163c059354
With `feature(never_type)`, it's not guaranteed that any variable with type `!` isn't ever assigned to.
44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
// compile-flags: -Z identify_regions
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// Tests to make sure we correctly generate falseUnwind edges in loops
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fn main() {
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// Exit early at runtime. Since only care about the generated MIR
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// and not the runtime behavior (which is exercised by other tests)
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// we just bail early. Without this the test just loops infinitely.
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if true {
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return;
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}
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loop {
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let x = 1;
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continue;
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}
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}
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// END RUST SOURCE
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// START rustc.main.SimplifyCfg-qualify-consts.after.mir
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// ...
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// bb1 (cleanup): {
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// resume;
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// }
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// ...
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// bb3: { // Entry into the loop
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// _1 = ();
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// StorageDead(_2);
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// StorageDead(_1);
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// StorageLive(_4);
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// goto -> bb5;
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// }
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// ...
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// bb5: { // The loop_block
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// falseUnwind -> [real: bb6, cleanup: bb1];
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// }
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// bb6: { // The loop body (body_block)
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// StorageLive(_6);
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// _6 = const 1i32;
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// FakeRead(ForLet, _6);
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// StorageDead(_6);
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// goto -> bb5;
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// }
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// ...
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// END rustc.main.SimplifyCfg-qualify-consts.after.mir
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