[K/JS] Exclude kotlinx.serialization synthetic declarations from JsExport

^KT-57024 Fixed

plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/BaseIrGenerator.kt

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.backend.jvm.functionByName
 import org.jetbrains.kotlin.backend.jvm.ir.fileParent
 import org.jetbrains.kotlin.backend.jvm.ir.representativeUpperBound
 import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.deepCopyWithVariables
@@ -18,6 +19,7 @@ import org.jetbrains.kotlin.ir.expressions.IrClassReference
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrExpressionBody
 import org.jetbrains.kotlin.ir.expressions.IrVararg
+import org.jetbrains.kotlin.ir.expressions.impl.IrConstructorCallImpl
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
@@ -27,6 +29,7 @@ import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
 import org.jetbrains.kotlin.ir.types.impl.makeTypeProjection
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.name.*
+import org.jetbrains.kotlin.platform.isJs
 import org.jetbrains.kotlin.types.Variance
 import org.jetbrains.kotlin.util.OperatorNameConventions
 import org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationPluginContext
@@ -64,6 +67,25 @@ abstract class BaseIrGenerator(private val currentClass: IrClass, final override
         return throwMissedFieldExceptionFunc != null && throwMissedFieldExceptionArrayFunc != null
     }
 
+    fun IrDeclaration.excludeFromJsExport() {
+        if (!compilerContext.platform.isJs()) {
+            return
+        }
+        val jsExportIgnore = compilerContext.jsExportIgnoreClass ?: return
+        val jsExportIgnoreCtor = jsExportIgnore.primaryConstructor ?: return
+
+        annotations += IrConstructorCallImpl(
+            UNDEFINED_OFFSET,
+            UNDEFINED_OFFSET,
+            jsExportIgnore.defaultType,
+            jsExportIgnoreCtor.symbol,
+            jsExportIgnore.typeParameters.size,
+            jsExportIgnoreCtor.typeParameters.size,
+            jsExportIgnoreCtor.valueParameters.size,
+        )
+    }
+
+
     private fun getClassListFromFileAnnotation(annotationFqName: FqName): List<IrClassSymbol> {
         val annotation = currentClass.fileParent.annotations.findAnnotation(annotationFqName) ?: return emptyList()
         val vararg = annotation.getValueArgument(0) as? IrVararg ?: return emptyList()

plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/IrBuilderWithPluginContext.kt

@@ -24,7 +24,6 @@ import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.name.*
 import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType
-import org.jetbrains.kotlin.synthetic.syntheticVisibility
 import org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationPluginContext
 
 

plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/IrPreGenerator.kt

@@ -60,6 +60,7 @@ class IrPreGenerator(
         }
         method.apply {
             dispatchReceiverParameter = null // function is static
+            excludeFromJsExport()
         }
 
         val typeParams = irClass.typeParameters.map {
@@ -108,7 +109,7 @@ class IrPreGenerator(
         val ctor = irClass.addConstructor {
             origin = SERIALIZATION_PLUGIN_ORIGIN
             visibility = DescriptorVisibilities.PUBLIC
-        }
+        }.apply { excludeFromJsExport() }
         val markerClassSymbol =
             compilerContext.getClassFromInternalSerializationPackage(SerialEntityNames.SERIAL_CTOR_MARKER_NAME.asString())
         val serializableProperties = serializablePropertiesForIrBackend(irClass).serializableProperties

plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializableCompanionIrGenerator.kt

@@ -178,7 +178,7 @@ class SerializableCompanionIrGenerator(
             type = compilerContext.irBuiltIns.arrayClass.typeWith(kSerializerStarType)
             origin = SERIALIZATION_PLUGIN_ORIGIN
         }
-        return f
+        return f.apply { excludeFromJsExport() }
     }
 
     private fun generateSerializerFactoryIfNeeded(getterDescriptor: IrSimpleFunction) {

plugins/kotlinx-serialization/kotlinx-serialization.backend/src/org/jetbrains/kotlinx/serialization/compiler/extensions/SerializationLoweringExtension.kt

@@ -19,6 +19,8 @@ import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.util.findDeclaration
+import org.jetbrains.kotlin.ir.util.fqNameWhenAvailable
 import org.jetbrains.kotlin.ir.util.getPropertyGetter
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
@@ -33,6 +35,7 @@ import org.jetbrains.kotlinx.serialization.compiler.backend.ir.*
 import org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializationJvmIrIntrinsicSupport
 import org.jetbrains.kotlinx.serialization.compiler.resolve.SerialEntityNames
 import org.jetbrains.kotlinx.serialization.compiler.resolve.SerializationDependencies
+import org.jetbrains.kotlinx.serialization.compiler.resolve.SerializationJsDependenciesClassIds
 import org.jetbrains.kotlinx.serialization.compiler.resolve.SerializationPackages
 import java.util.concurrent.ConcurrentHashMap
 
@@ -75,6 +78,16 @@ class SerializationPluginContext(baseContext: IrPluginContext, val metadataPlugi
     internal val lazyClass = referenceClass(ClassId.topLevel(SerializationDependencies.LAZY_FQ))!!.owner
     internal val lazyValueGetter = lazyClass.getPropertyGetter("value")!!
 
+    internal val jsExportIgnoreClass: IrClass? by lazy {
+        val pkg = SerializationJsDependenciesClassIds.jsExportIgnore.packageFqName
+        val jsExportName = SerializationJsDependenciesClassIds.jsExportIgnore.parentClassId!!.shortClassName
+        val jsExportIgnoreFqName = SerializationJsDependenciesClassIds.jsExportIgnore.asSingleFqName()
+
+        getClassFromRuntimeOrNull(jsExportName.identifier, pkg)
+            ?.owner
+            ?.findDeclaration { it.fqNameWhenAvailable == jsExportIgnoreFqName }
+    }
+
     // serialization runtime declarations
     internal val enumSerializerFactoryFunc = baseContext.referenceFunctions(
         CallableId(