Chandler Carruth | 572e340 | 2014-04-21 11:12:00 +0000 | [diff] [blame] | 1 | //===- CGSCCPassManager.cpp - Managing & running CGSCC passes -------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "llvm/Analysis/CGSCCPassManager.h" |
| 11 | #include "llvm/Support/CommandLine.h" |
| 12 | #include "llvm/Support/Debug.h" |
| 13 | |
| 14 | using namespace llvm; |
| 15 | |
| 16 | static cl::opt<bool> |
| 17 | DebugPM("debug-cgscc-pass-manager", cl::Hidden, |
| 18 | cl::desc("Print CGSCC pass management debugging information")); |
| 19 | |
| 20 | PreservedAnalyses CGSCCPassManager::run(LazyCallGraph::SCC *C, |
| 21 | CGSCCAnalysisManager *AM) { |
| 22 | PreservedAnalyses PA = PreservedAnalyses::all(); |
| 23 | |
| 24 | if (DebugPM) |
| 25 | dbgs() << "Starting CGSCC pass manager run.\n"; |
| 26 | |
| 27 | for (unsigned Idx = 0, Size = Passes.size(); Idx != Size; ++Idx) { |
| 28 | if (DebugPM) |
| 29 | dbgs() << "Running CGSCC pass: " << Passes[Idx]->name() << "\n"; |
| 30 | |
| 31 | PreservedAnalyses PassPA = Passes[Idx]->run(C, AM); |
| 32 | if (AM) |
| 33 | AM->invalidate(C, PassPA); |
| 34 | PA.intersect(std::move(PassPA)); |
| 35 | } |
| 36 | |
| 37 | if (DebugPM) |
| 38 | dbgs() << "Finished CGSCC pass manager run.\n"; |
| 39 | |
| 40 | return PA; |
| 41 | } |
| 42 | |
| 43 | bool CGSCCAnalysisManager::empty() const { |
| 44 | assert(CGSCCAnalysisResults.empty() == CGSCCAnalysisResultLists.empty() && |
| 45 | "The storage and index of analysis results disagree on how many there " |
| 46 | "are!"); |
| 47 | return CGSCCAnalysisResults.empty(); |
| 48 | } |
| 49 | |
| 50 | void CGSCCAnalysisManager::clear() { |
| 51 | CGSCCAnalysisResults.clear(); |
| 52 | CGSCCAnalysisResultLists.clear(); |
| 53 | } |
| 54 | |
| 55 | CGSCCAnalysisManager::ResultConceptT & |
| 56 | CGSCCAnalysisManager::getResultImpl(void *PassID, LazyCallGraph::SCC *C) { |
| 57 | CGSCCAnalysisResultMapT::iterator RI; |
| 58 | bool Inserted; |
| 59 | std::tie(RI, Inserted) = CGSCCAnalysisResults.insert(std::make_pair( |
| 60 | std::make_pair(PassID, C), CGSCCAnalysisResultListT::iterator())); |
| 61 | |
| 62 | // If we don't have a cached result for this function, look up the pass and |
| 63 | // run it to produce a result, which we then add to the cache. |
| 64 | if (Inserted) { |
| 65 | CGSCCAnalysisResultListT &ResultList = CGSCCAnalysisResultLists[C]; |
| 66 | ResultList.emplace_back(PassID, lookupPass(PassID).run(C, this)); |
| 67 | RI->second = std::prev(ResultList.end()); |
| 68 | } |
| 69 | |
| 70 | return *RI->second->second; |
| 71 | } |
| 72 | |
| 73 | CGSCCAnalysisManager::ResultConceptT * |
| 74 | CGSCCAnalysisManager::getCachedResultImpl(void *PassID, |
| 75 | LazyCallGraph::SCC *C) const { |
| 76 | CGSCCAnalysisResultMapT::const_iterator RI = |
| 77 | CGSCCAnalysisResults.find(std::make_pair(PassID, C)); |
| 78 | return RI == CGSCCAnalysisResults.end() ? nullptr : &*RI->second->second; |
| 79 | } |
| 80 | |
| 81 | void CGSCCAnalysisManager::invalidateImpl(void *PassID, LazyCallGraph::SCC *C) { |
| 82 | CGSCCAnalysisResultMapT::iterator RI = |
| 83 | CGSCCAnalysisResults.find(std::make_pair(PassID, C)); |
| 84 | if (RI == CGSCCAnalysisResults.end()) |
| 85 | return; |
| 86 | |
| 87 | CGSCCAnalysisResultLists[C].erase(RI->second); |
| 88 | } |
| 89 | |
| 90 | void CGSCCAnalysisManager::invalidateImpl(LazyCallGraph::SCC *C, |
| 91 | const PreservedAnalyses &PA) { |
| 92 | // Clear all the invalidated results associated specifically with this |
| 93 | // function. |
| 94 | SmallVector<void *, 8> InvalidatedPassIDs; |
| 95 | CGSCCAnalysisResultListT &ResultsList = CGSCCAnalysisResultLists[C]; |
| 96 | for (CGSCCAnalysisResultListT::iterator I = ResultsList.begin(), |
| 97 | E = ResultsList.end(); |
| 98 | I != E;) |
| 99 | if (I->second->invalidate(C, PA)) { |
| 100 | InvalidatedPassIDs.push_back(I->first); |
| 101 | I = ResultsList.erase(I); |
| 102 | } else { |
| 103 | ++I; |
| 104 | } |
| 105 | while (!InvalidatedPassIDs.empty()) |
| 106 | CGSCCAnalysisResults.erase( |
| 107 | std::make_pair(InvalidatedPassIDs.pop_back_val(), C)); |
| 108 | CGSCCAnalysisResultLists.erase(C); |
| 109 | } |
| 110 | |
| 111 | char CGSCCAnalysisManagerModuleProxy::PassID; |
| 112 | |
| 113 | CGSCCAnalysisManagerModuleProxy::Result |
| 114 | CGSCCAnalysisManagerModuleProxy::run(Module *M) { |
| 115 | assert(CGAM->empty() && "CGSCC analyses ran prior to the module proxy!"); |
| 116 | return Result(*CGAM); |
| 117 | } |
| 118 | |
| 119 | CGSCCAnalysisManagerModuleProxy::Result::~Result() { |
| 120 | // Clear out the analysis manager if we're being destroyed -- it means we |
| 121 | // didn't even see an invalidate call when we got invalidated. |
| 122 | CGAM->clear(); |
| 123 | } |
| 124 | |
| 125 | bool CGSCCAnalysisManagerModuleProxy::Result::invalidate( |
| 126 | Module *M, const PreservedAnalyses &PA) { |
| 127 | // If this proxy isn't marked as preserved, then we can't even invalidate |
| 128 | // individual CGSCC analyses, there may be an invalid set of SCC objects in |
| 129 | // the cache making it impossible to incrementally preserve them. |
| 130 | // Just clear the entire manager. |
| 131 | if (!PA.preserved(ID())) |
| 132 | CGAM->clear(); |
| 133 | |
| 134 | // Return false to indicate that this result is still a valid proxy. |
| 135 | return false; |
| 136 | } |
| 137 | |
| 138 | char ModuleAnalysisManagerCGSCCProxy::PassID; |
| 139 | |
| 140 | char FunctionAnalysisManagerCGSCCProxy::PassID; |
| 141 | |
| 142 | FunctionAnalysisManagerCGSCCProxy::Result |
| 143 | FunctionAnalysisManagerCGSCCProxy::run(LazyCallGraph::SCC *C) { |
| 144 | assert(FAM->empty() && "Function analyses ran prior to the CGSCC proxy!"); |
| 145 | return Result(*FAM); |
| 146 | } |
| 147 | |
| 148 | FunctionAnalysisManagerCGSCCProxy::Result::~Result() { |
| 149 | // Clear out the analysis manager if we're being destroyed -- it means we |
| 150 | // didn't even see an invalidate call when we got invalidated. |
| 151 | FAM->clear(); |
| 152 | } |
| 153 | |
| 154 | bool FunctionAnalysisManagerCGSCCProxy::Result::invalidate( |
| 155 | LazyCallGraph::SCC *C, const PreservedAnalyses &PA) { |
| 156 | // If this proxy isn't marked as preserved, then we can't even invalidate |
| 157 | // individual function analyses, there may be an invalid set of Function |
| 158 | // objects in the cache making it impossible to incrementally preserve them. |
| 159 | // Just clear the entire manager. |
| 160 | if (!PA.preserved(ID())) |
| 161 | FAM->clear(); |
| 162 | |
| 163 | // Return false to indicate that this result is still a valid proxy. |
| 164 | return false; |
| 165 | } |
| 166 | |
| 167 | char CGSCCAnalysisManagerFunctionProxy::PassID; |