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/STLExtras.h"
17 #include "llvm/ADT/SmallString.h"
18 #include "llvm/ADT/Statistic.h"
19 #include "llvm/ExecutionEngine/GenericValue.h"
20 #include "llvm/ExecutionEngine/JITEventListener.h"
21 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
22 #include "llvm/IR/Constants.h"
23 #include "llvm/IR/DataLayout.h"
24 #include "llvm/IR/DerivedTypes.h"
25 #include "llvm/IR/Module.h"
26 #include "llvm/IR/Operator.h"
27 #include "llvm/IR/ValueHandle.h"
28 #include "llvm/Object/Archive.h"
29 #include "llvm/Object/ObjectFile.h"
30 #include "llvm/Support/Debug.h"
31 #include "llvm/Support/DynamicLibrary.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/Host.h"
34 #include "llvm/Support/MutexGuard.h"
35 #include "llvm/Support/TargetRegistry.h"
36 #include "llvm/Support/raw_ostream.h"
37 #include "llvm/Target/TargetMachine.h"
42 #define DEBUG_TYPE "jit"
44 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
45 STATISTIC(NumGlobals , "Number of global vars initialized");
47 ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
48 std::unique_ptr<Module> M, std::string *ErrorStr,
49 std::shared_ptr<MCJITMemoryManager> MemMgr,
50 std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver,
51 std::unique_ptr<TargetMachine> TM) = nullptr;
53 ExecutionEngine *(*ExecutionEngine::OrcMCJITReplacementCtor)(
54 std::string *ErrorStr, std::shared_ptr<MCJITMemoryManager> MemMgr,
55 std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver,
56 std::unique_ptr<TargetMachine> TM) = nullptr;
58 ExecutionEngine *(*ExecutionEngine::InterpCtor)(std::unique_ptr<Module> M,
59 std::string *ErrorStr) =nullptr;
61 void JITEventListener::anchor() {}
63 ExecutionEngine::ExecutionEngine(std::unique_ptr<Module> M)
65 LazyFunctionCreator(nullptr) {
66 CompilingLazily = false;
67 GVCompilationDisabled = false;
68 SymbolSearchingDisabled = false;
70 // IR module verification is enabled by default in debug builds, and disabled
71 // by default in release builds.
75 VerifyModules = false;
78 assert(M && "Module is null?");
79 Modules.push_back(std::move(M));
82 ExecutionEngine::~ExecutionEngine() {
83 clearAllGlobalMappings();
87 /// \brief Helper class which uses a value handler to automatically deletes the
88 /// memory block when the GlobalVariable is destroyed.
89 class GVMemoryBlock : public CallbackVH {
90 GVMemoryBlock(const GlobalVariable *GV)
91 : CallbackVH(const_cast<GlobalVariable*>(GV)) {}
94 /// \brief Returns the address the GlobalVariable should be written into. The
95 /// GVMemoryBlock object prefixes that.
96 static char *Create(const GlobalVariable *GV, const DataLayout& TD) {
97 Type *ElTy = GV->getType()->getElementType();
98 size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
99 void *RawMemory = ::operator new(
100 RoundUpToAlignment(sizeof(GVMemoryBlock),
101 TD.getPreferredAlignment(GV))
103 new(RawMemory) GVMemoryBlock(GV);
104 return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
107 void deleted() override {
108 // We allocated with operator new and with some extra memory hanging off the
109 // end, so don't just delete this. I'm not sure if this is actually
111 this->~GVMemoryBlock();
112 ::operator delete(this);
115 } // anonymous namespace
117 char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
118 return GVMemoryBlock::Create(GV, *getDataLayout());
121 void ExecutionEngine::addObjectFile(std::unique_ptr<object::ObjectFile> O) {
122 llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
126 ExecutionEngine::addObjectFile(object::OwningBinary<object::ObjectFile> O) {
127 llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
130 void ExecutionEngine::addArchive(object::OwningBinary<object::Archive> A) {
131 llvm_unreachable("ExecutionEngine subclass doesn't implement addArchive.");
134 bool ExecutionEngine::removeModule(Module *M) {
135 for (auto I = Modules.begin(), E = Modules.end(); I != E; ++I) {
136 Module *Found = I->get();
140 clearGlobalMappingsFromModule(M);
147 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
148 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
149 Function *F = Modules[i]->getFunction(FnName);
150 if (F && !F->isDeclaration())
157 void *ExecutionEngineState::RemoveMapping(const GlobalValue *ToUnmap) {
158 GlobalAddressMapTy::iterator I = GlobalAddressMap.find(ToUnmap);
161 // FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
163 if (I == GlobalAddressMap.end())
167 GlobalAddressMap.erase(I);
170 GlobalAddressReverseMap.erase(OldVal);
174 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
175 MutexGuard locked(lock);
177 DEBUG(dbgs() << "JIT: Map \'" << GV->getName()
178 << "\' to [" << Addr << "]\n";);
179 void *&CurVal = EEState.getGlobalAddressMap()[GV];
180 assert((!CurVal || !Addr) && "GlobalMapping already established!");
183 // If we are using the reverse mapping, add it too.
184 if (!EEState.getGlobalAddressReverseMap().empty()) {
185 AssertingVH<const GlobalValue> &V =
186 EEState.getGlobalAddressReverseMap()[Addr];
187 assert((!V || !GV) && "GlobalMapping already established!");
192 void ExecutionEngine::clearAllGlobalMappings() {
193 MutexGuard locked(lock);
195 EEState.getGlobalAddressMap().clear();
196 EEState.getGlobalAddressReverseMap().clear();
199 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
200 MutexGuard locked(lock);
202 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
203 EEState.RemoveMapping(FI);
204 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
206 EEState.RemoveMapping(GI);
209 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
210 MutexGuard locked(lock);
212 ExecutionEngineState::GlobalAddressMapTy &Map =
213 EEState.getGlobalAddressMap();
215 // Deleting from the mapping?
217 return EEState.RemoveMapping(GV);
219 void *&CurVal = Map[GV];
220 void *OldVal = CurVal;
222 if (CurVal && !EEState.getGlobalAddressReverseMap().empty())
223 EEState.getGlobalAddressReverseMap().erase(CurVal);
226 // If we are using the reverse mapping, add it too.
227 if (!EEState.getGlobalAddressReverseMap().empty()) {
228 AssertingVH<const GlobalValue> &V =
229 EEState.getGlobalAddressReverseMap()[Addr];
230 assert((!V || !GV) && "GlobalMapping already established!");
236 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
237 MutexGuard locked(lock);
239 ExecutionEngineState::GlobalAddressMapTy::iterator I =
240 EEState.getGlobalAddressMap().find(GV);
241 return I != EEState.getGlobalAddressMap().end() ? I->second : nullptr;
244 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
245 MutexGuard locked(lock);
247 // If we haven't computed the reverse mapping yet, do so first.
248 if (EEState.getGlobalAddressReverseMap().empty()) {
249 for (ExecutionEngineState::GlobalAddressMapTy::iterator
250 I = EEState.getGlobalAddressMap().begin(),
251 E = EEState.getGlobalAddressMap().end(); I != E; ++I)
252 EEState.getGlobalAddressReverseMap().insert(std::make_pair(
253 I->second, I->first));
256 std::map<void *, AssertingVH<const GlobalValue> >::iterator I =
257 EEState.getGlobalAddressReverseMap().find(Addr);
258 return I != EEState.getGlobalAddressReverseMap().end() ? I->second : nullptr;
263 std::unique_ptr<char[]> Array;
264 std::vector<std::unique_ptr<char[]>> Values;
266 /// Turn a vector of strings into a nice argv style array of pointers to null
267 /// terminated strings.
268 void *reset(LLVMContext &C, ExecutionEngine *EE,
269 const std::vector<std::string> &InputArgv);
271 } // anonymous namespace
272 void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
273 const std::vector<std::string> &InputArgv) {
274 Values.clear(); // Free the old contents.
275 Values.reserve(InputArgv.size());
276 unsigned PtrSize = EE->getDataLayout()->getPointerSize();
277 Array = make_unique<char[]>((InputArgv.size()+1)*PtrSize);
279 DEBUG(dbgs() << "JIT: ARGV = " << (void*)Array.get() << "\n");
280 Type *SBytePtr = Type::getInt8PtrTy(C);
282 for (unsigned i = 0; i != InputArgv.size(); ++i) {
283 unsigned Size = InputArgv[i].size()+1;
284 auto Dest = make_unique<char[]>(Size);
285 DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void*)Dest.get() << "\n");
287 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest.get());
290 // Endian safe: Array[i] = (PointerTy)Dest;
291 EE->StoreValueToMemory(PTOGV(Dest.get()),
292 (GenericValue*)(&Array[i*PtrSize]), SBytePtr);
293 Values.push_back(std::move(Dest));
297 EE->StoreValueToMemory(PTOGV(nullptr),
298 (GenericValue*)(&Array[InputArgv.size()*PtrSize]),
303 void ExecutionEngine::runStaticConstructorsDestructors(Module &module,
305 const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
306 GlobalVariable *GV = module.getNamedGlobal(Name);
308 // If this global has internal linkage, or if it has a use, then it must be
309 // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
310 // this is the case, don't execute any of the global ctors, __main will do
312 if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
314 // Should be an array of '{ i32, void ()* }' structs. The first value is
315 // the init priority, which we ignore.
316 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
319 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
320 ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i));
323 Constant *FP = CS->getOperand(1);
324 if (FP->isNullValue())
325 continue; // Found a sentinal value, ignore.
327 // Strip off constant expression casts.
328 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
330 FP = CE->getOperand(0);
332 // Execute the ctor/dtor function!
333 if (Function *F = dyn_cast<Function>(FP))
334 runFunction(F, std::vector<GenericValue>());
336 // FIXME: It is marginally lame that we just do nothing here if we see an
337 // entry we don't recognize. It might not be unreasonable for the verifier
338 // to not even allow this and just assert here.
342 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
343 // Execute global ctors/dtors for each module in the program.
344 for (std::unique_ptr<Module> &M : Modules)
345 runStaticConstructorsDestructors(*M, isDtors);
349 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
350 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
351 unsigned PtrSize = EE->getDataLayout()->getPointerSize();
352 for (unsigned i = 0; i < PtrSize; ++i)
353 if (*(i + (uint8_t*)Loc))
359 int ExecutionEngine::runFunctionAsMain(Function *Fn,
360 const std::vector<std::string> &argv,
361 const char * const * envp) {
362 std::vector<GenericValue> GVArgs;
364 GVArgc.IntVal = APInt(32, argv.size());
367 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
368 FunctionType *FTy = Fn->getFunctionType();
369 Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
371 // Check the argument types.
373 report_fatal_error("Invalid number of arguments of main() supplied");
374 if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
375 report_fatal_error("Invalid type for third argument of main() supplied");
376 if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
377 report_fatal_error("Invalid type for second argument of main() supplied");
378 if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
379 report_fatal_error("Invalid type for first argument of main() supplied");
380 if (!FTy->getReturnType()->isIntegerTy() &&
381 !FTy->getReturnType()->isVoidTy())
382 report_fatal_error("Invalid return type of main() supplied");
387 GVArgs.push_back(GVArgc); // Arg #0 = argc.
390 GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
391 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
392 "argv[0] was null after CreateArgv");
394 std::vector<std::string> EnvVars;
395 for (unsigned i = 0; envp[i]; ++i)
396 EnvVars.push_back(envp[i]);
398 GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
403 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
406 EngineBuilder::EngineBuilder() : EngineBuilder(nullptr) {}
408 EngineBuilder::EngineBuilder(std::unique_ptr<Module> M)
409 : M(std::move(M)), WhichEngine(EngineKind::Either), ErrorStr(nullptr),
410 OptLevel(CodeGenOpt::Default), MemMgr(nullptr), Resolver(nullptr),
411 RelocModel(Reloc::Default), CMModel(CodeModel::JITDefault),
412 UseOrcMCJITReplacement(false) {
413 // IR module verification is enabled by default in debug builds, and disabled
414 // by default in release builds.
416 VerifyModules = true;
418 VerifyModules = false;
422 EngineBuilder::~EngineBuilder() = default;
424 EngineBuilder &EngineBuilder::setMCJITMemoryManager(
425 std::unique_ptr<RTDyldMemoryManager> mcjmm) {
426 auto SharedMM = std::shared_ptr<RTDyldMemoryManager>(std::move(mcjmm));
433 EngineBuilder::setMemoryManager(std::unique_ptr<MCJITMemoryManager> MM) {
434 MemMgr = std::shared_ptr<MCJITMemoryManager>(std::move(MM));
439 EngineBuilder::setSymbolResolver(std::unique_ptr<RuntimeDyld::SymbolResolver> SR) {
440 Resolver = std::shared_ptr<RuntimeDyld::SymbolResolver>(std::move(SR));
444 ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
445 std::unique_ptr<TargetMachine> TheTM(TM); // Take ownership.
447 // Make sure we can resolve symbols in the program as well. The zero arg
448 // to the function tells DynamicLibrary to load the program, not a library.
449 if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr, ErrorStr))
452 // If the user specified a memory manager but didn't specify which engine to
453 // create, we assume they only want the JIT, and we fail if they only want
456 if (WhichEngine & EngineKind::JIT)
457 WhichEngine = EngineKind::JIT;
460 *ErrorStr = "Cannot create an interpreter with a memory manager.";
465 // Unless the interpreter was explicitly selected or the JIT is not linked,
467 if ((WhichEngine & EngineKind::JIT) && TheTM) {
468 Triple TT(M->getTargetTriple());
469 if (!TM->getTarget().hasJIT()) {
470 errs() << "WARNING: This target JIT is not designed for the host"
471 << " you are running. If bad things happen, please choose"
472 << " a different -march switch.\n";
475 ExecutionEngine *EE = nullptr;
476 if (ExecutionEngine::OrcMCJITReplacementCtor && UseOrcMCJITReplacement) {
477 EE = ExecutionEngine::OrcMCJITReplacementCtor(ErrorStr, std::move(MemMgr),
480 EE->addModule(std::move(M));
481 } else if (ExecutionEngine::MCJITCtor)
482 EE = ExecutionEngine::MCJITCtor(std::move(M), ErrorStr, std::move(MemMgr),
483 std::move(Resolver), std::move(TheTM));
486 EE->setVerifyModules(VerifyModules);
491 // If we can't make a JIT and we didn't request one specifically, try making
492 // an interpreter instead.
493 if (WhichEngine & EngineKind::Interpreter) {
494 if (ExecutionEngine::InterpCtor)
495 return ExecutionEngine::InterpCtor(std::move(M), ErrorStr);
497 *ErrorStr = "Interpreter has not been linked in.";
501 if ((WhichEngine & EngineKind::JIT) && !ExecutionEngine::MCJITCtor) {
503 *ErrorStr = "JIT has not been linked in.";
509 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
510 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
511 return getPointerToFunction(F);
513 MutexGuard locked(lock);
514 if (void *P = EEState.getGlobalAddressMap()[GV])
517 // Global variable might have been added since interpreter started.
518 if (GlobalVariable *GVar =
519 const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
520 EmitGlobalVariable(GVar);
522 llvm_unreachable("Global hasn't had an address allocated yet!");
524 return EEState.getGlobalAddressMap()[GV];
527 /// \brief Converts a Constant* into a GenericValue, including handling of
528 /// ConstantExpr values.
529 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
530 // If its undefined, return the garbage.
531 if (isa<UndefValue>(C)) {
533 switch (C->getType()->getTypeID()) {
536 case Type::IntegerTyID:
537 case Type::X86_FP80TyID:
538 case Type::FP128TyID:
539 case Type::PPC_FP128TyID:
540 // Although the value is undefined, we still have to construct an APInt
541 // with the correct bit width.
542 Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
544 case Type::StructTyID: {
545 // if the whole struct is 'undef' just reserve memory for the value.
546 if(StructType *STy = dyn_cast<StructType>(C->getType())) {
547 unsigned int elemNum = STy->getNumElements();
548 Result.AggregateVal.resize(elemNum);
549 for (unsigned int i = 0; i < elemNum; ++i) {
550 Type *ElemTy = STy->getElementType(i);
551 if (ElemTy->isIntegerTy())
552 Result.AggregateVal[i].IntVal =
553 APInt(ElemTy->getPrimitiveSizeInBits(), 0);
554 else if (ElemTy->isAggregateType()) {
555 const Constant *ElemUndef = UndefValue::get(ElemTy);
556 Result.AggregateVal[i] = getConstantValue(ElemUndef);
562 case Type::VectorTyID:
563 // if the whole vector is 'undef' just reserve memory for the value.
564 const VectorType* VTy = dyn_cast<VectorType>(C->getType());
565 const Type *ElemTy = VTy->getElementType();
566 unsigned int elemNum = VTy->getNumElements();
567 Result.AggregateVal.resize(elemNum);
568 if (ElemTy->isIntegerTy())
569 for (unsigned int i = 0; i < elemNum; ++i)
570 Result.AggregateVal[i].IntVal =
571 APInt(ElemTy->getPrimitiveSizeInBits(), 0);
577 // Otherwise, if the value is a ConstantExpr...
578 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
579 Constant *Op0 = CE->getOperand(0);
580 switch (CE->getOpcode()) {
581 case Instruction::GetElementPtr: {
583 GenericValue Result = getConstantValue(Op0);
584 APInt Offset(DL->getPointerSizeInBits(), 0);
585 cast<GEPOperator>(CE)->accumulateConstantOffset(*DL, Offset);
587 char* tmp = (char*) Result.PointerVal;
588 Result = PTOGV(tmp + Offset.getSExtValue());
591 case Instruction::Trunc: {
592 GenericValue GV = getConstantValue(Op0);
593 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
594 GV.IntVal = GV.IntVal.trunc(BitWidth);
597 case Instruction::ZExt: {
598 GenericValue GV = getConstantValue(Op0);
599 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
600 GV.IntVal = GV.IntVal.zext(BitWidth);
603 case Instruction::SExt: {
604 GenericValue GV = getConstantValue(Op0);
605 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
606 GV.IntVal = GV.IntVal.sext(BitWidth);
609 case Instruction::FPTrunc: {
611 GenericValue GV = getConstantValue(Op0);
612 GV.FloatVal = float(GV.DoubleVal);
615 case Instruction::FPExt:{
617 GenericValue GV = getConstantValue(Op0);
618 GV.DoubleVal = double(GV.FloatVal);
621 case Instruction::UIToFP: {
622 GenericValue GV = getConstantValue(Op0);
623 if (CE->getType()->isFloatTy())
624 GV.FloatVal = float(GV.IntVal.roundToDouble());
625 else if (CE->getType()->isDoubleTy())
626 GV.DoubleVal = GV.IntVal.roundToDouble();
627 else if (CE->getType()->isX86_FP80Ty()) {
628 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
629 (void)apf.convertFromAPInt(GV.IntVal,
631 APFloat::rmNearestTiesToEven);
632 GV.IntVal = apf.bitcastToAPInt();
636 case Instruction::SIToFP: {
637 GenericValue GV = getConstantValue(Op0);
638 if (CE->getType()->isFloatTy())
639 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
640 else if (CE->getType()->isDoubleTy())
641 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
642 else if (CE->getType()->isX86_FP80Ty()) {
643 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
644 (void)apf.convertFromAPInt(GV.IntVal,
646 APFloat::rmNearestTiesToEven);
647 GV.IntVal = apf.bitcastToAPInt();
651 case Instruction::FPToUI: // double->APInt conversion handles sign
652 case Instruction::FPToSI: {
653 GenericValue GV = getConstantValue(Op0);
654 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
655 if (Op0->getType()->isFloatTy())
656 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
657 else if (Op0->getType()->isDoubleTy())
658 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
659 else if (Op0->getType()->isX86_FP80Ty()) {
660 APFloat apf = APFloat(APFloat::x87DoubleExtended, GV.IntVal);
663 (void)apf.convertToInteger(&v, BitWidth,
664 CE->getOpcode()==Instruction::FPToSI,
665 APFloat::rmTowardZero, &ignored);
666 GV.IntVal = v; // endian?
670 case Instruction::PtrToInt: {
671 GenericValue GV = getConstantValue(Op0);
672 uint32_t PtrWidth = DL->getTypeSizeInBits(Op0->getType());
673 assert(PtrWidth <= 64 && "Bad pointer width");
674 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
675 uint32_t IntWidth = DL->getTypeSizeInBits(CE->getType());
676 GV.IntVal = GV.IntVal.zextOrTrunc(IntWidth);
679 case Instruction::IntToPtr: {
680 GenericValue GV = getConstantValue(Op0);
681 uint32_t PtrWidth = DL->getTypeSizeInBits(CE->getType());
682 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
683 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
684 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
687 case Instruction::BitCast: {
688 GenericValue GV = getConstantValue(Op0);
689 Type* DestTy = CE->getType();
690 switch (Op0->getType()->getTypeID()) {
691 default: llvm_unreachable("Invalid bitcast operand");
692 case Type::IntegerTyID:
693 assert(DestTy->isFloatingPointTy() && "invalid bitcast");
694 if (DestTy->isFloatTy())
695 GV.FloatVal = GV.IntVal.bitsToFloat();
696 else if (DestTy->isDoubleTy())
697 GV.DoubleVal = GV.IntVal.bitsToDouble();
699 case Type::FloatTyID:
700 assert(DestTy->isIntegerTy(32) && "Invalid bitcast");
701 GV.IntVal = APInt::floatToBits(GV.FloatVal);
703 case Type::DoubleTyID:
704 assert(DestTy->isIntegerTy(64) && "Invalid bitcast");
705 GV.IntVal = APInt::doubleToBits(GV.DoubleVal);
707 case Type::PointerTyID:
708 assert(DestTy->isPointerTy() && "Invalid bitcast");
709 break; // getConstantValue(Op0) above already converted it
713 case Instruction::Add:
714 case Instruction::FAdd:
715 case Instruction::Sub:
716 case Instruction::FSub:
717 case Instruction::Mul:
718 case Instruction::FMul:
719 case Instruction::UDiv:
720 case Instruction::SDiv:
721 case Instruction::URem:
722 case Instruction::SRem:
723 case Instruction::And:
724 case Instruction::Or:
725 case Instruction::Xor: {
726 GenericValue LHS = getConstantValue(Op0);
727 GenericValue RHS = getConstantValue(CE->getOperand(1));
729 switch (CE->getOperand(0)->getType()->getTypeID()) {
730 default: llvm_unreachable("Bad add type!");
731 case Type::IntegerTyID:
732 switch (CE->getOpcode()) {
733 default: llvm_unreachable("Invalid integer opcode");
734 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
735 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
736 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
737 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
738 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
739 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
740 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
741 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
742 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
743 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
746 case Type::FloatTyID:
747 switch (CE->getOpcode()) {
748 default: llvm_unreachable("Invalid float opcode");
749 case Instruction::FAdd:
750 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
751 case Instruction::FSub:
752 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
753 case Instruction::FMul:
754 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
755 case Instruction::FDiv:
756 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
757 case Instruction::FRem:
758 GV.FloatVal = std::fmod(LHS.FloatVal,RHS.FloatVal); break;
761 case Type::DoubleTyID:
762 switch (CE->getOpcode()) {
763 default: llvm_unreachable("Invalid double opcode");
764 case Instruction::FAdd:
765 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
766 case Instruction::FSub:
767 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
768 case Instruction::FMul:
769 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
770 case Instruction::FDiv:
771 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
772 case Instruction::FRem:
773 GV.DoubleVal = std::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
776 case Type::X86_FP80TyID:
777 case Type::PPC_FP128TyID:
778 case Type::FP128TyID: {
779 const fltSemantics &Sem = CE->getOperand(0)->getType()->getFltSemantics();
780 APFloat apfLHS = APFloat(Sem, LHS.IntVal);
781 switch (CE->getOpcode()) {
782 default: llvm_unreachable("Invalid long double opcode");
783 case Instruction::FAdd:
784 apfLHS.add(APFloat(Sem, RHS.IntVal), APFloat::rmNearestTiesToEven);
785 GV.IntVal = apfLHS.bitcastToAPInt();
787 case Instruction::FSub:
788 apfLHS.subtract(APFloat(Sem, RHS.IntVal),
789 APFloat::rmNearestTiesToEven);
790 GV.IntVal = apfLHS.bitcastToAPInt();
792 case Instruction::FMul:
793 apfLHS.multiply(APFloat(Sem, RHS.IntVal),
794 APFloat::rmNearestTiesToEven);
795 GV.IntVal = apfLHS.bitcastToAPInt();
797 case Instruction::FDiv:
798 apfLHS.divide(APFloat(Sem, RHS.IntVal),
799 APFloat::rmNearestTiesToEven);
800 GV.IntVal = apfLHS.bitcastToAPInt();
802 case Instruction::FRem:
803 apfLHS.mod(APFloat(Sem, RHS.IntVal),
804 APFloat::rmNearestTiesToEven);
805 GV.IntVal = apfLHS.bitcastToAPInt();
817 SmallString<256> Msg;
818 raw_svector_ostream OS(Msg);
819 OS << "ConstantExpr not handled: " << *CE;
820 report_fatal_error(OS.str());
823 // Otherwise, we have a simple constant.
825 switch (C->getType()->getTypeID()) {
826 case Type::FloatTyID:
827 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
829 case Type::DoubleTyID:
830 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
832 case Type::X86_FP80TyID:
833 case Type::FP128TyID:
834 case Type::PPC_FP128TyID:
835 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
837 case Type::IntegerTyID:
838 Result.IntVal = cast<ConstantInt>(C)->getValue();
840 case Type::PointerTyID:
841 if (isa<ConstantPointerNull>(C))
842 Result.PointerVal = nullptr;
843 else if (const Function *F = dyn_cast<Function>(C))
844 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
845 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
846 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
848 llvm_unreachable("Unknown constant pointer type!");
850 case Type::VectorTyID: {
853 const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(C);
854 const ConstantVector *CV = dyn_cast<ConstantVector>(C);
855 const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(C);
858 elemNum = CDV->getNumElements();
859 ElemTy = CDV->getElementType();
860 } else if (CV || CAZ) {
861 VectorType* VTy = dyn_cast<VectorType>(C->getType());
862 elemNum = VTy->getNumElements();
863 ElemTy = VTy->getElementType();
865 llvm_unreachable("Unknown constant vector type!");
868 Result.AggregateVal.resize(elemNum);
869 // Check if vector holds floats.
870 if(ElemTy->isFloatTy()) {
872 GenericValue floatZero;
873 floatZero.FloatVal = 0.f;
874 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
879 for (unsigned i = 0; i < elemNum; ++i)
880 if (!isa<UndefValue>(CV->getOperand(i)))
881 Result.AggregateVal[i].FloatVal = cast<ConstantFP>(
882 CV->getOperand(i))->getValueAPF().convertToFloat();
886 for (unsigned i = 0; i < elemNum; ++i)
887 Result.AggregateVal[i].FloatVal = CDV->getElementAsFloat(i);
891 // Check if vector holds doubles.
892 if (ElemTy->isDoubleTy()) {
894 GenericValue doubleZero;
895 doubleZero.DoubleVal = 0.0;
896 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
901 for (unsigned i = 0; i < elemNum; ++i)
902 if (!isa<UndefValue>(CV->getOperand(i)))
903 Result.AggregateVal[i].DoubleVal = cast<ConstantFP>(
904 CV->getOperand(i))->getValueAPF().convertToDouble();
908 for (unsigned i = 0; i < elemNum; ++i)
909 Result.AggregateVal[i].DoubleVal = CDV->getElementAsDouble(i);
913 // Check if vector holds integers.
914 if (ElemTy->isIntegerTy()) {
916 GenericValue intZero;
917 intZero.IntVal = APInt(ElemTy->getScalarSizeInBits(), 0ull);
918 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
923 for (unsigned i = 0; i < elemNum; ++i)
924 if (!isa<UndefValue>(CV->getOperand(i)))
925 Result.AggregateVal[i].IntVal = cast<ConstantInt>(
926 CV->getOperand(i))->getValue();
928 Result.AggregateVal[i].IntVal =
929 APInt(CV->getOperand(i)->getType()->getPrimitiveSizeInBits(), 0);
934 for (unsigned i = 0; i < elemNum; ++i)
935 Result.AggregateVal[i].IntVal = APInt(
936 CDV->getElementType()->getPrimitiveSizeInBits(),
937 CDV->getElementAsInteger(i));
941 llvm_unreachable("Unknown constant pointer type!");
946 SmallString<256> Msg;
947 raw_svector_ostream OS(Msg);
948 OS << "ERROR: Constant unimplemented for type: " << *C->getType();
949 report_fatal_error(OS.str());
955 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
956 /// with the integer held in IntVal.
957 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
958 unsigned StoreBytes) {
959 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
960 const uint8_t *Src = (const uint8_t *)IntVal.getRawData();
962 if (sys::IsLittleEndianHost) {
963 // Little-endian host - the source is ordered from LSB to MSB. Order the
964 // destination from LSB to MSB: Do a straight copy.
965 memcpy(Dst, Src, StoreBytes);
967 // Big-endian host - the source is an array of 64 bit words ordered from
968 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
969 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
970 while (StoreBytes > sizeof(uint64_t)) {
971 StoreBytes -= sizeof(uint64_t);
972 // May not be aligned so use memcpy.
973 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
974 Src += sizeof(uint64_t);
977 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
981 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
982 GenericValue *Ptr, Type *Ty) {
983 const unsigned StoreBytes = getDataLayout()->getTypeStoreSize(Ty);
985 switch (Ty->getTypeID()) {
987 dbgs() << "Cannot store value of type " << *Ty << "!\n";
989 case Type::IntegerTyID:
990 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
992 case Type::FloatTyID:
993 *((float*)Ptr) = Val.FloatVal;
995 case Type::DoubleTyID:
996 *((double*)Ptr) = Val.DoubleVal;
998 case Type::X86_FP80TyID:
999 memcpy(Ptr, Val.IntVal.getRawData(), 10);
1001 case Type::PointerTyID:
1002 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
1003 if (StoreBytes != sizeof(PointerTy))
1004 memset(&(Ptr->PointerVal), 0, StoreBytes);
1006 *((PointerTy*)Ptr) = Val.PointerVal;
1008 case Type::VectorTyID:
1009 for (unsigned i = 0; i < Val.AggregateVal.size(); ++i) {
1010 if (cast<VectorType>(Ty)->getElementType()->isDoubleTy())
1011 *(((double*)Ptr)+i) = Val.AggregateVal[i].DoubleVal;
1012 if (cast<VectorType>(Ty)->getElementType()->isFloatTy())
1013 *(((float*)Ptr)+i) = Val.AggregateVal[i].FloatVal;
1014 if (cast<VectorType>(Ty)->getElementType()->isIntegerTy()) {
1015 unsigned numOfBytes =(Val.AggregateVal[i].IntVal.getBitWidth()+7)/8;
1016 StoreIntToMemory(Val.AggregateVal[i].IntVal,
1017 (uint8_t*)Ptr + numOfBytes*i, numOfBytes);
1023 if (sys::IsLittleEndianHost != getDataLayout()->isLittleEndian())
1024 // Host and target are different endian - reverse the stored bytes.
1025 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
1028 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
1029 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
1030 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
1031 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
1032 uint8_t *Dst = reinterpret_cast<uint8_t *>(
1033 const_cast<uint64_t *>(IntVal.getRawData()));
1035 if (sys::IsLittleEndianHost)
1036 // Little-endian host - the destination must be ordered from LSB to MSB.
1037 // The source is ordered from LSB to MSB: Do a straight copy.
1038 memcpy(Dst, Src, LoadBytes);
1040 // Big-endian - the destination is an array of 64 bit words ordered from
1041 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
1042 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
1044 while (LoadBytes > sizeof(uint64_t)) {
1045 LoadBytes -= sizeof(uint64_t);
1046 // May not be aligned so use memcpy.
1047 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
1048 Dst += sizeof(uint64_t);
1051 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
1057 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
1060 const unsigned LoadBytes = getDataLayout()->getTypeStoreSize(Ty);
1062 switch (Ty->getTypeID()) {
1063 case Type::IntegerTyID:
1064 // An APInt with all words initially zero.
1065 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
1066 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
1068 case Type::FloatTyID:
1069 Result.FloatVal = *((float*)Ptr);
1071 case Type::DoubleTyID:
1072 Result.DoubleVal = *((double*)Ptr);
1074 case Type::PointerTyID:
1075 Result.PointerVal = *((PointerTy*)Ptr);
1077 case Type::X86_FP80TyID: {
1078 // This is endian dependent, but it will only work on x86 anyway.
1079 // FIXME: Will not trap if loading a signaling NaN.
1082 Result.IntVal = APInt(80, y);
1085 case Type::VectorTyID: {
1086 const VectorType *VT = cast<VectorType>(Ty);
1087 const Type *ElemT = VT->getElementType();
1088 const unsigned numElems = VT->getNumElements();
1089 if (ElemT->isFloatTy()) {
1090 Result.AggregateVal.resize(numElems);
1091 for (unsigned i = 0; i < numElems; ++i)
1092 Result.AggregateVal[i].FloatVal = *((float*)Ptr+i);
1094 if (ElemT->isDoubleTy()) {
1095 Result.AggregateVal.resize(numElems);
1096 for (unsigned i = 0; i < numElems; ++i)
1097 Result.AggregateVal[i].DoubleVal = *((double*)Ptr+i);
1099 if (ElemT->isIntegerTy()) {
1100 GenericValue intZero;
1101 const unsigned elemBitWidth = cast<IntegerType>(ElemT)->getBitWidth();
1102 intZero.IntVal = APInt(elemBitWidth, 0);
1103 Result.AggregateVal.resize(numElems, intZero);
1104 for (unsigned i = 0; i < numElems; ++i)
1105 LoadIntFromMemory(Result.AggregateVal[i].IntVal,
1106 (uint8_t*)Ptr+((elemBitWidth+7)/8)*i, (elemBitWidth+7)/8);
1111 SmallString<256> Msg;
1112 raw_svector_ostream OS(Msg);
1113 OS << "Cannot load value of type " << *Ty << "!";
1114 report_fatal_error(OS.str());
1118 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
1119 DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
1120 DEBUG(Init->dump());
1121 if (isa<UndefValue>(Init))
1124 if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
1125 unsigned ElementSize =
1126 getDataLayout()->getTypeAllocSize(CP->getType()->getElementType());
1127 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
1128 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
1132 if (isa<ConstantAggregateZero>(Init)) {
1133 memset(Addr, 0, (size_t)getDataLayout()->getTypeAllocSize(Init->getType()));
1137 if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
1138 unsigned ElementSize =
1139 getDataLayout()->getTypeAllocSize(CPA->getType()->getElementType());
1140 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
1141 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
1145 if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
1146 const StructLayout *SL =
1147 getDataLayout()->getStructLayout(cast<StructType>(CPS->getType()));
1148 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
1149 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
1153 if (const ConstantDataSequential *CDS =
1154 dyn_cast<ConstantDataSequential>(Init)) {
1155 // CDS is already laid out in host memory order.
1156 StringRef Data = CDS->getRawDataValues();
1157 memcpy(Addr, Data.data(), Data.size());
1161 if (Init->getType()->isFirstClassType()) {
1162 GenericValue Val = getConstantValue(Init);
1163 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
1167 DEBUG(dbgs() << "Bad Type: " << *Init->getType() << "\n");
1168 llvm_unreachable("Unknown constant type to initialize memory with!");
1171 /// EmitGlobals - Emit all of the global variables to memory, storing their
1172 /// addresses into GlobalAddress. This must make sure to copy the contents of
1173 /// their initializers into the memory.
1174 void ExecutionEngine::emitGlobals() {
1175 // Loop over all of the global variables in the program, allocating the memory
1176 // to hold them. If there is more than one module, do a prepass over globals
1177 // to figure out how the different modules should link together.
1178 std::map<std::pair<std::string, Type*>,
1179 const GlobalValue*> LinkedGlobalsMap;
1181 if (Modules.size() != 1) {
1182 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
1183 Module &M = *Modules[m];
1184 for (const auto &GV : M.globals()) {
1185 if (GV.hasLocalLinkage() || GV.isDeclaration() ||
1186 GV.hasAppendingLinkage() || !GV.hasName())
1187 continue;// Ignore external globals and globals with internal linkage.
1189 const GlobalValue *&GVEntry =
1190 LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())];
1192 // If this is the first time we've seen this global, it is the canonical
1199 // If the existing global is strong, never replace it.
1200 if (GVEntry->hasExternalLinkage())
1203 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
1204 // symbol. FIXME is this right for common?
1205 if (GV.hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
1211 std::vector<const GlobalValue*> NonCanonicalGlobals;
1212 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
1213 Module &M = *Modules[m];
1214 for (const auto &GV : M.globals()) {
1215 // In the multi-module case, see what this global maps to.
1216 if (!LinkedGlobalsMap.empty()) {
1217 if (const GlobalValue *GVEntry =
1218 LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())]) {
1219 // If something else is the canonical global, ignore this one.
1220 if (GVEntry != &GV) {
1221 NonCanonicalGlobals.push_back(&GV);
1227 if (!GV.isDeclaration()) {
1228 addGlobalMapping(&GV, getMemoryForGV(&GV));
1230 // External variable reference. Try to use the dynamic loader to
1231 // get a pointer to it.
1233 sys::DynamicLibrary::SearchForAddressOfSymbol(GV.getName()))
1234 addGlobalMapping(&GV, SymAddr);
1236 report_fatal_error("Could not resolve external global address: "
1242 // If there are multiple modules, map the non-canonical globals to their
1243 // canonical location.
1244 if (!NonCanonicalGlobals.empty()) {
1245 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
1246 const GlobalValue *GV = NonCanonicalGlobals[i];
1247 const GlobalValue *CGV =
1248 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1249 void *Ptr = getPointerToGlobalIfAvailable(CGV);
1250 assert(Ptr && "Canonical global wasn't codegen'd!");
1251 addGlobalMapping(GV, Ptr);
1255 // Now that all of the globals are set up in memory, loop through them all
1256 // and initialize their contents.
1257 for (const auto &GV : M.globals()) {
1258 if (!GV.isDeclaration()) {
1259 if (!LinkedGlobalsMap.empty()) {
1260 if (const GlobalValue *GVEntry =
1261 LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())])
1262 if (GVEntry != &GV) // Not the canonical variable.
1265 EmitGlobalVariable(&GV);
1271 // EmitGlobalVariable - This method emits the specified global variable to the
1272 // address specified in GlobalAddresses, or allocates new memory if it's not
1273 // already in the map.
1274 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1275 void *GA = getPointerToGlobalIfAvailable(GV);
1278 // If it's not already specified, allocate memory for the global.
1279 GA = getMemoryForGV(GV);
1281 // If we failed to allocate memory for this global, return.
1284 addGlobalMapping(GV, GA);
1287 // Don't initialize if it's thread local, let the client do it.
1288 if (!GV->isThreadLocal())
1289 InitializeMemory(GV->getInitializer(), GA);
1291 Type *ElTy = GV->getType()->getElementType();
1292 size_t GVSize = (size_t)getDataLayout()->getTypeAllocSize(ElTy);
1293 NumInitBytes += (unsigned)GVSize;
1297 ExecutionEngineState::ExecutionEngineState(ExecutionEngine &EE)
1298 : EE(EE), GlobalAddressMap(this) {
1302 ExecutionEngineState::AddressMapConfig::getMutex(ExecutionEngineState *EES) {
1303 return &EES->EE.lock;
1306 void ExecutionEngineState::AddressMapConfig::onDelete(ExecutionEngineState *EES,
1307 const GlobalValue *Old) {
1308 void *OldVal = EES->GlobalAddressMap.lookup(Old);
1309 EES->GlobalAddressReverseMap.erase(OldVal);
1312 void ExecutionEngineState::AddressMapConfig::onRAUW(ExecutionEngineState *,
1313 const GlobalValue *,
1314 const GlobalValue *) {
1315 llvm_unreachable("The ExecutionEngine doesn't know how to handle a"
1316 " RAUW on a value it has a global mapping for.");