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* Implement DSNode::removeAllIncomingEdges

Browse Source 
* Implement Critical Shadow node handling
* Implement routines to determine whether an allocation node is a malloc
  or alloca

llvm-svn: 2003
This commit is contained in:
Chris Lattner 2002-03-27 19:46:05 +00:00
parent a16c85b43d
commit 4c6e9cda3f
1 changed files with 20 additions and 6 deletions
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26
lib/Analysis/DataStructure/NodeImpl.cpp
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@ -65,6 +65,13 @@ void DSNode::removeReferrer(PointerValSet *PVS) {
}
// removeAllIncomingEdges - Erase all edges in the graph that point to this node
void DSNode::removeAllIncomingEdges() {
while (!Referrers.empty())
Referrers.back()->removePointerTo(this);
}
static void replaceIn(std::string &S, char From, const std::string &To) {
for (unsigned i = 0; i < S.size(); )
if (S[i] == From) {
@ -145,12 +152,14 @@ NewDSNode::NewDSNode(AllocationInst *V)
: DSNode(NewNode, V->getType()->getElementType()), Allocation(V) {
}
bool NewDSNode::isAllocaNode() const {
return isa<AllocaInst>(Allocation);
}
string NewDSNode::getCaption() const {
stringstream OS;
if (isa<MallocInst>(Allocation))
OS << "new ";
else
OS << "alloca ";
OS << (isMallocNode() ? "new " : "alloca ");
WriteTypeSymbolic(OS, getType(),
Allocation->getParent()->getParent()->getParent());
@ -170,11 +179,12 @@ string GlobalDSNode::getCaption() const {
}
ShadowDSNode::ShadowDSNode(DSNode *P, Module *M)
ShadowDSNode::ShadowDSNode(DSNode *P, Module *M, bool C = false)
: DSNode(ShadowNode, cast<PointerType>(P->getType())->getElementType()) {
Parent = P;
Mod = M;
ShadowParent = 0;
CriticalNode = C;
}
ShadowDSNode::ShadowDSNode(const Type *Ty, Module *M, ShadowDSNode *ShadParent)
@ -182,12 +192,16 @@ ShadowDSNode::ShadowDSNode(const Type *Ty, Module *M, ShadowDSNode *ShadParent)
Parent = 0;
Mod = M;
ShadowParent = ShadParent;
CriticalNode = false;
}
std::string ShadowDSNode::getCaption() const {
stringstream OS;
if (CriticalNode) OS << "# ";
OS << "shadow ";
WriteTypeSymbolic(OS, getType(), Mod);
return "shadow " + OS.str();
if (CriticalNode) OS << " #";
return OS.str();
}
void ShadowDSNode::mapNode(map<const DSNode*, DSNode*> &NodeMap,