This is a followup patch which addresses formatting comments posted here:

https://gcc.gnu.org/ml/gcc-patches/2015-11/msg02611.html

2015-11-24  Michael Collison <Michael.Collison@linaro.org>
     * config/aarch64/aarch64-simd.md (widen_ssum, widen_usum)
(aarch64_<ANY_EXTEND:su><ADDSUB:optab>w<mode>_internal): New patterns
     * config/aarch64/iterators.md (Vhalf, VDBLW): New mode attributes.
     * gcc.target/aarch64/saddw-1.c: New test.
     * gcc.target/aarch64/saddw-2.c: New test.
     * gcc.target/aarch64/uaddw-1.c: New test.
     * gcc.target/aarch64/uaddw-2.c: New test.
     * gcc.target/aarch64/uaddw-3.c: New test.
     * lib/target-support.exp
     (check_effective_target_vect_widen_sum_hi_to_si_pattern):
     Add aarch64 to list of support targets.

Okay to commit?

-- 
Michael Collison
Linaro Toolchain Working Group
michael.collison@linaro.org