Enable `outline-atomics` by default on aarch64 Apple targets
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- Dominant language
- Rust
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Description
This was originally part of https://github.com/rust-lang/rust/pull/144938, but per https://github.com/rust-lang/rust/pull/144938#pullrequestreview-3208320060 this does not seem to work correctly. Seems like there may be some behavior to clarify with LLVM, or a possible bug there.
This does not affect Darwin or *-sim since LSE is already in the baseline. I have a branch enabling things here https://github.com/tgross35/rust/commit/apple-outline-atomics/.
cc @madsmtm
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading pull request 144938 and its review discussion, then inspect the apple-outline-atomics branch linked in the issue. Clarify the LLVM behavior affecting aarch64 Apple targets, excluding Darwin and *-sim, and verify that enabling outline-atomics by default works correctly for the remaining targets.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100