[PATCH] D133473: [WebAssembly] Improve codegen for shuffles with undefined lane indices

[Fanchen Kong via Phabricator via llvm-commits]

fanchenkong1 created this revision.
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For undefined lane indices, fill the mask with {0..N} instead of zeros, to allow further reduction to word/dword shuffle at VM.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133473

Files:
  llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
  llvm/test/CodeGen/WebAssembly/fpclamptosat_vec.ll
  llvm/test/CodeGen/WebAssembly/simd-build-vector.ll
  llvm/test/CodeGen/WebAssembly/simd-concat.ll
  llvm/test/CodeGen/WebAssembly/simd-conversions.ll
  llvm/test/CodeGen/WebAssembly/simd-extending.ll
  llvm/test/CodeGen/WebAssembly/simd.ll

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