mirror of
https://github.com/rust-lang/rust
synced 2024-10-02 06:44:33 +00:00
18 lines
415 B
Rust
18 lines
415 B
Rust
// compile-flags: -O -Zmir-opt-level=2 -Cdebuginfo=0
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// ignore-debug: standard library debug assertions add a panic that breaks this optimization
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#![crate_type = "lib"]
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pub enum Thing {
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A,
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B,
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}
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// EMIT_MIR duplicate_switch_targets.ub_if_b.PreCodegen.after.mir
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pub unsafe fn ub_if_b(t: Thing) -> Thing {
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match t {
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Thing::A => t,
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Thing::B => std::hint::unreachable_unchecked(),
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}
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}
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