[Bug c++/39480] generated memcpy causes trouble in assignment

[falk at debian dot org]

------- Comment #19 from falk at debian dot org  2009-03-18 09:06 -------
(In reply to comment #18)
> I can't imagine an implementation of memcpy that would break when the two
> addresses are the same, it just doesn't work if one is offset but overlapping. 
> So the valgrind warning is pedantically correct, but I think it doesn't
> indicate a real safety issue.

As I mentioned in comment #6, it could go wrong if memcpy uses "cache prefetch
with write intent" instructions.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39480