[all-commits] [llvm/llvm-project] a4eb7e: [WebAssembly] Lower fmuladd to madd and nmadd (#16...

[Sam Parker via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4eb7ea22575afa40d79475c15fc2d0ad3f4498a
      https://github.com/llvm/llvm-project/commit/a4eb7ea22575afa40d79475c15fc2d0ad3f4498a
  Author: Sam Parker <sam.parker at arm.com>
  Date:   2025-10-13 (Mon, 13 Oct 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/ISDOpcodes.h
    M llvm/include/llvm/Target/TargetSelectionDAG.td
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/CodeGen/TargetLoweringBase.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.h
    M llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td
    M llvm/test/CodeGen/WebAssembly/simd-relaxed-fma.ll
    M llvm/test/CodeGen/WebAssembly/simd-relaxed-fnma.ll
    M llvm/test/MC/WebAssembly/simd-encodings.s

  Log Message:
  -----------
  [WebAssembly] Lower fmuladd to madd and nmadd (#161355)

Lower v4f32 and v2f64 fmuladd calls to relaxed_madd instructions.
If we have FP16, then lower v8f16 fmuladds to FMA.

I've introduced an ISD node for fmuladd to maintain the rounding
ambiguity through legalization / combine / isel.



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