This is a respin of a AArch64 patch that adds support for builtin arithmetic 
overflow operations. This update separates the patch into multiple pieces and 
addresses comments made by Richard Earnshaw here:

https://gcc.gnu.org/ml/gcc-patches/2017-07/msg00249.html

Original patch and motivation for patch here:

https://gcc.gnu.org/ml/gcc-patches/2017-05/msg01512.html

This patch contains new test cases to verify that the new overflow patterns are 
being utilized.

Bootstrapped and tested on aarch64-linux-gnu. Okay for trunk?

2017-10-26  Michael Collison  <michael.colli...@arm.com>
            Richard Henderson <r...@redhat.com>

        * gcc.target/aarch64/builtin_sadd_128.c: New testcase.
        * gcc.target/aarch64/builtin_saddl.c: New testcase.
        * gcc.target/aarch64/builtin_saddll.c: New testcase.
        * gcc.target/aarch64/builtin_uadd_128.c: New testcase.
        * gcc.target/aarch64/builtin_uaddl.c: New testcase.
        * gcc.target/aarch64/builtin_uaddll.c: New testcase.
        * gcc.target/aarch64/builtin_ssub_128.c: New testcase.
        * gcc.target/aarch64/builtin_ssubl.c: New testcase.
        * gcc.target/aarch64/builtin_ssubll.c: New testcase.
        * gcc.target/aarch64/builtin_usub_128.c: New testcase.
        * gcc.target/aarch64/builtin_usubl.c: New testcase.
        * gcc.target/aarch64/builtin_usubll.c: New testcase.

Attachment: gnutools-6308-tests-v1.patch.patch
Description: gnutools-6308-tests-v1.patch.patch

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