aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.9/gcc/params.def
blob: 3d2c913fd26db3c150ff39bc9345717d1eec4dfc (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
/* params.def - Run-time parameters.
   Copyright (C) 2001-2014 Free Software Foundation, Inc.
   Written by Mark Mitchell <mark@codesourcery.com>.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

/* This file contains definitions for language-independent
   parameters.  The DEFPARAM macro takes 6 arguments:

     - The enumeral corresponding to this parameter.

     - The name that can be used to set this parameter using the
       command-line option `--param <name>=<value>'.

     - A help string explaining how the parameter is used.

     - A default value for the parameter.

     - The minimum acceptable value for the parameter.

     - The maximum acceptable value for the parameter (if greater than
     the minimum).

   Be sure to add an entry to invoke.texi summarizing the parameter.  */

/* When branch is predicted to be taken with probability lower than this
   threshold (in percent), then it is considered well predictable. */
DEFPARAM (PARAM_PREDICTABLE_BRANCH_OUTCOME,
	  "predictable-branch-outcome",
	  "Maximal estimated outcome of branch considered predictable",
	  2, 0, 50)

DEFPARAM (PARAM_INLINE_MIN_SPEEDUP,
	  "inline-min-speedup",
	  "The minimal estimated speedup allowing inliner to ignore inline-insns-single and inline-isnsns-auto",
	  10, 0, 0)

/* The single function inlining limit. This is the maximum size
   of a function counted in internal gcc instructions (not in
   real machine instructions) that is eligible for inlining
   by the tree inliner.
   The default value is 450.
   Only functions marked inline (or methods defined in the class
   definition for C++) are affected by this.
   There are more restrictions to inlining: If inlined functions
   call other functions, the already inlined instructions are
   counted and once the recursive inline limit (see
   "max-inline-insns" parameter) is exceeded, the acceptable size
   gets decreased.  */
DEFPARAM (PARAM_MAX_INLINE_INSNS_SINGLE,
	  "max-inline-insns-single",
	  "The maximum number of instructions in a single function eligible for inlining",
	  400, 0, 0)

/* The single function inlining limit for functions that are
   inlined by virtue of -finline-functions (-O3).
   This limit should be chosen to be below or equal to the limit
   that is applied to functions marked inlined (or defined in the
   class declaration in C++) given by the "max-inline-insns-single"
   parameter.
   The default value is 40.  */
DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO,
	  "max-inline-insns-auto",
	  "The maximum number of instructions when automatically inlining",
	  40, 0, 0)

DEFPARAM (PARAM_MAX_GROWTH_AUTO_INLINE_FUNC,
	  "max-growth-auto-inline-func",
	  "The maximum size growth when inlining functions without inline declared in plain mode",
	  25, 0, 0)

DEFPARAM (PARAM_MAX_INLINE_INSNS_RECURSIVE,
	  "max-inline-insns-recursive",
	  "The maximum number of instructions inline function can grow to via recursive inlining",
	  450, 0, 0)

DEFPARAM (PARAM_MAX_INLINE_INSNS_RECURSIVE_AUTO,
	  "max-inline-insns-recursive-auto",
	  "The maximum number of instructions non-inline function can grow to via recursive inlining",
	  450, 0, 0)

DEFPARAM (PARAM_MAX_INLINE_RECURSIVE_DEPTH,
	  "max-inline-recursive-depth",
	  "The maximum depth of recursive inlining for inline functions",
	  8, 0, 0)

DEFPARAM (PARAM_MAX_INLINE_RECURSIVE_DEPTH_AUTO,
	  "max-inline-recursive-depth-auto",
	  "The maximum depth of recursive inlining for non-inline functions",
	  8, 0, 0)

DEFPARAM (PARAM_MIN_INLINE_RECURSIVE_PROBABILITY,
	  "min-inline-recursive-probability",
	  "Inline recursively only when the probability of call being executed exceeds the parameter",
	  10, 0, 0)

DEFPARAM (PARAM_INLINE_FUNCTION_OVERHEAD_SIZE,
	  "inline-function-overhead-size",
	  "Size estimate of function overhead (prologue/epilogue) for inlining purposes",
	  7, 0, 0)

/* Knob to control hot-caller heuristic. 0 means it is turned off, 1 means
   it is always applied, and 2 means it is applied only if the footprint is
   smaller than PARAM_HOT_CALLER_CODESIZE_THRESHOLD.  */
DEFPARAM (PARAM_INLINE_HOT_CALLER,
	  "inline-hot-caller",
	  "Consider cold callsites for inlining if caller contains hot code",
	  2, 0, 2)

/* The maximum code size estimate under which hot caller heuristic is
   applied.  */
DEFPARAM(PARAM_HOT_CALLER_CODESIZE_THRESHOLD,
	"hot-caller-codesize-threshold",
	"Maximum profile-based code size footprint estimate for "
	"hot caller heuristic  ",
	10000, 0, 0)

DEFPARAM (PARAM_INLINE_USEFUL_COLD_CALLEE,
	  "inline-useful-cold-callee",
	  "Only consider cold callsites for inlining if analysis estimates "
	  "downstream optimization opportunities",
	  1, 0, 1)

/* Limit of iterations of early inliner.  This basically bounds number of
   nested indirect calls early inliner can resolve.  Deeper chains are still
   handled by late inlining.  */
DEFPARAM (PARAM_EARLY_INLINER_MAX_ITERATIONS,
	  "max-early-inliner-iterations",
	  "The maximum number of nested indirect inlining performed by early inliner",
	  1, 0, 0)

/* Limit on probability of entry BB.  */
DEFPARAM (PARAM_COMDAT_SHARING_PROBABILITY,
	  "comdat-sharing-probability",
	  "Probability that COMDAT function will be shared with different compilation unit",
	  20, 0, 0)

/* Limit on probability of entry BB.  */
DEFPARAM (PARAM_PARTIAL_INLINING_ENTRY_PROBABILITY,
	  "partial-inlining-entry-probability",
	  "Maximum probability of the entry BB of split region (in percent relative to entry BB of the function) to make partial inlining happen",
	  70, 0, 0)

/* Limit the number of expansions created by the variable expansion
   optimization to avoid register pressure.  */
DEFPARAM (PARAM_MAX_VARIABLE_EXPANSIONS,
	  "max-variable-expansions-in-unroller",
	  "If -fvariable-expansion-in-unroller is used, the maximum number of times that an individual variable will be expanded during loop unrolling",
          1, 0, 0)

/* Limit loop autovectorization to loops with large enough iteration count.  */
DEFPARAM (PARAM_MIN_VECT_LOOP_BOUND,
	  "min-vect-loop-bound",
	  "If -ftree-vectorize is used, the minimal loop bound of a loop to be considered for vectorization",
	  1, 1, 0)

/* The maximum number of instructions to consider when looking for an
   instruction to fill a delay slot.  If more than this arbitrary
   number of instructions is searched, the time savings from filling
   the delay slot will be minimal so stop searching.  Increasing
   values mean more aggressive optimization, making the compile time
   increase with probably small improvement in executable run time.  */
DEFPARAM (PARAM_MAX_DELAY_SLOT_INSN_SEARCH,
	  "max-delay-slot-insn-search",
	  "The maximum number of instructions to consider to fill a delay slot",
	  100, 0, 0)

/* When trying to fill delay slots, the maximum number of instructions
   to consider when searching for a block with valid live register
   information.  Increasing this arbitrarily chosen value means more
   aggressive optimization, increasing the compile time.  This
   parameter should be removed when the delay slot code is rewritten
   to maintain the control-flow graph.  */
DEFPARAM(PARAM_MAX_DELAY_SLOT_LIVE_SEARCH,
	 "max-delay-slot-live-search",
	 "The maximum number of instructions to consider to find accurate live register information",
	 333, 0, 0)

/* This parameter limits the number of branch elements that the
   scheduler will track anti-dependencies through without resetting
   the tracking mechanism.  Large functions with few calls or barriers
   can generate lists containing many 1000's of dependencies.  Generally
   the compiler either uses all available memory, or runs for far too long.  */
DEFPARAM(PARAM_MAX_PENDING_LIST_LENGTH,
	 "max-pending-list-length",
	 "The maximum length of scheduling's pending operations list",
	 32, 0, 0)

/* This parameter limits the number of backtracking attempts when using the
   haifa scheduler for modulo scheduling.  */
DEFPARAM(PARAM_MAX_MODULO_BACKTRACK_ATTEMPTS,
	 "max-modulo-backtrack-attempts",
	 "The maximum number of backtrack attempts the scheduler should make when modulo scheduling a loop",
	 40, 0, 0)

DEFPARAM(PARAM_LARGE_FUNCTION_INSNS,
	 "large-function-insns",
	 "The size of function body to be considered large",
	 2700, 0, 0)
DEFPARAM(PARAM_LARGE_FUNCTION_GROWTH,
	 "large-function-growth",
	 "Maximal growth due to inlining of large function (in percent)",
	 100, 0, 0)
DEFPARAM(PARAM_LARGE_UNIT_INSNS,
	 "large-unit-insns",
	 "The size of translation unit to be considered large",
	 10000, 0, 0)
DEFPARAM(PARAM_INLINE_UNIT_GROWTH,
	 "inline-unit-growth",
	 "How much can given compilation unit grow because of the inlining (in percent)",
	 30, 0, 0)
DEFPARAM(PARAM_IPCP_UNIT_GROWTH,
	 "ipcp-unit-growth",
	 "How much can given compilation unit grow because of the interprocedural constant propagation (in percent)",
	 10, 0, 0)
DEFPARAM(PARAM_EARLY_INLINING_INSNS,
	 "early-inlining-insns",
	 "Maximal estimated growth of function body caused by early inlining of single call",
	 11, 0, 0)
DEFPARAM(PARAM_EARLY_INLINING_INSNS_ANY,
	 "early-inlining-insns-any",
	 "Early inline calls if growth does not exceed this limit",
	 0, 0, 0)
DEFPARAM(PARAM_EARLY_INLINING_INSNS_COMDAT,
	 "early-inlining-insns-comdat",
	 "Early inline calls to comdate functions if growth does not exceed this limit",
	 15, 0, 0)
DEFPARAM(PARAM_LARGE_STACK_FRAME,
	 "large-stack-frame",
	 "The size of stack frame to be considered large",
	 256, 0, 0)
DEFPARAM(PARAM_STACK_FRAME_GROWTH,
	 "large-stack-frame-growth",
	 "Maximal stack frame growth due to inlining (in percent)",
	 1000, 0, 0)

/* The GCSE optimization will be disabled if it would require
   significantly more memory than this value.  */
DEFPARAM(PARAM_MAX_GCSE_MEMORY,
	 "max-gcse-memory",
	 "The maximum amount of memory to be allocated by GCSE",
	 50 * 1024 * 1024, 0, 0)

/* The GCSE optimization of an expression will avoided if the ratio of
   insertions to deletions is greater than this value.  */
DEFPARAM(PARAM_MAX_GCSE_INSERTION_RATIO,
	 "max-gcse-insertion-ratio",
	 "The maximum ratio of insertions to deletions of expressions in GCSE",
	 20, 0, 0)

/* This is the threshold ratio when to perform partial redundancy
   elimination after reload. We perform partial redundancy elimination
   when the following holds:
   (Redundant load execution count)
   ------------------------------- >= GCSE_AFTER_RELOAD_PARTIAL_FRACTION
   (Added loads execution count)					  */
DEFPARAM(PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION,
	"gcse-after-reload-partial-fraction",
	"The threshold ratio for performing partial redundancy elimination after reload",
        3, 0, 0)
/* This is the threshold ratio of the critical edges execution count compared to
   the redundant loads execution count that permits performing the load
   redundancy elimination in gcse after reload.  */
DEFPARAM(PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION,
	"gcse-after-reload-critical-fraction",
	"The threshold ratio of critical edges execution count that permit performing redundancy elimination after reload",
        10, 0, 0)

/* GCSE will use GCSE_COST_DISTANCE_RATION as a scaling factor
   to calculate maximum distance for which an expression is allowed to move
   from its rtx_cost.  */
DEFPARAM(PARAM_GCSE_COST_DISTANCE_RATIO,
	 "gcse-cost-distance-ratio",
	 "Scaling factor in calculation of maximum distance an expression can be moved by GCSE optimizations",
	 10, 0, 0)
/* GCSE won't restrict distance for which an expression with rtx_cost greater
   than COSTS_N_INSN(GCSE_UNRESTRICTED_COST) is allowed to move.  */
DEFPARAM(PARAM_GCSE_UNRESTRICTED_COST,
	 "gcse-unrestricted-cost",
	 "Cost at which GCSE optimizations will not constraint the distance an expression can travel",
	 3, 0, 0)

/* How deep from a given basic block the dominator tree should be searched
   for expressions to hoist to the block.  The value of 0 will avoid limiting
   the search.  */
DEFPARAM(PARAM_MAX_HOIST_DEPTH,
	 "max-hoist-depth",
	 "Maximum depth of search in the dominator tree for expressions to hoist",
	 30, 0, 0)

/* This parameter limits the number of insns in a loop that will be unrolled,
   and by how much the loop is unrolled.

   This limit should be at most half of the peeling limits:  loop unroller
   decides to not unroll loops that iterate fewer than 2*number of allowed
   unrollings and thus we would have loops that are neither peeled or unrolled
   otherwise.  */
DEFPARAM(PARAM_MAX_UNROLLED_INSNS,
	 "max-unrolled-insns",
	 "The maximum number of instructions to consider to unroll in a loop",
	 200, 0, 0)
/* This parameter limits how many times the loop is unrolled depending
   on number of insns really executed in each iteration.  */
DEFPARAM(PARAM_MAX_AVERAGE_UNROLLED_INSNS,
	 "max-average-unrolled-insns",
	 "The maximum number of instructions to consider to unroll in a loop on average",
	 80, 0, 0)
/* The maximum number of unrollings of a single loop.  */
DEFPARAM(PARAM_MAX_UNROLL_TIMES,
	"max-unroll-times",
	"The maximum number of unrollings of a single loop",
	8, 0, 0)
/* The maximum number of insns of a peeled loop.  */
DEFPARAM(PARAM_MAX_PEELED_INSNS,
	"max-peeled-insns",
	"The maximum number of insns of a peeled loop",
	100, 0, 0)
/* The maximum number of peelings of a single loop.  */
DEFPARAM(PARAM_MAX_PEEL_TIMES,
	"max-peel-times",
	"The maximum number of peelings of a single loop",
	16, 0, 0)
/* The maximum number of peelings of a single loop that is peeled completely.  */
DEFPARAM(PARAM_MAX_PEEL_BRANCHES,
	"max-peel-branches",
	"The maximum number of branches on the path through the peeled sequence",
	32, 0, 0)
/* The maximum number of insns of a peeled loop.  */
DEFPARAM(PARAM_MAX_COMPLETELY_PEELED_INSNS,
	"max-completely-peeled-insns",
	"The maximum number of insns of a completely peeled loop",
	200, 0, 0)
/* The default maximum number of insns of a peeled loop, with -O2.  */
DEFPARAM(PARAM_MAX_DEFAULT_COMPLETELY_PEELED_INSNS,
	"max-default-completely-peeled-insns",
	"The maximum number of insns of a completely peeled loop",
	100, 0, 0)
/* The maximum number of peelings of a single loop that is peeled completely.  */
DEFPARAM(PARAM_MAX_COMPLETELY_PEEL_TIMES,
	"max-completely-peel-times",
	"The maximum number of peelings of a single loop that is peeled completely",
	16, 0, 0)
/* The maximum number of insns of a peeled loop that rolls only once.  */
DEFPARAM(PARAM_MAX_ONCE_PEELED_INSNS,
	"max-once-peeled-insns",
	"The maximum number of insns of a peeled loop that rolls only once",
	400, 0, 0)
/* The maximum depth of a loop nest we completely peel.  */
DEFPARAM(PARAM_MAX_UNROLL_ITERATIONS,
	 "max-completely-peel-loop-nest-depth",
	 "The maximum depth of a loop nest we completely peel",
	 8, 0, 0)
/* The maximum code size estimate under which loop unrolling and peeling
 * is allowed in a profile feedback compile. This currently applies to loops
 * with non-constant iteration counts and no floating point computations.  */
DEFPARAM(PARAM_UNROLLPEEL_CODESIZE_THRESHOLD,
	"unrollpeel-codesize-threshold",
	"Maximum profile-based code size footprint estimate for loop unrolling "
	"and peeling",
	15000, 0, 0)
/* The maximum ratio of total profiled execution counts to loop entry block
   count that must be exceeded to ignore most code size limits when unrolling
   and peeling.  */
DEFPARAM(PARAM_UNROLLPEEL_HOTNESS_THRESHOLD,
        "unrollpeel-hotness-threshold",
        "Maximum ratio of total profiled execution count to loop entry "
        "block count under which most codesize limits for unrolling and "
        "peeling will be ignored",
        100, 1, 0)

DEFPARAM(PARAM_MIN_ITER_UNROLL_WITH_BRANCHES,
	"min-iter-unroll-with-branches",
	"Minimum iteration count to ignore branch effects when unrolling",
	50, 0, 0)
DEFPARAM(PARAM_UNROLL_OUTER_LOOP_BRANCH_BUDGET,
	"unroll-outer-loop-branch-budget",
	"Maximum number of branches allowed in hot outer loop region after unroll",
	25, 0, 0)

/* The maximum number of insns of an unswitched loop.  */
DEFPARAM(PARAM_MAX_UNSWITCH_INSNS,
	"max-unswitch-insns",
	"The maximum number of insns of an unswitched loop",
	50, 0, 0)
/* The maximum level of recursion in unswitch_single_loop.  */
DEFPARAM(PARAM_MAX_UNSWITCH_LEVEL,
	"max-unswitch-level",
	"The maximum number of unswitchings in a single loop",
	3, 0, 0)

/* The maximum number of iterations of a loop the brute force algorithm
   for analysis of # of iterations of the loop tries to evaluate.  */
DEFPARAM(PARAM_MAX_ITERATIONS_TO_TRACK,
	"max-iterations-to-track",
	"Bound on the number of iterations the brute force # of iterations analysis algorithm evaluates",
	1000, 0, 0)
/* A cutoff to avoid costly computations of the number of iterations in
   the doloop transformation.  */
DEFPARAM(PARAM_MAX_ITERATIONS_COMPUTATION_COST,
	"max-iterations-computation-cost",
	"Bound on the cost of an expression to compute the number of iterations",
	10, 0, 0)

/* This parameter is used to tune SMS MAX II calculations.  */
DEFPARAM(PARAM_SMS_MAX_II_FACTOR,
	 "sms-max-ii-factor",
	 "A factor for tuning the upper bound that swing modulo scheduler uses for scheduling a loop",
	 100, 0, 0)
/* The minimum value of stage count that swing modulo scheduler will generate.  */
DEFPARAM(PARAM_SMS_MIN_SC,
        "sms-min-sc",
        "The minimum value of stage count that swing modulo scheduler will generate.",
        2, 1, 1)
DEFPARAM(PARAM_SMS_DFA_HISTORY,
	 "sms-dfa-history",
	 "The number of cycles the swing modulo scheduler considers when checking conflicts using DFA",
	 0, 0, 0)
DEFPARAM(PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD,
	 "sms-loop-average-count-threshold",
	 "A threshold on the average loop count considered by the swing modulo scheduler",
	 0, 0, 0)

DEFPARAM(HOT_BB_COUNT_WS_PERMILLE,
	 "hot-bb-count-ws-permille",
         "A basic block profile count is considered hot if it contributes to "
         "the given permillage of the entire profiled execution",
	 999, 0, 1000)
DEFPARAM(HOT_BB_FREQUENCY_FRACTION,
	 "hot-bb-frequency-fraction",
	 "Select fraction of the maximal frequency of executions of basic block in function given basic block needs to have to be considered hot",
	 1000, 0, 0)

DEFPARAM(UNLIKELY_BB_COUNT_FRACTION,
	 "unlikely-bb-count-fraction",
         "The minimum fraction of profile runs a given basic block execution count must be not to be considered unlikely",
	 20, 1, 10000)

DEFPARAM (PARAM_ALIGN_THRESHOLD,
	  "align-threshold",
	  "Select fraction of the maximal frequency of executions of basic block in function given basic block get alignment",
	  100, 1, 0)

DEFPARAM (PARAM_ALIGN_LOOP_ITERATIONS,
	  "align-loop-iterations",
	  "Loops iterating at least selected number of iterations will get loop alignement.",
	  4, 0, 0)

DEFPARAM (PARAM_ALIGN_LOOP_SIZE,
	  "align-loop-size",
	  "For loop small enough, try to align them more strictly.",
	  10, 0, 0)

/* For guessed profiles, the loops having unknown number of iterations
   are predicted to iterate relatively few (10) times at average.
   For functions containing one loop with large known number of iterations
   and other loops having unbounded loops we would end up predicting all
   the other loops cold that is not usually the case.  So we need to artificially
   flatten the profile.

   We need to cut the maximal predicted iterations to large enough iterations
   so the loop appears important, but safely within maximum hotness
   range.  */

DEFPARAM(PARAM_MAX_PREDICTED_ITERATIONS,
	 "max-predicted-iterations",
	 "The maximum number of loop iterations we predict statically",
	 100, 0, 0)

/* This parameter controls the maximum iterations that AutoFDO profile
   prpagation algorithm will run for a specific CFG.  */

DEFPARAM(PARAM_AUTOFDO_MAX_PROPAGATE_ITERATIONS,
         "max-autofdo-max-propagate-iterations",
         "The maximum number of AutoFDO profile propagation iterations",
         100, 0, 0)

/* This parameter controls the probability of builtin_expect. The default
   value is 90%. This empirical value is obtained through the weighted
   probability of FDO counters (with the FDO count value as the weight)
   in some real world programs:  
   (1) Google performance test benchmarks: the probability is 0.9081.
   (2) Linux 3.3 kernel running Google search workload: the probability
   is 0.8717.  */

DEFPARAM(BUILTIN_EXPECT_PROBABILITY,
	 "builtin-expect-probability",
	 "Set the estimated probability in percentage for builtin expect. The default value is 90% probability.",
	 90, 0, 100)
DEFPARAM(TRACER_DYNAMIC_COVERAGE_FEEDBACK,
	 "tracer-dynamic-coverage-feedback",
	 "The percentage of function, weighted by execution frequency, that must be covered by trace formation. Used when profile feedback is available",
	 95, 0, 100)
DEFPARAM(TRACER_DYNAMIC_COVERAGE,
	 "tracer-dynamic-coverage",
	 "The percentage of function, weighted by execution frequency, that must be covered by trace formation. Used when profile feedback is not available",
	 75, 0, 100)
DEFPARAM(TRACER_MAX_CODE_GROWTH,
	 "tracer-max-code-growth",
	 "Maximal code growth caused by tail duplication (in percent)",
	 100, 0, 0)
DEFPARAM(TRACER_MIN_BRANCH_RATIO,
	 "tracer-min-branch-ratio",
	 "Stop reverse growth if the reverse probability of best edge is less than this threshold (in percent)",
	 10, 0, 100)
DEFPARAM(TRACER_MIN_BRANCH_PROBABILITY_FEEDBACK,
	 "tracer-min-branch-probability-feedback",
	 "Stop forward growth if the probability of best edge is less than this threshold (in percent). Used when profile feedback is available",
	 80, 0, 100)
DEFPARAM(TRACER_MIN_BRANCH_PROBABILITY,
	 "tracer-min-branch-probability",
	 "Stop forward growth if the probability of best edge is less than this threshold (in percent). Used when profile feedback is not available",
	 50, 0, 100)

/* The maximum number of incoming edges to consider for crossjumping.  */
DEFPARAM(PARAM_MAX_CROSSJUMP_EDGES,
	 "max-crossjump-edges",
	 "The maximum number of incoming edges to consider for crossjumping",
	 100, 0, 0)

/* The minimum number of matching instructions to consider for crossjumping.  */
DEFPARAM(PARAM_MIN_CROSSJUMP_INSNS,
     "min-crossjump-insns",
     "The minimum number of matching instructions to consider for crossjumping",
     5, 1, 0)

/* The maximum number expansion factor when copying basic blocks.  */
DEFPARAM(PARAM_MAX_GROW_COPY_BB_INSNS,
     "max-grow-copy-bb-insns",
     "The maximum expansion factor when copying basic blocks",
     8, 0, 0)

/* The maximum number of insns to duplicate when unfactoring computed gotos.  */
DEFPARAM(PARAM_MAX_GOTO_DUPLICATION_INSNS,
     "max-goto-duplication-insns",
     "The maximum number of insns to duplicate when unfactoring computed gotos",
     8, 0, 0)

/* The maximum length of path considered in cse.  */
DEFPARAM(PARAM_MAX_CSE_PATH_LENGTH,
	 "max-cse-path-length",
	 "The maximum length of path considered in cse",
	 10, 1, 0)
DEFPARAM(PARAM_MAX_CSE_INSNS,
	 "max-cse-insns",
	 "The maximum instructions CSE process before flushing",
	 1000, 0, 0)

/* The cost of expression in loop invariant motion that is considered
   expensive.  */
DEFPARAM(PARAM_LIM_EXPENSIVE,
	 "lim-expensive",
	 "The minimum cost of an expensive expression in the loop invariant motion",
	 20, 0, 0)

/* Bound on number of candidates for induction variables below that
   all candidates are considered for each use in induction variable
   optimizations.  */

DEFPARAM(PARAM_IV_CONSIDER_ALL_CANDIDATES_BOUND,
	 "iv-consider-all-candidates-bound",
	 "Bound on number of candidates below that all candidates are considered in iv optimizations",
	 30, 0, 0)

/* The induction variable optimizations give up on loops that contain more
   induction variable uses.  */

DEFPARAM(PARAM_IV_MAX_CONSIDERED_USES,
	 "iv-max-considered-uses",
	 "Bound on number of iv uses in loop optimized in iv optimizations",
	 250, 0, 0)

/* If there are at most this number of ivs in the set, try removing unnecessary
   ivs from the set always.  */

DEFPARAM(PARAM_IV_ALWAYS_PRUNE_CAND_SET_BOUND,
	 "iv-always-prune-cand-set-bound",
	 "If number of candidates in the set is smaller, we always try to remove unused ivs during its optimization",
	 10, 0, 0)

DEFPARAM(PARAM_SCEV_MAX_EXPR_SIZE,
 	 "scev-max-expr-size",
	 "Bound on size of expressions used in the scalar evolutions analyzer",
	 100, 0, 0)

DEFPARAM(PARAM_SCEV_MAX_EXPR_COMPLEXITY,
	 "scev-max-expr-complexity",
	 "Bound on the complexity of the expressions in the scalar evolutions analyzer",
	 10, 0, 0)

DEFPARAM(PARAM_OMEGA_MAX_VARS,
 	 "omega-max-vars",
	 "Bound on the number of variables in Omega constraint systems",
	 128, 0, 0)

DEFPARAM(PARAM_OMEGA_MAX_GEQS,
 	 "omega-max-geqs",
	 "Bound on the number of inequalities in Omega constraint systems",
	 256, 0, 0)

DEFPARAM(PARAM_OMEGA_MAX_EQS,
 	 "omega-max-eqs",
	 "Bound on the number of equalities in Omega constraint systems",
	 128, 0, 0)

DEFPARAM(PARAM_OMEGA_MAX_WILD_CARDS,
 	 "omega-max-wild-cards",
	 "Bound on the number of wild cards in Omega constraint systems",
	 18, 0, 0)

DEFPARAM(PARAM_OMEGA_HASH_TABLE_SIZE,
 	 "omega-hash-table-size",
	 "Bound on the size of the hash table in Omega constraint systems",
	 550, 0, 0)

DEFPARAM(PARAM_OMEGA_MAX_KEYS,
 	 "omega-max-keys",
	 "Bound on the number of keys in Omega constraint systems",
	 500, 0, 0)

DEFPARAM(PARAM_OMEGA_ELIMINATE_REDUNDANT_CONSTRAINTS,
 	 "omega-eliminate-redundant-constraints",
	 "When set to 1, use expensive methods to eliminate all redundant constraints",
	 0, 0, 1)

DEFPARAM(PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS,
         "vect-max-version-for-alignment-checks",
         "Bound on number of runtime checks inserted by the vectorizer's loop versioning for alignment check",
         6, 0, 0)

DEFPARAM(PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS,
         "vect-max-version-for-alias-checks",
         "Bound on number of runtime checks inserted by the vectorizer's loop versioning for alias check",
         10, 0, 0)

DEFPARAM(PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT,
         "vect-max-peeling-for-alignment",
         "Max number of loop peels to enhancement alignment of data references in a loop",
         -1, -1, 64)

DEFPARAM(PARAM_MAX_CSELIB_MEMORY_LOCATIONS,
	 "max-cselib-memory-locations",
	 "The maximum memory locations recorded by cselib",
	 500, 0, 0)

#ifdef ENABLE_GC_ALWAYS_COLLECT
# define GGC_MIN_EXPAND_DEFAULT 0
# define GGC_MIN_HEAPSIZE_DEFAULT 0
#else
# define GGC_MIN_EXPAND_DEFAULT 30
# define GGC_MIN_HEAPSIZE_DEFAULT 4096
#endif

DEFPARAM(GGC_MIN_EXPAND,
	 "ggc-min-expand",
	 "Minimum heap expansion to trigger garbage collection, as a percentage of the total size of the heap",
	 GGC_MIN_EXPAND_DEFAULT, 0, 0)

DEFPARAM(GGC_MIN_HEAPSIZE,
	 "ggc-min-heapsize",
	 "Minimum heap size before we start collecting garbage, in kilobytes",
	 GGC_MIN_HEAPSIZE_DEFAULT, 0, 0)

#undef GGC_MIN_EXPAND_DEFAULT
#undef GGC_MIN_HEAPSIZE_DEFAULT

DEFPARAM(PARAM_MAX_RELOAD_SEARCH_INSNS,
	 "max-reload-search-insns",
	 "The maximum number of instructions to search backward when looking for equivalent reload",
	 100, 0, 0)

DEFPARAM(PARAM_SINK_FREQUENCY_THRESHOLD,
	 "sink-frequency-threshold",
	 "Target block's relative execution frequency (as a percentage) required to sink a statement",
	 75, 0, 100)

DEFPARAM(PARAM_MAX_SCHED_REGION_BLOCKS,
	 "max-sched-region-blocks",
	 "The maximum number of blocks in a region to be considered for interblock scheduling",
	 10, 0, 0)

DEFPARAM(PARAM_MAX_SCHED_REGION_INSNS,
	 "max-sched-region-insns",
	 "The maximum number of insns in a region to be considered for interblock scheduling",
	 100, 0, 0)

DEFPARAM(PARAM_MAX_PIPELINE_REGION_BLOCKS,
	 "max-pipeline-region-blocks",
	 "The maximum number of blocks in a region to be considered for interblock scheduling",
	 15, 0, 0)

DEFPARAM(PARAM_MAX_PIPELINE_REGION_INSNS,
	 "max-pipeline-region-insns",
	 "The maximum number of insns in a region to be considered for interblock scheduling",
	 200, 0, 0)

DEFPARAM(PARAM_MIN_SPEC_PROB,
         "min-spec-prob",
         "The minimum probability of reaching a source block for interblock speculative scheduling",
         40, 0, 0)

DEFPARAM(PARAM_MAX_SCHED_EXTEND_REGIONS_ITERS,
         "max-sched-extend-regions-iters",
         "The maximum number of iterations through CFG to extend regions",
         0, 0, 0)

DEFPARAM(PARAM_MAX_SCHED_INSN_CONFLICT_DELAY,
         "max-sched-insn-conflict-delay",
         "The maximum conflict delay for an insn to be considered for speculative motion",
         3, 1, 10)

DEFPARAM(PARAM_SCHED_SPEC_PROB_CUTOFF,
         "sched-spec-prob-cutoff",
         "The minimal probability of speculation success (in percents), so that speculative insn will be scheduled.",
         40, 0, 100)

DEFPARAM(PARAM_SCHED_STATE_EDGE_PROB_CUTOFF,
         "sched-state-edge-prob-cutoff",
         "The minimum probability an edge must have for the scheduler to save its state across it.",
         10, 0, 100)

DEFPARAM(PARAM_SELSCHED_MAX_LOOKAHEAD,
         "selsched-max-lookahead",
         "The maximum size of the lookahead window of selective scheduling",
         50, 0, 0)

DEFPARAM(PARAM_SELSCHED_MAX_SCHED_TIMES,
         "selsched-max-sched-times",
         "Maximum number of times that an insn could be scheduled",
         2, 0, 0)

DEFPARAM(PARAM_SELSCHED_INSNS_TO_RENAME,
         "selsched-insns-to-rename",
         "Maximum number of instructions in the ready list that are considered eligible for renaming",
         2, 0, 0)

DEFPARAM (PARAM_SCHED_MEM_TRUE_DEP_COST,
	  "sched-mem-true-dep-cost",
	  "Minimal distance between possibly conflicting store and load",
	  1, 0, 0)

DEFPARAM(PARAM_MAX_LAST_VALUE_RTL,
	 "max-last-value-rtl",
	 "The maximum number of RTL nodes that can be recorded as combiner's last value",
	 10000, 0, 0)

/* INTEGER_CST nodes are shared for values [{-1,0} .. N) for
   {signed,unsigned} integral types.  This determines N.
   Experimentation shows 251 to be a good value that generates the
   least amount of garbage for allocating the TREE_VEC storage.  */
DEFPARAM (PARAM_INTEGER_SHARE_LIMIT,
	  "integer-share-limit",
	  "The upper bound for sharing integer constants",
	  251, 2, 2)

DEFPARAM (PARAM_SSP_BUFFER_SIZE,
	  "ssp-buffer-size",
	  "The lower bound for a buffer to be considered for stack smashing protection",
	  8, 1, 0)

DEFPARAM (PARAM_MIN_SIZE_FOR_STACK_SHARING,
	  "min-size-for-stack-sharing",
	  "The minimum size of variables taking part in stack slot sharing "
	  "when not optimizing",
	  32, 0, 0)

/* When we thread through a block we have to make copies of the
   statements within the block.  Clearly for large blocks the code
   duplication is bad.

   PARAM_MAX_JUMP_THREAD_DUPLICATION_STMTS specifies the maximum number
   of statements and PHI nodes allowed in a block which is going to
   be duplicated for thread jumping purposes.

   Some simple analysis showed that more than 99% of the jump
   threading opportunities are for blocks with less than 15
   statements.  So we can get the benefits of jump threading
   without excessive code bloat for pathological cases with the
   throttle set at 15 statements.  */
DEFPARAM (PARAM_MAX_JUMP_THREAD_DUPLICATION_STMTS,
	  "max-jump-thread-duplication-stmts",
          "Maximum number of statements allowed in a block that needs to be duplicated when threading jumps",
	  15, 0, 0)

/* This is the maximum number of fields a variable may have before the pointer analysis machinery
   will stop trying to treat it in a field-sensitive manner.
   There are programs out there with thousands of fields per structure, and handling them
   field-sensitively is not worth the cost.  */
DEFPARAM (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
          "max-fields-for-field-sensitive",
	  "Maximum number of fields in a structure before pointer analysis treats the structure as a single variable",
	  0, 0, 0)

DEFPARAM(PARAM_MAX_SCHED_READY_INSNS,
	 "max-sched-ready-insns",
	 "The maximum number of instructions ready to be issued to be considered by the scheduler during the first scheduling pass",
	 100, 0, 0)

/* This is the maximum number of active local stores RTL DSE will consider.  */
DEFPARAM (PARAM_MAX_DSE_ACTIVE_LOCAL_STORES,
	  "max-dse-active-local-stores",
	  "Maximum number of active local stores in RTL dead store elimination",
	  5000, 0, 0)

/* Prefetching and cache-optimizations related parameters.  Default values are
   usually set by machine description.  */

/* The number of insns executed before prefetch is completed.  */

DEFPARAM (PARAM_PREFETCH_LATENCY,
	 "prefetch-latency",
	 "The number of insns executed before prefetch is completed",
	 200, 0, 0)

/* The number of prefetches that can run at the same time.  */

DEFPARAM (PARAM_SIMULTANEOUS_PREFETCHES,
	  "simultaneous-prefetches",
	  "The number of prefetches that can run at the same time",
	  3, 0, 0)

/* The size of L1 cache in kB.  */

DEFPARAM (PARAM_L1_CACHE_SIZE,
	  "l1-cache-size",
	  "The size of L1 cache",
	  64, 0, 0)

/* The size of L1 cache line in bytes.  */

DEFPARAM (PARAM_L1_CACHE_LINE_SIZE,
	  "l1-cache-line-size",
	  "The size of L1 cache line",
	  32, 0, 0)

/* The size of L2 cache in kB.  */

DEFPARAM (PARAM_L2_CACHE_SIZE,
	  "l2-cache-size",
	  "The size of L2 cache",
	  512, 0, 0)

/* Whether we should use canonical types rather than deep "structural"
   type checking.  Setting this value to 1 (the default) improves
   compilation performance in the C++ and Objective-C++ front end;
   this value should only be set to zero to work around bugs in the
   canonical type system by disabling it.  */

DEFPARAM (PARAM_USE_CANONICAL_TYPES,
	  "use-canonical-types",
	  "Whether to use canonical types",
	  1, 0, 1)

DEFPARAM (PARAM_MAX_PARTIAL_ANTIC_LENGTH,
	  "max-partial-antic-length",
	  "Maximum length of partial antic set when performing tree pre optimization",
	  100, 0, 0)

/* The following is used as a stop-gap limit for cases where really huge
   SCCs blow up memory and compile-time use too much.  If we hit this limit,
   SCCVN and such FRE and PRE will be not done at all for the current
   function.  */

DEFPARAM (PARAM_SCCVN_MAX_SCC_SIZE,
	  "sccvn-max-scc-size",
	  "Maximum size of a SCC before SCCVN stops processing a function",
	  10000, 10, 0)

/* The following is used as a stop-gap limit for cases where really huge
   functions blow up compile-time use too much.  It limits the number of
   alias-queries we do for finding common subexpressions for memory loads and
   stores.  The number of alias-queries is otherwise limited by the number of
   stores on paths to function entry.  */

DEFPARAM (PARAM_SCCVN_MAX_ALIAS_QUERIES_PER_ACCESS,
	  "sccvn-max-alias-queries-per-access",
	  "Maximum number of disambiguations to perform per memory access",
	  1000, 0, 0)

DEFPARAM (PARAM_IRA_MAX_LOOPS_NUM,
	  "ira-max-loops-num",
	  "Max loops number for regional RA",
	  100, 0, 0)

DEFPARAM (PARAM_IRA_MAX_CONFLICT_TABLE_SIZE,
	  "ira-max-conflict-table-size",
	  "Max size of conflict table in MB",
	  1000, 0, 0)

DEFPARAM (PARAM_IRA_LOOP_RESERVED_REGS,
	  "ira-loop-reserved-regs",
	  "The number of registers in each class kept unused by loop invariant motion",
	  2, 0, 0)

DEFPARAM (PARAM_LRA_MAX_CONSIDERED_RELOAD_PSEUDOS,
	  "lra-max-considered-reload-pseudos",
	  "The max number of reload pseudos which are considered during spilling a non-reload pseudo",
	  500, 0, 0)

/* Switch initialization conversion will refuse to create arrays that are
   bigger than this parameter times the number of switch branches.  */

DEFPARAM (PARAM_SWITCH_CONVERSION_BRANCH_RATIO,
	  "switch-conversion-max-branch-ratio",
	  "The maximum ratio between array size and switch branches for "
	  "a switch conversion to take place",
	  8, 1, 0)

/* Size of tiles when doing loop blocking.  */

DEFPARAM (PARAM_LOOP_BLOCK_TILE_SIZE,
	  "loop-block-tile-size",
	  "size of tiles for loop blocking",
	  51, 0, 0)

/* Maximal number of parameters that we allow in a SCoP.  */

DEFPARAM (PARAM_GRAPHITE_MAX_NB_SCOP_PARAMS,
	  "graphite-max-nb-scop-params",
	  "maximum number of parameters in a SCoP",
	  10, 0, 0)

/* Maximal number of basic blocks in the functions analyzed by Graphite.  */

DEFPARAM (PARAM_GRAPHITE_MAX_BBS_PER_FUNCTION,
	  "graphite-max-bbs-per-function",
	  "maximum number of basic blocks per function to be analyzed by Graphite",
	  100, 0, 0)

/* Avoid data dependence analysis on very large loops.  */
DEFPARAM (PARAM_LOOP_MAX_DATAREFS_FOR_DATADEPS,
	  "loop-max-datarefs-for-datadeps",
	  "Maximum number of datarefs in loop for building loop data dependencies",
	  1000, 0, 0)

/* Avoid doing loop invariant motion on very large loops.  */

DEFPARAM (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
	  "loop-invariant-max-bbs-in-loop",
	  "Max basic blocks number in loop for loop invariant motion",
	  10000, 0, 0)

/* Promote indirect call to conditional direct call only
   when the percentage of the target count over the total
   indirect call count is no smaller than the threshold.  */
DEFPARAM (PARAM_ICALL_PROMOTE_PERCENT_THRESHOLD,
	  "icall-promote-target-percent-threshold",
	  "percentage threshold for direct call promotion"
          " of a callee target",
	  30, 0, 100)

DEFPARAM (PARAM_ICALL_PROMOTE_COUNT_THRESHOLD,
	  "icall-promote-target_count-threshold",
	  "call count threshold for direct call promotion"
          " of a callee target",
	  1, 0, 0)

/* 0: do not always inline icall target:
   other value: always inline icall target when call count
   exceeds this value.
*/
DEFPARAM (PARAM_ALWAYS_INLINE_ICALL_TARGET,
	  "always-inline-icall-target",
	  "force inline indirect call target when promoted",
          0, 0, 0)

/* When the parameter is 1, use the internal function id
   to look up for profile data. Otherwise, use a more stable
   external id based on assembler name and source location. */
DEFPARAM (PARAM_PROFILE_FUNC_INTERNAL_ID,
	  "profile-func-internal-id",
	  "use internal function id in profile lookup",
          0, 0, 1)

/* Do not check the icall target count distribution, but use
   hotness info to decide if promotion should be done.  */
DEFPARAM (PARAM_ICALL_USE_HOTNESS_HEUR,
	  "icall-use-hotness-heur",
	  "use hotness based heuristics to match inliner",
          0, 0, 0)

/* Force the compiler to be in LIPO mode even there is no
 profile data available. -fripa is also needed. */
DEFPARAM (PARAM_FORCE_LIPO_MODE, 
	  "force-lipo",
	  "force LIPO compilation mode",
          0, 0, 1)

/* Limit max module group size in LIPO mode.  When the value
 is set to 0 (which is the default), there is no limit.  */
DEFPARAM (PARAM_MAX_LIPO_GROUP,
	  "max-lipo-group",
	  "maximum module group size.",
          0, 0, 10000)

/* In LIPO mode, stop processing any further auxiliary modules
   if current memory consumption exceeds this limit (in kb).  */
DEFPARAM (PARAM_MAX_LIPO_MEMORY,
	  "max-lipo-mem",
	  "don't import aux files if memory consumption exceeds this value",
	  4000000, 0, 0)

/* In LIPO profile-gen, use this parameter to record the cutoff value used at
   profile collection runtime.  */
DEFPARAM (PARAM_LIPO_CUTOFF,
	  "lipo-cutoff",
	  "The cutoff value of cumulative profile count. The value is between"
          "0-99. 100 is reserved as a special value indicating default cutoff" 
          "which is set at runtime. When the parameter is used and if its value"
          "is not 100, it overrides the dafault as well as the value set by the"
          " enviornment variable",
	  100, 0, 100)

/* In LIPO profile-gen, use this parameter to limit IPA inline.  */
DEFPARAM (PARAM_LIPO_SKIP_SPECIAL_SECTIONS,
	  "lipo-skip-special-sections",
          "In LIPO profile gen compilation, do not generate direct call "
          "profiling to functions marked with __attribute__((section(...))"
          "Those functions can not be inlined so there is no point tracking"
          "them.",
	  1, 0, 1)

/* In LIPO profile-gen, use this parameter to set random group generation
   seed value.  */
DEFPARAM (PARAM_LIPO_RANDOM_SEED,
	  "lipo-random-seed",
	  "random seed value used in random group testing",
	  0, 0, 0)

/* In LIPO profile-gen, use this parmaeter to set random group max size at profile
   collection runtime.  */
DEFPARAM (PARAM_LIPO_RANDOM_GROUP_SIZE,
	  "lipo-random-group-size",
	  "In LIPO random group testing, this parameter is used to set max group"
          " size. The default value is 0 which is treated specially and specifies"
          " no random grouping.",
	  0, 0, 300)

/* In LIPO profile-gen, use this parameter to specify the scale factor to propagate
   callee module groups to caller.  */
DEFPARAM (PARAM_LIPO_PROPAGATE_SCALE,
	  "lipo-propagate-scale",
	  "The scale factor to propagate callee module group's weight to the caller.",
	  100, 0, 100)

/* Choose different module grouping algorithms. This only affects
   LIPO profile-gen.  */
DEFPARAM (PARAM_LIPO_GROUPING_ALGORITHM,
	  "lipo-grouping-algorithm",
	  "Algorithm 0 uses the eager propagation algorithm."
	  "Algorithm 1 uses the inclusion_based priority algorithm."
	  "The default algorithm is 1.",
	  1, 0, 1)

/* In the inclusion_based_priority grouping algorithm, specify if we combine the
   the edges b/w modules.  */
DEFPARAM (PARAM_LIPO_MERGE_MODU_EDGES,
	  "lipo-merge-modu-edges",
	  "Default is 0 which not merge."
	  "If the value is 1, merge the edges.",
	  0, 0, 1)

/* In the inclusion_based_priority grouping algorithm, specify if we force
   strict inclusion of modules.  */
DEFPARAM (PARAM_LIPO_WEAK_INCLUSION,
	  "lipo-weak-inclusion",
	  "0: force strict inclusion; 1: weak inclusion."
	  "Default is 0.",
	  0, 0, 1)

/* Choose different COMDAT profile fixup algorithm.  This only affects
   LIPO profile-gen.  */
DEFPARAM (PARAM_LIPO_COMDAT_ALGORITHM,
	  "lipo-comdat-algorithm",
	  "Algorithm 0 performs no fixup."
	  "Algorithm 1 fixes up only indirect call profile targets."
	  "Algorithm 2 fixes up only missing counters."
	  "Algorithm 3 (1|2) fixes up both."
	  "The default algorithm is 3.",
	  3, 0, 3)

/* In LIPO profile-use, use this parameter to enable the dumping of module id
   in inline message.   */
DEFPARAM (PARAM_INLINE_DUMP_MODULE_ID,
	  "inline-dump-module-id",
	  "Default is 1. If the value is 0, dumping is disabled.",
	  1, 0, 1)

/* In LIPO profile-gen, use this parameter to enable cgraph dumping.   */
DEFPARAM (PARAM_LIPO_DUMP_CGRAPH,
	  "lipo-dump-cgraph",
	  "Default is 0. If the value is 1, text dump is used. If the value "
	  "is 2, .dot dump is enabled. ", 
	  0, 0, 2)

DEFPARAM (PARAM_PROFILE_GENERATE_SAMPLING_PERIOD,
         "profile-generate-sampling-period",
         "sampling rate with -fprofile-generate-sampling",
         100, 0, 2000000000)

DEFPARAM (PARAM_LIPO_SAMPLING_PERIOD,
         "lipo-sampling-period",
         "sampling rate for lipo direct call and indirect call profile",
         79, 0, 2000000000)

DEFPARAM (PARAM_PROFILE_VALUES_TIME,
         "profile-values-time",
         "Enable time profiling when value profiling",
         0, 0, 1)

DEFPARAM (PARAM_COVERAGE_CALLBACK,
         "coverage-callback",
         "callback a user-define function when for arc counter increments.",
         0, 0, 1)

DEFPARAM (PARAM_COVERAGE_EXEC_ONCE,
         "coverage-exec_once",
         "Stop incrementing arc counts once they become 1.",
         0, 0, 1)

/* Used for debugging purpose. Tell the compiler to find
   the gcda file in the current directory.  */
DEFPARAM (PARAM_GCOV_DEBUG,
	  "gcov-debug",
	  "Looking for gcda file in current dir.",
	  0, 0, 1)

/* Avoid SLP vectorization of large basic blocks.  */
DEFPARAM (PARAM_SLP_MAX_INSNS_IN_BB,
          "slp-max-insns-in-bb",
          "Maximum number of instructions in basic block to be considered for SLP vectorization",
          1000, 0, 0)

DEFPARAM (PARAM_MIN_INSN_TO_PREFETCH_RATIO,
	  "min-insn-to-prefetch-ratio",
	  "Min. ratio of insns to prefetches to enable prefetching for "
          "a loop with an unknown trip count",
	  9, 0, 0)

DEFPARAM (PARAM_PREFETCH_MIN_INSN_TO_MEM_RATIO,
	  "prefetch-min-insn-to-mem-ratio",
	  "Min. ratio of insns to mem ops to enable prefetching in a loop",
	  3, 0, 0)

/* Set maximum hash table size for var tracking.  */

DEFPARAM (PARAM_MAX_VARTRACK_SIZE,
	  "max-vartrack-size",
	  "Max. size of var tracking hash tables",
	  50000000, 0, 0)

/* Set maximum recursion depth for var tracking expression expansion
   and resolution.  */

DEFPARAM (PARAM_MAX_VARTRACK_EXPR_DEPTH,
	  "max-vartrack-expr-depth",
	  "Max. recursion depth for expanding var tracking expressions",
	  12, 0, 0)

/* Set maximum length of value location list for which var tracking
   should add reverse operations.  */

DEFPARAM (PARAM_MAX_VARTRACK_REVERSE_OP_SIZE,
	  "max-vartrack-reverse-op-size",
	  "Max. size of loc list for which reverse ops should be added",
	  50, 0, 0)

/* Set minimum insn uid for non-debug insns.  */

DEFPARAM (PARAM_MIN_NONDEBUG_INSN_UID,
	  "min-nondebug-insn-uid",
	  "The minimum UID to be used for a nondebug insn",
	  0, 1, 0)

DEFPARAM (PARAM_IPA_SRA_PTR_GROWTH_FACTOR,
	  "ipa-sra-ptr-growth-factor",
	  "Maximum allowed growth of size of new parameters ipa-sra replaces "
	  "a pointer to an aggregate with",
	  2, 0, 0)

DEFPARAM (PARAM_TM_MAX_AGGREGATE_SIZE,
	  "tm-max-aggregate-size",
	  "Size in bytes after which thread-local aggregates should be "
	  "instrumented with the logging functions instead of save/restore "
	  "pairs",
	  9, 0, 0)

DEFPARAM (PARAM_IPA_CP_VALUE_LIST_SIZE,
	  "ipa-cp-value-list-size",
	  "Maximum size of a list of values associated with each parameter for "
	  "interprocedural constant propagation",
	  8, 0, 0)

DEFPARAM (PARAM_IPA_CP_EVAL_THRESHOLD,
	  "ipa-cp-eval-threshold",
	  "Threshold ipa-cp opportunity evaluation that is still considered "
	  "beneficial to clone.",
	  500, 0, 0)

DEFPARAM (PARAM_IPA_MAX_AGG_ITEMS,
	  "ipa-max-agg-items",
	  "Maximum number of aggregate content items for a parameter in "
	  "jump functions and lattices",
	  16, 0, 0)

DEFPARAM (PARAM_IPA_CP_LOOP_HINT_BONUS,
	  "ipa-cp-loop-hint-bonus",
	  "Compile-time bonus IPA-CP assigns to candidates which make loop "
	  "bounds or strides known.",
	  64, 0, 0)

DEFPARAM (PARAM_IPA_CP_ARRAY_INDEX_HINT_BONUS,
	  "ipa-cp-array-index-hint-bonus",
	  "Compile-time bonus IPA-CP assigns to candidates which make an array "
	  "index known.",
	  48, 0, 0)

/* WHOPR partitioning configuration.  */

DEFPARAM (PARAM_LTO_PARTITIONS,
	  "lto-partitions",
	  "Number of partitions the program should be split to",
	  32, 1, 0)

DEFPARAM (MIN_PARTITION_SIZE,
	  "lto-min-partition",
	  "Minimal size of a partition for LTO (in estimated instructions)",
	  1000, 0, 0)

DEFPARAM (PARAM_MIN_MCF_CANCEL_ITERS,
	  "min-mcf-cancel-iters",
	  "the minimum number of iterations of negative cycle cancellation "
	  "in MCF",
	  10, 1, 0)

/* Diagnostic parameters.  */

DEFPARAM (CXX_MAX_NAMESPACES_FOR_DIAGNOSTIC_HELP,
	  "cxx-max-namespaces-for-diagnostic-help",
	  "Maximum number of namespaces to search for alternatives when "
	  "name lookup fails",
	  1000, 0, 0)


/* Only output those call graph edges in .gnu.callgraph.text sections
   whose count is greater than this value. */
DEFPARAM (PARAM_GNU_CGRAPH_SECTION_EDGE_THRESHOLD,
	  "gnu-cgraph-section-edge-threshold",
	  "minimum call graph edge count for inclusion in "
          ".gnu.callgraph.text section",
	  0, 0, 0)

/* Maximum number of conditional store pairs that can be sunk.  */
DEFPARAM (PARAM_MAX_STORES_TO_SINK,
          "max-stores-to-sink",
          "Maximum number of conditional store pairs that can be sunk",
          2, 0, 0)

/* Override CASE_VALUES_THRESHOLD of when to switch from doing switch
   statements via if statements to using a table jump operation.  If the value
   is 0, the default CASE_VALUES_THRESHOLD will be used.  */
DEFPARAM (PARAM_CASE_VALUES_THRESHOLD,
          "case-values-threshold",
          "The smallest number of different values for which it is best to "
	  "use a jump-table instead of a tree of conditional branches, "
	  "if 0, use the default for the machine",
          0, 0, 0)

/* Data race flags for C++0x memory model compliance.  */
DEFPARAM (PARAM_ALLOW_LOAD_DATA_RACES,
	  "allow-load-data-races",
	  "Allow new data races on loads to be introduced",
	  1, 0, 1)

DEFPARAM (PARAM_ALLOW_STORE_DATA_RACES,
	  "allow-store-data-races",
	  "Allow new data races on stores to be introduced",
	  1, 0, 1)

DEFPARAM (PARAM_ALLOW_PACKED_LOAD_DATA_RACES,
	  "allow-packed-load-data-races",
	  "Allow new data races on packed data loads to be introduced",
	  1, 0, 1)

DEFPARAM (PARAM_ALLOW_PACKED_STORE_DATA_RACES,
	  "allow-packed-store-data-races",
	  "Allow new data races on packed data stores to be introduced",
	  1, 0, 1)

/* Reassociation width to be used by tree reassoc optimization.  */
DEFPARAM (PARAM_TREE_REASSOC_WIDTH,
	  "tree-reassoc-width",
	  "Set the maximum number of instructions executed in parallel in "
	  "reassociated tree. If 0, use the target dependent heuristic.",
	  0, 0, 0)

DEFPARAM (PARAM_MAX_TAIL_MERGE_COMPARISONS,
          "max-tail-merge-comparisons",
          "Maximum amount of similar bbs to compare a bb with",
          10, 0, 0)

DEFPARAM (PARAM_MAX_TAIL_MERGE_ITERATIONS,
          "max-tail-merge-iterations",
          "Maximum amount of iterations of the pass over a function",
          2, 0, 0)

/* Maximum number of strings for which strlen optimization pass will
   track string lenths.  */
DEFPARAM (PARAM_MAX_TRACKED_STRLENS,
	  "max-tracked-strlens",
	  "Maximum number of strings for which strlen optimization pass will "
	  "track string lengths",
	  1000, 0, 0)

/* Keep this in sync with the sched_pressure_algorithm enum.  */
DEFPARAM (PARAM_SCHED_PRESSURE_ALGORITHM,
	  "sched-pressure-algorithm",
	  "Which -fsched-pressure algorithm to apply",
	  1, 1, 2)

/* Maximum length of candidate scans in straight-line strength reduction.  */
DEFPARAM (PARAM_MAX_SLSR_CANDIDATE_SCAN,
	  "max-slsr-cand-scan",
	  "Maximum length of candidate scans for straight-line "
	  "strength reduction",
	  50, 1, 999999)

/* Parameters to be used with -mpatch-functions-for-instrumentation.
   See config/i386/i386.opt  */
DEFPARAM (PARAM_FUNCTION_PATCH_MIN_INSTRUCTIONS,
          "function-patch-min-instructions",
          "Minimum number of instructions in the function without loop before "
          "the function is qualified for patching for instrumentation (for use "
          "with -mpatch-functions-for-instrumentation)",
          200, 0, 0)

DEFPARAM (PARAM_ASAN_STACK,
         "asan-stack",
         "Enable asan stack protection",
         1, 0, 1)

DEFPARAM (PARAM_ASAN_GLOBALS,
         "asan-globals",
         "Enable asan globals protection",
         1, 0, 1)

DEFPARAM (PARAM_ASAN_INSTRUMENT_WRITES,
         "asan-instrument-writes",
         "Enable asan store operations protection",
         1, 0, 1)

DEFPARAM (PARAM_ASAN_INSTRUMENT_READS,
         "asan-instrument-reads",
         "Enable asan load operations protection",
         1, 0, 1)

DEFPARAM (PARAM_ASAN_MEMINTRIN,
         "asan-memintrin",
         "Enable asan builtin functions protection",
         1, 0, 1)

DEFPARAM (PARAM_ASAN_USE_AFTER_RETURN,
         "asan-use-after-return",
         "Enable asan detection of use-after-return bugs",
         1, 0, 1)

DEFPARAM (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD,
         "asan-instrumentation-with-call-threshold",
         "Use callbacks instead of inline code if number of accesses "
         "in function becomes greater or equal to this number",
         INT_MAX, 0, INT_MAX)

DEFPARAM (PARAM_UNINIT_CONTROL_DEP_ATTEMPTS,
	  "uninit-control-dep-attempts",
	  "Maximum number of nested calls to search for control dependencies "
	  "during uninitialized variable analysis",
	  1000, 1, 0)

/* Fraction of adjusting fp setting cost in framepointer shrinkwrapping.  */
DEFPARAM (PARAM_FPSET_COST_FRACTION,
	  "fpset-cost-fraction",
	  "Adjust the estimation of fp setting insn cost with this fraction in"
	  "framepointer shrinkwrapping",
	  10, 1, 100)

/* Fraction of promoting when choose to promote or not to promote fpset in
   framepointer shrinkwrapping.  */
DEFPARAM (PARAM_FPSET_PROMOTE_FRACTION,
	  "fpset-promote-fraction",
	  "Adjust the estimation of fpset promotion cost with this fraction in"
	  "framepointer shrinkwrapping",
	  1, 0, 100)

/*

Local variables:
mode:c
End:
*/