[K/JS, K/Wasm] Optimize simple objects declaration and usage ^Fixed KT-58797

js/js.translator/testData/box/classObject/objectLazyInitialized.kt

@@ -0,0 +1,55 @@
+// EXPECTED_REACHABLE_NODES: 1291
+// See KT-6201
+package foo
+
+import kotlin.reflect.KProperty
+
+var log = ""
+
+open class Mixin {
+    init {
+        log = "mixin"
+    }
+}
+
+fun initCall(): Number {
+    log = "initCall"
+    return 2
+}
+
+object O1 {
+    init {
+        log = "O1 init"
+    }
+}
+
+object O2 {
+    init {
+        initCall()
+    }
+}
+
+object O3 : Mixin()
+
+object O4 {
+    val someValue = initCall()
+}
+
+object O5 {
+    val someValue = O3.also { log = "O5 also" }
+}
+
+fun box(): String {
+    if (log != "") return "Fail: something was initialized before any object was used"
+    O1
+    if (log != "O1 init") return "Fail: O1 didn't initialized lazy"
+    O2
+    if (log != "initCall") return "Fail: O2 didn't initialized lazy"
+    O3
+    if (log != "mixin") return "Fail: O3 didn't initialized lazy"
+    O4
+    if (log != "initCall") return "Fail: O4 didn't initialized lazy"
+    O5
+    if (log != "O5 also") return "Fail: O5 didn't initialized lazy"
+    return "OK"
+}