Merge in trunk.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/wide-int@205966 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 15 insertions, 2 deletions

diff --git a/gcc/tree-affine.h b/gcc/tree-affine.h
index 961b9a6e5d2..68f2908eb6e 100644
--- a/gcc/tree-affine.h
+++ b/gcc/tree-affine.h
@@ -35,7 +35,7 @@ struct aff_comb_elt
   widest_int coef;
 };
 
-typedef struct affine_tree_combination
+struct aff_tree
 {
   /* Type of the result of the combination.  */
   tree type;
@@ -58,7 +58,7 @@ typedef struct affine_tree_combination
      than MAX_AFF_ELTS elements.  Type of REST will be either sizetype for
      TYPE of POINTER_TYPEs or TYPE.  */
   tree rest;
-} aff_tree;
+};
 
 widest_int wide_int_ext_for_comb (const widest_int &, aff_tree *);
 void aff_combination_const (aff_tree *, tree, const widest_int &);
@@ -83,3 +83,16 @@ bool aff_comb_cannot_overlap_p (aff_tree *, const widest_int &,
 
 /* Debugging functions.  */
 void debug_aff (aff_tree *);
+
+/* Return true if AFF is actually ZERO.  */
+static inline bool
+aff_combination_zero_p (aff_tree *aff)
+{
+  if (!aff)
+    return true;
+
+  if (aff->n == 0 && aff->offset.is_zero ())
+    return true;
+
+  return false;
+}