2 {-# OPTIONS -fno-warn-missing-fields #-}
4 -- The above warning supression flag is a temporary kludge.
5 -- While working on this module you are encouraged to remove it and fix
6 -- any warnings in the module. See
7 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
10 -----------------------------------------------------------------------------
14 -- Most flags are dynamic flags, which means they can change from
15 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
16 -- multi-session GHC each session can be using different dynamic
17 -- flags. Dynamic flags can also be set at the prompt in GHCi.
19 -- (c) The University of Glasgow 2005
21 -----------------------------------------------------------------------------
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
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 )
89 #ifdef mingw32_TARGET_OS
90 import Data.List ( isPrefixOf )
96 import System.IO ( hPutStrLn, stderr )
98 -- -----------------------------------------------------------------------------
106 | Opt_D_dump_cmmz_pretty
110 | Opt_D_dump_asm_native
111 | Opt_D_dump_asm_liveness
112 | Opt_D_dump_asm_coalesce
113 | Opt_D_dump_asm_regalloc
114 | Opt_D_dump_asm_regalloc_stages
115 | Opt_D_dump_asm_conflicts
116 | Opt_D_dump_asm_stats
122 | Opt_D_dump_inlinings
123 | Opt_D_dump_rule_firings
124 | Opt_D_dump_occur_anal
128 | Opt_D_dump_simpl_iterations
129 | Opt_D_dump_simpl_phases
138 | Opt_D_dump_worker_wrapper
139 | Opt_D_dump_rn_trace
140 | Opt_D_dump_rn_stats
142 | Opt_D_dump_simpl_stats
143 | Opt_D_dump_tc_trace
144 | Opt_D_dump_if_trace
150 | Opt_D_verbose_core2core
151 | Opt_D_verbose_stg2stg
153 | Opt_D_dump_hi_diffs
154 | Opt_D_dump_minimal_imports
155 | Opt_D_dump_mod_cycles
156 | Opt_D_dump_view_pattern_commoning
157 | Opt_D_faststring_stats
158 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
164 | Opt_WarnIsError -- -Werror; makes warnings fatal
165 | Opt_WarnDuplicateExports
167 | Opt_WarnImplicitPrelude
168 | Opt_WarnIncompletePatterns
169 | Opt_WarnIncompletePatternsRecUpd
170 | Opt_WarnMissingFields
171 | Opt_WarnMissingMethods
172 | Opt_WarnMissingSigs
173 | Opt_WarnNameShadowing
174 | Opt_WarnOverlappingPatterns
175 | Opt_WarnSimplePatterns
176 | Opt_WarnTypeDefaults
177 | Opt_WarnMonomorphism
178 | Opt_WarnUnusedBinds
179 | Opt_WarnUnusedImports
180 | Opt_WarnUnusedMatches
181 | Opt_WarnDeprecations
182 | Opt_WarnDodgyImports
187 | Opt_OverlappingInstances
188 | Opt_UndecidableInstances
189 | Opt_IncoherentInstances
190 | Opt_MonomorphismRestriction
192 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
193 | Opt_ForeignFunctionInterface
194 | Opt_UnliftedFFITypes
195 | Opt_PArr -- Syntactic support for parallel arrays
196 | Opt_Arrows -- Arrow-notation syntax
197 | Opt_TemplateHaskell
200 | Opt_ImplicitPrelude
201 | Opt_ScopedTypeVariables
205 | Opt_OverloadedStrings
206 | Opt_DisambiguateRecordFields
207 | Opt_RecordWildCards
212 | Opt_StandaloneDeriving
213 | Opt_DeriveDataTypeable
214 | Opt_TypeSynonymInstances
215 | Opt_FlexibleContexts
216 | Opt_FlexibleInstances
217 | Opt_ConstrainedClassMethods
218 | Opt_MultiParamTypeClasses
219 | Opt_FunctionalDependencies
221 | Opt_PolymorphicComponents
222 | Opt_ExistentialQuantification
226 | Opt_PatternSignatures
227 | Opt_ParallelListComp
228 | Opt_GeneralizedNewtypeDeriving
231 | Opt_LiberalTypeSynonyms
236 | Opt_PrintExplicitForalls
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 maxSimplIterations :: Int, -- max simplifier iterations
302 ruleCheck :: Maybe String,
304 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
305 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
307 stolen_x86_regs :: Int,
308 cmdlineHcIncludes :: [String], -- -#includes
309 importPaths :: [FilePath],
311 mainFunIs :: Maybe String,
312 ctxtStkDepth :: Int, -- Typechecker context stack depth
314 thisPackage :: PackageId,
317 wayNames :: [WayName], -- way flags from the cmd line
318 buildTag :: String, -- the global "way" (eg. "p" for prof)
319 rtsBuildTag :: String, -- the RTS "way"
322 objectDir :: Maybe String,
323 hiDir :: Maybe String,
324 stubDir :: Maybe String,
330 outputFile :: Maybe String,
331 outputHi :: Maybe String,
333 -- | This is set by DriverPipeline.runPipeline based on where
334 -- its output is going.
335 dumpPrefix :: Maybe FilePath,
337 -- | Override the dumpPrefix set by runPipeline.
338 -- Set by -ddump-file-prefix
339 dumpPrefixForce :: Maybe FilePath,
341 includePaths :: [String],
342 libraryPaths :: [String],
343 frameworkPaths :: [String], -- used on darwin only
344 cmdlineFrameworks :: [String], -- ditto
345 tmpDir :: String, -- no trailing '/'
347 ghcUsagePath :: FilePath, -- Filled in by SysTools
348 ghciUsagePath :: FilePath, -- ditto
350 hpcDir :: String, -- ^ path to store the .mix files
352 -- options for particular phases
361 opt_windres :: [String],
363 -- commands for particular phases
365 pgm_P :: (String,[Option]),
367 pgm_c :: (String,[Option]),
368 pgm_m :: (String,[Option]),
369 pgm_s :: (String,[Option]),
370 pgm_a :: (String,[Option]),
371 pgm_l :: (String,[Option]),
372 pgm_dll :: (String,[Option]),
374 pgm_sysman :: String,
375 pgm_windres :: String,
378 extraPkgConfs :: [FilePath],
379 topDir :: FilePath, -- filled in by SysTools
380 systemPackageConfig :: FilePath, -- ditto
381 -- The -package-conf flags given on the command line, in the order
384 packageFlags :: [PackageFlag],
385 -- The -package and -hide-package flags from the command-line
388 -- NB. do not modify this field, it is calculated by
389 -- Packages.initPackages and Packages.updatePackages.
390 pkgDatabase :: Maybe (UniqFM PackageConfig),
391 pkgState :: PackageState,
397 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
399 haddockOptions :: Maybe String
410 -- | will this target result in an object file on the disk?
411 isObjectTarget :: HscTarget -> Bool
412 isObjectTarget HscC = True
413 isObjectTarget HscAsm = True
414 isObjectTarget _ = False
416 -- | The 'GhcMode' tells us whether we're doing multi-module
417 -- compilation (controlled via the "GHC" API) or one-shot
418 -- (single-module) compilation. This makes a difference primarily to
419 -- the "Finder": in one-shot mode we look for interface files for
420 -- imported modules, but in multi-module mode we look for source files
421 -- in order to check whether they need to be recompiled.
423 = CompManager -- ^ --make, GHCi, etc.
424 | OneShot -- ^ ghc -c Foo.hs
425 | MkDepend -- ^ ghc -M, see Finder for why we need this
428 isOneShot :: GhcMode -> Bool
429 isOneShot OneShot = True
430 isOneShot _other = False
432 -- | What kind of linking to do.
433 data GhcLink -- What to do in the link step, if there is one
434 = NoLink -- Don't link at all
435 | LinkBinary -- Link object code into a binary
436 | LinkInMemory -- Use the in-memory dynamic linker
437 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
440 isNoLink :: GhcLink -> Bool
441 isNoLink NoLink = True
442 isNoLink other = False
445 = ExposePackage String
447 | IgnorePackage String
450 defaultHscTarget = defaultObjectTarget
452 -- | the 'HscTarget' value corresponding to the default way to create
453 -- object files on the current platform.
455 | cGhcWithNativeCodeGen == "YES" = HscAsm
458 initDynFlags dflags = do
459 -- someday these will be dynamic flags
460 ways <- readIORef v_Ways
461 build_tag <- readIORef v_Build_tag
462 rts_build_tag <- readIORef v_RTS_Build_tag
465 buildTag = build_tag,
466 rtsBuildTag = rts_build_tag
471 ghcMode = CompManager,
472 ghcLink = LinkBinary,
475 hscTarget = defaultHscTarget,
480 maxSimplIterations = 4,
482 specConstrThreshold = Just 200,
483 liberateCaseThreshold = Just 200,
485 cmdlineHcIncludes = [],
489 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
491 thisPackage = mainPackageId,
497 objectSuf = phaseInputExt StopLn,
498 hcSuf = phaseInputExt HCc,
501 outputFile = Nothing,
503 dumpPrefix = Nothing,
504 dumpPrefixForce = Nothing,
508 cmdlineFrameworks = [],
509 tmpDir = cDEFAULT_TMPDIR,
527 pkgDatabase = Nothing,
528 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
529 haddockOptions = Nothing,
531 Opt_ReadUserPackageConf,
533 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
534 -- behaviour the default, to see if anyone notices
538 Opt_MonomorphismRestriction,
544 Opt_PrintBindContents
546 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
547 -- The default -O0 options
550 log_action = \severity srcSpan style msg ->
552 SevInfo -> hPutStrLn stderr (show (msg style))
553 SevFatal -> hPutStrLn stderr (show (msg style))
554 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
560 0 | print errors & warnings only
561 1 | minimal verbosity: print "compiling M ... done." for each module.
562 2 | equivalent to -dshow-passes
563 3 | equivalent to existing "ghc -v"
564 4 | "ghc -v -ddump-most"
565 5 | "ghc -v -ddump-all"
568 dopt :: DynFlag -> DynFlags -> Bool
569 dopt f dflags = f `elem` (flags dflags)
571 dopt_set :: DynFlags -> DynFlag -> DynFlags
572 dopt_set dfs f = dfs{ flags = f : flags dfs }
574 dopt_unset :: DynFlags -> DynFlag -> DynFlags
575 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
577 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
578 getOpts dflags opts = reverse (opts dflags)
579 -- We add to the options from the front, so we need to reverse the list
581 getVerbFlag :: DynFlags -> String
583 | verbosity dflags >= 3 = "-v"
586 setObjectDir f d = d{ objectDir = Just f}
587 setHiDir f d = d{ hiDir = Just f}
588 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
589 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
590 -- #included from the .hc file when compiling with -fvia-C.
592 setObjectSuf f d = d{ objectSuf = f}
593 setHiSuf f d = d{ hiSuf = f}
594 setHcSuf f d = d{ hcSuf = f}
596 setOutputFile f d = d{ outputFile = f}
597 setOutputHi f d = d{ outputHi = f}
599 setDumpPrefixForce f d = d { dumpPrefixForce = f}
601 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
602 -- Config.hs should really use Option.
603 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
605 setPgmL f d = d{ pgm_L = f}
606 setPgmF f d = d{ pgm_F = f}
607 setPgmc f d = d{ pgm_c = (f,[])}
608 setPgmm f d = d{ pgm_m = (f,[])}
609 setPgms f d = d{ pgm_s = (f,[])}
610 setPgma f d = d{ pgm_a = (f,[])}
611 setPgml f d = d{ pgm_l = (f,[])}
612 setPgmdll f d = d{ pgm_dll = (f,[])}
613 setPgmwindres f d = d{ pgm_windres = f}
615 addOptL f d = d{ opt_L = f : opt_L d}
616 addOptP f d = d{ opt_P = f : opt_P d}
617 addOptF f d = d{ opt_F = f : opt_F d}
618 addOptc f d = d{ opt_c = f : opt_c d}
619 addOptm f d = d{ opt_m = f : opt_m d}
620 addOpta f d = d{ opt_a = f : opt_a d}
621 addOptl f d = d{ opt_l = f : opt_l d}
622 addOptdep f d = d{ opt_dep = f : opt_dep d}
623 addOptwindres f d = d{ opt_windres = f : opt_windres d}
625 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
627 addHaddockOpts f d = d{ haddockOptions = Just f}
629 -- -----------------------------------------------------------------------------
630 -- Command-line options
632 -- When invoking external tools as part of the compilation pipeline, we
633 -- pass these a sequence of options on the command-line. Rather than
634 -- just using a list of Strings, we use a type that allows us to distinguish
635 -- between filepaths and 'other stuff'. [The reason being, of course, that
636 -- this type gives us a handle on transforming filenames, and filenames only,
637 -- to whatever format they're expected to be on a particular platform.]
640 = FileOption -- an entry that _contains_ filename(s) / filepaths.
641 String -- a non-filepath prefix that shouldn't be
642 -- transformed (e.g., "/out=")
643 String -- the filepath/filename portion
646 -----------------------------------------------------------------------------
647 -- Setting the optimisation level
649 updOptLevel :: Int -> DynFlags -> DynFlags
650 -- Set dynflags appropriate to the optimisation level
652 = dfs2{ optLevel = final_n }
654 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
655 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
656 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
658 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
659 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
661 optLevelFlags :: [([Int], DynFlag)]
663 = [ ([0], Opt_IgnoreInterfacePragmas)
664 , ([0], Opt_OmitInterfacePragmas)
666 , ([1,2], Opt_IgnoreAsserts)
667 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
669 , ([1,2], Opt_DoEtaReduction)
670 , ([1,2], Opt_CaseMerge)
671 , ([1,2], Opt_Strictness)
673 , ([1,2], Opt_FullLaziness)
675 , ([2], Opt_LiberateCase)
676 , ([2], Opt_SpecConstr)
678 , ([0,1,2], Opt_DoLambdaEtaExpansion)
679 -- This one is important for a tiresome reason:
680 -- we want to make sure that the bindings for data
681 -- constructors are eta-expanded. This is probably
682 -- a good thing anyway, but it seems fragile.
685 -- -----------------------------------------------------------------------------
686 -- Standard sets of warning options
689 = [ Opt_WarnDeprecations,
690 Opt_WarnOverlappingPatterns,
691 Opt_WarnMissingFields,
692 Opt_WarnMissingMethods,
693 Opt_WarnDuplicateExports
697 = standardWarnings ++
698 [ Opt_WarnUnusedBinds,
699 Opt_WarnUnusedMatches,
700 Opt_WarnUnusedImports,
701 Opt_WarnIncompletePatterns,
707 [ Opt_WarnTypeDefaults,
708 Opt_WarnNameShadowing,
714 -- minuswRemovesOpts should be every warning option
717 [Opt_WarnImplicitPrelude,
718 Opt_WarnIncompletePatternsRecUpd,
719 Opt_WarnSimplePatterns,
720 Opt_WarnMonomorphism,
724 -- -----------------------------------------------------------------------------
725 -- CoreToDo: abstraction of core-to-core passes to run.
727 data CoreToDo -- These are diff core-to-core passes,
728 -- which may be invoked in any order,
729 -- as many times as you like.
731 = CoreDoSimplify -- The core-to-core simplifier.
734 -- Each run of the simplifier can take a different
735 -- set of simplifier-specific flags.
737 | CoreDoFloatOutwards FloatOutSwitches
742 | CoreDoWorkerWrapper
745 | CoreDoOldStrictness
748 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
749 -- matching this string
750 | CoreDoVectorisation
751 | CoreDoNothing -- Useful when building up
752 | CoreDoPasses [CoreToDo] -- lists of these things
754 data SimplifierMode -- See comments in SimplMonad
758 data SimplifierSwitch
759 = MaxSimplifierIterations Int
762 data FloatOutSwitches
763 = FloatOutSw Bool -- True <=> float lambdas to top level
764 Bool -- True <=> float constants to top level,
765 -- even if they do not escape a lambda
768 -- The core-to-core pass ordering is derived from the DynFlags:
769 runWhen :: Bool -> CoreToDo -> CoreToDo
770 runWhen True do_this = do_this
771 runWhen False do_this = CoreDoNothing
773 getCoreToDo :: DynFlags -> [CoreToDo]
775 | Just todo <- coreToDo dflags = todo -- set explicitly by user
776 | otherwise = core_todo
778 opt_level = optLevel dflags
779 max_iter = maxSimplIterations dflags
780 strictness = dopt Opt_Strictness dflags
781 full_laziness = dopt Opt_FullLaziness dflags
782 cse = dopt Opt_CSE dflags
783 spec_constr = dopt Opt_SpecConstr dflags
784 liberate_case = dopt Opt_LiberateCase dflags
785 rule_check = ruleCheck dflags
786 vectorisation = dopt Opt_Vectorise dflags
789 if opt_level == 0 then
791 CoreDoSimplify (SimplPhase 0) [
792 MaxSimplifierIterations max_iter
795 else {- opt_level >= 1 -} [
797 -- initial simplify: mk specialiser happy: minimum effort please
798 CoreDoSimplify SimplGently [
800 -- Don't inline anything till full laziness has bitten
801 -- In particular, inlining wrappers inhibits floating
802 -- e.g. ...(case f x of ...)...
803 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
804 -- ==> ...(case x of I# x# -> case fw x# of ...)...
805 -- and now the redex (f x) isn't floatable any more
806 -- Similarly, don't apply any rules until after full
807 -- laziness. Notably, list fusion can prevent floating.
809 NoCaseOfCase, -- Don't do case-of-case transformations.
810 -- This makes full laziness work better
811 MaxSimplifierIterations max_iter
815 -- We run vectorisation here for now, but we might also try to run
817 runWhen vectorisation (CoreDoPasses [
819 CoreDoSimplify SimplGently
821 MaxSimplifierIterations max_iter]]),
823 -- Specialisation is best done before full laziness
824 -- so that overloaded functions have all their dictionary lambdas manifest
827 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
831 CoreDoSimplify (SimplPhase 2) [
832 -- Want to run with inline phase 2 after the specialiser to give
833 -- maximum chance for fusion to work before we inline build/augment
834 -- in phase 1. This made a difference in 'ansi' where an
835 -- overloaded function wasn't inlined till too late.
836 MaxSimplifierIterations max_iter
838 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
840 CoreDoSimplify (SimplPhase 1) [
841 -- Need inline-phase2 here so that build/augment get
842 -- inlined. I found that spectral/hartel/genfft lost some useful
843 -- strictness in the function sumcode' if augment is not inlined
844 -- before strictness analysis runs
845 MaxSimplifierIterations max_iter
847 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
849 CoreDoSimplify (SimplPhase 0) [
850 -- Phase 0: allow all Ids to be inlined now
851 -- This gets foldr inlined before strictness analysis
853 MaxSimplifierIterations (max max_iter 3)
854 -- At least 3 iterations because otherwise we land up with
855 -- huge dead expressions because of an infelicity in the
857 -- let k = BIG in foldr k z xs
858 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
859 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
863 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
865 #ifdef OLD_STRICTNESS
868 runWhen strictness (CoreDoPasses [
872 CoreDoSimplify (SimplPhase 0) [
873 MaxSimplifierIterations max_iter
876 runWhen full_laziness
877 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
878 True)), -- Float constants
879 -- nofib/spectral/hartel/wang doubles in speed if you
880 -- do full laziness late in the day. It only happens
881 -- after fusion and other stuff, so the early pass doesn't
882 -- catch it. For the record, the redex is
883 -- f_el22 (f_el21 r_midblock)
887 -- We want CSE to follow the final full-laziness pass, because it may
888 -- succeed in commoning up things floated out by full laziness.
889 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
893 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
895 -- Case-liberation for -O2. This should be after
896 -- strictness analysis and the simplification which follows it.
897 runWhen liberate_case (CoreDoPasses [
899 CoreDoSimplify (SimplPhase 0) [
900 MaxSimplifierIterations max_iter
901 ] ]), -- Run the simplifier after LiberateCase to vastly
902 -- reduce the possiblility of shadowing
903 -- Reason: see Note [Shadowing] in SpecConstr.lhs
905 runWhen spec_constr CoreDoSpecConstr,
907 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
909 -- Final clean-up simplification:
910 CoreDoSimplify (SimplPhase 0) [
911 MaxSimplifierIterations max_iter
914 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing }
918 -- -----------------------------------------------------------------------------
919 -- StgToDo: abstraction of stg-to-stg passes to run.
922 = StgDoMassageForProfiling -- should be (next to) last
923 -- There's also setStgVarInfo, but its absolute "lastness"
924 -- is so critical that it is hardwired in (no flag).
927 getStgToDo :: DynFlags -> [StgToDo]
929 | Just todo <- stgToDo dflags = todo -- set explicitly by user
932 stg_stats = dopt Opt_StgStats dflags
934 todo1 = if stg_stats then [D_stg_stats] else []
936 todo2 | WayProf `elem` wayNames dflags
937 = StgDoMassageForProfiling : todo1
941 -- -----------------------------------------------------------------------------
945 allFlags = map ('-':) $
946 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
947 map ("fno-"++) flags ++
951 where ok (PrefixPred _ _) = False
953 flags = map fst fFlags
956 dynamic_flags :: [(String, OptKind DynP)]
958 ( "n" , NoArg (setDynFlag Opt_DryRun) )
959 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
960 , ( "F" , NoArg (setDynFlag Opt_Pp))
961 , ( "#include" , HasArg (addCmdlineHCInclude) )
962 , ( "v" , OptIntSuffix setVerbosity )
964 ------- Specific phases --------------------------------------------
965 , ( "pgmL" , HasArg (upd . setPgmL) )
966 , ( "pgmP" , HasArg (upd . setPgmP) )
967 , ( "pgmF" , HasArg (upd . setPgmF) )
968 , ( "pgmc" , HasArg (upd . setPgmc) )
969 , ( "pgmm" , HasArg (upd . setPgmm) )
970 , ( "pgms" , HasArg (upd . setPgms) )
971 , ( "pgma" , HasArg (upd . setPgma) )
972 , ( "pgml" , HasArg (upd . setPgml) )
973 , ( "pgmdll" , HasArg (upd . setPgmdll) )
974 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
976 , ( "optL" , HasArg (upd . addOptL) )
977 , ( "optP" , HasArg (upd . addOptP) )
978 , ( "optF" , HasArg (upd . addOptF) )
979 , ( "optc" , HasArg (upd . addOptc) )
980 , ( "optm" , HasArg (upd . addOptm) )
981 , ( "opta" , HasArg (upd . addOpta) )
982 , ( "optl" , HasArg (upd . addOptl) )
983 , ( "optdep" , HasArg (upd . addOptdep) )
984 , ( "optwindres" , HasArg (upd . addOptwindres) )
986 , ( "split-objs" , NoArg (if can_split
987 then setDynFlag Opt_SplitObjs
990 -------- Linking ----------------------------------------------------
991 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
992 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
993 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
995 ------- Libraries ---------------------------------------------------
996 , ( "L" , Prefix addLibraryPath )
997 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
999 ------- Frameworks --------------------------------------------------
1000 -- -framework-path should really be -F ...
1001 , ( "framework-path" , HasArg addFrameworkPath )
1002 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1004 ------- Output Redirection ------------------------------------------
1005 , ( "odir" , HasArg (upd . setObjectDir))
1006 , ( "o" , SepArg (upd . setOutputFile . Just))
1007 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1008 , ( "osuf" , HasArg (upd . setObjectSuf))
1009 , ( "hcsuf" , HasArg (upd . setHcSuf))
1010 , ( "hisuf" , HasArg (upd . setHiSuf))
1011 , ( "hidir" , HasArg (upd . setHiDir))
1012 , ( "tmpdir" , HasArg (upd . setTmpDir))
1013 , ( "stubdir" , HasArg (upd . setStubDir))
1014 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1016 ------- Keeping temporary files -------------------------------------
1017 -- These can be singular (think ghc -c) or plural (think ghc --make)
1018 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1019 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1020 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1021 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1022 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1023 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1024 -- This only makes sense as plural
1025 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1027 ------- Miscellaneous ----------------------------------------------
1028 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1029 , ( "main-is" , SepArg setMainIs )
1030 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1031 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1032 , ( "hpcdir" , SepArg setOptHpcDir )
1034 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1035 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1036 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1038 ------- Packages ----------------------------------------------------
1039 , ( "package-conf" , HasArg extraPkgConf_ )
1040 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1041 , ( "package-name" , HasArg (upd . setPackageName) )
1042 , ( "package" , HasArg exposePackage )
1043 , ( "hide-package" , HasArg hidePackage )
1044 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1045 , ( "ignore-package" , HasArg ignorePackage )
1046 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1048 ------ HsCpp opts ---------------------------------------------------
1049 , ( "D", AnySuffix (upd . addOptP) )
1050 , ( "U", AnySuffix (upd . addOptP) )
1052 ------- Include/Import Paths ----------------------------------------
1053 , ( "I" , Prefix addIncludePath)
1054 , ( "i" , OptPrefix addImportPath )
1056 ------ Debugging ----------------------------------------------------
1057 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1059 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1060 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1061 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1062 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1063 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1064 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1065 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1066 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1067 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1068 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1069 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1070 , ( "ddump-asm-regalloc-stages",
1071 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1072 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1073 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1074 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1075 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1076 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1077 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1078 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1079 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1080 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1081 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1082 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1083 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1084 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1085 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1086 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1087 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1088 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1089 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1090 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1091 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1092 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1093 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1094 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1095 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1096 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1097 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1098 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1099 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1100 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1101 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1102 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1103 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1104 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1105 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1106 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1107 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1108 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1109 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1110 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1111 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1112 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1113 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1114 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1115 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1116 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1117 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1118 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1119 setVerbosity (Just 2)) )
1120 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1122 ------ Machine dependant (-m<blah>) stuff ---------------------------
1124 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1125 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1126 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1128 ------ Warning opts -------------------------------------------------
1129 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1130 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1131 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1132 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1133 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1134 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1136 ------ Optimisation flags ------------------------------------------
1137 , ( "O" , NoArg (upd (setOptLevel 1)))
1138 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1139 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1140 -- If the number is missing, use 1
1142 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1143 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1145 , ( "fspec-constr-threshold", IntSuffix (\n ->
1146 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1147 , ( "fno-spec-constr-threshold", NoArg (
1148 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1149 , ( "fliberate-case-threshold", IntSuffix (\n ->
1150 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1151 , ( "fno-liberate-case-threshold", NoArg (
1152 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1154 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1155 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1157 ------ Compiler flags -----------------------------------------------
1159 , ( "fasm", NoArg (setObjTarget HscAsm) )
1160 , ( "fvia-c", NoArg (setObjTarget HscC) )
1161 , ( "fvia-C", NoArg (setObjTarget HscC) )
1163 , ( "fno-code", NoArg (setTarget HscNothing))
1164 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1165 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1167 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1168 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1170 -- the rest of the -f* and -fno-* flags
1171 , ( "f", PrefixPred (isFlag fFlags)
1172 (\f -> setDynFlag (getFlag fFlags f)) )
1173 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1174 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1176 -- the -X* and -XNo* flags
1177 , ( "X", PrefixPred (isFlag xFlags)
1178 (\f -> setDynFlag (getFlag xFlags f)) )
1179 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1180 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1183 -- these -f<blah> flags can all be reversed with -fno-<blah>
1186 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1187 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1188 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1189 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1190 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1191 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1192 ( "warn-missing-fields", Opt_WarnMissingFields ),
1193 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1194 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1195 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1196 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1197 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1198 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1199 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1200 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1201 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1202 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1203 ( "warn-deprecations", Opt_WarnDeprecations ),
1204 ( "warn-orphans", Opt_WarnOrphans ),
1205 ( "warn-tabs", Opt_WarnTabs ),
1206 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1207 ( "strictness", Opt_Strictness ),
1208 ( "full-laziness", Opt_FullLaziness ),
1209 ( "liberate-case", Opt_LiberateCase ),
1210 ( "spec-constr", Opt_SpecConstr ),
1212 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1213 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1214 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1215 ( "ignore-asserts", Opt_IgnoreAsserts ),
1216 ( "do-eta-reduction", Opt_DoEtaReduction ),
1217 ( "case-merge", Opt_CaseMerge ),
1218 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1219 ( "dicts-cheap", Opt_DictsCheap ),
1220 ( "excess-precision", Opt_ExcessPrecision ),
1221 ( "asm-mangling", Opt_DoAsmMangling ),
1222 ( "print-bind-result", Opt_PrintBindResult ),
1223 ( "force-recomp", Opt_ForceRecomp ),
1224 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1225 ( "rewrite-rules", Opt_RewriteRules ),
1226 ( "break-on-exception", Opt_BreakOnException ),
1227 ( "break-on-error", Opt_BreakOnError ),
1228 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1229 ( "print-bind-contents", Opt_PrintBindContents ),
1230 ( "run-cps", Opt_RunCPSZ ),
1231 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1232 ( "vectorise", Opt_Vectorise ),
1233 ( "regs-graph", Opt_RegsGraph),
1234 ( "regs-iterative", Opt_RegsIterative),
1235 -- Deprecated in favour of -XTemplateHaskell:
1236 ( "th", Opt_TemplateHaskell ),
1237 -- Deprecated in favour of -XForeignFunctionInterface:
1238 ( "fi", Opt_ForeignFunctionInterface ),
1239 -- Deprecated in favour of -XForeignFunctionInterface:
1240 ( "ffi", Opt_ForeignFunctionInterface ),
1241 -- Deprecated in favour of -XArrows:
1242 ( "arrows", Opt_Arrows ),
1243 -- Deprecated in favour of -XGenerics:
1244 ( "generics", Opt_Generics ),
1245 -- Deprecated in favour of -XImplicitPrelude:
1246 ( "implicit-prelude", Opt_ImplicitPrelude ),
1247 -- Deprecated in favour of -XBangPatterns:
1248 ( "bang-patterns", Opt_BangPatterns ),
1249 -- Deprecated in favour of -XMonomorphismRestriction:
1250 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1251 -- Deprecated in favour of -XMonoPatBinds:
1252 ( "mono-pat-binds", Opt_MonoPatBinds ),
1253 -- Deprecated in favour of -XExtendedDefaultRules:
1254 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1255 -- Deprecated in favour of -XImplicitParams:
1256 ( "implicit-params", Opt_ImplicitParams ),
1257 -- Deprecated in favour of -XScopedTypeVariables:
1258 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1259 -- Deprecated in favour of -XPArr:
1260 ( "parr", Opt_PArr ),
1261 -- Deprecated in favour of -XOverlappingInstances:
1262 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1263 -- Deprecated in favour of -XUndecidableInstances:
1264 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1265 -- Deprecated in favour of -XIncoherentInstances:
1266 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1267 ( "gen-manifest", Opt_GenManifest ),
1268 ( "embed-manifest", Opt_EmbedManifest )
1271 supportedLanguages :: [String]
1272 supportedLanguages = map fst xFlags
1274 -- These -X<blah> flags can all be reversed with -XNo<blah>
1275 xFlags :: [(String, DynFlag)]
1278 ( "PatternGuards", Opt_PatternGuards ),
1279 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1280 ( "MagicHash", Opt_MagicHash ),
1281 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1282 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1283 ( "KindSignatures", Opt_KindSignatures ),
1284 ( "PatternSignatures", Opt_PatternSignatures ),
1285 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1286 ( "ParallelListComp", Opt_ParallelListComp ),
1287 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1288 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1289 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1290 ( "Rank2Types", Opt_Rank2Types ),
1291 ( "RankNTypes", Opt_RankNTypes ),
1292 ( "TypeOperators", Opt_TypeOperators ),
1293 ( "RecursiveDo", Opt_RecursiveDo ),
1294 ( "Arrows", Opt_Arrows ),
1295 ( "PArr", Opt_PArr ),
1296 ( "TemplateHaskell", Opt_TemplateHaskell ),
1297 ( "Generics", Opt_Generics ),
1299 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1300 ( "RecordWildCards", Opt_RecordWildCards ),
1301 ( "RecordPuns", Opt_RecordPuns ),
1302 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1303 ( "OverloadedStrings", Opt_OverloadedStrings ),
1304 ( "GADTs", Opt_GADTs ),
1305 ( "ViewPatterns", Opt_ViewPatterns),
1306 ( "TypeFamilies", Opt_TypeFamilies ),
1307 ( "BangPatterns", Opt_BangPatterns ),
1309 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1310 -- On by default (which is not strictly H98):
1311 ( "MonoPatBinds", Opt_MonoPatBinds ),
1312 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1313 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1314 ( "ImplicitParams", Opt_ImplicitParams ),
1315 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1316 ( "UnboxedTuples", Opt_UnboxedTuples ),
1317 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1318 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1319 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1320 ( "FlexibleContexts", Opt_FlexibleContexts ),
1321 ( "FlexibleInstances", Opt_FlexibleInstances ),
1322 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1323 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1324 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1325 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1326 ( "OverlappingInstances", Opt_OverlappingInstances ),
1327 ( "UndecidableInstances", Opt_UndecidableInstances ),
1328 ( "IncoherentInstances", Opt_IncoherentInstances )
1331 impliedFlags :: [(DynFlag, [DynFlag])]
1333 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1336 glasgowExtsFlags = [
1337 Opt_PrintExplicitForalls
1338 , Opt_ForeignFunctionInterface
1339 , Opt_UnliftedFFITypes
1341 , Opt_ImplicitParams
1342 , Opt_ScopedTypeVariables
1344 , Opt_TypeSynonymInstances
1345 , Opt_StandaloneDeriving
1346 , Opt_DeriveDataTypeable
1347 , Opt_FlexibleContexts
1348 , Opt_FlexibleInstances
1349 , Opt_ConstrainedClassMethods
1350 , Opt_MultiParamTypeClasses
1351 , Opt_FunctionalDependencies
1353 , Opt_PolymorphicComponents
1354 , Opt_ExistentialQuantification
1357 , Opt_LiberalTypeSynonyms
1361 , Opt_ParallelListComp
1362 , Opt_EmptyDataDecls
1363 , Opt_KindSignatures
1364 , Opt_PatternSignatures
1365 , Opt_GeneralizedNewtypeDeriving
1366 , Opt_TypeFamilies ]
1369 isFlag :: [(String,a)] -> String -> Bool
1370 isFlag flags f = any (\(ff,_) -> ff == f) flags
1372 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1373 isPrefFlag pref flags no_f
1374 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1378 getFlag :: [(String,a)] -> String -> a
1379 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1381 [] -> panic ("get_flag " ++ f)
1383 getPrefFlag :: String -> [(String,a)] -> String -> a
1384 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1385 -- We should only be passed flags which match the prefix
1387 -- -----------------------------------------------------------------------------
1388 -- Parsing the dynamic flags.
1390 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1391 parseDynamicFlags dflags args = do
1392 let ((leftover,errs),dflags')
1393 = runCmdLine (processArgs dynamic_flags args) dflags
1394 when (not (null errs)) $ do
1395 throwDyn (UsageError (unlines errs))
1396 return (dflags', leftover)
1399 type DynP = CmdLineP DynFlags
1401 upd :: (DynFlags -> DynFlags) -> DynP ()
1403 dfs <- getCmdLineState
1404 putCmdLineState $! (f dfs)
1406 --------------------------
1407 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1408 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1410 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1411 -- When you set f, set the ones it implies
1412 -- When you un-set f, however, we don't un-set the things it implies
1413 -- (except for -fno-glasgow-exts, which is treated specially)
1415 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1417 --------------------------
1418 setDumpFlag :: DynFlag -> OptKind DynP
1419 setDumpFlag dump_flag
1420 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1421 -- Whenver we -ddump, switch off the recompilation checker,
1422 -- else you don't see the dump!
1424 setVerbosity :: Maybe Int -> DynP ()
1425 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1427 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1429 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1432 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1434 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1436 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1439 | Nothing <- unpackPackageId pid
1440 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1442 = \s -> s{ thisPackage = pid }
1444 pid = stringToPackageId p
1446 -- If we're linking a binary, then only targets that produce object
1447 -- code are allowed (requests for other target types are ignored).
1448 setTarget l = upd set
1451 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1454 -- Changes the target only if we're compiling object code. This is
1455 -- used by -fasm and -fvia-C, which switch from one to the other, but
1456 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1457 -- can be safely used in an OPTIONS_GHC pragma.
1458 setObjTarget l = upd set
1461 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1464 setOptLevel :: Int -> DynFlags -> DynFlags
1465 setOptLevel n dflags
1466 | hscTarget dflags == HscInterpreted && n > 0
1468 -- not in IO any more, oh well:
1469 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1471 = updOptLevel n dflags
1474 setMainIs :: String -> DynP ()
1476 | not (null main_fn) && isLower (head main_fn)
1477 -- The arg looked like "Foo.Bar.baz"
1478 = upd $ \d -> d{ mainFunIs = Just main_fn,
1479 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1481 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1482 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1484 | otherwise -- The arg looked like "baz"
1485 = upd $ \d -> d{ mainFunIs = Just arg }
1487 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1489 -----------------------------------------------------------------------------
1490 -- Paths & Libraries
1492 -- -i on its own deletes the import paths
1493 addImportPath "" = upd (\s -> s{importPaths = []})
1494 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1498 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1501 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1503 addFrameworkPath p =
1504 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1506 split_marker = ':' -- not configurable (ToDo)
1508 splitPathList :: String -> [String]
1509 splitPathList s = filter notNull (splitUp s)
1510 -- empty paths are ignored: there might be a trailing
1511 -- ':' in the initial list, for example. Empty paths can
1512 -- cause confusion when they are translated into -I options
1513 -- for passing to gcc.
1515 #ifndef mingw32_TARGET_OS
1516 splitUp xs = split split_marker xs
1518 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1520 -- That is, if "foo:bar:baz" is used, this interpreted as
1521 -- consisting of three entries, 'foo', 'bar', 'baz'.
1522 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1523 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1525 -- Notice that no attempt is made to fully replace the 'standard'
1526 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1527 -- that this will cause too much breakage for users & ':' will
1528 -- work fine even with DOS paths, if you're not insisting on being silly.
1531 splitUp (x:':':div:xs) | div `elem` dir_markers
1532 = ((x:':':div:p): splitUp rs)
1534 (p,rs) = findNextPath xs
1535 -- we used to check for existence of the path here, but that
1536 -- required the IO monad to be threaded through the command-line
1537 -- parser which is quite inconvenient. The
1538 splitUp xs = cons p (splitUp rs)
1540 (p,rs) = findNextPath xs
1545 -- will be called either when we've consumed nought or the
1546 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1547 -- finding the next split marker.
1549 case break (`elem` split_markers) xs of
1550 (p, d:ds) -> (p, ds)
1553 split_markers :: [Char]
1554 split_markers = [':', ';']
1556 dir_markers :: [Char]
1557 dir_markers = ['/', '\\']
1560 -- -----------------------------------------------------------------------------
1561 -- tmpDir, where we store temporary files.
1563 setTmpDir :: FilePath -> DynFlags -> DynFlags
1564 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1566 #if !defined(mingw32_HOST_OS)
1567 canonicalise p = normalisePath p
1569 -- Canonicalisation of temp path under win32 is a bit more
1570 -- involved: (a) strip trailing slash,
1571 -- (b) normalise slashes
1572 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1574 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1576 -- if we're operating under cygwin, and TMP/TEMP is of
1577 -- the form "/cygdrive/drive/path", translate this to
1578 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1579 -- understand /cygdrive paths.)
1581 | "/cygdrive/" `isPrefixOf` path =
1582 case drop (length "/cygdrive/") path of
1583 drive:xs@('/':_) -> drive:':':xs
1587 -- strip the trailing backslash (awful, but we only do this once).
1588 removeTrailingSlash path =
1595 -----------------------------------------------------------------------------
1598 setOptHpcDir :: String -> DynP ()
1599 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1601 -----------------------------------------------------------------------------
1602 -- Via-C compilation stuff
1604 -- There are some options that we need to pass to gcc when compiling
1605 -- Haskell code via C, but are only supported by recent versions of
1606 -- gcc. The configure script decides which of these options we need,
1607 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1608 -- read before each via-C compilation. The advantage of having these
1609 -- in a separate file is that the file can be created at install-time
1610 -- depending on the available gcc version, and even re-generated later
1611 -- if gcc is upgraded.
1613 -- The options below are not dependent on the version of gcc, only the
1616 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1617 [String]) -- for registerised HC compilations
1618 machdepCCOpts dflags
1619 #if alpha_TARGET_ARCH
1621 #ifdef HAVE_THREADED_RTS_SUPPORT
1625 -- For now, to suppress the gcc warning "call-clobbered
1626 -- register used for global register variable", we simply
1627 -- disable all warnings altogether using the -w flag. Oh well.
1629 #elif hppa_TARGET_ARCH
1630 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1631 -- (very nice, but too bad the HP /usr/include files don't agree.)
1632 = ( ["-D_HPUX_SOURCE"], [] )
1634 #elif m68k_TARGET_ARCH
1635 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1636 -- popping of args to routines to be explicit; if we let things
1637 -- be deferred 'til after an STGJUMP, imminent death is certain!
1639 -- -fomit-frame-pointer : *don't*
1640 -- It's better to have a6 completely tied up being a frame pointer
1641 -- rather than let GCC pick random things to do with it.
1642 -- (If we want to steal a6, then we would try to do things
1643 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1644 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1646 #elif i386_TARGET_ARCH
1647 -- -fno-defer-pop : basically the same game as for m68k
1649 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1650 -- the fp (%ebp) for our register maps.
1651 = let n_regs = stolen_x86_regs dflags
1654 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1655 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1658 "-fomit-frame-pointer",
1659 -- we want -fno-builtin, because when gcc inlines
1660 -- built-in functions like memcpy() it tends to
1661 -- run out of registers, requiring -monly-n-regs
1663 "-DSTOLEN_X86_REGS="++show n_regs ]
1666 #elif ia64_TARGET_ARCH
1667 = ( [], ["-fomit-frame-pointer", "-G0"] )
1669 #elif x86_64_TARGET_ARCH
1670 = ( [], ["-fomit-frame-pointer",
1671 "-fno-asynchronous-unwind-tables",
1672 -- the unwind tables are unnecessary for HC code,
1673 -- and get in the way of -split-objs. Another option
1674 -- would be to throw them away in the mangler, but this
1677 -- calling builtins like strlen() using the FFI can
1678 -- cause gcc to run out of regs, so use the external
1682 #elif sparc_TARGET_ARCH
1684 -- For now, to suppress the gcc warning "call-clobbered
1685 -- register used for global register variable", we simply
1686 -- disable all warnings altogether using the -w flag. Oh well.
1688 #elif powerpc_apple_darwin_TARGET
1690 -- Disable Apple's precompiling preprocessor. It's a great thing
1691 -- for "normal" programs, but it doesn't support register variable
1693 = ( [], ["-no-cpp-precomp"] )
1698 picCCOpts :: DynFlags -> [String]
1700 #if darwin_TARGET_OS
1701 -- Apple prefers to do things the other way round.
1702 -- PIC is on by default.
1703 -- -mdynamic-no-pic:
1704 -- Turn off PIC code generation.
1706 -- Don't generate "common" symbols - these are unwanted
1707 -- in dynamic libraries.
1710 = ["-fno-common", "-D__PIC__"]
1712 = ["-mdynamic-no-pic"]
1713 #elif mingw32_TARGET_OS
1714 -- no -fPIC for Windows
1721 = ["-fPIC", "-D__PIC__"]
1726 -- -----------------------------------------------------------------------------
1730 can_split = cSplitObjs == "YES"
1732 -- -----------------------------------------------------------------------------
1735 compilerInfo :: [(String, String)]
1736 compilerInfo = [("Project name", cProjectName),
1737 ("Project version", cProjectVersion),
1738 ("Booter version", cBooterVersion),
1740 ("Interface file version", cHscIfaceFileVersion),
1741 ("Have interpreter", cGhcWithInterpreter),
1742 ("Object splitting", cSplitObjs),
1743 ("Have native code generator", cGhcWithNativeCodeGen),
1744 ("Support SMP", cGhcWithSMP),
1745 ("Unregisterised", cGhcUnregisterised),
1746 ("Tables next to code", cGhcEnableTablesNextToCode),
1747 ("Win32 DLLs", cEnableWin32DLLs),
1748 ("RTS ways", cGhcRTSWays),
1749 ("Leading underscore", cLeadingUnderscore)]