On 10/11/18 3:09 PM, Paul Koning wrote:
> Updated with an additional item I just debugged.
>
> Since the code that uses the doloop_end pattern does not check the operand
> mode as given in the pattern, the pattern itself may need to do this, and
> that was not documented. In addition, if the doloop_end pattern is a
> define_expand, there must be a define_insn (or define_insn_and_split)
> matching the generated pattern. I had a define_split instead, and the result
> was an ICE in loop optimization (loop2_done pass).
>
> This patch adds that information. It also updates the example to reflect
> this.
>
> Ok for trunk?
>
> paul
>
> ChangeLog:
>
> 2018-10-11 Paul Koning <n...@arrl.net>
>
> * doc/md.texi (doloop_end): Document that the pattern code may
> need to check operand mode.
OK.
jeff
