rust-lang/rustc_codegen_cranelift

View on GitHub

Cranelift based backend for rustc

Stars: 2.1k
Forks: 157
Open beginner issues: 0
Indexed issues: 90
Avg merge: 1d 19h
Merged PRs (30d): 3

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

90 issues indexed so far

msvc: small float aggregates are returned incorrectly with `extern "Rust"` Open

A-abi O-windows O-x86_64

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/rustc_codegen_cranelift#1703 · 4 comments · Opened Sep 18, 2026
"llvm.x86.pclmulqdq.256 is not yet supported" in crc32fast Open

A-core-arch C-enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1699 · 7 comments · 1 reaction · Opened Aug 29, 2026
Implement simd_funnel_shl and simd_funnel_shr intrinsics Open

C-enhancement good first issue

Difficulty 3/5 1-2 days Newbie friendliness 72/100

rust-lang/rustc_codegen_cranelift#1696 · 1 comment · Opened Aug 26, 2026
`cargo-clif build` slower than `cargo build`! Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1694 · 4 comments · Opened Aug 24, 2026
ice `Can't change TLS data object to normal or in the opposite way` Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

rust-lang/rustc_codegen_cranelift#1691 · Opened Aug 15, 2026
ICE: `naked_asm!` unreachable Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

rust-lang/rustc_codegen_cranelift#1690 · 2 comments · Opened Aug 11, 2026
Add support for suppressing name mangling with `\01` prefix Open

O-macos

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/rustc_codegen_cranelift#1689 · 16 comments · Opened Aug 10, 2026
Bench CI job fails since latest nightly Open

A-ci C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1686 · Opened Aug 7, 2026
Support defining C variadic functions Open

A-abi C-enhancement S-blocked

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1677 · 2 comments · Opened Jul 22, 2026
cranelift ICE related to lowering saturating_sub Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/rustc_codegen_cranelift#1670 · 6 comments · Opened Jun 29, 2026
ICE `guard_size * probe_count` is too large to fit in a 32-bit immediate Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rust-lang/rustc_codegen_cranelift#1656 · 3 comments · Opened May 28, 2026
Discussion: Mitigating supply chain & CI attacks via delayed dependency updates Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1653 · 2 comments · Opened May 14, 2026
ICE compiler/rustc_codegen_cranelift/src/constant.rs Open

C-bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rust-lang/rustc_codegen_cranelift#1652 · 1 comment · Opened Apr 26, 2026
Cranelift caller gets wrong Quat from LLVM callee on Win64 Open

A-abi C-bug O-windows O-x86_64

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1647 · Opened Apr 19, 2026
Access to global variable metadata? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1646 · 1 comment · Opened Apr 18, 2026
[ICE]: Cranelift Unimplemented Relocation Open

A-debuginfo C-bug O-arm O-macos

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rust-lang/rustc_codegen_cranelift#1633 · 5 comments · Opened Mar 8, 2026
Math operations for f16 incorrectly implemented Open

C-bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1622 · 5 comments · Opened Jan 9, 2026
Compilation failure with cranelift due to simd intrinsics Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rust-lang/rustc_codegen_cranelift#1615 · 3 comments · Opened Dec 24, 2025
link error: undefined symbol in Window msvc : link dynamic library Open

C-bug O-windows

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/rustc_codegen_cranelift#1610 · 6 comments · 1 reaction · Opened Dec 10, 2025
Build dist artifacts with LTO Open

A-ci C-enhancement compile-time

Difficulty 4/5 3-5 days Newbie friendliness 30/100

rust-lang/rustc_codegen_cranelift#1607 · Opened Nov 26, 2025
ICE `ArgAbi left behind` Open

A-abi C-bug S-blocked

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1591 · 2 comments · Opened Aug 23, 2025
Investigate why the tests/run-make/used-proc-macro rustc test still fails Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1589 · Opened Jul 25, 2025
pathfinder_simd doesn't compile on arm64 Open

A-core-arch C-bug O-arm

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1583 · 1 reaction · Opened Jun 18, 2025
Wrong Nightly version used for macros / build scripts Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1573 · 3 comments · Opened Apr 21, 2025
Support protected visibility Open

S-blocked upstream

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1571 · Opened Apr 20, 2025
unsupported x86 sse2 intrinsic `llvm.x86.sse2.psll.q` Open

A-core-arch C-enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1569 · 1 comment · Opened Apr 9, 2025
Support unwinding on panics Open

A-unwind C-enhancement S-blocked

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1567 · 5 comments · 8 reactions · Opened Mar 27, 2025
Compiling with Cranelift leads to Error 101 Open

A-debuginfo C-bug O-arm O-macos

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1561 · 2 comments · Opened Mar 4, 2025
ICE: src/isa/x64/abi.rs:743:68: 'called `Result::unwrap()` on an `Err` value: TryFromIntError(()) Open

C-bug upstream

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1552 · 1 comment · Opened Jan 5, 2025
Implement vendor intrinsics by pre-compiling using LLVM Open

A-core-arch C-enhancement

rust-lang/rustc_codegen_cranelift#1547 · 1 comment · 7 reactions · 1 assignee · Opened Dec 11, 2024
Unimplemented x86 llvm intrinsic vcvtph2ps Open

A-core-arch C-enhancement O-x86_64

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rust-lang/rustc_codegen_cranelift#1545 · 5 comments · Opened Nov 21, 2024
Bevy dynamic-linking makes the program crash Open

C-bug O-windows

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1530 · 15 comments · 1 reaction · Opened Sep 14, 2024
Tracking issue for abi-cafe failures Open

A-abi C-bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1525 · 7 comments · Opened Aug 5, 2024
Linking error with aws_lc_rs Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/rustc_codegen_cranelift#1520 · 30 comments · 23 reactions · Opened Jul 21, 2024
Unable to build rustc_codegen_cranelift on windows with rust-lld Open

C-bug O-windows

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1503 · 3 comments · Opened Jun 29, 2024
-Zcoverage is unimplemented Open

C-enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1494 · 6 comments · Opened Jun 4, 2024
Support tiny_skia Open

A-core-arch C-enhancement O-x86_64

Difficulty 4/5 3-5 days Newbie friendliness 30/100

rust-lang/rustc_codegen_cranelift#1492 · 4 comments · Opened May 26, 2024
undefined symbol: compiler_builtins::mem when building with cranelift + lld-link.exe on windows (and lld: error on gnu) Open

C-bug O-windows

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1480 · 5 comments · Opened Apr 6, 2024
Apply fixes from "https://github.com/rust-lang/rust/pull/122619" to cg_clif Open

A-abi C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1477 · Opened Apr 3, 2024
[Bug] Failed to compile under linux powerpc64le Open

C-enhancement S-blocked upstream

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1471 · 1 comment · Opened Mar 27, 2024
Warn on opt-level > 1 Open

C-enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1468 · Opened Mar 24, 2024
Copy byval argument to local stackslot if alignment is insufficient Open

A-abi C-bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1465 · Opened Mar 16, 2024
should be implemented in ISLE: inst = `v12 = smulhi.i8 v0, v0`, type = `Some(types::I8)` Open

C-bug O-x86_64 upstream

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1455 · 10 comments · Opened Feb 3, 2024
ICE `assertion `left == right` failed: write_cvalue_transmute: types::I32 -> types::I64` Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rust-lang/rustc_codegen_cranelift#1452 · 1 comment · Opened Jan 29, 2024
ICE: `Offset in NominalSPOffset is greater than 2GB; should hit impl limit first: TryFromIntError(())` Open

C-bug upstream

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-lang/rustc_codegen_cranelift#1434 · 13 comments · Opened Dec 3, 2023
Valgrind `segmentation fault` when trying to run binary Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1424 · 5 comments · Opened Nov 11, 2023
missing avx2 intrinsics Open

A-core-arch

Difficulty 4/5 3-5 days Newbie friendliness 28/100

rust-lang/rustc_codegen_cranelift#1419 · 10 comments · Opened Nov 8, 2023
Add sponsor button and link to liberapay Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

rust-lang/rustc_codegen_cranelift#1390 · 6 reactions · Opened Jul 31, 2023
Implement #![debugger_visualizer] Open

A-debuginfo C-enhancement good first issue

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/rustc_codegen_cranelift#1386 · 25 comments · Opened Jul 22, 2023
Release performances indicator? Open

C-enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-lang/rustc_codegen_cranelift#1375 · 3 comments · Opened May 23, 2023

rust-lang/rustc_codegen_cranelift

Get new issues in your inbox