Fix PR middle-end/49519.

gcc/

2011-07-08  Kirill Yukhin  <kirill.yukhin@intel.com>

	PR middle-end/49519
	* calls.c (mem_overlaps_already_clobbered_arg_p): Additional
	check if address is stored in register. If so - give up.
	(check_sibcall_argument_overlap_1): Do not perform check of
	overlapping when it is call to address.

gcc/tessuite/

2011-07-08  Kirill Yukhin  <kirill.yukhin@intel.com>

	PR middle-end/49519
	* g++.dg/torture/pr49519.C: New test.

From-SVN: r176042