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Issues: rust-lang/rust

Draft release notes for 1.88.0
#141598 opened May 26, 2025 by Mark-Simulacrum
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Issues list

[beta] backports A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion.
#141745 opened May 29, 2025 by cuviper Loading…
@cuviper
3
LLVM optimization often (always?) results of loss of closure upvar debug info A-debuginfo Area: Debugging information in compiled programs (DWARF, PDB, etc.) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. WG-llvm Working group: LLVM backend code generation
#141712 opened May 29, 2025 by khuey
Atomic intrinsics : use const generic ordering, part 2 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. S-blocked Status: Blocked on something else such as an RFC or other implementation work. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#141700 opened May 28, 2025 by RalfJung Loading…
@bjorn3
5
Pure batching without autodiff A-attributes Area: Attributes (`#[…]`, `#![…]`) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. F-autodiff `#![feature(autodiff)]` F-batching `#![feature(batching)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141637 opened May 27, 2025 by ZuseZ4 • Draft
2
Replace ad-hoc ABI "adjustments" with an AbiMap to CanonAbi A-ABI Area: Concerning the application binary interface (ABI) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-target-specs Area: Compile-target specifications A-targets Area: Concerning the implications of different compiler targets O-apple Operating system: Apple (macOS, iOS, tvOS, visionOS, watchOS) PG-exploit-mitigations Project group: Exploit mitigations S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141569 opened May 26, 2025 by workingjubilee Loading…
@bjorn3
70
implement va_arg for x86_64 systemv A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-run-make Area: port run-make Makefiles to rmake.rs F-c_variadic `#![feature(c_variadic)]` S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141538 opened May 25, 2025 by folkertdev Loading…
@workingjubilee
59
atomic_load intrinsic: use const generic parameter for ordering A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#141507 opened May 24, 2025 by RalfJung Loading…
@bjorn3
34
Missed optimization: matches! results in worse codgen than a logical or A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code.
#141497 opened May 24, 2025 by ohadravid
3
Slow and memory-intensive compilation with debug symbols A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged.
#141297 opened May 20, 2025 by speshuric
6
Stabilize if let guards (feature(if_let_guard)) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-meta Area: Issues & PRs about the rust-lang/rust repository itself A-rustc-dev-guide Area: rustc-dev-guide A-testsuite Area: The testsuite used to check the correctness of rustc disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. I-lang-radar Items that are on lang's radar and will need eventual work or consideration. needs-fcp This change is insta-stable, or significant enough to need a team FCP to proceed. S-waiting-on-documentation Status: Waiting on approved PRs to documentation before merging S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. T-lang Relevant to the language team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
#141295 opened May 20, 2025 by Kivooeo Loading…
5 tasks done
@est31
95
1.87 Regression: s390x-unknown-linux-gnu release build gets stuck A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. O-SystemZ Target: SystemZ processors (s390x) regression-from-stable-to-stable Performance or correctness regression from one stable version to another. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141287 opened May 20, 2025 by konstin
9
Inlining leaves extra assembly A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#141144 opened May 17, 2025 by RoDmitry
5
LLVM Assertion failed when optimizing SIMD code on aarch64.apple.darwin A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-SIMD Area: SIMD (Single Instruction Multiple Data) C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ O-apple Operating system: Apple (macOS, iOS, tvOS, visionOS, watchOS) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140933 opened May 12, 2025 by bk-eclipse
7
Extract some shared code from codegen backend target feature handling A-attributes Area: Attributes (`#[…]`, `#![…]`) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140920 opened May 11, 2025 by RalfJung Loading…
1
@nnethercote
21
Target features getting erased when using #[export_name] with names of LLVM intrinsics A-attributes Area: Attributes (`#[…]`, `#![…]`) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#140822 opened May 8, 2025 by sayantn
3
Change codegen of LLVM intrinsics to be name-based, and add llvm linkage support for x86amx, bf16(xN) and i1xN A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-run-make Area: port run-make Makefiles to rmake.rs F-autodiff `#![feature(autodiff)]` S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140763 opened May 7, 2025 by sayantn Loading…
@nikic
44
Many new wasm features are enabled if compile wasm32v1-none with -C linker-plugin-lto flag on LLVM 20+ A-linkers Area: linkers... you gotta love linkers A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-LTO Area: Link-time optimization (LTO) C-bug Category: This is a bug. E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example O-wasm Target: WASM (WebAssembly), http://webassembly.org/ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140174 opened Apr 22, 2025 by StackOverflowExcept1on
3
Bad codegen for comparing struct of two 16bit ints A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-slow Issue: Problems and improvements with respect to performance of generated code.
#140167 opened Apr 22, 2025 by bjorn3
33
armv4t-none-eabi cannot use compiler_fence A-atomic Area: Atomics, barriers, and sync primitives A-codegen Area: Code generation A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140105 opened Apr 21, 2025 by EvansJahja
3
Creating an array can be made 2x faster A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-heavy Issue: Problems and improvements with respect to binary size of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#139875 opened Apr 15, 2025 by abgros
2
Simpler Logic Produces More Complex Output Than Equivalent Expression A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#139851 opened Apr 15, 2025 by ZhonghaoPan-nju
2
[Optimization] Significantly different assembly output for logically equivalent match patterns with string comparisons A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-patterns Relating to patterns and pattern matching C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#139784 opened Apr 14, 2025 by ZhonghaoPan-nju
4
Bounds check not elided for index that should be known to be in-bounds A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. llvm-fixed-upstream Issue expected to be fixed by the next major LLVM upgrade, or backported fixes
#139759 opened Apr 13, 2025 by okaneco
2
assert_eq! of trivially-equal enums with 2 non-empty variants is not optimized out A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such I-slow Issue: Problems and improvements with respect to performance of generated code. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#139733 opened Apr 13, 2025 by ZhonghaoPan-nju
@dianqk
6
A case of compound x86_64 performance regression caused by LLVM 20 and #124810 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-optimization Category: An issue highlighting optimization opportunities or PRs implementing such P-high High priority regression-untriaged Untriaged performance or correctness regression. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#139730 opened Apr 13, 2025 by MoSal
3
ProTip! Follow long discussions with comments:>50.