Added codegen test for local escape analysis

backend.native/tests/build.gradle

@@ -4428,6 +4428,18 @@ task metadata_compare_typedefs(type: MetadataComparisonTest) {
     defFile = "interop/basics/typedefs.def"
 }
 
+standaloneTest("local_ea_arraysfieldwrite") {
+    disabled = (cacheTesting != null) // Cache is not compatible with -opt.
+    goldValue = "Array (constructor init):\nSize: 2\nContents: [1, 2]\n" +
+            "Array (constructor init):\nSize: 2\nContents: [3, 4]\n" +
+            "Array (default value init):\nSize: 2\nContents: [1, 2]\n" +
+            "Array (default value init):\nSize: 2\nContents: [3, 4]\n" +
+            "Array (init block):\nSize: 2\nContents: [1, 2]\n" +
+            "Array (init block):\nSize: 2\nContents: [3, 4]\n"
+    flags = ["-opt"]
+    source = "codegen/localEscapeAnalysis/arraysFieldWrite.kt"
+}
+
 /**
  * Creates tasks to build and execute stdlib tests.
  */

backend.native/tests/codegen/localEscapeAnalysis/arraysFieldWrite.kt

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+class ArraysConstructor {
+    private val memberArray: IntArray
+    constructor(int1: Int, int2: Int) {
+        memberArray = IntArray(2)
+        set(int1, int2)
+    }
+    fun set(int1: Int, int2: Int) {
+        memberArray[0] = int1
+        memberArray[1] = int2
+    }
+    fun log() {
+        println("Array (constructor init):")
+        println("Size: ${memberArray.size}")
+        println("Contents: ${memberArray.contentToString()}")
+    }
+}
+
+class ArraysDefault {
+    private val memberArray = IntArray(2)
+    constructor(int1: Int, int2: Int) {
+        set(int1, int2)
+    }
+    fun set(int1: Int, int2: Int) {
+        memberArray[0] = int1
+        memberArray[1] = int2
+    }
+    fun log() {
+        println("Array (default value init):")
+        println("Size: ${memberArray.size}")
+        println("Contents: ${memberArray.contentToString()}")
+    }
+}
+
+class ArraysInitBlock {
+    private val memberArray : IntArray
+    init {
+        memberArray = IntArray(2)
+    }
+    constructor(int1: Int, int2: Int) {
+        set(int1, int2)
+    }
+    fun set(int1: Int, int2: Int) {
+        memberArray[0] = int1
+        memberArray[1] = int2
+    }
+    fun log() {
+        println("Array (init block):")
+        println("Size: ${memberArray.size}")
+        println("Contents: ${memberArray.contentToString()}")
+    }
+}
+
+fun main() {
+    val array1 = (::ArraysConstructor)(1, 2)
+    array1.log()
+    array1.set( 3, 4)
+    array1.log()
+
+    val array2 = (::ArraysDefault)(1, 2)
+    array2.log()
+    array2.set( 3, 4)
+    array2.log()
+
+    val array3 = (::ArraysInitBlock)(1, 2)
+    array3.log()
+    array3.set( 3, 4)
+    array3.log()
+}