6 -- (c) The University of Glasgow 2005
9 -- Most flags are dynamic flags, which means they can change from
10 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
11 -- multi-session GHC each session can be using different dynamic
12 -- flags. Dynamic flags can also be set at the prompt in GHCi.
14 -- * Dynamic flags and associated configuration types
17 HscTarget(..), isObjectTarget, defaultObjectTarget,
18 GhcMode(..), isOneShot,
19 GhcLink(..), isNoLink,
26 -- ** Manipulating DynFlags
27 defaultDynFlags, -- DynFlags
28 initDynFlags, -- DynFlags -> IO DynFlags
30 dopt, -- DynFlag -> DynFlags -> Bool
31 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
32 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
39 -- ** Parsing DynFlags
41 parseDynamicNoPackageFlags,
44 supportedLanguages, languageOptions,
46 -- ** DynFlag C compiler options
47 machdepCCOpts, picCCOpts,
49 -- * Configuration of the core-to-core passes
56 -- * Configuration of the stg-to-stg passes
60 -- * Compiler configuration suitable for display to the user
64 #include "HsVersions.h"
68 import PrelNames ( mAIN, main_RDR_Unqual )
69 import RdrName ( RdrName, mkRdrUnqual )
70 import OccName ( mkVarOccFS )
71 #ifdef i386_TARGET_ARCH
72 import StaticFlags ( opt_Static )
74 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
76 import {-# SOURCE #-} Packages (PackageState)
77 import DriverPhases ( Phase(..), phaseInputExt )
80 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
82 import UniqFM ( UniqFM )
84 import Maybes ( orElse )
88 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
90 import Data.IORef ( readIORef )
91 import Control.Monad ( when )
94 import Data.List ( intersperse )
95 import System.FilePath
96 import System.IO ( stderr, hPutChar )
98 -- -----------------------------------------------------------------------------
101 -- | Enumerates the simple on-or-off dynamic flags
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
152 | Opt_D_verbose_core2core
153 | Opt_D_verbose_stg2stg
155 | Opt_D_dump_hi_diffs
156 | Opt_D_dump_minimal_imports
157 | Opt_D_dump_mod_cycles
158 | Opt_D_dump_view_pattern_commoning
159 | Opt_D_faststring_stats
160 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
161 | Opt_D_no_debug_output
167 | Opt_WarnIsError -- -Werror; makes warnings fatal
168 | Opt_WarnDuplicateExports
170 | Opt_WarnImplicitPrelude
171 | Opt_WarnIncompletePatterns
172 | Opt_WarnIncompletePatternsRecUpd
173 | Opt_WarnMissingFields
174 | Opt_WarnMissingMethods
175 | Opt_WarnMissingSigs
176 | Opt_WarnNameShadowing
177 | Opt_WarnOverlappingPatterns
178 | Opt_WarnSimplePatterns
179 | Opt_WarnTypeDefaults
180 | Opt_WarnMonomorphism
181 | Opt_WarnUnusedBinds
182 | Opt_WarnUnusedImports
183 | Opt_WarnUnusedMatches
184 | Opt_WarnWarningsDeprecations
185 | Opt_WarnDeprecatedFlags
186 | Opt_WarnDodgyImports
189 | Opt_WarnUnrecognisedPragmas
190 | Opt_WarnDodgyForeignImports
193 | Opt_OverlappingInstances
194 | Opt_UndecidableInstances
195 | Opt_IncoherentInstances
196 | Opt_MonomorphismRestriction
198 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
199 | Opt_ForeignFunctionInterface
200 | Opt_UnliftedFFITypes
201 | Opt_PArr -- Syntactic support for parallel arrays
202 | Opt_Arrows -- Arrow-notation syntax
203 | Opt_TemplateHaskell
206 | Opt_Generics -- "Derivable type classes"
207 | Opt_ImplicitPrelude
208 | Opt_ScopedTypeVariables
212 | Opt_OverloadedStrings
213 | Opt_DisambiguateRecordFields
214 | Opt_RecordWildCards
219 | Opt_StandaloneDeriving
220 | Opt_DeriveDataTypeable
221 | Opt_TypeSynonymInstances
222 | Opt_FlexibleContexts
223 | Opt_FlexibleInstances
224 | Opt_ConstrainedClassMethods
225 | Opt_MultiParamTypeClasses
226 | Opt_FunctionalDependencies
228 | Opt_PolymorphicComponents
229 | Opt_ExistentialQuantification
233 | Opt_ParallelListComp
234 | Opt_TransformListComp
235 | Opt_GeneralizedNewtypeDeriving
237 | Opt_PostfixOperators
239 | Opt_LiberalTypeSynonyms
242 | Opt_ImpredicativeTypes
245 | Opt_NewQualifiedOperators
247 | Opt_PrintExplicitForalls
252 | Opt_StaticArgumentTransformation
256 | Opt_IgnoreInterfacePragmas
257 | Opt_OmitInterfacePragmas
258 | Opt_DoLambdaEtaExpansion
262 | Opt_UnboxStrictFields
265 | Opt_InlineIfEnoughArgs
266 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
268 | Opt_RegsGraph -- do graph coloring register allocation
269 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
277 | Opt_ExcessPrecision
278 | Opt_ReadUserPackageConf
282 | Opt_HideAllPackages
283 | Opt_PrintBindResult
287 | Opt_BreakOnException
289 | Opt_PrintEvldWithShow
290 | Opt_PrintBindContents
294 | Opt_ConvertToZipCfgAndBack
295 | Opt_AutoLinkPackages
296 | Opt_ImplicitImportQualified
304 | Opt_KeepRawTokenStream
308 -- | Contains not only a collection of 'DynFlag's but also a plethora of
309 -- information relating to the compilation of a single file or GHC session
310 data DynFlags = DynFlags {
313 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
314 stgToDo :: Maybe [StgToDo], -- similarly
315 hscTarget :: HscTarget,
316 hscOutName :: String, -- ^ Name of the output file
317 extCoreName :: String, -- ^ Name of the .hcr output file
318 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
319 optLevel :: Int, -- ^ Optimisation level
320 simplPhases :: Int, -- ^ Number of simplifier phases
321 maxSimplIterations :: Int, -- ^ Max simplifier iterations
322 shouldDumpSimplPhase :: SimplifierMode -> Bool,
323 ruleCheck :: Maybe String,
325 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
326 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
327 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
329 stolen_x86_regs :: Int,
330 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
331 importPaths :: [FilePath],
333 mainFunIs :: Maybe String,
334 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
336 dphBackend :: DPHBackend,
338 thisPackage :: PackageId, -- ^ name of package currently being compiled
341 wayNames :: [WayName], -- ^ Way flags from the command line
342 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
343 rtsBuildTag :: String, -- ^ The RTS \"way\"
346 objectDir :: Maybe String,
347 hiDir :: Maybe String,
348 stubDir :: Maybe String,
354 outputFile :: Maybe String,
355 outputHi :: Maybe String,
356 dynLibLoader :: DynLibLoader,
358 -- | This is set by 'DriverPipeline.runPipeline' based on where
359 -- its output is going.
360 dumpPrefix :: Maybe FilePath,
362 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
363 -- Set by @-ddump-file-prefix@
364 dumpPrefixForce :: Maybe FilePath,
366 includePaths :: [String],
367 libraryPaths :: [String],
368 frameworkPaths :: [String], -- used on darwin only
369 cmdlineFrameworks :: [String], -- ditto
370 tmpDir :: String, -- no trailing '/'
372 ghcUsagePath :: FilePath, -- Filled in by SysTools
373 ghciUsagePath :: FilePath, -- ditto
375 hpcDir :: String, -- ^ Path to store the .mix files
377 -- options for particular phases
385 opt_windres :: [String],
387 -- commands for particular phases
389 pgm_P :: (String,[Option]),
391 pgm_c :: (String,[Option]),
392 pgm_m :: (String,[Option]),
393 pgm_s :: (String,[Option]),
394 pgm_a :: (String,[Option]),
395 pgm_l :: (String,[Option]),
396 pgm_dll :: (String,[Option]),
398 pgm_sysman :: String,
399 pgm_windres :: String,
402 depMakefile :: FilePath,
403 depIncludePkgDeps :: Bool,
404 depExcludeMods :: [ModuleName],
405 depSuffixes :: [String],
409 extraPkgConfs :: [FilePath],
410 topDir :: FilePath, -- filled in by SysTools
411 systemPackageConfig :: FilePath, -- ditto
412 -- ^ The @-package-conf@ flags given on the command line, in the order
415 packageFlags :: [PackageFlag],
416 -- ^ The @-package@ and @-hide-package@ flags from the command-line
419 -- NB. do not modify this field, it is calculated by
420 -- Packages.initPackages and Packages.updatePackages.
421 pkgDatabase :: Maybe (UniqFM PackageConfig),
422 pkgState :: PackageState,
427 -- | Message output action: use "ErrUtils" instead of this if you can
428 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
430 haddockOptions :: Maybe String
441 -- | Will this target result in an object file on the disk?
442 isObjectTarget :: HscTarget -> Bool
443 isObjectTarget HscC = True
444 isObjectTarget HscAsm = True
445 isObjectTarget _ = False
447 -- | The 'GhcMode' tells us whether we're doing multi-module
448 -- compilation (controlled via the "GHC" API) or one-shot
449 -- (single-module) compilation. This makes a difference primarily to
450 -- the "Finder": in one-shot mode we look for interface files for
451 -- imported modules, but in multi-module mode we look for source files
452 -- in order to check whether they need to be recompiled.
454 = CompManager -- ^ @\-\-make@, GHCi, etc.
455 | OneShot -- ^ @ghc -c Foo.hs@
456 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
459 instance Outputable GhcMode where
460 ppr CompManager = ptext (sLit "CompManager")
461 ppr OneShot = ptext (sLit "OneShot")
462 ppr MkDepend = ptext (sLit "MkDepend")
464 isOneShot :: GhcMode -> Bool
465 isOneShot OneShot = True
466 isOneShot _other = False
468 -- | What to do in the link step, if there is one.
470 = NoLink -- ^ Don't link at all
471 | LinkBinary -- ^ Link object code into a binary
472 | LinkInMemory -- ^ Use the in-memory dynamic linker
473 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
476 isNoLink :: GhcLink -> Bool
477 isNoLink NoLink = True
481 = ExposePackage String
483 | IgnorePackage String
486 defaultHscTarget :: HscTarget
487 defaultHscTarget = defaultObjectTarget
489 -- | The 'HscTarget' value corresponding to the default way to create
490 -- object files on the current platform.
491 defaultObjectTarget :: HscTarget
493 | cGhcWithNativeCodeGen == "YES" = HscAsm
498 | Wrapped (Maybe String)
502 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
503 initDynFlags :: DynFlags -> IO DynFlags
504 initDynFlags dflags = do
505 -- someday these will be dynamic flags
506 ways <- readIORef v_Ways
507 build_tag <- readIORef v_Build_tag
508 rts_build_tag <- readIORef v_RTS_Build_tag
511 buildTag = build_tag,
512 rtsBuildTag = rts_build_tag
515 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
516 -- and must be fully initialized by 'GHC.newSession' first.
517 defaultDynFlags :: DynFlags
520 ghcMode = CompManager,
521 ghcLink = LinkBinary,
524 hscTarget = defaultHscTarget,
530 maxSimplIterations = 4,
531 shouldDumpSimplPhase = const False,
533 specConstrThreshold = Just 200,
534 specConstrCount = Just 3,
535 liberateCaseThreshold = Just 200,
537 cmdlineHcIncludes = [],
541 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
545 thisPackage = mainPackageId,
551 objectSuf = phaseInputExt StopLn,
552 hcSuf = phaseInputExt HCc,
555 outputFile = Nothing,
557 dynLibLoader = Deployable,
558 dumpPrefix = Nothing,
559 dumpPrefixForce = Nothing,
563 cmdlineFrameworks = [],
564 tmpDir = cDEFAULT_TMPDIR,
570 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
581 pkgDatabase = Nothing,
582 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
583 wayNames = panic "defaultDynFlags: No wayNames",
584 buildTag = panic "defaultDynFlags: No buildTag",
585 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
586 -- initSysTools fills all these in
587 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
588 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
589 topDir = panic "defaultDynFlags: No topDir",
590 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
591 pgm_L = panic "defaultDynFlags: No pgm_L",
592 pgm_P = panic "defaultDynFlags: No pgm_P",
593 pgm_F = panic "defaultDynFlags: No pgm_F",
594 pgm_c = panic "defaultDynFlags: No pgm_c",
595 pgm_m = panic "defaultDynFlags: No pgm_m",
596 pgm_s = panic "defaultDynFlags: No pgm_s",
597 pgm_a = panic "defaultDynFlags: No pgm_a",
598 pgm_l = panic "defaultDynFlags: No pgm_l",
599 pgm_dll = panic "defaultDynFlags: No pgm_dll",
600 pgm_T = panic "defaultDynFlags: No pgm_T",
601 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
602 pgm_windres = panic "defaultDynFlags: No pgm_windres",
603 -- end of initSysTools values
605 depMakefile = "Makefile",
606 depIncludePkgDeps = False,
610 -- end of ghc -M values
611 haddockOptions = Nothing,
613 Opt_AutoLinkPackages,
614 Opt_ReadUserPackageConf,
616 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
617 -- behaviour the default, to see if anyone notices
621 Opt_MonomorphismRestriction,
629 Opt_PrintBindContents
631 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
632 -- The default -O0 options
635 log_action = \severity srcSpan style msg ->
637 SevInfo -> printErrs (msg style)
638 SevFatal -> printErrs (msg style)
641 printErrs ((mkLocMessage srcSpan msg) style)
642 -- careful (#2302): printErrs prints in UTF-8, whereas
643 -- converting to string first and using hPutStr would
644 -- just emit the low 8 bits of each unicode char.
651 0 | print errors & warnings only
652 1 | minimal verbosity: print "compiling M ... done." for each module.
653 2 | equivalent to -dshow-passes
654 3 | equivalent to existing "ghc -v"
655 4 | "ghc -v -ddump-most"
656 5 | "ghc -v -ddump-all"
659 -- | Test whether a 'DynFlag' is set
660 dopt :: DynFlag -> DynFlags -> Bool
661 dopt f dflags = f `elem` (flags dflags)
664 dopt_set :: DynFlags -> DynFlag -> DynFlags
665 dopt_set dfs f = dfs{ flags = f : flags dfs }
667 -- | Unset a 'DynFlag'
668 dopt_unset :: DynFlags -> DynFlag -> DynFlags
669 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
671 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
672 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
673 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
674 -> [a] -- ^ Correctly ordered extracted options
675 getOpts dflags opts = reverse (opts dflags)
676 -- We add to the options from the front, so we need to reverse the list
678 -- | Gets the verbosity flag for the current verbosity level. This is fed to
679 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
680 getVerbFlag :: DynFlags -> String
682 | verbosity dflags >= 3 = "-v"
685 setObjectDir, setHiDir, setStubDir, setOutputDir,
686 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
687 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
688 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
689 addCmdlineFramework, addHaddockOpts
690 :: String -> DynFlags -> DynFlags
691 setOutputFile, setOutputHi, setDumpPrefixForce
692 :: Maybe String -> DynFlags -> DynFlags
694 setObjectDir f d = d{ objectDir = Just f}
695 setHiDir f d = d{ hiDir = Just f}
696 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
697 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
698 -- \#included from the .hc file when compiling with -fvia-C.
699 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
701 setObjectSuf f d = d{ objectSuf = f}
702 setHiSuf f d = d{ hiSuf = f}
703 setHcSuf f d = d{ hcSuf = f}
705 setOutputFile f d = d{ outputFile = f}
706 setOutputHi f d = d{ outputHi = f}
708 parseDynLibLoaderMode f d =
710 ("deploy", "") -> d{ dynLibLoader = Deployable }
711 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
712 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
713 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
714 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
715 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
717 setDumpPrefixForce f d = d { dumpPrefixForce = f}
719 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
720 -- Config.hs should really use Option.
721 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
723 setPgmL f d = d{ pgm_L = f}
724 setPgmF f d = d{ pgm_F = f}
725 setPgmc f d = d{ pgm_c = (f,[])}
726 setPgmm f d = d{ pgm_m = (f,[])}
727 setPgms f d = d{ pgm_s = (f,[])}
728 setPgma f d = d{ pgm_a = (f,[])}
729 setPgml f d = d{ pgm_l = (f,[])}
730 setPgmdll f d = d{ pgm_dll = (f,[])}
731 setPgmwindres f d = d{ pgm_windres = f}
733 addOptL f d = d{ opt_L = f : opt_L d}
734 addOptP f d = d{ opt_P = f : opt_P d}
735 addOptF f d = d{ opt_F = f : opt_F d}
736 addOptc f d = d{ opt_c = f : opt_c d}
737 addOptm f d = d{ opt_m = f : opt_m d}
738 addOpta f d = d{ opt_a = f : opt_a d}
739 addOptl f d = d{ opt_l = f : opt_l d}
740 addOptwindres f d = d{ opt_windres = f : opt_windres d}
742 setDepMakefile :: FilePath -> DynFlags -> DynFlags
743 setDepMakefile f d = d { depMakefile = deOptDep f }
745 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
746 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
748 addDepExcludeMod :: String -> DynFlags -> DynFlags
750 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
752 addDepSuffix :: FilePath -> DynFlags -> DynFlags
753 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
755 setDepWarnings :: Bool -> DynFlags -> DynFlags
756 setDepWarnings b d = d { depWarnings = b }
759 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
760 -- we need to strip the "-optdep" off of the arg
761 deOptDep :: String -> String
762 deOptDep x = case maybePrefixMatch "-optdep" x of
766 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
768 addHaddockOpts f d = d{ haddockOptions = Just f}
770 -- -----------------------------------------------------------------------------
771 -- Command-line options
773 -- | When invoking external tools as part of the compilation pipeline, we
774 -- pass these a sequence of options on the command-line. Rather than
775 -- just using a list of Strings, we use a type that allows us to distinguish
776 -- between filepaths and 'other stuff'. The reason for this is that
777 -- this type gives us a handle on transforming filenames, and filenames only,
778 -- to whatever format they're expected to be on a particular platform.
780 = FileOption -- an entry that _contains_ filename(s) / filepaths.
781 String -- a non-filepath prefix that shouldn't be
782 -- transformed (e.g., "/out=")
783 String -- the filepath/filename portion
786 -----------------------------------------------------------------------------
787 -- Setting the optimisation level
789 updOptLevel :: Int -> DynFlags -> DynFlags
790 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
792 = dfs2{ optLevel = final_n }
794 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
795 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
796 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
798 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
799 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
801 optLevelFlags :: [([Int], DynFlag)]
803 = [ ([0], Opt_IgnoreInterfacePragmas)
804 , ([0], Opt_OmitInterfacePragmas)
806 , ([1,2], Opt_IgnoreAsserts)
807 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
809 , ([1,2], Opt_DoEtaReduction)
810 , ([1,2], Opt_CaseMerge)
811 , ([1,2], Opt_Strictness)
813 , ([1,2], Opt_FullLaziness)
815 , ([2], Opt_LiberateCase)
816 , ([2], Opt_SpecConstr)
818 -- , ([2], Opt_StaticArgumentTransformation)
819 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
820 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
821 -- several improvements to the heuristics, and I'm concerned that without
822 -- those changes SAT will interfere with some attempts to write "high
823 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
824 -- this year. In particular, the version in HEAD lacks the tail call
825 -- criterion, so many things that look like reasonable loops will be
826 -- turned into functions with extra (unneccesary) thunk creation.
828 , ([0,1,2], Opt_DoLambdaEtaExpansion)
829 -- This one is important for a tiresome reason:
830 -- we want to make sure that the bindings for data
831 -- constructors are eta-expanded. This is probably
832 -- a good thing anyway, but it seems fragile.
835 -- -----------------------------------------------------------------------------
836 -- Standard sets of warning options
838 standardWarnings :: [DynFlag]
840 = [ Opt_WarnWarningsDeprecations,
841 Opt_WarnDeprecatedFlags,
842 Opt_WarnUnrecognisedPragmas,
843 Opt_WarnOverlappingPatterns,
844 Opt_WarnMissingFields,
845 Opt_WarnMissingMethods,
846 Opt_WarnDuplicateExports,
847 Opt_WarnDodgyForeignImports
850 minusWOpts :: [DynFlag]
852 = standardWarnings ++
853 [ Opt_WarnUnusedBinds,
854 Opt_WarnUnusedMatches,
855 Opt_WarnUnusedImports,
856 Opt_WarnIncompletePatterns,
860 minusWallOpts :: [DynFlag]
863 [ Opt_WarnTypeDefaults,
864 Opt_WarnNameShadowing,
870 -- minuswRemovesOpts should be every warning option
871 minuswRemovesOpts :: [DynFlag]
874 [Opt_WarnImplicitPrelude,
875 Opt_WarnIncompletePatternsRecUpd,
876 Opt_WarnSimplePatterns,
877 Opt_WarnMonomorphism,
878 Opt_WarnUnrecognisedPragmas,
882 -- -----------------------------------------------------------------------------
883 -- CoreToDo: abstraction of core-to-core passes to run.
885 data CoreToDo -- These are diff core-to-core passes,
886 -- which may be invoked in any order,
887 -- as many times as you like.
889 = CoreDoSimplify -- The core-to-core simplifier.
892 -- Each run of the simplifier can take a different
893 -- set of simplifier-specific flags.
895 | CoreDoFloatOutwards FloatOutSwitches
900 | CoreDoWorkerWrapper
903 | CoreDoOldStrictness
906 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
907 -- matching this string
908 | CoreDoVectorisation PackageId
909 | CoreDoNothing -- Useful when building up
910 | CoreDoPasses [CoreToDo] -- lists of these things
913 data SimplifierMode -- See comments in SimplMonad
915 | SimplPhase Int [String]
917 instance Outputable SimplifierMode where
918 ppr SimplGently = ptext (sLit "gentle")
919 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
922 data SimplifierSwitch
923 = MaxSimplifierIterations Int
927 data FloatOutSwitches = FloatOutSwitches {
928 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
929 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
930 -- even if they do not escape a lambda
933 instance Outputable FloatOutSwitches where
934 ppr = pprFloatOutSwitches
936 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
937 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
938 <+> pp_not (floatOutConstants sw) <+> text "constants"
941 pp_not False = text "not"
943 -- | Switches that specify the minimum amount of floating out
944 gentleFloatOutSwitches :: FloatOutSwitches
945 gentleFloatOutSwitches = FloatOutSwitches False False
947 -- | Switches that do not specify floating out of lambdas, just of constants
948 constantsOnlyFloatOutSwitches :: FloatOutSwitches
949 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
952 -- The core-to-core pass ordering is derived from the DynFlags:
953 runWhen :: Bool -> CoreToDo -> CoreToDo
954 runWhen True do_this = do_this
955 runWhen False _ = CoreDoNothing
957 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
958 runMaybe (Just x) f = f x
959 runMaybe Nothing _ = CoreDoNothing
961 getCoreToDo :: DynFlags -> [CoreToDo]
963 | Just todo <- coreToDo dflags = todo -- set explicitly by user
964 | otherwise = core_todo
966 opt_level = optLevel dflags
967 phases = simplPhases dflags
968 max_iter = maxSimplIterations dflags
969 strictness = dopt Opt_Strictness dflags
970 full_laziness = dopt Opt_FullLaziness dflags
971 cse = dopt Opt_CSE dflags
972 spec_constr = dopt Opt_SpecConstr dflags
973 liberate_case = dopt Opt_LiberateCase dflags
974 rule_check = ruleCheck dflags
975 static_args = dopt Opt_StaticArgumentTransformation dflags
977 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
979 simpl_phase phase names iter
981 [ CoreDoSimplify (SimplPhase phase names) [
982 MaxSimplifierIterations iter
984 maybe_rule_check phase
988 = runWhen (dopt Opt_Vectorise dflags)
989 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
992 -- By default, we have 2 phases before phase 0.
994 -- Want to run with inline phase 2 after the specialiser to give
995 -- maximum chance for fusion to work before we inline build/augment
996 -- in phase 1. This made a difference in 'ansi' where an
997 -- overloaded function wasn't inlined till too late.
999 -- Need phase 1 so that build/augment get
1000 -- inlined. I found that spectral/hartel/genfft lost some useful
1001 -- strictness in the function sumcode' if augment is not inlined
1002 -- before strictness analysis runs
1003 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1004 | phase <- [phases, phases-1 .. 1] ]
1007 -- initial simplify: mk specialiser happy: minimum effort please
1008 simpl_gently = CoreDoSimplify SimplGently [
1009 -- Simplify "gently"
1010 -- Don't inline anything till full laziness has bitten
1011 -- In particular, inlining wrappers inhibits floating
1012 -- e.g. ...(case f x of ...)...
1013 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1014 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1015 -- and now the redex (f x) isn't floatable any more
1016 -- Similarly, don't apply any rules until after full
1017 -- laziness. Notably, list fusion can prevent floating.
1019 NoCaseOfCase, -- Don't do case-of-case transformations.
1020 -- This makes full laziness work better
1021 MaxSimplifierIterations max_iter
1025 if opt_level == 0 then
1027 simpl_phase 0 ["final"] max_iter]
1028 else {- opt_level >= 1 -} [
1030 -- We want to do the static argument transform before full laziness as it
1031 -- may expose extra opportunities to float things outwards. However, to fix
1032 -- up the output of the transformation we need at do at least one simplify
1033 -- after this before anything else
1034 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1036 -- We run vectorisation here for now, but we might also try to run
1040 -- initial simplify: mk specialiser happy: minimum effort please
1043 -- Specialisation is best done before full laziness
1044 -- so that overloaded functions have all their dictionary lambdas manifest
1047 runWhen full_laziness (CoreDoFloatOutwards gentleFloatOutSwitches),
1053 -- Phase 0: allow all Ids to be inlined now
1054 -- This gets foldr inlined before strictness analysis
1056 -- At least 3 iterations because otherwise we land up with
1057 -- huge dead expressions because of an infelicity in the
1059 -- let k = BIG in foldr k z xs
1060 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1061 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1063 simpl_phase 0 ["main"] (max max_iter 3),
1066 #ifdef OLD_STRICTNESS
1067 CoreDoOldStrictness,
1069 runWhen strictness (CoreDoPasses [
1071 CoreDoWorkerWrapper,
1073 simpl_phase 0 ["post-worker-wrapper"] max_iter
1076 runWhen full_laziness
1077 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1078 -- nofib/spectral/hartel/wang doubles in speed if you
1079 -- do full laziness late in the day. It only happens
1080 -- after fusion and other stuff, so the early pass doesn't
1081 -- catch it. For the record, the redex is
1082 -- f_el22 (f_el21 r_midblock)
1085 runWhen cse CoreCSE,
1086 -- We want CSE to follow the final full-laziness pass, because it may
1087 -- succeed in commoning up things floated out by full laziness.
1088 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1094 -- Case-liberation for -O2. This should be after
1095 -- strictness analysis and the simplification which follows it.
1096 runWhen liberate_case (CoreDoPasses [
1098 simpl_phase 0 ["post-liberate-case"] max_iter
1099 ]), -- Run the simplifier after LiberateCase to vastly
1100 -- reduce the possiblility of shadowing
1101 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1103 runWhen spec_constr CoreDoSpecConstr,
1107 -- Final clean-up simplification:
1108 simpl_phase 0 ["final"] max_iter
1111 -- -----------------------------------------------------------------------------
1112 -- StgToDo: abstraction of stg-to-stg passes to run.
1115 = StgDoMassageForProfiling -- should be (next to) last
1116 -- There's also setStgVarInfo, but its absolute "lastness"
1117 -- is so critical that it is hardwired in (no flag).
1120 getStgToDo :: DynFlags -> [StgToDo]
1122 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1125 stg_stats = dopt Opt_StgStats dflags
1127 todo1 = if stg_stats then [D_stg_stats] else []
1129 todo2 | WayProf `elem` wayNames dflags
1130 = StgDoMassageForProfiling : todo1
1134 -- -----------------------------------------------------------------------------
1137 allFlags :: [String]
1138 allFlags = map ('-':) $
1139 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1140 map ("fno-"++) flags ++
1141 map ("f"++) flags ++
1142 map ("X"++) supportedLanguages ++
1143 map ("XNo"++) supportedLanguages
1144 where ok (PrefixPred _ _) = False
1146 flags = [ name | (name, _, _) <- fFlags ]
1148 dynamic_flags :: [Flag DynP]
1150 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1151 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1152 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1153 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1154 , Flag "v" (OptIntSuffix setVerbosity) Supported
1156 ------- Specific phases --------------------------------------------
1157 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1158 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1159 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1160 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1161 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1162 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1163 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1164 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1165 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1166 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1168 , Flag "optL" (HasArg (upd . addOptL)) Supported
1169 , Flag "optP" (HasArg (upd . addOptP)) Supported
1170 , Flag "optF" (HasArg (upd . addOptF)) Supported
1171 , Flag "optc" (HasArg (upd . addOptc)) Supported
1172 , Flag "optm" (HasArg (upd . addOptm)) Supported
1173 , Flag "opta" (HasArg (upd . addOpta)) Supported
1174 , Flag "optl" (HasArg (upd . addOptl)) Supported
1175 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1178 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1181 -------- ghc -M -----------------------------------------------------
1182 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1183 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1184 (Deprecated "Use -dep-suffix instead")
1185 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1186 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1187 (Deprecated "Use -dep-makefile instead")
1188 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1189 (Deprecated "-optdep-w doesn't do anything")
1190 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1191 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1192 (Deprecated "Use -include-pkg-deps instead")
1193 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1194 (Deprecated "Use -include-pkg-deps instead")
1195 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1196 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1197 (Deprecated "Use -exclude-module instead")
1198 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1199 (Deprecated "Use -exclude-module instead")
1201 -------- Linking ----------------------------------------------------
1202 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1204 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1205 (Deprecated "Use -c instead")
1206 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1208 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1211 ------- Libraries ---------------------------------------------------
1212 , Flag "L" (Prefix addLibraryPath ) Supported
1213 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1215 ------- Frameworks --------------------------------------------------
1216 -- -framework-path should really be -F ...
1217 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1218 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1220 ------- Output Redirection ------------------------------------------
1221 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1222 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1223 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1224 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1225 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1226 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1227 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1228 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1229 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1230 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1231 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1234 ------- Keeping temporary files -------------------------------------
1235 -- These can be singular (think ghc -c) or plural (think ghc --make)
1236 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1237 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1238 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1239 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1240 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1241 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1242 -- This only makes sense as plural
1243 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1245 ------- Miscellaneous ----------------------------------------------
1246 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1247 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1248 , Flag "main-is" (SepArg setMainIs ) Supported
1249 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1250 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1251 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1253 ------- recompilation checker --------------------------------------
1254 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1255 (Deprecated "Use -fno-force-recomp instead")
1256 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1257 (Deprecated "Use -fforce-recomp instead")
1259 ------ HsCpp opts ---------------------------------------------------
1260 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1261 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1263 ------- Include/Import Paths ----------------------------------------
1264 , Flag "I" (Prefix addIncludePath) Supported
1265 , Flag "i" (OptPrefix addImportPath ) Supported
1267 ------ Debugging ----------------------------------------------------
1268 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1270 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1272 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1274 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1276 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1278 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1280 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1282 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1284 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1286 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1288 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1290 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1292 , Flag "ddump-asm-regalloc-stages"
1293 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1295 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1297 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1299 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1301 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1303 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1305 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1307 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1309 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1311 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1313 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1315 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1317 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1319 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1321 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1323 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1325 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1327 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1329 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1331 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1333 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1335 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1337 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1339 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1341 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1343 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1345 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1347 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1349 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1351 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1353 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1355 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1357 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1359 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1361 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1363 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1365 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1367 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1369 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1371 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1373 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1375 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1377 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1379 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1382 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1384 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1386 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1388 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1390 , Flag "dshow-passes"
1391 (NoArg (do forceRecompile
1392 setVerbosity (Just 2)))
1394 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1397 ------ Machine dependant (-m<blah>) stuff ---------------------------
1399 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1401 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1403 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1406 ------ Warning opts -------------------------------------------------
1407 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1409 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1411 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1413 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1415 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1416 (Deprecated "Use -w instead")
1417 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1420 ------ Optimisation flags ------------------------------------------
1421 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1422 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1423 (Deprecated "Use -O0 instead")
1424 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1425 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1427 -- If the number is missing, use 1
1429 , Flag "fsimplifier-phases"
1430 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1432 , Flag "fmax-simplifier-iterations"
1433 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1436 , Flag "fspec-constr-threshold"
1437 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1439 , Flag "fno-spec-constr-threshold"
1440 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1442 , Flag "fspec-constr-count"
1443 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1445 , Flag "fno-spec-constr-count"
1446 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1448 , Flag "fliberate-case-threshold"
1449 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1451 , Flag "fno-liberate-case-threshold"
1452 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1455 , Flag "frule-check"
1456 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1458 , Flag "fcontext-stack"
1459 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1462 ------ DPH flags ----------------------------------------------------
1465 (NoArg (setDPHBackend DPHSeq))
1468 (NoArg (setDPHBackend DPHPar))
1471 (NoArg (setDPHBackend DPHThis))
1474 ------ Compiler flags -----------------------------------------------
1476 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1477 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1478 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1480 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1481 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1482 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1484 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1486 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1489 ++ map (mkFlag True "f" setDynFlag ) fFlags
1490 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1491 ++ map (mkFlag True "X" setDynFlag ) xFlags
1492 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1494 package_flags :: [Flag DynP]
1496 ------- Packages ----------------------------------------------------
1497 Flag "package-conf" (HasArg extraPkgConf_) Supported
1498 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1500 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1501 , Flag "package" (HasArg exposePackage) Supported
1502 , Flag "hide-package" (HasArg hidePackage) Supported
1503 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1505 , Flag "ignore-package" (HasArg ignorePackage)
1507 , Flag "syslib" (HasArg exposePackage)
1508 (Deprecated "Use -package instead")
1511 mkFlag :: Bool -- ^ True <=> it should be turned on
1512 -> String -- ^ The flag prefix
1513 -> (DynFlag -> DynP ())
1514 -> (String, DynFlag, Bool -> Deprecated)
1516 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1517 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1519 deprecatedForLanguage :: String -> Bool -> Deprecated
1520 deprecatedForLanguage lang turn_on
1521 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1523 flag | turn_on = lang
1524 | otherwise = "No"++lang
1526 useInstead :: String -> Bool -> Deprecated
1527 useInstead flag turn_on
1528 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1530 no = if turn_on then "" else "no-"
1532 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1533 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1535 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1536 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1537 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1538 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1539 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1540 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1541 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1542 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1543 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1544 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1545 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1546 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1547 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1548 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1549 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1550 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1551 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1552 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1553 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1554 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1555 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1556 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1557 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1558 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1559 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1560 ( "strictness", Opt_Strictness, const Supported ),
1561 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1562 ( "full-laziness", Opt_FullLaziness, const Supported ),
1563 ( "liberate-case", Opt_LiberateCase, const Supported ),
1564 ( "spec-constr", Opt_SpecConstr, const Supported ),
1565 ( "cse", Opt_CSE, const Supported ),
1566 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1567 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1568 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1569 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1570 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1571 ( "case-merge", Opt_CaseMerge, const Supported ),
1572 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1573 ( "method-sharing", Opt_MethodSharing, const Supported ),
1574 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1575 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1576 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1577 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1578 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1579 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1580 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1581 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1582 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1583 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1584 ( "break-on-error", Opt_BreakOnError, const Supported ),
1585 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1586 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1587 ( "run-cps", Opt_RunCPSZ, const Supported ),
1588 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1589 ( "vectorise", Opt_Vectorise, const Supported ),
1590 ( "regs-graph", Opt_RegsGraph, const Supported ),
1591 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1592 ( "th", Opt_TemplateHaskell,
1593 deprecatedForLanguage "TemplateHaskell" ),
1594 ( "fi", Opt_ForeignFunctionInterface,
1595 deprecatedForLanguage "ForeignFunctionInterface" ),
1596 ( "ffi", Opt_ForeignFunctionInterface,
1597 deprecatedForLanguage "ForeignFunctionInterface" ),
1598 ( "arrows", Opt_Arrows,
1599 deprecatedForLanguage "Arrows" ),
1600 ( "generics", Opt_Generics,
1601 deprecatedForLanguage "Generics" ),
1602 ( "implicit-prelude", Opt_ImplicitPrelude,
1603 deprecatedForLanguage "ImplicitPrelude" ),
1604 ( "bang-patterns", Opt_BangPatterns,
1605 deprecatedForLanguage "BangPatterns" ),
1606 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1607 deprecatedForLanguage "MonomorphismRestriction" ),
1608 ( "mono-pat-binds", Opt_MonoPatBinds,
1609 deprecatedForLanguage "MonoPatBinds" ),
1610 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1611 deprecatedForLanguage "ExtendedDefaultRules" ),
1612 ( "implicit-params", Opt_ImplicitParams,
1613 deprecatedForLanguage "ImplicitParams" ),
1614 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1615 deprecatedForLanguage "ScopedTypeVariables" ),
1617 deprecatedForLanguage "PArr" ),
1618 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1619 deprecatedForLanguage "OverlappingInstances" ),
1620 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1621 deprecatedForLanguage "UndecidableInstances" ),
1622 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1623 deprecatedForLanguage "IncoherentInstances" ),
1624 ( "gen-manifest", Opt_GenManifest, const Supported ),
1625 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1626 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1629 supportedLanguages :: [String]
1630 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1632 -- This may contain duplicates
1633 languageOptions :: [DynFlag]
1634 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1636 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1637 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1639 ( "CPP", Opt_Cpp, const Supported ),
1640 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1641 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1642 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1643 ( "MagicHash", Opt_MagicHash, const Supported ),
1644 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1645 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1646 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1647 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1648 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1649 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1650 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1651 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1652 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1653 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1654 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1655 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1656 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1657 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1658 ( "Arrows", Opt_Arrows, const Supported ),
1659 ( "PArr", Opt_PArr, const Supported ),
1660 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1661 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1662 ( "Generics", Opt_Generics, const Supported ),
1664 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1665 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1666 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1667 ( "RecordPuns", Opt_RecordPuns,
1668 deprecatedForLanguage "NamedFieldPuns" ),
1669 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1670 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1671 ( "GADTs", Opt_GADTs, const Supported ),
1672 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1673 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1674 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1676 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1677 -- On by default (which is not strictly H98):
1678 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1679 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1680 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1681 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1682 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1684 ( "PatternSignatures", Opt_ScopedTypeVariables,
1685 deprecatedForLanguage "ScopedTypeVariables" ),
1687 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1688 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1689 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1690 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1691 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1692 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1693 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1694 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1695 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1696 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1697 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1698 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1699 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1700 ( "PackageImports", Opt_PackageImports, const Supported ),
1701 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1704 impliedFlags :: [(DynFlag, DynFlag)]
1706 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1707 -- be completely rigid for GADTs
1709 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1710 -- Note [Scoped tyvars] in TcBinds
1713 glasgowExtsFlags :: [DynFlag]
1714 glasgowExtsFlags = [
1715 Opt_PrintExplicitForalls
1716 , Opt_ForeignFunctionInterface
1717 , Opt_UnliftedFFITypes
1719 , Opt_ImplicitParams
1720 , Opt_ScopedTypeVariables
1722 , Opt_TypeSynonymInstances
1723 , Opt_StandaloneDeriving
1724 , Opt_DeriveDataTypeable
1725 , Opt_FlexibleContexts
1726 , Opt_FlexibleInstances
1727 , Opt_ConstrainedClassMethods
1728 , Opt_MultiParamTypeClasses
1729 , Opt_FunctionalDependencies
1731 , Opt_PolymorphicComponents
1732 , Opt_ExistentialQuantification
1734 , Opt_PostfixOperators
1736 , Opt_LiberalTypeSynonyms
1738 , Opt_ImpredicativeTypes
1741 , Opt_ParallelListComp
1742 , Opt_EmptyDataDecls
1743 , Opt_KindSignatures
1744 , Opt_GeneralizedNewtypeDeriving
1745 , Opt_TypeFamilies ]
1747 -- -----------------------------------------------------------------------------
1748 -- Parsing the dynamic flags.
1750 -- | Parse dynamic flags from a list of command line arguments. Returns the
1751 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1752 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1753 -- flags or missing arguments).
1754 parseDynamicFlags :: Monad m =>
1755 DynFlags -> [Located String]
1756 -> m (DynFlags, [Located String], [Located String])
1757 -- ^ Updated 'DynFlags', left-over arguments, and
1758 -- list of warnings.
1759 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1761 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1762 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1763 parseDynamicNoPackageFlags :: Monad m =>
1764 DynFlags -> [Located String]
1765 -> m (DynFlags, [Located String], [Located String])
1766 -- ^ Updated 'DynFlags', left-over arguments, and
1767 -- list of warnings.
1768 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1770 parseDynamicFlags_ :: Monad m =>
1771 DynFlags -> [Located String] -> Bool
1772 -> m (DynFlags, [Located String], [Located String])
1773 parseDynamicFlags_ dflags args pkg_flags = do
1774 -- XXX Legacy support code
1775 -- We used to accept things like
1776 -- optdep-f -optdepdepend
1777 -- optdep-f -optdep depend
1778 -- optdep -f -optdepdepend
1779 -- optdep -f -optdep depend
1780 -- but the spaces trip up proper argument handling. So get rid of them.
1781 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1782 f (x : xs) = x : f xs
1786 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1787 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1788 | otherwise = dynamic_flags
1790 let ((leftover, errs, warns), dflags')
1791 = runCmdLine (processArgs flag_spec args') dflags
1792 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1793 return (dflags', leftover, warns)
1795 type DynP = CmdLineP DynFlags
1797 upd :: (DynFlags -> DynFlags) -> DynP ()
1799 dfs <- getCmdLineState
1800 putCmdLineState $! (f dfs)
1802 --------------------------
1803 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1804 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1805 ; mapM_ setDynFlag deps }
1807 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1808 -- When you set f, set the ones it implies
1809 -- NB: use setDynFlag recursively, in case the implied flags
1810 -- implies further flags
1811 -- When you un-set f, however, we don't un-set the things it implies
1812 -- (except for -fno-glasgow-exts, which is treated specially)
1814 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1816 --------------------------
1817 setDumpFlag :: DynFlag -> OptKind DynP
1818 setDumpFlag dump_flag
1819 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1821 -- Certain dumpy-things are really interested in what's going
1822 -- on during recompilation checking, so in those cases we
1823 -- don't want to turn it off.
1824 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1825 Opt_D_dump_hi_diffs]
1827 forceRecompile :: DynP ()
1828 -- Whenver we -ddump, force recompilation (by switching off the
1829 -- recompilation checker), else you don't see the dump! However,
1830 -- don't switch it off in --make mode, else *everything* gets
1831 -- recompiled which probably isn't what you want
1832 forceRecompile = do { dfs <- getCmdLineState
1833 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1835 force_recomp dfs = isOneShot (ghcMode dfs)
1837 setVerboseCore2Core :: DynP ()
1838 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1840 upd (\s -> s { shouldDumpSimplPhase = const True })
1842 setDumpSimplPhases :: String -> DynP ()
1843 setDumpSimplPhases s = do forceRecompile
1844 upd (\s -> s { shouldDumpSimplPhase = spec })
1846 spec :: SimplifierMode -> Bool
1848 . map (join (&&) . map match . split ':')
1854 join :: (Bool -> Bool -> Bool)
1855 -> [SimplifierMode -> Bool]
1856 -> SimplifierMode -> Bool
1857 join _ [] = const True
1858 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1860 match :: String -> SimplifierMode -> Bool
1861 match "" = const True
1862 match s = case reads s of
1863 [(n,"")] -> phase_num n
1866 phase_num :: Int -> SimplifierMode -> Bool
1867 phase_num n (SimplPhase k _) = n == k
1868 phase_num _ _ = False
1870 phase_name :: String -> SimplifierMode -> Bool
1871 phase_name s SimplGently = s == "gentle"
1872 phase_name s (SimplPhase _ ss) = s `elem` ss
1874 setVerbosity :: Maybe Int -> DynP ()
1875 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1877 addCmdlineHCInclude :: String -> DynP ()
1878 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1880 extraPkgConf_ :: FilePath -> DynP ()
1881 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1883 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1885 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1887 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1889 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1891 setPackageName :: String -> DynFlags -> DynFlags
1893 | Nothing <- unpackPackageId pid
1894 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1896 = \s -> s{ thisPackage = pid }
1898 pid = stringToPackageId p
1900 -- If we're linking a binary, then only targets that produce object
1901 -- code are allowed (requests for other target types are ignored).
1902 setTarget :: HscTarget -> DynP ()
1903 setTarget l = upd set
1906 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1909 -- Changes the target only if we're compiling object code. This is
1910 -- used by -fasm and -fvia-C, which switch from one to the other, but
1911 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1912 -- can be safely used in an OPTIONS_GHC pragma.
1913 setObjTarget :: HscTarget -> DynP ()
1914 setObjTarget l = upd set
1917 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1920 setOptLevel :: Int -> DynFlags -> DynFlags
1921 setOptLevel n dflags
1922 | hscTarget dflags == HscInterpreted && n > 0
1924 -- not in IO any more, oh well:
1925 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1927 = updOptLevel n dflags
1930 -- -Odph is equivalent to
1932 -- -O2 optimise as much as possible
1933 -- -fno-method-sharing sharing specialisation defeats fusion
1935 -- -fdicts-cheap always inline dictionaries
1936 -- -fmax-simplifier-iterations20 this is necessary sometimes
1937 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1938 -- -fno-spec-constr-count SpecConstr as much as possible
1939 -- -finline-enough-args hack to prevent excessive inlining
1941 setDPHOpt :: DynFlags -> DynFlags
1942 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1943 , specConstrThreshold = Nothing
1944 , specConstrCount = Nothing
1946 `dopt_set` Opt_DictsCheap
1947 `dopt_unset` Opt_MethodSharing
1948 `dopt_set` Opt_InlineIfEnoughArgs
1950 data DPHBackend = DPHPar
1953 deriving(Eq, Ord, Enum, Show)
1955 setDPHBackend :: DPHBackend -> DynP ()
1956 setDPHBackend backend
1958 upd $ \dflags -> dflags { dphBackend = backend }
1959 mapM_ exposePackage (dph_packages backend)
1961 dph_packages DPHThis = []
1962 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1963 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1965 dphPackage :: DynFlags -> PackageId
1966 dphPackage dflags = case dphBackend dflags of
1967 DPHPar -> dphParPackageId
1968 DPHSeq -> dphSeqPackageId
1969 DPHThis -> thisPackage dflags
1971 setMainIs :: String -> DynP ()
1973 | not (null main_fn) && isLower (head main_fn)
1974 -- The arg looked like "Foo.Bar.baz"
1975 = upd $ \d -> d{ mainFunIs = Just main_fn,
1976 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1978 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1979 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1981 | otherwise -- The arg looked like "baz"
1982 = upd $ \d -> d{ mainFunIs = Just arg }
1984 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1986 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1987 -- Either returns the default name or the one configured on the command line with -main-is
1988 getMainFun :: DynFlags -> RdrName
1989 getMainFun dflags = case (mainFunIs dflags) of
1990 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1991 Nothing -> main_RDR_Unqual
1993 -----------------------------------------------------------------------------
1994 -- Paths & Libraries
1996 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1998 -- -i on its own deletes the import paths
1999 addImportPath "" = upd (\s -> s{importPaths = []})
2000 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2004 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2007 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2009 addFrameworkPath p =
2010 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2012 #ifndef mingw32_TARGET_OS
2013 split_marker :: Char
2014 split_marker = ':' -- not configurable (ToDo)
2017 splitPathList :: String -> [String]
2018 splitPathList s = filter notNull (splitUp s)
2019 -- empty paths are ignored: there might be a trailing
2020 -- ':' in the initial list, for example. Empty paths can
2021 -- cause confusion when they are translated into -I options
2022 -- for passing to gcc.
2024 #ifndef mingw32_TARGET_OS
2025 splitUp xs = split split_marker xs
2027 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2029 -- That is, if "foo:bar:baz" is used, this interpreted as
2030 -- consisting of three entries, 'foo', 'bar', 'baz'.
2031 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2032 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2034 -- Notice that no attempt is made to fully replace the 'standard'
2035 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2036 -- that this will cause too much breakage for users & ':' will
2037 -- work fine even with DOS paths, if you're not insisting on being silly.
2040 splitUp (x:':':div:xs) | div `elem` dir_markers
2041 = ((x:':':div:p): splitUp rs)
2043 (p,rs) = findNextPath xs
2044 -- we used to check for existence of the path here, but that
2045 -- required the IO monad to be threaded through the command-line
2046 -- parser which is quite inconvenient. The
2047 splitUp xs = cons p (splitUp rs)
2049 (p,rs) = findNextPath xs
2054 -- will be called either when we've consumed nought or the
2055 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2056 -- finding the next split marker.
2058 case break (`elem` split_markers) xs of
2059 (p, _:ds) -> (p, ds)
2062 split_markers :: [Char]
2063 split_markers = [':', ';']
2065 dir_markers :: [Char]
2066 dir_markers = ['/', '\\']
2069 -- -----------------------------------------------------------------------------
2070 -- tmpDir, where we store temporary files.
2072 setTmpDir :: FilePath -> DynFlags -> DynFlags
2073 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2074 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2075 -- seem necessary now --SDM 7/2/2008
2077 -----------------------------------------------------------------------------
2080 setOptHpcDir :: String -> DynP ()
2081 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2083 -----------------------------------------------------------------------------
2084 -- Via-C compilation stuff
2086 -- There are some options that we need to pass to gcc when compiling
2087 -- Haskell code via C, but are only supported by recent versions of
2088 -- gcc. The configure script decides which of these options we need,
2089 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2090 -- read before each via-C compilation. The advantage of having these
2091 -- in a separate file is that the file can be created at install-time
2092 -- depending on the available gcc version, and even re-generated later
2093 -- if gcc is upgraded.
2095 -- The options below are not dependent on the version of gcc, only the
2098 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2099 [String]) -- for registerised HC compilations
2100 machdepCCOpts _dflags
2101 #if alpha_TARGET_ARCH
2103 #ifdef HAVE_THREADED_RTS_SUPPORT
2107 -- For now, to suppress the gcc warning "call-clobbered
2108 -- register used for global register variable", we simply
2109 -- disable all warnings altogether using the -w flag. Oh well.
2111 #elif hppa_TARGET_ARCH
2112 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2113 -- (very nice, but too bad the HP /usr/include files don't agree.)
2114 = ( ["-D_HPUX_SOURCE"], [] )
2116 #elif m68k_TARGET_ARCH
2117 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2118 -- popping of args to routines to be explicit; if we let things
2119 -- be deferred 'til after an STGJUMP, imminent death is certain!
2121 -- -fomit-frame-pointer : *don't*
2122 -- It's better to have a6 completely tied up being a frame pointer
2123 -- rather than let GCC pick random things to do with it.
2124 -- (If we want to steal a6, then we would try to do things
2125 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2126 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2128 #elif i386_TARGET_ARCH
2129 -- -fno-defer-pop : basically the same game as for m68k
2131 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2132 -- the fp (%ebp) for our register maps.
2133 = let n_regs = stolen_x86_regs _dflags
2136 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2139 "-fomit-frame-pointer",
2140 -- we want -fno-builtin, because when gcc inlines
2141 -- built-in functions like memcpy() it tends to
2142 -- run out of registers, requiring -monly-n-regs
2144 "-DSTOLEN_X86_REGS="++show n_regs ]
2147 #elif ia64_TARGET_ARCH
2148 = ( [], ["-fomit-frame-pointer", "-G0"] )
2150 #elif x86_64_TARGET_ARCH
2151 = ( [], ["-fomit-frame-pointer",
2152 "-fno-asynchronous-unwind-tables",
2153 -- the unwind tables are unnecessary for HC code,
2154 -- and get in the way of -split-objs. Another option
2155 -- would be to throw them away in the mangler, but this
2158 -- calling builtins like strlen() using the FFI can
2159 -- cause gcc to run out of regs, so use the external
2163 #elif sparc_TARGET_ARCH
2165 -- For now, to suppress the gcc warning "call-clobbered
2166 -- register used for global register variable", we simply
2167 -- disable all warnings altogether using the -w flag. Oh well.
2169 #elif powerpc_apple_darwin_TARGET
2171 -- Disable Apple's precompiling preprocessor. It's a great thing
2172 -- for "normal" programs, but it doesn't support register variable
2174 = ( [], ["-no-cpp-precomp"] )
2179 picCCOpts :: DynFlags -> [String]
2181 #if darwin_TARGET_OS
2182 -- Apple prefers to do things the other way round.
2183 -- PIC is on by default.
2184 -- -mdynamic-no-pic:
2185 -- Turn off PIC code generation.
2187 -- Don't generate "common" symbols - these are unwanted
2188 -- in dynamic libraries.
2191 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2193 = ["-mdynamic-no-pic"]
2194 #elif mingw32_TARGET_OS
2195 -- no -fPIC for Windows
2197 = ["-U __PIC__","-D__PIC__"]
2202 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2207 -- -----------------------------------------------------------------------------
2211 can_split = cSplitObjs == "YES"
2213 -- -----------------------------------------------------------------------------
2216 compilerInfo :: [(String, String)]
2217 compilerInfo = [("Project name", cProjectName),
2218 ("Project version", cProjectVersion),
2219 ("Booter version", cBooterVersion),
2221 ("Interface file version", cHscIfaceFileVersion),
2222 ("Have interpreter", cGhcWithInterpreter),
2223 ("Object splitting", cSplitObjs),
2224 ("Have native code generator", cGhcWithNativeCodeGen),
2225 ("Support SMP", cGhcWithSMP),
2226 ("Unregisterised", cGhcUnregisterised),
2227 ("Tables next to code", cGhcEnableTablesNextToCode),
2228 ("Win32 DLLs", cEnableWin32DLLs),
2229 ("RTS ways", cGhcRTSWays),
2230 ("Leading underscore", cLeadingUnderscore),
2231 ("Debug on", show debugIsOn)