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Token chain results are not always the first or last result. Consider copyfromreg nodes, where they are the middle result (the flag result is last)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25325 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-14 22:41:46 +00:00
parent bc0f46097d
commit c0ab5226cc
1 changed files with 17 additions and 3 deletions
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20
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -3016,6 +3016,7 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
Tmp2 = LegalizeOp(Node->getOperand(1));
Result = DAG.getNode(ISD::SRL, NVT, Tmp1, Tmp2);
break;
case ISD::LOAD:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
@ -3374,11 +3375,24 @@ static SDNode *FindCallSeqEnd(SDNode *Node) {
if (Node->use_empty())
return 0; // No CallSeqEnd
// The chain is usually at the end.
SDOperand TheChain(Node, Node->getNumValues()-1);
if (TheChain.getValueType() != MVT::Other)
if (TheChain.getValueType() != MVT::Other) {
// Sometimes it's at the beginning.
TheChain = SDOperand(Node, 0);
if (TheChain.getValueType() != MVT::Other)
return 0;
if (TheChain.getValueType() != MVT::Other) {
// Otherwise, hunt for it.
for (unsigned i = 1, e = Node->getNumValues(); i != e; ++i)
if (Node->getValueType(i) == MVT::Other) {
TheChain = SDOperand(Node, i);
break;
}
// Otherwise, we walked into a node without a chain.
if (TheChain.getValueType() != MVT::Other)
return 0;
}
}
for (SDNode::use_iterator UI = Node->use_begin(),
E = Node->use_end(); UI != E; ++UI) {