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Add a new CallGraph::getOrInsertFunction for clients to use when updating

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the callgraph.

llvm-svn: 25317
This commit is contained in:
Chris Lattner 2006-01-14 20:03:00 +00:00
parent 62ab0d6471
commit ab3707bf90
1 changed files with 19 additions and 16 deletions
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35
lib/Analysis/IPA/CallGraph.cpp
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@ -56,7 +56,7 @@ public:
destroy();
CallGraph::initialize(M);
ExternalCallingNode = getNodeFor(0);
ExternalCallingNode = getOrInsertFunction(0);
CallsExternalNode = new CallGraphNode(0);
Root = 0;
@ -107,24 +107,12 @@ private:
//===---------------------------------------------------------------------
// Implementation of CallGraph construction
//
// getNodeFor - Return the node for the specified function or create one if it
// does not already exist.
//
CallGraphNode *getNodeFor(Function *F) {
CallGraphNode *&CGN = FunctionMap[F];
if (CGN) return CGN;
assert((!F || F->getParent() == Mod) && "Function not in current module!");
return CGN = new CallGraphNode(F);
}
//
// addToCallGraph - Add a function to the call graph, and link the node to all
// of the functions that it calls.
//
void addToCallGraph(Function *F) {
CallGraphNode *Node = getNodeFor(F);
CallGraphNode *Node = getOrInsertFunction(F);
// If this function has external linkage, anything could call it...
if (!F->hasInternalLinkage()) {
@ -150,7 +138,8 @@ private:
for (Value::use_iterator I = F->use_begin(), E = F->use_end(); I != E; ++I){
if (Instruction *Inst = dyn_cast<Instruction>(*I)) {
if (isOnlyADirectCall(F, CallSite::get(Inst)))
getNodeFor(Inst->getParent()->getParent())->addCalledFunction(Node);
getOrInsertFunction(Inst->getParent()->getParent())
->addCalledFunction(Node);
else
isUsedExternally = true;
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(*I)) {
@ -158,7 +147,8 @@ private:
I != E; ++I)
if (Instruction *Inst = dyn_cast<Instruction>(*I)) {
if (isOnlyADirectCall(F, CallSite::get(Inst)))
getNodeFor(Inst->getParent()->getParent())->addCalledFunction(Node);
getOrInsertFunction(Inst->getParent()->getParent())
->addCalledFunction(Node);
else
isUsedExternally = true;
} else {
@ -255,6 +245,19 @@ void CallGraph::changeFunction(Function *OldF, Function *NewF) {
FunctionMap.erase(I);
}
// getOrInsertFunction - This method is identical to calling operator[], but
// it will insert a new CallGraphNode for the specified function if one does
// not already exist.
CallGraphNode *CallGraph::getOrInsertFunction(const Function *F) {
CallGraphNode *&CGN = FunctionMap[F];
if (CGN) return CGN;
assert((!F || F->getParent() == Mod) && "Function not in current module!");
return CGN = new CallGraphNode(const_cast<Function*>(F));
}
void CallGraph::stub() {}
void CallGraphNode::print(std::ostream &OS) const {