Generate is check for inline classes same as for primitives

Should be improved when inline class is based on non-null reference

compiler/testData/codegen/bytecodeText/inlineClasses/isCheckForInlineClass.kt

@@ -0,0 +1,25 @@
+// !LANGUAGE: +InlineClasses
+
+inline class UInt(val u: Int) {
+    fun member() {}
+}
+
+fun UInt?.extension() {}
+
+fun test(a: Any, b: Any?) {
+    if (a is UInt) {
+        a.member()
+    }
+
+    if (b is UInt?) {
+        b.extension()
+    }
+}
+
+// 2 INSTANCEOF UInt
+// 1 CHECKCAST UInt
+
+// 1 INVOKEVIRTUAL UInt.unbox
+// 2 INVOKESTATIC UInt\$Erased.member
+
+// 0 intValue