Minor: move "is box/unbox method" to InlineClassDescriptorResolver

compiler/backend/src/org/jetbrains/kotlin/codegen/state/inlineClassManglingUtils.kt

@@ -9,7 +9,7 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.load.kotlin.getRepresentativeUpperBound
 import org.jetbrains.kotlin.resolve.DescriptorUtils.RESULT_FQ_NAME
 import org.jetbrains.kotlin.resolve.DescriptorUtils.SUCCESS_OR_FAILURE_FQ_NAME
-import org.jetbrains.kotlin.resolve.InlineClassDescriptorResolver.BOX_METHOD_NAME
+import org.jetbrains.kotlin.resolve.InlineClassDescriptorResolver
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
 import org.jetbrains.kotlin.resolve.isInlineClassType
@@ -19,7 +19,7 @@ import java.security.MessageDigest
 fun getInlineClassValueParametersManglingSuffix(descriptor: CallableMemberDescriptor): String? {
     if (descriptor !is FunctionDescriptor) return null
     if (descriptor is ConstructorDescriptor) return null
-    if (descriptor.isSynthesizedBoxMethod()) return null
+    if (InlineClassDescriptorResolver.isSynthesizedBoxMethod(descriptor)) return null
 
     val actualValueParameterTypes = listOfNotNull(descriptor.extensionReceiverParameter?.type) + descriptor.valueParameters.map { it.type }
 
@@ -42,11 +42,6 @@ private fun KotlinType.isTypeParameterWithUpperBoundThatRequiresMangling(): Bool
     return getRepresentativeUpperBound(descriptor).requiresFunctionNameMangling()
 }
 
-private fun FunctionDescriptor.isSynthesizedBoxMethod() =
-    kind == CallableMemberDescriptor.Kind.SYNTHESIZED &&
-            containingDeclaration.let { it is ClassDescriptor && it.isInline } &&
-            name == BOX_METHOD_NAME
-
 private fun collectSignatureForMangling(types: List<KotlinType>) =
     types.joinToString { getSignatureElementForMangling(it) }
 

compiler/frontend/src/org/jetbrains/kotlin/resolve/InlineClassDescriptorResolver.kt

@@ -33,6 +33,19 @@ object InlineClassDescriptorResolver {
     fun createUnboxFunctionDescriptor(owner: ClassDescriptor): SimpleFunctionDescriptor? =
         createConversionFunctionDescriptor(false, owner)
 
+    @JvmStatic
+    fun isSynthesizedBoxMethod(descriptor: FunctionDescriptor) =
+        isSynthesizedInlineClassMethod(descriptor, BOX_METHOD_NAME)
+
+    @JvmStatic
+    fun isSynthesizedUnboxMethod(descriptor: FunctionDescriptor) =
+        isSynthesizedInlineClassMethod(descriptor, UNBOX_METHOD_NAME)
+
+    private fun isSynthesizedInlineClassMethod(descriptor: FunctionDescriptor, name: Name) =
+        descriptor.kind == CallableMemberDescriptor.Kind.SYNTHESIZED &&
+                descriptor.containingDeclaration.isInlineClass() &&
+                descriptor.name == name
+
     fun createSpecializedEqualsDescriptor(owner: ClassDescriptor): SimpleFunctionDescriptor? {
         val inlinedValue = owner.underlyingRepresentation() ?: return null