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LLVMReactor.cpp
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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "Reactor.hpp"
#include "x86.hpp"
#include "CPUID.hpp"
#include "Thread.hpp"
#include "ExecutableMemory.hpp"
#include "MutexLock.hpp"
#undef min
#undef max
#if REACTOR_LLVM_VERSION < 7
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Intrinsics.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Support/IRBuilder.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/Scalar.h"
#include "../lib/ExecutionEngine/JIT/JIT.h"
#include "LLVMRoutine.hpp"
#include "LLVMRoutineManager.hpp"
#define ARGS(...) __VA_ARGS__
#else
#include "llvm/Analysis/LoopPass.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include "LLVMRoutine.hpp"
#define ARGS(...) {__VA_ARGS__}
#define CreateCall2 CreateCall
#define CreateCall3 CreateCall
#include <unordered_map>
#endif
#include <numeric>
#include <fstream>
#if defined(__i386__) || defined(__x86_64__)
#include <xmmintrin.h>
#endif
#include <math.h>
#if defined(__x86_64__) && defined(_WIN32)
extern "C" void X86CompilationCallback()
{
assert(false); // UNIMPLEMENTED
}
#endif
#if defined(_WIN32)
extern "C"
{
bool (*CodeAnalystInitialize)() = 0;
void (*CodeAnalystCompleteJITLog)() = 0;
bool (*CodeAnalystLogJITCode)(const void *jitCodeStartAddr, unsigned int jitCodeSize, const wchar_t *functionName) = 0;
}
#endif
#if REACTOR_LLVM_VERSION < 7
namespace llvm
{
extern bool JITEmitDebugInfo;
}
#endif
namespace rr
{
class LLVMReactorJIT;
}
namespace
{
rr::LLVMReactorJIT *reactorJIT = nullptr;
llvm::IRBuilder<> *builder = nullptr;
llvm::LLVMContext *context = nullptr;
llvm::Module *module = nullptr;
llvm::Function *function = nullptr;
rr::MutexLock codegenMutex;
#if REACTOR_LLVM_VERSION >= 7
llvm::Value *lowerPAVG(llvm::Value *x, llvm::Value *y)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::VectorType *extTy =
llvm::VectorType::getExtendedElementVectorType(ty);
x = ::builder->CreateZExt(x, extTy);
y = ::builder->CreateZExt(y, extTy);
// (x + y + 1) >> 1
llvm::Constant *one = llvm::ConstantInt::get(extTy, 1);
llvm::Value *res = ::builder->CreateAdd(x, y);
res = ::builder->CreateAdd(res, one);
res = ::builder->CreateLShr(res, one);
return ::builder->CreateTrunc(res, ty);
}
llvm::Value *lowerPMINMAX(llvm::Value *x, llvm::Value *y,
llvm::ICmpInst::Predicate pred)
{
return ::builder->CreateSelect(::builder->CreateICmp(pred, x, y), x, y);
}
llvm::Value *lowerPCMP(llvm::ICmpInst::Predicate pred, llvm::Value *x,
llvm::Value *y, llvm::Type *dstTy)
{
return ::builder->CreateSExt(::builder->CreateICmp(pred, x, y), dstTy, "");
}
#if defined(__i386__) || defined(__x86_64__)
llvm::Value *lowerPMOV(llvm::Value *op, llvm::Type *dstType, bool sext)
{
llvm::VectorType *srcTy = llvm::cast<llvm::VectorType>(op->getType());
llvm::VectorType *dstTy = llvm::cast<llvm::VectorType>(dstType);
llvm::Value *undef = llvm::UndefValue::get(srcTy);
llvm::SmallVector<uint32_t, 16> mask(dstTy->getNumElements());
std::iota(mask.begin(), mask.end(), 0);
llvm::Value *v = ::builder->CreateShuffleVector(op, undef, mask);
return sext ? ::builder->CreateSExt(v, dstTy)
: ::builder->CreateZExt(v, dstTy);
}
llvm::Value *lowerPABS(llvm::Value *v)
{
llvm::Value *zero = llvm::Constant::getNullValue(v->getType());
llvm::Value *cmp = ::builder->CreateICmp(llvm::ICmpInst::ICMP_SGT, v, zero);
llvm::Value *neg = ::builder->CreateNeg(v);
return ::builder->CreateSelect(cmp, v, neg);
}
#endif // defined(__i386__) || defined(__x86_64__)
#if !defined(__i386__) && !defined(__x86_64__)
llvm::Value *lowerPFMINMAX(llvm::Value *x, llvm::Value *y,
llvm::FCmpInst::Predicate pred)
{
return ::builder->CreateSelect(::builder->CreateFCmp(pred, x, y), x, y);
}
llvm::Value *lowerRound(llvm::Value *x)
{
llvm::Function *nearbyint = llvm::Intrinsic::getDeclaration(
::module, llvm::Intrinsic::nearbyint, {x->getType()});
return ::builder->CreateCall(nearbyint, ARGS(x));
}
llvm::Value *lowerRoundInt(llvm::Value *x, llvm::Type *ty)
{
return ::builder->CreateFPToSI(lowerRound(x), ty);
}
llvm::Value *lowerFloor(llvm::Value *x)
{
llvm::Function *floor = llvm::Intrinsic::getDeclaration(
::module, llvm::Intrinsic::floor, {x->getType()});
return ::builder->CreateCall(floor, ARGS(x));
}
llvm::Value *lowerTrunc(llvm::Value *x)
{
llvm::Function *trunc = llvm::Intrinsic::getDeclaration(
::module, llvm::Intrinsic::trunc, {x->getType()});
return ::builder->CreateCall(trunc, ARGS(x));
}
// Packed add/sub saturatation
llvm::Value *lowerPSAT(llvm::Value *x, llvm::Value *y, bool isAdd, bool isSigned)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::VectorType *extTy = llvm::VectorType::getExtendedElementVectorType(ty);
unsigned numBits = ty->getScalarSizeInBits();
llvm::Value *max, *min, *extX, *extY;
if (isSigned)
{
max = llvm::ConstantInt::get(extTy, (1LL << (numBits - 1)) - 1, true);
min = llvm::ConstantInt::get(extTy, (-1LL << (numBits - 1)), true);
extX = ::builder->CreateSExt(x, extTy);
extY = ::builder->CreateSExt(y, extTy);
}
else
{
assert(numBits <= 64);
uint64_t maxVal = (numBits == 64) ? ~0ULL : (1ULL << numBits) - 1;
max = llvm::ConstantInt::get(extTy, maxVal, false);
min = llvm::ConstantInt::get(extTy, 0, false);
extX = ::builder->CreateZExt(x, extTy);
extY = ::builder->CreateZExt(y, extTy);
}
llvm::Value *res = isAdd ? ::builder->CreateAdd(extX, extY)
: ::builder->CreateSub(extX, extY);
res = lowerPMINMAX(res, min, llvm::ICmpInst::ICMP_SGT);
res = lowerPMINMAX(res, max, llvm::ICmpInst::ICMP_SLT);
return ::builder->CreateTrunc(res, ty);
}
llvm::Value *lowerPUADDSAT(llvm::Value *x, llvm::Value *y)
{
return lowerPSAT(x, y, true, false);
}
llvm::Value *lowerPSADDSAT(llvm::Value *x, llvm::Value *y)
{
return lowerPSAT(x, y, true, true);
}
llvm::Value *lowerPUSUBSAT(llvm::Value *x, llvm::Value *y)
{
return lowerPSAT(x, y, false, false);
}
llvm::Value *lowerPSSUBSAT(llvm::Value *x, llvm::Value *y)
{
return lowerPSAT(x, y, false, true);
}
llvm::Value *lowerSQRT(llvm::Value *x)
{
llvm::Function *sqrt = llvm::Intrinsic::getDeclaration(
::module, llvm::Intrinsic::sqrt, {x->getType()});
return ::builder->CreateCall(sqrt, ARGS(x));
}
llvm::Value *lowerRCP(llvm::Value *x)
{
llvm::Type *ty = x->getType();
llvm::Constant *one;
if (llvm::VectorType *vectorTy = llvm::dyn_cast<llvm::VectorType>(ty))
{
one = llvm::ConstantVector::getSplat(
vectorTy->getNumElements(),
llvm::ConstantFP::get(vectorTy->getElementType(), 1));
}
else
{
one = llvm::ConstantFP::get(ty, 1);
}
return ::builder->CreateFDiv(one, x);
}
llvm::Value *lowerRSQRT(llvm::Value *x)
{
return lowerRCP(lowerSQRT(x));
}
llvm::Value *lowerVectorShl(llvm::Value *x, uint64_t scalarY)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::Value *y = llvm::ConstantVector::getSplat(
ty->getNumElements(),
llvm::ConstantInt::get(ty->getElementType(), scalarY));
return ::builder->CreateShl(x, y);
}
llvm::Value *lowerVectorAShr(llvm::Value *x, uint64_t scalarY)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::Value *y = llvm::ConstantVector::getSplat(
ty->getNumElements(),
llvm::ConstantInt::get(ty->getElementType(), scalarY));
return ::builder->CreateAShr(x, y);
}
llvm::Value *lowerVectorLShr(llvm::Value *x, uint64_t scalarY)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::Value *y = llvm::ConstantVector::getSplat(
ty->getNumElements(),
llvm::ConstantInt::get(ty->getElementType(), scalarY));
return ::builder->CreateLShr(x, y);
}
llvm::Value *lowerMulAdd(llvm::Value *x, llvm::Value *y)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::VectorType *extTy = llvm::VectorType::getExtendedElementVectorType(ty);
llvm::Value *extX = ::builder->CreateSExt(x, extTy);
llvm::Value *extY = ::builder->CreateSExt(y, extTy);
llvm::Value *mult = ::builder->CreateMul(extX, extY);
llvm::Value *undef = llvm::UndefValue::get(extTy);
llvm::SmallVector<uint32_t, 16> evenIdx;
llvm::SmallVector<uint32_t, 16> oddIdx;
for (uint64_t i = 0, n = ty->getNumElements(); i < n; i += 2)
{
evenIdx.push_back(i);
oddIdx.push_back(i + 1);
}
llvm::Value *lhs = ::builder->CreateShuffleVector(mult, undef, evenIdx);
llvm::Value *rhs = ::builder->CreateShuffleVector(mult, undef, oddIdx);
return ::builder->CreateAdd(lhs, rhs);
}
llvm::Value *lowerMulHigh(llvm::Value *x, llvm::Value *y, bool sext)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::VectorType *extTy = llvm::VectorType::getExtendedElementVectorType(ty);
llvm::Value *extX, *extY;
if (sext)
{
extX = ::builder->CreateSExt(x, extTy);
extY = ::builder->CreateSExt(y, extTy);
}
else
{
extX = ::builder->CreateZExt(x, extTy);
extY = ::builder->CreateZExt(y, extTy);
}
llvm::Value *mult = ::builder->CreateMul(extX, extY);
llvm::IntegerType *intTy = llvm::cast<llvm::IntegerType>(ty->getElementType());
llvm::Value *mulh = ::builder->CreateAShr(mult, intTy->getIntegerBitWidth());
return ::builder->CreateTrunc(mulh, ty);
}
llvm::Value *lowerPack(llvm::Value *x, llvm::Value *y, bool isSigned)
{
llvm::VectorType *srcTy = llvm::cast<llvm::VectorType>(x->getType());
llvm::VectorType *dstTy = llvm::VectorType::getTruncatedElementVectorType(srcTy);
llvm::IntegerType *dstElemTy =
llvm::cast<llvm::IntegerType>(dstTy->getElementType());
uint64_t truncNumBits = dstElemTy->getIntegerBitWidth();
assert(truncNumBits < 64 && "shift 64 must be handled separately");
llvm::Constant *max, *min;
if (isSigned)
{
max = llvm::ConstantInt::get(srcTy, (1LL << (truncNumBits - 1)) - 1, true);
min = llvm::ConstantInt::get(srcTy, (-1LL << (truncNumBits - 1)), true);
}
else
{
max = llvm::ConstantInt::get(srcTy, (1ULL << truncNumBits) - 1, false);
min = llvm::ConstantInt::get(srcTy, 0, false);
}
x = lowerPMINMAX(x, min, llvm::ICmpInst::ICMP_SGT);
x = lowerPMINMAX(x, max, llvm::ICmpInst::ICMP_SLT);
y = lowerPMINMAX(y, min, llvm::ICmpInst::ICMP_SGT);
y = lowerPMINMAX(y, max, llvm::ICmpInst::ICMP_SLT);
x = ::builder->CreateTrunc(x, dstTy);
y = ::builder->CreateTrunc(y, dstTy);
llvm::SmallVector<uint32_t, 16> index(srcTy->getNumElements() * 2);
std::iota(index.begin(), index.end(), 0);
return ::builder->CreateShuffleVector(x, y, index);
}
llvm::Value *lowerSignMask(llvm::Value *x, llvm::Type *retTy)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::Constant *zero = llvm::ConstantInt::get(ty, 0);
llvm::Value *cmp = ::builder->CreateICmpSLT(x, zero);
llvm::Value *ret = ::builder->CreateZExt(
::builder->CreateExtractElement(cmp, static_cast<uint64_t>(0)), retTy);
for (uint64_t i = 1, n = ty->getNumElements(); i < n; ++i)
{
llvm::Value *elem = ::builder->CreateZExt(
::builder->CreateExtractElement(cmp, i), retTy);
ret = ::builder->CreateOr(ret, ::builder->CreateShl(elem, i));
}
return ret;
}
llvm::Value *lowerFPSignMask(llvm::Value *x, llvm::Type *retTy)
{
llvm::VectorType *ty = llvm::cast<llvm::VectorType>(x->getType());
llvm::Constant *zero = llvm::ConstantFP::get(ty, 0);
llvm::Value *cmp = ::builder->CreateFCmpULT(x, zero);
llvm::Value *ret = ::builder->CreateZExt(
::builder->CreateExtractElement(cmp, static_cast<uint64_t>(0)), retTy);
for (uint64_t i = 1, n = ty->getNumElements(); i < n; ++i)
{
llvm::Value *elem = ::builder->CreateZExt(
::builder->CreateExtractElement(cmp, i), retTy);
ret = ::builder->CreateOr(ret, ::builder->CreateShl(elem, i));
}
return ret;
}
#endif // !defined(__i386__) && !defined(__x86_64__)
#endif // REACTOR_LLVM_VERSION >= 7
}
namespace rr
{
#if REACTOR_LLVM_VERSION < 7
class LLVMReactorJIT
{
private:
std::string arch;
llvm::SmallVector<std::string, 16> mattrs;
llvm::ExecutionEngine *executionEngine;
LLVMRoutineManager *routineManager;
public:
LLVMReactorJIT(const std::string &arch_,
const llvm::SmallVectorImpl<std::string> &mattrs_) :
arch(arch_),
mattrs(mattrs_.begin(), mattrs_.end()),
executionEngine(nullptr),
routineManager(nullptr)
{
}
void startSession()
{
std::string error;
::module = new llvm::Module("", *::context);
routineManager = new LLVMRoutineManager();
llvm::TargetMachine *targetMachine =
llvm::EngineBuilder::selectTarget(
::module, arch, "", mattrs, llvm::Reloc::Default,
llvm::CodeModel::JITDefault, &error);
executionEngine = llvm::JIT::createJIT(
::module, &error, routineManager, llvm::CodeGenOpt::Aggressive,
true, targetMachine);
}
void endSession()
{
delete executionEngine;
executionEngine = nullptr;
routineManager = nullptr;
::function = nullptr;
::module = nullptr;
}
LLVMRoutine *acquireRoutine(llvm::Function *func)
{
void *entry = executionEngine->getPointerToFunction(::function);
return routineManager->acquireRoutine(entry);
}
void optimize(llvm::Module *module)
{
static llvm::PassManager *passManager = nullptr;
if(!passManager)
{
passManager = new llvm::PassManager();
passManager->add(new llvm::TargetData(*executionEngine->getTargetData()));
passManager->add(llvm::createScalarReplAggregatesPass());
for(int pass = 0; pass < 10 && optimization[pass] != Disabled; pass++)
{
switch(optimization[pass])
{
case Disabled: break;
case CFGSimplification: passManager->add(llvm::createCFGSimplificationPass()); break;
case LICM: passManager->add(llvm::createLICMPass()); break;
case AggressiveDCE: passManager->add(llvm::createAggressiveDCEPass()); break;
case GVN: passManager->add(llvm::createGVNPass()); break;
case InstructionCombining: passManager->add(llvm::createInstructionCombiningPass()); break;
case Reassociate: passManager->add(llvm::createReassociatePass()); break;
case DeadStoreElimination: passManager->add(llvm::createDeadStoreEliminationPass()); break;
case SCCP: passManager->add(llvm::createSCCPPass()); break;
case ScalarReplAggregates: passManager->add(llvm::createScalarReplAggregatesPass()); break;
default:
assert(false);
}
}
}
passManager->run(*::module);
}
};
#else
class ExternalFunctionSymbolResolver
{
private:
using FunctionMap = std::unordered_map<std::string, void *>;
FunctionMap func_;
public:
ExternalFunctionSymbolResolver()
{
func_.emplace("floorf", reinterpret_cast<void*>(floorf));
func_.emplace("nearbyintf", reinterpret_cast<void*>(nearbyintf));
func_.emplace("truncf", reinterpret_cast<void*>(truncf));
}
void *findSymbol(const std::string &name) const
{
FunctionMap::const_iterator it = func_.find(name);
return (it != func_.end()) ? it->second : nullptr;
}
};
class LLVMReactorJIT
{
private:
using ObjLayer = llvm::orc::RTDyldObjectLinkingLayer;
using CompileLayer = llvm::orc::IRCompileLayer<ObjLayer, llvm::orc::SimpleCompiler>;
llvm::orc::ExecutionSession session;
ExternalFunctionSymbolResolver externalSymbolResolver;
std::shared_ptr<llvm::orc::SymbolResolver> resolver;
std::unique_ptr<llvm::TargetMachine> targetMachine;
const llvm::DataLayout dataLayout;
ObjLayer objLayer;
CompileLayer compileLayer;
size_t emittedFunctionsNum;
public:
LLVMReactorJIT(const char *arch, const llvm::SmallVectorImpl<std::string>& mattrs,
const llvm::TargetOptions &targetOpts):
resolver(createLegacyLookupResolver(
session,
[this](const std::string &name) {
void *func = externalSymbolResolver.findSymbol(name);
if (func != nullptr)
{
return llvm::JITSymbol(
reinterpret_cast<uintptr_t>(func), llvm::JITSymbolFlags::Absolute);
}
return objLayer.findSymbol(name, true);
},
[](llvm::Error err) {
if (err)
{
// TODO: Log the symbol resolution errors.
return;
}
})),
targetMachine(llvm::EngineBuilder()
.setMArch(arch)
.setMAttrs(mattrs)
.setTargetOptions(targetOpts)
.selectTarget()),
dataLayout(targetMachine->createDataLayout()),
objLayer(
session,
[this](llvm::orc::VModuleKey) {
return ObjLayer::Resources{
std::make_shared<llvm::SectionMemoryManager>(),
resolver};
}),
compileLayer(objLayer, llvm::orc::SimpleCompiler(*targetMachine)),
emittedFunctionsNum(0)
{
}
void startSession()
{
::module = new llvm::Module("", *::context);
}
void endSession()
{
::function = nullptr;
::module = nullptr;
}
LLVMRoutine *acquireRoutine(llvm::Function *func)
{
std::string name = "f" + llvm::Twine(emittedFunctionsNum++).str();
func->setName(name);
func->setLinkage(llvm::GlobalValue::ExternalLinkage);
func->setDoesNotThrow();
std::unique_ptr<llvm::Module> mod(::module);
::module = nullptr;
mod->setDataLayout(dataLayout);
auto moduleKey = session.allocateVModule();
llvm::cantFail(compileLayer.addModule(moduleKey, std::move(mod)));
std::string mangledName;
{
llvm::raw_string_ostream mangledNameStream(mangledName);
llvm::Mangler::getNameWithPrefix(mangledNameStream, name, dataLayout);
}
llvm::JITSymbol symbol = compileLayer.findSymbolIn(moduleKey, mangledName, false);
llvm::Expected<llvm::JITTargetAddress> expectAddr = symbol.getAddress();
if(!expectAddr)
{
return nullptr;
}
void *addr = reinterpret_cast<void *>(static_cast<intptr_t>(expectAddr.get()));
return new LLVMRoutine(addr, releaseRoutineCallback, this, moduleKey);
}
void optimize(llvm::Module *module)
{
std::unique_ptr<llvm::legacy::PassManager> passManager(
new llvm::legacy::PassManager());
passManager->add(llvm::createSROAPass());
for(int pass = 0; pass < 10 && optimization[pass] != Disabled; pass++)
{
switch(optimization[pass])
{
case Disabled: break;
case CFGSimplification: passManager->add(llvm::createCFGSimplificationPass()); break;
case LICM: passManager->add(llvm::createLICMPass()); break;
case AggressiveDCE: passManager->add(llvm::createAggressiveDCEPass()); break;
case GVN: passManager->add(llvm::createGVNPass()); break;
case InstructionCombining: passManager->add(llvm::createInstructionCombiningPass()); break;
case Reassociate: passManager->add(llvm::createReassociatePass()); break;
case DeadStoreElimination: passManager->add(llvm::createDeadStoreEliminationPass()); break;
case SCCP: passManager->add(llvm::createSCCPPass()); break;
case ScalarReplAggregates: passManager->add(llvm::createSROAPass()); break;
default:
assert(false);
}
}
passManager->run(*::module);
}
private:
void releaseRoutineModule(llvm::orc::VModuleKey moduleKey)
{
llvm::cantFail(compileLayer.removeModule(moduleKey));
}
static void releaseRoutineCallback(LLVMReactorJIT *jit, uint64_t moduleKey)
{
jit->releaseRoutineModule(moduleKey);
}
};
#endif
Optimization optimization[10] = {InstructionCombining, Disabled};
enum EmulatedType
{
Type_v2i32,
Type_v4i16,
Type_v2i16,
Type_v8i8,
Type_v4i8,
Type_v2f32,
EmulatedTypeCount
};
llvm::Type *T(Type *t)
{
uintptr_t type = reinterpret_cast<uintptr_t>(t);
if(type < EmulatedTypeCount)
{
// Use 128-bit vectors to implement logically shorter ones.
switch(type)
{
case Type_v2i32: return T(Int4::getType());
case Type_v4i16: return T(Short8::getType());
case Type_v2i16: return T(Short8::getType());
case Type_v8i8: return T(Byte16::getType());
case Type_v4i8: return T(Byte16::getType());
case Type_v2f32: return T(Float4::getType());
default: assert(false);
}
}
return reinterpret_cast<llvm::Type*>(t);
}
inline Type *T(llvm::Type *t)
{
return reinterpret_cast<Type*>(t);
}
Type *T(EmulatedType t)
{
return reinterpret_cast<Type*>(t);
}
inline llvm::Value *V(Value *t)
{
return reinterpret_cast<llvm::Value*>(t);
}
inline Value *V(llvm::Value *t)
{
return reinterpret_cast<Value*>(t);
}
inline std::vector<llvm::Type*> &T(std::vector<Type*> &t)
{
return reinterpret_cast<std::vector<llvm::Type*>&>(t);
}
inline llvm::BasicBlock *B(BasicBlock *t)
{
return reinterpret_cast<llvm::BasicBlock*>(t);
}
inline BasicBlock *B(llvm::BasicBlock *t)
{
return reinterpret_cast<BasicBlock*>(t);
}
static size_t typeSize(Type *type)
{
uintptr_t t = reinterpret_cast<uintptr_t>(type);
if(t < EmulatedTypeCount)
{
switch(t)
{
case Type_v2i32: return 8;
case Type_v4i16: return 8;
case Type_v2i16: return 4;
case Type_v8i8: return 8;
case Type_v4i8: return 4;
case Type_v2f32: return 8;
default: assert(false);
}
}
return T(type)->getPrimitiveSizeInBits() / 8;
}
static unsigned int elementCount(Type *type)
{
uintptr_t t = reinterpret_cast<uintptr_t>(type);
if(t < EmulatedTypeCount)
{
switch(t)
{
case Type_v2i32: return 2;
case Type_v4i16: return 4;
case Type_v2i16: return 2;
case Type_v8i8: return 8;
case Type_v4i8: return 4;
case Type_v2f32: return 2;
default: assert(false);
}
}
return llvm::cast<llvm::VectorType>(T(type))->getNumElements();
}
Nucleus::Nucleus()
{
::codegenMutex.lock(); // Reactor and LLVM are currently not thread safe
llvm::InitializeNativeTarget();
#if REACTOR_LLVM_VERSION >= 7
llvm::InitializeNativeTargetAsmPrinter();
llvm::InitializeNativeTargetAsmParser();
#endif
if(!::context)
{
::context = new llvm::LLVMContext();
}
#if defined(__x86_64__)
static const char arch[] = "x86-64";
#elif defined(__i386__)
static const char arch[] = "x86";
#elif defined(__aarch64__)
static const char arch[] = "arm64";
#elif defined(__arm__)
static const char arch[] = "arm";
#elif defined(__mips__)
#if defined(__mips64)
static const char arch[] = "mips64el";
#else
static const char arch[] = "mipsel";
#endif
#else
#error "unknown architecture"
#endif
llvm::SmallVector<std::string, 1> mattrs;
#if defined(__i386__) || defined(__x86_64__)
mattrs.push_back(CPUID::supportsMMX() ? "+mmx" : "-mmx");
mattrs.push_back(CPUID::supportsCMOV() ? "+cmov" : "-cmov");
mattrs.push_back(CPUID::supportsSSE() ? "+sse" : "-sse");
mattrs.push_back(CPUID::supportsSSE2() ? "+sse2" : "-sse2");
mattrs.push_back(CPUID::supportsSSE3() ? "+sse3" : "-sse3");
mattrs.push_back(CPUID::supportsSSSE3() ? "+ssse3" : "-ssse3");
#if REACTOR_LLVM_VERSION < 7
mattrs.push_back(CPUID::supportsSSE4_1() ? "+sse41" : "-sse41");
#else
mattrs.push_back(CPUID::supportsSSE4_1() ? "+sse4.1" : "-sse4.1");
#endif
#elif defined(__arm__)
#if __ARM_ARCH >= 8
mattrs.push_back("+armv8-a");
#else
// armv7-a requires compiler-rt routines; otherwise, compiled kernel
// might fail to link.
#endif
#endif
#if REACTOR_LLVM_VERSION < 7
llvm::JITEmitDebugInfo = false;
llvm::UnsafeFPMath = true;
// llvm::NoInfsFPMath = true;
// llvm::NoNaNsFPMath = true;
#else
llvm::TargetOptions targetOpts;
targetOpts.UnsafeFPMath = false;
// targetOpts.NoInfsFPMath = true;
// targetOpts.NoNaNsFPMath = true;
#endif
if(!::reactorJIT)
{
#if REACTOR_LLVM_VERSION < 7
::reactorJIT = new LLVMReactorJIT(arch, mattrs);
#else
::reactorJIT = new LLVMReactorJIT(arch, mattrs, targetOpts);
#endif
}
::reactorJIT->startSession();
if(!::builder)
{
::builder = new llvm::IRBuilder<>(*::context);
#if defined(_WIN32) && REACTOR_LLVM_VERSION < 7
HMODULE CodeAnalyst = LoadLibrary("CAJitNtfyLib.dll");
if(CodeAnalyst)
{
CodeAnalystInitialize = (bool(*)())GetProcAddress(CodeAnalyst, "CAJIT_Initialize");
CodeAnalystCompleteJITLog = (void(*)())GetProcAddress(CodeAnalyst, "CAJIT_CompleteJITLog");
CodeAnalystLogJITCode = (bool(*)(const void*, unsigned int, const wchar_t*))GetProcAddress(CodeAnalyst, "CAJIT_LogJITCode");
CodeAnalystInitialize();
}
#endif
}
}
Nucleus::~Nucleus()
{
::reactorJIT->endSession();
::codegenMutex.unlock();
}
Routine *Nucleus::acquireRoutine(const wchar_t *name, bool runOptimizations)
{
if(::builder->GetInsertBlock()->empty() || !::builder->GetInsertBlock()->back().isTerminator())
{
llvm::Type *type = ::function->getReturnType();
if(type->isVoidTy())
{
createRetVoid();
}
else
{
createRet(V(llvm::UndefValue::get(type)));
}
}
if(false)
{
#if REACTOR_LLVM_VERSION < 7
std::string error;
#else
std::error_code error;
#endif
llvm::raw_fd_ostream file("llvm-dump-unopt.txt", error);
::module->print(file, 0);
}
if(runOptimizations)
{
optimize();
}
if(false)
{
#if REACTOR_LLVM_VERSION < 7
std::string error;
#else
std::error_code error;
#endif
llvm::raw_fd_ostream file("llvm-dump-opt.txt", error);
::module->print(file, 0);
}
LLVMRoutine *routine = ::reactorJIT->acquireRoutine(::function);
#if defined(_WIN32) && REACTOR_LLVM_VERSION < 7
if(CodeAnalystLogJITCode)
{
CodeAnalystLogJITCode(routine->getEntry(), routine->getCodeSize(), name);
}
#endif
return routine;
}
void Nucleus::optimize()
{
::reactorJIT->optimize(::module);
}
Value *Nucleus::allocateStackVariable(Type *type, int arraySize)
{
// Need to allocate it in the entry block for mem2reg to work
llvm::BasicBlock &entryBlock = ::function->getEntryBlock();
llvm::Instruction *declaration;
if(arraySize)
{
#if REACTOR_LLVM_VERSION < 7
declaration = new llvm::AllocaInst(T(type), V(Nucleus::createConstantInt(arraySize)));
#else
declaration = new llvm::AllocaInst(T(type), 0, V(Nucleus::createConstantInt(arraySize)));
#endif
}
else
{
#if REACTOR_LLVM_VERSION < 7
declaration = new llvm::AllocaInst(T(type), (llvm::Value*)nullptr);
#else
declaration = new llvm::AllocaInst(T(type), 0, (llvm::Value*)nullptr);
#endif
}
entryBlock.getInstList().push_front(declaration);
return V(declaration);
}