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

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

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

--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #6)
> The mma_assemble_pair/mma_assemble_acc patterns both generate lxv or lxvp
> at, which both use a DQ offset and we already have function to
> test for that.  The following change fixes the ICE, so I'll give it a spin
> on regtesting.

That looks fine; if that is the only change you need it is pre-approved
for trunk.  Thanks!