[all-commits] [llvm/llvm-project] b02920: [RISCV] Don't increase vslide or splat vl if +vl-d...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b02920f36970264d7cbddbe2d432c2d3a8361f1a
      https://github.com/llvm/llvm-project/commit/b02920f36970264d7cbddbe2d432c2d3a8361f1a
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-07-09 (Wed, 09 Jul 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
    M llvm/test/CodeGen/RISCV/rvv/vector-splice.ll
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.ll

  Log Message:
  -----------
  [RISCV] Don't increase vslide or splat vl if +vl-dependent-latency is present (#147089)

If the subtarget's latency is dependent on vl, then we shouldn't try to
fold away vsetvli toggles if it means increasing vl.



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