-\%
+%
% (c) The University of Glasgow 2006
% (c) The AQUA Project, Glasgow University, 1998
%
This module contains definitions for the IdInfo for things that
have a standard form, namely:
-* data constructors
-* record selectors
-* method and superclass selectors
-* primitive operations
+- data constructors
+- record selectors
+- method and superclass selectors
+- primitive operations
\begin{code}
{-# OPTIONS -fno-warn-missing-signatures #-}
-- The above warning supression flag is a temporary kludge.
-- While working on this module you are encouraged to remove it and fix
-- any warnings in the module. See
--- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- <http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings>
-- for details
module MkId (
import TysPrim
import TysWiredIn
import PrelRules
+import Unify
import Type
import TypeRep
-import TcGadt
import Coercion
import TcType
import CoreUtils
mkCoVarLocals i [] = ([],i)
mkCoVarLocals i (x:xs) = let (ys,j) = mkCoVarLocals (i+1) xs
- y = mkCoVar (mkSysTvName (mkBuiltinUnique i) FSLIT("dc_co")) x
+ y = mkCoVar (mkSysTvName (mkBuiltinUnique i) (fsLit "dc_co")) x
in (y:ys,j)
mk_case
data_tv_set = tyVarsOfType data_ty
data_tvs = varSetElems data_tv_set
- -- *Very* tiresomely, the selectors are (unnecessarily!) overloaded over
+ -- _Very_ tiresomely, the selectors are (unnecessarily!) overloaded over
-- just the dictionaries in the types of the constructors that contain
-- the relevant field. [The Report says that pattern matching on a
-- constructor gives the same constraints as applying it.] Urgh.
us' = dropList con_arg_tys us
- arg_ids = zipWith (mkSysLocal FSLIT("rb")) us con_arg_tys
+ arg_ids = zipWith (mkSysLocal (fsLit "rb")) us con_arg_tys
bind_rhs = mkProductBox arg_ids ty
mkCoVarLocals i [] = ([],i)
mkCoVarLocals i (x:xs) = let (ys,j) = mkCoVarLocals (i+1) xs
- y = mkCoVar (mkSysTvName (mkBuiltinUnique i) FSLIT("dc_co")) x
+ y = mkCoVar (mkSysTvName (mkBuiltinUnique i) (fsLit "dc_co")) x
in (y:ys,j)
rhs = mkLams tyvars (Lam dict_id rhs_body)
mkWiredInIdName mod fs uniq id
= mkWiredInName mod (mkOccNameFS varName fs) uniq (AnId id) UserSyntax
-unsafeCoerceName = mkWiredInIdName gHC_PRIM FSLIT("unsafeCoerce#") unsafeCoerceIdKey unsafeCoerceId
-nullAddrName = mkWiredInIdName gHC_PRIM FSLIT("nullAddr#") nullAddrIdKey nullAddrId
-seqName = mkWiredInIdName gHC_PRIM FSLIT("seq") seqIdKey seqId
-realWorldName = mkWiredInIdName gHC_PRIM FSLIT("realWorld#") realWorldPrimIdKey realWorldPrimId
-lazyIdName = mkWiredInIdName gHC_BASE FSLIT("lazy") lazyIdKey lazyId
-
-errorName = mkWiredInIdName gHC_ERR FSLIT("error") errorIdKey eRROR_ID
-recSelErrorName = mkWiredInIdName gHC_ERR FSLIT("recSelError") recSelErrorIdKey rEC_SEL_ERROR_ID
-runtimeErrorName = mkWiredInIdName gHC_ERR FSLIT("runtimeError") runtimeErrorIdKey rUNTIME_ERROR_ID
-irrefutPatErrorName = mkWiredInIdName gHC_ERR FSLIT("irrefutPatError") irrefutPatErrorIdKey iRREFUT_PAT_ERROR_ID
-recConErrorName = mkWiredInIdName gHC_ERR FSLIT("recConError") recConErrorIdKey rEC_CON_ERROR_ID
-patErrorName = mkWiredInIdName gHC_ERR FSLIT("patError") patErrorIdKey pAT_ERROR_ID
-noMethodBindingErrorName = mkWiredInIdName gHC_ERR FSLIT("noMethodBindingError")
+unsafeCoerceName = mkWiredInIdName gHC_PRIM (fsLit "unsafeCoerce#") unsafeCoerceIdKey unsafeCoerceId
+nullAddrName = mkWiredInIdName gHC_PRIM (fsLit "nullAddr#") nullAddrIdKey nullAddrId
+seqName = mkWiredInIdName gHC_PRIM (fsLit "seq") seqIdKey seqId
+realWorldName = mkWiredInIdName gHC_PRIM (fsLit "realWorld#") realWorldPrimIdKey realWorldPrimId
+lazyIdName = mkWiredInIdName gHC_BASE (fsLit "lazy") lazyIdKey lazyId
+
+errorName = mkWiredInIdName gHC_ERR (fsLit "error") errorIdKey eRROR_ID
+recSelErrorName = mkWiredInIdName cONTROL_EXCEPTION (fsLit "recSelError") recSelErrorIdKey rEC_SEL_ERROR_ID
+runtimeErrorName = mkWiredInIdName cONTROL_EXCEPTION (fsLit "runtimeError") runtimeErrorIdKey rUNTIME_ERROR_ID
+irrefutPatErrorName = mkWiredInIdName cONTROL_EXCEPTION (fsLit "irrefutPatError") irrefutPatErrorIdKey iRREFUT_PAT_ERROR_ID
+recConErrorName = mkWiredInIdName cONTROL_EXCEPTION (fsLit "recConError") recConErrorIdKey rEC_CON_ERROR_ID
+patErrorName = mkWiredInIdName cONTROL_EXCEPTION (fsLit "patError") patErrorIdKey pAT_ERROR_ID
+noMethodBindingErrorName = mkWiredInIdName cONTROL_EXCEPTION (fsLit "noMethodBindingError")
noMethodBindingErrorIdKey nO_METHOD_BINDING_ERROR_ID
nonExhaustiveGuardsErrorName
- = mkWiredInIdName gHC_ERR FSLIT("nonExhaustiveGuardsError")
+ = mkWiredInIdName gHC_ERR (fsLit "nonExhaustiveGuardsError")
nonExhaustiveGuardsErrorIdKey nON_EXHAUSTIVE_GUARDS_ERROR_ID
\end{code}
\begin{code}
+------------------------------------------------
-- unsafeCoerce# :: forall a b. a -> b
unsafeCoerceId
= pcMiscPrelId unsafeCoerceName ty info
rhs = mkLams [openAlphaTyVar,openBetaTyVar,x] $
Cast (Var x) (mkUnsafeCoercion openAlphaTy openBetaTy)
+------------------------------------------------
+nullAddrId :: Id
-- nullAddr# :: Addr#
-- The reason is is here is because we don't provide
-- a way to write this literal in Haskell.
-nullAddrId
- = pcMiscPrelId nullAddrName addrPrimTy info
+nullAddrId = pcMiscPrelId nullAddrName addrPrimTy info
where
info = noCafIdInfo `setUnfoldingInfo`
mkCompulsoryUnfolding (Lit nullAddrLit)
-seqId
- = pcMiscPrelId seqName ty info
+------------------------------------------------
+seqId :: Id
+-- 'seq' is very special. See notes with
+-- See DsUtils.lhs Note [Desugaring seq (1)] and
+-- Note [Desugaring seq (2)] and
+-- Fixity is set in LoadIface.ghcPrimIface
+seqId = pcMiscPrelId seqName ty info
where
info = noCafIdInfo `setUnfoldingInfo` mkCompulsoryUnfolding rhs
[x,y] = mkTemplateLocals [alphaTy, openBetaTy]
rhs = mkLams [alphaTyVar,openBetaTyVar,x,y] (Case (Var x) x openBetaTy [(DEFAULT, [], Var y)])
+------------------------------------------------
+lazyId :: Id
-- lazy :: forall a?. a? -> a? (i.e. works for unboxed types too)
-- Used to lazify pseq: pseq a b = a `seq` lazy b
--
-- (see WorkWrap.wwExpr)
-- We could use inline phases to do this, but that would be vulnerable to changes in
-- phase numbering....we must inline precisely after strictness analysis.
-lazyId
- = pcMiscPrelId lazyIdName ty info
+lazyId = pcMiscPrelId lazyIdName ty info
where
info = noCafIdInfo
ty = mkForAllTys [alphaTyVar] (mkFunTy alphaTy alphaTy)
voidArgId :: Id
voidArgId -- :: State# RealWorld
- = mkSysLocal FSLIT("void") voidArgIdKey realWorldStatePrimTy
+ = mkSysLocal (fsLit "void") voidArgIdKey realWorldStatePrimTy
\end{code}
\begin{code}
pcMiscPrelId :: Name -> Type -> IdInfo -> Id
pcMiscPrelId name ty info
- = mkVanillaGlobal name ty info
+ = mkVanillaGlobalWithInfo name ty info
-- We lie and say the thing is imported; otherwise, we get into
-- a mess with dependency analysis; e.g., core2stg may heave in
-- random calls to GHCbase.unpackPS__. If GHCbase is the module
-- will be in "the right place" to be in scope.
pc_bottoming_Id :: Name -> Type -> Id
+-- Function of arity 1, which diverges after being given one argument
pc_bottoming_Id name ty
= pcMiscPrelId name ty bottoming_info
where
bottoming_info = vanillaIdInfo `setAllStrictnessInfo` Just strict_sig
+ `setArityInfo` 1
+ -- Make arity and strictness agree
+
-- Do *not* mark them as NoCafRefs, because they can indeed have
-- CAF refs. For example, pAT_ERROR_ID calls GHC.Err.untangle,
-- which has some CAFs
-- any pc_bottoming_Id will itself have CafRefs, which bloats
-- SRTs.
- strict_sig = mkStrictSig (mkTopDmdType [evalDmd] BotRes)
+ strict_sig = mkStrictSig (mkTopDmdType [evalDmd] BotRes)
-- These "bottom" out, no matter what their arguments
\end{code}
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