KT-16077 Redundant private getter for private var in a class within a JvmMultifileClass annotated file

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

@@ -57,7 +57,6 @@ import java.util.List;
 
 import static org.jetbrains.kotlin.codegen.AsmUtil.getDeprecatedAccessFlag;
 import static org.jetbrains.kotlin.codegen.AsmUtil.getVisibilityForBackingField;
-import static org.jetbrains.kotlin.codegen.AsmUtil.isPropertyWithBackingFieldCopyInOuterClass;
 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isConstOrHasJvmFieldAnnotation;
 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isJvmInterface;
 import static org.jetbrains.kotlin.codegen.serialization.JvmSerializationBindings.FIELD_FOR_PROPERTY;
@@ -189,7 +188,7 @@ public class PropertyCodegen {
         if (isCompanionObject(descriptor.getContainingDeclaration())) return true;
 
         // Non-const properties from multifile classes have accessors regardless of visibility
-        if (!descriptor.isConst() && JvmFileClassUtilKt.isInsideJvmMultifileClassFile(declaration)) return true;
+        if (isNonConstTopLevelPropertyInMultifileClass(declaration, descriptor)) return true;
 
         // Private class properties have accessors only in cases when those accessors are non-trivial
         if (Visibilities.isPrivate(descriptor.getVisibility())) {
@@ -199,6 +198,15 @@ public class PropertyCodegen {
         return true;
     }
 
+    private static boolean isNonConstTopLevelPropertyInMultifileClass(
+            @NotNull KtProperty declaration,
+            @NotNull PropertyDescriptor descriptor
+    ) {
+        return !descriptor.isConst() &&
+               descriptor.getContainingDeclaration() instanceof PackageFragmentDescriptor &&
+               JvmFileClassUtilKt.isInsideJvmMultifileClassFile(declaration);
+    }
+
     private static boolean areAccessorsNeededForPrimaryConstructorProperty(
             @NotNull PropertyDescriptor descriptor
     ) {

compiler/testData/codegen/box/multifileClasses/kt16077.kt

@@ -0,0 +1,11 @@
+// IGNORE_BACKEND: JS
+// WITH_RUNTIME
+
+@file:JvmMultifileClass
+
+class A {
+    private var r: String = "fail"
+    public fun getR(): String = "OK"
+}
+
+fun box() = A().getR()

compiler/testData/codegen/light-analysis/multifileClasses/kt16077.txt

@@ -0,0 +1,12 @@
+@kotlin.Metadata
+public final class A {
+    private field r: java.lang.String
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getR(): java.lang.String
+}
+
+@kotlin.Metadata
+@kotlin.jvm.JvmMultifileClass
+public final class Kt16077Kt {
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+}

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

@@ -10787,6 +10787,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             doTest(fileName);
         }
 
+        @TestMetadata("kt16077.kt")
+        public void testKt16077() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/multifileClasses/kt16077.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("multifileClassPartsInitialization.kt")
         public void testMultifileClassPartsInitialization() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/multifileClasses/multifileClassPartsInitialization.kt");

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

@@ -10787,6 +10787,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("kt16077.kt")
+        public void testKt16077() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/multifileClasses/kt16077.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("multifileClassPartsInitialization.kt")
         public void testMultifileClassPartsInitialization() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/multifileClasses/multifileClassPartsInitialization.kt");

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

@@ -12366,6 +12366,18 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
         }
 
+        @TestMetadata("kt16077.kt")
+        public void testKt16077() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/multifileClasses/kt16077.kt");
+            try {
+                doTest(fileName);
+            }
+            catch (Throwable ignore) {
+                return;
+            }
+            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+        }
+
         @TestMetadata("multifileClassPartsInitialization.kt")
         public void testMultifileClassPartsInitialization() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/multifileClasses/multifileClassPartsInitialization.kt");