[FIR2IR] Consider isExpect flag for generated synthetic functions

It's actual for value classes

^KT-51969 Fixed

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DataClassMembersGenerator.kt

@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.fir.declarations.FirSimpleFunction
 import org.jetbrains.kotlin.fir.declarations.builder.buildSimpleFunction
 import org.jetbrains.kotlin.fir.declarations.builder.buildValueParameter
 import org.jetbrains.kotlin.fir.declarations.impl.FirDeclarationStatusImpl
+import org.jetbrains.kotlin.fir.declarations.utils.isExpect
 import org.jetbrains.kotlin.fir.declarations.utils.modality
 import org.jetbrains.kotlin.fir.moduleData
 import org.jetbrains.kotlin.fir.scopes.unsubstitutedScope
@@ -218,6 +219,7 @@ class DataClassMembersGenerator(val components: Fir2IrComponents) : Fir2IrCompon
                 val equalsFunction = createSyntheticIrFunction(
                     EQUALS,
                     components.irBuiltIns.booleanType,
+                    isExpect = klass.isExpect,
                     otherParameterNeeded = true
                 )
                 irDataClassMembersGenerator.generateEqualsMethod(equalsFunction, properties)
@@ -230,6 +232,7 @@ class DataClassMembersGenerator(val components: Fir2IrComponents) : Fir2IrCompon
                 val hashCodeFunction = createSyntheticIrFunction(
                     HASHCODE_NAME,
                     components.irBuiltIns.intType,
+                    isExpect = klass.isExpect
                 )
                 irDataClassMembersGenerator.generateHashCodeMethod(hashCodeFunction, properties)
                 irClass.declarations.add(hashCodeFunction)
@@ -241,6 +244,7 @@ class DataClassMembersGenerator(val components: Fir2IrComponents) : Fir2IrCompon
                 val toStringFunction = createSyntheticIrFunction(
                     TO_STRING,
                     components.irBuiltIns.stringType,
+                    isExpect = klass.isExpect
                 )
                 irDataClassMembersGenerator.generateToStringMethod(toStringFunction, properties)
                 irClass.declarations.add(toStringFunction)
@@ -262,6 +266,7 @@ class DataClassMembersGenerator(val components: Fir2IrComponents) : Fir2IrCompon
         private fun createSyntheticIrFunction(
             name: Name,
             returnType: IrType,
+            isExpect: Boolean,
             otherParameterNeeded: Boolean = false
         ): IrFunction {
             val functionSymbol = FirNamedFunctionSymbol(CallableId(lookupTag.classId, name))
@@ -269,7 +274,7 @@ class DataClassMembersGenerator(val components: Fir2IrComponents) : Fir2IrCompon
                 origin = FirDeclarationOrigin.Synthetic
                 this.name = name
                 this.symbol = functionSymbol
-                this.status = FirDeclarationStatusImpl(Visibilities.Public, Modality.FINAL)
+                this.status = FirDeclarationStatusImpl(Visibilities.Public, Modality.FINAL).also { it.isExpect = isExpect }
                 moduleData = components.session.moduleData
                 this.returnTypeRef = when (returnType) {
                     components.irBuiltIns.booleanType -> FirImplicitBooleanTypeRef(null)

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -33129,6 +33129,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             public void testKt_56329() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/multiModule/kt-56329.kt");
             }
+
+            @Test
+            @TestMetadata("valueClasses.kt")
+            public void testValueClasses() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/multiModule/valueClasses.kt");
+            }
         }
     }
 

compiler/testData/codegen/box/multiplatform/multiModule/valueClasses.kt

@@ -0,0 +1,19 @@
+// ISSUE: KT-51969
+// !LANGUAGE: +MultiPlatformProjects
+// TARGET_BACKEND: JVM_IR
+// WITH_STDLIB
+
+// MODULE: common
+// TARGET_PLATFORM: Common
+// FILE: expect.kt
+
+expect value class ExpectValue(val x: String)
+
+// MODULE: main()()(common)
+// TARGET_PLATFORM: JVM
+// FILE: actual.kt
+
+@JvmInline
+actual value class ExpectValue actual constructor(actual val x: String)
+
+fun box() = ExpectValue("OK").x

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java

@@ -33129,6 +33129,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             public void testKt_56329() throws Exception {
                 runTest("compiler/testData/codegen/box/multiplatform/multiModule/kt-56329.kt");
             }
+
+            @Test
+            @TestMetadata("valueClasses.kt")
+            public void testValueClasses() throws Exception {
+                runTest("compiler/testData/codegen/box/multiplatform/multiModule/valueClasses.kt");
+            }
         }
     }