Typecheck instructions are supported for reified T

core/descriptors/src/org/jetbrains/jet/lang/types/TypeUtils.java

@@ -724,6 +724,11 @@ public class TypeUtils {
         return getTypeParameterDescriptorOrNull(type) != null;
     }
 
+    public static boolean isNonReifiedTypeParemeter(@NotNull JetType type) {
+        TypeParameterDescriptor typeParameterDescriptor = getTypeParameterDescriptorOrNull(type);
+        return typeParameterDescriptor != null && !typeParameterDescriptor.isReified();
+    }
+
     @Nullable
     public static TypeParameterDescriptor getTypeParameterDescriptorOrNull(@NotNull JetType type) {
         if (type.getConstructor().getDeclarationDescriptor() instanceof TypeParameterDescriptor) {

core/runtime.jvm/src/kotlin/jvm/internal/Intrinsics.java

@@ -110,6 +110,14 @@ public class Intrinsics {
         throwUndefinedForReified();
     }
 
+    public static void reifyCheckcast(int parameterTypeIndex) {
+        throwUndefinedForReified();
+    }
+
+    public static void reifyInstanceof(int parameterTypeIndex) {
+        throwUndefinedForReified();
+    }
+
     public static <T extends Throwable> T sanitizeStackTrace(T throwable) {
         StackTraceElement[] stackTrace = throwable.getStackTrace();
         ArrayList<StackTraceElement> list = new ArrayList<StackTraceElement>(stackTrace.length);