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 #define DEBUG_TYPE "jit"
16 #include "llvm/ExecutionEngine/ExecutionEngine.h"
17 #include "llvm/ADT/SmallString.h"
18 #include "llvm/ADT/Statistic.h"
19 #include "llvm/ExecutionEngine/GenericValue.h"
20 #include "llvm/ExecutionEngine/JITMemoryManager.h"
21 #include "llvm/ExecutionEngine/ObjectCache.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/Support/Debug.h"
28 #include "llvm/Support/DynamicLibrary.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/Host.h"
31 #include "llvm/Support/MutexGuard.h"
32 #include "llvm/Support/TargetRegistry.h"
33 #include "llvm/Support/ValueHandle.h"
34 #include "llvm/Support/raw_ostream.h"
35 #include "llvm/Target/TargetMachine.h"
40 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
41 STATISTIC(NumGlobals , "Number of global vars initialized");
43 // Pin the vtable to this file.
44 void ObjectCache::anchor() {}
45 void ObjectBuffer::anchor() {}
46 void ObjectBufferStream::anchor() {}
48 ExecutionEngine *(*ExecutionEngine::JITCtor)(
50 std::string *ErrorStr,
51 JITMemoryManager *JMM,
53 TargetMachine *TM) = 0;
54 ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
56 std::string *ErrorStr,
57 RTDyldMemoryManager *MCJMM,
59 TargetMachine *TM) = 0;
60 ExecutionEngine *(*ExecutionEngine::InterpCtor)(Module *M,
61 std::string *ErrorStr) = 0;
63 ExecutionEngine::ExecutionEngine(Module *M)
65 LazyFunctionCreator(0) {
66 CompilingLazily = false;
67 GVCompilationDisabled = false;
68 SymbolSearchingDisabled = false;
70 assert(M && "Module is null?");
73 ExecutionEngine::~ExecutionEngine() {
74 clearAllGlobalMappings();
75 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
80 /// \brief Helper class which uses a value handler to automatically deletes the
81 /// memory block when the GlobalVariable is destroyed.
82 class GVMemoryBlock : public CallbackVH {
83 GVMemoryBlock(const GlobalVariable *GV)
84 : CallbackVH(const_cast<GlobalVariable*>(GV)) {}
87 /// \brief Returns the address the GlobalVariable should be written into. The
88 /// GVMemoryBlock object prefixes that.
89 static char *Create(const GlobalVariable *GV, const DataLayout& TD) {
90 Type *ElTy = GV->getType()->getElementType();
91 size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
92 void *RawMemory = ::operator new(
93 DataLayout::RoundUpAlignment(sizeof(GVMemoryBlock),
94 TD.getPreferredAlignment(GV))
96 new(RawMemory) GVMemoryBlock(GV);
97 return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
100 virtual void deleted() {
101 // We allocated with operator new and with some extra memory hanging off the
102 // end, so don't just delete this. I'm not sure if this is actually
104 this->~GVMemoryBlock();
105 ::operator delete(this);
108 } // anonymous namespace
110 char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
111 return GVMemoryBlock::Create(GV, *getDataLayout());
114 bool ExecutionEngine::removeModule(Module *M) {
115 for(SmallVectorImpl<Module *>::iterator I = Modules.begin(),
116 E = Modules.end(); I != E; ++I) {
120 clearGlobalMappingsFromModule(M);
127 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
128 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
129 if (Function *F = Modules[i]->getFunction(FnName))
136 void *ExecutionEngineState::RemoveMapping(const MutexGuard &,
137 const GlobalValue *ToUnmap) {
138 GlobalAddressMapTy::iterator I = GlobalAddressMap.find(ToUnmap);
141 // FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
143 if (I == GlobalAddressMap.end())
147 GlobalAddressMap.erase(I);
150 GlobalAddressReverseMap.erase(OldVal);
154 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
155 MutexGuard locked(lock);
157 DEBUG(dbgs() << "JIT: Map \'" << GV->getName()
158 << "\' to [" << Addr << "]\n";);
159 void *&CurVal = EEState.getGlobalAddressMap(locked)[GV];
160 assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
163 // If we are using the reverse mapping, add it too.
164 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
165 AssertingVH<const GlobalValue> &V =
166 EEState.getGlobalAddressReverseMap(locked)[Addr];
167 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
172 void ExecutionEngine::clearAllGlobalMappings() {
173 MutexGuard locked(lock);
175 EEState.getGlobalAddressMap(locked).clear();
176 EEState.getGlobalAddressReverseMap(locked).clear();
179 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
180 MutexGuard locked(lock);
182 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
183 EEState.RemoveMapping(locked, FI);
184 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
186 EEState.RemoveMapping(locked, GI);
189 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
190 MutexGuard locked(lock);
192 ExecutionEngineState::GlobalAddressMapTy &Map =
193 EEState.getGlobalAddressMap(locked);
195 // Deleting from the mapping?
197 return EEState.RemoveMapping(locked, GV);
199 void *&CurVal = Map[GV];
200 void *OldVal = CurVal;
202 if (CurVal && !EEState.getGlobalAddressReverseMap(locked).empty())
203 EEState.getGlobalAddressReverseMap(locked).erase(CurVal);
206 // If we are using the reverse mapping, add it too.
207 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
208 AssertingVH<const GlobalValue> &V =
209 EEState.getGlobalAddressReverseMap(locked)[Addr];
210 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
216 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
217 MutexGuard locked(lock);
219 ExecutionEngineState::GlobalAddressMapTy::iterator I =
220 EEState.getGlobalAddressMap(locked).find(GV);
221 return I != EEState.getGlobalAddressMap(locked).end() ? I->second : 0;
224 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
225 MutexGuard locked(lock);
227 // If we haven't computed the reverse mapping yet, do so first.
228 if (EEState.getGlobalAddressReverseMap(locked).empty()) {
229 for (ExecutionEngineState::GlobalAddressMapTy::iterator
230 I = EEState.getGlobalAddressMap(locked).begin(),
231 E = EEState.getGlobalAddressMap(locked).end(); I != E; ++I)
232 EEState.getGlobalAddressReverseMap(locked).insert(std::make_pair(
233 I->second, I->first));
236 std::map<void *, AssertingVH<const GlobalValue> >::iterator I =
237 EEState.getGlobalAddressReverseMap(locked).find(Addr);
238 return I != EEState.getGlobalAddressReverseMap(locked).end() ? I->second : 0;
244 std::vector<char*> Values;
246 ArgvArray() : Array(NULL) {}
247 ~ArgvArray() { clear(); }
251 for (size_t I = 0, E = Values.size(); I != E; ++I) {
256 /// Turn a vector of strings into a nice argv style array of pointers to null
257 /// terminated strings.
258 void *reset(LLVMContext &C, ExecutionEngine *EE,
259 const std::vector<std::string> &InputArgv);
261 } // anonymous namespace
262 void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
263 const std::vector<std::string> &InputArgv) {
264 clear(); // Free the old contents.
265 unsigned PtrSize = EE->getDataLayout()->getPointerSize();
266 Array = new char[(InputArgv.size()+1)*PtrSize];
268 DEBUG(dbgs() << "JIT: ARGV = " << (void*)Array << "\n");
269 Type *SBytePtr = Type::getInt8PtrTy(C);
271 for (unsigned i = 0; i != InputArgv.size(); ++i) {
272 unsigned Size = InputArgv[i].size()+1;
273 char *Dest = new char[Size];
274 Values.push_back(Dest);
275 DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void*)Dest << "\n");
277 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
280 // Endian safe: Array[i] = (PointerTy)Dest;
281 EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Array+i*PtrSize),
286 EE->StoreValueToMemory(PTOGV(0),
287 (GenericValue*)(Array+InputArgv.size()*PtrSize),
292 void ExecutionEngine::runStaticConstructorsDestructors(Module *module,
294 const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
295 GlobalVariable *GV = module->getNamedGlobal(Name);
297 // If this global has internal linkage, or if it has a use, then it must be
298 // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
299 // this is the case, don't execute any of the global ctors, __main will do
301 if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
303 // Should be an array of '{ i32, void ()* }' structs. The first value is
304 // the init priority, which we ignore.
305 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
308 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
309 ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i));
310 if (CS == 0) continue;
312 Constant *FP = CS->getOperand(1);
313 if (FP->isNullValue())
314 continue; // Found a sentinal value, ignore.
316 // Strip off constant expression casts.
317 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
319 FP = CE->getOperand(0);
321 // Execute the ctor/dtor function!
322 if (Function *F = dyn_cast<Function>(FP))
323 runFunction(F, std::vector<GenericValue>());
325 // FIXME: It is marginally lame that we just do nothing here if we see an
326 // entry we don't recognize. It might not be unreasonable for the verifier
327 // to not even allow this and just assert here.
331 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
332 // Execute global ctors/dtors for each module in the program.
333 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
334 runStaticConstructorsDestructors(Modules[i], isDtors);
338 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
339 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
340 unsigned PtrSize = EE->getDataLayout()->getPointerSize();
341 for (unsigned i = 0; i < PtrSize; ++i)
342 if (*(i + (uint8_t*)Loc))
348 int ExecutionEngine::runFunctionAsMain(Function *Fn,
349 const std::vector<std::string> &argv,
350 const char * const * envp) {
351 std::vector<GenericValue> GVArgs;
353 GVArgc.IntVal = APInt(32, argv.size());
356 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
357 FunctionType *FTy = Fn->getFunctionType();
358 Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
360 // Check the argument types.
362 report_fatal_error("Invalid number of arguments of main() supplied");
363 if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
364 report_fatal_error("Invalid type for third argument of main() supplied");
365 if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
366 report_fatal_error("Invalid type for second argument of main() supplied");
367 if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
368 report_fatal_error("Invalid type for first argument of main() supplied");
369 if (!FTy->getReturnType()->isIntegerTy() &&
370 !FTy->getReturnType()->isVoidTy())
371 report_fatal_error("Invalid return type of main() supplied");
376 GVArgs.push_back(GVArgc); // Arg #0 = argc.
379 GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
380 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
381 "argv[0] was null after CreateArgv");
383 std::vector<std::string> EnvVars;
384 for (unsigned i = 0; envp[i]; ++i)
385 EnvVars.push_back(envp[i]);
387 GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
392 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
395 ExecutionEngine *ExecutionEngine::create(Module *M,
396 bool ForceInterpreter,
397 std::string *ErrorStr,
398 CodeGenOpt::Level OptLevel,
400 EngineBuilder EB = EngineBuilder(M)
401 .setEngineKind(ForceInterpreter
402 ? EngineKind::Interpreter
404 .setErrorStr(ErrorStr)
405 .setOptLevel(OptLevel)
406 .setAllocateGVsWithCode(GVsWithCode);
411 /// createJIT - This is the factory method for creating a JIT for the current
412 /// machine, it does not fall back to the interpreter. This takes ownership
414 ExecutionEngine *ExecutionEngine::createJIT(Module *M,
415 std::string *ErrorStr,
416 JITMemoryManager *JMM,
417 CodeGenOpt::Level OL,
420 CodeModel::Model CMM) {
421 if (ExecutionEngine::JITCtor == 0) {
423 *ErrorStr = "JIT has not been linked in.";
427 // Use the defaults for extra parameters. Users can use EngineBuilder to
430 EB.setEngineKind(EngineKind::JIT);
431 EB.setErrorStr(ErrorStr);
432 EB.setRelocationModel(RM);
433 EB.setCodeModel(CMM);
434 EB.setAllocateGVsWithCode(GVsWithCode);
436 EB.setJITMemoryManager(JMM);
438 // TODO: permit custom TargetOptions here
439 TargetMachine *TM = EB.selectTarget();
440 if (!TM || (ErrorStr && ErrorStr->length() > 0)) return 0;
442 return ExecutionEngine::JITCtor(M, ErrorStr, JMM, GVsWithCode, TM);
445 ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
446 OwningPtr<TargetMachine> TheTM(TM); // Take ownership.
448 // Make sure we can resolve symbols in the program as well. The zero arg
449 // to the function tells DynamicLibrary to load the program, not a library.
450 if (sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr))
453 assert(!(JMM && MCJMM));
455 // If the user specified a memory manager but didn't specify which engine to
456 // create, we assume they only want the JIT, and we fail if they only want
459 if (WhichEngine & EngineKind::JIT)
460 WhichEngine = EngineKind::JIT;
463 *ErrorStr = "Cannot create an interpreter with a memory manager.";
468 if (MCJMM && ! UseMCJIT) {
471 "Cannot create a legacy JIT with a runtime dyld memory "
476 // Unless the interpreter was explicitly selected or the JIT is not linked,
478 if ((WhichEngine & EngineKind::JIT) && TheTM) {
479 Triple TT(M->getTargetTriple());
480 if (!TM->getTarget().hasJIT()) {
481 errs() << "WARNING: This target JIT is not designed for the host"
482 << " you are running. If bad things happen, please choose"
483 << " a different -march switch.\n";
486 if (UseMCJIT && ExecutionEngine::MCJITCtor) {
487 ExecutionEngine *EE =
488 ExecutionEngine::MCJITCtor(M, ErrorStr, MCJMM ? MCJMM : JMM,
489 AllocateGVsWithCode, TheTM.take());
491 } else if (ExecutionEngine::JITCtor) {
492 ExecutionEngine *EE =
493 ExecutionEngine::JITCtor(M, ErrorStr, JMM,
494 AllocateGVsWithCode, TheTM.take());
499 // If we can't make a JIT and we didn't request one specifically, try making
500 // an interpreter instead.
501 if (WhichEngine & EngineKind::Interpreter) {
502 if (ExecutionEngine::InterpCtor)
503 return ExecutionEngine::InterpCtor(M, ErrorStr);
505 *ErrorStr = "Interpreter has not been linked in.";
509 if ((WhichEngine & EngineKind::JIT) && ExecutionEngine::JITCtor == 0 &&
510 ExecutionEngine::MCJITCtor == 0) {
512 *ErrorStr = "JIT has not been linked in.";
518 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
519 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
520 return getPointerToFunction(F);
522 MutexGuard locked(lock);
523 if (void *P = EEState.getGlobalAddressMap(locked)[GV])
526 // Global variable might have been added since interpreter started.
527 if (GlobalVariable *GVar =
528 const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
529 EmitGlobalVariable(GVar);
531 llvm_unreachable("Global hasn't had an address allocated yet!");
533 return EEState.getGlobalAddressMap(locked)[GV];
536 /// \brief Converts a Constant* into a GenericValue, including handling of
537 /// ConstantExpr values.
538 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
539 // If its undefined, return the garbage.
540 if (isa<UndefValue>(C)) {
542 switch (C->getType()->getTypeID()) {
545 case Type::IntegerTyID:
546 case Type::X86_FP80TyID:
547 case Type::FP128TyID:
548 case Type::PPC_FP128TyID:
549 // Although the value is undefined, we still have to construct an APInt
550 // with the correct bit width.
551 Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
553 case Type::StructTyID: {
554 // if the whole struct is 'undef' just reserve memory for the value.
555 if(StructType *STy = dyn_cast<StructType>(C->getType())) {
556 unsigned int elemNum = STy->getNumElements();
557 Result.AggregateVal.resize(elemNum);
558 for (unsigned int i = 0; i < elemNum; ++i) {
559 Type *ElemTy = STy->getElementType(i);
560 if (ElemTy->isIntegerTy())
561 Result.AggregateVal[i].IntVal =
562 APInt(ElemTy->getPrimitiveSizeInBits(), 0);
563 else if (ElemTy->isAggregateType()) {
564 const Constant *ElemUndef = UndefValue::get(ElemTy);
565 Result.AggregateVal[i] = getConstantValue(ElemUndef);
571 case Type::VectorTyID:
572 // if the whole vector is 'undef' just reserve memory for the value.
573 const VectorType* VTy = dyn_cast<VectorType>(C->getType());
574 const Type *ElemTy = VTy->getElementType();
575 unsigned int elemNum = VTy->getNumElements();
576 Result.AggregateVal.resize(elemNum);
577 if (ElemTy->isIntegerTy())
578 for (unsigned int i = 0; i < elemNum; ++i)
579 Result.AggregateVal[i].IntVal =
580 APInt(ElemTy->getPrimitiveSizeInBits(), 0);
586 // Otherwise, if the value is a ConstantExpr...
587 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
588 Constant *Op0 = CE->getOperand(0);
589 switch (CE->getOpcode()) {
590 case Instruction::GetElementPtr: {
592 GenericValue Result = getConstantValue(Op0);
593 APInt Offset(DL->getPointerSizeInBits(), 0);
594 cast<GEPOperator>(CE)->accumulateConstantOffset(*DL, Offset);
596 char* tmp = (char*) Result.PointerVal;
597 Result = PTOGV(tmp + Offset.getSExtValue());
600 case Instruction::Trunc: {
601 GenericValue GV = getConstantValue(Op0);
602 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
603 GV.IntVal = GV.IntVal.trunc(BitWidth);
606 case Instruction::ZExt: {
607 GenericValue GV = getConstantValue(Op0);
608 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
609 GV.IntVal = GV.IntVal.zext(BitWidth);
612 case Instruction::SExt: {
613 GenericValue GV = getConstantValue(Op0);
614 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
615 GV.IntVal = GV.IntVal.sext(BitWidth);
618 case Instruction::FPTrunc: {
620 GenericValue GV = getConstantValue(Op0);
621 GV.FloatVal = float(GV.DoubleVal);
624 case Instruction::FPExt:{
626 GenericValue GV = getConstantValue(Op0);
627 GV.DoubleVal = double(GV.FloatVal);
630 case Instruction::UIToFP: {
631 GenericValue GV = getConstantValue(Op0);
632 if (CE->getType()->isFloatTy())
633 GV.FloatVal = float(GV.IntVal.roundToDouble());
634 else if (CE->getType()->isDoubleTy())
635 GV.DoubleVal = GV.IntVal.roundToDouble();
636 else if (CE->getType()->isX86_FP80Ty()) {
637 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
638 (void)apf.convertFromAPInt(GV.IntVal,
640 APFloat::rmNearestTiesToEven);
641 GV.IntVal = apf.bitcastToAPInt();
645 case Instruction::SIToFP: {
646 GenericValue GV = getConstantValue(Op0);
647 if (CE->getType()->isFloatTy())
648 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
649 else if (CE->getType()->isDoubleTy())
650 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
651 else if (CE->getType()->isX86_FP80Ty()) {
652 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
653 (void)apf.convertFromAPInt(GV.IntVal,
655 APFloat::rmNearestTiesToEven);
656 GV.IntVal = apf.bitcastToAPInt();
660 case Instruction::FPToUI: // double->APInt conversion handles sign
661 case Instruction::FPToSI: {
662 GenericValue GV = getConstantValue(Op0);
663 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
664 if (Op0->getType()->isFloatTy())
665 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
666 else if (Op0->getType()->isDoubleTy())
667 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
668 else if (Op0->getType()->isX86_FP80Ty()) {
669 APFloat apf = APFloat(APFloat::x87DoubleExtended, GV.IntVal);
672 (void)apf.convertToInteger(&v, BitWidth,
673 CE->getOpcode()==Instruction::FPToSI,
674 APFloat::rmTowardZero, &ignored);
675 GV.IntVal = v; // endian?
679 case Instruction::PtrToInt: {
680 GenericValue GV = getConstantValue(Op0);
681 uint32_t PtrWidth = DL->getTypeSizeInBits(Op0->getType());
682 assert(PtrWidth <= 64 && "Bad pointer width");
683 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
684 uint32_t IntWidth = DL->getTypeSizeInBits(CE->getType());
685 GV.IntVal = GV.IntVal.zextOrTrunc(IntWidth);
688 case Instruction::IntToPtr: {
689 GenericValue GV = getConstantValue(Op0);
690 uint32_t PtrWidth = DL->getTypeSizeInBits(CE->getType());
691 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
692 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
693 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
696 case Instruction::BitCast: {
697 GenericValue GV = getConstantValue(Op0);
698 Type* DestTy = CE->getType();
699 switch (Op0->getType()->getTypeID()) {
700 default: llvm_unreachable("Invalid bitcast operand");
701 case Type::IntegerTyID:
702 assert(DestTy->isFloatingPointTy() && "invalid bitcast");
703 if (DestTy->isFloatTy())
704 GV.FloatVal = GV.IntVal.bitsToFloat();
705 else if (DestTy->isDoubleTy())
706 GV.DoubleVal = GV.IntVal.bitsToDouble();
708 case Type::FloatTyID:
709 assert(DestTy->isIntegerTy(32) && "Invalid bitcast");
710 GV.IntVal = APInt::floatToBits(GV.FloatVal);
712 case Type::DoubleTyID:
713 assert(DestTy->isIntegerTy(64) && "Invalid bitcast");
714 GV.IntVal = APInt::doubleToBits(GV.DoubleVal);
716 case Type::PointerTyID:
717 assert(DestTy->isPointerTy() && "Invalid bitcast");
718 break; // getConstantValue(Op0) above already converted it
722 case Instruction::Add:
723 case Instruction::FAdd:
724 case Instruction::Sub:
725 case Instruction::FSub:
726 case Instruction::Mul:
727 case Instruction::FMul:
728 case Instruction::UDiv:
729 case Instruction::SDiv:
730 case Instruction::URem:
731 case Instruction::SRem:
732 case Instruction::And:
733 case Instruction::Or:
734 case Instruction::Xor: {
735 GenericValue LHS = getConstantValue(Op0);
736 GenericValue RHS = getConstantValue(CE->getOperand(1));
738 switch (CE->getOperand(0)->getType()->getTypeID()) {
739 default: llvm_unreachable("Bad add type!");
740 case Type::IntegerTyID:
741 switch (CE->getOpcode()) {
742 default: llvm_unreachable("Invalid integer opcode");
743 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
744 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
745 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
746 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
747 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
748 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
749 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
750 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
751 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
752 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
755 case Type::FloatTyID:
756 switch (CE->getOpcode()) {
757 default: llvm_unreachable("Invalid float opcode");
758 case Instruction::FAdd:
759 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
760 case Instruction::FSub:
761 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
762 case Instruction::FMul:
763 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
764 case Instruction::FDiv:
765 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
766 case Instruction::FRem:
767 GV.FloatVal = std::fmod(LHS.FloatVal,RHS.FloatVal); break;
770 case Type::DoubleTyID:
771 switch (CE->getOpcode()) {
772 default: llvm_unreachable("Invalid double opcode");
773 case Instruction::FAdd:
774 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
775 case Instruction::FSub:
776 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
777 case Instruction::FMul:
778 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
779 case Instruction::FDiv:
780 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
781 case Instruction::FRem:
782 GV.DoubleVal = std::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
785 case Type::X86_FP80TyID:
786 case Type::PPC_FP128TyID:
787 case Type::FP128TyID: {
788 const fltSemantics &Sem = CE->getOperand(0)->getType()->getFltSemantics();
789 APFloat apfLHS = APFloat(Sem, LHS.IntVal);
790 switch (CE->getOpcode()) {
791 default: llvm_unreachable("Invalid long double opcode");
792 case Instruction::FAdd:
793 apfLHS.add(APFloat(Sem, RHS.IntVal), APFloat::rmNearestTiesToEven);
794 GV.IntVal = apfLHS.bitcastToAPInt();
796 case Instruction::FSub:
797 apfLHS.subtract(APFloat(Sem, RHS.IntVal),
798 APFloat::rmNearestTiesToEven);
799 GV.IntVal = apfLHS.bitcastToAPInt();
801 case Instruction::FMul:
802 apfLHS.multiply(APFloat(Sem, RHS.IntVal),
803 APFloat::rmNearestTiesToEven);
804 GV.IntVal = apfLHS.bitcastToAPInt();
806 case Instruction::FDiv:
807 apfLHS.divide(APFloat(Sem, RHS.IntVal),
808 APFloat::rmNearestTiesToEven);
809 GV.IntVal = apfLHS.bitcastToAPInt();
811 case Instruction::FRem:
812 apfLHS.mod(APFloat(Sem, RHS.IntVal),
813 APFloat::rmNearestTiesToEven);
814 GV.IntVal = apfLHS.bitcastToAPInt();
826 SmallString<256> Msg;
827 raw_svector_ostream OS(Msg);
828 OS << "ConstantExpr not handled: " << *CE;
829 report_fatal_error(OS.str());
832 // Otherwise, we have a simple constant.
834 switch (C->getType()->getTypeID()) {
835 case Type::FloatTyID:
836 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
838 case Type::DoubleTyID:
839 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
841 case Type::X86_FP80TyID:
842 case Type::FP128TyID:
843 case Type::PPC_FP128TyID:
844 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
846 case Type::IntegerTyID:
847 Result.IntVal = cast<ConstantInt>(C)->getValue();
849 case Type::PointerTyID:
850 if (isa<ConstantPointerNull>(C))
851 Result.PointerVal = 0;
852 else if (const Function *F = dyn_cast<Function>(C))
853 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
854 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
855 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
856 else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C))
857 Result = PTOGV(getPointerToBasicBlock(const_cast<BasicBlock*>(
858 BA->getBasicBlock())));
860 llvm_unreachable("Unknown constant pointer type!");
862 case Type::VectorTyID: {
865 const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(C);
866 const ConstantVector *CV = dyn_cast<ConstantVector>(C);
867 const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(C);
870 elemNum = CDV->getNumElements();
871 ElemTy = CDV->getElementType();
872 } else if (CV || CAZ) {
873 VectorType* VTy = dyn_cast<VectorType>(C->getType());
874 elemNum = VTy->getNumElements();
875 ElemTy = VTy->getElementType();
877 llvm_unreachable("Unknown constant vector type!");
880 Result.AggregateVal.resize(elemNum);
881 // Check if vector holds floats.
882 if(ElemTy->isFloatTy()) {
884 GenericValue floatZero;
885 floatZero.FloatVal = 0.f;
886 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
891 for (unsigned i = 0; i < elemNum; ++i)
892 if (!isa<UndefValue>(CV->getOperand(i)))
893 Result.AggregateVal[i].FloatVal = cast<ConstantFP>(
894 CV->getOperand(i))->getValueAPF().convertToFloat();
898 for (unsigned i = 0; i < elemNum; ++i)
899 Result.AggregateVal[i].FloatVal = CDV->getElementAsFloat(i);
903 // Check if vector holds doubles.
904 if (ElemTy->isDoubleTy()) {
906 GenericValue doubleZero;
907 doubleZero.DoubleVal = 0.0;
908 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
913 for (unsigned i = 0; i < elemNum; ++i)
914 if (!isa<UndefValue>(CV->getOperand(i)))
915 Result.AggregateVal[i].DoubleVal = cast<ConstantFP>(
916 CV->getOperand(i))->getValueAPF().convertToDouble();
920 for (unsigned i = 0; i < elemNum; ++i)
921 Result.AggregateVal[i].DoubleVal = CDV->getElementAsDouble(i);
925 // Check if vector holds integers.
926 if (ElemTy->isIntegerTy()) {
928 GenericValue intZero;
929 intZero.IntVal = APInt(ElemTy->getScalarSizeInBits(), 0ull);
930 std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
935 for (unsigned i = 0; i < elemNum; ++i)
936 if (!isa<UndefValue>(CV->getOperand(i)))
937 Result.AggregateVal[i].IntVal = cast<ConstantInt>(
938 CV->getOperand(i))->getValue();
940 Result.AggregateVal[i].IntVal =
941 APInt(CV->getOperand(i)->getType()->getPrimitiveSizeInBits(), 0);
946 for (unsigned i = 0; i < elemNum; ++i)
947 Result.AggregateVal[i].IntVal = APInt(
948 CDV->getElementType()->getPrimitiveSizeInBits(),
949 CDV->getElementAsInteger(i));
953 llvm_unreachable("Unknown constant pointer type!");
958 SmallString<256> Msg;
959 raw_svector_ostream OS(Msg);
960 OS << "ERROR: Constant unimplemented for type: " << *C->getType();
961 report_fatal_error(OS.str());
967 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
968 /// with the integer held in IntVal.
969 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
970 unsigned StoreBytes) {
971 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
972 const uint8_t *Src = (const uint8_t *)IntVal.getRawData();
974 if (sys::IsLittleEndianHost) {
975 // Little-endian host - the source is ordered from LSB to MSB. Order the
976 // destination from LSB to MSB: Do a straight copy.
977 memcpy(Dst, Src, StoreBytes);
979 // Big-endian host - the source is an array of 64 bit words ordered from
980 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
981 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
982 while (StoreBytes > sizeof(uint64_t)) {
983 StoreBytes -= sizeof(uint64_t);
984 // May not be aligned so use memcpy.
985 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
986 Src += sizeof(uint64_t);
989 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
993 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
994 GenericValue *Ptr, Type *Ty) {
995 const unsigned StoreBytes = getDataLayout()->getTypeStoreSize(Ty);
997 switch (Ty->getTypeID()) {
999 dbgs() << "Cannot store value of type " << *Ty << "!\n";
1001 case Type::IntegerTyID:
1002 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
1004 case Type::FloatTyID:
1005 *((float*)Ptr) = Val.FloatVal;
1007 case Type::DoubleTyID:
1008 *((double*)Ptr) = Val.DoubleVal;
1010 case Type::X86_FP80TyID:
1011 memcpy(Ptr, Val.IntVal.getRawData(), 10);
1013 case Type::PointerTyID:
1014 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
1015 if (StoreBytes != sizeof(PointerTy))
1016 memset(&(Ptr->PointerVal), 0, StoreBytes);
1018 *((PointerTy*)Ptr) = Val.PointerVal;
1020 case Type::VectorTyID:
1021 for (unsigned i = 0; i < Val.AggregateVal.size(); ++i) {
1022 if (cast<VectorType>(Ty)->getElementType()->isDoubleTy())
1023 *(((double*)Ptr)+i) = Val.AggregateVal[i].DoubleVal;
1024 if (cast<VectorType>(Ty)->getElementType()->isFloatTy())
1025 *(((float*)Ptr)+i) = Val.AggregateVal[i].FloatVal;
1026 if (cast<VectorType>(Ty)->getElementType()->isIntegerTy()) {
1027 unsigned numOfBytes =(Val.AggregateVal[i].IntVal.getBitWidth()+7)/8;
1028 StoreIntToMemory(Val.AggregateVal[i].IntVal,
1029 (uint8_t*)Ptr + numOfBytes*i, numOfBytes);
1035 if (sys::IsLittleEndianHost != getDataLayout()->isLittleEndian())
1036 // Host and target are different endian - reverse the stored bytes.
1037 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
1040 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
1041 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
1042 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
1043 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
1044 uint8_t *Dst = reinterpret_cast<uint8_t *>(
1045 const_cast<uint64_t *>(IntVal.getRawData()));
1047 if (sys::IsLittleEndianHost)
1048 // Little-endian host - the destination must be ordered from LSB to MSB.
1049 // The source is ordered from LSB to MSB: Do a straight copy.
1050 memcpy(Dst, Src, LoadBytes);
1052 // Big-endian - the destination is an array of 64 bit words ordered from
1053 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
1054 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
1056 while (LoadBytes > sizeof(uint64_t)) {
1057 LoadBytes -= sizeof(uint64_t);
1058 // May not be aligned so use memcpy.
1059 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
1060 Dst += sizeof(uint64_t);
1063 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
1069 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
1072 const unsigned LoadBytes = getDataLayout()->getTypeStoreSize(Ty);
1074 switch (Ty->getTypeID()) {
1075 case Type::IntegerTyID:
1076 // An APInt with all words initially zero.
1077 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
1078 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
1080 case Type::FloatTyID:
1081 Result.FloatVal = *((float*)Ptr);
1083 case Type::DoubleTyID:
1084 Result.DoubleVal = *((double*)Ptr);
1086 case Type::PointerTyID:
1087 Result.PointerVal = *((PointerTy*)Ptr);
1089 case Type::X86_FP80TyID: {
1090 // This is endian dependent, but it will only work on x86 anyway.
1091 // FIXME: Will not trap if loading a signaling NaN.
1094 Result.IntVal = APInt(80, y);
1097 case Type::VectorTyID: {
1098 const VectorType *VT = cast<VectorType>(Ty);
1099 const Type *ElemT = VT->getElementType();
1100 const unsigned numElems = VT->getNumElements();
1101 if (ElemT->isFloatTy()) {
1102 Result.AggregateVal.resize(numElems);
1103 for (unsigned i = 0; i < numElems; ++i)
1104 Result.AggregateVal[i].FloatVal = *((float*)Ptr+i);
1106 if (ElemT->isDoubleTy()) {
1107 Result.AggregateVal.resize(numElems);
1108 for (unsigned i = 0; i < numElems; ++i)
1109 Result.AggregateVal[i].DoubleVal = *((double*)Ptr+i);
1111 if (ElemT->isIntegerTy()) {
1112 GenericValue intZero;
1113 const unsigned elemBitWidth = cast<IntegerType>(ElemT)->getBitWidth();
1114 intZero.IntVal = APInt(elemBitWidth, 0);
1115 Result.AggregateVal.resize(numElems, intZero);
1116 for (unsigned i = 0; i < numElems; ++i)
1117 LoadIntFromMemory(Result.AggregateVal[i].IntVal,
1118 (uint8_t*)Ptr+((elemBitWidth+7)/8)*i, (elemBitWidth+7)/8);
1123 SmallString<256> Msg;
1124 raw_svector_ostream OS(Msg);
1125 OS << "Cannot load value of type " << *Ty << "!";
1126 report_fatal_error(OS.str());
1130 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
1131 DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
1132 DEBUG(Init->dump());
1133 if (isa<UndefValue>(Init))
1136 if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
1137 unsigned ElementSize =
1138 getDataLayout()->getTypeAllocSize(CP->getType()->getElementType());
1139 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
1140 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
1144 if (isa<ConstantAggregateZero>(Init)) {
1145 memset(Addr, 0, (size_t)getDataLayout()->getTypeAllocSize(Init->getType()));
1149 if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
1150 unsigned ElementSize =
1151 getDataLayout()->getTypeAllocSize(CPA->getType()->getElementType());
1152 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
1153 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
1157 if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
1158 const StructLayout *SL =
1159 getDataLayout()->getStructLayout(cast<StructType>(CPS->getType()));
1160 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
1161 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
1165 if (const ConstantDataSequential *CDS =
1166 dyn_cast<ConstantDataSequential>(Init)) {
1167 // CDS is already laid out in host memory order.
1168 StringRef Data = CDS->getRawDataValues();
1169 memcpy(Addr, Data.data(), Data.size());
1173 if (Init->getType()->isFirstClassType()) {
1174 GenericValue Val = getConstantValue(Init);
1175 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
1179 DEBUG(dbgs() << "Bad Type: " << *Init->getType() << "\n");
1180 llvm_unreachable("Unknown constant type to initialize memory with!");
1183 /// EmitGlobals - Emit all of the global variables to memory, storing their
1184 /// addresses into GlobalAddress. This must make sure to copy the contents of
1185 /// their initializers into the memory.
1186 void ExecutionEngine::emitGlobals() {
1187 // Loop over all of the global variables in the program, allocating the memory
1188 // to hold them. If there is more than one module, do a prepass over globals
1189 // to figure out how the different modules should link together.
1190 std::map<std::pair<std::string, Type*>,
1191 const GlobalValue*> LinkedGlobalsMap;
1193 if (Modules.size() != 1) {
1194 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
1195 Module &M = *Modules[m];
1196 for (Module::const_global_iterator I = M.global_begin(),
1197 E = M.global_end(); I != E; ++I) {
1198 const GlobalValue *GV = I;
1199 if (GV->hasLocalLinkage() || GV->isDeclaration() ||
1200 GV->hasAppendingLinkage() || !GV->hasName())
1201 continue;// Ignore external globals and globals with internal linkage.
1203 const GlobalValue *&GVEntry =
1204 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1206 // If this is the first time we've seen this global, it is the canonical
1213 // If the existing global is strong, never replace it.
1214 if (GVEntry->hasExternalLinkage())
1217 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
1218 // symbol. FIXME is this right for common?
1219 if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
1225 std::vector<const GlobalValue*> NonCanonicalGlobals;
1226 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
1227 Module &M = *Modules[m];
1228 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
1230 // In the multi-module case, see what this global maps to.
1231 if (!LinkedGlobalsMap.empty()) {
1232 if (const GlobalValue *GVEntry =
1233 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())]) {
1234 // If something else is the canonical global, ignore this one.
1235 if (GVEntry != &*I) {
1236 NonCanonicalGlobals.push_back(I);
1242 if (!I->isDeclaration()) {
1243 addGlobalMapping(I, getMemoryForGV(I));
1245 // External variable reference. Try to use the dynamic loader to
1246 // get a pointer to it.
1248 sys::DynamicLibrary::SearchForAddressOfSymbol(I->getName()))
1249 addGlobalMapping(I, SymAddr);
1251 report_fatal_error("Could not resolve external global address: "
1257 // If there are multiple modules, map the non-canonical globals to their
1258 // canonical location.
1259 if (!NonCanonicalGlobals.empty()) {
1260 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
1261 const GlobalValue *GV = NonCanonicalGlobals[i];
1262 const GlobalValue *CGV =
1263 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1264 void *Ptr = getPointerToGlobalIfAvailable(CGV);
1265 assert(Ptr && "Canonical global wasn't codegen'd!");
1266 addGlobalMapping(GV, Ptr);
1270 // Now that all of the globals are set up in memory, loop through them all
1271 // and initialize their contents.
1272 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
1274 if (!I->isDeclaration()) {
1275 if (!LinkedGlobalsMap.empty()) {
1276 if (const GlobalValue *GVEntry =
1277 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())])
1278 if (GVEntry != &*I) // Not the canonical variable.
1281 EmitGlobalVariable(I);
1287 // EmitGlobalVariable - This method emits the specified global variable to the
1288 // address specified in GlobalAddresses, or allocates new memory if it's not
1289 // already in the map.
1290 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1291 void *GA = getPointerToGlobalIfAvailable(GV);
1294 // If it's not already specified, allocate memory for the global.
1295 GA = getMemoryForGV(GV);
1297 // If we failed to allocate memory for this global, return.
1298 if (GA == 0) return;
1300 addGlobalMapping(GV, GA);
1303 // Don't initialize if it's thread local, let the client do it.
1304 if (!GV->isThreadLocal())
1305 InitializeMemory(GV->getInitializer(), GA);
1307 Type *ElTy = GV->getType()->getElementType();
1308 size_t GVSize = (size_t)getDataLayout()->getTypeAllocSize(ElTy);
1309 NumInitBytes += (unsigned)GVSize;
1313 ExecutionEngineState::ExecutionEngineState(ExecutionEngine &EE)
1314 : EE(EE), GlobalAddressMap(this) {
1318 ExecutionEngineState::AddressMapConfig::getMutex(ExecutionEngineState *EES) {
1319 return &EES->EE.lock;
1322 void ExecutionEngineState::AddressMapConfig::onDelete(ExecutionEngineState *EES,
1323 const GlobalValue *Old) {
1324 void *OldVal = EES->GlobalAddressMap.lookup(Old);
1325 EES->GlobalAddressReverseMap.erase(OldVal);
1328 void ExecutionEngineState::AddressMapConfig::onRAUW(ExecutionEngineState *,
1329 const GlobalValue *,
1330 const GlobalValue *) {
1331 llvm_unreachable("The ExecutionEngine doesn't know how to handle a"
1332 " RAUW on a value it has a global mapping for.");