[PATCH] [X86][SSE] Vector integer/float conversion memory folding (cvttps2dq / cvttpd2dq)

[Quentin Colombet]

> Many of the Int_CVT and CVT 'scalar' folds look suspicious and I wish to more thoroughly test them, but would prefer to do that separately from this patch.

Sounds good to me.

Please add some CHECK-LABELs for the functions you added for testing.
With that, LGTM (no need to send an updated review).

Thanks,
Q.

http://reviews.llvm.org/D6001