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//@ compile-flags: -Copt-level=s
//@ min-llvm-version: 19
//@ only-x86_64
// Test for #126585.
// Ensure that this IR doesn't have extra undef phi input, which also guarantees that this asm
// doesn't have subsequent labels and unnecessary `jmp` instructions.
#![crate_type = "lib"]
#[no_mangle]
fn checked_div_round(a: u64, b: u64) -> Option<u64> {
// CHECK-LABEL: @checked_div_round
// CHECK: phi
// CHECK-NOT: undef
// CHECK: phi
// CHECK-NOT: undef
match b {
0 => None,
1 => Some(a),
// `a / b` is computable and `(a % b) * 2` can not overflow since `b >= 2`.
b => Some(a / b + if (a % b) * 2 >= b { 1 } else { 0 }),
}
}
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