Better handle int32

Author: ChrisRackauckas

ext/LinearSolveSparseArraysExt.jl

@@ -80,13 +80,21 @@ function LinearSolve.init_cacheval(
 end
 
 function LinearSolve.init_cacheval(
-        alg::Union{LUFactorization, GenericLUFactorization}, A::AbstractSparseArray{Float64, Int}, b, u,
+        alg::Union{LUFactorization, GenericLUFactorization}, A::AbstractSparseArray{Float64, Int64}, b, u,
         Pl, Pr,
         maxiters::Int, abstol, reltol,
         verbose::Bool, assumptions::OperatorAssumptions)
     PREALLOCATED_UMFPACK
 end
 
+function LinearSolve.init_cacheval(
+        alg::Union{LUFactorization, GenericLUFactorization}, A::AbstractSparseArray{Float64, Int32}, b, u,
+        Pl, Pr,
+        maxiters::Int, abstol, reltol,
+        verbose::Bool, assumptions::OperatorAssumptions)
+    SparseArrays.UMFPACK.UmfpackLU(SparseMatrixCSC{Float64, Int32}(0, 0, [Int32(1)], Int32[], Float64[]))
+end
+
 function LinearSolve.init_cacheval(
         alg::UMFPACKFactorization, A::AbstractSparseArray{Float64, Int}, b, u, Pl, Pr,
         maxiters::Int, abstol,
@@ -143,13 +151,21 @@ function LinearSolve.init_cacheval(
 end
 
 function LinearSolve.init_cacheval(
-        alg::KLUFactorization, A::AbstractSparseArray{Float64, Int}, b, u, Pl, Pr,
+        alg::KLUFactorization, A::AbstractSparseArray{Float64, Int64}, b, u, Pl, Pr,
         maxiters::Int, abstol,
         reltol,
         verbose::Bool, assumptions::OperatorAssumptions)
     PREALLOCATED_KLU
 end
 
+function LinearSolve.init_cacheval(
+        alg::KLUFactorization, A::AbstractSparseArray{Float64, Int32}, b, u, Pl, Pr,
+        maxiters::Int, abstol,
+        reltol,
+        verbose::Bool, assumptions::OperatorAssumptions)
+    KLU.KLUFactorization(SparseMatrixCSC{Float64, Int32}(0, 0, [Int32(1)], Int32[], Float64[]))
+end
+
 # TODO: guard this against errors
 function SciMLBase.solve!(cache::LinearSolve.LinearCache, alg::KLUFactorization; kwargs...)
     A = cache.A
@@ -268,6 +284,12 @@ function LinearSolve.init_cacheval(alg::QRFactorization, A::SparseMatrixCSC{Floa
     LinearSolve.ArrayInterface.qr_instance(convert(AbstractMatrix, A), alg.pivot)
 end
 
+function LinearSolve.init_cacheval(alg::QRFactorization, A::SparseMatrixCSC{Float64, Int32}, b, u, Pl, Pr,
+        maxiters::Int, abstol, reltol, verbose::Bool,
+        assumptions::OperatorAssumptions)
+    LinearSolve.ArrayInterface.qr_instance(convert(AbstractMatrix, A), alg.pivot)
+end
+
 function LinearSolve.init_cacheval(
         alg::QRFactorization, A::Symmetric{<:Number, <:SparseMatrixCSC}, b, u, Pl, Pr,
         maxiters::Int, abstol, reltol, verbose::Bool,