186   void replaceBy(Function *G) const {  in replaceBy()
187     F = G;  in replaceBy()
255   void mergeTwoFunctions(Function *F, Function *G);
266   void eraseTail(Function *G);
279   void writeThunk(Function *F, Function *G);
282   void writeAlias(Function *F, Function *G);
286   bool writeThunkOrAlias(Function *F, Function *G);
289   void replaceFunctionInTree(const FunctionNode &FN, Function *G);
545 void MergeFunctions::eraseTail(Function *G) {  in eraseTail()  argument
547   for (BasicBlock &BB : drop_begin(*G)) {  in eraseTail()
732 void MergeFunctions::writeThunk(Function *F, Function *G) {  in writeThunk()  argument
741                       << G->getName() << "()\n");  in writeThunk()
742     GEntryBlock = &G->getEntryBlock();  in writeThunk()
746                << G->getName() << "() {\n");  in writeThunk()
751     NewG = Function::Create(G->getFunctionType(), G->getLinkage(),  in writeThunk()
752                             G->getAddressSpace(), "", G->getParent());  in writeThunk()
753     NewG->setComdat(G->getComdat());  in writeThunk()
754     NewG->IsNewDbgInfoFormat = G->IsNewDbgInfoFormat;  in writeThunk()
759   Function *H = MergeFunctionsPDI ? G : NewG;  in writeThunk()
771                          G->getCallingConv() == CallingConv::SwiftTail;  in writeThunk()
783     DISubprogram *DIS = G->getSubprogram();  in writeThunk()
794                  << G->getName() << "()\n");  in writeThunk()
796     eraseTail(G);  in writeThunk()
800                << G->getName() << "()\n");  in writeThunk()
802     NewG->copyAttributesFrom(G);  in writeThunk()
803     NewG->takeName(G);  in writeThunk()
805     copyMetadataIfPresent(G, NewG, "type");  in writeThunk()
806     copyMetadataIfPresent(G, NewG, "kcfi_type");  in writeThunk()
807     removeUsers(G);  in writeThunk()
808     G->replaceAllUsesWith(NewG);  in writeThunk()
809     G->eraseFromParent();  in writeThunk()
828 void MergeFunctions::writeAlias(Function *F, Function *G) {  in writeAlias()  argument
829   PointerType *PtrType = G->getType();  in writeAlias()
830   auto *GA = GlobalAlias::create(G->getValueType(), PtrType->getAddressSpace(),  in writeAlias()
831                                  G->getLinkage(), "", F, G->getParent());  in writeAlias()
834   const MaybeAlign GAlign = G->getAlign();  in writeAlias()
839   GA->takeName(G);  in writeAlias()
840   GA->setVisibility(G->getVisibility());  in writeAlias()
843   removeUsers(G);  in writeAlias()
844   G->replaceAllUsesWith(GA);  in writeAlias()
845   G->eraseFromParent();  in writeAlias()
853 bool MergeFunctions::writeThunkOrAlias(Function *F, Function *G) {  in writeThunkOrAlias()  argument
854   if (canCreateAliasFor(G)) {  in writeThunkOrAlias()
855     writeAlias(F, G);  in writeThunkOrAlias()
859     writeThunk(F, G);  in writeThunkOrAlias()
866 void MergeFunctions::mergeTwoFunctions(Function *F, Function *G) {  in mergeTwoFunctions()  argument
868     assert(G->isInterposable());  in mergeTwoFunctions()
874         (!canCreateAliasFor(F) || !canCreateAliasFor(G)))  in mergeTwoFunctions()
892     const MaybeAlign GAlign = G->getAlign();  in mergeTwoFunctions()
894     writeThunkOrAlias(F, G);  in mergeTwoFunctions()
907     if (!G->isInterposable() && !MergeFunctionsPDI) {  in mergeTwoFunctions()
911       if (G->hasGlobalUnnamedAddr() && !Used.contains(G)) {  in mergeTwoFunctions()
914         GlobalNumbers.erase(G);  in mergeTwoFunctions()
916         removeUsers(G);  in mergeTwoFunctions()
917         G->replaceAllUsesWith(F);  in mergeTwoFunctions()
921         replaceDirectCallers(G, F);  in mergeTwoFunctions()
928     if (G->isDiscardableIfUnused() && G->use_empty() && !MergeFunctionsPDI) {  in mergeTwoFunctions()
929       G->eraseFromParent();  in mergeTwoFunctions()
934     if (writeThunkOrAlias(F, G)) {  in mergeTwoFunctions()
942                                            Function *G) {  in replaceFunctionInTree()  argument
944   assert(FunctionComparator(F, G, &GlobalNumbers).compare() == 0 &&  in replaceFunctionInTree()
949   assert(FNodesInTree.count(G) == 0 && "FNodesInTree should not contain G");  in replaceFunctionInTree()
955   FNodesInTree.insert({G, IterToFNInFnTree});  in replaceFunctionInTree()
957   FN.replaceBy(G);  in replaceFunctionInTree()
961 static bool isFuncOrderCorrect(const Function *F, const Function *G) {  in isFuncOrderCorrect()  argument
962   if (F->isInterposable() != G->isInterposable()) {  in isFuncOrderCorrect()
967   if (F->hasLocalLinkage() != G->hasLocalLinkage()) {  in isFuncOrderCorrect()
975   return F->getName() <= G->getName();  in isFuncOrderCorrect()