public FunctionPass {
public:
- BBPassManager(int Depth) : PMDataManager(Depth) { }
+ static char ID;
+ BBPassManager(int Depth)
+ : PMDataManager(Depth), FunctionPass((intptr_t)&ID) {}
/// Execute all of the passes scheduled for execution. Keep track of
/// whether any of the passes modifies the function, and if so, return true.
}
};
+char BBPassManager::ID = 0;
}
namespace llvm {
public PMDataManager,
public PMTopLevelManager {
public:
-
- FunctionPassManagerImpl(int Depth) : PMDataManager(Depth),
- PMTopLevelManager(TLM_Function) { }
+ static char ID;
+ FunctionPassManagerImpl(int Depth) :
+ Pass((intptr_t)&ID), PMDataManager(Depth),
+ PMTopLevelManager(TLM_Function) { }
/// add - Add a pass to the queue of passes to run. This passes ownership of
/// the Pass to the PassManager. When the PassManager is destroyed, the pass
FPPassManager *FP = static_cast<FPPassManager *>(PassManagers[N]);
return FP;
}
-
};
+char FunctionPassManagerImpl::ID = 0;
//===----------------------------------------------------------------------===//
// MPPassManager
//
class MPPassManager : public Pass, public PMDataManager {
public:
- MPPassManager(int Depth) : PMDataManager(Depth) { }
-
+ static char ID;
+ MPPassManager(int Depth) : Pass((intptr_t)&ID), PMDataManager(Depth) { }
+
+ // Delete on the fly managers.
+ virtual ~MPPassManager() {
+ for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
+ I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
+ I != E; ++I) {
+ FunctionPassManagerImpl *FPP = I->second;
+ delete FPP;
+ }
+ }
+
/// run - Execute all of the passes scheduled for execution. Keep track of
/// whether any of the passes modifies the module, and if so, return true.
bool runOnModule(Module &M);
Info.setPreservesAll();
}
+ /// Add RequiredPass into list of lower level passes required by pass P.
+ /// RequiredPass is run on the fly by Pass Manager when P requests it
+ /// through getAnalysis interface.
+ virtual void addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass);
+
+ /// Return function pass corresponding to PassInfo PI, that is
+ /// required by module pass MP. Instantiate analysis pass, by using
+ /// its runOnFunction() for function F.
+ virtual Pass* getOnTheFlyPass(Pass *MP, const PassInfo *PI, Function &F);
+
virtual const char *getPassName() const {
return "Module Pass Manager";
}
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
ModulePass *MP = getContainedPass(Index);
MP->dumpPassStructure(Offset + 1);
+ if (FunctionPassManagerImpl *FPP = OnTheFlyManagers[MP])
+ FPP->dumpPassStructure(Offset + 2);
dumpLastUses(MP, Offset+1);
}
}
virtual PassManagerType getPassManagerType() const {
return PMT_ModulePassManager;
}
+
+ private:
+ /// Collection of on the fly FPPassManagers. These managers manage
+ /// function passes that are required by module passes.
+ std::map<Pass *, FunctionPassManagerImpl *> OnTheFlyManagers;
};
+char MPPassManager::ID = 0;
//===----------------------------------------------------------------------===//
// PassManagerImpl
//
+
/// PassManagerImpl manages MPPassManagers
class PassManagerImpl : public Pass,
public PMDataManager,
public PMTopLevelManager {
public:
-
- PassManagerImpl(int Depth) : PMDataManager(Depth),
+ static char ID;
+ PassManagerImpl(int Depth) : Pass((intptr_t)&ID), PMDataManager(Depth),
PMTopLevelManager(TLM_Pass) { }
/// add - Add a pass to the queue of passes to run. This passes ownership of
};
+char PassManagerImpl::ID = 0;
} // End of llvm namespace
namespace {
E = AnalysisPasses.end(); I != E; ++I) {
Pass *AP = *I;
LastUser[AP] = P;
+
+ if (P == AP)
+ continue;
+
// If AP is the last user of other passes then make P last user of
// such passes.
for (std::map<Pass *, Pass *>::iterator LUI = LastUser.begin(),
Pass *AnalysisPass = findAnalysisPass(*I);
if (!AnalysisPass) {
- // Schedule this analysis run first.
AnalysisPass = (*I)->createPass();
- schedulePass(AnalysisPass);
+ // Schedule this analysis run first only if it is not a lower level
+ // analysis pass. Lower level analsyis passes are run on the fly.
+ if (P->getPotentialPassManagerType () >=
+ AnalysisPass->getPotentialPassManagerType())
+ schedulePass(AnalysisPass);
+ else
+ delete AnalysisPass;
}
}
}
}
+// Return true if P preserves high level analysis used by other
+// passes managed by this manager
+bool PMDataManager::preserveHigherLevelAnalysis(Pass *P) {
+
+ AnalysisUsage AnUsage;
+ P->getAnalysisUsage(AnUsage);
+
+ if (AnUsage.getPreservesAll())
+ return true;
+
+ const std::vector<AnalysisID> &PreservedSet = AnUsage.getPreservedSet();
+ for (std::vector<Pass *>::iterator I = HigherLevelAnalysis.begin(),
+ E = HigherLevelAnalysis.end(); I != E; ++I) {
+ Pass *P1 = *I;
+ if (!dynamic_cast<ImmutablePass*>(P1)
+ && std::find(PreservedSet.begin(), PreservedSet.end(), P1->getPassInfo()) ==
+ PreservedSet.end())
+ return false;
+ }
+
+ return true;
+}
+
/// Remove Analyss not preserved by Pass P
void PMDataManager::removeNotPreservedAnalysis(Pass *P) {
AnalysisUsage AnUsage;
for (std::map<AnalysisID, Pass*>::iterator I = AvailableAnalysis.begin(),
E = AvailableAnalysis.end(); I != E; ) {
std::map<AnalysisID, Pass*>::iterator Info = I++;
- if (std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
- PreservedSet.end()) {
+ if (!dynamic_cast<ImmutablePass*>(Info->second)
+ && std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
+ PreservedSet.end())
// Remove this analysis
- if (!dynamic_cast<ImmutablePass*>(Info->second))
- AvailableAnalysis.erase(Info);
+ AvailableAnalysis.erase(Info);
+ }
+
+ // Check inherited analysis also. If P is not preserving analysis
+ // provided by parent manager then remove it here.
+ for (unsigned Index = 0; Index < PMT_Last; ++Index) {
+
+ if (!InheritedAnalysis[Index])
+ continue;
+
+ for (std::map<AnalysisID, Pass*>::iterator
+ I = InheritedAnalysis[Index]->begin(),
+ E = InheritedAnalysis[Index]->end(); I != E; ) {
+ std::map<AnalysisID, Pass *>::iterator Info = I++;
+ if (!dynamic_cast<ImmutablePass*>(Info->second)
+ && std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
+ PreservedSet.end())
+ // Remove this analysis
+ InheritedAnalysis[Index]->erase(Info);
}
}
+
}
/// Remove analysis passes that are not used any longer
enum PassDebuggingString DBG_STR) {
std::vector<Pass *> DeadPasses;
+
+ // If this is a on the fly manager then it does not have TPM.
+ if (!TPM)
+ return;
+
TPM->collectLastUses(DeadPasses, P);
for (std::vector<Pass *>::iterator I = DeadPasses.begin(),
// At the moment, this pass is the last user of all required passes.
std::vector<Pass *> LastUses;
- std::vector<Pass *> RequiredPasses;
+ SmallVector<Pass *, 8> RequiredPasses;
+ SmallVector<AnalysisID, 8> ReqAnalysisNotAvailable;
+
unsigned PDepth = this->getDepth();
- collectRequiredAnalysisPasses(RequiredPasses, P);
- for (std::vector<Pass *>::iterator I = RequiredPasses.begin(),
+ collectRequiredAnalysis(RequiredPasses,
+ ReqAnalysisNotAvailable, P);
+ for (SmallVector<Pass *, 8>::iterator I = RequiredPasses.begin(),
E = RequiredPasses.end(); I != E; ++I) {
Pass *PRequired = *I;
unsigned RDepth = 0;
else if (PDepth > RDepth) {
// Let the parent claim responsibility of last use
TransferLastUses.push_back(PRequired);
- } else {
- // Note : This feature is not yet implemented
- assert (0 &&
- "Unable to handle Pass that requires lower level Analysis pass");
- }
+ // Keep track of higher level analysis used by this manager.
+ HigherLevelAnalysis.push_back(PRequired);
+ } else
+ assert (0 && "Unable to accomodate Required Pass");
}
// Set P as P's last user until someone starts using P.
TransferLastUses.clear();
}
+ // Now, take care of required analysises that are not available.
+ for (SmallVector<AnalysisID, 8>::iterator
+ I = ReqAnalysisNotAvailable.begin(),
+ E = ReqAnalysisNotAvailable.end() ;I != E; ++I) {
+ Pass *AnalysisPass = (*I)->createPass();
+ this->addLowerLevelRequiredPass(P, AnalysisPass);
+ }
+
// Take a note of analysis required and made available by this pass.
// Remove the analysis not preserved by this pass
removeNotPreservedAnalysis(P);
PassVector.push_back(P);
}
-/// Populate RequiredPasses with the analysis pass that are required by
-/// pass P.
-void PMDataManager::collectRequiredAnalysisPasses(std::vector<Pass *> &RP,
- Pass *P) {
+
+/// Populate RP with analysis pass that are required by
+/// pass P and are available. Populate RP_NotAvail with analysis
+/// pass that are required by pass P but are not available.
+void PMDataManager::collectRequiredAnalysis(SmallVector<Pass *, 8>&RP,
+ SmallVector<AnalysisID, 8> &RP_NotAvail,
+ Pass *P) {
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
const std::vector<AnalysisID> &RequiredSet = AnUsage.getRequiredSet();
for (std::vector<AnalysisID>::const_iterator
I = RequiredSet.begin(), E = RequiredSet.end();
I != E; ++I) {
- Pass *AnalysisPass = findAnalysisPass(*I, true);
- assert (AnalysisPass && "Analysis pass is not available");
- RP.push_back(AnalysisPass);
+ AnalysisID AID = *I;
+ if (Pass *AnalysisPass = findAnalysisPass(*I, true))
+ RP.push_back(AnalysisPass);
+ else
+ RP_NotAvail.push_back(AID);
}
const std::vector<AnalysisID> &IDs = AnUsage.getRequiredTransitiveSet();
for (std::vector<AnalysisID>::const_iterator I = IDs.begin(),
E = IDs.end(); I != E; ++I) {
- Pass *AnalysisPass = findAnalysisPass(*I, true);
- assert (AnalysisPass && "Analysis pass is not available");
- RP.push_back(AnalysisPass);
+ AnalysisID AID = *I;
+ if (Pass *AnalysisPass = findAnalysisPass(*I, true))
+ RP.push_back(AnalysisPass);
+ else
+ RP_NotAvail.push_back(AID);
}
}
E = AnUsage.getRequiredSet().end(); I != E; ++I) {
Pass *Impl = findAnalysisPass(*I, true);
if (Impl == 0)
- assert(0 && "Analysis used but not available!");
+ // This may be analysis pass that is initialized on the fly.
+ // If that is not the case then it will raise an assert when it is used.
+ continue;
AnalysisResolver *AR = P->getResolver();
AR->addAnalysisImplsPair(*I, Impl);
}
void PMDataManager::dumpLastUses(Pass *P, unsigned Offset) const{
std::vector<Pass *> LUses;
-
- assert (TPM && "Top Level Manager is missing");
+
+ // If this is a on the fly manager then it does not have TPM.
+ if (!TPM)
+ return;
+
TPM->collectLastUses(LUses, P);
for (std::vector<Pass *>::iterator I = LUses.begin(),
return PM.findAnalysisPass(ID, dir);
}
+Pass *AnalysisResolver::findImplPass(Pass *P, const PassInfo *AnalysisPI,
+ Function &F) {
+ return PM.getOnTheFlyPass(P, AnalysisPI, F);
+}
+
//===----------------------------------------------------------------------===//
// BBPassManager implementation
//===----------------------------------------------------------------------===//
// FPPassManager implementation
+char FPPassManager::ID = 0;
/// Print passes managed by this manager
void FPPassManager::dumpPassStructure(unsigned Offset) {
llvm::cerr << std::string(Offset*2, ' ') << "FunctionPass Manager\n";
return Changed;
}
+/// Add RequiredPass into list of lower level passes required by pass P.
+/// RequiredPass is run on the fly by Pass Manager when P requests it
+/// through getAnalysis interface.
+void MPPassManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) {
+
+ assert (P->getPotentialPassManagerType() == PMT_ModulePassManager
+ && "Unable to handle Pass that requires lower level Analysis pass");
+ assert ((P->getPotentialPassManagerType() <
+ RequiredPass->getPotentialPassManagerType())
+ && "Unable to handle Pass that requires lower level Analysis pass");
+
+ FunctionPassManagerImpl *FPP = OnTheFlyManagers[P];
+ if (!FPP) {
+ FPP = new FunctionPassManagerImpl(0);
+ // FPP is the top level manager.
+ FPP->setTopLevelManager(FPP);
+
+ OnTheFlyManagers[P] = FPP;
+ }
+ FPP->add(RequiredPass);
+
+ // Register P as the last user of RequiredPass.
+ std::vector<Pass *> LU;
+ LU.push_back(RequiredPass);
+ FPP->setLastUser(LU, P);
+}
+
+/// Return function pass corresponding to PassInfo PI, that is
+/// required by module pass MP. Instantiate analysis pass, by using
+/// its runOnFunction() for function F.
+Pass* MPPassManager::getOnTheFlyPass(Pass *MP, const PassInfo *PI,
+ Function &F) {
+ AnalysisID AID = PI;
+ FunctionPassManagerImpl *FPP = OnTheFlyManagers[MP];
+ assert (FPP && "Unable to find on the fly pass");
+
+ FPP->run(F);
+ return (dynamic_cast<PMTopLevelManager *>(FPP))->findAnalysisPass(AID);
+}
+
+
//===----------------------------------------------------------------------===//
// PassManagerImpl implementation
//
/// Find appropriate Module Pass Manager in the PM Stack and
/// add self into that manager.
void ModulePass::assignPassManager(PMStack &PMS,
- PassManagerType PreferredType) {
+ PassManagerType PreferredType) {
// Find Module Pass Manager
while(!PMS.empty()) {
/// Find appropriate Function Pass Manager or Call Graph Pass Manager
/// in the PM Stack and add self into that manager.
void FunctionPass::assignPassManager(PMStack &PMS,
- PassManagerType PreferredType) {
+ PassManagerType PreferredType) {
// Find Module Pass Manager (TODO : Or Call Graph Pass Manager)
while(!PMS.empty()) {
/// Find appropriate Basic Pass Manager or Call Graph Pass Manager
/// in the PM Stack and add self into that manager.
void BasicBlockPass::assignPassManager(PMStack &PMS,
- PassManagerType PreferredType) {
+ PassManagerType PreferredType) {
BBPassManager *BBP = NULL;
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