[all-commits] [llvm/llvm-project] 792101: [RISCV] Add test cases for missed opportunity to u...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 792101fff749191dfd4dadabe2ecd30a4d8cd973
      https://github.com/llvm/llvm-project/commit/792101fff749191dfd4dadabe2ecd30a4d8cd973
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-09-20 (Mon, 20 Sep 2021)

  Changed paths:
    M llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll

  Log Message:
  -----------
  [RISCV] Add test cases for missed opportunity to use vfmacc.vf. NFC

This is another case of a splat being in another basic block
preventing SelectionDAG from optimizing it.


  Commit: a95ba8107359e17cb1669c01f416fd2723a23126
      https://github.com/llvm/llvm-project/commit/a95ba8107359e17cb1669c01f416fd2723a23126
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-09-20 (Mon, 20 Sep 2021)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll

  Log Message:
  -----------
  [RISCV] Teach RISCVTargetLowering::shouldSinkOperands to sink splats for FMA.

If either of the multiplicands is a splat, we can sink it to use
vfmacc.vf or similar.


Compare: https://github.com/llvm/llvm-project/compare/d5db71d19f11...a95ba8107359