[Bug target/96768] -mpure-code produces switch tables for thumb-1

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96768

--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> ---
That's what I replied in the original PR94538, but Wilco said the best option
was to turn off switch tables:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94538#c14

See also another comment from him:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94538#c16 related to immediate
loads from rodata/bss.