Include the parent `ModuleDecl` when serializing a `SILFunction` so that it is available on deserialized functions even though the full `DeclContext` is not present. With the parent module always available we can reliably compute whether the `SILFunction` comes from a module that was imported `@_weakLinked`.
Serialize the `DeclContext` member of `SILFunction` so that it can be used to look up the module that a function belongs to in order to compute weak import status.
Resolves rdar://98521248
Many deserialization failures at this points are caused by archives
installed over the SDK. Let's extend the current error message with a
solution for such a case.
rdar://86280699
This is exactly like copy_addr except that it is not viewed from the verifiers
perspective as an "invalid" copy of a move only value. It is intended to be used
in two contexts:
1. When the move checker emits a diagnostic since it could not eliminate a copy,
we still need to produce valid SIL without copy_addr on move only types since we
will hit canonical SIL eventually even if we don't actually codegen the SIL. The
pass can just convert said copy_addr to explicit_copy_addr and everyone is
happy.
2. To implement the explicit copy function for address only types.
The effect of declaring an import `@_weakLinked` is to treat every declaration from the module as if it were declared with `@_weakLinked`. This is useful in environments where entire modules may not be present at runtime. Although it is already possible to instruct the linker to weakly link an entire dylib, a Swift attribute provides a way to declare intent in source code and also opens the door to diagnostics and other compiler behaviors that depend on knowing that all the module's symbols will be weakly linked.
rdar://96098097
This attribute will, in the near future, be used to inform IRGen that a nominal type that conforms to such protocol must have its type metadata always emitted into the binary, regardless of whether it is used/public.
Trivial conflict caused by the line above the
`IGM.constructInitialFnAttributes` change in `lib/IRGen/GenDecl.cpp`
having an extra argument passed in rebranch (due to the new LLVM API).
Specifically this means that rather than always being owned, we now have owned
and guaranteed versions of copyable_to_moveonlywrapper. Similar to
moveonlywrapper_to_copyable, one chooses which variant one gets by using
specific SILBuilder APIs:
create{Owned,Guaranteed}CopyableToMoveOnlyWrapperValueInst. It is still
forwarding and the rest of the forwarding APIs work as expected except that the
forwarding ownership is fixed (and an assertion will result if one attempts to
do so).
NOTE: It is assumed that trivial operands are always passed to the owned
variant.
Local types are not ABI, and the only time we care about the mangling here is
when we look them up using the DWARF mangling in debug info, which doesn't
respect @_originallyDefinedIn either.
Fixes https://github.com/apple/swift/issues/59773.
Use only the SWIFT_COMPILER_VERSION macro to check for swiftmodules
being written by the same compiler that reads it. In practice, it's the
macro used for release builds of the compiler.
rdar://96868333
Since I am beginning to prepare for adding real move only types to the language,
I am renaming everything that has to do with copyable types "move only wrapped"
values instead of move only. The hope is this reduces/prevents any confusion in
between the two.
