[all-commits] [llvm/llvm-project] 80889a: [RISCV] Remove RISCVISD::VSELECT_VL. (#76866)

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 80889ae0297453476f600d6a8cf776f272dac461
      https://github.com/llvm/llvm-project/commit/80889ae0297453476f600d6a8cf776f272dac461
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-01-03 (Wed, 03 Jan 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td

  Log Message:
  -----------
  [RISCV] Remove RISCVISD::VSELECT_VL. (#76866)

We can use RISCVISD::VMERGE_VL with an undef passthru operand.

I had to rewrite the FMA patterns to handle both undef and non-undef
cases so we can get the tail policy.