Rollup merge of #72941 - nagisa:ensure-stack-for-match, r=oli-obk
Ensure stack when building MIR for matches In particular matching on complex types such as strings will cause deep recursion to happen. Fixes #72933 r? @matthewjasper @oli-obk
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adc92becf0
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@ -10,7 +10,7 @@ use crate::build::ForGuard::{self, OutsideGuard, RefWithinGuard};
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use crate::build::{BlockAnd, BlockAndExtension, Builder};
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use crate::build::{GuardFrame, GuardFrameLocal, LocalsForNode};
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use crate::hair::{self, *};
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use rustc_data_structures::fx::{FxHashMap, FxHashSet};
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use rustc_data_structures::{fx::{FxHashMap, FxHashSet}, stack::ensure_sufficient_stack};
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use rustc_hir::HirId;
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use rustc_index::bit_set::BitSet;
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use rustc_middle::middle::region;
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@ -909,30 +909,32 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
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split_or_candidate |= self.simplify_candidate(candidate);
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}
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if split_or_candidate {
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// At least one of the candidates has been split into subcandidates.
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// We need to change the candidate list to include those.
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let mut new_candidates = Vec::new();
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ensure_sufficient_stack(|| {
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if split_or_candidate {
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// At least one of the candidates has been split into subcandidates.
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// We need to change the candidate list to include those.
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let mut new_candidates = Vec::new();
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for candidate in candidates {
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candidate.visit_leaves(|leaf_candidate| new_candidates.push(leaf_candidate));
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for candidate in candidates {
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candidate.visit_leaves(|leaf_candidate| new_candidates.push(leaf_candidate));
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}
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self.match_simplified_candidates(
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span,
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start_block,
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otherwise_block,
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&mut *new_candidates,
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fake_borrows,
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);
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} else {
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self.match_simplified_candidates(
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span,
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start_block,
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otherwise_block,
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candidates,
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fake_borrows,
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);
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}
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self.match_simplified_candidates(
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span,
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start_block,
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otherwise_block,
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&mut *new_candidates,
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fake_borrows,
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);
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} else {
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self.match_simplified_candidates(
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span,
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start_block,
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otherwise_block,
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candidates,
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fake_borrows,
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);
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};
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});
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}
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fn match_simplified_candidates(
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