INSN_SCOPE changes break mips-elf

[David S. Miller]

   From: law@redhat.com
   Date: Wed, 19 Jun 2002 14:42:53 -0600
   
   mips-elf has had regressions ever since the INSN_SCOPE changes were installed
   into the tree.  While the number of regressions has gone down since the
   introduction of the INSN_SCOPE changes one regression still remains.
   
   The remaining regression is gcc.dg/debug/debug-6 where we manage to lose
   all debug information for "xyzzy".  I believe the fundamental problem is your
   code in scope_to_insns_initialize does not properly handle SEQUENCEs as
   generated by the delay slot filling pass.

For the record, this is failing on the sparc targets too.  I bet it is
failing elsewhere...