- Renames ExperimentalPlatformCCallingConvention to
PlatformCCallingConvention.
- Removes non-arm calling convention support as this feature is working
around a clang bug for some arm triples which we hope to see resolved.
- Removes misleading MetaVarName from platform-c-calling-convention
argument.
- Replaces other uses of LLVM::CallingConv::C with
IGM.getOptions().PlatformCCallingConvention().
* Add @_used and @_section attributes for global variables and top-level functions
This adds:
- @_used attribute that flags as a global variable or a top-level function as
"do not dead-strip" via llvm.used, roughly the equivalent of
__attribute__((used)) in C/C++.
- @_section("...") attribute that places a global variable or a top-level
function into a section with that name, roughly the equivalent of
__attribute__((section("..."))) in C/C++.
When `-unavailable-decl-optimization=complete` is specified, skip emission of
resilient tag indices for enum cases that are marked unavailable with
`@available`.
Resolves rdar://109805050
The main change here is in IRGen which needs to be able to emit constant enum values.
Use `emitValueInjection` to create the enum constant.
Usually this method creates code in the current function.
But if all arguments to the enum are constant, the builder never has to emit an instruction.
Instead it can constant fold everything and just returns the final constant.
Also, create statically initialized let-globals as constant global (`constant` instead of `global`).
When `-unavailable-decl-optimization=complete` is specified, exclude
unavailable enum cases from the runtime layout of enums with payloads. Without
this, the type metadata for unavailable types may be referenced by enum cases
with unavailable payloads and cause linker failures.
Resolves rdar://107483852
When expanding a conformance macro, the generated extension decls are added to
the TopLevelDecls vector of the synthesized file unit to expose them to
sf->getSynthesizedFile()->getTopLevelDecls(). There are two problems with this:
1. These decls are also visited via visitAuxiliaryDecls() for the purpose of
type checking. This causes problems in code generation because the extensions
are visited separately, and because SIL and IRGen assume nested auxiliary decls
are members.
2. SILGen only emits top-level decls directly from the source file rather than its
synthesized file. Auxiliary decls are visited here, but this doesn't work for
nested conformance macros because the attached-to decl is not at the top-level,
so macro-generated conformances for nested types never emit their descriptor.
To fix this in the short term, visit top-level decls in the synthesized file that are
generated by conformance macros, and skip auxiliary extension decls when emitting type
members. This fix is narrowly scoped to only impact macros, but in the future this
warrants a more structural fix to better handle top-level decls in the synthesized file.
Partially address the incorrect handling for the `#dsohandle` on
Windows.
We were previously emitting a local definition for this external
constant, and worse yet, not marking the definition for COMDAT. It is
unclear what definition would win ultimately (implementation defined),
as we had a definition as well as the linker synthesized value. We can
change the SIL linkage for this type to `DefaultForDeclaration` which
will give it `available_externally` and default visibility and storage
which is closer to what we desire. However, because we do not track the
LLVM variables and apply heuristics for lowering the
`SILGlobalVariable`, we would attribute it with imported DLL Storage.
This would then cause us to fail at link time (amusingly enough link.exe
will report a LNK1000). Special case the variable and track that we are
targeting a windows environment in the `UniversalLinkageInfo` so that we
do not special case this on other platforms.
This also has the nice side effect of allowing us to remove the special
case in the TBD handling.
Fixes: #64741
This fixes an ld warning:
```
ld: warning: Could not find or use auto-linked library ‘swiftstd’
```
`swiftstd` was renamed to `swiftCxxStdlib`. We were still trying to link with `swiftstd` for some time to allow building with hosttools and to keep the CI green, however a new toolchain was released since the module was renamed, so this is no longer needed.
rdar://107412807
We'd still like to try to be forwardly compatible with future runtimes
that do properly handle noncopyable types, so emit them in a separate section from
copyable type records for now. This should prevent `_typeByName` from letting
someone get a hold of a noncopyable type's metatype as a (copyable) `Any.Type` and
then trying to use it to copy uncopyable values.
Always use `Decl::visitAuxiliaryDecls` to visit decls produced by macros, including peer macros and declaration macros. Use name-driven expansion for peer macros. Remove `MacroExpansionDecl::getRewritten()`.
Also make `ExpandMacroExpansionDeclRequest` cache the buffer ID (similar to other macros) instead of an array of decls.
Previously enum AccessLimitKind was
added to distinguish access scopes b/t package and public while keeping
DeclContext null but it proved to be too limiting. This PR creates package specific entries for DeclContext and
ASTHierarchy. It create a new class PackageUnit that can be set as the parent DeclContext of ModuleDecl. This PR
contains addition of such entries but not the use of them; the actual use of them will be in the upcoming PRs.
Resolves rdar://106155600
rdar://105837040
* WIP: Store layout string in type metadata
* WIP: More cases working
* WIP: Layout strings almost working
* Add layout string pointer to struct metadata
* Fetch bytecode layout strings from metadata in runtime
* More efficient bytecode layout
* Add support for interpreted generics in layout strings
* Layout string instantiation, take and more
* Remove duplicate information from layout strings
* Include size of previous object in next objects offset to reduce number of increments at runtime
* Add support for existentials
* Build type layout strings with StructBuilder to support target sizes and metadata pointers
* Add support for resilient types
* Properly cache layout strings in compiler
* Generic resilient types working
* Non-generic resilient types working
* Instantiate resilient type in layout when possible
* Fix a few issues around alignment and signing
* Disable generics, fix static alignment
* Fix MultiPayloadEnum size when no extra tag is necessary
* Fixes after rebase
* Cleanup
* Fix most tests
* Fix objcImplementattion and non-Darwin builds
* Fix BytecodeLayouts on non-Darwin
* Fix Linux build
* Fix sizes in linux tests
* Sign layout string pointers
* Use nullptr instead of debug value
The C++ standard library module `std` is being renamed to `CxxStdlib`, and `swiftstd` binary is being renamed to `swiftCxxStdlib`.
This change teaches IRGen to link with the newly renamed binary.
