[all-commits] [llvm/llvm-project] d10079: [RISCV] Reduce the VL of both operands in VMERGE_V...

[Min-Yih Hsu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d10079e305acae58b44dc773cb94f7127de197ef
      https://github.com/llvm/llvm-project/commit/d10079e305acae58b44dc773cb94f7127de197ef
  Author: Min-Yih Hsu <min.hsu at sifive.com>
  Date:   2025-06-18 (Wed, 18 Jun 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp
    M llvm/test/CodeGen/RISCV/rvv/masked-load-int.ll
    M llvm/test/CodeGen/RISCV/rvv/vl-opt-instrs.ll

  Log Message:
  -----------
  [RISCV] Reduce the VL of both operands in VMERGE_VVM (#144759)

The `tryToReduceVL` function in RISCVVectorPeephole currently only
reduces the VL of the instruction that defines the true operand in
VMERGE_VVM. We should be able to reduce VL of both operands. This patch
generalizes this function to support multiple operands from a single
instruction.



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