Reorder multiply-add and shift-add patterns to produce better code.
Reorder multiply-add and shift-add patterns to produce better code.

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