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From: porton@ex-code.com (Victor Porton)
Date: Mon, 20 Jan 2003 09:12:55 +0500
Organization: Extreme Code Software (http://ex-code.com)
Subject: Eliminating copying in Gnat
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Date: 2003-01-20T04:13:43+00:00
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Is it possible to cause Gnat to not do unnecessary copying
when calling this fynction?

function Pass(X: T) return T is
  pragma Inline(Pass);
begin
  return X;
end;

If T is a controlled type, it calls Adjust 3(!) times even
if I compile with optimization ("-O3 -gnatN").

I even don't know how to check (well, without reading assembler
output) whether copying would be done in the case of
non-controlled T.

It is in Gnat-3.14p. May be it was fixed in Gnat-3.2/3.15p?