Return value optimization support

ArmitageIII87 · 2005-09-02T00:44:41+00:00

Quick question, has anyone been able to prove whether or not return value optimization is taking place with the MSVC .NET 2003 compiler. I tried an example with full optimizations turned on and it appeared to not work. Has anyone else tried to verify this. I understand that this is a transformation GCC supports if I'm not mistaking. Thanks, Will

Yes, and it works -- it is even applied in debug mode. How exactly are you trying to test it?

Edit: I take that back! I could have sworn 7.1 performed the operation (8.0 does not seem to apply it either), but after testing it you are correct -- it is not applied. It doesn't have a problem with RVO, however.

Edit2: Wait, you did say RVO not NRVO, in which case yes, 7.1 does perform RVO. How are you trying to test it that makes you believe it is not applied? I am tired :)

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