basic_block flags, BB_VISITED

[Nathan Sidwell]

On 10/14/16 05:28, Richard Biener wrote:

> The BB_VISITED flag has indetermined state at the beginning of a pass.
> You have to ensure it is cleared yourself.

In that case the openacc (&nvptx?) passes should be modified to clear the flags 
at their start, rather than at their end.

nathan