2 {-# OPTIONS -fno-warn-missing-fields #-}
3 -- The above warning supression flag is a temporary kludge.
4 -- While working on this module you are encouraged to remove it and fix
5 -- any warnings in the module. See
6 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
9 -----------------------------------------------------------------------------
13 -- Most flags are dynamic flags, which means they can change from
14 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
15 -- multi-session GHC each session can be using different dynamic
16 -- flags. Dynamic flags can also be set at the prompt in GHCi.
18 -- (c) The University of Glasgow 2005
20 -----------------------------------------------------------------------------
26 HscTarget(..), isObjectTarget, defaultObjectTarget,
27 GhcMode(..), isOneShot,
28 GhcLink(..), isNoLink,
34 -- Configuration of the core-to-core and stg-to-stg phases
38 SimplifierMode(..), FloatOutSwitches(..),
39 getCoreToDo, getStgToDo,
41 -- Manipulating DynFlags
42 defaultDynFlags, -- DynFlags
43 initDynFlags, -- DynFlags -> IO DynFlags
45 dopt, -- DynFlag -> DynFlags -> Bool
46 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
47 getOpts, -- (DynFlags -> [a]) -> IO [a]
58 machdepCCOpts, picCCOpts,
63 #include "HsVersions.h"
67 import PrelNames ( mAIN )
68 #ifdef i386_TARGET_ARCH
69 import StaticFlags ( opt_Static )
71 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
73 import {-# SOURCE #-} Packages (PackageState)
74 import DriverPhases ( Phase(..), phaseInputExt )
77 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
78 import Panic ( panic, GhcException(..) )
79 import UniqFM ( UniqFM )
81 import Maybes ( orElse, fromJust )
82 import SrcLoc ( SrcSpan )
84 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
86 import Data.IORef ( readIORef )
87 import Control.Exception ( throwDyn )
88 import Control.Monad ( when )
91 import System.FilePath
92 import System.IO ( hPutStrLn, stderr )
94 -- -----------------------------------------------------------------------------
102 | Opt_D_dump_cmmz_pretty
106 | Opt_D_dump_asm_native
107 | Opt_D_dump_asm_liveness
108 | Opt_D_dump_asm_coalesce
109 | Opt_D_dump_asm_regalloc
110 | Opt_D_dump_asm_regalloc_stages
111 | Opt_D_dump_asm_conflicts
112 | Opt_D_dump_asm_stats
118 | Opt_D_dump_inlinings
119 | Opt_D_dump_rule_firings
120 | Opt_D_dump_occur_anal
124 | Opt_D_dump_simpl_iterations
125 | Opt_D_dump_simpl_phases
134 | Opt_D_dump_worker_wrapper
135 | Opt_D_dump_rn_trace
136 | Opt_D_dump_rn_stats
138 | Opt_D_dump_simpl_stats
139 | Opt_D_dump_tc_trace
140 | Opt_D_dump_if_trace
146 | Opt_D_verbose_core2core
147 | Opt_D_verbose_stg2stg
149 | Opt_D_dump_hi_diffs
150 | Opt_D_dump_minimal_imports
151 | Opt_D_dump_mod_cycles
152 | Opt_D_dump_view_pattern_commoning
153 | Opt_D_faststring_stats
154 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
160 | Opt_WarnIsError -- -Werror; makes warnings fatal
161 | Opt_WarnDuplicateExports
163 | Opt_WarnImplicitPrelude
164 | Opt_WarnIncompletePatterns
165 | Opt_WarnIncompletePatternsRecUpd
166 | Opt_WarnMissingFields
167 | Opt_WarnMissingMethods
168 | Opt_WarnMissingSigs
169 | Opt_WarnNameShadowing
170 | Opt_WarnOverlappingPatterns
171 | Opt_WarnSimplePatterns
172 | Opt_WarnTypeDefaults
173 | Opt_WarnMonomorphism
174 | Opt_WarnUnusedBinds
175 | Opt_WarnUnusedImports
176 | Opt_WarnUnusedMatches
177 | Opt_WarnDeprecations
178 | Opt_WarnDodgyImports
183 | Opt_OverlappingInstances
184 | Opt_UndecidableInstances
185 | Opt_IncoherentInstances
186 | Opt_MonomorphismRestriction
188 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
189 | Opt_ForeignFunctionInterface
190 | Opt_UnliftedFFITypes
191 | Opt_PArr -- Syntactic support for parallel arrays
192 | Opt_Arrows -- Arrow-notation syntax
193 | Opt_TemplateHaskell
197 | Opt_ImplicitPrelude
198 | Opt_ScopedTypeVariables
202 | Opt_OverloadedStrings
203 | Opt_DisambiguateRecordFields
204 | Opt_RecordWildCards
209 | Opt_StandaloneDeriving
210 | Opt_DeriveDataTypeable
211 | Opt_TypeSynonymInstances
212 | Opt_FlexibleContexts
213 | Opt_FlexibleInstances
214 | Opt_ConstrainedClassMethods
215 | Opt_MultiParamTypeClasses
216 | Opt_FunctionalDependencies
218 | Opt_PolymorphicComponents
219 | Opt_ExistentialQuantification
223 | Opt_PatternSignatures
224 | Opt_ParallelListComp
225 | Opt_TransformListComp
226 | Opt_GeneralizedNewtypeDeriving
229 | Opt_LiberalTypeSynonyms
232 | Opt_ImpredicativeTypes
235 | Opt_PrintExplicitForalls
243 | Opt_IgnoreInterfacePragmas
244 | Opt_OmitInterfacePragmas
245 | Opt_DoLambdaEtaExpansion
249 | Opt_UnboxStrictFields
253 | Opt_RegsGraph -- do graph coloring register allocation
254 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
262 | Opt_ExcessPrecision
263 | Opt_ReadUserPackageConf
267 | Opt_HideAllPackages
268 | Opt_PrintBindResult
272 | Opt_BreakOnException
274 | Opt_PrintEvldWithShow
275 | Opt_PrintBindContents
279 | Opt_ConvertToZipCfgAndBack
290 data DynFlags = DynFlags {
293 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
294 stgToDo :: Maybe [StgToDo], -- similarly
295 hscTarget :: HscTarget,
296 hscOutName :: String, -- name of the output file
297 extCoreName :: String, -- name of the .core output file
298 verbosity :: Int, -- verbosity level
299 optLevel :: Int, -- optimisation level
300 simplPhases :: Int, -- number of simplifier phases
301 maxSimplIterations :: Int, -- max simplifier iterations
302 shouldDumpSimplPhase :: SimplifierMode -> Bool,
303 ruleCheck :: Maybe String,
305 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
306 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
307 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
309 stolen_x86_regs :: Int,
310 cmdlineHcIncludes :: [String], -- -#includes
311 importPaths :: [FilePath],
313 mainFunIs :: Maybe String,
314 ctxtStkDepth :: Int, -- Typechecker context stack depth
316 thisPackage :: PackageId,
319 wayNames :: [WayName], -- way flags from the cmd line
320 buildTag :: String, -- the global "way" (eg. "p" for prof)
321 rtsBuildTag :: String, -- the RTS "way"
324 objectDir :: Maybe String,
325 hiDir :: Maybe String,
326 stubDir :: Maybe String,
332 outputFile :: Maybe String,
333 outputHi :: Maybe String,
334 dynLibLoader :: DynLibLoader,
336 -- | This is set by DriverPipeline.runPipeline based on where
337 -- its output is going.
338 dumpPrefix :: Maybe FilePath,
340 -- | Override the dumpPrefix set by runPipeline.
341 -- Set by -ddump-file-prefix
342 dumpPrefixForce :: Maybe FilePath,
344 includePaths :: [String],
345 libraryPaths :: [String],
346 frameworkPaths :: [String], -- used on darwin only
347 cmdlineFrameworks :: [String], -- ditto
348 tmpDir :: String, -- no trailing '/'
350 ghcUsagePath :: FilePath, -- Filled in by SysTools
351 ghciUsagePath :: FilePath, -- ditto
353 hpcDir :: String, -- ^ path to store the .mix files
355 -- options for particular phases
364 opt_windres :: [String],
366 -- commands for particular phases
368 pgm_P :: (String,[Option]),
370 pgm_c :: (String,[Option]),
371 pgm_m :: (String,[Option]),
372 pgm_s :: (String,[Option]),
373 pgm_a :: (String,[Option]),
374 pgm_l :: (String,[Option]),
375 pgm_dll :: (String,[Option]),
377 pgm_sysman :: String,
378 pgm_windres :: String,
381 extraPkgConfs :: [FilePath],
382 topDir :: FilePath, -- filled in by SysTools
383 systemPackageConfig :: FilePath, -- ditto
384 -- The -package-conf flags given on the command line, in the order
387 packageFlags :: [PackageFlag],
388 -- The -package and -hide-package flags from the command-line
391 -- NB. do not modify this field, it is calculated by
392 -- Packages.initPackages and Packages.updatePackages.
393 pkgDatabase :: Maybe (UniqFM PackageConfig),
394 pkgState :: PackageState,
400 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
402 haddockOptions :: Maybe String
413 -- | will this target result in an object file on the disk?
414 isObjectTarget :: HscTarget -> Bool
415 isObjectTarget HscC = True
416 isObjectTarget HscAsm = True
417 isObjectTarget _ = False
419 -- | The 'GhcMode' tells us whether we're doing multi-module
420 -- compilation (controlled via the "GHC" API) or one-shot
421 -- (single-module) compilation. This makes a difference primarily to
422 -- the "Finder": in one-shot mode we look for interface files for
423 -- imported modules, but in multi-module mode we look for source files
424 -- in order to check whether they need to be recompiled.
426 = CompManager -- ^ --make, GHCi, etc.
427 | OneShot -- ^ ghc -c Foo.hs
428 | MkDepend -- ^ ghc -M, see Finder for why we need this
431 isOneShot :: GhcMode -> Bool
432 isOneShot OneShot = True
433 isOneShot _other = False
435 -- | What kind of linking to do.
436 data GhcLink -- What to do in the link step, if there is one
437 = NoLink -- Don't link at all
438 | LinkBinary -- Link object code into a binary
439 | LinkInMemory -- Use the in-memory dynamic linker
440 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
443 isNoLink :: GhcLink -> Bool
444 isNoLink NoLink = True
448 = ExposePackage String
450 | IgnorePackage String
453 defaultHscTarget :: HscTarget
454 defaultHscTarget = defaultObjectTarget
456 -- | the 'HscTarget' value corresponding to the default way to create
457 -- object files on the current platform.
458 defaultObjectTarget :: HscTarget
460 | cGhcWithNativeCodeGen == "YES" = HscAsm
465 | Wrapped (Maybe String)
469 initDynFlags :: DynFlags -> IO DynFlags
470 initDynFlags dflags = do
471 -- someday these will be dynamic flags
472 ways <- readIORef v_Ways
473 build_tag <- readIORef v_Build_tag
474 rts_build_tag <- readIORef v_RTS_Build_tag
477 buildTag = build_tag,
478 rtsBuildTag = rts_build_tag
481 defaultDynFlags :: DynFlags
484 ghcMode = CompManager,
485 ghcLink = LinkBinary,
488 hscTarget = defaultHscTarget,
494 maxSimplIterations = 4,
495 shouldDumpSimplPhase = const False,
497 specConstrThreshold = Just 200,
498 specConstrCount = Just 3,
499 liberateCaseThreshold = Just 200,
501 cmdlineHcIncludes = [],
505 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
507 thisPackage = mainPackageId,
513 objectSuf = phaseInputExt StopLn,
514 hcSuf = phaseInputExt HCc,
517 outputFile = Nothing,
519 dynLibLoader = Deployable,
520 dumpPrefix = Nothing,
521 dumpPrefixForce = Nothing,
525 cmdlineFrameworks = [],
526 tmpDir = cDEFAULT_TMPDIR,
544 pkgDatabase = Nothing,
545 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
546 haddockOptions = Nothing,
548 Opt_ReadUserPackageConf,
550 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
551 -- behaviour the default, to see if anyone notices
555 Opt_MonomorphismRestriction,
561 Opt_PrintBindContents
563 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
564 -- The default -O0 options
567 log_action = \severity srcSpan style msg ->
569 SevInfo -> hPutStrLn stderr (show (msg style))
570 SevFatal -> hPutStrLn stderr (show (msg style))
571 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
577 0 | print errors & warnings only
578 1 | minimal verbosity: print "compiling M ... done." for each module.
579 2 | equivalent to -dshow-passes
580 3 | equivalent to existing "ghc -v"
581 4 | "ghc -v -ddump-most"
582 5 | "ghc -v -ddump-all"
585 dopt :: DynFlag -> DynFlags -> Bool
586 dopt f dflags = f `elem` (flags dflags)
588 dopt_set :: DynFlags -> DynFlag -> DynFlags
589 dopt_set dfs f = dfs{ flags = f : flags dfs }
591 dopt_unset :: DynFlags -> DynFlag -> DynFlags
592 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
594 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
595 getOpts dflags opts = reverse (opts dflags)
596 -- We add to the options from the front, so we need to reverse the list
598 getVerbFlag :: DynFlags -> String
600 | verbosity dflags >= 3 = "-v"
603 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
604 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
605 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
606 addCmdlineFramework, addHaddockOpts
607 :: String -> DynFlags -> DynFlags
608 setOutputFile, setOutputHi, setDumpPrefixForce
609 :: Maybe String -> DynFlags -> DynFlags
611 setObjectDir f d = d{ objectDir = Just f}
612 setHiDir f d = d{ hiDir = Just f}
613 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
614 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
615 -- #included from the .hc file when compiling with -fvia-C.
617 setObjectSuf f d = d{ objectSuf = f}
618 setHiSuf f d = d{ hiSuf = f}
619 setHcSuf f d = d{ hcSuf = f}
621 setOutputFile f d = d{ outputFile = f}
622 setOutputHi f d = d{ outputHi = f}
624 parseDynLibLoaderMode f d =
626 ("deploy", "") -> d{ dynLibLoader = Deployable }
627 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
628 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
629 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
630 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
631 (_,_) -> error "Unknown dynlib loader"
633 setDumpPrefixForce f d = d { dumpPrefixForce = f}
635 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
636 -- Config.hs should really use Option.
637 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
639 setPgmL f d = d{ pgm_L = f}
640 setPgmF f d = d{ pgm_F = f}
641 setPgmc f d = d{ pgm_c = (f,[])}
642 setPgmm f d = d{ pgm_m = (f,[])}
643 setPgms f d = d{ pgm_s = (f,[])}
644 setPgma f d = d{ pgm_a = (f,[])}
645 setPgml f d = d{ pgm_l = (f,[])}
646 setPgmdll f d = d{ pgm_dll = (f,[])}
647 setPgmwindres f d = d{ pgm_windres = f}
649 addOptL f d = d{ opt_L = f : opt_L d}
650 addOptP f d = d{ opt_P = f : opt_P d}
651 addOptF f d = d{ opt_F = f : opt_F d}
652 addOptc f d = d{ opt_c = f : opt_c d}
653 addOptm f d = d{ opt_m = f : opt_m d}
654 addOpta f d = d{ opt_a = f : opt_a d}
655 addOptl f d = d{ opt_l = f : opt_l d}
656 addOptdep f d = d{ opt_dep = f : opt_dep d}
657 addOptwindres f d = d{ opt_windres = f : opt_windres d}
659 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
661 addHaddockOpts f d = d{ haddockOptions = Just f}
663 -- -----------------------------------------------------------------------------
664 -- Command-line options
666 -- When invoking external tools as part of the compilation pipeline, we
667 -- pass these a sequence of options on the command-line. Rather than
668 -- just using a list of Strings, we use a type that allows us to distinguish
669 -- between filepaths and 'other stuff'. [The reason being, of course, that
670 -- this type gives us a handle on transforming filenames, and filenames only,
671 -- to whatever format they're expected to be on a particular platform.]
674 = FileOption -- an entry that _contains_ filename(s) / filepaths.
675 String -- a non-filepath prefix that shouldn't be
676 -- transformed (e.g., "/out=")
677 String -- the filepath/filename portion
680 -----------------------------------------------------------------------------
681 -- Setting the optimisation level
683 updOptLevel :: Int -> DynFlags -> DynFlags
684 -- Set dynflags appropriate to the optimisation level
686 = dfs2{ optLevel = final_n }
688 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
689 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
690 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
692 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
693 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
695 optLevelFlags :: [([Int], DynFlag)]
697 = [ ([0], Opt_IgnoreInterfacePragmas)
698 , ([0], Opt_OmitInterfacePragmas)
700 , ([1,2], Opt_IgnoreAsserts)
701 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
703 , ([1,2], Opt_DoEtaReduction)
704 , ([1,2], Opt_CaseMerge)
705 , ([1,2], Opt_Strictness)
707 , ([1,2], Opt_FullLaziness)
709 , ([2], Opt_LiberateCase)
710 , ([2], Opt_SpecConstr)
712 , ([0,1,2], Opt_DoLambdaEtaExpansion)
713 -- This one is important for a tiresome reason:
714 -- we want to make sure that the bindings for data
715 -- constructors are eta-expanded. This is probably
716 -- a good thing anyway, but it seems fragile.
719 -- -----------------------------------------------------------------------------
720 -- Standard sets of warning options
722 standardWarnings :: [DynFlag]
724 = [ Opt_WarnDeprecations,
725 Opt_WarnOverlappingPatterns,
726 Opt_WarnMissingFields,
727 Opt_WarnMissingMethods,
728 Opt_WarnDuplicateExports
731 minusWOpts :: [DynFlag]
733 = standardWarnings ++
734 [ Opt_WarnUnusedBinds,
735 Opt_WarnUnusedMatches,
736 Opt_WarnUnusedImports,
737 Opt_WarnIncompletePatterns,
741 minusWallOpts :: [DynFlag]
744 [ Opt_WarnTypeDefaults,
745 Opt_WarnNameShadowing,
751 -- minuswRemovesOpts should be every warning option
752 minuswRemovesOpts :: [DynFlag]
755 [Opt_WarnImplicitPrelude,
756 Opt_WarnIncompletePatternsRecUpd,
757 Opt_WarnSimplePatterns,
758 Opt_WarnMonomorphism,
762 -- -----------------------------------------------------------------------------
763 -- CoreToDo: abstraction of core-to-core passes to run.
765 data CoreToDo -- These are diff core-to-core passes,
766 -- which may be invoked in any order,
767 -- as many times as you like.
769 = CoreDoSimplify -- The core-to-core simplifier.
772 -- Each run of the simplifier can take a different
773 -- set of simplifier-specific flags.
775 | CoreDoFloatOutwards FloatOutSwitches
780 | CoreDoWorkerWrapper
783 | CoreDoOldStrictness
786 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
787 -- matching this string
788 | CoreDoVectorisation
789 | CoreDoNothing -- Useful when building up
790 | CoreDoPasses [CoreToDo] -- lists of these things
792 data SimplifierMode -- See comments in SimplMonad
794 | SimplPhase Int [String]
796 data SimplifierSwitch
797 = MaxSimplifierIterations Int
800 data FloatOutSwitches
801 = FloatOutSw Bool -- True <=> float lambdas to top level
802 Bool -- True <=> float constants to top level,
803 -- even if they do not escape a lambda
806 -- The core-to-core pass ordering is derived from the DynFlags:
807 runWhen :: Bool -> CoreToDo -> CoreToDo
808 runWhen True do_this = do_this
809 runWhen False _ = CoreDoNothing
811 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
812 runMaybe (Just x) f = f x
813 runMaybe Nothing _ = CoreDoNothing
815 getCoreToDo :: DynFlags -> [CoreToDo]
817 | Just todo <- coreToDo dflags = todo -- set explicitly by user
818 | otherwise = core_todo
820 opt_level = optLevel dflags
821 phases = simplPhases dflags
822 max_iter = maxSimplIterations dflags
823 strictness = dopt Opt_Strictness dflags
824 full_laziness = dopt Opt_FullLaziness dflags
825 cse = dopt Opt_CSE dflags
826 spec_constr = dopt Opt_SpecConstr dflags
827 liberate_case = dopt Opt_LiberateCase dflags
828 rule_check = ruleCheck dflags
829 vectorisation = dopt Opt_Vectorise dflags
831 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
833 simpl_phase phase names iter
835 [ CoreDoSimplify (SimplPhase phase names) [
836 MaxSimplifierIterations iter
838 maybe_rule_check phase
841 -- By default, we have 2 phases before phase 0.
843 -- Want to run with inline phase 2 after the specialiser to give
844 -- maximum chance for fusion to work before we inline build/augment
845 -- in phase 1. This made a difference in 'ansi' where an
846 -- overloaded function wasn't inlined till too late.
848 -- Need phase 1 so that build/augment get
849 -- inlined. I found that spectral/hartel/genfft lost some useful
850 -- strictness in the function sumcode' if augment is not inlined
851 -- before strictness analysis runs
852 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
853 | phase <- [phases, phases-1 .. 1] ]
856 -- initial simplify: mk specialiser happy: minimum effort please
857 simpl_gently = CoreDoSimplify SimplGently [
859 -- Don't inline anything till full laziness has bitten
860 -- In particular, inlining wrappers inhibits floating
861 -- e.g. ...(case f x of ...)...
862 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
863 -- ==> ...(case x of I# x# -> case fw x# of ...)...
864 -- and now the redex (f x) isn't floatable any more
865 -- Similarly, don't apply any rules until after full
866 -- laziness. Notably, list fusion can prevent floating.
868 NoCaseOfCase, -- Don't do case-of-case transformations.
869 -- This makes full laziness work better
870 MaxSimplifierIterations max_iter
874 if opt_level == 0 then
875 [simpl_phase 0 ["final"] max_iter]
876 else {- opt_level >= 1 -} [
878 -- initial simplify: mk specialiser happy: minimum effort please
881 -- We run vectorisation here for now, but we might also try to run
883 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
885 -- Specialisation is best done before full laziness
886 -- so that overloaded functions have all their dictionary lambdas manifest
889 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
895 -- Phase 0: allow all Ids to be inlined now
896 -- This gets foldr inlined before strictness analysis
898 -- At least 3 iterations because otherwise we land up with
899 -- huge dead expressions because of an infelicity in the
901 -- let k = BIG in foldr k z xs
902 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
903 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
905 simpl_phase 0 ["main"] (max max_iter 3),
908 #ifdef OLD_STRICTNESS
911 runWhen strictness (CoreDoPasses [
915 simpl_phase 0 ["post-worker-wrapper"] max_iter
918 runWhen full_laziness
919 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
920 True)), -- Float constants
921 -- nofib/spectral/hartel/wang doubles in speed if you
922 -- do full laziness late in the day. It only happens
923 -- after fusion and other stuff, so the early pass doesn't
924 -- catch it. For the record, the redex is
925 -- f_el22 (f_el21 r_midblock)
929 -- We want CSE to follow the final full-laziness pass, because it may
930 -- succeed in commoning up things floated out by full laziness.
931 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
937 -- Case-liberation for -O2. This should be after
938 -- strictness analysis and the simplification which follows it.
939 runWhen liberate_case (CoreDoPasses [
941 simpl_phase 0 ["post-liberate-case"] max_iter
942 ]), -- Run the simplifier after LiberateCase to vastly
943 -- reduce the possiblility of shadowing
944 -- Reason: see Note [Shadowing] in SpecConstr.lhs
946 runWhen spec_constr CoreDoSpecConstr,
950 -- Final clean-up simplification:
951 simpl_phase 0 ["final"] max_iter
954 -- -----------------------------------------------------------------------------
955 -- StgToDo: abstraction of stg-to-stg passes to run.
958 = StgDoMassageForProfiling -- should be (next to) last
959 -- There's also setStgVarInfo, but its absolute "lastness"
960 -- is so critical that it is hardwired in (no flag).
963 getStgToDo :: DynFlags -> [StgToDo]
965 | Just todo <- stgToDo dflags = todo -- set explicitly by user
968 stg_stats = dopt Opt_StgStats dflags
970 todo1 = if stg_stats then [D_stg_stats] else []
972 todo2 | WayProf `elem` wayNames dflags
973 = StgDoMassageForProfiling : todo1
977 -- -----------------------------------------------------------------------------
981 allFlags = map ('-':) $
982 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
983 map ("fno-"++) flags ++
987 where ok (PrefixPred _ _) = False
989 flags = map fst fFlags
992 dynamic_flags :: [(String, OptKind DynP)]
994 ( "n" , NoArg (setDynFlag Opt_DryRun) )
995 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
996 , ( "F" , NoArg (setDynFlag Opt_Pp))
997 , ( "#include" , HasArg (addCmdlineHCInclude) )
998 , ( "v" , OptIntSuffix setVerbosity )
1000 ------- Specific phases --------------------------------------------
1001 , ( "pgmL" , HasArg (upd . setPgmL) )
1002 , ( "pgmP" , HasArg (upd . setPgmP) )
1003 , ( "pgmF" , HasArg (upd . setPgmF) )
1004 , ( "pgmc" , HasArg (upd . setPgmc) )
1005 , ( "pgmm" , HasArg (upd . setPgmm) )
1006 , ( "pgms" , HasArg (upd . setPgms) )
1007 , ( "pgma" , HasArg (upd . setPgma) )
1008 , ( "pgml" , HasArg (upd . setPgml) )
1009 , ( "pgmdll" , HasArg (upd . setPgmdll) )
1010 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
1012 , ( "optL" , HasArg (upd . addOptL) )
1013 , ( "optP" , HasArg (upd . addOptP) )
1014 , ( "optF" , HasArg (upd . addOptF) )
1015 , ( "optc" , HasArg (upd . addOptc) )
1016 , ( "optm" , HasArg (upd . addOptm) )
1017 , ( "opta" , HasArg (upd . addOpta) )
1018 , ( "optl" , HasArg (upd . addOptl) )
1019 , ( "optdep" , HasArg (upd . addOptdep) )
1020 , ( "optwindres" , HasArg (upd . addOptwindres) )
1022 , ( "split-objs" , NoArg (if can_split
1023 then setDynFlag Opt_SplitObjs
1026 -------- Linking ----------------------------------------------------
1027 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1028 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1029 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1030 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1032 ------- Libraries ---------------------------------------------------
1033 , ( "L" , Prefix addLibraryPath )
1034 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1036 ------- Frameworks --------------------------------------------------
1037 -- -framework-path should really be -F ...
1038 , ( "framework-path" , HasArg addFrameworkPath )
1039 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1041 ------- Output Redirection ------------------------------------------
1042 , ( "odir" , HasArg (upd . setObjectDir))
1043 , ( "o" , SepArg (upd . setOutputFile . Just))
1044 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1045 , ( "osuf" , HasArg (upd . setObjectSuf))
1046 , ( "hcsuf" , HasArg (upd . setHcSuf))
1047 , ( "hisuf" , HasArg (upd . setHiSuf))
1048 , ( "hidir" , HasArg (upd . setHiDir))
1049 , ( "tmpdir" , HasArg (upd . setTmpDir))
1050 , ( "stubdir" , HasArg (upd . setStubDir))
1051 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1053 ------- Keeping temporary files -------------------------------------
1054 -- These can be singular (think ghc -c) or plural (think ghc --make)
1055 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1056 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1057 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1058 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1059 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1060 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1061 -- This only makes sense as plural
1062 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1064 ------- Miscellaneous ----------------------------------------------
1065 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1066 , ( "main-is" , SepArg setMainIs )
1067 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1068 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1069 , ( "hpcdir" , SepArg setOptHpcDir )
1071 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1072 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1073 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1075 ------- Packages ----------------------------------------------------
1076 , ( "package-conf" , HasArg extraPkgConf_ )
1077 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1078 , ( "package-name" , HasArg (upd . setPackageName) )
1079 , ( "package" , HasArg exposePackage )
1080 , ( "hide-package" , HasArg hidePackage )
1081 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1082 , ( "ignore-package" , HasArg ignorePackage )
1083 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1085 ------ HsCpp opts ---------------------------------------------------
1086 , ( "D", AnySuffix (upd . addOptP) )
1087 , ( "U", AnySuffix (upd . addOptP) )
1089 ------- Include/Import Paths ----------------------------------------
1090 , ( "I" , Prefix addIncludePath)
1091 , ( "i" , OptPrefix addImportPath )
1093 ------ Debugging ----------------------------------------------------
1094 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1096 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1097 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1098 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1099 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1100 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1101 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1102 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1103 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1104 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1105 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1106 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1107 , ( "ddump-asm-regalloc-stages",
1108 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1109 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1110 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1111 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1112 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1113 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1114 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1115 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1116 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1117 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1118 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1119 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1120 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1121 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1122 , ( "ddump-simpl-phases", OptPrefix setDumpSimplPhases)
1123 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1124 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1125 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1126 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1127 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1128 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1129 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1130 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1131 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1132 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1133 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1134 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1135 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1136 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1137 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1138 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1139 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1140 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1141 , ( "dverbose-core2core", NoArg setVerboseCore2Core)
1142 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1143 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1144 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1145 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1146 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1147 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1148 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1149 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1150 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1151 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1152 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1153 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1154 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1155 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1156 setVerbosity (Just 2)) )
1157 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1159 ------ Machine dependant (-m<blah>) stuff ---------------------------
1161 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1162 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1163 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1165 ------ Warning opts -------------------------------------------------
1166 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1167 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1168 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1169 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1170 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1171 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1173 ------ Optimisation flags ------------------------------------------
1174 , ( "O" , NoArg (upd (setOptLevel 1)))
1175 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1176 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1177 -- If the number is missing, use 1
1179 , ( "fsimplifier-phases", IntSuffix (\n ->
1180 upd (\dfs -> dfs{ simplPhases = n })) )
1181 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1182 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1184 , ( "fspec-constr-threshold", IntSuffix (\n ->
1185 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1186 , ( "fno-spec-constr-threshold", NoArg (
1187 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1188 , ( "fspec-constr-count", IntSuffix (\n ->
1189 upd (\dfs -> dfs{ specConstrCount = Just n })))
1190 , ( "fno-spec-constr-count", NoArg (
1191 upd (\dfs -> dfs{ specConstrCount = Nothing })))
1192 , ( "fliberate-case-threshold", IntSuffix (\n ->
1193 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1194 , ( "fno-liberate-case-threshold", NoArg (
1195 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1197 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1198 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1200 ------ Compiler flags -----------------------------------------------
1202 , ( "fasm", NoArg (setObjTarget HscAsm) )
1203 , ( "fvia-c", NoArg (setObjTarget HscC) )
1204 , ( "fvia-C", NoArg (setObjTarget HscC) )
1206 , ( "fno-code", NoArg (setTarget HscNothing))
1207 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1208 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1210 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1211 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1213 -- the rest of the -f* and -fno-* flags
1214 , ( "f", PrefixPred (isFlag fFlags)
1215 (\f -> setDynFlag (getFlag fFlags f)) )
1216 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1217 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1219 -- the -X* and -XNo* flags
1220 , ( "X", PrefixPred (isFlag xFlags)
1221 (\f -> setDynFlag (getFlag xFlags f)) )
1222 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1223 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1226 -- these -f<blah> flags can all be reversed with -fno-<blah>
1228 fFlags :: [(String, DynFlag)]
1230 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1231 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1232 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1233 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1234 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1235 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1236 ( "warn-missing-fields", Opt_WarnMissingFields ),
1237 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1238 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1239 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1240 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1241 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1242 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1243 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1244 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1245 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1246 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1247 ( "warn-deprecations", Opt_WarnDeprecations ),
1248 ( "warn-orphans", Opt_WarnOrphans ),
1249 ( "warn-tabs", Opt_WarnTabs ),
1250 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1251 ( "strictness", Opt_Strictness ),
1252 ( "full-laziness", Opt_FullLaziness ),
1253 ( "liberate-case", Opt_LiberateCase ),
1254 ( "spec-constr", Opt_SpecConstr ),
1256 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1257 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1258 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1259 ( "ignore-asserts", Opt_IgnoreAsserts ),
1260 ( "do-eta-reduction", Opt_DoEtaReduction ),
1261 ( "case-merge", Opt_CaseMerge ),
1262 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1263 ( "dicts-cheap", Opt_DictsCheap ),
1264 ( "excess-precision", Opt_ExcessPrecision ),
1265 ( "asm-mangling", Opt_DoAsmMangling ),
1266 ( "print-bind-result", Opt_PrintBindResult ),
1267 ( "force-recomp", Opt_ForceRecomp ),
1268 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1269 ( "rewrite-rules", Opt_RewriteRules ),
1270 ( "break-on-exception", Opt_BreakOnException ),
1271 ( "break-on-error", Opt_BreakOnError ),
1272 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1273 ( "print-bind-contents", Opt_PrintBindContents ),
1274 ( "run-cps", Opt_RunCPSZ ),
1275 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1276 ( "vectorise", Opt_Vectorise ),
1277 ( "regs-graph", Opt_RegsGraph),
1278 ( "regs-iterative", Opt_RegsIterative),
1279 -- Deprecated in favour of -XTemplateHaskell:
1280 ( "th", Opt_TemplateHaskell ),
1281 -- Deprecated in favour of -XForeignFunctionInterface:
1282 ( "fi", Opt_ForeignFunctionInterface ),
1283 -- Deprecated in favour of -XForeignFunctionInterface:
1284 ( "ffi", Opt_ForeignFunctionInterface ),
1285 -- Deprecated in favour of -XArrows:
1286 ( "arrows", Opt_Arrows ),
1287 -- Deprecated in favour of -XGenerics:
1288 ( "generics", Opt_Generics ),
1289 -- Deprecated in favour of -XImplicitPrelude:
1290 ( "implicit-prelude", Opt_ImplicitPrelude ),
1291 -- Deprecated in favour of -XBangPatterns:
1292 ( "bang-patterns", Opt_BangPatterns ),
1293 -- Deprecated in favour of -XMonomorphismRestriction:
1294 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1295 -- Deprecated in favour of -XMonoPatBinds:
1296 ( "mono-pat-binds", Opt_MonoPatBinds ),
1297 -- Deprecated in favour of -XExtendedDefaultRules:
1298 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1299 -- Deprecated in favour of -XImplicitParams:
1300 ( "implicit-params", Opt_ImplicitParams ),
1301 -- Deprecated in favour of -XScopedTypeVariables:
1302 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1303 -- Deprecated in favour of -XPArr:
1304 ( "parr", Opt_PArr ),
1305 -- Deprecated in favour of -XOverlappingInstances:
1306 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1307 -- Deprecated in favour of -XUndecidableInstances:
1308 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1309 -- Deprecated in favour of -XIncoherentInstances:
1310 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1311 ( "gen-manifest", Opt_GenManifest ),
1312 ( "embed-manifest", Opt_EmbedManifest )
1315 supportedLanguages :: [String]
1316 supportedLanguages = map fst xFlags
1318 -- These -X<blah> flags can all be reversed with -XNo<blah>
1319 xFlags :: [(String, DynFlag)]
1322 ( "PatternGuards", Opt_PatternGuards ),
1323 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1324 ( "MagicHash", Opt_MagicHash ),
1325 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1326 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1327 ( "KindSignatures", Opt_KindSignatures ),
1328 ( "PatternSignatures", Opt_PatternSignatures ),
1329 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1330 ( "ParallelListComp", Opt_ParallelListComp ),
1331 ( "TransformListComp", Opt_TransformListComp ),
1332 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1333 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1334 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1335 ( "Rank2Types", Opt_Rank2Types ),
1336 ( "RankNTypes", Opt_RankNTypes ),
1337 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1338 ( "TypeOperators", Opt_TypeOperators ),
1339 ( "RecursiveDo", Opt_RecursiveDo ),
1340 ( "Arrows", Opt_Arrows ),
1341 ( "PArr", Opt_PArr ),
1342 ( "TemplateHaskell", Opt_TemplateHaskell ),
1343 ( "QuasiQuotes", Opt_QuasiQuotes ),
1344 ( "Generics", Opt_Generics ),
1346 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1347 ( "RecordWildCards", Opt_RecordWildCards ),
1348 ( "RecordPuns", Opt_RecordPuns ),
1349 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1350 ( "OverloadedStrings", Opt_OverloadedStrings ),
1351 ( "GADTs", Opt_GADTs ),
1352 ( "ViewPatterns", Opt_ViewPatterns),
1353 ( "TypeFamilies", Opt_TypeFamilies ),
1354 ( "BangPatterns", Opt_BangPatterns ),
1356 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1357 -- On by default (which is not strictly H98):
1358 ( "MonoPatBinds", Opt_MonoPatBinds ),
1359 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1360 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1361 ( "ImplicitParams", Opt_ImplicitParams ),
1362 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1363 ( "UnboxedTuples", Opt_UnboxedTuples ),
1364 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1365 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1366 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1367 ( "FlexibleContexts", Opt_FlexibleContexts ),
1368 ( "FlexibleInstances", Opt_FlexibleInstances ),
1369 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1370 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1371 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1372 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1373 ( "OverlappingInstances", Opt_OverlappingInstances ),
1374 ( "UndecidableInstances", Opt_UndecidableInstances ),
1375 ( "IncoherentInstances", Opt_IncoherentInstances )
1378 impliedFlags :: [(DynFlag, [DynFlag])]
1380 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1381 -- be completely rigid for GADTs
1382 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1383 -- Note [Scoped tyvars] in TcBinds
1386 glasgowExtsFlags :: [DynFlag]
1387 glasgowExtsFlags = [
1388 Opt_PrintExplicitForalls
1389 , Opt_ForeignFunctionInterface
1390 , Opt_UnliftedFFITypes
1392 , Opt_ImplicitParams
1393 , Opt_ScopedTypeVariables
1395 , Opt_TypeSynonymInstances
1396 , Opt_StandaloneDeriving
1397 , Opt_DeriveDataTypeable
1398 , Opt_FlexibleContexts
1399 , Opt_FlexibleInstances
1400 , Opt_ConstrainedClassMethods
1401 , Opt_MultiParamTypeClasses
1402 , Opt_FunctionalDependencies
1404 , Opt_PolymorphicComponents
1405 , Opt_ExistentialQuantification
1408 , Opt_LiberalTypeSynonyms
1410 , Opt_ImpredicativeTypes
1413 , Opt_ParallelListComp
1414 , Opt_EmptyDataDecls
1415 , Opt_KindSignatures
1416 , Opt_PatternSignatures
1417 , Opt_GeneralizedNewtypeDeriving
1418 , Opt_TypeFamilies ]
1421 isFlag :: [(String,a)] -> String -> Bool
1422 isFlag flags f = any (\(ff,_) -> ff == f) flags
1424 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1425 isPrefFlag pref flags no_f
1426 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1430 getFlag :: [(String,a)] -> String -> a
1431 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1433 [] -> panic ("get_flag " ++ f)
1435 getPrefFlag :: String -> [(String,a)] -> String -> a
1436 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1437 -- We should only be passed flags which match the prefix
1439 -- -----------------------------------------------------------------------------
1440 -- Parsing the dynamic flags.
1442 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1443 parseDynamicFlags dflags args = do
1444 let ((leftover,errs),dflags')
1445 = runCmdLine (processArgs dynamic_flags args) dflags
1446 when (not (null errs)) $ do
1447 throwDyn (UsageError (unlines errs))
1448 return (dflags', leftover)
1451 type DynP = CmdLineP DynFlags
1453 upd :: (DynFlags -> DynFlags) -> DynP ()
1455 dfs <- getCmdLineState
1456 putCmdLineState $! (f dfs)
1458 --------------------------
1459 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1460 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1462 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1463 -- When you set f, set the ones it implies
1464 -- When you un-set f, however, we don't un-set the things it implies
1465 -- (except for -fno-glasgow-exts, which is treated specially)
1467 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1469 --------------------------
1470 setDumpFlag :: DynFlag -> OptKind DynP
1471 setDumpFlag dump_flag
1472 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1473 -- Whenver we -ddump, switch off the recompilation checker,
1474 -- else you don't see the dump!
1476 setVerboseCore2Core :: DynP ()
1477 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1478 setDynFlag Opt_D_verbose_core2core
1479 upd (\s -> s { shouldDumpSimplPhase = const True })
1481 setDumpSimplPhases :: String -> DynP ()
1482 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1483 upd (\s -> s { shouldDumpSimplPhase = spec })
1485 spec :: SimplifierMode -> Bool
1487 . map (join (&&) . map match . split ':')
1493 join :: (Bool -> Bool -> Bool)
1494 -> [SimplifierMode -> Bool]
1495 -> SimplifierMode -> Bool
1496 join _ [] = const True
1497 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1499 match :: String -> SimplifierMode -> Bool
1500 match "" = const True
1501 match s = case reads s of
1502 [(n,"")] -> phase_num n
1505 phase_num :: Int -> SimplifierMode -> Bool
1506 phase_num n (SimplPhase k _) = n == k
1507 phase_num _ _ = False
1509 phase_name :: String -> SimplifierMode -> Bool
1510 phase_name s SimplGently = s == "gentle"
1511 phase_name s (SimplPhase _ ss) = s `elem` ss
1513 setVerbosity :: Maybe Int -> DynP ()
1514 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1516 addCmdlineHCInclude :: String -> DynP ()
1517 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1519 extraPkgConf_ :: FilePath -> DynP ()
1520 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1522 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1524 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1526 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1528 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1530 setPackageName :: String -> DynFlags -> DynFlags
1532 | Nothing <- unpackPackageId pid
1533 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1535 = \s -> s{ thisPackage = pid }
1537 pid = stringToPackageId p
1539 -- If we're linking a binary, then only targets that produce object
1540 -- code are allowed (requests for other target types are ignored).
1541 setTarget :: HscTarget -> DynP ()
1542 setTarget l = upd set
1545 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1548 -- Changes the target only if we're compiling object code. This is
1549 -- used by -fasm and -fvia-C, which switch from one to the other, but
1550 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1551 -- can be safely used in an OPTIONS_GHC pragma.
1552 setObjTarget :: HscTarget -> DynP ()
1553 setObjTarget l = upd set
1556 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1559 setOptLevel :: Int -> DynFlags -> DynFlags
1560 setOptLevel n dflags
1561 | hscTarget dflags == HscInterpreted && n > 0
1563 -- not in IO any more, oh well:
1564 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1566 = updOptLevel n dflags
1569 setMainIs :: String -> DynP ()
1571 | not (null main_fn) && isLower (head main_fn)
1572 -- The arg looked like "Foo.Bar.baz"
1573 = upd $ \d -> d{ mainFunIs = Just main_fn,
1574 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1576 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1577 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1579 | otherwise -- The arg looked like "baz"
1580 = upd $ \d -> d{ mainFunIs = Just arg }
1582 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1584 -----------------------------------------------------------------------------
1585 -- Paths & Libraries
1587 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1589 -- -i on its own deletes the import paths
1590 addImportPath "" = upd (\s -> s{importPaths = []})
1591 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1595 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1598 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1600 addFrameworkPath p =
1601 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1603 #ifndef mingw32_TARGET_OS
1604 split_marker :: Char
1605 split_marker = ':' -- not configurable (ToDo)
1608 splitPathList :: String -> [String]
1609 splitPathList s = filter notNull (splitUp s)
1610 -- empty paths are ignored: there might be a trailing
1611 -- ':' in the initial list, for example. Empty paths can
1612 -- cause confusion when they are translated into -I options
1613 -- for passing to gcc.
1615 #ifndef mingw32_TARGET_OS
1616 splitUp xs = split split_marker xs
1618 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1620 -- That is, if "foo:bar:baz" is used, this interpreted as
1621 -- consisting of three entries, 'foo', 'bar', 'baz'.
1622 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1623 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1625 -- Notice that no attempt is made to fully replace the 'standard'
1626 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1627 -- that this will cause too much breakage for users & ':' will
1628 -- work fine even with DOS paths, if you're not insisting on being silly.
1631 splitUp (x:':':div:xs) | div `elem` dir_markers
1632 = ((x:':':div:p): splitUp rs)
1634 (p,rs) = findNextPath xs
1635 -- we used to check for existence of the path here, but that
1636 -- required the IO monad to be threaded through the command-line
1637 -- parser which is quite inconvenient. The
1638 splitUp xs = cons p (splitUp rs)
1640 (p,rs) = findNextPath xs
1645 -- will be called either when we've consumed nought or the
1646 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1647 -- finding the next split marker.
1649 case break (`elem` split_markers) xs of
1650 (p, _:ds) -> (p, ds)
1653 split_markers :: [Char]
1654 split_markers = [':', ';']
1656 dir_markers :: [Char]
1657 dir_markers = ['/', '\\']
1660 -- -----------------------------------------------------------------------------
1661 -- tmpDir, where we store temporary files.
1663 setTmpDir :: FilePath -> DynFlags -> DynFlags
1664 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1665 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1666 -- seem necessary now --SDM 7/2/2008
1668 -----------------------------------------------------------------------------
1671 setOptHpcDir :: String -> DynP ()
1672 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1674 -----------------------------------------------------------------------------
1675 -- Via-C compilation stuff
1677 -- There are some options that we need to pass to gcc when compiling
1678 -- Haskell code via C, but are only supported by recent versions of
1679 -- gcc. The configure script decides which of these options we need,
1680 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1681 -- read before each via-C compilation. The advantage of having these
1682 -- in a separate file is that the file can be created at install-time
1683 -- depending on the available gcc version, and even re-generated later
1684 -- if gcc is upgraded.
1686 -- The options below are not dependent on the version of gcc, only the
1689 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1690 [String]) -- for registerised HC compilations
1691 machdepCCOpts _dflags
1692 #if alpha_TARGET_ARCH
1694 #ifdef HAVE_THREADED_RTS_SUPPORT
1698 -- For now, to suppress the gcc warning "call-clobbered
1699 -- register used for global register variable", we simply
1700 -- disable all warnings altogether using the -w flag. Oh well.
1702 #elif hppa_TARGET_ARCH
1703 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1704 -- (very nice, but too bad the HP /usr/include files don't agree.)
1705 = ( ["-D_HPUX_SOURCE"], [] )
1707 #elif m68k_TARGET_ARCH
1708 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1709 -- popping of args to routines to be explicit; if we let things
1710 -- be deferred 'til after an STGJUMP, imminent death is certain!
1712 -- -fomit-frame-pointer : *don't*
1713 -- It's better to have a6 completely tied up being a frame pointer
1714 -- rather than let GCC pick random things to do with it.
1715 -- (If we want to steal a6, then we would try to do things
1716 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1717 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1719 #elif i386_TARGET_ARCH
1720 -- -fno-defer-pop : basically the same game as for m68k
1722 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1723 -- the fp (%ebp) for our register maps.
1724 = let n_regs = stolen_x86_regs _dflags
1727 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1728 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1731 "-fomit-frame-pointer",
1732 -- we want -fno-builtin, because when gcc inlines
1733 -- built-in functions like memcpy() it tends to
1734 -- run out of registers, requiring -monly-n-regs
1736 "-DSTOLEN_X86_REGS="++show n_regs ]
1739 #elif ia64_TARGET_ARCH
1740 = ( [], ["-fomit-frame-pointer", "-G0"] )
1742 #elif x86_64_TARGET_ARCH
1743 = ( [], ["-fomit-frame-pointer",
1744 "-fno-asynchronous-unwind-tables",
1745 -- the unwind tables are unnecessary for HC code,
1746 -- and get in the way of -split-objs. Another option
1747 -- would be to throw them away in the mangler, but this
1750 -- calling builtins like strlen() using the FFI can
1751 -- cause gcc to run out of regs, so use the external
1755 #elif sparc_TARGET_ARCH
1757 -- For now, to suppress the gcc warning "call-clobbered
1758 -- register used for global register variable", we simply
1759 -- disable all warnings altogether using the -w flag. Oh well.
1761 #elif powerpc_apple_darwin_TARGET
1763 -- Disable Apple's precompiling preprocessor. It's a great thing
1764 -- for "normal" programs, but it doesn't support register variable
1766 = ( [], ["-no-cpp-precomp"] )
1771 picCCOpts :: DynFlags -> [String]
1773 #if darwin_TARGET_OS
1774 -- Apple prefers to do things the other way round.
1775 -- PIC is on by default.
1776 -- -mdynamic-no-pic:
1777 -- Turn off PIC code generation.
1779 -- Don't generate "common" symbols - these are unwanted
1780 -- in dynamic libraries.
1783 = ["-fno-common", "-D__PIC__"]
1785 = ["-mdynamic-no-pic"]
1786 #elif mingw32_TARGET_OS
1787 -- no -fPIC for Windows
1794 = ["-fPIC", "-D__PIC__"]
1799 -- -----------------------------------------------------------------------------
1803 can_split = cSplitObjs == "YES"
1805 -- -----------------------------------------------------------------------------
1808 compilerInfo :: [(String, String)]
1809 compilerInfo = [("Project name", cProjectName),
1810 ("Project version", cProjectVersion),
1811 ("Booter version", cBooterVersion),
1813 ("Interface file version", cHscIfaceFileVersion),
1814 ("Have interpreter", cGhcWithInterpreter),
1815 ("Object splitting", cSplitObjs),
1816 ("Have native code generator", cGhcWithNativeCodeGen),
1817 ("Support SMP", cGhcWithSMP),
1818 ("Unregisterised", cGhcUnregisterised),
1819 ("Tables next to code", cGhcEnableTablesNextToCode),
1820 ("Win32 DLLs", cEnableWin32DLLs),
1821 ("RTS ways", cGhcRTSWays),
1822 ("Leading underscore", cLeadingUnderscore)]