2018-08-17  Richard Biener  <rguenther@suse.de>

	PR middle-end/86505
	* tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
	across a va-arg-pack using call adjust its return value accordingly.

	* gcc.dg/torture/pr86505.c: New testcase.

From-SVN: r263613