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Remove an unneeded local variable.

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`body` is already a `&Body`.
This commit is contained in:
Nicholas Nethercote 2023-11-23 16:46:44 +11:00
parent f450bf49c0
commit e4fc5df7cc
1 changed files with 9 additions and 11 deletions
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20
compiler/rustc_mir_transform/src/coroutine.rs
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@ -651,36 +651,34 @@ fn locals_live_across_suspend_points<'tcx>(
always_live_locals: &BitSet<Local>,
movable: bool,
) -> LivenessInfo {
let body_ref: &Body<'_> = body;
// Calculate when MIR locals have live storage. This gives us an upper bound of their
// lifetimes.
let mut storage_live = MaybeStorageLive::new(std::borrow::Cow::Borrowed(always_live_locals))
.into_engine(tcx, body_ref)
.into_engine(tcx, body)
.iterate_to_fixpoint()
.into_results_cursor(body_ref);
.into_results_cursor(body);
// Calculate the MIR locals which have been previously
// borrowed (even if they are still active).
let borrowed_locals_results =
MaybeBorrowedLocals.into_engine(tcx, body_ref).pass_name("coroutine").iterate_to_fixpoint();
MaybeBorrowedLocals.into_engine(tcx, body).pass_name("coroutine").iterate_to_fixpoint();
let mut borrowed_locals_cursor = borrowed_locals_results.cloned_results_cursor(body_ref);
let mut borrowed_locals_cursor = borrowed_locals_results.cloned_results_cursor(body);
// Calculate the MIR locals that we actually need to keep storage around
// for.
let mut requires_storage_results =
MaybeRequiresStorage::new(borrowed_locals_results.cloned_results_cursor(body))
.into_engine(tcx, body_ref)
.into_engine(tcx, body)
.iterate_to_fixpoint();
let mut requires_storage_cursor = requires_storage_results.as_results_cursor(body_ref);
let mut requires_storage_cursor = requires_storage_results.as_results_cursor(body);
// Calculate the liveness of MIR locals ignoring borrows.
let mut liveness = MaybeLiveLocals
.into_engine(tcx, body_ref)
.into_engine(tcx, body)
.pass_name("coroutine")
.iterate_to_fixpoint()
.into_results_cursor(body_ref);
.into_results_cursor(body);
let mut storage_liveness_map = IndexVec::from_elem(None, &body.basic_blocks);
let mut live_locals_at_suspension_points = Vec::new();
@ -746,7 +744,7 @@ fn locals_live_across_suspend_points<'tcx>(
.collect();
let storage_conflicts = compute_storage_conflicts(
body_ref,
body,
&saved_locals,
always_live_locals.clone(),
requires_storage_results,