vm.c: `OP_DEF` to push a symbol to `a` register.

The code generator no longer need to emit `OP_LOADSYM` after `OP_DEF`.
`doc/opcode.md` is also updated.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/vm.c b/src/vm.c
index 3a7d2ac8f..cd70faf11 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -2823,6 +2823,7 @@ RETRY_TRY_BLOCK:
       mrb_define_method_raw(mrb, target, mid, m);
       mrb_method_added(mrb, target, mid);
       mrb_gc_arena_restore(mrb, ai);
+      regs[a] = mrb_symbol_value(mid);
       NEXT;
     }