fill special cases

Author: dlfivefifty

src/mul.jl

@@ -182,6 +182,8 @@ macro layoutmul(Typ)
         Base.:*(A::AbstractMatrix, B::$Typ) = ArrayLayouts.mul(A,B)
         Base.:*(A::LinearAlgebra.AdjointAbsVec, B::$Typ) = ArrayLayouts.mul(A,B)
         Base.:*(A::LinearAlgebra.TransposeAbsVec, B::$Typ) = ArrayLayouts.mul(A,B)
+        Base.:*(A::LinearAlgebra.AdjointAbsVec{<:Any,<:Zeros{<:Any,1}}, B::$Typ) = ArrayLayouts.mul(A,B)
+        Base.:*(A::LinearAlgebra.TransposeAbsVec{<:Any,<:Zeros{<:Any,1}}, B::$Typ) = ArrayLayouts.mul(A,B)
 
         Base.:*(A::LinearAlgebra.AbstractQ, B::$Typ) = ArrayLayouts.mul(A,B)
         Base.:*(A::$Typ, B::LinearAlgebra.AbstractQ) = ArrayLayouts.mul(A,B)
@@ -224,6 +226,7 @@ macro layoutmul(Typ)
             Base.:*(A::LinearAlgebra.TransposeAbsVec, B::$Mod{<:Any,<:$Typ}) = ArrayLayouts.mul(A,B)
             Base.:*(A::$Mod{<:Any,<:$Typ}, B::AbstractVector) = ArrayLayouts.mul(A,B)
             Base.:*(A::$Mod{<:Any,<:$Typ}, B::ArrayLayouts.LayoutVector) = ArrayLayouts.mul(A,B)
+            Base.:*(A::$Mod{<:Any,<:$Typ}, B::Zeros{<:Any,1}) = ArrayLayouts.mul(A,B)
 
             Base.:*(A::$Mod{<:Any,<:$Typ}, B::$Typ) = ArrayLayouts.mul(A,B)
             Base.:*(A::$Typ, B::$Mod{<:Any,<:$Typ}) = ArrayLayouts.mul(A,B)
@@ -267,6 +270,8 @@ dot(a, b) = materialize(Dot(a, b))
 @inline LinearAlgebra.dot(a::LayoutArray, b::LayoutArray) = dot(a,b)
 @inline LinearAlgebra.dot(a::LayoutArray, b::AbstractArray) = dot(a,b)
 @inline LinearAlgebra.dot(a::AbstractArray, b::LayoutArray) = dot(a,b)
+@inline LinearAlgebra.dot(a::LayoutVector, b::AbstractFill{<:Any,1}) = FillArrays._fill_dot(a,b)
+@inline LinearAlgebra.dot(a::AbstractFill{<:Any,1}, b::LayoutVector) = FillArrays._fill_dot(a,b)
 @inline LinearAlgebra.dot(a::LayoutArray{<:Number}, b::SparseArrays.SparseVectorUnion{<:Number}) = dot(a,b)
 @inline LinearAlgebra.dot(a::SparseArrays.SparseVectorUnion{<:Number}, b::LayoutArray{<:Number}) = dot(a,b)
 

src/muladd.jl

@@ -412,4 +412,9 @@ function similar(M::MulAdd{<:Any,<:DualLayout,ZerosLayout}, ::Type{T}, (x,y)) wh
     @assert length(x) == 1
     trans = transtype(M.B)
     trans(similar(trans(M.B), T, y))
-end
+end
+
+const ZerosLayouts = Union{ZerosLayout,DualLayout{ZerosLayout}}
+copy(M::MulAdd{<:ZerosLayouts, <:ZerosLayouts, <:ZerosLayouts}) = M.C
+copy(M::MulAdd{<:ZerosLayouts, <:Any, <:ZerosLayouts}) = M.C
+copy(M::MulAdd{<:Any, <:ZerosLayouts, <:ZerosLayouts}) = M.C