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,
21 opt_AutoSccsOnAllToplevs,
22 opt_AutoSccsOnExportedToplevs,
23 opt_AutoSccsOnIndividualCafs,
24 opt_CompilingGhcInternals,
30 opt_D_dump_occur_anal,
35 opt_D_dump_simpl_iterations,
42 opt_D_simplifier_stats,
44 opt_D_verbose_core2core,
45 opt_D_verbose_stg2stg,
51 opt_EnsureSplittableC,
57 opt_IgnoreIfacePragmas,
58 opt_IrrefutableTuples,
59 opt_LiberateCaseThreshold,
60 opt_NoImplicitPrelude,
63 opt_OmitInterfacePragmas,
66 opt_PprStyle_User, -- ToDo: rm
71 opt_ReportWhyUnfoldingsDisallowed,
72 opt_ReturnInRegsThreshold,
79 opt_SpecialiseImports,
80 opt_SpecialiseOverloaded,
82 opt_SpecialiseUnboxed,
83 opt_StgDoLetNoEscapes,
85 opt_InterfaceUnfoldThreshold,
86 opt_UnfoldingCreationThreshold,
87 opt_UnfoldingConDiscount,
88 opt_UnfoldingUseThreshold,
89 opt_UnfoldingKeenessFactor,
92 opt_WarnNameShadowing,
94 opt_WarnIncompletePatterns, opt_WarnOverlappingPatterns, opt_WarnSimplePatterns,
95 opt_WarnMissingMethods,
96 opt_WarnDuplicateExports,
97 opt_PruneTyDecls, opt_PruneInstDecls,
98 opt_D_show_unused_imports,
101 all_toplev_ids_visible
104 IMPORT_1_3(Array(array, (//)))
105 #if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201
106 import PreludeGlaST -- bad bad bad boy, Will (_Array internals)
110 #if __GLASGOW_HASKELL__ >= 209
113 -- 2.04 and later exports Lift from GlaExts
114 #if __GLASGOW_HASKELL__ < 204
115 import PrelBase (Lift(..))
119 CHK_Ubiq() -- debugging consistency check
122 import Constants -- Default values for some flags
123 import Maybes ( assocMaybe, firstJust, maybeToBool )
124 import Util ( startsWith, panic, panic#, assertPanic )
127 A command-line {\em switch} is (generally) either on or off; e.g., the
128 ``verbose'' (-v) switch is either on or off. (The \tr{-G<group>}
129 switch is an exception; it's set to a string, or nothing.)
131 A list of {\em ToDo}s is things to be done in a particular part of
132 processing. A (fictitious) example for the Core-to-Core simplifier
133 might be: run the simplifier, then run the strictness analyser, then
134 run the simplifier again (three ``todos'').
136 There are three ``to-do processing centers'' at the moment. In the
137 main loop (\tr{main/Main.lhs}), in the Core-to-Core processing loop
138 (\tr{simplCore/SimplCore.lhs), and in the STG-to-STG processing loop
139 (\tr{simplStg/SimplStg.lhs}).
141 %************************************************************************
143 \subsection{Datatypes associated with command-line options}
145 %************************************************************************
149 = SwBool Bool -- on/off
150 | SwString FAST_STRING -- nothing or a String
151 | SwInt Int -- nothing or an Int
155 data CoreToDo -- These are diff core-to-core passes,
156 -- which may be invoked in any order,
157 -- as many times as you like.
159 = CoreDoSimplify -- The core-to-core simplifier.
160 (SimplifierSwitch -> SwitchResult)
161 -- Each run of the simplifier can take a different
162 -- set of simplifier-specific flags.
163 | CoreDoCalcInlinings1
164 | CoreDoCalcInlinings2
172 | CoreDoFoldrBuildWorkerWrapper
173 | CoreDoFoldrBuildWWAnal
179 | StgDoUpdateAnalysis
181 | StgDoMassageForProfiling -- should be (next to) last
182 -- There's also setStgVarInfo, but its absolute "lastness"
183 -- is so critical that it is hardwired in (no flag).
188 data SimplifierSwitch
190 | SimplFloatLetsExposingWHNF
191 | SimplOkToFloatPrimOps
192 | SimplAlwaysFloatLetsFromLets
197 | SimplMayDeleteConjurableIds
198 | SimplPedanticBottoms -- see Simplifier for an explanation
199 | SimplDoArityExpand -- expand arity of bindings
200 | SimplDoFoldrBuild -- This is the per-simplification flag;
201 -- see also FoldrBuildOn, used elsewhere
203 | SimplDoInlineFoldrBuild
204 -- inline foldr/build (*after* f/b rule is used)
207 | SimplDoLambdaEtaExpansion
209 | EssentialUnfoldingsOnly -- never mind the thresholds, only
210 -- do unfoldings that *must* be done
211 -- (to saturate constructors and primitives)
213 | ShowSimplifierProgress -- report counts on every interation
215 | MaxSimplifierIterations Int
217 | KeepSpecPragmaIds -- We normally *toss* Ids we can do without
220 | SimplNoLetFromCase -- used when turning off floating entirely
221 | SimplNoLetFromApp -- (for experimentation only) WDP 95/10
222 | SimplNoLetFromStrictLet
224 | SimplDontFoldBackAppend
225 -- we fold `foldr (:)' back into flip (++),
226 -- but we *don't* want to do it when compiling
227 -- List.hs, otherwise
228 -- xs ++ ys = foldr (:) ys xs
229 -- {- via our loopback -}
230 -- xs ++ ys = xs ++ ys
232 -- So only use this flag inside List.hs
233 -- (Sigh, what a HACK, Andy. WDP 96/01)
236 | SimplCaseScrutinee -- This flag tells that the expression being simplified is
237 -- the scrutinee of a case expression, so we should
238 -- apply the scrutinee discount when considering inlinings.
242 %************************************************************************
244 \subsection{Classifying command-line options}
246 %************************************************************************
249 lookUp :: FAST_STRING -> Bool
250 lookup_int :: String -> Maybe Int
251 lookup_def_int :: String -> Int -> Int
252 lookup_def_float :: String -> Float -> Float
253 lookup_str :: String -> Maybe String
255 lookUp sw = maybeToBool (assoc_opts sw)
257 lookup_str sw = firstJust (map (startsWith sw) unpacked_opts)
259 lookup_int sw = case (lookup_str sw) of
261 Just xx -> Just (read xx)
263 lookup_def_int sw def = case (lookup_str sw) of
264 Nothing -> def -- Use default
267 lookup_def_float sw def = case (lookup_str sw) of
268 Nothing -> def -- Use default
271 assoc_opts = assocMaybe [ (a, True) | a <- argv ]
272 unpacked_opts = map _UNPK_ argv
276 opt_AllStrict = lookUp SLIT("-fall-strict")
277 opt_AutoSccsOnAllToplevs = lookUp SLIT("-fauto-sccs-on-all-toplevs")
278 opt_AutoSccsOnExportedToplevs = lookUp SLIT("-fauto-sccs-on-exported-toplevs")
279 opt_AutoSccsOnIndividualCafs = lookUp SLIT("-fauto-sccs-on-individual-cafs")
280 opt_CompilingGhcInternals = maybeToBool maybe_CompilingGhcInternals
281 maybe_CompilingGhcInternals = lookup_str "-fcompiling-ghc-internals="
282 opt_D_dump_absC = lookUp SLIT("-ddump-absC")
283 opt_D_dump_asm = lookUp SLIT("-ddump-asm")
284 opt_D_dump_deriv = lookUp SLIT("-ddump-deriv")
285 opt_D_dump_ds = lookUp SLIT("-ddump-ds")
286 opt_D_dump_flatC = lookUp SLIT("-ddump-flatC")
287 opt_D_dump_occur_anal = lookUp SLIT("-ddump-occur-anal")
288 opt_D_dump_rdr = lookUp SLIT("-ddump-rdr")
289 opt_D_dump_realC = lookUp SLIT("-ddump-realC")
290 opt_D_dump_rn = lookUp SLIT("-ddump-rn")
291 opt_D_dump_simpl = lookUp SLIT("-ddump-simpl")
292 opt_D_dump_simpl_iterations = lookUp SLIT("-ddump-simpl-iterations")
293 opt_D_dump_spec = lookUp SLIT("-ddump-spec")
294 opt_D_dump_stg = lookUp SLIT("-ddump-stg")
295 opt_D_dump_stranal = lookUp SLIT("-ddump-stranal")
296 opt_D_dump_tc = lookUp SLIT("-ddump-tc")
297 opt_D_show_passes = lookUp SLIT("-dshow-passes")
298 opt_D_show_rn_trace = lookUp SLIT("-dshow-rn-trace")
299 opt_D_simplifier_stats = lookUp SLIT("-dsimplifier-stats")
300 opt_D_source_stats = lookUp SLIT("-dsource-stats")
301 opt_D_verbose_core2core = lookUp SLIT("-dverbose-simpl")
302 opt_D_verbose_stg2stg = lookUp SLIT("-dverbose-stg")
303 opt_DoCoreLinting = lookUp SLIT("-dcore-lint")
304 opt_DoStgLinting = lookUp SLIT("-dstg-lint")
305 opt_DoSemiTagging = lookUp SLIT("-fsemi-tagging")
306 opt_DoTickyProfiling = lookUp SLIT("-fticky-ticky")
307 opt_DoEtaReduction = lookUp SLIT("-fdo-eta-reduction")
308 opt_EnsureSplittableC = lookUp SLIT("-fglobalise-toplev-names")
309 opt_FoldrBuildOn = lookUp SLIT("-ffoldr-build-on")
310 opt_ForConcurrent = lookUp SLIT("-fconcurrent")
311 opt_GranMacros = lookUp SLIT("-fgransim")
312 opt_GlasgowExts = lookUp SLIT("-fglasgow-exts")
313 --UNUSED:opt_Haskell_1_3 = lookUp SLIT("-fhaskell-1.3")
314 opt_HiMap = lookup_str "-himap=" -- file saying where to look for .hi files
315 opt_IgnoreIfacePragmas = lookUp SLIT("-fignore-interface-pragmas")
316 opt_IrrefutableTuples = lookUp SLIT("-firrefutable-tuples")
317 opt_NoImplicitPrelude = lookUp SLIT("-fno-implicit-prelude")
318 opt_NumbersStrict = lookUp SLIT("-fnumbers-strict")
319 opt_OmitBlackHoling = lookUp SLIT("-dno-black-holing")
320 opt_OmitInterfacePragmas = lookUp SLIT("-fomit-interface-pragmas")
321 opt_PprStyle_All = lookUp SLIT("-dppr-all")
322 opt_PprStyle_Debug = lookUp SLIT("-dppr-debug")
323 opt_PprStyle_User = lookUp SLIT("-dppr-user")
324 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
325 opt_ProduceC = lookup_str "-C="
326 opt_ProduceS = lookup_str "-S="
327 opt_ProduceHi = lookup_str "-hifile=" -- the one to produce this time
328 opt_ReportWhyUnfoldingsDisallowed= lookUp SLIT("-freport-disallowed-unfoldings")
329 opt_SccProfilingOn = lookUp SLIT("-fscc-profiling")
330 opt_ShowImportSpecs = lookUp SLIT("-fshow-import-specs")
331 opt_SigsRequired = lookUp SLIT("-fsignatures-required")
332 opt_SourceUnchanged = lookUp SLIT("-fsource-unchanged")
333 opt_SpecialiseAll = lookUp SLIT("-fspecialise-all")
334 opt_SpecialiseImports = lookUp SLIT("-fspecialise-imports")
335 opt_SpecialiseOverloaded = lookUp SLIT("-fspecialise-overloaded")
336 opt_SpecialiseTrace = lookUp SLIT("-ftrace-specialisation")
337 opt_SpecialiseUnboxed = lookUp SLIT("-fspecialise-unboxed")
338 opt_StgDoLetNoEscapes = lookUp SLIT("-flet-no-escape")
339 opt_ReturnInRegsThreshold = lookup_int "-freturn-in-regs-threshold"
340 opt_SccGroup = lookup_str "-G="
341 opt_Verbose = lookUp SLIT("-v")
343 opt_InterfaceUnfoldThreshold = lookup_def_int "-funfolding-interface-threshold" iNTERFACE_UNFOLD_THRESHOLD
344 opt_UnfoldingCreationThreshold = lookup_def_int "-funfolding-creation-threshold" uNFOLDING_CREATION_THRESHOLD
345 opt_UnfoldingUseThreshold = lookup_def_int "-funfolding-use-threshold" uNFOLDING_USE_THRESHOLD
346 opt_UnfoldingConDiscount = lookup_def_int "-funfolding-con-discount" uNFOLDING_CON_DISCOUNT_WEIGHT
348 opt_LiberateCaseThreshold = lookup_def_int "-fliberate-case-threshold" lIBERATE_CASE_THRESHOLD
349 opt_UnfoldingKeenessFactor = lookup_def_float "-funfolding-keeness-factor" uNFOLDING_KEENESS_FACTOR
350 opt_WarnNameShadowing = lookUp SLIT("-fwarn-name-shadowing")
351 opt_WarnIncompletePatterns = lookUp SLIT("-fwarn-incomplete-patterns")
352 opt_WarnOverlappingPatterns = lookUp SLIT("-fwarn-overlapping-patterns")
353 opt_WarnSimplePatterns = lookUp SLIT("-fwarn-simple-patterns")
354 opt_WarnUnusedNames = lookUp SLIT("-fwarn-unused-names")
355 opt_WarnMissingMethods = lookUp SLIT("-fwarn-missing-methods")
356 opt_WarnDuplicateExports = lookUp SLIT("-fwarn-duplicate-exports")
357 opt_PruneTyDecls = not (lookUp SLIT("-fno-prune-tydecls"))
358 opt_PruneInstDecls = not (lookUp SLIT("-fno-prune-instdecls"))
359 opt_D_show_unused_imports = lookUp SLIT("-dshow-unused-imports")
360 opt_D_show_rn_stats = lookUp SLIT("-dshow-rn-stats")
362 -- opt_UnfoldingOverrideThreshold = lookup_int "-funfolding-override-threshold"
367 all_toplev_ids_visible :: Bool
368 all_toplev_ids_visible =
369 not opt_OmitInterfacePragmas || -- Pragmas can make them visible
370 opt_EnsureSplittableC || -- Splitting requires visiblilty
371 opt_AutoSccsOnAllToplevs -- ditto for profiling
372 -- (ToDo: fix up the auto-annotation
373 -- pass in the desugarer to avoid having
381 classifyOpts :: ([CoreToDo], -- Core-to-Core processing spec
382 [StgToDo]) -- STG-to-STG processing spec
384 classifyOpts = sep argv [] [] -- accumulators...
386 sep :: [FAST_STRING] -- cmd-line opts (input)
387 -> [CoreToDo] -> [StgToDo] -- to_do accumulators
388 -> ([CoreToDo], [StgToDo]) -- result
390 sep [] core_td stg_td -- all done!
391 = (reverse core_td, reverse stg_td)
393 # define CORE_TD(to_do) sep opts (to_do:core_td) stg_td
394 # define STG_TD(to_do) sep opts core_td (to_do:stg_td)
395 # define IGNORE_ARG() sep opts core_td stg_td
397 sep (opt1:opts) core_td stg_td
399 case (_UNPK_ opt1) of -- the non-"just match a string" options are at the end...
401 ',' : _ -> IGNORE_ARG() -- it is for the parser
403 "-fsimplify" -> -- gather up SimplifierSwitches specially...
404 simpl_sep opts defaultSimplSwitches core_td stg_td
406 "-fcalc-inlinings1"-> CORE_TD(CoreDoCalcInlinings1)
407 "-fcalc-inlinings2"-> CORE_TD(CoreDoCalcInlinings2)
408 "-ffloat-inwards" -> CORE_TD(CoreDoFloatInwards)
409 "-ffull-laziness" -> CORE_TD(CoreDoFullLaziness)
410 "-fliberate-case" -> CORE_TD(CoreLiberateCase)
411 "-fprint-core" -> CORE_TD(CoreDoPrintCore)
412 "-fstatic-args" -> CORE_TD(CoreDoStaticArgs)
413 "-fstrictness" -> CORE_TD(CoreDoStrictness)
414 "-fspecialise" -> CORE_TD(CoreDoSpecialising)
415 "-ffoldr-build-worker-wrapper" -> CORE_TD(CoreDoFoldrBuildWorkerWrapper)
416 "-ffoldr-build-ww-anal" -> CORE_TD(CoreDoFoldrBuildWWAnal)
418 "-fstg-static-args" -> STG_TD(StgDoStaticArgs)
419 "-fupdate-analysis" -> STG_TD(StgDoUpdateAnalysis)
420 "-dstg-stats" -> STG_TD(D_stg_stats)
421 "-flambda-lift" -> STG_TD(StgDoLambdaLift)
422 "-fmassage-stg-for-profiling" -> STG_TD(StgDoMassageForProfiling)
424 _ -> -- NB: the driver is really supposed to handle bad options
429 simpl_sep :: [FAST_STRING] -- cmd-line opts (input)
430 -> [SimplifierSwitch] -- simplifier-switch accumulator
431 -> [CoreToDo] -> [StgToDo] -- to_do accumulators
432 -> ([CoreToDo], [StgToDo]) -- result
434 -- "simpl_sep" tailcalls "sep" once it's seen one set
435 -- of SimplifierSwitches for a CoreDoSimplify.
438 simpl_sep input@[] simpl_sw core_td stg_td
439 = panic "simpl_sep []"
442 -- The SimplifierSwitches should be delimited by "[" and "]".
444 simpl_sep (opt1:opts) simpl_sw core_td stg_td
445 = case (_UNPK_ opt1) of
446 "[" -> simpl_sep opts simpl_sw core_td stg_td
448 this_simpl = CoreDoSimplify (isAmongSimpl simpl_sw)
450 sep opts (this_simpl : core_td) stg_td
452 # define SIMPL_SW(sw) simpl_sep opts (sw:simpl_sw) core_td stg_td
454 -- the non-"just match a string" options are at the end...
455 "-fshow-simplifier-progress" -> SIMPL_SW(ShowSimplifierProgress)
456 "-fcode-duplication-ok" -> SIMPL_SW(SimplOkToDupCode)
457 "-ffloat-lets-exposing-whnf" -> SIMPL_SW(SimplFloatLetsExposingWHNF)
458 "-ffloat-primops-ok" -> SIMPL_SW(SimplOkToFloatPrimOps)
459 "-falways-float-lets-from-lets" -> SIMPL_SW(SimplAlwaysFloatLetsFromLets)
460 "-fdo-case-elim" -> SIMPL_SW(SimplDoCaseElim)
461 "-fdo-lambda-eta-expansion" -> SIMPL_SW(SimplDoLambdaEtaExpansion)
462 "-fdo-foldr-build" -> SIMPL_SW(SimplDoFoldrBuild)
463 "-fdo-not-fold-back-append" -> SIMPL_SW(SimplDontFoldBackAppend)
464 "-fdo-arity-expand" -> SIMPL_SW(SimplDoArityExpand)
465 "-fdo-inline-foldr-build" -> SIMPL_SW(SimplDoInlineFoldrBuild)
466 "-freuse-con" -> SIMPL_SW(SimplReuseCon)
467 "-fcase-of-case" -> SIMPL_SW(SimplCaseOfCase)
468 "-fcase-merge" -> SIMPL_SW(SimplCaseMerge)
469 "-flet-to-case" -> SIMPL_SW(SimplLetToCase)
470 "-fpedantic-bottoms" -> SIMPL_SW(SimplPedanticBottoms)
471 "-fkeep-spec-pragma-ids" -> SIMPL_SW(KeepSpecPragmaIds)
472 "-fkeep-unused-bindings" -> SIMPL_SW(KeepUnusedBindings)
473 "-fmay-delete-conjurable-ids" -> SIMPL_SW(SimplMayDeleteConjurableIds)
474 "-fessential-unfoldings-only" -> SIMPL_SW(EssentialUnfoldingsOnly)
475 "-fignore-inline-pragma" -> SIMPL_SW(IgnoreINLINEPragma)
476 "-fno-let-from-case" -> SIMPL_SW(SimplNoLetFromCase)
477 "-fno-let-from-app" -> SIMPL_SW(SimplNoLetFromApp)
478 "-fno-let-from-strict-let" -> SIMPL_SW(SimplNoLetFromStrictLet)
480 o | starts_with_msi -> SIMPL_SW(MaxSimplifierIterations (read after_msi))
482 maybe_msi = startsWith "-fmax-simplifier-iterations" o
483 starts_with_msi = maybeToBool maybe_msi
484 (Just after_msi) = maybe_msi
486 _ -> -- NB: the driver is really supposed to handle bad options
487 simpl_sep opts simpl_sw core_td stg_td
490 %************************************************************************
492 \subsection{Switch ordering}
494 %************************************************************************
496 In spite of the @Produce*@ and @SccGroup@ constructors, these things
497 behave just like enumeration types.
500 instance Eq SimplifierSwitch where
501 a == b = tagOf_SimplSwitch a _EQ_ tagOf_SimplSwitch b
503 instance Ord SimplifierSwitch where
504 a < b = tagOf_SimplSwitch a _LT_ tagOf_SimplSwitch b
505 a <= b = tagOf_SimplSwitch a _LE_ tagOf_SimplSwitch b
507 tagOf_SimplSwitch SimplOkToDupCode =(ILIT(0) :: FAST_INT)
508 tagOf_SimplSwitch SimplFloatLetsExposingWHNF = ILIT(1)
509 tagOf_SimplSwitch SimplOkToFloatPrimOps = ILIT(2)
510 tagOf_SimplSwitch SimplAlwaysFloatLetsFromLets = ILIT(3)
511 tagOf_SimplSwitch SimplDoCaseElim = ILIT(4)
512 tagOf_SimplSwitch SimplReuseCon = ILIT(5)
513 tagOf_SimplSwitch SimplCaseOfCase = ILIT(6)
514 tagOf_SimplSwitch SimplLetToCase = ILIT(7)
515 tagOf_SimplSwitch SimplMayDeleteConjurableIds = ILIT(9)
516 tagOf_SimplSwitch SimplPedanticBottoms = ILIT(10)
517 tagOf_SimplSwitch SimplDoArityExpand = ILIT(11)
518 tagOf_SimplSwitch SimplDoFoldrBuild = ILIT(12)
519 tagOf_SimplSwitch SimplDoInlineFoldrBuild = ILIT(14)
520 tagOf_SimplSwitch IgnoreINLINEPragma = ILIT(15)
521 tagOf_SimplSwitch SimplDoLambdaEtaExpansion = ILIT(16)
522 tagOf_SimplSwitch EssentialUnfoldingsOnly = ILIT(19)
523 tagOf_SimplSwitch ShowSimplifierProgress = ILIT(20)
524 tagOf_SimplSwitch (MaxSimplifierIterations _) = ILIT(21)
525 tagOf_SimplSwitch KeepSpecPragmaIds = ILIT(25)
526 tagOf_SimplSwitch KeepUnusedBindings = ILIT(26)
527 tagOf_SimplSwitch SimplNoLetFromCase = ILIT(27)
528 tagOf_SimplSwitch SimplNoLetFromApp = ILIT(28)
529 tagOf_SimplSwitch SimplNoLetFromStrictLet = ILIT(29)
530 tagOf_SimplSwitch SimplDontFoldBackAppend = ILIT(30)
531 tagOf_SimplSwitch SimplCaseMerge = ILIT(31)
532 tagOf_SimplSwitch SimplCaseScrutinee = ILIT(32)
534 -- If you add anything here, be sure to change lAST_SIMPL_SWITCH_TAG, too!
536 tagOf_SimplSwitch _ = panic# "tagOf_SimplSwitch"
538 lAST_SIMPL_SWITCH_TAG = IBOX(tagOf_SimplSwitch SimplCaseScrutinee)
541 %************************************************************************
543 \subsection{Switch lookup}
545 %************************************************************************
548 #if __GLASGOW_HASKELL__ == 201
550 # define LIFT GHCbase.Lift
553 #elif __GLASGOW_HASKELL__ >= 202
559 # define ARRAY _Array
564 isAmongSimpl :: [SimplifierSwitch] -> SimplifierSwitch -> SwitchResult
566 isAmongSimpl on_switches -- Switches mentioned later occur *earlier*
567 -- in the list; defaults right at the end.
569 tidied_on_switches = foldl rm_dups [] on_switches
570 -- The fold*l* ensures that we keep the latest switches;
571 -- ie the ones that occur earliest in the list.
573 sw_tbl :: Array Int SwitchResult
575 sw_tbl = (array (0, lAST_SIMPL_SWITCH_TAG) -- bounds...
579 all_undefined = [ i SET_TO SwBool False | i <- [0 .. lAST_SIMPL_SWITCH_TAG ] ]
581 defined_elems = map mk_assoc_elem tidied_on_switches
583 -- (avoid some unboxing, bounds checking, and other horrible things:)
584 case sw_tbl of { ARRAY bounds_who_needs_'em stuff ->
586 case (indexArray# stuff (tagOf_SimplSwitch switch)) of
590 mk_assoc_elem k@(MaxSimplifierIterations lvl) = IBOX(tagOf_SimplSwitch k) SET_TO SwInt lvl
592 mk_assoc_elem k = IBOX(tagOf_SimplSwitch k) SET_TO SwBool True -- I'm here, Mom!
594 -- cannot have duplicates if we are going to use the array thing
595 rm_dups switches_so_far switch
596 = if switch `is_elem` switches_so_far
598 else switch : switches_so_far
600 sw `is_elem` [] = False
601 sw `is_elem` (s:ss) = (tagOf_SimplSwitch sw) _EQ_ (tagOf_SimplSwitch s)
605 Default settings for simplifier switches
608 defaultSimplSwitches = [MaxSimplifierIterations 1
612 %************************************************************************
614 \subsection{Misc functions for command-line options}
616 %************************************************************************
620 switchIsOn :: (switch -> SwitchResult) -> switch -> Bool
622 switchIsOn lookup_fn switch
623 = case (lookup_fn switch) of
624 SwBool False -> False
627 stringSwitchSet :: (switch -> SwitchResult)
628 -> (FAST_STRING -> switch)
631 stringSwitchSet lookup_fn switch
632 = case (lookup_fn (switch (panic "stringSwitchSet"))) of
633 SwString str -> Just str
636 intSwitchSet :: (switch -> SwitchResult)
640 intSwitchSet lookup_fn switch
641 = case (lookup_fn (switch (panic "intSwitchSet"))) of
642 SwInt int -> Just int