-
Notifications
You must be signed in to change notification settings - Fork 392
/
Inliner.cpp
6567 lines (5574 loc) · 259 KB
/
Inliner.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
/*******************************************************************************
* Copyright (c) 2000, 2021 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at http://eclipse.org/legal/epl-2.0
* or the Apache License, Version 2.0 which accompanies this distribution
* and is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception [1] and GNU General Public
* License, version 2 with the OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#ifdef J9ZTPF
#define __TPF_DO_NOT_MAP_ATOE_REMOVE
#endif
#include "optimizer/Inliner.hpp"
#include <algorithm>
#include <assert.h>
#include <limits.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <exception>
#include <vector>
#include "codegen/CodeGenerator.hpp"
#include "env/FrontEnd.hpp"
#include "env/KnownObjectTable.hpp"
#include "codegen/RecognizedMethods.hpp"
#include "compile/Compilation.hpp"
#include "compile/InlineBlock.hpp"
#include "compile/Method.hpp"
#include "compile/OSRData.hpp"
#include "compile/ResolvedMethod.hpp"
#include "compile/SymbolReferenceTable.hpp"
#include "compile/VirtualGuard.hpp"
#include "control/Options.hpp"
#include "control/Options_inlines.hpp"
#include "control/Recompilation.hpp"
#include "cs2/allocator.h"
#include "cs2/bitvectr.h"
#include "cs2/sparsrbit.h"
#include "env/ClassEnv.hpp"
#include "env/CompilerEnv.hpp"
#include "env/ObjectModel.hpp"
#include "env/PersistentInfo.hpp"
#include "env/StackMemoryRegion.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/AliasSetInterface.hpp"
#include "il/AutomaticSymbol.hpp"
#include "il/Block.hpp"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/LabelSymbol.hpp"
#include "il/MethodSymbol.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/ParameterSymbol.hpp"
#include "il/ResolvedMethodSymbol.hpp"
#include "il/StaticSymbol.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "ilgen/IlGenRequest.hpp"
#include "ilgen/IlGeneratorMethodDetails.hpp"
#include "ilgen/IlGeneratorMethodDetails_inlines.hpp"
#include "infra/Array.hpp"
#include "infra/Assert.hpp"
#include "infra/BitVector.hpp"
#include "infra/Cfg.hpp"
#include "infra/HashTab.hpp"
#include "infra/Link.hpp"
#include "infra/List.hpp"
#include "infra/Random.hpp"
#include "infra/SimpleRegex.hpp"
#include "infra/Stack.hpp"
#include "infra/CfgEdge.hpp"
#include "infra/CfgNode.hpp"
#include "infra/ILWalk.hpp"
#include "optimizer/CallInfo.hpp"
#include "optimizer/InlinerFailureReason.hpp"
#include "optimizer/Optimization.hpp"
#include "optimizer/OptimizationManager.hpp"
#include "optimizer/Optimizations.hpp"
#include "optimizer/Optimizer.hpp"
#include "optimizer/PreExistence.hpp"
#include "optimizer/RematTools.hpp"
#include "optimizer/Structure.hpp"
#include "optimizer/StructuralAnalysis.hpp"
#include "ras/Debug.hpp"
#include "ras/DebugCounter.hpp"
#include "ras/LogTracer.hpp"
#include "runtime/Runtime.hpp"
#ifdef J9_PROJECT_SPECIFIC
#include "env/VMJ9.h"
#endif
namespace TR { class SimpleRegex; }
int32_t *NumInlinedMethods = NULL;
int32_t *InlinedSizes = NULL;
#define OPT_DETAILS "O^O INLINER: "
// == Hack markers ==
// To conserve owning method indexes, we share TR_ResolvedMethods even where
// the owning method differs. Usually that is done only for methods that the
// inliner never sees, but if we get aggressive and share TR_ResolvedMethods
// that are exposed to the inliner, then the inliner needs to make sure it
// doesn't rely on the "owning method" accurately representing the calling method.
//
// This is a fragile design that needs some more thought. We should either
// eliminate the limitations that motivate sharing in the first place, or else
// take the time to modify inliner (and everyone else) so it doesn't rely on
// owning method information to indicate the caller.
//
// For now, we mark such code with this macro.
//
#define OWNING_METHOD_MAY_NOT_BE_THE_CALLER (1)
#define MIN_NUM_CALLERS 20
#define MIN_FAN_IN_SIZE 50
#define SIZE_MULTIPLIER 4
#define FANIN_OTHER_BUCKET_THRESHOLD 0.5
#undef TRACE_CSI_IN_INLINER
bool rematerializeConstant(TR::Node *node, TR::Compilation *comp);
static bool isWarm(TR::Compilation *comp)
{
return comp->getMethodHotness() >= warm;
}
static bool isHot(TR::Compilation *comp)
{
return comp->getMethodHotness() >= hot;
}
static bool isScorching(TR::Compilation *comp)
{
return ((comp->getMethodHotness() >= scorching) || ((comp->getMethodHotness() >= veryHot) && comp->isProfilingCompilation())) ;
}
static bool succAndPredAreNotOSRBlocks(TR::CFGEdge * edge)
{
return
!toBlock(edge->getTo())->isOSRCodeBlock() &&
!toBlock(edge->getFrom())->isOSRCodeBlock() &&
!toBlock(edge->getTo())->isOSRCatchBlock() &&
!toBlock(edge->getFrom())->isOSRCatchBlock();
}
static bool succIsOSRCatchBlock(TR::CFGEdge * edge)
{
return toBlock(edge->getTo())->isOSRCatchBlock();
}
int32_t
OMR_InlinerPolicy::getInitialBytecodeSize(TR::ResolvedMethodSymbol * methodSymbol, TR::Compilation *comp)
{
return getInitialBytecodeSize(methodSymbol->getResolvedMethod(),methodSymbol, comp);
}
int32_t
OMR_InlinerPolicy::getInitialBytecodeSize(TR_ResolvedMethod *feMethod, TR::ResolvedMethodSymbol * methodSymbol, TR::Compilation *comp)
{
int32_t size = feMethod->maxBytecodeIndex();
if (!comp->getOption(TR_DisableAdaptiveDumbInliner))
{
if (methodSymbol && !methodSymbol->mayHaveInlineableCall() && size <= 5) // favor the inlining of methods that are very small
size = 1;
}
TR_ASSERT(size > 0, "size cannot be zero because it is used as a divisor");
return size;
}
TR::DataType getStoreType(TR::Node *store, TR::Symbol *addrSymbol, TR::Compilation *comp)
{
TR::DataType storeType = addrSymbol->getDataType();
return storeType;
}
TR_TrivialInliner::TR_TrivialInliner(TR::OptimizationManager *manager)
: TR::Optimization(manager)
{}
int32_t TR_TrivialInliner::perform()
{
comp()->generateAccurateNodeCount();
TR::ResolvedMethodSymbol * sym = comp()->getMethodSymbol();
if (sym->mayHaveInlineableCall() && optimizer()->isEnabled(OMR::inlining))
{
uint32_t initialSize = comp()->getOptions()->getTrivialInlinerMaxSize();;
if (comp()->getOption(TR_Randomize) || comp()->getOption(TR_VerbosePseudoRandom))
{
// In the following we ask the global cmdLineOptions about the getTrivialInlinerMaxSize()
// because the result of convertNonDeterministicInput is cached the first time is executed
// and don't want this result to be determined by the first compilation that comes through
static uint32_t defaultRandomSize = comp()->convertNonDeterministicInput(TR::Options::getCmdLineOptions()->getTrivialInlinerMaxSize(), 30, randomGenerator(), 0);
initialSize = defaultRandomSize;
}
initialSize = isHot(comp()) ? initialSize * 2 : initialSize;
TR_DumbInliner inliner(optimizer(), this, initialSize);
inliner.performInlining(sym);
}
comp()->setSupressEarlyInlining(false);
return 1; // cost??
}
const char *
TR_TrivialInliner::optDetailString() const throw()
{
return "O^O TRIVIAL INLINER: ";
}
//---------------------------------------------------------------------
// TR_InlinerBase
//---------------------------------------------------------------------
TR_InlinerBase::TR_InlinerBase(TR::Optimizer * optimizer, TR::Optimization *optimization)
: TR_HasRandomGenerator(optimizer->comp()),
_visitCount(optimizer->comp()->incVisitCount()),
_inliningAsWeWalk(false),
_optimizer(optimizer),
_trMemory(optimizer->comp()->trMemory()),
_availableTemps(_trMemory),
_availableBasicBlockTemps(_trMemory),
_storeToCachedPrivateStatic(NULL),
_disableTailRecursion(false),
_currentNumberOfNodes(optimizer->comp()->getAccurateNodeCount()),
_disableInnerPrex(false),
_aggressivelyInlineInLoops(false)
{
_policy = optimization->manager()->getOptPolicy() ? static_cast<OMR_InlinerPolicy*>(optimization->manager()->getOptPolicy()) : optimizer->getInlinerPolicy();
_util = optimizer->getInlinerUtil();
_policy->setInliner(this);
_util->setInliner(this);
if (!optimizer->isEnabled(OMR::innerPreexistence))
_disableInnerPrex = true;
setInlineVirtuals(true);
if (optimizer->getInlineSynchronized())
setInlineSynchronized(true);
_tracer = _util->getInlinerTracer(optimization);
_maxRecursiveCallByteCodeSizeEstimate=0;
_callerWeightLimit=0;
_methodByteCodeSizeThreshold=0;
_methodInColdBlockByteCodeSizeThreshold=0;
_methodInWarmBlockByteCodeSizeThreshold=0;
_nodeCountThreshold=0;
_maxInliningCallSites=0;
_numAsyncChecks=0;
_isInLoop = false;
_EDODisableInlinedProfilingInfo = false;
setInlineThresholds(comp()->getMethodSymbol());
}
void
TR_InlinerBase::setSizeThreshold(uint32_t size)
{
// This method is used to increase the threshold when inlining from places other than the Inliner. ex escape analysis, value prop, etc.
_methodByteCodeSizeThreshold = size;
heuristicTrace(tracer(),"Setting method size threshold (_methodByteCodeSizeThreshold) to %d\n",_methodByteCodeSizeThreshold);
}
void
OMR_InlinerPolicy::determineInliningHeuristic(TR::ResolvedMethodSymbol *callerSymbol)
{
return;
}
void
TR_InlinerBase::setInlineThresholds(TR::ResolvedMethodSymbol *callerSymbol)
{
int32_t size = getPolicy()->getInitialBytecodeSize(callerSymbol, comp());
getPolicy()->determineInliningHeuristic(callerSymbol);
//
// !!!!! Setting default thresholds for compilation.
//
if (isScorching(comp())) _callerWeightLimit = std::max(1500, size * 2);
else if (isHot(comp())) _callerWeightLimit = std::max(1500, size + (size >> 2));
else if (size < 125) _callerWeightLimit = 250;
else if (size < 700) _callerWeightLimit = std::max(700, size + (size >> 2));
else _callerWeightLimit = size + (size >> 3);
_callerWeightLimit -= size;
_nodeCountThreshold = 16000;
_methodInWarmBlockByteCodeSizeThreshold = _methodByteCodeSizeThreshold = 155;
_methodInColdBlockByteCodeSizeThreshold = 30;
_maxInliningCallSites = 4095;
_maxRecursiveCallByteCodeSizeEstimate = 1024;
if (comp()->getNodeCount() > _nodeCountThreshold)
{
_nodeCountThreshold = comp()->getNodeCount() * (1.05F); // allow a little bit of inlining anyways to get smaller methods
}
// Code That should go to its frontend
getUtil()->adjustCallerWeightLimit(callerSymbol, _callerWeightLimit);
getUtil()->adjustMethodByteCodeSizeThreshold(callerSymbol, _methodByteCodeSizeThreshold);
// let the FrontEnds have a chance to tweak inlining thresholds
getUtil()->refineInliningThresholds(comp(), _callerWeightLimit, _maxRecursiveCallByteCodeSizeEstimate, _methodByteCodeSizeThreshold,
_methodInWarmBlockByteCodeSizeThreshold, _methodInColdBlockByteCodeSizeThreshold, _nodeCountThreshold, size);
// Possible env variable overrides
static const char *a = feGetEnv("TR_MethodByteCodeSizeThreshold");
if (a)
_methodByteCodeSizeThreshold = atoi(a);
static const char *b = feGetEnv("TR_MethodInWarmBlockByteCodeSizeThreshold");
if (b)
_methodInWarmBlockByteCodeSizeThreshold = atoi(b);
static const char *c = feGetEnv("TR_MethodInColdBlockByteCodeSizeThreshold");
if (c)
_methodInColdBlockByteCodeSizeThreshold = atoi(c);
static const char *d = feGetEnv("TR_CallerWeightLimit");
if (d)
_callerWeightLimit = atoi(d);
static const char *e = feGetEnv("TR_NodeCountThreshold");
if (e)
_nodeCountThreshold = atoi(e);
// Under voluntary OSR, OSR blocks and additional stores can
// significantly increase the node count, particularly dead stores
// in OSRCodeBlocks. To maintain the same inlining behaviour, the
// threshold must be increased.
//
// The compile time overhead of this threshold increase has been tested
// and was not significant, as this threshold is typically only reached
// in hot or above compiles.
if (comp()->getOption(TR_EnableOSR) && comp()->getOSRMode() == TR::voluntaryOSR && comp()->supportsInduceOSR())
{
static const char *f = feGetEnv("TR_OSRNodeCountThreshold");
if (f)
_nodeCountThreshold = atoi(f);
else
_nodeCountThreshold *= 2;
}
//call random functions to allow randomness to change limits
if (comp()->getOption(TR_Randomize))
{
_nodeCountThreshold = (uint32_t)randomInt(32000);
_methodByteCodeSizeThreshold = comp()->convertNonDeterministicInput( _methodByteCodeSizeThreshold, 500, randomGenerator(), 0);
traceMsg(comp(),"\nTR_Randomize Enabled||TR_InlinerBase::inlineCallTarget, SeedValue:%d", comp()->getOptions()->getRandomSeed());
}
heuristicTrace(tracer(),"Inlining Limits:\n\tCaller Side Weight Limit (_callerWeightLimit) = %d \n\tCall Graph Size Threshold (_maxRecursiveCallByteCodeSizeEstimate) = %d "
"\n\tMethod size threshold (_methodByteCodeSizeThreshold) = %d \n\tMethod size threshold for warm (and above) compiles (_methodInWarmBlockByteCodeSizeThreshold) = %d"
"\n\tsize threshold for cold Calls (_methodInColdBlockByteCodeSizeThreshold) = %d\n\tNode Count Threshold (_nodeCountThreshold) = %d "
"\n\tSites Size (_maxInliningCallSites) = %d"
,_callerWeightLimit,_maxRecursiveCallByteCodeSizeEstimate,_methodByteCodeSizeThreshold,_methodInWarmBlockByteCodeSizeThreshold,_methodInColdBlockByteCodeSizeThreshold,_nodeCountThreshold,_maxInliningCallSites);
}
/**
* Go through each OSR code block b.
*
* 1) If b corresponds to the top caller (root of the call tree), it doesn't do
* anything because we have already implanted, during ilgen, a TR::igoto at
* the end of b which transfers control back to the VM.
* 2) Otherwise, replace the last treetop of b (which must be a goto or a
* return) to a goto to the OSR code block of the caller, and also make the
* corresponding changes to the CFG.
*/
void
TR_InlinerBase::linkOSRCodeBlocks()
{
TR_OSRCompilationData* compData = comp()->getOSRCompilationData();
const TR_Array<TR_OSRMethodData *>& methodDataArray = compData->getOSRMethodDataArray();
for (intptr_t i = 0; i < methodDataArray.size(); ++i)
{
TR_OSRMethodData *osrMethodData = methodDataArray[i];
if (osrMethodData == NULL
|| osrMethodData->getOSRCodeBlock() == NULL
|| osrMethodData->getInlinedSiteIndex() == -1
|| osrMethodData->linkedToCaller())
continue;
//For a non-top-level caller, we need to replace the return at the end of the OSR code block
//with a goto to the OSR code block of the caller
TR::Block *calleeOSRCodeBlock = osrMethodData->getOSRCodeBlock();
if (calleeOSRCodeBlock->isUnreachable())
continue;
TR::TreeTop* lastTT = calleeOSRCodeBlock->getLastRealTreeTop();
TR::Node* lastNode = lastTT->getNode();
TR_ASSERT(lastNode->getOpCode().isGoto() || lastNode->getOpCode().isReturn(),
"last treetop of a non-top-level caller OSR code block is neither a goto nor a return\n");
TR::Block *callerOSRCodeBlock = compData->findCallerOSRMethodData(osrMethodData)->getOSRCodeBlock();
TR_ASSERT(callerOSRCodeBlock != NULL, "caller's osr code block is empty\n");
TR::Node *gotoNode =
TR::Node::create(lastNode, TR::Goto, 0, callerOSRCodeBlock->getEntry());
TR_ASSERT((calleeOSRCodeBlock->getSuccessors().size() == 1), "calleeOSRCodeBlock %d(%x) has zero or more than one successor\n", calleeOSRCodeBlock->getNumber(), calleeOSRCodeBlock);
comp()->getFlowGraph()->removeEdge(calleeOSRCodeBlock->getSuccessors().front());
lastTT->unlink(true);
calleeOSRCodeBlock->append(TR::TreeTop::create(comp(), gotoNode));
comp()->getFlowGraph()->addEdge(calleeOSRCodeBlock, callerOSRCodeBlock);
osrMethodData->setLinkedToCaller(true);
}
}
void
TR_InlinerBase::performInlining(TR::ResolvedMethodSymbol * callerSymbol)
{
TR::StackMemoryRegion stackMemoryRegion(*trMemory());
TR_InnerPreexistenceInfo *innerPrexInfo = getUtil()->createInnerPrexInfo(comp(), callerSymbol, 0, 0, 0, TR_NoGuard);
bool inlinedSite = inlineCallTargets(callerSymbol, 0, innerPrexInfo);
if (comp()->getOption(TR_EnableOSR))
{
linkOSRCodeBlocks();
}
if (inlinedSite && comp()->trace(OMR::inlining))
{
traceMsg(comp(), "inlined some calls for method %s\n", comp()->signature());
}
cleanup(callerSymbol, inlinedSite);
if (debug("dumpInitialTrees") || comp()->getOption(TR_TraceTrees))
comp()->dumpMethodTrees("Post Inlining Trees");
}
void
TR_InlinerBase::cleanup(TR::ResolvedMethodSymbol * callerSymbol, bool inlinedSite)
{
comp()->resetInlineDepth();
if (inlinedSite)
{
callerSymbol->getFlowGraph()->removeUnreachableBlocks();
}
comp()->getSymRefTab()->clearAvailableAutos();
if (inlinedSite)
{
_optimizer->setUseDefInfo(NULL);
_optimizer->setValueNumberInfo(NULL);
_optimizer->setRequestOptimization(OMR::catchBlockRemoval);
_optimizer->setRequestOptimization(OMR::globalValuePropagation);
_optimizer->setRequestOptimization(OMR::eachExpensiveGlobalValuePropagationGroup);
_optimizer->setAliasSetsAreValid(false, true /*reset for WCode as well */);
}
}
bool
OMR_InlinerPolicy::mustBeInlinedEvenInDebug(TR_ResolvedMethod * calleeMethod, TR::TreeTop *callNodeTreeTop)
{
return false;
}
bool
TR_InlinerBase::alwaysWorthInlining(TR_ResolvedMethod * calleeMethod, TR::Node *callNode)
{
return getPolicy()->alwaysWorthInlining(calleeMethod, callNode);
}
bool
OMR_InlinerPolicy::alwaysWorthInlining(TR_ResolvedMethod * calleeMethod, TR::Node *callNode)
{
return false;
}
bool
TR_InlinerBase::exceedsSizeThreshold(TR_CallSite *callsite, int bytecodeSize, TR::Block * block, TR_ByteCodeInfo & bcInfo,
int32_t numLocals, TR_ResolvedMethod * callerResolvedMethod, TR_ResolvedMethod * calleeResolvedMethod,
TR::Node *callNode, bool allConsts)
{
if (alwaysWorthInlining(calleeResolvedMethod, callNode))
return false;
heuristicTrace(tracer(),"### Checking inliner base sizeThreshold. bytecodeSize = %d, block = %p, numLocals = %p,"
"callerResolvedMethod = %s, calleeResolvedMethod = %s",
bytecodeSize, block,numLocals,tracer()->traceSignature(callerResolvedMethod),
tracer()->traceSignature(calleeResolvedMethod));
int32_t blockFrequency = 0;
int32_t borderFrequency;
int32_t coldBorderFrequency; // only used in TR_MultipleCallTargetInliner::exceedsSizeThreshold (to date)
getBorderFrequencies(borderFrequency, coldBorderFrequency, calleeResolvedMethod, callNode);
OMR_InlinerPolicy *inlinerPolicy = getPolicy();
if (block)
{
blockFrequency = comp()->convertNonDeterministicInput(block->getFrequency(), MAX_BLOCK_COUNT + MAX_COLD_BLOCK_COUNT, randomGenerator(), 0);
if (allowBiggerMethods())
{
static const char * p = feGetEnv("TR_HotBorderFrequency");
if (p)
{
borderFrequency = atoi(p);
}
if (blockFrequency > borderFrequency)
{
int32_t oldSize = 0;
if (comp()->trace(OMR::inlining))
oldSize = bytecodeSize;
bytecodeSize = scaleSizeBasedOnBlockFrequency(bytecodeSize, blockFrequency, borderFrequency, calleeResolvedMethod, callNode);
if (comp()->trace(OMR::inlining))
heuristicTrace(tracer(),"exceedsSizeThreshold: Scaled down size for call block_%d from %d to %d", block->getNumber(), oldSize, bytecodeSize);
}
}
}
else if (getPolicy()->aggressiveSmallAppOpts())
{
getUtil()->adjustByteCodeSize(calleeResolvedMethod, _isInLoop, block, bytecodeSize);
}
else
{
if (comp()->trace(OMR::inlining))
heuristicTrace(tracer(),"exceedsSizeThreshold: No block passed in");
}
int32_t inlineThreshold = _methodByteCodeSizeThreshold;
if (comp()->isServerInlining())
{
if (blockFrequency > borderFrequency)
inlineThreshold = 200;
}
// reduce size if your args are consts
if (callNode)
{
heuristicTrace(tracer(),"In ExceedsSizeThreshold. Reducing size from %d",bytecodeSize);
int32_t originalbcSize = bytecodeSize;
uint32_t numArgs = callNode->getNumChildren();
bool allconstsfromNode = true;
uint32_t i = callNode->getFirstArgumentIndex();
if ( callNode->getOpCode().isCall() &&
!callNode->getSymbolReference()->isUnresolved() &&
callNode->getSymbolReference()->getSymbol()->getMethodSymbol() &&
!callNode->getSymbolReference()->getSymbol()->castToMethodSymbol()->isHelper() &&
!callNode->getSymbolReference()->getSymbol()->castToMethodSymbol()->isSystemLinkageDispatch() &&
!callNode->getSymbolReference()->getSymbol()->castToMethodSymbol()->isStatic() )
++i;
uint32_t numConstArgs=0;
uint32_t numNonConstArgs=0;
for (; i < numArgs; ++i)
{
// printf("callNode = %p\n");fflush(stdout);
// printf("callNode->getOpCode().isCall() = %p\n");fflush(stdout);
// printf("callNode->getSymbolReference() = %p\n");fflush(stdout);
TR::Node * arg = callNode->getChild(i);
if (arg->getOpCode().isLoadConst())
{
heuristicTrace(tracer(),"Node %p is load const\n",arg);
bytecodeSize = bytecodeSize - (bytecodeSize/10);
++numConstArgs;
}
else if (arg->getOpCodeValue() == TR::aload && arg->getSymbolReference()->getSymbol()->isConstObjectRef())
{
heuristicTrace(tracer(),"Node %p is aload const\n",arg);
bytecodeSize = bytecodeSize - (bytecodeSize/10);
++numConstArgs;
}
else
{
heuristicTrace(tracer(),"Node %p is not const\n",arg);
allconstsfromNode = false;
++numNonConstArgs;
}
}
if (!allconstsfromNode)
{
if ( _isInLoop && originalbcSize > inlineThreshold)
{
if (numConstArgs > 0 && (numConstArgs + numNonConstArgs) > 0 )
bytecodeSize = (numConstArgs * originalbcSize) / (numConstArgs + numNonConstArgs) ;
}
else
bytecodeSize = originalbcSize;
}
else if ( bytecodeSize < originalbcSize && originalbcSize > 100)
{
}
heuristicTrace(tracer()," to %d because of const arguments",bytecodeSize);
}
else if (allConsts)
{
heuristicTrace(tracer(), "In ExceedsSizeThreshold. Reducing size from %d", bytecodeSize);
int32_t originalbcSize = bytecodeSize;
int32_t numArgs = calleeResolvedMethod->numberOfExplicitParameters();
for (int32_t i=0 ; i < numArgs; ++i)
{
bytecodeSize = bytecodeSize - (bytecodeSize / 10);
}
heuristicTrace(tracer()," to %d because of const arguments",bytecodeSize);
}
if (inlineThreshold && (uint32_t)bytecodeSize > inlineThreshold)
{
TR::Options::INLINE_calleeToBig ++;
TR::Options::INLINE_calleeToBigSum += bytecodeSize;
if (block)
{
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes", block->getFirstRealTreeTop());
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes:#bytecodeSize", block->getFirstRealTreeTop(), bytecodeSize);
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes:#excess", block->getFirstRealTreeTop(), bytecodeSize - inlineThreshold);
TR::DebugCounter::prependDebugCounter(comp(), "inliner.callSites/failed/calleeHasTooManyBytecodes:#localsInCallee", block->getFirstRealTreeTop(), numLocals);
}
heuristicTrace(tracer(),"### Exceeding size threshold because bytecodeSize %d > inlineThreshold %d ",bytecodeSize, inlineThreshold);
return true; // Exceeds size threshold
}
heuristicTrace(tracer(),"### Did not exceed size threshold, bytecodeSize %d <= inlineThreshold %d ",bytecodeSize, inlineThreshold);
return false; // Does not exceed threshold
}
void
TR_InlinerBase::createParmMap(TR::ResolvedMethodSymbol *calleeSymbol, TR_LinkHead<TR_ParameterMapping> &map)
{
ListIterator<TR::ParameterSymbol> parms(&calleeSymbol->getParameterList());
for (TR::ParameterSymbol * p = parms.getFirst(); p; p = parms.getNext())
{
int32_t offset = p->getParameterOffset();
TR_ParameterMapping* currPM = map.getFirst(), * prevPM = 0;
for (; currPM && offset > currPM->_parmSymbol->getParameterOffset(); prevPM = currPM, currPM = currPM->getNext())
;
map.insertAfter(prevPM, new (trStackMemory()) TR_ParameterMapping(p));
}
}
bool
TR_InlinerBase::inlineRecognizedMethod(TR::RecognizedMethod method)
{
return getPolicy()->inlineRecognizedMethod(method);
}
bool
OMR_InlinerPolicy::inlineRecognizedMethod(TR::RecognizedMethod method)
{
return false;
}
// only dumbinliner uses this and includes checking for variable initialization
bool
TR_DumbInliner::tryToInline(char *message, TR_CallTarget *calltarget)
{
TR_ResolvedMethod *method = calltarget->_calleeSymbol->getResolvedMethod();
if (getPolicy()->tryToInline(calltarget,NULL,true))
{
if (comp()->trace(OMR::inlining))
traceMsg(comp(), "tryToInline pattern matched; %s for %s\n", message, method->signature(comp()->trMemory()));
return true;
}
return false;
}
//general tryToInline methods
bool
OMR_InlinerPolicy::tryToInlineGeneral(TR_CallTarget * calltarget, TR_CallStack * callStack, bool toInline)
{
const char * signature = calltarget->_calleeMethod->signature(comp()->trMemory());
TR::SimpleRegex * regex = NULL;
if (toInline)
regex=comp()->getOptions()->getTryToInline();
else
regex=comp()->getOptions()->getDontInline();
if (regex && TR::SimpleRegex::match(regex, calltarget->_calleeMethod))
{
if (comp()->trace(OMR::inlining))
{
traceMsg(comp(), toInline?"Inliner: tryToInline pattern matched, ":"Inliner: dontInline pattern matched, ");
traceMsg(comp(), "signature: %s\n", signature);
}
return true;
}
if (callStack && callStack->_inlineFilters)
{
TR_FilterBST *filterInfo = NULL;
TR::CompilationFilters * inlineFilters = NULL;
inlineFilters=callStack->_inlineFilters;
if (inlineFilters)
{
bool inclusive=comp()->getDebug()->methodSigCanBeFound(signature, inlineFilters, filterInfo,
calltarget->_calleeMethod->convertToMethod()->methodType());
if (filterInfo)
{
if (toInline && inclusive)
return true;
if (!toInline && !inclusive)
return true;
}
}
}
// consider the global dontInline
{
if (!toInline)
{
TR_FilterBST *filterInfo = NULL;
TR::CompilationFilters * inlineFilters = NULL;
if (TR::Options::getDebug())
{
inlineFilters=TR::Options::getDebug()->getInlineFilters();
}
if (inlineFilters)
{
bool inclusive=comp()->getDebug()->methodSigCanBeFound(signature, inlineFilters, filterInfo,
calltarget->_calleeMethod->convertToMethod()->methodType());
if (filterInfo)
{
if (!inclusive)
return true;
}
}
}
}
return false;
}
bool
OMR_InlinerPolicy::tryToInline(TR_CallTarget * calltarget, TR_CallStack * callStack, bool toInline)
{
return tryToInlineGeneral(calltarget, callStack, toInline);
}
//---------------------------------------------------------------------
// TR_CallStack
//---------------------------------------------------------------------
TR_CallStack::TR_CallStack(
TR::Compilation * c,
TR::ResolvedMethodSymbol * methodSymbol, TR_ResolvedMethod * method,
TR_CallStack * nextCallStack, int32_t maxCallSize, bool safeToAddSymRefs)
: TR_Link<TR_CallStack>(nextCallStack),
_comp(c), _trMemory(c->trMemory()),
_methodSymbol(methodSymbol),
_method(method),
_currentCallNode(NULL),
_maxCallSize(maxCallSize),
_inALoop(nextCallStack ? nextCallStack->_inALoop : 0),
_alwaysCalled(nextCallStack ? nextCallStack->_alwaysCalled : 0),
_autos(c->trMemory()),
_temps(c->trMemory()),
_injectedBasicBlockTemps(c->trMemory()),
_inlineFilters(NULL),
_blockInfo(0),
_safeToAddSymRefs(safeToAddSymRefs)
{
TR_FilterBST *filterInfo = NULL;
TR::CompilationFilters * inlineFilters = NULL;
if (!nextCallStack)
{
if (TR::Options::getDebug())
inlineFilters = TR::Options::getDebug()->getInlineFilters();
if (inlineFilters)
{
bool inclusive = comp()->getDebug()->methodSigCanBeFound(_method->signature(comp()->trMemory()), inlineFilters, filterInfo,
_method->convertToMethod()->methodType());
if (filterInfo)
{
if (!inclusive)
{
_inlineFilters = filterInfo->subGroup;
}
}
}
}
else
{
if (nextCallStack->_inlineFilters)
inlineFilters = nextCallStack->_inlineFilters;
if (inlineFilters)
{
bool inclusive = comp()->getDebug()->methodSigCanBeFound(_method->signature(comp()->trMemory()), inlineFilters, filterInfo,
_method->convertToMethod()->methodType());
if (filterInfo)
{
if (inclusive)
{
_inlineFilters = filterInfo->subGroup;
}
}
}
}
}
void TR_CallStack::commit()
{
ListIterator<TR::AutomaticSymbol> autos(&_autos);
ListIterator<TR::SymbolReference> temps(&_temps);
ListIterator<TR::SymbolReference> injectedBasicBlockTemps(&_injectedBasicBlockTemps);
TR::AutomaticSymbol * a = autos.getFirst();
TR::SymbolReference * temp = temps.getFirst();
TR::SymbolReference * injectedBasicBlockTemp = injectedBasicBlockTemps.getFirst();
if (getNext())
{
for (; a; a = autos.getNext())
getNext()->_autos.add(a);
for (; temp; temp = temps.getNext())
getNext()->_temps.add(temp);
for (; injectedBasicBlockTemp; injectedBasicBlockTemp = injectedBasicBlockTemps.getNext())
getNext()->_injectedBasicBlockTemps.add(injectedBasicBlockTemp);
}
else
{
TR_ASSERT(_methodSymbol, "_methodSymbol has not been set");
//TR_ASSERT(!temp, "temps should have been added by a call to makeTempsAvailable");
for (; a; a = autos.getNext())
_methodSymbol->addAutomatic(a);
for (; injectedBasicBlockTemp; injectedBasicBlockTemp = injectedBasicBlockTemps.getNext())
_methodSymbol->addAutomatic(injectedBasicBlockTemp->getSymbol()->castToAutoSymbol());
}
//to make an assert in the destructor work
_autos.deleteAll();
_temps.deleteAll();
_injectedBasicBlockTemps.deleteAll();
}
TR_CallStack::~TR_CallStack()
{
//::commit is supposed to clear up the lists after everything has been propagated to a caller
//if there are still some residual symRefs left it means that we missed a call to commit somewhere
#if !defined(AIXPPC)
TR_ASSERT(std::uncaught_exception() || (_autos.isEmpty() && _temps.isEmpty() && _injectedBasicBlockTemps.isEmpty()), "lists should have been emptied by TR_CallStack::commit");
#endif
}
void
TR_CallStack::addAutomatic(TR::AutomaticSymbol * a)
{
TR_ASSERT(_safeToAddSymRefs, "make sure a constructed callStack is committed then add _safeToAddSymRefs to your c-tor call");
_autos.add(a);
}
void
TR_CallStack::addTemp(TR::SymbolReference * temp)
{
TR_ASSERT(_safeToAddSymRefs, "make sure a constructed callStack is committed then add _safeToAddSymRefs to your c-tor call");
_temps.add(temp);
}
void
TR_CallStack::addInjectedBasicBlockTemp(TR::SymbolReference * temp)
{
TR_ASSERT(_safeToAddSymRefs, "make sure a constructed callStack is committed then add _safeToAddSymRefs to your c-tor call");
_injectedBasicBlockTemps.add(temp);
}
void
TR_CallStack::makeTempsAvailable(List<TR::SymbolReference> & availableTemps)
{
makeTempsAvailable(availableTemps, _temps);
}
void
TR_CallStack::makeBasicBlockTempsAvailable(List<TR::SymbolReference> & availableTemps)
{
makeTempsAvailable(availableTemps, _injectedBasicBlockTemps);
}
void
TR_CallStack::makeTempsAvailable(List<TR::SymbolReference> & availableTemps, List<TR::SymbolReference> & temps)
{
if (!getNext())
{
TR::SymbolReference * temp;
while ((temp = temps.popHead()))
{
_methodSymbol->addAutomatic(temp->getSymbol()->castToAutoSymbol());
availableTemps.add(temp);
}
}
}
TR_CallStack *
TR_CallStack::isCurrentlyOnTheStack(TR_ResolvedMethod * method, int32_t occurrences)
{
int32_t counter = 0;
for (TR_CallStack * cs = this; cs; cs = cs->getNext())
if (cs->_method->isSameMethod(method) && ++counter == occurrences)
return cs;
return 0;
}
bool
TR_CallStack::isAnywhereOnTheStack(TR_ResolvedMethod * method, int32_t occurrences)
{
int32_t counter = 0;
for (TR_CallStack * cs = this; cs; cs = cs->getNext())
{
if (cs->_method->isSameMethod(method) && ++counter == occurrences)
{
return true;
}
else if (cs->_currentCallNode)
{
for (int16_t callerIndex = cs->_currentCallNode->getByteCodeInfo().getCallerIndex(); callerIndex != -1; )
{
TR_InlinedCallSite &ics = _comp->getInlinedCallSite(callerIndex);
TR_ResolvedMethod *caller = _comp->getInlinedResolvedMethod(callerIndex);
if (caller->isSameMethod(method))
{
if (++counter == occurrences)
return true;
}
callerIndex = ics._byteCodeInfo.getCallerIndex();
}
}
}
return 0;
}