re PR target/80718 (GCC generates slow code for offsettable vec_duplicate)

re PR target/80718 (GCC generates slow code for offsettable vec_duplicate)

[gcc]
2017-05-22  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/80718
	* config/rs6000/vsx.md (vsx_splat_<mode>, VSX_D iterator): Split
	V2DF/V2DI splat into two separate patterns, one that handles
	registers, and the other that only handles memory.  Drop support
	for splatting from a GPR on ISA 2.07 and then splitting the
	splat into direct move and splat.
	(vsx_splat_<mode>_reg): Likewise.
	(vsx_splat_<mode>_mem): Likewise.

[gcc/testsuite]
2017-05-22  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/80718
	* gcc.target/powerpc/pr80718.c: New test.

From-SVN: r248352