Index: lib/CodeGen/IslExprBuilder.cpp
===================================================================
--- lib/CodeGen/IslExprBuilder.cpp
+++ lib/CodeGen/IslExprBuilder.cpp
@@ -83,7 +83,7 @@
     isl::val Val = Expr.get_val();
     APInt APValue = APIntFromVal(Val);
     auto BitWidth = APValue.getBitWidth();
-    return BitWidth >= 64;
+    return BitWidth > 64;
   }
 
   assert(Type == isl_ast_expr_op && "Expected isl_ast_expr of type operation");