Revision 5b5715a2ff77729570757768063836369cff220e authored by DilumAluthgeBot on 21 April 2022, 22:45:07 UTC, committed by GitHub on 21 April 2022, 22:45:07 UTC
Co-authored-by: Dilum Aluthge <dilum@aluthge.com>
1 parent 4dfef57
jitlayers.h
// This file is a part of Julia. License is MIT: https://julialang.org/license
#include <llvm/IR/LLVMContext.h>
#include <llvm/IR/Constants.h>
#include <llvm/IR/Module.h>
#include <llvm/IR/Value.h>
#include <llvm/IR/PassManager.h>
#include <llvm/IR/LegacyPassManager.h>
#include <llvm/ExecutionEngine/Orc/IRCompileLayer.h>
#include <llvm/ExecutionEngine/Orc/IRTransformLayer.h>
#include <llvm/ExecutionEngine/JITEventListener.h>
#include <llvm/Target/TargetMachine.h>
#include "julia_assert.h"
#include "debug-registry.h"
#include <stack>
#include <queue>
// As of LLVM 13, there are two runtime JIT linker implementations, the older
// RuntimeDyld (used via orc::RTDyldObjectLinkingLayer) and the newer JITLink
// (used via orc::ObjectLinkingLayer).
//
// JITLink is not only more flexible (which isn't of great importance for us, as
// we do only single-threaded in-process codegen), but crucially supports using
// the Small code model, where the linker needs to fix up relocations between
// object files that end up far apart in address space. RuntimeDyld can't do
// that and relies on the Large code model instead, which is broken on
// aarch64-darwin (macOS on ARM64), and not likely to ever be supported there
// (see https://bugs.llvm.org/show_bug.cgi?id=52029).
//
// However, JITLink is a relatively young library and lags behind in platform
// and feature support (e.g. Windows, JITEventListeners for various profilers,
// etc.). Thus, we currently only use JITLink where absolutely required, that is,
// for Mac/aarch64.
#if defined(_OS_DARWIN_) && defined(_CPU_AARCH64_)
# if JL_LLVM_VERSION < 130000
# pragma message("On aarch64-darwin, LLVM version >= 13 is required for JITLink; fallback suffers from occasional segfaults")
# endif
# define JL_USE_JITLINK
#endif
#ifdef JL_USE_JITLINK
# include <llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h>
#else
# include <llvm/ExecutionEngine/RTDyldMemoryManager.h>
# include <llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h>
#endif
using namespace llvm;
extern "C" jl_cgparams_t jl_default_cgparams;
void addTargetPasses(legacy::PassManagerBase *PM, const Triple &triple, TargetIRAnalysis analysis);
void addOptimizationPasses(legacy::PassManagerBase *PM, int opt_level, bool lower_intrinsics=true, bool dump_native=false, bool external_use=false);
void addMachinePasses(legacy::PassManagerBase *PM, int optlevel);
void jl_finalize_module(orc::ThreadSafeModule m);
void jl_merge_module(orc::ThreadSafeModule &dest, orc::ThreadSafeModule src);
GlobalVariable *jl_emit_RTLD_DEFAULT_var(Module *M);
DataLayout jl_create_datalayout(TargetMachine &TM);
static inline bool imaging_default() {
return jl_options.image_codegen || (jl_generating_output() && !jl_options.incremental);
}
struct jl_locked_stream {
JL_STREAM *stream = nullptr;
std::mutex mutex;
struct lock {
std::unique_lock<std::mutex> lck;
JL_STREAM *&stream;
lock(std::mutex &mutex, JL_STREAM *&stream) : lck(mutex), stream(stream) {}
JL_STREAM *&operator*() {
return stream;
}
explicit operator bool() {
return !!stream;
}
operator JL_STREAM *() {
return stream;
}
};
lock operator*() {
return lock(mutex, stream);
}
};
typedef struct _jl_llvm_functions_t {
std::string functionObject; // jlcall llvm Function name
std::string specFunctionObject; // specialized llvm Function name
} jl_llvm_functions_t;
struct jl_returninfo_t {
llvm::Function *decl;
enum CallingConv {
Boxed = 0,
Register,
SRet,
Union,
Ghosts
} cc;
size_t union_bytes;
size_t union_align;
size_t union_minalign;
unsigned return_roots;
};
struct jl_llvmf_dump_t {
orc::ThreadSafeModule TSM;
Function *F;
};
typedef std::vector<std::tuple<jl_code_instance_t*, jl_returninfo_t::CallingConv, unsigned, llvm::Function*, bool>> jl_codegen_call_targets_t;
typedef struct _jl_codegen_params_t {
orc::ThreadSafeContext tsctx;
orc::ThreadSafeContext::Lock tsctx_lock;
typedef StringMap<GlobalVariable*> SymMapGV;
// outputs
jl_codegen_call_targets_t workqueue;
std::map<void*, GlobalVariable*> globals;
std::map<jl_datatype_t*, DIType*> ditypes;
std::map<jl_datatype_t*, Type*> llvmtypes;
DenseMap<Constant*, GlobalVariable*> mergedConstants;
// Map from symbol name (in a certain library) to its GV in sysimg and the
// DL handle address in the current session.
StringMap<std::pair<GlobalVariable*,SymMapGV>> libMapGV;
#ifdef _OS_WINDOWS_
SymMapGV symMapExe;
SymMapGV symMapDll;
SymMapGV symMapDlli;
#endif
SymMapGV symMapDefault;
// Map from distinct callee's to its GOT entry.
// In principle the attribute, function type and calling convention
// don't need to be part of the key but it seems impossible to forward
// all the arguments without writing assembly directly.
// This doesn't matter too much in reality since a single function is usually
// not called with multiple signatures.
DenseMap<AttributeList, std::map<
std::tuple<GlobalVariable*, FunctionType*, CallingConv::ID>,
GlobalVariable*>> allPltMap;
orc::ThreadSafeModule _shared_module;
inline orc::ThreadSafeModule &shared_module(Module &from);
// inputs
size_t world = 0;
const jl_cgparams_t *params = &jl_default_cgparams;
bool cache = false;
bool imaging;
_jl_codegen_params_t(orc::ThreadSafeContext ctx) : tsctx(std::move(ctx)), tsctx_lock(tsctx.getLock()), imaging(imaging_default()) {}
} jl_codegen_params_t;
jl_llvm_functions_t jl_emit_code(
orc::ThreadSafeModule &M,
jl_method_instance_t *mi,
jl_code_info_t *src,
jl_value_t *jlrettype,
jl_codegen_params_t ¶ms);
jl_llvm_functions_t jl_emit_codeinst(
orc::ThreadSafeModule &M,
jl_code_instance_t *codeinst,
jl_code_info_t *src,
jl_codegen_params_t ¶ms);
enum CompilationPolicy {
Default = 0,
Extern = 1,
ImagingMode = 2
};
typedef std::map<jl_code_instance_t*, std::pair<orc::ThreadSafeModule, jl_llvm_functions_t>> jl_workqueue_t;
void jl_compile_workqueue(
jl_workqueue_t &emitted,
Module &original,
jl_codegen_params_t ¶ms,
CompilationPolicy policy);
Function *jl_cfunction_object(jl_function_t *f, jl_value_t *rt, jl_tupletype_t *argt,
jl_codegen_params_t ¶ms);
void add_named_global(StringRef name, void *addr);
static inline Constant *literal_static_pointer_val(const void *p, Type *T)
{
// this function will emit a static pointer into the generated code
// the generated code will only be valid during the current session,
// and thus, this should typically be avoided in new API's
#if defined(_P64)
return ConstantExpr::getIntToPtr(ConstantInt::get(Type::getInt64Ty(T->getContext()), (uint64_t)p), T);
#else
return ConstantExpr::getIntToPtr(ConstantInt::get(Type::getInt32Ty(T->getContext()), (uint32_t)p), T);
#endif
}
static const inline char *name_from_method_instance(jl_method_instance_t *li) JL_NOTSAFEPOINT
{
return jl_is_method(li->def.method) ? jl_symbol_name(li->def.method->name) : "top-level scope";
}
typedef JITSymbol JL_JITSymbol;
// The type that is similar to SymbolInfo on LLVM 4.0 is actually
// `JITEvaluatedSymbol`. However, we only use this type when a JITSymbol
// is expected.
typedef JITSymbol JL_SymbolInfo;
using CompilerResultT = Expected<std::unique_ptr<llvm::MemoryBuffer>>;
using OptimizerResultT = Expected<orc::ThreadSafeModule>;
class JuliaOJIT {
public:
#ifdef JL_USE_JITLINK
typedef orc::ObjectLinkingLayer ObjLayerT;
#else
typedef orc::RTDyldObjectLinkingLayer ObjLayerT;
#endif
typedef orc::IRCompileLayer CompileLayerT;
typedef orc::IRTransformLayer OptimizeLayerT;
typedef object::OwningBinary<object::ObjectFile> OwningObj;
template
<typename ResourceT, size_t max = 0,
typename BackingT = std::stack<ResourceT,
std::conditional_t<max == 0,
SmallVector<ResourceT>,
SmallVector<ResourceT, max>
>
>
>
struct ResourcePool {
public:
ResourcePool(std::function<ResourceT()> creator) : creator(std::move(creator)), mutex(std::make_unique<WNMutex>()) {}
class OwningResource {
public:
OwningResource(ResourcePool &pool, ResourceT resource) : pool(pool), resource(std::move(resource)) {}
OwningResource(const OwningResource &) = delete;
OwningResource &operator=(const OwningResource &) = delete;
OwningResource(OwningResource &&) = default;
OwningResource &operator=(OwningResource &&) = default;
~OwningResource() {
if (resource) pool.release(std::move(*resource));
}
ResourceT release() {
ResourceT res(std::move(*resource));
resource.reset();
return res;
}
void reset(ResourceT res) {
*resource = std::move(res);
}
ResourceT &operator*() {
return *resource;
}
ResourceT *operator->() {
return get();
}
ResourceT *get() {
return resource.getPointer();
}
const ResourceT &operator*() const {
return *resource;
}
const ResourceT *operator->() const {
return get();
}
const ResourceT *get() const {
return resource.getPointer();
}
explicit operator bool() const {
return resource;
}
private:
ResourcePool &pool;
llvm::Optional<ResourceT> resource;
};
OwningResource operator*() {
return OwningResource(*this, acquire());
}
OwningResource get() {
return **this;
}
ResourceT acquire() {
std::unique_lock<std::mutex> lock(mutex->mutex);
if (!pool.empty()) {
return pop(pool);
}
if (!max || created < max) {
created++;
return creator();
}
mutex->empty.wait(lock, [&](){ return !pool.empty(); });
assert(!pool.empty() && "Expected resource pool to have a value!");
return pop(pool);
}
void release(ResourceT &&resource) {
std::lock_guard<std::mutex> lock(mutex->mutex);
pool.push(std::move(resource));
mutex->empty.notify_one();
}
private:
template<typename T, typename Container>
static ResourceT pop(std::queue<T, Container> &pool) {
ResourceT top = std::move(pool.front());
pool.pop();
return top;
}
template<typename PoolT>
static ResourceT pop(PoolT &pool) {
ResourceT top = std::move(pool.top());
pool.pop();
return top;
}
std::function<ResourceT()> creator;
size_t created = 0;
BackingT pool;
struct WNMutex {
std::mutex mutex;
std::condition_variable empty;
};
std::unique_ptr<WNMutex> mutex;
};
struct PipelineT {
PipelineT(orc::ObjectLayer &BaseLayer, TargetMachine &TM, int optlevel);
CompileLayerT CompileLayer;
OptimizeLayerT OptimizeLayer;
};
struct OptSelLayerT : orc::IRLayer {
template<size_t N>
OptSelLayerT(const std::array<std::unique_ptr<PipelineT>, N> &optimizers)
: orc::IRLayer(optimizers[0]->OptimizeLayer.getExecutionSession(),
optimizers[0]->OptimizeLayer.getManglingOptions()),
optimizers(optimizers.data()),
count(N) {
static_assert(N > 0, "Expected array with at least one optimizer!");
}
void emit(std::unique_ptr<orc::MaterializationResponsibility> R, orc::ThreadSafeModule TSM) override;
private:
const std::unique_ptr<PipelineT> * const optimizers;
size_t count;
};
private:
// Custom object emission notification handler for the JuliaOJIT
template <typename ObjT, typename LoadResult>
void registerObject(const ObjT &Obj, const LoadResult &LO);
public:
JuliaOJIT();
void enableJITDebuggingSupport();
#ifndef JL_USE_JITLINK
// JITLink doesn't support old JITEventListeners (yet).
void RegisterJITEventListener(JITEventListener *L);
#endif
void addGlobalMapping(StringRef Name, uint64_t Addr);
void addModule(orc::ThreadSafeModule M);
JL_JITSymbol findSymbol(StringRef Name, bool ExportedSymbolsOnly);
JL_JITSymbol findUnmangledSymbol(StringRef Name);
uint64_t getGlobalValueAddress(StringRef Name);
uint64_t getFunctionAddress(StringRef Name);
StringRef getFunctionAtAddress(uint64_t Addr, jl_code_instance_t *codeinst);
auto getContext() {
return *ContextPool;
}
orc::ThreadSafeContext acquireContext() {
return ContextPool.acquire();
}
void releaseContext(orc::ThreadSafeContext &&ctx) {
ContextPool.release(std::move(ctx));
}
const DataLayout& getDataLayout() const;
// TargetMachine pass-through methods
std::unique_ptr<TargetMachine> cloneTargetMachine() const;
const Triple& getTargetTriple() const;
StringRef getTargetFeatureString() const;
StringRef getTargetCPU() const;
const TargetOptions &getTargetOptions() const;
const Target &getTarget() const;
TargetIRAnalysis getTargetIRAnalysis() const;
size_t getTotalBytes() const;
JITDebugInfoRegistry &getDebugInfoRegistry() JL_NOTSAFEPOINT {
return DebugRegistry;
}
jl_locked_stream &get_dump_emitted_mi_name_stream() JL_NOTSAFEPOINT {
return dump_emitted_mi_name_stream;
}
jl_locked_stream &get_dump_compiles_stream() JL_NOTSAFEPOINT {
return dump_compiles_stream;
}
jl_locked_stream &get_dump_llvm_opt_stream() JL_NOTSAFEPOINT {
return dump_llvm_opt_stream;
}
private:
std::string getMangledName(StringRef Name);
std::string getMangledName(const GlobalValue *GV);
void shareStrings(Module &M);
const std::unique_ptr<TargetMachine> TM;
const DataLayout DL;
orc::ExecutionSession ES;
orc::JITDylib &GlobalJD;
orc::JITDylib &JD;
JITDebugInfoRegistry DebugRegistry;
//Map and inc are guarded by RLST_mutex
std::mutex RLST_mutex{};
int RLST_inc = 0;
DenseMap<void*, std::string> ReverseLocalSymbolTable;
//Compilation streams
jl_locked_stream dump_emitted_mi_name_stream;
jl_locked_stream dump_compiles_stream;
jl_locked_stream dump_llvm_opt_stream;
ResourcePool<orc::ThreadSafeContext, 0, std::queue<orc::ThreadSafeContext>> ContextPool;
#ifndef JL_USE_JITLINK
const std::shared_ptr<RTDyldMemoryManager> MemMgr;
#endif
ObjLayerT ObjectLayer;
const std::array<std::unique_ptr<PipelineT>, 4> Pipelines;
OptSelLayerT OptSelLayer;
};
extern JuliaOJIT *jl_ExecutionEngine;
orc::ThreadSafeModule jl_create_llvm_module(StringRef name, orc::ThreadSafeContext ctx, bool imaging_mode, const DataLayout &DL = jl_ExecutionEngine->getDataLayout(), const Triple &triple = jl_ExecutionEngine->getTargetTriple());
orc::ThreadSafeModule &jl_codegen_params_t::shared_module(Module &from) {
if (!_shared_module) {
_shared_module = jl_create_llvm_module("globals", tsctx, imaging, from.getDataLayout(), Triple(from.getTargetTriple()));
assert(&from.getContext() == tsctx.getContext() && "Module context differs from codegen_params context!");
} else {
assert(&from.getContext() == _shared_module.getContext().getContext() && "Module context differs from shared module context!");
assert(from.getDataLayout() == _shared_module.getModuleUnlocked()->getDataLayout() && "Module data layout differs from shared module data layout!");
assert(from.getTargetTriple() == _shared_module.getModuleUnlocked()->getTargetTriple() && "Module target triple differs from shared module target triple!");
}
return _shared_module;
}
Pass *createLowerPTLSPass(bool imaging_mode);
Pass *createCombineMulAddPass();
Pass *createFinalLowerGCPass();
Pass *createLateLowerGCFramePass();
Pass *createLowerExcHandlersPass();
Pass *createGCInvariantVerifierPass(bool Strong);
Pass *createPropagateJuliaAddrspaces();
Pass *createRemoveJuliaAddrspacesPass();
Pass *createRemoveNIPass();
Pass *createJuliaLICMPass();
Pass *createMultiVersioningPass(bool external_use);
Pass *createAllocOptPass();
Pass *createDemoteFloat16Pass();
Pass *createCPUFeaturesPass();
Pass *createLowerSimdLoopPass();
// NewPM
#include "passes.h"
// Whether the Function is an llvm or julia intrinsic.
static inline bool isIntrinsicFunction(Function *F)
{
return F->isIntrinsic() || F->getName().startswith("julia.");
}
CodeGenOpt::Level CodeGenOptLevelFor(int optlevel);
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