On Mon, Mar 25, 2019 at 05:12:05PM -0600, Jeff Law wrote: > To touch on one of the issues I raised. AFAICT the schedulers don't use > SCHED_GROUP_P for dealing with tablejumps. They're used for > cc0-user/setter, fused insns and the like. That's a bit of a surprise. > > Given that the table isn't actually associated with the block with the > tablejump, SCHED_GROUP_P might actually create a whole new set of problems. > > Why oh why is the jump table data not actually attached to the tablejump > insn itself. Nearly 30 years of working on GCC and I can't answer that one.
It somewhat makes sense for targets where the jump table is emitted in the text section; we then need to know its size for jumps over it, etc. Segher
