1 //===- JITTest.cpp - Unit tests for the JIT -------------------------------===//
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/ExecutionEngine/JIT.h"
11 #include "llvm/ADT/SmallPtrSet.h"
12 #include "llvm/AsmParser/Parser.h"
13 #include "llvm/Bitcode/ReaderWriter.h"
14 #include "llvm/ExecutionEngine/JITMemoryManager.h"
15 #include "llvm/IR/BasicBlock.h"
16 #include "llvm/IR/Constant.h"
17 #include "llvm/IR/Constants.h"
18 #include "llvm/IR/DerivedTypes.h"
19 #include "llvm/IR/Function.h"
20 #include "llvm/IR/GlobalValue.h"
21 #include "llvm/IR/GlobalVariable.h"
22 #include "llvm/IR/IRBuilder.h"
23 #include "llvm/IR/LLVMContext.h"
24 #include "llvm/IR/Module.h"
25 #include "llvm/IR/Type.h"
26 #include "llvm/IR/TypeBuilder.h"
27 #include "llvm/Support/MemoryBuffer.h"
28 #include "llvm/Support/SourceMgr.h"
29 #include "llvm/Support/TargetSelect.h"
30 #include "gtest/gtest.h"
35 // This variable is intentionally defined differently in the statically-compiled
36 // program from the IR input to the JIT to assert that the JIT doesn't use its
37 // definition. Note that this variable must be defined even on platforms where
38 // JIT tests are disabled as it is referenced from the .def file.
39 extern "C" int32_t JITTest_AvailableExternallyGlobal;
40 int32_t JITTest_AvailableExternallyGlobal LLVM_ATTRIBUTE_USED = 42;
42 // This function is intentionally defined differently in the statically-compiled
43 // program from the IR input to the JIT to assert that the JIT doesn't use its
44 // definition. Note that this function must be defined even on platforms where
45 // JIT tests are disabled as it is referenced from the .def file.
46 extern "C" int32_t JITTest_AvailableExternallyFunction() LLVM_ATTRIBUTE_USED;
47 extern "C" int32_t JITTest_AvailableExternallyFunction() {
53 // Tests on ARM, PowerPC and SystemZ disabled as we're running the old jit
54 #if !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__) \
55 && !defined(__aarch64__)
57 Function *makeReturnGlobal(std::string Name, GlobalVariable *G, Module *M) {
58 std::vector<Type*> params;
59 FunctionType *FTy = FunctionType::get(G->getType()->getElementType(),
61 Function *F = Function::Create(FTy, GlobalValue::ExternalLinkage, Name, M);
62 BasicBlock *Entry = BasicBlock::Create(M->getContext(), "entry", F);
63 IRBuilder<> builder(Entry);
64 Value *Load = builder.CreateLoad(G);
65 Type *GTy = G->getType()->getElementType();
66 Value *Add = builder.CreateAdd(Load, ConstantInt::get(GTy, 1LL));
67 builder.CreateStore(Add, G);
68 builder.CreateRet(Add);
72 std::string DumpFunction(const Function *F) {
74 raw_string_ostream(Result) << "" << *F;
78 class RecordingJITMemoryManager : public JITMemoryManager {
79 const std::unique_ptr<JITMemoryManager> Base;
82 RecordingJITMemoryManager()
83 : Base(JITMemoryManager::CreateDefaultMemManager()) {
86 virtual void *getPointerToNamedFunction(const std::string &Name,
87 bool AbortOnFailure = true) {
88 return Base->getPointerToNamedFunction(Name, AbortOnFailure);
91 virtual void setMemoryWritable() { Base->setMemoryWritable(); }
92 virtual void setMemoryExecutable() { Base->setMemoryExecutable(); }
93 virtual void setPoisonMemory(bool poison) { Base->setPoisonMemory(poison); }
94 virtual void AllocateGOT() { Base->AllocateGOT(); }
95 virtual uint8_t *getGOTBase() const { return Base->getGOTBase(); }
96 struct StartFunctionBodyCall {
97 StartFunctionBodyCall(uint8_t *Result, const Function *F,
98 uintptr_t ActualSize, uintptr_t ActualSizeResult)
99 : Result(Result), F(F), F_dump(DumpFunction(F)),
100 ActualSize(ActualSize), ActualSizeResult(ActualSizeResult) {}
104 uintptr_t ActualSize;
105 uintptr_t ActualSizeResult;
107 std::vector<StartFunctionBodyCall> startFunctionBodyCalls;
108 virtual uint8_t *startFunctionBody(const Function *F,
109 uintptr_t &ActualSize) {
110 uintptr_t InitialActualSize = ActualSize;
111 uint8_t *Result = Base->startFunctionBody(F, ActualSize);
112 startFunctionBodyCalls.push_back(
113 StartFunctionBodyCall(Result, F, InitialActualSize, ActualSize));
117 uint8_t *allocateStub(const GlobalValue *F, unsigned StubSize,
118 unsigned Alignment) override {
120 return Base->allocateStub(F, StubSize, Alignment);
122 struct EndFunctionBodyCall {
123 EndFunctionBodyCall(const Function *F, uint8_t *FunctionStart,
124 uint8_t *FunctionEnd)
125 : F(F), F_dump(DumpFunction(F)),
126 FunctionStart(FunctionStart), FunctionEnd(FunctionEnd) {}
129 uint8_t *FunctionStart;
130 uint8_t *FunctionEnd;
132 std::vector<EndFunctionBodyCall> endFunctionBodyCalls;
133 virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart,
134 uint8_t *FunctionEnd) {
135 endFunctionBodyCalls.push_back(
136 EndFunctionBodyCall(F, FunctionStart, FunctionEnd));
137 Base->endFunctionBody(F, FunctionStart, FunctionEnd);
139 virtual uint8_t *allocateDataSection(
140 uintptr_t Size, unsigned Alignment, unsigned SectionID,
141 StringRef SectionName, bool IsReadOnly) {
142 return Base->allocateDataSection(
143 Size, Alignment, SectionID, SectionName, IsReadOnly);
145 virtual uint8_t *allocateCodeSection(
146 uintptr_t Size, unsigned Alignment, unsigned SectionID,
147 StringRef SectionName) {
148 return Base->allocateCodeSection(
149 Size, Alignment, SectionID, SectionName);
151 virtual bool finalizeMemory(std::string *ErrMsg) { return false; }
152 virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) {
153 return Base->allocateSpace(Size, Alignment);
155 virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) {
156 return Base->allocateGlobal(Size, Alignment);
158 struct DeallocateFunctionBodyCall {
159 DeallocateFunctionBodyCall(const void *Body) : Body(Body) {}
162 std::vector<DeallocateFunctionBodyCall> deallocateFunctionBodyCalls;
163 virtual void deallocateFunctionBody(void *Body) {
164 deallocateFunctionBodyCalls.push_back(DeallocateFunctionBodyCall(Body));
165 Base->deallocateFunctionBody(Body);
169 std::unique_ptr<Module> loadAssembly(LLVMContext &C, const char *Assembly) {
171 std::unique_ptr<Module> M = parseAssemblyString(Assembly, Error, C);
173 raw_string_ostream os(errMsg);
175 EXPECT_TRUE((bool)M) << os.str();
179 class JITTest : public testing::Test {
181 virtual RecordingJITMemoryManager *createMemoryManager() {
182 return new RecordingJITMemoryManager;
185 virtual void SetUp() {
186 std::unique_ptr<Module> Owner = make_unique<Module>("<main>", Context);
188 RJMM = createMemoryManager();
189 RJMM->setPoisonMemory(true);
191 TargetOptions Options;
192 TheJIT.reset(EngineBuilder(std::move(Owner))
193 .setEngineKind(EngineKind::JIT)
194 .setJITMemoryManager(RJMM)
196 .setTargetOptions(Options)
198 ASSERT_TRUE(TheJIT.get() != nullptr) << Error;
201 void LoadAssembly(const char *assembly) {
202 M = loadAssembly(Context, assembly).release();
206 Module *M; // Owned by ExecutionEngine.
207 RecordingJITMemoryManager *RJMM;
208 std::unique_ptr<ExecutionEngine> TheJIT;
211 // Regression test for a bug. The JIT used to allocate globals inside the same
212 // memory block used for the function, and when the function code was freed,
213 // the global was left in the same place. This test allocates a function
214 // that uses and global, deallocates it, and then makes sure that the global
215 // stays alive after that.
216 TEST(JIT, GlobalInFunction) {
218 std::unique_ptr<Module> Owner = make_unique<Module>("<main>", context);
219 Module *M = Owner.get();
221 JITMemoryManager *MemMgr = JITMemoryManager::CreateDefaultMemManager();
222 // Tell the memory manager to poison freed memory so that accessing freed
223 // memory is more easily tested.
224 MemMgr->setPoisonMemory(true);
226 std::unique_ptr<ExecutionEngine> JIT(EngineBuilder(std::move(Owner))
227 .setEngineKind(EngineKind::JIT)
229 .setJITMemoryManager(MemMgr)
230 // The next line enables the fix:
231 .setAllocateGVsWithCode(false)
233 ASSERT_EQ(Error, "");
235 // Create a global variable.
236 Type *GTy = Type::getInt32Ty(context);
237 GlobalVariable *G = new GlobalVariable(
240 false, // Not constant.
241 GlobalValue::InternalLinkage,
242 Constant::getNullValue(GTy),
245 // Make a function that points to a global.
246 Function *F1 = makeReturnGlobal("F1", G, M);
248 // Get the pointer to the native code to force it to JIT the function and
249 // allocate space for the global.
251 reinterpret_cast<void(*)()>((intptr_t)JIT->getPointerToFunction(F1));
253 // Since F1 was codegen'd, a pointer to G should be available.
254 int32_t *GPtr = (int32_t*)JIT->getPointerToGlobalIfAvailable(G);
255 ASSERT_NE((int32_t*)nullptr, GPtr);
258 // F1() should increment G.
262 // Make a second function identical to the first, referring to the same
264 Function *F2 = makeReturnGlobal("F2", G, M);
266 reinterpret_cast<void(*)()>((intptr_t)JIT->getPointerToFunction(F2));
268 // F2() should increment G.
273 JIT->freeMachineCodeForFunction(F1);
275 // F2() should *still* increment G.
280 int PlusOne(int arg) {
284 TEST_F(JITTest, FarCallToKnownFunction) {
285 // x86-64 can only make direct calls to functions within 32 bits of
286 // the current PC. To call anything farther away, we have to load
287 // the address into a register and call through the register. The
288 // current JIT does this by allocating a stub for any far call.
289 // There was a bug in which the JIT tried to emit a direct call when
290 // the target was already in the JIT's global mappings and lazy
291 // compilation was disabled.
293 Function *KnownFunction = Function::Create(
294 TypeBuilder<int(int), false>::get(Context),
295 GlobalValue::ExternalLinkage, "known", M);
296 TheJIT->addGlobalMapping(KnownFunction, (void*)(intptr_t)PlusOne);
298 // int test() { return known(7); }
299 Function *TestFunction = Function::Create(
300 TypeBuilder<int(), false>::get(Context),
301 GlobalValue::ExternalLinkage, "test", M);
302 BasicBlock *Entry = BasicBlock::Create(Context, "entry", TestFunction);
303 IRBuilder<> Builder(Entry);
304 Value *result = Builder.CreateCall(
306 ConstantInt::get(TypeBuilder<int, false>::get(Context), 7));
307 Builder.CreateRet(result);
309 TheJIT->DisableLazyCompilation(true);
310 int (*TestFunctionPtr)() = reinterpret_cast<int(*)()>(
311 (intptr_t)TheJIT->getPointerToFunction(TestFunction));
312 // This used to crash in trying to call PlusOne().
313 EXPECT_EQ(8, TestFunctionPtr());
316 // Test a function C which calls A and B which call each other.
317 TEST_F(JITTest, NonLazyCompilationStillNeedsStubs) {
318 TheJIT->DisableLazyCompilation(true);
320 FunctionType *Func1Ty =
321 cast<FunctionType>(TypeBuilder<void(void), false>::get(Context));
322 std::vector<Type*> arg_types;
323 arg_types.push_back(Type::getInt1Ty(Context));
324 FunctionType *FuncTy = FunctionType::get(
325 Type::getVoidTy(Context), arg_types, false);
326 Function *Func1 = Function::Create(Func1Ty, Function::ExternalLinkage,
328 Function *Func2 = Function::Create(FuncTy, Function::InternalLinkage,
330 Function *Func3 = Function::Create(FuncTy, Function::InternalLinkage,
332 BasicBlock *Block1 = BasicBlock::Create(Context, "block1", Func1);
333 BasicBlock *Block2 = BasicBlock::Create(Context, "block2", Func2);
334 BasicBlock *True2 = BasicBlock::Create(Context, "cond_true", Func2);
335 BasicBlock *False2 = BasicBlock::Create(Context, "cond_false", Func2);
336 BasicBlock *Block3 = BasicBlock::Create(Context, "block3", Func3);
337 BasicBlock *True3 = BasicBlock::Create(Context, "cond_true", Func3);
338 BasicBlock *False3 = BasicBlock::Create(Context, "cond_false", Func3);
340 // Make Func1 call Func2(0) and Func3(0).
341 IRBuilder<> Builder(Block1);
342 Builder.CreateCall(Func2, ConstantInt::getTrue(Context));
343 Builder.CreateCall(Func3, ConstantInt::getTrue(Context));
344 Builder.CreateRetVoid();
346 // void Func2(bool b) { if (b) { Func3(false); return; } return; }
347 Builder.SetInsertPoint(Block2);
348 Builder.CreateCondBr(Func2->arg_begin(), True2, False2);
349 Builder.SetInsertPoint(True2);
350 Builder.CreateCall(Func3, ConstantInt::getFalse(Context));
351 Builder.CreateRetVoid();
352 Builder.SetInsertPoint(False2);
353 Builder.CreateRetVoid();
355 // void Func3(bool b) { if (b) { Func2(false); return; } return; }
356 Builder.SetInsertPoint(Block3);
357 Builder.CreateCondBr(Func3->arg_begin(), True3, False3);
358 Builder.SetInsertPoint(True3);
359 Builder.CreateCall(Func2, ConstantInt::getFalse(Context));
360 Builder.CreateRetVoid();
361 Builder.SetInsertPoint(False3);
362 Builder.CreateRetVoid();
364 // Compile the function to native code
366 reinterpret_cast<void(*)()>((intptr_t)TheJIT->getPointerToFunction(Func1));
371 // Regression test for PR5162. This used to trigger an AssertingVH inside the
372 // JIT's Function to stub mapping.
373 TEST_F(JITTest, NonLazyLeaksNoStubs) {
374 TheJIT->DisableLazyCompilation(true);
376 // Create two functions with a single basic block each.
377 FunctionType *FuncTy =
378 cast<FunctionType>(TypeBuilder<int(), false>::get(Context));
379 Function *Func1 = Function::Create(FuncTy, Function::ExternalLinkage,
381 Function *Func2 = Function::Create(FuncTy, Function::InternalLinkage,
383 BasicBlock *Block1 = BasicBlock::Create(Context, "block1", Func1);
384 BasicBlock *Block2 = BasicBlock::Create(Context, "block2", Func2);
386 // The first function calls the second and returns the result
387 IRBuilder<> Builder(Block1);
388 Value *Result = Builder.CreateCall(Func2);
389 Builder.CreateRet(Result);
391 // The second function just returns a constant
392 Builder.SetInsertPoint(Block2);
393 Builder.CreateRet(ConstantInt::get(TypeBuilder<int, false>::get(Context),42));
395 // Compile the function to native code
396 (void)TheJIT->getPointerToFunction(Func1);
398 // Free the JIT state for the functions
399 TheJIT->freeMachineCodeForFunction(Func1);
400 TheJIT->freeMachineCodeForFunction(Func2);
402 // Delete the first function (and show that is has no users)
403 EXPECT_EQ(Func1->getNumUses(), 0u);
404 Func1->eraseFromParent();
406 // Delete the second function (and show that it has no users - it had one,
407 // func1 but that's gone now)
408 EXPECT_EQ(Func2->getNumUses(), 0u);
409 Func2->eraseFromParent();
412 TEST_F(JITTest, ModuleDeletion) {
413 TheJIT->DisableLazyCompilation(false);
414 LoadAssembly("define void @main() { "
415 " call i32 @computeVal() "
419 "define internal i32 @computeVal() { "
422 Function *func = M->getFunction("main");
423 TheJIT->getPointerToFunction(func);
424 TheJIT->removeModule(M);
427 SmallPtrSet<const void*, 2> FunctionsDeallocated;
428 for (unsigned i = 0, e = RJMM->deallocateFunctionBodyCalls.size();
430 FunctionsDeallocated.insert(RJMM->deallocateFunctionBodyCalls[i].Body);
432 for (unsigned i = 0, e = RJMM->startFunctionBodyCalls.size(); i != e; ++i) {
433 EXPECT_TRUE(FunctionsDeallocated.count(
434 RJMM->startFunctionBodyCalls[i].Result))
435 << "Function leaked: \n" << RJMM->startFunctionBodyCalls[i].F_dump;
437 EXPECT_EQ(RJMM->startFunctionBodyCalls.size(),
438 RJMM->deallocateFunctionBodyCalls.size());
441 // ARM, MIPS and PPC still emit stubs for calls since the target may be
442 // too far away to call directly. This #if can probably be removed when
443 // http://llvm.org/PR5201 is fixed.
444 #if !defined(__arm__) && !defined(__mips__) && \
445 !defined(__powerpc__) && !defined(__ppc__) && !defined(__aarch64__)
446 typedef int (*FooPtr) ();
448 TEST_F(JITTest, NoStubs) {
449 LoadAssembly("define void @bar() {"
454 "define i32 @foo() {"
460 "define i32 @main() {"
462 "%0 = call i32 @foo()"
466 Function *foo = M->getFunction("foo");
467 uintptr_t tmp = (uintptr_t)(TheJIT->getPointerToFunction(foo));
468 FooPtr ptr = (FooPtr)(tmp);
472 // We should now allocate no more stubs, we have the code to foo
473 // and the existing stub for bar.
474 int stubsBefore = RJMM->stubsAllocated;
475 Function *func = M->getFunction("main");
476 TheJIT->getPointerToFunction(func);
478 Function *bar = M->getFunction("bar");
479 TheJIT->getPointerToFunction(bar);
481 ASSERT_EQ(stubsBefore, RJMM->stubsAllocated);
483 #endif // !ARM && !PPC
485 TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
486 TheJIT->DisableLazyCompilation(true);
487 LoadAssembly("define i8()* @get_foo_addr() { "
491 "define i8 @foo() { "
494 Function *F_get_foo_addr = M->getFunction("get_foo_addr");
496 typedef char(*fooT)();
497 fooT (*get_foo_addr)() = reinterpret_cast<fooT(*)()>(
498 (intptr_t)TheJIT->getPointerToFunction(F_get_foo_addr));
499 fooT foo_addr = get_foo_addr();
501 // Now free get_foo_addr. This should not free the machine code for foo or
502 // any call stub returned as foo's canonical address.
503 TheJIT->freeMachineCodeForFunction(F_get_foo_addr);
505 // Check by calling the reported address of foo.
506 EXPECT_EQ(42, foo_addr());
508 // The reported address should also be the same as the result of a subsequent
509 // getPointerToFunction(foo).
511 // Fails until PR5126 is fixed:
512 Function *F_foo = M->getFunction("foo");
513 fooT foo = reinterpret_cast<fooT>(
514 (intptr_t)TheJIT->getPointerToFunction(F_foo));
515 EXPECT_EQ((intptr_t)foo, (intptr_t)foo_addr);
519 // ARM does not have an implementation of replaceMachineCodeForFunction(),
520 // so recompileAndRelinkFunction doesn't work.
521 #if !defined(__arm__) && !defined(__aarch64__)
522 TEST_F(JITTest, FunctionIsRecompiledAndRelinked) {
523 Function *F = Function::Create(TypeBuilder<int(void), false>::get(Context),
524 GlobalValue::ExternalLinkage, "test", M);
525 BasicBlock *Entry = BasicBlock::Create(Context, "entry", F);
526 IRBuilder<> Builder(Entry);
527 Value *Val = ConstantInt::get(TypeBuilder<int, false>::get(Context), 1);
528 Builder.CreateRet(Val);
530 TheJIT->DisableLazyCompilation(true);
531 // Compile the function once, and make sure it works.
532 int (*OrigFPtr)() = reinterpret_cast<int(*)()>(
533 (intptr_t)TheJIT->recompileAndRelinkFunction(F));
534 EXPECT_EQ(1, OrigFPtr());
536 // Now change the function to return a different value.
537 Entry->eraseFromParent();
538 BasicBlock *NewEntry = BasicBlock::Create(Context, "new_entry", F);
539 Builder.SetInsertPoint(NewEntry);
540 Val = ConstantInt::get(TypeBuilder<int, false>::get(Context), 2);
541 Builder.CreateRet(Val);
542 // Recompile it, which should produce a new function pointer _and_ update the
544 int (*NewFPtr)() = reinterpret_cast<int(*)()>(
545 (intptr_t)TheJIT->recompileAndRelinkFunction(F));
547 EXPECT_EQ(2, NewFPtr())
548 << "The new pointer should call the new version of the function";
549 EXPECT_EQ(2, OrigFPtr())
550 << "The old pointer's target should now jump to the new version";
552 #endif // !defined(__arm__)
554 TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
555 TheJIT->DisableLazyCompilation(true);
556 LoadAssembly("@JITTest_AvailableExternallyGlobal = "
557 " available_externally global i32 7 "
559 "define i32 @loader() { "
560 " %result = load i32* @JITTest_AvailableExternallyGlobal "
563 Function *loaderIR = M->getFunction("loader");
565 int32_t (*loader)() = reinterpret_cast<int32_t(*)()>(
566 (intptr_t)TheJIT->getPointerToFunction(loaderIR));
567 EXPECT_EQ(42, loader()) << "func should return 42 from the external global,"
568 << " not 7 from the IR version.";
571 TEST_F(JITTest, AvailableExternallyFunctionIsntCompiled) {
572 TheJIT->DisableLazyCompilation(true);
573 LoadAssembly("define available_externally i32 "
574 " @JITTest_AvailableExternallyFunction() { "
578 "define i32 @func() { "
579 " %result = tail call i32 "
580 " @JITTest_AvailableExternallyFunction() "
583 Function *funcIR = M->getFunction("func");
585 int32_t (*func)() = reinterpret_cast<int32_t(*)()>(
586 (intptr_t)TheJIT->getPointerToFunction(funcIR));
587 EXPECT_EQ(42, func()) << "func should return 42 from the static version,"
588 << " not 7 from the IR version.";
591 TEST_F(JITTest, EscapedLazyStubStillCallable) {
592 TheJIT->DisableLazyCompilation(false);
593 LoadAssembly("define internal i32 @stubbed() { "
597 "define i32()* @get_stub() { "
598 " ret i32()* @stubbed "
600 typedef int32_t(*StubTy)();
602 // Call get_stub() to get the address of @stubbed without actually JITting it.
603 Function *get_stubIR = M->getFunction("get_stub");
604 StubTy (*get_stub)() = reinterpret_cast<StubTy(*)()>(
605 (intptr_t)TheJIT->getPointerToFunction(get_stubIR));
606 StubTy stubbed = get_stub();
607 // Now get_stubIR is the only reference to stubbed's stub.
608 get_stubIR->eraseFromParent();
609 // Now there are no references inside the JIT, but we've got a pointer outside
610 // it. The stub should be callable and return the right value.
611 EXPECT_EQ(42, stubbed());
614 // Converts the LLVM assembly to bitcode and returns it in a std::string. An
615 // empty string indicates an error.
616 std::string AssembleToBitcode(LLVMContext &Context, const char *Assembly) {
617 std::unique_ptr<Module> TempModule = loadAssembly(Context, Assembly);
622 raw_string_ostream OS(Result);
623 WriteBitcodeToFile(TempModule.get(), OS);
628 // Returns a newly-created ExecutionEngine that reads the bitcode in 'Bitcode'
629 // lazily. The associated Module (owned by the ExecutionEngine) is returned in
630 // M. Both will be NULL on an error. Bitcode must live at least as long as the
632 ExecutionEngine *getJITFromBitcode(
633 LLVMContext &Context, const std::string &Bitcode, Module *&M) {
634 // c_str() is null-terminated like MemoryBuffer::getMemBuffer requires.
635 std::unique_ptr<MemoryBuffer> BitcodeBuffer(
636 MemoryBuffer::getMemBuffer(Bitcode, "Bitcode for test"));
637 ErrorOr<Module*> ModuleOrErr = getLazyBitcodeModule(BitcodeBuffer, Context);
638 if (std::error_code EC = ModuleOrErr.getError()) {
639 ADD_FAILURE() << EC.message();
642 std::unique_ptr<Module> Owner(ModuleOrErr.get());
645 ExecutionEngine *TheJIT = EngineBuilder(std::move(Owner))
646 .setEngineKind(EngineKind::JIT)
647 .setErrorStr(&errMsg)
649 if (TheJIT == nullptr) {
650 ADD_FAILURE() << errMsg;
658 TEST(LazyLoadedJITTest, MaterializableAvailableExternallyFunctionIsntCompiled) {
660 const std::string Bitcode =
661 AssembleToBitcode(Context,
662 "define available_externally i32 "
663 " @JITTest_AvailableExternallyFunction() { "
667 "define i32 @func() { "
668 " %result = tail call i32 "
669 " @JITTest_AvailableExternallyFunction() "
672 ASSERT_FALSE(Bitcode.empty()) << "Assembling failed";
674 std::unique_ptr<ExecutionEngine> TheJIT(
675 getJITFromBitcode(Context, Bitcode, M));
676 ASSERT_TRUE(TheJIT.get()) << "Failed to create JIT.";
677 TheJIT->DisableLazyCompilation(true);
679 Function *funcIR = M->getFunction("func");
680 Function *availableFunctionIR =
681 M->getFunction("JITTest_AvailableExternallyFunction");
683 // Double-check that the available_externally function is still unmaterialized
684 // when getPointerToFunction needs to find out if it's available_externally.
685 EXPECT_TRUE(availableFunctionIR->isMaterializable());
687 int32_t (*func)() = reinterpret_cast<int32_t(*)()>(
688 (intptr_t)TheJIT->getPointerToFunction(funcIR));
689 EXPECT_EQ(42, func()) << "func should return 42 from the static version,"
690 << " not 7 from the IR version.";
693 TEST(LazyLoadedJITTest, EagerCompiledRecursionThroughGhost) {
695 const std::string Bitcode =
696 AssembleToBitcode(Context,
697 "define i32 @recur1(i32 %a) { "
698 " %zero = icmp eq i32 %a, 0 "
699 " br i1 %zero, label %done, label %notdone "
703 " %am1 = sub i32 %a, 1 "
704 " %result = call i32 @recur2(i32 %am1) "
708 "define i32 @recur2(i32 %b) { "
709 " %result = call i32 @recur1(i32 %b) "
712 ASSERT_FALSE(Bitcode.empty()) << "Assembling failed";
714 std::unique_ptr<ExecutionEngine> TheJIT(
715 getJITFromBitcode(Context, Bitcode, M));
716 ASSERT_TRUE(TheJIT.get()) << "Failed to create JIT.";
717 TheJIT->DisableLazyCompilation(true);
719 Function *recur1IR = M->getFunction("recur1");
720 Function *recur2IR = M->getFunction("recur2");
721 EXPECT_TRUE(recur1IR->isMaterializable());
722 EXPECT_TRUE(recur2IR->isMaterializable());
724 int32_t (*recur1)(int32_t) = reinterpret_cast<int32_t(*)(int32_t)>(
725 (intptr_t)TheJIT->getPointerToFunction(recur1IR));
726 EXPECT_EQ(3, recur1(4));
728 #endif // !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__)