[all-commits] [llvm/llvm-project] 362644: [RISCV] Use X0 for VLMax for slide1up/slide1down i...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 36264435071ecb5790d7944f0653c8195033135f
      https://github.com/llvm/llvm-project/commit/36264435071ecb5790d7944f0653c8195033135f
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-07-31 (Wed, 31 Jul 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/vslide1down-constant-vl-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vslide1up-constant-vl-rv32.ll

  Log Message:
  -----------
  [RISCV] Use X0 for VLMax for slide1up/slide1down in lowerVectorIntrinsicScalars. (#101384)

Previously, we created a vsetvlimax intrinsic. Using X0 simplifies the
code and enables some optimizations to kick when the exact value of
vlmax is known.



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