[K/N] Force static constants and boxing caches be same values

^KT-49403

kotlin-native/backend.native/tests/codegen/initializers/static.kt

@@ -172,4 +172,36 @@ inline fun invokeAndReturnKClass(block: ()->Boolean) : KClass<*> {
         assertTrue(clazz.isPermanent())
         assertEquals("kotlin.Int", clazz.qualifiedName)
     }
+}
+
+@Test fun testSmallIntIdentity() {
+    val xBool = true
+    val xBoolStatic : Any = false
+    val xBoolDyanmic : Any = !xBool
+    assertSame(xBoolStatic, xBoolDyanmic)
+
+    val xByte = 1.toByte()
+    val xByteStatic : Any = 2.toByte()
+    val xByteDyanmic : Any = (xByte + xByte).toByte()
+    assertSame(xByteStatic, xByteDyanmic)
+
+    val xShort = 1.toShort()
+    val xShortStatic : Any = 2.toShort()
+    val xShortDyanmic : Any = (xShort + xShort).toShort()
+    assertSame(xShortStatic, xShortDyanmic)
+
+    val xInt = 1.toInt()
+    val xIntStatic : Any = 2.toInt()
+    val xIntDyanmic : Any = xInt + xInt
+    assertSame(xIntStatic, xIntDyanmic)
+
+    val xChar = 1.toChar()
+    val xCharStatic : Any = 2.toChar()
+    val xCharDyanmic : Any = (xChar.code + xChar.code).toChar()
+    assertSame(xCharStatic, xCharDyanmic)
+
+    val xLong = 1.toLong()
+    val xLongStatic = 2.toLong()
+    val xLongDyanmic = xLong + xLong
+    assertSame(xLongStatic, xLongDyanmic)
 }