Added tests

backend.native/tests/build.gradle

@@ -1548,6 +1548,11 @@ task boxing15(type: RunKonanTest) {
     source = "codegen/boxing/boxing15.kt"
 }
 
+task boxCache0(type: RunKonanTest) {
+    goldValue = "2\n256\n256\n256\n256\n256\n"
+    source = "codegen/boxing/box_cache0.kt"
+}
+
 task interface0(type: RunKonanTest) {
     goldValue = "PASSED\n"
     source = "runtime/basic/interface0.kt"

backend.native/tests/codegen/boxing/box_cache0.kt

@@ -0,0 +1,49 @@
+package codegen.boxing.box_cache0
+
+import kotlin.test.*
+
+fun <T> areSame(arg1: T, arg2: T): Boolean {
+    return arg1 === arg2
+}
+
+@Test fun runTest() {
+    var acc = 0
+    val range = 1000
+
+    for (i in arrayOf(false, true)) {
+        for (j in arrayOf(false, true)) {
+            acc += areSame(i, j).hashCode()
+        }
+    }
+    println(acc)
+
+    acc = 0
+    for (i in Byte.MIN_VALUE..Byte.MAX_VALUE) {
+        acc += areSame(i, i).hashCode()
+    }
+    println(acc)
+
+    acc = 0
+    for (i in Short.MIN_VALUE..Short.MAX_VALUE) {
+        acc += areSame(i, i).hashCode()
+    }
+    println(acc)
+
+    acc = 0
+    for (i in 0.toChar()..range.toChar()) {
+        acc += areSame(i, i).hashCode()
+    }
+    println(acc)
+
+    acc = 0
+    for (i in -range..range) {
+        acc += areSame(i, i).hashCode()
+    }
+    println(acc)
+
+    acc = 0
+    for (i in -range.toLong()..range.toLong()) {
+        acc += areSame(i, i).hashCode()
+    }
+    println(acc)
+}