Simpler implementation of SmallStack. The previous version was causing memory errors with libc++
Simpler implementation of SmallStack. The previous version was causing memory errors with libc++


Former-commit-id: a83c5c001f07c7478d25e6685a73615edc213a46
darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide