YJIT: Add a few missing counters for send fallback (#8681)

yjit.rb

@@ -295,7 +295,7 @@ module RubyVM::YJIT
       out.puts "num_send:              " + format_number(13, stats[:num_send])
       out.puts "num_send_known_class:  " + format_number_pct(13, stats[:num_send_known_class], stats[:num_send])
       out.puts "num_send_polymorphic:  " + format_number_pct(13, stats[:num_send_polymorphic], stats[:num_send])
-      out.puts "num_send_megamorphic:  " + format_number_pct(13, stats[:num_send_megamorphic], stats[:num_send])
+      out.puts "num_send_megamorphic:  " + format_number_pct(13, stats[:send_megamorphic], stats[:num_send])
       out.puts "num_send_dynamic:      " + format_number_pct(13, stats[:num_send_dynamic], stats[:num_send])
       if stats[:num_send_x86_rel32] != 0 || stats[:num_send_x86_reg] != 0
         out.puts "num_send_x86_rel32:    " + format_number(13,  stats[:num_send_x86_rel32])

yjit/src/codegen.rs

@@ -6974,7 +6974,7 @@ fn gen_send_general(
     }
     // If megamorphic, let the caller fallback to dynamic dispatch
     if asm.ctx.get_chain_depth() as i32 >= SEND_MAX_DEPTH {
-        gen_counter_incr(asm, Counter::num_send_megamorphic);
+        gen_counter_incr(asm, Counter::send_megamorphic);
         return None;
     }
 
@@ -6993,7 +6993,7 @@ fn gen_send_general(
     // Do method lookup
     let mut cme = unsafe { rb_callable_method_entry(comptime_recv_klass, mid) };
     if cme.is_null() {
-        // TODO: counter
+        gen_counter_incr(asm, Counter::send_cme_not_found);
         return None;
     }
 
@@ -7006,6 +7006,7 @@ fn gen_send_general(
             if flags & VM_CALL_FCALL == 0 {
                 // Can only call private methods with FCALL callsites.
                 // (at the moment they are callsites without a receiver or an explicit `self` receiver)
+                gen_counter_incr(asm, Counter::send_private_not_fcall);
                 return None;
             }
         }

yjit/src/stats.rs

@@ -255,8 +255,11 @@ make_counters! {
     send_call_block,
     send_call_kwarg,
     send_call_multi_ractor,
+    send_cme_not_found,
+    send_megamorphic,
     send_missing_method,
     send_refined_method,
+    send_private_not_fcall,
     send_cfunc_ruby_array_varg,
     send_cfunc_argc_mismatch,
     send_cfunc_toomany_args,
@@ -469,7 +472,6 @@ make_counters! {
 
     num_send,
     num_send_known_class,
-    num_send_megamorphic,
     num_send_polymorphic,
     num_send_x86_rel32,
     num_send_x86_reg,