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.FilePath
97 import System.IO ( hPutStrLn, stderr )
99 -- -----------------------------------------------------------------------------
107 | Opt_D_dump_cmmz_pretty
111 | Opt_D_dump_asm_native
112 | Opt_D_dump_asm_liveness
113 | Opt_D_dump_asm_coalesce
114 | Opt_D_dump_asm_regalloc
115 | Opt_D_dump_asm_regalloc_stages
116 | Opt_D_dump_asm_conflicts
117 | Opt_D_dump_asm_stats
123 | Opt_D_dump_inlinings
124 | Opt_D_dump_rule_firings
125 | Opt_D_dump_occur_anal
129 | Opt_D_dump_simpl_iterations
130 | Opt_D_dump_simpl_phases
139 | Opt_D_dump_worker_wrapper
140 | Opt_D_dump_rn_trace
141 | Opt_D_dump_rn_stats
143 | Opt_D_dump_simpl_stats
144 | Opt_D_dump_tc_trace
145 | Opt_D_dump_if_trace
151 | Opt_D_verbose_core2core
152 | Opt_D_verbose_stg2stg
154 | Opt_D_dump_hi_diffs
155 | Opt_D_dump_minimal_imports
156 | Opt_D_dump_mod_cycles
157 | Opt_D_dump_view_pattern_commoning
158 | Opt_D_faststring_stats
159 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
165 | Opt_WarnIsError -- -Werror; makes warnings fatal
166 | Opt_WarnDuplicateExports
168 | Opt_WarnImplicitPrelude
169 | Opt_WarnIncompletePatterns
170 | Opt_WarnIncompletePatternsRecUpd
171 | Opt_WarnMissingFields
172 | Opt_WarnMissingMethods
173 | Opt_WarnMissingSigs
174 | Opt_WarnNameShadowing
175 | Opt_WarnOverlappingPatterns
176 | Opt_WarnSimplePatterns
177 | Opt_WarnTypeDefaults
178 | Opt_WarnMonomorphism
179 | Opt_WarnUnusedBinds
180 | Opt_WarnUnusedImports
181 | Opt_WarnUnusedMatches
182 | Opt_WarnDeprecations
183 | Opt_WarnDodgyImports
188 | Opt_OverlappingInstances
189 | Opt_UndecidableInstances
190 | Opt_IncoherentInstances
191 | Opt_MonomorphismRestriction
193 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
194 | Opt_ForeignFunctionInterface
195 | Opt_UnliftedFFITypes
196 | Opt_PArr -- Syntactic support for parallel arrays
197 | Opt_Arrows -- Arrow-notation syntax
198 | Opt_TemplateHaskell
201 | Opt_ImplicitPrelude
202 | Opt_ScopedTypeVariables
206 | Opt_OverloadedStrings
207 | Opt_DisambiguateRecordFields
208 | Opt_RecordWildCards
213 | Opt_StandaloneDeriving
214 | Opt_DeriveDataTypeable
215 | Opt_TypeSynonymInstances
216 | Opt_FlexibleContexts
217 | Opt_FlexibleInstances
218 | Opt_ConstrainedClassMethods
219 | Opt_MultiParamTypeClasses
220 | Opt_FunctionalDependencies
222 | Opt_PolymorphicComponents
223 | Opt_ExistentialQuantification
227 | Opt_PatternSignatures
228 | Opt_ParallelListComp
229 | Opt_TransformListComp
230 | Opt_GeneralizedNewtypeDeriving
233 | Opt_LiberalTypeSynonyms
236 | Opt_ImpredicativeTypes
239 | Opt_PrintExplicitForalls
247 | Opt_IgnoreInterfacePragmas
248 | Opt_OmitInterfacePragmas
249 | Opt_DoLambdaEtaExpansion
253 | Opt_UnboxStrictFields
257 | Opt_RegsGraph -- do graph coloring register allocation
258 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
266 | Opt_ExcessPrecision
267 | Opt_ReadUserPackageConf
271 | Opt_HideAllPackages
272 | Opt_PrintBindResult
276 | Opt_BreakOnException
278 | Opt_PrintEvldWithShow
279 | Opt_PrintBindContents
283 | Opt_ConvertToZipCfgAndBack
294 data DynFlags = DynFlags {
297 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
298 stgToDo :: Maybe [StgToDo], -- similarly
299 hscTarget :: HscTarget,
300 hscOutName :: String, -- name of the output file
301 extCoreName :: String, -- name of the .core output file
302 verbosity :: Int, -- verbosity level
303 optLevel :: Int, -- optimisation level
304 simplPhases :: Int, -- number of simplifier phases
305 maxSimplIterations :: Int, -- max simplifier iterations
306 ruleCheck :: Maybe String,
308 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
309 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
311 stolen_x86_regs :: Int,
312 cmdlineHcIncludes :: [String], -- -#includes
313 importPaths :: [FilePath],
315 mainFunIs :: Maybe String,
316 ctxtStkDepth :: Int, -- Typechecker context stack depth
318 thisPackage :: PackageId,
321 wayNames :: [WayName], -- way flags from the cmd line
322 buildTag :: String, -- the global "way" (eg. "p" for prof)
323 rtsBuildTag :: String, -- the RTS "way"
326 objectDir :: Maybe String,
327 hiDir :: Maybe String,
328 stubDir :: Maybe String,
334 outputFile :: Maybe String,
335 outputHi :: Maybe String,
337 -- | This is set by DriverPipeline.runPipeline based on where
338 -- its output is going.
339 dumpPrefix :: Maybe FilePath,
341 -- | Override the dumpPrefix set by runPipeline.
342 -- Set by -ddump-file-prefix
343 dumpPrefixForce :: Maybe FilePath,
345 includePaths :: [String],
346 libraryPaths :: [String],
347 frameworkPaths :: [String], -- used on darwin only
348 cmdlineFrameworks :: [String], -- ditto
349 tmpDir :: String, -- no trailing '/'
351 ghcUsagePath :: FilePath, -- Filled in by SysTools
352 ghciUsagePath :: FilePath, -- ditto
354 hpcDir :: String, -- ^ path to store the .mix files
356 -- options for particular phases
365 opt_windres :: [String],
367 -- commands for particular phases
369 pgm_P :: (String,[Option]),
371 pgm_c :: (String,[Option]),
372 pgm_m :: (String,[Option]),
373 pgm_s :: (String,[Option]),
374 pgm_a :: (String,[Option]),
375 pgm_l :: (String,[Option]),
376 pgm_dll :: (String,[Option]),
378 pgm_sysman :: String,
379 pgm_windres :: String,
382 extraPkgConfs :: [FilePath],
383 topDir :: FilePath, -- filled in by SysTools
384 systemPackageConfig :: FilePath, -- ditto
385 -- The -package-conf flags given on the command line, in the order
388 packageFlags :: [PackageFlag],
389 -- The -package and -hide-package flags from the command-line
392 -- NB. do not modify this field, it is calculated by
393 -- Packages.initPackages and Packages.updatePackages.
394 pkgDatabase :: Maybe (UniqFM PackageConfig),
395 pkgState :: PackageState,
401 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
403 haddockOptions :: Maybe String
414 -- | will this target result in an object file on the disk?
415 isObjectTarget :: HscTarget -> Bool
416 isObjectTarget HscC = True
417 isObjectTarget HscAsm = True
418 isObjectTarget _ = False
420 -- | The 'GhcMode' tells us whether we're doing multi-module
421 -- compilation (controlled via the "GHC" API) or one-shot
422 -- (single-module) compilation. This makes a difference primarily to
423 -- the "Finder": in one-shot mode we look for interface files for
424 -- imported modules, but in multi-module mode we look for source files
425 -- in order to check whether they need to be recompiled.
427 = CompManager -- ^ --make, GHCi, etc.
428 | OneShot -- ^ ghc -c Foo.hs
429 | MkDepend -- ^ ghc -M, see Finder for why we need this
432 isOneShot :: GhcMode -> Bool
433 isOneShot OneShot = True
434 isOneShot _other = False
436 -- | What kind of linking to do.
437 data GhcLink -- What to do in the link step, if there is one
438 = NoLink -- Don't link at all
439 | LinkBinary -- Link object code into a binary
440 | LinkInMemory -- Use the in-memory dynamic linker
441 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
444 isNoLink :: GhcLink -> Bool
445 isNoLink NoLink = True
446 isNoLink other = False
449 = ExposePackage String
451 | IgnorePackage String
454 defaultHscTarget = defaultObjectTarget
456 -- | the 'HscTarget' value corresponding to the default way to create
457 -- object files on the current platform.
459 | cGhcWithNativeCodeGen == "YES" = HscAsm
462 initDynFlags dflags = do
463 -- someday these will be dynamic flags
464 ways <- readIORef v_Ways
465 build_tag <- readIORef v_Build_tag
466 rts_build_tag <- readIORef v_RTS_Build_tag
469 buildTag = build_tag,
470 rtsBuildTag = rts_build_tag
475 ghcMode = CompManager,
476 ghcLink = LinkBinary,
479 hscTarget = defaultHscTarget,
485 maxSimplIterations = 4,
487 specConstrThreshold = Just 200,
488 liberateCaseThreshold = Just 200,
490 cmdlineHcIncludes = [],
494 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
496 thisPackage = mainPackageId,
502 objectSuf = phaseInputExt StopLn,
503 hcSuf = phaseInputExt HCc,
506 outputFile = Nothing,
508 dumpPrefix = Nothing,
509 dumpPrefixForce = Nothing,
513 cmdlineFrameworks = [],
514 tmpDir = cDEFAULT_TMPDIR,
532 pkgDatabase = Nothing,
533 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
534 haddockOptions = Nothing,
536 Opt_ReadUserPackageConf,
538 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
539 -- behaviour the default, to see if anyone notices
543 Opt_MonomorphismRestriction,
549 Opt_PrintBindContents
551 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
552 -- The default -O0 options
555 log_action = \severity srcSpan style msg ->
557 SevInfo -> hPutStrLn stderr (show (msg style))
558 SevFatal -> hPutStrLn stderr (show (msg style))
559 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
565 0 | print errors & warnings only
566 1 | minimal verbosity: print "compiling M ... done." for each module.
567 2 | equivalent to -dshow-passes
568 3 | equivalent to existing "ghc -v"
569 4 | "ghc -v -ddump-most"
570 5 | "ghc -v -ddump-all"
573 dopt :: DynFlag -> DynFlags -> Bool
574 dopt f dflags = f `elem` (flags dflags)
576 dopt_set :: DynFlags -> DynFlag -> DynFlags
577 dopt_set dfs f = dfs{ flags = f : flags dfs }
579 dopt_unset :: DynFlags -> DynFlag -> DynFlags
580 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
582 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
583 getOpts dflags opts = reverse (opts dflags)
584 -- We add to the options from the front, so we need to reverse the list
586 getVerbFlag :: DynFlags -> String
588 | verbosity dflags >= 3 = "-v"
591 setObjectDir f d = d{ objectDir = Just f}
592 setHiDir f d = d{ hiDir = Just f}
593 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
594 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
595 -- #included from the .hc file when compiling with -fvia-C.
597 setObjectSuf f d = d{ objectSuf = f}
598 setHiSuf f d = d{ hiSuf = f}
599 setHcSuf f d = d{ hcSuf = f}
601 setOutputFile f d = d{ outputFile = f}
602 setOutputHi f d = d{ outputHi = f}
604 setDumpPrefixForce f d = d { dumpPrefixForce = f}
606 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
607 -- Config.hs should really use Option.
608 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
610 setPgmL f d = d{ pgm_L = f}
611 setPgmF f d = d{ pgm_F = f}
612 setPgmc f d = d{ pgm_c = (f,[])}
613 setPgmm f d = d{ pgm_m = (f,[])}
614 setPgms f d = d{ pgm_s = (f,[])}
615 setPgma f d = d{ pgm_a = (f,[])}
616 setPgml f d = d{ pgm_l = (f,[])}
617 setPgmdll f d = d{ pgm_dll = (f,[])}
618 setPgmwindres f d = d{ pgm_windres = f}
620 addOptL f d = d{ opt_L = f : opt_L d}
621 addOptP f d = d{ opt_P = f : opt_P d}
622 addOptF f d = d{ opt_F = f : opt_F d}
623 addOptc f d = d{ opt_c = f : opt_c d}
624 addOptm f d = d{ opt_m = f : opt_m d}
625 addOpta f d = d{ opt_a = f : opt_a d}
626 addOptl f d = d{ opt_l = f : opt_l d}
627 addOptdep f d = d{ opt_dep = f : opt_dep d}
628 addOptwindres f d = d{ opt_windres = f : opt_windres d}
630 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
632 addHaddockOpts f d = d{ haddockOptions = Just f}
634 -- -----------------------------------------------------------------------------
635 -- Command-line options
637 -- When invoking external tools as part of the compilation pipeline, we
638 -- pass these a sequence of options on the command-line. Rather than
639 -- just using a list of Strings, we use a type that allows us to distinguish
640 -- between filepaths and 'other stuff'. [The reason being, of course, that
641 -- this type gives us a handle on transforming filenames, and filenames only,
642 -- to whatever format they're expected to be on a particular platform.]
645 = FileOption -- an entry that _contains_ filename(s) / filepaths.
646 String -- a non-filepath prefix that shouldn't be
647 -- transformed (e.g., "/out=")
648 String -- the filepath/filename portion
651 -----------------------------------------------------------------------------
652 -- Setting the optimisation level
654 updOptLevel :: Int -> DynFlags -> DynFlags
655 -- Set dynflags appropriate to the optimisation level
657 = dfs2{ optLevel = final_n }
659 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
660 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
661 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
663 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
664 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
666 optLevelFlags :: [([Int], DynFlag)]
668 = [ ([0], Opt_IgnoreInterfacePragmas)
669 , ([0], Opt_OmitInterfacePragmas)
671 , ([1,2], Opt_IgnoreAsserts)
672 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
674 , ([1,2], Opt_DoEtaReduction)
675 , ([1,2], Opt_CaseMerge)
676 , ([1,2], Opt_Strictness)
678 , ([1,2], Opt_FullLaziness)
680 , ([2], Opt_LiberateCase)
681 , ([2], Opt_SpecConstr)
683 , ([0,1,2], Opt_DoLambdaEtaExpansion)
684 -- This one is important for a tiresome reason:
685 -- we want to make sure that the bindings for data
686 -- constructors are eta-expanded. This is probably
687 -- a good thing anyway, but it seems fragile.
690 -- -----------------------------------------------------------------------------
691 -- Standard sets of warning options
694 = [ Opt_WarnDeprecations,
695 Opt_WarnOverlappingPatterns,
696 Opt_WarnMissingFields,
697 Opt_WarnMissingMethods,
698 Opt_WarnDuplicateExports
702 = standardWarnings ++
703 [ Opt_WarnUnusedBinds,
704 Opt_WarnUnusedMatches,
705 Opt_WarnUnusedImports,
706 Opt_WarnIncompletePatterns,
712 [ Opt_WarnTypeDefaults,
713 Opt_WarnNameShadowing,
719 -- minuswRemovesOpts should be every warning option
722 [Opt_WarnImplicitPrelude,
723 Opt_WarnIncompletePatternsRecUpd,
724 Opt_WarnSimplePatterns,
725 Opt_WarnMonomorphism,
729 -- -----------------------------------------------------------------------------
730 -- CoreToDo: abstraction of core-to-core passes to run.
732 data CoreToDo -- These are diff core-to-core passes,
733 -- which may be invoked in any order,
734 -- as many times as you like.
736 = CoreDoSimplify -- The core-to-core simplifier.
739 -- Each run of the simplifier can take a different
740 -- set of simplifier-specific flags.
742 | CoreDoFloatOutwards FloatOutSwitches
747 | CoreDoWorkerWrapper
750 | CoreDoOldStrictness
753 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
754 -- matching this string
755 | CoreDoVectorisation
756 | CoreDoNothing -- Useful when building up
757 | CoreDoPasses [CoreToDo] -- lists of these things
759 data SimplifierMode -- See comments in SimplMonad
763 data SimplifierSwitch
764 = MaxSimplifierIterations Int
767 data FloatOutSwitches
768 = FloatOutSw Bool -- True <=> float lambdas to top level
769 Bool -- True <=> float constants to top level,
770 -- even if they do not escape a lambda
773 -- The core-to-core pass ordering is derived from the DynFlags:
774 runWhen :: Bool -> CoreToDo -> CoreToDo
775 runWhen True do_this = do_this
776 runWhen False do_this = CoreDoNothing
778 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
779 runMaybe (Just x) f = f x
780 runMaybe Nothing _ = CoreDoNothing
782 getCoreToDo :: DynFlags -> [CoreToDo]
784 | Just todo <- coreToDo dflags = todo -- set explicitly by user
785 | otherwise = core_todo
787 opt_level = optLevel dflags
788 phases = simplPhases dflags
789 max_iter = maxSimplIterations dflags
790 strictness = dopt Opt_Strictness dflags
791 full_laziness = dopt Opt_FullLaziness dflags
792 cse = dopt Opt_CSE dflags
793 spec_constr = dopt Opt_SpecConstr dflags
794 liberate_case = dopt Opt_LiberateCase dflags
795 rule_check = ruleCheck dflags
796 vectorisation = dopt Opt_Vectorise dflags
798 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
800 simpl_phase phase iter = CoreDoPasses
801 [ CoreDoSimplify (SimplPhase phase) [
802 MaxSimplifierIterations iter
804 maybe_rule_check phase
807 -- By default, we have 2 phases before phase 0.
809 -- Want to run with inline phase 2 after the specialiser to give
810 -- maximum chance for fusion to work before we inline build/augment
811 -- in phase 1. This made a difference in 'ansi' where an
812 -- overloaded function wasn't inlined till too late.
814 -- Need phase 1 so that build/augment get
815 -- inlined. I found that spectral/hartel/genfft lost some useful
816 -- strictness in the function sumcode' if augment is not inlined
817 -- before strictness analysis runs
818 simpl_phases = CoreDoPasses [ simpl_phase phase max_iter
819 | phase <- [phases, phases-1 .. 1] ]
822 -- initial simplify: mk specialiser happy: minimum effort please
823 simpl_gently = CoreDoSimplify SimplGently [
825 -- Don't inline anything till full laziness has bitten
826 -- In particular, inlining wrappers inhibits floating
827 -- e.g. ...(case f x of ...)...
828 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
829 -- ==> ...(case x of I# x# -> case fw x# of ...)...
830 -- and now the redex (f x) isn't floatable any more
831 -- Similarly, don't apply any rules until after full
832 -- laziness. Notably, list fusion can prevent floating.
834 NoCaseOfCase, -- Don't do case-of-case transformations.
835 -- This makes full laziness work better
836 MaxSimplifierIterations max_iter
840 if opt_level == 0 then
841 [simpl_phase 0 max_iter]
842 else {- opt_level >= 1 -} [
844 -- initial simplify: mk specialiser happy: minimum effort please
847 -- We run vectorisation here for now, but we might also try to run
849 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
851 -- Specialisation is best done before full laziness
852 -- so that overloaded functions have all their dictionary lambdas manifest
855 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
861 -- Phase 0: allow all Ids to be inlined now
862 -- This gets foldr inlined before strictness analysis
864 -- At least 3 iterations because otherwise we land up with
865 -- huge dead expressions because of an infelicity in the
867 -- let k = BIG in foldr k z xs
868 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
869 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
871 simpl_phase 0 (max max_iter 3),
874 #ifdef OLD_STRICTNESS
877 runWhen strictness (CoreDoPasses [
881 simpl_phase 0 max_iter
884 runWhen full_laziness
885 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
886 True)), -- Float constants
887 -- nofib/spectral/hartel/wang doubles in speed if you
888 -- do full laziness late in the day. It only happens
889 -- after fusion and other stuff, so the early pass doesn't
890 -- catch it. For the record, the redex is
891 -- f_el22 (f_el21 r_midblock)
895 -- We want CSE to follow the final full-laziness pass, because it may
896 -- succeed in commoning up things floated out by full laziness.
897 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
903 -- Case-liberation for -O2. This should be after
904 -- strictness analysis and the simplification which follows it.
905 runWhen liberate_case (CoreDoPasses [
907 simpl_phase 0 max_iter
908 ]), -- Run the simplifier after LiberateCase to vastly
909 -- reduce the possiblility of shadowing
910 -- Reason: see Note [Shadowing] in SpecConstr.lhs
912 runWhen spec_constr CoreDoSpecConstr,
916 -- Final clean-up simplification:
917 simpl_phase 0 max_iter
920 -- -----------------------------------------------------------------------------
921 -- StgToDo: abstraction of stg-to-stg passes to run.
924 = StgDoMassageForProfiling -- should be (next to) last
925 -- There's also setStgVarInfo, but its absolute "lastness"
926 -- is so critical that it is hardwired in (no flag).
929 getStgToDo :: DynFlags -> [StgToDo]
931 | Just todo <- stgToDo dflags = todo -- set explicitly by user
934 stg_stats = dopt Opt_StgStats dflags
936 todo1 = if stg_stats then [D_stg_stats] else []
938 todo2 | WayProf `elem` wayNames dflags
939 = StgDoMassageForProfiling : todo1
943 -- -----------------------------------------------------------------------------
947 allFlags = map ('-':) $
948 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
949 map ("fno-"++) flags ++
953 where ok (PrefixPred _ _) = False
955 flags = map fst fFlags
958 dynamic_flags :: [(String, OptKind DynP)]
960 ( "n" , NoArg (setDynFlag Opt_DryRun) )
961 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
962 , ( "F" , NoArg (setDynFlag Opt_Pp))
963 , ( "#include" , HasArg (addCmdlineHCInclude) )
964 , ( "v" , OptIntSuffix setVerbosity )
966 ------- Specific phases --------------------------------------------
967 , ( "pgmL" , HasArg (upd . setPgmL) )
968 , ( "pgmP" , HasArg (upd . setPgmP) )
969 , ( "pgmF" , HasArg (upd . setPgmF) )
970 , ( "pgmc" , HasArg (upd . setPgmc) )
971 , ( "pgmm" , HasArg (upd . setPgmm) )
972 , ( "pgms" , HasArg (upd . setPgms) )
973 , ( "pgma" , HasArg (upd . setPgma) )
974 , ( "pgml" , HasArg (upd . setPgml) )
975 , ( "pgmdll" , HasArg (upd . setPgmdll) )
976 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
978 , ( "optL" , HasArg (upd . addOptL) )
979 , ( "optP" , HasArg (upd . addOptP) )
980 , ( "optF" , HasArg (upd . addOptF) )
981 , ( "optc" , HasArg (upd . addOptc) )
982 , ( "optm" , HasArg (upd . addOptm) )
983 , ( "opta" , HasArg (upd . addOpta) )
984 , ( "optl" , HasArg (upd . addOptl) )
985 , ( "optdep" , HasArg (upd . addOptdep) )
986 , ( "optwindres" , HasArg (upd . addOptwindres) )
988 , ( "split-objs" , NoArg (if can_split
989 then setDynFlag Opt_SplitObjs
992 -------- Linking ----------------------------------------------------
993 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
994 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
995 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
997 ------- Libraries ---------------------------------------------------
998 , ( "L" , Prefix addLibraryPath )
999 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1001 ------- Frameworks --------------------------------------------------
1002 -- -framework-path should really be -F ...
1003 , ( "framework-path" , HasArg addFrameworkPath )
1004 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1006 ------- Output Redirection ------------------------------------------
1007 , ( "odir" , HasArg (upd . setObjectDir))
1008 , ( "o" , SepArg (upd . setOutputFile . Just))
1009 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1010 , ( "osuf" , HasArg (upd . setObjectSuf))
1011 , ( "hcsuf" , HasArg (upd . setHcSuf))
1012 , ( "hisuf" , HasArg (upd . setHiSuf))
1013 , ( "hidir" , HasArg (upd . setHiDir))
1014 , ( "tmpdir" , HasArg (upd . setTmpDir))
1015 , ( "stubdir" , HasArg (upd . setStubDir))
1016 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1018 ------- Keeping temporary files -------------------------------------
1019 -- These can be singular (think ghc -c) or plural (think ghc --make)
1020 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1021 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1022 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1023 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1024 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1025 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1026 -- This only makes sense as plural
1027 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1029 ------- Miscellaneous ----------------------------------------------
1030 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1031 , ( "main-is" , SepArg setMainIs )
1032 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1033 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1034 , ( "hpcdir" , SepArg setOptHpcDir )
1036 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1037 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1038 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1040 ------- Packages ----------------------------------------------------
1041 , ( "package-conf" , HasArg extraPkgConf_ )
1042 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1043 , ( "package-name" , HasArg (upd . setPackageName) )
1044 , ( "package" , HasArg exposePackage )
1045 , ( "hide-package" , HasArg hidePackage )
1046 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1047 , ( "ignore-package" , HasArg ignorePackage )
1048 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1050 ------ HsCpp opts ---------------------------------------------------
1051 , ( "D", AnySuffix (upd . addOptP) )
1052 , ( "U", AnySuffix (upd . addOptP) )
1054 ------- Include/Import Paths ----------------------------------------
1055 , ( "I" , Prefix addIncludePath)
1056 , ( "i" , OptPrefix addImportPath )
1058 ------ Debugging ----------------------------------------------------
1059 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1061 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1062 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1063 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1064 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1065 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1066 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1067 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1068 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1069 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1070 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1071 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1072 , ( "ddump-asm-regalloc-stages",
1073 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1074 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1075 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1076 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1077 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1078 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1079 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1080 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1081 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1082 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1083 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1084 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1085 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1086 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1087 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1088 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1089 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1090 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1091 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1092 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1093 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1094 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1095 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1096 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1097 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1098 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1099 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1100 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1101 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1102 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1103 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1104 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1105 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1106 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1107 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1108 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1109 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1110 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1111 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1112 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1113 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1114 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1115 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1116 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1117 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1118 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1119 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1120 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1121 setVerbosity (Just 2)) )
1122 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1124 ------ Machine dependant (-m<blah>) stuff ---------------------------
1126 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1127 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1128 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1130 ------ Warning opts -------------------------------------------------
1131 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1132 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1133 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1134 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1135 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1136 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1138 ------ Optimisation flags ------------------------------------------
1139 , ( "O" , NoArg (upd (setOptLevel 1)))
1140 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1141 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1142 -- If the number is missing, use 1
1144 , ( "fsimplifier-phases", IntSuffix (\n ->
1145 upd (\dfs -> dfs{ simplPhases = n })) )
1146 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1147 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1149 , ( "fspec-constr-threshold", IntSuffix (\n ->
1150 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1151 , ( "fno-spec-constr-threshold", NoArg (
1152 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1153 , ( "fliberate-case-threshold", IntSuffix (\n ->
1154 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1155 , ( "fno-liberate-case-threshold", NoArg (
1156 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1158 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1159 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1161 ------ Compiler flags -----------------------------------------------
1163 , ( "fasm", NoArg (setObjTarget HscAsm) )
1164 , ( "fvia-c", NoArg (setObjTarget HscC) )
1165 , ( "fvia-C", NoArg (setObjTarget HscC) )
1167 , ( "fno-code", NoArg (setTarget HscNothing))
1168 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1169 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1171 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1172 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1174 -- the rest of the -f* and -fno-* flags
1175 , ( "f", PrefixPred (isFlag fFlags)
1176 (\f -> setDynFlag (getFlag fFlags f)) )
1177 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1178 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1180 -- the -X* and -XNo* flags
1181 , ( "X", PrefixPred (isFlag xFlags)
1182 (\f -> setDynFlag (getFlag xFlags f)) )
1183 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1184 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1187 -- these -f<blah> flags can all be reversed with -fno-<blah>
1190 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1191 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1192 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1193 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1194 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1195 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1196 ( "warn-missing-fields", Opt_WarnMissingFields ),
1197 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1198 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1199 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1200 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1201 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1202 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1203 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1204 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1205 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1206 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1207 ( "warn-deprecations", Opt_WarnDeprecations ),
1208 ( "warn-orphans", Opt_WarnOrphans ),
1209 ( "warn-tabs", Opt_WarnTabs ),
1210 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1211 ( "strictness", Opt_Strictness ),
1212 ( "full-laziness", Opt_FullLaziness ),
1213 ( "liberate-case", Opt_LiberateCase ),
1214 ( "spec-constr", Opt_SpecConstr ),
1216 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1217 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1218 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1219 ( "ignore-asserts", Opt_IgnoreAsserts ),
1220 ( "do-eta-reduction", Opt_DoEtaReduction ),
1221 ( "case-merge", Opt_CaseMerge ),
1222 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1223 ( "dicts-cheap", Opt_DictsCheap ),
1224 ( "excess-precision", Opt_ExcessPrecision ),
1225 ( "asm-mangling", Opt_DoAsmMangling ),
1226 ( "print-bind-result", Opt_PrintBindResult ),
1227 ( "force-recomp", Opt_ForceRecomp ),
1228 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1229 ( "rewrite-rules", Opt_RewriteRules ),
1230 ( "break-on-exception", Opt_BreakOnException ),
1231 ( "break-on-error", Opt_BreakOnError ),
1232 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1233 ( "print-bind-contents", Opt_PrintBindContents ),
1234 ( "run-cps", Opt_RunCPSZ ),
1235 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1236 ( "vectorise", Opt_Vectorise ),
1237 ( "regs-graph", Opt_RegsGraph),
1238 ( "regs-iterative", Opt_RegsIterative),
1239 -- Deprecated in favour of -XTemplateHaskell:
1240 ( "th", Opt_TemplateHaskell ),
1241 -- Deprecated in favour of -XForeignFunctionInterface:
1242 ( "fi", Opt_ForeignFunctionInterface ),
1243 -- Deprecated in favour of -XForeignFunctionInterface:
1244 ( "ffi", Opt_ForeignFunctionInterface ),
1245 -- Deprecated in favour of -XArrows:
1246 ( "arrows", Opt_Arrows ),
1247 -- Deprecated in favour of -XGenerics:
1248 ( "generics", Opt_Generics ),
1249 -- Deprecated in favour of -XImplicitPrelude:
1250 ( "implicit-prelude", Opt_ImplicitPrelude ),
1251 -- Deprecated in favour of -XBangPatterns:
1252 ( "bang-patterns", Opt_BangPatterns ),
1253 -- Deprecated in favour of -XMonomorphismRestriction:
1254 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1255 -- Deprecated in favour of -XMonoPatBinds:
1256 ( "mono-pat-binds", Opt_MonoPatBinds ),
1257 -- Deprecated in favour of -XExtendedDefaultRules:
1258 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1259 -- Deprecated in favour of -XImplicitParams:
1260 ( "implicit-params", Opt_ImplicitParams ),
1261 -- Deprecated in favour of -XScopedTypeVariables:
1262 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1263 -- Deprecated in favour of -XPArr:
1264 ( "parr", Opt_PArr ),
1265 -- Deprecated in favour of -XOverlappingInstances:
1266 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1267 -- Deprecated in favour of -XUndecidableInstances:
1268 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1269 -- Deprecated in favour of -XIncoherentInstances:
1270 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1271 ( "gen-manifest", Opt_GenManifest ),
1272 ( "embed-manifest", Opt_EmbedManifest )
1275 supportedLanguages :: [String]
1276 supportedLanguages = map fst xFlags
1278 -- These -X<blah> flags can all be reversed with -XNo<blah>
1279 xFlags :: [(String, DynFlag)]
1282 ( "PatternGuards", Opt_PatternGuards ),
1283 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1284 ( "MagicHash", Opt_MagicHash ),
1285 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1286 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1287 ( "KindSignatures", Opt_KindSignatures ),
1288 ( "PatternSignatures", Opt_PatternSignatures ),
1289 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1290 ( "ParallelListComp", Opt_ParallelListComp ),
1291 ( "TransformListComp", Opt_TransformListComp ),
1292 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1293 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1294 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1295 ( "Rank2Types", Opt_Rank2Types ),
1296 ( "RankNTypes", Opt_RankNTypes ),
1297 ( "ImpredicativeTypes", Opt_ImpredicativeTypes ),
1298 ( "TypeOperators", Opt_TypeOperators ),
1299 ( "RecursiveDo", Opt_RecursiveDo ),
1300 ( "Arrows", Opt_Arrows ),
1301 ( "PArr", Opt_PArr ),
1302 ( "TemplateHaskell", Opt_TemplateHaskell ),
1303 ( "Generics", Opt_Generics ),
1305 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1306 ( "RecordWildCards", Opt_RecordWildCards ),
1307 ( "RecordPuns", Opt_RecordPuns ),
1308 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1309 ( "OverloadedStrings", Opt_OverloadedStrings ),
1310 ( "GADTs", Opt_GADTs ),
1311 ( "ViewPatterns", Opt_ViewPatterns),
1312 ( "TypeFamilies", Opt_TypeFamilies ),
1313 ( "BangPatterns", Opt_BangPatterns ),
1315 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1316 -- On by default (which is not strictly H98):
1317 ( "MonoPatBinds", Opt_MonoPatBinds ),
1318 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1319 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1320 ( "ImplicitParams", Opt_ImplicitParams ),
1321 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1322 ( "UnboxedTuples", Opt_UnboxedTuples ),
1323 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1324 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1325 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1326 ( "FlexibleContexts", Opt_FlexibleContexts ),
1327 ( "FlexibleInstances", Opt_FlexibleInstances ),
1328 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1329 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1330 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1331 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1332 ( "OverlappingInstances", Opt_OverlappingInstances ),
1333 ( "UndecidableInstances", Opt_UndecidableInstances ),
1334 ( "IncoherentInstances", Opt_IncoherentInstances )
1337 impliedFlags :: [(DynFlag, [DynFlag])]
1339 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1340 -- be completely rigid for GADTs
1341 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1342 -- Note [Scoped tyvars] in TcBinds
1345 glasgowExtsFlags = [
1346 Opt_PrintExplicitForalls
1347 , Opt_ForeignFunctionInterface
1348 , Opt_UnliftedFFITypes
1350 , Opt_ImplicitParams
1351 , Opt_ScopedTypeVariables
1353 , Opt_TypeSynonymInstances
1354 , Opt_StandaloneDeriving
1355 , Opt_DeriveDataTypeable
1356 , Opt_FlexibleContexts
1357 , Opt_FlexibleInstances
1358 , Opt_ConstrainedClassMethods
1359 , Opt_MultiParamTypeClasses
1360 , Opt_FunctionalDependencies
1362 , Opt_PolymorphicComponents
1363 , Opt_ExistentialQuantification
1366 , Opt_LiberalTypeSynonyms
1368 , Opt_ImpredicativeTypes
1371 , Opt_ParallelListComp
1372 , Opt_EmptyDataDecls
1373 , Opt_KindSignatures
1374 , Opt_PatternSignatures
1375 , Opt_GeneralizedNewtypeDeriving
1376 , Opt_TypeFamilies ]
1379 isFlag :: [(String,a)] -> String -> Bool
1380 isFlag flags f = any (\(ff,_) -> ff == f) flags
1382 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1383 isPrefFlag pref flags no_f
1384 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1388 getFlag :: [(String,a)] -> String -> a
1389 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1391 [] -> panic ("get_flag " ++ f)
1393 getPrefFlag :: String -> [(String,a)] -> String -> a
1394 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1395 -- We should only be passed flags which match the prefix
1397 -- -----------------------------------------------------------------------------
1398 -- Parsing the dynamic flags.
1400 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1401 parseDynamicFlags dflags args = do
1402 let ((leftover,errs),dflags')
1403 = runCmdLine (processArgs dynamic_flags args) dflags
1404 when (not (null errs)) $ do
1405 throwDyn (UsageError (unlines errs))
1406 return (dflags', leftover)
1409 type DynP = CmdLineP DynFlags
1411 upd :: (DynFlags -> DynFlags) -> DynP ()
1413 dfs <- getCmdLineState
1414 putCmdLineState $! (f dfs)
1416 --------------------------
1417 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1418 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1420 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1421 -- When you set f, set the ones it implies
1422 -- When you un-set f, however, we don't un-set the things it implies
1423 -- (except for -fno-glasgow-exts, which is treated specially)
1425 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1427 --------------------------
1428 setDumpFlag :: DynFlag -> OptKind DynP
1429 setDumpFlag dump_flag
1430 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1431 -- Whenver we -ddump, switch off the recompilation checker,
1432 -- else you don't see the dump!
1434 setVerbosity :: Maybe Int -> DynP ()
1435 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1437 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1439 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1442 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1444 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1446 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1449 | Nothing <- unpackPackageId pid
1450 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1452 = \s -> s{ thisPackage = pid }
1454 pid = stringToPackageId p
1456 -- If we're linking a binary, then only targets that produce object
1457 -- code are allowed (requests for other target types are ignored).
1458 setTarget l = upd set
1461 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1464 -- Changes the target only if we're compiling object code. This is
1465 -- used by -fasm and -fvia-C, which switch from one to the other, but
1466 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1467 -- can be safely used in an OPTIONS_GHC pragma.
1468 setObjTarget l = upd set
1471 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1474 setOptLevel :: Int -> DynFlags -> DynFlags
1475 setOptLevel n dflags
1476 | hscTarget dflags == HscInterpreted && n > 0
1478 -- not in IO any more, oh well:
1479 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1481 = updOptLevel n dflags
1484 setMainIs :: String -> DynP ()
1486 | not (null main_fn) && isLower (head main_fn)
1487 -- The arg looked like "Foo.Bar.baz"
1488 = upd $ \d -> d{ mainFunIs = Just main_fn,
1489 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1491 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1492 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1494 | otherwise -- The arg looked like "baz"
1495 = upd $ \d -> d{ mainFunIs = Just arg }
1497 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1499 -----------------------------------------------------------------------------
1500 -- Paths & Libraries
1502 -- -i on its own deletes the import paths
1503 addImportPath "" = upd (\s -> s{importPaths = []})
1504 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1508 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1511 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1513 addFrameworkPath p =
1514 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1516 split_marker = ':' -- not configurable (ToDo)
1518 splitPathList :: String -> [String]
1519 splitPathList s = filter notNull (splitUp s)
1520 -- empty paths are ignored: there might be a trailing
1521 -- ':' in the initial list, for example. Empty paths can
1522 -- cause confusion when they are translated into -I options
1523 -- for passing to gcc.
1525 #ifndef mingw32_TARGET_OS
1526 splitUp xs = split split_marker xs
1528 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1530 -- That is, if "foo:bar:baz" is used, this interpreted as
1531 -- consisting of three entries, 'foo', 'bar', 'baz'.
1532 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1533 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1535 -- Notice that no attempt is made to fully replace the 'standard'
1536 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1537 -- that this will cause too much breakage for users & ':' will
1538 -- work fine even with DOS paths, if you're not insisting on being silly.
1541 splitUp (x:':':div:xs) | div `elem` dir_markers
1542 = ((x:':':div:p): splitUp rs)
1544 (p,rs) = findNextPath xs
1545 -- we used to check for existence of the path here, but that
1546 -- required the IO monad to be threaded through the command-line
1547 -- parser which is quite inconvenient. The
1548 splitUp xs = cons p (splitUp rs)
1550 (p,rs) = findNextPath xs
1555 -- will be called either when we've consumed nought or the
1556 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1557 -- finding the next split marker.
1559 case break (`elem` split_markers) xs of
1560 (p, d:ds) -> (p, ds)
1563 split_markers :: [Char]
1564 split_markers = [':', ';']
1566 dir_markers :: [Char]
1567 dir_markers = ['/', '\\']
1570 -- -----------------------------------------------------------------------------
1571 -- tmpDir, where we store temporary files.
1573 setTmpDir :: FilePath -> DynFlags -> DynFlags
1574 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1576 #if !defined(mingw32_HOST_OS)
1577 canonicalise p = normalise p
1579 -- Canonicalisation of temp path under win32 is a bit more
1580 -- involved: (a) strip trailing slash,
1581 -- (b) normalise slashes
1582 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1583 canonicalise path = removeTrailingSlash $ normalise $ xltCygdrive path
1585 -- if we're operating under cygwin, and TMP/TEMP is of
1586 -- the form "/cygdrive/drive/path", translate this to
1587 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1588 -- understand /cygdrive paths.)
1589 cygdrivePrefix = [pathSeparator] ++ "/cygdrive/" ++ [pathSeparator]
1590 xltCygdrive path = case maybePrefixMatch cygdrivePrefix path of
1592 | isPathSeparator sep -> drive:':':pathSeparator:xs
1595 -- strip the trailing backslash (awful, but we only do this once).
1596 removeTrailingSlash path
1597 | isPathSeparator (last path) = init path
1601 -----------------------------------------------------------------------------
1604 setOptHpcDir :: String -> DynP ()
1605 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1607 -----------------------------------------------------------------------------
1608 -- Via-C compilation stuff
1610 -- There are some options that we need to pass to gcc when compiling
1611 -- Haskell code via C, but are only supported by recent versions of
1612 -- gcc. The configure script decides which of these options we need,
1613 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1614 -- read before each via-C compilation. The advantage of having these
1615 -- in a separate file is that the file can be created at install-time
1616 -- depending on the available gcc version, and even re-generated later
1617 -- if gcc is upgraded.
1619 -- The options below are not dependent on the version of gcc, only the
1622 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1623 [String]) -- for registerised HC compilations
1624 machdepCCOpts dflags
1625 #if alpha_TARGET_ARCH
1627 #ifdef HAVE_THREADED_RTS_SUPPORT
1631 -- For now, to suppress the gcc warning "call-clobbered
1632 -- register used for global register variable", we simply
1633 -- disable all warnings altogether using the -w flag. Oh well.
1635 #elif hppa_TARGET_ARCH
1636 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1637 -- (very nice, but too bad the HP /usr/include files don't agree.)
1638 = ( ["-D_HPUX_SOURCE"], [] )
1640 #elif m68k_TARGET_ARCH
1641 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1642 -- popping of args to routines to be explicit; if we let things
1643 -- be deferred 'til after an STGJUMP, imminent death is certain!
1645 -- -fomit-frame-pointer : *don't*
1646 -- It's better to have a6 completely tied up being a frame pointer
1647 -- rather than let GCC pick random things to do with it.
1648 -- (If we want to steal a6, then we would try to do things
1649 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1650 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1652 #elif i386_TARGET_ARCH
1653 -- -fno-defer-pop : basically the same game as for m68k
1655 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1656 -- the fp (%ebp) for our register maps.
1657 = let n_regs = stolen_x86_regs dflags
1660 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1661 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1664 "-fomit-frame-pointer",
1665 -- we want -fno-builtin, because when gcc inlines
1666 -- built-in functions like memcpy() it tends to
1667 -- run out of registers, requiring -monly-n-regs
1669 "-DSTOLEN_X86_REGS="++show n_regs ]
1672 #elif ia64_TARGET_ARCH
1673 = ( [], ["-fomit-frame-pointer", "-G0"] )
1675 #elif x86_64_TARGET_ARCH
1676 = ( [], ["-fomit-frame-pointer",
1677 "-fno-asynchronous-unwind-tables",
1678 -- the unwind tables are unnecessary for HC code,
1679 -- and get in the way of -split-objs. Another option
1680 -- would be to throw them away in the mangler, but this
1683 -- calling builtins like strlen() using the FFI can
1684 -- cause gcc to run out of regs, so use the external
1688 #elif sparc_TARGET_ARCH
1690 -- For now, to suppress the gcc warning "call-clobbered
1691 -- register used for global register variable", we simply
1692 -- disable all warnings altogether using the -w flag. Oh well.
1694 #elif powerpc_apple_darwin_TARGET
1696 -- Disable Apple's precompiling preprocessor. It's a great thing
1697 -- for "normal" programs, but it doesn't support register variable
1699 = ( [], ["-no-cpp-precomp"] )
1704 picCCOpts :: DynFlags -> [String]
1706 #if darwin_TARGET_OS
1707 -- Apple prefers to do things the other way round.
1708 -- PIC is on by default.
1709 -- -mdynamic-no-pic:
1710 -- Turn off PIC code generation.
1712 -- Don't generate "common" symbols - these are unwanted
1713 -- in dynamic libraries.
1716 = ["-fno-common", "-D__PIC__"]
1718 = ["-mdynamic-no-pic"]
1719 #elif mingw32_TARGET_OS
1720 -- no -fPIC for Windows
1727 = ["-fPIC", "-D__PIC__"]
1732 -- -----------------------------------------------------------------------------
1736 can_split = cSplitObjs == "YES"
1738 -- -----------------------------------------------------------------------------
1741 compilerInfo :: [(String, String)]
1742 compilerInfo = [("Project name", cProjectName),
1743 ("Project version", cProjectVersion),
1744 ("Booter version", cBooterVersion),
1746 ("Interface file version", cHscIfaceFileVersion),
1747 ("Have interpreter", cGhcWithInterpreter),
1748 ("Object splitting", cSplitObjs),
1749 ("Have native code generator", cGhcWithNativeCodeGen),
1750 ("Support SMP", cGhcWithSMP),
1751 ("Unregisterised", cGhcUnregisterised),
1752 ("Tables next to code", cGhcEnableTablesNextToCode),
1753 ("Win32 DLLs", cEnableWin32DLLs),
1754 ("RTS ways", cGhcRTSWays),
1755 ("Leading underscore", cLeadingUnderscore)]