diff --git a/vyper/builtins/_signatures.py b/vyper/builtins/_signatures.py
index 34af98f996..13f78f0c07 100644
--- a/vyper/builtins/_signatures.py
+++ b/vyper/builtins/_signatures.py
@@ -11,6 +11,69 @@
 from vyper.semantics.types.utils import type_from_annotation
 
 
+def process_arg(arg, expected_arg_type, context):
+    # If the input value is a typestring, return the equivalent codegen type for IR generation
+    if isinstance(expected_arg_type, TYPE_T):
+        return expected_arg_type.typedef
+
+    # if it is a word type, return a stack item.
+    # TODO: remove this case, builtins should not require value expressions
+    if expected_arg_type._is_prim_word:
+        return Expr.parse_value_expr(arg, context)
+
+    if isinstance(expected_arg_type, VyperType):
+        return Expr(arg, context).ir_node
+
+    raise CompilerPanic(f"Unexpected type: {expected_arg_type}")  # pragma: notest
+
+
+def process_kwarg(kwarg_node, kwarg_settings, expected_kwarg_type, context):
+    if kwarg_settings.require_literal:
+        return kwarg_node.value
+
+    return process_arg(kwarg_node, expected_kwarg_type, context)
+
+
+def process_inputs(wrapped_fn):
+    """
+    Generate IR for input arguments on builtin functions.
+
+    Applied as a wrapper on the `build_IR` method of
+    classes in `vyper.functions.functions`.
+    """
+
+    @functools.wraps(wrapped_fn)
+    def decorator_fn(self, node, context):
+        subs = []
+        for arg in node.args:
+            arg_ir = process_arg(arg, arg._metadata["type"], context)
+            # TODO annotate arg_ir with argname from self._inputs?
+            subs.append(arg_ir)
+
+        kwsubs = {}
+
+        # note: must compile in source code order, left-to-right
+        expected_kwarg_types = self.infer_kwarg_types(node)
+
+        for k in node.keywords:
+            kwarg_settings = self._kwargs[k.arg]
+            expected_kwarg_type = expected_kwarg_types[k.arg]
+            kwsubs[k.arg] = process_kwarg(k.value, kwarg_settings, expected_kwarg_type, context)
+
+        # add kwargs which were not specified in the source
+        for k, expected_arg in self._kwargs.items():
+            if k not in kwsubs:
+                kwsubs[k] = expected_arg.default
+
+        for k, v in kwsubs.items():
+            if isinstance(v, IRnode):
+                v.annotation = k
+
+        return wrapped_fn(self, node, subs, kwsubs, context)
+
+    return decorator_fn
+
+
 class BuiltinFunctionT(VyperType):
     _has_varargs = False
     _inputs: list[tuple[str, Any]] = []
@@ -79,66 +142,3 @@ def infer_kwarg_types(self, node: vy_ast.Call) -> dict[str, VyperType]:
 
     def __repr__(self):
         return f"(builtin) {self._id}"
-
-
-def process_arg(arg, expected_arg_type, context):
-    # If the input value is a typestring, return the equivalent codegen type for IR generation
-    if isinstance(expected_arg_type, TYPE_T):
-        return expected_arg_type.typedef
-
-    # if it is a word type, return a stack item.
-    # TODO: remove this case, builtins should not require value expressions
-    if expected_arg_type._is_prim_word:
-        return Expr.parse_value_expr(arg, context)
-
-    if isinstance(expected_arg_type, VyperType):
-        return Expr(arg, context).ir_node
-
-    raise CompilerPanic(f"Unexpected type: {expected_arg_type}")  # pragma: notest
-
-
-def process_kwarg(kwarg_node, kwarg_settings, expected_kwarg_type, context):
-    if kwarg_settings.require_literal:
-        return kwarg_node.value
-
-    return process_arg(kwarg_node, expected_kwarg_type, context)
-
-
-def process_inputs(wrapped_fn):
-    """
-    Generate IR for input arguments on builtin functions.
-
-    Applied as a wrapper on the `build_IR` method of
-    classes in `vyper.functions.functions`.
-    """
-
-    @functools.wraps(wrapped_fn)
-    def decorator_fn(self, node, context):
-        subs = []
-        for arg in node.args:
-            arg_ir = process_arg(arg, arg._metadata["type"], context)
-            # TODO annotate arg_ir with argname from self._inputs?
-            subs.append(arg_ir)
-
-        kwsubs = {}
-
-        # note: must compile in source code order, left-to-right
-        expected_kwarg_types = self.infer_kwarg_types(node)
-
-        for k in node.keywords:
-            kwarg_settings = self._kwargs[k.arg]
-            expected_kwarg_type = expected_kwarg_types[k.arg]
-            kwsubs[k.arg] = process_kwarg(k.value, kwarg_settings, expected_kwarg_type, context)
-
-        # add kwargs which were not specified in the source
-        for k, expected_arg in self._kwargs.items():
-            if k not in kwsubs:
-                kwsubs[k] = expected_arg.default
-
-        for k, v in kwsubs.items():
-            if isinstance(v, IRnode):
-                v.annotation = k
-
-        return wrapped_fn(self, node, subs, kwsubs, context)
-
-    return decorator_fn