Runtimes: allow to link swiftSwiftDirectRuntime

Runtimes/Core/CMakeLists.txt

@@ -109,6 +109,7 @@ defaulted_option(SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT "Add symbols for runtim
 defaulted_option(SwiftCore_ENABLE_STDLIB_TRACING "Enable tracing in the runtime. Assumes the presence of os_log(3) and the os_signpost(3) API.")
 defaulted_option(SwiftCore_ENABLE_CONCURRENCY "Enable Concurrency runtime support")
 defaulted_option(SwiftCore_ENABLE_REMOTE_MIRROR "Enable RemoteMirror runtime support")
+defaulted_option(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release in the runtime/stdlib")
 defaulted_set(SwiftCore_CONCURRENCY_GLOBAL_EXECUTOR STRING "Default Concurrency global executor implementation")
 option(SwiftCore_ENABLE_COMMANDLINE_SUPPORT "Enable command line argument support" ON)
 option(SwiftCore_ENABLE_UNICODE_DATA "Include unicode data in Swift runtimes" ON)
@@ -196,6 +197,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${SwiftCore_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${SwiftCore_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 include(ExperimentalFeatures)
 
 include_directories(include)

Runtimes/Core/Concurrency/CMakeLists.txt

@@ -139,6 +139,7 @@ target_link_libraries(swift_Concurrency PRIVATE
   $<$<PLATFORM_ID:Android>:log>
   $<$<PLATFORM_ID:Windows>:Synchronization>
   $<$<PLATFORM_ID:Windows>:mincore>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>
   # Link to the runtime that we are just building.
   swiftCore)
 set_target_properties(swift_Concurrency PROPERTIES

Runtimes/Core/Core/CMakeLists.txt

@@ -337,6 +337,7 @@ target_link_libraries(swiftCore
     swiftStdlibStubs
     swiftThreading
     $<$<NOT:$<PLATFORM_ID:Darwin>>:swiftrt$<$<PLATFORM_ID:Windows>:T>>
+    $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>
   PUBLIC
     swiftShims
   INTERFACE

Runtimes/Core/SwiftOnoneSupport/CMakeLists.txt

@@ -29,7 +29,8 @@ target_compile_definitions(swiftSwiftOnoneSupport PRIVATE
 target_link_libraries(swiftSwiftOnoneSupport
   PRIVATE
     swiftShims
-    swiftCore)
+    swiftCore
+    $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swiftSwiftOnoneSupport
     EXPORT SwiftCoreTargets

Runtimes/Core/cmake/interface/SwiftCoreConfig.cmake.in

@@ -6,3 +6,5 @@ set(SwiftCore_ENABLE_LIBRARY_EVOLUTION @SwiftCore_ENABLE_LIBRARY_EVOLUTION@)
 set(SwiftCore_ENABLE_VECTOR_TYPES @SwiftCore_ENABLE_VECTOR_TYPES@)
 
 set(SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT @SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT@)
+
+set(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE @SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE@)

Runtimes/Core/cmake/modules/DefaultSettings.cmake

@@ -46,12 +46,15 @@ if(APPLE)
   set(SwiftCore_THREADING_PACKAGE_default "DARWIN")
   set(SwiftCore_ENABLE_PRESPECIALIZATION_default ON)
   set(SwiftCore_CONCURRENCY_GLOBAL_EXECUTOR_default "dispatch")
+  # TODO we are not ready to enable it here
+  set(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE_default OFF)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "WASM")
   set(SwiftCore_OBJECT_FORMAT_default "elf")
   set(SwiftCore_THREADING_PACKAGE_default "NONE")
   set(SwiftCore_ENABLE_CONCURRENCY_default NO)
   set(SwiftCore_ENABLE_REMOTE_MIRROR_default NO)
   set(SwiftCore_CONCURRENCY_GLOBAL_EXECUTOR_default "none")
+  set(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE_default OFF)
 elseif(LINUX OR ANDROID OR BSD)
   set(SwiftCore_OBJECT_FORMAT_default "elf")
 
@@ -66,6 +69,7 @@ elseif(LINUX OR ANDROID OR BSD)
   set(SwiftCore_ENABLE_CONCURRENCY_default NO)
   set(SwiftCore_ENABLE_REMOTE_MIRROR_default NO)
   set(SwiftCore_CONCURRENCY_GLOBAL_EXECUTOR_default "dispatch")
+  set(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE_default OFF)
 elseif(WIN32)
   set(SwiftCore_OBJECT_FORMAT_default "coff")
 
@@ -80,6 +84,7 @@ elseif(WIN32)
   # errors
   set(SwiftCore_ENABLE_PRESPECIALIZATION_default OFF)
   set(SwiftCore_CONCURRENCY_GLOBAL_EXECUTOR_default "dispatch")
+  set(SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE_default OFF)
 
   set(SwiftCore_ENABLE_VECTOR_TYPES_default ON)
   set(SwiftCore_ENABLE_FILESYSTEM_SUPPORT_default ON)

Runtimes/Overlay/CMakeLists.txt

@@ -59,6 +59,8 @@ option(SwiftOverlay_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime lib
   ${SwiftCore_ENABLE_LIBRARY_EVOLUTION})
 option(SwiftOverlay_ENABLE_BACKDEPLOYMENT_SUPPORT "Add symbols for runtime backdeployment"
   ${SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT})
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release in overlays"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
 
 add_compile_definitions(
   $<$<BOOL:${SwiftOverlay_ENABLE_BACKDEPLOYMENT_SUPPORT}>:SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT>)
@@ -74,6 +76,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 include(ExperimentalFeatures)
 
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported

Runtimes/Overlay/Cxx/CMakeLists.txt

@@ -36,6 +36,7 @@ target_compile_options(swiftCxx PRIVATE
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature BuiltinModule>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature Lifetimes>")
 target_link_libraries(swiftCxx PRIVATE
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>
   swiftCore)
 
 install(TARGETS swiftCxx

Runtimes/Overlay/Cxx/std/CMakeLists.txt

@@ -25,6 +25,7 @@ target_compile_options(swiftCxxStdlib PRIVATE
 target_link_libraries(swiftCxxStdlib PRIVATE
   $<$<BOOL:${HAVE___GLIBCXX__}>:libstdcxx>
   $<$<NOT:$<PLATFORM_ID:Darwin>>:cxxshim>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>
   swiftCxx
   swiftCore
   swift_Builtin_float

Runtimes/Overlay/clang/CMakeLists.txt

@@ -12,6 +12,7 @@ target_compile_options(swift_Builtin_float PRIVATE
   $<$<COMPILE_LANGUAGE:Swift>:-autolink-force-load>)
 target_link_libraries(swift_Builtin_float PRIVATE
   $<$<PLATFORM_ID:Windows>:ClangModules>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>
   swiftCore)
 
 install(TARGETS swift_Builtin_float

Runtimes/Supplemental/Differentiation/CMakeLists.txt

@@ -61,6 +61,8 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_VECTOR_TYPES "Enable vector support"
   ${SwiftCore_ENABLE_VECTOR_TYPES})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
 
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
@@ -77,6 +79,11 @@ add_compile_options(
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -target-min-inlining-version -Xfrontend min>"
   $<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>)
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'
@@ -120,7 +127,8 @@ set_target_properties(swift_Differentiation PROPERTIES
 target_link_libraries(swift_Differentiation PRIVATE
   swiftCore
   $<$<PLATFORM_ID:Android>:swiftAndroid>
-  $<$<PLATFORM_ID:Windows>:swiftCRT>)
+  $<$<PLATFORM_ID:Windows>:swiftCRT>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 
 install(TARGETS swift_Differentiation

Runtimes/Supplemental/Distributed/CMakeLists.txt

@@ -65,6 +65,9 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_PRESPECIALIZATION "Enable generic metadata prespecialization"
   ${SwiftCore_ENABLE_PRESPECIALIZATION})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
+
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
   $<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>
@@ -84,6 +87,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'
@@ -146,7 +154,8 @@ target_link_libraries(swiftDistributed PRIVATE
   swift_Concurrency
   swift_Builtin_float
   $<$<PLATFORM_ID:Android>:swiftAndroid>
-  $<$<PLATFORM_ID:Windows>:swiftWinSDK>)
+  $<$<PLATFORM_ID:Windows>:swiftWinSDK>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swiftDistributed
   EXPORT SwiftDistributedTargets

Runtimes/Supplemental/Observation/CMakeLists.txt

@@ -61,6 +61,9 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_PRESPECIALIZATION "Enable generic metadata prespecialization"
   ${SwiftCore_ENABLE_PRESPECIALIZATION})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
+
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
   $<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>
@@ -82,6 +85,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'
@@ -116,7 +124,8 @@ target_link_libraries(swiftObservation PRIVATE
   swift_Concurrency
   $<$<PLATFORM_ID:Android>:swiftAndroid>
   $<$<PLATFORM_ID:Linux>:swiftGlibc>
-  $<$<PLATFORM_ID:Windows>:swiftWinSDK>)
+  $<$<PLATFORM_ID:Windows>:swiftWinSDK>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swiftObservation
   EXPORT SwiftObservationTargets

Runtimes/Supplemental/Runtime/CMakeLists.txt

@@ -68,6 +68,9 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_PRESPECIALIZATION "Enable generic metadata prespecialization"
   ${SwiftCore_ENABLE_PRESPECIALIZATION})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
+
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
   $<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>
@@ -92,6 +95,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'
@@ -157,7 +165,8 @@ target_link_libraries(swiftRuntime PRIVATE
   $<$<PLATFORM_ID:Android>:swiftAndroid>
   $<$<PLATFORM_ID:Darwin>:swiftDarwin>
   $<$<PLATFORM_ID:Linux>:swiftGlibc>
-  $<$<PLATFORM_ID:Windows>:swiftWinSDK>)
+  $<$<PLATFORM_ID:Windows>:swiftWinSDK>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swiftRuntime
   EXPORT SwiftRuntimeTargets

Runtimes/Supplemental/StringProcessing/CMakeLists.txt

@@ -50,6 +50,9 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_PRESPECIALIZATION "Enable generic metadata prespecialization"
   ${SwiftCore_ENABLE_PRESPECIALIZATION})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
+
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
   $<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>
@@ -59,6 +62,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'

Runtimes/Supplemental/StringProcessing/RegexBuilder/CMakeLists.txt

@@ -12,7 +12,8 @@ set_target_properties(swiftRegexBuilder PROPERTIES
 target_link_libraries(swiftRegexBuilder PRIVATE
   swift_RegexParser
   swift_StringProcessing
-  swiftCore)
+  swiftCore
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swiftRegexBuilder
   ARCHIVE DESTINATION "${SwiftStringProcessing_INSTALL_LIBDIR}"

Runtimes/Supplemental/StringProcessing/_RegexParser/CMakeLists.txt

@@ -32,7 +32,8 @@ add_library(swift_RegexParser
   Utility/MissingUnicode.swift)
 
 target_link_libraries(swift_RegexParser PRIVATE
-  swiftCore)
+  swiftCore
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 set_target_properties(swift_RegexParser PROPERTIES
   Swift_MODULE_NAME _RegexParser)

Runtimes/Supplemental/StringProcessing/_StringProcessing/CMakeLists.txt

@@ -77,7 +77,8 @@ set_target_properties(swift_StringProcessing PROPERTIES
 
 target_link_libraries(swift_StringProcessing PRIVATE
     swift_RegexParser
-    swiftCore)
+    swiftCore
+    $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swift_StringProcessing
   ARCHIVE DESTINATION "${SwiftStringProcessing_INSTALL_LIBDIR}"

Runtimes/Supplemental/Synchronization/CMakeLists.txt

@@ -65,6 +65,9 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_PRESPECIALIZATION "Enable generic metadata prespecialization"
   ${SwiftCore_ENABLE_PRESPECIALIZATION})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
+
 option(${PROJECT_NAME}_SINGLE_THREADED_MODE "Build Synchronization assuming it will be used in an environment with only a single thread" OFF)
 
 add_compile_options(
@@ -95,6 +98,11 @@ add_compile_options(
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'
@@ -143,7 +151,8 @@ target_link_libraries(swiftSynchronization PRIVATE
   swiftCore
   $<$<PLATFORM_ID:Android>:swiftAndroid>
   $<$<PLATFORM_ID:Darwin>:swiftDarwin>
-  $<$<PLATFORM_ID:Windows>:ClangModules>)
+  $<$<PLATFORM_ID:Windows>:ClangModules>
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 if(WIN32 AND CMAKE_SYSTEM_PROCESSOR STREQUAL i686)
   # FIXME(#83765) `-whole-module-optimization` should not be needed. However,

Runtimes/Supplemental/Volatile/CMakeLists.txt

@@ -63,13 +63,21 @@ option(${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION "Generate ABI resilient runtime
 option(${PROJECT_NAME}_ENABLE_PRESPECIALIZATION "Enable generic metadata prespecialization"
   ${SwiftCore_ENABLE_PRESPECIALIZATION})
 
+option(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE "Use direct retain release"
+  ${SwiftCore_ENABLE_DIRECT_RETAIN_RELEASE})
+
 add_compile_options(
   $<$<COMPILE_LANGUAGE:Swift>:-explicit-module-build>
   $<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>
   $<$<COMPILE_LANGUAGE:Swift>:-strict-memory-safety>
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_LIBRARY_EVOLUTION}>,$<COMPILE_LANGUAGE:Swift>>:-enable-library-evolution>"
   "$<$<AND:$<BOOL:${${PROJECT_NAME}_ENABLE_PRESPECIALIZATION}>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -prespecialize-generic-metadata>")
 
+if(${PROJECT_NAME}_ENABLE_DIRECT_RETAIN_RELEASE)
+  find_package(SwiftSwiftDirectRuntime REQUIRED)
+  add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -enable-direct-retain-release>")
+endif()
+
 # LNK4049: symbol 'symbol' defined in 'filename.obj' is imported
 # LNK4286: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj'
 # LNK4217: symbol 'symbol' defined in 'filename_1.obj' is imported by 'filename_2.obj' in function 'function'
@@ -88,7 +96,8 @@ set_target_properties(swift_Volatile PROPERTIES
 target_compile_options(swift_Volatile PRIVATE
   -parse-stdlib)
 target_link_libraries(swift_Volatile PRIVATE
-  swiftCore)
+  swiftCore
+  $<$<BOOL:${SwiftSwiftDirectRuntime_FOUND}>:swiftSwiftDirectRuntime>)
 
 install(TARGETS swift_Volatile
   EXPORT SwiftVolatileTargets