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codegen.cpp
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codegen.cpp
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// This file is a part of Julia. License is MIT: http://julialang.org/license
#include "llvm-version.h"
#include "platform.h"
#include "options.h"
#if defined(_OS_WINDOWS_)
// trick pre-llvm36 into skipping the generation of _chkstk calls
// since it has some codegen issues associated with them:
// (a) assumed to be within 32-bit offset
// (b) bad asm is generated for certain code patterns:
// see https://github.com/JuliaLang/julia/pull/11644#issuecomment-112276813
// also MCJIT debugging support on windows needs ELF (currently)
#define FORCE_ELF
#endif
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#include <llvm/ExecutionEngine/ExecutionEngine.h>
#include <llvm/ExecutionEngine/JITEventListener.h>
#include <llvm/IR/IntrinsicInst.h>
#ifdef LLVM38
#include <llvm/Analysis/BasicAliasAnalysis.h>
#include <llvm/Analysis/TypeBasedAliasAnalysis.h>
#endif
#ifdef LLVM37
#include "llvm/IR/LegacyPassManager.h"
#else
#include <llvm/PassManager.h>
#endif
#include <llvm/Target/TargetSubtargetInfo.h>
#include <llvm/Support/TargetRegistry.h>
#include <llvm/Analysis/Passes.h>
#include <llvm/Bitcode/ReaderWriter.h>
#ifdef LLVM37
#include <llvm/Analysis/TargetTransformInfo.h>
#include <llvm/Analysis/TargetLibraryInfo.h>
#else
#include <llvm/Target/TargetLibraryInfo.h>
#endif
#ifdef LLVM35
#include <llvm/IR/Verifier.h>
#include <llvm/Object/ObjectFile.h>
#include <llvm/IR/DIBuilder.h>
#include <llvm/Target/TargetMachine.h>
#include <llvm/AsmParser/Parser.h>
#else
#include <llvm/Assembly/Parser.h>
#include <llvm/Analysis/Verifier.h>
#endif
#include <llvm/DebugInfo/DIContext.h>
#include <llvm/IR/DerivedTypes.h>
#include <llvm/IR/LLVMContext.h>
#include <llvm/IR/Module.h>
#include <llvm/IR/Intrinsics.h>
#include <llvm/IR/Attributes.h>
#include <llvm/IR/IRBuilder.h>
#include <llvm/IR/MDBuilder.h>
#include <llvm/IR/Value.h>
#ifndef LLVM35
#include <llvm/DebugInfo.h>
#include <llvm/DIBuilder.h>
#endif
#include <llvm/Target/TargetOptions.h>
#include <llvm/Transforms/Scalar.h>
#include <llvm/Transforms/Utils/BasicBlockUtils.h>
#include <llvm/Transforms/Instrumentation.h>
#include <llvm/Transforms/Vectorize.h>
#include <llvm/Support/Host.h>
#include <llvm/Support/TargetSelect.h>
#include <llvm/Support/raw_ostream.h>
#include <llvm/Support/FormattedStream.h>
#include <llvm/Support/DynamicLibrary.h>
#include <llvm/Support/PrettyStackTrace.h>
#include <llvm/Support/SourceMgr.h>
#include <llvm/Support/CommandLine.h>
#include <llvm/Transforms/Utils/Cloning.h>
#if defined(USE_ORCJIT)
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
#include "llvm/ExecutionEngine/Orc/LazyEmittingLayer.h"
#include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/ObjectMemoryBuffer.h"
#elif defined(USE_MCJIT)
#include <llvm/ExecutionEngine/MCJIT.h>
#include <llvm/ExecutionEngine/SectionMemoryManager.h>
#include <llvm/ADT/DenseMapInfo.h>
#include <llvm/Object/ObjectFile.h>
#else
#include <llvm/ExecutionEngine/JIT.h>
#include <llvm/ExecutionEngine/JITMemoryManager.h>
#include <llvm/ExecutionEngine/Interpreter.h>
#endif
#if defined(_OS_WINDOWS_) && !defined(NOMINMAX)
#define NOMINMAX
#endif
#include "julia.h"
#include "julia_internal.h"
#include <setjmp.h>
#include <string>
#include <sstream>
#include <fstream>
#include <map>
#include <vector>
#include <set>
#include <cstdio>
#include <cassert>
using namespace llvm;
// LLVM version compatibility macros
#if LLVM37
using namespace llvm::legacy;
#define LLVM37_param(x) (x),
#else
#define LLVM37_param(x)
#endif
#ifndef LLVM35
#define AddrSpaceCastInst BitCastInst
#endif
extern "C" {
#include "builtin_proto.h"
#ifdef HAVE_SSP
extern uintptr_t __stack_chk_guard;
extern void __stack_chk_fail();
#else
DLLEXPORT uintptr_t __stack_chk_guard = (uintptr_t)0xBAD57ACCBAD67ACC; // 0xBADSTACKBADSTACK
DLLEXPORT void __stack_chk_fail()
{
/* put your panic function or similar in here */
fprintf(stderr, "fatal error: stack corruption detected\n");
abort(); // end with abort, since the compiler destroyed the stack upon entry to this function, there's no going back now
}
#endif
#ifdef _OS_WINDOWS_
#if defined(_CPU_X86_64_)
#if defined(_COMPILER_MINGW_)
extern void ___chkstk_ms(void);
#else
extern void __chkstk(void);
#endif
#else
#if defined(_COMPILER_MINGW_)
#undef _alloca
extern void _alloca(void);
#else
extern void _chkstk(void);
#endif
#endif
//void *force_chkstk(void) {
// return alloca(40960);
//}
#endif
}
#if defined(_COMPILER_MICROSOFT_) && !defined(__alignof__)
#define __alignof__ __alignof
#endif
#define DISABLE_FLOAT16
// llvm state
DLLEXPORT LLVMContext &jl_LLVMContext = getGlobalContext();
static IRBuilder<> builder(getGlobalContext());
static bool nested_compile = false;
static TargetMachine *jl_TargetMachine;
#ifdef USE_ORCJIT
template <typename T>
static std::vector<T> singletonSet(T t) {
std::vector<T> Vec;
Vec.push_back(std::move(t));
return Vec;
}
class JuliaOJIT {
public:
typedef orc::ObjectLinkingLayer<> ObjLayerT;
typedef orc::IRCompileLayer<ObjLayerT> CompileLayerT;
typedef CompileLayerT::ModuleSetHandleT ModuleHandleT;
typedef StringMap<void*> GlobalSymbolTableT;
JuliaOJIT(TargetMachine &TM)
: TM(TM),
DL(TM.createDataLayout()),
CompileLayer(ObjectLayer, JITCompiler(*this)) {
// Make sure SectionMemoryManager::getSymbolAddressInProcess can resolve
// symbols in the program as well. The nullptr argument to the function
// tells DynamicLibrary to load the program, not a library.
std::string *ErrorStr = nullptr;
if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr, ErrorStr))
report_fatal_error("FATAL: unable to dlopen self\n" + *ErrorStr);
}
std::string mangle(const std::string &Name) {
std::string MangledName;
{
raw_string_ostream MangledNameStream(MangledName);
Mangler::getNameWithPrefix(MangledNameStream, Name, DL);
}
return MangledName;
}
void addGlobalMapping(StringRef Name, void *Addr) {
GlobalSymbolTable[mangle(Name)] = Addr;
}
ModuleHandleT addModule(Module *M) {
// We need a memory manager to allocate memory and resolve symbols for this
// new module. Create one that resolves symbols by looking back into the
// JIT.
auto Resolver = orc::createLambdaResolver(
[&](const std::string &Name) {
// TODO: consider moving the FunctionMover resolver here
// Step 0: ObjectLinkingLayer has checked whether it is in the current module
// Step 1: Check against list of known external globals
GlobalSymbolTableT::const_iterator pos = GlobalSymbolTable.find(Name);
if (pos != GlobalSymbolTable.end())
return RuntimeDyld::SymbolInfo((intptr_t)pos->second, JITSymbolFlags::Exported);
// Step 2: Search all previously emitted symbols
if (auto Sym = findSymbol(Name))
return RuntimeDyld::SymbolInfo(Sym.getAddress(),
Sym.getFlags());
// Step 2: Search the program symbols
if (uint64_t addr = SectionMemoryManager::getSymbolAddressInProcess(Name))
return RuntimeDyld::SymbolInfo(addr, JITSymbolFlags::Exported);
// Return failure code
return RuntimeDyld::SymbolInfo(nullptr);
},
[](const std::string &S) { return nullptr; }
);
return CompileLayer.addModuleSet(singletonSet(std::move(M)),
&MemMgr,
std::move(Resolver));
}
void removeModule(ModuleHandleT H) { CompileLayer.removeModuleSet(H); }
orc::JITSymbol findSymbol(const std::string &Name) {
return CompileLayer.findSymbol(Name, true);
}
orc::JITSymbol findUnmangledSymbol(const std::string Name) {
return findSymbol(mangle(Name));
}
uint64_t getGlobalValueAddress(const std::string &Name) {
return CompileLayer.findSymbol(mangle(Name), false).getAddress();
}
uint64_t getFunctionAddress(const std::string &Name) {
return CompileLayer.findSymbol(mangle(Name), false).getAddress();
}
uint64_t FindFunctionNamed(const std::string &Name) {
return 0; // Functions are not kept around
}
void RegisterJITEventListener(JITEventListener *L) {
// TODO
}
const DataLayout& getDataLayout() const {
return DL;
}
const Triple& getTargetTriple() const {
return TM.getTargetTriple();
}
private:
TargetMachine &TM;
const DataLayout DL;
SectionMemoryManager MemMgr;
ObjLayerT ObjectLayer;
CompileLayerT CompileLayer;
GlobalSymbolTableT GlobalSymbolTable;
/// Simple compile functor: Takes a single IR module and returns an ObjectFile.
class JITCompiler {
public:
/// Construct a simple compile functor with the given target.
JITCompiler(JuliaOJIT &JIT) : JIT(JIT) { }
/// Compile a Module to an ObjectFile.
object::OwningBinary<object::ObjectFile> operator()(Module &M) const {
MCContext *Ctx;
SmallVector<char, 0> ObjBufferSV;
raw_svector_ostream ObjStream(ObjBufferSV);
legacy::PassManager PM;
if (JIT.TM.addPassesToEmitMC(PM, Ctx, ObjStream))
llvm_unreachable("Target does not support MC emission.");
PM.run(M);
ObjStream.flush();
std::unique_ptr<MemoryBuffer> ObjBuffer(
new ObjectMemoryBuffer(std::move(ObjBufferSV)));
ErrorOr<std::unique_ptr<object::ObjectFile>> Obj =
object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
// TODO: Actually report errors helpfully.
typedef object::OwningBinary<object::ObjectFile> OwningObj;
if (Obj)
return OwningObj(std::move(*Obj), std::move(ObjBuffer));
return OwningObj(nullptr, nullptr);
}
private:
JuliaOJIT &JIT;
};
};
DLLEXPORT JuliaOJIT *jl_ExecutionEngine;
#else
DLLEXPORT ExecutionEngine *jl_ExecutionEngine;
#endif
#ifdef USE_MCJIT
static Module *shadow_module;
static RTDyldMemoryManager *jl_mcjmm;
#define jl_Module (builder.GetInsertBlock()->getParent()->getParent())
#else
static Module *jl_Module;
#define shadow_module jl_Module
#endif
static MDBuilder *mbuilder;
static std::map<int, std::string> argNumberStrings;
#ifdef LLVM38
static legacy::FunctionPassManager *FPM;
#else
static FunctionPassManager *FPM;
#endif
#ifdef LLVM37
// No DataLayout pass needed anymore.
#elif LLVM35
static DataLayoutPass *jl_data_layout;
#else
static DataLayout *jl_data_layout;
#endif
// for image reloading
static bool imaging_mode = false;
// types
static Type *T_jlvalue;
static Type *T_pjlvalue;
static Type *T_ppjlvalue;
static Type* jl_parray_llvmt;
static FunctionType *jl_func_sig;
static Type *jl_pfptr_llvmt;
static IntegerType *T_int1;
static IntegerType *T_int8;
static IntegerType *T_int16;
static IntegerType *T_int32;
static IntegerType *T_int64;
static IntegerType *T_uint8;
static IntegerType *T_uint16;
static IntegerType *T_uint32;
static IntegerType *T_uint64;
static IntegerType *T_char;
static IntegerType *T_size;
static Type *T_float32;
static Type *T_float64;
static Type *T_pint8;
static Type *T_pint16;
static Type *T_pint32;
static Type *T_pint64;
static Type *T_psize;
static Type *T_pfloat32;
static Type *T_pfloat64;
static Type *T_ppint8;
static Type *T_pppint8;
static Type *T_void;
// type-based alias analysis nodes. Indentation of comments indicates hierarchy.
static MDNode* tbaa_user; // User data that is mutable
static MDNode* tbaa_immut; // User data inside a heap-allocated immutable
static MDNode* tbaa_value; // Julia value
static MDNode* tbaa_array; // Julia array
static MDNode* tbaa_arrayptr; // The pointer inside a jl_array_t
static MDNode* tbaa_arraysize; // A size in a jl_array_t
static MDNode* tbaa_arraylen; // The len in a jl_array_t
static MDNode* tbaa_sveclen; // The len in a jl_svec_t
static MDNode* tbaa_func; // A jl_function_t
static MDNode* tbaa_datatype; // A jl_datatype_t
static MDNode* tbaa_const; // Memory that is immutable by the time LLVM can see it
namespace llvm {
extern Pass *createLowerSimdLoopPass();
extern bool annotateSimdLoop( BasicBlock* latch );
}
// Basic DITypes
#ifdef LLVM37
static DICompositeType *jl_value_dillvmt;
static DIDerivedType *jl_pvalue_dillvmt;
static DIDerivedType *jl_ppvalue_dillvmt;
static DISubroutineType *jl_di_func_sig;
#else
static DICompositeType jl_value_dillvmt;
static DIDerivedType jl_pvalue_dillvmt;
static DIDerivedType jl_ppvalue_dillvmt;
#ifdef LLVM36
DISubroutineType jl_di_func_sig;
#else
DICompositeType jl_di_func_sig;
#endif
#endif
// constants
static Value *V_null;
static Type *NoopType;
static Value *literal_pointer_val(jl_value_t *p);
extern "C" {
DLLEXPORT Type *julia_type_to_llvm(jl_value_t *jt, bool *isboxed=NULL);
}
static bool type_is_ghost(Type *ty)
{
return (ty == T_void || ty->isEmptyTy());
}
// global vars
static GlobalVariable *jltrue_var;
static GlobalVariable *jlfalse_var;
static GlobalVariable *jlemptysvec_var;
static GlobalVariable *jlemptytuple_var;
#if defined(_CPU_X86_)
#define JL_NEED_FLOATTEMP_VAR 1
#endif
#if JL_NEED_FLOATTEMP_VAR
static GlobalVariable *jlfloattemp_var;
#endif
static GlobalVariable *jlpgcstack_var;
static GlobalVariable *jlexc_var;
static GlobalVariable *jldiverr_var;
static GlobalVariable *jlundeferr_var;
static GlobalVariable *jldomerr_var;
static GlobalVariable *jlovferr_var;
static GlobalVariable *jlinexacterr_var;
static GlobalVariable *jlRTLD_DEFAULT_var;
#ifdef _OS_WINDOWS_
static GlobalVariable *jlexe_var;
static GlobalVariable *jldll_var;
#if defined(_CPU_X86_64_) && !defined(USE_MCJIT)
extern JITMemoryManager* createJITMemoryManagerWin();
#endif
#endif //_OS_WINDOWS_
#if defined(_OS_DARWIN_) && defined(LLVM37) && defined(LLVM_SHLIB)
#define CUSTOM_MEMORY_MANAGER 1
extern RTDyldMemoryManager* createRTDyldMemoryManagerOSX();
#endif
// important functions
static Function *jlnew_func;
static Function *jlthrow_func;
static Function *jlerror_func;
static Function *jltypeerror_func;
static Function *jlundefvarerror_func;
static Function *jlboundserror_func;
static Function *jluboundserror_func;
static Function *jlvboundserror_func;
static Function *jlboundserrorv_func;
static Function *jlcheckassign_func;
static Function *jldeclareconst_func;
static Function *jlgetbindingorerror_func;
static Function *jltopeval_func;
static Function *jlcopyast_func;
static Function *jltuple_func;
static Function *jlnsvec_func;
static Function *jlapplygeneric_func;
static Function *jlgetfield_func;
static Function *jlbox_func;
static Function *jlclosure_func;
static Function *jlmethod_func;
static Function *jlgenericfunction_func;
static Function *jlenter_func;
static Function *jlleave_func;
static Function *jlegal_func;
static Function *jlallocobj_func;
static Function *jlalloc1w_func;
static Function *jlalloc2w_func;
static Function *jlalloc3w_func;
static Function *jl_alloc_svec_func;
static Function *jlsubtype_func;
static Function *setjmp_func;
static Function *memcmp_func;
static Function *box_int8_func;
static Function *box_uint8_func;
static Function *box_int16_func;
static Function *box_uint16_func;
static Function *box_int32_func;
static Function *box_char_func;
static Function *box_uint32_func;
static Function *box_int64_func;
static Function *box_uint64_func;
static Function *box_float32_func;
static Function *box_float64_func;
static Function *box_gensym_func;
static Function *box8_func;
static Function *box16_func;
static Function *box32_func;
static Function *box64_func;
static Function *wbfunc;
static Function *queuerootfun;
static Function *expect_func;
static Function *jldlsym_func;
static Function *jlnewbits_func;
static Function *jltypeassert_func;
#ifndef LLVM36
static Function *jlpow_func;
static Function *jlpowf_func;
#endif
//static Function *jlgetnthfield_func;
static Function *jlgetnthfieldchecked_func;
//static Function *jlsetnthfield_func;
#ifdef _OS_WINDOWS_
static Function *resetstkoflw_func;
#endif
static Function *diff_gc_total_bytes_func;
static std::vector<Type *> two_pvalue_llvmt;
static std::vector<Type *> three_pvalue_llvmt;
static std::map<jl_fptr_t, Function*> builtin_func_map;
extern "C" DLLEXPORT void jl_gc_wb_slow(jl_value_t* parent, jl_value_t* ptr)
{
jl_gc_wb(parent, ptr);
}
// --- code generation ---
// metadata tracking for a llvm Value* during codegen
struct jl_cgval_t {
Value *V; // may be of type T* or T, or set to NULL if ghost (or if the value has not been initialized yet, for a variable definition)
jl_value_t *typ; // the original type of V, never NULL
//Type *T; // cached result of julia_type_to_llvm(typ)
bool isboxed; // whether this value is a jl_value_t* allocated on the heap with the right type tag
bool isghost; // whether this value is "ghost"
bool ispointer; // whether this value is actually pointer to the value
bool isimmutable; // V points to something that is definitely immutable (e.g. not stack allocated)
//bool isstack; // points to stack-allocated memory
//bool isarg; // derived from an argument
mutable bool needsgcroot; // this value needs a gcroot
jl_cgval_t(Value *V, bool isboxed, jl_value_t *typ) : // general constructor (with pointer type auto-detect)
V(V), // V is allowed to be NULL in a jl_varinfo_t context, but not during codegen contexts
typ(typ),
//T(julia_type_to_llvm(typ)),
isboxed(isboxed),
isghost(false),
ispointer(this->isboxed),
isimmutable(this->isboxed && jl_is_immutable_datatype(typ)),
needsgcroot(this->isboxed)
{
}
jl_cgval_t(jl_value_t *typ) : // ghost value constructor
V(NULL),
typ(typ),
//T(T_void),
isboxed(false),
isghost(true),
ispointer(false),
isimmutable(true),
needsgcroot(false)
{
}
jl_cgval_t(const jl_cgval_t &v, jl_value_t *typ) : // copy constructor with new type
V(v.V),
typ(typ),
//T(V.T),
isboxed(v.isboxed),
isghost(v.isghost),
ispointer(v.ispointer),
isimmutable(v.isimmutable),
needsgcroot(v.needsgcroot)
{
assert(isboxed || v.typ == typ); // expect a badly or equivalently typed version
}
jl_cgval_t() : // undef / unreachable / default constructor
V(UndefValue::get(T_void)),
typ(jl_bottom_type), // TODO: jl_bottom_type?
isboxed(false),
isghost(true),
ispointer(false),
isimmutable(true),
needsgcroot(false)
{
}
};
// per-local-variable information
struct jl_varinfo_t {
Value *memloc; // an address, if the var is in a jl_value_t* gc stack slot or jl_box_t* Box object (marked tbaa_const, if appropriate)
jl_cgval_t value; // a value, if the var is unboxed or SSA (and thus memloc == NULL)
#ifdef LLVM37
DILocalVariable *dinfo;
#else
DIVariable dinfo;
#endif
int closureidx; // index in closure env, or -1
bool isAssigned;
bool isCaptured;
bool isSA;
bool isVolatile;
bool isArgument;
bool isBox;
bool hasGCRoot;
bool escapes;
bool usedUndef;
bool used;
jl_varinfo_t() : memloc(NULL), value(jl_cgval_t()),
#ifdef LLVM37
dinfo(NULL),
#else
dinfo(DIVariable()),
#endif
closureidx(-1), isAssigned(true), isCaptured(false), isSA(false),
isVolatile(false), isArgument(false), isBox(false), hasGCRoot(false),
escapes(true), usedUndef(false), used(false)
{
}
};
// --- helpers for reloading IR image
static void jl_dump_shadow(char *fname, int jit_model, const char *sysimg_data, size_t sysimg_len, bool dump_as_bc);
extern "C"
void jl_dump_bitcode(char *fname, const char *sysimg_data, size_t sysimg_len)
{
jl_dump_shadow(fname, 0, sysimg_data, sysimg_len, true);
}
extern "C"
void jl_dump_objfile(char *fname, int jit_model, const char *sysimg_data, size_t sysimg_len)
{
jl_dump_shadow(fname, jit_model, sysimg_data, sysimg_len, false);
}
// aggregate of array metadata
typedef struct {
Value *dataptr;
Value *len;
std::vector<Value*> sizes;
jl_value_t *ty;
} jl_arrayvar_t;
struct jl_gcinfo_t {
AllocaInst *gcframe;
Value *argSlot;
GetElementPtrInst *tempSlot;
int argDepth;
int maxDepth;
int argSpaceSize;
BasicBlock::iterator first_gcframe_inst;
BasicBlock::iterator last_gcframe_inst;
};
// information about the context of a piece of code: its enclosing
// function and module, and visible local variables and labels.
typedef struct {
Function *f;
// local var info. globals are not in here.
// NOTE: you must be careful not to access vars[s] before you are sure "s" is
// a local, since otherwise this will add it to the map.
std::map<jl_sym_t*, jl_varinfo_t> vars;
std::vector<jl_cgval_t> gensym_SAvalues;
std::vector<bool> gensym_assigned;
std::map<jl_sym_t*, jl_arrayvar_t> *arrayvars;
std::map<int, BasicBlock*> *labels;
std::map<int, Value*> *handlers;
jl_module_t *module;
jl_expr_t *ast;
jl_svec_t *sp;
jl_lambda_info_t *linfo;
Value *argArray;
Value *argCount;
std::string funcName;
jl_sym_t *vaName; // name of vararg argument
bool vaStack; // varargs stack-allocated
bool sret;
int nReqArgs;
std::vector<bool> boundsCheck;
jl_gcinfo_t gc;
llvm::DIBuilder *dbuilder;
bool debug_enabled;
std::vector<CallInst*> to_inline;
} jl_codectx_t;
typedef struct {
size_t len;
struct {
int64_t isref;
Function *f;
} data[];
} cFunctionList_t;
static jl_cgval_t emit_expr(jl_value_t *expr, jl_codectx_t *ctx, bool boxed=true,
bool valuepos=true);
static jl_cgval_t emit_unboxed(jl_value_t *e, jl_codectx_t *ctx);
static int is_global(jl_sym_t *s, jl_codectx_t *ctx);
static Value *make_gcroot(Value *v, jl_codectx_t *ctx);
static jl_cgval_t emit_boxed_rooted(jl_value_t *e, jl_codectx_t *ctx);
static Value *global_binding_pointer(jl_module_t *m, jl_sym_t *s,
jl_binding_t **pbnd, bool assign, jl_codectx_t *ctx);
static jl_cgval_t emit_checked_var(Value *bp, jl_sym_t *name, jl_codectx_t *ctx, bool isvol=false);
static bool might_need_root(jl_value_t *ex);
static Value *emit_condition(jl_value_t *cond, const std::string &msg, jl_codectx_t *ctx);
static void allocate_gc_frame(size_t n_roots, BasicBlock *b0, jl_codectx_t *ctx);
static void finalize_gc_frame(jl_codectx_t *ctx);
// --- convenience functions for tagging llvm values with julia types ---
static AllocaInst *emit_static_alloca(Type *lty, int arraysize, jl_codectx_t *ctx)
{
return new AllocaInst(lty, ConstantInt::get(T_int32, arraysize), "", /*InsertBefore=*/ctx->gc.gcframe);
}
static AllocaInst *emit_static_alloca(Type *lty, jl_codectx_t *ctx)
{
return emit_static_alloca(lty, 1, ctx);
}
static AllocaInst *emit_static_alloca(Type *lty)
{
return new AllocaInst(lty, "",
/*InsertBefore=*/builder.GetInsertBlock()->getParent()->getEntryBlock().getFirstInsertionPt());
}
static inline jl_cgval_t ghostValue(jl_value_t *typ)
{
assert(typ == jl_bottom_type || (jl_is_datatype(typ) && jl_datatype_size(typ) == 0));
return jl_cgval_t(typ);
}
static inline jl_cgval_t ghostValue(jl_datatype_t *typ)
{
return ghostValue((jl_value_t*)typ);
}
static inline jl_cgval_t mark_julia_slot(Value *v, jl_value_t *typ)
{
// eagerly put this back onto the stack
assert(v->getType() != T_pjlvalue);
jl_cgval_t tagval(v, false, typ);
tagval.ispointer = true;
return tagval;
}
static inline jl_cgval_t mark_julia_type(Value *v, bool isboxed, jl_value_t *typ)
{
Type *T = julia_type_to_llvm(typ);
if (type_is_ghost(T)) {
return ghostValue(typ);
}
if (v && T->isAggregateType() && !isboxed) {
assert(v->getType() != T_pjlvalue);
// eagerly put this back onto the stack
// llvm mem2reg pass will remove this if unneeded
Value *loc = emit_static_alloca(T);
builder.CreateStore(v, loc);
return mark_julia_slot(loc, typ);
}
return jl_cgval_t(v, isboxed, typ);
}
static inline jl_cgval_t mark_julia_type(Value *v, bool isboxed, jl_datatype_t *typ)
{
return mark_julia_type(v, isboxed, (jl_value_t*)typ);
}
static inline jl_cgval_t remark_julia_type(const jl_cgval_t &v, jl_value_t *typ)
{
Type *T = julia_type_to_llvm(typ);
if (type_is_ghost(T)) {
return ghostValue(typ);
}
return jl_cgval_t(v, typ);
}
static inline jl_cgval_t mark_julia_const(jl_value_t *jv)
{
jl_value_t *typ;
if (jl_is_datatype(jv) || jl_is_uniontype(jv) || jl_is_typector(jv))
typ = (jl_value_t*)jl_wrap_Type(jv);
else
typ = jl_typeof(jv);
if (type_is_ghost(julia_type_to_llvm(typ))) {
return ghostValue(typ);
}
jl_cgval_t constant(literal_pointer_val(jv), true, typ);
constant.needsgcroot = false;
return constant;
}
// --- utilities ---
extern "C" {
int globalUnique = 0;
}
static void emit_write_barrier(jl_codectx_t*, Value*, Value*);
#include "cgutils.cpp"
static void jl_rethrow_with_add(const char *fmt, ...)
{
if (jl_typeis(jl_exception_in_transit, jl_errorexception_type)) {
char *str = jl_string_data(jl_fieldref(jl_exception_in_transit,0));
char buf[1024];
va_list args;
va_start(args, fmt);
int nc = vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
nc += snprintf(buf+nc, sizeof(buf)-nc, ": %s", str);
jl_value_t *msg = jl_pchar_to_string(buf, nc);
JL_GC_PUSH1(&msg);
jl_throw(jl_new_struct(jl_errorexception_type, msg));
}
jl_rethrow();
}
// --- allocating local variables ---
static bool isbits_spec(jl_value_t *jt, bool allow_unsized = true)
{
return jl_isbits(jt) && jl_is_leaf_type(jt) && (allow_unsized ||
((jl_is_bitstype(jt) && jl_datatype_size(jt) > 0) ||
(jl_is_datatype(jt) && jl_datatype_nfields(jt)>0)));
}
static bool store_unboxed_p(jl_value_t *jt)
{
return (isbits_spec(jt,false) &&
// don't unbox intrinsics, since inference depends on their having
// stable addresses for table lookup.
jt != (jl_value_t*)jl_intrinsic_type);
}
static bool store_unboxed_p(jl_sym_t *s, jl_codectx_t *ctx)
{
jl_varinfo_t &vi = ctx->vars[s];
// only store a variable unboxed if type inference has run, which
// checks that the variable is not referenced undefined.
return (ctx->linfo->inferred && !vi.isCaptured && !vi.usedUndef &&
// don't unbox vararg tuples
s != ctx->vaName && store_unboxed_p(vi.value.typ));
}
static void alloc_local(jl_sym_t *s, jl_codectx_t *ctx)
{
jl_varinfo_t &vi = ctx->vars[s];
jl_value_t *jt = vi.value.typ;
assert(store_unboxed_p(s,ctx));
Type *vtype = julia_type_to_llvm(jt);
assert(vtype != T_pjlvalue);
if (type_is_ghost(vtype)) {
vi.value = ghostValue(jt);
return;
}
// CreateAlloca is OK here because alloc_local is only called during prologue setup
Value *lv = builder.CreateAlloca(vtype, 0, s->name);
vi.value = mark_julia_slot(lv, jt);
vi.value.isimmutable &= vi.isSA; // slot is not immutable if there are multiple assignments
assert(vi.value.isboxed == false);
#ifdef LLVM36
if (ctx->debug_enabled) {
#ifdef LLVM37
ctx->dbuilder->insertDeclare(lv, vi.dinfo, ctx->dbuilder->createExpression(),
builder.getCurrentDebugLocation().get(), builder.GetInsertBlock());
#else
ctx->dbuilder->insertDeclare(lv, vi.dinfo, ctx->dbuilder->createExpression(),
builder.GetInsertBlock());
#endif
}
#endif
}
static void maybe_alloc_arrayvar(jl_sym_t *s, jl_codectx_t *ctx)
{
jl_value_t *jt = ctx->vars[s].value.typ;
if (jl_is_array_type(jt) && jl_is_leaf_type(jt) && jl_is_long(jl_tparam1(jt)) &&
jl_unbox_long(jl_tparam1(jt)) != 1) {
// TODO: this optimization does not yet work with 1-d arrays, since the
// length and data pointer can change at any time via push!
// we could make it work by reloading the metadata when the array is
// passed to an external function (ideally only impure functions)
jl_arrayvar_t av;
int ndims = jl_unbox_long(jl_tparam1(jt));
Type *elt = julia_type_to_llvm(jl_tparam0(jt));
if (type_is_ghost(elt))
return;
// CreateAlloca is OK here because maybe_alloc_arrayvar is only called in the prologue setup
av.dataptr = builder.CreateAlloca(PointerType::get(elt,0));
av.len = builder.CreateAlloca(T_size);
for(int i=0; i < ndims-1; i++)
av.sizes.push_back(builder.CreateAlloca(T_size));
av.ty = jt;
(*ctx->arrayvars)[s] = av;
}
}
JL_DEFINE_MUTEX_EXT(codegen)
// Snooping on which functions are being compiled, and how long it takes
JL_STREAM *dump_compiles_stream = NULL;
uint64_t last_time = 0;
extern "C" DLLEXPORT
void jl_dump_compiles(void *s)
{
dump_compiles_stream = (JL_STREAM*)s;
}
// --- entry point ---
//static int n_emit=0;
static Function *emit_function(jl_lambda_info_t *lam);
static void jl_finalize_module(Module *m);
//static int n_compile=0;
static Function *to_function(jl_lambda_info_t *li)
{
JL_LOCK(codegen)
JL_SIGATOMIC_BEGIN();
assert(!li->inInference);
BasicBlock *old = nested_compile ? builder.GetInsertBlock() : NULL;
DebugLoc olddl = builder.getCurrentDebugLocation();
bool last_n_c = nested_compile;
if (!nested_compile && dump_compiles_stream != NULL)
last_time = jl_hrtime();
nested_compile = true;
jl_gc_inhibit_finalizers(nested_compile);
Function *f = NULL;
JL_TRY {
f = emit_function(li);
//n_emit++;
}
JL_CATCH {
li->functionObject = NULL;
li->specFunctionObject = NULL;
li->cFunctionList = NULL;
nested_compile = last_n_c;
if (old != NULL) {
builder.SetInsertPoint(old);
builder.SetCurrentDebugLocation(olddl);
}
JL_SIGATOMIC_END();
JL_UNLOCK(codegen)
jl_rethrow_with_add("error compiling %s", li->name->name);
}
assert(f != NULL);
#ifdef JL_DEBUG_BUILD
#ifdef LLVM35
llvm::raw_fd_ostream out(1,false);
#endif
if (
#ifdef LLVM35
verifyFunction(*f,&out)
#else
verifyFunction(*f,PrintMessageAction)
#endif
) {
f->dump();
abort();
}
#endif
FPM->run(*f);
if (!imaging_mode) {
jl_finalize_module(f->getParent());
}
//n_compile++;
// print out the function's LLVM code
//jl_static_show(JL_STDERR, (jl_value_t*)li);
//jl_printf(JL_STDERR, "%s:%d\n",
// ((jl_sym_t*)li->file)->name, li->line);
//f->dump();
//if (verifyFunction(*f,PrintMessageAction)) {
// f->dump();
// abort();
//}
if (old != NULL) {
builder.SetInsertPoint(old);
builder.SetCurrentDebugLocation(olddl);
}
nested_compile = last_n_c;