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345 lines
11 KiB
C++
345 lines
11 KiB
C++
//===- llvm/unittest/IR/PassManager.cpp - PassManager tests ---------------===//
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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/AsmParser/Parser.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Support/SourceMgr.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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class TestFunctionAnalysis {
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public:
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struct Result {
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Result(int Count) : InstructionCount(Count) {}
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int InstructionCount;
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};
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/// \brief Returns an opaque, unique ID for this pass type.
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static void *ID() { return (void *)&PassID; }
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TestFunctionAnalysis(int &Runs) : Runs(Runs) {}
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/// \brief Run the analysis pass over the function and return a result.
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Result run(Function *F, FunctionAnalysisManager *AM) {
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++Runs;
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int Count = 0;
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for (Function::iterator BBI = F->begin(), BBE = F->end(); BBI != BBE; ++BBI)
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for (BasicBlock::iterator II = BBI->begin(), IE = BBI->end(); II != IE;
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++II)
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++Count;
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return Result(Count);
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}
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private:
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/// \brief Private static data to provide unique ID.
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static char PassID;
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int &Runs;
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};
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char TestFunctionAnalysis::PassID;
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class TestModuleAnalysis {
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public:
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struct Result {
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Result(int Count) : FunctionCount(Count) {}
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int FunctionCount;
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};
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static void *ID() { return (void *)&PassID; }
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TestModuleAnalysis(int &Runs) : Runs(Runs) {}
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Result run(Module *M, ModuleAnalysisManager *AM) {
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++Runs;
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int Count = 0;
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for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
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++Count;
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return Result(Count);
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}
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private:
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static char PassID;
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int &Runs;
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};
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char TestModuleAnalysis::PassID;
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struct TestModulePass {
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TestModulePass(int &RunCount) : RunCount(RunCount) {}
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PreservedAnalyses run(Module *M) {
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++RunCount;
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return PreservedAnalyses::none();
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}
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static StringRef name() { return "TestModulePass"; }
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int &RunCount;
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};
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struct TestPreservingModulePass {
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PreservedAnalyses run(Module *M) { return PreservedAnalyses::all(); }
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static StringRef name() { return "TestPreservingModulePass"; }
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};
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struct TestMinPreservingModulePass {
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PreservedAnalyses run(Module *M, ModuleAnalysisManager *AM) {
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PreservedAnalyses PA;
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// Force running an analysis.
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(void)AM->getResult<TestModuleAnalysis>(M);
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PA.preserve<FunctionAnalysisManagerModuleProxy>();
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return PA;
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}
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static StringRef name() { return "TestMinPreservingModulePass"; }
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};
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struct TestFunctionPass {
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TestFunctionPass(int &RunCount, int &AnalyzedInstrCount,
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int &AnalyzedFunctionCount,
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bool OnlyUseCachedResults = false)
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: RunCount(RunCount), AnalyzedInstrCount(AnalyzedInstrCount),
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AnalyzedFunctionCount(AnalyzedFunctionCount),
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OnlyUseCachedResults(OnlyUseCachedResults) {}
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PreservedAnalyses run(Function *F, FunctionAnalysisManager *AM) {
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++RunCount;
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const ModuleAnalysisManager &MAM =
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AM->getResult<ModuleAnalysisManagerFunctionProxy>(F).getManager();
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if (TestModuleAnalysis::Result *TMA =
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MAM.getCachedResult<TestModuleAnalysis>(F->getParent()))
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AnalyzedFunctionCount += TMA->FunctionCount;
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if (OnlyUseCachedResults) {
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// Hack to force the use of the cached interface.
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if (TestFunctionAnalysis::Result *AR =
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AM->getCachedResult<TestFunctionAnalysis>(F))
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AnalyzedInstrCount += AR->InstructionCount;
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} else {
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// Typical path just runs the analysis as needed.
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TestFunctionAnalysis::Result &AR = AM->getResult<TestFunctionAnalysis>(F);
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AnalyzedInstrCount += AR.InstructionCount;
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}
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return PreservedAnalyses::all();
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}
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static StringRef name() { return "TestFunctionPass"; }
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int &RunCount;
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int &AnalyzedInstrCount;
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int &AnalyzedFunctionCount;
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bool OnlyUseCachedResults;
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};
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// A test function pass that invalidates all function analyses for a function
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// with a specific name.
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struct TestInvalidationFunctionPass {
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TestInvalidationFunctionPass(StringRef FunctionName) : Name(FunctionName) {}
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PreservedAnalyses run(Function *F) {
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return F->getName() == Name ? PreservedAnalyses::none()
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: PreservedAnalyses::all();
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}
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static StringRef name() { return "TestInvalidationFunctionPass"; }
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StringRef Name;
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};
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Module *parseIR(const char *IR) {
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LLVMContext &C = getGlobalContext();
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SMDiagnostic Err;
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return ParseAssemblyString(IR, nullptr, Err, C);
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}
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class PassManagerTest : public ::testing::Test {
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protected:
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std::unique_ptr<Module> M;
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public:
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PassManagerTest()
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: M(parseIR("define void @f() {\n"
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"entry:\n"
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" call void @g()\n"
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" call void @h()\n"
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" ret void\n"
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"}\n"
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"define void @g() {\n"
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" ret void\n"
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"}\n"
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"define void @h() {\n"
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" ret void\n"
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"}\n")) {}
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};
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TEST_F(PassManagerTest, BasicPreservedAnalyses) {
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PreservedAnalyses PA1 = PreservedAnalyses();
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EXPECT_FALSE(PA1.preserved<TestFunctionAnalysis>());
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EXPECT_FALSE(PA1.preserved<TestModuleAnalysis>());
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PreservedAnalyses PA2 = PreservedAnalyses::none();
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EXPECT_FALSE(PA2.preserved<TestFunctionAnalysis>());
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EXPECT_FALSE(PA2.preserved<TestModuleAnalysis>());
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PreservedAnalyses PA3 = PreservedAnalyses::all();
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EXPECT_TRUE(PA3.preserved<TestFunctionAnalysis>());
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EXPECT_TRUE(PA3.preserved<TestModuleAnalysis>());
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PreservedAnalyses PA4 = PA1;
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EXPECT_FALSE(PA4.preserved<TestFunctionAnalysis>());
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EXPECT_FALSE(PA4.preserved<TestModuleAnalysis>());
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PA4 = PA3;
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EXPECT_TRUE(PA4.preserved<TestFunctionAnalysis>());
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EXPECT_TRUE(PA4.preserved<TestModuleAnalysis>());
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PA4 = std::move(PA2);
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EXPECT_FALSE(PA4.preserved<TestFunctionAnalysis>());
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EXPECT_FALSE(PA4.preserved<TestModuleAnalysis>());
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PA4.preserve<TestFunctionAnalysis>();
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EXPECT_TRUE(PA4.preserved<TestFunctionAnalysis>());
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EXPECT_FALSE(PA4.preserved<TestModuleAnalysis>());
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PA1.preserve<TestModuleAnalysis>();
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EXPECT_FALSE(PA1.preserved<TestFunctionAnalysis>());
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EXPECT_TRUE(PA1.preserved<TestModuleAnalysis>());
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PA1.preserve<TestFunctionAnalysis>();
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EXPECT_TRUE(PA1.preserved<TestFunctionAnalysis>());
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EXPECT_TRUE(PA1.preserved<TestModuleAnalysis>());
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PA1.intersect(PA4);
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EXPECT_TRUE(PA1.preserved<TestFunctionAnalysis>());
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EXPECT_FALSE(PA1.preserved<TestModuleAnalysis>());
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}
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TEST_F(PassManagerTest, Basic) {
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FunctionAnalysisManager FAM;
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int FunctionAnalysisRuns = 0;
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FAM.registerPass(TestFunctionAnalysis(FunctionAnalysisRuns));
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ModuleAnalysisManager MAM;
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int ModuleAnalysisRuns = 0;
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MAM.registerPass(TestModuleAnalysis(ModuleAnalysisRuns));
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MAM.registerPass(FunctionAnalysisManagerModuleProxy(FAM));
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FAM.registerPass(ModuleAnalysisManagerFunctionProxy(MAM));
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ModulePassManager MPM;
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// Count the runs over a Function.
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int FunctionPassRunCount1 = 0;
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int AnalyzedInstrCount1 = 0;
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int AnalyzedFunctionCount1 = 0;
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{
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// Pointless scoped copy to test move assignment.
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ModulePassManager NestedMPM;
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FunctionPassManager FPM;
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{
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// Pointless scope to test move assignment.
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FunctionPassManager NestedFPM;
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NestedFPM.addPass(TestFunctionPass(FunctionPassRunCount1, AnalyzedInstrCount1,
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AnalyzedFunctionCount1));
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FPM = std::move(NestedFPM);
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}
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NestedMPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
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MPM = std::move(NestedMPM);
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}
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// Count the runs over a module.
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int ModulePassRunCount = 0;
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MPM.addPass(TestModulePass(ModulePassRunCount));
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// Count the runs over a Function in a separate manager.
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int FunctionPassRunCount2 = 0;
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int AnalyzedInstrCount2 = 0;
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int AnalyzedFunctionCount2 = 0;
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{
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FunctionPassManager FPM;
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FPM.addPass(TestFunctionPass(FunctionPassRunCount2, AnalyzedInstrCount2,
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AnalyzedFunctionCount2));
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MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
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}
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// A third function pass manager but with only preserving intervening passes
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// and with a function pass that invalidates exactly one analysis.
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MPM.addPass(TestPreservingModulePass());
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int FunctionPassRunCount3 = 0;
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int AnalyzedInstrCount3 = 0;
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int AnalyzedFunctionCount3 = 0;
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{
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FunctionPassManager FPM;
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FPM.addPass(TestFunctionPass(FunctionPassRunCount3, AnalyzedInstrCount3,
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AnalyzedFunctionCount3));
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FPM.addPass(TestInvalidationFunctionPass("f"));
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MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
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}
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// A fourth function pass manager but with a minimal intervening passes.
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MPM.addPass(TestMinPreservingModulePass());
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int FunctionPassRunCount4 = 0;
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int AnalyzedInstrCount4 = 0;
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int AnalyzedFunctionCount4 = 0;
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{
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FunctionPassManager FPM;
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FPM.addPass(TestFunctionPass(FunctionPassRunCount4, AnalyzedInstrCount4,
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AnalyzedFunctionCount4));
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MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
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}
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// A fifth function pass manager but which uses only cached results.
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int FunctionPassRunCount5 = 0;
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int AnalyzedInstrCount5 = 0;
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int AnalyzedFunctionCount5 = 0;
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{
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FunctionPassManager FPM;
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FPM.addPass(TestInvalidationFunctionPass("f"));
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FPM.addPass(TestFunctionPass(FunctionPassRunCount5, AnalyzedInstrCount5,
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AnalyzedFunctionCount5,
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/*OnlyUseCachedResults=*/true));
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MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
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}
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MPM.run(M.get(), &MAM);
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// Validate module pass counters.
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EXPECT_EQ(1, ModulePassRunCount);
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// Validate all function pass counter sets are the same.
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EXPECT_EQ(3, FunctionPassRunCount1);
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EXPECT_EQ(5, AnalyzedInstrCount1);
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EXPECT_EQ(0, AnalyzedFunctionCount1);
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EXPECT_EQ(3, FunctionPassRunCount2);
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EXPECT_EQ(5, AnalyzedInstrCount2);
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EXPECT_EQ(0, AnalyzedFunctionCount2);
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EXPECT_EQ(3, FunctionPassRunCount3);
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EXPECT_EQ(5, AnalyzedInstrCount3);
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EXPECT_EQ(0, AnalyzedFunctionCount3);
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EXPECT_EQ(3, FunctionPassRunCount4);
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EXPECT_EQ(5, AnalyzedInstrCount4);
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EXPECT_EQ(0, AnalyzedFunctionCount4);
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EXPECT_EQ(3, FunctionPassRunCount5);
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EXPECT_EQ(2, AnalyzedInstrCount5); // Only 'g' and 'h' were cached.
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EXPECT_EQ(0, AnalyzedFunctionCount5);
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// Validate the analysis counters:
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// first run over 3 functions, then module pass invalidates
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// second run over 3 functions, nothing invalidates
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// third run over 0 functions, but 1 function invalidated
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// fourth run over 1 function
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EXPECT_EQ(7, FunctionAnalysisRuns);
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EXPECT_EQ(1, ModuleAnalysisRuns);
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}
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}
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