DynFlags.hs 77.9 KB
Newer Older
1

2
3
4
5
6
7
8
9
10
11
12
13
14
15
-----------------------------------------------------------------------------
--
-- 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 (
Ian Lynagh's avatar
Ian Lynagh committed
16
17
18
19
20
21
22
23
24
        -- Dynamic flags
        DynFlag(..),
        DynFlags(..),
        HscTarget(..), isObjectTarget, defaultObjectTarget,
        GhcMode(..), isOneShot,
        GhcLink(..), isNoLink,
        PackageFlag(..),
        Option(..),
        DynLibLoader(..),
25
        fFlags, xFlags,
26
        DPHBackend(..),
27

Ian Lynagh's avatar
Ian Lynagh committed
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
        -- 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,
49
        allFlags,
50

Ian Lynagh's avatar
Ian Lynagh committed
51
52
        -- misc stuff
        machdepCCOpts, picCCOpts,
53
    supportedLanguages, languageOptions,
54
    compilerInfo,
55
56
57
58
  ) where

#include "HsVersions.h"

59
import Module
Simon Marlow's avatar
Simon Marlow committed
60
import PackageConfig
Ian Lynagh's avatar
Ian Lynagh committed
61
import PrelNames        ( mAIN )
Simon Marlow's avatar
Simon Marlow committed
62
#ifdef i386_TARGET_ARCH
Ian Lynagh's avatar
Ian Lynagh committed
63
import StaticFlags      ( opt_Static )
Simon Marlow's avatar
Simon Marlow committed
64
#endif
Ian Lynagh's avatar
Ian Lynagh committed
65
66
import StaticFlags      ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
                          v_RTS_Build_tag )
67
import {-# SOURCE #-} Packages (PackageState)
Ian Lynagh's avatar
Ian Lynagh committed
68
import DriverPhases     ( Phase(..), phaseInputExt )
69
70
import Config
import CmdLineParser
Ian Lynagh's avatar
Ian Lynagh committed
71
72
import Constants        ( mAX_CONTEXT_REDUCTION_DEPTH )
import Panic            ( panic, GhcException(..) )
73
import UniqFM           ( UniqFM )
74
import Util
75
import Maybes           ( orElse )
76
import SrcLoc           ( SrcSpan )
Simon Marlow's avatar
Simon Marlow committed
77
78
import Outputable
import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
79

Ian Lynagh's avatar
Ian Lynagh committed
80
import Data.IORef       ( readIORef )
Simon Marlow's avatar
Simon Marlow committed
81
import Control.Exception ( throwDyn )
Ian Lynagh's avatar
Ian Lynagh committed
82
import Control.Monad    ( when )
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
83

84
import Data.Char
Ian Lynagh's avatar
Ian Lynagh committed
85
import System.FilePath
86
87
import System.IO        ( hPutStrLn, stderr )

88
89
90
91
92
93
94
-- -----------------------------------------------------------------------------
-- DynFlags

data DynFlag

   -- debugging flags
   = Opt_D_dump_cmm
95
   | Opt_D_dump_cmmz
96
   | Opt_D_dump_cmmz_pretty
97
   | Opt_D_dump_cps_cmm
98
   | Opt_D_dump_cvt_cmm
99
   | Opt_D_dump_asm
100
101
   | Opt_D_dump_asm_native
   | Opt_D_dump_asm_liveness
102
   | Opt_D_dump_asm_coalesce
103
104
105
   | Opt_D_dump_asm_regalloc
   | Opt_D_dump_asm_regalloc_stages
   | Opt_D_dump_asm_conflicts
106
   | Opt_D_dump_asm_stats
107
108
109
110
111
112
   | Opt_D_dump_cpranal
   | Opt_D_dump_deriv
   | Opt_D_dump_ds
   | Opt_D_dump_flatC
   | Opt_D_dump_foreign
   | Opt_D_dump_inlinings
113
   | Opt_D_dump_rule_firings
114
115
116
117
118
   | Opt_D_dump_occur_anal
   | Opt_D_dump_parsed
   | Opt_D_dump_rn
   | Opt_D_dump_simpl
   | Opt_D_dump_simpl_iterations
119
   | Opt_D_dump_simpl_phases
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
   | 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
andy@galois.com's avatar
andy@galois.com committed
138
   | Opt_D_dump_hpc
139
140
141
142
143
144
   | 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
145
   | Opt_D_dump_mod_cycles
146
   | Opt_D_dump_view_pattern_commoning
147
   | Opt_D_faststring_stats
Ian Lynagh's avatar
Ian Lynagh committed
148
   | Opt_DumpToFile                     -- ^ Append dump output to files instead of stdout.
Simon Marlow's avatar
Simon Marlow committed
149
   | Opt_D_no_debug_output
150
151
152
   | Opt_DoCoreLinting
   | Opt_DoStgLinting
   | Opt_DoCmmLinting
Ben.Lippmeier@anu.edu.au's avatar
Ben.Lippmeier@anu.edu.au committed
153
   | Opt_DoAsmLinting
154

Ian Lynagh's avatar
Ian Lynagh committed
155
   | Opt_WarnIsError                    -- -Werror; makes warnings fatal
156
157
   | Opt_WarnDuplicateExports
   | Opt_WarnHiShadows
158
   | Opt_WarnImplicitPrelude
159
160
161
162
163
164
165
166
167
   | Opt_WarnIncompletePatterns
   | Opt_WarnIncompletePatternsRecUpd
   | Opt_WarnMissingFields
   | Opt_WarnMissingMethods
   | Opt_WarnMissingSigs
   | Opt_WarnNameShadowing
   | Opt_WarnOverlappingPatterns
   | Opt_WarnSimplePatterns
   | Opt_WarnTypeDefaults
168
   | Opt_WarnMonomorphism
169
170
171
172
   | Opt_WarnUnusedBinds
   | Opt_WarnUnusedImports
   | Opt_WarnUnusedMatches
   | Opt_WarnDeprecations
173
   | Opt_WarnDeprecatedFlags
174
175
   | Opt_WarnDodgyImports
   | Opt_WarnOrphans
176
   | Opt_WarnTabs
177
178

   -- language opts
179
180
181
   | Opt_OverlappingInstances
   | Opt_UndecidableInstances
   | Opt_IncoherentInstances
182
   | Opt_MonomorphismRestriction
183
   | Opt_MonoPatBinds
Ian Lynagh's avatar
Ian Lynagh committed
184
   | Opt_ExtendedDefaultRules           -- Use GHC's extended rules for defaulting
185
   | Opt_ForeignFunctionInterface
Ian Lynagh's avatar
Ian Lynagh committed
186
   | Opt_UnliftedFFITypes
Ian Lynagh's avatar
Ian Lynagh committed
187
188
   | Opt_PArr                           -- Syntactic support for parallel arrays
   | Opt_Arrows                         -- Arrow-notation syntax
189
   | Opt_TemplateHaskell
190
   | Opt_QuasiQuotes
191
192
   | Opt_ImplicitParams
   | Opt_Generics
Ian Lynagh's avatar
Ian Lynagh committed
193
   | Opt_ImplicitPrelude
194
   | Opt_ScopedTypeVariables
Ian Lynagh's avatar
Ian Lynagh committed
195
   | Opt_UnboxedTuples
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
196
   | Opt_BangPatterns
197
   | Opt_TypeFamilies
198
   | Opt_OverloadedStrings
199
   | Opt_DisambiguateRecordFields
200
   | Opt_RecordWildCards
201
   | Opt_RecordPuns
202
   | Opt_ViewPatterns
203
   | Opt_GADTs
204
   | Opt_RelaxedPolyRec
205
   | Opt_StandaloneDeriving
206
   | Opt_DeriveDataTypeable
207
   | Opt_TypeSynonymInstances
Ian Lynagh's avatar
Ian Lynagh committed
208
   | Opt_FlexibleContexts
209
   | Opt_FlexibleInstances
210
   | Opt_ConstrainedClassMethods
Ian Lynagh's avatar
Ian Lynagh committed
211
   | Opt_MultiParamTypeClasses
212
   | Opt_FunctionalDependencies
Ian Lynagh's avatar
Ian Lynagh committed
213
   | Opt_UnicodeSyntax
Ian Lynagh's avatar
Ian Lynagh committed
214
   | Opt_PolymorphicComponents
215
   | Opt_ExistentialQuantification
216
   | Opt_MagicHash
Ian Lynagh's avatar
Ian Lynagh committed
217
   | Opt_EmptyDataDecls
Ian Lynagh's avatar
Ian Lynagh committed
218
   | Opt_KindSignatures
Ian Lynagh's avatar
Ian Lynagh committed
219
   | Opt_PatternSignatures
Ian Lynagh's avatar
Ian Lynagh committed
220
   | Opt_ParallelListComp
221
   | Opt_TransformListComp
222
   | Opt_GeneralizedNewtypeDeriving
Ian Lynagh's avatar
Ian Lynagh committed
223
   | Opt_RecursiveDo
Ian Lynagh's avatar
Ian Lynagh committed
224
   | Opt_PatternGuards
225
   | Opt_LiberalTypeSynonyms
226
227
   | Opt_Rank2Types
   | Opt_RankNTypes
228
   | Opt_ImpredicativeTypes
Ian Lynagh's avatar
Ian Lynagh committed
229
   | Opt_TypeOperators
230

231
232
   | Opt_PrintExplicitForalls

233
234
235
   -- optimisation opts
   | Opt_Strictness
   | Opt_FullLaziness
236
   | Opt_StaticArgumentTransformation
237
   | Opt_CSE
238
239
   | Opt_LiberateCase
   | Opt_SpecConstr
240
241
242
243
244
245
246
   | Opt_IgnoreInterfacePragmas
   | Opt_OmitInterfacePragmas
   | Opt_DoLambdaEtaExpansion
   | Opt_IgnoreAsserts
   | Opt_DoEtaReduction
   | Opt_CaseMerge
   | Opt_UnboxStrictFields
247
   | Opt_MethodSharing
248
   | Opt_DictsCheap
249
   | Opt_RewriteRules
rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
250
   | Opt_Vectorise
Ian Lynagh's avatar
Ian Lynagh committed
251
252
   | Opt_RegsGraph                      -- do graph coloring register allocation
   | Opt_RegsIterative                  -- do iterative coalescing graph coloring register allocation
253
254
255
256

   -- misc opts
   | Opt_Cpp
   | Opt_Pp
257
   | Opt_ForceRecomp
258
259
260
261
262
263
264
   | Opt_DryRun
   | Opt_DoAsmMangling
   | Opt_ExcessPrecision
   | Opt_ReadUserPackageConf
   | Opt_NoHsMain
   | Opt_SplitObjs
   | Opt_StgStats
265
   | Opt_HideAllPackages
266
   | Opt_PrintBindResult
267
   | Opt_Haddock
David Waern's avatar
David Waern committed
268
   | Opt_HaddockOptions
269
   | Opt_Hpc_No_Auto
270
   | Opt_BreakOnException
271
   | Opt_BreakOnError
272
   | Opt_PrintEvldWithShow
273
   | Opt_PrintBindContents
274
275
   | Opt_GenManifest
   | Opt_EmbedManifest
276
277
   | Opt_RunCPSZ
   | Opt_ConvertToZipCfgAndBack
278
   | Opt_AutoLinkPackages
279
280
281
282
283
284
285
286

   -- keeping stuff
   | Opt_KeepHiDiffs
   | Opt_KeepHcFiles
   | Opt_KeepSFiles
   | Opt_KeepRawSFiles
   | Opt_KeepTmpFiles

287
   deriving (Eq, Show)
Ian Lynagh's avatar
Ian Lynagh committed
288

289
data DynFlags = DynFlags {
Ian Lynagh's avatar
Ian Lynagh committed
290
291
292
293
294
295
296
297
298
  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
299
  simplPhases           :: Int,         -- number of simplifier phases
Ian Lynagh's avatar
Ian Lynagh committed
300
  maxSimplIterations    :: Int,         -- max simplifier iterations
301
  shouldDumpSimplPhase  :: SimplifierMode -> Bool,
Ian Lynagh's avatar
Ian Lynagh committed
302
  ruleCheck             :: Maybe String,
303

Ian Lynagh's avatar
Ian Lynagh committed
304
305
306
  specConstrThreshold   :: Maybe Int,   -- Threshold for SpecConstr
  specConstrCount       :: Maybe Int,   -- Max number of specialisations for any one function
  liberateCaseThreshold :: Maybe Int,   -- Threshold for LiberateCase
307

Ian Lynagh's avatar
Ian Lynagh committed
308
309
310
311
312
313
  stolen_x86_regs       :: Int,
  cmdlineHcIncludes     :: [String],    -- -#includes
  importPaths           :: [FilePath],
  mainModIs             :: Module,
  mainFunIs             :: Maybe String,
  ctxtStkDepth          :: Int,         -- Typechecker context stack depth
314

315
316
  dphBackend            :: DPHBackend,

Ian Lynagh's avatar
Ian Lynagh committed
317
  thisPackage           :: PackageId,
318
319

  -- ways
Ian Lynagh's avatar
Ian Lynagh committed
320
321
322
323
  wayNames              :: [WayName],   -- way flags from the cmd line
  buildTag              :: String,      -- the global "way" (eg. "p" for prof)
  rtsBuildTag           :: String,      -- the RTS "way"

324
  -- paths etc.
Ian Lynagh's avatar
Ian Lynagh committed
325
326
327
  objectDir             :: Maybe String,
  hiDir                 :: Maybe String,
  stubDir               :: Maybe String,
328

Ian Lynagh's avatar
Ian Lynagh committed
329
330
331
  objectSuf             :: String,
  hcSuf                 :: String,
  hiSuf                 :: String,
332

Ian Lynagh's avatar
Ian Lynagh committed
333
334
335
  outputFile            :: Maybe String,
  outputHi              :: Maybe String,
  dynLibLoader          :: DynLibLoader,
336

337
  -- | This is set by DriverPipeline.runPipeline based on where
Ian Lynagh's avatar
Ian Lynagh committed
338
339
  --    its output is going.
  dumpPrefix            :: Maybe FilePath,
340
341

  -- | Override the dumpPrefix set by runPipeline.
Ian Lynagh's avatar
Ian Lynagh committed
342
343
344
345
346
347
348
349
350
  --    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 '/'

351
352
353
  ghcUsagePath          :: FilePath,    -- Filled in by SysTools
  ghciUsagePath         :: FilePath,    -- ditto

Ian Lynagh's avatar
Ian Lynagh committed
354
  hpcDir                :: String,      -- ^ path to store the .mix files
andy@galois.com's avatar
andy@galois.com committed
355

356
  -- options for particular phases
Ian Lynagh's avatar
Ian Lynagh committed
357
358
359
360
361
362
363
364
365
  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],
366
367

  -- commands for particular phases
Ian Lynagh's avatar
Ian Lynagh committed
368
369
370
371
372
373
374
375
376
  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]),
377
378
  pgm_T                 :: String,
  pgm_sysman            :: String,
379
  pgm_windres           :: String,
380

381
  --  Package flags
Ian Lynagh's avatar
Ian Lynagh committed
382
  extraPkgConfs         :: [FilePath],
383
384
  topDir                :: FilePath,    -- filled in by SysTools
  systemPackageConfig   :: FilePath,    -- ditto
Ian Lynagh's avatar
Ian Lynagh committed
385
386
        -- The -package-conf flags given on the command line, in the order
        -- they appeared.
387

Ian Lynagh's avatar
Ian Lynagh committed
388
389
  packageFlags          :: [PackageFlag],
        -- The -package and -hide-package flags from the command-line
390

391
  -- Package state
Ian Lynagh's avatar
Ian Lynagh committed
392
  -- NB. do not modify this field, it is calculated by
393
  -- Packages.initPackages and Packages.updatePackages.
394
  pkgDatabase           :: Maybe (UniqFM PackageConfig),
Ian Lynagh's avatar
Ian Lynagh committed
395
  pkgState              :: PackageState,
396
397

  -- hsc dynamic flags
Ian Lynagh's avatar
Ian Lynagh committed
398
399
  flags                 :: [DynFlag],

400
  -- message output
David Waern's avatar
David Waern committed
401
402
403
  log_action            :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),

  haddockOptions :: Maybe String
404
405
406
407
408
409
410
411
412
413
 }

data HscTarget
  = HscC
  | HscAsm
  | HscJava
  | HscInterpreted
  | HscNothing
  deriving (Eq, Show)

414
415
416
417
418
419
420
421
422
423
424
425
-- | 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.
426
data GhcMode
427
  = CompManager         -- ^ --make, GHCi, etc.
Ian Lynagh's avatar
Ian Lynagh committed
428
  | OneShot             -- ^ ghc -c Foo.hs
429
  | MkDepend            -- ^ ghc -M, see Finder for why we need this
430
431
432
433
434
435
  deriving Eq

isOneShot :: GhcMode -> Bool
isOneShot OneShot = True
isOneShot _other  = False

436
-- | What kind of linking to do.
Ian Lynagh's avatar
Ian Lynagh committed
437
438
439
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
440
  | LinkInMemory        -- Use the in-memory dynamic linker
Ian Lynagh's avatar
Ian Lynagh committed
441
  | LinkDynLib          -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
442
  deriving (Eq, Show)
443
444
445

isNoLink :: GhcLink -> Bool
isNoLink NoLink = True
twanvl's avatar
twanvl committed
446
isNoLink _      = False
447
448
449
450
451

data PackageFlag
  = ExposePackage  String
  | HidePackage    String
  | IgnorePackage  String
452
  deriving Eq
453

twanvl's avatar
twanvl committed
454
defaultHscTarget :: HscTarget
455
456
457
458
defaultHscTarget = defaultObjectTarget

-- | the 'HscTarget' value corresponding to the default way to create
-- object files on the current platform.
twanvl's avatar
twanvl committed
459
defaultObjectTarget :: HscTarget
460
defaultObjectTarget
Ian Lynagh's avatar
Ian Lynagh committed
461
462
  | cGhcWithNativeCodeGen == "YES"      =  HscAsm
  | otherwise                           =  HscC
463

464
465
466
467
468
469
data DynLibLoader
  = Deployable
  | Wrapped (Maybe String)
  | SystemDependent
  deriving Eq

twanvl's avatar
twanvl committed
470
initDynFlags :: DynFlags -> IO DynFlags
471
472
473
474
475
476
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{
Ian Lynagh's avatar
Ian Lynagh committed
477
478
479
480
        wayNames        = ways,
        buildTag        = build_tag,
        rtsBuildTag     = rts_build_tag
        }
481

twanvl's avatar
twanvl committed
482
defaultDynFlags :: DynFlags
483
484
defaultDynFlags =
     DynFlags {
Ian Lynagh's avatar
Ian Lynagh committed
485
486
487
488
489
490
491
492
493
        ghcMode                 = CompManager,
        ghcLink                 = LinkBinary,
        coreToDo                = Nothing,
        stgToDo                 = Nothing,
        hscTarget               = defaultHscTarget,
        hscOutName              = "",
        extCoreName             = "",
        verbosity               = 0,
        optLevel                = 0,
494
        simplPhases             = 2,
Ian Lynagh's avatar
Ian Lynagh committed
495
        maxSimplIterations      = 4,
496
        shouldDumpSimplPhase    = const False,
Ian Lynagh's avatar
Ian Lynagh committed
497
498
499
        ruleCheck               = Nothing,
        specConstrThreshold     = Just 200,
        specConstrCount         = Just 3,
500
        liberateCaseThreshold   = Just 200,
Ian Lynagh's avatar
Ian Lynagh committed
501
502
503
504
505
506
507
        stolen_x86_regs         = 4,
        cmdlineHcIncludes       = [],
        importPaths             = ["."],
        mainModIs               = mAIN,
        mainFunIs               = Nothing,
        ctxtStkDepth            = mAX_CONTEXT_REDUCTION_DEPTH,

508
509
        dphBackend              = DPHPar,

Ian Lynagh's avatar
Ian Lynagh committed
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
        thisPackage             = mainPackageId,

        objectDir               = Nothing,
        hiDir                   = Nothing,
        stubDir                 = Nothing,

        objectSuf               = phaseInputExt StopLn,
        hcSuf                   = phaseInputExt HCc,
        hiSuf                   = "hi",

        outputFile              = Nothing,
        outputHi                = Nothing,
        dynLibLoader            = Deployable,
        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                 = [],
543
        opt_windres             = [],
Ian Lynagh's avatar
Ian Lynagh committed
544
545
546

        extraPkgConfs           = [],
        packageFlags            = [],
547
548
        pkgDatabase             = Nothing,
        pkgState                = panic "no package state yet: call GHC.setSessionDynFlags",
Ian Lynagh's avatar
Ian Lynagh committed
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
        wayNames                = panic "defaultDynFlags: No wayNames",
        buildTag                = panic "defaultDynFlags: No buildTag",
        rtsBuildTag             = panic "defaultDynFlags: No rtsBuildTag",
        -- initSysTools fills all these in
        ghcUsagePath            = panic "defaultDynFlags: No ghciUsagePath",
        ghciUsagePath           = panic "defaultDynFlags: No ghciUsagePath",
        topDir                  = panic "defaultDynFlags: No topDir",
        systemPackageConfig     = panic "defaultDynFlags: No systemPackageConfig",
        pgm_L                   = panic "defaultDynFlags: No pgm_L",
        pgm_P                   = panic "defaultDynFlags: No pgm_P",
        pgm_F                   = panic "defaultDynFlags: No pgm_F",
        pgm_c                   = panic "defaultDynFlags: No pgm_c",
        pgm_m                   = panic "defaultDynFlags: No pgm_m",
        pgm_s                   = panic "defaultDynFlags: No pgm_s",
        pgm_a                   = panic "defaultDynFlags: No pgm_a",
        pgm_l                   = panic "defaultDynFlags: No pgm_l",
        pgm_dll                 = panic "defaultDynFlags: No pgm_dll",
        pgm_T                   = panic "defaultDynFlags: No pgm_T",
        pgm_sysman              = panic "defaultDynFlags: No pgm_sysman",
        pgm_windres             = panic "defaultDynFlags: No pgm_windres",
        -- end of initSysTools values
        haddockOptions = Nothing,
571
        flags = [
572
            Opt_AutoLinkPackages,
573
574
575
576
577
578
579
580
581
            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,

582
583
            Opt_MethodSharing,

584
585
            Opt_DoAsmMangling,

586
            Opt_GenManifest,
587
588
            Opt_EmbedManifest,
            Opt_PrintBindContents
589
590
591
592
593
            ]
            ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
                    -- The default -O0 options
            ++ standardWarnings,

Ian Lynagh's avatar
Ian Lynagh committed
594
        log_action = \severity srcSpan style msg ->
595
596
597
598
                        case severity of
                          SevInfo  -> hPutStrLn stderr (show (msg style))
                          SevFatal -> hPutStrLn stderr (show (msg style))
                          _        -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
599
600
      }

Ian Lynagh's avatar
Ian Lynagh committed
601
{-
602
    Verbosity levels:
Ian Lynagh's avatar
Ian Lynagh committed
603
604

    0   |   print errors & warnings only
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
    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)
Ian Lynagh's avatar
Ian Lynagh committed
623
        -- We add to the options from the front, so we need to reverse the list
624
625

getVerbFlag :: DynFlags -> String
Ian Lynagh's avatar
Ian Lynagh committed
626
627
getVerbFlag dflags
  | verbosity dflags >= 3  = "-v"
628
629
  | otherwise =  ""

twanvl's avatar
twanvl committed
630
631
632
633
634
635
636
637
setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
         setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
         addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
         addCmdlineFramework, addHaddockOpts
   :: String -> DynFlags -> DynFlags
setOutputFile, setOutputHi, setDumpPrefixForce
   :: Maybe String -> DynFlags -> DynFlags

638
639
640
641
642
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.
643

644
645
setObjectSuf  f d = d{ objectSuf  = f}
setHiSuf      f d = d{ hiSuf      = f}
646
647
648
649
setHcSuf      f d = d{ hcSuf      = f}

setOutputFile f d = d{ outputFile = f}
setOutputHi   f d = d{ outputHi   = f}
650

651
652
653
654
655
656
657
658
659
parseDynLibLoaderMode f d =
 case splitAt 8 f of
   ("deploy", "")       -> d{ dynLibLoader = Deployable }
   ("sysdep", "")       -> d{ dynLibLoader = SystemDependent }
   ("wrapped", "")      -> d{ dynLibLoader = Wrapped Nothing }
   ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
   ("wrapped:", flex)   -> d{ dynLibLoader = Wrapped (Just flex) }
   (_,_)                -> error "Unknown dynlib loader"

660
661
setDumpPrefixForce f d = d { dumpPrefixForce = f}

662
663
664
665
666
667
668
669
670
671
672
673
-- 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,[])}
674
setPgmwindres f d = d{ pgm_windres = f}
675
676
677
678
679
680
681
682
683

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}
684
addOptwindres f d = d{ opt_windres = f : opt_windres d}
685
686
687

addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}

David Waern's avatar
David Waern committed
688
689
addHaddockOpts f d = d{ haddockOptions = Just f}

690
691
692
693
694
695
696
697
698
699
700
701
-- -----------------------------------------------------------------------------
-- 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.
Ian Lynagh's avatar
Ian Lynagh committed
702
703
704
              String  -- a non-filepath prefix that shouldn't be
                      -- transformed (e.g., "/out=")
              String  -- the filepath/filename portion
705
 | Option     String
Ian Lynagh's avatar
Ian Lynagh committed
706

707
708
709
710
711
712
-----------------------------------------------------------------------------
-- Setting the optimisation level

updOptLevel :: Int -> DynFlags -> DynFlags
-- Set dynflags appropriate to the optimisation level
updOptLevel n dfs
713
  = dfs2{ optLevel = final_n }
714
  where
Ian Lynagh's avatar
Ian Lynagh committed
715
   final_n = max 0 (min 2 n)    -- Clamp to 0 <= n <= 2
716
717
718
   dfs1 = foldr (flip dopt_unset) dfs  remove_dopts
   dfs2 = foldr (flip dopt_set)   dfs1 extra_dopts

719
720
   extra_dopts  = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
   remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
Ian Lynagh's avatar
Ian Lynagh committed
721

722
723
optLevelFlags :: [([Int], DynFlag)]
optLevelFlags
Ian Lynagh's avatar
Ian Lynagh committed
724
  = [ ([0],     Opt_IgnoreInterfacePragmas)
725
    , ([0],     Opt_OmitInterfacePragmas)
726

Ian Lynagh's avatar
Ian Lynagh committed
727
728
729
730
731
732
733
734
    , ([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)
735

Ian Lynagh's avatar
Ian Lynagh committed
736
737
738
    , ([2],     Opt_LiberateCase)
    , ([2],     Opt_SpecConstr)
    , ([2],     Opt_StaticArgumentTransformation)
739
740

    , ([0,1,2], Opt_DoLambdaEtaExpansion)
Ian Lynagh's avatar
Ian Lynagh committed
741
742
743
744
                -- 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.
745
746
747
748
749
    ]

-- -----------------------------------------------------------------------------
-- Standard sets of warning options

twanvl's avatar
twanvl committed
750
standardWarnings :: [DynFlag]
751
752
standardWarnings
    = [ Opt_WarnDeprecations,
753
        Opt_WarnDeprecatedFlags,
Ian Lynagh's avatar
Ian Lynagh committed
754
755
756
757
        Opt_WarnOverlappingPatterns,
        Opt_WarnMissingFields,
        Opt_WarnMissingMethods,
        Opt_WarnDuplicateExports
758
759
      ]

twanvl's avatar
twanvl committed
760
minusWOpts :: [DynFlag]
761
minusWOpts
Ian Lynagh's avatar
Ian Lynagh committed
762
763
764
765
766
767
    = standardWarnings ++
      [ Opt_WarnUnusedBinds,
        Opt_WarnUnusedMatches,
        Opt_WarnUnusedImports,
        Opt_WarnIncompletePatterns,
        Opt_WarnDodgyImports
768
769
      ]

twanvl's avatar
twanvl committed
770
minusWallOpts :: [DynFlag]
771
772
minusWallOpts
    = minusWOpts ++
Ian Lynagh's avatar
Ian Lynagh committed
773
774
775
776
777
      [ Opt_WarnTypeDefaults,
        Opt_WarnNameShadowing,
        Opt_WarnMissingSigs,
        Opt_WarnHiShadows,
        Opt_WarnOrphans
778
779
      ]

780
-- minuswRemovesOpts should be every warning option
twanvl's avatar
twanvl committed
781
minuswRemovesOpts :: [DynFlag]
782
783
784
785
786
787
788
789
790
minuswRemovesOpts
    = minusWallOpts ++
      [Opt_WarnImplicitPrelude,
       Opt_WarnIncompletePatternsRecUpd,
       Opt_WarnSimplePatterns,
       Opt_WarnMonomorphism,
       Opt_WarnTabs
      ]

791
792
793
-- -----------------------------------------------------------------------------
-- CoreToDo:  abstraction of core-to-core passes to run.

Ian Lynagh's avatar
Ian Lynagh committed
794
795
796
data CoreToDo           -- These are diff core-to-core passes,
                        -- which may be invoked in any order,
                        -- as many times as you like.
797

Ian Lynagh's avatar
Ian Lynagh committed
798
799
800
801
802
  = CoreDoSimplify      -- The core-to-core simplifier.
        SimplifierMode
        [SimplifierSwitch]
                        -- Each run of the simplifier can take a different
                        -- set of simplifier-specific flags.
803
804
805
806
807
808
809
810
811
812
813
814
  | CoreDoFloatInwards
  | CoreDoFloatOutwards FloatOutSwitches
  | CoreLiberateCase
  | CoreDoPrintCore
  | CoreDoStaticArgs
  | CoreDoStrictness
  | CoreDoWorkerWrapper
  | CoreDoSpecialising
  | CoreDoSpecConstr
  | CoreDoOldStrictness
  | CoreDoGlomBinds
  | CoreCSE
Ian Lynagh's avatar
Ian Lynagh committed
815
816
  | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
                                                -- matching this string
817
  | CoreDoVectorisation DPHBackend
Ian Lynagh's avatar
Ian Lynagh committed
818
819
  | CoreDoNothing                -- Useful when building up
  | CoreDoPasses [CoreToDo]      -- lists of these things
820

Ian Lynagh's avatar
Ian Lynagh committed
821
data SimplifierMode             -- See comments in SimplMonad
822
  = SimplGently
823
  | SimplPhase Int [String]
824
825
826
827
828
829

data SimplifierSwitch
  = MaxSimplifierIterations Int
  | NoCaseOfCase

data FloatOutSwitches
Ian Lynagh's avatar
Ian Lynagh committed
830
831
832
  = FloatOutSw  Bool    -- True <=> float lambdas to top level
                Bool    -- True <=> float constants to top level,
                        --          even if they do not escape a lambda
833
834
835


-- The core-to-core pass ordering is derived from the DynFlags:
836
837
runWhen :: Bool -> CoreToDo -> CoreToDo
runWhen True  do_this = do_this
twanvl's avatar
twanvl committed
838
runWhen False _       = CoreDoNothing
839

840
841
842
843
runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
runMaybe (Just x) f = f x
runMaybe Nothing  _ = CoreDoNothing

844
845
846
847
848
getCoreToDo :: DynFlags -> [CoreToDo]
getCoreToDo dflags
  | Just todo <- coreToDo dflags = todo -- set explicitly by user
  | otherwise = core_todo
  where
Ian Lynagh's avatar
Ian Lynagh committed
849
    opt_level     = optLevel dflags
850
    phases        = simplPhases dflags
Ian Lynagh's avatar
Ian Lynagh committed
851
    max_iter      = maxSimplIterations dflags
852
853
854
    strictness    = dopt Opt_Strictness dflags
    full_laziness = dopt Opt_FullLaziness dflags
    cse           = dopt Opt_CSE dflags
855
856
    spec_constr   = dopt Opt_SpecConstr dflags
    liberate_case = dopt Opt_LiberateCase dflags
857
    rule_check    = ruleCheck dflags
858
    static_args   = dopt Opt_StaticArgumentTransformation dflags
859

860
    maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
861

862
863
864
865
866
867
868
    simpl_phase phase names iter
      = CoreDoPasses
          [ CoreDoSimplify (SimplPhase phase names) [
              MaxSimplifierIterations iter
            ],
            maybe_rule_check phase
          ]
869

870
871
872
873
874
    vectorisation
      = runWhen (dopt Opt_Vectorise dflags)
        $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]


875
876
                -- By default, we have 2 phases before phase 0.

Ian Lynagh's avatar
Ian Lynagh committed
877
878
879
880
                -- 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.
881

Ian Lynagh's avatar
Ian Lynagh committed
882
883
884
885
                -- Need phase 1 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
886
    simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
887
888
                                  | phase <- [phases, phases-1 .. 1] ]

889

Ian Lynagh's avatar
Ian Lynagh committed
890
        -- initial simplify: mk specialiser happy: minimum effort please
891
    simpl_gently = CoreDoSimplify SimplGently [
Ian Lynagh's avatar
Ian Lynagh committed
892
893
894
895
896
897
898
899
900
901
902
903
904
905
                        --      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
        ]
906

rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
907
    core_todo =
908
     if opt_level == 0 then
909
       [vectorisation,
rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
910
        simpl_phase 0 ["final"] max_iter]
Ian Lynagh's avatar
Ian Lynagh committed
911
     else {- opt_level >= 1 -} [
912

913
914
915
916
    -- We want to do the static argument transform before full laziness as it
    -- may expose extra opportunities to float things outwards. However, to fix
    -- up the output of the transformation we need at do at least one simplify
    -- after this before anything else
917
        runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
918

919
920
        -- We run vectorisation here for now, but we might also try to run
        -- it later
921
922
923
924
        vectorisation,

        -- initial simplify: mk specialiser happy: minimum effort please
        simpl_gently,
925

Ian Lynagh's avatar
Ian Lynagh committed
926
927
928
        -- Specialisation is best done before full laziness
        -- so that overloaded functions have all their dictionary lambdas manifest
        CoreDoSpecialising,
929

Ian Lynagh's avatar
Ian Lynagh committed
930
        runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
931

Ian Lynagh's avatar
Ian Lynagh committed
932
        CoreDoFloatInwards,
933

934
        simpl_phases,
935

Ian Lynagh's avatar
Ian Lynagh committed
936
937
                -- Phase 0: allow all Ids to be inlined now
                -- This gets foldr inlined before strictness analysis
938

Ian Lynagh's avatar
Ian Lynagh committed
939
940
941
942
943
944
945
946
                -- 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!
        simpl_phase 0 ["main"] (max max_iter 3),
947
948
949


#ifdef OLD_STRICTNESS
Ian Lynagh's avatar
Ian Lynagh committed
950
        CoreDoOldStrictness,
951
#endif
Ian Lynagh's avatar
Ian Lynagh committed
952
953
954
955
        runWhen strictness (CoreDoPasses [
                CoreDoStrictness,
                CoreDoWorkerWrapper,
                CoreDoGlomBinds,
956
                simpl_phase 0 ["post-worker-wrapper"] max_iter
957
                ]),
958

Ian Lynagh's avatar
Ian Lynagh committed
959
960
961
962
963
964
965
966
        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)
967
968


Ian Lynagh's avatar
Ian Lynagh committed
969
970
971
972
        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
973

Ian Lynagh's avatar
Ian Lynagh committed
974
        CoreDoFloatInwards,
975

Ian Lynagh's avatar
Ian Lynagh committed
976
        maybe_rule_check 0,
977

Ian Lynagh's avatar
Ian Lynagh committed
978
979
980
981
                -- Case-liberation for -O2.  This should be after
                -- strictness analysis and the simplification which follows it.
        runWhen liberate_case (CoreDoPasses [
            CoreLiberateCase,
982
            simpl_phase 0 ["post-liberate-case"] max_iter
Ian Lynagh's avatar
Ian Lynagh committed
983
984
985
            ]),         -- Run the simplifier after LiberateCase to vastly
                        -- reduce the possiblility of shadowing
                        -- Reason: see Note [Shadowing] in SpecConstr.lhs
986

Ian Lynagh's avatar
Ian Lynagh committed
987
        runWhen spec_constr CoreDoSpecConstr,
988

989
        maybe_rule_check 0,
990

Ian Lynagh's avatar
Ian Lynagh committed
991
        -- Final clean-up simplification:
992
        simpl_phase 0 ["final"] max_iter
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
     ]

-- -----------------------------------------------------------------------------
-- 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
Ian Lynagh's avatar
Ian Lynagh committed
1009
        stg_stats = dopt Opt_StgStats dflags
1010

Ian Lynagh's avatar
Ian Lynagh committed
1011
        todo1 = if stg_stats then [D_stg_stats] else []
1012

Ian Lynagh's avatar
Ian Lynagh committed
1013
1014
1015
1016
        todo2 | WayProf `elem` wayNames dflags
              = StgDoMassageForProfiling : todo1
              | otherwise
              = todo1
1017
1018
1019
1020

-- -----------------------------------------------------------------------------
-- DynFlags parser

1021
1022
allFlags :: [String]
allFlags = map ('-':) $
1023
           [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1024
           map ("fno-"++) flags ++
1025
           map ("f"++) flags ++
1026
1027
           map ("X"++) supportedLanguages ++
           map ("XNo"++) supportedLanguages
1028
1029
    where ok (PrefixPred _ _) = False
          ok _ = True
1030
          flags = [ name | (name, _, _) <- fFlags ]
1031

1032
dynamic_flags :: [Flag DynP]
1033
dynamic_flags = [
1034
1035
1036
1037
1038
    Flag "n"              (NoArg  (setDynFlag Opt_DryRun)) Supported
  , Flag "cpp"            (NoArg  (setDynFlag Opt_Cpp)) Supported
  , Flag "F"              (NoArg  (setDynFlag Opt_Pp)) Supported
  , Flag "#include"       (HasArg (addCmdlineHCInclude)) Supported
  , Flag "v"              (OptIntSuffix setVerbosity) Supported
1039

1040
        ------- Specific phases  --------------------------------------------
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
  , Flag "pgmL"           (HasArg (upd . setPgmL)) Supported
  , Flag "pgmP"           (HasArg (upd . setPgmP)) Supported
  , Flag "pgmF"           (HasArg (upd . setPgmF)) Supported
  , Flag "pgmc"           (HasArg (upd . setPgmc)) Supported
  , Flag "pgmm"           (HasArg (upd . setPgmm)) Supported
  , Flag "pgms"           (HasArg (upd . setPgms)) Supported
  , Flag "pgma"           (HasArg (upd . setPgma)) Supported
  , Flag "pgml"           (HasArg (upd . setPgml)) Supported
  , Flag "pgmdll"         (HasArg (upd . setPgmdll)) Supported
  , Flag "pgmwindres"     (HasArg (upd . setPgmwindres)) Supported

  , Flag "optL"           (HasArg (upd . addOptL)) Supported
  , Flag "optP"           (HasArg (upd . addOptP)) Supported
  , Flag "optF"           (HasArg (upd . addOptF)) Supported
  , Flag "optc"           (HasArg (upd . addOptc)) Supported
  , Flag "optm"           (HasArg (upd . addOptm)) Supported
  , Flag "opta"           (HasArg (upd . addOpta)) Supported
  , Flag "optl"           (HasArg (upd . addOptl)) Supported
  , Flag "optdep"         (HasArg (upd . addOptdep)) Supported
  , Flag "optwindres"     (HasArg (upd . addOptwindres)) Supported
1061
1062
1063

  , Flag "split-objs"
         (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1064
         Supported
1065

Ian Lynagh's avatar
Ian Lynagh committed
1066
        -------- Linking ----------------------------------------------------
1067
  , Flag "c"              (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1068
1069
1070
         Supported
  , Flag "no-link"        (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
         (Deprecated "Use -c instead")
1071
  , Flag "shared"         (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1072
         Supported
1073
  , Flag "dynload"        (HasArg (upd . parseDynLibLoaderMode))
1074
         Supported
1075

Ian Lynagh's avatar
Ian Lynagh committed
1076
        ------- Libraries ---------------------------------------------------
1077
1078
  , Flag "L"              (Prefix addLibraryPath ) Supported
  , Flag "l"              (AnySuffix (\s -> do upd (addOptl s))) Supported
1079

Ian Lynagh's avatar
Ian Lynagh committed
1080
        ------- Frameworks --------------------------------------------------
1081
        -- -framework-path should really be -F ...
1082
1083
  , Flag "framework-path" (HasArg addFrameworkPath ) Supported
  , Flag "framework"      (HasArg (upd . addCmdlineFramework)) Supported
Ian Lynagh's avatar
Ian Lynagh committed
1084
1085

        ------- Output Redirection ------------------------------------------
1086
1087
1088
1089
1090
1091
1092
1093
1094
  , Flag "odir"           (HasArg (upd . setObjectDir)) Supported
  , Flag "o"              (SepArg (upd . setOutputFile . Just)) Supported
  , Flag "ohi"            (HasArg (upd . setOutputHi   . Just )) Supported
  , Flag "osuf"           (HasArg (upd . setObjectSuf)) Supported
  , Flag "hcsuf"          (HasArg (upd . setHcSuf)) Supported
  , Flag "hisuf"          (HasArg (upd . setHiSuf)) Supported
  , Flag "hidir"          (HasArg (upd . setHiDir)) Supported
  , Flag "tmpdir"         (HasArg (upd . setTmpDir)) Supported
  , Flag "stubdir"        (HasArg (upd . setStubDir)) Supported
1095
  , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1096
         Supported