312 lines
9.2 KiB
C++
312 lines
9.2 KiB
C++
//===- CGSCCPassManagerTest.cpp -------------------------------------------===//
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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/Analysis/LazyCallGraph.h"
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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/InstIterator.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 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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static StringRef name() { return "TestModuleAnalysis"; }
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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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return Result(M.size());
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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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class TestSCCAnalysis {
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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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static StringRef name() { return "TestSCCAnalysis"; }
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TestSCCAnalysis(int &Runs) : Runs(Runs) {}
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Result run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM) {
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++Runs;
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return Result(C.size());
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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 TestSCCAnalysis::PassID;
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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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static void *ID() { return (void *)&PassID; }
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static StringRef name() { return "TestFunctionAnalysis"; }
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TestFunctionAnalysis(int &Runs) : Runs(Runs) {}
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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 (Instruction &I : instructions(F)) {
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(void)I;
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++Count;
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}
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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 TestFunctionAnalysis::PassID;
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class TestImmutableFunctionAnalysis {
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public:
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struct Result {
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bool invalidate(Function &, const PreservedAnalyses &) { return false; }
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};
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static void *ID() { return (void *)&PassID; }
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static StringRef name() { return "TestImmutableFunctionAnalysis"; }
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TestImmutableFunctionAnalysis(int &Runs) : Runs(Runs) {}
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Result run(Function &F, FunctionAnalysisManager &AM) {
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++Runs;
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return Result();
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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 TestImmutableFunctionAnalysis::PassID;
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struct TestModulePass {
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TestModulePass(int &RunCount) : RunCount(RunCount) {}
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM) {
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++RunCount;
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(void)AM.getResult<TestModuleAnalysis>(M);
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return PreservedAnalyses::all();
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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 TestSCCPass {
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TestSCCPass(int &RunCount, int &AnalyzedInstrCount,
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int &AnalyzedSCCFunctionCount, int &AnalyzedModuleFunctionCount,
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bool OnlyUseCachedResults = false)
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: RunCount(RunCount), AnalyzedInstrCount(AnalyzedInstrCount),
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AnalyzedSCCFunctionCount(AnalyzedSCCFunctionCount),
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AnalyzedModuleFunctionCount(AnalyzedModuleFunctionCount),
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OnlyUseCachedResults(OnlyUseCachedResults) {}
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PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM) {
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++RunCount;
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const ModuleAnalysisManager &MAM =
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AM.getResult<ModuleAnalysisManagerCGSCCProxy>(C).getManager();
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FunctionAnalysisManager &FAM =
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AM.getResult<FunctionAnalysisManagerCGSCCProxy>(C).getManager();
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if (TestModuleAnalysis::Result *TMA =
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MAM.getCachedResult<TestModuleAnalysis>(
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*C.begin()->getFunction().getParent()))
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AnalyzedModuleFunctionCount += 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 (TestSCCAnalysis::Result *AR = AM.getCachedResult<TestSCCAnalysis>(C))
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AnalyzedSCCFunctionCount += AR->FunctionCount;
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for (LazyCallGraph::Node &N : C)
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if (TestFunctionAnalysis::Result *FAR =
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FAM.getCachedResult<TestFunctionAnalysis>(N.getFunction()))
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AnalyzedInstrCount += FAR->InstructionCount;
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} else {
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// Typical path just runs the analysis as needed.
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TestSCCAnalysis::Result &AR = AM.getResult<TestSCCAnalysis>(C);
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AnalyzedSCCFunctionCount += AR.FunctionCount;
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for (LazyCallGraph::Node &N : C) {
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TestFunctionAnalysis::Result &FAR =
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FAM.getResult<TestFunctionAnalysis>(N.getFunction());
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AnalyzedInstrCount += FAR.InstructionCount;
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// Just ensure we get the immutable results.
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(void)FAM.getResult<TestImmutableFunctionAnalysis>(N.getFunction());
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}
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}
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return PreservedAnalyses::all();
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}
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static StringRef name() { return "TestSCCPass"; }
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int &RunCount;
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int &AnalyzedInstrCount;
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int &AnalyzedSCCFunctionCount;
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int &AnalyzedModuleFunctionCount;
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bool OnlyUseCachedResults;
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};
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struct TestFunctionPass {
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TestFunctionPass(int &RunCount) : RunCount(RunCount) {}
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PreservedAnalyses run(Function &F, AnalysisManager<Function> &) {
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++RunCount;
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return PreservedAnalyses::none();
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}
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static StringRef name() { return "TestFunctionPass"; }
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int &RunCount;
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};
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std::unique_ptr<Module> parseIR(const char *IR) {
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// We just use a static context here. This is never called from multiple
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// threads so it is harmless no matter how it is implemented. We just need
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// the context to outlive the module which it does.
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static LLVMContext C;
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SMDiagnostic Err;
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return parseAssemblyString(IR, Err, C);
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}
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TEST(CGSCCPassManagerTest, Basic) {
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auto 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 @h1()\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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"entry:\n"
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" call void @g()\n"
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" call void @x()\n"
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" ret void\n"
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"}\n"
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"define void @h1() {\n"
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"entry:\n"
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" call void @h2()\n"
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" ret void\n"
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"}\n"
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"define void @h2() {\n"
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"entry:\n"
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" call void @h3()\n"
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" call void @x()\n"
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" ret void\n"
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"}\n"
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"define void @h3() {\n"
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"entry:\n"
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" call void @h1()\n"
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" ret void\n"
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"}\n"
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"define void @x() {\n"
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"entry:\n"
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" ret void\n"
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"}\n");
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FunctionAnalysisManager FAM(/*DebugLogging*/ true);
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int FunctionAnalysisRuns = 0;
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FAM.registerPass([&] { return TestFunctionAnalysis(FunctionAnalysisRuns); });
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int ImmutableFunctionAnalysisRuns = 0;
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FAM.registerPass([&] {
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return TestImmutableFunctionAnalysis(ImmutableFunctionAnalysisRuns);
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});
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CGSCCAnalysisManager CGAM(/*DebugLogging*/ true);
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int SCCAnalysisRuns = 0;
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CGAM.registerPass([&] { return TestSCCAnalysis(SCCAnalysisRuns); });
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ModuleAnalysisManager MAM(/*DebugLogging*/ true);
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int ModuleAnalysisRuns = 0;
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MAM.registerPass([&] { return LazyCallGraphAnalysis(); });
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MAM.registerPass([&] { return TestModuleAnalysis(ModuleAnalysisRuns); });
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MAM.registerPass([&] { return FunctionAnalysisManagerModuleProxy(FAM); });
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MAM.registerPass([&] { return CGSCCAnalysisManagerModuleProxy(CGAM); });
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CGAM.registerPass([&] { return FunctionAnalysisManagerCGSCCProxy(FAM); });
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CGAM.registerPass([&] { return ModuleAnalysisManagerCGSCCProxy(MAM); });
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FAM.registerPass([&] { return CGSCCAnalysisManagerFunctionProxy(CGAM); });
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FAM.registerPass([&] { return ModuleAnalysisManagerFunctionProxy(MAM); });
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ModulePassManager MPM(/*DebugLogging*/ true);
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int ModulePassRunCount1 = 0;
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MPM.addPass(TestModulePass(ModulePassRunCount1));
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CGSCCPassManager CGPM1(/*DebugLogging*/ true);
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int SCCPassRunCount1 = 0;
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int AnalyzedInstrCount1 = 0;
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int AnalyzedSCCFunctionCount1 = 0;
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int AnalyzedModuleFunctionCount1 = 0;
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CGPM1.addPass(TestSCCPass(SCCPassRunCount1, AnalyzedInstrCount1,
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AnalyzedSCCFunctionCount1,
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AnalyzedModuleFunctionCount1));
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FunctionPassManager FPM1(/*DebugLogging*/ true);
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int FunctionPassRunCount1 = 0;
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FPM1.addPass(TestFunctionPass(FunctionPassRunCount1));
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CGPM1.addPass(createCGSCCToFunctionPassAdaptor(std::move(FPM1)));
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MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM1)));
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MPM.run(*M, MAM);
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EXPECT_EQ(1, ModulePassRunCount1);
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EXPECT_EQ(1, ModuleAnalysisRuns);
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EXPECT_EQ(4, SCCAnalysisRuns);
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EXPECT_EQ(6, FunctionAnalysisRuns);
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EXPECT_EQ(6, ImmutableFunctionAnalysisRuns);
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EXPECT_EQ(4, SCCPassRunCount1);
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EXPECT_EQ(14, AnalyzedInstrCount1);
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EXPECT_EQ(6, AnalyzedSCCFunctionCount1);
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EXPECT_EQ(4 * 6, AnalyzedModuleFunctionCount1);
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}
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}
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