Make OptimizeShuffles work for clamped ramp loads.
Make OptimizeShuffles work for clamped ramp loads.


Former-commit-id: 02f08a2bef995617c94132e948021a12ba3318e5
Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide