reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
//===- llvm/PassRegistry.h - Pass Information Registry ----------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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/CBindingWrapping.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);
};

// Create wrappers for C Binding types (see CBindingWrapping.h).
DEFINE_STDCXX_CONVERSION_FUNCTIONS(PassRegistry, LLVMPassRegistryRef)

} // end namespace llvm

#endif // LLVM_PASSREGISTRY_H