Call IRVisitor2::visit(), not mutate()
Call IRVisitor2::visit(), not mutate()


Former-commit-id: a60f5dbd5206922049c7217d1f90641ee44ed529 [formerly 40a245714ac7cf8c8463d5ffcf124885f9ca0579]
Former-commit-id: 877e33c5450acc9a9a326ce13c55490ebeb87e11
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide