poly_int: get_inner_reference_aff

This patch makes get_inner_reference_aff return the size as a
poly_widest_int rather than a widest_int.

2017-12-20  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* tree-affine.h (get_inner_reference_aff): Return the size as a
	poly_widest_int.
	* tree-affine.c (get_inner_reference_aff): Likewise.
	* tree-data-ref.c (dr_may_alias_p): Update accordingly.
	* tree-ssa-loop-im.c (mem_refs_may_alias_p): Likewise.

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

From-SVN: r255891

gcc/ChangeLog

@@ -2,6 +2,16 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* tree-affine.h (get_inner_reference_aff): Return the size as a
+	poly_widest_int.
+	* tree-affine.c (get_inner_reference_aff): Likewise.
+	* tree-data-ref.c (dr_may_alias_p): Update accordingly.
+	* tree-ssa-loop-im.c (mem_refs_may_alias_p): Likewise.
+
+2017-12-20  Richard Sandiford  <richard.sandiford@linaro.org>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* fold-const.c (pointer_may_wrap_p): Take the offset as a
 	HOST_WIDE_INT rather than a poly_int64.
 

gcc/tree-affine.c

@@ -927,7 +927,7 @@ debug_aff (aff_tree *val)
    which REF refers.  */
 
 tree
-get_inner_reference_aff (tree ref, aff_tree *addr, widest_int *size)
+get_inner_reference_aff (tree ref, aff_tree *addr, poly_widest_int *size)
 {
   HOST_WIDE_INT bitsize, bitpos;
   tree toff;

gcc/tree-affine.h

@@ -80,7 +80,7 @@ bool aff_combination_constant_multiple_p (aff_tree *, aff_tree *,
 void aff_combination_expand (aff_tree *, hash_map<tree, name_expansion *> **);
 void tree_to_aff_combination_expand (tree, tree, aff_tree *,
 				     hash_map<tree, name_expansion *> **);
-tree get_inner_reference_aff (tree, aff_tree *, widest_int *);
+tree get_inner_reference_aff (tree, aff_tree *, poly_widest_int *);
 void free_affine_expand_cache (hash_map<tree, name_expansion *> **);
 bool aff_comb_cannot_overlap_p (aff_tree *, const poly_widest_int &,
 				const poly_widest_int &);

gcc/tree-data-ref.c

@@ -2134,7 +2134,7 @@ dr_may_alias_p (const struct data_reference *a, const struct data_reference *b,
   if (!loop_nest)
     {
       aff_tree off1, off2;
-      widest_int size1, size2;
+      poly_widest_int size1, size2;
       get_inner_reference_aff (DR_REF (a), &off1, &size1);
       get_inner_reference_aff (DR_REF (b), &off2, &size2);
       aff_combination_scale (&off1, -1);

gcc/tree-ssa-loop-im.c

@@ -1581,7 +1581,7 @@ mem_refs_may_alias_p (im_mem_ref *mem1, im_mem_ref *mem2,
   /* Perform BASE + OFFSET analysis -- if MEM1 and MEM2 are based on the same
      object and their offset differ in such a way that the locations cannot
      overlap, then they cannot alias.  */
-  widest_int size1, size2;
+  poly_widest_int size1, size2;
   aff_tree off1, off2;
 
   /* Perform basic offset and type-based disambiguation.  */