Breakpoint code instrumentation
[ghc.git] / compiler / main / DynFlags.hs
1 {-# OPTIONS -fno-warn-missing-fields #-}
2 -----------------------------------------------------------------------------
3 --
4 -- Dynamic flags
5 --
6 -- Most flags are dynamic flags, which means they can change from
7 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
8 -- multi-session GHC each session can be using different dynamic
9 -- flags. Dynamic flags can also be set at the prompt in GHCi.
10 --
11 -- (c) The University of Glasgow 2005
12 --
13 -----------------------------------------------------------------------------
14
15 module DynFlags (
16 -- Dynamic flags
17 DynFlag(..),
18 DynFlags(..),
19 HscTarget(..),
20 GhcMode(..), isOneShot,
21 GhcLink(..), isNoLink,
22 PackageFlag(..),
23 Option(..),
24
25 -- Configuration of the core-to-core and stg-to-stg phases
26 CoreToDo(..),
27 StgToDo(..),
28 SimplifierSwitch(..),
29 SimplifierMode(..), FloatOutSwitches(..),
30 getCoreToDo, getStgToDo,
31
32 -- Manipulating DynFlags
33 defaultDynFlags, -- DynFlags
34 initDynFlags, -- DynFlags -> IO DynFlags
35
36 dopt, -- DynFlag -> DynFlags -> Bool
37 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
38 getOpts, -- (DynFlags -> [a]) -> IO [a]
39 getVerbFlag,
40 updOptLevel,
41 setTmpDir,
42 setPackageName,
43
44 -- parsing DynFlags
45 parseDynamicFlags,
46 allFlags,
47
48 -- misc stuff
49 machdepCCOpts, picCCOpts
50 ) where
51
52 #include "HsVersions.h"
53
54 import Module ( Module, mkModuleName, mkModule )
55 import PackageConfig
56 import PrelNames ( mAIN )
57 #ifdef i386_TARGET_ARCH
58 import StaticFlags ( opt_Static )
59 #endif
60 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
61 v_RTS_Build_tag )
62 import {-# SOURCE #-} Packages (PackageState)
63 import DriverPhases ( Phase(..), phaseInputExt )
64 import Config
65 import CmdLineParser
66 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
67 import Panic ( panic, GhcException(..) )
68 import UniqFM ( UniqFM )
69 import Util ( notNull, splitLongestPrefix, normalisePath )
70 import Maybes ( fromJust, orElse )
71 import SrcLoc ( SrcSpan )
72 import Outputable
73 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
74
75 import Data.IORef ( readIORef )
76 import Control.Exception ( throwDyn )
77 import Control.Monad ( when )
78 #ifdef mingw32_TARGET_OS
79 import Data.List ( isPrefixOf )
80 #else
81 import Util ( split )
82 #endif
83
84 import Data.Char ( isDigit, isUpper )
85 import System.IO ( hPutStrLn, stderr )
86
87 import Breakpoints ( BkptHandler )
88 import Module ( ModuleName )
89
90 -- -----------------------------------------------------------------------------
91 -- DynFlags
92
93 data DynFlag
94
95 -- debugging flags
96 = Opt_D_dump_cmm
97 | Opt_D_dump_asm
98 | Opt_D_dump_cpranal
99 | Opt_D_dump_deriv
100 | Opt_D_dump_ds
101 | Opt_D_dump_flatC
102 | Opt_D_dump_foreign
103 | Opt_D_dump_inlinings
104 | Opt_D_dump_occur_anal
105 | Opt_D_dump_parsed
106 | Opt_D_dump_rn
107 | Opt_D_dump_simpl
108 | Opt_D_dump_simpl_iterations
109 | Opt_D_dump_spec
110 | Opt_D_dump_prep
111 | Opt_D_dump_stg
112 | Opt_D_dump_stranal
113 | Opt_D_dump_tc
114 | Opt_D_dump_types
115 | Opt_D_dump_rules
116 | Opt_D_dump_cse
117 | Opt_D_dump_worker_wrapper
118 | Opt_D_dump_rn_trace
119 | Opt_D_dump_rn_stats
120 | Opt_D_dump_opt_cmm
121 | Opt_D_dump_simpl_stats
122 | Opt_D_dump_tc_trace
123 | Opt_D_dump_if_trace
124 | Opt_D_dump_splices
125 | Opt_D_dump_BCOs
126 | Opt_D_dump_vect
127 | Opt_D_dump_hpc
128 | Opt_D_source_stats
129 | Opt_D_verbose_core2core
130 | Opt_D_verbose_stg2stg
131 | Opt_D_dump_hi
132 | Opt_D_dump_hi_diffs
133 | Opt_D_dump_minimal_imports
134 | Opt_D_faststring_stats
135 | Opt_DoCoreLinting
136 | Opt_DoStgLinting
137 | Opt_DoCmmLinting
138
139 | Opt_WarnIsError -- -Werror; makes warnings fatal
140 | Opt_WarnDuplicateExports
141 | Opt_WarnHiShadows
142 | Opt_WarnIncompletePatterns
143 | Opt_WarnIncompletePatternsRecUpd
144 | Opt_WarnMissingFields
145 | Opt_WarnMissingMethods
146 | Opt_WarnMissingSigs
147 | Opt_WarnNameShadowing
148 | Opt_WarnOverlappingPatterns
149 | Opt_WarnSimplePatterns
150 | Opt_WarnTypeDefaults
151 | Opt_WarnUnusedBinds
152 | Opt_WarnUnusedImports
153 | Opt_WarnUnusedMatches
154 | Opt_WarnDeprecations
155 | Opt_WarnDodgyImports
156 | Opt_WarnOrphans
157
158 -- language opts
159 | Opt_AllowOverlappingInstances
160 | Opt_AllowUndecidableInstances
161 | Opt_AllowIncoherentInstances
162 | Opt_MonomorphismRestriction
163 | Opt_MonoPatBinds
164 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
165 | Opt_GlasgowExts
166 | Opt_FFI
167 | Opt_PArr -- Syntactic support for parallel arrays
168 | Opt_Arrows -- Arrow-notation syntax
169 | Opt_TH
170 | Opt_ImplicitParams
171 | Opt_Generics
172 | Opt_ImplicitPrelude
173 | Opt_ScopedTypeVariables
174 | Opt_BangPatterns
175 | Opt_IndexedTypes
176
177 -- optimisation opts
178 | Opt_Strictness
179 | Opt_FullLaziness
180 | Opt_CSE
181 | Opt_IgnoreInterfacePragmas
182 | Opt_OmitInterfacePragmas
183 | Opt_DoLambdaEtaExpansion
184 | Opt_IgnoreAsserts
185 | Opt_IgnoreBreakpoints
186 | Opt_DoEtaReduction
187 | Opt_CaseMerge
188 | Opt_UnboxStrictFields
189 | Opt_DictsCheap
190
191 -- misc opts
192 | Opt_Cpp
193 | Opt_Pp
194 | Opt_ForceRecomp
195 | Opt_DryRun
196 | Opt_DoAsmMangling
197 | Opt_ExcessPrecision
198 | Opt_ReadUserPackageConf
199 | Opt_NoHsMain
200 | Opt_SplitObjs
201 | Opt_StgStats
202 | Opt_HideAllPackages
203 | Opt_Debugging
204 | Opt_PrintBindResult
205 | Opt_Haddock
206
207 -- keeping stuff
208 | Opt_KeepHiDiffs
209 | Opt_KeepHcFiles
210 | Opt_KeepSFiles
211 | Opt_KeepRawSFiles
212 | Opt_KeepTmpFiles
213
214 deriving (Eq)
215
216 data DynFlags = DynFlags {
217 ghcMode :: GhcMode,
218 ghcLink :: GhcLink,
219 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
220 stgToDo :: Maybe [StgToDo], -- similarly
221 hscTarget :: HscTarget,
222 hscOutName :: String, -- name of the output file
223 extCoreName :: String, -- name of the .core output file
224 verbosity :: Int, -- verbosity level
225 optLevel :: Int, -- optimisation level
226 maxSimplIterations :: Int, -- max simplifier iterations
227 ruleCheck :: Maybe String,
228 stolen_x86_regs :: Int,
229 cmdlineHcIncludes :: [String], -- -#includes
230 importPaths :: [FilePath],
231 mainModIs :: Module,
232 mainFunIs :: Maybe String,
233 ctxtStkDepth :: Int, -- Typechecker context stack depth
234
235 thisPackage :: PackageId,
236
237 -- ways
238 wayNames :: [WayName], -- way flags from the cmd line
239 buildTag :: String, -- the global "way" (eg. "p" for prof)
240 rtsBuildTag :: String, -- the RTS "way"
241
242 -- paths etc.
243 objectDir :: Maybe String,
244 hiDir :: Maybe String,
245 stubDir :: Maybe String,
246
247 objectSuf :: String,
248 hcSuf :: String,
249 hiSuf :: String,
250
251 outputFile :: Maybe String,
252 outputHi :: Maybe String,
253
254 includePaths :: [String],
255 libraryPaths :: [String],
256 frameworkPaths :: [String], -- used on darwin only
257 cmdlineFrameworks :: [String], -- ditto
258 tmpDir :: String, -- no trailing '/'
259
260 ghcUsagePath :: FilePath, -- Filled in by SysTools
261 ghciUsagePath :: FilePath, -- ditto
262
263 hpcDir :: String, -- ^ path to store the .mix files
264
265 -- options for particular phases
266 opt_L :: [String],
267 opt_P :: [String],
268 opt_F :: [String],
269 opt_c :: [String],
270 opt_m :: [String],
271 opt_a :: [String],
272 opt_l :: [String],
273 opt_dll :: [String],
274 opt_dep :: [String],
275
276 -- commands for particular phases
277 pgm_L :: String,
278 pgm_P :: (String,[Option]),
279 pgm_F :: String,
280 pgm_c :: (String,[Option]),
281 pgm_m :: (String,[Option]),
282 pgm_s :: (String,[Option]),
283 pgm_a :: (String,[Option]),
284 pgm_l :: (String,[Option]),
285 pgm_dll :: (String,[Option]),
286 pgm_T :: String,
287 pgm_sysman :: String,
288
289 -- Package flags
290 extraPkgConfs :: [FilePath],
291 topDir :: FilePath, -- filled in by SysTools
292 systemPackageConfig :: FilePath, -- ditto
293 -- The -package-conf flags given on the command line, in the order
294 -- they appeared.
295
296 packageFlags :: [PackageFlag],
297 -- The -package and -hide-package flags from the command-line
298
299 -- Package state
300 -- NB. do not modify this field, it is calculated by
301 -- Packages.initPackages and Packages.updatePackages.
302 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
303 pkgState :: PackageState,
304
305 -- hsc dynamic flags
306 flags :: [DynFlag],
307
308 -- message output
309 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
310
311 -- breakpoint handling
312 ,bkptHandler :: Maybe (BkptHandler Module)
313 }
314
315 data HscTarget
316 = HscC
317 | HscAsm
318 | HscJava
319 | HscInterpreted
320 | HscNothing
321 deriving (Eq, Show)
322
323 data GhcMode
324 = BatchCompile -- | @ghc --make Main@
325 | Interactive -- | @ghc --interactive@
326 | OneShot -- | @ghc -c Foo.hs@
327 | JustTypecheck -- | Development environemnts, refactorer, etc.
328 | MkDepend
329 deriving Eq
330
331 isOneShot :: GhcMode -> Bool
332 isOneShot OneShot = True
333 isOneShot _other = False
334
335 data GhcLink -- What to do in the link step, if there is one
336 = -- Only relevant for modes
337 -- DoMake and StopBefore StopLn
338 NoLink -- Don't link at all
339 | StaticLink -- Ordinary linker [the default]
340 | MkDLL -- Make a DLL
341
342 isNoLink :: GhcLink -> Bool
343 isNoLink NoLink = True
344 isNoLink other = False
345
346 data PackageFlag
347 = ExposePackage String
348 | HidePackage String
349 | IgnorePackage String
350 deriving Eq
351
352 defaultHscTarget
353 | cGhcWithNativeCodeGen == "YES" = HscAsm
354 | otherwise = HscC
355
356 initDynFlags dflags = do
357 -- someday these will be dynamic flags
358 ways <- readIORef v_Ways
359 build_tag <- readIORef v_Build_tag
360 rts_build_tag <- readIORef v_RTS_Build_tag
361 return dflags{
362 wayNames = ways,
363 buildTag = build_tag,
364 rtsBuildTag = rts_build_tag
365 }
366
367 defaultDynFlags =
368 DynFlags {
369 ghcMode = OneShot,
370 ghcLink = StaticLink,
371 coreToDo = Nothing,
372 stgToDo = Nothing,
373 hscTarget = defaultHscTarget,
374 hscOutName = "",
375 extCoreName = "",
376 verbosity = 0,
377 optLevel = 0,
378 maxSimplIterations = 4,
379 ruleCheck = Nothing,
380 stolen_x86_regs = 4,
381 cmdlineHcIncludes = [],
382 importPaths = ["."],
383 mainModIs = mAIN,
384 mainFunIs = Nothing,
385 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
386
387 thisPackage = mainPackageId,
388
389 objectDir = Nothing,
390 hiDir = Nothing,
391 stubDir = Nothing,
392
393 objectSuf = phaseInputExt StopLn,
394 hcSuf = phaseInputExt HCc,
395 hiSuf = "hi",
396
397 outputFile = Nothing,
398 outputHi = Nothing,
399 includePaths = [],
400 libraryPaths = [],
401 frameworkPaths = [],
402 cmdlineFrameworks = [],
403 tmpDir = cDEFAULT_TMPDIR,
404
405 hpcDir = ".hpc",
406
407 opt_L = [],
408 opt_P = [],
409 opt_F = [],
410 opt_c = [],
411 opt_a = [],
412 opt_m = [],
413 opt_l = [],
414 opt_dll = [],
415 opt_dep = [],
416
417 extraPkgConfs = [],
418 packageFlags = [],
419 pkgDatabase = Nothing,
420 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
421
422 bkptHandler = Nothing,
423 flags = [
424 Opt_ReadUserPackageConf,
425
426 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
427 -- behaviour the default, to see if anyone notices
428 -- SLPJ July 06
429
430 Opt_ImplicitPrelude,
431 Opt_MonomorphismRestriction,
432 Opt_Strictness,
433 -- strictness is on by default, but this only
434 -- applies to -O.
435 Opt_CSE, -- similarly for CSE.
436 Opt_FullLaziness, -- ...and for full laziness
437
438 Opt_DoLambdaEtaExpansion,
439 -- This one is important for a tiresome reason:
440 -- we want to make sure that the bindings for data
441 -- constructors are eta-expanded. This is probably
442 -- a good thing anyway, but it seems fragile.
443
444 Opt_DoAsmMangling,
445
446 -- and the default no-optimisation options:
447 Opt_IgnoreInterfacePragmas,
448 Opt_OmitInterfacePragmas,
449
450 -- on by default:
451 Opt_PrintBindResult
452 ] ++ standardWarnings,
453
454 log_action = \severity srcSpan style msg ->
455 case severity of
456 SevInfo -> hPutStrLn stderr (show (msg style))
457 SevFatal -> hPutStrLn stderr (show (msg style))
458 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
459 }
460
461 {-
462 Verbosity levels:
463
464 0 | print errors & warnings only
465 1 | minimal verbosity: print "compiling M ... done." for each module.
466 2 | equivalent to -dshow-passes
467 3 | equivalent to existing "ghc -v"
468 4 | "ghc -v -ddump-most"
469 5 | "ghc -v -ddump-all"
470 -}
471
472 dopt :: DynFlag -> DynFlags -> Bool
473 dopt f dflags = f `elem` (flags dflags)
474
475 dopt_set :: DynFlags -> DynFlag -> DynFlags
476 dopt_set dfs f = dfs{ flags = f : flags dfs }
477
478 dopt_unset :: DynFlags -> DynFlag -> DynFlags
479 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
480
481 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
482 getOpts dflags opts = reverse (opts dflags)
483 -- We add to the options from the front, so we need to reverse the list
484
485 getVerbFlag :: DynFlags -> String
486 getVerbFlag dflags
487 | verbosity dflags >= 3 = "-v"
488 | otherwise = ""
489
490 setObjectDir f d = d{ objectDir = f}
491 setHiDir f d = d{ hiDir = f}
492 setStubDir f d = d{ stubDir = f}
493
494 setObjectSuf f d = d{ objectSuf = f}
495 setHiSuf f d = d{ hiSuf = f}
496 setHcSuf f d = d{ hcSuf = f}
497
498 setOutputFile f d = d{ outputFile = f}
499 setOutputHi f d = d{ outputHi = f}
500
501 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
502 -- Config.hs should really use Option.
503 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
504
505 setPgmL f d = d{ pgm_L = f}
506 setPgmF f d = d{ pgm_F = f}
507 setPgmc f d = d{ pgm_c = (f,[])}
508 setPgmm f d = d{ pgm_m = (f,[])}
509 setPgms f d = d{ pgm_s = (f,[])}
510 setPgma f d = d{ pgm_a = (f,[])}
511 setPgml f d = d{ pgm_l = (f,[])}
512 setPgmdll f d = d{ pgm_dll = (f,[])}
513
514 addOptL f d = d{ opt_L = f : opt_L d}
515 addOptP f d = d{ opt_P = f : opt_P d}
516 addOptF f d = d{ opt_F = f : opt_F d}
517 addOptc f d = d{ opt_c = f : opt_c d}
518 addOptm f d = d{ opt_m = f : opt_m d}
519 addOpta f d = d{ opt_a = f : opt_a d}
520 addOptl f d = d{ opt_l = f : opt_l d}
521 addOptdll f d = d{ opt_dll = f : opt_dll d}
522 addOptdep f d = d{ opt_dep = f : opt_dep d}
523
524 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
525
526 -- -----------------------------------------------------------------------------
527 -- Command-line options
528
529 -- When invoking external tools as part of the compilation pipeline, we
530 -- pass these a sequence of options on the command-line. Rather than
531 -- just using a list of Strings, we use a type that allows us to distinguish
532 -- between filepaths and 'other stuff'. [The reason being, of course, that
533 -- this type gives us a handle on transforming filenames, and filenames only,
534 -- to whatever format they're expected to be on a particular platform.]
535
536 data Option
537 = FileOption -- an entry that _contains_ filename(s) / filepaths.
538 String -- a non-filepath prefix that shouldn't be
539 -- transformed (e.g., "/out=")
540 String -- the filepath/filename portion
541 | Option String
542
543 -----------------------------------------------------------------------------
544 -- Setting the optimisation level
545
546 updOptLevel :: Int -> DynFlags -> DynFlags
547 -- Set dynflags appropriate to the optimisation level
548 updOptLevel n dfs
549 = dfs2{ optLevel = n }
550 where
551 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
552 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
553
554 extra_dopts
555 | n == 0 = opt_0_dopts
556 | otherwise = opt_1_dopts
557
558 remove_dopts
559 | n == 0 = opt_1_dopts
560 | otherwise = opt_0_dopts
561
562 opt_0_dopts = [
563 Opt_IgnoreInterfacePragmas,
564 Opt_OmitInterfacePragmas
565 ]
566
567 opt_1_dopts = [
568 Opt_IgnoreAsserts,
569 Opt_DoEtaReduction,
570 Opt_CaseMerge
571 ]
572
573 -- -----------------------------------------------------------------------------
574 -- Standard sets of warning options
575
576 standardWarnings
577 = [ Opt_WarnDeprecations,
578 Opt_WarnOverlappingPatterns,
579 Opt_WarnMissingFields,
580 Opt_WarnMissingMethods,
581 Opt_WarnDuplicateExports
582 ]
583
584 minusWOpts
585 = standardWarnings ++
586 [ Opt_WarnUnusedBinds,
587 Opt_WarnUnusedMatches,
588 Opt_WarnUnusedImports,
589 Opt_WarnIncompletePatterns,
590 Opt_WarnDodgyImports
591 ]
592
593 minusWallOpts
594 = minusWOpts ++
595 [ Opt_WarnTypeDefaults,
596 Opt_WarnNameShadowing,
597 Opt_WarnMissingSigs,
598 Opt_WarnHiShadows,
599 Opt_WarnOrphans
600 ]
601
602 -- -----------------------------------------------------------------------------
603 -- CoreToDo: abstraction of core-to-core passes to run.
604
605 data CoreToDo -- These are diff core-to-core passes,
606 -- which may be invoked in any order,
607 -- as many times as you like.
608
609 = CoreDoSimplify -- The core-to-core simplifier.
610 SimplifierMode
611 [SimplifierSwitch]
612 -- Each run of the simplifier can take a different
613 -- set of simplifier-specific flags.
614 | CoreDoFloatInwards
615 | CoreDoFloatOutwards FloatOutSwitches
616 | CoreLiberateCase
617 | CoreDoPrintCore
618 | CoreDoStaticArgs
619 | CoreDoStrictness
620 | CoreDoWorkerWrapper
621 | CoreDoSpecialising
622 | CoreDoSpecConstr
623 | CoreDoOldStrictness
624 | CoreDoGlomBinds
625 | CoreCSE
626 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
627 -- matching this string
628
629 | CoreDoNothing -- useful when building up lists of these things
630
631 data SimplifierMode -- See comments in SimplMonad
632 = SimplGently
633 | SimplPhase Int
634
635 data SimplifierSwitch
636 = MaxSimplifierIterations Int
637 | NoCaseOfCase
638
639 data FloatOutSwitches
640 = FloatOutSw Bool -- True <=> float lambdas to top level
641 Bool -- True <=> float constants to top level,
642 -- even if they do not escape a lambda
643
644
645 -- The core-to-core pass ordering is derived from the DynFlags:
646
647 getCoreToDo :: DynFlags -> [CoreToDo]
648 getCoreToDo dflags
649 | Just todo <- coreToDo dflags = todo -- set explicitly by user
650 | otherwise = core_todo
651 where
652 opt_level = optLevel dflags
653 max_iter = maxSimplIterations dflags
654 strictness = dopt Opt_Strictness dflags
655 full_laziness = dopt Opt_FullLaziness dflags
656 cse = dopt Opt_CSE dflags
657 rule_check = ruleCheck dflags
658
659 core_todo =
660 if opt_level == 0 then
661 [
662 CoreDoSimplify (SimplPhase 0) [
663 MaxSimplifierIterations max_iter
664 ]
665 ]
666 else {- opt_level >= 1 -} [
667
668 -- initial simplify: mk specialiser happy: minimum effort please
669 CoreDoSimplify SimplGently [
670 -- Simplify "gently"
671 -- Don't inline anything till full laziness has bitten
672 -- In particular, inlining wrappers inhibits floating
673 -- e.g. ...(case f x of ...)...
674 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
675 -- ==> ...(case x of I# x# -> case fw x# of ...)...
676 -- and now the redex (f x) isn't floatable any more
677 -- Similarly, don't apply any rules until after full
678 -- laziness. Notably, list fusion can prevent floating.
679
680 NoCaseOfCase, -- Don't do case-of-case transformations.
681 -- This makes full laziness work better
682 MaxSimplifierIterations max_iter
683 ],
684
685 -- Specialisation is best done before full laziness
686 -- so that overloaded functions have all their dictionary lambdas manifest
687 CoreDoSpecialising,
688
689 if full_laziness then CoreDoFloatOutwards (FloatOutSw False False)
690 else CoreDoNothing,
691
692 CoreDoFloatInwards,
693
694 CoreDoSimplify (SimplPhase 2) [
695 -- Want to run with inline phase 2 after the specialiser to give
696 -- maximum chance for fusion to work before we inline build/augment
697 -- in phase 1. This made a difference in 'ansi' where an
698 -- overloaded function wasn't inlined till too late.
699 MaxSimplifierIterations max_iter
700 ],
701 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
702
703 CoreDoSimplify (SimplPhase 1) [
704 -- Need inline-phase2 here so that build/augment get
705 -- inlined. I found that spectral/hartel/genfft lost some useful
706 -- strictness in the function sumcode' if augment is not inlined
707 -- before strictness analysis runs
708 MaxSimplifierIterations max_iter
709 ],
710 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
711
712 CoreDoSimplify (SimplPhase 0) [
713 -- Phase 0: allow all Ids to be inlined now
714 -- This gets foldr inlined before strictness analysis
715
716 MaxSimplifierIterations 3
717 -- At least 3 iterations because otherwise we land up with
718 -- huge dead expressions because of an infelicity in the
719 -- simpifier.
720 -- let k = BIG in foldr k z xs
721 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
722 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
723 -- Don't stop now!
724
725 ],
726 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
727
728 #ifdef OLD_STRICTNESS
729 CoreDoOldStrictness
730 #endif
731 if strictness then CoreDoStrictness else CoreDoNothing,
732 CoreDoWorkerWrapper,
733 CoreDoGlomBinds,
734
735 CoreDoSimplify (SimplPhase 0) [
736 MaxSimplifierIterations max_iter
737 ],
738
739 if full_laziness then
740 CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
741 True) -- Float constants
742 else CoreDoNothing,
743 -- nofib/spectral/hartel/wang doubles in speed if you
744 -- do full laziness late in the day. It only happens
745 -- after fusion and other stuff, so the early pass doesn't
746 -- catch it. For the record, the redex is
747 -- f_el22 (f_el21 r_midblock)
748
749
750 -- We want CSE to follow the final full-laziness pass, because it may
751 -- succeed in commoning up things floated out by full laziness.
752 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
753
754 if cse then CoreCSE else CoreDoNothing,
755
756 CoreDoFloatInwards,
757
758 -- Case-liberation for -O2. This should be after
759 -- strictness analysis and the simplification which follows it.
760
761 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing }
762 ]
763
764 ++
765
766 (if opt_level >= 2 then
767 [ CoreLiberateCase,
768 CoreDoSimplify (SimplPhase 0) [
769 MaxSimplifierIterations max_iter
770 ], -- Run the simplifier after LiberateCase to vastly
771 -- reduce the possiblility of shadowing
772 -- Reason: see Note [Shadowing] in SpecConstr.lhs
773 CoreDoSpecConstr
774 ]
775 else
776 [])
777
778 ++
779
780 -- Final clean-up simplification:
781 [ CoreDoSimplify (SimplPhase 0) [
782 MaxSimplifierIterations max_iter
783 ]
784 ]
785
786 -- -----------------------------------------------------------------------------
787 -- StgToDo: abstraction of stg-to-stg passes to run.
788
789 data StgToDo
790 = StgDoMassageForProfiling -- should be (next to) last
791 -- There's also setStgVarInfo, but its absolute "lastness"
792 -- is so critical that it is hardwired in (no flag).
793 | D_stg_stats
794
795 getStgToDo :: DynFlags -> [StgToDo]
796 getStgToDo dflags
797 | Just todo <- stgToDo dflags = todo -- set explicitly by user
798 | otherwise = todo2
799 where
800 stg_stats = dopt Opt_StgStats dflags
801
802 todo1 = if stg_stats then [D_stg_stats] else []
803
804 todo2 | WayProf `elem` wayNames dflags
805 = StgDoMassageForProfiling : todo1
806 | otherwise
807 = todo1
808
809 -- -----------------------------------------------------------------------------
810 -- DynFlags parser
811
812 allFlags :: [String]
813 allFlags = map ('-':) $
814 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
815 map ("fno-"++) flags ++
816 map ("f"++) flags
817 where ok (PrefixPred _ _) = False
818 ok _ = True
819 flags = map fst fFlags
820
821 dynamic_flags :: [(String, OptKind DynP)]
822 dynamic_flags = [
823 ( "n" , NoArg (setDynFlag Opt_DryRun) )
824 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
825 , ( "F" , NoArg (setDynFlag Opt_Pp))
826 , ( "#include" , HasArg (addCmdlineHCInclude) )
827 , ( "v" , OptIntSuffix setVerbosity )
828 ------- Specific phases --------------------------------------------
829 , ( "pgmL" , HasArg (upd . setPgmL) )
830 , ( "pgmP" , HasArg (upd . setPgmP) )
831 , ( "pgmF" , HasArg (upd . setPgmF) )
832 , ( "pgmc" , HasArg (upd . setPgmc) )
833 , ( "pgmm" , HasArg (upd . setPgmm) )
834 , ( "pgms" , HasArg (upd . setPgms) )
835 , ( "pgma" , HasArg (upd . setPgma) )
836 , ( "pgml" , HasArg (upd . setPgml) )
837 , ( "pgmdll" , HasArg (upd . setPgmdll) )
838
839 , ( "optL" , HasArg (upd . addOptL) )
840 , ( "optP" , HasArg (upd . addOptP) )
841 , ( "optF" , HasArg (upd . addOptF) )
842 , ( "optc" , HasArg (upd . addOptc) )
843 , ( "optm" , HasArg (upd . addOptm) )
844 , ( "opta" , HasArg (upd . addOpta) )
845 , ( "optl" , HasArg (upd . addOptl) )
846 , ( "optdll" , HasArg (upd . addOptdll) )
847 , ( "optdep" , HasArg (upd . addOptdep) )
848
849 , ( "split-objs" , NoArg (if can_split
850 then setDynFlag Opt_SplitObjs
851 else return ()) )
852
853 -------- Linking ----------------------------------------------------
854 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
855 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
856 , ( "-mk-dll" , NoArg (upd $ \d -> d{ ghcLink=MkDLL } ))
857
858 ------- Libraries ---------------------------------------------------
859 , ( "L" , Prefix addLibraryPath )
860 , ( "l" , AnySuffix (\s -> do upd (addOptl s)
861 upd (addOptdll s)))
862
863 ------- Frameworks --------------------------------------------------
864 -- -framework-path should really be -F ...
865 , ( "framework-path" , HasArg addFrameworkPath )
866 , ( "framework" , HasArg (upd . addCmdlineFramework) )
867
868 ------- Output Redirection ------------------------------------------
869 , ( "odir" , HasArg (upd . setObjectDir . Just))
870 , ( "o" , SepArg (upd . setOutputFile . Just))
871 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
872 , ( "osuf" , HasArg (upd . setObjectSuf))
873 , ( "hcsuf" , HasArg (upd . setHcSuf))
874 , ( "hisuf" , HasArg (upd . setHiSuf))
875 , ( "hidir" , HasArg (upd . setHiDir . Just))
876 , ( "tmpdir" , HasArg (upd . setTmpDir))
877 , ( "stubdir" , HasArg (upd . setStubDir . Just))
878
879 ------- Keeping temporary files -------------------------------------
880 , ( "keep-hc-file" , AnySuffix (\_ -> setDynFlag Opt_KeepHcFiles))
881 , ( "keep-s-file" , AnySuffix (\_ -> setDynFlag Opt_KeepSFiles))
882 , ( "keep-raw-s-file", AnySuffix (\_ -> setDynFlag Opt_KeepRawSFiles))
883 , ( "keep-tmp-files" , AnySuffix (\_ -> setDynFlag Opt_KeepTmpFiles))
884
885 ------- Miscellaneous ----------------------------------------------
886 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
887 , ( "main-is" , SepArg setMainIs )
888 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
889 , ( "hpcdir" , SepArg setOptHpcDir )
890
891 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
892 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
893 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
894
895 ------- Packages ----------------------------------------------------
896 , ( "package-conf" , HasArg extraPkgConf_ )
897 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
898 , ( "package-name" , HasArg (upd . setPackageName) )
899 , ( "package" , HasArg exposePackage )
900 , ( "hide-package" , HasArg hidePackage )
901 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
902 , ( "ignore-package" , HasArg ignorePackage )
903 , ( "syslib" , HasArg exposePackage ) -- for compatibility
904
905 ------ HsCpp opts ---------------------------------------------------
906 , ( "D", AnySuffix (upd . addOptP) )
907 , ( "U", AnySuffix (upd . addOptP) )
908
909 ------- Include/Import Paths ----------------------------------------
910 , ( "I" , Prefix addIncludePath)
911 , ( "i" , OptPrefix addImportPath )
912
913 ------ Debugging ----------------------------------------------------
914 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
915
916 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
917 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
918 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
919 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
920 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
921 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
922 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
923 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
924 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
925 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
926 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
927 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
928 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
929 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
930 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
931 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
932 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
933 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
934 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
935 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
936 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
937 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
938 , ( "ddump-rn-trace", NoArg (setDynFlag Opt_D_dump_rn_trace))
939 , ( "ddump-if-trace", NoArg (setDynFlag Opt_D_dump_if_trace))
940 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
941 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
942 , ( "ddump-rn-stats", NoArg (setDynFlag Opt_D_dump_rn_stats))
943 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
944 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
945 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
946 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
947 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
948 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
949 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
950 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
951 , ( "ddump-minimal-imports", NoArg (setDynFlag Opt_D_dump_minimal_imports))
952 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
953 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
954
955 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
956 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
957 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
958 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
959 setVerbosity (Just 2)) )
960 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
961
962 ------ Machine dependant (-m<blah>) stuff ---------------------------
963
964 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
965 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
966 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
967
968 ------ Warning opts -------------------------------------------------
969 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
970 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
971 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
972 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
973 , ( "w" , NoArg (mapM_ unSetDynFlag minusWallOpts) )
974
975 ------ Optimisation flags ------------------------------------------
976 , ( "O" , NoArg (upd (setOptLevel 1)))
977 , ( "Onot" , NoArg (upd (setOptLevel 0)))
978 , ( "O" , PrefixPred (all isDigit)
979 (\f -> upd (setOptLevel (read f))))
980
981 , ( "fmax-simplifier-iterations",
982 PrefixPred (all isDigit)
983 (\n -> upd (\dfs ->
984 dfs{ maxSimplIterations = read n })) )
985
986 , ( "frule-check",
987 SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
988
989 ------ Compiler flags -----------------------------------------------
990
991 , ( "fno-code", NoArg (setTarget HscNothing))
992 , ( "fasm", AnySuffix (\_ -> setTarget HscAsm) )
993 , ( "fvia-c", NoArg (setTarget HscC) )
994 , ( "fvia-C", NoArg (setTarget HscC) )
995
996 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
997 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
998
999 , ( "fcontext-stack" , OptIntSuffix $ \mb_n -> upd $ \dfs ->
1000 dfs{ ctxtStkDepth = mb_n `orElse` 3 })
1001
1002 -- the rest of the -f* and -fno-* flags
1003 , ( "fno-", PrefixPred (\f -> isFFlag f) (\f -> unSetDynFlag (getFFlag f)) )
1004 , ( "f", PrefixPred (\f -> isFFlag f) (\f -> setDynFlag (getFFlag f)) )
1005 ]
1006
1007 -- these -f<blah> flags can all be reversed with -fno-<blah>
1008
1009 fFlags = [
1010 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1011 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1012 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1013 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1014 ( "warn-missing-fields", Opt_WarnMissingFields ),
1015 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1016 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1017 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1018 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1019 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1020 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1021 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1022 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1023 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1024 ( "warn-deprecations", Opt_WarnDeprecations ),
1025 ( "warn-orphans", Opt_WarnOrphans ),
1026 ( "fi", Opt_FFI ), -- support `-ffi'...
1027 ( "ffi", Opt_FFI ), -- ...and also `-fffi'
1028 ( "arrows", Opt_Arrows ), -- arrow syntax
1029 ( "parr", Opt_PArr ),
1030 ( "th", Opt_TH ),
1031 ( "implicit-prelude", Opt_ImplicitPrelude ),
1032 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1033 ( "bang-patterns", Opt_BangPatterns ),
1034 ( "indexed-types", Opt_IndexedTypes ),
1035 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1036 ( "mono-pat-binds", Opt_MonoPatBinds ),
1037 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1038 ( "implicit-params", Opt_ImplicitParams ),
1039 ( "allow-overlapping-instances", Opt_AllowOverlappingInstances ),
1040 ( "allow-undecidable-instances", Opt_AllowUndecidableInstances ),
1041 ( "allow-incoherent-instances", Opt_AllowIncoherentInstances ),
1042 ( "generics", Opt_Generics ),
1043 ( "strictness", Opt_Strictness ),
1044 ( "full-laziness", Opt_FullLaziness ),
1045 ( "cse", Opt_CSE ),
1046 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1047 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1048 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1049 ( "ignore-asserts", Opt_IgnoreAsserts ),
1050 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1051 ( "do-eta-reduction", Opt_DoEtaReduction ),
1052 ( "case-merge", Opt_CaseMerge ),
1053 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1054 ( "dicts-cheap", Opt_DictsCheap ),
1055 ( "excess-precision", Opt_ExcessPrecision ),
1056 ( "asm-mangling", Opt_DoAsmMangling ),
1057 ( "print-bind-result", Opt_PrintBindResult ),
1058 ( "force-recomp", Opt_ForceRecomp ),
1059 ( "hpc", Opt_Hpc ),
1060 ( "hpc-tracer", Opt_Hpc_Tracer )
1061 ]
1062
1063
1064 glasgowExtsFlags = [
1065 Opt_GlasgowExts,
1066 Opt_FFI,
1067 Opt_ImplicitParams,
1068 Opt_ScopedTypeVariables,
1069 Opt_IndexedTypes ]
1070
1071 isFFlag f = f `elem` (map fst fFlags)
1072 getFFlag f = fromJust (lookup f fFlags)
1073
1074 -- -----------------------------------------------------------------------------
1075 -- Parsing the dynamic flags.
1076
1077 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1078 parseDynamicFlags dflags args = do
1079 let ((leftover,errs),dflags')
1080 = runCmdLine (processArgs dynamic_flags args) dflags
1081 when (not (null errs)) $ do
1082 throwDyn (UsageError (unlines errs))
1083 return (dflags', leftover)
1084
1085
1086 type DynP = CmdLineP DynFlags
1087
1088 upd :: (DynFlags -> DynFlags) -> DynP ()
1089 upd f = do
1090 dfs <- getCmdLineState
1091 putCmdLineState $! (f dfs)
1092
1093 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1094 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1095 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1096
1097 setDumpFlag :: DynFlag -> OptKind DynP
1098 setDumpFlag dump_flag
1099 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1100 -- Whenver we -ddump, switch off the recompilation checker,
1101 -- else you don't see the dump!
1102
1103 setVerbosity :: Maybe Int -> DynP ()
1104 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1105
1106 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1107
1108 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1109
1110 exposePackage p =
1111 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1112 hidePackage p =
1113 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1114 ignorePackage p =
1115 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1116
1117 setPackageName p
1118 | Nothing <- unpackPackageId pid
1119 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1120 | otherwise
1121 = \s -> s{ thisPackage = pid }
1122 where
1123 pid = stringToPackageId p
1124
1125 -- we can only switch between HscC, and HscAsmm with dynamic flags
1126 -- (-fvia-C, -fasm, -filx respectively).
1127 setTarget l = upd (\dfs -> case hscTarget dfs of
1128 HscC -> dfs{ hscTarget = l }
1129 HscAsm -> dfs{ hscTarget = l }
1130 _ -> dfs)
1131
1132 setOptLevel :: Int -> DynFlags -> DynFlags
1133 setOptLevel n dflags
1134 | hscTarget dflags == HscInterpreted && n > 0
1135 = dflags
1136 -- not in IO any more, oh well:
1137 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1138 | otherwise
1139 = updOptLevel n dflags
1140
1141
1142 setMainIs :: String -> DynP ()
1143 setMainIs arg
1144 | not (null main_fn) -- The arg looked like "Foo.baz"
1145 = upd $ \d -> d{ mainFunIs = Just main_fn,
1146 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1147
1148 | isUpper (head main_mod) -- The arg looked like "Foo"
1149 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1150
1151 | otherwise -- The arg looked like "baz"
1152 = upd $ \d -> d{ mainFunIs = Just main_mod }
1153 where
1154 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1155
1156 -----------------------------------------------------------------------------
1157 -- Paths & Libraries
1158
1159 -- -i on its own deletes the import paths
1160 addImportPath "" = upd (\s -> s{importPaths = []})
1161 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1162
1163
1164 addLibraryPath p =
1165 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1166
1167 addIncludePath p =
1168 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1169
1170 addFrameworkPath p =
1171 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1172
1173 split_marker = ':' -- not configurable (ToDo)
1174
1175 splitPathList :: String -> [String]
1176 splitPathList s = filter notNull (splitUp s)
1177 -- empty paths are ignored: there might be a trailing
1178 -- ':' in the initial list, for example. Empty paths can
1179 -- cause confusion when they are translated into -I options
1180 -- for passing to gcc.
1181 where
1182 #ifndef mingw32_TARGET_OS
1183 splitUp xs = split split_marker xs
1184 #else
1185 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1186 --
1187 -- That is, if "foo:bar:baz" is used, this interpreted as
1188 -- consisting of three entries, 'foo', 'bar', 'baz'.
1189 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1190 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1191 --
1192 -- Notice that no attempt is made to fully replace the 'standard'
1193 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1194 -- that this will cause too much breakage for users & ':' will
1195 -- work fine even with DOS paths, if you're not insisting on being silly.
1196 -- So, use either.
1197 splitUp [] = []
1198 splitUp (x:':':div:xs) | div `elem` dir_markers
1199 = ((x:':':div:p): splitUp rs)
1200 where
1201 (p,rs) = findNextPath xs
1202 -- we used to check for existence of the path here, but that
1203 -- required the IO monad to be threaded through the command-line
1204 -- parser which is quite inconvenient. The
1205 splitUp xs = cons p (splitUp rs)
1206 where
1207 (p,rs) = findNextPath xs
1208
1209 cons "" xs = xs
1210 cons x xs = x:xs
1211
1212 -- will be called either when we've consumed nought or the
1213 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1214 -- finding the next split marker.
1215 findNextPath xs =
1216 case break (`elem` split_markers) xs of
1217 (p, d:ds) -> (p, ds)
1218 (p, xs) -> (p, xs)
1219
1220 split_markers :: [Char]
1221 split_markers = [':', ';']
1222
1223 dir_markers :: [Char]
1224 dir_markers = ['/', '\\']
1225 #endif
1226
1227 -- -----------------------------------------------------------------------------
1228 -- tmpDir, where we store temporary files.
1229
1230 setTmpDir :: FilePath -> DynFlags -> DynFlags
1231 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1232 where
1233 #if !defined(mingw32_HOST_OS)
1234 canonicalise p = normalisePath p
1235 #else
1236 -- Canonicalisation of temp path under win32 is a bit more
1237 -- involved: (a) strip trailing slash,
1238 -- (b) normalise slashes
1239 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1240 --
1241 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1242
1243 -- if we're operating under cygwin, and TMP/TEMP is of
1244 -- the form "/cygdrive/drive/path", translate this to
1245 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1246 -- understand /cygdrive paths.)
1247 xltCygdrive path
1248 | "/cygdrive/" `isPrefixOf` path =
1249 case drop (length "/cygdrive/") path of
1250 drive:xs@('/':_) -> drive:':':xs
1251 _ -> path
1252 | otherwise = path
1253
1254 -- strip the trailing backslash (awful, but we only do this once).
1255 removeTrailingSlash path =
1256 case last path of
1257 '/' -> init path
1258 '\\' -> init path
1259 _ -> path
1260 #endif
1261
1262 -----------------------------------------------------------------------------
1263 -- Hpc stuff
1264
1265 setOptHpcDir :: String -> DynP ()
1266 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1267
1268 -----------------------------------------------------------------------------
1269 -- Via-C compilation stuff
1270
1271 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1272 [String]) -- for registerised HC compilations
1273 machdepCCOpts dflags
1274 #if alpha_TARGET_ARCH
1275 = ( ["-w", "-mieee"
1276 #ifdef HAVE_THREADED_RTS_SUPPORT
1277 , "-D_REENTRANT"
1278 #endif
1279 ], [] )
1280 -- For now, to suppress the gcc warning "call-clobbered
1281 -- register used for global register variable", we simply
1282 -- disable all warnings altogether using the -w flag. Oh well.
1283
1284 #elif hppa_TARGET_ARCH
1285 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1286 -- (very nice, but too bad the HP /usr/include files don't agree.)
1287 = ( ["-D_HPUX_SOURCE"], [] )
1288
1289 #elif m68k_TARGET_ARCH
1290 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1291 -- popping of args to routines to be explicit; if we let things
1292 -- be deferred 'til after an STGJUMP, imminent death is certain!
1293 --
1294 -- -fomit-frame-pointer : *don't*
1295 -- It's better to have a6 completely tied up being a frame pointer
1296 -- rather than let GCC pick random things to do with it.
1297 -- (If we want to steal a6, then we would try to do things
1298 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1299 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1300
1301 #elif i386_TARGET_ARCH
1302 -- -fno-defer-pop : basically the same game as for m68k
1303 --
1304 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1305 -- the fp (%ebp) for our register maps.
1306 = let n_regs = stolen_x86_regs dflags
1307 sta = opt_Static
1308 in
1309 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1310 -- , if suffixMatch "mingw32" cTARGETPLATFORM then "-mno-cygwin" else ""
1311 ],
1312 [ "-fno-defer-pop",
1313 #ifdef HAVE_GCC_MNO_OMIT_LFPTR
1314 -- Some gccs are configured with
1315 -- -momit-leaf-frame-pointer on by default, and it
1316 -- apparently takes precedence over
1317 -- -fomit-frame-pointer, so we disable it first here.
1318 "-mno-omit-leaf-frame-pointer",
1319 #endif
1320 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1321 "-fno-unit-at-a-time",
1322 -- unit-at-a-time doesn't do us any good, and screws
1323 -- up -split-objs by moving the split markers around.
1324 -- It's only turned on with -O2, but put it here just
1325 -- in case someone uses -optc-O2.
1326 #endif
1327 "-fomit-frame-pointer",
1328 -- we want -fno-builtin, because when gcc inlines
1329 -- built-in functions like memcpy() it tends to
1330 -- run out of registers, requiring -monly-n-regs
1331 "-fno-builtin",
1332 "-DSTOLEN_X86_REGS="++show n_regs ]
1333 )
1334
1335 #elif ia64_TARGET_ARCH
1336 = ( [], ["-fomit-frame-pointer", "-G0"] )
1337
1338 #elif x86_64_TARGET_ARCH
1339 = ( [], ["-fomit-frame-pointer",
1340 "-fno-asynchronous-unwind-tables",
1341 -- the unwind tables are unnecessary for HC code,
1342 -- and get in the way of -split-objs. Another option
1343 -- would be to throw them away in the mangler, but this
1344 -- is easier.
1345 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1346 "-fno-unit-at-a-time",
1347 -- unit-at-a-time doesn't do us any good, and screws
1348 -- up -split-objs by moving the split markers around.
1349 -- It's only turned on with -O2, but put it here just
1350 -- in case someone uses -optc-O2.
1351 #endif
1352 "-fno-builtin"
1353 -- calling builtins like strlen() using the FFI can
1354 -- cause gcc to run out of regs, so use the external
1355 -- version.
1356 ] )
1357
1358 #elif sparc_TARGET_ARCH
1359 = ( [], ["-w"] )
1360 -- For now, to suppress the gcc warning "call-clobbered
1361 -- register used for global register variable", we simply
1362 -- disable all warnings altogether using the -w flag. Oh well.
1363
1364 #elif powerpc_apple_darwin_TARGET
1365 -- -no-cpp-precomp:
1366 -- Disable Apple's precompiling preprocessor. It's a great thing
1367 -- for "normal" programs, but it doesn't support register variable
1368 -- declarations.
1369 = ( [], ["-no-cpp-precomp"] )
1370 #else
1371 = ( [], [] )
1372 #endif
1373
1374 picCCOpts :: DynFlags -> [String]
1375 picCCOpts dflags
1376 #if darwin_TARGET_OS
1377 -- Apple prefers to do things the other way round.
1378 -- PIC is on by default.
1379 -- -mdynamic-no-pic:
1380 -- Turn off PIC code generation.
1381 -- -fno-common:
1382 -- Don't generate "common" symbols - these are unwanted
1383 -- in dynamic libraries.
1384
1385 | opt_PIC
1386 = ["-fno-common"]
1387 | otherwise
1388 = ["-mdynamic-no-pic"]
1389 #elif mingw32_TARGET_OS
1390 -- no -fPIC for Windows
1391 = []
1392 #else
1393 | opt_PIC
1394 = ["-fPIC"]
1395 | otherwise
1396 = []
1397 #endif
1398
1399 -- -----------------------------------------------------------------------------
1400 -- Splitting
1401
1402 can_split :: Bool
1403 can_split =
1404 #if defined(i386_TARGET_ARCH) \
1405 || defined(x86_64_TARGET_ARCH) \
1406 || defined(alpha_TARGET_ARCH) \
1407 || defined(hppa_TARGET_ARCH) \
1408 || defined(m68k_TARGET_ARCH) \
1409 || defined(mips_TARGET_ARCH) \
1410 || defined(powerpc_TARGET_ARCH) \
1411 || defined(rs6000_TARGET_ARCH) \
1412 || defined(sparc_TARGET_ARCH)
1413 True
1414 #else
1415 False
1416 #endif
1417