2015-10-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/67915
	* match.pd: Handle comparisons of addresses of STRING_CSTs.
	* gimplify.c (gimplify_cond_expr): Fold the GIMPLE conds we build.
	* tree-cfgcleanup.c (cleanup_control_expr_graph): Remove GENERIC
	stmt folding in favor of GIMPLE one.

	* gcc.dg/torture/pr67915.c: New testcase.

From-SVN: r228810