//===- PassManager.cpp - LLVM Pass Infrastructure Implementation ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Devang Patel and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the LLVM Pass Manager infrastructure.
//
//===----------------------------------------------------------------------===//
#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Timer.h"
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/Support/Streams.h"
#include "llvm/Support/ManagedStatic.h"
#include <vector>
#include <map>
using namespace llvm;
//===----------------------------------------------------------------------===//
// Overview:
// The Pass Manager Infrastructure manages passes. It's responsibilities are:
//
// o Manage optimization pass execution order
// o Make required Analysis information available before pass P is run
// o Release memory occupied by dead passes
// o If Analysis information is dirtied by a pass then regenerate Analysis
// information before it is consumed by another pass.
//
// Pass Manager Infrastructure uses multiple pass managers. They are
// PassManager, FunctionPassManager, ModulePassManager, BasicBlockPassManager.
// This class hierarcy uses multiple inheritance but pass managers do not derive
// from another pass manager.
//
// PassManager
