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
|
-----------------------------------------------------------------------------
--
-- Object-file symbols (called CLabel for histerical raisins).
--
-- (c) The University of Glasgow 2004-2006
--
-----------------------------------------------------------------------------
module CLabel (
CLabel, -- abstract type
ForeignLabelSource(..),
pprDebugCLabel,
mkClosureLabel,
mkSRTLabel,
mkTopSRTLabel,
mkInfoTableLabel,
mkEntryLabel,
mkSlowEntryLabel,
mkConEntryLabel,
mkStaticConEntryLabel,
mkRednCountsLabel,
mkConInfoTableLabel,
mkStaticInfoTableLabel,
mkLargeSRTLabel,
mkApEntryLabel,
mkApInfoTableLabel,
mkClosureTableLabel,
mkLocalClosureLabel,
mkLocalInfoTableLabel,
mkLocalEntryLabel,
mkLocalConEntryLabel,
mkLocalStaticConEntryLabel,
mkLocalConInfoTableLabel,
mkLocalStaticInfoTableLabel,
mkLocalClosureTableLabel,
mkReturnPtLabel,
mkReturnInfoLabel,
mkAltLabel,
mkDefaultLabel,
mkBitmapLabel,
mkStringLitLabel,
mkAsmTempLabel,
mkPlainModuleInitLabel,
mkSplitMarkerLabel,
mkDirty_MUT_VAR_Label,
mkUpdInfoLabel,
mkBHUpdInfoLabel,
mkIndStaticInfoLabel,
mkMainCapabilityLabel,
mkMAP_FROZEN_infoLabel,
mkMAP_DIRTY_infoLabel,
mkEMPTY_MVAR_infoLabel,
mkTopTickyCtrLabel,
mkCAFBlackHoleInfoTableLabel,
mkCAFBlackHoleEntryLabel,
mkRtsPrimOpLabel,
mkRtsSlowFastTickyCtrLabel,
mkSelectorInfoLabel,
mkSelectorEntryLabel,
mkCmmInfoLabel,
mkCmmEntryLabel,
mkCmmRetInfoLabel,
mkCmmRetLabel,
mkCmmCodeLabel,
mkCmmDataLabel,
mkCmmClosureLabel,
mkRtsApFastLabel,
mkPrimCallLabel,
mkForeignLabel,
addLabelSize,
foreignLabelStdcallInfo,
mkCCLabel, mkCCSLabel,
DynamicLinkerLabelInfo(..),
mkDynamicLinkerLabel,
dynamicLinkerLabelInfo,
mkPicBaseLabel,
mkDeadStripPreventer,
mkHpcTicksLabel,
hasCAF,
needsCDecl, isAsmTemp, maybeAsmTemp, externallyVisibleCLabel,
isMathFun,
isCFunctionLabel, isGcPtrLabel, labelDynamic,
-- * Conversions
toClosureLbl, toSlowEntryLbl, toEntryLbl, toInfoLbl, toRednCountsLbl, hasHaskellName,
pprCLabel
) where
import IdInfo
import BasicTypes
import Packages
import Module
import Name
import Unique
import PrimOp
import Config
import CostCentre
import Outputable
import FastString
import DynFlags
import Platform
import UniqSet
-- -----------------------------------------------------------------------------
-- The CLabel type
{-
| CLabel is an abstract type that supports the following operations:
- Pretty printing
- In a C file, does it need to be declared before use? (i.e. is it
guaranteed to be already in scope in the places we need to refer to it?)
- If it needs to be declared, what type (code or data) should it be
declared to have?
- Is it visible outside this object file or not?
- Is it "dynamic" (see details below)
- Eq and Ord, so that we can make sets of CLabels (currently only
used in outputting C as far as I can tell, to avoid generating
more than one declaration for any given label).
- Converting an info table label into an entry label.
-}
data CLabel
= -- | A label related to the definition of a particular Id or Con in a .hs file.
IdLabel
Name
CafInfo
IdLabelInfo -- encodes the suffix of the label
-- | A label from a .cmm file that is not associated with a .hs level Id.
| CmmLabel
PackageId -- what package the label belongs to.
FastString -- identifier giving the prefix of the label
CmmLabelInfo -- encodes the suffix of the label
-- | A label with a baked-in \/ algorithmically generated name that definitely
-- comes from the RTS. The code for it must compile into libHSrts.a \/ libHSrts.so
-- If it doesn't have an algorithmically generated name then use a CmmLabel
-- instead and give it an appropriate PackageId argument.
| RtsLabel
RtsLabelInfo
-- | A 'C' (or otherwise foreign) label.
--
| ForeignLabel
FastString -- name of the imported label.
(Maybe Int) -- possible '@n' suffix for stdcall functions
-- When generating C, the '@n' suffix is omitted, but when
-- generating assembler we must add it to the label.
ForeignLabelSource -- what package the foreign label is in.
FunctionOrData
-- | A family of labels related to a particular case expression.
| CaseLabel
{-# UNPACK #-} !Unique -- Unique says which case expression
CaseLabelInfo
| AsmTempLabel
{-# UNPACK #-} !Unique
| StringLitLabel
{-# UNPACK #-} !Unique
| PlainModuleInitLabel -- without the version & way info
Module
| CC_Label CostCentre
| CCS_Label CostCentreStack
-- | These labels are generated and used inside the NCG only.
-- They are special variants of a label used for dynamic linking
-- see module PositionIndependentCode for details.
| DynamicLinkerLabel DynamicLinkerLabelInfo CLabel
-- | This label is generated and used inside the NCG only.
-- It is used as a base for PIC calculations on some platforms.
-- It takes the form of a local numeric assembler label '1'; and
-- is pretty-printed as 1b, referring to the previous definition
-- of 1: in the assembler source file.
| PicBaseLabel
-- | A label before an info table to prevent excessive dead-stripping on darwin
| DeadStripPreventer CLabel
-- | Per-module table of tick locations
| HpcTicksLabel Module
-- | Static reference table
| SRTLabel !Unique
-- | Label of an StgLargeSRT
| LargeSRTLabel
{-# UNPACK #-} !Unique
-- | A bitmap (function or case return)
| LargeBitmapLabel
{-# UNPACK #-} !Unique
deriving (Eq, Ord)
-- | Record where a foreign label is stored.
data ForeignLabelSource
-- | Label is in a named package
= ForeignLabelInPackage PackageId
-- | Label is in some external, system package that doesn't also
-- contain compiled Haskell code, and is not associated with any .hi files.
-- We don't have to worry about Haskell code being inlined from
-- external packages. It is safe to treat the RTS package as "external".
| ForeignLabelInExternalPackage
-- | Label is in the package currenly being compiled.
-- This is only used for creating hacky tmp labels during code generation.
-- Don't use it in any code that might be inlined across a package boundary
-- (ie, core code) else the information will be wrong relative to the
-- destination module.
| ForeignLabelInThisPackage
deriving (Eq, Ord)
-- | For debugging problems with the CLabel representation.
-- We can't make a Show instance for CLabel because lots of its components don't have instances.
-- The regular Outputable instance only shows the label name, and not its other info.
--
pprDebugCLabel :: CLabel -> SDoc
pprDebugCLabel lbl
= case lbl of
IdLabel{} -> ppr lbl <> (parens $ text "IdLabel")
CmmLabel pkg _name _info
-> ppr lbl <> (parens $ text "CmmLabel" <+> ppr pkg)
RtsLabel{} -> ppr lbl <> (parens $ text "RtsLabel")
ForeignLabel _name mSuffix src funOrData
-> ppr lbl <> (parens $ text "ForeignLabel"
<+> ppr mSuffix
<+> ppr src
<+> ppr funOrData)
_ -> ppr lbl <> (parens $ text "other CLabel)")
data IdLabelInfo
= Closure -- ^ Label for closure
| SRT -- ^ Static reference table (TODO: could be removed
-- with the old code generator, but might be needed
-- when we implement the New SRT Plan)
| InfoTable -- ^ Info tables for closures; always read-only
| Entry -- ^ Entry point
| Slow -- ^ Slow entry point
| LocalInfoTable -- ^ Like InfoTable but not externally visible
| LocalEntry -- ^ Like Entry but not externally visible
| RednCounts -- ^ Label of place to keep Ticky-ticky info for this Id
| ConEntry -- ^ Constructor entry point
| ConInfoTable -- ^ Corresponding info table
| StaticConEntry -- ^ Static constructor entry point
| StaticInfoTable -- ^ Corresponding info table
| ClosureTable -- ^ Table of closures for Enum tycons
deriving (Eq, Ord)
data CaseLabelInfo
= CaseReturnPt
| CaseReturnInfo
| CaseAlt ConTag
| CaseDefault
deriving (Eq, Ord)
data RtsLabelInfo
= RtsSelectorInfoTable Bool{-updatable-} Int{-offset-} -- ^ Selector thunks
| RtsSelectorEntry Bool{-updatable-} Int{-offset-}
| RtsApInfoTable Bool{-updatable-} Int{-arity-} -- ^ AP thunks
| RtsApEntry Bool{-updatable-} Int{-arity-}
| RtsPrimOp PrimOp
| RtsApFast FastString -- ^ _fast versions of generic apply
| RtsSlowFastTickyCtr String
deriving (Eq, Ord)
-- NOTE: Eq on LitString compares the pointer only, so this isn't
-- a real equality.
-- | What type of Cmm label we're dealing with.
-- Determines the suffix appended to the name when a CLabel.CmmLabel
-- is pretty printed.
data CmmLabelInfo
= CmmInfo -- ^ misc rts info tabless, suffix _info
| CmmEntry -- ^ misc rts entry points, suffix _entry
| CmmRetInfo -- ^ misc rts ret info tables, suffix _info
| CmmRet -- ^ misc rts return points, suffix _ret
| CmmData -- ^ misc rts data bits, eg CHARLIKE_closure
| CmmCode -- ^ misc rts code
| CmmClosure -- ^ closures eg CHARLIKE_closure
| CmmPrimCall -- ^ a prim call to some hand written Cmm code
deriving (Eq, Ord)
data DynamicLinkerLabelInfo
= CodeStub -- MachO: Lfoo$stub, ELF: foo@plt
| SymbolPtr -- MachO: Lfoo$non_lazy_ptr, Windows: __imp_foo
| GotSymbolPtr -- ELF: foo@got
| GotSymbolOffset -- ELF: foo@gotoff
deriving (Eq, Ord)
-- -----------------------------------------------------------------------------
-- Constructing CLabels
-- -----------------------------------------------------------------------------
-- Constructing IdLabels
-- These are always local:
mkSlowEntryLabel :: Name -> CafInfo -> CLabel
mkSlowEntryLabel name c = IdLabel name c Slow
mkTopSRTLabel :: Unique -> CLabel
mkTopSRTLabel u = SRTLabel u
mkSRTLabel :: Name -> CafInfo -> CLabel
mkRednCountsLabel :: Name -> CLabel
mkSRTLabel name c = IdLabel name c SRT
mkRednCountsLabel name =
IdLabel name NoCafRefs RednCounts -- Note [ticky for LNE]
-- These have local & (possibly) external variants:
mkLocalClosureLabel :: Name -> CafInfo -> CLabel
mkLocalInfoTableLabel :: Name -> CafInfo -> CLabel
mkLocalEntryLabel :: Name -> CafInfo -> CLabel
mkLocalClosureTableLabel :: Name -> CafInfo -> CLabel
mkLocalClosureLabel name c = IdLabel name c Closure
mkLocalInfoTableLabel name c = IdLabel name c LocalInfoTable
mkLocalEntryLabel name c = IdLabel name c LocalEntry
mkLocalClosureTableLabel name c = IdLabel name c ClosureTable
mkClosureLabel :: Name -> CafInfo -> CLabel
mkInfoTableLabel :: Name -> CafInfo -> CLabel
mkEntryLabel :: Name -> CafInfo -> CLabel
mkClosureTableLabel :: Name -> CafInfo -> CLabel
mkLocalConInfoTableLabel :: CafInfo -> Name -> CLabel
mkLocalConEntryLabel :: CafInfo -> Name -> CLabel
mkLocalStaticInfoTableLabel :: CafInfo -> Name -> CLabel
mkLocalStaticConEntryLabel :: CafInfo -> Name -> CLabel
mkConInfoTableLabel :: Name -> CafInfo -> CLabel
mkStaticInfoTableLabel :: Name -> CafInfo -> CLabel
mkClosureLabel name c = IdLabel name c Closure
mkInfoTableLabel name c = IdLabel name c InfoTable
mkEntryLabel name c = IdLabel name c Entry
mkClosureTableLabel name c = IdLabel name c ClosureTable
mkLocalConInfoTableLabel c con = IdLabel con c ConInfoTable
mkLocalConEntryLabel c con = IdLabel con c ConEntry
mkLocalStaticInfoTableLabel c con = IdLabel con c StaticInfoTable
mkLocalStaticConEntryLabel c con = IdLabel con c StaticConEntry
mkConInfoTableLabel name c = IdLabel name c ConInfoTable
mkStaticInfoTableLabel name c = IdLabel name c StaticInfoTable
mkConEntryLabel :: Name -> CafInfo -> CLabel
mkStaticConEntryLabel :: Name -> CafInfo -> CLabel
mkConEntryLabel name c = IdLabel name c ConEntry
mkStaticConEntryLabel name c = IdLabel name c StaticConEntry
-- Constructing Cmm Labels
mkDirty_MUT_VAR_Label, mkSplitMarkerLabel, mkUpdInfoLabel,
mkBHUpdInfoLabel, mkIndStaticInfoLabel, mkMainCapabilityLabel,
mkMAP_FROZEN_infoLabel, mkMAP_DIRTY_infoLabel,
mkEMPTY_MVAR_infoLabel, mkTopTickyCtrLabel,
mkCAFBlackHoleInfoTableLabel, mkCAFBlackHoleEntryLabel :: CLabel
mkDirty_MUT_VAR_Label = mkForeignLabel (fsLit "dirty_MUT_VAR") Nothing ForeignLabelInExternalPackage IsFunction
mkSplitMarkerLabel = CmmLabel rtsPackageId (fsLit "__stg_split_marker") CmmCode
mkUpdInfoLabel = CmmLabel rtsPackageId (fsLit "stg_upd_frame") CmmInfo
mkBHUpdInfoLabel = CmmLabel rtsPackageId (fsLit "stg_bh_upd_frame" ) CmmInfo
mkIndStaticInfoLabel = CmmLabel rtsPackageId (fsLit "stg_IND_STATIC") CmmInfo
mkMainCapabilityLabel = CmmLabel rtsPackageId (fsLit "MainCapability") CmmData
mkMAP_FROZEN_infoLabel = CmmLabel rtsPackageId (fsLit "stg_MUT_ARR_PTRS_FROZEN0") CmmInfo
mkMAP_DIRTY_infoLabel = CmmLabel rtsPackageId (fsLit "stg_MUT_ARR_PTRS_DIRTY") CmmInfo
mkEMPTY_MVAR_infoLabel = CmmLabel rtsPackageId (fsLit "stg_EMPTY_MVAR") CmmInfo
mkTopTickyCtrLabel = CmmLabel rtsPackageId (fsLit "top_ct") CmmData
mkCAFBlackHoleInfoTableLabel = CmmLabel rtsPackageId (fsLit "stg_CAF_BLACKHOLE") CmmInfo
mkCAFBlackHoleEntryLabel = CmmLabel rtsPackageId (fsLit "stg_CAF_BLACKHOLE") CmmEntry
-----
mkCmmInfoLabel, mkCmmEntryLabel, mkCmmRetInfoLabel, mkCmmRetLabel,
mkCmmCodeLabel, mkCmmDataLabel, mkCmmClosureLabel
:: PackageId -> FastString -> CLabel
mkCmmInfoLabel pkg str = CmmLabel pkg str CmmInfo
mkCmmEntryLabel pkg str = CmmLabel pkg str CmmEntry
mkCmmRetInfoLabel pkg str = CmmLabel pkg str CmmRetInfo
mkCmmRetLabel pkg str = CmmLabel pkg str CmmRet
mkCmmCodeLabel pkg str = CmmLabel pkg str CmmCode
mkCmmDataLabel pkg str = CmmLabel pkg str CmmData
mkCmmClosureLabel pkg str = CmmLabel pkg str CmmClosure
-- Constructing RtsLabels
mkRtsPrimOpLabel :: PrimOp -> CLabel
mkRtsPrimOpLabel primop = RtsLabel (RtsPrimOp primop)
mkSelectorInfoLabel :: Bool -> Int -> CLabel
mkSelectorEntryLabel :: Bool -> Int -> CLabel
mkSelectorInfoLabel upd off = RtsLabel (RtsSelectorInfoTable upd off)
mkSelectorEntryLabel upd off = RtsLabel (RtsSelectorEntry upd off)
mkApInfoTableLabel :: Bool -> Int -> CLabel
mkApEntryLabel :: Bool -> Int -> CLabel
mkApInfoTableLabel upd off = RtsLabel (RtsApInfoTable upd off)
mkApEntryLabel upd off = RtsLabel (RtsApEntry upd off)
-- A call to some primitive hand written Cmm code
mkPrimCallLabel :: PrimCall -> CLabel
mkPrimCallLabel (PrimCall str pkg)
= CmmLabel pkg str CmmPrimCall
-- Constructing ForeignLabels
-- | Make a foreign label
mkForeignLabel
:: FastString -- name
-> Maybe Int -- size prefix
-> ForeignLabelSource -- what package it's in
-> FunctionOrData
-> CLabel
mkForeignLabel str mb_sz src fod
= ForeignLabel str mb_sz src fod
-- | Update the label size field in a ForeignLabel
addLabelSize :: CLabel -> Int -> CLabel
addLabelSize (ForeignLabel str _ src fod) sz
= ForeignLabel str (Just sz) src fod
addLabelSize label _
= label
-- | Get the label size field from a ForeignLabel
foreignLabelStdcallInfo :: CLabel -> Maybe Int
foreignLabelStdcallInfo (ForeignLabel _ info _ _) = info
foreignLabelStdcallInfo _lbl = Nothing
-- Constructing Large*Labels
mkLargeSRTLabel :: Unique -> CLabel
mkBitmapLabel :: Unique -> CLabel
mkLargeSRTLabel uniq = LargeSRTLabel uniq
mkBitmapLabel uniq = LargeBitmapLabel uniq
-- Constructin CaseLabels
mkReturnPtLabel :: Unique -> CLabel
mkReturnInfoLabel :: Unique -> CLabel
mkAltLabel :: Unique -> ConTag -> CLabel
mkDefaultLabel :: Unique -> CLabel
mkReturnPtLabel uniq = CaseLabel uniq CaseReturnPt
mkReturnInfoLabel uniq = CaseLabel uniq CaseReturnInfo
mkAltLabel uniq tag = CaseLabel uniq (CaseAlt tag)
mkDefaultLabel uniq = CaseLabel uniq CaseDefault
-- Constructing Cost Center Labels
mkCCLabel :: CostCentre -> CLabel
mkCCSLabel :: CostCentreStack -> CLabel
mkCCLabel cc = CC_Label cc
mkCCSLabel ccs = CCS_Label ccs
mkRtsApFastLabel :: FastString -> CLabel
mkRtsApFastLabel str = RtsLabel (RtsApFast str)
mkRtsSlowFastTickyCtrLabel :: String -> CLabel
mkRtsSlowFastTickyCtrLabel pat = RtsLabel (RtsSlowFastTickyCtr pat)
-- Constructing Code Coverage Labels
mkHpcTicksLabel :: Module -> CLabel
mkHpcTicksLabel = HpcTicksLabel
-- Constructing labels used for dynamic linking
mkDynamicLinkerLabel :: DynamicLinkerLabelInfo -> CLabel -> CLabel
mkDynamicLinkerLabel = DynamicLinkerLabel
dynamicLinkerLabelInfo :: CLabel -> Maybe (DynamicLinkerLabelInfo, CLabel)
dynamicLinkerLabelInfo (DynamicLinkerLabel info lbl) = Just (info, lbl)
dynamicLinkerLabelInfo _ = Nothing
mkPicBaseLabel :: CLabel
mkPicBaseLabel = PicBaseLabel
-- Constructing miscellaneous other labels
mkDeadStripPreventer :: CLabel -> CLabel
mkDeadStripPreventer lbl = DeadStripPreventer lbl
mkStringLitLabel :: Unique -> CLabel
mkStringLitLabel = StringLitLabel
mkAsmTempLabel :: Uniquable a => a -> CLabel
mkAsmTempLabel a = AsmTempLabel (getUnique a)
mkPlainModuleInitLabel :: Module -> CLabel
mkPlainModuleInitLabel mod = PlainModuleInitLabel mod
-- -----------------------------------------------------------------------------
-- Convert between different kinds of label
toClosureLbl :: CLabel -> CLabel
toClosureLbl (IdLabel n c _) = IdLabel n c Closure
toClosureLbl (CmmLabel m str _) = CmmLabel m str CmmClosure
toClosureLbl l = pprPanic "toClosureLbl" (ppr l)
toSlowEntryLbl :: CLabel -> CLabel
toSlowEntryLbl (IdLabel n c _) = IdLabel n c Slow
toSlowEntryLbl l = pprPanic "toSlowEntryLbl" (ppr l)
toEntryLbl :: CLabel -> CLabel
toEntryLbl (IdLabel n c LocalInfoTable) = IdLabel n c LocalEntry
toEntryLbl (IdLabel n c ConInfoTable) = IdLabel n c ConEntry
toEntryLbl (IdLabel n c StaticInfoTable) = IdLabel n c StaticConEntry
toEntryLbl (IdLabel n c _) = IdLabel n c Entry
toEntryLbl (CaseLabel n CaseReturnInfo) = CaseLabel n CaseReturnPt
toEntryLbl (CmmLabel m str CmmInfo) = CmmLabel m str CmmEntry
toEntryLbl (CmmLabel m str CmmRetInfo) = CmmLabel m str CmmRet
toEntryLbl l = pprPanic "toEntryLbl" (ppr l)
toInfoLbl :: CLabel -> CLabel
toInfoLbl (IdLabel n c Entry) = IdLabel n c InfoTable
toInfoLbl (IdLabel n c LocalEntry) = IdLabel n c LocalInfoTable
toInfoLbl (IdLabel n c ConEntry) = IdLabel n c ConInfoTable
toInfoLbl (IdLabel n c StaticConEntry) = IdLabel n c StaticInfoTable
toInfoLbl (IdLabel n c _) = IdLabel n c InfoTable
toInfoLbl (CaseLabel n CaseReturnPt) = CaseLabel n CaseReturnInfo
toInfoLbl (CmmLabel m str CmmEntry) = CmmLabel m str CmmInfo
toInfoLbl (CmmLabel m str CmmRet) = CmmLabel m str CmmRetInfo
toInfoLbl l = pprPanic "CLabel.toInfoLbl" (ppr l)
toRednCountsLbl :: CLabel -> Maybe CLabel
toRednCountsLbl = fmap mkRednCountsLabel . hasHaskellName
hasHaskellName :: CLabel -> Maybe Name
hasHaskellName (IdLabel n _ _) = Just n
hasHaskellName _ = Nothing
-- -----------------------------------------------------------------------------
-- Does a CLabel's referent itself refer to a CAF?
hasCAF :: CLabel -> Bool
hasCAF (IdLabel _ _ RednCounts) = False -- Note [ticky for LNE]
hasCAF (IdLabel _ MayHaveCafRefs _) = True
hasCAF _ = False
-- Note [ticky for LNE]
-- ~~~~~~~~~~~~~~~~~~~~~
-- Until 14 Feb 2013, every ticky counter was associated with a
-- closure. Thus, ticky labels used IdLabel. It is odd that
-- CmmBuildInfoTables.cafTransfers would consider such a ticky label
-- reason to add the name to the CAFEnv (and thus eventually the SRT),
-- but it was harmless because the ticky was only used if the closure
-- was also.
--
-- Since we now have ticky counters for LNEs, it is no longer the case
-- that every ticky counter has an actual closure. So I changed the
-- generation of ticky counters' CLabels to not result in their
-- associated id ending up in the SRT.
--
-- NB IdLabel is still appropriate for ticky ids (as opposed to
-- CmmLabel) because the LNE's counter is still related to an .hs Id,
-- that Id just isn't for a proper closure.
-- -----------------------------------------------------------------------------
-- Does a CLabel need declaring before use or not?
--
-- See wiki:Commentary/Compiler/Backends/PprC#Prototypes
needsCDecl :: CLabel -> Bool
-- False <=> it's pre-declared; don't bother
-- don't bother declaring Bitmap labels, we always make sure
-- they are defined before use.
needsCDecl (SRTLabel _) = True
needsCDecl (LargeSRTLabel _) = False
needsCDecl (LargeBitmapLabel _) = False
needsCDecl (IdLabel _ _ _) = True
needsCDecl (CaseLabel _ _) = True
needsCDecl (PlainModuleInitLabel _) = True
needsCDecl (StringLitLabel _) = False
needsCDecl (AsmTempLabel _) = False
needsCDecl (RtsLabel _) = False
needsCDecl (CmmLabel pkgId _ _)
-- Prototypes for labels defined in the runtime system are imported
-- into HC files via includes/Stg.h.
| pkgId == rtsPackageId = False
-- For other labels we inline one into the HC file directly.
| otherwise = True
needsCDecl l@(ForeignLabel{}) = not (isMathFun l)
needsCDecl (CC_Label _) = True
needsCDecl (CCS_Label _) = True
needsCDecl (HpcTicksLabel _) = True
needsCDecl (DynamicLinkerLabel {}) = panic "needsCDecl DynamicLinkerLabel"
needsCDecl PicBaseLabel = panic "needsCDecl PicBaseLabel"
needsCDecl (DeadStripPreventer {}) = panic "needsCDecl DeadStripPreventer"
-- | Check whether a label is a local temporary for native code generation
isAsmTemp :: CLabel -> Bool
isAsmTemp (AsmTempLabel _) = True
isAsmTemp _ = False
-- | If a label is a local temporary used for native code generation
-- then return just its unique, otherwise nothing.
maybeAsmTemp :: CLabel -> Maybe Unique
maybeAsmTemp (AsmTempLabel uq) = Just uq
maybeAsmTemp _ = Nothing
-- | Check whether a label corresponds to a C function that has
-- a prototype in a system header somehere, or is built-in
-- to the C compiler. For these labels we avoid generating our
-- own C prototypes.
isMathFun :: CLabel -> Bool
isMathFun (ForeignLabel fs _ _ _) = fs `elementOfUniqSet` math_funs
isMathFun _ = False
math_funs :: UniqSet FastString
math_funs = mkUniqSet [
-- _ISOC99_SOURCE
(fsLit "acos"), (fsLit "acosf"), (fsLit "acosh"),
(fsLit "acoshf"), (fsLit "acoshl"), (fsLit "acosl"),
(fsLit "asin"), (fsLit "asinf"), (fsLit "asinl"),
(fsLit "asinh"), (fsLit "asinhf"), (fsLit "asinhl"),
(fsLit "atan"), (fsLit "atanf"), (fsLit "atanl"),
(fsLit "atan2"), (fsLit "atan2f"), (fsLit "atan2l"),
(fsLit "atanh"), (fsLit "atanhf"), (fsLit "atanhl"),
(fsLit "cbrt"), (fsLit "cbrtf"), (fsLit "cbrtl"),
(fsLit "ceil"), (fsLit "ceilf"), (fsLit "ceill"),
(fsLit "copysign"), (fsLit "copysignf"), (fsLit "copysignl"),
(fsLit "cos"), (fsLit "cosf"), (fsLit "cosl"),
(fsLit "cosh"), (fsLit "coshf"), (fsLit "coshl"),
(fsLit "erf"), (fsLit "erff"), (fsLit "erfl"),
(fsLit "erfc"), (fsLit "erfcf"), (fsLit "erfcl"),
(fsLit "exp"), (fsLit "expf"), (fsLit "expl"),
(fsLit "exp2"), (fsLit "exp2f"), (fsLit "exp2l"),
(fsLit "expm1"), (fsLit "expm1f"), (fsLit "expm1l"),
(fsLit "fabs"), (fsLit "fabsf"), (fsLit "fabsl"),
(fsLit "fdim"), (fsLit "fdimf"), (fsLit "fdiml"),
(fsLit "floor"), (fsLit "floorf"), (fsLit "floorl"),
(fsLit "fma"), (fsLit "fmaf"), (fsLit "fmal"),
(fsLit "fmax"), (fsLit "fmaxf"), (fsLit "fmaxl"),
(fsLit "fmin"), (fsLit "fminf"), (fsLit "fminl"),
(fsLit "fmod"), (fsLit "fmodf"), (fsLit "fmodl"),
(fsLit "frexp"), (fsLit "frexpf"), (fsLit "frexpl"),
(fsLit "hypot"), (fsLit "hypotf"), (fsLit "hypotl"),
(fsLit "ilogb"), (fsLit "ilogbf"), (fsLit "ilogbl"),
(fsLit "ldexp"), (fsLit "ldexpf"), (fsLit "ldexpl"),
(fsLit "lgamma"), (fsLit "lgammaf"), (fsLit "lgammal"),
(fsLit "llrint"), (fsLit "llrintf"), (fsLit "llrintl"),
(fsLit "llround"), (fsLit "llroundf"), (fsLit "llroundl"),
(fsLit "log"), (fsLit "logf"), (fsLit "logl"),
(fsLit "log10l"), (fsLit "log10"), (fsLit "log10f"),
(fsLit "log1pl"), (fsLit "log1p"), (fsLit "log1pf"),
(fsLit "log2"), (fsLit "log2f"), (fsLit "log2l"),
(fsLit "logb"), (fsLit "logbf"), (fsLit "logbl"),
(fsLit "lrint"), (fsLit "lrintf"), (fsLit "lrintl"),
(fsLit "lround"), (fsLit "lroundf"), (fsLit "lroundl"),
(fsLit "modf"), (fsLit "modff"), (fsLit "modfl"),
(fsLit "nan"), (fsLit "nanf"), (fsLit "nanl"),
(fsLit "nearbyint"), (fsLit "nearbyintf"), (fsLit "nearbyintl"),
(fsLit "nextafter"), (fsLit "nextafterf"), (fsLit "nextafterl"),
(fsLit "nexttoward"), (fsLit "nexttowardf"), (fsLit "nexttowardl"),
(fsLit "pow"), (fsLit "powf"), (fsLit "powl"),
(fsLit "remainder"), (fsLit "remainderf"), (fsLit "remainderl"),
(fsLit "remquo"), (fsLit "remquof"), (fsLit "remquol"),
(fsLit "rint"), (fsLit "rintf"), (fsLit "rintl"),
(fsLit "round"), (fsLit "roundf"), (fsLit "roundl"),
(fsLit "scalbln"), (fsLit "scalblnf"), (fsLit "scalblnl"),
(fsLit "scalbn"), (fsLit "scalbnf"), (fsLit "scalbnl"),
(fsLit "sin"), (fsLit "sinf"), (fsLit "sinl"),
(fsLit "sinh"), (fsLit "sinhf"), (fsLit "sinhl"),
(fsLit "sqrt"), (fsLit "sqrtf"), (fsLit "sqrtl"),
(fsLit "tan"), (fsLit "tanf"), (fsLit "tanl"),
(fsLit "tanh"), (fsLit "tanhf"), (fsLit "tanhl"),
(fsLit "tgamma"), (fsLit "tgammaf"), (fsLit "tgammal"),
(fsLit "trunc"), (fsLit "truncf"), (fsLit "truncl"),
-- ISO C 99 also defines these function-like macros in math.h:
-- fpclassify, isfinite, isinf, isnormal, signbit, isgreater,
-- isgreaterequal, isless, islessequal, islessgreater, isunordered
-- additional symbols from _BSD_SOURCE
(fsLit "drem"), (fsLit "dremf"), (fsLit "dreml"),
(fsLit "finite"), (fsLit "finitef"), (fsLit "finitel"),
(fsLit "gamma"), (fsLit "gammaf"), (fsLit "gammal"),
(fsLit "isinf"), (fsLit "isinff"), (fsLit "isinfl"),
(fsLit "isnan"), (fsLit "isnanf"), (fsLit "isnanl"),
(fsLit "j0"), (fsLit "j0f"), (fsLit "j0l"),
(fsLit "j1"), (fsLit "j1f"), (fsLit "j1l"),
(fsLit "jn"), (fsLit "jnf"), (fsLit "jnl"),
(fsLit "lgamma_r"), (fsLit "lgammaf_r"), (fsLit "lgammal_r"),
(fsLit "scalb"), (fsLit "scalbf"), (fsLit "scalbl"),
(fsLit "significand"), (fsLit "significandf"), (fsLit "significandl"),
(fsLit "y0"), (fsLit "y0f"), (fsLit "y0l"),
(fsLit "y1"), (fsLit "y1f"), (fsLit "y1l"),
(fsLit "yn"), (fsLit "ynf"), (fsLit "ynl")
]
-- -----------------------------------------------------------------------------
-- | Is a CLabel visible outside this object file or not?
-- From the point of view of the code generator, a name is
-- externally visible if it has to be declared as exported
-- in the .o file's symbol table; that is, made non-static.
externallyVisibleCLabel :: CLabel -> Bool -- not C "static"
externallyVisibleCLabel (CaseLabel _ _) = False
externallyVisibleCLabel (StringLitLabel _) = False
externallyVisibleCLabel (AsmTempLabel _) = False
externallyVisibleCLabel (PlainModuleInitLabel _)= True
externallyVisibleCLabel (RtsLabel _) = True
externallyVisibleCLabel (CmmLabel _ _ _) = True
externallyVisibleCLabel (ForeignLabel{}) = True
externallyVisibleCLabel (IdLabel name _ info) = isExternalName name && externallyVisibleIdLabel info
externallyVisibleCLabel (CC_Label _) = True
externallyVisibleCLabel (CCS_Label _) = True
externallyVisibleCLabel (DynamicLinkerLabel _ _) = False
externallyVisibleCLabel (HpcTicksLabel _) = True
externallyVisibleCLabel (LargeBitmapLabel _) = False
externallyVisibleCLabel (SRTLabel _) = False
externallyVisibleCLabel (LargeSRTLabel _) = False
externallyVisibleCLabel (PicBaseLabel {}) = panic "externallyVisibleCLabel PicBaseLabel"
externallyVisibleCLabel (DeadStripPreventer {}) = panic "externallyVisibleCLabel DeadStripPreventer"
externallyVisibleIdLabel :: IdLabelInfo -> Bool
externallyVisibleIdLabel SRT = False
externallyVisibleIdLabel LocalInfoTable = False
externallyVisibleIdLabel LocalEntry = False
externallyVisibleIdLabel _ = True
-- -----------------------------------------------------------------------------
-- Finding the "type" of a CLabel
-- For generating correct types in label declarations:
data CLabelType
= CodeLabel -- Address of some executable instructions
| DataLabel -- Address of data, not a GC ptr
| GcPtrLabel -- Address of a (presumably static) GC object
isCFunctionLabel :: CLabel -> Bool
isCFunctionLabel lbl = case labelType lbl of
CodeLabel -> True
_other -> False
isGcPtrLabel :: CLabel -> Bool
isGcPtrLabel lbl = case labelType lbl of
GcPtrLabel -> True
_other -> False
-- | Work out the general type of data at the address of this label
-- whether it be code, data, or static GC object.
labelType :: CLabel -> CLabelType
labelType (CmmLabel _ _ CmmData) = DataLabel
labelType (CmmLabel _ _ CmmClosure) = GcPtrLabel
labelType (CmmLabel _ _ CmmCode) = CodeLabel
labelType (CmmLabel _ _ CmmInfo) = DataLabel
labelType (CmmLabel _ _ CmmEntry) = CodeLabel
labelType (CmmLabel _ _ CmmPrimCall) = CodeLabel
labelType (CmmLabel _ _ CmmRetInfo) = DataLabel
labelType (CmmLabel _ _ CmmRet) = CodeLabel
labelType (RtsLabel (RtsSelectorInfoTable _ _)) = DataLabel
labelType (RtsLabel (RtsApInfoTable _ _)) = DataLabel
labelType (RtsLabel (RtsApFast _)) = CodeLabel
labelType (CaseLabel _ CaseReturnInfo) = DataLabel
labelType (CaseLabel _ _) = CodeLabel
labelType (PlainModuleInitLabel _) = CodeLabel
labelType (SRTLabel _) = DataLabel
labelType (LargeSRTLabel _) = DataLabel
labelType (LargeBitmapLabel _) = DataLabel
labelType (ForeignLabel _ _ _ IsFunction) = CodeLabel
labelType (IdLabel _ _ info) = idInfoLabelType info
labelType _ = DataLabel
idInfoLabelType :: IdLabelInfo -> CLabelType
idInfoLabelType info =
case info of
InfoTable -> DataLabel
LocalInfoTable -> DataLabel
Closure -> GcPtrLabel
ConInfoTable -> DataLabel
StaticInfoTable -> DataLabel
ClosureTable -> DataLabel
RednCounts -> DataLabel
_ -> CodeLabel
-- -----------------------------------------------------------------------------
-- Does a CLabel need dynamic linkage?
-- When referring to data in code, we need to know whether
-- that data resides in a DLL or not. [Win32 only.]
-- @labelDynamic@ returns @True@ if the label is located
-- in a DLL, be it a data reference or not.
labelDynamic :: DynFlags -> PackageId -> Module -> CLabel -> Bool
labelDynamic dflags this_pkg this_mod lbl =
case lbl of
-- is the RTS in a DLL or not?
RtsLabel _ -> not (gopt Opt_Static dflags) && (this_pkg /= rtsPackageId)
IdLabel n _ _ -> isDllName dflags this_pkg this_mod n
-- When compiling in the "dyn" way, each package is to be linked into
-- its own shared library.
CmmLabel pkg _ _
| os == OSMinGW32 ->
not (gopt Opt_Static dflags) && (this_pkg /= pkg)
| otherwise ->
True
ForeignLabel _ _ source _ ->
if os == OSMinGW32
then case source of
-- Foreign label is in some un-named foreign package (or DLL).
ForeignLabelInExternalPackage -> True
-- Foreign label is linked into the same package as the
-- source file currently being compiled.
ForeignLabelInThisPackage -> False
-- Foreign label is in some named package.
-- When compiling in the "dyn" way, each package is to be
-- linked into its own DLL.
ForeignLabelInPackage pkgId ->
(not (gopt Opt_Static dflags)) && (this_pkg /= pkgId)
else -- On Mac OS X and on ELF platforms, false positives are OK,
-- so we claim that all foreign imports come from dynamic
-- libraries
True
PlainModuleInitLabel m -> not (gopt Opt_Static dflags) && this_pkg /= (modulePackageId m)
HpcTicksLabel m -> not (gopt Opt_Static dflags) && this_pkg /= (modulePackageId m)
-- Note that DynamicLinkerLabels do NOT require dynamic linking themselves.
_ -> False
where os = platformOS (targetPlatform dflags)
{-
OLD?: These GRAN functions are needed for spitting out GRAN_FETCH() at the
right places. It is used to detect when the abstractC statement of an
CCodeBlock actually contains the code for a slow entry point. -- HWL
We need at least @Eq@ for @CLabels@, because we want to avoid
duplicate declarations in generating C (see @labelSeenTE@ in
@PprAbsC@).
-}
-----------------------------------------------------------------------------
-- Printing out CLabels.
{-
Convention:
<name>_<type>
where <name> is <Module>_<name> for external names and <unique> for
internal names. <type> is one of the following:
info Info table
srt Static reference table
srtd Static reference table descriptor
entry Entry code (function, closure)
slow Slow entry code (if any)
ret Direct return address
vtbl Vector table
<n>_alt Case alternative (tag n)
dflt Default case alternative
btm Large bitmap vector
closure Static closure
con_entry Dynamic Constructor entry code
con_info Dynamic Constructor info table
static_entry Static Constructor entry code
static_info Static Constructor info table
sel_info Selector info table
sel_entry Selector entry code
cc Cost centre
ccs Cost centre stack
Many of these distinctions are only for documentation reasons. For
example, _ret is only distinguished from _entry to make it easy to
tell whether a code fragment is a return point or a closure/function
entry.
Note [Closure and info labels]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For a function 'foo, we have:
foo_info : Points to the info table describing foo's closure
(and entry code for foo with tables next to code)
foo_closure : Static (no-free-var) closure only:
points to the statically-allocated closure
For a data constructor (such as Just or Nothing), we have:
Just_con_info: Info table for the data constructor itself
the first word of a heap-allocated Just
Just_info: Info table for the *worker function*, an
ordinary Haskell function of arity 1 that
allocates a (Just x) box:
Just = \x -> Just x
Just_closure: The closure for this worker
Nothing_closure: a statically allocated closure for Nothing
Nothing_static_info: info table for Nothing_closure
All these must be exported symbol, EXCEPT Just_info. We don't need to
export this because in other modules we either have
* A reference to 'Just'; use Just_closure
* A saturated call 'Just x'; allocate using Just_con_info
Not exporting these Just_info labels reduces the number of symbols
somewhat.
-}
instance Outputable CLabel where
ppr c = sdocWithPlatform $ \platform -> pprCLabel platform c
pprCLabel :: Platform -> CLabel -> SDoc
pprCLabel platform (AsmTempLabel u)
| cGhcWithNativeCodeGen == "YES"
= getPprStyle $ \ sty ->
if asmStyle sty then
ptext (asmTempLabelPrefix platform) <> pprUnique u
else
char '_' <> pprUnique u
pprCLabel platform (DynamicLinkerLabel info lbl)
| cGhcWithNativeCodeGen == "YES"
= pprDynamicLinkerAsmLabel platform info lbl
pprCLabel _ PicBaseLabel
| cGhcWithNativeCodeGen == "YES"
= ptext (sLit "1b")
pprCLabel platform (DeadStripPreventer lbl)
| cGhcWithNativeCodeGen == "YES"
= pprCLabel platform lbl <> ptext (sLit "_dsp")
pprCLabel platform lbl
= getPprStyle $ \ sty ->
if cGhcWithNativeCodeGen == "YES" && asmStyle sty
then maybe_underscore (pprAsmCLbl platform lbl)
else pprCLbl lbl
maybe_underscore :: SDoc -> SDoc
maybe_underscore doc
| underscorePrefix = pp_cSEP <> doc
| otherwise = doc
pprAsmCLbl :: Platform -> CLabel -> SDoc
pprAsmCLbl platform (ForeignLabel fs (Just sz) _ _)
| platformOS platform == OSMinGW32
-- In asm mode, we need to put the suffix on a stdcall ForeignLabel.
-- (The C compiler does this itself).
= ftext fs <> char '@' <> int sz
pprAsmCLbl _ lbl
= pprCLbl lbl
pprCLbl :: CLabel -> SDoc
pprCLbl (StringLitLabel u)
= pprUnique u <> ptext (sLit "_str")
pprCLbl (CaseLabel u CaseReturnPt)
= hcat [pprUnique u, ptext (sLit "_ret")]
pprCLbl (CaseLabel u CaseReturnInfo)
= hcat [pprUnique u, ptext (sLit "_info")]
pprCLbl (CaseLabel u (CaseAlt tag))
= hcat [pprUnique u, pp_cSEP, int tag, ptext (sLit "_alt")]
pprCLbl (CaseLabel u CaseDefault)
= hcat [pprUnique u, ptext (sLit "_dflt")]
pprCLbl (SRTLabel u)
= pprUnique u <> pp_cSEP <> ptext (sLit "srt")
pprCLbl (LargeSRTLabel u) = pprUnique u <> pp_cSEP <> ptext (sLit "srtd")
pprCLbl (LargeBitmapLabel u) = text "b" <> pprUnique u <> pp_cSEP <> ptext (sLit "btm")
-- Some bitsmaps for tuple constructors have a numeric tag (e.g. '7')
-- until that gets resolved we'll just force them to start
-- with a letter so the label will be legal assmbly code.
pprCLbl (CmmLabel _ str CmmCode) = ftext str
pprCLbl (CmmLabel _ str CmmData) = ftext str
pprCLbl (CmmLabel _ str CmmPrimCall) = ftext str
pprCLbl (RtsLabel (RtsApFast str)) = ftext str <> ptext (sLit "_fast")
pprCLbl (RtsLabel (RtsSelectorInfoTable upd_reqd offset))
= hcat [ptext (sLit "stg_sel_"), text (show offset),
ptext (if upd_reqd
then (sLit "_upd_info")
else (sLit "_noupd_info"))
]
pprCLbl (RtsLabel (RtsSelectorEntry upd_reqd offset))
= hcat [ptext (sLit "stg_sel_"), text (show offset),
ptext (if upd_reqd
then (sLit "_upd_entry")
else (sLit "_noupd_entry"))
]
pprCLbl (RtsLabel (RtsApInfoTable upd_reqd arity))
= hcat [ptext (sLit "stg_ap_"), text (show arity),
ptext (if upd_reqd
then (sLit "_upd_info")
else (sLit "_noupd_info"))
]
pprCLbl (RtsLabel (RtsApEntry upd_reqd arity))
= hcat [ptext (sLit "stg_ap_"), text (show arity),
ptext (if upd_reqd
then (sLit "_upd_entry")
else (sLit "_noupd_entry"))
]
pprCLbl (CmmLabel _ fs CmmInfo)
= ftext fs <> ptext (sLit "_info")
pprCLbl (CmmLabel _ fs CmmEntry)
= ftext fs <> ptext (sLit "_entry")
pprCLbl (CmmLabel _ fs CmmRetInfo)
= ftext fs <> ptext (sLit "_info")
pprCLbl (CmmLabel _ fs CmmRet)
= ftext fs <> ptext (sLit "_ret")
pprCLbl (CmmLabel _ fs CmmClosure)
= ftext fs <> ptext (sLit "_closure")
pprCLbl (RtsLabel (RtsPrimOp primop))
= ptext (sLit "stg_") <> ppr primop
pprCLbl (RtsLabel (RtsSlowFastTickyCtr pat))
= ptext (sLit "SLOW_CALL_fast_") <> text pat <> ptext (sLit "_ctr")
pprCLbl (ForeignLabel str _ _ _)
= ftext str
pprCLbl (IdLabel name _cafs flavor) = ppr name <> ppIdFlavor flavor
pprCLbl (CC_Label cc) = ppr cc
pprCLbl (CCS_Label ccs) = ppr ccs
pprCLbl (PlainModuleInitLabel mod)
= ptext (sLit "__stginit_") <> ppr mod
pprCLbl (HpcTicksLabel mod)
= ptext (sLit "_hpc_tickboxes_") <> ppr mod <> ptext (sLit "_hpc")
pprCLbl (AsmTempLabel {}) = panic "pprCLbl AsmTempLabel"
pprCLbl (DynamicLinkerLabel {}) = panic "pprCLbl DynamicLinkerLabel"
pprCLbl (PicBaseLabel {}) = panic "pprCLbl PicBaseLabel"
pprCLbl (DeadStripPreventer {}) = panic "pprCLbl DeadStripPreventer"
ppIdFlavor :: IdLabelInfo -> SDoc
ppIdFlavor x = pp_cSEP <>
(case x of
Closure -> ptext (sLit "closure")
SRT -> ptext (sLit "srt")
InfoTable -> ptext (sLit "info")
LocalInfoTable -> ptext (sLit "info")
Entry -> ptext (sLit "entry")
LocalEntry -> ptext (sLit "entry")
Slow -> ptext (sLit "slow")
RednCounts -> ptext (sLit "ct")
ConEntry -> ptext (sLit "con_entry")
ConInfoTable -> ptext (sLit "con_info")
StaticConEntry -> ptext (sLit "static_entry")
StaticInfoTable -> ptext (sLit "static_info")
ClosureTable -> ptext (sLit "closure_tbl")
)
pp_cSEP :: SDoc
pp_cSEP = char '_'
instance Outputable ForeignLabelSource where
ppr fs
= case fs of
ForeignLabelInPackage pkgId -> parens $ text "package: " <> ppr pkgId
ForeignLabelInThisPackage -> parens $ text "this package"
ForeignLabelInExternalPackage -> parens $ text "external package"
-- -----------------------------------------------------------------------------
-- Machine-dependent knowledge about labels.
underscorePrefix :: Bool -- leading underscore on assembler labels?
underscorePrefix = (cLeadingUnderscore == "YES")
asmTempLabelPrefix :: Platform -> LitString -- for formatting labels
asmTempLabelPrefix platform =
if platformOS platform == OSDarwin
then sLit "L"
else sLit ".L"
pprDynamicLinkerAsmLabel :: Platform -> DynamicLinkerLabelInfo -> CLabel -> SDoc
pprDynamicLinkerAsmLabel platform dllInfo lbl
= if platformOS platform == OSDarwin
then if platformArch platform == ArchX86_64
then case dllInfo of
CodeStub -> char 'L' <> ppr lbl <> text "$stub"
SymbolPtr -> char 'L' <> ppr lbl <> text "$non_lazy_ptr"
GotSymbolPtr -> ppr lbl <> text "@GOTPCREL"
GotSymbolOffset -> ppr lbl
else case dllInfo of
CodeStub -> char 'L' <> ppr lbl <> text "$stub"
SymbolPtr -> char 'L' <> ppr lbl <> text "$non_lazy_ptr"
_ -> panic "pprDynamicLinkerAsmLabel"
else if osElfTarget (platformOS platform)
then if platformArch platform == ArchPPC
then case dllInfo of
CodeStub -> ppr lbl <> text "@plt"
SymbolPtr -> text ".LC_" <> ppr lbl
_ -> panic "pprDynamicLinkerAsmLabel"
else if platformArch platform == ArchX86_64
then case dllInfo of
CodeStub -> ppr lbl <> text "@plt"
GotSymbolPtr -> ppr lbl <> text "@gotpcrel"
GotSymbolOffset -> ppr lbl
SymbolPtr -> text ".LC_" <> ppr lbl
else case dllInfo of
CodeStub -> ppr lbl <> text "@plt"
SymbolPtr -> text ".LC_" <> ppr lbl
GotSymbolPtr -> ppr lbl <> text "@got"
GotSymbolOffset -> ppr lbl <> text "@gotoff"
else if platformOS platform == OSMinGW32
then case dllInfo of
SymbolPtr -> text "__imp_" <> ppr lbl
_ -> panic "pprDynamicLinkerAsmLabel"
else panic "pprDynamicLinkerAsmLabel"
|