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,
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 -- -----------------------------------------------------------------------------
105 | Opt_D_dump_cmmz_pretty
109 | Opt_D_dump_asm_native
110 | Opt_D_dump_asm_liveness
111 | Opt_D_dump_asm_coalesce
112 | Opt_D_dump_asm_regalloc
113 | Opt_D_dump_asm_regalloc_stages
114 | Opt_D_dump_asm_conflicts
115 | Opt_D_dump_asm_stats
121 | Opt_D_dump_inlinings
122 | Opt_D_dump_rule_firings
123 | Opt_D_dump_occur_anal
127 | Opt_D_dump_simpl_iterations
136 | Opt_D_dump_worker_wrapper
137 | Opt_D_dump_rn_trace
138 | Opt_D_dump_rn_stats
140 | Opt_D_dump_simpl_stats
141 | Opt_D_dump_tc_trace
142 | Opt_D_dump_if_trace
148 | Opt_D_verbose_core2core
149 | Opt_D_verbose_stg2stg
151 | Opt_D_dump_hi_diffs
152 | Opt_D_dump_minimal_imports
153 | Opt_D_dump_mod_cycles
154 | Opt_D_faststring_stats
155 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
161 | Opt_WarnIsError -- -Werror; makes warnings fatal
162 | Opt_WarnDuplicateExports
164 | Opt_WarnImplicitPrelude
165 | Opt_WarnIncompletePatterns
166 | Opt_WarnIncompletePatternsRecUpd
167 | Opt_WarnMissingFields
168 | Opt_WarnMissingMethods
169 | Opt_WarnMissingSigs
170 | Opt_WarnNameShadowing
171 | Opt_WarnOverlappingPatterns
172 | Opt_WarnSimplePatterns
173 | Opt_WarnTypeDefaults
174 | Opt_WarnMonomorphism
175 | Opt_WarnUnusedBinds
176 | Opt_WarnUnusedImports
177 | Opt_WarnUnusedMatches
178 | Opt_WarnDeprecations
179 | Opt_WarnDodgyImports
184 | Opt_OverlappingInstances
185 | Opt_UndecidableInstances
186 | Opt_IncoherentInstances
187 | Opt_MonomorphismRestriction
189 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
190 | Opt_ForeignFunctionInterface
191 | Opt_UnliftedFFITypes
192 | Opt_PArr -- Syntactic support for parallel arrays
193 | Opt_Arrows -- Arrow-notation syntax
194 | Opt_TemplateHaskell
197 | Opt_ImplicitPrelude
198 | Opt_ScopedTypeVariables
202 | Opt_OverloadedStrings
203 | Opt_DisambiguateRecordFields
204 | Opt_RecordWildCards
208 | Opt_StandaloneDeriving
209 | Opt_DeriveDataTypeable
210 | Opt_TypeSynonymInstances
211 | Opt_FlexibleContexts
212 | Opt_FlexibleInstances
213 | Opt_ConstrainedClassMethods
214 | Opt_MultiParamTypeClasses
215 | Opt_FunctionalDependencies
217 | Opt_PolymorphicComponents
218 | Opt_ExistentialQuantification
222 | Opt_PatternSignatures
223 | Opt_ParallelListComp
224 | Opt_GeneralizedNewtypeDeriving
227 | Opt_LiberalTypeSynonyms
232 | Opt_PrintExplicitForalls
240 | Opt_IgnoreInterfacePragmas
241 | Opt_OmitInterfacePragmas
242 | Opt_DoLambdaEtaExpansion
244 | Opt_IgnoreBreakpoints
247 | Opt_UnboxStrictFields
251 | Opt_RegsGraph -- do graph coloring register allocation
252 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
260 | Opt_ExcessPrecision
261 | Opt_ReadUserPackageConf
265 | Opt_HideAllPackages
266 | Opt_PrintBindResult
269 | Opt_BreakOnException
271 | Opt_PrintEvldWithShow
275 | Opt_ConvertToZipCfgAndBack
286 data DynFlags = DynFlags {
289 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
290 stgToDo :: Maybe [StgToDo], -- similarly
291 hscTarget :: HscTarget,
292 hscOutName :: String, -- name of the output file
293 extCoreName :: String, -- name of the .core output file
294 verbosity :: Int, -- verbosity level
295 optLevel :: Int, -- optimisation level
296 maxSimplIterations :: Int, -- max simplifier iterations
297 ruleCheck :: Maybe String,
299 specThreshold :: Int, -- Threshold for function specialisation
301 stolen_x86_regs :: Int,
302 cmdlineHcIncludes :: [String], -- -#includes
303 importPaths :: [FilePath],
305 mainFunIs :: Maybe String,
306 ctxtStkDepth :: Int, -- Typechecker context stack depth
308 thisPackage :: PackageId,
311 wayNames :: [WayName], -- way flags from the cmd line
312 buildTag :: String, -- the global "way" (eg. "p" for prof)
313 rtsBuildTag :: String, -- the RTS "way"
316 objectDir :: Maybe String,
317 hiDir :: Maybe String,
318 stubDir :: Maybe String,
324 outputFile :: Maybe String,
325 outputHi :: Maybe String,
327 -- | This is set by DriverPipeline.runPipeline based on where
328 -- its output is going.
329 dumpPrefix :: Maybe FilePath,
331 -- | Override the dumpPrefix set by runPipeline.
332 -- Set by -ddump-file-prefix
333 dumpPrefixForce :: Maybe FilePath,
335 includePaths :: [String],
336 libraryPaths :: [String],
337 frameworkPaths :: [String], -- used on darwin only
338 cmdlineFrameworks :: [String], -- ditto
339 tmpDir :: String, -- no trailing '/'
341 ghcUsagePath :: FilePath, -- Filled in by SysTools
342 ghciUsagePath :: FilePath, -- ditto
344 hpcDir :: String, -- ^ path to store the .mix files
346 -- options for particular phases
355 opt_windres :: [String],
357 -- commands for particular phases
359 pgm_P :: (String,[Option]),
361 pgm_c :: (String,[Option]),
362 pgm_m :: (String,[Option]),
363 pgm_s :: (String,[Option]),
364 pgm_a :: (String,[Option]),
365 pgm_l :: (String,[Option]),
366 pgm_dll :: (String,[Option]),
368 pgm_sysman :: String,
369 pgm_windres :: String,
372 extraPkgConfs :: [FilePath],
373 topDir :: FilePath, -- filled in by SysTools
374 systemPackageConfig :: FilePath, -- ditto
375 -- The -package-conf flags given on the command line, in the order
378 packageFlags :: [PackageFlag],
379 -- The -package and -hide-package flags from the command-line
382 -- NB. do not modify this field, it is calculated by
383 -- Packages.initPackages and Packages.updatePackages.
384 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
385 pkgState :: PackageState,
391 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
402 -- | will this target result in an object file on the disk?
403 isObjectTarget :: HscTarget -> Bool
404 isObjectTarget HscC = True
405 isObjectTarget HscAsm = True
406 isObjectTarget _ = False
408 -- | The 'GhcMode' tells us whether we're doing multi-module
409 -- compilation (controlled via the "GHC" API) or one-shot
410 -- (single-module) compilation. This makes a difference primarily to
411 -- the "Finder": in one-shot mode we look for interface files for
412 -- imported modules, but in multi-module mode we look for source files
413 -- in order to check whether they need to be recompiled.
415 = CompManager -- ^ --make, GHCi, etc.
416 | OneShot -- ^ ghc -c Foo.hs
417 | MkDepend -- ^ ghc -M, see Finder for why we need this
420 isOneShot :: GhcMode -> Bool
421 isOneShot OneShot = True
422 isOneShot _other = False
424 -- | What kind of linking to do.
425 data GhcLink -- What to do in the link step, if there is one
426 = NoLink -- Don't link at all
427 | LinkBinary -- Link object code into a binary
428 | LinkInMemory -- Use the in-memory dynamic linker
429 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
432 isNoLink :: GhcLink -> Bool
433 isNoLink NoLink = True
434 isNoLink other = False
437 = ExposePackage String
439 | IgnorePackage String
442 defaultHscTarget = defaultObjectTarget
444 -- | the 'HscTarget' value corresponding to the default way to create
445 -- object files on the current platform.
447 | cGhcWithNativeCodeGen == "YES" = HscAsm
450 initDynFlags dflags = do
451 -- someday these will be dynamic flags
452 ways <- readIORef v_Ways
453 build_tag <- readIORef v_Build_tag
454 rts_build_tag <- readIORef v_RTS_Build_tag
457 buildTag = build_tag,
458 rtsBuildTag = rts_build_tag
463 ghcMode = CompManager,
464 ghcLink = LinkBinary,
467 hscTarget = defaultHscTarget,
472 maxSimplIterations = 4,
476 cmdlineHcIncludes = [],
480 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
482 thisPackage = mainPackageId,
488 objectSuf = phaseInputExt StopLn,
489 hcSuf = phaseInputExt HCc,
492 outputFile = Nothing,
494 dumpPrefix = Nothing,
495 dumpPrefixForce = Nothing,
499 cmdlineFrameworks = [],
500 tmpDir = cDEFAULT_TMPDIR,
518 pkgDatabase = Nothing,
519 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
521 Opt_ReadUserPackageConf,
523 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
524 -- behaviour the default, to see if anyone notices
528 Opt_MonomorphismRestriction,
536 Opt_PrintBindResult ]
537 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
538 -- The default -O0 options
541 log_action = \severity srcSpan style msg ->
543 SevInfo -> hPutStrLn stderr (show (msg style))
544 SevFatal -> hPutStrLn stderr (show (msg style))
545 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
551 0 | print errors & warnings only
552 1 | minimal verbosity: print "compiling M ... done." for each module.
553 2 | equivalent to -dshow-passes
554 3 | equivalent to existing "ghc -v"
555 4 | "ghc -v -ddump-most"
556 5 | "ghc -v -ddump-all"
559 dopt :: DynFlag -> DynFlags -> Bool
560 dopt f dflags = f `elem` (flags dflags)
562 dopt_set :: DynFlags -> DynFlag -> DynFlags
563 dopt_set dfs f = dfs{ flags = f : flags dfs }
565 dopt_unset :: DynFlags -> DynFlag -> DynFlags
566 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
568 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
569 getOpts dflags opts = reverse (opts dflags)
570 -- We add to the options from the front, so we need to reverse the list
572 getVerbFlag :: DynFlags -> String
574 | verbosity dflags >= 3 = "-v"
577 setObjectDir f d = d{ objectDir = Just f}
578 setHiDir f d = d{ hiDir = Just f}
579 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
580 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
581 -- #included from the .hc file when compiling with -fvia-C.
583 setObjectSuf f d = d{ objectSuf = f}
584 setHiSuf f d = d{ hiSuf = f}
585 setHcSuf f d = d{ hcSuf = f}
587 setOutputFile f d = d{ outputFile = f}
588 setOutputHi f d = d{ outputHi = f}
590 setDumpPrefixForce f d = d { dumpPrefixForce = f}
592 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
593 -- Config.hs should really use Option.
594 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
596 setPgmL f d = d{ pgm_L = f}
597 setPgmF f d = d{ pgm_F = f}
598 setPgmc f d = d{ pgm_c = (f,[])}
599 setPgmm f d = d{ pgm_m = (f,[])}
600 setPgms f d = d{ pgm_s = (f,[])}
601 setPgma f d = d{ pgm_a = (f,[])}
602 setPgml f d = d{ pgm_l = (f,[])}
603 setPgmdll f d = d{ pgm_dll = (f,[])}
604 setPgmwindres f d = d{ pgm_windres = f}
606 addOptL f d = d{ opt_L = f : opt_L d}
607 addOptP f d = d{ opt_P = f : opt_P d}
608 addOptF f d = d{ opt_F = f : opt_F d}
609 addOptc f d = d{ opt_c = f : opt_c d}
610 addOptm f d = d{ opt_m = f : opt_m d}
611 addOpta f d = d{ opt_a = f : opt_a d}
612 addOptl f d = d{ opt_l = f : opt_l d}
613 addOptdep f d = d{ opt_dep = f : opt_dep d}
614 addOptwindres f d = d{ opt_windres = f : opt_windres d}
616 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
618 -- -----------------------------------------------------------------------------
619 -- Command-line options
621 -- When invoking external tools as part of the compilation pipeline, we
622 -- pass these a sequence of options on the command-line. Rather than
623 -- just using a list of Strings, we use a type that allows us to distinguish
624 -- between filepaths and 'other stuff'. [The reason being, of course, that
625 -- this type gives us a handle on transforming filenames, and filenames only,
626 -- to whatever format they're expected to be on a particular platform.]
629 = FileOption -- an entry that _contains_ filename(s) / filepaths.
630 String -- a non-filepath prefix that shouldn't be
631 -- transformed (e.g., "/out=")
632 String -- the filepath/filename portion
635 -----------------------------------------------------------------------------
636 -- Setting the optimisation level
638 updOptLevel :: Int -> DynFlags -> DynFlags
639 -- Set dynflags appropriate to the optimisation level
641 = dfs2{ optLevel = final_n }
643 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
644 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
645 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
647 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
648 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
650 optLevelFlags :: [([Int], DynFlag)]
652 = [ ([0], Opt_IgnoreInterfacePragmas)
653 , ([0], Opt_OmitInterfacePragmas)
655 , ([1,2], Opt_IgnoreAsserts)
656 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
658 , ([1,2], Opt_DoEtaReduction)
659 , ([1,2], Opt_CaseMerge)
660 , ([1,2], Opt_Strictness)
662 , ([1,2], Opt_FullLaziness)
664 , ([2], Opt_LiberateCase)
665 , ([2], Opt_SpecConstr)
667 , ([0,1,2], Opt_DoLambdaEtaExpansion)
668 -- This one is important for a tiresome reason:
669 -- we want to make sure that the bindings for data
670 -- constructors are eta-expanded. This is probably
671 -- a good thing anyway, but it seems fragile.
674 -- -----------------------------------------------------------------------------
675 -- Standard sets of warning options
678 = [ Opt_WarnDeprecations,
679 Opt_WarnOverlappingPatterns,
680 Opt_WarnMissingFields,
681 Opt_WarnMissingMethods,
682 Opt_WarnDuplicateExports
686 = standardWarnings ++
687 [ Opt_WarnUnusedBinds,
688 Opt_WarnUnusedMatches,
689 Opt_WarnUnusedImports,
690 Opt_WarnIncompletePatterns,
696 [ Opt_WarnTypeDefaults,
697 Opt_WarnNameShadowing,
703 -- minuswRemovesOpts should be every warning option
706 [Opt_WarnImplicitPrelude,
707 Opt_WarnIncompletePatternsRecUpd,
708 Opt_WarnSimplePatterns,
709 Opt_WarnMonomorphism,
713 -- -----------------------------------------------------------------------------
714 -- CoreToDo: abstraction of core-to-core passes to run.
716 data CoreToDo -- These are diff core-to-core passes,
717 -- which may be invoked in any order,
718 -- as many times as you like.
720 = CoreDoSimplify -- The core-to-core simplifier.
723 -- Each run of the simplifier can take a different
724 -- set of simplifier-specific flags.
726 | CoreDoFloatOutwards FloatOutSwitches
731 | CoreDoWorkerWrapper
734 | CoreDoOldStrictness
737 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
738 -- matching this string
739 | CoreDoVectorisation
740 | CoreDoNothing -- Useful when building up
741 | CoreDoPasses [CoreToDo] -- lists of these things
743 data SimplifierMode -- See comments in SimplMonad
747 data SimplifierSwitch
748 = MaxSimplifierIterations Int
751 data FloatOutSwitches
752 = FloatOutSw Bool -- True <=> float lambdas to top level
753 Bool -- True <=> float constants to top level,
754 -- even if they do not escape a lambda
757 -- The core-to-core pass ordering is derived from the DynFlags:
758 runWhen :: Bool -> CoreToDo -> CoreToDo
759 runWhen True do_this = do_this
760 runWhen False do_this = CoreDoNothing
762 getCoreToDo :: DynFlags -> [CoreToDo]
764 | Just todo <- coreToDo dflags = todo -- set explicitly by user
765 | otherwise = core_todo
767 opt_level = optLevel dflags
768 max_iter = maxSimplIterations dflags
769 strictness = dopt Opt_Strictness dflags
770 full_laziness = dopt Opt_FullLaziness dflags
771 cse = dopt Opt_CSE dflags
772 spec_constr = dopt Opt_SpecConstr dflags
773 liberate_case = dopt Opt_LiberateCase dflags
774 rule_check = ruleCheck dflags
775 vectorisation = dopt Opt_Vectorise dflags
778 if opt_level == 0 then
780 CoreDoSimplify (SimplPhase 0) [
781 MaxSimplifierIterations max_iter
784 else {- opt_level >= 1 -} [
786 -- initial simplify: mk specialiser happy: minimum effort please
787 CoreDoSimplify SimplGently [
789 -- Don't inline anything till full laziness has bitten
790 -- In particular, inlining wrappers inhibits floating
791 -- e.g. ...(case f x of ...)...
792 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
793 -- ==> ...(case x of I# x# -> case fw x# of ...)...
794 -- and now the redex (f x) isn't floatable any more
795 -- Similarly, don't apply any rules until after full
796 -- laziness. Notably, list fusion can prevent floating.
798 NoCaseOfCase, -- Don't do case-of-case transformations.
799 -- This makes full laziness work better
800 MaxSimplifierIterations max_iter
804 -- We run vectorisation here for now, but we might also try to run
806 runWhen vectorisation (CoreDoPasses [
808 CoreDoSimplify SimplGently
810 MaxSimplifierIterations max_iter]]),
812 -- Specialisation is best done before full laziness
813 -- so that overloaded functions have all their dictionary lambdas manifest
816 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
820 CoreDoSimplify (SimplPhase 2) [
821 -- Want to run with inline phase 2 after the specialiser to give
822 -- maximum chance for fusion to work before we inline build/augment
823 -- in phase 1. This made a difference in 'ansi' where an
824 -- overloaded function wasn't inlined till too late.
825 MaxSimplifierIterations max_iter
827 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
829 CoreDoSimplify (SimplPhase 1) [
830 -- Need inline-phase2 here so that build/augment get
831 -- inlined. I found that spectral/hartel/genfft lost some useful
832 -- strictness in the function sumcode' if augment is not inlined
833 -- before strictness analysis runs
834 MaxSimplifierIterations max_iter
836 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
838 CoreDoSimplify (SimplPhase 0) [
839 -- Phase 0: allow all Ids to be inlined now
840 -- This gets foldr inlined before strictness analysis
842 MaxSimplifierIterations 3
843 -- At least 3 iterations because otherwise we land up with
844 -- huge dead expressions because of an infelicity in the
846 -- let k = BIG in foldr k z xs
847 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
848 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
852 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
854 #ifdef OLD_STRICTNESS
857 runWhen strictness (CoreDoPasses [
861 CoreDoSimplify (SimplPhase 0) [
862 MaxSimplifierIterations max_iter
865 runWhen full_laziness
866 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
867 True)), -- Float constants
868 -- nofib/spectral/hartel/wang doubles in speed if you
869 -- do full laziness late in the day. It only happens
870 -- after fusion and other stuff, so the early pass doesn't
871 -- catch it. For the record, the redex is
872 -- f_el22 (f_el21 r_midblock)
876 -- We want CSE to follow the final full-laziness pass, because it may
877 -- succeed in commoning up things floated out by full laziness.
878 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
882 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
884 -- Case-liberation for -O2. This should be after
885 -- strictness analysis and the simplification which follows it.
886 runWhen liberate_case (CoreDoPasses [
888 CoreDoSimplify (SimplPhase 0) [
889 MaxSimplifierIterations max_iter
890 ] ]), -- Run the simplifier after LiberateCase to vastly
891 -- reduce the possiblility of shadowing
892 -- Reason: see Note [Shadowing] in SpecConstr.lhs
894 runWhen spec_constr CoreDoSpecConstr,
896 -- Final clean-up simplification:
897 CoreDoSimplify (SimplPhase 0) [
898 MaxSimplifierIterations max_iter
902 -- -----------------------------------------------------------------------------
903 -- StgToDo: abstraction of stg-to-stg passes to run.
906 = StgDoMassageForProfiling -- should be (next to) last
907 -- There's also setStgVarInfo, but its absolute "lastness"
908 -- is so critical that it is hardwired in (no flag).
911 getStgToDo :: DynFlags -> [StgToDo]
913 | Just todo <- stgToDo dflags = todo -- set explicitly by user
916 stg_stats = dopt Opt_StgStats dflags
918 todo1 = if stg_stats then [D_stg_stats] else []
920 todo2 | WayProf `elem` wayNames dflags
921 = StgDoMassageForProfiling : todo1
925 -- -----------------------------------------------------------------------------
929 allFlags = map ('-':) $
930 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
931 map ("fno-"++) flags ++
933 where ok (PrefixPred _ _) = False
935 flags = map fst fFlags
937 dynamic_flags :: [(String, OptKind DynP)]
939 ( "n" , NoArg (setDynFlag Opt_DryRun) )
940 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
941 , ( "F" , NoArg (setDynFlag Opt_Pp))
942 , ( "#include" , HasArg (addCmdlineHCInclude) )
943 , ( "v" , OptIntSuffix setVerbosity )
945 ------- Specific phases --------------------------------------------
946 , ( "pgmL" , HasArg (upd . setPgmL) )
947 , ( "pgmP" , HasArg (upd . setPgmP) )
948 , ( "pgmF" , HasArg (upd . setPgmF) )
949 , ( "pgmc" , HasArg (upd . setPgmc) )
950 , ( "pgmm" , HasArg (upd . setPgmm) )
951 , ( "pgms" , HasArg (upd . setPgms) )
952 , ( "pgma" , HasArg (upd . setPgma) )
953 , ( "pgml" , HasArg (upd . setPgml) )
954 , ( "pgmdll" , HasArg (upd . setPgmdll) )
955 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
957 , ( "optL" , HasArg (upd . addOptL) )
958 , ( "optP" , HasArg (upd . addOptP) )
959 , ( "optF" , HasArg (upd . addOptF) )
960 , ( "optc" , HasArg (upd . addOptc) )
961 , ( "optm" , HasArg (upd . addOptm) )
962 , ( "opta" , HasArg (upd . addOpta) )
963 , ( "optl" , HasArg (upd . addOptl) )
964 , ( "optdep" , HasArg (upd . addOptdep) )
965 , ( "optwindres" , HasArg (upd . addOptwindres) )
967 , ( "split-objs" , NoArg (if can_split
968 then setDynFlag Opt_SplitObjs
971 -------- Linking ----------------------------------------------------
972 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
973 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
974 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
976 ------- Libraries ---------------------------------------------------
977 , ( "L" , Prefix addLibraryPath )
978 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
980 ------- Frameworks --------------------------------------------------
981 -- -framework-path should really be -F ...
982 , ( "framework-path" , HasArg addFrameworkPath )
983 , ( "framework" , HasArg (upd . addCmdlineFramework) )
985 ------- Output Redirection ------------------------------------------
986 , ( "odir" , HasArg (upd . setObjectDir))
987 , ( "o" , SepArg (upd . setOutputFile . Just))
988 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
989 , ( "osuf" , HasArg (upd . setObjectSuf))
990 , ( "hcsuf" , HasArg (upd . setHcSuf))
991 , ( "hisuf" , HasArg (upd . setHiSuf))
992 , ( "hidir" , HasArg (upd . setHiDir))
993 , ( "tmpdir" , HasArg (upd . setTmpDir))
994 , ( "stubdir" , HasArg (upd . setStubDir))
995 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
997 ------- Keeping temporary files -------------------------------------
998 -- These can be singular (think ghc -c) or plural (think ghc --make)
999 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1000 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1001 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1002 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1003 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1004 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1005 -- This only makes sense as plural
1006 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1008 ------- Miscellaneous ----------------------------------------------
1009 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1010 , ( "main-is" , SepArg setMainIs )
1011 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1012 , ( "hpcdir" , SepArg setOptHpcDir )
1014 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1015 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1016 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1018 ------- Packages ----------------------------------------------------
1019 , ( "package-conf" , HasArg extraPkgConf_ )
1020 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1021 , ( "package-name" , HasArg (upd . setPackageName) )
1022 , ( "package" , HasArg exposePackage )
1023 , ( "hide-package" , HasArg hidePackage )
1024 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1025 , ( "ignore-package" , HasArg ignorePackage )
1026 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1028 ------ HsCpp opts ---------------------------------------------------
1029 , ( "D", AnySuffix (upd . addOptP) )
1030 , ( "U", AnySuffix (upd . addOptP) )
1032 ------- Include/Import Paths ----------------------------------------
1033 , ( "I" , Prefix addIncludePath)
1034 , ( "i" , OptPrefix addImportPath )
1036 ------ Debugging ----------------------------------------------------
1037 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1039 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1040 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1041 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1042 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1043 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1044 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1045 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1046 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1047 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1048 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1049 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1050 , ( "ddump-asm-regalloc-stages",
1051 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1052 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1053 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1054 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1055 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1056 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1057 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1058 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1059 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1060 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1061 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1062 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1063 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1064 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1065 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1066 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1067 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1068 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1069 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1070 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1071 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1072 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1073 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1074 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1075 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1076 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1077 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1078 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1079 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1080 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1081 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1082 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1083 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1084 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1085 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1086 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1087 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1088 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1089 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1090 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1091 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1092 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1093 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1094 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1095 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1096 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1097 setVerbosity (Just 2)) )
1098 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1100 ------ Machine dependant (-m<blah>) stuff ---------------------------
1102 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1103 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1104 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1106 ------ Warning opts -------------------------------------------------
1107 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1108 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1109 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1110 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1111 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1112 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1114 ------ Optimisation flags ------------------------------------------
1115 , ( "O" , NoArg (upd (setOptLevel 1)))
1116 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1117 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1118 -- If the number is missing, use 1
1120 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1121 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1123 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1124 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1125 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1127 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1128 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1130 ------ Compiler flags -----------------------------------------------
1132 , ( "fasm", NoArg (setObjTarget HscAsm) )
1133 , ( "fvia-c", NoArg (setObjTarget HscC) )
1134 , ( "fvia-C", NoArg (setObjTarget HscC) )
1136 , ( "fno-code", NoArg (setTarget HscNothing))
1137 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1138 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1140 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1141 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1143 -- the rest of the -f* and -fno-* flags
1144 , ( "f", PrefixPred (isFlag fFlags)
1145 (\f -> setDynFlag (getFlag fFlags f)) )
1146 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1147 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1149 -- the -X* and -XNo* flags
1150 , ( "X", PrefixPred (isFlag xFlags)
1151 (\f -> setDynFlag (getFlag xFlags f)) )
1152 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1153 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1156 -- these -f<blah> flags can all be reversed with -fno-<blah>
1159 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1160 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1161 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1162 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1163 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1164 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1165 ( "warn-missing-fields", Opt_WarnMissingFields ),
1166 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1167 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1168 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1169 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1170 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1171 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1172 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1173 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1174 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1175 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1176 ( "warn-deprecations", Opt_WarnDeprecations ),
1177 ( "warn-orphans", Opt_WarnOrphans ),
1178 ( "warn-tabs", Opt_WarnTabs ),
1179 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1180 ( "strictness", Opt_Strictness ),
1181 ( "full-laziness", Opt_FullLaziness ),
1182 ( "liberate-case", Opt_LiberateCase ),
1183 ( "spec-constr", Opt_SpecConstr ),
1185 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1186 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1187 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1188 ( "ignore-asserts", Opt_IgnoreAsserts ),
1189 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1190 ( "do-eta-reduction", Opt_DoEtaReduction ),
1191 ( "case-merge", Opt_CaseMerge ),
1192 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1193 ( "dicts-cheap", Opt_DictsCheap ),
1194 ( "excess-precision", Opt_ExcessPrecision ),
1195 ( "asm-mangling", Opt_DoAsmMangling ),
1196 ( "print-bind-result", Opt_PrintBindResult ),
1197 ( "force-recomp", Opt_ForceRecomp ),
1198 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1199 ( "rewrite-rules", Opt_RewriteRules ),
1200 ( "break-on-exception", Opt_BreakOnException ),
1201 ( "break-on-error", Opt_BreakOnError ),
1202 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1203 ( "run-cps", Opt_RunCPSZ ),
1204 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1205 ( "vectorise", Opt_Vectorise ),
1206 ( "regs-graph", Opt_RegsGraph),
1207 ( "regs-iterative", Opt_RegsIterative),
1208 -- Deprecated in favour of -XTemplateHaskell:
1209 ( "th", Opt_TemplateHaskell ),
1210 -- Deprecated in favour of -XForeignFunctionInterface:
1211 ( "fi", Opt_ForeignFunctionInterface ),
1212 -- Deprecated in favour of -XForeignFunctionInterface:
1213 ( "ffi", Opt_ForeignFunctionInterface ),
1214 -- Deprecated in favour of -XArrows:
1215 ( "arrows", Opt_Arrows ),
1216 -- Deprecated in favour of -XGenerics:
1217 ( "generics", Opt_Generics ),
1218 -- Deprecated in favour of -XImplicitPrelude:
1219 ( "implicit-prelude", Opt_ImplicitPrelude ),
1220 -- Deprecated in favour of -XBangPatterns:
1221 ( "bang-patterns", Opt_BangPatterns ),
1222 -- Deprecated in favour of -XMonomorphismRestriction:
1223 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1224 -- Deprecated in favour of -XMonoPatBinds:
1225 ( "mono-pat-binds", Opt_MonoPatBinds ),
1226 -- Deprecated in favour of -XExtendedDefaultRules:
1227 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1228 -- Deprecated in favour of -XImplicitParams:
1229 ( "implicit-params", Opt_ImplicitParams ),
1230 -- Deprecated in favour of -XScopedTypeVariables:
1231 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1232 -- Deprecated in favour of -XPArr:
1233 ( "parr", Opt_PArr ),
1234 -- Deprecated in favour of -XOverlappingInstances:
1235 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1236 -- Deprecated in favour of -XUndecidableInstances:
1237 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1238 -- Deprecated in favour of -XIncoherentInstances:
1239 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1240 ( "gen-manifest", Opt_GenManifest ),
1241 ( "embed-manifest", Opt_EmbedManifest )
1244 supportedLanguages :: [String]
1245 supportedLanguages = map fst xFlags
1247 -- These -X<blah> flags can all be reversed with -XNo<blah>
1248 xFlags :: [(String, DynFlag)]
1251 ( "PatternGuards", Opt_PatternGuards ),
1252 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1253 ( "MagicHash", Opt_MagicHash ),
1254 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1255 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1256 ( "KindSignatures", Opt_KindSignatures ),
1257 ( "PatternSignatures", Opt_PatternSignatures ),
1258 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1259 ( "ParallelListComp", Opt_ParallelListComp ),
1260 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1261 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1262 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1263 ( "Rank2Types", Opt_Rank2Types ),
1264 ( "RankNTypes", Opt_RankNTypes ),
1265 ( "TypeOperators", Opt_TypeOperators ),
1266 ( "RecursiveDo", Opt_RecursiveDo ),
1267 ( "Arrows", Opt_Arrows ),
1268 ( "PArr", Opt_PArr ),
1269 ( "TemplateHaskell", Opt_TemplateHaskell ),
1270 ( "Generics", Opt_Generics ),
1272 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1273 ( "RecordWildCards", Opt_RecordWildCards ),
1274 ( "RecordPuns", Opt_RecordPuns ),
1275 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1276 ( "OverloadedStrings", Opt_OverloadedStrings ),
1277 ( "GADTs", Opt_GADTs ),
1278 ( "TypeFamilies", Opt_TypeFamilies ),
1279 ( "BangPatterns", Opt_BangPatterns ),
1281 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1282 -- On by default (which is not strictly H98):
1283 ( "MonoPatBinds", Opt_MonoPatBinds ),
1284 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1285 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1286 ( "ImplicitParams", Opt_ImplicitParams ),
1287 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1288 ( "UnboxedTuples", Opt_UnboxedTuples ),
1289 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1290 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1291 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1292 ( "FlexibleContexts", Opt_FlexibleContexts ),
1293 ( "FlexibleInstances", Opt_FlexibleInstances ),
1294 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1295 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1296 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1297 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1298 ( "OverlappingInstances", Opt_OverlappingInstances ),
1299 ( "UndecidableInstances", Opt_UndecidableInstances ),
1300 ( "IncoherentInstances", Opt_IncoherentInstances )
1303 impliedFlags :: [(DynFlag, [DynFlag])]
1305 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1308 glasgowExtsFlags = [
1309 Opt_PrintExplicitForalls
1310 , Opt_ForeignFunctionInterface
1311 , Opt_UnliftedFFITypes
1313 , Opt_ImplicitParams
1314 , Opt_ScopedTypeVariables
1316 , Opt_TypeSynonymInstances
1317 , Opt_StandaloneDeriving
1318 , Opt_DeriveDataTypeable
1319 , Opt_FlexibleContexts
1320 , Opt_FlexibleInstances
1321 , Opt_ConstrainedClassMethods
1322 , Opt_MultiParamTypeClasses
1323 , Opt_FunctionalDependencies
1325 , Opt_PolymorphicComponents
1326 , Opt_ExistentialQuantification
1329 , Opt_LiberalTypeSynonyms
1333 , Opt_ParallelListComp
1334 , Opt_EmptyDataDecls
1335 , Opt_KindSignatures
1336 , Opt_PatternSignatures
1337 , Opt_GeneralizedNewtypeDeriving
1338 , Opt_TypeFamilies ]
1341 isFlag :: [(String,a)] -> String -> Bool
1342 isFlag flags f = any (\(ff,_) -> ff == f) flags
1344 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1345 isPrefFlag pref flags no_f
1346 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1350 getFlag :: [(String,a)] -> String -> a
1351 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1353 [] -> panic ("get_flag " ++ f)
1355 getPrefFlag :: String -> [(String,a)] -> String -> a
1356 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1357 -- We should only be passed flags which match the prefix
1359 -- -----------------------------------------------------------------------------
1360 -- Parsing the dynamic flags.
1362 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1363 parseDynamicFlags dflags args = do
1364 let ((leftover,errs),dflags')
1365 = runCmdLine (processArgs dynamic_flags args) dflags
1366 when (not (null errs)) $ do
1367 throwDyn (UsageError (unlines errs))
1368 return (dflags', leftover)
1371 type DynP = CmdLineP DynFlags
1373 upd :: (DynFlags -> DynFlags) -> DynP ()
1375 dfs <- getCmdLineState
1376 putCmdLineState $! (f dfs)
1378 --------------------------
1379 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1380 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1382 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1383 -- When you set f, set the ones it implies
1384 -- When you un-set f, however, we don't un-set the things it implies
1385 -- (except for -fno-glasgow-exts, which is treated specially)
1387 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1389 --------------------------
1390 setDumpFlag :: DynFlag -> OptKind DynP
1391 setDumpFlag dump_flag
1392 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1393 -- Whenver we -ddump, switch off the recompilation checker,
1394 -- else you don't see the dump!
1396 setVerbosity :: Maybe Int -> DynP ()
1397 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1399 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1401 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1404 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1406 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1408 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1411 | Nothing <- unpackPackageId pid
1412 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1414 = \s -> s{ thisPackage = pid }
1416 pid = stringToPackageId p
1418 -- If we're linking a binary, then only targets that produce object
1419 -- code are allowed (requests for other target types are ignored).
1420 setTarget l = upd set
1423 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1426 -- Changes the target only if we're compiling object code. This is
1427 -- used by -fasm and -fvia-C, which switch from one to the other, but
1428 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1429 -- can be safely used in an OPTIONS_GHC pragma.
1430 setObjTarget l = upd set
1433 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1436 setOptLevel :: Int -> DynFlags -> DynFlags
1437 setOptLevel n dflags
1438 | hscTarget dflags == HscInterpreted && n > 0
1440 -- not in IO any more, oh well:
1441 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1443 = updOptLevel n dflags
1446 setMainIs :: String -> DynP ()
1448 | not (null main_fn) -- The arg looked like "Foo.baz"
1449 = upd $ \d -> d{ mainFunIs = Just main_fn,
1450 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1452 | isUpper (head main_mod) -- The arg looked like "Foo"
1453 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1455 | otherwise -- The arg looked like "baz"
1456 = upd $ \d -> d{ mainFunIs = Just main_mod }
1458 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1460 -----------------------------------------------------------------------------
1461 -- Paths & Libraries
1463 -- -i on its own deletes the import paths
1464 addImportPath "" = upd (\s -> s{importPaths = []})
1465 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1469 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1472 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1474 addFrameworkPath p =
1475 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1477 split_marker = ':' -- not configurable (ToDo)
1479 splitPathList :: String -> [String]
1480 splitPathList s = filter notNull (splitUp s)
1481 -- empty paths are ignored: there might be a trailing
1482 -- ':' in the initial list, for example. Empty paths can
1483 -- cause confusion when they are translated into -I options
1484 -- for passing to gcc.
1486 #ifndef mingw32_TARGET_OS
1487 splitUp xs = split split_marker xs
1489 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1491 -- That is, if "foo:bar:baz" is used, this interpreted as
1492 -- consisting of three entries, 'foo', 'bar', 'baz'.
1493 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1494 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1496 -- Notice that no attempt is made to fully replace the 'standard'
1497 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1498 -- that this will cause too much breakage for users & ':' will
1499 -- work fine even with DOS paths, if you're not insisting on being silly.
1502 splitUp (x:':':div:xs) | div `elem` dir_markers
1503 = ((x:':':div:p): splitUp rs)
1505 (p,rs) = findNextPath xs
1506 -- we used to check for existence of the path here, but that
1507 -- required the IO monad to be threaded through the command-line
1508 -- parser which is quite inconvenient. The
1509 splitUp xs = cons p (splitUp rs)
1511 (p,rs) = findNextPath xs
1516 -- will be called either when we've consumed nought or the
1517 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1518 -- finding the next split marker.
1520 case break (`elem` split_markers) xs of
1521 (p, d:ds) -> (p, ds)
1524 split_markers :: [Char]
1525 split_markers = [':', ';']
1527 dir_markers :: [Char]
1528 dir_markers = ['/', '\\']
1531 -- -----------------------------------------------------------------------------
1532 -- tmpDir, where we store temporary files.
1534 setTmpDir :: FilePath -> DynFlags -> DynFlags
1535 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1537 #if !defined(mingw32_HOST_OS)
1538 canonicalise p = normalisePath p
1540 -- Canonicalisation of temp path under win32 is a bit more
1541 -- involved: (a) strip trailing slash,
1542 -- (b) normalise slashes
1543 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1545 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1547 -- if we're operating under cygwin, and TMP/TEMP is of
1548 -- the form "/cygdrive/drive/path", translate this to
1549 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1550 -- understand /cygdrive paths.)
1552 | "/cygdrive/" `isPrefixOf` path =
1553 case drop (length "/cygdrive/") path of
1554 drive:xs@('/':_) -> drive:':':xs
1558 -- strip the trailing backslash (awful, but we only do this once).
1559 removeTrailingSlash path =
1566 -----------------------------------------------------------------------------
1569 setOptHpcDir :: String -> DynP ()
1570 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1572 -----------------------------------------------------------------------------
1573 -- Via-C compilation stuff
1575 -- There are some options that we need to pass to gcc when compiling
1576 -- Haskell code via C, but are only supported by recent versions of
1577 -- gcc. The configure script decides which of these options we need,
1578 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1579 -- read before each via-C compilation. The advantage of having these
1580 -- in a separate file is that the file can be created at install-time
1581 -- depending on the available gcc version, and even re-generated later
1582 -- if gcc is upgraded.
1584 -- The options below are not dependent on the version of gcc, only the
1587 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1588 [String]) -- for registerised HC compilations
1589 machdepCCOpts dflags
1590 #if alpha_TARGET_ARCH
1592 #ifdef HAVE_THREADED_RTS_SUPPORT
1596 -- For now, to suppress the gcc warning "call-clobbered
1597 -- register used for global register variable", we simply
1598 -- disable all warnings altogether using the -w flag. Oh well.
1600 #elif hppa_TARGET_ARCH
1601 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1602 -- (very nice, but too bad the HP /usr/include files don't agree.)
1603 = ( ["-D_HPUX_SOURCE"], [] )
1605 #elif m68k_TARGET_ARCH
1606 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1607 -- popping of args to routines to be explicit; if we let things
1608 -- be deferred 'til after an STGJUMP, imminent death is certain!
1610 -- -fomit-frame-pointer : *don't*
1611 -- It's better to have a6 completely tied up being a frame pointer
1612 -- rather than let GCC pick random things to do with it.
1613 -- (If we want to steal a6, then we would try to do things
1614 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1615 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1617 #elif i386_TARGET_ARCH
1618 -- -fno-defer-pop : basically the same game as for m68k
1620 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1621 -- the fp (%ebp) for our register maps.
1622 = let n_regs = stolen_x86_regs dflags
1625 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1626 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1629 "-fomit-frame-pointer",
1630 -- we want -fno-builtin, because when gcc inlines
1631 -- built-in functions like memcpy() it tends to
1632 -- run out of registers, requiring -monly-n-regs
1634 "-DSTOLEN_X86_REGS="++show n_regs ]
1637 #elif ia64_TARGET_ARCH
1638 = ( [], ["-fomit-frame-pointer", "-G0"] )
1640 #elif x86_64_TARGET_ARCH
1641 = ( [], ["-fomit-frame-pointer",
1642 "-fno-asynchronous-unwind-tables",
1643 -- the unwind tables are unnecessary for HC code,
1644 -- and get in the way of -split-objs. Another option
1645 -- would be to throw them away in the mangler, but this
1648 -- calling builtins like strlen() using the FFI can
1649 -- cause gcc to run out of regs, so use the external
1653 #elif sparc_TARGET_ARCH
1655 -- For now, to suppress the gcc warning "call-clobbered
1656 -- register used for global register variable", we simply
1657 -- disable all warnings altogether using the -w flag. Oh well.
1659 #elif powerpc_apple_darwin_TARGET
1661 -- Disable Apple's precompiling preprocessor. It's a great thing
1662 -- for "normal" programs, but it doesn't support register variable
1664 = ( [], ["-no-cpp-precomp"] )
1669 picCCOpts :: DynFlags -> [String]
1671 #if darwin_TARGET_OS
1672 -- Apple prefers to do things the other way round.
1673 -- PIC is on by default.
1674 -- -mdynamic-no-pic:
1675 -- Turn off PIC code generation.
1677 -- Don't generate "common" symbols - these are unwanted
1678 -- in dynamic libraries.
1681 = ["-fno-common", "-D__PIC__"]
1683 = ["-mdynamic-no-pic"]
1684 #elif mingw32_TARGET_OS
1685 -- no -fPIC for Windows
1692 = ["-fPIC", "-D__PIC__"]
1697 -- -----------------------------------------------------------------------------
1701 can_split = cSplitObjs == "YES"
1703 -- -----------------------------------------------------------------------------
1706 compilerInfo :: [(String, String)]
1707 compilerInfo = [("Project name", cProjectName),
1708 ("Project version", cProjectVersion),
1709 ("Booter version", cBooterVersion),
1711 ("Interface file version", cHscIfaceFileVersion),
1712 ("Have interpreter", cGhcWithInterpreter),
1713 ("Object splitting", cSplitObjs),
1714 ("Have native code generator", cGhcWithNativeCodeGen),
1715 ("Support SMP", cGhcWithSMP),
1716 ("Unregisterised", cGhcUnregisterised),
1717 ("Tables next to code", cGhcEnableTablesNextToCode),
1718 ("Win32 DLLs", cEnableWin32DLLs),
1719 ("RTS ways", cGhcRTSWays),
1720 ("Leading underscore", cLeadingUnderscore)]