[all-commits] [llvm/llvm-project] 68152f: [WebAssembly] v16i8 mul support (#150209)

[Sam Parker via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 68152f1301cd7196377f62c1e58e9a67cfa833f1
      https://github.com/llvm/llvm-project/commit/68152f1301cd7196377f62c1e58e9a67cfa833f1
  Author: Sam Parker <sam.parker at arm.com>
  Date:   2025-07-29 (Tue, 29 Jul 2025)

  Changed paths:
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
    M llvm/test/CodeGen/WebAssembly/simd-arith.ll
    M llvm/test/CodeGen/WebAssembly/vector-reduce.ll

  Log Message:
  -----------
  [WebAssembly] v16i8 mul support (#150209)

During target DAG combine, use two i16x8.extmul_low_i8x16 and a shuffle
for v16i8 mul.

On my AArch64 machine, using V8, I observe a 3.14% geomean improvement
across 65 benchmarks, including: 9.2% for spec2017.x264, 6% for libyuv
and 1.8% for ncnn.



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