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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
160 lines
5.6 KiB
C++
160 lines
5.6 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/PassSupport.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/ManagedStatic.h"
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using namespace llvm;
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static PassRegistry *PassRegistryObj = 0;
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PassRegistry *PassRegistry::getPassRegistry() {
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// Use double-checked locking to safely initialize the registrar when
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// we're running in multithreaded mode.
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PassRegistry* tmp = PassRegistryObj;
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if (llvm_is_multithreaded()) {
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sys::MemoryFence();
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if (!tmp) {
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llvm_acquire_global_lock();
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tmp = PassRegistryObj;
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if (!tmp) {
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tmp = new PassRegistry();
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sys::MemoryFence();
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PassRegistryObj = tmp;
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}
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llvm_release_global_lock();
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}
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} else if (!tmp) {
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PassRegistryObj = new PassRegistry();
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}
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return PassRegistryObj;
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}
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namespace {
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// FIXME: We use ManagedCleanup 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 ressurection 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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void cleanupPassRegistry(void*) {
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if (PassRegistryObj) {
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delete PassRegistryObj;
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PassRegistryObj = 0;
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}
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}
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ManagedCleanup<&cleanupPassRegistry> registryCleanup ATTRIBUTE_USED;
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}
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const PassInfo *PassRegistry::getPassInfo(const void *TI) const {
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sys::SmartScopedLock<true> Guard(Lock);
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MapType::const_iterator I = PassInfoMap.find(TI);
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return I != PassInfoMap.end() ? I->second : 0;
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}
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const PassInfo *PassRegistry::getPassInfo(StringRef Arg) const {
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sys::SmartScopedLock<true> Guard(Lock);
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StringMapType::const_iterator I = PassInfoStringMap.find(Arg);
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return I != PassInfoStringMap.end() ? I->second : 0;
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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) {
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sys::SmartScopedLock<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!"); Inserted=Inserted;
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PassInfoStringMap[PI.getPassArgument()] = &PI;
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// Notify any listeners.
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for (std::vector<PassRegistrationListener*>::iterator
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I = Listeners.begin(), E = Listeners.end(); I != E; ++I)
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(*I)->passRegistered(&PI);
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}
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void PassRegistry::unregisterPass(const PassInfo &PI) {
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sys::SmartScopedLock<true> Guard(Lock);
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MapType::iterator I = PassInfoMap.find(PI.getTypeInfo());
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assert(I != PassInfoMap.end() && "Pass registered but not in map!");
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// Remove pass from the map.
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PassInfoMap.erase(I);
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PassInfoStringMap.erase(PI.getPassArgument());
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}
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void PassRegistry::enumerateWith(PassRegistrationListener *L) {
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sys::SmartScopedLock<true> Guard(Lock);
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for (MapType::const_iterator I = PassInfoMap.begin(),
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E = PassInfoMap.end(); I != E; ++I)
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L->passEnumerate(I->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,
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bool isDefault) {
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PassInfo *InterfaceInfo = const_cast<PassInfo*>(getPassInfo(InterfaceID));
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if (InterfaceInfo == 0) {
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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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// 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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sys::SmartScopedLock<true> Guard(Lock);
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AnalysisGroupInfo &AGI = AnalysisGroupInfoMap[InterfaceInfo];
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assert(AGI.Implementations.count(ImplementationInfo) == 0 &&
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"Cannot add a pass to the same analysis group more than once!");
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AGI.Implementations.insert(ImplementationInfo);
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if (isDefault) {
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assert(InterfaceInfo->getNormalCtor() == 0 &&
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"Default implementation for analysis group already specified!");
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assert(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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}
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void PassRegistry::addRegistrationListener(PassRegistrationListener *L) {
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sys::SmartScopedLock<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::SmartScopedLock<true> Guard(Lock);
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std::vector<PassRegistrationListener*>::iterator I =
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std::find(Listeners.begin(), Listeners.end(), L);
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assert(I != Listeners.end() && "PassRegistrationListener not registered!");
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Listeners.erase(I);
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}
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