Ping: Add a Scalarizer pass

[Nadav Rotem]

Looks good to me. 

On Nov 22, 2013, at 6:43 AM, Richard Sandiford <rsandifo at linux.vnet.ibm.com> wrote:

> Pekka Jääskeläinen <pekka.jaaskelainen at tut.fi> writes:
>> LGTM.
>> 
>> IMHO this could be committed to the 3.4 branch as it's not part
>> of the default pass chain.
> 
> Thanks Pekka.  Nadav, since you had comments about the original version,
> is this OK with you too?
> 
> Thanks,
> Richard
> 
>> On 11/20/2013 01:06 PM, Richard Sandiford wrote:
>>> Ping for this update, which I think addresses all review comments so far.
>>> 
>>> Thanks,
>>> Richard
>>> 
>>>> Remove use of TargetTransformInfo.  Do not add the pass to
>>>> PassManagerBuilder.
>>>> 
>>>> We also talked about whether to use a reverse post-order traversal,
>>>> but I don't think it's worth it in the use cases I have.  It could
>>>> easily be added later it we find a counterexample though.
>>> 
>>> http://llvm-reviews.chandlerc.com/D2112
>>> 
>>> 
>>> 
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>