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 shouldDumpSimplPhase :: SimplifierMode -> Bool,
305 ruleCheck :: Maybe String,
307 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
308 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
309 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
311 stolen_x86_regs :: Int,
312 cmdlineHcIncludes :: [String], -- -#includes
313 importPaths :: [FilePath],
315 mainFunIs :: Maybe String,
316 ctxtStkDepth :: Int, -- Typechecker context stack depth
318 thisPackage :: PackageId,
321 wayNames :: [WayName], -- way flags from the cmd line
322 buildTag :: String, -- the global "way" (eg. "p" for prof)
323 rtsBuildTag :: String, -- the RTS "way"
326 objectDir :: Maybe String,
327 hiDir :: Maybe String,
328 stubDir :: Maybe String,
334 outputFile :: Maybe String,
335 outputHi :: Maybe String,
336 dynLibLoader :: DynLibLoader,
338 -- | This is set by DriverPipeline.runPipeline based on where
339 -- its output is going.
340 dumpPrefix :: Maybe FilePath,
342 -- | Override the dumpPrefix set by runPipeline.
343 -- Set by -ddump-file-prefix
344 dumpPrefixForce :: Maybe FilePath,
346 includePaths :: [String],
347 libraryPaths :: [String],
348 frameworkPaths :: [String], -- used on darwin only
349 cmdlineFrameworks :: [String], -- ditto
350 tmpDir :: String, -- no trailing '/'
352 ghcUsagePath :: FilePath, -- Filled in by SysTools
353 ghciUsagePath :: FilePath, -- ditto
355 hpcDir :: String, -- ^ path to store the .mix files
357 -- options for particular phases
366 opt_windres :: [String],
368 -- commands for particular phases
370 pgm_P :: (String,[Option]),
372 pgm_c :: (String,[Option]),
373 pgm_m :: (String,[Option]),
374 pgm_s :: (String,[Option]),
375 pgm_a :: (String,[Option]),
376 pgm_l :: (String,[Option]),
377 pgm_dll :: (String,[Option]),
379 pgm_sysman :: String,
380 pgm_windres :: String,
383 extraPkgConfs :: [FilePath],
384 topDir :: FilePath, -- filled in by SysTools
385 systemPackageConfig :: FilePath, -- ditto
386 -- The -package-conf flags given on the command line, in the order
389 packageFlags :: [PackageFlag],
390 -- The -package and -hide-package flags from the command-line
393 -- NB. do not modify this field, it is calculated by
394 -- Packages.initPackages and Packages.updatePackages.
395 pkgDatabase :: Maybe (UniqFM PackageConfig),
396 pkgState :: PackageState,
402 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
404 haddockOptions :: Maybe String
415 -- | will this target result in an object file on the disk?
416 isObjectTarget :: HscTarget -> Bool
417 isObjectTarget HscC = True
418 isObjectTarget HscAsm = True
419 isObjectTarget _ = False
421 -- | The 'GhcMode' tells us whether we're doing multi-module
422 -- compilation (controlled via the "GHC" API) or one-shot
423 -- (single-module) compilation. This makes a difference primarily to
424 -- the "Finder": in one-shot mode we look for interface files for
425 -- imported modules, but in multi-module mode we look for source files
426 -- in order to check whether they need to be recompiled.
428 = CompManager -- ^ --make, GHCi, etc.
429 | OneShot -- ^ ghc -c Foo.hs
430 | MkDepend -- ^ ghc -M, see Finder for why we need this
433 isOneShot :: GhcMode -> Bool
434 isOneShot OneShot = True
435 isOneShot _other = False
437 -- | What kind of linking to do.
438 data GhcLink -- What to do in the link step, if there is one
439 = NoLink -- Don't link at all
440 | LinkBinary -- Link object code into a binary
441 | LinkInMemory -- Use the in-memory dynamic linker
442 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
445 isNoLink :: GhcLink -> Bool
446 isNoLink NoLink = True
450 = ExposePackage String
452 | IgnorePackage String
455 defaultHscTarget :: HscTarget
456 defaultHscTarget = defaultObjectTarget
458 -- | the 'HscTarget' value corresponding to the default way to create
459 -- object files on the current platform.
460 defaultObjectTarget :: HscTarget
462 | cGhcWithNativeCodeGen == "YES" = HscAsm
467 | Wrapped (Maybe String)
471 initDynFlags :: DynFlags -> IO DynFlags
472 initDynFlags dflags = do
473 -- someday these will be dynamic flags
474 ways <- readIORef v_Ways
475 build_tag <- readIORef v_Build_tag
476 rts_build_tag <- readIORef v_RTS_Build_tag
479 buildTag = build_tag,
480 rtsBuildTag = rts_build_tag
483 defaultDynFlags :: DynFlags
486 ghcMode = CompManager,
487 ghcLink = LinkBinary,
490 hscTarget = defaultHscTarget,
496 maxSimplIterations = 4,
497 shouldDumpSimplPhase = const False,
499 specConstrThreshold = Just 200,
500 specConstrCount = Just 3,
501 liberateCaseThreshold = Just 200,
503 cmdlineHcIncludes = [],
507 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
509 thisPackage = mainPackageId,
515 objectSuf = phaseInputExt StopLn,
516 hcSuf = phaseInputExt HCc,
519 outputFile = Nothing,
521 dynLibLoader = Deployable,
522 dumpPrefix = Nothing,
523 dumpPrefixForce = Nothing,
527 cmdlineFrameworks = [],
528 tmpDir = cDEFAULT_TMPDIR,
546 pkgDatabase = Nothing,
547 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
548 haddockOptions = Nothing,
550 Opt_ReadUserPackageConf,
552 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
553 -- behaviour the default, to see if anyone notices
557 Opt_MonomorphismRestriction,
563 Opt_PrintBindContents
565 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
566 -- The default -O0 options
569 log_action = \severity srcSpan style msg ->
571 SevInfo -> hPutStrLn stderr (show (msg style))
572 SevFatal -> hPutStrLn stderr (show (msg style))
573 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
579 0 | print errors & warnings only
580 1 | minimal verbosity: print "compiling M ... done." for each module.
581 2 | equivalent to -dshow-passes
582 3 | equivalent to existing "ghc -v"
583 4 | "ghc -v -ddump-most"
584 5 | "ghc -v -ddump-all"
587 dopt :: DynFlag -> DynFlags -> Bool
588 dopt f dflags = f `elem` (flags dflags)
590 dopt_set :: DynFlags -> DynFlag -> DynFlags
591 dopt_set dfs f = dfs{ flags = f : flags dfs }
593 dopt_unset :: DynFlags -> DynFlag -> DynFlags
594 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
596 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
597 getOpts dflags opts = reverse (opts dflags)
598 -- We add to the options from the front, so we need to reverse the list
600 getVerbFlag :: DynFlags -> String
602 | verbosity dflags >= 3 = "-v"
605 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
606 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
607 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
608 addCmdlineFramework, addHaddockOpts
609 :: String -> DynFlags -> DynFlags
610 setOutputFile, setOutputHi, setDumpPrefixForce
611 :: Maybe String -> DynFlags -> DynFlags
613 setObjectDir f d = d{ objectDir = Just f}
614 setHiDir f d = d{ hiDir = Just f}
615 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
616 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
617 -- #included from the .hc file when compiling with -fvia-C.
619 setObjectSuf f d = d{ objectSuf = f}
620 setHiSuf f d = d{ hiSuf = f}
621 setHcSuf f d = d{ hcSuf = f}
623 setOutputFile f d = d{ outputFile = f}
624 setOutputHi f d = d{ outputHi = f}
626 parseDynLibLoaderMode f d =
628 ("deploy", "") -> d{ dynLibLoader = Deployable }
629 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
630 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
631 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
632 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
633 (_,_) -> error "Unknown dynlib loader"
635 setDumpPrefixForce f d = d { dumpPrefixForce = f}
637 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
638 -- Config.hs should really use Option.
639 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
641 setPgmL f d = d{ pgm_L = f}
642 setPgmF f d = d{ pgm_F = f}
643 setPgmc f d = d{ pgm_c = (f,[])}
644 setPgmm f d = d{ pgm_m = (f,[])}
645 setPgms f d = d{ pgm_s = (f,[])}
646 setPgma f d = d{ pgm_a = (f,[])}
647 setPgml f d = d{ pgm_l = (f,[])}
648 setPgmdll f d = d{ pgm_dll = (f,[])}
649 setPgmwindres f d = d{ pgm_windres = f}
651 addOptL f d = d{ opt_L = f : opt_L d}
652 addOptP f d = d{ opt_P = f : opt_P d}
653 addOptF f d = d{ opt_F = f : opt_F d}
654 addOptc f d = d{ opt_c = f : opt_c d}
655 addOptm f d = d{ opt_m = f : opt_m d}
656 addOpta f d = d{ opt_a = f : opt_a d}
657 addOptl f d = d{ opt_l = f : opt_l d}
658 addOptdep f d = d{ opt_dep = f : opt_dep d}
659 addOptwindres f d = d{ opt_windres = f : opt_windres d}
661 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
663 addHaddockOpts f d = d{ haddockOptions = Just f}
665 -- -----------------------------------------------------------------------------
666 -- Command-line options
668 -- When invoking external tools as part of the compilation pipeline, we
669 -- pass these a sequence of options on the command-line. Rather than
670 -- just using a list of Strings, we use a type that allows us to distinguish
671 -- between filepaths and 'other stuff'. [The reason being, of course, that
672 -- this type gives us a handle on transforming filenames, and filenames only,
673 -- to whatever format they're expected to be on a particular platform.]
676 = FileOption -- an entry that _contains_ filename(s) / filepaths.
677 String -- a non-filepath prefix that shouldn't be
678 -- transformed (e.g., "/out=")
679 String -- the filepath/filename portion
682 -----------------------------------------------------------------------------
683 -- Setting the optimisation level
685 updOptLevel :: Int -> DynFlags -> DynFlags
686 -- Set dynflags appropriate to the optimisation level
688 = dfs2{ optLevel = final_n }
690 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
691 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
692 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
694 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
695 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
697 optLevelFlags :: [([Int], DynFlag)]
699 = [ ([0], Opt_IgnoreInterfacePragmas)
700 , ([0], Opt_OmitInterfacePragmas)
702 , ([1,2], Opt_IgnoreAsserts)
703 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
705 , ([1,2], Opt_DoEtaReduction)
706 , ([1,2], Opt_CaseMerge)
707 , ([1,2], Opt_Strictness)
709 , ([1,2], Opt_FullLaziness)
711 , ([2], Opt_LiberateCase)
712 , ([2], Opt_SpecConstr)
714 , ([0,1,2], Opt_DoLambdaEtaExpansion)
715 -- This one is important for a tiresome reason:
716 -- we want to make sure that the bindings for data
717 -- constructors are eta-expanded. This is probably
718 -- a good thing anyway, but it seems fragile.
721 -- -----------------------------------------------------------------------------
722 -- Standard sets of warning options
724 standardWarnings :: [DynFlag]
726 = [ Opt_WarnDeprecations,
727 Opt_WarnOverlappingPatterns,
728 Opt_WarnMissingFields,
729 Opt_WarnMissingMethods,
730 Opt_WarnDuplicateExports
733 minusWOpts :: [DynFlag]
735 = standardWarnings ++
736 [ Opt_WarnUnusedBinds,
737 Opt_WarnUnusedMatches,
738 Opt_WarnUnusedImports,
739 Opt_WarnIncompletePatterns,
743 minusWallOpts :: [DynFlag]
746 [ Opt_WarnTypeDefaults,
747 Opt_WarnNameShadowing,
753 -- minuswRemovesOpts should be every warning option
754 minuswRemovesOpts :: [DynFlag]
757 [Opt_WarnImplicitPrelude,
758 Opt_WarnIncompletePatternsRecUpd,
759 Opt_WarnSimplePatterns,
760 Opt_WarnMonomorphism,
764 -- -----------------------------------------------------------------------------
765 -- CoreToDo: abstraction of core-to-core passes to run.
767 data CoreToDo -- These are diff core-to-core passes,
768 -- which may be invoked in any order,
769 -- as many times as you like.
771 = CoreDoSimplify -- The core-to-core simplifier.
774 -- Each run of the simplifier can take a different
775 -- set of simplifier-specific flags.
777 | CoreDoFloatOutwards FloatOutSwitches
782 | CoreDoWorkerWrapper
785 | CoreDoOldStrictness
788 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
789 -- matching this string
790 | CoreDoVectorisation
791 | CoreDoNothing -- Useful when building up
792 | CoreDoPasses [CoreToDo] -- lists of these things
794 data SimplifierMode -- See comments in SimplMonad
796 | SimplPhase Int [String]
798 data SimplifierSwitch
799 = MaxSimplifierIterations Int
802 data FloatOutSwitches
803 = FloatOutSw Bool -- True <=> float lambdas to top level
804 Bool -- True <=> float constants to top level,
805 -- even if they do not escape a lambda
808 -- The core-to-core pass ordering is derived from the DynFlags:
809 runWhen :: Bool -> CoreToDo -> CoreToDo
810 runWhen True do_this = do_this
811 runWhen False _ = CoreDoNothing
813 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
814 runMaybe (Just x) f = f x
815 runMaybe Nothing _ = CoreDoNothing
817 getCoreToDo :: DynFlags -> [CoreToDo]
819 | Just todo <- coreToDo dflags = todo -- set explicitly by user
820 | otherwise = core_todo
822 opt_level = optLevel dflags
823 phases = simplPhases dflags
824 max_iter = maxSimplIterations dflags
825 strictness = dopt Opt_Strictness dflags
826 full_laziness = dopt Opt_FullLaziness dflags
827 cse = dopt Opt_CSE dflags
828 spec_constr = dopt Opt_SpecConstr dflags
829 liberate_case = dopt Opt_LiberateCase dflags
830 rule_check = ruleCheck dflags
831 vectorisation = dopt Opt_Vectorise dflags
833 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
835 simpl_phase phase names iter
837 [ CoreDoSimplify (SimplPhase phase names) [
838 MaxSimplifierIterations iter
840 maybe_rule_check phase
843 -- By default, we have 2 phases before phase 0.
845 -- Want to run with inline phase 2 after the specialiser to give
846 -- maximum chance for fusion to work before we inline build/augment
847 -- in phase 1. This made a difference in 'ansi' where an
848 -- overloaded function wasn't inlined till too late.
850 -- Need phase 1 so that build/augment get
851 -- inlined. I found that spectral/hartel/genfft lost some useful
852 -- strictness in the function sumcode' if augment is not inlined
853 -- before strictness analysis runs
854 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
855 | phase <- [phases, phases-1 .. 1] ]
858 -- initial simplify: mk specialiser happy: minimum effort please
859 simpl_gently = CoreDoSimplify SimplGently [
861 -- Don't inline anything till full laziness has bitten
862 -- In particular, inlining wrappers inhibits floating
863 -- e.g. ...(case f x of ...)...
864 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
865 -- ==> ...(case x of I# x# -> case fw x# of ...)...
866 -- and now the redex (f x) isn't floatable any more
867 -- Similarly, don't apply any rules until after full
868 -- laziness. Notably, list fusion can prevent floating.
870 NoCaseOfCase, -- Don't do case-of-case transformations.
871 -- This makes full laziness work better
872 MaxSimplifierIterations max_iter
876 if opt_level == 0 then
877 [simpl_phase 0 ["final"] max_iter]
878 else {- opt_level >= 1 -} [
880 -- initial simplify: mk specialiser happy: minimum effort please
883 -- We run vectorisation here for now, but we might also try to run
885 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
887 -- Specialisation is best done before full laziness
888 -- so that overloaded functions have all their dictionary lambdas manifest
891 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
897 -- Phase 0: allow all Ids to be inlined now
898 -- This gets foldr inlined before strictness analysis
900 -- At least 3 iterations because otherwise we land up with
901 -- huge dead expressions because of an infelicity in the
903 -- let k = BIG in foldr k z xs
904 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
905 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
907 simpl_phase 0 ["main"] (max max_iter 3),
910 #ifdef OLD_STRICTNESS
913 runWhen strictness (CoreDoPasses [
917 simpl_phase 0 ["post-worker-wrapper"] max_iter
920 runWhen full_laziness
921 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
922 True)), -- Float constants
923 -- nofib/spectral/hartel/wang doubles in speed if you
924 -- do full laziness late in the day. It only happens
925 -- after fusion and other stuff, so the early pass doesn't
926 -- catch it. For the record, the redex is
927 -- f_el22 (f_el21 r_midblock)
931 -- We want CSE to follow the final full-laziness pass, because it may
932 -- succeed in commoning up things floated out by full laziness.
933 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
939 -- Case-liberation for -O2. This should be after
940 -- strictness analysis and the simplification which follows it.
941 runWhen liberate_case (CoreDoPasses [
943 simpl_phase 0 ["post-liberate-case"] max_iter
944 ]), -- Run the simplifier after LiberateCase to vastly
945 -- reduce the possiblility of shadowing
946 -- Reason: see Note [Shadowing] in SpecConstr.lhs
948 runWhen spec_constr CoreDoSpecConstr,
952 -- Final clean-up simplification:
953 simpl_phase 0 ["final"] max_iter
956 -- -----------------------------------------------------------------------------
957 -- StgToDo: abstraction of stg-to-stg passes to run.
960 = StgDoMassageForProfiling -- should be (next to) last
961 -- There's also setStgVarInfo, but its absolute "lastness"
962 -- is so critical that it is hardwired in (no flag).
965 getStgToDo :: DynFlags -> [StgToDo]
967 | Just todo <- stgToDo dflags = todo -- set explicitly by user
970 stg_stats = dopt Opt_StgStats dflags
972 todo1 = if stg_stats then [D_stg_stats] else []
974 todo2 | WayProf `elem` wayNames dflags
975 = StgDoMassageForProfiling : todo1
979 -- -----------------------------------------------------------------------------
983 allFlags = map ('-':) $
984 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
985 map ("fno-"++) flags ++
989 where ok (PrefixPred _ _) = False
991 flags = map fst fFlags
994 dynamic_flags :: [(String, OptKind DynP)]
996 ( "n" , NoArg (setDynFlag Opt_DryRun) )
997 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
998 , ( "F" , NoArg (setDynFlag Opt_Pp))
999 , ( "#include" , HasArg (addCmdlineHCInclude) )
1000 , ( "v" , OptIntSuffix setVerbosity )
1002 ------- Specific phases --------------------------------------------
1003 , ( "pgmL" , HasArg (upd . setPgmL) )
1004 , ( "pgmP" , HasArg (upd . setPgmP) )
1005 , ( "pgmF" , HasArg (upd . setPgmF) )
1006 , ( "pgmc" , HasArg (upd . setPgmc) )
1007 , ( "pgmm" , HasArg (upd . setPgmm) )
1008 , ( "pgms" , HasArg (upd . setPgms) )
1009 , ( "pgma" , HasArg (upd . setPgma) )
1010 , ( "pgml" , HasArg (upd . setPgml) )
1011 , ( "pgmdll" , HasArg (upd . setPgmdll) )
1012 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
1014 , ( "optL" , HasArg (upd . addOptL) )
1015 , ( "optP" , HasArg (upd . addOptP) )
1016 , ( "optF" , HasArg (upd . addOptF) )
1017 , ( "optc" , HasArg (upd . addOptc) )
1018 , ( "optm" , HasArg (upd . addOptm) )
1019 , ( "opta" , HasArg (upd . addOpta) )
1020 , ( "optl" , HasArg (upd . addOptl) )
1021 , ( "optdep" , HasArg (upd . addOptdep) )
1022 , ( "optwindres" , HasArg (upd . addOptwindres) )
1024 , ( "split-objs" , NoArg (if can_split
1025 then setDynFlag Opt_SplitObjs
1028 -------- Linking ----------------------------------------------------
1029 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1030 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1031 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1032 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1034 ------- Libraries ---------------------------------------------------
1035 , ( "L" , Prefix addLibraryPath )
1036 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1038 ------- Frameworks --------------------------------------------------
1039 -- -framework-path should really be -F ...
1040 , ( "framework-path" , HasArg addFrameworkPath )
1041 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1043 ------- Output Redirection ------------------------------------------
1044 , ( "odir" , HasArg (upd . setObjectDir))
1045 , ( "o" , SepArg (upd . setOutputFile . Just))
1046 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1047 , ( "osuf" , HasArg (upd . setObjectSuf))
1048 , ( "hcsuf" , HasArg (upd . setHcSuf))
1049 , ( "hisuf" , HasArg (upd . setHiSuf))
1050 , ( "hidir" , HasArg (upd . setHiDir))
1051 , ( "tmpdir" , HasArg (upd . setTmpDir))
1052 , ( "stubdir" , HasArg (upd . setStubDir))
1053 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1055 ------- Keeping temporary files -------------------------------------
1056 -- These can be singular (think ghc -c) or plural (think ghc --make)
1057 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1058 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1059 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1060 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1061 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1062 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1063 -- This only makes sense as plural
1064 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1066 ------- Miscellaneous ----------------------------------------------
1067 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1068 , ( "main-is" , SepArg setMainIs )
1069 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1070 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1071 , ( "hpcdir" , SepArg setOptHpcDir )
1073 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1074 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1075 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1077 ------- Packages ----------------------------------------------------
1078 , ( "package-conf" , HasArg extraPkgConf_ )
1079 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1080 , ( "package-name" , HasArg (upd . setPackageName) )
1081 , ( "package" , HasArg exposePackage )
1082 , ( "hide-package" , HasArg hidePackage )
1083 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1084 , ( "ignore-package" , HasArg ignorePackage )
1085 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1087 ------ HsCpp opts ---------------------------------------------------
1088 , ( "D", AnySuffix (upd . addOptP) )
1089 , ( "U", AnySuffix (upd . addOptP) )
1091 ------- Include/Import Paths ----------------------------------------
1092 , ( "I" , Prefix addIncludePath)
1093 , ( "i" , OptPrefix addImportPath )
1095 ------ Debugging ----------------------------------------------------
1096 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1098 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1099 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1100 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1101 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1102 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1103 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1104 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1105 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1106 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1107 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1108 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1109 , ( "ddump-asm-regalloc-stages",
1110 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1111 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1112 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1113 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1114 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1115 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1116 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1117 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1118 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1119 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1120 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1121 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1122 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1123 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1124 , ( "ddump-simpl-phases", OptPrefix setDumpSimplPhases)
1125 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1126 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1127 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1128 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1129 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1130 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1131 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1132 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1133 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1134 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1135 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1136 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1137 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1138 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1139 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1140 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1141 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1142 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1143 , ( "dverbose-core2core", NoArg setVerboseCore2Core)
1144 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1145 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1146 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1147 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1148 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1149 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1150 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1151 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1152 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1153 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1154 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1155 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1156 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1157 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1158 setVerbosity (Just 2)) )
1159 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1161 ------ Machine dependant (-m<blah>) stuff ---------------------------
1163 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1164 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1165 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1167 ------ Warning opts -------------------------------------------------
1168 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1169 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1170 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1171 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1172 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1173 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1175 ------ Optimisation flags ------------------------------------------
1176 , ( "O" , NoArg (upd (setOptLevel 1)))
1177 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1178 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1179 -- If the number is missing, use 1
1181 , ( "fsimplifier-phases", IntSuffix (\n ->
1182 upd (\dfs -> dfs{ simplPhases = n })) )
1183 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1184 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1186 , ( "fspec-constr-threshold", IntSuffix (\n ->
1187 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1188 , ( "fno-spec-constr-threshold", NoArg (
1189 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1190 , ( "fspec-constr-count", IntSuffix (\n ->
1191 upd (\dfs -> dfs{ specConstrCount = Just n })))
1192 , ( "fno-spec-constr-count", NoArg (
1193 upd (\dfs -> dfs{ specConstrCount = Nothing })))
1194 , ( "fliberate-case-threshold", IntSuffix (\n ->
1195 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1196 , ( "fno-liberate-case-threshold", NoArg (
1197 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1199 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1200 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1202 ------ Compiler flags -----------------------------------------------
1204 , ( "fasm", NoArg (setObjTarget HscAsm) )
1205 , ( "fvia-c", NoArg (setObjTarget HscC) )
1206 , ( "fvia-C", NoArg (setObjTarget HscC) )
1208 , ( "fno-code", NoArg (setTarget HscNothing))
1209 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1210 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1212 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1213 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1215 -- the rest of the -f* and -fno-* flags
1216 , ( "f", PrefixPred (isFlag fFlags)
1217 (\f -> setDynFlag (getFlag fFlags f)) )
1218 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1219 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1221 -- the -X* and -XNo* flags
1222 , ( "X", PrefixPred (isFlag xFlags)
1223 (\f -> setDynFlag (getFlag xFlags f)) )
1224 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1225 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1228 -- these -f<blah> flags can all be reversed with -fno-<blah>
1230 fFlags :: [(String, DynFlag)]
1232 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1233 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1234 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1235 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1236 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1237 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1238 ( "warn-missing-fields", Opt_WarnMissingFields ),
1239 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1240 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1241 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1242 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1243 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1244 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1245 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1246 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1247 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1248 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1249 ( "warn-deprecations", Opt_WarnDeprecations ),
1250 ( "warn-orphans", Opt_WarnOrphans ),
1251 ( "warn-tabs", Opt_WarnTabs ),
1252 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1253 ( "strictness", Opt_Strictness ),
1254 ( "full-laziness", Opt_FullLaziness ),
1255 ( "liberate-case", Opt_LiberateCase ),
1256 ( "spec-constr", Opt_SpecConstr ),
1258 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1259 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1260 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1261 ( "ignore-asserts", Opt_IgnoreAsserts ),
1262 ( "do-eta-reduction", Opt_DoEtaReduction ),
1263 ( "case-merge", Opt_CaseMerge ),
1264 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1265 ( "dicts-cheap", Opt_DictsCheap ),
1266 ( "excess-precision", Opt_ExcessPrecision ),
1267 ( "asm-mangling", Opt_DoAsmMangling ),
1268 ( "print-bind-result", Opt_PrintBindResult ),
1269 ( "force-recomp", Opt_ForceRecomp ),
1270 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1271 ( "rewrite-rules", Opt_RewriteRules ),
1272 ( "break-on-exception", Opt_BreakOnException ),
1273 ( "break-on-error", Opt_BreakOnError ),
1274 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1275 ( "print-bind-contents", Opt_PrintBindContents ),
1276 ( "run-cps", Opt_RunCPSZ ),
1277 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1278 ( "vectorise", Opt_Vectorise ),
1279 ( "regs-graph", Opt_RegsGraph),
1280 ( "regs-iterative", Opt_RegsIterative),
1281 -- Deprecated in favour of -XTemplateHaskell:
1282 ( "th", Opt_TemplateHaskell ),
1283 -- Deprecated in favour of -XForeignFunctionInterface:
1284 ( "fi", Opt_ForeignFunctionInterface ),
1285 -- Deprecated in favour of -XForeignFunctionInterface:
1286 ( "ffi", Opt_ForeignFunctionInterface ),
1287 -- Deprecated in favour of -XArrows:
1288 ( "arrows", Opt_Arrows ),
1289 -- Deprecated in favour of -XGenerics:
1290 ( "generics", Opt_Generics ),
1291 -- Deprecated in favour of -XImplicitPrelude:
1292 ( "implicit-prelude", Opt_ImplicitPrelude ),
1293 -- Deprecated in favour of -XBangPatterns:
1294 ( "bang-patterns", Opt_BangPatterns ),
1295 -- Deprecated in favour of -XMonomorphismRestriction:
1296 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1297 -- Deprecated in favour of -XMonoPatBinds:
1298 ( "mono-pat-binds", Opt_MonoPatBinds ),
1299 -- Deprecated in favour of -XExtendedDefaultRules:
1300 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1301 -- Deprecated in favour of -XImplicitParams:
1302 ( "implicit-params", Opt_ImplicitParams ),
1303 -- Deprecated in favour of -XScopedTypeVariables:
1304 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1305 -- Deprecated in favour of -XPArr:
1306 ( "parr", Opt_PArr ),
1307 -- Deprecated in favour of -XOverlappingInstances:
1308 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1309 -- Deprecated in favour of -XUndecidableInstances:
1310 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1311 -- Deprecated in favour of -XIncoherentInstances:
1312 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1313 ( "gen-manifest", Opt_GenManifest ),
1314 ( "embed-manifest", Opt_EmbedManifest )
1317 supportedLanguages :: [String]
1318 supportedLanguages = map fst xFlags
1320 -- These -X<blah> flags can all be reversed with -XNo<blah>
1321 xFlags :: [(String, DynFlag)]
1324 ( "PatternGuards", Opt_PatternGuards ),
1325 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1326 ( "MagicHash", Opt_MagicHash ),
1327 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1328 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1329 ( "KindSignatures", Opt_KindSignatures ),
1330 ( "PatternSignatures", Opt_PatternSignatures ),
1331 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1332 ( "ParallelListComp", Opt_ParallelListComp ),
1333 ( "TransformListComp", Opt_TransformListComp ),
1334 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1335 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1336 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1337 ( "Rank2Types", Opt_Rank2Types ),
1338 ( "RankNTypes", Opt_RankNTypes ),
1339 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1340 ( "TypeOperators", Opt_TypeOperators ),
1341 ( "RecursiveDo", Opt_RecursiveDo ),
1342 ( "Arrows", Opt_Arrows ),
1343 ( "PArr", Opt_PArr ),
1344 ( "TemplateHaskell", Opt_TemplateHaskell ),
1345 ( "QuasiQuotes", Opt_QuasiQuotes ),
1346 ( "Generics", Opt_Generics ),
1348 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1349 ( "RecordWildCards", Opt_RecordWildCards ),
1350 ( "RecordPuns", Opt_RecordPuns ),
1351 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1352 ( "OverloadedStrings", Opt_OverloadedStrings ),
1353 ( "GADTs", Opt_GADTs ),
1354 ( "ViewPatterns", Opt_ViewPatterns),
1355 ( "TypeFamilies", Opt_TypeFamilies ),
1356 ( "BangPatterns", Opt_BangPatterns ),
1358 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1359 -- On by default (which is not strictly H98):
1360 ( "MonoPatBinds", Opt_MonoPatBinds ),
1361 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1362 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1363 ( "ImplicitParams", Opt_ImplicitParams ),
1364 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1365 ( "UnboxedTuples", Opt_UnboxedTuples ),
1366 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1367 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1368 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1369 ( "FlexibleContexts", Opt_FlexibleContexts ),
1370 ( "FlexibleInstances", Opt_FlexibleInstances ),
1371 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1372 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1373 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1374 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1375 ( "OverlappingInstances", Opt_OverlappingInstances ),
1376 ( "UndecidableInstances", Opt_UndecidableInstances ),
1377 ( "IncoherentInstances", Opt_IncoherentInstances )
1380 impliedFlags :: [(DynFlag, [DynFlag])]
1382 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1383 -- be completely rigid for GADTs
1384 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1385 -- Note [Scoped tyvars] in TcBinds
1388 glasgowExtsFlags :: [DynFlag]
1389 glasgowExtsFlags = [
1390 Opt_PrintExplicitForalls
1391 , Opt_ForeignFunctionInterface
1392 , Opt_UnliftedFFITypes
1394 , Opt_ImplicitParams
1395 , Opt_ScopedTypeVariables
1397 , Opt_TypeSynonymInstances
1398 , Opt_StandaloneDeriving
1399 , Opt_DeriveDataTypeable
1400 , Opt_FlexibleContexts
1401 , Opt_FlexibleInstances
1402 , Opt_ConstrainedClassMethods
1403 , Opt_MultiParamTypeClasses
1404 , Opt_FunctionalDependencies
1406 , Opt_PolymorphicComponents
1407 , Opt_ExistentialQuantification
1410 , Opt_LiberalTypeSynonyms
1412 , Opt_ImpredicativeTypes
1415 , Opt_ParallelListComp
1416 , Opt_EmptyDataDecls
1417 , Opt_KindSignatures
1418 , Opt_PatternSignatures
1419 , Opt_GeneralizedNewtypeDeriving
1420 , Opt_TypeFamilies ]
1423 isFlag :: [(String,a)] -> String -> Bool
1424 isFlag flags f = any (\(ff,_) -> ff == f) flags
1426 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1427 isPrefFlag pref flags no_f
1428 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1432 getFlag :: [(String,a)] -> String -> a
1433 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1435 [] -> panic ("get_flag " ++ f)
1437 getPrefFlag :: String -> [(String,a)] -> String -> a
1438 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1439 -- We should only be passed flags which match the prefix
1441 -- -----------------------------------------------------------------------------
1442 -- Parsing the dynamic flags.
1444 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1445 parseDynamicFlags dflags args = do
1446 let ((leftover,errs),dflags')
1447 = runCmdLine (processArgs dynamic_flags args) dflags
1448 when (not (null errs)) $ do
1449 throwDyn (UsageError (unlines errs))
1450 return (dflags', leftover)
1453 type DynP = CmdLineP DynFlags
1455 upd :: (DynFlags -> DynFlags) -> DynP ()
1457 dfs <- getCmdLineState
1458 putCmdLineState $! (f dfs)
1460 --------------------------
1461 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1462 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1464 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1465 -- When you set f, set the ones it implies
1466 -- When you un-set f, however, we don't un-set the things it implies
1467 -- (except for -fno-glasgow-exts, which is treated specially)
1469 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1471 --------------------------
1472 setDumpFlag :: DynFlag -> OptKind DynP
1473 setDumpFlag dump_flag
1474 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1475 -- Whenver we -ddump, switch off the recompilation checker,
1476 -- else you don't see the dump!
1478 setVerboseCore2Core :: DynP ()
1479 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1480 setDynFlag Opt_D_verbose_core2core
1481 upd (\s -> s { shouldDumpSimplPhase = const True })
1483 setDumpSimplPhases :: String -> DynP ()
1484 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1485 upd (\s -> s { shouldDumpSimplPhase = spec })
1487 spec :: SimplifierMode -> Bool
1489 . map (join (&&) . map match . split ':')
1495 join :: (Bool -> Bool -> Bool)
1496 -> [SimplifierMode -> Bool]
1497 -> SimplifierMode -> Bool
1498 join _ [] = const True
1499 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1501 match :: String -> SimplifierMode -> Bool
1502 match "" = const True
1503 match s = case reads s of
1504 [(n,"")] -> phase_num n
1507 phase_num :: Int -> SimplifierMode -> Bool
1508 phase_num n (SimplPhase k _) = n == k
1509 phase_num _ _ = False
1511 phase_name :: String -> SimplifierMode -> Bool
1512 phase_name s SimplGently = s == "gentle"
1513 phase_name s (SimplPhase _ ss) = s `elem` ss
1515 setVerbosity :: Maybe Int -> DynP ()
1516 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1518 addCmdlineHCInclude :: String -> DynP ()
1519 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1521 extraPkgConf_ :: FilePath -> DynP ()
1522 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1524 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1526 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1528 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1530 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1532 setPackageName :: String -> DynFlags -> DynFlags
1534 | Nothing <- unpackPackageId pid
1535 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1537 = \s -> s{ thisPackage = pid }
1539 pid = stringToPackageId p
1541 -- If we're linking a binary, then only targets that produce object
1542 -- code are allowed (requests for other target types are ignored).
1543 setTarget :: HscTarget -> DynP ()
1544 setTarget l = upd set
1547 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1550 -- Changes the target only if we're compiling object code. This is
1551 -- used by -fasm and -fvia-C, which switch from one to the other, but
1552 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1553 -- can be safely used in an OPTIONS_GHC pragma.
1554 setObjTarget :: HscTarget -> DynP ()
1555 setObjTarget l = upd set
1558 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1561 setOptLevel :: Int -> DynFlags -> DynFlags
1562 setOptLevel n dflags
1563 | hscTarget dflags == HscInterpreted && n > 0
1565 -- not in IO any more, oh well:
1566 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1568 = updOptLevel n dflags
1571 setMainIs :: String -> DynP ()
1573 | not (null main_fn) && isLower (head main_fn)
1574 -- The arg looked like "Foo.Bar.baz"
1575 = upd $ \d -> d{ mainFunIs = Just main_fn,
1576 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1578 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1579 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1581 | otherwise -- The arg looked like "baz"
1582 = upd $ \d -> d{ mainFunIs = Just arg }
1584 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1586 -----------------------------------------------------------------------------
1587 -- Paths & Libraries
1589 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1591 -- -i on its own deletes the import paths
1592 addImportPath "" = upd (\s -> s{importPaths = []})
1593 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1597 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1600 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1602 addFrameworkPath p =
1603 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1605 #ifndef mingw32_TARGET_OS
1606 split_marker :: Char
1607 split_marker = ':' -- not configurable (ToDo)
1610 splitPathList :: String -> [String]
1611 splitPathList s = filter notNull (splitUp s)
1612 -- empty paths are ignored: there might be a trailing
1613 -- ':' in the initial list, for example. Empty paths can
1614 -- cause confusion when they are translated into -I options
1615 -- for passing to gcc.
1617 #ifndef mingw32_TARGET_OS
1618 splitUp xs = split split_marker xs
1620 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1622 -- That is, if "foo:bar:baz" is used, this interpreted as
1623 -- consisting of three entries, 'foo', 'bar', 'baz'.
1624 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1625 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1627 -- Notice that no attempt is made to fully replace the 'standard'
1628 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1629 -- that this will cause too much breakage for users & ':' will
1630 -- work fine even with DOS paths, if you're not insisting on being silly.
1633 splitUp (x:':':div:xs) | div `elem` dir_markers
1634 = ((x:':':div:p): splitUp rs)
1636 (p,rs) = findNextPath xs
1637 -- we used to check for existence of the path here, but that
1638 -- required the IO monad to be threaded through the command-line
1639 -- parser which is quite inconvenient. The
1640 splitUp xs = cons p (splitUp rs)
1642 (p,rs) = findNextPath xs
1647 -- will be called either when we've consumed nought or the
1648 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1649 -- finding the next split marker.
1651 case break (`elem` split_markers) xs of
1652 (p, _:ds) -> (p, ds)
1655 split_markers :: [Char]
1656 split_markers = [':', ';']
1658 dir_markers :: [Char]
1659 dir_markers = ['/', '\\']
1662 -- -----------------------------------------------------------------------------
1663 -- tmpDir, where we store temporary files.
1665 setTmpDir :: FilePath -> DynFlags -> DynFlags
1666 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1667 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1668 -- seem necessary now --SDM 7/2/2008
1670 -----------------------------------------------------------------------------
1673 setOptHpcDir :: String -> DynP ()
1674 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1676 -----------------------------------------------------------------------------
1677 -- Via-C compilation stuff
1679 -- There are some options that we need to pass to gcc when compiling
1680 -- Haskell code via C, but are only supported by recent versions of
1681 -- gcc. The configure script decides which of these options we need,
1682 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1683 -- read before each via-C compilation. The advantage of having these
1684 -- in a separate file is that the file can be created at install-time
1685 -- depending on the available gcc version, and even re-generated later
1686 -- if gcc is upgraded.
1688 -- The options below are not dependent on the version of gcc, only the
1691 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1692 [String]) -- for registerised HC compilations
1693 machdepCCOpts _dflags
1694 #if alpha_TARGET_ARCH
1696 #ifdef HAVE_THREADED_RTS_SUPPORT
1700 -- For now, to suppress the gcc warning "call-clobbered
1701 -- register used for global register variable", we simply
1702 -- disable all warnings altogether using the -w flag. Oh well.
1704 #elif hppa_TARGET_ARCH
1705 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1706 -- (very nice, but too bad the HP /usr/include files don't agree.)
1707 = ( ["-D_HPUX_SOURCE"], [] )
1709 #elif m68k_TARGET_ARCH
1710 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1711 -- popping of args to routines to be explicit; if we let things
1712 -- be deferred 'til after an STGJUMP, imminent death is certain!
1714 -- -fomit-frame-pointer : *don't*
1715 -- It's better to have a6 completely tied up being a frame pointer
1716 -- rather than let GCC pick random things to do with it.
1717 -- (If we want to steal a6, then we would try to do things
1718 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1719 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1721 #elif i386_TARGET_ARCH
1722 -- -fno-defer-pop : basically the same game as for m68k
1724 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1725 -- the fp (%ebp) for our register maps.
1726 = let n_regs = stolen_x86_regs _dflags
1729 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1730 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1733 "-fomit-frame-pointer",
1734 -- we want -fno-builtin, because when gcc inlines
1735 -- built-in functions like memcpy() it tends to
1736 -- run out of registers, requiring -monly-n-regs
1738 "-DSTOLEN_X86_REGS="++show n_regs ]
1741 #elif ia64_TARGET_ARCH
1742 = ( [], ["-fomit-frame-pointer", "-G0"] )
1744 #elif x86_64_TARGET_ARCH
1745 = ( [], ["-fomit-frame-pointer",
1746 "-fno-asynchronous-unwind-tables",
1747 -- the unwind tables are unnecessary for HC code,
1748 -- and get in the way of -split-objs. Another option
1749 -- would be to throw them away in the mangler, but this
1752 -- calling builtins like strlen() using the FFI can
1753 -- cause gcc to run out of regs, so use the external
1757 #elif sparc_TARGET_ARCH
1759 -- For now, to suppress the gcc warning "call-clobbered
1760 -- register used for global register variable", we simply
1761 -- disable all warnings altogether using the -w flag. Oh well.
1763 #elif powerpc_apple_darwin_TARGET
1765 -- Disable Apple's precompiling preprocessor. It's a great thing
1766 -- for "normal" programs, but it doesn't support register variable
1768 = ( [], ["-no-cpp-precomp"] )
1773 picCCOpts :: DynFlags -> [String]
1775 #if darwin_TARGET_OS
1776 -- Apple prefers to do things the other way round.
1777 -- PIC is on by default.
1778 -- -mdynamic-no-pic:
1779 -- Turn off PIC code generation.
1781 -- Don't generate "common" symbols - these are unwanted
1782 -- in dynamic libraries.
1785 = ["-fno-common", "-D__PIC__"]
1787 = ["-mdynamic-no-pic"]
1788 #elif mingw32_TARGET_OS
1789 -- no -fPIC for Windows
1796 = ["-fPIC", "-D__PIC__"]
1801 -- -----------------------------------------------------------------------------
1805 can_split = cSplitObjs == "YES"
1807 -- -----------------------------------------------------------------------------
1810 compilerInfo :: [(String, String)]
1811 compilerInfo = [("Project name", cProjectName),
1812 ("Project version", cProjectVersion),
1813 ("Booter version", cBooterVersion),
1815 ("Interface file version", cHscIfaceFileVersion),
1816 ("Have interpreter", cGhcWithInterpreter),
1817 ("Object splitting", cSplitObjs),
1818 ("Have native code generator", cGhcWithNativeCodeGen),
1819 ("Support SMP", cGhcWithSMP),
1820 ("Unregisterised", cGhcUnregisterised),
1821 ("Tables next to code", cGhcEnableTablesNextToCode),
1822 ("Win32 DLLs", cEnableWin32DLLs),
1823 ("RTS ways", cGhcRTSWays),
1824 ("Leading underscore", cLeadingUnderscore)]