[Bug target/58269] [4.9 Regression] ICE when building libobjc on x86_64-apple-darwin* after revision 201915

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58269

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
note this *breaks bootstrap* for the normal language set.

reduced testcase:

int foo (int a, ...)
{
  void *args;
  args = __builtin_apply_args ();
  return 0;
}

/src/test/pr58269.c:7:1: internal compiler error: in check_rtl, at lra.c:2034