rust/tests/mir-opt/simplify_locals_removes_unused_discriminant_reads.rs

// skip-filecheck
//@ test-mir-pass: SimplifyLocals-before-const-prop

fn map(x: Option<Box<()>>) -> Option<Box<()>> {
    match x {
        None => None,
        Some(x) => Some(x),
    }
}

fn main() {
    map(None);
}

// EMIT_MIR simplify_locals_removes_unused_discriminant_reads.map.SimplifyLocals-before-const-prop.diff
Allow to run filecheck in mir-opt tests. 2023-10-16 17:36:39 +00:00			`// skip-filecheck`
mir-opt tests: rename unit-test -> test-mir-pass 2024-04-20 11:19:34 +00:00			`//@ test-mir-pass: SimplifyLocals-before-const-prop`
Disable the SimplifyArmIdentity mir-opt The optimization still has some bugs that need to be worked out such as #77359. We can try re-enabling this again after the known issues are resolved. 2020-10-01 00:04:19 +00:00
Remove unused discriminant reads from MIR bodies Allow the `SimplifyLocals` pass to remove reads of discriminants if the read is never used. 2020-03-30 13:56:52 +00:00			`fn map(x: Option<Box<()>>) -> Option<Box<()>> {`
			`match x {`
			`None => None,`
			`Some(x) => Some(x),`
			`}`
			`}`

			`fn main() {`
			`map(None);`
			`}`

Move SimplifyLocals before ConstProp. 2022-12-04 19:20:55 +00:00			`// EMIT_MIR simplify_locals_removes_unused_discriminant_reads.map.SimplifyLocals-before-const-prop.diff`