[all-commits] [llvm/llvm-project] 109e4a: [RISCV] Handle zeroinitializer of vector tuple Typ...

[Brandon Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 109e4a147faa80aa0ef4da92da203dd6732ee415
      https://github.com/llvm/llvm-project/commit/109e4a147faa80aa0ef4da92da203dd6732ee415
  Author: Brandon Wu <brandon.wu at sifive.com>
  Date:   2024-12-04 (Wed, 04 Dec 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/IR/Type.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    A llvm/test/CodeGen/RISCV/vector-tuple-zeroinitializer.ll

  Log Message:
  -----------
  [RISCV] Handle zeroinitializer of vector tuple Type (#113995)

It doesn't make sense to add a new generic ISD to handle riscv tuple
type. Instead we use `SPLAT_VECTOR` for ISD and further lower to
`VMV_V_X`.

Note: If there's `visitSPLAT_VECTOR` in generic DAG combiner, it needs
to skip riscv vector tuple type.

Stack on https://github.com/llvm/llvm-project/pull/114329



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