adjust documented inline-asm register constraints
This change more clearly specifies how `reg` and `reg_thumb` work with ARM, Thumb2, and Thumb1 code.
Based upon the [llvm documentation](https://llvm.org/docs/LangRef.html#supported-constraint-code-list) for register constraint codes.
To be clear, this just updates the docs to match what already happens with rustc/llvm.
No change in the compiler is required to make it match this new documentation.
Only use `clone3` when needed for pidfd
In #89522 we learned that `clone3` is interacting poorly with Gentoo's
`sandbox` tool. We only need that for the unstable pidfd extensions, so
otherwise avoid that and use a normal `fork`.
This is a re-application of beta #89924, now that we're aware that we need
more than just a temporary release fix. I also reverted 12fbabd27f700, as
that was just fallout from using `clone3` instead of `fork`.
r? `@Mark-Simulacrum`
cc `@joshtriplett`
This commit tweaks the expansion of `thread_local!` when combined with a
`const { ... }` value to help ensure that the rules which apply to
`const { ... }` blocks will be the same as when they're stabilized.
Previously with this invocation:
thread_local!(static NAME: Type = const { init_expr });
this would generate (on supporting platforms):
#[thread_local]
static NAME: Type = init_expr;
instead the macro now expands to:
const INIT_EXPR: Type = init_expr;
#[thread_local]
static NAME: Type = INIT_EXPR;
with the hope that because `init_expr` is defined as a `const` item then
it's not accidentally allowing more behavior than if it were put into a
`static`. For example on the stabilization issue [this example][ex] now
gives the same error both ways.
[ex]: https://github.com/rust-lang/rust/issues/84223#issuecomment-953384298
Remove potential useless data for search index
I uncovered this case when working on https://github.com/rust-lang/rust/pull/90726 to debug https://github.com/rust-lang/rust/pull/90385.
Explanations: if we have a full generic, we check if it has generics then we do the following:
* If it has only one generic, we remove one nested level in order to not keep the "parent" generic (since it has empty name, it's useless after all).
* Otherwise we add it alongside its generics.
However, I didn't handle the case where a generic had no generics. Meaning that we were adding items with empty names in the search index. So basically useless data in the search index.
r? `@camelid`
Use computed visibility in rustdoc
This PR changes `librustdoc` to use computed visibility instead of syntactic visibility. It was initially part of #88019, but was separated due to concerns that it might cause a regression somewhere we couldn't predict.
r? `@jyn514`
cc `@cjgillot` `@petrochenkov`
* Add wasm64 variants for inline assembly along the same lines as wasm32
* Update a few directives in libtest to check for `target_family`
instead of `target_arch`
* Update some rustc codegen and typechecks specialized for wasm32 to
also work for wasm64.
This commit works around a crash in LLVM when the
`-generate-arange-section` argument is passed to LLVM. An LLVM bug is
opened for this and the code in question is also set to continue passing
this flag with LLVM 14, assuming that this is fixed by the time LLVM 14
comes out. Otherwise this should work around debuginfo crashes on LLVM
13.
This commit goes through and updates various `#[cfg]` as appropriate to
get the wasm64-unknown-unknown target behaving similarly to the
wasm32-unknown-unknown target. Most of this is just updating various
conditions for `target_arch = "wasm32"` to also account for `target_arch
= "wasm64"` where appropriate. This commit also lists `wasm64` as an
allow-listed architecture to not have the `restricted_std` feature
enabled, enabling experimentation with `-Z build-std` externally.
The main goal of this commit is to enable playing around with
`wasm64-unknown-unknown` externally via `-Z build-std` in a way that's
similar to the `wasm32-unknown-unknown` target. These targets are
effectively the same and only differ in their pointer size, but wasm64
is much newer and has much less ecosystem/library support so it'll still
take time to get wasm64 fully-fledged.
Update llvm submodule
This includes debug info generation fix, that fixes#90301.
Also includes WASM backend related fix for https://bugs.llvm.org/show_bug.cgi?id=52352
(I haven't found a corresponding Rust bug).
Because after PR 86041, the optimizer no longer load-merges at the LLVM IR level, which might be part of the perf loss. (I'll run perf and see if this makes a difference.)
Also I added a codegen test so this hopefully won't regress in future -- it passes on stable and with my change here, but not on the 2021-11-09 nightly.
Otherwise, rustdoc panics with messages like this:
thread 'rustc' panicked at 'assertion failed: cx.impl_trait_bounds.is_empty()',
src/librustdoc/clean/utils.rs:462:5
This ordering requirement is unrelated to the `clean_fn_decl_with_args`
refactoring, but the requirement was uncovered as part of that change.
I'm not sure if *all* of these places have the requirement, but I added
comments to them just in case.
Update books
## nomicon
1 commits in 358e6a61d5f4f0496d0a81e70cdcd25d05307342..c6b4bf831e9a40aec34f53067d20634839a6778b
2021-10-20 11:23:12 -0700 to 2021-11-09 02:30:56 +0900
- Replace some use of variant with covariant (rust-lang/nomicon#322)
## book
11 commits in fd9299792852c9a368cb236748781852f75cdac6..5c5dbc5b196c9564422b3193264f3288d2a051ce
2021-10-22 21:59:46 -0400 to 2021-11-09 19:30:43 -0500
- Fix constants link.
- Fix updated anchor
- Propagate edits to chapter 2 back
- Edits to nostarch's chapter 3 edits
- ch 3 from nostarch
- Fix Cargo.toml snippet about custom derive macros
- Snapshot of chapter 9 for nostarch
- Create tmp/src for converting quotes, not sure why this broke but ok
- Update question mark to better explain where it can be used
- Clarify sentence about Results in functions that don't return Result. Fixesrust-lang/book#2912.
- Merge pull request rust-lang/book#2913 from covariant/patch-1
## rust-by-example
2 commits in 27f1ff5e440ef78828b68ab882b98e1b10d9af32..e9d45342d7a6c1def4731f1782d87ea317ba30c3
2021-10-13 08:04:40 -0300 to 2021-11-02 13:33:03 -0500
- Enums: Linked-List Needs Re-Wording (rust-lang/rust-by-example#1469)
- fix: Use the point as top left corner for `square` (rust-lang/rust-by-example#1471)
## rustc-dev-guide
13 commits in b06008731af0f7d07cd0614e820c8276dfed1c18..196ef69aa68f2cef44f37566ee7db37daf00301b
2021-10-21 15:13:09 -0500 to 2021-11-07 07:48:47 -0600
- Fix typo: [upv.rs_mentioned] -> [upvars_mentioned]
- Add note to emphasize replacing TARGET_TRIPLE (rust-lang/rustc-dev-guide#1250)
- Remove some legacy test suites.
- tiny capitalization fix
- Fix date
- Update some date-check comments
- Ensure date-check cron job is using latest stable Rust
- enhance subtree docs, link to clippy docs
- Edit introduction to bootstrapping
- Some minor adjustments to the diagnostic documentation
- Edit "About this guide" for semantic line feeds
- Fix `rustc_mir` related links (rust-lang/rustc-dev-guide#1228)
- Add documentation for LLVM CFI support
## edition-guide
3 commits in 7c0088ca744d293a5f4b1e2ac378e7c23d30fe55..27f4a84d3852e9416cae5861254fa53a825c56bd
2021-10-05 13:28:05 +0200 to 2021-11-08 10:13:20 -0500
- Add a missing period (rust-lang/edition-guide#271)
- Fix syntax error in code example (rust-lang/edition-guide#270)
- Fixed an example error of prelude.md (rust-lang/edition-guide#269)
Basically, this entails moving the arguments cleaning to the call site.
I extracted several local variables because:
1. It makes the code easier to read and understand.
2. If I hadn't, the extra `clean()` calls would have caused complicated
tuples to be split across several lines.
3. I couldn't just extract local variables for `args` because then the
arguments would be cleaned *before* the generics, while rustdoc expects
them to be cleaned *after*. Only extracting `args` caused panics like
this:
thread 'rustc' panicked at 'assertion failed: cx.impl_trait_bounds.is_empty()',
src/librustdoc/clean/utils.rs:462:5
Extracting variables makes the control flow -- and the required
order of cleaning -- more explicit.
Support early stopping too old pre-installed `tidy` command for macOS in the HTML checker
This PR brings early stopping the HTML checker before errors, which leave some macOS users confused, and suggesting installing a newer `tidy` command.
The pre-installed `tidy` command on macOS is too old, released on 31 October 2006. Additionally, I can see the same date at [StackOverflow](https://stackoverflow.com/questions/22283382/overwrite-osx-tidy
) seven years ago. The `tidy` does not support two indispensable options: `--mute-id` and `--mute`. So, the `./x.py test` command fails with a bunch of errors due not to muting them.
I could confirm the `./x.py test` command before installing a newer `tidy` failed and its command after the installation succeeded.
