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Doc-comment IndexVec::from_elem and use it in a few more places

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Scott McMurray
2023-04-03 14:22:09 -07:00
parent bf41e753ec
commit 5c3e5af2ed
5 changed files with 17 additions and 7 deletions
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5
compiler/rustc_mir_transform/src/coverage/graph.rs
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@@ -37,8 +37,7 @@ impl CoverageGraph {
// `SwitchInt` to have multiple targets to the same destination `BasicBlock`, so
// de-duplication is required. This is done without reordering the successors.
let bcbs_len = bcbs.len();
let mut seen = IndexVec::from_elem_n(false, bcbs_len);
let mut seen = IndexVec::from_elem(false, &bcbs);
let successors = IndexVec::from_fn_n(
|bcb| {
for b in seen.iter_mut() {
@@ -60,7 +59,7 @@ impl CoverageGraph {
bcbs.len(),
);
let mut predecessors = IndexVec::from_elem_n(Vec::new(), bcbs.len());
let mut predecessors = IndexVec::from_elem(Vec::new(), &bcbs);
for (bcb, bcb_successors) in successors.iter_enumerated() {
for &successor in bcb_successors {
predecessors[successor].push(bcb);