rust/tests/mir-opt/building/custom/arbitrary_let.rs

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#![feature(custom_mir, core_intrinsics)]
extern crate core;
use core::intrinsics::mir::*;
use core::ptr::{addr_of, addr_of_mut};
// EMIT_MIR arbitrary_let.arbitrary_let.built.after.mir
#[custom_mir(dialect = "built")]
fn arbitrary_let(x: i32) -> i32 {
mir!(
{
let y = x;
Goto(second)
}
third = {
RET = z;
Return()
}
second = {
let z = y;
Goto(third)
}
)
}
fn main() {
assert_eq!(arbitrary_let(5), 5);
}