[PATCH] D105600: [WebAssembly] Optimize out shift masks

[Thomas Lively via Phabricator via llvm-commits]

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WebAssembly's shift instructions implicitly masks the shift count, so optimize
out redundant explicit masks of the shift count. For vector shifts, this
currently only works if the mask is applied before splatting the shift count,
but this should be addressed in a future commit. Resolves PR49655.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D105600

Files:
  llvm/lib/Target/WebAssembly/WebAssemblyInstrInteger.td
  llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td
  llvm/test/CodeGen/WebAssembly/masked-shifts.ll

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