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//===- llvm/PassRegistry.h - Pass Information Registry ----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines PassRegistry, a class that is used in the initialization
// and registration of passes. At application startup, passes are registered
// with the PassRegistry, which is later provided to the PassManager for
// dependency resolution and similar tasks.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_PASSREGISTRY_H
#define LLVM_PASSREGISTRY_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/RWMutex.h"
#include <memory>
#include <vector>
namespace llvm {
class PassInfo;
struct PassRegistrationListener;
/// PassRegistry - This class manages the registration and intitialization of
/// the pass subsystem as application startup, and assists the PassManager
/// in resolving pass dependencies.
/// NOTE: PassRegistry is NOT thread-safe. If you want to use LLVM on multiple
/// threads simultaneously, you will need to use a separate PassRegistry on
/// each thread.
class PassRegistry {
mutable sys::SmartRWMutex<true> Lock;
/// PassInfoMap - Keep track of the PassInfo object for each registered pass.
using MapType = DenseMap<const void *, const PassInfo *>;
MapType PassInfoMap;
using StringMapType = StringMap<const PassInfo *>;
StringMapType PassInfoStringMap;
std::vector<std::unique_ptr<const PassInfo>> ToFree;
std::vector<PassRegistrationListener *> Listeners;
public:
PassRegistry() = default;
~PassRegistry();
/// getPassRegistry - Access the global registry object, which is
/// automatically initialized at application launch and destroyed by
/// llvm_shutdown.
static PassRegistry *getPassRegistry();
/// getPassInfo - Look up a pass' corresponding PassInfo, indexed by the pass'
/// type identifier (&MyPass::ID).
const PassInfo *getPassInfo(const void *TI) const;
/// getPassInfo - Look up a pass' corresponding PassInfo, indexed by the pass'
/// argument string.
const PassInfo *getPassInfo(StringRef Arg) const;
/// registerPass - Register a pass (by means of its PassInfo) with the
/// registry. Required in order to use the pass with a PassManager.
void registerPass(const PassInfo &PI, bool ShouldFree = false);
/// registerAnalysisGroup - Register an analysis group (or a pass implementing
// an analysis group) with the registry. Like registerPass, this is required
// in order for a PassManager to be able to use this group/pass.
void registerAnalysisGroup(const void *InterfaceID, const void *PassID,
PassInfo &Registeree, bool isDefault,
bool ShouldFree = false);
/// enumerateWith - Enumerate the registered passes, calling the provided
/// PassRegistrationListener's passEnumerate() callback on each of them.
void enumerateWith(PassRegistrationListener *L);
/// addRegistrationListener - Register the given PassRegistrationListener
/// to receive passRegistered() callbacks whenever a new pass is registered.
void addRegistrationListener(PassRegistrationListener *L);
/// removeRegistrationListener - Unregister a PassRegistrationListener so that
/// it no longer receives passRegistered() callbacks.
void removeRegistrationListener(PassRegistrationListener *L);
};
} // end namespace llvm
#endif // LLVM_PASSREGISTRY_H
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