Extract utils from ReferenceSymbolTable

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazySymbolTable.kt

@@ -7,9 +7,7 @@ package org.jetbrains.kotlin.ir.declarations.lazy
 
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.ir.symbols.*
-import org.jetbrains.kotlin.ir.util.DeclarationStubGenerator
-import org.jetbrains.kotlin.ir.util.ReferenceSymbolTable
-import org.jetbrains.kotlin.ir.util.SymbolTable
+import org.jetbrains.kotlin.ir.util.*
 
 
 class IrLazySymbolTable(private val originalTable: SymbolTable) : ReferenceSymbolTable by originalTable {
@@ -59,12 +57,4 @@ class IrLazySymbolTable(private val originalTable: SymbolTable) : ReferenceSymbo
             }
         }
     }
-
-    override fun referenceFunction(callable: CallableDescriptor): IrFunctionSymbol {
-        return super.referenceFunction(callable)
-    }
-
-    override fun referenceClassifier(classifier: ClassifierDescriptor): IrClassifierSymbol {
-        return super.referenceClassifier(classifier)
-    }
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -12,10 +12,7 @@ import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.IrTypeParameterImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrValueParameterImpl
 import org.jetbrains.kotlin.ir.expressions.*
-import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
-import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
-import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
-import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
+import org.jetbrains.kotlin.ir.symbols.*
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.toIrType
 import org.jetbrains.kotlin.name.FqName
@@ -328,3 +325,23 @@ fun IrFunction.createDispatchReceiverParameter() {
         null
     ).also { it.parent = this }
 }
+
+fun ReferenceSymbolTable.referenceClassifier(classifier: ClassifierDescriptor): IrClassifierSymbol =
+    when (classifier) {
+        is TypeParameterDescriptor ->
+            referenceTypeParameter(classifier)
+        is ClassDescriptor ->
+            referenceClass(classifier)
+        else ->
+            throw IllegalArgumentException("Unexpected classifier descriptor: $classifier")
+    }
+
+fun ReferenceSymbolTable.referenceFunction(callable: CallableDescriptor): IrFunctionSymbol =
+    when (callable) {
+        is ClassConstructorDescriptor ->
+            referenceConstructor(callable)
+        is FunctionDescriptor ->
+            referenceSimpleFunction(callable)
+        else ->
+            throw IllegalArgumentException("Unexpected callable descriptor: $callable")
+    }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt

@@ -42,26 +42,6 @@ interface ReferenceSymbolTable {
     fun referenceTypeParameter(classifier: TypeParameterDescriptor): IrTypeParameterSymbol
     fun referenceVariable(descriptor: VariableDescriptor): IrVariableSymbol
 
-    fun referenceFunction(callable: CallableDescriptor): IrFunctionSymbol =
-        when (callable) {
-            is ClassConstructorDescriptor ->
-                referenceConstructor(callable)
-            is FunctionDescriptor ->
-                referenceSimpleFunction(callable)
-            else ->
-                throw IllegalArgumentException("Unexpected callable descriptor: $callable")
-        }
-
-    fun referenceClassifier(classifier: ClassifierDescriptor): IrClassifierSymbol =
-        when (classifier) {
-            is TypeParameterDescriptor ->
-                referenceTypeParameter(classifier)
-            is ClassDescriptor ->
-                referenceClass(classifier)
-            else ->
-                throw IllegalArgumentException("Unexpected classifier descriptor: $classifier")
-        }
-
 
     val declarationSystemTable: SymbolTable
     val referenceSymbolTable: ReferenceSymbolTable