Merge master 2020-07-06 resolving broken build

CMakeLists.txt

@@ -458,6 +458,12 @@ 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 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/DiagnosticsSema.def

@@ -3151,6 +3151,8 @@ ERROR(autodiff_attr_original_multiple_semantic_results,none,
 ERROR(autodiff_attr_result_not_differentiable,none,
       "can only differentiate functions with results that conform to "
       "'Differentiable', but %0 does not conform to 'Differentiable'", (Type))
+ERROR(autodiff_attr_opaque_result_type_unsupported,none,
+      "cannot differentiate functions returning opaque result types", ())
 
 // differentiation `wrt` parameters clause
 ERROR(diff_function_no_parameters,none,

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(const 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/AST/SubstitutionMap.h

@@ -286,6 +286,12 @@ class SubstitutionMap {
   Type lookupSubstitution(CanSubstitutableType type) const;
 };
 
+inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
+                                     const SubstitutionMap &subs) {
+  subs.dump(OS);
+  return OS;
+}
+
 /// A function object suitable for use as a \c TypeSubstitutionFn that
 /// queries an underlying \c SubstitutionMap.
 struct QuerySubstitutionMap {

include/swift/AST/TypeCheckRequests.h

@@ -2192,7 +2192,7 @@ class DerivativeAttrOriginalDeclRequest
 /// property in a `Differentiable`-conforming type.
 class TangentStoredPropertyRequest
     : public SimpleRequest<TangentStoredPropertyRequest,
-                           TangentPropertyInfo(VarDecl *),
+                           TangentPropertyInfo(VarDecl *, CanType),
                            RequestFlags::Cached> {
 public:
   using SimpleRequest::SimpleRequest;
@@ -2201,8 +2201,8 @@ class TangentStoredPropertyRequest
   friend SimpleRequest;
 
   // Evaluation.
-  TangentPropertyInfo evaluate(Evaluator &evaluator,
-                               VarDecl *originalField) const;
+  TangentPropertyInfo evaluate(Evaluator &evaluator, VarDecl *originalField,
+                               CanType parentType) const;
 
 public:
   // Caching.

include/swift/AST/TypeCheckerTypeIDZone.def

@@ -204,7 +204,7 @@ SWIFT_REQUEST(TypeChecker, SynthesizeAccessorRequest,
               AccessorDecl *(AbstractStorageDecl *, AccessorKind),
               SeparatelyCached, NoLocationInfo)
 SWIFT_REQUEST(TypeChecker, TangentStoredPropertyRequest,
-              llvm::Expected<VarDecl *>(VarDecl *), Cached, NoLocationInfo)
+              llvm::Expected<VarDecl *>(VarDecl *, CanType), Cached, NoLocationInfo)
 SWIFT_REQUEST(TypeChecker, TypeCheckFunctionBodyRequest,
               bool(AbstractFunctionDecl *), Cached, NoLocationInfo)
 SWIFT_REQUEST(TypeChecker, TypeCheckFunctionBodyAtLocRequest,

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/SIL/ApplySite.h

@@ -21,9 +21,11 @@
 #ifndef SWIFT_SIL_APPLYSITE_H
 #define SWIFT_SIL_APPLYSITE_H
 
+#include "swift/SIL/SILArgument.h"
 #include "swift/SIL/SILBasicBlock.h"
-#include "swift/SIL/SILInstruction.h"
 #include "swift/SIL/SILFunction.h"
+#include "swift/SIL/SILInstruction.h"
+#include "llvm/ADT/ArrayRef.h"
 
 namespace swift {
 
@@ -502,6 +504,34 @@ class FullApplySite : public ApplySite {
     return getSubstCalleeConv().hasIndirectSILResults();
   }
 
+  /// If our apply site has a single direct result SILValue, return that
+  /// SILValue. Return SILValue() otherwise.
+  ///
+  /// This means that:
+  ///
+  /// 1. If we have an ApplyInst, we just visit the apply.
+  /// 2. If we have a TryApplyInst, we visit the first argument of the normal
+  ///    block.
+  /// 3. If we have a BeginApplyInst, we return SILValue() since the begin_apply
+  ///    yields values instead of returning them. A returned value should only
+  ///    be valid after a full apply site has completely finished executing.
+  SILValue getSingleDirectResult() const {
+    switch (getKind()) {
+    case FullApplySiteKind::ApplyInst:
+      return SILValue(cast<ApplyInst>(getInstruction()));
+    case FullApplySiteKind::BeginApplyInst: {
+      return SILValue();
+    }
+    case FullApplySiteKind::TryApplyInst: {
+      auto *normalBlock = cast<TryApplyInst>(getInstruction())->getNormalBB();
+      assert(normalBlock->getNumArguments() == 1 &&
+             "Expected try apply to have a single result");
+      return normalBlock->getArgument(0);
+    }
+    }
+    llvm_unreachable("Covered switch isn't covered?!");
+  }
+
   unsigned getNumIndirectSILResults() const {
     return getSubstCalleeConv().getNumIndirectSILResults();
   }

include/swift/SIL/SILBuilder.h

@@ -726,7 +726,8 @@ class SILBuilder {
   }
 
   LoadBorrowInst *createLoadBorrow(SILLocation Loc, SILValue LV) {
-    assert(isLoadableOrOpaque(LV->getType()));
+    assert(isLoadableOrOpaque(LV->getType()) &&
+           !LV->getType().isTrivial(getFunction()));
     return insert(new (getModule())
                       LoadBorrowInst(getSILDebugLocation(Loc), LV));
   }
@@ -737,11 +738,19 @@ class SILBuilder {
                       BeginBorrowInst(getSILDebugLocation(Loc), LV));
   }
 
+  /// Convenience function for creating a load_borrow on non-trivial values and
+  /// load [trivial] on trivial values. Becomes load unqualified in non-ossa
+  /// functions.
   SILValue emitLoadBorrowOperation(SILLocation loc, SILValue v) {
     if (!hasOwnership()) {
       return emitLoadValueOperation(loc, v,
                                     LoadOwnershipQualifier::Unqualified);
     }
+
+    if (v->getType().isTrivial(getFunction())) {
+      return emitLoadValueOperation(loc, v, LoadOwnershipQualifier::Trivial);
+    }
+
     return createLoadBorrow(loc, v);
   }
 
@@ -877,6 +886,33 @@ class SILBuilder {
                       StoreBorrowInst(getSILDebugLocation(Loc), Src, DestAddr));
   }
 
+  /// A helper function for emitting store_borrow in operations where one must
+  /// handle both ossa and non-ossa code.
+  ///
+  /// In words:
+  ///
+  /// * If the function does not have ownership, this just emits an unqualified
+  ///   store.
+  ///
+  /// * If the function has ownership, but the type is trivial, use store
+  ///   [trivial].
+  ///
+  /// * Otherwise, emit an actual store_borrow.
+  void emitStoreBorrowOperation(SILLocation loc, SILValue src,
+                                SILValue destAddr) {
+    if (!hasOwnership()) {
+      return emitStoreValueOperation(loc, src, destAddr,
+                                     StoreOwnershipQualifier::Unqualified);
+    }
+
+    if (src->getType().isTrivial(getFunction())) {
+      return emitStoreValueOperation(loc, src, destAddr,
+                                     StoreOwnershipQualifier::Trivial);
+    }
+
+    createStoreBorrow(loc, src, destAddr);
+  }
+
   MarkUninitializedInst *
   createMarkUninitialized(SILLocation Loc, SILValue src,
                           MarkUninitializedInst::Kind k) {