2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
4 \section[IdUtils]{Constructing PrimOp Ids}
7 #include "HsVersions.h"
9 module IdUtils ( primOpNameInfo, primOpId ) where
12 import PrelLoop -- here for paranoia checking
15 import CoreUnfold ( UnfoldingGuidance(..) )
16 import Id ( mkPreludeId )
17 import IdInfo -- quite a few things
18 import Name ( Name(..) )
19 import NameTypes ( mkPreludeCoreName )
20 import PrelMods ( pRELUDE_BUILTIN )
21 import PrimOp ( primOpInfo, tagOf_PrimOp, primOp_str,
22 PrimOpInfo(..), PrimOpResultInfo(..)
24 import Type ( mkForAllTys, mkFunTys, applyTyCon )
25 import TysWiredIn ( boolTy )
26 import Unique ( mkPrimOpIdUnique )
31 primOpNameInfo :: PrimOp -> (FAST_STRING, Name)
32 primOpId :: PrimOp -> Id
34 primOpNameInfo op = (primOp_str op, WiredInVal (primOpId op))
37 = case (primOpInfo op) of
39 mk_prim_Id op pRELUDE_BUILTIN str [] [ty,ty] (dyadic_fun_ty ty) 2
42 mk_prim_Id op pRELUDE_BUILTIN str [] [ty] (monadic_fun_ty ty) 1
45 mk_prim_Id op pRELUDE_BUILTIN str [] [ty,ty] (compare_fun_ty ty) 2
48 mk_prim_Id op pRELUDE_BUILTIN str [] [ty1] (mkFunTys [ty1] ty2) 1
50 PrimResult str tyvars arg_tys prim_tycon kind res_tys ->
51 mk_prim_Id op pRELUDE_BUILTIN str
54 (mkForAllTys tyvars (mkFunTys arg_tys (applyTyCon prim_tycon res_tys)))
55 (length arg_tys) -- arity
57 AlgResult str tyvars arg_tys tycon res_tys ->
58 mk_prim_Id op pRELUDE_BUILTIN str
61 (mkForAllTys tyvars (mkFunTys arg_tys (applyTyCon tycon res_tys)))
62 (length arg_tys) -- arity
64 mk_prim_Id prim_op mod name tyvar_tmpls arg_tys ty arity
66 (mkPrimOpIdUnique (IBOX(tagOf_PrimOp prim_op)))
67 (mkPreludeCoreName mod name)
70 `addInfo` (mkArityInfo arity)
71 `addInfo_UF` (mkUnfolding EssentialUnfolding
72 (mk_prim_unfold prim_op tyvar_tmpls arg_tys)))
77 dyadic_fun_ty ty = mkFunTys [ty, ty] ty
78 monadic_fun_ty ty = mkFunTys [ty] ty
79 compare_fun_ty ty = mkFunTys [ty, ty] boolTy
82 The functions to make common unfoldings are tedious.
85 mk_prim_unfold :: PrimOp -> [TyVar] -> [Type] -> CoreExpr{-template-}
87 mk_prim_unfold prim_op tvs arg_tys
88 = panic "IdUtils.mk_prim_unfold"
91 (inst_env, tyvars, tyvar_tys) = instantiateTyVars tvs (map getItsUnique tvs)
92 inst_arg_tys = map (instantiateTauTy inst_env) arg_tys
93 vars = mkTemplateLocals inst_arg_tys
95 mkLam tyvars vars (Prim prim_op tyvar_tys [VarArg v | v <- vars])