[6.2] Cherry-pick recent CompatibilitySpan work

Runtimes/Core/cmake/modules/AvailabilityMacros.cmake

@@ -1,4 +1,7 @@
-file(STRINGS "${SwiftCore_SWIFTC_SOURCE_DIR}/utils/availability-macros.def" availability_defs)
+configure_file("${SwiftCore_SWIFTC_SOURCE_DIR}/utils/availability-macros.def"
+               "${CMAKE_CURRENT_BINARY_DIR}/availability-macros.def"
+               COPYONLY)
+file(STRINGS "${CMAKE_CURRENT_BINARY_DIR}/availability-macros.def" availability_defs)
 list(FILTER availability_defs EXCLUDE REGEX "^\\s*(#.*)?$")
 foreach(def ${availability_defs})
   add_compile_options("$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -define-availability -Xfrontend \"${def}\">")

Runtimes/Core/core/CMakeLists.txt

@@ -301,7 +301,8 @@ target_compile_options(swiftCore PRIVATE
   $<$<COMPILE_LANGUAGE:Swift>:-nostdimport>
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -group-info-path -Xfrontend ${CMAKE_CURRENT_SOURCE_DIR}/GroupInfo.json>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -disable-objc-attr-requires-foundation-module>"
-  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -require-explicit-availability=ignore>")
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-Xfrontend -require-explicit-availability=ignore>"
+  "$<$<AND:$<PLATFORM_ID:Darwin>,$<COMPILE_LANGUAGE:Swift>>:SHELL:-Xfrontend -previous-module-installname-map-file -Xfrontend ${CMAKE_CURRENT_SOURCE_DIR}/PreviousModuleInstallName.json>")
 if(NOT "${CMAKE_BUILD_TYPE}" STREQUAL "MinSizeRel")
   # Using these in MinSizeRel would result in a 15% increase in the binary size
   target_compile_options(swiftCore PRIVATE

include/swift/AST/RuntimeVersions.def

@@ -152,7 +152,10 @@ RUNTIME_VERSION(
 
 RUNTIME_VERSION(
   (6, 1),
-  FUTURE
+  PLATFORM(macOS,   (15, 4, 0))
+  PLATFORM(iOS,     (18, 4, 0))
+  PLATFORM(watchOS, (11, 4, 0))
+  PLATFORM(visionOS,(2, 4, 0))
 )
 
 RUNTIME_VERSION(

stdlib/cmake/modules/AddSwiftStdlib.cmake

@@ -721,6 +721,8 @@ endfunction()
 #     [DONT_EMBED_BITCODE]
 #     [IS_STDLIB]
 #     [IS_STDLIB_CORE]
+#     [ONLY_SWIFTMODULE]
+#     [NO_SWIFTMODULE]
 #     [IS_SDK_OVERLAY]
 #     [IS_FRAGILE]
 #     INSTALL_IN_COMPONENT comp
@@ -742,9 +744,6 @@ endfunction()
 # STATIC
 #   Build a static library.
 #
-# ONLY_SWIFTMODULE
-#   Do not build either static or shared, build just the .swiftmodule.
-#
 # SDK sdk
 #   SDK to build for.
 #
@@ -784,6 +783,12 @@ endfunction()
 # IS_STDLIB_CORE
 #   Compile as the standard library core.
 #
+# ONLY_SWIFTMODULE
+#   Do not build either static or shared, build just the .swiftmodule.
+#
+# NO_SWIFTMODULE
+#   Only build either static or shared, and skip the .swiftmodule.
+#
 # IS_SDK_OVERLAY
 #   Treat the library as a part of the Swift SDK overlay.
 #
@@ -811,6 +816,7 @@ function(add_swift_target_library_single target name)
         SHARED
         STATIC
         ONLY_SWIFTMODULE
+        NO_SWIFTMODULE
         NO_LINK_NAME
         INSTALL_WITH_SHARED
         IS_FRAGILE)
@@ -1032,6 +1038,7 @@ function(add_swift_target_library_single target name)
       ${SWIFTLIB_SINGLE_IS_SDK_OVERLAY_keyword}
       ${SWIFTLIB_SINGLE_IS_FRAGILE_keyword}
       ${SWIFTLIB_SINGLE_ONLY_SWIFTMODULE_keyword}
+      ${SWIFTLIB_SINGLE_NO_SWIFTMODULE_keyword}
       ${embed_bitcode_arg}
       ${SWIFTLIB_SINGLE_STATIC_keyword}
       ${SWIFTLIB_SINGLE_NO_LINK_NAME_keyword}
@@ -1683,6 +1690,8 @@ endfunction()
 #     [INSTALL]
 #     [IS_STDLIB]
 #     [IS_STDLIB_CORE]
+#     [ONLY_SWIFTMODULE]
+#     [NO_SWIFTMODULE]
 #     [INSTALL_WITH_SHARED]
 #     INSTALL_IN_COMPONENT comp
 #     DEPLOYMENT_VERSION_OSX version
@@ -1791,6 +1800,12 @@ endfunction()
 # IS_STDLIB_CORE
 #   Compile as the Swift standard library core.
 #
+# ONLY_SWIFTMODULE
+#   Do not build either static or shared, build just the .swiftmodule.
+#
+# NO_SWIFTMODULE
+#   Only build either static or shared, and skip the .swiftmodule.
+#
 # IS_SDK_OVERLAY
 #   Treat the library as a part of the Swift SDK overlay.
 #
@@ -1879,6 +1894,8 @@ function(add_swift_target_library name)
         IS_STDLIB_CORE
         IS_SWIFT_ONLY
         NOSWIFTRT
+        ONLY_SWIFTMODULE
+        NO_SWIFTMODULE
         OBJECT_LIBRARY
         SHARED
         STATIC
@@ -2490,6 +2507,8 @@ function(add_swift_target_library name)
         ${SWIFTLIB_IS_STDLIB_CORE_keyword}
         ${SWIFTLIB_IS_SDK_OVERLAY_keyword}
         ${SWIFTLIB_NOSWIFTRT_keyword}
+        ${SWIFTLIB_ONLY_SWIFTMODULE_keyword}
+        ${SWIFTLIB_NO_SWIFTMODULE_keyword}
         DARWIN_INSTALL_NAME_DIR "${SWIFTLIB_DARWIN_INSTALL_NAME_DIR}"
         INSTALL_IN_COMPONENT "${SWIFTLIB_INSTALL_IN_COMPONENT}"
         DEPLOYMENT_VERSION_OSX "${SWIFTLIB_DEPLOYMENT_VERSION_OSX}"

stdlib/cmake/modules/SwiftSource.cmake

@@ -49,7 +49,7 @@ function(handle_swift_sources
     dependency_sibgen_target_out_var_name
     sourcesvar externalvar name)
   cmake_parse_arguments(SWIFTSOURCES
-      "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;NO_LINK_NAME;IS_FRAGILE;ONLY_SWIFTMODULE"
+      "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;NO_LINK_NAME;IS_FRAGILE;ONLY_SWIFTMODULE;NO_SWIFTMODULE"
       "SDK;ARCHITECTURE;INSTALL_IN_COMPONENT;DEPLOYMENT_VERSION_OSX;DEPLOYMENT_VERSION_IOS;DEPLOYMENT_VERSION_TVOS;DEPLOYMENT_VERSION_WATCHOS;MACCATALYST_BUILD_FLAVOR;BOOTSTRAPPING;INSTALL_BINARY_SWIFTMODULE"
       "DEPENDS;COMPILE_FLAGS;MODULE_NAME;MODULE_DIR;ENABLE_LTO"
       ${ARGN})
@@ -66,6 +66,7 @@ function(handle_swift_sources
   translate_flag(${SWIFTSOURCES_NO_LINK_NAME} "NO_LINK_NAME" NO_LINK_NAME_arg)
   translate_flag(${SWIFTSOURCES_IS_FRAGILE} "IS_FRAGILE" IS_FRAGILE_arg)
   translate_flag(${SWIFTSOURCES_ONLY_SWIFTMODULE} "ONLY_SWIFTMODULE" ONLY_SWIFTMODULE_arg)
+  translate_flag(${SWIFTSOURCES_NO_SWIFTMODULE} "NO_SWIFTMODULE" NO_SWIFTMODULE_arg)
   if(DEFINED SWIFTSOURCES_BOOTSTRAPPING)
     set(BOOTSTRAPPING_arg "BOOTSTRAPPING" ${SWIFTSOURCES_BOOTSTRAPPING})
   endif()
@@ -161,6 +162,7 @@ function(handle_swift_sources
         ${BOOTSTRAPPING_arg}
         ${IS_FRAGILE_arg}
         ${ONLY_SWIFTMODULE_arg}
+        ${NO_SWIFTMODULE_arg}
         INSTALL_BINARY_SWIFTMODULE ${SWIFTSOURCES_INSTALL_BINARY_SWIFTMODULE}
         INSTALL_IN_COMPONENT "${SWIFTSOURCES_INSTALL_IN_COMPONENT}"
         DEPLOYMENT_VERSION_OSX ${SWIFTSOURCES_DEPLOYMENT_VERSION_OSX}
@@ -405,6 +407,8 @@ endfunction()
 #     [IS_MAIN]                         # This is an executable, not a library
 #     [IS_STDLIB]
 #     [IS_STDLIB_CORE]                  # This is the core standard library
+#     [ONLY_SWIFTMODULE]                # Emit swiftmodule only, no binary
+#     [NO_SWIFTMODULE]                  # Emit binary only, no swiftmodule
 #     [OPT_FLAGS]                       # Optimization flags (overrides SWIFT_OPTIMIZE)
 #     [MODULE_DIR]                      # Put .swiftmodule, .swiftdoc., and .o
 #                                       # into this directory.
@@ -419,7 +423,7 @@ function(_compile_swift_files
     dependency_sib_target_out_var_name dependency_sibopt_target_out_var_name
     dependency_sibgen_target_out_var_name)
   cmake_parse_arguments(SWIFTFILE
-    "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;IS_FRAGILE;ONLY_SWIFTMODULE"
+    "IS_MAIN;IS_STDLIB;IS_STDLIB_CORE;IS_SDK_OVERLAY;EMBED_BITCODE;STATIC;IS_FRAGILE;ONLY_SWIFTMODULE;NO_SWIFTMODULE"
     "OUTPUT;MODULE_NAME;INSTALL_IN_COMPONENT;DEPLOYMENT_VERSION_OSX;DEPLOYMENT_VERSION_IOS;DEPLOYMENT_VERSION_TVOS;DEPLOYMENT_VERSION_WATCHOS;MACCATALYST_BUILD_FLAVOR;BOOTSTRAPPING;INSTALL_BINARY_SWIFTMODULE"
     "SOURCES;FLAGS;DEPENDS;SDK;ARCHITECTURE;OPT_FLAGS;MODULE_DIR"
     ${ARGN})
@@ -678,6 +682,10 @@ function(_compile_swift_files
   get_bootstrapping_path(lib_dir ${SWIFTLIB_DIR} "${SWIFTFILE_BOOTSTRAPPING}")
 
   if(NOT SWIFTFILE_IS_MAIN)
+    list(APPEND swift_flags "-parse-as-library")
+  endif()
+
+  if(NOT SWIFTFILE_IS_MAIN AND NOT SWIFTFILE_NO_SWIFTMODULE)
     # Determine the directory where the module file should be placed.
     if(SWIFTFILE_MODULE_DIR)
       set(module_dir "${SWIFTFILE_MODULE_DIR}")
@@ -687,8 +695,6 @@ function(_compile_swift_files
       message(FATAL_ERROR "Don't know where to put the module files")
     endif()
 
-    list(APPEND swift_flags "-parse-as-library")
-
     set(module_base "${module_dir}/${SWIFTFILE_MODULE_NAME}")
 
     set(module_dir_static "${SWIFTSTATICLIB_DIR}/${library_subdir}")
@@ -1068,7 +1074,7 @@ function(_compile_swift_files
   #
   # We only build these when we are not producing a main file. We could do this
   # with sib/sibgen, but it is useful for looking at the stdlib.
-  if (NOT SWIFTFILE_IS_MAIN)
+  if (NOT SWIFTFILE_IS_MAIN AND NOT SWIFTFILE_NO_SWIFTMODULE)
     add_custom_command_target(
         module_dependency_target
         COMMAND

stdlib/public/core/PreviousModuleInstallName.json

@@ -1,6 +1,6 @@
 [
   {
     "module": "CompatibilitySpan",
-    "install_name": "/usr/lib/swift/libswiftCompatibilitySpan.dylib"
+    "install_name": "@rpath/libswiftCompatibilitySpan.dylib"
   }
 ]

stdlib/public/core/Span/MutableRawSpan.swift

@@ -10,11 +10,16 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if SPAN_COMPATIBILITY_STUB
+import Swift
+#endif
+
 // A MutableRawSpan represents a span of memory which
 // contains initialized `Element` instances.
 @safe
 @frozen
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 public struct MutableRawSpan: ~Copyable & ~Escapable {
   @usableFromInline
   internal let _pointer: UnsafeMutableRawPointer?
@@ -40,10 +45,12 @@ public struct MutableRawSpan: ~Copyable & ~Escapable {
   }
 }
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan: @unchecked Sendable {}
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   @unsafe
@@ -115,7 +122,8 @@ extension MutableRawSpan {
   }
 }
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
   @_alwaysEmitIntoClient
   public var byteCount: Int { _count }
@@ -129,7 +137,8 @@ extension MutableRawSpan {
   }
 }
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   @_alwaysEmitIntoClient
@@ -154,7 +163,8 @@ extension MutableRawSpan {
   }
 }
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension RawSpan {
 
   @_alwaysEmitIntoClient
@@ -166,7 +176,8 @@ extension RawSpan {
   }
 }
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   public var bytes: RawSpan {
@@ -202,7 +213,8 @@ extension MutableRawSpan {
   }
 }
 
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   /// Returns a new instance of the given type, constructed from the raw memory
@@ -338,8 +350,13 @@ extension MutableRawSpan {
   }
 }
 
+// FIXME: The functions in this extension crash the SIL optimizer when built inside
+// the stub. But these declarations don't generate a public symbol anyway.
+#if !SPAN_COMPATIBILITY_STUB
+
 //MARK: copyMemory
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   @_alwaysEmitIntoClient
@@ -429,9 +446,11 @@ extension MutableRawSpan {
     update(fromContentsOf: source.bytes)
   }
 }
+#endif
 
 // MARK: sub-spans
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   /// Constructs a new span over the items within the supplied range of
@@ -546,7 +565,8 @@ extension MutableRawSpan {
 }
 
 // MARK: prefixes and suffixes
-@available(SwiftStdlib 6.2, *)
+@available(SwiftCompatibilitySpan 5.0, *)
+@_originallyDefinedIn(module: "Swift;CompatibilitySpan", SwiftCompatibilitySpan 6.2)
 extension MutableRawSpan {
 
   /// Returns a span containing the initial elements of this span,