1 //===- llvm/unittest/IR/PassManager.cpp - PassManager tests ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Assembly/Parser.h"
11 #include "llvm/IR/Function.h"
12 #include "llvm/IR/LLVMContext.h"
13 #include "llvm/IR/Module.h"
14 #include "llvm/IR/PassManager.h"
15 #include "llvm/Support/SourceMgr.h"
16 #include "gtest/gtest.h"
22 class TestAnalysisPass {
25 Result(int Count) : InstructionCount(Count) {}
29 /// \brief Returns an opaque, unique ID for this pass type.
30 static void *ID() { return (void *)&PassID; }
32 TestAnalysisPass(int &Runs) : Runs(Runs) {}
34 /// \brief Run the analysis pass over the function and return a result.
35 Result run(Function *F, FunctionAnalysisManager *AM) {
38 for (Function::iterator BBI = F->begin(), BBE = F->end(); BBI != BBE; ++BBI)
39 for (BasicBlock::iterator II = BBI->begin(), IE = BBI->end(); II != IE;
46 /// \brief Private static data to provide unique ID.
52 char TestAnalysisPass::PassID;
54 struct TestModulePass {
55 TestModulePass(int &RunCount) : RunCount(RunCount) {}
57 PreservedAnalyses run(Module *M) {
59 return PreservedAnalyses::none();
65 struct TestPreservingModulePass {
66 PreservedAnalyses run(Module *M) {
67 return PreservedAnalyses::all();
71 struct TestMinPreservingModulePass {
72 PreservedAnalyses run(Module *M) {
74 PA.preserve<FunctionAnalysisManagerModuleProxy>();
79 struct TestFunctionPass {
80 TestFunctionPass(int &RunCount, int &AnalyzedInstrCount)
81 : RunCount(RunCount), AnalyzedInstrCount(AnalyzedInstrCount) {}
83 PreservedAnalyses run(Function *F, FunctionAnalysisManager *AM) {
86 const TestAnalysisPass::Result &AR = AM->getResult<TestAnalysisPass>(F);
87 AnalyzedInstrCount += AR.InstructionCount;
89 return PreservedAnalyses::all();
93 int &AnalyzedInstrCount;
96 // A test function pass that invalidates all function analyses for a function
97 // with a specific name.
98 struct TestInvalidationFunctionPass {
99 TestInvalidationFunctionPass(StringRef FunctionName) : Name(FunctionName) {}
101 PreservedAnalyses run(Function *F) {
102 return F->getName() == Name ? PreservedAnalyses::none()
103 : PreservedAnalyses::all();
109 Module *parseIR(const char *IR) {
110 LLVMContext &C = getGlobalContext();
112 return ParseAssemblyString(IR, 0, Err, C);
115 class PassManagerTest : public ::testing::Test {
121 : M(parseIR("define void @f() {\n"
127 "define void @g() {\n"
130 "define void @h() {\n"
135 TEST_F(PassManagerTest, Basic) {
136 FunctionAnalysisManager FAM;
137 int AnalysisRuns = 0;
138 FAM.registerPass(TestAnalysisPass(AnalysisRuns));
140 ModuleAnalysisManager MAM;
141 MAM.registerPass(FunctionAnalysisManagerModuleProxy(FAM));
143 ModulePassManager MPM;
145 // Count the runs over a Function.
146 FunctionPassManager FPM1;
147 int FunctionPassRunCount1 = 0;
148 int AnalyzedInstrCount1 = 0;
149 FPM1.addPass(TestFunctionPass(FunctionPassRunCount1, AnalyzedInstrCount1));
150 MPM.addPass(createModuleToFunctionPassAdaptor(FPM1));
152 // Count the runs over a module.
153 int ModulePassRunCount = 0;
154 MPM.addPass(TestModulePass(ModulePassRunCount));
156 // Count the runs over a Function in a separate manager.
157 FunctionPassManager FPM2;
158 int FunctionPassRunCount2 = 0;
159 int AnalyzedInstrCount2 = 0;
160 FPM2.addPass(TestFunctionPass(FunctionPassRunCount2, AnalyzedInstrCount2));
161 MPM.addPass(createModuleToFunctionPassAdaptor(FPM2));
163 // A third function pass manager but with only preserving intervening passes
164 // and with a function pass that invalidates exactly one analysis.
165 MPM.addPass(TestPreservingModulePass());
166 FunctionPassManager FPM3;
167 int FunctionPassRunCount3 = 0;
168 int AnalyzedInstrCount3 = 0;
169 FPM3.addPass(TestFunctionPass(FunctionPassRunCount3, AnalyzedInstrCount3));
170 FPM3.addPass(TestInvalidationFunctionPass("f"));
171 MPM.addPass(createModuleToFunctionPassAdaptor(FPM3));
173 // A fourth function pass manager but with a minimal intervening passes.
174 MPM.addPass(TestMinPreservingModulePass());
175 FunctionPassManager FPM4;
176 int FunctionPassRunCount4 = 0;
177 int AnalyzedInstrCount4 = 0;
178 FPM4.addPass(TestFunctionPass(FunctionPassRunCount4, AnalyzedInstrCount4));
179 MPM.addPass(createModuleToFunctionPassAdaptor(FPM4));
181 MPM.run(M.get(), &MAM);
183 // Validate module pass counters.
184 EXPECT_EQ(1, ModulePassRunCount);
186 // Validate all function pass counter sets are the same.
187 EXPECT_EQ(3, FunctionPassRunCount1);
188 EXPECT_EQ(5, AnalyzedInstrCount1);
189 EXPECT_EQ(3, FunctionPassRunCount2);
190 EXPECT_EQ(5, AnalyzedInstrCount2);
191 EXPECT_EQ(3, FunctionPassRunCount3);
192 EXPECT_EQ(5, AnalyzedInstrCount3);
193 EXPECT_EQ(3, FunctionPassRunCount4);
194 EXPECT_EQ(5, AnalyzedInstrCount4);
196 // Validate the analysis counters:
197 // first run over 3 functions, then module pass invalidates
198 // second run over 3 functions, nothing invalidates
199 // third run over 0 functions, but 1 function invalidated
200 // fourth run over 1 function
201 EXPECT_EQ(7, AnalysisRuns);