diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformerTmp.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformerTmp.kt
index d77af8fae2a..ad9880bd1e6 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformerTmp.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrModuleToJsTransformerTmp.kt
@@ -30,6 +30,19 @@ import java.io.ByteArrayOutputStream
 import java.io.File
 import java.util.*
 
+val String.safeModuleName: String
+    get() {
+        var result = this
+
+        if (result.startsWith('<')) result = result.substring(1)
+        if (result.endsWith('>')) result = result.substring(0, result.length - 1)
+
+        return sanitizeName("kotlin_$result", false)
+    }
+
+val IrModuleFragment.safeName: String
+    get() = name.asString().safeModuleName
+
 enum class TranslationMode(
     val dce: Boolean,
     val perModule: Boolean,
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/MultiModuleSupport.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/MultiModuleSupport.kt
deleted file mode 100644
index 0092940a9bf..00000000000
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/MultiModuleSupport.kt
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.ir.backend.js.transformers.irToJs
-
-import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
-import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
-import org.jetbrains.kotlin.ir.backend.js.utils.IrNamer
-import org.jetbrains.kotlin.ir.backend.js.utils.sanitizeName
-import org.jetbrains.kotlin.ir.builders.declarations.addValueParameter
-import org.jetbrains.kotlin.ir.builders.declarations.buildFun
-import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.expressions.IrCall
-import org.jetbrains.kotlin.ir.expressions.IrExpression
-import org.jetbrains.kotlin.ir.expressions.IrGetField
-import org.jetbrains.kotlin.ir.expressions.IrSetField
-import org.jetbrains.kotlin.ir.expressions.impl.*
-import org.jetbrains.kotlin.ir.util.constructedClass
-import org.jetbrains.kotlin.ir.util.isEffectivelyExternal
-import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
-import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
-import org.jetbrains.kotlin.js.backend.ast.JsName
-import org.jetbrains.kotlin.name.Name
-
-interface CrossModuleReferenceInfo {
-    fun exports(module: IrModuleFragment): List<String>
-
-    fun withReferenceTracking(namer: IrNamer, excludedModules: Iterable<IrModuleFragment>): IrNamerWithImports
-}
-
-interface IrNamerWithImports : IrNamer {
-    fun imports(): List<Pair<IrModuleFragment, List<String>>>
-}
-
-object EmptyCrossModuleReferenceInfo : CrossModuleReferenceInfo {
-    override fun exports(module: IrModuleFragment): List<String> = emptyList()
-
-    override fun withReferenceTracking(namer: IrNamer, excludedModules: Iterable<IrModuleFragment>): IrNamerWithImports =
-        object : IrNamerWithImports, IrNamer by namer {
-            override fun imports() = emptyList<Pair<IrModuleFragment, List<String>>>()
-        }
-}
-
-private class CrossModuleReferenceInfoImpl(val topLevelDeclarationToModule: Map<IrDeclaration, IrModuleFragment>) :
-    CrossModuleReferenceInfo {
-
-    private val exportedNames: MutableMap<IrModuleFragment, MutableSet<String>> = mutableMapOf()
-
-    override fun exports(module: IrModuleFragment): List<String> {
-        return exportedNames[module]?.toList() ?: emptyList()
-    }
-
-    override fun withReferenceTracking(namer: IrNamer, excludedModules: Iterable<IrModuleFragment>): IrNamerWithImports {
-        val excludedModulesSet = excludedModules.toSet()
-
-        return object : IrNamerWithImports, IrNamer by namer {
-
-            override fun imports(): List<Pair<IrModuleFragment, List<String>>> {
-                return importedNames.entries.map { (module, names) -> module to names.toList() }
-            }
-
-            private val importedNames: MutableMap<IrModuleFragment, MutableSet<String>> = mutableMapOf()
-
-            private fun JsName.track(d: IrDeclaration): JsName {
-                topLevelDeclarationToModule[d]?.let { module ->
-                    if (module !in excludedModulesSet) {
-                        importedNames.getOrPut(module) { mutableSetOf() } += this.ident
-                        exportedNames.getOrPut(module) { mutableSetOf() } += this.ident
-                    }
-                }
-
-                return this
-            }
-
-            override fun getNameForConstructor(constructor: IrConstructor): JsName {
-                return namer.getNameForConstructor(constructor).track(constructor.constructedClass)
-            }
-
-            override fun getNameForField(field: IrField): JsName {
-                return namer.getNameForField(field).track(field)
-            }
-
-            override fun getNameForClass(klass: IrClass): JsName {
-                return namer.getNameForClass(klass).track(klass)
-            }
-
-            override fun getNameForStaticFunction(function: IrSimpleFunction): JsName {
-                return namer.getNameForStaticFunction(function).track(function)
-            }
-
-            override fun getNameForStaticDeclaration(declaration: IrDeclarationWithName): JsName {
-                return namer.getNameForStaticDeclaration(declaration).track(declaration)
-            }
-
-            override fun getNameForProperty(property: IrProperty): JsName {
-                return namer.getNameForProperty(property).track(property)
-            }
-        }
-    }
-
-}
-
-fun buildCrossModuleReferenceInfo(modules: Iterable<IrModuleFragment>): CrossModuleReferenceInfo {
-    val map = mutableMapOf<IrDeclaration, IrModuleFragment>()
-
-    modules.forEach { module ->
-        module.files.forEach { file ->
-            file.declarations.forEach { declaration ->
-                map[declaration] = module
-            }
-        }
-    }
-
-    return CrossModuleReferenceInfoImpl(map)
-}
-
-val IrModuleFragment.safeName: String
-    get() = name.asString().safeModuleName
-
-val String.safeModuleName: String
-    get() {
-        var result = this
-
-        if (result.startsWith('<')) result = result.substring(1)
-        if (result.endsWith('>')) result = result.substring(0, result.length - 1)
-
-        return sanitizeName("kotlin_$result", false)
-    }