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Auto merge of #80602 - tgnottingham:cratemetadata_you_aint_special, r=michaelwoerister

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Remove DepKind::CrateMetadata and pre-allocation of DepNodes

Remove much of the special-case handling around crate metadata
dependency tracking by replacing `DepKind::CrateMetadata` and the
pre-allocation of corresponding `DepNodes` with on-demand invocation
of the `crate_hash` query.
This commit is contained in:
bors 2021-01-15 21:13:35 +00:00
commit fcbd305ee9
10 changed files with 15 additions and 107 deletions
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15
compiler/rustc_middle/src/dep_graph/mod.rs
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@ -116,20 +116,9 @@ impl<'tcx> DepContext for TyCtxt<'tcx> {
// be removed. https://github.com/rust-lang/rust/issues/62649 is one such
// bug that must be fixed before removing this.
match dep_node.kind {
DepKind::hir_owner | DepKind::hir_owner_nodes | DepKind::CrateMetadata => {
DepKind::hir_owner | DepKind::hir_owner_nodes => {
if let Some(def_id) = dep_node.extract_def_id(*self) {
if def_id_corresponds_to_hir_dep_node(*self, def_id.expect_local()) {
if dep_node.kind == DepKind::CrateMetadata {
// The `DefPath` has corresponding node,
// and that node should have been marked
// either red or green in `data.colors`.
bug!(
"DepNode {:?} should have been \
pre-marked as red or green but wasn't.",
dep_node
);
}
} else {
if !def_id_corresponds_to_hir_dep_node(*self, def_id.expect_local()) {
// This `DefPath` does not have a
// corresponding `DepNode` (e.g. a
// struct field), and the ` DefPath`