[Bug middle-end/90354] [7.3 regression] Skip the not first insn when traversing the insn node

[zhongyunde at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90354

--- Comment #4 from vfdff <zhongyunde at huawei dot com> ---
Another issue, it is not suiteable for some target supported more than 2 insns 
issued together ? But the following code already exist very long without
problem.

  /* ??? Hopefully multiple delay slots are not annulled.  */
  gcc_assert (n == 2);