diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
index 234ee16fe4a..221a67fe57b 100644
--- a/gcc/c/c-decl.c
+++ b/gcc/c/c-decl.c
@@ -9379,7 +9379,7 @@ build_enumerator (location_t decl_loc, location_t loc,
 
 tree
 c_simulate_enum_decl (location_t loc, const char *name,
-		      vec<string_int_pair> values)
+		      vec<string_int_pair> *values_ptr)
 {
   location_t saved_loc = input_location;
   input_location = loc;
@@ -9389,6 +9389,7 @@ c_simulate_enum_decl (location_t loc, const char *name,
 
   tree value_chain = NULL_TREE;
   string_int_pair *value;
+  vec<string_int_pair> values = *values_ptr;
   unsigned int i;
   FOR_EACH_VEC_ELT (values, i, value)
     {
diff --git a/gcc/c/c-tree.h b/gcc/c/c-tree.h
index ab6db3860f5..a8a90eae30d 100644
--- a/gcc/c/c-tree.h
+++ b/gcc/c/c-tree.h
@@ -595,7 +595,7 @@ extern void finish_function (location_t = input_location);
 extern tree finish_struct (location_t, tree, tree, tree,
 			   class c_struct_parse_info *);
 extern tree c_simulate_enum_decl (location_t, const char *,
-				  vec<string_int_pair>);
+				  vec<string_int_pair> *);
 extern struct c_arg_info *build_arg_info (void);
 extern struct c_arg_info *get_parm_info (bool, tree);
 extern tree grokfield (location_t, struct c_declarator *,
diff --git a/gcc/config/aarch64/aarch64-sve-builtins.cc b/gcc/config/aarch64/aarch64-sve-builtins.cc
index f44f81f1375..f71b287570e 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins.cc
@@ -3499,7 +3499,7 @@ register_svpattern ()
 #undef PUSH
 
   acle_svpattern = lang_hooks.types.simulate_enum_decl (input_location,
-							"svpattern", values);
+							"svpattern", &values);
 }
 
 /* Register the svprfop enum.  */
@@ -3513,7 +3513,7 @@ register_svprfop ()
 #undef PUSH
 
   acle_svprfop = lang_hooks.types.simulate_enum_decl (input_location,
-						      "svprfop", values);
+						      "svprfop", &values);
 }
 
 /* Implement #pragma GCC aarch64 "arm_sve.h".  */
diff --git a/gcc/cp/cp-objcp-common.h b/gcc/cp/cp-objcp-common.h
index 53c6e4c2c88..f1704aad557 100644
--- a/gcc/cp/cp-objcp-common.h
+++ b/gcc/cp/cp-objcp-common.h
@@ -38,7 +38,7 @@ extern bool cp_handle_option (size_t, const char *, HOST_WIDE_INT, int,
 			      location_t, const struct cl_option_handlers *);
 extern tree cxx_make_type_hook			(tree_code);
 extern tree cxx_simulate_enum_decl (location_t, const char *,
-				    vec<string_int_pair>);
+				    vec<string_int_pair> *);
 
 /* Lang hooks that are shared between C++ and ObjC++ are defined here.  Hooks
    specific to C++ or ObjC++ go in cp/cp-lang.c and objcp/objcp-lang.c,
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 6fa6b9adc87..f626f1e65ee 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -16408,7 +16408,7 @@ lookup_enumerator (tree enumtype, tree name)
 
 tree
 cxx_simulate_enum_decl (location_t loc, const char *name,
-			vec<string_int_pair> values)
+			vec<string_int_pair> *values)
 {
   location_t saved_loc = input_location;
   input_location = loc;
diff --git a/gcc/langhooks-def.h b/gcc/langhooks-def.h
index 8b744d96fb2..02b4681dd96 100644
--- a/gcc/langhooks-def.h
+++ b/gcc/langhooks-def.h
@@ -55,7 +55,7 @@ extern void lhd_set_decl_assembler_name (tree decl);
 extern void lhd_overwrite_decl_assembler_name (tree decl, tree name);
 extern bool lhd_warn_unused_global_decl (const_tree);
 extern tree lhd_simulate_enum_decl (location_t, const char *,
-				    vec<string_int_pair>);
+				    vec<string_int_pair> *);
 extern tree lhd_type_for_size (unsigned precision, int unsignedp);
 extern void lhd_incomplete_type_error (location_t, const_tree, const_tree);
 extern tree lhd_type_promotes_to (tree);
diff --git a/gcc/langhooks.c b/gcc/langhooks.c
index d753199ffe0..48c72377778 100644
--- a/gcc/langhooks.c
+++ b/gcc/langhooks.c
@@ -485,7 +485,7 @@ lhd_make_node (enum tree_code code)
    might be reusable elsewhere.  */
 tree
 lhd_simulate_enum_decl (location_t loc, const char *name,
-			vec<string_int_pair> values)
+			vec<string_int_pair> *values_ptr)
 {
   tree enumtype = lang_hooks.types.make_type (ENUMERAL_TYPE);
   tree enumdecl = build_decl (loc, TYPE_DECL, get_identifier (name), enumtype);
@@ -493,6 +493,7 @@ lhd_simulate_enum_decl (location_t loc, const char *name,
 
   tree value_chain = NULL_TREE;
   string_int_pair *value;
+  vec<string_int_pair> values = *values_ptr;
   unsigned int i;
   FOR_EACH_VEC_ELT (values, i, value)
     {
diff --git a/gcc/langhooks.h b/gcc/langhooks.h
index 1b417a01a4e..ffd3e0bf2db 100644
--- a/gcc/langhooks.h
+++ b/gcc/langhooks.h
@@ -66,7 +66,7 @@ struct lang_hooks_for_types
 
   /* Make an enum type with the given name and values, associating
      them all with the given source location.  */
-  tree (*simulate_enum_decl) (location_t, const char *, vec<string_int_pair>);
+  tree (*simulate_enum_decl) (location_t, const char *, vec<string_int_pair> *);
 
   /* Return what kind of RECORD_TYPE this is, mainly for purposes of
      debug information.  If not defined, record types are assumed to