[IR] Sort dependencies a bit early

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt

@@ -12,22 +12,11 @@ import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.ir.backend.js.lower.moveBodilessDeclarationsToSeparatePlace
 import org.jetbrains.kotlin.ir.backend.js.transformers.irToJs.IrModuleToJsTransformer
 import org.jetbrains.kotlin.ir.backend.js.utils.JsMainFunctionDetector
-import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.util.ExternalDependenciesGenerator
 import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.library.KotlinLibrary
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.utils.DFS
-
-fun sortDependencies(dependencies: Collection<IrModuleFragment>): Collection<IrModuleFragment> {
-    val mapping = dependencies.map { it.descriptor to it }.toMap()
-
-    return DFS.topologicalOrder(dependencies) { m ->
-        val descriptor = m.descriptor
-        descriptor.allDependencyModules.filter { it != descriptor }.map { mapping[it] }
-    }.reversed()
-}
 
 class CompilerResult(
     val jsCode: String,
@@ -63,8 +52,7 @@ fun compile(
         ).generateUnboundSymbolsAsDependencies()
     }
 
-    // Since modules should be initialized in the correct topological order we sort them
-    val irFiles = sortDependencies(dependencyModules).flatMap { it.files } + moduleFragment.files
+    val irFiles = dependencyModules.flatMap { it.files } + moduleFragment.files
 
     moduleFragment.files.clear()
     moduleFragment.files += irFiles