Remove pre-expansion AST stats.
They're very little value, because they only measure the top-level `main.rs` or `lib.rs` file. (Other `.rs` files don't get read and parsed until expansion occurs.)
I saw an example recently where the pre-expansion AST was 3KB in size and the post-expansion AST was 66MB.
I kept the "POST EXPANSION" in the output header, I think that's useful information to avoid possible confusion about when the measurement happens.
r? `@davidtwco`
Remove bootstrap cfgs from library/
These `cfg(bootstrap)` are always false now that rust-lang/rust#119899 has landed, and likewise `cfg(not(bootstrap))` is always true. Therefore, we don't need to wait for the usual stage0 bump to clean these up.
Use the informative error as the main const eval error message
r? `@RalfJung`
I only did the minimal changes necessary to the const eval error machinery. I'd prefer not to mix test changes with refactorings 😆
Replace ad-hoc ABI "adjustments" with an `AbiMap` to `CanonAbi`
Our `conv_from_spec_abi`, `adjust_abi`, and `is_abi_supported` combine to give us a very confusing way of reasoning about what _actual_ calling convention we want to lower our code to and whether we want to compile the resulting code at all. Instead of leaving this code as a miniature adventure game in which someone tries to combine stateful mutations into a Rube Goldberg machine that will let them escape the maze and arrive at the promised land of codegen, we let `AbiMap` devour this complexity. Once you have an `AbiMap`, you can answer which `ExternAbi`s will lower to what `CanonAbi`s (and whether they will lower at all).
Removed:
- `conv_from_spec_abi` replaced by `AbiMap::canonize_abi`
- `adjust_abi` replaced by same
- `Conv::PreserveAll` as unused
- `Conv::Cold` as unused
- `enum Conv` replaced by `enum CanonAbi`
target-spec.json changes:
- If you have a target-spec.json then now your "entry-abi" key will be specified in terms of one of the `"{abi}"` strings Rust recognizes, e.g.
```json
"entry-abi": "C",
"entry-abi": "win64",
"entry-abi": "aapcs",
```
std: abort the process on failure to allocate a TLS key
The panic machinery uses TLS, so panicking if no TLS keys are left can lead to infinite recursion (see https://github.com/rust-lang/rust/issues/140798#issuecomment-2872307377). Rather than having separate logic for the panic count and the thread name, just always abort the process if a TLS key allocation fails. This also has the benefit of aligning the key-based TLS implementation with the documentation, which does not mention that a panic could also occur because of resource exhaustion.
This adds an `iter!` macro that can be used to create movable
generators.
This also adds a yield_expr feature so the `yield` keyword can be used
within iter! macro bodies. This was needed because several unstable
features each need `yield` expressions, so this allows us to stabilize
them separately from any individual feature.
Co-authored-by: Oli Scherer <github35764891676564198441@oli-obk.de>
Co-authored-by: Jieyou Xu <jieyouxu@outlook.com>
Co-authored-by: Travis Cross <tc@traviscross.com>
Use ccache for stage0 tool builds
Now after the stage0 redesign, we can actually start ccaching the build of the compiler itself. We can also cache the bootstrap tools, since these are also built with the stage0 compiler.
Stage0 compiler builds are now being cached: https://github.com/rust-lang/rust/actions/runs/15397246267#summary-43321151192 (`..bootstrap::core::build_steps::compile::Rustc 483.10s 40.41s -91.6%`). It's not a gigantic win everywhere, but it should help. It seems to make the Linux jobs ~10 minute faster. It should be especially useful on PR builds after https://github.com/rust-lang/rust/pull/141948.
r? `@jieyouxu`
try-job: `x86_64-gnu-llvm-19*`
try-job: `x86_64-msvc*`
try-job: `x86_64-apple*`
try-job: `dist-x86_64-linux`
Deconstruct values in the THIR visitor
I continue to add deconstruction for task rust-lang/rust#141849
The changes concern a more complex part of the task `compiler/rustc_hir/src/intravisit.rs`
r? `@nnethercote`
Update books
## rust-lang/book
4 commits in 230c68bc1e08f5f3228384a28cc228c81dfbd10d..634724ea85ebb08a542970bf8871ac8b0f77fd15
2025-05-29 13:16:14 UTC to 2025-05-22 21:35:03 UTC
- Chapter 10 from tech review (rust-lang/book#4379)
- Chapter 9 from tech review (rust-lang/book#4377)
- Chapter 8 from tech review (rust-lang/book#4378)
- Chapter 7 from tech review (rust-lang/book#4374)
## rust-embedded/book
3 commits in 0b8219ac23a3e09464e4e0166c768cf1c4bba0d5..10fa1e084365f23f24ad0000df541923385b73b6
2025-05-27 18:37:30 UTC to 2025-05-27 18:26:36 UTC
- portability: add reference to embedded-hal docs (rust-embedded/book#391)
- remove the unused and deprecated `multilingual` field from `book.toml` (rust-embedded/book#388)
- Ci upgrade 20250522 (rust-embedded/book#393)
## rust-lang/nomicon
4 commits in c76a20f0d987145dcedf05c5c073ce8d91f2e82a..8b61acfaea822e9ac926190bc8f15791c33336e8
2025-05-26 10:16:09 UTC to 2025-05-23 15:03:00 UTC
- Use inline const expression in unchecked-uninit.md (rust-lang/nomicon#492)
- Fix code sample output in unchecked-uninit.md (rust-lang/nomicon#491)
- Use consistent type parameters in subtyping.md (rust-lang/nomicon#493)
- Fix typo in atomics.md (rust-lang/nomicon#494)
## rust-lang/reference
1 commits in 118fd1f1f0854f50e3ae1fe4b64862aad23009ca..8e0f593a30f3b56ddb0908fb7ab9249974e08738
2025-05-31 20:12:39 UTC to 2025-05-31 20:12:39 UTC
- Minor fixes to `$crate` behavior (rust-lang/reference#1816)
## rust-lang/rust-by-example
4 commits in c9d151f9147c4808c77f0375ba3fa5d54443cb9e..21f4e32b8b40d36453fae16ec07ad4b857c445b6
2025-05-29 12:45:08 UTC to 2025-05-29 12:44:23 UTC
- Update book.toml rename `author` field to `authors` (rust-lang/rust-by-example#1917)
- Add example to comment.md to teach how to toggle a whole code block using block comments (rust-lang/rust-by-example#1919)
- The example is not meant to be compiled with out passing arguments. (rust-lang/rust-by-example#1930)
- added a shorthand for the #[should_panic(expected = "msg") (rust-lang/rust-by-example#1931)
Deconstruct values in the THIR visitor
Hi! I am a beginner rust developer.
I'm trying to solve your problem rust-lang/rust#141849
I see that 2 files need to be corrected, so I’m starting with a simpler step, `compiler/rustc_middle/src/thir/visit.rs`
r? `@krikera`
Switch `x86_64-msvc-{1,2}` back to Windows Server 2025 images
New Windows Server 2025 images have been released (**20250527.1.0**). New images appear to not exhibit the lack-of-disk-space problem as tracked by rust-lang/rust#141022, and the new runner image's storage capacity appears to be configured correctly.
Windows Server 2025 image version **20250527.1.0** release notes: <https://github.com/actions/runner-images/releases/tag/win25%2F20250527.1>.
Resolvesrust-lang/rust#141022.
`tests/ui`: A New Order [2/N]
part of rust-lang/rust#133895
r? `@jieyouxu`
let's try this kind of commits, one for each file, commit's name shows what i did, hope this is not harder to review than previous
fix(#141141): When expanding `PartialEq`, check equality of scalar types first.
Fixesrust-lang/rust#141141.
Now, `cs_eq` function of `partial_eq.rs` compares [scalar types](https://doc.rust-lang.org/rust-by-example/primitives.html#scalar-types) first.
- Add `is_scalar` field to `FieldInfo`.
- Add `is_scalar` method to `TyKind`.
- Pass `FieldInfo` via `CsFold::Combine` and refactor code relying on it.
- Implement `TryFrom<&str>` and `TryFrom<Symbol>` for FloatTy.
- Implement `TryFrom<&str>` and `TryFrom<Symbol>` for IntTy.
- Implement `TryFrom<&str>` and `TryFrom<Symbol>` for UintTy.
Rollup of 9 pull requests
Successful merges:
- rust-lang/rust#141554 (Improve documentation for codegen options)
- rust-lang/rust#141817 (rustc_llvm: add Windows system libs only when cross-compiling from Wi…)
- rust-lang/rust#141843 (Add `visit_id` to ast `Visitor`)
- rust-lang/rust#141881 (Subtree update of `rust-analyzer`)
- rust-lang/rust#141898 ([rustdoc-json] Implement PartialOrd and Ord for rustdoc_types::Id)
- rust-lang/rust#141921 (Disable f64 minimum/maximum tests for arm 32)
- rust-lang/rust#141930 (Enable triagebot `[concern]` functionality)
- rust-lang/rust#141936 (Decouple "reporting in deps" from `FutureIncompatibilityReason`)
- rust-lang/rust#141949 (move `test-float-parse` tool into `src/tools` dir)
r? `@ghost`
`@rustbot` modify labels: rollup
Decouple "reporting in deps" from `FutureIncompatibilityReason`
The reason should just be it -- the reason. It never felt right to me that it was also responsible for whatever we include the warning in cargo's reports.
It gets especially unruly if you want to add non-`FutureReleaseError*` warnings which are included in the reports.
I just added a field to `FutureIncompatibleInfo` to control whatever the diagnostic is included in the cargo's reports.
Disable f64 minimum/maximum tests for arm 32
This disables the f64 minimum/maximum tests for the arm-unknown-linux-gnueabihf job. The next release will be supporting cross-compiled doctests, and these tests fail on that platform.
It looks like this was just fixed via https://github.com/llvm/llvm-project/pull/142170, but I assume that will not trickle down to our copy of llvm in the next couple of weeks. Assuming that does get fixed when llvm is updated, then these can be removed.
cc https://github.com/rust-lang/rust/issues/141087
[rustdoc-json] Implement PartialOrd and Ord for rustdoc_types::Id
This allows consumers to create collections that required an ordering relationship for their keys—e.g. a `BTreeMap`.
Add `visit_id` to ast `Visitor`
This helps with efforts to deduplicate the `MutVisitor` and the `Visitor` code. All users of `Visitor`'s methods that have extra `NodeId` as parameters really just want to visit the id on its own.
Also includes some methods deduplicated and cleaned up as a result of this change.
r? oli-obk
Improve documentation for codegen options
This adds more information to many different codegen options. It should not add any new guarantees, just document existing behavior.
r? bjorn3
Fix borrowck mentioning a name from an external macro we (deliberately) don't save
Most of the info is already in the title 🤷Closesrust-lang/rust#141764
