The numerics of these operations is fairly subtle, and the overflow boundaries are somewhat surprising, so additional test coverage isn't a bad thing (also gives us an excuse to exercise Int128 more)
A vestigial remnant of it was left behind after
06921cfe84 in order to avoid a reverse
condfail when building old swiftinterfaces that define
```swift
func _copy<T>(_ value: T) -> T {
#if $BuiltinCopy
Builtin.copy(value)
#else
value
#endif
}
```
If the language feature is removed, though, such interfaces should again
be buildable because the branch where the language feature isn't defined
should be expanded.
rdar://127516085
The copy operator has been implemented and doesn't use it. Remove
`Builtin.copy` and `_copy` as much as currently possible.
Source compatibility requires that `_copy` remain in the stdlib. It is
deprecated here and just uses the copy operator.
Handling old swiftinterfaces requires that `Builtin.copy` be defined.
Redefine it here as a passthrough--SILGen machinery will produce the
necessary copy_addr.
rdar://127502242
The layout of a computed key path component carries an argument buffer for captures, which has
the following layout:
```
---
captured values (subscript indices)
---
generic arguments
---
```
When we reference an externally-defined public property or subscript from a key path, and the
external declaration has a property descriptor, then the generic arguments for the external
declaration get appended to the end of this buffer, giving:
```
---
captured values (subscript indices)
---
generic arguments
---
external property's generic arguments
---
```
The convention for key path accessors to bind their generic environment is thus to unpack them
from the end of the argument buffer, so that the external keypath's accessors can find the
arguments to bind the external generic environment while still allowing the enclosing key path
to save the original captured generic environment (which may be necessary to capture the
appropriate conditional and/or retroactive `Equatable` and `Hashable` conformances for
subscript indices).
However, our code generation for binding the generic arguments out of the argument buffer
contained a flawed optimization: for a property, we know there are never any captured values,
so I had assumed that the generic parameters could always be bound from the beginning of the
argument buffer, assuming that the generic parameters make up the totality of the buffer. This
falls over for external property descriptor references when the key path itself captures a
generic environment, since the external property's expected generic environment appears after
the key path's original generic environment. We can fix this by removing the conditional
entirely, and always adjusting the offset we load the generic environment from to look at the
end of the buffer. Fixes rdar://125886333.
This change introduces a new compilation target platform to the Swift compiler - visionOS.
- Changes to the compiler build infrastrucuture to support building compiler-adjacent artifacts and test suites for the new target.
- Addition of the new platform kind definition.
- Support for the new platform in language constructs such as compile-time availability annotations or runtime OS version queries.
- Utilities to read out Darwin platform SDK info containing platform mapping data.
- Utilities to support re-mapping availability annotations from iOS to visionOS (e.g. 'updateIntroducedPlatformForFallback', 'updateDeprecatedPlatformForFallback', 'updateObsoletedPlatformForFallback').
- Additional tests exercising platform-specific availability handling and availability re-mapping fallback code-path.
- Changes to existing test suite to accomodate the new platform.
type(of:) now returns the dynamic type of the contents of
an extended existential (just like it does for a regular existential)
Mirror can now reflect fields of a value stored inside an extended
existential (just like it can with a regular existential). This
requires type(of:) support, since Mirror internals use that to
determine how to reflect a value.
Resolves rdar://102906195
WebAssembly does not support _Float16 type, so we need to guard the use
of the type. Unfortunately, Clang does not provide a good way to detect
the support of _Float16 type at compile time, so just disable for wasm
targets.
We can easily test all 2**16 values, so let's do it. Also now _Float16 is properly supported in clang, so we can pass arguments to CPP that way, which lets us get snan right on more platforms.
These two edge cases were fixed in https://github.com/apple/swift/pull/71369, and fail when run against an older standard library. Ensure they run only against a Swift 6.0 or newer stdlib
Addresses rdar://123810713
1. I added a file with some tests [test/stdlib/FlattenDistanceFromTo.swift].
2. I used [test/stdlib/StaticBigInt.swift] as the template for the new file.
Github PR #71620 mixed up one of the bincompat conditionals.
It also had some errors in the tests for ObjC interop.
For now, this leaves the legacy behavior in place for
all Apple platforms.
Two new symbols:
`void std::__detail::__variant::__erased_ctor<std::monostate&, std::monostate&&>(void*, void*)`
`void std::__detail::__variant::__erased_assign<std::monostate&, std::monostate&&>(void*, void*)`
Likely added from #71627.
`swift_willThrow` is called with an error right before it is thrown.
This existing entrypoint requires an already-boxed error existential;
with typed errors, we don't have the error existential on hand, so we
would need to allocate the box to throw a typed error. That's not okay.
Introduce a new `swift_willThrowTypedImpl` entry point into the runtime
that will first check for the presence of an error handler and, if one
is present, box the error to provide to the error handler. This
maintains the no-allocations path for typed errors while still
allowing existing error handlers to work.
This new entrypoint isn't available on older Swift runtimes, so create
a back-deployable shim called by the compiler. On new-enough platforms,
this will call through to `swift_willThrowTypedImpl`. On older
platforms, we drop the error and don't call the registered will-throw
handler at all. This is a compromise that avoids boxing when throwing
typed errors, at the cost of a slightly different experience for this
new feature on older runtimes.
Fixes rdar://119828459.
- Changed 128 integer literal to Int(Int8.max)+1 in unit tests (Int8.Stride is Int).
Co-authored-by: Guillaume Lessard <glessard@users.noreply.github.com>
