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Issues list

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
6
Add amdgpu target A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. S-waiting-on-MCP Status: PR has a compiler MCP and is waiting for the compiler MCP to complete. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134740 opened Dec 25, 2024 by Flakebi Loading…
@jieyouxu
11
Missed optimization: bounds check not elided for i * s < n when 0 <= i < n / s 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.
#134636 opened Dec 22, 2024 by SuperSamus
1
raw-dylib usage in std broke thumbv7a-*-windows-msvc targets -Zbuild-std Unstable Cargo option: Compile the standard library yourself. A-cross Area: Cross compilation 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-msvc Toolchain: MSVC, Operating system: Windows T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134565 opened Dec 20, 2024 by bdbai
Don't know how to soften fpowi to fpow on x86 uefi targets A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-external-bug Category: issue that is caused by bugs in software beyond our control O-UEFI UEFI T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134508 opened Dec 19, 2024 by usamoi
2
Slice bounds check not elided in trivial case when using a local varaible outside of a branch A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. 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.
#134466 opened Dec 18, 2024 by ChrisDenton
compiler fails on arithmetic operations 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. E-needs-mcve Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable Example I-crash Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics. llvm-fixed-upstream Issue expected to be fixed by the next major LLVM upgrade, or backported fixes T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134457 opened Dec 18, 2024 by ohad-starkware
@DianQK
1
aarch64-unknown-none-softfloat: ABI unsoundness when enabling "neon" feature 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-feature Area: Enabling/disabling target features like AVX, Neon, etc. I-prioritize Issue: Indicates that prioritization has been requested for this issue. I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness O-AArch64 Armv8-A or later processors in AArch64 mode T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134375 opened Dec 16, 2024 by RalfJung
6
Rust's i128 return ABI does not agree with Clang and GCC on Windows targets 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-bug Category: This is a bug. O-windows Operating system: Windows T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134288 opened Dec 13, 2024 by tgross35
cg_llvm: Replace most of our DIBuilder wrappers with LLVM-C API bindings 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.
#134009 opened Dec 7, 2024 by Zalathar Loading…
@workingjubilee
16
Revamp cg_llvm debuginfo handling to use the LLVM-C API 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-cleanup Category: PRs that clean code up or issues documenting cleanup. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134001 opened Dec 7, 2024 by workingjubilee
1
Revamp cg_llvm debuginfo handling to use records 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-cleanup Category: PRs that clean code up or issues documenting cleanup. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134000 opened Dec 7, 2024 by workingjubilee
1
Update tests/ui/codegen/target-cpus.rs after upgrading to LLVM 20 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-testsuite Area: The testsuite used to check the correctness of rustc C-cleanup Category: PRs that clean code up or issues documenting cleanup. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133919 opened Dec 5, 2024 by TimNN
enums with disjoint ranges should emit more precise llvm.range metadata 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.
#133822 opened Dec 3, 2024 by Kmeakin
1
2
tests/assembly/x86_64-bigint-add.rs broken with LLVM 20 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-testsuite Area: The testsuite used to check the correctness of rustc C-bug Category: This is a bug. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133754 opened Dec 2, 2024 by krasimirgg
1
Missed optimization in sum of remainders 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.
#133621 opened Nov 29, 2024 by notoria
1
Missed optimization when looping over bytes of a value 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 llvm-fixed-upstream Issue expected to be fixed by the next major LLVM upgrade, or backported fixes T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133528 opened Nov 27, 2024 by theemathas
3
avr-rjmp-offset is flaky on x86_64-mingw 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-run-make Area: port run-make Makefiles to rmake.rs A-testsuite Area: The testsuite used to check the correctness of rustc C-bug Category: This is a bug. C-external-bug Category: issue that is caused by bugs in software beyond our control I-flaky-test Issue: A test is flaky/unreliable/spuriously fails O-AVR Target: AVR processors (ATtiny, ATmega, etc.) O-windows-gnu Toolchain: GNU, Operating system: Windows T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133480 opened Nov 25, 2024 by jieyouxu
1
apple-m3 detected as the native CPU for nightly rustc on apple-m4 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-external-bug Category: issue that is caused by bugs in software beyond our control O-AArch64 Armv8-A or later processors in AArch64 mode 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.
#133414 opened Nov 24, 2024 by mmizutani
1
4
[LoongArch] SIMD intrinsics not fully inlined in caller with target feature globally enabled 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. llvm-fixed-upstream Issue expected to be fixed by the next major LLVM upgrade, or backported fixes O-loongarch Target: LoongArch (LA32R, LA32S, LA64) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133281 opened Nov 21, 2024 by heiher
5
tests/ui/abi/sparcv8plus.rs#sparc_cpu_v9 broken in LLVM 20 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-bug Category: This is a bug. O-SPARC Target: SPARC processors T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#132957 opened Nov 12, 2024 by durin42
6
Build failure with llvm 19 A-linkage Area: linking into static, shared libraries and binaries A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. E-needs-investigation Call for partcipation: This issues needs some investigation to determine current status O-AArch64 Armv8-A or later processors in AArch64 mode requires-custom-config This issue requires custom config/build for rustc in some way T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)
#132896 opened Nov 11, 2024 by blackcross86
4
Code size regression iterating an array (opt-level=z) after 1.82.0 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. I-heavy Issue: Problems and improvements with respect to binary size 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.
#132890 opened Nov 11, 2024 by dcci
1
Code size regression (opt-level=z) after 1.82.0 A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. C-bug Category: This is a bug. 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.
#132888 opened Nov 11, 2024 by dcci
1
Support calling functions with SIMD vectors that couldn't be used in the caller 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-SIMD Area: SIMD (Single Instruction Multiple Data) C-feature-request Category: A feature request, i.e: not implemented / a PR. T-opsem Relevant to the opsem team WG-llvm Working group: LLVM backend code generation
#132865 opened Nov 10, 2024 by RalfJung
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