Miles Bader <miles@xxxxxxx> writes: > tuple_test(std::tuple<A> const&): > movq (%rdi), %rax > movq (%rax), %rax > jmp *%rax This is pretty hard to justify. Please consider filing a missed-optimization bug report. Thanks. The tuple support relies on very new code in the C++ frontend, for variadic templates, so it's not surprising that there are some problems. The std::pair class is just a struct with two elements. Ian
