2017-12-08  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/81303
	* tree-vect-stmts.c (vect_is_simple_cond): For invariant
	conditions try to create a comparison vector type matching
	the data vector type.
	(vectorizable_condition): Adjust.
	* tree-vect-patterns.c (vect_recog_mask_conversion_pattern):
	Leave invariant conditions alone in case we can vectorize those.

	* gcc.target/i386/vectorize9.c: New testcase.
	* gcc.target/i386/vectorize10.c: New testcase.

From-SVN: r255497