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_EagerBlackHoling
279 | Opt_ReadUserPackageConf
283 | Opt_HideAllPackages
284 | Opt_PrintBindResult
288 | Opt_BreakOnException
290 | Opt_PrintEvldWithShow
291 | Opt_PrintBindContents
298 | Opt_ConvertToZipCfgAndBack
299 | Opt_AutoLinkPackages
300 | Opt_ImplicitImportQualified
309 | Opt_KeepRawTokenStream
313 -- | Contains not only a collection of 'DynFlag's but also a plethora of
314 -- information relating to the compilation of a single file or GHC session
315 data DynFlags = DynFlags {
318 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
319 stgToDo :: Maybe [StgToDo], -- similarly
320 hscTarget :: HscTarget,
321 hscOutName :: String, -- ^ Name of the output file
322 extCoreName :: String, -- ^ Name of the .hcr output file
323 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
324 optLevel :: Int, -- ^ Optimisation level
325 simplPhases :: Int, -- ^ Number of simplifier phases
326 maxSimplIterations :: Int, -- ^ Max simplifier iterations
327 shouldDumpSimplPhase :: SimplifierMode -> Bool,
328 ruleCheck :: Maybe String,
330 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
331 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
332 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
334 stolen_x86_regs :: Int,
335 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
336 importPaths :: [FilePath],
338 mainFunIs :: Maybe String,
339 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
341 dphBackend :: DPHBackend,
343 thisPackage :: PackageId, -- ^ name of package currently being compiled
346 wayNames :: [WayName], -- ^ Way flags from the command line
347 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
348 rtsBuildTag :: String, -- ^ The RTS \"way\"
351 objectDir :: Maybe String,
352 hiDir :: Maybe String,
353 stubDir :: Maybe String,
359 outputFile :: Maybe String,
360 outputHi :: Maybe String,
361 dynLibLoader :: DynLibLoader,
363 -- | This is set by 'DriverPipeline.runPipeline' based on where
364 -- its output is going.
365 dumpPrefix :: Maybe FilePath,
367 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
368 -- Set by @-ddump-file-prefix@
369 dumpPrefixForce :: Maybe FilePath,
371 includePaths :: [String],
372 libraryPaths :: [String],
373 frameworkPaths :: [String], -- used on darwin only
374 cmdlineFrameworks :: [String], -- ditto
375 tmpDir :: String, -- no trailing '/'
377 ghcUsagePath :: FilePath, -- Filled in by SysTools
378 ghciUsagePath :: FilePath, -- ditto
380 hpcDir :: String, -- ^ Path to store the .mix files
382 -- options for particular phases
390 opt_windres :: [String],
392 -- commands for particular phases
394 pgm_P :: (String,[Option]),
396 pgm_c :: (String,[Option]),
397 pgm_m :: (String,[Option]),
398 pgm_s :: (String,[Option]),
399 pgm_a :: (String,[Option]),
400 pgm_l :: (String,[Option]),
401 pgm_dll :: (String,[Option]),
403 pgm_sysman :: String,
404 pgm_windres :: String,
407 depMakefile :: FilePath,
408 depIncludePkgDeps :: Bool,
409 depExcludeMods :: [ModuleName],
410 depSuffixes :: [String],
414 extraPkgConfs :: [FilePath],
415 topDir :: FilePath, -- filled in by SysTools
416 systemPackageConfig :: FilePath, -- ditto
417 -- ^ The @-package-conf@ flags given on the command line, in the order
420 packageFlags :: [PackageFlag],
421 -- ^ The @-package@ and @-hide-package@ flags from the command-line
424 -- NB. do not modify this field, it is calculated by
425 -- Packages.initPackages and Packages.updatePackages.
426 pkgDatabase :: Maybe (UniqFM PackageConfig),
427 pkgState :: PackageState,
432 -- | Message output action: use "ErrUtils" instead of this if you can
433 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
435 haddockOptions :: Maybe String
438 -- | The target code type of the compilation (if any).
440 -- 'HscNothing' can be used to avoid generating any output, however, note
443 -- * This will not run the desugaring step, thus no warnings generated in
444 -- this step will be output. In particular, this includes warnings
445 -- related to pattern matching.
447 -- * At the moment switching from 'HscNothing' to 'HscInterpreted' without
448 -- unloading first is not safe. To unload use
449 -- @GHC.setTargets [] >> GHC.load LoadAllTargets@.
459 -- | Will this target result in an object file on the disk?
460 isObjectTarget :: HscTarget -> Bool
461 isObjectTarget HscC = True
462 isObjectTarget HscAsm = True
463 isObjectTarget _ = False
465 -- | The 'GhcMode' tells us whether we're doing multi-module
466 -- compilation (controlled via the "GHC" API) or one-shot
467 -- (single-module) compilation. This makes a difference primarily to
468 -- the "Finder": in one-shot mode we look for interface files for
469 -- imported modules, but in multi-module mode we look for source files
470 -- in order to check whether they need to be recompiled.
472 = CompManager -- ^ @\-\-make@, GHCi, etc.
473 | OneShot -- ^ @ghc -c Foo.hs@
474 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
477 instance Outputable GhcMode where
478 ppr CompManager = ptext (sLit "CompManager")
479 ppr OneShot = ptext (sLit "OneShot")
480 ppr MkDepend = ptext (sLit "MkDepend")
482 isOneShot :: GhcMode -> Bool
483 isOneShot OneShot = True
484 isOneShot _other = False
486 -- | What to do in the link step, if there is one.
488 = NoLink -- ^ Don't link at all
489 | LinkBinary -- ^ Link object code into a binary
490 | LinkInMemory -- ^ Use the in-memory dynamic linker
491 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
494 isNoLink :: GhcLink -> Bool
495 isNoLink NoLink = True
499 = ExposePackage String
501 | IgnorePackage String
504 defaultHscTarget :: HscTarget
505 defaultHscTarget = defaultObjectTarget
507 -- | The 'HscTarget' value corresponding to the default way to create
508 -- object files on the current platform.
509 defaultObjectTarget :: HscTarget
511 | cGhcWithNativeCodeGen == "YES" = HscAsm
516 | Wrapped (Maybe String)
520 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
521 initDynFlags :: DynFlags -> IO DynFlags
522 initDynFlags dflags = do
523 -- someday these will be dynamic flags
524 ways <- readIORef v_Ways
525 build_tag <- readIORef v_Build_tag
526 rts_build_tag <- readIORef v_RTS_Build_tag
529 buildTag = build_tag,
530 rtsBuildTag = rts_build_tag
533 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
534 -- and must be fully initialized by 'GHC.newSession' first.
535 defaultDynFlags :: DynFlags
538 ghcMode = CompManager,
539 ghcLink = LinkBinary,
542 hscTarget = defaultHscTarget,
548 maxSimplIterations = 4,
549 shouldDumpSimplPhase = const False,
551 specConstrThreshold = Just 200,
552 specConstrCount = Just 3,
553 liberateCaseThreshold = Just 200,
555 cmdlineHcIncludes = [],
559 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
563 thisPackage = mainPackageId,
569 objectSuf = phaseInputExt StopLn,
570 hcSuf = phaseInputExt HCc,
573 outputFile = Nothing,
575 dynLibLoader = Deployable,
576 dumpPrefix = Nothing,
577 dumpPrefixForce = Nothing,
581 cmdlineFrameworks = [],
582 tmpDir = cDEFAULT_TMPDIR,
588 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
599 pkgDatabase = Nothing,
600 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
601 wayNames = panic "defaultDynFlags: No wayNames",
602 buildTag = panic "defaultDynFlags: No buildTag",
603 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
604 -- initSysTools fills all these in
605 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
606 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
607 topDir = panic "defaultDynFlags: No topDir",
608 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
609 pgm_L = panic "defaultDynFlags: No pgm_L",
610 pgm_P = panic "defaultDynFlags: No pgm_P",
611 pgm_F = panic "defaultDynFlags: No pgm_F",
612 pgm_c = panic "defaultDynFlags: No pgm_c",
613 pgm_m = panic "defaultDynFlags: No pgm_m",
614 pgm_s = panic "defaultDynFlags: No pgm_s",
615 pgm_a = panic "defaultDynFlags: No pgm_a",
616 pgm_l = panic "defaultDynFlags: No pgm_l",
617 pgm_dll = panic "defaultDynFlags: No pgm_dll",
618 pgm_T = panic "defaultDynFlags: No pgm_T",
619 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
620 pgm_windres = panic "defaultDynFlags: No pgm_windres",
621 -- end of initSysTools values
623 depMakefile = "Makefile",
624 depIncludePkgDeps = False,
628 -- end of ghc -M values
629 haddockOptions = Nothing,
631 Opt_AutoLinkPackages,
632 Opt_ReadUserPackageConf,
634 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
635 -- behaviour the default, to see if anyone notices
639 Opt_MonomorphismRestriction,
647 Opt_PrintBindContents
649 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
650 -- The default -O0 options
653 log_action = \severity srcSpan style msg ->
655 SevInfo -> printErrs (msg style)
656 SevFatal -> printErrs (msg style)
659 printErrs ((mkLocMessage srcSpan msg) style)
660 -- careful (#2302): printErrs prints in UTF-8, whereas
661 -- converting to string first and using hPutStr would
662 -- just emit the low 8 bits of each unicode char.
669 0 | print errors & warnings only
670 1 | minimal verbosity: print "compiling M ... done." for each module.
671 2 | equivalent to -dshow-passes
672 3 | equivalent to existing "ghc -v"
673 4 | "ghc -v -ddump-most"
674 5 | "ghc -v -ddump-all"
677 -- | Test whether a 'DynFlag' is set
678 dopt :: DynFlag -> DynFlags -> Bool
679 dopt f dflags = f `elem` (flags dflags)
682 dopt_set :: DynFlags -> DynFlag -> DynFlags
683 dopt_set dfs f = dfs{ flags = f : flags dfs }
685 -- | Unset a 'DynFlag'
686 dopt_unset :: DynFlags -> DynFlag -> DynFlags
687 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
689 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
690 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
691 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
692 -> [a] -- ^ Correctly ordered extracted options
693 getOpts dflags opts = reverse (opts dflags)
694 -- We add to the options from the front, so we need to reverse the list
696 -- | Gets the verbosity flag for the current verbosity level. This is fed to
697 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
698 getVerbFlag :: DynFlags -> String
700 | verbosity dflags >= 3 = "-v"
703 setObjectDir, setHiDir, setStubDir, setOutputDir,
704 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
705 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
706 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
707 addCmdlineFramework, addHaddockOpts
708 :: String -> DynFlags -> DynFlags
709 setOutputFile, setOutputHi, setDumpPrefixForce
710 :: Maybe String -> DynFlags -> DynFlags
712 setObjectDir f d = d{ objectDir = Just f}
713 setHiDir f d = d{ hiDir = Just f}
714 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
715 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
716 -- \#included from the .hc file when compiling with -fvia-C.
717 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
719 setObjectSuf f d = d{ objectSuf = f}
720 setHiSuf f d = d{ hiSuf = f}
721 setHcSuf f d = d{ hcSuf = f}
723 setOutputFile f d = d{ outputFile = f}
724 setOutputHi f d = d{ outputHi = f}
726 parseDynLibLoaderMode f d =
728 ("deploy", "") -> d{ dynLibLoader = Deployable }
729 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
730 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
731 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
732 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
733 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
735 setDumpPrefixForce f d = d { dumpPrefixForce = f}
737 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
738 -- Config.hs should really use Option.
739 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
741 setPgmL f d = d{ pgm_L = f}
742 setPgmF f d = d{ pgm_F = f}
743 setPgmc f d = d{ pgm_c = (f,[])}
744 setPgmm f d = d{ pgm_m = (f,[])}
745 setPgms f d = d{ pgm_s = (f,[])}
746 setPgma f d = d{ pgm_a = (f,[])}
747 setPgml f d = d{ pgm_l = (f,[])}
748 setPgmdll f d = d{ pgm_dll = (f,[])}
749 setPgmwindres f d = d{ pgm_windres = f}
751 addOptL f d = d{ opt_L = f : opt_L d}
752 addOptP f d = d{ opt_P = f : opt_P d}
753 addOptF f d = d{ opt_F = f : opt_F d}
754 addOptc f d = d{ opt_c = f : opt_c d}
755 addOptm f d = d{ opt_m = f : opt_m d}
756 addOpta f d = d{ opt_a = f : opt_a d}
757 addOptl f d = d{ opt_l = f : opt_l d}
758 addOptwindres f d = d{ opt_windres = f : opt_windres d}
760 setDepMakefile :: FilePath -> DynFlags -> DynFlags
761 setDepMakefile f d = d { depMakefile = deOptDep f }
763 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
764 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
766 addDepExcludeMod :: String -> DynFlags -> DynFlags
768 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
770 addDepSuffix :: FilePath -> DynFlags -> DynFlags
771 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
773 setDepWarnings :: Bool -> DynFlags -> DynFlags
774 setDepWarnings b d = d { depWarnings = b }
777 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
778 -- we need to strip the "-optdep" off of the arg
779 deOptDep :: String -> String
780 deOptDep x = case maybePrefixMatch "-optdep" x of
784 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
786 addHaddockOpts f d = d{ haddockOptions = Just f}
788 -- -----------------------------------------------------------------------------
789 -- Command-line options
791 -- | When invoking external tools as part of the compilation pipeline, we
792 -- pass these a sequence of options on the command-line. Rather than
793 -- just using a list of Strings, we use a type that allows us to distinguish
794 -- between filepaths and 'other stuff'. The reason for this is that
795 -- this type gives us a handle on transforming filenames, and filenames only,
796 -- to whatever format they're expected to be on a particular platform.
798 = FileOption -- an entry that _contains_ filename(s) / filepaths.
799 String -- a non-filepath prefix that shouldn't be
800 -- transformed (e.g., "/out=")
801 String -- the filepath/filename portion
804 -----------------------------------------------------------------------------
805 -- Setting the optimisation level
807 updOptLevel :: Int -> DynFlags -> DynFlags
808 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
810 = dfs2{ optLevel = final_n }
812 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
813 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
814 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
816 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
817 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
819 optLevelFlags :: [([Int], DynFlag)]
821 = [ ([0], Opt_IgnoreInterfacePragmas)
822 , ([0], Opt_OmitInterfacePragmas)
824 , ([1,2], Opt_IgnoreAsserts)
825 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
827 , ([1,2], Opt_DoEtaReduction)
828 , ([1,2], Opt_CaseMerge)
829 , ([1,2], Opt_Strictness)
831 , ([1,2], Opt_FullLaziness)
833 , ([2], Opt_LiberateCase)
834 , ([2], Opt_SpecConstr)
836 -- , ([2], Opt_StaticArgumentTransformation)
837 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
838 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
839 -- several improvements to the heuristics, and I'm concerned that without
840 -- those changes SAT will interfere with some attempts to write "high
841 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
842 -- this year. In particular, the version in HEAD lacks the tail call
843 -- criterion, so many things that look like reasonable loops will be
844 -- turned into functions with extra (unneccesary) thunk creation.
846 , ([0,1,2], Opt_DoLambdaEtaExpansion)
847 -- This one is important for a tiresome reason:
848 -- we want to make sure that the bindings for data
849 -- constructors are eta-expanded. This is probably
850 -- a good thing anyway, but it seems fragile.
853 -- -----------------------------------------------------------------------------
854 -- Standard sets of warning options
856 standardWarnings :: [DynFlag]
858 = [ Opt_WarnWarningsDeprecations,
859 Opt_WarnDeprecatedFlags,
860 Opt_WarnUnrecognisedPragmas,
861 Opt_WarnOverlappingPatterns,
862 Opt_WarnMissingFields,
863 Opt_WarnMissingMethods,
864 Opt_WarnDuplicateExports,
865 Opt_WarnDodgyForeignImports
868 minusWOpts :: [DynFlag]
870 = standardWarnings ++
871 [ Opt_WarnUnusedBinds,
872 Opt_WarnUnusedMatches,
873 Opt_WarnUnusedImports,
874 Opt_WarnIncompletePatterns,
878 minusWallOpts :: [DynFlag]
881 [ Opt_WarnTypeDefaults,
882 Opt_WarnNameShadowing,
888 -- minuswRemovesOpts should be every warning option
889 minuswRemovesOpts :: [DynFlag]
892 [Opt_WarnImplicitPrelude,
893 Opt_WarnIncompletePatternsRecUpd,
894 Opt_WarnSimplePatterns,
895 Opt_WarnMonomorphism,
896 Opt_WarnUnrecognisedPragmas,
900 -- -----------------------------------------------------------------------------
901 -- CoreToDo: abstraction of core-to-core passes to run.
903 data CoreToDo -- These are diff core-to-core passes,
904 -- which may be invoked in any order,
905 -- as many times as you like.
907 = CoreDoSimplify -- The core-to-core simplifier.
910 -- Each run of the simplifier can take a different
911 -- set of simplifier-specific flags.
913 | CoreDoFloatOutwards FloatOutSwitches
918 | CoreDoWorkerWrapper
921 | CoreDoOldStrictness
924 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
925 -- matching this string
926 | CoreDoVectorisation PackageId
927 | CoreDoNothing -- Useful when building up
928 | CoreDoPasses [CoreToDo] -- lists of these things
931 data SimplifierMode -- See comments in SimplMonad
933 | SimplPhase Int [String]
935 instance Outputable SimplifierMode where
936 ppr SimplGently = ptext (sLit "gentle")
937 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
940 data SimplifierSwitch
941 = MaxSimplifierIterations Int
945 data FloatOutSwitches = FloatOutSwitches {
946 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
947 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
948 -- even if they do not escape a lambda
951 instance Outputable FloatOutSwitches where
952 ppr = pprFloatOutSwitches
954 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
955 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
956 <+> pp_not (floatOutConstants sw) <+> text "constants"
959 pp_not False = text "not"
961 -- | Switches that specify the minimum amount of floating out
962 gentleFloatOutSwitches :: FloatOutSwitches
963 gentleFloatOutSwitches = FloatOutSwitches False False
965 -- | Switches that do not specify floating out of lambdas, just of constants
966 constantsOnlyFloatOutSwitches :: FloatOutSwitches
967 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
970 -- The core-to-core pass ordering is derived from the DynFlags:
971 runWhen :: Bool -> CoreToDo -> CoreToDo
972 runWhen True do_this = do_this
973 runWhen False _ = CoreDoNothing
975 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
976 runMaybe (Just x) f = f x
977 runMaybe Nothing _ = CoreDoNothing
979 getCoreToDo :: DynFlags -> [CoreToDo]
981 | Just todo <- coreToDo dflags = todo -- set explicitly by user
982 | otherwise = core_todo
984 opt_level = optLevel dflags
985 phases = simplPhases dflags
986 max_iter = maxSimplIterations dflags
987 strictness = dopt Opt_Strictness dflags
988 full_laziness = dopt Opt_FullLaziness dflags
989 cse = dopt Opt_CSE dflags
990 spec_constr = dopt Opt_SpecConstr dflags
991 liberate_case = dopt Opt_LiberateCase dflags
992 rule_check = ruleCheck dflags
993 static_args = dopt Opt_StaticArgumentTransformation dflags
995 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
997 simpl_phase phase names iter
999 [ CoreDoSimplify (SimplPhase phase names) [
1000 MaxSimplifierIterations iter
1002 maybe_rule_check phase
1006 = runWhen (dopt Opt_Vectorise dflags)
1007 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1010 -- By default, we have 2 phases before phase 0.
1012 -- Want to run with inline phase 2 after the specialiser to give
1013 -- maximum chance for fusion to work before we inline build/augment
1014 -- in phase 1. This made a difference in 'ansi' where an
1015 -- overloaded function wasn't inlined till too late.
1017 -- Need phase 1 so that build/augment get
1018 -- inlined. I found that spectral/hartel/genfft lost some useful
1019 -- strictness in the function sumcode' if augment is not inlined
1020 -- before strictness analysis runs
1021 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1022 | phase <- [phases, phases-1 .. 1] ]
1025 -- initial simplify: mk specialiser happy: minimum effort please
1026 simpl_gently = CoreDoSimplify SimplGently [
1027 -- Simplify "gently"
1028 -- Don't inline anything till full laziness has bitten
1029 -- In particular, inlining wrappers inhibits floating
1030 -- e.g. ...(case f x of ...)...
1031 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1032 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1033 -- and now the redex (f x) isn't floatable any more
1034 -- Similarly, don't apply any rules until after full
1035 -- laziness. Notably, list fusion can prevent floating.
1037 NoCaseOfCase, -- Don't do case-of-case transformations.
1038 -- This makes full laziness work better
1039 MaxSimplifierIterations max_iter
1043 if opt_level == 0 then
1045 simpl_phase 0 ["final"] max_iter]
1046 else {- opt_level >= 1 -} [
1048 -- We want to do the static argument transform before full laziness as it
1049 -- may expose extra opportunities to float things outwards. However, to fix
1050 -- up the output of the transformation we need at do at least one simplify
1051 -- after this before anything else
1052 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1054 -- We run vectorisation here for now, but we might also try to run
1058 -- initial simplify: mk specialiser happy: minimum effort please
1061 -- Specialisation is best done before full laziness
1062 -- so that overloaded functions have all their dictionary lambdas manifest
1065 runWhen full_laziness (CoreDoFloatOutwards gentleFloatOutSwitches),
1071 -- Phase 0: allow all Ids to be inlined now
1072 -- This gets foldr inlined before strictness analysis
1074 -- At least 3 iterations because otherwise we land up with
1075 -- huge dead expressions because of an infelicity in the
1077 -- let k = BIG in foldr k z xs
1078 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1079 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1081 simpl_phase 0 ["main"] (max max_iter 3),
1084 #ifdef OLD_STRICTNESS
1085 CoreDoOldStrictness,
1087 runWhen strictness (CoreDoPasses [
1089 CoreDoWorkerWrapper,
1091 simpl_phase 0 ["post-worker-wrapper"] max_iter
1094 runWhen full_laziness
1095 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1096 -- nofib/spectral/hartel/wang doubles in speed if you
1097 -- do full laziness late in the day. It only happens
1098 -- after fusion and other stuff, so the early pass doesn't
1099 -- catch it. For the record, the redex is
1100 -- f_el22 (f_el21 r_midblock)
1103 runWhen cse CoreCSE,
1104 -- We want CSE to follow the final full-laziness pass, because it may
1105 -- succeed in commoning up things floated out by full laziness.
1106 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1112 -- Case-liberation for -O2. This should be after
1113 -- strictness analysis and the simplification which follows it.
1114 runWhen liberate_case (CoreDoPasses [
1116 simpl_phase 0 ["post-liberate-case"] max_iter
1117 ]), -- Run the simplifier after LiberateCase to vastly
1118 -- reduce the possiblility of shadowing
1119 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1121 runWhen spec_constr CoreDoSpecConstr,
1125 -- Final clean-up simplification:
1126 simpl_phase 0 ["final"] max_iter
1129 -- -----------------------------------------------------------------------------
1130 -- StgToDo: abstraction of stg-to-stg passes to run.
1133 = StgDoMassageForProfiling -- should be (next to) last
1134 -- There's also setStgVarInfo, but its absolute "lastness"
1135 -- is so critical that it is hardwired in (no flag).
1138 getStgToDo :: DynFlags -> [StgToDo]
1140 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1143 stg_stats = dopt Opt_StgStats dflags
1145 todo1 = if stg_stats then [D_stg_stats] else []
1147 todo2 | WayProf `elem` wayNames dflags
1148 = StgDoMassageForProfiling : todo1
1152 -- -----------------------------------------------------------------------------
1155 allFlags :: [String]
1156 allFlags = map ('-':) $
1157 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1158 map ("fno-"++) flags ++
1159 map ("f"++) flags ++
1160 map ("X"++) supportedLanguages ++
1161 map ("XNo"++) supportedLanguages
1162 where ok (PrefixPred _ _) = False
1164 flags = [ name | (name, _, _) <- fFlags ]
1166 dynamic_flags :: [Flag DynP]
1168 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1169 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1170 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1171 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1172 , Flag "v" (OptIntSuffix setVerbosity) Supported
1174 ------- Specific phases --------------------------------------------
1175 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1176 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1177 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1178 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1179 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1180 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1181 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1182 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1183 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1184 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1186 , Flag "optL" (HasArg (upd . addOptL)) Supported
1187 , Flag "optP" (HasArg (upd . addOptP)) Supported
1188 , Flag "optF" (HasArg (upd . addOptF)) Supported
1189 , Flag "optc" (HasArg (upd . addOptc)) Supported
1190 , Flag "optm" (HasArg (upd . addOptm)) Supported
1191 , Flag "opta" (HasArg (upd . addOpta)) Supported
1192 , Flag "optl" (HasArg (upd . addOptl)) Supported
1193 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1196 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1199 -------- ghc -M -----------------------------------------------------
1200 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1201 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1202 (Deprecated "Use -dep-suffix instead")
1203 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1204 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1205 (Deprecated "Use -dep-makefile instead")
1206 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1207 (Deprecated "-optdep-w doesn't do anything")
1208 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1209 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1210 (Deprecated "Use -include-pkg-deps instead")
1211 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1212 (Deprecated "Use -include-pkg-deps instead")
1213 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1214 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1215 (Deprecated "Use -exclude-module instead")
1216 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1217 (Deprecated "Use -exclude-module instead")
1219 -------- Linking ----------------------------------------------------
1220 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1222 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1223 (Deprecated "Use -c instead")
1224 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1226 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1229 ------- Libraries ---------------------------------------------------
1230 , Flag "L" (Prefix addLibraryPath ) Supported
1231 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1233 ------- Frameworks --------------------------------------------------
1234 -- -framework-path should really be -F ...
1235 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1236 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1238 ------- Output Redirection ------------------------------------------
1239 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1240 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1241 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1242 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1243 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1244 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1245 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1246 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1247 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1248 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1249 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1252 ------- Keeping temporary files -------------------------------------
1253 -- These can be singular (think ghc -c) or plural (think ghc --make)
1254 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1255 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1256 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1257 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1258 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1259 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1260 -- This only makes sense as plural
1261 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1263 ------- Miscellaneous ----------------------------------------------
1264 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1265 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1266 , Flag "main-is" (SepArg setMainIs ) Supported
1267 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1268 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1269 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1271 ------- recompilation checker --------------------------------------
1272 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1273 (Deprecated "Use -fno-force-recomp instead")
1274 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1275 (Deprecated "Use -fforce-recomp instead")
1277 ------ HsCpp opts ---------------------------------------------------
1278 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1279 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1281 ------- Include/Import Paths ----------------------------------------
1282 , Flag "I" (Prefix addIncludePath) Supported
1283 , Flag "i" (OptPrefix addImportPath ) Supported
1285 ------ Debugging ----------------------------------------------------
1286 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1288 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1290 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1292 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1294 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1296 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1298 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1300 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1302 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1304 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1306 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1308 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1310 , Flag "ddump-asm-regalloc-stages"
1311 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1313 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1315 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1317 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1319 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1321 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1323 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1325 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1327 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1329 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1331 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1333 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1335 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1337 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1339 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1341 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1343 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1345 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1347 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1349 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1351 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1353 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1355 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1357 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1359 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1361 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1363 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1365 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1367 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1369 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1371 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1373 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1375 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1377 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1379 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1381 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1383 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1385 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1387 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1389 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1391 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1393 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1395 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1397 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1400 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1402 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1404 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1406 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1408 , Flag "dshow-passes"
1409 (NoArg (do forceRecompile
1410 setVerbosity (Just 2)))
1412 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1415 ------ Machine dependant (-m<blah>) stuff ---------------------------
1417 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1419 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1421 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1424 ------ Warning opts -------------------------------------------------
1425 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1427 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1429 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1431 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1433 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1434 (Deprecated "Use -w instead")
1435 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1438 ------ Optimisation flags ------------------------------------------
1439 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1440 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1441 (Deprecated "Use -O0 instead")
1442 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1443 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1445 -- If the number is missing, use 1
1447 , Flag "fsimplifier-phases"
1448 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1450 , Flag "fmax-simplifier-iterations"
1451 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1454 , Flag "fspec-constr-threshold"
1455 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1457 , Flag "fno-spec-constr-threshold"
1458 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1460 , Flag "fspec-constr-count"
1461 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1463 , Flag "fno-spec-constr-count"
1464 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1466 , Flag "fliberate-case-threshold"
1467 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1469 , Flag "fno-liberate-case-threshold"
1470 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1473 , Flag "frule-check"
1474 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1476 , Flag "fcontext-stack"
1477 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1480 ------ DPH flags ----------------------------------------------------
1483 (NoArg (setDPHBackend DPHSeq))
1486 (NoArg (setDPHBackend DPHPar))
1489 (NoArg (setDPHBackend DPHThis))
1492 ------ Compiler flags -----------------------------------------------
1494 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1495 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1496 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1498 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1499 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1500 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1502 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1504 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1507 ++ map (mkFlag True "f" setDynFlag ) fFlags
1508 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1509 ++ map (mkFlag True "X" setDynFlag ) xFlags
1510 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1512 package_flags :: [Flag DynP]
1514 ------- Packages ----------------------------------------------------
1515 Flag "package-conf" (HasArg extraPkgConf_) Supported
1516 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1518 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1519 , Flag "package" (HasArg exposePackage) Supported
1520 , Flag "hide-package" (HasArg hidePackage) Supported
1521 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1523 , Flag "ignore-package" (HasArg ignorePackage)
1525 , Flag "syslib" (HasArg exposePackage)
1526 (Deprecated "Use -package instead")
1529 mkFlag :: Bool -- ^ True <=> it should be turned on
1530 -> String -- ^ The flag prefix
1531 -> (DynFlag -> DynP ())
1532 -> (String, DynFlag, Bool -> Deprecated)
1534 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1535 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1537 deprecatedForLanguage :: String -> Bool -> Deprecated
1538 deprecatedForLanguage lang turn_on
1539 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1541 flag | turn_on = lang
1542 | otherwise = "No"++lang
1544 useInstead :: String -> Bool -> Deprecated
1545 useInstead flag turn_on
1546 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1548 no = if turn_on then "" else "no-"
1550 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1551 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1553 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1554 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1555 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1556 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1557 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1558 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1559 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1560 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1561 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1562 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1563 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1564 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1565 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1566 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1567 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1568 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1569 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1570 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1571 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1572 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1573 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1574 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1575 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1576 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1577 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1578 ( "strictness", Opt_Strictness, const Supported ),
1579 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1580 ( "full-laziness", Opt_FullLaziness, const Supported ),
1581 ( "liberate-case", Opt_LiberateCase, const Supported ),
1582 ( "spec-constr", Opt_SpecConstr, const Supported ),
1583 ( "cse", Opt_CSE, const Supported ),
1584 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1585 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1586 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1587 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1588 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1589 ( "case-merge", Opt_CaseMerge, const Supported ),
1590 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1591 ( "method-sharing", Opt_MethodSharing, const Supported ),
1592 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1593 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1594 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1595 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1596 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1597 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1598 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1599 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1600 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1601 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1602 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1603 ( "break-on-error", Opt_BreakOnError, const Supported ),
1604 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1605 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1606 ( "run-cps", Opt_RunCPS, const Supported ),
1607 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1608 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1609 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1610 ( "vectorise", Opt_Vectorise, const Supported ),
1611 ( "regs-graph", Opt_RegsGraph, const Supported ),
1612 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1613 ( "th", Opt_TemplateHaskell,
1614 deprecatedForLanguage "TemplateHaskell" ),
1615 ( "fi", Opt_ForeignFunctionInterface,
1616 deprecatedForLanguage "ForeignFunctionInterface" ),
1617 ( "ffi", Opt_ForeignFunctionInterface,
1618 deprecatedForLanguage "ForeignFunctionInterface" ),
1619 ( "arrows", Opt_Arrows,
1620 deprecatedForLanguage "Arrows" ),
1621 ( "generics", Opt_Generics,
1622 deprecatedForLanguage "Generics" ),
1623 ( "implicit-prelude", Opt_ImplicitPrelude,
1624 deprecatedForLanguage "ImplicitPrelude" ),
1625 ( "bang-patterns", Opt_BangPatterns,
1626 deprecatedForLanguage "BangPatterns" ),
1627 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1628 deprecatedForLanguage "MonomorphismRestriction" ),
1629 ( "mono-pat-binds", Opt_MonoPatBinds,
1630 deprecatedForLanguage "MonoPatBinds" ),
1631 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1632 deprecatedForLanguage "ExtendedDefaultRules" ),
1633 ( "implicit-params", Opt_ImplicitParams,
1634 deprecatedForLanguage "ImplicitParams" ),
1635 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1636 deprecatedForLanguage "ScopedTypeVariables" ),
1638 deprecatedForLanguage "PArr" ),
1639 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1640 deprecatedForLanguage "OverlappingInstances" ),
1641 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1642 deprecatedForLanguage "UndecidableInstances" ),
1643 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1644 deprecatedForLanguage "IncoherentInstances" ),
1645 ( "gen-manifest", Opt_GenManifest, const Supported ),
1646 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1647 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1650 supportedLanguages :: [String]
1651 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1653 -- This may contain duplicates
1654 languageOptions :: [DynFlag]
1655 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1657 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1658 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1660 ( "CPP", Opt_Cpp, const Supported ),
1661 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1662 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1663 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1664 ( "MagicHash", Opt_MagicHash, const Supported ),
1665 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1666 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1667 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1668 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1669 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1670 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1671 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1672 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1673 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1674 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1675 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1676 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1677 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1678 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1679 ( "Arrows", Opt_Arrows, const Supported ),
1680 ( "PArr", Opt_PArr, const Supported ),
1681 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1682 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1683 ( "Generics", Opt_Generics, const Supported ),
1685 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1686 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1687 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1688 ( "RecordPuns", Opt_RecordPuns,
1689 deprecatedForLanguage "NamedFieldPuns" ),
1690 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1691 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1692 ( "GADTs", Opt_GADTs, const Supported ),
1693 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1694 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1695 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1697 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1698 -- On by default (which is not strictly H98):
1699 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1700 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1701 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1702 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1703 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1705 ( "PatternSignatures", Opt_ScopedTypeVariables,
1706 deprecatedForLanguage "ScopedTypeVariables" ),
1708 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1709 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1710 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1711 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1712 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1713 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1714 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1715 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1716 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1717 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1718 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1719 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1720 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1721 ( "PackageImports", Opt_PackageImports, const Supported ),
1722 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1725 impliedFlags :: [(DynFlag, DynFlag)]
1727 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1728 -- be completely rigid for GADTs
1730 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1731 -- Note [Scoped tyvars] in TcBinds
1734 glasgowExtsFlags :: [DynFlag]
1735 glasgowExtsFlags = [
1736 Opt_PrintExplicitForalls
1737 , Opt_ForeignFunctionInterface
1738 , Opt_UnliftedFFITypes
1740 , Opt_ImplicitParams
1741 , Opt_ScopedTypeVariables
1743 , Opt_TypeSynonymInstances
1744 , Opt_StandaloneDeriving
1745 , Opt_DeriveDataTypeable
1746 , Opt_FlexibleContexts
1747 , Opt_FlexibleInstances
1748 , Opt_ConstrainedClassMethods
1749 , Opt_MultiParamTypeClasses
1750 , Opt_FunctionalDependencies
1752 , Opt_PolymorphicComponents
1753 , Opt_ExistentialQuantification
1755 , Opt_PostfixOperators
1757 , Opt_LiberalTypeSynonyms
1759 , Opt_ImpredicativeTypes
1762 , Opt_ParallelListComp
1763 , Opt_EmptyDataDecls
1764 , Opt_KindSignatures
1765 , Opt_GeneralizedNewtypeDeriving
1766 , Opt_TypeFamilies ]
1768 -- -----------------------------------------------------------------------------
1769 -- Parsing the dynamic flags.
1771 -- | Parse dynamic flags from a list of command line arguments. Returns the
1772 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1773 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1774 -- flags or missing arguments).
1775 parseDynamicFlags :: Monad m =>
1776 DynFlags -> [Located String]
1777 -> m (DynFlags, [Located String], [Located String])
1778 -- ^ Updated 'DynFlags', left-over arguments, and
1779 -- list of warnings.
1780 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1782 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1783 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1784 parseDynamicNoPackageFlags :: Monad m =>
1785 DynFlags -> [Located String]
1786 -> m (DynFlags, [Located String], [Located String])
1787 -- ^ Updated 'DynFlags', left-over arguments, and
1788 -- list of warnings.
1789 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1791 parseDynamicFlags_ :: Monad m =>
1792 DynFlags -> [Located String] -> Bool
1793 -> m (DynFlags, [Located String], [Located String])
1794 parseDynamicFlags_ dflags args pkg_flags = do
1795 -- XXX Legacy support code
1796 -- We used to accept things like
1797 -- optdep-f -optdepdepend
1798 -- optdep-f -optdep depend
1799 -- optdep -f -optdepdepend
1800 -- optdep -f -optdep depend
1801 -- but the spaces trip up proper argument handling. So get rid of them.
1802 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1803 f (x : xs) = x : f xs
1807 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1808 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1809 | otherwise = dynamic_flags
1811 let ((leftover, errs, warns), dflags')
1812 = runCmdLine (processArgs flag_spec args') dflags
1813 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1814 return (dflags', leftover, warns)
1816 type DynP = CmdLineP DynFlags
1818 upd :: (DynFlags -> DynFlags) -> DynP ()
1820 dfs <- getCmdLineState
1821 putCmdLineState $! (f dfs)
1823 --------------------------
1824 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1825 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1826 ; mapM_ setDynFlag deps }
1828 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1829 -- When you set f, set the ones it implies
1830 -- NB: use setDynFlag recursively, in case the implied flags
1831 -- implies further flags
1832 -- When you un-set f, however, we don't un-set the things it implies
1833 -- (except for -fno-glasgow-exts, which is treated specially)
1835 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1837 --------------------------
1838 setDumpFlag :: DynFlag -> OptKind DynP
1839 setDumpFlag dump_flag
1840 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1842 -- Certain dumpy-things are really interested in what's going
1843 -- on during recompilation checking, so in those cases we
1844 -- don't want to turn it off.
1845 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1846 Opt_D_dump_hi_diffs]
1848 forceRecompile :: DynP ()
1849 -- Whenver we -ddump, force recompilation (by switching off the
1850 -- recompilation checker), else you don't see the dump! However,
1851 -- don't switch it off in --make mode, else *everything* gets
1852 -- recompiled which probably isn't what you want
1853 forceRecompile = do { dfs <- getCmdLineState
1854 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1856 force_recomp dfs = isOneShot (ghcMode dfs)
1858 setVerboseCore2Core :: DynP ()
1859 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1861 upd (\s -> s { shouldDumpSimplPhase = const True })
1863 setDumpSimplPhases :: String -> DynP ()
1864 setDumpSimplPhases s = do forceRecompile
1865 upd (\s -> s { shouldDumpSimplPhase = spec })
1867 spec :: SimplifierMode -> Bool
1869 . map (join (&&) . map match . split ':')
1875 join :: (Bool -> Bool -> Bool)
1876 -> [SimplifierMode -> Bool]
1877 -> SimplifierMode -> Bool
1878 join _ [] = const True
1879 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1881 match :: String -> SimplifierMode -> Bool
1882 match "" = const True
1883 match s = case reads s of
1884 [(n,"")] -> phase_num n
1887 phase_num :: Int -> SimplifierMode -> Bool
1888 phase_num n (SimplPhase k _) = n == k
1889 phase_num _ _ = False
1891 phase_name :: String -> SimplifierMode -> Bool
1892 phase_name s SimplGently = s == "gentle"
1893 phase_name s (SimplPhase _ ss) = s `elem` ss
1895 setVerbosity :: Maybe Int -> DynP ()
1896 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1898 addCmdlineHCInclude :: String -> DynP ()
1899 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1901 extraPkgConf_ :: FilePath -> DynP ()
1902 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1904 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1906 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1908 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1910 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1912 setPackageName :: String -> DynFlags -> DynFlags
1914 | Nothing <- unpackPackageId pid
1915 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1917 = \s -> s{ thisPackage = pid }
1919 pid = stringToPackageId p
1921 -- If we're linking a binary, then only targets that produce object
1922 -- code are allowed (requests for other target types are ignored).
1923 setTarget :: HscTarget -> DynP ()
1924 setTarget l = upd set
1927 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1930 -- Changes the target only if we're compiling object code. This is
1931 -- used by -fasm and -fvia-C, which switch from one to the other, but
1932 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1933 -- can be safely used in an OPTIONS_GHC pragma.
1934 setObjTarget :: HscTarget -> DynP ()
1935 setObjTarget l = upd set
1938 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1941 setOptLevel :: Int -> DynFlags -> DynFlags
1942 setOptLevel n dflags
1943 | hscTarget dflags == HscInterpreted && n > 0
1945 -- not in IO any more, oh well:
1946 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1948 = updOptLevel n dflags
1951 -- -Odph is equivalent to
1953 -- -O2 optimise as much as possible
1954 -- -fno-method-sharing sharing specialisation defeats fusion
1956 -- -fdicts-cheap always inline dictionaries
1957 -- -fmax-simplifier-iterations20 this is necessary sometimes
1958 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1959 -- -fno-spec-constr-count SpecConstr as much as possible
1960 -- -finline-enough-args hack to prevent excessive inlining
1962 setDPHOpt :: DynFlags -> DynFlags
1963 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1964 , specConstrThreshold = Nothing
1965 , specConstrCount = Nothing
1967 `dopt_set` Opt_DictsCheap
1968 `dopt_unset` Opt_MethodSharing
1969 `dopt_set` Opt_InlineIfEnoughArgs
1971 data DPHBackend = DPHPar
1974 deriving(Eq, Ord, Enum, Show)
1976 setDPHBackend :: DPHBackend -> DynP ()
1977 setDPHBackend backend
1979 upd $ \dflags -> dflags { dphBackend = backend }
1980 mapM_ exposePackage (dph_packages backend)
1982 dph_packages DPHThis = []
1983 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1984 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1986 dphPackage :: DynFlags -> PackageId
1987 dphPackage dflags = case dphBackend dflags of
1988 DPHPar -> dphParPackageId
1989 DPHSeq -> dphSeqPackageId
1990 DPHThis -> thisPackage dflags
1992 setMainIs :: String -> DynP ()
1994 | not (null main_fn) && isLower (head main_fn)
1995 -- The arg looked like "Foo.Bar.baz"
1996 = upd $ \d -> d{ mainFunIs = Just main_fn,
1997 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1999 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2000 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2002 | otherwise -- The arg looked like "baz"
2003 = upd $ \d -> d{ mainFunIs = Just arg }
2005 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2007 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
2008 -- Either returns the default name or the one configured on the command line with -main-is
2009 getMainFun :: DynFlags -> RdrName
2010 getMainFun dflags = case (mainFunIs dflags) of
2011 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
2012 Nothing -> main_RDR_Unqual
2014 -----------------------------------------------------------------------------
2015 -- Paths & Libraries
2017 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2019 -- -i on its own deletes the import paths
2020 addImportPath "" = upd (\s -> s{importPaths = []})
2021 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2025 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2028 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2030 addFrameworkPath p =
2031 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2033 #ifndef mingw32_TARGET_OS
2034 split_marker :: Char
2035 split_marker = ':' -- not configurable (ToDo)
2038 splitPathList :: String -> [String]
2039 splitPathList s = filter notNull (splitUp s)
2040 -- empty paths are ignored: there might be a trailing
2041 -- ':' in the initial list, for example. Empty paths can
2042 -- cause confusion when they are translated into -I options
2043 -- for passing to gcc.
2045 #ifndef mingw32_TARGET_OS
2046 splitUp xs = split split_marker xs
2048 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2050 -- That is, if "foo:bar:baz" is used, this interpreted as
2051 -- consisting of three entries, 'foo', 'bar', 'baz'.
2052 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2053 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2055 -- Notice that no attempt is made to fully replace the 'standard'
2056 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2057 -- that this will cause too much breakage for users & ':' will
2058 -- work fine even with DOS paths, if you're not insisting on being silly.
2061 splitUp (x:':':div:xs) | div `elem` dir_markers
2062 = ((x:':':div:p): splitUp rs)
2064 (p,rs) = findNextPath xs
2065 -- we used to check for existence of the path here, but that
2066 -- required the IO monad to be threaded through the command-line
2067 -- parser which is quite inconvenient. The
2068 splitUp xs = cons p (splitUp rs)
2070 (p,rs) = findNextPath xs
2075 -- will be called either when we've consumed nought or the
2076 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2077 -- finding the next split marker.
2079 case break (`elem` split_markers) xs of
2080 (p, _:ds) -> (p, ds)
2083 split_markers :: [Char]
2084 split_markers = [':', ';']
2086 dir_markers :: [Char]
2087 dir_markers = ['/', '\\']
2090 -- -----------------------------------------------------------------------------
2091 -- tmpDir, where we store temporary files.
2093 setTmpDir :: FilePath -> DynFlags -> DynFlags
2094 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2095 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2096 -- seem necessary now --SDM 7/2/2008
2098 -----------------------------------------------------------------------------
2101 setOptHpcDir :: String -> DynP ()
2102 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2104 -----------------------------------------------------------------------------
2105 -- Via-C compilation stuff
2107 -- There are some options that we need to pass to gcc when compiling
2108 -- Haskell code via C, but are only supported by recent versions of
2109 -- gcc. The configure script decides which of these options we need,
2110 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2111 -- read before each via-C compilation. The advantage of having these
2112 -- in a separate file is that the file can be created at install-time
2113 -- depending on the available gcc version, and even re-generated later
2114 -- if gcc is upgraded.
2116 -- The options below are not dependent on the version of gcc, only the
2119 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2120 [String]) -- for registerised HC compilations
2121 machdepCCOpts _dflags
2122 #if alpha_TARGET_ARCH
2124 #ifdef HAVE_THREADED_RTS_SUPPORT
2128 -- For now, to suppress the gcc warning "call-clobbered
2129 -- register used for global register variable", we simply
2130 -- disable all warnings altogether using the -w flag. Oh well.
2132 #elif hppa_TARGET_ARCH
2133 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2134 -- (very nice, but too bad the HP /usr/include files don't agree.)
2135 = ( ["-D_HPUX_SOURCE"], [] )
2137 #elif m68k_TARGET_ARCH
2138 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2139 -- popping of args to routines to be explicit; if we let things
2140 -- be deferred 'til after an STGJUMP, imminent death is certain!
2142 -- -fomit-frame-pointer : *don't*
2143 -- It's better to have a6 completely tied up being a frame pointer
2144 -- rather than let GCC pick random things to do with it.
2145 -- (If we want to steal a6, then we would try to do things
2146 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2147 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2149 #elif i386_TARGET_ARCH
2150 -- -fno-defer-pop : basically the same game as for m68k
2152 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2153 -- the fp (%ebp) for our register maps.
2154 = let n_regs = stolen_x86_regs _dflags
2157 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2160 "-fomit-frame-pointer",
2161 -- we want -fno-builtin, because when gcc inlines
2162 -- built-in functions like memcpy() it tends to
2163 -- run out of registers, requiring -monly-n-regs
2165 "-DSTOLEN_X86_REGS="++show n_regs ]
2168 #elif ia64_TARGET_ARCH
2169 = ( [], ["-fomit-frame-pointer", "-G0"] )
2171 #elif x86_64_TARGET_ARCH
2172 = ( [], ["-fomit-frame-pointer",
2173 "-fno-asynchronous-unwind-tables",
2174 -- the unwind tables are unnecessary for HC code,
2175 -- and get in the way of -split-objs. Another option
2176 -- would be to throw them away in the mangler, but this
2179 -- calling builtins like strlen() using the FFI can
2180 -- cause gcc to run out of regs, so use the external
2184 #elif sparc_TARGET_ARCH
2186 -- For now, to suppress the gcc warning "call-clobbered
2187 -- register used for global register variable", we simply
2188 -- disable all warnings altogether using the -w flag. Oh well.
2190 #elif powerpc_apple_darwin_TARGET
2192 -- Disable Apple's precompiling preprocessor. It's a great thing
2193 -- for "normal" programs, but it doesn't support register variable
2195 = ( [], ["-no-cpp-precomp"] )
2200 picCCOpts :: DynFlags -> [String]
2202 #if darwin_TARGET_OS
2203 -- Apple prefers to do things the other way round.
2204 -- PIC is on by default.
2205 -- -mdynamic-no-pic:
2206 -- Turn off PIC code generation.
2208 -- Don't generate "common" symbols - these are unwanted
2209 -- in dynamic libraries.
2212 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2214 = ["-mdynamic-no-pic"]
2215 #elif mingw32_TARGET_OS
2216 -- no -fPIC for Windows
2218 = ["-U __PIC__","-D__PIC__"]
2223 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2228 -- -----------------------------------------------------------------------------
2232 can_split = cSplitObjs == "YES"
2234 -- -----------------------------------------------------------------------------
2237 compilerInfo :: [(String, String)]
2238 compilerInfo = [("Project name", cProjectName),
2239 ("Project version", cProjectVersion),
2240 ("Booter version", cBooterVersion),
2242 ("Interface file version", cHscIfaceFileVersion),
2243 ("Have interpreter", cGhcWithInterpreter),
2244 ("Object splitting", cSplitObjs),
2245 ("Have native code generator", cGhcWithNativeCodeGen),
2246 ("Support SMP", cGhcWithSMP),
2247 ("Unregisterised", cGhcUnregisterised),
2248 ("Tables next to code", cGhcEnableTablesNextToCode),
2249 ("Win32 DLLs", cEnableWin32DLLs),
2250 ("RTS ways", cGhcRTSWays),
2251 ("Leading underscore", cLeadingUnderscore),
2252 ("Debug on", show debugIsOn)