Stop using -sil-serialize-all when building the standard library

We can finally get rid of -sil-serialize-all when building the standard library! This option will be completely eliminated in the future commits.

Instead of serializing just everything as we did before, we now serialize only functions annotated with @_inlineable. This way we can selectively control what needs to be available to the clients. This is an important step towards building a resilient standard library.

While this is a huge change for the serialization of the stdlib, it should be virtually invisible to the clients. For example, there are no noticeable performance regressions on any of the benchmarks.

Author: swiftix

cmake/modules/SwiftSource.cmake

@@ -256,7 +256,8 @@ function(_compile_swift_files
                             "-Xfrontend" "${GROUP_INFO_JSON_FILE}")
     if (NOT SWIFT_STDLIB_ENABLE_RESILIENCE)
       if (SWIFT_STDLIB_SIL_SERIALIZE_ALL)
-        list(APPEND swift_flags "-Xfrontend" "-sil-serialize-all")
+        list(APPEND swift_flags "-Xfrontend" "-sil-serialize-witness-tables"
+                                "-Xfrontend" "-sil-serialize-vtables")
       endif()
     endif()
   endif()

stdlib/CMakeLists.txt

@@ -94,13 +94,18 @@ add_custom_target(swift-test-stdlib ALL
 if(SWIFT_STDLIB_ENABLE_RESILIENCE)
   set(STDLIB_SIL_SERIALIZE_ALL)
   set(STDLIB_SIL_SERIALIZE_WITNESS_TABLES)
+  set(STDLIB_SIL_SERIALIZE_VTABLES)
 else()
   if(SWIFT_STDLIB_SIL_SERIALIZE_ALL)
-    set(STDLIB_SIL_SERIALIZE_ALL "-Xfrontend" "-sil-serialize-all")
+    set(STDLIB_SIL_SERIALIZE_ALL)
     set(STDLIB_SIL_SERIALIZE_WITNESS_TABLES "-Xfrontend" "-sil-serialize-witness-tables")
+    set(STDLIB_SIL_SERIALIZE_VTABLES "-Xfrontend" "-sil-serialize-vtables")
+    list(APPEND STDLIB_SIL_SERIALIZE_ALL ${STDLIB_SIL_SERIALIZE_WITNESS_TABLES}
+                                         ${STDLIB_SIL_SERIALIZE_VTABLES})
   else()
     set(STDLIB_SIL_SERIALIZE_ALL)
     set(STDLIB_SIL_SERIALIZE_WITNESS_TABLES)
+    set(STDLIB_SIL_SERIALIZE_VTABLES)
   endif()
 endif()
 

stdlib/public/SDK/CMakeLists.txt

@@ -9,6 +9,7 @@ if(SWIFT_BUILD_STATIC_SDK_OVERLAY)
 endif()
 
 list(APPEND SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS "${STDLIB_SIL_SERIALIZE_WITNESS_TABLES}")
+list(APPEND SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS "${STDLIB_SIL_SERIALIZE_VTABLES}")
 
 set(all_overlays "Accelerate;AppKit;ARKit;AssetsLibrary;AVFoundation;CallKit;CloudKit;Contacts;CoreAudio;CoreData;CoreFoundation;CoreGraphics;CoreImage;CoreLocation;CoreMedia;CryptoTokenKit;Dispatch;Foundation;GameplayKit;GLKit;HomeKit;IOKit;Intents;MapKit;MediaPlayer;Metal;MetalKit;ModelIO;ObjectiveC;OpenCL;os;Photos;QuartzCore;SafariServices;SceneKit;simd;SpriteKit;UIKit;Vision;WatchKit;XCTest;XPC")