bjoernager/rust
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Merge AnalysisDomain into Analysis.

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With `GenKillAnalysis` gone, there is no need for them to be separate.
This commit is contained in:
Nicholas Nethercote 2024-10-10 11:46:29 +11:00
parent 4dc1b4d0b1
commit ba13775319
11 changed files with 62 additions and 105 deletions
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30
compiler/rustc_borrowck/src/dataflow.rs
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@ -7,7 +7,7 @@ use rustc_middle::mir::{
use rustc_middle::ty::{RegionVid, TyCtxt};
use rustc_mir_dataflow::fmt::DebugWithContext;
use rustc_mir_dataflow::impls::{EverInitializedPlaces, MaybeUninitializedPlaces};
use rustc_mir_dataflow::{Analysis, AnalysisDomain, Forward, GenKill, Results, ResultsVisitable};
use rustc_mir_dataflow::{Analysis, Forward, GenKill, Results, ResultsVisitable};
use tracing::debug;
use crate::{BorrowSet, PlaceConflictBias, PlaceExt, RegionInferenceContext, places_conflict};
@ -22,9 +22,9 @@ pub(crate) struct BorrowckResults<'a, 'tcx> {
/// The transient state of the dataflow analyses used by the borrow checker.
#[derive(Debug)]
pub(crate) struct BorrowckDomain<'a, 'tcx> {
pub(crate) borrows: <Borrows<'a, 'tcx> as AnalysisDomain<'tcx>>::Domain,
pub(crate) uninits: <MaybeUninitializedPlaces<'a, 'tcx> as AnalysisDomain<'tcx>>::Domain,
pub(crate) ever_inits: <EverInitializedPlaces<'a, 'tcx> as AnalysisDomain<'tcx>>::Domain,
pub(crate) borrows: <Borrows<'a, 'tcx> as Analysis<'tcx>>::Domain,
pub(crate) uninits: <MaybeUninitializedPlaces<'a, 'tcx> as Analysis<'tcx>>::Domain,
pub(crate) ever_inits: <EverInitializedPlaces<'a, 'tcx> as Analysis<'tcx>>::Domain,
}
impl<'a, 'tcx> ResultsVisitable<'tcx> for BorrowckResults<'a, 'tcx> {
@ -427,7 +427,7 @@ impl<'a, 'tcx> Borrows<'a, 'tcx> {
/// That means they went out of a nonlexical scope
fn kill_loans_out_of_scope_at_location(
&self,
trans: &mut <Self as AnalysisDomain<'tcx>>::Domain,
trans: &mut <Self as Analysis<'tcx>>::Domain,
location: Location,
) {
// NOTE: The state associated with a given `location`
@ -449,7 +449,7 @@ impl<'a, 'tcx> Borrows<'a, 'tcx> {
/// Kill any borrows that conflict with `place`.
fn kill_borrows_on_place(
&self,
trans: &mut <Self as AnalysisDomain<'tcx>>::Domain,
trans: &mut <Self as Analysis<'tcx>>::Domain,
place: Place<'tcx>,
) {
debug!("kill_borrows_on_place: place={:?}", place);
@ -490,7 +490,14 @@ impl<'a, 'tcx> Borrows<'a, 'tcx> {
}
}
impl<'tcx> rustc_mir_dataflow::AnalysisDomain<'tcx> for Borrows<'_, 'tcx> {
/// Forward dataflow computation of the set of borrows that are in scope at a particular location.
/// - we gen the introduced loans
/// - we kill loans on locals going out of (regular) scope
/// - we kill the loans going out of their region's NLL scope: in NLL terms, the frontier where a
/// region stops containing the CFG points reachable from the issuing location.
/// - we also kill loans of conflicting places when overwriting a shared path: e.g. borrows of
/// `a.b.c` when `a` is overwritten.
impl<'tcx> rustc_mir_dataflow::Analysis<'tcx> for Borrows<'_, 'tcx> {
type Domain = BitSet<BorrowIndex>;
const NAME: &'static str = "borrows";
@ -504,16 +511,7 @@ impl<'tcx> rustc_mir_dataflow::AnalysisDomain<'tcx> for Borrows<'_, 'tcx> {
// no borrows of code region_scopes have been taken prior to
// function execution, so this method has no effect.
}
}
/// Forward dataflow computation of the set of borrows that are in scope at a particular location.
/// - we gen the introduced loans
/// - we kill loans on locals going out of (regular) scope
/// - we kill the loans going out of their region's NLL scope: in NLL terms, the frontier where a
/// region stops containing the CFG points reachable from the issuing location.
/// - we also kill loans of conflicting places when overwriting a shared path: e.g. borrows of
/// `a.b.c` when `a` is overwritten.
impl<'tcx> rustc_mir_dataflow::Analysis<'tcx> for Borrows<'_, 'tcx> {
fn apply_before_statement_effect(
&mut self,
trans: &mut Self::Domain,