http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57583
--- Comment #4 from Hans-Peter Nilsson <hp at gcc dot gnu.org> --- (In reply to Mikael Pettersson from comment #3) > It's not too difficult to make the m68k backend use 32-bit offsets in its > jump tables (adjust CASE_VECTOR_MODE, ASM_OUTPUT_ADDR_DIFF_ELT, > ASM_RETURN_CASE_JUMP, drop the sign-extend from the tablejump expander, > likewise in the unnamed insn that matches the output from the tablejump > expander). I have a crude patch to do that, Does your patch define CASE_VECTOR_SHORTEN_MODE? Otherwise that'll probably be one of the first review comments. > and make it compile-time > selectable via an option. FWIW, -mbigtable for sh. > However, it seems to me that the compiler should be able to figure out for > itself if a given jump table might need 32-bit offsets. The length insn attribute needs to be defined in order to take advantage of the existing machinery. It seems it currently isn't, for m68k.
