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

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: LuoYuanke, spatel, pengfei, craig.topper.
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Add shl/srl/sra to the list of ops that we canonicalize with a select to expose an identity merge


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D122070

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/X86/vector-bo-select.ll

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