{-# LANGUAGE FlexibleContexts #-}
module Futhark.Internalise.Lambdas
  ( InternaliseLambda
  , internaliseMapLambda
  , internaliseStreamMapLambda
  , internaliseFoldLambda
  , internaliseStreamLambda
  , internalisePartitionLambda
  )
  where

import Language.Futhark as E
import Futhark.IR.SOACS as I
import Futhark.MonadFreshNames
import Futhark.Internalise.Monad
import Futhark.Internalise.AccurateSizes

-- | A function for internalising lambdas.
type InternaliseLambda =
  E.Exp -> [I.Type] -> InternaliseM ([I.LParam], I.Body, [I.ExtType])

internaliseMapLambda :: InternaliseLambda
                     -> E.Exp
                     -> [I.SubExp]
                     -> InternaliseM I.Lambda
internaliseMapLambda :: InternaliseLambda -> Exp -> [SubExp] -> InternaliseM Lambda
internaliseMapLambda InternaliseLambda
internaliseLambda Exp
lam [SubExp]
args = do
  [Type]
argtypes <- (SubExp -> InternaliseM Type) -> [SubExp] -> InternaliseM [Type]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM SubExp -> InternaliseM Type
forall t (m :: * -> *). HasScope t m => SubExp -> m Type
I.subExpType [SubExp]
args
  let rowtypes :: [Type]
rowtypes = (Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map Type -> Type
forall shape u.
ArrayShape shape =>
TypeBase shape u -> TypeBase shape u
I.rowType [Type]
argtypes
  ([Param Type]
params, Body
body, [TypeBase ExtShape NoUniqueness]
rettype) <- InternaliseLambda
internaliseLambda Exp
lam [Type]
rowtypes
  ([Type]
rettype', [Ident]
_) <- [TypeBase ExtShape NoUniqueness] -> InternaliseM ([Type], [Ident])
forall (m :: * -> *) u.
MonadFreshNames m =>
[TypeBase ExtShape u] -> m ([TypeBase Shape u], [Ident])
instantiateShapes' [TypeBase ExtShape NoUniqueness]
rettype
  Body
body' <- Scope SOACS -> InternaliseM Body -> InternaliseM Body
forall lore (m :: * -> *) a.
LocalScope lore m =>
Scope lore -> m a -> m a
localScope ([Param Type] -> Scope SOACS
forall lore dec.
(LParamInfo lore ~ dec) =>
[Param dec] -> Scope lore
scopeOfLParams [Param Type]
params) (InternaliseM Body -> InternaliseM Body)
-> InternaliseM Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$
           ErrorMsg SubExp -> SrcLoc -> [Type] -> Body -> InternaliseM Body
ensureResultShape
           ([ErrorMsgPart SubExp] -> ErrorMsg SubExp
forall a. [ErrorMsgPart a] -> ErrorMsg a
ErrorMsg [String -> ErrorMsgPart SubExp
forall a. String -> ErrorMsgPart a
ErrorString String
"not all iterations produce same shape"])
           (Exp -> SrcLoc
forall a. Located a => a -> SrcLoc
srclocOf Exp
lam) [Type]
rettype' Body
body
  Lambda -> InternaliseM Lambda
forall (m :: * -> *) a. Monad m => a -> m a
return (Lambda -> InternaliseM Lambda) -> Lambda -> InternaliseM Lambda
forall a b. (a -> b) -> a -> b
$ [LParam SOACS] -> Body -> [Type] -> Lambda
forall lore. [LParam lore] -> BodyT lore -> [Type] -> LambdaT lore
I.Lambda [Param Type]
[LParam SOACS]
params Body
body' [Type]
rettype'

internaliseStreamMapLambda :: InternaliseLambda
                           -> E.Exp
                           -> [I.SubExp]
                           -> InternaliseM I.Lambda
internaliseStreamMapLambda :: InternaliseLambda -> Exp -> [SubExp] -> InternaliseM Lambda
internaliseStreamMapLambda InternaliseLambda
internaliseLambda Exp
lam [SubExp]
args = do
  VName
chunk_size <- String -> InternaliseM VName
forall (m :: * -> *). MonadFreshNames m => String -> m VName
newVName String
"chunk_size"
  let chunk_param :: Param (TypeBase shape u)
chunk_param = VName -> TypeBase shape u -> Param (TypeBase shape u)
forall dec. VName -> dec -> Param dec
I.Param VName
chunk_size (PrimType -> TypeBase shape u
forall shape u. PrimType -> TypeBase shape u
I.Prim PrimType
int32)
      outer :: TypeBase Shape u -> TypeBase Shape u
outer = (TypeBase Shape u -> SubExp -> TypeBase Shape u
forall d u.
ArrayShape (ShapeBase d) =>
TypeBase (ShapeBase d) u -> d -> TypeBase (ShapeBase d) u
`setOuterSize` VName -> SubExp
I.Var VName
chunk_size)
  Scope SOACS -> InternaliseM Lambda -> InternaliseM Lambda
forall lore (m :: * -> *) a.
LocalScope lore m =>
Scope lore -> m a -> m a
localScope ([Param Type] -> Scope SOACS
forall lore dec.
(LParamInfo lore ~ dec) =>
[Param dec] -> Scope lore
scopeOfLParams [Param Type
forall shape u. Param (TypeBase shape u)
chunk_param]) (InternaliseM Lambda -> InternaliseM Lambda)
-> InternaliseM Lambda -> InternaliseM Lambda
forall a b. (a -> b) -> a -> b
$ do
    [Type]
argtypes <- (SubExp -> InternaliseM Type) -> [SubExp] -> InternaliseM [Type]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM SubExp -> InternaliseM Type
forall t (m :: * -> *). HasScope t m => SubExp -> m Type
I.subExpType [SubExp]
args
    ([Param Type]
lam_params, Body
orig_body, [TypeBase ExtShape NoUniqueness]
rettype) <-
      InternaliseLambda
internaliseLambda Exp
lam ([Type]
 -> InternaliseM
      ([LParam SOACS], Body, [TypeBase ExtShape NoUniqueness]))
-> [Type]
-> InternaliseM
     ([LParam SOACS], Body, [TypeBase ExtShape NoUniqueness])
forall a b. (a -> b) -> a -> b
$ PrimType -> Type
forall shape u. PrimType -> TypeBase shape u
I.Prim PrimType
int32 Type -> [Type] -> [Type]
forall a. a -> [a] -> [a]
: (Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map Type -> Type
forall u. TypeBase Shape u -> TypeBase Shape u
outer [Type]
argtypes
    let Param Type
orig_chunk_param : [Param Type]
params = [Param Type]
lam_params
    Body
body <- Binder SOACS Body -> InternaliseM Body
forall lore (m :: * -> *) somelore.
(Bindable lore, MonadFreshNames m, HasScope somelore m,
 SameScope somelore lore) =>
Binder lore (Body lore) -> m (Body lore)
runBodyBinder (Binder SOACS Body -> InternaliseM Body)
-> Binder SOACS Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$ do
      [VName]
-> Exp (Lore (BinderT SOACS (State VNameSource)))
-> BinderT SOACS (State VNameSource) ()
forall (m :: * -> *).
MonadBinder m =>
[VName] -> Exp (Lore m) -> m ()
letBindNames [Param Type -> VName
forall dec. Param dec -> VName
paramName Param Type
orig_chunk_param] (Exp (Lore (BinderT SOACS (State VNameSource)))
 -> BinderT SOACS (State VNameSource) ())
-> Exp (Lore (BinderT SOACS (State VNameSource)))
-> BinderT SOACS (State VNameSource) ()
forall a b. (a -> b) -> a -> b
$ BasicOp -> ExpT SOACS
forall lore. BasicOp -> ExpT lore
I.BasicOp (BasicOp -> ExpT SOACS) -> BasicOp -> ExpT SOACS
forall a b. (a -> b) -> a -> b
$ SubExp -> BasicOp
I.SubExp (SubExp -> BasicOp) -> SubExp -> BasicOp
forall a b. (a -> b) -> a -> b
$ VName -> SubExp
I.Var VName
chunk_size
      Body -> Binder SOACS Body
forall (m :: * -> *) a. Monad m => a -> m a
return Body
orig_body
    ([Type]
rettype', [Ident]
_) <- [TypeBase ExtShape NoUniqueness] -> InternaliseM ([Type], [Ident])
forall (m :: * -> *) u.
MonadFreshNames m =>
[TypeBase ExtShape u] -> m ([TypeBase Shape u], [Ident])
instantiateShapes' [TypeBase ExtShape NoUniqueness]
rettype
    Body
body' <- Scope SOACS -> InternaliseM Body -> InternaliseM Body
forall lore (m :: * -> *) a.
LocalScope lore m =>
Scope lore -> m a -> m a
localScope ([Param Type] -> Scope SOACS
forall lore dec.
(LParamInfo lore ~ dec) =>
[Param dec] -> Scope lore
scopeOfLParams [Param Type]
params) (InternaliseM Body -> InternaliseM Body)
-> InternaliseM Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$ InternaliseM (Body (Lore InternaliseM))
-> InternaliseM (Body (Lore InternaliseM))
forall (m :: * -> *).
MonadBinder m =>
m (Body (Lore m)) -> m (Body (Lore m))
insertStmsM (InternaliseM (Body (Lore InternaliseM))
 -> InternaliseM (Body (Lore InternaliseM)))
-> InternaliseM (Body (Lore InternaliseM))
-> InternaliseM (Body (Lore InternaliseM))
forall a b. (a -> b) -> a -> b
$ do
      [VName] -> Exp (Lore InternaliseM) -> InternaliseM ()
forall (m :: * -> *).
MonadBinder m =>
[VName] -> Exp (Lore m) -> m ()
letBindNames [Param Type -> VName
forall dec. Param dec -> VName
paramName Param Type
orig_chunk_param] (Exp (Lore InternaliseM) -> InternaliseM ())
-> Exp (Lore InternaliseM) -> InternaliseM ()
forall a b. (a -> b) -> a -> b
$ BasicOp -> ExpT SOACS
forall lore. BasicOp -> ExpT lore
I.BasicOp (BasicOp -> ExpT SOACS) -> BasicOp -> ExpT SOACS
forall a b. (a -> b) -> a -> b
$ SubExp -> BasicOp
I.SubExp (SubExp -> BasicOp) -> SubExp -> BasicOp
forall a b. (a -> b) -> a -> b
$ VName -> SubExp
I.Var VName
chunk_size
      ErrorMsg SubExp -> SrcLoc -> [Type] -> Body -> InternaliseM Body
ensureResultShape
        ([ErrorMsgPart SubExp] -> ErrorMsg SubExp
forall a. [ErrorMsgPart a] -> ErrorMsg a
ErrorMsg [String -> ErrorMsgPart SubExp
forall a. String -> ErrorMsgPart a
ErrorString String
"not all iterations produce same shape"])
        (Exp -> SrcLoc
forall a. Located a => a -> SrcLoc
srclocOf Exp
lam) ((Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map Type -> Type
forall u. TypeBase Shape u -> TypeBase Shape u
outer [Type]
rettype') Body
body
    Lambda -> InternaliseM Lambda
forall (m :: * -> *) a. Monad m => a -> m a
return (Lambda -> InternaliseM Lambda) -> Lambda -> InternaliseM Lambda
forall a b. (a -> b) -> a -> b
$ [LParam SOACS] -> Body -> [Type] -> Lambda
forall lore. [LParam lore] -> BodyT lore -> [Type] -> LambdaT lore
I.Lambda (Param Type
forall shape u. Param (TypeBase shape u)
chunk_paramParam Type -> [Param Type] -> [Param Type]
forall a. a -> [a] -> [a]
:[Param Type]
params) Body
body' ((Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map Type -> Type
forall u. TypeBase Shape u -> TypeBase Shape u
outer [Type]
rettype')

internaliseFoldLambda :: InternaliseLambda
                      -> E.Exp
                      -> [I.Type] -> [I.Type]
                      -> InternaliseM I.Lambda
internaliseFoldLambda :: InternaliseLambda -> Exp -> [Type] -> [Type] -> InternaliseM Lambda
internaliseFoldLambda InternaliseLambda
internaliseLambda Exp
lam [Type]
acctypes [Type]
arrtypes = do
  let rowtypes :: [Type]
rowtypes = (Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map Type -> Type
forall shape u.
ArrayShape shape =>
TypeBase shape u -> TypeBase shape u
I.rowType [Type]
arrtypes
  ([Param Type]
params, Body
body, [TypeBase ExtShape NoUniqueness]
rettype) <- InternaliseLambda
internaliseLambda Exp
lam ([Type]
 -> InternaliseM
      ([LParam SOACS], Body, [TypeBase ExtShape NoUniqueness]))
-> [Type]
-> InternaliseM
     ([LParam SOACS], Body, [TypeBase ExtShape NoUniqueness])
forall a b. (a -> b) -> a -> b
$ [Type]
acctypes [Type] -> [Type] -> [Type]
forall a. [a] -> [a] -> [a]
++ [Type]
rowtypes
  let rettype' :: [Type]
rettype' = [ TypeBase ExtShape NoUniqueness
t TypeBase ExtShape NoUniqueness -> Shape -> Type
forall newshape oldshape u.
ArrayShape newshape =>
TypeBase oldshape u -> newshape -> TypeBase newshape u
`I.setArrayShape` Type -> Shape
forall shape u. ArrayShape shape => TypeBase shape u -> shape
I.arrayShape Type
shape
                   | (TypeBase ExtShape NoUniqueness
t,Type
shape) <- [TypeBase ExtShape NoUniqueness]
-> [Type] -> [(TypeBase ExtShape NoUniqueness, Type)]
forall a b. [a] -> [b] -> [(a, b)]
zip [TypeBase ExtShape NoUniqueness]
rettype [Type]
acctypes ]
  -- The result of the body must have the exact same shape as the
  -- initial accumulator.  We accomplish this with an assertion and
  -- reshape().
  Body
body' <- Scope SOACS -> InternaliseM Body -> InternaliseM Body
forall lore (m :: * -> *) a.
LocalScope lore m =>
Scope lore -> m a -> m a
localScope ([Param Type] -> Scope SOACS
forall lore dec.
(LParamInfo lore ~ dec) =>
[Param dec] -> Scope lore
scopeOfLParams [Param Type]
params) (InternaliseM Body -> InternaliseM Body)
-> InternaliseM Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$
           ErrorMsg SubExp -> SrcLoc -> [Type] -> Body -> InternaliseM Body
ensureResultShape
           ([ErrorMsgPart SubExp] -> ErrorMsg SubExp
forall a. [ErrorMsgPart a] -> ErrorMsg a
ErrorMsg [String -> ErrorMsgPart SubExp
forall a. String -> ErrorMsgPart a
ErrorString String
"shape of result does not match shape of initial value"])
           (Exp -> SrcLoc
forall a. Located a => a -> SrcLoc
srclocOf Exp
lam) [Type]
rettype' Body
body
  Lambda -> InternaliseM Lambda
forall (m :: * -> *) a. Monad m => a -> m a
return (Lambda -> InternaliseM Lambda) -> Lambda -> InternaliseM Lambda
forall a b. (a -> b) -> a -> b
$ [LParam SOACS] -> Body -> [Type] -> Lambda
forall lore. [LParam lore] -> BodyT lore -> [Type] -> LambdaT lore
I.Lambda [Param Type]
[LParam SOACS]
params Body
body' [Type]
rettype'

internaliseStreamLambda :: InternaliseLambda
                        -> E.Exp
                        -> [I.Type]
                        -> InternaliseM ([LParam], Body)
internaliseStreamLambda :: InternaliseLambda
-> Exp -> [Type] -> InternaliseM ([LParam SOACS], Body)
internaliseStreamLambda InternaliseLambda
internaliseLambda Exp
lam [Type]
rowts = do
  VName
chunk_size <- String -> InternaliseM VName
forall (m :: * -> *). MonadFreshNames m => String -> m VName
newVName String
"chunk_size"
  let chunk_param :: Param (TypeBase shape u)
chunk_param = VName -> TypeBase shape u -> Param (TypeBase shape u)
forall dec. VName -> dec -> Param dec
I.Param VName
chunk_size (TypeBase shape u -> Param (TypeBase shape u))
-> TypeBase shape u -> Param (TypeBase shape u)
forall a b. (a -> b) -> a -> b
$ PrimType -> TypeBase shape u
forall shape u. PrimType -> TypeBase shape u
I.Prim PrimType
int32
      chunktypes :: [Type]
chunktypes = (Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map (Type -> SubExp -> Type
forall d.
ArrayShape (ShapeBase d) =>
TypeBase (ShapeBase d) NoUniqueness
-> d -> TypeBase (ShapeBase d) NoUniqueness
`arrayOfRow` VName -> SubExp
I.Var VName
chunk_size) [Type]
rowts
  Scope SOACS
-> InternaliseM ([Param Type], Body)
-> InternaliseM ([Param Type], Body)
forall lore (m :: * -> *) a.
LocalScope lore m =>
Scope lore -> m a -> m a
localScope ([Param Type] -> Scope SOACS
forall lore dec.
(LParamInfo lore ~ dec) =>
[Param dec] -> Scope lore
scopeOfLParams [Param Type
forall shape u. Param (TypeBase shape u)
chunk_param]) (InternaliseM ([Param Type], Body)
 -> InternaliseM ([Param Type], Body))
-> InternaliseM ([Param Type], Body)
-> InternaliseM ([Param Type], Body)
forall a b. (a -> b) -> a -> b
$ do
    ([Param Type]
lam_params, Body
orig_body, [TypeBase ExtShape NoUniqueness]
_) <-
      InternaliseLambda
internaliseLambda Exp
lam ([Type]
 -> InternaliseM
      ([LParam SOACS], Body, [TypeBase ExtShape NoUniqueness]))
-> [Type]
-> InternaliseM
     ([LParam SOACS], Body, [TypeBase ExtShape NoUniqueness])
forall a b. (a -> b) -> a -> b
$ PrimType -> Type
forall shape u. PrimType -> TypeBase shape u
I.Prim PrimType
int32 Type -> [Type] -> [Type]
forall a. a -> [a] -> [a]
: [Type]
chunktypes
    let Param Type
orig_chunk_param : [Param Type]
params = [Param Type]
lam_params
    Body
body <- Binder SOACS Body -> InternaliseM Body
forall lore (m :: * -> *) somelore.
(Bindable lore, MonadFreshNames m, HasScope somelore m,
 SameScope somelore lore) =>
Binder lore (Body lore) -> m (Body lore)
runBodyBinder (Binder SOACS Body -> InternaliseM Body)
-> Binder SOACS Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$ do
      [VName]
-> Exp (Lore (BinderT SOACS (State VNameSource)))
-> BinderT SOACS (State VNameSource) ()
forall (m :: * -> *).
MonadBinder m =>
[VName] -> Exp (Lore m) -> m ()
letBindNames [Param Type -> VName
forall dec. Param dec -> VName
paramName Param Type
orig_chunk_param] (Exp (Lore (BinderT SOACS (State VNameSource)))
 -> BinderT SOACS (State VNameSource) ())
-> Exp (Lore (BinderT SOACS (State VNameSource)))
-> BinderT SOACS (State VNameSource) ()
forall a b. (a -> b) -> a -> b
$ BasicOp -> ExpT SOACS
forall lore. BasicOp -> ExpT lore
I.BasicOp (BasicOp -> ExpT SOACS) -> BasicOp -> ExpT SOACS
forall a b. (a -> b) -> a -> b
$ SubExp -> BasicOp
I.SubExp (SubExp -> BasicOp) -> SubExp -> BasicOp
forall a b. (a -> b) -> a -> b
$ VName -> SubExp
I.Var VName
chunk_size
      Body -> Binder SOACS Body
forall (m :: * -> *) a. Monad m => a -> m a
return Body
orig_body
    ([Param Type], Body) -> InternaliseM ([Param Type], Body)
forall (m :: * -> *) a. Monad m => a -> m a
return (Param Type
forall shape u. Param (TypeBase shape u)
chunk_paramParam Type -> [Param Type] -> [Param Type]
forall a. a -> [a] -> [a]
:[Param Type]
params, Body
body)

-- Given @k@ lambdas, this will return a lambda that returns an
-- (k+2)-element tuple of integers.  The first element is the
-- equivalence class ID in the range [0,k].  The remaining are all zero
-- except for possibly one element.
internalisePartitionLambda :: InternaliseLambda
                           -> Int
                           -> E.Exp
                           -> [I.SubExp]
                           -> InternaliseM I.Lambda
internalisePartitionLambda :: InternaliseLambda -> Int -> Exp -> [SubExp] -> InternaliseM Lambda
internalisePartitionLambda InternaliseLambda
internaliseLambda Int
k Exp
lam [SubExp]
args = do
  [Type]
argtypes <- (SubExp -> InternaliseM Type) -> [SubExp] -> InternaliseM [Type]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM SubExp -> InternaliseM Type
forall t (m :: * -> *). HasScope t m => SubExp -> m Type
I.subExpType [SubExp]
args
  let rowtypes :: [Type]
rowtypes = (Type -> Type) -> [Type] -> [Type]
forall a b. (a -> b) -> [a] -> [b]
map Type -> Type
forall shape u.
ArrayShape shape =>
TypeBase shape u -> TypeBase shape u
I.rowType [Type]
argtypes
  ([Param Type]
params, Body
body, [TypeBase ExtShape NoUniqueness]
_) <- InternaliseLambda
internaliseLambda Exp
lam [Type]
rowtypes
  Body
body' <- Scope SOACS -> InternaliseM Body -> InternaliseM Body
forall lore (m :: * -> *) a.
LocalScope lore m =>
Scope lore -> m a -> m a
localScope ([Param Type] -> Scope SOACS
forall lore dec.
(LParamInfo lore ~ dec) =>
[Param dec] -> Scope lore
scopeOfLParams [Param Type]
params) (InternaliseM Body -> InternaliseM Body)
-> InternaliseM Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$
           Body -> InternaliseM Body
lambdaWithIncrement Body
body
  Lambda -> InternaliseM Lambda
forall (m :: * -> *) a. Monad m => a -> m a
return (Lambda -> InternaliseM Lambda) -> Lambda -> InternaliseM Lambda
forall a b. (a -> b) -> a -> b
$ [LParam SOACS] -> Body -> [Type] -> Lambda
forall lore. [LParam lore] -> BodyT lore -> [Type] -> LambdaT lore
I.Lambda [Param Type]
[LParam SOACS]
params Body
body' [Type]
forall shape u. [TypeBase shape u]
rettype
  where rettype :: [TypeBase shape u]
rettype = Int -> TypeBase shape u -> [TypeBase shape u]
forall a. Int -> a -> [a]
replicate (Int
kInt -> Int -> Int
forall a. Num a => a -> a -> a
+Int
2) (TypeBase shape u -> [TypeBase shape u])
-> TypeBase shape u -> [TypeBase shape u]
forall a b. (a -> b) -> a -> b
$ PrimType -> TypeBase shape u
forall shape u. PrimType -> TypeBase shape u
I.Prim PrimType
int32
        result :: Int -> [SubExp]
result Int
i = (Int32 -> SubExp) -> [Int32] -> [SubExp]
forall a b. (a -> b) -> [a] -> [b]
map Int32 -> SubExp
forall v. IsValue v => v -> SubExp
constant ([Int32] -> [SubExp]) -> [Int32] -> [SubExp]
forall a b. (a -> b) -> a -> b
$ (Int -> Int32
forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
i :: Int32) Int32 -> [Int32] -> [Int32]
forall a. a -> [a] -> [a]
:
                   (Int -> Int32 -> [Int32]
forall a. Int -> a -> [a]
replicate Int
i Int32
0 [Int32] -> [Int32] -> [Int32]
forall a. [a] -> [a] -> [a]
++ [Int32
1::Int32] [Int32] -> [Int32] -> [Int32]
forall a. [a] -> [a] -> [a]
++ Int -> Int32 -> [Int32]
forall a. Int -> a -> [a]
replicate (Int
kInt -> Int -> Int
forall a. Num a => a -> a -> a
-Int
i) Int32
0)

        mkResult :: SubExp -> Int -> m [SubExp]
mkResult SubExp
_ Int
i | Int
i Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>= Int
k = [SubExp] -> m [SubExp]
forall (m :: * -> *) a. Monad m => a -> m a
return ([SubExp] -> m [SubExp]) -> [SubExp] -> m [SubExp]
forall a b. (a -> b) -> a -> b
$ Int -> [SubExp]
result Int
i
        mkResult SubExp
eq_class Int
i = do
          SubExp
is_i <- String -> Exp (Lore m) -> m SubExp
forall (m :: * -> *).
MonadBinder m =>
String -> Exp (Lore m) -> m SubExp
letSubExp String
"is_i" (Exp (Lore m) -> m SubExp) -> Exp (Lore m) -> m SubExp
forall a b. (a -> b) -> a -> b
$ BasicOp -> Exp (Lore m)
forall lore. BasicOp -> ExpT lore
BasicOp (BasicOp -> Exp (Lore m)) -> BasicOp -> Exp (Lore m)
forall a b. (a -> b) -> a -> b
$ CmpOp -> SubExp -> SubExp -> BasicOp
CmpOp (PrimType -> CmpOp
CmpEq PrimType
int32) SubExp
eq_class (Int -> SubExp
forall v. IsValue v => v -> SubExp
constant Int
i)
          ([VName] -> [SubExp]) -> m [VName] -> m [SubExp]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ((VName -> SubExp) -> [VName] -> [SubExp]
forall a b. (a -> b) -> [a] -> [b]
map VName -> SubExp
I.Var) (m [VName] -> m [SubExp])
-> (Exp (Lore m) -> m [VName]) -> Exp (Lore m) -> m [SubExp]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Exp (Lore m) -> m [VName]
forall (m :: * -> *).
MonadBinder m =>
String -> Exp (Lore m) -> m [VName]
letTupExp String
"part_res" (Exp (Lore m) -> m [SubExp]) -> m (Exp (Lore m)) -> m [SubExp]
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<<
            m (Exp (Lore m))
-> m (Body (Lore m)) -> m (Body (Lore m)) -> m (Exp (Lore m))
forall (m :: * -> *).
(MonadBinder m,
 BranchType (Lore m) ~ TypeBase ExtShape NoUniqueness) =>
m (Exp (Lore m))
-> m (Body (Lore m)) -> m (Body (Lore m)) -> m (Exp (Lore m))
eIf (SubExp -> m (Exp (Lore m))
forall (m :: * -> *). MonadBinder m => SubExp -> m (Exp (Lore m))
eSubExp SubExp
is_i) (Body (Lore m) -> m (Body (Lore m))
forall (f :: * -> *) a. Applicative f => a -> f a
pure (Body (Lore m) -> m (Body (Lore m)))
-> Body (Lore m) -> m (Body (Lore m))
forall a b. (a -> b) -> a -> b
$ [SubExp] -> Body (Lore m)
forall lore. Bindable lore => [SubExp] -> Body lore
resultBody ([SubExp] -> Body (Lore m)) -> [SubExp] -> Body (Lore m)
forall a b. (a -> b) -> a -> b
$ Int -> [SubExp]
result Int
i)
                               ([SubExp] -> Body (Lore m)
forall lore. Bindable lore => [SubExp] -> Body lore
resultBody ([SubExp] -> Body (Lore m)) -> m [SubExp] -> m (Body (Lore m))
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> SubExp -> Int -> m [SubExp]
mkResult SubExp
eq_class (Int
iInt -> Int -> Int
forall a. Num a => a -> a -> a
+Int
1))

        lambdaWithIncrement :: I.Body -> InternaliseM I.Body
        lambdaWithIncrement :: Body -> InternaliseM Body
lambdaWithIncrement Body
lam_body = Binder SOACS Body -> InternaliseM Body
forall lore (m :: * -> *) somelore.
(Bindable lore, MonadFreshNames m, HasScope somelore m,
 SameScope somelore lore) =>
Binder lore (Body lore) -> m (Body lore)
runBodyBinder (Binder SOACS Body -> InternaliseM Body)
-> Binder SOACS Body -> InternaliseM Body
forall a b. (a -> b) -> a -> b
$ do
          SubExp
eq_class <- [SubExp] -> SubExp
forall a. [a] -> a
head ([SubExp] -> SubExp)
-> BinderT SOACS (State VNameSource) [SubExp]
-> BinderT SOACS (State VNameSource) SubExp
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Body (Lore (BinderT SOACS (State VNameSource)))
-> BinderT SOACS (State VNameSource) [SubExp]
forall (m :: * -> *). MonadBinder m => Body (Lore m) -> m [SubExp]
bodyBind Body (Lore (BinderT SOACS (State VNameSource)))
Body
lam_body
          [SubExp] -> Body
forall lore. Bindable lore => [SubExp] -> Body lore
resultBody ([SubExp] -> Body)
-> BinderT SOACS (State VNameSource) [SubExp] -> Binder SOACS Body
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> SubExp -> Int -> BinderT SOACS (State VNameSource) [SubExp]
forall (m :: * -> *).
(MonadBinder m, Bindable (Lore m)) =>
SubExp -> Int -> m [SubExp]
mkResult SubExp
eq_class Int
0