[Bug rtl-optimization/71295] [7 Regression] internal compiler error: in subreg_get_info, at rtlanal.c:3673 on arm

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71295

--- Comment #1 from ktkachov at gcc dot gnu.org ---
The function is trying to handle a V2DImode subreg of an EImode reg when it
ICEs.
From the dumps I think it's due to the instruction:
(insn 6 15 16 2 (set (subreg:V2DI (reg/v:EI 111 [ b ]) 0)
        (const_vector:V2DI [
                (const_int 1 [0x1])
                (const_int 1 [0x1])
            ])) mycrash.c:10 861 {*neon_movv2di}
     (nil))