Add non-const tracing accessors
Add non-const tracing accessors


Former-commit-id: 6b577f9c047bce182c8a9f6d473470f7ec2a8ff6 [formerly dc8909ed8c74f51d33ff05ff56fa2f00a4528574]
Former-commit-id: 18babaa502579bd4018d00fe2c0532398105f67c
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide