[PATCH] D102521: [RISCV] Optimize SEW=64 shifts by splat on RV32.

[Fraser Cormack via Phabricator via llvm-commits]

frasercrmck added a comment.

I probably don't have the full picture here, but I was wondering if there was a generic "simplify demanded bits" we could hook this node into, since presumably LLVM already knows that only those bits of the shift are used. Does `SimplifyDemandedBitsForTargetNode` not apply here?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D102521/new/

https://reviews.llvm.org/D102521