[PATCH] Fix PR68067

[Jeff Law]

On 11/30/2015 01:42 AM, Richard Biener wrote:

> Yeah.  I've pondered with clearing the hashmap after each pass
> (and hope no IPA pass would redirect edges).  Or even more aggressive,
> clear the hashmap as well when we do set_cfun ().
>
> Maybe you can try that?
>
> And no, I don't think any pass expects this stuff to be live across
> passes.
I'd argue that any pass that expects this stuff to be live across a pass 
is fundamentally broken.

jeff