[Bug middle-end/90340] Not optimal code when compiling switch-case for size, code increase +35%

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90340

--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Fredrik Hederstierna from comment #16)
> Still you cannot reach code size as gcc-8.3.0 ? So something in new
> switch-case compilation generates larger code still?

The biggest difference from GCC 8 is that we can emit jump table for a subset
of cases. That's what happening for the reported test-case. In generate, GCC 9+
sees more opportunities for jump tables.