Backport PRs 56273, 59124, 64199, 64277, 64365, 64493, 64495

Backport PRs 56273, 59124, 64199, 64277, 64365, 64493, 64495

2015-02-19  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	2014-12-09  Richard Biener  <rguenther@suse.de>

	PR middle-end/64199
	* fold-const.c (fold_binary_loc): Use TREE_OVERFLOW_P.

	* gcc.dg/torture/pr64199.c: New testcase.

	2015-01-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/64493
	PR tree-optimization/64495
	* tree-vect-loop.c (vect_finalize_reduction): For double-reductions
	assign the proper vectorized PHI to the inner loop exit PHIs.

	* gcc.dg/vect/pr64493.c: New testcase.
	* gcc.dg/vect/pr64495.c: Likewise.

	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.

	2015-02-19  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	2015-01-15  Richard Biener  <rguenther@suse.de>

	PR middle-end/64365
	* tree-data-ref.c (dr_analyze_indices): Make sure that accesses
	for MEM_REF access functions with the same base can never partially
	overlap.

	* gcc.dg/torture/pr64365.c: New testcase.

From-SVN: r220815