Modified SpecializeBranchedLoops to use new visitors from BranchVisitors.
Modified SpecializeBranchedLoops to use new visitors from BranchVisitors.


Former-commit-id: 0b2318081d0e89d3f1ca627cb82f7907e7bc16c6
darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide