forked from facebook/hhvm
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathcode-gen-x64.cpp
5632 lines (4964 loc) · 184 KB
/
code-gen-x64.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
/*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-2014 Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#include "hphp/runtime/vm/jit/code-gen-x64.h"
#include <cstring>
#include <iostream>
#include <limits>
#include <unwind.h>
#include <vector>
#include <folly/ScopeGuard.h>
#include <folly/Format.h>
#include "hphp/util/trace.h"
#include "hphp/util/text-util.h"
#include "hphp/util/abi-cxx.h"
#include "hphp/runtime/base/comparisons.h"
#include "hphp/runtime/base/complex-types.h"
#include "hphp/runtime/base/mixed-array.h"
#include "hphp/runtime/base/rds-header.h"
#include "hphp/runtime/base/rds-util.h"
#include "hphp/runtime/base/rds.h"
#include "hphp/runtime/base/runtime-option.h"
#include "hphp/runtime/base/stats.h"
#include "hphp/runtime/base/string-data.h"
#include "hphp/runtime/base/types.h"
#include "hphp/runtime/ext/asio/asio_blockable.h"
#include "hphp/runtime/ext/asio/async_function_wait_handle.h"
#include "hphp/runtime/ext/asio/wait_handle.h"
#include "hphp/runtime/ext/ext_closure.h"
#include "hphp/runtime/ext/ext_collections.h"
#include "hphp/runtime/ext/ext_generator.h"
#include "hphp/runtime/vm/bytecode.h"
#include "hphp/runtime/vm/jit/arg-group.h"
#include "hphp/runtime/vm/jit/back-end-x64.h"
#include "hphp/runtime/vm/jit/cfg.h"
#include "hphp/runtime/vm/jit/code-gen-helpers-x64.h"
#include "hphp/runtime/vm/jit/ir-opcode.h"
#include "hphp/runtime/vm/jit/mc-generator-internal.h"
#include "hphp/runtime/vm/jit/mc-generator.h"
#include "hphp/runtime/vm/jit/native-calls.h"
#include "hphp/runtime/vm/jit/print.h"
#include "hphp/runtime/vm/jit/prof-data.h"
#include "hphp/runtime/vm/jit/punt.h"
#include "hphp/runtime/vm/jit/reg-algorithms.h"
#include "hphp/runtime/vm/jit/service-requests-inline.h"
#include "hphp/runtime/vm/jit/service-requests-x64.h"
#include "hphp/runtime/vm/jit/target-cache.h"
#include "hphp/runtime/vm/jit/target-profile.h"
#include "hphp/runtime/vm/jit/timer.h"
#include "hphp/runtime/vm/jit/translator-inline.h"
#include "hphp/runtime/vm/jit/translator.h"
#include "hphp/runtime/vm/jit/types.h"
#include "hphp/runtime/vm/jit/vasm-x64.h"
#include "hphp/runtime/vm/runtime.h"
#define rVmSp DontUseRVmSpInThisFile
using HPHP::jit::TCA;
namespace HPHP { namespace jit { namespace x64 {
TRACE_SET_MOD(hhir);
namespace {
//////////////////////////////////////////////////////////////////////
using namespace jit::reg;
/*
* It's not normally ok to directly use tracelet abi registers in
* codegen, unless you're directly dealing with an instruction that
* does near-end-of-tracelet glue. (Or also we sometimes use them
* just for some static_assertions relating to calls to helpers from
* mcg that hardcode these registers.)
*/
void cgPunt(const char* file, int line, const char* func, uint32_t bcOff,
const Func* vmFunc, bool resumed,
TransID profTransId) ATTRIBUTE_NORETURN;
void cgPunt(const char* file, int line, const char* func, uint32_t bcOff,
const Func* vmFunc, bool resumed, TransID profTransId) {
if (dumpIREnabled()) {
auto const phpFile = vmFunc->filename()->data();
auto const phpLine = vmFunc->unit()->getLineNumber(bcOff);
HPHP::Trace::trace("--------- CG_PUNT %s at %s:%d from %s:%d (bcOff %d)\n",
func, file, line, phpFile, phpLine, bcOff);
}
throw FailedCodeGen(file, line, func, bcOff, vmFunc, resumed, profTransId);
}
#define CG_PUNT(marker, instr) \
cgPunt(__FILE__, __LINE__, #instr, marker.bcOff(), \
getFunc(marker), resumed(marker), marker.profTransId())
const char* getContextName(const Class* ctx) {
return ctx ? ctx->name()->data() : ":anonymous:";
}
} // unnamed namespace
//////////////////////////////////////////////////////////////////////
template <class Then>
void CodeGenerator::unlikelyIfBlock(Vout& v, Vout& vcold, ConditionCode cc,
Vreg sf, Then then) {
auto unlikely = vcold.makeBlock();
auto done = v.makeBlock();
v << jcc{cc, sf, {done, unlikely}};
vcold = unlikely;
then(vcold);
if (!vcold.closed()) vcold << jmp{done};
v = done;
}
template <class Block>
void CodeGenerator::ifBlock(Vout& v, Vout& vcold, ConditionCode cc, Vreg sf,
Block taken, bool unlikely) {
if (unlikely) return unlikelyIfBlock(v, vcold, cc, sf, taken);
auto takenLabel = v.makeBlock();
auto doneLabel = v.makeBlock();
v << jcc{cc, sf, {doneLabel, takenLabel}};
v = takenLabel;
taken(v);
if (!v.closed()) v << jmp{doneLabel};
v = doneLabel;
}
// Generate an if-then-else block
template <class Then, class Else>
void CodeGenerator::ifThenElse(Vout& v, ConditionCode cc, Vreg sf,
Then thenBlock, Else elseBlock) {
auto thenLabel = v.makeBlock();
auto elseLabel = v.makeBlock();
auto done = v.makeBlock();
v << jcc{cc, sf, {elseLabel, thenLabel}};
v = thenLabel;
thenBlock(v);
if (!v.closed()) v << jmp{done};
v = elseLabel;
elseBlock(v);
if (!v.closed()) v << jmp{done};
v = done;
}
template <class Then, class Else>
void CodeGenerator::ifThenElse(Vout& v, Vout& vcold, ConditionCode cc, Vreg sf,
Then thenBlock, Else elseBlock, bool unlikely) {
if (unlikely) {
return unlikelyIfThenElse(v, vcold, cc, sf, thenBlock, elseBlock);
}
ifThenElse(v, cc, sf, thenBlock, elseBlock);
}
template <class Then, class Else>
void CodeGenerator::unlikelyIfThenElse(Vout& v, Vout& vcold, ConditionCode cc,
Vreg sf, Then unlikelyBlock,
Else elseBlock) {
auto elseLabel = v.makeBlock();
auto unlikelyLabel = vcold.makeBlock();
auto done = v.makeBlock();
v << jcc{cc, sf, {elseLabel, unlikelyLabel}};
v = elseLabel;
elseBlock(v);
if (!v.closed()) v << jmp{done};
vcold = unlikelyLabel;
unlikelyBlock(vcold);
if (!vcold.closed()) vcold << jmp{done};
v = done;
}
// emit an if-then-else condition where the true case is unlikely.
template <class T, class F>
Vreg unlikelyCond(Vout& v, Vout& vc, ConditionCode cc, Vreg sf, Vreg d, T t,
F f) {
auto fblock = v.makeBlock();
auto tblock = vc.makeBlock();
auto done = v.makeBlock();
v << jcc{cc, sf, {fblock, tblock}};
vc = tblock;
auto treg = t(vc);
vc << phijmp{done, vc.makeTuple({treg})};
v = fblock;
auto freg = f(v);
v << phijmp{done, v.makeTuple({freg})};
v = done;
v << phidef{v.makeTuple({d})};
return d;
}
/*
* Generate an if-block that branches around some unlikely code, handling
* the cases when a == astubs and a != astubs. cc is the branch condition
* to run the unlikely block.
*
* Passes the proper assembler to use to the unlikely function.
*/
template <class Then>
void unlikelyIfThen(Vout& vmain, Vout& vstub, ConditionCode cc, Vreg sf,
Then then) {
auto unlikely = vstub.makeBlock();
auto done = vmain.makeBlock();
vmain << jcc{cc, sf, {done, unlikely}};
vstub = unlikely;
then(vstub);
if (!vstub.closed()) vstub << jmp{done};
vmain = done;
}
// Generate an if-then-else block
template <class Then, class Else>
void ifThenElse(Vout& v, ConditionCode cc, Vreg sf, Then thenBlock,
Else elseBlock) {
auto thenLabel = v.makeBlock();
auto elseLabel = v.makeBlock();
auto done = v.makeBlock();
v << jcc{cc, sf, {elseLabel, thenLabel}};
v = thenLabel;
thenBlock();
if (!v.closed()) v << jmp{done};
v = elseLabel;
elseBlock();
if (!v.closed()) v << jmp{done};
v = done;
}
/*
* Same as ifThenElse except the first block is off in astubs
*/
template <class Then, class Else>
void unlikelyIfThenElse(Vout& vmain, Vout& vstub, ConditionCode cc, Vreg sf,
Then unlikelyBlock, Else elseBlock) {
auto elseLabel = vmain.makeBlock();
auto unlikelyLabel = vstub.makeBlock();
auto done = vmain.makeBlock();
vmain << jcc{cc, sf, {elseLabel, unlikelyLabel}};
vmain = elseLabel;
elseBlock(vmain);
if (!vmain.closed()) vmain << jmp{done};
vstub = unlikelyLabel;
unlikelyBlock(vstub);
if (!vstub.closed()) vstub << jmp{done};
vmain = done;
}
Vloc CodeGenerator::srcLoc(const IRInstruction* inst, unsigned i) const {
return m_state.locs[inst->src(i)];
}
Vloc CodeGenerator::dstLoc(const IRInstruction* inst, unsigned i) const {
return m_state.locs[inst->dst(i)];
}
ArgGroup CodeGenerator::argGroup(const IRInstruction* inst) const {
return ArgGroup(inst, m_state.locs);
}
void CodeGenerator::cgInst(IRInstruction* inst) {
switch (inst->op()) {
#define O(name, dsts, srcs, flags) \
case name: FTRACE(7, "cg" #name "\n"); \
cg ## name (inst); \
break;
IR_OPCODES
#undef O
default:
always_assert(false);
}
auto& v = vmain();
if (inst->isBlockEnd() && !v.closed()) {
if (auto next = inst->next()) {
v << jmp{m_state.labels[next]};
} else {
v << ud2{}; // or end?
}
}
}
#define NOOP_OPCODE(opcode) \
void CodeGenerator::cg##opcode(IRInstruction*) {}
#define CALL_OPCODE(opcode) \
void CodeGenerator::cg##opcode(IRInstruction* i) { cgCallNative(vmain(), i); }
#define CALL_STK_OPCODE(opcode) \
CALL_OPCODE(opcode) \
CALL_OPCODE(opcode ## Stk)
NOOP_OPCODE(DefConst)
NOOP_OPCODE(DefFP)
NOOP_OPCODE(AssertLoc)
NOOP_OPCODE(Nop)
NOOP_OPCODE(TakeStack)
NOOP_OPCODE(TakeRef)
NOOP_OPCODE(EndGuards)
NOOP_OPCODE(HintLocInner)
CALL_OPCODE(AddElemStrKey)
CALL_OPCODE(AddElemIntKey)
CALL_OPCODE(AddNewElem)
CALL_OPCODE(ArrayAdd)
CALL_OPCODE(Box)
CALL_OPCODE(ColAddElemC)
CALL_OPCODE(ColAddNewElemC)
CALL_OPCODE(CoerceCellToBool);
CALL_OPCODE(CoerceCellToInt);
CALL_OPCODE(CoerceCellToDbl);
CALL_OPCODE(CoerceStrToDbl);
CALL_OPCODE(CoerceStrToInt);
CALL_OPCODE(ConvBoolToArr);
CALL_OPCODE(ConvDblToArr);
CALL_OPCODE(ConvIntToArr);
CALL_OPCODE(ConvObjToArr);
CALL_OPCODE(ConvStrToArr);
CALL_OPCODE(ConvCellToArr);
CALL_OPCODE(ConvStrToBool);
CALL_OPCODE(ConvCellToBool);
CALL_OPCODE(ConvArrToDbl);
CALL_OPCODE(ConvObjToDbl);
CALL_OPCODE(ConvStrToDbl);
CALL_OPCODE(ConvCellToDbl);
CALL_OPCODE(ConvArrToInt);
CALL_OPCODE(ConvObjToInt);
CALL_OPCODE(ConvStrToInt);
CALL_OPCODE(ConvCellToInt);
CALL_OPCODE(ConvCellToObj);
CALL_OPCODE(ConvDblToStr);
CALL_OPCODE(ConvIntToStr);
CALL_OPCODE(ConvObjToStr);
CALL_OPCODE(ConvResToStr);
CALL_OPCODE(ConvCellToStr);
CALL_OPCODE(ConcatStrStr);
CALL_OPCODE(ConcatStrInt);
CALL_OPCODE(ConcatIntStr);
CALL_OPCODE(ConcatStr3);
CALL_OPCODE(ConcatStr4);
CALL_OPCODE(CreateCont)
CALL_OPCODE(CreateAFWH)
CALL_OPCODE(CreateSSWH)
CALL_OPCODE(AFWHPrepareChild)
CALL_OPCODE(ABCUnblock)
CALL_OPCODE(NewArray)
CALL_OPCODE(NewMixedArray)
CALL_OPCODE(NewVArray)
CALL_OPCODE(NewMIArray)
CALL_OPCODE(NewMSArray)
CALL_OPCODE(NewLikeArray)
CALL_OPCODE(AllocPackedArray)
CALL_OPCODE(NewCol)
CALL_OPCODE(Clone)
CALL_OPCODE(AllocObj)
CALL_OPCODE(CustomInstanceInit)
CALL_OPCODE(InitProps)
CALL_OPCODE(InitSProps)
CALL_OPCODE(RegisterLiveObj)
CALL_OPCODE(LdClsCtor)
CALL_OPCODE(LookupClsMethod)
CALL_OPCODE(LookupClsRDSHandle)
CALL_OPCODE(LdArrFuncCtx)
CALL_OPCODE(LdArrFPushCuf)
CALL_OPCODE(LdStrFPushCuf)
CALL_OPCODE(PrintStr)
CALL_OPCODE(PrintInt)
CALL_OPCODE(PrintBool)
CALL_OPCODE(DbgAssertPtr)
CALL_OPCODE(LdSwitchDblIndex)
CALL_OPCODE(LdSwitchStrIndex)
CALL_OPCODE(LdSwitchObjIndex)
CALL_OPCODE(VerifyParamCallable)
CALL_OPCODE(VerifyParamFail)
CALL_OPCODE(VerifyRetCallable)
CALL_OPCODE(VerifyRetFail)
CALL_OPCODE(RaiseUninitLoc)
CALL_OPCODE(WarnNonObjProp)
CALL_OPCODE(RaiseUndefProp)
CALL_OPCODE(RaiseError)
CALL_OPCODE(RaiseWarning)
CALL_OPCODE(RaiseNotice)
CALL_OPCODE(RaiseArrayIndexNotice)
CALL_OPCODE(IncStatGrouped)
CALL_OPCODE(ClosureStaticLocInit)
CALL_OPCODE(GenericIdx)
CALL_OPCODE(LdClsPropAddrOrNull)
CALL_OPCODE(LdClsPropAddrOrRaise)
CALL_OPCODE(LdGblAddrDef)
// Vector instruction helpers
CALL_OPCODE(StringGet)
CALL_STK_OPCODE(BindElem)
CALL_STK_OPCODE(SetWithRefElem)
CALL_STK_OPCODE(SetWithRefNewElem)
CALL_STK_OPCODE(SetOpElem)
CALL_STK_OPCODE(IncDecElem)
CALL_STK_OPCODE(SetNewElem)
CALL_STK_OPCODE(SetNewElemArray)
CALL_STK_OPCODE(BindNewElem)
CALL_OPCODE(VectorIsset)
CALL_OPCODE(PairIsset)
CALL_OPCODE(InstanceOfIface)
CALL_OPCODE(InterfaceSupportsArr)
CALL_OPCODE(InterfaceSupportsStr)
CALL_OPCODE(InterfaceSupportsInt)
CALL_OPCODE(InterfaceSupportsDbl)
CALL_OPCODE(ZeroErrorLevel)
CALL_OPCODE(RestoreErrorLevel)
CALL_OPCODE(Count)
CALL_OPCODE(SuspendHookE)
CALL_OPCODE(SuspendHookR)
CALL_OPCODE(ReturnHook)
CALL_OPCODE(OODeclExists)
CALL_OPCODE(GetMemoKey)
#undef NOOP_OPCODE
Vlabel CodeGenerator::label(Block* b) {
return m_state.labels[b];
}
void CodeGenerator::emitStoreTypedValue(Vout& v, Vreg base, ptrdiff_t offset,
Vloc src, Type srcType) {
if (srcType.needsValueReg()) {
if (srcType.subtypeOf(Type::Bool)) {
auto extended = v.makeReg();
v << movzbq{src.reg(0), extended};
v << store{extended, base[offset + TVOFF(m_data)]};
} else {
v << store{src.reg(0), base[offset + TVOFF(m_data)]};
}
}
if (src.hasReg(1)) {
v << storeb{src.reg(1), base[offset + TVOFF(m_type)]};
} else {
assert(srcType.isKnownDataType());
v << storeb{v.cns(srcType.toDataType()), base[offset + TVOFF(m_type)]};
}
}
void CodeGenerator::emitFwdJcc(Vout& v, ConditionCode cc, Vreg sf,
Block* target) {
auto next = v.makeBlock();
v << jcc{cc, sf, {next, m_state.labels[target]}};
v = next;
}
Vreg CodeGenerator::emitCompare(Vout& v, IRInstruction* inst) {
auto const type0 = inst->src(0)->type();
auto const type1 = inst->src(1)->type();
// can't generate CMP instructions correctly for anything that isn't
// a bool or a numeric, and we can't mix bool/numerics because
// -1 == true in PHP, but not in HHIR binary representation
if (!((type0 <= Type::Int && type1 <= Type::Int) ||
(type0 <= Type::Bool && type1 <= Type::Bool) ||
(type0 <= Type::Cls && type1 <= Type::Cls))) {
CG_PUNT(inst->marker(), emitCompare);
}
auto reg0 = srcLoc(inst, 0).reg();
auto reg1 = srcLoc(inst, 1).reg();
auto const sf = v.makeReg();
if (type0 <= Type::Bool) {
v << cmpb{reg1, reg0, sf};
} else {
v << cmpq{reg1, reg0, sf};
}
return sf;
}
Vreg CodeGenerator::emitCompareInt(Vout& v, IRInstruction* inst) {
auto srcReg0 = srcLoc(inst, 0).reg();
auto srcReg1 = srcLoc(inst, 1).reg();
auto const sf = v.makeReg();
// Note the reverse syntax in the assembler.
// This cmp will compute srcReg0 - srcReg1
v << cmpq{srcReg1, srcReg0, sf};
return sf;
}
void CodeGenerator::emitReqBindJcc(Vout& v, ConditionCode cc, Vreg sf,
const ReqBindJccData* extra) {
v << bindjcc1st{cc, sf, {extra->notTaken, extra->taken}, kCrossTraceRegs};
}
void CodeGenerator::cgDefSP(IRInstruction* inst) {
auto sp = dstLoc(inst, 0).reg();
auto& v = vmain();
v << defvmsp{dstLoc(inst, 0).reg()};
if (RuntimeOption::EvalHHIRGenerateAsserts && !inst->marker().resumed()) {
auto const fp = srcLoc(inst, 0).reg();
auto expectSp = v.makeReg();
auto const sf = v.makeReg();
// Verify that rVmSp == rbp - spOff
v << lea{fp[-cellsToBytes(inst->extra<StackOffset>()->offset)], expectSp};
v << cmpq{expectSp, sp, sf};
ifBlock(v, vcold(), CC_NE, sf, [](Vout& v) { v << ud2(); });
}
}
void CodeGenerator::cgCheckNullptr(IRInstruction* inst) {
if (!inst->taken()) return;
auto reg = srcLoc(inst, 0).reg(0);
auto& v = vmain();
auto const sf = v.makeReg();
v << testq{reg, reg, sf};
v << jcc{CC_NZ, sf, {label(inst->next()), label(inst->taken())}};
}
void CodeGenerator::cgCheckNonNull(IRInstruction* inst) {
auto srcReg = srcLoc(inst, 0).reg();
auto dstReg = dstLoc(inst, 0).reg();
auto taken = inst->taken();
assert(taken);
auto& v = vmain();
auto const sf = v.makeReg();
v << testq{srcReg, srcReg, sf};
emitFwdJcc(v, CC_Z, sf, taken);
v << copy{srcReg, dstReg};
}
void CodeGenerator::cgAssertNonNull(IRInstruction* inst) {
auto& v = vmain();
auto srcReg = srcLoc(inst, 0).reg();
auto dstReg = dstLoc(inst, 0).reg();
if (RuntimeOption::EvalHHIRGenerateAsserts) {
auto const sf = v.makeReg();
v << testq{srcReg, srcReg, sf};
ifThen(v, CC_Z, sf, [&](Vout& v) {
v << ud2{};
});
}
v << copy{srcReg, dstReg};
}
void CodeGenerator::cgExceptionBarrier(IRInstruction* inst) {
vmain() << copy{srcLoc(inst, 0).reg(), dstLoc(inst, 0).reg()};
}
void CodeGenerator::cgAssertStk(IRInstruction* inst) {
vmain() << copy{srcLoc(inst, 0).reg(), dstLoc(inst, 0).reg()};
}
void CodeGenerator::cgHintStkInner(IRInstruction* inst) {
vmain() << copy{srcLoc(inst, 0).reg(), dstLoc(inst, 0).reg()};
}
void CodeGenerator::cgAssertType(IRInstruction* inst) {
copyTV(vmain(), srcLoc(inst, 0), dstLoc(inst, 0), inst->dst()->type());
}
void CodeGenerator::cgLdUnwinderValue(IRInstruction* inst) {
emitLoad(inst->dst(), dstLoc(inst, 0), rVmTl[unwinderTvOff()]);
}
void CodeGenerator::cgBeginCatch(IRInstruction* inst) {
auto& v = vmain();
v << landingpad{};
emitIncStat(v, Stats::TC_CatchTrace);
}
void CodeGenerator::cgEndCatch(IRInstruction* inst) {
auto v = vmain();
v << vcall{CppCall::direct(unwindResumeHelper), v.makeVcallArgs({{}}),
v.makeTuple({})};
v << ud2{};
}
void CodeGenerator::cgUnwindCheckSideExit(IRInstruction* inst) {
auto& v = vmain();
auto const sf = v.makeReg();
v << cmpbim{0, rVmTl[unwinderSideExitOff()], sf};
auto done = v.makeBlock();
v << jcc{CC_E, sf, {done, label(inst->taken())}};
v = done;
// doSideExit == true, so fall through to the side exit code
emitIncStat(v, Stats::TC_CatchSideExit);
}
void CodeGenerator::cgDeleteUnwinderException(IRInstruction* inst) {
auto& v = vmain();
auto exn = v.makeReg();
v << load{rVmTl[unwinderExnOff()], exn};
v << vcall{CppCall::direct(_Unwind_DeleteException),
v.makeVcallArgs({{exn}}), v.makeTuple({})};
}
void CodeGenerator::cgJcc(IRInstruction* inst) {
auto& v = vmain();
auto cc = opToConditionCode(inst->op());
auto const sf = emitCompare(v, inst);
v << jcc{cc, sf, {label(inst->next()), label(inst->taken())}};
}
void CodeGenerator::cgJccInt(IRInstruction* inst) {
auto& v = vmain();
auto cc = opToConditionCode(inst->op());
auto const sf = emitCompareInt(v, inst);
v << jcc{cc, sf, {label(inst->next()), label(inst->taken())}};
}
void CodeGenerator::cgReqBindJcc(IRInstruction* inst) {
// TODO(#2404427): prepareForTestAndSmash?
auto& v = vmain();
auto const sf = emitCompare(v, inst);
emitReqBindJcc(v, opToConditionCode(inst->op()), sf,
inst->extra<ReqBindJccData>());
}
void CodeGenerator::cgReqBindJccInt(IRInstruction* inst) {
// TODO(#2404427): prepareForTestAndSmash?
auto& v = vmain();
auto const sf = emitCompareInt(v, inst);
emitReqBindJcc(v, opToConditionCode(inst->op()), sf,
inst->extra<ReqBindJccData>());
}
void CodeGenerator::cgJmpGt(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpGte(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpLt(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpLte(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpEq(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpNeq(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpSame(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgJmpNSame(IRInstruction* i) { cgJcc(i); }
void CodeGenerator::cgReqBindJmpGt(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpGte(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpLt(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpLte(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpEq(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpNeq(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpSame(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgReqBindJmpNSame(IRInstruction* i) { cgReqBindJcc(i); }
void CodeGenerator::cgJmpGtInt(IRInstruction* i) { cgJccInt(i); }
void CodeGenerator::cgJmpGteInt(IRInstruction* i) { cgJccInt(i); }
void CodeGenerator::cgJmpLtInt(IRInstruction* i) { cgJccInt(i); }
void CodeGenerator::cgJmpLteInt(IRInstruction* i) { cgJccInt(i); }
void CodeGenerator::cgJmpEqInt(IRInstruction* i) { cgJccInt(i); }
void CodeGenerator::cgJmpNeqInt(IRInstruction* i) { cgJccInt(i); }
void CodeGenerator::cgReqBindJmpGtInt(IRInstruction* i) { cgReqBindJccInt(i); }
void CodeGenerator::cgReqBindJmpGteInt(IRInstruction* i) { cgReqBindJccInt(i); }
void CodeGenerator::cgReqBindJmpLtInt(IRInstruction* i) { cgReqBindJccInt(i); }
void CodeGenerator::cgReqBindJmpLteInt(IRInstruction* i) { cgReqBindJccInt(i); }
void CodeGenerator::cgReqBindJmpEqInt(IRInstruction* i) { cgReqBindJccInt(i); }
void CodeGenerator::cgReqBindJmpNeqInt(IRInstruction* i) { cgReqBindJccInt(i); }
//////////////////////////////////////////////////////////////////////
void CodeGenerator::cgHalt(IRInstruction* inst) {
vmain() << ud2{};
}
//////////////////////////////////////////////////////////////////////
void CodeGenerator::cgCallNative(Vout& v, IRInstruction* inst) {
using namespace NativeCalls;
always_assert(CallMap::hasInfo(inst->op()));
auto const& info = CallMap::info(inst->op());
ArgGroup argGroup = toArgGroup(info, m_state.locs, inst);
auto const dest = [&]() -> CallDest {
switch (info.dest) {
case DestType::None: return kVoidDest;
case DestType::TV:
case DestType::SIMD: return callDestTV(inst);
case DestType::SSA:
case DestType::Byte: return callDest(inst);
case DestType::Dbl: return callDestDbl(inst);
}
not_reached();
}();
cgCallHelper(v, info.func.call, dest, info.sync, argGroup);
}
CallDest CodeGenerator::callDest(Vreg reg0) const {
return { DestType::SSA, reg0 };
}
CallDest CodeGenerator::callDest(Vreg reg0, Vreg reg1) const {
return { DestType::SSA, reg0, reg1 };
}
CallDest CodeGenerator::callDest(const IRInstruction* inst) const {
if (!inst->numDsts()) return kVoidDest;
auto loc = dstLoc(inst, 0);
if (loc.numAllocated() == 0) return kVoidDest;
assert(loc.numAllocated() == 1);
return { inst->dst(0)->isA(Type::Bool) ? DestType::Byte : DestType::SSA,
loc.reg(0) };
}
CallDest CodeGenerator::callDestTV(const IRInstruction* inst) const {
if (!inst->numDsts()) return kVoidDest;
auto loc = dstLoc(inst, 0);
if (loc.numAllocated() == 0) return kVoidDest;
if (loc.isFullSIMD()) {
assert(loc.numAllocated() == 1);
return { DestType::SIMD, loc.reg(0) };
}
assert(loc.numAllocated() == 2);
return { DestType::TV, loc.reg(0), loc.reg(1) };
}
CallDest CodeGenerator::callDestDbl(const IRInstruction* inst) const {
if (!inst->numDsts()) return kVoidDest;
auto loc = dstLoc(inst, 0);
return { DestType::Dbl, loc.reg(0) };
}
// We can't really compile using the compact call if the address of the array
// vtable is in high memory (there is only an encoding for 32bit displacement).
// This can happen, for example, if we have address space randomization
// enabled. For now just punt these cases.
template<class Arg> CppCall
CodeGenerator::arrayCallIfLowMem(const IRInstruction* inst, Arg vtable) const {
if (!deltaFits(reinterpret_cast<uintptr_t>(vtable), sz::dword)) {
CG_PUNT(inst->marker(), ArrayDataVtableHighMemory);
}
return CppCall::array(vtable);
}
/*
* Prepare the given ArgDest for a call by shifting or zero-extending as
* appropriate, then append its Vreg to the given VregList.
*/
static void prepareArg(const ArgDesc& arg, Vout& v, VregList& vargs) {
switch (arg.kind()) {
case ArgDesc::Kind::Reg: {
auto reg = arg.srcReg();
if (arg.isZeroExtend()) {
reg = v.makeReg();
v << movzbq{arg.srcReg(), reg};
}
vargs.push_back(reg);
break;
}
case ArgDesc::Kind::TypeReg:
if (kTypeShiftBits > 0) {
auto tmp = v.makeReg();
v << shlqi{kTypeShiftBits, arg.srcReg(), tmp, v.makeReg()};
vargs.push_back(tmp);
} else {
vargs.push_back(arg.srcReg());
}
break;
case ArgDesc::Kind::Imm: {
vargs.push_back(v.cns(arg.imm().q()));
break;
}
case ArgDesc::Kind::Addr: {
auto tmp = v.makeReg();
v << lea{arg.srcReg()[arg.disp().l()], tmp};
vargs.push_back(tmp);
break;
}
}
}
void
CodeGenerator::cgCallHelper(Vout& v, CppCall call, const CallDest& dstInfo,
SyncOptions sync, ArgGroup& args) {
auto const inst = args.inst();
jit::vector<Vreg> vargs, vSimdArgs, vStkArgs;
for (size_t i = 0; i < args.numGpArgs(); ++i) {
prepareArg(args.gpArg(i), v, vargs);
}
for (size_t i = 0; i < args.numSimdArgs(); ++i) {
prepareArg(args.simdArg(i), v, vSimdArgs);
}
for (size_t i = 0; i < args.numStackArgs(); ++i) {
prepareArg(args.stkArg(i), v, vStkArgs);
}
Fixup syncFixup;
if (RuntimeOption::HHProfServerEnabled || sync != SyncOptions::kNoSyncPoint) {
// If we are profiling the heap, we always need to sync because regs need
// to be correct during smart allocations no matter what
syncFixup = makeFixup(inst->marker(), sync);
}
Vout next = v;
Vlabel targets[2];
bool nothrow = false;
auto* taken = inst->taken();
auto const do_catch = taken && taken->isCatch();
if (do_catch) {
always_assert_flog(
sync != SyncOptions::kNoSyncPoint,
"cgCallHelper called with kNoSyncPoint but inst has a catch block: {}\n",
*inst
);
always_assert_flog(
taken->catchMarker() == inst->marker(),
"Catch trace doesn't match fixup:\n"
"Instruction: {}\n"
"Catch trace: {}\n"
"Fixup : {}\n",
inst->toString(),
taken->catchMarker().show(),
inst->marker().show()
);
next = v.makeBlock();
targets[0] = next;
targets[1] = m_state.labels[taken];
} else if (!inst->is(Call, CallArray, ContEnter)) {
// The current instruction doesn't have a catch block so it'd better not
// throw. Register a null catch trace to indicate this to the
// unwinder. Call, CallArray, and ContEnter don't have catch blocks because
// they smash all live values and optimizations are aware of this.
nothrow = true;
}
VregList dstRegs;
if (dstInfo.reg0.isValid()) {
dstRegs.push_back(dstInfo.reg0);
if (dstInfo.reg1.isValid()) {
dstRegs.push_back(dstInfo.reg1);
}
}
auto argsId = v.makeVcallArgs(
{std::move(vargs), std::move(vSimdArgs), std::move(vStkArgs)});
auto dstId = v.makeTuple(std::move(dstRegs));
if (do_catch) {
v << vinvoke{call, argsId, dstId, {targets[0], targets[1]},
syncFixup, dstInfo.type, sync == SyncOptions::kSmashableAndSyncPoint};
} else {
v << vcall{call, argsId, dstId, syncFixup, dstInfo.type, nothrow};
}
v = next;
}
void CodeGenerator::cgMov(IRInstruction* inst) {
always_assert(inst->src(0)->numWords() == inst->dst(0)->numWords());
copyTV(vmain(), srcLoc(inst, 0), dstLoc(inst, 0), inst->dst()->type());
}
void CodeGenerator::cgAbsDbl(IRInstruction* inst) {
auto src = srcLoc(inst, 0).reg();
auto dst = dstLoc(inst, 0).reg();
auto& v = vmain();
v << absdbl{src, dst};
}
Vreg CodeGenerator::emitAddInt(Vout& v, IRInstruction* inst) {
SSATmp* src0 = inst->src(0);
SSATmp* src1 = inst->src(1);
auto s0 = srcLoc(inst, 0).reg();
auto s1 = srcLoc(inst, 1).reg();
auto d = dstLoc(inst, 0).reg();
auto const sf = v.makeReg();
// Special cases: x = y + 1, x = 1 + y
if (src1->isConst(1)) {
v << incq{s0, d, sf};
} else if (src0->isConst(1)) {
v << incq{s1, d, sf};
} else {
v << addq{s1, s0, d, sf};
}
return sf;
}
Vreg CodeGenerator::emitSubInt(Vout& v, IRInstruction* inst) {
auto src0 = inst->src(0);
auto src1 = inst->src(1);
auto s0 = srcLoc(inst, 0).reg();
auto s1 = srcLoc(inst, 1).reg();
auto d = dstLoc(inst, 0).reg();
auto const sf = v.makeReg();
if (src0->isConst(0)) {
// There is no unary negate HHIR instruction, so handle that here.
v << neg{s1, d, sf};
} else if (src1->isConst(1)) {
v << decq{s0, d, sf};
} else {
v << subq{s1, s0, d, sf};
}
return sf;
}
Vreg CodeGenerator::emitMulInt(Vout& v, IRInstruction* inst) {
auto s0 = srcLoc(inst, 0).reg();
auto s1 = srcLoc(inst, 1).reg();
auto d = dstLoc(inst, 0).reg();
auto const sf = v.makeReg();
v << imul{s1, s0, d, sf};
return sf;
}
void CodeGenerator::cgAddIntO(IRInstruction* inst) {
auto& v = vmain();
auto const sf = emitAddInt(v, inst);
v << jcc{CC_O, sf, {label(inst->next()), label(inst->taken())}};
}
void CodeGenerator::cgSubIntO(IRInstruction* inst) {
auto& v = vmain();
auto const sf = emitSubInt(v, inst);
assert(sf != InvalidReg);
v << jcc{CC_O, sf, {label(inst->next()), label(inst->taken())}};
}
void CodeGenerator::cgMulIntO(IRInstruction* inst) {
auto& v = vmain();
auto const sf = emitMulInt(v, inst);
v << jcc{CC_O, sf, {label(inst->next()), label(inst->taken())}};
}
void CodeGenerator::cgFloor(IRInstruction* inst) {
auto srcReg = srcLoc(inst, 0).reg();
auto dstReg = dstLoc(inst, 0).reg();
vmain() << roundsd{RoundDirection::floor, srcReg, dstReg};
}
void CodeGenerator::cgCeil(IRInstruction* inst) {
auto srcReg = srcLoc(inst, 0).reg();
auto dstReg = dstLoc(inst, 0).reg();
vmain() << roundsd{RoundDirection::ceil, srcReg, dstReg};
}
void CodeGenerator::cgAddInt(IRInstruction* inst) {
emitAddInt(vmain(), inst);
}
void CodeGenerator::cgSubInt(IRInstruction* inst) {
emitSubInt(vmain(), inst);
}
void CodeGenerator::cgMulInt(IRInstruction* inst) {
emitMulInt(vmain(), inst);
}
void CodeGenerator::cgAddDbl(IRInstruction* inst) {
auto s0 = srcLoc(inst, 0).reg();
auto s1 = srcLoc(inst, 1).reg();
auto d = dstLoc(inst, 0).reg();
vmain() << addsd{s1, s0, d};
}
void CodeGenerator::cgSubDbl(IRInstruction* inst) {
auto s0 = srcLoc(inst, 0).reg();
auto s1 = srcLoc(inst, 1).reg();
auto d = dstLoc(inst, 0).reg();
vmain() << subsd{s1, s0, d};
}
void CodeGenerator::cgMulDbl(IRInstruction* inst) {
auto s0 = srcLoc(inst, 0).reg();
auto s1 = srcLoc(inst, 1).reg();
auto d = dstLoc(inst, 0).reg();
auto& v = vmain();
v << mulsd{s1, s0, d};
}