diff --git a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt
index ec478c16a95..50b71be669c 100644
--- a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt
+++ b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileReaders.kt
@@ -36,6 +36,36 @@ abstract class IrArrayReader(private val buffer: ReadBuffer) {
 class IrArrayFileReader(file: File) : IrArrayReader(ReadBuffer.WeakFileBuffer(file.javaFile()))
 class IrArrayMemoryReader(bytes: ByteArray) : IrArrayReader(ReadBuffer.MemoryBuffer(bytes))
 
+class IrIntArrayMemoryReader(bytes: ByteArray) {
+
+    val array = run {
+        val buffer = ReadBuffer.MemoryBuffer(bytes)
+
+        val result = IntArray(buffer.int)
+
+        for (i in result.indices) {
+            result[i] = buffer.int
+        }
+
+        result
+    }
+}
+
+class IrLongArrayMemoryReader(bytes: ByteArray) {
+
+    val array = run {
+        val buffer = ReadBuffer.MemoryBuffer(bytes)
+
+        val result = LongArray(buffer.int)
+
+        for (i in result.indices) {
+            result[i] = buffer.long
+        }
+
+        result
+    }
+}
+
 abstract class IrMultiArrayReader(private val buffer: ReadBuffer) {
     private val indexToOffset: IntArray
     private val indexIndexToOffset = mutableMapOf<Int, IntArray>()
@@ -188,3 +218,6 @@ class DeclarationIrMultiTableFileReader(file: File) :
 
 class DeclarationIrMultiTableMemoryReader(bytes: ByteArray) :
     IrMultiTableReader<DeclarationId>(ReadBuffer.MemoryBuffer(bytes), { DeclarationId(int) })
+
+
+fun IrArrayReader.toArray(): Array<ByteArray> = Array(this.entryCount()) { i -> this.tableItemBytes(i) }
\ No newline at end of file
diff --git a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileWriters.kt b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileWriters.kt
index 66f27dceb4e..27d110b3253 100644
--- a/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileWriters.kt
+++ b/compiler/util-klib/src/org/jetbrains/kotlin/library/impl/IrFileWriters.kt
@@ -74,6 +74,22 @@ class IrMemoryStringWriter(private val data: List<String>) : IrMemoryWriter() {
     }
 }
 
+class IrMemoryIntArrayWriter(private val data: List<Int>) : IrMemoryWriter() {
+    override fun writeData(dataOutput: DataOutput) {
+        dataOutput.writeInt(data.size)
+
+        data.forEach { dataOutput.writeInt(it) }
+    }
+}
+
+class IrMemoryLongArrayWriter(private val data: List<Long>) : IrMemoryWriter() {
+    override fun writeData(dataOutput: DataOutput) {
+        dataOutput.writeInt(data.size)
+
+        data.forEach { dataOutput.writeLong(it) }
+    }
+}
+
 class IrByteArrayWriter(private val data: List<ByteArray>) : IrFileWriter() {
     override fun writeData(dataOutput: DataOutput) {
         dataOutput.writeInt(data.size)