re PR middle-end/59125 (gcc triggers wrong strncpy_chk)

re PR middle-end/59125 (gcc triggers wrong strncpy_chk)

2013-11-18  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/59125
	PR tree-optimization/54570
	* tree-ssa-sccvn.c (copy_reference_ops_from_ref): When inlining
	is not complete do not treat component-references with offset zero
	but different fields as equal.
	* tree-object-size.c: Include tree-phinodes.h and ssa-iterators.h.
	(compute_object_sizes): Apply TLC.  Propagate the constant
	results into all uses and fold their stmts.
	* passes.def (pass_all_optimizations): Move pass_object_sizes
	after the first pass_forwprop and before pass_fre.

	* gcc.dg/builtin-object-size-8.c: Un-xfail.
	* gcc.dg/builtin-object-size-14.c: New testcase.
	* gcc.dg/strlenopt-14gf.c: Adjust.
	* gcc.dg/strlenopt-1f.c: Likewise.
	* gcc.dg/strlenopt-4gf.c: Likewise.

From-SVN: r204966