Fix in pointer discipline per comment from Andrew.
Fix in pointer discipline per comment from Andrew.

(This is a correctness fix for older llvm versions.)


Former-commit-id: 76332212925df5432dcfbab87dadc7057d8a28f6
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide