51abf3637081a997f1512830ec05cd593844f99a
[ghc.git] / compiler / main / DynFlags.hs
1
2 {-# OPTIONS -fno-warn-missing-fields #-}
3 -----------------------------------------------------------------------------
4 --
5 -- Dynamic flags
6 --
7 -- Most flags are dynamic flags, which means they can change from
8 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
9 -- multi-session GHC each session can be using different dynamic
10 -- flags. Dynamic flags can also be set at the prompt in GHCi.
11 --
12 -- (c) The University of Glasgow 2005
13 --
14 -----------------------------------------------------------------------------
15
16 module DynFlags (
17 -- Dynamic flags
18 DynFlag(..),
19 DynFlags(..),
20 HscTarget(..), isObjectTarget, defaultObjectTarget,
21 GhcMode(..), isOneShot,
22 GhcLink(..), isNoLink,
23 PackageFlag(..),
24 Option(..),
25
26 -- Configuration of the core-to-core and stg-to-stg phases
27 CoreToDo(..),
28 StgToDo(..),
29 SimplifierSwitch(..),
30 SimplifierMode(..), FloatOutSwitches(..),
31 getCoreToDo, getStgToDo,
32
33 -- Manipulating DynFlags
34 defaultDynFlags, -- DynFlags
35 initDynFlags, -- DynFlags -> IO DynFlags
36
37 dopt, -- DynFlag -> DynFlags -> Bool
38 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
39 getOpts, -- (DynFlags -> [a]) -> IO [a]
40 getVerbFlag,
41 updOptLevel,
42 setTmpDir,
43 setPackageName,
44
45 -- parsing DynFlags
46 parseDynamicFlags,
47 allFlags,
48
49 -- misc stuff
50 machdepCCOpts, picCCOpts
51 ) where
52
53 #include "HsVersions.h"
54
55 import Module ( Module, mkModuleName, mkModule )
56 import PackageConfig
57 import PrelNames ( mAIN )
58 #ifdef i386_TARGET_ARCH
59 import StaticFlags ( opt_Static )
60 #endif
61 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
62 v_RTS_Build_tag )
63 import {-# SOURCE #-} Packages (PackageState)
64 import DriverPhases ( Phase(..), phaseInputExt )
65 import Config
66 import CmdLineParser
67 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
68 import Panic ( panic, GhcException(..) )
69 import UniqFM ( UniqFM )
70 import Util ( notNull, splitLongestPrefix, normalisePath )
71 import Maybes ( fromJust, orElse )
72 import SrcLoc ( SrcSpan )
73 import Outputable
74 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
75
76 import Data.IORef ( readIORef )
77 import Control.Exception ( throwDyn )
78 import Control.Monad ( when )
79 #ifdef mingw32_TARGET_OS
80 import Data.List ( isPrefixOf )
81 #else
82 import Util ( split )
83 #endif
84
85 import Data.Char ( isUpper )
86 import System.IO ( hPutStrLn, stderr )
87
88 -- -----------------------------------------------------------------------------
89 -- DynFlags
90
91 data DynFlag
92
93 -- debugging flags
94 = Opt_D_dump_cmm
95 | Opt_D_dump_asm
96 | Opt_D_dump_cpranal
97 | Opt_D_dump_deriv
98 | Opt_D_dump_ds
99 | Opt_D_dump_flatC
100 | Opt_D_dump_foreign
101 | Opt_D_dump_inlinings
102 | Opt_D_dump_rule_firings
103 | Opt_D_dump_occur_anal
104 | Opt_D_dump_parsed
105 | Opt_D_dump_rn
106 | Opt_D_dump_simpl
107 | Opt_D_dump_simpl_iterations
108 | Opt_D_dump_spec
109 | Opt_D_dump_prep
110 | Opt_D_dump_stg
111 | Opt_D_dump_stranal
112 | Opt_D_dump_tc
113 | Opt_D_dump_types
114 | Opt_D_dump_rules
115 | Opt_D_dump_cse
116 | Opt_D_dump_worker_wrapper
117 | Opt_D_dump_rn_trace
118 | Opt_D_dump_rn_stats
119 | Opt_D_dump_opt_cmm
120 | Opt_D_dump_simpl_stats
121 | Opt_D_dump_tc_trace
122 | Opt_D_dump_if_trace
123 | Opt_D_dump_splices
124 | Opt_D_dump_BCOs
125 | Opt_D_dump_vect
126 | Opt_D_dump_hpc
127 | Opt_D_source_stats
128 | Opt_D_verbose_core2core
129 | Opt_D_verbose_stg2stg
130 | Opt_D_dump_hi
131 | Opt_D_dump_hi_diffs
132 | Opt_D_dump_minimal_imports
133 | Opt_D_dump_mod_cycles
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_WarnImplicitPrelude
143 | Opt_WarnIncompletePatterns
144 | Opt_WarnIncompletePatternsRecUpd
145 | Opt_WarnMissingFields
146 | Opt_WarnMissingMethods
147 | Opt_WarnMissingSigs
148 | Opt_WarnNameShadowing
149 | Opt_WarnOverlappingPatterns
150 | Opt_WarnSimplePatterns
151 | Opt_WarnTypeDefaults
152 | Opt_WarnMonomorphism
153 | Opt_WarnUnusedBinds
154 | Opt_WarnUnusedImports
155 | Opt_WarnUnusedMatches
156 | Opt_WarnDeprecations
157 | Opt_WarnDodgyImports
158 | Opt_WarnOrphans
159 | Opt_WarnTabs
160
161 -- language opts
162 | Opt_AllowOverlappingInstances
163 | Opt_AllowUndecidableInstances
164 | Opt_AllowIncoherentInstances
165 | Opt_MonomorphismRestriction
166 | Opt_MonoPatBinds
167 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
168 | Opt_GlasgowExts
169 | Opt_FFI
170 | Opt_PArr -- Syntactic support for parallel arrays
171 | Opt_Arrows -- Arrow-notation syntax
172 | Opt_TH
173 | Opt_ImplicitParams
174 | Opt_Generics
175 | Opt_ImplicitPrelude
176 | Opt_ScopedTypeVariables
177 | Opt_BangPatterns
178 | Opt_IndexedTypes
179 | Opt_OverloadedStrings
180
181 -- optimisation opts
182 | Opt_Strictness
183 | Opt_FullLaziness
184 | Opt_CSE
185 | Opt_LiberateCase
186 | Opt_SpecConstr
187 | Opt_IgnoreInterfacePragmas
188 | Opt_OmitInterfacePragmas
189 | Opt_DoLambdaEtaExpansion
190 | Opt_IgnoreAsserts
191 | Opt_IgnoreBreakpoints
192 | Opt_DoEtaReduction
193 | Opt_CaseMerge
194 | Opt_UnboxStrictFields
195 | Opt_DictsCheap
196 | Opt_RewriteRules
197
198 -- misc opts
199 | Opt_Cpp
200 | Opt_Pp
201 | Opt_ForceRecomp
202 | Opt_DryRun
203 | Opt_DoAsmMangling
204 | Opt_ExcessPrecision
205 | Opt_ReadUserPackageConf
206 | Opt_NoHsMain
207 | Opt_SplitObjs
208 | Opt_StgStats
209 | Opt_HideAllPackages
210 | Opt_PrintBindResult
211 | Opt_Haddock
212 | Opt_Hpc_No_Auto
213
214 -- keeping stuff
215 | Opt_KeepHiDiffs
216 | Opt_KeepHcFiles
217 | Opt_KeepSFiles
218 | Opt_KeepRawSFiles
219 | Opt_KeepTmpFiles
220
221 deriving (Eq)
222
223 data DynFlags = DynFlags {
224 ghcMode :: GhcMode,
225 ghcLink :: GhcLink,
226 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
227 stgToDo :: Maybe [StgToDo], -- similarly
228 hscTarget :: HscTarget,
229 hscOutName :: String, -- name of the output file
230 extCoreName :: String, -- name of the .core output file
231 verbosity :: Int, -- verbosity level
232 optLevel :: Int, -- optimisation level
233 maxSimplIterations :: Int, -- max simplifier iterations
234 ruleCheck :: Maybe String,
235
236 specThreshold :: Int, -- Threshold for function specialisation
237
238 stolen_x86_regs :: Int,
239 cmdlineHcIncludes :: [String], -- -#includes
240 importPaths :: [FilePath],
241 mainModIs :: Module,
242 mainFunIs :: Maybe String,
243 ctxtStkDepth :: Int, -- Typechecker context stack depth
244
245 thisPackage :: PackageId,
246
247 -- ways
248 wayNames :: [WayName], -- way flags from the cmd line
249 buildTag :: String, -- the global "way" (eg. "p" for prof)
250 rtsBuildTag :: String, -- the RTS "way"
251
252 -- paths etc.
253 objectDir :: Maybe String,
254 hiDir :: Maybe String,
255 stubDir :: Maybe String,
256
257 objectSuf :: String,
258 hcSuf :: String,
259 hiSuf :: String,
260
261 outputFile :: Maybe String,
262 outputHi :: Maybe String,
263
264 includePaths :: [String],
265 libraryPaths :: [String],
266 frameworkPaths :: [String], -- used on darwin only
267 cmdlineFrameworks :: [String], -- ditto
268 tmpDir :: String, -- no trailing '/'
269
270 ghcUsagePath :: FilePath, -- Filled in by SysTools
271 ghciUsagePath :: FilePath, -- ditto
272
273 hpcDir :: String, -- ^ path to store the .mix files
274
275 -- options for particular phases
276 opt_L :: [String],
277 opt_P :: [String],
278 opt_F :: [String],
279 opt_c :: [String],
280 opt_m :: [String],
281 opt_a :: [String],
282 opt_l :: [String],
283 opt_dll :: [String],
284 opt_dep :: [String],
285
286 -- commands for particular phases
287 pgm_L :: String,
288 pgm_P :: (String,[Option]),
289 pgm_F :: String,
290 pgm_c :: (String,[Option]),
291 pgm_m :: (String,[Option]),
292 pgm_s :: (String,[Option]),
293 pgm_a :: (String,[Option]),
294 pgm_l :: (String,[Option]),
295 pgm_dll :: (String,[Option]),
296 pgm_T :: String,
297 pgm_sysman :: String,
298
299 -- Package flags
300 extraPkgConfs :: [FilePath],
301 topDir :: FilePath, -- filled in by SysTools
302 systemPackageConfig :: FilePath, -- ditto
303 -- The -package-conf flags given on the command line, in the order
304 -- they appeared.
305
306 packageFlags :: [PackageFlag],
307 -- The -package and -hide-package flags from the command-line
308
309 -- Package state
310 -- NB. do not modify this field, it is calculated by
311 -- Packages.initPackages and Packages.updatePackages.
312 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
313 pkgState :: PackageState,
314
315 -- hsc dynamic flags
316 flags :: [DynFlag],
317
318 -- message output
319 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
320 }
321
322 data HscTarget
323 = HscC
324 | HscAsm
325 | HscJava
326 | HscInterpreted
327 | HscNothing
328 deriving (Eq, Show)
329
330 -- | will this target result in an object file on the disk?
331 isObjectTarget :: HscTarget -> Bool
332 isObjectTarget HscC = True
333 isObjectTarget HscAsm = True
334 isObjectTarget _ = False
335
336 -- | The 'GhcMode' tells us whether we're doing multi-module
337 -- compilation (controlled via the "GHC" API) or one-shot
338 -- (single-module) compilation. This makes a difference primarily to
339 -- the "Finder": in one-shot mode we look for interface files for
340 -- imported modules, but in multi-module mode we look for source files
341 -- in order to check whether they need to be recompiled.
342 data GhcMode
343 = CompManager -- ^ --make, GHCi, etc.
344 | OneShot -- ^ ghc -c Foo.hs
345 | MkDepend -- ^ ghc -M, see Finder for why we need this
346 deriving Eq
347
348 isOneShot :: GhcMode -> Bool
349 isOneShot OneShot = True
350 isOneShot _other = False
351
352 -- | What kind of linking to do.
353 data GhcLink -- What to do in the link step, if there is one
354 = NoLink -- Don't link at all
355 | LinkBinary -- Link object code into a binary
356 | LinkInMemory -- Use the in-memory dynamic linker
357 | MkDLL -- Make a DLL
358 deriving Eq
359
360 isNoLink :: GhcLink -> Bool
361 isNoLink NoLink = True
362 isNoLink other = False
363
364 data PackageFlag
365 = ExposePackage String
366 | HidePackage String
367 | IgnorePackage String
368 deriving Eq
369
370 defaultHscTarget = defaultObjectTarget
371
372 -- | the 'HscTarget' value corresponding to the default way to create
373 -- object files on the current platform.
374 defaultObjectTarget
375 | cGhcWithNativeCodeGen == "YES" = HscAsm
376 | otherwise = HscC
377
378 initDynFlags dflags = do
379 -- someday these will be dynamic flags
380 ways <- readIORef v_Ways
381 build_tag <- readIORef v_Build_tag
382 rts_build_tag <- readIORef v_RTS_Build_tag
383 return dflags{
384 wayNames = ways,
385 buildTag = build_tag,
386 rtsBuildTag = rts_build_tag
387 }
388
389 defaultDynFlags =
390 DynFlags {
391 ghcMode = CompManager,
392 ghcLink = LinkBinary,
393 coreToDo = Nothing,
394 stgToDo = Nothing,
395 hscTarget = defaultHscTarget,
396 hscOutName = "",
397 extCoreName = "",
398 verbosity = 0,
399 optLevel = 0,
400 maxSimplIterations = 4,
401 ruleCheck = Nothing,
402 specThreshold = 200,
403 stolen_x86_regs = 4,
404 cmdlineHcIncludes = [],
405 importPaths = ["."],
406 mainModIs = mAIN,
407 mainFunIs = Nothing,
408 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
409
410 thisPackage = mainPackageId,
411
412 objectDir = Nothing,
413 hiDir = Nothing,
414 stubDir = Nothing,
415
416 objectSuf = phaseInputExt StopLn,
417 hcSuf = phaseInputExt HCc,
418 hiSuf = "hi",
419
420 outputFile = Nothing,
421 outputHi = Nothing,
422 includePaths = [],
423 libraryPaths = [],
424 frameworkPaths = [],
425 cmdlineFrameworks = [],
426 tmpDir = cDEFAULT_TMPDIR,
427
428 hpcDir = ".hpc",
429
430 opt_L = [],
431 opt_P = [],
432 opt_F = [],
433 opt_c = [],
434 opt_a = [],
435 opt_m = [],
436 opt_l = [],
437 opt_dll = [],
438 opt_dep = [],
439
440 extraPkgConfs = [],
441 packageFlags = [],
442 pkgDatabase = Nothing,
443 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
444 flags = [
445 Opt_ReadUserPackageConf,
446
447 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
448 -- behaviour the default, to see if anyone notices
449 -- SLPJ July 06
450
451 Opt_ImplicitPrelude,
452 Opt_MonomorphismRestriction,
453
454 Opt_DoAsmMangling,
455
456 -- on by default:
457 Opt_PrintBindResult ]
458 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
459 -- The default -O0 options
460 ++ standardWarnings,
461
462 log_action = \severity srcSpan style msg ->
463 case severity of
464 SevInfo -> hPutStrLn stderr (show (msg style))
465 SevFatal -> hPutStrLn stderr (show (msg style))
466 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
467 }
468
469 {-
470 Verbosity levels:
471
472 0 | print errors & warnings only
473 1 | minimal verbosity: print "compiling M ... done." for each module.
474 2 | equivalent to -dshow-passes
475 3 | equivalent to existing "ghc -v"
476 4 | "ghc -v -ddump-most"
477 5 | "ghc -v -ddump-all"
478 -}
479
480 dopt :: DynFlag -> DynFlags -> Bool
481 dopt f dflags = f `elem` (flags dflags)
482
483 dopt_set :: DynFlags -> DynFlag -> DynFlags
484 dopt_set dfs f = dfs{ flags = f : flags dfs }
485
486 dopt_unset :: DynFlags -> DynFlag -> DynFlags
487 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
488
489 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
490 getOpts dflags opts = reverse (opts dflags)
491 -- We add to the options from the front, so we need to reverse the list
492
493 getVerbFlag :: DynFlags -> String
494 getVerbFlag dflags
495 | verbosity dflags >= 3 = "-v"
496 | otherwise = ""
497
498 setObjectDir f d = d{ objectDir = f}
499 setHiDir f d = d{ hiDir = f}
500 setStubDir f d = d{ stubDir = f}
501
502 setObjectSuf f d = d{ objectSuf = f}
503 setHiSuf f d = d{ hiSuf = f}
504 setHcSuf f d = d{ hcSuf = f}
505
506 setOutputFile f d = d{ outputFile = f}
507 setOutputHi f d = d{ outputHi = f}
508
509 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
510 -- Config.hs should really use Option.
511 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
512
513 setPgmL f d = d{ pgm_L = f}
514 setPgmF f d = d{ pgm_F = f}
515 setPgmc f d = d{ pgm_c = (f,[])}
516 setPgmm f d = d{ pgm_m = (f,[])}
517 setPgms f d = d{ pgm_s = (f,[])}
518 setPgma f d = d{ pgm_a = (f,[])}
519 setPgml f d = d{ pgm_l = (f,[])}
520 setPgmdll f d = d{ pgm_dll = (f,[])}
521
522 addOptL f d = d{ opt_L = f : opt_L d}
523 addOptP f d = d{ opt_P = f : opt_P d}
524 addOptF f d = d{ opt_F = f : opt_F d}
525 addOptc f d = d{ opt_c = f : opt_c d}
526 addOptm f d = d{ opt_m = f : opt_m d}
527 addOpta f d = d{ opt_a = f : opt_a d}
528 addOptl f d = d{ opt_l = f : opt_l d}
529 addOptdll f d = d{ opt_dll = f : opt_dll d}
530 addOptdep f d = d{ opt_dep = f : opt_dep d}
531
532 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
533
534 -- -----------------------------------------------------------------------------
535 -- Command-line options
536
537 -- When invoking external tools as part of the compilation pipeline, we
538 -- pass these a sequence of options on the command-line. Rather than
539 -- just using a list of Strings, we use a type that allows us to distinguish
540 -- between filepaths and 'other stuff'. [The reason being, of course, that
541 -- this type gives us a handle on transforming filenames, and filenames only,
542 -- to whatever format they're expected to be on a particular platform.]
543
544 data Option
545 = FileOption -- an entry that _contains_ filename(s) / filepaths.
546 String -- a non-filepath prefix that shouldn't be
547 -- transformed (e.g., "/out=")
548 String -- the filepath/filename portion
549 | Option String
550
551 -----------------------------------------------------------------------------
552 -- Setting the optimisation level
553
554 updOptLevel :: Int -> DynFlags -> DynFlags
555 -- Set dynflags appropriate to the optimisation level
556 updOptLevel n dfs
557 = dfs2{ optLevel = n }
558 where
559 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
560 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
561
562 extra_dopts = [ f | (ns,f) <- optLevelFlags, n `elem` ns ]
563 remove_dopts = [ f | (ns,f) <- optLevelFlags, n `notElem` ns ]
564
565 optLevelFlags :: [([Int], DynFlag)]
566 optLevelFlags
567 = [ ([0], Opt_IgnoreInterfacePragmas)
568 , ([0], Opt_OmitInterfacePragmas)
569
570 , ([1,2], Opt_IgnoreAsserts)
571 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
572 -- in PrelRules
573 , ([1,2], Opt_DoEtaReduction)
574 , ([1,2], Opt_CaseMerge)
575 , ([1,2], Opt_Strictness)
576 , ([1,2], Opt_CSE)
577 , ([1,2], Opt_FullLaziness)
578
579 , ([2], Opt_LiberateCase)
580 , ([2], Opt_SpecConstr)
581
582 , ([0,1,2], Opt_DoLambdaEtaExpansion)
583 -- This one is important for a tiresome reason:
584 -- we want to make sure that the bindings for data
585 -- constructors are eta-expanded. This is probably
586 -- a good thing anyway, but it seems fragile.
587 ]
588
589 -- -----------------------------------------------------------------------------
590 -- Standard sets of warning options
591
592 standardWarnings
593 = [ Opt_WarnDeprecations,
594 Opt_WarnOverlappingPatterns,
595 Opt_WarnMissingFields,
596 Opt_WarnMissingMethods,
597 Opt_WarnDuplicateExports
598 ]
599
600 minusWOpts
601 = standardWarnings ++
602 [ Opt_WarnUnusedBinds,
603 Opt_WarnUnusedMatches,
604 Opt_WarnUnusedImports,
605 Opt_WarnIncompletePatterns,
606 Opt_WarnDodgyImports
607 ]
608
609 minusWallOpts
610 = minusWOpts ++
611 [ Opt_WarnTypeDefaults,
612 Opt_WarnNameShadowing,
613 Opt_WarnMissingSigs,
614 Opt_WarnHiShadows,
615 Opt_WarnOrphans
616 ]
617
618 -- -----------------------------------------------------------------------------
619 -- CoreToDo: abstraction of core-to-core passes to run.
620
621 data CoreToDo -- These are diff core-to-core passes,
622 -- which may be invoked in any order,
623 -- as many times as you like.
624
625 = CoreDoSimplify -- The core-to-core simplifier.
626 SimplifierMode
627 [SimplifierSwitch]
628 -- Each run of the simplifier can take a different
629 -- set of simplifier-specific flags.
630 | CoreDoFloatInwards
631 | CoreDoFloatOutwards FloatOutSwitches
632 | CoreLiberateCase
633 | CoreDoPrintCore
634 | CoreDoStaticArgs
635 | CoreDoStrictness
636 | CoreDoWorkerWrapper
637 | CoreDoSpecialising
638 | CoreDoSpecConstr
639 | CoreDoOldStrictness
640 | CoreDoGlomBinds
641 | CoreCSE
642 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
643 -- matching this string
644 | CoreDoNothing -- Useful when building up
645 | CoreDoPasses [CoreToDo] -- lists of these things
646
647 data SimplifierMode -- See comments in SimplMonad
648 = SimplGently
649 | SimplPhase Int
650
651 data SimplifierSwitch
652 = MaxSimplifierIterations Int
653 | NoCaseOfCase
654
655 data FloatOutSwitches
656 = FloatOutSw Bool -- True <=> float lambdas to top level
657 Bool -- True <=> float constants to top level,
658 -- even if they do not escape a lambda
659
660
661 -- The core-to-core pass ordering is derived from the DynFlags:
662 runWhen :: Bool -> CoreToDo -> CoreToDo
663 runWhen True do_this = do_this
664 runWhen False do_this = CoreDoNothing
665
666 getCoreToDo :: DynFlags -> [CoreToDo]
667 getCoreToDo dflags
668 | Just todo <- coreToDo dflags = todo -- set explicitly by user
669 | otherwise = core_todo
670 where
671 opt_level = optLevel dflags
672 max_iter = maxSimplIterations dflags
673 strictness = dopt Opt_Strictness dflags
674 full_laziness = dopt Opt_FullLaziness dflags
675 cse = dopt Opt_CSE dflags
676 spec_constr = dopt Opt_SpecConstr dflags
677 liberate_case = dopt Opt_LiberateCase dflags
678 rule_check = ruleCheck dflags
679
680 core_todo =
681 if opt_level == 0 then
682 [
683 CoreDoSimplify (SimplPhase 0) [
684 MaxSimplifierIterations max_iter
685 ]
686 ]
687 else {- opt_level >= 1 -} [
688
689 -- initial simplify: mk specialiser happy: minimum effort please
690 CoreDoSimplify SimplGently [
691 -- Simplify "gently"
692 -- Don't inline anything till full laziness has bitten
693 -- In particular, inlining wrappers inhibits floating
694 -- e.g. ...(case f x of ...)...
695 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
696 -- ==> ...(case x of I# x# -> case fw x# of ...)...
697 -- and now the redex (f x) isn't floatable any more
698 -- Similarly, don't apply any rules until after full
699 -- laziness. Notably, list fusion can prevent floating.
700
701 NoCaseOfCase, -- Don't do case-of-case transformations.
702 -- This makes full laziness work better
703 MaxSimplifierIterations max_iter
704 ],
705
706 -- Specialisation is best done before full laziness
707 -- so that overloaded functions have all their dictionary lambdas manifest
708 CoreDoSpecialising,
709
710 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
711
712 CoreDoFloatInwards,
713
714 CoreDoSimplify (SimplPhase 2) [
715 -- Want to run with inline phase 2 after the specialiser to give
716 -- maximum chance for fusion to work before we inline build/augment
717 -- in phase 1. This made a difference in 'ansi' where an
718 -- overloaded function wasn't inlined till too late.
719 MaxSimplifierIterations max_iter
720 ],
721 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
722
723 CoreDoSimplify (SimplPhase 1) [
724 -- Need inline-phase2 here so that build/augment get
725 -- inlined. I found that spectral/hartel/genfft lost some useful
726 -- strictness in the function sumcode' if augment is not inlined
727 -- before strictness analysis runs
728 MaxSimplifierIterations max_iter
729 ],
730 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
731
732 CoreDoSimplify (SimplPhase 0) [
733 -- Phase 0: allow all Ids to be inlined now
734 -- This gets foldr inlined before strictness analysis
735
736 MaxSimplifierIterations 3
737 -- At least 3 iterations because otherwise we land up with
738 -- huge dead expressions because of an infelicity in the
739 -- simpifier.
740 -- let k = BIG in foldr k z xs
741 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
742 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
743 -- Don't stop now!
744
745 ],
746 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
747
748 #ifdef OLD_STRICTNESS
749 CoreDoOldStrictness,
750 #endif
751 runWhen strictness (CoreDoPasses [
752 CoreDoStrictness,
753 CoreDoWorkerWrapper,
754 CoreDoGlomBinds,
755 CoreDoSimplify (SimplPhase 0) [
756 MaxSimplifierIterations max_iter
757 ]]),
758
759 runWhen full_laziness
760 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
761 True)), -- Float constants
762 -- nofib/spectral/hartel/wang doubles in speed if you
763 -- do full laziness late in the day. It only happens
764 -- after fusion and other stuff, so the early pass doesn't
765 -- catch it. For the record, the redex is
766 -- f_el22 (f_el21 r_midblock)
767
768
769 runWhen cse CoreCSE,
770 -- We want CSE to follow the final full-laziness pass, because it may
771 -- succeed in commoning up things floated out by full laziness.
772 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
773
774 CoreDoFloatInwards,
775
776 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
777
778 -- Case-liberation for -O2. This should be after
779 -- strictness analysis and the simplification which follows it.
780 runWhen liberate_case (CoreDoPasses [
781 CoreLiberateCase,
782 CoreDoSimplify (SimplPhase 0) [
783 MaxSimplifierIterations max_iter
784 ] ]), -- Run the simplifier after LiberateCase to vastly
785 -- reduce the possiblility of shadowing
786 -- Reason: see Note [Shadowing] in SpecConstr.lhs
787
788 runWhen spec_constr CoreDoSpecConstr,
789
790 -- Final clean-up simplification:
791 CoreDoSimplify (SimplPhase 0) [
792 MaxSimplifierIterations max_iter
793 ]
794 ]
795
796 -- -----------------------------------------------------------------------------
797 -- StgToDo: abstraction of stg-to-stg passes to run.
798
799 data StgToDo
800 = StgDoMassageForProfiling -- should be (next to) last
801 -- There's also setStgVarInfo, but its absolute "lastness"
802 -- is so critical that it is hardwired in (no flag).
803 | D_stg_stats
804
805 getStgToDo :: DynFlags -> [StgToDo]
806 getStgToDo dflags
807 | Just todo <- stgToDo dflags = todo -- set explicitly by user
808 | otherwise = todo2
809 where
810 stg_stats = dopt Opt_StgStats dflags
811
812 todo1 = if stg_stats then [D_stg_stats] else []
813
814 todo2 | WayProf `elem` wayNames dflags
815 = StgDoMassageForProfiling : todo1
816 | otherwise
817 = todo1
818
819 -- -----------------------------------------------------------------------------
820 -- DynFlags parser
821
822 allFlags :: [String]
823 allFlags = map ('-':) $
824 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
825 map ("fno-"++) flags ++
826 map ("f"++) flags
827 where ok (PrefixPred _ _) = False
828 ok _ = True
829 flags = map fst fFlags
830
831 dynamic_flags :: [(String, OptKind DynP)]
832 dynamic_flags = [
833 ( "n" , NoArg (setDynFlag Opt_DryRun) )
834 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
835 , ( "F" , NoArg (setDynFlag Opt_Pp))
836 , ( "#include" , HasArg (addCmdlineHCInclude) )
837 , ( "v" , OptIntSuffix setVerbosity )
838
839 ------- Specific phases --------------------------------------------
840 , ( "pgmL" , HasArg (upd . setPgmL) )
841 , ( "pgmP" , HasArg (upd . setPgmP) )
842 , ( "pgmF" , HasArg (upd . setPgmF) )
843 , ( "pgmc" , HasArg (upd . setPgmc) )
844 , ( "pgmm" , HasArg (upd . setPgmm) )
845 , ( "pgms" , HasArg (upd . setPgms) )
846 , ( "pgma" , HasArg (upd . setPgma) )
847 , ( "pgml" , HasArg (upd . setPgml) )
848 , ( "pgmdll" , HasArg (upd . setPgmdll) )
849
850 , ( "optL" , HasArg (upd . addOptL) )
851 , ( "optP" , HasArg (upd . addOptP) )
852 , ( "optF" , HasArg (upd . addOptF) )
853 , ( "optc" , HasArg (upd . addOptc) )
854 , ( "optm" , HasArg (upd . addOptm) )
855 , ( "opta" , HasArg (upd . addOpta) )
856 , ( "optl" , HasArg (upd . addOptl) )
857 , ( "optdll" , HasArg (upd . addOptdll) )
858 , ( "optdep" , HasArg (upd . addOptdep) )
859
860 , ( "split-objs" , NoArg (if can_split
861 then setDynFlag Opt_SplitObjs
862 else return ()) )
863
864 -------- Linking ----------------------------------------------------
865 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
866 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
867 , ( "-mk-dll" , NoArg (upd $ \d -> d{ ghcLink=MkDLL } ))
868
869 ------- Libraries ---------------------------------------------------
870 , ( "L" , Prefix addLibraryPath )
871 , ( "l" , AnySuffix (\s -> do upd (addOptl s)
872 upd (addOptdll s)))
873
874 ------- Frameworks --------------------------------------------------
875 -- -framework-path should really be -F ...
876 , ( "framework-path" , HasArg addFrameworkPath )
877 , ( "framework" , HasArg (upd . addCmdlineFramework) )
878
879 ------- Output Redirection ------------------------------------------
880 , ( "odir" , HasArg (upd . setObjectDir . Just))
881 , ( "o" , SepArg (upd . setOutputFile . Just))
882 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
883 , ( "osuf" , HasArg (upd . setObjectSuf))
884 , ( "hcsuf" , HasArg (upd . setHcSuf))
885 , ( "hisuf" , HasArg (upd . setHiSuf))
886 , ( "hidir" , HasArg (upd . setHiDir . Just))
887 , ( "tmpdir" , HasArg (upd . setTmpDir))
888 , ( "stubdir" , HasArg (upd . setStubDir . Just))
889
890 ------- Keeping temporary files -------------------------------------
891 , ( "keep-hc-file" , AnySuffix (\_ -> setDynFlag Opt_KeepHcFiles))
892 , ( "keep-s-file" , AnySuffix (\_ -> setDynFlag Opt_KeepSFiles))
893 , ( "keep-raw-s-file", AnySuffix (\_ -> setDynFlag Opt_KeepRawSFiles))
894 , ( "keep-tmp-files" , AnySuffix (\_ -> setDynFlag Opt_KeepTmpFiles))
895
896 ------- Miscellaneous ----------------------------------------------
897 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
898 , ( "main-is" , SepArg setMainIs )
899 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
900 , ( "hpcdir" , SepArg setOptHpcDir )
901
902 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
903 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
904 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
905
906 ------- Packages ----------------------------------------------------
907 , ( "package-conf" , HasArg extraPkgConf_ )
908 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
909 , ( "package-name" , HasArg (upd . setPackageName) )
910 , ( "package" , HasArg exposePackage )
911 , ( "hide-package" , HasArg hidePackage )
912 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
913 , ( "ignore-package" , HasArg ignorePackage )
914 , ( "syslib" , HasArg exposePackage ) -- for compatibility
915
916 ------ HsCpp opts ---------------------------------------------------
917 , ( "D", AnySuffix (upd . addOptP) )
918 , ( "U", AnySuffix (upd . addOptP) )
919
920 ------- Include/Import Paths ----------------------------------------
921 , ( "I" , Prefix addIncludePath)
922 , ( "i" , OptPrefix addImportPath )
923
924 ------ Debugging ----------------------------------------------------
925 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
926
927 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
928 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
929 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
930 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
931 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
932 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
933 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
934 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
935 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
936 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
937 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
938 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
939 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
940 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
941 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
942 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
943 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
944 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
945 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
946 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
947 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
948 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
949 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
950 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
951 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
952 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
953 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
954 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
955 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
956 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
957 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
958 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
959 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
960 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
961 , ( "ddump-hi-diffs", setDumpFlag Opt_D_dump_hi_diffs)
962 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
963 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
964 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
965 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
966 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
967
968 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
969 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
970 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
971 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
972 setVerbosity (Just 2)) )
973 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
974
975 ------ Machine dependant (-m<blah>) stuff ---------------------------
976
977 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
978 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
979 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
980
981 ------ Warning opts -------------------------------------------------
982 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
983 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
984 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
985 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
986 , ( "w" , NoArg (mapM_ unSetDynFlag minusWallOpts) )
987
988 ------ Optimisation flags ------------------------------------------
989 , ( "O" , NoArg (upd (setOptLevel 1)))
990 , ( "Onot" , NoArg (upd (setOptLevel 0)))
991 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
992 -- If the number is missing, use 1
993
994 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
995 upd (\dfs -> dfs{ maxSimplIterations = n })) )
996
997 -- liberate-case-threshold is an old flag for '-fspec-threshold'
998 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
999 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1000
1001 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1002 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1003
1004 ------ Compiler flags -----------------------------------------------
1005
1006 , ( "fasm", AnySuffix (\_ -> setObjTarget HscAsm) )
1007 , ( "fvia-c", NoArg (setObjTarget HscC) )
1008 , ( "fvia-C", NoArg (setObjTarget HscC) )
1009
1010 , ( "fno-code", NoArg (setTarget HscNothing))
1011 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1012 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1013
1014 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1015 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1016
1017
1018 -- the rest of the -f* and -fno-* flags
1019 , ( "fno-", PrefixPred (\f -> isFFlag f) (\f -> unSetDynFlag (getFFlag f)) )
1020 , ( "f", PrefixPred (\f -> isFFlag f) (\f -> setDynFlag (getFFlag f)) )
1021 ]
1022
1023 -- these -f<blah> flags can all be reversed with -fno-<blah>
1024
1025 fFlags = [
1026 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1027 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1028 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1029 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1030 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1031 ( "warn-missing-fields", Opt_WarnMissingFields ),
1032 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1033 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1034 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1035 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1036 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1037 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1038 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1039 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1040 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1041 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1042 ( "warn-deprecations", Opt_WarnDeprecations ),
1043 ( "warn-orphans", Opt_WarnOrphans ),
1044 ( "warn-tabs", Opt_WarnTabs ),
1045 ( "fi", Opt_FFI ), -- support `-ffi'...
1046 ( "ffi", Opt_FFI ), -- ...and also `-fffi'
1047 ( "arrows", Opt_Arrows ), -- arrow syntax
1048 ( "parr", Opt_PArr ),
1049 ( "th", Opt_TH ),
1050 ( "implicit-prelude", Opt_ImplicitPrelude ),
1051 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1052 ( "bang-patterns", Opt_BangPatterns ),
1053 ( "overloaded-strings", Opt_OverloadedStrings ),
1054 ( "indexed-types", Opt_IndexedTypes ),
1055 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1056 ( "mono-pat-binds", Opt_MonoPatBinds ),
1057 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1058 ( "implicit-params", Opt_ImplicitParams ),
1059 ( "allow-overlapping-instances", Opt_AllowOverlappingInstances ),
1060 ( "allow-undecidable-instances", Opt_AllowUndecidableInstances ),
1061 ( "allow-incoherent-instances", Opt_AllowIncoherentInstances ),
1062 ( "generics", Opt_Generics ),
1063 ( "strictness", Opt_Strictness ),
1064 ( "full-laziness", Opt_FullLaziness ),
1065 ( "liberate-case", Opt_LiberateCase ),
1066 ( "spec-constr", Opt_SpecConstr ),
1067 ( "cse", Opt_CSE ),
1068 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1069 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1070 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1071 ( "ignore-asserts", Opt_IgnoreAsserts ),
1072 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1073 ( "do-eta-reduction", Opt_DoEtaReduction ),
1074 ( "case-merge", Opt_CaseMerge ),
1075 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1076 ( "dicts-cheap", Opt_DictsCheap ),
1077 ( "excess-precision", Opt_ExcessPrecision ),
1078 ( "asm-mangling", Opt_DoAsmMangling ),
1079 ( "print-bind-result", Opt_PrintBindResult ),
1080 ( "force-recomp", Opt_ForceRecomp ),
1081 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1082 ( "rewrite-rules", Opt_RewriteRules )
1083 ]
1084
1085
1086 glasgowExtsFlags = [
1087 Opt_GlasgowExts,
1088 Opt_FFI,
1089 Opt_ImplicitParams,
1090 Opt_ScopedTypeVariables,
1091 Opt_IndexedTypes ]
1092
1093 isFFlag f = f `elem` (map fst fFlags)
1094 getFFlag f = fromJust (lookup f fFlags)
1095
1096 -- -----------------------------------------------------------------------------
1097 -- Parsing the dynamic flags.
1098
1099 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1100 parseDynamicFlags dflags args = do
1101 let ((leftover,errs),dflags')
1102 = runCmdLine (processArgs dynamic_flags args) dflags
1103 when (not (null errs)) $ do
1104 throwDyn (UsageError (unlines errs))
1105 return (dflags', leftover)
1106
1107
1108 type DynP = CmdLineP DynFlags
1109
1110 upd :: (DynFlags -> DynFlags) -> DynP ()
1111 upd f = do
1112 dfs <- getCmdLineState
1113 putCmdLineState $! (f dfs)
1114
1115 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1116 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1117 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1118
1119 setDumpFlag :: DynFlag -> OptKind DynP
1120 setDumpFlag dump_flag
1121 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1122 -- Whenver we -ddump, switch off the recompilation checker,
1123 -- else you don't see the dump!
1124
1125 setVerbosity :: Maybe Int -> DynP ()
1126 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1127
1128 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1129
1130 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1131
1132 exposePackage p =
1133 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1134 hidePackage p =
1135 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1136 ignorePackage p =
1137 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1138
1139 setPackageName p
1140 | Nothing <- unpackPackageId pid
1141 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1142 | otherwise
1143 = \s -> s{ thisPackage = pid }
1144 where
1145 pid = stringToPackageId p
1146
1147 -- If we're linking a binary, then only targets that produce object
1148 -- code are allowed (requests for other target types are ignored).
1149 setTarget l = upd set
1150 where
1151 set dfs
1152 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1153 | otherwise = dfs
1154
1155 -- Changes the target only if we're compiling object code. This is
1156 -- used by -fasm and -fvia-C, which switch from one to the other, but
1157 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1158 -- can be safely used in an OPTIONS_GHC pragma.
1159 setObjTarget l = upd set
1160 where
1161 set dfs
1162 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1163 | otherwise = dfs
1164
1165 setOptLevel :: Int -> DynFlags -> DynFlags
1166 setOptLevel n dflags
1167 | hscTarget dflags == HscInterpreted && n > 0
1168 = dflags
1169 -- not in IO any more, oh well:
1170 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1171 | otherwise
1172 = updOptLevel n dflags
1173
1174
1175 setMainIs :: String -> DynP ()
1176 setMainIs arg
1177 | not (null main_fn) -- The arg looked like "Foo.baz"
1178 = upd $ \d -> d{ mainFunIs = Just main_fn,
1179 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1180
1181 | isUpper (head main_mod) -- The arg looked like "Foo"
1182 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1183
1184 | otherwise -- The arg looked like "baz"
1185 = upd $ \d -> d{ mainFunIs = Just main_mod }
1186 where
1187 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1188
1189 -----------------------------------------------------------------------------
1190 -- Paths & Libraries
1191
1192 -- -i on its own deletes the import paths
1193 addImportPath "" = upd (\s -> s{importPaths = []})
1194 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1195
1196
1197 addLibraryPath p =
1198 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1199
1200 addIncludePath p =
1201 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1202
1203 addFrameworkPath p =
1204 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1205
1206 split_marker = ':' -- not configurable (ToDo)
1207
1208 splitPathList :: String -> [String]
1209 splitPathList s = filter notNull (splitUp s)
1210 -- empty paths are ignored: there might be a trailing
1211 -- ':' in the initial list, for example. Empty paths can
1212 -- cause confusion when they are translated into -I options
1213 -- for passing to gcc.
1214 where
1215 #ifndef mingw32_TARGET_OS
1216 splitUp xs = split split_marker xs
1217 #else
1218 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1219 --
1220 -- That is, if "foo:bar:baz" is used, this interpreted as
1221 -- consisting of three entries, 'foo', 'bar', 'baz'.
1222 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1223 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1224 --
1225 -- Notice that no attempt is made to fully replace the 'standard'
1226 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1227 -- that this will cause too much breakage for users & ':' will
1228 -- work fine even with DOS paths, if you're not insisting on being silly.
1229 -- So, use either.
1230 splitUp [] = []
1231 splitUp (x:':':div:xs) | div `elem` dir_markers
1232 = ((x:':':div:p): splitUp rs)
1233 where
1234 (p,rs) = findNextPath xs
1235 -- we used to check for existence of the path here, but that
1236 -- required the IO monad to be threaded through the command-line
1237 -- parser which is quite inconvenient. The
1238 splitUp xs = cons p (splitUp rs)
1239 where
1240 (p,rs) = findNextPath xs
1241
1242 cons "" xs = xs
1243 cons x xs = x:xs
1244
1245 -- will be called either when we've consumed nought or the
1246 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1247 -- finding the next split marker.
1248 findNextPath xs =
1249 case break (`elem` split_markers) xs of
1250 (p, d:ds) -> (p, ds)
1251 (p, xs) -> (p, xs)
1252
1253 split_markers :: [Char]
1254 split_markers = [':', ';']
1255
1256 dir_markers :: [Char]
1257 dir_markers = ['/', '\\']
1258 #endif
1259
1260 -- -----------------------------------------------------------------------------
1261 -- tmpDir, where we store temporary files.
1262
1263 setTmpDir :: FilePath -> DynFlags -> DynFlags
1264 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1265 where
1266 #if !defined(mingw32_HOST_OS)
1267 canonicalise p = normalisePath p
1268 #else
1269 -- Canonicalisation of temp path under win32 is a bit more
1270 -- involved: (a) strip trailing slash,
1271 -- (b) normalise slashes
1272 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1273 --
1274 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1275
1276 -- if we're operating under cygwin, and TMP/TEMP is of
1277 -- the form "/cygdrive/drive/path", translate this to
1278 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1279 -- understand /cygdrive paths.)
1280 xltCygdrive path
1281 | "/cygdrive/" `isPrefixOf` path =
1282 case drop (length "/cygdrive/") path of
1283 drive:xs@('/':_) -> drive:':':xs
1284 _ -> path
1285 | otherwise = path
1286
1287 -- strip the trailing backslash (awful, but we only do this once).
1288 removeTrailingSlash path =
1289 case last path of
1290 '/' -> init path
1291 '\\' -> init path
1292 _ -> path
1293 #endif
1294
1295 -----------------------------------------------------------------------------
1296 -- Hpc stuff
1297
1298 setOptHpcDir :: String -> DynP ()
1299 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1300
1301 -----------------------------------------------------------------------------
1302 -- Via-C compilation stuff
1303
1304 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1305 [String]) -- for registerised HC compilations
1306 machdepCCOpts dflags
1307 #if alpha_TARGET_ARCH
1308 = ( ["-w", "-mieee"
1309 #ifdef HAVE_THREADED_RTS_SUPPORT
1310 , "-D_REENTRANT"
1311 #endif
1312 ], [] )
1313 -- For now, to suppress the gcc warning "call-clobbered
1314 -- register used for global register variable", we simply
1315 -- disable all warnings altogether using the -w flag. Oh well.
1316
1317 #elif hppa_TARGET_ARCH
1318 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1319 -- (very nice, but too bad the HP /usr/include files don't agree.)
1320 = ( ["-D_HPUX_SOURCE"], [] )
1321
1322 #elif m68k_TARGET_ARCH
1323 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1324 -- popping of args to routines to be explicit; if we let things
1325 -- be deferred 'til after an STGJUMP, imminent death is certain!
1326 --
1327 -- -fomit-frame-pointer : *don't*
1328 -- It's better to have a6 completely tied up being a frame pointer
1329 -- rather than let GCC pick random things to do with it.
1330 -- (If we want to steal a6, then we would try to do things
1331 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1332 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1333
1334 #elif i386_TARGET_ARCH
1335 -- -fno-defer-pop : basically the same game as for m68k
1336 --
1337 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1338 -- the fp (%ebp) for our register maps.
1339 = let n_regs = stolen_x86_regs dflags
1340 sta = opt_Static
1341 in
1342 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1343 -- , if suffixMatch "mingw32" cTARGETPLATFORM then "-mno-cygwin" else ""
1344 ],
1345 [ "-fno-defer-pop",
1346 #ifdef HAVE_GCC_MNO_OMIT_LFPTR
1347 -- Some gccs are configured with
1348 -- -momit-leaf-frame-pointer on by default, and it
1349 -- apparently takes precedence over
1350 -- -fomit-frame-pointer, so we disable it first here.
1351 "-mno-omit-leaf-frame-pointer",
1352 #endif
1353 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1354 "-fno-unit-at-a-time",
1355 -- unit-at-a-time doesn't do us any good, and screws
1356 -- up -split-objs by moving the split markers around.
1357 -- It's only turned on with -O2, but put it here just
1358 -- in case someone uses -optc-O2.
1359 #endif
1360 "-fomit-frame-pointer",
1361 -- we want -fno-builtin, because when gcc inlines
1362 -- built-in functions like memcpy() it tends to
1363 -- run out of registers, requiring -monly-n-regs
1364 "-fno-builtin",
1365 "-DSTOLEN_X86_REGS="++show n_regs ]
1366 )
1367
1368 #elif ia64_TARGET_ARCH
1369 = ( [], ["-fomit-frame-pointer", "-G0"] )
1370
1371 #elif x86_64_TARGET_ARCH
1372 = ( [], ["-fomit-frame-pointer",
1373 "-fno-asynchronous-unwind-tables",
1374 -- the unwind tables are unnecessary for HC code,
1375 -- and get in the way of -split-objs. Another option
1376 -- would be to throw them away in the mangler, but this
1377 -- is easier.
1378 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1379 "-fno-unit-at-a-time",
1380 -- unit-at-a-time doesn't do us any good, and screws
1381 -- up -split-objs by moving the split markers around.
1382 -- It's only turned on with -O2, but put it here just
1383 -- in case someone uses -optc-O2.
1384 #endif
1385 "-fno-builtin"
1386 -- calling builtins like strlen() using the FFI can
1387 -- cause gcc to run out of regs, so use the external
1388 -- version.
1389 ] )
1390
1391 #elif sparc_TARGET_ARCH
1392 = ( [], ["-w"] )
1393 -- For now, to suppress the gcc warning "call-clobbered
1394 -- register used for global register variable", we simply
1395 -- disable all warnings altogether using the -w flag. Oh well.
1396
1397 #elif powerpc_apple_darwin_TARGET
1398 -- -no-cpp-precomp:
1399 -- Disable Apple's precompiling preprocessor. It's a great thing
1400 -- for "normal" programs, but it doesn't support register variable
1401 -- declarations.
1402 = ( [], ["-no-cpp-precomp"] )
1403 #else
1404 = ( [], [] )
1405 #endif
1406
1407 picCCOpts :: DynFlags -> [String]
1408 picCCOpts dflags
1409 #if darwin_TARGET_OS
1410 -- Apple prefers to do things the other way round.
1411 -- PIC is on by default.
1412 -- -mdynamic-no-pic:
1413 -- Turn off PIC code generation.
1414 -- -fno-common:
1415 -- Don't generate "common" symbols - these are unwanted
1416 -- in dynamic libraries.
1417
1418 | opt_PIC
1419 = ["-fno-common"]
1420 | otherwise
1421 = ["-mdynamic-no-pic"]
1422 #elif mingw32_TARGET_OS
1423 -- no -fPIC for Windows
1424 = []
1425 #else
1426 | opt_PIC
1427 = ["-fPIC"]
1428 | otherwise
1429 = []
1430 #endif
1431
1432 -- -----------------------------------------------------------------------------
1433 -- Splitting
1434
1435 can_split :: Bool
1436 can_split =
1437 #if defined(i386_TARGET_ARCH) \
1438 || defined(x86_64_TARGET_ARCH) \
1439 || defined(alpha_TARGET_ARCH) \
1440 || defined(hppa_TARGET_ARCH) \
1441 || defined(m68k_TARGET_ARCH) \
1442 || defined(mips_TARGET_ARCH) \
1443 || defined(powerpc_TARGET_ARCH) \
1444 || defined(rs6000_TARGET_ARCH) \
1445 || defined(sparc_TARGET_ARCH)
1446 True
1447 #else
1448 False
1449 #endif
1450