[PATCH] D108129: [DAGCombiner] Teach combineShiftToMULH to handle constant and const splat vector.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:8536
+    unsigned ActiveBits =
+        isConstOrConstSplat(ConstantOp)->getAPIntValue().getActiveBits();
+    if (ActiveBits > NarrowVTBits)
----------------
Why not reuse LeftConstant/RightConstant?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D108129/new/

https://reviews.llvm.org/D108129