MatchBranchSimplification: optimize when switching on copy operand

2020-08-14 00:00:00 +00:00 · 2020-08-14 00:00:00 +00:00 · 60d7d28948
commit 60d7d28948
parent fd740266de
1 changed files with 1 additions and 1 deletions
--- a/src/librustc_mir/transform/match_branches.rs
+++ b/src/librustc_mir/transform/match_branches.rs
@ -16,7 +16,7 @@ impl<'tcx> MirPass<'tcx> for MatchBranchSimplification {
        'outer: for bb_idx in bbs.indices() {
            let (discr, val, switch_ty, first, second) = match bbs[bb_idx].terminator().kind {
                TerminatorKind::SwitchInt {
-                    discr: Operand::Move(ref place),
+                    discr: Operand::Copy(ref place) | Operand::Move(ref place),
                    switch_ty,
                    ref targets,
                    ref values,