[FIR2IR] Correct 'this' conversion when it points to non-closest class

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConversionScope.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.fir.backend
 import org.jetbrains.kotlin.fir.declarations.FirSimpleFunction
 import org.jetbrains.kotlin.fir.expressions.FirReturnExpression
 import org.jetbrains.kotlin.ir.declarations.*
+import org.jetbrains.kotlin.ir.util.parentClassOrNull
 
 class Fir2IrConversionScope {
     private val parentStack = mutableListOf<IrDeclarationParent>()
@@ -76,6 +77,15 @@ class Fir2IrConversionScope {
 
     fun parent(): IrDeclarationParent? = parentStack.lastOrNull()
 
+    fun dispatchReceiverParameter(irClass: IrClass): IrValueParameter? {
+        for (function in functionStack.asReversed()) {
+            if (function.parentClassOrNull == irClass) {
+                function.dispatchReceiverParameter?.let { return it }
+            }
+        }
+        return irClass.thisReceiver
+    }
+
     fun lastDispatchReceiverParameter(): IrValueParameter? {
         // Use the dispatch receiver of the containing/enclosing functions (from the last to the first)
         for (function in functionStack.asReversed()) {

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrVisitor.kt

@@ -285,21 +285,20 @@ class Fir2IrVisitor(
 
     override fun visitThisReceiverExpression(thisReceiverExpression: FirThisReceiverExpression, data: Any?): IrElement {
         val calleeReference = thisReceiverExpression.calleeReference
-        if (calleeReference.labelName == null && calleeReference.boundSymbol is FirClassSymbol) {
+        val boundSymbol = calleeReference.boundSymbol
+        if (calleeReference.labelName == null && boundSymbol is FirClassSymbol) {
             // Object case
-            val firObject = (calleeReference.boundSymbol?.fir as? FirClass)?.takeIf {
-                it is FirAnonymousObject || it is FirRegularClass && it.classKind == ClassKind.OBJECT
-            }
-            if (firObject != null) {
-                val irObject = classifierStorage.getCachedIrClass(firObject)!!
-                if (irObject != conversionScope.lastClass()) {
+            val firClass = boundSymbol.fir as FirClass
+            val irClass = classifierStorage.getCachedIrClass(firClass)!!
+            if (firClass is FirAnonymousObject || firClass is FirRegularClass && firClass.classKind == ClassKind.OBJECT) {
+                if (irClass != conversionScope.lastClass()) {
                     return thisReceiverExpression.convertWithOffsets { startOffset, endOffset ->
-                        IrGetObjectValueImpl(startOffset, endOffset, irObject.defaultType, irObject.symbol)
+                        IrGetObjectValueImpl(startOffset, endOffset, irClass.defaultType, irClass.symbol)
                     }
                 }
             }
 
-            val dispatchReceiver = conversionScope.lastDispatchReceiverParameter()
+            val dispatchReceiver = conversionScope.dispatchReceiverParameter(irClass)
             if (dispatchReceiver != null) {
                 return thisReceiverExpression.convertWithOffsets { startOffset, endOffset ->
                     IrGetValueImpl(startOffset, endOffset, dispatchReceiver.type, dispatchReceiver.symbol)

compiler/testData/codegen/box/classes/selfcreate.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 class B () {}
 
 open class A(val b : B) {

compiler/testData/codegen/box/extensionProperties/accessorForPrivateSetter.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 class A {
     var result = "Fail"
 

compiler/testData/codegen/box/functions/kt1413.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 package t
 
 interface I{

compiler/testData/codegen/box/innerNested/superConstructorCall/objectExtendsLocalCaptureInSuperCall.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 open class A(val s: String)
 
 fun box(): String {

compiler/testData/codegen/box/objects/kt1136.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 public object SomeObject {

compiler/testData/codegen/box/objects/objectLiteral.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 class C(x: Int, val y: Int) {
     fun initChild(x0: Int): Any {
         var x = x0

compiler/testData/codegen/box/operatorConventions/kt14201.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface Intf {
     val aValue: String
 }

compiler/testData/codegen/box/properties/classFieldInsideNested.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 abstract class Your {
     abstract val your: String
 

compiler/testData/ir/irText/classes/outerClassAccess.fir.txt

@@ -19,7 +19,7 @@ FILE fqName:<root> fileName:/outerClassAccess.kt
         $this: VALUE_PARAMETER name:<this> type:<root>.Outer.Inner
         BLOCK_BODY
           CALL 'public final fun foo (): kotlin.Unit declared in <root>.Outer' type=kotlin.Unit origin=null
-            $this: GET_VAR '<this>: <root>.Outer.Inner declared in <root>.Outer.Inner.test' type=<root>.Outer.Inner origin=null
+            $this: GET_VAR '<this>: <root>.Outer declared in <root>.Outer' type=<root>.Outer origin=null
       CLASS CLASS name:Inner2 modality:FINAL visibility:public [inner] superTypes:[kotlin.Any]
         $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.Outer.Inner.Inner2
         CONSTRUCTOR visibility:public <> ($this:<root>.Outer.Inner.Inner2) returnType:<root>.Outer.Inner.Inner2 [primary]
@@ -31,9 +31,9 @@ FILE fqName:<root> fileName:/outerClassAccess.kt
           $this: VALUE_PARAMETER name:<this> type:<root>.Outer.Inner.Inner2
           BLOCK_BODY
             CALL 'public final fun test (): kotlin.Unit declared in <root>.Outer.Inner' type=kotlin.Unit origin=null
-              $this: GET_VAR '<this>: <root>.Outer.Inner.Inner2 declared in <root>.Outer.Inner.Inner2.test2' type=<root>.Outer.Inner.Inner2 origin=null
+              $this: GET_VAR '<this>: <root>.Outer.Inner declared in <root>.Outer.Inner' type=<root>.Outer.Inner origin=null
             CALL 'public final fun foo (): kotlin.Unit declared in <root>.Outer' type=kotlin.Unit origin=null
-              $this: GET_VAR '<this>: <root>.Outer.Inner.Inner2 declared in <root>.Outer.Inner.Inner2.test2' type=<root>.Outer.Inner.Inner2 origin=null
+              $this: GET_VAR '<this>: <root>.Outer declared in <root>.Outer' type=<root>.Outer origin=null
         FUN name:test3 visibility:public modality:FINAL <> ($this:<root>.Outer.Inner.Inner2, $receiver:<root>.Outer) returnType:kotlin.Unit
           $this: VALUE_PARAMETER name:<this> type:<root>.Outer.Inner.Inner2
           $receiver: VALUE_PARAMETER name:<this> type:<root>.Outer

compiler/testData/ir/irText/expressions/multipleThisReferences.fir.txt

@@ -86,7 +86,7 @@ FILE fqName:<root> fileName:/multipleThisReferences.kt
                   EXPRESSION_BODY
                     CALL 'public final fun plus (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=PLUS
                       $this: CALL 'public final fun <get-x> (): kotlin.Int declared in <root>.Outer.Inner' type=kotlin.Int origin=GET_PROPERTY
-                        $this: GET_VAR '<this>: <root>.Host declared in <root>.Host.test' type=<root>.Host origin=null
+                        $this: GET_VAR '<this>: <root>.Host.test.<no name provided> declared in <root>.Host.test.<no name provided>' type=<root>.Host.test.<no name provided> origin=null
                       other: CALL 'public final fun <get-y> (): kotlin.Int declared in <root>.Host' type=kotlin.Int origin=GET_PROPERTY
                         $this: GET_VAR '<this>: <root>.Host declared in <root>.Host.test' type=<root>.Host origin=null
                 FUN DEFAULT_PROPERTY_ACCESSOR name:<get-xx> visibility:public modality:FINAL <> ($this:<root>.Host.test.<no name provided>) returnType:kotlin.Int

compiler/testData/ir/irText/expressions/outerClassInstanceReference.fir.txt

@@ -20,7 +20,7 @@ FILE fqName:<root> fileName:/outerClassInstanceReference.kt
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public final fun inner (): kotlin.Unit declared in <root>.Outer.Inner'
             CALL 'public final fun outer (): kotlin.Unit declared in <root>.Outer' type=kotlin.Unit origin=null
-              $this: GET_VAR '<this>: <root>.Outer.Inner declared in <root>.Outer.Inner.inner' type=<root>.Outer.Inner origin=null
+              $this: GET_VAR '<this>: <root>.Outer declared in <root>.Outer' type=<root>.Outer origin=null
       FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
         overridden:
           public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any