py: Add LOAD_NULL bytecode and use it to simplify function calls.

Adding this bytecode allows to remove 4 others related to
function/method calls with * and ** support.  Will also help with
bytecodes that make functions/closures with default positional and
keyword args.

1 files changed, 3 insertions, 1 deletions

diff --git a/py/runtime.c b/py/runtime.c
index 489886496..7e0287945 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -505,7 +505,7 @@ mp_obj_t mp_call_method_n_kw(uint n_args, uint n_kw, const mp_obj_t *args) {
     return mp_call_function_n_kw(args[0], n_args + adjust, n_kw, args + 2 - adjust);
 }
 
-mp_obj_t mp_call_method_n_kw_var(bool have_self, uint n_args_n_kw, const mp_obj_t *args, mp_obj_t pos_seq, mp_obj_t kw_dict) {
+mp_obj_t mp_call_method_n_kw_var(bool have_self, uint n_args_n_kw, const mp_obj_t *args) {
     mp_obj_t fun = *args++;
     mp_obj_t self = MP_OBJ_NULL;
     if (have_self) {
@@ -513,6 +513,8 @@ mp_obj_t mp_call_method_n_kw_var(bool have_self, uint n_args_n_kw, const mp_obj_
     }
     uint n_args = n_args_n_kw & 0xff;
     uint n_kw = (n_args_n_kw >> 8) & 0xff;
+    mp_obj_t pos_seq = args[n_args + 2 * n_kw]; // map be MP_OBJ_NULL
+    mp_obj_t kw_dict = args[n_args + 2 * n_kw + 1]; // map be MP_OBJ_NULL
 
     DEBUG_OP_printf("call method var (fun=%p, self=%p, n_args=%u, n_kw=%u, args=%p, seq=%p, dict=%p)\n", fun, self, n_args, n_kw, args, pos_seq, kw_dict);