These were added to guard specific source code in swift interface files for older compilers.
They do not guard any experimental language feature specifically.
Turn them on by default to prevent unnecessary flags developers need to add in their configs.
SwiftVerifyEmittedModuleInterface job is configured to be built within
the SubInvocation and it needs to inherit the caching replay prefix map
in order to load macro plugin library correctly.
rdar://158692095
This is a diagnostic that is only really emitted as a fallback when
the constraint system isn't able to better diagnose the expression.
It's not particulary helpful for the user, and can be often be
misleading since the underlying issue might not actually be an
ambiguity, and the user may well already have a type annotation. Let's
instead just emit the fallback diagnostic that we emit in all other
cases, asking the user to file a bug.
This fixes a runtime crash when a `weak` reference to a C++ foreign reference type is used.
Instead of a runtime crash, Swift would now emit a compiler error saying that `weak` keyword is incompatible with foreign reference types.
rdar://124040825 / resolves https://github.com/swiftlang/swift/issues/83080
Part of the Embedded Swift linkage model, this attribute ensures that
the function it applies to has a strong definition in its owning
module, and that its SIL is never serialized. That way, other modules
will not have access to its definition.
Implements rdar://158364184.
When Embedded Swift emits a symbol that was imported from another
module, ensure that the symbol is emitted as a weak definition. This
way, importing the same module (and using its symbol) into several
different modules doesn't cause duplicate-symbol errors at link time.
Rather, the linker will merge the different symbol definitions. This
makes Embedded Swift libraries work without resorting to
`-mergeable-symbols` or `-emit-empty-object-file`.
Lift the limitation of a single active diagnostic, which was a pretty
easy-to-hit footgun. We now maintain an array of active in-flight
diagnostics, which gets flushed once all them have ended.
Cache the result of turning a `ValueDecl` into an `AvailabilityDomain`. Use
split caching to make the common case of the decl not representing an
availability domain efficient.
NFC.
This moves the functionality of 'bridgeClangModuleDependency' into a utility in the main scanner class because it relies on various objects whose lifetime is already tied to the scanner itself.
The SIL optimizer has fundamental bugs that result in dropping non-Copyable
struct & enum the deinitializers.
Fix this by
1. correctly representing the ownership of struct & enum values that are
initialized from trivial values.
2. checking move-only types before deleting forwarding instructions.
These bugs block other bug fixes. They are exposed by other unrelated SIL
optimizations to SIL. I'm sure its possible to expose the bugs with source-level
tests, but the current order of inlining and deinit devirtualization has been
hiding the bugs and complicates reproduction.
For a method key path use the locator for the apply itself rather
than the member, ensuring we handle invalid cases where the apply is
the first component, and providing more accurate location info.
Release/retain functions for C++ foreign reference types might return a reference count as an integer value.
Swift previously emitted an error for such functions, saying that the retain/release functions need to return void or a reference to the value.
rdar://157853183
Afteri #83712 landed, let's make another try enabling addressable
parameters by default.
This reverts commit 61d60eb6ad, reversing
changes made to 670f69eadc.
