X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FModule.cpp;h=125fd123f8cf3d4d2c0ee2ab0bb000e6feaa4b97;hb=068758e518f0fe4ab67490f2eec0fd3b376a4d2c;hp=a895929280d9c280bf3799be02fddb735863e2a6;hpb=41661fdb2e963610b399c8ebe51a507847ef997d;p=oota-llvm.git diff --git a/lib/VMCore/Module.cpp b/lib/VMCore/Module.cpp index a895929280d..125fd123f8c 100644 --- a/lib/VMCore/Module.cpp +++ b/lib/VMCore/Module.cpp @@ -1,4 +1,11 @@ -//===-- Module.cpp - Implement the Module class ------------------*- C++ -*--=// +//===-- Module.cpp - Implement the Module class ---------------------------===// +// +// 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 Module class for the VMCore library. // @@ -9,16 +16,32 @@ #include "llvm/Constants.h" #include "llvm/DerivedTypes.h" #include "Support/STLExtras.h" +#include "Support/LeakDetector.h" #include "SymbolTableListTraitsImpl.h" #include +#include +#include #include +using namespace llvm; + +//===----------------------------------------------------------------------===// +// Methods to implement the globals and functions lists. +// Function *ilist_traits::createNode() { - return new Function(FunctionType::get(Type::VoidTy,std::vector(), - false), false); + FunctionType *FTy = + FunctionType::get(Type::VoidTy, std::vector(), false); + Function *Ret = new Function(FTy, GlobalValue::ExternalLinkage); + // This should not be garbage monitored. + LeakDetector::removeGarbageObject(Ret); + return Ret; } GlobalVariable *ilist_traits::createNode() { - return new GlobalVariable(Type::IntTy, false, false); + GlobalVariable *Ret = new GlobalVariable(Type::IntTy, false, + GlobalValue::ExternalLinkage); + // This should not be garbage monitored. + LeakDetector::removeGarbageObject(Ret); + return Ret; } iplist &ilist_traits::getList(Module *M) { @@ -30,26 +53,20 @@ iplist &ilist_traits::getList(Module *M) { // Explicit instantiations of SymbolTableListTraits since some of the methods // are not in the public header file... -template SymbolTableListTraits; -template SymbolTableListTraits; +template class SymbolTableListTraits; +template class SymbolTableListTraits; -// Define the GlobalValueRefMap as a struct that wraps a map so that we don't -// have Module.h depend on +//===----------------------------------------------------------------------===// +// Primitive Module methods. // -struct GlobalValueRefMap { - typedef std::map MapTy; - typedef MapTy::iterator iterator; - std::map Map; -}; - -Module::Module() { +Module::Module(const std::string &MID) + : ModuleID(MID), Endian(AnyEndianness), PtrSize(AnyPointerSize) { FunctionList.setItemParent(this); FunctionList.setParent(this); GlobalList.setItemParent(this); GlobalList.setParent(this); - GVRefMap = 0; - SymTab = 0; + SymTab = new SymbolTable(); } Module::~Module() { @@ -58,6 +75,7 @@ Module::~Module() { GlobalList.setParent(0); FunctionList.clear(); FunctionList.setParent(0); + LibraryList.clear(); delete SymTab; } @@ -66,25 +84,9 @@ void Module::dump() const { print(std::cerr); } -SymbolTable *Module::getSymbolTableSure() { - if (!SymTab) SymTab = new SymbolTable(0); - return SymTab; -} - -// hasSymbolTable() - Returns true if there is a symbol table allocated to -// this object AND if there is at least one name in it! +//===----------------------------------------------------------------------===// +// Methods for easy access to the functions in the module. // -bool Module::hasSymbolTable() const { - if (!SymTab) return false; - - for (SymbolTable::const_iterator I = SymTab->begin(), E = SymTab->end(); - I != E; ++I) - if (I->second.begin() != I->second.end()) - return true; // Found nonempty type plane! - - return false; -} - // getOrInsertFunction - Look up the specified function in the module symbol // table. If it does not exist, add a prototype for the function and return @@ -93,57 +95,174 @@ bool Module::hasSymbolTable() const { // Function *Module::getOrInsertFunction(const std::string &Name, const FunctionType *Ty) { - SymbolTable *SymTab = getSymbolTableSure(); + SymbolTable &SymTab = getSymbolTable(); // See if we have a definitions for the specified function already... - if (Value *V = SymTab->lookup(PointerType::get(Ty), Name)) { + if (Value *V = SymTab.lookup(PointerType::get(Ty), Name)) { return cast(V); // Yup, got it } else { // Nope, add one - Function *New = new Function(Ty, false, Name); + Function *New = new Function(Ty, GlobalVariable::ExternalLinkage, Name); FunctionList.push_back(New); return New; // Return the new prototype... } } +// getOrInsertFunction - Look up the specified function in the module symbol +// table. If it does not exist, add a prototype for the function and return it. +// This version of the method takes a null terminated list of function +// arguments, which makes it easier for clients to use. +// +Function *Module::getOrInsertFunction(const std::string &Name, + const Type *RetTy, ...) { + va_list Args; + va_start(Args, RetTy); + + // Build the list of argument types... + std::vector ArgTys; + while (const Type *ArgTy = va_arg(Args, const Type*)) + ArgTys.push_back(ArgTy); + + va_end(Args); + + // Build the function type and chain to the other getOrInsertFunction... + return getOrInsertFunction(Name, FunctionType::get(RetTy, ArgTys, false)); +} + + // getFunction - Look up the specified function in the module symbol table. // If it does not exist, return null. // Function *Module::getFunction(const std::string &Name, const FunctionType *Ty) { - SymbolTable *SymTab = getSymbolTable(); - if (SymTab == 0) return 0; // No symtab, no symbols... + SymbolTable &SymTab = getSymbolTable(); + return cast_or_null(SymTab.lookup(PointerType::get(Ty), Name)); +} + + +/// getMainFunction - This function looks up main efficiently. This is such a +/// common case, that it is a method in Module. If main cannot be found, a +/// null pointer is returned. +/// +Function *Module::getMainFunction() { + std::vector Params; + + // int main(void)... + if (Function *F = getFunction("main", FunctionType::get(Type::IntTy, + Params, false))) + return F; + + // void main(void)... + if (Function *F = getFunction("main", FunctionType::get(Type::VoidTy, + Params, false))) + return F; + + Params.push_back(Type::IntTy); + + // int main(int argc)... + if (Function *F = getFunction("main", FunctionType::get(Type::IntTy, + Params, false))) + return F; + + // void main(int argc)... + if (Function *F = getFunction("main", FunctionType::get(Type::VoidTy, + Params, false))) + return F; + + for (unsigned i = 0; i != 2; ++i) { // Check argv and envp + Params.push_back(PointerType::get(PointerType::get(Type::SByteTy))); + + // int main(int argc, char **argv)... + if (Function *F = getFunction("main", FunctionType::get(Type::IntTy, + Params, false))) + return F; + + // void main(int argc, char **argv)... + if (Function *F = getFunction("main", FunctionType::get(Type::VoidTy, + Params, false))) + return F; + } + + // Ok, try to find main the hard way... + return getNamedFunction("main"); +} - return cast_or_null(SymTab->lookup(PointerType::get(Ty), Name)); +/// getNamedFunction - Return the first function in the module with the +/// specified name, of arbitrary type. This method returns null if a function +/// with the specified name is not found. +/// +Function *Module::getNamedFunction(const std::string &Name) { + // Loop over all of the functions, looking for the function desired + Function *Found = 0; + for (iterator I = begin(), E = end(); I != E; ++I) + if (I->getName() == Name) + if (I->isExternal()) + Found = I; + else + return I; + return Found; // Non-external function not found... } +//===----------------------------------------------------------------------===// +// Methods for easy access to the global variables in the module. +// + +/// getGlobalVariable - Look up the specified global variable in the module +/// symbol table. If it does not exist, return null. Note that this only +/// returns a global variable if it does not have internal linkage. The type +/// argument should be the underlying type of the global, ie, it should not +/// have the top-level PointerType, which represents the address of the +/// global. +/// +GlobalVariable *Module::getGlobalVariable(const std::string &Name, + const Type *Ty) { + if (Value *V = getSymbolTable().lookup(PointerType::get(Ty), Name)) { + GlobalVariable *Result = cast(V); + if (!Result->hasInternalLinkage()) + return Result; + } + return 0; +} + + + +//===----------------------------------------------------------------------===// +// Methods for easy access to the types in the module. +// + + // addTypeName - Insert an entry in the symbol table mapping Str to Type. If // there is already an entry for this name, true is returned and the symbol // table is not modified. // bool Module::addTypeName(const std::string &Name, const Type *Ty) { - SymbolTable *ST = getSymbolTableSure(); + SymbolTable &ST = getSymbolTable(); - if (ST->lookup(Type::TypeTy, Name)) return true; // Already in symtab... + if (ST.lookupType(Name)) return true; // Already in symtab... // Not in symbol table? Set the name with the Symtab as an argument so the // type knows what to update... - ((Value*)Ty)->setName(Name, ST); + ST.insert(Name, Ty); return false; } +/// getTypeByName - Return the type with the specified name in this module, or +/// null if there is none by that name. +const Type *Module::getTypeByName(const std::string &Name) const { + const SymbolTable &ST = getSymbolTable(); + return cast_or_null(ST.lookupType(Name)); +} + // getTypeName - If there is at least one entry in the symbol table for the // specified type, return it. // -std::string Module::getTypeName(const Type *Ty) { - const SymbolTable *ST = getSymbolTable(); - if (ST == 0) return ""; // No symbol table, must not have an entry... - if (ST->find(Type::TypeTy) == ST->end()) - return ""; // No names for types... +std::string Module::getTypeName(const Type *Ty) const { + const SymbolTable &ST = getSymbolTable(); - SymbolTable::type_const_iterator TI = ST->type_begin(Type::TypeTy); - SymbolTable::type_const_iterator TE = ST->type_end(Type::TypeTy); + SymbolTable::type_const_iterator TI = ST.type_begin(); + SymbolTable::type_const_iterator TE = ST.type_end(); + if ( TI == TE ) return ""; // No names for types - while (TI != TE && TI->second != (const Value*)Ty) + while (TI != TE && TI->second != Ty) ++TI; if (TI != TE) // Must have found an entry! @@ -152,11 +271,16 @@ std::string Module::getTypeName(const Type *Ty) { } +//===----------------------------------------------------------------------===// +// Other module related stuff. +// + + // dropAllReferences() - This function causes all the subelementss to "let go" // of all references that they are maintaining. This allows one to 'delete' a // whole module 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 delete'd for real. Note that no operations are valid on an object that +// is deleted for real. Note that no operations are valid on an object that // has "dropped all references", except operator delete. // void Module::dropAllReferences() { @@ -165,51 +289,5 @@ void Module::dropAllReferences() { for(Module::giterator I = gbegin(), E = gend(); I != E; ++I) I->dropAllReferences(); - - // If there are any GlobalVariable references still out there, nuke them now. - // Since all references are hereby dropped, nothing could possibly reference - // them still. Note that destroying all of the constant pointer refs will - // eventually cause the GVRefMap field to be set to null (by - // destroyConstantPointerRef, below). - // - while (GVRefMap) - // Delete the ConstantPointerRef node... - GVRefMap->Map.begin()->second->destroyConstant(); -} - -// Accessor for the underlying GlobalValRefMap... -ConstantPointerRef *Module::getConstantPointerRef(GlobalValue *V){ - // Create ref map lazily on demand... - if (GVRefMap == 0) GVRefMap = new GlobalValueRefMap(); - - GlobalValueRefMap::iterator I = GVRefMap->Map.find(V); - if (I != GVRefMap->Map.end()) return I->second; - - ConstantPointerRef *Ref = new ConstantPointerRef(V); - GVRefMap->Map[V] = Ref; - return Ref; } -void Module::destroyConstantPointerRef(ConstantPointerRef *CPR) { - assert(GVRefMap && "No map allocated, but we have a CPR?"); - if (!GVRefMap->Map.erase(CPR->getValue())) // Remove it from the map... - assert(0 && "ConstantPointerRef not found in module CPR map!"); - - if (GVRefMap->Map.empty()) { // If the map is empty, delete it. - delete GVRefMap; - GVRefMap = 0; - } -} - -void Module::mutateConstantPointerRef(GlobalValue *OldGV, GlobalValue *NewGV) { - GlobalValueRefMap::iterator I = GVRefMap->Map.find(OldGV); - assert(I != GVRefMap->Map.end() && - "mutateConstantPointerRef; OldGV not in table!"); - ConstantPointerRef *Ref = I->second; - - // Remove the old entry... - GVRefMap->Map.erase(I); - - // Insert the new entry... - GVRefMap->Map.insert(std::make_pair(NewGV, Ref)); -}