-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
Copy pathLLVM_Runtime_Linker.cpp
1412 lines (1290 loc) · 62.4 KB
/
LLVM_Runtime_Linker.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
#include "LLVM_Runtime_Linker.h"
#include "Error.h"
#include "LLVM_Headers.h"
#include "Target.h"
namespace Halide {
using std::string;
using std::vector;
namespace {
std::unique_ptr<llvm::Module> parse_bitcode_file(llvm::StringRef buf, llvm::LLVMContext *context, const char *id) {
llvm::MemoryBufferRef bitcode_buffer = llvm::MemoryBufferRef(buf, id);
auto ret_val = llvm::expectedToErrorOr(
llvm::parseBitcodeFile(bitcode_buffer, *context));
if (!ret_val) {
internal_error << "Could not parse built-in bitcode file " << id
<< " llvm error is " << ret_val.getError() << "\n";
}
std::unique_ptr<llvm::Module> result(std::move(*ret_val));
result->setModuleIdentifier(id);
return result;
}
#define DECLARE_INITMOD(mod) \
extern "C" unsigned char halide_internal_initmod_##mod[]; \
extern "C" int halide_internal_initmod_##mod##_length; \
std::unique_ptr<llvm::Module> get_initmod_##mod(llvm::LLVMContext *context) { \
llvm::StringRef sb = llvm::StringRef((const char *)halide_internal_initmod_##mod, \
halide_internal_initmod_##mod##_length); \
return parse_bitcode_file(sb, context, #mod); \
}
#define DECLARE_NO_INITMOD(mod) \
[[maybe_unused]] std::unique_ptr<llvm::Module> get_initmod_##mod(llvm::LLVMContext *, bool = false, bool = false) { \
user_error << "Halide was compiled without support for this target\n"; \
return std::unique_ptr<llvm::Module>(); \
} \
[[maybe_unused]] std::unique_ptr<llvm::Module> get_initmod_##mod##_ll(llvm::LLVMContext *) { \
user_error << "Halide was compiled without support for this target\n"; \
return std::unique_ptr<llvm::Module>(); \
}
#define DECLARE_CPP_INITMOD_LOOKUP_BITS(mod, bits) \
do { \
if (debug) { \
return get_initmod_##mod##_##bits##_debug(context); \
} else { \
return get_initmod_##mod##_##bits(context); \
} \
} while (0)
#define DECLARE_CPP_INITMOD_LOOKUP(mod) \
std::unique_ptr<llvm::Module> get_initmod_##mod(llvm::LLVMContext *context, bool bits_64, bool debug) { \
if (bits_64) { \
DECLARE_CPP_INITMOD_LOOKUP_BITS(mod, 64); \
} else { \
DECLARE_CPP_INITMOD_LOOKUP_BITS(mod, 32); \
} \
}
#define DECLARE_CPP_INITMOD_LOOKUP_64(mod) \
std::unique_ptr<llvm::Module> get_initmod_##mod(llvm::LLVMContext *context, bool bits_64, bool debug) { \
if (bits_64) { \
DECLARE_CPP_INITMOD_LOOKUP_BITS(mod, 64); \
} else { \
internal_error << "No support for 32-bit initmod: " #mod; \
return nullptr; /* appease warnings */ \
} \
}
#define DECLARE_CPP_INITMOD(mod) \
DECLARE_INITMOD(mod##_32_debug) \
DECLARE_INITMOD(mod##_64_debug) \
DECLARE_INITMOD(mod##_32) \
DECLARE_INITMOD(mod##_64) \
DECLARE_CPP_INITMOD_LOOKUP(mod)
#define DECLARE_CPP_INITMOD_64(mod) \
DECLARE_INITMOD(mod##_64_debug) \
DECLARE_INITMOD(mod##_64) \
DECLARE_CPP_INITMOD_LOOKUP_64(mod)
#define DECLARE_LL_INITMOD(mod) \
DECLARE_INITMOD(mod##_ll)
// Universal CPP Initmods. Please keep sorted alphabetically.
DECLARE_CPP_INITMOD(alignment_128)
DECLARE_CPP_INITMOD(alignment_32)
DECLARE_CPP_INITMOD(alignment_64)
DECLARE_CPP_INITMOD(allocation_cache)
DECLARE_CPP_INITMOD(android_clock)
DECLARE_CPP_INITMOD(android_host_cpu_count)
DECLARE_CPP_INITMOD(android_io)
DECLARE_CPP_INITMOD(cache)
DECLARE_CPP_INITMOD(can_use_target)
DECLARE_CPP_INITMOD(cuda)
DECLARE_CPP_INITMOD(destructors)
DECLARE_CPP_INITMOD(device_interface)
DECLARE_CPP_INITMOD(errors)
DECLARE_CPP_INITMOD(fake_get_symbol)
DECLARE_CPP_INITMOD(fake_thread_pool)
DECLARE_CPP_INITMOD(float16_t)
DECLARE_CPP_INITMOD(fopen)
DECLARE_CPP_INITMOD(fopen_lfs)
DECLARE_CPP_INITMOD(force_include_types)
DECLARE_CPP_INITMOD(fuchsia_clock)
DECLARE_CPP_INITMOD(fuchsia_host_cpu_count)
DECLARE_CPP_INITMOD(fuchsia_yield)
DECLARE_CPP_INITMOD(gpu_device_selection)
DECLARE_CPP_INITMOD(halide_buffer_t)
DECLARE_CPP_INITMOD(hexagon_cache_allocator)
DECLARE_CPP_INITMOD(hexagon_dma)
DECLARE_CPP_INITMOD(hexagon_dma_pool)
DECLARE_CPP_INITMOD(hexagon_host)
DECLARE_CPP_INITMOD(ios_io)
DECLARE_CPP_INITMOD(linux_clock)
DECLARE_CPP_INITMOD(linux_host_cpu_count)
DECLARE_CPP_INITMOD(linux_yield)
DECLARE_CPP_INITMOD(module_aot_ref_count)
DECLARE_CPP_INITMOD(module_jit_ref_count)
DECLARE_CPP_INITMOD(msan)
DECLARE_CPP_INITMOD(msan_stubs)
DECLARE_CPP_INITMOD(opencl)
DECLARE_CPP_INITMOD(osx_clock)
DECLARE_CPP_INITMOD(osx_get_symbol)
DECLARE_CPP_INITMOD(osx_host_cpu_count)
DECLARE_CPP_INITMOD(osx_yield)
DECLARE_CPP_INITMOD(posix_aligned_alloc)
DECLARE_CPP_INITMOD(posix_allocator)
DECLARE_CPP_INITMOD(posix_clock)
DECLARE_CPP_INITMOD(posix_error_handler)
DECLARE_CPP_INITMOD(posix_get_symbol)
DECLARE_CPP_INITMOD(posix_io)
DECLARE_CPP_INITMOD(posix_print)
DECLARE_CPP_INITMOD(posix_threads)
DECLARE_CPP_INITMOD(posix_threads_tsan)
DECLARE_CPP_INITMOD(posix_timer_profiler)
DECLARE_CPP_INITMOD(prefetch)
DECLARE_CPP_INITMOD(profiler)
DECLARE_CPP_INITMOD(profiler_inlined)
DECLARE_CPP_INITMOD(pseudostack)
DECLARE_CPP_INITMOD(qurt_allocator)
DECLARE_CPP_INITMOD(qurt_hvx)
DECLARE_CPP_INITMOD(qurt_hvx_vtcm)
DECLARE_CPP_INITMOD(qurt_threads)
DECLARE_CPP_INITMOD(qurt_threads_tsan)
DECLARE_CPP_INITMOD(qurt_yield)
DECLARE_CPP_INITMOD(runtime_api)
DECLARE_CPP_INITMOD(timer_profiler)
DECLARE_CPP_INITMOD(to_string)
DECLARE_CPP_INITMOD(trace_helper)
DECLARE_CPP_INITMOD(tracing)
// TODO(https://github.com/halide/Halide/issues/7248)
// DECLARE_CPP_INITMOD(webgpu)
DECLARE_CPP_INITMOD(webgpu_dawn)
DECLARE_CPP_INITMOD(webgpu_emscripten)
DECLARE_CPP_INITMOD(windows_clock)
DECLARE_CPP_INITMOD(windows_cuda)
DECLARE_CPP_INITMOD(windows_get_symbol)
DECLARE_CPP_INITMOD(windows_io)
DECLARE_CPP_INITMOD(windows_opencl)
DECLARE_CPP_INITMOD(windows_profiler)
DECLARE_CPP_INITMOD(windows_threads)
DECLARE_CPP_INITMOD(windows_threads_tsan)
DECLARE_CPP_INITMOD(windows_yield)
DECLARE_CPP_INITMOD(write_debug_image)
// Universal LL Initmods. Please keep sorted alphabetically.
DECLARE_LL_INITMOD(posix_math)
DECLARE_LL_INITMOD(win32_math)
DECLARE_LL_INITMOD(ptx_dev)
// Various conditional initmods follow (both LL and CPP).
#ifdef WITH_METAL
DECLARE_CPP_INITMOD(metal)
#ifdef WITH_AARCH64
DECLARE_CPP_INITMOD(metal_objc_arm)
#else
DECLARE_NO_INITMOD(metal_objc_arm)
#endif
#ifdef WITH_X86
DECLARE_CPP_INITMOD(metal_objc_x86)
#else
DECLARE_NO_INITMOD(metal_objc_x86)
#endif
#else
DECLARE_NO_INITMOD(metal)
DECLARE_NO_INITMOD(metal_objc_arm)
DECLARE_NO_INITMOD(metal_objc_x86)
#endif // WITH_METAL
#ifdef WITH_ARM
DECLARE_LL_INITMOD(arm)
DECLARE_LL_INITMOD(arm_no_neon)
DECLARE_CPP_INITMOD(arm_cpu_features)
DECLARE_CPP_INITMOD(linux_arm_cpu_features)
DECLARE_CPP_INITMOD(osx_arm_cpu_features)
#else
DECLARE_NO_INITMOD(arm)
DECLARE_NO_INITMOD(arm_no_neon)
DECLARE_NO_INITMOD(arm_cpu_features)
DECLARE_NO_INITMOD(linux_arm_cpu_features)
DECLARE_NO_INITMOD(osx_arm_cpu_features)
#endif // WITH_ARM
#ifdef WITH_AARCH64
DECLARE_LL_INITMOD(aarch64)
DECLARE_CPP_INITMOD(aarch64_cpu_features)
DECLARE_CPP_INITMOD(linux_aarch64_cpu_features)
DECLARE_CPP_INITMOD(osx_aarch64_cpu_features)
DECLARE_CPP_INITMOD_64(windows_aarch64_cpu_features_arm)
#else
DECLARE_NO_INITMOD(aarch64)
DECLARE_NO_INITMOD(aarch64_cpu_features)
DECLARE_NO_INITMOD(linux_aarch64_cpu_features)
DECLARE_NO_INITMOD(osx_aarch64_cpu_features)
DECLARE_NO_INITMOD(windows_aarch64_cpu_features_arm)
#endif // WITH_AARCH64
#ifdef WITH_NVPTX
DECLARE_LL_INITMOD(ptx_compute_20)
DECLARE_LL_INITMOD(ptx_compute_30)
DECLARE_LL_INITMOD(ptx_compute_35)
#endif // WITH_NVPTX
#if defined(WITH_D3D12) && defined(WITH_X86)
DECLARE_CPP_INITMOD(windows_d3d12compute_x86)
#else
DECLARE_NO_INITMOD(windows_d3d12compute_x86)
#endif
#ifdef WITH_D3D12
#ifdef WITH_ARM
DECLARE_INITMOD(windows_d3d12compute_arm_32)
DECLARE_INITMOD(windows_d3d12compute_arm_32_debug)
#else
DECLARE_NO_INITMOD(windows_d3d12compute_arm_32)
DECLARE_NO_INITMOD(windows_d3d12compute_arm_32_debug)
#endif
#ifdef WITH_AARCH64
DECLARE_INITMOD(windows_d3d12compute_arm_64)
DECLARE_INITMOD(windows_d3d12compute_arm_64_debug)
#else
DECLARE_NO_INITMOD(windows_d3d12compute_arm_64)
DECLARE_NO_INITMOD(windows_d3d12compute_arm_64_debug)
#endif
DECLARE_CPP_INITMOD_LOOKUP(windows_d3d12compute_arm)
#else
DECLARE_NO_INITMOD(windows_d3d12compute_arm)
#endif // WITH_D3D12
#ifdef WITH_VULKAN
DECLARE_CPP_INITMOD(vulkan)
DECLARE_CPP_INITMOD(windows_vulkan)
#else
DECLARE_NO_INITMOD(vulkan)
DECLARE_NO_INITMOD(windows_vulkan)
#endif // WITH_VULKAN
#ifdef WITH_X86
DECLARE_LL_INITMOD(x86_amx)
DECLARE_LL_INITMOD(x86_avx512)
DECLARE_LL_INITMOD(x86_avx2)
DECLARE_LL_INITMOD(x86_avx)
DECLARE_LL_INITMOD(x86)
DECLARE_LL_INITMOD(x86_sse41)
DECLARE_CPP_INITMOD(x86_cpu_features)
#else
DECLARE_NO_INITMOD(x86_amx)
DECLARE_NO_INITMOD(x86_avx512)
DECLARE_NO_INITMOD(x86_avx2)
DECLARE_NO_INITMOD(x86_avx)
DECLARE_NO_INITMOD(x86)
DECLARE_NO_INITMOD(x86_sse41)
DECLARE_NO_INITMOD(x86_cpu_features)
#endif // WITH_X86
#ifdef WITH_POWERPC
DECLARE_LL_INITMOD(powerpc)
DECLARE_CPP_INITMOD(powerpc_cpu_features)
#else
DECLARE_NO_INITMOD(powerpc)
DECLARE_NO_INITMOD(powerpc_cpu_features)
#endif // WITH_POWERPC
#ifdef WITH_HEXAGON
DECLARE_LL_INITMOD(hvx_128)
DECLARE_CPP_INITMOD(hexagon_cpu_features)
#else
DECLARE_NO_INITMOD(hvx_128)
DECLARE_NO_INITMOD(hexagon_cpu_features)
#endif // WITH_HEXAGON
#ifdef WITH_WEBASSEMBLY
DECLARE_CPP_INITMOD(wasm_cpu_features)
DECLARE_LL_INITMOD(wasm_math)
#else
DECLARE_NO_INITMOD(wasm_cpu_features)
DECLARE_NO_INITMOD(wasm_math)
#endif // WITH_WEBASSEMBLY
#ifdef WITH_RISCV
// DECLARE_LL_INITMOD(riscv)
DECLARE_CPP_INITMOD(riscv_cpu_features)
#else
// DECLARE_NO_INITMOD(riscv)
DECLARE_NO_INITMOD(riscv_cpu_features)
#endif // WITH_RISCV
llvm::DataLayout get_data_layout_for_target(Target target) {
if (target.arch == Target::X86) {
if (target.bits == 32) {
if (target.os == Target::OSX) {
return llvm::DataLayout("e-m:o-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:128-n8:16:32-S128");
} else if (target.os == Target::IOS) {
return llvm::DataLayout("e-m:o-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:128-n8:16:32-S128");
} else if (target.os == Target::Windows) {
// For 32-bit MSVC targets, alignment of f80 values is 16 bytes (see https://reviews.llvm.org/D115942)
if (!target.has_feature(Target::JIT)) {
return llvm::DataLayout("e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32-a:0:32-S32");
} else {
return llvm::DataLayout("e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32-a:0:32-S32");
}
} else {
// Linux/Android
return llvm::DataLayout("e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:32-n8:16:32-S128");
}
} else { // 64-bit
if (target.os == Target::OSX) {
return llvm::DataLayout("e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128");
} else if (target.os == Target::IOS) {
return llvm::DataLayout("e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128");
} else if (target.os == Target::Windows && !target.has_feature(Target::JIT)) {
return llvm::DataLayout("e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128");
} else if (target.os == Target::Windows) {
return llvm::DataLayout("e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128");
} else {
return llvm::DataLayout("e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128");
}
}
} else if (target.arch == Target::ARM) {
if (target.bits == 32) {
if (target.os == Target::IOS) {
return llvm::DataLayout("e-m:o-p:32:32-Fi8-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32");
} else {
return llvm::DataLayout("e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64");
}
} else { // 64-bit
#if LLVM_VERSION >= 190
if (target.os == Target::IOS) {
return llvm::DataLayout("e-m:o-i64:64-i128:128-n32:64-S128-Fn32");
} else if (target.os == Target::OSX) {
#if LLVM_VERSION >= 200
return llvm::DataLayout("e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32");
#else
return llvm::DataLayout("e-m:o-i64:64-i128:128-n32:64-S128-Fn32");
#endif
} else if (target.os == Target::Windows) {
return llvm::DataLayout("e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128-Fn32");
} else {
#if LLVM_VERSION >= 200
return llvm::DataLayout("e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32");
#else
return llvm::DataLayout("e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32");
#endif
}
#else
if (target.os == Target::IOS) {
return llvm::DataLayout("e-m:o-i64:64-i128:128-n32:64-S128");
} else if (target.os == Target::OSX) {
return llvm::DataLayout("e-m:o-i64:64-i128:128-n32:64-S128");
} else if (target.os == Target::Windows) {
return llvm::DataLayout("e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128");
} else {
return llvm::DataLayout("e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128");
}
#endif
}
} else if (target.arch == Target::POWERPC) {
if (target.bits == 32) {
return llvm::DataLayout("E-m:e-p:32:32-Fn32-i64:64-n32");
} else {
return llvm::DataLayout("e-m:e-Fn32-i64:64-n32:64-S128-v256:256:256-v512:512:512");
}
} else if (target.arch == Target::Hexagon) {
return llvm::DataLayout(
"e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8"
"-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048");
} else if (target.arch == Target::WebAssembly) {
if (target.bits == 32) {
return llvm::DataLayout("e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20");
} else {
return llvm::DataLayout("e-m:e-p:64:64-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20");
}
} else if (target.arch == Target::RISCV) {
if (target.bits == 32) {
return llvm::DataLayout("e-m:e-p:32:32-i64:64-n32-S128");
} else {
return llvm::DataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
}
} else {
// Return empty data layout. Must be set later.
return llvm::DataLayout("");
}
}
} // namespace
namespace Internal {
namespace {
std::optional<llvm::VersionTuple> get_os_version_constraint(const llvm::Triple &triple) {
if (!triple.isOSBinFormatMachO()) {
return std::nullopt;
}
if (triple.isMacOSX() && triple.isX86()) {
// At time of writing (January 2025), this is one version prior
// to the oldest version still supported by Apple.
return llvm::VersionTuple(12, 0, 0);
}
if (triple.isiOS()) {
// At time of writing (January 2025), this is one version prior
// to the oldest version still supported by Apple.
return llvm::VersionTuple(17, 0, 0);
}
llvm::VersionTuple t = triple.getMinimumSupportedOSVersion();
return t.empty() ? std::nullopt : std::make_optional(t);
}
} // namespace
llvm::Triple get_triple_for_target(const Target &target) {
llvm::Triple triple;
if (target.arch == Target::X86) {
if (target.bits == 32) {
triple.setArch(llvm::Triple::x86);
} else {
user_assert(target.bits == 64) << "Target must be 32- or 64-bit.\n";
triple.setArch(llvm::Triple::x86_64);
}
if (target.os == Target::Linux) {
triple.setOS(llvm::Triple::Linux);
triple.setEnvironment(llvm::Triple::GNU);
} else if (target.os == Target::OSX) {
triple.setVendor(llvm::Triple::Apple);
triple.setOS(llvm::Triple::MacOSX);
} else if (target.os == Target::Windows) {
triple.setVendor(llvm::Triple::PC);
triple.setOS(llvm::Triple::Win32);
triple.setEnvironment(llvm::Triple::MSVC);
if (target.has_feature(Target::JIT)) {
// Use ELF for jitting
triple.setObjectFormat(llvm::Triple::ELF);
}
} else if (target.os == Target::Android) {
triple.setOS(llvm::Triple::Linux);
triple.setEnvironment(llvm::Triple::Android);
} else if (target.os == Target::IOS) {
// X86 on iOS for the simulator
triple.setVendor(llvm::Triple::Apple);
triple.setOS(llvm::Triple::IOS);
} else if (target.os == Target::Fuchsia) {
triple.setOS(llvm::Triple::Fuchsia);
}
} else if (target.arch == Target::ARM) {
if (target.bits == 32) {
if (target.has_feature(Target::ARMv7s)) {
triple.setArchName("armv7s");
} else {
triple.setArch(llvm::Triple::arm);
}
} else {
user_assert(target.bits == 64) << "Target bits must be 32 or 64\n";
#ifdef WITH_AARCH64
triple.setArch(llvm::Triple::aarch64);
#else
user_error << "AArch64 llvm target not enabled in this build of Halide\n";
#endif
}
if (target.os == Target::Android) {
triple.setOS(llvm::Triple::Linux);
triple.setEnvironment(llvm::Triple::EABI);
} else if (target.os == Target::IOS) {
triple.setOS(llvm::Triple::IOS);
triple.setVendor(llvm::Triple::Apple);
} else if (target.os == Target::Linux) {
triple.setOS(llvm::Triple::Linux);
triple.setEnvironment(llvm::Triple::GNUEABIHF);
} else if (target.os == Target::Windows) {
user_assert(target.bits == 64) << "Windows ARM targets must be 64-bit.\n";
triple.setVendor(llvm::Triple::PC);
triple.setOS(llvm::Triple::Win32);
triple.setEnvironment(llvm::Triple::MSVC);
if (target.has_feature(Target::JIT)) {
// TODO(shoaibkamil): figure out a way to test this.
// Currently blocked by https://github.com/halide/Halide/issues/5040
user_error << "No JIT support for this OS/CPU combination yet.\n";
}
} else if (target.os == Target::Fuchsia) {
triple.setOS(llvm::Triple::Fuchsia);
} else if (target.os == Target::OSX) {
triple.setVendor(llvm::Triple::Apple);
triple.setOS(llvm::Triple::MacOSX);
triple.setArchName("arm64");
} else if (target.os == Target::NoOS) {
// For bare-metal environments
} else {
user_error << "No arm support for this OS\n";
}
} else if (target.arch == Target::POWERPC) {
#ifdef WITH_POWERPC
// Only ppc*-unknown-linux-gnu are supported for the time being.
user_assert(target.os == Target::Linux) << "PowerPC target is Linux-only.\n";
triple.setVendor(llvm::Triple::UnknownVendor);
triple.setOS(llvm::Triple::Linux);
triple.setEnvironment(llvm::Triple::GNU);
if (target.bits == 32) {
triple.setArch(llvm::Triple::ppc);
} else {
// Currently POWERPC64 support is only little-endian.
user_assert(target.bits == 64) << "Target must be 32- or 64-bit.\n";
triple.setArch(llvm::Triple::ppc64le);
}
#else
user_error << "PowerPC llvm target not enabled in this build of Halide\n";
#endif
} else if (target.arch == Target::Hexagon) {
triple.setVendor(llvm::Triple::UnknownVendor);
triple.setArch(llvm::Triple::hexagon);
triple.setObjectFormat(llvm::Triple::ELF);
} else if (target.arch == Target::WebAssembly) {
triple.setVendor(llvm::Triple::UnknownVendor);
if (target.bits == 32) {
triple.setArch(llvm::Triple::wasm32);
} else {
triple.setArch(llvm::Triple::wasm64);
}
triple.setObjectFormat(llvm::Triple::Wasm);
} else if (target.arch == Target::RISCV) {
if (target.bits == 32) {
triple.setArch(llvm::Triple::riscv32);
} else {
user_assert(target.bits == 64) << "Target must be 32- or 64-bit.\n";
triple.setArch(llvm::Triple::riscv64);
}
if (target.os == Target::Linux) {
triple.setOS(llvm::Triple::Linux);
} else if (target.os == Target::Android) {
triple.setOS(llvm::Triple::Linux);
triple.setEnvironment(llvm::Triple::Android);
} else if (target.os == Target::NoOS) {
// for baremetal environment
} else {
user_error << "No RISCV support for this OS\n";
}
} else {
// Return default-constructed triple. Must be set later.
}
// Setting a minimum OS version here enables LLVM to include platform
// metadata in the MachO object file. Without this, Xcode 15's ld
// issues warnings about missing the "platform load command".
if (auto version = get_os_version_constraint(triple)) {
// llvm::Triple determines the version by parsing the OSName.
triple.setOSName((triple.getOSName() + version->getAsString()).str());
}
return triple;
}
} // namespace Internal
namespace {
void convert_weak_to_linkonce(llvm::GlobalValue &gv) {
llvm::GlobalValue::LinkageTypes linkage = gv.getLinkage();
if (linkage == llvm::GlobalValue::WeakAnyLinkage) {
gv.setLinkage(llvm::GlobalValue::LinkOnceAnyLinkage);
} else if (linkage == llvm::GlobalValue::WeakODRLinkage) {
gv.setLinkage(llvm::GlobalValue::LinkOnceODRLinkage);
} else if (linkage == llvm::GlobalValue::ExternalWeakLinkage) {
gv.setLinkage(llvm::GlobalValue::ExternalLinkage);
}
}
// Link all modules together and with the result in modules[0], all
// other input modules are destroyed. Sets the datalayout and target
// triple appropriately for the target.
void link_modules(std::vector<std::unique_ptr<llvm::Module>> &modules, Target t,
bool allow_stripping_all_weak_functions = false) {
llvm::DataLayout data_layout = get_data_layout_for_target(t);
llvm::Triple triple = Internal::get_triple_for_target(t);
// Set the layout and triple on the modules before linking, so
// llvm doesn't complain while combining them.
for (auto &module : modules) {
if (t.os == Target::Windows &&
!Internal::starts_with(module->getName().str(), "windows_")) {
// When compiling for windows, all wchars are
// 16-bit. Generic modules may have it set to 32-bit. Drop
// any module flags on the generic modules and use the
// more correct ones on the windows-specific modules to
// avoid a conflict. This is safe as long as the generic
// modules never actually use a wchar.
if (auto *module_flags = module->getModuleFlagsMetadata()) {
module->eraseNamedMetadata(module_flags);
}
}
module->setDataLayout(data_layout);
#if LLVM_VERSION >= 210
module->setTargetTriple(triple);
#else
module->setTargetTriple(triple.str());
#endif
}
// Link them all together
for (size_t i = 1; i < modules.size(); i++) {
bool failed = llvm::Linker::linkModules(*modules[0],
std::move(modules[i]));
if (failed) {
internal_error << "Failure linking initial modules\n";
}
}
// Now re-mark most weak symbols as linkonce. They are only weak to
// prevent llvm from stripping them during initial module
// assembly. This means they can be stripped later.
// The symbols that we might want to call as a user even if not
// used in the Halide-generated code must remain weak. This is
// handled automatically by assuming any symbol starting with
// "halide_" that is weak will be retained.
// COMDAT is not supported in MachO object files, hence it does
// not work on Mac OS or iOS. These sometimes show up in the
// runtime since we compile for an abstract target that is based
// on ELF. This code removes all Comdat items and leaves the
// symbols they were attached to as regular definitions, which
// only works if there is a single instance, which is generally
// the case for the runtime. Presumably if this isn't true,
// linking the module will fail.
//
// Comdats are left in for other platforms as they are required
// for certain things on Windows and they are useful in general in
// ELF based formats.
if (t.os == Target::IOS || t.os == Target::OSX) {
for (auto &global_obj : modules[0]->global_objects()) {
global_obj.setComdat(nullptr);
}
modules[0]->getComdatSymbolTable().clear();
}
// Enumerate the global variables.
for (auto &gv : modules[0]->globals()) {
// No variables are part of the public interface (even the ones labelled halide_)
convert_weak_to_linkonce(gv);
}
// Enumerate the functions.
for (auto &f : *modules[0]) {
const std::string f_name = Internal::get_llvm_function_name(f);
assert(f_name != "__stack_chk_guard" && f_name != "__stack_chk_fail");
bool is_halide_extern_c_sym = Internal::starts_with(f_name, "halide_");
internal_assert(!is_halide_extern_c_sym || f.isWeakForLinker() || f.isDeclaration())
<< " for function " << f_name << "\n";
// We never want *any* Function marked as external-weak here;
// convert all of those to plain external.
if (f.getLinkage() == llvm::GlobalValue::ExternalWeakLinkage) {
f.setLinkage(llvm::GlobalValue::ExternalLinkage);
} else {
const bool can_strip = !is_halide_extern_c_sym;
if (can_strip || allow_stripping_all_weak_functions) {
convert_weak_to_linkonce(f);
}
}
// Windows requires every symbol that's going to get merged
// has a comdat that specifies how. The linkage type alone
// isn't enough.
if (t.os == Target::Windows && f.isWeakForLinker()) {
llvm::Comdat *comdat = modules[0]->getOrInsertComdat(f_name);
comdat->setSelectionKind(llvm::Comdat::Any);
f.setComdat(comdat);
}
}
// Now remove the force-usage global that prevented clang from
// dropping functions from the initial module.
llvm::GlobalValue *llvm_used = modules[0]->getNamedGlobal("llvm.used");
if (llvm_used) {
llvm_used->eraseFromParent();
}
llvm::GlobalValue *llvm_compiler_used =
modules[0]->getNamedGlobal("llvm.compiler.used");
if (llvm_compiler_used) {
llvm_compiler_used->eraseFromParent();
}
// Also drop the dummy runtime api usage. We only needed it so
// that the declarations are retained in the module during the
// linking procedure above.
llvm::GlobalValue *runtime_api =
modules[0]->getNamedGlobal("halide_runtime_api_functions");
if (runtime_api) {
runtime_api->eraseFromParent();
}
}
/** When JIT-compiling on 32-bit windows, we need to rewrite calls
* to name-mangled win32 api calls to non-name-mangled versions.
*/
void undo_win32_name_mangling(llvm::Module *m) {
llvm::IRBuilder<> builder(m->getContext());
// For every function prototype...
for (llvm::Module::iterator iter = m->begin(); iter != m->end(); ++iter) {
llvm::Function &f = *iter;
string n = Internal::get_llvm_function_name(f);
// if it's a __stdcall call that starts with \01_, then we're making a win32 api call
if (f.getCallingConv() == llvm::CallingConv::X86_StdCall &&
f.empty() &&
n.size() > 2 && n[0] == 1 && n[1] == '_') {
// Unmangle the name.
string unmangled_name = n.substr(2);
size_t at = unmangled_name.rfind('@');
unmangled_name = unmangled_name.substr(0, at);
// Extern declare the unmangled version.
llvm::Function *unmangled = llvm::Function::Create(f.getFunctionType(), f.getLinkage(), unmangled_name, m);
unmangled->setCallingConv(f.getCallingConv());
// Add a body to the mangled version that calls the unmangled version.
llvm::BasicBlock *block = llvm::BasicBlock::Create(m->getContext(), "entry", &f);
builder.SetInsertPoint(block);
vector<llvm::Value *> args;
for (auto &arg : f.args()) {
args.push_back(&arg);
}
llvm::CallInst *c = builder.CreateCall(unmangled, args);
c->setCallingConv(f.getCallingConv());
if (f.getReturnType()->isVoidTy()) {
builder.CreateRetVoid();
} else {
builder.CreateRet(c);
}
}
}
}
void add_underscore_to_posix_call(llvm::CallInst *call, llvm::Function *fn, llvm::Module *m) {
string new_name = "_" + fn->getName().str();
llvm::Function *alt = m->getFunction(new_name);
if (!alt) {
alt = llvm::Function::Create(fn->getFunctionType(),
llvm::GlobalValue::ExternalLinkage,
new_name, m);
}
internal_assert(alt->getName() == new_name);
call->setCalledFunction(alt);
}
/** Windows uses _close, _open, _write, etc instead of the posix
* names. Defining stubs that redirect causes mis-compilations inside
* of mcjit, so we just rewrite uses of these functions to include an
* underscore. */
void add_underscores_to_posix_calls_on_windows(llvm::Module *m) {
string posix_fns[] = {"vsnprintf", "open", "close", "write", "fileno"};
string *posix_fns_begin = posix_fns;
string *posix_fns_end = posix_fns + sizeof(posix_fns) / sizeof(posix_fns[0]);
for (auto &fn : *m) {
for (auto &basic_block : fn) {
for (auto &instruction : basic_block) {
if (llvm::CallInst *call = llvm::dyn_cast<llvm::CallInst>(&instruction)) {
if (llvm::Function *called_fn = call->getCalledFunction()) {
if (std::find(posix_fns_begin, posix_fns_end, called_fn->getName()) != posix_fns_end) {
add_underscore_to_posix_call(call, called_fn, m);
}
}
}
}
}
}
}
} // namespace
namespace Internal {
std::unique_ptr<llvm::Module> link_with_wasm_jit_runtime(llvm::LLVMContext *c, const Target &t,
std::unique_ptr<llvm::Module> extra_module) {
bool bits_64 = (t.bits == 64);
bool debug = t.has_feature(Target::Debug);
// We only need to include things that must be linked in as callable entrypoints;
// things that are 'alwaysinline' can be included here but are unnecessary.
vector<std::unique_ptr<llvm::Module>> modules;
modules.push_back(std::move(extra_module));
modules.push_back(get_initmod_force_include_types(c, bits_64, debug));
modules.push_back(get_initmod_fake_thread_pool(c, bits_64, debug));
modules.push_back(get_initmod_posix_aligned_alloc(c, bits_64, debug));
modules.push_back(get_initmod_posix_allocator(c, bits_64, debug));
modules.push_back(get_initmod_halide_buffer_t(c, bits_64, debug));
modules.push_back(get_initmod_destructors(c, bits_64, debug));
// These two aren't necessary, since they are 100% alwaysinline
// modules.push_back(get_initmod_posix_math_ll(c));
// modules.push_back(get_initmod_wasm_math_ll(c));
modules.push_back(get_initmod_tracing(c, bits_64, debug));
modules.push_back(get_initmod_cache(c, bits_64, debug));
modules.push_back(get_initmod_to_string(c, bits_64, debug));
modules.push_back(get_initmod_alignment_32(c, bits_64, debug));
modules.push_back(get_initmod_fopen(c, bits_64, debug));
modules.push_back(get_initmod_device_interface(c, bits_64, debug));
modules.push_back(get_initmod_float16_t(c, bits_64, debug));
modules.push_back(get_initmod_errors(c, bits_64, debug));
modules.push_back(get_initmod_msan_stubs(c, bits_64, debug));
// We don't want anything marked as weak for the wasm-jit runtime,
// so convert all of them to linkonce
constexpr bool allow_stripping_all_weak_functions = true;
link_modules(modules, t, allow_stripping_all_weak_functions);
return std::move(modules[0]);
}
/** Create an llvm module containing the support code for a given target. */
std::unique_ptr<llvm::Module> get_initial_module_for_target(Target t, llvm::LLVMContext *c, bool for_shared_jit_runtime, bool just_gpu) {
enum InitialModuleType {
ModuleAOT,
ModuleAOTNoRuntime,
ModuleJITShared,
ModuleJITInlined,
ModuleGPU
} module_type;
if (t.has_feature(Target::JIT)) {
if (just_gpu) {
module_type = ModuleGPU;
} else if (for_shared_jit_runtime) {
module_type = ModuleJITShared;
} else {
module_type = ModuleJITInlined;
}
} else if (t.has_feature(Target::NoRuntime)) {
module_type = ModuleAOTNoRuntime;
} else {
module_type = ModuleAOT;
}
// Halide::Internal::debug(0) << "Getting initial module type " << (int)module_type << "\n";
internal_assert(t.bits == 32 || t.bits == 64)
<< "Bad target: " << t.to_string();
bool bits_64 = (t.bits == 64);
bool debug = t.has_feature(Target::Debug);
bool tsan = t.has_feature(Target::TSAN);
vector<std::unique_ptr<llvm::Module>> modules;
// Start with the module that defines our struct types. This must be
// included first, because when parsing modules, if two structs are
// encountered with the same fields, they are deduped, and the first name
// wins.
//
// If in the future these names become unpredictable, an alternative
// strategy is to make this module include a global variable of each type we
// care about, recover the struct types from those named globals, and then
// delete the globals in link_modules.
modules.push_back(get_initmod_force_include_types(c, bits_64, debug));
const auto add_allocator = [&]() {
modules.push_back(get_initmod_posix_aligned_alloc(c, bits_64, debug));
modules.push_back(get_initmod_posix_allocator(c, bits_64, debug));
};
if (module_type != ModuleGPU) {
if (module_type != ModuleJITInlined && module_type != ModuleAOTNoRuntime) {
// OS-dependent modules
if (t.os == Target::Linux) {
add_allocator();
modules.push_back(get_initmod_posix_allocator(c, bits_64, debug));
modules.push_back(get_initmod_posix_error_handler(c, bits_64, debug));
modules.push_back(get_initmod_posix_print(c, bits_64, debug));
if (t.arch == Target::X86) {
modules.push_back(get_initmod_linux_clock(c, bits_64, debug));
} else {
modules.push_back(get_initmod_posix_clock(c, bits_64, debug));
}
modules.push_back(get_initmod_posix_io(c, bits_64, debug));
modules.push_back(get_initmod_linux_host_cpu_count(c, bits_64, debug));
modules.push_back(get_initmod_linux_yield(c, bits_64, debug));
if (tsan) {
modules.push_back(get_initmod_posix_threads_tsan(c, bits_64, debug));
} else {
modules.push_back(get_initmod_posix_threads(c, bits_64, debug));
}
modules.push_back(get_initmod_posix_get_symbol(c, bits_64, debug));
} else if (t.os == Target::WebAssemblyRuntime) {
add_allocator();
modules.push_back(get_initmod_posix_error_handler(c, bits_64, debug));
modules.push_back(get_initmod_posix_print(c, bits_64, debug));
modules.push_back(get_initmod_posix_clock(c, bits_64, debug));
modules.push_back(get_initmod_posix_io(c, bits_64, debug));
modules.push_back(get_initmod_linux_host_cpu_count(c, bits_64, debug));
modules.push_back(get_initmod_linux_yield(c, bits_64, debug));
if (t.has_feature(Target::WasmThreads)) {
// Assume that the wasm libc will be providing pthreads
modules.push_back(get_initmod_posix_threads(c, bits_64, debug));
} else {
modules.push_back(get_initmod_fake_thread_pool(c, bits_64, debug));
}
modules.push_back(get_initmod_fake_get_symbol(c, bits_64, debug));
} else if (t.os == Target::OSX) {
add_allocator();
modules.push_back(get_initmod_posix_error_handler(c, bits_64, debug));
modules.push_back(get_initmod_posix_print(c, bits_64, debug));
modules.push_back(get_initmod_osx_clock(c, bits_64, debug));
modules.push_back(get_initmod_posix_io(c, bits_64, debug));
modules.push_back(get_initmod_osx_host_cpu_count(c, bits_64, debug));
modules.push_back(get_initmod_osx_yield(c, bits_64, debug));
if (tsan) {
modules.push_back(get_initmod_posix_threads_tsan(c, bits_64, debug));
} else {
modules.push_back(get_initmod_posix_threads(c, bits_64, debug));
}
modules.push_back(get_initmod_osx_get_symbol(c, bits_64, debug));
modules.push_back(get_initmod_osx_host_cpu_count(c, bits_64, debug));
} else if (t.os == Target::Android) {
add_allocator();
modules.push_back(get_initmod_posix_error_handler(c, bits_64, debug));
modules.push_back(get_initmod_posix_print(c, bits_64, debug));
if (t.arch == Target::ARM || t.arch == Target::RISCV) {
modules.push_back(get_initmod_android_clock(c, bits_64, debug));
} else {
modules.push_back(get_initmod_posix_clock(c, bits_64, debug));
}
modules.push_back(get_initmod_android_io(c, bits_64, debug));
modules.push_back(get_initmod_android_host_cpu_count(c, bits_64, debug));
modules.push_back(get_initmod_linux_yield(c, bits_64, debug)); // TODO: verify
if (tsan) {
modules.push_back(get_initmod_posix_threads_tsan(c, bits_64, debug));
} else {
modules.push_back(get_initmod_posix_threads(c, bits_64, debug));
}
modules.push_back(get_initmod_posix_get_symbol(c, bits_64, debug));
} else if (t.os == Target::Windows) {
modules.push_back(get_initmod_posix_aligned_alloc(c, bits_64, debug));
modules.push_back(get_initmod_posix_allocator(c, bits_64, debug));
modules.push_back(get_initmod_posix_error_handler(c, bits_64, debug));
modules.push_back(get_initmod_posix_print(c, bits_64, debug));
modules.push_back(get_initmod_windows_clock(c, bits_64, debug));
modules.push_back(get_initmod_windows_io(c, bits_64, debug));
modules.push_back(get_initmod_windows_yield(c, bits_64, debug));
if (tsan) {
modules.push_back(get_initmod_windows_threads_tsan(c, bits_64, debug));
} else {
modules.push_back(get_initmod_windows_threads(c, bits_64, debug));
}
modules.push_back(get_initmod_windows_get_symbol(c, bits_64, debug));
} else if (t.os == Target::IOS) {
add_allocator();
modules.push_back(get_initmod_posix_error_handler(c, bits_64, debug));
modules.push_back(get_initmod_posix_print(c, bits_64, debug));
modules.push_back(get_initmod_posix_clock(c, bits_64, debug));
modules.push_back(get_initmod_ios_io(c, bits_64, debug));
modules.push_back(get_initmod_osx_host_cpu_count(c, bits_64, debug));
modules.push_back(get_initmod_osx_yield(c, bits_64, debug));
if (tsan) {
modules.push_back(get_initmod_posix_threads_tsan(c, bits_64, debug));
} else {
modules.push_back(get_initmod_posix_threads(c, bits_64, debug));
}
} else if (t.os == Target::QuRT) {
modules.push_back(get_initmod_posix_aligned_alloc(c, bits_64, debug));
modules.push_back(get_initmod_qurt_allocator(c, bits_64, debug));