[PATCH] D146939: [RISCV] Support vector type strict_fma.

[Yeting Kuo via Phabricator via llvm-commits]

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Like D145900 <https://reviews.llvm.org/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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D146939

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

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