[Native] Simplify *.isNativeStdlib() checks as much as possible

...still preserving their reliability.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/CompilerOutput.kt

@@ -9,10 +9,8 @@ import org.jetbrains.kotlin.backend.konan.driver.PhaseContext
 import org.jetbrains.kotlin.backend.konan.llvm.*
 import org.jetbrains.kotlin.backend.konan.llvm.objc.patchObjCRuntimeModule
 import org.jetbrains.kotlin.konan.file.isBitcode
-import org.jetbrains.kotlin.konan.library.KONAN_STDLIB_NAME
 import org.jetbrains.kotlin.konan.target.CompilerOutputKind
-import org.jetbrains.kotlin.library.BaseKotlinLibrary
-import org.jetbrains.kotlin.library.uniqueName
+import org.jetbrains.kotlin.library.isNativeStdlib
 import org.jetbrains.kotlin.utils.addToStdlib.ifNotEmpty
 import java.io.File
 
@@ -64,10 +62,6 @@ internal fun produceCStubs(generationState: NativeGenerationState) {
     }
 }
 
-private val BaseKotlinLibrary.isStdlib: Boolean
-    get() = uniqueName == KONAN_STDLIB_NAME
-
-
 private data class LlvmModules(
         val runtimeModules: List<LLVMModuleRef>,
         val additionalModules: List<LLVMModuleRef>
@@ -82,7 +76,7 @@ private fun collectLlvmModules(generationState: NativeGenerationState, generated
     val config = generationState.config
 
     val (bitcodePartOfStdlib, bitcodeLibraries) = generationState.dependenciesTracker.bitcodeToLink
-            .partition { it.isStdlib && generationState.producedLlvmModuleContainsStdlib }
+            .partition { it.isNativeStdlib && generationState.producedLlvmModuleContainsStdlib }
             .toList()
             .map { libraries ->
                 libraries.flatMap { it.bitcodePaths }.filter { it.isBitcode }

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Fir2Ir.kt

@@ -42,9 +42,8 @@ import org.jetbrains.kotlin.ir.objcinterop.IrObjCOverridabilityCondition
 import org.jetbrains.kotlin.ir.types.IrTypeSystemContextImpl
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
-import org.jetbrains.kotlin.konan.library.KONAN_STDLIB_NAME
+import org.jetbrains.kotlin.library.isNativeStdlib
 import org.jetbrains.kotlin.library.metadata.KlibMetadataFactories
-import org.jetbrains.kotlin.library.uniqueName
 import org.jetbrains.kotlin.name.NativeForwardDeclarationKind
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
 
@@ -150,7 +149,7 @@ internal fun PhaseContext.fir2Ir(
         usedPackages.any { !module.packageFragmentProviderForModuleContentWithoutDependencies.isEmpty(it) }
     }.map { it.second }.toSet()
 
-    resolvedLibraries.find { it.library.uniqueName == KONAN_STDLIB_NAME }?.let {
+    resolvedLibraries.find { it.library.isNativeStdlib }?.let {
         require(usedLibraries.contains(it)) {
             "Internal error: stdlib must be in usedLibraries, if it's in resolvedLibraries"
         }

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportLazy.kt

@@ -448,7 +448,7 @@ internal fun createNamerConfiguration(configuration: ObjCExportLazy.Configuratio
         override val topLevelNamePrefix = abbreviate(configuration.frameworkName)
 
         override fun getAdditionalPrefix(module: ModuleDescriptor): String? {
-            if (module.isStdlib()) return "Kotlin"
+            if (module.isNativeStdlib() || module.isCommonStdlibCheckSpecificallyForIDE()) return "Kotlin"
 
             // Note: incorrect for compiler since it doesn't store ModuleInfo to ModuleDescriptor.
             val moduleInfo = module.getCapability(ModuleInfo.Capability) ?: return null
@@ -463,15 +463,11 @@ internal fun createNamerConfiguration(configuration: ObjCExportLazy.Configuratio
     }
 }
 
-// TODO: find proper solution.
-private fun ModuleDescriptor.isStdlib(): Boolean =
-        this.builtIns == this || this.isCommonStdlib() || this.isNativeStdlib()
-
 private val kotlinSequenceClassId = ClassId.topLevel(FqName("kotlin.sequences.Sequence"))
 
-private fun ModuleDescriptor.isCommonStdlib() =
-        this.findClassAcrossModuleDependencies(kotlinSequenceClassId)?.module == this
-
+// This is a special workaround needed for resolve in the IDE.
+private fun ModuleDescriptor.isCommonStdlibCheckSpecificallyForIDE() =
+        findClassAcrossModuleDependencies(kotlinSequenceClassId)?.module == this
 
 private val KtModifierListOwner.isPublic: Boolean
     get() = this.visibilityModifierTypeOrDefault() == KtTokens.PUBLIC_KEYWORD