示例#1
0
void DAGTypeLegalizer::ExpandRes_NormalLoad(SDNode *N, SDValue &Lo,
                                            SDValue &Hi) {
  assert(ISD::isNormalLoad(N) && "This routine only for normal loads!");
  SDLoc dl(N);

  LoadSDNode *LD = cast<LoadSDNode>(N);
  EVT ValueVT = LD->getValueType(0);
  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), ValueVT);
  SDValue Chain = LD->getChain();
  SDValue Ptr = LD->getBasePtr();
  unsigned Alignment = LD->getAlignment();
  bool isVolatile = LD->isVolatile();
  bool isNonTemporal = LD->isNonTemporal();
  bool isInvariant = LD->isInvariant();
  AAMDNodes AAInfo = LD->getAAInfo();

  assert(NVT.isByteSized() && "Expanded type not byte sized!");

  Lo = DAG.getLoad(NVT, dl, Chain, Ptr, LD->getPointerInfo(),
                   isVolatile, isNonTemporal, isInvariant, Alignment,
                   AAInfo);

  // Increment the pointer to the other half.
  unsigned IncrementSize = NVT.getSizeInBits() / 8;
  Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
                    DAG.getConstant(IncrementSize, dl, Ptr.getValueType()));
  Hi = DAG.getLoad(NVT, dl, Chain, Ptr,
                   LD->getPointerInfo().getWithOffset(IncrementSize),
                   isVolatile, isNonTemporal, isInvariant,
                   MinAlign(Alignment, IncrementSize), AAInfo);

  // Build a factor node to remember that this load is independent of the
  // other one.
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
                      Hi.getValue(1));

  // Handle endianness of the load.
  if (TLI.hasBigEndianPartOrdering(ValueVT))
    std::swap(Lo, Hi);

  // Modified the chain - switch anything that used the old chain to use
  // the new one.
  ReplaceValueWith(SDValue(N, 1), Chain);
}
示例#2
0
void DAGTypeLegalizer::ExpandRes_NormalLoad(SDNode *N, SDValue &Lo,
                                            SDValue &Hi) {
  assert(ISD::isNormalLoad(N) && "This routine only for normal loads!");
  DebugLoc dl = N->getDebugLoc();

  LoadSDNode *LD = cast<LoadSDNode>(N);
  MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
  SDValue Chain = LD->getChain();
  SDValue Ptr = LD->getBasePtr();
  int SVOffset = LD->getSrcValueOffset();
  unsigned Alignment = LD->getAlignment();
  bool isVolatile = LD->isVolatile();

  assert(NVT.isByteSized() && "Expanded type not byte sized!");

  Lo = DAG.getLoad(NVT, dl, Chain, Ptr, LD->getSrcValue(), SVOffset,
                   isVolatile, Alignment);

  // Increment the pointer to the other half.
  unsigned IncrementSize = NVT.getSizeInBits() / 8;
  Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
                    DAG.getIntPtrConstant(IncrementSize));
  Hi = DAG.getLoad(NVT, dl, Chain, Ptr, LD->getSrcValue(),
                   SVOffset+IncrementSize,
                   isVolatile, MinAlign(Alignment, IncrementSize));

  // Build a factor node to remember that this load is independent of the
  // other one.
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
                      Hi.getValue(1));

  // Handle endianness of the load.
  if (TLI.isBigEndian())
    std::swap(Lo, Hi);

  // Modified the chain - switch anything that used the old chain to use
  // the new one.
  ReplaceValueWith(SDValue(N, 1), Chain);
}