dwarf2 eh for alpha

[Jeffrey A Law]

  In message < 19980902004107.A5028@dot.cygnus.com >you write:
  > For this reason I invented MD_AFTER_RTL_GENERATION, to let me go
  > through and look at such things.  Ideally, I would combine this
  > hook with FINALIZE_PIC, which is run at the same place, but is only
  > invoked if -fpic.
MD_AFTER_RTL_GENERATION is ripe for abuse.  We should look for a better
solution.  We don't want another hook like MACHDEP_REORG.

I would prefer a non-optimal solution to adding another hook like this
to the compiler.  Or we should look for a less abuseable/cleaner solution
to this problem.

Maybe try something in instantiate_virtual_regs?



jeff