bjoernager/rust
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Hash during lowering.

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This commit is contained in:
Camille GILLOT 2021-10-09 19:44:55 +02:00
parent 457de08487
commit ed3c8e86cb
4 changed files with 35 additions and 28 deletions
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27
compiler/rustc_ast_lowering/src/lib.rs
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@ -41,7 +41,9 @@ use rustc_ast::visit;
use rustc_ast::{self as ast, *};
use rustc_ast_pretty::pprust;
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::Lrc;
use rustc_errors::{struct_span_err, Applicability};
use rustc_hir as hir;
@ -467,7 +469,30 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}
}
hir::OwnerInfo { node, attrs, bodies, trait_map }
let (hash, node_hash) = self.hash_body(node, &bodies);
hir::OwnerInfo { hash, node_hash, node, attrs, bodies, trait_map }
}
/// Hash the HIR node twice, one deep and one shallow hash. This allows to differentiate
/// queries which depend on the full HIR tree and those which only depend on the item signature.
fn hash_body(
&mut self,
node: hir::OwnerNode<'hir>,
bodies: &IndexVec<hir::ItemLocalId, Option<&'hir hir::Body<'hir>>>,
) -> (Fingerprint, Fingerprint) {
let mut hcx = self.resolver.create_stable_hashing_context();
let mut stable_hasher = StableHasher::new();
hcx.with_hir_bodies(true, node.def_id(), bodies, |hcx| {
node.hash_stable(hcx, &mut stable_hasher)
});
let full_hash = stable_hasher.finish();
let mut stable_hasher = StableHasher::new();
hcx.with_hir_bodies(false, node.def_id(), bodies, |hcx| {
node.hash_stable(hcx, &mut stable_hasher)
});
let node_hash = stable_hasher.finish();
(full_hash, node_hash)
}
/// This method allocates a new `HirId` for the given `NodeId` and stores it in