[all-commits] [llvm/llvm-project] 9239d3: [RISCV] Teach performCombineVMergeAndVOps to handl...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9239d3a3eaf278ecf36376760b21e49512de6ac6
      https://github.com/llvm/llvm-project/commit/9239d3a3eaf278ecf36376760b21e49512de6ac6
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-05-29 (Mon, 29 May 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/test/CodeGen/RISCV/rvv/vfwmacc-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwmsac-vp.ll

  Log Message:
  -----------
  [RISCV] Teach performCombineVMergeAndVOps to handle instructions FMA instructions.

Previously we only handled instructions with merge ops that were
also masked. This patch supports instructions with merge ops that
aren't masked, like FMA.

I'm only folding into a TU vmerge for now. Supporting TA vmerge
shouldn't be much more work, but we need to make sure we get the
policy operand for the result correct. And of course we need more
tests.

Reviewed By: fakepaper56, frasercrmck

Differential Revision: https://reviews.llvm.org/D151596