Port 3.14-specific 64-bit code of Py_INCREF

Author: clin1234

pyo3-ffi/src/object.rs

@@ -650,7 +650,16 @@ pub unsafe fn Py_INCREF(op: *mut PyObject) {
         GraalPy
     )))]
     {
-        #[cfg(all(Py_3_12, target_pointer_width = "64"))]
+        #[cfg(all(Py_3_14, target_pointer_width = "64"))]
+        {
+            let cur_refcnt = (*op).ob_refcnt.ob_refcnt;
+            if (cur_refcnt as i32) < 0 {
+                return;
+            }
+            (*op).ob_refcnt.ob_refcnt = cur_refcnt.wrapping_add(1);
+        }
+
+        #[cfg(all(Py_3_12, not(Py_3_14), target_pointer_width = "64"))]
         {
             let cur_refcnt = (*op).ob_refcnt.ob_refcnt_split[crate::PY_BIG_ENDIAN];
             let new_refcnt = cur_refcnt.wrapping_add(1);