2 {-# OPTIONS -fno-warn-missing-fields #-}
3 -- The above warning supression flag is a temporary kludge.
4 -- While working on this module you are encouraged to remove it and fix
5 -- any warnings in the module. See
6 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
9 -----------------------------------------------------------------------------
13 -- Most flags are dynamic flags, which means they can change from
14 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
15 -- multi-session GHC each session can be using different dynamic
16 -- flags. Dynamic flags can also be set at the prompt in GHCi.
18 -- (c) The University of Glasgow 2005
20 -----------------------------------------------------------------------------
26 HscTarget(..), isObjectTarget, defaultObjectTarget,
27 GhcMode(..), isOneShot,
28 GhcLink(..), isNoLink,
34 -- Configuration of the core-to-core and stg-to-stg phases
38 SimplifierMode(..), FloatOutSwitches(..),
39 getCoreToDo, getStgToDo,
41 -- Manipulating DynFlags
42 defaultDynFlags, -- DynFlags
43 initDynFlags, -- DynFlags -> IO DynFlags
45 dopt, -- DynFlag -> DynFlags -> Bool
46 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
47 getOpts, -- (DynFlags -> [a]) -> IO [a]
58 machdepCCOpts, picCCOpts,
63 #include "HsVersions.h"
67 import PrelNames ( mAIN )
68 #ifdef i386_TARGET_ARCH
69 import StaticFlags ( opt_Static )
71 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
73 import {-# SOURCE #-} Packages (PackageState)
74 import DriverPhases ( Phase(..), phaseInputExt )
77 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
78 import Panic ( panic, GhcException(..) )
79 import UniqFM ( UniqFM )
81 import Maybes ( orElse, fromJust )
82 import SrcLoc ( SrcSpan )
84 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
86 import Data.IORef ( readIORef )
87 import Control.Exception ( throwDyn )
88 import Control.Monad ( when )
91 import System.FilePath
92 import System.IO ( hPutStrLn, stderr )
94 -- -----------------------------------------------------------------------------
102 | Opt_D_dump_cmmz_pretty
106 | Opt_D_dump_asm_native
107 | Opt_D_dump_asm_liveness
108 | Opt_D_dump_asm_coalesce
109 | Opt_D_dump_asm_regalloc
110 | Opt_D_dump_asm_regalloc_stages
111 | Opt_D_dump_asm_conflicts
112 | Opt_D_dump_asm_stats
118 | Opt_D_dump_inlinings
119 | Opt_D_dump_rule_firings
120 | Opt_D_dump_occur_anal
124 | Opt_D_dump_simpl_iterations
125 | Opt_D_dump_simpl_phases
134 | Opt_D_dump_worker_wrapper
135 | Opt_D_dump_rn_trace
136 | Opt_D_dump_rn_stats
138 | Opt_D_dump_simpl_stats
139 | Opt_D_dump_tc_trace
140 | Opt_D_dump_if_trace
146 | Opt_D_verbose_core2core
147 | Opt_D_verbose_stg2stg
149 | Opt_D_dump_hi_diffs
150 | Opt_D_dump_minimal_imports
151 | Opt_D_dump_mod_cycles
152 | Opt_D_dump_view_pattern_commoning
153 | Opt_D_faststring_stats
154 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
160 | Opt_WarnIsError -- -Werror; makes warnings fatal
161 | Opt_WarnDuplicateExports
163 | Opt_WarnImplicitPrelude
164 | Opt_WarnIncompletePatterns
165 | Opt_WarnIncompletePatternsRecUpd
166 | Opt_WarnMissingFields
167 | Opt_WarnMissingMethods
168 | Opt_WarnMissingSigs
169 | Opt_WarnNameShadowing
170 | Opt_WarnOverlappingPatterns
171 | Opt_WarnSimplePatterns
172 | Opt_WarnTypeDefaults
173 | Opt_WarnMonomorphism
174 | Opt_WarnUnusedBinds
175 | Opt_WarnUnusedImports
176 | Opt_WarnUnusedMatches
177 | Opt_WarnDeprecations
178 | Opt_WarnDodgyImports
183 | Opt_OverlappingInstances
184 | Opt_UndecidableInstances
185 | Opt_IncoherentInstances
186 | Opt_MonomorphismRestriction
188 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
189 | Opt_ForeignFunctionInterface
190 | Opt_UnliftedFFITypes
191 | Opt_PArr -- Syntactic support for parallel arrays
192 | Opt_Arrows -- Arrow-notation syntax
193 | Opt_TemplateHaskell
197 | Opt_ImplicitPrelude
198 | Opt_ScopedTypeVariables
202 | Opt_OverloadedStrings
203 | Opt_DisambiguateRecordFields
204 | Opt_RecordWildCards
209 | Opt_StandaloneDeriving
210 | Opt_DeriveDataTypeable
211 | Opt_TypeSynonymInstances
212 | Opt_FlexibleContexts
213 | Opt_FlexibleInstances
214 | Opt_ConstrainedClassMethods
215 | Opt_MultiParamTypeClasses
216 | Opt_FunctionalDependencies
218 | Opt_PolymorphicComponents
219 | Opt_ExistentialQuantification
223 | Opt_PatternSignatures
224 | Opt_ParallelListComp
225 | Opt_TransformListComp
226 | Opt_GeneralizedNewtypeDeriving
229 | Opt_LiberalTypeSynonyms
232 | Opt_ImpredicativeTypes
235 | Opt_PrintExplicitForalls
240 | Opt_StaticArgumentTransformation
244 | Opt_IgnoreInterfacePragmas
245 | Opt_OmitInterfacePragmas
246 | Opt_DoLambdaEtaExpansion
250 | Opt_UnboxStrictFields
254 | Opt_RegsGraph -- do graph coloring register allocation
255 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
263 | Opt_ExcessPrecision
264 | Opt_ReadUserPackageConf
268 | Opt_HideAllPackages
269 | Opt_PrintBindResult
273 | Opt_BreakOnException
275 | Opt_PrintEvldWithShow
276 | Opt_PrintBindContents
280 | Opt_ConvertToZipCfgAndBack
291 data DynFlags = DynFlags {
294 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
295 stgToDo :: Maybe [StgToDo], -- similarly
296 hscTarget :: HscTarget,
297 hscOutName :: String, -- name of the output file
298 extCoreName :: String, -- name of the .core output file
299 verbosity :: Int, -- verbosity level
300 optLevel :: Int, -- optimisation level
301 simplPhases :: Int, -- number of simplifier phases
302 maxSimplIterations :: Int, -- max simplifier iterations
303 shouldDumpSimplPhase :: SimplifierMode -> Bool,
304 ruleCheck :: Maybe String,
306 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
307 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
308 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
310 stolen_x86_regs :: Int,
311 cmdlineHcIncludes :: [String], -- -#includes
312 importPaths :: [FilePath],
314 mainFunIs :: Maybe String,
315 ctxtStkDepth :: Int, -- Typechecker context stack depth
317 thisPackage :: PackageId,
320 wayNames :: [WayName], -- way flags from the cmd line
321 buildTag :: String, -- the global "way" (eg. "p" for prof)
322 rtsBuildTag :: String, -- the RTS "way"
325 objectDir :: Maybe String,
326 hiDir :: Maybe String,
327 stubDir :: Maybe String,
333 outputFile :: Maybe String,
334 outputHi :: Maybe String,
335 dynLibLoader :: DynLibLoader,
337 -- | This is set by DriverPipeline.runPipeline based on where
338 -- its output is going.
339 dumpPrefix :: Maybe FilePath,
341 -- | Override the dumpPrefix set by runPipeline.
342 -- Set by -ddump-file-prefix
343 dumpPrefixForce :: Maybe FilePath,
345 includePaths :: [String],
346 libraryPaths :: [String],
347 frameworkPaths :: [String], -- used on darwin only
348 cmdlineFrameworks :: [String], -- ditto
349 tmpDir :: String, -- no trailing '/'
351 ghcUsagePath :: FilePath, -- Filled in by SysTools
352 ghciUsagePath :: FilePath, -- ditto
354 hpcDir :: String, -- ^ path to store the .mix files
356 -- options for particular phases
365 opt_windres :: [String],
367 -- commands for particular phases
369 pgm_P :: (String,[Option]),
371 pgm_c :: (String,[Option]),
372 pgm_m :: (String,[Option]),
373 pgm_s :: (String,[Option]),
374 pgm_a :: (String,[Option]),
375 pgm_l :: (String,[Option]),
376 pgm_dll :: (String,[Option]),
378 pgm_sysman :: String,
379 pgm_windres :: String,
382 extraPkgConfs :: [FilePath],
383 topDir :: FilePath, -- filled in by SysTools
384 systemPackageConfig :: FilePath, -- ditto
385 -- The -package-conf flags given on the command line, in the order
388 packageFlags :: [PackageFlag],
389 -- The -package and -hide-package flags from the command-line
392 -- NB. do not modify this field, it is calculated by
393 -- Packages.initPackages and Packages.updatePackages.
394 pkgDatabase :: Maybe (UniqFM PackageConfig),
395 pkgState :: PackageState,
401 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
403 haddockOptions :: Maybe String
414 -- | will this target result in an object file on the disk?
415 isObjectTarget :: HscTarget -> Bool
416 isObjectTarget HscC = True
417 isObjectTarget HscAsm = True
418 isObjectTarget _ = False
420 -- | The 'GhcMode' tells us whether we're doing multi-module
421 -- compilation (controlled via the "GHC" API) or one-shot
422 -- (single-module) compilation. This makes a difference primarily to
423 -- the "Finder": in one-shot mode we look for interface files for
424 -- imported modules, but in multi-module mode we look for source files
425 -- in order to check whether they need to be recompiled.
427 = CompManager -- ^ --make, GHCi, etc.
428 | OneShot -- ^ ghc -c Foo.hs
429 | MkDepend -- ^ ghc -M, see Finder for why we need this
432 isOneShot :: GhcMode -> Bool
433 isOneShot OneShot = True
434 isOneShot _other = False
436 -- | What kind of linking to do.
437 data GhcLink -- What to do in the link step, if there is one
438 = NoLink -- Don't link at all
439 | LinkBinary -- Link object code into a binary
440 | LinkInMemory -- Use the in-memory dynamic linker
441 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
444 isNoLink :: GhcLink -> Bool
445 isNoLink NoLink = True
449 = ExposePackage String
451 | IgnorePackage String
454 defaultHscTarget :: HscTarget
455 defaultHscTarget = defaultObjectTarget
457 -- | the 'HscTarget' value corresponding to the default way to create
458 -- object files on the current platform.
459 defaultObjectTarget :: HscTarget
461 | cGhcWithNativeCodeGen == "YES" = HscAsm
466 | Wrapped (Maybe String)
470 initDynFlags :: DynFlags -> IO DynFlags
471 initDynFlags dflags = do
472 -- someday these will be dynamic flags
473 ways <- readIORef v_Ways
474 build_tag <- readIORef v_Build_tag
475 rts_build_tag <- readIORef v_RTS_Build_tag
478 buildTag = build_tag,
479 rtsBuildTag = rts_build_tag
482 defaultDynFlags :: DynFlags
485 ghcMode = CompManager,
486 ghcLink = LinkBinary,
489 hscTarget = defaultHscTarget,
495 maxSimplIterations = 4,
496 shouldDumpSimplPhase = const False,
498 specConstrThreshold = Just 200,
499 specConstrCount = Just 3,
500 liberateCaseThreshold = Just 200,
502 cmdlineHcIncludes = [],
506 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
508 thisPackage = mainPackageId,
514 objectSuf = phaseInputExt StopLn,
515 hcSuf = phaseInputExt HCc,
518 outputFile = Nothing,
520 dynLibLoader = Deployable,
521 dumpPrefix = Nothing,
522 dumpPrefixForce = Nothing,
526 cmdlineFrameworks = [],
527 tmpDir = cDEFAULT_TMPDIR,
545 pkgDatabase = Nothing,
546 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
547 haddockOptions = Nothing,
549 Opt_ReadUserPackageConf,
551 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
552 -- behaviour the default, to see if anyone notices
556 Opt_MonomorphismRestriction,
562 Opt_PrintBindContents
564 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
565 -- The default -O0 options
568 log_action = \severity srcSpan style msg ->
570 SevInfo -> hPutStrLn stderr (show (msg style))
571 SevFatal -> hPutStrLn stderr (show (msg style))
572 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
578 0 | print errors & warnings only
579 1 | minimal verbosity: print "compiling M ... done." for each module.
580 2 | equivalent to -dshow-passes
581 3 | equivalent to existing "ghc -v"
582 4 | "ghc -v -ddump-most"
583 5 | "ghc -v -ddump-all"
586 dopt :: DynFlag -> DynFlags -> Bool
587 dopt f dflags = f `elem` (flags dflags)
589 dopt_set :: DynFlags -> DynFlag -> DynFlags
590 dopt_set dfs f = dfs{ flags = f : flags dfs }
592 dopt_unset :: DynFlags -> DynFlag -> DynFlags
593 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
595 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
596 getOpts dflags opts = reverse (opts dflags)
597 -- We add to the options from the front, so we need to reverse the list
599 getVerbFlag :: DynFlags -> String
601 | verbosity dflags >= 3 = "-v"
604 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
605 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
606 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
607 addCmdlineFramework, addHaddockOpts
608 :: String -> DynFlags -> DynFlags
609 setOutputFile, setOutputHi, setDumpPrefixForce
610 :: Maybe String -> DynFlags -> DynFlags
612 setObjectDir f d = d{ objectDir = Just f}
613 setHiDir f d = d{ hiDir = Just f}
614 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
615 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
616 -- #included from the .hc file when compiling with -fvia-C.
618 setObjectSuf f d = d{ objectSuf = f}
619 setHiSuf f d = d{ hiSuf = f}
620 setHcSuf f d = d{ hcSuf = f}
622 setOutputFile f d = d{ outputFile = f}
623 setOutputHi f d = d{ outputHi = f}
625 parseDynLibLoaderMode f d =
627 ("deploy", "") -> d{ dynLibLoader = Deployable }
628 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
629 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
630 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
631 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
632 (_,_) -> error "Unknown dynlib loader"
634 setDumpPrefixForce f d = d { dumpPrefixForce = f}
636 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
637 -- Config.hs should really use Option.
638 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
640 setPgmL f d = d{ pgm_L = f}
641 setPgmF f d = d{ pgm_F = f}
642 setPgmc f d = d{ pgm_c = (f,[])}
643 setPgmm f d = d{ pgm_m = (f,[])}
644 setPgms f d = d{ pgm_s = (f,[])}
645 setPgma f d = d{ pgm_a = (f,[])}
646 setPgml f d = d{ pgm_l = (f,[])}
647 setPgmdll f d = d{ pgm_dll = (f,[])}
648 setPgmwindres f d = d{ pgm_windres = f}
650 addOptL f d = d{ opt_L = f : opt_L d}
651 addOptP f d = d{ opt_P = f : opt_P d}
652 addOptF f d = d{ opt_F = f : opt_F d}
653 addOptc f d = d{ opt_c = f : opt_c d}
654 addOptm f d = d{ opt_m = f : opt_m d}
655 addOpta f d = d{ opt_a = f : opt_a d}
656 addOptl f d = d{ opt_l = f : opt_l d}
657 addOptdep f d = d{ opt_dep = f : opt_dep d}
658 addOptwindres f d = d{ opt_windres = f : opt_windres d}
660 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
662 addHaddockOpts f d = d{ haddockOptions = Just f}
664 -- -----------------------------------------------------------------------------
665 -- Command-line options
667 -- When invoking external tools as part of the compilation pipeline, we
668 -- pass these a sequence of options on the command-line. Rather than
669 -- just using a list of Strings, we use a type that allows us to distinguish
670 -- between filepaths and 'other stuff'. [The reason being, of course, that
671 -- this type gives us a handle on transforming filenames, and filenames only,
672 -- to whatever format they're expected to be on a particular platform.]
675 = FileOption -- an entry that _contains_ filename(s) / filepaths.
676 String -- a non-filepath prefix that shouldn't be
677 -- transformed (e.g., "/out=")
678 String -- the filepath/filename portion
681 -----------------------------------------------------------------------------
682 -- Setting the optimisation level
684 updOptLevel :: Int -> DynFlags -> DynFlags
685 -- Set dynflags appropriate to the optimisation level
687 = dfs2{ optLevel = final_n }
689 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
690 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
691 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
693 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
694 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
696 optLevelFlags :: [([Int], DynFlag)]
698 = [ ([0], Opt_IgnoreInterfacePragmas)
699 , ([0], Opt_OmitInterfacePragmas)
701 , ([1,2], Opt_IgnoreAsserts)
702 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
704 , ([1,2], Opt_DoEtaReduction)
705 , ([1,2], Opt_CaseMerge)
706 , ([1,2], Opt_Strictness)
708 , ([1,2], Opt_FullLaziness)
710 , ([2], Opt_LiberateCase)
711 , ([2], Opt_SpecConstr)
712 , ([2], Opt_StaticArgumentTransformation)
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
832 static_args = dopt Opt_StaticArgumentTransformation dflags
834 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
836 simpl_phase phase names iter
838 [ CoreDoSimplify (SimplPhase phase names) [
839 MaxSimplifierIterations iter
841 maybe_rule_check phase
844 -- By default, we have 2 phases before phase 0.
846 -- Want to run with inline phase 2 after the specialiser to give
847 -- maximum chance for fusion to work before we inline build/augment
848 -- in phase 1. This made a difference in 'ansi' where an
849 -- overloaded function wasn't inlined till too late.
851 -- Need phase 1 so that build/augment get
852 -- inlined. I found that spectral/hartel/genfft lost some useful
853 -- strictness in the function sumcode' if augment is not inlined
854 -- before strictness analysis runs
855 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
856 | phase <- [phases, phases-1 .. 1] ]
859 -- initial simplify: mk specialiser happy: minimum effort please
860 simpl_gently = CoreDoSimplify SimplGently [
862 -- Don't inline anything till full laziness has bitten
863 -- In particular, inlining wrappers inhibits floating
864 -- e.g. ...(case f x of ...)...
865 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
866 -- ==> ...(case x of I# x# -> case fw x# of ...)...
867 -- and now the redex (f x) isn't floatable any more
868 -- Similarly, don't apply any rules until after full
869 -- laziness. Notably, list fusion can prevent floating.
871 NoCaseOfCase, -- Don't do case-of-case transformations.
872 -- This makes full laziness work better
873 MaxSimplifierIterations max_iter
877 if opt_level == 0 then
878 [runWhen vectorisation (CoreDoPasses [ simpl_gently, CoreDoVectorisation ]),
879 simpl_phase 0 ["final"] max_iter]
880 else {- opt_level >= 1 -} [
882 -- We want to do the static argument transform before full laziness as it
883 -- may expose extra opportunities to float things outwards. However, to fix
884 -- up the output of the transformation we need at do at least one simplify
885 -- after this before anything else
886 runWhen static_args CoreDoStaticArgs,
888 -- initial simplify: mk specialiser happy: minimum effort please
891 -- We run vectorisation here for now, but we might also try to run
893 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
895 -- Specialisation is best done before full laziness
896 -- so that overloaded functions have all their dictionary lambdas manifest
899 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
905 -- Phase 0: allow all Ids to be inlined now
906 -- This gets foldr inlined before strictness analysis
908 -- At least 3 iterations because otherwise we land up with
909 -- huge dead expressions because of an infelicity in the
911 -- let k = BIG in foldr k z xs
912 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
913 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
915 simpl_phase 0 ["main"] (max max_iter 3),
918 #ifdef OLD_STRICTNESS
921 runWhen strictness (CoreDoPasses [
925 simpl_phase 0 ["post-worker-wrapper"] max_iter
928 runWhen full_laziness
929 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
930 True)), -- Float constants
931 -- nofib/spectral/hartel/wang doubles in speed if you
932 -- do full laziness late in the day. It only happens
933 -- after fusion and other stuff, so the early pass doesn't
934 -- catch it. For the record, the redex is
935 -- f_el22 (f_el21 r_midblock)
939 -- We want CSE to follow the final full-laziness pass, because it may
940 -- succeed in commoning up things floated out by full laziness.
941 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
947 -- Case-liberation for -O2. This should be after
948 -- strictness analysis and the simplification which follows it.
949 runWhen liberate_case (CoreDoPasses [
951 simpl_phase 0 ["post-liberate-case"] max_iter
952 ]), -- Run the simplifier after LiberateCase to vastly
953 -- reduce the possiblility of shadowing
954 -- Reason: see Note [Shadowing] in SpecConstr.lhs
956 runWhen spec_constr CoreDoSpecConstr,
960 -- Final clean-up simplification:
961 simpl_phase 0 ["final"] max_iter
964 -- -----------------------------------------------------------------------------
965 -- StgToDo: abstraction of stg-to-stg passes to run.
968 = StgDoMassageForProfiling -- should be (next to) last
969 -- There's also setStgVarInfo, but its absolute "lastness"
970 -- is so critical that it is hardwired in (no flag).
973 getStgToDo :: DynFlags -> [StgToDo]
975 | Just todo <- stgToDo dflags = todo -- set explicitly by user
978 stg_stats = dopt Opt_StgStats dflags
980 todo1 = if stg_stats then [D_stg_stats] else []
982 todo2 | WayProf `elem` wayNames dflags
983 = StgDoMassageForProfiling : todo1
987 -- -----------------------------------------------------------------------------
991 allFlags = map ('-':) $
992 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
993 map ("fno-"++) flags ++
997 where ok (PrefixPred _ _) = False
999 flags = map fst fFlags
1002 dynamic_flags :: [(String, OptKind DynP)]
1004 ( "n" , NoArg (setDynFlag Opt_DryRun) )
1005 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
1006 , ( "F" , NoArg (setDynFlag Opt_Pp))
1007 , ( "#include" , HasArg (addCmdlineHCInclude) )
1008 , ( "v" , OptIntSuffix setVerbosity )
1010 ------- Specific phases --------------------------------------------
1011 , ( "pgmL" , HasArg (upd . setPgmL) )
1012 , ( "pgmP" , HasArg (upd . setPgmP) )
1013 , ( "pgmF" , HasArg (upd . setPgmF) )
1014 , ( "pgmc" , HasArg (upd . setPgmc) )
1015 , ( "pgmm" , HasArg (upd . setPgmm) )
1016 , ( "pgms" , HasArg (upd . setPgms) )
1017 , ( "pgma" , HasArg (upd . setPgma) )
1018 , ( "pgml" , HasArg (upd . setPgml) )
1019 , ( "pgmdll" , HasArg (upd . setPgmdll) )
1020 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
1022 , ( "optL" , HasArg (upd . addOptL) )
1023 , ( "optP" , HasArg (upd . addOptP) )
1024 , ( "optF" , HasArg (upd . addOptF) )
1025 , ( "optc" , HasArg (upd . addOptc) )
1026 , ( "optm" , HasArg (upd . addOptm) )
1027 , ( "opta" , HasArg (upd . addOpta) )
1028 , ( "optl" , HasArg (upd . addOptl) )
1029 , ( "optdep" , HasArg (upd . addOptdep) )
1030 , ( "optwindres" , HasArg (upd . addOptwindres) )
1032 , ( "split-objs" , NoArg (if can_split
1033 then setDynFlag Opt_SplitObjs
1036 -------- Linking ----------------------------------------------------
1037 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1038 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
1039 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1040 , ( "dynload" , HasArg (upd . parseDynLibLoaderMode))
1042 ------- Libraries ---------------------------------------------------
1043 , ( "L" , Prefix addLibraryPath )
1044 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1046 ------- Frameworks --------------------------------------------------
1047 -- -framework-path should really be -F ...
1048 , ( "framework-path" , HasArg addFrameworkPath )
1049 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1051 ------- Output Redirection ------------------------------------------
1052 , ( "odir" , HasArg (upd . setObjectDir))
1053 , ( "o" , SepArg (upd . setOutputFile . Just))
1054 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1055 , ( "osuf" , HasArg (upd . setObjectSuf))
1056 , ( "hcsuf" , HasArg (upd . setHcSuf))
1057 , ( "hisuf" , HasArg (upd . setHiSuf))
1058 , ( "hidir" , HasArg (upd . setHiDir))
1059 , ( "tmpdir" , HasArg (upd . setTmpDir))
1060 , ( "stubdir" , HasArg (upd . setStubDir))
1061 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1063 ------- Keeping temporary files -------------------------------------
1064 -- These can be singular (think ghc -c) or plural (think ghc --make)
1065 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1066 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1067 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1068 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1069 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1070 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1071 -- This only makes sense as plural
1072 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1074 ------- Miscellaneous ----------------------------------------------
1075 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1076 , ( "main-is" , SepArg setMainIs )
1077 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1078 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1079 , ( "hpcdir" , SepArg setOptHpcDir )
1081 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1082 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1083 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1085 ------- Packages ----------------------------------------------------
1086 , ( "package-conf" , HasArg extraPkgConf_ )
1087 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1088 , ( "package-name" , HasArg (upd . setPackageName) )
1089 , ( "package" , HasArg exposePackage )
1090 , ( "hide-package" , HasArg hidePackage )
1091 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1092 , ( "ignore-package" , HasArg ignorePackage )
1093 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1095 ------ HsCpp opts ---------------------------------------------------
1096 , ( "D", AnySuffix (upd . addOptP) )
1097 , ( "U", AnySuffix (upd . addOptP) )
1099 ------- Include/Import Paths ----------------------------------------
1100 , ( "I" , Prefix addIncludePath)
1101 , ( "i" , OptPrefix addImportPath )
1103 ------ Debugging ----------------------------------------------------
1104 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1106 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1107 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1108 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1109 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1110 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1111 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1112 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1113 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1114 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1115 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1116 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1117 , ( "ddump-asm-regalloc-stages",
1118 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1119 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1120 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1121 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1122 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1123 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1124 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1125 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1126 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1127 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1128 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1129 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1130 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1131 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1132 , ( "ddump-simpl-phases", OptPrefix setDumpSimplPhases)
1133 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1134 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1135 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1136 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1137 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1138 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1139 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1140 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1141 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1142 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1143 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1144 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1145 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1146 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1147 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1148 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1149 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1150 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1151 , ( "dverbose-core2core", NoArg setVerboseCore2Core)
1152 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1153 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1154 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1155 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1156 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1157 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1158 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1159 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1160 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1161 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1162 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1163 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1164 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1165 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1166 setVerbosity (Just 2)) )
1167 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1169 ------ Machine dependant (-m<blah>) stuff ---------------------------
1171 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1172 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1173 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1175 ------ Warning opts -------------------------------------------------
1176 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1177 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1178 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1179 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1180 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1181 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1183 ------ Optimisation flags ------------------------------------------
1184 , ( "O" , NoArg (upd (setOptLevel 1)))
1185 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1186 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1187 -- If the number is missing, use 1
1189 , ( "fsimplifier-phases", IntSuffix (\n ->
1190 upd (\dfs -> dfs{ simplPhases = n })) )
1191 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1192 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1194 , ( "fspec-constr-threshold", IntSuffix (\n ->
1195 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1196 , ( "fno-spec-constr-threshold", NoArg (
1197 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1198 , ( "fspec-constr-count", IntSuffix (\n ->
1199 upd (\dfs -> dfs{ specConstrCount = Just n })))
1200 , ( "fno-spec-constr-count", NoArg (
1201 upd (\dfs -> dfs{ specConstrCount = Nothing })))
1202 , ( "fliberate-case-threshold", IntSuffix (\n ->
1203 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1204 , ( "fno-liberate-case-threshold", NoArg (
1205 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1207 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1208 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1210 ------ Compiler flags -----------------------------------------------
1212 , ( "fasm", NoArg (setObjTarget HscAsm) )
1213 , ( "fvia-c", NoArg (setObjTarget HscC) )
1214 , ( "fvia-C", NoArg (setObjTarget HscC) )
1216 , ( "fno-code", NoArg (setTarget HscNothing))
1217 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1218 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1220 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1221 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1223 -- the rest of the -f* and -fno-* flags
1224 , ( "f", PrefixPred (isFlag fFlags)
1225 (\f -> setDynFlag (getFlag fFlags f)) )
1226 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1227 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1229 -- the -X* and -XNo* flags
1230 , ( "X", PrefixPred (isFlag xFlags)
1231 (\f -> setDynFlag (getFlag xFlags f)) )
1232 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1233 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1236 -- these -f<blah> flags can all be reversed with -fno-<blah>
1238 fFlags :: [(String, DynFlag)]
1240 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1241 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1242 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1243 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1244 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1245 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1246 ( "warn-missing-fields", Opt_WarnMissingFields ),
1247 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1248 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1249 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1250 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1251 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1252 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1253 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1254 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1255 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1256 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1257 ( "warn-deprecations", Opt_WarnDeprecations ),
1258 ( "warn-orphans", Opt_WarnOrphans ),
1259 ( "warn-tabs", Opt_WarnTabs ),
1260 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1261 ( "strictness", Opt_Strictness ),
1262 ( "static-argument-transformation", Opt_StaticArgumentTransformation ),
1263 ( "full-laziness", Opt_FullLaziness ),
1264 ( "liberate-case", Opt_LiberateCase ),
1265 ( "spec-constr", Opt_SpecConstr ),
1267 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1268 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1269 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1270 ( "ignore-asserts", Opt_IgnoreAsserts ),
1271 ( "do-eta-reduction", Opt_DoEtaReduction ),
1272 ( "case-merge", Opt_CaseMerge ),
1273 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1274 ( "dicts-cheap", Opt_DictsCheap ),
1275 ( "excess-precision", Opt_ExcessPrecision ),
1276 ( "asm-mangling", Opt_DoAsmMangling ),
1277 ( "print-bind-result", Opt_PrintBindResult ),
1278 ( "force-recomp", Opt_ForceRecomp ),
1279 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1280 ( "rewrite-rules", Opt_RewriteRules ),
1281 ( "break-on-exception", Opt_BreakOnException ),
1282 ( "break-on-error", Opt_BreakOnError ),
1283 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1284 ( "print-bind-contents", Opt_PrintBindContents ),
1285 ( "run-cps", Opt_RunCPSZ ),
1286 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1287 ( "vectorise", Opt_Vectorise ),
1288 ( "regs-graph", Opt_RegsGraph),
1289 ( "regs-iterative", Opt_RegsIterative),
1290 -- Deprecated in favour of -XTemplateHaskell:
1291 ( "th", Opt_TemplateHaskell ),
1292 -- Deprecated in favour of -XForeignFunctionInterface:
1293 ( "fi", Opt_ForeignFunctionInterface ),
1294 -- Deprecated in favour of -XForeignFunctionInterface:
1295 ( "ffi", Opt_ForeignFunctionInterface ),
1296 -- Deprecated in favour of -XArrows:
1297 ( "arrows", Opt_Arrows ),
1298 -- Deprecated in favour of -XGenerics:
1299 ( "generics", Opt_Generics ),
1300 -- Deprecated in favour of -XImplicitPrelude:
1301 ( "implicit-prelude", Opt_ImplicitPrelude ),
1302 -- Deprecated in favour of -XBangPatterns:
1303 ( "bang-patterns", Opt_BangPatterns ),
1304 -- Deprecated in favour of -XMonomorphismRestriction:
1305 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1306 -- Deprecated in favour of -XMonoPatBinds:
1307 ( "mono-pat-binds", Opt_MonoPatBinds ),
1308 -- Deprecated in favour of -XExtendedDefaultRules:
1309 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1310 -- Deprecated in favour of -XImplicitParams:
1311 ( "implicit-params", Opt_ImplicitParams ),
1312 -- Deprecated in favour of -XScopedTypeVariables:
1313 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1314 -- Deprecated in favour of -XPArr:
1315 ( "parr", Opt_PArr ),
1316 -- Deprecated in favour of -XOverlappingInstances:
1317 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1318 -- Deprecated in favour of -XUndecidableInstances:
1319 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1320 -- Deprecated in favour of -XIncoherentInstances:
1321 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1322 ( "gen-manifest", Opt_GenManifest ),
1323 ( "embed-manifest", Opt_EmbedManifest )
1326 supportedLanguages :: [String]
1327 supportedLanguages = map fst xFlags
1329 -- These -X<blah> flags can all be reversed with -XNo<blah>
1330 xFlags :: [(String, DynFlag)]
1333 ( "PatternGuards", Opt_PatternGuards ),
1334 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1335 ( "MagicHash", Opt_MagicHash ),
1336 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1337 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1338 ( "KindSignatures", Opt_KindSignatures ),
1339 ( "PatternSignatures", Opt_PatternSignatures ),
1340 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1341 ( "ParallelListComp", Opt_ParallelListComp ),
1342 ( "TransformListComp", Opt_TransformListComp ),
1343 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1344 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1345 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1346 ( "Rank2Types", Opt_Rank2Types ),
1347 ( "RankNTypes", Opt_RankNTypes ),
1348 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1349 ( "TypeOperators", Opt_TypeOperators ),
1350 ( "RecursiveDo", Opt_RecursiveDo ),
1351 ( "Arrows", Opt_Arrows ),
1352 ( "PArr", Opt_PArr ),
1353 ( "TemplateHaskell", Opt_TemplateHaskell ),
1354 ( "QuasiQuotes", Opt_QuasiQuotes ),
1355 ( "Generics", Opt_Generics ),
1357 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1358 ( "RecordWildCards", Opt_RecordWildCards ),
1359 ( "RecordPuns", Opt_RecordPuns ),
1360 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1361 ( "OverloadedStrings", Opt_OverloadedStrings ),
1362 ( "GADTs", Opt_GADTs ),
1363 ( "ViewPatterns", Opt_ViewPatterns),
1364 ( "TypeFamilies", Opt_TypeFamilies ),
1365 ( "BangPatterns", Opt_BangPatterns ),
1367 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1368 -- On by default (which is not strictly H98):
1369 ( "MonoPatBinds", Opt_MonoPatBinds ),
1370 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1371 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1372 ( "ImplicitParams", Opt_ImplicitParams ),
1373 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1374 ( "UnboxedTuples", Opt_UnboxedTuples ),
1375 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1376 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1377 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1378 ( "FlexibleContexts", Opt_FlexibleContexts ),
1379 ( "FlexibleInstances", Opt_FlexibleInstances ),
1380 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1381 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1382 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1383 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1384 ( "OverlappingInstances", Opt_OverlappingInstances ),
1385 ( "UndecidableInstances", Opt_UndecidableInstances ),
1386 ( "IncoherentInstances", Opt_IncoherentInstances )
1389 impliedFlags :: [(DynFlag, [DynFlag])]
1391 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1392 -- be completely rigid for GADTs
1393 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1394 -- Note [Scoped tyvars] in TcBinds
1397 glasgowExtsFlags :: [DynFlag]
1398 glasgowExtsFlags = [
1399 Opt_PrintExplicitForalls
1400 , Opt_ForeignFunctionInterface
1401 , Opt_UnliftedFFITypes
1403 , Opt_ImplicitParams
1404 , Opt_ScopedTypeVariables
1406 , Opt_TypeSynonymInstances
1407 , Opt_StandaloneDeriving
1408 , Opt_DeriveDataTypeable
1409 , Opt_FlexibleContexts
1410 , Opt_FlexibleInstances
1411 , Opt_ConstrainedClassMethods
1412 , Opt_MultiParamTypeClasses
1413 , Opt_FunctionalDependencies
1415 , Opt_PolymorphicComponents
1416 , Opt_ExistentialQuantification
1419 , Opt_LiberalTypeSynonyms
1421 , Opt_ImpredicativeTypes
1424 , Opt_ParallelListComp
1425 , Opt_EmptyDataDecls
1426 , Opt_KindSignatures
1427 , Opt_PatternSignatures
1428 , Opt_GeneralizedNewtypeDeriving
1429 , Opt_TypeFamilies ]
1432 isFlag :: [(String,a)] -> String -> Bool
1433 isFlag flags f = any (\(ff,_) -> ff == f) flags
1435 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1436 isPrefFlag pref flags no_f
1437 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1441 getFlag :: [(String,a)] -> String -> a
1442 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1444 [] -> panic ("get_flag " ++ f)
1446 getPrefFlag :: String -> [(String,a)] -> String -> a
1447 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1448 -- We should only be passed flags which match the prefix
1450 -- -----------------------------------------------------------------------------
1451 -- Parsing the dynamic flags.
1453 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1454 parseDynamicFlags dflags args = do
1455 let ((leftover,errs),dflags')
1456 = runCmdLine (processArgs dynamic_flags args) dflags
1457 when (not (null errs)) $ do
1458 throwDyn (UsageError (unlines errs))
1459 return (dflags', leftover)
1462 type DynP = CmdLineP DynFlags
1464 upd :: (DynFlags -> DynFlags) -> DynP ()
1466 dfs <- getCmdLineState
1467 putCmdLineState $! (f dfs)
1469 --------------------------
1470 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1471 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1473 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1474 -- When you set f, set the ones it implies
1475 -- When you un-set f, however, we don't un-set the things it implies
1476 -- (except for -fno-glasgow-exts, which is treated specially)
1478 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1480 --------------------------
1481 setDumpFlag :: DynFlag -> OptKind DynP
1482 setDumpFlag dump_flag
1483 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1484 -- Whenver we -ddump, switch off the recompilation checker,
1485 -- else you don't see the dump!
1487 setVerboseCore2Core :: DynP ()
1488 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1489 setDynFlag Opt_D_verbose_core2core
1490 upd (\s -> s { shouldDumpSimplPhase = const True })
1492 setDumpSimplPhases :: String -> DynP ()
1493 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1494 upd (\s -> s { shouldDumpSimplPhase = spec })
1496 spec :: SimplifierMode -> Bool
1498 . map (join (&&) . map match . split ':')
1504 join :: (Bool -> Bool -> Bool)
1505 -> [SimplifierMode -> Bool]
1506 -> SimplifierMode -> Bool
1507 join _ [] = const True
1508 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1510 match :: String -> SimplifierMode -> Bool
1511 match "" = const True
1512 match s = case reads s of
1513 [(n,"")] -> phase_num n
1516 phase_num :: Int -> SimplifierMode -> Bool
1517 phase_num n (SimplPhase k _) = n == k
1518 phase_num _ _ = False
1520 phase_name :: String -> SimplifierMode -> Bool
1521 phase_name s SimplGently = s == "gentle"
1522 phase_name s (SimplPhase _ ss) = s `elem` ss
1524 setVerbosity :: Maybe Int -> DynP ()
1525 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1527 addCmdlineHCInclude :: String -> DynP ()
1528 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1530 extraPkgConf_ :: FilePath -> DynP ()
1531 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1533 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1535 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1537 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1539 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1541 setPackageName :: String -> DynFlags -> DynFlags
1543 | Nothing <- unpackPackageId pid
1544 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1546 = \s -> s{ thisPackage = pid }
1548 pid = stringToPackageId p
1550 -- If we're linking a binary, then only targets that produce object
1551 -- code are allowed (requests for other target types are ignored).
1552 setTarget :: HscTarget -> DynP ()
1553 setTarget l = upd set
1556 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1559 -- Changes the target only if we're compiling object code. This is
1560 -- used by -fasm and -fvia-C, which switch from one to the other, but
1561 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1562 -- can be safely used in an OPTIONS_GHC pragma.
1563 setObjTarget :: HscTarget -> DynP ()
1564 setObjTarget l = upd set
1567 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1570 setOptLevel :: Int -> DynFlags -> DynFlags
1571 setOptLevel n dflags
1572 | hscTarget dflags == HscInterpreted && n > 0
1574 -- not in IO any more, oh well:
1575 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1577 = updOptLevel n dflags
1580 setMainIs :: String -> DynP ()
1582 | not (null main_fn) && isLower (head main_fn)
1583 -- The arg looked like "Foo.Bar.baz"
1584 = upd $ \d -> d{ mainFunIs = Just main_fn,
1585 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1587 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1588 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1590 | otherwise -- The arg looked like "baz"
1591 = upd $ \d -> d{ mainFunIs = Just arg }
1593 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1595 -----------------------------------------------------------------------------
1596 -- Paths & Libraries
1598 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1600 -- -i on its own deletes the import paths
1601 addImportPath "" = upd (\s -> s{importPaths = []})
1602 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1606 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1609 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1611 addFrameworkPath p =
1612 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1614 #ifndef mingw32_TARGET_OS
1615 split_marker :: Char
1616 split_marker = ':' -- not configurable (ToDo)
1619 splitPathList :: String -> [String]
1620 splitPathList s = filter notNull (splitUp s)
1621 -- empty paths are ignored: there might be a trailing
1622 -- ':' in the initial list, for example. Empty paths can
1623 -- cause confusion when they are translated into -I options
1624 -- for passing to gcc.
1626 #ifndef mingw32_TARGET_OS
1627 splitUp xs = split split_marker xs
1629 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1631 -- That is, if "foo:bar:baz" is used, this interpreted as
1632 -- consisting of three entries, 'foo', 'bar', 'baz'.
1633 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1634 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1636 -- Notice that no attempt is made to fully replace the 'standard'
1637 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1638 -- that this will cause too much breakage for users & ':' will
1639 -- work fine even with DOS paths, if you're not insisting on being silly.
1642 splitUp (x:':':div:xs) | div `elem` dir_markers
1643 = ((x:':':div:p): splitUp rs)
1645 (p,rs) = findNextPath xs
1646 -- we used to check for existence of the path here, but that
1647 -- required the IO monad to be threaded through the command-line
1648 -- parser which is quite inconvenient. The
1649 splitUp xs = cons p (splitUp rs)
1651 (p,rs) = findNextPath xs
1656 -- will be called either when we've consumed nought or the
1657 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1658 -- finding the next split marker.
1660 case break (`elem` split_markers) xs of
1661 (p, _:ds) -> (p, ds)
1664 split_markers :: [Char]
1665 split_markers = [':', ';']
1667 dir_markers :: [Char]
1668 dir_markers = ['/', '\\']
1671 -- -----------------------------------------------------------------------------
1672 -- tmpDir, where we store temporary files.
1674 setTmpDir :: FilePath -> DynFlags -> DynFlags
1675 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1676 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1677 -- seem necessary now --SDM 7/2/2008
1679 -----------------------------------------------------------------------------
1682 setOptHpcDir :: String -> DynP ()
1683 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1685 -----------------------------------------------------------------------------
1686 -- Via-C compilation stuff
1688 -- There are some options that we need to pass to gcc when compiling
1689 -- Haskell code via C, but are only supported by recent versions of
1690 -- gcc. The configure script decides which of these options we need,
1691 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1692 -- read before each via-C compilation. The advantage of having these
1693 -- in a separate file is that the file can be created at install-time
1694 -- depending on the available gcc version, and even re-generated later
1695 -- if gcc is upgraded.
1697 -- The options below are not dependent on the version of gcc, only the
1700 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1701 [String]) -- for registerised HC compilations
1702 machdepCCOpts _dflags
1703 #if alpha_TARGET_ARCH
1705 #ifdef HAVE_THREADED_RTS_SUPPORT
1709 -- For now, to suppress the gcc warning "call-clobbered
1710 -- register used for global register variable", we simply
1711 -- disable all warnings altogether using the -w flag. Oh well.
1713 #elif hppa_TARGET_ARCH
1714 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1715 -- (very nice, but too bad the HP /usr/include files don't agree.)
1716 = ( ["-D_HPUX_SOURCE"], [] )
1718 #elif m68k_TARGET_ARCH
1719 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1720 -- popping of args to routines to be explicit; if we let things
1721 -- be deferred 'til after an STGJUMP, imminent death is certain!
1723 -- -fomit-frame-pointer : *don't*
1724 -- It's better to have a6 completely tied up being a frame pointer
1725 -- rather than let GCC pick random things to do with it.
1726 -- (If we want to steal a6, then we would try to do things
1727 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1728 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1730 #elif i386_TARGET_ARCH
1731 -- -fno-defer-pop : basically the same game as for m68k
1733 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1734 -- the fp (%ebp) for our register maps.
1735 = let n_regs = stolen_x86_regs _dflags
1738 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1739 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1742 "-fomit-frame-pointer",
1743 -- we want -fno-builtin, because when gcc inlines
1744 -- built-in functions like memcpy() it tends to
1745 -- run out of registers, requiring -monly-n-regs
1747 "-DSTOLEN_X86_REGS="++show n_regs ]
1750 #elif ia64_TARGET_ARCH
1751 = ( [], ["-fomit-frame-pointer", "-G0"] )
1753 #elif x86_64_TARGET_ARCH
1754 = ( [], ["-fomit-frame-pointer",
1755 "-fno-asynchronous-unwind-tables",
1756 -- the unwind tables are unnecessary for HC code,
1757 -- and get in the way of -split-objs. Another option
1758 -- would be to throw them away in the mangler, but this
1761 -- calling builtins like strlen() using the FFI can
1762 -- cause gcc to run out of regs, so use the external
1766 #elif sparc_TARGET_ARCH
1768 -- For now, to suppress the gcc warning "call-clobbered
1769 -- register used for global register variable", we simply
1770 -- disable all warnings altogether using the -w flag. Oh well.
1772 #elif powerpc_apple_darwin_TARGET
1774 -- Disable Apple's precompiling preprocessor. It's a great thing
1775 -- for "normal" programs, but it doesn't support register variable
1777 = ( [], ["-no-cpp-precomp"] )
1782 picCCOpts :: DynFlags -> [String]
1784 #if darwin_TARGET_OS
1785 -- Apple prefers to do things the other way round.
1786 -- PIC is on by default.
1787 -- -mdynamic-no-pic:
1788 -- Turn off PIC code generation.
1790 -- Don't generate "common" symbols - these are unwanted
1791 -- in dynamic libraries.
1794 = ["-fno-common", "-D__PIC__"]
1796 = ["-mdynamic-no-pic"]
1797 #elif mingw32_TARGET_OS
1798 -- no -fPIC for Windows
1805 = ["-fPIC", "-D__PIC__"]
1810 -- -----------------------------------------------------------------------------
1814 can_split = cSplitObjs == "YES"
1816 -- -----------------------------------------------------------------------------
1819 compilerInfo :: [(String, String)]
1820 compilerInfo = [("Project name", cProjectName),
1821 ("Project version", cProjectVersion),
1822 ("Booter version", cBooterVersion),
1824 ("Interface file version", cHscIfaceFileVersion),
1825 ("Have interpreter", cGhcWithInterpreter),
1826 ("Object splitting", cSplitObjs),
1827 ("Have native code generator", cGhcWithNativeCodeGen),
1828 ("Support SMP", cGhcWithSMP),
1829 ("Unregisterised", cGhcUnregisterised),
1830 ("Tables next to code", cGhcEnableTablesNextToCode),
1831 ("Win32 DLLs", cEnableWin32DLLs),
1832 ("RTS ways", cGhcRTSWays),
1833 ("Leading underscore", cLeadingUnderscore)]