| //===- CGSCCPassManagerTest.cpp -------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Analysis/CGSCCPassManager.h" |
| #include "llvm/Analysis/LazyCallGraph.h" |
| #include "llvm/Analysis/TargetLibraryInfo.h" |
| #include "llvm/AsmParser/Parser.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/InstIterator.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/IR/PassManager.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| class TestModuleAnalysis : public AnalysisInfoMixin<TestModuleAnalysis> { |
| public: |
| struct Result { |
| Result(int Count) : FunctionCount(Count) {} |
| int FunctionCount; |
| }; |
| |
| TestModuleAnalysis(int &Runs) : Runs(Runs) {} |
| |
| Result run(Module &M, ModuleAnalysisManager &AM) { |
| ++Runs; |
| return Result(M.size()); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestModuleAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestModuleAnalysis::Key; |
| |
| class TestSCCAnalysis : public AnalysisInfoMixin<TestSCCAnalysis> { |
| public: |
| struct Result { |
| Result(int Count) : FunctionCount(Count) {} |
| int FunctionCount; |
| }; |
| |
| TestSCCAnalysis(int &Runs) : Runs(Runs) {} |
| |
| Result run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, LazyCallGraph &) { |
| ++Runs; |
| return Result(C.size()); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestSCCAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestSCCAnalysis::Key; |
| |
| class TestFunctionAnalysis : public AnalysisInfoMixin<TestFunctionAnalysis> { |
| public: |
| struct Result { |
| Result(int Count) : InstructionCount(Count) {} |
| int InstructionCount; |
| }; |
| |
| TestFunctionAnalysis(int &Runs) : Runs(Runs) {} |
| |
| Result run(Function &F, FunctionAnalysisManager &AM) { |
| ++Runs; |
| int Count = 0; |
| for (Instruction &I : instructions(F)) { |
| (void)I; |
| ++Count; |
| } |
| return Result(Count); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestFunctionAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestFunctionAnalysis::Key; |
| |
| class TestImmutableFunctionAnalysis |
| : public AnalysisInfoMixin<TestImmutableFunctionAnalysis> { |
| public: |
| struct Result { |
| bool invalidate(Function &, const PreservedAnalyses &, |
| FunctionAnalysisManager::Invalidator &) { |
| return false; |
| } |
| }; |
| |
| TestImmutableFunctionAnalysis(int &Runs) : Runs(Runs) {} |
| |
| Result run(Function &F, FunctionAnalysisManager &AM) { |
| ++Runs; |
| return Result(); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestImmutableFunctionAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestImmutableFunctionAnalysis::Key; |
| |
| struct LambdaModulePass : public PassInfoMixin<LambdaModulePass> { |
| template <typename T> |
| LambdaModulePass(T &&Arg) : Func(std::forward<T>(Arg)) {} |
| |
| PreservedAnalyses run(Module &F, ModuleAnalysisManager &AM) { |
| return Func(F, AM); |
| } |
| |
| std::function<PreservedAnalyses(Module &, ModuleAnalysisManager &)> Func; |
| }; |
| |
| struct LambdaSCCPass : public PassInfoMixin<LambdaSCCPass> { |
| template <typename T> LambdaSCCPass(T &&Arg) : Func(std::forward<T>(Arg)) {} |
| |
| PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| return Func(C, AM, CG, UR); |
| } |
| |
| std::function<PreservedAnalyses(LazyCallGraph::SCC &, CGSCCAnalysisManager &, |
| LazyCallGraph &, CGSCCUpdateResult &)> |
| Func; |
| }; |
| |
| struct LambdaFunctionPass : public PassInfoMixin<LambdaFunctionPass> { |
| template <typename T> |
| LambdaFunctionPass(T &&Arg) : Func(std::forward<T>(Arg)) {} |
| |
| PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM) { |
| return Func(F, AM); |
| } |
| |
| std::function<PreservedAnalyses(Function &, FunctionAnalysisManager &)> Func; |
| }; |
| |
| std::unique_ptr<Module> parseIR(const char *IR) { |
| // We just use a static context here. This is never called from multiple |
| // threads so it is harmless no matter how it is implemented. We just need |
| // the context to outlive the module which it does. |
| static LLVMContext C; |
| SMDiagnostic Err; |
| return parseAssemblyString(IR, Err, C); |
| } |
| |
| class CGSCCPassManagerTest : public ::testing::Test { |
| protected: |
| LLVMContext Context; |
| FunctionAnalysisManager FAM; |
| CGSCCAnalysisManager CGAM; |
| ModuleAnalysisManager MAM; |
| |
| std::unique_ptr<Module> M; |
| |
| public: |
| CGSCCPassManagerTest() |
| : FAM(/*DebugLogging*/ true), CGAM(/*DebugLogging*/ true), |
| MAM(/*DebugLogging*/ true), |
| M(parseIR( |
| // Define a module with the following call graph, where calls go |
| // out the bottom of nodes and enter the top: |
| // |
| // f |
| // |\ _ |
| // | \ / | |
| // g h1 | |
| // | | | |
| // | h2 | |
| // | | | |
| // | h3 | |
| // | / \_/ |
| // |/ |
| // x |
| // |
| "define void @f() {\n" |
| "entry:\n" |
| " call void @g()\n" |
| " call void @h1()\n" |
| " ret void\n" |
| "}\n" |
| "define void @g() {\n" |
| "entry:\n" |
| " call void @g()\n" |
| " call void @x()\n" |
| " ret void\n" |
| "}\n" |
| "define void @h1() {\n" |
| "entry:\n" |
| " call void @h2()\n" |
| " ret void\n" |
| "}\n" |
| "define void @h2() {\n" |
| "entry:\n" |
| " call void @h3()\n" |
| " call void @x()\n" |
| " ret void\n" |
| "}\n" |
| "define void @h3() {\n" |
| "entry:\n" |
| " call void @h1()\n" |
| " ret void\n" |
| "}\n" |
| "define void @x() {\n" |
| "entry:\n" |
| " ret void\n" |
| "}\n")) { |
| MAM.registerPass([&] { return TargetLibraryAnalysis(); }); |
| MAM.registerPass([&] { return LazyCallGraphAnalysis(); }); |
| MAM.registerPass([&] { return FunctionAnalysisManagerModuleProxy(FAM); }); |
| MAM.registerPass([&] { return CGSCCAnalysisManagerModuleProxy(CGAM); }); |
| CGAM.registerPass([&] { return FunctionAnalysisManagerCGSCCProxy(); }); |
| CGAM.registerPass([&] { return ModuleAnalysisManagerCGSCCProxy(MAM); }); |
| FAM.registerPass([&] { return CGSCCAnalysisManagerFunctionProxy(CGAM); }); |
| FAM.registerPass([&] { return ModuleAnalysisManagerFunctionProxy(MAM); }); |
| } |
| }; |
| |
| TEST_F(CGSCCPassManagerTest, Basic) { |
| int FunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| int ImmutableFunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { |
| return TestImmutableFunctionAnalysis(ImmutableFunctionAnalysisRuns); |
| }); |
| |
| int SCCAnalysisRuns = 0; |
| CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); }); |
| |
| int ModuleAnalysisRuns = 0; |
| MAM.registerPass([&] { return TestModuleAnalysis(ModuleAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| int FunctionPassRunCount1 = 0; |
| FPM1.addPass(LambdaFunctionPass([&](Function &, FunctionAnalysisManager &) { |
| ++FunctionPassRunCount1; |
| return PreservedAnalyses::none(); |
| })); |
| CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| |
| int SCCPassRunCount1 = 0; |
| int AnalyzedInstrCount1 = 0; |
| int AnalyzedSCCFunctionCount1 = 0; |
| int AnalyzedModuleFunctionCount1 = 0; |
| CGPM1.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| ++SCCPassRunCount1; |
| |
| const ModuleAnalysisManager &MAM = |
| AM.getResult<ModuleAnalysisManagerCGSCCProxy>(C, CG).getManager(); |
| FunctionAnalysisManager &FAM = |
| AM.getResult<FunctionAnalysisManagerCGSCCProxy>(C, CG).getManager(); |
| if (TestModuleAnalysis::Result *TMA = |
| MAM.getCachedResult<TestModuleAnalysis>( |
| *C.begin()->getFunction().getParent())) |
| AnalyzedModuleFunctionCount1 += TMA->FunctionCount; |
| |
| TestSCCAnalysis::Result &AR = AM.getResult<TestSCCAnalysis>(C, CG); |
| AnalyzedSCCFunctionCount1 += AR.FunctionCount; |
| for (LazyCallGraph::Node &N : C) { |
| TestFunctionAnalysis::Result &FAR = |
| FAM.getResult<TestFunctionAnalysis>(N.getFunction()); |
| AnalyzedInstrCount1 += FAR.InstructionCount; |
| |
| // Just ensure we get the immutable results. |
| (void)FAM.getResult<TestImmutableFunctionAnalysis>(N.getFunction()); |
| } |
| |
| return PreservedAnalyses::all(); |
| })); |
| |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| int FunctionPassRunCount2 = 0; |
| FPM2.addPass(LambdaFunctionPass([&](Function &, FunctionAnalysisManager &) { |
| ++FunctionPassRunCount2; |
| return PreservedAnalyses::none(); |
| })); |
| CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| FunctionPassManager FPM3(/*DebugLogging*/ true); |
| int FunctionPassRunCount3 = 0; |
| FPM3.addPass(LambdaFunctionPass([&](Function &, FunctionAnalysisManager &) { |
| ++FunctionPassRunCount3; |
| return PreservedAnalyses::none(); |
| })); |
| MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM3))); |
| |
| MPM.run(*M, MAM); |
| |
| EXPECT_EQ(4, SCCPassRunCount1); |
| EXPECT_EQ(6, FunctionPassRunCount1); |
| EXPECT_EQ(6, FunctionPassRunCount2); |
| EXPECT_EQ(6, FunctionPassRunCount3); |
| |
| EXPECT_EQ(1, ModuleAnalysisRuns); |
| EXPECT_EQ(4, SCCAnalysisRuns); |
| EXPECT_EQ(6, FunctionAnalysisRuns); |
| EXPECT_EQ(6, ImmutableFunctionAnalysisRuns); |
| |
| EXPECT_EQ(14, AnalyzedInstrCount1); |
| EXPECT_EQ(6, AnalyzedSCCFunctionCount1); |
| EXPECT_EQ(4 * 6, AnalyzedModuleFunctionCount1); |
| } |
| |
| // Test that an SCC pass which fails to preserve a module analysis does in fact |
| // invalidate that module analysis. |
| TEST_F(CGSCCPassManagerTest, TestSCCPassInvalidatesModuleAnalysis) { |
| int ModuleAnalysisRuns = 0; |
| MAM.registerPass([&] { return TestModuleAnalysis(ModuleAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| |
| // The first CGSCC run we preserve everything and make sure that works and |
| // the module analysis is available in the second CGSCC run from the one |
| // required module pass above. |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| int CountFoundModuleAnalysis1 = 0; |
| CGPM1.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| const auto &MAM = |
| AM.getResult<ModuleAnalysisManagerCGSCCProxy>(C, CG).getManager(); |
| auto *TMA = MAM.getCachedResult<TestModuleAnalysis>( |
| *C.begin()->getFunction().getParent()); |
| |
| if (TMA) |
| ++CountFoundModuleAnalysis1; |
| |
| return PreservedAnalyses::all(); |
| })); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // The second CGSCC run checks that the module analysis got preserved the |
| // previous time and in one SCC fails to preserve it. |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| int CountFoundModuleAnalysis2 = 0; |
| CGPM2.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| const auto &MAM = |
| AM.getResult<ModuleAnalysisManagerCGSCCProxy>(C, CG).getManager(); |
| auto *TMA = MAM.getCachedResult<TestModuleAnalysis>( |
| *C.begin()->getFunction().getParent()); |
| |
| if (TMA) |
| ++CountFoundModuleAnalysis2; |
| |
| // Only fail to preserve analyses on one SCC and make sure that gets |
| // propagated. |
| return C.getName() == "(g)" ? PreservedAnalyses::none() |
| : PreservedAnalyses::all(); |
| })); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| // The third CGSCC run should fail to find a cached module analysis as it |
| // should have been invalidated by the above CGSCC run. |
| CGSCCPassManager CGPM3(/*DebugLogging*/ true); |
| int CountFoundModuleAnalysis3 = 0; |
| CGPM3.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| const auto &MAM = |
| AM.getResult<ModuleAnalysisManagerCGSCCProxy>(C, CG).getManager(); |
| auto *TMA = MAM.getCachedResult<TestModuleAnalysis>( |
| *C.begin()->getFunction().getParent()); |
| |
| if (TMA) |
| ++CountFoundModuleAnalysis3; |
| |
| return PreservedAnalyses::none(); |
| })); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM3))); |
| |
| MPM.run(*M, MAM); |
| |
| EXPECT_EQ(1, ModuleAnalysisRuns); |
| EXPECT_EQ(4, CountFoundModuleAnalysis1); |
| EXPECT_EQ(4, CountFoundModuleAnalysis2); |
| EXPECT_EQ(0, CountFoundModuleAnalysis3); |
| } |
| |
| // Similar to the above, but test that this works for function passes embedded |
| // *within* a CGSCC layer. |
| TEST_F(CGSCCPassManagerTest, TestFunctionPassInsideCGSCCInvalidatesModuleAnalysis) { |
| int ModuleAnalysisRuns = 0; |
| MAM.registerPass([&] { return TestModuleAnalysis(ModuleAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| |
| // The first run we preserve everything and make sure that works and the |
| // module analysis is available in the second run from the one required |
| // module pass above. |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| // Start true and mark false if we ever failed to find a module analysis |
| // because we expect this to succeed for each SCC. |
| bool FoundModuleAnalysis1 = true; |
| FPM1.addPass( |
| LambdaFunctionPass([&](Function &F, FunctionAnalysisManager &AM) { |
| const auto &MAM = |
| AM.getResult<ModuleAnalysisManagerFunctionProxy>(F).getManager(); |
| auto *TMA = MAM.getCachedResult<TestModuleAnalysis>(*F.getParent()); |
| |
| if (!TMA) |
| FoundModuleAnalysis1 = false; |
| |
| return PreservedAnalyses::all(); |
| })); |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // The second run checks that the module analysis got preserved the previous |
| // time and in one function fails to preserve it. |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| // Again, start true and mark false if we ever failed to find a module analysis |
| // because we expect this to succeed for each SCC. |
| bool FoundModuleAnalysis2 = true; |
| FPM2.addPass( |
| LambdaFunctionPass([&](Function &F, FunctionAnalysisManager &AM) { |
| const auto &MAM = |
| AM.getResult<ModuleAnalysisManagerFunctionProxy>(F).getManager(); |
| auto *TMA = MAM.getCachedResult<TestModuleAnalysis>(*F.getParent()); |
| |
| if (!TMA) |
| FoundModuleAnalysis2 = false; |
| |
| // Only fail to preserve analyses on one SCC and make sure that gets |
| // propagated. |
| return F.getName() == "h2" ? PreservedAnalyses::none() |
| : PreservedAnalyses::all(); |
| })); |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| // The third run should fail to find a cached module analysis as it should |
| // have been invalidated by the above run. |
| FunctionPassManager FPM3(/*DebugLogging*/ true); |
| // Start false and mark true if we ever *succeeded* to find a module |
| // analysis, as we expect this to fail for every function. |
| bool FoundModuleAnalysis3 = false; |
| FPM3.addPass( |
| LambdaFunctionPass([&](Function &F, FunctionAnalysisManager &AM) { |
| const auto &MAM = |
| AM.getResult<ModuleAnalysisManagerFunctionProxy>(F).getManager(); |
| auto *TMA = MAM.getCachedResult<TestModuleAnalysis>(*F.getParent()); |
| |
| if (TMA) |
| FoundModuleAnalysis3 = true; |
| |
| return PreservedAnalyses::none(); |
| })); |
| CGSCCPassManager CGPM3(/*DebugLogging*/ true); |
| CGPM3.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM3))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM3))); |
| |
| MPM.run(*M, MAM); |
| |
| EXPECT_EQ(1, ModuleAnalysisRuns); |
| EXPECT_TRUE(FoundModuleAnalysis1); |
| EXPECT_TRUE(FoundModuleAnalysis2); |
| EXPECT_FALSE(FoundModuleAnalysis3); |
| } |
| |
| // Test that a Module pass which fails to preserve an SCC analysis in fact |
| // invalidates that analysis. |
| TEST_F(CGSCCPassManagerTest, TestModulePassInvalidatesSCCAnalysis) { |
| int SCCAnalysisRuns = 0; |
| CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(RequireAnalysisPass<TestSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // Now run a module pass that preserves the LazyCallGraph and the proxy but |
| // not the SCC analysis. |
| MPM.addPass(LambdaModulePass([&](Module &M, ModuleAnalysisManager &) { |
| PreservedAnalyses PA; |
| PA.preserve<LazyCallGraphAnalysis>(); |
| PA.preserve<CGSCCAnalysisManagerModuleProxy>(); |
| PA.preserve<FunctionAnalysisManagerModuleProxy>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again. This |
| // will trigger re-running it. |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(RequireAnalysisPass<TestSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| MPM.run(*M, MAM); |
| // Two runs and four SCCs. |
| EXPECT_EQ(2 * 4, SCCAnalysisRuns); |
| } |
| |
| // Check that marking the SCC analysis preserved is sufficient to avoid |
| // invaliadtion. This should only run the analysis once for each SCC. |
| TEST_F(CGSCCPassManagerTest, TestModulePassCanPreserveSCCAnalysis) { |
| int SCCAnalysisRuns = 0; |
| CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(RequireAnalysisPass<TestSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // Now run a module pass that preserves each of the necessary components |
| // (but not everything). |
| MPM.addPass(LambdaModulePass([&](Module &M, ModuleAnalysisManager &) { |
| PreservedAnalyses PA; |
| PA.preserve<LazyCallGraphAnalysis>(); |
| PA.preserve<CGSCCAnalysisManagerModuleProxy>(); |
| PA.preserve<FunctionAnalysisManagerModuleProxy>(); |
| PA.preserve<TestSCCAnalysis>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again but find |
| // it in the cache. |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(RequireAnalysisPass<TestSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| MPM.run(*M, MAM); |
| // Four SCCs |
| EXPECT_EQ(4, SCCAnalysisRuns); |
| } |
| |
| // Check that even when the analysis is preserved, if the SCC information isn't |
| // we still nuke things because the SCC keys could change. |
| TEST_F(CGSCCPassManagerTest, TestModulePassInvalidatesSCCAnalysisOnCGChange) { |
| int SCCAnalysisRuns = 0; |
| CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(RequireAnalysisPass<TestSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // Now run a module pass that preserves the analysis but not the call |
| // graph or proxy. |
| MPM.addPass(LambdaModulePass([&](Module &M, ModuleAnalysisManager &) { |
| PreservedAnalyses PA; |
| PA.preserve<TestSCCAnalysis>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again. |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(RequireAnalysisPass<TestSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| MPM.run(*M, MAM); |
| // Two runs and four SCCs. |
| EXPECT_EQ(2 * 4, SCCAnalysisRuns); |
| } |
| |
| // Test that an SCC pass which fails to preserve a Function analysis in fact |
| // invalidates that analysis. |
| TEST_F(CGSCCPassManagerTest, TestSCCPassInvalidatesFunctionAnalysis) { |
| int FunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| |
| // Create a very simple module with a single function and SCC to make testing |
| // these issues much easier. |
| std::unique_ptr<Module> M = parseIR("declare void @g()\n" |
| "declare void @h()\n" |
| "define void @f() {\n" |
| "entry:\n" |
| " call void @g()\n" |
| " call void @h()\n" |
| " ret void\n" |
| "}\n"); |
| |
| CGSCCPassManager CGPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| FPM1.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| |
| // Now run a module pass that preserves the LazyCallGraph and proxy but not |
| // the SCC analysis. |
| CGPM.addPass(LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &, |
| LazyCallGraph &, CGSCCUpdateResult &) { |
| PreservedAnalyses PA; |
| PA.preserve<LazyCallGraphAnalysis>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again. This |
| // will trigger re-running it. |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| FPM2.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM))); |
| MPM.run(*M, MAM); |
| EXPECT_EQ(2, FunctionAnalysisRuns); |
| } |
| |
| // Check that marking the SCC analysis preserved is sufficient. This should |
| // only run the analysis once the SCC. |
| TEST_F(CGSCCPassManagerTest, TestSCCPassCanPreserveFunctionAnalysis) { |
| int FunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| |
| // Create a very simple module with a single function and SCC to make testing |
| // these issues much easier. |
| std::unique_ptr<Module> M = parseIR("declare void @g()\n" |
| "declare void @h()\n" |
| "define void @f() {\n" |
| "entry:\n" |
| " call void @g()\n" |
| " call void @h()\n" |
| " ret void\n" |
| "}\n"); |
| |
| CGSCCPassManager CGPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| FPM1.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| |
| // Now run a module pass that preserves each of the necessary components |
| // (but |
| // not everything). |
| CGPM.addPass(LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &, |
| LazyCallGraph &, CGSCCUpdateResult &) { |
| PreservedAnalyses PA; |
| PA.preserve<LazyCallGraphAnalysis>(); |
| PA.preserve<FunctionAnalysisManagerCGSCCProxy>(); |
| PA.preserve<TestFunctionAnalysis>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again but find |
| // it in the cache. |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| FPM2.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM))); |
| MPM.run(*M, MAM); |
| EXPECT_EQ(1, FunctionAnalysisRuns); |
| } |
| |
| // Note that there is no test for invalidating the call graph or other |
| // structure with an SCC pass because there is no mechanism to do that from |
| // withinsuch a pass. Instead, such a pass has to directly update the call |
| // graph structure. |
| |
| // Test that a madule pass invalidates function analyses when the CGSCC proxies |
| // and pass manager. |
| TEST_F(CGSCCPassManagerTest, |
| TestModulePassInvalidatesFunctionAnalysisNestedInCGSCC) { |
| MAM.registerPass([&] { return LazyCallGraphAnalysis(); }); |
| |
| int FunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| FPM1.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // Now run a module pass that preserves the LazyCallGraph and proxies but not |
| // the Function analysis. |
| MPM.addPass(LambdaModulePass([&](Module &M, ModuleAnalysisManager &) { |
| PreservedAnalyses PA; |
| PA.preserve<LazyCallGraphAnalysis>(); |
| PA.preserve<CGSCCAnalysisManagerModuleProxy>(); |
| PA.preserve<FunctionAnalysisManagerCGSCCProxy>(); |
| PA.preserve<FunctionAnalysisManagerModuleProxy>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again. This |
| // will trigger re-running it. |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| FPM2.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| MPM.run(*M, MAM); |
| // Two runs and 6 functions. |
| EXPECT_EQ(2 * 6, FunctionAnalysisRuns); |
| } |
| |
| // Check that by marking the function pass and proxies as preserved, this |
| // propagates all the way through. |
| TEST_F(CGSCCPassManagerTest, |
| TestModulePassCanPreserveFunctionAnalysisNestedInCGSCC) { |
| MAM.registerPass([&] { return LazyCallGraphAnalysis(); }); |
| |
| int FunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| FPM1.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // Now run a module pass that preserves the LazyCallGraph, the proxy, and |
| // the Function analysis. |
| MPM.addPass(LambdaModulePass([&](Module &M, ModuleAnalysisManager &) { |
| PreservedAnalyses PA; |
| PA.preserve<LazyCallGraphAnalysis>(); |
| PA.preserve<CGSCCAnalysisManagerModuleProxy>(); |
| PA.preserve<FunctionAnalysisManagerCGSCCProxy>(); |
| PA.preserve<FunctionAnalysisManagerModuleProxy>(); |
| PA.preserve<TestFunctionAnalysis>(); |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again. This |
| // will trigger re-running it. |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| FPM2.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| MPM.run(*M, MAM); |
| // One run and 6 functions. |
| EXPECT_EQ(6, FunctionAnalysisRuns); |
| } |
| |
| // Check that if the lazy call graph itself isn't preserved we still manage to |
| // invalidate everything. |
| TEST_F(CGSCCPassManagerTest, |
| TestModulePassInvalidatesFunctionAnalysisNestedInCGSCCOnCGChange) { |
| MAM.registerPass([&] { return LazyCallGraphAnalysis(); }); |
| |
| int FunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| // First force the analysis to be run. |
| FunctionPassManager FPM1(/*DebugLogging*/ true); |
| FPM1.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGSCCPassManager CGPM1(/*DebugLogging*/ true); |
| CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1))); |
| |
| // Now run a module pass that preserves the LazyCallGraph but not the |
| // Function analysis. |
| MPM.addPass(LambdaModulePass([&](Module &M, ModuleAnalysisManager &) { |
| PreservedAnalyses PA; |
| return PA; |
| })); |
| |
| // And now a second CGSCC run which requires the SCC analysis again. This |
| // will trigger re-running it. |
| FunctionPassManager FPM2(/*DebugLogging*/ true); |
| FPM2.addPass(RequireAnalysisPass<TestFunctionAnalysis, Function>()); |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM2))); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| |
| MPM.run(*M, MAM); |
| // Two runs and 6 functions. |
| EXPECT_EQ(2 * 6, FunctionAnalysisRuns); |
| } |
| |
| /// A test CGSCC-level analysis pass which caches in its result another |
| /// analysis pass and uses it to serve queries. This requires the result to |
| /// invalidate itself when its dependency is invalidated. |
| /// |
| /// FIXME: Currently this doesn't also depend on a function analysis, and if it |
| /// did we would fail to invalidate it correctly. |
| struct TestIndirectSCCAnalysis |
| : public AnalysisInfoMixin<TestIndirectSCCAnalysis> { |
| struct Result { |
| Result(TestSCCAnalysis::Result &SCCDep, TestModuleAnalysis::Result &MDep) |
| : SCCDep(SCCDep), MDep(MDep) {} |
| TestSCCAnalysis::Result &SCCDep; |
| TestModuleAnalysis::Result &MDep; |
| |
| bool invalidate(LazyCallGraph::SCC &C, const PreservedAnalyses &PA, |
| CGSCCAnalysisManager::Invalidator &Inv) { |
| auto PAC = PA.getChecker<TestIndirectSCCAnalysis>(); |
| return !(PAC.preserved() || |
| PAC.preservedSet<AllAnalysesOn<LazyCallGraph::SCC>>()) || |
| Inv.invalidate<TestSCCAnalysis>(C, PA); |
| } |
| }; |
| |
| TestIndirectSCCAnalysis(int &Runs) : Runs(Runs) {} |
| |
| /// Run the analysis pass over the function and return a result. |
| Result run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG) { |
| ++Runs; |
| auto &SCCDep = AM.getResult<TestSCCAnalysis>(C, CG); |
| |
| auto &ModuleProxy = AM.getResult<ModuleAnalysisManagerCGSCCProxy>(C, CG); |
| const ModuleAnalysisManager &MAM = ModuleProxy.getManager(); |
| // For the test, we insist that the module analysis starts off in the |
| // cache. |
| auto &MDep = *MAM.getCachedResult<TestModuleAnalysis>( |
| *C.begin()->getFunction().getParent()); |
| // Register the dependency as module analysis dependencies have to be |
| // pre-registered on the proxy. |
| ModuleProxy.registerOuterAnalysisInvalidation<TestModuleAnalysis, |
| TestIndirectSCCAnalysis>(); |
| |
| return Result(SCCDep, MDep); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestIndirectSCCAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestIndirectSCCAnalysis::Key; |
| |
| /// A test analysis pass which caches in its result the result from the above |
| /// indirect analysis pass. |
| /// |
| /// This allows us to ensure that whenever an analysis pass is invalidated due |
| /// to dependencies (especially dependencies across IR units that trigger |
| /// asynchronous invalidation) we correctly detect that this may in turn cause |
| /// other analysis to be invalidated. |
| struct TestDoublyIndirectSCCAnalysis |
| : public AnalysisInfoMixin<TestDoublyIndirectSCCAnalysis> { |
| struct Result { |
| Result(TestIndirectSCCAnalysis::Result &IDep) : IDep(IDep) {} |
| TestIndirectSCCAnalysis::Result &IDep; |
| |
| bool invalidate(LazyCallGraph::SCC &C, const PreservedAnalyses &PA, |
| CGSCCAnalysisManager::Invalidator &Inv) { |
| auto PAC = PA.getChecker<TestDoublyIndirectSCCAnalysis>(); |
| return !(PAC.preserved() || |
| PAC.preservedSet<AllAnalysesOn<LazyCallGraph::SCC>>()) || |
| Inv.invalidate<TestIndirectSCCAnalysis>(C, PA); |
| } |
| }; |
| |
| TestDoublyIndirectSCCAnalysis(int &Runs) : Runs(Runs) {} |
| |
| /// Run the analysis pass over the function and return a result. |
| Result run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG) { |
| ++Runs; |
| auto &IDep = AM.getResult<TestIndirectSCCAnalysis>(C, CG); |
| return Result(IDep); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestDoublyIndirectSCCAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestDoublyIndirectSCCAnalysis::Key; |
| |
| /// A test analysis pass which caches results from three different IR unit |
| /// layers and requires intermediate layers to correctly propagate the entire |
| /// distance. |
| struct TestIndirectFunctionAnalysis |
| : public AnalysisInfoMixin<TestIndirectFunctionAnalysis> { |
| struct Result { |
| Result(TestFunctionAnalysis::Result &FDep, TestModuleAnalysis::Result &MDep, |
| TestSCCAnalysis::Result &SCCDep) |
| : FDep(FDep), MDep(MDep), SCCDep(SCCDep) {} |
| TestFunctionAnalysis::Result &FDep; |
| TestModuleAnalysis::Result &MDep; |
| TestSCCAnalysis::Result &SCCDep; |
| |
| bool invalidate(Function &F, const PreservedAnalyses &PA, |
| FunctionAnalysisManager::Invalidator &Inv) { |
| auto PAC = PA.getChecker<TestIndirectFunctionAnalysis>(); |
| return !(PAC.preserved() || |
| PAC.preservedSet<AllAnalysesOn<Function>>()) || |
| Inv.invalidate<TestFunctionAnalysis>(F, PA); |
| } |
| }; |
| |
| TestIndirectFunctionAnalysis(int &Runs) : Runs(Runs) {} |
| |
| /// Run the analysis pass over the function and return a result. |
| Result run(Function &F, FunctionAnalysisManager &AM) { |
| ++Runs; |
| auto &FDep = AM.getResult<TestFunctionAnalysis>(F); |
| |
| auto &ModuleProxy = AM.getResult<ModuleAnalysisManagerFunctionProxy>(F); |
| const ModuleAnalysisManager &MAM = ModuleProxy.getManager(); |
| // For the test, we insist that the module analysis starts off in the |
| // cache. |
| auto &MDep = *MAM.getCachedResult<TestModuleAnalysis>(*F.getParent()); |
| // Register the dependency as module analysis dependencies have to be |
| // pre-registered on the proxy. |
| ModuleProxy.registerOuterAnalysisInvalidation< |
| TestModuleAnalysis, TestIndirectFunctionAnalysis>(); |
| |
| // For thet test we assume this is run inside a CGSCC pass manager. |
| const LazyCallGraph &CG = |
| *MAM.getCachedResult<LazyCallGraphAnalysis>(*F.getParent()); |
| auto &CGSCCProxy = AM.getResult<CGSCCAnalysisManagerFunctionProxy>(F); |
| const CGSCCAnalysisManager &CGAM = CGSCCProxy.getManager(); |
| // For the test, we insist that the CGSCC analysis starts off in the cache. |
| auto &SCCDep = |
| *CGAM.getCachedResult<TestSCCAnalysis>(*CG.lookupSCC(*CG.lookup(F))); |
| // Register the dependency as CGSCC analysis dependencies have to be |
| // pre-registered on the proxy. |
| CGSCCProxy.registerOuterAnalysisInvalidation< |
| TestSCCAnalysis, TestIndirectFunctionAnalysis>(); |
| |
| return Result(FDep, MDep, SCCDep); |
| } |
| |
| private: |
| friend AnalysisInfoMixin<TestIndirectFunctionAnalysis>; |
| static AnalysisKey Key; |
| |
| int &Runs; |
| }; |
| |
| AnalysisKey TestIndirectFunctionAnalysis::Key; |
| |
| TEST_F(CGSCCPassManagerTest, TestIndirectAnalysisInvalidation) { |
| int ModuleAnalysisRuns = 0; |
| MAM.registerPass([&] { return TestModuleAnalysis(ModuleAnalysisRuns); }); |
| |
| int SCCAnalysisRuns = 0, IndirectSCCAnalysisRuns = 0, |
| DoublyIndirectSCCAnalysisRuns = 0; |
| CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); }); |
| CGAM.registerPass( |
| [&] { return TestIndirectSCCAnalysis(IndirectSCCAnalysisRuns); }); |
| CGAM.registerPass([&] { |
| return TestDoublyIndirectSCCAnalysis(DoublyIndirectSCCAnalysisRuns); |
| }); |
| |
| int FunctionAnalysisRuns = 0, IndirectFunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| FAM.registerPass([&] { |
| return TestIndirectFunctionAnalysis(IndirectFunctionAnalysisRuns); |
| }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| int FunctionCount = 0; |
| CGSCCPassManager CGPM(/*DebugLogging*/ true); |
| // First just use the analysis to get the function count and preserve |
| // everything. |
| CGPM.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &) { |
| auto &DoublyIndirectResult = |
| AM.getResult<TestDoublyIndirectSCCAnalysis>(C, CG); |
| auto &IndirectResult = DoublyIndirectResult.IDep; |
| FunctionCount += IndirectResult.SCCDep.FunctionCount; |
| return PreservedAnalyses::all(); |
| })); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireAnalysisPass<TestIndirectFunctionAnalysis, Function>())); |
| |
| // Next, invalidate |
| // - both analyses for the (f) and (x) SCCs, |
| // - just the underlying (indirect) analysis for (g) SCC, and |
| // - just the direct analysis for (h1,h2,h3) SCC. |
| CGPM.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &) { |
| auto &DoublyIndirectResult = |
| AM.getResult<TestDoublyIndirectSCCAnalysis>(C, CG); |
| auto &IndirectResult = DoublyIndirectResult.IDep; |
| FunctionCount += IndirectResult.SCCDep.FunctionCount; |
| auto PA = PreservedAnalyses::none(); |
| PA.preserve<FunctionAnalysisManagerCGSCCProxy>(); |
| PA.preserveSet<AllAnalysesOn<Function>>(); |
| if (C.getName() == "(g)") |
| PA.preserve<TestSCCAnalysis>(); |
| else if (C.getName() == "(h3, h1, h2)") |
| PA.preserve<TestIndirectSCCAnalysis>(); |
| return PA; |
| })); |
| // Finally, use the analysis again on each SCC (and function), forcing |
| // re-computation for all of them. |
| CGPM.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &) { |
| auto &DoublyIndirectResult = |
| AM.getResult<TestDoublyIndirectSCCAnalysis>(C, CG); |
| auto &IndirectResult = DoublyIndirectResult.IDep; |
| FunctionCount += IndirectResult.SCCDep.FunctionCount; |
| return PreservedAnalyses::all(); |
| })); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireAnalysisPass<TestIndirectFunctionAnalysis, Function>())); |
| |
| // Create a second CGSCC pass manager. This will cause the module-level |
| // invalidation to occur, which will force yet another invalidation of the |
| // indirect SCC-level analysis as the module analysis it depends on gets |
| // invalidated. |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &) { |
| auto &DoublyIndirectResult = |
| AM.getResult<TestDoublyIndirectSCCAnalysis>(C, CG); |
| auto &IndirectResult = DoublyIndirectResult.IDep; |
| FunctionCount += IndirectResult.SCCDep.FunctionCount; |
| return PreservedAnalyses::all(); |
| })); |
| CGPM2.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireAnalysisPass<TestIndirectFunctionAnalysis, Function>())); |
| |
| // Add a requires pass to populate the module analysis and then our CGSCC |
| // pass pipeline. |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM))); |
| // Now require the module analysis again (it will have been invalidated once) |
| // and then use it again from our second CGSCC pipeline.. |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| MPM.run(*M, MAM); |
| |
| // There are generally two possible runs for each of the four SCCs. But |
| // for one SCC, we only invalidate the indirect analysis so the base one |
| // only gets run seven times. |
| EXPECT_EQ(7, SCCAnalysisRuns); |
| // The module analysis pass should be run twice here. |
| EXPECT_EQ(2, ModuleAnalysisRuns); |
| // The indirect analysis is invalidated (either directly or indirectly) three |
| // times for each of four SCCs. |
| EXPECT_EQ(3 * 4, IndirectSCCAnalysisRuns); |
| EXPECT_EQ(3 * 4, DoublyIndirectSCCAnalysisRuns); |
| |
| // We run the indirect function analysis once per function the first time. |
| // Then we re-run it for every SCC but "(g)". Then we re-run it for every |
| // function again. |
| EXPECT_EQ(6 + 5 + 6, IndirectFunctionAnalysisRuns); |
| |
| // Four passes count each of six functions once (via SCCs). |
| EXPECT_EQ(4 * 6, FunctionCount); |
| } |
| |
| TEST_F(CGSCCPassManagerTest, TestAnalysisInvalidationCGSCCUpdate) { |
| int ModuleAnalysisRuns = 0; |
| MAM.registerPass([&] { return TestModuleAnalysis(ModuleAnalysisRuns); }); |
| |
| int SCCAnalysisRuns = 0, IndirectSCCAnalysisRuns = 0, |
| DoublyIndirectSCCAnalysisRuns = 0; |
| CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); }); |
| CGAM.registerPass( |
| [&] { return TestIndirectSCCAnalysis(IndirectSCCAnalysisRuns); }); |
| CGAM.registerPass([&] { |
| return TestDoublyIndirectSCCAnalysis(DoublyIndirectSCCAnalysisRuns); |
| }); |
| |
| int FunctionAnalysisRuns = 0, IndirectFunctionAnalysisRuns = 0; |
| FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); }); |
| FAM.registerPass([&] { |
| return TestIndirectFunctionAnalysis(IndirectFunctionAnalysisRuns); |
| }); |
| |
| ModulePassManager MPM(/*DebugLogging*/ true); |
| |
| CGSCCPassManager CGPM(/*DebugLogging*/ true); |
| // First just use the analysis to get the function count and preserve |
| // everything. |
| using RequireTestIndirectFunctionAnalysisPass = |
| RequireAnalysisPass<TestIndirectFunctionAnalysis, Function>; |
| using RequireTestDoublyIndirectSCCAnalysisPass = |
| RequireAnalysisPass<TestDoublyIndirectSCCAnalysis, LazyCallGraph::SCC, |
| CGSCCAnalysisManager, LazyCallGraph &, |
| CGSCCUpdateResult &>; |
| CGPM.addPass(RequireTestDoublyIndirectSCCAnalysisPass()); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireTestIndirectFunctionAnalysisPass())); |
| |
| // Next, we inject an SCC pass that invalidates everything for the `(h3, h1, |
| // h2)` SCC but also deletes the call edge from `h2` to `h3` and updates the |
| // CG. This should successfully invalidate (and force to be re-run) all the |
| // analyses for that SCC and for the functions. |
| CGPM.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| (void)AM.getResult<TestDoublyIndirectSCCAnalysis>(C, CG); |
| if (C.getName() != "(h3, h1, h2)") |
| return PreservedAnalyses::all(); |
| |
| // Build the preserved set. |
| auto PA = PreservedAnalyses::none(); |
| PA.preserve<FunctionAnalysisManagerCGSCCProxy>(); |
| PA.preserve<TestIndirectSCCAnalysis>(); |
| PA.preserve<TestDoublyIndirectSCCAnalysis>(); |
| |
| // Delete the call from `h2` to `h3`. |
| auto &H2N = *llvm::find_if( |
| C, [](LazyCallGraph::Node &N) { return N.getName() == "h2"; }); |
| auto &H2F = H2N.getFunction(); |
| auto &H3F = *cast<CallInst>(H2F.begin()->begin())->getCalledFunction(); |
| assert(H3F.getName() == "h3" && "Wrong called function!"); |
| H2F.begin()->begin()->eraseFromParent(); |
| // Insert a bitcast of `h3` so that we retain a ref edge to it. |
| (void)CastInst::CreatePointerCast(&H3F, |
| Type::getInt8PtrTy(H2F.getContext()), |
| "dummy", &*H2F.begin()->begin()); |
| |
| // Now update the call graph. |
| auto &NewC = |
| updateCGAndAnalysisManagerForFunctionPass(CG, C, H2N, AM, UR); |
| assert(&NewC != &C && "Should get a new SCC due to update!"); |
| (void)&NewC; |
| |
| return PA; |
| })); |
| // Now use the analysis again on each SCC and function, forcing |
| // re-computation for all of them. |
| CGPM.addPass(RequireTestDoublyIndirectSCCAnalysisPass()); |
| CGPM.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireTestIndirectFunctionAnalysisPass())); |
| |
| // Create another CGSCC pipeline that requires all the analyses again. |
| CGSCCPassManager CGPM2(/*DebugLogging*/ true); |
| CGPM2.addPass(RequireTestDoublyIndirectSCCAnalysisPass()); |
| CGPM2.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireTestIndirectFunctionAnalysisPass())); |
| |
| // Next we inject an SCC pass that finds the `(h2)` SCC, adds a call to `h3` |
| // back to `h2`, and then invalidates everything for what will then be the |
| // `(h3, h1, h2)` SCC again. |
| CGSCCPassManager CGPM3(/*DebugLogging*/ true); |
| CGPM3.addPass( |
| LambdaSCCPass([&](LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM, |
| LazyCallGraph &CG, CGSCCUpdateResult &UR) { |
| (void)AM.getResult<TestDoublyIndirectSCCAnalysis>(C, CG); |
| if (C.getName() != "(h2)") |
| return PreservedAnalyses::all(); |
| |
| // Build the preserved set. |
| auto PA = PreservedAnalyses::none(); |
| PA.preserve<FunctionAnalysisManagerCGSCCProxy>(); |
| PA.preserve<TestIndirectSCCAnalysis>(); |
| PA.preserve<TestDoublyIndirectSCCAnalysis>(); |
| |
| // Delete the bitcast of `h3` that we added earlier. |
| auto &H2N = *C.begin(); |
| auto &H2F = H2N.getFunction(); |
| auto &H3F = *cast<Function>(cast<BitCastInst>(H2F.begin()->begin())->getOperand(0)); |
| assert(H3F.getName() == "h3" && "Wrong called function!"); |
| H2F.begin()->begin()->eraseFromParent(); |
| // And insert a call to `h3`. |
| (void)CallInst::Create(&H3F, {}, "", &*H2F.begin()->begin()); |
| |
| // Now update the call graph. |
| auto &NewC = |
| updateCGAndAnalysisManagerForFunctionPass(CG, C, H2N, AM, UR); |
| assert(&NewC != &C && "Should get a new SCC due to update!"); |
| (void)&NewC; |
| |
| return PA; |
| })); |
| // Now use the analysis again on each SCC and function, forcing |
| // re-computation for all of them. |
| CGPM3.addPass(RequireTestDoublyIndirectSCCAnalysisPass()); |
| CGPM3.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireTestIndirectFunctionAnalysisPass())); |
| |
| // Create a second CGSCC pass manager. This will cause the module-level |
| // invalidation to occur, which will force yet another invalidation of the |
| // indirect SCC-level analysis as the module analysis it depends on gets |
| // invalidated. |
| CGSCCPassManager CGPM4(/*DebugLogging*/ true); |
| CGPM4.addPass(RequireTestDoublyIndirectSCCAnalysisPass()); |
| CGPM4.addPass(createCGSCCToFunctionPassAdaptor( |
| RequireTestIndirectFunctionAnalysisPass())); |
| |
| // Add a requires pass to populate the module analysis and then one of our |
| // CGSCC pipelines. Repeat for all four CGSCC pipelines. |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM))); |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM2))); |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM3))); |
| MPM.addPass(RequireAnalysisPass<TestModuleAnalysis, Module>()); |
| MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM4))); |
| MPM.run(*M, MAM); |
| |
| // We run over four SCCs the first time. But then we split an SCC into three. |
| // And then we merge those three back into one. |
| EXPECT_EQ(4 + 3 + 1, SCCAnalysisRuns); |
| // The module analysis pass should be run three times. |
| EXPECT_EQ(3, ModuleAnalysisRuns); |
| // We run over four SCCs the first time. Then over the two new ones. Then the |
| // entire module is invalidated causing a full run over all seven. Then we |
| // fold three SCCs back to one, and then run over the whole module again. |
| EXPECT_EQ(4 + 2 + 7 + 1 + 4, IndirectSCCAnalysisRuns); |
| EXPECT_EQ(4 + 2 + 7 + 1 + 4, DoublyIndirectSCCAnalysisRuns); |
| |
| // First we run over all six functions. Then we re-run it over three when we |
| // split their SCCs. Then we re-run over the whole module. Then we re-run |
| // over three functions merged back into a single SCC, and then over the |
| // whole module again. |
| EXPECT_EQ(6 + 3 + 6 + 3 + 6, FunctionAnalysisRuns); |
| |
| // Re run the function analysis over the entire module, and then re-run it |
| // over the `(h3, h1, h2)` SCC due to invalidation. Then we re-run it over |
| // the entire module, then the three functions merged back into a single SCC, |
| // and then over the whole module. |
| EXPECT_EQ(6 + 3 + 6 + 3 + 6, IndirectFunctionAnalysisRuns); |
| } |
| } |
