Programs objdump, nm, addr2line, c++filt, gprof, do not demangle cloned function names, such as _ZN1C3fooEi.isra.0. Could be C::foo.isra.0(int) or C::foo(int).isra.0 (?)
I think it is more a gcc feature request since gcc and binutils share the same demangler.
It's already reported: <http://gcc.gnu.org/PR40831>.
Cary Coutant fixed it in GCC.
Fixed.