[Bug target/117818] vec_add incorrectly generates vadduwm for vector char const inputs.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117818

--- Comment #3 from Steven Munroe <munroesj at gcc dot gnu.org> ---
Tried replacing generic vec_add with specific vec_addubm
(__builtin_vec_add/__builtin_vec_vaddubm).

No joy compiler still generates vadduwm and load from ,rodata.