This is http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22212 and is the problem blocking Ada bootstrap on x86_64-linux, it would be great to move forward on this.
Laurent On Thu, 2005-06-30 at 18:18 -0400, Richard Kenner wrote: > This function generates RTL from an expression to see how many RTL insns > it is. But this causes a problem compiling the Ada ACATS test cxa4006. > > The problem is when part of the expression has a location. In that > case, record_block_change is called and that relies on > cfun->ib_boundaries_block being set. But it isn't because we aren't > expanding stuff "for real". A kludge would be to test that field, but > what's the proper way? > > Also, seq_cost really should be looking at next_real_insn, not NEXT_INSN, > since any notes shouldn't be counted. >
