llvm-mirror/unittests/IR/PassManagerTest.cpp
Craig Topper b00824c629 [C++11] Use 'nullptr'.
llvm-svn: 210442
2014-06-08 22:29:17 +00:00

345 lines
11 KiB
C++

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