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//===- PassManager.cpp - Infrastructure for managing & running IR passes --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/STLExtras.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/PassManager.h"
using namespace llvm;
using llvm::detail::DebugPM;
cl::opt<bool> llvm::detail::DebugPM(
"debug-pass-manager", cl::Hidden,
cl::desc("Print pass management debugging information"));
PreservedAnalyses ModulePassManager::run(Module &M, ModuleAnalysisManager *AM) {
PreservedAnalyses PA = PreservedAnalyses::all();
if (DebugPM)
dbgs() << "Starting module pass manager run.\n";
for (unsigned Idx = 0, Size = Passes.size(); Idx != Size; ++Idx) {
if (DebugPM)
dbgs() << "Running module pass: " << Passes[Idx]->name() << "\n";
PreservedAnalyses PassPA = Passes[Idx]->run(M, AM);
// If we have an active analysis manager at this level we want to ensure we
// update it as each pass runs and potentially invalidates analyses. We
// also update the preserved set of analyses based on what analyses we have
// already handled the invalidation for here and don't need to invalidate
// when finished.
if (AM)
PassPA = AM->invalidate(M, std::move(PassPA));
// Finally, we intersect the final preserved analyses to compute the
// aggregate preserved set for this pass manager.
PA.intersect(std::move(PassPA));
M.getContext().yield();
}
if (DebugPM)
dbgs() << "Finished module pass manager run.\n";
return PA;
}
PreservedAnalyses FunctionPassManager::run(Function &F,
FunctionAnalysisManager *AM) {
PreservedAnalyses PA = PreservedAnalyses::all();
if (DebugPM)
dbgs() << "Starting function pass manager run.\n";
for (unsigned Idx = 0, Size = Passes.size(); Idx != Size; ++Idx) {
if (DebugPM)
dbgs() << "Running function pass: " << Passes[Idx]->name() << "\n";
PreservedAnalyses PassPA = Passes[Idx]->run(F, AM);
// If we have an active analysis manager at this level we want to ensure we
// update it as each pass runs and potentially invalidates analyses. We
// also update the preserved set of analyses based on what analyses we have
// already handled the invalidation for here and don't need to invalidate
// when finished.
if (AM)
PassPA = AM->invalidate(F, std::move(PassPA));
// Finally, we intersect the final preserved analyses to compute the
// aggregate preserved set for this pass manager.
PA.intersect(std::move(PassPA));
F.getContext().yield();
}
if (DebugPM)
dbgs() << "Finished function pass manager run.\n";
return PA;
}
char FunctionAnalysisManagerModuleProxy::PassID;
FunctionAnalysisManagerModuleProxy::Result
FunctionAnalysisManagerModuleProxy::run(Module &M) {
assert(FAM->empty() && "Function analyses ran prior to the module proxy!");
return Result(*FAM);
}
FunctionAnalysisManagerModuleProxy::Result::~Result() {
// Clear out the analysis manager if we're being destroyed -- it means we
// didn't even see an invalidate call when we got invalidated.
FAM->clear();
}
bool FunctionAnalysisManagerModuleProxy::Result::invalidate(
Module &M, const PreservedAnalyses &PA) {
// If this proxy isn't marked as preserved, then we can't even invalidate
// individual function analyses, there may be an invalid set of Function
// objects in the cache making it impossible to incrementally preserve them.
// Just clear the entire manager.
if (!PA.preserved(ID()))
FAM->clear();
// Return false to indicate that this result is still a valid proxy.
return false;
}
char ModuleAnalysisManagerFunctionProxy::PassID;
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