ghc/compiler/main/CmdLineOpts.lhs

   1
   2 % (c) The University of Glasgow, 1996-2000
   3 %
   4 \section[CmdLineOpts]{Things to do with command-line options}
   5
   6 \begin{code}
   7
   8 module CmdLineOpts (
   9         CoreToDo(..), StgToDo(..),
  10         SimplifierSwitch(..),
  11         SimplifierMode(..), FloatOutSwitches(..),
  12
  13         HscLang(..),
  14         DynFlag(..),    -- needed non-abstractly by DriverFlags
  15         DynFlags(..),
  16
  17         v_Static_hsc_opts,
  18
  19         isStaticHscFlag,
  20
  21         -- Manipulating DynFlags
  22         defaultDynFlags,                -- DynFlags
  23         defaultHscLang,                 -- HscLang
  24         dopt,                           -- DynFlag -> DynFlags -> Bool
  25         dopt_set, dopt_unset,           -- DynFlags -> DynFlag -> DynFlags
  26         dopt_CoreToDo,                  -- DynFlags -> [CoreToDo]
  27         dopt_StgToDo,                   -- DynFlags -> [StgToDo]
  28         dopt_HscLang,                   -- DynFlags -> HscLang
  29         dopt_OutName,                   -- DynFlags -> String
  30         getOpts,                        -- (DynFlags -> [a]) -> IO [a]
  31         setLang,
  32         getVerbFlag,
  33
  34         -- Manipulating the DynFlags state
  35         getDynFlags,                    -- IO DynFlags
  36         setDynFlags,                    -- DynFlags -> IO ()
  37         updDynFlags,                    -- (DynFlags -> DynFlags) -> IO ()
  38         dynFlag,                        -- (DynFlags -> a) -> IO a
  39         setDynFlag, unSetDynFlag,       -- DynFlag -> IO ()
  40         saveDynFlags,                   -- IO ()
  41         restoreDynFlags,                -- IO DynFlags
  42
  43         -- sets of warning opts
  44         standardWarnings,
  45         minusWOpts,
  46         minusWallOpts,
  47
  48         -- Output style options
  49         opt_PprStyle_NoPrags,
  50         opt_PprStyle_RawTypes,
  51         opt_PprUserLength,
  52         opt_PprStyle_Debug,
  53
  54         -- profiling opts
  55         opt_AutoSccsOnAllToplevs,
  56         opt_AutoSccsOnExportedToplevs,
  57         opt_AutoSccsOnIndividualCafs,
  58         opt_AutoSccsOnDicts,
  59         opt_SccProfilingOn,
  60         opt_DoTickyProfiling,
  61
  62         -- language opts
  63         opt_AllStrict,
  64         opt_DictsStrict,
  65         opt_MaxContextReductionDepth,
  66         opt_IrrefutableTuples,
  67         opt_NumbersStrict,
  68         opt_Parallel,
  69         opt_SMP,
  70         opt_RuntimeTypes,
  71         opt_Flatten,
  72
  73         -- optimisation opts
  74         opt_NoMethodSharing,
  75         opt_DoSemiTagging,
  76         opt_FoldrBuildOn,
  77         opt_LiberateCaseThreshold,
  78         opt_StgDoLetNoEscapes,
  79         opt_UnfoldCasms,
  80         opt_CprOff,
  81         opt_UsageSPOn,
  82         opt_UnboxStrictFields,
  83         opt_SimplNoPreInlining,
  84         opt_SimplDoEtaReduction,
  85         opt_SimplDoLambdaEtaExpansion,
  86         opt_SimplCaseMerge,
  87         opt_SimplExcessPrecision,
  88         opt_MaxWorkerArgs,
  89
  90         -- Unfolding control
  91         opt_UF_CreationThreshold,
  92         opt_UF_UseThreshold,
  93         opt_UF_FunAppDiscount,
  94         opt_UF_KeenessFactor,
  95         opt_UF_UpdateInPlace,
  96         opt_UF_CheapOp,
  97         opt_UF_DearOp,
  98
  99         -- misc opts
 100         opt_InPackage,
 101         opt_EmitCExternDecls,
 102         opt_EnsureSplittableC,
 103         opt_GranMacros,
 104         opt_HiVersion,
 105         opt_HistorySize,
 106         opt_IgnoreAsserts,
 107         opt_IgnoreIfacePragmas,
 108         opt_NoHiCheck,
 109         opt_OmitBlackHoling,
 110         opt_OmitInterfacePragmas,
 111         opt_NoPruneTyDecls,
 112         opt_NoPruneDecls,
 113         opt_Static,
 114         opt_Unregisterised,
 115         opt_EmitExternalCore
 116     ) where
 117
 118 #include "HsVersions.h"
 119
 120 import GlaExts
 121 import IOExts   ( IORef, readIORef, writeIORef )
 122 import Constants        -- Default values for some flags
 123 import Util
 124 import FastTypes
 125 import FastString       ( FastString, mkFastString )
 126 import Config
 127
 128 import Maybes           ( firstJust )
 129 \end{code}
 130
 131 %************************************************************************
 132 %*                                                                      *
 133 \subsection{Command-line options}
 134 %*                                                                      *
 135 %************************************************************************
 136
 137 The hsc command-line options are split into two categories:
 138
 139   - static flags
 140   - dynamic flags
 141
 142 Static flags are represented by top-level values of type Bool or Int,
 143 for example.  They therefore have the same value throughout the
 144 invocation of hsc.
 145
 146 Dynamic flags are represented by an abstract type, DynFlags, which is
 147 passed into hsc by the compilation manager for every compilation.
 148 Dynamic flags are those that change on a per-compilation basis,
 149 perhaps because they may be present in the OPTIONS pragma at the top
 150 of a module.
 151
 152 Other flag-related blurb:
 153
 154 A list of {\em ToDo}s is things to be done in a particular part of
 155 processing.  A (fictitious) example for the Core-to-Core simplifier
 156 might be: run the simplifier, then run the strictness analyser, then
 157 run the simplifier again (three ``todos'').
 158
 159 There are three ``to-do processing centers'' at the moment.  In the
 160 main loop (\tr{main/Main.lhs}), in the Core-to-Core processing loop
 161 (\tr{simplCore/SimplCore.lhs), and in the STG-to-STG processing loop
 162 (\tr{simplStg/SimplStg.lhs}).
 163
 164 %************************************************************************
 165 %*                                                                      *
 166 \subsection{Datatypes associated with command-line options}
 167 %*                                                                      *
 168 %************************************************************************
 169
 170 \begin{code}
 171 data CoreToDo           -- These are diff core-to-core passes,
 172                         -- which may be invoked in any order,
 173                         -- as many times as you like.
 174
 175   = CoreDoSimplify      -- The core-to-core simplifier.
 176         SimplifierMode
 177         [SimplifierSwitch]
 178                         -- Each run of the simplifier can take a different
 179                         -- set of simplifier-specific flags.
 180   | CoreDoFloatInwards
 181   | CoreDoFloatOutwards FloatOutSwitches
 182   | CoreLiberateCase
 183   | CoreDoPrintCore
 184   | CoreDoStaticArgs
 185   | CoreDoStrictness
 186   | CoreDoWorkerWrapper
 187   | CoreDoSpecialising
 188   | CoreDoSpecConstr
 189   | CoreDoUSPInf
 190   | CoreDoOldStrictness
 191   | CoreDoGlomBinds
 192   | CoreCSE
 193   | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
 194                                                 -- matching this string
 195
 196   | CoreDoNothing        -- useful when building up lists of these things
 197 \end{code}
 198
 199 \begin{code}
 200 data StgToDo
 201   = StgDoMassageForProfiling  -- should be (next to) last
 202   -- There's also setStgVarInfo, but its absolute "lastness"
 203   -- is so critical that it is hardwired in (no flag).
 204   | D_stg_stats
 205 \end{code}
 206
 207 \begin{code}
 208 data SimplifierMode             -- See comments in SimplMonad
 209   = SimplGently
 210   | SimplPhase Int
 211
 212 data SimplifierSwitch
 213   = MaxSimplifierIterations Int
 214   | NoCaseOfCase
 215
 216 data FloatOutSwitches
 217   = FloatOutSw  Bool    -- True <=> float lambdas to top level
 218                 Bool    -- True <=> float constants to top level,
 219                         --          even if they do not escape a lambda
 220 \end{code}
 221
 222 %************************************************************************
 223 %*                                                                      *
 224 \subsection{Dynamic command-line options}
 225 %*                                                                      *
 226 %************************************************************************
 227
 228 \begin{code}
 229 data DynFlag
 230
 231    -- debugging flags
 232    = Opt_D_dump_absC
 233    | Opt_D_dump_asm
 234    | Opt_D_dump_cpranal
 235    | Opt_D_dump_deriv
 236    | Opt_D_dump_ds
 237    | Opt_D_dump_flatC
 238    | Opt_D_dump_foreign
 239    | Opt_D_dump_inlinings
 240    | Opt_D_dump_occur_anal
 241    | Opt_D_dump_parsed
 242    | Opt_D_dump_realC
 243    | Opt_D_dump_rn
 244    | Opt_D_dump_simpl
 245    | Opt_D_dump_simpl_iterations
 246    | Opt_D_dump_spec
 247    | Opt_D_dump_prep
 248    | Opt_D_dump_stg
 249    | Opt_D_dump_stranal
 250    | Opt_D_dump_tc
 251    | Opt_D_dump_types
 252    | Opt_D_dump_rules
 253    | Opt_D_dump_usagesp
 254    | Opt_D_dump_cse
 255    | Opt_D_dump_worker_wrapper
 256    | Opt_D_dump_rn_trace
 257    | Opt_D_dump_rn_stats
 258    | Opt_D_dump_stix
 259    | Opt_D_dump_simpl_stats
 260    | Opt_D_dump_tc_trace
 261    | Opt_D_dump_BCOs
 262    | Opt_D_dump_vect
 263    | Opt_D_source_stats
 264    | Opt_D_verbose_core2core
 265    | Opt_D_verbose_stg2stg
 266    | Opt_D_dump_hi
 267    | Opt_D_dump_hi_diffs
 268    | Opt_D_dump_minimal_imports
 269    | Opt_DoCoreLinting
 270    | Opt_DoStgLinting
 271    | Opt_DoUSPLinting
 272
 273    | Opt_WarnDuplicateExports
 274    | Opt_WarnHiShadows
 275    | Opt_WarnIncompletePatterns
 276    | Opt_WarnMissingFields
 277    | Opt_WarnMissingMethods
 278    | Opt_WarnMissingSigs
 279    | Opt_WarnNameShadowing
 280    | Opt_WarnOverlappingPatterns
 281    | Opt_WarnSimplePatterns
 282    | Opt_WarnTypeDefaults
 283    | Opt_WarnUnusedBinds
 284    | Opt_WarnUnusedImports
 285    | Opt_WarnUnusedMatches
 286    | Opt_WarnDeprecations
 287    | Opt_WarnMisc
 288
 289    -- language opts
 290    | Opt_AllowOverlappingInstances
 291    | Opt_AllowUndecidableInstances
 292    | Opt_AllowIncoherentInstances
 293    | Opt_NoMonomorphismRestriction
 294    | Opt_GlasgowExts
 295    | Opt_PArr                          -- syntactic support for parallel arrays
 296    | Opt_Generics
 297    | Opt_NoImplicitPrelude
 298
 299    deriving (Eq)
 300
 301 data DynFlags = DynFlags {
 302   coreToDo              :: [CoreToDo],
 303   stgToDo               :: [StgToDo],
 304   hscLang               :: HscLang,
 305   hscOutName            :: String,      -- name of the output file
 306   hscStubHOutName       :: String,      -- name of the .stub_h output file
 307   hscStubCOutName       :: String,      -- name of the .stub_c output file
 308   extCoreName           :: String,      -- name of the .core output file
 309   verbosity             :: Int,         -- verbosity level
 310   cppFlag               :: Bool,        -- preprocess with cpp?
 311   ppFlag                :: Bool,        -- preprocess with a Haskell Pp?
 312   stolen_x86_regs       :: Int,
 313   cmdlineHcIncludes     :: [String],    -- -#includes
 314
 315   -- options for particular phases
 316   opt_L                 :: [String],
 317   opt_P                 :: [String],
 318   opt_F                 :: [String],
 319   opt_c                 :: [String],
 320   opt_a                 :: [String],
 321   opt_m                 :: [String],
 322 #ifdef ILX
 323   opt_I                 :: [String],
 324   opt_i                 :: [String],
 325 #endif
 326
 327   -- hsc dynamic flags
 328   flags                 :: [DynFlag]
 329  }
 330
 331 data HscLang
 332   = HscC
 333   | HscAsm
 334   | HscJava
 335   | HscILX
 336   | HscCore
 337   | HscInterpreted
 338   | HscNothing
 339     deriving (Eq, Show)
 340
 341 defaultHscLang
 342   | cGhcWithNativeCodeGen == "YES" &&
 343         (prefixMatch "i386" cTARGETPLATFORM ||
 344          prefixMatch "sparc" cTARGETPLATFORM)   =  HscAsm
 345   | otherwise                                   =  HscC
 346
 347 defaultDynFlags = DynFlags {
 348   coreToDo = [], stgToDo = [],
 349   hscLang = defaultHscLang,
 350   hscOutName = "",
 351   hscStubHOutName = "", hscStubCOutName = "",
 352   extCoreName = "",
 353   verbosity = 0,
 354   cppFlag               = False,
 355   ppFlag                = False,
 356   stolen_x86_regs       = 4,
 357   cmdlineHcIncludes     = [],
 358   opt_L                 = [],
 359   opt_P                 = [],
 360   opt_F                 = [],
 361   opt_c                 = [],
 362   opt_a                 = [],
 363   opt_m                 = [],
 364 #ifdef ILX
 365   opt_I                 = [],
 366   opt_i                 = [],
 367 #endif
 368   flags = [Opt_Generics] ++ standardWarnings,
 369         -- Generating the helper-functions for
 370         -- generics is now on by default
 371   }
 372
 373 {-
 374     Verbosity levels:
 375
 376     0   |   print errors & warnings only
 377     1   |   minimal verbosity: print "compiling M ... done." for each module.
 378     2   |   equivalent to -dshow-passes
 379     3   |   equivalent to existing "ghc -v"
 380     4   |   "ghc -v -ddump-most"
 381     5   |   "ghc -v -ddump-all"
 382 -}
 383
 384 dopt :: DynFlag -> DynFlags -> Bool
 385 dopt f dflags  = f `elem` (flags dflags)
 386
 387 dopt_CoreToDo :: DynFlags -> [CoreToDo]
 388 dopt_CoreToDo = coreToDo
 389
 390 dopt_StgToDo :: DynFlags -> [StgToDo]
 391 dopt_StgToDo = stgToDo
 392
 393 dopt_OutName :: DynFlags -> String
 394 dopt_OutName = hscOutName
 395
 396 dopt_HscLang :: DynFlags -> HscLang
 397 dopt_HscLang = hscLang
 398
 399 dopt_set :: DynFlags -> DynFlag -> DynFlags
 400 dopt_set dfs f = dfs{ flags = f : flags dfs }
 401
 402 dopt_unset :: DynFlags -> DynFlag -> DynFlags
 403 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
 404
 405 getOpts :: (DynFlags -> [a]) -> IO [a]
 406         -- We add to the options from the front, so we need to reverse the list
 407 getOpts opts = dynFlag opts >>= return . reverse
 408
 409 -- we can only switch between HscC, HscAsmm, and HscILX with dynamic flags
 410 -- (-fvia-C, -fasm, -filx respectively).
 411 setLang l = updDynFlags (\ dfs -> case hscLang dfs of
 412                                         HscC   -> dfs{ hscLang = l }
 413                                         HscAsm -> dfs{ hscLang = l }
 414                                         HscILX -> dfs{ hscLang = l }
 415                                         _      -> dfs)
 416
 417 getVerbFlag = do
 418    verb <- dynFlag verbosity
 419    if verb >= 3  then return  "-v" else return ""
 420 \end{code}
 421
 422 -----------------------------------------------------------------------------
 423 -- Mess about with the mutable variables holding the dynamic arguments
 424
 425 -- v_InitDynFlags
 426 --      is the "baseline" dynamic flags, initialised from
 427 --      the defaults and command line options, and updated by the
 428 --      ':s' command in GHCi.
 429 --
 430 -- v_DynFlags
 431 --      is the dynamic flags for the current compilation.  It is reset
 432 --      to the value of v_InitDynFlags before each compilation, then
 433 --      updated by reading any OPTIONS pragma in the current module.
 434
 435 \begin{code}
 436 GLOBAL_VAR(v_InitDynFlags, defaultDynFlags, DynFlags)
 437 GLOBAL_VAR(v_DynFlags,     defaultDynFlags, DynFlags)
 438
 439 setDynFlags :: DynFlags -> IO ()
 440 setDynFlags dfs = writeIORef v_DynFlags dfs
 441
 442 saveDynFlags :: IO ()
 443 saveDynFlags = do dfs <- readIORef v_DynFlags
 444                   writeIORef v_InitDynFlags dfs
 445
 446 restoreDynFlags :: IO DynFlags
 447 restoreDynFlags = do dfs <- readIORef v_InitDynFlags
 448                      writeIORef v_DynFlags dfs
 449                      return dfs
 450
 451 getDynFlags :: IO DynFlags
 452 getDynFlags = readIORef v_DynFlags
 453
 454 updDynFlags :: (DynFlags -> DynFlags) -> IO ()
 455 updDynFlags f = do dfs <- readIORef v_DynFlags
 456                    writeIORef v_DynFlags (f dfs)
 457
 458 dynFlag :: (DynFlags -> a) -> IO a
 459 dynFlag f = do dflags <- readIORef v_DynFlags; return (f dflags)
 460
 461 setDynFlag, unSetDynFlag :: DynFlag -> IO ()
 462 setDynFlag f   = updDynFlags (\dfs -> dopt_set dfs f)
 463 unSetDynFlag f = updDynFlags (\dfs -> dopt_unset dfs f)
 464 \end{code}
 465
 466
 467 %************************************************************************
 468 %*                                                                      *
 469 \subsection{Warnings}
 470 %*                                                                      *
 471 %************************************************************************
 472
 473 \begin{code}
 474 standardWarnings
 475     = [ Opt_WarnDeprecations,
 476         Opt_WarnOverlappingPatterns,
 477         Opt_WarnMissingFields,
 478         Opt_WarnMissingMethods,
 479         Opt_WarnDuplicateExports
 480       ]
 481
 482 minusWOpts
 483     = standardWarnings ++
 484       [ Opt_WarnUnusedBinds,
 485         Opt_WarnUnusedMatches,
 486         Opt_WarnUnusedImports,
 487         Opt_WarnIncompletePatterns,
 488         Opt_WarnMisc
 489       ]
 490
 491 minusWallOpts
 492     = minusWOpts ++
 493       [ Opt_WarnTypeDefaults,
 494         Opt_WarnNameShadowing,
 495         Opt_WarnMissingSigs,
 496         Opt_WarnHiShadows
 497       ]
 498 \end{code}
 499
 500 %************************************************************************
 501 %*                                                                      *
 502 \subsection{Classifying command-line options}
 503 %*                                                                      *
 504 %************************************************************************
 505
 506 \begin{code}
 507 -- v_Statis_hsc_opts is here to avoid a circular dependency with
 508 -- main/DriverState.
 509 GLOBAL_VAR(v_Static_hsc_opts, [], [String])
 510
 511 lookUp           :: FastString -> Bool
 512 lookup_int       :: String -> Maybe Int
 513 lookup_def_int   :: String -> Int -> Int
 514 lookup_def_float :: String -> Float -> Float
 515 lookup_str       :: String -> Maybe String
 516
 517 unpacked_static_opts = unsafePerformIO (readIORef v_Static_hsc_opts)
 518 packed_static_opts   = map mkFastString unpacked_static_opts
 519
 520 lookUp     sw = sw `elem` packed_static_opts
 521
 522 lookup_str sw = firstJust (map (startsWith sw) unpacked_static_opts)
 523
 524 lookup_int sw = case (lookup_str sw) of
 525                   Nothing -> Nothing
 526                   Just xx -> Just (read xx)
 527
 528 lookup_def_int sw def = case (lookup_str sw) of
 529                             Nothing -> def              -- Use default
 530                             Just xx -> read xx
 531
 532 lookup_def_float sw def = case (lookup_str sw) of
 533                             Nothing -> def              -- Use default
 534                             Just xx -> read xx
 535
 536
 537 {-
 538  Putting the compiler options into temporary at-files
 539  may turn out to be necessary later on if we turn hsc into
 540  a pure Win32 application where I think there's a command-line
 541  length limit of 255. unpacked_opts understands the @ option.
 542
 543 unpacked_opts :: [String]
 544 unpacked_opts =
 545   concat $
 546   map (expandAts) $
 547   map _UNPK_ argv  -- NOT ARGV any more: v_Static_hsc_opts
 548   where
 549    expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
 550    expandAts l = [l]
 551 -}
 552 \end{code}
 553
 554 %************************************************************************
 555 %*                                                                      *
 556 \subsection{Static options}
 557 %*                                                                      *
 558 %************************************************************************
 559
 560 \begin{code}
 561 -- debugging opts
 562 opt_PprStyle_NoPrags            = lookUp  FSLIT("-dppr-noprags")
 563 opt_PprStyle_Debug              = lookUp  FSLIT("-dppr-debug")
 564 opt_PprStyle_RawTypes           = lookUp  FSLIT("-dppr-rawtypes")
 565 opt_PprUserLength               = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
 566
 567 -- profiling opts
 568 opt_AutoSccsOnAllToplevs        = lookUp  FSLIT("-fauto-sccs-on-all-toplevs")
 569 opt_AutoSccsOnExportedToplevs   = lookUp  FSLIT("-fauto-sccs-on-exported-toplevs")
 570 opt_AutoSccsOnIndividualCafs    = lookUp  FSLIT("-fauto-sccs-on-individual-cafs")
 571 opt_AutoSccsOnDicts             = lookUp  FSLIT("-fauto-sccs-on-dicts")
 572 opt_SccProfilingOn              = lookUp  FSLIT("-fscc-profiling")
 573 opt_DoTickyProfiling            = lookUp  FSLIT("-fticky-ticky")
 574
 575 -- language opts
 576 opt_AllStrict                   = lookUp  FSLIT("-fall-strict")
 577 opt_DictsStrict                 = lookUp  FSLIT("-fdicts-strict")
 578 opt_IrrefutableTuples           = lookUp  FSLIT("-firrefutable-tuples")
 579 opt_MaxContextReductionDepth    = lookup_def_int "-fcontext-stack" mAX_CONTEXT_REDUCTION_DEPTH
 580 opt_NumbersStrict               = lookUp  FSLIT("-fnumbers-strict")
 581 opt_Parallel                    = lookUp  FSLIT("-fparallel")
 582 opt_SMP                         = lookUp  FSLIT("-fsmp")
 583 opt_Flatten                     = lookUp  FSLIT("-fflatten")
 584
 585 -- optimisation opts
 586 opt_NoMethodSharing             = lookUp  FSLIT("-fno-method-sharing")
 587 opt_DoSemiTagging               = lookUp  FSLIT("-fsemi-tagging")
 588 opt_FoldrBuildOn                = lookUp  FSLIT("-ffoldr-build-on")
 589 opt_CprOff                      = lookUp  FSLIT("-fcpr-off")
 590         -- Switch off CPR analysis in the new demand analyser
 591 opt_LiberateCaseThreshold       = lookup_def_int "-fliberate-case-threshold" (10::Int)
 592 opt_StgDoLetNoEscapes           = lookUp  FSLIT("-flet-no-escape")
 593 opt_UnfoldCasms                 = lookUp  FSLIT("-funfold-casms-in-hi-file")
 594 opt_UsageSPOn                   = lookUp  FSLIT("-fusagesp-on")
 595 opt_UnboxStrictFields           = lookUp  FSLIT("-funbox-strict-fields")
 596 opt_MaxWorkerArgs               = lookup_def_int "-fmax-worker-args" (10::Int)
 597
 598 {-
 599    The optional '-inpackage=P' flag tells what package
 600    we are compiling this module for.
 601    The Prelude, for example is compiled with '-inpackage std'
 602 -}
 603 opt_InPackage                   = case lookup_str "-inpackage=" of
 604                                     Just p  -> _PK_ p
 605                                     Nothing -> FSLIT("Main")    -- The package name if none is specified
 606
 607 opt_EmitCExternDecls            = lookUp  FSLIT("-femit-extern-decls")
 608 opt_EnsureSplittableC           = lookUp  FSLIT("-fglobalise-toplev-names")
 609 opt_GranMacros                  = lookUp  FSLIT("-fgransim")
 610 opt_HiVersion                   = read (cProjectVersionInt ++ cProjectPatchLevel) :: Int
 611 opt_HistorySize                 = lookup_def_int "-fhistory-size" 20
 612 opt_IgnoreAsserts               = lookUp  FSLIT("-fignore-asserts")
 613 opt_IgnoreIfacePragmas          = lookUp  FSLIT("-fignore-interface-pragmas")
 614 opt_NoHiCheck                   = lookUp  FSLIT("-fno-hi-version-check")
 615 opt_OmitBlackHoling             = lookUp  FSLIT("-dno-black-holing")
 616 opt_OmitInterfacePragmas        = lookUp  FSLIT("-fomit-interface-pragmas")
 617 opt_RuntimeTypes                = lookUp  FSLIT("-fruntime-types")
 618
 619 -- Simplifier switches
 620 opt_SimplNoPreInlining          = lookUp  FSLIT("-fno-pre-inlining")
 621         -- NoPreInlining is there just to see how bad things
 622         -- get if you don't do it!
 623 opt_SimplDoEtaReduction         = lookUp  FSLIT("-fdo-eta-reduction")
 624 opt_SimplDoLambdaEtaExpansion   = lookUp  FSLIT("-fdo-lambda-eta-expansion")
 625 opt_SimplCaseMerge              = lookUp  FSLIT("-fcase-merge")
 626 opt_SimplExcessPrecision        = lookUp  FSLIT("-fexcess-precision")
 627
 628 -- Unfolding control
 629 opt_UF_CreationThreshold        = lookup_def_int "-funfolding-creation-threshold"  (45::Int)
 630 opt_UF_UseThreshold             = lookup_def_int "-funfolding-use-threshold"       (8::Int)     -- Discounts can be big
 631 opt_UF_FunAppDiscount           = lookup_def_int "-funfolding-fun-discount"        (6::Int)     -- It's great to inline a fn
 632 opt_UF_KeenessFactor            = lookup_def_float "-funfolding-keeness-factor"    (1.5::Float)
 633 opt_UF_UpdateInPlace            = lookUp  FSLIT("-funfolding-update-in-place")
 634
 635 opt_UF_CheapOp  = ( 1 :: Int)   -- Only one instruction; and the args are charged for
 636 opt_UF_DearOp   = ( 4 :: Int)
 637
 638 opt_NoPruneDecls                = lookUp  FSLIT("-fno-prune-decls")
 639 opt_NoPruneTyDecls              = lookUp  FSLIT("-fno-prune-tydecls")
 640 opt_Static                      = lookUp  FSLIT("-static")
 641 opt_Unregisterised              = lookUp  FSLIT("-funregisterised")
 642 opt_EmitExternalCore            = lookUp  FSLIT("-fext-core")
 643 \end{code}
 644
 645 %************************************************************************
 646 %*                                                                      *
 647 \subsection{List of static hsc flags}
 648 %*                                                                      *
 649 %************************************************************************
 650
 651 \begin{code}
 652 isStaticHscFlag f =
 653   f `elem` [
 654         "fauto-sccs-on-all-toplevs",
 655         "fauto-sccs-on-exported-toplevs",
 656         "fauto-sccs-on-individual-cafs",
 657         "fauto-sccs-on-dicts",
 658         "fscc-profiling",
 659         "fticky-ticky",
 660         "fall-strict",
 661         "fdicts-strict",
 662         "firrefutable-tuples",
 663         "fnumbers-strict",
 664         "fparallel",
 665         "fsmp",
 666         "fflatten",
 667         "fsemi-tagging",
 668         "ffoldr-build-on",
 669         "flet-no-escape",
 670         "funfold-casms-in-hi-file",
 671         "fusagesp-on",
 672         "funbox-strict-fields",
 673         "femit-extern-decls",
 674         "fglobalise-toplev-names",
 675         "fgransim",
 676         "fignore-asserts",
 677         "fignore-interface-pragmas",
 678         "fno-hi-version-check",
 679         "dno-black-holing",
 680         "fno-method-sharing",
 681         "fomit-interface-pragmas",
 682         "fruntime-types",
 683         "fno-pre-inlining",
 684         "fdo-eta-reduction",
 685         "fdo-lambda-eta-expansion",
 686         "fcase-merge",
 687         "fexcess-precision",
 688         "funfolding-update-in-place",
 689         "fno-prune-decls",
 690         "fno-prune-tydecls",
 691         "static",
 692         "funregisterised",
 693         "fext-core",
 694         "frule-check",
 695         "fcpr-off"
 696         ]
 697   || any (flip prefixMatch f) [
 698         "fcontext-stack",
 699         "fliberate-case-threshold",
 700         "fmax-worker-args",
 701         "fhistory-size",
 702         "funfolding-creation-threshold",
 703         "funfolding-use-threshold",
 704         "funfolding-fun-discount",
 705         "funfolding-keeness-factor"
 706      ]
 707 \end{code}
 708
 709 %************************************************************************
 710 %*                                                                      *
 711 \subsection{Misc functions for command-line options}
 712 %*                                                                      *
 713 %************************************************************************
 714
 715
 716
 717 \begin{code}
 718 startsWith :: String -> String -> Maybe String
 719 -- startsWith pfx (pfx++rest) = Just rest
 720
 721 startsWith []     str = Just str
 722 startsWith (c:cs) (s:ss)
 723   = if c /= s then Nothing else startsWith cs ss
 724 startsWith  _     []  = Nothing
 725
 726 endsWith  :: String -> String -> Maybe String
 727 endsWith cs ss
 728   = case (startsWith (reverse cs) (reverse ss)) of
 729       Nothing -> Nothing
 730       Just rs -> Just (reverse rs)
 731 \end{code}