[Bug tree-optimization/19661] unnecessary atexit calls emitted for static objects with empty destructors

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19661

--- Comment #15 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The patch is able to handle all 3 testcases here even:
For the libstdc++ one:
t3.cc.123t.dce2:Deleting : __cxxabiv1::__cxa_atexit (__dt_comp , &global,
&__dso_handle);