[PATCH] D126273: [DAGCombiner][VP] Add DAGCombine for merging VP_FADD and VP_FMUL to VP_FMA.

[Yeting Kuo via Phabricator via llvm-commits]

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The patch does two DAGcombines:
fold (vp_fadd a, (vp_mul b, c)) to (vp_fma b, c, a)
fold (vp_fadd (vp_mul a, b), c) to (vp_fma a, b, c)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126273

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/RISCV/rvv/fold-fadd-and-fmul.ll

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