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// Check that niche selection prefers zero and that jumps are optimized away.
// See https://github.com/rust-lang/rust/pull/87794
//@ assembly-output: emit-asm
//@ only-x86
//@ compile-flags: -Copt-level=3
#![crate_type = "lib"]
#[repr(u8)]
pub enum Size {
One = 1,
Two = 2,
Three = 3,
}
#[no_mangle]
pub fn handle(x: Option<Size>) -> u8 {
match x {
None => 0,
Some(size) => size as u8,
}
}
// There should be no jumps in output
// CHECK-NOT: j
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