--- gcc/tree-vect-loop.c	(revision 193844)
+++ gcc/tree-vect-loop.c	(revision 193845)
@@ -4624,7 +4624,6 @@ vectorizable_reduction (gimple stmt, gim
   if (orig_stmt)
     {
       orig_stmt_info = vinfo_for_stmt (orig_stmt);
-      gcc_assert (STMT_VINFO_RELATED_STMT (orig_stmt_info) == stmt);
       gcc_assert (STMT_VINFO_IN_PATTERN_P (orig_stmt_info));
       gcc_assert (!STMT_VINFO_IN_PATTERN_P (stmt_info));
     }
--- gcc/testsuite/gcc.dg/pr55110.c	(revision 0)
+++ gcc/testsuite/gcc.dg/pr55110.c	(revision 193845)
@@ -0,0 +1,13 @@
+/* PR tree-optimization/55110 */
+/* { dg-do compile } */
+/* { dg-options "-O1 -ftree-vectorize" } */
+
+int
+foo (int x)
+{
+  int a, b;
+  for (b = 0; b < 8; b++)
+    for (a = 0; a < 2; a++)
+      x /= 3;
+  return x;
+}