[IR] Optimize a few hot spots to reduce total CPU time

^KT-61121

compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/impl/KlibMetadataModuleDescriptorFactoryImpl.kt

@@ -16,7 +16,7 @@ import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.library.KotlinLibrary
 import org.jetbrains.kotlin.library.metadata.*
-import org.jetbrains.kotlin.library.unresolvedDependencies
+import org.jetbrains.kotlin.library.hasDependencies
 import org.jetbrains.kotlin.name.NativeForwardDeclarationKind
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.name.parentOrNull
@@ -27,7 +27,7 @@ import org.jetbrains.kotlin.serialization.deserialization.*
 import org.jetbrains.kotlin.storage.StorageManager
 
 private val ModuleDescriptorImpl.isStdlibModule
-    get() = (this.klibModuleOrigin as? DeserializedKlibModuleOrigin)?.library?.unresolvedDependencies?.isEmpty() ?: false
+    get() = (this.klibModuleOrigin as? DeserializedKlibModuleOrigin)?.library?.let { !it.hasDependencies } ?: false
 
 class KlibMetadataModuleDescriptorFactoryImpl(
     override val descriptorFactory: KlibModuleDescriptorFactory,

compiler/util-klib-metadata/src/org/jetbrains/kotlin/library/metadata/impl/KlibResolvedModuleDescriptorsFactoryImpl.kt

@@ -91,18 +91,23 @@ class KlibResolvedModuleDescriptorsFactoryImpl(
         )
 
         // Set inter-dependencies between module descriptors, add forwarding declarations module.
+        val additionalDependencyModulesCopy = additionalDependencyModules.toSet()
+        val friendsForNonIncludedModule = additionalDependencyModulesCopy
+        val friendsForIncludedModule = buildSet<ModuleDescriptorImpl> {
+            this += friendsForNonIncludedModule
+            this += friendModuleDescriptors
+            this += refinesModuleDescriptors
+        }
+        val allDependencies = moduleDescriptors + additionalDependencyModulesCopy + forwardDeclarationsModule
         for (module in moduleDescriptors) {
-            val friends = additionalDependencyModules.toMutableSet()
-            if (module in includedLibraryDescriptors) {
-                friends.addAll(friendModuleDescriptors)
-                friends.addAll(refinesModuleDescriptors)
+            val friends = if (module in includedLibraryDescriptors) {
+                friendsForIncludedModule
+            } else {
+                friendsForNonIncludedModule
             }
 
-            module.setDependencies(
-                // Yes, just to all of them.
-                moduleDescriptors + additionalDependencyModules + forwardDeclarationsModule,
-                friends
-            )
+            // Yes, just to all of them.
+            module.setDependencies(allDependencies, friends)
         }
 
         return KotlinResolvedModuleDescriptors(