rs6000-string.c (expand_cmp_vec_sequence): Rename and modify expand_strncmp_vec_sequence.

rs6000-string.c (expand_cmp_vec_sequence): Rename and modify expand_strncmp_vec_sequence.

2018-11-26  Aaron Sawdey  <acsawdey@linux.ibm.com>

	* config/rs6000/rs6000-string.c (expand_cmp_vec_sequence): Rename
	and modify expand_strncmp_vec_sequence.
	(emit_final_compare_vec): Rename and modify emit_final_str_compare_vec.
	(generate_6432_conversion): New function.
	(expand_block_compare): Add support for vsx.
	(expand_block_compare_gpr): New function.
	* config/rs6000/rs6000.opt (rs6000_block_compare_inline_limit): Increase
	default limit to 63 because of more compact vsx code.

From-SVN: r266481