bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Prefetch queries used by the metadata encoder

Browse source
This commit is contained in:
John Kåre Alsaker 2020-01-04 21:42:28 +01:00
parent 3c6f982cc9
commit 6cd0dcade7
1 changed files with 17 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/librustc_metadata/rmeta/encoder.rs
View file

@ -18,7 +18,7 @@ use rustc_ast::attr;
use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::FxHashMap;
use rustc_data_structures::stable_hasher::StableHasher;
use rustc_data_structures::sync::Lrc;
use rustc_data_structures::sync::{join, par_for_each_in, Lrc};
use rustc_hir as hir;
use rustc_hir::def::CtorKind;
use rustc_hir::def_id::{CrateNum, DefId, DefIndex, LocalDefId, CRATE_DEF_INDEX, LOCAL_CRATE};
@ -1721,6 +1721,22 @@ impl<'tcx, 'v> ItemLikeVisitor<'v> for ImplVisitor<'tcx> {
// generated regardless of trailing bytes that end up in it.
pub(super) fn encode_metadata(tcx: TyCtxt<'_>) -> EncodedMetadata {
join(
|| encode_metadata_impl(tcx),
|| {
// Prefetch some queries used by metadata encoding
tcx.dep_graph.with_ignore(|| {
par_for_each_in(tcx.mir_keys(LOCAL_CRATE), |&def_id| {
tcx.optimized_mir(def_id);
tcx.promoted_mir(def_id);
});
})
},
)
.0
}
fn encode_metadata_impl(tcx: TyCtxt<'_>) -> EncodedMetadata {
let mut encoder = opaque::Encoder::new(vec![]);
encoder.emit_raw_bytes(METADATA_HEADER);