1 //===-- ExecutionEngine.cpp - Common Implementation shared by EEs ---------===//
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 // This file defines the common interface used by the various execution engine
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ExecutionEngine/ExecutionEngine.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/ADT/Statistic.h"
18 #include "llvm/ExecutionEngine/GenericValue.h"
19 #include "llvm/ExecutionEngine/JITMemoryManager.h"
20 #include "llvm/ExecutionEngine/ObjectCache.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/DataLayout.h"
23 #include "llvm/IR/DerivedTypes.h"
24 #include "llvm/IR/Module.h"
25 #include "llvm/IR/Operator.h"
26 #include "llvm/IR/ValueHandle.h"
27 #include "llvm/Object/Archive.h"
28 #include "llvm/Object/ObjectFile.h"
29 #include "llvm/Support/Debug.h"
30 #include "llvm/Support/DynamicLibrary.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/Host.h"
33 #include "llvm/Support/MutexGuard.h"
34 #include "llvm/Support/TargetRegistry.h"
35 #include "llvm/Support/raw_ostream.h"
36 #include "llvm/Target/TargetMachine.h"
41 #define DEBUG_TYPE "jit"
43 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
44 STATISTIC(NumGlobals , "Number of global vars initialized");
46 // Pin the vtable to this file.
47 void ObjectCache::anchor() {}
48 void ObjectBuffer::anchor() {}
49 void ObjectBufferStream::anchor() {}
51 ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
52 std::unique_ptr<Module> M, std::string *ErrorStr,
53 RTDyldMemoryManager *MCJMM, std::unique_ptr<TargetMachine> TM) = nullptr;
54 ExecutionEngine *(*ExecutionEngine::InterpCtor)(std::unique_ptr<Module> M,
55 std::string *ErrorStr) =nullptr;
57 ExecutionEngine::ExecutionEngine(std::unique_ptr<Module> M)
59 LazyFunctionCreator(nullptr) {
60 CompilingLazily = false;
61 GVCompilationDisabled = false;
62 SymbolSearchingDisabled = false;
64 // IR module verification is enabled by default in debug builds, and disabled
65 // by default in release builds.
69 VerifyModules = false;
72 assert(M && "Module is null?");
73 Modules.push_back(std::move(M));
76 ExecutionEngine::~ExecutionEngine() {
77 clearAllGlobalMappings();
81 /// \brief Helper class which uses a value handler to automatically deletes the
82 /// memory block when the GlobalVariable is destroyed.
83 class GVMemoryBlock : public CallbackVH {
84 GVMemoryBlock(const GlobalVariable *GV)
85 : CallbackVH(const_cast<GlobalVariable*>(GV)) {}
88 /// \brief Returns the address the GlobalVariable should be written into. The
89 /// GVMemoryBlock object prefixes that.
90 static char *Create(const GlobalVariable *GV, const DataLayout& TD) {
91 Type *ElTy = GV->getType()->getElementType();
92 size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
93 void *RawMemory = ::operator new(
94 DataLayout::RoundUpAlignment(sizeof(GVMemoryBlock),
95 TD.getPreferredAlignment(GV))
97 new(RawMemory) GVMemoryBlock(GV);
98 return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
101 void deleted() override {
102 // We allocated with operator new and with some extra memory hanging off the
103 // end, so don't just delete this. I'm not sure if this is actually
105 this->~GVMemoryBlock();
106 ::operator delete(this);
109 } // anonymous namespace
111 char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
112 return GVMemoryBlock::Create(GV, *getDataLayout());
115 void ExecutionEngine::addObjectFile(std::unique_ptr<object::ObjectFile> O) {
116 llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
120 ExecutionEngine::addObjectFile(object::OwningBinary<object::ObjectFile> O) {
121 llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
124 void ExecutionEngine::addArchive(object::OwningBinary<object::Archive> A) {
125 llvm_unreachable("ExecutionEngine subclass doesn't implement addArchive.");
128 bool ExecutionEngine::removeModule(Module *M) {
129 for (auto I = Modules.begin(), E = Modules.end(); I != E; ++I) {
130 Module *Found = I->get();
134 clearGlobalMappingsFromModule(M);
141 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
142 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
143 if (Function *F = Modules[i]->getFunction(FnName))
150 void *ExecutionEngineState::RemoveMapping(const GlobalValue *ToUnmap) {
151 GlobalAddressMapTy::iterator I = GlobalAddressMap.find(ToUnmap);
154 // FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
156 if (I == GlobalAddressMap.end())
160 GlobalAddressMap.erase(I);
163 GlobalAddressReverseMap.erase(OldVal);
167 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
168 MutexGuard locked(lock);
170 DEBUG(dbgs() << "JIT: Map \'" << GV->getName()
171 << "\' to [" << Addr << "]\n";);
172 void *&CurVal = EEState.getGlobalAddressMap()[GV];
173 assert((!CurVal || !Addr) && "GlobalMapping already established!");
176 // If we are using the reverse mapping, add it too.
177 if (!EEState.getGlobalAddressReverseMap().empty()) {
178 AssertingVH<const GlobalValue> &V =
179 EEState.getGlobalAddressReverseMap()[Addr];
180 assert((!V || !GV) && "GlobalMapping already established!");
185 void ExecutionEngine::clearAllGlobalMappings() {
186 MutexGuard locked(lock);
188 EEState.getGlobalAddressMap().clear();
189 EEState.getGlobalAddressReverseMap().clear();
192 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
193 MutexGuard locked(lock);
195 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
196 EEState.RemoveMapping(FI);
197 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
199 EEState.RemoveMapping(GI);
202 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
203 MutexGuard locked(lock);
205 ExecutionEngineState::GlobalAddressMapTy &Map =
206 EEState.getGlobalAddressMap();
208 // Deleting from the mapping?
210 return EEState.RemoveMapping(GV);
212 void *&CurVal = Map[GV];
213 void *OldVal = CurVal;
215 if (CurVal && !EEState.getGlobalAddressReverseMap().empty())
216 EEState.getGlobalAddressReverseMap().erase(CurVal);
219 // If we are using the reverse mapping, add it too.
220 if (!EEState.getGlobalAddressReverseMap().empty()) {
221 AssertingVH<const GlobalValue> &V =
222 EEState.getGlobalAddressReverseMap()[Addr];
223 assert((!V || !GV) && "GlobalMapping already established!");
229 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
230 MutexGuard locked(lock);
232 ExecutionEngineState::GlobalAddressMapTy::iterator I =
233 EEState.getGlobalAddressMap().find(GV);
234 return I != EEState.getGlobalAddressMap().end() ? I->second : nullptr;
237 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
238 MutexGuard locked(lock);
240 // If we haven't computed the reverse mapping yet, do so first.
241 if (EEState.getGlobalAddressReverseMap().empty()) {
242 for (ExecutionEngineState::GlobalAddressMapTy::iterator
243 I = EEState.getGlobalAddressMap().begin(),
244 E = EEState.getGlobalAddressMap().end(); I != E; ++I)
245 EEState.getGlobalAddressReverseMap().insert(std::make_pair(
246 I->second, I->first));
249 std::map<void *, AssertingVH<const GlobalValue> >::iterator I =
250 EEState.getGlobalAddressReverseMap().find(Addr);
251 return I != EEState.getGlobalAddressReverseMap().end() ? I->second : nullptr;
256 std::unique_ptr<char[]> Array;
257 std::vector<std::unique_ptr<char[]>> Values;
259 /// Turn a vector of strings into a nice argv style array of pointers to null
260 /// terminated strings.
261 void *reset(LLVMContext &C, ExecutionEngine *EE,
262 const std::vector<std::string> &InputArgv);
264 } // anonymous namespace
265 void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
266 const std::vector<std::string> &InputArgv) {
267 Values.clear(); // Free the old contents.
268 Values.reserve(InputArgv.size());
269 unsigned PtrSize = EE->getDataLayout()->getPointerSize();
270 Array = make_unique<char[]>((InputArgv.size()+1)*PtrSize);
272 DEBUG(dbgs() << "JIT: ARGV = " << (void*)Array.get() << "\n");
273 Type *SBytePtr = Type::getInt8PtrTy(C);
275 for (unsigned i = 0; i != InputArgv.size(); ++i) {
276 unsigned Size = InputArgv[i].size()+1;
277 auto Dest = make_unique<char[]>(Size);
278 DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void*)Dest.get() << "\n");
280 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest.get());
283 // Endian safe: Array[i] = (PointerTy)Dest;
284 EE->StoreValueToMemory(PTOGV(Dest.get()),
285 (GenericValue*)(&Array[i*PtrSize]), SBytePtr);
286 Values.push_back(std::move(Dest));
290 EE->StoreValueToMemory(PTOGV(nullptr),
291 (GenericValue*)(&Array[InputArgv.size()*PtrSize]),
296 void ExecutionEngine::runStaticConstructorsDestructors(Module &module,
298 const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
299 GlobalVariable *GV = module.getNamedGlobal(Name);
301 // If this global has internal linkage, or if it has a use, then it must be
302 // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
303 // this is the case, don't execute any of the global ctors, __main will do
305 if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
307 // Should be an array of '{ i32, void ()* }' structs. The first value is
308 // the init priority, which we ignore.
309 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
312 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
313 ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i));
316 Constant *FP = CS->getOperand(1);
317 if (FP->isNullValue())
318 continue; // Found a sentinal value, ignore.
320 // Strip off constant expression casts.
321 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
323 FP = CE->getOperand(0);
325 // Execute the ctor/dtor function!
326 if (Function *F = dyn_cast<Function>(FP))
327 runFunction(F, std::vector<GenericValue>());
329 // FIXME: It is marginally lame that we just do nothing here if we see an
330 // entry we don't recognize. It might not be unreasonable for the verifier
331 // to not even allow this and just assert here.
335 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
336 // Execute global ctors/dtors for each module in the program.
337 for (std::unique_ptr<Module> &M : Modules)
338 runStaticConstructorsDestructors(*M, isDtors);
342 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
343 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
344 unsigned PtrSize = EE->getDataLayout()->getPointerSize();
345 for (unsigned i = 0; i < PtrSize; ++i)
346 if (*(i + (uint8_t*)Loc))
352 int ExecutionEngine::runFunctionAsMain(Function *Fn,
353 const std::vector<std::string> &argv,
354 const char * const * envp) {
355 std::vector<GenericValue> GVArgs;
357 GVArgc.IntVal = APInt(32, argv.size());
360 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
361 FunctionType *FTy = Fn->getFunctionType();
362 Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
364 // Check the argument types.
366 report_fatal_error("Invalid number of arguments of main() supplied");
367 if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
368 report_fatal_error("Invalid type for third argument of main() supplied");
369 if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
370 report_fatal_error("Invalid type for second argument of main() supplied");
371 if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
372 report_fatal_error("Invalid type for first argument of main() supplied");
373 if (!FTy->getReturnType()->isIntegerTy() &&
374 !FTy->getReturnType()->isVoidTy())
375 report_fatal_error("Invalid return type of main() supplied");
380 GVArgs.push_back(GVArgc); // Arg #0 = argc.
383 GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
384 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
385 "argv[0] was null after CreateArgv");
387 std::vector<std::string> EnvVars;
388 for (unsigned i = 0; envp[i]; ++i)
389 EnvVars.push_back(envp[i]);
391 GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
396 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
399 void EngineBuilder::InitEngine() {
400 WhichEngine = EngineKind::Either;
402 OptLevel = CodeGenOpt::Default;
405 Options = TargetOptions();
406 RelocModel = Reloc::Default;
407 CMModel = CodeModel::JITDefault;
409 // IR module verification is enabled by default in debug builds, and disabled
410 // by default in release builds.
412 VerifyModules = true;
414 VerifyModules = false;
418 ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
419 std::unique_ptr<TargetMachine> TheTM(TM); // Take ownership.
421 // Make sure we can resolve symbols in the program as well. The zero arg
422 // to the function tells DynamicLibrary to load the program, not a library.
423 if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr, ErrorStr))
426 assert(!(JMM && MCJMM));
428 // If the user specified a memory manager but didn't specify which engine to
429 // create, we assume they only want the JIT, and we fail if they only want
432 if (WhichEngine & EngineKind::JIT)
433 WhichEngine = EngineKind::JIT;
436 *ErrorStr = "Cannot create an interpreter with a memory manager.";
441 // Unless the interpreter was explicitly selected or the JIT is not linked,
443 if ((WhichEngine & EngineKind::JIT) && TheTM) {
444 Triple TT(M->getTargetTriple());
445 if (!TM->getTarget().hasJIT()) {
446 errs() << "WARNING: This target JIT is not designed for the host"
447 << " you are running. If bad things happen, please choose"
448 << " a different -march switch.\n";
451 ExecutionEngine *EE = nullptr;
452 if (ExecutionEngine::MCJITCtor)
453 EE = ExecutionEngine::MCJITCtor(std::move(M), ErrorStr,
454 MCJMM ? MCJMM : JMM, std::move(TheTM));
456 EE->setVerifyModules(VerifyModules);
461 // If we can't make a JIT and we didn't request one specifically, try making
462 // an interpreter instead.
463 if (WhichEngine & EngineKind::Interpreter) {
464 if (ExecutionEngine::InterpCtor)
465 return ExecutionEngine::InterpCtor(std::move(M), ErrorStr);
467 *ErrorStr = "Interpreter has not been linked in.";
471 if ((WhichEngine & EngineKind::JIT) && !ExecutionEngine::MCJITCtor) {
473 *ErrorStr = "JIT has not been linked in.";
479 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
480 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
481 return getPointerToFunction(F);
483 MutexGuard locked(lock);
484 if (void *P = EEState.getGlobalAddressMap()[GV])
487 // Global variable might have been added since interpreter started.
488 if (GlobalVariable *GVar =
489 const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
490 EmitGlobalVariable(GVar);
492 llvm_unreachable("Global hasn't had an address allocated yet!");
494 return EEState.getGlobalAddressMap()[GV];
497 /// \brief Converts a Constant* into a GenericValue, including handling of
498 /// ConstantExpr values.
499 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
500 // If its undefined, return the garbage.
501 if (isa<UndefValue>(C)) {
503 switch (C->getType()->getTypeID()) {
506 case Type::IntegerTyID:
507 case Type::X86_FP80TyID:
508 case Type::FP128TyID:
509 case Type::PPC_FP128TyID:
510 // Although the value is undefined, we still have to construct an APInt
511 // with the correct bit width.
512 Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
514 case Type::StructTyID: {
515 // if the whole struct is 'undef' just reserve memory for the value.
516 if(StructType *STy = dyn_cast<StructType>(C->getType())) {
517 unsigned int elemNum = STy->getNumElements();
518 Result.AggregateVal.resize(elemNum);
519 for (unsigned int i = 0; i < elemNum; ++i) {
520 Type *ElemTy = STy->getElementType(i);
521 if (ElemTy->isIntegerTy())
522 Result.AggregateVal[i].IntVal =
523 APInt(ElemTy->getPrimitiveSizeInBits(), 0);
524 else if (ElemTy->isAggregateType()) {
525 const Constant *ElemUndef = UndefValue::get(ElemTy);
526 Result.AggregateVal[i] = getConstantValue(ElemUndef);
532 case Type::VectorTyID:
533 // if the whole vector is 'undef' just reserve memory for the value.
534 const VectorType* VTy = dyn_cast<VectorType>(C->getType());
535 const Type *ElemTy = VTy->getElementType();
536 unsigned int elemNum = VTy->getNumElements();
537 Result.AggregateVal.resize(elemNum);
538 if (ElemTy->isIntegerTy())
539 for (unsigned int i = 0; i < elemNum; ++i)
540 Result.AggregateVal[i].IntVal =
541 APInt(ElemTy->getPrimitiveSizeInBits(), 0);
547 // Otherwise, if the value is a ConstantExpr...
548 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
549 Constant *Op0 = CE->getOperand(0);
550 switch (CE->getOpcode()) {
551 case Instruction::GetElementPtr: {
553 GenericValue Result = getConstantValue(Op0);
554 APInt Offset(DL->getPointerSizeInBits(), 0);
555 cast<GEPOperator>(CE)->accumulateConstantOffset(*DL, Offset);
557 char* tmp = (char*) Result.PointerVal;
558 Result = PTOGV(tmp + Offset.getSExtValue());
561 case Instruction::Trunc: {
562 GenericValue GV = getConstantValue(Op0);
563 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
564 GV.IntVal = GV.IntVal.trunc(BitWidth);
567 case Instruction::ZExt: {
568 GenericValue GV = getConstantValue(Op0);
569 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
570 GV.IntVal = GV.IntVal.zext(BitWidth);
573 case Instruction::SExt: {
574 GenericValue GV = getConstantValue(Op0);
575 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
576 GV.IntVal = GV.IntVal.sext(BitWidth);
579 case Instruction::FPTrunc: {
581 GenericValue GV = getConstantValue(Op0);
582 GV.FloatVal = float(GV.DoubleVal);
585 case Instruction::FPExt:{
587 GenericValue GV = getConstantValue(Op0);
588 GV.DoubleVal = double(GV.FloatVal);
591 case Instruction::UIToFP: {
592 GenericValue GV = getConstantValue(Op0);
593 if (CE->getType()->isFloatTy())
594 GV.FloatVal = float(GV.IntVal.roundToDouble());
595 else if (CE->getType()->isDoubleTy())
596 GV.DoubleVal = GV.IntVal.roundToDouble();
597 else if (CE->getType()->isX86_FP80Ty()) {
598 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
599 (void)apf.convertFromAPInt(GV.IntVal,
601 APFloat::rmNearestTiesToEven);
602 GV.IntVal = apf.bitcastToAPInt();
606 case Instruction::SIToFP: {
607 GenericValue GV = getConstantValue(Op0);
608 if (CE->getType()->isFloatTy())
609 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
610 else if (CE->getType()->isDoubleTy())
611 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
612 else if (CE->getType()->isX86_FP80Ty()) {
613 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
614 (void)apf.convertFromAPInt(GV.IntVal,
616 APFloat::rmNearestTiesToEven);
617 GV.IntVal = apf.bitcastToAPInt();
621 case Instruction::FPToUI: // double->APInt conversion handles sign
622 case Instruction::FPToSI: {
623 GenericValue GV = getConstantValue(Op0);
624 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
625 if (Op0->getType()->isFloatTy())
626 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
627 else if (Op0->getType()->isDoubleTy())
628 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
629 else if (Op0->getType()->isX86_FP80Ty()) {
630 APFloat apf = APFloat(APFloat::x87DoubleExtended, GV.IntVal);
633 (void)apf.convertToInteger(&v, BitWidth,
634 CE->getOpcode()==Instruction::FPToSI,
635 APFloat::rmTowardZero, &ignored);
636 GV.IntVal = v; // endian?
640 case Instruction::PtrToInt: {
641 GenericValue GV = getConstantValue(Op0);
642 uint32_t PtrWidth = DL->getTypeSizeInBits(Op0->getType());
643 assert(PtrWidth <= 64 && "Bad pointer width");
644 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
645 uint32_t IntWidth = DL->getTypeSizeInBits(CE->getType());
646 GV.IntVal = GV.IntVal.zextOrTrunc(IntWidth);
649 case Instruction::IntToPtr: {
650 GenericValue GV = getConstantValue(Op0);
651 uint32_t PtrWidth = DL->getTypeSizeInBits(CE->getType());
652 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
653 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
654 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
657 case Instruction::BitCast: {
658 GenericValue GV = getConstantValue(Op0);
659 Type* DestTy = CE->getType();
660 switch (Op0->getType()->getTypeID()) {
661 default: llvm_unreachable("Invalid bitcast operand");
662 case Type::IntegerTyID:
663 assert(DestTy->isFloatingPointTy() && "invalid bitcast");
664 if (DestTy->isFloatTy())
665 GV.FloatVal = GV.IntVal.bitsToFloat();
666 else if (DestTy->isDoubleTy())
667 GV.DoubleVal = GV.IntVal.bitsToDouble();
669 case Type::FloatTyID:
670 assert(DestTy->isIntegerTy(32) && "Invalid bitcast");
671 GV.IntVal = APInt::floatToBits(GV.FloatVal);
673 case Type::DoubleTyID:
674 assert(DestTy->isIntegerTy(64) && "Invalid bitcast");
675 GV.IntVal = APInt::doubleToBits(GV.DoubleVal);
677 case Type::PointerTyID:
678 assert(DestTy->isPointerTy() && "Invalid bitcast");
679 break; // getConstantValue(Op0) above already converted it
683 case Instruction::Add:
684 case Instruction::FAdd:
685 case Instruction::Sub:
686 case Instruction::FSub:
687 case Instruction::Mul:
688 case Instruction::FMul:
689 case Instruction::UDiv:
690 case Instruction::SDiv:
691 case Instruction::URem:
692 case Instruction::SRem:
693 case Instruction::And:
694 case Instruction::Or:
695 case Instruction::Xor: {
696 GenericValue LHS = getConstantValue(Op0);
697 GenericValue RHS = getConstantValue(CE->getOperand(1));
699 switch (CE->getOperand(0)->getType()->getTypeID()) {
700 default: llvm_unreachable("Bad add type!");
701 case Type::IntegerTyID:
702 switch (CE->getOpcode()) {
703 default: llvm_unreachable("Invalid integer opcode");
704 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
705 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
706 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
707 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
708 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
709 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
710 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
711 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
712 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
713 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
716 case Type::FloatTyID:
717 switch (CE->getOpcode()) {
718 default: llvm_unreachable("Invalid float opcode");
719 case Instruction::FAdd:
720 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
721 case Instruction::FSub:
722 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
723 case Instruction::FMul:
724 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
725 case Instruction::FDiv:
726 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
727 case Instruction::FRem:
728 GV.FloatVal = std::fmod(LHS.FloatVal,RHS.FloatVal); break;
731 case Type::DoubleTyID:
732 switch (CE->getOpcode()) {
733 default: llvm_unreachable("Invalid double opcode");
734 case Instruction::FAdd:
735 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
736 case Instruction::FSub:
737 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
738 case Instruction::FMul:
739 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
740 case Instruction::FDiv:
741 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
742 case Instruction::FRem:
743 GV.DoubleVal = std::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
746 case Type::X86_FP80TyID:
747 case Type::PPC_FP128TyID:
748 case Type::FP128TyID: {
749 const fltSemantics &Sem = CE->getOperand(0)->getType()->getFltSemantics();
750 APFloat apfLHS = APFloat(Sem, LHS.IntVal);
751 switch (CE->getOpcode()) {
752 default: llvm_unreachable("Invalid long double opcode");
753 case Instruction::FAdd:
754 apfLHS.add(APFloat(Sem, RHS.IntVal), APFloat::rmNearestTiesToEven);
755 GV.IntVal = apfLHS.bitcastToAPInt();
757 case Instruction::FSub:
758 apfLHS.subtract(APFloat(Sem, RHS.IntVal),
759 APFloat::rmNearestTiesToEven);
760 GV.IntVal = apfLHS.bitcastToAPInt();
762 case Instruction::FMul:
763 apfLHS.multiply(APFloat(Sem, RHS.IntVal),
764 APFloat::rmNearestTiesToEven);
765 GV.IntVal = apfLHS.bitcastToAPInt();
767 case Instruction::FDiv:
768 apfLHS.divide(APFloat(Sem, RHS.IntVal),
769 APFloat::rmNearestTiesToEven);
770 GV.IntVal = apfLHS.bitcastToAPInt();
772 case Instruction::FRem:
773 apfLHS.mod(APFloat(Sem, RHS.IntVal),
774 APFloat::rmNearestTiesToEven);
775 GV.IntVal = apfLHS.bitcastToAPInt();
787 SmallString<256> Msg;
788 raw_svector_ostream OS(Msg);
789 OS << "ConstantExpr not handled: " << *CE;
790 report_fatal_error(OS.str());
793 // Otherwise, we have a simple constant.
795 switch (C->getType()->getTypeID()) {
796 case Type::FloatTyID:
797 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
799 case Type::DoubleTyID:
800 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
802 case Type::X86_FP80TyID:
803 case Type::FP128TyID:
804 case Type::PPC_FP128TyID:
805 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
807 case Type::IntegerTyID:
808 Result.IntVal = cast<ConstantInt>(C)->getValue();
810 case Type::PointerTyID:
811 if (isa<ConstantPointerNull>(C))
812 Result.PointerVal = nullptr;
813 else if (const Function *F = dyn_cast<Function>(C))
814 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
815 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
816 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
818 llvm_unreachable("Unknown constant pointer type!");
820 case Type::VectorTyID: {
823 const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(C);
824 const ConstantVector *CV = dyn_cast<ConstantVector>(C);
825 const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(C);
828 elemNum = CDV->getNumElements();
829 ElemTy = CDV->getElementType();
830 } else if (CV || CAZ) {
831 VectorType* VTy = dyn_cast<VectorType>(C->getType());
832 elemNum = VTy->getNumElements();
833 ElemTy = VTy->getElementType();
835 llvm_unreachable("Unknown constant vector type!");
838 Result.AggregateVal.resize(elemNum);
839 // Check if vector holds floats.
840 if(ElemTy->isFloatTy()) {
842 GenericValue floatZero;
843 floatZero.FloatVal = 0.f;
844 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
849 for (unsigned i = 0; i < elemNum; ++i)
850 if (!isa<UndefValue>(CV->getOperand(i)))
851 Result.AggregateVal[i].FloatVal = cast<ConstantFP>(
852 CV->getOperand(i))->getValueAPF().convertToFloat();
856 for (unsigned i = 0; i < elemNum; ++i)
857 Result.AggregateVal[i].FloatVal = CDV->getElementAsFloat(i);
861 // Check if vector holds doubles.
862 if (ElemTy->isDoubleTy()) {
864 GenericValue doubleZero;
865 doubleZero.DoubleVal = 0.0;
866 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
871 for (unsigned i = 0; i < elemNum; ++i)
872 if (!isa<UndefValue>(CV->getOperand(i)))
873 Result.AggregateVal[i].DoubleVal = cast<ConstantFP>(
874 CV->getOperand(i))->getValueAPF().convertToDouble();
878 for (unsigned i = 0; i < elemNum; ++i)
879 Result.AggregateVal[i].DoubleVal = CDV->getElementAsDouble(i);
883 // Check if vector holds integers.
884 if (ElemTy->isIntegerTy()) {
886 GenericValue intZero;
887 intZero.IntVal = APInt(ElemTy->getScalarSizeInBits(), 0ull);
888 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
893 for (unsigned i = 0; i < elemNum; ++i)
894 if (!isa<UndefValue>(CV->getOperand(i)))
895 Result.AggregateVal[i].IntVal = cast<ConstantInt>(
896 CV->getOperand(i))->getValue();
898 Result.AggregateVal[i].IntVal =
899 APInt(CV->getOperand(i)->getType()->getPrimitiveSizeInBits(), 0);
904 for (unsigned i = 0; i < elemNum; ++i)
905 Result.AggregateVal[i].IntVal = APInt(
906 CDV->getElementType()->getPrimitiveSizeInBits(),
907 CDV->getElementAsInteger(i));
911 llvm_unreachable("Unknown constant pointer type!");
916 SmallString<256> Msg;
917 raw_svector_ostream OS(Msg);
918 OS << "ERROR: Constant unimplemented for type: " << *C->getType();
919 report_fatal_error(OS.str());
925 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
926 /// with the integer held in IntVal.
927 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
928 unsigned StoreBytes) {
929 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
930 const uint8_t *Src = (const uint8_t *)IntVal.getRawData();
932 if (sys::IsLittleEndianHost) {
933 // Little-endian host - the source is ordered from LSB to MSB. Order the
934 // destination from LSB to MSB: Do a straight copy.
935 memcpy(Dst, Src, StoreBytes);
937 // Big-endian host - the source is an array of 64 bit words ordered from
938 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
939 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
940 while (StoreBytes > sizeof(uint64_t)) {
941 StoreBytes -= sizeof(uint64_t);
942 // May not be aligned so use memcpy.
943 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
944 Src += sizeof(uint64_t);
947 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
951 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
952 GenericValue *Ptr, Type *Ty) {
953 const unsigned StoreBytes = getDataLayout()->getTypeStoreSize(Ty);
955 switch (Ty->getTypeID()) {
957 dbgs() << "Cannot store value of type " << *Ty << "!\n";
959 case Type::IntegerTyID:
960 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
962 case Type::FloatTyID:
963 *((float*)Ptr) = Val.FloatVal;
965 case Type::DoubleTyID:
966 *((double*)Ptr) = Val.DoubleVal;
968 case Type::X86_FP80TyID:
969 memcpy(Ptr, Val.IntVal.getRawData(), 10);
971 case Type::PointerTyID:
972 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
973 if (StoreBytes != sizeof(PointerTy))
974 memset(&(Ptr->PointerVal), 0, StoreBytes);
976 *((PointerTy*)Ptr) = Val.PointerVal;
978 case Type::VectorTyID:
979 for (unsigned i = 0; i < Val.AggregateVal.size(); ++i) {
980 if (cast<VectorType>(Ty)->getElementType()->isDoubleTy())
981 *(((double*)Ptr)+i) = Val.AggregateVal[i].DoubleVal;
982 if (cast<VectorType>(Ty)->getElementType()->isFloatTy())
983 *(((float*)Ptr)+i) = Val.AggregateVal[i].FloatVal;
984 if (cast<VectorType>(Ty)->getElementType()->isIntegerTy()) {
985 unsigned numOfBytes =(Val.AggregateVal[i].IntVal.getBitWidth()+7)/8;
986 StoreIntToMemory(Val.AggregateVal[i].IntVal,
987 (uint8_t*)Ptr + numOfBytes*i, numOfBytes);
993 if (sys::IsLittleEndianHost != getDataLayout()->isLittleEndian())
994 // Host and target are different endian - reverse the stored bytes.
995 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
998 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
999 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
1000 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
1001 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
1002 uint8_t *Dst = reinterpret_cast<uint8_t *>(
1003 const_cast<uint64_t *>(IntVal.getRawData()));
1005 if (sys::IsLittleEndianHost)
1006 // Little-endian host - the destination must be ordered from LSB to MSB.
1007 // The source is ordered from LSB to MSB: Do a straight copy.
1008 memcpy(Dst, Src, LoadBytes);
1010 // Big-endian - the destination is an array of 64 bit words ordered from
1011 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
1012 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
1014 while (LoadBytes > sizeof(uint64_t)) {
1015 LoadBytes -= sizeof(uint64_t);
1016 // May not be aligned so use memcpy.
1017 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
1018 Dst += sizeof(uint64_t);
1021 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
1027 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
1030 const unsigned LoadBytes = getDataLayout()->getTypeStoreSize(Ty);
1032 switch (Ty->getTypeID()) {
1033 case Type::IntegerTyID:
1034 // An APInt with all words initially zero.
1035 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
1036 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
1038 case Type::FloatTyID:
1039 Result.FloatVal = *((float*)Ptr);
1041 case Type::DoubleTyID:
1042 Result.DoubleVal = *((double*)Ptr);
1044 case Type::PointerTyID:
1045 Result.PointerVal = *((PointerTy*)Ptr);
1047 case Type::X86_FP80TyID: {
1048 // This is endian dependent, but it will only work on x86 anyway.
1049 // FIXME: Will not trap if loading a signaling NaN.
1052 Result.IntVal = APInt(80, y);
1055 case Type::VectorTyID: {
1056 const VectorType *VT = cast<VectorType>(Ty);
1057 const Type *ElemT = VT->getElementType();
1058 const unsigned numElems = VT->getNumElements();
1059 if (ElemT->isFloatTy()) {
1060 Result.AggregateVal.resize(numElems);
1061 for (unsigned i = 0; i < numElems; ++i)
1062 Result.AggregateVal[i].FloatVal = *((float*)Ptr+i);
1064 if (ElemT->isDoubleTy()) {
1065 Result.AggregateVal.resize(numElems);
1066 for (unsigned i = 0; i < numElems; ++i)
1067 Result.AggregateVal[i].DoubleVal = *((double*)Ptr+i);
1069 if (ElemT->isIntegerTy()) {
1070 GenericValue intZero;
1071 const unsigned elemBitWidth = cast<IntegerType>(ElemT)->getBitWidth();
1072 intZero.IntVal = APInt(elemBitWidth, 0);
1073 Result.AggregateVal.resize(numElems, intZero);
1074 for (unsigned i = 0; i < numElems; ++i)
1075 LoadIntFromMemory(Result.AggregateVal[i].IntVal,
1076 (uint8_t*)Ptr+((elemBitWidth+7)/8)*i, (elemBitWidth+7)/8);
1081 SmallString<256> Msg;
1082 raw_svector_ostream OS(Msg);
1083 OS << "Cannot load value of type " << *Ty << "!";
1084 report_fatal_error(OS.str());
1088 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
1089 DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
1090 DEBUG(Init->dump());
1091 if (isa<UndefValue>(Init))
1094 if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
1095 unsigned ElementSize =
1096 getDataLayout()->getTypeAllocSize(CP->getType()->getElementType());
1097 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
1098 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
1102 if (isa<ConstantAggregateZero>(Init)) {
1103 memset(Addr, 0, (size_t)getDataLayout()->getTypeAllocSize(Init->getType()));
1107 if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
1108 unsigned ElementSize =
1109 getDataLayout()->getTypeAllocSize(CPA->getType()->getElementType());
1110 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
1111 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
1115 if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
1116 const StructLayout *SL =
1117 getDataLayout()->getStructLayout(cast<StructType>(CPS->getType()));
1118 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
1119 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
1123 if (const ConstantDataSequential *CDS =
1124 dyn_cast<ConstantDataSequential>(Init)) {
1125 // CDS is already laid out in host memory order.
1126 StringRef Data = CDS->getRawDataValues();
1127 memcpy(Addr, Data.data(), Data.size());
1131 if (Init->getType()->isFirstClassType()) {
1132 GenericValue Val = getConstantValue(Init);
1133 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
1137 DEBUG(dbgs() << "Bad Type: " << *Init->getType() << "\n");
1138 llvm_unreachable("Unknown constant type to initialize memory with!");
1141 /// EmitGlobals - Emit all of the global variables to memory, storing their
1142 /// addresses into GlobalAddress. This must make sure to copy the contents of
1143 /// their initializers into the memory.
1144 void ExecutionEngine::emitGlobals() {
1145 // Loop over all of the global variables in the program, allocating the memory
1146 // to hold them. If there is more than one module, do a prepass over globals
1147 // to figure out how the different modules should link together.
1148 std::map<std::pair<std::string, Type*>,
1149 const GlobalValue*> LinkedGlobalsMap;
1151 if (Modules.size() != 1) {
1152 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
1153 Module &M = *Modules[m];
1154 for (const auto &GV : M.globals()) {
1155 if (GV.hasLocalLinkage() || GV.isDeclaration() ||
1156 GV.hasAppendingLinkage() || !GV.hasName())
1157 continue;// Ignore external globals and globals with internal linkage.
1159 const GlobalValue *&GVEntry =
1160 LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())];
1162 // If this is the first time we've seen this global, it is the canonical
1169 // If the existing global is strong, never replace it.
1170 if (GVEntry->hasExternalLinkage())
1173 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
1174 // symbol. FIXME is this right for common?
1175 if (GV.hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
1181 std::vector<const GlobalValue*> NonCanonicalGlobals;
1182 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
1183 Module &M = *Modules[m];
1184 for (const auto &GV : M.globals()) {
1185 // In the multi-module case, see what this global maps to.
1186 if (!LinkedGlobalsMap.empty()) {
1187 if (const GlobalValue *GVEntry =
1188 LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())]) {
1189 // If something else is the canonical global, ignore this one.
1190 if (GVEntry != &GV) {
1191 NonCanonicalGlobals.push_back(&GV);
1197 if (!GV.isDeclaration()) {
1198 addGlobalMapping(&GV, getMemoryForGV(&GV));
1200 // External variable reference. Try to use the dynamic loader to
1201 // get a pointer to it.
1203 sys::DynamicLibrary::SearchForAddressOfSymbol(GV.getName()))
1204 addGlobalMapping(&GV, SymAddr);
1206 report_fatal_error("Could not resolve external global address: "
1212 // If there are multiple modules, map the non-canonical globals to their
1213 // canonical location.
1214 if (!NonCanonicalGlobals.empty()) {
1215 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
1216 const GlobalValue *GV = NonCanonicalGlobals[i];
1217 const GlobalValue *CGV =
1218 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1219 void *Ptr = getPointerToGlobalIfAvailable(CGV);
1220 assert(Ptr && "Canonical global wasn't codegen'd!");
1221 addGlobalMapping(GV, Ptr);
1225 // Now that all of the globals are set up in memory, loop through them all
1226 // and initialize their contents.
1227 for (const auto &GV : M.globals()) {
1228 if (!GV.isDeclaration()) {
1229 if (!LinkedGlobalsMap.empty()) {
1230 if (const GlobalValue *GVEntry =
1231 LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())])
1232 if (GVEntry != &GV) // Not the canonical variable.
1235 EmitGlobalVariable(&GV);
1241 // EmitGlobalVariable - This method emits the specified global variable to the
1242 // address specified in GlobalAddresses, or allocates new memory if it's not
1243 // already in the map.
1244 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1245 void *GA = getPointerToGlobalIfAvailable(GV);
1248 // If it's not already specified, allocate memory for the global.
1249 GA = getMemoryForGV(GV);
1251 // If we failed to allocate memory for this global, return.
1254 addGlobalMapping(GV, GA);
1257 // Don't initialize if it's thread local, let the client do it.
1258 if (!GV->isThreadLocal())
1259 InitializeMemory(GV->getInitializer(), GA);
1261 Type *ElTy = GV->getType()->getElementType();
1262 size_t GVSize = (size_t)getDataLayout()->getTypeAllocSize(ElTy);
1263 NumInitBytes += (unsigned)GVSize;
1267 ExecutionEngineState::ExecutionEngineState(ExecutionEngine &EE)
1268 : EE(EE), GlobalAddressMap(this) {
1272 ExecutionEngineState::AddressMapConfig::getMutex(ExecutionEngineState *EES) {
1273 return &EES->EE.lock;
1276 void ExecutionEngineState::AddressMapConfig::onDelete(ExecutionEngineState *EES,
1277 const GlobalValue *Old) {
1278 void *OldVal = EES->GlobalAddressMap.lookup(Old);
1279 EES->GlobalAddressReverseMap.erase(OldVal);
1282 void ExecutionEngineState::AddressMapConfig::onRAUW(ExecutionEngineState *,
1283 const GlobalValue *,
1284 const GlobalValue *) {
1285 llvm_unreachable("The ExecutionEngine doesn't know how to handle a"
1286 " RAUW on a value it has a global mapping for.");