DynFlags.hs 86.9 KB
Newer Older
1

2
-- |
3
4
5
6
7
8
-- Dynamic flags
--
--
-- (c) The University of Glasgow 2005
--

9
-- Most flags are dynamic flags, which means they can change from
10
11
12
-- 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.
13
module DynFlags (
14
        -- * Dynamic flags and associated configuration types
Ian Lynagh's avatar
Ian Lynagh committed
15
16
17
18
19
20
21
22
        DynFlag(..),
        DynFlags(..),
        HscTarget(..), isObjectTarget, defaultObjectTarget,
        GhcMode(..), isOneShot,
        GhcLink(..), isNoLink,
        PackageFlag(..),
        Option(..),
        DynLibLoader(..),
23
        fFlags, xFlags,
24
        dphPackage,
25

26
        -- ** Manipulating DynFlags
Ian Lynagh's avatar
Ian Lynagh committed
27
28
29
30
31
        defaultDynFlags,                -- DynFlags
        initDynFlags,                   -- DynFlags -> IO DynFlags

        dopt,                           -- DynFlag -> DynFlags -> Bool
        dopt_set, dopt_unset,           -- DynFlags -> DynFlag -> DynFlags
32
        getOpts,                        -- DynFlags -> (DynFlags -> [a]) -> [a]
Ian Lynagh's avatar
Ian Lynagh committed
33
        getVerbFlag,
34
        getMainFun,
Ian Lynagh's avatar
Ian Lynagh committed
35
36
37
38
        updOptLevel,
        setTmpDir,
        setPackageName,

39
        -- ** Parsing DynFlags
Ian Lynagh's avatar
Ian Lynagh committed
40
        parseDynamicFlags,
41
        parseDynamicNoPackageFlags,
42
        allFlags,
43

44
45
46
        supportedLanguages, languageOptions,

        -- ** DynFlag C compiler options
Ian Lynagh's avatar
Ian Lynagh committed
47
        machdepCCOpts, picCCOpts,
48
49
50
51
52
53
54
55
56
57
58
59
60
61

        -- * Configuration of the core-to-core passes
        CoreToDo(..),
        SimplifierMode(..),
        SimplifierSwitch(..),
        FloatOutSwitches(..),
        getCoreToDo,

        -- * Configuration of the stg-to-stg passes
        StgToDo(..),
        getStgToDo,

        -- * Compiler configuration suitable for display to the user
        compilerInfo
62
63
64
65
  ) where

#include "HsVersions.h"

66
import Module
Simon Marlow's avatar
Simon Marlow committed
67
import PackageConfig
68
69
70
import PrelNames        ( mAIN, main_RDR_Unqual )
import RdrName          ( RdrName, mkRdrUnqual )
import OccName          ( mkVarOccFS )
Simon Marlow's avatar
Simon Marlow committed
71
#ifdef i386_TARGET_ARCH
Ian Lynagh's avatar
Ian Lynagh committed
72
import StaticFlags      ( opt_Static )
Simon Marlow's avatar
Simon Marlow committed
73
#endif
Ian Lynagh's avatar
Ian Lynagh committed
74
75
import StaticFlags      ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
                          v_RTS_Build_tag )
76
import {-# SOURCE #-} Packages (PackageState)
Ian Lynagh's avatar
Ian Lynagh committed
77
import DriverPhases     ( Phase(..), phaseInputExt )
78
79
import Config
import CmdLineParser
Ian Lynagh's avatar
Ian Lynagh committed
80
import Constants        ( mAX_CONTEXT_REDUCTION_DEPTH )
81
import Panic
82
import UniqFM           ( UniqFM )
83
import Util
84
import Maybes           ( orElse )
85
import SrcLoc
86
import FastString
Simon Marlow's avatar
Simon Marlow committed
87
88
import Outputable
import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
89

Ian Lynagh's avatar
Ian Lynagh committed
90
91
import Data.IORef       ( readIORef )
import Control.Monad    ( when )
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
92

93
import Data.Char
Ian Lynagh's avatar
Ian Lynagh committed
94
import System.FilePath
95
import System.IO        ( stderr, hPutChar )
96

97
98
99
-- -----------------------------------------------------------------------------
-- DynFlags

100
-- | Enumerates the simple on-or-off dynamic flags
101
102
103
104
data DynFlag

   -- debugging flags
   = Opt_D_dump_cmm
105
   | Opt_D_dump_cmmz
106
   | Opt_D_dump_cmmz_pretty
107
   | Opt_D_dump_cps_cmm
108
   | Opt_D_dump_cvt_cmm
109
   | Opt_D_dump_asm
110
111
   | Opt_D_dump_asm_native
   | Opt_D_dump_asm_liveness
112
   | Opt_D_dump_asm_coalesce
113
114
115
   | Opt_D_dump_asm_regalloc
   | Opt_D_dump_asm_regalloc_stages
   | Opt_D_dump_asm_conflicts
116
   | Opt_D_dump_asm_stats
117
118
119
120
121
122
   | Opt_D_dump_cpranal
   | Opt_D_dump_deriv
   | Opt_D_dump_ds
   | Opt_D_dump_flatC
   | Opt_D_dump_foreign
   | Opt_D_dump_inlinings
123
   | Opt_D_dump_rule_firings
124
125
126
127
128
   | Opt_D_dump_occur_anal
   | Opt_D_dump_parsed
   | Opt_D_dump_rn
   | Opt_D_dump_simpl
   | Opt_D_dump_simpl_iterations
129
   | Opt_D_dump_simpl_phases
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
   | 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
148
   | Opt_D_dump_hpc
pepe's avatar
pepe committed
149
   | Opt_D_dump_rtti
150
151
152
153
154
155
   | 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
156
   | Opt_D_dump_mod_cycles
157
   | Opt_D_dump_view_pattern_commoning
158
   | Opt_D_faststring_stats
Ian Lynagh's avatar
Ian Lynagh committed
159
   | Opt_DumpToFile                     -- ^ Append dump output to files instead of stdout.
Simon Marlow's avatar
Simon Marlow committed
160
   | Opt_D_no_debug_output
161
162
163
   | Opt_DoCoreLinting
   | Opt_DoStgLinting
   | Opt_DoCmmLinting
Ben.Lippmeier@anu.edu.au's avatar
Ben.Lippmeier@anu.edu.au committed
164
   | Opt_DoAsmLinting
165

Ian Lynagh's avatar
Ian Lynagh committed
166
   | Opt_WarnIsError                    -- -Werror; makes warnings fatal
167
168
   | Opt_WarnDuplicateExports
   | Opt_WarnHiShadows
169
   | Opt_WarnImplicitPrelude
170
171
172
173
174
175
176
177
178
   | Opt_WarnIncompletePatterns
   | Opt_WarnIncompletePatternsRecUpd
   | Opt_WarnMissingFields
   | Opt_WarnMissingMethods
   | Opt_WarnMissingSigs
   | Opt_WarnNameShadowing
   | Opt_WarnOverlappingPatterns
   | Opt_WarnSimplePatterns
   | Opt_WarnTypeDefaults
179
   | Opt_WarnMonomorphism
180
181
182
   | Opt_WarnUnusedBinds
   | Opt_WarnUnusedImports
   | Opt_WarnUnusedMatches
Ian Lynagh's avatar
Ian Lynagh committed
183
   | Opt_WarnWarningsDeprecations
184
   | Opt_WarnDeprecatedFlags
185
186
   | Opt_WarnDodgyImports
   | Opt_WarnOrphans
187
   | Opt_WarnTabs
188
   | Opt_WarnUnrecognisedPragmas
189
   | Opt_WarnDodgyForeignImports
190
191

   -- language opts
192
193
194
   | Opt_OverlappingInstances
   | Opt_UndecidableInstances
   | Opt_IncoherentInstances
195
   | Opt_MonomorphismRestriction
196
   | Opt_MonoPatBinds
Ian Lynagh's avatar
Ian Lynagh committed
197
   | Opt_ExtendedDefaultRules           -- Use GHC's extended rules for defaulting
198
   | Opt_ForeignFunctionInterface
Ian Lynagh's avatar
Ian Lynagh committed
199
   | Opt_UnliftedFFITypes
Ian Lynagh's avatar
Ian Lynagh committed
200
201
   | Opt_PArr                           -- Syntactic support for parallel arrays
   | Opt_Arrows                         -- Arrow-notation syntax
202
   | Opt_TemplateHaskell
203
   | Opt_QuasiQuotes
204
   | Opt_ImplicitParams
205
   | Opt_Generics			-- "Derivable type classes"
Ian Lynagh's avatar
Ian Lynagh committed
206
   | Opt_ImplicitPrelude
207
   | Opt_ScopedTypeVariables
Ian Lynagh's avatar
Ian Lynagh committed
208
   | Opt_UnboxedTuples
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
209
   | Opt_BangPatterns
210
   | Opt_TypeFamilies
211
   | Opt_OverloadedStrings
212
   | Opt_DisambiguateRecordFields
213
   | Opt_RecordWildCards
214
   | Opt_RecordPuns
215
   | Opt_ViewPatterns
216
   | Opt_GADTs
217
   | Opt_RelaxedPolyRec
218
   | Opt_StandaloneDeriving
219
   | Opt_DeriveDataTypeable
220
   | Opt_TypeSynonymInstances
Ian Lynagh's avatar
Ian Lynagh committed
221
   | Opt_FlexibleContexts
222
   | Opt_FlexibleInstances
223
   | Opt_ConstrainedClassMethods
Ian Lynagh's avatar
Ian Lynagh committed
224
   | Opt_MultiParamTypeClasses
225
   | Opt_FunctionalDependencies
Ian Lynagh's avatar
Ian Lynagh committed
226
   | Opt_UnicodeSyntax
Ian Lynagh's avatar
Ian Lynagh committed
227
   | Opt_PolymorphicComponents
228
   | Opt_ExistentialQuantification
229
   | Opt_MagicHash
Ian Lynagh's avatar
Ian Lynagh committed
230
   | Opt_EmptyDataDecls
Ian Lynagh's avatar
Ian Lynagh committed
231
   | Opt_KindSignatures
Ian Lynagh's avatar
Ian Lynagh committed
232
   | Opt_ParallelListComp
233
   | Opt_TransformListComp
234
   | Opt_GeneralizedNewtypeDeriving
Ian Lynagh's avatar
Ian Lynagh committed
235
   | Opt_RecursiveDo
236
   | Opt_PostfixOperators
Ian Lynagh's avatar
Ian Lynagh committed
237
   | Opt_PatternGuards
238
   | Opt_LiberalTypeSynonyms
239
240
   | Opt_Rank2Types
   | Opt_RankNTypes
241
   | Opt_ImpredicativeTypes
Ian Lynagh's avatar
Ian Lynagh committed
242
   | Opt_TypeOperators
243
   | Opt_PackageImports
244
   | Opt_NewQualifiedOperators
245

246
247
   | Opt_PrintExplicitForalls

248
249
250
   -- optimisation opts
   | Opt_Strictness
   | Opt_FullLaziness
251
   | Opt_StaticArgumentTransformation
252
   | Opt_CSE
253
254
   | Opt_LiberateCase
   | Opt_SpecConstr
255
256
257
258
259
260
261
   | Opt_IgnoreInterfacePragmas
   | Opt_OmitInterfacePragmas
   | Opt_DoLambdaEtaExpansion
   | Opt_IgnoreAsserts
   | Opt_DoEtaReduction
   | Opt_CaseMerge
   | Opt_UnboxStrictFields
262
   | Opt_MethodSharing
263
   | Opt_DictsCheap
264
   | Opt_EnableRewriteRules		-- Apply rewrite rules during simplification
rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
265
   | Opt_Vectorise
Ian Lynagh's avatar
Ian Lynagh committed
266
267
   | Opt_RegsGraph                      -- do graph coloring register allocation
   | Opt_RegsIterative                  -- do iterative coalescing graph coloring register allocation
268
269
270
271

   -- misc opts
   | Opt_Cpp
   | Opt_Pp
272
   | Opt_ForceRecomp
273
274
275
276
277
278
279
   | Opt_DryRun
   | Opt_DoAsmMangling
   | Opt_ExcessPrecision
   | Opt_ReadUserPackageConf
   | Opt_NoHsMain
   | Opt_SplitObjs
   | Opt_StgStats
280
   | Opt_HideAllPackages
281
   | Opt_PrintBindResult
282
   | Opt_Haddock
David Waern's avatar
David Waern committed
283
   | Opt_HaddockOptions
284
   | Opt_Hpc_No_Auto
285
   | Opt_BreakOnException
286
   | Opt_BreakOnError
287
   | Opt_PrintEvldWithShow
288
   | Opt_PrintBindContents
289
290
   | Opt_GenManifest
   | Opt_EmbedManifest
291
292
   | Opt_RunCPSZ
   | Opt_ConvertToZipCfgAndBack
293
   | Opt_AutoLinkPackages
294
   | Opt_ImplicitImportQualified
295
296
297
298
299
300
301

   -- keeping stuff
   | Opt_KeepHiDiffs
   | Opt_KeepHcFiles
   | Opt_KeepSFiles
   | Opt_KeepRawSFiles
   | Opt_KeepTmpFiles
Jedai's avatar
Jedai committed
302
   | Opt_KeepRawTokenStream
303

304
   deriving (Eq, Show)
Ian Lynagh's avatar
Ian Lynagh committed
305

306
307
-- | Contains not only a collection of 'DynFlag's but also a plethora of
-- information relating to the compilation of a single file or GHC session
308
data DynFlags = DynFlags {
Ian Lynagh's avatar
Ian Lynagh committed
309
310
311
312
313
  ghcMode               :: GhcMode,
  ghcLink               :: GhcLink,
  coreToDo              :: Maybe [CoreToDo], -- reserved for -Ofile
  stgToDo               :: Maybe [StgToDo],  -- similarly
  hscTarget             :: HscTarget,
314
  hscOutName            :: String,      -- ^ Name of the output file
315
  extCoreName           :: String,      -- ^ Name of the .hcr output file
316
317
318
319
  verbosity             :: Int,         -- ^ Verbosity level: see "DynFlags#verbosity_levels"
  optLevel              :: Int,         -- ^ Optimisation level
  simplPhases           :: Int,         -- ^ Number of simplifier phases
  maxSimplIterations    :: Int,         -- ^ Max simplifier iterations
320
  shouldDumpSimplPhase  :: SimplifierMode -> Bool,
Ian Lynagh's avatar
Ian Lynagh committed
321
  ruleCheck             :: Maybe String,
322

323
324
325
  specConstrThreshold   :: Maybe Int,   -- ^ Threshold for SpecConstr
  specConstrCount       :: Maybe Int,   -- ^ Max number of specialisations for any one function
  liberateCaseThreshold :: Maybe Int,   -- ^ Threshold for LiberateCase
326

Ian Lynagh's avatar
Ian Lynagh committed
327
  stolen_x86_regs       :: Int,
328
  cmdlineHcIncludes     :: [String],    -- ^ @\-\#includes@
Ian Lynagh's avatar
Ian Lynagh committed
329
330
331
  importPaths           :: [FilePath],
  mainModIs             :: Module,
  mainFunIs             :: Maybe String,
332
  ctxtStkDepth          :: Int,         -- ^ Typechecker context stack depth
333

334
335
  dphBackend            :: DPHBackend,

336
  thisPackage           :: PackageId,   -- ^ name of package currently being compiled
337
338

  -- ways
339
340
341
  wayNames              :: [WayName],   -- ^ Way flags from the command line
  buildTag              :: String,      -- ^ The global \"way\" (e.g. \"p\" for prof)
  rtsBuildTag           :: String,      -- ^ The RTS \"way\"
Ian Lynagh's avatar
Ian Lynagh committed
342

343
  -- paths etc.
Ian Lynagh's avatar
Ian Lynagh committed
344
345
346
  objectDir             :: Maybe String,
  hiDir                 :: Maybe String,
  stubDir               :: Maybe String,
347

Ian Lynagh's avatar
Ian Lynagh committed
348
349
350
  objectSuf             :: String,
  hcSuf                 :: String,
  hiSuf                 :: String,
351

Ian Lynagh's avatar
Ian Lynagh committed
352
353
354
  outputFile            :: Maybe String,
  outputHi              :: Maybe String,
  dynLibLoader          :: DynLibLoader,
355

356
  -- | This is set by 'DriverPipeline.runPipeline' based on where
Ian Lynagh's avatar
Ian Lynagh committed
357
358
  --    its output is going.
  dumpPrefix            :: Maybe FilePath,
359

360
361
  -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
  --    Set by @-ddump-file-prefix@
Ian Lynagh's avatar
Ian Lynagh committed
362
363
364
365
366
367
368
369
  dumpPrefixForce       :: Maybe FilePath,

  includePaths          :: [String],
  libraryPaths          :: [String],
  frameworkPaths        :: [String],    -- used on darwin only
  cmdlineFrameworks     :: [String],    -- ditto
  tmpDir                :: String,      -- no trailing '/'

370
371
372
  ghcUsagePath          :: FilePath,    -- Filled in by SysTools
  ghciUsagePath         :: FilePath,    -- ditto

373
  hpcDir                :: String,      -- ^ Path to store the .mix files
andy@galois.com's avatar
andy@galois.com committed
374

375
  -- options for particular phases
Ian Lynagh's avatar
Ian Lynagh committed
376
377
378
379
380
381
382
383
  opt_L                 :: [String],
  opt_P                 :: [String],
  opt_F                 :: [String],
  opt_c                 :: [String],
  opt_m                 :: [String],
  opt_a                 :: [String],
  opt_l                 :: [String],
  opt_windres           :: [String],
384
385

  -- commands for particular phases
Ian Lynagh's avatar
Ian Lynagh committed
386
387
388
389
390
391
392
393
394
  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]),
395
396
  pgm_T                 :: String,
  pgm_sysman            :: String,
397
  pgm_windres           :: String,
398

399
400
401
402
403
404
405
  --  For ghc -M
  depMakefile           :: FilePath,
  depIncludePkgDeps     :: Bool,
  depExcludeMods        :: [ModuleName],
  depSuffixes           :: [String],
  depWarnings           :: Bool,

406
  --  Package flags
Ian Lynagh's avatar
Ian Lynagh committed
407
  extraPkgConfs         :: [FilePath],
408
409
  topDir                :: FilePath,    -- filled in by SysTools
  systemPackageConfig   :: FilePath,    -- ditto
410
        -- ^ The @-package-conf@ flags given on the command line, in the order
Ian Lynagh's avatar
Ian Lynagh committed
411
        -- they appeared.
412

Ian Lynagh's avatar
Ian Lynagh committed
413
  packageFlags          :: [PackageFlag],
414
        -- ^ The @-package@ and @-hide-package@ flags from the command-line
415

416
  -- Package state
Ian Lynagh's avatar
Ian Lynagh committed
417
  -- NB. do not modify this field, it is calculated by
418
  -- Packages.initPackages and Packages.updatePackages.
419
  pkgDatabase           :: Maybe (UniqFM PackageConfig),
Ian Lynagh's avatar
Ian Lynagh committed
420
  pkgState              :: PackageState,
421
422

  -- hsc dynamic flags
Ian Lynagh's avatar
Ian Lynagh committed
423
424
  flags                 :: [DynFlag],

425
  -- | Message output action: use "ErrUtils" instead of this if you can
David Waern's avatar
David Waern committed
426
427
428
  log_action            :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),

  haddockOptions :: Maybe String
429
430
431
432
433
434
435
436
437
438
 }

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

439
-- | Will this target result in an object file on the disk?
440
441
442
443
444
445
446
447
448
449
450
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.
451
data GhcMode
452
453
454
  = CompManager         -- ^ @\-\-make@, GHCi, etc.
  | OneShot             -- ^ @ghc -c Foo.hs@
  | MkDepend            -- ^ @ghc -M@, see "Finder" for why we need this
455
456
  deriving Eq

457
458
459
460
461
instance Outputable GhcMode where
  ppr CompManager = ptext (sLit "CompManager")
  ppr OneShot     = ptext (sLit "OneShot")
  ppr MkDepend    = ptext (sLit "MkDepend")

462
463
464
465
isOneShot :: GhcMode -> Bool
isOneShot OneShot = True
isOneShot _other  = False

466
467
468
469
470
471
-- | What to do in the link step, if there is one.
data GhcLink
  = 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)
472
  deriving (Eq, Show)
473
474
475

isNoLink :: GhcLink -> Bool
isNoLink NoLink = True
twanvl's avatar
twanvl committed
476
isNoLink _      = False
477
478
479
480
481

data PackageFlag
  = ExposePackage  String
  | HidePackage    String
  | IgnorePackage  String
482
  deriving Eq
483

twanvl's avatar
twanvl committed
484
defaultHscTarget :: HscTarget
485
486
defaultHscTarget = defaultObjectTarget

487
-- | The 'HscTarget' value corresponding to the default way to create
488
-- object files on the current platform.
twanvl's avatar
twanvl committed
489
defaultObjectTarget :: HscTarget
490
defaultObjectTarget
Ian Lynagh's avatar
Ian Lynagh committed
491
492
  | cGhcWithNativeCodeGen == "YES"      =  HscAsm
  | otherwise                           =  HscC
493

494
495
496
497
498
499
data DynLibLoader
  = Deployable
  | Wrapped (Maybe String)
  | SystemDependent
  deriving Eq

500
-- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
twanvl's avatar
twanvl committed
501
initDynFlags :: DynFlags -> IO DynFlags
502
503
504
505
506
507
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
508
509
510
511
        wayNames        = ways,
        buildTag        = build_tag,
        rtsBuildTag     = rts_build_tag
        }
512

513
514
-- | The normal 'DynFlags'. Note that they is not suitable for use in this form
-- and must be fully initialized by 'GHC.newSession' first.
twanvl's avatar
twanvl committed
515
defaultDynFlags :: DynFlags
516
517
defaultDynFlags =
     DynFlags {
Ian Lynagh's avatar
Ian Lynagh committed
518
519
520
521
522
523
524
525
526
        ghcMode                 = CompManager,
        ghcLink                 = LinkBinary,
        coreToDo                = Nothing,
        stgToDo                 = Nothing,
        hscTarget               = defaultHscTarget,
        hscOutName              = "",
        extCoreName             = "",
        verbosity               = 0,
        optLevel                = 0,
527
        simplPhases             = 2,
Ian Lynagh's avatar
Ian Lynagh committed
528
        maxSimplIterations      = 4,
529
        shouldDumpSimplPhase    = const False,
Ian Lynagh's avatar
Ian Lynagh committed
530
531
532
        ruleCheck               = Nothing,
        specConstrThreshold     = Just 200,
        specConstrCount         = Just 3,
533
        liberateCaseThreshold   = Just 200,
Ian Lynagh's avatar
Ian Lynagh committed
534
535
536
537
538
539
540
        stolen_x86_regs         = 4,
        cmdlineHcIncludes       = [],
        importPaths             = ["."],
        mainModIs               = mAIN,
        mainFunIs               = Nothing,
        ctxtStkDepth            = mAX_CONTEXT_REDUCTION_DEPTH,

541
542
        dphBackend              = DPHPar,

Ian Lynagh's avatar
Ian Lynagh committed
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
        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                   = [],
575
        opt_windres             = [],
Ian Lynagh's avatar
Ian Lynagh committed
576
577
578

        extraPkgConfs           = [],
        packageFlags            = [],
579
580
        pkgDatabase             = Nothing,
        pkgState                = panic "no package state yet: call GHC.setSessionDynFlags",
Ian Lynagh's avatar
Ian Lynagh committed
581
582
583
584
585
586
587
        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",
588
        systemPackageConfig     = panic  "no systemPackageConfig: call GHC.setSessionDynFlags",
Ian Lynagh's avatar
Ian Lynagh committed
589
590
591
592
593
594
595
596
597
598
599
600
601
        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
602
603
604
605
606
607
608
        -- ghc -M values
        depMakefile       = "Makefile",
        depIncludePkgDeps = False,
        depExcludeMods    = [],
        depSuffixes       = [],
        depWarnings       = True,
        -- end of ghc -M values
Ian Lynagh's avatar
Ian Lynagh committed
609
        haddockOptions = Nothing,
610
        flags = [
611
            Opt_AutoLinkPackages,
612
613
614
615
616
617
618
619
620
            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,

621
622
            Opt_MethodSharing,

623
624
            Opt_DoAsmMangling,

625
            Opt_GenManifest,
626
627
            Opt_EmbedManifest,
            Opt_PrintBindContents
628
629
630
631
632
            ]
            ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
                    -- The default -O0 options
            ++ standardWarnings,

Ian Lynagh's avatar
Ian Lynagh committed
633
        log_action = \severity srcSpan style msg ->
634
                        case severity of
635
636
637
638
639
640
641
642
                          SevInfo  -> printErrs (msg style)
                          SevFatal -> printErrs (msg style)
                          _        -> do 
                                hPutChar stderr '\n'
                                printErrs ((mkLocMessage srcSpan msg) style)
                     -- careful (#2302): printErrs prints in UTF-8, whereas
                     -- converting to string first and using hPutStr would
                     -- just emit the low 8 bits of each unicode char.
643
644
      }

Ian Lynagh's avatar
Ian Lynagh committed
645
{-
646
    #verbosity_levels#
647
    Verbosity levels:
Ian Lynagh's avatar
Ian Lynagh committed
648
649

    0   |   print errors & warnings only
650
651
652
653
654
655
656
    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"
-}

657
-- | Test whether a 'DynFlag' is set
658
659
660
dopt :: DynFlag -> DynFlags -> Bool
dopt f dflags  = f `elem` (flags dflags)

661
-- | Set a 'DynFlag'
662
663
664
dopt_set :: DynFlags -> DynFlag -> DynFlags
dopt_set dfs f = dfs{ flags = f : flags dfs }

665
-- | Unset a 'DynFlag'
666
667
668
dopt_unset :: DynFlags -> DynFlag -> DynFlags
dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }

669
670
671
672
-- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
getOpts :: DynFlags             -- ^ 'DynFlags' to retrieve the options from
        -> (DynFlags -> [a])    -- ^ Relevant record accessor: one of the @opt_*@ accessors
        -> [a]                  -- ^ Correctly ordered extracted options
673
getOpts dflags opts = reverse (opts dflags)
Ian Lynagh's avatar
Ian Lynagh committed
674
        -- We add to the options from the front, so we need to reverse the list
675

676
677
-- | Gets the verbosity flag for the current verbosity level. This is fed to
-- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
678
getVerbFlag :: DynFlags -> String
Ian Lynagh's avatar
Ian Lynagh committed
679
680
getVerbFlag dflags
  | verbosity dflags >= 3  = "-v"
681
682
  | otherwise =  ""

twanvl's avatar
twanvl committed
683
684
setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
         setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
685
         addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
twanvl's avatar
twanvl committed
686
687
688
689
690
         addCmdlineFramework, addHaddockOpts
   :: String -> DynFlags -> DynFlags
setOutputFile, setOutputHi, setDumpPrefixForce
   :: Maybe String -> DynFlags -> DynFlags

691
692
693
694
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
Thomas Schilling's avatar
Thomas Schilling committed
695
  -- \#included from the .hc file when compiling with -fvia-C.
696

697
698
setObjectSuf  f d = d{ objectSuf  = f}
setHiSuf      f d = d{ hiSuf      = f}
699
700
701
702
setHcSuf      f d = d{ hcSuf      = f}

setOutputFile f d = d{ outputFile = f}
setOutputHi   f d = d{ outputHi   = f}
703

704
705
706
707
708
709
710
711
712
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"

713
714
setDumpPrefixForce f d = d { dumpPrefixForce = f}

715
716
717
718
719
720
721
722
723
724
725
726
-- 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,[])}
727
setPgmwindres f d = d{ pgm_windres = f}
728
729
730
731
732
733
734
735

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}
736
addOptwindres f d = d{ opt_windres = f : opt_windres d}
737

738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
setDepMakefile :: FilePath -> DynFlags -> DynFlags
setDepMakefile f d = d { depMakefile = deOptDep f }

setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }

addDepExcludeMod :: String -> DynFlags -> DynFlags
addDepExcludeMod m d
    = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }

addDepSuffix :: FilePath -> DynFlags -> DynFlags
addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }

setDepWarnings :: Bool -> DynFlags -> DynFlags
setDepWarnings b d = d { depWarnings = b }

-- XXX Legacy code:
-- We used to use "-optdep-flag -optdeparg", so for legacy applications
-- we need to strip the "-optdep" off of the arg
deOptDep :: String -> String
deOptDep x = case maybePrefixMatch "-optdep" x of
             Just rest -> rest
             Nothing -> x

762
763
addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}

David Waern's avatar
David Waern committed
764
765
addHaddockOpts f d = d{ haddockOptions = Just f}

766
767
768
-- -----------------------------------------------------------------------------
-- Command-line options

769
-- | When invoking external tools as part of the compilation pipeline, we
770
771
-- 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
772
-- between filepaths and 'other stuff'. The reason for this is that
773
-- this type gives us a handle on transforming filenames, and filenames only,
774
-- to whatever format they're expected to be on a particular platform.
775
776
data Option
 = FileOption -- an entry that _contains_ filename(s) / filepaths.
Ian Lynagh's avatar
Ian Lynagh committed
777
778
779
              String  -- a non-filepath prefix that shouldn't be
                      -- transformed (e.g., "/out=")
              String  -- the filepath/filename portion
780
 | Option     String
Ian Lynagh's avatar
Ian Lynagh committed
781

782
783
784
785
-----------------------------------------------------------------------------
-- Setting the optimisation level

updOptLevel :: Int -> DynFlags -> DynFlags
786
-- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
787
updOptLevel n dfs
788
  = dfs2{ optLevel = final_n }
789
  where
Ian Lynagh's avatar
Ian Lynagh committed
790
   final_n = max 0 (min 2 n)    -- Clamp to 0 <= n <= 2
791
792
793
   dfs1 = foldr (flip dopt_unset) dfs  remove_dopts
   dfs2 = foldr (flip dopt_set)   dfs1 extra_dopts

794
795
   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
796

797
798
optLevelFlags :: [([Int], DynFlag)]
optLevelFlags
Ian Lynagh's avatar
Ian Lynagh committed
799
  = [ ([0],     Opt_IgnoreInterfacePragmas)
800
    , ([0],     Opt_OmitInterfacePragmas)
801

Ian Lynagh's avatar
Ian Lynagh committed
802
    , ([1,2],   Opt_IgnoreAsserts)
803
804
    , ([1,2],   Opt_EnableRewriteRules)  -- Off for -O0; see Note [Scoping for Builtin rules]
                                         --              in PrelRules
Ian Lynagh's avatar
Ian Lynagh committed
805
806
807
808
809
    , ([1,2],   Opt_DoEtaReduction)
    , ([1,2],   Opt_CaseMerge)
    , ([1,2],   Opt_Strictness)
    , ([1,2],   Opt_CSE)
    , ([1,2],   Opt_FullLaziness)
810

Ian Lynagh's avatar
Ian Lynagh committed
811
812
    , ([2],     Opt_LiberateCase)
    , ([2],     Opt_SpecConstr)
813
814
815
816
817
818
819
820
821
822

--     , ([2],     Opt_StaticArgumentTransformation)
-- Max writes: I think it's probably best not to enable SAT with -O2 for the
-- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
-- several improvements to the heuristics, and I'm concerned that without
-- those changes SAT will interfere with some attempts to write "high
-- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
-- this year. In particular, the version in HEAD lacks the tail call
-- criterion, so many things that look like reasonable loops will be
-- turned into functions with extra (unneccesary) thunk creation.
823
824

    , ([0,1,2], Opt_DoLambdaEtaExpansion)
Ian Lynagh's avatar
Ian Lynagh committed
825
826
827
828
                -- 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.
829
830
831
832
833
    ]

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

twanvl's avatar
twanvl committed
834
standardWarnings :: [DynFlag]
835
standardWarnings
Ian Lynagh's avatar
Ian Lynagh committed
836
    = [ Opt_WarnWarningsDeprecations,
837
        Opt_WarnDeprecatedFlags,
838
        Opt_WarnUnrecognisedPragmas,
Ian Lynagh's avatar
Ian Lynagh committed
839
840
841
        Opt_WarnOverlappingPatterns,
        Opt_WarnMissingFields,
        Opt_WarnMissingMethods,
842
843
        Opt_WarnDuplicateExports,
        Opt_WarnDodgyForeignImports
844
845
      ]

twanvl's avatar
twanvl committed
846
minusWOpts :: [DynFlag]
847
minusWOpts
Ian Lynagh's avatar
Ian Lynagh committed
848
849
850
851
852
853
    = standardWarnings ++
      [ Opt_WarnUnusedBinds,
        Opt_WarnUnusedMatches,
        Opt_WarnUnusedImports,
        Opt_WarnIncompletePatterns,
        Opt_WarnDodgyImports
854
855
      ]

twanvl's avatar
twanvl committed
856
minusWallOpts :: [DynFlag]
857
858
minusWallOpts
    = minusWOpts ++
Ian Lynagh's avatar
Ian Lynagh committed
859
860
861
862
863
      [ Opt_WarnTypeDefaults,
        Opt_WarnNameShadowing,
        Opt_WarnMissingSigs,
        Opt_WarnHiShadows,
        Opt_WarnOrphans
864
865
      ]

866
-- minuswRemovesOpts should be every warning option
twanvl's avatar
twanvl committed
867
minuswRemovesOpts :: [DynFlag]
868
869
870
871
872
873
minuswRemovesOpts
    = minusWallOpts ++
      [Opt_WarnImplicitPrelude,
       Opt_WarnIncompletePatternsRecUpd,
       Opt_WarnSimplePatterns,
       Opt_WarnMonomorphism,
874
       Opt_WarnUnrecognisedPragmas,
875
876
877
       Opt_WarnTabs
      ]

878
879
880
-- -----------------------------------------------------------------------------
-- CoreToDo:  abstraction of core-to-core passes to run.

Ian Lynagh's avatar
Ian Lynagh committed
881
882
883
data CoreToDo           -- These are diff core-to-core passes,
                        -- which may be invoked in any order,
                        -- as many times as you like.
884

Ian Lynagh's avatar
Ian Lynagh committed
885
886
887
888
889
  = CoreDoSimplify      -- The core-to-core simplifier.
        SimplifierMode
        [SimplifierSwitch]
                        -- Each run of the simplifier can take a different
                        -- set of simplifier-specific flags.
890
891
892
893
894
895
896
897
898
899
900
901
  | CoreDoFloatInwards
  | CoreDoFloatOutwards FloatOutSwitches
  | CoreLiberateCase
  | CoreDoPrintCore
  | CoreDoStaticArgs
  | CoreDoStrictness
  | CoreDoWorkerWrapper
  | CoreDoSpecialising
  | CoreDoSpecConstr
  | CoreDoOldStrictness
  | CoreDoGlomBinds
  | CoreCSE
Ian Lynagh's avatar
Ian Lynagh committed
902
903
  | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
                                                -- matching this string
904
  | CoreDoVectorisation PackageId
Ian Lynagh's avatar
Ian Lynagh committed
905
906
  | CoreDoNothing                -- Useful when building up
  | CoreDoPasses [CoreToDo]      -- lists of these things
907

Ian Lynagh's avatar
Ian Lynagh committed
908
data SimplifierMode             -- See comments in SimplMonad
909
  = SimplGently
910
  | SimplPhase Int [String]
911
912
913
914
915
916

data SimplifierSwitch
  = MaxSimplifierIterations Int
  | NoCaseOfCase

data FloatOutSwitches
Ian Lynagh's avatar
Ian Lynagh committed
917
918
919
  = FloatOutSw  Bool    -- True <=> float lambdas to top level
                Bool    -- True <=> float constants to top level,
                        --          even if they do not escape a lambda
920
921
922


-- The core-to-core pass ordering is derived from the DynFlags:
923
924
runWhen :: Bool -> CoreToDo -> CoreToDo
runWhen True  do_this = do_this
twanvl's avatar
twanvl committed
925
runWhen False _       = CoreDoNothing
926

927
928
929
930
runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
runMaybe (Just x) f = f x
runMaybe Nothing  _ = CoreDoNothing

931
932
933
934
935
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
936
    opt_level     = optLevel dflags
937
    phases        = simplPhases dflags
Ian Lynagh's avatar
Ian Lynagh committed
938
    max_iter      = maxSimplIterations dflags
939
940
941
    strictness    = dopt Opt_Strictness dflags
    full_laziness = dopt Opt_FullLaziness dflags
    cse           = dopt Opt_CSE dflags
942
943
    spec_constr   = dopt Opt_SpecConstr dflags
    liberate_case = dopt Opt_LiberateCase dflags
944
    rule_check    = ruleCheck dflags
945
    static_args   = dopt Opt_StaticArgumentTransformation dflags
946

947
    maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
948

949
950
951
952
953
954
955
    simpl_phase phase names iter
      = CoreDoPasses
          [ CoreDoSimplify (SimplPhase phase names) [
              MaxSimplifierIterations iter
            ],
            maybe_rule_check phase
          ]
956

957
958
    vectorisation
      = runWhen (dopt Opt_Vectorise dflags)
959
        $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
960
961


962
963
                -- By default, we have 2 phases before phase 0.

Ian Lynagh's avatar
Ian Lynagh committed
964
965
966
967
                -- 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.
968

Ian Lynagh's avatar
Ian Lynagh committed
969
970
971
972
                -- 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
973
    simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
974
975
                                  | phase <- [phases, phases-1 .. 1] ]

976

Ian Lynagh's avatar
Ian Lynagh committed
977
        -- initial simplify: mk specialiser happy: minimum effort please
978
    simpl_gently = CoreDoSimplify SimplGently [
Ian Lynagh's avatar
Ian Lynagh committed
979
980
981
982
983
984
985
986
987
988
989
990
991
992
                        --      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
        ]
993

rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
994
    core_todo =
995
     if opt_level == 0 then
996
       [vectorisation,
rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
997
        simpl_phase 0 ["final"] max_iter]
Ian Lynagh's avatar
Ian Lynagh committed
998
     else {- opt_level >= 1 -} [
999

1000
1001
1002
1003
    -- 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
1004
        runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1005

1006
1007
        -- We run vectorisation here for now, but we might also try to run
        -- it later
1008
1009
1010
1011
        vectorisation,

        -- initial simplify: mk specialiser happy: minimum effort please
        simpl_gently,
1012

Ian Lynagh's avatar
Ian Lynagh committed
1013
1014
1015
        -- Specialisation is best done before full laziness
        -- so that overloaded functions have all their dictionary lambdas manifest
        CoreDoSpecialising,
1016

Ian Lynagh's avatar
Ian Lynagh committed
1017
        runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1018

Ian Lynagh's avatar
Ian Lynagh committed
1019
        CoreDoFloatInwards,
1020

1021
        simpl_phases,
1022

Ian Lynagh's avatar
Ian Lynagh committed
1023
1024
                -- Phase 0: allow all Ids to be inlined now
                -- This gets foldr inlined before strictness analysis
1025

Ian Lynagh's avatar
Ian Lynagh committed
1026
1027
1028
1029
1030
1031
1032
1033
                -- 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),
1034
1035
1036


#ifdef OLD_STRICTNESS
Ian Lynagh's avatar
Ian Lynagh committed
1037
        CoreDoOldStrictness,
1038
#endif
Ian Lynagh's avatar
Ian Lynagh committed
1039
1040
1041
1042
        runWhen strictness (CoreDoPasses [
                CoreDoStrictness,
                CoreDoWorkerWrapper,
                CoreDoGlomBinds,
1043
                simpl_phase 0 ["post-worker-wrapper"] max_iter
1044
                ]),