+++ /dev/null
-%
-% (c) The GRASP/AQUA Project, Glasgow University, 1993-1994
-%
-%************************************************************************
-%* *
-\section[HsCore]{Core-syntax unfoldings in Haskell interface files}
-%* *
-%************************************************************************
-
-We could either use this, or parameterise @CoreExpr@ on @UniTypes@ and
-@TyVars@ as well. Currently trying the former.
-
-\begin{code}
-#include "HsVersions.h"
-
-module HsCore (
- -- types:
- UnfoldingCoreExpr(..), UnfoldingCoreAlts(..),
- UnfoldingCoreDefault(..), UnfoldingCoreBinding(..),
- UnfoldingCoreAtom(..), UfId(..), UnfoldingType(..),
- UnfoldingPrimOp(..), UfCostCentre(..),
-
- -- function:
- eqUfExpr
- ) where
-
-IMPORT_Trace
-
-import AbsPrel ( PrimOp, PrimKind )
-import AbsSynFuns ( cmpInstanceTypes )
-import BasicLit ( BasicLit )
-import HsTypes -- ( cmpPolyType, PolyType(..), MonoType )
-import Maybes ( Maybe(..) )
-import Name ( Name )
-import Outputable -- class for printing, forcing
-import Pretty -- pretty-printing utilities
-import PrimOps ( tagOf_PrimOp -- HACK
- IF_ATTACK_PRAGMAS(COMMA pprPrimOp)
- )
-import ProtoName ( cmpProtoName, eqProtoName, ProtoName(..) ) -- .. for pragmas
-import Util
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[HsCore-types]{Types for read/written Core unfoldings}
-%* *
-%************************************************************************
-
-\begin{code}
-data UnfoldingCoreExpr name
- = UfCoVar (UfId name)
- | UfCoLit BasicLit
- | UfCoCon name -- must be a "BoringUfId"...
- [UnfoldingType name]
- [UnfoldingCoreAtom name]
- | UfCoPrim (UnfoldingPrimOp name)
- [UnfoldingType name]
- [UnfoldingCoreAtom name]
- | UfCoLam [UfBinder name]
- (UnfoldingCoreExpr name)
- | UfCoTyLam name
- (UnfoldingCoreExpr name)
- | UfCoApp (UnfoldingCoreExpr name)
- (UnfoldingCoreAtom name)
- | UfCoTyApp (UnfoldingCoreExpr name)
- (UnfoldingType name)
- | UfCoCase (UnfoldingCoreExpr name)
- (UnfoldingCoreAlts name)
- | UfCoLet (UnfoldingCoreBinding name)
- (UnfoldingCoreExpr name)
- | UfCoSCC (UfCostCentre name)
- (UnfoldingCoreExpr name)
-
-type ProtoNameCoreExpr = UnfoldingCoreExpr ProtoName
-
-data UnfoldingPrimOp name
- = UfCCallOp FAST_STRING -- callee
- Bool -- True <=> casm, rather than ccall
- Bool -- True <=> might cause GC
- [UnfoldingType name] -- arg types, incl state token
- -- (which will be first)
- (UnfoldingType name) -- return type
- | UfOtherOp PrimOp
-
-data UnfoldingCoreAlts name
- = UfCoAlgAlts [(name, [UfBinder name], UnfoldingCoreExpr name)]
- (UnfoldingCoreDefault name)
- | UfCoPrimAlts [(BasicLit, UnfoldingCoreExpr name)]
- (UnfoldingCoreDefault name)
-
-data UnfoldingCoreDefault name
- = UfCoNoDefault
- | UfCoBindDefault (UfBinder name)
- (UnfoldingCoreExpr name)
-
-data UnfoldingCoreBinding name
- = UfCoNonRec (UfBinder name)
- (UnfoldingCoreExpr name)
- | UfCoRec [(UfBinder name, UnfoldingCoreExpr name)]
-
-data UnfoldingCoreAtom name
- = UfCoVarAtom (UfId name)
- | UfCoLitAtom BasicLit
-
-data UfCostCentre name
- = UfPreludeDictsCC
- Bool -- True <=> is dupd
- | UfAllDictsCC FAST_STRING -- module and group
- FAST_STRING
- Bool -- True <=> is dupd
- | UfUserCC FAST_STRING
- FAST_STRING FAST_STRING -- module and group
- Bool -- True <=> is dupd
- Bool -- True <=> is CAF
- | UfAutoCC (UfId name)
- FAST_STRING FAST_STRING -- module and group
- Bool Bool -- as above
- | UfDictCC (UfId name)
- FAST_STRING FAST_STRING -- module and group
- Bool Bool -- as above
-
-type UfBinder name = (name, UnfoldingType name)
-
-data UfId name
- = BoringUfId name
- | SuperDictSelUfId name name -- class and superclass
- | ClassOpUfId name name -- class and class op
- | DictFunUfId name -- class and type
- (UnfoldingType name)
- | ConstMethodUfId name name -- class, class op, and type
- (UnfoldingType name)
- | DefaultMethodUfId name name -- class and class op
- | SpecUfId (UfId name) -- its unspecialised "parent"
- [Maybe (MonoType name)]
- | WorkerUfId (UfId name) -- its non-working "parent"
- -- more to come?
-
-type UnfoldingType name = PolyType name
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[HsCore-print]{Printing Core unfoldings}
-%* *
-%************************************************************************
-
-\begin{code}
-instance Outputable name => Outputable (UnfoldingCoreExpr name) where
- ppr sty (UfCoVar v) = pprUfId sty v
- ppr sty (UfCoLit l) = ppr sty l
-
- ppr sty (UfCoCon c tys as)
- = ppCat [ppStr "(UfCoCon", ppr sty c, ppr sty tys, ppr sty as, ppStr ")"]
- ppr sty (UfCoPrim o tys as)
- = ppCat [ppStr "(UfCoPrim", ppr sty o, ppr sty tys, ppr sty as, ppStr ")"]
-
- ppr sty (UfCoLam bs body)
- = ppCat [ppChar '\\', ppr sty bs, ppStr "->", ppr sty body]
- ppr sty (UfCoTyLam tv body)
- = ppCat [ppStr "/\\", ppr sty tv, ppStr "->", ppr sty body]
-
- ppr sty (UfCoApp fun arg)
- = ppCat [ppStr "(UfCoApp", ppr sty fun, ppr sty arg, ppStr ")"]
- ppr sty (UfCoTyApp expr ty)
- = ppCat [ppStr "(UfCoTyApp", ppr sty expr, ppr sty ty, ppStr ")"]
-
- ppr sty (UfCoCase scrut alts)
- = ppCat [ppStr "case", ppr sty scrut, ppStr "of {", pp_alts alts, ppStr "}"]
- where
- pp_alts (UfCoAlgAlts alts deflt)
- = ppCat [ppInterleave ppSemi (map pp_alt alts), pp_deflt deflt]
- where
- pp_alt (c,bs,rhs) = ppCat [ppr sty c, ppr sty bs, ppStr "->", ppr sty rhs]
- pp_alts (UfCoPrimAlts alts deflt)
- = ppCat [ppInterleave ppSemi (map pp_alt alts), pp_deflt deflt]
- where
- pp_alt (l,rhs) = ppCat [ppr sty l, ppStr "->", ppr sty rhs]
-
- pp_deflt UfCoNoDefault = ppNil
- pp_deflt (UfCoBindDefault b rhs) = ppCat [ppr sty b, ppStr "->", ppr sty rhs]
-
- ppr sty (UfCoLet (UfCoNonRec b rhs) body)
- = ppCat [ppStr "let", ppr sty b, ppEquals, ppr sty rhs, ppStr "in", ppr sty body]
- ppr sty (UfCoLet (UfCoRec pairs) body)
- = ppCat [ppStr "letrec {", ppInterleave ppSemi (map pp_pair pairs), ppStr "} in", ppr sty body]
- where
- pp_pair (b,rhs) = ppCat [ppr sty b, ppEquals, ppr sty rhs]
-
- ppr sty (UfCoSCC uf_cc body)
- = ppCat [ppStr "_scc_ <cost-centre[ToDo]>", ppr sty body]
-
-instance Outputable name => Outputable (UnfoldingPrimOp name) where
- ppr sty (UfCCallOp str is_casm can_gc arg_tys result_ty)
- = let
- before = ppStr (if is_casm then "_casm_ ``" else "_ccall_ ")
- after = if is_casm then ppStr "'' " else ppSP
- in
- ppBesides [before, ppPStr str, after,
- ppLbrack, ppr sty arg_tys, ppRbrack, ppSP, ppr sty result_ty]
- ppr sty (UfOtherOp op)
- = ppr sty op
-
-instance Outputable name => Outputable (UnfoldingCoreAtom name) where
- ppr sty (UfCoVarAtom v) = pprUfId sty v
- ppr sty (UfCoLitAtom l) = ppr sty l
-
-pprUfId sty (BoringUfId v) = ppr sty v
-pprUfId sty (SuperDictSelUfId c sc)
- = ppBesides [ppStr "({-superdict-}", ppr sty c, ppSP, ppr sty sc, ppStr ")"]
-pprUfId sty (ClassOpUfId c op)
- = ppBesides [ppStr "({-method-}", ppr sty c, ppSP, ppr sty op, ppStr ")"]
-pprUfId sty (DictFunUfId c ty)
- = ppBesides [ppStr "({-dfun-}", ppr sty c, ppSP, ppr sty ty, ppStr ")"]
-pprUfId sty (ConstMethodUfId c op ty)
- = ppBesides [ppStr "({-constm-}", ppr sty c, ppSP, ppr sty op, ppSP, ppr sty ty, ppStr ")"]
-pprUfId sty (DefaultMethodUfId c ty)
- = ppBesides [ppStr "({-defm-}", ppr sty c, ppSP, ppr sty ty, ppStr ")"]
-
-pprUfId sty (SpecUfId unspec ty_maybes)
- = ppBesides [ppStr "({-spec-} ", pprUfId sty unspec,
- ppInterleave ppSP (map pp_ty_maybe ty_maybes), ppStr ")"]
- where
- pp_ty_maybe Nothing = ppStr "_N_"
- pp_ty_maybe (Just t) = ppr sty t
-
-pprUfId sty (WorkerUfId unwrkr)
- = ppBesides [ppStr "({-wrkr-}", pprUfId sty unwrkr, ppStr ")"]
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[HsCore-equality]{Comparing Core unfoldings}
-%* *
-%************************************************************************
-
-We want to check that they are {\em exactly} the same.
-
-\begin{code}
-eqUfExpr :: ProtoNameCoreExpr -> ProtoNameCoreExpr -> Bool
-
-eqUfExpr (UfCoVar v1) (UfCoVar v2) = eqUfId v1 v2
-eqUfExpr (UfCoLit l1) (UfCoLit l2) = l1 == l2
-
-eqUfExpr (UfCoCon c1 tys1 as1) (UfCoCon c2 tys2 as2)
- = eq_name c1 c2 && eq_lists eq_type tys1 tys2 && eq_lists eq_atom as1 as2
-eqUfExpr (UfCoPrim o1 tys1 as1) (UfCoPrim o2 tys2 as2)
- = eq_op o1 o2 && eq_lists eq_type tys1 tys2 && eq_lists eq_atom as1 as2
- where
- eq_op (UfCCallOp _ _ _ _ _) (UfCCallOp _ _ _ _ _) = True
- eq_op (UfOtherOp o1) (UfOtherOp o2)
- = tagOf_PrimOp o1 _EQ_ tagOf_PrimOp o2
-
-eqUfExpr (UfCoLam bs1 body1) (UfCoLam bs2 body2)
- = eq_lists eq_binder bs1 bs2 && eqUfExpr body1 body2
-eqUfExpr (UfCoTyLam tv1 body1) (UfCoTyLam tv2 body2)
- = eq_name tv1 tv2 && eqUfExpr body1 body2
-
-eqUfExpr (UfCoApp fun1 arg1) (UfCoApp fun2 arg2)
- = eqUfExpr fun1 fun2 && eq_atom arg1 arg2
-eqUfExpr (UfCoTyApp expr1 ty1) (UfCoTyApp expr2 ty2)
- = eqUfExpr expr1 expr2 && eq_type ty1 ty2
-
-eqUfExpr (UfCoCase scrut1 alts1) (UfCoCase scrut2 alts2)
- = eqUfExpr scrut1 scrut2 && eq_alts alts1 alts2
- where
- eq_alts (UfCoAlgAlts alts1 deflt1) (UfCoAlgAlts alts2 deflt2)
- = eq_lists eq_alt alts1 alts2 && eq_deflt deflt1 deflt2
- where
- eq_alt (c1,bs1,rhs1) (c2,bs2,rhs2)
- = eq_name c1 c2 && eq_lists eq_binder bs1 bs2 && eqUfExpr rhs1 rhs2
-
- eq_alts (UfCoPrimAlts alts1 deflt1) (UfCoPrimAlts alts2 deflt2)
- = eq_lists eq_alt alts1 alts2 && eq_deflt deflt1 deflt2
- where
- eq_alt (l1,rhs1) (l2,rhs2)
- = l1 == l2 && eqUfExpr rhs1 rhs2
-
- eq_alts _ _ = False -- catch-all
-
- eq_deflt UfCoNoDefault UfCoNoDefault = True
- eq_deflt (UfCoBindDefault b1 rhs1) (UfCoBindDefault b2 rhs2)
- = eq_binder b1 b2 && eqUfExpr rhs1 rhs2
- eq_deflt _ _ = False
-
-eqUfExpr (UfCoLet (UfCoNonRec b1 rhs1) body1) (UfCoLet (UfCoNonRec b2 rhs2) body2)
- = eq_binder b1 b2 && eqUfExpr rhs1 rhs2 && eqUfExpr body1 body2
-
-eqUfExpr (UfCoLet (UfCoRec pairs1) body1) (UfCoLet (UfCoRec pairs2) body2)
- = eq_lists eq_pair pairs1 pairs2 && eqUfExpr body1 body2
- where
- eq_pair (b1,rhs1) (b2,rhs2) = eq_binder b1 b2 && eqUfExpr rhs1 rhs2
-
-eqUfExpr (UfCoSCC cc1 body1) (UfCoSCC cc2 body2)
- = {-trace "eqUfExpr: not comparing cost-centres!"-} (eqUfExpr body1 body2)
-
-eqUfExpr _ _ = False -- Catch-all
-\end{code}
-
-\begin{code}
-eqUfId (BoringUfId n1) (BoringUfId n2)
- = eq_name n1 n2
-eqUfId (SuperDictSelUfId a1 b1) (SuperDictSelUfId a2 b2)
- = eq_name a1 a2 && eq_name b1 b2
-eqUfId (ClassOpUfId a1 b1) (ClassOpUfId a2 b2)
- = eq_name a1 a2 && eq_name b1 b2
-eqUfId (DictFunUfId c1 t1) (DictFunUfId c2 t2)
- = eq_name c1 c2 && eq_tycon t1 t2 -- NB: **** only compare TyCons ******
- where
- eq_tycon (UnoverloadedTy ty1) (UnoverloadedTy ty2)
- = case (cmpInstanceTypes ty1 ty2) of { EQ_ -> True; _ -> False }
- eq_tycon ty1 ty2
- = trace "eq_tycon" (eq_type ty1 ty2) -- desperately try something else
-
-eqUfId (ConstMethodUfId a1 b1 t1) (ConstMethodUfId a2 b2 t2)
- = eq_name a1 a2 && eq_name b1 b2 && eq_type t1 t2
-eqUfId (DefaultMethodUfId a1 b1) (DefaultMethodUfId a2 b2)
- = eq_name a1 a2 && eq_name b1 b2
-eqUfId (SpecUfId id1 tms1) (SpecUfId id2 tms2)
- = eqUfId id1 id2 && eq_lists eq_ty_maybe tms1 tms2
- where
- eq_ty_maybe Nothing Nothing = True
- eq_ty_maybe (Just ty1) (Just ty2)
- = eq_type (UnoverloadedTy ty1) (UnoverloadedTy ty2)
- -- a HACKy way to compare MonoTypes (ToDo) [WDP 94/05/02]
- eq_ty_maybe _ _ = False
-eqUfId (WorkerUfId id1) (WorkerUfId id2)
- = eqUfId id1 id2
-eqUfId _ _ = False -- catch-all
-\end{code}
-
-\begin{code}
-eq_atom (UfCoVarAtom id1) (UfCoVarAtom id2) = eqUfId id1 id2
-eq_atom (UfCoLitAtom l1) (UfCoLitAtom l2) = l1 == l2
-eq_atom _ _ = False
-
-eq_binder (n1, ty1) (n2, ty2) = eq_name n1 n2 && eq_type ty1 ty2
-
-eq_name :: ProtoName -> ProtoName -> Bool
-eq_name pn1 pn2 = eqProtoName pn1 pn2 -- uses original names
-
-eq_type ty1 ty2
- = case (cmpPolyType cmpProtoName ty1 ty2) of { EQ_ -> True; _ -> False }
-\end{code}
-
-\begin{code}
-eq_lists :: (a -> a -> Bool) -> [a] -> [a] -> Bool
-
-eq_lists eq [] [] = True
-eq_lists eq [] _ = False
-eq_lists eq _ [] = False
-eq_lists eq (x:xs) (y:ys) = eq x y && eq_lists eq xs ys
-\end{code}
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