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Eliminate special purpose hacks for dynamic_stack_alloc.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22015 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-14 07:29:57 +00:00
parent e89083a930
commit adf6c2a0cb
3 changed files with 15 additions and 20 deletions
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10
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -373,10 +373,12 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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);
else
Tmp3 != Node->getOperand(2)) {
std::vector<MVT::ValueType> VTs(Node->value_begin(), Node->value_end());
std::vector<SDOperand> Ops;
Ops.push_back(Tmp1); Ops.push_back(Tmp2); Ops.push_back(Tmp3);
Result = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops);
} else
Result = Op.getValue(0);
// Since this op produces two values, make sure to remember that we

14
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -1350,19 +1350,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
}
SDNode *N = new SDNode(Opcode, N1, N2, N3);
switch (Opcode) {
case ISD::SRA_PARTS:
case ISD::SRL_PARTS:
case ISD::SHL_PARTS:
assert(0 && "Should not get here!");
default:
N->setValueTypes(VT);
break;
case ISD::DYNAMIC_STACKALLOC: // DYNAMIC_STACKALLOC produces pointer and chain
N->setValueTypes(VT, MVT::Other);
break;
}
N->setValueTypes(VT);
// FIXME: memoize NODES
AllNodes.push_back(N);
return SDOperand(N, 0);

11
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -617,9 +617,14 @@ void SelectionDAGLowering::visitAlloca(AllocaInst &I) {
getIntPtrConstant(~(uint64_t)(StackAlign-1)));
}
SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, AllocSize.getValueType(),
getRoot(), AllocSize,
getIntPtrConstant(Align));
std::vector<MVT::ValueType> VTs;
VTs.push_back(AllocSize.getValueType());
VTs.push_back(MVT::Other);
std::vector<SDOperand> Ops;
Ops.push_back(getRoot());
Ops.push_back(AllocSize);
Ops.push_back(getIntPtrConstant(Align));
SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops);
DAG.setRoot(setValue(&I, DSA).getValue(1));
// Inform the Frame Information that we have just allocated a variable-sized