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Tweak block management

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This commit is contained in:
Nadrieril 2024-02-18 12:52:40 +01:00
parent 7168c13579
commit 780beda83c
1 changed files with 11 additions and 13 deletions
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24
compiler/rustc_mir_build/src/build/matches/mod.rs
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@ -1408,7 +1408,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
span: Span,
scrutinee_span: Span,
candidates: &mut [&mut Candidate<'_, 'tcx>],
block: BasicBlock,
start_block: BasicBlock,
otherwise_block: BasicBlock,
fake_borrows: &mut Option<FxIndexSet<Place<'tcx>>>,
) {
@ -1423,7 +1423,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
span,
scrutinee_span,
candidates,
block,
start_block,
otherwise_block,
fake_borrows,
);
@ -1432,7 +1432,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}
let match_pairs = mem::take(&mut first_candidate.match_pairs);
first_candidate.pre_binding_block = Some(block);
let remainder_start = self.cfg.start_new_block();
for match_pair in match_pairs {
@ -1442,9 +1441,12 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
let or_span = match_pair.pattern.span;
first_candidate.visit_leaves(|leaf_candidate| {
let or_start = leaf_candidate.pre_binding_block.unwrap_or(start_block);
let or_otherwise = leaf_candidate.otherwise_block.unwrap_or(remainder_start);
self.test_or_pattern(
leaf_candidate,
remainder_start,
or_start,
or_otherwise,
pats,
or_span,
&match_pair.place,
@ -1464,13 +1466,14 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}
#[instrument(
skip(self, otherwise, or_span, place, fake_borrows, candidate, pats),
skip(self, start_block, otherwise_block, or_span, place, fake_borrows, candidate, pats),
level = "debug"
)]
fn test_or_pattern<'pat>(
&mut self,
candidate: &mut Candidate<'pat, 'tcx>,
otherwise: BasicBlock,
start_block: BasicBlock,
otherwise_block: BasicBlock,
pats: &'pat [Box<Pat<'tcx>>],
or_span: Span,
place: &PlaceBuilder<'tcx>,
@ -1482,16 +1485,11 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
.map(|pat| Candidate::new(place.clone(), pat, candidate.has_guard, self))
.collect();
let mut or_candidate_refs: Vec<_> = or_candidates.iter_mut().collect();
let otherwise = if let Some(otherwise_block) = candidate.otherwise_block {
otherwise_block
} else {
otherwise
};
self.match_candidates(
or_span,
or_span,
candidate.pre_binding_block.unwrap(),
otherwise,
start_block,
otherwise_block,
&mut or_candidate_refs,
fake_borrows,
);