setLevels,
Level(..), tOP_LEVEL,
+ LevelledBind, LevelledExpr,
incMinorLvl, ltMajLvl, ltLvl, isTopLvl, isInlineCtxt
) where
alts_env = extendCaseBndrLvlEnv env expr' case_bndr incd_lvl
in
mapLvl (lvl_alt alts_env) alts `thenLvl` \ alts' ->
- returnLvl (Case expr' (case_bndr, incd_lvl) alts')
+ returnLvl (Case expr' (TB case_bndr incd_lvl) alts')
where
incd_lvl = incMinorLvl ctxt_lvl
= lvlMFE True incd_lvl new_env rhs `thenLvl` \ rhs' ->
returnLvl (con, bs', rhs')
where
- bs' = [ (b, incd_lvl) | b <- bs ]
+ bs' = [ TB b incd_lvl | b <- bs ]
new_env = extendLvlEnv alts_env bs'
\end{code}
| otherwise -- Float it out!
= lvlFloatRhs abs_vars dest_lvl env ann_expr `thenLvl` \ expr' ->
newLvlVar "lvl" abs_vars ty `thenLvl` \ var ->
- returnLvl (Let (NonRec (var,dest_lvl) expr')
+ returnLvl (Let (NonRec (TB var dest_lvl) expr')
(mkVarApps (Var var) abs_vars))
where
expr = deAnnotate ann_expr
lvlBind top_lvl ctxt_lvl env (AnnNonRec bndr rhs@(rhs_fvs,_))
| isInlineCtxt ctxt_lvl -- Don't do anything inside InlineMe
= lvlExpr ctxt_lvl env rhs `thenLvl` \ rhs' ->
- returnLvl (NonRec (bndr, ctxt_lvl) rhs', env)
+ returnLvl (NonRec (TB bndr ctxt_lvl) rhs', env)
| null abs_vars
= -- No type abstraction; clone existing binder
lvlExpr dest_lvl env rhs `thenLvl` \ rhs' ->
cloneVar top_lvl env bndr ctxt_lvl dest_lvl `thenLvl` \ (env', bndr') ->
- returnLvl (NonRec (bndr', dest_lvl) rhs', env')
+ returnLvl (NonRec (TB bndr' dest_lvl) rhs', env')
| otherwise
= -- Yes, type abstraction; create a new binder, extend substitution, etc
lvlFloatRhs abs_vars dest_lvl env rhs `thenLvl` \ rhs' ->
newPolyBndrs dest_lvl env abs_vars [bndr] `thenLvl` \ (env', [bndr']) ->
- returnLvl (NonRec (bndr', dest_lvl) rhs', env')
+ returnLvl (NonRec (TB bndr' dest_lvl) rhs', env')
where
bind_fvs = rhs_fvs `unionVarSet` idFreeVars bndr
lvlBind top_lvl ctxt_lvl env (AnnRec pairs)
| isInlineCtxt ctxt_lvl -- Don't do anything inside InlineMe
= mapLvl (lvlExpr ctxt_lvl env) rhss `thenLvl` \ rhss' ->
- returnLvl (Rec ((bndrs `zip` repeat ctxt_lvl) `zip` rhss'), env)
+ returnLvl (Rec ([TB b ctxt_lvl | b <- bndrs] `zip` rhss'), env)
| null abs_vars
= cloneRecVars top_lvl env bndrs ctxt_lvl dest_lvl `thenLvl` \ (new_env, new_bndrs) ->
mapLvl (lvlExpr ctxt_lvl new_env) rhss `thenLvl` \ new_rhss ->
- returnLvl (Rec ((new_bndrs `zip` repeat dest_lvl) `zip` new_rhss), new_env)
+ returnLvl (Rec ([TB b dest_lvl | b <- new_bndrs] `zip` new_rhss), new_env)
| isSingleton pairs && count isId abs_vars > 1
= -- Special case for self recursion where there are
in
lvlExpr body_lvl body_env rhs_body `thenLvl` \ new_rhs_body ->
newPolyBndrs dest_lvl env abs_vars [bndr] `thenLvl` \ (poly_env, [poly_bndr]) ->
- returnLvl (Rec [((poly_bndr,dest_lvl), mkLams abs_vars_w_lvls $
- mkLams new_lam_bndrs $
- Let (Rec [((new_bndr,rhs_lvl), mkLams new_lam_bndrs new_rhs_body)])
- (mkVarApps (Var new_bndr) lam_bndrs))],
+ returnLvl (Rec [(TB poly_bndr dest_lvl,
+ mkLams abs_vars_w_lvls $
+ mkLams new_lam_bndrs $
+ Let (Rec [(TB new_bndr rhs_lvl, mkLams new_lam_bndrs new_rhs_body)])
+ (mkVarApps (Var new_bndr) lam_bndrs))],
poly_env)
| otherwise -- Non-null abs_vars
= newPolyBndrs dest_lvl env abs_vars bndrs `thenLvl` \ (new_env, new_bndrs) ->
mapLvl (lvlFloatRhs abs_vars dest_lvl new_env) rhss `thenLvl` \ new_rhss ->
- returnLvl (Rec ((new_bndrs `zip` repeat dest_lvl) `zip` new_rhss), new_env)
+ returnLvl (Rec ([TB b dest_lvl | b <- new_bndrs] `zip` new_rhss), new_env)
where
(bndrs,rhss) = unzip pairs
%************************************************************************
\begin{code}
-lvlLamBndrs :: Level -> [CoreBndr] -> (Level, [(CoreBndr, Level)])
+lvlLamBndrs :: Level -> [CoreBndr] -> (Level, [TaggedBndr Level])
-- Compute the levels for the binders of a lambda group
-- The binders returned are exactly the same as the ones passed,
-- but they are now paired with a level
| isId bndr && -- Go to the next major level if this is a value binder,
not bumped_major && -- and we havn't already gone to the next level (one jump per group)
not (isOneShotLambda bndr) -- and it isn't a one-shot lambda
- = go new_lvl True ((bndr,new_lvl) : rev_lvld_bndrs) bndrs
+ = go new_lvl True (TB bndr new_lvl : rev_lvld_bndrs) bndrs
| otherwise
- = go old_lvl bumped_major ((bndr,old_lvl) : rev_lvld_bndrs) bndrs
+ = go old_lvl bumped_major (TB bndr old_lvl : rev_lvld_bndrs) bndrs
where
new_lvl = incMajorLvl old_lvl
floatConsts :: LevelEnv -> Bool
floatConsts (FloatOutSw _ float_consts, _, _, _) = float_consts
-extendLvlEnv :: LevelEnv -> [(Var,Level)] -> LevelEnv
+extendLvlEnv :: LevelEnv -> [TaggedBndr Level] -> LevelEnv
-- Used when *not* cloning
extendLvlEnv (float_lams, lvl_env, subst, id_env) prs
= (float_lams,
foldl del_subst subst prs,
foldl del_id id_env prs)
where
- add_lvl env (v,l) = extendVarEnv env v l
- del_subst env (v,_) = extendInScope env v
- del_id env (v,_) = delVarEnv env v
+ add_lvl env (TB v l) = extendVarEnv env v l
+ del_subst env (TB v _) = extendInScope env v
+ del_id env (TB v _) = delVarEnv env v
-- We must remove any clone for this variable name in case of
-- shadowing. This bit me in the following case
-- (in nofib/real/gg/Spark.hs):
extendVarEnv id_env case_bndr ([scrut_var], Var scrut_var))
extendCaseBndrLvlEnv env scrut case_bndr lvl
- = extendLvlEnv env [(case_bndr,lvl)]
+ = extendLvlEnv env [TB case_bndr lvl]
extendPolyLvlEnv dest_lvl (float_lams, lvl_env, subst, id_env) abs_vars bndr_pairs
= (float_lams,
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