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Change the ValueList array for each node to be shared instead of individuallyallocated. Further, in the common case where a node has a single value, justreference an element from a small array. This is a small compile-time win.

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llvm-svn: 24251
This commit is contained in:
Chris Lattner 2005-11-08 23:30:28 +00:00
parent e1cf681dee
commit 89f1b405f4
1 changed files with 48 additions and 5 deletions
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53
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -426,7 +426,6 @@ SDNode *SelectionDAG::AddNonLeafNodeToCSEMaps(SDNode *N) {
AN = N;
}
return 0;
}
@ -1100,7 +1099,7 @@ SDOperand SelectionDAG::getLoad(MVT::ValueType VT,
N = new SDNode(ISD::LOAD, Chain, Ptr, SV);
// Loads have a token chain.
N->setValueTypes(VT, MVT::Other);
setNodeValueTypes(N, VT, MVT::Other);
AllNodes.push_back(N);
return SDOperand(N, 0);
}
@ -1344,11 +1343,46 @@ SDOperand SelectionDAG::getNode(unsigned Opcode,
} else {
N = new SDNode(Opcode, Ops);
}
N->setValueTypes(ResultTys);
setNodeValueTypes(N, ResultTys);
AllNodes.push_back(N);
return SDOperand(N, 0);
}
void SelectionDAG::setNodeValueTypes(SDNode *N,
std::vector<MVT::ValueType> &RetVals) {
switch (RetVals.size()) {
case 0: return;
case 1: N->setValueTypes(RetVals[0]); return;
case 2: setNodeValueTypes(N, RetVals[0], RetVals[1]); return;
default: break;
}
std::list<std::vector<MVT::ValueType> >::iterator I =
std::find(VTList.begin(), VTList.end(), RetVals);
if (I == VTList.end()) {
VTList.push_front(RetVals);
I = VTList.begin();
}
N->setValueTypes(&(*I)[0], I->size());
}
void SelectionDAG::setNodeValueTypes(SDNode *N, MVT::ValueType VT1,
MVT::ValueType VT2) {
for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(),
E = VTList.end(); I != E; ++I) {
if (I->size() == 2 && (*I)[0] == VT1 && (*I)[1] == VT2) {
N->setValueTypes(&(*I)[0], 2);
return;
}
}
std::vector<MVT::ValueType> V;
V.push_back(VT1);
V.push_back(VT2);
VTList.push_front(V);
N->setValueTypes(&(*VTList.begin())[0], 2);
}
/// SelectNodeTo - These are used for target selectors to *mutate* the
/// specified node to have the specified return type, Target opcode, and
@ -1380,7 +1414,7 @@ void SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
SDOperand Op1, SDOperand Op2) {
RemoveNodeFromCSEMaps(N);
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
N->setValueTypes(VT1, VT2);
setNodeValueTypes(N, VT1, VT2);
N->setOperands(Op1, Op2);
}
void SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
@ -1396,7 +1430,7 @@ void SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
SDOperand Op1, SDOperand Op2, SDOperand Op3) {
RemoveNodeFromCSEMaps(N);
N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc);
N->setValueTypes(VT1, VT2);
setNodeValueTypes(N, VT1, VT2);
N->setOperands(Op1, Op2, Op3);
}
@ -1546,6 +1580,15 @@ void SelectionDAG::ReplaceAllUsesWith(SDNode *From,
// SDNode Class
//===----------------------------------------------------------------------===//
/// getValueTypeList - Return a pointer to the specified value type.
///
MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) {
static MVT::ValueType VTs[MVT::LAST_VALUETYPE];
VTs[VT] = VT;
return &VTs[VT];
}
/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
/// indicated value. This method ignores uses of other values defined by this
/// operation.