re PR target/80123 (libgomp tests pr66199-2.c and pr66199-5.c fail with -mcpu=power9)

re PR target/80123 (libgomp tests pr66199-2.c and pr66199-5.c fail with -mcpu=power9)

2017-03-21  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

	PR target/80123
	* doc/md.texi (Constraints): Document wA constraint.
	* config/rs6000/constraints.md (wA): New.
	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Add wA reg_class.
	(rs6000_init_hard_regno_mode_ok): Init wA constraint.
	* config/rs6000/rs6000.h (RS6000_CONSTRAINT_wA): New.
	* config/rs6000/vsx.md (vsx_splat_<mode>): Use wA constraint.

From-SVN: r246394