//===----------------------------------------------------------------------===//
#include "llvm/PassRegistry.h"
+#include "llvm/PassSupport.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Mutex.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Function.h"
+#include <vector>
-static PassRegistry *PassRegistryObj = 0;
+using namespace llvm;
+
+// FIXME: We use ManagedStatic to erase the pass registrar on shutdown.
+// Unfortunately, passes are registered with static ctors, and having
+// llvm_shutdown clear this map prevents successful resurrection after
+// llvm_shutdown is run. Ideally we should find a solution so that we don't
+// leak the map, AND can still resurrect after shutdown.
+static ManagedStatic<PassRegistry> PassRegistryObj;
PassRegistry *PassRegistry::getPassRegistry() {
- // Use double-checked locking to safely initialize the registrar when
- // we're running in multithreaded mode.
- PassRegistry* tmp = PassRegistryObj;
- if (llvm_is_multithreaded()) {
- sys::MemoryFence();
- if (!tmp) {
- llvm_acquire_global_lock();
- tmp = PassRegistryObj;
- if (!tmp) {
- tmp = new PassRegistry();
- sys::MemoryFence();
- PassRegistryObj = tmp;
- }
- llvm_release_global_lock();
- }
- } else if (!tmp) {
- PassRegistryObj = new PassRegistry();
- }
-
- return PassRegistryObj;
+ return &*PassRegistryObj;
}
+static ManagedStatic<sys::SmartMutex<true> > Lock;
+
+//===----------------------------------------------------------------------===//
+// PassRegistryImpl
+//
+
namespace {
+struct PassRegistryImpl {
+ /// PassInfoMap - Keep track of the PassInfo object for each registered pass.
+ typedef DenseMap<const void*, const PassInfo*> MapType;
+ MapType PassInfoMap;
+
+ typedef StringMap<const PassInfo*> StringMapType;
+ StringMapType PassInfoStringMap;
+
+ /// AnalysisGroupInfo - Keep track of information for each analysis group.
+ struct AnalysisGroupInfo {
+ SmallPtrSet<const PassInfo *, 8> Implementations;
+ };
+ DenseMap<const PassInfo*, AnalysisGroupInfo> AnalysisGroupInfoMap;
+
+ std::vector<const PassInfo*> ToFree;
+ std::vector<PassRegistrationListener*> Listeners;
+};
+} // end anonymous namespace
-// FIXME: We use ManagedCleanup to erase the pass registrar on shutdown.
-// Unfortunately, passes are registered with static ctors, and having
-// llvm_shutdown clear this map prevents successful ressurection after
-// llvm_shutdown is run. Ideally we should find a solution so that we don't
-// leak the map, AND can still resurrect after shutdown.
-void cleanupPassRegistry(void*) {
- if (PassRegistryObj) {
- delete PassRegistryObj;
- PassRegistryObj = 0;
- }
+void *PassRegistry::getImpl() const {
+ if (!pImpl)
+ pImpl = new PassRegistryImpl();
+ return pImpl;
}
-ManagedCleanup<&cleanupPassRegistry> registryCleanup ATTRIBUTE_USED;
+//===----------------------------------------------------------------------===//
+// Accessors
+//
+
+PassRegistry::~PassRegistry() {
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(pImpl);
+
+ for (std::vector<const PassInfo*>::iterator I = Impl->ToFree.begin(),
+ E = Impl->ToFree.end(); I != E; ++I)
+ delete *I;
+
+ delete Impl;
+ pImpl = 0;
}
-const PassInfo *PassRegistry::getPassInfo(intptr_t TI) const {
- sys::SmartScopedLock<true> Guard(Lock);
- MapType::const_iterator I = PassInfoMap.find(TI);
- return I != PassInfoMap.end() ? I->second : 0;
+const PassInfo *PassRegistry::getPassInfo(const void *TI) const {
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ PassRegistryImpl::MapType::const_iterator I = Impl->PassInfoMap.find(TI);
+ return I != Impl->PassInfoMap.end() ? I->second : 0;
}
const PassInfo *PassRegistry::getPassInfo(StringRef Arg) const {
- sys::SmartScopedLock<true> Guard(Lock);
- StringMapType::const_iterator I = PassInfoStringMap.find(Arg);
- return I != PassInfoStringMap.end() ? I->second : 0;
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ PassRegistryImpl::StringMapType::const_iterator
+ I = Impl->PassInfoStringMap.find(Arg);
+ return I != Impl->PassInfoStringMap.end() ? I->second : 0;
}
-void PassRegistry::registerPass(const PassInfo &PI) {
- sys::SmartScopedLock<true> Guard(Lock);
+//===----------------------------------------------------------------------===//
+// Pass Registration mechanism
+//
+
+void PassRegistry::registerPass(const PassInfo &PI, bool ShouldFree) {
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
bool Inserted =
- PassInfoMap.insert(std::make_pair(PI.getTypeInfo(),&PI)).second;
- assert(Inserted && "Pass registered multiple times!"); Inserted=Inserted;
- PassInfoStringMap[PI.getPassArgument()] = &PI;
+ Impl->PassInfoMap.insert(std::make_pair(PI.getTypeInfo(),&PI)).second;
+ assert(Inserted && "Pass registered multiple times!");
+ (void)Inserted;
+ Impl->PassInfoStringMap[PI.getPassArgument()] = &PI;
+
+ // Notify any listeners.
+ for (std::vector<PassRegistrationListener*>::iterator
+ I = Impl->Listeners.begin(), E = Impl->Listeners.end(); I != E; ++I)
+ (*I)->passRegistered(&PI);
+
+ if (ShouldFree) Impl->ToFree.push_back(&PI);
}
void PassRegistry::unregisterPass(const PassInfo &PI) {
- sys::SmartScopedLock<true> Guard(Lock);
- MapType::iterator I = PassInfoMap.find(PI.getTypeInfo());
- assert(I != PassInfoMap.end() && "Pass registered but not in map!");
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ PassRegistryImpl::MapType::iterator I =
+ Impl->PassInfoMap.find(PI.getTypeInfo());
+ assert(I != Impl->PassInfoMap.end() && "Pass registered but not in map!");
// Remove pass from the map.
- PassInfoMap.erase(I);
- PassInfoStringMap.erase(PI.getPassArgument());
+ Impl->PassInfoMap.erase(I);
+ Impl->PassInfoStringMap.erase(PI.getPassArgument());
}
void PassRegistry::enumerateWith(PassRegistrationListener *L) {
- sys::SmartScopedLock<true> Guard(Lock);
- for (MapType::const_iterator I = PassInfoMap.begin(),
- E = PassInfoMap.end(); I != E; ++I)
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ for (PassRegistryImpl::MapType::const_iterator I = Impl->PassInfoMap.begin(),
+ E = Impl->PassInfoMap.end(); I != E; ++I)
L->passEnumerate(I->second);
}
/// Analysis Group Mechanisms.
-void PassRegistry::registerAnalysisGroup(PassInfo *InterfaceInfo,
- const PassInfo *ImplementationInfo,
- bool isDefault) {
- sys::SmartScopedLock<true> Guard(Lock);
- AnalysisGroupInfo &AGI = AnalysisGroupInfoMap[InterfaceInfo];
- assert(AGI.Implementations.count(ImplementationInfo) == 0 &&
- "Cannot add a pass to the same analysis group more than once!");
- AGI.Implementations.insert(ImplementationInfo);
- if (isDefault) {
- assert(InterfaceInfo->getNormalCtor() == 0 &&
- "Default implementation for analysis group already specified!");
- assert(ImplementationInfo->getNormalCtor() &&
- "Cannot specify pass as default if it does not have a default ctor");
- InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
+void PassRegistry::registerAnalysisGroup(const void *InterfaceID,
+ const void *PassID,
+ PassInfo& Registeree,
+ bool isDefault,
+ bool ShouldFree) {
+ PassInfo *InterfaceInfo = const_cast<PassInfo*>(getPassInfo(InterfaceID));
+ if (InterfaceInfo == 0) {
+ // First reference to Interface, register it now.
+ registerPass(Registeree);
+ InterfaceInfo = &Registeree;
+ }
+ assert(Registeree.isAnalysisGroup() &&
+ "Trying to join an analysis group that is a normal pass!");
+
+ if (PassID) {
+ PassInfo *ImplementationInfo = const_cast<PassInfo*>(getPassInfo(PassID));
+ assert(ImplementationInfo &&
+ "Must register pass before adding to AnalysisGroup!");
+
+ sys::SmartScopedLock<true> Guard(*Lock);
+
+ // Make sure we keep track of the fact that the implementation implements
+ // the interface.
+ ImplementationInfo->addInterfaceImplemented(InterfaceInfo);
+
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ PassRegistryImpl::AnalysisGroupInfo &AGI =
+ Impl->AnalysisGroupInfoMap[InterfaceInfo];
+ assert(AGI.Implementations.count(ImplementationInfo) == 0 &&
+ "Cannot add a pass to the same analysis group more than once!");
+ AGI.Implementations.insert(ImplementationInfo);
+ if (isDefault) {
+ assert(InterfaceInfo->getNormalCtor() == 0 &&
+ "Default implementation for analysis group already specified!");
+ assert(ImplementationInfo->getNormalCtor() &&
+ "Cannot specify pass as default if it does not have a default ctor");
+ InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
+ }
}
+
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ if (ShouldFree) Impl->ToFree.push_back(&Registeree);
+}
+
+void PassRegistry::addRegistrationListener(PassRegistrationListener *L) {
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ Impl->Listeners.push_back(L);
+}
+
+void PassRegistry::removeRegistrationListener(PassRegistrationListener *L) {
+ sys::SmartScopedLock<true> Guard(*Lock);
+
+ // NOTE: This is necessary, because removeRegistrationListener() can be called
+ // as part of the llvm_shutdown sequence. Since we have no control over the
+ // order of that sequence, we need to gracefully handle the case where the
+ // PassRegistry is destructed before the object that triggers this call.
+ if (!pImpl) return;
+
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ std::vector<PassRegistrationListener*>::iterator I =
+ std::find(Impl->Listeners.begin(), Impl->Listeners.end(), L);
+ assert(I != Impl->Listeners.end() &&
+ "PassRegistrationListener not registered!");
+ Impl->Listeners.erase(I);
}
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