[Bug target/99041] combine creates invalid address which ICEs in decompose_normal_address

[bergner at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99041

--- Comment #9 from Peter Bergner <bergner at gcc dot gnu.org> ---
Fixed on trunk.

I will check whether we need this on the GCC10 branch as well.  I believe we
probably will.