X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FModule.cpp;h=275d4cfbf31a6907acb4d25993629fd94f4a9c15;hb=9aa263937051d14adc4b552db358e2c3dc938921;hp=7fa2802679ab715877a467760b9f886fc94c4d51;hpb=7fc9fe34390c66ca58646d09a87f7dbaacb6c1f8;p=oota-llvm.git diff --git a/lib/VMCore/Module.cpp b/lib/VMCore/Module.cpp index 7fa2802679a..275d4cfbf31 100644 --- a/lib/VMCore/Module.cpp +++ b/lib/VMCore/Module.cpp @@ -4,39 +4,271 @@ // //===----------------------------------------------------------------------===// -#include "llvm/ValueHolderImpl.h" -#include "llvm/InstrTypes.h" -#include "llvm/BasicBlock.h" -#include "llvm/Method.h" #include "llvm/Module.h" +#include "llvm/InstrTypes.h" +#include "llvm/Constants.h" +#include "llvm/DerivedTypes.h" +#include "Support/STLExtras.h" +#include "Support/LeakDetector.h" +#include "SymbolTableListTraitsImpl.h" +#include +#include + +Function *ilist_traits::createNode() { + 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() { + 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) { + return M->getFunctionList(); +} +iplist &ilist_traits::getList(Module *M) { + return M->getGlobalList(); +} -// Instantiate Templates - This ugliness is the price we have to pay -// for having a DefHolderImpl.h file seperate from DefHolder.h! :( +// Explicit instantiations of SymbolTableListTraits since some of the methods +// are not in the public header file... +template SymbolTableListTraits; +template SymbolTableListTraits; + +// Define the GlobalValueRefMap as a struct that wraps a map so that we don't +// have Module.h depend on // -template class ValueHolder; +struct GlobalValueRefMap { + typedef std::map MapTy; + typedef MapTy::iterator iterator; + std::map Map; +}; + -Module::Module() - : SymTabValue(0/*TODO: REAL TYPE*/, Value::ModuleVal, ""), - MethodList(this, this) { +Module::Module(const std::string &MID) + : ModuleID(MID), Endian(BigEndian), PtrSize(Pointer64) { + FunctionList.setItemParent(this); + FunctionList.setParent(this); + GlobalList.setItemParent(this); + GlobalList.setParent(this); + GVRefMap = 0; + SymTab = new SymbolTable(); } Module::~Module() { dropAllReferences(); - MethodList.delete_all(); - MethodList.setParent(0); + GlobalList.clear(); + GlobalList.setParent(0); + FunctionList.clear(); + FunctionList.setParent(0); + delete SymTab; +} + +// Module::dump() - Allow printing from debugger +void Module::dump() const { + print(std::cerr); } +// 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 is nice because it allows most passes to get away with not handling +// the symbol table directly for this common task. +// +Function *Module::getOrInsertFunction(const std::string &Name, + const FunctionType *Ty) { + SymbolTable &SymTab = getSymbolTable(); + + // See if we have a definitions for the specified function already... + if (Value *V = SymTab.lookup(PointerType::get(Ty), Name)) { + return cast(V); // Yup, got it + } else { // Nope, add one + Function *New = new Function(Ty, GlobalVariable::ExternalLinkage, Name); + FunctionList.push_back(New); + return New; // Return the new prototype... + } +} -// 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 delete'd for real. Note that no operations are -// valid on an object that has "dropped all references", except operator -// delete. +// 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(); + return cast_or_null(SymTab.lookup(PointerType::get(Ty), Name)); +} + +// 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 = getSymbolTable(); + + if (ST.lookup(Type::TypeTy, 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); + + return false; +} + +/// 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"); +} + +/// 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 + for (iterator I = begin(), E = end(); I != E; ++I) + if (I->getName() == Name) + return I; + return 0; // function not found... +} + + + +// 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.find(Type::TypeTy) == ST.end()) + return ""; // No names for types... + + SymbolTable::type_const_iterator TI = ST.type_begin(Type::TypeTy); + SymbolTable::type_const_iterator TE = ST.type_end(Type::TypeTy); + + while (TI != TE && TI->second != (const Value*)Ty) + ++TI; + + if (TI != TE) // Must have found an entry! + return TI->first; + return ""; // Must not have found anything... +} + + +// 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 +// has "dropped all references", except operator delete. // void Module::dropAllReferences() { - MethodListType::iterator MI = MethodList.begin(); - for (; MI != MethodList.end(); ++MI) - (*MI)->dropAllReferences(); + for(Module::iterator I = begin(), E = end(); I != E; ++I) + I->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) { + assert(OldGV != NewGV && "Cannot mutate to the same global!"); + 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); + + // Check to see if a CPR already exists for NewGV + I = GVRefMap->Map.lower_bound(NewGV); + + if (I == GVRefMap->Map.end() || I->first != NewGV) { + // Insert the new entry... + GVRefMap->Map.insert(I, std::make_pair(NewGV, Ref)); + } else { + // Otherwise, an entry already exists for the current global value. + // Completely replace the old CPR with the existing one... + Ref->replaceAllUsesWith(I->second); + delete Ref; + } }