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Don't allocate empty read-only SmallVectors during SelectionDAG deallocation. 

llvm-svn: 133348
This commit is contained in:
Benjamin Kramer 2011-06-18 13:13:44 +00:00
parent 25e17b0f89
commit e1fc29b6ac
3 changed files with 11 additions and 7 deletions
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10
llvm/include/llvm/CodeGen/SelectionDAG.h
View File

@ -96,8 +96,12 @@ public:
return DbgValues.empty() && ByvalParmDbgValues.empty();
}
SmallVector<SDDbgValue*,2> &getSDDbgValues(const SDNode *Node) {
return DbgValMap[Node];
ArrayRef<SDDbgValue*> getSDDbgValues(const SDNode *Node) {
DenseMap<const SDNode*, SmallVector<SDDbgValue*, 2> >::iterator I =
DbgValMap.find(Node);
if (I != DbgValMap.end())
return I->second;
return ArrayRef<SDDbgValue*>();
}
typedef SmallVector<SDDbgValue*,32>::iterator DbgIterator;
@ -898,7 +902,7 @@ public:
void AddDbgValue(SDDbgValue *DB, SDNode *SD, bool isParameter);
/// GetDbgValues - Get the debug values which reference the given SDNode.
SmallVector<SDDbgValue*,2> &GetDbgValues(const SDNode* SD) {
ArrayRef<SDDbgValue*> GetDbgValues(const SDNode* SD) {
return DbgInfo->getSDDbgValues(SD);
}

2
llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
View File

@ -649,7 +649,7 @@ static void ProcessSDDbgValues(SDNode *N, SelectionDAG *DAG,
// order number right after the N.
MachineBasicBlock *BB = Emitter.getBlock();
MachineBasicBlock::iterator InsertPos = Emitter.getInsertPos();
SmallVector<SDDbgValue*,2> &DVs = DAG->GetDbgValues(N);
ArrayRef<SDDbgValue*> DVs = DAG->GetDbgValues(N);
for (unsigned i = 0, e = DVs.size(); i != e; ++i) {
if (DVs[i]->isInvalidated())
continue;

6
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -598,7 +598,7 @@ void SelectionDAG::DeallocateNode(SDNode *N) {
Ordering->remove(N);
// If any of the SDDbgValue nodes refer to this SDNode, invalidate them.
SmallVector<SDDbgValue*, 2> &DbgVals = DbgInfo->getSDDbgValues(N);
ArrayRef<SDDbgValue*> DbgVals = DbgInfo->getSDDbgValues(N);
for (unsigned i = 0, e = DbgVals.size(); i != e; ++i)
DbgVals[i]->setIsInvalidated();
}
@ -5508,9 +5508,9 @@ void SelectionDAG::TransferDbgValues(SDValue From, SDValue To) {
return;
SDNode *FromNode = From.getNode();
SDNode *ToNode = To.getNode();
SmallVector<SDDbgValue *, 2> &DVs = GetDbgValues(FromNode);
ArrayRef<SDDbgValue *> DVs = GetDbgValues(FromNode);
SmallVector<SDDbgValue *, 2> ClonedDVs;
for (SmallVector<SDDbgValue *, 2>::iterator I = DVs.begin(), E = DVs.end();
for (ArrayRef<SDDbgValue *>::iterator I = DVs.begin(), E = DVs.end();
I != E; ++I) {
SDDbgValue *Dbg = *I;
if (Dbg->getKind() == SDDbgValue::SDNODE) {