[all-commits] [llvm/llvm-project] 388907: [RISCV] Don't process scalar instructions in VLOpt...

[Luke Lau via All-commits]

  Branch: refs/heads/users/lukel97/riscv/vl-opt-skip-novec-instrs
  Home:   https://github.com/llvm/llvm-project
  Commit: 3889079341fd084f92a636d7df8e2c08bba81e3b
      https://github.com/llvm/llvm-project/commit/3889079341fd084f92a636d7df8e2c08bba81e3b
  Author: Luke Lau <luke at igalia.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp

  Log Message:
  -----------
  [RISCV] Don't process scalar instructions in VLOptimizer. NFC

If an instruction doesn't define or use a vector register it won't
take part in the dataflow analysis. Skipping these improves compile
time. Measured to reduce geomean −0.379% instructions retired on
CTMark w/ a stage2 rva23u64 -O3 Clang build.



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