Updated TODO to remove unroll and add auto tuning
Updated TODO to remove unroll and add auto tuning

Former-commit-id: 593ccacad7a5f1bda5ef1bbad1c28fd5a7627c1d
Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide