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Introduce new UnarySDNode/BinarySDNode/TernarySDNode nodes, which coallocate

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their operands with the node itself.  This reduces malloc traffic for operand
lists.  This reduces isel time on kc++ from 2.6164 to 2.5570s, about 2.3%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33878 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-04 08:35:21 +00:00
parent bc2e26241d
commit 3f97eb449b
2 changed files with 72 additions and 12 deletions
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43
include/llvm/CodeGen/SelectionDAGNodes.h
View File

@ -995,6 +995,49 @@ inline bool SDOperand::hasOneUse() const {
return Val->hasNUsesOfValue(1, ResNo);
}
/// UnarySDNode - This class is used for single-operand SDNodes. This is solely
/// to allow co-allocation of node operands with the node itself.
class UnarySDNode : public SDNode {
virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
SDOperand Op;
public:
UnarySDNode(unsigned Opc, SDVTList VTs, SDOperand X)
: SDNode(Opc, VTs), Op(X) {
InitOperands(&Op, 1);
}
};
/// BinarySDNode - This class is used for two-operand SDNodes. This is solely
/// to allow co-allocation of node operands with the node itself.
class BinarySDNode : public SDNode {
virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
SDOperand Ops[2];
public:
BinarySDNode(unsigned Opc, SDVTList VTs, SDOperand X, SDOperand Y)
: SDNode(Opc, VTs) {
Ops[0] = X;
Ops[1] = Y;
InitOperands(Ops, 2);
}
};
/// TernarySDNode - This class is used for three-operand SDNodes. This is solely
/// to allow co-allocation of node operands with the node itself.
class TernarySDNode : public SDNode {
virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
SDOperand Ops[3];
public:
TernarySDNode(unsigned Opc, SDVTList VTs, SDOperand X, SDOperand Y,
SDOperand Z)
: SDNode(Opc, VTs) {
Ops[0] = X;
Ops[1] = Y;
Ops[2] = Z;
InitOperands(Ops, 3);
}
};
/// HandleSDNode - This class is used to form a handle around another node that
/// is persistant and is updated across invocations of replaceAllUsesWith on its
/// operand. This node should be directly created by end-users and not added to

41
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -939,7 +939,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT) {
void *IP = 0;
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
return SDOperand(E, 0);
SDNode *N = new SDNode(Opcode, SDNode::getSDVTList(VT), 0, 0);
SDNode *N = new SDNode(Opcode, SDNode::getSDVTList(VT));
CSEMap.InsertNode(N, IP);
AllNodes.push_back(N);
@ -1113,17 +1113,17 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
SDNode *N;
SDVTList VTs = getVTList(VT);
SDOperand Ops[1] = { Operand };
if (VT != MVT::Flag) { // Don't CSE flag producing nodes
FoldingSetNodeID ID;
SDOperand Ops[1] = { Operand };
AddNodeIDNode(ID, Opcode, VTs, Ops, 1);
void *IP = 0;
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
return SDOperand(E, 0);
N = new SDNode(Opcode, VTs, Ops, 1);
N = new UnarySDNode(Opcode, VTs, Operand);
CSEMap.InsertNode(N, IP);
} else {
N = new SDNode(Opcode, VTs, Ops, 1);
N = new UnarySDNode(Opcode, VTs, Operand);
}
AllNodes.push_back(N);
return SDOperand(N, 0);
@ -1413,17 +1413,17 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
// Memoize this node if possible.
SDNode *N;
SDVTList VTs = getVTList(VT);
SDOperand Ops[] = { N1, N2 };
if (VT != MVT::Flag) {
SDOperand Ops[] = { N1, N2 };
FoldingSetNodeID ID;
AddNodeIDNode(ID, Opcode, VTs, Ops, 2);
void *IP = 0;
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
return SDOperand(E, 0);
N = new SDNode(Opcode, VTs, Ops, 2);
N = new BinarySDNode(Opcode, VTs, N1, N2);
CSEMap.InsertNode(N, IP);
} else {
N = new SDNode(Opcode, VTs, Ops, 2);
N = new BinarySDNode(Opcode, VTs, N1, N2);
}
AllNodes.push_back(N);
@ -1470,17 +1470,17 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
// Memoize node if it doesn't produce a flag.
SDNode *N;
SDVTList VTs = getVTList(VT);
SDOperand Ops[] = { N1, N2, N3 };
if (VT != MVT::Flag) {
SDOperand Ops[] = { N1, N2, N3 };
FoldingSetNodeID ID;
AddNodeIDNode(ID, Opcode, VTs, Ops, 3);
void *IP = 0;
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
return SDOperand(E, 0);
N = new SDNode(Opcode, VTs, Ops, 3);
N = new TernarySDNode(Opcode, VTs, N1, N2, N3);
CSEMap.InsertNode(N, IP);
} else {
N = new SDNode(Opcode, VTs, Ops, 3);
N = new TernarySDNode(Opcode, VTs, N1, N2, N3);
}
AllNodes.push_back(N);
return SDOperand(N, 0);
@ -1809,10 +1809,24 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
void *IP = 0;
if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
return SDOperand(E, 0);
N = new SDNode(Opcode, VTList, Ops, NumOps);
if (NumOps == 1)
N = new UnarySDNode(Opcode, VTList, Ops[0]);
else if (NumOps == 2)
N = new BinarySDNode(Opcode, VTList, Ops[0], Ops[1]);
else if (NumOps == 3)
N = new TernarySDNode(Opcode, VTList, Ops[0], Ops[1], Ops[2]);
else
N = new SDNode(Opcode, VTList, Ops, NumOps);
CSEMap.InsertNode(N, IP);
} else {
N = new SDNode(Opcode, VTList, Ops, NumOps);
if (NumOps == 1)
N = new UnarySDNode(Opcode, VTList, Ops[0]);
else if (NumOps == 2)
N = new BinarySDNode(Opcode, VTList, Ops[0], Ops[1]);
else if (NumOps == 3)
N = new TernarySDNode(Opcode, VTList, Ops[0], Ops[1], Ops[2]);
else
N = new SDNode(Opcode, VTList, Ops, NumOps);
}
AllNodes.push_back(N);
return SDOperand(N, 0);
@ -2490,6 +2504,9 @@ unsigned SelectionDAG::AssignTopologicalOrder(std::vector<SDNode*> &TopOrder) {
// Out-of-line virtual method to give class a home.
void SDNode::ANCHOR() {}
void UnarySDNode::ANCHOR() {}
void BinarySDNode::ANCHOR() {}
void TernarySDNode::ANCHOR() {}
void HandleSDNode::ANCHOR() {}
void StringSDNode::ANCHOR() {}
void ConstantSDNode::ANCHOR() {}