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 maxSimplIterations :: Int, -- max simplifier iterations
304 ruleCheck :: Maybe String,
306 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
307 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
309 stolen_x86_regs :: Int,
310 cmdlineHcIncludes :: [String], -- -#includes
311 importPaths :: [FilePath],
313 mainFunIs :: Maybe String,
314 ctxtStkDepth :: Int, -- Typechecker context stack depth
316 thisPackage :: PackageId,
319 wayNames :: [WayName], -- way flags from the cmd line
320 buildTag :: String, -- the global "way" (eg. "p" for prof)
321 rtsBuildTag :: String, -- the RTS "way"
324 objectDir :: Maybe String,
325 hiDir :: Maybe String,
326 stubDir :: Maybe String,
332 outputFile :: Maybe String,
333 outputHi :: Maybe String,
335 -- | This is set by DriverPipeline.runPipeline based on where
336 -- its output is going.
337 dumpPrefix :: Maybe FilePath,
339 -- | Override the dumpPrefix set by runPipeline.
340 -- Set by -ddump-file-prefix
341 dumpPrefixForce :: Maybe FilePath,
343 includePaths :: [String],
344 libraryPaths :: [String],
345 frameworkPaths :: [String], -- used on darwin only
346 cmdlineFrameworks :: [String], -- ditto
347 tmpDir :: String, -- no trailing '/'
349 ghcUsagePath :: FilePath, -- Filled in by SysTools
350 ghciUsagePath :: FilePath, -- ditto
352 hpcDir :: String, -- ^ path to store the .mix files
354 -- options for particular phases
363 opt_windres :: [String],
365 -- commands for particular phases
367 pgm_P :: (String,[Option]),
369 pgm_c :: (String,[Option]),
370 pgm_m :: (String,[Option]),
371 pgm_s :: (String,[Option]),
372 pgm_a :: (String,[Option]),
373 pgm_l :: (String,[Option]),
374 pgm_dll :: (String,[Option]),
376 pgm_sysman :: String,
377 pgm_windres :: String,
380 extraPkgConfs :: [FilePath],
381 topDir :: FilePath, -- filled in by SysTools
382 systemPackageConfig :: FilePath, -- ditto
383 -- The -package-conf flags given on the command line, in the order
386 packageFlags :: [PackageFlag],
387 -- The -package and -hide-package flags from the command-line
390 -- NB. do not modify this field, it is calculated by
391 -- Packages.initPackages and Packages.updatePackages.
392 pkgDatabase :: Maybe (UniqFM PackageConfig),
393 pkgState :: PackageState,
399 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
401 haddockOptions :: Maybe String
412 -- | will this target result in an object file on the disk?
413 isObjectTarget :: HscTarget -> Bool
414 isObjectTarget HscC = True
415 isObjectTarget HscAsm = True
416 isObjectTarget _ = False
418 -- | The 'GhcMode' tells us whether we're doing multi-module
419 -- compilation (controlled via the "GHC" API) or one-shot
420 -- (single-module) compilation. This makes a difference primarily to
421 -- the "Finder": in one-shot mode we look for interface files for
422 -- imported modules, but in multi-module mode we look for source files
423 -- in order to check whether they need to be recompiled.
425 = CompManager -- ^ --make, GHCi, etc.
426 | OneShot -- ^ ghc -c Foo.hs
427 | MkDepend -- ^ ghc -M, see Finder for why we need this
430 isOneShot :: GhcMode -> Bool
431 isOneShot OneShot = True
432 isOneShot _other = False
434 -- | What kind of linking to do.
435 data GhcLink -- What to do in the link step, if there is one
436 = NoLink -- Don't link at all
437 | LinkBinary -- Link object code into a binary
438 | LinkInMemory -- Use the in-memory dynamic linker
439 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
442 isNoLink :: GhcLink -> Bool
443 isNoLink NoLink = True
444 isNoLink other = False
447 = ExposePackage String
449 | IgnorePackage String
452 defaultHscTarget = defaultObjectTarget
454 -- | the 'HscTarget' value corresponding to the default way to create
455 -- object files on the current platform.
457 | cGhcWithNativeCodeGen == "YES" = HscAsm
460 initDynFlags dflags = do
461 -- someday these will be dynamic flags
462 ways <- readIORef v_Ways
463 build_tag <- readIORef v_Build_tag
464 rts_build_tag <- readIORef v_RTS_Build_tag
467 buildTag = build_tag,
468 rtsBuildTag = rts_build_tag
473 ghcMode = CompManager,
474 ghcLink = LinkBinary,
477 hscTarget = defaultHscTarget,
482 maxSimplIterations = 4,
484 specConstrThreshold = Just 200,
485 liberateCaseThreshold = Just 200,
487 cmdlineHcIncludes = [],
491 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
493 thisPackage = mainPackageId,
499 objectSuf = phaseInputExt StopLn,
500 hcSuf = phaseInputExt HCc,
503 outputFile = Nothing,
505 dumpPrefix = Nothing,
506 dumpPrefixForce = Nothing,
510 cmdlineFrameworks = [],
511 tmpDir = cDEFAULT_TMPDIR,
529 pkgDatabase = Nothing,
530 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
531 haddockOptions = Nothing,
533 Opt_ReadUserPackageConf,
535 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
536 -- behaviour the default, to see if anyone notices
540 Opt_MonomorphismRestriction,
546 Opt_PrintBindContents
548 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
549 -- The default -O0 options
552 log_action = \severity srcSpan style msg ->
554 SevInfo -> hPutStrLn stderr (show (msg style))
555 SevFatal -> hPutStrLn stderr (show (msg style))
556 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
562 0 | print errors & warnings only
563 1 | minimal verbosity: print "compiling M ... done." for each module.
564 2 | equivalent to -dshow-passes
565 3 | equivalent to existing "ghc -v"
566 4 | "ghc -v -ddump-most"
567 5 | "ghc -v -ddump-all"
570 dopt :: DynFlag -> DynFlags -> Bool
571 dopt f dflags = f `elem` (flags dflags)
573 dopt_set :: DynFlags -> DynFlag -> DynFlags
574 dopt_set dfs f = dfs{ flags = f : flags dfs }
576 dopt_unset :: DynFlags -> DynFlag -> DynFlags
577 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
579 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
580 getOpts dflags opts = reverse (opts dflags)
581 -- We add to the options from the front, so we need to reverse the list
583 getVerbFlag :: DynFlags -> String
585 | verbosity dflags >= 3 = "-v"
588 setObjectDir f d = d{ objectDir = Just f}
589 setHiDir f d = d{ hiDir = Just f}
590 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
591 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
592 -- #included from the .hc file when compiling with -fvia-C.
594 setObjectSuf f d = d{ objectSuf = f}
595 setHiSuf f d = d{ hiSuf = f}
596 setHcSuf f d = d{ hcSuf = f}
598 setOutputFile f d = d{ outputFile = f}
599 setOutputHi f d = d{ outputHi = f}
601 setDumpPrefixForce f d = d { dumpPrefixForce = f}
603 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
604 -- Config.hs should really use Option.
605 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
607 setPgmL f d = d{ pgm_L = f}
608 setPgmF f d = d{ pgm_F = f}
609 setPgmc f d = d{ pgm_c = (f,[])}
610 setPgmm f d = d{ pgm_m = (f,[])}
611 setPgms f d = d{ pgm_s = (f,[])}
612 setPgma f d = d{ pgm_a = (f,[])}
613 setPgml f d = d{ pgm_l = (f,[])}
614 setPgmdll f d = d{ pgm_dll = (f,[])}
615 setPgmwindres f d = d{ pgm_windres = f}
617 addOptL f d = d{ opt_L = f : opt_L d}
618 addOptP f d = d{ opt_P = f : opt_P d}
619 addOptF f d = d{ opt_F = f : opt_F d}
620 addOptc f d = d{ opt_c = f : opt_c d}
621 addOptm f d = d{ opt_m = f : opt_m d}
622 addOpta f d = d{ opt_a = f : opt_a d}
623 addOptl f d = d{ opt_l = f : opt_l d}
624 addOptdep f d = d{ opt_dep = f : opt_dep d}
625 addOptwindres f d = d{ opt_windres = f : opt_windres d}
627 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
629 addHaddockOpts f d = d{ haddockOptions = Just f}
631 -- -----------------------------------------------------------------------------
632 -- Command-line options
634 -- When invoking external tools as part of the compilation pipeline, we
635 -- pass these a sequence of options on the command-line. Rather than
636 -- just using a list of Strings, we use a type that allows us to distinguish
637 -- between filepaths and 'other stuff'. [The reason being, of course, that
638 -- this type gives us a handle on transforming filenames, and filenames only,
639 -- to whatever format they're expected to be on a particular platform.]
642 = FileOption -- an entry that _contains_ filename(s) / filepaths.
643 String -- a non-filepath prefix that shouldn't be
644 -- transformed (e.g., "/out=")
645 String -- the filepath/filename portion
648 -----------------------------------------------------------------------------
649 -- Setting the optimisation level
651 updOptLevel :: Int -> DynFlags -> DynFlags
652 -- Set dynflags appropriate to the optimisation level
654 = dfs2{ optLevel = final_n }
656 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
657 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
658 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
660 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
661 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
663 optLevelFlags :: [([Int], DynFlag)]
665 = [ ([0], Opt_IgnoreInterfacePragmas)
666 , ([0], Opt_OmitInterfacePragmas)
668 , ([1,2], Opt_IgnoreAsserts)
669 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
671 , ([1,2], Opt_DoEtaReduction)
672 , ([1,2], Opt_CaseMerge)
673 , ([1,2], Opt_Strictness)
675 , ([1,2], Opt_FullLaziness)
677 , ([2], Opt_LiberateCase)
678 , ([2], Opt_SpecConstr)
680 , ([0,1,2], Opt_DoLambdaEtaExpansion)
681 -- This one is important for a tiresome reason:
682 -- we want to make sure that the bindings for data
683 -- constructors are eta-expanded. This is probably
684 -- a good thing anyway, but it seems fragile.
687 -- -----------------------------------------------------------------------------
688 -- Standard sets of warning options
691 = [ Opt_WarnDeprecations,
692 Opt_WarnOverlappingPatterns,
693 Opt_WarnMissingFields,
694 Opt_WarnMissingMethods,
695 Opt_WarnDuplicateExports
699 = standardWarnings ++
700 [ Opt_WarnUnusedBinds,
701 Opt_WarnUnusedMatches,
702 Opt_WarnUnusedImports,
703 Opt_WarnIncompletePatterns,
709 [ Opt_WarnTypeDefaults,
710 Opt_WarnNameShadowing,
716 -- minuswRemovesOpts should be every warning option
719 [Opt_WarnImplicitPrelude,
720 Opt_WarnIncompletePatternsRecUpd,
721 Opt_WarnSimplePatterns,
722 Opt_WarnMonomorphism,
726 -- -----------------------------------------------------------------------------
727 -- CoreToDo: abstraction of core-to-core passes to run.
729 data CoreToDo -- These are diff core-to-core passes,
730 -- which may be invoked in any order,
731 -- as many times as you like.
733 = CoreDoSimplify -- The core-to-core simplifier.
736 -- Each run of the simplifier can take a different
737 -- set of simplifier-specific flags.
739 | CoreDoFloatOutwards FloatOutSwitches
744 | CoreDoWorkerWrapper
747 | CoreDoOldStrictness
750 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
751 -- matching this string
752 | CoreDoVectorisation
753 | CoreDoNothing -- Useful when building up
754 | CoreDoPasses [CoreToDo] -- lists of these things
756 data SimplifierMode -- See comments in SimplMonad
760 data SimplifierSwitch
761 = MaxSimplifierIterations Int
764 data FloatOutSwitches
765 = FloatOutSw Bool -- True <=> float lambdas to top level
766 Bool -- True <=> float constants to top level,
767 -- even if they do not escape a lambda
770 -- The core-to-core pass ordering is derived from the DynFlags:
771 runWhen :: Bool -> CoreToDo -> CoreToDo
772 runWhen True do_this = do_this
773 runWhen False do_this = CoreDoNothing
775 getCoreToDo :: DynFlags -> [CoreToDo]
777 | Just todo <- coreToDo dflags = todo -- set explicitly by user
778 | otherwise = core_todo
780 opt_level = optLevel dflags
781 max_iter = maxSimplIterations dflags
782 strictness = dopt Opt_Strictness dflags
783 full_laziness = dopt Opt_FullLaziness dflags
784 cse = dopt Opt_CSE dflags
785 spec_constr = dopt Opt_SpecConstr dflags
786 liberate_case = dopt Opt_LiberateCase dflags
787 rule_check = ruleCheck dflags
788 vectorisation = dopt Opt_Vectorise dflags
790 maybe_rule_check phase | Just s <- rule_check = CoreDoRuleCheck phase s
791 | otherwise = CoreDoNothing
793 simpl_phase phase iter = CoreDoPasses
794 [ CoreDoSimplify (SimplPhase phase) [
795 MaxSimplifierIterations iter
797 maybe_rule_check phase
801 -- initial simplify: mk specialiser happy: minimum effort please
802 simpl_gently = CoreDoSimplify SimplGently [
804 -- Don't inline anything till full laziness has bitten
805 -- In particular, inlining wrappers inhibits floating
806 -- e.g. ...(case f x of ...)...
807 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
808 -- ==> ...(case x of I# x# -> case fw x# of ...)...
809 -- and now the redex (f x) isn't floatable any more
810 -- Similarly, don't apply any rules until after full
811 -- laziness. Notably, list fusion can prevent floating.
813 NoCaseOfCase, -- Don't do case-of-case transformations.
814 -- This makes full laziness work better
815 MaxSimplifierIterations max_iter
819 if opt_level == 0 then
820 [simpl_phase 0 max_iter]
821 else {- opt_level >= 1 -} [
823 -- initial simplify: mk specialiser happy: minimum effort please
826 -- We run vectorisation here for now, but we might also try to run
828 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently]),
830 -- Specialisation is best done before full laziness
831 -- so that overloaded functions have all their dictionary lambdas manifest
834 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
838 -- Want to run with inline phase 2 after the specialiser to give
839 -- maximum chance for fusion to work before we inline build/augment
840 -- in phase 1. This made a difference in 'ansi' where an
841 -- overloaded function wasn't inlined till too late.
842 simpl_phase 2 max_iter,
844 -- Need inline-phase2 here so that build/augment get
845 -- inlined. I found that spectral/hartel/genfft lost some useful
846 -- strictness in the function sumcode' if augment is not inlined
847 -- before strictness analysis runs
848 simpl_phase 1 max_iter,
850 -- Phase 0: allow all Ids to be inlined now
851 -- This gets foldr inlined before strictness analysis
853 -- At least 3 iterations because otherwise we land up with
854 -- huge dead expressions because of an infelicity in the
856 -- let k = BIG in foldr k z xs
857 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
858 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
860 simpl_phase 0 (max max_iter 3),
863 #ifdef OLD_STRICTNESS
866 runWhen strictness (CoreDoPasses [
870 simpl_phase 0 max_iter
873 runWhen full_laziness
874 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
875 True)), -- Float constants
876 -- nofib/spectral/hartel/wang doubles in speed if you
877 -- do full laziness late in the day. It only happens
878 -- after fusion and other stuff, so the early pass doesn't
879 -- catch it. For the record, the redex is
880 -- f_el22 (f_el21 r_midblock)
884 -- We want CSE to follow the final full-laziness pass, because it may
885 -- succeed in commoning up things floated out by full laziness.
886 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
892 -- Case-liberation for -O2. This should be after
893 -- strictness analysis and the simplification which follows it.
894 runWhen liberate_case (CoreDoPasses [
896 simpl_phase 0 max_iter
897 ]), -- Run the simplifier after LiberateCase to vastly
898 -- reduce the possiblility of shadowing
899 -- Reason: see Note [Shadowing] in SpecConstr.lhs
901 runWhen spec_constr CoreDoSpecConstr,
905 -- Final clean-up simplification:
906 simpl_phase 0 max_iter
909 -- -----------------------------------------------------------------------------
910 -- StgToDo: abstraction of stg-to-stg passes to run.
913 = StgDoMassageForProfiling -- should be (next to) last
914 -- There's also setStgVarInfo, but its absolute "lastness"
915 -- is so critical that it is hardwired in (no flag).
918 getStgToDo :: DynFlags -> [StgToDo]
920 | Just todo <- stgToDo dflags = todo -- set explicitly by user
923 stg_stats = dopt Opt_StgStats dflags
925 todo1 = if stg_stats then [D_stg_stats] else []
927 todo2 | WayProf `elem` wayNames dflags
928 = StgDoMassageForProfiling : todo1
932 -- -----------------------------------------------------------------------------
936 allFlags = map ('-':) $
937 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
938 map ("fno-"++) flags ++
942 where ok (PrefixPred _ _) = False
944 flags = map fst fFlags
947 dynamic_flags :: [(String, OptKind DynP)]
949 ( "n" , NoArg (setDynFlag Opt_DryRun) )
950 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
951 , ( "F" , NoArg (setDynFlag Opt_Pp))
952 , ( "#include" , HasArg (addCmdlineHCInclude) )
953 , ( "v" , OptIntSuffix setVerbosity )
955 ------- Specific phases --------------------------------------------
956 , ( "pgmL" , HasArg (upd . setPgmL) )
957 , ( "pgmP" , HasArg (upd . setPgmP) )
958 , ( "pgmF" , HasArg (upd . setPgmF) )
959 , ( "pgmc" , HasArg (upd . setPgmc) )
960 , ( "pgmm" , HasArg (upd . setPgmm) )
961 , ( "pgms" , HasArg (upd . setPgms) )
962 , ( "pgma" , HasArg (upd . setPgma) )
963 , ( "pgml" , HasArg (upd . setPgml) )
964 , ( "pgmdll" , HasArg (upd . setPgmdll) )
965 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
967 , ( "optL" , HasArg (upd . addOptL) )
968 , ( "optP" , HasArg (upd . addOptP) )
969 , ( "optF" , HasArg (upd . addOptF) )
970 , ( "optc" , HasArg (upd . addOptc) )
971 , ( "optm" , HasArg (upd . addOptm) )
972 , ( "opta" , HasArg (upd . addOpta) )
973 , ( "optl" , HasArg (upd . addOptl) )
974 , ( "optdep" , HasArg (upd . addOptdep) )
975 , ( "optwindres" , HasArg (upd . addOptwindres) )
977 , ( "split-objs" , NoArg (if can_split
978 then setDynFlag Opt_SplitObjs
981 -------- Linking ----------------------------------------------------
982 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
983 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
984 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
986 ------- Libraries ---------------------------------------------------
987 , ( "L" , Prefix addLibraryPath )
988 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
990 ------- Frameworks --------------------------------------------------
991 -- -framework-path should really be -F ...
992 , ( "framework-path" , HasArg addFrameworkPath )
993 , ( "framework" , HasArg (upd . addCmdlineFramework) )
995 ------- Output Redirection ------------------------------------------
996 , ( "odir" , HasArg (upd . setObjectDir))
997 , ( "o" , SepArg (upd . setOutputFile . Just))
998 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
999 , ( "osuf" , HasArg (upd . setObjectSuf))
1000 , ( "hcsuf" , HasArg (upd . setHcSuf))
1001 , ( "hisuf" , HasArg (upd . setHiSuf))
1002 , ( "hidir" , HasArg (upd . setHiDir))
1003 , ( "tmpdir" , HasArg (upd . setTmpDir))
1004 , ( "stubdir" , HasArg (upd . setStubDir))
1005 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1007 ------- Keeping temporary files -------------------------------------
1008 -- These can be singular (think ghc -c) or plural (think ghc --make)
1009 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1010 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1011 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1012 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1013 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1014 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1015 -- This only makes sense as plural
1016 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1018 ------- Miscellaneous ----------------------------------------------
1019 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1020 , ( "main-is" , SepArg setMainIs )
1021 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1022 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1023 , ( "hpcdir" , SepArg setOptHpcDir )
1025 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1026 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1027 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1029 ------- Packages ----------------------------------------------------
1030 , ( "package-conf" , HasArg extraPkgConf_ )
1031 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1032 , ( "package-name" , HasArg (upd . setPackageName) )
1033 , ( "package" , HasArg exposePackage )
1034 , ( "hide-package" , HasArg hidePackage )
1035 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1036 , ( "ignore-package" , HasArg ignorePackage )
1037 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1039 ------ HsCpp opts ---------------------------------------------------
1040 , ( "D", AnySuffix (upd . addOptP) )
1041 , ( "U", AnySuffix (upd . addOptP) )
1043 ------- Include/Import Paths ----------------------------------------
1044 , ( "I" , Prefix addIncludePath)
1045 , ( "i" , OptPrefix addImportPath )
1047 ------ Debugging ----------------------------------------------------
1048 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1050 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1051 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1052 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1053 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1054 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1055 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1056 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1057 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1058 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1059 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1060 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1061 , ( "ddump-asm-regalloc-stages",
1062 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1063 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1064 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1065 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1066 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1067 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1068 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1069 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1070 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1071 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1072 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1073 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1074 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1075 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1076 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1077 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1078 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1079 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1080 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1081 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1082 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1083 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1084 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1085 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1086 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1087 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1088 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1089 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1090 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1091 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1092 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1093 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1094 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1095 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1096 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1097 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1098 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1099 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1100 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1101 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1102 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1103 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1104 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1105 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1106 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1107 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1108 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1109 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1110 setVerbosity (Just 2)) )
1111 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1113 ------ Machine dependant (-m<blah>) stuff ---------------------------
1115 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1116 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1117 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1119 ------ Warning opts -------------------------------------------------
1120 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1121 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1122 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1123 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1124 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1125 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1127 ------ Optimisation flags ------------------------------------------
1128 , ( "O" , NoArg (upd (setOptLevel 1)))
1129 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1130 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1131 -- If the number is missing, use 1
1133 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1134 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1136 , ( "fspec-constr-threshold", IntSuffix (\n ->
1137 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1138 , ( "fno-spec-constr-threshold", NoArg (
1139 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1140 , ( "fliberate-case-threshold", IntSuffix (\n ->
1141 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1142 , ( "fno-liberate-case-threshold", NoArg (
1143 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1145 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1146 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1148 ------ Compiler flags -----------------------------------------------
1150 , ( "fasm", NoArg (setObjTarget HscAsm) )
1151 , ( "fvia-c", NoArg (setObjTarget HscC) )
1152 , ( "fvia-C", NoArg (setObjTarget HscC) )
1154 , ( "fno-code", NoArg (setTarget HscNothing))
1155 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1156 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1158 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1159 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1161 -- the rest of the -f* and -fno-* flags
1162 , ( "f", PrefixPred (isFlag fFlags)
1163 (\f -> setDynFlag (getFlag fFlags f)) )
1164 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1165 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1167 -- the -X* and -XNo* flags
1168 , ( "X", PrefixPred (isFlag xFlags)
1169 (\f -> setDynFlag (getFlag xFlags f)) )
1170 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1171 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1174 -- these -f<blah> flags can all be reversed with -fno-<blah>
1177 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1178 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1179 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1180 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1181 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1182 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1183 ( "warn-missing-fields", Opt_WarnMissingFields ),
1184 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1185 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1186 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1187 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1188 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1189 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1190 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1191 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1192 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1193 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1194 ( "warn-deprecations", Opt_WarnDeprecations ),
1195 ( "warn-orphans", Opt_WarnOrphans ),
1196 ( "warn-tabs", Opt_WarnTabs ),
1197 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1198 ( "strictness", Opt_Strictness ),
1199 ( "full-laziness", Opt_FullLaziness ),
1200 ( "liberate-case", Opt_LiberateCase ),
1201 ( "spec-constr", Opt_SpecConstr ),
1203 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1204 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1205 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1206 ( "ignore-asserts", Opt_IgnoreAsserts ),
1207 ( "do-eta-reduction", Opt_DoEtaReduction ),
1208 ( "case-merge", Opt_CaseMerge ),
1209 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1210 ( "dicts-cheap", Opt_DictsCheap ),
1211 ( "excess-precision", Opt_ExcessPrecision ),
1212 ( "asm-mangling", Opt_DoAsmMangling ),
1213 ( "print-bind-result", Opt_PrintBindResult ),
1214 ( "force-recomp", Opt_ForceRecomp ),
1215 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1216 ( "rewrite-rules", Opt_RewriteRules ),
1217 ( "break-on-exception", Opt_BreakOnException ),
1218 ( "break-on-error", Opt_BreakOnError ),
1219 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1220 ( "print-bind-contents", Opt_PrintBindContents ),
1221 ( "run-cps", Opt_RunCPSZ ),
1222 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1223 ( "vectorise", Opt_Vectorise ),
1224 ( "regs-graph", Opt_RegsGraph),
1225 ( "regs-iterative", Opt_RegsIterative),
1226 -- Deprecated in favour of -XTemplateHaskell:
1227 ( "th", Opt_TemplateHaskell ),
1228 -- Deprecated in favour of -XForeignFunctionInterface:
1229 ( "fi", Opt_ForeignFunctionInterface ),
1230 -- Deprecated in favour of -XForeignFunctionInterface:
1231 ( "ffi", Opt_ForeignFunctionInterface ),
1232 -- Deprecated in favour of -XArrows:
1233 ( "arrows", Opt_Arrows ),
1234 -- Deprecated in favour of -XGenerics:
1235 ( "generics", Opt_Generics ),
1236 -- Deprecated in favour of -XImplicitPrelude:
1237 ( "implicit-prelude", Opt_ImplicitPrelude ),
1238 -- Deprecated in favour of -XBangPatterns:
1239 ( "bang-patterns", Opt_BangPatterns ),
1240 -- Deprecated in favour of -XMonomorphismRestriction:
1241 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1242 -- Deprecated in favour of -XMonoPatBinds:
1243 ( "mono-pat-binds", Opt_MonoPatBinds ),
1244 -- Deprecated in favour of -XExtendedDefaultRules:
1245 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1246 -- Deprecated in favour of -XImplicitParams:
1247 ( "implicit-params", Opt_ImplicitParams ),
1248 -- Deprecated in favour of -XScopedTypeVariables:
1249 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1250 -- Deprecated in favour of -XPArr:
1251 ( "parr", Opt_PArr ),
1252 -- Deprecated in favour of -XOverlappingInstances:
1253 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1254 -- Deprecated in favour of -XUndecidableInstances:
1255 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1256 -- Deprecated in favour of -XIncoherentInstances:
1257 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1258 ( "gen-manifest", Opt_GenManifest ),
1259 ( "embed-manifest", Opt_EmbedManifest )
1262 supportedLanguages :: [String]
1263 supportedLanguages = map fst xFlags
1265 -- These -X<blah> flags can all be reversed with -XNo<blah>
1266 xFlags :: [(String, DynFlag)]
1269 ( "PatternGuards", Opt_PatternGuards ),
1270 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1271 ( "MagicHash", Opt_MagicHash ),
1272 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1273 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1274 ( "KindSignatures", Opt_KindSignatures ),
1275 ( "PatternSignatures", Opt_PatternSignatures ),
1276 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1277 ( "ParallelListComp", Opt_ParallelListComp ),
1278 ( "TransformListComp", Opt_TransformListComp ),
1279 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1280 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1281 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1282 ( "Rank2Types", Opt_Rank2Types ),
1283 ( "RankNTypes", Opt_RankNTypes ),
1284 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1285 ( "TypeOperators", Opt_TypeOperators ),
1286 ( "RecursiveDo", Opt_RecursiveDo ),
1287 ( "Arrows", Opt_Arrows ),
1288 ( "PArr", Opt_PArr ),
1289 ( "TemplateHaskell", Opt_TemplateHaskell ),
1290 ( "Generics", Opt_Generics ),
1292 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1293 ( "RecordWildCards", Opt_RecordWildCards ),
1294 ( "RecordPuns", Opt_RecordPuns ),
1295 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1296 ( "OverloadedStrings", Opt_OverloadedStrings ),
1297 ( "GADTs", Opt_GADTs ),
1298 ( "ViewPatterns", Opt_ViewPatterns),
1299 ( "TypeFamilies", Opt_TypeFamilies ),
1300 ( "BangPatterns", Opt_BangPatterns ),
1302 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1303 -- On by default (which is not strictly H98):
1304 ( "MonoPatBinds", Opt_MonoPatBinds ),
1305 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1306 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1307 ( "ImplicitParams", Opt_ImplicitParams ),
1308 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1309 ( "UnboxedTuples", Opt_UnboxedTuples ),
1310 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1311 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1312 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1313 ( "FlexibleContexts", Opt_FlexibleContexts ),
1314 ( "FlexibleInstances", Opt_FlexibleInstances ),
1315 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1316 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1317 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1318 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1319 ( "OverlappingInstances", Opt_OverlappingInstances ),
1320 ( "UndecidableInstances", Opt_UndecidableInstances ),
1321 ( "IncoherentInstances", Opt_IncoherentInstances )
1324 impliedFlags :: [(DynFlag, [DynFlag])]
1326 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1329 glasgowExtsFlags = [
1330 Opt_PrintExplicitForalls
1331 , Opt_ForeignFunctionInterface
1332 , Opt_UnliftedFFITypes
1334 , Opt_ImplicitParams
1335 , Opt_ScopedTypeVariables
1337 , Opt_TypeSynonymInstances
1338 , Opt_StandaloneDeriving
1339 , Opt_DeriveDataTypeable
1340 , Opt_FlexibleContexts
1341 , Opt_FlexibleInstances
1342 , Opt_ConstrainedClassMethods
1343 , Opt_MultiParamTypeClasses
1344 , Opt_FunctionalDependencies
1346 , Opt_PolymorphicComponents
1347 , Opt_ExistentialQuantification
1350 , Opt_LiberalTypeSynonyms
1352 , Opt_ImpredicativeTypes
1355 , Opt_ParallelListComp
1356 , Opt_EmptyDataDecls
1357 , Opt_KindSignatures
1358 , Opt_PatternSignatures
1359 , Opt_GeneralizedNewtypeDeriving
1360 , Opt_TypeFamilies ]
1363 isFlag :: [(String,a)] -> String -> Bool
1364 isFlag flags f = any (\(ff,_) -> ff == f) flags
1366 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1367 isPrefFlag pref flags no_f
1368 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1372 getFlag :: [(String,a)] -> String -> a
1373 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1375 [] -> panic ("get_flag " ++ f)
1377 getPrefFlag :: String -> [(String,a)] -> String -> a
1378 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1379 -- We should only be passed flags which match the prefix
1381 -- -----------------------------------------------------------------------------
1382 -- Parsing the dynamic flags.
1384 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1385 parseDynamicFlags dflags args = do
1386 let ((leftover,errs),dflags')
1387 = runCmdLine (processArgs dynamic_flags args) dflags
1388 when (not (null errs)) $ do
1389 throwDyn (UsageError (unlines errs))
1390 return (dflags', leftover)
1393 type DynP = CmdLineP DynFlags
1395 upd :: (DynFlags -> DynFlags) -> DynP ()
1397 dfs <- getCmdLineState
1398 putCmdLineState $! (f dfs)
1400 --------------------------
1401 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1402 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1404 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1405 -- When you set f, set the ones it implies
1406 -- When you un-set f, however, we don't un-set the things it implies
1407 -- (except for -fno-glasgow-exts, which is treated specially)
1409 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1411 --------------------------
1412 setDumpFlag :: DynFlag -> OptKind DynP
1413 setDumpFlag dump_flag
1414 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1415 -- Whenver we -ddump, switch off the recompilation checker,
1416 -- else you don't see the dump!
1418 setVerbosity :: Maybe Int -> DynP ()
1419 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1421 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1423 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1426 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1428 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1430 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1433 | Nothing <- unpackPackageId pid
1434 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1436 = \s -> s{ thisPackage = pid }
1438 pid = stringToPackageId p
1440 -- If we're linking a binary, then only targets that produce object
1441 -- code are allowed (requests for other target types are ignored).
1442 setTarget l = upd set
1445 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1448 -- Changes the target only if we're compiling object code. This is
1449 -- used by -fasm and -fvia-C, which switch from one to the other, but
1450 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1451 -- can be safely used in an OPTIONS_GHC pragma.
1452 setObjTarget l = upd set
1455 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1458 setOptLevel :: Int -> DynFlags -> DynFlags
1459 setOptLevel n dflags
1460 | hscTarget dflags == HscInterpreted && n > 0
1462 -- not in IO any more, oh well:
1463 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1465 = updOptLevel n dflags
1468 setMainIs :: String -> DynP ()
1470 | not (null main_fn) && isLower (head main_fn)
1471 -- The arg looked like "Foo.Bar.baz"
1472 = upd $ \d -> d{ mainFunIs = Just main_fn,
1473 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1475 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1476 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1478 | otherwise -- The arg looked like "baz"
1479 = upd $ \d -> d{ mainFunIs = Just arg }
1481 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1483 -----------------------------------------------------------------------------
1484 -- Paths & Libraries
1486 -- -i on its own deletes the import paths
1487 addImportPath "" = upd (\s -> s{importPaths = []})
1488 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1492 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1495 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1497 addFrameworkPath p =
1498 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1500 split_marker = ':' -- not configurable (ToDo)
1502 splitPathList :: String -> [String]
1503 splitPathList s = filter notNull (splitUp s)
1504 -- empty paths are ignored: there might be a trailing
1505 -- ':' in the initial list, for example. Empty paths can
1506 -- cause confusion when they are translated into -I options
1507 -- for passing to gcc.
1509 #ifndef mingw32_TARGET_OS
1510 splitUp xs = split split_marker xs
1512 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1514 -- That is, if "foo:bar:baz" is used, this interpreted as
1515 -- consisting of three entries, 'foo', 'bar', 'baz'.
1516 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1517 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1519 -- Notice that no attempt is made to fully replace the 'standard'
1520 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1521 -- that this will cause too much breakage for users & ':' will
1522 -- work fine even with DOS paths, if you're not insisting on being silly.
1525 splitUp (x:':':div:xs) | div `elem` dir_markers
1526 = ((x:':':div:p): splitUp rs)
1528 (p,rs) = findNextPath xs
1529 -- we used to check for existence of the path here, but that
1530 -- required the IO monad to be threaded through the command-line
1531 -- parser which is quite inconvenient. The
1532 splitUp xs = cons p (splitUp rs)
1534 (p,rs) = findNextPath xs
1539 -- will be called either when we've consumed nought or the
1540 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1541 -- finding the next split marker.
1543 case break (`elem` split_markers) xs of
1544 (p, d:ds) -> (p, ds)
1547 split_markers :: [Char]
1548 split_markers = [':', ';']
1550 dir_markers :: [Char]
1551 dir_markers = ['/', '\\']
1554 -- -----------------------------------------------------------------------------
1555 -- tmpDir, where we store temporary files.
1557 setTmpDir :: FilePath -> DynFlags -> DynFlags
1558 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1560 #if !defined(mingw32_HOST_OS)
1561 canonicalise p = normalisePath p
1563 -- Canonicalisation of temp path under win32 is a bit more
1564 -- involved: (a) strip trailing slash,
1565 -- (b) normalise slashes
1566 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1568 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1570 -- if we're operating under cygwin, and TMP/TEMP is of
1571 -- the form "/cygdrive/drive/path", translate this to
1572 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1573 -- understand /cygdrive paths.)
1575 | "/cygdrive/" `isPrefixOf` path =
1576 case drop (length "/cygdrive/") path of
1577 drive:xs@('/':_) -> drive:':':xs
1581 -- strip the trailing backslash (awful, but we only do this once).
1582 removeTrailingSlash path =
1589 -----------------------------------------------------------------------------
1592 setOptHpcDir :: String -> DynP ()
1593 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1595 -----------------------------------------------------------------------------
1596 -- Via-C compilation stuff
1598 -- There are some options that we need to pass to gcc when compiling
1599 -- Haskell code via C, but are only supported by recent versions of
1600 -- gcc. The configure script decides which of these options we need,
1601 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1602 -- read before each via-C compilation. The advantage of having these
1603 -- in a separate file is that the file can be created at install-time
1604 -- depending on the available gcc version, and even re-generated later
1605 -- if gcc is upgraded.
1607 -- The options below are not dependent on the version of gcc, only the
1610 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1611 [String]) -- for registerised HC compilations
1612 machdepCCOpts dflags
1613 #if alpha_TARGET_ARCH
1615 #ifdef HAVE_THREADED_RTS_SUPPORT
1619 -- For now, to suppress the gcc warning "call-clobbered
1620 -- register used for global register variable", we simply
1621 -- disable all warnings altogether using the -w flag. Oh well.
1623 #elif hppa_TARGET_ARCH
1624 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1625 -- (very nice, but too bad the HP /usr/include files don't agree.)
1626 = ( ["-D_HPUX_SOURCE"], [] )
1628 #elif m68k_TARGET_ARCH
1629 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1630 -- popping of args to routines to be explicit; if we let things
1631 -- be deferred 'til after an STGJUMP, imminent death is certain!
1633 -- -fomit-frame-pointer : *don't*
1634 -- It's better to have a6 completely tied up being a frame pointer
1635 -- rather than let GCC pick random things to do with it.
1636 -- (If we want to steal a6, then we would try to do things
1637 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1638 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1640 #elif i386_TARGET_ARCH
1641 -- -fno-defer-pop : basically the same game as for m68k
1643 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1644 -- the fp (%ebp) for our register maps.
1645 = let n_regs = stolen_x86_regs dflags
1648 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1649 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1652 "-fomit-frame-pointer",
1653 -- we want -fno-builtin, because when gcc inlines
1654 -- built-in functions like memcpy() it tends to
1655 -- run out of registers, requiring -monly-n-regs
1657 "-DSTOLEN_X86_REGS="++show n_regs ]
1660 #elif ia64_TARGET_ARCH
1661 = ( [], ["-fomit-frame-pointer", "-G0"] )
1663 #elif x86_64_TARGET_ARCH
1664 = ( [], ["-fomit-frame-pointer",
1665 "-fno-asynchronous-unwind-tables",
1666 -- the unwind tables are unnecessary for HC code,
1667 -- and get in the way of -split-objs. Another option
1668 -- would be to throw them away in the mangler, but this
1671 -- calling builtins like strlen() using the FFI can
1672 -- cause gcc to run out of regs, so use the external
1676 #elif sparc_TARGET_ARCH
1678 -- For now, to suppress the gcc warning "call-clobbered
1679 -- register used for global register variable", we simply
1680 -- disable all warnings altogether using the -w flag. Oh well.
1682 #elif powerpc_apple_darwin_TARGET
1684 -- Disable Apple's precompiling preprocessor. It's a great thing
1685 -- for "normal" programs, but it doesn't support register variable
1687 = ( [], ["-no-cpp-precomp"] )
1692 picCCOpts :: DynFlags -> [String]
1694 #if darwin_TARGET_OS
1695 -- Apple prefers to do things the other way round.
1696 -- PIC is on by default.
1697 -- -mdynamic-no-pic:
1698 -- Turn off PIC code generation.
1700 -- Don't generate "common" symbols - these are unwanted
1701 -- in dynamic libraries.
1704 = ["-fno-common", "-D__PIC__"]
1706 = ["-mdynamic-no-pic"]
1707 #elif mingw32_TARGET_OS
1708 -- no -fPIC for Windows
1715 = ["-fPIC", "-D__PIC__"]
1720 -- -----------------------------------------------------------------------------
1724 can_split = cSplitObjs == "YES"
1726 -- -----------------------------------------------------------------------------
1729 compilerInfo :: [(String, String)]
1730 compilerInfo = [("Project name", cProjectName),
1731 ("Project version", cProjectVersion),
1732 ("Booter version", cBooterVersion),
1734 ("Interface file version", cHscIfaceFileVersion),
1735 ("Have interpreter", cGhcWithInterpreter),
1736 ("Object splitting", cSplitObjs),
1737 ("Have native code generator", cGhcWithNativeCodeGen),
1738 ("Support SMP", cGhcWithSMP),
1739 ("Unregisterised", cGhcUnregisterised),
1740 ("Tables next to code", cGhcEnableTablesNextToCode),
1741 ("Win32 DLLs", cEnableWin32DLLs),
1742 ("RTS ways", cGhcRTSWays),
1743 ("Leading underscore", cLeadingUnderscore)]