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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"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
static cl::opt<bool>
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 (AM)
AM->invalidate(M, PassPA);
PA.intersect(std::move(PassPA));
M->getContext().yield();
}
if (DebugPM)
dbgs() << "Finished module pass manager run.\n";
return PA;
}
ModuleAnalysisManager::ResultConceptT &
ModuleAnalysisManager::getResultImpl(void *PassID, Module *M) {
ModuleAnalysisResultMapT::iterator RI;
bool Inserted;
std::tie(RI, Inserted) = ModuleAnalysisResults.insert(std::make_pair(
PassID, std::unique_ptr<detail::AnalysisResultConcept<Module *>>()));
// If we don't have a cached result for this module, look up the pass and run
// it to produce a result, which we then add to the cache.
if (Inserted)
RI->second = lookupPass(PassID).run(M, this);
return *RI->second;
}
ModuleAnalysisManager::ResultConceptT *
ModuleAnalysisManager::getCachedResultImpl(void *PassID, Module *M) const {
ModuleAnalysisResultMapT::const_iterator RI =
ModuleAnalysisResults.find(PassID);
return RI == ModuleAnalysisResults.end() ? nullptr : &*RI->second;
}
void ModuleAnalysisManager::invalidateImpl(void *PassID, Module *M) {
ModuleAnalysisResults.erase(PassID);
}
void ModuleAnalysisManager::invalidateImpl(Module *M,
const PreservedAnalyses &PA) {
// FIXME: This is a total hack based on the fact that erasure doesn't
// invalidate iteration for DenseMap.
for (ModuleAnalysisResultMapT::iterator I = ModuleAnalysisResults.begin(),
E = ModuleAnalysisResults.end();
I != E; ++I)
if (I->second->invalidate(M, PA))
ModuleAnalysisResults.erase(I);
}
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 (AM)
AM->invalidate(F, PassPA);
PA.intersect(std::move(PassPA));
F->getContext().yield();
}
if (DebugPM)
dbgs() << "Finished function pass manager run.\n";
return PA;
}
bool FunctionAnalysisManager::empty() const {
assert(FunctionAnalysisResults.empty() ==
FunctionAnalysisResultLists.empty() &&
"The storage and index of analysis results disagree on how many there "
"are!");
return FunctionAnalysisResults.empty();
}
void FunctionAnalysisManager::clear() {
FunctionAnalysisResults.clear();
FunctionAnalysisResultLists.clear();
}
FunctionAnalysisManager::ResultConceptT &
FunctionAnalysisManager::getResultImpl(void *PassID, Function *F) {
FunctionAnalysisResultMapT::iterator RI;
bool Inserted;
std::tie(RI, Inserted) = FunctionAnalysisResults.insert(std::make_pair(
std::make_pair(PassID, F), FunctionAnalysisResultListT::iterator()));
// If we don't have a cached result for this function, look up the pass and
// run it to produce a result, which we then add to the cache.
if (Inserted) {
FunctionAnalysisResultListT &ResultList = FunctionAnalysisResultLists[F];
ResultList.emplace_back(PassID, lookupPass(PassID).run(F, this));
RI->second = std::prev(ResultList.end());
}
return *RI->second->second;
}
FunctionAnalysisManager::ResultConceptT *
FunctionAnalysisManager::getCachedResultImpl(void *PassID, Function *F) const {
FunctionAnalysisResultMapT::const_iterator RI =
FunctionAnalysisResults.find(std::make_pair(PassID, F));
return RI == FunctionAnalysisResults.end() ? nullptr : &*RI->second->second;
}
void FunctionAnalysisManager::invalidateImpl(void *PassID, Function *F) {
FunctionAnalysisResultMapT::iterator RI =
FunctionAnalysisResults.find(std::make_pair(PassID, F));
if (RI == FunctionAnalysisResults.end())
return;
FunctionAnalysisResultLists[F].erase(RI->second);
}
void FunctionAnalysisManager::invalidateImpl(Function *F,
const PreservedAnalyses &PA) {
// Clear all the invalidated results associated specifically with this
// function.
SmallVector<void *, 8> InvalidatedPassIDs;
FunctionAnalysisResultListT &ResultsList = FunctionAnalysisResultLists[F];
for (FunctionAnalysisResultListT::iterator I = ResultsList.begin(),
E = ResultsList.end();
I != E;)
if (I->second->invalidate(F, PA)) {
InvalidatedPassIDs.push_back(I->first);
I = ResultsList.erase(I);
} else {
++I;
}
while (!InvalidatedPassIDs.empty())
FunctionAnalysisResults.erase(
std::make_pair(InvalidatedPassIDs.pop_back_val(), F));
if (ResultsList.empty())
FunctionAnalysisResultLists.erase(F);
}
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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