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