forked from llvm/llvm-project
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathecho.cpp
1226 lines (1075 loc) · 39.7 KB
/
echo.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
//===-- echo.cpp - tool for testing libLLVM and llvm-c API ----------------===//
//
// 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 file implements the --echo command in llvm-c-test.
//
// This command uses the C API to read a module and output an exact copy of it
// as output. It is used to check that the resulting module matches the input
// to validate that the C API can read and write modules properly.
//
//===----------------------------------------------------------------------===//
#include "llvm-c-test.h"
#include "llvm-c/DebugInfo.h"
#include "llvm-c/Target.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/ErrorHandling.h"
#include <stdio.h>
#include <stdlib.h>
using namespace llvm;
// Provide DenseMapInfo for C API opaque types.
template<typename T>
struct CAPIDenseMap {};
// The default DenseMapInfo require to know about pointer alignement.
// Because the C API uses opaques pointer types, their alignement is unknown.
// As a result, we need to roll out our own implementation.
template<typename T>
struct CAPIDenseMap<T*> {
struct CAPIDenseMapInfo {
static inline T* getEmptyKey() {
uintptr_t Val = static_cast<uintptr_t>(-1);
return reinterpret_cast<T*>(Val);
}
static inline T* getTombstoneKey() {
uintptr_t Val = static_cast<uintptr_t>(-2);
return reinterpret_cast<T*>(Val);
}
static unsigned getHashValue(const T *PtrVal) {
return hash_value(PtrVal);
}
static bool isEqual(const T *LHS, const T *RHS) { return LHS == RHS; }
};
typedef DenseMap<T*, T*, CAPIDenseMapInfo> Map;
};
typedef CAPIDenseMap<LLVMValueRef>::Map ValueMap;
typedef CAPIDenseMap<LLVMBasicBlockRef>::Map BasicBlockMap;
struct TypeCloner {
LLVMModuleRef M;
LLVMContextRef Ctx;
TypeCloner(LLVMModuleRef M): M(M), Ctx(LLVMGetModuleContext(M)) {}
LLVMTypeRef Clone(LLVMValueRef Src) {
return Clone(LLVMTypeOf(Src));
}
LLVMTypeRef Clone(LLVMTypeRef Src) {
LLVMTypeKind Kind = LLVMGetTypeKind(Src);
switch (Kind) {
case LLVMVoidTypeKind:
return LLVMVoidTypeInContext(Ctx);
case LLVMHalfTypeKind:
return LLVMHalfTypeInContext(Ctx);
case LLVMFloatTypeKind:
return LLVMFloatTypeInContext(Ctx);
case LLVMDoubleTypeKind:
return LLVMDoubleTypeInContext(Ctx);
case LLVMX86_FP80TypeKind:
return LLVMX86FP80TypeInContext(Ctx);
case LLVMFP128TypeKind:
return LLVMFP128TypeInContext(Ctx);
case LLVMPPC_FP128TypeKind:
return LLVMPPCFP128TypeInContext(Ctx);
case LLVMLabelTypeKind:
return LLVMLabelTypeInContext(Ctx);
case LLVMIntegerTypeKind:
return LLVMIntTypeInContext(Ctx, LLVMGetIntTypeWidth(Src));
case LLVMFunctionTypeKind: {
unsigned ParamCount = LLVMCountParamTypes(Src);
LLVMTypeRef* Params = nullptr;
if (ParamCount > 0) {
Params = static_cast<LLVMTypeRef*>(
safe_malloc(ParamCount * sizeof(LLVMTypeRef)));
LLVMGetParamTypes(Src, Params);
for (unsigned i = 0; i < ParamCount; i++)
Params[i] = Clone(Params[i]);
}
LLVMTypeRef FunTy = LLVMFunctionType(Clone(LLVMGetReturnType(Src)),
Params, ParamCount,
LLVMIsFunctionVarArg(Src));
if (ParamCount > 0)
free(Params);
return FunTy;
}
case LLVMStructTypeKind: {
LLVMTypeRef S = nullptr;
const char *Name = LLVMGetStructName(Src);
if (Name) {
S = LLVMGetTypeByName(M, Name);
if (S)
return S;
S = LLVMStructCreateNamed(Ctx, Name);
if (LLVMIsOpaqueStruct(Src))
return S;
}
unsigned EltCount = LLVMCountStructElementTypes(Src);
SmallVector<LLVMTypeRef, 8> Elts;
for (unsigned i = 0; i < EltCount; i++)
Elts.push_back(Clone(LLVMStructGetTypeAtIndex(Src, i)));
if (Name)
LLVMStructSetBody(S, Elts.data(), EltCount, LLVMIsPackedStruct(Src));
else
S = LLVMStructTypeInContext(Ctx, Elts.data(), EltCount,
LLVMIsPackedStruct(Src));
return S;
}
case LLVMArrayTypeKind:
return LLVMArrayType(
Clone(LLVMGetElementType(Src)),
LLVMGetArrayLength(Src)
);
case LLVMPointerTypeKind:
return LLVMPointerType(
Clone(LLVMGetElementType(Src)),
LLVMGetPointerAddressSpace(Src)
);
case LLVMVectorTypeKind:
return LLVMVectorType(
Clone(LLVMGetElementType(Src)),
LLVMGetVectorSize(Src)
);
case LLVMMetadataTypeKind:
return LLVMMetadataTypeInContext(Ctx);
case LLVMX86_MMXTypeKind:
return LLVMX86MMXTypeInContext(Ctx);
case LLVMTokenTypeKind:
return LLVMTokenTypeInContext(Ctx);
}
fprintf(stderr, "%d is not a supported typekind\n", Kind);
exit(-1);
}
};
static ValueMap clone_params(LLVMValueRef Src, LLVMValueRef Dst) {
unsigned Count = LLVMCountParams(Src);
if (Count != LLVMCountParams(Dst))
report_fatal_error("Parameter count mismatch");
ValueMap VMap;
if (Count == 0)
return VMap;
LLVMValueRef SrcFirst = LLVMGetFirstParam(Src);
LLVMValueRef DstFirst = LLVMGetFirstParam(Dst);
LLVMValueRef SrcLast = LLVMGetLastParam(Src);
LLVMValueRef DstLast = LLVMGetLastParam(Dst);
LLVMValueRef SrcCur = SrcFirst;
LLVMValueRef DstCur = DstFirst;
LLVMValueRef SrcNext = nullptr;
LLVMValueRef DstNext = nullptr;
while (true) {
size_t NameLen;
const char *Name = LLVMGetValueName2(SrcCur, &NameLen);
LLVMSetValueName2(DstCur, Name, NameLen);
VMap[SrcCur] = DstCur;
Count--;
SrcNext = LLVMGetNextParam(SrcCur);
DstNext = LLVMGetNextParam(DstCur);
if (SrcNext == nullptr && DstNext == nullptr) {
if (SrcCur != SrcLast)
report_fatal_error("SrcLast param does not match End");
if (DstCur != DstLast)
report_fatal_error("DstLast param does not match End");
break;
}
if (SrcNext == nullptr)
report_fatal_error("SrcNext was unexpectedly null");
if (DstNext == nullptr)
report_fatal_error("DstNext was unexpectedly null");
LLVMValueRef SrcPrev = LLVMGetPreviousParam(SrcNext);
if (SrcPrev != SrcCur)
report_fatal_error("SrcNext.Previous param is not Current");
LLVMValueRef DstPrev = LLVMGetPreviousParam(DstNext);
if (DstPrev != DstCur)
report_fatal_error("DstNext.Previous param is not Current");
SrcCur = SrcNext;
DstCur = DstNext;
}
if (Count != 0)
report_fatal_error("Parameter count does not match iteration");
return VMap;
}
static void check_value_kind(LLVMValueRef V, LLVMValueKind K) {
if (LLVMGetValueKind(V) != K)
report_fatal_error("LLVMGetValueKind returned incorrect type");
}
static LLVMValueRef clone_constant_impl(LLVMValueRef Cst, LLVMModuleRef M);
static LLVMValueRef clone_constant(LLVMValueRef Cst, LLVMModuleRef M) {
LLVMValueRef Ret = clone_constant_impl(Cst, M);
check_value_kind(Ret, LLVMGetValueKind(Cst));
return Ret;
}
static LLVMValueRef clone_constant_impl(LLVMValueRef Cst, LLVMModuleRef M) {
if (!LLVMIsAConstant(Cst))
report_fatal_error("Expected a constant");
// Maybe it is a symbol
if (LLVMIsAGlobalValue(Cst)) {
size_t NameLen;
const char *Name = LLVMGetValueName2(Cst, &NameLen);
// Try function
if (LLVMIsAFunction(Cst)) {
check_value_kind(Cst, LLVMFunctionValueKind);
LLVMValueRef Dst = nullptr;
// Try an intrinsic
unsigned ID = LLVMGetIntrinsicID(Cst);
if (ID > 0 && !LLVMIntrinsicIsOverloaded(ID)) {
Dst = LLVMGetIntrinsicDeclaration(M, ID, nullptr, 0);
} else {
// Try a normal function
Dst = LLVMGetNamedFunction(M, Name);
}
if (Dst)
return Dst;
report_fatal_error("Could not find function");
}
// Try global variable
if (LLVMIsAGlobalVariable(Cst)) {
check_value_kind(Cst, LLVMGlobalVariableValueKind);
LLVMValueRef Dst = LLVMGetNamedGlobal(M, Name);
if (Dst)
return Dst;
report_fatal_error("Could not find variable");
}
// Try global alias
if (LLVMIsAGlobalAlias(Cst)) {
check_value_kind(Cst, LLVMGlobalAliasValueKind);
LLVMValueRef Dst = LLVMGetNamedGlobalAlias(M, Name, NameLen);
if (Dst)
return Dst;
report_fatal_error("Could not find alias");
}
fprintf(stderr, "Could not find @%s\n", Name);
exit(-1);
}
// Try integer literal
if (LLVMIsAConstantInt(Cst)) {
check_value_kind(Cst, LLVMConstantIntValueKind);
return LLVMConstInt(TypeCloner(M).Clone(Cst),
LLVMConstIntGetZExtValue(Cst), false);
}
// Try zeroinitializer
if (LLVMIsAConstantAggregateZero(Cst)) {
check_value_kind(Cst, LLVMConstantAggregateZeroValueKind);
return LLVMConstNull(TypeCloner(M).Clone(Cst));
}
// Try constant array
if (LLVMIsAConstantArray(Cst)) {
check_value_kind(Cst, LLVMConstantArrayValueKind);
LLVMTypeRef Ty = TypeCloner(M).Clone(Cst);
unsigned EltCount = LLVMGetArrayLength(Ty);
SmallVector<LLVMValueRef, 8> Elts;
for (unsigned i = 0; i < EltCount; i++)
Elts.push_back(clone_constant(LLVMGetOperand(Cst, i), M));
return LLVMConstArray(LLVMGetElementType(Ty), Elts.data(), EltCount);
}
// Try contant data array
if (LLVMIsAConstantDataArray(Cst)) {
check_value_kind(Cst, LLVMConstantDataArrayValueKind);
LLVMTypeRef Ty = TypeCloner(M).Clone(Cst);
unsigned EltCount = LLVMGetArrayLength(Ty);
SmallVector<LLVMValueRef, 8> Elts;
for (unsigned i = 0; i < EltCount; i++)
Elts.push_back(clone_constant(LLVMGetElementAsConstant(Cst, i), M));
return LLVMConstArray(LLVMGetElementType(Ty), Elts.data(), EltCount);
}
// Try constant struct
if (LLVMIsAConstantStruct(Cst)) {
check_value_kind(Cst, LLVMConstantStructValueKind);
LLVMTypeRef Ty = TypeCloner(M).Clone(Cst);
unsigned EltCount = LLVMCountStructElementTypes(Ty);
SmallVector<LLVMValueRef, 8> Elts;
for (unsigned i = 0; i < EltCount; i++)
Elts.push_back(clone_constant(LLVMGetOperand(Cst, i), M));
if (LLVMGetStructName(Ty))
return LLVMConstNamedStruct(Ty, Elts.data(), EltCount);
return LLVMConstStructInContext(LLVMGetModuleContext(M), Elts.data(),
EltCount, LLVMIsPackedStruct(Ty));
}
// Try undef
if (LLVMIsUndef(Cst)) {
check_value_kind(Cst, LLVMUndefValueValueKind);
return LLVMGetUndef(TypeCloner(M).Clone(Cst));
}
// Try null
if (LLVMIsNull(Cst)) {
check_value_kind(Cst, LLVMConstantTokenNoneValueKind);
LLVMTypeRef Ty = TypeCloner(M).Clone(Cst);
return LLVMConstNull(Ty);
}
// Try float literal
if (LLVMIsAConstantFP(Cst)) {
check_value_kind(Cst, LLVMConstantFPValueKind);
report_fatal_error("ConstantFP is not supported");
}
// This kind of constant is not supported
if (!LLVMIsAConstantExpr(Cst))
report_fatal_error("Expected a constant expression");
// At this point, it must be a constant expression
check_value_kind(Cst, LLVMConstantExprValueKind);
LLVMOpcode Op = LLVMGetConstOpcode(Cst);
switch(Op) {
case LLVMBitCast:
return LLVMConstBitCast(clone_constant(LLVMGetOperand(Cst, 0), M),
TypeCloner(M).Clone(Cst));
default:
fprintf(stderr, "%d is not a supported opcode\n", Op);
exit(-1);
}
}
struct FunCloner {
LLVMValueRef Fun;
LLVMModuleRef M;
ValueMap VMap;
BasicBlockMap BBMap;
FunCloner(LLVMValueRef Src, LLVMValueRef Dst): Fun(Dst),
M(LLVMGetGlobalParent(Fun)), VMap(clone_params(Src, Dst)) {}
LLVMTypeRef CloneType(LLVMTypeRef Src) {
return TypeCloner(M).Clone(Src);
}
LLVMTypeRef CloneType(LLVMValueRef Src) {
return TypeCloner(M).Clone(Src);
}
// Try to clone everything in the llvm::Value hierarchy.
LLVMValueRef CloneValue(LLVMValueRef Src) {
// First, the value may be constant.
if (LLVMIsAConstant(Src))
return clone_constant(Src, M);
// Function argument should always be in the map already.
auto i = VMap.find(Src);
if (i != VMap.end())
return i->second;
if (!LLVMIsAInstruction(Src))
report_fatal_error("Expected an instruction");
auto Ctx = LLVMGetModuleContext(M);
auto Builder = LLVMCreateBuilderInContext(Ctx);
auto BB = DeclareBB(LLVMGetInstructionParent(Src));
LLVMPositionBuilderAtEnd(Builder, BB);
auto Dst = CloneInstruction(Src, Builder);
LLVMDisposeBuilder(Builder);
return Dst;
}
void CloneAttrs(LLVMValueRef Src, LLVMValueRef Dst) {
auto Ctx = LLVMGetModuleContext(M);
int ArgCount = LLVMGetNumArgOperands(Src);
for (int i = LLVMAttributeReturnIndex; i <= ArgCount; i++) {
for (unsigned k = 0, e = LLVMGetLastEnumAttributeKind(); k < e; ++k) {
if (auto SrcA = LLVMGetCallSiteEnumAttribute(Src, i, k)) {
auto Val = LLVMGetEnumAttributeValue(SrcA);
auto A = LLVMCreateEnumAttribute(Ctx, k, Val);
LLVMAddCallSiteAttribute(Dst, i, A);
}
}
}
}
LLVMValueRef CloneInstruction(LLVMValueRef Src, LLVMBuilderRef Builder) {
check_value_kind(Src, LLVMInstructionValueKind);
if (!LLVMIsAInstruction(Src))
report_fatal_error("Expected an instruction");
size_t NameLen;
const char *Name = LLVMGetValueName2(Src, &NameLen);
// Check if this is something we already computed.
{
auto i = VMap.find(Src);
if (i != VMap.end()) {
// If we have a hit, it means we already generated the instruction
// as a dependancy to somethign else. We need to make sure
// it is ordered properly.
auto I = i->second;
LLVMInstructionRemoveFromParent(I);
LLVMInsertIntoBuilderWithName(Builder, I, Name);
return I;
}
}
// We tried everything, it must be an instruction
// that hasn't been generated already.
LLVMValueRef Dst = nullptr;
LLVMOpcode Op = LLVMGetInstructionOpcode(Src);
switch(Op) {
case LLVMRet: {
int OpCount = LLVMGetNumOperands(Src);
if (OpCount == 0)
Dst = LLVMBuildRetVoid(Builder);
else
Dst = LLVMBuildRet(Builder, CloneValue(LLVMGetOperand(Src, 0)));
break;
}
case LLVMBr: {
if (!LLVMIsConditional(Src)) {
LLVMValueRef SrcOp = LLVMGetOperand(Src, 0);
LLVMBasicBlockRef SrcBB = LLVMValueAsBasicBlock(SrcOp);
Dst = LLVMBuildBr(Builder, DeclareBB(SrcBB));
break;
}
LLVMValueRef Cond = LLVMGetCondition(Src);
LLVMValueRef Else = LLVMGetOperand(Src, 1);
LLVMBasicBlockRef ElseBB = DeclareBB(LLVMValueAsBasicBlock(Else));
LLVMValueRef Then = LLVMGetOperand(Src, 2);
LLVMBasicBlockRef ThenBB = DeclareBB(LLVMValueAsBasicBlock(Then));
Dst = LLVMBuildCondBr(Builder, CloneValue(Cond), ThenBB, ElseBB);
break;
}
case LLVMSwitch:
case LLVMIndirectBr:
break;
case LLVMInvoke: {
SmallVector<LLVMValueRef, 8> Args;
int ArgCount = LLVMGetNumArgOperands(Src);
for (int i = 0; i < ArgCount; i++)
Args.push_back(CloneValue(LLVMGetOperand(Src, i)));
LLVMValueRef Fn = CloneValue(LLVMGetCalledValue(Src));
LLVMBasicBlockRef Then = DeclareBB(LLVMGetNormalDest(Src));
LLVMBasicBlockRef Unwind = DeclareBB(LLVMGetUnwindDest(Src));
Dst = LLVMBuildInvoke(Builder, Fn, Args.data(), ArgCount,
Then, Unwind, Name);
CloneAttrs(Src, Dst);
break;
}
case LLVMUnreachable:
Dst = LLVMBuildUnreachable(Builder);
break;
case LLVMAdd: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildAdd(Builder, LHS, RHS, Name);
break;
}
case LLVMSub: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildSub(Builder, LHS, RHS, Name);
break;
}
case LLVMMul: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildMul(Builder, LHS, RHS, Name);
break;
}
case LLVMUDiv: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildUDiv(Builder, LHS, RHS, Name);
break;
}
case LLVMSDiv: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildSDiv(Builder, LHS, RHS, Name);
break;
}
case LLVMURem: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildURem(Builder, LHS, RHS, Name);
break;
}
case LLVMSRem: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildSRem(Builder, LHS, RHS, Name);
break;
}
case LLVMShl: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildShl(Builder, LHS, RHS, Name);
break;
}
case LLVMLShr: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildLShr(Builder, LHS, RHS, Name);
break;
}
case LLVMAShr: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildAShr(Builder, LHS, RHS, Name);
break;
}
case LLVMAnd: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildAnd(Builder, LHS, RHS, Name);
break;
}
case LLVMOr: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildOr(Builder, LHS, RHS, Name);
break;
}
case LLVMXor: {
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildXor(Builder, LHS, RHS, Name);
break;
}
case LLVMAlloca: {
LLVMTypeRef Ty = CloneType(LLVMGetAllocatedType(Src));
Dst = LLVMBuildAlloca(Builder, Ty, Name);
break;
}
case LLVMLoad: {
LLVMValueRef Ptr = CloneValue(LLVMGetOperand(Src, 0));
Dst = LLVMBuildLoad(Builder, Ptr, Name);
LLVMSetAlignment(Dst, LLVMGetAlignment(Src));
break;
}
case LLVMStore: {
LLVMValueRef Val = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef Ptr = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildStore(Builder, Val, Ptr);
LLVMSetAlignment(Dst, LLVMGetAlignment(Src));
break;
}
case LLVMGetElementPtr: {
LLVMValueRef Ptr = CloneValue(LLVMGetOperand(Src, 0));
SmallVector<LLVMValueRef, 8> Idx;
int NumIdx = LLVMGetNumIndices(Src);
for (int i = 1; i <= NumIdx; i++)
Idx.push_back(CloneValue(LLVMGetOperand(Src, i)));
if (LLVMIsInBounds(Src))
Dst = LLVMBuildInBoundsGEP(Builder, Ptr, Idx.data(), NumIdx, Name);
else
Dst = LLVMBuildGEP(Builder, Ptr, Idx.data(), NumIdx, Name);
break;
}
case LLVMAtomicCmpXchg: {
LLVMValueRef Ptr = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef Cmp = CloneValue(LLVMGetOperand(Src, 1));
LLVMValueRef New = CloneValue(LLVMGetOperand(Src, 2));
LLVMAtomicOrdering Succ = LLVMGetCmpXchgSuccessOrdering(Src);
LLVMAtomicOrdering Fail = LLVMGetCmpXchgFailureOrdering(Src);
LLVMBool SingleThread = LLVMIsAtomicSingleThread(Src);
Dst = LLVMBuildAtomicCmpXchg(Builder, Ptr, Cmp, New, Succ, Fail,
SingleThread);
} break;
case LLVMBitCast: {
LLVMValueRef V = CloneValue(LLVMGetOperand(Src, 0));
Dst = LLVMBuildBitCast(Builder, V, CloneType(Src), Name);
break;
}
case LLVMICmp: {
LLVMIntPredicate Pred = LLVMGetICmpPredicate(Src);
LLVMValueRef LHS = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef RHS = CloneValue(LLVMGetOperand(Src, 1));
Dst = LLVMBuildICmp(Builder, Pred, LHS, RHS, Name);
break;
}
case LLVMPHI: {
// We need to aggressively set things here because of loops.
VMap[Src] = Dst = LLVMBuildPhi(Builder, CloneType(Src), Name);
SmallVector<LLVMValueRef, 8> Values;
SmallVector<LLVMBasicBlockRef, 8> Blocks;
unsigned IncomingCount = LLVMCountIncoming(Src);
for (unsigned i = 0; i < IncomingCount; ++i) {
Blocks.push_back(DeclareBB(LLVMGetIncomingBlock(Src, i)));
Values.push_back(CloneValue(LLVMGetIncomingValue(Src, i)));
}
LLVMAddIncoming(Dst, Values.data(), Blocks.data(), IncomingCount);
return Dst;
}
case LLVMCall: {
SmallVector<LLVMValueRef, 8> Args;
int ArgCount = LLVMGetNumArgOperands(Src);
for (int i = 0; i < ArgCount; i++)
Args.push_back(CloneValue(LLVMGetOperand(Src, i)));
LLVMValueRef Fn = CloneValue(LLVMGetCalledValue(Src));
Dst = LLVMBuildCall(Builder, Fn, Args.data(), ArgCount, Name);
LLVMSetTailCall(Dst, LLVMIsTailCall(Src));
CloneAttrs(Src, Dst);
break;
}
case LLVMResume: {
Dst = LLVMBuildResume(Builder, CloneValue(LLVMGetOperand(Src, 0)));
break;
}
case LLVMLandingPad: {
// The landing pad API is a bit screwed up for historical reasons.
Dst = LLVMBuildLandingPad(Builder, CloneType(Src), nullptr, 0, Name);
unsigned NumClauses = LLVMGetNumClauses(Src);
for (unsigned i = 0; i < NumClauses; ++i)
LLVMAddClause(Dst, CloneValue(LLVMGetClause(Src, i)));
LLVMSetCleanup(Dst, LLVMIsCleanup(Src));
break;
}
case LLVMCleanupRet: {
LLVMValueRef CatchPad = CloneValue(LLVMGetOperand(Src, 0));
LLVMBasicBlockRef Unwind = nullptr;
if (LLVMBasicBlockRef UDest = LLVMGetUnwindDest(Src))
Unwind = DeclareBB(UDest);
Dst = LLVMBuildCleanupRet(Builder, CatchPad, Unwind);
break;
}
case LLVMCatchRet: {
LLVMValueRef CatchPad = CloneValue(LLVMGetOperand(Src, 0));
LLVMBasicBlockRef SuccBB = DeclareBB(LLVMGetSuccessor(Src, 0));
Dst = LLVMBuildCatchRet(Builder, CatchPad, SuccBB);
break;
}
case LLVMCatchPad: {
LLVMValueRef ParentPad = CloneValue(LLVMGetParentCatchSwitch(Src));
SmallVector<LLVMValueRef, 8> Args;
int ArgCount = LLVMGetNumArgOperands(Src);
for (int i = 0; i < ArgCount; i++)
Args.push_back(CloneValue(LLVMGetOperand(Src, i)));
Dst = LLVMBuildCatchPad(Builder, ParentPad,
Args.data(), ArgCount, Name);
break;
}
case LLVMCleanupPad: {
LLVMValueRef ParentPad = CloneValue(LLVMGetOperand(Src, 0));
SmallVector<LLVMValueRef, 8> Args;
int ArgCount = LLVMGetNumArgOperands(Src);
for (int i = 0; i < ArgCount; i++)
Args.push_back(CloneValue(LLVMGetArgOperand(Src, i)));
Dst = LLVMBuildCleanupPad(Builder, ParentPad,
Args.data(), ArgCount, Name);
break;
}
case LLVMCatchSwitch: {
LLVMValueRef ParentPad = CloneValue(LLVMGetOperand(Src, 0));
LLVMBasicBlockRef UnwindBB = nullptr;
if (LLVMBasicBlockRef UDest = LLVMGetUnwindDest(Src)) {
UnwindBB = DeclareBB(UDest);
}
unsigned NumHandlers = LLVMGetNumHandlers(Src);
Dst = LLVMBuildCatchSwitch(Builder, ParentPad, UnwindBB, NumHandlers, Name);
if (NumHandlers > 0) {
LLVMBasicBlockRef *Handlers = static_cast<LLVMBasicBlockRef*>(
safe_malloc(NumHandlers * sizeof(LLVMBasicBlockRef)));
LLVMGetHandlers(Src, Handlers);
for (unsigned i = 0; i < NumHandlers; i++)
LLVMAddHandler(Dst, DeclareBB(Handlers[i]));
free(Handlers);
}
break;
}
case LLVMExtractValue: {
LLVMValueRef Agg = CloneValue(LLVMGetOperand(Src, 0));
if (LLVMGetNumIndices(Src) != 1)
report_fatal_error("Expected only one indice");
auto I = LLVMGetIndices(Src)[0];
Dst = LLVMBuildExtractValue(Builder, Agg, I, Name);
break;
}
case LLVMInsertValue: {
LLVMValueRef Agg = CloneValue(LLVMGetOperand(Src, 0));
LLVMValueRef V = CloneValue(LLVMGetOperand(Src, 1));
if (LLVMGetNumIndices(Src) != 1)
report_fatal_error("Expected only one indice");
auto I = LLVMGetIndices(Src)[0];
Dst = LLVMBuildInsertValue(Builder, Agg, V, I, Name);
break;
}
default:
break;
}
if (Dst == nullptr) {
fprintf(stderr, "%d is not a supported opcode\n", Op);
exit(-1);
}
auto Ctx = LLVMGetModuleContext(M);
size_t NumMetadataEntries;
auto *AllMetadata =
LLVMInstructionGetAllMetadataOtherThanDebugLoc(Src,
&NumMetadataEntries);
for (unsigned i = 0; i < NumMetadataEntries; ++i) {
unsigned Kind = LLVMValueMetadataEntriesGetKind(AllMetadata, i);
LLVMMetadataRef MD = LLVMValueMetadataEntriesGetMetadata(AllMetadata, i);
LLVMSetMetadata(Dst, Kind, LLVMMetadataAsValue(Ctx, MD));
}
LLVMDisposeValueMetadataEntries(AllMetadata);
LLVMSetInstDebugLocation(Builder, Dst);
check_value_kind(Dst, LLVMInstructionValueKind);
return VMap[Src] = Dst;
}
LLVMBasicBlockRef DeclareBB(LLVMBasicBlockRef Src) {
// Check if this is something we already computed.
{
auto i = BBMap.find(Src);
if (i != BBMap.end()) {
return i->second;
}
}
LLVMValueRef V = LLVMBasicBlockAsValue(Src);
if (!LLVMValueIsBasicBlock(V) || LLVMValueAsBasicBlock(V) != Src)
report_fatal_error("Basic block is not a basic block");
const char *Name = LLVMGetBasicBlockName(Src);
size_t NameLen;
const char *VName = LLVMGetValueName2(V, &NameLen);
if (Name != VName)
report_fatal_error("Basic block name mismatch");
LLVMBasicBlockRef BB = LLVMAppendBasicBlock(Fun, Name);
return BBMap[Src] = BB;
}
LLVMBasicBlockRef CloneBB(LLVMBasicBlockRef Src) {
LLVMBasicBlockRef BB = DeclareBB(Src);
// Make sure ordering is correct.
LLVMBasicBlockRef Prev = LLVMGetPreviousBasicBlock(Src);
if (Prev)
LLVMMoveBasicBlockAfter(BB, DeclareBB(Prev));
LLVMValueRef First = LLVMGetFirstInstruction(Src);
LLVMValueRef Last = LLVMGetLastInstruction(Src);
if (First == nullptr) {
if (Last != nullptr)
report_fatal_error("Has no first instruction, but last one");
return BB;
}
auto Ctx = LLVMGetModuleContext(M);
LLVMBuilderRef Builder = LLVMCreateBuilderInContext(Ctx);
LLVMPositionBuilderAtEnd(Builder, BB);
LLVMValueRef Cur = First;
LLVMValueRef Next = nullptr;
while(true) {
CloneInstruction(Cur, Builder);
Next = LLVMGetNextInstruction(Cur);
if (Next == nullptr) {
if (Cur != Last)
report_fatal_error("Final instruction does not match Last");
break;
}
LLVMValueRef Prev = LLVMGetPreviousInstruction(Next);
if (Prev != Cur)
report_fatal_error("Next.Previous instruction is not Current");
Cur = Next;
}
LLVMDisposeBuilder(Builder);
return BB;
}
void CloneBBs(LLVMValueRef Src) {
unsigned Count = LLVMCountBasicBlocks(Src);
if (Count == 0)
return;
LLVMBasicBlockRef First = LLVMGetFirstBasicBlock(Src);
LLVMBasicBlockRef Last = LLVMGetLastBasicBlock(Src);
LLVMBasicBlockRef Cur = First;
LLVMBasicBlockRef Next = nullptr;
while(true) {
CloneBB(Cur);
Count--;
Next = LLVMGetNextBasicBlock(Cur);
if (Next == nullptr) {
if (Cur != Last)
report_fatal_error("Final basic block does not match Last");
break;
}
LLVMBasicBlockRef Prev = LLVMGetPreviousBasicBlock(Next);
if (Prev != Cur)
report_fatal_error("Next.Previous basic bloc is not Current");
Cur = Next;
}
if (Count != 0)
report_fatal_error("Basic block count does not match iterration");
}
};
static void declare_symbols(LLVMModuleRef Src, LLVMModuleRef M) {
auto Ctx = LLVMGetModuleContext(M);
LLVMValueRef Begin = LLVMGetFirstGlobal(Src);
LLVMValueRef End = LLVMGetLastGlobal(Src);
LLVMValueRef Cur = Begin;
LLVMValueRef Next = nullptr;
if (!Begin) {
if (End != nullptr)
report_fatal_error("Range has an end but no beginning");
goto FunDecl;
}
while (true) {
size_t NameLen;
const char *Name = LLVMGetValueName2(Cur, &NameLen);
if (LLVMGetNamedGlobal(M, Name))
report_fatal_error("GlobalVariable already cloned");
LLVMAddGlobal(M, LLVMGetElementType(TypeCloner(M).Clone(Cur)), Name);
Next = LLVMGetNextGlobal(Cur);
if (Next == nullptr) {
if (Cur != End)
report_fatal_error("");
break;
}
LLVMValueRef Prev = LLVMGetPreviousGlobal(Next);
if (Prev != Cur)
report_fatal_error("Next.Previous global is not Current");
Cur = Next;
}
FunDecl:
Begin = LLVMGetFirstFunction(Src);
End = LLVMGetLastFunction(Src);
if (!Begin) {
if (End != nullptr)
report_fatal_error("Range has an end but no beginning");
goto AliasDecl;
}
Cur = Begin;
Next = nullptr;
while (true) {
size_t NameLen;
const char *Name = LLVMGetValueName2(Cur, &NameLen);
if (LLVMGetNamedFunction(M, Name))
report_fatal_error("Function already cloned");
auto Ty = LLVMGetElementType(TypeCloner(M).Clone(Cur));
auto F = LLVMAddFunction(M, Name, Ty);
// Copy attributes
for (int i = LLVMAttributeFunctionIndex, c = LLVMCountParams(F);
i <= c; ++i) {
for (unsigned k = 0, e = LLVMGetLastEnumAttributeKind(); k < e; ++k) {
if (auto SrcA = LLVMGetEnumAttributeAtIndex(Cur, i, k)) {
auto Val = LLVMGetEnumAttributeValue(SrcA);
auto DstA = LLVMCreateEnumAttribute(Ctx, k, Val);
LLVMAddAttributeAtIndex(F, i, DstA);
}
}
}
Next = LLVMGetNextFunction(Cur);
if (Next == nullptr) {
if (Cur != End)
report_fatal_error("Last function does not match End");
break;
}
LLVMValueRef Prev = LLVMGetPreviousFunction(Next);
if (Prev != Cur)
report_fatal_error("Next.Previous function is not Current");
Cur = Next;
}
AliasDecl:
Begin = LLVMGetFirstGlobalAlias(Src);
End = LLVMGetLastGlobalAlias(Src);
if (!Begin) {
if (End != nullptr)
report_fatal_error("Range has an end but no beginning");
goto NamedMDDecl;
}
Cur = Begin;
Next = nullptr;
while (true) {
size_t NameLen;
const char *Name = LLVMGetValueName2(Cur, &NameLen);
if (LLVMGetNamedGlobalAlias(M, Name, NameLen))
report_fatal_error("Global alias already cloned");
LLVMTypeRef CurType = TypeCloner(M).Clone(Cur);
// FIXME: Allow NULL aliasee.
LLVMAddAlias(M, CurType, LLVMGetUndef(CurType), Name);
Next = LLVMGetNextGlobalAlias(Cur);
if (Next == nullptr) {
if (Cur != End)
report_fatal_error("");
break;
}
LLVMValueRef Prev = LLVMGetPreviousGlobalAlias(Next);
if (Prev != Cur)
report_fatal_error("Next.Previous global is not Current");
Cur = Next;
}
NamedMDDecl:
LLVMNamedMDNodeRef BeginMD = LLVMGetFirstNamedMetadata(Src);
LLVMNamedMDNodeRef EndMD = LLVMGetLastNamedMetadata(Src);
if (!BeginMD) {
if (EndMD != nullptr)
report_fatal_error("Range has an end but no beginning");
return;
}
LLVMNamedMDNodeRef CurMD = BeginMD;
LLVMNamedMDNodeRef NextMD = nullptr;
while (true) {
size_t NameLen;
const char *Name = LLVMGetNamedMetadataName(CurMD, &NameLen);
if (LLVMGetNamedMetadata(M, Name, NameLen))
report_fatal_error("Named Metadata Node already cloned");
LLVMGetOrInsertNamedMetadata(M, Name, NameLen);
NextMD = LLVMGetNextNamedMetadata(CurMD);
if (NextMD == nullptr) {
if (CurMD != EndMD)
report_fatal_error("");
break;
}
LLVMNamedMDNodeRef PrevMD = LLVMGetPreviousNamedMetadata(NextMD);
if (PrevMD != CurMD)
report_fatal_error("Next.Previous global is not Current");
CurMD = NextMD;
}