+ -- We replace the original top-level binding by a value projected from the vectorised
+ -- closure and add any newly created hoisted top-level bindings.
+ ; cexpr <- tryConvert var var' expr
+ ; hs <- takeHoisted
+ ; return . Rec $ (var, cexpr) : (var', expr') : hs
+ }
+ `orElseV`
+ return b
+vectTopBind b@(Rec bs)
+ = let (vars, exprs) = unzip bs
+ in
+ do { (vars', _, exprs', hs) <- fixV $
+ \ ~(_, inlines, rhss, _) ->
+ do { -- Vectorise the right-hand sides, create an appropriate top-level bindings and
+ -- add them to the vectorisation map.
+ ; vars' <- sequence [vectTopBinder var inline rhs
+ | (var, ~(inline, rhs)) <- zipLazy vars (zip inlines rhss)]
+ ; (inlines, areScalars, exprs') <- mapAndUnzip3M (uncurry $ vectTopRhs vars) bs
+ ; hs <- takeHoisted
+ ; if and areScalars
+ then -- (1) Entire recursive group is scalar
+ -- => add all variables to the global set of scalars
+ do { mapM addGlobalScalar vars
+ ; return (vars', inlines, exprs', hs)
+ }
+ else -- (2) At least one binding is not scalar
+ -- => vectorise again with empty set of local scalars
+ do { (inlines, _, exprs') <- mapAndUnzip3M (uncurry $ vectTopRhs []) bs
+ ; hs <- takeHoisted
+ ; return (vars', inlines, exprs', hs)
+ }
+ }
+
+ -- Replace the original top-level bindings by a values projected from the vectorised
+ -- closures and add any newly created hoisted top-level bindings to the group.
+ ; cexprs <- sequence $ zipWith3 tryConvert vars vars' exprs
+ ; return . Rec $ zip vars cexprs ++ zip vars' exprs' ++ hs
+ }
+ `orElseV`
+ return b
+
+-- | Make the vectorised version of this top level binder, and add the mapping
+-- between it and the original to the state. For some binder @foo@ the vectorised
+-- version is @$v_foo@
+--
+-- NOTE: vectTopBinder *MUST* be lazy in inline and expr because of how it is
+-- used inside of fixV in vectTopBind
+--
+vectTopBinder :: Var -- ^ Name of the binding.
+ -> Inline -- ^ Whether it should be inlined, used to annotate it.
+ -> CoreExpr -- ^ RHS of binding, used to set the 'Unfolding' of the returned 'Var'.
+ -> VM Var -- ^ Name of the vectorised binding.
+vectTopBinder var inline expr
+ = do { -- Vectorise the type attached to the var.
+ ; vty <- vectType (idType var)
+
+ -- If there is a vectorisation declartion for this binding, make sure that its type
+ -- matches
+ ; vectDecl <- lookupVectDecl var
+ ; case vectDecl of
+ Nothing -> return ()
+ Just (vdty, _)
+ | coreEqType vty vdty -> return ()
+ | otherwise ->
+ cantVectorise ("Type mismatch in vectorisation pragma for " ++ show var) $
+ (text "Expected type" <+> ppr vty)
+ $$
+ (text "Inferred type" <+> ppr vdty)