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/ExecutionEngine/GenericValue.h"
22 #include "llvm/ADT/SmallString.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/Support/DynamicLibrary.h"
30 #include "llvm/Support/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)(
41 std::string *ErrorStr,
42 JITMemoryManager *JMM,
43 CodeGenOpt::Level OptLevel,
48 const SmallVectorImpl<std::string>& MAttrs) = 0;
49 ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
51 std::string *ErrorStr,
52 JITMemoryManager *JMM,
53 CodeGenOpt::Level OptLevel,
58 const SmallVectorImpl<std::string>& MAttrs) = 0;
59 ExecutionEngine *(*ExecutionEngine::InterpCtor)(Module *M,
60 std::string *ErrorStr) = 0;
62 ExecutionEngine::ExecutionEngine(Module *M)
64 LazyFunctionCreator(0),
65 ExceptionTableRegister(0),
66 ExceptionTableDeregister(0) {
67 CompilingLazily = false;
68 GVCompilationDisabled = false;
69 SymbolSearchingDisabled = false;
71 assert(M && "Module is null?");
74 ExecutionEngine::~ExecutionEngine() {
75 clearAllGlobalMappings();
76 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
80 void ExecutionEngine::DeregisterAllTables() {
81 if (ExceptionTableDeregister) {
82 DenseMap<const Function*, void*>::iterator it = AllExceptionTables.begin();
83 DenseMap<const Function*, void*>::iterator ite = AllExceptionTables.end();
84 for (; it != ite; ++it)
85 ExceptionTableDeregister(it->second);
86 AllExceptionTables.clear();
91 /// \brief Helper class which uses a value handler to automatically deletes the
92 /// memory block when the GlobalVariable is destroyed.
93 class GVMemoryBlock : public CallbackVH {
94 GVMemoryBlock(const GlobalVariable *GV)
95 : CallbackVH(const_cast<GlobalVariable*>(GV)) {}
98 /// \brief Returns the address the GlobalVariable should be written into. The
99 /// GVMemoryBlock object prefixes that.
100 static char *Create(const GlobalVariable *GV, const TargetData& TD) {
101 const Type *ElTy = GV->getType()->getElementType();
102 size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
103 void *RawMemory = ::operator new(
104 TargetData::RoundUpAlignment(sizeof(GVMemoryBlock),
105 TD.getPreferredAlignment(GV))
107 new(RawMemory) GVMemoryBlock(GV);
108 return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
111 virtual void deleted() {
112 // We allocated with operator new and with some extra memory hanging off the
113 // end, so don't just delete this. I'm not sure if this is actually
115 this->~GVMemoryBlock();
116 ::operator delete(this);
119 } // anonymous namespace
121 char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
122 return GVMemoryBlock::Create(GV, *getTargetData());
125 bool ExecutionEngine::removeModule(Module *M) {
126 for(SmallVector<Module *, 1>::iterator I = Modules.begin(),
127 E = Modules.end(); I != E; ++I) {
131 clearGlobalMappingsFromModule(M);
138 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
139 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
140 if (Function *F = Modules[i]->getFunction(FnName))
147 void *ExecutionEngineState::RemoveMapping(const MutexGuard &,
148 const GlobalValue *ToUnmap) {
149 GlobalAddressMapTy::iterator I = GlobalAddressMap.find(ToUnmap);
152 // FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
154 if (I == GlobalAddressMap.end())
158 GlobalAddressMap.erase(I);
161 GlobalAddressReverseMap.erase(OldVal);
165 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
166 MutexGuard locked(lock);
168 DEBUG(dbgs() << "JIT: Map \'" << GV->getName()
169 << "\' to [" << Addr << "]\n";);
170 void *&CurVal = EEState.getGlobalAddressMap(locked)[GV];
171 assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
174 // If we are using the reverse mapping, add it too.
175 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
176 AssertingVH<const GlobalValue> &V =
177 EEState.getGlobalAddressReverseMap(locked)[Addr];
178 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
183 void ExecutionEngine::clearAllGlobalMappings() {
184 MutexGuard locked(lock);
186 EEState.getGlobalAddressMap(locked).clear();
187 EEState.getGlobalAddressReverseMap(locked).clear();
190 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
191 MutexGuard locked(lock);
193 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
194 EEState.RemoveMapping(locked, FI);
195 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
197 EEState.RemoveMapping(locked, GI);
200 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
201 MutexGuard locked(lock);
203 ExecutionEngineState::GlobalAddressMapTy &Map =
204 EEState.getGlobalAddressMap(locked);
206 // Deleting from the mapping?
208 return EEState.RemoveMapping(locked, GV);
210 void *&CurVal = Map[GV];
211 void *OldVal = CurVal;
213 if (CurVal && !EEState.getGlobalAddressReverseMap(locked).empty())
214 EEState.getGlobalAddressReverseMap(locked).erase(CurVal);
217 // If we are using the reverse mapping, add it too.
218 if (!EEState.getGlobalAddressReverseMap(locked).empty()) {
219 AssertingVH<const GlobalValue> &V =
220 EEState.getGlobalAddressReverseMap(locked)[Addr];
221 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
227 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
228 MutexGuard locked(lock);
230 ExecutionEngineState::GlobalAddressMapTy::iterator I =
231 EEState.getGlobalAddressMap(locked).find(GV);
232 return I != EEState.getGlobalAddressMap(locked).end() ? I->second : 0;
235 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
236 MutexGuard locked(lock);
238 // If we haven't computed the reverse mapping yet, do so first.
239 if (EEState.getGlobalAddressReverseMap(locked).empty()) {
240 for (ExecutionEngineState::GlobalAddressMapTy::iterator
241 I = EEState.getGlobalAddressMap(locked).begin(),
242 E = EEState.getGlobalAddressMap(locked).end(); I != E; ++I)
243 EEState.getGlobalAddressReverseMap(locked).insert(std::make_pair(
244 I->second, I->first));
247 std::map<void *, AssertingVH<const GlobalValue> >::iterator I =
248 EEState.getGlobalAddressReverseMap(locked).find(Addr);
249 return I != EEState.getGlobalAddressReverseMap(locked).end() ? I->second : 0;
255 std::vector<char*> Values;
257 ArgvArray() : Array(NULL) {}
258 ~ArgvArray() { clear(); }
262 for (size_t I = 0, E = Values.size(); I != E; ++I) {
267 /// Turn a vector of strings into a nice argv style array of pointers to null
268 /// terminated strings.
269 void *reset(LLVMContext &C, ExecutionEngine *EE,
270 const std::vector<std::string> &InputArgv);
272 } // anonymous namespace
273 void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
274 const std::vector<std::string> &InputArgv) {
275 clear(); // Free the old contents.
276 unsigned PtrSize = EE->getTargetData()->getPointerSize();
277 Array = new char[(InputArgv.size()+1)*PtrSize];
279 DEBUG(dbgs() << "JIT: ARGV = " << (void*)Array << "\n");
280 const Type *SBytePtr = Type::getInt8PtrTy(C);
282 for (unsigned i = 0; i != InputArgv.size(); ++i) {
283 unsigned Size = InputArgv[i].size()+1;
284 char *Dest = new char[Size];
285 Values.push_back(Dest);
286 DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void*)Dest << "\n");
288 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
291 // Endian safe: Array[i] = (PointerTy)Dest;
292 EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Array+i*PtrSize),
297 EE->StoreValueToMemory(PTOGV(0),
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 = cast<ConstantArray>(GV->getInitializer());
317 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
318 ConstantStruct *CS = cast<ConstantStruct>(InitList->getOperand(i));
320 Constant *FP = CS->getOperand(1);
321 if (FP->isNullValue())
322 break; // Found a null terminator, exit.
324 // Strip off constant expression casts.
325 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
327 FP = CE->getOperand(0);
329 // Execute the ctor/dtor function!
330 if (Function *F = dyn_cast<Function>(FP))
331 runFunction(F, std::vector<GenericValue>());
333 // FIXME: It is marginally lame that we just do nothing here if we see an
334 // entry we don't recognize. It might not be unreasonable for the verifier
335 // to not even allow this and just assert here.
339 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
340 // Execute global ctors/dtors for each module in the program.
341 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
342 runStaticConstructorsDestructors(Modules[i], isDtors);
346 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
347 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
348 unsigned PtrSize = EE->getTargetData()->getPointerSize();
349 for (unsigned i = 0; i < PtrSize; ++i)
350 if (*(i + (uint8_t*)Loc))
356 int ExecutionEngine::runFunctionAsMain(Function *Fn,
357 const std::vector<std::string> &argv,
358 const char * const * envp) {
359 std::vector<GenericValue> GVArgs;
361 GVArgc.IntVal = APInt(32, argv.size());
364 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
365 const FunctionType *FTy = Fn->getFunctionType();
366 const Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
368 // Check the argument types.
370 report_fatal_error("Invalid number of arguments of main() supplied");
371 if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
372 report_fatal_error("Invalid type for third argument of main() supplied");
373 if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
374 report_fatal_error("Invalid type for second argument of main() supplied");
375 if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
376 report_fatal_error("Invalid type for first argument of main() supplied");
377 if (!FTy->getReturnType()->isIntegerTy() &&
378 !FTy->getReturnType()->isVoidTy())
379 report_fatal_error("Invalid return type of main() supplied");
384 GVArgs.push_back(GVArgc); // Arg #0 = argc.
387 GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
388 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
389 "argv[0] was null after CreateArgv");
391 std::vector<std::string> EnvVars;
392 for (unsigned i = 0; envp[i]; ++i)
393 EnvVars.push_back(envp[i]);
395 GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
400 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
403 ExecutionEngine *ExecutionEngine::create(Module *M,
404 bool ForceInterpreter,
405 std::string *ErrorStr,
406 CodeGenOpt::Level OptLevel,
408 return EngineBuilder(M)
409 .setEngineKind(ForceInterpreter
410 ? EngineKind::Interpreter
412 .setErrorStr(ErrorStr)
413 .setOptLevel(OptLevel)
414 .setAllocateGVsWithCode(GVsWithCode)
418 ExecutionEngine *EngineBuilder::create() {
419 // Make sure we can resolve symbols in the program as well. The zero arg
420 // to the function tells DynamicLibrary to load the program, not a library.
421 if (sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr))
424 // If the user specified a memory manager but didn't specify which engine to
425 // create, we assume they only want the JIT, and we fail if they only want
428 if (WhichEngine & EngineKind::JIT)
429 WhichEngine = EngineKind::JIT;
432 *ErrorStr = "Cannot create an interpreter with a memory manager.";
437 // Unless the interpreter was explicitly selected or the JIT is not linked,
439 if (WhichEngine & EngineKind::JIT) {
440 if (UseMCJIT && ExecutionEngine::MCJITCtor) {
441 ExecutionEngine *EE =
442 ExecutionEngine::MCJITCtor(M, ErrorStr, JMM, OptLevel,
443 AllocateGVsWithCode, CMModel,
444 MArch, MCPU, MAttrs);
446 } else if (ExecutionEngine::JITCtor) {
447 ExecutionEngine *EE =
448 ExecutionEngine::JITCtor(M, ErrorStr, JMM, OptLevel,
449 AllocateGVsWithCode, CMModel,
450 MArch, MCPU, MAttrs);
455 // If we can't make a JIT and we didn't request one specifically, try making
456 // an interpreter instead.
457 if (WhichEngine & EngineKind::Interpreter) {
458 if (ExecutionEngine::InterpCtor)
459 return ExecutionEngine::InterpCtor(M, ErrorStr);
461 *ErrorStr = "Interpreter has not been linked in.";
465 if ((WhichEngine & EngineKind::JIT) && ExecutionEngine::JITCtor == 0) {
467 *ErrorStr = "JIT has not been linked in.";
473 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
474 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
475 return getPointerToFunction(F);
477 MutexGuard locked(lock);
478 if (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!");
488 return EEState.getGlobalAddressMap(locked)[GV];
491 /// \brief Converts a Constant* into a GenericValue, including handling of
492 /// ConstantExpr values.
493 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
494 // If its undefined, return the garbage.
495 if (isa<UndefValue>(C)) {
497 switch (C->getType()->getTypeID()) {
498 case Type::IntegerTyID:
499 case Type::X86_FP80TyID:
500 case Type::FP128TyID:
501 case Type::PPC_FP128TyID:
502 // Although the value is undefined, we still have to construct an APInt
503 // with the correct bit width.
504 Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
512 // Otherwise, if the value is a ConstantExpr...
513 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
514 Constant *Op0 = CE->getOperand(0);
515 switch (CE->getOpcode()) {
516 case Instruction::GetElementPtr: {
518 GenericValue Result = getConstantValue(Op0);
519 SmallVector<Value*, 8> Indices(CE->op_begin()+1, CE->op_end());
521 TD->getIndexedOffset(Op0->getType(), &Indices[0], Indices.size());
523 char* tmp = (char*) Result.PointerVal;
524 Result = PTOGV(tmp + Offset);
527 case Instruction::Trunc: {
528 GenericValue GV = getConstantValue(Op0);
529 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
530 GV.IntVal = GV.IntVal.trunc(BitWidth);
533 case Instruction::ZExt: {
534 GenericValue GV = getConstantValue(Op0);
535 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
536 GV.IntVal = GV.IntVal.zext(BitWidth);
539 case Instruction::SExt: {
540 GenericValue GV = getConstantValue(Op0);
541 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
542 GV.IntVal = GV.IntVal.sext(BitWidth);
545 case Instruction::FPTrunc: {
547 GenericValue GV = getConstantValue(Op0);
548 GV.FloatVal = float(GV.DoubleVal);
551 case Instruction::FPExt:{
553 GenericValue GV = getConstantValue(Op0);
554 GV.DoubleVal = double(GV.FloatVal);
557 case Instruction::UIToFP: {
558 GenericValue GV = getConstantValue(Op0);
559 if (CE->getType()->isFloatTy())
560 GV.FloatVal = float(GV.IntVal.roundToDouble());
561 else if (CE->getType()->isDoubleTy())
562 GV.DoubleVal = GV.IntVal.roundToDouble();
563 else if (CE->getType()->isX86_FP80Ty()) {
564 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
565 (void)apf.convertFromAPInt(GV.IntVal,
567 APFloat::rmNearestTiesToEven);
568 GV.IntVal = apf.bitcastToAPInt();
572 case Instruction::SIToFP: {
573 GenericValue GV = getConstantValue(Op0);
574 if (CE->getType()->isFloatTy())
575 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
576 else if (CE->getType()->isDoubleTy())
577 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
578 else if (CE->getType()->isX86_FP80Ty()) {
579 APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
580 (void)apf.convertFromAPInt(GV.IntVal,
582 APFloat::rmNearestTiesToEven);
583 GV.IntVal = apf.bitcastToAPInt();
587 case Instruction::FPToUI: // double->APInt conversion handles sign
588 case Instruction::FPToSI: {
589 GenericValue GV = getConstantValue(Op0);
590 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
591 if (Op0->getType()->isFloatTy())
592 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
593 else if (Op0->getType()->isDoubleTy())
594 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
595 else if (Op0->getType()->isX86_FP80Ty()) {
596 APFloat apf = APFloat(GV.IntVal);
599 (void)apf.convertToInteger(&v, BitWidth,
600 CE->getOpcode()==Instruction::FPToSI,
601 APFloat::rmTowardZero, &ignored);
602 GV.IntVal = v; // endian?
606 case Instruction::PtrToInt: {
607 GenericValue GV = getConstantValue(Op0);
608 uint32_t PtrWidth = TD->getPointerSizeInBits();
609 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
612 case Instruction::IntToPtr: {
613 GenericValue GV = getConstantValue(Op0);
614 uint32_t PtrWidth = TD->getPointerSizeInBits();
615 if (PtrWidth != GV.IntVal.getBitWidth())
616 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
617 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
618 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
621 case Instruction::BitCast: {
622 GenericValue GV = getConstantValue(Op0);
623 const Type* DestTy = CE->getType();
624 switch (Op0->getType()->getTypeID()) {
625 default: llvm_unreachable("Invalid bitcast operand");
626 case Type::IntegerTyID:
627 assert(DestTy->isFloatingPointTy() && "invalid bitcast");
628 if (DestTy->isFloatTy())
629 GV.FloatVal = GV.IntVal.bitsToFloat();
630 else if (DestTy->isDoubleTy())
631 GV.DoubleVal = GV.IntVal.bitsToDouble();
633 case Type::FloatTyID:
634 assert(DestTy->isIntegerTy(32) && "Invalid bitcast");
635 GV.IntVal = APInt::floatToBits(GV.FloatVal);
637 case Type::DoubleTyID:
638 assert(DestTy->isIntegerTy(64) && "Invalid bitcast");
639 GV.IntVal = APInt::doubleToBits(GV.DoubleVal);
641 case Type::PointerTyID:
642 assert(DestTy->isPointerTy() && "Invalid bitcast");
643 break; // getConstantValue(Op0) above already converted it
647 case Instruction::Add:
648 case Instruction::FAdd:
649 case Instruction::Sub:
650 case Instruction::FSub:
651 case Instruction::Mul:
652 case Instruction::FMul:
653 case Instruction::UDiv:
654 case Instruction::SDiv:
655 case Instruction::URem:
656 case Instruction::SRem:
657 case Instruction::And:
658 case Instruction::Or:
659 case Instruction::Xor: {
660 GenericValue LHS = getConstantValue(Op0);
661 GenericValue RHS = getConstantValue(CE->getOperand(1));
663 switch (CE->getOperand(0)->getType()->getTypeID()) {
664 default: llvm_unreachable("Bad add type!");
665 case Type::IntegerTyID:
666 switch (CE->getOpcode()) {
667 default: llvm_unreachable("Invalid integer opcode");
668 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
669 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
670 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
671 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
672 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
673 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
674 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
675 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
676 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
677 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
680 case Type::FloatTyID:
681 switch (CE->getOpcode()) {
682 default: llvm_unreachable("Invalid float opcode");
683 case Instruction::FAdd:
684 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
685 case Instruction::FSub:
686 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
687 case Instruction::FMul:
688 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
689 case Instruction::FDiv:
690 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
691 case Instruction::FRem:
692 GV.FloatVal = std::fmod(LHS.FloatVal,RHS.FloatVal); break;
695 case Type::DoubleTyID:
696 switch (CE->getOpcode()) {
697 default: llvm_unreachable("Invalid double opcode");
698 case Instruction::FAdd:
699 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
700 case Instruction::FSub:
701 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
702 case Instruction::FMul:
703 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
704 case Instruction::FDiv:
705 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
706 case Instruction::FRem:
707 GV.DoubleVal = std::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
710 case Type::X86_FP80TyID:
711 case Type::PPC_FP128TyID:
712 case Type::FP128TyID: {
713 APFloat apfLHS = APFloat(LHS.IntVal);
714 switch (CE->getOpcode()) {
715 default: llvm_unreachable("Invalid long double opcode");
716 case Instruction::FAdd:
717 apfLHS.add(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
718 GV.IntVal = apfLHS.bitcastToAPInt();
720 case Instruction::FSub:
721 apfLHS.subtract(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
722 GV.IntVal = apfLHS.bitcastToAPInt();
724 case Instruction::FMul:
725 apfLHS.multiply(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
726 GV.IntVal = apfLHS.bitcastToAPInt();
728 case Instruction::FDiv:
729 apfLHS.divide(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
730 GV.IntVal = apfLHS.bitcastToAPInt();
732 case Instruction::FRem:
733 apfLHS.mod(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
734 GV.IntVal = apfLHS.bitcastToAPInt();
746 SmallString<256> Msg;
747 raw_svector_ostream OS(Msg);
748 OS << "ConstantExpr not handled: " << *CE;
749 report_fatal_error(OS.str());
752 // Otherwise, we have a simple constant.
754 switch (C->getType()->getTypeID()) {
755 case Type::FloatTyID:
756 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
758 case Type::DoubleTyID:
759 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
761 case Type::X86_FP80TyID:
762 case Type::FP128TyID:
763 case Type::PPC_FP128TyID:
764 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
766 case Type::IntegerTyID:
767 Result.IntVal = cast<ConstantInt>(C)->getValue();
769 case Type::PointerTyID:
770 if (isa<ConstantPointerNull>(C))
771 Result.PointerVal = 0;
772 else if (const Function *F = dyn_cast<Function>(C))
773 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
774 else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
775 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
776 else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C))
777 Result = PTOGV(getPointerToBasicBlock(const_cast<BasicBlock*>(
778 BA->getBasicBlock())));
780 llvm_unreachable("Unknown constant pointer type!");
783 SmallString<256> Msg;
784 raw_svector_ostream OS(Msg);
785 OS << "ERROR: Constant unimplemented for type: " << *C->getType();
786 report_fatal_error(OS.str());
792 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
793 /// with the integer held in IntVal.
794 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
795 unsigned StoreBytes) {
796 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
797 uint8_t *Src = (uint8_t *)IntVal.getRawData();
799 if (sys::isLittleEndianHost()) {
800 // Little-endian host - the source is ordered from LSB to MSB. Order the
801 // destination from LSB to MSB: Do a straight copy.
802 memcpy(Dst, Src, StoreBytes);
804 // Big-endian host - the source is an array of 64 bit words ordered from
805 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
806 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
807 while (StoreBytes > sizeof(uint64_t)) {
808 StoreBytes -= sizeof(uint64_t);
809 // May not be aligned so use memcpy.
810 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
811 Src += sizeof(uint64_t);
814 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
818 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
819 GenericValue *Ptr, const Type *Ty) {
820 const unsigned StoreBytes = getTargetData()->getTypeStoreSize(Ty);
822 switch (Ty->getTypeID()) {
823 case Type::IntegerTyID:
824 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
826 case Type::FloatTyID:
827 *((float*)Ptr) = Val.FloatVal;
829 case Type::DoubleTyID:
830 *((double*)Ptr) = Val.DoubleVal;
832 case Type::X86_FP80TyID:
833 memcpy(Ptr, Val.IntVal.getRawData(), 10);
835 case Type::PointerTyID:
836 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
837 if (StoreBytes != sizeof(PointerTy))
838 memset(Ptr, 0, StoreBytes);
840 *((PointerTy*)Ptr) = Val.PointerVal;
843 dbgs() << "Cannot store value of type " << *Ty << "!\n";
846 if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian())
847 // Host and target are different endian - reverse the stored bytes.
848 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
851 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
852 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
853 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
854 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
855 uint8_t *Dst = (uint8_t *)IntVal.getRawData();
857 if (sys::isLittleEndianHost())
858 // Little-endian host - the destination must be ordered from LSB to MSB.
859 // The source is ordered from LSB to MSB: Do a straight copy.
860 memcpy(Dst, Src, LoadBytes);
862 // Big-endian - the destination is an array of 64 bit words ordered from
863 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
864 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
866 while (LoadBytes > sizeof(uint64_t)) {
867 LoadBytes -= sizeof(uint64_t);
868 // May not be aligned so use memcpy.
869 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
870 Dst += sizeof(uint64_t);
873 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
879 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
882 const unsigned LoadBytes = getTargetData()->getTypeStoreSize(Ty);
884 switch (Ty->getTypeID()) {
885 case Type::IntegerTyID:
886 // An APInt with all words initially zero.
887 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
888 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
890 case Type::FloatTyID:
891 Result.FloatVal = *((float*)Ptr);
893 case Type::DoubleTyID:
894 Result.DoubleVal = *((double*)Ptr);
896 case Type::PointerTyID:
897 Result.PointerVal = *((PointerTy*)Ptr);
899 case Type::X86_FP80TyID: {
900 // This is endian dependent, but it will only work on x86 anyway.
901 // FIXME: Will not trap if loading a signaling NaN.
904 Result.IntVal = APInt(80, 2, y);
908 SmallString<256> Msg;
909 raw_svector_ostream OS(Msg);
910 OS << "Cannot load value of type " << *Ty << "!";
911 report_fatal_error(OS.str());
915 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
916 DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
918 if (isa<UndefValue>(Init)) {
920 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
921 unsigned ElementSize =
922 getTargetData()->getTypeAllocSize(CP->getType()->getElementType());
923 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
924 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
926 } else if (isa<ConstantAggregateZero>(Init)) {
927 memset(Addr, 0, (size_t)getTargetData()->getTypeAllocSize(Init->getType()));
929 } else if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
930 unsigned ElementSize =
931 getTargetData()->getTypeAllocSize(CPA->getType()->getElementType());
932 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
933 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
935 } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
936 const StructLayout *SL =
937 getTargetData()->getStructLayout(cast<StructType>(CPS->getType()));
938 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
939 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
941 } else if (Init->getType()->isFirstClassType()) {
942 GenericValue Val = getConstantValue(Init);
943 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
947 DEBUG(dbgs() << "Bad Type: " << *Init->getType() << "\n");
948 llvm_unreachable("Unknown constant type to initialize memory with!");
951 /// EmitGlobals - Emit all of the global variables to memory, storing their
952 /// addresses into GlobalAddress. This must make sure to copy the contents of
953 /// their initializers into the memory.
954 void ExecutionEngine::emitGlobals() {
955 // Loop over all of the global variables in the program, allocating the memory
956 // to hold them. If there is more than one module, do a prepass over globals
957 // to figure out how the different modules should link together.
958 std::map<std::pair<std::string, const Type*>,
959 const GlobalValue*> LinkedGlobalsMap;
961 if (Modules.size() != 1) {
962 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
963 Module &M = *Modules[m];
964 for (Module::const_global_iterator I = M.global_begin(),
965 E = M.global_end(); I != E; ++I) {
966 const GlobalValue *GV = I;
967 if (GV->hasLocalLinkage() || GV->isDeclaration() ||
968 GV->hasAppendingLinkage() || !GV->hasName())
969 continue;// Ignore external globals and globals with internal linkage.
971 const GlobalValue *&GVEntry =
972 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
974 // If this is the first time we've seen this global, it is the canonical
981 // If the existing global is strong, never replace it.
982 if (GVEntry->hasExternalLinkage() ||
983 GVEntry->hasDLLImportLinkage() ||
984 GVEntry->hasDLLExportLinkage())
987 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
988 // symbol. FIXME is this right for common?
989 if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
995 std::vector<const GlobalValue*> NonCanonicalGlobals;
996 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
997 Module &M = *Modules[m];
998 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
1000 // In the multi-module case, see what this global maps to.
1001 if (!LinkedGlobalsMap.empty()) {
1002 if (const GlobalValue *GVEntry =
1003 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())]) {
1004 // If something else is the canonical global, ignore this one.
1005 if (GVEntry != &*I) {
1006 NonCanonicalGlobals.push_back(I);
1012 if (!I->isDeclaration()) {
1013 addGlobalMapping(I, getMemoryForGV(I));
1015 // External variable reference. Try to use the dynamic loader to
1016 // get a pointer to it.
1018 sys::DynamicLibrary::SearchForAddressOfSymbol(I->getName()))
1019 addGlobalMapping(I, SymAddr);
1021 report_fatal_error("Could not resolve external global address: "
1027 // If there are multiple modules, map the non-canonical globals to their
1028 // canonical location.
1029 if (!NonCanonicalGlobals.empty()) {
1030 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
1031 const GlobalValue *GV = NonCanonicalGlobals[i];
1032 const GlobalValue *CGV =
1033 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
1034 void *Ptr = getPointerToGlobalIfAvailable(CGV);
1035 assert(Ptr && "Canonical global wasn't codegen'd!");
1036 addGlobalMapping(GV, Ptr);
1040 // Now that all of the globals are set up in memory, loop through them all
1041 // and initialize their contents.
1042 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
1044 if (!I->isDeclaration()) {
1045 if (!LinkedGlobalsMap.empty()) {
1046 if (const GlobalValue *GVEntry =
1047 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())])
1048 if (GVEntry != &*I) // Not the canonical variable.
1051 EmitGlobalVariable(I);
1057 // EmitGlobalVariable - This method emits the specified global variable to the
1058 // address specified in GlobalAddresses, or allocates new memory if it's not
1059 // already in the map.
1060 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1061 void *GA = getPointerToGlobalIfAvailable(GV);
1064 // If it's not already specified, allocate memory for the global.
1065 GA = getMemoryForGV(GV);
1066 addGlobalMapping(GV, GA);
1069 // Don't initialize if it's thread local, let the client do it.
1070 if (!GV->isThreadLocal())
1071 InitializeMemory(GV->getInitializer(), GA);
1073 const Type *ElTy = GV->getType()->getElementType();
1074 size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
1075 NumInitBytes += (unsigned)GVSize;
1079 ExecutionEngineState::ExecutionEngineState(ExecutionEngine &EE)
1080 : EE(EE), GlobalAddressMap(this) {
1084 ExecutionEngineState::AddressMapConfig::getMutex(ExecutionEngineState *EES) {
1085 return &EES->EE.lock;
1088 void ExecutionEngineState::AddressMapConfig::onDelete(ExecutionEngineState *EES,
1089 const GlobalValue *Old) {
1090 void *OldVal = EES->GlobalAddressMap.lookup(Old);
1091 EES->GlobalAddressReverseMap.erase(OldVal);
1094 void ExecutionEngineState::AddressMapConfig::onRAUW(ExecutionEngineState *,
1095 const GlobalValue *,
1096 const GlobalValue *) {
1097 assert(false && "The ExecutionEngine doesn't know how to handle a"
1098 " RAUW on a value it has a global mapping for.");