PR rtl-optimization/52773
	* calls.c (emit_library_call_value): When pushing arguments use
	stack_pointer_rtx rather than virtual_outgoing_args_rtx in
	CALL_INSN_FUNCTION_USAGE.  Only emit one of use of the magic
	stack pointer reference into CALL_INSN_FUNCTION_USAGE.

	PR rtl-optimization/52773
	* gcc.c-torture/compile/pr52773.c: New test.

From-SVN: r219796