rs6000-c.c: Add built-in support for vector compare equal and vector compare not...

rs6000-c.c: Add built-in support for vector compare equal and vector compare not equal.

gcc/ChangeLog:

2016-11-21  Carl Love  <cel@us.ibm.com>

        * config/rs6000/rs6000-c.c: Add built-in support for vector compare
        equal and vector compare not equal.  The vector compares take two
        arguments of type vector bool char, vector bool short, vector bool int,
        vector bool long long with the same return type.
        * doc/extend.texi: Update built-in documentation file for the new
        powerpc built-ins.

gcc/testsuite/ChangeLog:

2016-11-21  Carl Love  <cel@us.ibm.com>

        * gcc.target/powerpc/builtins-3.c: New file to test the new
        built-ins for vector compare equal and vector compare not equal.

From-SVN: r242706