[JS IR] Don't use JVM-specific mangler in JS IR backend

^KT-54638 Fixed

compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/klib/compilerPipeline.kt

@@ -24,8 +24,11 @@ import org.jetbrains.kotlin.diagnostics.impl.PendingDiagnosticsCollectorWithSupp
 import org.jetbrains.kotlin.fir.BinaryModuleData
 import org.jetbrains.kotlin.fir.DependencyListForCliModule
 import org.jetbrains.kotlin.fir.FirSession
-import org.jetbrains.kotlin.fir.backend.*
-import org.jetbrains.kotlin.fir.backend.jvm.FirJvmKotlinMangler
+import org.jetbrains.kotlin.fir.backend.ConstValueProviderImpl
+import org.jetbrains.kotlin.fir.backend.Fir2IrExtensions
+import org.jetbrains.kotlin.fir.backend.Fir2IrVisibilityConverter
+import org.jetbrains.kotlin.fir.backend.extractFirDeclarations
+import org.jetbrains.kotlin.fir.backend.js.FirJsKotlinMangler
 import org.jetbrains.kotlin.fir.declarations.FirFile
 import org.jetbrains.kotlin.fir.descriptors.FirModuleDescriptor
 import org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrar
@@ -130,7 +133,7 @@ fun transformFirToIr(
         linkViaSignatures = false,
         signatureComposerCreator = null,
         irMangler = JsManglerIr,
-        firManglerCreator = { FirJvmKotlinMangler() },
+        firManglerCreator = ::FirJsKotlinMangler,
         visibilityConverter = Fir2IrVisibilityConverter.Default,
         kotlinBuiltIns = builtInsModule ?: DefaultBuiltIns.Instance,
         diagnosticReporter = diagnosticsReporter,

compiler/fir/fir2ir/jvm-backend/src/org/jetbrains/kotlin/fir/backend/jvm/FirJvmMangleComputer.kt

@@ -18,7 +18,7 @@ import org.jetbrains.kotlin.fir.symbols.ConeTypeParameterLookupTag
 import org.jetbrains.kotlin.fir.types.coneType
 
 /**
- * A mangle computer that generates a mangled name for a Kotlin declaration represented by [FirDeclaration].
+ * JVM backend-specific mangle computer that generates a mangled name for a Kotlin declaration represented by [FirDeclaration].
  */
 class FirJvmMangleComputer(
     builder: StringBuilder,

compiler/ir/serialization.js/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
 
 dependencies {
     api(project(":compiler:ir.psi2ir"))
+    api(project(":compiler:fir:fir2ir"))
     api(project(":compiler:ir.serialization.common"))
     api(project(":js:js.frontend"))
 

compiler/ir/serialization.js/src/org/jetbrains/kotlin/fir/backend/js/FirJsKotlinMangler.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2023 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.fir.backend.js
+
+import org.jetbrains.kotlin.backend.common.serialization.mangle.KotlinExportChecker
+import org.jetbrains.kotlin.backend.common.serialization.mangle.KotlinMangleComputer
+import org.jetbrains.kotlin.backend.common.serialization.mangle.MangleMode
+import org.jetbrains.kotlin.fir.NoMutableState
+import org.jetbrains.kotlin.fir.backend.FirBasedKotlinMangler
+import org.jetbrains.kotlin.fir.backend.FirExportCheckerVisitor
+import org.jetbrains.kotlin.fir.backend.FirMangleComputer
+import org.jetbrains.kotlin.fir.declarations.FirDeclaration
+
+@NoMutableState
+class FirJsKotlinMangler : FirBasedKotlinMangler() {
+
+    private class JsFirExportChecker : FirExportCheckerVisitor() {
+        override fun FirDeclaration.isPlatformSpecificExported() = false
+    }
+
+    override fun getExportChecker(compatibleMode: Boolean): KotlinExportChecker<FirDeclaration> {
+        return JsFirExportChecker()
+    }
+
+    override fun getMangleComputer(mode: MangleMode, compatibleMode: Boolean): KotlinMangleComputer<FirDeclaration> {
+        return FirMangleComputer(StringBuilder(256), mode)
+    }
+}

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/Fir2IrJsResultsConverter.kt

@@ -18,8 +18,8 @@ import org.jetbrains.kotlin.diagnostics.DiagnosticReporterFactory
 import org.jetbrains.kotlin.fir.AbstractFirAnalyzerFacade
 import org.jetbrains.kotlin.fir.FirAnalyzerFacade
 import org.jetbrains.kotlin.fir.backend.*
+import org.jetbrains.kotlin.fir.backend.js.FirJsKotlinMangler
 import org.jetbrains.kotlin.fir.backend.jvm.Fir2IrJvmSpecialAnnotationSymbolProvider
-import org.jetbrains.kotlin.fir.backend.jvm.FirJvmKotlinMangler
 import org.jetbrains.kotlin.fir.declarations.FirDeclaration
 import org.jetbrains.kotlin.fir.declarations.FirFile
 import org.jetbrains.kotlin.fir.descriptors.FirModuleDescriptor
@@ -68,7 +68,7 @@ class Fir2IrJsResultsConverter(
         val commonMemberStorage = Fir2IrCommonMemberStorage(
             generateSignatures = false,
             signatureComposerCreator = null,
-            manglerCreator = { FirJvmKotlinMangler() } // TODO: replace with potentially simpler JS version
+            manglerCreator = ::FirJsKotlinMangler
         )
 
         for ((index, part) in inputArtifact.partsForDependsOnModules.withIndex()) {