2 {-# OPTIONS -fno-warn-missing-fields #-}
3 -----------------------------------------------------------------------------
7 -- Most flags are dynamic flags, which means they can change from
8 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
9 -- multi-session GHC each session can be using different dynamic
10 -- flags. Dynamic flags can also be set at the prompt in GHCi.
12 -- (c) The University of Glasgow 2005
14 -----------------------------------------------------------------------------
17 -- The above warning supression flag is a temporary kludge.
18 -- While working on this module you are encouraged to remove it and fix
19 -- any warnings in the module. See
20 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
33 -- Configuration of the core-to-core and stg-to-stg phases
37 SimplifierMode(..), FloatOutSwitches(..),
38 getCoreToDo, getStgToDo,
40 -- Manipulating DynFlags
41 defaultDynFlags, -- DynFlags
42 initDynFlags, -- DynFlags -> IO DynFlags
44 dopt, -- DynFlag -> DynFlags -> Bool
45 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
46 getOpts, -- (DynFlags -> [a]) -> IO [a]
57 machdepCCOpts, picCCOpts,
62 #include "HsVersions.h"
64 import Module ( Module, mkModuleName, mkModule, ModLocation )
66 import PrelNames ( mAIN )
67 #ifdef i386_TARGET_ARCH
68 import StaticFlags ( opt_Static )
70 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
72 import {-# SOURCE #-} Packages (PackageState)
73 import DriverPhases ( Phase(..), phaseInputExt )
76 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
77 import Panic ( panic, GhcException(..) )
78 import UniqFM ( UniqFM )
80 import Maybes ( orElse, fromJust )
81 import SrcLoc ( SrcSpan )
83 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
85 import Data.IORef ( readIORef )
86 import Control.Exception ( throwDyn )
87 import Control.Monad ( when )
88 #ifdef mingw32_TARGET_OS
89 import Data.List ( isPrefixOf )
94 import Data.Char ( isUpper )
95 import System.IO ( hPutStrLn, stderr )
97 -- -----------------------------------------------------------------------------
108 | Opt_D_dump_asm_native
109 | Opt_D_dump_asm_liveness
110 | Opt_D_dump_asm_coalesce
111 | Opt_D_dump_asm_regalloc
112 | Opt_D_dump_asm_regalloc_stages
113 | Opt_D_dump_asm_conflicts
114 | Opt_D_dump_asm_stats
120 | Opt_D_dump_inlinings
121 | Opt_D_dump_rule_firings
122 | Opt_D_dump_occur_anal
126 | Opt_D_dump_simpl_iterations
135 | Opt_D_dump_worker_wrapper
136 | Opt_D_dump_rn_trace
137 | Opt_D_dump_rn_stats
139 | Opt_D_dump_simpl_stats
140 | Opt_D_dump_tc_trace
141 | Opt_D_dump_if_trace
147 | Opt_D_verbose_core2core
148 | Opt_D_verbose_stg2stg
150 | Opt_D_dump_hi_diffs
151 | Opt_D_dump_minimal_imports
152 | Opt_D_dump_mod_cycles
153 | Opt_D_faststring_stats
154 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
159 | Opt_WarnIsError -- -Werror; makes warnings fatal
160 | Opt_WarnDuplicateExports
162 | Opt_WarnImplicitPrelude
163 | Opt_WarnIncompletePatterns
164 | Opt_WarnIncompletePatternsRecUpd
165 | Opt_WarnMissingFields
166 | Opt_WarnMissingMethods
167 | Opt_WarnMissingSigs
168 | Opt_WarnNameShadowing
169 | Opt_WarnOverlappingPatterns
170 | Opt_WarnSimplePatterns
171 | Opt_WarnTypeDefaults
172 | Opt_WarnMonomorphism
173 | Opt_WarnUnusedBinds
174 | Opt_WarnUnusedImports
175 | Opt_WarnUnusedMatches
176 | Opt_WarnDeprecations
177 | Opt_WarnDodgyImports
182 | Opt_OverlappingInstances
183 | Opt_UndecidableInstances
184 | Opt_IncoherentInstances
185 | Opt_MonomorphismRestriction
187 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
188 | Opt_ForeignFunctionInterface
189 | Opt_UnliftedFFITypes
190 | Opt_PArr -- Syntactic support for parallel arrays
191 | Opt_Arrows -- Arrow-notation syntax
192 | Opt_TemplateHaskell
195 | Opt_ImplicitPrelude
196 | Opt_ScopedTypeVariables
200 | Opt_OverloadedStrings
201 | Opt_DisambiguateRecordFields
202 | Opt_RecordWildCards
206 | Opt_StandaloneDeriving
207 | Opt_DeriveDataTypeable
208 | Opt_TypeSynonymInstances
209 | Opt_FlexibleContexts
210 | Opt_FlexibleInstances
211 | Opt_ConstrainedClassMethods
212 | Opt_MultiParamTypeClasses
213 | Opt_FunctionalDependencies
215 | Opt_PolymorphicComponents
216 | Opt_ExistentialQuantification
220 | Opt_PatternSignatures
221 | Opt_ParallelListComp
222 | Opt_GeneralizedNewtypeDeriving
225 | Opt_PartiallyAppliedClosedTypeSynonyms
230 | Opt_PrintExplicitForalls
238 | Opt_IgnoreInterfacePragmas
239 | Opt_OmitInterfacePragmas
240 | Opt_DoLambdaEtaExpansion
242 | Opt_IgnoreBreakpoints
245 | Opt_UnboxStrictFields
249 | Opt_RegsGraph -- do graph coloring register allocation
250 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
258 | Opt_ExcessPrecision
259 | Opt_ReadUserPackageConf
263 | Opt_HideAllPackages
264 | Opt_PrintBindResult
267 | Opt_BreakOnException
272 | Opt_ConvertToZipCfgAndBack
283 data DynFlags = DynFlags {
286 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
287 stgToDo :: Maybe [StgToDo], -- similarly
288 hscTarget :: HscTarget,
289 hscOutName :: String, -- name of the output file
290 extCoreName :: String, -- name of the .core output file
291 verbosity :: Int, -- verbosity level
292 optLevel :: Int, -- optimisation level
293 maxSimplIterations :: Int, -- max simplifier iterations
294 ruleCheck :: Maybe String,
296 specThreshold :: Int, -- Threshold for function specialisation
298 stolen_x86_regs :: Int,
299 cmdlineHcIncludes :: [String], -- -#includes
300 importPaths :: [FilePath],
302 mainFunIs :: Maybe String,
303 ctxtStkDepth :: Int, -- Typechecker context stack depth
305 thisPackage :: PackageId,
308 wayNames :: [WayName], -- way flags from the cmd line
309 buildTag :: String, -- the global "way" (eg. "p" for prof)
310 rtsBuildTag :: String, -- the RTS "way"
313 objectDir :: Maybe String,
314 hiDir :: Maybe String,
315 stubDir :: Maybe String,
321 outputFile :: Maybe String,
322 outputHi :: Maybe String,
324 -- | This is set by DriverPipeline.runPipeline based on where
325 -- its output is going.
326 dumpPrefix :: Maybe FilePath,
328 -- | Override the dumpPrefix set by runPipeline.
329 -- Set by -ddump-file-prefix
330 dumpPrefixForce :: Maybe FilePath,
332 includePaths :: [String],
333 libraryPaths :: [String],
334 frameworkPaths :: [String], -- used on darwin only
335 cmdlineFrameworks :: [String], -- ditto
336 tmpDir :: String, -- no trailing '/'
338 ghcUsagePath :: FilePath, -- Filled in by SysTools
339 ghciUsagePath :: FilePath, -- ditto
341 hpcDir :: String, -- ^ path to store the .mix files
343 -- options for particular phases
352 opt_windres :: [String],
354 -- commands for particular phases
356 pgm_P :: (String,[Option]),
358 pgm_c :: (String,[Option]),
359 pgm_m :: (String,[Option]),
360 pgm_s :: (String,[Option]),
361 pgm_a :: (String,[Option]),
362 pgm_l :: (String,[Option]),
363 pgm_dll :: (String,[Option]),
365 pgm_sysman :: String,
366 pgm_windres :: String,
369 extraPkgConfs :: [FilePath],
370 topDir :: FilePath, -- filled in by SysTools
371 systemPackageConfig :: FilePath, -- ditto
372 -- The -package-conf flags given on the command line, in the order
375 packageFlags :: [PackageFlag],
376 -- The -package and -hide-package flags from the command-line
379 -- NB. do not modify this field, it is calculated by
380 -- Packages.initPackages and Packages.updatePackages.
381 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
382 pkgState :: PackageState,
388 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
399 -- | will this target result in an object file on the disk?
400 isObjectTarget :: HscTarget -> Bool
401 isObjectTarget HscC = True
402 isObjectTarget HscAsm = True
403 isObjectTarget _ = False
405 -- | The 'GhcMode' tells us whether we're doing multi-module
406 -- compilation (controlled via the "GHC" API) or one-shot
407 -- (single-module) compilation. This makes a difference primarily to
408 -- the "Finder": in one-shot mode we look for interface files for
409 -- imported modules, but in multi-module mode we look for source files
410 -- in order to check whether they need to be recompiled.
412 = CompManager -- ^ --make, GHCi, etc.
413 | OneShot -- ^ ghc -c Foo.hs
414 | MkDepend -- ^ ghc -M, see Finder for why we need this
417 isOneShot :: GhcMode -> Bool
418 isOneShot OneShot = True
419 isOneShot _other = False
421 -- | What kind of linking to do.
422 data GhcLink -- What to do in the link step, if there is one
423 = NoLink -- Don't link at all
424 | LinkBinary -- Link object code into a binary
425 | LinkInMemory -- Use the in-memory dynamic linker
426 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
429 isNoLink :: GhcLink -> Bool
430 isNoLink NoLink = True
431 isNoLink other = False
434 = ExposePackage String
436 | IgnorePackage String
439 defaultHscTarget = defaultObjectTarget
441 -- | the 'HscTarget' value corresponding to the default way to create
442 -- object files on the current platform.
444 | cGhcWithNativeCodeGen == "YES" = HscAsm
447 initDynFlags dflags = do
448 -- someday these will be dynamic flags
449 ways <- readIORef v_Ways
450 build_tag <- readIORef v_Build_tag
451 rts_build_tag <- readIORef v_RTS_Build_tag
454 buildTag = build_tag,
455 rtsBuildTag = rts_build_tag
460 ghcMode = CompManager,
461 ghcLink = LinkBinary,
464 hscTarget = defaultHscTarget,
469 maxSimplIterations = 4,
473 cmdlineHcIncludes = [],
477 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
479 thisPackage = mainPackageId,
485 objectSuf = phaseInputExt StopLn,
486 hcSuf = phaseInputExt HCc,
489 outputFile = Nothing,
491 dumpPrefix = Nothing,
492 dumpPrefixForce = Nothing,
496 cmdlineFrameworks = [],
497 tmpDir = cDEFAULT_TMPDIR,
515 pkgDatabase = Nothing,
516 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
518 Opt_ReadUserPackageConf,
520 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
521 -- behaviour the default, to see if anyone notices
525 Opt_MonomorphismRestriction,
533 Opt_PrintBindResult ]
534 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
535 -- The default -O0 options
538 log_action = \severity srcSpan style msg ->
540 SevInfo -> hPutStrLn stderr (show (msg style))
541 SevFatal -> hPutStrLn stderr (show (msg style))
542 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
548 0 | print errors & warnings only
549 1 | minimal verbosity: print "compiling M ... done." for each module.
550 2 | equivalent to -dshow-passes
551 3 | equivalent to existing "ghc -v"
552 4 | "ghc -v -ddump-most"
553 5 | "ghc -v -ddump-all"
556 dopt :: DynFlag -> DynFlags -> Bool
557 dopt f dflags = f `elem` (flags dflags)
559 dopt_set :: DynFlags -> DynFlag -> DynFlags
560 dopt_set dfs f = dfs{ flags = f : flags dfs }
562 dopt_unset :: DynFlags -> DynFlag -> DynFlags
563 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
565 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
566 getOpts dflags opts = reverse (opts dflags)
567 -- We add to the options from the front, so we need to reverse the list
569 getVerbFlag :: DynFlags -> String
571 | verbosity dflags >= 3 = "-v"
574 setObjectDir f d = d{ objectDir = f}
575 setHiDir f d = d{ hiDir = f}
576 setStubDir f d = d{ stubDir = f}
578 setObjectSuf f d = d{ objectSuf = f}
579 setHiSuf f d = d{ hiSuf = f}
580 setHcSuf f d = d{ hcSuf = f}
582 setOutputFile f d = d{ outputFile = f}
583 setOutputHi f d = d{ outputHi = f}
585 setDumpPrefixForce f d = d { dumpPrefixForce = f}
587 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
588 -- Config.hs should really use Option.
589 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
591 setPgmL f d = d{ pgm_L = f}
592 setPgmF f d = d{ pgm_F = f}
593 setPgmc f d = d{ pgm_c = (f,[])}
594 setPgmm f d = d{ pgm_m = (f,[])}
595 setPgms f d = d{ pgm_s = (f,[])}
596 setPgma f d = d{ pgm_a = (f,[])}
597 setPgml f d = d{ pgm_l = (f,[])}
598 setPgmdll f d = d{ pgm_dll = (f,[])}
599 setPgmwindres f d = d{ pgm_windres = f}
601 addOptL f d = d{ opt_L = f : opt_L d}
602 addOptP f d = d{ opt_P = f : opt_P d}
603 addOptF f d = d{ opt_F = f : opt_F d}
604 addOptc f d = d{ opt_c = f : opt_c d}
605 addOptm f d = d{ opt_m = f : opt_m d}
606 addOpta f d = d{ opt_a = f : opt_a d}
607 addOptl f d = d{ opt_l = f : opt_l d}
608 addOptdep f d = d{ opt_dep = f : opt_dep d}
609 addOptwindres f d = d{ opt_windres = f : opt_windres d}
611 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
613 -- -----------------------------------------------------------------------------
614 -- Command-line options
616 -- When invoking external tools as part of the compilation pipeline, we
617 -- pass these a sequence of options on the command-line. Rather than
618 -- just using a list of Strings, we use a type that allows us to distinguish
619 -- between filepaths and 'other stuff'. [The reason being, of course, that
620 -- this type gives us a handle on transforming filenames, and filenames only,
621 -- to whatever format they're expected to be on a particular platform.]
624 = FileOption -- an entry that _contains_ filename(s) / filepaths.
625 String -- a non-filepath prefix that shouldn't be
626 -- transformed (e.g., "/out=")
627 String -- the filepath/filename portion
630 -----------------------------------------------------------------------------
631 -- Setting the optimisation level
633 updOptLevel :: Int -> DynFlags -> DynFlags
634 -- Set dynflags appropriate to the optimisation level
636 = dfs2{ optLevel = final_n }
638 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
639 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
640 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
642 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
643 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
645 optLevelFlags :: [([Int], DynFlag)]
647 = [ ([0], Opt_IgnoreInterfacePragmas)
648 , ([0], Opt_OmitInterfacePragmas)
650 , ([1,2], Opt_IgnoreAsserts)
651 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
653 , ([1,2], Opt_DoEtaReduction)
654 , ([1,2], Opt_CaseMerge)
655 , ([1,2], Opt_Strictness)
657 , ([1,2], Opt_FullLaziness)
659 , ([2], Opt_LiberateCase)
660 , ([2], Opt_SpecConstr)
662 , ([0,1,2], Opt_DoLambdaEtaExpansion)
663 -- This one is important for a tiresome reason:
664 -- we want to make sure that the bindings for data
665 -- constructors are eta-expanded. This is probably
666 -- a good thing anyway, but it seems fragile.
669 -- -----------------------------------------------------------------------------
670 -- Standard sets of warning options
673 = [ Opt_WarnDeprecations,
674 Opt_WarnOverlappingPatterns,
675 Opt_WarnMissingFields,
676 Opt_WarnMissingMethods,
677 Opt_WarnDuplicateExports
681 = standardWarnings ++
682 [ Opt_WarnUnusedBinds,
683 Opt_WarnUnusedMatches,
684 Opt_WarnUnusedImports,
685 Opt_WarnIncompletePatterns,
691 [ Opt_WarnTypeDefaults,
692 Opt_WarnNameShadowing,
698 -- minuswRemovesOpts should be every warning option
701 [Opt_WarnImplicitPrelude,
702 Opt_WarnIncompletePatternsRecUpd,
703 Opt_WarnSimplePatterns,
704 Opt_WarnMonomorphism,
708 -- -----------------------------------------------------------------------------
709 -- CoreToDo: abstraction of core-to-core passes to run.
711 data CoreToDo -- These are diff core-to-core passes,
712 -- which may be invoked in any order,
713 -- as many times as you like.
715 = CoreDoSimplify -- The core-to-core simplifier.
718 -- Each run of the simplifier can take a different
719 -- set of simplifier-specific flags.
721 | CoreDoFloatOutwards FloatOutSwitches
726 | CoreDoWorkerWrapper
729 | CoreDoOldStrictness
732 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
733 -- matching this string
734 | CoreDoVectorisation
735 | CoreDoNothing -- Useful when building up
736 | CoreDoPasses [CoreToDo] -- lists of these things
738 data SimplifierMode -- See comments in SimplMonad
742 data SimplifierSwitch
743 = MaxSimplifierIterations Int
746 data FloatOutSwitches
747 = FloatOutSw Bool -- True <=> float lambdas to top level
748 Bool -- True <=> float constants to top level,
749 -- even if they do not escape a lambda
752 -- The core-to-core pass ordering is derived from the DynFlags:
753 runWhen :: Bool -> CoreToDo -> CoreToDo
754 runWhen True do_this = do_this
755 runWhen False do_this = CoreDoNothing
757 getCoreToDo :: DynFlags -> [CoreToDo]
759 | Just todo <- coreToDo dflags = todo -- set explicitly by user
760 | otherwise = core_todo
762 opt_level = optLevel dflags
763 max_iter = maxSimplIterations dflags
764 strictness = dopt Opt_Strictness dflags
765 full_laziness = dopt Opt_FullLaziness dflags
766 cse = dopt Opt_CSE dflags
767 spec_constr = dopt Opt_SpecConstr dflags
768 liberate_case = dopt Opt_LiberateCase dflags
769 rule_check = ruleCheck dflags
770 vectorisation = dopt Opt_Vectorise dflags
773 if opt_level == 0 then
775 CoreDoSimplify (SimplPhase 0) [
776 MaxSimplifierIterations max_iter
779 else {- opt_level >= 1 -} [
781 -- initial simplify: mk specialiser happy: minimum effort please
782 CoreDoSimplify SimplGently [
784 -- Don't inline anything till full laziness has bitten
785 -- In particular, inlining wrappers inhibits floating
786 -- e.g. ...(case f x of ...)...
787 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
788 -- ==> ...(case x of I# x# -> case fw x# of ...)...
789 -- and now the redex (f x) isn't floatable any more
790 -- Similarly, don't apply any rules until after full
791 -- laziness. Notably, list fusion can prevent floating.
793 NoCaseOfCase, -- Don't do case-of-case transformations.
794 -- This makes full laziness work better
795 MaxSimplifierIterations max_iter
799 -- We run vectorisation here for now, but we might also try to run
801 runWhen vectorisation (CoreDoPasses [
803 CoreDoSimplify SimplGently
805 MaxSimplifierIterations max_iter]]),
807 -- Specialisation is best done before full laziness
808 -- so that overloaded functions have all their dictionary lambdas manifest
811 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
815 CoreDoSimplify (SimplPhase 2) [
816 -- Want to run with inline phase 2 after the specialiser to give
817 -- maximum chance for fusion to work before we inline build/augment
818 -- in phase 1. This made a difference in 'ansi' where an
819 -- overloaded function wasn't inlined till too late.
820 MaxSimplifierIterations max_iter
822 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
824 CoreDoSimplify (SimplPhase 1) [
825 -- Need inline-phase2 here so that build/augment get
826 -- inlined. I found that spectral/hartel/genfft lost some useful
827 -- strictness in the function sumcode' if augment is not inlined
828 -- before strictness analysis runs
829 MaxSimplifierIterations max_iter
831 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
833 CoreDoSimplify (SimplPhase 0) [
834 -- Phase 0: allow all Ids to be inlined now
835 -- This gets foldr inlined before strictness analysis
837 MaxSimplifierIterations 3
838 -- At least 3 iterations because otherwise we land up with
839 -- huge dead expressions because of an infelicity in the
841 -- let k = BIG in foldr k z xs
842 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
843 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
847 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
849 #ifdef OLD_STRICTNESS
852 runWhen strictness (CoreDoPasses [
856 CoreDoSimplify (SimplPhase 0) [
857 MaxSimplifierIterations max_iter
860 runWhen full_laziness
861 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
862 True)), -- Float constants
863 -- nofib/spectral/hartel/wang doubles in speed if you
864 -- do full laziness late in the day. It only happens
865 -- after fusion and other stuff, so the early pass doesn't
866 -- catch it. For the record, the redex is
867 -- f_el22 (f_el21 r_midblock)
871 -- We want CSE to follow the final full-laziness pass, because it may
872 -- succeed in commoning up things floated out by full laziness.
873 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
877 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
879 -- Case-liberation for -O2. This should be after
880 -- strictness analysis and the simplification which follows it.
881 runWhen liberate_case (CoreDoPasses [
883 CoreDoSimplify (SimplPhase 0) [
884 MaxSimplifierIterations max_iter
885 ] ]), -- Run the simplifier after LiberateCase to vastly
886 -- reduce the possiblility of shadowing
887 -- Reason: see Note [Shadowing] in SpecConstr.lhs
889 runWhen spec_constr CoreDoSpecConstr,
891 -- Final clean-up simplification:
892 CoreDoSimplify (SimplPhase 0) [
893 MaxSimplifierIterations max_iter
897 -- -----------------------------------------------------------------------------
898 -- StgToDo: abstraction of stg-to-stg passes to run.
901 = StgDoMassageForProfiling -- should be (next to) last
902 -- There's also setStgVarInfo, but its absolute "lastness"
903 -- is so critical that it is hardwired in (no flag).
906 getStgToDo :: DynFlags -> [StgToDo]
908 | Just todo <- stgToDo dflags = todo -- set explicitly by user
911 stg_stats = dopt Opt_StgStats dflags
913 todo1 = if stg_stats then [D_stg_stats] else []
915 todo2 | WayProf `elem` wayNames dflags
916 = StgDoMassageForProfiling : todo1
920 -- -----------------------------------------------------------------------------
924 allFlags = map ('-':) $
925 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
926 map ("fno-"++) flags ++
928 where ok (PrefixPred _ _) = False
930 flags = map fst fFlags
932 dynamic_flags :: [(String, OptKind DynP)]
934 ( "n" , NoArg (setDynFlag Opt_DryRun) )
935 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
936 , ( "F" , NoArg (setDynFlag Opt_Pp))
937 , ( "#include" , HasArg (addCmdlineHCInclude) )
938 , ( "v" , OptIntSuffix setVerbosity )
940 ------- Specific phases --------------------------------------------
941 , ( "pgmL" , HasArg (upd . setPgmL) )
942 , ( "pgmP" , HasArg (upd . setPgmP) )
943 , ( "pgmF" , HasArg (upd . setPgmF) )
944 , ( "pgmc" , HasArg (upd . setPgmc) )
945 , ( "pgmm" , HasArg (upd . setPgmm) )
946 , ( "pgms" , HasArg (upd . setPgms) )
947 , ( "pgma" , HasArg (upd . setPgma) )
948 , ( "pgml" , HasArg (upd . setPgml) )
949 , ( "pgmdll" , HasArg (upd . setPgmdll) )
950 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
952 , ( "optL" , HasArg (upd . addOptL) )
953 , ( "optP" , HasArg (upd . addOptP) )
954 , ( "optF" , HasArg (upd . addOptF) )
955 , ( "optc" , HasArg (upd . addOptc) )
956 , ( "optm" , HasArg (upd . addOptm) )
957 , ( "opta" , HasArg (upd . addOpta) )
958 , ( "optl" , HasArg (upd . addOptl) )
959 , ( "optdep" , HasArg (upd . addOptdep) )
960 , ( "optwindres" , HasArg (upd . addOptwindres) )
962 , ( "split-objs" , NoArg (if can_split
963 then setDynFlag Opt_SplitObjs
966 -------- Linking ----------------------------------------------------
967 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
968 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
969 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
971 ------- Libraries ---------------------------------------------------
972 , ( "L" , Prefix addLibraryPath )
973 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
975 ------- Frameworks --------------------------------------------------
976 -- -framework-path should really be -F ...
977 , ( "framework-path" , HasArg addFrameworkPath )
978 , ( "framework" , HasArg (upd . addCmdlineFramework) )
980 ------- Output Redirection ------------------------------------------
981 , ( "odir" , HasArg (upd . setObjectDir . Just))
982 , ( "o" , SepArg (upd . setOutputFile . Just))
983 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
984 , ( "osuf" , HasArg (upd . setObjectSuf))
985 , ( "hcsuf" , HasArg (upd . setHcSuf))
986 , ( "hisuf" , HasArg (upd . setHiSuf))
987 , ( "hidir" , HasArg (upd . setHiDir . Just))
988 , ( "tmpdir" , HasArg (upd . setTmpDir))
989 , ( "stubdir" , HasArg (upd . setStubDir . Just))
990 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
992 ------- Keeping temporary files -------------------------------------
993 -- These can be singular (think ghc -c) or plural (think ghc --make)
994 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
995 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
996 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
997 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
998 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
999 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1000 -- This only makes sense as plural
1001 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1003 ------- Miscellaneous ----------------------------------------------
1004 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1005 , ( "main-is" , SepArg setMainIs )
1006 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1007 , ( "hpcdir" , SepArg setOptHpcDir )
1009 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1010 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1011 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1013 ------- Packages ----------------------------------------------------
1014 , ( "package-conf" , HasArg extraPkgConf_ )
1015 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1016 , ( "package-name" , HasArg (upd . setPackageName) )
1017 , ( "package" , HasArg exposePackage )
1018 , ( "hide-package" , HasArg hidePackage )
1019 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1020 , ( "ignore-package" , HasArg ignorePackage )
1021 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1023 ------ HsCpp opts ---------------------------------------------------
1024 , ( "D", AnySuffix (upd . addOptP) )
1025 , ( "U", AnySuffix (upd . addOptP) )
1027 ------- Include/Import Paths ----------------------------------------
1028 , ( "I" , Prefix addIncludePath)
1029 , ( "i" , OptPrefix addImportPath )
1031 ------ Debugging ----------------------------------------------------
1032 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1034 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1035 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1036 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1037 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1038 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1039 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1040 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1041 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1042 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1043 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1044 , ( "ddump-asm-regalloc-stages",
1045 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1046 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1047 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1048 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1049 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1050 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1051 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1052 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1053 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1054 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1055 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1056 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1057 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1058 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1059 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1060 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1061 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1062 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1063 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1064 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1065 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1066 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1067 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1068 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1069 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1070 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1071 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1072 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1073 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1074 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1075 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1076 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1077 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1078 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1079 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1080 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1081 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1082 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1083 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1084 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1085 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1086 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1087 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1088 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1089 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1090 setVerbosity (Just 2)) )
1091 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1093 ------ Machine dependant (-m<blah>) stuff ---------------------------
1095 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1096 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1097 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1099 ------ Warning opts -------------------------------------------------
1100 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1101 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1102 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1103 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1104 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1105 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1107 ------ Optimisation flags ------------------------------------------
1108 , ( "O" , NoArg (upd (setOptLevel 1)))
1109 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1110 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1111 -- If the number is missing, use 1
1113 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1114 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1116 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1117 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1118 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1120 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1121 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1123 ------ Compiler flags -----------------------------------------------
1125 , ( "fasm", NoArg (setObjTarget HscAsm) )
1126 , ( "fvia-c", NoArg (setObjTarget HscC) )
1127 , ( "fvia-C", NoArg (setObjTarget HscC) )
1129 , ( "fno-code", NoArg (setTarget HscNothing))
1130 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1131 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1133 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1134 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1136 -- the rest of the -f* and -fno-* flags
1137 , ( "f", PrefixPred (isFlag fFlags)
1138 (\f -> setDynFlag (getFlag fFlags f)) )
1139 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1140 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1142 -- the -X* and -XNo* flags
1143 , ( "X", PrefixPred (isFlag xFlags)
1144 (\f -> setDynFlag (getFlag xFlags f)) )
1145 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1146 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1149 -- these -f<blah> flags can all be reversed with -fno-<blah>
1152 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1153 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1154 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1155 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1156 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1157 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1158 ( "warn-missing-fields", Opt_WarnMissingFields ),
1159 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1160 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1161 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1162 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1163 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1164 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1165 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1166 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1167 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1168 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1169 ( "warn-deprecations", Opt_WarnDeprecations ),
1170 ( "warn-orphans", Opt_WarnOrphans ),
1171 ( "warn-tabs", Opt_WarnTabs ),
1172 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1173 ( "strictness", Opt_Strictness ),
1174 ( "full-laziness", Opt_FullLaziness ),
1175 ( "liberate-case", Opt_LiberateCase ),
1176 ( "spec-constr", Opt_SpecConstr ),
1178 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1179 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1180 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1181 ( "ignore-asserts", Opt_IgnoreAsserts ),
1182 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1183 ( "do-eta-reduction", Opt_DoEtaReduction ),
1184 ( "case-merge", Opt_CaseMerge ),
1185 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1186 ( "dicts-cheap", Opt_DictsCheap ),
1187 ( "excess-precision", Opt_ExcessPrecision ),
1188 ( "asm-mangling", Opt_DoAsmMangling ),
1189 ( "print-bind-result", Opt_PrintBindResult ),
1190 ( "force-recomp", Opt_ForceRecomp ),
1191 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1192 ( "rewrite-rules", Opt_RewriteRules ),
1193 ( "break-on-exception", Opt_BreakOnException ),
1194 ( "break-on-error", Opt_BreakOnError ),
1195 ( "run-cps", Opt_RunCPSZ ),
1196 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1197 ( "vectorise", Opt_Vectorise ),
1198 ( "regs-graph", Opt_RegsGraph),
1199 ( "regs-iterative", Opt_RegsIterative),
1200 -- Deprecated in favour of -XTemplateHaskell:
1201 ( "th", Opt_TemplateHaskell ),
1202 -- Deprecated in favour of -XForeignFunctionInterface:
1203 ( "fi", Opt_ForeignFunctionInterface ),
1204 -- Deprecated in favour of -XForeignFunctionInterface:
1205 ( "ffi", Opt_ForeignFunctionInterface ),
1206 -- Deprecated in favour of -XArrows:
1207 ( "arrows", Opt_Arrows ),
1208 -- Deprecated in favour of -XGenerics:
1209 ( "generics", Opt_Generics ),
1210 -- Deprecated in favour of -XImplicitPrelude:
1211 ( "implicit-prelude", Opt_ImplicitPrelude ),
1212 -- Deprecated in favour of -XBangPatterns:
1213 ( "bang-patterns", Opt_BangPatterns ),
1214 -- Deprecated in favour of -XMonomorphismRestriction:
1215 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1216 -- Deprecated in favour of -XMonoPatBinds:
1217 ( "mono-pat-binds", Opt_MonoPatBinds ),
1218 -- Deprecated in favour of -XExtendedDefaultRules:
1219 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1220 -- Deprecated in favour of -XImplicitParams:
1221 ( "implicit-params", Opt_ImplicitParams ),
1222 -- Deprecated in favour of -XScopedTypeVariables:
1223 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1224 -- Deprecated in favour of -XPArr:
1225 ( "parr", Opt_PArr ),
1226 -- Deprecated in favour of -XOverlappingInstances:
1227 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1228 -- Deprecated in favour of -XUndecidableInstances:
1229 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1230 -- Deprecated in favour of -XIncoherentInstances:
1231 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1232 ( "gen-manifest", Opt_GenManifest ),
1233 ( "embed-manifest", Opt_EmbedManifest )
1236 supportedLanguages :: [String]
1237 supportedLanguages = map fst xFlags
1239 -- These -X<blah> flags can all be reversed with -XNo<blah>
1240 xFlags :: [(String, DynFlag)]
1243 ( "PatternGuards", Opt_PatternGuards ),
1244 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1245 ( "MagicHash", Opt_MagicHash ),
1246 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1247 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1248 ( "KindSignatures", Opt_KindSignatures ),
1249 ( "PatternSignatures", Opt_PatternSignatures ),
1250 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1251 ( "ParallelListComp", Opt_ParallelListComp ),
1252 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1253 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1254 ( "PartiallyAppliedClosedTypeSynonyms",
1255 Opt_PartiallyAppliedClosedTypeSynonyms ),
1256 ( "Rank2Types", Opt_Rank2Types ),
1257 ( "RankNTypes", Opt_RankNTypes ),
1258 ( "TypeOperators", Opt_TypeOperators ),
1259 ( "RecursiveDo", Opt_RecursiveDo ),
1260 ( "Arrows", Opt_Arrows ),
1261 ( "PArr", Opt_PArr ),
1262 ( "TemplateHaskell", Opt_TemplateHaskell ),
1263 ( "Generics", Opt_Generics ),
1265 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1266 ( "RecordWildCards", Opt_RecordWildCards ),
1267 ( "RecordPuns", Opt_RecordPuns ),
1268 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1269 ( "OverloadedStrings", Opt_OverloadedStrings ),
1270 ( "GADTs", Opt_GADTs ),
1271 ( "TypeFamilies", Opt_TypeFamilies ),
1272 ( "BangPatterns", Opt_BangPatterns ),
1274 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1275 -- On by default (which is not strictly H98):
1276 ( "MonoPatBinds", Opt_MonoPatBinds ),
1277 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1278 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1279 ( "ImplicitParams", Opt_ImplicitParams ),
1280 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1281 ( "UnboxedTuples", Opt_UnboxedTuples ),
1282 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1283 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1284 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1285 ( "FlexibleContexts", Opt_FlexibleContexts ),
1286 ( "FlexibleInstances", Opt_FlexibleInstances ),
1287 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1288 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1289 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1290 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1291 ( "OverlappingInstances", Opt_OverlappingInstances ),
1292 ( "UndecidableInstances", Opt_UndecidableInstances ),
1293 ( "IncoherentInstances", Opt_IncoherentInstances )
1296 impliedFlags :: [(DynFlag, [DynFlag])]
1298 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1301 glasgowExtsFlags = [
1302 Opt_PrintExplicitForalls
1303 , Opt_ForeignFunctionInterface
1304 , Opt_UnliftedFFITypes
1306 , Opt_ImplicitParams
1307 , Opt_ScopedTypeVariables
1309 , Opt_TypeSynonymInstances
1310 , Opt_StandaloneDeriving
1311 , Opt_DeriveDataTypeable
1312 , Opt_FlexibleContexts
1313 , Opt_FlexibleInstances
1314 , Opt_ConstrainedClassMethods
1315 , Opt_MultiParamTypeClasses
1316 , Opt_FunctionalDependencies
1318 , Opt_PolymorphicComponents
1319 , Opt_ExistentialQuantification
1322 , Opt_PartiallyAppliedClosedTypeSynonyms
1326 , Opt_ParallelListComp
1327 , Opt_EmptyDataDecls
1328 , Opt_KindSignatures
1329 , Opt_PatternSignatures
1330 , Opt_GeneralizedNewtypeDeriving
1331 , Opt_TypeFamilies ]
1334 isFlag :: [(String,a)] -> String -> Bool
1335 isFlag flags f = any (\(ff,_) -> ff == f) flags
1337 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1338 isPrefFlag pref flags no_f
1339 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1343 getFlag :: [(String,a)] -> String -> a
1344 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1346 [] -> panic ("get_flag " ++ f)
1348 getPrefFlag :: String -> [(String,a)] -> String -> a
1349 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1350 -- We should only be passed flags which match the prefix
1352 -- -----------------------------------------------------------------------------
1353 -- Parsing the dynamic flags.
1355 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1356 parseDynamicFlags dflags args = do
1357 let ((leftover,errs),dflags')
1358 = runCmdLine (processArgs dynamic_flags args) dflags
1359 when (not (null errs)) $ do
1360 throwDyn (UsageError (unlines errs))
1361 return (dflags', leftover)
1364 type DynP = CmdLineP DynFlags
1366 upd :: (DynFlags -> DynFlags) -> DynP ()
1368 dfs <- getCmdLineState
1369 putCmdLineState $! (f dfs)
1371 --------------------------
1372 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1373 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1375 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1376 -- When you set f, set the ones it implies
1377 -- When you un-set f, however, we don't un-set the things it implies
1378 -- (except for -fno-glasgow-exts, which is treated specially)
1380 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1382 --------------------------
1383 setDumpFlag :: DynFlag -> OptKind DynP
1384 setDumpFlag dump_flag
1385 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1386 -- Whenver we -ddump, switch off the recompilation checker,
1387 -- else you don't see the dump!
1389 setVerbosity :: Maybe Int -> DynP ()
1390 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1392 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1394 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1397 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1399 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1401 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1404 | Nothing <- unpackPackageId pid
1405 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1407 = \s -> s{ thisPackage = pid }
1409 pid = stringToPackageId p
1411 -- If we're linking a binary, then only targets that produce object
1412 -- code are allowed (requests for other target types are ignored).
1413 setTarget l = upd set
1416 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1419 -- Changes the target only if we're compiling object code. This is
1420 -- used by -fasm and -fvia-C, which switch from one to the other, but
1421 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1422 -- can be safely used in an OPTIONS_GHC pragma.
1423 setObjTarget l = upd set
1426 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1429 setOptLevel :: Int -> DynFlags -> DynFlags
1430 setOptLevel n dflags
1431 | hscTarget dflags == HscInterpreted && n > 0
1433 -- not in IO any more, oh well:
1434 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1436 = updOptLevel n dflags
1439 setMainIs :: String -> DynP ()
1441 | not (null main_fn) -- The arg looked like "Foo.baz"
1442 = upd $ \d -> d{ mainFunIs = Just main_fn,
1443 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1445 | isUpper (head main_mod) -- The arg looked like "Foo"
1446 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1448 | otherwise -- The arg looked like "baz"
1449 = upd $ \d -> d{ mainFunIs = Just main_mod }
1451 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1453 -----------------------------------------------------------------------------
1454 -- Paths & Libraries
1456 -- -i on its own deletes the import paths
1457 addImportPath "" = upd (\s -> s{importPaths = []})
1458 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1462 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1465 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1467 addFrameworkPath p =
1468 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1470 split_marker = ':' -- not configurable (ToDo)
1472 splitPathList :: String -> [String]
1473 splitPathList s = filter notNull (splitUp s)
1474 -- empty paths are ignored: there might be a trailing
1475 -- ':' in the initial list, for example. Empty paths can
1476 -- cause confusion when they are translated into -I options
1477 -- for passing to gcc.
1479 #ifndef mingw32_TARGET_OS
1480 splitUp xs = split split_marker xs
1482 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1484 -- That is, if "foo:bar:baz" is used, this interpreted as
1485 -- consisting of three entries, 'foo', 'bar', 'baz'.
1486 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1487 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1489 -- Notice that no attempt is made to fully replace the 'standard'
1490 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1491 -- that this will cause too much breakage for users & ':' will
1492 -- work fine even with DOS paths, if you're not insisting on being silly.
1495 splitUp (x:':':div:xs) | div `elem` dir_markers
1496 = ((x:':':div:p): splitUp rs)
1498 (p,rs) = findNextPath xs
1499 -- we used to check for existence of the path here, but that
1500 -- required the IO monad to be threaded through the command-line
1501 -- parser which is quite inconvenient. The
1502 splitUp xs = cons p (splitUp rs)
1504 (p,rs) = findNextPath xs
1509 -- will be called either when we've consumed nought or the
1510 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1511 -- finding the next split marker.
1513 case break (`elem` split_markers) xs of
1514 (p, d:ds) -> (p, ds)
1517 split_markers :: [Char]
1518 split_markers = [':', ';']
1520 dir_markers :: [Char]
1521 dir_markers = ['/', '\\']
1524 -- -----------------------------------------------------------------------------
1525 -- tmpDir, where we store temporary files.
1527 setTmpDir :: FilePath -> DynFlags -> DynFlags
1528 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1530 #if !defined(mingw32_HOST_OS)
1531 canonicalise p = normalisePath p
1533 -- Canonicalisation of temp path under win32 is a bit more
1534 -- involved: (a) strip trailing slash,
1535 -- (b) normalise slashes
1536 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1538 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1540 -- if we're operating under cygwin, and TMP/TEMP is of
1541 -- the form "/cygdrive/drive/path", translate this to
1542 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1543 -- understand /cygdrive paths.)
1545 | "/cygdrive/" `isPrefixOf` path =
1546 case drop (length "/cygdrive/") path of
1547 drive:xs@('/':_) -> drive:':':xs
1551 -- strip the trailing backslash (awful, but we only do this once).
1552 removeTrailingSlash path =
1559 -----------------------------------------------------------------------------
1562 setOptHpcDir :: String -> DynP ()
1563 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1565 -----------------------------------------------------------------------------
1566 -- Via-C compilation stuff
1568 -- There are some options that we need to pass to gcc when compiling
1569 -- Haskell code via C, but are only supported by recent versions of
1570 -- gcc. The configure script decides which of these options we need,
1571 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1572 -- read before each via-C compilation. The advantage of having these
1573 -- in a separate file is that the file can be created at install-time
1574 -- depending on the available gcc version, and even re-generated later
1575 -- if gcc is upgraded.
1577 -- The options below are not dependent on the version of gcc, only the
1580 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1581 [String]) -- for registerised HC compilations
1582 machdepCCOpts dflags
1583 #if alpha_TARGET_ARCH
1585 #ifdef HAVE_THREADED_RTS_SUPPORT
1589 -- For now, to suppress the gcc warning "call-clobbered
1590 -- register used for global register variable", we simply
1591 -- disable all warnings altogether using the -w flag. Oh well.
1593 #elif hppa_TARGET_ARCH
1594 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1595 -- (very nice, but too bad the HP /usr/include files don't agree.)
1596 = ( ["-D_HPUX_SOURCE"], [] )
1598 #elif m68k_TARGET_ARCH
1599 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1600 -- popping of args to routines to be explicit; if we let things
1601 -- be deferred 'til after an STGJUMP, imminent death is certain!
1603 -- -fomit-frame-pointer : *don't*
1604 -- It's better to have a6 completely tied up being a frame pointer
1605 -- rather than let GCC pick random things to do with it.
1606 -- (If we want to steal a6, then we would try to do things
1607 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1608 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1610 #elif i386_TARGET_ARCH
1611 -- -fno-defer-pop : basically the same game as for m68k
1613 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1614 -- the fp (%ebp) for our register maps.
1615 = let n_regs = stolen_x86_regs dflags
1618 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1619 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1622 "-fomit-frame-pointer",
1623 -- we want -fno-builtin, because when gcc inlines
1624 -- built-in functions like memcpy() it tends to
1625 -- run out of registers, requiring -monly-n-regs
1627 "-DSTOLEN_X86_REGS="++show n_regs ]
1630 #elif ia64_TARGET_ARCH
1631 = ( [], ["-fomit-frame-pointer", "-G0"] )
1633 #elif x86_64_TARGET_ARCH
1634 = ( [], ["-fomit-frame-pointer",
1635 "-fno-asynchronous-unwind-tables",
1636 -- the unwind tables are unnecessary for HC code,
1637 -- and get in the way of -split-objs. Another option
1638 -- would be to throw them away in the mangler, but this
1641 -- calling builtins like strlen() using the FFI can
1642 -- cause gcc to run out of regs, so use the external
1646 #elif sparc_TARGET_ARCH
1648 -- For now, to suppress the gcc warning "call-clobbered
1649 -- register used for global register variable", we simply
1650 -- disable all warnings altogether using the -w flag. Oh well.
1652 #elif powerpc_apple_darwin_TARGET
1654 -- Disable Apple's precompiling preprocessor. It's a great thing
1655 -- for "normal" programs, but it doesn't support register variable
1657 = ( [], ["-no-cpp-precomp"] )
1662 picCCOpts :: DynFlags -> [String]
1664 #if darwin_TARGET_OS
1665 -- Apple prefers to do things the other way round.
1666 -- PIC is on by default.
1667 -- -mdynamic-no-pic:
1668 -- Turn off PIC code generation.
1670 -- Don't generate "common" symbols - these are unwanted
1671 -- in dynamic libraries.
1674 = ["-fno-common", "-D__PIC__"]
1676 = ["-mdynamic-no-pic"]
1677 #elif mingw32_TARGET_OS
1678 -- no -fPIC for Windows
1685 = ["-fPIC", "-D__PIC__"]
1690 -- -----------------------------------------------------------------------------
1694 can_split = cSplitObjs == "YES"
1696 -- -----------------------------------------------------------------------------
1699 compilerInfo :: [(String, String)]
1700 compilerInfo = [("Project name", cProjectName),
1701 ("Project version", cProjectVersion),
1702 ("Booter version", cBooterVersion),
1704 ("Interface file version", cHscIfaceFileVersion),
1705 ("Have interpreter", cGhcWithInterpreter),
1706 ("Object splitting", cSplitObjs),
1707 ("Have native code generator", cGhcWithNativeCodeGen),
1708 ("Support SMP", cGhcWithSMP),
1709 ("Unregisterised", cGhcUnregisterised),
1710 ("Tables next to code", cGhcEnableTablesNextToCode),
1711 ("Win32 DLLs", cEnableWin32DLLs),
1712 ("RTS ways", cGhcRTSWays),
1713 ("Leading underscore", cLeadingUnderscore)]