{-# OPTIONS -fno-warn-missing-fields #-} {-# OPTIONS -w #-} -- The above warning supression flag is a temporary kludge. -- While working on this module you are encouraged to remove it and fix -- any warnings in the module. See -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings -- for details ----------------------------------------------------------------------------- -- -- Dynamic flags -- -- Most flags are dynamic flags, which means they can change from -- compilation to compilation using OPTIONS_GHC pragmas, and in a -- multi-session GHC each session can be using different dynamic -- flags. Dynamic flags can also be set at the prompt in GHCi. -- -- (c) The University of Glasgow 2005 -- ----------------------------------------------------------------------------- module DynFlags ( -- Dynamic flags DynFlag(..), DynFlags(..), HscTarget(..), isObjectTarget, defaultObjectTarget, GhcMode(..), isOneShot, GhcLink(..), isNoLink, PackageFlag(..), Option(..), -- Configuration of the core-to-core and stg-to-stg phases CoreToDo(..), StgToDo(..), SimplifierSwitch(..), SimplifierMode(..), FloatOutSwitches(..), getCoreToDo, getStgToDo, -- Manipulating DynFlags defaultDynFlags, -- DynFlags initDynFlags, -- DynFlags -> IO DynFlags dopt, -- DynFlag -> DynFlags -> Bool dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags getOpts, -- (DynFlags -> [a]) -> IO [a] getVerbFlag, updOptLevel, setTmpDir, setPackageName, -- parsing DynFlags parseDynamicFlags, allFlags, -- misc stuff machdepCCOpts, picCCOpts, supportedLanguages, compilerInfo, ) where #include "HsVersions.h" import Module import PackageConfig import PrelNames ( mAIN ) #ifdef i386_TARGET_ARCH import StaticFlags ( opt_Static ) #endif import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag ) import {-# SOURCE #-} Packages (PackageState) import DriverPhases ( Phase(..), phaseInputExt ) import Config import CmdLineParser import Constants ( mAX_CONTEXT_REDUCTION_DEPTH ) import Panic ( panic, GhcException(..) ) import UniqFM ( UniqFM ) import Util import Maybes ( orElse, fromJust ) import SrcLoc ( SrcSpan ) import Outputable import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage ) import Data.IORef ( readIORef ) import Control.Exception ( throwDyn ) import Control.Monad ( when ) #ifdef mingw32_TARGET_OS import Data.List ( isPrefixOf ) #else import Util ( split ) #endif import Data.Char import System.IO ( hPutStrLn, stderr ) -- ----------------------------------------------------------------------------- -- DynFlags data DynFlag -- debugging flags = Opt_D_dump_cmm | Opt_D_dump_cmmz | Opt_D_dump_cmmz_pretty | Opt_D_dump_cps_cmm | Opt_D_dump_cvt_cmm | Opt_D_dump_asm | Opt_D_dump_asm_native | Opt_D_dump_asm_liveness | Opt_D_dump_asm_coalesce | Opt_D_dump_asm_regalloc | Opt_D_dump_asm_regalloc_stages | Opt_D_dump_asm_conflicts | Opt_D_dump_asm_stats | Opt_D_dump_cpranal | Opt_D_dump_deriv | Opt_D_dump_ds | Opt_D_dump_flatC | Opt_D_dump_foreign | Opt_D_dump_inlinings | Opt_D_dump_rule_firings | Opt_D_dump_occur_anal | Opt_D_dump_parsed | Opt_D_dump_rn | Opt_D_dump_simpl | Opt_D_dump_simpl_iterations | Opt_D_dump_spec | Opt_D_dump_prep | Opt_D_dump_stg | Opt_D_dump_stranal | Opt_D_dump_tc | Opt_D_dump_types | Opt_D_dump_rules | Opt_D_dump_cse | Opt_D_dump_worker_wrapper | Opt_D_dump_rn_trace | Opt_D_dump_rn_stats | Opt_D_dump_opt_cmm | Opt_D_dump_simpl_stats | Opt_D_dump_tc_trace | Opt_D_dump_if_trace | Opt_D_dump_splices | Opt_D_dump_BCOs | Opt_D_dump_vect | Opt_D_dump_hpc | Opt_D_source_stats | Opt_D_verbose_core2core | Opt_D_verbose_stg2stg | Opt_D_dump_hi | Opt_D_dump_hi_diffs | Opt_D_dump_minimal_imports | Opt_D_dump_mod_cycles | Opt_D_faststring_stats | Opt_DumpToFile -- ^ Append dump output to files instead of stdout. | Opt_DoCoreLinting | Opt_DoStgLinting | Opt_DoCmmLinting | Opt_DoAsmLinting | Opt_WarnIsError -- -Werror; makes warnings fatal | Opt_WarnDuplicateExports | Opt_WarnHiShadows | Opt_WarnImplicitPrelude | Opt_WarnIncompletePatterns | Opt_WarnIncompletePatternsRecUpd | Opt_WarnMissingFields | Opt_WarnMissingMethods | Opt_WarnMissingSigs | Opt_WarnNameShadowing | Opt_WarnOverlappingPatterns | Opt_WarnSimplePatterns | Opt_WarnTypeDefaults | Opt_WarnMonomorphism | Opt_WarnUnusedBinds | Opt_WarnUnusedImports | Opt_WarnUnusedMatches | Opt_WarnDeprecations | Opt_WarnDodgyImports | Opt_WarnOrphans | Opt_WarnTabs -- language opts | Opt_OverlappingInstances | Opt_UndecidableInstances | Opt_IncoherentInstances | Opt_MonomorphismRestriction | Opt_MonoPatBinds | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting | Opt_ForeignFunctionInterface | Opt_UnliftedFFITypes | Opt_PArr -- Syntactic support for parallel arrays | Opt_Arrows -- Arrow-notation syntax | Opt_TemplateHaskell | Opt_ImplicitParams | Opt_Generics | Opt_ImplicitPrelude | Opt_ScopedTypeVariables | Opt_UnboxedTuples | Opt_BangPatterns | Opt_TypeFamilies | Opt_OverloadedStrings | Opt_DisambiguateRecordFields | Opt_RecordWildCards | Opt_RecordPuns | Opt_GADTs | Opt_RelaxedPolyRec | Opt_StandaloneDeriving | Opt_DeriveDataTypeable | Opt_TypeSynonymInstances | Opt_FlexibleContexts | Opt_FlexibleInstances | Opt_ConstrainedClassMethods | Opt_MultiParamTypeClasses | Opt_FunctionalDependencies | Opt_UnicodeSyntax | Opt_PolymorphicComponents | Opt_ExistentialQuantification | Opt_MagicHash | Opt_EmptyDataDecls | Opt_KindSignatures | Opt_PatternSignatures | Opt_ParallelListComp | Opt_GeneralizedNewtypeDeriving | Opt_RecursiveDo | Opt_PatternGuards | Opt_LiberalTypeSynonyms | Opt_Rank2Types | Opt_RankNTypes | Opt_TypeOperators | Opt_PrintExplicitForalls -- optimisation opts | Opt_Strictness | Opt_FullLaziness | Opt_CSE | Opt_LiberateCase | Opt_SpecConstr | Opt_IgnoreInterfacePragmas | Opt_OmitInterfacePragmas | Opt_DoLambdaEtaExpansion | Opt_IgnoreAsserts | Opt_IgnoreBreakpoints | Opt_DoEtaReduction | Opt_CaseMerge | Opt_UnboxStrictFields | Opt_DictsCheap | Opt_RewriteRules | Opt_Vectorise | Opt_RegsGraph -- do graph coloring register allocation | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation -- misc opts | Opt_Cpp | Opt_Pp | Opt_ForceRecomp | Opt_DryRun | Opt_DoAsmMangling | Opt_ExcessPrecision | Opt_ReadUserPackageConf | Opt_NoHsMain | Opt_SplitObjs | Opt_StgStats | Opt_HideAllPackages | Opt_PrintBindResult | Opt_Haddock | Opt_Hpc_No_Auto | Opt_BreakOnException | Opt_BreakOnError | Opt_PrintEvldWithShow | Opt_GenManifest | Opt_EmbedManifest | Opt_RunCPSZ | Opt_ConvertToZipCfgAndBack -- keeping stuff | Opt_KeepHiDiffs | Opt_KeepHcFiles | Opt_KeepSFiles | Opt_KeepRawSFiles | Opt_KeepTmpFiles deriving (Eq, Show) data DynFlags = DynFlags { ghcMode :: GhcMode, ghcLink :: GhcLink, coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile stgToDo :: Maybe [StgToDo], -- similarly hscTarget :: HscTarget, hscOutName :: String, -- name of the output file extCoreName :: String, -- name of the .core output file verbosity :: Int, -- verbosity level optLevel :: Int, -- optimisation level maxSimplIterations :: Int, -- max simplifier iterations ruleCheck :: Maybe String, specThreshold :: Int, -- Threshold for function specialisation stolen_x86_regs :: Int, cmdlineHcIncludes :: [String], -- -#includes importPaths :: [FilePath], mainModIs :: Module, mainFunIs :: Maybe String, ctxtStkDepth :: Int, -- Typechecker context stack depth thisPackage :: PackageId, -- ways wayNames :: [WayName], -- way flags from the cmd line buildTag :: String, -- the global "way" (eg. "p" for prof) rtsBuildTag :: String, -- the RTS "way" -- paths etc. objectDir :: Maybe String, hiDir :: Maybe String, stubDir :: Maybe String, objectSuf :: String, hcSuf :: String, hiSuf :: String, outputFile :: Maybe String, outputHi :: Maybe String, -- | This is set by DriverPipeline.runPipeline based on where -- its output is going. dumpPrefix :: Maybe FilePath, -- | Override the dumpPrefix set by runPipeline. -- Set by -ddump-file-prefix dumpPrefixForce :: Maybe FilePath, includePaths :: [String], libraryPaths :: [String], frameworkPaths :: [String], -- used on darwin only cmdlineFrameworks :: [String], -- ditto tmpDir :: String, -- no trailing '/' ghcUsagePath :: FilePath, -- Filled in by SysTools ghciUsagePath :: FilePath, -- ditto hpcDir :: String, -- ^ path to store the .mix files -- options for particular phases opt_L :: [String], opt_P :: [String], opt_F :: [String], opt_c :: [String], opt_m :: [String], opt_a :: [String], opt_l :: [String], opt_dep :: [String], opt_windres :: [String], -- commands for particular phases pgm_L :: String, pgm_P :: (String,[Option]), pgm_F :: String, pgm_c :: (String,[Option]), pgm_m :: (String,[Option]), pgm_s :: (String,[Option]), pgm_a :: (String,[Option]), pgm_l :: (String,[Option]), pgm_dll :: (String,[Option]), pgm_T :: String, pgm_sysman :: String, pgm_windres :: String, -- Package flags extraPkgConfs :: [FilePath], topDir :: FilePath, -- filled in by SysTools systemPackageConfig :: FilePath, -- ditto -- The -package-conf flags given on the command line, in the order -- they appeared. packageFlags :: [PackageFlag], -- The -package and -hide-package flags from the command-line -- Package state -- NB. do not modify this field, it is calculated by -- Packages.initPackages and Packages.updatePackages. pkgDatabase :: Maybe (UniqFM PackageConfig), pkgState :: PackageState, -- hsc dynamic flags flags :: [DynFlag], -- message output log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO () } data HscTarget = HscC | HscAsm | HscJava | HscInterpreted | HscNothing deriving (Eq, Show) -- | will this target result in an object file on the disk? isObjectTarget :: HscTarget -> Bool isObjectTarget HscC = True isObjectTarget HscAsm = True isObjectTarget _ = False -- | The 'GhcMode' tells us whether we're doing multi-module -- compilation (controlled via the "GHC" API) or one-shot -- (single-module) compilation. This makes a difference primarily to -- the "Finder": in one-shot mode we look for interface files for -- imported modules, but in multi-module mode we look for source files -- in order to check whether they need to be recompiled. data GhcMode = CompManager -- ^ --make, GHCi, etc. | OneShot -- ^ ghc -c Foo.hs | MkDepend -- ^ ghc -M, see Finder for why we need this deriving Eq isOneShot :: GhcMode -> Bool isOneShot OneShot = True isOneShot _other = False -- | What kind of linking to do. data GhcLink -- What to do in the link step, if there is one = NoLink -- Don't link at all | LinkBinary -- Link object code into a binary | LinkInMemory -- Use the in-memory dynamic linker | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms) deriving Eq isNoLink :: GhcLink -> Bool isNoLink NoLink = True isNoLink other = False data PackageFlag = ExposePackage String | HidePackage String | IgnorePackage String deriving Eq defaultHscTarget = defaultObjectTarget -- | the 'HscTarget' value corresponding to the default way to create -- object files on the current platform. defaultObjectTarget | cGhcWithNativeCodeGen == "YES" = HscAsm | otherwise = HscC initDynFlags dflags = do -- someday these will be dynamic flags ways <- readIORef v_Ways build_tag <- readIORef v_Build_tag rts_build_tag <- readIORef v_RTS_Build_tag return dflags{ wayNames = ways, buildTag = build_tag, rtsBuildTag = rts_build_tag } defaultDynFlags = DynFlags { ghcMode = CompManager, ghcLink = LinkBinary, coreToDo = Nothing, stgToDo = Nothing, hscTarget = defaultHscTarget, hscOutName = "", extCoreName = "", verbosity = 0, optLevel = 0, maxSimplIterations = 4, ruleCheck = Nothing, specThreshold = 200, stolen_x86_regs = 4, cmdlineHcIncludes = [], importPaths = ["."], mainModIs = mAIN, mainFunIs = Nothing, ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH, thisPackage = mainPackageId, objectDir = Nothing, hiDir = Nothing, stubDir = Nothing, objectSuf = phaseInputExt StopLn, hcSuf = phaseInputExt HCc, hiSuf = "hi", outputFile = Nothing, outputHi = Nothing, dumpPrefix = Nothing, dumpPrefixForce = Nothing, includePaths = [], libraryPaths = [], frameworkPaths = [], cmdlineFrameworks = [], tmpDir = cDEFAULT_TMPDIR, hpcDir = ".hpc", opt_L = [], opt_P = (if opt_PIC then ["-D__PIC__"] else []), opt_F = [], opt_c = [], opt_a = [], opt_m = [], opt_l = [], opt_dep = [], opt_windres = [], extraPkgConfs = [], packageFlags = [], pkgDatabase = Nothing, pkgState = panic "no package state yet: call GHC.setSessionDynFlags", flags = [ Opt_ReadUserPackageConf, Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard -- behaviour the default, to see if anyone notices -- SLPJ July 06 Opt_ImplicitPrelude, Opt_MonomorphismRestriction, Opt_DoAsmMangling, Opt_GenManifest, Opt_EmbedManifest, -- on by default: Opt_PrintBindResult ] ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns] -- The default -O0 options ++ standardWarnings, log_action = \severity srcSpan style msg -> case severity of SevInfo -> hPutStrLn stderr (show (msg style)) SevFatal -> hPutStrLn stderr (show (msg style)) _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style)) } {- Verbosity levels: 0 | print errors & warnings only 1 | minimal verbosity: print "compiling M ... done." for each module. 2 | equivalent to -dshow-passes 3 | equivalent to existing "ghc -v" 4 | "ghc -v -ddump-most" 5 | "ghc -v -ddump-all" -} dopt :: DynFlag -> DynFlags -> Bool dopt f dflags = f `elem` (flags dflags) dopt_set :: DynFlags -> DynFlag -> DynFlags dopt_set dfs f = dfs{ flags = f : flags dfs } dopt_unset :: DynFlags -> DynFlag -> DynFlags dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) } getOpts :: DynFlags -> (DynFlags -> [a]) -> [a] getOpts dflags opts = reverse (opts dflags) -- We add to the options from the front, so we need to reverse the list getVerbFlag :: DynFlags -> String getVerbFlag dflags | verbosity dflags >= 3 = "-v" | otherwise = "" setObjectDir f d = d{ objectDir = Just f} setHiDir f d = d{ hiDir = Just f} setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d } -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file -- #included from the .hc file when compiling with -fvia-C. setObjectSuf f d = d{ objectSuf = f} setHiSuf f d = d{ hiSuf = f} setHcSuf f d = d{ hcSuf = f} setOutputFile f d = d{ outputFile = f} setOutputHi f d = d{ outputHi = f} setDumpPrefixForce f d = d { dumpPrefixForce = f} -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"] -- Config.hs should really use Option. setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)} setPgmL f d = d{ pgm_L = f} setPgmF f d = d{ pgm_F = f} setPgmc f d = d{ pgm_c = (f,[])} setPgmm f d = d{ pgm_m = (f,[])} setPgms f d = d{ pgm_s = (f,[])} setPgma f d = d{ pgm_a = (f,[])} setPgml f d = d{ pgm_l = (f,[])} setPgmdll f d = d{ pgm_dll = (f,[])} setPgmwindres f d = d{ pgm_windres = f} addOptL f d = d{ opt_L = f : opt_L d} addOptP f d = d{ opt_P = f : opt_P d} addOptF f d = d{ opt_F = f : opt_F d} addOptc f d = d{ opt_c = f : opt_c d} addOptm f d = d{ opt_m = f : opt_m d} addOpta f d = d{ opt_a = f : opt_a d} addOptl f d = d{ opt_l = f : opt_l d} addOptdep f d = d{ opt_dep = f : opt_dep d} addOptwindres f d = d{ opt_windres = f : opt_windres d} addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d} -- ----------------------------------------------------------------------------- -- Command-line options -- When invoking external tools as part of the compilation pipeline, we -- pass these a sequence of options on the command-line. Rather than -- just using a list of Strings, we use a type that allows us to distinguish -- between filepaths and 'other stuff'. [The reason being, of course, that -- this type gives us a handle on transforming filenames, and filenames only, -- to whatever format they're expected to be on a particular platform.] data Option = FileOption -- an entry that _contains_ filename(s) / filepaths. String -- a non-filepath prefix that shouldn't be -- transformed (e.g., "/out=") String -- the filepath/filename portion | Option String ----------------------------------------------------------------------------- -- Setting the optimisation level updOptLevel :: Int -> DynFlags -> DynFlags -- Set dynflags appropriate to the optimisation level updOptLevel n dfs = dfs2{ optLevel = final_n } where final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2 dfs1 = foldr (flip dopt_unset) dfs remove_dopts dfs2 = foldr (flip dopt_set) dfs1 extra_dopts extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ] remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ] optLevelFlags :: [([Int], DynFlag)] optLevelFlags = [ ([0], Opt_IgnoreInterfacePragmas) , ([0], Opt_OmitInterfacePragmas) , ([1,2], Opt_IgnoreAsserts) , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules] -- in PrelRules , ([1,2], Opt_DoEtaReduction) , ([1,2], Opt_CaseMerge) , ([1,2], Opt_Strictness) , ([1,2], Opt_CSE) , ([1,2], Opt_FullLaziness) , ([2], Opt_LiberateCase) , ([2], Opt_SpecConstr) , ([0,1,2], Opt_DoLambdaEtaExpansion) -- This one is important for a tiresome reason: -- we want to make sure that the bindings for data -- constructors are eta-expanded. This is probably -- a good thing anyway, but it seems fragile. ] -- ----------------------------------------------------------------------------- -- Standard sets of warning options standardWarnings = [ Opt_WarnDeprecations, Opt_WarnOverlappingPatterns, Opt_WarnMissingFields, Opt_WarnMissingMethods, Opt_WarnDuplicateExports ] minusWOpts = standardWarnings ++ [ Opt_WarnUnusedBinds, Opt_WarnUnusedMatches, Opt_WarnUnusedImports, Opt_WarnIncompletePatterns, Opt_WarnDodgyImports ] minusWallOpts = minusWOpts ++ [ Opt_WarnTypeDefaults, Opt_WarnNameShadowing, Opt_WarnMissingSigs, Opt_WarnHiShadows, Opt_WarnOrphans ] -- minuswRemovesOpts should be every warning option minuswRemovesOpts = minusWallOpts ++ [Opt_WarnImplicitPrelude, Opt_WarnIncompletePatternsRecUpd, Opt_WarnSimplePatterns, Opt_WarnMonomorphism, Opt_WarnTabs ] -- ----------------------------------------------------------------------------- -- CoreToDo: abstraction of core-to-core passes to run. data CoreToDo -- These are diff core-to-core passes, -- which may be invoked in any order, -- as many times as you like. = CoreDoSimplify -- The core-to-core simplifier. SimplifierMode [SimplifierSwitch] -- Each run of the simplifier can take a different -- set of simplifier-specific flags. | CoreDoFloatInwards | CoreDoFloatOutwards FloatOutSwitches | CoreLiberateCase | CoreDoPrintCore | CoreDoStaticArgs | CoreDoStrictness | CoreDoWorkerWrapper | CoreDoSpecialising | CoreDoSpecConstr | CoreDoOldStrictness | CoreDoGlomBinds | CoreCSE | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules -- matching this string | CoreDoVectorisation | CoreDoNothing -- Useful when building up | CoreDoPasses [CoreToDo] -- lists of these things data SimplifierMode -- See comments in SimplMonad = SimplGently | SimplPhase Int data SimplifierSwitch = MaxSimplifierIterations Int | NoCaseOfCase data FloatOutSwitches = FloatOutSw Bool -- True <=> float lambdas to top level Bool -- True <=> float constants to top level, -- even if they do not escape a lambda -- The core-to-core pass ordering is derived from the DynFlags: runWhen :: Bool -> CoreToDo -> CoreToDo runWhen True do_this = do_this runWhen False do_this = CoreDoNothing getCoreToDo :: DynFlags -> [CoreToDo] getCoreToDo dflags | Just todo <- coreToDo dflags = todo -- set explicitly by user | otherwise = core_todo where opt_level = optLevel dflags max_iter = maxSimplIterations dflags strictness = dopt Opt_Strictness dflags full_laziness = dopt Opt_FullLaziness dflags cse = dopt Opt_CSE dflags spec_constr = dopt Opt_SpecConstr dflags liberate_case = dopt Opt_LiberateCase dflags rule_check = ruleCheck dflags vectorisation = dopt Opt_Vectorise dflags core_todo = if opt_level == 0 then [ CoreDoSimplify (SimplPhase 0) [ MaxSimplifierIterations max_iter ] ] else {- opt_level >= 1 -} [ -- initial simplify: mk specialiser happy: minimum effort please CoreDoSimplify SimplGently [ -- Simplify "gently" -- Don't inline anything till full laziness has bitten -- In particular, inlining wrappers inhibits floating -- e.g. ...(case f x of ...)... -- ==> ...(case (case x of I# x# -> fw x#) of ...)... -- ==> ...(case x of I# x# -> case fw x# of ...)... -- and now the redex (f x) isn't floatable any more -- Similarly, don't apply any rules until after full -- laziness. Notably, list fusion can prevent floating. NoCaseOfCase, -- Don't do case-of-case transformations. -- This makes full laziness work better MaxSimplifierIterations max_iter ], -- We run vectorisation here for now, but we might also try to run -- it later runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, CoreDoSimplify SimplGently [NoCaseOfCase, MaxSimplifierIterations max_iter]]), -- Specialisation is best done before full laziness -- so that overloaded functions have all their dictionary lambdas manifest CoreDoSpecialising, runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)), CoreDoFloatInwards, CoreDoSimplify (SimplPhase 2) [ -- Want to run with inline phase 2 after the specialiser to give -- maximum chance for fusion to work before we inline build/augment -- in phase 1. This made a difference in 'ansi' where an -- overloaded function wasn't inlined till too late. MaxSimplifierIterations max_iter ], case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing }, CoreDoSimplify (SimplPhase 1) [ -- Need inline-phase2 here so that build/augment get -- inlined. I found that spectral/hartel/genfft lost some useful -- strictness in the function sumcode' if augment is not inlined -- before strictness analysis runs MaxSimplifierIterations max_iter ], case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing }, CoreDoSimplify (SimplPhase 0) [ -- Phase 0: allow all Ids to be inlined now -- This gets foldr inlined before strictness analysis MaxSimplifierIterations 3 -- At least 3 iterations because otherwise we land up with -- huge dead expressions because of an infelicity in the -- simpifier. -- let k = BIG in foldr k z xs -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs -- Don't stop now! ], case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing }, #ifdef OLD_STRICTNESS CoreDoOldStrictness, #endif runWhen strictness (CoreDoPasses [ CoreDoStrictness, CoreDoWorkerWrapper, CoreDoGlomBinds, CoreDoSimplify (SimplPhase 0) [ MaxSimplifierIterations max_iter ]]), runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas True)), -- Float constants -- nofib/spectral/hartel/wang doubles in speed if you -- do full laziness late in the day. It only happens -- after fusion and other stuff, so the early pass doesn't -- catch it. For the record, the redex is -- f_el22 (f_el21 r_midblock) runWhen cse CoreCSE, -- We want CSE to follow the final full-laziness pass, because it may -- succeed in commoning up things floated out by full laziness. -- CSE used to rely on the no-shadowing invariant, but it doesn't any more CoreDoFloatInwards, case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing }, -- Case-liberation for -O2. This should be after -- strictness analysis and the simplification which follows it. runWhen liberate_case (CoreDoPasses [ CoreLiberateCase, CoreDoSimplify (SimplPhase 0) [ MaxSimplifierIterations max_iter ] ]), -- Run the simplifier after LiberateCase to vastly -- reduce the possiblility of shadowing -- Reason: see Note [Shadowing] in SpecConstr.lhs runWhen spec_constr CoreDoSpecConstr, -- Final clean-up simplification: CoreDoSimplify (SimplPhase 0) [ MaxSimplifierIterations max_iter ] ] -- ----------------------------------------------------------------------------- -- StgToDo: abstraction of stg-to-stg passes to run. data StgToDo = StgDoMassageForProfiling -- should be (next to) last -- There's also setStgVarInfo, but its absolute "lastness" -- is so critical that it is hardwired in (no flag). | D_stg_stats getStgToDo :: DynFlags -> [StgToDo] getStgToDo dflags | Just todo <- stgToDo dflags = todo -- set explicitly by user | otherwise = todo2 where stg_stats = dopt Opt_StgStats dflags todo1 = if stg_stats then [D_stg_stats] else [] todo2 | WayProf `elem` wayNames dflags = StgDoMassageForProfiling : todo1 | otherwise = todo1 -- ----------------------------------------------------------------------------- -- DynFlags parser allFlags :: [String] allFlags = map ('-':) $ [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++ map ("fno-"++) flags ++ map ("f"++) flags where ok (PrefixPred _ _) = False ok _ = True flags = map fst fFlags dynamic_flags :: [(String, OptKind DynP)] dynamic_flags = [ ( "n" , NoArg (setDynFlag Opt_DryRun) ) , ( "cpp" , NoArg (setDynFlag Opt_Cpp)) , ( "F" , NoArg (setDynFlag Opt_Pp)) , ( "#include" , HasArg (addCmdlineHCInclude) ) , ( "v" , OptIntSuffix setVerbosity ) ------- Specific phases -------------------------------------------- , ( "pgmL" , HasArg (upd . setPgmL) ) , ( "pgmP" , HasArg (upd . setPgmP) ) , ( "pgmF" , HasArg (upd . setPgmF) ) , ( "pgmc" , HasArg (upd . setPgmc) ) , ( "pgmm" , HasArg (upd . setPgmm) ) , ( "pgms" , HasArg (upd . setPgms) ) , ( "pgma" , HasArg (upd . setPgma) ) , ( "pgml" , HasArg (upd . setPgml) ) , ( "pgmdll" , HasArg (upd . setPgmdll) ) , ( "pgmwindres" , HasArg (upd . setPgmwindres) ) , ( "optL" , HasArg (upd . addOptL) ) , ( "optP" , HasArg (upd . addOptP) ) , ( "optF" , HasArg (upd . addOptF) ) , ( "optc" , HasArg (upd . addOptc) ) , ( "optm" , HasArg (upd . addOptm) ) , ( "opta" , HasArg (upd . addOpta) ) , ( "optl" , HasArg (upd . addOptl) ) , ( "optdep" , HasArg (upd . addOptdep) ) , ( "optwindres" , HasArg (upd . addOptwindres) ) , ( "split-objs" , NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()) ) -------- Linking ---------------------------------------------------- , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep. , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } )) ------- Libraries --------------------------------------------------- , ( "L" , Prefix addLibraryPath ) , ( "l" , AnySuffix (\s -> do upd (addOptl s))) ------- Frameworks -------------------------------------------------- -- -framework-path should really be -F ... , ( "framework-path" , HasArg addFrameworkPath ) , ( "framework" , HasArg (upd . addCmdlineFramework) ) ------- Output Redirection ------------------------------------------ , ( "odir" , HasArg (upd . setObjectDir)) , ( "o" , SepArg (upd . setOutputFile . Just)) , ( "ohi" , HasArg (upd . setOutputHi . Just )) , ( "osuf" , HasArg (upd . setObjectSuf)) , ( "hcsuf" , HasArg (upd . setHcSuf)) , ( "hisuf" , HasArg (upd . setHiSuf)) , ( "hidir" , HasArg (upd . setHiDir)) , ( "tmpdir" , HasArg (upd . setTmpDir)) , ( "stubdir" , HasArg (upd . setStubDir)) , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just)) ------- Keeping temporary files ------------------------------------- -- These can be singular (think ghc -c) or plural (think ghc --make) , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles)) , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles)) , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles)) , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles)) , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles)) , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles)) -- This only makes sense as plural , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles)) ------- Miscellaneous ---------------------------------------------- , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain)) , ( "main-is" , SepArg setMainIs ) , ( "haddock" , NoArg (setDynFlag Opt_Haddock) ) , ( "hpcdir" , SepArg setOptHpcDir ) ------- recompilation checker (DEPRECATED, use -fforce-recomp) ----- , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) ) , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) ) ------- Packages ---------------------------------------------------- , ( "package-conf" , HasArg extraPkgConf_ ) , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) ) , ( "package-name" , HasArg (upd . setPackageName) ) , ( "package" , HasArg exposePackage ) , ( "hide-package" , HasArg hidePackage ) , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) ) , ( "ignore-package" , HasArg ignorePackage ) , ( "syslib" , HasArg exposePackage ) -- for compatibility ------ HsCpp opts --------------------------------------------------- , ( "D", AnySuffix (upd . addOptP) ) , ( "U", AnySuffix (upd . addOptP) ) ------- Include/Import Paths ---------------------------------------- , ( "I" , Prefix addIncludePath) , ( "i" , OptPrefix addImportPath ) ------ Debugging ---------------------------------------------------- , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats)) , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm) , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz) , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty) , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm) , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm) , ( "ddump-asm", setDumpFlag Opt_D_dump_asm) , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native) , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness) , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce) , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc) , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts) , ( "ddump-asm-regalloc-stages", setDumpFlag Opt_D_dump_asm_regalloc_stages) , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats) , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal) , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv) , ( "ddump-ds", setDumpFlag Opt_D_dump_ds) , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC) , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign) , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings) , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings) , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal) , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed) , ( "ddump-rn", setDumpFlag Opt_D_dump_rn) , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl) , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations) , ( "ddump-spec", setDumpFlag Opt_D_dump_spec) , ( "ddump-prep", setDumpFlag Opt_D_dump_prep) , ( "ddump-stg", setDumpFlag Opt_D_dump_stg) , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal) , ( "ddump-tc", setDumpFlag Opt_D_dump_tc) , ( "ddump-types", setDumpFlag Opt_D_dump_types) , ( "ddump-rules", setDumpFlag Opt_D_dump_rules) , ( "ddump-cse", setDumpFlag Opt_D_dump_cse) , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper) , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace) , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace) , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace) , ( "ddump-splices", setDumpFlag Opt_D_dump_splices) , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats) , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm) , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats) , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs) , ( "dsource-stats", setDumpFlag Opt_D_source_stats) , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core) , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg) , ( "ddump-hi", setDumpFlag Opt_D_dump_hi) , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports) , ( "ddump-vect", setDumpFlag Opt_D_dump_vect) , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc) , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles) , ( "ddump-to-file", setDumpFlag Opt_DumpToFile) , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs)) , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting)) , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting)) , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting)) , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting)) , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp setVerbosity (Just 2)) ) , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats)) ------ Machine dependant (-m) stuff --------------------------- , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) )) , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) )) , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) )) ------ Warning opts ------------------------------------------------- , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) ) , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) ) , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) ) , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) ) , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) ) ------ Optimisation flags ------------------------------------------ , ( "O" , NoArg (upd (setOptLevel 1))) , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1)))) -- If the number is missing, use 1 , ( "fmax-simplifier-iterations", IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })) ) -- liberate-case-threshold is an old flag for '-fspec-threshold' , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n }))) , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n }))) , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s }))) , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n }) ------ Compiler flags ----------------------------------------------- , ( "fasm", NoArg (setObjTarget HscAsm) ) , ( "fvia-c", NoArg (setObjTarget HscC) ) , ( "fvia-C", NoArg (setObjTarget HscC) ) , ( "fno-code", NoArg (setTarget HscNothing)) , ( "fbyte-code", NoArg (setTarget HscInterpreted) ) , ( "fobject-code", NoArg (setTarget defaultHscTarget) ) , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) ) , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) ) -- the rest of the -f* and -fno-* flags , ( "f", PrefixPred (isFlag fFlags) (\f -> setDynFlag (getFlag fFlags f)) ) , ( "f", PrefixPred (isPrefFlag "no-" fFlags) (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) ) -- the -X* and -XNo* flags , ( "X", PrefixPred (isFlag xFlags) (\f -> setDynFlag (getFlag xFlags f)) ) , ( "X", PrefixPred (isPrefFlag "No" xFlags) (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) ) ] -- these -f flags can all be reversed with -fno- fFlags = [ ( "warn-dodgy-imports", Opt_WarnDodgyImports ), ( "warn-duplicate-exports", Opt_WarnDuplicateExports ), ( "warn-hi-shadowing", Opt_WarnHiShadows ), ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ), ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ), ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ), ( "warn-missing-fields", Opt_WarnMissingFields ), ( "warn-missing-methods", Opt_WarnMissingMethods ), ( "warn-missing-signatures", Opt_WarnMissingSigs ), ( "warn-name-shadowing", Opt_WarnNameShadowing ), ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ), ( "warn-simple-patterns", Opt_WarnSimplePatterns ), ( "warn-type-defaults", Opt_WarnTypeDefaults ), ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ), ( "warn-unused-binds", Opt_WarnUnusedBinds ), ( "warn-unused-imports", Opt_WarnUnusedImports ), ( "warn-unused-matches", Opt_WarnUnusedMatches ), ( "warn-deprecations", Opt_WarnDeprecations ), ( "warn-orphans", Opt_WarnOrphans ), ( "warn-tabs", Opt_WarnTabs ), ( "print-explicit-foralls", Opt_PrintExplicitForalls ), ( "strictness", Opt_Strictness ), ( "full-laziness", Opt_FullLaziness ), ( "liberate-case", Opt_LiberateCase ), ( "spec-constr", Opt_SpecConstr ), ( "cse", Opt_CSE ), ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ), ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ), ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ), ( "ignore-asserts", Opt_IgnoreAsserts ), ( "ignore-breakpoints", Opt_IgnoreBreakpoints), ( "do-eta-reduction", Opt_DoEtaReduction ), ( "case-merge", Opt_CaseMerge ), ( "unbox-strict-fields", Opt_UnboxStrictFields ), ( "dicts-cheap", Opt_DictsCheap ), ( "excess-precision", Opt_ExcessPrecision ), ( "asm-mangling", Opt_DoAsmMangling ), ( "print-bind-result", Opt_PrintBindResult ), ( "force-recomp", Opt_ForceRecomp ), ( "hpc-no-auto", Opt_Hpc_No_Auto ), ( "rewrite-rules", Opt_RewriteRules ), ( "break-on-exception", Opt_BreakOnException ), ( "break-on-error", Opt_BreakOnError ), ( "print-evld-with-show", Opt_PrintEvldWithShow ), ( "run-cps", Opt_RunCPSZ ), ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack), ( "vectorise", Opt_Vectorise ), ( "regs-graph", Opt_RegsGraph), ( "regs-iterative", Opt_RegsIterative), -- Deprecated in favour of -XTemplateHaskell: ( "th", Opt_TemplateHaskell ), -- Deprecated in favour of -XForeignFunctionInterface: ( "fi", Opt_ForeignFunctionInterface ), -- Deprecated in favour of -XForeignFunctionInterface: ( "ffi", Opt_ForeignFunctionInterface ), -- Deprecated in favour of -XArrows: ( "arrows", Opt_Arrows ), -- Deprecated in favour of -XGenerics: ( "generics", Opt_Generics ), -- Deprecated in favour of -XImplicitPrelude: ( "implicit-prelude", Opt_ImplicitPrelude ), -- Deprecated in favour of -XBangPatterns: ( "bang-patterns", Opt_BangPatterns ), -- Deprecated in favour of -XMonomorphismRestriction: ( "monomorphism-restriction", Opt_MonomorphismRestriction ), -- Deprecated in favour of -XMonoPatBinds: ( "mono-pat-binds", Opt_MonoPatBinds ), -- Deprecated in favour of -XExtendedDefaultRules: ( "extended-default-rules", Opt_ExtendedDefaultRules ), -- Deprecated in favour of -XImplicitParams: ( "implicit-params", Opt_ImplicitParams ), -- Deprecated in favour of -XScopedTypeVariables: ( "scoped-type-variables", Opt_ScopedTypeVariables ), -- Deprecated in favour of -XPArr: ( "parr", Opt_PArr ), -- Deprecated in favour of -XOverlappingInstances: ( "allow-overlapping-instances", Opt_OverlappingInstances ), -- Deprecated in favour of -XUndecidableInstances: ( "allow-undecidable-instances", Opt_UndecidableInstances ), -- Deprecated in favour of -XIncoherentInstances: ( "allow-incoherent-instances", Opt_IncoherentInstances ), ( "gen-manifest", Opt_GenManifest ), ( "embed-manifest", Opt_EmbedManifest ) ] supportedLanguages :: [String] supportedLanguages = map fst xFlags -- These -X flags can all be reversed with -XNo xFlags :: [(String, DynFlag)] xFlags = [ ( "CPP", Opt_Cpp ), ( "PatternGuards", Opt_PatternGuards ), ( "UnicodeSyntax", Opt_UnicodeSyntax ), ( "MagicHash", Opt_MagicHash ), ( "PolymorphicComponents", Opt_PolymorphicComponents ), ( "ExistentialQuantification", Opt_ExistentialQuantification ), ( "KindSignatures", Opt_KindSignatures ), ( "PatternSignatures", Opt_PatternSignatures ), ( "EmptyDataDecls", Opt_EmptyDataDecls ), ( "ParallelListComp", Opt_ParallelListComp ), ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ), ( "UnliftedFFITypes", Opt_UnliftedFFITypes ), ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ), ( "Rank2Types", Opt_Rank2Types ), ( "RankNTypes", Opt_RankNTypes ), ( "TypeOperators", Opt_TypeOperators ), ( "RecursiveDo", Opt_RecursiveDo ), ( "Arrows", Opt_Arrows ), ( "PArr", Opt_PArr ), ( "TemplateHaskell", Opt_TemplateHaskell ), ( "Generics", Opt_Generics ), -- On by default: ( "ImplicitPrelude", Opt_ImplicitPrelude ), ( "RecordWildCards", Opt_RecordWildCards ), ( "RecordPuns", Opt_RecordPuns ), ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ), ( "OverloadedStrings", Opt_OverloadedStrings ), ( "GADTs", Opt_GADTs ), ( "TypeFamilies", Opt_TypeFamilies ), ( "BangPatterns", Opt_BangPatterns ), -- On by default: ( "MonomorphismRestriction", Opt_MonomorphismRestriction ), -- On by default (which is not strictly H98): ( "MonoPatBinds", Opt_MonoPatBinds ), ( "RelaxedPolyRec", Opt_RelaxedPolyRec), ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ), ( "ImplicitParams", Opt_ImplicitParams ), ( "ScopedTypeVariables", Opt_ScopedTypeVariables ), ( "UnboxedTuples", Opt_UnboxedTuples ), ( "StandaloneDeriving", Opt_StandaloneDeriving ), ( "DeriveDataTypeable", Opt_DeriveDataTypeable ), ( "TypeSynonymInstances", Opt_TypeSynonymInstances ), ( "FlexibleContexts", Opt_FlexibleContexts ), ( "FlexibleInstances", Opt_FlexibleInstances ), ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ), ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ), ( "FunctionalDependencies", Opt_FunctionalDependencies ), ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ), ( "OverlappingInstances", Opt_OverlappingInstances ), ( "UndecidableInstances", Opt_UndecidableInstances ), ( "IncoherentInstances", Opt_IncoherentInstances ) ] impliedFlags :: [(DynFlag, [DynFlag])] impliedFlags = [ ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs ] glasgowExtsFlags = [ Opt_PrintExplicitForalls , Opt_ForeignFunctionInterface , Opt_UnliftedFFITypes , Opt_GADTs , Opt_ImplicitParams , Opt_ScopedTypeVariables , Opt_UnboxedTuples , Opt_TypeSynonymInstances , Opt_StandaloneDeriving , Opt_DeriveDataTypeable , Opt_FlexibleContexts , Opt_FlexibleInstances , Opt_ConstrainedClassMethods , Opt_MultiParamTypeClasses , Opt_FunctionalDependencies , Opt_MagicHash , Opt_PolymorphicComponents , Opt_ExistentialQuantification , Opt_UnicodeSyntax , Opt_PatternGuards , Opt_LiberalTypeSynonyms , Opt_RankNTypes , Opt_TypeOperators , Opt_RecursiveDo , Opt_ParallelListComp , Opt_EmptyDataDecls , Opt_KindSignatures , Opt_PatternSignatures , Opt_GeneralizedNewtypeDeriving , Opt_TypeFamilies ] ------------------ isFlag :: [(String,a)] -> String -> Bool isFlag flags f = any (\(ff,_) -> ff == f) flags isPrefFlag :: String -> [(String,a)] -> String -> Bool isPrefFlag pref flags no_f | Just f <- maybePrefixMatch pref no_f = isFlag flags f | otherwise = False ------------------ getFlag :: [(String,a)] -> String -> a getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of (o:os) -> o [] -> panic ("get_flag " ++ f) getPrefFlag :: String -> [(String,a)] -> String -> a getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f)) -- We should only be passed flags which match the prefix -- ----------------------------------------------------------------------------- -- Parsing the dynamic flags. parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String]) parseDynamicFlags dflags args = do let ((leftover,errs),dflags') = runCmdLine (processArgs dynamic_flags args) dflags when (not (null errs)) $ do throwDyn (UsageError (unlines errs)) return (dflags', leftover) type DynP = CmdLineP DynFlags upd :: (DynFlags -> DynFlags) -> DynP () upd f = do dfs <- getCmdLineState putCmdLineState $! (f dfs) -------------------------- setDynFlag, unSetDynFlag :: DynFlag -> DynP () setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps) where deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ] -- When you set f, set the ones it implies -- When you un-set f, however, we don't un-set the things it implies -- (except for -fno-glasgow-exts, which is treated specially) unSetDynFlag f = upd (\dfs -> dopt_unset dfs f) -------------------------- setDumpFlag :: DynFlag -> OptKind DynP setDumpFlag dump_flag = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag) -- Whenver we -ddump, switch off the recompilation checker, -- else you don't see the dump! setVerbosity :: Maybe Int -> DynP () setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 }) addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s}) extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s }) exposePackage p = upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s }) hidePackage p = upd (\s -> s{ packageFlags = HidePackage p : packageFlags s }) ignorePackage p = upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s }) setPackageName p | Nothing <- unpackPackageId pid = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier")) | otherwise = \s -> s{ thisPackage = pid } where pid = stringToPackageId p -- If we're linking a binary, then only targets that produce object -- code are allowed (requests for other target types are ignored). setTarget l = upd set where set dfs | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l } | otherwise = dfs -- Changes the target only if we're compiling object code. This is -- used by -fasm and -fvia-C, which switch from one to the other, but -- not from bytecode to object-code. The idea is that -fasm/-fvia-C -- can be safely used in an OPTIONS_GHC pragma. setObjTarget l = upd set where set dfs | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l } | otherwise = dfs setOptLevel :: Int -> DynFlags -> DynFlags setOptLevel n dflags | hscTarget dflags == HscInterpreted && n > 0 = dflags -- not in IO any more, oh well: -- putStr "warning: -O conflicts with --interactive; -O ignored.\n" | otherwise = updOptLevel n dflags setMainIs :: String -> DynP () setMainIs arg | not (null main_fn) && isLower (head main_fn) -- The arg looked like "Foo.Bar.baz" = upd $ \d -> d{ mainFunIs = Just main_fn, mainModIs = mkModule mainPackageId (mkModuleName main_mod) } | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar" = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) } | otherwise -- The arg looked like "baz" = upd $ \d -> d{ mainFunIs = Just arg } where (main_mod, main_fn) = splitLongestPrefix arg (== '.') ----------------------------------------------------------------------------- -- Paths & Libraries -- -i on its own deletes the import paths addImportPath "" = upd (\s -> s{importPaths = []}) addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p}) addLibraryPath p = upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p}) addIncludePath p = upd (\s -> s{includePaths = includePaths s ++ splitPathList p}) addFrameworkPath p = upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p}) split_marker = ':' -- not configurable (ToDo) splitPathList :: String -> [String] splitPathList s = filter notNull (splitUp s) -- empty paths are ignored: there might be a trailing -- ':' in the initial list, for example. Empty paths can -- cause confusion when they are translated into -I options -- for passing to gcc. where #ifndef mingw32_TARGET_OS splitUp xs = split split_marker xs #else -- Windows: 'hybrid' support for DOS-style paths in directory lists. -- -- That is, if "foo:bar:baz" is used, this interpreted as -- consisting of three entries, 'foo', 'bar', 'baz'. -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar" -- -- Notice that no attempt is made to fully replace the 'standard' -- split marker ':' with the Windows / DOS one, ';'. The reason being -- that this will cause too much breakage for users & ':' will -- work fine even with DOS paths, if you're not insisting on being silly. -- So, use either. splitUp [] = [] splitUp (x:':':div:xs) | div `elem` dir_markers = ((x:':':div:p): splitUp rs) where (p,rs) = findNextPath xs -- we used to check for existence of the path here, but that -- required the IO monad to be threaded through the command-line -- parser which is quite inconvenient. The splitUp xs = cons p (splitUp rs) where (p,rs) = findNextPath xs cons "" xs = xs cons x xs = x:xs -- will be called either when we've consumed nought or the -- ":/" part of a DOS path, so splitting is just a Q of -- finding the next split marker. findNextPath xs = case break (`elem` split_markers) xs of (p, d:ds) -> (p, ds) (p, xs) -> (p, xs) split_markers :: [Char] split_markers = [':', ';'] dir_markers :: [Char] dir_markers = ['/', '\\'] #endif -- ----------------------------------------------------------------------------- -- tmpDir, where we store temporary files. setTmpDir :: FilePath -> DynFlags -> DynFlags setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir } where #if !defined(mingw32_HOST_OS) canonicalise p = normalisePath p #else -- Canonicalisation of temp path under win32 is a bit more -- involved: (a) strip trailing slash, -- (b) normalise slashes -- (c) just in case, if there is a prefix /cygdrive/x/, change to x: -- canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path)) -- if we're operating under cygwin, and TMP/TEMP is of -- the form "/cygdrive/drive/path", translate this to -- "drive:/path" (as GHC isn't a cygwin app and doesn't -- understand /cygdrive paths.) xltCygdrive path | "/cygdrive/" `isPrefixOf` path = case drop (length "/cygdrive/") path of drive:xs@('/':_) -> drive:':':xs _ -> path | otherwise = path -- strip the trailing backslash (awful, but we only do this once). removeTrailingSlash path = case last path of '/' -> init path '\\' -> init path _ -> path #endif ----------------------------------------------------------------------------- -- Hpc stuff setOptHpcDir :: String -> DynP () setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg} ----------------------------------------------------------------------------- -- Via-C compilation stuff -- There are some options that we need to pass to gcc when compiling -- Haskell code via C, but are only supported by recent versions of -- gcc. The configure script decides which of these options we need, -- and puts them in the file "extra-gcc-opts" in $topdir, which is -- read before each via-C compilation. The advantage of having these -- in a separate file is that the file can be created at install-time -- depending on the available gcc version, and even re-generated later -- if gcc is upgraded. -- -- The options below are not dependent on the version of gcc, only the -- platform. machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations [String]) -- for registerised HC compilations machdepCCOpts dflags #if alpha_TARGET_ARCH = ( ["-w", "-mieee" #ifdef HAVE_THREADED_RTS_SUPPORT , "-D_REENTRANT" #endif ], [] ) -- For now, to suppress the gcc warning "call-clobbered -- register used for global register variable", we simply -- disable all warnings altogether using the -w flag. Oh well. #elif hppa_TARGET_ARCH -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi! -- (very nice, but too bad the HP /usr/include files don't agree.) = ( ["-D_HPUX_SOURCE"], [] ) #elif m68k_TARGET_ARCH -- -fno-defer-pop : for the .hc files, we want all the pushing/ -- popping of args to routines to be explicit; if we let things -- be deferred 'til after an STGJUMP, imminent death is certain! -- -- -fomit-frame-pointer : *don't* -- It's better to have a6 completely tied up being a frame pointer -- rather than let GCC pick random things to do with it. -- (If we want to steal a6, then we would try to do things -- as on iX86, where we *do* steal the frame pointer [%ebp].) = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] ) #elif i386_TARGET_ARCH -- -fno-defer-pop : basically the same game as for m68k -- -- -fomit-frame-pointer : *must* in .hc files; because we're stealing -- the fp (%ebp) for our register maps. = let n_regs = stolen_x86_regs dflags sta = opt_Static in ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else "" -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else "" ], [ "-fno-defer-pop", "-fomit-frame-pointer", -- we want -fno-builtin, because when gcc inlines -- built-in functions like memcpy() it tends to -- run out of registers, requiring -monly-n-regs "-fno-builtin", "-DSTOLEN_X86_REGS="++show n_regs ] ) #elif ia64_TARGET_ARCH = ( [], ["-fomit-frame-pointer", "-G0"] ) #elif x86_64_TARGET_ARCH = ( [], ["-fomit-frame-pointer", "-fno-asynchronous-unwind-tables", -- the unwind tables are unnecessary for HC code, -- and get in the way of -split-objs. Another option -- would be to throw them away in the mangler, but this -- is easier. "-fno-builtin" -- calling builtins like strlen() using the FFI can -- cause gcc to run out of regs, so use the external -- version. ] ) #elif sparc_TARGET_ARCH = ( [], ["-w"] ) -- For now, to suppress the gcc warning "call-clobbered -- register used for global register variable", we simply -- disable all warnings altogether using the -w flag. Oh well. #elif powerpc_apple_darwin_TARGET -- -no-cpp-precomp: -- Disable Apple's precompiling preprocessor. It's a great thing -- for "normal" programs, but it doesn't support register variable -- declarations. = ( [], ["-no-cpp-precomp"] ) #else = ( [], [] ) #endif picCCOpts :: DynFlags -> [String] picCCOpts dflags #if darwin_TARGET_OS -- Apple prefers to do things the other way round. -- PIC is on by default. -- -mdynamic-no-pic: -- Turn off PIC code generation. -- -fno-common: -- Don't generate "common" symbols - these are unwanted -- in dynamic libraries. | opt_PIC = ["-fno-common", "-D__PIC__"] | otherwise = ["-mdynamic-no-pic"] #elif mingw32_TARGET_OS -- no -fPIC for Windows | opt_PIC = ["-D__PIC__"] | otherwise = [] #else | opt_PIC = ["-fPIC", "-D__PIC__"] | otherwise = [] #endif -- ----------------------------------------------------------------------------- -- Splitting can_split :: Bool can_split = cSplitObjs == "YES" -- ----------------------------------------------------------------------------- -- Compiler Info compilerInfo :: [(String, String)] compilerInfo = [("Project name", cProjectName), ("Project version", cProjectVersion), ("Booter version", cBooterVersion), ("Stage", cStage), ("Interface file version", cHscIfaceFileVersion), ("Have interpreter", cGhcWithInterpreter), ("Object splitting", cSplitObjs), ("Have native code generator", cGhcWithNativeCodeGen), ("Support SMP", cGhcWithSMP), ("Unregisterised", cGhcUnregisterised), ("Tables next to code", cGhcEnableTablesNextToCode), ("Win32 DLLs", cEnableWin32DLLs), ("RTS ways", cGhcRTSWays), ("Leading underscore", cLeadingUnderscore)]