Rollup of 6 pull requests #134296
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Rollup of 6 pull requests #134296
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Co-authored-by: Ben Kimock <kimockb@gmail.com>
Lexing precedes parsing, as you'd expect: `Lexer` creates a
`TokenStream` and `Parser` then parses that `TokenStream`.
But, in a horrendous violation of layering abstractions and common
sense, `Lexer` depends on `Parser`! The `Lexer::unclosed_delim_err`
method does some error recovery that relies on creating a `Parser` to do
some post-processing of the `TokenStream` that the `Lexer` just created.
This commit just removes `unclosed_delim_err`. This change removes
`Lexer`'s dependency on `Parser`, and also means that `lex_token_tree`'s
return value can have a more typical form.
The cost is slightly worse error messages in two obscure cases, as shown
in these tests:
- tests/ui/parser/brace-in-let-chain.rs: there is slightly less
explanation in this case involving an extra `{`.
- tests/ui/parser/diff-markers/unclosed-delims{,-in-macro}.rs: the diff
marker detection is no longer supported (because that detection is
implemented in the parser).
In my opinion this cost is outweighed by the magnitude of the code
cleanup.
Fix powerpc64 big-endian FreeBSD ABI Note that FreeBSD version bump may be reverted due to rust-lang#120869 (comment). We may want to wait to merge this until that discussion is complete. Fixes rust-lang#120869 (comment) > > PPC64 FreeBSD (ELFv1 and ELFv2, version 13.2) > > It seems odd that ELFv1 and 13.N coexist. > > https://www.freebsd.org/releases/13.0R/relnotes/ > > > powerpc64 switched to ELFv2 ABI at the same time it switched to LLVM. This brings us to a parity with modern Linux distributions. This also makes the binaries from previous FreeBSD versions incompatible with 13.0-RELEASE. Kernel still supports ELFv1, so jails and chroots using older FreeBSD versions are still compatible. [e4399d169acc](https://cgit.freebsd.org/src/commit/?id=e4399d169acc) > > Well, it is also odd that this target claims ELFv2 support since our ABI code does not use ELFv2 on this target. > > https://github.com/rust-lang/rust/blob/be01dabfefd2daa4574b974f571c7852085d60cb/compiler/rustc_target/src/callconv/powerpc64.rs#L102-L111 ````````@rustbot```````` label +O-PowerPC +O-freebsd
Clarify how to use `black_box()` Closes rust-lang#133923. r? libs ^ (I think that's the right group, this is my first time!) This PR adds further clarification on the [`black_box()`](https://doc.rust-lang.org/stable/std/hint/fn.black_box.html) documentation. Specifically, it teaches _how_ to use it, instead of just _when_ to use it. I tried my best to make it clear and accurate, but a lot of my information is sourced from rust-lang/rust-clippy#12707 and [manually inspecting assembly](https://godbolt.org/). Please tell me if I got anything wrong!
Try to evaluate constants in legacy mangling Best reviewed commit by commit. It seems kind of odd to treat literals differently from unevaluated free constants. So let's evaluate those constants and only fall back to `_` rendering if that fails to result in an integral constant
…=compiler-errors
Remove `Lexer`'s dependency on `Parser`.
Lexing precedes parsing, as you'd expect: `Lexer` creates a `TokenStream` and `Parser` then parses that `TokenStream`.
But, in a horrendous violation of layering abstractions and common sense, `Lexer` depends on `Parser`! The `Lexer::unclosed_delim_err` method does some error recovery that relies on creating a `Parser` to do some post-processing of the `TokenStream` that the `Lexer` just created.
This commit just removes `unclosed_delim_err`. This change removes `Lexer`'s dependency on `Parser`, and also means that `lex_token_tree`'s return value can have a more typical form.
The cost is slightly worse error messages in two obscure cases, as shown in these tests:
- tests/ui/parser/brace-in-let-chain.rs: there is slightly less explanation in this case involving an extra `{`.
- tests/ui/parser/diff-markers/unclosed-delims{,-in-macro}.rs: the diff marker detection is no longer supported (because that detection is implemented in the parser).
In my opinion this cost is outweighed by the magnitude of the code cleanup.
r? ```````@chenyukang```````
…-errors coverage: Tidy up creation of covmap and covfun records This is a small follow-up to rust-lang#134163 that mostly just inlines and renames some variables, and adds a few comments. It also slightly defers the creation of the LLVM value that holds the filename table, to just before the value is needed. --- try-job: x86_64-mingw-2 try-job: dist-x86_64-linux
…er-errors On Neutrino QNX, reduce the need to set archiver via environment variables This adds support for automatically selecting the correct `ar` tool when compiling for Neutrino QNX. Once rust-lang/cc-rs#1319 is merged and a new cc version is integrated, all environment variables of the [Neutrino documentation](https://github.com/rust-lang/rust/blob/stable/src/doc/rustc/src/platform-support/nto-qnx.md) can be removed. CC: ````````@jonathanpallant```````` ````````@japaric```````` ````````@gh-tr```````` ````````@AkhilTThomas````````
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@bors r+ rollup=never p=6 |
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Dec 14, 2024
…iaskrgr Rollup of 6 pull requests Successful merges: - rust-lang#132150 (Fix powerpc64 big-endian FreeBSD ABI) - rust-lang#133942 (Clarify how to use `black_box()`) - rust-lang#134081 (Try to evaluate constants in legacy mangling) - rust-lang#134192 (Remove `Lexer`'s dependency on `Parser`.) - rust-lang#134208 (coverage: Tidy up creation of covmap and covfun records) - rust-lang#134211 (On Neutrino QNX, reduce the need to set archiver via environment variables) r? `@ghost` `@rustbot` modify labels: rollup
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The job Click to see the possible cause of the failure (guessed by this bot) |
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💔 Test failed - checks-actions |
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@bors retry |
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☀️ Test successful - checks-actions |
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📌 Perf builds for each rolled up PR:
previous master: f5079d00e6 In the case of a perf regression, run the following command for each PR you suspect might be the cause: |
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Finished benchmarking commit (f1ec5d6): comparison URL. Overall result: ❌ regressions - please read the text belowOur benchmarks found a performance regression caused by this PR. Next Steps:
@rustbot label: +perf-regression Instruction countThis is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.
Max RSS (memory usage)Results (secondary -2.4%)This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.
CyclesResults (secondary -2.4%)This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.
Binary sizeThis benchmark run did not return any relevant results for this metric. Bootstrap: 769.535s -> 770.831s (0.17%) |
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The small regression was caused by #134081, but it was not deemed worthy to get rid of them. @rustbot label: +perf-regression-triaged |
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Successful merges:
black_box()#133942 (Clarify how to useblack_box())Lexer's dependency onParser. #134192 (RemoveLexer's dependency onParser.)r? @ghost
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