[PATCH] D100813: [DAGCombiner] Support fold zero scalar vector.

[JunMa via Phabricator via llvm-commits]

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This patch changes ISD::isBuildVectorAllZeros to
ISD::isConstantSplatVectorAllZeros which supports handle zero sclar vector.

TestPlan: check-llvm


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D100813

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AArch64/sve-int-arith.ll
  llvm/test/CodeGen/AArch64/sve-int-log.ll
  llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv64.ll

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