review (XS) for 6975027: use of movptr to set length of array

[Tom Rodriguez]

http://cr.openjdk.java.net/~never/6975027/

6975027: use of movptr to set length of array
Reviewed-by:

Some C1 slow path code for setting the length of an array that's used
to fill dead space in a tlab is using movptr instead of movl.