rebased vectorize loops to start from 0 before vectorizing
rebased vectorize loops to start from 0 before vectorizing

kgnk/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,ronen/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,psuriana/Halide,psuriana/Halide,psuriana/Halide,jiawen/Halide,kgnk/Halide,jiawen/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,jiawen/Halide,psuriana/Halide,jiawen/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,kgnk/Halide,ronen/Halide,psuriana/Halide,jiawen/Halide,kgnk/Halide