DAG: Use poison in SplitVecRes_VP_LOAD_FF

Author: arsenm

llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp

@@ -2363,7 +2363,7 @@ void DAGTypeLegalizer::SplitVecRes_VP_LOAD_FF(VPLoadFFSDNode *LD, SDValue &Lo,
  Lo = DAG.getLoadFFVP(LoVT, dl, Ch, Ptr, MaskLo, EVLLo, MMO);
 
  // Fill the upper half with poison.
- Hi = DAG.getUNDEF(HiVT);
+ Hi = DAG.getPOISON(HiVT);
 
  ReplaceValueWith(SDValue(LD, 1), Lo.getValue(1));
  ReplaceValueWith(SDValue(LD, 2), Lo.getValue(2));