Node arguments to type casts can have names too.  This code needs to be majorly refactored, but this spot bugfix allows things like:
Node arguments to type casts can have names too.  This code
needs to be majorly refactored, but this spot bugfix allows
things like:

 def vmrghw_shuffle : PatFrag<(ops node:$lhs, node:$rhs),
                             (vector_shuffle (v4i32 node:$lhs), node:$rhs), [{
...



git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@97952 91177308-0d34-0410-b5e6-96231b3b80d8

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