2 {-# OPTIONS -fno-warn-missing-fields #-}
4 -- The above warning supression flag is a temporary kludge.
5 -- While working on this module you are encouraged to remove it and fix
6 -- any warnings in the module. See
7 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
10 -----------------------------------------------------------------------------
14 -- Most flags are dynamic flags, which means they can change from
15 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
16 -- multi-session GHC each session can be using different dynamic
17 -- flags. Dynamic flags can also be set at the prompt in GHCi.
19 -- (c) The University of Glasgow 2005
21 -----------------------------------------------------------------------------
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
35 -- Configuration of the core-to-core and stg-to-stg phases
39 SimplifierMode(..), FloatOutSwitches(..),
40 getCoreToDo, getStgToDo,
42 -- Manipulating DynFlags
43 defaultDynFlags, -- DynFlags
44 initDynFlags, -- DynFlags -> IO DynFlags
46 dopt, -- DynFlag -> DynFlags -> Bool
47 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
48 getOpts, -- (DynFlags -> [a]) -> IO [a]
59 machdepCCOpts, picCCOpts,
64 #include "HsVersions.h"
68 import PrelNames ( mAIN )
69 #ifdef i386_TARGET_ARCH
70 import StaticFlags ( opt_Static )
72 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
74 import {-# SOURCE #-} Packages (PackageState)
75 import DriverPhases ( Phase(..), phaseInputExt )
78 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
79 import Panic ( panic, GhcException(..) )
80 import UniqFM ( UniqFM )
82 import Maybes ( orElse, fromJust )
83 import SrcLoc ( SrcSpan )
85 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
87 import Data.IORef ( readIORef )
88 import Control.Exception ( throwDyn )
89 import Control.Monad ( when )
90 #ifdef mingw32_TARGET_OS
91 import Data.List ( isPrefixOf )
97 import System.FilePath
98 import System.IO ( hPutStrLn, stderr )
100 -- -----------------------------------------------------------------------------
108 | Opt_D_dump_cmmz_pretty
112 | Opt_D_dump_asm_native
113 | Opt_D_dump_asm_liveness
114 | Opt_D_dump_asm_coalesce
115 | Opt_D_dump_asm_regalloc
116 | Opt_D_dump_asm_regalloc_stages
117 | Opt_D_dump_asm_conflicts
118 | Opt_D_dump_asm_stats
124 | Opt_D_dump_inlinings
125 | Opt_D_dump_rule_firings
126 | Opt_D_dump_occur_anal
130 | Opt_D_dump_simpl_iterations
131 | Opt_D_dump_simpl_phases
140 | Opt_D_dump_worker_wrapper
141 | Opt_D_dump_rn_trace
142 | Opt_D_dump_rn_stats
144 | Opt_D_dump_simpl_stats
145 | Opt_D_dump_tc_trace
146 | Opt_D_dump_if_trace
152 | Opt_D_verbose_core2core
153 | Opt_D_verbose_stg2stg
155 | Opt_D_dump_hi_diffs
156 | Opt_D_dump_minimal_imports
157 | Opt_D_dump_mod_cycles
158 | Opt_D_dump_view_pattern_commoning
159 | Opt_D_faststring_stats
160 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
166 | Opt_WarnIsError -- -Werror; makes warnings fatal
167 | Opt_WarnDuplicateExports
169 | Opt_WarnImplicitPrelude
170 | Opt_WarnIncompletePatterns
171 | Opt_WarnIncompletePatternsRecUpd
172 | Opt_WarnMissingFields
173 | Opt_WarnMissingMethods
174 | Opt_WarnMissingSigs
175 | Opt_WarnNameShadowing
176 | Opt_WarnOverlappingPatterns
177 | Opt_WarnSimplePatterns
178 | Opt_WarnTypeDefaults
179 | Opt_WarnMonomorphism
180 | Opt_WarnUnusedBinds
181 | Opt_WarnUnusedImports
182 | Opt_WarnUnusedMatches
183 | Opt_WarnDeprecations
184 | Opt_WarnDodgyImports
189 | Opt_OverlappingInstances
190 | Opt_UndecidableInstances
191 | Opt_IncoherentInstances
192 | Opt_MonomorphismRestriction
194 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
195 | Opt_ForeignFunctionInterface
196 | Opt_UnliftedFFITypes
197 | Opt_PArr -- Syntactic support for parallel arrays
198 | Opt_Arrows -- Arrow-notation syntax
199 | Opt_TemplateHaskell
202 | Opt_ImplicitPrelude
203 | Opt_ScopedTypeVariables
207 | Opt_OverloadedStrings
208 | Opt_DisambiguateRecordFields
209 | Opt_RecordWildCards
214 | Opt_StandaloneDeriving
215 | Opt_DeriveDataTypeable
216 | Opt_TypeSynonymInstances
217 | Opt_FlexibleContexts
218 | Opt_FlexibleInstances
219 | Opt_ConstrainedClassMethods
220 | Opt_MultiParamTypeClasses
221 | Opt_FunctionalDependencies
223 | Opt_PolymorphicComponents
224 | Opt_ExistentialQuantification
228 | Opt_PatternSignatures
229 | Opt_ParallelListComp
230 | Opt_TransformListComp
231 | Opt_GeneralizedNewtypeDeriving
234 | Opt_LiberalTypeSynonyms
237 | Opt_ImpredicativeTypes
240 | Opt_PrintExplicitForalls
248 | Opt_IgnoreInterfacePragmas
249 | Opt_OmitInterfacePragmas
250 | Opt_DoLambdaEtaExpansion
254 | Opt_UnboxStrictFields
258 | Opt_RegsGraph -- do graph coloring register allocation
259 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
267 | Opt_ExcessPrecision
268 | Opt_ReadUserPackageConf
272 | Opt_HideAllPackages
273 | Opt_PrintBindResult
277 | Opt_BreakOnException
279 | Opt_PrintEvldWithShow
280 | Opt_PrintBindContents
284 | Opt_ConvertToZipCfgAndBack
295 data DynFlags = DynFlags {
298 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
299 stgToDo :: Maybe [StgToDo], -- similarly
300 hscTarget :: HscTarget,
301 hscOutName :: String, -- name of the output file
302 extCoreName :: String, -- name of the .core output file
303 verbosity :: Int, -- verbosity level
304 optLevel :: Int, -- optimisation level
305 simplPhases :: Int, -- number of simplifier phases
306 maxSimplIterations :: Int, -- max simplifier iterations
307 ruleCheck :: Maybe String,
309 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
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
448 isNoLink other = False
451 = ExposePackage String
453 | IgnorePackage String
456 defaultHscTarget = defaultObjectTarget
458 -- | the 'HscTarget' value corresponding to the default way to create
459 -- object files on the current platform.
461 | cGhcWithNativeCodeGen == "YES" = HscAsm
466 | Wrapped (Maybe String)
470 initDynFlags dflags = do
471 -- someday these will be dynamic flags
472 ways <- readIORef v_Ways
473 build_tag <- readIORef v_Build_tag
474 rts_build_tag <- readIORef v_RTS_Build_tag
477 buildTag = build_tag,
478 rtsBuildTag = rts_build_tag
483 ghcMode = CompManager,
484 ghcLink = LinkBinary,
487 hscTarget = defaultHscTarget,
493 maxSimplIterations = 4,
495 specConstrThreshold = Just 200,
496 liberateCaseThreshold = Just 200,
498 cmdlineHcIncludes = [],
502 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
504 thisPackage = mainPackageId,
510 objectSuf = phaseInputExt StopLn,
511 hcSuf = phaseInputExt HCc,
514 outputFile = Nothing,
516 dynLibLoader = Deployable,
517 dumpPrefix = Nothing,
518 dumpPrefixForce = Nothing,
522 cmdlineFrameworks = [],
523 tmpDir = cDEFAULT_TMPDIR,
541 pkgDatabase = Nothing,
542 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
543 haddockOptions = Nothing,
545 Opt_ReadUserPackageConf,
547 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
548 -- behaviour the default, to see if anyone notices
552 Opt_MonomorphismRestriction,
558 Opt_PrintBindContents
560 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
561 -- The default -O0 options
564 log_action = \severity srcSpan style msg ->
566 SevInfo -> hPutStrLn stderr (show (msg style))
567 SevFatal -> hPutStrLn stderr (show (msg style))
568 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
574 0 | print errors & warnings only
575 1 | minimal verbosity: print "compiling M ... done." for each module.
576 2 | equivalent to -dshow-passes
577 3 | equivalent to existing "ghc -v"
578 4 | "ghc -v -ddump-most"
579 5 | "ghc -v -ddump-all"
582 dopt :: DynFlag -> DynFlags -> Bool
583 dopt f dflags = f `elem` (flags dflags)
585 dopt_set :: DynFlags -> DynFlag -> DynFlags
586 dopt_set dfs f = dfs{ flags = f : flags dfs }
588 dopt_unset :: DynFlags -> DynFlag -> DynFlags
589 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
591 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
592 getOpts dflags opts = reverse (opts dflags)
593 -- We add to the options from the front, so we need to reverse the list
595 getVerbFlag :: DynFlags -> String
597 | verbosity dflags >= 3 = "-v"
600 setObjectDir f d = d{ objectDir = Just f}
601 setHiDir f d = d{ hiDir = Just f}
602 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
603 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
604 -- #included from the .hc file when compiling with -fvia-C.
606 setObjectSuf f d = d{ objectSuf = f}
607 setHiSuf f d = d{ hiSuf = f}
608 setHcSuf f d = d{ hcSuf = f}
610 setOutputFile f d = d{ outputFile = f}
611 setOutputHi f d = d{ outputHi = f}
613 parseDynLibLoaderMode f d =
615 ("deploy", "") -> d{ dynLibLoader = Deployable }
616 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
617 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
618 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
619 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
620 (_,_) -> error "Unknown dynlib loader"
622 setDumpPrefixForce f d = d { dumpPrefixForce = f}
624 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
625 -- Config.hs should really use Option.
626 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
628 setPgmL f d = d{ pgm_L = f}
629 setPgmF f d = d{ pgm_F = f}
630 setPgmc f d = d{ pgm_c = (f,[])}
631 setPgmm f d = d{ pgm_m = (f,[])}
632 setPgms f d = d{ pgm_s = (f,[])}
633 setPgma f d = d{ pgm_a = (f,[])}
634 setPgml f d = d{ pgm_l = (f,[])}
635 setPgmdll f d = d{ pgm_dll = (f,[])}
636 setPgmwindres f d = d{ pgm_windres = f}
638 addOptL f d = d{ opt_L = f : opt_L d}
639 addOptP f d = d{ opt_P = f : opt_P d}
640 addOptF f d = d{ opt_F = f : opt_F d}
641 addOptc f d = d{ opt_c = f : opt_c d}
642 addOptm f d = d{ opt_m = f : opt_m d}
643 addOpta f d = d{ opt_a = f : opt_a d}
644 addOptl f d = d{ opt_l = f : opt_l d}
645 addOptdep f d = d{ opt_dep = f : opt_dep d}
646 addOptwindres f d = d{ opt_windres = f : opt_windres d}
648 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
650 addHaddockOpts f d = d{ haddockOptions = Just f}
652 -- -----------------------------------------------------------------------------
653 -- Command-line options
655 -- When invoking external tools as part of the compilation pipeline, we
656 -- pass these a sequence of options on the command-line. Rather than
657 -- just using a list of Strings, we use a type that allows us to distinguish
658 -- between filepaths and 'other stuff'. [The reason being, of course, that
659 -- this type gives us a handle on transforming filenames, and filenames only,
660 -- to whatever format they're expected to be on a particular platform.]
663 = FileOption -- an entry that _contains_ filename(s) / filepaths.
664 String -- a non-filepath prefix that shouldn't be
665 -- transformed (e.g., "/out=")
666 String -- the filepath/filename portion
669 -----------------------------------------------------------------------------
670 -- Setting the optimisation level
672 updOptLevel :: Int -> DynFlags -> DynFlags
673 -- Set dynflags appropriate to the optimisation level
675 = dfs2{ optLevel = final_n }
677 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
678 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
679 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
681 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
682 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
684 optLevelFlags :: [([Int], DynFlag)]
686 = [ ([0], Opt_IgnoreInterfacePragmas)
687 , ([0], Opt_OmitInterfacePragmas)
689 , ([1,2], Opt_IgnoreAsserts)
690 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
692 , ([1,2], Opt_DoEtaReduction)
693 , ([1,2], Opt_CaseMerge)
694 , ([1,2], Opt_Strictness)
696 , ([1,2], Opt_FullLaziness)
698 , ([2], Opt_LiberateCase)
699 , ([2], Opt_SpecConstr)
701 , ([0,1,2], Opt_DoLambdaEtaExpansion)
702 -- This one is important for a tiresome reason:
703 -- we want to make sure that the bindings for data
704 -- constructors are eta-expanded. This is probably
705 -- a good thing anyway, but it seems fragile.
708 -- -----------------------------------------------------------------------------
709 -- Standard sets of warning options
712 = [ Opt_WarnDeprecations,
713 Opt_WarnOverlappingPatterns,
714 Opt_WarnMissingFields,
715 Opt_WarnMissingMethods,
716 Opt_WarnDuplicateExports
720 = standardWarnings ++
721 [ Opt_WarnUnusedBinds,
722 Opt_WarnUnusedMatches,
723 Opt_WarnUnusedImports,
724 Opt_WarnIncompletePatterns,
730 [ Opt_WarnTypeDefaults,
731 Opt_WarnNameShadowing,
737 -- minuswRemovesOpts should be every warning option
740 [Opt_WarnImplicitPrelude,
741 Opt_WarnIncompletePatternsRecUpd,
742 Opt_WarnSimplePatterns,
743 Opt_WarnMonomorphism,
747 -- -----------------------------------------------------------------------------
748 -- CoreToDo: abstraction of core-to-core passes to run.
750 data CoreToDo -- These are diff core-to-core passes,
751 -- which may be invoked in any order,
752 -- as many times as you like.
754 = CoreDoSimplify -- The core-to-core simplifier.
757 -- Each run of the simplifier can take a different
758 -- set of simplifier-specific flags.
760 | CoreDoFloatOutwards FloatOutSwitches
765 | CoreDoWorkerWrapper
768 | CoreDoOldStrictness
771 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
772 -- matching this string
773 | CoreDoVectorisation
774 | CoreDoNothing -- Useful when building up
775 | CoreDoPasses [CoreToDo] -- lists of these things
777 data SimplifierMode -- See comments in SimplMonad
781 data SimplifierSwitch
782 = MaxSimplifierIterations Int
785 data FloatOutSwitches
786 = FloatOutSw Bool -- True <=> float lambdas to top level
787 Bool -- True <=> float constants to top level,
788 -- even if they do not escape a lambda
791 -- The core-to-core pass ordering is derived from the DynFlags:
792 runWhen :: Bool -> CoreToDo -> CoreToDo
793 runWhen True do_this = do_this
794 runWhen False do_this = CoreDoNothing
796 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
797 runMaybe (Just x) f = f x
798 runMaybe Nothing _ = CoreDoNothing
800 getCoreToDo :: DynFlags -> [CoreToDo]
802 | Just todo <- coreToDo dflags = todo -- set explicitly by user
803 | otherwise = core_todo
805 opt_level = optLevel dflags
806 phases = simplPhases dflags
807 max_iter = maxSimplIterations dflags
808 strictness = dopt Opt_Strictness dflags
809 full_laziness = dopt Opt_FullLaziness dflags
810 cse = dopt Opt_CSE dflags
811 spec_constr = dopt Opt_SpecConstr dflags
812 liberate_case = dopt Opt_LiberateCase dflags
813 rule_check = ruleCheck dflags
814 vectorisation = dopt Opt_Vectorise dflags
816 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
818 simpl_phase phase iter = CoreDoPasses
819 [ CoreDoSimplify (SimplPhase phase) [
820 MaxSimplifierIterations iter
822 maybe_rule_check phase
825 -- By default, we have 2 phases before phase 0.
827 -- Want to run with inline phase 2 after the specialiser to give
828 -- maximum chance for fusion to work before we inline build/augment
829 -- in phase 1. This made a difference in 'ansi' where an
830 -- overloaded function wasn't inlined till too late.
832 -- Need phase 1 so that build/augment get
833 -- inlined. I found that spectral/hartel/genfft lost some useful
834 -- strictness in the function sumcode' if augment is not inlined
835 -- before strictness analysis runs
836 simpl_phases = CoreDoPasses [ simpl_phase phase max_iter
837 | phase <- [phases, phases-1 .. 1] ]
840 -- initial simplify: mk specialiser happy: minimum effort please
841 simpl_gently = CoreDoSimplify SimplGently [
843 -- Don't inline anything till full laziness has bitten
844 -- In particular, inlining wrappers inhibits floating
845 -- e.g. ...(case f x of ...)...
846 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
847 -- ==> ...(case x of I# x# -> case fw x# of ...)...
848 -- and now the redex (f x) isn't floatable any more
849 -- Similarly, don't apply any rules until after full
850 -- laziness. Notably, list fusion can prevent floating.
852 NoCaseOfCase, -- Don't do case-of-case transformations.
853 -- This makes full laziness work better
854 MaxSimplifierIterations max_iter
858 if opt_level == 0 then
859 [simpl_phase 0 max_iter]
860 else {- opt_level >= 1 -} [
862 -- initial simplify: mk specialiser happy: minimum effort please
865 -- We run vectorisation here for now, but we might also try to run
867 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
869 -- Specialisation is best done before full laziness
870 -- so that overloaded functions have all their dictionary lambdas manifest
873 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
879 -- Phase 0: allow all Ids to be inlined now
880 -- This gets foldr inlined before strictness analysis
882 -- At least 3 iterations because otherwise we land up with
883 -- huge dead expressions because of an infelicity in the
885 -- let k = BIG in foldr k z xs
886 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
887 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
889 simpl_phase 0 (max max_iter 3),
892 #ifdef OLD_STRICTNESS
895 runWhen strictness (CoreDoPasses [
899 simpl_phase 0 max_iter
902 runWhen full_laziness
903 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
904 True)), -- Float constants
905 -- nofib/spectral/hartel/wang doubles in speed if you
906 -- do full laziness late in the day. It only happens
907 -- after fusion and other stuff, so the early pass doesn't
908 -- catch it. For the record, the redex is
909 -- f_el22 (f_el21 r_midblock)
913 -- We want CSE to follow the final full-laziness pass, because it may
914 -- succeed in commoning up things floated out by full laziness.
915 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
921 -- Case-liberation for -O2. This should be after
922 -- strictness analysis and the simplification which follows it.
923 runWhen liberate_case (CoreDoPasses [
925 simpl_phase 0 max_iter
926 ]), -- Run the simplifier after LiberateCase to vastly
927 -- reduce the possiblility of shadowing
928 -- Reason: see Note [Shadowing] in SpecConstr.lhs
930 runWhen spec_constr CoreDoSpecConstr,
934 -- Final clean-up simplification:
935 simpl_phase 0 max_iter
938 -- -----------------------------------------------------------------------------
939 -- StgToDo: abstraction of stg-to-stg passes to run.
942 = StgDoMassageForProfiling -- should be (next to) last
943 -- There's also setStgVarInfo, but its absolute "lastness"
944 -- is so critical that it is hardwired in (no flag).
947 getStgToDo :: DynFlags -> [StgToDo]
949 | Just todo <- stgToDo dflags = todo -- set explicitly by user
952 stg_stats = dopt Opt_StgStats dflags
954 todo1 = if stg_stats then [D_stg_stats] else []
956 todo2 | WayProf `elem` wayNames dflags
957 = StgDoMassageForProfiling : todo1
961 -- -----------------------------------------------------------------------------
965 allFlags = map ('-':) $
966 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
967 map ("fno-"++) flags ++
971 where ok (PrefixPred _ _) = False
973 flags = map fst fFlags
976 dynamic_flags :: [(String, OptKind DynP)]
978 ( "n" , NoArg (setDynFlag Opt_DryRun) )
979 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
980 , ( "F" , NoArg (setDynFlag Opt_Pp))
981 , ( "#include" , HasArg (addCmdlineHCInclude) )
982 , ( "v" , OptIntSuffix setVerbosity )
984 ------- Specific phases --------------------------------------------
985 , ( "pgmL" , HasArg (upd . setPgmL) )
986 , ( "pgmP" , HasArg (upd . setPgmP) )
987 , ( "pgmF" , HasArg (upd . setPgmF) )
988 , ( "pgmc" , HasArg (upd . setPgmc) )
989 , ( "pgmm" , HasArg (upd . setPgmm) )
990 , ( "pgms" , HasArg (upd . setPgms) )
991 , ( "pgma" , HasArg (upd . setPgma) )
992 , ( "pgml" , HasArg (upd . setPgml) )
993 , ( "pgmdll" , HasArg (upd . setPgmdll) )
994 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
996 , ( "optL" , HasArg (upd . addOptL) )
997 , ( "optP" , HasArg (upd . addOptP) )
998 , ( "optF" , HasArg (upd . addOptF) )
999 , ( "optc" , HasArg (upd . addOptc) )
1000 , ( "optm" , HasArg (upd . addOptm) )
1001 , ( "opta" , HasArg (upd . addOpta) )
1002 , ( "optl" , HasArg (upd . addOptl) )
1003 , ( "optdep" , HasArg (upd . addOptdep) )
1004 , ( "optwindres" , HasArg (upd . addOptwindres) )
1006 , ( "split-objs" , NoArg (if can_split
1007 then setDynFlag Opt_SplitObjs
1010 -------- Linking ----------------------------------------------------
1011 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1012 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1013 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1014 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1016 ------- Libraries ---------------------------------------------------
1017 , ( "L" , Prefix addLibraryPath )
1018 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1020 ------- Frameworks --------------------------------------------------
1021 -- -framework-path should really be -F ...
1022 , ( "framework-path" , HasArg addFrameworkPath )
1023 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1025 ------- Output Redirection ------------------------------------------
1026 , ( "odir" , HasArg (upd . setObjectDir))
1027 , ( "o" , SepArg (upd . setOutputFile . Just))
1028 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1029 , ( "osuf" , HasArg (upd . setObjectSuf))
1030 , ( "hcsuf" , HasArg (upd . setHcSuf))
1031 , ( "hisuf" , HasArg (upd . setHiSuf))
1032 , ( "hidir" , HasArg (upd . setHiDir))
1033 , ( "tmpdir" , HasArg (upd . setTmpDir))
1034 , ( "stubdir" , HasArg (upd . setStubDir))
1035 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1037 ------- Keeping temporary files -------------------------------------
1038 -- These can be singular (think ghc -c) or plural (think ghc --make)
1039 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1040 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1041 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1042 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1043 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1044 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1045 -- This only makes sense as plural
1046 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1048 ------- Miscellaneous ----------------------------------------------
1049 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1050 , ( "main-is" , SepArg setMainIs )
1051 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1052 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1053 , ( "hpcdir" , SepArg setOptHpcDir )
1055 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1056 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1057 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1059 ------- Packages ----------------------------------------------------
1060 , ( "package-conf" , HasArg extraPkgConf_ )
1061 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1062 , ( "package-name" , HasArg (upd . setPackageName) )
1063 , ( "package" , HasArg exposePackage )
1064 , ( "hide-package" , HasArg hidePackage )
1065 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1066 , ( "ignore-package" , HasArg ignorePackage )
1067 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1069 ------ HsCpp opts ---------------------------------------------------
1070 , ( "D", AnySuffix (upd . addOptP) )
1071 , ( "U", AnySuffix (upd . addOptP) )
1073 ------- Include/Import Paths ----------------------------------------
1074 , ( "I" , Prefix addIncludePath)
1075 , ( "i" , OptPrefix addImportPath )
1077 ------ Debugging ----------------------------------------------------
1078 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1080 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1081 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1082 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1083 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1084 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1085 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1086 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1087 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1088 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1089 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1090 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1091 , ( "ddump-asm-regalloc-stages",
1092 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1093 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1094 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1095 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1096 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1097 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1098 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1099 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1100 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1101 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1102 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1103 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1104 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1105 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1106 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1107 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1108 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1109 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1110 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1111 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1112 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1113 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1114 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1115 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1116 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1117 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1118 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1119 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1120 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1121 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1122 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1123 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1124 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1125 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1126 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1127 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1128 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1129 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1130 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1131 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1132 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1133 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1134 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1135 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1136 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1137 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1138 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1139 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1140 setVerbosity (Just 2)) )
1141 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1143 ------ Machine dependant (-m<blah>) stuff ---------------------------
1145 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1146 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1147 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1149 ------ Warning opts -------------------------------------------------
1150 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1151 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1152 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1153 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1154 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1155 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1157 ------ Optimisation flags ------------------------------------------
1158 , ( "O" , NoArg (upd (setOptLevel 1)))
1159 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1160 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1161 -- If the number is missing, use 1
1163 , ( "fsimplifier-phases", IntSuffix (\n ->
1164 upd (\dfs -> dfs{ simplPhases = n })) )
1165 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1166 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1168 , ( "fspec-constr-threshold", IntSuffix (\n ->
1169 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1170 , ( "fno-spec-constr-threshold", NoArg (
1171 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1172 , ( "fliberate-case-threshold", IntSuffix (\n ->
1173 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1174 , ( "fno-liberate-case-threshold", NoArg (
1175 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1177 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1178 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1180 ------ Compiler flags -----------------------------------------------
1182 , ( "fasm", NoArg (setObjTarget HscAsm) )
1183 , ( "fvia-c", NoArg (setObjTarget HscC) )
1184 , ( "fvia-C", NoArg (setObjTarget HscC) )
1186 , ( "fno-code", NoArg (setTarget HscNothing))
1187 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1188 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1190 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1191 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1193 -- the rest of the -f* and -fno-* flags
1194 , ( "f", PrefixPred (isFlag fFlags)
1195 (\f -> setDynFlag (getFlag fFlags f)) )
1196 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1197 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1199 -- the -X* and -XNo* flags
1200 , ( "X", PrefixPred (isFlag xFlags)
1201 (\f -> setDynFlag (getFlag xFlags f)) )
1202 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1203 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1206 -- these -f<blah> flags can all be reversed with -fno-<blah>
1209 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1210 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1211 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1212 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1213 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1214 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1215 ( "warn-missing-fields", Opt_WarnMissingFields ),
1216 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1217 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1218 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1219 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1220 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1221 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1222 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1223 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1224 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1225 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1226 ( "warn-deprecations", Opt_WarnDeprecations ),
1227 ( "warn-orphans", Opt_WarnOrphans ),
1228 ( "warn-tabs", Opt_WarnTabs ),
1229 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1230 ( "strictness", Opt_Strictness ),
1231 ( "full-laziness", Opt_FullLaziness ),
1232 ( "liberate-case", Opt_LiberateCase ),
1233 ( "spec-constr", Opt_SpecConstr ),
1235 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1236 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1237 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1238 ( "ignore-asserts", Opt_IgnoreAsserts ),
1239 ( "do-eta-reduction", Opt_DoEtaReduction ),
1240 ( "case-merge", Opt_CaseMerge ),
1241 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1242 ( "dicts-cheap", Opt_DictsCheap ),
1243 ( "excess-precision", Opt_ExcessPrecision ),
1244 ( "asm-mangling", Opt_DoAsmMangling ),
1245 ( "print-bind-result", Opt_PrintBindResult ),
1246 ( "force-recomp", Opt_ForceRecomp ),
1247 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1248 ( "rewrite-rules", Opt_RewriteRules ),
1249 ( "break-on-exception", Opt_BreakOnException ),
1250 ( "break-on-error", Opt_BreakOnError ),
1251 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1252 ( "print-bind-contents", Opt_PrintBindContents ),
1253 ( "run-cps", Opt_RunCPSZ ),
1254 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1255 ( "vectorise", Opt_Vectorise ),
1256 ( "regs-graph", Opt_RegsGraph),
1257 ( "regs-iterative", Opt_RegsIterative),
1258 -- Deprecated in favour of -XTemplateHaskell:
1259 ( "th", Opt_TemplateHaskell ),
1260 -- Deprecated in favour of -XForeignFunctionInterface:
1261 ( "fi", Opt_ForeignFunctionInterface ),
1262 -- Deprecated in favour of -XForeignFunctionInterface:
1263 ( "ffi", Opt_ForeignFunctionInterface ),
1264 -- Deprecated in favour of -XArrows:
1265 ( "arrows", Opt_Arrows ),
1266 -- Deprecated in favour of -XGenerics:
1267 ( "generics", Opt_Generics ),
1268 -- Deprecated in favour of -XImplicitPrelude:
1269 ( "implicit-prelude", Opt_ImplicitPrelude ),
1270 -- Deprecated in favour of -XBangPatterns:
1271 ( "bang-patterns", Opt_BangPatterns ),
1272 -- Deprecated in favour of -XMonomorphismRestriction:
1273 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1274 -- Deprecated in favour of -XMonoPatBinds:
1275 ( "mono-pat-binds", Opt_MonoPatBinds ),
1276 -- Deprecated in favour of -XExtendedDefaultRules:
1277 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1278 -- Deprecated in favour of -XImplicitParams:
1279 ( "implicit-params", Opt_ImplicitParams ),
1280 -- Deprecated in favour of -XScopedTypeVariables:
1281 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1282 -- Deprecated in favour of -XPArr:
1283 ( "parr", Opt_PArr ),
1284 -- Deprecated in favour of -XOverlappingInstances:
1285 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1286 -- Deprecated in favour of -XUndecidableInstances:
1287 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1288 -- Deprecated in favour of -XIncoherentInstances:
1289 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1290 ( "gen-manifest", Opt_GenManifest ),
1291 ( "embed-manifest", Opt_EmbedManifest )
1294 supportedLanguages :: [String]
1295 supportedLanguages = map fst xFlags
1297 -- These -X<blah> flags can all be reversed with -XNo<blah>
1298 xFlags :: [(String, DynFlag)]
1301 ( "PatternGuards", Opt_PatternGuards ),
1302 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1303 ( "MagicHash", Opt_MagicHash ),
1304 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1305 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1306 ( "KindSignatures", Opt_KindSignatures ),
1307 ( "PatternSignatures", Opt_PatternSignatures ),
1308 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1309 ( "ParallelListComp", Opt_ParallelListComp ),
1310 ( "TransformListComp", Opt_TransformListComp ),
1311 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1312 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1313 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1314 ( "Rank2Types", Opt_Rank2Types ),
1315 ( "RankNTypes", Opt_RankNTypes ),
1316 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1317 ( "TypeOperators", Opt_TypeOperators ),
1318 ( "RecursiveDo", Opt_RecursiveDo ),
1319 ( "Arrows", Opt_Arrows ),
1320 ( "PArr", Opt_PArr ),
1321 ( "TemplateHaskell", Opt_TemplateHaskell ),
1322 ( "Generics", Opt_Generics ),
1324 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1325 ( "RecordWildCards", Opt_RecordWildCards ),
1326 ( "RecordPuns", Opt_RecordPuns ),
1327 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1328 ( "OverloadedStrings", Opt_OverloadedStrings ),
1329 ( "GADTs", Opt_GADTs ),
1330 ( "ViewPatterns", Opt_ViewPatterns),
1331 ( "TypeFamilies", Opt_TypeFamilies ),
1332 ( "BangPatterns", Opt_BangPatterns ),
1334 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1335 -- On by default (which is not strictly H98):
1336 ( "MonoPatBinds", Opt_MonoPatBinds ),
1337 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1338 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1339 ( "ImplicitParams", Opt_ImplicitParams ),
1340 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1341 ( "UnboxedTuples", Opt_UnboxedTuples ),
1342 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1343 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1344 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1345 ( "FlexibleContexts", Opt_FlexibleContexts ),
1346 ( "FlexibleInstances", Opt_FlexibleInstances ),
1347 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1348 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1349 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1350 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1351 ( "OverlappingInstances", Opt_OverlappingInstances ),
1352 ( "UndecidableInstances", Opt_UndecidableInstances ),
1353 ( "IncoherentInstances", Opt_IncoherentInstances )
1356 impliedFlags :: [(DynFlag, [DynFlag])]
1358 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1359 -- be completely rigid for GADTs
1360 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1361 -- Note [Scoped tyvars] in TcBinds
1364 glasgowExtsFlags = [
1365 Opt_PrintExplicitForalls
1366 , Opt_ForeignFunctionInterface
1367 , Opt_UnliftedFFITypes
1369 , Opt_ImplicitParams
1370 , Opt_ScopedTypeVariables
1372 , Opt_TypeSynonymInstances
1373 , Opt_StandaloneDeriving
1374 , Opt_DeriveDataTypeable
1375 , Opt_FlexibleContexts
1376 , Opt_FlexibleInstances
1377 , Opt_ConstrainedClassMethods
1378 , Opt_MultiParamTypeClasses
1379 , Opt_FunctionalDependencies
1381 , Opt_PolymorphicComponents
1382 , Opt_ExistentialQuantification
1385 , Opt_LiberalTypeSynonyms
1387 , Opt_ImpredicativeTypes
1390 , Opt_ParallelListComp
1391 , Opt_EmptyDataDecls
1392 , Opt_KindSignatures
1393 , Opt_PatternSignatures
1394 , Opt_GeneralizedNewtypeDeriving
1395 , Opt_TypeFamilies ]
1398 isFlag :: [(String,a)] -> String -> Bool
1399 isFlag flags f = any (\(ff,_) -> ff == f) flags
1401 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1402 isPrefFlag pref flags no_f
1403 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1407 getFlag :: [(String,a)] -> String -> a
1408 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1410 [] -> panic ("get_flag " ++ f)
1412 getPrefFlag :: String -> [(String,a)] -> String -> a
1413 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1414 -- We should only be passed flags which match the prefix
1416 -- -----------------------------------------------------------------------------
1417 -- Parsing the dynamic flags.
1419 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1420 parseDynamicFlags dflags args = do
1421 let ((leftover,errs),dflags')
1422 = runCmdLine (processArgs dynamic_flags args) dflags
1423 when (not (null errs)) $ do
1424 throwDyn (UsageError (unlines errs))
1425 return (dflags', leftover)
1428 type DynP = CmdLineP DynFlags
1430 upd :: (DynFlags -> DynFlags) -> DynP ()
1432 dfs <- getCmdLineState
1433 putCmdLineState $! (f dfs)
1435 --------------------------
1436 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1437 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1439 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1440 -- When you set f, set the ones it implies
1441 -- When you un-set f, however, we don't un-set the things it implies
1442 -- (except for -fno-glasgow-exts, which is treated specially)
1444 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1446 --------------------------
1447 setDumpFlag :: DynFlag -> OptKind DynP
1448 setDumpFlag dump_flag
1449 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1450 -- Whenver we -ddump, switch off the recompilation checker,
1451 -- else you don't see the dump!
1453 setVerbosity :: Maybe Int -> DynP ()
1454 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1456 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1458 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1461 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1463 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1465 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1468 | Nothing <- unpackPackageId pid
1469 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1471 = \s -> s{ thisPackage = pid }
1473 pid = stringToPackageId p
1475 -- If we're linking a binary, then only targets that produce object
1476 -- code are allowed (requests for other target types are ignored).
1477 setTarget l = upd set
1480 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1483 -- Changes the target only if we're compiling object code. This is
1484 -- used by -fasm and -fvia-C, which switch from one to the other, but
1485 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1486 -- can be safely used in an OPTIONS_GHC pragma.
1487 setObjTarget l = upd set
1490 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1493 setOptLevel :: Int -> DynFlags -> DynFlags
1494 setOptLevel n dflags
1495 | hscTarget dflags == HscInterpreted && n > 0
1497 -- not in IO any more, oh well:
1498 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1500 = updOptLevel n dflags
1503 setMainIs :: String -> DynP ()
1505 | not (null main_fn) && isLower (head main_fn)
1506 -- The arg looked like "Foo.Bar.baz"
1507 = upd $ \d -> d{ mainFunIs = Just main_fn,
1508 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1510 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1511 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1513 | otherwise -- The arg looked like "baz"
1514 = upd $ \d -> d{ mainFunIs = Just arg }
1516 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1518 -----------------------------------------------------------------------------
1519 -- Paths & Libraries
1521 -- -i on its own deletes the import paths
1522 addImportPath "" = upd (\s -> s{importPaths = []})
1523 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1527 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1530 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1532 addFrameworkPath p =
1533 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1535 split_marker = ':' -- not configurable (ToDo)
1537 splitPathList :: String -> [String]
1538 splitPathList s = filter notNull (splitUp s)
1539 -- empty paths are ignored: there might be a trailing
1540 -- ':' in the initial list, for example. Empty paths can
1541 -- cause confusion when they are translated into -I options
1542 -- for passing to gcc.
1544 #ifndef mingw32_TARGET_OS
1545 splitUp xs = split split_marker xs
1547 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1549 -- That is, if "foo:bar:baz" is used, this interpreted as
1550 -- consisting of three entries, 'foo', 'bar', 'baz'.
1551 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1552 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1554 -- Notice that no attempt is made to fully replace the 'standard'
1555 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1556 -- that this will cause too much breakage for users & ':' will
1557 -- work fine even with DOS paths, if you're not insisting on being silly.
1560 splitUp (x:':':div:xs) | div `elem` dir_markers
1561 = ((x:':':div:p): splitUp rs)
1563 (p,rs) = findNextPath xs
1564 -- we used to check for existence of the path here, but that
1565 -- required the IO monad to be threaded through the command-line
1566 -- parser which is quite inconvenient. The
1567 splitUp xs = cons p (splitUp rs)
1569 (p,rs) = findNextPath xs
1574 -- will be called either when we've consumed nought or the
1575 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1576 -- finding the next split marker.
1578 case break (`elem` split_markers) xs of
1579 (p, d:ds) -> (p, ds)
1582 split_markers :: [Char]
1583 split_markers = [':', ';']
1585 dir_markers :: [Char]
1586 dir_markers = ['/', '\\']
1589 -- -----------------------------------------------------------------------------
1590 -- tmpDir, where we store temporary files.
1592 setTmpDir :: FilePath -> DynFlags -> DynFlags
1593 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1595 #if !defined(mingw32_HOST_OS)
1596 canonicalise p = normalise p
1598 -- Canonicalisation of temp path under win32 is a bit more
1599 -- involved: (a) strip trailing slash,
1600 -- (b) normalise slashes
1601 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1602 canonicalise path = removeTrailingSlash $ normalise $ xltCygdrive path
1604 -- if we're operating under cygwin, and TMP/TEMP is of
1605 -- the form "/cygdrive/drive/path", translate this to
1606 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1607 -- understand /cygdrive paths.)
1608 cygdrivePrefix = [pathSeparator] ++ "/cygdrive/" ++ [pathSeparator]
1609 xltCygdrive path = case maybePrefixMatch cygdrivePrefix path of
1611 | isPathSeparator sep -> drive:':':pathSeparator:xs
1614 -- strip the trailing backslash (awful, but we only do this once).
1615 removeTrailingSlash path
1616 | isPathSeparator (last path) = init path
1620 -----------------------------------------------------------------------------
1623 setOptHpcDir :: String -> DynP ()
1624 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1626 -----------------------------------------------------------------------------
1627 -- Via-C compilation stuff
1629 -- There are some options that we need to pass to gcc when compiling
1630 -- Haskell code via C, but are only supported by recent versions of
1631 -- gcc. The configure script decides which of these options we need,
1632 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1633 -- read before each via-C compilation. The advantage of having these
1634 -- in a separate file is that the file can be created at install-time
1635 -- depending on the available gcc version, and even re-generated later
1636 -- if gcc is upgraded.
1638 -- The options below are not dependent on the version of gcc, only the
1641 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1642 [String]) -- for registerised HC compilations
1643 machdepCCOpts dflags
1644 #if alpha_TARGET_ARCH
1646 #ifdef HAVE_THREADED_RTS_SUPPORT
1650 -- For now, to suppress the gcc warning "call-clobbered
1651 -- register used for global register variable", we simply
1652 -- disable all warnings altogether using the -w flag. Oh well.
1654 #elif hppa_TARGET_ARCH
1655 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1656 -- (very nice, but too bad the HP /usr/include files don't agree.)
1657 = ( ["-D_HPUX_SOURCE"], [] )
1659 #elif m68k_TARGET_ARCH
1660 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1661 -- popping of args to routines to be explicit; if we let things
1662 -- be deferred 'til after an STGJUMP, imminent death is certain!
1664 -- -fomit-frame-pointer : *don't*
1665 -- It's better to have a6 completely tied up being a frame pointer
1666 -- rather than let GCC pick random things to do with it.
1667 -- (If we want to steal a6, then we would try to do things
1668 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1669 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1671 #elif i386_TARGET_ARCH
1672 -- -fno-defer-pop : basically the same game as for m68k
1674 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1675 -- the fp (%ebp) for our register maps.
1676 = let n_regs = stolen_x86_regs dflags
1679 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1680 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1683 "-fomit-frame-pointer",
1684 -- we want -fno-builtin, because when gcc inlines
1685 -- built-in functions like memcpy() it tends to
1686 -- run out of registers, requiring -monly-n-regs
1688 "-DSTOLEN_X86_REGS="++show n_regs ]
1691 #elif ia64_TARGET_ARCH
1692 = ( [], ["-fomit-frame-pointer", "-G0"] )
1694 #elif x86_64_TARGET_ARCH
1695 = ( [], ["-fomit-frame-pointer",
1696 "-fno-asynchronous-unwind-tables",
1697 -- the unwind tables are unnecessary for HC code,
1698 -- and get in the way of -split-objs. Another option
1699 -- would be to throw them away in the mangler, but this
1702 -- calling builtins like strlen() using the FFI can
1703 -- cause gcc to run out of regs, so use the external
1707 #elif sparc_TARGET_ARCH
1709 -- For now, to suppress the gcc warning "call-clobbered
1710 -- register used for global register variable", we simply
1711 -- disable all warnings altogether using the -w flag. Oh well.
1713 #elif powerpc_apple_darwin_TARGET
1715 -- Disable Apple's precompiling preprocessor. It's a great thing
1716 -- for "normal" programs, but it doesn't support register variable
1718 = ( [], ["-no-cpp-precomp"] )
1723 picCCOpts :: DynFlags -> [String]
1725 #if darwin_TARGET_OS
1726 -- Apple prefers to do things the other way round.
1727 -- PIC is on by default.
1728 -- -mdynamic-no-pic:
1729 -- Turn off PIC code generation.
1731 -- Don't generate "common" symbols - these are unwanted
1732 -- in dynamic libraries.
1735 = ["-fno-common", "-D__PIC__"]
1737 = ["-mdynamic-no-pic"]
1738 #elif mingw32_TARGET_OS
1739 -- no -fPIC for Windows
1746 = ["-fPIC", "-D__PIC__"]
1751 -- -----------------------------------------------------------------------------
1755 can_split = cSplitObjs == "YES"
1757 -- -----------------------------------------------------------------------------
1760 compilerInfo :: [(String, String)]
1761 compilerInfo = [("Project name", cProjectName),
1762 ("Project version", cProjectVersion),
1763 ("Booter version", cBooterVersion),
1765 ("Interface file version", cHscIfaceFileVersion),
1766 ("Have interpreter", cGhcWithInterpreter),
1767 ("Object splitting", cSplitObjs),
1768 ("Have native code generator", cGhcWithNativeCodeGen),
1769 ("Support SMP", cGhcWithSMP),
1770 ("Unregisterised", cGhcUnregisterised),
1771 ("Tables next to code", cGhcEnableTablesNextToCode),
1772 ("Win32 DLLs", cEnableWin32DLLs),
1773 ("RTS ways", cGhcRTSWays),
1774 ("Leading underscore", cLeadingUnderscore)]