[all-commits] [llvm/llvm-project] aee21c: [RISCV] AddEdge between mask producer and user of ...

[Liao Chunyu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: aee21c368b41cd5f7765a31b9dbe77f2bffadd4e
      https://github.com/llvm/llvm-project/commit/aee21c368b41cd5f7765a31b9dbe77f2bffadd4e
  Author: Liao Chunyu <chunyu at iscas.ac.cn>
  Date:   2025-07-11 (Fri, 11 Jul 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVVectorMaskDAGMutation.cpp
    M llvm/test/CodeGen/RISCV/rvv/combine-reduce-add-to-vcpop.ll
    M llvm/test/CodeGen/RISCV/rvv/extractelt-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-i1.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-shuffle-deinterleave.ll
    M llvm/test/CodeGen/RISCV/rvv/vscale-vw-web-simplification.ll
    M llvm/test/CodeGen/RISCV/rvv/vselect-fp.ll

  Log Message:
  -----------
  [RISCV] AddEdge between mask producer and user of V0 (#146855)

If there are multiple masks producers followed by multiple
masked consumers, may a move(vmv* v0, vx) will be generated
to save mask.
By moving the mask's producer after the mask's use,
the spill can be eliminated, and the move can be removed.



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