diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrAnonymousInitializer.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrAnonymousInitializer.kt
index cc2acb9ba08..7a64c9c2ac8 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrAnonymousInitializer.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrAnonymousInitializer.kt
@@ -15,6 +15,7 @@ import org.jetbrains.kotlin.ir.declarations.persistent.carriers.Carrier
 import org.jetbrains.kotlin.ir.expressions.IrBlockBody
 import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.symbols.IrAnonymousInitializerSymbol
+import org.jetbrains.kotlin.ir.util.IdSignature
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
 
@@ -33,6 +34,8 @@ internal class PersistentIrAnonymousInitializer(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrClass.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrClass.kt
index edb8cb8332c..1bf1581657a 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrClass.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrClass.kt
@@ -30,6 +30,7 @@ import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
 import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrSimpleType
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
@@ -60,6 +61,8 @@ internal class PersistentIrClass(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrConstructor.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrConstructor.kt
index fe01e996c4a..20f108780c3 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrConstructor.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrConstructor.kt
@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.impl.IrUninitializedType
 import org.jetbrains.kotlin.ir.types.impl.ReturnTypeIsNotInitializedException
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 
@@ -51,6 +52,8 @@ internal class PersistentIrConstructor(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrEnumEntry.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrEnumEntry.kt
index ebfd3cd8cf5..5c3cdd2a885 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrEnumEntry.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrEnumEntry.kt
@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.expressions.IrExpressionBody
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrEnumEntrySymbol
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
@@ -36,6 +37,8 @@ internal class PersistentIrEnumEntry(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrErrorDeclaration.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrErrorDeclaration.kt
index 6c4c6958959..b458f93cc52 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrErrorDeclaration.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrErrorDeclaration.kt
@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.ir.declarations.persistent.carriers.Carrier
 import org.jetbrains.kotlin.ir.declarations.persistent.carriers.ErrorDeclarationCarrier
 import org.jetbrains.kotlin.ir.descriptors.toIrBasedDescriptor
 import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
+import org.jetbrains.kotlin.ir.util.IdSignature
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
 
@@ -29,6 +30,8 @@ internal class PersistentIrErrorDeclaration(
     override val descriptor: DeclarationDescriptor
         get() = _descriptor ?: this.toIrBasedDescriptor()
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrField.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrField.kt
index 1977274a1df..015ff0489d0 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrField.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrField.kt
@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.ir.expressions.IrExpressionBody
 import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
 import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
@@ -43,6 +44,8 @@ internal class PersistentIrField(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFunctionCommon.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFunctionCommon.kt
index 0cc43fd38b2..b307f8a0d88 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFunctionCommon.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFunctionCommon.kt
@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.impl.IrUninitializedType
 import org.jetbrains.kotlin.ir.types.impl.ReturnTypeIsNotInitializedException
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 
@@ -49,6 +50,8 @@ internal abstract class PersistentIrFunctionCommon(
     PersistentIrDeclarationBase<FunctionCarrier>,
     FunctionCarrier {
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrLocalDelegatedProperty.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrLocalDelegatedProperty.kt
index d2b2c58542b..3c8a50e0dad 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrLocalDelegatedProperty.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrLocalDelegatedProperty.kt
@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.symbols.IrLocalDelegatedPropertySymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
@@ -41,6 +42,8 @@ internal class PersistentIrLocalDelegatedProperty(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrPropertyCommon.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrPropertyCommon.kt
index b0daa39cc07..21ec0c951e0 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrPropertyCommon.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrPropertyCommon.kt
@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
 import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 
@@ -42,6 +43,8 @@ internal abstract class PersistentIrPropertyCommon(
     PersistentIrDeclarationBase<PropertyCarrier>,
     PropertyCarrier {
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeAlias.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeAlias.kt
index a7cffb90e16..a5e692db1bd 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeAlias.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeAlias.kt
@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.symbols.IrTypeAliasSymbol
 import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
@@ -40,6 +41,8 @@ internal class PersistentIrTypeAlias(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeParameter.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeParameter.kt
index 9664dde732a..846dcbc253f 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeParameter.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrTypeParameter.kt
@@ -15,6 +15,7 @@ import org.jetbrains.kotlin.ir.declarations.persistent.carriers.TypeParameterCar
 import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.types.Variance
 
@@ -38,6 +39,8 @@ internal class PersistentIrTypeParameter(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrValueParameter.kt b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrValueParameter.kt
index 4895c20a46d..b210002a64b 100644
--- a/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrValueParameter.kt
+++ b/compiler/ir/ir.tree.persistent/gen/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrValueParameter.kt
@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.expressions.IrExpressionBody
 import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 
 // Auto-generated by compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/Main.kt. DO NOT EDIT!
@@ -46,6 +47,8 @@ internal class PersistentIrValueParameter(
         symbol.bind(this)
     }
 
+    override var signature: IdSignature? = factory.currentSignature(this)
+
     override var lastModified: Int = factory.stageController.currentStage
     override var loweredUpTo: Int = factory.stageController.currentStage
     override var values: Array<Carrier>? = null
diff --git a/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/ErrorDeclaration.kt b/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/ErrorDeclaration.kt
index 5fb3407e6dd..f1f1f2e8918 100644
--- a/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/ErrorDeclaration.kt
+++ b/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/ErrorDeclaration.kt
@@ -24,6 +24,8 @@ internal fun PersistentIrGenerator.generateErrorDeclaration() {
                     +"    get() = _descriptor ?: this." + import("toIrBasedDescriptor", "org.jetbrains.kotlin.ir.descriptors") + "()"
                 ),
                 id,
+                signature,
+                id,
                 lastModified,
                 loweredUpTo,
                 values,
diff --git a/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/PersistentIrGenerator.kt b/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/PersistentIrGenerator.kt
index fd3e26f6050..8f0fd51b0a4 100644
--- a/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/PersistentIrGenerator.kt
+++ b/compiler/ir/ir.tree.persistent/generator/src/org/jetbrains/kotlin/ir/persistentIrGenerator/PersistentIrGenerator.kt
@@ -97,6 +97,8 @@ internal object PersistentIrGenerator {
     val IrValueParameterSymbol = irSymbol("IrValueParameterSymbol")
     val IrTypeParameterSymbol = irSymbol("IrTypeParameterSymbol")
 
+    val IdSignature = import("IdSignature", "org.jetbrains.kotlin.ir.util")
+
     // Constructor parameters
 
     val startOffset = +"override val startOffset: Int"
@@ -196,6 +198,8 @@ internal object PersistentIrGenerator {
     )
 
     // Fields
+    val signature = +"override var signature: " + IdSignature + "? = factory.currentSignature(this)"
+
     val lastModified = +"override var lastModified: Int = factory.stageController.currentStage"
     val loweredUpTo = +"override var loweredUpTo: Int = factory.stageController.currentStage"
     val values = +"override var values: Array<" + Carrier + ">? = null"
@@ -207,6 +211,8 @@ internal object PersistentIrGenerator {
     val annotationsField = +"override var annotationsField: List<" + IrConstructorCall + "> = emptyList()"
 
     val commonFields = lines(
+        signature,
+        id,
         lastModified,
         loweredUpTo,
         values,
diff --git a/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrDeclarationBase.kt b/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrDeclarationBase.kt
index e63513d1b1b..5b87ada0784 100644
--- a/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrDeclarationBase.kt
+++ b/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrDeclarationBase.kt
@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.ir.declarations.persistent.carriers.DeclarationCarri
 import org.jetbrains.kotlin.ir.expressions.IrBody
 import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.utils.addToStdlib.cast
 
 interface PersistentIrDeclarationBase<T : DeclarationCarrier> : PersistentIrElementBase<T>, IrDeclaration, DeclarationCarrier {
@@ -32,6 +33,8 @@ interface PersistentIrDeclarationBase<T : DeclarationCarrier> : PersistentIrElem
 
     override var annotationsField: List<IrConstructorCall>
 
+    var signature: IdSignature?
+
     // TODO reduce boilerplate
     override var parent: IrDeclarationParent
         get() = getCarrier().parentField ?: throw UninitializedPropertyAccessException("Parent not initialized: $this")
diff --git a/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFactory.kt b/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFactory.kt
index 64ed078cbb9..bfa4868f44f 100644
--- a/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFactory.kt
+++ b/compiler/ir/ir.tree.persistent/src/org/jetbrains/kotlin/ir/declarations/persistent/PersistentIrFactory.kt
@@ -15,6 +15,7 @@ import org.jetbrains.kotlin.ir.expressions.persistent.PersistentIrBlockBody
 import org.jetbrains.kotlin.ir.expressions.persistent.PersistentIrExpressionBody
 import org.jetbrains.kotlin.ir.symbols.*
 import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 import org.jetbrains.kotlin.types.Variance
@@ -23,6 +24,9 @@ class PersistentIrFactory : IrFactory {
 
     override var stageController = StageController()
 
+    @Suppress("UNUSED_PARAMETER")
+    fun currentSignature(declaration: IrDeclaration): IdSignature? = null
+
     override fun createAnonymousInitializer(
         startOffset: Int,
         endOffset: Int,
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/PersistentApi.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/PersistentApi.kt
index 423906922db..abcc0e4bcd0 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/PersistentApi.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/PersistentApi.kt
@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.ir.declarations
 
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.expressions.IrBody
+import org.jetbrains.kotlin.ir.util.IdSignature
 
 open class StageController(open val currentStage: Int = 0) {
     open fun lazyLower(declaration: IrDeclaration) {}
@@ -28,4 +29,7 @@ open class StageController(open val currentStage: Int = 0) {
     open fun <T> unrestrictDeclarationListsAccess(fn: () -> T): T = fn()
 
     open fun canAccessDeclarationsOf(irClass: IrClass): Boolean = true
+
+    // Used in JS IC. Declarations created during lowerings need meaningful signatures.
+    open fun createSignature(parentSignature: IdSignature): IdSignature? = null
 }
\ No newline at end of file