2015-01-27  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/56273
	PR tree-optimization/59124
	PR tree-optimization/64277
	* tree-vrp.c (vrp_finalize): Emit array-bound warnings only
	from the first VRP pass.

	* g++.dg/warn/Warray-bounds-6.C: New testcase.
	* gcc.dg/Warray-bounds-12.c: Likewise.
	* gcc.dg/Warray-bounds-13.c: Likewise.

From-SVN: r220157