diff --git a/gcc/cfgexpand.cc b/gcc/cfgexpand.cc
index f3a33ff9a07..ed890f692e5 100644
--- a/gcc/cfgexpand.cc
+++ b/gcc/cfgexpand.cc
@@ -703,6 +703,11 @@ add_scope_conflicts_1 (basic_block bb, bitmap work, bool for_conflict)
 static void
 add_scope_conflicts (void)
 {
+  /* If there is only one variable, there is nothing to be done as
+     there is only possible partition.  */
+  if (stack_vars_num == 1)
+    return;
+
   basic_block bb;
   bool changed;
   bitmap work = BITMAP_ALLOC (NULL);