-//===-- 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.
//
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "Support/STLExtras.h"
+#include "Support/LeakDetector.h"
#include "SymbolTableListTraitsImpl.h"
#include <algorithm>
+#include <cstdarg>
+#include <iostream>
#include <map>
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// Methods to implement the globals and functions lists.
+//
Function *ilist_traits<Function>::createNode() {
- return new Function(FunctionType::get(Type::VoidTy,std::vector<const Type*>(),
- false), false);
+ FunctionType *FTy =
+ FunctionType::get(Type::VoidTy, std::vector<const Type*>(), false);
+ Function *Ret = new Function(FTy, GlobalValue::ExternalLinkage);
+ // This should not be garbage monitored.
+ LeakDetector::removeGarbageObject(Ret);
+ return Ret;
}
GlobalVariable *ilist_traits<GlobalVariable>::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<Function> &ilist_traits<Function>::getList(Module *M) {
// Explicit instantiations of SymbolTableListTraits since some of the methods
// are not in the public header file...
-template SymbolTableListTraits<GlobalVariable, Module, Module>;
-template SymbolTableListTraits<Function, Module, Module>;
+template class SymbolTableListTraits<GlobalVariable, Module, Module>;
+template class SymbolTableListTraits<Function, Module, Module>;
-// Define the GlobalValueRefMap as a struct that wraps a map so that we don't
-// have Module.h depend on <map>
+//===----------------------------------------------------------------------===//
+// Primitive Module methods.
//
-struct GlobalValueRefMap {
- typedef std::map<GlobalValue*, ConstantPointerRef*> MapTy;
- typedef MapTy::iterator iterator;
- std::map<GlobalValue*, ConstantPointerRef*> 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() {
GlobalList.setParent(0);
FunctionList.clear();
FunctionList.setParent(0);
+ LibraryList.clear();
delete SymTab;
}
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
//
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<Function>(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<const Type*> 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<Function>(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<const Type*> 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<Function>(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<GlobalVariable>(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<Type>(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!
}
+//===----------------------------------------------------------------------===//
+// 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() {
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));
-}