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 bool LoadAssemblyInto(Module *M, const char *assembly) {
172 nullptr != ParseAssemblyString(assembly, M, Error, M->getContext());
174 raw_string_ostream os(errMsg);
176 EXPECT_TRUE(success) << os.str();
180 class JITTest : public testing::Test {
182 virtual RecordingJITMemoryManager *createMemoryManager() {
183 return new RecordingJITMemoryManager;
186 virtual void SetUp() {
187 std::unique_ptr<Module> Owner = make_unique<Module>("<main>", Context);
189 RJMM = createMemoryManager();
190 RJMM->setPoisonMemory(true);
192 TargetOptions Options;
193 TheJIT.reset(EngineBuilder(std::move(Owner))
194 .setEngineKind(EngineKind::JIT)
195 .setJITMemoryManager(RJMM)
197 .setTargetOptions(Options)
199 ASSERT_TRUE(TheJIT.get() != nullptr) << Error;
202 void LoadAssembly(const char *assembly) {
203 LoadAssemblyInto(M, assembly);
207 Module *M; // Owned by ExecutionEngine.
208 RecordingJITMemoryManager *RJMM;
209 std::unique_ptr<ExecutionEngine> TheJIT;
212 // Regression test for a bug. The JIT used to allocate globals inside the same
213 // memory block used for the function, and when the function code was freed,
214 // the global was left in the same place. This test allocates a function
215 // that uses and global, deallocates it, and then makes sure that the global
216 // stays alive after that.
217 TEST(JIT, GlobalInFunction) {
219 std::unique_ptr<Module> Owner = make_unique<Module>("<main>", context);
220 Module *M = Owner.get();
222 JITMemoryManager *MemMgr = JITMemoryManager::CreateDefaultMemManager();
223 // Tell the memory manager to poison freed memory so that accessing freed
224 // memory is more easily tested.
225 MemMgr->setPoisonMemory(true);
227 std::unique_ptr<ExecutionEngine> JIT(EngineBuilder(std::move(Owner))
228 .setEngineKind(EngineKind::JIT)
230 .setJITMemoryManager(MemMgr)
231 // The next line enables the fix:
232 .setAllocateGVsWithCode(false)
234 ASSERT_EQ(Error, "");
236 // Create a global variable.
237 Type *GTy = Type::getInt32Ty(context);
238 GlobalVariable *G = new GlobalVariable(
241 false, // Not constant.
242 GlobalValue::InternalLinkage,
243 Constant::getNullValue(GTy),
246 // Make a function that points to a global.
247 Function *F1 = makeReturnGlobal("F1", G, M);
249 // Get the pointer to the native code to force it to JIT the function and
250 // allocate space for the global.
252 reinterpret_cast<void(*)()>((intptr_t)JIT->getPointerToFunction(F1));
254 // Since F1 was codegen'd, a pointer to G should be available.
255 int32_t *GPtr = (int32_t*)JIT->getPointerToGlobalIfAvailable(G);
256 ASSERT_NE((int32_t*)nullptr, GPtr);
259 // F1() should increment G.
263 // Make a second function identical to the first, referring to the same
265 Function *F2 = makeReturnGlobal("F2", G, M);
267 reinterpret_cast<void(*)()>((intptr_t)JIT->getPointerToFunction(F2));
269 // F2() should increment G.
274 JIT->freeMachineCodeForFunction(F1);
276 // F2() should *still* increment G.
281 int PlusOne(int arg) {
285 TEST_F(JITTest, FarCallToKnownFunction) {
286 // x86-64 can only make direct calls to functions within 32 bits of
287 // the current PC. To call anything farther away, we have to load
288 // the address into a register and call through the register. The
289 // current JIT does this by allocating a stub for any far call.
290 // There was a bug in which the JIT tried to emit a direct call when
291 // the target was already in the JIT's global mappings and lazy
292 // compilation was disabled.
294 Function *KnownFunction = Function::Create(
295 TypeBuilder<int(int), false>::get(Context),
296 GlobalValue::ExternalLinkage, "known", M);
297 TheJIT->addGlobalMapping(KnownFunction, (void*)(intptr_t)PlusOne);
299 // int test() { return known(7); }
300 Function *TestFunction = Function::Create(
301 TypeBuilder<int(), false>::get(Context),
302 GlobalValue::ExternalLinkage, "test", M);
303 BasicBlock *Entry = BasicBlock::Create(Context, "entry", TestFunction);
304 IRBuilder<> Builder(Entry);
305 Value *result = Builder.CreateCall(
307 ConstantInt::get(TypeBuilder<int, false>::get(Context), 7));
308 Builder.CreateRet(result);
310 TheJIT->DisableLazyCompilation(true);
311 int (*TestFunctionPtr)() = reinterpret_cast<int(*)()>(
312 (intptr_t)TheJIT->getPointerToFunction(TestFunction));
313 // This used to crash in trying to call PlusOne().
314 EXPECT_EQ(8, TestFunctionPtr());
317 // Test a function C which calls A and B which call each other.
318 TEST_F(JITTest, NonLazyCompilationStillNeedsStubs) {
319 TheJIT->DisableLazyCompilation(true);
321 FunctionType *Func1Ty =
322 cast<FunctionType>(TypeBuilder<void(void), false>::get(Context));
323 std::vector<Type*> arg_types;
324 arg_types.push_back(Type::getInt1Ty(Context));
325 FunctionType *FuncTy = FunctionType::get(
326 Type::getVoidTy(Context), arg_types, false);
327 Function *Func1 = Function::Create(Func1Ty, Function::ExternalLinkage,
329 Function *Func2 = Function::Create(FuncTy, Function::InternalLinkage,
331 Function *Func3 = Function::Create(FuncTy, Function::InternalLinkage,
333 BasicBlock *Block1 = BasicBlock::Create(Context, "block1", Func1);
334 BasicBlock *Block2 = BasicBlock::Create(Context, "block2", Func2);
335 BasicBlock *True2 = BasicBlock::Create(Context, "cond_true", Func2);
336 BasicBlock *False2 = BasicBlock::Create(Context, "cond_false", Func2);
337 BasicBlock *Block3 = BasicBlock::Create(Context, "block3", Func3);
338 BasicBlock *True3 = BasicBlock::Create(Context, "cond_true", Func3);
339 BasicBlock *False3 = BasicBlock::Create(Context, "cond_false", Func3);
341 // Make Func1 call Func2(0) and Func3(0).
342 IRBuilder<> Builder(Block1);
343 Builder.CreateCall(Func2, ConstantInt::getTrue(Context));
344 Builder.CreateCall(Func3, ConstantInt::getTrue(Context));
345 Builder.CreateRetVoid();
347 // void Func2(bool b) { if (b) { Func3(false); return; } return; }
348 Builder.SetInsertPoint(Block2);
349 Builder.CreateCondBr(Func2->arg_begin(), True2, False2);
350 Builder.SetInsertPoint(True2);
351 Builder.CreateCall(Func3, ConstantInt::getFalse(Context));
352 Builder.CreateRetVoid();
353 Builder.SetInsertPoint(False2);
354 Builder.CreateRetVoid();
356 // void Func3(bool b) { if (b) { Func2(false); return; } return; }
357 Builder.SetInsertPoint(Block3);
358 Builder.CreateCondBr(Func3->arg_begin(), True3, False3);
359 Builder.SetInsertPoint(True3);
360 Builder.CreateCall(Func2, ConstantInt::getFalse(Context));
361 Builder.CreateRetVoid();
362 Builder.SetInsertPoint(False3);
363 Builder.CreateRetVoid();
365 // Compile the function to native code
367 reinterpret_cast<void(*)()>((intptr_t)TheJIT->getPointerToFunction(Func1));
372 // Regression test for PR5162. This used to trigger an AssertingVH inside the
373 // JIT's Function to stub mapping.
374 TEST_F(JITTest, NonLazyLeaksNoStubs) {
375 TheJIT->DisableLazyCompilation(true);
377 // Create two functions with a single basic block each.
378 FunctionType *FuncTy =
379 cast<FunctionType>(TypeBuilder<int(), false>::get(Context));
380 Function *Func1 = Function::Create(FuncTy, Function::ExternalLinkage,
382 Function *Func2 = Function::Create(FuncTy, Function::InternalLinkage,
384 BasicBlock *Block1 = BasicBlock::Create(Context, "block1", Func1);
385 BasicBlock *Block2 = BasicBlock::Create(Context, "block2", Func2);
387 // The first function calls the second and returns the result
388 IRBuilder<> Builder(Block1);
389 Value *Result = Builder.CreateCall(Func2);
390 Builder.CreateRet(Result);
392 // The second function just returns a constant
393 Builder.SetInsertPoint(Block2);
394 Builder.CreateRet(ConstantInt::get(TypeBuilder<int, false>::get(Context),42));
396 // Compile the function to native code
397 (void)TheJIT->getPointerToFunction(Func1);
399 // Free the JIT state for the functions
400 TheJIT->freeMachineCodeForFunction(Func1);
401 TheJIT->freeMachineCodeForFunction(Func2);
403 // Delete the first function (and show that is has no users)
404 EXPECT_EQ(Func1->getNumUses(), 0u);
405 Func1->eraseFromParent();
407 // Delete the second function (and show that it has no users - it had one,
408 // func1 but that's gone now)
409 EXPECT_EQ(Func2->getNumUses(), 0u);
410 Func2->eraseFromParent();
413 TEST_F(JITTest, ModuleDeletion) {
414 TheJIT->DisableLazyCompilation(false);
415 LoadAssembly("define void @main() { "
416 " call i32 @computeVal() "
420 "define internal i32 @computeVal() { "
423 Function *func = M->getFunction("main");
424 TheJIT->getPointerToFunction(func);
425 TheJIT->removeModule(M);
428 SmallPtrSet<const void*, 2> FunctionsDeallocated;
429 for (unsigned i = 0, e = RJMM->deallocateFunctionBodyCalls.size();
431 FunctionsDeallocated.insert(RJMM->deallocateFunctionBodyCalls[i].Body);
433 for (unsigned i = 0, e = RJMM->startFunctionBodyCalls.size(); i != e; ++i) {
434 EXPECT_TRUE(FunctionsDeallocated.count(
435 RJMM->startFunctionBodyCalls[i].Result))
436 << "Function leaked: \n" << RJMM->startFunctionBodyCalls[i].F_dump;
438 EXPECT_EQ(RJMM->startFunctionBodyCalls.size(),
439 RJMM->deallocateFunctionBodyCalls.size());
442 // ARM, MIPS and PPC still emit stubs for calls since the target may be
443 // too far away to call directly. This #if can probably be removed when
444 // http://llvm.org/PR5201 is fixed.
445 #if !defined(__arm__) && !defined(__mips__) && \
446 !defined(__powerpc__) && !defined(__ppc__) && !defined(__aarch64__)
447 typedef int (*FooPtr) ();
449 TEST_F(JITTest, NoStubs) {
450 LoadAssembly("define void @bar() {"
455 "define i32 @foo() {"
461 "define i32 @main() {"
463 "%0 = call i32 @foo()"
467 Function *foo = M->getFunction("foo");
468 uintptr_t tmp = (uintptr_t)(TheJIT->getPointerToFunction(foo));
469 FooPtr ptr = (FooPtr)(tmp);
473 // We should now allocate no more stubs, we have the code to foo
474 // and the existing stub for bar.
475 int stubsBefore = RJMM->stubsAllocated;
476 Function *func = M->getFunction("main");
477 TheJIT->getPointerToFunction(func);
479 Function *bar = M->getFunction("bar");
480 TheJIT->getPointerToFunction(bar);
482 ASSERT_EQ(stubsBefore, RJMM->stubsAllocated);
484 #endif // !ARM && !PPC
486 TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
487 TheJIT->DisableLazyCompilation(true);
488 LoadAssembly("define i8()* @get_foo_addr() { "
492 "define i8 @foo() { "
495 Function *F_get_foo_addr = M->getFunction("get_foo_addr");
497 typedef char(*fooT)();
498 fooT (*get_foo_addr)() = reinterpret_cast<fooT(*)()>(
499 (intptr_t)TheJIT->getPointerToFunction(F_get_foo_addr));
500 fooT foo_addr = get_foo_addr();
502 // Now free get_foo_addr. This should not free the machine code for foo or
503 // any call stub returned as foo's canonical address.
504 TheJIT->freeMachineCodeForFunction(F_get_foo_addr);
506 // Check by calling the reported address of foo.
507 EXPECT_EQ(42, foo_addr());
509 // The reported address should also be the same as the result of a subsequent
510 // getPointerToFunction(foo).
512 // Fails until PR5126 is fixed:
513 Function *F_foo = M->getFunction("foo");
514 fooT foo = reinterpret_cast<fooT>(
515 (intptr_t)TheJIT->getPointerToFunction(F_foo));
516 EXPECT_EQ((intptr_t)foo, (intptr_t)foo_addr);
520 // ARM does not have an implementation of replaceMachineCodeForFunction(),
521 // so recompileAndRelinkFunction doesn't work.
522 #if !defined(__arm__) && !defined(__aarch64__)
523 TEST_F(JITTest, FunctionIsRecompiledAndRelinked) {
524 Function *F = Function::Create(TypeBuilder<int(void), false>::get(Context),
525 GlobalValue::ExternalLinkage, "test", M);
526 BasicBlock *Entry = BasicBlock::Create(Context, "entry", F);
527 IRBuilder<> Builder(Entry);
528 Value *Val = ConstantInt::get(TypeBuilder<int, false>::get(Context), 1);
529 Builder.CreateRet(Val);
531 TheJIT->DisableLazyCompilation(true);
532 // Compile the function once, and make sure it works.
533 int (*OrigFPtr)() = reinterpret_cast<int(*)()>(
534 (intptr_t)TheJIT->recompileAndRelinkFunction(F));
535 EXPECT_EQ(1, OrigFPtr());
537 // Now change the function to return a different value.
538 Entry->eraseFromParent();
539 BasicBlock *NewEntry = BasicBlock::Create(Context, "new_entry", F);
540 Builder.SetInsertPoint(NewEntry);
541 Val = ConstantInt::get(TypeBuilder<int, false>::get(Context), 2);
542 Builder.CreateRet(Val);
543 // Recompile it, which should produce a new function pointer _and_ update the
545 int (*NewFPtr)() = reinterpret_cast<int(*)()>(
546 (intptr_t)TheJIT->recompileAndRelinkFunction(F));
548 EXPECT_EQ(2, NewFPtr())
549 << "The new pointer should call the new version of the function";
550 EXPECT_EQ(2, OrigFPtr())
551 << "The old pointer's target should now jump to the new version";
553 #endif // !defined(__arm__)
555 TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
556 TheJIT->DisableLazyCompilation(true);
557 LoadAssembly("@JITTest_AvailableExternallyGlobal = "
558 " available_externally global i32 7 "
560 "define i32 @loader() { "
561 " %result = load i32* @JITTest_AvailableExternallyGlobal "
564 Function *loaderIR = M->getFunction("loader");
566 int32_t (*loader)() = reinterpret_cast<int32_t(*)()>(
567 (intptr_t)TheJIT->getPointerToFunction(loaderIR));
568 EXPECT_EQ(42, loader()) << "func should return 42 from the external global,"
569 << " not 7 from the IR version.";
572 TEST_F(JITTest, AvailableExternallyFunctionIsntCompiled) {
573 TheJIT->DisableLazyCompilation(true);
574 LoadAssembly("define available_externally i32 "
575 " @JITTest_AvailableExternallyFunction() { "
579 "define i32 @func() { "
580 " %result = tail call i32 "
581 " @JITTest_AvailableExternallyFunction() "
584 Function *funcIR = M->getFunction("func");
586 int32_t (*func)() = reinterpret_cast<int32_t(*)()>(
587 (intptr_t)TheJIT->getPointerToFunction(funcIR));
588 EXPECT_EQ(42, func()) << "func should return 42 from the static version,"
589 << " not 7 from the IR version.";
592 TEST_F(JITTest, EscapedLazyStubStillCallable) {
593 TheJIT->DisableLazyCompilation(false);
594 LoadAssembly("define internal i32 @stubbed() { "
598 "define i32()* @get_stub() { "
599 " ret i32()* @stubbed "
601 typedef int32_t(*StubTy)();
603 // Call get_stub() to get the address of @stubbed without actually JITting it.
604 Function *get_stubIR = M->getFunction("get_stub");
605 StubTy (*get_stub)() = reinterpret_cast<StubTy(*)()>(
606 (intptr_t)TheJIT->getPointerToFunction(get_stubIR));
607 StubTy stubbed = get_stub();
608 // Now get_stubIR is the only reference to stubbed's stub.
609 get_stubIR->eraseFromParent();
610 // Now there are no references inside the JIT, but we've got a pointer outside
611 // it. The stub should be callable and return the right value.
612 EXPECT_EQ(42, stubbed());
615 // Converts the LLVM assembly to bitcode and returns it in a std::string. An
616 // empty string indicates an error.
617 std::string AssembleToBitcode(LLVMContext &Context, const char *Assembly) {
618 Module TempModule("TempModule", Context);
619 if (!LoadAssemblyInto(&TempModule, Assembly)) {
624 raw_string_ostream OS(Result);
625 WriteBitcodeToFile(&TempModule, OS);
630 // Returns a newly-created ExecutionEngine that reads the bitcode in 'Bitcode'
631 // lazily. The associated Module (owned by the ExecutionEngine) is returned in
632 // M. Both will be NULL on an error. Bitcode must live at least as long as the
634 ExecutionEngine *getJITFromBitcode(
635 LLVMContext &Context, const std::string &Bitcode, Module *&M) {
636 // c_str() is null-terminated like MemoryBuffer::getMemBuffer requires.
637 MemoryBuffer *BitcodeBuffer =
638 MemoryBuffer::getMemBuffer(Bitcode, "Bitcode for test");
639 ErrorOr<Module*> ModuleOrErr = getLazyBitcodeModule(BitcodeBuffer, Context);
640 if (std::error_code EC = ModuleOrErr.getError()) {
641 ADD_FAILURE() << EC.message();
642 delete BitcodeBuffer;
645 std::unique_ptr<Module> Owner(ModuleOrErr.get());
648 ExecutionEngine *TheJIT = EngineBuilder(std::move(Owner))
649 .setEngineKind(EngineKind::JIT)
650 .setErrorStr(&errMsg)
652 if (TheJIT == nullptr) {
653 ADD_FAILURE() << errMsg;
661 TEST(LazyLoadedJITTest, MaterializableAvailableExternallyFunctionIsntCompiled) {
663 const std::string Bitcode =
664 AssembleToBitcode(Context,
665 "define available_externally i32 "
666 " @JITTest_AvailableExternallyFunction() { "
670 "define i32 @func() { "
671 " %result = tail call i32 "
672 " @JITTest_AvailableExternallyFunction() "
675 ASSERT_FALSE(Bitcode.empty()) << "Assembling failed";
677 std::unique_ptr<ExecutionEngine> TheJIT(
678 getJITFromBitcode(Context, Bitcode, M));
679 ASSERT_TRUE(TheJIT.get()) << "Failed to create JIT.";
680 TheJIT->DisableLazyCompilation(true);
682 Function *funcIR = M->getFunction("func");
683 Function *availableFunctionIR =
684 M->getFunction("JITTest_AvailableExternallyFunction");
686 // Double-check that the available_externally function is still unmaterialized
687 // when getPointerToFunction needs to find out if it's available_externally.
688 EXPECT_TRUE(availableFunctionIR->isMaterializable());
690 int32_t (*func)() = reinterpret_cast<int32_t(*)()>(
691 (intptr_t)TheJIT->getPointerToFunction(funcIR));
692 EXPECT_EQ(42, func()) << "func should return 42 from the static version,"
693 << " not 7 from the IR version.";
696 TEST(LazyLoadedJITTest, EagerCompiledRecursionThroughGhost) {
698 const std::string Bitcode =
699 AssembleToBitcode(Context,
700 "define i32 @recur1(i32 %a) { "
701 " %zero = icmp eq i32 %a, 0 "
702 " br i1 %zero, label %done, label %notdone "
706 " %am1 = sub i32 %a, 1 "
707 " %result = call i32 @recur2(i32 %am1) "
711 "define i32 @recur2(i32 %b) { "
712 " %result = call i32 @recur1(i32 %b) "
715 ASSERT_FALSE(Bitcode.empty()) << "Assembling failed";
717 std::unique_ptr<ExecutionEngine> TheJIT(
718 getJITFromBitcode(Context, Bitcode, M));
719 ASSERT_TRUE(TheJIT.get()) << "Failed to create JIT.";
720 TheJIT->DisableLazyCompilation(true);
722 Function *recur1IR = M->getFunction("recur1");
723 Function *recur2IR = M->getFunction("recur2");
724 EXPECT_TRUE(recur1IR->isMaterializable());
725 EXPECT_TRUE(recur2IR->isMaterializable());
727 int32_t (*recur1)(int32_t) = reinterpret_cast<int32_t(*)(int32_t)>(
728 (intptr_t)TheJIT->getPointerToFunction(recur1IR));
729 EXPECT_EQ(3, recur1(4));
731 #endif // !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__)