[Bug tree-optimization/110807] Copy list initialisation of a vector raises a warning with -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110807

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Slightly reduced:
#include <vector>

std::vector<bool> byCallSpread;
void f()
{
  byCallSpread = {true};
}