DomainIR: convert UpperTriangular variable to regular matrix
DomainIR: convert UpperTriangular variable to regular matrix

convert UpperTriangular variable coming from chol() to regular matrix to simplify analysis (lasso example)
UpperTriangular has extra index bounds checks but we don't fully check bounds now

malekbr/julia-to-tiramisu,IntelLabs/ParallelAccelerator.jl