Fix isInitialized receiver generation for empty LHS

#KT-20774 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -2784,7 +2784,7 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
     }
 
     @Nullable
-    private StackValue generateCallableReferenceReceiver(@NotNull ResolvedCall<?> resolvedCall) {
+    public StackValue generateCallableReferenceReceiver(@NotNull ResolvedCall<?> resolvedCall) {
         CallableDescriptor descriptor = resolvedCall.getResultingDescriptor();
         if (descriptor.getExtensionReceiverParameter() == null && descriptor.getDispatchReceiverParameter() == null) return null;
 

compiler/backend/src/org/jetbrains/kotlin/codegen/intrinsics/LateinitIntrinsics.kt

@@ -36,9 +36,9 @@ object LateinitIsInitialized : IntrinsicPropertyGetter() {
 private fun getStackValue(resolvedCall: ResolvedCall<*>, codegen: ExpressionCodegen): StackValue? {
     val expression =
             (resolvedCall.extensionReceiver as? ExpressionReceiver)?.expression as? KtCallableReferenceExpression ?: return null
+    val referenceResolvedCall = expression.callableReference.getResolvedCallWithAssert(codegen.bindingContext)
 
-    // TODO: support properties imported from objects as soon as KT-18982 is fixed
-    val receiver = expression.receiverExpression?.let(codegen::gen) ?: StackValue.none()
+    val receiver = codegen.generateCallableReferenceReceiver(referenceResolvedCall) ?: StackValue.none()
 
     val target = expression.callableReference.getResolvedCallWithAssert(codegen.bindingContext).resultingDescriptor
     return codegen.intermediateValueForProperty(target as PropertyDescriptor, true, false, null, false, receiver, null, true)

compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/emptyLhs.kt

@@ -0,0 +1,50 @@
+// WITH_RUNTIME
+
+package test
+
+import kotlin.reflect.KProperty
+import test.Derived.p
+
+class Foo {
+    lateinit var p: String
+
+    fun test(): Boolean {
+        if (!::p.isInitialized) {
+            p = "OK"
+            return false
+        }
+        return true
+    }
+}
+
+object Bar {
+    lateinit var p: String
+
+    fun test(): Boolean {
+        if (!::p.isInitialized) {
+            p = "OK"
+            return false
+        }
+        return true
+    }
+}
+
+open class Base(val b: Boolean)
+
+object Derived : Base(::p.isInitialized) {
+    lateinit var p: String
+}
+
+fun box(): String {
+    val foo = Foo()
+    if (foo.test()) return "Fail 1"
+    if (!foo.test()) return "Fail 2"
+
+    val bar = Bar
+    if (bar.test()) return "Fail 3"
+    if (!bar.test()) return "Fail 4"
+
+    if (Derived.b) return "Fail 5"
+
+    return bar.p
+}

compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -13908,6 +13908,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                     KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
                 }
 
+                @TestMetadata("emptyLhs.kt")
+                public void testEmptyLhs() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/emptyLhs.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("innerSubclass.kt")
                 public void testInnerSubclass() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/innerSubclass.kt");

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -13908,6 +13908,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                     KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
                 }
 
+                @TestMetadata("emptyLhs.kt")
+                public void testEmptyLhs() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/emptyLhs.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("innerSubclass.kt")
                 public void testInnerSubclass() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/innerSubclass.kt");

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -13908,6 +13908,12 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                     KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
                 }
 
+                @TestMetadata("emptyLhs.kt")
+                public void testEmptyLhs() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/emptyLhs.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("innerSubclass.kt")
                 public void testInnerSubclass() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/innerSubclass.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -15240,6 +15240,12 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                     KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JS, true);
                 }
 
+                @TestMetadata("emptyLhs.kt")
+                public void testEmptyLhs() throws Exception {
+                    String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/emptyLhs.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("innerSubclass.kt")
                 public void testInnerSubclass() throws Exception {
                     String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/properties/lateinit/isInitializedAndDeinitialize/innerSubclass.kt");