[PATCH] D139871: [WebAssembly] Replace LOAD_SPLAT with SPLAT_VECTOR

[Luke Lau via Phabricator via llvm-commits]

luke created this revision.
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Splats were selected by matching on uses of `build_vector` with
identical elements, but a while back a target independent node for
vector splatting was added.
This removes the WebAssembly specific LOAD_SPLAT intrinsic, and instead
makes SPLAT_VECTOR legal and adds patterns for splat loads.

It also has the effect of replacing splatted vector constants with a
scalar constant and a splat, which should save on code size.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139871

Files:
  llvm/lib/Target/WebAssembly/WebAssemblyISD.def
  llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
  llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td
  llvm/test/CodeGen/WebAssembly/fpclamptosat_vec.ll
  llvm/test/CodeGen/WebAssembly/masked-shifts.ll
  llvm/test/CodeGen/WebAssembly/simd-arith.ll
  llvm/test/CodeGen/WebAssembly/simd-build-vector.ll
  llvm/test/CodeGen/WebAssembly/simd-conversions.ll
  llvm/test/CodeGen/WebAssembly/simd-load-splat.ll
  llvm/test/CodeGen/WebAssembly/simd-offset.ll
  llvm/test/CodeGen/WebAssembly/simd-pr51605.ll
  llvm/test/CodeGen/WebAssembly/simd-shift-complex-splats.ll
  llvm/test/CodeGen/WebAssembly/simd-vector-trunc.ll
  llvm/test/CodeGen/WebAssembly/simd.ll

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