[Bug string/19907] Incorrect memcpy tests

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19907

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The branch, hjl/benchtests/master has been created
        at  c245c47ac392b70e05632abc1bc48d3ef14920be (commit)

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c245c47ac392b70e05632abc1bc48d3ef14920be

commit c245c47ac392b70e05632abc1bc48d3ef14920be
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun Apr 3 17:21:45 2016 -0700

    Copy very large data with non-temporal stores

    Add __x86_shared_non_temporal_threshold

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=97e117a1d2929e6633f834542dda1bc89b095620

commit 97e117a1d2929e6633f834542dda1bc89b095620
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Apr 4 09:38:30 2016 -0700

    Clear destination buffer set by the previous run

    Clear the destination buffer set by the previous run in test-memcpy.c
    and test-memmove.c to catch the error when the following implementations
    do copy anything.

        PR string/19907
        * string/test-memcpy.c (do_one_test): Clear the destination
        buffer set by the previous run.
        * string/test-memmove.c (do_one_test): Likewise.

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d1a27f0f33a6c07c6842e8d1c7a67ad8758873a1

commit d1a27f0f33a6c07c6842e8d1c7a67ad8758873a1
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Mar 30 09:18:27 2016 -0700

    Add --enable-large-benchtests for large data benchmarks

    We like to run memcpy memmove and memset benchmarks with large data sizes.
    This patch adds --enable-large-benchtests to enable benchmarks with very
    large data.

        * benchtests/Makefile (string-benchset): Add memcpy-large,
        memmove-large and memset-large for --enable-large-benchtests.
        * benchtests/bench-memcpy-large.c: New file.
        * benchtests/bench-memmove-large.c: Likewise.
        * benchtests/bench-memmove-large.c: Likewise.
        * benchtests/bench-string.h (TIMEOUT): Don't redefine.
        * config.make.in (run-large-benchtests): New.
        * configure.ac: Add --enable-large-benchtests.
        * configure: Regenerated.

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