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Auto merge of #107586 - SparrowLii:parallel-query, r=cjgillot

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Introduce `DynSend` and `DynSync` auto trait for parallel compiler

part of parallel-rustc #101566

This PR introduces `DynSend / DynSync` trait and `FromDyn / IntoDyn` structure in rustc_data_structure::marker. `FromDyn` can dynamically check data structures for thread safety when switching to parallel environments (such as calling `par_for_each_in`). This happens only when `-Z threads > 1` so it doesn't affect single-threaded mode's compile efficiency.

r? `@cjgillot`
This commit is contained in:
bors 2023-05-13 13:47:53 +00:00
commit dd8ec9c88d
26 changed files with 557 additions and 110 deletions
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4
compiler/rustc_metadata/src/rmeta/encoder.rs
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@ -8,7 +8,7 @@ use rustc_data_structures::fingerprint::Fingerprint;
use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
use rustc_data_structures::memmap::{Mmap, MmapMut};
use rustc_data_structures::stable_hasher::{Hash128, HashStable, StableHasher};
use rustc_data_structures::sync::{join, par_iter, Lrc, ParallelIterator};
use rustc_data_structures::sync::{join, par_for_each_in, Lrc};
use rustc_data_structures::temp_dir::MaybeTempDir;
use rustc_hir as hir;
use rustc_hir::def::DefKind;
@ -2131,7 +2131,7 @@ fn prefetch_mir(tcx: TyCtxt<'_>) {
return;
}
par_iter(tcx.mir_keys(())).for_each(|&def_id| {
par_for_each_in(tcx.mir_keys(()), |&def_id| {
let (encode_const, encode_opt) = should_encode_mir(tcx, def_id);
if encode_const {