diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 40b0dcbe346b..984447e40ca8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2008-11-07  Sebastian Pop  <sebastian.pop@amd.com>
+
+	PR middle-end/37379
+	* tree-scalar-evolution.c (instantiate_scev_1): Return
+	chrec_dont_know for VL_EXP_CLASS_P.
+	
 2008-11-06  Uros Bizjak  <ubizjak@gmail.com>
 
 	* reg-stack.c (reg_to_stack): Add missing braces in memset
diff --git a/gcc/tree-scalar-evolution.c b/gcc/tree-scalar-evolution.c
index 52e2c75f0fe2..51bbd4bcdcb1 100644
--- a/gcc/tree-scalar-evolution.c
+++ b/gcc/tree-scalar-evolution.c
@@ -2213,7 +2213,9 @@ instantiate_scev_1 (basic_block instantiate_below,
       break;
     }
 
-  gcc_assert (!VL_EXP_CLASS_P (chrec));
+  if (VL_EXP_CLASS_P (chrec))
+    return chrec_dont_know;
+
   switch (TREE_CODE_LENGTH (TREE_CODE (chrec)))
     {
     case 3: