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make CallGraphNode dtor abort if a node is deleted when there are still
references to it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101847 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -187,6 +187,9 @@ public:
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// CallGraphNode ctor - Create a node for the specified function.
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inline CallGraphNode(Function *f) : F(f), NumReferences(0) {}
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~CallGraphNode() {
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assert(NumReferences == 0 && "Node deleted while references remain");
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}
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//===---------------------------------------------------------------------
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// Accessor methods.
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@ -277,6 +280,11 @@ public:
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/// time, so it should be used sparingly.
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void replaceCallEdge(CallSite CS, CallSite NewCS, CallGraphNode *NewNode);
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/// allReferencesDropped - This is a special function that should only be
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/// used by the CallGraph class.
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void allReferencesDropped() {
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NumReferences = 0;
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}
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};
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//===----------------------------------------------------------------------===//
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@ -158,6 +158,7 @@ private:
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// destroy - Release memory for the call graph
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virtual void destroy() {
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/// CallsExternalNode is not in the function map, delete it explicitly.
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CallsExternalNode->allReferencesDropped();
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delete CallsExternalNode;
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CallsExternalNode = 0;
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CallGraph::destroy();
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@ -181,6 +182,14 @@ void CallGraph::initialize(Module &M) {
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void CallGraph::destroy() {
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if (FunctionMap.empty()) return;
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// Reset all node's use counts to zero before deleting them to prevent an
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// assertion from firing.
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#ifndef NDEBUG
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for (FunctionMapTy::iterator I = FunctionMap.begin(), E = FunctionMap.end();
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I != E; ++I)
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I->second->allReferencesDropped();
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#endif
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for (FunctionMapTy::iterator I = FunctionMap.begin(), E = FunctionMap.end();
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I != E; ++I)
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delete I->second;
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