[Bug c++/53990] wrong "optimisation": automatic variable doesn't removed at fuction exit

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53990

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-17 
08:02:56 UTC ---
See http://en.wikipedia.org/wiki/Copy_elision and
http://en.wikipedia.org/wiki/Return_value_optimization