more cache inits

Author: ChrisRackauckas

src/factorization.jl

@@ -200,13 +200,37 @@ end
 init_cacheval(alg::GenericFactorization{typeof(lu)}, A, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
 init_cacheval(alg::GenericFactorization{typeof(lu!)}, A, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
 
+init_cacheval(alg::GenericFactorization{typeof(lu)}, A::StridedMatrix{<:LinearAlgebra.BlasFloat}, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
+init_cacheval(alg::GenericFactorization{typeof(lu!)}, A::StridedMatrix{<:LinearAlgebra.BlasFloat}, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
 init_cacheval(alg::GenericFactorization{typeof(lu)}, A::Diagonal, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = Diagonal(inv.(A.diag))
 init_cacheval(alg::GenericFactorization{typeof(lu)}, A::Tridiagonal, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
 init_cacheval(alg::GenericFactorization{typeof(lu!)}, A::Diagonal, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = Diagonal(inv.(A.diag))
 init_cacheval(alg::GenericFactorization{typeof(lu!)}, A::Tridiagonal, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
 
 init_cacheval(alg::GenericFactorization, A::Diagonal, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = Diagonal(inv.(A.diag))
 init_cacheval(alg::GenericFactorization, A::Tridiagonal, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) = ArrayInterface.lu_instance(A)
+init_cacheval(alg::GenericFactorization, A::SymTridiagonal{T,V}, b, u, Pl, Pr, maxiters, abstol, reltol, verbose) where {T,V} = LinearAlgebra.LDLt{T,SymTridiagonal{T,V}}(A)
+
+function init_cacheval(alg::Union{GenericFactorization,GenericFactorization{typeof(bunchkaufman!)},GenericFactorization{typeof(bunchkaufman)}},
+                       A::Union{Hermitian,Symmetric}, b, u, Pl, Pr, maxiters, abstol, reltol, verbose)
+    BunchKaufman(A.data, Array(1:size(A,1)), A.uplo, true, false, 0)
+end
+
+function init_cacheval(alg::Union{GenericFactorization,GenericFactorization{typeof(bunchkaufman!)},GenericFactorization{typeof(bunchkaufman)}},
+                       A::StridedMatrix{<:LinearAlgebra.BlasFloat}, b, u, Pl, Pr, maxiters, abstol, reltol, verbose)
+   if eltype(A) <: Complex
+       return bunchkaufman!(Hermitian(A))
+   else
+       return bunchkaufman!(Symmetric(A))
+   end
+end
+
+function init_cacheval(alg, A::Union{Hermitian,Symmetric}, b, u, Pl, Pr, maxiters, abstol, reltol, verbose)
+    BunchKaufman(A.data, Array(1:size(A,1)), A.uplo, true, false, 0)
+end
+
+# Fallback, tries to make nonsingular and just factorizes
+# Try to never use it.
 function init_cacheval(alg::Union{QRFactorization,SVDFactorization,GenericFactorization}, A, b, u, Pl, Pr, maxiters, abstol, reltol, verbose)
     newA = copy(A)
     fill!(newA,true)