On Apr 28, 2011, at 3:57 PM, Argyrios Kyrtzidis wrote:
> Author: akirtzidis
> Date: Thu Apr 28 17:57:55 2011
> New Revision: 130453
>
> URL: http://llvm.org/viewvc/llvm-project?rev=130453&view=rev
> Log:
> Cut down unnecessary zero'ing when value-initializing arrays of C++ objects.
>
> -C++ objects with user-declared constructor don't need zero'ing.
Are you sure that this is true? Apparently the C++ standard requires that
global variables (at least) are zero initialized and that constructors can take
advantage of this. This is apparently well defined:
struct foo {
int x;
foo() {
++x;
}
} f;
I'm pretty sure that this doesn't apply to temporaries etc, but it would be
worth checking if you haven't already.
-Chris
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