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Add support for targets that pass args in registers to calls.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19703 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-19 20:24:35 +00:00
parent 02b86f52ed
commit 3d9dffc586
1 changed files with 25 additions and 6 deletions
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31
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -305,15 +305,23 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
return Result.getValue(Op.ResNo);
case ISD::CALL:
case ISD::CALL: {
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the callee.
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1)) {
bool Changed = false;
std::vector<SDOperand> Ops;
for (unsigned i = 2, e = Node->getNumOperands(); i != e; ++i) {
Ops.push_back(LegalizeOp(Node->getOperand(i)));
Changed |= Ops.back() != Node->getOperand(i);
}
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) || Changed) {
std::vector<MVT::ValueType> RetTyVTs;
RetTyVTs.reserve(Node->getNumValues());
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
RetTyVTs.push_back(Node->getValueType(i));
Result = SDOperand(DAG.getCall(RetTyVTs, Tmp1, Tmp2), 0);
Result = SDOperand(DAG.getCall(RetTyVTs, Tmp1, Tmp2, Ops), 0);
} else {
Result = Result.getValue(0);
}
@ -322,7 +330,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
AddLegalizedOperand(SDOperand(Node, i), Result.getValue(i));
return Result.getValue(Op.ResNo);
}
case ISD::BR:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
if (Tmp1 != Node->getOperand(0))
@ -1151,13 +1159,17 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the callee.
std::vector<SDOperand> Ops;
for (unsigned i = 2, e = Node->getNumOperands(); i != e; ++i)
Ops.push_back(LegalizeOp(Node->getOperand(i)));
assert(Node->getNumValues() == 2 && Op.ResNo == 0 &&
"Can only promote single result calls");
std::vector<MVT::ValueType> RetTyVTs;
RetTyVTs.reserve(2);
RetTyVTs.push_back(NVT);
RetTyVTs.push_back(MVT::Other);
SDNode *NC = DAG.getCall(RetTyVTs, Tmp1, Tmp2);
SDNode *NC = DAG.getCall(RetTyVTs, Tmp1, Tmp2, Ops);
Result = SDOperand(NC, 0);
// Insert the new chain mapping.
@ -1320,6 +1332,13 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
SDOperand Chain = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
SDOperand Callee = LegalizeOp(Node->getOperand(1)); // Legalize the callee.
bool Changed = false;
std::vector<SDOperand> Ops;
for (unsigned i = 2, e = Node->getNumOperands(); i != e; ++i) {
Ops.push_back(LegalizeOp(Node->getOperand(i)));
Changed |= Ops.back() != Node->getOperand(i);
}
assert(Node->getNumValues() == 2 && Op.ResNo == 0 &&
"Can only expand a call once so far, not i64 -> i16!");
@ -1328,7 +1347,7 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
RetTyVTs.push_back(NVT);
RetTyVTs.push_back(NVT);
RetTyVTs.push_back(MVT::Other);
SDNode *NC = DAG.getCall(RetTyVTs, Chain, Callee);
SDNode *NC = DAG.getCall(RetTyVTs, Chain, Callee, Ops);
Lo = SDOperand(NC, 0);
Hi = SDOperand(NC, 1);