Fix PR 65177: diamonds are not valid execution threads for jump threading

[Jeff Law]

On 03/20/2015 12:17 PM, Sebastian Pop wrote:
> Richard Biener wrote:
>> On Thu, Mar 19, 2015 at 8:54 PM, Sebastian Pop <sebpop@gmail.com> wrote:
>>> Richard Biener wrote:
>>>> please instead fixup after copy_bbs in duplicate_seme_region.
>>>>
>>>
>>> Thanks for the review.
>>> Attached patch that does not modify copy_bbs.
>>> Fixes make check in hmmer and make check RUNTESTFLAGS=tree-ssa.exp
>>>
>>> Full bootstrap and regtest in progress on x86_64-linux.  Ok for trunk?
>>
>> Looks good to me.  Please also add a testcase.
>
> Attached.  I will wait to commit until I have a green light from Jeff.
Sorry, dealing with some non-technical stuff right now.  I should have 
time to look at this over the weekend.

jeff