#include "llvm/ModuleProvider.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/ManagedStatic.h"
+#include "llvm/System/Atomic.h"
+#include "llvm/System/Mutex.h"
+#include "llvm/System/Threading.h"
#include <algorithm>
#include <map>
#include <set>
ModulePass::~ModulePass() { }
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 RegisterPass(const PassInfo &PI) {
bool Inserted =
PassInfoMap.insert(std::make_pair(PI.getTypeInfo(),&PI)).second;
- assert(Inserted && "Pass registered multiple times!");
+ assert(Inserted && "Pass registered multiple times!"); Inserted=Inserted;
}
void UnregisterPass(const PassInfo &PI) {
}
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
// ressurection after llvm_shutdown is run.
static PassRegistrar *getPassRegistrar() {
static PassRegistrar *PassRegistrarObj = 0;
- if (!PassRegistrarObj)
+
+ // 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;
}
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)
// 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() &&
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())