re PR tree-optimization/64357 (ICE at -Os on x86_64-linux-gnu in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:579)

2015-01-12  Richard Biener  <rguenther@suse.de>

	PR middle-end/64357
	* tree-cfg.c (gimple_can_merge_blocks_p): Protect simple
	latches properly.

	* gcc.dg/torture/pr64357.c: New testcase.

From-SVN: r219473