Make `rustc_type_ir` build on stable
This PR fixes a handful of issues that appear in `rustc_type_ir` when trying to build the new solver on stable.
r? ```@compiler-errors```
```@bors``` rollup
handle stage0 `cargo` and `rustc` separately
This change allows setting either `build.cargo` or `build.rustc` without requiring both to be set simultaneously, which was not possible previously.
To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.
Blocker for https://github.com/rust-lang/rust/pull/129152
library: Move unstable API of new_uninit to new features
- `new_zeroed` variants move to `new_zeroed_alloc`
- the `write` fn moves to `box_uninit_write`
The remainder will be stabilized in upcoming patches, as it was decided to only stabilize `uninit*` and `assume_init`.
Build `library/profiler_builtins` from `ci-llvm` if appropriate
Running all of `tests/coverage` requires the LLVM profiler runtime, which requires setting `build.profiler = true`.
Historically, doing that has required checking out the entire `src/llvm-project` submodule. For compiler contributors who otherwise don't need that submodule (thanks to `download-ci-vm`), that's quite inconvenient.
However, thanks to #129116, the downloaded CI LLVM tarball now contains a copy of LLVM's `compiler-rt` directory, which includes all the files needed to build the profiler runtime. So with a little bit of extra logic in bootstrap, we can have `library/profiler_builtins` look for the `compiler-rt` files in `ci-llvm` instead of the `src/llvm-project` submodule.
fix: add extra_test_bin_args to test explorer test runner
`@HKalbasi` I thought I included this in #17470 but it appears not so I have created a new issue #17959 for this fix.
Rollup of 10 pull requests
Successful merges:
- #128467 (Detect `*` operator on `!Sized` expression)
- #128524 (Don't suggest turning crate-level attributes into outer style)
- #128735 (Add a special case for `CStr`/`CString` in the `improper_ctypes` lint)
- #129429 (Print the generic parameter along with the variance in dumps.)
- #129430 (rustdoc: show exact case-sensitive matches first)
- #129449 (Put Pin::as_deref_mut in impl Pin<Ptr> / rearrange Pin methods)
- #129481 (Update `compiler_builtins` to `0.1.121`)
- #129482 (Add myself to the review rotation for libs)
- #129492 (Make wasm32 platform support docs easier to read)
- #129512 (update the doc comment on lintchecker b/c it parses html now)
r? `@ghost`
`@rustbot` modify labels: rollup
fix: Don't enable the search fast path for short associated functions when a search scope is set
In most places where we set a search scope it is a single file, and so the fast path will actually harm performance, since it has to search for aliases in the whole project. The only exception that qualifies for the fast path is SSR (there is an exception that don't qualify for the fast path as it search for `use` items). It sets the search scope to avoid dependencies. We could make it use the fast path, but I didn't bother.
I forgot this while working on #17927.
