re PR middle-end/26996 (interpret_rhs_modify_expr calls fold_convert (vector_type, -1))

	PR tree-optimization/26996
	* tree-scalar-evolution.c (analyze_scalar_evolution_1): Don't analyze
	VECTOR_TYPE variables.

From-SVN: r112700

gcc/ChangeLog

+2006-04-05  Sebastian Pop  <pop@cri.ensmp.fr>
+
+	PR tree-optimization/26996
+	* tree-scalar-evolution.c (analyze_scalar_evolution_1): Don't analyze
+	VECTOR_TYPE variables.
+
 2006-04-05  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/26763

gcc/tree-scalar-evolution.c

@@ -1727,7 +1727,7 @@ analyze_scalar_evolution_1 (struct loop *loop, tree var, tree res)
   basic_block bb;
   struct loop *def_loop;
 
-  if (loop == NULL)
+  if (loop == NULL || TREE_CODE (type) == VECTOR_TYPE)
     return chrec_dont_know;
 
   if (TREE_CODE (var) != SSA_NAME)