Commit Graph

256 Commits

Author SHA1 Message Date
Erik Eckstein
09552abc44 libswift: improve the bootstrapping-with-hostlibs build mode
Don't build the swiftCore module files in the bootstrapping phases. Instead use the module files in the SDK.
This reduces the build time overhead from 3min -> 30seconds.
2021-11-05 18:32:25 +01:00
Karoy Lorentey
2732765096 [CMake] Introduce availability macros for all known stdlib releases
Introduce "SwiftStdlib x.y"-style availability macros for all known releases of the stdlib, adding them to the swift flags of all Swift libraries and tests.
2021-10-28 18:31:54 -07:00
Doug Gregor
c9e1032480 Remove underscores from CFBundleIdentifier of libraries.
Underscores aren't permitted in these identifiers.
Fixes rdar://84645973.
2021-10-26 20:57:19 -07:00
Saleem Abdulrasool
15a5d2c54b Revert "[android] Update to NDK 23" 2021-10-16 11:07:23 -07:00
swift-ci
46f3cc9dd8 Merge pull request #39045 from buttaface/android-ndk-23 2021-10-15 20:55:19 -07:00
Kuba (Brecka) Mracek
99a24d47be Introduce a CMake flag to disable fast-path context descriptor lookup based on short manglings (#39729) 2021-10-14 08:08:07 -07:00
Kuba (Brecka) Mracek
557bf685be Don't include support for old mangling in runtimes without ObjC interop (#39675) 2021-10-13 19:47:05 -07:00
Kuba (Brecka) Mracek
5ff64f8443 Introduce a CMake option to disable MetadataAllocator and use malloc+free instead, use it for freestandning preset (#39678) 2021-10-12 16:20:08 -07:00
Kuba (Brecka) Mracek
1147d08ae3 Disable stable ABI on freestanding stdlib (#39674) 2021-10-12 15:25:57 -07:00
Kuba (Brecka) Mracek
c2c1bfb053 Add SWIFT_STDLIB_HAS_ENVIRON to remove usage of getenv/environ from stdlib (#39599) 2021-10-12 07:16:36 -07:00
Kuba (Brecka) Mracek
653642df75 Add a SWIFT_STDLIB_HAS_DARWIN_ASL config flag to allow removing asl_log() usage in freestanding build (#39584) 2021-10-12 07:14:33 -07:00
Butta
7fa1b4b2ac [android] Update to NDK 23
The latest Long Term Support NDK finally removed binutils, including the bfd/gold
linkers and libgcc. This simplifies our Android support, including making lld the
default linker for Android. Disable three reflection tests that now fail, likely
related to issues with swift-reflection-dump and switching to lld.

Also, add the libatomic dependency for Android armv7, just as on linux.
2021-10-12 12:37:01 +05:30
Kuba (Brecka) Mracek
ca0dff803b Turn existing ifdefs around backtrace() API into a CMake SWIFT_SUPPORTS_BACKTRACE_REPORTING flag (#39598) 2021-10-06 14:46:08 -07:00
Meghana Gupta
83c023446a Use -enable-ossa-modules for all of stdlib/public (#39478)
With this, even non-transparent functions will have their ownership eliminated later in the pipeline
2021-09-30 10:20:08 -07:00
Kuba (Brecka) Mracek
c2a92722c6 Split the NO_DYLD CMake flag into separate HAS_DLADDR and STATIC_IMAGE_INSPECTION flags (#39339) 2021-09-29 19:57:05 -07:00
Erik Eckstein
af71088d29 libswift: bootstrapping build
Adding build modes for libswift: off, hosttools, bootstrapping, bootstrapping-with-hostlibs
The two bootstrapping modes are new. For details see libswift/README.md
2021-09-28 18:51:42 +02:00
Alastair Houghton
8be084f30a Merge pull request #39187 from al45tair/problem/79725187
[Demangler] Improve remangler error handling
2021-09-27 17:03:49 +01:00
Kuba (Brecka) Mracek
6766824d51 Add a SWIFT_STDLIB_HAS_STDIN flag to compile out the Swift.readLine() API from the stdlib (for the 'freestanding' preset) (#39332) 2021-09-17 10:42:14 -07:00
Argyrios Kyrtzidis
90448e77e1 [AddSwiftStdlib.cmake] Add the info.plist file as link dependency 2021-09-12 16:17:47 -07:00
Kuba (Brecka) Mracek
404badb49a Introduce SWIFT_ENABLE_REFLECTION to turn on/off the support for Mirrors and reflection (#33617) 2021-09-08 13:08:13 -07:00
Alastair Houghton
227b438963 [Demangling] Added DEMANGLER_ASSERT to replace assert() calls.
This returns an error code if we're in the runtime, rather than assert()ing.

rdar://79725187
2021-09-06 17:49:50 +01:00
Arnold Schwaighofer
a864d4ed04 Don't enable GlobalISel on arm64e
It is not well supported

rdar://82082527
2021-08-30 13:06:49 -07:00
Doug Gregor
3f749dc13b Add an option to build the concurrency library for back deployment.
Introduce an additional build product to build-script to build
back-deployable concurrency libraries. These libraries would need to
be embedded in apps deployed prior to macOS 12/iOS 15 to support
concurrency.

The built-script option `--back-deploy-concurrency` can be provided to
build these back-deployment libraries. They are built in addition to
the normal concurrency libraries, as a separate product that installs
into `lib/swift-5.5/<platform>` within the toolchain. The macro
`SWIFT_CONCURRENCY_BACK_DEPLOYMENT` is set when building the
concurrency library, so that we can adapt the implementation to older
OS's.
2021-08-26 08:49:43 -07:00
Kuba (Brecka) Mracek
bcbe8e7bff Remove SWIFTLIB_SINGLE_TARGET_LIBRARY (#38978)
* Remove SWIFTLIB_SINGLE_TARGET_LIBRARY

* Use NOSWIFTRT on BlocksRuntime
2021-08-24 07:46:43 -07:00
Kuba (Brecka) Mracek
aaff37ffb8 Add a SWIFT_STDLIB_HAS_DARWIN_LIBMALLOC flag to allow/disallow uses of Darwin libmalloc APIs (malloc_default_zone, malloc_zone_malloc, etc.) (#33812) 2021-08-23 19:37:43 -07:00
Kuba (Brecka) Mracek
c079c0897b Split SWIFT_DARWIN_PLATFORMS and SWIFT_APPLE_PLATFORMS in CMake. SWIFT_APPLE_PLATFORMS may contain 'FREESTANDING' when building the freestanding SDK and SWIFT_FREESTANDING_FLAVOR is set to 'apple'. (#38997) 2021-08-23 19:16:28 -07:00
Kuba (Brecka) Mracek
47f156fb21 Apply the CMake Apple Silicon workaround for the 'FREESTANDING' SDK too (#38956) 2021-08-21 14:31:07 -07:00
Kuba (Brecka) Mracek
14b3b38c53 Make SWIFT_STDLIB_ENABLE_LTO flag apply LTO to C/C++ compile flags too (#38959) 2021-08-21 14:30:42 -07:00
Kuba (Brecka) Mracek
2fad6265fe When building stdlib, pass -prespecialize-generic-metadata from CMake, and respect the flag in IRGenModule::shouldPrespecializeGenericMetadata (#38946) 2021-08-20 07:58:39 -07:00
Arnold Schwaighofer
71f64ac348 Add option to enable global-isel on arm64 archs
LLVM will eventually switch over to using global-isel on arm64 archs.
Setting this option (SWIFT_ENABLE_GLOBAL_ISEL_ARM64) can be used to experiment
with that in Swift before the switch happens.
2021-08-17 13:41:46 -07:00
Argyrios Kyrtzidis
35f0744b1c [CMake] Declare the precise dependencies of the gyb custom command invocations 2021-08-10 13:51:54 -07:00
Eric Miotto
ec912086b8 [gardening] break long comment lines (#38444)
Takes review feedback from #38415
2021-07-19 07:50:19 -07:00
Eric Miotto
66bd9f80b4 [build] explicitly set OSX_ARCHITECTURES for targets in stdlib
Our custom build code already sets the architecture of compilation
commands by different means, and so far we were relying on setting
`CMAKE_OSX_ARCHITECTURES` to an empty value to avoid CMake doing the
same.

However, on Apple Silicon, CMake 3.19+ enforces a default value in this
scenario
(https://gitlab.kitware.com/cmake/cmake/-/merge_requests/5291/diffs),
and this would result in the inability to compile code for x86_64.

Addresses SR-14035, rdar://80613594
2021-07-15 15:18:43 -07:00
3405691582
c0c93fa0bc [cmake] Copy Dispatch to the SDK subdir on host.
We have two directories for Swift libraries,
* `SWIFT_SDK_<platform>_LIB_SUBDIR`, a.k.a., the SDK subdir,
  a.k.a., `swift-<platform>-<arch>/lib/swift/<platform>`, and
* `SWIFTLIB_SINGLE_SUBDIR`,
  a.k.a., `swift-<platform>-<arch>/lib/swift/<platform>/<arch>`.

Through the Swift build, libraries are emitted to both
`.../lib/swift/<platform>` and `.../lib/swift/<platform>/<arch>`.
However, when building toolchains, only `.../lib/swift/<platform>/` is
populated with libraries.

None of this normally isn't a problem; the Swift libraries do not have
inherent interdependencies. This however changes with Concurrency:
Concurrency has an implicit dependency on libdispatch.

When Swift is built, we have two copies of `libswift_Concurrency.so`:
one in `.../lib/swift/<platform>` and one in
`.../lib/swift/<platform>/<arch>`. Prior to this commit, we
unconditionally copy `libdispatch.so` and `libBlocksRuntime.so` to only
_one_ place -- that is, `.../lib/swift/<platform>/<arch>`.

swiftc emits binaries on ELF systems with an rpath of
`.../lib/swift/<platform>`. These binaries implicitly import
Concurrency, so they link against `libswift_Concurrency.so` (whether
they use Concurrency features or not). The library's `$ORIGIN` is
searched to find `libdispatch.so`.

Now, nothing breaks on Linux because there the loader, when given an
rpath, searches both `.../lib/swift/<platform>` and
`.../lib/swift/<platform>/<arch>` even though the rpath only specifies
one directory..

However, on other platforms, only the given rpath is searched.
`libdispatch.so` does not reside next to `libswift_Concurrency.so`
because it has been copied to  `.../lib/swift/<platform>/<arch>`; not in
the rpath.

There are a few ways to solve this: change the way rpaths are
configured, only emit libraries into one place, copy `libdispatch.so`
only to the path matching the rpath, or copy `libdispatch.so` wherever
`libswift_Concurrency.so` is copied,

Because the toolchain file layout is different to the file layout when
only Swift is built, hacking the rpath is brittle. Presumably, the
reason why we have a `libswift_Concurrency.so` residing in two places is
to support builds where multiple architectures are supported in the one
build directory, so we cannot just copy `libdispatch.so` _only_ to
`.../lib/swift/<platform>`.

Ultimately, We need to ensure that every instance where
`libswift_Concurrency.so` can be used has `libdispatch.so` residing next
to it, which we do here.

Note that this implicit dependency resolution would not happen unless we
added a `-ldispatch` flag to make this all work, but other platforms are
instaed using `$ORIGIN` to get the search to work properly, so we also
do this for OpenBSD in this commit.
2021-06-08 22:20:47 -04:00
Konrad `ktoso` Malawski
6008b32789 [Distributed] initial distributed support, fixed availability (#37650)
* [Distributed] Initial distributed checking

* [Distributed] initial types shapes and conform to DistributedActor

* [Distributed] Require Codable params and return types

* [Distributed] initial synthesis of fields and constructors

* [Distributed] Field and initializer synthesis

* [Distributed] Codable requirement on distributed funcs; also handle <T: Codable>

* [Distributed] handle generic type params which are Codable in dist func

[Distributed] conformsToProtocol after all

* [Distributed] Implement remote flag on actors

* Implement remote flag on actors

* add test

* actor initializer that sets remote flag

[Distributed] conformances getting there

* [Distributed] dont require async throws; cleanup compile tests

* [Distributed] do not synthesize default implicit init, only our special ones

* [Distributed] properly synth inits and properties; mark actorTransport as _distributedActorIndependent

Also:

- do not synthesize default init() initializer for dist actor

* [Distributed] init(transport:) designated and typechecking

* [Distributed] dist actor initializers MUST delegate to local-init

* [Distributed] check if any ctors in delegation call init(transport:)

* [Distributed] check init(transport:) delegation through many inits; ban invoking init(resolve:using:) explicitly

* [Distributed] disable IRGen test for now

* [Distributed] Rebase cleanups

* [Concurrent] transport and address are concurrent value

* [Distributed] introduce -enable-experimental-distributed flag

* rebase adjustments again

* rebase again...

* [Distributed] distributed functions are implicitly async+throws outside the actor

* [Distributed] implicitly throwing and async distributed funcs

* remove printlns

* add more checks to implicit function test

* [Distributed] resolve initializer now marks the isRemote actor flag

* [Distributed] distributedActor_destroy invoked instead, rather than before normal

* [Distributed] Generate distributed thunk for actors

* [distributed] typechecking for _remote_ functions existing, add tests for remote funcs

* adding one XFAIL'ed task & actor lifetime test

The `executor_deinit1` test fails 100% of the time
(from what I've seen) so I thought we could track
and see when/if someone happens to fix this bug.

Also, added extra coverage for #36298 via `executor_deinit2`

* Fix a memory issue with actors in the runtime system, by @phausler

* add new test that now passes because of patch by @phausler

See previous commit in this PR.
Test is based on one from rdar://74281361

* fix all tests that require the _remote_ function stubs

* Do not infer @actorIndependent onto `let` decls

* REVERT_ME: remove some tests that hacky workarounds will fail

* another flaky test, help build toolchain

* [Distributed] experimental distributed implies experimental concurrency

* [Distributed] Allow distributed function that are not marked async or throws

* [Distributed] make attrs SIMPLE to get serialization generated

* [Distributed] ActorAddress must be Hashable

* [Distributed] Implement transport.actorReady call in local init

* cleanup after rebase

* [Distributed] add availability attributes to all distributed actor code

* cleanup - this fixed some things

* fixing up

* fixing up

* [Distributed] introduce new Distributed module

* [Distributed] diagnose when missing 'import _Distributed'

* [Distributed] make all tests import the module

* more docs on address

* [Distributed] fixup merge issues

* cleanup: remove unnecessary code for now SIMPLE attribute

* fix: fix getActorIsolationOfContext

* [Distributed] cmake: depend on _concurrency module

* fixing tests...

* Revert "another flaky test, help build toolchain"

This reverts commit 83ae6654dd.

* remove xfail

* clenup some IR and SIL tests

* cleanup

* [Distributed] fix cmake test and ScanDependencies/can_import_with_map.swift

* [Distributed] fix flags/build tests

* cleanup: use isDistributed wherever possible

* [Distributed] don't import Dispatch in tests

* dont link distributed in stdlib unittest

* trying always append distributed module

* cleanups

* [Distributed] move all tests to Distributed/ directory

* [lit] try to fix lit test discovery

* [Distributed] update tests after diagnostics for implicit async changed

* [Distributed] Disable remote func tests on Windows for now

* Review cleanups

* [Distributed] fix typo, fixes Concurrency/actor_isolation_objc.swift

* [Distributed] attributes are DistributedOnly (only)

* cleanup

* [Distributed] cleanup: rely on DistributedOnly for guarding the keyword

* Update include/swift/AST/ActorIsolation.h

Co-authored-by: Doug Gregor <dgregor@apple.com>

* introduce isAnyThunk, minor cleanup

* wip

* [Distributed] move some type checking to TypeCheckDistributed.cpp

* [TypeCheckAttr] remove extra debug info

* [Distributed/AutoDiff] fix SILDeclRef creation which caused AutoDiff issue

* cleanups

* [lit] remove json import from lit test suite, not needed after all

* [Distributed] distributed functions only in DistributedActor protocols

* [Distributed] fix flag overlap & build setting

* [Distributed] Simplify noteIsolatedActorMember to not take bool distributed param

* [Distributed] make __isRemote not public

* [Distributed] Fix availability and remove actor class tests

* [actorIndependent] do not apply actorIndependent implicitly to values where it would be illegal to apply

* [Distributed] disable tests until issue fixed

Co-authored-by: Dario Rexin <drexin@apple.com>
Co-authored-by: Kavon Farvardin <kfarvardin@apple.com>
Co-authored-by: Doug Gregor <dgregor@apple.com>
2021-05-28 07:22:03 +09:00
Eric Miotto
3b80a766ac [cmake] explicitly set linker language for static libraries (#37642)
This mimicks the same logic used for shared libraries a few lines above.

This will allow the minimal freestanding stdlib to build with #37511, solving errors like

```
ninja: error: build.ninja:4213: multiple rules generate stdlib/public/SwiftOnoneSupport/CMakeFiles/
swiftSwiftOnoneSupport-freestanding-x86_64-static.dir/__/__/
linker-support/magic-symbols-for-install-name.c.o [-w dupbuild=err]
```

Addresses rdar://78336832
2021-05-26 08:12:51 -07:00
Karoy Lorentey
9cf28dffa2 [SDK] Remove the obsolete XCTest overlay
The actual XCTest overlay has not been maintained in this repository for years. (It is distributed in Xcode (libXCTestSwiftSupport.dylib), along with XCTest.framework itself.)

The code we have here is badly out of date, and the fact that we have it on the module path in CI makes it interfere with the contents of recent SDKs.

Remove the XCTest overlay from this repository; pick it up from the SDK instead.

rdar://76915582
2021-05-21 17:21:12 -07:00
Konrad `ktoso` Malawski
0c75bd2a39 Revert Initial distributed, some issues to be fixed first (#37556)
* Revert "[Distributed] disable tests until issue fixed"

This reverts commit 0a04278920.

* Revert "[Distributed] Initial `distributed` actors and functions and new module (#37109)"

This reverts commit 814ede0cf3.
2021-05-21 19:28:48 +09:00
Konrad `ktoso` Malawski
814ede0cf3 [Distributed] Initial distributed actors and functions and new module (#37109)
* [Distributed] Initial distributed checking

* [Distributed] initial types shapes and conform to DistributedActor

* [Distributed] Require Codable params and return types

* [Distributed] initial synthesis of fields and constructors

* [Distributed] Field and initializer synthesis

* [Distributed] Codable requirement on distributed funcs; also handle <T: Codable>

* [Distributed] handle generic type params which are Codable in dist func

[Distributed] conformsToProtocol after all

* [Distributed] Implement remote flag on actors

* Implement remote flag on actors

* add test

* actor initializer that sets remote flag

[Distributed] conformances getting there

* [Distributed] dont require async throws; cleanup compile tests

* [Distributed] do not synthesize default implicit init, only our special ones

* [Distributed] properly synth inits and properties; mark actorTransport as _distributedActorIndependent

Also:

- do not synthesize default init() initializer for dist actor

* [Distributed] init(transport:) designated and typechecking

* [Distributed] dist actor initializers MUST delegate to local-init

* [Distributed] check if any ctors in delegation call init(transport:)

* [Distributed] check init(transport:) delegation through many inits; ban invoking init(resolve:using:) explicitly

* [Distributed] disable IRGen test for now

* [Distributed] Rebase cleanups

* [Concurrent] transport and address are concurrent value

* [Distributed] introduce -enable-experimental-distributed flag

* rebase adjustments again

* rebase again...

* [Distributed] distributed functions are implicitly async+throws outside the actor

* [Distributed] implicitly throwing and async distributed funcs

* remove printlns

* add more checks to implicit function test

* [Distributed] resolve initializer now marks the isRemote actor flag

* [Distributed] distributedActor_destroy invoked instead, rather than before normal

* [Distributed] Generate distributed thunk for actors

* [distributed] typechecking for _remote_ functions existing, add tests for remote funcs

* adding one XFAIL'ed task & actor lifetime test

The `executor_deinit1` test fails 100% of the time
(from what I've seen) so I thought we could track
and see when/if someone happens to fix this bug.

Also, added extra coverage for #36298 via `executor_deinit2`

* Fix a memory issue with actors in the runtime system, by @phausler

* add new test that now passes because of patch by @phausler

See previous commit in this PR.
Test is based on one from rdar://74281361

* fix all tests that require the _remote_ function stubs

* Do not infer @actorIndependent onto `let` decls

* REVERT_ME: remove some tests that hacky workarounds will fail

* another flaky test, help build toolchain

* [Distributed] experimental distributed implies experimental concurrency

* [Distributed] Allow distributed function that are not marked async or throws

* [Distributed] make attrs SIMPLE to get serialization generated

* [Distributed] ActorAddress must be Hashable

* [Distributed] Implement transport.actorReady call in local init

* cleanup after rebase

* [Distributed] add availability attributes to all distributed actor code

* cleanup - this fixed some things

* fixing up

* fixing up

* [Distributed] introduce new Distributed module

* [Distributed] diagnose when missing 'import _Distributed'

* [Distributed] make all tests import the module

* more docs on address

* [Distributed] fixup merge issues

* cleanup: remove unnecessary code for now SIMPLE attribute

* fix: fix getActorIsolationOfContext

* [Distributed] cmake: depend on _concurrency module

* fixing tests...

* Revert "another flaky test, help build toolchain"

This reverts commit 83ae6654dd.

* remove xfail

* clenup some IR and SIL tests

* cleanup

* [Distributed] fix cmake test and ScanDependencies/can_import_with_map.swift

* [Distributed] fix flags/build tests

* cleanup: use isDistributed wherever possible

* [Distributed] don't import Dispatch in tests

* dont link distributed in stdlib unittest

* trying always append distributed module

* cleanups

* [Distributed] move all tests to Distributed/ directory

* [lit] try to fix lit test discovery

* [Distributed] update tests after diagnostics for implicit async changed

* [Distributed] Disable remote func tests on Windows for now

* Review cleanups

* [Distributed] fix typo, fixes Concurrency/actor_isolation_objc.swift

* [Distributed] attributes are DistributedOnly (only)

* cleanup

* [Distributed] cleanup: rely on DistributedOnly for guarding the keyword

* Update include/swift/AST/ActorIsolation.h

Co-authored-by: Doug Gregor <dgregor@apple.com>

* introduce isAnyThunk, minor cleanup

* wip

* [Distributed] move some type checking to TypeCheckDistributed.cpp

* [TypeCheckAttr] remove extra debug info

* [Distributed/AutoDiff] fix SILDeclRef creation which caused AutoDiff issue

* cleanups

* [lit] remove json import from lit test suite, not needed after all

* [Distributed] distributed functions only in DistributedActor protocols

* [Distributed] fix flag overlap & build setting

* [Distributed] Simplify noteIsolatedActorMember to not take bool distributed param

* [Distributed] make __isRemote not public

Co-authored-by: Dario Rexin <drexin@apple.com>
Co-authored-by: Kavon Farvardin <kfarvardin@apple.com>
Co-authored-by: Doug Gregor <dgregor@apple.com>
2021-05-21 09:12:29 +09:00
Dario Rexin
1ae371b470 Re-add dependency on libatomic for 32-bit Linux platforms (#36659) 2021-03-31 13:31:58 -07:00
Michael Gottesman
24f6c799b6 [cmake] Add support for building the swift stdlib with LTO.
This is controlled with the option SWIFT_STDLIB_ENABLE_LTO=thin|full.
2021-03-24 12:18:35 -07:00
Dario Rexin
51bdfa1919 [Concurrency] Build C-only libdispatch as part of Swift build (#35837)
* [Concurrency] Build C-only libdispatch as part of Swift build
2021-02-09 14:24:52 -08:00
buttaface
e6f5913772 [android] Move to the NDK's unified sysroot (#34491)
Since the NDK removes the platforms/ and sysroot/ directories in the latest NDK
22, switch to the unified sysroot in toolchains/llvm/ and take advantage of a
bunch of simplification that's now possible.
2021-02-07 09:19:18 -08:00
Robert Widmann
b436825948 Trade Usages of -m${platform}-version-min For -target
There's no reason to use -m${platform}-version-min as of clang-11/Xcode 11. Clang is now smart enough to parse -target and provide Apple's ld with the appropriate -platform_version argument string.
2021-01-13 11:00:39 -08:00
swift-ci
186717f583 Merge pull request #34628 from buttaface/native-clang 2021-01-06 15:54:22 -08:00
Butta
d4797537d3 [build] Remove redundant block applying '-mcx16' flag again for Android x86_64 2020-12-18 08:33:24 +05:30
Ben Langmuir
9422c4b213 [cmake] Avoid passing -mcx16 to non-x86_64 compilations
We were checking the host instead of the target compiler, causing many
warnings about passing -mcx16 while building the runtime for arm.
2020-12-15 13:23:20 -08:00
Butta
c74884ce30 [build] Make it possible to actually build the stdlib with a prebuilt clang 2020-12-13 18:22:33 +05:30
John McCall
c346d94655 Fix the build and implementation of the 16-byte atomics for MSVC.
Credit for the cmake fix here goes to Saleem Abdulrasool.

The substantive fix is embarrassing; I didn't pay close attention
to the intrinsic's argument order and just assumed that the first
argument for the replacement value was the low half (the part
you'd find at index 0 if it were an array), but in fact it's the
high half (the part you'd find at index 1).

I also change the code to be much more reinterpret_casty, which
isolates the type-punning mostly "within" the intrinsic, and
which seems to match how other code uses it.
2020-12-04 01:51:29 -05:00
Butta
8574fe7204 [build] Remove remaining dependencies on libatomic, for Android, BSD and Haiku
Follow suit from linux, #29581, tested on Android.
2020-11-16 10:16:12 +05:30