bjoernager/rust
bjoernager/rust
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Do not re-hash foreign spans.

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This commit is contained in:
Camille GILLOT 2021-10-02 21:14:52 +02:00
parent ce21756ed3
commit daf8903e8e
2 changed files with 27 additions and 11 deletions
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27
compiler/rustc_query_impl/src/on_disk_cache.rs
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@ -664,7 +664,21 @@ impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for ExpnId {
let data: ExpnData = decoder
.with_position(pos.to_usize(), |decoder| decode_tagged(decoder, TAG_EXPN_DATA))?;
rustc_span::hygiene::register_local_expn_id(data, hash)
let expn_id = rustc_span::hygiene::register_local_expn_id(data, hash);
#[cfg(debug_assertions)]
{
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
let mut hcx = decoder.tcx.create_stable_hashing_context();
let mut hasher = StableHasher::new();
hcx.while_hashing_spans(true, |hcx| {
expn_id.expn_data().hash_stable(hcx, &mut hasher)
});
let local_hash: u64 = hasher.finish();
debug_assert_eq!(hash.local_hash(), local_hash);
}
expn_id
} else {
let index_guess = decoder.foreign_expn_data[&hash];
decoder.tcx.cstore_untracked().expn_hash_to_expn_id(
@ -675,16 +689,7 @@ impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for ExpnId {
)
};
#[cfg(debug_assertions)]
{
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
let mut hcx = decoder.tcx.create_stable_hashing_context();
let mut hasher = StableHasher::new();
hcx.while_hashing_spans(true, |hcx| expn_id.expn_data().hash_stable(hcx, &mut hasher));
let local_hash: u64 = hasher.finish();
debug_assert_eq!(hash.local_hash(), local_hash);
}
debug_assert_eq!(expn_id.krate, krate);
Ok(expn_id)
}
}