Drop all usages of inlineFunctionSymbol in IrReturnableBlock

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrInlineUtils.kt

@@ -104,7 +104,7 @@ private fun IrBody.move(
 // TODO use a generic inliner (e.g. JS/Native's FunctionInlining.Inliner)
 // Inline simple function calls without type parameters, default parameters, or varargs.
 fun IrFunction.inline(target: IrDeclarationParent, arguments: List<IrValueDeclaration> = listOf()): IrReturnableBlock =
-    IrReturnableBlockImpl(startOffset, endOffset, returnType, IrReturnableBlockSymbolImpl(), null, symbol).apply {
+    IrReturnableBlockImpl(startOffset, endOffset, returnType, IrReturnableBlockSymbolImpl(), null).apply {
         statements += body!!.move(this@inline, target, symbol, explicitParameters.zip(arguments).toMap()).statements
     }
 

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt

@@ -16,6 +16,8 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrVarargImpl
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.isUnit
 import org.jetbrains.kotlin.ir.types.typeWith
+import org.jetbrains.kotlin.ir.util.dump
+import org.jetbrains.kotlin.ir.util.statements
 
 fun IrReturnTarget.returnType(context: CommonBackendContext) =
     when (this) {
@@ -121,3 +123,24 @@ fun CommonBackendContext.createArrayOfExpression(
 }
 
 fun IrFunction.isInlineFunWithReifiedParameter() = isInline && typeParameters.any { it.isReified }
+
+// This code is partially duplicated in jvm FunctionReferenceLowering::adapteeCall
+// The difference is jvm version doesn't support ReturnableBlock, but returns call node instead of called function.
+fun IrFunction.getAdapteeFromAdaptedForReferenceFunction() : IrFunction? {
+    if (origin != IrDeclarationOrigin.ADAPTER_FOR_CALLABLE_REFERENCE) return null
+    // The body of a callable reference adapter contains either only a call, or an IMPLICIT_COERCION_TO_UNIT type operator
+    // applied to a either a call or ReturnableBlock produced from that call inlining.
+    // That call's target is the original function which we need to get.
+    fun unknownStructure(): Nothing = throw UnsupportedOperationException("Unknown structure of ADAPTER_FOR_CALLABLE_REFERENCE: ${dump()}")
+    val call = when (val statement = body?.statements?.singleOrNull() ?: unknownStructure()) {
+        is IrTypeOperatorCall -> {
+            if (statement.operator != IrTypeOperator.IMPLICIT_COERCION_TO_UNIT) unknownStructure()
+            statement.argument
+        }
+        is IrReturn -> statement.value
+        else -> statement
+    }
+    if (call is IrReturnableBlock) return call.inlineFunction ?: unknownStructure()
+    if (call !is IrFunctionAccessExpression) unknownStructure()
+    return call.symbol.owner
+}

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/inline/FunctionInlining.kt

@@ -235,7 +235,6 @@ class FunctionInlining(
                 symbol = irReturnableBlockSymbol,
                 origin = null,
                 statements = listOf(inlinedBlock),
-                inlineFunctionSymbol = inlineFunctionResolver.getFunctionSymbol(callee)
             ).apply {
                 transformChildrenVoid(object : IrElementTransformerVoid() {
                     override fun visitReturn(expression: IrReturn): IrExpression {

compiler/ir/ir.tree/gen/org/jetbrains/kotlin/ir/expressions/IrReturnableBlock.kt

@@ -10,7 +10,6 @@ package org.jetbrains.kotlin.ir.expressions
 
 import org.jetbrains.kotlin.ir.declarations.IrReturnTarget
 import org.jetbrains.kotlin.ir.declarations.IrSymbolOwner
-import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrReturnableBlockSymbol
 
 /**
@@ -19,6 +18,4 @@ import org.jetbrains.kotlin.ir.symbols.IrReturnableBlockSymbol
  */
 abstract class IrReturnableBlock : IrBlock(), IrSymbolOwner, IrReturnTarget {
     abstract override val symbol: IrReturnableBlockSymbol
-
-    abstract var inlineFunctionSymbol: IrFunctionSymbol?
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrBlockImpl.kt

@@ -60,7 +60,6 @@ class IrReturnableBlockImpl(
     override var type: IrType,
     override val symbol: IrReturnableBlockSymbol,
     override var origin: IrStatementOrigin? = null,
-    override var inlineFunctionSymbol: IrFunctionSymbol? = null
 ) : IrReturnableBlock() {
     @ObsoleteDescriptorBasedAPI
     override val descriptor: FunctionDescriptor
@@ -73,8 +72,7 @@ class IrReturnableBlockImpl(
         symbol: IrReturnableBlockSymbol,
         origin: IrStatementOrigin?,
         statements: List<IrStatement>,
-        inlineFunctionSymbol: IrFunctionSymbol? = null
-    ) : this(startOffset, endOffset, type, symbol, origin, inlineFunctionSymbol) {
+    ) : this(startOffset, endOffset, type, symbol, origin) {
         this.statements.addAll(statements)
     }
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt

@@ -457,8 +457,7 @@ open class DeepCopyIrTreeWithSymbols(
                 expression.type.remapType(),
                 symbolRemapper.getReferencedReturnableBlock(expression.symbol),
                 mapStatementOrigin(expression.origin),
-                expression.statements.map { it.transform() },
-                expression.inlineFunctionSymbol
+                expression.statements.map { it.transform() }
             ).copyAttributes(expression)
         else if (expression is IrInlinedFunctionBlock)
             IrInlinedFunctionBlockImpl(

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -1391,27 +1391,6 @@ val IrFunction.isValueClassTypedEquals: Boolean
                 && (parentClass.isValue)
     }
 
-// This code is partially duplicated in jvm FunctionReferenceLowering::adapteeCall
-// The difference is jvm version doesn't support ReturnableBlock, but returns call node instead of called function.
-fun IrFunction.getAdapteeFromAdaptedForReferenceFunction() : IrFunction? {
-    if (origin != IrDeclarationOrigin.ADAPTER_FOR_CALLABLE_REFERENCE) return null
-    // The body of a callable reference adapter contains either only a call, or an IMPLICIT_COERCION_TO_UNIT type operator
-    // applied to a either a call or ReturnableBlock produced from that call inlining.
-    // That call's target is the original function which we need to get.
-    fun unknownStructure(): Nothing = throw UnsupportedOperationException("Unknown structure of ADAPTER_FOR_CALLABLE_REFERENCE: ${dump()}")
-    val call = when (val statement = body?.statements?.singleOrNull() ?: unknownStructure()) {
-        is IrTypeOperatorCall -> {
-            if (statement.operator != IrTypeOperator.IMPLICIT_COERCION_TO_UNIT) unknownStructure()
-            statement.argument
-        }
-        is IrReturn -> statement.value
-        else -> statement
-    }
-    if (call is IrReturnableBlock) return (call.inlineFunctionSymbol ?: unknownStructure()).owner
-    if (call !is IrFunctionAccessExpression) { unknownStructure() }
-    return call.symbol.owner
-}
-
 /**
  * The method is used to calculate the previous offset from the current one to prevent situations when it can calculate
  * [UNDEFINED_OFFSET] from 0 offset and -2 offset from the [UNDEFINED OFFSET]
@@ -1422,4 +1401,4 @@ val Int.previousOffset
             0 -> 0
             -1 -> UNDEFINED_OFFSET
             else -> minus(1)
-        }
+        }

compiler/ir/ir.tree/tree-generator/src/org/jetbrains/kotlin/ir/generator/IrTree.kt

@@ -645,7 +645,6 @@ object IrTree : AbstractTreeBuilder() {
         parent(returnTarget)
 
         +symbol(returnableBlockSymbolType)
-        +field("inlineFunctionSymbol", functionSymbolType, nullable = true)
     }
     val inlinedFunctionBlock: ElementConfig by element(Expression) {
         parent(block)

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

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.backend.konan.lower
 
 import org.jetbrains.kotlin.backend.common.*
+import org.jetbrains.kotlin.backend.common.ir.getAdapteeFromAdaptedForReferenceFunction
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.jvm.ir.erasedUpperBound
 import org.jetbrains.kotlin.backend.konan.NativeGenerationState