Hello!

Use __get_cpuid_count and introduce check_osxsave local function.

2017-09-04  Uros Bizjak  <ubizjak@gmail.com>

    * gcc.target/i386/adx-check.h (main): Use __get_cpuid_count.
    * gcc.target/i386/bmi-check.h (main): Ditto.
    * gcc.target/i386/bmi2-check.h (main): Ditto.
    * gcc.target/i386/rtm-check.h (main): Ditto.
    * gcc.target/i386/sha-check.h (main): Ditto.
    * gcc.target/i386/avx2-check.h (check_osxsave): New function.
    (main): Use __get_cpuid_count.  Use check_osxsave.
    * gcc.target/i386/avx512-check.h (check_osxsave): New function.
    (main): Use __get_cpuid_count.  Use check_osxsave.  Reorder conditions.
    * gcc.target/i386/mpx/mpx-check.h (check_osxsave): New function.
    (main): Use check_osxsave.

Tested on x86_64-linux-gnu, committed to mainline SVN.

Uros.