Initial boxing for inline classes: local variable assignments

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

@@ -0,0 +1,52 @@
+// !LANGUAGE: +InlineClasses
+
+inline class InlineNotNullPrimitive(val x: Int)
+inline class InlineNullablePrimitive(val x: Int?)
+inline class InlineNotNullReference(val a: Any)
+inline class InlineNullableReference(val a: Any?)
+
+fun test1(a: InlineNotNullPrimitive) {
+    val a0 = a
+    val a1: Any = a // box
+    val a2: Any? = a // box
+    val a3: InlineNotNullPrimitive = a
+    val a4: InlineNotNullPrimitive? = a // box
+}
+
+fun test2(b: InlineNullablePrimitive) {
+    val b0 = b
+    val b1: Any = b // box
+    val b2: Any? = b // box
+    val b3: InlineNullablePrimitive = b
+    val b4: InlineNullablePrimitive? = b // box
+}
+
+fun test3(c: InlineNotNullReference) {
+    val c0 = c
+    val c1: Any = c // box
+    val c2: Any? = c // box
+    val c3: InlineNotNullReference = c
+    val c4: InlineNotNullReference? = c
+}
+
+fun test4(d: InlineNullableReference) {
+    val d0 = d
+    val d1: Any = d // box
+    val d2: Any? = d // box
+    val d3: InlineNullableReference = d
+    val d4: InlineNullableReference? = d // box
+}
+
+fun box(): String {
+    val a = InlineNotNullPrimitive(1)
+    val b = InlineNullablePrimitive(1)
+    val c = InlineNotNullReference("some")
+    val d = InlineNullableReference("other")
+
+    test1(a)
+    test2(b)
+    test3(c)
+    test4(d)
+
+    return "OK"
+}