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the specialized impl
(cherry picked from commit 4b188d9d667dfcc7ba4caf95e56cbb3a6697f292)
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Crate loader cleanups
Minor cleanups I found while trying to understand how all of this works
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Revert "use `tcx.used_crates(())` more" before it reaches beta
There are more open issues caused by #124976 than will be fixed by #125493 alone. The beta cut is soon, so let's revert it and buy some time to analyze and fix these issues in our own time.
fixes https://github.com/rust-lang/rust/issues/125474
fixes https://github.com/rust-lang/rust/issues/125484
fixes https://github.com/rust-lang/rust/issues/125646
fixes https://github.com/rust-lang/rust/issues/125707
fixes #126066
fixes #125934
fixes https://github.com/rust-lang/rust/issues/126021
r? `@petrochenkov`
`@bors` p=1
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This reverts commit eda4a35f365535af72118118a3597edf5a13c12d, reversing
changes made to eb6b35b5bcb3c2a594cb29cd478aeb2893f49d30.
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Implement `needs_async_drop` in rustc and optimize async drop glue
This PR expands on #121801 and implements `Ty::needs_async_drop` which works almost exactly the same as `Ty::needs_drop`, which is needed for #123948.
Also made compiler's async drop code to look more like compiler's regular drop code, which enabled me to write an optimization where types which do not use `AsyncDrop` can simply forward async drop glue to `drop_in_place`. This made size of the async block from the [async_drop test](https://github.com/zetanumbers/rust/blob/67980dd6fb11917d23d01a19c2cf4cfc3978aac8/tests/ui/async-await/async-drop.rs) to decrease by 12%.
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Almost all callers want this anyway, and now we can use it to also return fed bodies
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We are gonna need it to uplift EarlyBinder
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Remove more `#[macro_use] extern crate tracing`
Because explicit importing of macros via use items is nicer (more standard and readable) than implicit importing via `#[macro_use]`. Continuing the work from #124511 and #124914.
r? `@jackh726`
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Rename `FrameworkOnlyWindows` to `RawDylibOnlyWindows`
Frameworks are Apple-specific, no idea why it had "framework" in the name before.
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rustc: Use `tcx.used_crates(())` more
And explain when it should be used.
Addresses comments from https://github.com/rust-lang/rust/pull/121167.
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Add a footer in FileEncoder and check for it in MemDecoder
We have a few reports of ICEs due to decoding failures, where the fault does not lie with the compiler. The goal of this PR is to add some very lightweight and on-by-default validation to the compiler's outputs. If validation fails, we emit a fatal error for rmeta files in general that mentions the path that didn't load, and for incremental compilation artifacts we emit a verbose warning that tries to explain the situation and treat the artifacts as outdated.
The validation currently implemented here is very crude, and yet I think we have 11 ICE reports currently open (you can find them by searching issues for `1002111927320821928687967599834759150`) which this simple validation would have detected. The structure of the code changes here should permit the addition of further validation code, such as a checksum, if it is merited. I would like to have code to detect corruption such as reported in https://github.com/rust-lang/rust/issues/124719, but I'm not yet sure how to do that efficiently, and this PR is already a good size.
The ICE reports I have in mind that this PR would have smoothed over are:
https://github.com/rust-lang/rust/issues/124469
https://github.com/rust-lang/rust/issues/123352
https://github.com/rust-lang/rust/issues/123376 [^1]
https://github.com/rust-lang/rust/issues/99763
https://github.com/rust-lang/rust/issues/93900.
---
[^1]: This one might be a compiler bug, but even if it is I think the workflow described is pushing the envelope of what we can support. This issue is one of the reasons this warning still asks people to file an issue.
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And explain when it should be used.
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Frameworks are Apple-specific, no idea why it had "framework" in the
name before.
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This ensures all diagnostic messages are created at diagnostic emission
time, making them translatable.
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And remove an unnecessary `feature(try_blocks)`.
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always print nice 'std not found' error when std is not found
Fixes https://github.com/rust-lang/miri/issues/3529
Arguably Miri is doing something odd by letting people create no-std sysroots for arbitrary targets -- but equally arguably, there's no good reason for rustc to special-case the host triple here. Being a non-host triple does not imply the target is a no-std target, after all.
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And suggest adding the `#[coroutine]` to the closure
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Enable `CrateNum` query feeding via `TyCtxt`
Instead of having a magic function that violates some `TyCtxtFeed` invariants, add a `create_def` equivalent for `CrateNum`s.
Note that this still isn't tracked by the query system (unlike `create_def`), and that feeding most `CrateNum` queries for crates other than the local one will likely cause performance regressions.
These things should be attempted on their own separately, but this PR should stand on its own
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weak lang items are not allowed to be #[track_caller]
For instance the panic handler will be called via this import
```rust
extern "Rust" {
#[lang = "panic_impl"]
fn panic_impl(pi: &PanicInfo<'_>) -> !;
}
```
A `#[track_caller]` would add an extra argument and thus make this the wrong signature.
The 2nd commit is a consistency rename; based on the docs [here](https://doc.rust-lang.org/unstable-book/language-features/lang-items.html) and [here](https://rustc-dev-guide.rust-lang.org/lang-items.html) I figured "lang item" is more widely used. (In the compiler output, "lang item" and "language item" seem to be pretty even.)
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This way it's like `Definitions`, which creates `DefId`s by interning `DefPathData`s, but for interning stable crate hashes
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It shouldn't be necessary for performance now.
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linker: Avoid some allocations in search directory iteration
This is more a cleanup than actual optimization.
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Replace some `CrateStore` trait methods with hooks.
Just like with the `CrateStore` trait, this avoids the cyclic definition issues with `CStore` being
defined after TyCtxt, but needing to be used in TyCtxt.
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This also avoids the cyclic definition issues with CrateStore being
defined after TyCtxt, but needing to be used in TyCtxt.
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Fixed the `private-dependency` bug
Fixed the private-dependency bug: If the directly dependent crate is loaded last and is not configured with `--extern`, it may be incorrectly set to `private-dependency`
Fixes #122756
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