https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947 Bug 53947 depends on bug 87062, which changed state.
Bug 87062 Summary: mis-optimized code with -O3 and std::pair https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87062 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE