rust-lang / rust-lang/rustc_codegen_gcc
Further optimize the popcount intrinsic
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Nobody has claimed this yet.
perf
- Dominant language
- Rust
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- Merged PRs (30d)
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Description
It was optimized in #348, but not as much as it could due to this GCC bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101822
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 issue #348 and GCC bug 101822, then locate the popcount intrinsic implementation and any related tests. Compare the current optimization with the limitation described in the GCC report. Done means implementing the remaining optimization and confirming the resulting code-generation behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- compilers, performance
- Issue type
- Refactor
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100