//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/Config/alloca.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MutexGuard.h"
#include "llvm/System/DynamicLibrary.h"
+#include "llvm/System/Host.h"
#include "llvm/Target/TargetData.h"
-#include <math.h>
+#include <cmath>
+#include <cstring>
using namespace llvm;
STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
ExecutionEngine::EECtorFn ExecutionEngine::JITCtor = 0;
ExecutionEngine::EECtorFn ExecutionEngine::InterpCtor = 0;
+ExecutionEngine::EERegisterFn ExecutionEngine::ExceptionTableRegister = 0;
-ExecutionEngine::ExecutionEngine(ModuleProvider *P) {
+
+ExecutionEngine::ExecutionEngine(ModuleProvider *P) : LazyFunctionCreator(0) {
LazyCompilationDisabled = false;
+ GVCompilationDisabled = false;
+ SymbolSearchingDisabled = false;
+ DlsymStubsEnabled = false;
Modules.push_back(P);
assert(P && "ModuleProvider is null?");
}
-ExecutionEngine::ExecutionEngine(Module *M) {
- LazyCompilationDisabled = false;
- assert(M && "Module is null?");
- Modules.push_back(new ExistingModuleProvider(M));
-}
-
ExecutionEngine::~ExecutionEngine() {
clearAllGlobalMappings();
for (unsigned i = 0, e = Modules.size(); i != e; ++i)
delete Modules[i];
}
+char* ExecutionEngine::getMemoryForGV(const GlobalVariable* GV) {
+ const Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
+ return new char[GVSize];
+}
+
+/// removeModuleProvider - Remove a ModuleProvider from the list of modules.
+/// Relases the Module from the ModuleProvider, materializing it in the
+/// process, and returns the materialized Module.
+Module* ExecutionEngine::removeModuleProvider(ModuleProvider *P,
+ std::string *ErrInfo) {
+ for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
+ E = Modules.end(); I != E; ++I) {
+ ModuleProvider *MP = *I;
+ if (MP == P) {
+ Modules.erase(I);
+ clearGlobalMappingsFromModule(MP->getModule());
+ return MP->releaseModule(ErrInfo);
+ }
+ }
+ return NULL;
+}
+
+/// deleteModuleProvider - Remove a ModuleProvider from the list of modules,
+/// and deletes the ModuleProvider and owned Module. Avoids materializing
+/// the underlying module.
+void ExecutionEngine::deleteModuleProvider(ModuleProvider *P,
+ std::string *ErrInfo) {
+ for(SmallVector<ModuleProvider *, 1>::iterator I = Modules.begin(),
+ E = Modules.end(); I != E; ++I) {
+ ModuleProvider *MP = *I;
+ if (MP == P) {
+ Modules.erase(I);
+ clearGlobalMappingsFromModule(MP->getModule());
+ delete MP;
+ return;
+ }
+ }
+}
+
/// FindFunctionNamed - Search all of the active modules to find the one that
/// defines FnName. This is very slow operation and shouldn't be used for
/// general code.
/// existing data in memory.
void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
MutexGuard locked(lock);
-
+
+ DOUT << "JIT: Map \'" << GV->getNameStart() << "\' to [" << Addr << "]\n";
void *&CurVal = state.getGlobalAddressMap(locked)[GV];
assert((CurVal == 0 || Addr == 0) && "GlobalMapping already established!");
CurVal = Addr;
state.getGlobalAddressReverseMap(locked).clear();
}
+/// clearGlobalMappingsFromModule - Clear all global mappings that came from a
+/// particular module, because it has been removed from the JIT.
+void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
+ MutexGuard locked(lock);
+
+ for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI) {
+ state.getGlobalAddressMap(locked).erase(FI);
+ state.getGlobalAddressReverseMap(locked).erase(FI);
+ }
+ for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
+ GI != GE; ++GI) {
+ state.getGlobalAddressMap(locked).erase(GI);
+ state.getGlobalAddressReverseMap(locked).erase(GI);
+ }
+}
+
/// updateGlobalMapping - Replace an existing mapping for GV with a new
/// address. This updates both maps as required. If "Addr" is null, the
/// entry for the global is removed from the mappings.
-void ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
+void *ExecutionEngine::updateGlobalMapping(const GlobalValue *GV, void *Addr) {
MutexGuard locked(lock);
-
+
+ std::map<const GlobalValue*, void *> &Map = state.getGlobalAddressMap(locked);
+
// Deleting from the mapping?
if (Addr == 0) {
- state.getGlobalAddressMap(locked).erase(GV);
+ std::map<const GlobalValue*, void *>::iterator I = Map.find(GV);
+ void *OldVal;
+ if (I == Map.end())
+ OldVal = 0;
+ else {
+ OldVal = I->second;
+ Map.erase(I);
+ }
+
if (!state.getGlobalAddressReverseMap(locked).empty())
state.getGlobalAddressReverseMap(locked).erase(Addr);
- return;
+ return OldVal;
}
- void *&CurVal = state.getGlobalAddressMap(locked)[GV];
+ void *&CurVal = Map[GV];
+ void *OldVal = CurVal;
+
if (CurVal && !state.getGlobalAddressReverseMap(locked).empty())
state.getGlobalAddressReverseMap(locked).erase(CurVal);
CurVal = Addr;
assert((V == 0 || GV == 0) && "GlobalMapping already established!");
V = GV;
}
+ return OldVal;
}
/// getPointerToGlobalIfAvailable - This returns the address of the specified
unsigned PtrSize = EE->getTargetData()->getPointerSize();
char *Result = new char[(InputArgv.size()+1)*PtrSize];
- DOUT << "ARGV = " << (void*)Result << "\n";
- const Type *SBytePtr = PointerType::get(Type::Int8Ty);
+ DOUT << "JIT: ARGV = " << (void*)Result << "\n";
+ const Type *SBytePtr = PointerType::getUnqual(Type::Int8Ty);
for (unsigned i = 0; i != InputArgv.size(); ++i) {
unsigned Size = InputArgv[i].size()+1;
char *Dest = new char[Size];
- DOUT << "ARGV[" << i << "] = " << (void*)Dest << "\n";
+ DOUT << "JIT: ARGV[" << i << "] = " << (void*)Dest << "\n";
std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest);
Dest[Size-1] = 0;
/// runStaticConstructorsDestructors - This method is used to execute all of
-/// the static constructors or destructors for a program, depending on the
+/// the static constructors or destructors for a module, depending on the
/// value of isDtors.
-void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
+void ExecutionEngine::runStaticConstructorsDestructors(Module *module, bool isDtors) {
const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
// Execute global ctors/dtors for each module in the program.
- for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
- GlobalVariable *GV = Modules[m]->getModule()->getNamedGlobal(Name);
-
- // If this global has internal linkage, or if it has a use, then it must be
- // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
- // this is the case, don't execute any of the global ctors, __main will do
- // it.
- if (!GV || GV->isDeclaration() || GV->hasInternalLinkage()) continue;
- // Should be an array of '{ int, void ()* }' structs. The first value is
- // the init priority, which we ignore.
- ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
- if (!InitList) continue;
- for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
- if (ConstantStruct *CS =
- dyn_cast<ConstantStruct>(InitList->getOperand(i))) {
- if (CS->getNumOperands() != 2) break; // Not array of 2-element structs.
-
- Constant *FP = CS->getOperand(1);
- if (FP->isNullValue())
- break; // Found a null terminator, exit.
-
- if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
- if (CE->isCast())
- FP = CE->getOperand(0);
- if (Function *F = dyn_cast<Function>(FP)) {
- // Execute the ctor/dtor function!
- runFunction(F, std::vector<GenericValue>());
- }
- }
- }
+ GlobalVariable *GV = module->getNamedGlobal(Name);
+
+ // If this global has internal linkage, or if it has a use, then it must be
+ // an old-style (llvmgcc3) static ctor with __main linked in and in use. If
+ // this is the case, don't execute any of the global ctors, __main will do
+ // it.
+ if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
+
+ // Should be an array of '{ int, void ()* }' structs. The first value is
+ // the init priority, which we ignore.
+ ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
+ if (!InitList) return;
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
+ if (ConstantStruct *CS =
+ dyn_cast<ConstantStruct>(InitList->getOperand(i))) {
+ if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
+
+ Constant *FP = CS->getOperand(1);
+ if (FP->isNullValue())
+ break; // Found a null terminator, exit.
+
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
+ if (CE->isCast())
+ FP = CE->getOperand(0);
+ if (Function *F = dyn_cast<Function>(FP)) {
+ // Execute the ctor/dtor function!
+ runFunction(F, std::vector<GenericValue>());
+ }
+ }
}
+/// runStaticConstructorsDestructors - This method is used to execute all of
+/// the static constructors or destructors for a program, depending on the
+/// value of isDtors.
+void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
+ // Execute global ctors/dtors for each module in the program.
+ for (unsigned m = 0, e = Modules.size(); m != e; ++m)
+ runStaticConstructorsDestructors(Modules[m]->getModule(), isDtors);
+}
+
+#ifndef NDEBUG
+/// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
+static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
+ unsigned PtrSize = EE->getTargetData()->getPointerSize();
+ for (unsigned i = 0; i < PtrSize; ++i)
+ if (*(i + (uint8_t*)Loc))
+ return false;
+ return true;
+}
+#endif
+
/// runFunctionAsMain - This is a helper function which wraps runFunction to
/// handle the common task of starting up main with the specified argc, argv,
/// and envp parameters.
std::vector<GenericValue> GVArgs;
GenericValue GVArgc;
GVArgc.IntVal = APInt(32, argv.size());
+
+ // Check main() type
unsigned NumArgs = Fn->getFunctionType()->getNumParams();
+ const FunctionType *FTy = Fn->getFunctionType();
+ const Type* PPInt8Ty =
+ PointerType::getUnqual(PointerType::getUnqual(Type::Int8Ty));
+ switch (NumArgs) {
+ case 3:
+ if (FTy->getParamType(2) != PPInt8Ty) {
+ cerr << "Invalid type for third argument of main() supplied\n";
+ abort();
+ }
+ // FALLS THROUGH
+ case 2:
+ if (FTy->getParamType(1) != PPInt8Ty) {
+ cerr << "Invalid type for second argument of main() supplied\n";
+ abort();
+ }
+ // FALLS THROUGH
+ case 1:
+ if (FTy->getParamType(0) != Type::Int32Ty) {
+ cerr << "Invalid type for first argument of main() supplied\n";
+ abort();
+ }
+ // FALLS THROUGH
+ case 0:
+ if (!isa<IntegerType>(FTy->getReturnType()) &&
+ FTy->getReturnType() != Type::VoidTy) {
+ cerr << "Invalid return type of main() supplied\n";
+ abort();
+ }
+ break;
+ default:
+ cerr << "Invalid number of arguments of main() supplied\n";
+ abort();
+ }
+
if (NumArgs) {
GVArgs.push_back(GVArgc); // Arg #0 = argc.
if (NumArgs > 1) {
GVArgs.push_back(PTOGV(CreateArgv(this, argv))); // Arg #1 = argv.
- assert(((char **)GVTOP(GVArgs[1]))[0] &&
+ assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
"argv[0] was null after CreateArgv");
if (NumArgs > 2) {
std::vector<std::string> EnvVars;
///
ExecutionEngine *ExecutionEngine::create(ModuleProvider *MP,
bool ForceInterpreter,
- std::string *ErrorStr) {
+ std::string *ErrorStr,
+ CodeGenOpt::Level OptLevel) {
ExecutionEngine *EE = 0;
+ // Make sure we can resolve symbols in the program as well. The zero arg
+ // to the function tells DynamicLibrary to load the program, not a library.
+ if (sys::DynamicLibrary::LoadLibraryPermanently(0, ErrorStr))
+ return 0;
+
// Unless the interpreter was explicitly selected, try making a JIT.
if (!ForceInterpreter && JITCtor)
- EE = JITCtor(MP, ErrorStr);
+ EE = JITCtor(MP, ErrorStr, OptLevel);
// If we can't make a JIT, make an interpreter instead.
if (EE == 0 && InterpCtor)
- EE = InterpCtor(MP, ErrorStr);
-
- if (EE) {
- // Make sure we can resolve symbols in the program as well. The zero arg
- // to the function tells DynamicLibrary to load the program, not a library.
- try {
- sys::DynamicLibrary::LoadLibraryPermanently(0);
- } catch (...) {
- }
- }
+ EE = InterpCtor(MP, ErrorStr, OptLevel);
return EE;
}
+ExecutionEngine *ExecutionEngine::create(Module *M) {
+ return create(new ExistingModuleProvider(M));
+}
+
/// getPointerToGlobal - This returns the address of the specified global
/// value. This may involve code generation if it's a function.
///
/// This function converts a Constant* into a GenericValue. The interesting
/// part is if C is a ConstantExpr.
-/// @brief Get a GenericValue for a Constnat*
+/// @brief Get a GenericValue for a Constant*
GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
// If its undefined, return the garbage.
if (isa<UndefValue>(C))
return GV;
}
case Instruction::FPTrunc: {
+ // FIXME long double
GenericValue GV = getConstantValue(Op0);
GV.FloatVal = float(GV.DoubleVal);
return GV;
}
case Instruction::FPExt:{
+ // FIXME long double
GenericValue GV = getConstantValue(Op0);
GV.DoubleVal = double(GV.FloatVal);
return GV;
GenericValue GV = getConstantValue(Op0);
if (CE->getType() == Type::FloatTy)
GV.FloatVal = float(GV.IntVal.roundToDouble());
- else
+ else if (CE->getType() == Type::DoubleTy)
GV.DoubleVal = GV.IntVal.roundToDouble();
+ else if (CE->getType() == Type::X86_FP80Ty) {
+ const uint64_t zero[] = {0, 0};
+ APFloat apf = APFloat(APInt(80, 2, zero));
+ (void)apf.convertFromAPInt(GV.IntVal,
+ false,
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apf.bitcastToAPInt();
+ }
return GV;
}
case Instruction::SIToFP: {
GenericValue GV = getConstantValue(Op0);
if (CE->getType() == Type::FloatTy)
GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
- else
+ else if (CE->getType() == Type::DoubleTy)
GV.DoubleVal = GV.IntVal.signedRoundToDouble();
+ else if (CE->getType() == Type::X86_FP80Ty) {
+ const uint64_t zero[] = { 0, 0};
+ APFloat apf = APFloat(APInt(80, 2, zero));
+ (void)apf.convertFromAPInt(GV.IntVal,
+ true,
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apf.bitcastToAPInt();
+ }
return GV;
}
case Instruction::FPToUI: // double->APInt conversion handles sign
uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
if (Op0->getType() == Type::FloatTy)
GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
- else
+ else if (Op0->getType() == Type::DoubleTy)
GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
+ else if (Op0->getType() == Type::X86_FP80Ty) {
+ APFloat apf = APFloat(GV.IntVal);
+ uint64_t v;
+ bool ignored;
+ (void)apf.convertToInteger(&v, BitWidth,
+ CE->getOpcode()==Instruction::FPToSI,
+ APFloat::rmTowardZero, &ignored);
+ GV.IntVal = v; // endian?
+ }
return GV;
}
case Instruction::PtrToInt: {
GV.DoubleVal = ::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
}
break;
+ case Type::X86_FP80TyID:
+ case Type::PPC_FP128TyID:
+ case Type::FP128TyID: {
+ APFloat apfLHS = APFloat(LHS.IntVal);
+ switch (CE->getOpcode()) {
+ default: assert(0 && "Invalid long double opcode"); abort();
+ case Instruction::Add:
+ apfLHS.add(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::Sub:
+ apfLHS.subtract(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::Mul:
+ apfLHS.multiply(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::FDiv:
+ apfLHS.divide(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::FRem:
+ apfLHS.mod(APFloat(RHS.IntVal), APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ }
+ }
+ break;
}
return GV;
}
GenericValue Result;
switch (C->getType()->getTypeID()) {
case Type::FloatTyID:
- Result.FloatVal = (float)cast<ConstantFP>(C)->getValue();
+ Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
break;
case Type::DoubleTyID:
- Result.DoubleVal = (double)cast<ConstantFP>(C)->getValue();
+ Result.DoubleVal = cast<ConstantFP>(C)->getValueAPF().convertToDouble();
+ break;
+ case Type::X86_FP80TyID:
+ case Type::FP128TyID:
+ case Type::PPC_FP128TyID:
+ Result.IntVal = cast <ConstantFP>(C)->getValueAPF().bitcastToAPInt();
break;
case Type::IntegerTyID:
Result.IntVal = cast<ConstantInt>(C)->getValue();
return Result;
}
+/// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
+/// with the integer held in IntVal.
+static void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst,
+ unsigned StoreBytes) {
+ assert((IntVal.getBitWidth()+7)/8 >= StoreBytes && "Integer too small!");
+ uint8_t *Src = (uint8_t *)IntVal.getRawData();
+
+ if (sys::isLittleEndianHost())
+ // Little-endian host - the source is ordered from LSB to MSB. Order the
+ // destination from LSB to MSB: Do a straight copy.
+ memcpy(Dst, Src, StoreBytes);
+ else {
+ // Big-endian host - the source is an array of 64 bit words ordered from
+ // LSW to MSW. Each word is ordered from MSB to LSB. Order the destination
+ // from MSB to LSB: Reverse the word order, but not the bytes in a word.
+ while (StoreBytes > sizeof(uint64_t)) {
+ StoreBytes -= sizeof(uint64_t);
+ // May not be aligned so use memcpy.
+ memcpy(Dst + StoreBytes, Src, sizeof(uint64_t));
+ Src += sizeof(uint64_t);
+ }
+
+ memcpy(Dst, Src + sizeof(uint64_t) - StoreBytes, StoreBytes);
+ }
+}
+
/// StoreValueToMemory - Stores the data in Val of type Ty at address Ptr. Ptr
/// is the address of the memory at which to store Val, cast to GenericValue *.
/// It is not a pointer to a GenericValue containing the address at which to
/// store Val.
-///
-void ExecutionEngine::StoreValueToMemory(const GenericValue &Val, GenericValue *Ptr,
- const Type *Ty) {
+void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
+ GenericValue *Ptr, const Type *Ty) {
+ const unsigned StoreBytes = getTargetData()->getTypeStoreSize(Ty);
+
switch (Ty->getTypeID()) {
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
- GenericValue TmpVal = Val;
- if (BitWidth <= 8)
- *((uint8_t*)Ptr) = uint8_t(Val.IntVal.getZExtValue());
- else if (BitWidth <= 16) {
- *((uint16_t*)Ptr) = uint16_t(Val.IntVal.getZExtValue());
- } else if (BitWidth <= 32) {
- *((uint32_t*)Ptr) = uint32_t(Val.IntVal.getZExtValue());
- } else if (BitWidth <= 64) {
- *((uint64_t*)Ptr) = uint64_t(Val.IntVal.getZExtValue());
- } else {
- uint64_t *Dest = (uint64_t*)Ptr;
- const uint64_t *Src = Val.IntVal.getRawData();
- for (uint32_t i = 0; i < Val.IntVal.getNumWords(); ++i)
- Dest[i] = Src[i];
- }
+ case Type::IntegerTyID:
+ StoreIntToMemory(Val.IntVal, (uint8_t*)Ptr, StoreBytes);
break;
- }
case Type::FloatTyID:
*((float*)Ptr) = Val.FloatVal;
break;
case Type::DoubleTyID:
*((double*)Ptr) = Val.DoubleVal;
break;
- case Type::PointerTyID:
+ case Type::X86_FP80TyID:
+ memcpy(Ptr, Val.IntVal.getRawData(), 10);
+ break;
+ case Type::PointerTyID:
+ // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.
+ if (StoreBytes != sizeof(PointerTy))
+ memset(Ptr, 0, StoreBytes);
+
*((PointerTy*)Ptr) = Val.PointerVal;
break;
default:
cerr << "Cannot store value of type " << *Ty << "!\n";
}
+
+ if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian())
+ // Host and target are different endian - reverse the stored bytes.
+ std::reverse((uint8_t*)Ptr, StoreBytes + (uint8_t*)Ptr);
+}
+
+/// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
+/// from Src into IntVal, which is assumed to be wide enough and to hold zero.
+static void LoadIntFromMemory(APInt &IntVal, uint8_t *Src, unsigned LoadBytes) {
+ assert((IntVal.getBitWidth()+7)/8 >= LoadBytes && "Integer too small!");
+ uint8_t *Dst = (uint8_t *)IntVal.getRawData();
+
+ if (sys::isLittleEndianHost())
+ // Little-endian host - the destination must be ordered from LSB to MSB.
+ // The source is ordered from LSB to MSB: Do a straight copy.
+ memcpy(Dst, Src, LoadBytes);
+ else {
+ // Big-endian - the destination is an array of 64 bit words ordered from
+ // LSW to MSW. Each word must be ordered from MSB to LSB. The source is
+ // ordered from MSB to LSB: Reverse the word order, but not the bytes in
+ // a word.
+ while (LoadBytes > sizeof(uint64_t)) {
+ LoadBytes -= sizeof(uint64_t);
+ // May not be aligned so use memcpy.
+ memcpy(Dst, Src + LoadBytes, sizeof(uint64_t));
+ Dst += sizeof(uint64_t);
+ }
+
+ memcpy(Dst + sizeof(uint64_t) - LoadBytes, Src, LoadBytes);
+ }
}
/// FIXME: document
///
-void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
- GenericValue *Ptr,
- const Type *Ty) {
+void ExecutionEngine::LoadValueFromMemory(GenericValue &Result,
+ GenericValue *Ptr,
+ const Type *Ty) {
+ const unsigned LoadBytes = getTargetData()->getTypeStoreSize(Ty);
+
+ if (sys::isLittleEndianHost() != getTargetData()->isLittleEndian()) {
+ // Host and target are different endian - reverse copy the stored
+ // bytes into a buffer, and load from that.
+ uint8_t *Src = (uint8_t*)Ptr;
+ uint8_t *Buf = (uint8_t*)alloca(LoadBytes);
+ std::reverse_copy(Src, Src + LoadBytes, Buf);
+ Ptr = (GenericValue*)Buf;
+ }
+
switch (Ty->getTypeID()) {
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(Ty)->getBitWidth();
- if (BitWidth <= 8)
- Result.IntVal = APInt(BitWidth, *((uint8_t*)Ptr));
- else if (BitWidth <= 16) {
- Result.IntVal = APInt(BitWidth, *((uint16_t*)Ptr));
- } else if (BitWidth <= 32) {
- Result.IntVal = APInt(BitWidth, *((uint32_t*)Ptr));
- } else if (BitWidth <= 64) {
- Result.IntVal = APInt(BitWidth, *((uint64_t*)Ptr));
- } else
- Result.IntVal = APInt(BitWidth, (BitWidth+63)/64, (uint64_t*)Ptr);
+ case Type::IntegerTyID:
+ // An APInt with all words initially zero.
+ Result.IntVal = APInt(cast<IntegerType>(Ty)->getBitWidth(), 0);
+ LoadIntFromMemory(Result.IntVal, (uint8_t*)Ptr, LoadBytes);
break;
- }
case Type::FloatTyID:
Result.FloatVal = *((float*)Ptr);
break;
case Type::DoubleTyID:
- Result.DoubleVal = *((double*)Ptr);
+ Result.DoubleVal = *((double*)Ptr);
break;
- case Type::PointerTyID:
+ case Type::PointerTyID:
Result.PointerVal = *((PointerTy*)Ptr);
break;
+ case Type::X86_FP80TyID: {
+ // This is endian dependent, but it will only work on x86 anyway.
+ // FIXME: Will not trap if loading a signaling NaN.
+ uint64_t y[2];
+ memcpy(y, Ptr, 10);
+ Result.IntVal = APInt(80, 2, y);
+ break;
+ }
default:
cerr << "Cannot load value of type " << *Ty << "!\n";
abort();
// specified memory location...
//
void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
+ DOUT << "JIT: Initializing " << Addr << " ";
+ DEBUG(Init->dump());
if (isa<UndefValue>(Init)) {
return;
} else if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
unsigned ElementSize =
- getTargetData()->getTypeSize(CP->getType()->getElementType());
+ getTargetData()->getTypeAllocSize(CP->getType()->getElementType());
for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
return;
- } else if (Init->getType()->isFirstClassType()) {
- GenericValue Val = getConstantValue(Init);
- StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
- return;
} else if (isa<ConstantAggregateZero>(Init)) {
- memset(Addr, 0, (size_t)getTargetData()->getTypeSize(Init->getType()));
+ memset(Addr, 0, (size_t)getTargetData()->getTypeAllocSize(Init->getType()));
return;
- }
-
- switch (Init->getType()->getTypeID()) {
- case Type::ArrayTyID: {
- const ConstantArray *CPA = cast<ConstantArray>(Init);
+ } else if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
unsigned ElementSize =
- getTargetData()->getTypeSize(CPA->getType()->getElementType());
+ getTargetData()->getTypeAllocSize(CPA->getType()->getElementType());
for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
return;
- }
-
- case Type::StructTyID: {
- const ConstantStruct *CPS = cast<ConstantStruct>(Init);
+ } else if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
const StructLayout *SL =
getTargetData()->getStructLayout(cast<StructType>(CPS->getType()));
for (unsigned i = 0, e = CPS->getNumOperands(); i != e; ++i)
InitializeMemory(CPS->getOperand(i), (char*)Addr+SL->getElementOffset(i));
return;
+ } else if (Init->getType()->isFirstClassType()) {
+ GenericValue Val = getConstantValue(Init);
+ StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
+ return;
}
- default:
- cerr << "Bad Type: " << *Init->getType() << "\n";
- assert(0 && "Unknown constant type to initialize memory with!");
- }
+ cerr << "Bad Type: " << *Init->getType() << "\n";
+ assert(0 && "Unknown constant type to initialize memory with!");
}
/// EmitGlobals - Emit all of the global variables to memory, storing their
/// their initializers into the memory.
///
void ExecutionEngine::emitGlobals() {
- const TargetData *TD = getTargetData();
// Loop over all of the global variables in the program, allocating the memory
// to hold them. If there is more than one module, do a prepass over globals
for (Module::const_global_iterator I = M.global_begin(),
E = M.global_end(); I != E; ++I) {
const GlobalValue *GV = I;
- if (GV->hasInternalLinkage() || GV->isDeclaration() ||
+ if (GV->hasLocalLinkage() || GV->isDeclaration() ||
GV->hasAppendingLinkage() || !GV->hasName())
continue;// Ignore external globals and globals with internal linkage.
continue;
// Otherwise, we know it's linkonce/weak, replace it if this is a strong
- // symbol.
+ // symbol. FIXME is this right for common?
if (GV->hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
GVEntry = GV;
}
}
if (!I->isDeclaration()) {
- // Get the type of the global.
- const Type *Ty = I->getType()->getElementType();
-
- // Allocate some memory for it!
- unsigned Size = TD->getTypeSize(Ty);
- addGlobalMapping(I, new char[Size]);
+ addGlobalMapping(I, getMemoryForGV(I));
} else {
// External variable reference. Try to use the dynamic loader to
// get a pointer to it.
LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
void *Ptr = getPointerToGlobalIfAvailable(CGV);
assert(Ptr && "Canonical global wasn't codegen'd!");
- addGlobalMapping(GV, getPointerToGlobalIfAvailable(CGV));
+ addGlobalMapping(GV, Ptr);
}
}
// already in the map.
void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
void *GA = getPointerToGlobalIfAvailable(GV);
- DOUT << "Global '" << GV->getName() << "' -> " << GA << "\n";
- const Type *ElTy = GV->getType()->getElementType();
- size_t GVSize = (size_t)getTargetData()->getTypeSize(ElTy);
if (GA == 0) {
// If it's not already specified, allocate memory for the global.
- GA = new char[GVSize];
+ GA = getMemoryForGV(GV);
addGlobalMapping(GV, GA);
}
-
- InitializeMemory(GV->getInitializer(), GA);
+
+ // Don't initialize if it's thread local, let the client do it.
+ if (!GV->isThreadLocal())
+ InitializeMemory(GV->getInitializer(), GA);
+
+ const Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)getTargetData()->getTypeAllocSize(ElTy);
NumInitBytes += (unsigned)GVSize;
++NumGlobals;
}
projects / oota-llvm.git / blobdiff