LLVM's lit implementation switched to use process pools in r299775.
This exposed some pickling problems in Swift's lit files. For a function
or class to be pickle-able, it has to be in the top-level of a real
Python module.
* The SwiftTest lit format class was embedded in the lit.cfg file, so
I moved it out to a separate Python file.
* The inferSwiftBinary function was being stashed in the
config.inferSwiftBinary field and later used to find tools for SourceKit
testing. I moved the config settings for those tools into the top-level
lit.cfg file. I expect this will cause warnings about them not existing
in some cases, but that should be fairly harmless. Maybe someone can
come up with a better solution later.
* The config.substitutions for SourceKit's lit.local.cfg was storing a
reference to an embedded sed_clean function, which just returned a
constant string. I changed the function to be a string, using Python's
raw string feature to avoid the problems that likely led to it being a
function in the first place. (Just guessing.)
- Add CompilerInvocation::getPCHHash
This will be used when creating a unique filename for a persistent
precompiled bridging header.
- Automatically generate and use a precompiled briding header
When we're given both -import-objc-header and -pch-output-dir
arguments, we will try to:
- Validate what we think the PCH filename should be for the bridging
header, based on the Swift PCH hash and the clang module hash.
- If we're successful, we'll just use it.
- If it's out of date or something else is wrong, we'll try to
emit it.
- This gives us a single filename which we can `stat` to check for the
validity of our code completion cache, which is keyed off of module
name, module filename, and module file age.
- Cache code completion results from imported modules
If we just have a single .PCH file imported, we can use that file as
part of the key used to cache declarations in a module. Because
multiple files can contribute to the __ObjC module, we've always given
it the phony filename "<imports>", which never exists, so `stat`-ing it
always fails and we never cache declarations in it.
This is extremely problematic for projects with huge bridging headers.
In the case where we have a single PCH import, this can bring warm code
completion times down to about 500ms from over 2-3s, so it can provide a
nice performance win for IDEs.
- Add a new test that performs two code-completion requests with a bridging header.
- Add some -pch-output-dir flags to existing SourceKit tests that import a bridging
header.
rdar://problem/31198982
Two problems:
1) We were tearing down the type checker too early, before all
relevant decls in other files had been type checked, so there
was no LazyResolver available for use in the ASTContext.
This might explain the crashes coming through
diagnoseUnintendedObjCMethodOverrides().
2) When a lazy resolver was set in the ASTContext, we were not
using it in the case where nullptr was passed in as the
'resolver' parameter to inheritsSuperclassInitializers().
This might fix the crashes where we were coming in from other
code paths, but I'm less confident about this case.
Possibly fixes <rdar://problem/29043074>, <rdar://problem/30976765>,
<rdar://problem/31122590>, and <rdar://problem/31286627>, and the
many other similar-looking dupes.
For instance:
protocol P1 {
func foo()
}
protocol P2 : P1 {
func bar()
}
extension P2 {
func foo() {}
}
We report the foo() in P2's extension as the default implementation of foo() declared in P1.
SourceKit always sets it positively. This may lead to more aggressive fixits however
less informative messages. We currently use the flag only for filling protocol stubs.
