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
243 | Opt_NewQualifiedOperators
245 | Opt_PrintExplicitForalls
250 | Opt_StaticArgumentTransformation
254 | Opt_IgnoreInterfacePragmas
255 | Opt_OmitInterfacePragmas
256 | Opt_DoLambdaEtaExpansion
260 | Opt_UnboxStrictFields
263 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
265 | Opt_RegsGraph -- do graph coloring register allocation
266 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
274 | Opt_ExcessPrecision
275 | Opt_ReadUserPackageConf
279 | Opt_HideAllPackages
280 | Opt_PrintBindResult
284 | Opt_BreakOnException
286 | Opt_PrintEvldWithShow
287 | Opt_PrintBindContents
291 | Opt_ConvertToZipCfgAndBack
292 | Opt_AutoLinkPackages
293 | Opt_ImplicitImportQualified
301 | Opt_KeepRawTokenStream
305 -- | Contains not only a collection of 'DynFlag's but also a plethora of
306 -- information relating to the compilation of a single file or GHC session
307 data DynFlags = DynFlags {
310 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
311 stgToDo :: Maybe [StgToDo], -- similarly
312 hscTarget :: HscTarget,
313 hscOutName :: String, -- ^ Name of the output file
314 extCoreName :: String, -- ^ Name of the .hcr output file
315 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
316 optLevel :: Int, -- ^ Optimisation level
317 simplPhases :: Int, -- ^ Number of simplifier phases
318 maxSimplIterations :: Int, -- ^ Max simplifier iterations
319 shouldDumpSimplPhase :: SimplifierMode -> Bool,
320 ruleCheck :: Maybe String,
322 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
323 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
324 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
326 stolen_x86_regs :: Int,
327 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
328 importPaths :: [FilePath],
330 mainFunIs :: Maybe String,
331 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
333 dphBackend :: DPHBackend,
335 thisPackage :: PackageId, -- ^ name of package currently being compiled
338 wayNames :: [WayName], -- ^ Way flags from the command line
339 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
340 rtsBuildTag :: String, -- ^ The RTS \"way\"
343 objectDir :: Maybe String,
344 hiDir :: Maybe String,
345 stubDir :: Maybe String,
351 outputFile :: Maybe String,
352 outputHi :: Maybe String,
353 dynLibLoader :: DynLibLoader,
355 -- | This is set by 'DriverPipeline.runPipeline' based on where
356 -- its output is going.
357 dumpPrefix :: Maybe FilePath,
359 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
360 -- Set by @-ddump-file-prefix@
361 dumpPrefixForce :: Maybe FilePath,
363 includePaths :: [String],
364 libraryPaths :: [String],
365 frameworkPaths :: [String], -- used on darwin only
366 cmdlineFrameworks :: [String], -- ditto
367 tmpDir :: String, -- no trailing '/'
369 ghcUsagePath :: FilePath, -- Filled in by SysTools
370 ghciUsagePath :: FilePath, -- ditto
372 hpcDir :: String, -- ^ Path to store the .mix files
374 -- options for particular phases
382 opt_windres :: [String],
384 -- commands for particular phases
386 pgm_P :: (String,[Option]),
388 pgm_c :: (String,[Option]),
389 pgm_m :: (String,[Option]),
390 pgm_s :: (String,[Option]),
391 pgm_a :: (String,[Option]),
392 pgm_l :: (String,[Option]),
393 pgm_dll :: (String,[Option]),
395 pgm_sysman :: String,
396 pgm_windres :: String,
399 depMakefile :: FilePath,
400 depIncludePkgDeps :: Bool,
401 depExcludeMods :: [ModuleName],
402 depSuffixes :: [String],
406 extraPkgConfs :: [FilePath],
407 topDir :: FilePath, -- filled in by SysTools
408 systemPackageConfig :: FilePath, -- ditto
409 -- ^ The @-package-conf@ flags given on the command line, in the order
412 packageFlags :: [PackageFlag],
413 -- ^ The @-package@ and @-hide-package@ flags from the command-line
416 -- NB. do not modify this field, it is calculated by
417 -- Packages.initPackages and Packages.updatePackages.
418 pkgDatabase :: Maybe (UniqFM PackageConfig),
419 pkgState :: PackageState,
424 -- | Message output action: use "ErrUtils" instead of this if you can
425 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
427 haddockOptions :: Maybe String
438 -- | Will this target result in an object file on the disk?
439 isObjectTarget :: HscTarget -> Bool
440 isObjectTarget HscC = True
441 isObjectTarget HscAsm = True
442 isObjectTarget _ = False
444 -- | The 'GhcMode' tells us whether we're doing multi-module
445 -- compilation (controlled via the "GHC" API) or one-shot
446 -- (single-module) compilation. This makes a difference primarily to
447 -- the "Finder": in one-shot mode we look for interface files for
448 -- imported modules, but in multi-module mode we look for source files
449 -- in order to check whether they need to be recompiled.
451 = CompManager -- ^ @\-\-make@, GHCi, etc.
452 | OneShot -- ^ @ghc -c Foo.hs@
453 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
456 instance Outputable GhcMode where
457 ppr CompManager = ptext (sLit "CompManager")
458 ppr OneShot = ptext (sLit "OneShot")
459 ppr MkDepend = ptext (sLit "MkDepend")
461 isOneShot :: GhcMode -> Bool
462 isOneShot OneShot = True
463 isOneShot _other = False
465 -- | What to do in the link step, if there is one.
467 = NoLink -- ^ Don't link at all
468 | LinkBinary -- ^ Link object code into a binary
469 | LinkInMemory -- ^ Use the in-memory dynamic linker
470 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
473 isNoLink :: GhcLink -> Bool
474 isNoLink NoLink = True
478 = ExposePackage String
480 | IgnorePackage String
483 defaultHscTarget :: HscTarget
484 defaultHscTarget = defaultObjectTarget
486 -- | The 'HscTarget' value corresponding to the default way to create
487 -- object files on the current platform.
488 defaultObjectTarget :: HscTarget
490 | cGhcWithNativeCodeGen == "YES" = HscAsm
495 | Wrapped (Maybe String)
499 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
500 initDynFlags :: DynFlags -> IO DynFlags
501 initDynFlags dflags = do
502 -- someday these will be dynamic flags
503 ways <- readIORef v_Ways
504 build_tag <- readIORef v_Build_tag
505 rts_build_tag <- readIORef v_RTS_Build_tag
508 buildTag = build_tag,
509 rtsBuildTag = rts_build_tag
512 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
513 -- and must be fully initialized by 'GHC.newSession' first.
514 defaultDynFlags :: DynFlags
517 ghcMode = CompManager,
518 ghcLink = LinkBinary,
521 hscTarget = defaultHscTarget,
527 maxSimplIterations = 4,
528 shouldDumpSimplPhase = const False,
530 specConstrThreshold = Just 200,
531 specConstrCount = Just 3,
532 liberateCaseThreshold = Just 200,
534 cmdlineHcIncludes = [],
538 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
542 thisPackage = mainPackageId,
548 objectSuf = phaseInputExt StopLn,
549 hcSuf = phaseInputExt HCc,
552 outputFile = Nothing,
554 dynLibLoader = Deployable,
555 dumpPrefix = Nothing,
556 dumpPrefixForce = Nothing,
560 cmdlineFrameworks = [],
561 tmpDir = cDEFAULT_TMPDIR,
578 pkgDatabase = Nothing,
579 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
580 wayNames = panic "defaultDynFlags: No wayNames",
581 buildTag = panic "defaultDynFlags: No buildTag",
582 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
583 -- initSysTools fills all these in
584 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
585 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
586 topDir = panic "defaultDynFlags: No topDir",
587 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
588 pgm_L = panic "defaultDynFlags: No pgm_L",
589 pgm_P = panic "defaultDynFlags: No pgm_P",
590 pgm_F = panic "defaultDynFlags: No pgm_F",
591 pgm_c = panic "defaultDynFlags: No pgm_c",
592 pgm_m = panic "defaultDynFlags: No pgm_m",
593 pgm_s = panic "defaultDynFlags: No pgm_s",
594 pgm_a = panic "defaultDynFlags: No pgm_a",
595 pgm_l = panic "defaultDynFlags: No pgm_l",
596 pgm_dll = panic "defaultDynFlags: No pgm_dll",
597 pgm_T = panic "defaultDynFlags: No pgm_T",
598 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
599 pgm_windres = panic "defaultDynFlags: No pgm_windres",
600 -- end of initSysTools values
602 depMakefile = "Makefile",
603 depIncludePkgDeps = False,
607 -- end of ghc -M values
608 haddockOptions = Nothing,
610 Opt_AutoLinkPackages,
611 Opt_ReadUserPackageConf,
613 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
614 -- behaviour the default, to see if anyone notices
618 Opt_MonomorphismRestriction,
626 Opt_PrintBindContents
628 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
629 -- The default -O0 options
632 log_action = \severity srcSpan style msg ->
634 SevInfo -> printErrs (msg style)
635 SevFatal -> printErrs (msg style)
638 printErrs ((mkLocMessage srcSpan msg) style)
639 -- careful (#2302): printErrs prints in UTF-8, whereas
640 -- converting to string first and using hPutStr would
641 -- just emit the low 8 bits of each unicode char.
648 0 | print errors & warnings only
649 1 | minimal verbosity: print "compiling M ... done." for each module.
650 2 | equivalent to -dshow-passes
651 3 | equivalent to existing "ghc -v"
652 4 | "ghc -v -ddump-most"
653 5 | "ghc -v -ddump-all"
656 -- | Test whether a 'DynFlag' is set
657 dopt :: DynFlag -> DynFlags -> Bool
658 dopt f dflags = f `elem` (flags dflags)
661 dopt_set :: DynFlags -> DynFlag -> DynFlags
662 dopt_set dfs f = dfs{ flags = f : flags dfs }
664 -- | Unset a 'DynFlag'
665 dopt_unset :: DynFlags -> DynFlag -> DynFlags
666 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
668 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
669 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
670 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
671 -> [a] -- ^ Correctly ordered extracted options
672 getOpts dflags opts = reverse (opts dflags)
673 -- We add to the options from the front, so we need to reverse the list
675 -- | Gets the verbosity flag for the current verbosity level. This is fed to
676 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
677 getVerbFlag :: DynFlags -> String
679 | verbosity dflags >= 3 = "-v"
682 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
683 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
684 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
685 addCmdlineFramework, addHaddockOpts
686 :: String -> DynFlags -> DynFlags
687 setOutputFile, setOutputHi, setDumpPrefixForce
688 :: Maybe String -> DynFlags -> DynFlags
690 setObjectDir f d = d{ objectDir = Just f}
691 setHiDir f d = d{ hiDir = Just f}
692 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
693 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
694 -- \#included from the .hc file when compiling with -fvia-C.
696 setObjectSuf f d = d{ objectSuf = f}
697 setHiSuf f d = d{ hiSuf = f}
698 setHcSuf f d = d{ hcSuf = f}
700 setOutputFile f d = d{ outputFile = f}
701 setOutputHi f d = d{ outputHi = f}
703 parseDynLibLoaderMode f d =
705 ("deploy", "") -> d{ dynLibLoader = Deployable }
706 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
707 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
708 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
709 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
710 (_,_) -> error "Unknown dynlib loader"
712 setDumpPrefixForce f d = d { dumpPrefixForce = f}
714 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
715 -- Config.hs should really use Option.
716 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
718 setPgmL f d = d{ pgm_L = f}
719 setPgmF f d = d{ pgm_F = f}
720 setPgmc f d = d{ pgm_c = (f,[])}
721 setPgmm f d = d{ pgm_m = (f,[])}
722 setPgms f d = d{ pgm_s = (f,[])}
723 setPgma f d = d{ pgm_a = (f,[])}
724 setPgml f d = d{ pgm_l = (f,[])}
725 setPgmdll f d = d{ pgm_dll = (f,[])}
726 setPgmwindres f d = d{ pgm_windres = f}
728 addOptL f d = d{ opt_L = f : opt_L d}
729 addOptP f d = d{ opt_P = f : opt_P d}
730 addOptF f d = d{ opt_F = f : opt_F d}
731 addOptc f d = d{ opt_c = f : opt_c d}
732 addOptm f d = d{ opt_m = f : opt_m d}
733 addOpta f d = d{ opt_a = f : opt_a d}
734 addOptl f d = d{ opt_l = f : opt_l d}
735 addOptwindres f d = d{ opt_windres = f : opt_windres d}
737 setDepMakefile :: FilePath -> DynFlags -> DynFlags
738 setDepMakefile f d = d { depMakefile = deOptDep f }
740 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
741 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
743 addDepExcludeMod :: String -> DynFlags -> DynFlags
745 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
747 addDepSuffix :: FilePath -> DynFlags -> DynFlags
748 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
750 setDepWarnings :: Bool -> DynFlags -> DynFlags
751 setDepWarnings b d = d { depWarnings = b }
754 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
755 -- we need to strip the "-optdep" off of the arg
756 deOptDep :: String -> String
757 deOptDep x = case maybePrefixMatch "-optdep" x of
761 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
763 addHaddockOpts f d = d{ haddockOptions = Just f}
765 -- -----------------------------------------------------------------------------
766 -- Command-line options
768 -- | When invoking external tools as part of the compilation pipeline, we
769 -- pass these a sequence of options on the command-line. Rather than
770 -- just using a list of Strings, we use a type that allows us to distinguish
771 -- between filepaths and 'other stuff'. The reason for this is that
772 -- this type gives us a handle on transforming filenames, and filenames only,
773 -- to whatever format they're expected to be on a particular platform.
775 = FileOption -- an entry that _contains_ filename(s) / filepaths.
776 String -- a non-filepath prefix that shouldn't be
777 -- transformed (e.g., "/out=")
778 String -- the filepath/filename portion
781 -----------------------------------------------------------------------------
782 -- Setting the optimisation level
784 updOptLevel :: Int -> DynFlags -> DynFlags
785 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
787 = dfs2{ optLevel = final_n }
789 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
790 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
791 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
793 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
794 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
796 optLevelFlags :: [([Int], DynFlag)]
798 = [ ([0], Opt_IgnoreInterfacePragmas)
799 , ([0], Opt_OmitInterfacePragmas)
801 , ([1,2], Opt_IgnoreAsserts)
802 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
804 , ([1,2], Opt_DoEtaReduction)
805 , ([1,2], Opt_CaseMerge)
806 , ([1,2], Opt_Strictness)
808 , ([1,2], Opt_FullLaziness)
810 , ([2], Opt_LiberateCase)
811 , ([2], Opt_SpecConstr)
813 -- , ([2], Opt_StaticArgumentTransformation)
814 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
815 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
816 -- several improvements to the heuristics, and I'm concerned that without
817 -- those changes SAT will interfere with some attempts to write "high
818 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
819 -- this year. In particular, the version in HEAD lacks the tail call
820 -- criterion, so many things that look like reasonable loops will be
821 -- turned into functions with extra (unneccesary) thunk creation.
823 , ([0,1,2], Opt_DoLambdaEtaExpansion)
824 -- This one is important for a tiresome reason:
825 -- we want to make sure that the bindings for data
826 -- constructors are eta-expanded. This is probably
827 -- a good thing anyway, but it seems fragile.
830 -- -----------------------------------------------------------------------------
831 -- Standard sets of warning options
833 standardWarnings :: [DynFlag]
835 = [ Opt_WarnWarningsDeprecations,
836 Opt_WarnDeprecatedFlags,
837 Opt_WarnUnrecognisedPragmas,
838 Opt_WarnOverlappingPatterns,
839 Opt_WarnMissingFields,
840 Opt_WarnMissingMethods,
841 Opt_WarnDuplicateExports,
842 Opt_WarnDodgyForeignImports
845 minusWOpts :: [DynFlag]
847 = standardWarnings ++
848 [ Opt_WarnUnusedBinds,
849 Opt_WarnUnusedMatches,
850 Opt_WarnUnusedImports,
851 Opt_WarnIncompletePatterns,
855 minusWallOpts :: [DynFlag]
858 [ Opt_WarnTypeDefaults,
859 Opt_WarnNameShadowing,
865 -- minuswRemovesOpts should be every warning option
866 minuswRemovesOpts :: [DynFlag]
869 [Opt_WarnImplicitPrelude,
870 Opt_WarnIncompletePatternsRecUpd,
871 Opt_WarnSimplePatterns,
872 Opt_WarnMonomorphism,
873 Opt_WarnUnrecognisedPragmas,
877 -- -----------------------------------------------------------------------------
878 -- CoreToDo: abstraction of core-to-core passes to run.
880 data CoreToDo -- These are diff core-to-core passes,
881 -- which may be invoked in any order,
882 -- as many times as you like.
884 = CoreDoSimplify -- The core-to-core simplifier.
887 -- Each run of the simplifier can take a different
888 -- set of simplifier-specific flags.
890 | CoreDoFloatOutwards FloatOutSwitches
895 | CoreDoWorkerWrapper
898 | CoreDoOldStrictness
901 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
902 -- matching this string
903 | CoreDoVectorisation PackageId
904 | CoreDoNothing -- Useful when building up
905 | CoreDoPasses [CoreToDo] -- lists of these things
907 data SimplifierMode -- See comments in SimplMonad
909 | SimplPhase Int [String]
911 data SimplifierSwitch
912 = MaxSimplifierIterations Int
915 data FloatOutSwitches
916 = FloatOutSw Bool -- True <=> float lambdas to top level
917 Bool -- True <=> float constants to top level,
918 -- even if they do not escape a lambda
921 -- The core-to-core pass ordering is derived from the DynFlags:
922 runWhen :: Bool -> CoreToDo -> CoreToDo
923 runWhen True do_this = do_this
924 runWhen False _ = CoreDoNothing
926 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
927 runMaybe (Just x) f = f x
928 runMaybe Nothing _ = CoreDoNothing
930 getCoreToDo :: DynFlags -> [CoreToDo]
932 | Just todo <- coreToDo dflags = todo -- set explicitly by user
933 | otherwise = core_todo
935 opt_level = optLevel dflags
936 phases = simplPhases dflags
937 max_iter = maxSimplIterations dflags
938 strictness = dopt Opt_Strictness dflags
939 full_laziness = dopt Opt_FullLaziness dflags
940 cse = dopt Opt_CSE dflags
941 spec_constr = dopt Opt_SpecConstr dflags
942 liberate_case = dopt Opt_LiberateCase dflags
943 rule_check = ruleCheck dflags
944 static_args = dopt Opt_StaticArgumentTransformation dflags
946 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
948 simpl_phase phase names iter
950 [ CoreDoSimplify (SimplPhase phase names) [
951 MaxSimplifierIterations iter
953 maybe_rule_check phase
957 = runWhen (dopt Opt_Vectorise dflags)
958 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
961 -- By default, we have 2 phases before phase 0.
963 -- Want to run with inline phase 2 after the specialiser to give
964 -- maximum chance for fusion to work before we inline build/augment
965 -- in phase 1. This made a difference in 'ansi' where an
966 -- overloaded function wasn't inlined till too late.
968 -- Need phase 1 so that build/augment get
969 -- inlined. I found that spectral/hartel/genfft lost some useful
970 -- strictness in the function sumcode' if augment is not inlined
971 -- before strictness analysis runs
972 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
973 | phase <- [phases, phases-1 .. 1] ]
976 -- initial simplify: mk specialiser happy: minimum effort please
977 simpl_gently = CoreDoSimplify SimplGently [
979 -- Don't inline anything till full laziness has bitten
980 -- In particular, inlining wrappers inhibits floating
981 -- e.g. ...(case f x of ...)...
982 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
983 -- ==> ...(case x of I# x# -> case fw x# of ...)...
984 -- and now the redex (f x) isn't floatable any more
985 -- Similarly, don't apply any rules until after full
986 -- laziness. Notably, list fusion can prevent floating.
988 NoCaseOfCase, -- Don't do case-of-case transformations.
989 -- This makes full laziness work better
990 MaxSimplifierIterations max_iter
994 if opt_level == 0 then
996 simpl_phase 0 ["final"] max_iter]
997 else {- opt_level >= 1 -} [
999 -- We want to do the static argument transform before full laziness as it
1000 -- may expose extra opportunities to float things outwards. However, to fix
1001 -- up the output of the transformation we need at do at least one simplify
1002 -- after this before anything else
1003 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1005 -- We run vectorisation here for now, but we might also try to run
1009 -- initial simplify: mk specialiser happy: minimum effort please
1012 -- Specialisation is best done before full laziness
1013 -- so that overloaded functions have all their dictionary lambdas manifest
1016 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1022 -- Phase 0: allow all Ids to be inlined now
1023 -- This gets foldr inlined before strictness analysis
1025 -- At least 3 iterations because otherwise we land up with
1026 -- huge dead expressions because of an infelicity in the
1028 -- let k = BIG in foldr k z xs
1029 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1030 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1032 simpl_phase 0 ["main"] (max max_iter 3),
1035 #ifdef OLD_STRICTNESS
1036 CoreDoOldStrictness,
1038 runWhen strictness (CoreDoPasses [
1040 CoreDoWorkerWrapper,
1042 simpl_phase 0 ["post-worker-wrapper"] max_iter
1045 runWhen full_laziness
1046 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1047 True)), -- Float constants
1048 -- nofib/spectral/hartel/wang doubles in speed if you
1049 -- do full laziness late in the day. It only happens
1050 -- after fusion and other stuff, so the early pass doesn't
1051 -- catch it. For the record, the redex is
1052 -- f_el22 (f_el21 r_midblock)
1055 runWhen cse CoreCSE,
1056 -- We want CSE to follow the final full-laziness pass, because it may
1057 -- succeed in commoning up things floated out by full laziness.
1058 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1064 -- Case-liberation for -O2. This should be after
1065 -- strictness analysis and the simplification which follows it.
1066 runWhen liberate_case (CoreDoPasses [
1068 simpl_phase 0 ["post-liberate-case"] max_iter
1069 ]), -- Run the simplifier after LiberateCase to vastly
1070 -- reduce the possiblility of shadowing
1071 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1073 runWhen spec_constr CoreDoSpecConstr,
1077 -- Final clean-up simplification:
1078 simpl_phase 0 ["final"] max_iter
1081 -- -----------------------------------------------------------------------------
1082 -- StgToDo: abstraction of stg-to-stg passes to run.
1085 = StgDoMassageForProfiling -- should be (next to) last
1086 -- There's also setStgVarInfo, but its absolute "lastness"
1087 -- is so critical that it is hardwired in (no flag).
1090 getStgToDo :: DynFlags -> [StgToDo]
1092 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1095 stg_stats = dopt Opt_StgStats dflags
1097 todo1 = if stg_stats then [D_stg_stats] else []
1099 todo2 | WayProf `elem` wayNames dflags
1100 = StgDoMassageForProfiling : todo1
1104 -- -----------------------------------------------------------------------------
1107 allFlags :: [String]
1108 allFlags = map ('-':) $
1109 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1110 map ("fno-"++) flags ++
1111 map ("f"++) flags ++
1112 map ("X"++) supportedLanguages ++
1113 map ("XNo"++) supportedLanguages
1114 where ok (PrefixPred _ _) = False
1116 flags = [ name | (name, _, _) <- fFlags ]
1118 dynamic_flags :: [Flag DynP]
1120 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1121 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1122 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1123 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1124 , Flag "v" (OptIntSuffix setVerbosity) Supported
1126 ------- Specific phases --------------------------------------------
1127 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1128 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1129 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1130 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1131 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1132 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1133 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1134 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1135 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1136 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1138 , Flag "optL" (HasArg (upd . addOptL)) Supported
1139 , Flag "optP" (HasArg (upd . addOptP)) Supported
1140 , Flag "optF" (HasArg (upd . addOptF)) Supported
1141 , Flag "optc" (HasArg (upd . addOptc)) Supported
1142 , Flag "optm" (HasArg (upd . addOptm)) Supported
1143 , Flag "opta" (HasArg (upd . addOpta)) Supported
1144 , Flag "optl" (HasArg (upd . addOptl)) Supported
1145 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1148 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1151 -------- ghc -M -----------------------------------------------------
1152 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1153 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1154 (Deprecated "Use -dep-suffix instead")
1155 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1156 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1157 (Deprecated "Use -dep-makefile instead")
1158 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1159 (Deprecated "-optdep-w doesn't do anything")
1160 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1161 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1162 (Deprecated "Use -include-pkg-deps instead")
1163 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1164 (Deprecated "Use -include-pkg-deps instead")
1165 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1166 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1167 (Deprecated "Use -exclude-module instead")
1168 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1169 (Deprecated "Use -exclude-module instead")
1171 -------- Linking ----------------------------------------------------
1172 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1174 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1175 (Deprecated "Use -c instead")
1176 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1178 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1181 ------- Libraries ---------------------------------------------------
1182 , Flag "L" (Prefix addLibraryPath ) Supported
1183 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1185 ------- Frameworks --------------------------------------------------
1186 -- -framework-path should really be -F ...
1187 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1188 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1190 ------- Output Redirection ------------------------------------------
1191 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1192 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1193 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1194 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1195 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1196 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1197 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1198 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1199 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1200 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1203 ------- Keeping temporary files -------------------------------------
1204 -- These can be singular (think ghc -c) or plural (think ghc --make)
1205 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1206 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1207 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1208 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1209 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1210 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1211 -- This only makes sense as plural
1212 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1214 ------- Miscellaneous ----------------------------------------------
1215 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1216 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1217 , Flag "main-is" (SepArg setMainIs ) Supported
1218 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1219 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1220 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1222 ------- recompilation checker --------------------------------------
1223 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1224 (Deprecated "Use -fno-force-recomp instead")
1225 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1226 (Deprecated "Use -fforce-recomp instead")
1228 ------- Packages ----------------------------------------------------
1229 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1230 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1232 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1233 , Flag "package" (HasArg exposePackage) Supported
1234 , Flag "hide-package" (HasArg hidePackage) Supported
1235 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1237 , Flag "ignore-package" (HasArg ignorePackage)
1239 , Flag "syslib" (HasArg exposePackage)
1240 (Deprecated "Use -package instead")
1242 ------ HsCpp opts ---------------------------------------------------
1243 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1244 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1246 ------- Include/Import Paths ----------------------------------------
1247 , Flag "I" (Prefix addIncludePath) Supported
1248 , Flag "i" (OptPrefix addImportPath ) Supported
1250 ------ Debugging ----------------------------------------------------
1251 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1253 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1255 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1257 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1259 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1261 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1263 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1265 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1267 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1269 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1271 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1273 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1275 , Flag "ddump-asm-regalloc-stages"
1276 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1278 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1280 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1282 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1284 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1286 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1288 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1290 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1292 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1294 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1296 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1298 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1300 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1302 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1304 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1306 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1308 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1310 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1312 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1314 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1316 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1318 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1320 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1322 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1324 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1326 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1328 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1330 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1332 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1334 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1336 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1338 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1340 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1342 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1344 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1346 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1348 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1350 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1352 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1354 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1356 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1358 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1360 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1362 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1365 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1367 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1369 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1371 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1373 , Flag "dshow-passes"
1374 (NoArg (do forceRecompile
1375 setVerbosity (Just 2)))
1377 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1380 ------ Machine dependant (-m<blah>) stuff ---------------------------
1382 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1384 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1386 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1389 ------ Warning opts -------------------------------------------------
1390 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1392 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1394 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1396 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1398 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1399 (Deprecated "Use -w instead")
1400 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1403 ------ Optimisation flags ------------------------------------------
1404 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1405 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1406 (Deprecated "Use -O0 instead")
1407 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1408 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1410 -- If the number is missing, use 1
1412 , Flag "fsimplifier-phases"
1413 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1415 , Flag "fmax-simplifier-iterations"
1416 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1419 , Flag "fspec-constr-threshold"
1420 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1422 , Flag "fno-spec-constr-threshold"
1423 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1425 , Flag "fspec-constr-count"
1426 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1428 , Flag "fno-spec-constr-count"
1429 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1431 , Flag "fliberate-case-threshold"
1432 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1434 , Flag "fno-liberate-case-threshold"
1435 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1438 , Flag "frule-check"
1439 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1441 , Flag "fcontext-stack"
1442 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1445 ------ DPH flags ----------------------------------------------------
1448 (NoArg (setDPHBackend DPHSeq))
1451 (NoArg (setDPHBackend DPHPar))
1454 (NoArg (setDPHBackend DPHThis))
1457 ------ Compiler flags -----------------------------------------------
1459 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1460 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1461 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1463 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1464 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1465 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1467 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1469 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1472 ++ map (mkFlag True "f" setDynFlag ) fFlags
1473 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1474 ++ map (mkFlag True "X" setDynFlag ) xFlags
1475 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1477 mkFlag :: Bool -- ^ True <=> it should be turned on
1478 -> String -- ^ The flag prefix
1479 -> (DynFlag -> DynP ())
1480 -> (String, DynFlag, Bool -> Deprecated)
1482 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1483 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1485 deprecatedForLanguage :: String -> Bool -> Deprecated
1486 deprecatedForLanguage lang turn_on
1487 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1489 flag | turn_on = lang
1490 | otherwise = "No"++lang
1492 useInstead :: String -> Bool -> Deprecated
1493 useInstead flag turn_on
1494 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1496 no = if turn_on then "" else "no-"
1498 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1499 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1501 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1502 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1503 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1504 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1505 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1506 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1507 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1508 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1509 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1510 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1511 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1512 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1513 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1514 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1515 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1516 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1517 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1518 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1519 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1520 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1521 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1522 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1523 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1524 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1525 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1526 ( "strictness", Opt_Strictness, const Supported ),
1527 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1528 ( "full-laziness", Opt_FullLaziness, const Supported ),
1529 ( "liberate-case", Opt_LiberateCase, const Supported ),
1530 ( "spec-constr", Opt_SpecConstr, const Supported ),
1531 ( "cse", Opt_CSE, const Supported ),
1532 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1533 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1534 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1535 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1536 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1537 ( "case-merge", Opt_CaseMerge, const Supported ),
1538 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1539 ( "method-sharing", Opt_MethodSharing, const Supported ),
1540 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1541 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1542 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1543 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1544 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1545 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1546 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1547 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1548 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1549 ( "break-on-error", Opt_BreakOnError, const Supported ),
1550 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1551 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1552 ( "run-cps", Opt_RunCPSZ, const Supported ),
1553 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1554 ( "vectorise", Opt_Vectorise, const Supported ),
1555 ( "regs-graph", Opt_RegsGraph, const Supported ),
1556 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1557 ( "th", Opt_TemplateHaskell,
1558 deprecatedForLanguage "TemplateHaskell" ),
1559 ( "fi", Opt_ForeignFunctionInterface,
1560 deprecatedForLanguage "ForeignFunctionInterface" ),
1561 ( "ffi", Opt_ForeignFunctionInterface,
1562 deprecatedForLanguage "ForeignFunctionInterface" ),
1563 ( "arrows", Opt_Arrows,
1564 deprecatedForLanguage "Arrows" ),
1565 ( "generics", Opt_Generics,
1566 deprecatedForLanguage "Generics" ),
1567 ( "implicit-prelude", Opt_ImplicitPrelude,
1568 deprecatedForLanguage "ImplicitPrelude" ),
1569 ( "bang-patterns", Opt_BangPatterns,
1570 deprecatedForLanguage "BangPatterns" ),
1571 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1572 deprecatedForLanguage "MonomorphismRestriction" ),
1573 ( "mono-pat-binds", Opt_MonoPatBinds,
1574 deprecatedForLanguage "MonoPatBinds" ),
1575 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1576 deprecatedForLanguage "ExtendedDefaultRules" ),
1577 ( "implicit-params", Opt_ImplicitParams,
1578 deprecatedForLanguage "ImplicitParams" ),
1579 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1580 deprecatedForLanguage "ScopedTypeVariables" ),
1582 deprecatedForLanguage "PArr" ),
1583 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1584 deprecatedForLanguage "OverlappingInstances" ),
1585 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1586 deprecatedForLanguage "UndecidableInstances" ),
1587 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1588 deprecatedForLanguage "IncoherentInstances" ),
1589 ( "gen-manifest", Opt_GenManifest, const Supported ),
1590 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1591 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1594 supportedLanguages :: [String]
1595 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1597 -- This may contain duplicates
1598 languageOptions :: [DynFlag]
1599 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1601 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1602 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1604 ( "CPP", Opt_Cpp, const Supported ),
1605 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1606 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1607 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1608 ( "MagicHash", Opt_MagicHash, const Supported ),
1609 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1610 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1611 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1612 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1613 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1614 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1615 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1616 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1617 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1618 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1619 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1620 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1621 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1622 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1623 ( "Arrows", Opt_Arrows, const Supported ),
1624 ( "PArr", Opt_PArr, const Supported ),
1625 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1626 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1627 ( "Generics", Opt_Generics, const Supported ),
1629 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1630 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1631 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1632 ( "RecordPuns", Opt_RecordPuns,
1633 deprecatedForLanguage "NamedFieldPuns" ),
1634 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1635 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1636 ( "GADTs", Opt_GADTs, const Supported ),
1637 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1638 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1639 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1641 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1642 -- On by default (which is not strictly H98):
1643 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1644 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1645 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1646 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1647 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1649 ( "PatternSignatures", Opt_ScopedTypeVariables,
1650 deprecatedForLanguage "ScopedTypeVariables" ),
1652 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1653 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1654 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1655 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1656 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1657 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1658 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1659 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1660 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1661 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1662 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1663 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1664 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1665 ( "PackageImports", Opt_PackageImports, const Supported ),
1666 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1669 impliedFlags :: [(DynFlag, DynFlag)]
1671 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1672 -- be completely rigid for GADTs
1674 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1675 -- Note [Scoped tyvars] in TcBinds
1678 glasgowExtsFlags :: [DynFlag]
1679 glasgowExtsFlags = [
1680 Opt_PrintExplicitForalls
1681 , Opt_ForeignFunctionInterface
1682 , Opt_UnliftedFFITypes
1684 , Opt_ImplicitParams
1685 , Opt_ScopedTypeVariables
1687 , Opt_TypeSynonymInstances
1688 , Opt_StandaloneDeriving
1689 , Opt_DeriveDataTypeable
1690 , Opt_FlexibleContexts
1691 , Opt_FlexibleInstances
1692 , Opt_ConstrainedClassMethods
1693 , Opt_MultiParamTypeClasses
1694 , Opt_FunctionalDependencies
1696 , Opt_PolymorphicComponents
1697 , Opt_ExistentialQuantification
1699 , Opt_PostfixOperators
1701 , Opt_LiberalTypeSynonyms
1703 , Opt_ImpredicativeTypes
1706 , Opt_ParallelListComp
1707 , Opt_EmptyDataDecls
1708 , Opt_KindSignatures
1709 , Opt_GeneralizedNewtypeDeriving
1710 , Opt_TypeFamilies ]
1712 -- -----------------------------------------------------------------------------
1713 -- Parsing the dynamic flags.
1715 -- | Parse dynamic flags from a list of command line argument. Returns the
1716 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1717 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1718 -- flags or missing arguments).
1719 parseDynamicFlags :: Monad m =>
1720 DynFlags -> [Located String]
1721 -> m (DynFlags, [Located String], [Located String])
1722 -- ^ Updated 'DynFlags', left-over arguments, and
1723 -- list of warnings.
1724 parseDynamicFlags dflags args = do
1725 -- XXX Legacy support code
1726 -- We used to accept things like
1727 -- optdep-f -optdepdepend
1728 -- optdep-f -optdep depend
1729 -- optdep -f -optdepdepend
1730 -- optdep -f -optdep depend
1731 -- but the spaces trip up proper argument handling. So get rid of them.
1732 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1733 f (x : xs) = x : f xs
1736 let ((leftover, errs, warns), dflags')
1737 = runCmdLine (processArgs dynamic_flags args') dflags
1738 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1739 return (dflags', leftover, warns)
1741 type DynP = CmdLineP DynFlags
1743 upd :: (DynFlags -> DynFlags) -> DynP ()
1745 dfs <- getCmdLineState
1746 putCmdLineState $! (f dfs)
1748 --------------------------
1749 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1750 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1751 ; mapM_ setDynFlag deps }
1753 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1754 -- When you set f, set the ones it implies
1755 -- NB: use setDynFlag recursively, in case the implied flags
1756 -- implies further flags
1757 -- When you un-set f, however, we don't un-set the things it implies
1758 -- (except for -fno-glasgow-exts, which is treated specially)
1760 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1762 --------------------------
1763 setDumpFlag :: DynFlag -> OptKind DynP
1764 setDumpFlag dump_flag
1765 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1767 -- Certain dumpy-things are really interested in what's going
1768 -- on during recompilation checking, so in those cases we
1769 -- don't want to turn it off.
1770 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1771 Opt_D_dump_hi_diffs]
1773 forceRecompile :: DynP ()
1774 -- Whenver we -ddump, force recompilation (by switching off the
1775 -- recompilation checker), else you don't see the dump! However,
1776 -- don't switch it off in --make mode, else *everything* gets
1777 -- recompiled which probably isn't what you want
1778 forceRecompile = do { dfs <- getCmdLineState
1779 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1781 force_recomp dfs = isOneShot (ghcMode dfs)
1783 setVerboseCore2Core :: DynP ()
1784 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1786 upd (\s -> s { shouldDumpSimplPhase = const True })
1788 setDumpSimplPhases :: String -> DynP ()
1789 setDumpSimplPhases s = do forceRecompile
1790 upd (\s -> s { shouldDumpSimplPhase = spec })
1792 spec :: SimplifierMode -> Bool
1794 . map (join (&&) . map match . split ':')
1800 join :: (Bool -> Bool -> Bool)
1801 -> [SimplifierMode -> Bool]
1802 -> SimplifierMode -> Bool
1803 join _ [] = const True
1804 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1806 match :: String -> SimplifierMode -> Bool
1807 match "" = const True
1808 match s = case reads s of
1809 [(n,"")] -> phase_num n
1812 phase_num :: Int -> SimplifierMode -> Bool
1813 phase_num n (SimplPhase k _) = n == k
1814 phase_num _ _ = False
1816 phase_name :: String -> SimplifierMode -> Bool
1817 phase_name s SimplGently = s == "gentle"
1818 phase_name s (SimplPhase _ ss) = s `elem` ss
1820 setVerbosity :: Maybe Int -> DynP ()
1821 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1823 addCmdlineHCInclude :: String -> DynP ()
1824 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1826 extraPkgConf_ :: FilePath -> DynP ()
1827 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1829 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1831 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1833 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1835 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1837 setPackageName :: String -> DynFlags -> DynFlags
1839 | Nothing <- unpackPackageId pid
1840 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1842 = \s -> s{ thisPackage = pid }
1844 pid = stringToPackageId p
1846 -- If we're linking a binary, then only targets that produce object
1847 -- code are allowed (requests for other target types are ignored).
1848 setTarget :: HscTarget -> DynP ()
1849 setTarget l = upd set
1852 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1855 -- Changes the target only if we're compiling object code. This is
1856 -- used by -fasm and -fvia-C, which switch from one to the other, but
1857 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1858 -- can be safely used in an OPTIONS_GHC pragma.
1859 setObjTarget :: HscTarget -> DynP ()
1860 setObjTarget l = upd set
1863 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1866 setOptLevel :: Int -> DynFlags -> DynFlags
1867 setOptLevel n dflags
1868 | hscTarget dflags == HscInterpreted && n > 0
1870 -- not in IO any more, oh well:
1871 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1873 = updOptLevel n dflags
1876 -- -Odph is equivalent to
1878 -- -O2 optimise as much as possible
1879 -- -fno-method-sharing sharing specialisation defeats fusion
1881 -- -fdicts-cheap always inline dictionaries
1882 -- -fmax-simplifier-iterations20 this is necessary sometimes
1883 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1884 -- -fno-spec-constr-count SpecConstr as much as possible
1886 setDPHOpt :: DynFlags -> DynFlags
1887 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1888 , specConstrThreshold = Nothing
1889 , specConstrCount = Nothing
1891 `dopt_set` Opt_DictsCheap
1892 `dopt_unset` Opt_MethodSharing
1894 data DPHBackend = DPHPar
1897 deriving(Eq, Ord, Enum, Show)
1899 setDPHBackend :: DPHBackend -> DynP ()
1900 setDPHBackend backend
1902 upd $ \dflags -> dflags { dphBackend = backend }
1903 mapM_ exposePackage (dph_packages backend)
1905 dph_packages DPHThis = []
1906 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1907 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1909 dphPackage :: DynFlags -> PackageId
1910 dphPackage dflags = case dphBackend dflags of
1911 DPHPar -> dphParPackageId
1912 DPHSeq -> dphSeqPackageId
1913 DPHThis -> thisPackage dflags
1915 setMainIs :: String -> DynP ()
1917 | not (null main_fn) && isLower (head main_fn)
1918 -- The arg looked like "Foo.Bar.baz"
1919 = upd $ \d -> d{ mainFunIs = Just main_fn,
1920 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1922 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1923 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1925 | otherwise -- The arg looked like "baz"
1926 = upd $ \d -> d{ mainFunIs = Just arg }
1928 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1930 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1931 -- Either returns the default name or the one configured on the command line with -main-is
1932 getMainFun :: DynFlags -> RdrName
1933 getMainFun dflags = case (mainFunIs dflags) of
1934 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1935 Nothing -> main_RDR_Unqual
1937 -----------------------------------------------------------------------------
1938 -- Paths & Libraries
1940 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1942 -- -i on its own deletes the import paths
1943 addImportPath "" = upd (\s -> s{importPaths = []})
1944 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1948 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1951 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1953 addFrameworkPath p =
1954 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1956 #ifndef mingw32_TARGET_OS
1957 split_marker :: Char
1958 split_marker = ':' -- not configurable (ToDo)
1961 splitPathList :: String -> [String]
1962 splitPathList s = filter notNull (splitUp s)
1963 -- empty paths are ignored: there might be a trailing
1964 -- ':' in the initial list, for example. Empty paths can
1965 -- cause confusion when they are translated into -I options
1966 -- for passing to gcc.
1968 #ifndef mingw32_TARGET_OS
1969 splitUp xs = split split_marker xs
1971 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1973 -- That is, if "foo:bar:baz" is used, this interpreted as
1974 -- consisting of three entries, 'foo', 'bar', 'baz'.
1975 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1976 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1978 -- Notice that no attempt is made to fully replace the 'standard'
1979 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1980 -- that this will cause too much breakage for users & ':' will
1981 -- work fine even with DOS paths, if you're not insisting on being silly.
1984 splitUp (x:':':div:xs) | div `elem` dir_markers
1985 = ((x:':':div:p): splitUp rs)
1987 (p,rs) = findNextPath xs
1988 -- we used to check for existence of the path here, but that
1989 -- required the IO monad to be threaded through the command-line
1990 -- parser which is quite inconvenient. The
1991 splitUp xs = cons p (splitUp rs)
1993 (p,rs) = findNextPath xs
1998 -- will be called either when we've consumed nought or the
1999 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2000 -- finding the next split marker.
2002 case break (`elem` split_markers) xs of
2003 (p, _:ds) -> (p, ds)
2006 split_markers :: [Char]
2007 split_markers = [':', ';']
2009 dir_markers :: [Char]
2010 dir_markers = ['/', '\\']
2013 -- -----------------------------------------------------------------------------
2014 -- tmpDir, where we store temporary files.
2016 setTmpDir :: FilePath -> DynFlags -> DynFlags
2017 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2018 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2019 -- seem necessary now --SDM 7/2/2008
2021 -----------------------------------------------------------------------------
2024 setOptHpcDir :: String -> DynP ()
2025 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2027 -----------------------------------------------------------------------------
2028 -- Via-C compilation stuff
2030 -- There are some options that we need to pass to gcc when compiling
2031 -- Haskell code via C, but are only supported by recent versions of
2032 -- gcc. The configure script decides which of these options we need,
2033 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2034 -- read before each via-C compilation. The advantage of having these
2035 -- in a separate file is that the file can be created at install-time
2036 -- depending on the available gcc version, and even re-generated later
2037 -- if gcc is upgraded.
2039 -- The options below are not dependent on the version of gcc, only the
2042 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2043 [String]) -- for registerised HC compilations
2044 machdepCCOpts _dflags
2045 #if alpha_TARGET_ARCH
2047 #ifdef HAVE_THREADED_RTS_SUPPORT
2051 -- For now, to suppress the gcc warning "call-clobbered
2052 -- register used for global register variable", we simply
2053 -- disable all warnings altogether using the -w flag. Oh well.
2055 #elif hppa_TARGET_ARCH
2056 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2057 -- (very nice, but too bad the HP /usr/include files don't agree.)
2058 = ( ["-D_HPUX_SOURCE"], [] )
2060 #elif m68k_TARGET_ARCH
2061 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2062 -- popping of args to routines to be explicit; if we let things
2063 -- be deferred 'til after an STGJUMP, imminent death is certain!
2065 -- -fomit-frame-pointer : *don't*
2066 -- It's better to have a6 completely tied up being a frame pointer
2067 -- rather than let GCC pick random things to do with it.
2068 -- (If we want to steal a6, then we would try to do things
2069 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2070 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2072 #elif i386_TARGET_ARCH
2073 -- -fno-defer-pop : basically the same game as for m68k
2075 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2076 -- the fp (%ebp) for our register maps.
2077 = let n_regs = stolen_x86_regs _dflags
2080 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2083 "-fomit-frame-pointer",
2084 -- we want -fno-builtin, because when gcc inlines
2085 -- built-in functions like memcpy() it tends to
2086 -- run out of registers, requiring -monly-n-regs
2088 "-DSTOLEN_X86_REGS="++show n_regs ]
2091 #elif ia64_TARGET_ARCH
2092 = ( [], ["-fomit-frame-pointer", "-G0"] )
2094 #elif x86_64_TARGET_ARCH
2095 = ( [], ["-fomit-frame-pointer",
2096 "-fno-asynchronous-unwind-tables",
2097 -- the unwind tables are unnecessary for HC code,
2098 -- and get in the way of -split-objs. Another option
2099 -- would be to throw them away in the mangler, but this
2102 -- calling builtins like strlen() using the FFI can
2103 -- cause gcc to run out of regs, so use the external
2107 #elif sparc_TARGET_ARCH
2109 -- For now, to suppress the gcc warning "call-clobbered
2110 -- register used for global register variable", we simply
2111 -- disable all warnings altogether using the -w flag. Oh well.
2113 #elif powerpc_apple_darwin_TARGET
2115 -- Disable Apple's precompiling preprocessor. It's a great thing
2116 -- for "normal" programs, but it doesn't support register variable
2118 = ( [], ["-no-cpp-precomp"] )
2123 picCCOpts :: DynFlags -> [String]
2125 #if darwin_TARGET_OS
2126 -- Apple prefers to do things the other way round.
2127 -- PIC is on by default.
2128 -- -mdynamic-no-pic:
2129 -- Turn off PIC code generation.
2131 -- Don't generate "common" symbols - these are unwanted
2132 -- in dynamic libraries.
2135 = ["-fno-common", "-D__PIC__"]
2137 = ["-mdynamic-no-pic"]
2138 #elif mingw32_TARGET_OS
2139 -- no -fPIC for Windows
2146 = ["-fPIC", "-D__PIC__"]
2151 -- -----------------------------------------------------------------------------
2155 can_split = cSplitObjs == "YES"
2157 -- -----------------------------------------------------------------------------
2160 compilerInfo :: [(String, String)]
2161 compilerInfo = [("Project name", cProjectName),
2162 ("Project version", cProjectVersion),
2163 ("Booter version", cBooterVersion),
2165 ("Interface file version", cHscIfaceFileVersion),
2166 ("Have interpreter", cGhcWithInterpreter),
2167 ("Object splitting", cSplitObjs),
2168 ("Have native code generator", cGhcWithNativeCodeGen),
2169 ("Support SMP", cGhcWithSMP),
2170 ("Unregisterised", cGhcUnregisterised),
2171 ("Tables next to code", cGhcEnableTablesNextToCode),
2172 ("Win32 DLLs", cEnableWin32DLLs),
2173 ("RTS ways", cGhcRTSWays),
2174 ("Leading underscore", cLeadingUnderscore),
2175 ("Debug on", show debugIsOn)