1310 lines
46 KiB
C++
1310 lines
46 KiB
C++
//===-- ExecutionEngine.cpp - Common Implementation shared by EEs ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the common interface used by the various execution engine
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// subclasses.
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//
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// FIXME: This file needs to be updated to support scalable vectors
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ExecutionEngine/GenericValue.h"
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#include "llvm/ExecutionEngine/JITEventListener.h"
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#include "llvm/ExecutionEngine/ObjectCache.h"
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#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Mangler.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Operator.h"
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#include "llvm/IR/ValueHandle.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetMachine.h"
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#include <cmath>
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#include <cstring>
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#include <mutex>
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using namespace llvm;
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#define DEBUG_TYPE "jit"
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STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");
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STATISTIC(NumGlobals , "Number of global vars initialized");
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ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
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std::unique_ptr<Module> M, std::string *ErrorStr,
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std::shared_ptr<MCJITMemoryManager> MemMgr,
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std::shared_ptr<LegacyJITSymbolResolver> Resolver,
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std::unique_ptr<TargetMachine> TM) = nullptr;
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ExecutionEngine *(*ExecutionEngine::InterpCtor)(std::unique_ptr<Module> M,
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std::string *ErrorStr) =nullptr;
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void JITEventListener::anchor() {}
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void ObjectCache::anchor() {}
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void ExecutionEngine::Init(std::unique_ptr<Module> M) {
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CompilingLazily = false;
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GVCompilationDisabled = false;
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SymbolSearchingDisabled = false;
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// IR module verification is enabled by default in debug builds, and disabled
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// by default in release builds.
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#ifndef NDEBUG
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VerifyModules = true;
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#else
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VerifyModules = false;
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#endif
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assert(M && "Module is null?");
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Modules.push_back(std::move(M));
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}
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ExecutionEngine::ExecutionEngine(std::unique_ptr<Module> M)
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: DL(M->getDataLayout()), LazyFunctionCreator(nullptr) {
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Init(std::move(M));
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}
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ExecutionEngine::ExecutionEngine(DataLayout DL, std::unique_ptr<Module> M)
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: DL(std::move(DL)), LazyFunctionCreator(nullptr) {
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Init(std::move(M));
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}
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ExecutionEngine::~ExecutionEngine() {
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clearAllGlobalMappings();
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}
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namespace {
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/// Helper class which uses a value handler to automatically deletes the
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/// memory block when the GlobalVariable is destroyed.
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class GVMemoryBlock final : public CallbackVH {
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GVMemoryBlock(const GlobalVariable *GV)
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: CallbackVH(const_cast<GlobalVariable*>(GV)) {}
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public:
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/// Returns the address the GlobalVariable should be written into. The
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/// GVMemoryBlock object prefixes that.
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static char *Create(const GlobalVariable *GV, const DataLayout& TD) {
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Type *ElTy = GV->getValueType();
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size_t GVSize = (size_t)TD.getTypeAllocSize(ElTy);
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void *RawMemory = ::operator new(
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alignTo(sizeof(GVMemoryBlock), TD.getPreferredAlign(GV)) + GVSize);
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new(RawMemory) GVMemoryBlock(GV);
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return static_cast<char*>(RawMemory) + sizeof(GVMemoryBlock);
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}
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void deleted() override {
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// We allocated with operator new and with some extra memory hanging off the
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// end, so don't just delete this. I'm not sure if this is actually
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// required.
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this->~GVMemoryBlock();
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::operator delete(this);
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}
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};
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} // anonymous namespace
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char *ExecutionEngine::getMemoryForGV(const GlobalVariable *GV) {
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return GVMemoryBlock::Create(GV, getDataLayout());
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}
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void ExecutionEngine::addObjectFile(std::unique_ptr<object::ObjectFile> O) {
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llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
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}
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void
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ExecutionEngine::addObjectFile(object::OwningBinary<object::ObjectFile> O) {
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llvm_unreachable("ExecutionEngine subclass doesn't implement addObjectFile.");
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}
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void ExecutionEngine::addArchive(object::OwningBinary<object::Archive> A) {
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llvm_unreachable("ExecutionEngine subclass doesn't implement addArchive.");
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}
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bool ExecutionEngine::removeModule(Module *M) {
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for (auto I = Modules.begin(), E = Modules.end(); I != E; ++I) {
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Module *Found = I->get();
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if (Found == M) {
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I->release();
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Modules.erase(I);
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clearGlobalMappingsFromModule(M);
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return true;
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}
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}
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return false;
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}
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Function *ExecutionEngine::FindFunctionNamed(StringRef FnName) {
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for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
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Function *F = Modules[i]->getFunction(FnName);
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if (F && !F->isDeclaration())
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return F;
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}
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return nullptr;
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}
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GlobalVariable *ExecutionEngine::FindGlobalVariableNamed(StringRef Name, bool AllowInternal) {
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for (unsigned i = 0, e = Modules.size(); i != e; ++i) {
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GlobalVariable *GV = Modules[i]->getGlobalVariable(Name,AllowInternal);
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if (GV && !GV->isDeclaration())
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return GV;
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}
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return nullptr;
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}
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uint64_t ExecutionEngineState::RemoveMapping(StringRef Name) {
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GlobalAddressMapTy::iterator I = GlobalAddressMap.find(Name);
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uint64_t OldVal;
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// FIXME: This is silly, we shouldn't end up with a mapping -> 0 in the
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// GlobalAddressMap.
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if (I == GlobalAddressMap.end())
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OldVal = 0;
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else {
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GlobalAddressReverseMap.erase(I->second);
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OldVal = I->second;
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GlobalAddressMap.erase(I);
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}
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return OldVal;
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}
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std::string ExecutionEngine::getMangledName(const GlobalValue *GV) {
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assert(GV->hasName() && "Global must have name.");
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std::lock_guard<sys::Mutex> locked(lock);
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SmallString<128> FullName;
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const DataLayout &DL =
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GV->getParent()->getDataLayout().isDefault()
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? getDataLayout()
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: GV->getParent()->getDataLayout();
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Mangler::getNameWithPrefix(FullName, GV->getName(), DL);
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return std::string(FullName.str());
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}
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void ExecutionEngine::addGlobalMapping(const GlobalValue *GV, void *Addr) {
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std::lock_guard<sys::Mutex> locked(lock);
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addGlobalMapping(getMangledName(GV), (uint64_t) Addr);
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}
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void ExecutionEngine::addGlobalMapping(StringRef Name, uint64_t Addr) {
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std::lock_guard<sys::Mutex> locked(lock);
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assert(!Name.empty() && "Empty GlobalMapping symbol name!");
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LLVM_DEBUG(dbgs() << "JIT: Map \'" << Name << "\' to [" << Addr << "]\n";);
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uint64_t &CurVal = EEState.getGlobalAddressMap()[Name];
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assert((!CurVal || !Addr) && "GlobalMapping already established!");
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CurVal = Addr;
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// If we are using the reverse mapping, add it too.
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if (!EEState.getGlobalAddressReverseMap().empty()) {
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std::string &V = EEState.getGlobalAddressReverseMap()[CurVal];
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assert((!V.empty() || !Name.empty()) &&
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"GlobalMapping already established!");
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V = std::string(Name);
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}
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}
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void ExecutionEngine::clearAllGlobalMappings() {
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std::lock_guard<sys::Mutex> locked(lock);
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EEState.getGlobalAddressMap().clear();
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EEState.getGlobalAddressReverseMap().clear();
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}
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void ExecutionEngine::clearGlobalMappingsFromModule(Module *M) {
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std::lock_guard<sys::Mutex> locked(lock);
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for (GlobalObject &GO : M->global_objects())
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EEState.RemoveMapping(getMangledName(&GO));
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}
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uint64_t ExecutionEngine::updateGlobalMapping(const GlobalValue *GV,
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void *Addr) {
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std::lock_guard<sys::Mutex> locked(lock);
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return updateGlobalMapping(getMangledName(GV), (uint64_t) Addr);
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}
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uint64_t ExecutionEngine::updateGlobalMapping(StringRef Name, uint64_t Addr) {
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std::lock_guard<sys::Mutex> locked(lock);
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ExecutionEngineState::GlobalAddressMapTy &Map =
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EEState.getGlobalAddressMap();
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// Deleting from the mapping?
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if (!Addr)
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return EEState.RemoveMapping(Name);
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uint64_t &CurVal = Map[Name];
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uint64_t OldVal = CurVal;
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if (CurVal && !EEState.getGlobalAddressReverseMap().empty())
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EEState.getGlobalAddressReverseMap().erase(CurVal);
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CurVal = Addr;
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// If we are using the reverse mapping, add it too.
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if (!EEState.getGlobalAddressReverseMap().empty()) {
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std::string &V = EEState.getGlobalAddressReverseMap()[CurVal];
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assert((!V.empty() || !Name.empty()) &&
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"GlobalMapping already established!");
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V = std::string(Name);
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}
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return OldVal;
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}
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uint64_t ExecutionEngine::getAddressToGlobalIfAvailable(StringRef S) {
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std::lock_guard<sys::Mutex> locked(lock);
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uint64_t Address = 0;
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ExecutionEngineState::GlobalAddressMapTy::iterator I =
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EEState.getGlobalAddressMap().find(S);
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if (I != EEState.getGlobalAddressMap().end())
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Address = I->second;
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return Address;
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}
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void *ExecutionEngine::getPointerToGlobalIfAvailable(StringRef S) {
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std::lock_guard<sys::Mutex> locked(lock);
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if (void* Address = (void *) getAddressToGlobalIfAvailable(S))
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return Address;
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return nullptr;
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}
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void *ExecutionEngine::getPointerToGlobalIfAvailable(const GlobalValue *GV) {
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std::lock_guard<sys::Mutex> locked(lock);
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return getPointerToGlobalIfAvailable(getMangledName(GV));
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}
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const GlobalValue *ExecutionEngine::getGlobalValueAtAddress(void *Addr) {
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std::lock_guard<sys::Mutex> locked(lock);
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// If we haven't computed the reverse mapping yet, do so first.
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if (EEState.getGlobalAddressReverseMap().empty()) {
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for (ExecutionEngineState::GlobalAddressMapTy::iterator
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I = EEState.getGlobalAddressMap().begin(),
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E = EEState.getGlobalAddressMap().end(); I != E; ++I) {
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StringRef Name = I->first();
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uint64_t Addr = I->second;
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EEState.getGlobalAddressReverseMap().insert(
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std::make_pair(Addr, std::string(Name)));
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}
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}
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std::map<uint64_t, std::string>::iterator I =
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EEState.getGlobalAddressReverseMap().find((uint64_t) Addr);
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if (I != EEState.getGlobalAddressReverseMap().end()) {
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StringRef Name = I->second;
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for (unsigned i = 0, e = Modules.size(); i != e; ++i)
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if (GlobalValue *GV = Modules[i]->getNamedValue(Name))
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return GV;
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}
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return nullptr;
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}
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namespace {
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class ArgvArray {
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std::unique_ptr<char[]> Array;
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std::vector<std::unique_ptr<char[]>> Values;
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public:
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/// Turn a vector of strings into a nice argv style array of pointers to null
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/// terminated strings.
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void *reset(LLVMContext &C, ExecutionEngine *EE,
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const std::vector<std::string> &InputArgv);
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};
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} // anonymous namespace
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void *ArgvArray::reset(LLVMContext &C, ExecutionEngine *EE,
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const std::vector<std::string> &InputArgv) {
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Values.clear(); // Free the old contents.
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Values.reserve(InputArgv.size());
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unsigned PtrSize = EE->getDataLayout().getPointerSize();
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Array = std::make_unique<char[]>((InputArgv.size()+1)*PtrSize);
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LLVM_DEBUG(dbgs() << "JIT: ARGV = " << (void *)Array.get() << "\n");
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Type *SBytePtr = Type::getInt8PtrTy(C);
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for (unsigned i = 0; i != InputArgv.size(); ++i) {
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unsigned Size = InputArgv[i].size()+1;
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auto Dest = std::make_unique<char[]>(Size);
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LLVM_DEBUG(dbgs() << "JIT: ARGV[" << i << "] = " << (void *)Dest.get()
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<< "\n");
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std::copy(InputArgv[i].begin(), InputArgv[i].end(), Dest.get());
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Dest[Size-1] = 0;
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// Endian safe: Array[i] = (PointerTy)Dest;
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EE->StoreValueToMemory(PTOGV(Dest.get()),
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(GenericValue*)(&Array[i*PtrSize]), SBytePtr);
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Values.push_back(std::move(Dest));
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}
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// Null terminate it
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EE->StoreValueToMemory(PTOGV(nullptr),
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(GenericValue*)(&Array[InputArgv.size()*PtrSize]),
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SBytePtr);
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return Array.get();
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}
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void ExecutionEngine::runStaticConstructorsDestructors(Module &module,
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bool isDtors) {
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StringRef Name(isDtors ? "llvm.global_dtors" : "llvm.global_ctors");
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GlobalVariable *GV = module.getNamedGlobal(Name);
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// If this global has internal linkage, or if it has a use, then it must be
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// an old-style (llvmgcc3) static ctor with __main linked in and in use. If
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// this is the case, don't execute any of the global ctors, __main will do
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// it.
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if (!GV || GV->isDeclaration() || GV->hasLocalLinkage()) return;
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// Should be an array of '{ i32, void ()* }' structs. The first value is
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// the init priority, which we ignore.
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ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
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if (!InitList)
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return;
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for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
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ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i));
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if (!CS) continue;
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Constant *FP = CS->getOperand(1);
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if (FP->isNullValue())
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continue; // Found a sentinal value, ignore.
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// Strip off constant expression casts.
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
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if (CE->isCast())
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FP = CE->getOperand(0);
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// Execute the ctor/dtor function!
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if (Function *F = dyn_cast<Function>(FP))
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runFunction(F, None);
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// FIXME: It is marginally lame that we just do nothing here if we see an
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// entry we don't recognize. It might not be unreasonable for the verifier
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// to not even allow this and just assert here.
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}
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}
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void ExecutionEngine::runStaticConstructorsDestructors(bool isDtors) {
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// Execute global ctors/dtors for each module in the program.
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for (std::unique_ptr<Module> &M : Modules)
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runStaticConstructorsDestructors(*M, isDtors);
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}
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#ifndef NDEBUG
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/// isTargetNullPtr - Return whether the target pointer stored at Loc is null.
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static bool isTargetNullPtr(ExecutionEngine *EE, void *Loc) {
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unsigned PtrSize = EE->getDataLayout().getPointerSize();
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for (unsigned i = 0; i < PtrSize; ++i)
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if (*(i + (uint8_t*)Loc))
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return false;
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return true;
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}
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#endif
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int ExecutionEngine::runFunctionAsMain(Function *Fn,
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const std::vector<std::string> &argv,
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const char * const * envp) {
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std::vector<GenericValue> GVArgs;
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GenericValue GVArgc;
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GVArgc.IntVal = APInt(32, argv.size());
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// Check main() type
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unsigned NumArgs = Fn->getFunctionType()->getNumParams();
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FunctionType *FTy = Fn->getFunctionType();
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Type* PPInt8Ty = Type::getInt8PtrTy(Fn->getContext())->getPointerTo();
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// Check the argument types.
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if (NumArgs > 3)
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report_fatal_error("Invalid number of arguments of main() supplied");
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if (NumArgs >= 3 && FTy->getParamType(2) != PPInt8Ty)
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report_fatal_error("Invalid type for third argument of main() supplied");
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if (NumArgs >= 2 && FTy->getParamType(1) != PPInt8Ty)
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report_fatal_error("Invalid type for second argument of main() supplied");
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if (NumArgs >= 1 && !FTy->getParamType(0)->isIntegerTy(32))
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report_fatal_error("Invalid type for first argument of main() supplied");
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if (!FTy->getReturnType()->isIntegerTy() &&
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!FTy->getReturnType()->isVoidTy())
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report_fatal_error("Invalid return type of main() supplied");
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ArgvArray CArgv;
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ArgvArray CEnv;
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if (NumArgs) {
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GVArgs.push_back(GVArgc); // Arg #0 = argc.
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if (NumArgs > 1) {
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// Arg #1 = argv.
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GVArgs.push_back(PTOGV(CArgv.reset(Fn->getContext(), this, argv)));
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assert(!isTargetNullPtr(this, GVTOP(GVArgs[1])) &&
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"argv[0] was null after CreateArgv");
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if (NumArgs > 2) {
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std::vector<std::string> EnvVars;
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for (unsigned i = 0; envp[i]; ++i)
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EnvVars.emplace_back(envp[i]);
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// Arg #2 = envp.
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GVArgs.push_back(PTOGV(CEnv.reset(Fn->getContext(), this, EnvVars)));
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}
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}
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}
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return runFunction(Fn, GVArgs).IntVal.getZExtValue();
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}
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EngineBuilder::EngineBuilder() : EngineBuilder(nullptr) {}
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EngineBuilder::EngineBuilder(std::unique_ptr<Module> M)
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: M(std::move(M)), WhichEngine(EngineKind::Either), ErrorStr(nullptr),
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OptLevel(CodeGenOpt::Default), MemMgr(nullptr), Resolver(nullptr) {
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// IR module verification is enabled by default in debug builds, and disabled
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// by default in release builds.
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#ifndef NDEBUG
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VerifyModules = true;
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#else
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VerifyModules = false;
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#endif
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}
|
|
|
|
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<LegacyJITSymbolResolver> SR) {
|
|
Resolver = std::shared_ptr<LegacyJITSymbolResolver>(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) {
|
|
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::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);
|
|
|
|
std::lock_guard<sys::Mutex> 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);
|
|
}
|
|
|
|
/// 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::ScalableVectorTyID:
|
|
report_fatal_error(
|
|
"Scalable vector support not yet implemented in ExecutionEngine");
|
|
case Type::FixedVectorTyID:
|
|
// if the whole vector is 'undef' just reserve memory for the value.
|
|
auto *VTy = cast<FixedVectorType>(C->getType());
|
|
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(makeMutableArrayRef(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));
|
|
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:
|
|
while (auto *A = dyn_cast<GlobalAlias>(C)) {
|
|
C = A->getAliasee();
|
|
}
|
|
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::ScalableVectorTyID:
|
|
report_fatal_error(
|
|
"Scalable vector support not yet implemented in ExecutionEngine");
|
|
case Type::FixedVectorTyID: {
|
|
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) {
|
|
auto *VTy = cast<FixedVectorType>(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;
|
|
}
|
|
|
|
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::FixedVectorTyID:
|
|
case Type::ScalableVectorTyID:
|
|
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);
|
|
}
|
|
|
|
/// 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::ScalableVectorTyID:
|
|
report_fatal_error(
|
|
"Scalable vector support not yet implemented in ExecutionEngine");
|
|
case Type::FixedVectorTyID: {
|
|
auto *VT = cast<FixedVectorType>(Ty);
|
|
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) {
|
|
LLVM_DEBUG(dbgs() << "JIT: Initializing " << Addr << " ");
|
|
LLVM_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;
|
|
}
|
|
|
|
LLVM_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(
|
|
std::string(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(
|
|
std::string(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(
|
|
std::string(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(
|
|
std::string(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(
|
|
std::string(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->getValueType();
|
|
size_t GVSize = (size_t)getDataLayout().getTypeAllocSize(ElTy);
|
|
NumInitBytes += (unsigned)GVSize;
|
|
++NumGlobals;
|
|
}
|