Building in incremental mode incurs the overhead associated with the
incremental dependency tracking infrastructure. Considering we're
throwing away all of this stuff anyways, let's just build in WMO to
avoid that.
Building each Swift module explicitly requires dependency PCMs to be built
with the exactly same deployment target version. This means we may need to
build a Clang module multiple times with different target triples.
This patch removes the -target arguments from the reported PCM build
arguments and inserts extraPcmArgs fields to each Swift module.
swift-driver can combine the generic PCM arguments with these extra arguments
to get the command suitable for building a PCM specifically for
that loading Swift module.
Now that it no longer needs to handle the
parse-only case, we can simplify things by having
`performSema` call into
`performParseAndResolveImportsOnly`.
Most clients were only using it to populate the
main module with files, which is now done by
`getMainModule`. Instead, they can now just rely
on parsing happening lazily.
Rather than waiting until one of the performXXX
methods are called, make sure all the main module's
files have been populated up-front by
`getMainModule`.
Lift the `DisablePoundIfEvaluation` parsing option
into `LangOptions` to subsume the need for the
`EvaluateConditionals` parameter, and sink the
computation of `CanDelayBodies` down into
`createSourceFileForMainModule`.
To support -disable-implicit-swift-modules, the explicitly built modules
are passed down as compiler arguments. We need this new module loader to
handle these modules.
This patch also stops ModuleInterfaceLoader from building module from interface
when -disable-implicit-swift-modules is set.
Rather than replacing the code completion file
on the `CompilerInstance` whenever we do a cached
top-level completion, let's set a new main module
instead.
This allows us to properly update the
`LoadedModules` map, and allows the retrieval of
the code completion file to be turned into a
request.
Remove the `PrimarySourceFiles` vector from the
frontend and replace it with a request on
ModuleDecl that retrieves the primary files for
the main module.
This is in preparation for having
`CompilerInstance::getMainModule` automatically
populate the main module with files when queried.
Rather than trying to continue the compilation
with an empty main module, let's bail out early if
we expect an implicit stdlib import and fail to
load in the stdlib.
This default formatting style remains the same "LLVM style". "Swift style"
is what was previously enabled via -enable-experimental-diagnostic-formatting
Module interface builder used to maintain a separate compiler instance for
building Swift modules. The configuration of this compiler instance is also
useful for dependencies scanner because it needs to emit front-end compiler invocation
for building Swift modules explicitly.
This patch refactor the configuration out to a delegate class, and the
delegate class is also used by the dependency scanner.
Additional flags in interface files may change parsing behavior like #if
statements. We should use a fresh ASTContext with these additional
flags when parsing interface files to collect imports.
rdar://62612027
