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[LegacyPassManager] Simplify PMStack pop

This commit is contained in:
Fangrui Song 2019-11-28 13:34:32 -08:00
parent 674df13b5f
commit a7abe6eac0
1 changed files with 6 additions and 18 deletions
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24
llvm/lib/IR/LegacyPassManager.cpp
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@ -1776,16 +1776,10 @@ LLVM_DUMP_METHOD void PMStack::dump() const {
void ModulePass::assignPassManager(PMStack &PMS,
PassManagerType PreferredType) {
// Find Module Pass Manager
while (!PMS.empty()) {
PassManagerType TopPMType = PMS.top()->getPassManagerType();
if (TopPMType == PreferredType)
break; // We found desired pass manager
else if (TopPMType > PMT_ModulePassManager)
PMS.pop(); // Pop children pass managers
else
break;
}
assert(!PMS.empty() && "Unable to find appropriate Pass Manager");
PassManagerType T;
while ((T = PMS.top()->getPassManagerType()) > PMT_ModulePassManager &&
T != PreferredType)
PMS.pop();
PMS.top()->add(this);
}
@ -1793,21 +1787,15 @@ void ModulePass::assignPassManager(PMStack &PMS,
/// in the PM Stack and add self into that manager.
void FunctionPass::assignPassManager(PMStack &PMS,
PassManagerType PreferredType) {
// Find Function Pass Manager
while (!PMS.empty()) {
if (PMS.top()->getPassManagerType() > PMT_FunctionPassManager)
PMS.pop();
else
break;
}
while (PMS.top()->getPassManagerType() > PMT_FunctionPassManager)
PMS.pop();
// Create new Function Pass Manager if needed.
FPPassManager *FPP;
if (PMS.top()->getPassManagerType() == PMT_FunctionPassManager) {
FPP = (FPPassManager *)PMS.top();
} else {
assert(!PMS.empty() && "Unable to create Function Pass Manager");
PMDataManager *PMD = PMS.top();
// [1] Create new Function Pass Manager