8280901: MethodHandle::linkToNative stub is missing w/ -Xint

Backport-of: f86f38a8afd31c76039206f8f1f33371ad814396

src/hotspot/share/classfile/systemDictionary.cpp

@@ -2014,8 +2014,9 @@ Method* SystemDictionary::find_method_handle_intrinsic(vmIntrinsicID iid,
     spe = NULL;
     // Must create lots of stuff here, but outside of the SystemDictionary lock.
     m = Method::make_method_handle_intrinsic(iid, signature, CHECK_NULL);
-    if (!Arguments::is_interpreter_only()) {
+    if (!Arguments::is_interpreter_only() || iid == vmIntrinsics::_linkToNative) {
       // Generate a compiled form of the MH intrinsic.
+      // linkToNative doesn't have interpreter-specific implementation, so always has to go through compiled version.
       AdapterHandlerLibrary::create_native_wrapper(m);
       // Check if have the compiled code.
       if (!m->has_compiled_code()) {

test/jdk/java/foreign/TestDowncall.java

@@ -31,6 +31,10 @@
  * @run testng/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-VerifyDependencies
  *   --enable-native-access=ALL-UNNAMED -Dgenerator.sample.factor=17
  *   TestDowncall
+ *
+ * @run testng/othervm -Xint -XX:+IgnoreUnrecognizedVMOptions -XX:-VerifyDependencies
+ *   --enable-native-access=ALL-UNNAMED -Dgenerator.sample.factor=100000
+ *   TestDowncall
  */
 
 import jdk.incubator.foreign.Addressable;