[Commonizer] Do not re-calculate classifier indices for transformer

^KT-47430

native/commonizer/src/org/jetbrains/kotlin/commonizer/facade.kt

@@ -53,7 +53,7 @@ internal fun commonizeTarget(
 
     parameters.logger.progress(output, "Commonized declarations from ${inputs.targets}") {
         val classifiers = CirKnownClassifiers(
-            classifierIndices = availableTrees.toList().map(::CirClassifierIndex), // TODO NOW: Reuse for transformer!!
+            classifierIndices = availableTrees.toList().map(::CirClassifierIndex),
             commonizedNodes = CirCommonizedClassifierNodes.default(),
             commonDependencies = parameters.dependencyClassifiers(output)
         )
@@ -61,7 +61,7 @@ internal fun commonizeTarget(
         val mergedTree = mergeCirTree(parameters.storageManager, classifiers, availableTrees)
 
         InlineTypeAliasCirNodeTransformer(parameters.storageManager, classifiers).invoke(mergedTree)
-        TypeSubstitutionCirNodeTransformer(parameters.storageManager, classifiers, availableTrees).invoke(mergedTree)
+        TypeSubstitutionCirNodeTransformer(parameters.storageManager, classifiers).invoke(mergedTree)
 
         mergedTree.accept(CommonizationVisitor(classifiers, mergedTree), Unit)
 

native/commonizer/src/org/jetbrains/kotlin/commonizer/transformer/TypeSubstitutionCirNodeTransformer.kt

@@ -10,19 +10,18 @@ import org.jetbrains.kotlin.commonizer.mergedtree.CirNodeRelationship.ParentNode
 import org.jetbrains.kotlin.commonizer.tree.CirTreeRoot
 import org.jetbrains.kotlin.storage.StorageManager
 
-internal fun TypeSubstitutionCirNodeTransformer(
-    storageManager: StorageManager, classifiers: CirKnownClassifiers, roots: Iterable<CirTreeRoot>
-): TypeSubstitutionCirNodeTransformer {
-    val typeSubstitutor = CirAliasTypeSubstitutor(classifiers.commonDependencies, roots.map(::CirClassifierIndex))
-    return TypeSubstitutionCirNodeTransformer(storageManager, classifiers, typeSubstitutor)
-}
-
 internal class TypeSubstitutionCirNodeTransformer(
     private val storageManager: StorageManager,
     private val classifiers: CirKnownClassifiers,
     private val typeSubstitutor: CirTypeSubstitutor
 ) : CirNodeTransformer {
 
+    constructor(storageManager: StorageManager, classifiers: CirKnownClassifiers) : this(
+        storageManager = storageManager,
+        classifiers = classifiers,
+        typeSubstitutor = CirAliasTypeSubstitutor(classifiers.commonDependencies, classifiers.classifierIndices)
+    )
+
     override fun invoke(root: CirRootNode) {
         for (index in 0 until root.targetDeclarations.size) {
             root.modules.forEach { (_, module) -> this(module, index) }