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compiler: apply clippy::clone_on_ref_ptr for CI
Apply lint https://rust-lang.github.io/rust-clippy/master/index.html#/clone_on_ref_ptr for compiler, also see https://github.com/rust-lang/rust/pull/131225#discussion_r1790109443.
Some Arc's can be misplaced with Lrc's, sorry.
https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/enable.20more.20clippy.20lints.20for.20compiler.20.28and.5Cor.20std.29
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Depend on rustc_abi in compiler crates that use it indirectly but have
not yet taken on that dependency, and are not entangled in my other PRs.
This leaves an "excise rustc_target" step after the dust settles.
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Co-authored-by: Jubilee <workingjubilee@gmail.com>
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remove a couple of redundant String to String conversion
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ismailarilik:handle-potential-query-instability-lint-for-clippy, r=xFrednet
Handle `clippy` cases of `rustc::potential_query_instability` lint
This PR removes `#![allow(rustc::potential_query_instability)]` line from [`src/tools/clippy/clippy_lints/src/lib.rs`](https://github.com/rust-lang/rust/blob/master/src/tools/clippy/clippy_lints/src/lib.rs#L30) and converts `FxHash{Map,Set}` types into `FxIndex{Map,Set}` to suppress lint errors.
A somewhat tracking issue: https://github.com/rust-lang/rust/issues/84447
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Implement RFC3695 Allow boolean literals as cfg predicates
This PR implements https://github.com/rust-lang/rfcs/pull/3695: allow boolean literals as cfg predicates, i.e. `cfg(true)` and `cfg(false)`.
r? `@nnethercote` *(or anyone with parser knowledge)*
cc `@clubby789`
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Add unstable support for outputting file checksums for use in cargo
Adds an unstable option that appends file checksums and expected lengths to the end of the dep-info file such that `cargo` can read and use these values as an alternative to file mtimes.
This PR powers the changes made in this cargo PR https://github.com/rust-lang/cargo/pull/14137
Here's the tracking issue for the cargo feature https://github.com/rust-lang/cargo/issues/14136.
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MCP: https://github.com/rust-lang/compiler-team/issues/782
Co-authored-by: bjorn3 <17426603+bjorn3@users.noreply.github.com>
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Stabilize `option_get_or_insert_default`
Closes: https://github.com/rust-lang/rust/issues/82901.
`@rustbot` label: +T-libs-api
r? libs-api
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Fix #128930: Print documentation of CLI options missing their arg
Fix #128930. Failing to give an argument to CLI options which require it now prints something like:
```
$ rustc --print
error: Argument to option 'print' missing
Usage:
--print [crate-name|file-names|sysroot|target-libdir|cfg|check-cfg|calling-conventions|target-list|target-cpus|target-features|relocation-models|code-models|tls-models|target-spec-json|all-target-specs-json|native-static-libs|stack-protector-strategies|link-args|deployment-target]
Compiler information to print on stdout
```
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deprecate -Csoft-float because it is unsound (and not fixable)
See https://github.com/rust-lang/rust/issues/129893 for details. The general sentiment there seems to be that this flag has no use and sound alternatives exist, so let's add this warning and see if anyone out there disagrees.
Also show a different warning on targets where it does nothing (as documented since https://github.com/rust-lang/rust/pull/36261): it seems to correspond to `-mfloat-abi` in GCC/clang, which is an ARM-specific option. To be really sure it does nothing, only forward the flag to LLVM for eabihf targets. This should not change behavior but makes me sleep better ;)
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Revert "Stabilize `-Znext-solver=coherence`"
This is a clean revert of #121848, prepared by running:
```
$ git revert 17b322fa69eed7216dccc9f097eb68237cf62234 -m1
```
Which effectively reverts:
* a138a9261536ac2bdbb7c01a8aa9dc7d43299cae, 69fdd1457d367ce4de044e9784e58a38acf3d847, d93e047c9f1b33892a604273ab3931815f5604a1, 1a893ac648e03732aaa8b5371b602ab683970b0d
see: https://rust-lang.zulipchat.com/#narrow/stream/364551-t-types.2Ftrait-system-refactor/topic/nalgebra.20hang
Closes #130056
r? lcnr
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Add -Z small-data-threshold
This flag allows specifying the threshold size above which LLVM should not consider placing small objects in a `.sdata` or `.sbss` section.
Support is indicated in the target options via the
small-data-threshold-support target option, which can indicate either an
LLVM argument or an LLVM module flag. To avoid duplicate specifications
in a large number of targets, the default value for support is
DefaultForArch, which is translated to a concrete value according to the
target's architecture.
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Remove needless returns detected by clippy in the compiler
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This flag allows specifying the threshold size above which LLVM should
not consider placing small objects in a .sdata or .sbss section.
Support is indicated in the target options via the
small-data-threshold-support target option, which can indicate either an
LLVM argument or an LLVM module flag. To avoid duplicate specifications
in a large number of targets, the default value for support is
DefaultForArch, which is translated to a concrete value according to the
target's architecture.
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nothing
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Add `unreachable_pub`, round 4
A follow-up to #129732.
r? `@Urgau`
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We want to allow setting this on the CLI, override it only in MIR
passes, and disable it altogether in mir-opt tests.
The default value is "only for NLL MIR dumps", which is considered off
for all intents and purposes, except for `rustc_borrowck` when an NLL
MIR dump is requested.
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Add `-Zlint-llvm-ir`
This flag is similar to `-Zverify-llvm-ir` and allows us to lint the generated IR.
r? compiler
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Allows disabling `fmt::Debug` derive and debug formatting.
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Rustc driver cleanup
This adds a few comments to the driver to clarify a bit what's happening and does some cleanup.
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rustc: Simplify getting sysroot library directory
It was very non-obvious that `sess.target_tlib_path`, `make_target_lib_path(...)`, and `sess.target_filesearch(...).search_paths()` result in the same sysroot library directory paths.
They are however, indeed the same, because `sess.target_tlib_path` is initialized to `make_target_lib_path(...)` on `Session` creation, and they are used interchangeably.
There are still some redundant calls to `make_target_lib_path` and other inconsistent ways to obtain sysroot directories, but fixing that requires some behavior changes, while this PR is a pure refactoring.
Some places in the compiler even disagree on the number of sysroots - 1 (explicit `--sysroot` *or* default sysroot), 2 (explicit `--sysroot` *and* default sysroot), or an unclear number of `sysroot_candidates` every of which is considered.
The logic currently using `sess.target_tlib_path` or equivalents assumes one sysroot.
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Implement `-Z embed-source` (DWARFv5 source code embedding extension)
Implement https://github.com/rust-lang/compiler-team/issues/764 MCP which adds an unstable flag that exposes LLVM's [DWARFv5 source code embedding](https://dwarfstd.org/issues/180201.1.html) support.
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