diff --git a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/CallInterceptor.kt b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/CallInterceptor.kt
index 25f65a40541..c57beebf158 100644
--- a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/CallInterceptor.kt
+++ b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/CallInterceptor.kt
@@ -115,7 +115,7 @@ internal class DefaultCallInterceptor(override val interpreter: IrInterpreter) :
         when {
             Wrapper.mustBeHandledWithWrapper(enumClass) -> {
                 val enumEntryName = environment.convertToState(enumEntry.name.asString(), environment.irBuiltIns.stringType)
-                val valueOfFun = enumClass.declarations.single { it.nameForIrSerialization.asString() == "valueOf" } as IrFunction
+                val valueOfFun = enumClass.functions.single { it.name.asString() == "valueOf" }
                 Wrapper.getEnumEntry(enumClass).invokeMethod(valueOfFun, listOf(enumEntryName))
                 environment.mapOfEnums[enumEntry.symbol] = callStack.popState() as Complex
             }
diff --git a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreterEnvironment.kt b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreterEnvironment.kt
index d1ba717be50..2353069231e 100644
--- a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreterEnvironment.kt
+++ b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/IrInterpreterEnvironment.kt
@@ -8,24 +8,18 @@ package org.jetbrains.kotlin.ir.interpreter
 import org.jetbrains.kotlin.ir.IrBuiltIns
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
-import org.jetbrains.kotlin.ir.declarations.IrProperty
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.impl.IrErrorExpressionImpl
 import org.jetbrains.kotlin.ir.interpreter.proxy.Proxy
 import org.jetbrains.kotlin.ir.interpreter.stack.CallStack
-import org.jetbrains.kotlin.ir.interpreter.state.Common
-import org.jetbrains.kotlin.ir.interpreter.state.Complex
-import org.jetbrains.kotlin.ir.interpreter.state.ExceptionState
-import org.jetbrains.kotlin.ir.interpreter.state.Primitive
-import org.jetbrains.kotlin.ir.interpreter.state.State
-import org.jetbrains.kotlin.ir.interpreter.state.Wrapper
+import org.jetbrains.kotlin.ir.interpreter.state.*
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.ir.util.isSubclassOf
-import org.jetbrains.kotlin.ir.util.nameForIrSerialization
+import org.jetbrains.kotlin.ir.util.properties
 
 class IrInterpreterEnvironment(
     val irBuiltIns: IrBuiltIns,
@@ -144,7 +138,7 @@ class IrInterpreterEnvironment(
     }
 
     private fun IrClassSymbol.getIrClassOfReflectionFromList(name: String): IrClassSymbol? {
-        val property = this.owner.declarations.singleOrNull { it.nameForIrSerialization.asString() == name } as? IrProperty
+        val property = this.owner.properties.singleOrNull { it.name.asString() == name }
         val list = property?.getter?.returnType as? IrSimpleType
         return list?.arguments?.single()?.typeOrNull?.classOrNull
     }
diff --git a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/Utils.kt b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/Utils.kt
index 4719013ad98..8a1f9e33be9 100644
--- a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/Utils.kt
+++ b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/Utils.kt
@@ -216,7 +216,7 @@ internal fun IrFieldAccessExpression.accessesTopLevelOrObjectField(): Boolean {
 }
 
 internal fun IrClass.getOriginalPropertyByName(name: String): IrProperty {
-    val property = this.declarations.single { it.nameForIrSerialization.asString() == name } as IrProperty
+    val property = this.properties.single { it.name.asString() == name }
     return (property.getter!!.getLastOverridden() as IrSimpleFunction).correspondingPropertySymbol!!.owner
 }
 
diff --git a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Common.kt b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Common.kt
index f258d13067a..d48d35e9d33 100644
--- a/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Common.kt
+++ b/compiler/ir/ir.interpreter/src/org/jetbrains/kotlin/ir/interpreter/state/Common.kt
@@ -5,10 +5,7 @@
 
 package org.jetbrains.kotlin.ir.interpreter.state
 
-import org.jetbrains.kotlin.ir.declarations.IrClass
-import org.jetbrains.kotlin.ir.declarations.IrFunction
-import org.jetbrains.kotlin.ir.declarations.IrProperty
-import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
+import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.interpreter.createCall
 import org.jetbrains.kotlin.ir.interpreter.fqName
@@ -17,9 +14,8 @@ import org.jetbrains.kotlin.ir.interpreter.stack.Fields
 import org.jetbrains.kotlin.ir.interpreter.stack.Variable
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.types.isNullableAny
-import org.jetbrains.kotlin.ir.util.nameForIrSerialization
+import org.jetbrains.kotlin.ir.util.functions
 import org.jetbrains.kotlin.ir.util.resolveFakeOverride
-import org.jetbrains.kotlin.name.Name
 
 internal class Common private constructor(override val irClass: IrClass, override val fields: Fields) : Complex, StateWithClosure {
     override val upValues: MutableMap<IrSymbol, Variable> = mutableMapOf()
@@ -42,30 +38,31 @@ internal class Common private constructor(override val irClass: IrClass, overrid
 
     fun getIrFunction(method: java.lang.reflect.Method): IrFunction? {
         val methodName = getKotlinName(method.declaringClass.name, method.name)
-        return when (val declaration = irClass.declarations.singleOrNull { it.nameForIrSerialization.asString() == methodName }) {
+        return when (val declaration =
+            irClass.declarations.singleOrNull { it is IrDeclarationWithName && it.name.asString() == methodName }
+        ) {
             is IrProperty -> declaration.getter
             else -> declaration as? IrFunction
         }
     }
 
     fun getEqualsFunction(): IrSimpleFunction {
-        return irClass.declarations
-            .filterIsInstance<IrSimpleFunction>()
+        return irClass.functions
             .single {
-                it.name == Name.identifier("equals") && it.dispatchReceiverParameter != null && it.extensionReceiverParameter == null
+                it.name.asString() == "equals" && it.dispatchReceiverParameter != null && it.extensionReceiverParameter == null
                         && it.valueParameters.size == 1 && it.valueParameters[0].type.isNullableAny()
             }
             .let { it.resolveFakeOverride() as IrSimpleFunction }
     }
 
     fun getHashCodeFunction(): IrSimpleFunction {
-        return irClass.declarations.filterIsInstance<IrSimpleFunction>()
+        return irClass.functions
             .single { it.name.asString() == "hashCode" && it.valueParameters.isEmpty() && it.extensionReceiverParameter == null }
             .let { it.resolveFakeOverride() as IrSimpleFunction }
     }
 
     fun getToStringFunction(): IrSimpleFunction {
-        return irClass.declarations.filterIsInstance<IrSimpleFunction>()
+        return irClass.functions
             .single { it.name.asString() == "toString" && it.valueParameters.isEmpty() && it.extensionReceiverParameter == null }
             .let { it.resolveFakeOverride() as IrSimpleFunction }
     }
@@ -77,4 +74,4 @@ internal class Common private constructor(override val irClass: IrClass, overrid
     override fun toString(): String {
         return "Common(obj='${irClass.fqName}', values=$fields)"
     }
-}
\ No newline at end of file
+}
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/AdditionalIrUtils.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/AdditionalIrUtils.kt
index 0161a280115..ad3580abbb0 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/AdditionalIrUtils.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/AdditionalIrUtils.kt
@@ -26,7 +26,7 @@ val IrConstructor.constructedClass get() = this.parent as IrClass
 val IrDeclarationParent.fqNameForIrSerialization: FqName
     get() = when (this) {
         is IrPackageFragment -> this.fqName
-        is IrDeclaration -> this.parent.fqNameForIrSerialization.child(this.nameForIrSerialization)
+        is IrDeclarationWithName -> this.parent.fqNameForIrSerialization.child(this.name)
         else -> error(this)
     }
 
@@ -40,10 +40,10 @@ val IrDeclarationParent.kotlinFqName: FqName
             if (isFileClass) {
                 parent.kotlinFqName
             } else {
-                parent.kotlinFqName.child(nameForIrSerialization)
+                parent.kotlinFqName.child(name)
             }
         }
-        is IrDeclaration -> this.parent.kotlinFqName.child(nameForIrSerialization)
+        is IrDeclarationWithName -> this.parent.kotlinFqName.child(name)
         else -> error(this)
     }
 
@@ -54,6 +54,13 @@ val IrClass.classId: ClassId?
         else -> null
     }
 
+@Suppress("unused")
+@Deprecated(
+    "This function is deprecated because it has confusing name and behavior. " +
+            "Please use IrDeclarationWithName.name or IrDeclaration.getNameWithAssert",
+    ReplaceWith("(this as? IrDeclarationWithName)?.name", "org.jetbrains.kotlin.ir.declarations.IrDeclarationWithName"),
+    DeprecationLevel.ERROR
+)
 val IrDeclaration.nameForIrSerialization: Name
     get() = when (this) {
         is IrDeclarationWithName -> this.name
@@ -61,6 +68,9 @@ val IrDeclaration.nameForIrSerialization: Name
         else -> error(this)
     }
 
+fun IrDeclaration.getNameWithAssert(): Name =
+    if (this is IrDeclarationWithName) name else error(this)
+
 val IrValueParameter.isVararg get() = this.varargElementType != null
 
 val IrFunction.isSuspend get() = this is IrSimpleFunction && this.isSuspend
diff --git a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/unlinked/UnlinkedIrElementRenderer.kt b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/unlinked/UnlinkedIrElementRenderer.kt
index 66eec7243a2..99948df7d39 100644
--- a/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/unlinked/UnlinkedIrElementRenderer.kt
+++ b/compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/unlinked/UnlinkedIrElementRenderer.kt
@@ -14,8 +14,8 @@ import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.symbols.*
 import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.ir.util.IdSignature.*
+import org.jetbrains.kotlin.ir.util.getNameWithAssert
 import org.jetbrains.kotlin.ir.util.isAnonymousObject
-import org.jetbrains.kotlin.ir.util.nameForIrSerialization
 
 // TODO: Consider getting rid of this class when new self-descriptive signatures are implemented.
 internal object UnlinkedIrElementRenderer {
@@ -196,7 +196,7 @@ private fun IrSymbol.guessName(): String? {
             }
             effectiveSignature.guessNameBySignature(nameSegmentsToPickUp)
         }
-        ?: boundOwnerDeclarationOrNull?.nameForIrSerialization?.asString()
+        ?: boundOwnerDeclarationOrNull?.getNameWithAssert()?.asString()
 }
 
 private val IrSymbol.anySignature: IdSignature?
diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt
index 6fa48ab8957..af565609107 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt
@@ -114,7 +114,7 @@ private class DeclarationsGeneratorVisitor(override val generationState: NativeG
             return objectNamer.getName(parent, declaration)
         }
 
-        return declaration.nameForIrSerialization
+        return declaration.getNameWithAssert()
     }
 
     private fun getFqName(declaration: IrDeclaration): FqName {
diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/coverage/CoverageRegionCollector.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/coverage/CoverageRegionCollector.kt
index f5466a155c4..23fff448e62 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/coverage/CoverageRegionCollector.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/coverage/CoverageRegionCollector.kt
@@ -11,7 +11,6 @@ import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
-import org.jetbrains.kotlin.ir.util.nameForIrSerialization
 import org.jetbrains.kotlin.ir.util.statements
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
@@ -56,9 +55,9 @@ internal class CoverageRegionCollector(private val fileFilter: (IrFile) -> Boole
 
 // User doesn't bother about compiler-generated declarations.
 // So lets filter them.
-private val IrDeclaration.isGeneratedByCompiler: Boolean
+private val IrFunction.isGeneratedByCompiler: Boolean
     get() {
-        return origin != IrDeclarationOrigin.DEFINED || nameForIrSerialization.asString() == "Konan_start"
+        return origin != IrDeclarationOrigin.DEFINED || name.asString() == "Konan_start"
     }
 
 /**