The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

100 Open Issues Need Help Last updated: Jul 1, 2026

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good first issue libc

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue ClangIR

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend confirmed crash-on-valid need-regression-test

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
enhancement good first issue clang-format

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend clang:diagnostics

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:RISC-V missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue ClangIR

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend crash-on-invalid confirmed regression:22

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:codegen crash

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:RISC-V missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue c++20 clang:frontend confirmed crash

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend crash regression:16 generated by fuzzer

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
enhancement documentation good first issue llvm:adt

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
documentation good first issue clang

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue c++11 c++14 clang:frontend diverges-from:gcc

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend compiler-rt:asan crash-on-invalid generated by fuzzer

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang-tidy check-request

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue performance optimization:AMDCPU

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
metaissue good first issue llvm:globalisel

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 bugzilla

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang-tidy confirmed crash-on-valid

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
help wanted clang:modules ABI platform:windows

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue confirmed crash-on-valid llvm:transforms generated by fuzzer regression:14

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
documentation good first issue llvm

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue code-cleanup floating-point constant-folding

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue libc++ code-cleanup

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang-tidy crash-on-invalid generated by fuzzer

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:static analyzer crash generated by fuzzer

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang-tidy false-negative

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue test-suite ClangIR

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 bugzilla

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue orcjit jitlink platform:macos objective-c clang-repl orc-rt

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang-format

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:instcombine missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang-tidy check-request

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend constexpr

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:optimizations llvm:instcombine missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend confirmed

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:diagnostics

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 clang:frontend clang:headers constexpr clang:bytecode

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:instcombine

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue tools:llvm-dwarfdump

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:instcombine missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:X86 missed-optimization llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue missed-optimization floating-point llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend clang:openmp

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
enhancement good first issue c++11 clang:frontend quality-of-implementation slow-compile

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:instcombine floating-point

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue loopoptim llvm:analysis

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:analysis

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
help wanted good first issue clang-include-cleaner

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue backend:AMDGPU missed-optimization

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue clang:frontend code-quality

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue ClangIR

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM
good first issue llvm:SelectionDAG

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.

LLVM