[Bug bootstrap/116146] Split insn-recog.cc

[mark at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116146

--- Comment #4 from Mark Wielaard <mark at gcc dot gnu.org> ---
(In reply to Robin Dapp from comment #3)
> On riscv insn-output is the largest file right now as well.

Note that size matters, but the largest file does not always take the longest
to compile. On a risc-v setup insn-recog.cc and the largest insn-emit-nn.cc
file take hours more to build than any of the other larger files.