PR 3897 is fixed in v3.1

[Roger Sayle]

Whilst looking for builtin bugs to fix during the code freeze, I
discovered that PR c/3897 has been fixed on the GCC mainline.  More
accurately optimizations of memcpy have been implemented in GCC.
On many glibc systems, memcpy is now also optimized by the system
headers by #include <string.h>.  However I've confirmed that the
posted testcase is correctly optimized even without the #include.

Could someone close this PR in GNATS for me?
Many thanks in advance.

Roger
--
Roger Sayle,                         E-mail: roger@eyesopen.com
OpenEye Scientific Software,         WWW: http://www.eyesopen.com/
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