[PATCH] Allow 0-weight branches in BranchProbabilityInfo.

[Hans Wennborg]

On Wed, May 6, 2015 at 10:19 AM, Diego Novillo <dnovillo at google.com> wrote:
> On Wed, May 6, 2015 at 10:09 AM, Duncan P. N. Exon Smith
> <dexonsmith at apple.com> wrote:
>
>>
>> This looks like `visitSwitch()`.  I don't see why we can't handle a
>> weight of 0 here.
>>
>> It would be easy to change `SelectionDAGBuilder::splitWorkItem` to be
>> resilient to weights of 0 instead:
>
> I was going for mechanical changes in this patch. I want to have
> something that's easy to bisect if I happen to break something else.
>
> Perhaps a followup patch?

This sounds reasonable to me. The switch part lgtm.