2 % (c) The AQUA Project, Glasgow University, 1996
4 \section[CmdLineOpts]{Things to do with command-line options}
7 #include "HsVersions.h"
19 maybe_CompilingGhcInternals,
22 opt_AutoSccsOnAllToplevs,
23 opt_AutoSccsOnExportedToplevs,
24 opt_AutoSccsOnIndividualCafs,
25 opt_CompilingGhcInternals,
32 opt_D_dump_occur_anal,
37 opt_D_dump_simpl_iterations,
44 opt_D_simplifier_stats,
46 opt_D_verbose_core2core,
47 opt_D_verbose_stg2stg,
52 opt_EnsureSplittableC,
61 opt_IgnoreIfacePragmas,
62 opt_IgnoreStrictnessPragmas,
63 opt_IrrefutableEverything,
64 opt_IrrefutableTuples,
65 opt_LiberateCaseThreshold,
66 opt_NoImplicitPrelude,
69 opt_OmitDefaultInstanceMethods,
70 opt_OmitInterfacePragmas,
77 opt_ReportWhyUnfoldingsDisallowed,
78 opt_ReturnInRegsThreshold,
82 opt_ShowPragmaNameErrs,
86 opt_SpecialiseImports,
87 opt_SpecialiseOverloaded,
89 opt_SpecialiseUnboxed,
90 opt_StgDoLetNoEscapes,
92 opt_InterfaceUnfoldThreshold,
93 opt_UnfoldingCreationThreshold,
94 opt_UnfoldingConDiscount,
95 opt_UnfoldingUseThreshold,
101 IMPORT_1_3(Array(array, (//)))
102 import PreludeGlaST -- bad bad bad boy, Will (_Array internals)
105 CHK_Ubiq() -- debugging consistency check
107 import Constants -- Default values for some flags
109 import Maybes ( assocMaybe, firstJust, maybeToBool )
110 import Util ( startsWith, panic, panic#, assertPanic )
113 A command-line {\em switch} is (generally) either on or off; e.g., the
114 ``verbose'' (-v) switch is either on or off. (The \tr{-G<group>}
115 switch is an exception; it's set to a string, or nothing.)
117 A list of {\em ToDo}s is things to be done in a particular part of
118 processing. A (fictitious) example for the Core-to-Core simplifier
119 might be: run the simplifier, then run the strictness analyser, then
120 run the simplifier again (three ``todos'').
122 There are three ``to-do processing centers'' at the moment. In the
123 main loop (\tr{main/Main.lhs}), in the Core-to-Core processing loop
124 (\tr{simplCore/SimplCore.lhs), and in the STG-to-STG processing loop
125 (\tr{simplStg/SimplStg.lhs}).
127 %************************************************************************
129 \subsection{Datatypes associated with command-line options}
131 %************************************************************************
135 = SwBool Bool -- on/off
136 | SwString FAST_STRING -- nothing or a String
137 | SwInt Int -- nothing or an Int
141 data CoreToDo -- These are diff core-to-core passes,
142 -- which may be invoked in any order,
143 -- as many times as you like.
145 = CoreDoSimplify -- The core-to-core simplifier.
146 (SimplifierSwitch -> SwitchResult)
147 -- Each run of the simplifier can take a different
148 -- set of simplifier-specific flags.
149 | CoreDoCalcInlinings1
150 | CoreDoCalcInlinings2
159 | CoreDoFoldrBuildWorkerWrapper
160 | CoreDoFoldrBuildWWAnal
166 | StgDoUpdateAnalysis
168 | StgDoMassageForProfiling -- should be (next to) last
169 -- There's also setStgVarInfo, but its absolute "lastness"
170 -- is so critical that it is hardwired in (no flag).
175 data SimplifierSwitch
177 | SimplFloatLetsExposingWHNF
178 | SimplOkToFloatPrimOps
179 | SimplAlwaysFloatLetsFromLets
184 | SimplMayDeleteConjurableIds
185 | SimplPedanticBottoms -- see Simplifier for an explanation
186 | SimplDoArityExpand -- expand arity of bindings
187 | SimplDoFoldrBuild -- This is the per-simplification flag;
188 -- see also FoldrBuildOn, used elsewhere
190 | SimplDoInlineFoldrBuild
191 -- inline foldr/build (*after* f/b rule is used)
194 | SimplDoLambdaEtaExpansion
196 | EssentialUnfoldingsOnly -- never mind the thresholds, only
197 -- do unfoldings that *must* be done
198 -- (to saturate constructors and primitives)
200 | ShowSimplifierProgress -- report counts on every interation
202 | MaxSimplifierIterations Int
204 | KeepSpecPragmaIds -- We normally *toss* Ids we can do without
207 | SimplNoLetFromCase -- used when turning off floating entirely
208 | SimplNoLetFromApp -- (for experimentation only) WDP 95/10
209 | SimplNoLetFromStrictLet
211 | SimplDontFoldBackAppend
212 -- we fold `foldr (:)' back into flip (++),
213 -- but we *don't* want to do it when compiling
214 -- List.hs, otherwise
215 -- xs ++ ys = foldr (:) ys xs
216 -- {- via our loopback -}
217 -- xs ++ ys = xs ++ ys
219 -- So only use this flag inside List.hs
220 -- (Sigh, what a HACK, Andy. WDP 96/01)
225 %************************************************************************
227 \subsection{Classifying command-line options}
229 %************************************************************************
232 lookUp :: FAST_STRING -> Bool
233 lookup_int :: String -> Maybe Int
234 lookup_def_int :: String -> Int -> Int
235 lookup_str :: String -> Maybe String
237 lookUp sw = maybeToBool (assoc_opts sw)
239 lookup_str sw = firstJust (map (startsWith sw) unpacked_opts)
241 lookup_int sw = case (lookup_str sw) of
243 Just xx -> Just (read xx)
245 lookup_def_int sw def = case (lookup_str sw) of
246 Nothing -> def -- Use default
249 assoc_opts = assocMaybe [ (a, True) | a <- argv ]
250 unpacked_opts = map _UNPK_ argv
254 opt_AllDemanded = lookUp SLIT("-fall-demanded")
255 opt_AllStrict = lookUp SLIT("-fall-strict")
256 opt_AutoSccsOnAllToplevs = lookUp SLIT("-fauto-sccs-on-all-toplevs")
257 opt_AutoSccsOnExportedToplevs = lookUp SLIT("-fauto-sccs-on-exported-toplevs")
258 opt_AutoSccsOnIndividualCafs = lookUp SLIT("-fauto-sccs-on-individual-cafs")
259 opt_CompilingGhcInternals = maybeToBool maybe_CompilingGhcInternals
260 maybe_CompilingGhcInternals = lookup_str "-fcompiling-ghc-internals="
261 opt_D_dump_absC = lookUp SLIT("-ddump-absC")
262 opt_D_dump_asm = lookUp SLIT("-ddump-asm")
263 opt_D_dump_deforest = lookUp SLIT("-ddump-deforest")
264 opt_D_dump_deriv = lookUp SLIT("-ddump-deriv")
265 opt_D_dump_ds = lookUp SLIT("-ddump-ds")
266 opt_D_dump_flatC = lookUp SLIT("-ddump-flatC")
267 opt_D_dump_occur_anal = lookUp SLIT("-ddump-occur-anal")
268 opt_D_dump_rdr = lookUp SLIT("-ddump-rdr")
269 opt_D_dump_realC = lookUp SLIT("-ddump-realC")
270 opt_D_dump_rn = lookUp SLIT("-ddump-rn")
271 opt_D_dump_simpl = lookUp SLIT("-ddump-simpl")
272 opt_D_dump_simpl_iterations = lookUp SLIT("-ddump-simpl_iterations")
273 opt_D_dump_spec = lookUp SLIT("-ddump-spec")
274 opt_D_dump_stg = lookUp SLIT("-ddump-stg")
275 opt_D_dump_stranal = lookUp SLIT("-ddump-stranal")
276 opt_D_dump_tc = lookUp SLIT("-ddump-tc")
277 opt_D_show_passes = lookUp SLIT("-dshow-passes")
278 opt_D_show_rn_trace = lookUp SLIT("-dshow-rn-trace")
279 opt_D_simplifier_stats = lookUp SLIT("-dsimplifier-stats")
280 opt_D_source_stats = lookUp SLIT("-dsource-stats")
281 opt_D_verbose_core2core = lookUp SLIT("-dverbose-simpl")
282 opt_D_verbose_stg2stg = lookUp SLIT("-dverbose-stg")
283 opt_DoCoreLinting = lookUp SLIT("-dcore-lint")
284 opt_DoSemiTagging = lookUp SLIT("-fsemi-tagging")
285 opt_DoTickyProfiling = lookUp SLIT("-fticky-ticky")
286 opt_DoEtaReduction = lookUp SLIT("-fdo-eta-reduction")
287 opt_EnsureSplittableC = lookUp SLIT("-fglobalise-toplev-names")
288 opt_FoldrBuildOn = lookUp SLIT("-ffoldr-build-on")
289 opt_FoldrBuildTrace = lookUp SLIT("-ffoldr-build-trace")
290 opt_ForConcurrent = lookUp SLIT("-fconcurrent")
291 opt_GranMacros = lookUp SLIT("-fgransim")
292 opt_GlasgowExts = lookUp SLIT("-fglasgow-exts")
293 opt_Haskell_1_3 = lookUp SLIT("-fhaskell-1.3")
294 opt_HiMap = lookup_str "-himap=" -- file saying where to look for .hi files
295 opt_HiSuffix = lookup_str "-hisuf="
296 opt_IgnoreIfacePragmas = lookUp SLIT("-fignore-interface-pragmas")
297 opt_IgnoreStrictnessPragmas = lookUp SLIT("-fignore-strictness-pragmas")
298 opt_IrrefutableEverything = lookUp SLIT("-firrefutable-everything")
299 opt_IrrefutableTuples = lookUp SLIT("-firrefutable-tuples")
300 opt_NoImplicitPrelude = lookUp SLIT("-fno-implicit-prelude")
301 opt_NumbersStrict = lookUp SLIT("-fnumbers-strict")
302 opt_OmitBlackHoling = lookUp SLIT("-dno-black-holing")
303 opt_OmitDefaultInstanceMethods = lookUp SLIT("-fomit-default-instance-methods")
304 opt_OmitInterfacePragmas = lookUp SLIT("-fomit-interface-pragmas")
305 opt_PprStyle_All = lookUp SLIT("-dppr-all")
306 opt_PprStyle_Debug = lookUp SLIT("-dppr-debug")
307 opt_PprStyle_User = lookUp SLIT("-dppr-user")
308 opt_ProduceC = lookup_str "-C="
309 opt_ProduceS = lookup_str "-S="
310 opt_ProduceHi = lookup_str "-hifile=" -- the one to produce this time
311 opt_ReportWhyUnfoldingsDisallowed= lookUp SLIT("-freport-disallowed-unfoldings")
312 opt_SccProfilingOn = lookUp SLIT("-fscc-profiling")
313 opt_ShowImportSpecs = lookUp SLIT("-fshow-import-specs")
314 opt_ShowPragmaNameErrs = lookUp SLIT("-fshow-pragma-name-errs")
315 opt_SigsRequired = lookUp SLIT("-fsignatures-required")
316 opt_SourceUnchanged = lookUp SLIT("-fsource-unchanged")
317 opt_SpecialiseAll = lookUp SLIT("-fspecialise-all")
318 opt_SpecialiseImports = lookUp SLIT("-fspecialise-imports")
319 opt_SpecialiseOverloaded = lookUp SLIT("-fspecialise-overloaded")
320 opt_SpecialiseTrace = lookUp SLIT("-ftrace-specialisation")
321 opt_SpecialiseUnboxed = lookUp SLIT("-fspecialise-unboxed")
322 opt_StgDoLetNoEscapes = lookUp SLIT("-flet-no-escape")
323 opt_ReturnInRegsThreshold = lookup_int "-freturn-in-regs-threshold"
324 opt_SccGroup = lookup_str "-G="
325 opt_Verbose = lookUp SLIT("-v")
327 opt_InterfaceUnfoldThreshold = lookup_def_int "-funfolding-interface-threshold" iNTERFACE_UNFOLD_THRESHOLD
328 opt_UnfoldingCreationThreshold = lookup_def_int "-funfolding-creation-threshold" uNFOLDING_CREATION_THRESHOLD
329 opt_UnfoldingUseThreshold = lookup_def_int "-funfolding-use-threshold" uNFOLDING_USE_THRESHOLD
330 opt_UnfoldingConDiscount = lookup_def_int "-funfolding-con-discount" uNFOLDING_CON_DISCOUNT_WEIGHT
332 opt_LiberateCaseThreshold = lookup_def_int "-fliberate-case-threshold" lIBERATE_CASE_THRESHOLD
333 opt_WarnNameShadowing = lookUp SLIT("-fwarn-name-shadowing")
335 -- opt_UnfoldingUseThreshold = lookup_int "-funfolding-use-threshold"
336 -- opt_UnfoldingOverrideThreshold = lookup_int "-funfolding-override-threshold"
340 classifyOpts :: ([CoreToDo], -- Core-to-Core processing spec
341 [StgToDo]) -- STG-to-STG processing spec
343 classifyOpts = sep argv [] [] -- accumulators...
345 sep :: [FAST_STRING] -- cmd-line opts (input)
346 -> [CoreToDo] -> [StgToDo] -- to_do accumulators
347 -> ([CoreToDo], [StgToDo]) -- result
349 sep [] core_td stg_td -- all done!
350 = (reverse core_td, reverse stg_td)
352 # define CORE_TD(to_do) sep opts (to_do:core_td) stg_td
353 # define STG_TD(to_do) sep opts core_td (to_do:stg_td)
354 # define IGNORE_ARG() sep opts core_td stg_td
356 sep (opt1:opts) core_td stg_td
358 case (_UNPK_ opt1) of -- the non-"just match a string" options are at the end...
360 ',' : _ -> IGNORE_ARG() -- it is for the parser
362 "-fsimplify" -> -- gather up SimplifierSwitches specially...
363 simpl_sep opts defaultSimplSwitches core_td stg_td
365 "-fcalc-inlinings1"-> CORE_TD(CoreDoCalcInlinings1)
366 "-fcalc-inlinings2"-> CORE_TD(CoreDoCalcInlinings2)
367 "-ffloat-inwards" -> CORE_TD(CoreDoFloatInwards)
368 "-ffull-laziness" -> CORE_TD(CoreDoFullLaziness)
369 "-fliberate-case" -> CORE_TD(CoreLiberateCase)
370 "-fprint-core" -> CORE_TD(CoreDoPrintCore)
371 "-fstatic-args" -> CORE_TD(CoreDoStaticArgs)
372 "-fstrictness" -> CORE_TD(CoreDoStrictness)
373 "-fspecialise" -> CORE_TD(CoreDoSpecialising)
374 "-fdeforest" -> CORE_TD(CoreDoDeforest)
375 "-ffoldr-build-worker-wrapper" -> CORE_TD(CoreDoFoldrBuildWorkerWrapper)
376 "-ffoldr-build-ww-anal" -> CORE_TD(CoreDoFoldrBuildWWAnal)
378 "-fstg-static-args" -> STG_TD(StgDoStaticArgs)
379 "-fupdate-analysis" -> STG_TD(StgDoUpdateAnalysis)
380 "-dstg-stats" -> STG_TD(D_stg_stats)
381 "-flambda-lift" -> STG_TD(StgDoLambdaLift)
382 "-fmassage-stg-for-profiling" -> STG_TD(StgDoMassageForProfiling)
384 _ -> -- NB: the driver is really supposed to handle bad options
389 simpl_sep :: [FAST_STRING] -- cmd-line opts (input)
390 -> [SimplifierSwitch] -- simplifier-switch accumulator
391 -> [CoreToDo] -> [StgToDo] -- to_do accumulators
392 -> ([CoreToDo], [StgToDo]) -- result
394 -- "simpl_sep" tailcalls "sep" once it's seen one set
395 -- of SimplifierSwitches for a CoreDoSimplify.
398 simpl_sep input@[] simpl_sw core_td stg_td
399 = panic "simpl_sep []"
402 -- The SimplifierSwitches should be delimited by "(" and ")".
404 simpl_sep (opt1:opts) simpl_sw core_td stg_td
405 = case (_UNPK_ opt1) of
406 "(" -> simpl_sep opts simpl_sw core_td stg_td
408 this_simpl = CoreDoSimplify (isAmongSimpl simpl_sw)
410 sep opts (this_simpl : core_td) stg_td
412 # define SIMPL_SW(sw) simpl_sep opts (sw:simpl_sw) core_td stg_td
414 -- the non-"just match a string" options are at the end...
415 "-fshow-simplifier-progress" -> SIMPL_SW(ShowSimplifierProgress)
416 "-fcode-duplication-ok" -> SIMPL_SW(SimplOkToDupCode)
417 "-ffloat-lets-exposing-whnf" -> SIMPL_SW(SimplFloatLetsExposingWHNF)
418 "-ffloat-primops-ok" -> SIMPL_SW(SimplOkToFloatPrimOps)
419 "-falways-float-lets-from-lets" -> SIMPL_SW(SimplAlwaysFloatLetsFromLets)
420 "-fdo-case-elim" -> SIMPL_SW(SimplDoCaseElim)
421 "-fdo-lambda-eta-expansion" -> SIMPL_SW(SimplDoLambdaEtaExpansion)
422 "-fdo-foldr-build" -> SIMPL_SW(SimplDoFoldrBuild)
423 "-fdo-not-fold-back-append" -> SIMPL_SW(SimplDontFoldBackAppend)
424 "-fdo-arity-expand" -> SIMPL_SW(SimplDoArityExpand)
425 "-fdo-inline-foldr-build" -> SIMPL_SW(SimplDoInlineFoldrBuild)
426 "-freuse-con" -> SIMPL_SW(SimplReuseCon)
427 "-fcase-of-case" -> SIMPL_SW(SimplCaseOfCase)
428 "-fcase-merge" -> SIMPL_SW(SimplCaseMerge)
429 "-flet-to-case" -> SIMPL_SW(SimplLetToCase)
430 "-fpedantic-bottoms" -> SIMPL_SW(SimplPedanticBottoms)
431 "-fkeep-spec-pragma-ids" -> SIMPL_SW(KeepSpecPragmaIds)
432 "-fkeep-unused-bindings" -> SIMPL_SW(KeepUnusedBindings)
433 "-fmay-delete-conjurable-ids" -> SIMPL_SW(SimplMayDeleteConjurableIds)
434 "-fessential-unfoldings-only" -> SIMPL_SW(EssentialUnfoldingsOnly)
435 "-fignore-inline-pragma" -> SIMPL_SW(IgnoreINLINEPragma)
436 "-fno-let-from-case" -> SIMPL_SW(SimplNoLetFromCase)
437 "-fno-let-from-app" -> SIMPL_SW(SimplNoLetFromApp)
438 "-fno-let-from-strict-let" -> SIMPL_SW(SimplNoLetFromStrictLet)
440 o | starts_with_msi -> SIMPL_SW(MaxSimplifierIterations (read after_msi))
442 maybe_msi = startsWith "-fmax-simplifier-iterations" o
443 starts_with_msi = maybeToBool maybe_msi
444 (Just after_msi) = maybe_msi
446 _ -> -- NB: the driver is really supposed to handle bad options
447 simpl_sep opts simpl_sw core_td stg_td
450 %************************************************************************
452 \subsection{Switch ordering}
454 %************************************************************************
456 In spite of the @Produce*@ and @SccGroup@ constructors, these things
457 behave just like enumeration types.
460 instance Eq SimplifierSwitch where
461 a == b = tagOf_SimplSwitch a _EQ_ tagOf_SimplSwitch b
463 instance Ord SimplifierSwitch where
464 a < b = tagOf_SimplSwitch a _LT_ tagOf_SimplSwitch b
465 a <= b = tagOf_SimplSwitch a _LE_ tagOf_SimplSwitch b
467 tagOf_SimplSwitch SimplOkToDupCode =(ILIT(0) :: FAST_INT)
468 tagOf_SimplSwitch SimplFloatLetsExposingWHNF = ILIT(1)
469 tagOf_SimplSwitch SimplOkToFloatPrimOps = ILIT(2)
470 tagOf_SimplSwitch SimplAlwaysFloatLetsFromLets = ILIT(3)
471 tagOf_SimplSwitch SimplDoCaseElim = ILIT(4)
472 tagOf_SimplSwitch SimplReuseCon = ILIT(5)
473 tagOf_SimplSwitch SimplCaseOfCase = ILIT(6)
474 tagOf_SimplSwitch SimplLetToCase = ILIT(7)
475 tagOf_SimplSwitch SimplMayDeleteConjurableIds = ILIT(9)
476 tagOf_SimplSwitch SimplPedanticBottoms = ILIT(10)
477 tagOf_SimplSwitch SimplDoArityExpand = ILIT(11)
478 tagOf_SimplSwitch SimplDoFoldrBuild = ILIT(12)
479 tagOf_SimplSwitch SimplDoInlineFoldrBuild = ILIT(14)
480 tagOf_SimplSwitch IgnoreINLINEPragma = ILIT(15)
481 tagOf_SimplSwitch SimplDoLambdaEtaExpansion = ILIT(16)
482 tagOf_SimplSwitch EssentialUnfoldingsOnly = ILIT(19)
483 tagOf_SimplSwitch ShowSimplifierProgress = ILIT(20)
484 tagOf_SimplSwitch (MaxSimplifierIterations _) = ILIT(21)
485 tagOf_SimplSwitch KeepSpecPragmaIds = ILIT(25)
486 tagOf_SimplSwitch KeepUnusedBindings = ILIT(26)
487 tagOf_SimplSwitch SimplNoLetFromCase = ILIT(27)
488 tagOf_SimplSwitch SimplNoLetFromApp = ILIT(28)
489 tagOf_SimplSwitch SimplNoLetFromStrictLet = ILIT(29)
490 tagOf_SimplSwitch SimplDontFoldBackAppend = ILIT(30)
491 tagOf_SimplSwitch SimplCaseMerge = ILIT(31)
492 -- If you add anything here, be sure to change lAST_SIMPL_SWITCH_TAG, too!
494 tagOf_SimplSwitch _ = panic# "tagOf_SimplSwitch"
496 lAST_SIMPL_SWITCH_TAG = IBOX(tagOf_SimplSwitch SimplCaseMerge)
499 %************************************************************************
501 \subsection{Switch lookup}
503 %************************************************************************
506 #if __GLASGOW_HASKELL__ >= 200
508 # define LIFT GHCbase.Lift
512 # define ARRAY _Array
517 isAmongSimpl :: [SimplifierSwitch] -> SimplifierSwitch -> SwitchResult
519 isAmongSimpl on_switches -- Switches mentioned later occur *earlier*
520 -- in the list; defaults right at the end.
522 tidied_on_switches = foldl rm_dups [] on_switches
523 -- The fold*l* ensures that we keep the latest switches;
524 -- ie the ones that occur earliest in the list.
526 sw_tbl :: Array Int SwitchResult
528 sw_tbl = (array (0, lAST_SIMPL_SWITCH_TAG) -- bounds...
532 all_undefined = [ i SET_TO SwBool False | i <- [0 .. lAST_SIMPL_SWITCH_TAG ] ]
534 defined_elems = map mk_assoc_elem tidied_on_switches
536 -- (avoid some unboxing, bounds checking, and other horrible things:)
537 case sw_tbl of { ARRAY bounds_who_needs_'em stuff ->
539 case (indexArray# stuff (tagOf_SimplSwitch switch)) of
543 mk_assoc_elem k@(MaxSimplifierIterations lvl) = IBOX(tagOf_SimplSwitch k) SET_TO SwInt lvl
545 mk_assoc_elem k = IBOX(tagOf_SimplSwitch k) SET_TO SwBool True -- I'm here, Mom!
547 -- cannot have duplicates if we are going to use the array thing
548 rm_dups switches_so_far switch
549 = if switch `is_elem` switches_so_far
551 else switch : switches_so_far
553 sw `is_elem` [] = False
554 sw `is_elem` (s:ss) = (tagOf_SimplSwitch sw) _EQ_ (tagOf_SimplSwitch s)
558 Default settings for simplifier switches
561 defaultSimplSwitches = [MaxSimplifierIterations 1
565 %************************************************************************
567 \subsection{Misc functions for command-line options}
569 %************************************************************************
573 switchIsOn :: (switch -> SwitchResult) -> switch -> Bool
575 switchIsOn lookup_fn switch
576 = case (lookup_fn switch) of
577 SwBool False -> False
580 stringSwitchSet :: (switch -> SwitchResult)
581 -> (FAST_STRING -> switch)
584 stringSwitchSet lookup_fn switch
585 = case (lookup_fn (switch (panic "stringSwitchSet"))) of
586 SwString str -> Just str
589 intSwitchSet :: (switch -> SwitchResult)
593 intSwitchSet lookup_fn switch
594 = case (lookup_fn (switch (panic "intSwitchSet"))) of
595 SwInt int -> Just int