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Change the ValueList array for each node to be shared instead of individually

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allocated.  Further, in the common case where a node has a single value, just
reference an element from a small array.  This is a small compile-time wi.

llvm-svn: 24250
This commit is contained in:
Chris Lattner 2005-11-08 23:30:11 +00:00
parent cffd7d5bdc
commit e1cf681dee
2 changed files with 19 additions and 22 deletions
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13
include/llvm/CodeGen/SelectionDAG.h
View File

@ -17,6 +17,7 @@
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include <map>
#include <list>
#include <string> // FIXME remove eventually, turning map into const char* map.
namespace llvm {
@ -172,7 +173,7 @@ public:
SDOperand Callee, bool isTailCall = false) {
SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, Chain,
Callee);
NN->setValueTypes(RetVals);
setNodeValueTypes(NN, RetVals);
AllNodes.push_back(NN);
return NN;
}
@ -186,7 +187,7 @@ public:
ArgsInRegs.insert(ArgsInRegs.begin(), Callee);
ArgsInRegs.insert(ArgsInRegs.begin(), Chain);
SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, ArgsInRegs);
NN->setValueTypes(RetVals);
setNodeValueTypes(NN, RetVals);
AllNodes.push_back(NN);
return NN;
}
@ -356,12 +357,18 @@ private:
SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
void DestroyDeadNode(SDNode *N);
void DeleteNodeNotInCSEMaps(SDNode *N);
void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals);
void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2);
/// SimplifySetCC - Try to simplify a setcc built with the specified operands
/// and cc. If unable to simplify it, return a null SDOperand.
SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1,
SDOperand N2, ISD::CondCode Cond);
// List of non-single value types.
std::list<std::vector<MVT::ValueType> > VTList;
// Maps to auto-CSE operations.
std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps;
std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >,

28
include/llvm/CodeGen/SelectionDAGNodes.h
View File

@ -577,11 +577,14 @@ public:
protected:
friend class SelectionDAG;
/// getValueTypeList - Return a pointer to the specified value type.
///
static MVT::ValueType *getValueTypeList(MVT::ValueType VT);
SDNode(unsigned NT, MVT::ValueType VT) : NodeType(NT), NodeDepth(1) {
OperandList = 0; NumOperands = 0;
ValueList = new MVT::ValueType[1];
ValueList[0] = VT;
ValueList = getValueTypeList(VT);
NumValues = 1;
}
SDNode(unsigned NT, SDOperand Op)
@ -668,7 +671,6 @@ protected:
virtual ~SDNode() {
assert(NumOperands == 0 && "Operand list not cleared before deletion");
delete [] ValueList;
}
/// MorphNodeTo - This clears the return value and operands list, and sets the
@ -676,7 +678,6 @@ protected:
/// the SelectionDAG class.
void MorphNodeTo(unsigned Opc) {
NodeType = Opc;
delete [] ValueList;
ValueList = 0;
NumValues = 0;
@ -691,24 +692,13 @@ protected:
void setValueTypes(MVT::ValueType VT) {
assert(NumValues == 0 && "Should not have values yet!");
ValueList = new MVT::ValueType[1];
ValueList[0] = VT;
ValueList = getValueTypeList(VT);
NumValues = 1;
}
void setValueTypes(MVT::ValueType VT1, MVT::ValueType VT2) {
void setValueTypes(MVT::ValueType *List, unsigned NumVal) {
assert(NumValues == 0 && "Should not have values yet!");
ValueList = new MVT::ValueType[2];
ValueList[0] = VT1;
ValueList[1] = VT2;
NumValues = 2;
}
void setValueTypes(const std::vector<MVT::ValueType> &VTs) {
assert(NumValues == 0 && "Should not have values yet!");
if (VTs.size() == 0) return; // don't alloc memory.
ValueList = new MVT::ValueType[VTs.size()];
for (unsigned i = 0, e = VTs.size(); i != e; ++i)
ValueList[i] = VTs[i];
NumValues = VTs.size();
ValueList = List;
NumValues = NumVal;
}
void setOperands(SDOperand Op0) {