re PR tree-optimization/71881 (ICE on valid code at -O3 with -g enabled on x86_64-linux-gnu: cannot update SSA form)

2016-07-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/71881
	* tree-loop-distribution.c (destroy_loop): Remove blocks in
	reverse DOM order to make debug temp generation happy.

	* gcc.dg/torture/pr71881.c: New testcase.

From-SVN: r238374