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Keep track of analysis usage information for passes. Avoid invoking 

getAnalysisUsage() repeatedly.

llvm-svn: 54650
This commit is contained in:
Devang Patel 2008-08-11 21:13:39 +00:00
parent c82ad79c64
commit ec9e1a60ad
2 changed files with 44 additions and 23 deletions
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6
llvm/include/llvm/PassManagers.h
View File

@ -13,6 +13,7 @@
#include "llvm/PassManager.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/DenseMap.h"
#include <deque>
#include <map>
@ -172,6 +173,9 @@ public:
/// then return NULL.
Pass *findAnalysisPass(AnalysisID AID);
/// Find analysis usage information for the pass P.
AnalysisUsage *findAnalysisUsage(Pass *P);
explicit PMTopLevelManager(enum TopLevelManagerType t);
virtual ~PMTopLevelManager();
@ -221,6 +225,8 @@ private:
/// Immutable passes are managed by top level manager.
std::vector<ImmutablePass *> ImmutablePasses;
DenseMap<Pass *, AnalysisUsage *> AnUsageMap;
};

61
llvm/lib/VMCore/PassManager.cpp
View File

@ -421,6 +421,19 @@ void PMTopLevelManager::collectLastUses(SmallVector<Pass *, 12> &LastUses,
LastUses.push_back(LUI->first);
}
AnalysisUsage *PMTopLevelManager::findAnalysisUsage(Pass *P) {
AnalysisUsage *AnUsage = NULL;
DenseMap<Pass *, AnalysisUsage *>::iterator DMI = AnUsageMap.find(P);
if (DMI != AnUsageMap.end())
AnUsage = DMI->second;
else {
AnUsage = new AnalysisUsage();
P->getAnalysisUsage(*AnUsage);
AnUsageMap[P] = AnUsage;
}
return AnUsage;
}
/// Schedule pass P for execution. Make sure that passes required by
/// P are run before P is run. Update analysis info maintained by
/// the manager. Remove dead passes. This is a recursive function.
@ -439,9 +452,9 @@ void PMTopLevelManager::schedulePass(Pass *P) {
P->getPassInfo()->isAnalysis() && findAnalysisPass(P->getPassInfo()))
return;
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
const AnalysisUsage::VectorType &RequiredSet = AnUsage.getRequiredSet();
AnalysisUsage *AnUsage = findAnalysisUsage(P);
const AnalysisUsage::VectorType &RequiredSet = AnUsage->getRequiredSet();
for (AnalysisUsage::VectorType::const_iterator I = RequiredSet.begin(),
E = RequiredSet.end(); I != E; ++I) {
@ -555,6 +568,13 @@ PMTopLevelManager::~PMTopLevelManager() {
for (std::vector<ImmutablePass *>::iterator
I = ImmutablePasses.begin(), E = ImmutablePasses.end(); I != E; ++I)
delete *I;
for (DenseMap<Pass *, AnalysisUsage *>::iterator DMI = AnUsageMap.begin(),
DME = AnUsageMap.end(); DMI != DME; ++DMI) {
AnalysisUsage *AU = DMI->second;
delete AU;
}
}
//===----------------------------------------------------------------------===//
@ -578,13 +598,12 @@ void PMDataManager::recordAvailableAnalysis(Pass *P) {
// passes managed by this manager
bool PMDataManager::preserveHigherLevelAnalysis(Pass *P) {
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
if (AnUsage.getPreservesAll())
if (AnUsage->getPreservesAll())
return true;
const AnalysisUsage::VectorType &PreservedSet = AnUsage.getPreservedSet();
const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
for (std::vector<Pass *>::iterator I = HigherLevelAnalysis.begin(),
E = HigherLevelAnalysis.end(); I != E; ++I) {
Pass *P1 = *I;
@ -604,9 +623,8 @@ void PMDataManager::verifyPreservedAnalysis(Pass *P) {
#ifdef NDEBUG
return;
#endif
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
const AnalysisUsage::VectorType &PreservedSet = AnUsage.getPreservedSet();
AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
// Verify preserved analysis
for (AnalysisUsage::VectorType::const_iterator I = PreservedSet.begin(),
@ -659,12 +677,11 @@ void PMDataManager::verifyDomInfo(Pass &P, Function &F) {
/// Remove Analysis not preserved by Pass P
void PMDataManager::removeNotPreservedAnalysis(Pass *P) {
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
if (AnUsage.getPreservesAll())
AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
if (AnUsage->getPreservesAll())
return;
const AnalysisUsage::VectorType &PreservedSet = AnUsage.getPreservedSet();
const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
for (std::map<AnalysisID, Pass*>::iterator I = AvailableAnalysis.begin(),
E = AvailableAnalysis.end(); I != E; ) {
std::map<AnalysisID, Pass*>::iterator Info = I++;
@ -820,9 +837,8 @@ void PMDataManager::add(Pass *P,
void PMDataManager::collectRequiredAnalysis(SmallVector<Pass *, 8>&RP,
SmallVector<AnalysisID, 8> &RP_NotAvail,
Pass *P) {
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
const AnalysisUsage::VectorType &RequiredSet = AnUsage.getRequiredSet();
AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
const AnalysisUsage::VectorType &RequiredSet = AnUsage->getRequiredSet();
for (AnalysisUsage::VectorType::const_iterator
I = RequiredSet.begin(), E = RequiredSet.end();
I != E; ++I) {
@ -833,7 +849,7 @@ void PMDataManager::collectRequiredAnalysis(SmallVector<Pass *, 8>&RP,
RP_NotAvail.push_back(AID);
}
const AnalysisUsage::VectorType &IDs = AnUsage.getRequiredTransitiveSet();
const AnalysisUsage::VectorType &IDs = AnUsage->getRequiredTransitiveSet();
for (AnalysisUsage::VectorType::const_iterator I = IDs.begin(),
E = IDs.end(); I != E; ++I) {
AnalysisID AID = *I;
@ -850,12 +866,11 @@ void PMDataManager::collectRequiredAnalysis(SmallVector<Pass *, 8>&RP,
// implementations it needs.
//
void PMDataManager::initializeAnalysisImpl(Pass *P) {
AnalysisUsage AnUsage;
P->getAnalysisUsage(AnUsage);
AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
for (AnalysisUsage::VectorType::const_iterator
I = AnUsage.getRequiredSet().begin(),
E = AnUsage.getRequiredSet().end(); I != E; ++I) {
I = AnUsage->getRequiredSet().begin(),
E = AnUsage->getRequiredSet().end(); I != E; ++I) {
Pass *Impl = findAnalysisPass(*I, true);
if (Impl == 0)
// This may be analysis pass that is initialized on the fly.