* tree-object-size.c (addr_object_size): Add OSI argument.
	Handle also INDIRECT_REF with SSA_NAME inside of it as base address.
	(compute_builtin_object_size, expr_object_size): Adjust callers.
	(plus_stmt_object_size): Call addr_object_size instead of
	compute_builtin_object_size.

	* gcc.dg/builtin-object-size-2.c (test1): Adjust expected results.
	* gcc.dg/builtin-object-size-4.c (test1): Adjust expected results.
	* gcc.dg/builtin-object-size-6.c: New test.

From-SVN: r148279