PATCH: add assertion to find_reg_note()

[Ian Lance Taylor]

Ben Elliston <bje@au1.ibm.com> writes:

> 2006-01-11  Ben Elliston  <bje@au.ibm.com>
> 
>         * rtlanal.c (find_reg_note): Assert insn is not null.

This is OK.

Thanks.

Ian