https://git.ruby-lang.org/ruby.git/commit/?id=b7ae08992f

From b7ae08992f7e4c663b61a3895d29d066fa22e452 Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@h...>
Date: Fri, 10 Dec 2021 17:08:05 -0800
Subject: YJIT: Avoid unnecessary BOP invalidation

Previously we would invalidate BOPs in YJIT when the method registered
as a BOP was redefined on a subclass.
---
 vm.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/vm.c b/vm.c
index 44b87c3d543..c5934d52a56 100644
--- a/vm.c
+++ b/vm.c
@@ -1885,9 +1885,11 @@ rb_vm_check_redefinition_opt_method(const rb_method_entry_t *me, VALUE klass) https://github.com/ruby/ruby/blob/trunk/vm.c#L1885
     if (vm_redefinition_check_method_type(me->def)) {
         if (st_lookup(vm_opt_method_def_table, (st_data_t)me->def, &bop)) {
             int flag = vm_redefinition_check_flag(klass);
-            rb_yjit_bop_redefined(klass, me, (enum ruby_basic_operators)bop);
-	    ruby_vm_redefined_flag[bop] |= flag;
-	}
+            if (flag != 0) {
+                rb_yjit_bop_redefined(klass, me, (enum ruby_basic_operators)bop);
+                ruby_vm_redefined_flag[bop] |= flag;
+            }
+        }
     }
 }
 
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