-//===-- 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/InstrTypes.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
-#include "Support/STLExtras.h"
-#include "Support/LeakDetector.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/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() {
+Function *ilist_traits<Function>::createSentinel() {
FunctionType *FTy =
FunctionType::get(Type::VoidTy, std::vector<const Type*>(), false);
Function *Ret = new Function(FTy, GlobalValue::ExternalLinkage);
LeakDetector::removeGarbageObject(Ret);
return Ret;
}
-GlobalVariable *ilist_traits<GlobalVariable>::createNode() {
+GlobalVariable *ilist_traits<GlobalVariable>::createSentinel() {
GlobalVariable *Ret = new GlobalVariable(Type::IntTy, false,
GlobalValue::ExternalLinkage);
// This should not be garbage monitored.
}
// 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>;
+// are not in the public header file.
+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 = new SymbolTable();
}
GlobalList.setParent(0);
FunctionList.clear();
FunctionList.setParent(0);
+ LibraryList.clear();
delete SymTab;
}
print(std::cerr);
}
+//===----------------------------------------------------------------------===//
+// Methods for easy access to the functions in the module.
+//
+
// 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
}
}
+// 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.
//
return cast_or_null<Function>(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
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)))
///
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. The type argument
+/// should be the underlying type of the global, i.e., it should not have
+/// the top-level PointerType, which represents the address of the global.
+/// If AllowInternal is set to true, this function will return types that
+/// have InternalLinkage. By default, these types are not returned.
+///
+GlobalVariable *Module::getGlobalVariable(const std::string &Name,
+ const Type *Ty, bool AllowInternal) {
+ if (Value *V = getSymbolTable().lookup(PointerType::get(Ty), Name)) {
+ GlobalVariable *Result = cast<GlobalVariable>(V);
+ if (AllowInternal || !Result->hasInternalLinkage())
+ return Result;
+ }
+ return 0;
+}
+
+/// getNamedGlobal - Return the first global variable in the module with the
+/// specified name, of arbitrary type. This method returns null if a global
+/// with the specified name is not found.
+///
+GlobalVariable *Module::getNamedGlobal(const std::string &Name) {
+ // FIXME: This would be much faster with a symbol table that doesn't
+ // discriminate based on type!
+ for (global_iterator I = global_begin(), E = global_end();
+ I != E; ++I)
+ if (I->getName() == Name)
return I;
- return 0; // function not found...
+ 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 = getSymbolTable();
+
+ 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...
+ 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) {
+std::string Module::getTypeName(const Type *Ty) const {
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);
+ 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!
return ""; // Must not have found anything...
}
+//===----------------------------------------------------------------------===//
+// 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::iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();
- for(Module::giterator I = gbegin(), E = gend(); I != E; ++I)
+ for(Module::global_iterator I = global_begin(), E = global_end(); 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));
-}
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