9d999bb035
`for_each_assignment_mut` can skip assignment statements with side effects, which can result in some assignment statements retrieving outdated value. For example, it may skip a dereference assignment statement.
26 lines
581 B
Diff
26 lines
581 B
Diff
- // MIR for `hello` before GVN
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+ // MIR for `hello` after GVN
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fn hello() -> () {
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let mut _0: ();
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let mut _1: bool;
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let mut _2: !;
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bb0: {
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StorageLive(_1);
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- _1 = const <bool as NeedsDrop>::NEEDS;
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- switchInt(move _1) -> [0: bb2, otherwise: bb1];
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+ _1 = const false;
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+ switchInt(const false) -> [0: bb2, otherwise: bb1];
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}
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bb1: {
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_2 = begin_panic::<&str>(const "explicit panic") -> unwind continue;
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}
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bb2: {
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StorageDead(_1);
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return;
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}
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}
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