[Bug target/103548] Identical MMA assemble quads are incorrectly combined

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103548

--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
Fixed on trunk.  I'll let it bake a couple of days there before backporting to
GCC 11 & 10.