diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/declarations/IrFunctionBuilder.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/declarations/IrFunctionBuilder.kt
index 7780cb4ca10..fe09ac59dfa 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/declarations/IrFunctionBuilder.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/builders/declarations/IrFunctionBuilder.kt
@@ -23,6 +23,7 @@ class IrFunctionBuilder : IrDeclarationBuilder() {
     var isTailrec: Boolean = false
     var isSuspend: Boolean = false
     var isExpect: Boolean = false
+    var isOperator: Boolean = false
 
     var isPrimary: Boolean = false
 
@@ -37,10 +38,12 @@ class IrFunctionBuilder : IrDeclarationBuilder() {
             modality = from.modality
             isTailrec = from.isTailrec
             isSuspend = from.isSuspend
+            isOperator = from.isOperator
         } else {
             modality = Modality.FINAL
             isTailrec = false
             isSuspend = false
+            isOperator = false
         }
 
         if (from is IrConstructor) {
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt
index c224ee660e2..a62fc8d5ee5 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrSimpleFunction.kt
@@ -29,6 +29,7 @@ interface IrSimpleFunction :
     val isTailrec: Boolean
     val isSuspend: Boolean
     val isFakeOverride: Boolean
+    val isOperator: Boolean
 
     var correspondingPropertySymbol: IrPropertySymbol?
 }
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFunctionImpl.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFunctionImpl.kt
index b3853b64b95..a37710b351e 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFunctionImpl.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFunctionImpl.kt
@@ -9,7 +9,6 @@ import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.descriptors.Visibility
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
-import org.jetbrains.kotlin.ir.declarations.IrProperty
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
@@ -32,6 +31,7 @@ class IrFunctionImpl(
     isExternal: Boolean,
     override val isTailrec: Boolean,
     override val isSuspend: Boolean,
+    override val isOperator: Boolean,
     isExpect: Boolean,
     override val isFakeOverride: Boolean
 ) :
@@ -57,7 +57,8 @@ class IrFunctionImpl(
         isTailrec = symbol.descriptor.isTailrec,
         isSuspend = symbol.descriptor.isSuspend,
         isExpect = symbol.descriptor.isExpect,
-        isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
+        isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
+        isOperator = symbol.descriptor.isOperator
     )
 
     override val descriptor: FunctionDescriptor = symbol.descriptor
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyFunction.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyFunction.kt
index b3e2fb1c7e7..33464000aff 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyFunction.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyFunction.kt
@@ -9,7 +9,6 @@ import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.descriptors.Visibility
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
-import org.jetbrains.kotlin.ir.declarations.IrProperty
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
 import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
@@ -35,6 +34,7 @@ class IrLazyFunction(
     override val isSuspend: Boolean,
     isExpect: Boolean,
     override val isFakeOverride: Boolean,
+    override val isOperator: Boolean,
     stubGenerator: DeclarationStubGenerator,
     typeTranslator: TypeTranslator
 ) :
@@ -59,6 +59,7 @@ class IrLazyFunction(
         isSuspend = symbol.descriptor.isSuspend,
         isExpect = symbol.descriptor.isExpect,
         isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
+        isOperator = symbol.descriptor.isOperator,
         stubGenerator = stubGenerator,
         typeTranslator = TypeTranslator
     )
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrOperators.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrOperators.kt
index e70ad06ead2..15e4d729eb3 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrOperators.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrOperators.kt
@@ -31,13 +31,20 @@ class IrBuiltInOperator(
     name: Name,
     returnType: IrType,
     val suffix: String
-) : IrSimpleFunction, IrBuiltinWithMangle, IrFunctionBase(
-    UNDEFINED_OFFSET, UNDEFINED_OFFSET, IrBuiltIns.BUILTIN_OPERATOR, name, Visibilities.PUBLIC, false, false, false, returnType
-) {
+) :
+    IrSimpleFunction,
+    IrBuiltinWithMangle,
+    IrFunctionBase(
+        UNDEFINED_OFFSET, UNDEFINED_OFFSET, IrBuiltIns.BUILTIN_OPERATOR,
+        name, Visibilities.PUBLIC, false, false, false,
+        returnType
+    ) {
+
     override val modality get() = Modality.FINAL
     override val isTailrec get() = false
     override val isSuspend get() = false
     override val isFakeOverride get() = false
+    override val isOperator: Boolean get() = false
     override var correspondingPropertySymbol: IrPropertySymbol?
         get() = null
         set(_) {}
@@ -57,6 +64,7 @@ class IrBuiltInOperator(
 
 class IrBuiltInOperatorValueParameter(override val symbol: IrValueParameterSymbol, override val index: Int, override val type: IrType) :
     IrValueParameter, IrDeclarationBase(UNDEFINED_OFFSET, UNDEFINED_OFFSET, IrBuiltIns.BUILTIN_OPERATOR) {
+
     override val descriptor: ParameterDescriptor get() = symbol.descriptor
     override val varargElementType: IrType? get() = null
     override val isCrossinline: Boolean get() = false
@@ -84,6 +92,7 @@ class IrBuiltInOperatorTypeParameter(
     override val index: Int,
     override val isReified: Boolean
 ) : IrTypeParameter, IrDeclarationBase(UNDEFINED_OFFSET, UNDEFINED_OFFSET, IrBuiltIns.BUILTIN_OPERATOR) {
+
     override val descriptor: TypeParameterDescriptor get() = symbol.descriptor
     override val superTypes: MutableList<IrType> = SmartList()
     override val name: Name = Name.identifier("T$index")
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt
index a2de99691a2..b7e64eb5881 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt
@@ -167,7 +167,8 @@ open class DeepCopyIrTreeWithSymbols(
             isTailrec = declaration.isTailrec,
             isSuspend = declaration.isSuspend,
             isExpect = declaration.isExpect,
-            isFakeOverride = declaration.isFakeOverride
+            isFakeOverride = declaration.isFakeOverride,
+            isOperator = declaration.isOperator
         ).apply {
             declaration.overriddenSymbols.mapTo(overriddenSymbols) {
                 symbolRemapper.getReferencedFunction(it) as IrSimpleFunctionSymbol
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrElement.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrElement.kt
index 9dd8395e19d..94a28b9e0ae 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrElement.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrElement.kt
@@ -383,7 +383,8 @@ class RenderIrElementVisitor(private val normalizeNames: Boolean = false) : IrEl
             "external".takeIf { isExternal },
             "suspend".takeIf { isSuspend },
             "expect".takeIf { isExpect },
-            "fake_override".takeIf { isFakeOverride }
+            "fake_override".takeIf { isFakeOverride },
+            "operator".takeIf { isOperator }
         )
 
     private fun IrFunction.renderTypeParameters(): String =