[Bug target/89190] [8 regression][ARM] armv8-m.base invalid ldm ICE

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89190

--- Comment #7 from Wilco <wilco at gcc dot gnu.org> ---
Backported to GCC8 branch, and added missing testcase to trunk and GCC9. All
fixed.