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
43 supportedLanguages, languageOptions,
45 -- ** DynFlag C compiler options
46 machdepCCOpts, picCCOpts,
48 -- * Configuration of the core-to-core passes
55 -- * Configuration of the stg-to-stg passes
59 -- * Compiler configuration suitable for display to the user
63 #include "HsVersions.h"
67 import PrelNames ( mAIN, main_RDR_Unqual )
68 import RdrName ( RdrName, mkRdrUnqual )
69 import OccName ( mkVarOccFS )
70 #ifdef i386_TARGET_ARCH
71 import StaticFlags ( opt_Static )
73 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
75 import {-# SOURCE #-} Packages (PackageState)
76 import DriverPhases ( Phase(..), phaseInputExt )
79 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
81 import UniqFM ( UniqFM )
83 import Maybes ( orElse )
87 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
89 import Data.IORef ( readIORef )
90 import Control.Monad ( when )
93 import System.FilePath
94 import System.IO ( stderr, hPutChar )
96 -- -----------------------------------------------------------------------------
99 -- | Enumerates the simple on-or-off dynamic flags
105 | Opt_D_dump_cmmz_pretty
109 | Opt_D_dump_asm_native
110 | Opt_D_dump_asm_liveness
111 | Opt_D_dump_asm_coalesce
112 | Opt_D_dump_asm_regalloc
113 | Opt_D_dump_asm_regalloc_stages
114 | Opt_D_dump_asm_conflicts
115 | Opt_D_dump_asm_stats
121 | Opt_D_dump_inlinings
122 | Opt_D_dump_rule_firings
123 | Opt_D_dump_occur_anal
127 | Opt_D_dump_simpl_iterations
128 | Opt_D_dump_simpl_phases
137 | Opt_D_dump_worker_wrapper
138 | Opt_D_dump_rn_trace
139 | Opt_D_dump_rn_stats
141 | Opt_D_dump_simpl_stats
142 | Opt_D_dump_tc_trace
143 | Opt_D_dump_if_trace
150 | Opt_D_verbose_core2core
151 | Opt_D_verbose_stg2stg
153 | Opt_D_dump_hi_diffs
154 | Opt_D_dump_minimal_imports
155 | Opt_D_dump_mod_cycles
156 | Opt_D_dump_view_pattern_commoning
157 | Opt_D_faststring_stats
158 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
159 | Opt_D_no_debug_output
165 | Opt_WarnIsError -- -Werror; makes warnings fatal
166 | Opt_WarnDuplicateExports
168 | Opt_WarnImplicitPrelude
169 | Opt_WarnIncompletePatterns
170 | Opt_WarnIncompletePatternsRecUpd
171 | Opt_WarnMissingFields
172 | Opt_WarnMissingMethods
173 | Opt_WarnMissingSigs
174 | Opt_WarnNameShadowing
175 | Opt_WarnOverlappingPatterns
176 | Opt_WarnSimplePatterns
177 | Opt_WarnTypeDefaults
178 | Opt_WarnMonomorphism
179 | Opt_WarnUnusedBinds
180 | Opt_WarnUnusedImports
181 | Opt_WarnUnusedMatches
182 | Opt_WarnWarningsDeprecations
183 | Opt_WarnDeprecatedFlags
184 | Opt_WarnDodgyImports
187 | Opt_WarnUnrecognisedPragmas
188 | Opt_WarnDodgyForeignImports
191 | Opt_OverlappingInstances
192 | Opt_UndecidableInstances
193 | Opt_IncoherentInstances
194 | Opt_MonomorphismRestriction
196 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
197 | Opt_ForeignFunctionInterface
198 | Opt_UnliftedFFITypes
199 | Opt_PArr -- Syntactic support for parallel arrays
200 | Opt_Arrows -- Arrow-notation syntax
201 | Opt_TemplateHaskell
204 | Opt_Generics -- "Derivable type classes"
205 | Opt_ImplicitPrelude
206 | Opt_ScopedTypeVariables
210 | Opt_OverloadedStrings
211 | Opt_DisambiguateRecordFields
212 | Opt_RecordWildCards
217 | Opt_StandaloneDeriving
218 | Opt_DeriveDataTypeable
219 | Opt_TypeSynonymInstances
220 | Opt_FlexibleContexts
221 | Opt_FlexibleInstances
222 | Opt_ConstrainedClassMethods
223 | Opt_MultiParamTypeClasses
224 | Opt_FunctionalDependencies
226 | Opt_PolymorphicComponents
227 | Opt_ExistentialQuantification
231 | Opt_ParallelListComp
232 | Opt_TransformListComp
233 | Opt_GeneralizedNewtypeDeriving
235 | Opt_PostfixOperators
237 | Opt_LiberalTypeSynonyms
240 | Opt_ImpredicativeTypes
244 | Opt_PrintExplicitForalls
249 | Opt_StaticArgumentTransformation
253 | Opt_IgnoreInterfacePragmas
254 | Opt_OmitInterfacePragmas
255 | Opt_DoLambdaEtaExpansion
259 | Opt_UnboxStrictFields
262 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
264 | Opt_RegsGraph -- do graph coloring register allocation
265 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
273 | Opt_ExcessPrecision
274 | Opt_ReadUserPackageConf
278 | Opt_HideAllPackages
279 | Opt_PrintBindResult
283 | Opt_BreakOnException
285 | Opt_PrintEvldWithShow
286 | Opt_PrintBindContents
290 | Opt_ConvertToZipCfgAndBack
291 | Opt_AutoLinkPackages
292 | Opt_ImplicitImportQualified
300 | Opt_KeepRawTokenStream
304 -- | Contains not only a collection of 'DynFlag's but also a plethora of
305 -- information relating to the compilation of a single file or GHC session
306 data DynFlags = DynFlags {
309 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
310 stgToDo :: Maybe [StgToDo], -- similarly
311 hscTarget :: HscTarget,
312 hscOutName :: String, -- ^ Name of the output file
313 extCoreName :: String, -- ^ Name of the .hcr output file
314 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
315 optLevel :: Int, -- ^ Optimisation level
316 simplPhases :: Int, -- ^ Number of simplifier phases
317 maxSimplIterations :: Int, -- ^ Max simplifier iterations
318 shouldDumpSimplPhase :: SimplifierMode -> Bool,
319 ruleCheck :: Maybe String,
321 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
322 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
323 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
325 stolen_x86_regs :: Int,
326 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
327 importPaths :: [FilePath],
329 mainFunIs :: Maybe String,
330 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
332 dphBackend :: DPHBackend,
334 thisPackage :: PackageId, -- ^ name of package currently being compiled
337 wayNames :: [WayName], -- ^ Way flags from the command line
338 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
339 rtsBuildTag :: String, -- ^ The RTS \"way\"
342 objectDir :: Maybe String,
343 hiDir :: Maybe String,
344 stubDir :: Maybe String,
350 outputFile :: Maybe String,
351 outputHi :: Maybe String,
352 dynLibLoader :: DynLibLoader,
354 -- | This is set by 'DriverPipeline.runPipeline' based on where
355 -- its output is going.
356 dumpPrefix :: Maybe FilePath,
358 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
359 -- Set by @-ddump-file-prefix@
360 dumpPrefixForce :: Maybe FilePath,
362 includePaths :: [String],
363 libraryPaths :: [String],
364 frameworkPaths :: [String], -- used on darwin only
365 cmdlineFrameworks :: [String], -- ditto
366 tmpDir :: String, -- no trailing '/'
368 ghcUsagePath :: FilePath, -- Filled in by SysTools
369 ghciUsagePath :: FilePath, -- ditto
371 hpcDir :: String, -- ^ Path to store the .mix files
373 -- options for particular phases
381 opt_windres :: [String],
383 -- commands for particular phases
385 pgm_P :: (String,[Option]),
387 pgm_c :: (String,[Option]),
388 pgm_m :: (String,[Option]),
389 pgm_s :: (String,[Option]),
390 pgm_a :: (String,[Option]),
391 pgm_l :: (String,[Option]),
392 pgm_dll :: (String,[Option]),
394 pgm_sysman :: String,
395 pgm_windres :: String,
398 depMakefile :: FilePath,
399 depIncludePkgDeps :: Bool,
400 depExcludeMods :: [ModuleName],
401 depSuffixes :: [String],
405 extraPkgConfs :: [FilePath],
406 topDir :: FilePath, -- filled in by SysTools
407 systemPackageConfig :: FilePath, -- ditto
408 -- ^ The @-package-conf@ flags given on the command line, in the order
411 packageFlags :: [PackageFlag],
412 -- ^ The @-package@ and @-hide-package@ flags from the command-line
415 -- NB. do not modify this field, it is calculated by
416 -- Packages.initPackages and Packages.updatePackages.
417 pkgDatabase :: Maybe (UniqFM PackageConfig),
418 pkgState :: PackageState,
423 -- | Message output action: use "ErrUtils" instead of this if you can
424 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
426 haddockOptions :: Maybe String
437 -- | Will this target result in an object file on the disk?
438 isObjectTarget :: HscTarget -> Bool
439 isObjectTarget HscC = True
440 isObjectTarget HscAsm = True
441 isObjectTarget _ = False
443 -- | The 'GhcMode' tells us whether we're doing multi-module
444 -- compilation (controlled via the "GHC" API) or one-shot
445 -- (single-module) compilation. This makes a difference primarily to
446 -- the "Finder": in one-shot mode we look for interface files for
447 -- imported modules, but in multi-module mode we look for source files
448 -- in order to check whether they need to be recompiled.
450 = CompManager -- ^ @\-\-make@, GHCi, etc.
451 | OneShot -- ^ @ghc -c Foo.hs@
452 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
455 instance Outputable GhcMode where
456 ppr CompManager = ptext (sLit "CompManager")
457 ppr OneShot = ptext (sLit "OneShot")
458 ppr MkDepend = ptext (sLit "MkDepend")
460 isOneShot :: GhcMode -> Bool
461 isOneShot OneShot = True
462 isOneShot _other = False
464 -- | What to do in the link step, if there is one.
466 = NoLink -- ^ Don't link at all
467 | LinkBinary -- ^ Link object code into a binary
468 | LinkInMemory -- ^ Use the in-memory dynamic linker
469 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
472 isNoLink :: GhcLink -> Bool
473 isNoLink NoLink = True
477 = ExposePackage String
479 | IgnorePackage String
482 defaultHscTarget :: HscTarget
483 defaultHscTarget = defaultObjectTarget
485 -- | The 'HscTarget' value corresponding to the default way to create
486 -- object files on the current platform.
487 defaultObjectTarget :: HscTarget
489 | cGhcWithNativeCodeGen == "YES" = HscAsm
494 | Wrapped (Maybe String)
498 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
499 initDynFlags :: DynFlags -> IO DynFlags
500 initDynFlags dflags = do
501 -- someday these will be dynamic flags
502 ways <- readIORef v_Ways
503 build_tag <- readIORef v_Build_tag
504 rts_build_tag <- readIORef v_RTS_Build_tag
507 buildTag = build_tag,
508 rtsBuildTag = rts_build_tag
511 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
512 -- and must be fully initialized by 'GHC.newSession' first.
513 defaultDynFlags :: DynFlags
516 ghcMode = CompManager,
517 ghcLink = LinkBinary,
520 hscTarget = defaultHscTarget,
526 maxSimplIterations = 4,
527 shouldDumpSimplPhase = const False,
529 specConstrThreshold = Just 200,
530 specConstrCount = Just 3,
531 liberateCaseThreshold = Just 200,
533 cmdlineHcIncludes = [],
537 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
541 thisPackage = mainPackageId,
547 objectSuf = phaseInputExt StopLn,
548 hcSuf = phaseInputExt HCc,
551 outputFile = Nothing,
553 dynLibLoader = Deployable,
554 dumpPrefix = Nothing,
555 dumpPrefixForce = Nothing,
559 cmdlineFrameworks = [],
560 tmpDir = cDEFAULT_TMPDIR,
577 pkgDatabase = Nothing,
578 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
579 wayNames = panic "defaultDynFlags: No wayNames",
580 buildTag = panic "defaultDynFlags: No buildTag",
581 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
582 -- initSysTools fills all these in
583 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
584 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
585 topDir = panic "defaultDynFlags: No topDir",
586 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
587 pgm_L = panic "defaultDynFlags: No pgm_L",
588 pgm_P = panic "defaultDynFlags: No pgm_P",
589 pgm_F = panic "defaultDynFlags: No pgm_F",
590 pgm_c = panic "defaultDynFlags: No pgm_c",
591 pgm_m = panic "defaultDynFlags: No pgm_m",
592 pgm_s = panic "defaultDynFlags: No pgm_s",
593 pgm_a = panic "defaultDynFlags: No pgm_a",
594 pgm_l = panic "defaultDynFlags: No pgm_l",
595 pgm_dll = panic "defaultDynFlags: No pgm_dll",
596 pgm_T = panic "defaultDynFlags: No pgm_T",
597 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
598 pgm_windres = panic "defaultDynFlags: No pgm_windres",
599 -- end of initSysTools values
601 depMakefile = "Makefile",
602 depIncludePkgDeps = False,
606 -- end of ghc -M values
607 haddockOptions = Nothing,
609 Opt_AutoLinkPackages,
610 Opt_ReadUserPackageConf,
612 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
613 -- behaviour the default, to see if anyone notices
617 Opt_MonomorphismRestriction,
625 Opt_PrintBindContents
627 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
628 -- The default -O0 options
631 log_action = \severity srcSpan style msg ->
633 SevInfo -> printErrs (msg style)
634 SevFatal -> printErrs (msg style)
637 printErrs ((mkLocMessage srcSpan msg) style)
638 -- careful (#2302): printErrs prints in UTF-8, whereas
639 -- converting to string first and using hPutStr would
640 -- just emit the low 8 bits of each unicode char.
647 0 | print errors & warnings only
648 1 | minimal verbosity: print "compiling M ... done." for each module.
649 2 | equivalent to -dshow-passes
650 3 | equivalent to existing "ghc -v"
651 4 | "ghc -v -ddump-most"
652 5 | "ghc -v -ddump-all"
655 -- | Test whether a 'DynFlag' is set
656 dopt :: DynFlag -> DynFlags -> Bool
657 dopt f dflags = f `elem` (flags dflags)
660 dopt_set :: DynFlags -> DynFlag -> DynFlags
661 dopt_set dfs f = dfs{ flags = f : flags dfs }
663 -- | Unset a 'DynFlag'
664 dopt_unset :: DynFlags -> DynFlag -> DynFlags
665 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
667 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
668 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
669 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
670 -> [a] -- ^ Correctly ordered extracted options
671 getOpts dflags opts = reverse (opts dflags)
672 -- We add to the options from the front, so we need to reverse the list
674 -- | Gets the verbosity flag for the current verbosity level. This is fed to
675 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
676 getVerbFlag :: DynFlags -> String
678 | verbosity dflags >= 3 = "-v"
681 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
682 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
683 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
684 addCmdlineFramework, addHaddockOpts
685 :: String -> DynFlags -> DynFlags
686 setOutputFile, setOutputHi, setDumpPrefixForce
687 :: Maybe String -> DynFlags -> DynFlags
689 setObjectDir f d = d{ objectDir = Just f}
690 setHiDir f d = d{ hiDir = Just f}
691 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
692 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
693 -- \#included from the .hc file when compiling with -fvia-C.
695 setObjectSuf f d = d{ objectSuf = f}
696 setHiSuf f d = d{ hiSuf = f}
697 setHcSuf f d = d{ hcSuf = f}
699 setOutputFile f d = d{ outputFile = f}
700 setOutputHi f d = d{ outputHi = f}
702 parseDynLibLoaderMode f d =
704 ("deploy", "") -> d{ dynLibLoader = Deployable }
705 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
706 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
707 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
708 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
709 (_,_) -> error "Unknown dynlib loader"
711 setDumpPrefixForce f d = d { dumpPrefixForce = f}
713 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
714 -- Config.hs should really use Option.
715 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
717 setPgmL f d = d{ pgm_L = f}
718 setPgmF f d = d{ pgm_F = f}
719 setPgmc f d = d{ pgm_c = (f,[])}
720 setPgmm f d = d{ pgm_m = (f,[])}
721 setPgms f d = d{ pgm_s = (f,[])}
722 setPgma f d = d{ pgm_a = (f,[])}
723 setPgml f d = d{ pgm_l = (f,[])}
724 setPgmdll f d = d{ pgm_dll = (f,[])}
725 setPgmwindres f d = d{ pgm_windres = f}
727 addOptL f d = d{ opt_L = f : opt_L d}
728 addOptP f d = d{ opt_P = f : opt_P d}
729 addOptF f d = d{ opt_F = f : opt_F d}
730 addOptc f d = d{ opt_c = f : opt_c d}
731 addOptm f d = d{ opt_m = f : opt_m d}
732 addOpta f d = d{ opt_a = f : opt_a d}
733 addOptl f d = d{ opt_l = f : opt_l d}
734 addOptwindres f d = d{ opt_windres = f : opt_windres d}
736 setDepMakefile :: FilePath -> DynFlags -> DynFlags
737 setDepMakefile f d = d { depMakefile = deOptDep f }
739 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
740 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
742 addDepExcludeMod :: String -> DynFlags -> DynFlags
744 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
746 addDepSuffix :: FilePath -> DynFlags -> DynFlags
747 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
749 setDepWarnings :: Bool -> DynFlags -> DynFlags
750 setDepWarnings b d = d { depWarnings = b }
753 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
754 -- we need to strip the "-optdep" off of the arg
755 deOptDep :: String -> String
756 deOptDep x = case maybePrefixMatch "-optdep" x of
760 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
762 addHaddockOpts f d = d{ haddockOptions = Just f}
764 -- -----------------------------------------------------------------------------
765 -- Command-line options
767 -- | When invoking external tools as part of the compilation pipeline, we
768 -- pass these a sequence of options on the command-line. Rather than
769 -- just using a list of Strings, we use a type that allows us to distinguish
770 -- between filepaths and 'other stuff'. The reason for this is that
771 -- this type gives us a handle on transforming filenames, and filenames only,
772 -- to whatever format they're expected to be on a particular platform.
774 = FileOption -- an entry that _contains_ filename(s) / filepaths.
775 String -- a non-filepath prefix that shouldn't be
776 -- transformed (e.g., "/out=")
777 String -- the filepath/filename portion
780 -----------------------------------------------------------------------------
781 -- Setting the optimisation level
783 updOptLevel :: Int -> DynFlags -> DynFlags
784 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
786 = dfs2{ optLevel = final_n }
788 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
789 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
790 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
792 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
793 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
795 optLevelFlags :: [([Int], DynFlag)]
797 = [ ([0], Opt_IgnoreInterfacePragmas)
798 , ([0], Opt_OmitInterfacePragmas)
800 , ([1,2], Opt_IgnoreAsserts)
801 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
803 , ([1,2], Opt_DoEtaReduction)
804 , ([1,2], Opt_CaseMerge)
805 , ([1,2], Opt_Strictness)
807 , ([1,2], Opt_FullLaziness)
809 , ([2], Opt_LiberateCase)
810 , ([2], Opt_SpecConstr)
812 -- , ([2], Opt_StaticArgumentTransformation)
813 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
814 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
815 -- several improvements to the heuristics, and I'm concerned that without
816 -- those changes SAT will interfere with some attempts to write "high
817 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
818 -- this year. In particular, the version in HEAD lacks the tail call
819 -- criterion, so many things that look like reasonable loops will be
820 -- turned into functions with extra (unneccesary) thunk creation.
822 , ([0,1,2], Opt_DoLambdaEtaExpansion)
823 -- This one is important for a tiresome reason:
824 -- we want to make sure that the bindings for data
825 -- constructors are eta-expanded. This is probably
826 -- a good thing anyway, but it seems fragile.
829 -- -----------------------------------------------------------------------------
830 -- Standard sets of warning options
832 standardWarnings :: [DynFlag]
834 = [ Opt_WarnWarningsDeprecations,
835 Opt_WarnDeprecatedFlags,
836 Opt_WarnUnrecognisedPragmas,
837 Opt_WarnOverlappingPatterns,
838 Opt_WarnMissingFields,
839 Opt_WarnMissingMethods,
840 Opt_WarnDuplicateExports,
841 Opt_WarnDodgyForeignImports
844 minusWOpts :: [DynFlag]
846 = standardWarnings ++
847 [ Opt_WarnUnusedBinds,
848 Opt_WarnUnusedMatches,
849 Opt_WarnUnusedImports,
850 Opt_WarnIncompletePatterns,
854 minusWallOpts :: [DynFlag]
857 [ Opt_WarnTypeDefaults,
858 Opt_WarnNameShadowing,
864 -- minuswRemovesOpts should be every warning option
865 minuswRemovesOpts :: [DynFlag]
868 [Opt_WarnImplicitPrelude,
869 Opt_WarnIncompletePatternsRecUpd,
870 Opt_WarnSimplePatterns,
871 Opt_WarnMonomorphism,
872 Opt_WarnUnrecognisedPragmas,
876 -- -----------------------------------------------------------------------------
877 -- CoreToDo: abstraction of core-to-core passes to run.
879 data CoreToDo -- These are diff core-to-core passes,
880 -- which may be invoked in any order,
881 -- as many times as you like.
883 = CoreDoSimplify -- The core-to-core simplifier.
886 -- Each run of the simplifier can take a different
887 -- set of simplifier-specific flags.
889 | CoreDoFloatOutwards FloatOutSwitches
894 | CoreDoWorkerWrapper
897 | CoreDoOldStrictness
900 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
901 -- matching this string
902 | CoreDoVectorisation PackageId
903 | CoreDoNothing -- Useful when building up
904 | CoreDoPasses [CoreToDo] -- lists of these things
906 data SimplifierMode -- See comments in SimplMonad
908 | SimplPhase Int [String]
910 data SimplifierSwitch
911 = MaxSimplifierIterations Int
914 data FloatOutSwitches
915 = FloatOutSw Bool -- True <=> float lambdas to top level
916 Bool -- True <=> float constants to top level,
917 -- even if they do not escape a lambda
920 -- The core-to-core pass ordering is derived from the DynFlags:
921 runWhen :: Bool -> CoreToDo -> CoreToDo
922 runWhen True do_this = do_this
923 runWhen False _ = CoreDoNothing
925 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
926 runMaybe (Just x) f = f x
927 runMaybe Nothing _ = CoreDoNothing
929 getCoreToDo :: DynFlags -> [CoreToDo]
931 | Just todo <- coreToDo dflags = todo -- set explicitly by user
932 | otherwise = core_todo
934 opt_level = optLevel dflags
935 phases = simplPhases dflags
936 max_iter = maxSimplIterations dflags
937 strictness = dopt Opt_Strictness dflags
938 full_laziness = dopt Opt_FullLaziness dflags
939 cse = dopt Opt_CSE dflags
940 spec_constr = dopt Opt_SpecConstr dflags
941 liberate_case = dopt Opt_LiberateCase dflags
942 rule_check = ruleCheck dflags
943 static_args = dopt Opt_StaticArgumentTransformation dflags
945 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
947 simpl_phase phase names iter
949 [ CoreDoSimplify (SimplPhase phase names) [
950 MaxSimplifierIterations iter
952 maybe_rule_check phase
956 = runWhen (dopt Opt_Vectorise dflags)
957 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
960 -- By default, we have 2 phases before phase 0.
962 -- Want to run with inline phase 2 after the specialiser to give
963 -- maximum chance for fusion to work before we inline build/augment
964 -- in phase 1. This made a difference in 'ansi' where an
965 -- overloaded function wasn't inlined till too late.
967 -- Need phase 1 so that build/augment get
968 -- inlined. I found that spectral/hartel/genfft lost some useful
969 -- strictness in the function sumcode' if augment is not inlined
970 -- before strictness analysis runs
971 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
972 | phase <- [phases, phases-1 .. 1] ]
975 -- initial simplify: mk specialiser happy: minimum effort please
976 simpl_gently = CoreDoSimplify SimplGently [
978 -- Don't inline anything till full laziness has bitten
979 -- In particular, inlining wrappers inhibits floating
980 -- e.g. ...(case f x of ...)...
981 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
982 -- ==> ...(case x of I# x# -> case fw x# of ...)...
983 -- and now the redex (f x) isn't floatable any more
984 -- Similarly, don't apply any rules until after full
985 -- laziness. Notably, list fusion can prevent floating.
987 NoCaseOfCase, -- Don't do case-of-case transformations.
988 -- This makes full laziness work better
989 MaxSimplifierIterations max_iter
993 if opt_level == 0 then
995 simpl_phase 0 ["final"] max_iter]
996 else {- opt_level >= 1 -} [
998 -- We want to do the static argument transform before full laziness as it
999 -- may expose extra opportunities to float things outwards. However, to fix
1000 -- up the output of the transformation we need at do at least one simplify
1001 -- after this before anything else
1002 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1004 -- We run vectorisation here for now, but we might also try to run
1008 -- initial simplify: mk specialiser happy: minimum effort please
1011 -- Specialisation is best done before full laziness
1012 -- so that overloaded functions have all their dictionary lambdas manifest
1015 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1021 -- Phase 0: allow all Ids to be inlined now
1022 -- This gets foldr inlined before strictness analysis
1024 -- At least 3 iterations because otherwise we land up with
1025 -- huge dead expressions because of an infelicity in the
1027 -- let k = BIG in foldr k z xs
1028 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1029 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1031 simpl_phase 0 ["main"] (max max_iter 3),
1034 #ifdef OLD_STRICTNESS
1035 CoreDoOldStrictness,
1037 runWhen strictness (CoreDoPasses [
1039 CoreDoWorkerWrapper,
1041 simpl_phase 0 ["post-worker-wrapper"] max_iter
1044 runWhen full_laziness
1045 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1046 True)), -- Float constants
1047 -- nofib/spectral/hartel/wang doubles in speed if you
1048 -- do full laziness late in the day. It only happens
1049 -- after fusion and other stuff, so the early pass doesn't
1050 -- catch it. For the record, the redex is
1051 -- f_el22 (f_el21 r_midblock)
1054 runWhen cse CoreCSE,
1055 -- We want CSE to follow the final full-laziness pass, because it may
1056 -- succeed in commoning up things floated out by full laziness.
1057 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1063 -- Case-liberation for -O2. This should be after
1064 -- strictness analysis and the simplification which follows it.
1065 runWhen liberate_case (CoreDoPasses [
1067 simpl_phase 0 ["post-liberate-case"] max_iter
1068 ]), -- Run the simplifier after LiberateCase to vastly
1069 -- reduce the possiblility of shadowing
1070 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1072 runWhen spec_constr CoreDoSpecConstr,
1076 -- Final clean-up simplification:
1077 simpl_phase 0 ["final"] max_iter
1080 -- -----------------------------------------------------------------------------
1081 -- StgToDo: abstraction of stg-to-stg passes to run.
1084 = StgDoMassageForProfiling -- should be (next to) last
1085 -- There's also setStgVarInfo, but its absolute "lastness"
1086 -- is so critical that it is hardwired in (no flag).
1089 getStgToDo :: DynFlags -> [StgToDo]
1091 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1094 stg_stats = dopt Opt_StgStats dflags
1096 todo1 = if stg_stats then [D_stg_stats] else []
1098 todo2 | WayProf `elem` wayNames dflags
1099 = StgDoMassageForProfiling : todo1
1103 -- -----------------------------------------------------------------------------
1106 allFlags :: [String]
1107 allFlags = map ('-':) $
1108 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1109 map ("fno-"++) flags ++
1110 map ("f"++) flags ++
1111 map ("X"++) supportedLanguages ++
1112 map ("XNo"++) supportedLanguages
1113 where ok (PrefixPred _ _) = False
1115 flags = [ name | (name, _, _) <- fFlags ]
1117 dynamic_flags :: [Flag DynP]
1119 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1120 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1121 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1122 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1123 , Flag "v" (OptIntSuffix setVerbosity) Supported
1125 ------- Specific phases --------------------------------------------
1126 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1127 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1128 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1129 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1130 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1131 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1132 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1133 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1134 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1135 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1137 , Flag "optL" (HasArg (upd . addOptL)) Supported
1138 , Flag "optP" (HasArg (upd . addOptP)) Supported
1139 , Flag "optF" (HasArg (upd . addOptF)) Supported
1140 , Flag "optc" (HasArg (upd . addOptc)) Supported
1141 , Flag "optm" (HasArg (upd . addOptm)) Supported
1142 , Flag "opta" (HasArg (upd . addOpta)) Supported
1143 , Flag "optl" (HasArg (upd . addOptl)) Supported
1144 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1147 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1150 -------- ghc -M -----------------------------------------------------
1151 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1152 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1153 (Deprecated "Use -dep-suffix instead")
1154 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1155 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1156 (Deprecated "Use -dep-makefile instead")
1157 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1158 (Deprecated "-optdep-w doesn't do anything")
1159 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1160 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1161 (Deprecated "Use -include-pkg-deps instead")
1162 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1163 (Deprecated "Use -include-pkg-deps instead")
1164 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1165 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1166 (Deprecated "Use -exclude-module instead")
1167 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1168 (Deprecated "Use -exclude-module instead")
1170 -------- Linking ----------------------------------------------------
1171 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1173 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1174 (Deprecated "Use -c instead")
1175 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1177 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1180 ------- Libraries ---------------------------------------------------
1181 , Flag "L" (Prefix addLibraryPath ) Supported
1182 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1184 ------- Frameworks --------------------------------------------------
1185 -- -framework-path should really be -F ...
1186 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1187 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1189 ------- Output Redirection ------------------------------------------
1190 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1191 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1192 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1193 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1194 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1195 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1196 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1197 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1198 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1199 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1202 ------- Keeping temporary files -------------------------------------
1203 -- These can be singular (think ghc -c) or plural (think ghc --make)
1204 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1205 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1206 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1207 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1208 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1209 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1210 -- This only makes sense as plural
1211 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1213 ------- Miscellaneous ----------------------------------------------
1214 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1215 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1216 , Flag "main-is" (SepArg setMainIs ) Supported
1217 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1218 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1219 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1221 ------- recompilation checker --------------------------------------
1222 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1223 (Deprecated "Use -fno-force-recomp instead")
1224 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1225 (Deprecated "Use -fforce-recomp instead")
1227 ------- Packages ----------------------------------------------------
1228 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1229 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1231 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1232 , Flag "package" (HasArg exposePackage) Supported
1233 , Flag "hide-package" (HasArg hidePackage) Supported
1234 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1236 , Flag "ignore-package" (HasArg ignorePackage)
1238 , Flag "syslib" (HasArg exposePackage)
1239 (Deprecated "Use -package instead")
1241 ------ HsCpp opts ---------------------------------------------------
1242 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1243 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1245 ------- Include/Import Paths ----------------------------------------
1246 , Flag "I" (Prefix addIncludePath) Supported
1247 , Flag "i" (OptPrefix addImportPath ) Supported
1249 ------ Debugging ----------------------------------------------------
1250 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1252 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1254 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1256 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1258 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1260 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1262 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1264 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1266 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1268 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1270 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1272 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1274 , Flag "ddump-asm-regalloc-stages"
1275 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1277 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1279 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1281 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1283 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1285 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1287 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1289 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1291 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1293 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1295 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1297 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1299 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1301 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1303 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1305 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1307 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1309 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1311 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1313 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1315 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1317 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1319 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1321 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1323 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1325 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1327 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1329 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1331 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1333 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1335 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1337 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1339 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1341 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1343 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1345 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1347 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1349 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1351 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1353 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1355 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1357 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1359 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1361 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1364 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1366 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1368 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1370 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1372 , Flag "dshow-passes"
1373 (NoArg (do forceRecompile
1374 setVerbosity (Just 2)))
1376 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1379 ------ Machine dependant (-m<blah>) stuff ---------------------------
1381 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1383 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1385 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1388 ------ Warning opts -------------------------------------------------
1389 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1391 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1393 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1395 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1397 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1398 (Deprecated "Use -w instead")
1399 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1402 ------ Optimisation flags ------------------------------------------
1403 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1404 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1405 (Deprecated "Use -O0 instead")
1406 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1407 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1409 -- If the number is missing, use 1
1411 , Flag "fsimplifier-phases"
1412 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1414 , Flag "fmax-simplifier-iterations"
1415 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1418 , Flag "fspec-constr-threshold"
1419 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1421 , Flag "fno-spec-constr-threshold"
1422 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1424 , Flag "fspec-constr-count"
1425 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1427 , Flag "fno-spec-constr-count"
1428 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1430 , Flag "fliberate-case-threshold"
1431 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1433 , Flag "fno-liberate-case-threshold"
1434 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1437 , Flag "frule-check"
1438 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1440 , Flag "fcontext-stack"
1441 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1444 ------ DPH flags ----------------------------------------------------
1447 (NoArg (setDPHBackend DPHSeq))
1450 (NoArg (setDPHBackend DPHPar))
1453 (NoArg (setDPHBackend DPHThis))
1456 ------ Compiler flags -----------------------------------------------
1458 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1459 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1460 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1462 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1463 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1464 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1466 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1468 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1471 ++ map (mkFlag True "f" setDynFlag ) fFlags
1472 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1473 ++ map (mkFlag True "X" setDynFlag ) xFlags
1474 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1476 mkFlag :: Bool -- ^ True <=> it should be turned on
1477 -> String -- ^ The flag prefix
1478 -> (DynFlag -> DynP ())
1479 -> (String, DynFlag, Bool -> Deprecated)
1481 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1482 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1484 deprecatedForLanguage :: String -> Bool -> Deprecated
1485 deprecatedForLanguage lang turn_on
1486 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1488 flag | turn_on = lang
1489 | otherwise = "No"++lang
1491 useInstead :: String -> Bool -> Deprecated
1492 useInstead flag turn_on
1493 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1495 no = if turn_on then "" else "no-"
1497 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1498 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1500 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1501 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1502 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1503 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1504 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1505 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1506 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1507 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1508 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1509 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1510 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1511 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1512 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1513 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1514 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1515 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1516 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1517 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1518 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1519 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1520 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1521 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1522 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1523 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1524 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1525 ( "strictness", Opt_Strictness, const Supported ),
1526 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1527 ( "full-laziness", Opt_FullLaziness, const Supported ),
1528 ( "liberate-case", Opt_LiberateCase, const Supported ),
1529 ( "spec-constr", Opt_SpecConstr, const Supported ),
1530 ( "cse", Opt_CSE, const Supported ),
1531 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1532 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1533 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1534 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1535 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1536 ( "case-merge", Opt_CaseMerge, const Supported ),
1537 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1538 ( "method-sharing", Opt_MethodSharing, const Supported ),
1539 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1540 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1541 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1542 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1543 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1544 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1545 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1546 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1547 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1548 ( "break-on-error", Opt_BreakOnError, const Supported ),
1549 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1550 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1551 ( "run-cps", Opt_RunCPSZ, const Supported ),
1552 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1553 ( "vectorise", Opt_Vectorise, const Supported ),
1554 ( "regs-graph", Opt_RegsGraph, const Supported ),
1555 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1556 ( "th", Opt_TemplateHaskell,
1557 deprecatedForLanguage "TemplateHaskell" ),
1558 ( "fi", Opt_ForeignFunctionInterface,
1559 deprecatedForLanguage "ForeignFunctionInterface" ),
1560 ( "ffi", Opt_ForeignFunctionInterface,
1561 deprecatedForLanguage "ForeignFunctionInterface" ),
1562 ( "arrows", Opt_Arrows,
1563 deprecatedForLanguage "Arrows" ),
1564 ( "generics", Opt_Generics,
1565 deprecatedForLanguage "Generics" ),
1566 ( "implicit-prelude", Opt_ImplicitPrelude,
1567 deprecatedForLanguage "ImplicitPrelude" ),
1568 ( "bang-patterns", Opt_BangPatterns,
1569 deprecatedForLanguage "BangPatterns" ),
1570 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1571 deprecatedForLanguage "MonomorphismRestriction" ),
1572 ( "mono-pat-binds", Opt_MonoPatBinds,
1573 deprecatedForLanguage "MonoPatBinds" ),
1574 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1575 deprecatedForLanguage "ExtendedDefaultRules" ),
1576 ( "implicit-params", Opt_ImplicitParams,
1577 deprecatedForLanguage "ImplicitParams" ),
1578 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1579 deprecatedForLanguage "ScopedTypeVariables" ),
1581 deprecatedForLanguage "PArr" ),
1582 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1583 deprecatedForLanguage "OverlappingInstances" ),
1584 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1585 deprecatedForLanguage "UndecidableInstances" ),
1586 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1587 deprecatedForLanguage "IncoherentInstances" ),
1588 ( "gen-manifest", Opt_GenManifest, const Supported ),
1589 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1590 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1593 supportedLanguages :: [String]
1594 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1596 -- This may contain duplicates
1597 languageOptions :: [DynFlag]
1598 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1600 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1601 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1603 ( "CPP", Opt_Cpp, const Supported ),
1604 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1605 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1606 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1607 ( "MagicHash", Opt_MagicHash, const Supported ),
1608 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1609 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1610 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1611 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1612 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1613 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1614 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1615 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1616 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1617 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1618 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1619 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1620 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1621 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1622 ( "Arrows", Opt_Arrows, const Supported ),
1623 ( "PArr", Opt_PArr, const Supported ),
1624 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1625 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1626 ( "Generics", Opt_Generics, const Supported ),
1628 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1629 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1630 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1631 ( "RecordPuns", Opt_RecordPuns,
1632 deprecatedForLanguage "NamedFieldPuns" ),
1633 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1634 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1635 ( "GADTs", Opt_GADTs, const Supported ),
1636 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1637 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1638 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1640 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1641 -- On by default (which is not strictly H98):
1642 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1643 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1644 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1645 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1646 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1648 ( "PatternSignatures", Opt_ScopedTypeVariables,
1649 deprecatedForLanguage "ScopedTypeVariables" ),
1651 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1652 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1653 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1654 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1655 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1656 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1657 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1658 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1659 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1660 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1661 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1662 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1663 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1664 ( "PackageImports", Opt_PackageImports, const Supported )
1667 impliedFlags :: [(DynFlag, DynFlag)]
1669 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1670 -- be completely rigid for GADTs
1672 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1673 -- Note [Scoped tyvars] in TcBinds
1676 glasgowExtsFlags :: [DynFlag]
1677 glasgowExtsFlags = [
1678 Opt_PrintExplicitForalls
1679 , Opt_ForeignFunctionInterface
1680 , Opt_UnliftedFFITypes
1682 , Opt_ImplicitParams
1683 , Opt_ScopedTypeVariables
1685 , Opt_TypeSynonymInstances
1686 , Opt_StandaloneDeriving
1687 , Opt_DeriveDataTypeable
1688 , Opt_FlexibleContexts
1689 , Opt_FlexibleInstances
1690 , Opt_ConstrainedClassMethods
1691 , Opt_MultiParamTypeClasses
1692 , Opt_FunctionalDependencies
1694 , Opt_PolymorphicComponents
1695 , Opt_ExistentialQuantification
1697 , Opt_PostfixOperators
1699 , Opt_LiberalTypeSynonyms
1701 , Opt_ImpredicativeTypes
1704 , Opt_ParallelListComp
1705 , Opt_EmptyDataDecls
1706 , Opt_KindSignatures
1707 , Opt_GeneralizedNewtypeDeriving
1708 , Opt_TypeFamilies ]
1710 -- -----------------------------------------------------------------------------
1711 -- Parsing the dynamic flags.
1713 -- | Parse dynamic flags from a list of command line argument. Returns the
1714 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1715 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1716 -- flags or missing arguments).
1717 parseDynamicFlags :: Monad m =>
1718 DynFlags -> [Located String]
1719 -> m (DynFlags, [Located String], [Located String])
1720 -- ^ Updated 'DynFlags', left-over arguments, and
1721 -- list of warnings.
1722 parseDynamicFlags dflags args = do
1723 -- XXX Legacy support code
1724 -- We used to accept things like
1725 -- optdep-f -optdepdepend
1726 -- optdep-f -optdep depend
1727 -- optdep -f -optdepdepend
1728 -- optdep -f -optdep depend
1729 -- but the spaces trip up proper argument handling. So get rid of them.
1730 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1731 f (x : xs) = x : f xs
1734 let ((leftover, errs, warns), dflags')
1735 = runCmdLine (processArgs dynamic_flags args') dflags
1736 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1737 return (dflags', leftover, warns)
1739 type DynP = CmdLineP DynFlags
1741 upd :: (DynFlags -> DynFlags) -> DynP ()
1743 dfs <- getCmdLineState
1744 putCmdLineState $! (f dfs)
1746 --------------------------
1747 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1748 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1749 ; mapM_ setDynFlag deps }
1751 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1752 -- When you set f, set the ones it implies
1753 -- NB: use setDynFlag recursively, in case the implied flags
1754 -- implies further flags
1755 -- When you un-set f, however, we don't un-set the things it implies
1756 -- (except for -fno-glasgow-exts, which is treated specially)
1758 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1760 --------------------------
1761 setDumpFlag :: DynFlag -> OptKind DynP
1762 setDumpFlag dump_flag
1763 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1765 -- Certain dumpy-things are really interested in what's going
1766 -- on during recompilation checking, so in those cases we
1767 -- don't want to turn it off.
1768 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1769 Opt_D_dump_hi_diffs]
1771 forceRecompile :: DynP ()
1772 -- Whenver we -ddump, force recompilation (by switching off the
1773 -- recompilation checker), else you don't see the dump! However,
1774 -- don't switch it off in --make mode, else *everything* gets
1775 -- recompiled which probably isn't what you want
1776 forceRecompile = do { dfs <- getCmdLineState
1777 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1779 force_recomp dfs = isOneShot (ghcMode dfs)
1781 setVerboseCore2Core :: DynP ()
1782 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1784 upd (\s -> s { shouldDumpSimplPhase = const True })
1786 setDumpSimplPhases :: String -> DynP ()
1787 setDumpSimplPhases s = do forceRecompile
1788 upd (\s -> s { shouldDumpSimplPhase = spec })
1790 spec :: SimplifierMode -> Bool
1792 . map (join (&&) . map match . split ':')
1798 join :: (Bool -> Bool -> Bool)
1799 -> [SimplifierMode -> Bool]
1800 -> SimplifierMode -> Bool
1801 join _ [] = const True
1802 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1804 match :: String -> SimplifierMode -> Bool
1805 match "" = const True
1806 match s = case reads s of
1807 [(n,"")] -> phase_num n
1810 phase_num :: Int -> SimplifierMode -> Bool
1811 phase_num n (SimplPhase k _) = n == k
1812 phase_num _ _ = False
1814 phase_name :: String -> SimplifierMode -> Bool
1815 phase_name s SimplGently = s == "gentle"
1816 phase_name s (SimplPhase _ ss) = s `elem` ss
1818 setVerbosity :: Maybe Int -> DynP ()
1819 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1821 addCmdlineHCInclude :: String -> DynP ()
1822 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1824 extraPkgConf_ :: FilePath -> DynP ()
1825 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1827 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1829 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1831 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1833 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1835 setPackageName :: String -> DynFlags -> DynFlags
1837 | Nothing <- unpackPackageId pid
1838 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1840 = \s -> s{ thisPackage = pid }
1842 pid = stringToPackageId p
1844 -- If we're linking a binary, then only targets that produce object
1845 -- code are allowed (requests for other target types are ignored).
1846 setTarget :: HscTarget -> DynP ()
1847 setTarget l = upd set
1850 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1853 -- Changes the target only if we're compiling object code. This is
1854 -- used by -fasm and -fvia-C, which switch from one to the other, but
1855 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1856 -- can be safely used in an OPTIONS_GHC pragma.
1857 setObjTarget :: HscTarget -> DynP ()
1858 setObjTarget l = upd set
1861 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1864 setOptLevel :: Int -> DynFlags -> DynFlags
1865 setOptLevel n dflags
1866 | hscTarget dflags == HscInterpreted && n > 0
1868 -- not in IO any more, oh well:
1869 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1871 = updOptLevel n dflags
1874 -- -Odph is equivalent to
1876 -- -O2 optimise as much as possible
1877 -- -fno-method-sharing sharing specialisation defeats fusion
1879 -- -fdicts-cheap always inline dictionaries
1880 -- -fmax-simplifier-iterations20 this is necessary sometimes
1881 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1882 -- -fno-spec-constr-count SpecConstr as much as possible
1884 setDPHOpt :: DynFlags -> DynFlags
1885 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1886 , specConstrThreshold = Nothing
1887 , specConstrCount = Nothing
1889 `dopt_set` Opt_DictsCheap
1890 `dopt_unset` Opt_MethodSharing
1892 data DPHBackend = DPHPar
1895 deriving(Eq, Ord, Enum, Show)
1897 setDPHBackend :: DPHBackend -> DynP ()
1898 setDPHBackend backend
1900 upd $ \dflags -> dflags { dphBackend = backend }
1901 mapM_ exposePackage (dph_packages backend)
1903 dph_packages DPHThis = []
1904 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1905 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1907 dphPackage :: DynFlags -> PackageId
1908 dphPackage dflags = case dphBackend dflags of
1909 DPHPar -> dphParPackageId
1910 DPHSeq -> dphSeqPackageId
1911 DPHThis -> thisPackage dflags
1913 setMainIs :: String -> DynP ()
1915 | not (null main_fn) && isLower (head main_fn)
1916 -- The arg looked like "Foo.Bar.baz"
1917 = upd $ \d -> d{ mainFunIs = Just main_fn,
1918 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1920 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1921 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1923 | otherwise -- The arg looked like "baz"
1924 = upd $ \d -> d{ mainFunIs = Just arg }
1926 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1928 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1929 -- Either returns the default name or the one configured on the command line with -main-is
1930 getMainFun :: DynFlags -> RdrName
1931 getMainFun dflags = case (mainFunIs dflags) of
1932 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1933 Nothing -> main_RDR_Unqual
1935 -----------------------------------------------------------------------------
1936 -- Paths & Libraries
1938 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1940 -- -i on its own deletes the import paths
1941 addImportPath "" = upd (\s -> s{importPaths = []})
1942 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1946 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1949 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1951 addFrameworkPath p =
1952 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1954 #ifndef mingw32_TARGET_OS
1955 split_marker :: Char
1956 split_marker = ':' -- not configurable (ToDo)
1959 splitPathList :: String -> [String]
1960 splitPathList s = filter notNull (splitUp s)
1961 -- empty paths are ignored: there might be a trailing
1962 -- ':' in the initial list, for example. Empty paths can
1963 -- cause confusion when they are translated into -I options
1964 -- for passing to gcc.
1966 #ifndef mingw32_TARGET_OS
1967 splitUp xs = split split_marker xs
1969 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1971 -- That is, if "foo:bar:baz" is used, this interpreted as
1972 -- consisting of three entries, 'foo', 'bar', 'baz'.
1973 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1974 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1976 -- Notice that no attempt is made to fully replace the 'standard'
1977 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1978 -- that this will cause too much breakage for users & ':' will
1979 -- work fine even with DOS paths, if you're not insisting on being silly.
1982 splitUp (x:':':div:xs) | div `elem` dir_markers
1983 = ((x:':':div:p): splitUp rs)
1985 (p,rs) = findNextPath xs
1986 -- we used to check for existence of the path here, but that
1987 -- required the IO monad to be threaded through the command-line
1988 -- parser which is quite inconvenient. The
1989 splitUp xs = cons p (splitUp rs)
1991 (p,rs) = findNextPath xs
1996 -- will be called either when we've consumed nought or the
1997 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1998 -- finding the next split marker.
2000 case break (`elem` split_markers) xs of
2001 (p, _:ds) -> (p, ds)
2004 split_markers :: [Char]
2005 split_markers = [':', ';']
2007 dir_markers :: [Char]
2008 dir_markers = ['/', '\\']
2011 -- -----------------------------------------------------------------------------
2012 -- tmpDir, where we store temporary files.
2014 setTmpDir :: FilePath -> DynFlags -> DynFlags
2015 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2016 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2017 -- seem necessary now --SDM 7/2/2008
2019 -----------------------------------------------------------------------------
2022 setOptHpcDir :: String -> DynP ()
2023 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2025 -----------------------------------------------------------------------------
2026 -- Via-C compilation stuff
2028 -- There are some options that we need to pass to gcc when compiling
2029 -- Haskell code via C, but are only supported by recent versions of
2030 -- gcc. The configure script decides which of these options we need,
2031 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2032 -- read before each via-C compilation. The advantage of having these
2033 -- in a separate file is that the file can be created at install-time
2034 -- depending on the available gcc version, and even re-generated later
2035 -- if gcc is upgraded.
2037 -- The options below are not dependent on the version of gcc, only the
2040 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2041 [String]) -- for registerised HC compilations
2042 machdepCCOpts _dflags
2043 #if alpha_TARGET_ARCH
2045 #ifdef HAVE_THREADED_RTS_SUPPORT
2049 -- For now, to suppress the gcc warning "call-clobbered
2050 -- register used for global register variable", we simply
2051 -- disable all warnings altogether using the -w flag. Oh well.
2053 #elif hppa_TARGET_ARCH
2054 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2055 -- (very nice, but too bad the HP /usr/include files don't agree.)
2056 = ( ["-D_HPUX_SOURCE"], [] )
2058 #elif m68k_TARGET_ARCH
2059 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2060 -- popping of args to routines to be explicit; if we let things
2061 -- be deferred 'til after an STGJUMP, imminent death is certain!
2063 -- -fomit-frame-pointer : *don't*
2064 -- It's better to have a6 completely tied up being a frame pointer
2065 -- rather than let GCC pick random things to do with it.
2066 -- (If we want to steal a6, then we would try to do things
2067 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2068 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2070 #elif i386_TARGET_ARCH
2071 -- -fno-defer-pop : basically the same game as for m68k
2073 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2074 -- the fp (%ebp) for our register maps.
2075 = let n_regs = stolen_x86_regs _dflags
2078 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2081 "-fomit-frame-pointer",
2082 -- we want -fno-builtin, because when gcc inlines
2083 -- built-in functions like memcpy() it tends to
2084 -- run out of registers, requiring -monly-n-regs
2086 "-DSTOLEN_X86_REGS="++show n_regs ]
2089 #elif ia64_TARGET_ARCH
2090 = ( [], ["-fomit-frame-pointer", "-G0"] )
2092 #elif x86_64_TARGET_ARCH
2093 = ( [], ["-fomit-frame-pointer",
2094 "-fno-asynchronous-unwind-tables",
2095 -- the unwind tables are unnecessary for HC code,
2096 -- and get in the way of -split-objs. Another option
2097 -- would be to throw them away in the mangler, but this
2100 -- calling builtins like strlen() using the FFI can
2101 -- cause gcc to run out of regs, so use the external
2105 #elif sparc_TARGET_ARCH
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 powerpc_apple_darwin_TARGET
2113 -- Disable Apple's precompiling preprocessor. It's a great thing
2114 -- for "normal" programs, but it doesn't support register variable
2116 = ( [], ["-no-cpp-precomp"] )
2121 picCCOpts :: DynFlags -> [String]
2123 #if darwin_TARGET_OS
2124 -- Apple prefers to do things the other way round.
2125 -- PIC is on by default.
2126 -- -mdynamic-no-pic:
2127 -- Turn off PIC code generation.
2129 -- Don't generate "common" symbols - these are unwanted
2130 -- in dynamic libraries.
2133 = ["-fno-common", "-D__PIC__"]
2135 = ["-mdynamic-no-pic"]
2136 #elif mingw32_TARGET_OS
2137 -- no -fPIC for Windows
2144 = ["-fPIC", "-D__PIC__"]
2149 -- -----------------------------------------------------------------------------
2153 can_split = cSplitObjs == "YES"
2155 -- -----------------------------------------------------------------------------
2158 compilerInfo :: [(String, String)]
2159 compilerInfo = [("Project name", cProjectName),
2160 ("Project version", cProjectVersion),
2161 ("Booter version", cBooterVersion),
2163 ("Interface file version", cHscIfaceFileVersion),
2164 ("Have interpreter", cGhcWithInterpreter),
2165 ("Object splitting", cSplitObjs),
2166 ("Have native code generator", cGhcWithNativeCodeGen),
2167 ("Support SMP", cGhcWithSMP),
2168 ("Unregisterised", cGhcUnregisterised),
2169 ("Tables next to code", cGhcEnableTablesNextToCode),
2170 ("Win32 DLLs", cEnableWin32DLLs),
2171 ("RTS ways", cGhcRTSWays),
2172 ("Leading underscore", cLeadingUnderscore),
2173 ("Debug on", show debugIsOn)