clash-lib-1.4.0: src/Clash/Normalize/PrimitiveReductions.hs
{-|
Copyright : (C) 2015-2016, University of Twente,
2016 , Myrtle Software Ltd
License : BSD2 (see the file LICENSE)
Maintainer : Christiaan Baaij <christiaan.baaij@gmail.com>
Reductions of primitives
Currently, it contains reductions for:
* Clash.Sized.Vector.map
* Clash.Sized.Vector.zipWith
* Clash.Sized.Vector.traverse#
* Clash.Sized.Vector.foldr
* Clash.Sized.Vector.fold
* Clash.Sized.Vector.dfold
* Clash.Sized.Vector.(++)
* Clash.Sized.Vector.head
* Clash.Sized.Vector.tail
* Clash.Sized.Vector.unconcatBitVector#
* Clash.Sized.Vector.replicate
* Clash.Sized.Vector.imap
* Clash.Sized.Vector.dtfold
* Clash.Sized.RTree.tfold
* Clash.Sized.Vector.reverse
Partially handles:
* Clash.Sized.Vector.unconcat
* Clash.Sized.Vector.transpose
-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE QuasiQuotes #-}
module Clash.Normalize.PrimitiveReductions where
import qualified Control.Lens as Lens
import Control.Lens ((.=))
import Data.List (mapAccumR)
import Data.List.Extra (zipEqual)
import qualified Data.Maybe as Maybe
import TextShow (showt)
#if MIN_VERSION_ghc(9,0,0)
import GHC.Builtin.Names
(boolTyConKey, typeNatAddTyFamNameKey, typeNatMulTyFamNameKey,
typeNatSubTyFamNameKey)
import GHC.Types.Unique (getKey)
import GHC.Types.SrcLoc (wiredInSrcSpan)
#else
import PrelNames
(boolTyConKey, typeNatAddTyFamNameKey, typeNatMulTyFamNameKey,
typeNatSubTyFamNameKey)
import Unique (getKey)
import SrcLoc (wiredInSrcSpan)
#endif
import Clash.Core.DataCon (DataCon)
import Clash.Core.Literal (Literal (..))
import Clash.Core.Name
(nameOcc, Name(..), NameSort(User), mkUnsafeSystemName)
import Clash.Core.Pretty (showPpr)
import Clash.Core.Term
(IsMultiPrim (..), CoreContext (..), PrimInfo (..), Term (..), WorkInfo (..), Pat (..),
collectTermIds, mkApps)
import Clash.Core.TermInfo
import Clash.Core.Type (LitTy (..), Type (..),
TypeView (..), coreView1,
mkFunTy, mkTyConApp,
splitFunForallTy, tyView)
import Clash.Core.TyCon
(TyConMap, TyConName, tyConDataCons, tyConName)
import Clash.Core.TysPrim
(integerPrimTy, typeNatKind, liftedTypeKind)
import Clash.Core.Util
(appendToVec, extractElems, extractTElems, mkRTree,
mkUniqInternalId, mkUniqSystemTyVar, mkVec, dataConInstArgTys,
primCo, undefinedTm)
import Clash.Core.Var (Var (..), mkTyVar, mkLocalId)
import Clash.Core.VarEnv
(InScopeSet, extendInScopeSetList)
import {-# SOURCE #-} Clash.Normalize.Strategy
import Clash.Normalize.Types
import Clash.Rewrite.Types
import Clash.Rewrite.Util
import Clash.Unique
import Clash.Util
import qualified Clash.Util.Interpolate as I
typeNatAdd :: TyConName
typeNatAdd =
Name User "GHC.TypeNats.+" (getKey typeNatAddTyFamNameKey) wiredInSrcSpan
typeNatMul :: TyConName
typeNatMul =
Name User "GHC.TypeNats.*" (getKey typeNatMulTyFamNameKey) wiredInSrcSpan
typeNatSub :: TyConName
typeNatSub =
Name User "GHC.TypeNats.-" (getKey typeNatSubTyFamNameKey) wiredInSrcSpan
vecHeadPrim
:: TyConName
-- ^ Vec TyCon name
-> Term
vecHeadPrim vecTcNm =
-- head :: Vec (n+1) a -> a
Prim (PrimInfo "Clash.Sized.Vector.head" (vecHeadTy vecTcNm) WorkNever SingleResult)
vecLastPrim
:: TyConName
-- ^ Vec TyCon name
-> Term
vecLastPrim vecTcNm =
-- last :: Vec (n+1) a -> a
-- has the same type signature as head, hence we're reusing its type
-- definition here.
Prim (PrimInfo "Clash.Sized.Vector.last" (vecHeadTy vecTcNm) WorkNever SingleResult)
vecHeadTy
:: TyConName
-- ^ Vec TyCon name
-> Type
vecHeadTy vecNm =
ForAllTy nTV $
ForAllTy aTV $
mkFunTy
(mkTyConApp vecNm [mkTyConApp typeNatAdd [VarTy nTV, LitTy (NumTy 1)], VarTy aTV])
(VarTy aTV)
where
aTV = mkTyVar liftedTypeKind (mkUnsafeSystemName "a" 0)
nTV = mkTyVar typeNatKind (mkUnsafeSystemName "n" 1)
vecTailPrim
:: TyConName
-- ^ Vec TyCon name
-> Term
vecTailPrim vecTcNm =
-- tail :: Vec (n + 1) a -> Vec n a
Prim (PrimInfo "Clash.Sized.Vector.tail" (vecTailTy vecTcNm) WorkNever SingleResult)
vecInitPrim
:: TyConName
-- ^ Vec TyCon name
-> Term
vecInitPrim vecTcNm =
-- init :: Vec (n + 1) a -> Vec n a
-- has the same type signature as tail, hence we're reusing its type
-- definition here.
Prim (PrimInfo "Clash.Sized.Vector.init" (vecTailTy vecTcNm) WorkNever SingleResult)
vecTailTy
:: TyConName
-- ^ Vec TyCon name
-> Type
vecTailTy vecNm =
ForAllTy nTV $
ForAllTy aTV $
mkFunTy
(mkTyConApp vecNm [mkTyConApp typeNatAdd [VarTy nTV, LitTy (NumTy 1)], VarTy aTV])
(mkTyConApp vecNm [VarTy nTV, VarTy aTV])
where
nTV = mkTyVar typeNatKind (mkUnsafeSystemName "n" 0)
aTV = mkTyVar liftedTypeKind (mkUnsafeSystemName "a" 1)
-- | Makes two case statements: the first one extract the _head_ from the given
-- vector, the latter the tail.
extractHeadTail
:: DataCon
-- ^ The Cons (:>) constructor
-> Type
-- ^ Element type
-> Integer
-- ^ Length of the vector
-> Term
-- ^ Vector to extract head from
-> (Term, Term)
-- ^ (head of vector, tail of vector)
extractHeadTail consCon elTy n vec =
( Case vec elTy [(pat, Var el)]
, Case vec restTy [(pat, Var rest)] )
where
tys = [(LitTy (NumTy n)), elTy, (LitTy (NumTy (n-1)))]
Just [coTy, _elTy, restTy] = dataConInstArgTys consCon tys
mTV = mkTyVar typeNatKind (mkUnsafeSystemName "m" 0)
co = mkLocalId coTy (mkUnsafeSystemName "_co_" 1)
el = mkLocalId elTy (mkUnsafeSystemName "el" 2)
rest = mkLocalId restTy (mkUnsafeSystemName "res" 3)
pat = DataPat consCon [mTV] [co, el, rest]
-- Make case statement that projects the _head_ from a given vector
extractHead
:: DataCon
-- ^ The Cons (:>) constructor
-> Type
-- ^ Element type
-> Integer
-- ^ Length of the vector
-> Term
-- ^ Vector to extract head from
-> Term
-- ^ Head of vector
extractHead consCon elTy vLength vec =
fst (extractHeadTail consCon elTy vLength vec)
-- Make case statement that projects the _tail_ from a given vector
extractTail
:: DataCon
-- ^ The Cons (:>) constructor
-> Type
-- ^ Element type
-> Integer
-- ^ Length of the vector
-> Term
-- ^ Vector to extract head from
-> Term
-- ^ Tail of vector
extractTail consCon elTy vLength vec =
snd (extractHeadTail consCon elTy vLength vec)
-- | Create a vector of supplied elements
mkVecCons
:: HasCallStack
=> DataCon
-- ^ The Cons (:>) constructor
-> Type
-- ^ Element type
-> Integer
-- ^ Length of the vector
-> Term
-- ^ head of the vector
-> Term
-- ^ tail of the vector
-> Term
mkVecCons consCon resTy n h t
| n <= 0 = error "mkVecCons: n <= 0"
| otherwise =
mkApps (Data consCon) [ Right (LitTy (NumTy n))
, Right resTy
, Right (LitTy (NumTy (n-1)))
, Left (primCo consCoTy)
, Left h
, Left t ]
where
args = dataConInstArgTys consCon [LitTy (NumTy n), resTy, LitTy (NumTy (n-1))]
Just (consCoTy : _) = args
-- | Create an empty vector
mkVecNil
:: DataCon
-- ^ The Nil constructor
-> Type
-- ^ The element type
-> Term
mkVecNil nilCon resTy =
mkApps (Data nilCon) [ Right (LitTy (NumTy 0))
, Right resTy
, Left (primCo nilCoTy) ]
where
args = dataConInstArgTys nilCon [LitTy (NumTy 0), resTy]
Just (nilCoTy : _ ) = args
-- | Replace an application of the @Clash.Sized.Vector.reverse@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.reverse@
reduceReverse
:: InScopeSet
-> Integer
-- ^ Length of the vector
-> Type
-- ^ Element of type of the vector
-> Term
-- ^ The vector to reverse
-> NormalizeSession Term
reduceReverse inScope0 n elTy vArg = do
tcm <- Lens.view tcCache
let ty = termType tcm vArg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| Just vecTc <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon, consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
let (uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems uniqs0 inScope0 consCon elTy 'V' n vArg
lbody = mkVec nilCon consCon elTy n (reverse vars)
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceReverse: argument does not have a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.zipWith@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.zipWith@
reduceZipWith
:: TransformContext
-> PrimInfo -- ^ zipWith primitive info
-> Integer -- ^ Length of the vector(s)
-> Type -- ^ Element type of the lhs of the function
-> Type -- ^ Element type of the rhs of the function
-> Type -- ^ Element type of the result of the function
-> Term -- ^ The zipWith'd functions
-> Term -- ^ The 1st vector argument
-> Term -- ^ The 2nd vector argument
-> NormalizeSession Term
reduceZipWith _ctx zipWithPrimInfo n lhsElTy rhsElTy resElTy fun lhsArg rhsArg = do
tcm <- Lens.view tcCache
changed (go tcm (termType tcm lhsArg))
where
go tcm (coreView1 tcm -> Just ty) = go tcm ty
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon, consCon] <- tyConDataCons vecTc
= if n == 0 then
mkVecNil nilCon resElTy
else
let
(a, as) = extractHeadTail consCon lhsElTy n lhsArg
(b, bs) = extractHeadTail consCon rhsElTy n rhsArg
c = mkApps fun [Left a, Left b]
cs = mkApps (Prim zipWithPrimInfo) [ Right lhsElTy
, Right rhsElTy
, Right resElTy
, Right (LitTy (NumTy (n - 1)))
, Left fun
, Left as
, Left bs ]
in
mkVecCons consCon resElTy n c cs
go _ ty =
error $ $(curLoc) ++ [I.i|
reduceZipWith: argument does not have a vector type:
#{showPpr ty}
|]
-- | Replace an application of the @Clash.Sized.Vector.map@ primitive on vectors
-- of a known length @n@, by the fully unrolled recursive "definition" of
-- @Clash.Sized.Vector.map@
reduceMap
:: TransformContext
-> PrimInfo -- ^ map primitive info
-> Integer -- ^ Length of the vector
-> Type -- ^ Argument type of the function
-> Type -- ^ Result type of the function
-> Term -- ^ The map'd function
-> Term -- ^ The map'd over vector
-> NormalizeSession Term
reduceMap _ctx mapPrimInfo n argElTy resElTy fun arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
changed (go tcm ty)
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= if n == 0 then
mkVecNil nilCon argElTy
else
let
nPredTy = Right (LitTy (NumTy (n - 1)))
(a, as) = extractHeadTail consCon argElTy n arg
b = mkApps fun [Left a]
bs = mkApps (Prim mapPrimInfo) [ Right argElTy
, Right resElTy
, nPredTy
, Left fun
, Left as ]
in
mkVecCons consCon resElTy n b bs
go _ ty =
error $ $(curLoc) ++ [I.i|
reduceMap: argument does not have a vector type:
#{showPpr ty}
|]
-- | Replace an application of the @Clash.Sized.Vector.imap@ primitive on vectors
-- of a known length @n@, by the fully unrolled recursive "definition" of
-- @Clash.Sized.Vector.imap@
reduceImap
:: TransformContext
-> Integer -- ^ Length of the vector
-> Type -- ^ Argument type of the function
-> Type -- ^ Result type of the function
-> Term -- ^ The imap'd function
-> Term -- ^ The imap'd over vector
-> NormalizeSession Term
reduceImap (TransformContext is0 ctx) n argElTy resElTy fun arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
fun1 <- constantPropagation (TransformContext is0 (AppArg Nothing:ctx)) fun
let is1 = extendInScopeSetList is0 (collectTermIds fun1)
(uniqs1,nTv) = mkUniqSystemTyVar (uniqs0,is1) ("n",typeNatKind)
(uniqs2,(vars,elems)) = second (second concat . unzip)
$ uncurry extractElems uniqs1 consCon argElTy 'I' n arg
(Right idxTy:_,_) = splitFunForallTy (termType tcm fun)
(TyConApp idxTcNm _) = tyView idxTy
-- fromInteger# :: KnownNat n => Integer -> Index n
idxFromIntegerTy = ForAllTy nTv
(foldr mkFunTy
(mkTyConApp idxTcNm
[VarTy nTv])
[integerPrimTy,integerPrimTy])
idxFromInteger = Prim (PrimInfo "Clash.Sized.Internal.Index.fromInteger#" idxFromIntegerTy WorkNever SingleResult)
idxs = map (App (App (TyApp idxFromInteger (LitTy (NumTy n)))
(Literal (IntegerLiteral (toInteger n))))
. Literal . IntegerLiteral . toInteger) [0..(n-1)]
funApps = zipWith (\i v -> App (App fun1 i) v) idxs vars
lbody = mkVec nilCon consCon resElTy n funApps
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs2
changed lb
go _ ty = error $ $(curLoc) ++ "reduceImap: argument does not have a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.iterateI@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.iterateI@
reduceIterateI
:: TransformContext
-> Integer
-- ^ Length of vector
-> Type
-- ^ Vector's element type
-> Type
-- ^ Vector's type
-> Term
-- ^ iterateI's HO-function argument
-> Term
-- ^ iterateI's start value
-> RewriteMonad NormalizeState Term
-- ^ Fully unrolled definition
reduceIterateI (TransformContext is0 ctx) n aTy vTy f0 a = do
tcm <- Lens.view tcCache
f1 <- constantPropagation (TransformContext is0 (AppArg Nothing:ctx)) f0
-- Generate uniq ids for element assignments.
uniqs0 <- Lens.use uniqSupply
let
is1 = extendInScopeSetList is0 (collectTermIds f1)
((uniqs1, _is2), elementIds) =
mapAccumR
mkUniqInternalId
(uniqs0, is1)
(zip (map (("el" <>) . showt) [1..n-1]) (repeat aTy))
uniqSupply .= uniqs1
let
TyConApp vecTcNm _ = tyView vTy
Just vecTc = lookupUniqMap vecTcNm tcm
[nilCon, consCon] = tyConDataCons vecTc
elems = map (App f1) (a:map Var elementIds)
vec = mkVec nilCon consCon aTy n (take (fromInteger n) (a:map Var elementIds))
-- Result:
-- let
-- el1 = f a
-- el2 = f el1
-- el3 = f el2
-- ..
-- in
-- (a :> el1 :> el2 :> el3 :> ..)
--
pure (Letrec (zip elementIds elems) vec)
-- | Replace an application of the @Clash.Sized.Vector.traverse#@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.traverse#@
reduceTraverse
:: TransformContext
-> Integer -- ^ Length of the vector
-> Type -- ^ Element type of the argument vector
-> Type -- ^ The type of the applicative
-> Type -- ^ Element type of the result vector
-> Term -- ^ The @Applicative@ dictionary
-> Term -- ^ The function to traverse with
-> Term -- ^ The argument vector
-> NormalizeSession Term
reduceTraverse (TransformContext is0 ctx) n aTy fTy bTy dict fun arg = do
tcm <- Lens.view tcCache
let (TyConApp apDictTcNm _) = tyView (termType tcm dict)
ty = termType tcm arg
go tcm apDictTcNm ty
where
go tcm apDictTcNm (coreView1 tcm -> Just ty') = go tcm apDictTcNm ty'
go tcm apDictTcNm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
fun1 <- constantPropagation (TransformContext is0 (AppArg Nothing:ctx)) fun
let is1 = extendInScopeSetList is0 (collectTermIds fun1)
(Just apDictTc) = lookupUniqMap apDictTcNm tcm
[apDictCon] = tyConDataCons apDictTc
(Just apDictIdTys) = dataConInstArgTys apDictCon [fTy]
(uniqs1,apDictIds@[functorDictId,pureId,apId,_,_,_]) =
mapAccumR mkUniqInternalId (uniqs0,is1)
(zipEqual ["functorDict","pure","ap","liftA2","apConstL","apConstR"]
apDictIdTys)
(TyConApp funcDictTcNm _) = tyView (head apDictIdTys)
(Just funcDictTc) = lookupUniqMap funcDictTcNm tcm
[funcDictCon] = tyConDataCons funcDictTc
(Just funcDictIdTys) = dataConInstArgTys funcDictCon [fTy]
(uniqs2,funcDicIds@[fmapId,_]) =
mapAccumR mkUniqInternalId uniqs1
(zipEqual ["fmap","fmapConst"] funcDictIdTys)
apPat = DataPat apDictCon [] apDictIds
fnPat = DataPat funcDictCon [] funcDicIds
-- Extract the 'pure' function from the Applicative dictionary
pureTy = varType pureId
pureTm = Case dict pureTy [(apPat,Var pureId)]
-- Extract the '<*>' function from the Applicative dictionary
apTy = varType apId
apTm = Case dict apTy [(apPat, Var apId)]
-- Extract the Functor dictionary from the Applicative dictionary
funcTy = varType functorDictId
funcTm = Case dict funcTy
[(apPat,Var functorDictId)]
-- Extract the 'fmap' function from the Functor dictionary
fmapTy = varType fmapId
fmapTm = Case (Var functorDictId) fmapTy
[(fnPat, Var fmapId)]
(uniqs3,(vars,elems)) = second (second concat . unzip)
$ uncurry extractElems uniqs2 consCon aTy 'T' n arg
funApps = map (fun1 `App`) vars
lbody = mkTravVec vecTcNm nilCon consCon (Var (apDictIds!!1))
(Var (apDictIds!!2))
(Var (funcDicIds!!0))
bTy n funApps
lb = Letrec ([((apDictIds!!0), funcTm)
,((apDictIds!!1), pureTm)
,((apDictIds!!2), apTm)
,((funcDicIds!!0), fmapTm)
] ++ init elems) lbody
uniqSupply Lens..= uniqs3
changed lb
go _ _ ty = error $ $(curLoc) ++ "reduceTraverse: argument does not have a vector type: " ++ showPpr ty
-- | Create the traversable vector
--
-- e.g. for a length '2' input vector, we get
--
-- > (:>) <$> x0 <*> ((:>) <$> x1 <*> pure Nil)
mkTravVec :: TyConName -- ^ Vec tcon
-> DataCon -- ^ Nil con
-> DataCon -- ^ Cons con
-> Term -- ^ 'pure' term
-> Term -- ^ '<*>' term
-> Term -- ^ 'fmap' term
-> Type -- ^ 'b' ty
-> Integer -- ^ Length of the vector
-> [Term] -- ^ Elements of the vector
-> Term
mkTravVec vecTc nilCon consCon pureTm apTm fmapTm bTy = go
where
go :: Integer -> [Term] -> Term
go _ [] = mkApps pureTm [Right (mkTyConApp vecTc [LitTy (NumTy 0),bTy])
,Left (mkApps (Data nilCon)
[Right (LitTy (NumTy 0))
,Right bTy
,Left (primCo nilCoTy)])]
go n (x:xs) = mkApps apTm
[Right (mkTyConApp vecTc [LitTy (NumTy (n-1)),bTy])
,Right (mkTyConApp vecTc [LitTy (NumTy n),bTy])
,Left (mkApps fmapTm [Right bTy
,Right (mkFunTy (mkTyConApp vecTc [LitTy (NumTy (n-1)),bTy])
(mkTyConApp vecTc [LitTy (NumTy n),bTy]))
,Left (mkApps (Data consCon)
[Right (LitTy (NumTy n))
,Right bTy
,Right (LitTy (NumTy (n-1)))
,Left (primCo (consCoTy n))
])
,Left x])
,Left (go (n-1) xs)]
nilCoTy = head (Maybe.fromJust (dataConInstArgTys nilCon [(LitTy (NumTy 0))
,bTy]))
consCoTy n = head (Maybe.fromJust (dataConInstArgTys consCon
[(LitTy (NumTy n))
,bTy
,(LitTy (NumTy (n-1)))]))
-- | Replace an application of the @Clash.Sized.Vector.foldr@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.foldr@
reduceFoldr
:: TransformContext
-> PrimInfo
-- ^ Primitive info for foldr blackbox
-> Integer
-- ^ Length of the vector
-> Type
-- ^ Element type of the argument vector
-> Term
-- ^ The function to fold with
-> Term
-- ^ The starting value
-> Term
-- ^ The argument vector
-> NormalizeSession Term
reduceFoldr _ _ 0 _ _ start _ = changed start
reduceFoldr _ctx foldrPrimInfo n aTy fun start arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
changed (go tcm ty)
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, Just vecTc <- lookupUniqMap vecTcNm tcm
, [_nilCon, consCon] <- tyConDataCons vecTc
= let
(a, as) = extractHeadTail consCon aTy n arg
b = mkApps (Prim foldrPrimInfo) [ Right aTy
, Right (termType tcm start)
, Right (LitTy (NumTy (n - 1)))
, Left fun
, Left start
, Left as ]
in
mkApps fun [Left a, Left b]
go _ ty =
error $ $(curLoc) ++ [I.i|
reduceFoldr: argument does not have a vector type:
#{showPpr ty}
|]
-- | Replace an application of the @Clash.Sized.Vector.fold@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.fold@
reduceFold
:: TransformContext
-> Integer
-- ^ Length of the vector
-> Type
-- ^ Element type of the argument vector
-> Term
-- ^ The function to fold with
-> Term
-- ^ The argument vector
-> NormalizeSession Term
reduceFold (TransformContext is0 ctx) n aTy fun arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
fun1 <- constantPropagation (TransformContext is0 (AppArg Nothing:ctx)) fun
let is1 = extendInScopeSetList is0 (collectTermIds fun1)
(uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems uniqs0 is1 consCon aTy 'F' n arg
lbody = foldV fun1 vars
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceFold: argument does not have a vector type: " ++ showPpr ty
foldV _ [a] = a
foldV f as = let (l,r) = splitAt (length as `div` 2) as
lF = foldV f l
rF = foldV f r
in mkApps f [Left lF, Left rF]
-- | Replace an application of the @Clash.Sized.Vector.dfold@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.dfold@
reduceDFold
:: InScopeSet
-> Integer
-- ^ Length of the vector
-> Type
-- ^ Element type of the argument vector
-> Term
-- ^ Function to fold with
-> Term
-- ^ Starting value
-> Term
-- ^ The vector to fold
-> NormalizeSession Term
reduceDFold _ 0 _ _ start _ = changed start
reduceDFold is0 n aTy fun start arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
let is1 = extendInScopeSetList is0 (collectTermIds fun)
-- TODO: Should 'constantPropagation' be used on 'fun'? It seems to
-- TOOD: be used for every other function in this module.
(uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems uniqs0 is1 consCon aTy 'D' n arg
(_ltv:Right snTy:_,_) = splitFunForallTy (termType tcm fun)
(TyConApp snatTcNm _) = tyView snTy
(Just snatTc) = lookupUniqMap snatTcNm tcm
[snatDc] = tyConDataCons snatTc
lbody = doFold (buildSNat snatDc) (n-1) vars
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceDFold: argument does not have a vector type: " ++ showPpr ty
doFold _ _ [] = start
doFold snDc k (x:xs) = mkApps fun
[Right (LitTy (NumTy k))
,Left (snDc k)
,Left x
,Left (doFold snDc (k-1) xs)
]
-- | Replace an application of the @Clash.Sized.Vector.head@ primitive on
-- vectors of a known length @n@, by a projection of the first element of a
-- vector.
reduceHead
:: InScopeSet
-> Integer -- ^ Length of the vector
-> Type -- ^ Element type of the vector
-> Term -- ^ The argument vector
-> NormalizeSession Term
reduceHead inScope n aTy vArg = do
tcm <- Lens.view tcCache
let ty = termType tcm vArg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
let (uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems uniqs0 inScope consCon aTy 'H' n vArg
lb = Letrec [head elems] (head vars)
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceHead: argument does not have a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.tail@ primitive on
-- vectors of a known length @n@, by a projection of the tail of a
-- vector.
reduceTail
:: InScopeSet
-> Integer -- ^ Length of the vector
-> Type -- ^ Element type of the vector
-> Term -- ^ The argument vector
-> NormalizeSession Term
reduceTail inScope n aTy vArg = do
tcm <- Lens.view tcCache
let ty = termType tcm vArg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
let (uniqs1,(_,elems)) = second (second concat . unzip)
$ extractElems uniqs0 inScope consCon aTy 'L' n vArg
b@(tB,_) = elems !! 1
lb = Letrec [b] (Var tB)
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceTail: argument does not have a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.last@ primitive on
-- vectors of a known length @n@, by a projection of the last element of a
-- vector.
reduceLast
:: InScopeSet
-> Integer -- ^ Length of the vector
-> Type -- ^ Element type of the vector
-> Term -- ^ The argument vector
-> NormalizeSession Term
reduceLast inScope n aTy vArg = do
tcm <- Lens.view tcCache
let ty = termType tcm vArg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do
uniqs0 <- Lens.use uniqSupply
let (uniqs1,(_,elems)) = second unzip
$ extractElems uniqs0 inScope consCon aTy 'L' n vArg
(tB,_) = head (last elems)
uniqSupply Lens..= uniqs1
case n of
0 -> changed (undefinedTm aTy)
_ -> changed (Letrec (init (concat elems)) (Var tB))
go _ ty = error $ $(curLoc) ++ "reduceLast: argument does not have a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.init@ primitive on
-- vectors of a known length @n@, by a projection of the init of a
-- vector.
reduceInit
:: InScopeSet
-> PrimInfo -- ^ Primitive info for 'init'
-> Integer -- ^ Length of the vector
-> Type -- ^ Element type of the vector
-> Term -- ^ The argument vector
-> NormalizeSession Term
reduceInit _inScope initPrimInfo n aTy vArg = do
tcm <- Lens.view tcCache
let ty = termType tcm vArg
changed (go tcm ty)
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon, consCon] <- tyConDataCons vecTc
= if n == 0 then
mkVecNil nilCon aTy
else
let
nPredTy = Right (LitTy (NumTy (n - 1)))
(a, as0) = extractHeadTail consCon aTy (n+1) vArg
as1 = mkApps (Prim initPrimInfo) [nPredTy, Right aTy, Left as0]
in
mkVecCons consCon aTy n a as1
go _ ty =
error $ $(curLoc) ++ [I.i|
reduceInit: argument does not have a vector type:
#{showPpr ty}
|]
-- | Replace an application of the @Clash.Sized.Vector.(++)@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.(++)@
reduceAppend
:: InScopeSet
-> Integer -- ^ Length of the LHS arg
-> Integer -- ^ Lenght of the RHS arg
-> Type -- ^ Element type of the vectors
-> Term -- ^ The LHS argument
-> Term -- ^ The RHS argument
-> NormalizeSession Term
reduceAppend inScope n m aTy lArg rArg = do
tcm <- Lens.view tcCache
let ty = termType tcm lArg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do uniqs0 <- Lens.use uniqSupply
let (uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems uniqs0 inScope consCon aTy
'C' n lArg
lbody = appendToVec consCon aTy rArg (n+m) vars
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceAppend: argument does not have a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.unconcat@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.unconcat@
reduceUnconcat :: Integer -- ^ Length of the result vector
-> Integer -- ^ Length of the elements of the result vector
-> Type -- ^ Element type
-> Term -- ^ Argument vector
-> NormalizeSession Term
reduceUnconcat n 0 aTy arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= let nilVec = mkVec nilCon consCon aTy 0 []
innerVecTy = mkTyConApp vecTcNm [LitTy (NumTy 0), aTy]
retVec = mkVec nilCon consCon innerVecTy n (replicate (fromInteger n) nilVec)
in changed retVec
go _ ty = error $ $(curLoc) ++ "reduceUnconcat: argument does not have a vector type: " ++ showPpr ty
reduceUnconcat _ _ _ _ = error $ $(curLoc) ++ "reduceUnconcat: unimplemented"
-- | Replace an application of the @Clash.Sized.Vector.transpose@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.transpose@
reduceTranspose :: Integer -- ^ Length of the result vector
-> Integer -- ^ Length of the elements of the result vector
-> Type -- ^ Element type
-> Term -- ^ Argument vector
-> NormalizeSession Term
reduceTranspose n 0 aTy arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= let nilVec = mkVec nilCon consCon aTy 0 []
innerVecTy = mkTyConApp vecTcNm [LitTy (NumTy 0), aTy]
retVec = mkVec nilCon consCon innerVecTy n (replicate (fromInteger n) nilVec)
in changed retVec
go _ ty = error $ $(curLoc) ++ "reduceTranspose: argument does not have a vector type: " ++ showPpr ty
reduceTranspose _ _ _ _ = error $ $(curLoc) ++ "reduceTranspose: unimplemented"
reduceReplicate :: Integer
-> Type
-> Type
-> Term
-> NormalizeSession Term
reduceReplicate n aTy eTy arg = do
tcm <- Lens.view tcCache
go tcm eTy
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= let retVec = mkVec nilCon consCon aTy n (replicate (fromInteger n) arg)
in changed retVec
go _ ty = error $ $(curLoc) ++ "reduceReplicate: argument does not have a vector type: " ++ showPpr ty
-- TODO: Take a shortcut when given index is a literal. Right now, this function
-- TODO: simply creates a case statement for every element in the vector, which
-- TODO: Clash will eliminate one-by-one if the index turned out to be literal.
-- TODO: It would of course be best to not create the cases in the first place!
reduceReplace_int
:: InScopeSet
-> Integer
-- ^ Size of vector
-> Type
-- ^ Type of vector element
-> Type
-- ^ Type of vector
-> Term
-- ^ Vector
-> Term
-- ^ Index
-> Term
-- ^ Element
-> NormalizeSession Term
reduceReplace_int is0 n aTy vTy v i newA = do
tcm <- Lens.view tcCache
go tcm vTy
where
-- Basically creates:
--
-- case eqInt i0 curI of
-- True -> newA
-- _ -> oldA
--
-- where:
--
-- - curI is the index of the current element, which we statically know
-- - i0 is the index given to replace_int
-- - newA is the element given to replace_int as a replacement for..
-- - oldA; an element at index curI
--
replace_intElement
:: TyConMap
-- ^ TyCon map
-> DataCon
-- Int datacon
-> Type
-- Int type
-> Term
-- ^ Element in vector
-> Integer
-- ^
-> Term
replace_intElement tcm iDc iTy oldA elIndex = case0
where
(Just boolTc) = lookupUniqMap (getKey boolTyConKey) tcm
[_,trueDc] = tyConDataCons boolTc
eqInt = eqIntPrim iTy (mkTyConApp (tyConName boolTc) [])
case0 = Case (mkApps eqInt [Left i
,Left (mkApps (Data iDc)
[Left (Literal (IntLiteral elIndex))])
])
aTy
[(DefaultPat, oldA)
,(DataPat trueDc [] [], newA)
]
-- Equality on lifted Int that returns a Bool
eqIntPrim
:: Type
-> Type
-> Term
eqIntPrim intTy boolTy =
Prim (PrimInfo
"Clash.Transformations.eqInt"
(mkFunTy intTy (mkFunTy intTy boolTy))
WorkVariable
SingleResult )
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [nilCon,consCon] <- tyConDataCons vecTc
= do
-- Get data constructors of 'Int'
uniqs0 <- Lens.use uniqSupply
let iTy = termType tcm i
(TyConApp iTcNm _) = tyView iTy
(Just iTc) = lookupUniqMap iTcNm tcm
[iDc] = tyConDataCons iTc
-- Get elements from vector
(uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems
uniqs0
is0
consCon
aTy
'I'
n
v
-- Replace every element with (if i == elIndex then newA else oldA)
let replacedEls = zipWith (replace_intElement tcm iDc iTy) vars [0..]
lbody = mkVec nilCon consCon aTy n replacedEls
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceReplace_int: argument does not have "
++ "a vector type: " ++ showPpr ty
-- TODO: Take a shortcut when given index is a literal. Right now, this function
-- TODO: simply creates a case statement for every element in the vector, which
-- TODO: Clash will eliminate one-by-one if the index turned out to be literal.
-- TODO: It would of course be best to not create the cases in the first place!
reduceIndex_int
:: InScopeSet
-> Integer
-- ^ Size of vector
-> Type
-- ^ Type of vector element
-> Term
-- ^ Vector
-> Term
-- ^ Index
-> NormalizeSession Term
reduceIndex_int is0 n aTy v i = do
tcm <- Lens.view tcCache
let vTy = termType tcm v
go tcm vTy
where
-- Basically creates:
--
-- case eqInt i0 curI of
-- True -> curA
-- _ -> next
--
-- where:
--
-- - curI is the index of the current element, which we statically know
-- - i0 is the index given to index_int
-- - curA is the element at index curI
-- - next; the value if the current index is not equal to index argument
--
index_intElement
:: TyConMap
-- ^ TyCon map
-> DataCon
-- Int datacon
-> Type
-- Int type
-> (Term, Integer)
-- ^ Element in the vector, and its corresponding index
-> Term
-- ^ The rest
-> Term
index_intElement tcm iDc iTy (cur,elIndex) next = case0
where
(Just boolTc) = lookupUniqMap (getKey boolTyConKey) tcm
[_,trueDc] = tyConDataCons boolTc
eqInt = eqIntPrim iTy (mkTyConApp (tyConName boolTc) [])
case0 = Case (mkApps eqInt [Left i
,Left (mkApps (Data iDc)
[Left (Literal (IntLiteral elIndex))])
])
aTy
[(DefaultPat, next)
,(DataPat trueDc [] [], cur)
]
-- Equality on lifted Int that returns a Bool
eqIntPrim
:: Type
-> Type
-> Term
eqIntPrim intTy boolTy =
Prim ( PrimInfo
"Clash.Transformations.eqInt"
(mkFunTy intTy (mkFunTy intTy boolTy))
WorkVariable
SingleResult )
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_nilCon,consCon] <- tyConDataCons vecTc
= do
-- Get data constructors of 'Int'
uniqs0 <- Lens.use uniqSupply
let iTy = termType tcm i
(TyConApp iTcNm _) = tyView iTy
(Just iTc) = lookupUniqMap iTcNm tcm
[iDc] = tyConDataCons iTc
-- Get elements from vector
(uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems
uniqs0
is0
consCon
aTy
'I'
n
v
-- Build a right-biased tree of case-expressions
let indexed = foldr (index_intElement tcm iDc iTy)
(undefinedTm aTy)
(zip vars [0..])
lb = Letrec (init elems) indexed
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "indexReplace_int: argument does not have "
++ "a vector type: " ++ showPpr ty
-- | Replace an application of the @Clash.Sized.Vector.dtfold@ primitive on
-- vectors of a known length @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.Vector.dtfold@
reduceDTFold
:: InScopeSet
-> Integer -- ^ Length of the vector
-> Type -- ^ Element type of the argument vector
-> Term -- ^ Function to convert elements with
-> Term -- ^ Function to combine branches with
-> Term -- ^ The vector to fold
-> NormalizeSession Term
reduceDTFold inScope n aTy lrFun brFun arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp vecTcNm _)
| (Just vecTc) <- lookupUniqMap vecTcNm tcm
, nameOcc vecTcNm == "Clash.Sized.Vector.Vec"
, [_,consCon] <- tyConDataCons vecTc
= do uniqs0 <- Lens.use uniqSupply
let (uniqs1,(vars,elems)) = second (second concat . unzip)
$ extractElems uniqs0 inScope consCon aTy
'T' (2^n) arg
(_ltv:Right snTy:_,_) = splitFunForallTy (termType tcm brFun)
(TyConApp snatTcNm _) = tyView snTy
(Just snatTc) = lookupUniqMap snatTcNm tcm
[snatDc] = tyConDataCons snatTc
lbody = doFold (buildSNat snatDc) (n-1) vars
lb = Letrec (init elems) lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceDTFold: argument does not have a vector type: " ++ showPpr ty
doFold :: (Integer -> Term) -> Integer -> [Term] -> Term
doFold _ _ [x] = mkApps lrFun [Left x]
doFold snDc k xs =
let (xsL,xsR) = splitAt (2^k) xs
k' = k-1
eL = doFold snDc k' xsL
eR = doFold snDc k' xsR
in mkApps brFun [Right (LitTy (NumTy k))
,Left (snDc k)
,Left eL
,Left eR
]
-- | Replace an application of the @Clash.Sized.RTree.tdfold@ primitive on
-- trees of a known depth @n@, by the fully unrolled recursive "definition"
-- of @Clash.Sized.RTree.tdfold@
reduceTFold
:: InScopeSet
-> Integer -- ^ Depth of the tree
-> Type -- ^ Element type of the argument tree
-> Term -- ^ Function to convert elements with
-> Term -- ^ Function to combine branches with
-> Term -- ^ The tree to fold
-> NormalizeSession Term
reduceTFold inScope n aTy lrFun brFun arg = do
tcm <- Lens.view tcCache
let ty = termType tcm arg
go tcm ty
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp treeTcNm _)
| (Just treeTc) <- lookupUniqMap treeTcNm tcm
, nameOcc treeTcNm == "Clash.Sized.RTree.RTree"
, [lrCon,brCon] <- tyConDataCons treeTc
= do uniqs0 <- Lens.use uniqSupply
let (uniqs1,(vars,elems)) = extractTElems uniqs0 inScope lrCon brCon aTy 'T' n arg
(_ltv:Right snTy:_,_) = splitFunForallTy (termType tcm brFun)
(TyConApp snatTcNm _) = tyView snTy
(Just snatTc) = lookupUniqMap snatTcNm tcm
[snatDc] = tyConDataCons snatTc
lbody = doFold (buildSNat snatDc) (n-1) vars
lb = Letrec elems lbody
uniqSupply Lens..= uniqs1
changed lb
go _ ty = error $ $(curLoc) ++ "reduceTFold: argument does not have a tree type: " ++ showPpr ty
doFold _ _ [x] = mkApps lrFun [Left x]
doFold snDc k xs =
let (xsL,xsR) = splitAt (length xs `div` 2) xs
k' = k-1
eL = doFold snDc k' xsL
eR = doFold snDc k' xsR
in mkApps brFun [Right (LitTy (NumTy k))
,Left (snDc k)
,Left eL
,Left eR
]
reduceTReplicate :: Integer -- ^ Depth of the tree
-> Type -- ^ Element type
-> Type -- ^ Result type
-> Term -- ^ Element
-> NormalizeSession Term
reduceTReplicate n aTy eTy arg = do
tcm <- Lens.view tcCache
go tcm eTy
where
go tcm (coreView1 tcm -> Just ty') = go tcm ty'
go tcm (tyView -> TyConApp treeTcNm _)
| (Just treeTc) <- lookupUniqMap treeTcNm tcm
, nameOcc treeTcNm == "Clash.Sized.RTree.RTree"
, [lrCon,brCon] <- tyConDataCons treeTc
= let retVec = mkRTree lrCon brCon aTy n (replicate (2^n) arg)
in changed retVec
go _ ty = error $ $(curLoc) ++ "reduceTReplicate: argument does not have a RTree type: " ++ showPpr ty
buildSNat :: DataCon -> Integer -> Term
buildSNat snatDc i =
mkApps (Data snatDc)
[Right (LitTy (NumTy i))
,Left (Literal (NaturalLiteral (toInteger i)))
]