On 10/08/2018 06:20 PM, Michael Matz wrote:
> Only if you somewhere visibly add accesses to *i and *j. Without them you
> only have the "accesses" via memcpy, and as Richi says, those don't imply
> any alignment requirements. The i and j pointers might validly be char*
> pointers in disguise and hence be in fact only 1-aligned. I.e. there's
> nothing in your small example program from which GCC can infer that those
> two global pointers are in fact 2-aligned.
So all you'd actually have to say is
void f1(void)
{
*i; *j;
__builtin_memcpy (i, j, 32);
}
--
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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