-
Notifications
You must be signed in to change notification settings - Fork 718
/
Copy pathHLOperationLower.cpp
9263 lines (8414 loc) · 370 KB
/
HLOperationLower.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
///////////////////////////////////////////////////////////////////////////////
// //
// HLOperationLower.cpp //
// Copyright (C) Microsoft Corporation. All rights reserved. //
// This file is distributed under the University of Illinois Open Source //
// License. See LICENSE.TXT for details. //
// //
// Lower functions to lower HL operations to DXIL operations. //
// //
///////////////////////////////////////////////////////////////////////////////
#define _USE_MATH_DEFINES
#include <array>
#include <cmath>
#include <functional>
#include <unordered_set>
#include "dxc/DXIL/DxilModule.h"
#include "dxc/DXIL/DxilOperations.h"
#include "dxc/DXIL/DxilResourceProperties.h"
#include "dxc/DXIL/DxilUtil.h"
#include "dxc/HLSL/DxilPoisonValues.h"
#include "dxc/HLSL/HLLowerUDT.h"
#include "dxc/HLSL/HLMatrixLowerHelper.h"
#include "dxc/HLSL/HLMatrixType.h"
#include "dxc/HLSL/HLModule.h"
#include "dxc/HLSL/HLOperationLower.h"
#include "dxc/HLSL/HLOperationLowerExtension.h"
#include "dxc/HLSL/HLOperations.h"
#include "dxc/HlslIntrinsicOp.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
using namespace llvm;
using namespace hlsl;
struct HLOperationLowerHelper {
HLModule &M;
OP &hlslOP;
Type *voidTy;
Type *f32Ty;
Type *i32Ty;
Type *i16Ty;
llvm::Type *i1Ty;
Type *i8Ty;
DxilTypeSystem &dxilTypeSys;
DxilFunctionProps *functionProps;
DataLayout dataLayout;
SmallDenseMap<Type *, Type *, 4> loweredTypes;
HLOperationLowerHelper(HLModule &HLM);
};
HLOperationLowerHelper::HLOperationLowerHelper(HLModule &HLM)
: M(HLM), hlslOP(*HLM.GetOP()), dxilTypeSys(HLM.GetTypeSystem()),
dataLayout(DataLayout(HLM.GetHLOptions().bUseMinPrecision
? hlsl::DXIL::kLegacyLayoutString
: hlsl::DXIL::kNewLayoutString)) {
llvm::LLVMContext &Ctx = HLM.GetCtx();
voidTy = Type::getVoidTy(Ctx);
f32Ty = Type::getFloatTy(Ctx);
i32Ty = Type::getInt32Ty(Ctx);
i16Ty = Type::getInt16Ty(Ctx);
i1Ty = Type::getInt1Ty(Ctx);
i8Ty = Type::getInt8Ty(Ctx);
Function *EntryFunc = HLM.GetEntryFunction();
functionProps = nullptr;
if (HLM.HasDxilFunctionProps(EntryFunc))
functionProps = &HLM.GetDxilFunctionProps(EntryFunc);
}
struct HLObjectOperationLowerHelper {
private:
// For object intrinsics.
HLModule &HLM;
struct ResAttribute {
DXIL::ResourceClass RC;
DXIL::ResourceKind RK;
Type *ResourceType;
};
std::unordered_map<Value *, ResAttribute> HandleMetaMap;
std::unordered_set<Instruction *> &UpdateCounterSet;
// Map from pointer of cbuffer to pointer of resource.
// For cbuffer like this:
// cbuffer A {
// Texture2D T;
// };
// A global resource Texture2D T2 will be created for Texture2D T.
// CBPtrToResourceMap[T] will return T2.
std::unordered_map<Value *, Value *> CBPtrToResourceMap;
public:
HLObjectOperationLowerHelper(HLModule &HLM,
std::unordered_set<Instruction *> &UpdateCounter)
: HLM(HLM), UpdateCounterSet(UpdateCounter) {}
DXIL::ResourceClass GetRC(Value *Handle) {
ResAttribute &Res = FindCreateHandleResourceBase(Handle);
return Res.RC;
}
DXIL::ResourceKind GetRK(Value *Handle) {
ResAttribute &Res = FindCreateHandleResourceBase(Handle);
return Res.RK;
}
Type *GetResourceType(Value *Handle) {
ResAttribute &Res = FindCreateHandleResourceBase(Handle);
return Res.ResourceType;
}
void MarkHasCounter(Value *handle, Type *i8Ty) {
CallInst *CIHandle = cast<CallInst>(handle);
DXASSERT(hlsl::GetHLOpcodeGroup(CIHandle->getCalledFunction()) ==
HLOpcodeGroup::HLAnnotateHandle,
"else invalid handle");
// Mark has counter for the input handle.
Value *counterHandle =
CIHandle->getArgOperand(HLOperandIndex::kHandleOpIdx);
// Change kind into StructurBufferWithCounter.
Constant *Props = cast<Constant>(CIHandle->getArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx));
DxilResourceProperties RP = resource_helper::loadPropsFromConstant(*Props);
RP.Basic.SamplerCmpOrHasCounter = true;
CIHandle->setArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx,
resource_helper::getAsConstant(RP,
HLM.GetOP()->GetResourcePropertiesType(),
*HLM.GetShaderModel()));
DXIL::ResourceClass RC = GetRC(handle);
DXASSERT_LOCALVAR(RC, RC == DXIL::ResourceClass::UAV,
"must UAV for counter");
std::unordered_set<Value *> resSet;
MarkHasCounterOnCreateHandle(counterHandle, resSet);
}
DxilResourceBase *FindCBufferResourceFromHandle(Value *handle) {
if (CallInst *CI = dyn_cast<CallInst>(handle)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroupByName(CI->getCalledFunction());
if (group == HLOpcodeGroup::HLAnnotateHandle) {
handle = CI->getArgOperand(HLOperandIndex::kHandleOpIdx);
}
}
Constant *symbol = nullptr;
if (CallInst *CI = dyn_cast<CallInst>(handle)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroupByName(CI->getCalledFunction());
if (group == HLOpcodeGroup::HLCreateHandle) {
symbol = dyn_cast<Constant>(
CI->getArgOperand(HLOperandIndex::kCreateHandleResourceOpIdx));
}
}
if (!symbol)
return nullptr;
for (const std::unique_ptr<DxilCBuffer> &res : HLM.GetCBuffers()) {
if (res->GetGlobalSymbol() == symbol)
return res.get();
}
return nullptr;
}
Value *GetOrCreateResourceForCbPtr(GetElementPtrInst *CbPtr,
GlobalVariable *CbGV,
DxilResourceProperties &RP) {
// Change array idx to 0 to make sure all array ptr share same key.
Value *Key = UniformCbPtr(CbPtr, CbGV);
if (CBPtrToResourceMap.count(Key))
return CBPtrToResourceMap[Key];
Value *Resource = CreateResourceForCbPtr(CbPtr, CbGV, RP);
CBPtrToResourceMap[Key] = Resource;
return Resource;
}
Value *LowerCbResourcePtr(GetElementPtrInst *CbPtr, Value *ResPtr) {
// Simple case.
if (ResPtr->getType() == CbPtr->getType())
return ResPtr;
// Array case.
DXASSERT_NOMSG(ResPtr->getType()->getPointerElementType()->isArrayTy());
IRBuilder<> Builder(CbPtr);
gep_type_iterator GEPIt = gep_type_begin(CbPtr), E = gep_type_end(CbPtr);
Value *arrayIdx = GEPIt.getOperand();
// Only calc array idx and size.
// Ignore struct type part.
for (; GEPIt != E; ++GEPIt) {
if (GEPIt->isArrayTy()) {
arrayIdx = Builder.CreateMul(
arrayIdx, Builder.getInt32(GEPIt->getArrayNumElements()));
arrayIdx = Builder.CreateAdd(arrayIdx, GEPIt.getOperand());
}
}
return Builder.CreateGEP(ResPtr, {Builder.getInt32(0), arrayIdx});
}
DxilResourceProperties GetResPropsFromAnnotateHandle(CallInst *Anno) {
Constant *Props = cast<Constant>(Anno->getArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx));
DxilResourceProperties RP = resource_helper::loadPropsFromConstant(*Props);
return RP;
}
private:
ResAttribute &FindCreateHandleResourceBase(Value *Handle) {
if (HandleMetaMap.count(Handle))
return HandleMetaMap[Handle];
// Add invalid first to avoid dead loop.
HandleMetaMap[Handle] = {
DXIL::ResourceClass::Invalid, DXIL::ResourceKind::Invalid,
StructType::get(Type::getVoidTy(HLM.GetCtx()), nullptr)};
if (CallInst *CI = dyn_cast<CallInst>(Handle)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroupByName(CI->getCalledFunction());
if (group == HLOpcodeGroup::HLAnnotateHandle) {
Constant *Props = cast<Constant>(CI->getArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx));
DxilResourceProperties RP =
resource_helper::loadPropsFromConstant(*Props);
Type *ResTy =
CI->getArgOperand(HLOperandIndex::kAnnotateHandleResourceTypeOpIdx)
->getType();
ResAttribute Attrib = {RP.getResourceClass(), RP.getResourceKind(),
ResTy};
HandleMetaMap[Handle] = Attrib;
return HandleMetaMap[Handle];
}
}
dxilutil::EmitErrorOnContext(Handle->getContext(),
"cannot map resource to handle.");
return HandleMetaMap[Handle];
}
CallInst *FindCreateHandle(Value *handle,
std::unordered_set<Value *> &resSet) {
// Already checked.
if (resSet.count(handle))
return nullptr;
resSet.insert(handle);
if (CallInst *CI = dyn_cast<CallInst>(handle))
return CI;
if (SelectInst *Sel = dyn_cast<SelectInst>(handle)) {
if (CallInst *CI = FindCreateHandle(Sel->getTrueValue(), resSet))
return CI;
if (CallInst *CI = FindCreateHandle(Sel->getFalseValue(), resSet))
return CI;
return nullptr;
}
if (PHINode *Phi = dyn_cast<PHINode>(handle)) {
for (unsigned i = 0; i < Phi->getNumOperands(); i++) {
if (CallInst *CI = FindCreateHandle(Phi->getOperand(i), resSet))
return CI;
}
return nullptr;
}
return nullptr;
}
void MarkHasCounterOnCreateHandle(Value *handle,
std::unordered_set<Value *> &resSet) {
// Already checked.
if (resSet.count(handle))
return;
resSet.insert(handle);
if (CallInst *CI = dyn_cast<CallInst>(handle)) {
Value *Res =
CI->getArgOperand(HLOperandIndex::kCreateHandleResourceOpIdx);
LoadInst *LdRes = dyn_cast<LoadInst>(Res);
if (LdRes) {
UpdateCounterSet.insert(LdRes);
return;
}
if (CallInst *CallRes = dyn_cast<CallInst>(Res)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroup(CallRes->getCalledFunction());
if (group == HLOpcodeGroup::HLCast) {
HLCastOpcode opcode =
static_cast<HLCastOpcode>(hlsl::GetHLOpcode(CallRes));
if (opcode == HLCastOpcode::HandleToResCast) {
if (Instruction *Hdl = dyn_cast<Instruction>(
CallRes->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx)))
UpdateCounterSet.insert(Hdl);
return;
}
}
}
dxilutil::EmitErrorOnInstruction(CI, "cannot map resource to handle.");
return;
}
if (SelectInst *Sel = dyn_cast<SelectInst>(handle)) {
MarkHasCounterOnCreateHandle(Sel->getTrueValue(), resSet);
MarkHasCounterOnCreateHandle(Sel->getFalseValue(), resSet);
}
if (PHINode *Phi = dyn_cast<PHINode>(handle)) {
for (unsigned i = 0; i < Phi->getNumOperands(); i++) {
MarkHasCounterOnCreateHandle(Phi->getOperand(i), resSet);
}
}
}
Value *UniformCbPtr(GetElementPtrInst *CbPtr, GlobalVariable *CbGV) {
gep_type_iterator GEPIt = gep_type_begin(CbPtr), E = gep_type_end(CbPtr);
std::vector<Value *> idxList(CbPtr->idx_begin(), CbPtr->idx_end());
unsigned i = 0;
IRBuilder<> Builder(HLM.GetCtx());
Value *zero = Builder.getInt32(0);
for (; GEPIt != E; ++GEPIt, ++i) {
ConstantInt *ImmIdx = dyn_cast<ConstantInt>(GEPIt.getOperand());
if (!ImmIdx) {
// Remove dynamic indexing to avoid crash.
idxList[i] = zero;
}
}
Value *Key = Builder.CreateInBoundsGEP(CbGV, idxList);
return Key;
}
Value *CreateResourceForCbPtr(GetElementPtrInst *CbPtr, GlobalVariable *CbGV,
DxilResourceProperties &RP) {
Type *CbTy = CbPtr->getPointerOperandType();
DXASSERT_LOCALVAR(CbTy, CbTy == CbGV->getType(),
"else arg not point to var");
gep_type_iterator GEPIt = gep_type_begin(CbPtr), E = gep_type_end(CbPtr);
unsigned i = 0;
IRBuilder<> Builder(HLM.GetCtx());
unsigned arraySize = 1;
DxilTypeSystem &typeSys = HLM.GetTypeSystem();
std::string Name;
for (; GEPIt != E; ++GEPIt, ++i) {
if (GEPIt->isArrayTy()) {
arraySize *= GEPIt->getArrayNumElements();
if (!Name.empty())
Name += ".";
if (ConstantInt *ImmIdx = dyn_cast<ConstantInt>(GEPIt.getOperand())) {
unsigned idx = ImmIdx->getLimitedValue();
Name += std::to_string(idx);
}
} else if (GEPIt->isStructTy()) {
DxilStructAnnotation *typeAnnot =
typeSys.GetStructAnnotation(cast<StructType>(*GEPIt));
DXASSERT_NOMSG(typeAnnot);
unsigned idx = cast<ConstantInt>(GEPIt.getOperand())->getLimitedValue();
DXASSERT_NOMSG(typeAnnot->GetNumFields() > idx);
DxilFieldAnnotation &fieldAnnot = typeAnnot->GetFieldAnnotation(idx);
if (!Name.empty())
Name += ".";
Name += fieldAnnot.GetFieldName();
}
}
Type *Ty = CbPtr->getResultElementType();
// Not support resource array in cbuffer.
unsigned ResBinding =
HLM.GetBindingForResourceInCB(CbPtr, CbGV, RP.getResourceClass());
return CreateResourceGV(Ty, Name, RP, ResBinding);
}
Value *CreateResourceGV(Type *Ty, StringRef Name, DxilResourceProperties &RP,
unsigned ResBinding) {
Module &M = *HLM.GetModule();
Constant *GV = M.getOrInsertGlobal(Name, Ty);
// Create resource and set GV as globalSym.
DxilResourceBase *Res = HLM.AddResourceWithGlobalVariableAndProps(GV, RP);
DXASSERT(Res, "fail to create resource for global variable in cbuffer");
Res->SetLowerBound(ResBinding);
return GV;
}
};
// Helper for lowering resource extension methods.
struct HLObjectExtensionLowerHelper : public hlsl::HLResourceLookup {
explicit HLObjectExtensionLowerHelper(HLObjectOperationLowerHelper &ObjHelper)
: m_ObjHelper(ObjHelper) {}
virtual bool GetResourceKindName(Value *HLHandle, const char **ppName) {
DXIL::ResourceKind K = m_ObjHelper.GetRK(HLHandle);
bool Success = K != DXIL::ResourceKind::Invalid;
if (Success) {
*ppName = hlsl::GetResourceKindName(K);
}
return Success;
}
private:
HLObjectOperationLowerHelper &m_ObjHelper;
};
using IntrinsicLowerFuncTy = Value *(CallInst *CI, IntrinsicOp IOP,
DXIL::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated);
struct IntrinsicLower {
// Intrinsic opcode.
IntrinsicOp IntriOpcode;
// Lower function.
IntrinsicLowerFuncTy &LowerFunc;
// DXIL opcode if can direct map.
DXIL::OpCode DxilOpcode;
};
// IOP intrinsics.
namespace {
Value *TrivialDxilOperation(Function *dxilFunc, OP::OpCode opcode,
ArrayRef<Value *> refArgs, Type *Ty, Type *RetTy,
OP *hlslOP, IRBuilder<> &Builder) {
unsigned argNum = refArgs.size();
std::vector<Value *> args = refArgs;
if (Ty->isVectorTy()) {
Value *retVal = llvm::UndefValue::get(RetTy);
unsigned vecSize = Ty->getVectorNumElements();
for (unsigned i = 0; i < vecSize; i++) {
// Update vector args, skip known opcode arg.
for (unsigned argIdx = HLOperandIndex::kUnaryOpSrc0Idx; argIdx < argNum;
argIdx++) {
if (refArgs[argIdx]->getType()->isVectorTy()) {
Value *arg = refArgs[argIdx];
args[argIdx] = Builder.CreateExtractElement(arg, i);
}
}
Value *EltOP =
Builder.CreateCall(dxilFunc, args, hlslOP->GetOpCodeName(opcode));
retVal = Builder.CreateInsertElement(retVal, EltOP, i);
}
return retVal;
} else {
if (!RetTy->isVoidTy()) {
Value *retVal =
Builder.CreateCall(dxilFunc, args, hlslOP->GetOpCodeName(opcode));
return retVal;
} else {
// Cannot add name to void.
return Builder.CreateCall(dxilFunc, args);
}
}
}
// Generates a DXIL operation over an overloaded type (Ty), returning a
// RetTy value; when Ty is a vector, it will replicate per-element operations
// into RetTy to rebuild it.
Value *TrivialDxilOperation(OP::OpCode opcode, ArrayRef<Value *> refArgs,
Type *Ty, Type *RetTy, OP *hlslOP,
IRBuilder<> &Builder) {
Type *EltTy = Ty->getScalarType();
Function *dxilFunc = hlslOP->GetOpFunc(opcode, EltTy);
return TrivialDxilOperation(dxilFunc, opcode, refArgs, Ty, RetTy, hlslOP,
Builder);
}
Value *TrivialDxilOperation(OP::OpCode opcode, ArrayRef<Value *> refArgs,
Type *Ty, Instruction *Inst, OP *hlslOP) {
DXASSERT(refArgs.size() > 0, "else opcode isn't in signature");
DXASSERT(refArgs[0] == nullptr,
"else caller has already filled the value in");
IRBuilder<> B(Inst);
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
const_cast<llvm::Value **>(refArgs.data())[0] =
opArg; // actually stack memory from caller
return TrivialDxilOperation(opcode, refArgs, Ty, Inst->getType(), hlslOP, B);
}
Value *TrivialDxilUnaryOperationRet(OP::OpCode opcode, Value *src, Type *RetTy,
hlsl::OP *hlslOP, IRBuilder<> &Builder) {
Type *Ty = src->getType();
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src};
return TrivialDxilOperation(opcode, args, Ty, RetTy, hlslOP, Builder);
}
Value *TrivialDxilUnaryOperation(OP::OpCode opcode, Value *src,
hlsl::OP *hlslOP, IRBuilder<> &Builder) {
return TrivialDxilUnaryOperationRet(opcode, src, src->getType(), hlslOP,
Builder);
}
Value *TrivialDxilBinaryOperation(OP::OpCode opcode, Value *src0, Value *src1,
hlsl::OP *hlslOP, IRBuilder<> &Builder) {
Type *Ty = src0->getType();
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src0, src1};
return TrivialDxilOperation(opcode, args, Ty, Ty, hlslOP, Builder);
}
Value *TrivialDxilTrinaryOperation(OP::OpCode opcode, Value *src0, Value *src1,
Value *src2, hlsl::OP *hlslOP,
IRBuilder<> &Builder) {
Type *Ty = src0->getType();
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src0, src1, src2};
return TrivialDxilOperation(opcode, args, Ty, Ty, hlslOP, Builder);
}
Value *TrivialUnaryOperation(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
Value *src0 = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
IRBuilder<> Builder(CI);
hlsl::OP *hlslOP = &helper.hlslOP;
Value *retVal = TrivialDxilUnaryOperationRet(opcode, src0, CI->getType(),
hlslOP, Builder);
return retVal;
}
Value *TrivialBinaryOperation(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *src0 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc0Idx);
Value *src1 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc1Idx);
IRBuilder<> Builder(CI);
Value *binOp =
TrivialDxilBinaryOperation(opcode, src0, src1, hlslOP, Builder);
return binOp;
}
Value *TrivialTrinaryOperation(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *src0 = CI->getArgOperand(HLOperandIndex::kTrinaryOpSrc0Idx);
Value *src1 = CI->getArgOperand(HLOperandIndex::kTrinaryOpSrc1Idx);
Value *src2 = CI->getArgOperand(HLOperandIndex::kTrinaryOpSrc2Idx);
IRBuilder<> Builder(CI);
Value *triOp =
TrivialDxilTrinaryOperation(opcode, src0, src1, src2, hlslOP, Builder);
return triOp;
}
Value *TrivialIsSpecialFloat(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *src = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
IRBuilder<> Builder(CI);
Type *Ty = src->getType();
Type *RetTy = Type::getInt1Ty(CI->getContext());
if (Ty->isVectorTy())
RetTy = VectorType::get(RetTy, Ty->getVectorNumElements());
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src};
return TrivialDxilOperation(opcode, args, Ty, RetTy, hlslOP, Builder);
}
bool IsResourceGEP(GetElementPtrInst *I) {
Type *Ty = I->getType()->getPointerElementType();
Ty = dxilutil::GetArrayEltTy(Ty);
// Only mark on GEP which point to resource.
return dxilutil::IsHLSLResourceType(Ty);
}
Value *TranslateNonUniformResourceIndex(
CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper, HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
Value *V = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
Type *hdlTy = helper.hlslOP.GetHandleType();
for (User *U : CI->users()) {
if (GetElementPtrInst *I = dyn_cast<GetElementPtrInst>(U)) {
// Only mark on GEP which point to resource.
if (IsResourceGEP(I))
DxilMDHelper::MarkNonUniform(I);
} else if (CastInst *castI = dyn_cast<CastInst>(U)) {
for (User *castU : castI->users()) {
if (GetElementPtrInst *I = dyn_cast<GetElementPtrInst>(castU)) {
// Only mark on GEP which point to resource.
if (IsResourceGEP(I))
DxilMDHelper::MarkNonUniform(I);
} else if (CallInst *CI = dyn_cast<CallInst>(castU)) {
if (CI->getType() == hdlTy)
DxilMDHelper::MarkNonUniform(CI);
}
}
} else if (CallInst *CI = dyn_cast<CallInst>(U)) {
if (CI->getType() == hdlTy)
DxilMDHelper::MarkNonUniform(CI);
}
}
CI->replaceAllUsesWith(V);
return nullptr;
}
Value *TrivialBarrier(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *OP = &helper.hlslOP;
Function *dxilFunc = OP->GetOpFunc(OP::OpCode::Barrier, CI->getType());
Constant *opArg = OP->GetU32Const((unsigned)OP::OpCode::Barrier);
unsigned uglobal = static_cast<unsigned>(DXIL::BarrierMode::UAVFenceGlobal);
unsigned g = static_cast<unsigned>(DXIL::BarrierMode::TGSMFence);
unsigned t = static_cast<unsigned>(DXIL::BarrierMode::SyncThreadGroup);
// unsigned ut =
// static_cast<unsigned>(DXIL::BarrierMode::UAVFenceThreadGroup);
unsigned barrierMode = 0;
switch (IOP) {
case IntrinsicOp::IOP_AllMemoryBarrier:
barrierMode = uglobal | g;
break;
case IntrinsicOp::IOP_AllMemoryBarrierWithGroupSync:
barrierMode = uglobal | g | t;
break;
case IntrinsicOp::IOP_GroupMemoryBarrier:
barrierMode = g;
break;
case IntrinsicOp::IOP_GroupMemoryBarrierWithGroupSync:
barrierMode = g | t;
break;
case IntrinsicOp::IOP_DeviceMemoryBarrier:
barrierMode = uglobal;
break;
case IntrinsicOp::IOP_DeviceMemoryBarrierWithGroupSync:
barrierMode = uglobal | t;
break;
default:
DXASSERT(0, "invalid opcode for barrier");
break;
}
Value *src0 = OP->GetU32Const(static_cast<unsigned>(barrierMode));
Value *args[] = {opArg, src0};
IRBuilder<> Builder(CI);
Builder.CreateCall(dxilFunc, args);
return nullptr;
}
Value *TranslateD3DColorToUByte4(CallInst *CI, IntrinsicOp IOP,
OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
IRBuilder<> Builder(CI);
Value *val = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
Type *Ty = val->getType();
// Use the same scaling factor used by FXC (i.e., 255.001953)
// Excerpt from stackoverflow discussion:
// "Built-in rounding, necessary because of truncation. 0.001953 * 256 = 0.5"
Constant *toByteConst = ConstantFP::get(Ty->getScalarType(), 255.001953);
if (Ty->isVectorTy()) {
static constexpr int supportedVecElemCount = 4;
if (Ty->getVectorNumElements() == supportedVecElemCount) {
toByteConst =
ConstantVector::getSplat(supportedVecElemCount, toByteConst);
// Swizzle the input val -> val.zyxw
std::vector<int> mask{2, 1, 0, 3};
val = Builder.CreateShuffleVector(val, val, mask);
} else {
llvm_unreachable(
"Unsupported input type for intrinsic D3DColorToUByte4.");
return UndefValue::get(CI->getType());
}
}
Value *byte4 = Builder.CreateFMul(toByteConst, val);
return Builder.CreateCast(Instruction::CastOps::FPToSI, byte4, CI->getType());
}
// Returns true if pow can be implemented using Fxc's mul-only code gen pattern.
// Fxc uses the below rules when choosing mul-only code gen pattern to implement
// pow function. Rule 1: Applicable only to power values in the range
// [INT32_MIN, INT32_MAX] Rule 2: The maximum number of mul ops needed shouldn't
// exceed (2n+1) or (n+1) based on whether the power
// is a positive or a negative value. Here "n" is the number of scalar
// elements in power.
// Rule 3: Power must be an exact value.
// +----------+---------------------+------------------+
// | BaseType | IsExponentPositive | MaxMulOpsAllowed |
// +----------+---------------------+------------------+
// | float4x4 | True | 33 |
// | float4x4 | False | 17 |
// | float4x2 | True | 17 |
// | float4x2 | False | 9 |
// | float2x4 | True | 17 |
// | float2x4 | False | 9 |
// | float4 | True | 9 |
// | float4 | False | 5 |
// | float2 | True | 5 |
// | float2 | False | 3 |
// | float | True | 3 |
// | float | False | 2 |
// +----------+---------------------+------------------+
bool CanUseFxcMulOnlyPatternForPow(IRBuilder<> &Builder, Value *x, Value *pow,
int32_t &powI) {
// Applicable only when power is a literal.
if (!isa<ConstantDataVector>(pow) && !isa<ConstantFP>(pow)) {
return false;
}
// Only apply this code gen on splat values.
if (ConstantDataVector *cdv = dyn_cast<ConstantDataVector>(pow)) {
if (!hlsl::dxilutil::IsSplat(cdv)) {
return false;
}
}
APFloat powAPF = isa<ConstantDataVector>(pow)
? cast<ConstantDataVector>(pow)->getElementAsAPFloat(0)
: // should be a splat value
cast<ConstantFP>(pow)->getValueAPF();
APSInt powAPS(32, false);
bool isExact = false;
// Try converting float value of power to integer and also check if the float
// value is exact.
APFloat::opStatus status =
powAPF.convertToInteger(powAPS, APFloat::rmTowardZero, &isExact);
if (status == APFloat::opStatus::opOK && isExact) {
powI = powAPS.getExtValue();
uint32_t powU = abs(powI);
int setBitCount = 0;
int maxBitSetPos = -1;
for (int i = 0; i < 32; i++) {
if ((powU >> i) & 1) {
setBitCount++;
maxBitSetPos = i;
}
}
DXASSERT(maxBitSetPos <= 30, "msb should always be zero.");
unsigned numElem =
isa<ConstantDataVector>(pow) ? x->getType()->getVectorNumElements() : 1;
int mulOpThreshold = powI < 0 ? numElem + 1 : 2 * numElem + 1;
int mulOpNeeded = maxBitSetPos + setBitCount - 1;
return mulOpNeeded <= mulOpThreshold;
}
return false;
}
Value *TranslatePowUsingFxcMulOnlyPattern(IRBuilder<> &Builder, Value *x,
const int32_t y) {
uint32_t absY = abs(y);
// If y is zero then always return 1.
if (absY == 0) {
return ConstantFP::get(x->getType(), 1);
}
int lastSetPos = -1;
Value *result = nullptr;
Value *mul = nullptr;
for (int i = 0; i < 32; i++) {
if ((absY >> i) & 1) {
for (int j = i; j > lastSetPos; j--) {
if (!mul) {
mul = x;
} else {
mul = Builder.CreateFMul(mul, mul);
}
}
result = (result == nullptr) ? mul : Builder.CreateFMul(result, mul);
lastSetPos = i;
}
}
// Compute reciprocal for negative power values.
if (y < 0) {
Value *constOne = ConstantFP::get(x->getType(), 1);
result = Builder.CreateFDiv(constOne, result);
}
return result;
}
Value *TranslatePowImpl(hlsl::OP *hlslOP, IRBuilder<> &Builder, Value *x,
Value *y, bool isFXCCompatMode = false) {
// As applicable implement pow using only mul ops as done by Fxc.
int32_t p = 0;
if (CanUseFxcMulOnlyPatternForPow(Builder, x, y, p)) {
if (isFXCCompatMode) {
return TranslatePowUsingFxcMulOnlyPattern(Builder, x, p);
} else if (p == 2) {
// Only take care 2 for it will not affect register pressure.
return Builder.CreateFMul(x, x);
}
}
// Default to log-mul-exp pattern if previous scenarios don't apply.
// t = log(x);
Value *logX =
TrivialDxilUnaryOperation(DXIL::OpCode::Log, x, hlslOP, Builder);
// t = y * t;
Value *mulY = Builder.CreateFMul(logX, y);
// pow = exp(t);
return TrivialDxilUnaryOperation(DXIL::OpCode::Exp, mulY, hlslOP, Builder);
}
Value *TranslateAddUint64(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
IRBuilder<> Builder(CI);
Value *val = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
Type *Ty = val->getType();
VectorType *VT = dyn_cast<VectorType>(Ty);
if (!VT) {
dxilutil::EmitErrorOnInstruction(
CI, "AddUint64 can only be applied to uint2 and uint4 operands.");
return UndefValue::get(Ty);
}
unsigned size = VT->getNumElements();
if (size != 2 && size != 4) {
dxilutil::EmitErrorOnInstruction(
CI, "AddUint64 can only be applied to uint2 and uint4 operands.");
return UndefValue::get(Ty);
}
Value *op0 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc0Idx);
Value *op1 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc1Idx);
Value *RetVal = UndefValue::get(Ty);
Function *AddC = hlslOP->GetOpFunc(DXIL::OpCode::UAddc, helper.i32Ty);
Value *opArg = Builder.getInt32(static_cast<unsigned>(DXIL::OpCode::UAddc));
for (unsigned i = 0; i < size; i += 2) {
Value *low0 = Builder.CreateExtractElement(op0, i);
Value *low1 = Builder.CreateExtractElement(op1, i);
Value *lowWithC = Builder.CreateCall(AddC, {opArg, low0, low1});
Value *low = Builder.CreateExtractValue(lowWithC, 0);
RetVal = Builder.CreateInsertElement(RetVal, low, i);
Value *carry = Builder.CreateExtractValue(lowWithC, 1);
// Ext i1 to i32
carry = Builder.CreateZExt(carry, helper.i32Ty);
Value *hi0 = Builder.CreateExtractElement(op0, i + 1);
Value *hi1 = Builder.CreateExtractElement(op1, i + 1);
Value *hi = Builder.CreateAdd(hi0, hi1);
hi = Builder.CreateAdd(hi, carry);
RetVal = Builder.CreateInsertElement(RetVal, hi, i + 1);
}
return RetVal;
}
bool IsValidLoadInput(Value *V) {
// Must be load input.
// TODO: report this error on front-end
if (!V || !isa<CallInst>(V)) {
return false;
}
CallInst *CI = cast<CallInst>(V);
// Must be immediate.
ConstantInt *opArg =
cast<ConstantInt>(CI->getArgOperand(DXIL::OperandIndex::kOpcodeIdx));
DXIL::OpCode op = static_cast<DXIL::OpCode>(opArg->getLimitedValue());
if (op != DXIL::OpCode::LoadInput) {
return false;
}
return true;
}
// Tunnel through insert/extract element and shuffle to find original source
// of scalar value, or specified element (vecIdx) of vector value.
Value *FindScalarSource(Value *src, unsigned vecIdx = 0) {
Type *srcTy = src->getType()->getScalarType();
while (src && !isa<UndefValue>(src)) {
if (src->getType()->isVectorTy()) {
if (InsertElementInst *IE = dyn_cast<InsertElementInst>(src)) {
unsigned curIdx = (unsigned)cast<ConstantInt>(IE->getOperand(2))
->getUniqueInteger()
.getLimitedValue();
src = IE->getOperand((curIdx == vecIdx) ? 1 : 0);
} else if (ShuffleVectorInst *SV = dyn_cast<ShuffleVectorInst>(src)) {
int newIdx = SV->getMaskValue(vecIdx);
if (newIdx < 0)
return UndefValue::get(srcTy);
vecIdx = (unsigned)newIdx;
src = SV->getOperand(0);
unsigned numElt = src->getType()->getVectorNumElements();
if (numElt <= vecIdx) {
vecIdx -= numElt;
src = SV->getOperand(1);
}
} else {
return UndefValue::get(srcTy); // Didn't find it.
}
} else {
if (ExtractElementInst *EE = dyn_cast<ExtractElementInst>(src)) {
vecIdx = (unsigned)cast<ConstantInt>(EE->getIndexOperand())
->getUniqueInteger()
.getLimitedValue();
src = EE->getVectorOperand();
} else if (hlsl::dxilutil::IsConvergentMarker(src)) {
src = hlsl::dxilutil::GetConvergentSource(src);
} else {
break; // Found it.
}
}
}
return src;
}
// Finds corresponding inputs, calls translation for each, and returns
// resulting vector or scalar.
// Uses functor that takes (inputElemID, rowIdx, colIdx), and returns
// translation for one input scalar.
Value *TranslateEvalHelper(
CallInst *CI, Value *val, IRBuilder<> &Builder,
std::function<Value *(Value *, Value *, Value *)> fnTranslateScalarInput) {
Type *Ty = CI->getType();
Value *result = UndefValue::get(Ty);
if (Ty->isVectorTy()) {
for (unsigned i = 0; i < Ty->getVectorNumElements(); ++i) {
Value *InputEl = FindScalarSource(val, i);
if (!IsValidLoadInput(InputEl)) {
dxilutil::EmitErrorOnInstruction(
CI, "attribute evaluation can only be done "
"on values taken directly from inputs.");
return result;
}
CallInst *loadInput = cast<CallInst>(InputEl);
Value *inputElemID =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputIDOpIdx);
Value *rowIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputRowOpIdx);
Value *colIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputColOpIdx);
Value *Elt = fnTranslateScalarInput(inputElemID, rowIdx, colIdx);
result = Builder.CreateInsertElement(result, Elt, i);
}
} else {
Value *InputEl = FindScalarSource(val);
if (!IsValidLoadInput(InputEl)) {
dxilutil::EmitErrorOnInstruction(CI,
"attribute evaluation can only be done "
"on values taken directly from inputs.");
return result;
}
CallInst *loadInput = cast<CallInst>(InputEl);
Value *inputElemID =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputIDOpIdx);
Value *rowIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputRowOpIdx);
Value *colIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputColOpIdx);
result = fnTranslateScalarInput(inputElemID, rowIdx, colIdx);
}
return result;
}
Value *TranslateEvalSample(CallInst *CI, IntrinsicOp IOP, OP::OpCode op,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *val = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc0Idx);
Value *sampleIdx = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc1Idx);
IRBuilder<> Builder(CI);
OP::OpCode opcode = OP::OpCode::EvalSampleIndex;
Value *opArg = hlslOP->GetU32Const((unsigned)opcode);
Function *evalFunc =
hlslOP->GetOpFunc(opcode, CI->getType()->getScalarType());
return TranslateEvalHelper(
CI, val, Builder,
[&](Value *inputElemID, Value *rowIdx, Value *colIdx) -> Value * {
return Builder.CreateCall(
evalFunc, {opArg, inputElemID, rowIdx, colIdx, sampleIdx});