bjoernager/rust
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Remove unnecessary lifetimes in dataflow structs.

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There are four related dataflow structs: `MaybeInitializedPlaces`,
`MaybeUninitializedPlaces`, and `EverInitializedPlaces`,
`DefinitelyInitializedPlaces`. They all have a `&Body` and a
`&MoveData<'tcx>` field. The first three use different lifetimes for the
two fields, but the last one uses the same lifetime for both.

This commit changes the first three to use the same lifetime, removing
the need for one of the lifetimes. Other structs that also lose a
lifetime as a result of this are `LivenessContext`, `LivenessResults`,
`InitializationData`.

It then does similar things in various other structs.
This commit is contained in:
Nicholas Nethercote 2024-09-06 09:18:17 +10:00
parent adf8d168af
commit 3fe7dd6893
20 changed files with 141 additions and 151 deletions
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46
compiler/rustc_mir_dataflow/src/impls/initialized.rs
View file

@ -51,15 +51,15 @@ use crate::{
/// Similarly, at a given `drop` statement, the set-intersection
/// between this data and `MaybeUninitializedPlaces` yields the set of
/// places that would require a dynamic drop-flag at that statement.
pub struct MaybeInitializedPlaces<'a, 'mir, 'tcx> {
pub struct MaybeInitializedPlaces<'a, 'tcx> {
tcx: TyCtxt<'tcx>,
body: &'mir Body<'tcx>,
body: &'a Body<'tcx>,
move_data: &'a MoveData<'tcx>,
skip_unreachable_unwind: bool,
}
impl<'a, 'mir, 'tcx> MaybeInitializedPlaces<'a, 'mir, 'tcx> {
pub fn new(tcx: TyCtxt<'tcx>, body: &'mir Body<'tcx>, move_data: &'a MoveData<'tcx>) -> Self {
impl<'a, 'tcx> MaybeInitializedPlaces<'a, 'tcx> {
pub fn new(tcx: TyCtxt<'tcx>, body: &'a Body<'tcx>, move_data: &'a MoveData<'tcx>) -> Self {
MaybeInitializedPlaces { tcx, body, move_data, skip_unreachable_unwind: false }
}
@ -85,7 +85,7 @@ impl<'a, 'mir, 'tcx> MaybeInitializedPlaces<'a, 'mir, 'tcx> {
}
}
impl<'a, 'mir, 'tcx> HasMoveData<'tcx> for MaybeInitializedPlaces<'a, 'mir, 'tcx> {
impl<'a, 'tcx> HasMoveData<'tcx> for MaybeInitializedPlaces<'a, 'tcx> {
fn move_data(&self) -> &MoveData<'tcx> {
self.move_data
}
@ -126,17 +126,17 @@ impl<'a, 'mir, 'tcx> HasMoveData<'tcx> for MaybeInitializedPlaces<'a, 'mir, 'tcx
/// Similarly, at a given `drop` statement, the set-intersection
/// between this data and `MaybeInitializedPlaces` yields the set of
/// places that would require a dynamic drop-flag at that statement.
pub struct MaybeUninitializedPlaces<'a, 'mir, 'tcx> {
pub struct MaybeUninitializedPlaces<'a, 'tcx> {
tcx: TyCtxt<'tcx>,
body: &'mir Body<'tcx>,
body: &'a Body<'tcx>,
move_data: &'a MoveData<'tcx>,
mark_inactive_variants_as_uninit: bool,
skip_unreachable_unwind: BitSet<mir::BasicBlock>,
}
impl<'a, 'mir, 'tcx> MaybeUninitializedPlaces<'a, 'mir, 'tcx> {
pub fn new(tcx: TyCtxt<'tcx>, body: &'mir Body<'tcx>, move_data: &'a MoveData<'tcx>) -> Self {
impl<'a, 'tcx> MaybeUninitializedPlaces<'a, 'tcx> {
pub fn new(tcx: TyCtxt<'tcx>, body: &'a Body<'tcx>, move_data: &'a MoveData<'tcx>) -> Self {
MaybeUninitializedPlaces {
tcx,
body,
@ -165,7 +165,7 @@ impl<'a, 'mir, 'tcx> MaybeUninitializedPlaces<'a, 'mir, 'tcx> {
}
}
impl<'a, 'tcx> HasMoveData<'tcx> for MaybeUninitializedPlaces<'a, '_, 'tcx> {
impl<'tcx> HasMoveData<'tcx> for MaybeUninitializedPlaces<'_, 'tcx> {
fn move_data(&self) -> &MoveData<'tcx> {
self.move_data
}
@ -251,24 +251,24 @@ impl<'a, 'tcx> HasMoveData<'tcx> for DefinitelyInitializedPlaces<'a, 'tcx> {
/// c = S; // {a, b, c, d }
/// }
/// ```
pub struct EverInitializedPlaces<'a, 'mir, 'tcx> {
body: &'mir Body<'tcx>,
pub struct EverInitializedPlaces<'a, 'tcx> {
body: &'a Body<'tcx>,
move_data: &'a MoveData<'tcx>,
}
impl<'a, 'mir, 'tcx> EverInitializedPlaces<'a, 'mir, 'tcx> {
pub fn new(body: &'mir Body<'tcx>, move_data: &'a MoveData<'tcx>) -> Self {
impl<'a, 'tcx> EverInitializedPlaces<'a, 'tcx> {
pub fn new(body: &'a Body<'tcx>, move_data: &'a MoveData<'tcx>) -> Self {
EverInitializedPlaces { body, move_data }
}
}
impl<'a, 'tcx> HasMoveData<'tcx> for EverInitializedPlaces<'a, '_, 'tcx> {
impl<'tcx> HasMoveData<'tcx> for EverInitializedPlaces<'_, 'tcx> {
fn move_data(&self) -> &MoveData<'tcx> {
self.move_data
}
}
impl<'a, 'mir, 'tcx> MaybeInitializedPlaces<'a, 'mir, 'tcx> {
impl<'a, 'tcx> MaybeInitializedPlaces<'a, 'tcx> {
fn update_bits(
trans: &mut impl GenKill<MovePathIndex>,
path: MovePathIndex,
@ -281,7 +281,7 @@ impl<'a, 'mir, 'tcx> MaybeInitializedPlaces<'a, 'mir, 'tcx> {
}
}
impl<'a, 'tcx> MaybeUninitializedPlaces<'a, '_, 'tcx> {
impl<'tcx> MaybeUninitializedPlaces<'_, 'tcx> {
fn update_bits(
trans: &mut impl GenKill<MovePathIndex>,
path: MovePathIndex,
@ -307,7 +307,7 @@ impl<'a, 'tcx> DefinitelyInitializedPlaces<'a, 'tcx> {
}
}
impl<'tcx> AnalysisDomain<'tcx> for MaybeInitializedPlaces<'_, '_, 'tcx> {
impl<'tcx> AnalysisDomain<'tcx> for MaybeInitializedPlaces<'_, 'tcx> {
/// There can be many more `MovePathIndex` than there are locals in a MIR body.
/// We use a chunked bitset to avoid paying too high a memory footprint.
type Domain = MaybeReachable<ChunkedBitSet<MovePathIndex>>;
@ -329,7 +329,7 @@ impl<'tcx> AnalysisDomain<'tcx> for MaybeInitializedPlaces<'_, '_, 'tcx> {
}
}
impl<'tcx> GenKillAnalysis<'tcx> for MaybeInitializedPlaces<'_, '_, 'tcx> {
impl<'tcx> GenKillAnalysis<'tcx> for MaybeInitializedPlaces<'_, 'tcx> {
type Idx = MovePathIndex;
fn domain_size(&self, _: &Body<'tcx>) -> usize {
@ -442,7 +442,7 @@ impl<'tcx> GenKillAnalysis<'tcx> for MaybeInitializedPlaces<'_, '_, 'tcx> {
}
}
impl<'tcx> AnalysisDomain<'tcx> for MaybeUninitializedPlaces<'_, '_, 'tcx> {
impl<'tcx> AnalysisDomain<'tcx> for MaybeUninitializedPlaces<'_, 'tcx> {
/// There can be many more `MovePathIndex` than there are locals in a MIR body.
/// We use a chunked bitset to avoid paying too high a memory footprint.
type Domain = ChunkedBitSet<MovePathIndex>;
@ -466,7 +466,7 @@ impl<'tcx> AnalysisDomain<'tcx> for MaybeUninitializedPlaces<'_, '_, 'tcx> {
}
}
impl<'tcx> GenKillAnalysis<'tcx> for MaybeUninitializedPlaces<'_, '_, 'tcx> {
impl<'tcx> GenKillAnalysis<'tcx> for MaybeUninitializedPlaces<'_, 'tcx> {
type Idx = MovePathIndex;
fn domain_size(&self, _: &Body<'tcx>) -> usize {
@ -643,7 +643,7 @@ impl<'tcx> GenKillAnalysis<'tcx> for DefinitelyInitializedPlaces<'_, 'tcx> {
}
}
impl<'tcx> AnalysisDomain<'tcx> for EverInitializedPlaces<'_, '_, 'tcx> {
impl<'tcx> AnalysisDomain<'tcx> for EverInitializedPlaces<'_, 'tcx> {
/// There can be many more `InitIndex` than there are locals in a MIR body.
/// We use a chunked bitset to avoid paying too high a memory footprint.
type Domain = ChunkedBitSet<InitIndex>;
@ -662,7 +662,7 @@ impl<'tcx> AnalysisDomain<'tcx> for EverInitializedPlaces<'_, '_, 'tcx> {
}
}
impl<'tcx> GenKillAnalysis<'tcx> for EverInitializedPlaces<'_, '_, 'tcx> {
impl<'tcx> GenKillAnalysis<'tcx> for EverInitializedPlaces<'_, 'tcx> {
type Idx = InitIndex;
fn domain_size(&self, _: &Body<'tcx>) -> usize {