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Current pass manager, not the parent pass manager, assumes the role of

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last user when one of the managed pass uses info provided by parent pass
manager.

This was exposed by LPPassManager work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34936 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2007-03-05 22:57:49 +00:00
parent 61e85b2821
commit cf5fb2b614
2 changed files with 10 additions and 33 deletions
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32
lib/VMCore/PassManager.cpp
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@@ -158,7 +158,6 @@ public:
recordAvailableAnalysis(IP);
} else {
P->assignPassManager(activeStack);
activeStack.handleLastUserOverflow();
}
}
@@ -259,7 +258,6 @@ public:
recordAvailableAnalysis(IP);
} else {
P->assignPassManager(activeStack);
activeStack.handleLastUserOverflow();
}
}
@@ -587,6 +585,10 @@ void PMDataManager::add(Pass *P,
AnalysisResolver *AR = new AnalysisResolver(*this);
P->setResolver(AR);
// 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 *> TransferLastUses;
if (ProcessAnalysis) {
// At the moment, this pass is the last user of all required passes.
@@ -622,6 +624,12 @@ void PMDataManager::add(Pass *P,
LastUses.push_back(P);
TPM->setLastUser(LastUses, P);
if (!TransferLastUses.empty()) {
Pass *My_PM = dynamic_cast<Pass *>(this);
TPM->setLastUser(TransferLastUses, My_PM);
TransferLastUses.clear();
}
// Take a note of analysis required and made available by this pass.
// Remove the analysis not preserved by this pass
removeNotPreservedAnalysis(P);
@@ -1231,26 +1239,6 @@ void PMStack::dump() {
printf ("\n");
}
// Walk Pass Manager stack and set LastUse markers if any
// manager is transfering this priviledge to its parent manager
void PMStack::handleLastUserOverflow() {
for(PMStack::iterator I = this->begin(), E = this->end(); I != E;) {
PMDataManager *Child = *I++;
if (I != E) {
PMDataManager *Parent = *I++;
PMTopLevelManager *TPM = Parent->getTopLevelManager();
std::vector<Pass *> &TLU = Child->getTransferredLastUses();
if (!TLU.empty()) {
Pass *P = dynamic_cast<Pass *>(Parent);
TPM->setLastUser(TLU, P);
TLU.clear();
}
}
}
}
/// Find appropriate Module Pass Manager in the PM Stack and
/// add self into that manager.
void ModulePass::assignPassManager(PMStack &PMS,