[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note in most cases `(subreg:DI (reg:V16HI 139 [ vect_cst__21 ]) 0) (const_int
16 [0x10])` would normally be a `vec_select` so I am shock that it is using a
subreg here ...