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Issues list

cg_llvm: Replace some DIBuilder wrappers with LLVM-C API bindings (part 2) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.
#136632 opened Feb 6, 2025 by Zalathar Loading…
2
x86 softfloat target: no way to get LLVM to make local use of the FPU or SIMD registers A-floating-point Area: Floating point numbers and arithmetic 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. C-external-bug Category: issue that is caused by bugs in software beyond our control T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136540 opened Feb 4, 2025 by RalfJung
7
Byte count has poor codegen with autovectorization A-autovectorization Area: Autovectorization, which can impact perf or code size 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 T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136500 opened Feb 3, 2025 by danielhuang
Change rint to roundeven in round_ties_even implementation A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136459 opened Feb 3, 2025 by tgross35
15
Empty RangeInclusive for loop optimizes worse than using Range 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.
#136423 opened Feb 2, 2025 by Sky9x
1
warning: rustc_llvm@0.0.0: Inherited flag "-flto=thin" is not supported by the currently used CC A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)
#136338 opened Jan 31, 2025 by Zeckmathederg
@jieyouxu
6
rustc unexpectedly overflowed its stack! this is a bug A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. S-needs-repro Status: This issue has no reproduction and needs a reproduction to make progress.
#136282 opened Jan 30, 2025 by Julianzs
4
Missed optimization: big immutable locals are not promoted to constants 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.
#136218 opened Jan 28, 2025 by WaffleLapkin
Missed match optimization of riscv 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.
#136216 opened Jan 28, 2025 by WaffleLapkin
-C force-frame-pointers=yes not respected by -Z build-std or opt-level = "z" A-backtrace Area: Backtraces 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.
#136198 opened Jan 28, 2025 by rslawson
13
NaNs are quieted on Emscripten A-ABI Area: Concerning the application binary interface (ABI) A-floating-point Area: Floating point numbers and arithmetic A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-miscompile Issue: Correct Rust code lowers to incorrect machine code O-emscripten Target: 50% off wasm32-unknown-musl. the savings come out of stdio.h, but hey, you get SDL! T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136197 opened Jan 28, 2025 by purplesyringa
2
Should generate llvm.threadlocal.address for TLS accesses A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-thread-locals Area: Thread local storage (TLS) C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136044 opened Jan 25, 2025 by nikic
Workaround for llvm bug for f32x3 saturating fp->int opt-level=0 on aarch64 is fixed in LLVM 20 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-cleanup Category: PRs that clean code up or issues documenting cleanup. O-AArch64 Armv8-A or later processors in AArch64 mode PG-portable-simd Project group: Portable SIMD (https://github.com/rust-lang/project-portable-simd) T-libs Relevant to the library team, which will review and decide on the PR/issue. WG-llvm Working group: LLVM backend code generation
#135982 opened Jan 24, 2025 by programmerjake
1
Meta Tracking Issue for LLVM workarounds A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC PG-portable-simd Project group: Portable SIMD (https://github.com/rust-lang/project-portable-simd) S-tracking-forever Status: Never to be closed. 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. WG-llvm Working group: LLVM backend code generation
#135981 opened Jan 24, 2025 by jieyouxu
u128 manual byte-reading is not optimized, in contrast to u64 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.
#135980 opened Jan 24, 2025 by ProgramCrafter
Basic wrapping arithmetic on pointers is pessimized compared to integers 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.
#135798 opened Jan 20, 2025 by orlp
5
16k-aligned statics crash rustc on Windows A-align Area: alignment control (`repr(align(N))` and so on) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-repr Area: the `#[repr(stuff)]` attribute C-bug Category: This is a bug. E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. O-windows Operating system: Windows T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#135752 opened Jan 20, 2025 by purplesyringa
4
LLVM assertion failure on Wasm exceptions A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. O-emscripten Target: 50% off wasm32-unknown-musl. the savings come out of stdio.h, but hey, you get SDL! O-wasi Operating system: Wasi, Webassembly System Interface O-wasm Target: WASM (WebAssembly), http://webassembly.org/ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#135665 opened Jan 18, 2025 by purplesyringa
19
Tracking Issue for the gpu-kernel ABI 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. C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC O-amdgpu AMDGPU targets O-NVPTX Target: the NVPTX LLVM backend for running rust on GPUs, https://llvm.org/docs/NVPTXUsage.html 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.
#135467 opened Jan 14, 2025 by Flakebi
1 of 14 tasks
rustc segfaults on global_asm!("jz [foo]") on x86_64-pc-windows-msvc (exit code: 0xc0000005, STATUS_ACCESS_VIOLATION) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. O-windows Operating system: Windows O-windows-msvc Toolchain: MSVC, Operating system: Windows T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#135362 opened Jan 11, 2025 by Trolldemorted
8
Performance regression on toy problem, but not for opt-level=1. 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. P-low Low priority regression-untriaged Untriaged performance or correctness regression. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#135241 opened Jan 8, 2025 by TheThirdOne
3
Upstream LLVM libunwind patch for SGX A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-cleanup Category: PRs that clean code up or issues documenting cleanup. O-SGX Target: SGX
#135077 opened Jan 3, 2025 by nikic
2
Tracking Issue for amdgpu target A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC O-amdgpu AMDGPU targets T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#135024 opened Jan 2, 2025 by Flakebi
6 of 16 tasks
matching on functions with similar call stacks breaks optimized backtraces even with debuginfo A-backtrace Area: Backtraces 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-discussion Category: Discussion or questions that doesn't represent real issues. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134909 opened Dec 30, 2024 by jyn514
13
Compile Error on AVR atmega328p with global_asm! in lib.rs A-inline-assembly Area: Inline assembly (`asm!(…)`) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. C-bug Category: This is a bug. C-external-bug Category: issue that is caused by bugs in software beyond our control E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example O-AVR Target: AVR processors (ATtiny, ATmega, etc.) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134758 opened Dec 25, 2024 by xjnxjnxjn
13
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