Nilstrieb eafab66096 UnreachableProp: Preserve unreachable branches for multiple targets ... Before, UnreachablePropagation removed all unreachable branches. This was a pessimization, as it removed information about reachability that was used later in the optimization pipeline. For example, this code ```rust pub enum Two { A, B } pub fn identity(x: Two) -> Two { match x { Two::A => Two::A, Two::B => Two::B, } } ``` basically has `switchInt() -> [0: 0, 1: 1, otherwise: unreachable]` for the match. This allows it to be transformed into a simple `x`. If we remove the unreachable branch, the transformation becomes illegal.		2022-08-21 21:15:28 +02:00
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src	UnreachableProp: Preserve unreachable branches for multiple targets	2022-08-21 21:15:28 +02:00
Cargo.toml	Update smallvec to 1.8.1.	2022-06-27 08:48:55 +10:00