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-rw-r--r--contrib/llvm/lib/ExecutionEngine/ExecutionEngine.cpp1348
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diff --git a/contrib/llvm/lib/ExecutionEngine/ExecutionEngine.cpp b/contrib/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
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+++ b/contrib/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
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+//===-- ExecutionEngine.cpp - Common Implementation shared by EEs ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the common interface used by the various execution engine
+// subclasses.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ExecutionEngine/JITEventListener.h"
+#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Operator.h"
+#include "llvm/IR/ValueHandle.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/MutexGuard.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetMachine.h"
+#include <cmath>
+#include <cstring>
+using namespace llvm;
+
+#define DEBUG_TYPE "jit"
+
+STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
+STATISTIC(NumGlobals , "Number of global vars initialized");
+
+ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
+ std::unique_ptr<Module> M, std::string *ErrorStr,
+ std::shared_ptr<MCJITMemoryManager> MemMgr,
+ std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver,
+ std::unique_ptr<TargetMachine> TM) = nullptr;
+
+ExecutionEngine *(*ExecutionEngine::OrcMCJITReplacementCtor)(
+ std::string *ErrorStr, std::shared_ptr<MCJITMemoryManager> MemMgr,
+ std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver,
+ std::unique_ptr<TargetMachine> TM) = nullptr;
+
+ExecutionEngine *(*ExecutionEngine::InterpCtor)(std::unique_ptr<Module> M,
+ std::string *ErrorStr) =nullptr;
+
+void JITEventListener::anchor() {}
+
+ExecutionEngine::ExecutionEngine(std::unique_ptr<Module> M)
+ : LazyFunctionCreator(nullptr) {
+ CompilingLazily = false;
+ GVCompilationDisabled = false;
+ SymbolSearchingDisabled = false;
+
+ // IR module verification is enabled by default in debug builds, and disabled
+ // by default in release builds.
+#ifndef NDEBUG
+ VerifyModules = true;
+#else
+ VerifyModules = false;
+#endif
+
+ assert(M && "Module is null?");
+ Modules.push_back(std::move(M));
+}
+
+ExecutionEngine::~ExecutionEngine() {
+ clearAllGlobalMappings();
+}
+
+namespace {
+/// \brief Helper class which uses a value handler to automatically deletes the
+/// memory block when the GlobalVariable is destroyed.
+class GVMemoryBlock : public CallbackVH {
+ GVMemoryBlock(const GlobalVariable *GV)
+ : CallbackVH(const_cast<GlobalVariable*>(GV)) {}
+
+public:
+ /// \brief Returns the address the GlobalVariable should be written into. The
+ /// GVMemoryBlock object prefixes that.
+ static char *Create(const GlobalVariable *GV, const DataLayout& TD) {
+ Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
+ void *RawMemory = ::operator new(
+ RoundUpToAlignment(sizeof(GVMemoryBlock),
+ TD.getPreferredAlignment(GV))
+ + GVSize);
+ new(RawMemory) GVMemoryBlock(GV);
+ return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
+ }
+
+ void deleted() override {
+ // We allocated with operator new and with some extra memory hanging off the
+ // end, so don't just delete this. I'm not sure if this is actually
+ // required.
+ this->~GVMemoryBlock();
+ ::operator delete(this);
+ }
+};
+} // anonymous namespace
+
+char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
+ return GVMemoryBlock::Create(GV, *getDataLayout());
+}
+
+void ExecutionEngine::addObjectFile(std::unique_ptr<object::ObjectFile> O) {
+ llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
+}
+
+void
+ExecutionEngine::addObjectFile(object::OwningBinary<object::ObjectFile> O) {
+ llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
+}
+
+void ExecutionEngine::addArchive(object::OwningBinary<object::Archive> A) {
+ llvm_unreachable("ExecutionEngine subclass doesn't implement addArchive.");
+}
+
+bool ExecutionEngine::removeModule(Module *M) {
+ for (auto I = Modules.begin(), E = Modules.end(); I != E; ++I) {
+ Module *Found = I->get();
+ if (Found == M) {
+ I->release();
+ Modules.erase(I);
+ clearGlobalMappingsFromModule(M);
+ return true;
+ }
+ }
+ return false;
+}
+
+Function *ExecutionEngine::FindFunctionNamed(const char *FnName) {
+ for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
+ Function *F = Modules[i]->getFunction(FnName);
+ if (F && !F->isDeclaration())
+ return F;
+ }
+ return nullptr;
+}
+
+GlobalVariable *ExecutionEngine::FindGlobalVariableNamed(const char *Name, bool AllowInternal) {
+ for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
+ GlobalVariable *GV = Modules[i]->getGlobalVariable(Name,AllowInternal);
+ if (GV && !GV->isDeclaration())
+ return GV;
+ }
+ return nullptr;
+}
+
+uint64_t ExecutionEngineState::RemoveMapping(StringRef Name) {
+ GlobalAddressMapTy::iterator I = GlobalAddressMap.find(Name);
+ uint64_t OldVal;
+
+ // FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
+ // GlobalAddressMap.
+ if (I == GlobalAddressMap.end())
+ OldVal = 0;
+ else {
+ GlobalAddressReverseMap.erase(I->second);
+ OldVal = I->second;
+ GlobalAddressMap.erase(I);
+ }
+
+ return OldVal;
+}
+
+std::string ExecutionEngine::getMangledName(const GlobalValue *GV) {
+ MutexGuard locked(lock);
+ Mangler Mang;
+ SmallString<128> FullName;
+ Mang.getNameWithPrefix(FullName, GV, false);
+ return FullName.str();
+}
+
+void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
+ MutexGuard locked(lock);
+ addGlobalMapping(getMangledName(GV), (uint64_t) Addr);
+}
+
+void ExecutionEngine::addGlobalMapping(StringRef Name, uint64_t Addr) {
+ MutexGuard locked(lock);
+
+ assert(!Name.empty() && "Empty GlobalMapping symbol name!");
+
+ DEBUG(dbgs() << "JIT: Map \'" << Name << "\' to [" << Addr << "]\n";);
+ uint64_t &CurVal = EEState.getGlobalAddressMap()[Name];
+ assert((!CurVal || !Addr) && "GlobalMapping already established!");
+ CurVal = Addr;
+
+ // If we are using the reverse mapping, add it too.
+ if (!EEState.getGlobalAddressReverseMap().empty()) {
+ std::string &V = EEState.getGlobalAddressReverseMap()[CurVal];
+ assert((!V.empty() || !Name.empty()) &&
+ "GlobalMapping already established!");
+ V = Name;
+ }
+}
+
+void ExecutionEngine::clearAllGlobalMappings() {
+ MutexGuard locked(lock);
+
+ EEState.getGlobalAddressMap().clear();
+ EEState.getGlobalAddressReverseMap().clear();
+}
+
+void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
+ MutexGuard locked(lock);
+
+ for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI)
+ EEState.RemoveMapping(getMangledName(FI));
+ for (Module::global_iterator GI = M->global_begin(), GE = M->global_end();
+ GI != GE; ++GI)
+ EEState.RemoveMapping(getMangledName(GI));
+}
+
+uint64_t ExecutionEngine::updateGlobalMapping(const GlobalValue *GV,
+ void *Addr) {
+ MutexGuard locked(lock);
+ return updateGlobalMapping(getMangledName(GV), (uint64_t) Addr);
+}
+
+uint64_t ExecutionEngine::updateGlobalMapping(StringRef Name, uint64_t Addr) {
+ MutexGuard locked(lock);
+
+ ExecutionEngineState::GlobalAddressMapTy &Map =
+ EEState.getGlobalAddressMap();
+
+ // Deleting from the mapping?
+ if (!Addr)
+ return EEState.RemoveMapping(Name);
+
+ uint64_t &CurVal = Map[Name];
+ uint64_t OldVal = CurVal;
+
+ if (CurVal && !EEState.getGlobalAddressReverseMap().empty())
+ EEState.getGlobalAddressReverseMap().erase(CurVal);
+ CurVal = Addr;
+
+ // If we are using the reverse mapping, add it too.
+ if (!EEState.getGlobalAddressReverseMap().empty()) {
+ std::string &V = EEState.getGlobalAddressReverseMap()[CurVal];
+ assert((!V.empty() || !Name.empty()) &&
+ "GlobalMapping already established!");
+ V = Name;
+ }
+ return OldVal;
+}
+
+uint64_t ExecutionEngine::getAddressToGlobalIfAvailable(StringRef S) {
+ MutexGuard locked(lock);
+ uint64_t Address = 0;
+ ExecutionEngineState::GlobalAddressMapTy::iterator I =
+ EEState.getGlobalAddressMap().find(S);
+ if (I != EEState.getGlobalAddressMap().end())
+ Address = I->second;
+ return Address;
+}
+
+
+void *ExecutionEngine::getPointerToGlobalIfAvailable(StringRef S) {
+ MutexGuard locked(lock);
+ if (void* Address = (void *) getAddressToGlobalIfAvailable(S))
+ return Address;
+ return nullptr;
+}
+
+void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
+ MutexGuard locked(lock);
+ return getPointerToGlobalIfAvailable(getMangledName(GV));
+}
+
+const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
+ MutexGuard locked(lock);
+
+ // If we haven't computed the reverse mapping yet, do so first.
+ if (EEState.getGlobalAddressReverseMap().empty()) {
+ for (ExecutionEngineState::GlobalAddressMapTy::iterator
+ I = EEState.getGlobalAddressMap().begin(),
+ E = EEState.getGlobalAddressMap().end(); I != E; ++I) {
+ StringRef Name = I->first();
+ uint64_t Addr = I->second;
+ EEState.getGlobalAddressReverseMap().insert(std::make_pair(
+ Addr, Name));
+ }
+ }
+
+ std::map<uint64_t, std::string>::iterator I =
+ EEState.getGlobalAddressReverseMap().find((uint64_t) Addr);
+
+ if (I != EEState.getGlobalAddressReverseMap().end()) {
+ StringRef Name = I->second;
+ for (unsigned i = 0, e = Modules.size(); i != e; ++i)
+ if (GlobalValue *GV = Modules[i]->getNamedValue(Name))
+ return GV;
+ }
+ return nullptr;
+}
+
+namespace {
+class ArgvArray {
+ std::unique_ptr<char[]> Array;
+ std::vector<std::unique_ptr<char[]>> Values;
+public:
+ /// Turn a vector of strings into a nice argv style array of pointers to null
+ /// terminated strings.
+ void *reset(LLVMContext &C, ExecutionEngine *EE,
+ const std::vector<std::string> &InputArgv);
+};
+} // anonymous namespace
+void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
+ const std::vector<std::string> &InputArgv) {
+ Values.clear(); // Free the old contents.
+ Values.reserve(InputArgv.size());
+ unsigned PtrSize = EE->getDataLayout()->getPointerSize();
+ Array = make_unique<char[]>((InputArgv.size()+1)*PtrSize);
+
+ DEBUG(dbgs() << "JIT: ARGV = " << (void*)Array.get() << "\n");
+ Type *SBytePtr = Type::getInt8PtrTy(C);
+
+ for (unsigned i = 0; i != InputArgv.size(); ++i) {
+ unsigned Size = InputArgv[i].size()+1;
+ auto Dest = make_unique<char[]>(Size);
+ DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void*)Dest.get() << "\n");
+
+ std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest.get());
+ Dest[Size-1] = 0;
+
+ // Endian safe: Array[i] = (PointerTy)Dest;
+ EE->StoreValueToMemory(PTOGV(Dest.get()),
+ (GenericValue*)(&Array[i*PtrSize]), SBytePtr);
+ Values.push_back(std::move(Dest));
+ }
+
+ // Null terminate it
+ EE->StoreValueToMemory(PTOGV(nullptr),
+ (GenericValue*)(&Array[InputArgv.size()*PtrSize]),
+ SBytePtr);
+ return Array.get();
+}
+
+void ExecutionEngine::runStaticConstructorsDestructors(Module &module,
+ bool isDtors) {
+ const char *Name = isDtors ? "llvm.global_dtors" : "llvm.global_ctors";
+ 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 '{ i32, 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) {
+ ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i));
+ if (!CS) continue;
+
+ Constant *FP = CS->getOperand(1);
+ if (FP->isNullValue())
+ continue; // Found a sentinal value, ignore.
+
+ // Strip off constant expression casts.
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
+ if (CE->isCast())
+ FP = CE->getOperand(0);
+
+ // Execute the ctor/dtor function!
+ if (Function *F = dyn_cast<Function>(FP))
+ runFunction(F, None);
+
+ // FIXME: It is marginally lame that we just do nothing here if we see an
+ // entry we don't recognize. It might not be unreasonable for the verifier
+ // to not even allow this and just assert here.
+ }
+}
+
+void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
+ // Execute global ctors/dtors for each module in the program.
+ for (std::unique_ptr<Module> &M : Modules)
+ runStaticConstructorsDestructors(*M, isDtors);
+}
+
+#ifndef NDEBUG
+/// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
+static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
+ unsigned PtrSize = EE->getDataLayout()->getPointerSize();
+ for (unsigned i = 0; i < PtrSize; ++i)
+ if (*(i + (uint8_t*)Loc))
+ return false;
+ return true;
+}
+#endif
+
+int ExecutionEngine::runFunctionAsMain(Function *Fn,
+ const std::vector<std::string> &argv,
+ const char * const * envp) {
+ std::vector<GenericValue> GVArgs;
+ GenericValue GVArgc;
+ GVArgc.IntVal = APInt(32, argv.size());
+
+ // Check main() type
+ unsigned NumArgs = Fn->getFunctionType()->getNumParams();
+ FunctionType *FTy = Fn->getFunctionType();
+ Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
+
+ // Check the argument types.
+ if (NumArgs > 3)
+ report_fatal_error("Invalid number of arguments of main() supplied");
+ if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
+ report_fatal_error("Invalid type for third argument of main() supplied");
+ if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
+ report_fatal_error("Invalid type for second argument of main() supplied");
+ if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
+ report_fatal_error("Invalid type for first argument of main() supplied");
+ if (!FTy->getReturnType()->isIntegerTy() &&
+ !FTy->getReturnType()->isVoidTy())
+ report_fatal_error("Invalid return type of main() supplied");
+
+ ArgvArray CArgv;
+ ArgvArray CEnv;
+ if (NumArgs) {
+ GVArgs.push_back(GVArgc); // Arg #0 = argc.
+ if (NumArgs > 1) {
+ // Arg #1 = argv.
+ GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
+ assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
+ "argv[0] was null after CreateArgv");
+ if (NumArgs > 2) {
+ std::vector<std::string> EnvVars;
+ for (unsigned i = 0; envp[i]; ++i)
+ EnvVars.emplace_back(envp[i]);
+ // Arg #2 = envp.
+ GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
+ }
+ }
+ }
+
+ return runFunction(Fn, GVArgs).IntVal.getZExtValue();
+}
+
+EngineBuilder::EngineBuilder() : EngineBuilder(nullptr) {}
+
+EngineBuilder::EngineBuilder(std::unique_ptr<Module> M)
+ : M(std::move(M)), WhichEngine(EngineKind::Either), ErrorStr(nullptr),
+ OptLevel(CodeGenOpt::Default), MemMgr(nullptr), Resolver(nullptr),
+ RelocModel(Reloc::Default), CMModel(CodeModel::JITDefault),
+ UseOrcMCJITReplacement(false) {
+// IR module verification is enabled by default in debug builds, and disabled
+// by default in release builds.
+#ifndef NDEBUG
+ VerifyModules = true;
+#else
+ VerifyModules = false;
+#endif
+}
+
+EngineBuilder::~EngineBuilder() = default;
+
+EngineBuilder &EngineBuilder::setMCJITMemoryManager(
+ std::unique_ptr<RTDyldMemoryManager> mcjmm) {
+ auto SharedMM = std::shared_ptr<RTDyldMemoryManager>(std::move(mcjmm));
+ MemMgr = SharedMM;
+ Resolver = SharedMM;
+ return *this;
+}
+
+EngineBuilder&
+EngineBuilder::setMemoryManager(std::unique_ptr<MCJITMemoryManager> MM) {
+ MemMgr = std::shared_ptr<MCJITMemoryManager>(std::move(MM));
+ return *this;
+}
+
+EngineBuilder&
+EngineBuilder::setSymbolResolver(std::unique_ptr<RuntimeDyld::SymbolResolver> SR) {
+ Resolver = std::shared_ptr<RuntimeDyld::SymbolResolver>(std::move(SR));
+ return *this;
+}
+
+ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
+ std::unique_ptr<TargetMachine> TheTM(TM); // Take ownership.
+
+ // 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(nullptr, ErrorStr))
+ return nullptr;
+
+ // If the user specified a memory manager but didn't specify which engine to
+ // create, we assume they only want the JIT, and we fail if they only want
+ // the interpreter.
+ if (MemMgr) {
+ if (WhichEngine & EngineKind::JIT)
+ WhichEngine = EngineKind::JIT;
+ else {
+ if (ErrorStr)
+ *ErrorStr = "Cannot create an interpreter with a memory manager.";
+ return nullptr;
+ }
+ }
+
+ // Unless the interpreter was explicitly selected or the JIT is not linked,
+ // try making a JIT.
+ if ((WhichEngine & EngineKind::JIT) && TheTM) {
+ Triple TT(M->getTargetTriple());
+ if (!TM->getTarget().hasJIT()) {
+ errs() << "WARNING: This target JIT is not designed for the host"
+ << " you are running. If bad things happen, please choose"
+ << " a different -march switch.\n";
+ }
+
+ ExecutionEngine *EE = nullptr;
+ if (ExecutionEngine::OrcMCJITReplacementCtor && UseOrcMCJITReplacement) {
+ EE = ExecutionEngine::OrcMCJITReplacementCtor(ErrorStr, std::move(MemMgr),
+ std::move(Resolver),
+ std::move(TheTM));
+ EE->addModule(std::move(M));
+ } else if (ExecutionEngine::MCJITCtor)
+ EE = ExecutionEngine::MCJITCtor(std::move(M), ErrorStr, std::move(MemMgr),
+ std::move(Resolver), std::move(TheTM));
+
+ if (EE) {
+ EE->setVerifyModules(VerifyModules);
+ return EE;
+ }
+ }
+
+ // If we can't make a JIT and we didn't request one specifically, try making
+ // an interpreter instead.
+ if (WhichEngine & EngineKind::Interpreter) {
+ if (ExecutionEngine::InterpCtor)
+ return ExecutionEngine::InterpCtor(std::move(M), ErrorStr);
+ if (ErrorStr)
+ *ErrorStr = "Interpreter has not been linked in.";
+ return nullptr;
+ }
+
+ if ((WhichEngine & EngineKind::JIT) && !ExecutionEngine::MCJITCtor) {
+ if (ErrorStr)
+ *ErrorStr = "JIT has not been linked in.";
+ }
+
+ return nullptr;
+}
+
+void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
+ if (Function *F = const_cast<Function*>(dyn_cast<Function>(GV)))
+ return getPointerToFunction(F);
+
+ MutexGuard locked(lock);
+ if (void* P = getPointerToGlobalIfAvailable(GV))
+ return P;
+
+ // Global variable might have been added since interpreter started.
+ if (GlobalVariable *GVar =
+ const_cast<GlobalVariable *>(dyn_cast<GlobalVariable>(GV)))
+ EmitGlobalVariable(GVar);
+ else
+ llvm_unreachable("Global hasn't had an address allocated yet!");
+
+ return getPointerToGlobalIfAvailable(GV);
+}
+
+/// \brief Converts a Constant* into a GenericValue, including handling of
+/// ConstantExpr values.
+GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
+ // If its undefined, return the garbage.
+ if (isa<UndefValue>(C)) {
+ GenericValue Result;
+ switch (C->getType()->getTypeID()) {
+ default:
+ break;
+ case Type::IntegerTyID:
+ case Type::X86_FP80TyID:
+ case Type::FP128TyID:
+ case Type::PPC_FP128TyID:
+ // Although the value is undefined, we still have to construct an APInt
+ // with the correct bit width.
+ Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
+ break;
+ case Type::StructTyID: {
+ // if the whole struct is 'undef' just reserve memory for the value.
+ if(StructType *STy = dyn_cast<StructType>(C->getType())) {
+ unsigned int elemNum = STy->getNumElements();
+ Result.AggregateVal.resize(elemNum);
+ for (unsigned int i = 0; i < elemNum; ++i) {
+ Type *ElemTy = STy->getElementType(i);
+ if (ElemTy->isIntegerTy())
+ Result.AggregateVal[i].IntVal =
+ APInt(ElemTy->getPrimitiveSizeInBits(), 0);
+ else if (ElemTy->isAggregateType()) {
+ const Constant *ElemUndef = UndefValue::get(ElemTy);
+ Result.AggregateVal[i] = getConstantValue(ElemUndef);
+ }
+ }
+ }
+ }
+ break;
+ case Type::VectorTyID:
+ // if the whole vector is 'undef' just reserve memory for the value.
+ const VectorType* VTy = dyn_cast<VectorType>(C->getType());
+ const Type *ElemTy = VTy->getElementType();
+ unsigned int elemNum = VTy->getNumElements();
+ Result.AggregateVal.resize(elemNum);
+ if (ElemTy->isIntegerTy())
+ for (unsigned int i = 0; i < elemNum; ++i)
+ Result.AggregateVal[i].IntVal =
+ APInt(ElemTy->getPrimitiveSizeInBits(), 0);
+ break;
+ }
+ return Result;
+ }
+
+ // Otherwise, if the value is a ConstantExpr...
+ if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
+ Constant *Op0 = CE->getOperand(0);
+ switch (CE->getOpcode()) {
+ case Instruction::GetElementPtr: {
+ // Compute the index
+ GenericValue Result = getConstantValue(Op0);
+ APInt Offset(DL->getPointerSizeInBits(), 0);
+ cast<GEPOperator>(CE)->accumulateConstantOffset(*DL, Offset);
+
+ char* tmp = (char*) Result.PointerVal;
+ Result = PTOGV(tmp + Offset.getSExtValue());
+ return Result;
+ }
+ case Instruction::Trunc: {
+ GenericValue GV = getConstantValue(Op0);
+ uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
+ GV.IntVal = GV.IntVal.trunc(BitWidth);
+ return GV;
+ }
+ case Instruction::ZExt: {
+ GenericValue GV = getConstantValue(Op0);
+ uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
+ GV.IntVal = GV.IntVal.zext(BitWidth);
+ return GV;
+ }
+ case Instruction::SExt: {
+ GenericValue GV = getConstantValue(Op0);
+ uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
+ GV.IntVal = GV.IntVal.sext(BitWidth);
+ 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;
+ }
+ case Instruction::UIToFP: {
+ GenericValue GV = getConstantValue(Op0);
+ if (CE->getType()->isFloatTy())
+ GV.FloatVal = float(GV.IntVal.roundToDouble());
+ else if (CE->getType()->isDoubleTy())
+ GV.DoubleVal = GV.IntVal.roundToDouble();
+ else if (CE->getType()->isX86_FP80Ty()) {
+ APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
+ (void)apf.convertFromAPInt(GV.IntVal,
+ false,
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apf.bitcastToAPInt();
+ }
+ return GV;
+ }
+ case Instruction::SIToFP: {
+ GenericValue GV = getConstantValue(Op0);
+ if (CE->getType()->isFloatTy())
+ GV.FloatVal = float(GV.IntVal.signedRoundToDouble());
+ else if (CE->getType()->isDoubleTy())
+ GV.DoubleVal = GV.IntVal.signedRoundToDouble();
+ else if (CE->getType()->isX86_FP80Ty()) {
+ APFloat apf = APFloat::getZero(APFloat::x87DoubleExtended);
+ (void)apf.convertFromAPInt(GV.IntVal,
+ true,
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apf.bitcastToAPInt();
+ }
+ return GV;
+ }
+ case Instruction::FPToUI: // double->APInt conversion handles sign
+ case Instruction::FPToSI: {
+ GenericValue GV = getConstantValue(Op0);
+ uint32_t BitWidth = cast<IntegerType>(CE->getType())->getBitWidth();
+ if (Op0->getType()->isFloatTy())
+ GV.IntVal = APIntOps::RoundFloatToAPInt(GV.FloatVal, BitWidth);
+ else if (Op0->getType()->isDoubleTy())
+ GV.IntVal = APIntOps::RoundDoubleToAPInt(GV.DoubleVal, BitWidth);
+ else if (Op0->getType()->isX86_FP80Ty()) {
+ APFloat apf = APFloat(APFloat::x87DoubleExtended, 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: {
+ GenericValue GV = getConstantValue(Op0);
+ uint32_t PtrWidth = DL->getTypeSizeInBits(Op0->getType());
+ assert(PtrWidth <= 64 && "Bad pointer width");
+ GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
+ uint32_t IntWidth = DL->getTypeSizeInBits(CE->getType());
+ GV.IntVal = GV.IntVal.zextOrTrunc(IntWidth);
+ return GV;
+ }
+ case Instruction::IntToPtr: {
+ GenericValue GV = getConstantValue(Op0);
+ uint32_t PtrWidth = DL->getTypeSizeInBits(CE->getType());
+ GV.IntVal = GV.IntVal.zextOrTrunc(PtrWidth);
+ assert(GV.IntVal.getBitWidth() <= 64 && "Bad pointer width");
+ GV.PointerVal = PointerTy(uintptr_t(GV.IntVal.getZExtValue()));
+ return GV;
+ }
+ case Instruction::BitCast: {
+ GenericValue GV = getConstantValue(Op0);
+ Type* DestTy = CE->getType();
+ switch (Op0->getType()->getTypeID()) {
+ default: llvm_unreachable("Invalid bitcast operand");
+ case Type::IntegerTyID:
+ assert(DestTy->isFloatingPointTy() && "invalid bitcast");
+ if (DestTy->isFloatTy())
+ GV.FloatVal = GV.IntVal.bitsToFloat();
+ else if (DestTy->isDoubleTy())
+ GV.DoubleVal = GV.IntVal.bitsToDouble();
+ break;
+ case Type::FloatTyID:
+ assert(DestTy->isIntegerTy(32) && "Invalid bitcast");
+ GV.IntVal = APInt::floatToBits(GV.FloatVal);
+ break;
+ case Type::DoubleTyID:
+ assert(DestTy->isIntegerTy(64) && "Invalid bitcast");
+ GV.IntVal = APInt::doubleToBits(GV.DoubleVal);
+ break;
+ case Type::PointerTyID:
+ assert(DestTy->isPointerTy() && "Invalid bitcast");
+ break; // getConstantValue(Op0) above already converted it
+ }
+ return GV;
+ }
+ case Instruction::Add:
+ case Instruction::FAdd:
+ case Instruction::Sub:
+ case Instruction::FSub:
+ case Instruction::Mul:
+ case Instruction::FMul:
+ case Instruction::UDiv:
+ case Instruction::SDiv:
+ case Instruction::URem:
+ case Instruction::SRem:
+ case Instruction::And:
+ case Instruction::Or:
+ case Instruction::Xor: {
+ GenericValue LHS = getConstantValue(Op0);
+ GenericValue RHS = getConstantValue(CE->getOperand(1));
+ GenericValue GV;
+ switch (CE->getOperand(0)->getType()->getTypeID()) {
+ default: llvm_unreachable("Bad add type!");
+ case Type::IntegerTyID:
+ switch (CE->getOpcode()) {
+ default: llvm_unreachable("Invalid integer opcode");
+ case Instruction::Add: GV.IntVal = LHS.IntVal + RHS.IntVal; break;
+ case Instruction::Sub: GV.IntVal = LHS.IntVal - RHS.IntVal; break;
+ case Instruction::Mul: GV.IntVal = LHS.IntVal * RHS.IntVal; break;
+ case Instruction::UDiv:GV.IntVal = LHS.IntVal.udiv(RHS.IntVal); break;
+ case Instruction::SDiv:GV.IntVal = LHS.IntVal.sdiv(RHS.IntVal); break;
+ case Instruction::URem:GV.IntVal = LHS.IntVal.urem(RHS.IntVal); break;
+ case Instruction::SRem:GV.IntVal = LHS.IntVal.srem(RHS.IntVal); break;
+ case Instruction::And: GV.IntVal = LHS.IntVal & RHS.IntVal; break;
+ case Instruction::Or: GV.IntVal = LHS.IntVal | RHS.IntVal; break;
+ case Instruction::Xor: GV.IntVal = LHS.IntVal ^ RHS.IntVal; break;
+ }
+ break;
+ case Type::FloatTyID:
+ switch (CE->getOpcode()) {
+ default: llvm_unreachable("Invalid float opcode");
+ case Instruction::FAdd:
+ GV.FloatVal = LHS.FloatVal + RHS.FloatVal; break;
+ case Instruction::FSub:
+ GV.FloatVal = LHS.FloatVal - RHS.FloatVal; break;
+ case Instruction::FMul:
+ GV.FloatVal = LHS.FloatVal * RHS.FloatVal; break;
+ case Instruction::FDiv:
+ GV.FloatVal = LHS.FloatVal / RHS.FloatVal; break;
+ case Instruction::FRem:
+ GV.FloatVal = std::fmod(LHS.FloatVal,RHS.FloatVal); break;
+ }
+ break;
+ case Type::DoubleTyID:
+ switch (CE->getOpcode()) {
+ default: llvm_unreachable("Invalid double opcode");
+ case Instruction::FAdd:
+ GV.DoubleVal = LHS.DoubleVal + RHS.DoubleVal; break;
+ case Instruction::FSub:
+ GV.DoubleVal = LHS.DoubleVal - RHS.DoubleVal; break;
+ case Instruction::FMul:
+ GV.DoubleVal = LHS.DoubleVal * RHS.DoubleVal; break;
+ case Instruction::FDiv:
+ GV.DoubleVal = LHS.DoubleVal / RHS.DoubleVal; break;
+ case Instruction::FRem:
+ GV.DoubleVal = std::fmod(LHS.DoubleVal,RHS.DoubleVal); break;
+ }
+ break;
+ case Type::X86_FP80TyID:
+ case Type::PPC_FP128TyID:
+ case Type::FP128TyID: {
+ const fltSemantics &Sem = CE->getOperand(0)->getType()->getFltSemantics();
+ APFloat apfLHS = APFloat(Sem, LHS.IntVal);
+ switch (CE->getOpcode()) {
+ default: llvm_unreachable("Invalid long double opcode");
+ case Instruction::FAdd:
+ apfLHS.add(APFloat(Sem, RHS.IntVal), APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::FSub:
+ apfLHS.subtract(APFloat(Sem, RHS.IntVal),
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::FMul:
+ apfLHS.multiply(APFloat(Sem, RHS.IntVal),
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::FDiv:
+ apfLHS.divide(APFloat(Sem, RHS.IntVal),
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ case Instruction::FRem:
+ apfLHS.mod(APFloat(Sem, RHS.IntVal),
+ APFloat::rmNearestTiesToEven);
+ GV.IntVal = apfLHS.bitcastToAPInt();
+ break;
+ }
+ }
+ break;
+ }
+ return GV;
+ }
+ default:
+ break;
+ }
+
+ SmallString<256> Msg;
+ raw_svector_ostream OS(Msg);
+ OS << "ConstantExpr not handled: " << *CE;
+ report_fatal_error(OS.str());
+ }
+
+ // Otherwise, we have a simple constant.
+ GenericValue Result;
+ switch (C->getType()->getTypeID()) {
+ case Type::FloatTyID:
+ Result.FloatVal = cast<ConstantFP>(C)->getValueAPF().convertToFloat();
+ break;
+ case Type::DoubleTyID:
+ 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();
+ break;
+ case Type::PointerTyID:
+ if (isa<ConstantPointerNull>(C))
+ Result.PointerVal = nullptr;
+ else if (const Function *F = dyn_cast<Function>(C))
+ Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
+ else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
+ Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
+ else
+ llvm_unreachable("Unknown constant pointer type!");
+ break;
+ case Type::VectorTyID: {
+ unsigned elemNum;
+ Type* ElemTy;
+ const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(C);
+ const ConstantVector *CV = dyn_cast<ConstantVector>(C);
+ const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(C);
+
+ if (CDV) {
+ elemNum = CDV->getNumElements();
+ ElemTy = CDV->getElementType();
+ } else if (CV || CAZ) {
+ VectorType* VTy = dyn_cast<VectorType>(C->getType());
+ elemNum = VTy->getNumElements();
+ ElemTy = VTy->getElementType();
+ } else {
+ llvm_unreachable("Unknown constant vector type!");
+ }
+
+ Result.AggregateVal.resize(elemNum);
+ // Check if vector holds floats.
+ if(ElemTy->isFloatTy()) {
+ if (CAZ) {
+ GenericValue floatZero;
+ floatZero.FloatVal = 0.f;
+ std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
+ floatZero);
+ break;
+ }
+ if(CV) {
+ for (unsigned i = 0; i < elemNum; ++i)
+ if (!isa<UndefValue>(CV->getOperand(i)))
+ Result.AggregateVal[i].FloatVal = cast<ConstantFP>(
+ CV->getOperand(i))->getValueAPF().convertToFloat();
+ break;
+ }
+ if(CDV)
+ for (unsigned i = 0; i < elemNum; ++i)
+ Result.AggregateVal[i].FloatVal = CDV->getElementAsFloat(i);
+
+ break;
+ }
+ // Check if vector holds doubles.
+ if (ElemTy->isDoubleTy()) {
+ if (CAZ) {
+ GenericValue doubleZero;
+ doubleZero.DoubleVal = 0.0;
+ std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
+ doubleZero);
+ break;
+ }
+ if(CV) {
+ for (unsigned i = 0; i < elemNum; ++i)
+ if (!isa<UndefValue>(CV->getOperand(i)))
+ Result.AggregateVal[i].DoubleVal = cast<ConstantFP>(
+ CV->getOperand(i))->getValueAPF().convertToDouble();
+ break;
+ }
+ if(CDV)
+ for (unsigned i = 0; i < elemNum; ++i)
+ Result.AggregateVal[i].DoubleVal = CDV->getElementAsDouble(i);
+
+ break;
+ }
+ // Check if vector holds integers.
+ if (ElemTy->isIntegerTy()) {
+ if (CAZ) {
+ GenericValue intZero;
+ intZero.IntVal = APInt(ElemTy->getScalarSizeInBits(), 0ull);
+ std::fill(Result.AggregateVal.begin(), Result.AggregateVal.end(),
+ intZero);
+ break;
+ }
+ if(CV) {
+ for (unsigned i = 0; i < elemNum; ++i)
+ if (!isa<UndefValue>(CV->getOperand(i)))
+ Result.AggregateVal[i].IntVal = cast<ConstantInt>(
+ CV->getOperand(i))->getValue();
+ else {
+ Result.AggregateVal[i].IntVal =
+ APInt(CV->getOperand(i)->getType()->getPrimitiveSizeInBits(), 0);
+ }
+ break;
+ }
+ if(CDV)
+ for (unsigned i = 0; i < elemNum; ++i)
+ Result.AggregateVal[i].IntVal = APInt(
+ CDV->getElementType()->getPrimitiveSizeInBits(),
+ CDV->getElementAsInteger(i));
+
+ break;
+ }
+ llvm_unreachable("Unknown constant pointer type!");
+ }
+ break;
+
+ default:
+ SmallString<256> Msg;
+ raw_svector_ostream OS(Msg);
+ OS << "ERROR: Constant unimplemented for type: " << *C->getType();
+ report_fatal_error(OS.str());
+ }
+
+ 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!");
+ const uint8_t *Src = (const 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);
+ }
+}
+
+void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
+ GenericValue *Ptr, Type *Ty) {
+ const unsigned StoreBytes = getDataLayout()->getTypeStoreSize(Ty);
+
+ switch (Ty->getTypeID()) {
+ default:
+ dbgs() << "Cannot store value of type " << *Ty << "!\n";
+ break;
+ 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::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->PointerVal), 0, StoreBytes);
+
+ *((PointerTy*)Ptr) = Val.PointerVal;
+ break;
+ case Type::VectorTyID:
+ for (unsigned i = 0; i < Val.AggregateVal.size(); ++i) {
+ if (cast<VectorType>(Ty)->getElementType()->isDoubleTy())
+ *(((double*)Ptr)+i) = Val.AggregateVal[i].DoubleVal;
+ if (cast<VectorType>(Ty)->getElementType()->isFloatTy())
+ *(((float*)Ptr)+i) = Val.AggregateVal[i].FloatVal;
+ if (cast<VectorType>(Ty)->getElementType()->isIntegerTy()) {
+ unsigned numOfBytes =(Val.AggregateVal[i].IntVal.getBitWidth()+7)/8;
+ StoreIntToMemory(Val.AggregateVal[i].IntVal,
+ (uint8_t*)Ptr + numOfBytes*i, numOfBytes);
+ }
+ }
+ break;
+ }
+
+ if (sys::IsLittleEndianHost != getDataLayout()->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 = reinterpret_cast<uint8_t *>(
+ const_cast<uint64_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,
+ Type *Ty) {
+ const unsigned LoadBytes = getDataLayout()->getTypeStoreSize(Ty);
+
+ switch (Ty->getTypeID()) {
+ 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);
+ break;
+ 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, y);
+ break;
+ }
+ case Type::VectorTyID: {
+ const VectorType *VT = cast<VectorType>(Ty);
+ const Type *ElemT = VT->getElementType();
+ const unsigned numElems = VT->getNumElements();
+ if (ElemT->isFloatTy()) {
+ Result.AggregateVal.resize(numElems);
+ for (unsigned i = 0; i < numElems; ++i)
+ Result.AggregateVal[i].FloatVal = *((float*)Ptr+i);
+ }
+ if (ElemT->isDoubleTy()) {
+ Result.AggregateVal.resize(numElems);
+ for (unsigned i = 0; i < numElems; ++i)
+ Result.AggregateVal[i].DoubleVal = *((double*)Ptr+i);
+ }
+ if (ElemT->isIntegerTy()) {
+ GenericValue intZero;
+ const unsigned elemBitWidth = cast<IntegerType>(ElemT)->getBitWidth();
+ intZero.IntVal = APInt(elemBitWidth, 0);
+ Result.AggregateVal.resize(numElems, intZero);
+ for (unsigned i = 0; i < numElems; ++i)
+ LoadIntFromMemory(Result.AggregateVal[i].IntVal,
+ (uint8_t*)Ptr+((elemBitWidth+7)/8)*i, (elemBitWidth+7)/8);
+ }
+ break;
+ }
+ default:
+ SmallString<256> Msg;
+ raw_svector_ostream OS(Msg);
+ OS << "Cannot load value of type " << *Ty << "!";
+ report_fatal_error(OS.str());
+ }
+}
+
+void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
+ DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
+ DEBUG(Init->dump());
+ if (isa<UndefValue>(Init))
+ return;
+
+ if (const ConstantVector *CP = dyn_cast<ConstantVector>(Init)) {
+ unsigned ElementSize =
+ getDataLayout()->getTypeAllocSize(CP->getType()->getElementType());
+ for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
+ InitializeMemory(CP->getOperand(i), (char*)Addr+i*ElementSize);
+ return;
+ }
+
+ if (isa<ConstantAggregateZero>(Init)) {
+ memset(Addr, 0, (size_t)getDataLayout()->getTypeAllocSize(Init->getType()));
+ return;
+ }
+
+ if (const ConstantArray *CPA = dyn_cast<ConstantArray>(Init)) {
+ unsigned ElementSize =
+ getDataLayout()->getTypeAllocSize(CPA->getType()->getElementType());
+ for (unsigned i = 0, e = CPA->getNumOperands(); i != e; ++i)
+ InitializeMemory(CPA->getOperand(i), (char*)Addr+i*ElementSize);
+ return;
+ }
+
+ if (const ConstantStruct *CPS = dyn_cast<ConstantStruct>(Init)) {
+ const StructLayout *SL =
+ getDataLayout()->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;
+ }
+
+ if (const ConstantDataSequential *CDS =
+ dyn_cast<ConstantDataSequential>(Init)) {
+ // CDS is already laid out in host memory order.
+ StringRef Data = CDS->getRawDataValues();
+ memcpy(Addr, Data.data(), Data.size());
+ return;
+ }
+
+ if (Init->getType()->isFirstClassType()) {
+ GenericValue Val = getConstantValue(Init);
+ StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
+ return;
+ }
+
+ DEBUG(dbgs() << "Bad Type: " << *Init->getType() << "\n");
+ llvm_unreachable("Unknown constant type to initialize memory with!");
+}
+
+/// EmitGlobals - Emit all of the global variables to memory, storing their
+/// addresses into GlobalAddress. This must make sure to copy the contents of
+/// their initializers into the memory.
+void ExecutionEngine::emitGlobals() {
+ // 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
+ // to figure out how the different modules should link together.
+ std::map<std::pair<std::string, Type*>,
+ const GlobalValue*> LinkedGlobalsMap;
+
+ if (Modules.size() != 1) {
+ for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
+ Module &M = *Modules[m];
+ for (const auto &GV : M.globals()) {
+ if (GV.hasLocalLinkage() || GV.isDeclaration() ||
+ GV.hasAppendingLinkage() || !GV.hasName())
+ continue;// Ignore external globals and globals with internal linkage.
+
+ const GlobalValue *&GVEntry =
+ LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())];
+
+ // If this is the first time we've seen this global, it is the canonical
+ // version.
+ if (!GVEntry) {
+ GVEntry = &GV;
+ continue;
+ }
+
+ // If the existing global is strong, never replace it.
+ if (GVEntry->hasExternalLinkage())
+ continue;
+
+ // Otherwise, we know it's linkonce/weak, replace it if this is a strong
+ // symbol. FIXME is this right for common?
+ if (GV.hasExternalLinkage() || GVEntry->hasExternalWeakLinkage())
+ GVEntry = &GV;
+ }
+ }
+ }
+
+ std::vector<const GlobalValue*> NonCanonicalGlobals;
+ for (unsigned m = 0, e = Modules.size(); m != e; ++m) {
+ Module &M = *Modules[m];
+ for (const auto &GV : M.globals()) {
+ // In the multi-module case, see what this global maps to.
+ if (!LinkedGlobalsMap.empty()) {
+ if (const GlobalValue *GVEntry =
+ LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())]) {
+ // If something else is the canonical global, ignore this one.
+ if (GVEntry != &GV) {
+ NonCanonicalGlobals.push_back(&GV);
+ continue;
+ }
+ }
+ }
+
+ if (!GV.isDeclaration()) {
+ addGlobalMapping(&GV, getMemoryForGV(&GV));
+ } else {
+ // External variable reference. Try to use the dynamic loader to
+ // get a pointer to it.
+ if (void *SymAddr =
+ sys::DynamicLibrary::SearchForAddressOfSymbol(GV.getName()))
+ addGlobalMapping(&GV, SymAddr);
+ else {
+ report_fatal_error("Could not resolve external global address: "
+ +GV.getName());
+ }
+ }
+ }
+
+ // If there are multiple modules, map the non-canonical globals to their
+ // canonical location.
+ if (!NonCanonicalGlobals.empty()) {
+ for (unsigned i = 0, e = NonCanonicalGlobals.size(); i != e; ++i) {
+ const GlobalValue *GV = NonCanonicalGlobals[i];
+ const GlobalValue *CGV =
+ LinkedGlobalsMap[std::make_pair(GV->getName(), GV->getType())];
+ void *Ptr = getPointerToGlobalIfAvailable(CGV);
+ assert(Ptr && "Canonical global wasn't codegen'd!");
+ addGlobalMapping(GV, Ptr);
+ }
+ }
+
+ // Now that all of the globals are set up in memory, loop through them all
+ // and initialize their contents.
+ for (const auto &GV : M.globals()) {
+ if (!GV.isDeclaration()) {
+ if (!LinkedGlobalsMap.empty()) {
+ if (const GlobalValue *GVEntry =
+ LinkedGlobalsMap[std::make_pair(GV.getName(), GV.getType())])
+ if (GVEntry != &GV) // Not the canonical variable.
+ continue;
+ }
+ EmitGlobalVariable(&GV);
+ }
+ }
+ }
+}
+
+// EmitGlobalVariable - This method emits the specified global variable to the
+// address specified in GlobalAddresses, or allocates new memory if it's not
+// already in the map.
+void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
+ void *GA = getPointerToGlobalIfAvailable(GV);
+
+ if (!GA) {
+ // If it's not already specified, allocate memory for the global.
+ GA = getMemoryForGV(GV);
+
+ // If we failed to allocate memory for this global, return.
+ if (!GA) return;
+
+ addGlobalMapping(GV, GA);
+ }
+
+ // Don't initialize if it's thread local, let the client do it.
+ if (!GV->isThreadLocal())
+ InitializeMemory(GV->getInitializer(), GA);
+
+ Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)getDataLayout()->getTypeAllocSize(ElTy);
+ NumInitBytes += (unsigned)GVSize;
+ ++NumGlobals;
+}
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