RFA: fix bugs in likely_spilled_retval_1 / likely_spilled_retval_p (Was: Re: RFA: Fix rtl-optimization/22258)

[Joern RENNECKE]

Joern Rennecke wrote:

>  FAIL: events output
>
> What does that mean?  How can I start to debug this?
>
P.S.: I see the very same regression also with a completely disjoint set 
of patches.