Some MVE floating point instruction have gpr register variants that take the scalar gpr value and splat them to all lanes. In order to accept them in loops, the shuffle_vector and insert need to be sunk down into the loop, next to the instruction so that ISel can see the whole pattern.
This does that sinking for FAdd, FSub, FMul and FCmp. The patterns for mul are slightly more constrained as there are no fms variants taking register arguments.