mirror of https://github.com/rust-lang/rust
51 lines
1.4 KiB
Rust
51 lines
1.4 KiB
Rust
// skip-filecheck
|
|
//@ compile-flags: -Z mir-opt-level=3 -Zunsound-mir-opts
|
|
// EMIT_MIR simplify_arm.id.SimplifyArmIdentity.diff
|
|
// EMIT_MIR simplify_arm.id.SimplifyBranchSame.diff
|
|
// EMIT_MIR simplify_arm.id_result.SimplifyArmIdentity.diff
|
|
// EMIT_MIR simplify_arm.id_result.SimplifyBranchSame.diff
|
|
// EMIT_MIR simplify_arm.id_try.SimplifyArmIdentity.diff
|
|
// EMIT_MIR simplify_arm.id_try.SimplifyBranchSame.diff
|
|
|
|
//@ ignore-test This pass is broken since deaggregation changed
|
|
|
|
fn id(o: Option<u8>) -> Option<u8> {
|
|
match o {
|
|
Some(v) => Some(v),
|
|
None => None,
|
|
}
|
|
}
|
|
|
|
fn id_result(r: Result<u8, i32>) -> Result<u8, i32> {
|
|
match r {
|
|
Ok(x) => Ok(x),
|
|
Err(y) => Err(y),
|
|
}
|
|
}
|
|
|
|
fn into_result<T, E>(r: Result<T, E>) -> Result<T, E> {
|
|
r
|
|
}
|
|
|
|
fn from_error<T, E>(e: E) -> Result<T, E> {
|
|
Err(e)
|
|
}
|
|
|
|
// This was written to the `?` from `try_trait`, but `try_trait_v2` uses a different structure,
|
|
// so the relevant desugar is copied inline in order to keep the test testing the same thing.
|
|
// FIXME(#85133): while this might be useful for `r#try!`, it would be nice to have a MIR
|
|
// optimization that picks up the `?` desugaring, as `SimplifyArmIdentity` does not.
|
|
fn id_try(r: Result<u8, i32>) -> Result<u8, i32> {
|
|
let x = match into_result(r) {
|
|
Err(e) => return from_error(From::from(e)),
|
|
Ok(v) => v,
|
|
};
|
|
Ok(x)
|
|
}
|
|
|
|
fn main() {
|
|
id(None);
|
|
id_result(Ok(4));
|
|
id_try(Ok(4));
|
|
}
|