{-# LANGUAGE CPP #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -Wno-incomplete-record-updates #-}
module GHC.HsToCore.Arrows ( dsProcExpr ) where
#include "HsVersions.h"
import GHC.Prelude
import GHC.HsToCore.Match
import GHC.HsToCore.Utils
import GHC.HsToCore.Monad
import GHC.Hs
import GHC.Tc.Utils.Zonk
import {-# SOURCE #-} GHC.HsToCore.Expr ( dsExpr, dsLExpr, dsLExprNoLP, dsLocalBinds,
dsSyntaxExpr )
import GHC.Tc.Utils.TcType
import GHC.Core.Type( splitPiTy )
import GHC.Core.Multiplicity
import GHC.Tc.Types.Evidence
import GHC.Core
import GHC.Core.FVs
import GHC.Core.Utils
import GHC.Core.Make
import GHC.HsToCore.Binds (dsHsWrapper)
import GHC.Types.Id
import GHC.Core.ConLike
import GHC.Builtin.Types
import GHC.Types.Basic
import GHC.Builtin.Names
import GHC.Utils.Outputable
import GHC.Utils.Panic
import GHC.Types.Var.Set
import GHC.Types.SrcLoc
import GHC.Data.List.SetOps( assocMaybe )
import Data.List (mapAccumL)
import GHC.Utils.Misc
import GHC.Types.Unique.DSet
data DsCmdEnv = DsCmdEnv {
DsCmdEnv -> CoreExpr
arr_id, DsCmdEnv -> CoreExpr
compose_id, DsCmdEnv -> CoreExpr
first_id, DsCmdEnv -> CoreExpr
app_id, DsCmdEnv -> CoreExpr
choice_id, DsCmdEnv -> CoreExpr
loop_id :: CoreExpr
}
mkCmdEnv :: CmdSyntaxTable GhcTc -> DsM ([CoreBind], DsCmdEnv)
mkCmdEnv :: CmdSyntaxTable (GhcPass 'Typechecked) -> DsM ([CoreBind], DsCmdEnv)
mkCmdEnv CmdSyntaxTable (GhcPass 'Typechecked)
tc_meths
= do { ([CoreBind]
meth_binds, [(Name, Id)]
prs) <- forall (m :: * -> *) a b c.
Applicative m =>
(a -> m (b, c)) -> [a] -> m ([b], [c])
mapAndUnzipM forall {a}.
(a, HsExpr (GhcPass 'Typechecked))
-> IOEnv (Env DsGblEnv DsLclEnv) (CoreBind, (a, Id))
mk_bind CmdSyntaxTable (GhcPass 'Typechecked)
tc_meths
; let the_arr_id :: Maybe Id
the_arr_id = forall a b. Eq a => Assoc a b -> a -> Maybe b
assocMaybe [(Name, Id)]
prs Name
arrAName
the_compose_id :: Maybe Id
the_compose_id = forall a b. Eq a => Assoc a b -> a -> Maybe b
assocMaybe [(Name, Id)]
prs Name
composeAName
the_first_id :: Maybe Id
the_first_id = forall a b. Eq a => Assoc a b -> a -> Maybe b
assocMaybe [(Name, Id)]
prs Name
firstAName
the_app_id :: Maybe Id
the_app_id = forall a b. Eq a => Assoc a b -> a -> Maybe b
assocMaybe [(Name, Id)]
prs Name
appAName
the_choice_id :: Maybe Id
the_choice_id = forall a b. Eq a => Assoc a b -> a -> Maybe b
assocMaybe [(Name, Id)]
prs Name
choiceAName
the_loop_id :: Maybe Id
the_loop_id = forall a b. Eq a => Assoc a b -> a -> Maybe b
assocMaybe [(Name, Id)]
prs Name
loopAName
; Int -> Maybe Id -> DsM ()
check_lev_poly Int
3 Maybe Id
the_arr_id
; Int -> Maybe Id -> DsM ()
check_lev_poly Int
5 Maybe Id
the_compose_id
; Int -> Maybe Id -> DsM ()
check_lev_poly Int
4 Maybe Id
the_first_id
; Int -> Maybe Id -> DsM ()
check_lev_poly Int
2 Maybe Id
the_app_id
; Int -> Maybe Id -> DsM ()
check_lev_poly Int
5 Maybe Id
the_choice_id
; Int -> Maybe Id -> DsM ()
check_lev_poly Int
4 Maybe Id
the_loop_id
; forall (m :: * -> *) a. Monad m => a -> m a
return ([CoreBind]
meth_binds, DsCmdEnv {
arr_id :: CoreExpr
arr_id = forall b. Id -> Expr b
Var (forall {a} {a}. Outputable a => Maybe a -> a -> a
unmaybe Maybe Id
the_arr_id Name
arrAName),
compose_id :: CoreExpr
compose_id = forall b. Id -> Expr b
Var (forall {a} {a}. Outputable a => Maybe a -> a -> a
unmaybe Maybe Id
the_compose_id Name
composeAName),
first_id :: CoreExpr
first_id = forall b. Id -> Expr b
Var (forall {a} {a}. Outputable a => Maybe a -> a -> a
unmaybe Maybe Id
the_first_id Name
firstAName),
app_id :: CoreExpr
app_id = forall b. Id -> Expr b
Var (forall {a} {a}. Outputable a => Maybe a -> a -> a
unmaybe Maybe Id
the_app_id Name
appAName),
choice_id :: CoreExpr
choice_id = forall b. Id -> Expr b
Var (forall {a} {a}. Outputable a => Maybe a -> a -> a
unmaybe Maybe Id
the_choice_id Name
choiceAName),
loop_id :: CoreExpr
loop_id = forall b. Id -> Expr b
Var (forall {a} {a}. Outputable a => Maybe a -> a -> a
unmaybe Maybe Id
the_loop_id Name
loopAName)
}) }
where
mk_bind :: (a, HsExpr (GhcPass 'Typechecked))
-> IOEnv (Env DsGblEnv DsLclEnv) (CoreBind, (a, Id))
mk_bind (a
std_name, HsExpr (GhcPass 'Typechecked)
expr)
= do { CoreExpr
rhs <- HsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsExpr HsExpr (GhcPass 'Typechecked)
expr
; Id
id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many (CoreExpr -> Type
exprType CoreExpr
rhs)
; forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. b -> Expr b -> Bind b
NonRec Id
id CoreExpr
rhs, (a
std_name, Id
id)) }
unmaybe :: Maybe a -> a -> a
unmaybe Maybe a
Nothing a
name = forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"mkCmdEnv" (String -> SDoc
text String
"Not found:" SDoc -> SDoc -> SDoc
<+> forall a. Outputable a => a -> SDoc
ppr a
name)
unmaybe (Just a
id) a
_ = a
id
res_type :: Type -> Type
res_type :: Type -> Type
res_type Type
ty = Type
res_ty
where
(TyCoBinder
_, Type
res_ty) = Type -> (TyCoBinder, Type)
splitPiTy Type
ty
check_lev_poly :: Int
-> Maybe Id -> DsM ()
check_lev_poly :: Int -> Maybe Id -> DsM ()
check_lev_poly Int
_ Maybe Id
Nothing = forall (m :: * -> *) a. Monad m => a -> m a
return ()
check_lev_poly Int
arity (Just Id
id)
= Type -> SDoc -> DsM ()
dsNoLevPoly (forall a. Int -> (a -> a) -> a -> a
nTimes Int
arity Type -> Type
res_type (Id -> Type
idType Id
id))
(String -> SDoc
text String
"In the result of the function" SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (forall a. Outputable a => a -> SDoc
ppr Id
id))
do_arr :: DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr :: DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids Type
b_ty Type
c_ty CoreExpr
f = forall b. Expr b -> [Expr b] -> Expr b
mkApps (DsCmdEnv -> CoreExpr
arr_id DsCmdEnv
ids) [forall b. Type -> Expr b
Type Type
b_ty, forall b. Type -> Expr b
Type Type
c_ty, CoreExpr
f]
do_compose :: DsCmdEnv -> Type -> Type -> Type ->
CoreExpr -> CoreExpr -> CoreExpr
do_compose :: DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids Type
b_ty Type
c_ty Type
d_ty CoreExpr
f CoreExpr
g
= forall b. Expr b -> [Expr b] -> Expr b
mkApps (DsCmdEnv -> CoreExpr
compose_id DsCmdEnv
ids) [forall b. Type -> Expr b
Type Type
b_ty, forall b. Type -> Expr b
Type Type
c_ty, forall b. Type -> Expr b
Type Type
d_ty, CoreExpr
f, CoreExpr
g]
do_first :: DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_first :: DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_first DsCmdEnv
ids Type
b_ty Type
c_ty Type
d_ty CoreExpr
f
= forall b. Expr b -> [Expr b] -> Expr b
mkApps (DsCmdEnv -> CoreExpr
first_id DsCmdEnv
ids) [forall b. Type -> Expr b
Type Type
b_ty, forall b. Type -> Expr b
Type Type
c_ty, forall b. Type -> Expr b
Type Type
d_ty, CoreExpr
f]
do_app :: DsCmdEnv -> Type -> Type -> CoreExpr
do_app :: DsCmdEnv -> Type -> Type -> CoreExpr
do_app DsCmdEnv
ids Type
b_ty Type
c_ty = forall b. Expr b -> [Expr b] -> Expr b
mkApps (DsCmdEnv -> CoreExpr
app_id DsCmdEnv
ids) [forall b. Type -> Expr b
Type Type
b_ty, forall b. Type -> Expr b
Type Type
c_ty]
do_choice :: DsCmdEnv -> Type -> Type -> Type ->
CoreExpr -> CoreExpr -> CoreExpr
do_choice :: DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_choice DsCmdEnv
ids Type
b_ty Type
c_ty Type
d_ty CoreExpr
f CoreExpr
g
= forall b. Expr b -> [Expr b] -> Expr b
mkApps (DsCmdEnv -> CoreExpr
choice_id DsCmdEnv
ids) [forall b. Type -> Expr b
Type Type
b_ty, forall b. Type -> Expr b
Type Type
d_ty, forall b. Type -> Expr b
Type Type
c_ty, CoreExpr
f, CoreExpr
g]
do_loop :: DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_loop :: DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_loop DsCmdEnv
ids Type
b_ty Type
c_ty Type
d_ty CoreExpr
f
= forall b. Expr b -> [Expr b] -> Expr b
mkApps (DsCmdEnv -> CoreExpr
loop_id DsCmdEnv
ids) [forall b. Type -> Expr b
Type Type
b_ty, forall b. Type -> Expr b
Type Type
d_ty, forall b. Type -> Expr b
Type Type
c_ty, CoreExpr
f]
do_premap :: DsCmdEnv -> Type -> Type -> Type ->
CoreExpr -> CoreExpr -> CoreExpr
do_premap :: DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
b_ty Type
c_ty Type
d_ty CoreExpr
f CoreExpr
g
= DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids Type
b_ty Type
c_ty Type
d_ty (DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids Type
b_ty Type
c_ty CoreExpr
f) CoreExpr
g
mkFstExpr :: Type -> Type -> DsM CoreExpr
mkFstExpr :: Type -> Type -> DsM CoreExpr
mkFstExpr Type
a_ty Type
b_ty = do
Id
a_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
a_ty
Id
b_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
b_ty
Id
pair_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many (Type -> Type -> Type
mkCorePairTy Type
a_ty Type
b_ty)
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. b -> Expr b -> Expr b
Lam Id
pair_var
(Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair Id
pair_var Id
a_var Id
b_var (forall b. Id -> Expr b
Var Id
a_var)))
mkSndExpr :: Type -> Type -> DsM CoreExpr
mkSndExpr :: Type -> Type -> DsM CoreExpr
mkSndExpr Type
a_ty Type
b_ty = do
Id
a_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
a_ty
Id
b_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
b_ty
Id
pair_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many (Type -> Type -> Type
mkCorePairTy Type
a_ty Type
b_ty)
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. b -> Expr b -> Expr b
Lam Id
pair_var
(Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair Id
pair_var Id
a_var Id
b_var (forall b. Id -> Expr b
Var Id
b_var)))
coreCaseTuple :: UniqSupply -> Id -> [Id] -> CoreExpr -> CoreExpr
coreCaseTuple :: UniqSupply -> Id -> [Id] -> CoreExpr -> CoreExpr
coreCaseTuple UniqSupply
uniqs Id
scrut_var [Id]
vars CoreExpr
body
= UniqSupply -> [Id] -> CoreExpr -> Id -> CoreExpr -> CoreExpr
mkTupleCase UniqSupply
uniqs [Id]
vars CoreExpr
body Id
scrut_var (forall b. Id -> Expr b
Var Id
scrut_var)
coreCasePair :: Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair :: Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair Id
scrut_var Id
var1 Id
var2 CoreExpr
body
= forall b. Expr b -> b -> Type -> [Alt b] -> Expr b
Case (forall b. Id -> Expr b
Var Id
scrut_var) Id
scrut_var (CoreExpr -> Type
exprType CoreExpr
body)
[forall b. AltCon -> [b] -> Expr b -> Alt b
Alt (DataCon -> AltCon
DataAlt (Boxity -> Int -> DataCon
tupleDataCon Boxity
Boxed Int
2)) [Id
var1, Id
var2] CoreExpr
body]
mkCorePairTy :: Type -> Type -> Type
mkCorePairTy :: Type -> Type -> Type
mkCorePairTy Type
t1 Type
t2 = [Type] -> Type
mkBoxedTupleTy [Type
t1, Type
t2]
mkCorePairExpr :: CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr :: CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr CoreExpr
e1 CoreExpr
e2 = [CoreExpr] -> CoreExpr
mkCoreTup [CoreExpr
e1, CoreExpr
e2]
mkCoreUnitExpr :: CoreExpr
mkCoreUnitExpr :: CoreExpr
mkCoreUnitExpr = [CoreExpr] -> CoreExpr
mkCoreTup []
envStackType :: [Id] -> Type -> Type
envStackType :: [Id] -> Type -> Type
envStackType [Id]
ids Type
stack_ty = Type -> Type -> Type
mkCorePairTy ([Id] -> Type
mkBigCoreVarTupTy [Id]
ids) Type
stack_ty
splitTypeAt :: Int -> Type -> ([Type], Type)
splitTypeAt :: Int -> Type -> ([Type], Type)
splitTypeAt Int
n Type
ty
| Int
n forall a. Eq a => a -> a -> Bool
== Int
0 = ([], Type
ty)
| Bool
otherwise = case Type -> [Type]
tcTyConAppArgs Type
ty of
[Type
t, Type
ty'] -> let ([Type]
ts, Type
ty_r) = Int -> Type -> ([Type], Type)
splitTypeAt (Int
nforall a. Num a => a -> a -> a
-Int
1) Type
ty' in (Type
tforall a. a -> [a] -> [a]
:[Type]
ts, Type
ty_r)
[Type]
_ -> forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"splitTypeAt" (forall a. Outputable a => a -> SDoc
ppr Type
ty)
buildEnvStack :: [Id] -> Id -> CoreExpr
buildEnvStack :: [Id] -> Id -> CoreExpr
buildEnvStack [Id]
env_ids Id
stack_id
= CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env_ids) (forall b. Id -> Expr b
Var Id
stack_id)
matchEnvStack :: [Id]
-> Id
-> CoreExpr
-> DsM CoreExpr
matchEnvStack :: [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
body = do
UniqSupply
uniqs <- forall gbl lcl. TcRnIf gbl lcl UniqSupply
newUniqueSupply
Id
tup_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many ([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids)
let match_env :: CoreExpr
match_env = UniqSupply -> Id -> [Id] -> CoreExpr -> CoreExpr
coreCaseTuple UniqSupply
uniqs Id
tup_var [Id]
env_ids CoreExpr
body
Id
pair_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many (Type -> Type -> Type
mkCorePairTy (Id -> Type
idType Id
tup_var) (Id -> Type
idType Id
stack_id))
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. b -> Expr b -> Expr b
Lam Id
pair_id (Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair Id
pair_id Id
tup_var Id
stack_id CoreExpr
match_env))
matchEnv :: [Id]
-> CoreExpr
-> DsM CoreExpr
matchEnv :: [Id] -> CoreExpr -> DsM CoreExpr
matchEnv [Id]
env_ids CoreExpr
body = do
UniqSupply
uniqs <- forall gbl lcl. TcRnIf gbl lcl UniqSupply
newUniqueSupply
Id
tup_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many ([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids)
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. b -> Expr b -> Expr b
Lam Id
tup_id (UniqSupply -> Id -> [Id] -> CoreExpr -> CoreExpr
coreCaseTuple UniqSupply
uniqs Id
tup_id [Id]
env_ids CoreExpr
body))
matchVarStack :: [Id] -> Id -> CoreExpr -> DsM (Id, CoreExpr)
matchVarStack :: [Id] -> Id -> CoreExpr -> DsM (Id, CoreExpr)
matchVarStack [] Id
stack_id CoreExpr
body = forall (m :: * -> *) a. Monad m => a -> m a
return (Id
stack_id, CoreExpr
body)
matchVarStack (Id
param_id:[Id]
param_ids) Id
stack_id CoreExpr
body = do
(Id
tail_id, CoreExpr
tail_code) <- [Id] -> Id -> CoreExpr -> DsM (Id, CoreExpr)
matchVarStack [Id]
param_ids Id
stack_id CoreExpr
body
Id
pair_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many (Type -> Type -> Type
mkCorePairTy (Id -> Type
idType Id
param_id) (Id -> Type
idType Id
tail_id))
forall (m :: * -> *) a. Monad m => a -> m a
return (Id
pair_id, Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair Id
pair_id Id
param_id Id
tail_id CoreExpr
tail_code)
mkHsEnvStackExpr :: [Id] -> Id -> LHsExpr GhcTc
mkHsEnvStackExpr :: [Id] -> Id -> LHsExpr (GhcPass 'Typechecked)
mkHsEnvStackExpr [Id]
env_ids Id
stack_id
= forall (p :: Pass).
[LHsExpr (GhcPass p)]
-> XExplicitTuple (GhcPass p) -> LHsExpr (GhcPass p)
mkLHsTupleExpr [forall (p :: Pass) a.
IsSrcSpanAnn p a =>
[IdP (GhcPass p)]
-> XExplicitTuple (GhcPass p) -> LHsExpr (GhcPass p)
mkLHsVarTuple [Id]
env_ids NoExtField
noExtField, forall (p :: Pass) a.
IsSrcSpanAnn p a =>
IdP (GhcPass p) -> LHsExpr (GhcPass p)
nlHsVar Id
stack_id]
NoExtField
noExtField
dsProcExpr
:: LPat GhcTc
-> LHsCmdTop GhcTc
-> DsM CoreExpr
dsProcExpr :: LPat (GhcPass 'Typechecked)
-> LHsCmdTop (GhcPass 'Typechecked) -> DsM CoreExpr
dsProcExpr LPat (GhcPass 'Typechecked)
pat (L SrcSpan
_ (HsCmdTop (CmdTopTc Type
_unitTy Type
cmd_ty CmdSyntaxTable (GhcPass 'Typechecked)
ids) LHsCmd (GhcPass 'Typechecked)
cmd)) = do
([CoreBind]
meth_binds, DsCmdEnv
meth_ids) <- CmdSyntaxTable (GhcPass 'Typechecked) -> DsM ([CoreBind], DsCmdEnv)
mkCmdEnv CmdSyntaxTable (GhcPass 'Typechecked)
ids
let locals :: VarSet
locals = [Id] -> VarSet
mkVarSet (forall p. CollectPass p => CollectFlag p -> LPat p -> [IdP p]
collectPatBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders LPat (GhcPass 'Typechecked)
pat)
(CoreExpr
core_cmd, DIdSet
_free_vars, [Id]
env_ids)
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
meth_ids VarSet
locals Type
unitTy Type
cmd_ty LHsCmd (GhcPass 'Typechecked)
cmd
let env_ty :: Type
env_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
let env_stk_ty :: Type
env_stk_ty = Type -> Type -> Type
mkCorePairTy Type
env_ty Type
unitTy
let env_stk_expr :: CoreExpr
env_stk_expr = CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env_ids) CoreExpr
mkCoreUnitExpr
CoreExpr
fail_expr <- HsMatchContext GhcRn -> Type -> DsM CoreExpr
mkFailExpr (forall p. HsArrowMatchContext -> HsMatchContext p
ArrowMatchCtxt HsArrowMatchContext
ProcExpr) Type
env_stk_ty
Id
var <- Type -> LPat (GhcPass 'Typechecked) -> DsM Id
selectSimpleMatchVarL Type
Many LPat (GhcPass 'Typechecked)
pat
CoreExpr
match_code <- CoreExpr
-> HsMatchContext GhcRn
-> LPat (GhcPass 'Typechecked)
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimply (forall b. Id -> Expr b
Var Id
var) (forall p. HsArrowMatchContext -> HsMatchContext p
ArrowMatchCtxt HsArrowMatchContext
ProcExpr) LPat (GhcPass 'Typechecked)
pat CoreExpr
env_stk_expr CoreExpr
fail_expr
let pat_ty :: Type
pat_ty = LPat (GhcPass 'Typechecked) -> Type
hsLPatType LPat (GhcPass 'Typechecked)
pat
let proc_code :: CoreExpr
proc_code = DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
meth_ids Type
pat_ty Type
env_stk_ty Type
cmd_ty
(forall b. b -> Expr b -> Expr b
Lam Id
var CoreExpr
match_code)
CoreExpr
core_cmd
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. [Bind b] -> Expr b -> Expr b
mkLets [CoreBind]
meth_binds CoreExpr
proc_code)
dsLCmd :: DsCmdEnv -> IdSet -> Type -> Type -> LHsCmd GhcTc -> [Id]
-> DsM (CoreExpr, DIdSet)
dsLCmd :: DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsLCmd DsCmdEnv
ids VarSet
local_vars Type
stk_ty Type
res_ty LHsCmd (GhcPass 'Typechecked)
cmd [Id]
env_ids
= DsCmdEnv
-> VarSet
-> Type
-> Type
-> HsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stk_ty Type
res_ty (forall l e. GenLocated l e -> e
unLoc LHsCmd (GhcPass 'Typechecked)
cmd) [Id]
env_ids
dsCmd :: DsCmdEnv
-> IdSet
-> Type
-> Type
-> HsCmd GhcTc
-> [Id]
-> DsM (CoreExpr,
DIdSet)
dsCmd :: DsCmdEnv
-> VarSet
-> Type
-> Type
-> HsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty
(HsCmdArrApp XCmdArrApp (GhcPass 'Typechecked)
arrow_ty LHsExpr (GhcPass 'Typechecked)
arrow LHsExpr (GhcPass 'Typechecked)
arg HsArrAppType
HsFirstOrderApp Bool
_)
[Id]
env_ids = do
let
(Type
a_arg_ty, Type
_res_ty') = Type -> (Type, Type)
tcSplitAppTy XCmdArrApp (GhcPass 'Typechecked)
arrow_ty
(Type
_a_ty, Type
arg_ty) = Type -> (Type, Type)
tcSplitAppTy Type
a_arg_ty
CoreExpr
core_arrow <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExprNoLP LHsExpr (GhcPass 'Typechecked)
arrow
CoreExpr
core_arg <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExpr LHsExpr (GhcPass 'Typechecked)
arg
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
CoreExpr
core_make_arg <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
core_arg
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids
([Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty)
Type
arg_ty
Type
res_ty
CoreExpr
core_make_arg
CoreExpr
core_arrow,
CoreExpr -> DIdSet
exprFreeIdsDSet CoreExpr
core_arg forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty
(HsCmdArrApp XCmdArrApp (GhcPass 'Typechecked)
arrow_ty LHsExpr (GhcPass 'Typechecked)
arrow LHsExpr (GhcPass 'Typechecked)
arg HsArrAppType
HsHigherOrderApp Bool
_)
[Id]
env_ids = do
let
(Type
a_arg_ty, Type
_res_ty') = Type -> (Type, Type)
tcSplitAppTy XCmdArrApp (GhcPass 'Typechecked)
arrow_ty
(Type
_a_ty, Type
arg_ty) = Type -> (Type, Type)
tcSplitAppTy Type
a_arg_ty
CoreExpr
core_arrow <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExpr LHsExpr (GhcPass 'Typechecked)
arrow
CoreExpr
core_arg <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExpr LHsExpr (GhcPass 'Typechecked)
arg
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
CoreExpr
core_make_pair <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id
(CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr CoreExpr
core_arrow CoreExpr
core_arg)
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids
([Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty)
(Type -> Type -> Type
mkCorePairTy XCmdArrApp (GhcPass 'Typechecked)
arrow_ty Type
arg_ty)
Type
res_ty
CoreExpr
core_make_pair
(DsCmdEnv -> Type -> Type -> CoreExpr
do_app DsCmdEnv
ids Type
arg_ty Type
res_ty),
([CoreExpr] -> DIdSet
exprsFreeIdsDSet [CoreExpr
core_arrow, CoreExpr
core_arg])
forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty (HsCmdApp XCmdApp (GhcPass 'Typechecked)
_ LHsCmd (GhcPass 'Typechecked)
cmd LHsExpr (GhcPass 'Typechecked)
arg) [Id]
env_ids = do
CoreExpr
core_arg <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExpr LHsExpr (GhcPass 'Typechecked)
arg
let
arg_ty :: Type
arg_ty = CoreExpr -> Type
exprType CoreExpr
core_arg
stack_ty' :: Type
stack_ty' = Type -> Type -> Type
mkCorePairTy Type
arg_ty Type
stack_ty
(CoreExpr
core_cmd, DIdSet
free_vars, [Id]
env_ids')
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty' Type
res_ty LHsCmd (GhcPass 'Typechecked)
cmd
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
Id
arg_id <- Type -> Type -> DsM Id
newSysLocalDsNoLP Type
Many Type
arg_ty
let
stack' :: CoreExpr
stack' = CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr (forall b. Id -> Expr b
Var Id
arg_id) (forall b. Id -> Expr b
Var Id
stack_id)
core_body :: CoreExpr
core_body = Id -> CoreExpr -> CoreExpr -> CoreExpr
bindNonRec Id
arg_id CoreExpr
core_arg
(CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env_ids') CoreExpr
stack')
CoreExpr
core_map <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
core_body
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids
([Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty)
([Id] -> Type -> Type
envStackType [Id]
env_ids' Type
stack_ty')
Type
res_ty
CoreExpr
core_map
CoreExpr
core_cmd,
DIdSet
free_vars DIdSet -> DIdSet -> DIdSet
`unionDVarSet`
(CoreExpr -> DIdSet
exprFreeIdsDSet CoreExpr
core_arg forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars))
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty
(HsCmdLam XCmdLam (GhcPass 'Typechecked)
_ (MG { mg_alts :: forall p body. MatchGroup p body -> XRec p [LMatch p body]
mg_alts
= (L SrcSpanAnnL
_ [L SrcSpanAnnA
_ (Match { m_pats :: forall p body. Match p body -> [LPat p]
m_pats = [LPat (GhcPass 'Typechecked)]
pats
, m_grhss :: forall p body. Match p body -> GRHSs p body
m_grhss = GRHSs XCGRHSs
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)))
_ [L SrcSpan
_ (GRHS XCGRHS
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)))
_ [] GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
body)] HsLocalBinds (GhcPass 'Typechecked)
_ })]) }))
[Id]
env_ids
= DsCmdEnv
-> VarSet
-> Type
-> Type
-> [LPat (GhcPass 'Typechecked)]
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLam DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty [LPat (GhcPass 'Typechecked)]
pats GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
body [Id]
env_ids
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty (HsCmdPar XCmdPar (GhcPass 'Typechecked)
_ LHsCmd (GhcPass 'Typechecked)
cmd) [Id]
env_ids
= DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsLCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty LHsCmd (GhcPass 'Typechecked)
cmd [Id]
env_ids
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty (HsCmdIf XCmdIf (GhcPass 'Typechecked)
_ SyntaxExpr (GhcPass 'Typechecked)
mb_fun LHsExpr (GhcPass 'Typechecked)
cond LHsCmd (GhcPass 'Typechecked)
then_cmd LHsCmd (GhcPass 'Typechecked)
else_cmd)
[Id]
env_ids = do
CoreExpr
core_cond <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExpr LHsExpr (GhcPass 'Typechecked)
cond
(CoreExpr
core_then, DIdSet
fvs_then, [Id]
then_ids)
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty LHsCmd (GhcPass 'Typechecked)
then_cmd
(CoreExpr
core_else, DIdSet
fvs_else, [Id]
else_ids)
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty LHsCmd (GhcPass 'Typechecked)
else_cmd
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
TyCon
either_con <- Name -> DsM TyCon
dsLookupTyCon Name
eitherTyConName
DataCon
left_con <- Name -> DsM DataCon
dsLookupDataCon Name
leftDataConName
DataCon
right_con <- Name -> DsM DataCon
dsLookupDataCon Name
rightDataConName
let mk_left_expr :: Type -> Type -> CoreExpr -> CoreExpr
mk_left_expr Type
ty1 Type
ty2 CoreExpr
e = DataCon -> [CoreExpr] -> CoreExpr
mkCoreConApps DataCon
left_con [forall b. Type -> Expr b
Type Type
ty1,forall b. Type -> Expr b
Type Type
ty2, CoreExpr
e]
mk_right_expr :: Type -> Type -> CoreExpr -> CoreExpr
mk_right_expr Type
ty1 Type
ty2 CoreExpr
e = DataCon -> [CoreExpr] -> CoreExpr
mkCoreConApps DataCon
right_con [forall b. Type -> Expr b
Type Type
ty1,forall b. Type -> Expr b
Type Type
ty2, CoreExpr
e]
in_ty :: Type
in_ty = [Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty
then_ty :: Type
then_ty = [Id] -> Type -> Type
envStackType [Id]
then_ids Type
stack_ty
else_ty :: Type
else_ty = [Id] -> Type -> Type
envStackType [Id]
else_ids Type
stack_ty
sum_ty :: Type
sum_ty = TyCon -> [Type] -> Type
mkTyConApp TyCon
either_con [Type
then_ty, Type
else_ty]
fvs_cond :: DIdSet
fvs_cond = CoreExpr -> DIdSet
exprFreeIdsDSet CoreExpr
core_cond
forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars
core_left :: CoreExpr
core_left = Type -> Type -> CoreExpr -> CoreExpr
mk_left_expr Type
then_ty Type
else_ty
([Id] -> Id -> CoreExpr
buildEnvStack [Id]
then_ids Id
stack_id)
core_right :: CoreExpr
core_right = Type -> Type -> CoreExpr -> CoreExpr
mk_right_expr Type
then_ty Type
else_ty
([Id] -> Id -> CoreExpr
buildEnvStack [Id]
else_ids Id
stack_id)
CoreExpr
core_if <- case SyntaxExpr (GhcPass 'Typechecked)
mb_fun of
SyntaxExpr (GhcPass 'Typechecked)
SyntaxExprTc
NoSyntaxExprTc -> [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id forall a b. (a -> b) -> a -> b
$
CoreExpr -> CoreExpr -> CoreExpr -> CoreExpr
mkIfThenElse CoreExpr
core_cond CoreExpr
core_left CoreExpr
core_right
SyntaxExpr (GhcPass 'Typechecked)
_ -> do { CoreExpr
fun_apps <- SyntaxExpr (GhcPass 'Typechecked) -> [CoreExpr] -> DsM CoreExpr
dsSyntaxExpr SyntaxExpr (GhcPass 'Typechecked)
mb_fun
[CoreExpr
core_cond, CoreExpr
core_left, CoreExpr
core_right]
; [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
fun_apps }
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
in_ty Type
sum_ty Type
res_ty
CoreExpr
core_if
(DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_choice DsCmdEnv
ids Type
then_ty Type
else_ty Type
res_ty CoreExpr
core_then CoreExpr
core_else),
DIdSet
fvs_cond DIdSet -> DIdSet -> DIdSet
`unionDVarSet` DIdSet
fvs_then DIdSet -> DIdSet -> DIdSet
`unionDVarSet` DIdSet
fvs_else)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty
(HsCmdCase XCmdCase (GhcPass 'Typechecked)
_ LHsExpr (GhcPass 'Typechecked)
exp (MG { mg_alts :: forall p body. MatchGroup p body -> XRec p [LMatch p body]
mg_alts = L SrcSpanAnnL
l [GenLocated
SrcSpanAnnA
(Match
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
matches
, mg_ext :: forall p body. MatchGroup p body -> XMG p body
mg_ext = MatchGroupTc [Scaled Type]
arg_tys Type
_
, mg_origin :: forall p body. MatchGroup p body -> Origin
mg_origin = Origin
origin }))
[Id]
env_ids = do
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
let
leaves :: [(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)), VarSet)]
leaves = forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap forall (body :: * -> *).
LMatch
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
-> [(LocatedA (body (GhcPass 'Typechecked)), VarSet)]
leavesMatch [GenLocated
SrcSpanAnnA
(Match
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
matches
make_branch :: (GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)), VarSet)
-> IOEnv
(Env DsGblEnv DsLclEnv)
([LocatedA (HsExpr (GhcPass 'Typechecked))], Type, CoreExpr)
make_branch (GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
leaf, VarSet
bound_vars) = do
(CoreExpr
core_leaf, DIdSet
_fvs, [Id]
leaf_ids)
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids (VarSet
bound_vars VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
local_vars) Type
stack_ty
Type
res_ty GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
leaf
forall (m :: * -> *) a. Monad m => a -> m a
return ([[Id] -> Id -> LHsExpr (GhcPass 'Typechecked)
mkHsEnvStackExpr [Id]
leaf_ids Id
stack_id],
[Id] -> Type -> Type
envStackType [Id]
leaf_ids Type
stack_ty,
CoreExpr
core_leaf)
[([LocatedA (HsExpr (GhcPass 'Typechecked))], Type, CoreExpr)]
branches <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)), VarSet)
-> IOEnv
(Env DsGblEnv DsLclEnv)
([LocatedA (HsExpr (GhcPass 'Typechecked))], Type, CoreExpr)
make_branch [(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)), VarSet)]
leaves
TyCon
either_con <- Name -> DsM TyCon
dsLookupTyCon Name
eitherTyConName
DataCon
left_con <- Name -> DsM DataCon
dsLookupDataCon Name
leftDataConName
DataCon
right_con <- Name -> DsM DataCon
dsLookupDataCon Name
rightDataConName
let
left_id :: HsExpr (GhcPass 'Typechecked)
left_id = forall p. XConLikeOut p -> ConLike -> HsExpr p
HsConLikeOut NoExtField
noExtField (DataCon -> ConLike
RealDataCon DataCon
left_con)
right_id :: HsExpr (GhcPass 'Typechecked)
right_id = forall p. XConLikeOut p -> ConLike -> HsExpr p
HsConLikeOut NoExtField
noExtField (DataCon -> ConLike
RealDataCon DataCon
right_con)
left_expr :: Type
-> Type
-> LocatedA (HsExpr (GhcPass 'Typechecked))
-> LocatedA (HsExpr (GhcPass 'Typechecked))
left_expr Type
ty1 Type
ty2 LocatedA (HsExpr (GhcPass 'Typechecked))
e = forall a an. a -> LocatedAn an a
noLocA forall a b. (a -> b) -> a -> b
$ forall p. XApp p -> LHsExpr p -> LHsExpr p -> HsExpr p
HsApp EpAnnCO
noComments
(forall a an. a -> LocatedAn an a
noLocA forall a b. (a -> b) -> a -> b
$ HsWrapper
-> HsExpr (GhcPass 'Typechecked) -> HsExpr (GhcPass 'Typechecked)
mkHsWrap ([Type] -> HsWrapper
mkWpTyApps [Type
ty1, Type
ty2]) HsExpr (GhcPass 'Typechecked)
left_id ) LocatedA (HsExpr (GhcPass 'Typechecked))
e
right_expr :: Type
-> Type
-> LocatedA (HsExpr (GhcPass 'Typechecked))
-> LocatedA (HsExpr (GhcPass 'Typechecked))
right_expr Type
ty1 Type
ty2 LocatedA (HsExpr (GhcPass 'Typechecked))
e = forall a an. a -> LocatedAn an a
noLocA forall a b. (a -> b) -> a -> b
$ forall p. XApp p -> LHsExpr p -> LHsExpr p -> HsExpr p
HsApp EpAnnCO
noComments
(forall a an. a -> LocatedAn an a
noLocA forall a b. (a -> b) -> a -> b
$ HsWrapper
-> HsExpr (GhcPass 'Typechecked) -> HsExpr (GhcPass 'Typechecked)
mkHsWrap ([Type] -> HsWrapper
mkWpTyApps [Type
ty1, Type
ty2]) HsExpr (GhcPass 'Typechecked)
right_id) LocatedA (HsExpr (GhcPass 'Typechecked))
e
merge_branches :: ([LHsExpr GhcTc], Type, CoreExpr)
-> ([LHsExpr GhcTc], Type, CoreExpr)
-> ([LHsExpr GhcTc], Type, CoreExpr)
merge_branches :: ([LHsExpr (GhcPass 'Typechecked)], Type, CoreExpr)
-> ([LHsExpr (GhcPass 'Typechecked)], Type, CoreExpr)
-> ([LHsExpr (GhcPass 'Typechecked)], Type, CoreExpr)
merge_branches ([LHsExpr (GhcPass 'Typechecked)]
builds1, Type
in_ty1, CoreExpr
core_exp1)
([LHsExpr (GhcPass 'Typechecked)]
builds2, Type
in_ty2, CoreExpr
core_exp2)
= (forall a b. (a -> b) -> [a] -> [b]
map (Type
-> Type
-> LocatedA (HsExpr (GhcPass 'Typechecked))
-> LocatedA (HsExpr (GhcPass 'Typechecked))
left_expr Type
in_ty1 Type
in_ty2) [LHsExpr (GhcPass 'Typechecked)]
builds1 forall a. [a] -> [a] -> [a]
++
forall a b. (a -> b) -> [a] -> [b]
map (Type
-> Type
-> LocatedA (HsExpr (GhcPass 'Typechecked))
-> LocatedA (HsExpr (GhcPass 'Typechecked))
right_expr Type
in_ty1 Type
in_ty2) [LHsExpr (GhcPass 'Typechecked)]
builds2,
TyCon -> [Type] -> Type
mkTyConApp TyCon
either_con [Type
in_ty1, Type
in_ty2],
DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_choice DsCmdEnv
ids Type
in_ty1 Type
in_ty2 Type
res_ty CoreExpr
core_exp1 CoreExpr
core_exp2)
([LocatedA (HsExpr (GhcPass 'Typechecked))]
leaves', Type
sum_ty, CoreExpr
core_choices) = forall a. (a -> a -> a) -> [a] -> a
foldb ([LHsExpr (GhcPass 'Typechecked)], Type, CoreExpr)
-> ([LHsExpr (GhcPass 'Typechecked)], Type, CoreExpr)
-> ([LHsExpr (GhcPass 'Typechecked)], Type, CoreExpr)
merge_branches [([LocatedA (HsExpr (GhcPass 'Typechecked))], Type, CoreExpr)]
branches
([LocatedA (HsExpr (GhcPass 'Typechecked))]
_, [GenLocated
SrcSpanAnnA
(Match
(GhcPass 'Typechecked) (LocatedA (HsExpr (GhcPass 'Typechecked))))]
matches') = forall (t :: * -> *) s a b.
Traversable t =>
(s -> a -> (s, b)) -> s -> t a -> (s, t b)
mapAccumL (forall (body' :: * -> *) (body :: * -> *).
(Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))),
Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(GRHS
(GhcPass 'Typechecked)
(LocatedA (body (GhcPass 'Typechecked))))) =>
Type
-> [LocatedA (body' (GhcPass 'Typechecked))]
-> LMatch
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
-> ([LocatedA (body' (GhcPass 'Typechecked))],
LMatch
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
replaceLeavesMatch Type
res_ty) [LocatedA (HsExpr (GhcPass 'Typechecked))]
leaves' [GenLocated
SrcSpanAnnA
(Match
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
matches
in_ty :: Type
in_ty = [Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty
CoreExpr
core_body <- HsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsExpr (forall p.
XCase p -> LHsExpr p -> MatchGroup p (LHsExpr p) -> HsExpr p
HsCase NoExtField
noExtField LHsExpr (GhcPass 'Typechecked)
exp
(MG { mg_alts :: XRec
(GhcPass 'Typechecked)
[LMatch
(GhcPass 'Typechecked) (LocatedA (HsExpr (GhcPass 'Typechecked)))]
mg_alts = forall l e. l -> e -> GenLocated l e
L SrcSpanAnnL
l [GenLocated
SrcSpanAnnA
(Match
(GhcPass 'Typechecked) (LocatedA (HsExpr (GhcPass 'Typechecked))))]
matches'
, mg_ext :: XMG
(GhcPass 'Typechecked) (LocatedA (HsExpr (GhcPass 'Typechecked)))
mg_ext = [Scaled Type] -> Type -> MatchGroupTc
MatchGroupTc [Scaled Type]
arg_tys Type
sum_ty
, mg_origin :: Origin
mg_origin = Origin
origin }))
CoreExpr
core_matches <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
core_body
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
in_ty Type
sum_ty Type
res_ty CoreExpr
core_matches CoreExpr
core_choices,
CoreExpr -> DIdSet
exprFreeIdsDSet CoreExpr
core_body forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty
(HsCmdLamCase XCmdLamCase (GhcPass 'Typechecked)
_ mg :: MatchGroup (GhcPass 'Typechecked) (LHsCmd (GhcPass 'Typechecked))
mg@MG { mg_ext :: forall p body. MatchGroup p body -> XMG p body
mg_ext = MatchGroupTc [Scaled Type
arg_mult Type
arg_ty] Type
_ }) [Id]
env_ids = do
Id
arg_id <- Type -> Type -> DsM Id
newSysLocalDs Type
arg_mult Type
arg_ty
let case_cmd :: GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
case_cmd = forall a an. a -> LocatedAn an a
noLocA forall a b. (a -> b) -> a -> b
$ forall id.
XCmdCase id -> LHsExpr id -> MatchGroup id (LHsCmd id) -> HsCmd id
HsCmdCase NoExtField
noExtField (forall (p :: Pass) a.
IsSrcSpanAnn p a =>
IdP (GhcPass p) -> LHsExpr (GhcPass p)
nlHsVar Id
arg_id) MatchGroup (GhcPass 'Typechecked) (LHsCmd (GhcPass 'Typechecked))
mg
DsCmdEnv
-> VarSet
-> Type
-> Type
-> [LPat (GhcPass 'Typechecked)]
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLam DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty [forall (p :: Pass) a.
IsSrcSpanAnn p a =>
IdP (GhcPass p) -> LPat (GhcPass p)
nlVarPat Id
arg_id] GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
case_cmd [Id]
env_ids
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty (HsCmdLet XCmdLet (GhcPass 'Typechecked)
_ lbinds :: HsLocalBinds (GhcPass 'Typechecked)
lbinds@HsLocalBinds (GhcPass 'Typechecked)
binds LHsCmd (GhcPass 'Typechecked)
body) [Id]
env_ids = do
let
defined_vars :: VarSet
defined_vars = [Id] -> VarSet
mkVarSet (forall (idL :: Pass) (idR :: Pass).
CollectPass (GhcPass idL) =>
CollectFlag (GhcPass idL)
-> HsLocalBindsLR (GhcPass idL) (GhcPass idR)
-> [IdP (GhcPass idL)]
collectLocalBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders HsLocalBinds (GhcPass 'Typechecked)
binds)
local_vars' :: VarSet
local_vars' = VarSet
defined_vars VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
local_vars
(CoreExpr
core_body, DIdSet
_free_vars, [Id]
env_ids')
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars' Type
stack_ty Type
res_ty LHsCmd (GhcPass 'Typechecked)
body
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
CoreExpr
core_binds <- HsLocalBinds (GhcPass 'Typechecked) -> CoreExpr -> DsM CoreExpr
dsLocalBinds HsLocalBinds (GhcPass 'Typechecked)
lbinds ([Id] -> Id -> CoreExpr
buildEnvStack [Id]
env_ids' Id
stack_id)
CoreExpr
core_map <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
core_binds
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids
([Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty)
([Id] -> Type -> Type
envStackType [Id]
env_ids' Type
stack_ty)
Type
res_ty
CoreExpr
core_map
CoreExpr
core_body,
CoreExpr -> DIdSet
exprFreeIdsDSet CoreExpr
core_binds forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty do_block :: HsCmd (GhcPass 'Typechecked)
do_block@(HsCmdDo XCmdDo (GhcPass 'Typechecked)
stmts_ty
(L SrcSpanAnnL
loc [GenLocated
SrcSpanAnnA
(StmtLR
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
stmts))
[Id]
env_ids = do
forall ann a. SrcSpanAnn' ann -> DsM a -> DsM a
putSrcSpanDsA SrcSpanAnnL
loc forall a b. (a -> b) -> a -> b
$
Type -> SDoc -> DsM ()
dsNoLevPoly XCmdDo (GhcPass 'Typechecked)
stmts_ty
(String -> SDoc
text String
"In the do-command:" SDoc -> SDoc -> SDoc
<+> forall a. Outputable a => a -> SDoc
ppr HsCmd (GhcPass 'Typechecked)
do_block)
(CoreExpr
core_stmts, DIdSet
env_ids') <- DsCmdEnv
-> VarSet
-> Type
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdDo DsCmdEnv
ids VarSet
local_vars Type
res_ty [GenLocated
SrcSpanAnnA
(StmtLR
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
stmts [Id]
env_ids
let env_ty :: Type
env_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
CoreExpr
core_fst <- Type -> Type -> DsM CoreExpr
mkFstExpr Type
env_ty Type
stack_ty
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids
(Type -> Type -> Type
mkCorePairTy Type
env_ty Type
stack_ty)
Type
env_ty
Type
res_ty
CoreExpr
core_fst
CoreExpr
core_stmts,
DIdSet
env_ids')
dsCmd DsCmdEnv
_ VarSet
local_vars Type
_stack_ty Type
_res_ty (HsCmdArrForm XCmdArrForm (GhcPass 'Typechecked)
_ LHsExpr (GhcPass 'Typechecked)
op LexicalFixity
_ Maybe Fixity
_ [LHsCmdTop (GhcPass 'Typechecked)]
args) [Id]
env_ids = do
let env_ty :: Type
env_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
CoreExpr
core_op <- LHsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsLExpr LHsExpr (GhcPass 'Typechecked)
op
([CoreExpr]
core_args, [DIdSet]
fv_sets) <- forall (m :: * -> *) a b c.
Applicative m =>
(a -> m (b, c)) -> [a] -> m ([b], [c])
mapAndUnzipM (VarSet
-> [Id]
-> LHsCmdTop (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet)
dsTrimCmdArg VarSet
local_vars [Id]
env_ids) [LHsCmdTop (GhcPass 'Typechecked)]
args
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. Expr b -> [Expr b] -> Expr b
mkApps (forall b. Expr b -> Expr b -> Expr b
App CoreExpr
core_op (forall b. Type -> Expr b
Type Type
env_ty)) [CoreExpr]
core_args,
[DIdSet] -> DIdSet
unionDVarSets [DIdSet]
fv_sets)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty (XCmd (HsWrap HsWrapper
wrap HsCmd (GhcPass 'Typechecked)
cmd)) [Id]
env_ids = do
(CoreExpr
core_cmd, DIdSet
env_ids') <- DsCmdEnv
-> VarSet
-> Type
-> Type
-> HsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmd DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty HsCmd (GhcPass 'Typechecked)
cmd [Id]
env_ids
CoreExpr -> CoreExpr
core_wrap <- HsWrapper -> DsM (CoreExpr -> CoreExpr)
dsHsWrapper HsWrapper
wrap
forall (m :: * -> *) a. Monad m => a -> m a
return (CoreExpr -> CoreExpr
core_wrap CoreExpr
core_cmd, DIdSet
env_ids')
dsCmd DsCmdEnv
_ VarSet
_ Type
_ Type
_ HsCmd (GhcPass 'Typechecked)
c [Id]
_ = forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"dsCmd" (forall a. Outputable a => a -> SDoc
ppr HsCmd (GhcPass 'Typechecked)
c)
dsTrimCmdArg
:: IdSet
-> [Id]
-> LHsCmdTop GhcTc
-> DsM (CoreExpr,
DIdSet)
dsTrimCmdArg :: VarSet
-> [Id]
-> LHsCmdTop (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet)
dsTrimCmdArg VarSet
local_vars [Id]
env_ids
(L SrcSpan
_ (HsCmdTop
(CmdTopTc Type
stack_ty Type
cmd_ty CmdSyntaxTable (GhcPass 'Typechecked)
ids) LHsCmd (GhcPass 'Typechecked)
cmd )) = do
([CoreBind]
meth_binds, DsCmdEnv
meth_ids) <- CmdSyntaxTable (GhcPass 'Typechecked) -> DsM ([CoreBind], DsCmdEnv)
mkCmdEnv CmdSyntaxTable (GhcPass 'Typechecked)
ids
(CoreExpr
core_cmd, DIdSet
free_vars, [Id]
env_ids')
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
meth_ids VarSet
local_vars Type
stack_ty Type
cmd_ty LHsCmd (GhcPass 'Typechecked)
cmd
Id
stack_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty
CoreExpr
trim_code
<- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id ([Id] -> Id -> CoreExpr
buildEnvStack [Id]
env_ids' Id
stack_id)
let
in_ty :: Type
in_ty = [Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty
in_ty' :: Type
in_ty' = [Id] -> Type -> Type
envStackType [Id]
env_ids' Type
stack_ty
arg_code :: CoreExpr
arg_code = if [Id]
env_ids' forall a. Eq a => a -> a -> Bool
== [Id]
env_ids then CoreExpr
core_cmd else
DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
meth_ids Type
in_ty Type
in_ty' Type
cmd_ty CoreExpr
trim_code CoreExpr
core_cmd
forall (m :: * -> *) a. Monad m => a -> m a
return (forall b. [Bind b] -> Expr b -> Expr b
mkLets [CoreBind]
meth_binds CoreExpr
arg_code, DIdSet
free_vars)
dsfixCmd
:: DsCmdEnv
-> IdSet
-> Type
-> Type
-> LHsCmd GhcTc
-> DsM (CoreExpr,
DIdSet,
[Id])
dsfixCmd :: DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars Type
stk_ty Type
cmd_ty LHsCmd (GhcPass 'Typechecked)
cmd
= do { forall a. SrcSpan -> DsM a -> DsM a
putSrcSpanDs (forall a e. GenLocated (SrcSpanAnn' a) e -> SrcSpan
getLocA LHsCmd (GhcPass 'Typechecked)
cmd) forall a b. (a -> b) -> a -> b
$ Type -> SDoc -> DsM ()
dsNoLevPoly Type
cmd_ty
(String -> SDoc
text String
"When desugaring the command:" SDoc -> SDoc -> SDoc
<+> forall a. Outputable a => a -> SDoc
ppr LHsCmd (GhcPass 'Typechecked)
cmd)
; ([Id] -> DsM (CoreExpr, DIdSet)) -> DsM (CoreExpr, DIdSet, [Id])
trimInput (DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsLCmd DsCmdEnv
ids VarSet
local_vars Type
stk_ty Type
cmd_ty LHsCmd (GhcPass 'Typechecked)
cmd) }
trimInput
:: ([Id] -> DsM (CoreExpr, DIdSet))
-> DsM (CoreExpr,
DIdSet,
[Id])
trimInput :: ([Id] -> DsM (CoreExpr, DIdSet)) -> DsM (CoreExpr, DIdSet, [Id])
trimInput [Id] -> DsM (CoreExpr, DIdSet)
build_arrow
= forall a. (a -> DsM a) -> DsM a
fixDs (\ ~(CoreExpr
_,DIdSet
_,[Id]
env_ids) -> do
(CoreExpr
core_cmd, DIdSet
free_vars) <- [Id] -> DsM (CoreExpr, DIdSet)
build_arrow [Id]
env_ids
forall (m :: * -> *) a. Monad m => a -> m a
return (CoreExpr
core_cmd, DIdSet
free_vars, DIdSet -> [Id]
dVarSetElems DIdSet
free_vars))
dsCmdLam :: DsCmdEnv
-> IdSet
-> Type
-> Type
-> [LPat GhcTc]
-> LHsCmd GhcTc
-> [Id]
-> DsM (CoreExpr,
DIdSet)
dsCmdLam :: DsCmdEnv
-> VarSet
-> Type
-> Type
-> [LPat (GhcPass 'Typechecked)]
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLam DsCmdEnv
ids VarSet
local_vars Type
stack_ty Type
res_ty [LPat (GhcPass 'Typechecked)]
pats LHsCmd (GhcPass 'Typechecked)
body [Id]
env_ids = do
let pat_vars :: VarSet
pat_vars = [Id] -> VarSet
mkVarSet (forall p. CollectPass p => CollectFlag p -> [LPat p] -> [IdP p]
collectPatsBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders [LPat (GhcPass 'Typechecked)]
pats)
let local_vars' :: VarSet
local_vars' = VarSet
pat_vars VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
local_vars
([Type]
pat_tys, Type
stack_ty') = Int -> Type -> ([Type], Type)
splitTypeAt (forall (t :: * -> *) a. Foldable t => t a -> Int
length [LPat (GhcPass 'Typechecked)]
pats) Type
stack_ty
(CoreExpr
core_body, DIdSet
free_vars, [Id]
env_ids')
<- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars' Type
stack_ty' Type
res_ty LHsCmd (GhcPass 'Typechecked)
body
[Id]
param_ids <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (Type -> Type -> DsM Id
newSysLocalDsNoLP Type
Many) [Type]
pat_tys
Id
stack_id' <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
stack_ty'
let
core_expr :: CoreExpr
core_expr = [Id] -> Id -> CoreExpr
buildEnvStack [Id]
env_ids' Id
stack_id'
in_ty :: Type
in_ty = [Id] -> Type -> Type
envStackType [Id]
env_ids Type
stack_ty
in_ty' :: Type
in_ty' = [Id] -> Type -> Type
envStackType [Id]
env_ids' Type
stack_ty'
CoreExpr
fail_expr <- HsMatchContext GhcRn -> Type -> DsM CoreExpr
mkFailExpr (forall p. HsArrowMatchContext -> HsMatchContext p
ArrowMatchCtxt HsArrowMatchContext
KappaExpr) Type
in_ty'
CoreExpr
match_code <- [CoreExpr]
-> HsMatchContext GhcRn
-> [LPat (GhcPass 'Typechecked)]
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimplys (forall a b. (a -> b) -> [a] -> [b]
map forall b. Id -> Expr b
Var [Id]
param_ids) (forall p. HsArrowMatchContext -> HsMatchContext p
ArrowMatchCtxt HsArrowMatchContext
KappaExpr) [LPat (GhcPass 'Typechecked)]
pats CoreExpr
core_expr
CoreExpr
fail_expr
(Id
stack_id, CoreExpr
param_code) <- [Id] -> Id -> CoreExpr -> DsM (Id, CoreExpr)
matchVarStack [Id]
param_ids Id
stack_id' CoreExpr
match_code
CoreExpr
select_code <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env_ids Id
stack_id CoreExpr
param_code
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
in_ty Type
in_ty' Type
res_ty CoreExpr
select_code CoreExpr
core_body,
DIdSet
free_vars forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetMinusUniqSet` VarSet
pat_vars)
dsCmdDo :: DsCmdEnv
-> IdSet
-> Type
-> [CmdLStmt GhcTc]
-> [Id]
-> DsM (CoreExpr,
DIdSet)
dsCmdDo :: DsCmdEnv
-> VarSet
-> Type
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdDo DsCmdEnv
_ VarSet
_ Type
_ [] [Id]
_ = forall a. String -> a
panic String
"dsCmdDo"
dsCmdDo DsCmdEnv
ids VarSet
local_vars Type
res_ty [L SrcSpanAnnA
loc (LastStmt XLastStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked)))
_ GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
body Maybe Bool
_ SyntaxExpr (GhcPass 'Typechecked)
_)] [Id]
env_ids = do
forall ann a. SrcSpanAnn' ann -> DsM a -> DsM a
putSrcSpanDsA SrcSpanAnnA
loc forall a b. (a -> b) -> a -> b
$ Type -> SDoc -> DsM ()
dsNoLevPoly Type
res_ty
(String -> SDoc
text String
"In the command:" SDoc -> SDoc -> SDoc
<+> forall a. Outputable a => a -> SDoc
ppr GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
body)
(CoreExpr
core_body, DIdSet
env_ids') <- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsLCmd DsCmdEnv
ids VarSet
local_vars Type
unitTy Type
res_ty GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))
body [Id]
env_ids
let env_ty :: Type
env_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
Id
env_var <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
env_ty
let core_map :: CoreExpr
core_map = forall b. b -> Expr b -> Expr b
Lam Id
env_var (CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr (forall b. Id -> Expr b
Var Id
env_var) CoreExpr
mkCoreUnitExpr)
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids
Type
env_ty
(Type -> Type -> Type
mkCorePairTy Type
env_ty Type
unitTy)
Type
res_ty
CoreExpr
core_map
CoreExpr
core_body,
DIdSet
env_ids')
dsCmdDo DsCmdEnv
ids VarSet
local_vars Type
res_ty (CmdLStmt (GhcPass 'Typechecked)
stmt:[CmdLStmt (GhcPass 'Typechecked)]
stmts) [Id]
env_ids = do
let bound_vars :: VarSet
bound_vars = [Id] -> VarSet
mkVarSet (forall (idL :: Pass) (idR :: Pass) body.
CollectPass (GhcPass idL) =>
CollectFlag (GhcPass idL)
-> LStmtLR (GhcPass idL) (GhcPass idR) body -> [IdP (GhcPass idL)]
collectLStmtBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders CmdLStmt (GhcPass 'Typechecked)
stmt)
let local_vars' :: VarSet
local_vars' = VarSet
bound_vars VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
local_vars
(CoreExpr
core_stmts, DIdSet
_, [Id]
env_ids') <- ([Id] -> DsM (CoreExpr, DIdSet)) -> DsM (CoreExpr, DIdSet, [Id])
trimInput (DsCmdEnv
-> VarSet
-> Type
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdDo DsCmdEnv
ids VarSet
local_vars' Type
res_ty [CmdLStmt (GhcPass 'Typechecked)]
stmts)
(CoreExpr
core_stmt, DIdSet
fv_stmt) <- DsCmdEnv
-> VarSet
-> [Id]
-> CmdLStmt (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLStmt DsCmdEnv
ids VarSet
local_vars [Id]
env_ids' CmdLStmt (GhcPass 'Typechecked)
stmt [Id]
env_ids
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids
([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids)
([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids')
Type
res_ty
CoreExpr
core_stmt
CoreExpr
core_stmts,
DIdSet
fv_stmt)
dsCmdLStmt :: DsCmdEnv -> IdSet -> [Id] -> CmdLStmt GhcTc -> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLStmt :: DsCmdEnv
-> VarSet
-> [Id]
-> CmdLStmt (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids CmdLStmt (GhcPass 'Typechecked)
cmd [Id]
env_ids
= DsCmdEnv
-> VarSet
-> [Id]
-> CmdStmt (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids (forall l e. GenLocated l e -> e
unLoc CmdLStmt (GhcPass 'Typechecked)
cmd) [Id]
env_ids
dsCmdStmt
:: DsCmdEnv
-> IdSet
-> [Id]
-> CmdStmt GhcTc
-> [Id]
-> DsM (CoreExpr,
DIdSet)
dsCmdStmt :: DsCmdEnv
-> VarSet
-> [Id]
-> CmdStmt (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids (BodyStmt XBodyStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
c_ty LHsCmd (GhcPass 'Typechecked)
cmd SyntaxExpr (GhcPass 'Typechecked)
_ SyntaxExpr (GhcPass 'Typechecked)
_) [Id]
env_ids = do
(CoreExpr
core_cmd, DIdSet
fv_cmd, [Id]
env_ids1) <- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars Type
unitTy XBodyStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
c_ty LHsCmd (GhcPass 'Typechecked)
cmd
CoreExpr
core_mux <- [Id] -> CoreExpr -> DsM CoreExpr
matchEnv [Id]
env_ids
(CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr
(CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env_ids1) CoreExpr
mkCoreUnitExpr)
([Id] -> CoreExpr
mkBigCoreVarTup [Id]
out_ids))
let
in_ty :: Type
in_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
in_ty1 :: Type
in_ty1 = Type -> Type -> Type
mkCorePairTy ([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids1) Type
unitTy
out_ty :: Type
out_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
out_ids
before_c_ty :: Type
before_c_ty = Type -> Type -> Type
mkCorePairTy Type
in_ty1 Type
out_ty
after_c_ty :: Type
after_c_ty = Type -> Type -> Type
mkCorePairTy XBodyStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
c_ty Type
out_ty
Type -> SDoc -> DsM ()
dsNoLevPoly XBodyStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
c_ty SDoc
empty
CoreExpr
snd_fn <- Type -> Type -> DsM CoreExpr
mkSndExpr XBodyStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
c_ty Type
out_ty
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
in_ty Type
before_c_ty Type
out_ty CoreExpr
core_mux forall a b. (a -> b) -> a -> b
$
DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids Type
before_c_ty Type
after_c_ty Type
out_ty
(DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_first DsCmdEnv
ids Type
in_ty1 XBodyStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
c_ty Type
out_ty CoreExpr
core_cmd) forall a b. (a -> b) -> a -> b
$
DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids Type
after_c_ty Type
out_ty CoreExpr
snd_fn,
DIdSet -> [Id] -> DIdSet
extendDVarSetList DIdSet
fv_cmd [Id]
out_ids)
dsCmdStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids (BindStmt XBindStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
_ LPat (GhcPass 'Typechecked)
pat LHsCmd (GhcPass 'Typechecked)
cmd) [Id]
env_ids = do
let pat_ty :: Type
pat_ty = LPat (GhcPass 'Typechecked) -> Type
hsLPatType LPat (GhcPass 'Typechecked)
pat
(CoreExpr
core_cmd, DIdSet
fv_cmd, [Id]
env_ids1) <- DsCmdEnv
-> VarSet
-> Type
-> Type
-> LHsCmd (GhcPass 'Typechecked)
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmd DsCmdEnv
ids VarSet
local_vars Type
unitTy Type
pat_ty LHsCmd (GhcPass 'Typechecked)
cmd
let pat_vars :: VarSet
pat_vars = [Id] -> VarSet
mkVarSet (forall p. CollectPass p => CollectFlag p -> LPat p -> [IdP p]
collectPatBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders LPat (GhcPass 'Typechecked)
pat)
let
env_ids2 :: [Id]
env_ids2 = forall a. (a -> Bool) -> [a] -> [a]
filterOut (Id -> VarSet -> Bool
`elemVarSet` VarSet
pat_vars) [Id]
out_ids
env_ty2 :: Type
env_ty2 = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids2
CoreExpr
core_mux <- [Id] -> CoreExpr -> DsM CoreExpr
matchEnv [Id]
env_ids
(CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr
(CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env_ids1) CoreExpr
mkCoreUnitExpr)
([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env_ids2))
Id
env_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
env_ty2
UniqSupply
uniqs <- forall gbl lcl. TcRnIf gbl lcl UniqSupply
newUniqueSupply
let
after_c_ty :: Type
after_c_ty = Type -> Type -> Type
mkCorePairTy Type
pat_ty Type
env_ty2
out_ty :: Type
out_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
out_ids
body_expr :: CoreExpr
body_expr = UniqSupply -> Id -> [Id] -> CoreExpr -> CoreExpr
coreCaseTuple UniqSupply
uniqs Id
env_id [Id]
env_ids2 ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
out_ids)
CoreExpr
fail_expr <- HsMatchContext GhcRn -> Type -> DsM CoreExpr
mkFailExpr (forall p. HsStmtContext p -> HsMatchContext p
StmtCtxt (forall p. Maybe ModuleName -> HsStmtContext p
DoExpr forall a. Maybe a
Nothing)) Type
out_ty
Id
pat_id <- Type -> LPat (GhcPass 'Typechecked) -> DsM Id
selectSimpleMatchVarL Type
Many LPat (GhcPass 'Typechecked)
pat
CoreExpr
match_code
<- CoreExpr
-> HsMatchContext GhcRn
-> LPat (GhcPass 'Typechecked)
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimply (forall b. Id -> Expr b
Var Id
pat_id) (forall p. HsStmtContext p -> HsMatchContext p
StmtCtxt (forall p. Maybe ModuleName -> HsStmtContext p
DoExpr forall a. Maybe a
Nothing)) LPat (GhcPass 'Typechecked)
pat CoreExpr
body_expr CoreExpr
fail_expr
Id
pair_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
after_c_ty
let
proj_expr :: CoreExpr
proj_expr = forall b. b -> Expr b -> Expr b
Lam Id
pair_id (Id -> Id -> Id -> CoreExpr -> CoreExpr
coreCasePair Id
pair_id Id
pat_id Id
env_id CoreExpr
match_code)
let
in_ty :: Type
in_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
in_ty1 :: Type
in_ty1 = Type -> Type -> Type
mkCorePairTy ([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids1) Type
unitTy
in_ty2 :: Type
in_ty2 = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids2
before_c_ty :: Type
before_c_ty = Type -> Type -> Type
mkCorePairTy Type
in_ty1 Type
in_ty2
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
in_ty Type
before_c_ty Type
out_ty CoreExpr
core_mux forall a b. (a -> b) -> a -> b
$
DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids Type
before_c_ty Type
after_c_ty Type
out_ty
(DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_first DsCmdEnv
ids Type
in_ty1 Type
pat_ty Type
in_ty2 CoreExpr
core_cmd) forall a b. (a -> b) -> a -> b
$
DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids Type
after_c_ty Type
out_ty CoreExpr
proj_expr,
DIdSet
fv_cmd DIdSet -> DIdSet -> DIdSet
`unionDVarSet` ([Id] -> DIdSet
mkDVarSet [Id]
out_ids
forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetMinusUniqSet` VarSet
pat_vars))
dsCmdStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids (LetStmt XLetStmt
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(LHsCmd (GhcPass 'Typechecked))
_ HsLocalBinds (GhcPass 'Typechecked)
binds) [Id]
env_ids = do
CoreExpr
core_binds <- HsLocalBinds (GhcPass 'Typechecked) -> CoreExpr -> DsM CoreExpr
dsLocalBinds HsLocalBinds (GhcPass 'Typechecked)
binds ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
out_ids)
CoreExpr
core_map <- [Id] -> CoreExpr -> DsM CoreExpr
matchEnv [Id]
env_ids CoreExpr
core_binds
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids
([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids)
([Id] -> Type
mkBigCoreVarTupTy [Id]
out_ids)
CoreExpr
core_map,
CoreExpr -> DIdSet
exprFreeIdsDSet CoreExpr
core_binds forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetIntersectUniqSet` VarSet
local_vars)
dsCmdStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids
(RecStmt { recS_stmts :: forall idL idR body.
StmtLR idL idR body -> XRec idR [LStmtLR idL idR body]
recS_stmts = L SrcSpanAnnL
_ [GenLocated
SrcSpanAnnA
(StmtLR
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
stmts
, recS_later_ids :: forall idL idR body. StmtLR idL idR body -> [IdP idR]
recS_later_ids = [IdP (GhcPass 'Typechecked)]
later_ids, recS_rec_ids :: forall idL idR body. StmtLR idL idR body -> [IdP idR]
recS_rec_ids = [IdP (GhcPass 'Typechecked)]
rec_ids
, recS_ext :: forall idL idR body. StmtLR idL idR body -> XRecStmt idL idR body
recS_ext = RecStmtTc { recS_later_rets :: RecStmtTc -> [HsExpr (GhcPass 'Typechecked)]
recS_later_rets = [HsExpr (GhcPass 'Typechecked)]
later_rets
, recS_rec_rets :: RecStmtTc -> [HsExpr (GhcPass 'Typechecked)]
recS_rec_rets = [HsExpr (GhcPass 'Typechecked)]
rec_rets } })
[Id]
env_ids = do
let
later_ids_set :: VarSet
later_ids_set = [Id] -> VarSet
mkVarSet [IdP (GhcPass 'Typechecked)]
later_ids
env2_ids :: [Id]
env2_ids = forall a. (a -> Bool) -> [a] -> [a]
filterOut (Id -> VarSet -> Bool
`elemVarSet` VarSet
later_ids_set) [Id]
out_ids
env2_id_set :: DIdSet
env2_id_set = [Id] -> DIdSet
mkDVarSet [Id]
env2_ids
env2_ty :: Type
env2_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env2_ids
UniqSupply
uniqs <- forall gbl lcl. TcRnIf gbl lcl UniqSupply
newUniqueSupply
Id
env2_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
env2_ty
let
later_ty :: Type
later_ty = [Id] -> Type
mkBigCoreVarTupTy [IdP (GhcPass 'Typechecked)]
later_ids
post_pair_ty :: Type
post_pair_ty = Type -> Type -> Type
mkCorePairTy Type
later_ty Type
env2_ty
post_loop_body :: CoreExpr
post_loop_body = UniqSupply -> Id -> [Id] -> CoreExpr -> CoreExpr
coreCaseTuple UniqSupply
uniqs Id
env2_id [Id]
env2_ids ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
out_ids)
CoreExpr
post_loop_fn <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [IdP (GhcPass 'Typechecked)]
later_ids Id
env2_id CoreExpr
post_loop_body
(CoreExpr
core_loop, DIdSet
env1_id_set, [Id]
env1_ids)
<- DsCmdEnv
-> VarSet
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> [HsExpr (GhcPass 'Typechecked)]
-> [Id]
-> [HsExpr (GhcPass 'Typechecked)]
-> DsM (CoreExpr, DIdSet, [Id])
dsRecCmd DsCmdEnv
ids VarSet
local_vars [GenLocated
SrcSpanAnnA
(StmtLR
(GhcPass 'Typechecked)
(GhcPass 'Typechecked)
(GenLocated SrcSpanAnnA (HsCmd (GhcPass 'Typechecked))))]
stmts [IdP (GhcPass 'Typechecked)]
later_ids [HsExpr (GhcPass 'Typechecked)]
later_rets [IdP (GhcPass 'Typechecked)]
rec_ids [HsExpr (GhcPass 'Typechecked)]
rec_rets
let
env1_ty :: Type
env1_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env1_ids
pre_pair_ty :: Type
pre_pair_ty = Type -> Type -> Type
mkCorePairTy Type
env1_ty Type
env2_ty
pre_loop_body :: CoreExpr
pre_loop_body = CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr ([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env1_ids)
([Id] -> CoreExpr
mkBigCoreVarTup [Id]
env2_ids)
CoreExpr
pre_loop_fn <- [Id] -> CoreExpr -> DsM CoreExpr
matchEnv [Id]
env_ids CoreExpr
pre_loop_body
let
env_ty :: Type
env_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
out_ty :: Type
out_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
out_ids
core_body :: CoreExpr
core_body = DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
env_ty Type
pre_pair_ty Type
out_ty
CoreExpr
pre_loop_fn
(DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids Type
pre_pair_ty Type
post_pair_ty Type
out_ty
(DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_first DsCmdEnv
ids Type
env1_ty Type
later_ty Type
env2_ty
CoreExpr
core_loop)
(DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids Type
post_pair_ty Type
out_ty
CoreExpr
post_loop_fn))
forall (m :: * -> *) a. Monad m => a -> m a
return (CoreExpr
core_body, DIdSet
env1_id_set DIdSet -> DIdSet -> DIdSet
`unionDVarSet` DIdSet
env2_id_set)
dsCmdStmt DsCmdEnv
_ VarSet
_ [Id]
_ CmdStmt (GhcPass 'Typechecked)
_ [Id]
s = forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"dsCmdStmt" (forall a. Outputable a => a -> SDoc
ppr [Id]
s)
dsRecCmd
:: DsCmdEnv
-> IdSet
-> [CmdLStmt GhcTc]
-> [Id]
-> [HsExpr GhcTc]
-> [Id]
-> [HsExpr GhcTc]
-> DsM (CoreExpr,
DIdSet,
[Id])
dsRecCmd :: DsCmdEnv
-> VarSet
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> [HsExpr (GhcPass 'Typechecked)]
-> [Id]
-> [HsExpr (GhcPass 'Typechecked)]
-> DsM (CoreExpr, DIdSet, [Id])
dsRecCmd DsCmdEnv
ids VarSet
local_vars [CmdLStmt (GhcPass 'Typechecked)]
stmts [Id]
later_ids [HsExpr (GhcPass 'Typechecked)]
later_rets [Id]
rec_ids [HsExpr (GhcPass 'Typechecked)]
rec_rets = do
let
later_id_set :: VarSet
later_id_set = [Id] -> VarSet
mkVarSet [Id]
later_ids
rec_id_set :: VarSet
rec_id_set = [Id] -> VarSet
mkVarSet [Id]
rec_ids
local_vars' :: VarSet
local_vars' = VarSet
rec_id_set VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
later_id_set VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
local_vars
[CoreExpr]
core_later_rets <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM HsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsExpr [HsExpr (GhcPass 'Typechecked)]
later_rets
[CoreExpr]
core_rec_rets <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM HsExpr (GhcPass 'Typechecked) -> DsM CoreExpr
dsExpr [HsExpr (GhcPass 'Typechecked)]
rec_rets
let
out_ids :: [Id]
out_ids = [CoreExpr] -> [Id]
exprsFreeIdsList ([CoreExpr]
core_later_rets forall a. [a] -> [a] -> [a]
++ [CoreExpr]
core_rec_rets)
out_ty :: Type
out_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
out_ids
later_tuple :: CoreExpr
later_tuple = [CoreExpr] -> CoreExpr
mkBigCoreTup [CoreExpr]
core_later_rets
later_ty :: Type
later_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
later_ids
rec_tuple :: CoreExpr
rec_tuple = [CoreExpr] -> CoreExpr
mkBigCoreTup [CoreExpr]
core_rec_rets
rec_ty :: Type
rec_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
rec_ids
out_pair :: CoreExpr
out_pair = CoreExpr -> CoreExpr -> CoreExpr
mkCorePairExpr CoreExpr
later_tuple CoreExpr
rec_tuple
out_pair_ty :: Type
out_pair_ty = Type -> Type -> Type
mkCorePairTy Type
later_ty Type
rec_ty
CoreExpr
mk_pair_fn <- [Id] -> CoreExpr -> DsM CoreExpr
matchEnv [Id]
out_ids CoreExpr
out_pair
(CoreExpr
core_stmts, DIdSet
fv_stmts, [Id]
env_ids) <- DsCmdEnv
-> VarSet
-> [Id]
-> [CmdLStmt (GhcPass 'Typechecked)]
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmdStmts DsCmdEnv
ids VarSet
local_vars' [Id]
out_ids [CmdLStmt (GhcPass 'Typechecked)]
stmts
Id
rec_id <- Type -> Type -> DsM Id
newSysLocalDs Type
Many Type
rec_ty
let
env1_id_set :: DIdSet
env1_id_set = DIdSet
fv_stmts forall a. UniqDSet a -> UniqSet a -> UniqDSet a
`uniqDSetMinusUniqSet` VarSet
rec_id_set
env1_ids :: [Id]
env1_ids = DIdSet -> [Id]
dVarSetElems DIdSet
env1_id_set
env1_ty :: Type
env1_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env1_ids
in_pair_ty :: Type
in_pair_ty = Type -> Type -> Type
mkCorePairTy Type
env1_ty Type
rec_ty
core_body :: CoreExpr
core_body = [CoreExpr] -> CoreExpr
mkBigCoreTup (forall a b. (a -> b) -> [a] -> [b]
map Id -> CoreExpr
selectVar [Id]
env_ids)
where
selectVar :: Id -> CoreExpr
selectVar Id
v
| Id
v Id -> VarSet -> Bool
`elemVarSet` VarSet
rec_id_set
= [Id] -> Id -> Id -> CoreExpr -> CoreExpr
mkTupleSelector [Id]
rec_ids Id
v Id
rec_id (forall b. Id -> Expr b
Var Id
rec_id)
| Bool
otherwise = forall b. Id -> Expr b
Var Id
v
CoreExpr
squash_pair_fn <- [Id] -> Id -> CoreExpr -> DsM CoreExpr
matchEnvStack [Id]
env1_ids Id
rec_id CoreExpr
core_body
let
env_ty :: Type
env_ty = [Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids
core_loop :: CoreExpr
core_loop = DsCmdEnv -> Type -> Type -> Type -> CoreExpr -> CoreExpr
do_loop DsCmdEnv
ids Type
env1_ty Type
later_ty Type
rec_ty
(DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_premap DsCmdEnv
ids Type
in_pair_ty Type
env_ty Type
out_pair_ty
CoreExpr
squash_pair_fn
(DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids Type
env_ty Type
out_ty Type
out_pair_ty
CoreExpr
core_stmts
(DsCmdEnv -> Type -> Type -> CoreExpr -> CoreExpr
do_arr DsCmdEnv
ids Type
out_ty Type
out_pair_ty CoreExpr
mk_pair_fn)))
forall (m :: * -> *) a. Monad m => a -> m a
return (CoreExpr
core_loop, DIdSet
env1_id_set, [Id]
env1_ids)
dsfixCmdStmts
:: DsCmdEnv
-> IdSet
-> [Id]
-> [CmdLStmt GhcTc]
-> DsM (CoreExpr,
DIdSet,
[Id])
dsfixCmdStmts :: DsCmdEnv
-> VarSet
-> [Id]
-> [CmdLStmt (GhcPass 'Typechecked)]
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmdStmts DsCmdEnv
ids VarSet
local_vars [Id]
out_ids [CmdLStmt (GhcPass 'Typechecked)]
stmts
= ([Id] -> DsM (CoreExpr, DIdSet)) -> DsM (CoreExpr, DIdSet, [Id])
trimInput (DsCmdEnv
-> VarSet
-> [Id]
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdStmts DsCmdEnv
ids VarSet
local_vars [Id]
out_ids [CmdLStmt (GhcPass 'Typechecked)]
stmts)
dsCmdStmts
:: DsCmdEnv
-> IdSet
-> [Id]
-> [CmdLStmt GhcTc]
-> [Id]
-> DsM (CoreExpr,
DIdSet)
dsCmdStmts :: DsCmdEnv
-> VarSet
-> [Id]
-> [CmdLStmt (GhcPass 'Typechecked)]
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdStmts DsCmdEnv
ids VarSet
local_vars [Id]
out_ids [CmdLStmt (GhcPass 'Typechecked)
stmt] [Id]
env_ids
= DsCmdEnv
-> VarSet
-> [Id]
-> CmdLStmt (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLStmt DsCmdEnv
ids VarSet
local_vars [Id]
out_ids CmdLStmt (GhcPass 'Typechecked)
stmt [Id]
env_ids
dsCmdStmts DsCmdEnv
ids VarSet
local_vars [Id]
out_ids (CmdLStmt (GhcPass 'Typechecked)
stmt:[CmdLStmt (GhcPass 'Typechecked)]
stmts) [Id]
env_ids = do
let bound_vars :: VarSet
bound_vars = [Id] -> VarSet
mkVarSet (forall (idL :: Pass) (idR :: Pass) body.
CollectPass (GhcPass idL) =>
CollectFlag (GhcPass idL)
-> LStmtLR (GhcPass idL) (GhcPass idR) body -> [IdP (GhcPass idL)]
collectLStmtBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders CmdLStmt (GhcPass 'Typechecked)
stmt)
let local_vars' :: VarSet
local_vars' = VarSet
bound_vars VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
local_vars
(CoreExpr
core_stmts, DIdSet
_fv_stmts, [Id]
env_ids') <- DsCmdEnv
-> VarSet
-> [Id]
-> [CmdLStmt (GhcPass 'Typechecked)]
-> DsM (CoreExpr, DIdSet, [Id])
dsfixCmdStmts DsCmdEnv
ids VarSet
local_vars' [Id]
out_ids [CmdLStmt (GhcPass 'Typechecked)]
stmts
(CoreExpr
core_stmt, DIdSet
fv_stmt) <- DsCmdEnv
-> VarSet
-> [Id]
-> CmdLStmt (GhcPass 'Typechecked)
-> [Id]
-> DsM (CoreExpr, DIdSet)
dsCmdLStmt DsCmdEnv
ids VarSet
local_vars [Id]
env_ids' CmdLStmt (GhcPass 'Typechecked)
stmt [Id]
env_ids
forall (m :: * -> *) a. Monad m => a -> m a
return (DsCmdEnv
-> Type -> Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr
do_compose DsCmdEnv
ids
([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids)
([Id] -> Type
mkBigCoreVarTupTy [Id]
env_ids')
([Id] -> Type
mkBigCoreVarTupTy [Id]
out_ids)
CoreExpr
core_stmt
CoreExpr
core_stmts,
DIdSet
fv_stmt)
dsCmdStmts DsCmdEnv
_ VarSet
_ [Id]
_ [] [Id]
_ = forall a. String -> a
panic String
"dsCmdStmts []"
matchSimplys :: [CoreExpr]
-> HsMatchContext GhcRn
-> [LPat GhcTc]
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimplys :: [CoreExpr]
-> HsMatchContext GhcRn
-> [LPat (GhcPass 'Typechecked)]
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimplys [] HsMatchContext GhcRn
_ctxt [] CoreExpr
result_expr CoreExpr
_fail_expr = forall (m :: * -> *) a. Monad m => a -> m a
return CoreExpr
result_expr
matchSimplys (CoreExpr
exp:[CoreExpr]
exps) HsMatchContext GhcRn
ctxt (LPat (GhcPass 'Typechecked)
pat:[LPat (GhcPass 'Typechecked)]
pats) CoreExpr
result_expr CoreExpr
fail_expr = do
CoreExpr
match_code <- [CoreExpr]
-> HsMatchContext GhcRn
-> [LPat (GhcPass 'Typechecked)]
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimplys [CoreExpr]
exps HsMatchContext GhcRn
ctxt [LPat (GhcPass 'Typechecked)]
pats CoreExpr
result_expr CoreExpr
fail_expr
CoreExpr
-> HsMatchContext GhcRn
-> LPat (GhcPass 'Typechecked)
-> CoreExpr
-> CoreExpr
-> DsM CoreExpr
matchSimply CoreExpr
exp HsMatchContext GhcRn
ctxt LPat (GhcPass 'Typechecked)
pat CoreExpr
match_code CoreExpr
fail_expr
matchSimplys [CoreExpr]
_ HsMatchContext GhcRn
_ [LPat (GhcPass 'Typechecked)]
_ CoreExpr
_ CoreExpr
_ = forall a. String -> a
panic String
"matchSimplys"
leavesMatch :: LMatch GhcTc (LocatedA (body GhcTc))
-> [(LocatedA (body GhcTc), IdSet)]
leavesMatch :: forall (body :: * -> *).
LMatch
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
-> [(LocatedA (body (GhcPass 'Typechecked)), VarSet)]
leavesMatch (L Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked))))
_ (Match { m_pats :: forall p body. Match p body -> [LPat p]
m_pats = [LPat (GhcPass 'Typechecked)]
pats
, m_grhss :: forall p body. Match p body -> GRHSs p body
m_grhss = GRHSs XCGRHSs
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
_ [LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))]
grhss HsLocalBinds (GhcPass 'Typechecked)
binds }))
= let
defined_vars :: VarSet
defined_vars = [Id] -> VarSet
mkVarSet (forall p. CollectPass p => CollectFlag p -> [LPat p] -> [IdP p]
collectPatsBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders [LPat (GhcPass 'Typechecked)]
pats)
VarSet -> VarSet -> VarSet
`unionVarSet`
[Id] -> VarSet
mkVarSet (forall (idL :: Pass) (idR :: Pass).
CollectPass (GhcPass idL) =>
CollectFlag (GhcPass idL)
-> HsLocalBindsLR (GhcPass idL) (GhcPass idR)
-> [IdP (GhcPass idL)]
collectLocalBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders HsLocalBinds (GhcPass 'Typechecked)
binds)
in
[(LocatedA (body (GhcPass 'Typechecked))
body,
[Id] -> VarSet
mkVarSet (forall (idL :: Pass) (idR :: Pass) body.
CollectPass (GhcPass idL) =>
CollectFlag (GhcPass idL)
-> [LStmtLR (GhcPass idL) (GhcPass idR) body]
-> [IdP (GhcPass idL)]
collectLStmtsBinders CollectFlag (GhcPass 'Typechecked)
CollWithDictBinders [GuardLStmt (GhcPass 'Typechecked)]
stmts)
VarSet -> VarSet -> VarSet
`unionVarSet` VarSet
defined_vars)
| L Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked))))
_ (GRHS XCGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
_ [GuardLStmt (GhcPass 'Typechecked)]
stmts LocatedA (body (GhcPass 'Typechecked))
body) <- [LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))]
grhss]
replaceLeavesMatch
:: ( Anno (Match GhcTc (LocatedA (body' GhcTc))) ~ Anno (Match GhcTc (LocatedA (body GhcTc)))
, Anno (GRHS GhcTc (LocatedA (body' GhcTc))) ~ Anno (GRHS GhcTc (LocatedA (body GhcTc))))
=> Type
-> [LocatedA (body' GhcTc)]
-> LMatch GhcTc (LocatedA (body GhcTc))
-> ([LocatedA (body' GhcTc)],
LMatch GhcTc (LocatedA (body' GhcTc)))
replaceLeavesMatch :: forall (body' :: * -> *) (body :: * -> *).
(Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))),
Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(GRHS
(GhcPass 'Typechecked)
(LocatedA (body (GhcPass 'Typechecked))))) =>
Type
-> [LocatedA (body' (GhcPass 'Typechecked))]
-> LMatch
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
-> ([LocatedA (body' (GhcPass 'Typechecked))],
LMatch
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
replaceLeavesMatch Type
_res_ty [LocatedA (body' (GhcPass 'Typechecked))]
leaves
(L Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked))))
loc
match :: Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
match@(Match { m_grhss :: forall p body. Match p body -> GRHSs p body
m_grhss = GRHSs XCGRHSs
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
x [LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))]
grhss HsLocalBinds (GhcPass 'Typechecked)
binds }))
= let
([LocatedA (body' (GhcPass 'Typechecked))]
leaves', [GenLocated
(Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))))
(GRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))]
grhss') = forall (t :: * -> *) s a b.
Traversable t =>
(s -> a -> (s, b)) -> s -> t a -> (s, t b)
mapAccumL forall (body' :: * -> *) (body :: * -> *).
(Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))),
Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(GRHS
(GhcPass 'Typechecked)
(LocatedA (body (GhcPass 'Typechecked))))) =>
[LocatedA (body' (GhcPass 'Typechecked))]
-> LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
-> ([LocatedA (body' (GhcPass 'Typechecked))],
LGRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
replaceLeavesGRHS [LocatedA (body' (GhcPass 'Typechecked))]
leaves [LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))]
grhss
in
([LocatedA (body' (GhcPass 'Typechecked))]
leaves', forall l e. l -> e -> GenLocated l e
L Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked))))
loc (Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
match { m_ext :: XCMatch
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked)))
m_ext = forall a. EpAnn a
noAnn, m_grhss :: GRHSs
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked)))
m_grhss = forall p body.
XCGRHSs p body -> [LGRHS p body] -> HsLocalBinds p -> GRHSs p body
GRHSs XCGRHSs
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
x [GenLocated
(Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))))
(GRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))]
grhss' HsLocalBinds (GhcPass 'Typechecked)
binds }))
replaceLeavesGRHS
:: ( Anno (Match GhcTc (LocatedA (body' GhcTc))) ~ Anno (Match GhcTc (LocatedA (body GhcTc)))
, Anno (GRHS GhcTc (LocatedA (body' GhcTc))) ~ Anno (GRHS GhcTc (LocatedA (body GhcTc))))
=> [LocatedA (body' GhcTc)]
-> LGRHS GhcTc (LocatedA (body GhcTc))
-> ([LocatedA (body' GhcTc)],
LGRHS GhcTc (LocatedA (body' GhcTc)))
replaceLeavesGRHS :: forall (body' :: * -> *) (body :: * -> *).
(Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(Match
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))),
Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
~ Anno
(GRHS
(GhcPass 'Typechecked)
(LocatedA (body (GhcPass 'Typechecked))))) =>
[LocatedA (body' (GhcPass 'Typechecked))]
-> LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
-> ([LocatedA (body' (GhcPass 'Typechecked))],
LGRHS
(GhcPass 'Typechecked) (LocatedA (body' (GhcPass 'Typechecked))))
replaceLeavesGRHS (LocatedA (body' (GhcPass 'Typechecked))
leaf:[LocatedA (body' (GhcPass 'Typechecked))]
leaves) (L Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked))))
loc (GRHS XCGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
x [GuardLStmt (GhcPass 'Typechecked)]
stmts LocatedA (body (GhcPass 'Typechecked))
_))
= ([LocatedA (body' (GhcPass 'Typechecked))]
leaves, forall l e. l -> e -> GenLocated l e
L Anno
(GRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked))))
loc (forall p body.
XCGRHS p body -> [GuardLStmt p] -> body -> GRHS p body
GRHS XCGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
x [GuardLStmt (GhcPass 'Typechecked)]
stmts LocatedA (body' (GhcPass 'Typechecked))
leaf))
replaceLeavesGRHS [] LGRHS
(GhcPass 'Typechecked) (LocatedA (body (GhcPass 'Typechecked)))
_ = forall a. String -> a
panic String
"replaceLeavesGRHS []"
foldb :: (a -> a -> a) -> [a] -> a
foldb :: forall a. (a -> a -> a) -> [a] -> a
foldb a -> a -> a
_ [] = forall a. HasCallStack => String -> a
error String
"foldb of empty list"
foldb a -> a -> a
_ [a
x] = a
x
foldb a -> a -> a
f [a]
xs = forall a. (a -> a -> a) -> [a] -> a
foldb a -> a -> a
f ([a] -> [a]
fold_pairs [a]
xs)
where
fold_pairs :: [a] -> [a]
fold_pairs [] = []
fold_pairs [a
x] = [a
x]
fold_pairs (a
x1:a
x2:[a]
xs) = a -> a -> a
f a
x1 a
x2forall a. a -> [a] -> [a]
:[a] -> [a]
fold_pairs [a]
xs