[PATCH] D122070: [SDAG] enable binop identity constant folds for shifts

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:2167
+      case ISD::SRA: // X s>> 0 --> X
+      case ISD::SRL: // X u>> 0 --> X
         return C->isZero();
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Can it apply to ROTL/ROTR ?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D122070/new/

https://reviews.llvm.org/D122070