Fake overrides are needed at least for static fields inherited from Java
interfaces. Not static methods though, because they are not inherited.
#KT-57302 Fixed
We can't reduce resolve to COMPILER_REQUIRED_ANNOTATIONS phase for
annotations with arguments, because currently they don't have
argument mapping
```stracktrace
org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments: By now the annotations argument mapping should have been resolved
at org.jetbrains.kotlin.analysis.api.fir.annotations.FirAnnotationUtilsKt.mapAnnotationParameters(firAnnotationUtils.kt:137)
at org.jetbrains.kotlin.analysis.api.fir.FirUtilsKt.toKtAnnotationApplication(FirUtils.kt:79)
at org.jetbrains.kotlin.analysis.api.fir.annotations.FirAnnotationUtilsKt.annotationsByClassId(firAnnotationUtils.kt:60)
at org.jetbrains.kotlin.analysis.api.fir.annotations.FirAnnotationUtilsKt.annotationsByClassId$default(firAnnotationUtils.kt:46)
```
^KT-57424 Fixed
- This optimization applied to LL FIR can be extended to K2 as a whole.
Likely, there won't be any performance benefits in CLI runs, but it's
still better to avoid useless symbol providers.
- Dependency symbol providers contained a lot of useless
`FirExtensionSyntheticFunctionInterfaceProvider`s, because such a
provider only generates function classes from compiler plugins. If
there aren't any such `FunctionTypeKind`s in the session, there is no
need to even add the provider.
- `FirExtensionSyntheticFunctionInterfaceProvider`s that are added to
the list of dependency providers despite this optimization will now be
combined in `LLFirCombinedSyntheticFunctionSymbolProvider`. It checks
`ClassId` heuristics once, which is more efficient than checking them
in every provider separately.
- Similar to the implementation of `isNameForFunctionClass` in
`FirSymbolProvider`, `FirSyntheticFunctionInterfaceProvider` benefits
from checking the `ClassId` for a digit before accessing its class
cache.
- Replace the "recurse one layer deep" approach of
`LLFirDependentModuleProviders` with a flattened list of dependency
symbol providers.
- This refactoring is a necessary component of supporting combined
symbol providers.
Basically, this commit reworks eraseToUpperBound* stuff
Instead of a bunch of vague flags, we introduce two modes
(rawTypes/intersection emptiness checker) which defined those flags.
Also, it makes choosing `eraseArgumentsDeeply` option always because
that how it works in K1 and also use invariant projection inside
`eraseArgumentsDeeply` for raw types for the same reason.
^KT-57198 Fixed
These tests won't be FIR_IDENTICAL after the next commit. That's why I
split them prematurely. This allows me to have a nicer diff in `2/2`
commit.
In scope of KT-15470
Review: https://jetbrains.team/p/kt/reviews/9250
Sergej Jaskiewicz