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
240 | Opt_StaticArgumentTransformation
244 | Opt_IgnoreInterfacePragmas
245 | Opt_OmitInterfacePragmas
246 | Opt_DoLambdaEtaExpansion
250 | Opt_UnboxStrictFields
255 | Opt_RegsGraph -- do graph coloring register allocation
256 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
264 | Opt_ExcessPrecision
265 | Opt_ReadUserPackageConf
269 | Opt_HideAllPackages
270 | Opt_PrintBindResult
274 | Opt_BreakOnException
276 | Opt_PrintEvldWithShow
277 | Opt_PrintBindContents
281 | Opt_ConvertToZipCfgAndBack
292 data DynFlags = DynFlags {
295 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
296 stgToDo :: Maybe [StgToDo], -- similarly
297 hscTarget :: HscTarget,
298 hscOutName :: String, -- name of the output file
299 extCoreName :: String, -- name of the .core output file
300 verbosity :: Int, -- verbosity level
301 optLevel :: Int, -- optimisation level
302 simplPhases :: Int, -- number of simplifier phases
303 maxSimplIterations :: Int, -- max simplifier iterations
304 shouldDumpSimplPhase :: SimplifierMode -> Bool,
305 ruleCheck :: Maybe String,
307 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
308 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
309 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
311 stolen_x86_regs :: Int,
312 cmdlineHcIncludes :: [String], -- -#includes
313 importPaths :: [FilePath],
315 mainFunIs :: Maybe String,
316 ctxtStkDepth :: Int, -- Typechecker context stack depth
318 thisPackage :: PackageId,
321 wayNames :: [WayName], -- way flags from the cmd line
322 buildTag :: String, -- the global "way" (eg. "p" for prof)
323 rtsBuildTag :: String, -- the RTS "way"
326 objectDir :: Maybe String,
327 hiDir :: Maybe String,
328 stubDir :: Maybe String,
334 outputFile :: Maybe String,
335 outputHi :: Maybe String,
336 dynLibLoader :: DynLibLoader,
338 -- | This is set by DriverPipeline.runPipeline based on where
339 -- its output is going.
340 dumpPrefix :: Maybe FilePath,
342 -- | Override the dumpPrefix set by runPipeline.
343 -- Set by -ddump-file-prefix
344 dumpPrefixForce :: Maybe FilePath,
346 includePaths :: [String],
347 libraryPaths :: [String],
348 frameworkPaths :: [String], -- used on darwin only
349 cmdlineFrameworks :: [String], -- ditto
350 tmpDir :: String, -- no trailing '/'
352 ghcUsagePath :: FilePath, -- Filled in by SysTools
353 ghciUsagePath :: FilePath, -- ditto
355 hpcDir :: String, -- ^ path to store the .mix files
357 -- options for particular phases
366 opt_windres :: [String],
368 -- commands for particular phases
370 pgm_P :: (String,[Option]),
372 pgm_c :: (String,[Option]),
373 pgm_m :: (String,[Option]),
374 pgm_s :: (String,[Option]),
375 pgm_a :: (String,[Option]),
376 pgm_l :: (String,[Option]),
377 pgm_dll :: (String,[Option]),
379 pgm_sysman :: String,
380 pgm_windres :: String,
383 extraPkgConfs :: [FilePath],
384 topDir :: FilePath, -- filled in by SysTools
385 systemPackageConfig :: FilePath, -- ditto
386 -- The -package-conf flags given on the command line, in the order
389 packageFlags :: [PackageFlag],
390 -- The -package and -hide-package flags from the command-line
393 -- NB. do not modify this field, it is calculated by
394 -- Packages.initPackages and Packages.updatePackages.
395 pkgDatabase :: Maybe (UniqFM PackageConfig),
396 pkgState :: PackageState,
402 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
404 haddockOptions :: Maybe String
415 -- | will this target result in an object file on the disk?
416 isObjectTarget :: HscTarget -> Bool
417 isObjectTarget HscC = True
418 isObjectTarget HscAsm = True
419 isObjectTarget _ = False
421 -- | The 'GhcMode' tells us whether we're doing multi-module
422 -- compilation (controlled via the "GHC" API) or one-shot
423 -- (single-module) compilation. This makes a difference primarily to
424 -- the "Finder": in one-shot mode we look for interface files for
425 -- imported modules, but in multi-module mode we look for source files
426 -- in order to check whether they need to be recompiled.
428 = CompManager -- ^ --make, GHCi, etc.
429 | OneShot -- ^ ghc -c Foo.hs
430 | MkDepend -- ^ ghc -M, see Finder for why we need this
433 isOneShot :: GhcMode -> Bool
434 isOneShot OneShot = True
435 isOneShot _other = False
437 -- | What kind of linking to do.
438 data GhcLink -- What to do in the link step, if there is one
439 = NoLink -- Don't link at all
440 | LinkBinary -- Link object code into a binary
441 | LinkInMemory -- Use the in-memory dynamic linker
442 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
445 isNoLink :: GhcLink -> Bool
446 isNoLink NoLink = True
450 = ExposePackage String
452 | IgnorePackage String
455 defaultHscTarget :: HscTarget
456 defaultHscTarget = defaultObjectTarget
458 -- | the 'HscTarget' value corresponding to the default way to create
459 -- object files on the current platform.
460 defaultObjectTarget :: HscTarget
462 | cGhcWithNativeCodeGen == "YES" = HscAsm
467 | Wrapped (Maybe String)
471 initDynFlags :: DynFlags -> IO DynFlags
472 initDynFlags dflags = do
473 -- someday these will be dynamic flags
474 ways <- readIORef v_Ways
475 build_tag <- readIORef v_Build_tag
476 rts_build_tag <- readIORef v_RTS_Build_tag
479 buildTag = build_tag,
480 rtsBuildTag = rts_build_tag
483 defaultDynFlags :: DynFlags
486 ghcMode = CompManager,
487 ghcLink = LinkBinary,
490 hscTarget = defaultHscTarget,
496 maxSimplIterations = 4,
497 shouldDumpSimplPhase = const False,
499 specConstrThreshold = Just 200,
500 specConstrCount = Just 3,
501 liberateCaseThreshold = Just 200,
503 cmdlineHcIncludes = [],
507 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
509 thisPackage = mainPackageId,
515 objectSuf = phaseInputExt StopLn,
516 hcSuf = phaseInputExt HCc,
519 outputFile = Nothing,
521 dynLibLoader = Deployable,
522 dumpPrefix = Nothing,
523 dumpPrefixForce = Nothing,
527 cmdlineFrameworks = [],
528 tmpDir = cDEFAULT_TMPDIR,
546 pkgDatabase = Nothing,
547 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
548 haddockOptions = Nothing,
550 Opt_ReadUserPackageConf,
552 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
553 -- behaviour the default, to see if anyone notices
557 Opt_MonomorphismRestriction,
565 Opt_PrintBindContents
567 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
568 -- The default -O0 options
571 log_action = \severity srcSpan style msg ->
573 SevInfo -> hPutStrLn stderr (show (msg style))
574 SevFatal -> hPutStrLn stderr (show (msg style))
575 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
581 0 | print errors & warnings only
582 1 | minimal verbosity: print "compiling M ... done." for each module.
583 2 | equivalent to -dshow-passes
584 3 | equivalent to existing "ghc -v"
585 4 | "ghc -v -ddump-most"
586 5 | "ghc -v -ddump-all"
589 dopt :: DynFlag -> DynFlags -> Bool
590 dopt f dflags = f `elem` (flags dflags)
592 dopt_set :: DynFlags -> DynFlag -> DynFlags
593 dopt_set dfs f = dfs{ flags = f : flags dfs }
595 dopt_unset :: DynFlags -> DynFlag -> DynFlags
596 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
598 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
599 getOpts dflags opts = reverse (opts dflags)
600 -- We add to the options from the front, so we need to reverse the list
602 getVerbFlag :: DynFlags -> String
604 | verbosity dflags >= 3 = "-v"
607 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
608 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
609 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
610 addCmdlineFramework, addHaddockOpts
611 :: String -> DynFlags -> DynFlags
612 setOutputFile, setOutputHi, setDumpPrefixForce
613 :: Maybe String -> DynFlags -> DynFlags
615 setObjectDir f d = d{ objectDir = Just f}
616 setHiDir f d = d{ hiDir = Just f}
617 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
618 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
619 -- #included from the .hc file when compiling with -fvia-C.
621 setObjectSuf f d = d{ objectSuf = f}
622 setHiSuf f d = d{ hiSuf = f}
623 setHcSuf f d = d{ hcSuf = f}
625 setOutputFile f d = d{ outputFile = f}
626 setOutputHi f d = d{ outputHi = f}
628 parseDynLibLoaderMode f d =
630 ("deploy", "") -> d{ dynLibLoader = Deployable }
631 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
632 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
633 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
634 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
635 (_,_) -> error "Unknown dynlib loader"
637 setDumpPrefixForce f d = d { dumpPrefixForce = f}
639 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
640 -- Config.hs should really use Option.
641 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
643 setPgmL f d = d{ pgm_L = f}
644 setPgmF f d = d{ pgm_F = f}
645 setPgmc f d = d{ pgm_c = (f,[])}
646 setPgmm f d = d{ pgm_m = (f,[])}
647 setPgms f d = d{ pgm_s = (f,[])}
648 setPgma f d = d{ pgm_a = (f,[])}
649 setPgml f d = d{ pgm_l = (f,[])}
650 setPgmdll f d = d{ pgm_dll = (f,[])}
651 setPgmwindres f d = d{ pgm_windres = f}
653 addOptL f d = d{ opt_L = f : opt_L d}
654 addOptP f d = d{ opt_P = f : opt_P d}
655 addOptF f d = d{ opt_F = f : opt_F d}
656 addOptc f d = d{ opt_c = f : opt_c d}
657 addOptm f d = d{ opt_m = f : opt_m d}
658 addOpta f d = d{ opt_a = f : opt_a d}
659 addOptl f d = d{ opt_l = f : opt_l d}
660 addOptdep f d = d{ opt_dep = f : opt_dep d}
661 addOptwindres f d = d{ opt_windres = f : opt_windres d}
663 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
665 addHaddockOpts f d = d{ haddockOptions = Just f}
667 -- -----------------------------------------------------------------------------
668 -- Command-line options
670 -- When invoking external tools as part of the compilation pipeline, we
671 -- pass these a sequence of options on the command-line. Rather than
672 -- just using a list of Strings, we use a type that allows us to distinguish
673 -- between filepaths and 'other stuff'. [The reason being, of course, that
674 -- this type gives us a handle on transforming filenames, and filenames only,
675 -- to whatever format they're expected to be on a particular platform.]
678 = FileOption -- an entry that _contains_ filename(s) / filepaths.
679 String -- a non-filepath prefix that shouldn't be
680 -- transformed (e.g., "/out=")
681 String -- the filepath/filename portion
684 -----------------------------------------------------------------------------
685 -- Setting the optimisation level
687 updOptLevel :: Int -> DynFlags -> DynFlags
688 -- Set dynflags appropriate to the optimisation level
690 = dfs2{ optLevel = final_n }
692 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
693 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
694 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
696 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
697 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
699 optLevelFlags :: [([Int], DynFlag)]
701 = [ ([0], Opt_IgnoreInterfacePragmas)
702 , ([0], Opt_OmitInterfacePragmas)
704 , ([1,2], Opt_IgnoreAsserts)
705 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
707 , ([1,2], Opt_DoEtaReduction)
708 , ([1,2], Opt_CaseMerge)
709 , ([1,2], Opt_Strictness)
711 , ([1,2], Opt_FullLaziness)
713 , ([2], Opt_LiberateCase)
714 , ([2], Opt_SpecConstr)
715 , ([2], Opt_StaticArgumentTransformation)
717 , ([0,1,2], Opt_DoLambdaEtaExpansion)
718 -- This one is important for a tiresome reason:
719 -- we want to make sure that the bindings for data
720 -- constructors are eta-expanded. This is probably
721 -- a good thing anyway, but it seems fragile.
724 -- -----------------------------------------------------------------------------
725 -- Standard sets of warning options
727 standardWarnings :: [DynFlag]
729 = [ Opt_WarnDeprecations,
730 Opt_WarnOverlappingPatterns,
731 Opt_WarnMissingFields,
732 Opt_WarnMissingMethods,
733 Opt_WarnDuplicateExports
736 minusWOpts :: [DynFlag]
738 = standardWarnings ++
739 [ Opt_WarnUnusedBinds,
740 Opt_WarnUnusedMatches,
741 Opt_WarnUnusedImports,
742 Opt_WarnIncompletePatterns,
746 minusWallOpts :: [DynFlag]
749 [ Opt_WarnTypeDefaults,
750 Opt_WarnNameShadowing,
756 -- minuswRemovesOpts should be every warning option
757 minuswRemovesOpts :: [DynFlag]
760 [Opt_WarnImplicitPrelude,
761 Opt_WarnIncompletePatternsRecUpd,
762 Opt_WarnSimplePatterns,
763 Opt_WarnMonomorphism,
767 -- -----------------------------------------------------------------------------
768 -- CoreToDo: abstraction of core-to-core passes to run.
770 data CoreToDo -- These are diff core-to-core passes,
771 -- which may be invoked in any order,
772 -- as many times as you like.
774 = CoreDoSimplify -- The core-to-core simplifier.
777 -- Each run of the simplifier can take a different
778 -- set of simplifier-specific flags.
780 | CoreDoFloatOutwards FloatOutSwitches
785 | CoreDoWorkerWrapper
788 | CoreDoOldStrictness
791 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
792 -- matching this string
793 | CoreDoVectorisation
794 | CoreDoNothing -- Useful when building up
795 | CoreDoPasses [CoreToDo] -- lists of these things
797 data SimplifierMode -- See comments in SimplMonad
799 | SimplPhase Int [String]
801 data SimplifierSwitch
802 = MaxSimplifierIterations Int
805 data FloatOutSwitches
806 = FloatOutSw Bool -- True <=> float lambdas to top level
807 Bool -- True <=> float constants to top level,
808 -- even if they do not escape a lambda
811 -- The core-to-core pass ordering is derived from the DynFlags:
812 runWhen :: Bool -> CoreToDo -> CoreToDo
813 runWhen True do_this = do_this
814 runWhen False _ = CoreDoNothing
816 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
817 runMaybe (Just x) f = f x
818 runMaybe Nothing _ = CoreDoNothing
820 getCoreToDo :: DynFlags -> [CoreToDo]
822 | Just todo <- coreToDo dflags = todo -- set explicitly by user
823 | otherwise = core_todo
825 opt_level = optLevel dflags
826 phases = simplPhases dflags
827 max_iter = maxSimplIterations dflags
828 strictness = dopt Opt_Strictness dflags
829 full_laziness = dopt Opt_FullLaziness dflags
830 cse = dopt Opt_CSE dflags
831 spec_constr = dopt Opt_SpecConstr dflags
832 liberate_case = dopt Opt_LiberateCase dflags
833 rule_check = ruleCheck dflags
834 vectorisation = dopt Opt_Vectorise dflags
835 -- static_args = dopt Opt_StaticArgumentTransformation dflags
837 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
839 simpl_phase phase names iter
841 [ CoreDoSimplify (SimplPhase phase names) [
842 MaxSimplifierIterations iter
844 maybe_rule_check phase
847 -- By default, we have 2 phases before phase 0.
849 -- Want to run with inline phase 2 after the specialiser to give
850 -- maximum chance for fusion to work before we inline build/augment
851 -- in phase 1. This made a difference in 'ansi' where an
852 -- overloaded function wasn't inlined till too late.
854 -- Need phase 1 so that build/augment get
855 -- inlined. I found that spectral/hartel/genfft lost some useful
856 -- strictness in the function sumcode' if augment is not inlined
857 -- before strictness analysis runs
858 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
859 | phase <- [phases, phases-1 .. 1] ]
862 -- initial simplify: mk specialiser happy: minimum effort please
863 simpl_gently = CoreDoSimplify SimplGently [
865 -- Don't inline anything till full laziness has bitten
866 -- In particular, inlining wrappers inhibits floating
867 -- e.g. ...(case f x of ...)...
868 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
869 -- ==> ...(case x of I# x# -> case fw x# of ...)...
870 -- and now the redex (f x) isn't floatable any more
871 -- Similarly, don't apply any rules until after full
872 -- laziness. Notably, list fusion can prevent floating.
874 NoCaseOfCase, -- Don't do case-of-case transformations.
875 -- This makes full laziness work better
876 MaxSimplifierIterations max_iter
880 if opt_level == 0 then
881 [runWhen vectorisation (CoreDoPasses [ simpl_gently, CoreDoVectorisation ]),
882 simpl_phase 0 ["final"] max_iter]
883 else {- opt_level >= 1 -} [
885 -- We want to do the static argument transform before full laziness as it
886 -- may expose extra opportunities to float things outwards. However, to fix
887 -- up the output of the transformation we need at do at least one simplify
888 -- after this before anything else
889 -- runWhen static_args CoreDoStaticArgs,
890 -- XXX disabled, see #2321
892 -- initial simplify: mk specialiser happy: minimum effort please
895 -- We run vectorisation here for now, but we might also try to run
897 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
899 -- Specialisation is best done before full laziness
900 -- so that overloaded functions have all their dictionary lambdas manifest
903 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
909 -- Phase 0: allow all Ids to be inlined now
910 -- This gets foldr inlined before strictness analysis
912 -- At least 3 iterations because otherwise we land up with
913 -- huge dead expressions because of an infelicity in the
915 -- let k = BIG in foldr k z xs
916 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
917 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
919 simpl_phase 0 ["main"] (max max_iter 3),
922 #ifdef OLD_STRICTNESS
925 runWhen strictness (CoreDoPasses [
929 simpl_phase 0 ["post-worker-wrapper"] max_iter
932 runWhen full_laziness
933 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
934 True)), -- Float constants
935 -- nofib/spectral/hartel/wang doubles in speed if you
936 -- do full laziness late in the day. It only happens
937 -- after fusion and other stuff, so the early pass doesn't
938 -- catch it. For the record, the redex is
939 -- f_el22 (f_el21 r_midblock)
943 -- We want CSE to follow the final full-laziness pass, because it may
944 -- succeed in commoning up things floated out by full laziness.
945 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
951 -- Case-liberation for -O2. This should be after
952 -- strictness analysis and the simplification which follows it.
953 runWhen liberate_case (CoreDoPasses [
955 simpl_phase 0 ["post-liberate-case"] max_iter
956 ]), -- Run the simplifier after LiberateCase to vastly
957 -- reduce the possiblility of shadowing
958 -- Reason: see Note [Shadowing] in SpecConstr.lhs
960 runWhen spec_constr CoreDoSpecConstr,
964 -- Final clean-up simplification:
965 simpl_phase 0 ["final"] max_iter
968 -- -----------------------------------------------------------------------------
969 -- StgToDo: abstraction of stg-to-stg passes to run.
972 = StgDoMassageForProfiling -- should be (next to) last
973 -- There's also setStgVarInfo, but its absolute "lastness"
974 -- is so critical that it is hardwired in (no flag).
977 getStgToDo :: DynFlags -> [StgToDo]
979 | Just todo <- stgToDo dflags = todo -- set explicitly by user
982 stg_stats = dopt Opt_StgStats dflags
984 todo1 = if stg_stats then [D_stg_stats] else []
986 todo2 | WayProf `elem` wayNames dflags
987 = StgDoMassageForProfiling : todo1
991 -- -----------------------------------------------------------------------------
995 allFlags = map ('-':) $
996 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
997 map ("fno-"++) flags ++
1001 where ok (PrefixPred _ _) = False
1003 flags = map fst fFlags
1006 dynamic_flags :: [(String, OptKind DynP)]
1008 ( "n" , NoArg (setDynFlag Opt_DryRun) )
1009 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
1010 , ( "F" , NoArg (setDynFlag Opt_Pp))
1011 , ( "#include" , HasArg (addCmdlineHCInclude) )
1012 , ( "v" , OptIntSuffix setVerbosity )
1014 ------- Specific phases --------------------------------------------
1015 , ( "pgmL" , HasArg (upd . setPgmL) )
1016 , ( "pgmP" , HasArg (upd . setPgmP) )
1017 , ( "pgmF" , HasArg (upd . setPgmF) )
1018 , ( "pgmc" , HasArg (upd . setPgmc) )
1019 , ( "pgmm" , HasArg (upd . setPgmm) )
1020 , ( "pgms" , HasArg (upd . setPgms) )
1021 , ( "pgma" , HasArg (upd . setPgma) )
1022 , ( "pgml" , HasArg (upd . setPgml) )
1023 , ( "pgmdll" , HasArg (upd . setPgmdll) )
1024 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
1026 , ( "optL" , HasArg (upd . addOptL) )
1027 , ( "optP" , HasArg (upd . addOptP) )
1028 , ( "optF" , HasArg (upd . addOptF) )
1029 , ( "optc" , HasArg (upd . addOptc) )
1030 , ( "optm" , HasArg (upd . addOptm) )
1031 , ( "opta" , HasArg (upd . addOpta) )
1032 , ( "optl" , HasArg (upd . addOptl) )
1033 , ( "optdep" , HasArg (upd . addOptdep) )
1034 , ( "optwindres" , HasArg (upd . addOptwindres) )
1036 , ( "split-objs" , NoArg (if can_split
1037 then setDynFlag Opt_SplitObjs
1040 -------- Linking ----------------------------------------------------
1041 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1042 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1043 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1044 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1046 ------- Libraries ---------------------------------------------------
1047 , ( "L" , Prefix addLibraryPath )
1048 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1050 ------- Frameworks --------------------------------------------------
1051 -- -framework-path should really be -F ...
1052 , ( "framework-path" , HasArg addFrameworkPath )
1053 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1055 ------- Output Redirection ------------------------------------------
1056 , ( "odir" , HasArg (upd . setObjectDir))
1057 , ( "o" , SepArg (upd . setOutputFile . Just))
1058 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1059 , ( "osuf" , HasArg (upd . setObjectSuf))
1060 , ( "hcsuf" , HasArg (upd . setHcSuf))
1061 , ( "hisuf" , HasArg (upd . setHiSuf))
1062 , ( "hidir" , HasArg (upd . setHiDir))
1063 , ( "tmpdir" , HasArg (upd . setTmpDir))
1064 , ( "stubdir" , HasArg (upd . setStubDir))
1065 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1067 ------- Keeping temporary files -------------------------------------
1068 -- These can be singular (think ghc -c) or plural (think ghc --make)
1069 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1070 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1071 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1072 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1073 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1074 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1075 -- This only makes sense as plural
1076 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1078 ------- Miscellaneous ----------------------------------------------
1079 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1080 , ( "main-is" , SepArg setMainIs )
1081 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1082 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1083 , ( "hpcdir" , SepArg setOptHpcDir )
1085 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1086 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1087 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1089 ------- Packages ----------------------------------------------------
1090 , ( "package-conf" , HasArg extraPkgConf_ )
1091 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1092 , ( "package-name" , HasArg (upd . setPackageName) )
1093 , ( "package" , HasArg exposePackage )
1094 , ( "hide-package" , HasArg hidePackage )
1095 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1096 , ( "ignore-package" , HasArg ignorePackage )
1097 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1099 ------ HsCpp opts ---------------------------------------------------
1100 , ( "D", AnySuffix (upd . addOptP) )
1101 , ( "U", AnySuffix (upd . addOptP) )
1103 ------- Include/Import Paths ----------------------------------------
1104 , ( "I" , Prefix addIncludePath)
1105 , ( "i" , OptPrefix addImportPath )
1107 ------ Debugging ----------------------------------------------------
1108 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1110 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1111 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1112 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1113 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1114 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1115 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1116 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1117 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1118 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1119 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1120 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1121 , ( "ddump-asm-regalloc-stages",
1122 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1123 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1124 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1125 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1126 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1127 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1128 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1129 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1130 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1131 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1132 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1133 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1134 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1135 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1136 , ( "ddump-simpl-phases", OptPrefix setDumpSimplPhases)
1137 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1138 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1139 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1140 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1141 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1142 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1143 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1144 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1145 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1146 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1147 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1148 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1149 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1150 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1151 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1152 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1153 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1154 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1155 , ( "dverbose-core2core", NoArg setVerboseCore2Core)
1156 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1157 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1158 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1159 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1160 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1161 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1162 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1163 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1164 , ( "ddump-hi-diffs", setDumpFlag Opt_D_dump_hi_diffs)
1166 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1167 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1168 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1169 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1170 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1171 setVerbosity (Just 2)) )
1172 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1174 ------ Machine dependant (-m<blah>) stuff ---------------------------
1176 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1177 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1178 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1180 ------ Warning opts -------------------------------------------------
1181 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1182 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1183 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1184 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1185 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1186 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1188 ------ Optimisation flags ------------------------------------------
1189 , ( "O" , NoArg (upd (setOptLevel 1)))
1190 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1191 , ( "Odph" , NoArg (upd setDPHOpt))
1192 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1193 -- If the number is missing, use 1
1195 , ( "fsimplifier-phases", IntSuffix (\n ->
1196 upd (\dfs -> dfs{ simplPhases = n })) )
1197 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1198 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1200 , ( "fspec-constr-threshold", IntSuffix (\n ->
1201 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1202 , ( "fno-spec-constr-threshold", NoArg (
1203 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1204 , ( "fspec-constr-count", IntSuffix (\n ->
1205 upd (\dfs -> dfs{ specConstrCount = Just n })))
1206 , ( "fno-spec-constr-count", NoArg (
1207 upd (\dfs -> dfs{ specConstrCount = Nothing })))
1208 , ( "fliberate-case-threshold", IntSuffix (\n ->
1209 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1210 , ( "fno-liberate-case-threshold", NoArg (
1211 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1213 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1214 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1216 ------ Compiler flags -----------------------------------------------
1218 , ( "fasm", NoArg (setObjTarget HscAsm) )
1219 , ( "fvia-c", NoArg (setObjTarget HscC) )
1220 , ( "fvia-C", NoArg (setObjTarget HscC) )
1222 , ( "fno-code", NoArg (setTarget HscNothing))
1223 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1224 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1226 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1227 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1229 -- the rest of the -f* and -fno-* flags
1230 , ( "f", PrefixPred (isFlag fFlags)
1231 (\f -> setDynFlag (getFlag fFlags f)) )
1232 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1233 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1235 -- the -X* and -XNo* flags
1236 , ( "X", PrefixPred (isFlag xFlags)
1237 (\f -> setDynFlag (getFlag xFlags f)) )
1238 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1239 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1242 -- these -f<blah> flags can all be reversed with -fno-<blah>
1244 fFlags :: [(String, DynFlag)]
1246 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1247 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1248 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1249 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1250 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1251 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1252 ( "warn-missing-fields", Opt_WarnMissingFields ),
1253 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1254 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1255 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1256 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1257 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1258 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1259 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1260 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1261 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1262 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1263 ( "warn-deprecations", Opt_WarnDeprecations ),
1264 ( "warn-orphans", Opt_WarnOrphans ),
1265 ( "warn-tabs", Opt_WarnTabs ),
1266 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1267 ( "strictness", Opt_Strictness ),
1268 ( "static-argument-transformation", Opt_StaticArgumentTransformation ),
1269 ( "full-laziness", Opt_FullLaziness ),
1270 ( "liberate-case", Opt_LiberateCase ),
1271 ( "spec-constr", Opt_SpecConstr ),
1273 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1274 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1275 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1276 ( "ignore-asserts", Opt_IgnoreAsserts ),
1277 ( "do-eta-reduction", Opt_DoEtaReduction ),
1278 ( "case-merge", Opt_CaseMerge ),
1279 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1280 ( "method-sharing", Opt_MethodSharing ),
1281 ( "dicts-cheap", Opt_DictsCheap ),
1282 ( "excess-precision", Opt_ExcessPrecision ),
1283 ( "asm-mangling", Opt_DoAsmMangling ),
1284 ( "print-bind-result", Opt_PrintBindResult ),
1285 ( "force-recomp", Opt_ForceRecomp ),
1286 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1287 ( "rewrite-rules", Opt_RewriteRules ),
1288 ( "break-on-exception", Opt_BreakOnException ),
1289 ( "break-on-error", Opt_BreakOnError ),
1290 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1291 ( "print-bind-contents", Opt_PrintBindContents ),
1292 ( "run-cps", Opt_RunCPSZ ),
1293 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1294 ( "vectorise", Opt_Vectorise ),
1295 ( "regs-graph", Opt_RegsGraph),
1296 ( "regs-iterative", Opt_RegsIterative),
1297 -- Deprecated in favour of -XTemplateHaskell:
1298 ( "th", Opt_TemplateHaskell ),
1299 -- Deprecated in favour of -XForeignFunctionInterface:
1300 ( "fi", Opt_ForeignFunctionInterface ),
1301 -- Deprecated in favour of -XForeignFunctionInterface:
1302 ( "ffi", Opt_ForeignFunctionInterface ),
1303 -- Deprecated in favour of -XArrows:
1304 ( "arrows", Opt_Arrows ),
1305 -- Deprecated in favour of -XGenerics:
1306 ( "generics", Opt_Generics ),
1307 -- Deprecated in favour of -XImplicitPrelude:
1308 ( "implicit-prelude", Opt_ImplicitPrelude ),
1309 -- Deprecated in favour of -XBangPatterns:
1310 ( "bang-patterns", Opt_BangPatterns ),
1311 -- Deprecated in favour of -XMonomorphismRestriction:
1312 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1313 -- Deprecated in favour of -XMonoPatBinds:
1314 ( "mono-pat-binds", Opt_MonoPatBinds ),
1315 -- Deprecated in favour of -XExtendedDefaultRules:
1316 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1317 -- Deprecated in favour of -XImplicitParams:
1318 ( "implicit-params", Opt_ImplicitParams ),
1319 -- Deprecated in favour of -XScopedTypeVariables:
1320 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1321 -- Deprecated in favour of -XPArr:
1322 ( "parr", Opt_PArr ),
1323 -- Deprecated in favour of -XOverlappingInstances:
1324 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1325 -- Deprecated in favour of -XUndecidableInstances:
1326 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1327 -- Deprecated in favour of -XIncoherentInstances:
1328 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1329 ( "gen-manifest", Opt_GenManifest ),
1330 ( "embed-manifest", Opt_EmbedManifest )
1333 supportedLanguages :: [String]
1334 supportedLanguages = map fst xFlags
1336 -- These -X<blah> flags can all be reversed with -XNo<blah>
1337 xFlags :: [(String, DynFlag)]
1340 ( "PatternGuards", Opt_PatternGuards ),
1341 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1342 ( "MagicHash", Opt_MagicHash ),
1343 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1344 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1345 ( "KindSignatures", Opt_KindSignatures ),
1346 ( "PatternSignatures", Opt_PatternSignatures ),
1347 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1348 ( "ParallelListComp", Opt_ParallelListComp ),
1349 ( "TransformListComp", Opt_TransformListComp ),
1350 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1351 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1352 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1353 ( "Rank2Types", Opt_Rank2Types ),
1354 ( "RankNTypes", Opt_RankNTypes ),
1355 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1356 ( "TypeOperators", Opt_TypeOperators ),
1357 ( "RecursiveDo", Opt_RecursiveDo ),
1358 ( "Arrows", Opt_Arrows ),
1359 ( "PArr", Opt_PArr ),
1360 ( "TemplateHaskell", Opt_TemplateHaskell ),
1361 ( "QuasiQuotes", Opt_QuasiQuotes ),
1362 ( "Generics", Opt_Generics ),
1364 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1365 ( "RecordWildCards", Opt_RecordWildCards ),
1366 ( "RecordPuns", Opt_RecordPuns ),
1367 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1368 ( "OverloadedStrings", Opt_OverloadedStrings ),
1369 ( "GADTs", Opt_GADTs ),
1370 ( "ViewPatterns", Opt_ViewPatterns),
1371 ( "TypeFamilies", Opt_TypeFamilies ),
1372 ( "BangPatterns", Opt_BangPatterns ),
1374 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1375 -- On by default (which is not strictly H98):
1376 ( "MonoPatBinds", Opt_MonoPatBinds ),
1377 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1378 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1379 ( "ImplicitParams", Opt_ImplicitParams ),
1380 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1381 ( "UnboxedTuples", Opt_UnboxedTuples ),
1382 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1383 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1384 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1385 ( "FlexibleContexts", Opt_FlexibleContexts ),
1386 ( "FlexibleInstances", Opt_FlexibleInstances ),
1387 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1388 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1389 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1390 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1391 ( "OverlappingInstances", Opt_OverlappingInstances ),
1392 ( "UndecidableInstances", Opt_UndecidableInstances ),
1393 ( "IncoherentInstances", Opt_IncoherentInstances )
1396 impliedFlags :: [(DynFlag, [DynFlag])]
1398 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1399 -- be completely rigid for GADTs
1400 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1401 -- Note [Scoped tyvars] in TcBinds
1404 glasgowExtsFlags :: [DynFlag]
1405 glasgowExtsFlags = [
1406 Opt_PrintExplicitForalls
1407 , Opt_ForeignFunctionInterface
1408 , Opt_UnliftedFFITypes
1410 , Opt_ImplicitParams
1411 , Opt_ScopedTypeVariables
1413 , Opt_TypeSynonymInstances
1414 , Opt_StandaloneDeriving
1415 , Opt_DeriveDataTypeable
1416 , Opt_FlexibleContexts
1417 , Opt_FlexibleInstances
1418 , Opt_ConstrainedClassMethods
1419 , Opt_MultiParamTypeClasses
1420 , Opt_FunctionalDependencies
1422 , Opt_PolymorphicComponents
1423 , Opt_ExistentialQuantification
1426 , Opt_LiberalTypeSynonyms
1428 , Opt_ImpredicativeTypes
1431 , Opt_ParallelListComp
1432 , Opt_EmptyDataDecls
1433 , Opt_KindSignatures
1434 , Opt_PatternSignatures
1435 , Opt_GeneralizedNewtypeDeriving
1436 , Opt_TypeFamilies ]
1439 isFlag :: [(String,a)] -> String -> Bool
1440 isFlag flags f = any (\(ff,_) -> ff == f) flags
1442 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1443 isPrefFlag pref flags no_f
1444 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1448 getFlag :: [(String,a)] -> String -> a
1449 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1451 [] -> panic ("get_flag " ++ f)
1453 getPrefFlag :: String -> [(String,a)] -> String -> a
1454 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1455 -- We should only be passed flags which match the prefix
1457 -- -----------------------------------------------------------------------------
1458 -- Parsing the dynamic flags.
1460 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1461 parseDynamicFlags dflags args = do
1462 let ((leftover,errs),dflags')
1463 = runCmdLine (processArgs dynamic_flags args) dflags
1464 when (not (null errs)) $ do
1465 throwDyn (UsageError (unlines errs))
1466 return (dflags', leftover)
1469 type DynP = CmdLineP DynFlags
1471 upd :: (DynFlags -> DynFlags) -> DynP ()
1473 dfs <- getCmdLineState
1474 putCmdLineState $! (f dfs)
1476 --------------------------
1477 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1478 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1480 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1481 -- When you set f, set the ones it implies
1482 -- When you un-set f, however, we don't un-set the things it implies
1483 -- (except for -fno-glasgow-exts, which is treated specially)
1485 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1487 --------------------------
1488 setDumpFlag :: DynFlag -> OptKind DynP
1489 setDumpFlag dump_flag
1490 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1491 | otherwise = NoArg (setDynFlag dump_flag)
1493 -- Whenver we -ddump, switch off the recompilation checker,
1494 -- else you don't see the dump!
1495 -- However, certain dumpy-things are really interested in what's going
1496 -- on during recompilation checking, so in those cases we
1497 -- don't want to turn it off.
1498 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1499 Opt_D_dump_hi_diffs]
1501 setVerboseCore2Core :: DynP ()
1502 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1503 setDynFlag Opt_D_verbose_core2core
1504 upd (\s -> s { shouldDumpSimplPhase = const True })
1506 setDumpSimplPhases :: String -> DynP ()
1507 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1508 upd (\s -> s { shouldDumpSimplPhase = spec })
1510 spec :: SimplifierMode -> Bool
1512 . map (join (&&) . map match . split ':')
1518 join :: (Bool -> Bool -> Bool)
1519 -> [SimplifierMode -> Bool]
1520 -> SimplifierMode -> Bool
1521 join _ [] = const True
1522 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1524 match :: String -> SimplifierMode -> Bool
1525 match "" = const True
1526 match s = case reads s of
1527 [(n,"")] -> phase_num n
1530 phase_num :: Int -> SimplifierMode -> Bool
1531 phase_num n (SimplPhase k _) = n == k
1532 phase_num _ _ = False
1534 phase_name :: String -> SimplifierMode -> Bool
1535 phase_name s SimplGently = s == "gentle"
1536 phase_name s (SimplPhase _ ss) = s `elem` ss
1538 setVerbosity :: Maybe Int -> DynP ()
1539 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1541 addCmdlineHCInclude :: String -> DynP ()
1542 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1544 extraPkgConf_ :: FilePath -> DynP ()
1545 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1547 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1549 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1551 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1553 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1555 setPackageName :: String -> DynFlags -> DynFlags
1557 | Nothing <- unpackPackageId pid
1558 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1560 = \s -> s{ thisPackage = pid }
1562 pid = stringToPackageId p
1564 -- If we're linking a binary, then only targets that produce object
1565 -- code are allowed (requests for other target types are ignored).
1566 setTarget :: HscTarget -> DynP ()
1567 setTarget l = upd set
1570 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1573 -- Changes the target only if we're compiling object code. This is
1574 -- used by -fasm and -fvia-C, which switch from one to the other, but
1575 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1576 -- can be safely used in an OPTIONS_GHC pragma.
1577 setObjTarget :: HscTarget -> DynP ()
1578 setObjTarget l = upd set
1581 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1584 setOptLevel :: Int -> DynFlags -> DynFlags
1585 setOptLevel n dflags
1586 | hscTarget dflags == HscInterpreted && n > 0
1588 -- not in IO any more, oh well:
1589 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1591 = updOptLevel n dflags
1594 -- -Odph is equivalent to
1596 -- -O2 optimise as much as possible
1597 -- -fno-method-sharing sharing specialisation defeats fusion
1599 -- -fdicts-cheap always inline dictionaries
1600 -- -fmax-simplifier-iterations20 this is necessary sometimes
1601 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1603 setDPHOpt :: DynFlags -> DynFlags
1604 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1605 , specConstrThreshold = Nothing
1607 `dopt_set` Opt_DictsCheap
1608 `dopt_unset` Opt_MethodSharing
1612 setMainIs :: String -> DynP ()
1614 | not (null main_fn) && isLower (head main_fn)
1615 -- The arg looked like "Foo.Bar.baz"
1616 = upd $ \d -> d{ mainFunIs = Just main_fn,
1617 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1619 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1620 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1622 | otherwise -- The arg looked like "baz"
1623 = upd $ \d -> d{ mainFunIs = Just arg }
1625 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1627 -----------------------------------------------------------------------------
1628 -- Paths & Libraries
1630 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1632 -- -i on its own deletes the import paths
1633 addImportPath "" = upd (\s -> s{importPaths = []})
1634 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1638 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1641 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1643 addFrameworkPath p =
1644 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1646 #ifndef mingw32_TARGET_OS
1647 split_marker :: Char
1648 split_marker = ':' -- not configurable (ToDo)
1651 splitPathList :: String -> [String]
1652 splitPathList s = filter notNull (splitUp s)
1653 -- empty paths are ignored: there might be a trailing
1654 -- ':' in the initial list, for example. Empty paths can
1655 -- cause confusion when they are translated into -I options
1656 -- for passing to gcc.
1658 #ifndef mingw32_TARGET_OS
1659 splitUp xs = split split_marker xs
1661 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1663 -- That is, if "foo:bar:baz" is used, this interpreted as
1664 -- consisting of three entries, 'foo', 'bar', 'baz'.
1665 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1666 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1668 -- Notice that no attempt is made to fully replace the 'standard'
1669 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1670 -- that this will cause too much breakage for users & ':' will
1671 -- work fine even with DOS paths, if you're not insisting on being silly.
1674 splitUp (x:':':div:xs) | div `elem` dir_markers
1675 = ((x:':':div:p): splitUp rs)
1677 (p,rs) = findNextPath xs
1678 -- we used to check for existence of the path here, but that
1679 -- required the IO monad to be threaded through the command-line
1680 -- parser which is quite inconvenient. The
1681 splitUp xs = cons p (splitUp rs)
1683 (p,rs) = findNextPath xs
1688 -- will be called either when we've consumed nought or the
1689 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1690 -- finding the next split marker.
1692 case break (`elem` split_markers) xs of
1693 (p, _:ds) -> (p, ds)
1696 split_markers :: [Char]
1697 split_markers = [':', ';']
1699 dir_markers :: [Char]
1700 dir_markers = ['/', '\\']
1703 -- -----------------------------------------------------------------------------
1704 -- tmpDir, where we store temporary files.
1706 setTmpDir :: FilePath -> DynFlags -> DynFlags
1707 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1708 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1709 -- seem necessary now --SDM 7/2/2008
1711 -----------------------------------------------------------------------------
1714 setOptHpcDir :: String -> DynP ()
1715 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1717 -----------------------------------------------------------------------------
1718 -- Via-C compilation stuff
1720 -- There are some options that we need to pass to gcc when compiling
1721 -- Haskell code via C, but are only supported by recent versions of
1722 -- gcc. The configure script decides which of these options we need,
1723 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1724 -- read before each via-C compilation. The advantage of having these
1725 -- in a separate file is that the file can be created at install-time
1726 -- depending on the available gcc version, and even re-generated later
1727 -- if gcc is upgraded.
1729 -- The options below are not dependent on the version of gcc, only the
1732 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1733 [String]) -- for registerised HC compilations
1734 machdepCCOpts _dflags
1735 #if alpha_TARGET_ARCH
1737 #ifdef HAVE_THREADED_RTS_SUPPORT
1741 -- For now, to suppress the gcc warning "call-clobbered
1742 -- register used for global register variable", we simply
1743 -- disable all warnings altogether using the -w flag. Oh well.
1745 #elif hppa_TARGET_ARCH
1746 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1747 -- (very nice, but too bad the HP /usr/include files don't agree.)
1748 = ( ["-D_HPUX_SOURCE"], [] )
1750 #elif m68k_TARGET_ARCH
1751 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1752 -- popping of args to routines to be explicit; if we let things
1753 -- be deferred 'til after an STGJUMP, imminent death is certain!
1755 -- -fomit-frame-pointer : *don't*
1756 -- It's better to have a6 completely tied up being a frame pointer
1757 -- rather than let GCC pick random things to do with it.
1758 -- (If we want to steal a6, then we would try to do things
1759 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1760 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1762 #elif i386_TARGET_ARCH
1763 -- -fno-defer-pop : basically the same game as for m68k
1765 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1766 -- the fp (%ebp) for our register maps.
1767 = let n_regs = stolen_x86_regs _dflags
1770 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1771 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1774 "-fomit-frame-pointer",
1775 -- we want -fno-builtin, because when gcc inlines
1776 -- built-in functions like memcpy() it tends to
1777 -- run out of registers, requiring -monly-n-regs
1779 "-DSTOLEN_X86_REGS="++show n_regs ]
1782 #elif ia64_TARGET_ARCH
1783 = ( [], ["-fomit-frame-pointer", "-G0"] )
1785 #elif x86_64_TARGET_ARCH
1786 = ( [], ["-fomit-frame-pointer",
1787 "-fno-asynchronous-unwind-tables",
1788 -- the unwind tables are unnecessary for HC code,
1789 -- and get in the way of -split-objs. Another option
1790 -- would be to throw them away in the mangler, but this
1793 -- calling builtins like strlen() using the FFI can
1794 -- cause gcc to run out of regs, so use the external
1798 #elif sparc_TARGET_ARCH
1800 -- For now, to suppress the gcc warning "call-clobbered
1801 -- register used for global register variable", we simply
1802 -- disable all warnings altogether using the -w flag. Oh well.
1804 #elif powerpc_apple_darwin_TARGET
1806 -- Disable Apple's precompiling preprocessor. It's a great thing
1807 -- for "normal" programs, but it doesn't support register variable
1809 = ( [], ["-no-cpp-precomp"] )
1814 picCCOpts :: DynFlags -> [String]
1816 #if darwin_TARGET_OS
1817 -- Apple prefers to do things the other way round.
1818 -- PIC is on by default.
1819 -- -mdynamic-no-pic:
1820 -- Turn off PIC code generation.
1822 -- Don't generate "common" symbols - these are unwanted
1823 -- in dynamic libraries.
1826 = ["-fno-common", "-D__PIC__"]
1828 = ["-mdynamic-no-pic"]
1829 #elif mingw32_TARGET_OS
1830 -- no -fPIC for Windows
1837 = ["-fPIC", "-D__PIC__"]
1842 -- -----------------------------------------------------------------------------
1846 can_split = cSplitObjs == "YES"
1848 -- -----------------------------------------------------------------------------
1851 compilerInfo :: [(String, String)]
1852 compilerInfo = [("Project name", cProjectName),
1853 ("Project version", cProjectVersion),
1854 ("Booter version", cBooterVersion),
1856 ("Interface file version", cHscIfaceFileVersion),
1857 ("Have interpreter", cGhcWithInterpreter),
1858 ("Object splitting", cSplitObjs),
1859 ("Have native code generator", cGhcWithNativeCodeGen),
1860 ("Support SMP", cGhcWithSMP),
1861 ("Unregisterised", cGhcUnregisterised),
1862 ("Tables next to code", cGhcEnableTablesNextToCode),
1863 ("Win32 DLLs", cEnableWin32DLLs),
1864 ("RTS ways", cGhcRTSWays),
1865 ("Leading underscore", cLeadingUnderscore)]