JVM IR: Fix inline class constructor ABI (KT-37013, KT-37015)

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

@@ -53,10 +53,15 @@ open class DefaultArgumentStubGenerator(
     }
 
     private fun lower(irFunction: IrFunction): List<IrFunction>? {
-        val visibility = defaultArgumentStubVisibility(irFunction)
         val newIrFunction =
-            irFunction.generateDefaultsFunction(context, skipInlineMethods, skipExternalMethods, forceSetOverrideSymbols, visibility)
-                ?: return null
+            irFunction.generateDefaultsFunction(
+                context,
+                skipInlineMethods,
+                skipExternalMethods,
+                forceSetOverrideSymbols,
+                defaultArgumentStubVisibility(irFunction),
+                useConstructorMarker(irFunction)
+            ) ?: return null
         if (newIrFunction.isFakeOverride) {
             return listOf(irFunction, newIrFunction)
         }
@@ -185,7 +190,8 @@ open class DefaultArgumentStubGenerator(
 
     protected open fun IrBlockBodyBuilder.generateSuperCallHandlerCheckIfNeeded(
         irFunction: IrFunction,
-        newIrFunction: IrFunction) {
+        newIrFunction: IrFunction
+    ) {
         //NO-OP Stub
     }
 
@@ -202,6 +208,8 @@ open class DefaultArgumentStubGenerator(
 
     protected open fun defaultArgumentStubVisibility(function: IrFunction) = Visibilities.PUBLIC
 
+    protected open fun useConstructorMarker(function: IrFunction) = function is IrConstructor
+
     private fun log(msg: () -> String) = context.log { "DEFAULT-REPLACER: ${msg()}" }
 }
 
@@ -310,15 +318,20 @@ open class DefaultParameterInjector(
         val startOffset = expression.startOffset
         val endOffset = expression.endOffset
         val declaration = expression.symbol.owner
-        val visibility = defaultArgumentStubVisibility(declaration)
 
         // We *have* to find the actual function here since on the JVM, a default stub for a function implemented
         // in an interface does not leave an abstract method after being moved to DefaultImpls (see InterfaceLowering).
         // Calling the fake override on an implementation of that interface would then result in a call to a method
         // that does not actually exist as DefaultImpls is not part of the inheritance hierarchy.
         val stubFunction = declaration.findBaseFunctionWithDefaultArguments(skipInline, skipExternalMethods)
-            ?.generateDefaultsFunction(context, skipInline, skipExternalMethods, forceSetOverrideSymbols, visibility)
-            ?: return null
+            ?.generateDefaultsFunction(
+                context,
+                skipInline,
+                skipExternalMethods,
+                forceSetOverrideSymbols,
+                defaultArgumentStubVisibility(declaration),
+                useConstructorMarker(declaration)
+            ) ?: return null
 
         log { "$declaration -> $stubFunction" }
 
@@ -367,6 +380,8 @@ open class DefaultParameterInjector(
 
     protected open fun defaultArgumentStubVisibility(function: IrFunction) = Visibilities.PUBLIC
 
+    protected open fun useConstructorMarker(function: IrFunction) = function is IrConstructor
+
     private fun log(msg: () -> String) = context.log { "DEFAULT-INJECTOR: ${msg()}" }
 }
 
@@ -416,7 +431,8 @@ private fun IrFunction.generateDefaultsFunction(
     skipInlineMethods: Boolean,
     skipExternalMethods: Boolean,
     forceSetOverrideSymbols: Boolean,
-    visibility: Visibility
+    visibility: Visibility,
+    useConstructorMarker: Boolean
 ): IrFunction? {
     if (skipInlineMethods && isInline) return null
     if (skipExternalMethods && isExternalOrInheritedFromExternal()) return null
@@ -425,7 +441,7 @@ private fun IrFunction.generateDefaultsFunction(
     if (this is IrSimpleFunction) {
         // If this is an override of a function with default arguments, produce a fake override of a default stub.
         if (overriddenSymbols.any { it.owner.findBaseFunctionWithDefaultArguments(skipInlineMethods, skipExternalMethods) != null })
-            return generateDefaultsFunctionImpl(context, IrDeclarationOrigin.FAKE_OVERRIDE, visibility, isFakeOverride = true).also {
+            return generateDefaultsFunctionImpl(context, IrDeclarationOrigin.FAKE_OVERRIDE, visibility, true, useConstructorMarker).also {
                 context.mapping.defaultArgumentsDispatchFunction[this] = it
                 context.mapping.defaultArgumentsOriginalFunction[it] = this
 
@@ -436,7 +452,8 @@ private fun IrFunction.generateDefaultsFunction(
                             skipInlineMethods,
                             skipExternalMethods,
                             forceSetOverrideSymbols,
-                            visibility
+                            visibility,
+                            useConstructorMarker
                         )?.symbol as IrSimpleFunctionSymbol?
                     }
                 }
@@ -454,7 +471,7 @@ private fun IrFunction.generateDefaultsFunction(
     // binaries, it's way too late to fix it. Hence the workaround.
     if (valueParameters.any { it.defaultValue != null }) {
         return generateDefaultsFunctionImpl(
-            context, IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER, visibility, isFakeOverride = false
+            context, IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER, visibility, false, useConstructorMarker
         ).also {
             context.mapping.defaultArgumentsDispatchFunction[this] = it
             context.mapping.defaultArgumentsOriginalFunction[it] = this
@@ -467,7 +484,8 @@ private fun IrFunction.generateDefaultsFunctionImpl(
     context: CommonBackendContext,
     newOrigin: IrDeclarationOrigin,
     newVisibility: Visibility,
-    isFakeOverride: Boolean
+    isFakeOverride: Boolean,
+    useConstructorMarker: Boolean
 ): IrFunction {
     val newFunction = when (this) {
         is IrConstructor ->
@@ -515,7 +533,7 @@ private fun IrFunction.generateDefaultsFunctionImpl(
     for (i in 0 until (valueParameters.size + 31) / 32) {
         newFunction.addValueParameter("mask$i".synthesizedString, context.irBuiltIns.intType, IrDeclarationOrigin.MASK_FOR_DEFAULT_FUNCTION)
     }
-    if (this is IrConstructor) {
+    if (useConstructorMarker) {
         val markerType = context.ir.symbols.defaultConstructorMarker.defaultType.makeNullable()
         newFunction.addValueParameter("marker".synthesizedString, markerType, IrDeclarationOrigin.DEFAULT_CONSTRUCTOR_MARKER)
     } else if (context.ir.shouldGenerateHandlerParameterForDefaultBodyFun()) {

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/DeclarationOrigins.kt

@@ -31,6 +31,7 @@ interface JvmLoweredDeclarationOrigin : IrDeclarationOrigin {
     object SYNTHETIC_INLINE_CLASS_MEMBER : IrDeclarationOriginImpl("SYNTHETIC_INLINE_CLASS_MEMBER", isSynthetic = true)
     object INLINE_CLASS_GENERATED_IMPL_METHOD : IrDeclarationOriginImpl("INLINE_CLASS_GENERATED_IMPL_METHOD")
     object STATIC_INLINE_CLASS_REPLACEMENT : IrDeclarationOriginImpl("STATIC_INLINE_CLASS_REPLACEMENT")
+    object STATIC_INLINE_CLASS_CONSTRUCTOR : IrDeclarationOriginImpl("STATIC_INLINE_CLASS_CONSTRUCTOR")
     object GENERATED_ASSERTION_ENABLED_FIELD : IrDeclarationOriginImpl("GENERATED_ASSERTION_ENABLED_FIELD", isSynthetic = true)
     object GENERATED_EXTENDED_MAIN : IrDeclarationOriginImpl("GENERATED_EXTENDED_MAIN", isSynthetic = true)
     object SUSPEND_IMPL_STATIC_FUNCTION : IrDeclarationOriginImpl("SUSPEND_IMPL_STATIC_FUNCTION", isSynthetic = true)

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/CoroutineCodegen.kt

@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.backend.common.lower.LocalDeclarationsLowering
 import org.jetbrains.kotlin.backend.common.lower.allOverridden
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
 import org.jetbrains.kotlin.backend.jvm.lower.suspendFunctionOriginal
 import org.jetbrains.kotlin.codegen.ClassBuilder
 import org.jetbrains.kotlin.codegen.coroutines.CoroutineTransformerMethodVisitor
@@ -119,9 +120,9 @@ private fun IrFunction.isBridgeToSuspendImplMethod(): Boolean =
     }
 
 private fun IrFunction.isStaticInlineClassReplacementDelegatingCall(): Boolean =
-    this is IrAttributeContainer && origin != JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_REPLACEMENT &&
+    this is IrAttributeContainer && !isStaticInlineClassReplacement &&
             parentAsClass.declarations.find { it is IrAttributeContainer && it.attributeOwnerId == attributeOwnerId && it !== this }
-                ?.origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_REPLACEMENT
+                ?.isStaticInlineClassReplacement == true
 
 internal fun IrFunction.shouldContainSuspendMarkers(): Boolean = !isInvokeSuspendOfContinuation() &&
         // These are tail-call bridges and do not require any bytecode modifications.

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/MethodSignatureMapper.kt

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.ir.getJvmNameFromAnnotation
 import org.jetbrains.kotlin.backend.jvm.ir.isCompiledToJvmDefault
+import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
 import org.jetbrains.kotlin.backend.jvm.ir.propertyIfAccessor
 import org.jetbrains.kotlin.backend.jvm.lower.suspendFunctionOriginal
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
@@ -35,7 +36,10 @@ import org.jetbrains.kotlin.ir.expressions.IrFunctionAccessExpression
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.load.java.*
-import org.jetbrains.kotlin.load.kotlin.*
+import org.jetbrains.kotlin.load.kotlin.JvmPackagePartSource
+import org.jetbrains.kotlin.load.kotlin.TypeMappingMode
+import org.jetbrains.kotlin.load.kotlin.forceSingleValueParameterBoxing
+import org.jetbrains.kotlin.load.kotlin.signatures
 import org.jetbrains.kotlin.metadata.deserialization.getExtensionOrNull
 import org.jetbrains.kotlin.metadata.jvm.JvmProtoBuf
 import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmProtoBufUtil
@@ -314,7 +318,7 @@ class MethodSignatureMapper(private val context: JvmBackendContext) {
         // remapped name or signature and forward to the actually declared method.
         if (caller.origin == IrDeclarationOrigin.BRIDGE || caller.origin == IrDeclarationOrigin.BRIDGE_SPECIAL) return null
         // Do not remap calls to static replacements of inline class methods, since they have completely different signatures.
-        if (callee.origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_REPLACEMENT) return null
+        if (callee.isStaticInlineClassReplacement) return null
         val overriddenSpecialBuiltinFunction = callee.descriptor.original.getOverriddenBuiltinReflectingJvmDescriptor()
         if (overriddenSpecialBuiltinFunction != null && !superCall) {
             return mapSignatureSkipGeneric(context.referenceFunction(overriddenSpecialBuiltinFunction.original).owner)

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

@@ -343,3 +343,7 @@ fun IrProperty.needsAccessor(accessor: IrSimpleFunction): Boolean = when {
     // We do not produce default accessors for private fields
     else -> accessor.origin != IrDeclarationOrigin.DEFAULT_PROPERTY_ACCESSOR || !Visibilities.isPrivate(accessor.visibility)
 }
+
+val IrDeclaration.isStaticInlineClassReplacement: Boolean
+    get() = origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_REPLACEMENT
+            || origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_CONSTRUCTOR

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AddContinuationLowering.kt

@@ -15,6 +15,7 @@ import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.*
 import org.jetbrains.kotlin.backend.jvm.ir.IrInlineReferenceLocator
 import org.jetbrains.kotlin.backend.jvm.ir.defaultValue
+import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
 import org.jetbrains.kotlin.backend.jvm.localDeclarationsPhase
 import org.jetbrains.kotlin.codegen.coroutines.*
 import org.jetbrains.kotlin.codegen.inline.coroutines.FOR_INLINE_SUFFIX
@@ -640,7 +641,7 @@ private fun IrFunction.suspendFunctionViewOrStub(context: JvmBackendContext): Ir
 }
 
 internal fun IrFunction.suspendFunctionOriginal(): IrFunction =
-    if (this is IrSimpleFunction && isSuspend && origin != JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_REPLACEMENT)
+    if (this is IrSimpleFunction && isSuspend && !isStaticInlineClassReplacement)
         attributeOwnerId as IrFunction
     else this
 

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmDefaultArgumentStubGenerator.kt

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.backend.common.lower.irIfThen
 import org.jetbrains.kotlin.backend.common.lower.irNot
 import org.jetbrains.kotlin.backend.common.lower.irThrow
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
+import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.ir.getJvmVisibilityOfDefaultArgumentStub
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
@@ -48,6 +49,9 @@ class JvmDefaultArgumentStubGenerator(override val context: JvmBackendContext) :
 
     override fun defaultArgumentStubVisibility(function: IrFunction) = function.getJvmVisibilityOfDefaultArgumentStub()
 
+    override fun useConstructorMarker(function: IrFunction): Boolean =
+        function is IrConstructor || function.origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_CONSTRUCTOR
+
     override fun IrBlockBodyBuilder.generateSuperCallHandlerCheckIfNeeded(
         irFunction: IrFunction,
         newIrFunction: IrFunction

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmDefaultParameterInjector.kt

@@ -7,8 +7,10 @@ package org.jetbrains.kotlin.backend.jvm.lower
 
 import org.jetbrains.kotlin.backend.common.lower.DefaultParameterInjector
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
+import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.ir.defaultValue
 import org.jetbrains.kotlin.backend.jvm.ir.getJvmVisibilityOfDefaultArgumentStub
+import org.jetbrains.kotlin.ir.declarations.IrConstructor
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrValueParameter
 import org.jetbrains.kotlin.ir.expressions.IrExpression
@@ -27,4 +29,7 @@ class JvmDefaultParameterInjector(context: JvmBackendContext) :
     }
 
     override fun defaultArgumentStubVisibility(function: IrFunction) = function.getJvmVisibilityOfDefaultArgumentStub()
+
+    override fun useConstructorMarker(function: IrFunction): Boolean =
+        function is IrConstructor || function.origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_CONSTRUCTOR
 }

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/MemoizedInlineClassReplacements.kt

@@ -10,8 +10,10 @@ import org.jetbrains.kotlin.backend.common.ir.copyTypeParameters
 import org.jetbrains.kotlin.backend.common.ir.copyTypeParametersFrom
 import org.jetbrains.kotlin.backend.common.ir.createDispatchReceiverParameter
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
 import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi.mangledNameFor
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper
+import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.builders.declarations.addValueParameter
 import org.jetbrains.kotlin.ir.builders.declarations.buildFun
 import org.jetbrains.kotlin.ir.builders.declarations.buildFunWithDescriptorForInlining
@@ -45,7 +47,7 @@ class MemoizedInlineClassReplacements(private val mangleReturnTypes: Boolean) {
                 // Don't mangle anonymous or synthetic functions
                 it.origin == IrDeclarationOrigin.LOCAL_FUNCTION_FOR_LAMBDA ||
                         it.origin == IrDeclarationOrigin.DELEGATED_PROPERTY_ACCESSOR ||
-                        it.origin == JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_REPLACEMENT ||
+                        it.isStaticInlineClassReplacement ||
                         it.origin.isSynthetic ||
                         it.isInlineClassFieldGetter -> null
 
@@ -181,10 +183,17 @@ class MemoizedInlineClassReplacements(private val mangleReturnTypes: Boolean) {
         body: IrFunctionImpl.() -> Unit
     ) = buildFunWithDescriptorForInlining(function.descriptor) {
         updateFrom(function)
-        origin = if (function.origin == IrDeclarationOrigin.GENERATED_INLINE_CLASS_MEMBER) {
-            JvmLoweredDeclarationOrigin.INLINE_CLASS_GENERATED_IMPL_METHOD
-        } else {
-            replacementOrigin
+        if (function is IrConstructor) {
+            // The [updateFrom] call will set the modality to FINAL for constructors, while the JVM backend would use OPEN here.
+            modality = Modality.OPEN
+        }
+        origin = when {
+            function.origin == IrDeclarationOrigin.GENERATED_INLINE_CLASS_MEMBER ->
+                JvmLoweredDeclarationOrigin.INLINE_CLASS_GENERATED_IMPL_METHOD
+            function is IrConstructor && function.constructedClass.isInline ->
+                JvmLoweredDeclarationOrigin.STATIC_INLINE_CLASS_CONSTRUCTOR
+            else ->
+                replacementOrigin
         }
         if (noFakeOverride) {
             isFakeOverride = false

compiler/testData/codegen/bytecodeText/constructors/inlinePrimaryDefaults.kt

@@ -1,13 +1,10 @@
+// !LANGUAGE: +InlineClasses
+// This tests both KT-37013 and KT-37015.
+
 inline class A(val x: Int = 0)
 
 // 0 <init>\(\)V
 // 1 private synthetic <init>\(I\)V
 // 1 public final static synthetic box-impl\(I\)LA;
-
-// JVM_TEMPLATES
 // 1 public static constructor-impl\(I\)I
 // 1 public static synthetic constructor-impl\$default\(IILkotlin/jvm/internal/DefaultConstructorMarker;\)I
-
-// JVM_IR_TEMPLATES
-// 1 public final static constructor-impl\(I\)I
-// 1 public static synthetic constructor-impl\$default\(IILjava/lang/Object;\)I