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_TransformListComp
229 | Opt_GeneralizedNewtypeDeriving
232 | Opt_LiberalTypeSynonyms
235 | Opt_ImpredicativeTypes
238 | Opt_PrintExplicitForalls
246 | Opt_IgnoreInterfacePragmas
247 | Opt_OmitInterfacePragmas
248 | Opt_DoLambdaEtaExpansion
252 | Opt_UnboxStrictFields
256 | Opt_RegsGraph -- do graph coloring register allocation
257 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
265 | Opt_ExcessPrecision
266 | Opt_ReadUserPackageConf
270 | Opt_HideAllPackages
271 | Opt_PrintBindResult
275 | Opt_BreakOnException
277 | Opt_PrintEvldWithShow
278 | Opt_PrintBindContents
282 | Opt_ConvertToZipCfgAndBack
293 data DynFlags = DynFlags {
296 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
297 stgToDo :: Maybe [StgToDo], -- similarly
298 hscTarget :: HscTarget,
299 hscOutName :: String, -- name of the output file
300 extCoreName :: String, -- name of the .core output file
301 verbosity :: Int, -- verbosity level
302 optLevel :: Int, -- optimisation level
303 simplPhases :: Int, -- number of simplifier phases
304 maxSimplIterations :: Int, -- max simplifier iterations
305 ruleCheck :: Maybe String,
307 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
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,
336 -- | This is set by DriverPipeline.runPipeline based on where
337 -- its output is going.
338 dumpPrefix :: Maybe FilePath,
340 -- | Override the dumpPrefix set by runPipeline.
341 -- Set by -ddump-file-prefix
342 dumpPrefixForce :: Maybe FilePath,
344 includePaths :: [String],
345 libraryPaths :: [String],
346 frameworkPaths :: [String], -- used on darwin only
347 cmdlineFrameworks :: [String], -- ditto
348 tmpDir :: String, -- no trailing '/'
350 ghcUsagePath :: FilePath, -- Filled in by SysTools
351 ghciUsagePath :: FilePath, -- ditto
353 hpcDir :: String, -- ^ path to store the .mix files
355 -- options for particular phases
364 opt_windres :: [String],
366 -- commands for particular phases
368 pgm_P :: (String,[Option]),
370 pgm_c :: (String,[Option]),
371 pgm_m :: (String,[Option]),
372 pgm_s :: (String,[Option]),
373 pgm_a :: (String,[Option]),
374 pgm_l :: (String,[Option]),
375 pgm_dll :: (String,[Option]),
377 pgm_sysman :: String,
378 pgm_windres :: String,
381 extraPkgConfs :: [FilePath],
382 topDir :: FilePath, -- filled in by SysTools
383 systemPackageConfig :: FilePath, -- ditto
384 -- The -package-conf flags given on the command line, in the order
387 packageFlags :: [PackageFlag],
388 -- The -package and -hide-package flags from the command-line
391 -- NB. do not modify this field, it is calculated by
392 -- Packages.initPackages and Packages.updatePackages.
393 pkgDatabase :: Maybe (UniqFM PackageConfig),
394 pkgState :: PackageState,
400 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
402 haddockOptions :: Maybe String
413 -- | will this target result in an object file on the disk?
414 isObjectTarget :: HscTarget -> Bool
415 isObjectTarget HscC = True
416 isObjectTarget HscAsm = True
417 isObjectTarget _ = False
419 -- | The 'GhcMode' tells us whether we're doing multi-module
420 -- compilation (controlled via the "GHC" API) or one-shot
421 -- (single-module) compilation. This makes a difference primarily to
422 -- the "Finder": in one-shot mode we look for interface files for
423 -- imported modules, but in multi-module mode we look for source files
424 -- in order to check whether they need to be recompiled.
426 = CompManager -- ^ --make, GHCi, etc.
427 | OneShot -- ^ ghc -c Foo.hs
428 | MkDepend -- ^ ghc -M, see Finder for why we need this
431 isOneShot :: GhcMode -> Bool
432 isOneShot OneShot = True
433 isOneShot _other = False
435 -- | What kind of linking to do.
436 data GhcLink -- What to do in the link step, if there is one
437 = NoLink -- Don't link at all
438 | LinkBinary -- Link object code into a binary
439 | LinkInMemory -- Use the in-memory dynamic linker
440 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
443 isNoLink :: GhcLink -> Bool
444 isNoLink NoLink = True
445 isNoLink other = False
448 = ExposePackage String
450 | IgnorePackage String
453 defaultHscTarget = defaultObjectTarget
455 -- | the 'HscTarget' value corresponding to the default way to create
456 -- object files on the current platform.
458 | cGhcWithNativeCodeGen == "YES" = HscAsm
461 initDynFlags dflags = do
462 -- someday these will be dynamic flags
463 ways <- readIORef v_Ways
464 build_tag <- readIORef v_Build_tag
465 rts_build_tag <- readIORef v_RTS_Build_tag
468 buildTag = build_tag,
469 rtsBuildTag = rts_build_tag
474 ghcMode = CompManager,
475 ghcLink = LinkBinary,
478 hscTarget = defaultHscTarget,
484 maxSimplIterations = 4,
486 specConstrThreshold = Just 200,
487 liberateCaseThreshold = Just 200,
489 cmdlineHcIncludes = [],
493 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
495 thisPackage = mainPackageId,
501 objectSuf = phaseInputExt StopLn,
502 hcSuf = phaseInputExt HCc,
505 outputFile = Nothing,
507 dumpPrefix = Nothing,
508 dumpPrefixForce = Nothing,
512 cmdlineFrameworks = [],
513 tmpDir = cDEFAULT_TMPDIR,
531 pkgDatabase = Nothing,
532 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
533 haddockOptions = Nothing,
535 Opt_ReadUserPackageConf,
537 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
538 -- behaviour the default, to see if anyone notices
542 Opt_MonomorphismRestriction,
548 Opt_PrintBindContents
550 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
551 -- The default -O0 options
554 log_action = \severity srcSpan style msg ->
556 SevInfo -> hPutStrLn stderr (show (msg style))
557 SevFatal -> hPutStrLn stderr (show (msg style))
558 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
564 0 | print errors & warnings only
565 1 | minimal verbosity: print "compiling M ... done." for each module.
566 2 | equivalent to -dshow-passes
567 3 | equivalent to existing "ghc -v"
568 4 | "ghc -v -ddump-most"
569 5 | "ghc -v -ddump-all"
572 dopt :: DynFlag -> DynFlags -> Bool
573 dopt f dflags = f `elem` (flags dflags)
575 dopt_set :: DynFlags -> DynFlag -> DynFlags
576 dopt_set dfs f = dfs{ flags = f : flags dfs }
578 dopt_unset :: DynFlags -> DynFlag -> DynFlags
579 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
581 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
582 getOpts dflags opts = reverse (opts dflags)
583 -- We add to the options from the front, so we need to reverse the list
585 getVerbFlag :: DynFlags -> String
587 | verbosity dflags >= 3 = "-v"
590 setObjectDir f d = d{ objectDir = Just f}
591 setHiDir f d = d{ hiDir = Just f}
592 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
593 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
594 -- #included from the .hc file when compiling with -fvia-C.
596 setObjectSuf f d = d{ objectSuf = f}
597 setHiSuf f d = d{ hiSuf = f}
598 setHcSuf f d = d{ hcSuf = f}
600 setOutputFile f d = d{ outputFile = f}
601 setOutputHi f d = d{ outputHi = f}
603 setDumpPrefixForce f d = d { dumpPrefixForce = f}
605 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
606 -- Config.hs should really use Option.
607 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
609 setPgmL f d = d{ pgm_L = f}
610 setPgmF f d = d{ pgm_F = f}
611 setPgmc f d = d{ pgm_c = (f,[])}
612 setPgmm f d = d{ pgm_m = (f,[])}
613 setPgms f d = d{ pgm_s = (f,[])}
614 setPgma f d = d{ pgm_a = (f,[])}
615 setPgml f d = d{ pgm_l = (f,[])}
616 setPgmdll f d = d{ pgm_dll = (f,[])}
617 setPgmwindres f d = d{ pgm_windres = f}
619 addOptL f d = d{ opt_L = f : opt_L d}
620 addOptP f d = d{ opt_P = f : opt_P d}
621 addOptF f d = d{ opt_F = f : opt_F d}
622 addOptc f d = d{ opt_c = f : opt_c d}
623 addOptm f d = d{ opt_m = f : opt_m d}
624 addOpta f d = d{ opt_a = f : opt_a d}
625 addOptl f d = d{ opt_l = f : opt_l d}
626 addOptdep f d = d{ opt_dep = f : opt_dep d}
627 addOptwindres f d = d{ opt_windres = f : opt_windres d}
629 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
631 addHaddockOpts f d = d{ haddockOptions = Just f}
633 -- -----------------------------------------------------------------------------
634 -- Command-line options
636 -- When invoking external tools as part of the compilation pipeline, we
637 -- pass these a sequence of options on the command-line. Rather than
638 -- just using a list of Strings, we use a type that allows us to distinguish
639 -- between filepaths and 'other stuff'. [The reason being, of course, that
640 -- this type gives us a handle on transforming filenames, and filenames only,
641 -- to whatever format they're expected to be on a particular platform.]
644 = FileOption -- an entry that _contains_ filename(s) / filepaths.
645 String -- a non-filepath prefix that shouldn't be
646 -- transformed (e.g., "/out=")
647 String -- the filepath/filename portion
650 -----------------------------------------------------------------------------
651 -- Setting the optimisation level
653 updOptLevel :: Int -> DynFlags -> DynFlags
654 -- Set dynflags appropriate to the optimisation level
656 = dfs2{ optLevel = final_n }
658 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
659 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
660 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
662 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
663 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
665 optLevelFlags :: [([Int], DynFlag)]
667 = [ ([0], Opt_IgnoreInterfacePragmas)
668 , ([0], Opt_OmitInterfacePragmas)
670 , ([1,2], Opt_IgnoreAsserts)
671 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
673 , ([1,2], Opt_DoEtaReduction)
674 , ([1,2], Opt_CaseMerge)
675 , ([1,2], Opt_Strictness)
677 , ([1,2], Opt_FullLaziness)
679 , ([2], Opt_LiberateCase)
680 , ([2], Opt_SpecConstr)
682 , ([0,1,2], Opt_DoLambdaEtaExpansion)
683 -- This one is important for a tiresome reason:
684 -- we want to make sure that the bindings for data
685 -- constructors are eta-expanded. This is probably
686 -- a good thing anyway, but it seems fragile.
689 -- -----------------------------------------------------------------------------
690 -- Standard sets of warning options
693 = [ Opt_WarnDeprecations,
694 Opt_WarnOverlappingPatterns,
695 Opt_WarnMissingFields,
696 Opt_WarnMissingMethods,
697 Opt_WarnDuplicateExports
701 = standardWarnings ++
702 [ Opt_WarnUnusedBinds,
703 Opt_WarnUnusedMatches,
704 Opt_WarnUnusedImports,
705 Opt_WarnIncompletePatterns,
711 [ Opt_WarnTypeDefaults,
712 Opt_WarnNameShadowing,
718 -- minuswRemovesOpts should be every warning option
721 [Opt_WarnImplicitPrelude,
722 Opt_WarnIncompletePatternsRecUpd,
723 Opt_WarnSimplePatterns,
724 Opt_WarnMonomorphism,
728 -- -----------------------------------------------------------------------------
729 -- CoreToDo: abstraction of core-to-core passes to run.
731 data CoreToDo -- These are diff core-to-core passes,
732 -- which may be invoked in any order,
733 -- as many times as you like.
735 = CoreDoSimplify -- The core-to-core simplifier.
738 -- Each run of the simplifier can take a different
739 -- set of simplifier-specific flags.
741 | CoreDoFloatOutwards FloatOutSwitches
746 | CoreDoWorkerWrapper
749 | CoreDoOldStrictness
752 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
753 -- matching this string
754 | CoreDoVectorisation
755 | CoreDoNothing -- Useful when building up
756 | CoreDoPasses [CoreToDo] -- lists of these things
758 data SimplifierMode -- See comments in SimplMonad
762 data SimplifierSwitch
763 = MaxSimplifierIterations Int
766 data FloatOutSwitches
767 = FloatOutSw Bool -- True <=> float lambdas to top level
768 Bool -- True <=> float constants to top level,
769 -- even if they do not escape a lambda
772 -- The core-to-core pass ordering is derived from the DynFlags:
773 runWhen :: Bool -> CoreToDo -> CoreToDo
774 runWhen True do_this = do_this
775 runWhen False do_this = CoreDoNothing
777 getCoreToDo :: DynFlags -> [CoreToDo]
779 | Just todo <- coreToDo dflags = todo -- set explicitly by user
780 | otherwise = core_todo
782 opt_level = optLevel dflags
783 phases = simplPhases dflags
784 max_iter = maxSimplIterations dflags
785 strictness = dopt Opt_Strictness dflags
786 full_laziness = dopt Opt_FullLaziness dflags
787 cse = dopt Opt_CSE dflags
788 spec_constr = dopt Opt_SpecConstr dflags
789 liberate_case = dopt Opt_LiberateCase dflags
790 rule_check = ruleCheck dflags
791 vectorisation = dopt Opt_Vectorise dflags
793 maybe_rule_check phase | Just s <- rule_check = CoreDoRuleCheck phase s
794 | otherwise = CoreDoNothing
796 simpl_phase phase iter = CoreDoPasses
797 [ CoreDoSimplify (SimplPhase phase) [
798 MaxSimplifierIterations iter
800 maybe_rule_check phase
803 -- By default, we have 2 phases before phase 0.
805 -- Want to run with inline phase 2 after the specialiser to give
806 -- maximum chance for fusion to work before we inline build/augment
807 -- in phase 1. This made a difference in 'ansi' where an
808 -- overloaded function wasn't inlined till too late.
810 -- Need phase 1 so that build/augment get
811 -- inlined. I found that spectral/hartel/genfft lost some useful
812 -- strictness in the function sumcode' if augment is not inlined
813 -- before strictness analysis runs
814 simpl_phases = CoreDoPasses [ simpl_phase phase max_iter
815 | phase <- [phases, phases-1 .. 1] ]
818 -- initial simplify: mk specialiser happy: minimum effort please
819 simpl_gently = CoreDoSimplify SimplGently [
821 -- Don't inline anything till full laziness has bitten
822 -- In particular, inlining wrappers inhibits floating
823 -- e.g. ...(case f x of ...)...
824 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
825 -- ==> ...(case x of I# x# -> case fw x# of ...)...
826 -- and now the redex (f x) isn't floatable any more
827 -- Similarly, don't apply any rules until after full
828 -- laziness. Notably, list fusion can prevent floating.
830 NoCaseOfCase, -- Don't do case-of-case transformations.
831 -- This makes full laziness work better
832 MaxSimplifierIterations max_iter
836 if opt_level == 0 then
837 [simpl_phase 0 max_iter]
838 else {- opt_level >= 1 -} [
840 -- initial simplify: mk specialiser happy: minimum effort please
843 -- We run vectorisation here for now, but we might also try to run
845 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently]),
847 -- Specialisation is best done before full laziness
848 -- so that overloaded functions have all their dictionary lambdas manifest
851 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
857 -- Phase 0: allow all Ids to be inlined now
858 -- This gets foldr inlined before strictness analysis
860 -- At least 3 iterations because otherwise we land up with
861 -- huge dead expressions because of an infelicity in the
863 -- let k = BIG in foldr k z xs
864 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
865 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
867 simpl_phase 0 (max max_iter 3),
870 #ifdef OLD_STRICTNESS
873 runWhen strictness (CoreDoPasses [
877 simpl_phase 0 max_iter
880 runWhen full_laziness
881 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
882 True)), -- Float constants
883 -- nofib/spectral/hartel/wang doubles in speed if you
884 -- do full laziness late in the day. It only happens
885 -- after fusion and other stuff, so the early pass doesn't
886 -- catch it. For the record, the redex is
887 -- f_el22 (f_el21 r_midblock)
891 -- We want CSE to follow the final full-laziness pass, because it may
892 -- succeed in commoning up things floated out by full laziness.
893 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
899 -- Case-liberation for -O2. This should be after
900 -- strictness analysis and the simplification which follows it.
901 runWhen liberate_case (CoreDoPasses [
903 simpl_phase 0 max_iter
904 ]), -- Run the simplifier after LiberateCase to vastly
905 -- reduce the possiblility of shadowing
906 -- Reason: see Note [Shadowing] in SpecConstr.lhs
908 runWhen spec_constr CoreDoSpecConstr,
912 -- Final clean-up simplification:
913 simpl_phase 0 max_iter
916 -- -----------------------------------------------------------------------------
917 -- StgToDo: abstraction of stg-to-stg passes to run.
920 = StgDoMassageForProfiling -- should be (next to) last
921 -- There's also setStgVarInfo, but its absolute "lastness"
922 -- is so critical that it is hardwired in (no flag).
925 getStgToDo :: DynFlags -> [StgToDo]
927 | Just todo <- stgToDo dflags = todo -- set explicitly by user
930 stg_stats = dopt Opt_StgStats dflags
932 todo1 = if stg_stats then [D_stg_stats] else []
934 todo2 | WayProf `elem` wayNames dflags
935 = StgDoMassageForProfiling : todo1
939 -- -----------------------------------------------------------------------------
943 allFlags = map ('-':) $
944 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
945 map ("fno-"++) flags ++
949 where ok (PrefixPred _ _) = False
951 flags = map fst fFlags
954 dynamic_flags :: [(String, OptKind DynP)]
956 ( "n" , NoArg (setDynFlag Opt_DryRun) )
957 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
958 , ( "F" , NoArg (setDynFlag Opt_Pp))
959 , ( "#include" , HasArg (addCmdlineHCInclude) )
960 , ( "v" , OptIntSuffix setVerbosity )
962 ------- Specific phases --------------------------------------------
963 , ( "pgmL" , HasArg (upd . setPgmL) )
964 , ( "pgmP" , HasArg (upd . setPgmP) )
965 , ( "pgmF" , HasArg (upd . setPgmF) )
966 , ( "pgmc" , HasArg (upd . setPgmc) )
967 , ( "pgmm" , HasArg (upd . setPgmm) )
968 , ( "pgms" , HasArg (upd . setPgms) )
969 , ( "pgma" , HasArg (upd . setPgma) )
970 , ( "pgml" , HasArg (upd . setPgml) )
971 , ( "pgmdll" , HasArg (upd . setPgmdll) )
972 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
974 , ( "optL" , HasArg (upd . addOptL) )
975 , ( "optP" , HasArg (upd . addOptP) )
976 , ( "optF" , HasArg (upd . addOptF) )
977 , ( "optc" , HasArg (upd . addOptc) )
978 , ( "optm" , HasArg (upd . addOptm) )
979 , ( "opta" , HasArg (upd . addOpta) )
980 , ( "optl" , HasArg (upd . addOptl) )
981 , ( "optdep" , HasArg (upd . addOptdep) )
982 , ( "optwindres" , HasArg (upd . addOptwindres) )
984 , ( "split-objs" , NoArg (if can_split
985 then setDynFlag Opt_SplitObjs
988 -------- Linking ----------------------------------------------------
989 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
990 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
991 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
993 ------- Libraries ---------------------------------------------------
994 , ( "L" , Prefix addLibraryPath )
995 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
997 ------- Frameworks --------------------------------------------------
998 -- -framework-path should really be -F ...
999 , ( "framework-path" , HasArg addFrameworkPath )
1000 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1002 ------- Output Redirection ------------------------------------------
1003 , ( "odir" , HasArg (upd . setObjectDir))
1004 , ( "o" , SepArg (upd . setOutputFile . Just))
1005 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1006 , ( "osuf" , HasArg (upd . setObjectSuf))
1007 , ( "hcsuf" , HasArg (upd . setHcSuf))
1008 , ( "hisuf" , HasArg (upd . setHiSuf))
1009 , ( "hidir" , HasArg (upd . setHiDir))
1010 , ( "tmpdir" , HasArg (upd . setTmpDir))
1011 , ( "stubdir" , HasArg (upd . setStubDir))
1012 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1014 ------- Keeping temporary files -------------------------------------
1015 -- These can be singular (think ghc -c) or plural (think ghc --make)
1016 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1017 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1018 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1019 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1020 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1021 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1022 -- This only makes sense as plural
1023 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1025 ------- Miscellaneous ----------------------------------------------
1026 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1027 , ( "main-is" , SepArg setMainIs )
1028 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1029 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1030 , ( "hpcdir" , SepArg setOptHpcDir )
1032 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1033 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1034 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1036 ------- Packages ----------------------------------------------------
1037 , ( "package-conf" , HasArg extraPkgConf_ )
1038 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1039 , ( "package-name" , HasArg (upd . setPackageName) )
1040 , ( "package" , HasArg exposePackage )
1041 , ( "hide-package" , HasArg hidePackage )
1042 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1043 , ( "ignore-package" , HasArg ignorePackage )
1044 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1046 ------ HsCpp opts ---------------------------------------------------
1047 , ( "D", AnySuffix (upd . addOptP) )
1048 , ( "U", AnySuffix (upd . addOptP) )
1050 ------- Include/Import Paths ----------------------------------------
1051 , ( "I" , Prefix addIncludePath)
1052 , ( "i" , OptPrefix addImportPath )
1054 ------ Debugging ----------------------------------------------------
1055 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1057 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1058 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1059 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1060 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1061 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1062 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1063 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1064 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1065 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1066 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1067 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1068 , ( "ddump-asm-regalloc-stages",
1069 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1070 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1071 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1072 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1073 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1074 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1075 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1076 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1077 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1078 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1079 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1080 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1081 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1082 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1083 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1084 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1085 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1086 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1087 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1088 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1089 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1090 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1091 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1092 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1093 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1094 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1095 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1096 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1097 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1098 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1099 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1100 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1101 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1102 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1103 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1104 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1105 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1106 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1107 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1108 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1109 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1110 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1111 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1112 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1113 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1114 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1115 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1116 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1117 setVerbosity (Just 2)) )
1118 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1120 ------ Machine dependant (-m<blah>) stuff ---------------------------
1122 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1123 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1124 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1126 ------ Warning opts -------------------------------------------------
1127 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1128 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1129 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1130 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1131 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1132 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1134 ------ Optimisation flags ------------------------------------------
1135 , ( "O" , NoArg (upd (setOptLevel 1)))
1136 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1137 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1138 -- If the number is missing, use 1
1140 , ( "fsimplifier-phases", IntSuffix (\n ->
1141 upd (\dfs -> dfs{ simplPhases = n })) )
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 ( "TransformListComp", Opt_TransformListComp ),
1288 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1289 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1290 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1291 ( "Rank2Types", Opt_Rank2Types ),
1292 ( "RankNTypes", Opt_RankNTypes ),
1293 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1294 ( "TypeOperators", Opt_TypeOperators ),
1295 ( "RecursiveDo", Opt_RecursiveDo ),
1296 ( "Arrows", Opt_Arrows ),
1297 ( "PArr", Opt_PArr ),
1298 ( "TemplateHaskell", Opt_TemplateHaskell ),
1299 ( "Generics", Opt_Generics ),
1301 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1302 ( "RecordWildCards", Opt_RecordWildCards ),
1303 ( "RecordPuns", Opt_RecordPuns ),
1304 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1305 ( "OverloadedStrings", Opt_OverloadedStrings ),
1306 ( "GADTs", Opt_GADTs ),
1307 ( "ViewPatterns", Opt_ViewPatterns),
1308 ( "TypeFamilies", Opt_TypeFamilies ),
1309 ( "BangPatterns", Opt_BangPatterns ),
1311 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1312 -- On by default (which is not strictly H98):
1313 ( "MonoPatBinds", Opt_MonoPatBinds ),
1314 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1315 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1316 ( "ImplicitParams", Opt_ImplicitParams ),
1317 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1318 ( "UnboxedTuples", Opt_UnboxedTuples ),
1319 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1320 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1321 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1322 ( "FlexibleContexts", Opt_FlexibleContexts ),
1323 ( "FlexibleInstances", Opt_FlexibleInstances ),
1324 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1325 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1326 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1327 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1328 ( "OverlappingInstances", Opt_OverlappingInstances ),
1329 ( "UndecidableInstances", Opt_UndecidableInstances ),
1330 ( "IncoherentInstances", Opt_IncoherentInstances )
1333 impliedFlags :: [(DynFlag, [DynFlag])]
1335 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1338 glasgowExtsFlags = [
1339 Opt_PrintExplicitForalls
1340 , Opt_ForeignFunctionInterface
1341 , Opt_UnliftedFFITypes
1343 , Opt_ImplicitParams
1344 , Opt_ScopedTypeVariables
1346 , Opt_TypeSynonymInstances
1347 , Opt_StandaloneDeriving
1348 , Opt_DeriveDataTypeable
1349 , Opt_FlexibleContexts
1350 , Opt_FlexibleInstances
1351 , Opt_ConstrainedClassMethods
1352 , Opt_MultiParamTypeClasses
1353 , Opt_FunctionalDependencies
1355 , Opt_PolymorphicComponents
1356 , Opt_ExistentialQuantification
1359 , Opt_LiberalTypeSynonyms
1361 , Opt_ImpredicativeTypes
1364 , Opt_ParallelListComp
1365 , Opt_EmptyDataDecls
1366 , Opt_KindSignatures
1367 , Opt_PatternSignatures
1368 , Opt_GeneralizedNewtypeDeriving
1369 , Opt_TypeFamilies ]
1372 isFlag :: [(String,a)] -> String -> Bool
1373 isFlag flags f = any (\(ff,_) -> ff == f) flags
1375 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1376 isPrefFlag pref flags no_f
1377 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1381 getFlag :: [(String,a)] -> String -> a
1382 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1384 [] -> panic ("get_flag " ++ f)
1386 getPrefFlag :: String -> [(String,a)] -> String -> a
1387 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1388 -- We should only be passed flags which match the prefix
1390 -- -----------------------------------------------------------------------------
1391 -- Parsing the dynamic flags.
1393 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1394 parseDynamicFlags dflags args = do
1395 let ((leftover,errs),dflags')
1396 = runCmdLine (processArgs dynamic_flags args) dflags
1397 when (not (null errs)) $ do
1398 throwDyn (UsageError (unlines errs))
1399 return (dflags', leftover)
1402 type DynP = CmdLineP DynFlags
1404 upd :: (DynFlags -> DynFlags) -> DynP ()
1406 dfs <- getCmdLineState
1407 putCmdLineState $! (f dfs)
1409 --------------------------
1410 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1411 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1413 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1414 -- When you set f, set the ones it implies
1415 -- When you un-set f, however, we don't un-set the things it implies
1416 -- (except for -fno-glasgow-exts, which is treated specially)
1418 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1420 --------------------------
1421 setDumpFlag :: DynFlag -> OptKind DynP
1422 setDumpFlag dump_flag
1423 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1424 -- Whenver we -ddump, switch off the recompilation checker,
1425 -- else you don't see the dump!
1427 setVerbosity :: Maybe Int -> DynP ()
1428 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1430 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1432 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1435 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1437 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1439 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1442 | Nothing <- unpackPackageId pid
1443 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1445 = \s -> s{ thisPackage = pid }
1447 pid = stringToPackageId p
1449 -- If we're linking a binary, then only targets that produce object
1450 -- code are allowed (requests for other target types are ignored).
1451 setTarget l = upd set
1454 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1457 -- Changes the target only if we're compiling object code. This is
1458 -- used by -fasm and -fvia-C, which switch from one to the other, but
1459 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1460 -- can be safely used in an OPTIONS_GHC pragma.
1461 setObjTarget l = upd set
1464 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1467 setOptLevel :: Int -> DynFlags -> DynFlags
1468 setOptLevel n dflags
1469 | hscTarget dflags == HscInterpreted && n > 0
1471 -- not in IO any more, oh well:
1472 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1474 = updOptLevel n dflags
1477 setMainIs :: String -> DynP ()
1479 | not (null main_fn) && isLower (head main_fn)
1480 -- The arg looked like "Foo.Bar.baz"
1481 = upd $ \d -> d{ mainFunIs = Just main_fn,
1482 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1484 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1485 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1487 | otherwise -- The arg looked like "baz"
1488 = upd $ \d -> d{ mainFunIs = Just arg }
1490 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1492 -----------------------------------------------------------------------------
1493 -- Paths & Libraries
1495 -- -i on its own deletes the import paths
1496 addImportPath "" = upd (\s -> s{importPaths = []})
1497 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1501 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1504 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1506 addFrameworkPath p =
1507 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1509 split_marker = ':' -- not configurable (ToDo)
1511 splitPathList :: String -> [String]
1512 splitPathList s = filter notNull (splitUp s)
1513 -- empty paths are ignored: there might be a trailing
1514 -- ':' in the initial list, for example. Empty paths can
1515 -- cause confusion when they are translated into -I options
1516 -- for passing to gcc.
1518 #ifndef mingw32_TARGET_OS
1519 splitUp xs = split split_marker xs
1521 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1523 -- That is, if "foo:bar:baz" is used, this interpreted as
1524 -- consisting of three entries, 'foo', 'bar', 'baz'.
1525 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1526 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1528 -- Notice that no attempt is made to fully replace the 'standard'
1529 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1530 -- that this will cause too much breakage for users & ':' will
1531 -- work fine even with DOS paths, if you're not insisting on being silly.
1534 splitUp (x:':':div:xs) | div `elem` dir_markers
1535 = ((x:':':div:p): splitUp rs)
1537 (p,rs) = findNextPath xs
1538 -- we used to check for existence of the path here, but that
1539 -- required the IO monad to be threaded through the command-line
1540 -- parser which is quite inconvenient. The
1541 splitUp xs = cons p (splitUp rs)
1543 (p,rs) = findNextPath xs
1548 -- will be called either when we've consumed nought or the
1549 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1550 -- finding the next split marker.
1552 case break (`elem` split_markers) xs of
1553 (p, d:ds) -> (p, ds)
1556 split_markers :: [Char]
1557 split_markers = [':', ';']
1559 dir_markers :: [Char]
1560 dir_markers = ['/', '\\']
1563 -- -----------------------------------------------------------------------------
1564 -- tmpDir, where we store temporary files.
1566 setTmpDir :: FilePath -> DynFlags -> DynFlags
1567 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1569 #if !defined(mingw32_HOST_OS)
1570 canonicalise p = normalisePath p
1572 -- Canonicalisation of temp path under win32 is a bit more
1573 -- involved: (a) strip trailing slash,
1574 -- (b) normalise slashes
1575 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1577 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1579 -- if we're operating under cygwin, and TMP/TEMP is of
1580 -- the form "/cygdrive/drive/path", translate this to
1581 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1582 -- understand /cygdrive paths.)
1584 | "/cygdrive/" `isPrefixOf` path =
1585 case drop (length "/cygdrive/") path of
1586 drive:xs@('/':_) -> drive:':':xs
1590 -- strip the trailing backslash (awful, but we only do this once).
1591 removeTrailingSlash path =
1598 -----------------------------------------------------------------------------
1601 setOptHpcDir :: String -> DynP ()
1602 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1604 -----------------------------------------------------------------------------
1605 -- Via-C compilation stuff
1607 -- There are some options that we need to pass to gcc when compiling
1608 -- Haskell code via C, but are only supported by recent versions of
1609 -- gcc. The configure script decides which of these options we need,
1610 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1611 -- read before each via-C compilation. The advantage of having these
1612 -- in a separate file is that the file can be created at install-time
1613 -- depending on the available gcc version, and even re-generated later
1614 -- if gcc is upgraded.
1616 -- The options below are not dependent on the version of gcc, only the
1619 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1620 [String]) -- for registerised HC compilations
1621 machdepCCOpts dflags
1622 #if alpha_TARGET_ARCH
1624 #ifdef HAVE_THREADED_RTS_SUPPORT
1628 -- For now, to suppress the gcc warning "call-clobbered
1629 -- register used for global register variable", we simply
1630 -- disable all warnings altogether using the -w flag. Oh well.
1632 #elif hppa_TARGET_ARCH
1633 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1634 -- (very nice, but too bad the HP /usr/include files don't agree.)
1635 = ( ["-D_HPUX_SOURCE"], [] )
1637 #elif m68k_TARGET_ARCH
1638 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1639 -- popping of args to routines to be explicit; if we let things
1640 -- be deferred 'til after an STGJUMP, imminent death is certain!
1642 -- -fomit-frame-pointer : *don't*
1643 -- It's better to have a6 completely tied up being a frame pointer
1644 -- rather than let GCC pick random things to do with it.
1645 -- (If we want to steal a6, then we would try to do things
1646 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1647 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1649 #elif i386_TARGET_ARCH
1650 -- -fno-defer-pop : basically the same game as for m68k
1652 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1653 -- the fp (%ebp) for our register maps.
1654 = let n_regs = stolen_x86_regs dflags
1657 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1658 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1661 "-fomit-frame-pointer",
1662 -- we want -fno-builtin, because when gcc inlines
1663 -- built-in functions like memcpy() it tends to
1664 -- run out of registers, requiring -monly-n-regs
1666 "-DSTOLEN_X86_REGS="++show n_regs ]
1669 #elif ia64_TARGET_ARCH
1670 = ( [], ["-fomit-frame-pointer", "-G0"] )
1672 #elif x86_64_TARGET_ARCH
1673 = ( [], ["-fomit-frame-pointer",
1674 "-fno-asynchronous-unwind-tables",
1675 -- the unwind tables are unnecessary for HC code,
1676 -- and get in the way of -split-objs. Another option
1677 -- would be to throw them away in the mangler, but this
1680 -- calling builtins like strlen() using the FFI can
1681 -- cause gcc to run out of regs, so use the external
1685 #elif sparc_TARGET_ARCH
1687 -- For now, to suppress the gcc warning "call-clobbered
1688 -- register used for global register variable", we simply
1689 -- disable all warnings altogether using the -w flag. Oh well.
1691 #elif powerpc_apple_darwin_TARGET
1693 -- Disable Apple's precompiling preprocessor. It's a great thing
1694 -- for "normal" programs, but it doesn't support register variable
1696 = ( [], ["-no-cpp-precomp"] )
1701 picCCOpts :: DynFlags -> [String]
1703 #if darwin_TARGET_OS
1704 -- Apple prefers to do things the other way round.
1705 -- PIC is on by default.
1706 -- -mdynamic-no-pic:
1707 -- Turn off PIC code generation.
1709 -- Don't generate "common" symbols - these are unwanted
1710 -- in dynamic libraries.
1713 = ["-fno-common", "-D__PIC__"]
1715 = ["-mdynamic-no-pic"]
1716 #elif mingw32_TARGET_OS
1717 -- no -fPIC for Windows
1724 = ["-fPIC", "-D__PIC__"]
1729 -- -----------------------------------------------------------------------------
1733 can_split = cSplitObjs == "YES"
1735 -- -----------------------------------------------------------------------------
1738 compilerInfo :: [(String, String)]
1739 compilerInfo = [("Project name", cProjectName),
1740 ("Project version", cProjectVersion),
1741 ("Booter version", cBooterVersion),
1743 ("Interface file version", cHscIfaceFileVersion),
1744 ("Have interpreter", cGhcWithInterpreter),
1745 ("Object splitting", cSplitObjs),
1746 ("Have native code generator", cGhcWithNativeCodeGen),
1747 ("Support SMP", cGhcWithSMP),
1748 ("Unregisterised", cGhcUnregisterised),
1749 ("Tables next to code", cGhcEnableTablesNextToCode),
1750 ("Win32 DLLs", cEnableWin32DLLs),
1751 ("RTS ways", cGhcRTSWays),
1752 ("Leading underscore", cLeadingUnderscore)]