re PR tree-optimization/70115 (gcc ICE at -O2 (seg fault) and above on valid code on x86_64-linux-gnu)

2016-03-07  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/70115
	* tree-ssa-loop-ivcanon.c (propagate_into_all_uses): Remove.
	(propagate_constants_for_unrolling): Use replace_uses_by.

	* gcc.dg/torture/pr70115.c: New testcase.

From-SVN: r234027