#include "llvm/Instructions.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Support/CallSite.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// BasicCallGraph class definition
//
-class BasicCallGraph : public CallGraph, public ModulePass {
+class BasicCallGraph : public ModulePass, public CallGraph {
// Root is root of the call graph, or the external node if a 'main' function
// couldn't be found.
//
public:
static char ID; // Class identification, replacement for typeinfo
- BasicCallGraph() : ModulePass(&ID), Root(0),
- ExternalCallingNode(0), CallsExternalNode(0) {}
+ BasicCallGraph() : ModulePass(ID), Root(0),
+ ExternalCallingNode(0), CallsExternalNode(0) {
+ initializeBasicCallGraphPass(*PassRegistry::getPassRegistry());
+ }
// runOnModule - Compute the call graph for the specified module.
virtual bool runOnModule(Module &M) {
destroy();
}
+ /// getAdjustedAnalysisPointer - This method is used when a pass implements
+ /// an analysis interface through multiple inheritance. If needed, it should
+ /// override this to adjust the this pointer as needed for the specified pass
+ /// info.
+ virtual void *getAdjustedAnalysisPointer(AnalysisID PI) {
+ if (PI == &CallGraph::ID)
+ return (CallGraph*)this;
+ return this;
+ }
+
CallGraphNode* getExternalCallingNode() const { return ExternalCallingNode; }
CallGraphNode* getCallsExternalNode() const { return CallsExternalNode; }
}
}
- // Loop over all of the users of the function, looking for non-call uses.
- for (Value::use_iterator I = F->use_begin(), E = F->use_end(); I != E; ++I)
- if ((!isa<CallInst>(I) && !isa<InvokeInst>(I))
- || !CallSite(cast<Instruction>(I)).isCallee(I)) {
- // Not a call, or being used as a parameter rather than as the callee.
- ExternalCallingNode->addCalledFunction(CallSite(), Node);
- break;
- }
+ // If this function has its address taken, anything could call it.
+ if (F->hasAddressTaken())
+ ExternalCallingNode->addCalledFunction(CallSite(), Node);
// If this function is not defined in this translation unit, it could call
// anything.
for (Function::iterator BB = F->begin(), BBE = F->end(); BB != BBE; ++BB)
for (BasicBlock::iterator II = BB->begin(), IE = BB->end();
II != IE; ++II) {
- CallSite CS = CallSite::get(II);
- if (CS.getInstruction() && !isa<DbgInfoIntrinsic>(II)) {
+ CallSite CS(cast<Value>(II));
+ if (CS && !isa<IntrinsicInst>(II)) {
const Function *Callee = CS.getCalledFunction();
if (Callee)
Node->addCalledFunction(CS, getOrInsertFunction(Callee));
// destroy - Release memory for the call graph
virtual void destroy() {
/// CallsExternalNode is not in the function map, delete it explicitly.
- delete CallsExternalNode;
- CallsExternalNode = 0;
+ if (CallsExternalNode) {
+ CallsExternalNode->allReferencesDropped();
+ delete CallsExternalNode;
+ CallsExternalNode = 0;
+ }
CallGraph::destroy();
}
};
} //End anonymous namespace
-static RegisterAnalysisGroup<CallGraph> X("Call Graph");
-static RegisterPass<BasicCallGraph>
-Y("basiccg", "Basic CallGraph Construction", false, true);
-static RegisterAnalysisGroup<CallGraph, true> Z(Y);
+INITIALIZE_ANALYSIS_GROUP(CallGraph, "Call Graph", BasicCallGraph)
+INITIALIZE_AG_PASS(BasicCallGraph, CallGraph, "basiccg",
+ "Basic CallGraph Construction", false, true, true)
char CallGraph::ID = 0;
char BasicCallGraph::ID = 0;
void CallGraph::destroy() {
if (FunctionMap.empty()) return;
+ // Reset all node's use counts to zero before deleting them to prevent an
+ // assertion from firing.
+#ifndef NDEBUG
+ for (FunctionMapTy::iterator I = FunctionMap.begin(), E = FunctionMap.end();
+ I != E; ++I)
+ I->second->allReferencesDropped();
+#endif
+
for (FunctionMapTy::iterator I = FunctionMap.begin(), E = FunctionMap.end();
I != E; ++I)
delete I->second;
I->second->print(OS);
}
void CallGraph::dump() const {
- print(errs(), 0);
+ print(dbgs(), 0);
}
//===----------------------------------------------------------------------===//
return F;
}
+/// spliceFunction - Replace the function represented by this node by another.
+/// This does not rescan the body of the function, so it is suitable when
+/// splicing the body of the old function to the new while also updating all
+/// callers from old to new.
+///
+void CallGraph::spliceFunction(const Function *From, const Function *To) {
+ assert(FunctionMap.count(From) && "No CallGraphNode for function!");
+ assert(!FunctionMap.count(To) &&
+ "Pointing CallGraphNode at a function that already exists");
+ FunctionMapTy::iterator I = FunctionMap.find(From);
+ I->second->F = const_cast<Function*>(To);
+ FunctionMap[To] = I->second;
+ 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.
else
OS << "Call graph node <<null function>>";
- OS << "<<0x" << this << ">> #uses=" << getNumReferences() << '\n';
+ OS << "<<" << this << ">> #uses=" << getNumReferences() << '\n';
- for (const_iterator I = begin(), E = end(); I != E; ++I)
+ for (const_iterator I = begin(), E = end(); I != E; ++I) {
+ OS << " CS<" << I->first << "> calls ";
if (Function *FI = I->second->getFunction())
- OS << " Calls function '" << FI->getName() <<"'\n";
- else
- OS << " Calls external node\n";
- OS << "\n";
+ OS << "function '" << FI->getName() <<"'\n";
+ else
+ OS << "external node\n";
+ }
+ OS << '\n';
}
-void CallGraphNode::dump() const { print(errs()); }
+void CallGraphNode::dump() const { print(dbgs()); }
/// removeCallEdgeFor - This method removes the edge in the node for the
/// specified call site. Note that this method takes linear time, so it
}
}
-
// removeAnyCallEdgeTo - This method removes any call edges from this node to
// the specified callee function. This takes more time to execute than
// removeCallEdgeTo, so it should not be used unless necessary.
projects / oota-llvm.git / blobdiff