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Fix miscompile in SimplifyBranchSame

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Simon Vandel Sillesen 2020-10-04 00:00:00 +00:00 committed by Tomasz Miąsko
parent 4ccf5f731b
commit 80d5017a6e
1 changed files with 2 additions and 1 deletions
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compiler/rustc_mir/src/transform/simplify_try.rs
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@ -630,7 +630,8 @@ impl<'a, 'tcx> SimplifyBranchSameOptimizationFinder<'a, 'tcx> {
// All successor basic blocks must be equal or contain statements that are pairwise considered equal.
for ((target_and_value_l,bb_l), (target_and_value_r,bb_r)) in iter_bbs_reachable.tuple_windows() {
let trivial_checks = bb_l.is_cleanup == bb_r.is_cleanup
&& bb_l.terminator().kind == bb_r.terminator().kind;
&& bb_l.terminator().kind == bb_r.terminator().kind
&& bb_l.statements.len() == bb_r.statements.len();
let statement_check = || {
bb_l.statements.iter().zip(&bb_r.statements).try_fold(StatementEquality::TrivialEqual, |acc,(l,r)| {
let stmt_equality = self.statement_equality(*adt_matched_on, &l, target_and_value_l, &r, target_and_value_r);