2018-03-12  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84803
	* tree-if-conv.c (ifcvt_memrefs_wont_trap): Don't do anything
	for refs DR analysis didn't process.

	* gcc.dg/torture/pr84803.c: New testcase.

From-SVN: r258446