bbf60c897e
Simplify match based on the cast result of `IntToInt` Continue to complete #124150. The condition in #120614 is wrong, e.g. `-1i8` cannot be converted to `255i16`. I've rethought the issue and simplified the conditional judgment for a more straightforward approach. The new approach is to check **if the case value after the `IntToInt` conversion equals the target value**. In different types, `IntToInt` uses different casting methods. This rule is as follows: - `i8`/`u8` to `i8`/`u8`: do nothing. - `i8` to `i16`/`u16`: sign extension. - `u8` to `i16`/`u16`: zero extension. - `i16`/`u16` to `i8`/`u8`: truncate to the target size. The previous error was a mix of zext and sext. r? mir-opt |
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This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
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