are known to be different
+        if (Op0.getOpcode() == ISD::OR &&
+            DemandedBits.isSubsetOf(C->getAPIntValue() ^ C1->getAPIntValue()))
----------------
ISD::AND ?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D87465/new/

https://reviews.llvm.org/D87465