diff --git a/gcc/ipa-fnsummary.cc b/gcc/ipa-fnsummary.cc
index 33f19365ec3..4c062fe8a0e 100644
--- a/gcc/ipa-fnsummary.cc
+++ b/gcc/ipa-fnsummary.cc
@@ -255,6 +255,9 @@ redirect_to_unreachable (struct cgraph_edge *e)
   struct cgraph_node *target
     = cgraph_node::get_create (builtin_decl_unreachable ());
 
+  gcc_checking_assert (lookup_attribute ("cold",
+					 DECL_ATTRIBUTES (target->decl)));
+
   if (e->speculative)
     e = cgraph_edge::resolve_speculation (e, target->decl);
   else if (!e->callee)
diff --git a/gcc/lto/lto-lang.cc b/gcc/lto/lto-lang.cc
index 652d7fc5e30..e41b548b398 100644
--- a/gcc/lto/lto-lang.cc
+++ b/gcc/lto/lto-lang.cc
@@ -60,6 +60,7 @@ static tree ignore_attribute (tree *, tree, tree, int, bool *);
 static tree handle_format_attribute (tree *, tree, tree, int, bool *);
 static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *);
 static tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
+static tree handle_cold_attribute (tree *, tree, tree, int, bool *);
 
 /* Helper to define attribute exclusions.  */
 #define ATTR_EXCL(name, function, type, variable)	\
@@ -128,6 +129,8 @@ static const attribute_spec lto_gnu_attributes[] =
 			      handle_sentinel_attribute, NULL },
   { "type generic",           0, 0, false, true, true, false,
 			      handle_type_generic_attribute, NULL },
+  { "cold",		      0, 0, false,  false, false, false,
+			      handle_cold_attribute, NULL },
   { "fn spec",	 	      1, 1, false, true, true, false,
 			      handle_fnspec_attribute, NULL },
   { "transaction_pure",	      0, 0, false, true, true, false,
@@ -598,6 +601,16 @@ handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name),
   return NULL_TREE;
 }
 
+/* Handle a "cold" attribute; arguments as in
+   struct attribute_spec.handler.  */
+
+static tree
+handle_cold_attribute (tree *, tree, tree, int, bool *)
+{
+  /* Nothing to be done here.  */
+  return NULL_TREE;
+}
+
 /* Cribbed from c-common.cc.  */
 
 static void