re PR tree-optimization/79186 (ICE on valid code at -O2 and -O3 on x86_64-linux-gnu:  Segmentation fault (in VRP))

2017-01-23  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79186
	* tree-vrp.c (register_new_assert_for): Make sure we've seen
	both incoming edges before moving an assert.

	* gcc.dg/torture/pr79186.c: New testcase.
	* gcc.dg/torture/pr79187.c: Likewise.

From-SVN: r244804