    -----------------------------------------------------------------------------
    --
    -- Object-file symbols (called CLabel for histerical raisins).
    --
    -- (c) The University of Glasgow 2004-2006
    --
    -----------------------------------------------------------------------------

    {-# LANGUAGE BangPatterns #-}
    {-# LANGUAGE MultiParamTypeClasses #-}
    {-# LANGUAGE FlexibleInstances #-}

    module GHC.Cmm.CLabel (
            CLabel, -- abstract type
            NeedExternDecl (..),
            ForeignLabelSource(..),
            DynamicLinkerLabelInfo(..),
            ConInfoTableLocation(..),
            getConInfoTableLocation,

            -- * Constructors
            mkClosureLabel,
            mkSRTLabel,
            mkInfoTableLabel,
            mkEntryLabel,
            mkRednCountsLabel,
            mkTagHitLabel,
            mkConInfoTableLabel,
            mkApEntryLabel,
            mkApInfoTableLabel,
            mkClosureTableLabel,
            mkBytesLabel,

            mkLocalBlockLabel,

            mkBlockInfoTableLabel,

            mkBitmapLabel,
            mkStringLitLabel,

            mkInitializerStubLabel,
            mkInitializerArrayLabel,
            mkFinalizerStubLabel,
            mkFinalizerArrayLabel,

            mkAsmTempLabel,
            mkAsmTempDerivedLabel,
            mkAsmTempEndLabel,
            mkAsmTempProcEndLabel,
            mkAsmTempDieLabel,

            mkDirty_MUT_VAR_Label,
            mkMUT_VAR_CLEAN_infoLabel,
            mkNonmovingWriteBarrierEnabledLabel,
            mkUpdInfoLabel,
            mkBHUpdInfoLabel,
            mkIndStaticInfoLabel,
            mkMainCapabilityLabel,
            mkMAP_FROZEN_CLEAN_infoLabel,
            mkMAP_FROZEN_DIRTY_infoLabel,
            mkMAP_DIRTY_infoLabel,
            mkSMAP_FROZEN_CLEAN_infoLabel,
            mkSMAP_FROZEN_DIRTY_infoLabel,
            mkSMAP_DIRTY_infoLabel,
            mkBadAlignmentLabel,
            mkOutOfBoundsAccessLabel,
            mkArrWords_infoLabel,
            mkSRTInfoLabel,

            mkTopTickyCtrLabel,
            mkCAFBlackHoleInfoTableLabel,
            mkRtsPrimOpLabel,
            mkRtsSlowFastTickyCtrLabel,

            mkSelectorInfoLabel,
            mkSelectorEntryLabel,
            mkCmmInfoLabel,
            mkCmmEntryLabel,
            mkCmmRetInfoLabel,
            mkCmmRetLabel,
            mkCmmCodeLabel,
            mkCmmDataLabel,
            mkRtsCmmDataLabel,
            mkCmmClosureLabel,
            mkRtsApFastLabel,
            mkPrimCallLabel,
            mkForeignLabel,
            mkCCLabel,
            mkCCSLabel,
            mkIPELabel,
            InfoProvEnt(..),

            mkDynamicLinkerLabel,
            mkPicBaseLabel,
            mkDeadStripPreventer,
            mkHpcTicksLabel,

            -- * Predicates
            hasCAF,
            needsCDecl,
            maybeLocalBlockLabel,
            externallyVisibleCLabel,
            isMathFun,
            isCFunctionLabel,
            isGcPtrLabel,
            labelDynamic,
            isLocalCLabel,
            mayRedirectTo,
            isInfoTableLabel,
            isConInfoTableLabel,
            isIdLabel,
            isTickyLabel,
            hasHaskellName,
            hasIdLabelInfo,
            isBytesLabel,
            isForeignLabel,
            isSomeRODataLabel,
            isStaticClosureLabel,

            -- * Conversions
            toClosureLbl,
            toSlowEntryLbl,
            toEntryLbl,
            toInfoLbl,

            -- * Pretty-printing
            LabelStyle (..),
            pprDebugCLabel,
            pprCLabel,
            ppInternalProcLabel,

            -- * Others
            dynamicLinkerLabelInfo,
            addLabelSize,
            foreignLabelStdcallInfo
        ) where

    import GHC.Prelude

    import GHC.Types.Id.Info
    import GHC.Types.Basic
    import {-# SOURCE #-} GHC.Cmm.BlockId (BlockId, mkBlockId)
    import GHC.Unit.Types
    import GHC.Types.Name
    import GHC.Types.Unique
    import GHC.Builtin.PrimOps
    import GHC.Types.CostCentre
    import GHC.Utils.Outputable
    import GHC.Utils.Panic
    import GHC.Utils.Panic.Plain
    import GHC.Data.FastString
    import GHC.Platform
    import GHC.Types.Unique.Set
    import GHC.Utils.Misc
    import GHC.Core.Ppr ( {- instances -} )
    import GHC.Types.SrcLoc

    -- -----------------------------------------------------------------------------
    -- The CLabel type

    {- |
      'CLabel' is an abstract type that supports the following operations:

      - Pretty printing

      - In a C file, does it need to be declared before use?  (i.e. is it
        guaranteed to be already in scope in the places we need to refer to it?)

      - If it needs to be declared, what type (code or data) should it be
        declared to have?

      - Is it visible outside this object file or not?

      - Is it "dynamic" (see details below)

      - Eq and Ord, so that we can make sets of CLabels (currently only
        used in outputting C as far as I can tell, to avoid generating
        more than one declaration for any given label).

      - Converting an info table label into an entry label.

      CLabel usage is a bit messy in GHC as they are used in a number of different
      contexts:

      - By the C-- AST to identify labels

      - By the unregisterised C code generator (\"PprC\") for naming functions (hence
        the name 'CLabel')

      - By the native and LLVM code generators to identify labels

      For extra fun, each of these uses a slightly different subset of constructors
      (e.g. 'AsmTempLabel' and 'AsmTempDerivedLabel' are used only in the NCG and
      LLVM backends).

      In general, we use 'IdLabel' to represent Haskell things early in the
      pipeline. However, later optimization passes will often represent blocks they
      create with 'LocalBlockLabel' where there is no obvious 'Name' to hang off the
      label.
    -}

    data CLabel
      = -- | A label related to the definition of a particular Id or Con in a .hs file.
        IdLabel
            Name
            CafInfo
            IdLabelInfo             -- ^ encodes the suffix of the label

      -- | A label from a .cmm file that is not associated with a .hs level Id.
      | CmmLabel
            UnitId                  -- ^ what package the label belongs to.
            NeedExternDecl          -- ^ does the label need an "extern .." declaration
            FastString              -- ^ identifier giving the prefix of the label
            CmmLabelInfo            -- ^ encodes the suffix of the label

      -- | A label with a baked-in \/ algorithmically generated name that definitely
      --    comes from the RTS. The code for it must compile into libHSrts.a \/ libHSrts.so
      --    If it doesn't have an algorithmically generated name then use a CmmLabel
      --    instead and give it an appropriate UnitId argument.
      | RtsLabel
            RtsLabelInfo

      -- | A label associated with a block. These aren't visible outside of the
      -- compilation unit in which they are defined. These are generally used to
      -- name blocks produced by Cmm-to-Cmm passes and the native code generator,
      -- where we don't have a 'Name' to associate the label to and therefore can't
      -- use 'IdLabel'.
      | LocalBlockLabel
            {-# UNPACK #-} !Unique

      -- | A 'C' (or otherwise foreign) label.
      --
      | ForeignLabel
            FastString              -- ^ name of the imported label.

            (Maybe Int)             -- ^ possible '@n' suffix for stdcall functions
                                    -- When generating C, the '@n' suffix is omitted, but when
                                    -- generating assembler we must add it to the label.

            ForeignLabelSource      -- ^ what package the foreign label is in.

            FunctionOrData

      -- | Local temporary label used for native (or LLVM) code generation; must not
      -- appear outside of these contexts. Use primarily for debug information
      | AsmTempLabel
            {-# UNPACK #-} !Unique

      -- | A label \"derived\" from another 'CLabel' by the addition of a suffix.
      -- Must not occur outside of the NCG or LLVM code generators.
      | AsmTempDerivedLabel
            CLabel
            FastString              -- ^ suffix

      | StringLitLabel
            {-# UNPACK #-} !Unique

      | CC_Label  CostCentre
      | CCS_Label CostCentreStack
      | IPE_Label InfoProvEnt

        -- | A per-module metadata label.
      | ModuleLabel !Module ModuleLabelKind

      -- | These labels are generated and used inside the NCG only.
      --    They are special variants of a label used for dynamic linking
      --    see module "GHC.CmmToAsm.PIC" for details.
      | DynamicLinkerLabel DynamicLinkerLabelInfo CLabel

      -- | This label is generated and used inside the NCG only.
      --    It is used as a base for PIC calculations on some platforms.
      --    It takes the form of a local numeric assembler label '1'; and
      --    is pretty-printed as 1b, referring to the previous definition
      --    of 1: in the assembler source file.
      | PicBaseLabel

      -- | A label before an info table to prevent excessive dead-stripping on darwin
      | DeadStripPreventer CLabel

      -- | Per-module table of tick locations
      | HpcTicksLabel Module

      -- | Static reference table
      | SRTLabel
            {-# UNPACK #-} !Unique

      -- | A bitmap (function or case return)
      | LargeBitmapLabel
            {-# UNPACK #-} !Unique

      deriving CLabel -> CLabel -> Bool
    (CLabel -> CLabel -> Bool)
    -> (CLabel -> CLabel -> Bool) -> Eq CLabel
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: CLabel -> CLabel -> Bool
    == :: CLabel -> CLabel -> Bool
    $c/= :: CLabel -> CLabel -> Bool
    /= :: CLabel -> CLabel -> Bool
    Eq

    instance Show CLabel where
      show :: CLabel -> String
    show = SDoc -> String
    forall a. Outputable a => a -> String
    showPprUnsafe (SDoc -> String) -> (CLabel -> SDoc) -> CLabel -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . Platform -> CLabel -> SDoc
    pprDebugCLabel Platform
    genericPlatform

    instance Outputable CLabel where
      ppr :: CLabel -> SDoc
    ppr = String -> SDoc
    text (String -> SDoc) -> (CLabel -> String) -> CLabel -> SDoc
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . CLabel -> String
    forall a. Show a => a -> String
    show

    data ModuleLabelKind
        = MLK_Initializer String
        | MLK_InitializerArray
        | MLK_Finalizer String
        | MLK_FinalizerArray
        deriving (ModuleLabelKind -> ModuleLabelKind -> Bool
    (ModuleLabelKind -> ModuleLabelKind -> Bool)
    -> (ModuleLabelKind -> ModuleLabelKind -> Bool)
    -> Eq ModuleLabelKind
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: ModuleLabelKind -> ModuleLabelKind -> Bool
    == :: ModuleLabelKind -> ModuleLabelKind -> Bool
    $c/= :: ModuleLabelKind -> ModuleLabelKind -> Bool
    /= :: ModuleLabelKind -> ModuleLabelKind -> Bool
    Eq, Eq ModuleLabelKind
    Eq ModuleLabelKind
    -> (ModuleLabelKind -> ModuleLabelKind -> Ordering)
    -> (ModuleLabelKind -> ModuleLabelKind -> Bool)
    -> (ModuleLabelKind -> ModuleLabelKind -> Bool)
    -> (ModuleLabelKind -> ModuleLabelKind -> Bool)
    -> (ModuleLabelKind -> ModuleLabelKind -> Bool)
    -> (ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind)
    -> (ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind)
    -> Ord ModuleLabelKind
    ModuleLabelKind -> ModuleLabelKind -> Bool
    ModuleLabelKind -> ModuleLabelKind -> Ordering
    ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: ModuleLabelKind -> ModuleLabelKind -> Ordering
    compare :: ModuleLabelKind -> ModuleLabelKind -> Ordering
    $c< :: ModuleLabelKind -> ModuleLabelKind -> Bool
    < :: ModuleLabelKind -> ModuleLabelKind -> Bool
    $c<= :: ModuleLabelKind -> ModuleLabelKind -> Bool
    <= :: ModuleLabelKind -> ModuleLabelKind -> Bool
    $c> :: ModuleLabelKind -> ModuleLabelKind -> Bool
    > :: ModuleLabelKind -> ModuleLabelKind -> Bool
    $c>= :: ModuleLabelKind -> ModuleLabelKind -> Bool
    >= :: ModuleLabelKind -> ModuleLabelKind -> Bool
    $cmax :: ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind
    max :: ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind
    $cmin :: ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind
    min :: ModuleLabelKind -> ModuleLabelKind -> ModuleLabelKind
    Ord)

    instance Outputable ModuleLabelKind where
        ppr :: ModuleLabelKind -> SDoc
    ppr ModuleLabelKind
    MLK_InitializerArray = String -> SDoc
    text String
    "init_arr"
        ppr (MLK_Initializer String
    s)  = String -> SDoc
    text (String
    "init__" String -> ShowS
    forall a. [a] -> [a] -> [a]
    ++ String
    s)
        ppr ModuleLabelKind
    MLK_FinalizerArray   = String -> SDoc
    text String
    "fini_arr"
        ppr (MLK_Finalizer String
    s)    = String -> SDoc
    text (String
    "fini__" String -> ShowS
    forall a. [a] -> [a] -> [a]
    ++ String
    s)

    isIdLabel :: CLabel -> Bool
    isIdLabel :: CLabel -> Bool
    isIdLabel IdLabel{} = Bool
    True
    isIdLabel CLabel
    _ = Bool
    False

    -- Used in SRT analysis. See Note [Ticky labels in SRT analysis] in
    -- GHC.Cmm.Info.Build.
    isTickyLabel :: CLabel -> Bool
    isTickyLabel :: CLabel -> Bool
    isTickyLabel (IdLabel Name
    _ CafInfo
    _ IdTickyInfo{}) = Bool
    True
    isTickyLabel CLabel
    _ = Bool
    False

    -- | Indicate if "GHC.CmmToC" has to generate an extern declaration for the
    -- label (e.g. "extern StgWordArray(foo)").  The type is fixed to StgWordArray.
    --
    -- Symbols from the RTS don't need "extern" declarations because they are
    -- exposed via "rts/include/Stg.h" with the appropriate type. See 'needsCDecl'.
    --
    -- The fixed StgWordArray type led to "conflicting types" issues with user
    -- provided Cmm files (not in the RTS) that declare data of another type (#15467
    -- and test for #17920).  Hence the Cmm parser considers that labels in data
    -- sections don't need the "extern" declaration (just add one explicitly if you
    -- need it).
    --
    -- See https://gitlab.haskell.org/ghc/ghc/-/wikis/commentary/compiler/backends/ppr-c#prototypes
    -- for why extern declaration are needed at all.
    newtype NeedExternDecl
       = NeedExternDecl Bool
       deriving (Eq NeedExternDecl
    Eq NeedExternDecl
    -> (NeedExternDecl -> NeedExternDecl -> Ordering)
    -> (NeedExternDecl -> NeedExternDecl -> Bool)
    -> (NeedExternDecl -> NeedExternDecl -> Bool)
    -> (NeedExternDecl -> NeedExternDecl -> Bool)
    -> (NeedExternDecl -> NeedExternDecl -> Bool)
    -> (NeedExternDecl -> NeedExternDecl -> NeedExternDecl)
    -> (NeedExternDecl -> NeedExternDecl -> NeedExternDecl)
    -> Ord NeedExternDecl
    NeedExternDecl -> NeedExternDecl -> Bool
    NeedExternDecl -> NeedExternDecl -> Ordering
    NeedExternDecl -> NeedExternDecl -> NeedExternDecl
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: NeedExternDecl -> NeedExternDecl -> Ordering
    compare :: NeedExternDecl -> NeedExternDecl -> Ordering
    $c< :: NeedExternDecl -> NeedExternDecl -> Bool
    < :: NeedExternDecl -> NeedExternDecl -> Bool
    $c<= :: NeedExternDecl -> NeedExternDecl -> Bool
    <= :: NeedExternDecl -> NeedExternDecl -> Bool
    $c> :: NeedExternDecl -> NeedExternDecl -> Bool
    > :: NeedExternDecl -> NeedExternDecl -> Bool
    $c>= :: NeedExternDecl -> NeedExternDecl -> Bool
    >= :: NeedExternDecl -> NeedExternDecl -> Bool
    $cmax :: NeedExternDecl -> NeedExternDecl -> NeedExternDecl
    max :: NeedExternDecl -> NeedExternDecl -> NeedExternDecl
    $cmin :: NeedExternDecl -> NeedExternDecl -> NeedExternDecl
    min :: NeedExternDecl -> NeedExternDecl -> NeedExternDecl
    Ord,NeedExternDecl -> NeedExternDecl -> Bool
    (NeedExternDecl -> NeedExternDecl -> Bool)
    -> (NeedExternDecl -> NeedExternDecl -> Bool) -> Eq NeedExternDecl
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: NeedExternDecl -> NeedExternDecl -> Bool
    == :: NeedExternDecl -> NeedExternDecl -> Bool
    $c/= :: NeedExternDecl -> NeedExternDecl -> Bool
    /= :: NeedExternDecl -> NeedExternDecl -> Bool
    Eq)

    -- This is laborious, but necessary. We can't derive Ord because
    -- Unique doesn't have an Ord instance. Note nonDetCmpUnique in the
    -- implementation. See Note [No Ord for Unique]
    -- This is non-deterministic but we do not currently support deterministic
    -- code-generation. See Note [Unique Determinism and code generation]
    instance Ord CLabel where
      compare :: CLabel -> CLabel -> Ordering
    compare (IdLabel Name
    a1 CafInfo
    b1 IdLabelInfo
    c1) (IdLabel Name
    a2 CafInfo
    b2 IdLabelInfo
    c2) =
        Name -> Name -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare Name
    a1 Name
    a2 Ordering -> Ordering -> Ordering
    `thenCmp`
        CafInfo -> CafInfo -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CafInfo
    b1 CafInfo
    b2 Ordering -> Ordering -> Ordering
    `thenCmp`
        IdLabelInfo -> IdLabelInfo -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare IdLabelInfo
    c1 IdLabelInfo
    c2
      compare (CmmLabel UnitId
    a1 NeedExternDecl
    b1 FastString
    c1 CmmLabelInfo
    d1) (CmmLabel UnitId
    a2 NeedExternDecl
    b2 FastString
    c2 CmmLabelInfo
    d2) =
        UnitId -> UnitId -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare UnitId
    a1 UnitId
    a2 Ordering -> Ordering -> Ordering
    `thenCmp`
        NeedExternDecl -> NeedExternDecl -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare NeedExternDecl
    b1 NeedExternDecl
    b2 Ordering -> Ordering -> Ordering
    `thenCmp`
        -- This non-determinism is "safe" in the sense that it only affects object code,
        -- which is currently not covered by GHC's determinism guarantees. See #12935.
        FastString -> FastString -> Ordering
    uniqCompareFS FastString
    c1 FastString
    c2 Ordering -> Ordering -> Ordering
    `thenCmp`
        CmmLabelInfo -> CmmLabelInfo -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CmmLabelInfo
    d1 CmmLabelInfo
    d2
      compare (RtsLabel RtsLabelInfo
    a1) (RtsLabel RtsLabelInfo
    a2) = RtsLabelInfo -> RtsLabelInfo -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare RtsLabelInfo
    a1 RtsLabelInfo
    a2
      compare (LocalBlockLabel Unique
    u1) (LocalBlockLabel Unique
    u2) = Unique -> Unique -> Ordering
    nonDetCmpUnique Unique
    u1 Unique
    u2
      compare (ForeignLabel FastString
    a1 Maybe Int
    b1 ForeignLabelSource
    c1 FunctionOrData
    d1) (ForeignLabel FastString
    a2 Maybe Int
    b2 ForeignLabelSource
    c2 FunctionOrData
    d2) =
        FastString -> FastString -> Ordering
    uniqCompareFS FastString
    a1 FastString
    a2 Ordering -> Ordering -> Ordering
    `thenCmp`
        Maybe Int -> Maybe Int -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare Maybe Int
    b1 Maybe Int
    b2 Ordering -> Ordering -> Ordering
    `thenCmp`
        ForeignLabelSource -> ForeignLabelSource -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare ForeignLabelSource
    c1 ForeignLabelSource
    c2 Ordering -> Ordering -> Ordering
    `thenCmp`
        FunctionOrData -> FunctionOrData -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare FunctionOrData
    d1 FunctionOrData
    d2
      compare (AsmTempLabel Unique
    u1) (AsmTempLabel Unique
    u2) = Unique -> Unique -> Ordering
    nonDetCmpUnique Unique
    u1 Unique
    u2
      compare (AsmTempDerivedLabel CLabel
    a1 FastString
    b1) (AsmTempDerivedLabel CLabel
    a2 FastString
    b2) =
        CLabel -> CLabel -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CLabel
    a1 CLabel
    a2 Ordering -> Ordering -> Ordering
    `thenCmp`
        FastString -> FastString -> Ordering
    lexicalCompareFS FastString
    b1 FastString
    b2
      compare (StringLitLabel Unique
    u1) (StringLitLabel Unique
    u2) =
        Unique -> Unique -> Ordering
    nonDetCmpUnique Unique
    u1 Unique
    u2
      compare (CC_Label CostCentre
    a1) (CC_Label CostCentre
    a2) =
        CostCentre -> CostCentre -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CostCentre
    a1 CostCentre
    a2
      compare (CCS_Label CostCentreStack
    a1) (CCS_Label CostCentreStack
    a2) =
        CostCentreStack -> CostCentreStack -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CostCentreStack
    a1 CostCentreStack
    a2
      compare (IPE_Label InfoProvEnt
    a1) (IPE_Label InfoProvEnt
    a2) =
        InfoProvEnt -> InfoProvEnt -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare InfoProvEnt
    a1 InfoProvEnt
    a2
      compare (ModuleLabel Module
    m1 ModuleLabelKind
    k1) (ModuleLabel Module
    m2 ModuleLabelKind
    k2) =
        Module -> Module -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare Module
    m1 Module
    m2 Ordering -> Ordering -> Ordering
    `thenCmp`
        ModuleLabelKind -> ModuleLabelKind -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare ModuleLabelKind
    k1 ModuleLabelKind
    k2
      compare (DynamicLinkerLabel DynamicLinkerLabelInfo
    a1 CLabel
    b1) (DynamicLinkerLabel DynamicLinkerLabelInfo
    a2 CLabel
    b2) =
        DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare DynamicLinkerLabelInfo
    a1 DynamicLinkerLabelInfo
    a2 Ordering -> Ordering -> Ordering
    `thenCmp`
        CLabel -> CLabel -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CLabel
    b1 CLabel
    b2
      compare CLabel
    PicBaseLabel CLabel
    PicBaseLabel = Ordering
    EQ
      compare (DeadStripPreventer CLabel
    a1) (DeadStripPreventer CLabel
    a2) =
        CLabel -> CLabel -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare CLabel
    a1 CLabel
    a2
      compare (HpcTicksLabel Module
    a1) (HpcTicksLabel Module
    a2) =
        Module -> Module -> Ordering
    forall a. Ord a => a -> a -> Ordering
    compare Module
    a1 Module
    a2
      compare (SRTLabel Unique
    u1) (SRTLabel Unique
    u2) =
        Unique -> Unique -> Ordering
    nonDetCmpUnique Unique
    u1 Unique
    u2
      compare (LargeBitmapLabel Unique
    u1) (LargeBitmapLabel Unique
    u2) =
        Unique -> Unique -> Ordering
    nonDetCmpUnique Unique
    u1 Unique
    u2
      compare IdLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ IdLabel{} = Ordering
    GT
      compare CmmLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ CmmLabel{} = Ordering
    GT
      compare RtsLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ RtsLabel{} = Ordering
    GT
      compare LocalBlockLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ LocalBlockLabel{} = Ordering
    GT
      compare ForeignLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ ForeignLabel{} = Ordering
    GT
      compare AsmTempLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ AsmTempLabel{} = Ordering
    GT
      compare AsmTempDerivedLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ AsmTempDerivedLabel{} = Ordering
    GT
      compare StringLitLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ StringLitLabel{} = Ordering
    GT
      compare CC_Label{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ CC_Label{} = Ordering
    GT
      compare CCS_Label{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ CCS_Label{} = Ordering
    GT
      compare DynamicLinkerLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ DynamicLinkerLabel{} = Ordering
    GT
      compare PicBaseLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ PicBaseLabel{} = Ordering
    GT
      compare DeadStripPreventer{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ DeadStripPreventer{} = Ordering
    GT
      compare HpcTicksLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ HpcTicksLabel{} = Ordering
    GT
      compare SRTLabel{} CLabel
    _ = Ordering
    LT
      compare CLabel
    _ SRTLabel{} = Ordering
    GT
      compare (IPE_Label {}) CLabel
    _ = Ordering
    LT
      compare  CLabel
    _ (IPE_Label{}) = Ordering
    GT
      compare (ModuleLabel {}) CLabel
    _ = Ordering
    LT
      compare  CLabel
    _ (ModuleLabel{}) = Ordering
    GT

    -- | Record where a foreign label is stored.
    data ForeignLabelSource

       -- | Label is in a named package
       = ForeignLabelInPackage UnitId

       -- | Label is in some external, system package that doesn't also
       --   contain compiled Haskell code, and is not associated with any .hi files.
       --   We don't have to worry about Haskell code being inlined from
       --   external packages. It is safe to treat the RTS package as "external".
       | ForeignLabelInExternalPackage

       -- | Label is in the package currently being compiled.
       --   This is only used for creating hacky tmp labels during code generation.
       --   Don't use it in any code that might be inlined across a package boundary
       --   (ie, core code) else the information will be wrong relative to the
       --   destination module.
       | ForeignLabelInThisPackage

       deriving (ForeignLabelSource -> ForeignLabelSource -> Bool
    (ForeignLabelSource -> ForeignLabelSource -> Bool)
    -> (ForeignLabelSource -> ForeignLabelSource -> Bool)
    -> Eq ForeignLabelSource
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: ForeignLabelSource -> ForeignLabelSource -> Bool
    == :: ForeignLabelSource -> ForeignLabelSource -> Bool
    $c/= :: ForeignLabelSource -> ForeignLabelSource -> Bool
    /= :: ForeignLabelSource -> ForeignLabelSource -> Bool
    Eq, Eq ForeignLabelSource
    Eq ForeignLabelSource
    -> (ForeignLabelSource -> ForeignLabelSource -> Ordering)
    -> (ForeignLabelSource -> ForeignLabelSource -> Bool)
    -> (ForeignLabelSource -> ForeignLabelSource -> Bool)
    -> (ForeignLabelSource -> ForeignLabelSource -> Bool)
    -> (ForeignLabelSource -> ForeignLabelSource -> Bool)
    -> (ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource)
    -> (ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource)
    -> Ord ForeignLabelSource
    ForeignLabelSource -> ForeignLabelSource -> Bool
    ForeignLabelSource -> ForeignLabelSource -> Ordering
    ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: ForeignLabelSource -> ForeignLabelSource -> Ordering
    compare :: ForeignLabelSource -> ForeignLabelSource -> Ordering
    $c< :: ForeignLabelSource -> ForeignLabelSource -> Bool
    < :: ForeignLabelSource -> ForeignLabelSource -> Bool
    $c<= :: ForeignLabelSource -> ForeignLabelSource -> Bool
    <= :: ForeignLabelSource -> ForeignLabelSource -> Bool
    $c> :: ForeignLabelSource -> ForeignLabelSource -> Bool
    > :: ForeignLabelSource -> ForeignLabelSource -> Bool
    $c>= :: ForeignLabelSource -> ForeignLabelSource -> Bool
    >= :: ForeignLabelSource -> ForeignLabelSource -> Bool
    $cmax :: ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource
    max :: ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource
    $cmin :: ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource
    min :: ForeignLabelSource -> ForeignLabelSource -> ForeignLabelSource
    Ord)

    -- | For debugging problems with the CLabel representation.
    --      We can't make a Show instance for CLabel because lots of its components don't have instances.
    --      The regular Outputable instance only shows the label name, and not its other info.
    --
    pprDebugCLabel :: Platform -> CLabel -> SDoc
    pprDebugCLabel :: Platform -> CLabel -> SDoc
    pprDebugCLabel Platform
    platform CLabel
    lbl = Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel Platform
    platform LabelStyle
    AsmStyle CLabel
    lbl SDoc -> SDoc -> SDoc
    <> SDoc -> SDoc
    parens SDoc
    extra
       where
          extra :: SDoc
    extra = case CLabel
    lbl of
             IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    info
                -> String -> SDoc
    text String
    "IdLabel" SDoc -> SDoc -> SDoc
    <> SDoc -> SDoc
    whenPprDebug (String -> SDoc
    text String
    ":" SDoc -> SDoc -> SDoc
    <> IdLabelInfo -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr IdLabelInfo
    info)

             CmmLabel UnitId
    pkg NeedExternDecl
    _ext FastString
    _name CmmLabelInfo
    _info
                -> String -> SDoc
    text String
    "CmmLabel" SDoc -> SDoc -> SDoc
    <+> UnitId -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr UnitId
    pkg

             RtsLabel{}
                -> String -> SDoc
    text String
    "RtsLabel"

             ForeignLabel FastString
    _name Maybe Int
    mSuffix ForeignLabelSource
    src FunctionOrData
    funOrData
                 -> String -> SDoc
    text String
    "ForeignLabel" SDoc -> SDoc -> SDoc
    <+> Maybe Int -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Maybe Int
    mSuffix SDoc -> SDoc -> SDoc
    <+> ForeignLabelSource -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr ForeignLabelSource
    src SDoc -> SDoc -> SDoc
    <+> FunctionOrData -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr FunctionOrData
    funOrData

             CLabel
    _  -> String -> SDoc
    text String
    "other CLabel"

    -- Dynamic ticky info for the id.
    data TickyIdInfo
      = TickyRednCounts           -- ^ Used for dynamic allocations
      | TickyInferedTag !Unique    -- ^ Used to track dynamic hits of tag inference.
      deriving (TickyIdInfo -> TickyIdInfo -> Bool
    (TickyIdInfo -> TickyIdInfo -> Bool)
    -> (TickyIdInfo -> TickyIdInfo -> Bool) -> Eq TickyIdInfo
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: TickyIdInfo -> TickyIdInfo -> Bool
    == :: TickyIdInfo -> TickyIdInfo -> Bool
    $c/= :: TickyIdInfo -> TickyIdInfo -> Bool
    /= :: TickyIdInfo -> TickyIdInfo -> Bool
    Eq,Int -> TickyIdInfo -> ShowS
    [TickyIdInfo] -> ShowS
    TickyIdInfo -> String
    (Int -> TickyIdInfo -> ShowS)
    -> (TickyIdInfo -> String)
    -> ([TickyIdInfo] -> ShowS)
    -> Show TickyIdInfo
    forall a.
    (Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
    $cshowsPrec :: Int -> TickyIdInfo -> ShowS
    showsPrec :: Int -> TickyIdInfo -> ShowS
    $cshow :: TickyIdInfo -> String
    show :: TickyIdInfo -> String
    $cshowList :: [TickyIdInfo] -> ShowS
    showList :: [TickyIdInfo] -> ShowS
    Show)

    instance Outputable TickyIdInfo where
        ppr :: TickyIdInfo -> SDoc
    ppr TickyIdInfo
    TickyRednCounts = String -> SDoc
    text String
    "ct_rdn"
        ppr (TickyInferedTag Unique
    unique) = String -> SDoc
    text String
    "ct_tag[" SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Unique
    unique SDoc -> SDoc -> SDoc
    <> Char -> SDoc
    char Char
    ']'

    -- | Don't depend on this if you need determinism.
    -- No determinism in the ncg backend, so we use the unique for Ord.
    -- Even if it pains me slightly.
    instance Ord TickyIdInfo where
        compare :: TickyIdInfo -> TickyIdInfo -> Ordering
    compare TickyIdInfo
    TickyRednCounts TickyIdInfo
    TickyRednCounts = Ordering
    EQ
        compare TickyIdInfo
    TickyRednCounts TickyIdInfo
    _ = Ordering
    LT
        compare TickyIdInfo
    _ TickyIdInfo
    TickyRednCounts = Ordering
    GT
        compare (TickyInferedTag Unique
    unique1) (TickyInferedTag Unique
    unique2) =
          Unique -> Unique -> Ordering
    nonDetCmpUnique Unique
    unique1 Unique
    unique2

    data IdLabelInfo
      = Closure             -- ^ Label for closure
      | InfoTable           -- ^ Info tables for closures; always read-only
      | Entry               -- ^ Entry point
      | Slow                -- ^ Slow entry point

      | LocalInfoTable      -- ^ Like InfoTable but not externally visible
      | LocalEntry          -- ^ Like Entry but not externally visible

      | IdTickyInfo !TickyIdInfo -- ^ Label of place to keep Ticky-ticky hit info for this Id

      | ConEntry ConInfoTableLocation
      -- ^ Constructor entry point, when `-fdistinct-info-tables` is enabled then
      -- each usage of a constructor will be given a unique number and a fresh info
      -- table will be created in the module where the constructor is used. The
      -- argument is used to keep track of which info table a usage of a constructor
      -- should use. When the argument is 'Nothing' then it uses the info table which
      -- is defined in the module where the datatype is declared, this is the usual case.
      -- When it is (Just (m, k)) it will use the kth info table defined in module m. The
      -- point of this inefficiency is so that you can work out where allocations of data
      -- constructors are coming from when you are debugging.

      | ConInfoTable ConInfoTableLocation        -- ^ Corresponding info table

      | ClosureTable        -- ^ Table of closures for Enum tycons

      | Bytes               -- ^ Content of a string literal. See
                            -- Note [Bytes label].
      | BlockInfoTable      -- ^ Like LocalInfoTable but for a proc-point block
                            -- instead of a closure entry-point.
                            -- See Note [Proc-point local block entry-points].

      deriving (IdLabelInfo -> IdLabelInfo -> Bool
    (IdLabelInfo -> IdLabelInfo -> Bool)
    -> (IdLabelInfo -> IdLabelInfo -> Bool) -> Eq IdLabelInfo
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: IdLabelInfo -> IdLabelInfo -> Bool
    == :: IdLabelInfo -> IdLabelInfo -> Bool
    $c/= :: IdLabelInfo -> IdLabelInfo -> Bool
    /= :: IdLabelInfo -> IdLabelInfo -> Bool
    Eq, Eq IdLabelInfo
    Eq IdLabelInfo
    -> (IdLabelInfo -> IdLabelInfo -> Ordering)
    -> (IdLabelInfo -> IdLabelInfo -> Bool)
    -> (IdLabelInfo -> IdLabelInfo -> Bool)
    -> (IdLabelInfo -> IdLabelInfo -> Bool)
    -> (IdLabelInfo -> IdLabelInfo -> Bool)
    -> (IdLabelInfo -> IdLabelInfo -> IdLabelInfo)
    -> (IdLabelInfo -> IdLabelInfo -> IdLabelInfo)
    -> Ord IdLabelInfo
    IdLabelInfo -> IdLabelInfo -> Bool
    IdLabelInfo -> IdLabelInfo -> Ordering
    IdLabelInfo -> IdLabelInfo -> IdLabelInfo
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: IdLabelInfo -> IdLabelInfo -> Ordering
    compare :: IdLabelInfo -> IdLabelInfo -> Ordering
    $c< :: IdLabelInfo -> IdLabelInfo -> Bool
    < :: IdLabelInfo -> IdLabelInfo -> Bool
    $c<= :: IdLabelInfo -> IdLabelInfo -> Bool
    <= :: IdLabelInfo -> IdLabelInfo -> Bool
    $c> :: IdLabelInfo -> IdLabelInfo -> Bool
    > :: IdLabelInfo -> IdLabelInfo -> Bool
    $c>= :: IdLabelInfo -> IdLabelInfo -> Bool
    >= :: IdLabelInfo -> IdLabelInfo -> Bool
    $cmax :: IdLabelInfo -> IdLabelInfo -> IdLabelInfo
    max :: IdLabelInfo -> IdLabelInfo -> IdLabelInfo
    $cmin :: IdLabelInfo -> IdLabelInfo -> IdLabelInfo
    min :: IdLabelInfo -> IdLabelInfo -> IdLabelInfo
    Ord)

    -- | Which module is the info table from, and which number was it.
    data ConInfoTableLocation = UsageSite Module Int
                              | DefinitionSite
                                  deriving (ConInfoTableLocation -> ConInfoTableLocation -> Bool
    (ConInfoTableLocation -> ConInfoTableLocation -> Bool)
    -> (ConInfoTableLocation -> ConInfoTableLocation -> Bool)
    -> Eq ConInfoTableLocation
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    == :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    $c/= :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    /= :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    Eq, Eq ConInfoTableLocation
    Eq ConInfoTableLocation
    -> (ConInfoTableLocation -> ConInfoTableLocation -> Ordering)
    -> (ConInfoTableLocation -> ConInfoTableLocation -> Bool)
    -> (ConInfoTableLocation -> ConInfoTableLocation -> Bool)
    -> (ConInfoTableLocation -> ConInfoTableLocation -> Bool)
    -> (ConInfoTableLocation -> ConInfoTableLocation -> Bool)
    -> (ConInfoTableLocation
        -> ConInfoTableLocation -> ConInfoTableLocation)
    -> (ConInfoTableLocation
        -> ConInfoTableLocation -> ConInfoTableLocation)
    -> Ord ConInfoTableLocation
    ConInfoTableLocation -> ConInfoTableLocation -> Bool
    ConInfoTableLocation -> ConInfoTableLocation -> Ordering
    ConInfoTableLocation
    -> ConInfoTableLocation -> ConInfoTableLocation
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: ConInfoTableLocation -> ConInfoTableLocation -> Ordering
    compare :: ConInfoTableLocation -> ConInfoTableLocation -> Ordering
    $c< :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    < :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    $c<= :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    <= :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    $c> :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    > :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    $c>= :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    >= :: ConInfoTableLocation -> ConInfoTableLocation -> Bool
    $cmax :: ConInfoTableLocation
    -> ConInfoTableLocation -> ConInfoTableLocation
    max :: ConInfoTableLocation
    -> ConInfoTableLocation -> ConInfoTableLocation
    $cmin :: ConInfoTableLocation
    -> ConInfoTableLocation -> ConInfoTableLocation
    min :: ConInfoTableLocation
    -> ConInfoTableLocation -> ConInfoTableLocation
    Ord)

    instance Outputable ConInfoTableLocation where
      ppr :: ConInfoTableLocation -> SDoc
    ppr (UsageSite Module
    m Int
    n) = String -> SDoc
    text String
    "Loc(" SDoc -> SDoc -> SDoc
    <> Int -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Int
    n SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "):" SDoc -> SDoc -> SDoc
    <+> Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    m
      ppr ConInfoTableLocation
    DefinitionSite = SDoc
    empty

    getConInfoTableLocation :: IdLabelInfo -> Maybe ConInfoTableLocation
    getConInfoTableLocation :: IdLabelInfo -> Maybe ConInfoTableLocation
    getConInfoTableLocation (ConInfoTable ConInfoTableLocation
    ci) = ConInfoTableLocation -> Maybe ConInfoTableLocation
    forall a. a -> Maybe a
    Just ConInfoTableLocation
    ci
    getConInfoTableLocation IdLabelInfo
    _ = Maybe ConInfoTableLocation
    forall a. Maybe a
    Nothing

    instance Outputable IdLabelInfo where
      ppr :: IdLabelInfo -> SDoc
    ppr IdLabelInfo
    Closure    = String -> SDoc
    text String
    "Closure"
      ppr IdLabelInfo
    InfoTable  = String -> SDoc
    text String
    "InfoTable"
      ppr IdLabelInfo
    Entry      = String -> SDoc
    text String
    "Entry"
      ppr IdLabelInfo
    Slow       = String -> SDoc
    text String
    "Slow"

      ppr IdLabelInfo
    LocalInfoTable  = String -> SDoc
    text String
    "LocalInfoTable"
      ppr IdLabelInfo
    LocalEntry      = String -> SDoc
    text String
    "LocalEntry"

      ppr (ConEntry ConInfoTableLocation
    mn) = String -> SDoc
    text String
    "ConEntry" SDoc -> SDoc -> SDoc
    <+> ConInfoTableLocation -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr ConInfoTableLocation
    mn
      ppr (ConInfoTable ConInfoTableLocation
    mn) = String -> SDoc
    text String
    "ConInfoTable" SDoc -> SDoc -> SDoc
    <+> ConInfoTableLocation -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr ConInfoTableLocation
    mn
      ppr IdLabelInfo
    ClosureTable = String -> SDoc
    text String
    "ClosureTable"
      ppr IdLabelInfo
    Bytes        = String -> SDoc
    text String
    "Bytes"
      ppr IdLabelInfo
    BlockInfoTable  = String -> SDoc
    text String
    "BlockInfoTable"
      ppr (IdTickyInfo TickyIdInfo
    info) = String -> SDoc
    text String
    "IdTickyInfo" SDoc -> SDoc -> SDoc
    <+> TickyIdInfo -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr TickyIdInfo
    info

    data RtsLabelInfo
      = RtsSelectorInfoTable Bool{-updatable-} Int{-offset-}  -- ^ Selector thunks
      | RtsSelectorEntry     Bool{-updatable-} Int{-offset-}

      | RtsApInfoTable       Bool{-updatable-} Int{-arity-}    -- ^ AP thunks
      | RtsApEntry           Bool{-updatable-} Int{-arity-}

      | RtsPrimOp            PrimOp
      | RtsApFast            NonDetFastString    -- ^ _fast versions of generic apply
      | RtsSlowFastTickyCtr String

      deriving (RtsLabelInfo -> RtsLabelInfo -> Bool
    (RtsLabelInfo -> RtsLabelInfo -> Bool)
    -> (RtsLabelInfo -> RtsLabelInfo -> Bool) -> Eq RtsLabelInfo
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: RtsLabelInfo -> RtsLabelInfo -> Bool
    == :: RtsLabelInfo -> RtsLabelInfo -> Bool
    $c/= :: RtsLabelInfo -> RtsLabelInfo -> Bool
    /= :: RtsLabelInfo -> RtsLabelInfo -> Bool
    Eq,Eq RtsLabelInfo
    Eq RtsLabelInfo
    -> (RtsLabelInfo -> RtsLabelInfo -> Ordering)
    -> (RtsLabelInfo -> RtsLabelInfo -> Bool)
    -> (RtsLabelInfo -> RtsLabelInfo -> Bool)
    -> (RtsLabelInfo -> RtsLabelInfo -> Bool)
    -> (RtsLabelInfo -> RtsLabelInfo -> Bool)
    -> (RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo)
    -> (RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo)
    -> Ord RtsLabelInfo
    RtsLabelInfo -> RtsLabelInfo -> Bool
    RtsLabelInfo -> RtsLabelInfo -> Ordering
    RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: RtsLabelInfo -> RtsLabelInfo -> Ordering
    compare :: RtsLabelInfo -> RtsLabelInfo -> Ordering
    $c< :: RtsLabelInfo -> RtsLabelInfo -> Bool
    < :: RtsLabelInfo -> RtsLabelInfo -> Bool
    $c<= :: RtsLabelInfo -> RtsLabelInfo -> Bool
    <= :: RtsLabelInfo -> RtsLabelInfo -> Bool
    $c> :: RtsLabelInfo -> RtsLabelInfo -> Bool
    > :: RtsLabelInfo -> RtsLabelInfo -> Bool
    $c>= :: RtsLabelInfo -> RtsLabelInfo -> Bool
    >= :: RtsLabelInfo -> RtsLabelInfo -> Bool
    $cmax :: RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo
    max :: RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo
    $cmin :: RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo
    min :: RtsLabelInfo -> RtsLabelInfo -> RtsLabelInfo
    Ord)

    -- | What type of Cmm label we're dealing with.
    --      Determines the suffix appended to the name when a CLabel.CmmLabel
    --      is pretty printed.
    data CmmLabelInfo
      = CmmInfo                     -- ^ misc rts info tables,      suffix _info
      | CmmEntry                    -- ^ misc rts entry points,     suffix _entry
      | CmmRetInfo                  -- ^ misc rts ret info tables,  suffix _info
      | CmmRet                      -- ^ misc rts return points,    suffix _ret
      | CmmData                     -- ^ misc rts data bits, eg CHARLIKE_closure
      | CmmCode                     -- ^ misc rts code
      | CmmClosure                  -- ^ closures eg CHARLIKE_closure
      | CmmPrimCall                 -- ^ a prim call to some hand written Cmm code
      deriving (CmmLabelInfo -> CmmLabelInfo -> Bool
    (CmmLabelInfo -> CmmLabelInfo -> Bool)
    -> (CmmLabelInfo -> CmmLabelInfo -> Bool) -> Eq CmmLabelInfo
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: CmmLabelInfo -> CmmLabelInfo -> Bool
    == :: CmmLabelInfo -> CmmLabelInfo -> Bool
    $c/= :: CmmLabelInfo -> CmmLabelInfo -> Bool
    /= :: CmmLabelInfo -> CmmLabelInfo -> Bool
    Eq, Eq CmmLabelInfo
    Eq CmmLabelInfo
    -> (CmmLabelInfo -> CmmLabelInfo -> Ordering)
    -> (CmmLabelInfo -> CmmLabelInfo -> Bool)
    -> (CmmLabelInfo -> CmmLabelInfo -> Bool)
    -> (CmmLabelInfo -> CmmLabelInfo -> Bool)
    -> (CmmLabelInfo -> CmmLabelInfo -> Bool)
    -> (CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo)
    -> (CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo)
    -> Ord CmmLabelInfo
    CmmLabelInfo -> CmmLabelInfo -> Bool
    CmmLabelInfo -> CmmLabelInfo -> Ordering
    CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: CmmLabelInfo -> CmmLabelInfo -> Ordering
    compare :: CmmLabelInfo -> CmmLabelInfo -> Ordering
    $c< :: CmmLabelInfo -> CmmLabelInfo -> Bool
    < :: CmmLabelInfo -> CmmLabelInfo -> Bool
    $c<= :: CmmLabelInfo -> CmmLabelInfo -> Bool
    <= :: CmmLabelInfo -> CmmLabelInfo -> Bool
    $c> :: CmmLabelInfo -> CmmLabelInfo -> Bool
    > :: CmmLabelInfo -> CmmLabelInfo -> Bool
    $c>= :: CmmLabelInfo -> CmmLabelInfo -> Bool
    >= :: CmmLabelInfo -> CmmLabelInfo -> Bool
    $cmax :: CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo
    max :: CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo
    $cmin :: CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo
    min :: CmmLabelInfo -> CmmLabelInfo -> CmmLabelInfo
    Ord)

    data DynamicLinkerLabelInfo
      = CodeStub                    -- MachO: Lfoo$stub, ELF: foo@plt
      | SymbolPtr                   -- MachO: Lfoo$non_lazy_ptr, Windows: __imp_foo
      | GotSymbolPtr                -- ELF: foo@got
      | GotSymbolOffset             -- ELF: foo@gotoff

      deriving (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool)
    -> (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool)
    -> Eq DynamicLinkerLabelInfo
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    == :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    $c/= :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    /= :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    Eq, Eq DynamicLinkerLabelInfo
    Eq DynamicLinkerLabelInfo
    -> (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Ordering)
    -> (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool)
    -> (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool)
    -> (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool)
    -> (DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool)
    -> (DynamicLinkerLabelInfo
        -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo)
    -> (DynamicLinkerLabelInfo
        -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo)
    -> Ord DynamicLinkerLabelInfo
    DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Ordering
    DynamicLinkerLabelInfo
    -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Ordering
    compare :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Ordering
    $c< :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    < :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    $c<= :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    <= :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    $c> :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    > :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    $c>= :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    >= :: DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo -> Bool
    $cmax :: DynamicLinkerLabelInfo
    -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo
    max :: DynamicLinkerLabelInfo
    -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo
    $cmin :: DynamicLinkerLabelInfo
    -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo
    min :: DynamicLinkerLabelInfo
    -> DynamicLinkerLabelInfo -> DynamicLinkerLabelInfo
    Ord)

    -- -----------------------------------------------------------------------------
    -- Constructing CLabels
    -- -----------------------------------------------------------------------------

    -- Constructing IdLabels
    -- These are always local:

    mkSRTLabel     :: Unique -> CLabel
    mkSRTLabel :: Unique -> CLabel
    mkSRTLabel Unique
    u = Unique -> CLabel
    SRTLabel Unique
    u

    -- See Note [ticky for LNE]
    mkRednCountsLabel :: Name -> CLabel
    mkRednCountsLabel :: Name -> CLabel
    mkRednCountsLabel Name
    name = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    NoCafRefs (TickyIdInfo -> IdLabelInfo
    IdTickyInfo TickyIdInfo
    TickyRednCounts)

    mkTagHitLabel :: Name -> Unique -> CLabel
    mkTagHitLabel :: Name -> Unique -> CLabel
    mkTagHitLabel Name
    name !Unique
    uniq = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    NoCafRefs (TickyIdInfo -> IdLabelInfo
    IdTickyInfo (Unique -> TickyIdInfo
    TickyInferedTag Unique
    uniq))

    mkClosureLabel              :: Name -> CafInfo -> CLabel
    mkInfoTableLabel            :: Name -> CafInfo -> CLabel
    mkEntryLabel                :: Name -> CafInfo -> CLabel
    mkClosureTableLabel         :: Name -> CafInfo -> CLabel
    mkConInfoTableLabel         :: Name -> ConInfoTableLocation -> CLabel
    mkBytesLabel                :: Name -> CLabel
    mkClosureLabel :: Name -> CafInfo -> CLabel
    mkClosureLabel Name
    name         CafInfo
    c     = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    c IdLabelInfo
    Closure
    -- | Decicdes between external and local labels based on the names externality.
    mkInfoTableLabel :: Name -> CafInfo -> CLabel
    mkInfoTableLabel Name
    name       CafInfo
    c
      | Name -> Bool
    isExternalName Name
    name = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    c IdLabelInfo
    InfoTable
      | Bool
    otherwise           = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    c IdLabelInfo
    LocalInfoTable
    mkEntryLabel :: Name -> CafInfo -> CLabel
    mkEntryLabel Name
    name           CafInfo
    c     = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    c IdLabelInfo
    Entry
    mkClosureTableLabel :: Name -> CafInfo -> CLabel
    mkClosureTableLabel Name
    name    CafInfo
    c     = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    c IdLabelInfo
    ClosureTable
    -- Special case for the normal 'DefinitionSite' case so that the 'ConInfoTable' application can be floated to a CAF.
    mkConInfoTableLabel :: Name -> ConInfoTableLocation -> CLabel
    mkConInfoTableLabel Name
    name ConInfoTableLocation
    DefinitionSite = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    NoCafRefs (ConInfoTableLocation -> IdLabelInfo
    ConInfoTable ConInfoTableLocation
    DefinitionSite)
    mkConInfoTableLabel Name
    name ConInfoTableLocation
    k = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    NoCafRefs (ConInfoTableLocation -> IdLabelInfo
    ConInfoTable ConInfoTableLocation
    k)
    mkBytesLabel :: Name -> CLabel
    mkBytesLabel Name
    name                 = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    NoCafRefs IdLabelInfo
    Bytes

    mkBlockInfoTableLabel :: Name -> CafInfo -> CLabel
    mkBlockInfoTableLabel :: Name -> CafInfo -> CLabel
    mkBlockInfoTableLabel Name
    name CafInfo
    c = Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    name CafInfo
    c IdLabelInfo
    BlockInfoTable
                                   -- See Note [Proc-point local block entry-points].

    -- Constructing Cmm Labels
    mkDirty_MUT_VAR_Label,
        mkNonmovingWriteBarrierEnabledLabel,
        mkUpdInfoLabel,
        mkBHUpdInfoLabel, mkIndStaticInfoLabel, mkMainCapabilityLabel,
        mkMAP_FROZEN_CLEAN_infoLabel, mkMAP_FROZEN_DIRTY_infoLabel,
        mkMAP_DIRTY_infoLabel,
        mkArrWords_infoLabel,
        mkTopTickyCtrLabel,
        mkCAFBlackHoleInfoTableLabel,
        mkSMAP_FROZEN_CLEAN_infoLabel, mkSMAP_FROZEN_DIRTY_infoLabel,
        mkSMAP_DIRTY_infoLabel, mkBadAlignmentLabel,
        mkOutOfBoundsAccessLabel, mkMUT_VAR_CLEAN_infoLabel :: CLabel
    mkDirty_MUT_VAR_Label :: CLabel
    mkDirty_MUT_VAR_Label           = FastString
    -> Maybe Int -> ForeignLabelSource -> FunctionOrData -> CLabel
    mkForeignLabel (String -> FastString
    fsLit String
    "dirty_MUT_VAR") Maybe Int
    forall a. Maybe a
    Nothing ForeignLabelSource
    ForeignLabelInExternalPackage FunctionOrData
    IsFunction
    mkNonmovingWriteBarrierEnabledLabel :: CLabel
    mkNonmovingWriteBarrierEnabledLabel
                                    = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "nonmoving_write_barrier_enabled") CmmLabelInfo
    CmmData
    mkUpdInfoLabel :: CLabel
    mkUpdInfoLabel                  = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_upd_frame")         CmmLabelInfo
    CmmInfo
    mkBHUpdInfoLabel :: CLabel
    mkBHUpdInfoLabel                = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_bh_upd_frame" )     CmmLabelInfo
    CmmInfo
    mkIndStaticInfoLabel :: CLabel
    mkIndStaticInfoLabel            = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_IND_STATIC")        CmmLabelInfo
    CmmInfo
    mkMainCapabilityLabel :: CLabel
    mkMainCapabilityLabel           = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "MainCapability")        CmmLabelInfo
    CmmData
    mkMAP_FROZEN_CLEAN_infoLabel :: CLabel
    mkMAP_FROZEN_CLEAN_infoLabel    = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_MUT_ARR_PTRS_FROZEN_CLEAN") CmmLabelInfo
    CmmInfo
    mkMAP_FROZEN_DIRTY_infoLabel :: CLabel
    mkMAP_FROZEN_DIRTY_infoLabel    = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_MUT_ARR_PTRS_FROZEN_DIRTY") CmmLabelInfo
    CmmInfo
    mkMAP_DIRTY_infoLabel :: CLabel
    mkMAP_DIRTY_infoLabel           = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_MUT_ARR_PTRS_DIRTY") CmmLabelInfo
    CmmInfo
    mkTopTickyCtrLabel :: CLabel
    mkTopTickyCtrLabel              = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "top_ct")                CmmLabelInfo
    CmmData
    mkCAFBlackHoleInfoTableLabel :: CLabel
    mkCAFBlackHoleInfoTableLabel    = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_CAF_BLACKHOLE")     CmmLabelInfo
    CmmInfo
    mkArrWords_infoLabel :: CLabel
    mkArrWords_infoLabel            = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_ARR_WORDS")         CmmLabelInfo
    CmmInfo
    mkSMAP_FROZEN_CLEAN_infoLabel :: CLabel
    mkSMAP_FROZEN_CLEAN_infoLabel   = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_SMALL_MUT_ARR_PTRS_FROZEN_CLEAN") CmmLabelInfo
    CmmInfo
    mkSMAP_FROZEN_DIRTY_infoLabel :: CLabel
    mkSMAP_FROZEN_DIRTY_infoLabel   = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_SMALL_MUT_ARR_PTRS_FROZEN_DIRTY") CmmLabelInfo
    CmmInfo
    mkSMAP_DIRTY_infoLabel :: CLabel
    mkSMAP_DIRTY_infoLabel          = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_SMALL_MUT_ARR_PTRS_DIRTY") CmmLabelInfo
    CmmInfo
    mkBadAlignmentLabel :: CLabel
    mkBadAlignmentLabel             = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_badAlignment")      CmmLabelInfo
    CmmEntry
    mkOutOfBoundsAccessLabel :: CLabel
    mkOutOfBoundsAccessLabel        = FastString
    -> Maybe Int -> ForeignLabelSource -> FunctionOrData -> CLabel
    mkForeignLabel (String -> FastString
    fsLit String
    "rtsOutOfBoundsAccess") Maybe Int
    forall a. Maybe a
    Nothing ForeignLabelSource
    ForeignLabelInExternalPackage FunctionOrData
    IsFunction
    mkMUT_VAR_CLEAN_infoLabel :: CLabel
    mkMUT_VAR_CLEAN_infoLabel       = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) (String -> FastString
    fsLit String
    "stg_MUT_VAR_CLEAN")     CmmLabelInfo
    CmmInfo

    mkSRTInfoLabel :: Int -> CLabel
    mkSRTInfoLabel :: Int -> CLabel
    mkSRTInfoLabel Int
    n = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False) FastString
    lbl CmmLabelInfo
    CmmInfo
     where
       lbl :: FastString
    lbl =
         case Int
    n of
           Int
    1 -> String -> FastString
    fsLit String
    "stg_SRT_1"
           Int
    2 -> String -> FastString
    fsLit String
    "stg_SRT_2"
           Int
    3 -> String -> FastString
    fsLit String
    "stg_SRT_3"
           Int
    4 -> String -> FastString
    fsLit String
    "stg_SRT_4"
           Int
    5 -> String -> FastString
    fsLit String
    "stg_SRT_5"
           Int
    6 -> String -> FastString
    fsLit String
    "stg_SRT_6"
           Int
    7 -> String -> FastString
    fsLit String
    "stg_SRT_7"
           Int
    8 -> String -> FastString
    fsLit String
    "stg_SRT_8"
           Int
    9 -> String -> FastString
    fsLit String
    "stg_SRT_9"
           Int
    10 -> String -> FastString
    fsLit String
    "stg_SRT_10"
           Int
    11 -> String -> FastString
    fsLit String
    "stg_SRT_11"
           Int
    12 -> String -> FastString
    fsLit String
    "stg_SRT_12"
           Int
    13 -> String -> FastString
    fsLit String
    "stg_SRT_13"
           Int
    14 -> String -> FastString
    fsLit String
    "stg_SRT_14"
           Int
    15 -> String -> FastString
    fsLit String
    "stg_SRT_15"
           Int
    16 -> String -> FastString
    fsLit String
    "stg_SRT_16"
           Int
    _ -> String -> FastString
    forall a. String -> a
    panic String
    "mkSRTInfoLabel"

    -----
    mkCmmInfoLabel,   mkCmmEntryLabel, mkCmmRetInfoLabel, mkCmmRetLabel,
      mkCmmCodeLabel, mkCmmClosureLabel
            :: UnitId -> FastString -> CLabel

    mkCmmDataLabel    :: UnitId -> NeedExternDecl -> FastString -> CLabel
    mkRtsCmmDataLabel :: FastString -> CLabel

    mkCmmInfoLabel :: UnitId -> FastString -> CLabel
    mkCmmInfoLabel       UnitId
    pkg FastString
    str     = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmInfo
    mkCmmEntryLabel :: UnitId -> FastString -> CLabel
    mkCmmEntryLabel      UnitId
    pkg FastString
    str     = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmEntry
    mkCmmRetInfoLabel :: UnitId -> FastString -> CLabel
    mkCmmRetInfoLabel    UnitId
    pkg FastString
    str     = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmRetInfo
    mkCmmRetLabel :: UnitId -> FastString -> CLabel
    mkCmmRetLabel        UnitId
    pkg FastString
    str     = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmRet
    mkCmmCodeLabel :: UnitId -> FastString -> CLabel
    mkCmmCodeLabel       UnitId
    pkg FastString
    str     = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmCode
    mkCmmClosureLabel :: UnitId -> FastString -> CLabel
    mkCmmClosureLabel    UnitId
    pkg FastString
    str     = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmClosure
    mkCmmDataLabel :: UnitId -> NeedExternDecl -> FastString -> CLabel
    mkCmmDataLabel       UnitId
    pkg NeedExternDecl
    ext FastString
    str = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    pkg NeedExternDecl
    ext  FastString
    str CmmLabelInfo
    CmmData
    mkRtsCmmDataLabel :: FastString -> CLabel
    mkRtsCmmDataLabel    FastString
    str         = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    rtsUnitId (Bool -> NeedExternDecl
    NeedExternDecl Bool
    False)  FastString
    str CmmLabelInfo
    CmmData
                                        -- RTS symbols don't need "GHC.CmmToC" to
                                        -- generate \"extern\" declaration (they are
                                        -- exposed via rts/include/Stg.h)

    mkLocalBlockLabel :: Unique -> CLabel
    mkLocalBlockLabel :: Unique -> CLabel
    mkLocalBlockLabel Unique
    u = Unique -> CLabel
    LocalBlockLabel Unique
    u

    -- Constructing RtsLabels
    mkRtsPrimOpLabel :: PrimOp -> CLabel
    mkRtsPrimOpLabel :: PrimOp -> CLabel
    mkRtsPrimOpLabel PrimOp
    primop = RtsLabelInfo -> CLabel
    RtsLabel (PrimOp -> RtsLabelInfo
    RtsPrimOp PrimOp
    primop)

    mkSelectorInfoLabel :: Platform -> Bool -> Int -> CLabel
    mkSelectorInfoLabel :: Platform -> Bool -> Int -> CLabel
    mkSelectorInfoLabel Platform
    platform Bool
    upd Int
    offset =
       Bool -> CLabel -> CLabel
    forall a. HasCallStack => Bool -> a -> a
    assert (Int
    offset Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    >= Int
    0 Bool -> Bool -> Bool
    && Int
    offset Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    <= PlatformConstants -> Int
    pc_MAX_SPEC_SELECTEE_SIZE (Platform -> PlatformConstants
    platformConstants Platform
    platform)) (CLabel -> CLabel) -> CLabel -> CLabel
    forall a b. (a -> b) -> a -> b
    $
       RtsLabelInfo -> CLabel
    RtsLabel (Bool -> Int -> RtsLabelInfo
    RtsSelectorInfoTable Bool
    upd Int
    offset)

    mkSelectorEntryLabel :: Platform -> Bool -> Int -> CLabel
    mkSelectorEntryLabel :: Platform -> Bool -> Int -> CLabel
    mkSelectorEntryLabel Platform
    platform Bool
    upd Int
    offset =
       Bool -> CLabel -> CLabel
    forall a. HasCallStack => Bool -> a -> a
    assert (Int
    offset Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    >= Int
    0 Bool -> Bool -> Bool
    && Int
    offset Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    <= PlatformConstants -> Int
    pc_MAX_SPEC_SELECTEE_SIZE (Platform -> PlatformConstants
    platformConstants Platform
    platform)) (CLabel -> CLabel) -> CLabel -> CLabel
    forall a b. (a -> b) -> a -> b
    $
       RtsLabelInfo -> CLabel
    RtsLabel (Bool -> Int -> RtsLabelInfo
    RtsSelectorEntry Bool
    upd Int
    offset)

    mkApInfoTableLabel :: Platform -> Bool -> Int -> CLabel
    mkApInfoTableLabel :: Platform -> Bool -> Int -> CLabel
    mkApInfoTableLabel Platform
    platform Bool
    upd Int
    arity =
       Bool -> CLabel -> CLabel
    forall a. HasCallStack => Bool -> a -> a
    assert (Int
    arity Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    > Int
    0 Bool -> Bool -> Bool
    && Int
    arity Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    <= PlatformConstants -> Int
    pc_MAX_SPEC_AP_SIZE (Platform -> PlatformConstants
    platformConstants Platform
    platform)) (CLabel -> CLabel) -> CLabel -> CLabel
    forall a b. (a -> b) -> a -> b
    $
       RtsLabelInfo -> CLabel
    RtsLabel (Bool -> Int -> RtsLabelInfo
    RtsApInfoTable Bool
    upd Int
    arity)

    mkApEntryLabel :: Platform -> Bool -> Int -> CLabel
    mkApEntryLabel :: Platform -> Bool -> Int -> CLabel
    mkApEntryLabel Platform
    platform Bool
    upd Int
    arity =
       Bool -> CLabel -> CLabel
    forall a. HasCallStack => Bool -> a -> a
    assert (Int
    arity Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    > Int
    0 Bool -> Bool -> Bool
    && Int
    arity Int -> Int -> Bool
    forall a. Ord a => a -> a -> Bool
    <= PlatformConstants -> Int
    pc_MAX_SPEC_AP_SIZE (Platform -> PlatformConstants
    platformConstants Platform
    platform)) (CLabel -> CLabel) -> CLabel -> CLabel
    forall a b. (a -> b) -> a -> b
    $
       RtsLabelInfo -> CLabel
    RtsLabel (Bool -> Int -> RtsLabelInfo
    RtsApEntry Bool
    upd Int
    arity)

    -- A call to some primitive hand written Cmm code
    mkPrimCallLabel :: PrimCall -> CLabel
    mkPrimCallLabel :: PrimCall -> CLabel
    mkPrimCallLabel (PrimCall FastString
    str GenUnit UnitId
    pkg)
            = UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel (GenUnit UnitId -> UnitId
    toUnitId GenUnit UnitId
    pkg) (Bool -> NeedExternDecl
    NeedExternDecl Bool
    True) FastString
    str CmmLabelInfo
    CmmPrimCall

    -- Constructing ForeignLabels

    -- | Make a foreign label
    mkForeignLabel
            :: FastString           -- name
            -> Maybe Int            -- size prefix
            -> ForeignLabelSource   -- what package it's in
            -> FunctionOrData
            -> CLabel

    mkForeignLabel :: FastString
    -> Maybe Int -> ForeignLabelSource -> FunctionOrData -> CLabel
    mkForeignLabel = FastString
    -> Maybe Int -> ForeignLabelSource -> FunctionOrData -> CLabel
    ForeignLabel

    -- | Update the label size field in a ForeignLabel
    addLabelSize :: CLabel -> Int -> CLabel
    addLabelSize :: CLabel -> Int -> CLabel
    addLabelSize (ForeignLabel FastString
    str Maybe Int
    _ ForeignLabelSource
    src  FunctionOrData
    fod) Int
    sz
        = FastString
    -> Maybe Int -> ForeignLabelSource -> FunctionOrData -> CLabel
    ForeignLabel FastString
    str (Int -> Maybe Int
    forall a. a -> Maybe a
    Just Int
    sz) ForeignLabelSource
    src FunctionOrData
    fod
    addLabelSize CLabel
    label Int
    _
        = CLabel
    label

    -- | Whether label is a top-level string literal
    isBytesLabel :: CLabel -> Bool
    isBytesLabel :: CLabel -> Bool
    isBytesLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    Bytes) = Bool
    True
    isBytesLabel CLabel
    _lbl = Bool
    False

    -- | Whether label is a non-haskell label (defined in C code)
    isForeignLabel :: CLabel -> Bool
    isForeignLabel :: CLabel -> Bool
    isForeignLabel (ForeignLabel FastString
    _ Maybe Int
    _ ForeignLabelSource
    _ FunctionOrData
    _) = Bool
    True
    isForeignLabel CLabel
    _lbl = Bool
    False

    -- | Whether label is a static closure label (can come from haskell or cmm)
    isStaticClosureLabel :: CLabel -> Bool
    -- Closure defined in haskell (.hs)
    isStaticClosureLabel :: CLabel -> Bool
    isStaticClosureLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    Closure) = Bool
    True
    -- Closure defined in cmm
    isStaticClosureLabel (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmClosure) = Bool
    True
    isStaticClosureLabel CLabel
    _lbl = Bool
    False

    -- | Whether label is a .rodata label
    isSomeRODataLabel :: CLabel -> Bool
    -- info table defined in haskell (.hs)
    isSomeRODataLabel :: CLabel -> Bool
    isSomeRODataLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    ClosureTable) = Bool
    True
    isSomeRODataLabel (IdLabel Name
    _ CafInfo
    _ ConInfoTable {}) = Bool
    True
    isSomeRODataLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    InfoTable) = Bool
    True
    isSomeRODataLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    LocalInfoTable) = Bool
    True
    isSomeRODataLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    BlockInfoTable) = Bool
    True
    -- info table defined in cmm (.cmm)
    isSomeRODataLabel (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmInfo) = Bool
    True
    isSomeRODataLabel CLabel
    _lbl = Bool
    False

    -- | Whether label is points to some kind of info table
    isInfoTableLabel :: CLabel -> Bool
    isInfoTableLabel :: CLabel -> Bool
    isInfoTableLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    InfoTable)      = Bool
    True
    isInfoTableLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    LocalInfoTable) = Bool
    True
    isInfoTableLabel (IdLabel Name
    _ CafInfo
    _ ConInfoTable {})   = Bool
    True
    isInfoTableLabel (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    BlockInfoTable) = Bool
    True
    isInfoTableLabel CLabel
    _                            = Bool
    False

    -- | Whether label is points to constructor info table
    isConInfoTableLabel :: CLabel -> Bool
    isConInfoTableLabel :: CLabel -> Bool
    isConInfoTableLabel (IdLabel Name
    _ CafInfo
    _ ConInfoTable {})   = Bool
    True
    isConInfoTableLabel CLabel
    _                            = Bool
    False

    -- | Get the label size field from a ForeignLabel
    foreignLabelStdcallInfo :: CLabel -> Maybe Int
    foreignLabelStdcallInfo :: CLabel -> Maybe Int
    foreignLabelStdcallInfo (ForeignLabel FastString
    _ Maybe Int
    info ForeignLabelSource
    _ FunctionOrData
    _) = Maybe Int
    info
    foreignLabelStdcallInfo CLabel
    _lbl = Maybe Int
    forall a. Maybe a
    Nothing

    -- Constructing Large*Labels
    mkBitmapLabel   :: Unique -> CLabel
    mkBitmapLabel :: Unique -> CLabel
    mkBitmapLabel   Unique
    uniq            = Unique -> CLabel
    LargeBitmapLabel Unique
    uniq

    -- | Info Table Provenance Entry
    -- See Note [Mapping Info Tables to Source Positions]
    data InfoProvEnt = InfoProvEnt
                                   { InfoProvEnt -> CLabel
    infoTablePtr :: !CLabel
                                   -- Address of the info table
                                   , InfoProvEnt -> Int
    infoProvEntClosureType :: !Int
                                   -- The closure type of the info table (from ClosureMacros.h)
                                   , InfoProvEnt -> String
    infoTableType :: !String
                                   -- The rendered Haskell type of the closure the table represents
                                   , InfoProvEnt -> Module
    infoProvModule :: !Module
                                   -- Origin module
                                   , InfoProvEnt -> Maybe (RealSrcSpan, String)
    infoTableProv :: !(Maybe (RealSrcSpan, String)) }
                                   -- Position and information about the info table
                                   deriving (InfoProvEnt -> InfoProvEnt -> Bool
    (InfoProvEnt -> InfoProvEnt -> Bool)
    -> (InfoProvEnt -> InfoProvEnt -> Bool) -> Eq InfoProvEnt
    forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
    $c== :: InfoProvEnt -> InfoProvEnt -> Bool
    == :: InfoProvEnt -> InfoProvEnt -> Bool
    $c/= :: InfoProvEnt -> InfoProvEnt -> Bool
    /= :: InfoProvEnt -> InfoProvEnt -> Bool
    Eq, Eq InfoProvEnt
    Eq InfoProvEnt
    -> (InfoProvEnt -> InfoProvEnt -> Ordering)
    -> (InfoProvEnt -> InfoProvEnt -> Bool)
    -> (InfoProvEnt -> InfoProvEnt -> Bool)
    -> (InfoProvEnt -> InfoProvEnt -> Bool)
    -> (InfoProvEnt -> InfoProvEnt -> Bool)
    -> (InfoProvEnt -> InfoProvEnt -> InfoProvEnt)
    -> (InfoProvEnt -> InfoProvEnt -> InfoProvEnt)
    -> Ord InfoProvEnt
    InfoProvEnt -> InfoProvEnt -> Bool
    InfoProvEnt -> InfoProvEnt -> Ordering
    InfoProvEnt -> InfoProvEnt -> InfoProvEnt
    forall a.
    Eq a
    -> (a -> a -> Ordering)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> Bool)
    -> (a -> a -> a)
    -> (a -> a -> a)
    -> Ord a
    $ccompare :: InfoProvEnt -> InfoProvEnt -> Ordering
    compare :: InfoProvEnt -> InfoProvEnt -> Ordering
    $c< :: InfoProvEnt -> InfoProvEnt -> Bool
    < :: InfoProvEnt -> InfoProvEnt -> Bool
    $c<= :: InfoProvEnt -> InfoProvEnt -> Bool
    <= :: InfoProvEnt -> InfoProvEnt -> Bool
    $c> :: InfoProvEnt -> InfoProvEnt -> Bool
    > :: InfoProvEnt -> InfoProvEnt -> Bool
    $c>= :: InfoProvEnt -> InfoProvEnt -> Bool
    >= :: InfoProvEnt -> InfoProvEnt -> Bool
    $cmax :: InfoProvEnt -> InfoProvEnt -> InfoProvEnt
    max :: InfoProvEnt -> InfoProvEnt -> InfoProvEnt
    $cmin :: InfoProvEnt -> InfoProvEnt -> InfoProvEnt
    min :: InfoProvEnt -> InfoProvEnt -> InfoProvEnt
    Ord)

    -- Constructing Cost Center Labels
    mkCCLabel  :: CostCentre      -> CLabel
    mkCCSLabel :: CostCentreStack -> CLabel
    mkIPELabel :: InfoProvEnt -> CLabel
    mkCCLabel :: CostCentre -> CLabel
    mkCCLabel           CostCentre
    cc          = CostCentre -> CLabel
    CC_Label CostCentre
    cc
    mkCCSLabel :: CostCentreStack -> CLabel
    mkCCSLabel          CostCentreStack
    ccs         = CostCentreStack -> CLabel
    CCS_Label CostCentreStack
    ccs
    mkIPELabel :: InfoProvEnt -> CLabel
    mkIPELabel          InfoProvEnt
    ipe         = InfoProvEnt -> CLabel
    IPE_Label InfoProvEnt
    ipe

    mkRtsApFastLabel :: FastString -> CLabel
    mkRtsApFastLabel :: FastString -> CLabel
    mkRtsApFastLabel FastString
    str = RtsLabelInfo -> CLabel
    RtsLabel (NonDetFastString -> RtsLabelInfo
    RtsApFast (FastString -> NonDetFastString
    NonDetFastString FastString
    str))

    mkRtsSlowFastTickyCtrLabel :: String -> CLabel
    mkRtsSlowFastTickyCtrLabel :: String -> CLabel
    mkRtsSlowFastTickyCtrLabel String
    pat = RtsLabelInfo -> CLabel
    RtsLabel (String -> RtsLabelInfo
    RtsSlowFastTickyCtr String
    pat)

    -- Constructing Code Coverage Labels
    mkHpcTicksLabel :: Module -> CLabel
    mkHpcTicksLabel :: Module -> CLabel
    mkHpcTicksLabel                = Module -> CLabel
    HpcTicksLabel

    -- Constructing labels used for dynamic linking
    mkDynamicLinkerLabel :: DynamicLinkerLabelInfo -> CLabel -> CLabel
    mkDynamicLinkerLabel :: DynamicLinkerLabelInfo -> CLabel -> CLabel
    mkDynamicLinkerLabel            = DynamicLinkerLabelInfo -> CLabel -> CLabel
    DynamicLinkerLabel

    dynamicLinkerLabelInfo :: CLabel -> Maybe (DynamicLinkerLabelInfo, CLabel)
    dynamicLinkerLabelInfo :: CLabel -> Maybe (DynamicLinkerLabelInfo, CLabel)
    dynamicLinkerLabelInfo (DynamicLinkerLabel DynamicLinkerLabelInfo
    info CLabel
    lbl) = (DynamicLinkerLabelInfo, CLabel)
    -> Maybe (DynamicLinkerLabelInfo, CLabel)
    forall a. a -> Maybe a
    Just (DynamicLinkerLabelInfo
    info, CLabel
    lbl)
    dynamicLinkerLabelInfo CLabel
    _        = Maybe (DynamicLinkerLabelInfo, CLabel)
    forall a. Maybe a
    Nothing

    mkPicBaseLabel :: CLabel
    mkPicBaseLabel :: CLabel
    mkPicBaseLabel                  = CLabel
    PicBaseLabel

    -- Constructing miscellaneous other labels
    mkDeadStripPreventer :: CLabel -> CLabel
    mkDeadStripPreventer :: CLabel -> CLabel
    mkDeadStripPreventer CLabel
    lbl        = CLabel -> CLabel
    DeadStripPreventer CLabel
    lbl

    mkStringLitLabel :: Unique -> CLabel
    mkStringLitLabel :: Unique -> CLabel
    mkStringLitLabel                = Unique -> CLabel
    StringLitLabel

    mkInitializerStubLabel :: Module -> String -> CLabel
    mkInitializerStubLabel :: Module -> String -> CLabel
    mkInitializerStubLabel Module
    mod String
    s    = Module -> ModuleLabelKind -> CLabel
    ModuleLabel Module
    mod (String -> ModuleLabelKind
    MLK_Initializer String
    s)

    mkInitializerArrayLabel :: Module -> CLabel
    mkInitializerArrayLabel :: Module -> CLabel
    mkInitializerArrayLabel Module
    mod     = Module -> ModuleLabelKind -> CLabel
    ModuleLabel Module
    mod ModuleLabelKind
    MLK_InitializerArray

    mkFinalizerStubLabel :: Module -> String -> CLabel
    mkFinalizerStubLabel :: Module -> String -> CLabel
    mkFinalizerStubLabel Module
    mod String
    s      = Module -> ModuleLabelKind -> CLabel
    ModuleLabel Module
    mod (String -> ModuleLabelKind
    MLK_Finalizer String
    s)

    mkFinalizerArrayLabel :: Module -> CLabel
    mkFinalizerArrayLabel :: Module -> CLabel
    mkFinalizerArrayLabel Module
    mod       = Module -> ModuleLabelKind -> CLabel
    ModuleLabel Module
    mod ModuleLabelKind
    MLK_FinalizerArray

    mkAsmTempLabel :: Uniquable a => a -> CLabel
    mkAsmTempLabel :: forall a. Uniquable a => a -> CLabel
    mkAsmTempLabel a
    a                = Unique -> CLabel
    AsmTempLabel (a -> Unique
    forall a. Uniquable a => a -> Unique
    getUnique a
    a)

    mkAsmTempDerivedLabel :: CLabel -> FastString -> CLabel
    mkAsmTempDerivedLabel :: CLabel -> FastString -> CLabel
    mkAsmTempDerivedLabel = CLabel -> FastString -> CLabel
    AsmTempDerivedLabel

    mkAsmTempEndLabel :: CLabel -> CLabel
    mkAsmTempEndLabel :: CLabel -> CLabel
    mkAsmTempEndLabel CLabel
    l = CLabel -> FastString -> CLabel
    mkAsmTempDerivedLabel CLabel
    l (String -> FastString
    fsLit String
    "_end")

    -- | A label indicating the end of a procedure.
    mkAsmTempProcEndLabel :: CLabel -> CLabel
    mkAsmTempProcEndLabel :: CLabel -> CLabel
    mkAsmTempProcEndLabel CLabel
    l = CLabel -> FastString -> CLabel
    mkAsmTempDerivedLabel CLabel
    l (String -> FastString
    fsLit String
    "_proc_end")

    -- | Construct a label for a DWARF Debug Information Entity (DIE)
    -- describing another symbol.
    mkAsmTempDieLabel :: CLabel -> CLabel
    mkAsmTempDieLabel :: CLabel -> CLabel
    mkAsmTempDieLabel CLabel
    l = CLabel -> FastString -> CLabel
    mkAsmTempDerivedLabel CLabel
    l (String -> FastString
    fsLit String
    "_die")

    -- -----------------------------------------------------------------------------
    -- Convert between different kinds of label

    toClosureLbl :: Platform -> CLabel -> CLabel
    toClosureLbl :: Platform -> CLabel -> CLabel
    toClosureLbl Platform
    platform CLabel
    lbl = case CLabel
    lbl of
       IdLabel Name
    n CafInfo
    c IdLabelInfo
    _        -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c IdLabelInfo
    Closure
       CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    _ -> UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmClosure
       CLabel
    _                    -> String -> SDoc -> CLabel
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "toClosureLbl" (Platform -> CLabel -> SDoc
    pprDebugCLabel Platform
    platform CLabel
    lbl)

    toSlowEntryLbl :: Platform -> CLabel -> CLabel
    toSlowEntryLbl :: Platform -> CLabel -> CLabel
    toSlowEntryLbl Platform
    platform CLabel
    lbl = case CLabel
    lbl of
       IdLabel Name
    n CafInfo
    _ IdLabelInfo
    BlockInfoTable -> String -> SDoc -> CLabel
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "toSlowEntryLbl" (Name -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Name
    n)
       IdLabel Name
    n CafInfo
    c IdLabelInfo
    _              -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c IdLabelInfo
    Slow
       CLabel
    _                          -> String -> SDoc -> CLabel
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "toSlowEntryLbl" (Platform -> CLabel -> SDoc
    pprDebugCLabel Platform
    platform CLabel
    lbl)

    toEntryLbl :: Platform -> CLabel -> CLabel
    toEntryLbl :: Platform -> CLabel -> CLabel
    toEntryLbl Platform
    platform CLabel
    lbl = case CLabel
    lbl of
       IdLabel Name
    n CafInfo
    c IdLabelInfo
    LocalInfoTable    -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c IdLabelInfo
    LocalEntry
       IdLabel Name
    n CafInfo
    c (ConInfoTable ConInfoTableLocation
    k)  -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c (ConInfoTableLocation -> IdLabelInfo
    ConEntry ConInfoTableLocation
    k)

       IdLabel Name
    n CafInfo
    _ IdLabelInfo
    BlockInfoTable    -> Unique -> CLabel
    mkLocalBlockLabel (Name -> Unique
    nameUnique Name
    n)
                       -- See Note [Proc-point local block entry-points].
       IdLabel Name
    n CafInfo
    c IdLabelInfo
    _                 -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c IdLabelInfo
    Entry
       CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmInfo    -> UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmEntry
       CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmRetInfo -> UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmRet
       CLabel
    _                             -> String -> SDoc -> CLabel
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "toEntryLbl" (Platform -> CLabel -> SDoc
    pprDebugCLabel Platform
    platform CLabel
    lbl)

    toInfoLbl :: Platform -> CLabel -> CLabel
    toInfoLbl :: Platform -> CLabel -> CLabel
    toInfoLbl Platform
    platform CLabel
    lbl = case CLabel
    lbl of
       IdLabel Name
    n CafInfo
    c IdLabelInfo
    LocalEntry      -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c IdLabelInfo
    LocalInfoTable
       IdLabel Name
    n CafInfo
    c (ConEntry ConInfoTableLocation
    k)    -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c (ConInfoTableLocation -> IdLabelInfo
    ConInfoTable ConInfoTableLocation
    k)

       IdLabel Name
    n CafInfo
    c IdLabelInfo
    _               -> Name -> CafInfo -> IdLabelInfo -> CLabel
    IdLabel Name
    n CafInfo
    c IdLabelInfo
    InfoTable
       CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmEntry -> UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmInfo
       CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmRet   -> UnitId -> NeedExternDecl -> FastString -> CmmLabelInfo -> CLabel
    CmmLabel UnitId
    m NeedExternDecl
    ext FastString
    str CmmLabelInfo
    CmmRetInfo
       CLabel
    _                           -> String -> SDoc -> CLabel
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "CLabel.toInfoLbl" (Platform -> CLabel -> SDoc
    pprDebugCLabel Platform
    platform CLabel
    lbl)

    hasHaskellName :: CLabel -> Maybe Name
    hasHaskellName :: CLabel -> Maybe Name
    hasHaskellName (IdLabel Name
    n CafInfo
    _ IdLabelInfo
    _) = Name -> Maybe Name
    forall a. a -> Maybe a
    Just Name
    n
    hasHaskellName CLabel
    _               = Maybe Name
    forall a. Maybe a
    Nothing

    hasIdLabelInfo :: CLabel -> Maybe IdLabelInfo
    hasIdLabelInfo :: CLabel -> Maybe IdLabelInfo
    hasIdLabelInfo (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    l) = IdLabelInfo -> Maybe IdLabelInfo
    forall a. a -> Maybe a
    Just IdLabelInfo
    l
    hasIdLabelInfo CLabel
    _ = Maybe IdLabelInfo
    forall a. Maybe a
    Nothing

    -- -----------------------------------------------------------------------------
    -- Does a CLabel's referent itself refer to a CAF?
    hasCAF :: CLabel -> Bool
    hasCAF :: CLabel -> Bool
    hasCAF (IdLabel Name
    _ CafInfo
    _ (IdTickyInfo TickyIdInfo
    TickyRednCounts)) = Bool
    False -- See Note [ticky for LNE]
    hasCAF (IdLabel Name
    _ CafInfo
    MayHaveCafRefs IdLabelInfo
    _) = Bool
    True
    hasCAF CLabel
    _                            = Bool
    False

    -- Note [ticky for LNE]
    -- ~~~~~~~~~~~~~~~~~~~~~
    -- Until 14 Feb 2013, every ticky counter was associated with a
    -- closure. Thus, ticky labels used IdLabel. It is odd that
    -- GHC.Cmm.Info.Build.cafTransfers would consider such a ticky label
    -- reason to add the name to the CAFEnv (and thus eventually the SRT),
    -- but it was harmless because the ticky was only used if the closure
    -- was also.
    --
    -- Since we now have ticky counters for LNEs, it is no longer the case
    -- that every ticky counter has an actual closure. So I changed the
    -- generation of ticky counters' CLabels to not result in their
    -- associated id ending up in the SRT.
    --
    -- NB IdLabel is still appropriate for ticky ids (as opposed to
    -- CmmLabel) because the LNE's counter is still related to an .hs Id,
    -- that Id just isn't for a proper closure.

    -- -----------------------------------------------------------------------------
    -- Does a CLabel need declaring before use or not?
    --
    -- See wiki:commentary/compiler/backends/ppr-c#prototypes

    needsCDecl :: CLabel -> Bool
      -- False <=> it's pre-declared; don't bother
      -- don't bother declaring Bitmap labels, we always make sure
      -- they are defined before use.
    needsCDecl :: CLabel -> Bool
    needsCDecl (SRTLabel Unique
    _)                 = Bool
    True
    needsCDecl (LargeBitmapLabel Unique
    _)         = Bool
    False
    needsCDecl (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    _)              = Bool
    True
    needsCDecl (LocalBlockLabel Unique
    _)          = Bool
    True

    needsCDecl (StringLitLabel Unique
    _)           = Bool
    False
    needsCDecl (AsmTempLabel Unique
    _)             = Bool
    False
    needsCDecl (AsmTempDerivedLabel CLabel
    _ FastString
    _)    = Bool
    False
    needsCDecl (RtsLabel RtsLabelInfo
    _)                 = Bool
    False

    needsCDecl (CmmLabel UnitId
    pkgId (NeedExternDecl Bool
    external) FastString
    _ CmmLabelInfo
    _)
            -- local labels mustn't have it
            | Bool -> Bool
    not Bool
    external                  = Bool
    False

            -- Prototypes for labels defined in the runtime system are imported
            --      into HC files via rts/include/Stg.h.
            | UnitId
    pkgId UnitId -> UnitId -> Bool
    forall a. Eq a => a -> a -> Bool
    == UnitId
    rtsUnitId            = Bool
    False

            -- For other labels we inline one into the HC file directly.
            | Bool
    otherwise                     = Bool
    True

    needsCDecl l :: CLabel
    l@(ForeignLabel{})           = Bool -> Bool
    not (CLabel -> Bool
    isMathFun CLabel
    l)
    needsCDecl (CC_Label CostCentre
    _)                 = Bool
    True
    needsCDecl (CCS_Label CostCentreStack
    _)                = Bool
    True
    needsCDecl (IPE_Label {})               = Bool
    True
    needsCDecl (ModuleLabel Module
    _ ModuleLabelKind
    kind)         = ModuleLabelKind -> Bool
    modLabelNeedsCDecl ModuleLabelKind
    kind
    needsCDecl (HpcTicksLabel Module
    _)            = Bool
    True
    needsCDecl (DynamicLinkerLabel {})      = String -> Bool
    forall a. String -> a
    panic String
    "needsCDecl DynamicLinkerLabel"
    needsCDecl CLabel
    PicBaseLabel                 = String -> Bool
    forall a. String -> a
    panic String
    "needsCDecl PicBaseLabel"
    needsCDecl (DeadStripPreventer {})      = String -> Bool
    forall a. String -> a
    panic String
    "needsCDecl DeadStripPreventer"

    modLabelNeedsCDecl :: ModuleLabelKind -> Bool
    -- Code for finalizers and initializers are emitted in stub objects
    modLabelNeedsCDecl :: ModuleLabelKind -> Bool
    modLabelNeedsCDecl (MLK_Initializer String
    _)  = Bool
    True
    modLabelNeedsCDecl (MLK_Finalizer   String
    _)  = Bool
    True
    -- The finalizer and initializer arrays are emitted in the code of the module
    modLabelNeedsCDecl ModuleLabelKind
    MLK_InitializerArray = Bool
    False
    modLabelNeedsCDecl ModuleLabelKind
    MLK_FinalizerArray   = Bool
    False

    -- | If a label is a local block label then return just its 'BlockId', otherwise
    -- 'Nothing'.
    maybeLocalBlockLabel :: CLabel -> Maybe BlockId
    maybeLocalBlockLabel :: CLabel -> Maybe BlockId
    maybeLocalBlockLabel (LocalBlockLabel Unique
    uq)  = BlockId -> Maybe BlockId
    forall a. a -> Maybe a
    Just (BlockId -> Maybe BlockId) -> BlockId -> Maybe BlockId
    forall a b. (a -> b) -> a -> b
    $ Unique -> BlockId
    mkBlockId Unique
    uq
    maybeLocalBlockLabel CLabel
    _                     = Maybe BlockId
    forall a. Maybe a
    Nothing

    -- | Check whether a label corresponds to a C function that has
    --      a prototype in a system header somewhere, or is built-in
    --      to the C compiler. For these labels we avoid generating our
    --      own C prototypes.
    isMathFun :: CLabel -> Bool
    isMathFun :: CLabel -> Bool
    isMathFun (ForeignLabel FastString
    fs Maybe Int
    _ ForeignLabelSource
    _ FunctionOrData
    _)       = FastString
    fs FastString -> UniqSet FastString -> Bool
    forall a. Uniquable a => a -> UniqSet a -> Bool
    `elementOfUniqSet` UniqSet FastString
    math_funs
    isMathFun CLabel
    _ = Bool
    False

    math_funs :: UniqSet FastString
    math_funs :: UniqSet FastString
    math_funs = [FastString] -> UniqSet FastString
    forall a. Uniquable a => [a] -> UniqSet a
    mkUniqSet [
            -- _ISOC99_SOURCE
            (String -> FastString
    fsLit String
    "acos"),         (String -> FastString
    fsLit String
    "acosf"),        (String -> FastString
    fsLit String
    "acosh"),
            (String -> FastString
    fsLit String
    "acoshf"),       (String -> FastString
    fsLit String
    "acoshl"),       (String -> FastString
    fsLit String
    "acosl"),
            (String -> FastString
    fsLit String
    "asin"),         (String -> FastString
    fsLit String
    "asinf"),        (String -> FastString
    fsLit String
    "asinl"),
            (String -> FastString
    fsLit String
    "asinh"),        (String -> FastString
    fsLit String
    "asinhf"),       (String -> FastString
    fsLit String
    "asinhl"),
            (String -> FastString
    fsLit String
    "atan"),         (String -> FastString
    fsLit String
    "atanf"),        (String -> FastString
    fsLit String
    "atanl"),
            (String -> FastString
    fsLit String
    "atan2"),        (String -> FastString
    fsLit String
    "atan2f"),       (String -> FastString
    fsLit String
    "atan2l"),
            (String -> FastString
    fsLit String
    "atanh"),        (String -> FastString
    fsLit String
    "atanhf"),       (String -> FastString
    fsLit String
    "atanhl"),
            (String -> FastString
    fsLit String
    "cbrt"),         (String -> FastString
    fsLit String
    "cbrtf"),        (String -> FastString
    fsLit String
    "cbrtl"),
            (String -> FastString
    fsLit String
    "ceil"),         (String -> FastString
    fsLit String
    "ceilf"),        (String -> FastString
    fsLit String
    "ceill"),
            (String -> FastString
    fsLit String
    "copysign"),     (String -> FastString
    fsLit String
    "copysignf"),    (String -> FastString
    fsLit String
    "copysignl"),
            (String -> FastString
    fsLit String
    "cos"),          (String -> FastString
    fsLit String
    "cosf"),         (String -> FastString
    fsLit String
    "cosl"),
            (String -> FastString
    fsLit String
    "cosh"),         (String -> FastString
    fsLit String
    "coshf"),        (String -> FastString
    fsLit String
    "coshl"),
            (String -> FastString
    fsLit String
    "erf"),          (String -> FastString
    fsLit String
    "erff"),         (String -> FastString
    fsLit String
    "erfl"),
            (String -> FastString
    fsLit String
    "erfc"),         (String -> FastString
    fsLit String
    "erfcf"),        (String -> FastString
    fsLit String
    "erfcl"),
            (String -> FastString
    fsLit String
    "exp"),          (String -> FastString
    fsLit String
    "expf"),         (String -> FastString
    fsLit String
    "expl"),
            (String -> FastString
    fsLit String
    "exp2"),         (String -> FastString
    fsLit String
    "exp2f"),        (String -> FastString
    fsLit String
    "exp2l"),
            (String -> FastString
    fsLit String
    "expm1"),        (String -> FastString
    fsLit String
    "expm1f"),       (String -> FastString
    fsLit String
    "expm1l"),
            (String -> FastString
    fsLit String
    "fabs"),         (String -> FastString
    fsLit String
    "fabsf"),        (String -> FastString
    fsLit String
    "fabsl"),
            (String -> FastString
    fsLit String
    "fdim"),         (String -> FastString
    fsLit String
    "fdimf"),        (String -> FastString
    fsLit String
    "fdiml"),
            (String -> FastString
    fsLit String
    "floor"),        (String -> FastString
    fsLit String
    "floorf"),       (String -> FastString
    fsLit String
    "floorl"),
            (String -> FastString
    fsLit String
    "fma"),          (String -> FastString
    fsLit String
    "fmaf"),         (String -> FastString
    fsLit String
    "fmal"),
            (String -> FastString
    fsLit String
    "fmax"),         (String -> FastString
    fsLit String
    "fmaxf"),        (String -> FastString
    fsLit String
    "fmaxl"),
            (String -> FastString
    fsLit String
    "fmin"),         (String -> FastString
    fsLit String
    "fminf"),        (String -> FastString
    fsLit String
    "fminl"),
            (String -> FastString
    fsLit String
    "fmod"),         (String -> FastString
    fsLit String
    "fmodf"),        (String -> FastString
    fsLit String
    "fmodl"),
            (String -> FastString
    fsLit String
    "frexp"),        (String -> FastString
    fsLit String
    "frexpf"),       (String -> FastString
    fsLit String
    "frexpl"),
            (String -> FastString
    fsLit String
    "hypot"),        (String -> FastString
    fsLit String
    "hypotf"),       (String -> FastString
    fsLit String
    "hypotl"),
            (String -> FastString
    fsLit String
    "ilogb"),        (String -> FastString
    fsLit String
    "ilogbf"),       (String -> FastString
    fsLit String
    "ilogbl"),
            (String -> FastString
    fsLit String
    "ldexp"),        (String -> FastString
    fsLit String
    "ldexpf"),       (String -> FastString
    fsLit String
    "ldexpl"),
            (String -> FastString
    fsLit String
    "lgamma"),       (String -> FastString
    fsLit String
    "lgammaf"),      (String -> FastString
    fsLit String
    "lgammal"),
            (String -> FastString
    fsLit String
    "llrint"),       (String -> FastString
    fsLit String
    "llrintf"),      (String -> FastString
    fsLit String
    "llrintl"),
            (String -> FastString
    fsLit String
    "llround"),      (String -> FastString
    fsLit String
    "llroundf"),     (String -> FastString
    fsLit String
    "llroundl"),
            (String -> FastString
    fsLit String
    "log"),          (String -> FastString
    fsLit String
    "logf"),         (String -> FastString
    fsLit String
    "logl"),
            (String -> FastString
    fsLit String
    "log10l"),       (String -> FastString
    fsLit String
    "log10"),        (String -> FastString
    fsLit String
    "log10f"),
            (String -> FastString
    fsLit String
    "log1pl"),       (String -> FastString
    fsLit String
    "log1p"),        (String -> FastString
    fsLit String
    "log1pf"),
            (String -> FastString
    fsLit String
    "log2"),         (String -> FastString
    fsLit String
    "log2f"),        (String -> FastString
    fsLit String
    "log2l"),
            (String -> FastString
    fsLit String
    "logb"),         (String -> FastString
    fsLit String
    "logbf"),        (String -> FastString
    fsLit String
    "logbl"),
            (String -> FastString
    fsLit String
    "lrint"),        (String -> FastString
    fsLit String
    "lrintf"),       (String -> FastString
    fsLit String
    "lrintl"),
            (String -> FastString
    fsLit String
    "lround"),       (String -> FastString
    fsLit String
    "lroundf"),      (String -> FastString
    fsLit String
    "lroundl"),
            (String -> FastString
    fsLit String
    "modf"),         (String -> FastString
    fsLit String
    "modff"),        (String -> FastString
    fsLit String
    "modfl"),
            (String -> FastString
    fsLit String
    "nan"),          (String -> FastString
    fsLit String
    "nanf"),         (String -> FastString
    fsLit String
    "nanl"),
            (String -> FastString
    fsLit String
    "nearbyint"),    (String -> FastString
    fsLit String
    "nearbyintf"),   (String -> FastString
    fsLit String
    "nearbyintl"),
            (String -> FastString
    fsLit String
    "nextafter"),    (String -> FastString
    fsLit String
    "nextafterf"),   (String -> FastString
    fsLit String
    "nextafterl"),
            (String -> FastString
    fsLit String
    "nexttoward"),   (String -> FastString
    fsLit String
    "nexttowardf"),  (String -> FastString
    fsLit String
    "nexttowardl"),
            (String -> FastString
    fsLit String
    "pow"),          (String -> FastString
    fsLit String
    "powf"),         (String -> FastString
    fsLit String
    "powl"),
            (String -> FastString
    fsLit String
    "remainder"),    (String -> FastString
    fsLit String
    "remainderf"),   (String -> FastString
    fsLit String
    "remainderl"),
            (String -> FastString
    fsLit String
    "remquo"),       (String -> FastString
    fsLit String
    "remquof"),      (String -> FastString
    fsLit String
    "remquol"),
            (String -> FastString
    fsLit String
    "rint"),         (String -> FastString
    fsLit String
    "rintf"),        (String -> FastString
    fsLit String
    "rintl"),
            (String -> FastString
    fsLit String
    "round"),        (String -> FastString
    fsLit String
    "roundf"),       (String -> FastString
    fsLit String
    "roundl"),
            (String -> FastString
    fsLit String
    "scalbln"),      (String -> FastString
    fsLit String
    "scalblnf"),     (String -> FastString
    fsLit String
    "scalblnl"),
            (String -> FastString
    fsLit String
    "scalbn"),       (String -> FastString
    fsLit String
    "scalbnf"),      (String -> FastString
    fsLit String
    "scalbnl"),
            (String -> FastString
    fsLit String
    "sin"),          (String -> FastString
    fsLit String
    "sinf"),         (String -> FastString
    fsLit String
    "sinl"),
            (String -> FastString
    fsLit String
    "sinh"),         (String -> FastString
    fsLit String
    "sinhf"),        (String -> FastString
    fsLit String
    "sinhl"),
            (String -> FastString
    fsLit String
    "sqrt"),         (String -> FastString
    fsLit String
    "sqrtf"),        (String -> FastString
    fsLit String
    "sqrtl"),
            (String -> FastString
    fsLit String
    "tan"),          (String -> FastString
    fsLit String
    "tanf"),         (String -> FastString
    fsLit String
    "tanl"),
            (String -> FastString
    fsLit String
    "tanh"),         (String -> FastString
    fsLit String
    "tanhf"),        (String -> FastString
    fsLit String
    "tanhl"),
            (String -> FastString
    fsLit String
    "tgamma"),       (String -> FastString
    fsLit String
    "tgammaf"),      (String -> FastString
    fsLit String
    "tgammal"),
            (String -> FastString
    fsLit String
    "trunc"),        (String -> FastString
    fsLit String
    "truncf"),       (String -> FastString
    fsLit String
    "truncl"),
            -- ISO C 99 also defines these function-like macros in math.h:
            -- fpclassify, isfinite, isinf, isnormal, signbit, isgreater,
            -- isgreaterequal, isless, islessequal, islessgreater, isunordered

            -- additional symbols from _BSD_SOURCE
            (String -> FastString
    fsLit String
    "drem"),         (String -> FastString
    fsLit String
    "dremf"),        (String -> FastString
    fsLit String
    "dreml"),
            (String -> FastString
    fsLit String
    "finite"),       (String -> FastString
    fsLit String
    "finitef"),      (String -> FastString
    fsLit String
    "finitel"),
            (String -> FastString
    fsLit String
    "gamma"),        (String -> FastString
    fsLit String
    "gammaf"),       (String -> FastString
    fsLit String
    "gammal"),
            (String -> FastString
    fsLit String
    "isinf"),        (String -> FastString
    fsLit String
    "isinff"),       (String -> FastString
    fsLit String
    "isinfl"),
            (String -> FastString
    fsLit String
    "isnan"),        (String -> FastString
    fsLit String
    "isnanf"),       (String -> FastString
    fsLit String
    "isnanl"),
            (String -> FastString
    fsLit String
    "j0"),           (String -> FastString
    fsLit String
    "j0f"),          (String -> FastString
    fsLit String
    "j0l"),
            (String -> FastString
    fsLit String
    "j1"),           (String -> FastString
    fsLit String
    "j1f"),          (String -> FastString
    fsLit String
    "j1l"),
            (String -> FastString
    fsLit String
    "jn"),           (String -> FastString
    fsLit String
    "jnf"),          (String -> FastString
    fsLit String
    "jnl"),
            (String -> FastString
    fsLit String
    "lgamma_r"),     (String -> FastString
    fsLit String
    "lgammaf_r"),    (String -> FastString
    fsLit String
    "lgammal_r"),
            (String -> FastString
    fsLit String
    "scalb"),        (String -> FastString
    fsLit String
    "scalbf"),       (String -> FastString
    fsLit String
    "scalbl"),
            (String -> FastString
    fsLit String
    "significand"),  (String -> FastString
    fsLit String
    "significandf"), (String -> FastString
    fsLit String
    "significandl"),
            (String -> FastString
    fsLit String
    "y0"),           (String -> FastString
    fsLit String
    "y0f"),          (String -> FastString
    fsLit String
    "y0l"),
            (String -> FastString
    fsLit String
    "y1"),           (String -> FastString
    fsLit String
    "y1f"),          (String -> FastString
    fsLit String
    "y1l"),
            (String -> FastString
    fsLit String
    "yn"),           (String -> FastString
    fsLit String
    "ynf"),          (String -> FastString
    fsLit String
    "ynl"),

            -- These functions are described in IEEE Std 754-2008 -
            -- Standard for Floating-Point Arithmetic and ISO/IEC TS 18661
            (String -> FastString
    fsLit String
    "nextup"),       (String -> FastString
    fsLit String
    "nextupf"),      (String -> FastString
    fsLit String
    "nextupl"),
            (String -> FastString
    fsLit String
    "nextdown"),     (String -> FastString
    fsLit String
    "nextdownf"),    (String -> FastString
    fsLit String
    "nextdownl")
        ]

    -- -----------------------------------------------------------------------------
    -- | Is a CLabel visible outside this object file or not?
    --      From the point of view of the code generator, a name is
    --      externally visible if it has to be declared as exported
    --      in the .o file's symbol table; that is, made non-static.
    externallyVisibleCLabel :: CLabel -> Bool -- not C "static"
    externallyVisibleCLabel :: CLabel -> Bool
    externallyVisibleCLabel (StringLitLabel Unique
    _)      = Bool
    False
    externallyVisibleCLabel (AsmTempLabel Unique
    _)        = Bool
    False
    externallyVisibleCLabel (AsmTempDerivedLabel CLabel
    _ FastString
    _)= Bool
    False
    externallyVisibleCLabel (RtsLabel RtsLabelInfo
    _)            = Bool
    True
    externallyVisibleCLabel (LocalBlockLabel Unique
    _)     = Bool
    False
    externallyVisibleCLabel (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    _)      = Bool
    True
    externallyVisibleCLabel (ForeignLabel{})        = Bool
    True
    externallyVisibleCLabel (IdLabel Name
    name CafInfo
    _ IdLabelInfo
    info)   = Name -> Bool
    isExternalName Name
    name Bool -> Bool -> Bool
    && IdLabelInfo -> Bool
    externallyVisibleIdLabel IdLabelInfo
    info
    externallyVisibleCLabel (CC_Label CostCentre
    _)            = Bool
    True
    externallyVisibleCLabel (CCS_Label CostCentreStack
    _)           = Bool
    True
    externallyVisibleCLabel (IPE_Label {})          = Bool
    True
    externallyVisibleCLabel (ModuleLabel {})        = Bool
    True
    externallyVisibleCLabel (DynamicLinkerLabel DynamicLinkerLabelInfo
    _ CLabel
    _)  = Bool
    False
    externallyVisibleCLabel (HpcTicksLabel Module
    _)       = Bool
    True
    externallyVisibleCLabel (LargeBitmapLabel Unique
    _)    = Bool
    False
    externallyVisibleCLabel (SRTLabel Unique
    _)            = Bool
    False
    externallyVisibleCLabel (PicBaseLabel {}) = String -> Bool
    forall a. String -> a
    panic String
    "externallyVisibleCLabel PicBaseLabel"
    externallyVisibleCLabel (DeadStripPreventer {}) = String -> Bool
    forall a. String -> a
    panic String
    "externallyVisibleCLabel DeadStripPreventer"

    externallyVisibleIdLabel :: IdLabelInfo -> Bool
    externallyVisibleIdLabel :: IdLabelInfo -> Bool
    externallyVisibleIdLabel IdLabelInfo
    LocalInfoTable  = Bool
    False
    externallyVisibleIdLabel IdLabelInfo
    LocalEntry      = Bool
    False
    externallyVisibleIdLabel IdLabelInfo
    BlockInfoTable  = Bool
    False
    externallyVisibleIdLabel IdLabelInfo
    _               = Bool
    True

    -- -----------------------------------------------------------------------------
    -- Finding the "type" of a CLabel

    -- For generating correct types in label declarations:

    data CLabelType
      = CodeLabel   -- Address of some executable instructions
      | DataLabel   -- Address of data, not a GC ptr
      | GcPtrLabel  -- Address of a (presumably static) GC object

    isCFunctionLabel :: CLabel -> Bool
    isCFunctionLabel :: CLabel -> Bool
    isCFunctionLabel CLabel
    lbl = case CLabel -> CLabelType
    labelType CLabel
    lbl of
                            CLabelType
    CodeLabel -> Bool
    True
                            CLabelType
    _other    -> Bool
    False

    isGcPtrLabel :: CLabel -> Bool
    isGcPtrLabel :: CLabel -> Bool
    isGcPtrLabel CLabel
    lbl = case CLabel -> CLabelType
    labelType CLabel
    lbl of
                            CLabelType
    GcPtrLabel -> Bool
    True
                            CLabelType
    _other     -> Bool
    False

    -- | Work out the general type of data at the address of this label
    --    whether it be code, data, or static GC object.
    labelType :: CLabel -> CLabelType
    labelType :: CLabel -> CLabelType
    labelType (IdLabel Name
    _ CafInfo
    _ IdLabelInfo
    info)                    = IdLabelInfo -> CLabelType
    idInfoLabelType IdLabelInfo
    info
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmData)              = CLabelType
    DataLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmClosure)           = CLabelType
    GcPtrLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmCode)              = CLabelType
    CodeLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmInfo)              = CLabelType
    DataLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmEntry)             = CLabelType
    CodeLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmPrimCall)          = CLabelType
    CodeLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmRetInfo)           = CLabelType
    DataLabel
    labelType (CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    CmmRet)               = CLabelType
    CodeLabel
    labelType (RtsLabel (RtsSelectorInfoTable Bool
    _ Int
    _)) = CLabelType
    DataLabel
    labelType (RtsLabel (RtsApInfoTable Bool
    _ Int
    _))       = CLabelType
    DataLabel
    labelType (RtsLabel (RtsApFast NonDetFastString
    _))              = CLabelType
    CodeLabel
    labelType (RtsLabel RtsLabelInfo
    _)                          = CLabelType
    DataLabel
    labelType (LocalBlockLabel Unique
    _)                   = CLabelType
    CodeLabel
    labelType (SRTLabel Unique
    _)                          = CLabelType
    DataLabel
    labelType (ForeignLabel FastString
    _ Maybe Int
    _ ForeignLabelSource
    _ FunctionOrData
    IsFunction)       = CLabelType
    CodeLabel
    labelType (ForeignLabel FastString
    _ Maybe Int
    _ ForeignLabelSource
    _ FunctionOrData
    IsData)           = CLabelType
    DataLabel
    labelType (AsmTempLabel Unique
    _)                      = String -> CLabelType
    forall a. String -> a
    panic String
    "labelType(AsmTempLabel)"
    labelType (AsmTempDerivedLabel CLabel
    _ FastString
    _)             = String -> CLabelType
    forall a. String -> a
    panic String
    "labelType(AsmTempDerivedLabel)"
    labelType (StringLitLabel Unique
    _)                    = CLabelType
    DataLabel
    labelType (CC_Label CostCentre
    _)                          = CLabelType
    DataLabel
    labelType (CCS_Label CostCentreStack
    _)                         = CLabelType
    DataLabel
    labelType (IPE_Label {})                        = CLabelType
    DataLabel
    labelType (ModuleLabel Module
    _ ModuleLabelKind
    kind)                  = ModuleLabelKind -> CLabelType
    moduleLabelKindType ModuleLabelKind
    kind
    labelType (DynamicLinkerLabel DynamicLinkerLabelInfo
    _ CLabel
    _)              = CLabelType
    DataLabel -- Is this right?
    labelType CLabel
    PicBaseLabel                          = CLabelType
    DataLabel
    labelType (DeadStripPreventer CLabel
    _)                = CLabelType
    DataLabel
    labelType (HpcTicksLabel Module
    _)                     = CLabelType
    DataLabel
    labelType (LargeBitmapLabel Unique
    _)                  = CLabelType
    DataLabel

    moduleLabelKindType :: ModuleLabelKind -> CLabelType
    moduleLabelKindType :: ModuleLabelKind -> CLabelType
    moduleLabelKindType ModuleLabelKind
    kind =
      case ModuleLabelKind
    kind of
        MLK_Initializer String
    _    -> CLabelType
    CodeLabel
        ModuleLabelKind
    MLK_InitializerArray -> CLabelType
    DataLabel
        MLK_Finalizer String
    _      -> CLabelType
    CodeLabel
        ModuleLabelKind
    MLK_FinalizerArray   -> CLabelType
    DataLabel

    idInfoLabelType :: IdLabelInfo -> CLabelType
    idInfoLabelType :: IdLabelInfo -> CLabelType
    idInfoLabelType IdLabelInfo
    info =
      case IdLabelInfo
    info of
        IdLabelInfo
    InfoTable     -> CLabelType
    DataLabel
        IdLabelInfo
    LocalInfoTable -> CLabelType
    DataLabel
        IdLabelInfo
    BlockInfoTable -> CLabelType
    DataLabel
        IdLabelInfo
    Closure       -> CLabelType
    GcPtrLabel
        ConInfoTable {} -> CLabelType
    DataLabel
        IdLabelInfo
    ClosureTable  -> CLabelType
    DataLabel
        IdTickyInfo{} -> CLabelType
    DataLabel
        IdLabelInfo
    Bytes         -> CLabelType
    DataLabel
        IdLabelInfo
    _             -> CLabelType
    CodeLabel

    -- -----------------------------------------------------------------------------

    -- | Is a 'CLabel' defined in the current module being compiled?
    --
    -- Sometimes we can optimise references within a compilation unit in ways that
    -- we couldn't for inter-module references. This provides a conservative
    -- estimate of whether a 'CLabel' lives in the current module.
    isLocalCLabel :: Module -> CLabel -> Bool
    isLocalCLabel :: Module -> CLabel -> Bool
    isLocalCLabel Module
    this_mod CLabel
    lbl =
      case CLabel
    lbl of
        IdLabel Name
    name CafInfo
    _ IdLabelInfo
    _
          | Name -> Bool
    isInternalName Name
    name -> Bool
    True
          | Bool
    otherwise           -> (() :: Constraint) => Name -> Module
    Name -> Module
    nameModule Name
    name Module -> Module -> Bool
    forall a. Eq a => a -> a -> Bool
    == Module
    this_mod
        LocalBlockLabel Unique
    _       -> Bool
    True
        CLabel
    _                       -> Bool
    False

    -- -----------------------------------------------------------------------------

    -- | Does a 'CLabel' need dynamic linkage?
    --
    -- When referring to data in code, we need to know whether
    -- that data resides in a DLL or not. [Win32 only.]
    -- @labelDynamic@ returns @True@ if the label is located
    -- in a DLL, be it a data reference or not.
    labelDynamic :: Module -> Platform -> Bool -> CLabel -> Bool
    labelDynamic :: Module -> Platform -> Bool -> CLabel -> Bool
    labelDynamic Module
    this_mod Platform
    platform Bool
    external_dynamic_refs CLabel
    lbl =
      case CLabel
    lbl of
       -- is the RTS in a DLL or not?
       RtsLabel RtsLabelInfo
    _ ->
         Bool
    external_dynamic_refs Bool -> Bool -> Bool
    && (UnitId
    this_unit UnitId -> UnitId -> Bool
    forall a. Eq a => a -> a -> Bool
    /= UnitId
    rtsUnitId)

       IdLabel Name
    n CafInfo
    _ IdLabelInfo
    _ ->
         Bool
    external_dynamic_refs Bool -> Bool -> Bool
    && Platform -> Module -> Name -> Bool
    isDynLinkName Platform
    platform Module
    this_mod Name
    n

       -- When compiling in the "dyn" way, each package is to be linked into
       -- its own shared library.
       CmmLabel UnitId
    lbl_unit NeedExternDecl
    _ FastString
    _ CmmLabelInfo
    _
        | OS
    os OS -> OS -> Bool
    forall a. Eq a => a -> a -> Bool
    == OS
    OSMinGW32 -> Bool
    external_dynamic_refs Bool -> Bool -> Bool
    && (UnitId
    this_unit UnitId -> UnitId -> Bool
    forall a. Eq a => a -> a -> Bool
    /= UnitId
    lbl_unit)
        | Bool
    otherwise       -> Bool
    external_dynamic_refs

       LocalBlockLabel Unique
    _    -> Bool
    False

       ForeignLabel FastString
    _ Maybe Int
    _ ForeignLabelSource
    source FunctionOrData
    _  ->
           if OS
    os OS -> OS -> Bool
    forall a. Eq a => a -> a -> Bool
    == OS
    OSMinGW32
           then case ForeignLabelSource
    source of
                -- Foreign label is in some un-named foreign package (or DLL).
                ForeignLabelSource
    ForeignLabelInExternalPackage -> Bool
    True

                -- Foreign label is linked into the same package as the
                -- source file currently being compiled.
                ForeignLabelSource
    ForeignLabelInThisPackage -> Bool
    False

                -- Foreign label is in some named package.
                -- When compiling in the "dyn" way, each package is to be
                -- linked into its own DLL.
                ForeignLabelInPackage UnitId
    pkgId ->
                    Bool
    external_dynamic_refs Bool -> Bool -> Bool
    && (UnitId
    this_unit UnitId -> UnitId -> Bool
    forall a. Eq a => a -> a -> Bool
    /= UnitId
    pkgId)

           else -- On Mac OS X and on ELF platforms, false positives are OK,
                -- so we claim that all foreign imports come from dynamic
                -- libraries
                Bool
    True

       CC_Label CostCentre
    cc ->
         Bool
    external_dynamic_refs Bool -> Bool -> Bool
    && Bool -> Bool
    not (CostCentre -> Module -> Bool
    ccFromThisModule CostCentre
    cc Module
    this_mod)

       -- CCS_Label always contains a CostCentre defined in the current module
       CCS_Label CostCentreStack
    _ -> Bool
    False
       IPE_Label {} -> Bool
    True

       HpcTicksLabel Module
    m ->
         Bool
    external_dynamic_refs Bool -> Bool -> Bool
    && Module
    this_mod Module -> Module -> Bool
    forall a. Eq a => a -> a -> Bool
    /= Module
    m

       -- Note that DynamicLinkerLabels do NOT require dynamic linking themselves.
       CLabel
    _                 -> Bool
    False
      where
        os :: OS
    os        = Platform -> OS
    platformOS Platform
    platform
        this_unit :: UnitId
    this_unit = GenUnit UnitId -> UnitId
    toUnitId (Module -> GenUnit UnitId
    forall unit. GenModule unit -> unit
    moduleUnit Module
    this_mod)

    -----------------------------------------------------------------------------
    -- Printing out CLabels.

    {-
    Convention:

          <name>_<type>

    where <name> is <Module>_<name> for external names and <unique> for
    internal names. <type> is one of the following:

             info                   Info table
             srt                    Static reference table
             entry                  Entry code (function, closure)
             slow                   Slow entry code (if any)
             ret                    Direct return address
             vtbl                   Vector table
             <n>_alt                Case alternative (tag n)
             dflt                   Default case alternative
             btm                    Large bitmap vector
             closure                Static closure
             con_entry              Dynamic Constructor entry code
             con_info               Dynamic Constructor info table
             static_entry           Static Constructor entry code
             static_info            Static Constructor info table
             sel_info               Selector info table
             sel_entry              Selector entry code
             cc                     Cost centre
             ccs                    Cost centre stack

    Many of these distinctions are only for documentation reasons.  For
    example, _ret is only distinguished from _entry to make it easy to
    tell whether a code fragment is a return point or a closure/function
    entry.

    Note [Closure and info labels]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    For a function 'foo, we have:
       foo_info    : Points to the info table describing foo's closure
                     (and entry code for foo with tables next to code)
       foo_closure : Static (no-free-var) closure only:
                     points to the statically-allocated closure

    For a data constructor (such as Just or Nothing), we have:
        Just_con_info: Info table for the data constructor itself
                       the first word of a heap-allocated Just
        Just_info:     Info table for the *worker function*, an
                       ordinary Haskell function of arity 1 that
                       allocates a (Just x) box:
                          Just = \x -> Just x
        Just_closure:  The closure for this worker

        Nothing_closure: a statically allocated closure for Nothing
        Nothing_static_info: info table for Nothing_closure

    All these must be exported symbol, EXCEPT Just_info.  We don't need to
    export this because in other modules we either have
           * A reference to 'Just'; use Just_closure
           * A saturated call 'Just x'; allocate using Just_con_info
    Not exporting these Just_info labels reduces the number of symbols
    somewhat.

    Note [Bytes label]
    ~~~~~~~~~~~~~~~~~~
    For a top-level string literal 'foo', we have just one symbol 'foo_bytes', which
    points to a static data block containing the content of the literal.

    Note [Proc-point local block entry-points]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    A label for a proc-point local block entry-point has no "_entry" suffix. With
    `infoTblLbl` we derive an info table label from a proc-point block ID. If
    we convert such an info table label into an entry label we must produce
    the label without an "_entry" suffix. So an info table label records
    the fact that it was derived from a block ID in `IdLabelInfo` as
    `BlockInfoTable`.

    The info table label and the local block label are both local labels
    and are not externally visible.

    Note [Bangs in CLabel]
    ~~~~~~~~~~~~~~~~~~~~~~
    There are some carefully placed strictness annotations in this module,
    which were discovered in !5226 to significantly reduce compile-time
    allocation.  Take care if you want to remove them!

    -}

    instance OutputableP Platform CLabel where
      {-# INLINE pdoc #-} -- see Note [Bangs in CLabel]
      pdoc :: Platform -> CLabel -> SDoc
    pdoc !Platform
    platform CLabel
    lbl = (PprStyle -> SDoc) -> SDoc
    getPprStyle ((PprStyle -> SDoc) -> SDoc) -> (PprStyle -> SDoc) -> SDoc
    forall a b. (a -> b) -> a -> b
    $ \PprStyle
    pp_sty ->
                            let !sty :: LabelStyle
    sty = case PprStyle
    pp_sty of
                                        PprCode LabelStyle
    sty -> LabelStyle
    sty
                                        PprStyle
    _           -> LabelStyle
    CStyle
                            in Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel Platform
    platform LabelStyle
    sty CLabel
    lbl

    pprCLabel :: Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel :: Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel !Platform
    platform !LabelStyle
    sty CLabel
    lbl = -- see Note [Bangs in CLabel]
      let
        !use_leading_underscores :: Bool
    use_leading_underscores = Platform -> Bool
    platformLeadingUnderscore Platform
    platform

        -- some platform (e.g. Darwin) require a leading "_" for exported asm
        -- symbols
        maybe_underscore :: SDoc -> SDoc
        maybe_underscore :: SDoc -> SDoc
    maybe_underscore SDoc
    doc = case LabelStyle
    sty of
          LabelStyle
    AsmStyle | Bool
    use_leading_underscores -> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> SDoc
    doc
          LabelStyle
    _                                  -> SDoc
    doc

        tempLabelPrefixOrUnderscore :: Platform -> SDoc
        tempLabelPrefixOrUnderscore :: Platform -> SDoc
    tempLabelPrefixOrUnderscore Platform
    platform = case LabelStyle
    sty of
          LabelStyle
    AsmStyle -> Platform -> SDoc
    asmTempLabelPrefix Platform
    platform
          LabelStyle
    CStyle   -> Char -> SDoc
    char Char
    '_'

      in case CLabel
    lbl of
       LocalBlockLabel Unique
    u -> case LabelStyle
    sty of
          LabelStyle
    AsmStyle -> Platform -> SDoc
    tempLabelPrefixOrUnderscore Platform
    platform SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    pprUniqueAlways Unique
    u
          LabelStyle
    CStyle   -> Platform -> SDoc
    tempLabelPrefixOrUnderscore Platform
    platform SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "blk_" SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    pprUniqueAlways Unique
    u

       AsmTempLabel Unique
    u
          -> Platform -> SDoc
    tempLabelPrefixOrUnderscore Platform
    platform SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    pprUniqueAlways Unique
    u

       AsmTempDerivedLabel CLabel
    l FastString
    suf
          -> Platform -> SDoc
    asmTempLabelPrefix Platform
    platform
             SDoc -> SDoc -> SDoc
    <> case CLabel
    l of AsmTempLabel Unique
    u    -> Unique -> SDoc
    pprUniqueAlways Unique
    u
                          LocalBlockLabel Unique
    u -> Unique -> SDoc
    pprUniqueAlways Unique
    u
                          CLabel
    _other            -> Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel Platform
    platform LabelStyle
    sty CLabel
    l
             SDoc -> SDoc -> SDoc
    <> FastString -> SDoc
    ftext FastString
    suf

       DynamicLinkerLabel DynamicLinkerLabelInfo
    info CLabel
    lbl
          -> Platform -> DynamicLinkerLabelInfo -> SDoc -> SDoc
    pprDynamicLinkerAsmLabel Platform
    platform DynamicLinkerLabelInfo
    info (Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel Platform
    platform LabelStyle
    AsmStyle CLabel
    lbl)

       CLabel
    PicBaseLabel
          -> String -> SDoc
    text String
    "1b"

       DeadStripPreventer CLabel
    lbl
          ->
          {-
             `lbl` can be temp one but we need to ensure that dsp label will stay
             in the final binary so we prepend non-temp prefix ("dsp_") and
             optional `_` (underscore) because this is how you mark non-temp symbols
             on some platforms (Darwin)
          -}
          SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "dsp_" SDoc -> SDoc -> SDoc
    <> Platform -> LabelStyle -> CLabel -> SDoc
    pprCLabel Platform
    platform LabelStyle
    sty CLabel
    lbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_dsp"

       StringLitLabel Unique
    u
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ Unique -> SDoc
    pprUniqueAlways Unique
    u SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_str"

       ForeignLabel FastString
    fs (Just Int
    sz) ForeignLabelSource
    _ FunctionOrData
    _
          | LabelStyle
    AsmStyle <- LabelStyle
    sty
          , OS
    OSMinGW32 <- Platform -> OS
    platformOS Platform
    platform
          -> -- In asm mode, we need to put the suffix on a stdcall ForeignLabel.
             -- (The C compiler does this itself).
             SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs SDoc -> SDoc -> SDoc
    <> Char -> SDoc
    char Char
    '@' SDoc -> SDoc -> SDoc
    <> Int -> SDoc
    int Int
    sz

       ForeignLabel FastString
    fs Maybe Int
    _ ForeignLabelSource
    _ FunctionOrData
    _
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs

       IdLabel Name
    name CafInfo
    _cafs IdLabelInfo
    flavor -> case LabelStyle
    sty of
          LabelStyle
    AsmStyle -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ SDoc
    internalNamePrefix SDoc -> SDoc -> SDoc
    <> Name -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Name
    name SDoc -> SDoc -> SDoc
    <> IdLabelInfo -> SDoc
    ppIdFlavor IdLabelInfo
    flavor
                       where
                          isRandomGenerated :: Bool
    isRandomGenerated = Bool -> Bool
    not (Name -> Bool
    isExternalName Name
    name)
                          internalNamePrefix :: SDoc
    internalNamePrefix =
                             if Bool
    isRandomGenerated
                                then Platform -> SDoc
    asmTempLabelPrefix Platform
    platform
                                else SDoc
    empty
          LabelStyle
    CStyle   -> Name -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Name
    name SDoc -> SDoc -> SDoc
    <> IdLabelInfo -> SDoc
    ppIdFlavor IdLabelInfo
    flavor

       SRTLabel Unique
    u
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ Platform -> SDoc
    tempLabelPrefixOrUnderscore Platform
    platform SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    pprUniqueAlways Unique
    u SDoc -> SDoc -> SDoc
    <> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "srt"

       RtsLabel (RtsApFast (NonDetFastString FastString
    str))
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    str SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_fast"

       RtsLabel (RtsSelectorInfoTable Bool
    upd_reqd Int
    offset)
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ [SDoc] -> SDoc
    hcat [ String -> SDoc
    text String
    "stg_sel_", String -> SDoc
    text (Int -> String
    forall a. Show a => a -> String
    show Int
    offset)
                                     , if Bool
    upd_reqd
                                        then String -> SDoc
    text String
    "_upd_info"
                                        else String -> SDoc
    text String
    "_noupd_info"
                                     ]

       RtsLabel (RtsSelectorEntry Bool
    upd_reqd Int
    offset)
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ [SDoc] -> SDoc
    hcat [ String -> SDoc
    text String
    "stg_sel_", String -> SDoc
    text (Int -> String
    forall a. Show a => a -> String
    show Int
    offset)
                                     , if Bool
    upd_reqd
                                        then String -> SDoc
    text String
    "_upd_entry"
                                        else String -> SDoc
    text String
    "_noupd_entry"
                                     ]

       RtsLabel (RtsApInfoTable Bool
    upd_reqd Int
    arity)
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ [SDoc] -> SDoc
    hcat [ String -> SDoc
    text String
    "stg_ap_", String -> SDoc
    text (Int -> String
    forall a. Show a => a -> String
    show Int
    arity)
                                     , if Bool
    upd_reqd
                                        then String -> SDoc
    text String
    "_upd_info"
                                        else String -> SDoc
    text String
    "_noupd_info"
                                     ]

       RtsLabel (RtsApEntry Bool
    upd_reqd Int
    arity)
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ [SDoc] -> SDoc
    hcat [ String -> SDoc
    text String
    "stg_ap_", String -> SDoc
    text (Int -> String
    forall a. Show a => a -> String
    show Int
    arity)
                                     , if Bool
    upd_reqd
                                        then String -> SDoc
    text String
    "_upd_entry"
                                        else String -> SDoc
    text String
    "_noupd_entry"
                                     ]

       RtsLabel (RtsPrimOp PrimOp
    primop)
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "stg_" SDoc -> SDoc -> SDoc
    <> PrimOp -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr PrimOp
    primop

       RtsLabel (RtsSlowFastTickyCtr String
    pat)
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "SLOW_CALL_fast_" SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    pat SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_ctr"

       LargeBitmapLabel Unique
    u
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ Platform -> SDoc
    tempLabelPrefixOrUnderscore Platform
    platform
                                SDoc -> SDoc -> SDoc
    <> Char -> SDoc
    char Char
    'b' SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    pprUniqueAlways Unique
    u SDoc -> SDoc -> SDoc
    <> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "btm"
                                -- Some bitmaps for tuple constructors have a numeric tag (e.g. '7')
                                -- until that gets resolved we'll just force them to start
                                -- with a letter so the label will be legal assembly code.

       HpcTicksLabel Module
    mod
          -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "_hpc_tickboxes_"  SDoc -> SDoc -> SDoc
    <> Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    mod SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_hpc"

       CC_Label CostCentre
    cc   -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ CostCentre -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr CostCentre
    cc
       CCS_Label CostCentreStack
    ccs -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ CostCentreStack -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr CostCentreStack
    ccs
       IPE_Label (InfoProvEnt CLabel
    l Int
    _ String
    _ Module
    m Maybe (RealSrcSpan, String)
    _) -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ (LabelStyle -> SDoc -> SDoc
    pprCode LabelStyle
    CStyle (Platform -> CLabel -> SDoc
    forall env a. OutputableP env a => env -> a -> SDoc
    pdoc Platform
    platform CLabel
    l) SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_" SDoc -> SDoc -> SDoc
    <> Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    m SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_ipe")
       ModuleLabel Module
    mod ModuleLabelKind
    kind        -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    mod SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_" SDoc -> SDoc -> SDoc
    <> ModuleLabelKind -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr ModuleLabelKind
    kind

       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmCode     -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmData     -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmPrimCall -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmInfo     -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_info"
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmEntry    -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_entry"
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmRetInfo  -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_info"
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmRet      -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_ret"
       CmmLabel UnitId
    _ NeedExternDecl
    _ FastString
    fs CmmLabelInfo
    CmmClosure  -> SDoc -> SDoc
    maybe_underscore (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ FastString -> SDoc
    ftext FastString
    fs SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "_closure"

    -- Note [Internal proc labels]
    -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~
    -- Some tools (e.g. the `perf` utility on Linux) rely on the symbol table
    -- for resolution of function names. To help these tools we provide the
    -- (enabled by default) -fexpose-all-symbols flag which causes GHC to produce
    -- symbols even for symbols with are internal to a module (although such
    -- symbols will have only local linkage).
    --
    -- Note that these labels are *not* referred to by code. They are strictly for
    -- diagnostics purposes.
    --
    -- To avoid confusion, it is desirable to add a module-qualifier to the
    -- symbol name. However, the Name type's Internal constructor doesn't carry
    -- knowledge of the current Module. Consequently, we have to pass this around
    -- explicitly.

    -- | Generate a label for a procedure internal to a module (if
    -- 'Opt_ExposeAllSymbols' is enabled).
    -- See Note [Internal proc labels].
    ppInternalProcLabel :: Module     -- ^ the current module
                        -> CLabel
                        -> Maybe SDoc -- ^ the internal proc label
    ppInternalProcLabel :: Module -> CLabel -> Maybe SDoc
    ppInternalProcLabel Module
    this_mod (IdLabel Name
    nm CafInfo
    _ IdLabelInfo
    flavour)
      | Name -> Bool
    isInternalName Name
    nm
      = SDoc -> Maybe SDoc
    forall a. a -> Maybe a
    Just
         (SDoc -> Maybe SDoc) -> SDoc -> Maybe SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "_" SDoc -> SDoc -> SDoc
    <> Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    this_mod
        SDoc -> SDoc -> SDoc
    <> Char -> SDoc
    char Char
    '_'
        SDoc -> SDoc -> SDoc
    <> FastZString -> SDoc
    ztext (FastString -> FastZString
    zEncodeFS (OccName -> FastString
    occNameFS (Name -> OccName
    forall name. HasOccName name => name -> OccName
    occName Name
    nm)))
        SDoc -> SDoc -> SDoc
    <> Char -> SDoc
    char Char
    '_'
        SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    pprUniqueAlways (Name -> Unique
    forall a. Uniquable a => a -> Unique
    getUnique Name
    nm)
        SDoc -> SDoc -> SDoc
    <> IdLabelInfo -> SDoc
    ppIdFlavor IdLabelInfo
    flavour
    ppInternalProcLabel Module
    _ CLabel
    _ = Maybe SDoc
    forall a. Maybe a
    Nothing

    ppIdFlavor :: IdLabelInfo -> SDoc
    ppIdFlavor :: IdLabelInfo -> SDoc
    ppIdFlavor IdLabelInfo
    x = SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> case IdLabelInfo
    x of
       IdLabelInfo
    Closure          -> String -> SDoc
    text String
    "closure"
       IdLabelInfo
    InfoTable        -> String -> SDoc
    text String
    "info"
       IdLabelInfo
    LocalInfoTable   -> String -> SDoc
    text String
    "info"
       IdLabelInfo
    Entry            -> String -> SDoc
    text String
    "entry"
       IdLabelInfo
    LocalEntry       -> String -> SDoc
    text String
    "entry"
       IdLabelInfo
    Slow             -> String -> SDoc
    text String
    "slow"
       IdTickyInfo TickyIdInfo
    TickyRednCounts
          -> String -> SDoc
    text String
    "ct"
       IdTickyInfo (TickyInferedTag Unique
    unique)
          -> String -> SDoc
    text String
    "ct_inf_tag" SDoc -> SDoc -> SDoc
    <> Char -> SDoc
    char Char
    '_' SDoc -> SDoc -> SDoc
    <> Unique -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Unique
    unique
       ConEntry ConInfoTableLocation
    loc      ->
          case ConInfoTableLocation
    loc of
            ConInfoTableLocation
    DefinitionSite -> String -> SDoc
    text String
    "con_entry"
            UsageSite Module
    m Int
    n ->
              Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    m SDoc -> SDoc -> SDoc
    <> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> Int -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Int
    n SDoc -> SDoc -> SDoc
    <> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "con_entry"
       ConInfoTable ConInfoTableLocation
    k   ->
        case ConInfoTableLocation
    k of
          ConInfoTableLocation
    DefinitionSite -> String -> SDoc
    text String
    "con_info"
          UsageSite Module
    m Int
    n ->
            Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    m SDoc -> SDoc -> SDoc
    <> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> Int -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Int
    n SDoc -> SDoc -> SDoc
    <> SDoc
    pp_cSEP SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "con_info"
       IdLabelInfo
    ClosureTable     -> String -> SDoc
    text String
    "closure_tbl"
       IdLabelInfo
    Bytes            -> String -> SDoc
    text String
    "bytes"
       IdLabelInfo
    BlockInfoTable   -> String -> SDoc
    text String
    "info"

    pp_cSEP :: SDoc
    pp_cSEP :: SDoc
    pp_cSEP = Char -> SDoc
    char Char
    '_'

    instance Outputable ForeignLabelSource where
     ppr :: ForeignLabelSource -> SDoc
    ppr ForeignLabelSource
    fs
      = case ForeignLabelSource
    fs of
            ForeignLabelInPackage UnitId
    pkgId     -> SDoc -> SDoc
    parens (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "package: " SDoc -> SDoc -> SDoc
    <> UnitId -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr UnitId
    pkgId
            ForeignLabelSource
    ForeignLabelInThisPackage       -> SDoc -> SDoc
    parens (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "this package"
            ForeignLabelSource
    ForeignLabelInExternalPackage   -> SDoc -> SDoc
    parens (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ String -> SDoc
    text String
    "external package"

    -- -----------------------------------------------------------------------------
    -- Machine-dependent knowledge about labels.

    asmTempLabelPrefix :: Platform -> SDoc  -- for formatting labels
    asmTempLabelPrefix :: Platform -> SDoc
    asmTempLabelPrefix !Platform
    platform = case Platform -> OS
    platformOS Platform
    platform of
        OS
    OSDarwin -> String -> SDoc
    text String
    "L"
        OS
    OSAIX    -> String -> SDoc
    text String
    "__L" -- follow IBM XL C's convention
        OS
    _        -> String -> SDoc
    text String
    ".L"

    pprDynamicLinkerAsmLabel :: Platform -> DynamicLinkerLabelInfo -> SDoc -> SDoc
    pprDynamicLinkerAsmLabel :: Platform -> DynamicLinkerLabelInfo -> SDoc -> SDoc
    pprDynamicLinkerAsmLabel !Platform
    platform DynamicLinkerLabelInfo
    dllInfo SDoc
    ppLbl =
        case Platform -> OS
    platformOS Platform
    platform of
          OS
    OSDarwin
            | Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == Arch
    ArchX86_64 ->
              case DynamicLinkerLabelInfo
    dllInfo of
                DynamicLinkerLabelInfo
    CodeStub        -> Char -> SDoc
    char Char
    'L' SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "$stub"
                DynamicLinkerLabelInfo
    SymbolPtr       -> Char -> SDoc
    char Char
    'L' SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "$non_lazy_ptr"
                DynamicLinkerLabelInfo
    GotSymbolPtr    -> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@GOTPCREL"
                DynamicLinkerLabelInfo
    GotSymbolOffset -> SDoc
    ppLbl
            | Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == Arch
    ArchAArch64 -> SDoc
    ppLbl
            | Bool
    otherwise ->
              case DynamicLinkerLabelInfo
    dllInfo of
                DynamicLinkerLabelInfo
    CodeStub  -> Char -> SDoc
    char Char
    'L' SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "$stub"
                DynamicLinkerLabelInfo
    SymbolPtr -> Char -> SDoc
    char Char
    'L' SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "$non_lazy_ptr"
                DynamicLinkerLabelInfo
    _         -> String -> SDoc
    forall a. String -> a
    panic String
    "pprDynamicLinkerAsmLabel"

          OS
    OSAIX ->
              case DynamicLinkerLabelInfo
    dllInfo of
                DynamicLinkerLabelInfo
    SymbolPtr -> String -> SDoc
    text String
    "LC.." SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl -- GCC's naming convention
                DynamicLinkerLabelInfo
    _         -> String -> SDoc
    forall a. String -> a
    panic String
    "pprDynamicLinkerAsmLabel"

          OS
    _ | OS -> Bool
    osElfTarget (Platform -> OS
    platformOS Platform
    platform) -> SDoc
    elfLabel

          OS
    OSMinGW32 ->
              case DynamicLinkerLabelInfo
    dllInfo of
                DynamicLinkerLabelInfo
    SymbolPtr -> String -> SDoc
    text String
    "__imp_" SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl
                DynamicLinkerLabelInfo
    _         -> String -> SDoc
    forall a. String -> a
    panic String
    "pprDynamicLinkerAsmLabel"

          OS
    _ -> String -> SDoc
    forall a. String -> a
    panic String
    "pprDynamicLinkerAsmLabel"
      where
        elfLabel :: SDoc
    elfLabel
          | Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == Arch
    ArchPPC
          = case DynamicLinkerLabelInfo
    dllInfo of
              DynamicLinkerLabelInfo
    CodeStub  -> -- See Note [.LCTOC1 in PPC PIC code]
                           SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "+32768@plt"
              DynamicLinkerLabelInfo
    SymbolPtr -> String -> SDoc
    text String
    ".LC_" SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl
              DynamicLinkerLabelInfo
    _         -> String -> SDoc
    forall a. String -> a
    panic String
    "pprDynamicLinkerAsmLabel"

          | Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == Arch
    ArchAArch64
          = SDoc
    ppLbl

          | Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == Arch
    ArchX86_64
          = case DynamicLinkerLabelInfo
    dllInfo of
              DynamicLinkerLabelInfo
    CodeStub        -> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@plt"
              DynamicLinkerLabelInfo
    GotSymbolPtr    -> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@gotpcrel"
              DynamicLinkerLabelInfo
    GotSymbolOffset -> SDoc
    ppLbl
              DynamicLinkerLabelInfo
    SymbolPtr       -> String -> SDoc
    text String
    ".LC_" SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl

          | Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == PPC_64ABI -> Arch
    ArchPPC_64 PPC_64ABI
    ELF_V1
            Bool -> Bool -> Bool
    || Platform -> Arch
    platformArch Platform
    platform Arch -> Arch -> Bool
    forall a. Eq a => a -> a -> Bool
    == PPC_64ABI -> Arch
    ArchPPC_64 PPC_64ABI
    ELF_V2
          = case DynamicLinkerLabelInfo
    dllInfo of
              DynamicLinkerLabelInfo
    GotSymbolPtr    -> String -> SDoc
    text String
    ".LC_"  SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@toc"
              DynamicLinkerLabelInfo
    GotSymbolOffset -> SDoc
    ppLbl
              DynamicLinkerLabelInfo
    SymbolPtr       -> String -> SDoc
    text String
    ".LC_" SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl
              DynamicLinkerLabelInfo
    _               -> String -> SDoc
    forall a. String -> a
    panic String
    "pprDynamicLinkerAsmLabel"

          | Bool
    otherwise
          = case DynamicLinkerLabelInfo
    dllInfo of
              DynamicLinkerLabelInfo
    CodeStub        -> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@plt"
              DynamicLinkerLabelInfo
    SymbolPtr       -> String -> SDoc
    text String
    ".LC_" SDoc -> SDoc -> SDoc
    <> SDoc
    ppLbl
              DynamicLinkerLabelInfo
    GotSymbolPtr    -> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@got"
              DynamicLinkerLabelInfo
    GotSymbolOffset -> SDoc
    ppLbl SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "@gotoff"

    -- Figure out whether `symbol` may serve as an alias
    -- to `target` within one compilation unit.
    --
    -- This is true if any of these holds:
    -- * `target` is a module-internal haskell name.
    -- * `target` is an exported name, but comes from the same
    --   module as `symbol`
    --
    -- These are sufficient conditions for establishing e.g. a
    -- GNU assembly alias ('.equiv' directive). Sadly, there is
    -- no such thing as an alias to an imported symbol (conf.
    -- http://blog.omega-prime.co.uk/2011/07/06/the-sad-state-of-symbol-aliases/)
    -- See Note [emit-time elimination of static indirections].
    --
    -- Precondition is that both labels represent the
    -- same semantic value.

    mayRedirectTo :: CLabel -> CLabel -> Bool
    mayRedirectTo :: CLabel -> CLabel -> Bool
    mayRedirectTo CLabel
    symbol CLabel
    target
     | Just Name
    nam <- Maybe Name
    haskellName
     , Bool
    staticClosureLabel
     , Name -> Bool
    isExternalName Name
    nam
     , Just Module
    mod <- Name -> Maybe Module
    nameModule_maybe Name
    nam
     , Just Name
    anam <- CLabel -> Maybe Name
    hasHaskellName CLabel
    symbol
     , Just Module
    amod <- Name -> Maybe Module
    nameModule_maybe Name
    anam
     = Module
    amod Module -> Module -> Bool
    forall a. Eq a => a -> a -> Bool
    == Module
    mod

     | Just Name
    nam <- Maybe Name
    haskellName
     , Bool
    staticClosureLabel
     , Name -> Bool
    isInternalName Name
    nam
     = Bool
    True

     | Bool
    otherwise = Bool
    False
       where staticClosureLabel :: Bool
    staticClosureLabel = CLabel -> Bool
    isStaticClosureLabel CLabel
    target
             haskellName :: Maybe Name
    haskellName = CLabel -> Maybe Name
    hasHaskellName CLabel
    target

    {-
    Note [emit-time elimination of static indirections]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    As described in #15155, certain static values are representationally
    equivalent, e.g. 'cast'ed values (when created by 'newtype' wrappers).

                 newtype A = A Int
                 {-# NOINLINE a #-}
                 a = A 42

    a1_rYB :: Int
    [GblId, Caf=NoCafRefs, Unf=OtherCon []]
    a1_rYB = GHC.Types.I# 42#

    a [InlPrag=NOINLINE] :: A
    [GblId, Unf=OtherCon []]
    a = a1_rYB `cast` (Sym (T15155.N:A[0]) :: Int ~R# A)

    Formerly we created static indirections for these (IND_STATIC), which
    consist of a statically allocated forwarding closure that contains
    the (possibly tagged) indirectee. (See CMM/assembly below.)
    This approach is suboptimal for two reasons:
      (a) they occupy extra space,
      (b) they need to be entered in order to obtain the indirectee,
          thus they cannot be tagged.

    Fortunately there is a common case where static indirections can be
    eliminated while emitting assembly (native or LLVM), viz. when the
    indirectee is in the same module (object file) as the symbol that
    points to it. In this case an assembly-level identification can
    be created ('.equiv' directive), and as such the same object will
    be assigned two names in the symbol table. Any of the identified
    symbols can be referenced by a tagged pointer.

    Currently the 'mayRedirectTo' predicate will
    give a clue whether a label can be equated with another, already
    emitted, label (which can in turn be an alias). The general mechanics
    is that we identify data (IND_STATIC closures) that are amenable
    to aliasing while pretty-printing of assembly output, and emit the
    '.equiv' directive instead of static data in such a case.

    Here is a sketch how the output is massaged:

                         Consider
    newtype A = A Int
    {-# NOINLINE a #-}
    a = A 42                                -- I# 42# is the indirectee
                                            -- 'a' is exported

                     results in STG

    a1_rXq :: GHC.Types.Int
    [GblId, Caf=NoCafRefs, Unf=OtherCon []] =
        CCS_DONT_CARE GHC.Types.I#! [42#];

    T15155.a [InlPrag=NOINLINE] :: T15155.A
    [GblId, Unf=OtherCon []] =
        CAF_ccs  \ u  []  a1_rXq;

                     and CMM

    [section ""data" . a1_rXq_closure" {
         a1_rXq_closure:
             const GHC.Types.I#_con_info;
             const 42;
     }]

    [section ""data" . T15155.a_closure" {
         T15155.a_closure:
             const stg_IND_STATIC_info;
             const a1_rXq_closure+1;
             const 0;
             const 0;
     }]

    The emitted assembly is

    ==== INDIRECTEE
    a1_rXq_closure:                         -- module local haskell value
            .quad   GHC.Types.I#_con_info   -- an Int
            .quad   42

    ==== BEFORE
    .globl T15155.a_closure                 -- exported newtype wrapped value
    T15155.a_closure:
            .quad   stg_IND_STATIC_info     -- the closure info
            .quad   a1_rXq_closure+1        -- indirectee ('+1' being the tag)
            .quad   0
            .quad   0

    ==== AFTER
    .globl T15155.a_closure                 -- exported newtype wrapped value
    .equiv a1_rXq_closure,T15155.a_closure  -- both are shared

    The transformation is performed because
         T15155.a_closure `mayRedirectTo` a1_rXq_closure+1
    returns True.
    -}