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Rollup merge of #122588 - klensy:imported_source_file, r=michaelwoerister

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less useless filter calls in imported_source_file

This reduces calls to `filter` greatly, giving 0.3% instructions win on some tests.
This commit is contained in:
Matthias Krüger 2024-03-18 16:27:08 +01:00 committed by GitHub
commit acc45ebf72
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1 changed files with 10 additions and 10 deletions
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20
compiler/rustc_metadata/src/rmeta/decoder.rs
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@ -1590,17 +1590,17 @@ fn filter<'a>(sess: &Session, path: Option<&'a Path>) -> Option<&'a Path> {
})
}
// Translate the virtual `/rustc/$hash` prefix back to a real directory
// that should hold actual sources, where possible.
//
// NOTE: if you update this, you might need to also update bootstrap's code for generating
// the `rust-src` component in `Src::run` in `src/bootstrap/dist.rs`.
let virtual_rust_source_base_dir = [
filter(sess, option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR").map(Path::new)),
filter(sess, sess.opts.unstable_opts.simulate_remapped_rust_src_base.as_deref()),
];
let try_to_translate_virtual_to_real = |name: &mut rustc_span::FileName| {
// Translate the virtual `/rustc/$hash` prefix back to a real directory
// that should hold actual sources, where possible.
//
// NOTE: if you update this, you might need to also update bootstrap's code for generating
// the `rust-src` component in `Src::run` in `src/bootstrap/dist.rs`.
let virtual_rust_source_base_dir = [
filter(sess, option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR").map(Path::new)),
filter(sess, sess.opts.unstable_opts.simulate_remapped_rust_src_base.as_deref()),
];
debug!(
"try_to_translate_virtual_to_real(name={:?}): \
virtual_rust_source_base_dir={:?}, real_rust_source_base_dir={:?}",