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

gcc/ChangeLog

@@ -2,6 +2,14 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* 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.
+
+2017-12-21  Richard Sandiford  <richard.sandiford@linaro.org>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* varasm.c (addr_const::offset): Change from HOST_WIDE_INT
 	to poly_int64.
 	(decode_addr_const): Update accordingly.

gcc/tree-ssanames.c

@@ -643,13 +643,16 @@ set_ptr_info_alignment (struct ptr_info_def *pi, unsigned int align,
    misalignment by INCREMENT modulo its current alignment.  */
 
 void
-adjust_ptr_info_misalignment (struct ptr_info_def *pi,
-			      unsigned int increment)
+adjust_ptr_info_misalignment (struct ptr_info_def *pi, poly_uint64 increment)
 {
   if (pi->align != 0)
     {
-      pi->misalign += increment;
-      pi->misalign &= (pi->align - 1);
+      increment += pi->misalign;
+      if (!known_misalignment (increment, pi->align, &pi->misalign))
+	{
+	  pi->align = known_alignment (increment);
+	  pi->misalign = 0;
+	}
     }
 }
 

gcc/tree-ssanames.h

@@ -89,8 +89,7 @@ extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
 extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *);
 extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int,
 				    unsigned int);
-extern void adjust_ptr_info_misalignment (struct ptr_info_def *,
-					  unsigned int);
+extern void adjust_ptr_info_misalignment (struct ptr_info_def *, poly_uint64);
 extern struct ptr_info_def *get_ptr_info (tree);
 extern void set_ptr_nonnull (tree);
 extern bool get_ptr_nonnull (const_tree);