WIP

compile.c

@@ -3933,7 +3933,7 @@ iseq_specialized_instruction(rb_iseq_t *iseq, INSN *iobj)
             switch (vm_ci_mid(ci)) {
               case idNew:
                 iobj->insn_id = BIN(opt_new);
-                iobj->operands[1] = (VALUE)new_callinfo(iseq, idInitialize, vm_ci_argc(ci), vm_ci_flag(ci) | VM_CALL_FCALL, vm_ci_kwarg(ci), FALSE);
+                iobj->operands[1] = (VALUE)new_callinfo(iseq, idInitialize, vm_ci_argc(ci) - vm_ci_kwarg(ci)->keyword_len, vm_ci_flag(ci) | VM_CALL_FCALL, vm_ci_kwarg(ci), FALSE);
                 break;
               default:
                 iobj->insn_id = BIN(opt_send_without_block);

insns.def

@@ -838,22 +838,32 @@ opt_new
 // attr rb_snum_t sp_inc = sp_inc_of_sendish(cd->ci);
 // attr rb_snum_t comptime_sp_inc = sp_inc_of_sendish(ci);
 {
-    VALUE recv = TOPN(vm_ci_argc(cd->ci));
-
-    val = vm_opt_new_alloc(GET_ISEQ(), recv, cd);
-    if (val != Qundef) {
-        TOPN(vm_ci_argc(cd->ci)) = val;
-        fprintf(stderr, "opt!\n");
-        if (vm_sendish(ec, GET_CFP(), cd_initialize, VM_BLOCK_HANDLER_NONE, mexp_search_method) == Qundef) {
-            val = Qundef;
-        }
-    }
+    int argc = vm_ci_argc(cd->ci);
+    VM_ASSERT((int)vm_ci_argc(cd_initialize->ci) == argc);
 
-    if (val == Qundef) {
-        fprintf(stderr, "de-opt!\n");
+    VALUE recv = TOPN(argc);
+    val = Qundef;
+
+    VALUE new_obj = vm_opt_new_alloc(GET_ISEQ(), recv, cd);
+    if (new_obj != Qundef) {
+        TOPN(argc) = new_obj;
+
+        val = vm_sendish(ec, GET_CFP(), cd_initialize, VM_BLOCK_HANDLER_NONE, mexp_search_method);
+        // FIXME: somehow the `initialize` return is what end up being the `.new` return, instead of `new_obj`.
+        // I don't get why.
+
+        JIT_EXEC(ec, val);
 
-        VALUE bh = VM_BLOCK_HANDLER_NONE;
-        val = vm_sendish(ec, GET_CFP(), cd, bh, mexp_search_method);
+        if (val == Qundef) {
+            RESTORE_REGS();
+            NEXT_INSN();
+        }
+        else {
+            val = new_obj;
+        }
+    }
+    else if (val == Qundef) {
+        val = vm_sendish(ec, GET_CFP(), cd, VM_BLOCK_HANDLER_NONE, mexp_search_method);
         JIT_EXEC(ec, val);
 
         if (val == Qundef) {

internal/object.h

@@ -22,6 +22,8 @@ static inline void RBASIC_CLEAR_CLASS(VALUE obj);
 static inline void RBASIC_SET_CLASS_RAW(VALUE obj, VALUE klass);
 static inline void RBASIC_SET_CLASS(VALUE obj, VALUE klass);
 VALUE rb_class_alloc(VALUE klass);
+VALUE rb_obj_initialize(VALUE _self);
+
 
 RUBY_SYMBOL_EXPORT_BEGIN
 /* object.c (export) */

object.c

@@ -1222,7 +1222,11 @@ rb_class_search_ancestor(VALUE cl, VALUE c)
  *
  * Returns a new BasicObject.
  */
-#define rb_obj_initialize rb_obj_dummy0
+VALUE
+rb_obj_initialize(VALUE _self)
+{
+    return Qnil;
+}
 
 /*
  * Not documented