| //===-- Function.cpp - Implement the Global object classes ----------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the Function & GlobalVariable classes for the VMCore |
| // library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Module.h" |
| #include "llvm/DerivedTypes.h" |
| #include "llvm/IntrinsicInst.h" |
| #include "llvm/Support/LeakDetector.h" |
| #include "SymbolTableListTraitsImpl.h" |
| #include "llvm/ADT/StringExtras.h" |
| using namespace llvm; |
| |
| BasicBlock *ilist_traits<BasicBlock>::createSentinel() { |
| BasicBlock *Ret = new BasicBlock(); |
| // This should not be garbage monitored. |
| LeakDetector::removeGarbageObject(Ret); |
| return Ret; |
| } |
| |
| iplist<BasicBlock> &ilist_traits<BasicBlock>::getList(Function *F) { |
| return F->getBasicBlockList(); |
| } |
| |
| Argument *ilist_traits<Argument>::createSentinel() { |
| Argument *Ret = new Argument(Type::IntTy); |
| // This should not be garbage monitored. |
| LeakDetector::removeGarbageObject(Ret); |
| return Ret; |
| } |
| |
| iplist<Argument> &ilist_traits<Argument>::getList(Function *F) { |
| return F->getArgumentList(); |
| } |
| |
| // Explicit instantiations of SymbolTableListTraits since some of the methods |
| // are not in the public header file... |
| template class SymbolTableListTraits<Argument, Function, Function>; |
| template class SymbolTableListTraits<BasicBlock, Function, Function>; |
| |
| //===----------------------------------------------------------------------===// |
| // Argument Implementation |
| //===----------------------------------------------------------------------===// |
| |
| Argument::Argument(const Type *Ty, const std::string &Name, Function *Par) |
| : Value(Ty, Value::ArgumentVal, Name) { |
| Parent = 0; |
| |
| // Make sure that we get added to a function |
| LeakDetector::addGarbageObject(this); |
| |
| if (Par) |
| Par->getArgumentList().push_back(this); |
| } |
| |
| void Argument::setParent(Function *parent) { |
| if (getParent()) |
| LeakDetector::addGarbageObject(this); |
| Parent = parent; |
| if (getParent()) |
| LeakDetector::removeGarbageObject(this); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Function Implementation |
| //===----------------------------------------------------------------------===// |
| |
| Function::Function(const FunctionType *Ty, LinkageTypes Linkage, |
| const std::string &name, Module *ParentModule) |
| : GlobalValue(PointerType::get(Ty), Value::FunctionVal, 0, 0, Linkage, name) { |
| CallingConvention = 0; |
| BasicBlocks.setItemParent(this); |
| BasicBlocks.setParent(this); |
| ArgumentList.setItemParent(this); |
| ArgumentList.setParent(this); |
| SymTab = new SymbolTable(); |
| |
| assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy) |
| && "LLVM functions cannot return aggregate values!"); |
| |
| // Create the arguments vector, all arguments start out unnamed. |
| for (unsigned i = 0, e = Ty->getNumParams(); i != e; ++i) { |
| assert(Ty->getParamType(i) != Type::VoidTy && |
| "Cannot have void typed arguments!"); |
| ArgumentList.push_back(new Argument(Ty->getParamType(i))); |
| } |
| |
| // Make sure that we get added to a function |
| LeakDetector::addGarbageObject(this); |
| |
| if (ParentModule) |
| ParentModule->getFunctionList().push_back(this); |
| } |
| |
| Function::~Function() { |
| dropAllReferences(); // After this it is safe to delete instructions. |
| |
| // Delete all of the method arguments and unlink from symbol table... |
| ArgumentList.clear(); |
| ArgumentList.setParent(0); |
| delete SymTab; |
| } |
| |
| void Function::setParent(Module *parent) { |
| if (getParent()) |
| LeakDetector::addGarbageObject(this); |
| Parent = parent; |
| if (getParent()) |
| LeakDetector::removeGarbageObject(this); |
| } |
| |
| const FunctionType *Function::getFunctionType() const { |
| return cast<FunctionType>(getType()->getElementType()); |
| } |
| |
| bool Function::isVarArg() const { |
| return getFunctionType()->isVarArg(); |
| } |
| |
| const Type *Function::getReturnType() const { |
| return getFunctionType()->getReturnType(); |
| } |
| |
| void Function::removeFromParent() { |
| getParent()->getFunctionList().remove(this); |
| } |
| |
| void Function::eraseFromParent() { |
| getParent()->getFunctionList().erase(this); |
| } |
| |
| |
| /// renameLocalSymbols - This method goes through the Function's symbol table |
| /// and renames any symbols that conflict with symbols at global scope. This is |
| /// required before printing out to a textual form, to ensure that there is no |
| /// ambiguity when parsing. |
| void Function::renameLocalSymbols() { |
| SymbolTable &LST = getSymbolTable(); // Local Symtab |
| SymbolTable &GST = getParent()->getSymbolTable(); // Global Symtab |
| |
| for (SymbolTable::plane_iterator LPI = LST.plane_begin(), E = LST.plane_end(); |
| LPI != E; ++LPI) |
| // All global symbols are of pointer type, ignore any non-pointer planes. |
| if (const PointerType *CurTy = dyn_cast<PointerType>(LPI->first)) { |
| // Only check if the global plane has any symbols of this type. |
| SymbolTable::plane_iterator GPI = GST.find(LPI->first); |
| if (GPI != GST.plane_end()) { |
| SymbolTable::ValueMap &LVM = LPI->second; |
| const SymbolTable::ValueMap &GVM = GPI->second; |
| |
| // Loop over all local symbols, renaming those that are in the global |
| // symbol table already. |
| for (SymbolTable::value_iterator VI = LVM.begin(), E = LVM.end(); |
| VI != E;) { |
| Value *V = VI->second; |
| const std::string &Name = VI->first; |
| ++VI; |
| if (GVM.count(Name)) { |
| static unsigned UniqueNum = 0; |
| // Find a name that does not conflict! |
| while (GVM.count(Name + "_" + utostr(++UniqueNum)) || |
| LVM.count(Name + "_" + utostr(UniqueNum))) |
| /* scan for UniqueNum that works */; |
| V->setName(Name + "_" + utostr(UniqueNum)); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| // dropAllReferences() - This function causes all the subinstructions to "let |
| // go" of all references that they are maintaining. This allows one to |
| // 'delete' a whole class at a time, even though there may be circular |
| // references... first all references are dropped, and all use counts go to |
| // zero. Then everything is deleted for real. Note that no operations are |
| // valid on an object that has "dropped all references", except operator |
| // delete. |
| // |
| void Function::dropAllReferences() { |
| for (iterator I = begin(), E = end(); I != E; ++I) |
| I->dropAllReferences(); |
| BasicBlocks.clear(); // Delete all basic blocks... |
| } |
| |
| /// getIntrinsicID - This method returns the ID number of the specified |
| /// function, or Intrinsic::not_intrinsic if the function is not an |
| /// intrinsic, or if the pointer is null. This value is always defined to be |
| /// zero to allow easy checking for whether a function is intrinsic or not. The |
| /// particular intrinsic functions which correspond to this value are defined in |
| /// llvm/Intrinsics.h. |
| /// |
| unsigned Function::getIntrinsicID() const { |
| const std::string& Name = this->getName(); |
| if (Name.size() < 5 || Name[4] != '.' || Name[0] != 'l' || Name[1] != 'l' |
| || Name[2] != 'v' || Name[3] != 'm') |
| return 0; // All intrinsics start with 'llvm.' |
| |
| assert(Name.size() != 5 && "'llvm.' is an invalid intrinsic name!"); |
| |
| #define GET_FUNCTION_RECOGNIZER |
| #include "llvm/Intrinsics.gen" |
| #undef GET_FUNCTION_RECOGNIZER |
| return 0; |
| } |
| |
| const char *Intrinsic::getName(ID id) { |
| assert(id < num_intrinsics && "Invalid intrinsic ID!"); |
| const char * const Table[] = { |
| "not_intrinsic", |
| #define GET_INTRINSIC_NAME_TABLE |
| #include "llvm/Intrinsics.gen" |
| #undef GET_INTRINSIC_NAME_TABLE |
| }; |
| return Table[id]; |
| } |
| |
| Value *IntrinsicInst::StripPointerCasts(Value *Ptr) { |
| if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ptr)) { |
| if (CE->getOpcode() == Instruction::Cast) { |
| if (isa<PointerType>(CE->getOperand(0)->getType())) |
| return StripPointerCasts(CE->getOperand(0)); |
| } else if (CE->getOpcode() == Instruction::GetElementPtr) { |
| for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i) |
| if (!CE->getOperand(i)->isNullValue()) |
| return Ptr; |
| return StripPointerCasts(CE->getOperand(0)); |
| } |
| return Ptr; |
| } |
| |
| if (CastInst *CI = dyn_cast<CastInst>(Ptr)) { |
| if (isa<PointerType>(CI->getOperand(0)->getType())) |
| return StripPointerCasts(CI->getOperand(0)); |
| } else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr)) { |
| for (unsigned i = 1, e = GEP->getNumOperands(); i != e; ++i) |
| if (!isa<Constant>(GEP->getOperand(i)) || |
| !cast<Constant>(GEP->getOperand(i))->isNullValue()) |
| return Ptr; |
| return StripPointerCasts(GEP->getOperand(0)); |
| } |
| return Ptr; |
| } |
| |
| // vim: sw=2 ai |