[5.3] Apple Silicon support

CMakeLists.txt

@@ -462,6 +462,12 @@ if(SWIFT_PATH_TO_CMARK_BUILD)
 endif()
 message(STATUS "")
 
+if("${SWIFT_NATIVE_LLVM_TOOLS_PATH}" STREQUAL "")
+  set(SWIFT_CROSS_COMPILING FALSE)
+else()
+  set(SWIFT_CROSS_COMPILING TRUE)
+endif()
+
 include(SwiftSharedCMakeConfig)
 
 # NOTE: We include this before SwiftComponents as it relies on some LLVM CMake

benchmark/cmake/modules/AddSwiftBenchmarkSuite.cmake

@@ -105,7 +105,7 @@ macro(configure_build)
 endmacro()
 
 macro(configure_sdks_darwin)
-  set(macosx_arch "x86_64")
+  set(macosx_arch "x86_64" "arm64")
   set(iphoneos_arch "arm64" "arm64e" "armv7")
   set(appletvos_arch "arm64")
   set(watchos_arch "armv7k")
@@ -609,11 +609,7 @@ function (swift_benchmark_compile_archopts)
 
   if(is_darwin)
     # If host == target.
-    if("${BENCH_COMPILE_ARCHOPTS_PLATFORM}" STREQUAL "macosx")
-      set(OUTPUT_EXEC "${benchmark-bin-dir}/Benchmark_${BENCH_COMPILE_ARCHOPTS_OPT}")
-    else()
-      set(OUTPUT_EXEC "${benchmark-bin-dir}/Benchmark_${BENCH_COMPILE_ARCHOPTS_OPT}-${target}")
-    endif()
+    set(OUTPUT_EXEC "${benchmark-bin-dir}/Benchmark_${BENCH_COMPILE_ARCHOPTS_OPT}-${target}")
   else()
     # If we are on Linux, we do not support cross compiling.
     set(OUTPUT_EXEC "${benchmark-bin-dir}/Benchmark_${BENCH_COMPILE_ARCHOPTS_OPT}")

cmake/modules/DarwinSDKs.cmake

@@ -4,17 +4,34 @@ option(SWIFT_ENABLE_IOS32
 
 if(SWIFT_ENABLE_IOS32)
 set(SUPPORTED_IOS_ARCHS "armv7;armv7s;arm64;arm64e")
-set(SUPPORTED_IOS_SIMULATOR_ARCHS "i386;x86_64")
+set(SUPPORTED_IOS_SIMULATOR_ARCHS "i386;x86_64;arm64")
 else()
 set(SUPPORTED_IOS_ARCHS "arm64;arm64e")
-set(SUPPORTED_IOS_SIMULATOR_ARCHS "x86_64")
+set(SUPPORTED_IOS_SIMULATOR_ARCHS "x86_64;arm64")
 endif()
 
 set(SUPPORTED_TVOS_ARCHS "arm64")
-set(SUPPORTED_TVOS_SIMULATOR_ARCHS "x86_64")
+set(SUPPORTED_TVOS_SIMULATOR_ARCHS "x86_64;arm64")
 set(SUPPORTED_WATCHOS_ARCHS "armv7k")
-set(SUPPORTED_WATCHOS_SIMULATOR_ARCHS "i386")
-set(SUPPORTED_OSX_ARCHS "x86_64")
+set(SUPPORTED_WATCHOS_SIMULATOR_ARCHS "i386;arm64")
+set(SUPPORTED_OSX_ARCHS "x86_64;arm64;arm64e")
+
+# Get the SDK version from SDKSettings.
+execute_process(
+  COMMAND "defaults" "read" "${CMAKE_OSX_SYSROOT}/SDKSettings.plist" "Version"
+    OUTPUT_VARIABLE SWIFT_OSX_SDK_VERSION
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+# Remove the last component, if any. e.g. 10.15.26 -> 10.15
+string(REGEX REPLACE "\([0-9]*[.][0-9]*\)[.][0-9]*" "\\1"
+       SWIFT_OSX_SDK_VERSION "${SWIFT_OSX_SDK_VERSION}")
+
+if (${SWIFT_OSX_SDK_VERSION} STREQUAL "10.14" OR
+    ${SWIFT_OSX_SDK_VERSION} STREQUAL "10.15")
+  set(SUPPORTED_OSX_ARCHS "x86_64")
+else()
+  set(SUPPORTED_OSX_ARCHS "x86_64;arm64e")
+endif()
 
 is_sdk_requested(OSX swift_build_osx)
 if(swift_build_osx)

cmake/modules/SwiftConfigureSDK.cmake

@@ -85,6 +85,38 @@ function(_report_sdk prefix)
   message(STATUS "")
 endfunction()
 
+# Remove architectures not supported by the SDK from the given list.
+function(remove_sdk_unsupported_archs name os sdk_path architectures_var)
+  execute_process(COMMAND
+      /usr/libexec/PlistBuddy -c "Print :SupportedTargets:${os}:Archs" ${sdk_path}/SDKSettings.plist
+    OUTPUT_VARIABLE sdk_supported_archs
+    RESULT_VARIABLE plist_error)
+
+  if (NOT plist_error EQUAL 0)
+    message(STATUS "${os} SDK at ${sdk_path} does not publish its supported architectures")
+    return()
+  endif()
+
+  set(architectures)
+  foreach(arch ${${architectures_var}})
+    if(sdk_supported_archs MATCHES "${arch}\n")
+      list(APPEND architectures ${arch})
+    elseif(arch MATCHES "^armv7(s)?$" AND os STREQUAL "iphoneos")
+      # 32-bit iOS is not listed explicitly in SDK settings.
+      message(STATUS "Assuming ${name} SDK at ${sdk_path} supports architecture ${arch}")
+      list(APPEND architectures ${arch})
+    elseif(arch STREQUAL "i386" AND os STREQUAL "iphonesimulator")
+      # 32-bit iOS simulatoris not listed explicitly in SDK settings.
+      message(STATUS "Assuming ${name} SDK at ${sdk_path} supports architecture ${arch}")
+      list(APPEND architectures ${arch})
+    else()
+      message(STATUS "${name} SDK at ${sdk_path} does not support architecture ${arch}")
+    endif()
+  endforeach()
+
+  set("${architectures_var}" ${architectures} PARENT_SCOPE)
+endfunction()
+
 # Configure an SDK
 #
 # Usage:
@@ -164,6 +196,9 @@ macro(configure_sdk_darwin
       SWIFT_SDK_${prefix}_ARCHITECTURES)  # result
   endif()
 
+  # Remove any architectures not supported by the SDK.
+  remove_sdk_unsupported_archs(${name} ${xcrun_name} ${SWIFT_SDK_${prefix}_PATH} SWIFT_SDK_${prefix}_ARCHITECTURES)
+
   list_intersect(
     "${SWIFT_DARWIN_MODULE_ARCHS}"            # lhs
     "${architectures}"                        # rhs

cmake/modules/SwiftSharedCMakeConfig.cmake

@@ -58,7 +58,7 @@ macro(swift_common_standalone_build_config_llvm product)
     fix_imported_targets_for_xcode("${LLVM_EXPORTED_TARGETS}")
   endif()
 
-  if(NOT CMAKE_CROSSCOMPILING)
+  if(NOT CMAKE_CROSSCOMPILING AND NOT SWIFT_CROSS_COMPILING)
     set(${product}_NATIVE_LLVM_TOOLS_PATH "${LLVM_TOOLS_BINARY_DIR}")
   endif()
 

include/swift/AST/AvailabilitySpec.h

@@ -68,16 +68,33 @@ class PlatformVersionConstraintAvailabilitySpec : public AvailabilitySpec {
   SourceLoc PlatformLoc;
 
   llvm::VersionTuple Version;
+
+  // For macOS Big Sur, we we canonicalize 10.16 to 11.0 for compile-time
+  // checking since clang canonicalizes availability markup. However, to
+  // support Beta versions of macOS Big Sur where the OS
+  // reports 10.16 at run time, we need to compare against 10.16,
+  //
+  // This means for:
+  //
+  // if #available(macOS 10.16, *) { ... }
+  //
+  // we need to keep around both a canonical version for use in compile-time
+  // checks and an uncanonicalized version for the version to actually codegen
+  // with.
+  llvm::VersionTuple RuntimeVersion;
+
   SourceRange VersionSrcRange;
 
 public:
   PlatformVersionConstraintAvailabilitySpec(PlatformKind Platform,
                                             SourceLoc PlatformLoc,
                                             llvm::VersionTuple Version,
+                                            llvm::VersionTuple RuntimeVersion,
                                             SourceRange VersionSrcRange)
     : AvailabilitySpec(AvailabilitySpecKind::PlatformVersionConstraint),
       Platform(Platform),
       PlatformLoc(PlatformLoc), Version(Version),
+      RuntimeVersion(RuntimeVersion),
       VersionSrcRange(VersionSrcRange) {}
 
   /// The required platform.
@@ -93,6 +110,11 @@ class PlatformVersionConstraintAvailabilitySpec : public AvailabilitySpec {
   llvm::VersionTuple getVersion() const { return Version; }
   SourceRange getVersionSrcRange() const { return VersionSrcRange; }
 
+  // The version to be used in codegen for version comparisons at run time.
+  // This is required to support beta versions of macOS Big Sur that
+  // report 10.16 at run time.
+  llvm::VersionTuple getRuntimeVersion() const { return RuntimeVersion; }
+
   SourceRange getSourceRange() const;
 
   void print(raw_ostream &OS, unsigned Indent) const;

include/swift/AST/PlatformKind.h

@@ -20,6 +20,7 @@
 #include "swift/Basic/LLVM.h"
 #include "swift/Config.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/VersionTuple.h"
 
 namespace swift {
 
@@ -65,6 +66,9 @@ PlatformKind targetPlatform(LangOptions &LangOpts);
 /// an explicit attribute for the child.
 bool inheritsAvailabilityFromPlatform(PlatformKind Child, PlatformKind Parent);
 
+llvm::VersionTuple canonicalizePlatformVersion(
+    PlatformKind platform, const llvm::VersionTuple &version);
+
 } // end namespace swift
 
 #endif

include/swift/Remote/InProcessMemoryReader.h

@@ -38,7 +38,7 @@ class InProcessMemoryReader final : public MemoryReader {
 #else
     auto applePlatform = false;
 #endif
-#if defined(__APPLE__) && __APPLE__ && ((defined(TARGET_OS_IOS) && TARGET_OS_IOS) || (defined(TARGET_OS_IOS) && TARGET_OS_WATCH) || (defined(TARGET_OS_TV) && TARGET_OS_TV))
+#if defined(__APPLE__) && __APPLE__ && ((defined(TARGET_OS_IOS) && TARGET_OS_IOS) || (defined(TARGET_OS_IOS) && TARGET_OS_WATCH) || (defined(TARGET_OS_TV) && TARGET_OS_TV) || defined(__arm64__))
     auto iosDerivedPlatform = true;
 #else
     auto iosDerivedPlatform = false;
@@ -67,7 +67,7 @@ class InProcessMemoryReader final : public MemoryReader {
     case DLQ_GetObjCReservedLowBits: {
       auto result = static_cast<uint8_t *>(outBuffer);
       if (applePlatform && !iosDerivedPlatform && (sizeof(void *) == 8)) {
-        // Obj-C reserves low bit on 64-bit macOS only.
+        // Obj-C reserves low bit on 64-bit Intel macOS only.
         // Other Apple platforms don't reserve this bit (even when
         // running on x86_64-based simulators).
         *result = 1;

include/swift/SwiftRemoteMirror/SwiftRemoteMirrorLegacyInterop.h

@@ -585,7 +585,7 @@ swift_reflection_interop_minimalDataLayoutQueryFunction8(
 #else
     int applePlatform = 0;
 #endif
-#if defined(__APPLE__) && __APPLE__ && ((defined(TARGET_OS_IOS) && TARGET_OS_IOS) || (defined(TARGET_OS_IOS) && TARGET_OS_WATCH) || (defined(TARGET_OS_TV) && TARGET_OS_TV))
+#if defined(__APPLE__) && __APPLE__ && ((defined(TARGET_OS_IOS) && TARGET_OS_IOS) || (defined(TARGET_OS_IOS) && TARGET_OS_WATCH) || (defined(TARGET_OS_TV) && TARGET_OS_TV) || defined(__arm64__))
     int iosDerivedPlatform = 1;
 #else
     int iosDerivedPlatform = 0;

lib/AST/Availability.cpp

@@ -246,9 +246,16 @@ AvailabilityContext ASTContext::getSwift50Availability() {
     return AvailabilityContext::alwaysAvailable();
 
   if (target.isMacOSX()) {
+    if (target.isAArch64())
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
                             VersionRange::allGTE(llvm::VersionTuple(10,14,4)));
   } else if (target.isiOS()) {
+    if (target.isAArch64() &&
+        (target.isSimulatorEnvironment() || target.isMacCatalystEnvironment()))
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
                             VersionRange::allGTE(llvm::VersionTuple(12,2)));
   } else if (target.isWatchOS()) {
@@ -274,9 +281,16 @@ AvailabilityContext ASTContext::getSwift51Availability() {
     return AvailabilityContext::alwaysAvailable();
 
   if (target.isMacOSX()) {
+    if (target.isAArch64())
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
                             VersionRange::allGTE(llvm::VersionTuple(10,15,0)));
   } else if (target.isiOS()) {
+    if (target.isAArch64() &&
+        (target.isSimulatorEnvironment() || target.isMacCatalystEnvironment()))
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
                             VersionRange::allGTE(llvm::VersionTuple(13,0,0)));
   } else if (target.isWatchOS()) {
@@ -301,18 +315,27 @@ AvailabilityContext ASTContext::getSwift52Availability() {
   if (target.getArchName() == "arm64e")
     return AvailabilityContext::alwaysAvailable();
 
-  if (target.isMacOSX() ) {
+  if (target.isMacOSX()) {
+    if (target.isAArch64())
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(10, 99, 0)));
+        VersionRange::allGTE(llvm::VersionTuple(10, 15, 4)));
   } else if (target.isiOS()) {
+    if (target.isAArch64() &&
+        (target.isSimulatorEnvironment() || target.isMacCatalystEnvironment()))
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(99, 0, 0)));
+        VersionRange::allGTE(llvm::VersionTuple(13, 4, 0)));
   } else if (target.isWatchOS()) {
+    if (target.isArch64Bit())
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(9, 99, 0)));
-  } else {
-    return AvailabilityContext::alwaysAvailable();
+        VersionRange::allGTE(llvm::VersionTuple(6, 2, 0)));
   }
+  return AvailabilityContext::alwaysAvailable();
 }
 
 AvailabilityContext ASTContext::getSwift53Availability() {
@@ -322,14 +345,26 @@ AvailabilityContext ASTContext::getSwift53Availability() {
     return AvailabilityContext::alwaysAvailable();
 
   if (target.isMacOSX() ) {
+    if (target.isAArch64())
+      return AvailabilityContext::alwaysAvailable();
+
+    llvm::VersionTuple macOVersion53(10, 16, 0);
+    macOVersion53 = canonicalizePlatformVersion(PlatformKind::OSX, macOVersion53);
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(10, 99, 0)));
+        VersionRange::allGTE(macOVersion53));
   } else if (target.isiOS()) {
+    if (target.isAArch64() &&
+        (target.isSimulatorEnvironment() || target.isMacCatalystEnvironment()))
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(99, 0, 0)));
+        VersionRange::allGTE(llvm::VersionTuple(14, 0, 0)));
   } else if (target.isWatchOS()) {
+    if (target.isArch64Bit())
+      return AvailabilityContext::alwaysAvailable();
+
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(9, 99, 0)));
+        VersionRange::allGTE(llvm::VersionTuple(7, 0, 0)));
   } else {
     return AvailabilityContext::alwaysAvailable();
   }
@@ -340,7 +375,7 @@ AvailabilityContext ASTContext::getSwiftFutureAvailability() {
 
   if (target.isMacOSX() ) {
     return AvailabilityContext(
-        VersionRange::allGTE(llvm::VersionTuple(10, 99, 0)));
+        VersionRange::allGTE(llvm::VersionTuple(99, 99, 0)));
   } else if (target.isiOS()) {
     return AvailabilityContext(
         VersionRange::allGTE(llvm::VersionTuple(99, 0, 0)));

lib/AST/PlatformKind.cpp

@@ -20,6 +20,7 @@
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/ErrorHandling.h"
 
+
 using namespace swift;
 
 StringRef swift::platformString(PlatformKind platform) {
@@ -155,3 +156,17 @@ bool swift::inheritsAvailabilityFromPlatform(PlatformKind Child,
 
   return false;
 }
+
+llvm::VersionTuple swift::canonicalizePlatformVersion(
+    PlatformKind platform, const llvm::VersionTuple &version) {
+
+  // Canonicalize macOS version for macOS Big Sur to great
+  // 10.16 as 11.0.
+  if (platform == PlatformKind::OSX ||
+      platform == PlatformKind::OSXApplicationExtension) {
+    return llvm::Triple::getCanonicalVersionForOS(llvm::Triple::MacOSX,
+                                                  version);
+  }
+
+  return version;
+}

lib/Basic/Platform.cpp

@@ -387,6 +387,9 @@ swift::getSwiftRuntimeCompatibilityVersionForTarget(
   if (Triple.isMacOSX()) {
     Triple.getMacOSXVersion(Major, Minor, Micro);
     if (Major == 10) {
+      if (Triple.isAArch64() && Minor <= 16)
+        return llvm::VersionTuple(5, 3);
+
       if (Minor <= 14) {
         return llvm::VersionTuple(5, 0);
       } else if (Minor <= 15) {
@@ -396,9 +399,18 @@ swift::getSwiftRuntimeCompatibilityVersionForTarget(
           return llvm::VersionTuple(5, 2);
         }
       }
+    } else if (Major == 11) {
+      return llvm::VersionTuple(5, 3);
     }
   } else if (Triple.isiOS()) { // includes tvOS
     Triple.getiOSVersion(Major, Minor, Micro);
+
+    // arm64 simulators and macCatalyst are introduced in iOS 14.0/tvOS 14.0
+    // with Swift 5.3
+    if (Triple.isAArch64() && Major <= 14 &&
+        (Triple.isSimulatorEnvironment() || Triple.isMacCatalystEnvironment()))
+      return llvm::VersionTuple(5, 3);
+
     if (Major <= 12) {
       return llvm::VersionTuple(5, 0);
     } else if (Major <= 13) {