'sizeof(x)' is parsed differently from 'sizeof x'

[clccc]

There is a "USE" edge from argument 'sizeof y' to symbol-node 'y' in the graph of 'memcpy ( x , y , sizeof y )'.
But there is not a "USE" edge from argument 'sizeof ( y )' to symbol-node 'y' in the graph of 'memcpy ( x , y , sizeof (y))'.
Could you fix it? Thanks!