diff --git a/compiler/ir/serialization.common/src/KotlinIr.proto b/compiler/ir/serialization.common/src/KotlinIr.proto
index c3625430fa5..6a1eeb434fa 100644
--- a/compiler/ir/serialization.common/src/KotlinIr.proto
+++ b/compiler/ir/serialization.common/src/KotlinIr.proto
@@ -79,7 +79,7 @@ message IrFile {
   repeated UniqId declaration_id = 1;
   required FileEntry file_entry = 2;
   repeated int32 fq_name = 3;
-  required Annotations annotations = 4;
+  repeated IrConstructorCall annotation = 4;
   repeated int32 explicitly_exported_to_compiler = 5;
 }
 
@@ -123,10 +123,6 @@ enum IrTypeVariance { // Should we import metadata variance, or better stay sepa
                       INV = 2;
 }
 
-message Annotations {
-  repeated IrConstructorCall annotation = 1;
-}
-
 message TypeArguments {
   repeated int32 type_argument = 1;
 }
@@ -148,7 +144,7 @@ message IrTypeArgument {
 }
 
 message IrSimpleType {
-  required Annotations annotations = 1;
+  repeated IrConstructorCall annotation = 1;
   required int32 classifier = 2;
   required bool has_question_mark = 3;
   repeated IrTypeArgument argument = 4;
@@ -156,18 +152,18 @@ message IrSimpleType {
 }
 
 message IrTypeAbbreviation {
-  required Annotations annotations = 1;
+  repeated IrConstructorCall annotation = 1;
   required int32 type_alias = 2;
   required bool has_question_mark = 3;
   repeated IrTypeArgument argument = 4;
 }
 
 message IrDynamicType {
-  required Annotations annotations = 1;
+  repeated IrConstructorCall annotation = 1;
 }
 
 message IrErrorType {
-  required Annotations annotations = 1;
+  repeated IrConstructorCall annotation = 1;
 }
 
 message IrType {
@@ -508,7 +504,7 @@ message IrDeclarationBase {
   required int32 symbol = 1;
   required IrDeclarationOrigin origin = 2;
   required Coordinates coordinates = 3;
-  required Annotations annotations = 4;
+  repeated IrConstructorCall annotation = 4;
 }
 
 message IrFunctionBase {
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt
index d5c410ff27d..0834dcc8839 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileDeserializer.kt
@@ -39,7 +39,6 @@ import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedTypeParameterDescriptor
 import org.jetbrains.kotlin.types.Variance
-import org.jetbrains.kotlin.backend.common.serialization.proto.Annotations as ProtoAnnotations
 import org.jetbrains.kotlin.backend.common.serialization.proto.ClassKind as ProtoClassKind
 import org.jetbrains.kotlin.backend.common.serialization.proto.DescriptorReference as ProtoDescriptorReference
 import org.jetbrains.kotlin.backend.common.serialization.proto.IrAnonymousInit as ProtoAnonymousInit
@@ -180,8 +179,8 @@ abstract class IrFileDeserializer(
 
     }
 
-    fun deserializeAnnotations(annotations: ProtoAnnotations): List<IrConstructorCall> {
-        return annotations.annotationList.map {
+    fun deserializeAnnotations(annotations: List<ProtoConstructorCall>): List<IrConstructorCall> {
+        return annotations.map {
             deserializeConstructorCall(it, 0, 0, builtIns.unitType) // TODO: need a proper deserialization here
         }
     }
@@ -192,7 +191,7 @@ abstract class IrFileDeserializer(
         logger.log { "deserializeSimpleType: symbol=$symbol" }
 
         val arguments = proto.argumentList.map { deserializeIrTypeArgument(it) }
-        val annotations = deserializeAnnotations(proto.annotations)
+        val annotations = deserializeAnnotations(proto.annotationList)
 
         val result: IrSimpleType = IrSimpleTypeImpl(
             null,
@@ -215,16 +214,16 @@ abstract class IrFileDeserializer(
             },
             proto.hasQuestionMark,
             proto.argumentList.map { deserializeIrTypeArgument(it) },
-            deserializeAnnotations(proto.annotations)
+            deserializeAnnotations(proto.annotationList)
         )
 
     private fun deserializeDynamicType(proto: ProtoDynamicType): IrDynamicType {
-        val annotations = deserializeAnnotations(proto.annotations)
+        val annotations = deserializeAnnotations(proto.annotationList)
         return IrDynamicTypeImpl(null, annotations, Variance.INVARIANT)
     }
 
     private fun deserializeErrorType(proto: ProtoErrorType): IrErrorType {
-        val annotations = deserializeAnnotations(proto.annotations)
+        val annotations = deserializeAnnotations(proto.annotationList)
         return IrErrorTypeImpl(null, annotations, Variance.INVARIANT)
     }
 
@@ -912,7 +911,7 @@ abstract class IrFileDeserializer(
             proto.coordinates.startOffset, proto.coordinates.endOffset,
             deserializeIrDeclarationOrigin(proto.origin)
         )
-        result.annotations.addAll(deserializeAnnotations(proto.annotations))
+        result.annotations.addAll(deserializeAnnotations(proto.annotationList))
         result.parent = parentsStack.peek()!!
         return result
     }
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt
index 5733fdc3c5d..75e5ada1ede 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt
@@ -30,7 +30,6 @@ import org.jetbrains.kotlin.library.impl.IrMemoryDeclarationWriter
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.types.Variance
-import org.jetbrains.kotlin.backend.common.serialization.proto.Annotations as ProtoAnnotations
 import org.jetbrains.kotlin.backend.common.serialization.proto.ClassKind as ProtoClassKind
 import org.jetbrains.kotlin.backend.common.serialization.proto.Coordinates as ProtoCoordinates
 import org.jetbrains.kotlin.backend.common.serialization.proto.FieldAccessCommon as ProtoFieldAccessCommon
@@ -294,19 +293,8 @@ open class IrFileSerializer(
         Variance.INVARIANT -> ProtoTypeVariance.INV
     }
 
-    private fun serializeAnnotations(annotations: List<IrConstructorCall>): ProtoAnnotations {
-        val proto = ProtoAnnotations.newBuilder()
-        annotations.forEach {
-            proto.addAnnotation(serializeConstructorCall(it))
-        }
-        return proto.build()
-    }
-
-    private fun serializeFqName(fqName: FqName): List<Int> {
-//        val proto = ProtoFqName.newBuilder()
-//        fqName.pathSegments().forEach {
-//            proto.addSegment(serializeString(it.identifier))
-//        }
+    private fun serializeAnnotations(annotations: List<IrConstructorCall>) =
+        annotations.map { serializeConstructorCall(it) }
 
     private fun serializeFqName(fqName: FqName) = fqName.pathSegments().map { serializeString(it.identifier) }
 
@@ -330,7 +318,7 @@ open class IrFileSerializer(
 
     private fun serializeSimpleType(type: IrSimpleType): ProtoSimpleType {
         val proto = ProtoSimpleType.newBuilder()
-            .setAnnotations(serializeAnnotations(type.annotations))
+            .addAllAnnotation(serializeAnnotations(type.annotations))
             .setClassifier(serializeIrSymbol(type.classifier))
             .setHasQuestionMark(type.hasQuestionMark)
         type.abbreviation?.let {
@@ -344,7 +332,7 @@ open class IrFileSerializer(
 
     private fun serializeIrTypeAbbreviation(typeAbbreviation: IrTypeAbbreviation): ProtoTypeAbbreviation {
         val proto = ProtoTypeAbbreviation.newBuilder()
-            .setAnnotations(serializeAnnotations(typeAbbreviation.annotations))
+            .addAllAnnotation(serializeAnnotations(typeAbbreviation.annotations))
             .setTypeAlias(serializeIrSymbol(typeAbbreviation.typeAlias))
             .setHasQuestionMark(typeAbbreviation.hasQuestionMark)
         typeAbbreviation.arguments.forEach {
@@ -354,11 +342,11 @@ open class IrFileSerializer(
     }
 
     private fun serializeDynamicType(type: IrDynamicType): ProtoDynamicType = ProtoDynamicType.newBuilder()
-        .setAnnotations(serializeAnnotations(type.annotations))
+        .addAllAnnotation(serializeAnnotations(type.annotations))
         .build()
 
     private fun serializeErrorType(type: IrErrorType): ProtoErrorType = ProtoErrorType.newBuilder()
-        .setAnnotations(serializeAnnotations(type.annotations))
+        .addAllAnnotation(serializeAnnotations(type.annotations))
         .build()
 
     private fun serializeIrTypeData(type: IrType): ProtoType {
@@ -997,7 +985,7 @@ open class IrFileSerializer(
         ProtoDeclarationBase.newBuilder()
             .setSymbol(serializeIrSymbol((declaration as IrSymbolOwner).symbol))
             .setCoordinates(serializeCoordinates(declaration.startOffset, declaration.endOffset))
-            .setAnnotations(serializeAnnotations(declaration.annotations))
+            .addAllAnnotation(serializeAnnotations(declaration.annotations))
             .setOrigin(serializeIrDeclarationOrigin(declaration.origin))
             .build()
 
@@ -1278,7 +1266,7 @@ open class IrFileSerializer(
         val proto = ProtoFile.newBuilder()
             .setFileEntry(serializeFileEntry(file.fileEntry))
             .addAllFqName(serializeFqName(file.fqName))
-            .setAnnotations(serializeAnnotations(file.annotations))
+            .addAllAnnotation(serializeAnnotations(file.annotations))
 
         file.declarations.forEach {
             if (it.descriptor.isExpectMember && !it.descriptor.isSerializableExpectClass) {
@@ -1290,7 +1278,7 @@ open class IrFileSerializer(
             val uniqId = declarationTable.uniqIdByDeclaration(it)
             topLevelDeclarations.add(TopLevelDeclaration(uniqId.index, uniqId.isLocal, it.descriptor.toString(), byteArray))
             if (uniqId.isPublic) {
-                proto.addDeclarationId(protoUniqId(uniqId))
+                proto.addDeclarationId(uniqId.index)
             }
         }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt
index 0a9f29a548e..c65241594f1 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt
@@ -132,7 +132,7 @@ abstract class KotlinIrLinker(
         // This is a heavy initializer
         val module = deserializeIrModuleHeader()
 
-        inner class IrDeserializerForFile(private var annotationsProto: ProtoAnnotations?, private val fileIndex: Int, onlyHeaders: Boolean) :
+        inner class IrDeserializerForFile(private var annotations: List<ProtoConstructorCall>?, private val fileIndex: Int, onlyHeaders: Boolean) :
             IrFileDeserializer(logger, builtIns, symbolTable) {
 
             private var fileLoops = mutableMapOf<Int, IrLoopBase>()
@@ -373,9 +373,9 @@ abstract class KotlinIrLinker(
             }
 
             fun deserializeFileAnnotationsIfFirstUse() {
-                annotationsProto?.let {
+                annotations?.let {
                     file.annotations.addAll(deserializeAnnotations(it))
-                    annotationsProto = null
+                    annotations = null
                 }
             }
 
@@ -396,7 +396,7 @@ abstract class KotlinIrLinker(
 
             val fileEntry = NaiveSourceBasedFileEntryImpl(fileName, fileProto.fileEntry.lineStartOffsetsList.toIntArray())
 
-            val fileDeserializer = IrDeserializerForFile(fileProto.annotations, fileIndex, !deserializationStrategy.needBodies)
+            val fileDeserializer = IrDeserializerForFile(fileProto.annotationList, fileIndex, !deserializationStrategy.needBodies)
 
             val fqName = fileDeserializer.deserializeFqName(fileProto.fqNameList)
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/Annotations.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/Annotations.java
deleted file mode 100644
index 0b36e14e68a..00000000000
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/Annotations.java
+++ /dev/null
@@ -1,479 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: compiler/ir/serialization.common/src/KotlinIr.proto
-
-package org.jetbrains.kotlin.backend.common.serialization.proto;
-
-/**
- * Protobuf type {@code org.jetbrains.kotlin.backend.common.serialization.proto.Annotations}
- */
-public final class Annotations extends
-    org.jetbrains.kotlin.protobuf.GeneratedMessageLite implements
-    // @@protoc_insertion_point(message_implements:org.jetbrains.kotlin.backend.common.serialization.proto.Annotations)
-    AnnotationsOrBuilder {
-  // Use Annotations.newBuilder() to construct.
-  private Annotations(org.jetbrains.kotlin.protobuf.GeneratedMessageLite.Builder builder) {
-    super(builder);
-    this.unknownFields = builder.getUnknownFields();
-  }
-  private Annotations(boolean noInit) { this.unknownFields = org.jetbrains.kotlin.protobuf.ByteString.EMPTY;}
-
-  private static final Annotations defaultInstance;
-  public static Annotations getDefaultInstance() {
-    return defaultInstance;
-  }
-
-  public Annotations getDefaultInstanceForType() {
-    return defaultInstance;
-  }
-
-  private final org.jetbrains.kotlin.protobuf.ByteString unknownFields;
-  private Annotations(
-      org.jetbrains.kotlin.protobuf.CodedInputStream input,
-      org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException {
-    initFields();
-    int mutable_bitField0_ = 0;
-    org.jetbrains.kotlin.protobuf.ByteString.Output unknownFieldsOutput =
-        org.jetbrains.kotlin.protobuf.ByteString.newOutput();
-    org.jetbrains.kotlin.protobuf.CodedOutputStream unknownFieldsCodedOutput =
-        org.jetbrains.kotlin.protobuf.CodedOutputStream.newInstance(
-            unknownFieldsOutput);
-    try {
-      boolean done = false;
-      while (!done) {
-        int tag = input.readTag();
-        switch (tag) {
-          case 0:
-            done = true;
-            break;
-          default: {
-            if (!parseUnknownField(input, unknownFieldsCodedOutput,
-                                   extensionRegistry, tag)) {
-              done = true;
-            }
-            break;
-          }
-          case 10: {
-            if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
-              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
-              mutable_bitField0_ |= 0x00000001;
-            }
-            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
-            break;
-          }
-        }
-      }
-    } catch (org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException e) {
-      throw e.setUnfinishedMessage(this);
-    } catch (java.io.IOException e) {
-      throw new org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException(
-          e.getMessage()).setUnfinishedMessage(this);
-    } finally {
-      if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
-        annotation_ = java.util.Collections.unmodifiableList(annotation_);
-      }
-      try {
-        unknownFieldsCodedOutput.flush();
-      } catch (java.io.IOException e) {
-      // Should not happen
-      } finally {
-        unknownFields = unknownFieldsOutput.toByteString();
-      }
-      makeExtensionsImmutable();
-    }
-  }
-  public static org.jetbrains.kotlin.protobuf.Parser<Annotations> PARSER =
-      new org.jetbrains.kotlin.protobuf.AbstractParser<Annotations>() {
-    public Annotations parsePartialFrom(
-        org.jetbrains.kotlin.protobuf.CodedInputStream input,
-        org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException {
-      return new Annotations(input, extensionRegistry);
-    }
-  };
-
-  @java.lang.Override
-  public org.jetbrains.kotlin.protobuf.Parser<Annotations> getParserForType() {
-    return PARSER;
-  }
-
-  public static final int ANNOTATION_FIELD_NUMBER = 1;
-  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
-    return annotation_;
-  }
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
-      getAnnotationOrBuilderList() {
-    return annotation_;
-  }
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  public int getAnnotationCount() {
-    return annotation_.size();
-  }
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
-    return annotation_.get(index);
-  }
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
-      int index) {
-    return annotation_.get(index);
-  }
-
-  private void initFields() {
-    annotation_ = java.util.Collections.emptyList();
-  }
-  private byte memoizedIsInitialized = -1;
-  public final boolean isInitialized() {
-    byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
-
-    for (int i = 0; i < getAnnotationCount(); i++) {
-      if (!getAnnotation(i).isInitialized()) {
-        memoizedIsInitialized = 0;
-        return false;
-      }
-    }
-    memoizedIsInitialized = 1;
-    return true;
-  }
-
-  public void writeTo(org.jetbrains.kotlin.protobuf.CodedOutputStream output)
-                      throws java.io.IOException {
-    getSerializedSize();
-    for (int i = 0; i < annotation_.size(); i++) {
-      output.writeMessage(1, annotation_.get(i));
-    }
-    output.writeRawBytes(unknownFields);
-  }
-
-  private int memoizedSerializedSize = -1;
-  public int getSerializedSize() {
-    int size = memoizedSerializedSize;
-    if (size != -1) return size;
-
-    size = 0;
-    for (int i = 0; i < annotation_.size(); i++) {
-      size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(1, annotation_.get(i));
-    }
-    size += unknownFields.size();
-    memoizedSerializedSize = size;
-    return size;
-  }
-
-  private static final long serialVersionUID = 0L;
-  @java.lang.Override
-  protected java.lang.Object writeReplace()
-      throws java.io.ObjectStreamException {
-    return super.writeReplace();
-  }
-
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(
-      org.jetbrains.kotlin.protobuf.ByteString data)
-      throws org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(
-      org.jetbrains.kotlin.protobuf.ByteString data,
-      org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(byte[] data)
-      throws org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(
-      byte[] data,
-      org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException {
-    return PARSER.parseFrom(data, extensionRegistry);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(java.io.InputStream input)
-      throws java.io.IOException {
-    return PARSER.parseFrom(input);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(
-      java.io.InputStream input,
-      org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return PARSER.parseFrom(input, extensionRegistry);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseDelimitedFrom(java.io.InputStream input)
-      throws java.io.IOException {
-    return PARSER.parseDelimitedFrom(input);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseDelimitedFrom(
-      java.io.InputStream input,
-      org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return PARSER.parseDelimitedFrom(input, extensionRegistry);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(
-      org.jetbrains.kotlin.protobuf.CodedInputStream input)
-      throws java.io.IOException {
-    return PARSER.parseFrom(input);
-  }
-  public static org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parseFrom(
-      org.jetbrains.kotlin.protobuf.CodedInputStream input,
-      org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-      throws java.io.IOException {
-    return PARSER.parseFrom(input, extensionRegistry);
-  }
-
-  public static Builder newBuilder() { return Builder.create(); }
-  public Builder newBuilderForType() { return newBuilder(); }
-  public static Builder newBuilder(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations prototype) {
-    return newBuilder().mergeFrom(prototype);
-  }
-  public Builder toBuilder() { return newBuilder(this); }
-
-  /**
-   * Protobuf type {@code org.jetbrains.kotlin.backend.common.serialization.proto.Annotations}
-   */
-  public static final class Builder extends
-      org.jetbrains.kotlin.protobuf.GeneratedMessageLite.Builder<
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations, Builder>
-      implements
-      // @@protoc_insertion_point(builder_implements:org.jetbrains.kotlin.backend.common.serialization.proto.Annotations)
-      org.jetbrains.kotlin.backend.common.serialization.proto.AnnotationsOrBuilder {
-    // Construct using org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder()
-    private Builder() {
-      maybeForceBuilderInitialization();
-    }
-
-    private void maybeForceBuilderInitialization() {
-    }
-    private static Builder create() {
-      return new Builder();
-    }
-
-    public Builder clear() {
-      super.clear();
-      annotation_ = java.util.Collections.emptyList();
-      bitField0_ = (bitField0_ & ~0x00000001);
-      return this;
-    }
-
-    public Builder clone() {
-      return create().mergeFrom(buildPartial());
-    }
-
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getDefaultInstanceForType() {
-      return org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
-    }
-
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations build() {
-      org.jetbrains.kotlin.backend.common.serialization.proto.Annotations result = buildPartial();
-      if (!result.isInitialized()) {
-        throw newUninitializedMessageException(result);
-      }
-      return result;
-    }
-
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations buildPartial() {
-      org.jetbrains.kotlin.backend.common.serialization.proto.Annotations result = new org.jetbrains.kotlin.backend.common.serialization.proto.Annotations(this);
-      int from_bitField0_ = bitField0_;
-      if (((bitField0_ & 0x00000001) == 0x00000001)) {
-        annotation_ = java.util.Collections.unmodifiableList(annotation_);
-        bitField0_ = (bitField0_ & ~0x00000001);
-      }
-      result.annotation_ = annotation_;
-      return result;
-    }
-
-    public Builder mergeFrom(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations other) {
-      if (other == org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) return this;
-      if (!other.annotation_.isEmpty()) {
-        if (annotation_.isEmpty()) {
-          annotation_ = other.annotation_;
-          bitField0_ = (bitField0_ & ~0x00000001);
-        } else {
-          ensureAnnotationIsMutable();
-          annotation_.addAll(other.annotation_);
-        }
-        
-      }
-      setUnknownFields(
-          getUnknownFields().concat(other.unknownFields));
-      return this;
-    }
-
-    public final boolean isInitialized() {
-      for (int i = 0; i < getAnnotationCount(); i++) {
-        if (!getAnnotation(i).isInitialized()) {
-          
-          return false;
-        }
-      }
-      return true;
-    }
-
-    public Builder mergeFrom(
-        org.jetbrains.kotlin.protobuf.CodedInputStream input,
-        org.jetbrains.kotlin.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws java.io.IOException {
-      org.jetbrains.kotlin.backend.common.serialization.proto.Annotations parsedMessage = null;
-      try {
-        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
-      } catch (org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException e) {
-        parsedMessage = (org.jetbrains.kotlin.backend.common.serialization.proto.Annotations) e.getUnfinishedMessage();
-        throw e;
-      } finally {
-        if (parsedMessage != null) {
-          mergeFrom(parsedMessage);
-        }
-      }
-      return this;
-    }
-    private int bitField0_;
-
-    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
-      java.util.Collections.emptyList();
-    private void ensureAnnotationIsMutable() {
-      if (!((bitField0_ & 0x00000001) == 0x00000001)) {
-        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
-        bitField0_ |= 0x00000001;
-       }
-    }
-
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
-      return java.util.Collections.unmodifiableList(annotation_);
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public int getAnnotationCount() {
-      return annotation_.size();
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
-      return annotation_.get(index);
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder setAnnotation(
-        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
-      if (value == null) {
-        throw new NullPointerException();
-      }
-      ensureAnnotationIsMutable();
-      annotation_.set(index, value);
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder setAnnotation(
-        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
-      ensureAnnotationIsMutable();
-      annotation_.set(index, builderForValue.build());
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
-      if (value == null) {
-        throw new NullPointerException();
-      }
-      ensureAnnotationIsMutable();
-      annotation_.add(value);
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder addAnnotation(
-        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
-      if (value == null) {
-        throw new NullPointerException();
-      }
-      ensureAnnotationIsMutable();
-      annotation_.add(index, value);
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder addAnnotation(
-        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
-      ensureAnnotationIsMutable();
-      annotation_.add(builderForValue.build());
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder addAnnotation(
-        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
-      ensureAnnotationIsMutable();
-      annotation_.add(index, builderForValue.build());
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder addAllAnnotation(
-        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
-      ensureAnnotationIsMutable();
-      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
-          values, annotation_);
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder clearAnnotation() {
-      annotation_ = java.util.Collections.emptyList();
-      bitField0_ = (bitField0_ & ~0x00000001);
-
-      return this;
-    }
-    /**
-     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-     */
-    public Builder removeAnnotation(int index) {
-      ensureAnnotationIsMutable();
-      annotation_.remove(index);
-
-      return this;
-    }
-
-    // @@protoc_insertion_point(builder_scope:org.jetbrains.kotlin.backend.common.serialization.proto.Annotations)
-  }
-
-  static {
-    defaultInstance = new Annotations(true);
-    defaultInstance.initFields();
-  }
-
-  // @@protoc_insertion_point(class_scope:org.jetbrains.kotlin.backend.common.serialization.proto.Annotations)
-}
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/AnnotationsOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/AnnotationsOrBuilder.java
deleted file mode 100644
index 5eba3bbc885..00000000000
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/AnnotationsOrBuilder.java
+++ /dev/null
@@ -1,23 +0,0 @@
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: compiler/ir/serialization.common/src/KotlinIr.proto
-
-package org.jetbrains.kotlin.backend.common.serialization.proto;
-
-public interface AnnotationsOrBuilder extends
-    // @@protoc_insertion_point(interface_extends:org.jetbrains.kotlin.backend.common.serialization.proto.Annotations)
-    org.jetbrains.kotlin.protobuf.MessageLiteOrBuilder {
-
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
-      getAnnotationList();
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
-  /**
-   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
-   */
-  int getAnnotationCount();
-}
\ No newline at end of file
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBase.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBase.java
index ca3f2279e71..0d52b32db28 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBase.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBase.java
@@ -85,16 +85,11 @@ public final class IrDeclarationBase extends
             break;
           }
           case 34: {
-            org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000008) == 0x00000008)) {
-              subBuilder = annotations_.toBuilder();
+            if (!((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
+              mutable_bitField0_ |= 0x00000008;
             }
-            annotations_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.PARSER, extensionRegistry);
-            if (subBuilder != null) {
-              subBuilder.mergeFrom(annotations_);
-              annotations_ = subBuilder.buildPartial();
-            }
-            bitField0_ |= 0x00000008;
+            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
             break;
           }
         }
@@ -105,6 +100,9 @@ public final class IrDeclarationBase extends
       throw new org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException(
           e.getMessage()).setUnfinishedMessage(this);
     } finally {
+      if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+      }
       try {
         unknownFieldsCodedOutput.flush();
       } catch (java.io.IOException e) {
@@ -176,26 +174,46 @@ public final class IrDeclarationBase extends
     return coordinates_;
   }
 
-  public static final int ANNOTATIONS_FIELD_NUMBER = 4;
-  private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_;
+  public static final int ANNOTATION_FIELD_NUMBER = 4;
+  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  public boolean hasAnnotations() {
-    return ((bitField0_ & 0x00000008) == 0x00000008);
+  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+    return annotation_;
   }
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-    return annotations_;
+  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
+      getAnnotationOrBuilderList() {
+    return annotation_;
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  public int getAnnotationCount() {
+    return annotation_.size();
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+    return annotation_.get(index);
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
+      int index) {
+    return annotation_.get(index);
   }
 
   private void initFields() {
     symbol_ = 0;
     origin_ = org.jetbrains.kotlin.backend.common.serialization.proto.IrDeclarationOrigin.getDefaultInstance();
     coordinates_ = org.jetbrains.kotlin.backend.common.serialization.proto.Coordinates.getDefaultInstance();
-    annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    annotation_ = java.util.Collections.emptyList();
   }
   private byte memoizedIsInitialized = -1;
   public final boolean isInitialized() {
@@ -215,17 +233,15 @@ public final class IrDeclarationBase extends
       memoizedIsInitialized = 0;
       return false;
     }
-    if (!hasAnnotations()) {
-      memoizedIsInitialized = 0;
-      return false;
-    }
     if (!getCoordinates().isInitialized()) {
       memoizedIsInitialized = 0;
       return false;
     }
-    if (!getAnnotations().isInitialized()) {
-      memoizedIsInitialized = 0;
-      return false;
+    for (int i = 0; i < getAnnotationCount(); i++) {
+      if (!getAnnotation(i).isInitialized()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
     }
     memoizedIsInitialized = 1;
     return true;
@@ -243,8 +259,8 @@ public final class IrDeclarationBase extends
     if (((bitField0_ & 0x00000004) == 0x00000004)) {
       output.writeMessage(3, coordinates_);
     }
-    if (((bitField0_ & 0x00000008) == 0x00000008)) {
-      output.writeMessage(4, annotations_);
+    for (int i = 0; i < annotation_.size(); i++) {
+      output.writeMessage(4, annotation_.get(i));
     }
     output.writeRawBytes(unknownFields);
   }
@@ -267,9 +283,9 @@ public final class IrDeclarationBase extends
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeMessageSize(3, coordinates_);
     }
-    if (((bitField0_ & 0x00000008) == 0x00000008)) {
+    for (int i = 0; i < annotation_.size(); i++) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(4, annotations_);
+        .computeMessageSize(4, annotation_.get(i));
     }
     size += unknownFields.size();
     memoizedSerializedSize = size;
@@ -371,7 +387,7 @@ public final class IrDeclarationBase extends
       bitField0_ = (bitField0_ & ~0x00000002);
       coordinates_ = org.jetbrains.kotlin.backend.common.serialization.proto.Coordinates.getDefaultInstance();
       bitField0_ = (bitField0_ & ~0x00000004);
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000008);
       return this;
     }
@@ -408,10 +424,11 @@ public final class IrDeclarationBase extends
         to_bitField0_ |= 0x00000004;
       }
       result.coordinates_ = coordinates_;
-      if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
-        to_bitField0_ |= 0x00000008;
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+        bitField0_ = (bitField0_ & ~0x00000008);
       }
-      result.annotations_ = annotations_;
+      result.annotation_ = annotation_;
       result.bitField0_ = to_bitField0_;
       return result;
     }
@@ -427,8 +444,15 @@ public final class IrDeclarationBase extends
       if (other.hasCoordinates()) {
         mergeCoordinates(other.getCoordinates());
       }
-      if (other.hasAnnotations()) {
-        mergeAnnotations(other.getAnnotations());
+      if (!other.annotation_.isEmpty()) {
+        if (annotation_.isEmpty()) {
+          annotation_ = other.annotation_;
+          bitField0_ = (bitField0_ & ~0x00000008);
+        } else {
+          ensureAnnotationIsMutable();
+          annotation_.addAll(other.annotation_);
+        }
+        
       }
       setUnknownFields(
           getUnknownFields().concat(other.unknownFields));
@@ -448,17 +472,15 @@ public final class IrDeclarationBase extends
         
         return false;
       }
-      if (!hasAnnotations()) {
-        
-        return false;
-      }
       if (!getCoordinates().isInitialized()) {
         
         return false;
       }
-      if (!getAnnotations().isInitialized()) {
-        
-        return false;
+      for (int i = 0; i < getAnnotationCount(); i++) {
+        if (!getAnnotation(i).isInitialized()) {
+          
+          return false;
+        }
       }
       return true;
     }
@@ -634,63 +656,128 @@ public final class IrDeclarationBase extends
       return this;
     }
 
-    private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
+      java.util.Collections.emptyList();
+    private void ensureAnnotationIsMutable() {
+      if (!((bitField0_ & 0x00000008) == 0x00000008)) {
+        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
+        bitField0_ |= 0x00000008;
+       }
+    }
+
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public boolean hasAnnotations() {
-      return ((bitField0_ & 0x00000008) == 0x00000008);
+    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+      return java.util.Collections.unmodifiableList(annotation_);
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-      return annotations_;
+    public int getAnnotationCount() {
+      return annotation_.size();
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder setAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
+    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+      return annotation_.get(index);
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
       if (value == null) {
         throw new NullPointerException();
       }
-      annotations_ = value;
+      ensureAnnotationIsMutable();
+      annotation_.set(index, value);
 
-      bitField0_ |= 0x00000008;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder setAnnotations(
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder builderForValue) {
-      annotations_ = builderForValue.build();
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.set(index, builderForValue.build());
 
-      bitField0_ |= 0x00000008;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder mergeAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
-      if (((bitField0_ & 0x00000008) == 0x00000008) &&
-          annotations_ != org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) {
-        annotations_ =
-          org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder(annotations_).mergeFrom(value).buildPartial();
-      } else {
-        annotations_ = value;
+    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
       }
+      ensureAnnotationIsMutable();
+      annotation_.add(value);
 
-      bitField0_ |= 0x00000008;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder clearAnnotations() {
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureAnnotationIsMutable();
+      annotation_.add(index, value);
 
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder addAnnotation(
+        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(index, builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder addAllAnnotation(
+        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
+      ensureAnnotationIsMutable();
+      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
+          values, annotation_);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder clearAnnotation() {
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000008);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder removeAnnotation(int index) {
+      ensureAnnotationIsMutable();
+      annotation_.remove(index);
+
       return this;
     }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBaseOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBaseOrBuilder.java
index 68ab30c06b5..06dc6f87498 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBaseOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDeclarationBaseOrBuilder.java
@@ -35,11 +35,16 @@ public interface IrDeclarationBaseOrBuilder extends
   org.jetbrains.kotlin.backend.common.serialization.proto.Coordinates getCoordinates();
 
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  boolean hasAnnotations();
+  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
+      getAnnotationList();
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations();
+  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  int getAnnotationCount();
 }
\ No newline at end of file
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicType.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicType.java
index f875c8912c9..a9fe25d435e 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicType.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicType.java
@@ -54,16 +54,11 @@ public final class IrDynamicType extends
             break;
           }
           case 10: {
-            org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000001) == 0x00000001)) {
-              subBuilder = annotations_.toBuilder();
+            if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
+              mutable_bitField0_ |= 0x00000001;
             }
-            annotations_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.PARSER, extensionRegistry);
-            if (subBuilder != null) {
-              subBuilder.mergeFrom(annotations_);
-              annotations_ = subBuilder.buildPartial();
-            }
-            bitField0_ |= 0x00000001;
+            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
             break;
           }
         }
@@ -74,6 +69,9 @@ public final class IrDynamicType extends
       throw new org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException(
           e.getMessage()).setUnfinishedMessage(this);
     } finally {
+      if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+      }
       try {
         unknownFieldsCodedOutput.flush();
       } catch (java.io.IOException e) {
@@ -99,24 +97,43 @@ public final class IrDynamicType extends
     return PARSER;
   }
 
-  private int bitField0_;
-  public static final int ANNOTATIONS_FIELD_NUMBER = 1;
-  private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_;
+  public static final int ANNOTATION_FIELD_NUMBER = 1;
+  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public boolean hasAnnotations() {
-    return ((bitField0_ & 0x00000001) == 0x00000001);
+  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+    return annotation_;
   }
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-    return annotations_;
+  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
+      getAnnotationOrBuilderList() {
+    return annotation_;
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public int getAnnotationCount() {
+    return annotation_.size();
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+    return annotation_.get(index);
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
+      int index) {
+    return annotation_.get(index);
   }
 
   private void initFields() {
-    annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    annotation_ = java.util.Collections.emptyList();
   }
   private byte memoizedIsInitialized = -1;
   public final boolean isInitialized() {
@@ -124,13 +141,11 @@ public final class IrDynamicType extends
     if (isInitialized == 1) return true;
     if (isInitialized == 0) return false;
 
-    if (!hasAnnotations()) {
-      memoizedIsInitialized = 0;
-      return false;
-    }
-    if (!getAnnotations().isInitialized()) {
-      memoizedIsInitialized = 0;
-      return false;
+    for (int i = 0; i < getAnnotationCount(); i++) {
+      if (!getAnnotation(i).isInitialized()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
     }
     memoizedIsInitialized = 1;
     return true;
@@ -139,8 +154,8 @@ public final class IrDynamicType extends
   public void writeTo(org.jetbrains.kotlin.protobuf.CodedOutputStream output)
                       throws java.io.IOException {
     getSerializedSize();
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
-      output.writeMessage(1, annotations_);
+    for (int i = 0; i < annotation_.size(); i++) {
+      output.writeMessage(1, annotation_.get(i));
     }
     output.writeRawBytes(unknownFields);
   }
@@ -151,9 +166,9 @@ public final class IrDynamicType extends
     if (size != -1) return size;
 
     size = 0;
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
+    for (int i = 0; i < annotation_.size(); i++) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(1, annotations_);
+        .computeMessageSize(1, annotation_.get(i));
     }
     size += unknownFields.size();
     memoizedSerializedSize = size;
@@ -249,7 +264,7 @@ public final class IrDynamicType extends
 
     public Builder clear() {
       super.clear();
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
       return this;
     }
@@ -273,19 +288,25 @@ public final class IrDynamicType extends
     public org.jetbrains.kotlin.backend.common.serialization.proto.IrDynamicType buildPartial() {
       org.jetbrains.kotlin.backend.common.serialization.proto.IrDynamicType result = new org.jetbrains.kotlin.backend.common.serialization.proto.IrDynamicType(this);
       int from_bitField0_ = bitField0_;
-      int to_bitField0_ = 0;
-      if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
-        to_bitField0_ |= 0x00000001;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+        bitField0_ = (bitField0_ & ~0x00000001);
       }
-      result.annotations_ = annotations_;
-      result.bitField0_ = to_bitField0_;
+      result.annotation_ = annotation_;
       return result;
     }
 
     public Builder mergeFrom(org.jetbrains.kotlin.backend.common.serialization.proto.IrDynamicType other) {
       if (other == org.jetbrains.kotlin.backend.common.serialization.proto.IrDynamicType.getDefaultInstance()) return this;
-      if (other.hasAnnotations()) {
-        mergeAnnotations(other.getAnnotations());
+      if (!other.annotation_.isEmpty()) {
+        if (annotation_.isEmpty()) {
+          annotation_ = other.annotation_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureAnnotationIsMutable();
+          annotation_.addAll(other.annotation_);
+        }
+        
       }
       setUnknownFields(
           getUnknownFields().concat(other.unknownFields));
@@ -293,13 +314,11 @@ public final class IrDynamicType extends
     }
 
     public final boolean isInitialized() {
-      if (!hasAnnotations()) {
-        
-        return false;
-      }
-      if (!getAnnotations().isInitialized()) {
-        
-        return false;
+      for (int i = 0; i < getAnnotationCount(); i++) {
+        if (!getAnnotation(i).isInitialized()) {
+          
+          return false;
+        }
       }
       return true;
     }
@@ -323,63 +342,128 @@ public final class IrDynamicType extends
     }
     private int bitField0_;
 
-    private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
+      java.util.Collections.emptyList();
+    private void ensureAnnotationIsMutable() {
+      if (!((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
+        bitField0_ |= 0x00000001;
+       }
+    }
+
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public boolean hasAnnotations() {
-      return ((bitField0_ & 0x00000001) == 0x00000001);
+    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+      return java.util.Collections.unmodifiableList(annotation_);
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-      return annotations_;
+    public int getAnnotationCount() {
+      return annotation_.size();
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
+    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+      return annotation_.get(index);
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
       if (value == null) {
         throw new NullPointerException();
       }
-      annotations_ = value;
+      ensureAnnotationIsMutable();
+      annotation_.set(index, value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder builderForValue) {
-      annotations_ = builderForValue.build();
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.set(index, builderForValue.build());
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder mergeAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
-      if (((bitField0_ & 0x00000001) == 0x00000001) &&
-          annotations_ != org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) {
-        annotations_ =
-          org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder(annotations_).mergeFrom(value).buildPartial();
-      } else {
-        annotations_ = value;
+    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
       }
+      ensureAnnotationIsMutable();
+      annotation_.add(value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder clearAnnotations() {
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureAnnotationIsMutable();
+      annotation_.add(index, value);
 
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(index, builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAllAnnotation(
+        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
+      ensureAnnotationIsMutable();
+      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
+          values, annotation_);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder clearAnnotation() {
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder removeAnnotation(int index) {
+      ensureAnnotationIsMutable();
+      annotation_.remove(index);
+
       return this;
     }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicTypeOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicTypeOrBuilder.java
index 2bfac88b7a5..e6ede17ef8c 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicTypeOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrDynamicTypeOrBuilder.java
@@ -8,11 +8,16 @@ public interface IrDynamicTypeOrBuilder extends
     org.jetbrains.kotlin.protobuf.MessageLiteOrBuilder {
 
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  boolean hasAnnotations();
+  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
+      getAnnotationList();
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations();
+  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  int getAnnotationCount();
 }
\ No newline at end of file
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorType.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorType.java
index 0f6028652f2..002e5d0ba85 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorType.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorType.java
@@ -54,16 +54,11 @@ public final class IrErrorType extends
             break;
           }
           case 10: {
-            org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000001) == 0x00000001)) {
-              subBuilder = annotations_.toBuilder();
+            if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
+              mutable_bitField0_ |= 0x00000001;
             }
-            annotations_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.PARSER, extensionRegistry);
-            if (subBuilder != null) {
-              subBuilder.mergeFrom(annotations_);
-              annotations_ = subBuilder.buildPartial();
-            }
-            bitField0_ |= 0x00000001;
+            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
             break;
           }
         }
@@ -74,6 +69,9 @@ public final class IrErrorType extends
       throw new org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException(
           e.getMessage()).setUnfinishedMessage(this);
     } finally {
+      if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+      }
       try {
         unknownFieldsCodedOutput.flush();
       } catch (java.io.IOException e) {
@@ -99,24 +97,43 @@ public final class IrErrorType extends
     return PARSER;
   }
 
-  private int bitField0_;
-  public static final int ANNOTATIONS_FIELD_NUMBER = 1;
-  private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_;
+  public static final int ANNOTATION_FIELD_NUMBER = 1;
+  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public boolean hasAnnotations() {
-    return ((bitField0_ & 0x00000001) == 0x00000001);
+  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+    return annotation_;
   }
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-    return annotations_;
+  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
+      getAnnotationOrBuilderList() {
+    return annotation_;
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public int getAnnotationCount() {
+    return annotation_.size();
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+    return annotation_.get(index);
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
+      int index) {
+    return annotation_.get(index);
   }
 
   private void initFields() {
-    annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    annotation_ = java.util.Collections.emptyList();
   }
   private byte memoizedIsInitialized = -1;
   public final boolean isInitialized() {
@@ -124,13 +141,11 @@ public final class IrErrorType extends
     if (isInitialized == 1) return true;
     if (isInitialized == 0) return false;
 
-    if (!hasAnnotations()) {
-      memoizedIsInitialized = 0;
-      return false;
-    }
-    if (!getAnnotations().isInitialized()) {
-      memoizedIsInitialized = 0;
-      return false;
+    for (int i = 0; i < getAnnotationCount(); i++) {
+      if (!getAnnotation(i).isInitialized()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
     }
     memoizedIsInitialized = 1;
     return true;
@@ -139,8 +154,8 @@ public final class IrErrorType extends
   public void writeTo(org.jetbrains.kotlin.protobuf.CodedOutputStream output)
                       throws java.io.IOException {
     getSerializedSize();
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
-      output.writeMessage(1, annotations_);
+    for (int i = 0; i < annotation_.size(); i++) {
+      output.writeMessage(1, annotation_.get(i));
     }
     output.writeRawBytes(unknownFields);
   }
@@ -151,9 +166,9 @@ public final class IrErrorType extends
     if (size != -1) return size;
 
     size = 0;
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
+    for (int i = 0; i < annotation_.size(); i++) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(1, annotations_);
+        .computeMessageSize(1, annotation_.get(i));
     }
     size += unknownFields.size();
     memoizedSerializedSize = size;
@@ -249,7 +264,7 @@ public final class IrErrorType extends
 
     public Builder clear() {
       super.clear();
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
       return this;
     }
@@ -273,19 +288,25 @@ public final class IrErrorType extends
     public org.jetbrains.kotlin.backend.common.serialization.proto.IrErrorType buildPartial() {
       org.jetbrains.kotlin.backend.common.serialization.proto.IrErrorType result = new org.jetbrains.kotlin.backend.common.serialization.proto.IrErrorType(this);
       int from_bitField0_ = bitField0_;
-      int to_bitField0_ = 0;
-      if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
-        to_bitField0_ |= 0x00000001;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+        bitField0_ = (bitField0_ & ~0x00000001);
       }
-      result.annotations_ = annotations_;
-      result.bitField0_ = to_bitField0_;
+      result.annotation_ = annotation_;
       return result;
     }
 
     public Builder mergeFrom(org.jetbrains.kotlin.backend.common.serialization.proto.IrErrorType other) {
       if (other == org.jetbrains.kotlin.backend.common.serialization.proto.IrErrorType.getDefaultInstance()) return this;
-      if (other.hasAnnotations()) {
-        mergeAnnotations(other.getAnnotations());
+      if (!other.annotation_.isEmpty()) {
+        if (annotation_.isEmpty()) {
+          annotation_ = other.annotation_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureAnnotationIsMutable();
+          annotation_.addAll(other.annotation_);
+        }
+        
       }
       setUnknownFields(
           getUnknownFields().concat(other.unknownFields));
@@ -293,13 +314,11 @@ public final class IrErrorType extends
     }
 
     public final boolean isInitialized() {
-      if (!hasAnnotations()) {
-        
-        return false;
-      }
-      if (!getAnnotations().isInitialized()) {
-        
-        return false;
+      for (int i = 0; i < getAnnotationCount(); i++) {
+        if (!getAnnotation(i).isInitialized()) {
+          
+          return false;
+        }
       }
       return true;
     }
@@ -323,63 +342,128 @@ public final class IrErrorType extends
     }
     private int bitField0_;
 
-    private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
+      java.util.Collections.emptyList();
+    private void ensureAnnotationIsMutable() {
+      if (!((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
+        bitField0_ |= 0x00000001;
+       }
+    }
+
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public boolean hasAnnotations() {
-      return ((bitField0_ & 0x00000001) == 0x00000001);
+    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+      return java.util.Collections.unmodifiableList(annotation_);
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-      return annotations_;
+    public int getAnnotationCount() {
+      return annotation_.size();
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
+    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+      return annotation_.get(index);
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
       if (value == null) {
         throw new NullPointerException();
       }
-      annotations_ = value;
+      ensureAnnotationIsMutable();
+      annotation_.set(index, value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder builderForValue) {
-      annotations_ = builderForValue.build();
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.set(index, builderForValue.build());
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder mergeAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
-      if (((bitField0_ & 0x00000001) == 0x00000001) &&
-          annotations_ != org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) {
-        annotations_ =
-          org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder(annotations_).mergeFrom(value).buildPartial();
-      } else {
-        annotations_ = value;
+    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
       }
+      ensureAnnotationIsMutable();
+      annotation_.add(value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder clearAnnotations() {
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureAnnotationIsMutable();
+      annotation_.add(index, value);
 
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(index, builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAllAnnotation(
+        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
+      ensureAnnotationIsMutable();
+      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
+          values, annotation_);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder clearAnnotation() {
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder removeAnnotation(int index) {
+      ensureAnnotationIsMutable();
+      annotation_.remove(index);
+
       return this;
     }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorTypeOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorTypeOrBuilder.java
index cb0072cca95..dfedfc350e5 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorTypeOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrErrorTypeOrBuilder.java
@@ -8,11 +8,16 @@ public interface IrErrorTypeOrBuilder extends
     org.jetbrains.kotlin.protobuf.MessageLiteOrBuilder {
 
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  boolean hasAnnotations();
+  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
+      getAnnotationList();
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations();
+  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  int getAnnotationCount();
 }
\ No newline at end of file
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFile.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFile.java
index 8e4f7ae6d96..2be23b1d9ae 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFile.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFile.java
@@ -53,12 +53,25 @@ public final class IrFile extends
             }
             break;
           }
-          case 10: {
+          case 8: {
             if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
-              declarationId_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.UniqId>();
+              declarationId_ = new java.util.ArrayList<java.lang.Long>();
               mutable_bitField0_ |= 0x00000001;
             }
-            declarationId_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.UniqId.PARSER, extensionRegistry));
+            declarationId_.add(input.readInt64());
+            break;
+          }
+          case 10: {
+            int length = input.readRawVarint32();
+            int limit = input.pushLimit(length);
+            if (!((mutable_bitField0_ & 0x00000001) == 0x00000001) && input.getBytesUntilLimit() > 0) {
+              declarationId_ = new java.util.ArrayList<java.lang.Long>();
+              mutable_bitField0_ |= 0x00000001;
+            }
+            while (input.getBytesUntilLimit() > 0) {
+              declarationId_.add(input.readInt64());
+            }
+            input.popLimit(limit);
             break;
           }
           case 18: {
@@ -96,16 +109,11 @@ public final class IrFile extends
             break;
           }
           case 34: {
-            org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000002) == 0x00000002)) {
-              subBuilder = annotations_.toBuilder();
+            if (!((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
+              mutable_bitField0_ |= 0x00000008;
             }
-            annotations_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.PARSER, extensionRegistry);
-            if (subBuilder != null) {
-              subBuilder.mergeFrom(annotations_);
-              annotations_ = subBuilder.buildPartial();
-            }
-            bitField0_ |= 0x00000002;
+            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
             break;
           }
           case 40: {
@@ -143,6 +151,9 @@ public final class IrFile extends
       if (((mutable_bitField0_ & 0x00000004) == 0x00000004)) {
         fqName_ = java.util.Collections.unmodifiableList(fqName_);
       }
+      if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+      }
       if (((mutable_bitField0_ & 0x00000010) == 0x00000010)) {
         explicitlyExportedToCompiler_ = java.util.Collections.unmodifiableList(explicitlyExportedToCompiler_);
       }
@@ -244,27 +255,39 @@ public final class IrFile extends
     return fqName_.get(index);
   }
 
-  public static final int ANNOTATIONS_FIELD_NUMBER = 4;
-  private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_;
+  public static final int ANNOTATION_FIELD_NUMBER = 4;
+  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-   *
-   * <pre>
-   *  required FqName fq_name = 3;
-   * </pre>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  public boolean hasAnnotations() {
-    return ((bitField0_ & 0x00000002) == 0x00000002);
+  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+    return annotation_;
   }
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-   *
-   * <pre>
-   *  required FqName fq_name = 3;
-   * </pre>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-    return annotations_;
+  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
+      getAnnotationOrBuilderList() {
+    return annotation_;
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  public int getAnnotationCount() {
+    return annotation_.size();
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+    return annotation_.get(index);
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
+      int index) {
+    return annotation_.get(index);
   }
 
   public static final int EXPLICITLY_EXPORTED_TO_COMPILER_FIELD_NUMBER = 5;
@@ -293,7 +316,7 @@ public final class IrFile extends
     declarationId_ = java.util.Collections.emptyList();
     fileEntry_ = org.jetbrains.kotlin.backend.common.serialization.proto.FileEntry.getDefaultInstance();
     fqName_ = java.util.Collections.emptyList();
-    annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    annotation_ = java.util.Collections.emptyList();
     explicitlyExportedToCompiler_ = java.util.Collections.emptyList();
   }
   private byte memoizedIsInitialized = -1;
@@ -306,23 +329,15 @@ public final class IrFile extends
       memoizedIsInitialized = 0;
       return false;
     }
-    if (!hasAnnotations()) {
-      memoizedIsInitialized = 0;
-      return false;
-    }
-    for (int i = 0; i < getDeclarationIdCount(); i++) {
-      if (!getDeclarationId(i).isInitialized()) {
-        memoizedIsInitialized = 0;
-        return false;
-      }
-    }
     if (!getFileEntry().isInitialized()) {
       memoizedIsInitialized = 0;
       return false;
     }
-    if (!getAnnotations().isInitialized()) {
-      memoizedIsInitialized = 0;
-      return false;
+    for (int i = 0; i < getAnnotationCount(); i++) {
+      if (!getAnnotation(i).isInitialized()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
     }
     memoizedIsInitialized = 1;
     return true;
@@ -332,7 +347,7 @@ public final class IrFile extends
                       throws java.io.IOException {
     getSerializedSize();
     for (int i = 0; i < declarationId_.size(); i++) {
-      output.writeMessage(1, declarationId_.get(i));
+      output.writeInt64(1, declarationId_.get(i));
     }
     if (((bitField0_ & 0x00000001) == 0x00000001)) {
       output.writeMessage(2, fileEntry_);
@@ -340,8 +355,8 @@ public final class IrFile extends
     for (int i = 0; i < fqName_.size(); i++) {
       output.writeInt32(3, fqName_.get(i));
     }
-    if (((bitField0_ & 0x00000002) == 0x00000002)) {
-      output.writeMessage(4, annotations_);
+    for (int i = 0; i < annotation_.size(); i++) {
+      output.writeMessage(4, annotation_.get(i));
     }
     for (int i = 0; i < explicitlyExportedToCompiler_.size(); i++) {
       output.writeInt32(5, explicitlyExportedToCompiler_.get(i));
@@ -355,9 +370,14 @@ public final class IrFile extends
     if (size != -1) return size;
 
     size = 0;
-    for (int i = 0; i < declarationId_.size(); i++) {
-      size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(1, declarationId_.get(i));
+    {
+      int dataSize = 0;
+      for (int i = 0; i < declarationId_.size(); i++) {
+        dataSize += org.jetbrains.kotlin.protobuf.CodedOutputStream
+          .computeInt64SizeNoTag(declarationId_.get(i));
+      }
+      size += dataSize;
+      size += 1 * getDeclarationIdList().size();
     }
     if (((bitField0_ & 0x00000001) == 0x00000001)) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
@@ -372,9 +392,9 @@ public final class IrFile extends
       size += dataSize;
       size += 1 * getFqNameList().size();
     }
-    if (((bitField0_ & 0x00000002) == 0x00000002)) {
+    for (int i = 0; i < annotation_.size(); i++) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(4, annotations_);
+        .computeMessageSize(4, annotation_.get(i));
     }
     {
       int dataSize = 0;
@@ -485,7 +505,7 @@ public final class IrFile extends
       bitField0_ = (bitField0_ & ~0x00000002);
       fqName_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000004);
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000008);
       explicitlyExportedToCompiler_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000010);
@@ -526,10 +546,11 @@ public final class IrFile extends
         bitField0_ = (bitField0_ & ~0x00000004);
       }
       result.fqName_ = fqName_;
-      if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
-        to_bitField0_ |= 0x00000002;
+      if (((bitField0_ & 0x00000008) == 0x00000008)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+        bitField0_ = (bitField0_ & ~0x00000008);
       }
-      result.annotations_ = annotations_;
+      result.annotation_ = annotation_;
       if (((bitField0_ & 0x00000010) == 0x00000010)) {
         explicitlyExportedToCompiler_ = java.util.Collections.unmodifiableList(explicitlyExportedToCompiler_);
         bitField0_ = (bitField0_ & ~0x00000010);
@@ -564,8 +585,15 @@ public final class IrFile extends
         }
         
       }
-      if (other.hasAnnotations()) {
-        mergeAnnotations(other.getAnnotations());
+      if (!other.annotation_.isEmpty()) {
+        if (annotation_.isEmpty()) {
+          annotation_ = other.annotation_;
+          bitField0_ = (bitField0_ & ~0x00000008);
+        } else {
+          ensureAnnotationIsMutable();
+          annotation_.addAll(other.annotation_);
+        }
+        
       }
       if (!other.explicitlyExportedToCompiler_.isEmpty()) {
         if (explicitlyExportedToCompiler_.isEmpty()) {
@@ -587,23 +615,15 @@ public final class IrFile extends
         
         return false;
       }
-      if (!hasAnnotations()) {
-        
-        return false;
-      }
-      for (int i = 0; i < getDeclarationIdCount(); i++) {
-        if (!getDeclarationId(i).isInitialized()) {
-          
-          return false;
-        }
-      }
       if (!getFileEntry().isInitialized()) {
         
         return false;
       }
-      if (!getAnnotations().isInitialized()) {
-        
-        return false;
+      for (int i = 0; i < getAnnotationCount(); i++) {
+        if (!getAnnotation(i).isInitialized()) {
+          
+          return false;
+        }
       }
       return true;
     }
@@ -878,87 +898,128 @@ public final class IrFile extends
       return this;
     }
 
-    private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
+      java.util.Collections.emptyList();
+    private void ensureAnnotationIsMutable() {
+      if (!((bitField0_ & 0x00000008) == 0x00000008)) {
+        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
+        bitField0_ |= 0x00000008;
+       }
+    }
+
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-     *
-     * <pre>
-     *  required FqName fq_name = 3;
-     * </pre>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public boolean hasAnnotations() {
-      return ((bitField0_ & 0x00000008) == 0x00000008);
+    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+      return java.util.Collections.unmodifiableList(annotation_);
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-     *
-     * <pre>
-     *  required FqName fq_name = 3;
-     * </pre>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-      return annotations_;
+    public int getAnnotationCount() {
+      return annotation_.size();
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-     *
-     * <pre>
-     *  required FqName fq_name = 3;
-     * </pre>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder setAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
+    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+      return annotation_.get(index);
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
       if (value == null) {
         throw new NullPointerException();
       }
-      annotations_ = value;
+      ensureAnnotationIsMutable();
+      annotation_.set(index, value);
 
-      bitField0_ |= 0x00000008;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-     *
-     * <pre>
-     *  required FqName fq_name = 3;
-     * </pre>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder setAnnotations(
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder builderForValue) {
-      annotations_ = builderForValue.build();
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.set(index, builderForValue.build());
 
-      bitField0_ |= 0x00000008;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-     *
-     * <pre>
-     *  required FqName fq_name = 3;
-     * </pre>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder mergeAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
-      if (((bitField0_ & 0x00000008) == 0x00000008) &&
-          annotations_ != org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) {
-        annotations_ =
-          org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder(annotations_).mergeFrom(value).buildPartial();
-      } else {
-        annotations_ = value;
+    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
       }
+      ensureAnnotationIsMutable();
+      annotation_.add(value);
 
-      bitField0_ |= 0x00000008;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-     *
-     * <pre>
-     *  required FqName fq_name = 3;
-     * </pre>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
      */
-    public Builder clearAnnotations() {
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureAnnotationIsMutable();
+      annotation_.add(index, value);
 
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder addAnnotation(
+        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(index, builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder addAllAnnotation(
+        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
+      ensureAnnotationIsMutable();
+      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
+          values, annotation_);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder clearAnnotation() {
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000008);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+     */
+    public Builder removeAnnotation(int index) {
+      ensureAnnotationIsMutable();
+      annotation_.remove(index);
+
       return this;
     }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFileOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFileOrBuilder.java
index 3a4759b91de..d6a538629aa 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFileOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrFileOrBuilder.java
@@ -44,21 +44,18 @@ public interface IrFileOrBuilder extends
   int getFqName(int index);
 
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-   *
-   * <pre>
-   *  required FqName fq_name = 3;
-   * </pre>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  boolean hasAnnotations();
+  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
+      getAnnotationList();
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 4;</code>
-   *
-   * <pre>
-   *  required FqName fq_name = 3;
-   * </pre>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
    */
-  org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations();
+  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 4;</code>
+   */
+  int getAnnotationCount();
 
   /**
    * <code>repeated int32 explicitly_exported_to_compiler = 5;</code>
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleType.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleType.java
index bc06aff80df..4036c5100e8 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleType.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleType.java
@@ -54,25 +54,20 @@ public final class IrSimpleType extends
             break;
           }
           case 10: {
-            org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000001) == 0x00000001)) {
-              subBuilder = annotations_.toBuilder();
+            if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
+              mutable_bitField0_ |= 0x00000001;
             }
-            annotations_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.PARSER, extensionRegistry);
-            if (subBuilder != null) {
-              subBuilder.mergeFrom(annotations_);
-              annotations_ = subBuilder.buildPartial();
-            }
-            bitField0_ |= 0x00000001;
+            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
             break;
           }
           case 16: {
-            bitField0_ |= 0x00000002;
+            bitField0_ |= 0x00000001;
             classifier_ = input.readInt32();
             break;
           }
           case 24: {
-            bitField0_ |= 0x00000004;
+            bitField0_ |= 0x00000002;
             hasQuestionMark_ = input.readBool();
             break;
           }
@@ -86,7 +81,7 @@ public final class IrSimpleType extends
           }
           case 42: {
             org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000008) == 0x00000008)) {
+            if (((bitField0_ & 0x00000004) == 0x00000004)) {
               subBuilder = abbreviation_.toBuilder();
             }
             abbreviation_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation.PARSER, extensionRegistry);
@@ -94,7 +89,7 @@ public final class IrSimpleType extends
               subBuilder.mergeFrom(abbreviation_);
               abbreviation_ = subBuilder.buildPartial();
             }
-            bitField0_ |= 0x00000008;
+            bitField0_ |= 0x00000004;
             break;
           }
         }
@@ -105,6 +100,9 @@ public final class IrSimpleType extends
       throw new org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException(
           e.getMessage()).setUnfinishedMessage(this);
     } finally {
+      if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+      }
       if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
         argument_ = java.util.Collections.unmodifiableList(argument_);
       }
@@ -134,19 +132,39 @@ public final class IrSimpleType extends
   }
 
   private int bitField0_;
-  public static final int ANNOTATIONS_FIELD_NUMBER = 1;
-  private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_;
+  public static final int ANNOTATION_FIELD_NUMBER = 1;
+  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public boolean hasAnnotations() {
-    return ((bitField0_ & 0x00000001) == 0x00000001);
+  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+    return annotation_;
   }
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-    return annotations_;
+  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
+      getAnnotationOrBuilderList() {
+    return annotation_;
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public int getAnnotationCount() {
+    return annotation_.size();
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+    return annotation_.get(index);
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
+      int index) {
+    return annotation_.get(index);
   }
 
   public static final int CLASSIFIER_FIELD_NUMBER = 2;
@@ -155,7 +173,7 @@ public final class IrSimpleType extends
    * <code>required int32 classifier = 2;</code>
    */
   public boolean hasClassifier() {
-    return ((bitField0_ & 0x00000002) == 0x00000002);
+    return ((bitField0_ & 0x00000001) == 0x00000001);
   }
   /**
    * <code>required int32 classifier = 2;</code>
@@ -170,7 +188,7 @@ public final class IrSimpleType extends
    * <code>required bool has_question_mark = 3;</code>
    */
   public boolean hasHasQuestionMark() {
-    return ((bitField0_ & 0x00000004) == 0x00000004);
+    return ((bitField0_ & 0x00000002) == 0x00000002);
   }
   /**
    * <code>required bool has_question_mark = 3;</code>
@@ -220,7 +238,7 @@ public final class IrSimpleType extends
    * <code>optional .org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation abbreviation = 5;</code>
    */
   public boolean hasAbbreviation() {
-    return ((bitField0_ & 0x00000008) == 0x00000008);
+    return ((bitField0_ & 0x00000004) == 0x00000004);
   }
   /**
    * <code>optional .org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation abbreviation = 5;</code>
@@ -230,7 +248,7 @@ public final class IrSimpleType extends
   }
 
   private void initFields() {
-    annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    annotation_ = java.util.Collections.emptyList();
     classifier_ = 0;
     hasQuestionMark_ = false;
     argument_ = java.util.Collections.emptyList();
@@ -242,10 +260,6 @@ public final class IrSimpleType extends
     if (isInitialized == 1) return true;
     if (isInitialized == 0) return false;
 
-    if (!hasAnnotations()) {
-      memoizedIsInitialized = 0;
-      return false;
-    }
     if (!hasClassifier()) {
       memoizedIsInitialized = 0;
       return false;
@@ -254,9 +268,11 @@ public final class IrSimpleType extends
       memoizedIsInitialized = 0;
       return false;
     }
-    if (!getAnnotations().isInitialized()) {
-      memoizedIsInitialized = 0;
-      return false;
+    for (int i = 0; i < getAnnotationCount(); i++) {
+      if (!getAnnotation(i).isInitialized()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
     }
     for (int i = 0; i < getArgumentCount(); i++) {
       if (!getArgument(i).isInitialized()) {
@@ -277,19 +293,19 @@ public final class IrSimpleType extends
   public void writeTo(org.jetbrains.kotlin.protobuf.CodedOutputStream output)
                       throws java.io.IOException {
     getSerializedSize();
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
-      output.writeMessage(1, annotations_);
+    for (int i = 0; i < annotation_.size(); i++) {
+      output.writeMessage(1, annotation_.get(i));
     }
-    if (((bitField0_ & 0x00000002) == 0x00000002)) {
+    if (((bitField0_ & 0x00000001) == 0x00000001)) {
       output.writeInt32(2, classifier_);
     }
-    if (((bitField0_ & 0x00000004) == 0x00000004)) {
+    if (((bitField0_ & 0x00000002) == 0x00000002)) {
       output.writeBool(3, hasQuestionMark_);
     }
     for (int i = 0; i < argument_.size(); i++) {
       output.writeMessage(4, argument_.get(i));
     }
-    if (((bitField0_ & 0x00000008) == 0x00000008)) {
+    if (((bitField0_ & 0x00000004) == 0x00000004)) {
       output.writeMessage(5, abbreviation_);
     }
     output.writeRawBytes(unknownFields);
@@ -301,15 +317,15 @@ public final class IrSimpleType extends
     if (size != -1) return size;
 
     size = 0;
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
+    for (int i = 0; i < annotation_.size(); i++) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(1, annotations_);
+        .computeMessageSize(1, annotation_.get(i));
     }
-    if (((bitField0_ & 0x00000002) == 0x00000002)) {
+    if (((bitField0_ & 0x00000001) == 0x00000001)) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeInt32Size(2, classifier_);
     }
-    if (((bitField0_ & 0x00000004) == 0x00000004)) {
+    if (((bitField0_ & 0x00000002) == 0x00000002)) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeBoolSize(3, hasQuestionMark_);
     }
@@ -317,7 +333,7 @@ public final class IrSimpleType extends
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeMessageSize(4, argument_.get(i));
     }
-    if (((bitField0_ & 0x00000008) == 0x00000008)) {
+    if (((bitField0_ & 0x00000004) == 0x00000004)) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeMessageSize(5, abbreviation_);
     }
@@ -415,7 +431,7 @@ public final class IrSimpleType extends
 
     public Builder clear() {
       super.clear();
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
       classifier_ = 0;
       bitField0_ = (bitField0_ & ~0x00000002);
@@ -448,16 +464,17 @@ public final class IrSimpleType extends
       org.jetbrains.kotlin.backend.common.serialization.proto.IrSimpleType result = new org.jetbrains.kotlin.backend.common.serialization.proto.IrSimpleType(this);
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
-      if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
-        to_bitField0_ |= 0x00000001;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+        bitField0_ = (bitField0_ & ~0x00000001);
       }
-      result.annotations_ = annotations_;
+      result.annotation_ = annotation_;
       if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
-        to_bitField0_ |= 0x00000002;
+        to_bitField0_ |= 0x00000001;
       }
       result.classifier_ = classifier_;
       if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
-        to_bitField0_ |= 0x00000004;
+        to_bitField0_ |= 0x00000002;
       }
       result.hasQuestionMark_ = hasQuestionMark_;
       if (((bitField0_ & 0x00000008) == 0x00000008)) {
@@ -466,7 +483,7 @@ public final class IrSimpleType extends
       }
       result.argument_ = argument_;
       if (((from_bitField0_ & 0x00000010) == 0x00000010)) {
-        to_bitField0_ |= 0x00000008;
+        to_bitField0_ |= 0x00000004;
       }
       result.abbreviation_ = abbreviation_;
       result.bitField0_ = to_bitField0_;
@@ -475,8 +492,15 @@ public final class IrSimpleType extends
 
     public Builder mergeFrom(org.jetbrains.kotlin.backend.common.serialization.proto.IrSimpleType other) {
       if (other == org.jetbrains.kotlin.backend.common.serialization.proto.IrSimpleType.getDefaultInstance()) return this;
-      if (other.hasAnnotations()) {
-        mergeAnnotations(other.getAnnotations());
+      if (!other.annotation_.isEmpty()) {
+        if (annotation_.isEmpty()) {
+          annotation_ = other.annotation_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureAnnotationIsMutable();
+          annotation_.addAll(other.annotation_);
+        }
+        
       }
       if (other.hasClassifier()) {
         setClassifier(other.getClassifier());
@@ -503,10 +527,6 @@ public final class IrSimpleType extends
     }
 
     public final boolean isInitialized() {
-      if (!hasAnnotations()) {
-        
-        return false;
-      }
       if (!hasClassifier()) {
         
         return false;
@@ -515,9 +535,11 @@ public final class IrSimpleType extends
         
         return false;
       }
-      if (!getAnnotations().isInitialized()) {
-        
-        return false;
+      for (int i = 0; i < getAnnotationCount(); i++) {
+        if (!getAnnotation(i).isInitialized()) {
+          
+          return false;
+        }
       }
       for (int i = 0; i < getArgumentCount(); i++) {
         if (!getArgument(i).isInitialized()) {
@@ -553,63 +575,128 @@ public final class IrSimpleType extends
     }
     private int bitField0_;
 
-    private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
+      java.util.Collections.emptyList();
+    private void ensureAnnotationIsMutable() {
+      if (!((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
+        bitField0_ |= 0x00000001;
+       }
+    }
+
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public boolean hasAnnotations() {
-      return ((bitField0_ & 0x00000001) == 0x00000001);
+    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+      return java.util.Collections.unmodifiableList(annotation_);
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-      return annotations_;
+    public int getAnnotationCount() {
+      return annotation_.size();
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
+    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+      return annotation_.get(index);
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
       if (value == null) {
         throw new NullPointerException();
       }
-      annotations_ = value;
+      ensureAnnotationIsMutable();
+      annotation_.set(index, value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder builderForValue) {
-      annotations_ = builderForValue.build();
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.set(index, builderForValue.build());
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder mergeAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
-      if (((bitField0_ & 0x00000001) == 0x00000001) &&
-          annotations_ != org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) {
-        annotations_ =
-          org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder(annotations_).mergeFrom(value).buildPartial();
-      } else {
-        annotations_ = value;
+    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
       }
+      ensureAnnotationIsMutable();
+      annotation_.add(value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder clearAnnotations() {
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureAnnotationIsMutable();
+      annotation_.add(index, value);
 
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(index, builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAllAnnotation(
+        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
+      ensureAnnotationIsMutable();
+      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
+          values, annotation_);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder clearAnnotation() {
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder removeAnnotation(int index) {
+      ensureAnnotationIsMutable();
+      annotation_.remove(index);
+
       return this;
     }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleTypeOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleTypeOrBuilder.java
index c959cfb5832..7a50333379e 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleTypeOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrSimpleTypeOrBuilder.java
@@ -8,13 +8,18 @@ public interface IrSimpleTypeOrBuilder extends
     org.jetbrains.kotlin.protobuf.MessageLiteOrBuilder {
 
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  boolean hasAnnotations();
+  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
+      getAnnotationList();
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations();
+  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  int getAnnotationCount();
 
   /**
    * <code>required int32 classifier = 2;</code>
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviation.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviation.java
index e6d3e4f2ae6..600ef686af9 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviation.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviation.java
@@ -54,25 +54,20 @@ public final class IrTypeAbbreviation extends
             break;
           }
           case 10: {
-            org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder subBuilder = null;
-            if (((bitField0_ & 0x00000001) == 0x00000001)) {
-              subBuilder = annotations_.toBuilder();
+            if (!((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+              annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>();
+              mutable_bitField0_ |= 0x00000001;
             }
-            annotations_ = input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.PARSER, extensionRegistry);
-            if (subBuilder != null) {
-              subBuilder.mergeFrom(annotations_);
-              annotations_ = subBuilder.buildPartial();
-            }
-            bitField0_ |= 0x00000001;
+            annotation_.add(input.readMessage(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.PARSER, extensionRegistry));
             break;
           }
           case 16: {
-            bitField0_ |= 0x00000002;
+            bitField0_ |= 0x00000001;
             typeAlias_ = input.readInt32();
             break;
           }
           case 24: {
-            bitField0_ |= 0x00000004;
+            bitField0_ |= 0x00000002;
             hasQuestionMark_ = input.readBool();
             break;
           }
@@ -92,6 +87,9 @@ public final class IrTypeAbbreviation extends
       throw new org.jetbrains.kotlin.protobuf.InvalidProtocolBufferException(
           e.getMessage()).setUnfinishedMessage(this);
     } finally {
+      if (((mutable_bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+      }
       if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
         argument_ = java.util.Collections.unmodifiableList(argument_);
       }
@@ -121,19 +119,39 @@ public final class IrTypeAbbreviation extends
   }
 
   private int bitField0_;
-  public static final int ANNOTATIONS_FIELD_NUMBER = 1;
-  private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_;
+  public static final int ANNOTATION_FIELD_NUMBER = 1;
+  private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_;
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public boolean hasAnnotations() {
-    return ((bitField0_ & 0x00000001) == 0x00000001);
+  public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+    return annotation_;
   }
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-    return annotations_;
+  public java.util.List<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder> 
+      getAnnotationOrBuilderList() {
+    return annotation_;
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public int getAnnotationCount() {
+    return annotation_.size();
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+    return annotation_.get(index);
+  }
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCallOrBuilder getAnnotationOrBuilder(
+      int index) {
+    return annotation_.get(index);
   }
 
   public static final int TYPE_ALIAS_FIELD_NUMBER = 2;
@@ -142,7 +160,7 @@ public final class IrTypeAbbreviation extends
    * <code>required int32 type_alias = 2;</code>
    */
   public boolean hasTypeAlias() {
-    return ((bitField0_ & 0x00000002) == 0x00000002);
+    return ((bitField0_ & 0x00000001) == 0x00000001);
   }
   /**
    * <code>required int32 type_alias = 2;</code>
@@ -157,7 +175,7 @@ public final class IrTypeAbbreviation extends
    * <code>required bool has_question_mark = 3;</code>
    */
   public boolean hasHasQuestionMark() {
-    return ((bitField0_ & 0x00000004) == 0x00000004);
+    return ((bitField0_ & 0x00000002) == 0x00000002);
   }
   /**
    * <code>required bool has_question_mark = 3;</code>
@@ -202,7 +220,7 @@ public final class IrTypeAbbreviation extends
   }
 
   private void initFields() {
-    annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    annotation_ = java.util.Collections.emptyList();
     typeAlias_ = 0;
     hasQuestionMark_ = false;
     argument_ = java.util.Collections.emptyList();
@@ -213,10 +231,6 @@ public final class IrTypeAbbreviation extends
     if (isInitialized == 1) return true;
     if (isInitialized == 0) return false;
 
-    if (!hasAnnotations()) {
-      memoizedIsInitialized = 0;
-      return false;
-    }
     if (!hasTypeAlias()) {
       memoizedIsInitialized = 0;
       return false;
@@ -225,9 +239,11 @@ public final class IrTypeAbbreviation extends
       memoizedIsInitialized = 0;
       return false;
     }
-    if (!getAnnotations().isInitialized()) {
-      memoizedIsInitialized = 0;
-      return false;
+    for (int i = 0; i < getAnnotationCount(); i++) {
+      if (!getAnnotation(i).isInitialized()) {
+        memoizedIsInitialized = 0;
+        return false;
+      }
     }
     for (int i = 0; i < getArgumentCount(); i++) {
       if (!getArgument(i).isInitialized()) {
@@ -242,13 +258,13 @@ public final class IrTypeAbbreviation extends
   public void writeTo(org.jetbrains.kotlin.protobuf.CodedOutputStream output)
                       throws java.io.IOException {
     getSerializedSize();
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
-      output.writeMessage(1, annotations_);
+    for (int i = 0; i < annotation_.size(); i++) {
+      output.writeMessage(1, annotation_.get(i));
     }
-    if (((bitField0_ & 0x00000002) == 0x00000002)) {
+    if (((bitField0_ & 0x00000001) == 0x00000001)) {
       output.writeInt32(2, typeAlias_);
     }
-    if (((bitField0_ & 0x00000004) == 0x00000004)) {
+    if (((bitField0_ & 0x00000002) == 0x00000002)) {
       output.writeBool(3, hasQuestionMark_);
     }
     for (int i = 0; i < argument_.size(); i++) {
@@ -263,15 +279,15 @@ public final class IrTypeAbbreviation extends
     if (size != -1) return size;
 
     size = 0;
-    if (((bitField0_ & 0x00000001) == 0x00000001)) {
+    for (int i = 0; i < annotation_.size(); i++) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
-        .computeMessageSize(1, annotations_);
+        .computeMessageSize(1, annotation_.get(i));
     }
-    if (((bitField0_ & 0x00000002) == 0x00000002)) {
+    if (((bitField0_ & 0x00000001) == 0x00000001)) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeInt32Size(2, typeAlias_);
     }
-    if (((bitField0_ & 0x00000004) == 0x00000004)) {
+    if (((bitField0_ & 0x00000002) == 0x00000002)) {
       size += org.jetbrains.kotlin.protobuf.CodedOutputStream
         .computeBoolSize(3, hasQuestionMark_);
     }
@@ -373,7 +389,7 @@ public final class IrTypeAbbreviation extends
 
     public Builder clear() {
       super.clear();
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
       typeAlias_ = 0;
       bitField0_ = (bitField0_ & ~0x00000002);
@@ -404,16 +420,17 @@ public final class IrTypeAbbreviation extends
       org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation result = new org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation(this);
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
-      if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
-        to_bitField0_ |= 0x00000001;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = java.util.Collections.unmodifiableList(annotation_);
+        bitField0_ = (bitField0_ & ~0x00000001);
       }
-      result.annotations_ = annotations_;
+      result.annotation_ = annotation_;
       if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
-        to_bitField0_ |= 0x00000002;
+        to_bitField0_ |= 0x00000001;
       }
       result.typeAlias_ = typeAlias_;
       if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
-        to_bitField0_ |= 0x00000004;
+        to_bitField0_ |= 0x00000002;
       }
       result.hasQuestionMark_ = hasQuestionMark_;
       if (((bitField0_ & 0x00000008) == 0x00000008)) {
@@ -427,8 +444,15 @@ public final class IrTypeAbbreviation extends
 
     public Builder mergeFrom(org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation other) {
       if (other == org.jetbrains.kotlin.backend.common.serialization.proto.IrTypeAbbreviation.getDefaultInstance()) return this;
-      if (other.hasAnnotations()) {
-        mergeAnnotations(other.getAnnotations());
+      if (!other.annotation_.isEmpty()) {
+        if (annotation_.isEmpty()) {
+          annotation_ = other.annotation_;
+          bitField0_ = (bitField0_ & ~0x00000001);
+        } else {
+          ensureAnnotationIsMutable();
+          annotation_.addAll(other.annotation_);
+        }
+        
       }
       if (other.hasTypeAlias()) {
         setTypeAlias(other.getTypeAlias());
@@ -452,10 +476,6 @@ public final class IrTypeAbbreviation extends
     }
 
     public final boolean isInitialized() {
-      if (!hasAnnotations()) {
-        
-        return false;
-      }
       if (!hasTypeAlias()) {
         
         return false;
@@ -464,9 +484,11 @@ public final class IrTypeAbbreviation extends
         
         return false;
       }
-      if (!getAnnotations().isInitialized()) {
-        
-        return false;
+      for (int i = 0; i < getAnnotationCount(); i++) {
+        if (!getAnnotation(i).isInitialized()) {
+          
+          return false;
+        }
       }
       for (int i = 0; i < getArgumentCount(); i++) {
         if (!getArgument(i).isInitialized()) {
@@ -496,63 +518,128 @@ public final class IrTypeAbbreviation extends
     }
     private int bitField0_;
 
-    private org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    private java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> annotation_ =
+      java.util.Collections.emptyList();
+    private void ensureAnnotationIsMutable() {
+      if (!((bitField0_ & 0x00000001) == 0x00000001)) {
+        annotation_ = new java.util.ArrayList<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall>(annotation_);
+        bitField0_ |= 0x00000001;
+       }
+    }
+
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public boolean hasAnnotations() {
-      return ((bitField0_ & 0x00000001) == 0x00000001);
+    public java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> getAnnotationList() {
+      return java.util.Collections.unmodifiableList(annotation_);
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations() {
-      return annotations_;
+    public int getAnnotationCount() {
+      return annotation_.size();
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
+    public org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index) {
+      return annotation_.get(index);
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
       if (value == null) {
         throw new NullPointerException();
       }
-      annotations_ = value;
+      ensureAnnotationIsMutable();
+      annotation_.set(index, value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder setAnnotations(
-        org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.Builder builderForValue) {
-      annotations_ = builderForValue.build();
+    public Builder setAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.set(index, builderForValue.build());
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder mergeAnnotations(org.jetbrains.kotlin.backend.common.serialization.proto.Annotations value) {
-      if (((bitField0_ & 0x00000001) == 0x00000001) &&
-          annotations_ != org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance()) {
-        annotations_ =
-          org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.newBuilder(annotations_).mergeFrom(value).buildPartial();
-      } else {
-        annotations_ = value;
+    public Builder addAnnotation(org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
       }
+      ensureAnnotationIsMutable();
+      annotation_.add(value);
 
-      bitField0_ |= 0x00000001;
       return this;
     }
     /**
-     * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
      */
-    public Builder clearAnnotations() {
-      annotations_ = org.jetbrains.kotlin.backend.common.serialization.proto.Annotations.getDefaultInstance();
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureAnnotationIsMutable();
+      annotation_.add(index, value);
 
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAnnotation(
+        int index, org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall.Builder builderForValue) {
+      ensureAnnotationIsMutable();
+      annotation_.add(index, builderForValue.build());
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder addAllAnnotation(
+        java.lang.Iterable<? extends org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> values) {
+      ensureAnnotationIsMutable();
+      org.jetbrains.kotlin.protobuf.AbstractMessageLite.Builder.addAll(
+          values, annotation_);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder clearAnnotation() {
+      annotation_ = java.util.Collections.emptyList();
       bitField0_ = (bitField0_ & ~0x00000001);
+
+      return this;
+    }
+    /**
+     * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+     */
+    public Builder removeAnnotation(int index) {
+      ensureAnnotationIsMutable();
+      annotation_.remove(index);
+
       return this;
     }
 
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviationOrBuilder.java b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviationOrBuilder.java
index 07a56f03471..253a2300abd 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviationOrBuilder.java
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/proto/IrTypeAbbreviationOrBuilder.java
@@ -8,13 +8,18 @@ public interface IrTypeAbbreviationOrBuilder extends
     org.jetbrains.kotlin.protobuf.MessageLiteOrBuilder {
 
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  boolean hasAnnotations();
+  java.util.List<org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall> 
+      getAnnotationList();
   /**
-   * <code>required .org.jetbrains.kotlin.backend.common.serialization.proto.Annotations annotations = 1;</code>
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
    */
-  org.jetbrains.kotlin.backend.common.serialization.proto.Annotations getAnnotations();
+  org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall getAnnotation(int index);
+  /**
+   * <code>repeated .org.jetbrains.kotlin.backend.common.serialization.proto.IrConstructorCall annotation = 1;</code>
+   */
+  int getAnnotationCount();
 
   /**
    * <code>required int32 type_alias = 2;</code>