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codegen.cpp
6353 lines (5931 loc) · 242 KB
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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_) && JL_LLVM_VERSION < 30900
// trick pre-llvm39 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, use ELF because RuntimeDyld COFF I686 support didn't exist
// also, use ELF because RuntimeDyld COFF X86_64 doesn't seem to work (fails to generate function pointers)?
#define FORCE_ELF
#endif
#if defined(_CPU_X86_)
#define JL_NEED_FLOATTEMP_VAR 1
#endif
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#include <setjmp.h>
#include <string>
#include <sstream>
#include <fstream>
#include <map>
#include <vector>
#include <set>
#include <cstdio>
#include <cassert>
#include <iostream>
// target machine computation
#include <llvm/Target/TargetSubtargetInfo.h>
#include <llvm/Support/TargetRegistry.h>
#if JL_LLVM_VERSION < 30700
#include <llvm/Target/TargetLibraryInfo.h>
#endif
#include <llvm/Target/TargetOptions.h>
#include <llvm/Support/Host.h>
#include <llvm/Support/TargetSelect.h>
#if JL_LLVM_VERSION >= 30700
#include <llvm/Analysis/TargetLibraryInfo.h>
#endif
#if JL_LLVM_VERSION >= 30700
#include <llvm/Object/SymbolSize.h>
#endif
// IR building
#include <llvm/IR/IntrinsicInst.h>
#if JL_LLVM_VERSION >= 30500
#include <llvm/Object/ObjectFile.h>
#include <llvm/IR/DIBuilder.h>
#include <llvm/AsmParser/Parser.h>
#else
#include <llvm/Assembly/Parser.h>
#endif
#include <llvm/DebugInfo/DIContext.h>
#include <llvm/IR/DerivedTypes.h>
#include <llvm/IR/Intrinsics.h>
#include <llvm/IR/Attributes.h>
#include <llvm/IR/IRBuilder.h>
#include <llvm/IR/MDBuilder.h>
#if JL_LLVM_VERSION < 30500
#include <llvm/DebugInfo.h>
#include <llvm/DIBuilder.h>
#endif
// support
#include <llvm/Support/raw_ostream.h>
#include <llvm/Support/FormattedStream.h>
#include <llvm/Support/SourceMgr.h> // for llvmcall
#include <llvm/Transforms/Utils/Cloning.h> // for llvmcall inlining
#if JL_LLVM_VERSION >= 30500
#include <llvm/IR/Verifier.h> // for llvmcall validation
#else
#include <llvm/Analysis/Verifier.h>
#endif
// C API
#if JL_LLVM_VERSION >= 30800
#include <llvm-c/Types.h>
#else
#include <llvm-c/Core.h>
#endif
// for configuration options
#include <llvm/Support/PrettyStackTrace.h>
#include <llvm/Support/CommandLine.h>
#if defined(_CPU_ARM_) || defined(_CPU_AARCH64_)
# include <llvm/IR/InlineAsm.h>
# include <sys/utsname.h>
#endif
#if defined(USE_POLLY)
#include <polly/RegisterPasses.h>
#include <polly/ScopDetection.h>
#endif
using namespace llvm;
namespace llvm {
extern bool annotateSimdLoop(BasicBlock *latch);
}
#if defined(_OS_WINDOWS_) && !defined(NOMINMAX)
#define NOMINMAX
#endif
#include "julia.h"
#include "julia_internal.h"
#include "jitlayers.h"
#include "codegen_internal.h"
// LLVM version compatibility macros
#if JL_LLVM_VERSION >= 30700
legacy::PassManager *jl_globalPM;
#define LLVM37_param(x) (x),
#else
#define LLVM37_param(x)
PassManager *jl_globalPM;
#endif
#if JL_LLVM_VERSION >= 40000
#define DIFlagZero (DINode::FlagZero)
#else
#define DIFlagZero (0)
#endif
#if JL_LLVM_VERSION < 30500
#define AddrSpaceCastInst BitCastInst
#endif
#if !defined(_COMPILER_MICROSOFT_) && __cplusplus < 201103L && !defined(static_assert)
# define static_assert(...)
#endif
extern "C" {
#include "builtin_proto.h"
#ifdef HAVE_SSP
extern uintptr_t __stack_chk_guard;
extern void __stack_chk_fail();
#else
JL_DLLEXPORT uintptr_t __stack_chk_guard = (uintptr_t)0xBAD57ACCBAD67ACC; // 0xBADSTACKBADSTACK
JL_DLLEXPORT void __stack_chk_fail()
{
/* put your panic function or similar in here */
fprintf(stderr, "fatal error: stack corruption detected\n");
gc_debug_critical_error();
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
#if JL_LLVM_VERSION >= 30900
JL_DLLEXPORT LLVMContext jl_LLVMContext;
#else
JL_DLLEXPORT LLVMContext &jl_LLVMContext = getGlobalContext();
#endif
static IRBuilder<> builder(jl_LLVMContext);
static bool nested_compile = false;
TargetMachine *jl_TargetMachine;
extern JITEventListener *CreateJuliaJITEventListener();
// for image reloading
bool imaging_mode = false;
Module *shadow_output;
#define jl_Module ctx->f->getParent()
#define jl_builderModule builder.GetInsertBlock()->getParent()->getParent()
#if JL_LLVM_VERSION >= 30700
// No DataLayout pass needed anymore.
#elif JL_LLVM_VERSION >= 30500
static DataLayoutPass *jl_data_layout;
#else
static DataLayout *jl_data_layout;
#endif
// types
static Type *T_jlvalue;
static Type *T_pjlvalue;
static Type *T_ppjlvalue;
static Type *jl_parray_llvmt;
static FunctionType *jl_func_sig;
static FunctionType *jl_func_sig_sparams;
static Type *T_pvoidfunc;
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 IntegerType *T_sigatomic;
static Type *T_float16;
static Type *T_float32;
static Type *T_float64;
static Type *T_float128;
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_gcframe; // GC frame
// LLVM should have enough info for alias analysis of non-gcframe stack slot
// this is mainly a place holder for `jl_cgval_t::tbaa`
static MDNode *tbaa_stack; // stack slot
static MDNode *tbaa_data; // Any user data that `pointerset/ref` are allowed to alias
static MDNode *tbaa_tag; // Type tag
static MDNode *tbaa_binding; // jl_binding_t::value
static MDNode *tbaa_value; // jl_value_t, that is not jl_array_t
static MDNode *tbaa_mutab; // mutable type
static MDNode *tbaa_immut; // immutable type
static MDNode *tbaa_arraybuf; // Data in an array
static MDNode *tbaa_array; // jl_array_t
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_arrayflags; // The flags in a jl_array_t
static MDNode *tbaa_const; // Memory that is immutable by the time LLVM can see it
// Basic DITypes
#if JL_LLVM_VERSION >= 30700
static DICompositeType *jl_value_dillvmt;
static DIDerivedType *jl_pvalue_dillvmt;
static DIDerivedType *jl_ppvalue_dillvmt;
static DISubroutineType *jl_di_func_sig;
static DISubroutineType *jl_di_func_null_sig;
#else
static DICompositeType jl_value_dillvmt;
static DIDerivedType jl_pvalue_dillvmt;
static DIDerivedType jl_ppvalue_dillvmt;
#if JL_LLVM_VERSION >= 30600
DISubroutineType jl_di_func_sig;
DISubroutineType jl_di_func_null_sig;
#else
DICompositeType jl_di_func_sig;
DICompositeType jl_di_func_null_sig;
#endif
#endif
extern "C"
int32_t jl_jlcall_api(const void *function)
{
// give the function an index in the constant lookup table
if (function == NULL)
return 0;
const Function *F = (const Function*)function;
return (F->getFunctionType() == jl_func_sig ? 1 : 3);
}
// constants
static Value *V_null;
static Type *NoopType;
static Value *literal_pointer_val(jl_value_t *p);
extern "C" {
JL_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 *jlRTLD_DEFAULT_var;
#ifdef _OS_WINDOWS_
static GlobalVariable *jlexe_var;
static GlobalVariable *jldll_var;
#if defined(_CPU_X86_64_) && !defined(USE_MCJIT)
JITMemoryManager *createJITMemoryManagerWin();
#endif
#endif //_OS_WINDOWS_
static Function *jltls_states_func;
#ifndef JULIA_ENABLE_THREADING
static GlobalVariable *jltls_states_var;
#else
// Imaging mode only
static GlobalVariable *jltls_states_func_ptr = NULL;
size_t jltls_states_func_idx = 0;
#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 *jlpref_func;
static Function *jlpset_func;
static Function *jltopeval_func;
static Function *jlcopyast_func;
static Function *jltuple_func;
static Function *jlnsvec_func;
static Function *jlapplygeneric_func;
static Function *jlinvoke_func;
static Function *jlapply2va_func;
static Function *jlgetfield_func;
static Function *jlmethod_func;
static Function *jlgenericfunction_func;
static Function *jlenter_func;
static Function *jlleave_func;
static Function *jlegal_func;
static Function *jlalloc_pool_func;
static Function *jlalloc_big_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_ssavalue_func;
static Function *box8_func;
static Function *box16_func;
static Function *box32_func;
static Function *box64_func;
static Function *queuerootfun;
static Function *expect_func;
static Function *jldlsym_func;
static Function *jlnewbits_func;
static Function *jltypeassert_func;
#if JL_LLVM_VERSION < 30600
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;
#if defined(_CPU_X86_64_)
Function *juliapersonality_func;
#endif
#endif
static Function *diff_gc_total_bytes_func;
static Function *jlarray_data_owner_func;
// placeholder functions
static Function *gcroot_func;
static Function *gckill_func;
static Function *jlcall_frame_func;
static Function *gcroot_flush_func;
static Function *except_enter_func;
static std::vector<Type *> two_pvalue_llvmt;
static std::vector<Type *> three_pvalue_llvmt;
static std::vector<Type *> four_pvalue_llvmt;
static std::map<jl_fptr_t, Function*> builtin_func_map;
// --- code generation ---
extern "C" {
int globalUnique = 0;
}
// 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 *constant; // constant value (rooted in linfo.def.roots)
Value *gcroot; // the gcroot associated with V (if it has one)
jl_value_t *typ; // the original type of V, never NULL
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 isimmutable; // V points to something that is definitely immutable (e.g. single-assignment, but including memory)
MDNode *tbaa; // The related tbaa node. Non-NULL iff this is not a pointer.
bool ispointer() const
{
return tbaa != nullptr;
}
jl_cgval_t(Value *V, Value *gcroot, 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
constant(NULL),
gcroot(gcroot),
typ(typ),
isboxed(isboxed),
isghost(false),
isimmutable(isboxed && jl_is_immutable_datatype(typ)),
tbaa(isboxed ? (jl_is_leaf_type(typ) ?
(jl_is_mutable(typ) ? tbaa_mutab : tbaa_immut) :
tbaa_value) : nullptr)
{
}
jl_cgval_t(jl_value_t *typ) : // ghost value constructor
V(NULL),
constant(((jl_datatype_t*)typ)->instance),
gcroot(NULL),
typ(typ),
isboxed(false),
isghost(true),
isimmutable(true),
tbaa(nullptr)
{
assert(jl_is_datatype(typ));
assert(constant);
}
jl_cgval_t(const jl_cgval_t &v, jl_value_t *typ) : // copy constructor with new type
V(v.V),
constant(v.constant),
gcroot(v.gcroot),
typ(typ),
isboxed(v.isboxed),
isghost(v.isghost),
isimmutable(v.isimmutable),
tbaa(v.tbaa)
{
assert(isboxed || v.typ == typ); // expect a badly or equivalently typed version
}
jl_cgval_t() : // undef / unreachable / default constructor
V(UndefValue::get(T_void)),
constant(NULL),
gcroot(NULL),
typ(jl_bottom_type),
isboxed(false),
isghost(true),
isimmutable(true),
tbaa(nullptr)
{
}
};
// 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)
#if JL_LLVM_VERSION >= 30700
DILocalVariable *dinfo;
#else
DIVariable dinfo;
#endif
// if the variable might be used undefined and is not boxed
// this i1 flag is true when it is defined
Value *defFlag;
bool isSA;
bool isVolatile;
bool isArgument;
bool escapes;
bool usedUndef;
bool used;
jl_varinfo_t() : memloc(NULL), value(jl_cgval_t()),
#if JL_LLVM_VERSION >= 30700
dinfo(NULL),
#else
dinfo(DIVariable()),
#endif
defFlag(NULL),
isSA(false),
isVolatile(false), isArgument(false),
escapes(true), usedUndef(false), used(false)
{
}
};
// aggregate of array metadata
typedef struct {
Value *dataptr;
Value *len;
std::vector<Value*> sizes;
jl_value_t *ty;
} jl_arrayvar_t;
// 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.
std::vector<jl_varinfo_t> slots;
std::vector<jl_cgval_t> SAvalues;
std::vector<bool> ssavalue_assigned;
std::map<int, jl_arrayvar_t> *arrayvars;
jl_module_t *module;
jl_method_instance_t *linfo;
jl_code_info_t *source;
jl_array_t *code;
const char *name;
StringRef file;
ssize_t *line;
Value *spvals_ptr;
Value *argArray;
Value *argCount;
std::string funcName;
int vaSlot; // name of vararg argument
bool vaStack; // varargs stack-allocated
bool sret;
int nReqArgs;
int nargs;
CallInst *ptlsStates;
Value *signalPage;
bool debug_enabled;
bool is_inbounds{false};
jl_cgparams_t *params;
} jl_codectx_t;
static jl_cgval_t emit_expr(jl_value_t *expr, jl_codectx_t *ctx);
static Value *emit_local_root(jl_codectx_t *ctx, jl_varinfo_t *vi = NULL);
static void mark_gc_use(const jl_cgval_t &v);
static Value *make_jlcall(ArrayRef<const jl_cgval_t*> args, 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, MDNode *tbaa);
static Value *emit_condition(jl_value_t *cond, const std::string &msg, jl_codectx_t *ctx);
static void allocate_gc_frame(BasicBlock *b0, jl_codectx_t *ctx);
static GlobalVariable *prepare_global(GlobalVariable *G, Module *M = jl_builderModule);
static Value *prepare_call(Value *Callee);
static Value *prepare_call(IRBuilder<> &builder, Value *Callee);
template<typename T> static void push_gc_use(T &&vec, const jl_cgval_t &v)
{
if (v.gcroot) {
vec.push_back(v.gcroot);
}
}
template<typename T> static void mark_gc_uses(T &&vec)
{
auto f = prepare_call(gckill_func);
for (auto &v: vec) {
builder.CreateCall(f, v);
}
}
// --- 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->ptlsStates);
}
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)
{
if (typ == jl_bottom_type)
return jl_cgval_t(); // Undef{}
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, MDNode *tbaa)
{
// eagerly put this back onto the stack
assert(v->getType() != T_pjlvalue);
assert(tbaa);
jl_cgval_t tagval(v, NULL, false, typ);
tagval.tbaa = tbaa;
tagval.isimmutable = true;
return tagval;
}
static inline jl_cgval_t mark_julia_type(Value *v, bool isboxed, jl_value_t *typ, jl_codectx_t *ctx, bool needsroot = true)
{
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, tbaa_stack);
}
Value *froot = NULL;
if (needsroot && isboxed) {
froot = emit_local_root(ctx);
builder.CreateStore(v, froot);
}
return jl_cgval_t(v, froot, isboxed, typ);
}
static inline jl_cgval_t mark_julia_type(Value *v, bool isboxed, jl_datatype_t *typ, jl_codectx_t *ctx, bool needsroot = true)
{
return mark_julia_type(v, isboxed, (jl_value_t*)typ, ctx, needsroot);
}
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(NULL, NULL, true, typ);
constant.constant = jv;
return constant;
}
// --- utilities ---
static void emit_write_barrier(jl_codectx_t*, Value*, Value*);
#include "cgutils.cpp"
static void jl_rethrow_with_add(const char *fmt, ...)
{
jl_ptls_t ptls = jl_get_ptls_states();
if (jl_typeis(ptls->exception_in_transit, jl_errorexception_type)) {
char *str = jl_string_data(jl_fieldref(ptls->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();
}
static void CreateTrap(IRBuilder<> &builder)
{
Function *f = builder.GetInsertBlock()->getParent();
Function *trap_func = Intrinsic::getDeclaration(
f->getParent(),
Intrinsic::trap);
builder.CreateCall(trap_func);
builder.CreateUnreachable();
BasicBlock *newBB = BasicBlock::Create(builder.getContext(), "after_noret", f);
builder.SetInsertPoint(newBB);
}
// --- 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(int s, jl_codectx_t *ctx)
{
jl_varinfo_t &vi = ctx->slots[s];
// only store a variable unboxed if type inference has run, which
// checks that the variable is not referenced undefined.
return (ctx->source->inferred &&
// don't unbox vararg tuples
s != ctx->vaSlot && store_unboxed_p(vi.value.typ));
}
static jl_sym_t *slot_symbol(int s, jl_codectx_t *ctx)
{
return (jl_sym_t*)jl_array_ptr_ref(ctx->source->slotnames, s);
}
static void store_def_flag(const jl_varinfo_t &vi, bool val)
{
assert(!vi.memloc); // undefinedness is null pointer for boxed things
assert(vi.usedUndef && vi.defFlag);
builder.CreateStore(ConstantInt::get(T_int1, val), vi.defFlag);
}
static void alloc_def_flag(jl_varinfo_t& vi, jl_codectx_t* ctx)
{
assert(!vi.memloc); // same as above, not used for pointers
if (vi.usedUndef) {
vi.defFlag = emit_static_alloca(T_int1, ctx);
store_def_flag(vi, false);
}
}
static Value *alloc_local(int s, jl_codectx_t *ctx)
{
jl_varinfo_t &vi = ctx->slots[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 NULL;
}
// CreateAlloca is OK here because alloc_local is only called during prologue setup
Value *lv = builder.CreateAlloca(vtype, 0, jl_symbol_name(slot_symbol(s,ctx)));
vi.value = mark_julia_slot(lv, jt, tbaa_stack);
// slot is not immutable if there are multiple assignments
vi.value.isimmutable &= (vi.isSA && s >= ctx->nargs);
alloc_def_flag(vi, ctx);
assert(vi.value.isboxed == false);
return lv;
}
static void maybe_alloc_arrayvar(int s, jl_codectx_t *ctx)
{
jl_value_t *jt = ctx->slots[s].value.typ;
if (arraytype_constshape(jt)) {
// 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;
}
}
// 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" JL_DLLEXPORT
void jl_dump_compiles(void *s)
{
dump_compiles_stream = (JL_STREAM*)s;
}
// --- entry point ---
//static int n_emit=0;
static std::unique_ptr<Module> emit_function(jl_method_instance_t *lam, jl_code_info_t *src, jl_llvm_functions_t *declarations, jl_cgparams_t *params);
void jl_add_linfo_in_flight(StringRef name, jl_method_instance_t *linfo, const DataLayout &DL);
// this generates llvm code for the lambda info
// and adds the result to the jitlayers
// (and the shadow module), but doesn't yet compile
// or generate object code for it
extern "C"
jl_llvm_functions_t jl_compile_linfo(jl_method_instance_t *li, jl_code_info_t *src, jl_cgparams_t *params)
{
JL_TIMING(CODEGEN);
assert(jl_is_method_instance(li));
jl_llvm_functions_t decls = {};
// Step 1. See if it is already compiled,
// Get the codegen lock,
// And get the source
if (!src) {
// Step 1a. If the caller didn't provide the source,
// try to infer it for ourself
// first see if it is already compiled
decls = li->functionObjectsDecls;
if ((params->cached && decls.functionObject != NULL) || li->jlcall_api == 2) {
return decls;
}
JL_LOCK(&codegen_lock);
decls = li->functionObjectsDecls;
if ((params->cached && decls.functionObject != NULL) || li->jlcall_api == 2) {
JL_UNLOCK(&codegen_lock);
return decls;
}
// see if it is inferred
src = (jl_code_info_t*)li->inferred;
if (src) {
if (!jl_is_code_info(src)) {
src = jl_type_infer(li, 0);
}
if (!src || li->jlcall_api == 2) {
JL_UNLOCK(&codegen_lock);
return decls;
}
}
else {
// failed to compile
JL_UNLOCK(&codegen_lock);
return decls;
}
}
else {
// similar to above, but never returns a NULL
// decl (unless compile fails), even if jlcall_api == 2
decls = li->functionObjectsDecls;
if (params->cached && decls.functionObject != NULL) {
return decls;
}
JL_LOCK(&codegen_lock);
decls = li->functionObjectsDecls;
if (params->cached && decls.functionObject != NULL) {
JL_UNLOCK(&codegen_lock);
return decls;
}
}
JL_GC_PUSH1(&src);
assert(jl_is_code_info(src));
// Step 2: setup global state
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;
// Step 3. actually do the work of emitting the function
std::unique_ptr<Module> m;
Function *f = (Function*)decls.functionObject, *specf = (Function*)decls.specFunctionObject;
JL_TRY {
m = emit_function(li, src, &li->functionObjectsDecls, params);
decls = li->functionObjectsDecls;
//n_emit++;
}
JL_CATCH {
// something failed! this is very bad, since other WIP may be pointing to this function
// but there's not much we can do now. try to clear much of the WIP anyways.
li->functionObjectsDecls.functionObject = NULL;
li->functionObjectsDecls.specFunctionObject = NULL;
nested_compile = last_n_c;
if (old != NULL) {
builder.SetInsertPoint(old);
builder.SetCurrentDebugLocation(olddl);
}
JL_UNLOCK(&codegen_lock); // Might GC
jl_rethrow_with_add("error compiling %s", jl_symbol_name(li->def ? li->def->name : anonymous_sym));
}
if (!params->cached) {
li->functionObjectsDecls.functionObject = f;
li->functionObjectsDecls.specFunctionObject = specf;
}
f = (Function*)decls.functionObject;
specf = (Function*)decls.specFunctionObject;
// Step 4. Prepare debug info to receive this function
// record that this function name came from this linfo,
// so we can build a reverse mapping for debug-info.
bool toplevel = li->def == NULL;
if (!toplevel) {
const DataLayout &DL =
#if JL_LLVM_VERSION >= 30500
m->getDataLayout();
#else
*jl_data_layout;
#endif
// but don't remember toplevel thunks because
// they may not be rooted in the gc for the life of the program,
// and the runtime doesn't notify us when the code becomes unreachable :(
jl_add_linfo_in_flight((specf ? specf : f)->getName(), li, DL);
}
// Step 5. Add the result to the execution engine now
jl_finalize_module(m.release(), !toplevel);
if (li->jlcall_api != 2) {
// if not inlineable, code won't be needed again
if (JL_DELETE_NON_INLINEABLE && jl_options.debug_level <= 1 &&
li->def && li->inferred && jl_is_code_info(li->inferred) &&
!((jl_code_info_t*)li->inferred)->inlineable &&
li != li->def->unspecialized && !imaging_mode) {
li->inferred = jl_nothing;
}
}
// Step 6: Done compiling: Restore global state
if (old != NULL) {
builder.SetInsertPoint(old);
builder.SetCurrentDebugLocation(olddl);
}
nested_compile = last_n_c;
JL_UNLOCK(&codegen_lock); // Might GC
if (dump_compiles_stream != NULL) {
uint64_t this_time = jl_hrtime();
jl_printf(dump_compiles_stream, "%" PRIu64 "\t\"", this_time - last_time);
jl_static_show(dump_compiles_stream, (jl_value_t*)li);
jl_printf(dump_compiles_stream, "\"\n");
last_time = this_time;
}
JL_GC_POP();
return decls;
}
#if JL_LLVM_VERSION < 30700
static Value *getModuleFlag(Module *m, StringRef Key)
{
SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
m->getModuleFlagsMetadata(ModuleFlags);
SmallVector<Module::ModuleFlagEntry, 8>::iterator it = ModuleFlags.begin();
for (;it != ModuleFlags.end(); ++it) {
if (Key == it->Key->getString())
return it->Val;
}
return NULL;
}
#else
#define getModuleFlag(m,str) m->getModuleFlag(str)
#endif
static void jl_setup_module(Module *m)
{
// Some linkers (*cough* OS X) don't understand DWARF v4, so we use v2 in
// imaging mode. The structure of v4 is slightly nicer for debugging JIT
// code.
if (!getModuleFlag(m,"Dwarf Version")) {
int dwarf_version = 4;
#ifdef _OS_DARWIN_
if (imaging_mode)
dwarf_version = 2;
#endif