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Convert manual loop into while let

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This commit is contained in:
Nilstrieb 2023-04-09 23:08:01 +02:00
parent 4b4948c2e3
commit e5defd0102
1 changed files with 1 additions and 11 deletions
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12
compiler/rustc_middle/src/mir/traversal.rs
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@ -178,17 +178,7 @@ impl<'a, 'tcx> Postorder<'a, 'tcx> {
// When we yield `B` and call `traverse_successor`, we push `C` to the stack, but // When we yield `B` and call `traverse_successor`, we push `C` to the stack, but
// since we've already visited `E`, that child isn't added to the stack. The last // since we've already visited `E`, that child isn't added to the stack. The last
// two iterations yield `C` and finally `A` for a final traversal of [E, D, B, C, A] // two iterations yield `C` and finally `A` for a final traversal of [E, D, B, C, A]
loop { while let Some(&mut (_, ref mut iter)) = self.visit_stack.last_mut() && let Some(bb) = iter.next() {
let bb = if let Some(&mut (_, ref mut iter)) = self.visit_stack.last_mut() {
if let Some(bb) = iter.next() {
bb
} else {
break;
}
} else {
break;
};
if self.visited.insert(bb) { if self.visited.insert(bb) {
if let Some(term) = &self.basic_blocks[bb].terminator { if let Some(term) = &self.basic_blocks[bb].terminator {
self.visit_stack.push((bb, term.successors())); self.visit_stack.push((bb, term.successors()));