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"
18 #include "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/Module.h"
21 #include "llvm/ModuleProvider.h"
22 #include "llvm/ExecutionEngine/GenericValue.h"
23 #include "llvm/ADT/Statistic.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/MutexGuard.h"
27 #include "llvm/Support/ValueHandle.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/System/DynamicLibrary.h"
30 #include "llvm/System/Host.h"
31 #include "llvm/Target/TargetData.h"
36 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
37 STATISTIC(NumGlobals , "Number of global vars initialized");
39 ExecutionEngine *(*ExecutionEngine::JITCtor)(ModuleProvider *MP,
40 std::string *ErrorStr,
41 JITMemoryManager *JMM,
42 CodeGenOpt::Level OptLevel,
43 bool GVsWithCode) = 0;
44 ExecutionEngine *(*ExecutionEngine::InterpCtor)(ModuleProvider *MP,
45 std::string *ErrorStr) = 0;
46 ExecutionEngine::EERegisterFn ExecutionEngine::ExceptionTableRegister = 0;
49 ExecutionEngine::ExecutionEngine(ModuleProvider *P)
51 LazyFunctionCreator(0) {
52 CompilingLazily = false;
53 GVCompilationDisabled = false;
54 SymbolSearchingDisabled = false;
56 assert(P && "ModuleProvider is null?");
59 ExecutionEngine::~ExecutionEngine() {
60 clearAllGlobalMappings();
61 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
65 char* ExecutionEngine::getMemoryForGV(const GlobalVariable* GV) {
66 const Type *ElTy = GV->getType()->getElementType();
67 size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
68 return new char[GVSize];
71 /// removeModuleProvider - Remove a ModuleProvider from the list of modules.
72 /// Relases the Module from the ModuleProvider, materializing it in the
73 /// process, and returns the materialized Module.
74 Module* ExecutionEngine::removeModuleProvider(ModuleProvider *P,
75 std::string *ErrInfo) {
76 for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
77 E = Modules.end(); I != E; ++I) {
78 ModuleProvider *MP = *I;
81 clearGlobalMappingsFromModule(MP->getModule());
82 return MP->releaseModule(ErrInfo);
88 /// deleteModuleProvider - Remove a ModuleProvider from the list of modules,
89 /// and deletes the ModuleProvider and owned Module. Avoids materializing
90 /// the underlying module.
91 void ExecutionEngine::deleteModuleProvider(ModuleProvider *P,
92 std::string *ErrInfo) {
93 for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
94 E = Modules.end(); I != E; ++I) {
95 ModuleProvider *MP = *I;
98 clearGlobalMappingsFromModule(MP->getModule());
105 /// FindFunctionNamed - Search all of the active modules to find the one that
106 /// defines FnName. This is very slow operation and shouldn't be used for
108 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
109 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
110 if (Function *F = Modules[i]->getModule()->getFunction(FnName))
117 void *ExecutionEngineState::RemoveMapping(
118 const MutexGuard &, const GlobalValue *ToUnmap) {
119 GlobalAddressMapTy::iterator I = GlobalAddressMap.find(ToUnmap);
121 if (I == GlobalAddressMap.end())
125 GlobalAddressMap.erase(I);
128 GlobalAddressReverseMap.erase(OldVal);
132 /// addGlobalMapping - Tell the execution engine that the specified global is
133 /// at the specified location. This is used internally as functions are JIT'd
134 /// and as global variables are laid out in memory. It can and should also be
135 /// used by clients of the EE that want to have an LLVM global overlay
136 /// existing data in memory.
137 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
138 MutexGuard locked(lock);
140 DEBUG(errs() << "JIT: Map \'" << GV->getName()
141 << "\' to [" << Addr << "]\n";);
142 void *&CurVal = EEState.getGlobalAddressMap(locked)[GV];
143 assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
146 // If we are using the reverse mapping, add it too
147 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
148 AssertingVH<const GlobalValue> &V =
149 EEState.getGlobalAddressReverseMap(locked)[Addr];
150 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
155 /// clearAllGlobalMappings - Clear all global mappings and start over again
156 /// use in dynamic compilation scenarios when you want to move globals
157 void ExecutionEngine::clearAllGlobalMappings() {
158 MutexGuard locked(lock);
160 EEState.getGlobalAddressMap(locked).clear();
161 EEState.getGlobalAddressReverseMap(locked).clear();
164 /// clearGlobalMappingsFromModule - Clear all global mappings that came from a
165 /// particular module, because it has been removed from the JIT.
166 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
167 MutexGuard locked(lock);
169 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI) {
170 EEState.RemoveMapping(locked, FI);
172 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
174 EEState.RemoveMapping(locked, GI);
178 /// updateGlobalMapping - Replace an existing mapping for GV with a new
179 /// address. This updates both maps as required. If "Addr" is null, the
180 /// entry for the global is removed from the mappings.
181 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
182 MutexGuard locked(lock);
184 ExecutionEngineState::GlobalAddressMapTy &Map =
185 EEState.getGlobalAddressMap(locked);
187 // Deleting from the mapping?
189 return EEState.RemoveMapping(locked, GV);
192 void *&CurVal = Map[GV];
193 void *OldVal = CurVal;
195 if (CurVal && !EEState.getGlobalAddressReverseMap(locked).empty())
196 EEState.getGlobalAddressReverseMap(locked).erase(CurVal);
199 // If we are using the reverse mapping, add it too
200 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
201 AssertingVH<const GlobalValue> &V =
202 EEState.getGlobalAddressReverseMap(locked)[Addr];
203 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
209 /// getPointerToGlobalIfAvailable - This returns the address of the specified
210 /// global value if it is has already been codegen'd, otherwise it returns null.
212 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
213 MutexGuard locked(lock);
215 ExecutionEngineState::GlobalAddressMapTy::iterator I =
216 EEState.getGlobalAddressMap(locked).find(GV);
217 return I != EEState.getGlobalAddressMap(locked).end() ? I->second : 0;
220 /// getGlobalValueAtAddress - Return the LLVM global value object that starts
221 /// at the specified address.
223 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
224 MutexGuard locked(lock);
226 // If we haven't computed the reverse mapping yet, do so first.
227 if (EEState.getGlobalAddressReverseMap(locked).empty()) {
228 for (ExecutionEngineState::GlobalAddressMapTy::iterator
229 I = EEState.getGlobalAddressMap(locked).begin(),
230 E = EEState.getGlobalAddressMap(locked).end(); I != E; ++I)
231 EEState.getGlobalAddressReverseMap(locked).insert(std::make_pair(I->second,
235 std::map<void *, AssertingVH<const GlobalValue> >::iterator I =
236 EEState.getGlobalAddressReverseMap(locked).find(Addr);
237 return I != EEState.getGlobalAddressReverseMap(locked).end() ? I->second : 0;
240 // CreateArgv - Turn a vector of strings into a nice argv style array of
241 // pointers to null terminated strings.
243 static void *CreateArgv(LLVMContext &C, ExecutionEngine *EE,
244 const std::vector<std::string> &InputArgv) {
245 unsigned PtrSize = EE->getTargetData()->getPointerSize();
246 char *Result = new char[(InputArgv.size()+1)*PtrSize];
248 DEBUG(errs() << "JIT: ARGV = " << (void*)Result << "\n");
249 const Type *SBytePtr = Type::getInt8PtrTy(C);
251 for (unsigned i = 0; i != InputArgv.size(); ++i) {
252 unsigned Size = InputArgv[i].size()+1;
253 char *Dest = new char[Size];
254 DEBUG(errs() << "JIT: ARGV[" << i << "] = " << (void*)Dest << "\n");
256 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
259 // Endian safe: Result[i] = (PointerTy)Dest;
260 EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i*PtrSize),
265 EE->StoreValueToMemory(PTOGV(0),
266 (GenericValue*)(Result+InputArgv.size()*PtrSize),
272 /// runStaticConstructorsDestructors - This method is used to execute all of
273 /// the static constructors or destructors for a module, depending on the
274 /// value of isDtors.
275 void ExecutionEngine::runStaticConstructorsDestructors(Module *module,
277 const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
279 // Execute global ctors/dtors for each module in the program.
281 GlobalVariable *GV = module->getNamedGlobal(Name);
283 // If this global has internal linkage, or if it has a use, then it must be
284 // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
285 // this is the case, don't execute any of the global ctors, __main will do
287 if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
289 // Should be an array of '{ int, void ()* }' structs. The first value is
290 // the init priority, which we ignore.
291 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
292 if (!InitList) return;
293 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
294 if (ConstantStruct *CS =
295 dyn_cast<ConstantStruct>(InitList->getOperand(i))) {
296 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
298 Constant *FP = CS->getOperand(1);
299 if (FP->isNullValue())
300 break; // Found a null terminator, exit.
302 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
304 FP = CE->getOperand(0);
305 if (Function *F = dyn_cast<Function>(FP)) {
306 // Execute the ctor/dtor function!
307 runFunction(F, std::vector<GenericValue>());
312 /// runStaticConstructorsDestructors - This method is used to execute all of
313 /// the static constructors or destructors for a program, depending on the
314 /// value of isDtors.
315 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
316 // Execute global ctors/dtors for each module in the program.
317 for (unsigned m = 0, e = Modules.size(); m != e; ++m)
318 runStaticConstructorsDestructors(Modules[m]->getModule(), isDtors);
322 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
323 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
324 unsigned PtrSize = EE->getTargetData()->getPointerSize();
325 for (unsigned i = 0; i < PtrSize; ++i)
326 if (*(i + (uint8_t*)Loc))
332 /// runFunctionAsMain - This is a helper function which wraps runFunction to
333 /// handle the common task of starting up main with the specified argc, argv,
334 /// and envp parameters.
335 int ExecutionEngine::runFunctionAsMain(Function *Fn,
336 const std::vector<std::string> &argv,
337 const char * const * envp) {
338 std::vector<GenericValue> GVArgs;
340 GVArgc.IntVal = APInt(32, argv.size());
343 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
344 const FunctionType *FTy = Fn->getFunctionType();
345 const Type* PPInt8Ty =
346 PointerType::getUnqual(PointerType::getUnqual(
347 Type::getInt8Ty(Fn->getContext())));
350 if (FTy->getParamType(2) != PPInt8Ty) {
351 llvm_report_error("Invalid type for third argument of main() supplied");
355 if (FTy->getParamType(1) != PPInt8Ty) {
356 llvm_report_error("Invalid type for second argument of main() supplied");
360 if (FTy->getParamType(0) != Type::getInt32Ty(Fn->getContext())) {
361 llvm_report_error("Invalid type for first argument of main() supplied");
365 if (!isa<IntegerType>(FTy->getReturnType()) &&
366 FTy->getReturnType() != Type::getVoidTy(FTy->getContext())) {
367 llvm_report_error("Invalid return type of main() supplied");
371 llvm_report_error("Invalid number of arguments of main() supplied");
375 GVArgs.push_back(GVArgc); // Arg #0 = argc.
378 GVArgs.push_back(PTOGV(CreateArgv(Fn->getContext(), this, argv)));
379 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
380 "argv[0] was null after CreateArgv");
382 std::vector<std::string> EnvVars;
383 for (unsigned i = 0; envp[i]; ++i)
384 EnvVars.push_back(envp[i]);
386 GVArgs.push_back(PTOGV(CreateArgv(Fn->getContext(), this, EnvVars)));
390 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
393 /// If possible, create a JIT, unless the caller specifically requests an
394 /// Interpreter or there's an error. If even an Interpreter cannot be created,
395 /// NULL is returned.
397 ExecutionEngine *ExecutionEngine::create(ModuleProvider *MP,
398 bool ForceInterpreter,
399 std::string *ErrorStr,
400 CodeGenOpt::Level OptLevel,
402 return EngineBuilder(MP)
403 .setEngineKind(ForceInterpreter
404 ? EngineKind::Interpreter
406 .setErrorStr(ErrorStr)
407 .setOptLevel(OptLevel)
408 .setAllocateGVsWithCode(GVsWithCode)
412 ExecutionEngine *ExecutionEngine::create(Module *M) {
413 return EngineBuilder(M).create();
416 /// EngineBuilder - Overloaded constructor that automatically creates an
417 /// ExistingModuleProvider for an existing module.
418 EngineBuilder::EngineBuilder(Module *m) : MP(new ExistingModuleProvider(m)) {
422 ExecutionEngine *EngineBuilder::create() {
423 // Make sure we can resolve symbols in the program as well. The zero arg
424 // to the function tells DynamicLibrary to load the program, not a library.
425 if (sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr))
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) {
444 if (ExecutionEngine::JITCtor) {
445 ExecutionEngine *EE =
446 ExecutionEngine::JITCtor(MP, ErrorStr, JMM, OptLevel,
447 AllocateGVsWithCode);
452 // If we can't make a JIT and we didn't request one specifically, try making
453 // an interpreter instead.
454 if (WhichEngine & EngineKind::Interpreter) {
455 if (ExecutionEngine::InterpCtor)
456 return ExecutionEngine::InterpCtor(MP, ErrorStr);
458 *ErrorStr = "Interpreter has not been linked in.";
462 if ((WhichEngine & EngineKind::JIT) && ExecutionEngine::JITCtor == 0) {
464 *ErrorStr = "JIT has not been linked in.";
469 /// getPointerToGlobal - This returns the address of the specified global
470 /// value. This may involve code generation if it's a function.
472 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
473 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
474 return getPointerToFunction(F);
476 MutexGuard locked(lock);
477 void *p = EEState.getGlobalAddressMap(locked)[GV];
481 // Global variable might have been added since interpreter started.
482 if (GlobalVariable *GVar =
483 const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
484 EmitGlobalVariable(GVar);
486 llvm_unreachable("Global hasn't had an address allocated yet!");
487 return EEState.getGlobalAddressMap(locked)[GV];
490 /// This function converts a Constant* into a GenericValue. The interesting
491 /// part is if C is a ConstantExpr.
492 /// @brief Get a GenericValue for a Constant*
493 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
494 // If its undefined, return the garbage.
495 if (isa<UndefValue>(C))
496 return GenericValue();
498 // If the value is a ConstantExpr
499 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
500 Constant *Op0 = CE->getOperand(0);
501 switch (CE->getOpcode()) {
502 case Instruction::GetElementPtr: {
504 GenericValue Result = getConstantValue(Op0);
505 SmallVector<Value*, 8> Indices(CE->op_begin()+1, CE->op_end());
507 TD->getIndexedOffset(Op0->getType(), &Indices[0], Indices.size());
509 char* tmp = (char*) Result.PointerVal;
510 Result = PTOGV(tmp + Offset);
513 case Instruction::Trunc: {
514 GenericValue GV = getConstantValue(Op0);
515 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
516 GV.IntVal = GV.IntVal.trunc(BitWidth);
519 case Instruction::ZExt: {
520 GenericValue GV = getConstantValue(Op0);
521 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
522 GV.IntVal = GV.IntVal.zext(BitWidth);
525 case Instruction::SExt: {
526 GenericValue GV = getConstantValue(Op0);
527 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
528 GV.IntVal = GV.IntVal.sext(BitWidth);
531 case Instruction::FPTrunc: {
533 GenericValue GV = getConstantValue(Op0);
534 GV.FloatVal = float(GV.DoubleVal);
537 case Instruction::FPExt:{
539 GenericValue GV = getConstantValue(Op0);
540 GV.DoubleVal = double(GV.FloatVal);
543 case Instruction::UIToFP: {
544 GenericValue GV = getConstantValue(Op0);
545 if (CE->getType()->isFloatTy())
546 GV.FloatVal = float(GV.IntVal.roundToDouble());
547 else if (CE->getType()->isDoubleTy())
548 GV.DoubleVal = GV.IntVal.roundToDouble();
549 else if (CE->getType()->isX86_FP80Ty()) {
550 const uint64_t zero[] = {0, 0};
551 APFloat apf = APFloat(APInt(80, 2, zero));
552 (void)apf.convertFromAPInt(GV.IntVal,
554 APFloat::rmNearestTiesToEven);
555 GV.IntVal = apf.bitcastToAPInt();
559 case Instruction::SIToFP: {
560 GenericValue GV = getConstantValue(Op0);
561 if (CE->getType()->isFloatTy())
562 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
563 else if (CE->getType()->isDoubleTy())
564 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
565 else if (CE->getType()->isX86_FP80Ty()) {
566 const uint64_t zero[] = { 0, 0};
567 APFloat apf = APFloat(APInt(80, 2, zero));
568 (void)apf.convertFromAPInt(GV.IntVal,
570 APFloat::rmNearestTiesToEven);
571 GV.IntVal = apf.bitcastToAPInt();
575 case Instruction::FPToUI: // double->APInt conversion handles sign
576 case Instruction::FPToSI: {
577 GenericValue GV = getConstantValue(Op0);
578 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
579 if (Op0->getType()->isFloatTy())
580 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
581 else if (Op0->getType()->isDoubleTy())
582 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
583 else if (Op0->getType()->isX86_FP80Ty()) {
584 APFloat apf = APFloat(GV.IntVal);
587 (void)apf.convertToInteger(&v, BitWidth,
588 CE->getOpcode()==Instruction::FPToSI,
589 APFloat::rmTowardZero, &ignored);
590 GV.IntVal = v; // endian?
594 case Instruction::PtrToInt: {
595 GenericValue GV = getConstantValue(Op0);
596 uint32_t PtrWidth = TD->getPointerSizeInBits();
597 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
600 case Instruction::IntToPtr: {
601 GenericValue GV = getConstantValue(Op0);
602 uint32_t PtrWidth = TD->getPointerSizeInBits();
603 if (PtrWidth != GV.IntVal.getBitWidth())
604 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
605 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
606 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
609 case Instruction::BitCast: {
610 GenericValue GV = getConstantValue(Op0);
611 const Type* DestTy = CE->getType();
612 switch (Op0->getType()->getTypeID()) {
613 default: llvm_unreachable("Invalid bitcast operand");
614 case Type::IntegerTyID:
615 assert(DestTy->isFloatingPoint() && "invalid bitcast");
616 if (DestTy->isFloatTy())
617 GV.FloatVal = GV.IntVal.bitsToFloat();
618 else if (DestTy->isDoubleTy())
619 GV.DoubleVal = GV.IntVal.bitsToDouble();
621 case Type::FloatTyID:
622 assert(DestTy == Type::getInt32Ty(DestTy->getContext()) &&
624 GV.IntVal.floatToBits(GV.FloatVal);
626 case Type::DoubleTyID:
627 assert(DestTy == Type::getInt64Ty(DestTy->getContext()) &&
629 GV.IntVal.doubleToBits(GV.DoubleVal);
631 case Type::PointerTyID:
632 assert(isa<PointerType>(DestTy) && "Invalid bitcast");
633 break; // getConstantValue(Op0) above already converted it
637 case Instruction::Add:
638 case Instruction::FAdd:
639 case Instruction::Sub:
640 case Instruction::FSub:
641 case Instruction::Mul:
642 case Instruction::FMul:
643 case Instruction::UDiv:
644 case Instruction::SDiv:
645 case Instruction::URem:
646 case Instruction::SRem:
647 case Instruction::And:
648 case Instruction::Or:
649 case Instruction::Xor: {
650 GenericValue LHS = getConstantValue(Op0);
651 GenericValue RHS = getConstantValue(CE->getOperand(1));
653 switch (CE->getOperand(0)->getType()->getTypeID()) {
654 default: llvm_unreachable("Bad add type!");
655 case Type::IntegerTyID:
656 switch (CE->getOpcode()) {
657 default: llvm_unreachable("Invalid integer opcode");
658 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
659 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
660 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
661 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
662 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
663 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
664 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
665 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
666 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
667 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
670 case Type::FloatTyID:
671 switch (CE->getOpcode()) {
672 default: llvm_unreachable("Invalid float opcode");
673 case Instruction::FAdd:
674 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
675 case Instruction::FSub:
676 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
677 case Instruction::FMul:
678 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
679 case Instruction::FDiv:
680 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
681 case Instruction::FRem:
682 GV.FloatVal = ::fmodf(LHS.FloatVal,RHS.FloatVal); break;
685 case Type::DoubleTyID:
686 switch (CE->getOpcode()) {
687 default: llvm_unreachable("Invalid double opcode");
688 case Instruction::FAdd:
689 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
690 case Instruction::FSub:
691 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
692 case Instruction::FMul:
693 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
694 case Instruction::FDiv:
695 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
696 case Instruction::FRem:
697 GV.DoubleVal = ::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
700 case Type::X86_FP80TyID:
701 case Type::PPC_FP128TyID:
702 case Type::FP128TyID: {
703 APFloat apfLHS = APFloat(LHS.IntVal);
704 switch (CE->getOpcode()) {
705 default: llvm_unreachable("Invalid long double opcode");llvm_unreachable(0);
706 case Instruction::FAdd:
707 apfLHS.add(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
708 GV.IntVal = apfLHS.bitcastToAPInt();
710 case Instruction::FSub:
711 apfLHS.subtract(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
712 GV.IntVal = apfLHS.bitcastToAPInt();
714 case Instruction::FMul:
715 apfLHS.multiply(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
716 GV.IntVal = apfLHS.bitcastToAPInt();
718 case Instruction::FDiv:
719 apfLHS.divide(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
720 GV.IntVal = apfLHS.bitcastToAPInt();
722 case Instruction::FRem:
723 apfLHS.mod(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
724 GV.IntVal = apfLHS.bitcastToAPInt();
736 raw_string_ostream Msg(msg);
737 Msg << "ConstantExpr not handled: " << *CE;
738 llvm_report_error(Msg.str());
742 switch (C->getType()->getTypeID()) {
743 case Type::FloatTyID:
744 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
746 case Type::DoubleTyID:
747 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
749 case Type::X86_FP80TyID:
750 case Type::FP128TyID:
751 case Type::PPC_FP128TyID:
752 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
754 case Type::IntegerTyID:
755 Result.IntVal = cast<ConstantInt>(C)->getValue();
757 case Type::PointerTyID:
758 if (isa<ConstantPointerNull>(C))
759 Result.PointerVal = 0;
760 else if (const Function *F = dyn_cast<Function>(C))
761 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
762 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
763 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
764 else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C))
765 Result = PTOGV(getPointerToBasicBlock(const_cast<BasicBlock*>(
766 BA->getBasicBlock())));
768 llvm_unreachable("Unknown constant pointer type!");
772 raw_string_ostream Msg(msg);
773 Msg << "ERROR: Constant unimplemented for type: " << *C->getType();
774 llvm_report_error(Msg.str());
779 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
780 /// with the integer held in IntVal.
781 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
782 unsigned StoreBytes) {
783 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
784 uint8_t *Src = (uint8_t *)IntVal.getRawData();
786 if (sys::isLittleEndianHost())
787 // Little-endian host - the source is ordered from LSB to MSB. Order the
788 // destination from LSB to MSB: Do a straight copy.
789 memcpy(Dst, Src, StoreBytes);
791 // Big-endian host - the source is an array of 64 bit words ordered from
792 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
793 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
794 while (StoreBytes > sizeof(uint64_t)) {
795 StoreBytes -= sizeof(uint64_t);
796 // May not be aligned so use memcpy.
797 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
798 Src += sizeof(uint64_t);
801 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
805 /// StoreValueToMemory - Stores the data in Val of type Ty at address Ptr. Ptr
806 /// is the address of the memory at which to store Val, cast to GenericValue *.
807 /// It is not a pointer to a GenericValue containing the address at which to
809 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
810 GenericValue *Ptr, const Type *Ty) {
811 const unsigned StoreBytes = getTargetData()->getTypeStoreSize(Ty);
813 switch (Ty->getTypeID()) {
814 case Type::IntegerTyID:
815 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
817 case Type::FloatTyID:
818 *((float*)Ptr) = Val.FloatVal;
820 case Type::DoubleTyID:
821 *((double*)Ptr) = Val.DoubleVal;
823 case Type::X86_FP80TyID:
824 memcpy(Ptr, Val.IntVal.getRawData(), 10);
826 case Type::PointerTyID:
827 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
828 if (StoreBytes != sizeof(PointerTy))
829 memset(Ptr, 0, StoreBytes);
831 *((PointerTy*)Ptr) = Val.PointerVal;
834 errs() << "Cannot store value of type " << *Ty << "!\n";
837 if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian())
838 // Host and target are different endian - reverse the stored bytes.
839 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
842 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
843 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
844 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
845 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
846 uint8_t *Dst = (uint8_t *)IntVal.getRawData();
848 if (sys::isLittleEndianHost())
849 // Little-endian host - the destination must be ordered from LSB to MSB.
850 // The source is ordered from LSB to MSB: Do a straight copy.
851 memcpy(Dst, Src, LoadBytes);
853 // Big-endian - the destination is an array of 64 bit words ordered from
854 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
855 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
857 while (LoadBytes > sizeof(uint64_t)) {
858 LoadBytes -= sizeof(uint64_t);
859 // May not be aligned so use memcpy.
860 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
861 Dst += sizeof(uint64_t);
864 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
870 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
873 const unsigned LoadBytes = getTargetData()->getTypeStoreSize(Ty);
875 switch (Ty->getTypeID()) {
876 case Type::IntegerTyID:
877 // An APInt with all words initially zero.
878 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
879 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
881 case Type::FloatTyID:
882 Result.FloatVal = *((float*)Ptr);
884 case Type::DoubleTyID:
885 Result.DoubleVal = *((double*)Ptr);
887 case Type::PointerTyID:
888 Result.PointerVal = *((PointerTy*)Ptr);
890 case Type::X86_FP80TyID: {
891 // This is endian dependent, but it will only work on x86 anyway.
892 // FIXME: Will not trap if loading a signaling NaN.
895 Result.IntVal = APInt(80, 2, y);
900 raw_string_ostream Msg(msg);
901 Msg << "Cannot load value of type " << *Ty << "!";
902 llvm_report_error(Msg.str());
906 // InitializeMemory - Recursive function to apply a Constant value into the
907 // specified memory location...
909 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
910 DEBUG(errs() << "JIT: Initializing " << Addr << " ");
912 if (isa<UndefValue>(Init)) {
914 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
915 unsigned ElementSize =
916 getTargetData()->getTypeAllocSize(CP->getType()->getElementType());
917 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
918 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
920 } else if (isa<ConstantAggregateZero>(Init)) {
921 memset(Addr, 0, (size_t)getTargetData()->getTypeAllocSize(Init->getType()));
923 } else if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
924 unsigned ElementSize =
925 getTargetData()->getTypeAllocSize(CPA->getType()->getElementType());
926 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
927 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
929 } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
930 const StructLayout *SL =
931 getTargetData()->getStructLayout(cast<StructType>(CPS->getType()));
932 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
933 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
935 } else if (Init->getType()->isFirstClassType()) {
936 GenericValue Val = getConstantValue(Init);
937 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
941 errs() << "Bad Type: " << *Init->getType() << "\n";
942 llvm_unreachable("Unknown constant type to initialize memory with!");
945 /// EmitGlobals - Emit all of the global variables to memory, storing their
946 /// addresses into GlobalAddress. This must make sure to copy the contents of
947 /// their initializers into the memory.
949 void ExecutionEngine::emitGlobals() {
951 // Loop over all of the global variables in the program, allocating the memory
952 // to hold them. If there is more than one module, do a prepass over globals
953 // to figure out how the different modules should link together.
955 std::map<std::pair<std::string, const Type*>,
956 const GlobalValue*> LinkedGlobalsMap;
958 if (Modules.size() != 1) {
959 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
960 Module &M = *Modules[m]->getModule();
961 for (Module::const_global_iterator I = M.global_begin(),
962 E = M.global_end(); I != E; ++I) {
963 const GlobalValue *GV = I;
964 if (GV->hasLocalLinkage() || GV->isDeclaration() ||
965 GV->hasAppendingLinkage() || !GV->hasName())
966 continue;// Ignore external globals and globals with internal linkage.
968 const GlobalValue *&GVEntry =
969 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
971 // If this is the first time we've seen this global, it is the canonical
978 // If the existing global is strong, never replace it.
979 if (GVEntry->hasExternalLinkage() ||
980 GVEntry->hasDLLImportLinkage() ||
981 GVEntry->hasDLLExportLinkage())
984 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
985 // symbol. FIXME is this right for common?
986 if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
992 std::vector<const GlobalValue*> NonCanonicalGlobals;
993 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
994 Module &M = *Modules[m]->getModule();
995 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
997 // In the multi-module case, see what this global maps to.
998 if (!LinkedGlobalsMap.empty()) {
999 if (const GlobalValue *GVEntry =
1000 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())]) {
1001 // If something else is the canonical global, ignore this one.
1002 if (GVEntry != &*I) {
1003 NonCanonicalGlobals.push_back(I);
1009 if (!I->isDeclaration()) {
1010 addGlobalMapping(I, getMemoryForGV(I));
1012 // External variable reference. Try to use the dynamic loader to
1013 // get a pointer to it.
1015 sys::DynamicLibrary::SearchForAddressOfSymbol(I->getName()))
1016 addGlobalMapping(I, SymAddr);
1018 llvm_report_error("Could not resolve external global address: "
1024 // If there are multiple modules, map the non-canonical globals to their
1025 // canonical location.
1026 if (!NonCanonicalGlobals.empty()) {
1027 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
1028 const GlobalValue *GV = NonCanonicalGlobals[i];
1029 const GlobalValue *CGV =
1030 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1031 void *Ptr = getPointerToGlobalIfAvailable(CGV);
1032 assert(Ptr && "Canonical global wasn't codegen'd!");
1033 addGlobalMapping(GV, Ptr);
1037 // Now that all of the globals are set up in memory, loop through them all
1038 // and initialize their contents.
1039 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
1041 if (!I->isDeclaration()) {
1042 if (!LinkedGlobalsMap.empty()) {
1043 if (const GlobalValue *GVEntry =
1044 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())])
1045 if (GVEntry != &*I) // Not the canonical variable.
1048 EmitGlobalVariable(I);
1054 // EmitGlobalVariable - This method emits the specified global variable to the
1055 // address specified in GlobalAddresses, or allocates new memory if it's not
1056 // already in the map.
1057 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1058 void *GA = getPointerToGlobalIfAvailable(GV);
1061 // If it's not already specified, allocate memory for the global.
1062 GA = getMemoryForGV(GV);
1063 addGlobalMapping(GV, GA);
1066 // Don't initialize if it's thread local, let the client do it.
1067 if (!GV->isThreadLocal())
1068 InitializeMemory(GV->getInitializer(), GA);
1070 const Type *ElTy = GV->getType()->getElementType();
1071 size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
1072 NumInitBytes += (unsigned)GVSize;
1076 ExecutionEngineState::ExecutionEngineState(ExecutionEngine &EE)
1077 : EE(EE), GlobalAddressMap(this) {
1080 sys::Mutex *ExecutionEngineState::AddressMapConfig::getMutex(
1081 ExecutionEngineState *EES) {
1082 return &EES->EE.lock;
1084 void ExecutionEngineState::AddressMapConfig::onDelete(
1085 ExecutionEngineState *EES, const GlobalValue *Old) {
1086 void *OldVal = EES->GlobalAddressMap.lookup(Old);
1087 EES->GlobalAddressReverseMap.erase(OldVal);
1090 void ExecutionEngineState::AddressMapConfig::onRAUW(
1091 ExecutionEngineState *, const GlobalValue *, const GlobalValue *) {
1092 assert(false && "The ExecutionEngine doesn't know how to handle a"
1093 " RAUW on a value it has a global mapping for.");