[PATCH] D140916: [WebAssembly] Explicitly add {z, s}ext so extends are selected

[Luke Lau via Phabricator via llvm-commits]

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During DAG legalization, {u,s}itofp instructions on v2i8, v2i16, v4i8
and v4i16 types ended up being legalized into scalar instructions, when
they could just be extended to v2i32/v4i32 instead.

Fixes https://github.com/llvm/llvm-project/issues/57182


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140916

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

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