126 lines
4.4 KiB
C++
126 lines
4.4 KiB
C++
//===- PassRegistry.cpp - Pass Registration Implementation ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PassRegistry, with which passes are registered on
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// initialization, and supports the PassManager in dependency resolution.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/PassRegistry.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/PassSupport.h"
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#include "llvm/Support/ManagedStatic.h"
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using namespace llvm;
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// FIXME: We use ManagedStatic to erase the pass registrar on shutdown.
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// Unfortunately, passes are registered with static ctors, and having
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// llvm_shutdown clear this map prevents successful resurrection after
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// llvm_shutdown is run. Ideally we should find a solution so that we don't
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// leak the map, AND can still resurrect after shutdown.
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static ManagedStatic<PassRegistry> PassRegistryObj;
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PassRegistry *PassRegistry::getPassRegistry() {
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return &*PassRegistryObj;
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}
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//===----------------------------------------------------------------------===//
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// Accessors
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//
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PassRegistry::~PassRegistry() {}
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const PassInfo *PassRegistry::getPassInfo(const void *TI) const {
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sys::SmartScopedReader<true> Guard(Lock);
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MapType::const_iterator I = PassInfoMap.find(TI);
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return I != PassInfoMap.end() ? I->second : nullptr;
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}
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const PassInfo *PassRegistry::getPassInfo(StringRef Arg) const {
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sys::SmartScopedReader<true> Guard(Lock);
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StringMapType::const_iterator I = PassInfoStringMap.find(Arg);
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return I != PassInfoStringMap.end() ? I->second : nullptr;
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}
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//===----------------------------------------------------------------------===//
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// Pass Registration mechanism
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//
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void PassRegistry::registerPass(const PassInfo &PI, bool ShouldFree) {
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sys::SmartScopedWriter<true> Guard(Lock);
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bool Inserted =
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PassInfoMap.insert(std::make_pair(PI.getTypeInfo(), &PI)).second;
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assert(Inserted && "Pass registered multiple times!");
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(void)Inserted;
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PassInfoStringMap[PI.getPassArgument()] = &PI;
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// Notify any listeners.
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for (auto *Listener : Listeners)
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Listener->passRegistered(&PI);
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if (ShouldFree)
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ToFree.push_back(std::unique_ptr<const PassInfo>(&PI));
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}
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void PassRegistry::enumerateWith(PassRegistrationListener *L) {
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sys::SmartScopedReader<true> Guard(Lock);
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for (auto PassInfoPair : PassInfoMap)
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L->passEnumerate(PassInfoPair.second);
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}
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/// Analysis Group Mechanisms.
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void PassRegistry::registerAnalysisGroup(const void *InterfaceID,
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const void *PassID,
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PassInfo &Registeree, bool isDefault,
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bool ShouldFree) {
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PassInfo *InterfaceInfo = const_cast<PassInfo *>(getPassInfo(InterfaceID));
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if (!InterfaceInfo) {
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// First reference to Interface, register it now.
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registerPass(Registeree);
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InterfaceInfo = &Registeree;
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}
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assert(Registeree.isAnalysisGroup() &&
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"Trying to join an analysis group that is a normal pass!");
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if (PassID) {
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PassInfo *ImplementationInfo = const_cast<PassInfo *>(getPassInfo(PassID));
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assert(ImplementationInfo &&
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"Must register pass before adding to AnalysisGroup!");
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sys::SmartScopedWriter<true> Guard(Lock);
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// Make sure we keep track of the fact that the implementation implements
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// the interface.
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ImplementationInfo->addInterfaceImplemented(InterfaceInfo);
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if (isDefault) {
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assert(InterfaceInfo->getNormalCtor() == nullptr &&
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"Default implementation for analysis group already specified!");
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assert(
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ImplementationInfo->getNormalCtor() &&
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"Cannot specify pass as default if it does not have a default ctor");
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InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
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}
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}
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if (ShouldFree)
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ToFree.push_back(std::unique_ptr<const PassInfo>(&Registeree));
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}
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void PassRegistry::addRegistrationListener(PassRegistrationListener *L) {
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sys::SmartScopedWriter<true> Guard(Lock);
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Listeners.push_back(L);
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}
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void PassRegistry::removeRegistrationListener(PassRegistrationListener *L) {
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sys::SmartScopedWriter<true> Guard(Lock);
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auto I = find(Listeners, L);
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Listeners.erase(I);
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}
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