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Make TypeIdHasher use DefPath::deterministic_hash() for stability.

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This commit is contained in:
Michael Woerister 2016-09-13 08:45:34 -04:00
parent 94d75013bc
commit 75a0dd0fca
1 changed files with 5 additions and 9 deletions
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14
src/librustc/ty/util.rs
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@ -411,15 +411,11 @@ impl<'a, 'gcx, 'tcx> TypeIdHasher<'a, 'gcx, 'tcx> {
}
fn def_id(&mut self, did: DefId) {
// Hash the crate identification information.
let name = self.tcx.crate_name(did.krate);
let disambiguator = self.tcx.crate_disambiguator(did.krate);
self.hash((name, disambiguator));
// Hash the item path within that crate.
// FIXME(#35379) This should use a deterministic
// DefPath hashing mechanism, not the DefIndex.
self.hash(did.index);
// Hash the DefPath corresponding to the DefId, which is independent
// of compiler internal state.
let tcx = self.tcx;
let def_path = tcx.def_path(did);
def_path.deterministic_hash_to(tcx, &mut self.state);
}
}