1 //===- PassRegistry.cpp - Pass Registration Implementation ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the PassRegistry, with which passes are registered on
11 // initialization, and supports the PassManager in dependency resolution.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/PassRegistry.h"
16 #include "llvm/IR/Function.h"
17 #include "llvm/PassSupport.h"
18 #include "llvm/Support/Compiler.h"
19 #include "llvm/Support/ManagedStatic.h"
20 #include "llvm/Support/RWMutex.h"
25 // FIXME: We use ManagedStatic to erase the pass registrar on shutdown.
26 // Unfortunately, passes are registered with static ctors, and having
27 // llvm_shutdown clear this map prevents successful resurrection after
28 // llvm_shutdown is run. Ideally we should find a solution so that we don't
29 // leak the map, AND can still resurrect after shutdown.
30 static ManagedStatic<PassRegistry> PassRegistryObj;
31 PassRegistry *PassRegistry::getPassRegistry() {
32 return &*PassRegistryObj;
35 //===----------------------------------------------------------------------===//
39 PassRegistry::~PassRegistry() {
42 const PassInfo *PassRegistry::getPassInfo(const void *TI) const {
43 sys::SmartScopedReader<true> Guard(Lock);
44 MapType::const_iterator I = PassInfoMap.find(TI);
45 return I != PassInfoMap.end() ? I->second : nullptr;
48 const PassInfo *PassRegistry::getPassInfo(StringRef Arg) const {
49 sys::SmartScopedReader<true> Guard(Lock);
50 StringMapType::const_iterator I = PassInfoStringMap.find(Arg);
51 return I != PassInfoStringMap.end() ? I->second : nullptr;
54 //===----------------------------------------------------------------------===//
55 // Pass Registration mechanism
58 void PassRegistry::registerPass(const PassInfo &PI, bool ShouldFree) {
59 sys::SmartScopedWriter<true> Guard(Lock);
61 PassInfoMap.insert(std::make_pair(PI.getTypeInfo(),&PI)).second;
62 assert(Inserted && "Pass registered multiple times!");
64 PassInfoStringMap[PI.getPassArgument()] = &PI;
66 // Notify any listeners.
67 for (std::vector<PassRegistrationListener*>::iterator
68 I = Listeners.begin(), E = Listeners.end(); I != E; ++I)
69 (*I)->passRegistered(&PI);
71 if (ShouldFree) ToFree.push_back(std::unique_ptr<const PassInfo>(&PI));
74 void PassRegistry::unregisterPass(const PassInfo &PI) {
75 sys::SmartScopedWriter<true> Guard(Lock);
76 MapType::iterator I = PassInfoMap.find(PI.getTypeInfo());
77 assert(I != PassInfoMap.end() && "Pass registered but not in map!");
79 // Remove pass from the map.
81 PassInfoStringMap.erase(PI.getPassArgument());
84 void PassRegistry::enumerateWith(PassRegistrationListener *L) {
85 sys::SmartScopedReader<true> Guard(Lock);
86 for (auto I = PassInfoMap.begin(), E = PassInfoMap.end(); I != E; ++I)
87 L->passEnumerate(I->second);
91 /// Analysis Group Mechanisms.
92 void PassRegistry::registerAnalysisGroup(const void *InterfaceID,
97 PassInfo *InterfaceInfo = const_cast<PassInfo*>(getPassInfo(InterfaceID));
99 // First reference to Interface, register it now.
100 registerPass(Registeree);
101 InterfaceInfo = &Registeree;
103 assert(Registeree.isAnalysisGroup() &&
104 "Trying to join an analysis group that is a normal pass!");
107 PassInfo *ImplementationInfo = const_cast<PassInfo*>(getPassInfo(PassID));
108 assert(ImplementationInfo &&
109 "Must register pass before adding to AnalysisGroup!");
111 sys::SmartScopedWriter<true> Guard(Lock);
113 // Make sure we keep track of the fact that the implementation implements
115 ImplementationInfo->addInterfaceImplemented(InterfaceInfo);
117 AnalysisGroupInfo &AGI = AnalysisGroupInfoMap[InterfaceInfo];
118 assert(AGI.Implementations.count(ImplementationInfo) == 0 &&
119 "Cannot add a pass to the same analysis group more than once!");
120 AGI.Implementations.insert(ImplementationInfo);
122 assert(InterfaceInfo->getNormalCtor() == nullptr &&
123 "Default implementation for analysis group already specified!");
124 assert(ImplementationInfo->getNormalCtor() &&
125 "Cannot specify pass as default if it does not have a default ctor");
126 InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
127 InterfaceInfo->setTargetMachineCtor(
128 ImplementationInfo->getTargetMachineCtor());
133 ToFree.push_back(std::unique_ptr<const PassInfo>(&Registeree));
136 void PassRegistry::addRegistrationListener(PassRegistrationListener *L) {
137 sys::SmartScopedWriter<true> Guard(Lock);
138 Listeners.push_back(L);
141 void PassRegistry::removeRegistrationListener(PassRegistrationListener *L) {
142 sys::SmartScopedWriter<true> Guard(Lock);
144 auto I = std::find(Listeners.begin(), Listeners.end(), L);