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// file:
//  crix/analyzer/src/lib/Analyzer.h

typedef DenseMap<Function*, CallInstSet> CallerMap;
typedef DenseMap<CallInst *, FuncSet> CalleeMap;

struct GlobalContext {
    // ...
	// Map a callsite to all potential callee functions.
	CalleeMap Callees;

	// Map a function to all potential caller instructions.
	CallerMap Callers;
    // ...
}