make genattrtab generate smaller code

[law@redhat.com]

In message <Pine.LNX.4.44.0309081108420.13736-100000@wotan.suse.de>, Michael Ma
tz writes:
 >Hmm, I'm uncertain how to proceed.  Just to see how small I could get the
 >insn-attrtab.c in the ideal case, I deactivated _all_ optimization of the
 >define_attr tree inside genattrtab so it now basically only emits
 >functions like:
I believe the "canonical" test for genattrtab optimizations was always
the MIPS port.   IIRC the MIPS port was consistently the most problematical.

You might repeat your test with a MIPS target and see what happens.

jeff