Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/nullableEqeqNonNullGeneric.kt

@@ -0,0 +1,22 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Z<T: Int>(val value: T)
+
+fun eq(a: Z<Int>?, b: Z<Int>) = a == b
+
+fun eqq(a: Z<Int>, b: Z<Int>?) = a == b
+
+fun box(): String {
+    if (!eq(Z(1), Z(1))) throw AssertionError()
+    if (eq(Z(1), Z(2))) throw AssertionError()
+    if (eq(null, Z(0))) throw AssertionError()
+
+    if (!eqq(Z(1), Z(1))) throw AssertionError()
+    if (eqq(Z(1), Z(2))) throw AssertionError()
+    if (eqq(Z(0), null)) throw AssertionError()
+
+    return "OK"
+}