Make record selectors into ordinary functions

[ghc-hetmet.git] / compiler / vectorise / VectUtils.hs

diff --git a/compiler/vectorise/VectUtils.hs b/compiler/vectorise/VectUtils.hs
index fd399e0..7aef39b 100644 (file)
--- a/compiler/vectorise/VectUtils.hs
+++ b/compiler/vectorise/VectUtils.hs
@@ -30,7 +30,6 @@ import TypeRep
 import TyCon
 import DataCon
 import Var
-import Id                 ( mkWildId )
 import MkId               ( unwrapFamInstScrut )
 import TysWiredIn
 import BasicTypes         ( Boxity(..) )
@@ -124,9 +123,10 @@ mkPArrayType :: Type -> VM Type
 mkPArrayType ty
   | Just tycon <- splitPrimTyCon ty
   = do
-      arr <- traceMaybeV "mkPArrayType" (ppr tycon)
-           $ lookupPrimPArray tycon
-      return $ mkTyConApp arr []
+      r <- lookupPrimPArray tycon
+      case r of
+        Just arr -> return $ mkTyConApp arr []
+        Nothing  -> cantVectorise "Primitive tycon not vectorised" (ppr tycon)
 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
 
 mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion
@@ -153,7 +153,9 @@ mkVScrut (ve, le)
 
 prDFunOfTyCon :: TyCon -> VM CoreExpr
 prDFunOfTyCon tycon
-  = liftM Var (traceMaybeV "prDictOfTyCon" (ppr tycon) (lookupTyConPR tycon))
+  = liftM Var
+  . maybeCantVectoriseM "No PR dictionary for tycon" (ppr tycon)
+  $ lookupTyConPR tycon
 
 paDictArgType :: TyVar -> VM (Maybe Type)
 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
@@ -189,9 +191,11 @@ paDictOfTyApp (TyVarTy tv) ty_args
       paDFunApply dfun ty_args
 paDictOfTyApp (TyConApp tc _) ty_args
   = do
-      dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
+      dfun <- maybeCantVectoriseM "No PA dictionary for tycon" (ppr tc)
+            $ lookupTyConPA tc
       paDFunApply (Var dfun) ty_args
-paDictOfTyApp ty _ = pprPanic "paDictOfTyApp" (ppr ty)
+paDictOfTyApp ty _
+  = cantVectorise "Can't construct PA dictionary for type" (ppr ty)
 
 paDFunType :: TyCon -> VM Type
 paDFunType tc
@@ -221,10 +225,9 @@ pa_pack      = (packPAVar,      "packPA")
 paMethod :: PAMethod -> Type -> VM CoreExpr
 paMethod (_method, name) ty
   | Just tycon <- splitPrimTyCon ty
-  = do
-      fn <- traceMaybeV "paMethod" (ppr tycon <+> text name)
-          $ lookupPrimMethod tycon name
-      return (Var fn)
+  = liftM Var
+  . maybeCantVectoriseM "No PA method" (text name <+> text "for" <+> ppr tycon)
+  $ lookupPrimMethod tycon name
 
 paMethod (method, _name) ty
   = do
@@ -426,7 +429,7 @@ mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExp
 mkVectEnv []   []  = (unitTy, Var unitDataConId, \_ body -> body)
 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
 mkVectEnv tys  vs  = (ty, mkCoreTup (map Var vs),
-                        \env body -> Case env (mkWildId ty) (exprType body)
+                        \env body -> mkWildCase env ty (exprType body)
                                        [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
   where
     ty = mkCoreTupTy tys
@@ -456,7 +459,7 @@ mkLiftEnv lc tys vs
 
           bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
                           in
-                          return $ Case scrut (mkWildId (exprType scrut))
+                          return $ mkWildCase scrut (exprType scrut)
                                         (exprType body)
                                         [(DataAlt env_con, lc : bndrs, body)]
       return (env, bind)