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Allow custom expansion of ConstantVec nodes. PPC will use this in the future.

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llvm-svn: 25774
This commit is contained in:
Chris Lattner 2006-01-29 06:34:16 +00:00
parent 6c4173145e
commit 94e9677374
1 changed files with 35 additions and 22 deletions
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57
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -530,30 +530,43 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
}
break;
}
case ISD::ConstantVec: {
// We assume that vector constants are not legal, and will be immediately
// spilled to the constant pool.
//
// FIXME: Allow custom lowering to TargetConstantVec's.
//
// Create a ConstantPacked, and put it in the constant pool.
std::vector<Constant*> CV;
MVT::ValueType VT = Node->getValueType(0);
for (unsigned I = 0, E = Node->getNumOperands(); I < E; ++I) {
SDOperand OpN = Node->getOperand(I);
const Type* OpNTy = MVT::getTypeForValueType(OpN.getValueType());
if (MVT::isFloatingPoint(VT))
CV.push_back(ConstantFP::get(OpNTy,
cast<ConstantFPSDNode>(OpN)->getValue()));
else
CV.push_back(ConstantUInt::get(OpNTy,
cast<ConstantSDNode>(OpN)->getValue()));
case ISD::ConstantVec:
switch (TLI.getOperationAction(ISD::ConstantVec, Node->getValueType(0))) {
default: assert(0 && "This action is not supported yet!");
case TargetLowering::Custom:
Tmp3 = TLI.LowerOperation(Result, DAG);
if (Tmp3.Val) {
Result = Tmp3;
break;
}
// FALLTHROUGH
case TargetLowering::Expand:
// We assume that vector constants are not legal, and will be immediately
// spilled to the constant pool.
//
// Create a ConstantPacked, and put it in the constant pool.
MVT::ValueType VT = Node->getValueType(0);
const Type *OpNTy =
MVT::getTypeForValueType(Node->getOperand(0).getValueType());
std::vector<Constant*> CV;
if (MVT::isFloatingPoint(VT)) {
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
double V = cast<ConstantFPSDNode>(Node->getOperand(i))->getValue();
CV.push_back(ConstantFP::get(OpNTy, V));
}
} else {
for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
uint64_t V = cast<ConstantSDNode>(Node->getOperand(i))->getValue();
CV.push_back(ConstantUInt::get(OpNTy, V));
}
}
Constant *CP = ConstantPacked::get(CV);
SDOperand CPIdx = DAG.getConstantPool(CP, TLI.getPointerTy());
Result = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx,
DAG.getSrcValue(NULL));
break;
}
Constant *CP = ConstantPacked::get(CV);
SDOperand CPIdx = DAG.getConstantPool(CP, TLI.getPointerTy());
Result = DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, DAG.getSrcValue(NULL));
break;
}
case ISD::TokenFactor:
if (Node->getNumOperands() == 2) {
Tmp1 = LegalizeOp(Node->getOperand(0));