rust/compiler/rustc_codegen_ssa
Matthias Krüger c3cd05198a
Rollup merge of #113872 - nnethercote:tweak-cgu-sorting, r=pnkfelix
Tweak CGU sorting in a couple of places.

In `base.rs`, tweak how the CGU size interleaving works. Since #113777, it's much more common to have multiple CGUs with identical sizes. With the existing code these same-sized items ended up in the opposite-to-desired order due to the stable sorting. The code now starts with a reverse sort (like is done in `partitioning.rs`) which gives the behaviour we want. This doesn't matter much for perf, but makes profiles in `samply` look more like what we expect.

In `partitioning.rs`, we can use `sort_by_key` instead of `sort_by_cached_key` because `CGU::size_estimate()` is cheap. (There is an identical CGU sort earlier in that function that already uses `sort_by_key`.)

r? `@pnkfelix`
2023-07-27 06:04:12 +02:00
..
src Rollup merge of #113872 - nnethercote:tweak-cgu-sorting, r=pnkfelix 2023-07-27 06:04:12 +02:00
Cargo.toml Don't compress dylib metadata 2023-07-19 14:47:06 +00:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00
messages.ftl Add note about writing native-static-libs to file 2023-07-20 11:04:32 -07:00

README.md

Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.