[Bug target/83969] [8 Regression] ICE in final_scan_insn, at final.c:2997 (error: could not split insn) for powerpc targets

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83969

--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
r256598 deleted *movti_string (and all other string instructions); does
this bug still happen?  That patch was committed 20180112.