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[SDAG] Simplify the code for handling single-value nodes and add 

a missing transfer of debug information (without which tests fail).

llvm-svn: 214021
This commit is contained in:
Chandler Carruth 2014-07-26 05:52:51 +00:00
parent 411fb407f8
commit 98655fa4d8
1 changed files with 12 additions and 8 deletions
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20
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1344,15 +1344,19 @@ void SelectionDAGLegalize::LegalizeOp(SDNode *Node) {
// a complete mess.
SDValue Res = TLI.LowerOperation(SDValue(Node, 0), DAG);
if (Res.getNode()) {
SmallVector<SDValue, 8> ResultVals;
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) {
if (e == 1)
ResultVals.push_back(Res);
else
ResultVals.push_back(Res.getValue(i));
if (!(Res.getNode() != Node || Res.getResNo() != 0))
return;
if (Node->getNumValues() == 1) {
// We can just directly replace this node with the lowered value.
ReplaceNode(SDValue(Node, 0), Res);
return;
}
if (Res.getNode() != Node || Res.getResNo() != 0)
ReplaceNode(Node, ResultVals.data());
SmallVector<SDValue, 8> ResultVals;
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
ResultVals.push_back(Res.getValue(i));
ReplaceNode(Node, ResultVals.data());
return;
}
}