On Mon, 6 Jan 2020, Chris Hall wrote: [description of NRVO]
Is there any way in which I can persuade the compiler that a function returning a struct does not need to worry about preserving the value of the final destination (ie the struct at %rdi) ?
Compile the file as C++ instead of C. Not that it would be forbidden in C, but the optimization happens to be in the C++ front-end. There is also an optimization pass called nrv, but it does trigger that often.
-- Marc Glisse
