* optc-gen.awk (END): Make sure no variable is defined more

[pf3gnuchains/gcc-fork.git] / gcc / tree-data-ref.c

diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c
index 145312f..b984c04 100644 (file)
--- a/gcc/tree-data-ref.c
+++ b/gcc/tree-data-ref.c
@@ -109,9 +109,9 @@ array_base_name_differ_p (struct data_reference *a,
 {
   tree base_a = DR_BASE_NAME (a);
   tree base_b = DR_BASE_NAME (b);
-  tree ta = TREE_TYPE (base_a);
-  tree tb = TREE_TYPE (base_b);
 
+  if (!base_a || !base_b)
+    return false;
 
   /* Determine if same base.  Example: for the array accesses
      a[i], b[i] or pointer accesses *a, *b, bases are a, b.  */
@@ -179,24 +179,6 @@ array_base_name_differ_p (struct data_reference *a,
       return true;
     }
 
-  if (!alias_sets_conflict_p (get_alias_set (base_a), get_alias_set (base_b)))
-    {
-      *differ_p = true;
-      return true;
-    }
-
-  /* An instruction writing through a restricted pointer is
-     "independent" of any instruction reading or writing through a
-     different pointer, in the same block/scope.  */
-  if ((TREE_CODE (ta) == POINTER_TYPE && TYPE_RESTRICT (ta)
-       && !DR_IS_READ(a))
-      || (TREE_CODE (tb) == POINTER_TYPE && TYPE_RESTRICT (tb)
-         && !DR_IS_READ(b)))
-    {
-      *differ_p = true;
-      return true;
-    }
-
   return false;
 }
 
@@ -664,7 +646,7 @@ all_chrecs_equal_p (tree chrec)
 /* Determine for each subscript in the data dependence relation DDR
    the distance.  */
 
-static void
+void
 compute_subscript_distance (struct data_dependence_relation *ddr)
 {
   if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)
@@ -1111,7 +1093,7 @@ compute_overlap_steps_for_affine_univar (int niter, int step_a, int step_b,
    | y (t, u, v) = {{0, +, 1336}_u, +, 1}_v
    | z (t, u, v) = {{{0, +, 1}_t, +, 1335}_u, +, 1}_v
 
-   FORNOW: This is a specialized implementation for a case occuring in
+   FORNOW: This is a specialized implementation for a case occurring in
    a common benchmark.  Implement the general algorithm.  */
 
 static void
@@ -1787,7 +1769,7 @@ subscript_dependence_tester (struct data_dependence_relation *ddr)
    starting at FIRST_LOOP_DEPTH. 
    Return TRUE otherwise.  */
 
-static bool
+bool
 build_classic_dist_vector (struct data_dependence_relation *ddr, 
                           int nb_loops, int first_loop_depth)
 {