rust/tests/codegen/issue-73031.rs

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// compile-flags: -O
#![crate_type = "lib"]
// Test that LLVM can eliminate the unreachable `All::None` branch.
pub enum All {
None,
Foo,
Bar,
}
// CHECK-LABEL: @issue_73031
#[no_mangle]
pub fn issue_73031(a: &mut All, q: i32) -> i32 {
*a = if q == 5 {
All::Foo
} else {
All::Bar
};
match *a {
// CHECK-NOT: panic
All::None => panic!(),
All::Foo => 1,
All::Bar => 2,
}
}