Add test and check that iterator over UInt folds to a simple for-loop

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

@@ -0,0 +1,39 @@
+// !LANGUAGE: +InlineClasses
+
+inline class UInt(private val value: Int)
+
+inline class UIntArray(private val intArray: IntArray) {
+    operator fun iterator(): UIntIterator = UIntIterator(intArray.iterator()) // create iterator
+}
+
+inline class UIntIterator(private val intIterator: IntIterator) : Iterator<UInt> {
+    override fun next(): UInt {
+        return UInt(intIterator.next())
+    }
+
+    override fun hasNext(): Boolean {
+        return intIterator.hasNext()
+    }
+}
+
+fun uIntArrayOf(vararg u: Int): UIntArray = UIntArray(u)
+
+fun test() {
+    val a = uIntArrayOf(1, 2, 3, 4)
+    for (element in a) {
+        takeUInt(element)
+    }
+}
+
+fun takeUInt(u: UInt) {}
+
+// 0 INVOKESTATIC UInt\$Erased.box
+// 0 INVOKEVIRTUAL UInt.unbox
+
+// 0 INVOKEVIRTUAL UIntIterator.iterator
+// 1 INVOKESTATIC kotlin/jvm/internal/ArrayIteratorsKt.iterator
+
+// 0 intValue
+
+// inside wrong bridge
+// 1 valueOf