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//===-- Module.cpp - Implement the Module class ------------------*- C++ -*--=//
//
// This file implements the Module class for the VMCore library.
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/Method.h"
#include "llvm/GlobalVariable.h"
#include "llvm/BasicBlock.h"
#include "llvm/InstrTypes.h"
#include "llvm/ValueHolderImpl.h"
#include "llvm/Support/STLExtras.h"
#include "llvm/Type.h"
#include <map>
// Instantiate Templates - This ugliness is the price we have to pay
// for having a DefHolderImpl.h file seperate from DefHolder.h! :(
//
template class ValueHolder<GlobalVariable, Module, Module>;
template class ValueHolder<Method, Module, Module>;
// Define the GlobalValueRefMap as a struct that wraps a map so that we don't
// have Module.h depend on <map>
//
struct GlobalValueRefMap : public map<GlobalValue*, ConstPoolPointerRef*>{
};
Module::Module()
: Value(Type::VoidTy, Value::ModuleVal, ""), SymTabValue(this),
GlobalList(this, this), MethodList(this, this), GVRefMap(0) {
}
Module::~Module() {
dropAllReferences();
GlobalList.delete_all();
GlobalList.setParent(0);
MethodList.delete_all();
MethodList.setParent(0);
}
// 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.
//
void Module::dropAllReferences() {
for_each(MethodList.begin(), MethodList.end(),
std::mem_fun(&Method::dropAllReferences));
for_each(GlobalList.begin(), GlobalList.end(),
std::mem_fun(&GlobalVariable::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.
if (GVRefMap) {
for (GlobalValueRefMap::iterator I = GVRefMap->begin(), E = GVRefMap->end();
I != E; ++I) {
// Delete the ConstPoolPointerRef node...
I->second->destroyConstant();
}
// Since the table is empty, we can now delete it...
delete GVRefMap;
}
}
// reduceApply - Apply the specified function to all of the methods in this
// module. The result values are or'd together and the result is returned.
//
bool Module::reduceApply(bool (*Func)(GlobalVariable*)) {
return reduce_apply_bool(gbegin(), gend(), Func);
}
bool Module::reduceApply(bool (*Func)(const GlobalVariable*)) const {
return reduce_apply_bool(gbegin(), gend(), Func);
}
bool Module::reduceApply(bool (*Func)(Method*)) {
return reduce_apply_bool(begin(), end(), Func);
}
bool Module::reduceApply(bool (*Func)(const Method*)) const {
return reduce_apply_bool(begin(), end(), Func);
}
// Accessor for the underlying GlobalValRefMap...
ConstPoolPointerRef *Module::getConstPoolPointerRef(GlobalValue *V){
// Create ref map lazily on demand...
if (GVRefMap == 0) GVRefMap = new GlobalValueRefMap();
GlobalValueRefMap::iterator I = GVRefMap->find(V);
if (I != GVRefMap->end()) return I->second;
ConstPoolPointerRef *Ref = new ConstPoolPointerRef(V);
GVRefMap->insert(make_pair(V, Ref));
return Ref;
}
void Module::mutateConstPoolPointerRef(GlobalValue *OldGV, GlobalValue *NewGV) {
GlobalValueRefMap::iterator I = GVRefMap->find(OldGV);
assert(I != GVRefMap->end() &&
"mutateConstPoolPointerRef; OldGV not in table!");
ConstPoolPointerRef *Ref = I->second;
// Remove the old entry...
GVRefMap->erase(I);
// Insert the new entry...
GVRefMap->insert(make_pair(NewGV, Ref));
}
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