From 66dbd9185179f04296e0e6318c7fac265d26be56 Mon Sep 17 00:00:00 2001
From: Alexander Udalov <alexander.udalov@jetbrains.com>
Date: Thu, 12 Aug 2021 12:34:30 +0200
Subject: [PATCH] IR: minor, remove unused 'isInlined'

---
 .../jetbrains/kotlin/ir/util/InlineClasses.kt | 53 -------------------
 .../kotlin/backend/konan/InlineClasses.kt     |  8 ---
 2 files changed, 61 deletions(-)

diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/InlineClasses.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/InlineClasses.kt
index abcaa7b5d14..ecfc42a142d 100644
--- a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/InlineClasses.kt
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/InlineClasses.kt
@@ -9,60 +9,7 @@ import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrConstructor
 import org.jetbrains.kotlin.ir.declarations.IrField
 import org.jetbrains.kotlin.ir.declarations.IrProperty
-import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
-import org.jetbrains.kotlin.ir.symbols.IrScriptSymbol
-import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
-import org.jetbrains.kotlin.ir.types.IrSimpleType
 import org.jetbrains.kotlin.ir.types.IrType
-import org.jetbrains.kotlin.ir.types.classifierOrFail
-import org.jetbrains.kotlin.ir.types.isMarkedNullable
-
-/**
- * Returns inline class for given class or null of type is not inlined
- * TODO: Make this configurable for different backends (currently implements logic of JS BE)
- */
-private fun IrType.getInlinedClass(): IrClass? {
-    if (this is IrSimpleType) {
-        val erased = erase(this) ?: return null
-        if (erased.isInline) {
-            if (this.isMarkedNullable()) {
-                var fieldType: IrType
-                var fieldInlinedClass = erased
-                while (true) {
-                    fieldType = getInlineClassUnderlyingType(fieldInlinedClass)
-                    if (fieldType.isMarkedNullable()) {
-                        return null
-                    }
-
-                    fieldInlinedClass = fieldType.getInlinedClass() ?: break
-                }
-            }
-
-            return erased
-        }
-    }
-    return null
-}
-
-/**
- * Do not use this function in the JVM backend! Use `isInlineClassType` instead.
- *
- * This function has slightly different semantics for generic type parameters with inline class bounds.
- *
- * TODO: examine remaining usages in Native and preferably remove this function.
- */
-fun IrType.isInlined(): Boolean = this.getInlinedClass() != null
-
-private tailrec fun erase(type: IrType): IrClass? {
-    val classifier = type.classifierOrFail
-
-    return when (classifier) {
-        is IrClassSymbol -> classifier.owner
-        is IrScriptSymbol -> null // TODO: check if correct
-        is IrTypeParameterSymbol -> erase(classifier.owner.superTypes.first())
-        else -> error(classifier)
-    }
-}
 
 fun getInlineClassUnderlyingType(irClass: IrClass): IrType {
     for (declaration in irClass.declarations) {
diff --git a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/InlineClasses.kt b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/InlineClasses.kt
index e2f3070e554..b2a2e8c1564 100644
--- a/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/InlineClasses.kt
+++ b/kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/InlineClasses.kt
@@ -33,16 +33,8 @@ import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.isNullable
 import org.jetbrains.kotlin.types.typeUtil.makeNullable
 
-/**
- * TODO: there is [IrType::getInlinedClass] in [org.jetbrains.kotlin.ir.util] which isn't compatible with
- * Native's implementation. Please take a look while commonization.
- */
 fun IrType.getInlinedClassNative(): IrClass? = IrTypeInlineClassesSupport.getInlinedClass(this)
 
-/**
- * TODO: there is [IrType::isInlined] in [org.jetbrains.kotlin.ir.util] which isn't compatible with
- * Native's implementation. Please take a look while commonization.
- */
 fun IrType.isInlinedNative(): Boolean = IrTypeInlineClassesSupport.isInlined(this)
 fun IrClass.isInlined(): Boolean = IrTypeInlineClassesSupport.isInlined(this)
 fun IrClass.isNativePrimitiveType() = IrTypeInlineClassesSupport.isTopLevelClass(this) &&