poly_int: adjust_ptr_info_misalignment

poly_int: adjust_ptr_info_misalignment

This patch makes adjust_ptr_info_misalignment take the adjustment
as a poly_uint64 rather than an unsigned int.

2017-12-21  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* tree-ssanames.h (adjust_ptr_info_misalignment): Take the increment
	as a poly_uint64 rather than an unsigned int.
	* tree-ssanames.c (adjust_ptr_info_misalignment): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r255928