---

yaml
---
r: 322527
b: refs/heads/tensorflow-next
c: 26ae7f9
h: refs/heads/master
i:
  322525: 1440817
  322523: 29e736e
  322519: a0fb2b3
  322511: 6e94199
  322495: 313bccd

Author: bob-wilson

[refs]

@@ -1461,4 +1461,4 @@ refs/heads/master-rebranch: 86e95c23aa0d37f24ec138b7853146c1cead2e40
 refs/heads/rdar-53901732: 9bd06af3284e18a109cdbf9aa59d833b24eeca7b
 refs/heads/revert-26776-subst-always-returns-a-type: 1b8e18fdd391903a348970a4c848995d4cdd789c
 refs/heads/tensorflow-merge: 8b854f62f80d4476cb383d43c4aac2001dde3cec
-refs/heads/tensorflow-next: c285e78d9e645497a1b7c6c6e5c0673cc0955d73
+refs/heads/tensorflow-next: 26ae7f99b0da38747db49186872d7fca1b800817

branches/tensorflow-next/CMakeLists.txt

@@ -409,13 +409,30 @@ if(MSVC OR "${CMAKE_SIMULATE_ID}" STREQUAL MSVC)
   include(ClangClCompileRules)
 endif()
 
-if(CMAKE_SYSTEM_NAME STREQUAL Darwin OR
-    EXISTS ${SWIFT_PATH_TO_LIBDISPATCH_SOURCE})
+precondition(CMAKE_SYSTEM_NAME)
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
   set(SWIFT_BUILD_SYNTAXPARSERLIB_default TRUE)
   set(SWIFT_BUILD_SOURCEKIT_default TRUE)
+elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
+  if(EXISTS ${SWIFT_PATH_TO_LIBDISPATCH_SOURCE})
+    set(SWIFT_BUILD_SYNTAXPARSERLIB_default TRUE)
+    set(SWIFT_BUILD_SOURCEKIT_default TRUE)
+  else()
+    set(SWIFT_BUILD_SYNTAXPARSERLIB_default FALSE)
+    set(SWIFT_BUILD_SOURCEKIT_default FALSE)
+  endif()
+elseif(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  if(EXISTS ${SWIFT_PATH_TO_LIBDISPATCH_SOURCE} AND
+     CMAKE_CXX_COMPILER_ID STREQUAL Clang)
+    set(SWIFT_BUILD_SYNTAXPARSERLIB_default TRUE)
+    set(SWIFT_BUILD_SOURCEKIT_default TRUE)
+  else()
+    set(SWIFT_BUILD_SYNTAXPARSERLIB_default FALSE)
+    set(SWIFT_BUILD_SOURCEKIT_default FALSE)
+  endif()
 else()
-  set(SWIFT_BUILD_SYNTAXPARSERLIB_default FALSE)
-  set(SWIFT_BUILD_SOURCEKIT_default FALSE)
+    set(SWIFT_BUILD_SYNTAXPARSERLIB_default FALSE)
+    set(SWIFT_BUILD_SOURCEKIT_default FALSE)
 endif()
 option(SWIFT_BUILD_SYNTAXPARSERLIB
     "Build the Swift Syntax Parser library"

branches/tensorflow-next/cmake/modules/SwiftSource.cmake

@@ -235,6 +235,10 @@ function(_compile_swift_files
     list(APPEND swift_flags "-Xfrontend" "-assume-single-threaded")
   endif()
 
+  if(SWIFTFILE_IS_STDLIB)
+    list(APPEND swift_flags "-Xfrontend" "-enable-mandatory-semantic-arc-opts")
+  endif()
+
   if(NOT SWIFT_ENABLE_STDLIBCORE_EXCLUSIVITY_CHECKING AND SWIFTFILE_IS_STDLIB)
     list(APPEND swift_flags "-Xfrontend" "-enforce-exclusivity=unchecked")
   endif()

branches/tensorflow-next/cmake/modules/SwiftWindowsSupport.cmake

@@ -80,28 +80,3 @@ function(swift_windows_cache_VCVARS)
   set(UCRTVersion $ENV{UCRTVersion} CACHE STRING "")
 endfunction()
 
-# NOTE(compnerd) we use a macro here as this modifies global variables
-macro(swift_swap_compiler_if_needed target)
-  if(NOT CMAKE_C_COMPILER_ID MATCHES Clang)
-    if(CMAKE_SYSTEM_NAME STREQUAL CMAKE_HOST_SYSTEM_NAME)
-      get_target_property(CLANG_LOCATION clang LOCATION)
-      get_filename_component(CLANG_LOCATION ${CLANG_LOCATION} DIRECTORY)
-
-      if("${CMAKE_C_COMPILER_ID}" STREQUAL "MSVC" OR
-          "${CMAKE_C_SIMULATE_ID}" STREQUAL "MSVC")
-        set(CMAKE_C_COMPILER
-          ${CLANG_LOCATION}/clang-cl${CMAKE_EXECUTABLE_SUFFIX})
-        set(CMAKE_CXX_COMPILER
-          ${CLANG_LOCATION}/clang-cl${CMAKE_EXECUTABLE_SUFFIX})
-      else()
-        set(CMAKE_C_COMPILER
-          ${CLANG_LOCATION}/clang${CMAKE_EXECUTABLE_SUFFIX})
-        set(CMAKE_CXX_COMPILER
-          ${CLANG_LOCATION}/clang++${CMAKE_EXECUTABLE_SUFFIX})
-      endif()
-    else()
-      message(SEND_ERROR "${target} requires a clang based compiler")
-    endif()
-  endif()
-endmacro()
-

branches/tensorflow-next/docs/Testing.md

@@ -113,8 +113,6 @@ out with ``lit.py -h``. We document some of the more useful ones below:
 * ``--param swift_test_mode=<MODE>`` drives the various suffix variations
   mentioned above. Again, it's best to get the invocation from the existing
   build system targets and modify it rather than constructing it yourself.
-* ``--param use_os_stdlib`` will run all tests with the standard libraries
-  coming from the OS.
 
 ##### Remote testing options
 

branches/tensorflow-next/docs/WindowsBuild.md

@@ -41,8 +41,6 @@ it provides some of the needed headers and libraries.
 1. Clone `apple/swift-corelibs-foundation` into a folder named `swift-corelibs-foundation`
 1. Clone `apple/swift-corelibs-xctest` into a folder name `swift-corelibs-xctest`
 1. Clone `apple/swift-lldb` into a folder named `lldb`
-1. Clone `apple/swift-llbuild` into a folder named `llbuild`
-1. Clone `apple/swift-package-manager` info a folder named `swift-package-manager`
 1. Clone `curl` into a folder named `curl`
 1. Clone `libxml2` into a folder named `libxml2`
 
@@ -56,20 +54,19 @@ subst S: <path to sources>
 ```
 
 ```cmd
+git config --global core.autocrlf input
 S:
 git clone https://github.com/apple/swift-cmark cmark
 git clone https://github.com/apple/swift-clang clang
 git clone https://github.com/apple/swift-llvm llvm
 git clone https://github.com/apple/swift-compiler-rt compiler-rt
-git clone -c core.autocrlf=input https://github.com/apple/swift
+git clone https://github.com/apple/swift
 git clone https://github.com/apple/swift-corelibs-libdispatch
 git clone https://github.com/apple/swift-corelibs-foundation
 git clone https://github.com/apple/swift-corelibs-xctest
 git clone https://github.com/apple/swift-lldb lldb
-git clone https://github.com/apple/swift-llbuild llbuild
-git clone -c core.autocrlf=input https://github.com/apple/swift-package-manager
-git clone https://github.com/curl/curl.git
-git clone https://gitlab.gnome.org/GNOME/libxml2.git
+git clone https://github.com/curl/curl.git curl
+git clone https://gitlab.gnome.org/GNOME/libxml2.git libxml2
 ```
 
 ### 3. Acquire ICU
@@ -80,15 +77,7 @@ git clone https://gitlab.gnome.org/GNOME/libxml2.git
 PATH S:\icu\bin64;%PATH%
 ```
 
-### 4. Fetch SQLite3
-
-```powershell
-(New-Object System.Net.WebClient).DownloadFile("https://www.sqlite.org/2019/sqlite-amalgamation-3270200.zip", "S:\sqlite-amalgamation-3270200.zip")
-Add-Type -A System.IO.Compression.FileSystem
-[IO.Compression.ZipFile]::ExtractToDirectory("S:\sqlite-amalgamation-3270200.zip", "S:\")
-```
-
-### 5. Get ready
+### 4. Get ready
 - From within a **developer** command prompt (not PowerShell nor cmd, but the [Visual Studio Developer Command Prompt](https://msdn.microsoft.com/en-us/library/f35ctcxw.aspx)), execute the following command if you have an x64 PC.
 
 ```cmd
@@ -119,7 +108,7 @@ mklink "%VCToolsInstallDir%\include\visualc.apinotes" S:\swift\stdlib\public\Pla
 
 Warning: Creating the above links usually requires administrator privileges. The quick and easy way to do this is to open a second developer prompt by right clicking whatever shortcut you used to open the first one, choosing Run As Administrator, and pasting the above commands into the resulting window. You can then close the privileged prompt; this is the only step which requires elevation.
 
-### 6. Build LLVM/Clang
+### 5. Build LLVM/Clang
 - This must be done from within a developer command prompt. LLVM and Clang are
   large projects, so building might take a few hours. Make sure that the build
   type for LLVM/Clang is compatbile with the build type for Swift. That is,
@@ -148,7 +137,7 @@ cmake --build "S:\b\llvm"
 path S:\b\llvm\bin;%PATH%
 ```
 
-### 7. Build CMark
+### 6. Build CMark
 - This must be done from within a developer command prompt. CMark is a fairly
   small project and should only take a few minutes to build.
 ```cmd
@@ -163,7 +152,7 @@ popd
 cmake --build "S:\b\cmark"
 ```
 
-### 8. Build Swift
+### 7. Build Swift
 - This must be done from within a developer command prompt
 - Note that Visual Studio vends a 32-bit python 2.7 installation in `C:\Python27` and a 64-bit python in `C:\Python27amd64`.  You may use either one based on your installation.
 
@@ -204,7 +193,7 @@ cmake --build "S:\b\swift"
 cmake -G "Visual Studio 2017" -A x64 -T "host=x64"^ ...
 ```
 
-### 9. Build lldb
+### 8. Build lldb
 - This must be done from within a developer command prompt and could take hours
   depending on your system.
 ```cmd
@@ -225,7 +214,7 @@ popd
 cmake --build S:\b\lldb
 ```
 
-### 10. Running tests on Windows
+### 9. Running tests on Windows
 
 Running the testsuite on Windows has additional external dependencies.  You must have a subset of the GNUWin32 programs installed and available in your path.  The following packages are currently required:
 
@@ -239,7 +228,7 @@ path S:\thirdparty\icu4c-63_1-Win64-MSVC2017\bin64;S:\b\swift\bin;S:\b\swift\lib
 ninja -C S:\b\swift check-swift
 ```
 
-### 11. Build swift-corelibs-libdispatch
+### 10. Build swift-corelibs-libdispatch
 
 ```cmd
 mkdir "S:\b\libdispatch"
@@ -261,7 +250,7 @@ cmake --build S:\b\libdispatch
 path S:\b\libdispatch;S:\b\libdispatch\src;%PATH%
 ```
 
-### 12. Build curl
+### 11. Build curl
 
 ```cmd
 pushd "S:\curl"
@@ -271,7 +260,7 @@ nmake /f Makefile.vc mode=static VC=15 MACHINE=x64
 popd
 ```
 
-### 13. Build libxml2
+### 12. Build libxml2
 
 ```cmd
 pushd "S:\libxml2\win32"
@@ -280,7 +269,7 @@ nmake /f Makefile.msvc
 popd
 ```
 
-### 14. Build swift-corelibs-foundation
+### 13. Build swift-corelibs-foundation
 
 ```cmd
 mkdir "S:\b\foundation"
@@ -307,7 +296,7 @@ cmake -G Ninja^
 path S:\b\foundation;%PATH%
 ```
 
-### 15. Build swift-corelibs-xctest
+### 14. Build swift-corelibs-xctest
 
 ```cmd
 mkdir "S:\b\xctest"
@@ -332,13 +321,13 @@ cmake --build S:\b\xctest
 path S:\b\xctest;%PATH%
 ```
 
-### 16. Test XCTest
+### 15. Test XCTest
 
 ```cmd
 ninja -C S:\b\xctest check-xctest
 ```
 
-### 17. Rebuild Foundation
+### 16. Rebuild Foundation
 
 ```cmd
 mkdir "S:\b\foundation"
@@ -361,55 +350,14 @@ cmake -G Ninja^
  cmake --build S:\b\foundation
 ```
 
-### 18. Test Foundation
+### 17. Test Foundation
 
 ```cmd
 cmake --build S:\b\foundation
 ninja -C S:\b\foundation test 
 ```
 
-### 19. Build SQLite3
-
-```cmd
-md S:\b\sqlite
-cd S:\b\sqlite
-cl /MD /Ox /Zi /LD /DSQLITE_API=__declspec(dllexport) S:\sqlite-amalgamation-3270200\sqlite.c
-```
-
- - Add SQLite3 to your path:
-```cmd
-path S:\b\sqlite;%PATH%
-```
-
-### 20. Build llbuild
-
-```cmd
-md S:\b\llbuild
-cd S:\b\llbuild
-cmake -G Ninja^
-  -DCMAKE_BUILD_TYPE=RelWithDebInfo^
-  -DCMAKE_C_COMPILER=cl^
-  -DCMAKE_CXX_COMPILER=cl^
-  -DLLBUILD_PATH_TO_SQLITE_SOURCE=S:\sqlite-amalgamation-3270200^
-  -DLLBUILD_PATH_TO_SQLITE_BUILD=S:\b\sqlite^
-  S:\swift-llbuild
-ninja
-```
-
- - Add llbuild to your path:
-```cmd
-path S:\b\llbuild;%PATH%
-```
-
-### 21. Build swift-package-manager
-
-```cmd
-md S:\b\spm
-cd S:\b\spm
-C:\Python27\python.exe S:\swift-package-manager\Utilities\bootstrap --foundation S:\b\foundation --libdispatch-build-dir S:\b\libdispatch --libdispatch-source-dir S:\swift-corelibs-libdispatch --llbuild-build-dir S:\b\llbuild --llbuild-source-dir S:\llbuild --sqlite-build-dir S:\b\sqlite --sqlite-source-dir S:\sqlite-amalgamation-3270200
-```
-
-### 22. Install Swift on Windows
+### 18. Install Swift on Windows
 
 - Run ninja install:
 
@@ -418,3 +366,7 @@ ninja -C S:\b\swift install
 ```
 
 - Add the Swift on Windows binaries path (`C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin`)  to the `PATH` environment variable.
+
+## MSVC
+
+To use `cl` instead, just replace the `-DCMAKE_C_COMPILER` and `-DCMAKE_CXX_COMPILER` parameters to the `cmake` invocations.

branches/tensorflow-next/include/swift/AST/DiagnosticsSema.def

@@ -815,6 +815,13 @@ ERROR(precedence_group_redeclared,none,
 NOTE(previous_precedence_group_decl,none,
      "previous precedence group declaration here", ())
 
+//------------------------------------------------------------------------------
+// MARK: Type Check Coercions
+//------------------------------------------------------------------------------
+
+ERROR(tuple_conversion_not_expressible,none,
+      "cannot express tuple conversion %0 to %1", (Type, Type))
+
 //------------------------------------------------------------------------------
 // MARK: Expression Type Checking Errors
 //------------------------------------------------------------------------------