p9-options-1.c: New test.

p9-options-1.c: New test.

gcc/testsuite/ChangeLog:

2017-03-23  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	* gcc.target/powerpc/p9-options-1.c: New test.

gcc/ChangeLog:

2017-03-23  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	* config/rs6000/rs6000.c (rs6000_option_override_internal): Change
	handling of certain combinations of target options, including the
	combinations -mpower8-vector vs. -mno-vsx, -mpower9-vector vs.
	-mno-power8-vector, and -mpower9_dform vs. -mno-power9-vector.

From-SVN: r246428