py: Make mp_setup_code_state take concrete pointer for func arg.

py/bc.c

@@ -89,10 +89,9 @@ STATIC void dump_args(const mp_obj_t *a, mp_uint_t sz) {
 //    - code_state->ip should contain the offset in bytes from the start of
 //      the bytecode chunk to just after n_state and n_exc_stack
 //    - code_state->n_state should be set to the state size (locals plus stack)
-void mp_setup_code_state(mp_code_state *code_state, mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
+void mp_setup_code_state(mp_code_state *code_state, mp_obj_fun_bc_t *self, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
     // This function is pretty complicated.  It's main aim is to be efficient in speed and RAM
     // usage for the common case of positional only args.
-    mp_obj_fun_bc_t *self = self_in;
     mp_uint_t n_state = code_state->n_state;
 
     // ip comes in as an offset into bytecode, so turn it into a true pointer

py/bc.h

@@ -91,7 +91,8 @@ mp_uint_t mp_decode_uint(const byte **ptr);
 
 mp_vm_return_kind_t mp_execute_bytecode(mp_code_state *code_state, volatile mp_obj_t inject_exc);
 mp_code_state *mp_obj_fun_bc_prepare_codestate(mp_obj_t func, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
-void mp_setup_code_state(mp_code_state *code_state, mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
+struct _mp_obj_fun_bc_t;
+void mp_setup_code_state(mp_code_state *code_state, struct _mp_obj_fun_bc_t *self, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
 void mp_bytecode_print(const void *descr, const byte *code, mp_uint_t len, const mp_uint_t *const_table);
 void mp_bytecode_print2(const byte *code, mp_uint_t len);
 const byte *mp_bytecode_print_str(const byte *ip);

py/objfun.c

@@ -231,7 +231,7 @@ STATIC mp_obj_t fun_bc_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw,
 
     code_state->ip = (byte*)(ip - self->bytecode); // offset to after n_state/n_exc_stack
     code_state->n_state = n_state;
-    mp_setup_code_state(code_state, self_in, n_args, n_kw, args);
+    mp_setup_code_state(code_state, self, n_args, n_kw, args);
 
     // execute the byte code with the correct globals context
     code_state->old_globals = mp_globals_get();