Add some simplifications of selects
Add some simplifications of selects

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