[PATCH] D151263: [RISCV] Expand rotate by non-constant for XTHeadBb during lowering.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: philipp.tomsich, JojoR.
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Avoids multi instruction isel patterns and enables mask optimizations
on shift amount.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151263

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfoXTHead.td
  llvm/test/CodeGen/RISCV/rotl-rotr.ll

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