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168 lines
5.7 KiB
C++
168 lines
5.7 KiB
C++
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//===- CGSCCPassManager.cpp - Managing & running CGSCC passes -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/CGSCCPassManager.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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using namespace llvm;
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static cl::opt<bool>
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DebugPM("debug-cgscc-pass-manager", cl::Hidden,
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cl::desc("Print CGSCC pass management debugging information"));
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PreservedAnalyses CGSCCPassManager::run(LazyCallGraph::SCC *C,
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CGSCCAnalysisManager *AM) {
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PreservedAnalyses PA = PreservedAnalyses::all();
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if (DebugPM)
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dbgs() << "Starting CGSCC pass manager run.\n";
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for (unsigned Idx = 0, Size = Passes.size(); Idx != Size; ++Idx) {
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if (DebugPM)
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dbgs() << "Running CGSCC pass: " << Passes[Idx]->name() << "\n";
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PreservedAnalyses PassPA = Passes[Idx]->run(C, AM);
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if (AM)
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AM->invalidate(C, PassPA);
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PA.intersect(std::move(PassPA));
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}
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if (DebugPM)
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dbgs() << "Finished CGSCC pass manager run.\n";
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return PA;
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}
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bool CGSCCAnalysisManager::empty() const {
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assert(CGSCCAnalysisResults.empty() == CGSCCAnalysisResultLists.empty() &&
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"The storage and index of analysis results disagree on how many there "
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"are!");
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return CGSCCAnalysisResults.empty();
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}
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void CGSCCAnalysisManager::clear() {
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CGSCCAnalysisResults.clear();
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CGSCCAnalysisResultLists.clear();
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}
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CGSCCAnalysisManager::ResultConceptT &
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CGSCCAnalysisManager::getResultImpl(void *PassID, LazyCallGraph::SCC *C) {
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CGSCCAnalysisResultMapT::iterator RI;
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bool Inserted;
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std::tie(RI, Inserted) = CGSCCAnalysisResults.insert(std::make_pair(
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std::make_pair(PassID, C), CGSCCAnalysisResultListT::iterator()));
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// If we don't have a cached result for this function, look up the pass and
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// run it to produce a result, which we then add to the cache.
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if (Inserted) {
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CGSCCAnalysisResultListT &ResultList = CGSCCAnalysisResultLists[C];
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ResultList.emplace_back(PassID, lookupPass(PassID).run(C, this));
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RI->second = std::prev(ResultList.end());
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}
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return *RI->second->second;
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}
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CGSCCAnalysisManager::ResultConceptT *
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CGSCCAnalysisManager::getCachedResultImpl(void *PassID,
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LazyCallGraph::SCC *C) const {
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CGSCCAnalysisResultMapT::const_iterator RI =
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CGSCCAnalysisResults.find(std::make_pair(PassID, C));
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return RI == CGSCCAnalysisResults.end() ? nullptr : &*RI->second->second;
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}
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void CGSCCAnalysisManager::invalidateImpl(void *PassID, LazyCallGraph::SCC *C) {
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CGSCCAnalysisResultMapT::iterator RI =
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CGSCCAnalysisResults.find(std::make_pair(PassID, C));
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if (RI == CGSCCAnalysisResults.end())
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return;
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CGSCCAnalysisResultLists[C].erase(RI->second);
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}
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void CGSCCAnalysisManager::invalidateImpl(LazyCallGraph::SCC *C,
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const PreservedAnalyses &PA) {
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// Clear all the invalidated results associated specifically with this
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// function.
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SmallVector<void *, 8> InvalidatedPassIDs;
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CGSCCAnalysisResultListT &ResultsList = CGSCCAnalysisResultLists[C];
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for (CGSCCAnalysisResultListT::iterator I = ResultsList.begin(),
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E = ResultsList.end();
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I != E;)
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if (I->second->invalidate(C, PA)) {
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InvalidatedPassIDs.push_back(I->first);
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I = ResultsList.erase(I);
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} else {
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++I;
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}
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while (!InvalidatedPassIDs.empty())
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CGSCCAnalysisResults.erase(
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std::make_pair(InvalidatedPassIDs.pop_back_val(), C));
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CGSCCAnalysisResultLists.erase(C);
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}
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char CGSCCAnalysisManagerModuleProxy::PassID;
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CGSCCAnalysisManagerModuleProxy::Result
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CGSCCAnalysisManagerModuleProxy::run(Module *M) {
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assert(CGAM->empty() && "CGSCC analyses ran prior to the module proxy!");
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return Result(*CGAM);
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}
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CGSCCAnalysisManagerModuleProxy::Result::~Result() {
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// Clear out the analysis manager if we're being destroyed -- it means we
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// didn't even see an invalidate call when we got invalidated.
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CGAM->clear();
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}
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bool CGSCCAnalysisManagerModuleProxy::Result::invalidate(
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Module *M, const PreservedAnalyses &PA) {
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// If this proxy isn't marked as preserved, then we can't even invalidate
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// individual CGSCC analyses, there may be an invalid set of SCC objects in
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// the cache making it impossible to incrementally preserve them.
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// Just clear the entire manager.
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if (!PA.preserved(ID()))
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CGAM->clear();
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// Return false to indicate that this result is still a valid proxy.
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return false;
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}
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char ModuleAnalysisManagerCGSCCProxy::PassID;
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char FunctionAnalysisManagerCGSCCProxy::PassID;
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FunctionAnalysisManagerCGSCCProxy::Result
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FunctionAnalysisManagerCGSCCProxy::run(LazyCallGraph::SCC *C) {
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assert(FAM->empty() && "Function analyses ran prior to the CGSCC proxy!");
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return Result(*FAM);
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}
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FunctionAnalysisManagerCGSCCProxy::Result::~Result() {
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// Clear out the analysis manager if we're being destroyed -- it means we
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// didn't even see an invalidate call when we got invalidated.
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FAM->clear();
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}
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bool FunctionAnalysisManagerCGSCCProxy::Result::invalidate(
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LazyCallGraph::SCC *C, const PreservedAnalyses &PA) {
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// If this proxy isn't marked as preserved, then we can't even invalidate
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// individual function analyses, there may be an invalid set of Function
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// objects in the cache making it impossible to incrementally preserve them.
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// Just clear the entire manager.
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if (!PA.preserved(ID()))
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FAM->clear();
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// Return false to indicate that this result is still a valid proxy.
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return false;
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}
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char CGSCCAnalysisManagerFunctionProxy::PassID;
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