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Auto merge of #108794 - nnethercote:avoid-unnecessary-hashing, r=cjgillot

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Avoid unnecessary hashing

I noticed some stable hashing being done in a non-incremental build. It turns out that some of this is necessary to compute the crate hash, but some of it is not. Removing the unnecessary hashing is a perf win.

r? `@cjgillot`
This commit is contained in:
bors 2023-03-12 06:48:30 +00:00
commit 150cb38147
10 changed files with 100 additions and 82 deletions
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2
compiler/rustc_mir_transform/src/coverage/mod.rs
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@ -577,5 +577,5 @@ fn get_body_span<'tcx>(
fn hash_mir_source<'tcx>(tcx: TyCtxt<'tcx>, hir_body: &'tcx rustc_hir::Body<'tcx>) -> u64 {
// FIXME(cjgillot) Stop hashing HIR manually here.
let owner = hir_body.id().hir_id.owner;
tcx.hir_owner_nodes(owner).unwrap().hash_including_bodies.to_smaller_hash()
tcx.hir_owner_nodes(owner).unwrap().opt_hash_including_bodies.unwrap().to_smaller_hash()
}