backport: rs6000.c (rs6000_gen_le_vsx_permute): Use rotate instead of vec_select...

backport: rs6000.c (rs6000_gen_le_vsx_permute): Use rotate instead of vec_select for V1TImode.

2017-10-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	Backport from mainline
	2017-03-09  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_gen_le_vsx_permute): Use rotate
	instead of vec_select for V1TImode.
	* conifg/rs6000/vsx.md (VSX_LE): Remove mode iterator that is no
	longer needed.
	(VSX_LE_128): Add V1TI to this mode iterator.
	(*vsx_le_perm_load_<mode>): Change to use VSX_D mode iterator.
	(*vsx_le_perm_store_<mode>): Likewise.
	(pre-reload splitter for VSX stores): Likewise.
	(post-reload splitter for VSX stores): Likewise.
	(*vsx_xxpermdi2_le_<mode>): Likewise.
	(*vsx_lxvd2x2_le_<mode>): Likewise.
	(*vsx_stxvd2x2_le_<mode>): Likewise.

From-SVN: r253961