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Teach legalize to deal with DYNAMIC_STACKALLOC (aka a dynamic llvm alloca)

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llvm-svn: 19415
This commit is contained in:
Chris Lattner 2005-01-09 19:03:49 +00:00
parent 45155a3dee
commit b3e31c6def
1 changed files with 16 additions and 1 deletions
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17
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -229,7 +229,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
if (I != LegalizedNodes.end()) return I->second;
}
SDOperand Tmp1, Tmp2;
SDOperand Tmp1, Tmp2, Tmp3;
SDOperand Result = Op;
SDNode *Node = Op.Val;
@ -307,6 +307,21 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Result = DAG.getNode(Node->getOpcode(), MVT::Other, Tmp1,
Node->getOperand(1));
break;
case ISD::DYNAMIC_STACKALLOC:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the size.
Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the alignment.
if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) ||
Tmp3 != Node->getOperand(2))
Result = DAG.getNode(ISD::DYNAMIC_STACKALLOC, Node->getValueType(0),
Tmp1, Tmp2, Tmp3);
// Since this op produces two values, make sure to remember that we
// legalized both of them.
AddLegalizedOperand(SDOperand(Node, 0), Result);
AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
return Result.getValue(Op.ResNo);
case ISD::CALL:
Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the callee.