-
Notifications
You must be signed in to change notification settings - Fork 13.3k
/
Copy pathCodeGenModule.cpp
7894 lines (6868 loc) · 302 KB
/
CodeGenModule.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
//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This coordinates the per-module state used while generating code.
//
//===----------------------------------------------------------------------===//
#include "CodeGenModule.h"
#include "ABIInfo.h"
#include "CGBlocks.h"
#include "CGCUDARuntime.h"
#include "CGCXXABI.h"
#include "CGCall.h"
#include "CGDebugInfo.h"
#include "CGHLSLRuntime.h"
#include "CGObjCRuntime.h"
#include "CGOpenCLRuntime.h"
#include "CGOpenMPRuntime.h"
#include "CGOpenMPRuntimeGPU.h"
#include "CodeGenFunction.h"
#include "CodeGenPGO.h"
#include "ConstantEmitter.h"
#include "CoverageMappingGen.h"
#include "TargetInfo.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTLambda.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Mangle.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/Module.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Version.h"
#include "clang/CodeGen/BackendUtil.h"
#include "clang/CodeGen/ConstantInitBuilder.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/IR/AttributeMask.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ProfileSummary.h"
#include "llvm/ProfileData/InstrProfReader.h"
#include "llvm/ProfileData/SampleProf.h"
#include "llvm/Support/CRC.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/TimeProfiler.h"
#include "llvm/Support/xxhash.h"
#include "llvm/TargetParser/RISCVISAInfo.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/TargetParser/X86TargetParser.h"
#include "llvm/Transforms/Utils/BuildLibCalls.h"
#include <optional>
using namespace clang;
using namespace CodeGen;
static llvm::cl::opt<bool> LimitedCoverage(
"limited-coverage-experimental", llvm::cl::Hidden,
llvm::cl::desc("Emit limited coverage mapping information (experimental)"));
static const char AnnotationSection[] = "llvm.metadata";
static CGCXXABI *createCXXABI(CodeGenModule &CGM) {
switch (CGM.getContext().getCXXABIKind()) {
case TargetCXXABI::AppleARM64:
case TargetCXXABI::Fuchsia:
case TargetCXXABI::GenericAArch64:
case TargetCXXABI::GenericARM:
case TargetCXXABI::iOS:
case TargetCXXABI::WatchOS:
case TargetCXXABI::GenericMIPS:
case TargetCXXABI::GenericItanium:
case TargetCXXABI::WebAssembly:
case TargetCXXABI::XL:
return CreateItaniumCXXABI(CGM);
case TargetCXXABI::Microsoft:
return CreateMicrosoftCXXABI(CGM);
}
llvm_unreachable("invalid C++ ABI kind");
}
static std::unique_ptr<TargetCodeGenInfo>
createTargetCodeGenInfo(CodeGenModule &CGM) {
const TargetInfo &Target = CGM.getTarget();
const llvm::Triple &Triple = Target.getTriple();
const CodeGenOptions &CodeGenOpts = CGM.getCodeGenOpts();
switch (Triple.getArch()) {
default:
return createDefaultTargetCodeGenInfo(CGM);
case llvm::Triple::m68k:
return createM68kTargetCodeGenInfo(CGM);
case llvm::Triple::mips:
case llvm::Triple::mipsel:
if (Triple.getOS() == llvm::Triple::NaCl)
return createPNaClTargetCodeGenInfo(CGM);
return createMIPSTargetCodeGenInfo(CGM, /*IsOS32=*/true);
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
return createMIPSTargetCodeGenInfo(CGM, /*IsOS32=*/false);
case llvm::Triple::avr: {
// For passing parameters, R8~R25 are used on avr, and R18~R25 are used
// on avrtiny. For passing return value, R18~R25 are used on avr, and
// R22~R25 are used on avrtiny.
unsigned NPR = Target.getABI() == "avrtiny" ? 6 : 18;
unsigned NRR = Target.getABI() == "avrtiny" ? 4 : 8;
return createAVRTargetCodeGenInfo(CGM, NPR, NRR);
}
case llvm::Triple::aarch64:
case llvm::Triple::aarch64_32:
case llvm::Triple::aarch64_be: {
AArch64ABIKind Kind = AArch64ABIKind::AAPCS;
if (Target.getABI() == "darwinpcs")
Kind = AArch64ABIKind::DarwinPCS;
else if (Triple.isOSWindows())
return createWindowsAArch64TargetCodeGenInfo(CGM, AArch64ABIKind::Win64);
else if (Target.getABI() == "aapcs-soft")
Kind = AArch64ABIKind::AAPCSSoft;
else if (Target.getABI() == "pauthtest")
Kind = AArch64ABIKind::PAuthTest;
return createAArch64TargetCodeGenInfo(CGM, Kind);
}
case llvm::Triple::wasm32:
case llvm::Triple::wasm64: {
WebAssemblyABIKind Kind = WebAssemblyABIKind::MVP;
if (Target.getABI() == "experimental-mv")
Kind = WebAssemblyABIKind::ExperimentalMV;
return createWebAssemblyTargetCodeGenInfo(CGM, Kind);
}
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
if (Triple.getOS() == llvm::Triple::Win32)
return createWindowsARMTargetCodeGenInfo(CGM, ARMABIKind::AAPCS_VFP);
ARMABIKind Kind = ARMABIKind::AAPCS;
StringRef ABIStr = Target.getABI();
if (ABIStr == "apcs-gnu")
Kind = ARMABIKind::APCS;
else if (ABIStr == "aapcs16")
Kind = ARMABIKind::AAPCS16_VFP;
else if (CodeGenOpts.FloatABI == "hard" ||
(CodeGenOpts.FloatABI != "soft" && Triple.isHardFloatABI()))
Kind = ARMABIKind::AAPCS_VFP;
return createARMTargetCodeGenInfo(CGM, Kind);
}
case llvm::Triple::ppc: {
if (Triple.isOSAIX())
return createAIXTargetCodeGenInfo(CGM, /*Is64Bit=*/false);
bool IsSoftFloat =
CodeGenOpts.FloatABI == "soft" || Target.hasFeature("spe");
return createPPC32TargetCodeGenInfo(CGM, IsSoftFloat);
}
case llvm::Triple::ppcle: {
bool IsSoftFloat = CodeGenOpts.FloatABI == "soft";
return createPPC32TargetCodeGenInfo(CGM, IsSoftFloat);
}
case llvm::Triple::ppc64:
if (Triple.isOSAIX())
return createAIXTargetCodeGenInfo(CGM, /*Is64Bit=*/true);
if (Triple.isOSBinFormatELF()) {
PPC64_SVR4_ABIKind Kind = PPC64_SVR4_ABIKind::ELFv1;
if (Target.getABI() == "elfv2")
Kind = PPC64_SVR4_ABIKind::ELFv2;
bool IsSoftFloat = CodeGenOpts.FloatABI == "soft";
return createPPC64_SVR4_TargetCodeGenInfo(CGM, Kind, IsSoftFloat);
}
return createPPC64TargetCodeGenInfo(CGM);
case llvm::Triple::ppc64le: {
assert(Triple.isOSBinFormatELF() && "PPC64 LE non-ELF not supported!");
PPC64_SVR4_ABIKind Kind = PPC64_SVR4_ABIKind::ELFv2;
if (Target.getABI() == "elfv1")
Kind = PPC64_SVR4_ABIKind::ELFv1;
bool IsSoftFloat = CodeGenOpts.FloatABI == "soft";
return createPPC64_SVR4_TargetCodeGenInfo(CGM, Kind, IsSoftFloat);
}
case llvm::Triple::nvptx:
case llvm::Triple::nvptx64:
return createNVPTXTargetCodeGenInfo(CGM);
case llvm::Triple::msp430:
return createMSP430TargetCodeGenInfo(CGM);
case llvm::Triple::riscv32:
case llvm::Triple::riscv64: {
StringRef ABIStr = Target.getABI();
unsigned XLen = Target.getPointerWidth(LangAS::Default);
unsigned ABIFLen = 0;
if (ABIStr.ends_with("f"))
ABIFLen = 32;
else if (ABIStr.ends_with("d"))
ABIFLen = 64;
bool EABI = ABIStr.ends_with("e");
return createRISCVTargetCodeGenInfo(CGM, XLen, ABIFLen, EABI);
}
case llvm::Triple::systemz: {
bool SoftFloat = CodeGenOpts.FloatABI == "soft";
bool HasVector = !SoftFloat && Target.getABI() == "vector";
return createSystemZTargetCodeGenInfo(CGM, HasVector, SoftFloat);
}
case llvm::Triple::tce:
case llvm::Triple::tcele:
return createTCETargetCodeGenInfo(CGM);
case llvm::Triple::x86: {
bool IsDarwinVectorABI = Triple.isOSDarwin();
bool IsWin32FloatStructABI = Triple.isOSWindows() && !Triple.isOSCygMing();
if (Triple.getOS() == llvm::Triple::Win32) {
return createWinX86_32TargetCodeGenInfo(
CGM, IsDarwinVectorABI, IsWin32FloatStructABI,
CodeGenOpts.NumRegisterParameters);
}
return createX86_32TargetCodeGenInfo(
CGM, IsDarwinVectorABI, IsWin32FloatStructABI,
CodeGenOpts.NumRegisterParameters, CodeGenOpts.FloatABI == "soft");
}
case llvm::Triple::x86_64: {
StringRef ABI = Target.getABI();
X86AVXABILevel AVXLevel = (ABI == "avx512" ? X86AVXABILevel::AVX512
: ABI == "avx" ? X86AVXABILevel::AVX
: X86AVXABILevel::None);
switch (Triple.getOS()) {
case llvm::Triple::Win32:
return createWinX86_64TargetCodeGenInfo(CGM, AVXLevel);
default:
return createX86_64TargetCodeGenInfo(CGM, AVXLevel);
}
}
case llvm::Triple::hexagon:
return createHexagonTargetCodeGenInfo(CGM);
case llvm::Triple::lanai:
return createLanaiTargetCodeGenInfo(CGM);
case llvm::Triple::r600:
return createAMDGPUTargetCodeGenInfo(CGM);
case llvm::Triple::amdgcn:
return createAMDGPUTargetCodeGenInfo(CGM);
case llvm::Triple::sparc:
return createSparcV8TargetCodeGenInfo(CGM);
case llvm::Triple::sparcv9:
return createSparcV9TargetCodeGenInfo(CGM);
case llvm::Triple::xcore:
return createXCoreTargetCodeGenInfo(CGM);
case llvm::Triple::arc:
return createARCTargetCodeGenInfo(CGM);
case llvm::Triple::spir:
case llvm::Triple::spir64:
return createCommonSPIRTargetCodeGenInfo(CGM);
case llvm::Triple::spirv32:
case llvm::Triple::spirv64:
case llvm::Triple::spirv:
return createSPIRVTargetCodeGenInfo(CGM);
case llvm::Triple::dxil:
return createDirectXTargetCodeGenInfo(CGM);
case llvm::Triple::ve:
return createVETargetCodeGenInfo(CGM);
case llvm::Triple::csky: {
bool IsSoftFloat = !Target.hasFeature("hard-float-abi");
bool hasFP64 =
Target.hasFeature("fpuv2_df") || Target.hasFeature("fpuv3_df");
return createCSKYTargetCodeGenInfo(CGM, IsSoftFloat ? 0
: hasFP64 ? 64
: 32);
}
case llvm::Triple::bpfeb:
case llvm::Triple::bpfel:
return createBPFTargetCodeGenInfo(CGM);
case llvm::Triple::loongarch32:
case llvm::Triple::loongarch64: {
StringRef ABIStr = Target.getABI();
unsigned ABIFRLen = 0;
if (ABIStr.ends_with("f"))
ABIFRLen = 32;
else if (ABIStr.ends_with("d"))
ABIFRLen = 64;
return createLoongArchTargetCodeGenInfo(
CGM, Target.getPointerWidth(LangAS::Default), ABIFRLen);
}
}
}
const TargetCodeGenInfo &CodeGenModule::getTargetCodeGenInfo() {
if (!TheTargetCodeGenInfo)
TheTargetCodeGenInfo = createTargetCodeGenInfo(*this);
return *TheTargetCodeGenInfo;
}
CodeGenModule::CodeGenModule(ASTContext &C,
IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS,
const HeaderSearchOptions &HSO,
const PreprocessorOptions &PPO,
const CodeGenOptions &CGO, llvm::Module &M,
DiagnosticsEngine &diags,
CoverageSourceInfo *CoverageInfo)
: Context(C), LangOpts(C.getLangOpts()), FS(FS), HeaderSearchOpts(HSO),
PreprocessorOpts(PPO), CodeGenOpts(CGO), TheModule(M), Diags(diags),
Target(C.getTargetInfo()), ABI(createCXXABI(*this)),
VMContext(M.getContext()), VTables(*this), StackHandler(diags),
SanitizerMD(new SanitizerMetadata(*this)) {
// Initialize the type cache.
Types.reset(new CodeGenTypes(*this));
llvm::LLVMContext &LLVMContext = M.getContext();
VoidTy = llvm::Type::getVoidTy(LLVMContext);
Int8Ty = llvm::Type::getInt8Ty(LLVMContext);
Int16Ty = llvm::Type::getInt16Ty(LLVMContext);
Int32Ty = llvm::Type::getInt32Ty(LLVMContext);
Int64Ty = llvm::Type::getInt64Ty(LLVMContext);
HalfTy = llvm::Type::getHalfTy(LLVMContext);
BFloatTy = llvm::Type::getBFloatTy(LLVMContext);
FloatTy = llvm::Type::getFloatTy(LLVMContext);
DoubleTy = llvm::Type::getDoubleTy(LLVMContext);
PointerWidthInBits = C.getTargetInfo().getPointerWidth(LangAS::Default);
PointerAlignInBytes =
C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(LangAS::Default))
.getQuantity();
SizeSizeInBytes =
C.toCharUnitsFromBits(C.getTargetInfo().getMaxPointerWidth()).getQuantity();
IntAlignInBytes =
C.toCharUnitsFromBits(C.getTargetInfo().getIntAlign()).getQuantity();
CharTy =
llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getCharWidth());
IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth());
IntPtrTy = llvm::IntegerType::get(LLVMContext,
C.getTargetInfo().getMaxPointerWidth());
Int8PtrTy = llvm::PointerType::get(LLVMContext,
C.getTargetAddressSpace(LangAS::Default));
const llvm::DataLayout &DL = M.getDataLayout();
AllocaInt8PtrTy =
llvm::PointerType::get(LLVMContext, DL.getAllocaAddrSpace());
GlobalsInt8PtrTy =
llvm::PointerType::get(LLVMContext, DL.getDefaultGlobalsAddressSpace());
ConstGlobalsPtrTy = llvm::PointerType::get(
LLVMContext, C.getTargetAddressSpace(GetGlobalConstantAddressSpace()));
ASTAllocaAddressSpace = getTargetCodeGenInfo().getASTAllocaAddressSpace();
// Build C++20 Module initializers.
// TODO: Add Microsoft here once we know the mangling required for the
// initializers.
CXX20ModuleInits =
LangOpts.CPlusPlusModules && getCXXABI().getMangleContext().getKind() ==
ItaniumMangleContext::MK_Itanium;
RuntimeCC = getTargetCodeGenInfo().getABIInfo().getRuntimeCC();
if (LangOpts.ObjC)
createObjCRuntime();
if (LangOpts.OpenCL)
createOpenCLRuntime();
if (LangOpts.OpenMP)
createOpenMPRuntime();
if (LangOpts.CUDA)
createCUDARuntime();
if (LangOpts.HLSL)
createHLSLRuntime();
// Enable TBAA unless it's suppressed. ThreadSanitizer needs TBAA even at O0.
if (LangOpts.Sanitize.has(SanitizerKind::Thread) ||
(!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0))
TBAA.reset(new CodeGenTBAA(Context, getTypes(), TheModule, CodeGenOpts,
getLangOpts()));
// If debug info or coverage generation is enabled, create the CGDebugInfo
// object.
if (CodeGenOpts.getDebugInfo() != llvm::codegenoptions::NoDebugInfo ||
CodeGenOpts.CoverageNotesFile.size() ||
CodeGenOpts.CoverageDataFile.size())
DebugInfo.reset(new CGDebugInfo(*this));
Block.GlobalUniqueCount = 0;
if (C.getLangOpts().ObjC)
ObjCData.reset(new ObjCEntrypoints());
if (CodeGenOpts.hasProfileClangUse()) {
auto ReaderOrErr = llvm::IndexedInstrProfReader::create(
CodeGenOpts.ProfileInstrumentUsePath, *FS,
CodeGenOpts.ProfileRemappingFile);
// We're checking for profile read errors in CompilerInvocation, so if
// there was an error it should've already been caught. If it hasn't been
// somehow, trip an assertion.
assert(ReaderOrErr);
PGOReader = std::move(ReaderOrErr.get());
}
// If coverage mapping generation is enabled, create the
// CoverageMappingModuleGen object.
if (CodeGenOpts.CoverageMapping)
CoverageMapping.reset(new CoverageMappingModuleGen(*this, *CoverageInfo));
// Generate the module name hash here if needed.
if (CodeGenOpts.UniqueInternalLinkageNames &&
!getModule().getSourceFileName().empty()) {
std::string Path = getModule().getSourceFileName();
// Check if a path substitution is needed from the MacroPrefixMap.
for (const auto &Entry : LangOpts.MacroPrefixMap)
if (Path.rfind(Entry.first, 0) != std::string::npos) {
Path = Entry.second + Path.substr(Entry.first.size());
break;
}
ModuleNameHash = llvm::getUniqueInternalLinkagePostfix(Path);
}
// Record mregparm value now so it is visible through all of codegen.
if (Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86)
getModule().addModuleFlag(llvm::Module::Error, "NumRegisterParameters",
CodeGenOpts.NumRegisterParameters);
}
CodeGenModule::~CodeGenModule() {}
void CodeGenModule::createObjCRuntime() {
// This is just isGNUFamily(), but we want to force implementors of
// new ABIs to decide how best to do this.
switch (LangOpts.ObjCRuntime.getKind()) {
case ObjCRuntime::GNUstep:
case ObjCRuntime::GCC:
case ObjCRuntime::ObjFW:
ObjCRuntime.reset(CreateGNUObjCRuntime(*this));
return;
case ObjCRuntime::FragileMacOSX:
case ObjCRuntime::MacOSX:
case ObjCRuntime::iOS:
case ObjCRuntime::WatchOS:
ObjCRuntime.reset(CreateMacObjCRuntime(*this));
return;
}
llvm_unreachable("bad runtime kind");
}
void CodeGenModule::createOpenCLRuntime() {
OpenCLRuntime.reset(new CGOpenCLRuntime(*this));
}
void CodeGenModule::createOpenMPRuntime() {
// Select a specialized code generation class based on the target, if any.
// If it does not exist use the default implementation.
switch (getTriple().getArch()) {
case llvm::Triple::nvptx:
case llvm::Triple::nvptx64:
case llvm::Triple::amdgcn:
assert(getLangOpts().OpenMPIsTargetDevice &&
"OpenMP AMDGPU/NVPTX is only prepared to deal with device code.");
OpenMPRuntime.reset(new CGOpenMPRuntimeGPU(*this));
break;
default:
if (LangOpts.OpenMPSimd)
OpenMPRuntime.reset(new CGOpenMPSIMDRuntime(*this));
else
OpenMPRuntime.reset(new CGOpenMPRuntime(*this));
break;
}
}
void CodeGenModule::createCUDARuntime() {
CUDARuntime.reset(CreateNVCUDARuntime(*this));
}
void CodeGenModule::createHLSLRuntime() {
HLSLRuntime.reset(new CGHLSLRuntime(*this));
}
void CodeGenModule::addReplacement(StringRef Name, llvm::Constant *C) {
Replacements[Name] = C;
}
void CodeGenModule::applyReplacements() {
for (auto &I : Replacements) {
StringRef MangledName = I.first;
llvm::Constant *Replacement = I.second;
llvm::GlobalValue *Entry = GetGlobalValue(MangledName);
if (!Entry)
continue;
auto *OldF = cast<llvm::Function>(Entry);
auto *NewF = dyn_cast<llvm::Function>(Replacement);
if (!NewF) {
if (auto *Alias = dyn_cast<llvm::GlobalAlias>(Replacement)) {
NewF = dyn_cast<llvm::Function>(Alias->getAliasee());
} else {
auto *CE = cast<llvm::ConstantExpr>(Replacement);
assert(CE->getOpcode() == llvm::Instruction::BitCast ||
CE->getOpcode() == llvm::Instruction::GetElementPtr);
NewF = dyn_cast<llvm::Function>(CE->getOperand(0));
}
}
// Replace old with new, but keep the old order.
OldF->replaceAllUsesWith(Replacement);
if (NewF) {
NewF->removeFromParent();
OldF->getParent()->getFunctionList().insertAfter(OldF->getIterator(),
NewF);
}
OldF->eraseFromParent();
}
}
void CodeGenModule::addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C) {
GlobalValReplacements.push_back(std::make_pair(GV, C));
}
void CodeGenModule::applyGlobalValReplacements() {
for (auto &I : GlobalValReplacements) {
llvm::GlobalValue *GV = I.first;
llvm::Constant *C = I.second;
GV->replaceAllUsesWith(C);
GV->eraseFromParent();
}
}
// This is only used in aliases that we created and we know they have a
// linear structure.
static const llvm::GlobalValue *getAliasedGlobal(const llvm::GlobalValue *GV) {
const llvm::Constant *C;
if (auto *GA = dyn_cast<llvm::GlobalAlias>(GV))
C = GA->getAliasee();
else if (auto *GI = dyn_cast<llvm::GlobalIFunc>(GV))
C = GI->getResolver();
else
return GV;
const auto *AliaseeGV = dyn_cast<llvm::GlobalValue>(C->stripPointerCasts());
if (!AliaseeGV)
return nullptr;
const llvm::GlobalValue *FinalGV = AliaseeGV->getAliaseeObject();
if (FinalGV == GV)
return nullptr;
return FinalGV;
}
static bool checkAliasedGlobal(
const ASTContext &Context, DiagnosticsEngine &Diags, SourceLocation Location,
bool IsIFunc, const llvm::GlobalValue *Alias, const llvm::GlobalValue *&GV,
const llvm::MapVector<GlobalDecl, StringRef> &MangledDeclNames,
SourceRange AliasRange) {
GV = getAliasedGlobal(Alias);
if (!GV) {
Diags.Report(Location, diag::err_cyclic_alias) << IsIFunc;
return false;
}
if (GV->hasCommonLinkage()) {
const llvm::Triple &Triple = Context.getTargetInfo().getTriple();
if (Triple.getObjectFormat() == llvm::Triple::XCOFF) {
Diags.Report(Location, diag::err_alias_to_common);
return false;
}
}
if (GV->isDeclaration()) {
Diags.Report(Location, diag::err_alias_to_undefined) << IsIFunc << IsIFunc;
Diags.Report(Location, diag::note_alias_requires_mangled_name)
<< IsIFunc << IsIFunc;
// Provide a note if the given function is not found and exists as a
// mangled name.
for (const auto &[Decl, Name] : MangledDeclNames) {
if (const auto *ND = dyn_cast<NamedDecl>(Decl.getDecl())) {
if (ND->getName() == GV->getName()) {
Diags.Report(Location, diag::note_alias_mangled_name_alternative)
<< Name
<< FixItHint::CreateReplacement(
AliasRange,
(Twine(IsIFunc ? "ifunc" : "alias") + "(\"" + Name + "\")")
.str());
}
}
}
return false;
}
if (IsIFunc) {
// Check resolver function type.
const auto *F = dyn_cast<llvm::Function>(GV);
if (!F) {
Diags.Report(Location, diag::err_alias_to_undefined)
<< IsIFunc << IsIFunc;
return false;
}
llvm::FunctionType *FTy = F->getFunctionType();
if (!FTy->getReturnType()->isPointerTy()) {
Diags.Report(Location, diag::err_ifunc_resolver_return);
return false;
}
}
return true;
}
// Emit a warning if toc-data attribute is requested for global variables that
// have aliases and remove the toc-data attribute.
static void checkAliasForTocData(llvm::GlobalVariable *GVar,
const CodeGenOptions &CodeGenOpts,
DiagnosticsEngine &Diags,
SourceLocation Location) {
if (GVar->hasAttribute("toc-data")) {
auto GVId = GVar->getName();
// Is this a global variable specified by the user as local?
if ((llvm::binary_search(CodeGenOpts.TocDataVarsUserSpecified, GVId))) {
Diags.Report(Location, diag::warn_toc_unsupported_type)
<< GVId << "the variable has an alias";
}
llvm::AttributeSet CurrAttributes = GVar->getAttributes();
llvm::AttributeSet NewAttributes =
CurrAttributes.removeAttribute(GVar->getContext(), "toc-data");
GVar->setAttributes(NewAttributes);
}
}
void CodeGenModule::checkAliases() {
// Check if the constructed aliases are well formed. It is really unfortunate
// that we have to do this in CodeGen, but we only construct mangled names
// and aliases during codegen.
bool Error = false;
DiagnosticsEngine &Diags = getDiags();
for (const GlobalDecl &GD : Aliases) {
const auto *D = cast<ValueDecl>(GD.getDecl());
SourceLocation Location;
SourceRange Range;
bool IsIFunc = D->hasAttr<IFuncAttr>();
if (const Attr *A = D->getDefiningAttr()) {
Location = A->getLocation();
Range = A->getRange();
} else
llvm_unreachable("Not an alias or ifunc?");
StringRef MangledName = getMangledName(GD);
llvm::GlobalValue *Alias = GetGlobalValue(MangledName);
const llvm::GlobalValue *GV = nullptr;
if (!checkAliasedGlobal(getContext(), Diags, Location, IsIFunc, Alias, GV,
MangledDeclNames, Range)) {
Error = true;
continue;
}
if (getContext().getTargetInfo().getTriple().isOSAIX())
if (const llvm::GlobalVariable *GVar =
dyn_cast<const llvm::GlobalVariable>(GV))
checkAliasForTocData(const_cast<llvm::GlobalVariable *>(GVar),
getCodeGenOpts(), Diags, Location);
llvm::Constant *Aliasee =
IsIFunc ? cast<llvm::GlobalIFunc>(Alias)->getResolver()
: cast<llvm::GlobalAlias>(Alias)->getAliasee();
llvm::GlobalValue *AliaseeGV;
if (auto CE = dyn_cast<llvm::ConstantExpr>(Aliasee))
AliaseeGV = cast<llvm::GlobalValue>(CE->getOperand(0));
else
AliaseeGV = cast<llvm::GlobalValue>(Aliasee);
if (const SectionAttr *SA = D->getAttr<SectionAttr>()) {
StringRef AliasSection = SA->getName();
if (AliasSection != AliaseeGV->getSection())
Diags.Report(SA->getLocation(), diag::warn_alias_with_section)
<< AliasSection << IsIFunc << IsIFunc;
}
// We have to handle alias to weak aliases in here. LLVM itself disallows
// this since the object semantics would not match the IL one. For
// compatibility with gcc we implement it by just pointing the alias
// to its aliasee's aliasee. We also warn, since the user is probably
// expecting the link to be weak.
if (auto *GA = dyn_cast<llvm::GlobalAlias>(AliaseeGV)) {
if (GA->isInterposable()) {
Diags.Report(Location, diag::warn_alias_to_weak_alias)
<< GV->getName() << GA->getName() << IsIFunc;
Aliasee = llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(
GA->getAliasee(), Alias->getType());
if (IsIFunc)
cast<llvm::GlobalIFunc>(Alias)->setResolver(Aliasee);
else
cast<llvm::GlobalAlias>(Alias)->setAliasee(Aliasee);
}
}
// ifunc resolvers are usually implemented to run before sanitizer
// initialization. Disable instrumentation to prevent the ordering issue.
if (IsIFunc)
cast<llvm::Function>(Aliasee)->addFnAttr(
llvm::Attribute::DisableSanitizerInstrumentation);
}
if (!Error)
return;
for (const GlobalDecl &GD : Aliases) {
StringRef MangledName = getMangledName(GD);
llvm::GlobalValue *Alias = GetGlobalValue(MangledName);
Alias->replaceAllUsesWith(llvm::PoisonValue::get(Alias->getType()));
Alias->eraseFromParent();
}
}
void CodeGenModule::clear() {
DeferredDeclsToEmit.clear();
EmittedDeferredDecls.clear();
DeferredAnnotations.clear();
if (OpenMPRuntime)
OpenMPRuntime->clear();
}
void InstrProfStats::reportDiagnostics(DiagnosticsEngine &Diags,
StringRef MainFile) {
if (!hasDiagnostics())
return;
if (VisitedInMainFile > 0 && VisitedInMainFile == MissingInMainFile) {
if (MainFile.empty())
MainFile = "<stdin>";
Diags.Report(diag::warn_profile_data_unprofiled) << MainFile;
} else {
if (Mismatched > 0)
Diags.Report(diag::warn_profile_data_out_of_date) << Visited << Mismatched;
if (Missing > 0)
Diags.Report(diag::warn_profile_data_missing) << Visited << Missing;
}
}
static std::optional<llvm::GlobalValue::VisibilityTypes>
getLLVMVisibility(clang::LangOptions::VisibilityFromDLLStorageClassKinds K) {
// Map to LLVM visibility.
switch (K) {
case clang::LangOptions::VisibilityFromDLLStorageClassKinds::Keep:
return std::nullopt;
case clang::LangOptions::VisibilityFromDLLStorageClassKinds::Default:
return llvm::GlobalValue::DefaultVisibility;
case clang::LangOptions::VisibilityFromDLLStorageClassKinds::Hidden:
return llvm::GlobalValue::HiddenVisibility;
case clang::LangOptions::VisibilityFromDLLStorageClassKinds::Protected:
return llvm::GlobalValue::ProtectedVisibility;
}
llvm_unreachable("unknown option value!");
}
static void
setLLVMVisibility(llvm::GlobalValue &GV,
std::optional<llvm::GlobalValue::VisibilityTypes> V) {
if (!V)
return;
// Reset DSO locality before setting the visibility. This removes
// any effects that visibility options and annotations may have
// had on the DSO locality. Setting the visibility will implicitly set
// appropriate globals to DSO Local; however, this will be pessimistic
// w.r.t. to the normal compiler IRGen.
GV.setDSOLocal(false);
GV.setVisibility(*V);
}
static void setVisibilityFromDLLStorageClass(const clang::LangOptions &LO,
llvm::Module &M) {
if (!LO.VisibilityFromDLLStorageClass)
return;
std::optional<llvm::GlobalValue::VisibilityTypes> DLLExportVisibility =
getLLVMVisibility(LO.getDLLExportVisibility());
std::optional<llvm::GlobalValue::VisibilityTypes>
NoDLLStorageClassVisibility =
getLLVMVisibility(LO.getNoDLLStorageClassVisibility());
std::optional<llvm::GlobalValue::VisibilityTypes>
ExternDeclDLLImportVisibility =
getLLVMVisibility(LO.getExternDeclDLLImportVisibility());
std::optional<llvm::GlobalValue::VisibilityTypes>
ExternDeclNoDLLStorageClassVisibility =
getLLVMVisibility(LO.getExternDeclNoDLLStorageClassVisibility());
for (llvm::GlobalValue &GV : M.global_values()) {
if (GV.hasAppendingLinkage() || GV.hasLocalLinkage())
continue;
if (GV.isDeclarationForLinker())
setLLVMVisibility(GV, GV.getDLLStorageClass() ==
llvm::GlobalValue::DLLImportStorageClass
? ExternDeclDLLImportVisibility
: ExternDeclNoDLLStorageClassVisibility);
else
setLLVMVisibility(GV, GV.getDLLStorageClass() ==
llvm::GlobalValue::DLLExportStorageClass
? DLLExportVisibility
: NoDLLStorageClassVisibility);
GV.setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass);
}
}
static bool isStackProtectorOn(const LangOptions &LangOpts,
const llvm::Triple &Triple,
clang::LangOptions::StackProtectorMode Mode) {
if (Triple.isAMDGPU() || Triple.isNVPTX())
return false;
return LangOpts.getStackProtector() == Mode;
}
void CodeGenModule::Release() {
Module *Primary = getContext().getCurrentNamedModule();
if (CXX20ModuleInits && Primary && !Primary->isHeaderLikeModule())
EmitModuleInitializers(Primary);
EmitDeferred();
DeferredDecls.insert(EmittedDeferredDecls.begin(),
EmittedDeferredDecls.end());
EmittedDeferredDecls.clear();
EmitVTablesOpportunistically();
applyGlobalValReplacements();
applyReplacements();
emitMultiVersionFunctions();
if (Context.getLangOpts().IncrementalExtensions &&
GlobalTopLevelStmtBlockInFlight.first) {
const TopLevelStmtDecl *TLSD = GlobalTopLevelStmtBlockInFlight.second;
GlobalTopLevelStmtBlockInFlight.first->FinishFunction(TLSD->getEndLoc());
GlobalTopLevelStmtBlockInFlight = {nullptr, nullptr};
}
// Module implementations are initialized the same way as a regular TU that
// imports one or more modules.
if (CXX20ModuleInits && Primary && Primary->isInterfaceOrPartition())
EmitCXXModuleInitFunc(Primary);
else
EmitCXXGlobalInitFunc();
EmitCXXGlobalCleanUpFunc();
registerGlobalDtorsWithAtExit();
EmitCXXThreadLocalInitFunc();
if (ObjCRuntime)
if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction())
AddGlobalCtor(ObjCInitFunction);
if (Context.getLangOpts().CUDA && CUDARuntime) {
if (llvm::Function *CudaCtorFunction = CUDARuntime->finalizeModule())
AddGlobalCtor(CudaCtorFunction);
}
if (OpenMPRuntime) {
OpenMPRuntime->createOffloadEntriesAndInfoMetadata();
OpenMPRuntime->clear();
}
if (PGOReader) {
getModule().setProfileSummary(
PGOReader->getSummary(/* UseCS */ false).getMD(VMContext),
llvm::ProfileSummary::PSK_Instr);
if (PGOStats.hasDiagnostics())
PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
}
llvm::stable_sort(GlobalCtors, [](const Structor &L, const Structor &R) {
return L.LexOrder < R.LexOrder;
});
EmitCtorList(GlobalCtors, "llvm.global_ctors");
EmitCtorList(GlobalDtors, "llvm.global_dtors");
EmitGlobalAnnotations();
EmitStaticExternCAliases();
checkAliases();
EmitDeferredUnusedCoverageMappings();
CodeGenPGO(*this).setValueProfilingFlag(getModule());
CodeGenPGO(*this).setProfileVersion(getModule());
if (CoverageMapping)
CoverageMapping->emit();
if (CodeGenOpts.SanitizeCfiCrossDso) {
CodeGenFunction(*this).EmitCfiCheckFail();
CodeGenFunction(*this).EmitCfiCheckStub();
}
if (LangOpts.Sanitize.has(SanitizerKind::KCFI))
finalizeKCFITypes();
emitAtAvailableLinkGuard();
if (Context.getTargetInfo().getTriple().isWasm())
EmitMainVoidAlias();
if (getTriple().isAMDGPU() ||
(getTriple().isSPIRV() && getTriple().getVendor() == llvm::Triple::AMD)) {
// Emit amdhsa_code_object_version module flag, which is code object version
// times 100.
if (getTarget().getTargetOpts().CodeObjectVersion !=
llvm::CodeObjectVersionKind::COV_None) {
getModule().addModuleFlag(llvm::Module::Error,
"amdhsa_code_object_version",
getTarget().getTargetOpts().CodeObjectVersion);
}
// Currently, "-mprintf-kind" option is only supported for HIP
if (LangOpts.HIP) {
auto *MDStr = llvm::MDString::get(
getLLVMContext(), (getTarget().getTargetOpts().AMDGPUPrintfKindVal ==
TargetOptions::AMDGPUPrintfKind::Hostcall)
? "hostcall"
: "buffered");
getModule().addModuleFlag(llvm::Module::Error, "amdgpu_printf_kind",
MDStr);
}
}
// Emit a global array containing all external kernels or device variables
// used by host functions and mark it as used for CUDA/HIP. This is necessary
// to get kernels or device variables in archives linked in even if these
// kernels or device variables are only used in host functions.
if (!Context.CUDAExternalDeviceDeclODRUsedByHost.empty()) {
SmallVector<llvm::Constant *, 8> UsedArray;
for (auto D : Context.CUDAExternalDeviceDeclODRUsedByHost) {
GlobalDecl GD;
if (auto *FD = dyn_cast<FunctionDecl>(D))
GD = GlobalDecl(FD, KernelReferenceKind::Kernel);
else
GD = GlobalDecl(D);
UsedArray.push_back(llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(
GetAddrOfGlobal(GD), Int8PtrTy));
}
llvm::ArrayType *ATy = llvm::ArrayType::get(Int8PtrTy, UsedArray.size());
auto *GV = new llvm::GlobalVariable(
getModule(), ATy, false, llvm::GlobalValue::InternalLinkage,
llvm::ConstantArray::get(ATy, UsedArray), "__clang_gpu_used_external");
addCompilerUsedGlobal(GV);
}
if (LangOpts.HIP && !getLangOpts().OffloadingNewDriver) {
// Emit a unique ID so that host and device binaries from the same
// compilation unit can be associated.
auto *GV = new llvm::GlobalVariable(
getModule(), Int8Ty, false, llvm::GlobalValue::ExternalLinkage,
llvm::Constant::getNullValue(Int8Ty),
"__hip_cuid_" + getContext().getCUIDHash());
addCompilerUsedGlobal(GV);
}
emitLLVMUsed();
if (SanStats)
SanStats->finish();
if (CodeGenOpts.Autolink &&
(Context.getLangOpts().Modules || !LinkerOptionsMetadata.empty())) {
EmitModuleLinkOptions();
}
// On ELF we pass the dependent library specifiers directly to the linker
// without manipulating them. This is in contrast to other platforms where
// they are mapped to a specific linker option by the compiler. This
// difference is a result of the greater variety of ELF linkers and the fact
// that ELF linkers tend to handle libraries in a more complicated fashion
// than on other platforms. This forces us to defer handling the dependent
// libs to the linker.
//
// CUDA/HIP device and host libraries are different. Currently there is no
// way to differentiate dependent libraries for host or device. Existing
// usage of #pragma comment(lib, *) is intended for host libraries on
// Windows. Therefore emit llvm.dependent-libraries only for host.
if (!ELFDependentLibraries.empty() && !Context.getLangOpts().CUDAIsDevice) {
auto *NMD = getModule().getOrInsertNamedMetadata("llvm.dependent-libraries");
for (auto *MD : ELFDependentLibraries)
NMD->addOperand(MD);
}
if (CodeGenOpts.DwarfVersion) {
getModule().addModuleFlag(llvm::Module::Max, "Dwarf Version",
CodeGenOpts.DwarfVersion);
}