[PATCH] D108341: [WebAssembly] More convert_low and promote_low codegen

[Thomas Lively via Phabricator via llvm-commits]

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The convert_low and promote_low instructions can widen the lower two lanes of a
four-lane vector, but we were previously scalarizing patterns that widened lanes
besides the low two lanes. The commit adds a shuffle to move the widened lanes
into the low lane positions so the convert_low and promote_low instructions can
be used instead of scalarizing.

Depends on D108266 <https://reviews.llvm.org/D108266>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108341

Files:
  llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
  llvm/test/CodeGen/WebAssembly/simd-conversions.ll

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