[all-commits] [llvm/llvm-project] 0676c6: [RISCV] Support vector type strict_fma.

[Yeting Kuo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0676c6d91fef302e0ae17f1a4571f28b1be1b27c
      https://github.com/llvm/llvm-project/commit/0676c6d91fef302e0ae17f1a4571f28b1be1b27c
  Author: Yeting Kuo <yeting.kuo at sifive.com>
  Date:   2023-03-28 (Tue, 28 Mar 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
    M llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
    A llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfmadd-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfmsub-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfnmadd-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfnmsub-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/vfmadd-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/vfmsub-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/vfnmadd-constrained-sdnode.ll
    A llvm/test/CodeGen/RISCV/rvv/vfnmsub-constrained-sdnode.ll

  Log Message:
  -----------
  [RISCV] Support vector type strict_fma.

Like D145900, the patch also supports fixed vector strict_fma nodes in RISC-V by
customized lowering them to riscv_strict_vfmadd_vl nodes. riscv_strict_vfmadd_vl
is created to avoid some riscv_vfmadd_vl optimizations happening to original
strict_fma nodes. The patch also adds combine patterns for riscv_strict_fmadd_vl
nodes with negation operands.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D146939