2015-07-22  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66952
	* tree-ssa-ifcombine.c (pass_tree_ifcombine::execute): For
	blocks we end up executing unconditionally reset all SSA
	info such as range and alignment.
	* tree-ssanames.h (reset_flow_sensitive_info): Declare.
	* tree-ssanames.c (reset_flow_sensitive_info): New function.

	* gcc.dg/torture/pr66952.c: New testcase.

From-SVN: r226062