2018-01-31  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84132
	* tree-data-ref.c (analyze_miv_subscript): Properly
	check whether evolution_function_is_affine_multivariate_p
	before calling gcd_of_steps_may_divide_p.

	* g++.dg/torture/pr84132.C: New testcase.

From-SVN: r257232