diff --git a/gcc/ipa-icf.cc b/gcc/ipa-icf.cc
index 5d5a42f9c6c..dff7ad6efda 100644
--- a/gcc/ipa-icf.cc
+++ b/gcc/ipa-icf.cc
@@ -284,6 +284,7 @@ sem_function::get_hash (void)
       hstate.add_int (177454); /* Random number for function type.  */
 
       hstate.add_int (arg_count);
+      hstate.add_int (static_chain_present);
       hstate.add_int (cfg_checksum);
       hstate.add_int (gcode_hash);
 
@@ -655,7 +656,10 @@ sem_function::equals_wpa (sem_item *item,
     }
 
   if (list1 || list2)
-    return return_false_with_msg ("Mismatched number of parameters");
+    return return_false_with_msg ("mismatched number of parameters");
+
+  if (static_chain_present != m_compared_func->static_chain_present)
+    return return_false_with_msg ("static chain mismatch");
 
   if (node->num_references () != item->node->num_references ())
     return return_false_with_msg ("different number of references");
@@ -876,7 +880,10 @@ sem_function::equals_private (sem_item *item)
         return return_false ();
     }
   if (arg1 || arg2)
-    return return_false_with_msg ("Mismatched number of arguments");
+    return return_false_with_msg ("mismatched number of arguments");
+
+  if (static_chain_present != m_compared_func->static_chain_present)
+    return return_false_with_msg ("static chain mismatch");
 
   if (!dyn_cast <cgraph_node *> (node)->has_gimple_body_p ())
     return true;
@@ -1368,6 +1375,8 @@ sem_function::init (ipa_icf_gimple::func_checker *checker)
   /* iterating all function arguments.  */
   arg_count = count_formal_params (fndecl);
 
+  static_chain_present = func->static_chain_decl != NULL_TREE;
+
   edge_count = n_edges_for_fn (func);
   cgraph_node *cnode = dyn_cast <cgraph_node *> (node);
   if (!cnode->thunk)
diff --git a/gcc/ipa-icf.h b/gcc/ipa-icf.h
index ef7e41bfa88..bd9fd9fb294 100644
--- a/gcc/ipa-icf.h
+++ b/gcc/ipa-icf.h
@@ -355,6 +355,9 @@ public:
      parameters.  */
   bool compatible_parm_types_p (tree, tree);
 
+  /* Return true if parameter I may be used.  */
+  bool param_used_p (unsigned int i);
+
   /* Exception handling region tree.  */
   eh_region region_tree;
 
@@ -379,6 +382,9 @@ public:
   /* Total number of SSA names used in the function.  */
   unsigned ssa_names_size;
 
+  /* Whether the special PARM_DECL for the static chain is present.  */
+  bool static_chain_present;
+
   /* Array of structures for all basic blocks.  */
   vec <ipa_icf_gimple::sem_bb *> bb_sorted;
 
@@ -386,9 +392,6 @@ public:
      function.  */
   hashval_t m_alias_sets_hash;
 
-  /* Return true if parameter I may be used.  */
-  bool param_used_p (unsigned int i);
-
 private:
   /* Calculates hash value based on a BASIC_BLOCK.  */
   hashval_t get_bb_hash (const ipa_icf_gimple::sem_bb *basic_block);