On Jun 22, 2007, at 7:59 AM, Dan Gohman wrote:

> Move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits from
> TargetLowering to SelectionDAG so that they have more convenient
> access to the current DAG, in preparation for the ValueType routines
> being changed from standalone functions to members of SelectionDAG for
> the pre-legalize vector type changes.

Ah, that's also a much more logical place for them anyway.  They  
originally started out in DAGCombine, this is their third home :).   
Thanks Dan,

-Chris
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