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.
155 | Opt_D_no_debug_output
161 | Opt_WarnIsError -- -Werror; makes warnings fatal
162 | Opt_WarnDuplicateExports
164 | Opt_WarnImplicitPrelude
165 | Opt_WarnIncompletePatterns
166 | Opt_WarnIncompletePatternsRecUpd
167 | Opt_WarnMissingFields
168 | Opt_WarnMissingMethods
169 | Opt_WarnMissingSigs
170 | Opt_WarnNameShadowing
171 | Opt_WarnOverlappingPatterns
172 | Opt_WarnSimplePatterns
173 | Opt_WarnTypeDefaults
174 | Opt_WarnMonomorphism
175 | Opt_WarnUnusedBinds
176 | Opt_WarnUnusedImports
177 | Opt_WarnUnusedMatches
178 | Opt_WarnDeprecations
179 | Opt_WarnDodgyImports
184 | Opt_OverlappingInstances
185 | Opt_UndecidableInstances
186 | Opt_IncoherentInstances
187 | Opt_MonomorphismRestriction
189 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
190 | Opt_ForeignFunctionInterface
191 | Opt_UnliftedFFITypes
192 | Opt_PArr -- Syntactic support for parallel arrays
193 | Opt_Arrows -- Arrow-notation syntax
194 | Opt_TemplateHaskell
198 | Opt_ImplicitPrelude
199 | Opt_ScopedTypeVariables
203 | Opt_OverloadedStrings
204 | Opt_DisambiguateRecordFields
205 | Opt_RecordWildCards
210 | Opt_StandaloneDeriving
211 | Opt_DeriveDataTypeable
212 | Opt_TypeSynonymInstances
213 | Opt_FlexibleContexts
214 | Opt_FlexibleInstances
215 | Opt_ConstrainedClassMethods
216 | Opt_MultiParamTypeClasses
217 | Opt_FunctionalDependencies
219 | Opt_PolymorphicComponents
220 | Opt_ExistentialQuantification
224 | Opt_PatternSignatures
225 | Opt_ParallelListComp
226 | Opt_TransformListComp
227 | Opt_GeneralizedNewtypeDeriving
230 | Opt_LiberalTypeSynonyms
233 | Opt_ImpredicativeTypes
236 | Opt_PrintExplicitForalls
241 | Opt_StaticArgumentTransformation
245 | Opt_IgnoreInterfacePragmas
246 | Opt_OmitInterfacePragmas
247 | Opt_DoLambdaEtaExpansion
251 | Opt_UnboxStrictFields
256 | Opt_RegsGraph -- do graph coloring register allocation
257 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
265 | Opt_ExcessPrecision
266 | Opt_ReadUserPackageConf
270 | Opt_HideAllPackages
271 | Opt_PrintBindResult
275 | Opt_BreakOnException
277 | Opt_PrintEvldWithShow
278 | Opt_PrintBindContents
282 | Opt_ConvertToZipCfgAndBack
293 data DynFlags = DynFlags {
296 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
297 stgToDo :: Maybe [StgToDo], -- similarly
298 hscTarget :: HscTarget,
299 hscOutName :: String, -- name of the output file
300 extCoreName :: String, -- name of the .core output file
301 verbosity :: Int, -- verbosity level
302 optLevel :: Int, -- optimisation level
303 simplPhases :: Int, -- number of simplifier phases
304 maxSimplIterations :: Int, -- max simplifier iterations
305 shouldDumpSimplPhase :: SimplifierMode -> Bool,
306 ruleCheck :: Maybe String,
308 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
309 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
310 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
312 stolen_x86_regs :: Int,
313 cmdlineHcIncludes :: [String], -- -#includes
314 importPaths :: [FilePath],
316 mainFunIs :: Maybe String,
317 ctxtStkDepth :: Int, -- Typechecker context stack depth
319 thisPackage :: PackageId,
322 wayNames :: [WayName], -- way flags from the cmd line
323 buildTag :: String, -- the global "way" (eg. "p" for prof)
324 rtsBuildTag :: String, -- the RTS "way"
327 objectDir :: Maybe String,
328 hiDir :: Maybe String,
329 stubDir :: Maybe String,
335 outputFile :: Maybe String,
336 outputHi :: Maybe String,
337 dynLibLoader :: DynLibLoader,
339 -- | This is set by DriverPipeline.runPipeline based on where
340 -- its output is going.
341 dumpPrefix :: Maybe FilePath,
343 -- | Override the dumpPrefix set by runPipeline.
344 -- Set by -ddump-file-prefix
345 dumpPrefixForce :: Maybe FilePath,
347 includePaths :: [String],
348 libraryPaths :: [String],
349 frameworkPaths :: [String], -- used on darwin only
350 cmdlineFrameworks :: [String], -- ditto
351 tmpDir :: String, -- no trailing '/'
353 ghcUsagePath :: FilePath, -- Filled in by SysTools
354 ghciUsagePath :: FilePath, -- ditto
356 hpcDir :: String, -- ^ path to store the .mix files
358 -- options for particular phases
367 opt_windres :: [String],
369 -- commands for particular phases
371 pgm_P :: (String,[Option]),
373 pgm_c :: (String,[Option]),
374 pgm_m :: (String,[Option]),
375 pgm_s :: (String,[Option]),
376 pgm_a :: (String,[Option]),
377 pgm_l :: (String,[Option]),
378 pgm_dll :: (String,[Option]),
380 pgm_sysman :: String,
381 pgm_windres :: String,
384 extraPkgConfs :: [FilePath],
385 topDir :: FilePath, -- filled in by SysTools
386 systemPackageConfig :: FilePath, -- ditto
387 -- The -package-conf flags given on the command line, in the order
390 packageFlags :: [PackageFlag],
391 -- The -package and -hide-package flags from the command-line
394 -- NB. do not modify this field, it is calculated by
395 -- Packages.initPackages and Packages.updatePackages.
396 pkgDatabase :: Maybe (UniqFM PackageConfig),
397 pkgState :: PackageState,
403 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
405 haddockOptions :: Maybe String
416 -- | will this target result in an object file on the disk?
417 isObjectTarget :: HscTarget -> Bool
418 isObjectTarget HscC = True
419 isObjectTarget HscAsm = True
420 isObjectTarget _ = False
422 -- | The 'GhcMode' tells us whether we're doing multi-module
423 -- compilation (controlled via the "GHC" API) or one-shot
424 -- (single-module) compilation. This makes a difference primarily to
425 -- the "Finder": in one-shot mode we look for interface files for
426 -- imported modules, but in multi-module mode we look for source files
427 -- in order to check whether they need to be recompiled.
429 = CompManager -- ^ --make, GHCi, etc.
430 | OneShot -- ^ ghc -c Foo.hs
431 | MkDepend -- ^ ghc -M, see Finder for why we need this
434 isOneShot :: GhcMode -> Bool
435 isOneShot OneShot = True
436 isOneShot _other = False
438 -- | What kind of linking to do.
439 data GhcLink -- What to do in the link step, if there is one
440 = NoLink -- Don't link at all
441 | LinkBinary -- Link object code into a binary
442 | LinkInMemory -- Use the in-memory dynamic linker
443 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
446 isNoLink :: GhcLink -> Bool
447 isNoLink NoLink = True
451 = ExposePackage String
453 | IgnorePackage String
456 defaultHscTarget :: HscTarget
457 defaultHscTarget = defaultObjectTarget
459 -- | the 'HscTarget' value corresponding to the default way to create
460 -- object files on the current platform.
461 defaultObjectTarget :: HscTarget
463 | cGhcWithNativeCodeGen == "YES" = HscAsm
468 | Wrapped (Maybe String)
472 initDynFlags :: DynFlags -> IO DynFlags
473 initDynFlags dflags = do
474 -- someday these will be dynamic flags
475 ways <- readIORef v_Ways
476 build_tag <- readIORef v_Build_tag
477 rts_build_tag <- readIORef v_RTS_Build_tag
480 buildTag = build_tag,
481 rtsBuildTag = rts_build_tag
484 defaultDynFlags :: DynFlags
487 ghcMode = CompManager,
488 ghcLink = LinkBinary,
491 hscTarget = defaultHscTarget,
497 maxSimplIterations = 4,
498 shouldDumpSimplPhase = const False,
500 specConstrThreshold = Just 200,
501 specConstrCount = Just 3,
502 liberateCaseThreshold = Just 200,
504 cmdlineHcIncludes = [],
508 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
510 thisPackage = mainPackageId,
516 objectSuf = phaseInputExt StopLn,
517 hcSuf = phaseInputExt HCc,
520 outputFile = Nothing,
522 dynLibLoader = Deployable,
523 dumpPrefix = Nothing,
524 dumpPrefixForce = Nothing,
528 cmdlineFrameworks = [],
529 tmpDir = cDEFAULT_TMPDIR,
547 pkgDatabase = Nothing,
548 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
549 haddockOptions = Nothing,
551 Opt_ReadUserPackageConf,
553 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
554 -- behaviour the default, to see if anyone notices
558 Opt_MonomorphismRestriction,
566 Opt_PrintBindContents
568 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
569 -- The default -O0 options
572 log_action = \severity srcSpan style msg ->
574 SevInfo -> hPutStrLn stderr (show (msg style))
575 SevFatal -> hPutStrLn stderr (show (msg style))
576 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
582 0 | print errors & warnings only
583 1 | minimal verbosity: print "compiling M ... done." for each module.
584 2 | equivalent to -dshow-passes
585 3 | equivalent to existing "ghc -v"
586 4 | "ghc -v -ddump-most"
587 5 | "ghc -v -ddump-all"
590 dopt :: DynFlag -> DynFlags -> Bool
591 dopt f dflags = f `elem` (flags dflags)
593 dopt_set :: DynFlags -> DynFlag -> DynFlags
594 dopt_set dfs f = dfs{ flags = f : flags dfs }
596 dopt_unset :: DynFlags -> DynFlag -> DynFlags
597 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
599 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
600 getOpts dflags opts = reverse (opts dflags)
601 -- We add to the options from the front, so we need to reverse the list
603 getVerbFlag :: DynFlags -> String
605 | verbosity dflags >= 3 = "-v"
608 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
609 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
610 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
611 addCmdlineFramework, addHaddockOpts
612 :: String -> DynFlags -> DynFlags
613 setOutputFile, setOutputHi, setDumpPrefixForce
614 :: Maybe String -> DynFlags -> DynFlags
616 setObjectDir f d = d{ objectDir = Just f}
617 setHiDir f d = d{ hiDir = Just f}
618 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
619 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
620 -- #included from the .hc file when compiling with -fvia-C.
622 setObjectSuf f d = d{ objectSuf = f}
623 setHiSuf f d = d{ hiSuf = f}
624 setHcSuf f d = d{ hcSuf = f}
626 setOutputFile f d = d{ outputFile = f}
627 setOutputHi f d = d{ outputHi = f}
629 parseDynLibLoaderMode f d =
631 ("deploy", "") -> d{ dynLibLoader = Deployable }
632 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
633 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
634 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
635 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
636 (_,_) -> error "Unknown dynlib loader"
638 setDumpPrefixForce f d = d { dumpPrefixForce = f}
640 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
641 -- Config.hs should really use Option.
642 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
644 setPgmL f d = d{ pgm_L = f}
645 setPgmF f d = d{ pgm_F = f}
646 setPgmc f d = d{ pgm_c = (f,[])}
647 setPgmm f d = d{ pgm_m = (f,[])}
648 setPgms f d = d{ pgm_s = (f,[])}
649 setPgma f d = d{ pgm_a = (f,[])}
650 setPgml f d = d{ pgm_l = (f,[])}
651 setPgmdll f d = d{ pgm_dll = (f,[])}
652 setPgmwindres f d = d{ pgm_windres = f}
654 addOptL f d = d{ opt_L = f : opt_L d}
655 addOptP f d = d{ opt_P = f : opt_P d}
656 addOptF f d = d{ opt_F = f : opt_F d}
657 addOptc f d = d{ opt_c = f : opt_c d}
658 addOptm f d = d{ opt_m = f : opt_m d}
659 addOpta f d = d{ opt_a = f : opt_a d}
660 addOptl f d = d{ opt_l = f : opt_l d}
661 addOptdep f d = d{ opt_dep = f : opt_dep d}
662 addOptwindres f d = d{ opt_windres = f : opt_windres d}
664 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
666 addHaddockOpts f d = d{ haddockOptions = Just f}
668 -- -----------------------------------------------------------------------------
669 -- Command-line options
671 -- When invoking external tools as part of the compilation pipeline, we
672 -- pass these a sequence of options on the command-line. Rather than
673 -- just using a list of Strings, we use a type that allows us to distinguish
674 -- between filepaths and 'other stuff'. [The reason being, of course, that
675 -- this type gives us a handle on transforming filenames, and filenames only,
676 -- to whatever format they're expected to be on a particular platform.]
679 = FileOption -- an entry that _contains_ filename(s) / filepaths.
680 String -- a non-filepath prefix that shouldn't be
681 -- transformed (e.g., "/out=")
682 String -- the filepath/filename portion
685 -----------------------------------------------------------------------------
686 -- Setting the optimisation level
688 updOptLevel :: Int -> DynFlags -> DynFlags
689 -- Set dynflags appropriate to the optimisation level
691 = dfs2{ optLevel = final_n }
693 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
694 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
695 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
697 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
698 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
700 optLevelFlags :: [([Int], DynFlag)]
702 = [ ([0], Opt_IgnoreInterfacePragmas)
703 , ([0], Opt_OmitInterfacePragmas)
705 , ([1,2], Opt_IgnoreAsserts)
706 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
708 , ([1,2], Opt_DoEtaReduction)
709 , ([1,2], Opt_CaseMerge)
710 , ([1,2], Opt_Strictness)
712 , ([1,2], Opt_FullLaziness)
714 , ([2], Opt_LiberateCase)
715 , ([2], Opt_SpecConstr)
716 , ([2], Opt_StaticArgumentTransformation)
718 , ([0,1,2], Opt_DoLambdaEtaExpansion)
719 -- This one is important for a tiresome reason:
720 -- we want to make sure that the bindings for data
721 -- constructors are eta-expanded. This is probably
722 -- a good thing anyway, but it seems fragile.
725 -- -----------------------------------------------------------------------------
726 -- Standard sets of warning options
728 standardWarnings :: [DynFlag]
730 = [ Opt_WarnDeprecations,
731 Opt_WarnOverlappingPatterns,
732 Opt_WarnMissingFields,
733 Opt_WarnMissingMethods,
734 Opt_WarnDuplicateExports
737 minusWOpts :: [DynFlag]
739 = standardWarnings ++
740 [ Opt_WarnUnusedBinds,
741 Opt_WarnUnusedMatches,
742 Opt_WarnUnusedImports,
743 Opt_WarnIncompletePatterns,
747 minusWallOpts :: [DynFlag]
750 [ Opt_WarnTypeDefaults,
751 Opt_WarnNameShadowing,
757 -- minuswRemovesOpts should be every warning option
758 minuswRemovesOpts :: [DynFlag]
761 [Opt_WarnImplicitPrelude,
762 Opt_WarnIncompletePatternsRecUpd,
763 Opt_WarnSimplePatterns,
764 Opt_WarnMonomorphism,
768 -- -----------------------------------------------------------------------------
769 -- CoreToDo: abstraction of core-to-core passes to run.
771 data CoreToDo -- These are diff core-to-core passes,
772 -- which may be invoked in any order,
773 -- as many times as you like.
775 = CoreDoSimplify -- The core-to-core simplifier.
778 -- Each run of the simplifier can take a different
779 -- set of simplifier-specific flags.
781 | CoreDoFloatOutwards FloatOutSwitches
786 | CoreDoWorkerWrapper
789 | CoreDoOldStrictness
792 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
793 -- matching this string
794 | CoreDoVectorisation
795 | CoreDoNothing -- Useful when building up
796 | CoreDoPasses [CoreToDo] -- lists of these things
798 data SimplifierMode -- See comments in SimplMonad
800 | SimplPhase Int [String]
802 data SimplifierSwitch
803 = MaxSimplifierIterations Int
806 data FloatOutSwitches
807 = FloatOutSw Bool -- True <=> float lambdas to top level
808 Bool -- True <=> float constants to top level,
809 -- even if they do not escape a lambda
812 -- The core-to-core pass ordering is derived from the DynFlags:
813 runWhen :: Bool -> CoreToDo -> CoreToDo
814 runWhen True do_this = do_this
815 runWhen False _ = CoreDoNothing
817 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
818 runMaybe (Just x) f = f x
819 runMaybe Nothing _ = CoreDoNothing
821 getCoreToDo :: DynFlags -> [CoreToDo]
823 | Just todo <- coreToDo dflags = todo -- set explicitly by user
824 | otherwise = core_todo
826 opt_level = optLevel dflags
827 phases = simplPhases dflags
828 max_iter = maxSimplIterations dflags
829 strictness = dopt Opt_Strictness dflags
830 full_laziness = dopt Opt_FullLaziness dflags
831 cse = dopt Opt_CSE dflags
832 spec_constr = dopt Opt_SpecConstr dflags
833 liberate_case = dopt Opt_LiberateCase dflags
834 rule_check = ruleCheck dflags
835 vectorisation = dopt Opt_Vectorise dflags
836 -- static_args = dopt Opt_StaticArgumentTransformation dflags
838 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
840 simpl_phase phase names iter
842 [ CoreDoSimplify (SimplPhase phase names) [
843 MaxSimplifierIterations iter
845 maybe_rule_check phase
848 -- By default, we have 2 phases before phase 0.
850 -- Want to run with inline phase 2 after the specialiser to give
851 -- maximum chance for fusion to work before we inline build/augment
852 -- in phase 1. This made a difference in 'ansi' where an
853 -- overloaded function wasn't inlined till too late.
855 -- Need phase 1 so that build/augment get
856 -- inlined. I found that spectral/hartel/genfft lost some useful
857 -- strictness in the function sumcode' if augment is not inlined
858 -- before strictness analysis runs
859 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
860 | phase <- [phases, phases-1 .. 1] ]
863 -- initial simplify: mk specialiser happy: minimum effort please
864 simpl_gently = CoreDoSimplify SimplGently [
866 -- Don't inline anything till full laziness has bitten
867 -- In particular, inlining wrappers inhibits floating
868 -- e.g. ...(case f x of ...)...
869 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
870 -- ==> ...(case x of I# x# -> case fw x# of ...)...
871 -- and now the redex (f x) isn't floatable any more
872 -- Similarly, don't apply any rules until after full
873 -- laziness. Notably, list fusion can prevent floating.
875 NoCaseOfCase, -- Don't do case-of-case transformations.
876 -- This makes full laziness work better
877 MaxSimplifierIterations max_iter
881 if opt_level == 0 then
882 [runWhen vectorisation (CoreDoPasses [ simpl_gently, CoreDoVectorisation ]),
883 simpl_phase 0 ["final"] max_iter]
884 else {- opt_level >= 1 -} [
886 -- We want to do the static argument transform before full laziness as it
887 -- may expose extra opportunities to float things outwards. However, to fix
888 -- up the output of the transformation we need at do at least one simplify
889 -- after this before anything else
890 -- runWhen static_args CoreDoStaticArgs,
891 -- XXX disabled, see #2321
893 -- initial simplify: mk specialiser happy: minimum effort please
896 -- We run vectorisation here for now, but we might also try to run
898 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
900 -- Specialisation is best done before full laziness
901 -- so that overloaded functions have all their dictionary lambdas manifest
904 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
910 -- Phase 0: allow all Ids to be inlined now
911 -- This gets foldr inlined before strictness analysis
913 -- At least 3 iterations because otherwise we land up with
914 -- huge dead expressions because of an infelicity in the
916 -- let k = BIG in foldr k z xs
917 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
918 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
920 simpl_phase 0 ["main"] (max max_iter 3),
923 #ifdef OLD_STRICTNESS
926 runWhen strictness (CoreDoPasses [
930 simpl_phase 0 ["post-worker-wrapper"] max_iter
933 runWhen full_laziness
934 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
935 True)), -- Float constants
936 -- nofib/spectral/hartel/wang doubles in speed if you
937 -- do full laziness late in the day. It only happens
938 -- after fusion and other stuff, so the early pass doesn't
939 -- catch it. For the record, the redex is
940 -- f_el22 (f_el21 r_midblock)
944 -- We want CSE to follow the final full-laziness pass, because it may
945 -- succeed in commoning up things floated out by full laziness.
946 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
952 -- Case-liberation for -O2. This should be after
953 -- strictness analysis and the simplification which follows it.
954 runWhen liberate_case (CoreDoPasses [
956 simpl_phase 0 ["post-liberate-case"] max_iter
957 ]), -- Run the simplifier after LiberateCase to vastly
958 -- reduce the possiblility of shadowing
959 -- Reason: see Note [Shadowing] in SpecConstr.lhs
961 runWhen spec_constr CoreDoSpecConstr,
965 -- Final clean-up simplification:
966 simpl_phase 0 ["final"] max_iter
969 -- -----------------------------------------------------------------------------
970 -- StgToDo: abstraction of stg-to-stg passes to run.
973 = StgDoMassageForProfiling -- should be (next to) last
974 -- There's also setStgVarInfo, but its absolute "lastness"
975 -- is so critical that it is hardwired in (no flag).
978 getStgToDo :: DynFlags -> [StgToDo]
980 | Just todo <- stgToDo dflags = todo -- set explicitly by user
983 stg_stats = dopt Opt_StgStats dflags
985 todo1 = if stg_stats then [D_stg_stats] else []
987 todo2 | WayProf `elem` wayNames dflags
988 = StgDoMassageForProfiling : todo1
992 -- -----------------------------------------------------------------------------
996 allFlags = map ('-':) $
997 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
998 map ("fno-"++) flags ++
1002 where ok (PrefixPred _ _) = False
1004 flags = map fst fFlags
1007 dynamic_flags :: [(String, OptKind DynP)]
1009 ( "n" , NoArg (setDynFlag Opt_DryRun) )
1010 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
1011 , ( "F" , NoArg (setDynFlag Opt_Pp))
1012 , ( "#include" , HasArg (addCmdlineHCInclude) )
1013 , ( "v" , OptIntSuffix setVerbosity )
1015 ------- Specific phases --------------------------------------------
1016 , ( "pgmL" , HasArg (upd . setPgmL) )
1017 , ( "pgmP" , HasArg (upd . setPgmP) )
1018 , ( "pgmF" , HasArg (upd . setPgmF) )
1019 , ( "pgmc" , HasArg (upd . setPgmc) )
1020 , ( "pgmm" , HasArg (upd . setPgmm) )
1021 , ( "pgms" , HasArg (upd . setPgms) )
1022 , ( "pgma" , HasArg (upd . setPgma) )
1023 , ( "pgml" , HasArg (upd . setPgml) )
1024 , ( "pgmdll" , HasArg (upd . setPgmdll) )
1025 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
1027 , ( "optL" , HasArg (upd . addOptL) )
1028 , ( "optP" , HasArg (upd . addOptP) )
1029 , ( "optF" , HasArg (upd . addOptF) )
1030 , ( "optc" , HasArg (upd . addOptc) )
1031 , ( "optm" , HasArg (upd . addOptm) )
1032 , ( "opta" , HasArg (upd . addOpta) )
1033 , ( "optl" , HasArg (upd . addOptl) )
1034 , ( "optdep" , HasArg (upd . addOptdep) )
1035 , ( "optwindres" , HasArg (upd . addOptwindres) )
1037 , ( "split-objs" , NoArg (if can_split
1038 then setDynFlag Opt_SplitObjs
1041 -------- Linking ----------------------------------------------------
1042 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1043 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1044 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1045 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1047 ------- Libraries ---------------------------------------------------
1048 , ( "L" , Prefix addLibraryPath )
1049 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1051 ------- Frameworks --------------------------------------------------
1052 -- -framework-path should really be -F ...
1053 , ( "framework-path" , HasArg addFrameworkPath )
1054 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1056 ------- Output Redirection ------------------------------------------
1057 , ( "odir" , HasArg (upd . setObjectDir))
1058 , ( "o" , SepArg (upd . setOutputFile . Just))
1059 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1060 , ( "osuf" , HasArg (upd . setObjectSuf))
1061 , ( "hcsuf" , HasArg (upd . setHcSuf))
1062 , ( "hisuf" , HasArg (upd . setHiSuf))
1063 , ( "hidir" , HasArg (upd . setHiDir))
1064 , ( "tmpdir" , HasArg (upd . setTmpDir))
1065 , ( "stubdir" , HasArg (upd . setStubDir))
1066 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1068 ------- Keeping temporary files -------------------------------------
1069 -- These can be singular (think ghc -c) or plural (think ghc --make)
1070 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1071 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1072 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1073 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1074 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1075 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1076 -- This only makes sense as plural
1077 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1079 ------- Miscellaneous ----------------------------------------------
1080 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1081 , ( "main-is" , SepArg setMainIs )
1082 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1083 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1084 , ( "hpcdir" , SepArg setOptHpcDir )
1086 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1087 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1088 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1090 ------- Packages ----------------------------------------------------
1091 , ( "package-conf" , HasArg extraPkgConf_ )
1092 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1093 , ( "package-name" , HasArg (upd . setPackageName) )
1094 , ( "package" , HasArg exposePackage )
1095 , ( "hide-package" , HasArg hidePackage )
1096 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1097 , ( "ignore-package" , HasArg ignorePackage )
1098 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1100 ------ HsCpp opts ---------------------------------------------------
1101 , ( "D", AnySuffix (upd . addOptP) )
1102 , ( "U", AnySuffix (upd . addOptP) )
1104 ------- Include/Import Paths ----------------------------------------
1105 , ( "I" , Prefix addIncludePath)
1106 , ( "i" , OptPrefix addImportPath )
1108 ------ Debugging ----------------------------------------------------
1109 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1111 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1112 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1113 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1114 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1115 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1116 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1117 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1118 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1119 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1120 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1121 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1122 , ( "ddump-asm-regalloc-stages",
1123 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1124 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1125 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1126 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1127 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1128 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1129 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1130 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1131 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1132 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1133 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1134 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1135 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1136 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1137 , ( "ddump-simpl-phases", OptPrefix setDumpSimplPhases)
1138 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1139 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1140 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1141 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1142 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1143 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1144 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1145 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1146 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1147 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1148 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1149 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1150 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1151 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1152 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1153 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1154 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1155 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1156 , ( "dverbose-core2core", NoArg setVerboseCore2Core)
1157 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1158 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1159 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1160 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1161 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1162 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1163 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1164 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1165 , ( "ddump-hi-diffs", setDumpFlag Opt_D_dump_hi_diffs)
1167 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1168 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1169 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1170 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1171 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1172 setVerbosity (Just 2)) )
1173 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1175 ------ Machine dependant (-m<blah>) stuff ---------------------------
1177 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1178 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1179 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1181 ------ Warning opts -------------------------------------------------
1182 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1183 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1184 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1185 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1186 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1187 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1189 ------ Optimisation flags ------------------------------------------
1190 , ( "O" , NoArg (upd (setOptLevel 1)))
1191 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1192 , ( "Odph" , NoArg (upd setDPHOpt))
1193 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1194 -- If the number is missing, use 1
1196 , ( "fsimplifier-phases", IntSuffix (\n ->
1197 upd (\dfs -> dfs{ simplPhases = n })) )
1198 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1199 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1201 , ( "fspec-constr-threshold", IntSuffix (\n ->
1202 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1203 , ( "fno-spec-constr-threshold", NoArg (
1204 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1205 , ( "fspec-constr-count", IntSuffix (\n ->
1206 upd (\dfs -> dfs{ specConstrCount = Just n })))
1207 , ( "fno-spec-constr-count", NoArg (
1208 upd (\dfs -> dfs{ specConstrCount = Nothing })))
1209 , ( "fliberate-case-threshold", IntSuffix (\n ->
1210 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1211 , ( "fno-liberate-case-threshold", NoArg (
1212 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1214 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1215 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1217 ------ Compiler flags -----------------------------------------------
1219 , ( "fasm", NoArg (setObjTarget HscAsm) )
1220 , ( "fvia-c", NoArg (setObjTarget HscC) )
1221 , ( "fvia-C", NoArg (setObjTarget HscC) )
1223 , ( "fno-code", NoArg (setTarget HscNothing))
1224 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1225 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1227 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1228 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1230 -- the rest of the -f* and -fno-* flags
1231 , ( "f", PrefixPred (isFlag fFlags)
1232 (\f -> setDynFlag (getFlag fFlags f)) )
1233 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1234 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1236 -- the -X* and -XNo* flags
1237 , ( "X", PrefixPred (isFlag xFlags)
1238 (\f -> setDynFlag (getFlag xFlags f)) )
1239 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1240 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1243 -- these -f<blah> flags can all be reversed with -fno-<blah>
1245 fFlags :: [(String, DynFlag)]
1247 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1248 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1249 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1250 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1251 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1252 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1253 ( "warn-missing-fields", Opt_WarnMissingFields ),
1254 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1255 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1256 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1257 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1258 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1259 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1260 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1261 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1262 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1263 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1264 ( "warn-deprecations", Opt_WarnDeprecations ),
1265 ( "warn-orphans", Opt_WarnOrphans ),
1266 ( "warn-tabs", Opt_WarnTabs ),
1267 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1268 ( "strictness", Opt_Strictness ),
1269 ( "static-argument-transformation", Opt_StaticArgumentTransformation ),
1270 ( "full-laziness", Opt_FullLaziness ),
1271 ( "liberate-case", Opt_LiberateCase ),
1272 ( "spec-constr", Opt_SpecConstr ),
1274 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1275 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1276 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1277 ( "ignore-asserts", Opt_IgnoreAsserts ),
1278 ( "do-eta-reduction", Opt_DoEtaReduction ),
1279 ( "case-merge", Opt_CaseMerge ),
1280 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1281 ( "method-sharing", Opt_MethodSharing ),
1282 ( "dicts-cheap", Opt_DictsCheap ),
1283 ( "excess-precision", Opt_ExcessPrecision ),
1284 ( "asm-mangling", Opt_DoAsmMangling ),
1285 ( "print-bind-result", Opt_PrintBindResult ),
1286 ( "force-recomp", Opt_ForceRecomp ),
1287 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1288 ( "rewrite-rules", Opt_RewriteRules ),
1289 ( "break-on-exception", Opt_BreakOnException ),
1290 ( "break-on-error", Opt_BreakOnError ),
1291 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1292 ( "print-bind-contents", Opt_PrintBindContents ),
1293 ( "run-cps", Opt_RunCPSZ ),
1294 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1295 ( "vectorise", Opt_Vectorise ),
1296 ( "regs-graph", Opt_RegsGraph),
1297 ( "regs-iterative", Opt_RegsIterative),
1298 -- Deprecated in favour of -XTemplateHaskell:
1299 ( "th", Opt_TemplateHaskell ),
1300 -- Deprecated in favour of -XForeignFunctionInterface:
1301 ( "fi", Opt_ForeignFunctionInterface ),
1302 -- Deprecated in favour of -XForeignFunctionInterface:
1303 ( "ffi", Opt_ForeignFunctionInterface ),
1304 -- Deprecated in favour of -XArrows:
1305 ( "arrows", Opt_Arrows ),
1306 -- Deprecated in favour of -XGenerics:
1307 ( "generics", Opt_Generics ),
1308 -- Deprecated in favour of -XImplicitPrelude:
1309 ( "implicit-prelude", Opt_ImplicitPrelude ),
1310 -- Deprecated in favour of -XBangPatterns:
1311 ( "bang-patterns", Opt_BangPatterns ),
1312 -- Deprecated in favour of -XMonomorphismRestriction:
1313 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1314 -- Deprecated in favour of -XMonoPatBinds:
1315 ( "mono-pat-binds", Opt_MonoPatBinds ),
1316 -- Deprecated in favour of -XExtendedDefaultRules:
1317 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1318 -- Deprecated in favour of -XImplicitParams:
1319 ( "implicit-params", Opt_ImplicitParams ),
1320 -- Deprecated in favour of -XScopedTypeVariables:
1321 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1322 -- Deprecated in favour of -XPArr:
1323 ( "parr", Opt_PArr ),
1324 -- Deprecated in favour of -XOverlappingInstances:
1325 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1326 -- Deprecated in favour of -XUndecidableInstances:
1327 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1328 -- Deprecated in favour of -XIncoherentInstances:
1329 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1330 ( "gen-manifest", Opt_GenManifest ),
1331 ( "embed-manifest", Opt_EmbedManifest )
1334 supportedLanguages :: [String]
1335 supportedLanguages = map fst xFlags
1337 -- These -X<blah> flags can all be reversed with -XNo<blah>
1338 xFlags :: [(String, DynFlag)]
1341 ( "PatternGuards", Opt_PatternGuards ),
1342 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1343 ( "MagicHash", Opt_MagicHash ),
1344 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1345 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1346 ( "KindSignatures", Opt_KindSignatures ),
1347 ( "PatternSignatures", Opt_PatternSignatures ),
1348 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1349 ( "ParallelListComp", Opt_ParallelListComp ),
1350 ( "TransformListComp", Opt_TransformListComp ),
1351 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1352 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1353 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1354 ( "Rank2Types", Opt_Rank2Types ),
1355 ( "RankNTypes", Opt_RankNTypes ),
1356 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1357 ( "TypeOperators", Opt_TypeOperators ),
1358 ( "RecursiveDo", Opt_RecursiveDo ),
1359 ( "Arrows", Opt_Arrows ),
1360 ( "PArr", Opt_PArr ),
1361 ( "TemplateHaskell", Opt_TemplateHaskell ),
1362 ( "QuasiQuotes", Opt_QuasiQuotes ),
1363 ( "Generics", Opt_Generics ),
1365 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1366 ( "RecordWildCards", Opt_RecordWildCards ),
1367 ( "RecordPuns", Opt_RecordPuns ),
1368 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1369 ( "OverloadedStrings", Opt_OverloadedStrings ),
1370 ( "GADTs", Opt_GADTs ),
1371 ( "ViewPatterns", Opt_ViewPatterns),
1372 ( "TypeFamilies", Opt_TypeFamilies ),
1373 ( "BangPatterns", Opt_BangPatterns ),
1375 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1376 -- On by default (which is not strictly H98):
1377 ( "MonoPatBinds", Opt_MonoPatBinds ),
1378 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1379 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1380 ( "ImplicitParams", Opt_ImplicitParams ),
1381 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1382 ( "UnboxedTuples", Opt_UnboxedTuples ),
1383 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1384 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1385 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1386 ( "FlexibleContexts", Opt_FlexibleContexts ),
1387 ( "FlexibleInstances", Opt_FlexibleInstances ),
1388 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1389 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1390 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1391 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1392 ( "OverlappingInstances", Opt_OverlappingInstances ),
1393 ( "UndecidableInstances", Opt_UndecidableInstances ),
1394 ( "IncoherentInstances", Opt_IncoherentInstances )
1397 impliedFlags :: [(DynFlag, [DynFlag])]
1399 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1400 -- be completely rigid for GADTs
1401 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1402 -- Note [Scoped tyvars] in TcBinds
1405 glasgowExtsFlags :: [DynFlag]
1406 glasgowExtsFlags = [
1407 Opt_PrintExplicitForalls
1408 , Opt_ForeignFunctionInterface
1409 , Opt_UnliftedFFITypes
1411 , Opt_ImplicitParams
1412 , Opt_ScopedTypeVariables
1414 , Opt_TypeSynonymInstances
1415 , Opt_StandaloneDeriving
1416 , Opt_DeriveDataTypeable
1417 , Opt_FlexibleContexts
1418 , Opt_FlexibleInstances
1419 , Opt_ConstrainedClassMethods
1420 , Opt_MultiParamTypeClasses
1421 , Opt_FunctionalDependencies
1423 , Opt_PolymorphicComponents
1424 , Opt_ExistentialQuantification
1427 , Opt_LiberalTypeSynonyms
1429 , Opt_ImpredicativeTypes
1432 , Opt_ParallelListComp
1433 , Opt_EmptyDataDecls
1434 , Opt_KindSignatures
1435 , Opt_PatternSignatures
1436 , Opt_GeneralizedNewtypeDeriving
1437 , Opt_TypeFamilies ]
1440 isFlag :: [(String,a)] -> String -> Bool
1441 isFlag flags f = any (\(ff,_) -> ff == f) flags
1443 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1444 isPrefFlag pref flags no_f
1445 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1449 getFlag :: [(String,a)] -> String -> a
1450 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1452 [] -> panic ("get_flag " ++ f)
1454 getPrefFlag :: String -> [(String,a)] -> String -> a
1455 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1456 -- We should only be passed flags which match the prefix
1458 -- -----------------------------------------------------------------------------
1459 -- Parsing the dynamic flags.
1461 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1462 parseDynamicFlags dflags args = do
1463 let ((leftover,errs),dflags')
1464 = runCmdLine (processArgs dynamic_flags args) dflags
1465 when (not (null errs)) $ do
1466 throwDyn (UsageError (unlines errs))
1467 return (dflags', leftover)
1470 type DynP = CmdLineP DynFlags
1472 upd :: (DynFlags -> DynFlags) -> DynP ()
1474 dfs <- getCmdLineState
1475 putCmdLineState $! (f dfs)
1477 --------------------------
1478 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1479 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1481 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1482 -- When you set f, set the ones it implies
1483 -- When you un-set f, however, we don't un-set the things it implies
1484 -- (except for -fno-glasgow-exts, which is treated specially)
1486 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1488 --------------------------
1489 setDumpFlag :: DynFlag -> OptKind DynP
1490 setDumpFlag dump_flag
1491 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1492 | otherwise = NoArg (setDynFlag dump_flag)
1494 -- Whenver we -ddump, switch off the recompilation checker,
1495 -- else you don't see the dump!
1496 -- However, certain dumpy-things are really interested in what's going
1497 -- on during recompilation checking, so in those cases we
1498 -- don't want to turn it off.
1499 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1500 Opt_D_dump_hi_diffs]
1502 setVerboseCore2Core :: DynP ()
1503 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1504 setDynFlag Opt_D_verbose_core2core
1505 upd (\s -> s { shouldDumpSimplPhase = const True })
1507 setDumpSimplPhases :: String -> DynP ()
1508 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1509 upd (\s -> s { shouldDumpSimplPhase = spec })
1511 spec :: SimplifierMode -> Bool
1513 . map (join (&&) . map match . split ':')
1519 join :: (Bool -> Bool -> Bool)
1520 -> [SimplifierMode -> Bool]
1521 -> SimplifierMode -> Bool
1522 join _ [] = const True
1523 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1525 match :: String -> SimplifierMode -> Bool
1526 match "" = const True
1527 match s = case reads s of
1528 [(n,"")] -> phase_num n
1531 phase_num :: Int -> SimplifierMode -> Bool
1532 phase_num n (SimplPhase k _) = n == k
1533 phase_num _ _ = False
1535 phase_name :: String -> SimplifierMode -> Bool
1536 phase_name s SimplGently = s == "gentle"
1537 phase_name s (SimplPhase _ ss) = s `elem` ss
1539 setVerbosity :: Maybe Int -> DynP ()
1540 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1542 addCmdlineHCInclude :: String -> DynP ()
1543 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1545 extraPkgConf_ :: FilePath -> DynP ()
1546 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1548 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1550 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1552 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1554 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1556 setPackageName :: String -> DynFlags -> DynFlags
1558 | Nothing <- unpackPackageId pid
1559 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1561 = \s -> s{ thisPackage = pid }
1563 pid = stringToPackageId p
1565 -- If we're linking a binary, then only targets that produce object
1566 -- code are allowed (requests for other target types are ignored).
1567 setTarget :: HscTarget -> DynP ()
1568 setTarget l = upd set
1571 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1574 -- Changes the target only if we're compiling object code. This is
1575 -- used by -fasm and -fvia-C, which switch from one to the other, but
1576 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1577 -- can be safely used in an OPTIONS_GHC pragma.
1578 setObjTarget :: HscTarget -> DynP ()
1579 setObjTarget l = upd set
1582 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1585 setOptLevel :: Int -> DynFlags -> DynFlags
1586 setOptLevel n dflags
1587 | hscTarget dflags == HscInterpreted && n > 0
1589 -- not in IO any more, oh well:
1590 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1592 = updOptLevel n dflags
1595 -- -Odph is equivalent to
1597 -- -O2 optimise as much as possible
1598 -- -fno-method-sharing sharing specialisation defeats fusion
1600 -- -fdicts-cheap always inline dictionaries
1601 -- -fmax-simplifier-iterations20 this is necessary sometimes
1602 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1604 setDPHOpt :: DynFlags -> DynFlags
1605 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1606 , specConstrThreshold = Nothing
1608 `dopt_set` Opt_DictsCheap
1609 `dopt_unset` Opt_MethodSharing
1613 setMainIs :: String -> DynP ()
1615 | not (null main_fn) && isLower (head main_fn)
1616 -- The arg looked like "Foo.Bar.baz"
1617 = upd $ \d -> d{ mainFunIs = Just main_fn,
1618 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1620 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1621 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1623 | otherwise -- The arg looked like "baz"
1624 = upd $ \d -> d{ mainFunIs = Just arg }
1626 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1628 -----------------------------------------------------------------------------
1629 -- Paths & Libraries
1631 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1633 -- -i on its own deletes the import paths
1634 addImportPath "" = upd (\s -> s{importPaths = []})
1635 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1639 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1642 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1644 addFrameworkPath p =
1645 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1647 #ifndef mingw32_TARGET_OS
1648 split_marker :: Char
1649 split_marker = ':' -- not configurable (ToDo)
1652 splitPathList :: String -> [String]
1653 splitPathList s = filter notNull (splitUp s)
1654 -- empty paths are ignored: there might be a trailing
1655 -- ':' in the initial list, for example. Empty paths can
1656 -- cause confusion when they are translated into -I options
1657 -- for passing to gcc.
1659 #ifndef mingw32_TARGET_OS
1660 splitUp xs = split split_marker xs
1662 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1664 -- That is, if "foo:bar:baz" is used, this interpreted as
1665 -- consisting of three entries, 'foo', 'bar', 'baz'.
1666 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1667 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1669 -- Notice that no attempt is made to fully replace the 'standard'
1670 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1671 -- that this will cause too much breakage for users & ':' will
1672 -- work fine even with DOS paths, if you're not insisting on being silly.
1675 splitUp (x:':':div:xs) | div `elem` dir_markers
1676 = ((x:':':div:p): splitUp rs)
1678 (p,rs) = findNextPath xs
1679 -- we used to check for existence of the path here, but that
1680 -- required the IO monad to be threaded through the command-line
1681 -- parser which is quite inconvenient. The
1682 splitUp xs = cons p (splitUp rs)
1684 (p,rs) = findNextPath xs
1689 -- will be called either when we've consumed nought or the
1690 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1691 -- finding the next split marker.
1693 case break (`elem` split_markers) xs of
1694 (p, _:ds) -> (p, ds)
1697 split_markers :: [Char]
1698 split_markers = [':', ';']
1700 dir_markers :: [Char]
1701 dir_markers = ['/', '\\']
1704 -- -----------------------------------------------------------------------------
1705 -- tmpDir, where we store temporary files.
1707 setTmpDir :: FilePath -> DynFlags -> DynFlags
1708 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1709 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1710 -- seem necessary now --SDM 7/2/2008
1712 -----------------------------------------------------------------------------
1715 setOptHpcDir :: String -> DynP ()
1716 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1718 -----------------------------------------------------------------------------
1719 -- Via-C compilation stuff
1721 -- There are some options that we need to pass to gcc when compiling
1722 -- Haskell code via C, but are only supported by recent versions of
1723 -- gcc. The configure script decides which of these options we need,
1724 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1725 -- read before each via-C compilation. The advantage of having these
1726 -- in a separate file is that the file can be created at install-time
1727 -- depending on the available gcc version, and even re-generated later
1728 -- if gcc is upgraded.
1730 -- The options below are not dependent on the version of gcc, only the
1733 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1734 [String]) -- for registerised HC compilations
1735 machdepCCOpts _dflags
1736 #if alpha_TARGET_ARCH
1738 #ifdef HAVE_THREADED_RTS_SUPPORT
1742 -- For now, to suppress the gcc warning "call-clobbered
1743 -- register used for global register variable", we simply
1744 -- disable all warnings altogether using the -w flag. Oh well.
1746 #elif hppa_TARGET_ARCH
1747 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1748 -- (very nice, but too bad the HP /usr/include files don't agree.)
1749 = ( ["-D_HPUX_SOURCE"], [] )
1751 #elif m68k_TARGET_ARCH
1752 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1753 -- popping of args to routines to be explicit; if we let things
1754 -- be deferred 'til after an STGJUMP, imminent death is certain!
1756 -- -fomit-frame-pointer : *don't*
1757 -- It's better to have a6 completely tied up being a frame pointer
1758 -- rather than let GCC pick random things to do with it.
1759 -- (If we want to steal a6, then we would try to do things
1760 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1761 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1763 #elif i386_TARGET_ARCH
1764 -- -fno-defer-pop : basically the same game as for m68k
1766 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1767 -- the fp (%ebp) for our register maps.
1768 = let n_regs = stolen_x86_regs _dflags
1771 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1772 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1775 "-fomit-frame-pointer",
1776 -- we want -fno-builtin, because when gcc inlines
1777 -- built-in functions like memcpy() it tends to
1778 -- run out of registers, requiring -monly-n-regs
1780 "-DSTOLEN_X86_REGS="++show n_regs ]
1783 #elif ia64_TARGET_ARCH
1784 = ( [], ["-fomit-frame-pointer", "-G0"] )
1786 #elif x86_64_TARGET_ARCH
1787 = ( [], ["-fomit-frame-pointer",
1788 "-fno-asynchronous-unwind-tables",
1789 -- the unwind tables are unnecessary for HC code,
1790 -- and get in the way of -split-objs. Another option
1791 -- would be to throw them away in the mangler, but this
1794 -- calling builtins like strlen() using the FFI can
1795 -- cause gcc to run out of regs, so use the external
1799 #elif sparc_TARGET_ARCH
1801 -- For now, to suppress the gcc warning "call-clobbered
1802 -- register used for global register variable", we simply
1803 -- disable all warnings altogether using the -w flag. Oh well.
1805 #elif powerpc_apple_darwin_TARGET
1807 -- Disable Apple's precompiling preprocessor. It's a great thing
1808 -- for "normal" programs, but it doesn't support register variable
1810 = ( [], ["-no-cpp-precomp"] )
1815 picCCOpts :: DynFlags -> [String]
1817 #if darwin_TARGET_OS
1818 -- Apple prefers to do things the other way round.
1819 -- PIC is on by default.
1820 -- -mdynamic-no-pic:
1821 -- Turn off PIC code generation.
1823 -- Don't generate "common" symbols - these are unwanted
1824 -- in dynamic libraries.
1827 = ["-fno-common", "-D__PIC__"]
1829 = ["-mdynamic-no-pic"]
1830 #elif mingw32_TARGET_OS
1831 -- no -fPIC for Windows
1838 = ["-fPIC", "-D__PIC__"]
1843 -- -----------------------------------------------------------------------------
1847 can_split = cSplitObjs == "YES"
1849 -- -----------------------------------------------------------------------------
1852 compilerInfo :: [(String, String)]
1853 compilerInfo = [("Project name", cProjectName),
1854 ("Project version", cProjectVersion),
1855 ("Booter version", cBooterVersion),
1857 ("Interface file version", cHscIfaceFileVersion),
1858 ("Have interpreter", cGhcWithInterpreter),
1859 ("Object splitting", cSplitObjs),
1860 ("Have native code generator", cGhcWithNativeCodeGen),
1861 ("Support SMP", cGhcWithSMP),
1862 ("Unregisterised", cGhcUnregisterised),
1863 ("Tables next to code", cGhcEnableTablesNextToCode),
1864 ("Win32 DLLs", cEnableWin32DLLs),
1865 ("RTS ways", cGhcRTSWays),
1866 ("Leading underscore", cLeadingUnderscore),
1867 ("Debug on", show debugIsOn)