2019-11-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91003
	* tree-vect-slp.c (vect_mask_constant_operand_p): Pass in the
	operand number, avoid handling the non-condition operands of
	COND_EXPRs as comparisons.
	(vect_get_constant_vectors): Pass down the operand number.
	(vect_get_slp_defs): Likewise.

	* gfortran.dg/pr91003.f90: New testcase.

From-SVN: r278860