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Add `#[rustc_no_mir_inline]` for standard library UB checks
should help with #121110 and also with #120848
Because the MIR inliner cannot know whether the checks are enabled or not, so inlining is an unnecessary compile time pessimization when debug assertions are disabled. LLVM knows whether they are enabled or not, so it can optimize accordingly without wasting time.
r? `@saethlin`
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Co-authored-by: Ben Kimock <kimockb@gmail.com>
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mark `min_exhaustive_patterns` as complete
This is step 1 and 2 of my [proposal](https://github.com/rust-lang/rust/issues/119612#issuecomment-1918097361) to move `min_exhaustive_patterns` forward. The vast majority of in-tree use cases of `exhaustive_patterns` are covered by `min_exhaustive_patterns`. There are a few cases that still require `exhaustive_patterns` in tests and they're all behind references.
r? ``@ghost``
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the crate metadate.
Thank you.
This is part of changing attributes to only_local. I hope get your opinion whether I should split into multiple PRs, or submit in one.
According to [try to not rely on attributes from extern crates](https://github.com/rust-lang/compiler-team/issues/505) and lcnr's guidance.
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weiznich:move/do_not_recommend_to_diganostic_namespace, r=compiler-errors
Move `#[do_not_recommend]` to the `#[diagnostic]` namespace
This commit moves the `#[do_not_recommend]` attribute to the `#[diagnostic]` namespace. It still requires
`#![feature(do_not_recommend)]` to work.
r? `@compiler-errors`
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This commit moves the `#[do_not_recommend]` attribute to the
`#[diagnostic]` namespace. It still requires
`#![feature(do_not_recommend)]` to work.
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r=pnkfelix
Add an experimental feature gate for global registration
See #125119 for the tracking issue.
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This commit adds a new nonterminal `expr_2021` in macro patterns, and
`expr_fragment_specifier_2024` feature flag. For now, `expr` and
`expr_2021` are treated the same, but in future PRs we will update
`expr` to match to new grammar.
Co-authored-by: Vincezo Palazzo <vincenzopalazzodev@gmail.com>
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Implement intrinsics with fallback bodies
fixes #93145 (though we can port many more intrinsics)
cc #63585
The way this works is that the backend logic for generating custom code for intrinsics has been made fallible. The only failure path is "this intrinsic is unknown". The `Instance` (that was `InstanceDef::Intrinsic`) then gets converted to `InstanceDef::Item`, which represents the fallback body. A regular function call to that body is then codegenned. This is currently implemented for
* codegen_ssa (so llvm and gcc)
* codegen_cranelift
other backends will need to adjust, but they can just keep doing what they were doing if they prefer (though adding new intrinsics to the compiler will then require them to implement them, instead of getting the fallback body).
cc `@scottmcm` `@WaffleLapkin`
### todo
* [ ] miri support
* [x] default intrinsic name to name of function instead of requiring it to be specified in attribute
* [x] make sure that the bodies are always available (must be collected for metadata)
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Add lahfsahf and prfchw target feature
This adds target features for LAHF/SAHF and PrefetchW. These came up. along with the existing CMPXCHG16b. as [baseline features](https://download.microsoft.com/download/c/1/5/c150e1ca-4a55-4a7e-94c5-bfc8c2e785c5/Windows%2010%20Minimum%20Hardware%20Requirements.pdf) required for x86_64 Windows 10+.
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Now that we have both `delayed_bug` and `span_delayed_bug`, it makes
sense to use the generic term "delayed bug" more.
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Bump bootstrap compiler to just-built 1.77 beta
https://forge.rust-lang.org/release/process.html#master-bootstrap-update-t-2-day-tuesday
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Invert diagnostic lints.
That is, change `diagnostic_outside_of_impl` and `untranslatable_diagnostic` from `allow` to `deny`, because more than half of the compiler has been converted to use translated diagnostics.
This commit removes more `deny` attributes than it adds `allow` attributes, which proves that this change is warranted.
r? ````@davidtwco````
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Remove `ffi_returns_twice` feature
The [tracking issue](https://github.com/rust-lang/rust/issues/58314) and [RFC](https://github.com/rust-lang/rfcs/pull/2633) have been closed for a couple of years.
There is also an attribute gate in R-A which should be removed if this lands.
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That is, change `diagnostic_outside_of_impl` and
`untranslatable_diagnostic` from `allow` to `deny`, because more than
half of the compiler has be converted to use translated diagnostics.
This commit removes more `deny` attributes than it adds `allow`
attributes, which proves that this change is warranted.
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This reverts commit 6d2b84b3ed7848fd91b8d6151d4451b3103ed816, reversing
changes made to 73bc12199ea8c7651ed98b069c0dd6b0bb5fabcf.
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Convert `effects` description to doc comment
So that it is visible here: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_feature/unstable/struct.Features.html#structfield.effects
r? `@fee1-dead`
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`c_str_literals`'s stabilization has been delayed to 1.77 (https://github.com/rust-lang/rust/pull/119528).
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So that it is visible here: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_feature/unstable/struct.Features.html#structfield.effects
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Make `negative_bounds` internal & fix some of its issues
r? compiler-errors
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The original tracking issue was superseded by a new one
(constrainted naked functions) and therefore is closed.
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r=Nilstrieb
Add missing feature gate for sanitizer CFI cfgs
Found during the review of https://github.com/rust-lang/rust/pull/118494 in https://github.com/rust-lang/rust/pull/118494#discussion_r1416079288.
cc `@rcvalle`
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Bump stage0 to 1.76 beta
r? `@Mark-Simulacrum`
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