rjmccall added a comment.

In http://reviews.llvm.org/D11859#225384, @Prazek wrote:

> In http://reviews.llvm.org/D11859#225025, @rjmccall wrote:
>
> > Mostly LGTM.  Are you going to emit assumptions for vbptrs in a separate 
> > patch?
>
>
> I wasn't planning to. I am focusing now on upgrading GVN for using new 
> invariant.barrier metadata.


I won't argue with prioritizing Itanium over MS work, if that's your 
motivation, because that's obviously your call to make, and certainly that's 
how I would weigh things if I were doing this work.  If you're interested in 
both, though, I would guess that vbptr assumptions would be particularly 
valuable — constructing objects and immediately converting them to a base class 
is pretty common in a lot of idioms.


http://reviews.llvm.org/D11859



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