ghc-9.8.1: The GHC API
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LanguageHaskell2010

GHC.Driver.Flags

Contents

Synopsis

Documentation

data DumpFlag Source #

Debugging flags

Constructors

Opt_D_dump_cmm 
Opt_D_dump_cmm_from_stg 
Opt_D_dump_cmm_raw 
Opt_D_dump_cmm_verbose_by_proc 
Opt_D_dump_cmm_verbose 
Opt_D_dump_cmm_cfg 
Opt_D_dump_cmm_cbe 
Opt_D_dump_cmm_switch 
Opt_D_dump_cmm_proc 
Opt_D_dump_cmm_sp 
Opt_D_dump_cmm_sink 
Opt_D_dump_cmm_caf 
Opt_D_dump_cmm_procmap 
Opt_D_dump_cmm_split 
Opt_D_dump_cmm_info 
Opt_D_dump_cmm_cps 
Opt_D_dump_cmm_thread_sanitizer 
Opt_D_dump_cfg_weights

Dump the cfg used for block layout.

Opt_D_dump_asm 
Opt_D_dump_asm_native 
Opt_D_dump_asm_liveness 
Opt_D_dump_asm_regalloc 
Opt_D_dump_asm_regalloc_stages 
Opt_D_dump_asm_conflicts 
Opt_D_dump_asm_stats 
Opt_D_dump_c_backend 
Opt_D_dump_llvm 
Opt_D_dump_js 
Opt_D_dump_core_stats 
Opt_D_dump_deriv 
Opt_D_dump_ds 
Opt_D_dump_ds_preopt 
Opt_D_dump_foreign 
Opt_D_dump_inlinings 
Opt_D_dump_verbose_inlinings 
Opt_D_dump_rule_firings 
Opt_D_dump_rule_rewrites 
Opt_D_dump_simpl_trace 
Opt_D_dump_occur_anal 
Opt_D_dump_parsed 
Opt_D_dump_parsed_ast 
Opt_D_dump_rn 
Opt_D_dump_rn_ast 
Opt_D_dump_simpl 
Opt_D_dump_simpl_iterations 
Opt_D_dump_spec 
Opt_D_dump_spec_constr 
Opt_D_dump_prep 
Opt_D_dump_late_cc 
Opt_D_dump_stg_from_core

Initial STG (CoreToStg output)

Opt_D_dump_stg_unarised

STG after unarise

Opt_D_dump_stg_cg

STG (after stg2stg)

Opt_D_dump_stg_tags

Result of tag inference analysis.

Opt_D_dump_stg_final

Final STG (before cmm gen)

Opt_D_dump_call_arity 
Opt_D_dump_exitify 
Opt_D_dump_stranal 
Opt_D_dump_str_signatures 
Opt_D_dump_cpranal 
Opt_D_dump_cpr_signatures 
Opt_D_dump_tc 
Opt_D_dump_tc_ast 
Opt_D_dump_hie 
Opt_D_dump_types 
Opt_D_dump_rules 
Opt_D_dump_cse 
Opt_D_dump_float_out 
Opt_D_dump_float_in 
Opt_D_dump_liberate_case 
Opt_D_dump_static_argument_transformation 
Opt_D_dump_worker_wrapper 
Opt_D_dump_rn_trace 
Opt_D_dump_rn_stats 
Opt_D_dump_opt_cmm 
Opt_D_dump_simpl_stats 
Opt_D_dump_cs_trace 
Opt_D_dump_tc_trace 
Opt_D_dump_ec_trace 
Opt_D_dump_if_trace 
Opt_D_dump_splices 
Opt_D_th_dec_file 
Opt_D_dump_BCOs 
Opt_D_dump_ticked 
Opt_D_dump_rtti 
Opt_D_source_stats 
Opt_D_verbose_stg2stg 
Opt_D_dump_hi 
Opt_D_dump_hi_diffs 
Opt_D_dump_mod_cycles 
Opt_D_dump_mod_map 
Opt_D_dump_timings 
Opt_D_dump_view_pattern_commoning 
Opt_D_verbose_core2core 
Opt_D_dump_debug 
Opt_D_dump_json 
Opt_D_ppr_debug 
Opt_D_no_debug_output 
Opt_D_dump_faststrings 
Opt_D_faststring_stats 

getDumpFlagFrom Source #

Arguments

:: (a -> Int)

Getter for verbosity setting

-> (a -> EnumSet DumpFlag)

Getter for the set of enabled dump flags

-> DumpFlag 
-> a 
-> Bool 

Helper function to query whether a given DumpFlag is enabled or not.

enabledIfVerbose :: DumpFlag -> Bool Source #

Is the flag implicitly enabled when the verbosity is high enough?

data GeneralFlag Source #

Enumerates the simple on-or-off dynamic flags

Constructors

Opt_DumpToFile

Append dump output to files instead of stdout.

Opt_DumpWithWays

Use foo.ways.dumpFlag instead of foo.dumpFlag

Opt_D_dump_minimal_imports 
Opt_DoCoreLinting 
Opt_DoLinearCoreLinting 
Opt_DoStgLinting 
Opt_DoCmmLinting 
Opt_DoAsmLinting 
Opt_DoAnnotationLinting 
Opt_DoBoundsChecking 
Opt_NoLlvmMangler 
Opt_FastLlvm 
Opt_NoTypeableBinds 
Opt_DistinctConstructorTables 
Opt_InfoTableMap 
Opt_WarnIsError 
Opt_ShowWarnGroups 
Opt_HideSourcePaths 
Opt_PrintExplicitForalls 
Opt_PrintExplicitKinds 
Opt_PrintExplicitCoercions 
Opt_PrintExplicitRuntimeReps 
Opt_PrintEqualityRelations 
Opt_PrintAxiomIncomps 
Opt_PrintUnicodeSyntax 
Opt_PrintExpandedSynonyms 
Opt_PrintPotentialInstances 
Opt_PrintRedundantPromotionTicks 
Opt_PrintTypecheckerElaboration 
Opt_CallArity 
Opt_Exitification 
Opt_Strictness 
Opt_LateDmdAnal 
Opt_KillAbsence 
Opt_KillOneShot 
Opt_FullLaziness 
Opt_FloatIn 
Opt_LocalFloatOut

Enable floating out of let-bindings in the simplifier

Opt_LocalFloatOutTopLevel

Enable floating out of let-bindings at the top level in the simplifier N.B. See Note [RHS Floating]

Opt_LateSpecialise 
Opt_Specialise 
Opt_SpecialiseAggressively 
Opt_CrossModuleSpecialise 
Opt_PolymorphicSpecialisation 
Opt_InlineGenerics 
Opt_InlineGenericsAggressively 
Opt_StaticArgumentTransformation 
Opt_CSE 
Opt_StgCSE 
Opt_StgLiftLams 
Opt_LiberateCase 
Opt_SpecConstr 
Opt_SpecConstrKeen 
Opt_SpecialiseIncoherents 
Opt_DoLambdaEtaExpansion 
Opt_IgnoreAsserts 
Opt_DoEtaReduction 
Opt_CaseMerge 
Opt_CaseFolding 
Opt_UnboxStrictFields 
Opt_UnboxSmallStrictFields 
Opt_DictsCheap 
Opt_EnableRewriteRules 
Opt_EnableThSpliceWarnings 
Opt_RegsGraph 
Opt_RegsIterative 
Opt_PedanticBottoms 
Opt_LlvmTBAA 
Opt_LlvmFillUndefWithGarbage 
Opt_IrrefutableTuples 
Opt_CmmSink 
Opt_CmmStaticPred 
Opt_CmmElimCommonBlocks 
Opt_CmmControlFlow 
Opt_AsmShortcutting 
Opt_OmitYields 
Opt_FunToThunk 
Opt_DictsStrict 
Opt_DmdTxDictSel

deprecated, no effect and behaviour is now default. Allowed switching of a special demand transformer for dictionary selectors

Opt_Loopification 
Opt_CfgBlocklayout

Use the cfg based block layout algorithm.

Opt_WeightlessBlocklayout

Layout based on last instruction per block.

Opt_CprAnal 
Opt_WorkerWrapper 
Opt_WorkerWrapperUnlift

Do W/W split for unlifting even if we won't unbox anything.

Opt_SolveConstantDicts 
Opt_AlignmentSanitisation 
Opt_CatchNonexhaustiveCases 
Opt_NumConstantFolding 
Opt_CoreConstantFolding 
Opt_FastPAPCalls 
Opt_DoTagInferenceChecks 
Opt_SimplPreInlining 
Opt_IgnoreInterfacePragmas 
Opt_OmitInterfacePragmas 
Opt_ExposeAllUnfoldings 
Opt_WriteInterface 
Opt_WriteHie 
Opt_DisableJsMinifier

render JavaScript pretty-printed instead of minified (compacted)

Opt_AutoSccsOnIndividualCafs 
Opt_ProfCountEntries 
Opt_ProfLateInlineCcs 
Opt_ProfLateCcs 
Opt_ProfManualCcs

Ignore manual SCC annotations

Opt_Pp 
Opt_ForceRecomp 
Opt_IgnoreOptimChanges 
Opt_IgnoreHpcChanges 
Opt_ExcessPrecision 
Opt_EagerBlackHoling 
Opt_NoHsMain 
Opt_SplitSections 
Opt_StgStats 
Opt_HideAllPackages 
Opt_HideAllPluginPackages 
Opt_PrintBindResult 
Opt_Haddock 
Opt_HaddockOptions 
Opt_BreakOnException 
Opt_BreakOnError 
Opt_PrintEvldWithShow 
Opt_PrintBindContents 
Opt_GenManifest 
Opt_EmbedManifest 
Opt_SharedImplib 
Opt_BuildingCabalPackage 
Opt_IgnoreDotGhci 
Opt_GhciSandbox 
Opt_InsertBreakpoints 
Opt_GhciHistory 
Opt_GhciLeakCheck 
Opt_ValidateHie 
Opt_LocalGhciHistory 
Opt_NoIt 
Opt_HelpfulErrors 
Opt_DeferTypeErrors 
Opt_DeferTypedHoles 
Opt_DeferOutOfScopeVariables 
Opt_PIC
-fPIC
Opt_PIE
-fPIE
Opt_PICExecutable
-pie
Opt_ExternalDynamicRefs 
Opt_Ticky 
Opt_Ticky_Allocd 
Opt_Ticky_LNE 
Opt_Ticky_Dyn_Thunk 
Opt_Ticky_Tag 
Opt_Ticky_AP

Use regular thunks even when we could use std ap thunks in order to get entry counts

Opt_CmmThreadSanitizer 
Opt_RPath 
Opt_RelativeDynlibPaths 
Opt_CompactUnwind
-fcompact-unwind
Opt_Hpc 
Opt_FamAppCache 
Opt_ExternalInterpreter 
Opt_OptimalApplicativeDo 
Opt_VersionMacros 
Opt_WholeArchiveHsLibs 
Opt_SingleLibFolder 
Opt_ExposeInternalSymbols 
Opt_KeepCAFs 
Opt_KeepGoing 
Opt_ByteCode 
Opt_ByteCodeAndObjectCode 
Opt_UnoptimizedCoreForInterpreter 
Opt_LinkRts 
Opt_ErrorSpans 
Opt_DeferDiagnostics 
Opt_DiagnosticsShowCaret 
Opt_PprCaseAsLet 
Opt_PprShowTicks 
Opt_ShowHoleConstraints 
Opt_ShowValidHoleFits 
Opt_SortValidHoleFits 
Opt_SortBySizeHoleFits 
Opt_SortBySubsumHoleFits 
Opt_AbstractRefHoleFits 
Opt_UnclutterValidHoleFits 
Opt_ShowTypeAppOfHoleFits 
Opt_ShowTypeAppVarsOfHoleFits 
Opt_ShowDocsOfHoleFits 
Opt_ShowTypeOfHoleFits 
Opt_ShowProvOfHoleFits 
Opt_ShowMatchesOfHoleFits 
Opt_ShowLoadedModules 
Opt_HexWordLiterals 
Opt_SuppressCoercions 
Opt_SuppressCoercionTypes 
Opt_SuppressVarKinds 
Opt_SuppressModulePrefixes 
Opt_SuppressTypeApplications 
Opt_SuppressIdInfo 
Opt_SuppressUnfoldings 
Opt_SuppressTypeSignatures 
Opt_SuppressUniques 
Opt_SuppressStgExts 
Opt_SuppressStgReps 
Opt_SuppressTicks 
Opt_SuppressTimestamps

Suppress timestamps in dumps

Opt_SuppressCoreSizes

Suppress per binding Core size stats in dumps

Opt_ShowErrorContext 
Opt_AutoLinkPackages 
Opt_ImplicitImportQualified 
Opt_KeepHscppFiles 
Opt_KeepHiDiffs 
Opt_KeepHcFiles 
Opt_KeepSFiles 
Opt_KeepTmpFiles 
Opt_KeepRawTokenStream 
Opt_KeepLlvmFiles 
Opt_KeepHiFiles 
Opt_KeepOFiles 
Opt_BuildDynamicToo 
Opt_WriteIfSimplifiedCore 
Opt_UseBytecodeRatherThanObjects 
Opt_DistrustAllPackages 
Opt_PackageTrust 
Opt_PluginTrustworthy 
Opt_G_NoStateHack 
Opt_G_NoOptCoercion 

optimisationFlags :: EnumSet GeneralFlag Source #

The set of flags which affect optimisation for the purposes of recompilation avoidance. Specifically, these include flags which affect code generation but not the semantics of the program.

See Note [Ignoring some flag changes] in GHC.Iface.Recomp.Flags)

codeGenFlags :: EnumSet GeneralFlag Source #

The set of flags which affect code generation and can change a program's runtime behavior (other than performance). These include flags which affect:

  • user visible debugging information (e.g. info table provenance)
  • the ability to catch runtime errors (e.g. -fignore-asserts)
  • the runtime result of the program (e.g. -fomit-yields)
  • which code or interface file declarations are emitted

We also considered placing flags which affect asympototic space behavior (e.g. -ffull-laziness) however this would mean that changing optimisation levels would trigger recompilation even with -fignore-optim-changes, regressing #13604.

Also, arguably Opt_IgnoreAsserts should be here as well; however, we place it instead in optimisationFlags since it is implied by -O[12] and therefore would also break #13604.

See #23369.

Warnings

warningGroupIncludesExtendedWarnings :: WarningGroup -> Bool Source #

Does this warning group contain (all) extended warning categories? See Note [Warning categories] in GHC.Unit.Module.Warnings.

The W_extended_warnings group contains extended warnings but no WarningFlags, but extended warnings are also treated as part of W_default and every warning group that includes it.

data WarningFlag Source #

Constructors

Opt_WarnDuplicateExports 
Opt_WarnDuplicateConstraints 
Opt_WarnRedundantConstraints 
Opt_WarnHiShadows 
Opt_WarnImplicitPrelude 
Opt_WarnIncompletePatterns 
Opt_WarnIncompleteUniPatterns 
Opt_WarnIncompletePatternsRecUpd 
Opt_WarnOverflowedLiterals 
Opt_WarnEmptyEnumerations 
Opt_WarnMissingFields 
Opt_WarnMissingImportList 
Opt_WarnMissingMethods 
Opt_WarnMissingSignatures 
Opt_WarnMissingLocalSignatures 
Opt_WarnNameShadowing 
Opt_WarnOverlappingPatterns 
Opt_WarnTypeDefaults 
Opt_WarnMonomorphism 
Opt_WarnUnusedTopBinds 
Opt_WarnUnusedLocalBinds 
Opt_WarnUnusedPatternBinds 
Opt_WarnUnusedImports 
Opt_WarnUnusedMatches 
Opt_WarnUnusedTypePatterns 
Opt_WarnUnusedForalls 
Opt_WarnUnusedRecordWildcards 
Opt_WarnRedundantBangPatterns 
Opt_WarnRedundantRecordWildcards 
Opt_WarnDeprecatedFlags 
Opt_WarnMissingMonadFailInstances 
Opt_WarnSemigroup 
Opt_WarnDodgyExports 
Opt_WarnDodgyImports 
Opt_WarnOrphans 
Opt_WarnAutoOrphans 
Opt_WarnIdentities 
Opt_WarnTabs 
Opt_WarnUnrecognisedPragmas 
Opt_WarnMisplacedPragmas 
Opt_WarnDodgyForeignImports 
Opt_WarnUnusedDoBind 
Opt_WarnWrongDoBind 
Opt_WarnAlternativeLayoutRuleTransitional 
Opt_WarnUnsafe 
Opt_WarnSafe 
Opt_WarnTrustworthySafe 
Opt_WarnMissedSpecs 
Opt_WarnAllMissedSpecs 
Opt_WarnUnsupportedCallingConventions 
Opt_WarnUnsupportedLlvmVersion 
Opt_WarnMissedExtraSharedLib 
Opt_WarnInlineRuleShadowing 
Opt_WarnTypedHoles 
Opt_WarnPartialTypeSignatures 
Opt_WarnMissingExportedSignatures 
Opt_WarnUntickedPromotedConstructors 
Opt_WarnDerivingTypeable 
Opt_WarnDeferredTypeErrors 
Opt_WarnDeferredOutOfScopeVariables 
Opt_WarnNonCanonicalMonadInstances 
Opt_WarnNonCanonicalMonadFailInstances 
Opt_WarnNonCanonicalMonoidInstances 
Opt_WarnMissingPatternSynonymSignatures 
Opt_WarnUnrecognisedWarningFlags 
Opt_WarnSimplifiableClassConstraints 
Opt_WarnCPPUndef 
Opt_WarnUnbangedStrictPatterns 
Opt_WarnMissingHomeModules 
Opt_WarnPartialFields 
Opt_WarnMissingExportList 
Opt_WarnInaccessibleCode 
Opt_WarnStarIsType 
Opt_WarnStarBinder 
Opt_WarnImplicitKindVars 
Opt_WarnSpaceAfterBang 
Opt_WarnMissingDerivingStrategies 
Opt_WarnPrepositiveQualifiedModule 
Opt_WarnUnusedPackages 
Opt_WarnInferredSafeImports 
Opt_WarnMissingSafeHaskellMode 
Opt_WarnCompatUnqualifiedImports 
Opt_WarnDerivingDefaults 
Opt_WarnInvalidHaddock 
Opt_WarnOperatorWhitespaceExtConflict 
Opt_WarnOperatorWhitespace 
Opt_WarnAmbiguousFields 
Opt_WarnImplicitLift 
Opt_WarnMissingKindSignatures 
Opt_WarnMissingPolyKindSignatures 
Opt_WarnMissingExportedPatternSynonymSignatures 
Opt_WarnRedundantStrictnessFlags 
Opt_WarnForallIdentifier 
Opt_WarnUnicodeBidirectionalFormatCharacters 
Opt_WarnGADTMonoLocalBinds 
Opt_WarnTypeEqualityOutOfScope 
Opt_WarnTypeEqualityRequiresOperators 
Opt_WarnLoopySuperclassSolve 
Opt_WarnTermVariableCapture 
Opt_WarnMissingRoleAnnotations 
Opt_WarnImplicitRhsQuantification 
Opt_WarnIncompleteExportWarnings 
Opt_WarnInconsistentFlags 

warnFlagNames :: WarningFlag -> NonEmpty String Source #

Return the names of a WarningFlag

One flag may have several names because of US/UK spelling. The first one is the "preferred one" that will be displayed in warning messages.

warningGroups :: [WarningGroup] Source #

Warning groups.

As all warnings are in the Weverything set, it is ignored when displaying to the user which group a warning is in.

warningHierarchies :: [[WarningGroup]] Source #

Warning group hierarchies, where there is an explicit inclusion relation.

Each inner list is a hierarchy of warning groups, ordered from smallest to largest, where each group is a superset of the one before it.

Separating this from warningGroups allows for multiple hierarchies with no inherent relation to be defined.

The special-case Weverything group is not included.

smallestWarningGroups :: WarningFlag -> [WarningGroup] Source #

Find the smallest group in every hierarchy which a warning belongs to, excluding Weverything.

smallestWarningGroupsForCategory :: [WarningGroup] Source #

The smallest group in every hierarchy to which a custom warning category belongs is currently always -Wextended-warnings. See Note [Warning categories] in GHC.Unit.Module.Warnings.

standardWarnings :: [WarningFlag] Source #

Warnings enabled unless specified otherwise

minusWOpts :: [WarningFlag] Source #

Things you get with -W

minusWallOpts :: [WarningFlag] Source #

Things you get with -Wall

minusWeverythingOpts :: [WarningFlag] Source #

Things you get with -Weverything, i.e. *all* known warnings flags

minusWcompatOpts :: [WarningFlag] Source #

Things you get with -Wcompat.

This is intended to group together warnings that will be enabled by default at some point in the future, so that library authors eager to make their code future compatible to fix issues before they even generate warnings.

unusedBindsFlags :: [WarningFlag] Source #

Things you get with -Wunused-binds