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s/ForcedLastUses/TransferLastUses/g 

Register pass has the its last user, otherwise sometimes no one will claim
LastUse.

Handle transferred last uses from child pass manager.

llvm-svn: 32589
This commit is contained in:
Devang Patel 2006-12-15 00:08:26 +00:00
parent 3958955f47
commit 832bc079b2
1 changed files with 26 additions and 12 deletions
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38
llvm/lib/VMCore/PassManager.cpp
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@ -250,7 +250,7 @@ public:
/// Initialize available analysis information.
void initializeAnalysisInfo() {
ForcedLastUses.clear();
TransferLastUses.clear();
AvailableAnalysis.clear();
}
@ -330,12 +330,18 @@ public:
cerr << "\n";
}
}
std::vector<Pass *>& getTransferredLastUses() {
return TransferLastUses;
}
protected:
// Collection of pass whose last user asked this manager to claim
// last use. If a FunctionPass F is the last user of ModulePass info M
// If a FunctionPass F is the last user of ModulePass info M
// then the F's manager, not F, records itself as a last user of M.
std::vector<Pass *> ForcedLastUses;
// Current pass manage is requesting parent manager to record parent
// manager as the last user of these TrransferLastUses passes.
std::vector<Pass *> TransferLastUses;
// Top level manager.
PMTopLevelManager *TPM;
@ -853,7 +859,7 @@ void PMDataManager::addPassToManager(Pass *P,
LastUses.push_back(PRequired);
else if (PDepth > RDepth) {
// Let the parent claim responsibility of last use
ForcedLastUses.push_back(PRequired);
TransferLastUses.push_back(PRequired);
} else {
// Note : This feature is not yet implemented
assert (0 &&
@ -861,8 +867,8 @@ void PMDataManager::addPassToManager(Pass *P,
}
}
if (!LastUses.empty())
TPM->setLastUser(LastUses, P);
LastUses.push_back(P);
TPM->setLastUser(LastUses, P);
// Take a note of analysis required and made available by this pass.
// Remove the analysis not preserved by this pass
@ -1161,10 +1167,14 @@ FunctionPassManagerImpl_New::addPass(Pass *P) {
// Add pass into new manager. This time it must succeed.
if (!activeBBPassManager->addPass(BP))
assert(0 && "Unable to add Pass");
// If activeBBPassManager transfered any Last Uses then handle them here.
std::vector<Pass *> &TLU = activeBBPassManager->getTransferredLastUses();
if (!TLU.empty())
TPM->setLastUser(TLU, this);
}
if (!ForcedLastUses.empty())
TPM->setLastUser(ForcedLastUses, this);
return true;
}
@ -1326,10 +1336,14 @@ ModulePassManager::addPass(Pass *P) {
// Add pass into new manager. This time it must succeed.
if (!activeFunctionPassManager->addPass(FP))
assert(0 && "Unable to add pass");
}
if (!ForcedLastUses.empty())
TPM->setLastUser(ForcedLastUses, this);
// If activeFunctionPassManager transfered any Last Uses then
// handle them here.
std::vector<Pass *> &TLU =
activeFunctionPassManager->getTransferredLastUses();
if (!TLU.empty())
TPM->setLastUser(TLU, this);
}
return true;
}