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implement expansion of ctpop nodes, implementing CodeGen/Generic/llvm-ct-intrinsics.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21856 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-11 04:51:16 +00:00
parent 276260b16d
commit edb1add9a0
1 changed files with 16 additions and 5 deletions
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21
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -635,16 +635,16 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
if (!TLI.isLittleEndian())
std::swap(Lo, Hi);
Lo = DAG.getNode(ISD::STORE, MVT::Other,Tmp1, Lo, Tmp2,Node->getOperand(3));
Lo = DAG.getNode(ISD::STORE, MVT::Other, Tmp1, Lo, Tmp2,
Node->getOperand(3));
unsigned IncrementSize = MVT::getSizeInBits(Hi.getValueType())/8;
Tmp2 = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2,
getIntPtrConstant(IncrementSize));
assert(isTypeLegal(Tmp2.getValueType()) &&
"Pointers must be legal!");
//Again, claiming both parts of the store came form the same Instr
Hi = DAG.getNode(ISD::STORE, MVT::Other, Tmp1, Hi, Tmp2, Node->getOperand(3));
Hi = DAG.getNode(ISD::STORE, MVT::Other, Tmp1, Hi, Tmp2,
Node->getOperand(3));
Result = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo, Hi);
break;
}
@ -1079,7 +1079,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
case TargetLowering::Promote: {
MVT::ValueType OVT = Tmp1.getValueType();
MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
//Zero extend the argument
// Zero extend the argument.
Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
// Perform the larger operation, then subtract if needed.
Tmp1 = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
@ -2170,6 +2171,16 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
Hi = LegalizeOp(Node->getOperand(1));
break;
case ISD::CTPOP:
ExpandOp(Node->getOperand(0), Lo, Hi);
Lo = DAG.getNode(ISD::ADD, NVT, Lo, Hi);
Hi = DAG.getConstant(0, NVT);
break;
case ISD::CTTZ:
case ISD::CTLZ:
assert(0 && "ct intrinsics cannot be expanded!");
case ISD::LOAD: {
SDOperand Ch = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
SDOperand Ptr = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.