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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
129 lines
4.5 KiB
C++
129 lines
4.5 KiB
C++
//===- PassRegistry.cpp - Pass Registration Implementation ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/PassInfo.h"
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#include "llvm/PassSupport.h"
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#include "llvm/Support/ManagedStatic.h"
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#include <cassert>
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#include <memory>
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#include <utility>
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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() = default;
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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 = llvm::find(Listeners, L);
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Listeners.erase(I);
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}
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