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/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/Module.h"
19 #include "llvm/ModuleProvider.h"
20 #include "llvm/ADT/Statistic.h"
21 #include "llvm/Config/alloca.h"
22 #include "llvm/ExecutionEngine/ExecutionEngine.h"
23 #include "llvm/ExecutionEngine/GenericValue.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/MutexGuard.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include "llvm/System/DynamicLibrary.h"
29 #include "llvm/System/Host.h"
30 #include "llvm/Target/TargetData.h"
35 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
36 STATISTIC(NumGlobals , "Number of global vars initialized");
38 ExecutionEngine::EECtorFn ExecutionEngine::JITCtor = 0;
39 ExecutionEngine::EECtorFn ExecutionEngine::InterpCtor = 0;
40 ExecutionEngine::EERegisterFn ExecutionEngine::ExceptionTableRegister = 0;
43 ExecutionEngine::ExecutionEngine(ModuleProvider *P) : LazyFunctionCreator(0) {
44 LazyCompilationDisabled = false;
45 GVCompilationDisabled = false;
46 SymbolSearchingDisabled = false;
47 DlsymStubsEnabled = false;
49 assert(P && "ModuleProvider is null?");
52 ExecutionEngine::~ExecutionEngine() {
53 clearAllGlobalMappings();
54 for (unsigned i = 0, e = Modules.size(); i != e; ++i)
58 char* ExecutionEngine::getMemoryForGV(const GlobalVariable* GV) {
59 const Type *ElTy = GV->getType()->getElementType();
60 size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
61 return new char[GVSize];
64 /// removeModuleProvider - Remove a ModuleProvider from the list of modules.
65 /// Relases the Module from the ModuleProvider, materializing it in the
66 /// process, and returns the materialized Module.
67 Module* ExecutionEngine::removeModuleProvider(ModuleProvider *P,
68 std::string *ErrInfo) {
69 for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
70 E = Modules.end(); I != E; ++I) {
71 ModuleProvider *MP = *I;
74 clearGlobalMappingsFromModule(MP->getModule());
75 return MP->releaseModule(ErrInfo);
81 /// deleteModuleProvider - Remove a ModuleProvider from the list of modules,
82 /// and deletes the ModuleProvider and owned Module. Avoids materializing
83 /// the underlying module.
84 void ExecutionEngine::deleteModuleProvider(ModuleProvider *P,
85 std::string *ErrInfo) {
86 for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
87 E = Modules.end(); I != E; ++I) {
88 ModuleProvider *MP = *I;
91 clearGlobalMappingsFromModule(MP->getModule());
98 /// FindFunctionNamed - Search all of the active modules to find the one that
99 /// defines FnName. This is very slow operation and shouldn't be used for
101 Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
102 for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
103 if (Function *F = Modules[i]->getModule()->getFunction(FnName))
110 /// addGlobalMapping - Tell the execution engine that the specified global is
111 /// at the specified location. This is used internally as functions are JIT'd
112 /// and as global variables are laid out in memory. It can and should also be
113 /// used by clients of the EE that want to have an LLVM global overlay
114 /// existing data in memory.
115 void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
116 MutexGuard locked(lock);
118 DOUT << "JIT: Map \'" << GV->getNameStart() << "\' to [" << Addr << "]\n";
119 void *&CurVal = state.getGlobalAddressMap(locked)[GV];
120 assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
123 // If we are using the reverse mapping, add it too
124 if (!state.getGlobalAddressReverseMap(locked).empty()) {
125 const GlobalValue *&V = state.getGlobalAddressReverseMap(locked)[Addr];
126 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
131 /// clearAllGlobalMappings - Clear all global mappings and start over again
132 /// use in dynamic compilation scenarios when you want to move globals
133 void ExecutionEngine::clearAllGlobalMappings() {
134 MutexGuard locked(lock);
136 state.getGlobalAddressMap(locked).clear();
137 state.getGlobalAddressReverseMap(locked).clear();
140 /// clearGlobalMappingsFromModule - Clear all global mappings that came from a
141 /// particular module, because it has been removed from the JIT.
142 void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
143 MutexGuard locked(lock);
145 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI) {
146 state.getGlobalAddressMap(locked).erase(FI);
147 state.getGlobalAddressReverseMap(locked).erase(FI);
149 for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
151 state.getGlobalAddressMap(locked).erase(GI);
152 state.getGlobalAddressReverseMap(locked).erase(GI);
156 /// updateGlobalMapping - Replace an existing mapping for GV with a new
157 /// address. This updates both maps as required. If "Addr" is null, the
158 /// entry for the global is removed from the mappings.
159 void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
160 MutexGuard locked(lock);
162 std::map<const GlobalValue*, void *> &Map = state.getGlobalAddressMap(locked);
164 // Deleting from the mapping?
166 std::map<const GlobalValue*, void *>::iterator I = Map.find(GV);
175 if (!state.getGlobalAddressReverseMap(locked).empty())
176 state.getGlobalAddressReverseMap(locked).erase(Addr);
180 void *&CurVal = Map[GV];
181 void *OldVal = CurVal;
183 if (CurVal && !state.getGlobalAddressReverseMap(locked).empty())
184 state.getGlobalAddressReverseMap(locked).erase(CurVal);
187 // If we are using the reverse mapping, add it too
188 if (!state.getGlobalAddressReverseMap(locked).empty()) {
189 const GlobalValue *&V = state.getGlobalAddressReverseMap(locked)[Addr];
190 assert((V == 0 || GV == 0) && "GlobalMapping already established!");
196 /// getPointerToGlobalIfAvailable - This returns the address of the specified
197 /// global value if it is has already been codegen'd, otherwise it returns null.
199 void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
200 MutexGuard locked(lock);
202 std::map<const GlobalValue*, void*>::iterator I =
203 state.getGlobalAddressMap(locked).find(GV);
204 return I != state.getGlobalAddressMap(locked).end() ? I->second : 0;
207 /// getGlobalValueAtAddress - Return the LLVM global value object that starts
208 /// at the specified address.
210 const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
211 MutexGuard locked(lock);
213 // If we haven't computed the reverse mapping yet, do so first.
214 if (state.getGlobalAddressReverseMap(locked).empty()) {
215 for (std::map<const GlobalValue*, void *>::iterator
216 I = state.getGlobalAddressMap(locked).begin(),
217 E = state.getGlobalAddressMap(locked).end(); I != E; ++I)
218 state.getGlobalAddressReverseMap(locked).insert(std::make_pair(I->second,
222 std::map<void *, const GlobalValue*>::iterator I =
223 state.getGlobalAddressReverseMap(locked).find(Addr);
224 return I != state.getGlobalAddressReverseMap(locked).end() ? I->second : 0;
227 // CreateArgv - Turn a vector of strings into a nice argv style array of
228 // pointers to null terminated strings.
230 static void *CreateArgv(ExecutionEngine *EE,
231 const std::vector<std::string> &InputArgv) {
232 unsigned PtrSize = EE->getTargetData()->getPointerSize();
233 char *Result = new char[(InputArgv.size()+1)*PtrSize];
235 DOUT << "JIT: ARGV = " << (void*)Result << "\n";
236 const Type *SBytePtr = PointerType::getUnqual(Type::Int8Ty);
238 for (unsigned i = 0; i != InputArgv.size(); ++i) {
239 unsigned Size = InputArgv[i].size()+1;
240 char *Dest = new char[Size];
241 DOUT << "JIT: ARGV[" << i << "] = " << (void*)Dest << "\n";
243 std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
246 // Endian safe: Result[i] = (PointerTy)Dest;
247 EE->StoreValueToMemory(PTOGV(Dest), (GenericValue*)(Result+i*PtrSize),
252 EE->StoreValueToMemory(PTOGV(0),
253 (GenericValue*)(Result+InputArgv.size()*PtrSize),
259 /// runStaticConstructorsDestructors - This method is used to execute all of
260 /// the static constructors or destructors for a module, depending on the
261 /// value of isDtors.
262 void ExecutionEngine::runStaticConstructorsDestructors(Module *module, bool isDtors) {
263 const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
265 // Execute global ctors/dtors for each module in the program.
267 GlobalVariable *GV = module->getNamedGlobal(Name);
269 // If this global has internal linkage, or if it has a use, then it must be
270 // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
271 // this is the case, don't execute any of the global ctors, __main will do
273 if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
275 // Should be an array of '{ int, void ()* }' structs. The first value is
276 // the init priority, which we ignore.
277 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
278 if (!InitList) return;
279 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
280 if (ConstantStruct *CS =
281 dyn_cast<ConstantStruct>(InitList->getOperand(i))) {
282 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
284 Constant *FP = CS->getOperand(1);
285 if (FP->isNullValue())
286 break; // Found a null terminator, exit.
288 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
290 FP = CE->getOperand(0);
291 if (Function *F = dyn_cast<Function>(FP)) {
292 // Execute the ctor/dtor function!
293 runFunction(F, std::vector<GenericValue>());
298 /// runStaticConstructorsDestructors - This method is used to execute all of
299 /// the static constructors or destructors for a program, depending on the
300 /// value of isDtors.
301 void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
302 // Execute global ctors/dtors for each module in the program.
303 for (unsigned m = 0, e = Modules.size(); m != e; ++m)
304 runStaticConstructorsDestructors(Modules[m]->getModule(), isDtors);
308 /// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
309 static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
310 unsigned PtrSize = EE->getTargetData()->getPointerSize();
311 for (unsigned i = 0; i < PtrSize; ++i)
312 if (*(i + (uint8_t*)Loc))
318 /// runFunctionAsMain - This is a helper function which wraps runFunction to
319 /// handle the common task of starting up main with the specified argc, argv,
320 /// and envp parameters.
321 int ExecutionEngine::runFunctionAsMain(Function *Fn,
322 const std::vector<std::string> &argv,
323 const char * const * envp) {
324 std::vector<GenericValue> GVArgs;
326 GVArgc.IntVal = APInt(32, argv.size());
329 unsigned NumArgs = Fn->getFunctionType()->getNumParams();
330 const FunctionType *FTy = Fn->getFunctionType();
331 const Type* PPInt8Ty =
332 PointerType::getUnqual(PointerType::getUnqual(Type::Int8Ty));
335 if (FTy->getParamType(2) != PPInt8Ty) {
336 llvm_report_error("Invalid type for third argument of main() supplied");
340 if (FTy->getParamType(1) != PPInt8Ty) {
341 llvm_report_error("Invalid type for second argument of main() supplied");
345 if (FTy->getParamType(0) != Type::Int32Ty) {
346 llvm_report_error("Invalid type for first argument of main() supplied");
350 if (!isa<IntegerType>(FTy->getReturnType()) &&
351 FTy->getReturnType() != Type::VoidTy) {
352 llvm_report_error("Invalid return type of main() supplied");
356 llvm_report_error("Invalid number of arguments of main() supplied");
360 GVArgs.push_back(GVArgc); // Arg #0 = argc.
362 GVArgs.push_back(PTOGV(CreateArgv(this, argv))); // Arg #1 = argv.
363 assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
364 "argv[0] was null after CreateArgv");
366 std::vector<std::string> EnvVars;
367 for (unsigned i = 0; envp[i]; ++i)
368 EnvVars.push_back(envp[i]);
369 GVArgs.push_back(PTOGV(CreateArgv(this, EnvVars))); // Arg #2 = envp.
373 return runFunction(Fn, GVArgs).IntVal.getZExtValue();
376 /// If possible, create a JIT, unless the caller specifically requests an
377 /// Interpreter or there's an error. If even an Interpreter cannot be created,
378 /// NULL is returned.
380 ExecutionEngine *ExecutionEngine::create(ModuleProvider *MP,
381 bool ForceInterpreter,
382 std::string *ErrorStr,
383 CodeGenOpt::Level OptLevel,
385 ExecutionEngine *EE = 0;
387 // Make sure we can resolve symbols in the program as well. The zero arg
388 // to the function tells DynamicLibrary to load the program, not a library.
389 if (sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr))
392 // Unless the interpreter was explicitly selected, try making a JIT.
393 if (!ForceInterpreter && JITCtor)
394 EE = JITCtor(MP, ErrorStr, OptLevel, GVsWithCode);
396 // If we can't make a JIT, make an interpreter instead.
397 if (EE == 0 && InterpCtor)
398 EE = InterpCtor(MP, ErrorStr, OptLevel, GVsWithCode);
403 ExecutionEngine *ExecutionEngine::create(Module *M) {
404 return create(new ExistingModuleProvider(M));
407 /// getPointerToGlobal - This returns the address of the specified global
408 /// value. This may involve code generation if it's a function.
410 void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
411 if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
412 return getPointerToFunction(F);
414 MutexGuard locked(lock);
415 void *p = state.getGlobalAddressMap(locked)[GV];
419 // Global variable might have been added since interpreter started.
420 if (GlobalVariable *GVar =
421 const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
422 EmitGlobalVariable(GVar);
424 assert(0 && "Global hasn't had an address allocated yet!");
425 return state.getGlobalAddressMap(locked)[GV];
428 /// This function converts a Constant* into a GenericValue. The interesting
429 /// part is if C is a ConstantExpr.
430 /// @brief Get a GenericValue for a Constant*
431 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
432 // If its undefined, return the garbage.
433 if (isa<UndefValue>(C))
434 return GenericValue();
436 // If the value is a ConstantExpr
437 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
438 Constant *Op0 = CE->getOperand(0);
439 switch (CE->getOpcode()) {
440 case Instruction::GetElementPtr: {
442 GenericValue Result = getConstantValue(Op0);
443 SmallVector<Value*, 8> Indices(CE->op_begin()+1, CE->op_end());
445 TD->getIndexedOffset(Op0->getType(), &Indices[0], Indices.size());
447 char* tmp = (char*) Result.PointerVal;
448 Result = PTOGV(tmp + Offset);
451 case Instruction::Trunc: {
452 GenericValue GV = getConstantValue(Op0);
453 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
454 GV.IntVal = GV.IntVal.trunc(BitWidth);
457 case Instruction::ZExt: {
458 GenericValue GV = getConstantValue(Op0);
459 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
460 GV.IntVal = GV.IntVal.zext(BitWidth);
463 case Instruction::SExt: {
464 GenericValue GV = getConstantValue(Op0);
465 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
466 GV.IntVal = GV.IntVal.sext(BitWidth);
469 case Instruction::FPTrunc: {
471 GenericValue GV = getConstantValue(Op0);
472 GV.FloatVal = float(GV.DoubleVal);
475 case Instruction::FPExt:{
477 GenericValue GV = getConstantValue(Op0);
478 GV.DoubleVal = double(GV.FloatVal);
481 case Instruction::UIToFP: {
482 GenericValue GV = getConstantValue(Op0);
483 if (CE->getType() == Type::FloatTy)
484 GV.FloatVal = float(GV.IntVal.roundToDouble());
485 else if (CE->getType() == Type::DoubleTy)
486 GV.DoubleVal = GV.IntVal.roundToDouble();
487 else if (CE->getType() == Type::X86_FP80Ty) {
488 const uint64_t zero[] = {0, 0};
489 APFloat apf = APFloat(APInt(80, 2, zero));
490 (void)apf.convertFromAPInt(GV.IntVal,
492 APFloat::rmNearestTiesToEven);
493 GV.IntVal = apf.bitcastToAPInt();
497 case Instruction::SIToFP: {
498 GenericValue GV = getConstantValue(Op0);
499 if (CE->getType() == Type::FloatTy)
500 GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
501 else if (CE->getType() == Type::DoubleTy)
502 GV.DoubleVal = GV.IntVal.signedRoundToDouble();
503 else if (CE->getType() == Type::X86_FP80Ty) {
504 const uint64_t zero[] = { 0, 0};
505 APFloat apf = APFloat(APInt(80, 2, zero));
506 (void)apf.convertFromAPInt(GV.IntVal,
508 APFloat::rmNearestTiesToEven);
509 GV.IntVal = apf.bitcastToAPInt();
513 case Instruction::FPToUI: // double->APInt conversion handles sign
514 case Instruction::FPToSI: {
515 GenericValue GV = getConstantValue(Op0);
516 uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
517 if (Op0->getType() == Type::FloatTy)
518 GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
519 else if (Op0->getType() == Type::DoubleTy)
520 GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
521 else if (Op0->getType() == Type::X86_FP80Ty) {
522 APFloat apf = APFloat(GV.IntVal);
525 (void)apf.convertToInteger(&v, BitWidth,
526 CE->getOpcode()==Instruction::FPToSI,
527 APFloat::rmTowardZero, &ignored);
528 GV.IntVal = v; // endian?
532 case Instruction::PtrToInt: {
533 GenericValue GV = getConstantValue(Op0);
534 uint32_t PtrWidth = TD->getPointerSizeInBits();
535 GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
538 case Instruction::IntToPtr: {
539 GenericValue GV = getConstantValue(Op0);
540 uint32_t PtrWidth = TD->getPointerSizeInBits();
541 if (PtrWidth != GV.IntVal.getBitWidth())
542 GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
543 assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
544 GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
547 case Instruction::BitCast: {
548 GenericValue GV = getConstantValue(Op0);
549 const Type* DestTy = CE->getType();
550 switch (Op0->getType()->getTypeID()) {
551 default: assert(0 && "Invalid bitcast operand");
552 case Type::IntegerTyID:
553 assert(DestTy->isFloatingPoint() && "invalid bitcast");
554 if (DestTy == Type::FloatTy)
555 GV.FloatVal = GV.IntVal.bitsToFloat();
556 else if (DestTy == Type::DoubleTy)
557 GV.DoubleVal = GV.IntVal.bitsToDouble();
559 case Type::FloatTyID:
560 assert(DestTy == Type::Int32Ty && "Invalid bitcast");
561 GV.IntVal.floatToBits(GV.FloatVal);
563 case Type::DoubleTyID:
564 assert(DestTy == Type::Int64Ty && "Invalid bitcast");
565 GV.IntVal.doubleToBits(GV.DoubleVal);
567 case Type::PointerTyID:
568 assert(isa<PointerType>(DestTy) && "Invalid bitcast");
569 break; // getConstantValue(Op0) above already converted it
573 case Instruction::Add:
574 case Instruction::FAdd:
575 case Instruction::Sub:
576 case Instruction::FSub:
577 case Instruction::Mul:
578 case Instruction::FMul:
579 case Instruction::UDiv:
580 case Instruction::SDiv:
581 case Instruction::URem:
582 case Instruction::SRem:
583 case Instruction::And:
584 case Instruction::Or:
585 case Instruction::Xor: {
586 GenericValue LHS = getConstantValue(Op0);
587 GenericValue RHS = getConstantValue(CE->getOperand(1));
589 switch (CE->getOperand(0)->getType()->getTypeID()) {
590 default: LLVM_UNREACHABLE("Bad add type!");
591 case Type::IntegerTyID:
592 switch (CE->getOpcode()) {
593 default: assert(0 && "Invalid integer opcode");
594 case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
595 case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
596 case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
597 case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
598 case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
599 case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
600 case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
601 case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
602 case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
603 case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
606 case Type::FloatTyID:
607 switch (CE->getOpcode()) {
608 default: LLVM_UNREACHABLE("Invalid float opcode");
609 case Instruction::FAdd:
610 GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
611 case Instruction::FSub:
612 GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
613 case Instruction::FMul:
614 GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
615 case Instruction::FDiv:
616 GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
617 case Instruction::FRem:
618 GV.FloatVal = ::fmodf(LHS.FloatVal,RHS.FloatVal); break;
621 case Type::DoubleTyID:
622 switch (CE->getOpcode()) {
623 default: LLVM_UNREACHABLE("Invalid double opcode");
624 case Instruction::FAdd:
625 GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
626 case Instruction::FSub:
627 GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
628 case Instruction::FMul:
629 GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
630 case Instruction::FDiv:
631 GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
632 case Instruction::FRem:
633 GV.DoubleVal = ::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
636 case Type::X86_FP80TyID:
637 case Type::PPC_FP128TyID:
638 case Type::FP128TyID: {
639 APFloat apfLHS = APFloat(LHS.IntVal);
640 switch (CE->getOpcode()) {
641 default: assert(0 && "Invalid long double opcode");llvm_unreachable();
642 case Instruction::FAdd:
643 apfLHS.add(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
644 GV.IntVal = apfLHS.bitcastToAPInt();
646 case Instruction::FSub:
647 apfLHS.subtract(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
648 GV.IntVal = apfLHS.bitcastToAPInt();
650 case Instruction::FMul:
651 apfLHS.multiply(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
652 GV.IntVal = apfLHS.bitcastToAPInt();
654 case Instruction::FDiv:
655 apfLHS.divide(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
656 GV.IntVal = apfLHS.bitcastToAPInt();
658 case Instruction::FRem:
659 apfLHS.mod(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
660 GV.IntVal = apfLHS.bitcastToAPInt();
672 raw_string_ostream Msg(msg);
673 Msg << "ConstantExpr not handled: " << *CE;
674 llvm_report_error(Msg.str());
678 switch (C->getType()->getTypeID()) {
679 case Type::FloatTyID:
680 Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
682 case Type::DoubleTyID:
683 Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
685 case Type::X86_FP80TyID:
686 case Type::FP128TyID:
687 case Type::PPC_FP128TyID:
688 Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
690 case Type::IntegerTyID:
691 Result.IntVal = cast<ConstantInt>(C)->getValue();
693 case Type::PointerTyID:
694 if (isa<ConstantPointerNull>(C))
695 Result.PointerVal = 0;
696 else if (const Function *F = dyn_cast<Function>(C))
697 Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
698 else if (const GlobalVariable* GV = dyn_cast<GlobalVariable>(C))
699 Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
701 assert(0 && "Unknown constant pointer type!");
705 raw_string_ostream Msg(msg);
706 Msg << "ERROR: Constant unimplemented for type: " << *C->getType();
707 llvm_report_error(Msg.str());
712 /// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
713 /// with the integer held in IntVal.
714 static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
715 unsigned StoreBytes) {
716 assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
717 uint8_t *Src = (uint8_t *)IntVal.getRawData();
719 if (sys::isLittleEndianHost())
720 // Little-endian host - the source is ordered from LSB to MSB. Order the
721 // destination from LSB to MSB: Do a straight copy.
722 memcpy(Dst, Src, StoreBytes);
724 // Big-endian host - the source is an array of 64 bit words ordered from
725 // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
726 // from MSB to LSB: Reverse the word order, but not the bytes in a word.
727 while (StoreBytes > sizeof(uint64_t)) {
728 StoreBytes -= sizeof(uint64_t);
729 // May not be aligned so use memcpy.
730 memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
731 Src += sizeof(uint64_t);
734 memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
738 /// StoreValueToMemory - Stores the data in Val of type Ty at address Ptr. Ptr
739 /// is the address of the memory at which to store Val, cast to GenericValue *.
740 /// It is not a pointer to a GenericValue containing the address at which to
742 void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
743 GenericValue *Ptr, const Type *Ty) {
744 const unsigned StoreBytes = getTargetData()->getTypeStoreSize(Ty);
746 switch (Ty->getTypeID()) {
747 case Type::IntegerTyID:
748 StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
750 case Type::FloatTyID:
751 *((float*)Ptr) = Val.FloatVal;
753 case Type::DoubleTyID:
754 *((double*)Ptr) = Val.DoubleVal;
756 case Type::X86_FP80TyID:
757 memcpy(Ptr, Val.IntVal.getRawData(), 10);
759 case Type::PointerTyID:
760 // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
761 if (StoreBytes != sizeof(PointerTy))
762 memset(Ptr, 0, StoreBytes);
764 *((PointerTy*)Ptr) = Val.PointerVal;
767 cerr << "Cannot store value of type " << *Ty << "!\n";
770 if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian())
771 // Host and target are different endian - reverse the stored bytes.
772 std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
775 /// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
776 /// from Src into IntVal, which is assumed to be wide enough and to hold zero.
777 static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
778 assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
779 uint8_t *Dst = (uint8_t *)IntVal.getRawData();
781 if (sys::isLittleEndianHost())
782 // Little-endian host - the destination must be ordered from LSB to MSB.
783 // The source is ordered from LSB to MSB: Do a straight copy.
784 memcpy(Dst, Src, LoadBytes);
786 // Big-endian - the destination is an array of 64 bit words ordered from
787 // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
788 // ordered from MSB to LSB: Reverse the word order, but not the bytes in
790 while (LoadBytes > sizeof(uint64_t)) {
791 LoadBytes -= sizeof(uint64_t);
792 // May not be aligned so use memcpy.
793 memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
794 Dst += sizeof(uint64_t);
797 memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
803 void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
806 const unsigned LoadBytes = getTargetData()->getTypeStoreSize(Ty);
808 if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian()) {
809 // Host and target are different endian - reverse copy the stored
810 // bytes into a buffer, and load from that.
811 uint8_t *Src = (uint8_t*)Ptr;
812 uint8_t *Buf = (uint8_t*)alloca(LoadBytes);
813 std::reverse_copy(Src, Src + LoadBytes, Buf);
814 Ptr = (GenericValue*)Buf;
817 switch (Ty->getTypeID()) {
818 case Type::IntegerTyID:
819 // An APInt with all words initially zero.
820 Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
821 LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
823 case Type::FloatTyID:
824 Result.FloatVal = *((float*)Ptr);
826 case Type::DoubleTyID:
827 Result.DoubleVal = *((double*)Ptr);
829 case Type::PointerTyID:
830 Result.PointerVal = *((PointerTy*)Ptr);
832 case Type::X86_FP80TyID: {
833 // This is endian dependent, but it will only work on x86 anyway.
834 // FIXME: Will not trap if loading a signaling NaN.
837 Result.IntVal = APInt(80, 2, y);
842 raw_string_ostream Msg(msg);
843 Msg << "Cannot load value of type " << *Ty << "!";
844 llvm_report_error(Msg.str());
848 // InitializeMemory - Recursive function to apply a Constant value into the
849 // specified memory location...
851 void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
852 DOUT << "JIT: Initializing " << Addr << " ";
854 if (isa<UndefValue>(Init)) {
856 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
857 unsigned ElementSize =
858 getTargetData()->getTypeAllocSize(CP->getType()->getElementType());
859 for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
860 InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
862 } else if (isa<ConstantAggregateZero>(Init)) {
863 memset(Addr, 0, (size_t)getTargetData()->getTypeAllocSize(Init->getType()));
865 } else if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
866 unsigned ElementSize =
867 getTargetData()->getTypeAllocSize(CPA->getType()->getElementType());
868 for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
869 InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
871 } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
872 const StructLayout *SL =
873 getTargetData()->getStructLayout(cast<StructType>(CPS->getType()));
874 for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
875 InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
877 } else if (Init->getType()->isFirstClassType()) {
878 GenericValue Val = getConstantValue(Init);
879 StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
883 cerr << "Bad Type: " << *Init->getType() << "\n";
884 assert(0 && "Unknown constant type to initialize memory with!");
887 /// EmitGlobals - Emit all of the global variables to memory, storing their
888 /// addresses into GlobalAddress. This must make sure to copy the contents of
889 /// their initializers into the memory.
891 void ExecutionEngine::emitGlobals() {
893 // Loop over all of the global variables in the program, allocating the memory
894 // to hold them. If there is more than one module, do a prepass over globals
895 // to figure out how the different modules should link together.
897 std::map<std::pair<std::string, const Type*>,
898 const GlobalValue*> LinkedGlobalsMap;
900 if (Modules.size() != 1) {
901 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
902 Module &M = *Modules[m]->getModule();
903 for (Module::const_global_iterator I = M.global_begin(),
904 E = M.global_end(); I != E; ++I) {
905 const GlobalValue *GV = I;
906 if (GV->hasLocalLinkage() || GV->isDeclaration() ||
907 GV->hasAppendingLinkage() || !GV->hasName())
908 continue;// Ignore external globals and globals with internal linkage.
910 const GlobalValue *&GVEntry =
911 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
913 // If this is the first time we've seen this global, it is the canonical
920 // If the existing global is strong, never replace it.
921 if (GVEntry->hasExternalLinkage() ||
922 GVEntry->hasDLLImportLinkage() ||
923 GVEntry->hasDLLExportLinkage())
926 // Otherwise, we know it's linkonce/weak, replace it if this is a strong
927 // symbol. FIXME is this right for common?
928 if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
934 std::vector<const GlobalValue*> NonCanonicalGlobals;
935 for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
936 Module &M = *Modules[m]->getModule();
937 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
939 // In the multi-module case, see what this global maps to.
940 if (!LinkedGlobalsMap.empty()) {
941 if (const GlobalValue *GVEntry =
942 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())]) {
943 // If something else is the canonical global, ignore this one.
944 if (GVEntry != &*I) {
945 NonCanonicalGlobals.push_back(I);
951 if (!I->isDeclaration()) {
952 addGlobalMapping(I, getMemoryForGV(I));
954 // External variable reference. Try to use the dynamic loader to
955 // get a pointer to it.
957 sys::DynamicLibrary::SearchForAddressOfSymbol(I->getName().c_str()))
958 addGlobalMapping(I, SymAddr);
960 llvm_report_error("Could not resolve external global address: "
966 // If there are multiple modules, map the non-canonical globals to their
967 // canonical location.
968 if (!NonCanonicalGlobals.empty()) {
969 for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
970 const GlobalValue *GV = NonCanonicalGlobals[i];
971 const GlobalValue *CGV =
972 LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
973 void *Ptr = getPointerToGlobalIfAvailable(CGV);
974 assert(Ptr && "Canonical global wasn't codegen'd!");
975 addGlobalMapping(GV, Ptr);
979 // Now that all of the globals are set up in memory, loop through them all
980 // and initialize their contents.
981 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
983 if (!I->isDeclaration()) {
984 if (!LinkedGlobalsMap.empty()) {
985 if (const GlobalValue *GVEntry =
986 LinkedGlobalsMap[std::make_pair(I->getName(), I->getType())])
987 if (GVEntry != &*I) // Not the canonical variable.
990 EmitGlobalVariable(I);
996 // EmitGlobalVariable - This method emits the specified global variable to the
997 // address specified in GlobalAddresses, or allocates new memory if it's not
998 // already in the map.
999 void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
1000 void *GA = getPointerToGlobalIfAvailable(GV);
1003 // If it's not already specified, allocate memory for the global.
1004 GA = getMemoryForGV(GV);
1005 addGlobalMapping(GV, GA);
1008 // Don't initialize if it's thread local, let the client do it.
1009 if (!GV->isThreadLocal())
1010 InitializeMemory(GV->getInitializer(), GA);
1012 const Type *ElTy = GV->getType()->getElementType();
1013 size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
1014 NumInitBytes += (unsigned)GVSize;