[Patch,AVR]: Implement PR50446

[Denis Chertykov]

2011/9/22 Georg-Johann Lay <avr@gjlay.de>:
> This adds rotate left/right by 1 for HI and SI and rotates by QI.
>
> It's all straight forward. The test case in the PR leads to generation of the
> new rotate patterns.
>
> Passed without regressions.
>
> Ok?

Ok.

Denis.