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 -- XXX This define is a bit of a hack, and should be done more nicely
64 #define FAST_STRING_NOT_NEEDED 1
65 #include "HsVersions.h"
69 import PrelNames ( mAIN )
70 #ifdef i386_TARGET_ARCH
71 import StaticFlags ( opt_Static )
73 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
75 import {-# SOURCE #-} Packages (PackageState)
76 import DriverPhases ( Phase(..), phaseInputExt )
79 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
80 import Panic ( panic, GhcException(..) )
81 import UniqFM ( UniqFM )
83 import Maybes ( orElse, fromJust )
84 import SrcLoc ( SrcSpan )
86 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
88 import Data.IORef ( readIORef )
89 import Control.Exception ( throwDyn )
90 import Control.Monad ( when )
93 import System.FilePath
94 import System.IO ( hPutStrLn, stderr )
96 -- -----------------------------------------------------------------------------
104 | Opt_D_dump_cmmz_pretty
108 | Opt_D_dump_asm_native
109 | Opt_D_dump_asm_liveness
110 | Opt_D_dump_asm_coalesce
111 | Opt_D_dump_asm_regalloc
112 | Opt_D_dump_asm_regalloc_stages
113 | Opt_D_dump_asm_conflicts
114 | Opt_D_dump_asm_stats
120 | Opt_D_dump_inlinings
121 | Opt_D_dump_rule_firings
122 | Opt_D_dump_occur_anal
126 | Opt_D_dump_simpl_iterations
127 | Opt_D_dump_simpl_phases
136 | Opt_D_dump_worker_wrapper
137 | Opt_D_dump_rn_trace
138 | Opt_D_dump_rn_stats
140 | Opt_D_dump_simpl_stats
141 | Opt_D_dump_tc_trace
142 | Opt_D_dump_if_trace
148 | Opt_D_verbose_core2core
149 | Opt_D_verbose_stg2stg
151 | Opt_D_dump_hi_diffs
152 | Opt_D_dump_minimal_imports
153 | Opt_D_dump_mod_cycles
154 | Opt_D_dump_view_pattern_commoning
155 | Opt_D_faststring_stats
156 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
162 | Opt_WarnIsError -- -Werror; makes warnings fatal
163 | Opt_WarnDuplicateExports
165 | Opt_WarnImplicitPrelude
166 | Opt_WarnIncompletePatterns
167 | Opt_WarnIncompletePatternsRecUpd
168 | Opt_WarnMissingFields
169 | Opt_WarnMissingMethods
170 | Opt_WarnMissingSigs
171 | Opt_WarnNameShadowing
172 | Opt_WarnOverlappingPatterns
173 | Opt_WarnSimplePatterns
174 | Opt_WarnTypeDefaults
175 | Opt_WarnMonomorphism
176 | Opt_WarnUnusedBinds
177 | Opt_WarnUnusedImports
178 | Opt_WarnUnusedMatches
179 | Opt_WarnDeprecations
180 | Opt_WarnDodgyImports
185 | Opt_OverlappingInstances
186 | Opt_UndecidableInstances
187 | Opt_IncoherentInstances
188 | Opt_MonomorphismRestriction
190 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
191 | Opt_ForeignFunctionInterface
192 | Opt_UnliftedFFITypes
193 | Opt_PArr -- Syntactic support for parallel arrays
194 | Opt_Arrows -- Arrow-notation syntax
195 | Opt_TemplateHaskell
199 | Opt_ImplicitPrelude
200 | Opt_ScopedTypeVariables
204 | Opt_OverloadedStrings
205 | Opt_DisambiguateRecordFields
206 | Opt_RecordWildCards
211 | Opt_StandaloneDeriving
212 | Opt_DeriveDataTypeable
213 | Opt_TypeSynonymInstances
214 | Opt_FlexibleContexts
215 | Opt_FlexibleInstances
216 | Opt_ConstrainedClassMethods
217 | Opt_MultiParamTypeClasses
218 | Opt_FunctionalDependencies
220 | Opt_PolymorphicComponents
221 | Opt_ExistentialQuantification
225 | Opt_PatternSignatures
226 | Opt_ParallelListComp
227 | Opt_TransformListComp
228 | Opt_GeneralizedNewtypeDeriving
231 | Opt_LiberalTypeSynonyms
234 | Opt_ImpredicativeTypes
237 | Opt_PrintExplicitForalls
245 | Opt_IgnoreInterfacePragmas
246 | Opt_OmitInterfacePragmas
247 | Opt_DoLambdaEtaExpansion
251 | Opt_UnboxStrictFields
255 | Opt_RegsGraph -- do graph coloring register allocation
256 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
264 | Opt_ExcessPrecision
265 | Opt_ReadUserPackageConf
269 | Opt_HideAllPackages
270 | Opt_PrintBindResult
274 | Opt_BreakOnException
276 | Opt_PrintEvldWithShow
277 | Opt_PrintBindContents
281 | Opt_ConvertToZipCfgAndBack
292 data DynFlags = DynFlags {
295 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
296 stgToDo :: Maybe [StgToDo], -- similarly
297 hscTarget :: HscTarget,
298 hscOutName :: String, -- name of the output file
299 extCoreName :: String, -- name of the .core output file
300 verbosity :: Int, -- verbosity level
301 optLevel :: Int, -- optimisation level
302 simplPhases :: Int, -- number of simplifier phases
303 maxSimplIterations :: Int, -- max simplifier iterations
304 ruleCheck :: Maybe String,
306 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
307 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
309 stolen_x86_regs :: Int,
310 cmdlineHcIncludes :: [String], -- -#includes
311 importPaths :: [FilePath],
313 mainFunIs :: Maybe String,
314 ctxtStkDepth :: Int, -- Typechecker context stack depth
316 thisPackage :: PackageId,
319 wayNames :: [WayName], -- way flags from the cmd line
320 buildTag :: String, -- the global "way" (eg. "p" for prof)
321 rtsBuildTag :: String, -- the RTS "way"
324 objectDir :: Maybe String,
325 hiDir :: Maybe String,
326 stubDir :: Maybe String,
332 outputFile :: Maybe String,
333 outputHi :: Maybe String,
334 dynLibLoader :: DynLibLoader,
336 -- | This is set by DriverPipeline.runPipeline based on where
337 -- its output is going.
338 dumpPrefix :: Maybe FilePath,
340 -- | Override the dumpPrefix set by runPipeline.
341 -- Set by -ddump-file-prefix
342 dumpPrefixForce :: Maybe FilePath,
344 includePaths :: [String],
345 libraryPaths :: [String],
346 frameworkPaths :: [String], -- used on darwin only
347 cmdlineFrameworks :: [String], -- ditto
348 tmpDir :: String, -- no trailing '/'
350 ghcUsagePath :: FilePath, -- Filled in by SysTools
351 ghciUsagePath :: FilePath, -- ditto
353 hpcDir :: String, -- ^ path to store the .mix files
355 -- options for particular phases
364 opt_windres :: [String],
366 -- commands for particular phases
368 pgm_P :: (String,[Option]),
370 pgm_c :: (String,[Option]),
371 pgm_m :: (String,[Option]),
372 pgm_s :: (String,[Option]),
373 pgm_a :: (String,[Option]),
374 pgm_l :: (String,[Option]),
375 pgm_dll :: (String,[Option]),
377 pgm_sysman :: String,
378 pgm_windres :: String,
381 extraPkgConfs :: [FilePath],
382 topDir :: FilePath, -- filled in by SysTools
383 systemPackageConfig :: FilePath, -- ditto
384 -- The -package-conf flags given on the command line, in the order
387 packageFlags :: [PackageFlag],
388 -- The -package and -hide-package flags from the command-line
391 -- NB. do not modify this field, it is calculated by
392 -- Packages.initPackages and Packages.updatePackages.
393 pkgDatabase :: Maybe (UniqFM PackageConfig),
394 pkgState :: PackageState,
400 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
402 haddockOptions :: Maybe String
413 -- | will this target result in an object file on the disk?
414 isObjectTarget :: HscTarget -> Bool
415 isObjectTarget HscC = True
416 isObjectTarget HscAsm = True
417 isObjectTarget _ = False
419 -- | The 'GhcMode' tells us whether we're doing multi-module
420 -- compilation (controlled via the "GHC" API) or one-shot
421 -- (single-module) compilation. This makes a difference primarily to
422 -- the "Finder": in one-shot mode we look for interface files for
423 -- imported modules, but in multi-module mode we look for source files
424 -- in order to check whether they need to be recompiled.
426 = CompManager -- ^ --make, GHCi, etc.
427 | OneShot -- ^ ghc -c Foo.hs
428 | MkDepend -- ^ ghc -M, see Finder for why we need this
431 isOneShot :: GhcMode -> Bool
432 isOneShot OneShot = True
433 isOneShot _other = False
435 -- | What kind of linking to do.
436 data GhcLink -- What to do in the link step, if there is one
437 = NoLink -- Don't link at all
438 | LinkBinary -- Link object code into a binary
439 | LinkInMemory -- Use the in-memory dynamic linker
440 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
443 isNoLink :: GhcLink -> Bool
444 isNoLink NoLink = True
448 = ExposePackage String
450 | IgnorePackage String
453 defaultHscTarget :: HscTarget
454 defaultHscTarget = defaultObjectTarget
456 -- | the 'HscTarget' value corresponding to the default way to create
457 -- object files on the current platform.
458 defaultObjectTarget :: HscTarget
460 | cGhcWithNativeCodeGen == "YES" = HscAsm
465 | Wrapped (Maybe String)
469 initDynFlags :: DynFlags -> IO DynFlags
470 initDynFlags dflags = do
471 -- someday these will be dynamic flags
472 ways <- readIORef v_Ways
473 build_tag <- readIORef v_Build_tag
474 rts_build_tag <- readIORef v_RTS_Build_tag
477 buildTag = build_tag,
478 rtsBuildTag = rts_build_tag
481 defaultDynFlags :: DynFlags
484 ghcMode = CompManager,
485 ghcLink = LinkBinary,
488 hscTarget = defaultHscTarget,
494 maxSimplIterations = 4,
496 specConstrThreshold = Just 200,
497 liberateCaseThreshold = Just 200,
499 cmdlineHcIncludes = [],
503 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
505 thisPackage = mainPackageId,
511 objectSuf = phaseInputExt StopLn,
512 hcSuf = phaseInputExt HCc,
515 outputFile = Nothing,
517 dynLibLoader = Deployable,
518 dumpPrefix = Nothing,
519 dumpPrefixForce = Nothing,
523 cmdlineFrameworks = [],
524 tmpDir = cDEFAULT_TMPDIR,
542 pkgDatabase = Nothing,
543 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
544 haddockOptions = Nothing,
546 Opt_ReadUserPackageConf,
548 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
549 -- behaviour the default, to see if anyone notices
553 Opt_MonomorphismRestriction,
559 Opt_PrintBindContents
561 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
562 -- The default -O0 options
565 log_action = \severity srcSpan style msg ->
567 SevInfo -> hPutStrLn stderr (show (msg style))
568 SevFatal -> hPutStrLn stderr (show (msg style))
569 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
575 0 | print errors & warnings only
576 1 | minimal verbosity: print "compiling M ... done." for each module.
577 2 | equivalent to -dshow-passes
578 3 | equivalent to existing "ghc -v"
579 4 | "ghc -v -ddump-most"
580 5 | "ghc -v -ddump-all"
583 dopt :: DynFlag -> DynFlags -> Bool
584 dopt f dflags = f `elem` (flags dflags)
586 dopt_set :: DynFlags -> DynFlag -> DynFlags
587 dopt_set dfs f = dfs{ flags = f : flags dfs }
589 dopt_unset :: DynFlags -> DynFlag -> DynFlags
590 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
592 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
593 getOpts dflags opts = reverse (opts dflags)
594 -- We add to the options from the front, so we need to reverse the list
596 getVerbFlag :: DynFlags -> String
598 | verbosity dflags >= 3 = "-v"
601 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
602 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
603 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
604 addCmdlineFramework, addHaddockOpts
605 :: String -> DynFlags -> DynFlags
606 setOutputFile, setOutputHi, setDumpPrefixForce
607 :: Maybe String -> DynFlags -> DynFlags
609 setObjectDir f d = d{ objectDir = Just f}
610 setHiDir f d = d{ hiDir = Just f}
611 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
612 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
613 -- #included from the .hc file when compiling with -fvia-C.
615 setObjectSuf f d = d{ objectSuf = f}
616 setHiSuf f d = d{ hiSuf = f}
617 setHcSuf f d = d{ hcSuf = f}
619 setOutputFile f d = d{ outputFile = f}
620 setOutputHi f d = d{ outputHi = f}
622 parseDynLibLoaderMode f d =
624 ("deploy", "") -> d{ dynLibLoader = Deployable }
625 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
626 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
627 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
628 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
629 (_,_) -> error "Unknown dynlib loader"
631 setDumpPrefixForce f d = d { dumpPrefixForce = f}
633 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
634 -- Config.hs should really use Option.
635 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
637 setPgmL f d = d{ pgm_L = f}
638 setPgmF f d = d{ pgm_F = f}
639 setPgmc f d = d{ pgm_c = (f,[])}
640 setPgmm f d = d{ pgm_m = (f,[])}
641 setPgms f d = d{ pgm_s = (f,[])}
642 setPgma f d = d{ pgm_a = (f,[])}
643 setPgml f d = d{ pgm_l = (f,[])}
644 setPgmdll f d = d{ pgm_dll = (f,[])}
645 setPgmwindres f d = d{ pgm_windres = f}
647 addOptL f d = d{ opt_L = f : opt_L d}
648 addOptP f d = d{ opt_P = f : opt_P d}
649 addOptF f d = d{ opt_F = f : opt_F d}
650 addOptc f d = d{ opt_c = f : opt_c d}
651 addOptm f d = d{ opt_m = f : opt_m d}
652 addOpta f d = d{ opt_a = f : opt_a d}
653 addOptl f d = d{ opt_l = f : opt_l d}
654 addOptdep f d = d{ opt_dep = f : opt_dep d}
655 addOptwindres f d = d{ opt_windres = f : opt_windres d}
657 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
659 addHaddockOpts f d = d{ haddockOptions = Just f}
661 -- -----------------------------------------------------------------------------
662 -- Command-line options
664 -- When invoking external tools as part of the compilation pipeline, we
665 -- pass these a sequence of options on the command-line. Rather than
666 -- just using a list of Strings, we use a type that allows us to distinguish
667 -- between filepaths and 'other stuff'. [The reason being, of course, that
668 -- this type gives us a handle on transforming filenames, and filenames only,
669 -- to whatever format they're expected to be on a particular platform.]
672 = FileOption -- an entry that _contains_ filename(s) / filepaths.
673 String -- a non-filepath prefix that shouldn't be
674 -- transformed (e.g., "/out=")
675 String -- the filepath/filename portion
678 -----------------------------------------------------------------------------
679 -- Setting the optimisation level
681 updOptLevel :: Int -> DynFlags -> DynFlags
682 -- Set dynflags appropriate to the optimisation level
684 = dfs2{ optLevel = final_n }
686 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
687 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
688 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
690 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
691 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
693 optLevelFlags :: [([Int], DynFlag)]
695 = [ ([0], Opt_IgnoreInterfacePragmas)
696 , ([0], Opt_OmitInterfacePragmas)
698 , ([1,2], Opt_IgnoreAsserts)
699 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
701 , ([1,2], Opt_DoEtaReduction)
702 , ([1,2], Opt_CaseMerge)
703 , ([1,2], Opt_Strictness)
705 , ([1,2], Opt_FullLaziness)
707 , ([2], Opt_LiberateCase)
708 , ([2], Opt_SpecConstr)
710 , ([0,1,2], Opt_DoLambdaEtaExpansion)
711 -- This one is important for a tiresome reason:
712 -- we want to make sure that the bindings for data
713 -- constructors are eta-expanded. This is probably
714 -- a good thing anyway, but it seems fragile.
717 -- -----------------------------------------------------------------------------
718 -- Standard sets of warning options
720 standardWarnings :: [DynFlag]
722 = [ Opt_WarnDeprecations,
723 Opt_WarnOverlappingPatterns,
724 Opt_WarnMissingFields,
725 Opt_WarnMissingMethods,
726 Opt_WarnDuplicateExports
729 minusWOpts :: [DynFlag]
731 = standardWarnings ++
732 [ Opt_WarnUnusedBinds,
733 Opt_WarnUnusedMatches,
734 Opt_WarnUnusedImports,
735 Opt_WarnIncompletePatterns,
739 minusWallOpts :: [DynFlag]
742 [ Opt_WarnTypeDefaults,
743 Opt_WarnNameShadowing,
749 -- minuswRemovesOpts should be every warning option
750 minuswRemovesOpts :: [DynFlag]
753 [Opt_WarnImplicitPrelude,
754 Opt_WarnIncompletePatternsRecUpd,
755 Opt_WarnSimplePatterns,
756 Opt_WarnMonomorphism,
760 -- -----------------------------------------------------------------------------
761 -- CoreToDo: abstraction of core-to-core passes to run.
763 data CoreToDo -- These are diff core-to-core passes,
764 -- which may be invoked in any order,
765 -- as many times as you like.
767 = CoreDoSimplify -- The core-to-core simplifier.
770 -- Each run of the simplifier can take a different
771 -- set of simplifier-specific flags.
773 | CoreDoFloatOutwards FloatOutSwitches
778 | CoreDoWorkerWrapper
781 | CoreDoOldStrictness
784 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
785 -- matching this string
786 | CoreDoVectorisation
787 | CoreDoNothing -- Useful when building up
788 | CoreDoPasses [CoreToDo] -- lists of these things
790 data SimplifierMode -- See comments in SimplMonad
794 data SimplifierSwitch
795 = MaxSimplifierIterations Int
798 data FloatOutSwitches
799 = FloatOutSw Bool -- True <=> float lambdas to top level
800 Bool -- True <=> float constants to top level,
801 -- even if they do not escape a lambda
804 -- The core-to-core pass ordering is derived from the DynFlags:
805 runWhen :: Bool -> CoreToDo -> CoreToDo
806 runWhen True do_this = do_this
807 runWhen False _ = CoreDoNothing
809 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
810 runMaybe (Just x) f = f x
811 runMaybe Nothing _ = CoreDoNothing
813 getCoreToDo :: DynFlags -> [CoreToDo]
815 | Just todo <- coreToDo dflags = todo -- set explicitly by user
816 | otherwise = core_todo
818 opt_level = optLevel dflags
819 phases = simplPhases dflags
820 max_iter = maxSimplIterations dflags
821 strictness = dopt Opt_Strictness dflags
822 full_laziness = dopt Opt_FullLaziness dflags
823 cse = dopt Opt_CSE dflags
824 spec_constr = dopt Opt_SpecConstr dflags
825 liberate_case = dopt Opt_LiberateCase dflags
826 rule_check = ruleCheck dflags
827 vectorisation = dopt Opt_Vectorise dflags
829 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
831 simpl_phase phase iter = CoreDoPasses
832 [ CoreDoSimplify (SimplPhase phase) [
833 MaxSimplifierIterations iter
835 maybe_rule_check phase
838 -- By default, we have 2 phases before phase 0.
840 -- Want to run with inline phase 2 after the specialiser to give
841 -- maximum chance for fusion to work before we inline build/augment
842 -- in phase 1. This made a difference in 'ansi' where an
843 -- overloaded function wasn't inlined till too late.
845 -- Need phase 1 so that build/augment get
846 -- inlined. I found that spectral/hartel/genfft lost some useful
847 -- strictness in the function sumcode' if augment is not inlined
848 -- before strictness analysis runs
849 simpl_phases = CoreDoPasses [ simpl_phase phase max_iter
850 | phase <- [phases, phases-1 .. 1] ]
853 -- initial simplify: mk specialiser happy: minimum effort please
854 simpl_gently = CoreDoSimplify SimplGently [
856 -- Don't inline anything till full laziness has bitten
857 -- In particular, inlining wrappers inhibits floating
858 -- e.g. ...(case f x of ...)...
859 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
860 -- ==> ...(case x of I# x# -> case fw x# of ...)...
861 -- and now the redex (f x) isn't floatable any more
862 -- Similarly, don't apply any rules until after full
863 -- laziness. Notably, list fusion can prevent floating.
865 NoCaseOfCase, -- Don't do case-of-case transformations.
866 -- This makes full laziness work better
867 MaxSimplifierIterations max_iter
871 if opt_level == 0 then
872 [simpl_phase 0 max_iter]
873 else {- opt_level >= 1 -} [
875 -- initial simplify: mk specialiser happy: minimum effort please
878 -- We run vectorisation here for now, but we might also try to run
880 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
882 -- Specialisation is best done before full laziness
883 -- so that overloaded functions have all their dictionary lambdas manifest
886 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
892 -- Phase 0: allow all Ids to be inlined now
893 -- This gets foldr inlined before strictness analysis
895 -- At least 3 iterations because otherwise we land up with
896 -- huge dead expressions because of an infelicity in the
898 -- let k = BIG in foldr k z xs
899 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
900 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
902 simpl_phase 0 (max max_iter 3),
905 #ifdef OLD_STRICTNESS
908 runWhen strictness (CoreDoPasses [
912 simpl_phase 0 max_iter
915 runWhen full_laziness
916 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
917 True)), -- Float constants
918 -- nofib/spectral/hartel/wang doubles in speed if you
919 -- do full laziness late in the day. It only happens
920 -- after fusion and other stuff, so the early pass doesn't
921 -- catch it. For the record, the redex is
922 -- f_el22 (f_el21 r_midblock)
926 -- We want CSE to follow the final full-laziness pass, because it may
927 -- succeed in commoning up things floated out by full laziness.
928 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
934 -- Case-liberation for -O2. This should be after
935 -- strictness analysis and the simplification which follows it.
936 runWhen liberate_case (CoreDoPasses [
938 simpl_phase 0 max_iter
939 ]), -- Run the simplifier after LiberateCase to vastly
940 -- reduce the possiblility of shadowing
941 -- Reason: see Note [Shadowing] in SpecConstr.lhs
943 runWhen spec_constr CoreDoSpecConstr,
947 -- Final clean-up simplification:
948 simpl_phase 0 max_iter
951 -- -----------------------------------------------------------------------------
952 -- StgToDo: abstraction of stg-to-stg passes to run.
955 = StgDoMassageForProfiling -- should be (next to) last
956 -- There's also setStgVarInfo, but its absolute "lastness"
957 -- is so critical that it is hardwired in (no flag).
960 getStgToDo :: DynFlags -> [StgToDo]
962 | Just todo <- stgToDo dflags = todo -- set explicitly by user
965 stg_stats = dopt Opt_StgStats dflags
967 todo1 = if stg_stats then [D_stg_stats] else []
969 todo2 | WayProf `elem` wayNames dflags
970 = StgDoMassageForProfiling : todo1
974 -- -----------------------------------------------------------------------------
978 allFlags = map ('-':) $
979 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
980 map ("fno-"++) flags ++
984 where ok (PrefixPred _ _) = False
986 flags = map fst fFlags
989 dynamic_flags :: [(String, OptKind DynP)]
991 ( "n" , NoArg (setDynFlag Opt_DryRun) )
992 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
993 , ( "F" , NoArg (setDynFlag Opt_Pp))
994 , ( "#include" , HasArg (addCmdlineHCInclude) )
995 , ( "v" , OptIntSuffix setVerbosity )
997 ------- Specific phases --------------------------------------------
998 , ( "pgmL" , HasArg (upd . setPgmL) )
999 , ( "pgmP" , HasArg (upd . setPgmP) )
1000 , ( "pgmF" , HasArg (upd . setPgmF) )
1001 , ( "pgmc" , HasArg (upd . setPgmc) )
1002 , ( "pgmm" , HasArg (upd . setPgmm) )
1003 , ( "pgms" , HasArg (upd . setPgms) )
1004 , ( "pgma" , HasArg (upd . setPgma) )
1005 , ( "pgml" , HasArg (upd . setPgml) )
1006 , ( "pgmdll" , HasArg (upd . setPgmdll) )
1007 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
1009 , ( "optL" , HasArg (upd . addOptL) )
1010 , ( "optP" , HasArg (upd . addOptP) )
1011 , ( "optF" , HasArg (upd . addOptF) )
1012 , ( "optc" , HasArg (upd . addOptc) )
1013 , ( "optm" , HasArg (upd . addOptm) )
1014 , ( "opta" , HasArg (upd . addOpta) )
1015 , ( "optl" , HasArg (upd . addOptl) )
1016 , ( "optdep" , HasArg (upd . addOptdep) )
1017 , ( "optwindres" , HasArg (upd . addOptwindres) )
1019 , ( "split-objs" , NoArg (if can_split
1020 then setDynFlag Opt_SplitObjs
1023 -------- Linking ----------------------------------------------------
1024 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1025 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1026 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1027 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1029 ------- Libraries ---------------------------------------------------
1030 , ( "L" , Prefix addLibraryPath )
1031 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1033 ------- Frameworks --------------------------------------------------
1034 -- -framework-path should really be -F ...
1035 , ( "framework-path" , HasArg addFrameworkPath )
1036 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1038 ------- Output Redirection ------------------------------------------
1039 , ( "odir" , HasArg (upd . setObjectDir))
1040 , ( "o" , SepArg (upd . setOutputFile . Just))
1041 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1042 , ( "osuf" , HasArg (upd . setObjectSuf))
1043 , ( "hcsuf" , HasArg (upd . setHcSuf))
1044 , ( "hisuf" , HasArg (upd . setHiSuf))
1045 , ( "hidir" , HasArg (upd . setHiDir))
1046 , ( "tmpdir" , HasArg (upd . setTmpDir))
1047 , ( "stubdir" , HasArg (upd . setStubDir))
1048 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1050 ------- Keeping temporary files -------------------------------------
1051 -- These can be singular (think ghc -c) or plural (think ghc --make)
1052 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1053 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1054 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1055 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1056 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1057 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1058 -- This only makes sense as plural
1059 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1061 ------- Miscellaneous ----------------------------------------------
1062 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1063 , ( "main-is" , SepArg setMainIs )
1064 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1065 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1066 , ( "hpcdir" , SepArg setOptHpcDir )
1068 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1069 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1070 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1072 ------- Packages ----------------------------------------------------
1073 , ( "package-conf" , HasArg extraPkgConf_ )
1074 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1075 , ( "package-name" , HasArg (upd . setPackageName) )
1076 , ( "package" , HasArg exposePackage )
1077 , ( "hide-package" , HasArg hidePackage )
1078 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1079 , ( "ignore-package" , HasArg ignorePackage )
1080 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1082 ------ HsCpp opts ---------------------------------------------------
1083 , ( "D", AnySuffix (upd . addOptP) )
1084 , ( "U", AnySuffix (upd . addOptP) )
1086 ------- Include/Import Paths ----------------------------------------
1087 , ( "I" , Prefix addIncludePath)
1088 , ( "i" , OptPrefix addImportPath )
1090 ------ Debugging ----------------------------------------------------
1091 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1093 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1094 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1095 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1096 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1097 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1098 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1099 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1100 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1101 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1102 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1103 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1104 , ( "ddump-asm-regalloc-stages",
1105 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1106 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1107 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1108 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1109 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1110 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1111 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1112 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1113 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1114 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1115 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1116 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1117 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1118 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1119 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1120 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1121 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1122 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1123 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1124 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1125 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1126 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1127 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1128 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1129 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1130 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1131 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1132 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1133 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1134 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1135 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1136 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1137 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1138 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1139 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1140 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1141 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1142 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1143 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1144 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1145 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1146 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1147 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1148 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1149 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1150 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1151 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1152 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1153 setVerbosity (Just 2)) )
1154 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1156 ------ Machine dependant (-m<blah>) stuff ---------------------------
1158 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1159 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1160 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1162 ------ Warning opts -------------------------------------------------
1163 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1164 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1165 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1166 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1167 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1168 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1170 ------ Optimisation flags ------------------------------------------
1171 , ( "O" , NoArg (upd (setOptLevel 1)))
1172 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1173 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1174 -- If the number is missing, use 1
1176 , ( "fsimplifier-phases", IntSuffix (\n ->
1177 upd (\dfs -> dfs{ simplPhases = n })) )
1178 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1179 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1181 , ( "fspec-constr-threshold", IntSuffix (\n ->
1182 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1183 , ( "fno-spec-constr-threshold", NoArg (
1184 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1185 , ( "fliberate-case-threshold", IntSuffix (\n ->
1186 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1187 , ( "fno-liberate-case-threshold", NoArg (
1188 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1190 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1191 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1193 ------ Compiler flags -----------------------------------------------
1195 , ( "fasm", NoArg (setObjTarget HscAsm) )
1196 , ( "fvia-c", NoArg (setObjTarget HscC) )
1197 , ( "fvia-C", NoArg (setObjTarget HscC) )
1199 , ( "fno-code", NoArg (setTarget HscNothing))
1200 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1201 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1203 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1204 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1206 -- the rest of the -f* and -fno-* flags
1207 , ( "f", PrefixPred (isFlag fFlags)
1208 (\f -> setDynFlag (getFlag fFlags f)) )
1209 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1210 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1212 -- the -X* and -XNo* flags
1213 , ( "X", PrefixPred (isFlag xFlags)
1214 (\f -> setDynFlag (getFlag xFlags f)) )
1215 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1216 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1219 -- these -f<blah> flags can all be reversed with -fno-<blah>
1221 fFlags :: [(String, DynFlag)]
1223 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1224 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1225 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1226 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1227 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1228 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1229 ( "warn-missing-fields", Opt_WarnMissingFields ),
1230 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1231 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1232 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1233 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1234 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1235 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1236 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1237 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1238 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1239 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1240 ( "warn-deprecations", Opt_WarnDeprecations ),
1241 ( "warn-orphans", Opt_WarnOrphans ),
1242 ( "warn-tabs", Opt_WarnTabs ),
1243 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1244 ( "strictness", Opt_Strictness ),
1245 ( "full-laziness", Opt_FullLaziness ),
1246 ( "liberate-case", Opt_LiberateCase ),
1247 ( "spec-constr", Opt_SpecConstr ),
1249 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1250 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1251 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1252 ( "ignore-asserts", Opt_IgnoreAsserts ),
1253 ( "do-eta-reduction", Opt_DoEtaReduction ),
1254 ( "case-merge", Opt_CaseMerge ),
1255 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1256 ( "dicts-cheap", Opt_DictsCheap ),
1257 ( "excess-precision", Opt_ExcessPrecision ),
1258 ( "asm-mangling", Opt_DoAsmMangling ),
1259 ( "print-bind-result", Opt_PrintBindResult ),
1260 ( "force-recomp", Opt_ForceRecomp ),
1261 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1262 ( "rewrite-rules", Opt_RewriteRules ),
1263 ( "break-on-exception", Opt_BreakOnException ),
1264 ( "break-on-error", Opt_BreakOnError ),
1265 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1266 ( "print-bind-contents", Opt_PrintBindContents ),
1267 ( "run-cps", Opt_RunCPSZ ),
1268 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1269 ( "vectorise", Opt_Vectorise ),
1270 ( "regs-graph", Opt_RegsGraph),
1271 ( "regs-iterative", Opt_RegsIterative),
1272 -- Deprecated in favour of -XTemplateHaskell:
1273 ( "th", Opt_TemplateHaskell ),
1274 -- Deprecated in favour of -XForeignFunctionInterface:
1275 ( "fi", Opt_ForeignFunctionInterface ),
1276 -- Deprecated in favour of -XForeignFunctionInterface:
1277 ( "ffi", Opt_ForeignFunctionInterface ),
1278 -- Deprecated in favour of -XArrows:
1279 ( "arrows", Opt_Arrows ),
1280 -- Deprecated in favour of -XGenerics:
1281 ( "generics", Opt_Generics ),
1282 -- Deprecated in favour of -XImplicitPrelude:
1283 ( "implicit-prelude", Opt_ImplicitPrelude ),
1284 -- Deprecated in favour of -XBangPatterns:
1285 ( "bang-patterns", Opt_BangPatterns ),
1286 -- Deprecated in favour of -XMonomorphismRestriction:
1287 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1288 -- Deprecated in favour of -XMonoPatBinds:
1289 ( "mono-pat-binds", Opt_MonoPatBinds ),
1290 -- Deprecated in favour of -XExtendedDefaultRules:
1291 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1292 -- Deprecated in favour of -XImplicitParams:
1293 ( "implicit-params", Opt_ImplicitParams ),
1294 -- Deprecated in favour of -XScopedTypeVariables:
1295 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1296 -- Deprecated in favour of -XPArr:
1297 ( "parr", Opt_PArr ),
1298 -- Deprecated in favour of -XOverlappingInstances:
1299 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1300 -- Deprecated in favour of -XUndecidableInstances:
1301 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1302 -- Deprecated in favour of -XIncoherentInstances:
1303 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1304 ( "gen-manifest", Opt_GenManifest ),
1305 ( "embed-manifest", Opt_EmbedManifest )
1308 supportedLanguages :: [String]
1309 supportedLanguages = map fst xFlags
1311 -- These -X<blah> flags can all be reversed with -XNo<blah>
1312 xFlags :: [(String, DynFlag)]
1315 ( "PatternGuards", Opt_PatternGuards ),
1316 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1317 ( "MagicHash", Opt_MagicHash ),
1318 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1319 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1320 ( "KindSignatures", Opt_KindSignatures ),
1321 ( "PatternSignatures", Opt_PatternSignatures ),
1322 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1323 ( "ParallelListComp", Opt_ParallelListComp ),
1324 ( "TransformListComp", Opt_TransformListComp ),
1325 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1326 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1327 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1328 ( "Rank2Types", Opt_Rank2Types ),
1329 ( "RankNTypes", Opt_RankNTypes ),
1330 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1331 ( "TypeOperators", Opt_TypeOperators ),
1332 ( "RecursiveDo", Opt_RecursiveDo ),
1333 ( "Arrows", Opt_Arrows ),
1334 ( "PArr", Opt_PArr ),
1335 ( "TemplateHaskell", Opt_TemplateHaskell ),
1336 ( "QuasiQuotes", Opt_QuasiQuotes ),
1337 ( "Generics", Opt_Generics ),
1339 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1340 ( "RecordWildCards", Opt_RecordWildCards ),
1341 ( "RecordPuns", Opt_RecordPuns ),
1342 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1343 ( "OverloadedStrings", Opt_OverloadedStrings ),
1344 ( "GADTs", Opt_GADTs ),
1345 ( "ViewPatterns", Opt_ViewPatterns),
1346 ( "TypeFamilies", Opt_TypeFamilies ),
1347 ( "BangPatterns", Opt_BangPatterns ),
1349 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1350 -- On by default (which is not strictly H98):
1351 ( "MonoPatBinds", Opt_MonoPatBinds ),
1352 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1353 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1354 ( "ImplicitParams", Opt_ImplicitParams ),
1355 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1356 ( "UnboxedTuples", Opt_UnboxedTuples ),
1357 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1358 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1359 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1360 ( "FlexibleContexts", Opt_FlexibleContexts ),
1361 ( "FlexibleInstances", Opt_FlexibleInstances ),
1362 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1363 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1364 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1365 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1366 ( "OverlappingInstances", Opt_OverlappingInstances ),
1367 ( "UndecidableInstances", Opt_UndecidableInstances ),
1368 ( "IncoherentInstances", Opt_IncoherentInstances )
1371 impliedFlags :: [(DynFlag, [DynFlag])]
1373 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1374 -- be completely rigid for GADTs
1375 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1376 -- Note [Scoped tyvars] in TcBinds
1379 glasgowExtsFlags :: [DynFlag]
1380 glasgowExtsFlags = [
1381 Opt_PrintExplicitForalls
1382 , Opt_ForeignFunctionInterface
1383 , Opt_UnliftedFFITypes
1385 , Opt_ImplicitParams
1386 , Opt_ScopedTypeVariables
1388 , Opt_TypeSynonymInstances
1389 , Opt_StandaloneDeriving
1390 , Opt_DeriveDataTypeable
1391 , Opt_FlexibleContexts
1392 , Opt_FlexibleInstances
1393 , Opt_ConstrainedClassMethods
1394 , Opt_MultiParamTypeClasses
1395 , Opt_FunctionalDependencies
1397 , Opt_PolymorphicComponents
1398 , Opt_ExistentialQuantification
1401 , Opt_LiberalTypeSynonyms
1403 , Opt_ImpredicativeTypes
1406 , Opt_ParallelListComp
1407 , Opt_EmptyDataDecls
1408 , Opt_KindSignatures
1409 , Opt_PatternSignatures
1410 , Opt_GeneralizedNewtypeDeriving
1411 , Opt_TypeFamilies ]
1414 isFlag :: [(String,a)] -> String -> Bool
1415 isFlag flags f = any (\(ff,_) -> ff == f) flags
1417 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1418 isPrefFlag pref flags no_f
1419 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1423 getFlag :: [(String,a)] -> String -> a
1424 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1426 [] -> panic ("get_flag " ++ f)
1428 getPrefFlag :: String -> [(String,a)] -> String -> a
1429 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1430 -- We should only be passed flags which match the prefix
1432 -- -----------------------------------------------------------------------------
1433 -- Parsing the dynamic flags.
1435 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1436 parseDynamicFlags dflags args = do
1437 let ((leftover,errs),dflags')
1438 = runCmdLine (processArgs dynamic_flags args) dflags
1439 when (not (null errs)) $ do
1440 throwDyn (UsageError (unlines errs))
1441 return (dflags', leftover)
1444 type DynP = CmdLineP DynFlags
1446 upd :: (DynFlags -> DynFlags) -> DynP ()
1448 dfs <- getCmdLineState
1449 putCmdLineState $! (f dfs)
1451 --------------------------
1452 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1453 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1455 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1456 -- When you set f, set the ones it implies
1457 -- When you un-set f, however, we don't un-set the things it implies
1458 -- (except for -fno-glasgow-exts, which is treated specially)
1460 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1462 --------------------------
1463 setDumpFlag :: DynFlag -> OptKind DynP
1464 setDumpFlag dump_flag
1465 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1466 -- Whenver we -ddump, switch off the recompilation checker,
1467 -- else you don't see the dump!
1469 setVerbosity :: Maybe Int -> DynP ()
1470 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1472 addCmdlineHCInclude :: String -> DynP ()
1473 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1475 extraPkgConf_ :: FilePath -> DynP ()
1476 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1478 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1480 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1482 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1484 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1486 setPackageName :: String -> DynFlags -> DynFlags
1488 | Nothing <- unpackPackageId pid
1489 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1491 = \s -> s{ thisPackage = pid }
1493 pid = stringToPackageId p
1495 -- If we're linking a binary, then only targets that produce object
1496 -- code are allowed (requests for other target types are ignored).
1497 setTarget :: HscTarget -> DynP ()
1498 setTarget l = upd set
1501 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1504 -- Changes the target only if we're compiling object code. This is
1505 -- used by -fasm and -fvia-C, which switch from one to the other, but
1506 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1507 -- can be safely used in an OPTIONS_GHC pragma.
1508 setObjTarget :: HscTarget -> DynP ()
1509 setObjTarget l = upd set
1512 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1515 setOptLevel :: Int -> DynFlags -> DynFlags
1516 setOptLevel n dflags
1517 | hscTarget dflags == HscInterpreted && n > 0
1519 -- not in IO any more, oh well:
1520 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1522 = updOptLevel n dflags
1525 setMainIs :: String -> DynP ()
1527 | not (null main_fn) && isLower (head main_fn)
1528 -- The arg looked like "Foo.Bar.baz"
1529 = upd $ \d -> d{ mainFunIs = Just main_fn,
1530 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1532 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1533 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1535 | otherwise -- The arg looked like "baz"
1536 = upd $ \d -> d{ mainFunIs = Just arg }
1538 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1540 -----------------------------------------------------------------------------
1541 -- Paths & Libraries
1543 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1545 -- -i on its own deletes the import paths
1546 addImportPath "" = upd (\s -> s{importPaths = []})
1547 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1551 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1554 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1556 addFrameworkPath p =
1557 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1559 #ifndef mingw32_TARGET_OS
1560 split_marker :: Char
1561 split_marker = ':' -- not configurable (ToDo)
1564 splitPathList :: String -> [String]
1565 splitPathList s = filter notNull (splitUp s)
1566 -- empty paths are ignored: there might be a trailing
1567 -- ':' in the initial list, for example. Empty paths can
1568 -- cause confusion when they are translated into -I options
1569 -- for passing to gcc.
1571 #ifndef mingw32_TARGET_OS
1572 splitUp xs = split split_marker xs
1574 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1576 -- That is, if "foo:bar:baz" is used, this interpreted as
1577 -- consisting of three entries, 'foo', 'bar', 'baz'.
1578 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1579 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1581 -- Notice that no attempt is made to fully replace the 'standard'
1582 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1583 -- that this will cause too much breakage for users & ':' will
1584 -- work fine even with DOS paths, if you're not insisting on being silly.
1587 splitUp (x:':':div:xs) | div `elem` dir_markers
1588 = ((x:':':div:p): splitUp rs)
1590 (p,rs) = findNextPath xs
1591 -- we used to check for existence of the path here, but that
1592 -- required the IO monad to be threaded through the command-line
1593 -- parser which is quite inconvenient. The
1594 splitUp xs = cons p (splitUp rs)
1596 (p,rs) = findNextPath xs
1601 -- will be called either when we've consumed nought or the
1602 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1603 -- finding the next split marker.
1605 case break (`elem` split_markers) xs of
1606 (p, _:ds) -> (p, ds)
1609 split_markers :: [Char]
1610 split_markers = [':', ';']
1612 dir_markers :: [Char]
1613 dir_markers = ['/', '\\']
1616 -- -----------------------------------------------------------------------------
1617 -- tmpDir, where we store temporary files.
1619 setTmpDir :: FilePath -> DynFlags -> DynFlags
1620 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1622 #if !defined(mingw32_HOST_OS)
1623 canonicalise p = normalise p
1625 -- Canonicalisation of temp path under win32 is a bit more
1626 -- involved: (a) strip trailing slash,
1627 -- (b) normalise slashes
1628 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1629 canonicalise path = removeTrailingSlash $ normalise $ xltCygdrive path
1631 -- if we're operating under cygwin, and TMP/TEMP is of
1632 -- the form "/cygdrive/drive/path", translate this to
1633 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1634 -- understand /cygdrive paths.)
1635 cygdrivePrefix = [pathSeparator] ++ "/cygdrive/" ++ [pathSeparator]
1636 xltCygdrive path = case maybePrefixMatch cygdrivePrefix path of
1638 | isPathSeparator sep -> drive:':':pathSeparator:xs
1641 -- strip the trailing backslash (awful, but we only do this once).
1642 removeTrailingSlash path
1643 | isPathSeparator (last path) = init path
1647 -----------------------------------------------------------------------------
1650 setOptHpcDir :: String -> DynP ()
1651 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1653 -----------------------------------------------------------------------------
1654 -- Via-C compilation stuff
1656 -- There are some options that we need to pass to gcc when compiling
1657 -- Haskell code via C, but are only supported by recent versions of
1658 -- gcc. The configure script decides which of these options we need,
1659 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1660 -- read before each via-C compilation. The advantage of having these
1661 -- in a separate file is that the file can be created at install-time
1662 -- depending on the available gcc version, and even re-generated later
1663 -- if gcc is upgraded.
1665 -- The options below are not dependent on the version of gcc, only the
1668 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1669 [String]) -- for registerised HC compilations
1670 machdepCCOpts _dflags
1671 #if alpha_TARGET_ARCH
1673 #ifdef HAVE_THREADED_RTS_SUPPORT
1677 -- For now, to suppress the gcc warning "call-clobbered
1678 -- register used for global register variable", we simply
1679 -- disable all warnings altogether using the -w flag. Oh well.
1681 #elif hppa_TARGET_ARCH
1682 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1683 -- (very nice, but too bad the HP /usr/include files don't agree.)
1684 = ( ["-D_HPUX_SOURCE"], [] )
1686 #elif m68k_TARGET_ARCH
1687 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1688 -- popping of args to routines to be explicit; if we let things
1689 -- be deferred 'til after an STGJUMP, imminent death is certain!
1691 -- -fomit-frame-pointer : *don't*
1692 -- It's better to have a6 completely tied up being a frame pointer
1693 -- rather than let GCC pick random things to do with it.
1694 -- (If we want to steal a6, then we would try to do things
1695 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1696 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1698 #elif i386_TARGET_ARCH
1699 -- -fno-defer-pop : basically the same game as for m68k
1701 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1702 -- the fp (%ebp) for our register maps.
1703 = let n_regs = stolen_x86_regs _dflags
1706 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1707 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1710 "-fomit-frame-pointer",
1711 -- we want -fno-builtin, because when gcc inlines
1712 -- built-in functions like memcpy() it tends to
1713 -- run out of registers, requiring -monly-n-regs
1715 "-DSTOLEN_X86_REGS="++show n_regs ]
1718 #elif ia64_TARGET_ARCH
1719 = ( [], ["-fomit-frame-pointer", "-G0"] )
1721 #elif x86_64_TARGET_ARCH
1722 = ( [], ["-fomit-frame-pointer",
1723 "-fno-asynchronous-unwind-tables",
1724 -- the unwind tables are unnecessary for HC code,
1725 -- and get in the way of -split-objs. Another option
1726 -- would be to throw them away in the mangler, but this
1729 -- calling builtins like strlen() using the FFI can
1730 -- cause gcc to run out of regs, so use the external
1734 #elif sparc_TARGET_ARCH
1736 -- For now, to suppress the gcc warning "call-clobbered
1737 -- register used for global register variable", we simply
1738 -- disable all warnings altogether using the -w flag. Oh well.
1740 #elif powerpc_apple_darwin_TARGET
1742 -- Disable Apple's precompiling preprocessor. It's a great thing
1743 -- for "normal" programs, but it doesn't support register variable
1745 = ( [], ["-no-cpp-precomp"] )
1750 picCCOpts :: DynFlags -> [String]
1752 #if darwin_TARGET_OS
1753 -- Apple prefers to do things the other way round.
1754 -- PIC is on by default.
1755 -- -mdynamic-no-pic:
1756 -- Turn off PIC code generation.
1758 -- Don't generate "common" symbols - these are unwanted
1759 -- in dynamic libraries.
1762 = ["-fno-common", "-D__PIC__"]
1764 = ["-mdynamic-no-pic"]
1765 #elif mingw32_TARGET_OS
1766 -- no -fPIC for Windows
1773 = ["-fPIC", "-D__PIC__"]
1778 -- -----------------------------------------------------------------------------
1782 can_split = cSplitObjs == "YES"
1784 -- -----------------------------------------------------------------------------
1787 compilerInfo :: [(String, String)]
1788 compilerInfo = [("Project name", cProjectName),
1789 ("Project version", cProjectVersion),
1790 ("Booter version", cBooterVersion),
1792 ("Interface file version", cHscIfaceFileVersion),
1793 ("Have interpreter", cGhcWithInterpreter),
1794 ("Object splitting", cSplitObjs),
1795 ("Have native code generator", cGhcWithNativeCodeGen),
1796 ("Support SMP", cGhcWithSMP),
1797 ("Unregisterised", cGhcUnregisterised),
1798 ("Tables next to code", cGhcEnableTablesNextToCode),
1799 ("Win32 DLLs", cEnableWin32DLLs),
1800 ("RTS ways", cGhcRTSWays),
1801 ("Leading underscore", cLeadingUnderscore)]