Common Tail Elimination

[Perry Smith <pedz@xxxxxxxxxxxxxxxx>]

Does gcc/g++ have what I think is called "common tail elimination"?   
If a function does: step a, step b, step c, return val; in more than  
one place, will the common code be pulled out and branched to in  
order to reduce the size of the code?  This may be contrary to most  
optimizations since it introduces a branch which costs time but the  
benefit is smaller code size.

Thanks,
Perry