IR: avoid some calls of getUniqId()

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/KotlinIrLinker.kt

@@ -564,14 +564,6 @@ abstract class KotlinIrLinker(
             return null
         }
 
-        val descriptorUniqId = topLevelDescriptor.getUniqId()
-            ?: if (tolerateNonKlibDescriptors) {
-                return null
-            } else {
-                error("Could not get descriptor uniq id for $topLevelDescriptor")
-            }
-        val topLevelKey = UniqId(descriptorUniqId)
-
         val moduleOfOrigin = topLevelDescriptor.module
 
         val moduleDeserializer = deserializersForModules[moduleOfOrigin] ?:
@@ -581,6 +573,14 @@ abstract class KotlinIrLinker(
             error("No module deserializer found for $moduleOfOrigin")
         }
 
+        val descriptorUniqId = topLevelDescriptor.getUniqId()
+            ?: if (tolerateNonKlibDescriptors) {
+                return null
+            } else {
+                error("Could not get descriptor uniq id for $topLevelDescriptor")
+            }
+        val topLevelKey = UniqId(descriptorUniqId)
+
         moduleDeserializer.addModuleReachableTopLevel(topLevelKey)
 
         deserializeAllReachableTopLevels()