Method record_dunder_hit

compiler/src/modules/vm/dispatch.rs:135–142

(&self, ip: usize, cache: &mut OpcodeCache, recv: Val, name: &str, arity: u8)

    /* Post-success recording for the instance-dunder IC; ignored when the receiver isn't an instance or the method isn't on its class. */
    #[inline]
    pub(crate) fn record_dunder_hit(&self, ip: usize, cache: &mut OpcodeCache, recv: Val, name: &str, arity: u8) {
        if !recv.is_heap() { return; }
        // try_get is a backstop; callers root operands across the dunder call.
        let Some(HeapObj::Instance(cls, _)) = self.heap.try_get(recv) else { return; };
        let cls = *cls;
        let Some((method, _)) = self.lookup_class_member(cls, name) else { return; };
        cache.record_inst(ip, cls.as_heap(), method, arity);
    }

    /* Main dispatch loop. Walks the fused instruction stream (LoadAttr+Call already collapsed to CallMethod+CallMethodArgs); checks the IC inline for hot arith/compare opcodes. */
    pub(crate) fn exec(&mut self, chunk: &SSAChunk, slots: &mut [Val]) -> Result<Val, VmErr> {