This is the mail archive of the gcc-help@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [g++] make_pair inlining failure?

On Mon, Nov 28, 2011 at 2:42 PM, Marc Glisse <marc.glisse@inria.fr> wrote:
> A classic. insert takes a pair<const Key,Value> whereas make_pair produces a pair<Key,Value>, so the first thing the compiler has to do is convert one into the other, ie copy. The set of circumstances where a compiler is allowed to elide a copy is extremely restrictive.
>

Really... how restrictive exactly? Would you take issue with anything stated in

http://cpp-next.com/archive/2009/08/want-speed-pass-by-value/

Thx,

- Rob.
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]