//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#include "llvm/Pass.h"
#include "llvm/PassManager.h"
#include "llvm/Module.h"
-#include "llvm/ModuleProvider.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/TypeInfo.h"
+#include "llvm/Support/PassNameParser.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Atomic.h"
+#include "llvm/System/Mutex.h"
+#include "llvm/System/Threading.h"
+#include <algorithm>
+#include <map>
#include <set>
using namespace llvm;
// Pass Implementation
//
+// Force out-of-line virtual method.
+Pass::~Pass() {
+ delete Resolver;
+}
+
// Force out-of-line virtual method.
ModulePass::~ModulePass() { }
+PassManagerType ModulePass::getPotentialPassManagerType() const {
+ return PMT_ModulePassManager;
+}
+
bool Pass::mustPreserveAnalysisID(const PassInfo *AnalysisID) const {
- return Resolver->getAnalysisToUpdate(AnalysisID, true) != 0;
+ return Resolver->getAnalysisIfAvailable(AnalysisID, true) != 0;
}
// dumpPassStructure - Implement the -debug-passes=Structure option
void Pass::dumpPassStructure(unsigned Offset) {
- cerr << std::string(Offset*2, ' ') << getPassName() << "\n";
+ dbgs().indent(Offset*2) << getPassName() << "\n";
}
-// getPassName - Use C++ RTTI to get a SOMEWHAT intelligible name for the pass.
-//
+/// getPassName - Return a nice clean name for a pass. This usually
+/// implemented in terms of the name that is registered by one of the
+/// Registration templates, but can be overloaded directly.
+///
const char *Pass::getPassName() const {
if (const PassInfo *PI = getPassInfo())
return PI->getPassName();
- return typeid(*this).name();
+ return "Unnamed pass: implement Pass::getPassName()";
+}
+
+void Pass::preparePassManager(PMStack &) {
+ // By default, don't do anything.
+}
+
+PassManagerType Pass::getPotentialPassManagerType() const {
+ // Default implementation.
+ return PMT_Unknown;
+}
+
+void Pass::getAnalysisUsage(AnalysisUsage &) const {
+ // By default, no analysis results are used, all are invalidated.
+}
+
+void Pass::releaseMemory() {
+ // By default, don't do anything.
+}
+
+void Pass::verifyAnalysis() const {
+ // By default, don't do anything.
}
// print - Print out the internal state of the pass. This is called by Analyze
// to print out the contents of an analysis. Otherwise it is not necessary to
// implement this method.
//
-void Pass::print(std::ostream &O,const Module*) const {
+void Pass::print(raw_ostream &O,const Module*) const {
O << "Pass::print not implemented for pass: '" << getPassName() << "'!\n";
}
// dump - call print(cerr);
void Pass::dump() const {
- print(*cerr.stream(), 0);
+ print(dbgs(), 0);
}
//===----------------------------------------------------------------------===//
// Force out-of-line virtual method.
ImmutablePass::~ImmutablePass() { }
+void ImmutablePass::initializePass() {
+ // By default, don't do anything.
+}
+
//===----------------------------------------------------------------------===//
// FunctionPass Implementation
//
// run - On a function, we simply initialize, run the function, then finalize.
//
bool FunctionPass::run(Function &F) {
- if (F.isDeclaration()) return false;// Passes are not run on external functions!
+ // Passes are not run on external functions!
+ if (F.isDeclaration()) return false;
bool Changed = doInitialization(*F.getParent());
Changed |= runOnFunction(F);
return Changed | doFinalization(*F.getParent());
}
+bool FunctionPass::doInitialization(Module &) {
+ // By default, don't do anything.
+ return false;
+}
+
+bool FunctionPass::doFinalization(Module &) {
+ // By default, don't do anything.
+ return false;
+}
+
+PassManagerType FunctionPass::getPotentialPassManagerType() const {
+ return PMT_FunctionPassManager;
+}
+
//===----------------------------------------------------------------------===//
// BasicBlockPass Implementation
//
return Changed | doFinalization(F);
}
-// To run directly on the basic block, we initialize, runOnBasicBlock, then
-// finalize.
-//
-bool BasicBlockPass::runPass(BasicBlock &BB) {
- Function &F = *BB.getParent();
- Module &M = *F.getParent();
- bool Changed = doInitialization(M);
- Changed |= doInitialization(F);
- Changed |= runOnBasicBlock(BB);
- Changed |= doFinalization(F);
- Changed |= doFinalization(M);
- return Changed;
+bool BasicBlockPass::doInitialization(Module &) {
+ // By default, don't do anything.
+ return false;
+}
+
+bool BasicBlockPass::doInitialization(Function &) {
+ // By default, don't do anything.
+ return false;
+}
+
+bool BasicBlockPass::doFinalization(Function &) {
+ // By default, don't do anything.
+ return false;
+}
+
+bool BasicBlockPass::doFinalization(Module &) {
+ // By default, don't do anything.
+ return false;
+}
+
+PassManagerType BasicBlockPass::getPotentialPassManagerType() const {
+ return PMT_BasicBlockPassManager;
}
//===----------------------------------------------------------------------===//
class PassRegistrar {
/// PassInfoMap - Keep track of the passinfo object for each registered llvm
/// pass.
- std::map<TypeInfo, PassInfo*> PassInfoMap;
+ typedef std::map<intptr_t, const PassInfo*> MapType;
+ MapType PassInfoMap;
+
+ typedef StringMap<const PassInfo*> StringMapType;
+ StringMapType PassInfoStringMap;
/// AnalysisGroupInfo - Keep track of information for each analysis group.
struct AnalysisGroupInfo {
- const PassInfo *DefaultImpl;
std::set<const PassInfo *> Implementations;
- AnalysisGroupInfo() : DefaultImpl(0) {}
};
/// AnalysisGroupInfoMap - Information for each analysis group.
public:
- const PassInfo *GetPassInfo(const std::type_info &TI) const {
- std::map<TypeInfo, PassInfo*>::const_iterator I = PassInfoMap.find(TI);
+ const PassInfo *GetPassInfo(intptr_t TI) const {
+ MapType::const_iterator I = PassInfoMap.find(TI);
return I != PassInfoMap.end() ? I->second : 0;
}
- void RegisterPass(PassInfo &PI) {
+ const PassInfo *GetPassInfo(StringRef Arg) const {
+ StringMapType::const_iterator I = PassInfoStringMap.find(Arg);
+ return I != PassInfoStringMap.end() ? I->second : 0;
+ }
+
+ void RegisterPass(const PassInfo &PI) {
bool Inserted =
- PassInfoMap.insert(std::make_pair(TypeInfo(PI.getTypeInfo()),&PI)).second;
- assert(Inserted && "Pass registered multiple times!");
+ PassInfoMap.insert(std::make_pair(PI.getTypeInfo(),&PI)).second;
+ assert(Inserted && "Pass registered multiple times!"); Inserted=Inserted;
+ PassInfoStringMap[PI.getPassArgument()] = &PI;
}
- void UnregisterPass(PassInfo &PI) {
- std::map<TypeInfo, PassInfo*>::iterator I =
- PassInfoMap.find(PI.getTypeInfo());
+ void UnregisterPass(const PassInfo &PI) {
+ MapType::iterator I = PassInfoMap.find(PI.getTypeInfo());
assert(I != PassInfoMap.end() && "Pass registered but not in map!");
// Remove pass from the map.
PassInfoMap.erase(I);
+ PassInfoStringMap.erase(PI.getPassArgument());
}
void EnumerateWith(PassRegistrationListener *L) {
- for (std::map<TypeInfo, PassInfo*>::const_iterator I = PassInfoMap.begin(),
+ for (MapType::const_iterator I = PassInfoMap.begin(),
E = PassInfoMap.end(); I != E; ++I)
L->passEnumerate(I->second);
}
"Cannot add a pass to the same analysis group more than once!");
AGI.Implementations.insert(ImplementationInfo);
if (isDefault) {
- assert(AGI.DefaultImpl == 0 && InterfaceInfo->getNormalCtor() == 0 &&
+ 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");
- AGI.DefaultImpl = ImplementationInfo;
InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
}
}
};
}
-static ManagedStatic<PassRegistrar> PassRegistrarObj;
static std::vector<PassRegistrationListener*> *Listeners = 0;
+static sys::SmartMutex<true> ListenersLock;
+
+// FIXME: This should use ManagedStatic to manage the pass registrar.
+// Unfortunately, we can't do this, because passes are registered with static
+// ctors, and having llvm_shutdown clear this map prevents successful
+// ressurection after llvm_shutdown is run.
+static PassRegistrar *getPassRegistrar() {
+ static PassRegistrar *PassRegistrarObj = 0;
+
+ // Use double-checked locking to safely initialize the registrar when
+ // we're running in multithreaded mode.
+ PassRegistrar* tmp = PassRegistrarObj;
+ if (llvm_is_multithreaded()) {
+ sys::MemoryFence();
+ if (!tmp) {
+ llvm_acquire_global_lock();
+ tmp = PassRegistrarObj;
+ if (!tmp) {
+ tmp = new PassRegistrar();
+ sys::MemoryFence();
+ PassRegistrarObj = tmp;
+ }
+ llvm_release_global_lock();
+ }
+ } else if (!tmp) {
+ PassRegistrarObj = new PassRegistrar();
+ }
+
+ return PassRegistrarObj;
+}
// getPassInfo - Return the PassInfo data structure that corresponds to this
// pass...
const PassInfo *Pass::getPassInfo() const {
- if (PassInfoCache) return PassInfoCache;
- return lookupPassInfo(typeid(*this));
+ return lookupPassInfo(PassID);
}
-const PassInfo *Pass::lookupPassInfo(const std::type_info &TI) {
- return PassRegistrarObj->GetPassInfo(TI);
+const PassInfo *Pass::lookupPassInfo(intptr_t TI) {
+ return getPassRegistrar()->GetPassInfo(TI);
}
-void RegisterPassBase::registerPass() {
- PassRegistrarObj->RegisterPass(PIObj);
+const PassInfo *Pass::lookupPassInfo(StringRef Arg) {
+ return getPassRegistrar()->GetPassInfo(Arg);
+}
+
+void PassInfo::registerPass() {
+ getPassRegistrar()->RegisterPass(*this);
// Notify any listeners.
+ sys::SmartScopedLock<true> Lock(ListenersLock);
if (Listeners)
for (std::vector<PassRegistrationListener*>::iterator
I = Listeners->begin(), E = Listeners->end(); I != E; ++I)
- (*I)->passRegistered(&PIObj);
+ (*I)->passRegistered(this);
}
-void RegisterPassBase::unregisterPass() {
- PassRegistrarObj->UnregisterPass(PIObj);
+void PassInfo::unregisterPass() {
+ getPassRegistrar()->UnregisterPass(*this);
}
//===----------------------------------------------------------------------===//
// RegisterAGBase implementation
//
-RegisterAGBase::RegisterAGBase(const std::type_info &Interface,
- const std::type_info *Pass, bool isDefault)
- : RegisterPassBase(Interface),
- ImplementationInfo(0), isDefaultImplementation(isDefault) {
+RegisterAGBase::RegisterAGBase(const char *Name, intptr_t InterfaceID,
+ intptr_t PassID, bool isDefault)
+ : PassInfo(Name, InterfaceID) {
- InterfaceInfo = const_cast<PassInfo*>(Pass::lookupPassInfo(Interface));
+ PassInfo *InterfaceInfo =
+ const_cast<PassInfo*>(Pass::lookupPassInfo(InterfaceID));
if (InterfaceInfo == 0) {
// First reference to Interface, register it now.
registerPass();
- InterfaceInfo = &PIObj;
+ InterfaceInfo = this;
}
- assert(PIObj.isAnalysisGroup() &&
+ assert(isAnalysisGroup() &&
"Trying to join an analysis group that is a normal pass!");
- if (Pass) {
- ImplementationInfo = Pass::lookupPassInfo(*Pass);
+ if (PassID) {
+ const PassInfo *ImplementationInfo = Pass::lookupPassInfo(PassID);
assert(ImplementationInfo &&
"Must register pass before adding to AnalysisGroup!");
PassInfo *IIPI = const_cast<PassInfo*>(ImplementationInfo);
IIPI->addInterfaceImplemented(InterfaceInfo);
- PassRegistrarObj->RegisterAnalysisGroup(InterfaceInfo, IIPI, isDefault);
+ getPassRegistrar()->RegisterAnalysisGroup(InterfaceInfo, IIPI, isDefault);
}
}
-void RegisterAGBase::setGroupName(const char *Name) {
- assert(InterfaceInfo->getPassName()[0] == 0 && "Interface Name already set!");
- InterfaceInfo->setPassName(Name);
-}
-
//===----------------------------------------------------------------------===//
// PassRegistrationListener implementation
// PassRegistrationListener ctor - Add the current object to the list of
// PassRegistrationListeners...
PassRegistrationListener::PassRegistrationListener() {
+ sys::SmartScopedLock<true> Lock(ListenersLock);
if (!Listeners) Listeners = new std::vector<PassRegistrationListener*>();
Listeners->push_back(this);
}
// dtor - Remove object from list of listeners...
PassRegistrationListener::~PassRegistrationListener() {
+ sys::SmartScopedLock<true> Lock(ListenersLock);
std::vector<PassRegistrationListener*>::iterator I =
std::find(Listeners->begin(), Listeners->end(), this);
assert(Listeners && I != Listeners->end() &&
// passEnumerate callback on each PassInfo object.
//
void PassRegistrationListener::enumeratePasses() {
- PassRegistrarObj->EnumerateWith(this);
+ getPassRegistrar()->EnumerateWith(this);
}
+PassNameParser::~PassNameParser() {}
+
//===----------------------------------------------------------------------===//
// AnalysisUsage Class Implementation
//
namespace {
struct GetCFGOnlyPasses : public PassRegistrationListener {
- std::vector<AnalysisID> &CFGOnlyList;
- GetCFGOnlyPasses(std::vector<AnalysisID> &L) : CFGOnlyList(L) {}
+ typedef AnalysisUsage::VectorType VectorType;
+ VectorType &CFGOnlyList;
+ GetCFGOnlyPasses(VectorType &L) : CFGOnlyList(L) {}
void passEnumerate(const PassInfo *P) {
if (P->isCFGOnlyPass())
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