2018-02-08  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84233
	* tree-ssa-phiprop.c (propagate_with_phi): Use separate
	changed flag instead of boguously re-using phi_inserted.

	* g++.dg/torture/pr84233.C: New testcase.

From-SVN: r257486