[PATCH] D121187: [DAGCombiner][VP] Add DAGCombine for VP_MUL.

[Jianjian Guan via Phabricator via llvm-commits]

jacquesguan created this revision.
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This patch contains two DAGCombine:
fold vp_mul X, (splat -1), Mask, EVL -> vp_sub (splat 0), X, Mask, EVL
fold vp_mul X, (1 << C), Mask, EVL -> vp_shl X, C, Mask, EVL


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121187

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vmul-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vmul-vp.ll

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