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rust/compiler/rustc_span
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Matthias Krüger a2ae171b97
Rollup merge of #140485 - Jarcho:from_expansion_opt, r=petrochenkov 
Optimize the codegen for `Span::from_expansion`

See https://godbolt.org/z/bq65Y6bc4 for the difference. the new version is less than half the number of instructions.

Also tried fully writing the function by hand:
```rust
sp.ctxt_or_parent_or_marker != 0
        && (
            sp.len_with_tag_or_marker == BASE_LEN_INTERNED_MARKER
            || sp.len_with_tag_or_marker & PARENT_TAG == 0
        )
```

But that was no better than this PR's current use of `match_span_kind`.
2025-05-02 19:37:56 +02:00
..
src Rollup merge of #140485 - Jarcho:from_expansion_opt, r=petrochenkov 2025-05-02 19:37:56 +02:00
Cargo.toml Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00