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Remove some special case hacks for CALLSEQ_*, using UpdateNodeOperands

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instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25780 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-01-29 07:58:15 +00:00
parent c1857c23f5
commit 70814bc384
2 changed files with 27 additions and 60 deletions
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37
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -589,22 +589,24 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
case ISD::CALLSEQ_START:
case ISD::CALLSEQ_END:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
// Do not try to legalize the target-specific arguments (#1+)
Tmp2 = Node->getOperand(0);
if (Tmp1 != Tmp2)
Node->setAdjCallChain(Tmp1);
// If this has a flag input, do legalize it.
if (Node->getOperand(Node->getNumOperands()-1).getValueType() == MVT::Flag){
Tmp1 = LegalizeOp(Node->getOperand(Node->getNumOperands()-1));
if (Tmp1 != Node->getOperand(Node->getNumOperands()-1))
Node->setAdjCallFlag(Tmp1);
// Do not try to legalize the target-specific arguments (#1+), except for
// an optional flag input.
if (Node->getOperand(Node->getNumOperands()-1).getValueType() != MVT::Flag){
if (Tmp1 != Node->getOperand(0)) {
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end());
Ops[0] = Tmp1;
Result = DAG.UpdateNodeOperands(Result, Ops);
}
} else {
Tmp2 = LegalizeOp(Node->getOperand(Node->getNumOperands()-1));
if (Tmp1 != Node->getOperand(0) ||
Tmp2 != Node->getOperand(Node->getNumOperands()-1)) {
std::vector<SDOperand> Ops(Node->op_begin(), Node->op_end());
Ops[0] = Tmp1;
Ops.back() = Tmp2;
Result = DAG.UpdateNodeOperands(Result, Ops);
}
}
// Note that we do not create new CALLSEQ_DOWN/UP nodes here. These
// nodes are treated specially and are mutated in place. This makes the dag
// legalization process more efficient and also makes libcall insertion
// easier.
break;
case ISD::DYNAMIC_STACKALLOC: {
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
@ -2964,7 +2966,10 @@ void SelectionDAGLegalize::SpliceCallInto(const SDOperand &CallResult,
SDOperand InToken = DAG.getNode(ISD::TokenFactor, MVT::Other, CallResult,
OutChain->getOperand(0));
// Change the node to refer to the new token.
OutChain->setAdjCallChain(InToken);
std::vector<SDOperand> Ops(OutChain->op_begin(), OutChain->op_end());
Ops[0] = InToken;
SDOperand Res = DAG.UpdateNodeOperands(SDOperand(OutChain, 0), Ops);
assert(Res.Val == OutChain && "Didn't update in place!");
}