Skip to content

Add -Zdead-fn-elimination: skip codegen of functions unreachable from the entry point #158220

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
yijunyu wants to merge 6 commits into
base: main
Choose a base branch
from
Open

Add -Zdead-fn-elimination: skip codegen of functions unreachable from the entry point #158220

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
4785846
Add -Zdead-fn-elimination: skip codegen of functions unreachable from…
yijunyu Jun 21, 2026
b71b3b4
Add cross-crate used-set consumption to -Zdead-fn-elimination
yijunyu Jul 8, 2026
aa49806
Add MIR-walk used-set probe for first-build cross-crate dead-fn elimi…
yijunyu Jul 9, 2026
aa9005b
Add -Zdead-fn-wait-used-set for in-process deferred codegen
yijunyu Jul 9, 2026
b3de7c2
Update used_set module doc to match implementation
yijunyu Jul 9, 2026
9dd3363
used-set probe: append (union across crates) instead of overwrite
yijunyu Jul 9, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions compiler/rustc_interface/src/passes.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1262,6 +1262,10 @@ fn analysis(tcx: TyCtxt<'_>, (): ()) {
});
});
}

// Cross-crate dead-fn elimination: if requested, walk this crate's MIR now (before
// codegen, so it works on `--emit=metadata`) and write per-dependency used-set files.
rustc_monomorphize::emit_used_set_if_requested(tcx);
}

/// Runs the codegen backend, after which the AST and analysis can
Expand Down
Loading
Loading