forked from JuliaLang/julia
-
Notifications
You must be signed in to change notification settings - Fork 0
/
cgutils.cpp
1538 lines (1418 loc) · 53.2 KB
/
cgutils.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// utility procedures used in code generation
// Fixing up references to other modules for MCJIT
static GlobalVariable *prepare_global(GlobalVariable *G)
{
#ifdef USE_MCJIT
if(G->getParent() != jl_Module)
{
GlobalVariable *gv = jl_Module->getGlobalVariable(G->getName());
if(!gv) {
gv =
new GlobalVariable(*jl_Module, G->getType()->getElementType(),
true, GlobalVariable::ExternalLinkage,
NULL, G->getName());
}
return gv;
}
#endif
return G;
}
static llvm::Value *prepare_call(llvm::Value* Callee)
{
#ifdef USE_MCJIT
llvm::Function *F = dyn_cast<Function>(Callee);
if (!F)
return Callee;
if (F->getParent() != jl_Module) {
Function *ModuleF = jl_Module->getFunction(F->getName());
if(ModuleF) {
return ModuleF;
}
else {
return Function::Create(F->getFunctionType(),
Function::ExternalLinkage,
F->getName(),
jl_Module);
}
}
#endif
return Callee;
}
static inline void add_named_global(GlobalValue *gv, void *addr)
{
#ifdef USE_MCJIT
sys::DynamicLibrary::AddSymbol(gv->getName(),addr);
#else
jl_ExecutionEngine->addGlobalMapping(gv,addr);
#endif
}
// --- string constants ---
static std::map<const std::string, GlobalVariable*> stringConstants;
static GlobalVariable *stringConst(const std::string &txt)
{
GlobalVariable *gv = stringConstants[txt];
static int strno = 0;
if (gv == NULL) {
std::stringstream ssno;
std::string vname;
ssno << strno;
vname += "_j_str";
vname += ssno.str();
gv = new GlobalVariable(*jl_Module,
ArrayType::get(T_int8, txt.length()+1),
true,
imaging_mode ? GlobalVariable::PrivateLinkage : GlobalVariable::ExternalLinkage,
#ifndef LLVM_VERSION_MAJOR
ConstantArray::get(getGlobalContext(),
txt.c_str()),
#elif LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 1
ConstantDataArray::get(getGlobalContext(),
ArrayRef<unsigned char>(
(const unsigned char*)txt.c_str(),
txt.length()+1)),
#endif
vname);
stringConstants[txt] = gv;
strno++;
}
return gv;
}
// --- Shadow module handling ---
typedef struct {Value* gv; int32_t index;} jl_value_llvm; // uses 1-based indexing
static std::map<void*, jl_value_llvm> jl_value_to_llvm;
static std::map<Value *, void*> llvm_to_jl_value;
#ifdef USE_MCJIT
class FunctionMover;
static Function *clone_llvm_function(llvm::Function *toClone,FunctionMover *mover);
class FunctionMover : public ValueMaterializer
{
public:
FunctionMover(llvm::Module *dest,llvm::Module *src) :
ValueMaterializer(), VMap(), destModule(dest), srcModule(src)
{
}
ValueToValueMapTy VMap;
llvm::Module *destModule;
llvm::Module *srcModule;
virtual Value *materializeValueFor (Value *V)
{
Function *F = dyn_cast<Function>(V);
if(F) {
if(F->isIntrinsic()) {
return destModule->getOrInsertFunction(F->getName(),F->getFunctionType());
}
if(F->isDeclaration() || F->getParent() != destModule) {
Function *shadow = srcModule->getFunction(F->getName());
if (shadow != NULL && !shadow->isDeclaration()) {
// Not truly external
// Check whether we already emitted it once
uint64_t addr = jl_mcjmm->getSymbolAddress(F->getName());
if (addr == 0) {
return clone_llvm_function(shadow,this);
}
else {
return destModule->getOrInsertFunction(F->getName(),F->getFunctionType());
}
} else if (!F->isDeclaration())
{
return clone_llvm_function(F,this);
}
}
// Still a declaration and still in a different module
if(F->isDeclaration() && F->getParent() != destModule)
{
// Create forward declaration in current module
return destModule->getOrInsertFunction(F->getName(),F->getFunctionType());
}
} else if (isa<GlobalVariable>(V))
{
GlobalVariable *GV = cast<GlobalVariable>(V);
assert(GV != NULL);
GlobalVariable *newGV = new GlobalVariable(*destModule,
GV->getType()->getElementType(),
GV->isConstant(),
GlobalVariable::ExternalLinkage,
NULL,
GV->getName());
newGV->copyAttributesFrom(GV);
if (GV->isDeclaration())
return newGV;
uint64_t addr = jl_mcjmm->getSymbolAddress(GV->getName());
if(addr != 0) {
newGV->setExternallyInitialized(true);
return newGV;
}
std::map<Value*, void *>::iterator it;
it = llvm_to_jl_value.find(GV);
if (it != llvm_to_jl_value.end()) {
newGV->setInitializer(Constant::getIntegerValue(GV->getType()->getElementType(),APInt(sizeof(void*)*8,(ptrint_t)it->second)));
newGV->setConstant(true);
}
else if (GV->hasInitializer()) {
Value *C = MapValue(GV->getInitializer(),VMap,RF_None,NULL,this);
newGV->setInitializer(cast<Constant>(C));
}
return newGV;
}
return NULL;
};
};
static Function *clone_llvm_function(llvm::Function *toClone,FunctionMover *mover)
{
Function *NewF = Function::Create(toClone->getFunctionType(),
Function::ExternalLinkage,
toClone->getName(),
mover->destModule);
ClonedCodeInfo info;
Function::arg_iterator DestI = NewF->arg_begin();
for (Function::const_arg_iterator I = toClone->arg_begin(), E = toClone->arg_end(); I != E; ++I) {
DestI->setName(I->getName()); // Copy the name over...
mover->VMap[I] = DestI++; // Add mapping to VMap
}
// Necessary in case the function is self referential
mover->VMap[toClone] = NewF;
SmallVector<ReturnInst*, 8> Returns;
llvm::CloneFunctionInto(NewF,toClone,mover->VMap,true,Returns,"",NULL,NULL,mover);
return NewF;
}
#endif
// --- emitting pointers directly into code ---
static Value *literal_static_pointer_val(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(T_int64, (uint64_t)p), t);
#else
return ConstantExpr::getIntToPtr(ConstantInt::get(T_int32, (uint32_t)p), t);
#endif
}
static std::vector<Constant*> jl_sysimg_gvars;
extern "C" int32_t jl_get_llvm_gv(jl_value_t *p)
{
// map a jl_value_t memory location to a GlobalVariable
std::map<void*, jl_value_llvm>::iterator it;
it = jl_value_to_llvm.find(p);
if (it == jl_value_to_llvm.end())
return 0;
return it->second.index;
}
static void jl_gen_llvm_gv_array()
{
// emit the variable table into the code image (can only call this once)
// used just before dumping bitcode
ArrayType *atype = ArrayType::get(T_psize,jl_sysimg_gvars.size());
new GlobalVariable(
*jl_Module,
atype,
true,
GlobalVariable::ExternalLinkage,
ConstantArray::get(atype, ArrayRef<Constant*>(jl_sysimg_gvars)),
"jl_sysimg_gvars");
}
static int32_t jl_assign_functionID(Function *functionObject)
{
// give the function an index in the constant lookup table
if (!imaging_mode)
return 0;
jl_sysimg_gvars.push_back(ConstantExpr::getBitCast(functionObject,T_psize));
return jl_sysimg_gvars.size();
}
static Value *julia_gv(const char *cname, void *addr)
{
// emit a GlobalVariable for a jl_value_t named "cname"
std::map<void*, jl_value_llvm>::iterator it;
// first see if there already is a GlobalVariable for this address
it = jl_value_to_llvm.find(addr);
if (it != jl_value_to_llvm.end())
return builder.CreateLoad(it->second.gv);
// no existing GlobalVariable, create one and store it
GlobalValue *gv = new GlobalVariable(*jl_Module, jl_pvalue_llvmt,
false, imaging_mode ? GlobalVariable::InternalLinkage : GlobalVariable::ExternalLinkage,
ConstantPointerNull::get((PointerType*)jl_pvalue_llvmt), cname);
// make the pointer valid for this session
#ifdef USE_MCJIT
llvm_to_jl_value[gv] = addr;
#else
void **p = (void**)jl_ExecutionEngine->getPointerToGlobal(gv);
*p = addr;
#endif
// make the pointer valid for future sessions
jl_sysimg_gvars.push_back(ConstantExpr::getBitCast(gv, T_psize));
jl_value_llvm gv_struct;
gv_struct.gv = gv;
gv_struct.index = jl_sysimg_gvars.size();
jl_value_to_llvm[addr] = gv_struct;
return builder.CreateLoad(gv);
}
static Value *julia_gv(const char *prefix, jl_sym_t *name, jl_module_t *mod, void *addr)
{
// emit a GlobalVariable for a jl_value_t, using the prefix, name, and module to
// to create a readable name of the form prefixModA.ModB.name
size_t len = strlen(name->name)+strlen(prefix)+1;
jl_module_t *parent = mod, *prev = NULL;
while (parent != NULL && parent != prev) {
len += strlen(parent->name->name)+1;
prev = parent;
parent = parent->parent;
}
char *fullname = (char*)alloca(len);
strcpy(fullname, prefix);
len -= strlen(name->name)+1;
strcpy(fullname+len,name->name);
parent = mod;
prev = NULL;
while (parent != NULL && parent != prev) {
size_t part = strlen(parent->name->name)+1;
strcpy(fullname+len-part,parent->name->name);
fullname[len-1] = '.';
len -= part;
prev = parent;
parent = parent->parent;
}
return julia_gv(fullname, addr);
}
static Value *literal_pointer_val(jl_value_t *p)
{
// emit a pointer to any jl_value_t which will be valid across reloading code
// also, try to give it a nice name for gdb, for easy identification
if (p == NULL)
return ConstantPointerNull::get((PointerType*)jl_pvalue_llvmt);
if (!imaging_mode)
return literal_static_pointer_val(p, jl_pvalue_llvmt);
if (jl_is_datatype(p)) {
jl_datatype_t* addr = (jl_datatype_t*)p;
// DataTypes are prefixed with a +
return julia_gv("+", addr->name->name, addr->name->module, p);
}
if (jl_is_func(p)) {
jl_lambda_info_t* linfo = ((jl_function_t*)p)->linfo;
// Functions are prefixed with a -
if (linfo != NULL)
return julia_gv("-", linfo->name, linfo->module, p);
// Anonymous lambdas are prefixed with jl_method#
return julia_gv("jl_method#", p);
}
if (jl_is_lambda_info(p)) {
jl_lambda_info_t* linfo = (jl_lambda_info_t*)p;
// Type-inferred functions are prefixed with a -
return julia_gv("-", linfo->name, linfo->module, p);
}
if (jl_is_symbol(p)) {
jl_sym_t* addr = (jl_sym_t*)p;
// Symbols are prefixed with jl_sym#
return julia_gv("jl_sym#", addr, NULL, p);
}
// something else gets just a generic name
return julia_gv("jl_global#", p);
}
static Value *literal_pointer_val(jl_binding_t *p)
{
// emit a pointer to any jl_value_t which will be valid across reloading code
if (p == NULL)
return ConstantPointerNull::get((PointerType*)jl_pvalue_llvmt);
if (!imaging_mode)
return literal_static_pointer_val(p, jl_pvalue_llvmt);
// bindings are prefixed with jl_bnd#
return julia_gv("jl_bnd#", p->name, p->owner, p);
}
static Value *julia_binding_gv(jl_binding_t *b)
{
// emit a literal_pointer_val to the value field of a jl_binding_t
// binding->value are prefixed with *
Value *bv = imaging_mode ?
builder.CreateBitCast(julia_gv("*", b->name, b->owner, b), jl_ppvalue_llvmt) :
literal_static_pointer_val(b,jl_ppvalue_llvmt);
return builder.CreateGEP(bv,ConstantInt::get(T_size,
offsetof(jl_binding_t,value)/sizeof(size_t)));
}
// --- mapping between julia and llvm types ---
static Type *julia_struct_to_llvm(jl_value_t *jt);
static bool jltupleisbits(jl_value_t *jt, bool allow_unsized = true);
static Type *julia_type_to_llvm(jl_value_t *jt)
{
if (jt == (jl_value_t*)jl_bool_type) return T_int1;
if (jt == (jl_value_t*)jl_bottom_type) return T_void;
if (jl_is_tuple(jt)) {
// Represent tuples as anonymous structs
size_t ntypes = jl_tuple_len(jt);
if (ntypes == 0)
return T_void;
bool purebits = true;
bool isvector = true;
Type *type = NULL;
for (size_t i = 0; i < ntypes; ++i) {
jl_value_t *elt = jl_tupleref(jt,i);
purebits &= jltupleisbits(elt);
Type *newtype = julia_struct_to_llvm(elt);
if (type != NULL && type != newtype)
isvector = false;
type = newtype;
if (!purebits && !isvector)
break;
}
if (purebits) {
// Can't be bool due to
// http:https://llvm.org/bugs/show_bug.cgi?id=12618
if (isvector && type != T_int1 && type != T_void) {
Type *ret = NULL;
if (type->isSingleValueType() && !type->isVectorTy())
ret = VectorType::get(type,ntypes);
else
ret = ArrayType::get(type,ntypes);
return ret;
}
else {
Type **types = (Type**)alloca(ntypes*sizeof(Type*));
size_t j = 0;
for (size_t i = 0; i < ntypes; ++i) {
Type *ty = julia_struct_to_llvm(jl_tupleref(jt,i));
if (ty == T_void || ty->isEmptyTy())
continue;
types[j++] = ty;
}
return StructType::get(jl_LLVMContext,ArrayRef<Type*>(&types[0],j));
}
}
}
if (!jl_is_leaf_type(jt))
return jl_pvalue_llvmt;
if (jl_is_cpointer_type(jt)) {
Type *lt = julia_type_to_llvm(jl_tparam0(jt));
if (lt == NULL)
return NULL;
if (lt == T_void)
lt = T_int8;
return PointerType::get(lt, 0);
}
if (jl_is_bitstype(jt)) {
int nb = jl_datatype_size(jt);
if (jl_is_floattype(jt)) {
#ifndef DISABLE_FLOAT16
if (nb == 2)
return Type::getHalfTy(jl_LLVMContext);
else
#endif
if (nb == 4)
return Type::getFloatTy(jl_LLVMContext);
else if (nb == 8)
return Type::getDoubleTy(jl_LLVMContext);
else if (nb == 16)
return Type::getFP128Ty(jl_LLVMContext);
}
return Type::getIntNTy(jl_LLVMContext, nb*8);
}
if (jl_isbits(jt)) {
if (((jl_datatype_t*)jt)->size == 0) {
// TODO: come up with a representation for a 0-size value,
// and make this 0 size everywhere. as an argument, simply
// skip passing it.
return jl_pvalue_llvmt;
}
return julia_struct_to_llvm(jt);
}
return jl_pvalue_llvmt;
}
static Type *julia_struct_to_llvm(jl_value_t *jt)
{
if (jl_is_structtype(jt) && !jl_is_array_type(jt)) {
if (!jl_is_leaf_type(jt))
return NULL;
jl_datatype_t *jst = (jl_datatype_t*)jt;
if (jst->struct_decl == NULL) {
size_t ntypes = jl_tuple_len(jst->types);
if (ntypes == 0)
return T_void;
StructType *structdecl = StructType::create(getGlobalContext(), jst->name->name->name);
jst->struct_decl = structdecl;
std::vector<Type *> latypes(0);
size_t i;
for(i = 0; i < ntypes; i++) {
jl_value_t *ty = jl_tupleref(jst->types, i);
Type *lty;
if (jst->fields[i].isptr)
lty = jl_pvalue_llvmt;
else
lty = ty==(jl_value_t*)jl_bool_type ? T_int8 : julia_type_to_llvm(ty);
latypes.push_back(lty);
}
structdecl->setBody(latypes);
}
return (Type*)jst->struct_decl;
}
return julia_type_to_llvm(jt);
}
// NOTE: llvm cannot express all julia types (for example unsigned),
// so this is an approximation. it's only correct if the associated LLVM
// value is not tagged with our value name hack.
// boxed(v) below gets the correct type.
static jl_value_t *llvm_type_to_julia(Type *t, bool throw_error)
{
if (t == T_int1) return (jl_value_t*)jl_bool_type;
if (t == T_int8) return (jl_value_t*)jl_int8_type;
if (t == T_int16) return (jl_value_t*)jl_int16_type;
if (t == T_int32) return (jl_value_t*)jl_int32_type;
if (t == T_int64) return (jl_value_t*)jl_int64_type;
if (t == T_float32) return (jl_value_t*)jl_float32_type;
if (t == T_float64) return (jl_value_t*)jl_float64_type;
if (t == T_void) return (jl_value_t*)jl_bottom_type;
if (t->isEmptyTy()) return (jl_value_t*)jl_nothing->type;
if (t == jl_pvalue_llvmt)
return (jl_value_t*)jl_any_type;
if (t->isPointerTy()) {
jl_value_t *elty = llvm_type_to_julia(t->getContainedType(0),
throw_error);
if (elty != NULL) {
return (jl_value_t*)jl_apply_type((jl_value_t*)jl_pointer_type,
jl_tuple1(elty));
}
}
if (throw_error) {
jl_error("cannot convert type to a julia type");
}
return NULL;
}
static bool is_structtype_all_pointers(jl_datatype_t *dt)
{
jl_tuple_t *t = dt->types;
size_t i, l = jl_tuple_len(t);
for(i=0; i < l; i++) {
if (!dt->fields[i].isptr)
return false;
}
return true;
}
static bool is_tupletype_homogeneous(jl_tuple_t *t)
{
size_t i, l = jl_tuple_len(t);
if (l > 0) {
jl_value_t *t0 = jl_tupleref(t, 0);
if (!jl_is_leaf_type(t0))
return false;
for(i=1; i < l; i++) {
if (!jl_types_equal(t0, jl_tupleref(t,i)))
return false;
}
}
return true;
}
// --- scheme for tagging llvm values with julia types using metadata ---
static std::map<int, jl_value_t*> typeIdToType;
static jl_array_t *typeToTypeId;
static int cur_type_id = 1;
static int jl_type_to_typeid(jl_value_t *t)
{
jl_value_t *id = jl_eqtable_get(typeToTypeId, t, NULL);
if (id == NULL) {
int mine = cur_type_id++;
if (mine > 65025)
jl_error("internal compiler error: too many bits types");
JL_GC_PUSH1(&id);
id = jl_box_long(mine);
jl_eqtable_put(typeToTypeId, t, id);
typeIdToType[mine] = t;
JL_GC_POP();
return mine;
}
return jl_unbox_long(id);
}
static jl_value_t *jl_typeid_to_type(int i)
{
std::map<int, jl_value_t*>::iterator it = typeIdToType.find(i);
if (it == typeIdToType.end()) {
jl_error("internal compiler error: invalid type id");
}
return (*it).second;
}
static bool has_julia_type(Value *v)
{
Instruction *inst = (dyn_cast<Instruction>(v));
return (inst != NULL) &&
(inst->getMetadata("julia_type")!=NULL);
}
static jl_value_t *julia_type_of_without_metadata(Value *v, bool err=true)
{
if (dyn_cast<AllocaInst>(v) != NULL ||
dyn_cast<GetElementPtrInst>(v) != NULL) {
// an alloca always has llvm type pointer
return llvm_type_to_julia(v->getType()->getContainedType(0), err);
}
return llvm_type_to_julia(v->getType(), err);
}
static jl_value_t *julia_type_of(Value *v)
{
MDNode *mdn;
if (dyn_cast<Instruction>(v) == NULL ||
(mdn = ((Instruction*)v)->getMetadata("julia_type")) == NULL) {
return julia_type_of_without_metadata(v, true);
}
MDString *md = (MDString*)mdn->getOperand(0);
const unsigned char *vts = (const unsigned char*)md->getString().data();
int id = (vts[0]-1) + (vts[1]-1)*255;
return jl_typeid_to_type(id);
}
static Value *NoOpInst(Value *v)
{
v = SelectInst::Create(ConstantInt::get(T_int1,1), v, v);
builder.Insert((Instruction*)v);
return v;
}
static Value *mark_julia_type(Value *v, jl_value_t *jt)
{
if (jt == (jl_value_t*)jl_any_type || v->getType()==jl_pvalue_llvmt)
return v;
if (has_julia_type(v)) {
if (julia_type_of(v) == jt)
return v;
}
else if (julia_type_of_without_metadata(v,false) == jt) {
return v;
}
if (dyn_cast<Instruction>(v) == NULL)
v = NoOpInst(v);
assert(dyn_cast<Instruction>(v));
char name[3];
int id = jl_type_to_typeid(jt);
// store id as base-255 to avoid NUL
name[0] = (id%255)+1;
name[1] = (id/255)+1;
name[2] = '\0';
MDString *md = MDString::get(jl_LLVMContext, name);
MDNode *mdn = MDNode::get(jl_LLVMContext, ArrayRef<Value*>(md));
((Instruction*)v)->setMetadata("julia_type", mdn);
return v;
}
// --- generating various error checks ---
static jl_value_t *llvm_type_to_julia(Type *t, bool err=true);
static Value *emit_typeof(Value *p)
{
// given p, a jl_value_t*, compute its type tag
if (p->getType() == jl_pvalue_llvmt) {
Value *tt = builder.CreateBitCast(p, jl_ppvalue_llvmt);
tt = builder.
CreateLoad(builder.CreateGEP(tt,ConstantInt::get(T_size,0)),
false);
#ifdef OVERLAP_TUPLE_LEN
tt = builder.
CreateIntToPtr(builder.
CreateAnd(builder.CreatePtrToInt(tt, T_int64),
ConstantInt::get(T_int64,0x000ffffffffffffe)),
jl_pvalue_llvmt);
#endif
return tt;
}
return literal_pointer_val(julia_type_of(p));
}
static void just_emit_error(const std::string &txt, jl_codectx_t *ctx)
{
Value *zeros[2] = { ConstantInt::get(T_int32, 0),
ConstantInt::get(T_int32, 0) };
builder.CreateCall(prepare_call(jlerror_func),
builder.CreateGEP(stringConst(txt),
ArrayRef<Value*>(zeros)));
}
static void emit_error(const std::string &txt, jl_codectx_t *ctx)
{
just_emit_error(txt, ctx);
builder.CreateUnreachable();
BasicBlock *cont = BasicBlock::Create(getGlobalContext(),"after_error",ctx->f);
builder.SetInsertPoint(cont);
}
static void error_unless(Value *cond, const std::string &msg, jl_codectx_t *ctx)
{
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(cond, passBB, failBB);
builder.SetInsertPoint(failBB);
just_emit_error(msg, ctx);
builder.CreateUnreachable();
ctx->f->getBasicBlockList().push_back(passBB);
builder.SetInsertPoint(passBB);
}
static void raise_exception_unless(Value *cond, Value *exc, jl_codectx_t *ctx)
{
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(cond, passBB, failBB);
builder.SetInsertPoint(failBB);
builder.CreateCall2(prepare_call(jlthrow_line_func), exc,
ConstantInt::get(T_int32, ctx->lineno));
builder.CreateUnreachable();
ctx->f->getBasicBlockList().push_back(passBB);
builder.SetInsertPoint(passBB);
}
static void raise_exception_unless(Value *cond, GlobalVariable *exc,
jl_codectx_t *ctx)
{
raise_exception_unless(cond, (Value*)builder.CreateLoad(exc, false), ctx);
}
static void raise_exception_if(Value *cond, Value *exc, jl_codectx_t *ctx)
{
raise_exception_unless(builder.CreateXor(cond, ConstantInt::get(T_int1,-1)),
exc, ctx);
}
static void raise_exception_if(Value *cond, GlobalVariable *exc,
jl_codectx_t *ctx)
{
raise_exception_if(cond, (Value*)builder.CreateLoad(exc, false), ctx);
}
static void null_pointer_check(Value *v, jl_codectx_t *ctx)
{
raise_exception_unless(builder.CreateICmpNE(v,Constant::getNullValue(v->getType())),
prepare_global(jlundeferr_var), ctx);
}
static Value *boxed(Value *v, jl_codectx_t *ctx, jl_value_t *jt=NULL);
static void emit_type_error(Value *x, jl_value_t *type, const std::string &msg,
jl_codectx_t *ctx)
{
Value *zeros[2] = { ConstantInt::get(T_int32, 0),
ConstantInt::get(T_int32, 0) };
Value *fname_val = builder.CreateGEP(stringConst(ctx->funcName),
ArrayRef<Value*>(zeros));
Value *msg_val = builder.CreateGEP(stringConst(msg),
ArrayRef<Value*>(zeros));
builder.CreateCall4(prepare_call(jltypeerror_func),
fname_val, msg_val,
literal_pointer_val(type), boxed(x,ctx));
}
static void emit_typecheck(Value *x, jl_value_t *type, const std::string &msg,
jl_codectx_t *ctx)
{
Value *istype =
builder.CreateICmpEQ(emit_typeof(x), literal_pointer_val(type));
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(),"fail",ctx->f);
BasicBlock *passBB = BasicBlock::Create(getGlobalContext(),"pass");
builder.CreateCondBr(istype, passBB, failBB);
builder.SetInsertPoint(failBB);
emit_type_error(x, type, msg, ctx);
builder.CreateBr(passBB);
ctx->f->getBasicBlockList().push_back(passBB);
builder.SetInsertPoint(passBB);
}
#define CHECK_BOUNDS 1
static Value *emit_bounds_check(Value *i, Value *len, jl_codectx_t *ctx)
{
Value *im1 = builder.CreateSub(i, ConstantInt::get(T_size, 1));
#if CHECK_BOUNDS==1
if (ctx->boundsCheck.empty() || ctx->boundsCheck.back()==true) {
Value *ok = builder.CreateICmpULT(im1, len);
raise_exception_unless(ok, prepare_global(jlboundserr_var), ctx);
}
#endif
return im1;
}
static void emit_func_check(Value *x, jl_codectx_t *ctx)
{
Value *xty = emit_typeof(x);
Value *isfunc =
builder.
CreateOr(builder.
CreateICmpEQ(xty,
literal_pointer_val((jl_value_t*)jl_function_type)),
builder.
CreateICmpEQ(xty,
literal_pointer_val((jl_value_t*)jl_datatype_type)));
BasicBlock *elseBB1 = BasicBlock::Create(getGlobalContext(),"notf", ctx->f);
BasicBlock *mergeBB1 = BasicBlock::Create(getGlobalContext(),"isf");
builder.CreateCondBr(isfunc, mergeBB1, elseBB1);
builder.SetInsertPoint(elseBB1);
emit_type_error(x, (jl_value_t*)jl_function_type, "apply", ctx);
builder.CreateBr(mergeBB1);
ctx->f->getBasicBlockList().push_back(mergeBB1);
builder.SetInsertPoint(mergeBB1);
}
// --- loading and storing ---
static Value *emit_nthptr_addr(Value *v, size_t n)
{
return builder.CreateGEP(builder.CreateBitCast(v, jl_ppvalue_llvmt),
ConstantInt::get(T_size, n));
}
static Value *emit_nthptr_addr(Value *v, Value *idx)
{
return builder.CreateGEP(builder.CreateBitCast(v, jl_ppvalue_llvmt), idx);
}
static Value *emit_nthptr(Value *v, size_t n)
{
// p = (jl_value_t**)v; p[n]
Value *vptr = emit_nthptr_addr(v, n);
return builder.CreateLoad(vptr, false);
}
static Value *emit_nthptr(Value *v, Value *idx)
{
// p = (jl_value_t**)v; p[n]
Value *vptr = emit_nthptr_addr(v, idx);
return builder.CreateLoad(vptr, false);
}
static Value *typed_load(Value *ptr, Value *idx_0based, jl_value_t *jltype,
jl_codectx_t *ctx)
{
Type *elty = julia_type_to_llvm(jltype);
assert(elty != NULL);
bool isbool=false;
if (elty==T_int1) { elty = T_int8; isbool=true; }
Value *data = builder.CreateBitCast(ptr, PointerType::get(elty, 0));
Value *elt = builder.CreateLoad(builder.CreateGEP(data, idx_0based), false);
if (elty == jl_pvalue_llvmt) {
null_pointer_check(elt, ctx);
}
if (isbool)
return builder.CreateTrunc(elt, T_int1);
return mark_julia_type(elt, jltype);
}
static Value *emit_unbox(Type *to, Value *x, jl_value_t *jt);
static Value *typed_store(Value *ptr, Value *idx_0based, Value *rhs,
jl_value_t *jltype, jl_codectx_t *ctx)
{
Type *elty = julia_type_to_llvm(jltype);
assert(elty != NULL);
if (elty==T_int1) { elty = T_int8; }
if (jl_isbits(jltype) && ((jl_datatype_t*)jltype)->size > 0)
rhs = emit_unbox(elty, rhs, jltype);
else
rhs = boxed(rhs,ctx);
Value *data = builder.CreateBitCast(ptr, PointerType::get(elty, 0));
return builder.CreateStore(rhs, builder.CreateGEP(data, idx_0based));
}
// --- convert boolean value to julia ---
static Value *julia_bool(Value *cond)
{
return builder.CreateSelect(cond,
literal_pointer_val(jl_true),
literal_pointer_val(jl_false));
}
// --- get the inferred type of an AST node ---
static jl_value_t *static_eval(jl_value_t *ex, jl_codectx_t *ctx, bool sparams=true,
bool allow_alloc=true);
static inline jl_module_t *topmod(jl_codectx_t *ctx)
{
return jl_base_relative_to(ctx->module);
}
static jl_value_t *expr_type(jl_value_t *e, jl_codectx_t *ctx)
{
if (jl_is_expr(e))
return ((jl_expr_t*)e)->etype;
if (jl_is_symbolnode(e))
return jl_symbolnode_type(e);
if (jl_is_quotenode(e))
return (jl_value_t*)jl_typeof(jl_fieldref(e,0));
if (jl_is_lambda_info(e))
return (jl_value_t*)jl_function_type;
if (jl_is_getfieldnode(e)) {
jl_value_t *v = static_eval(e, ctx);
if (v == NULL)
return jl_getfieldnode_type(e);
e = v;
goto type_of_constant;
}
if (jl_is_topnode(e)) {
e = jl_fieldref(e,0);
jl_binding_t *b = jl_get_binding(topmod(ctx), (jl_sym_t*)e);
if (!b || !b->value)
return jl_top_type;
if (b->constp) {
e = b->value;
goto type_of_constant;
}
else {
return (jl_value_t*)jl_any_type;
}
}
if (jl_is_symbol(e)) {
if (jl_is_symbol(e)) {
if (is_global((jl_sym_t*)e, ctx)) {
// look for static parameter
for(size_t i=0; i < jl_tuple_len(ctx->sp); i+=2) {
assert(jl_is_symbol(jl_tupleref(ctx->sp, i)));
if (e == jl_tupleref(ctx->sp, i)) {
e = jl_tupleref(ctx->sp, i+1);
goto type_of_constant;
}
}
}
else {
return (jl_value_t*)jl_any_type;
}
}
jl_binding_t *b = jl_get_binding(ctx->module, (jl_sym_t*)e);
if (!b || !b->value)
return jl_top_type;
if (b->constp)
e = b->value;
else
return (jl_value_t*)jl_any_type;
}
type_of_constant:
if (jl_is_datatype(e) || jl_is_uniontype(e) || jl_is_typector(e))
return (jl_value_t*)jl_wrap_Type(e);
return (jl_value_t*)jl_typeof(e);
}
// --- accessing the representations of built-in data types ---
static Value *emit_tuplelen(Value *t,jl_value_t *jt)
{
if (t == NULL)
return ConstantInt::get(T_size,0);
Type *ty = t->getType();
if (ty == jl_pvalue_llvmt) { //boxed
#ifdef OVERLAP_TUPLE_LEN
Value *lenbits = emit_nthptr(t, (size_t)0);
return builder.CreateLShr(builder.CreatePtrToInt(lenbits, T_int64),
ConstantInt::get(T_int32, 52));
#else
Value *lenbits = emit_nthptr(t, 1);
return builder.CreatePtrToInt(lenbits, T_size);
#endif
}
else { //unboxed
return ConstantInt::get(T_size,jl_tuple_len(jt));
}
}
static Value *emit_tupleset(Value *tuple, Value *ival, Value *x, jl_value_t *jt, jl_codectx_t *ctx)
{
if (tuple == NULL) {
// A typecheck must have caught this one
//builder.CreateUnreachable();
return NULL;
}
Type *ty = tuple->getType();
if (ty == jl_pvalue_llvmt) { //boxed
#ifdef OVERLAP_TUPLE_LEN
Value *slot = builder.CreateGEP(builder.CreateBitCast(tuple, jl_ppvalue_llvmt),
ival);
#else
Value *slot = builder.CreateGEP(builder.CreateBitCast(tuple, jl_ppvalue_llvmt),
builder.CreateAdd(ConstantInt::get(T_size,1),ival));
#endif
builder.CreateStore(x,slot);
return tuple;
}
ConstantInt *idx = dyn_cast<ConstantInt>(ival);
assert(idx != NULL && "tuplesets must use constant indices");
unsigned ci = (unsigned)idx->getZExtValue()-1;
if (ty->isVectorTy()) {
return mark_julia_type(builder.CreateInsertElement(tuple,x,ConstantInt::get(T_int32,ci)), jt);
}
size_t i,j,n = jl_tuple_len(jt);
for (i = 0, j = 0; i<n; i++) {
Type *ty = julia_struct_to_llvm(jl_tupleref(jt,i));
if (ty == T_void || ty->isEmptyTy()) {
if (ci == i) {
return tuple;
}
}
else {
if (ci == i) {
return mark_julia_type(builder.CreateInsertValue(tuple,x,ArrayRef<unsigned>(j)), jt);
}
j++;
}
}
assert(0 && "emit_tupleset must be called with an in-bounds index");
return NULL;
}
static Value *allocate_box_dynamic(Value *jlty, Value *nb, Value *v);
static void jl_add_linfo_root(jl_lambda_info_t *li, jl_value_t *val);
// Julia semantics