import {-# SOURCE #-} DsExpr( dsExpr )
+import DsMonad
+import DsGRHSs ( dsGuarded )
+import DsUtils
import HsSyn -- lots of things
import CoreSyn -- lots of things
import CoreUtils ( exprType, mkInlineMe, mkSCC )
import TcHsSyn ( TypecheckedMonoBinds )
-import DsMonad
-import DsGRHSs ( dsGuarded )
-import DsUtils
import Match ( matchWrapper )
import CmdLineOpts ( opt_AutoSccsOnAllToplevs, opt_AutoSccsOnExportedToplevs )
import CostCentre ( mkAutoCC, IsCafCC(..) )
-import Id ( idType, idName, isUserExportedId, isSpecPragmaId, Id )
+import Id ( idType, idName, isExportedId, isSpecPragmaId, Id )
import NameSet
import VarSet
-import Type ( mkTyVarTy )
-import Subst ( mkTyVarSubst, substTy )
+import TcType ( mkTyVarTy )
+import Subst ( substTyWith )
import TysWiredIn ( voidTy )
import Outputable
import Maybe ( isJust )
= dsMonoBinds auto_scc binds_2 rest `thenDs` \ rest' ->
dsMonoBinds auto_scc binds_1 rest'
-dsMonoBinds _ (CoreMonoBind var core_expr) rest
- = returnDs ((var, core_expr) : rest)
-
dsMonoBinds _ (VarMonoBind var expr) rest
= dsExpr expr `thenDs` \ core_expr ->
dsMonoBinds auto_scc (FunMonoBind fun _ matches locn) rest
= putSrcLocDs locn $
- matchWrapper (FunMatch fun) matches error_string `thenDs` \ (args, body) ->
+ matchWrapper (FunRhs (idName fun)) matches `thenDs` \ (args, body) ->
addAutoScc auto_scc (fun, mkLams args body) `thenDs` \ pair ->
returnDs (pair : rest)
- where
- error_string = "function " ++ showSDoc (ppr fun)
dsMonoBinds auto_scc (PatMonoBind pat grhss locn) rest
= putSrcLocDs locn $
returnDs (sel_binds ++ rest)
-- Common special case: no type or dictionary abstraction
+ -- For the (rare) case when there are some mixed-up
+ -- dictionary bindings (for which a Rec is convenient)
+ -- we reply on the enclosing dsBind to wrap a Rec around.
dsMonoBinds auto_scc (AbsBinds [] [] exports inlines binds) rest
= dsMonoBinds (addSccs auto_scc exports) binds []`thenDs` \ core_prs ->
let
- exports' = [(global, Var local) | (_, global, local) <- exports]
+ core_prs' = addLocalInlines exports inlines core_prs
+ exports' = [(global, Var local) | (_, global, local) <- exports]
in
- returnDs (addLocalInlines exports inlines core_prs ++ exports' ++ rest)
+ returnDs (core_prs' ++ exports' ++ rest)
-- Another common case: one exported variable
-- Non-recursive bindings come through this way
let
-- Always treat the binds as recursive, because the typechecker
-- makes rather mixed-up dictionary bindings
- core_binds = [Rec core_prs]
- global' = (global, mkInline (idName global `elemNameSet` inlines) $
+ core_bind = Rec core_prs
+
+ -- The mkInline does directly what the
+ -- addLocalInlines do in the other cases
+ export' = (global, mkInline (idName global `elemNameSet` inlines) $
mkLams tyvars $ mkLams dicts $
- mkDsLets core_binds (Var local))
+ Let core_bind (Var local))
in
- returnDs (global' : rest)
+ returnDs (export' : rest)
dsMonoBinds auto_scc (AbsBinds all_tyvars dicts exports inlines binds) rest
= dsMonoBinds (addSccs auto_scc exports) binds []`thenDs` \ core_prs ->
let
- core_binds = [Rec (addLocalInlines exports inlines core_prs)]
+ -- Rec because of mixed-up dictionary bindings
+ core_bind = Rec (addLocalInlines exports inlines core_prs)
tup_expr = mkTupleExpr locals
tup_ty = exprType tup_expr
poly_tup_expr = mkLams all_tyvars $ mkLams dicts $
- mkDsLets core_binds tup_expr
+ Let core_bind tup_expr
locals = [local | (_, _, local) <- exports]
local_tys = map idType locals
in
mk_bind (tyvars, global, local) n -- locals !! n == local
= -- Need to make fresh locals to bind in the selector, because
-- some of the tyvars will be bound to voidTy
- newSysLocalsDs (map (substTy env) local_tys) `thenDs` \ locals' ->
- newSysLocalDs (substTy env tup_ty) `thenDs` \ tup_id ->
+ newSysLocalsDs (map substitute local_tys) `thenDs` \ locals' ->
+ newSysLocalDs (substitute tup_ty) `thenDs` \ tup_id ->
returnDs (global, mkLams tyvars $ mkLams dicts $
mkTupleSelector locals' (locals' !! n) tup_id $
mkApps (mkTyApps (Var poly_tup_id) ty_args) dict_args)
where
mk_ty_arg all_tyvar | all_tyvar `elem` tyvars = mkTyVarTy all_tyvar
| otherwise = voidTy
- ty_args = map mk_ty_arg all_tyvars
- env = mkTyVarSubst all_tyvars ty_args
+ ty_args = map mk_ty_arg all_tyvars
+ substitute = substTyWith all_tyvars ty_args
in
zipWithDs mk_bind exports [0..] `thenDs` \ export_binds ->
-- don't scc (auto-)annotate the tuple itself.
addSccs TopLevel exports
= TopLevelAddSccs (\id -> case [ exp | (_,exp,loc) <- exports, loc == id ] of
(exp:_) | opt_AutoSccsOnAllToplevs ||
- (isUserExportedId exp &&
+ (isExportedId exp &&
opt_AutoSccsOnExportedToplevs)
-> Just exp
_ -> Nothing)