2013-01-07  Richard Biener  <rguenther@suse.de>

	PR middle-end/55890
	* gimple.h (gimple_call_builtin_p): New overload.
	* gimple.c (validate_call): New function.
	(gimple_call_builtin_p): Likewise.
	* tree-ssa-structalias.c (find_func_aliases_for_builtin_call):
	Use gimple_call_builtin_p.
	(find_func_clobbers): Likewise.
	* tree-ssa-strlen.c (adjust_last_stmt): Likewise.
	(strlen_optimize_stmt): Likewise.

	* gcc.dg/torture/pr55890-1.c: New testcase.
	* gcc.dg/torture/pr55890-2.c: Likewise.

From-SVN: r194975