GCC Middle and Back End API Reference

Data Fields  
int  complexity 
int  entryvals 
This data structure holds information about the depth of a variable expansion.
int expand_depth_struct::complexity 
This measures the complexity of the expanded expression. It grows by one for each level of expansion that adds more than one operand.
Referenced by delete_slot_part().
int expand_depth_struct::entryvals 
This counts the number of ENTRY_VALUE expressions in an expansion. We want to minimize their use.
Referenced by delete_slot_part().