[Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87871

--- Comment #50 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The insn is

(insn 7 3 8 2 (parallel [
            (set (reg:CC 100 cc)
                (compare:CC (reg:SI 0 r0 [116])
                    (const_int 0 [0])))
            (set (reg/v:SI 4 r4 [orig:112 a ] [112])
                (reg:SI 0 r0 [116]))
        ]) "ira-shrinkwrap-prep-1.c":17:6 188 {*movsi_compare0}
     (nil))

and that isn't split, and then prepare_shrink_wrap gives up on it.