JVM IR: Fix inline class mangling for calls to internal functions

...in a different module, e.g., using -Xfriend-paths.

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

@@ -134,7 +134,10 @@ class MethodSignatureMapper(private val context: JvmBackendContext) {
  !isPublishedApi() &&
  !isSyntheticMethodForProperty
  ) {
- return this
+ return originalFunction.takeIf { it != this }
+ ?.safeAs<IrSimpleFunction>()
+ ?.getInternalFunctionForManglingIfNeeded()
+ ?: this
  }
  originalForDefaultAdapter?.getInternalFunctionForManglingIfNeeded()?.let { return it }
  return null

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

@@ -394,12 +394,13 @@ fun IrSimpleType.isRawType(): Boolean =
  hasAnnotation(JvmGeneratorExtensions.RAW_TYPE_ANNOTATION_FQ_NAME)
 
 internal fun classFileContainsMethod(classId: ClassId, function: IrFunction, context: JvmBackendContext): Boolean? {
- val originalDescriptor = context.methodSignatureMapper.mapSignatureWithGeneric(function).asmMethod.descriptor
+ val originalSignature = context.methodSignatureMapper.mapSignatureWithGeneric(function).asmMethod
+ val originalDescriptor = originalSignature.descriptor
  val descriptor = if (function.isSuspend)
  listOf(*Type.getArgumentTypes(originalDescriptor), Type.getObjectType("kotlin/coroutines/Continuation"))
  .joinToString(prefix = "(", postfix = ")", separator = "") + AsmTypes.OBJECT_TYPE
  else originalDescriptor
- return classFileContainsMethod(classId, context.state, Method(function.name.asString(), descriptor))
+ return classFileContainsMethod(classId, context.state, Method(originalSignature.name, descriptor))
 }
 
 val IrFunction.parentClassId: ClassId?

compiler/testData/compileKotlinAgainstKotlin/internalWithInlineClass.kt

@@ -0,0 +1,16 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// FILE: A.kt
+
+package a
+
+inline class Message(val value: String)
+
+class Box {
+ internal fun result(msg: Message): String = msg.value
+}
+
+// FILE: B.kt
+
+fun box(): String {
+ return a.Box().result(a.Message("OK"))
+}