Generate static backing fields for properties in object

#KT-4973 Fixed

compiler/testData/codegen/box/staticFields/anonymousInitializerIObject.kt

@@ -0,0 +1,11 @@
+object Foo {
+    val bar: String
+
+    {
+        bar = "OK"
+    }
+}
+
+fun box(): String {
+    return Foo.bar
+}

compiler/testData/codegen/box/staticFields/classObjectInc.kt

@@ -1,17 +0,0 @@
-
-class A {
-    class object {
-        private var r: Int = 1;
-
-        fun a(): Int {
-            r++
-            ++r
-            return r
-        }
-    }
-}
-
-fun box() : String {
-    val p = A.a()
-    return if (p == 3) return "OK" else "fail"
-}

compiler/testData/codegen/box/staticFields/incInClassObject.kt

@@ -0,0 +1,74 @@
+
+class A {
+    class object {
+        private var r: Int = 1;
+
+        fun test(): Int {
+            r++
+            ++r
+            return r
+        }
+
+        var holder: String = ""
+
+        var r2: Int = 1;
+            get() {
+                holder += "getR2"
+                return $r2
+            }
+
+        fun test2() : Int {
+            r2++
+            ++r2
+            return $r2
+        }
+
+        var r3: Int = 1;
+            set(p: Int) {
+                holder += "setR3"
+                $r3 = p
+            }
+
+        fun test3() : Int {
+            r3++
+            ++r3
+            return $r3
+        }
+
+        var r4: Int = 1;
+            get() {
+                holder += "getR4"
+                return $r4
+            }
+            set(p: Int) {
+                holder += "setR4"
+                $r4 = p
+            }
+
+        fun test4() : Int {
+            r4++
+            holder += ":"
+            ++r4
+            return $r4
+        }
+    }
+}
+
+fun box() : String {
+    val p = A.test()
+    if (p != 3) return "fail 1: $p"
+
+    val p2 = A.test2()
+    var holderValue = A.holder
+    if (p2 != 3 || holderValue != "getR2getR2getR2") return "fail 2:  $p2 ${holderValue}"
+
+    A.holder = ""
+    val p3 = A.test3()
+    if (p3 != 3 || A.holder != "setR3setR3") return "fail 3:  $p3 ${A.holder}"
+
+    A.holder = ""
+    val p4 = A.test4()
+    if (p4 != 3 || A.holder != "getR4setR4:getR4setR4getR4") return "fail 4:  $p4 ${A.holder}"
+
+    return "OK"
+}

compiler/testData/codegen/box/staticFields/incInObject.kt

@@ -0,0 +1,71 @@
+object A {
+    private var r: Int = 1;
+
+    fun test() : Int {
+        r++
+        ++r
+        return r
+    }
+
+    var holder: String = ""
+
+    var r2: Int = 1;
+        get() {
+            holder += "getR2"
+            return $r2
+        }
+
+    fun test2() : Int {
+        r2++
+        ++r2
+        return $r2
+    }
+
+    var r3: Int = 1;
+        set(p: Int) {
+            holder += "setR3"
+            $r3 = p
+        }
+
+    fun test3() : Int {
+        r3++
+        ++r3
+        return $r3
+    }
+
+    var r4: Int = 1;
+        get() {
+            holder += "getR4"
+            return $r4
+        }
+        set(p: Int) {
+            holder += "setR4"
+            $r4 = p
+        }
+
+    fun test4() : Int {
+        r4++
+        holder += ":"
+        ++r4
+        return $r4
+    }
+}
+
+fun box() : String {
+    val p = A.test()
+    if (p != 3) return "fail 1: $p"
+
+    val p2 = A.test2()
+    val holderValue = A.holder
+    if (p2 != 3 || holderValue != "getR2getR2getR2") return "fail 2:  $p2 ${holderValue}"
+
+    A.holder = ""
+    val p3 = A.test3()
+    if (p3 != 3 || A.holder != "setR3setR3") return "fail 3:  $p3 ${A.holder}"
+
+    A.holder = ""
+    val p4 = A.test4()
+    if (p4 != 3 || A.holder != "getR4setR4:getR4setR4getR4") return "fail 4:  $p4 ${A.holder}"
+
+    return "OK"
+}

compiler/testData/codegen/box/staticFields/objectInc.kt

@@ -1,14 +0,0 @@
-object A {
-    private var r: Int = 1;
-
-    fun a() : Int {
-        r++
-        ++r
-        return r
-    }
-}
-
-fun box() : String {
-    val p = A.a()
-    return if (p == 3) return "OK" else "fail"
-}

compiler/testData/codegen/box/staticFields/syntheticAccessor.kt

@@ -0,0 +1,12 @@
+object A {
+    private val p = "OK";
+
+    object B {
+        val z = p;
+    }
+
+}
+
+fun box(): String {
+    return A.B.z
+}