rust/tests/codegen/option-nonzero-eq.rs

//@ compile-flags: -O -Zmerge-functions=disabled
#![crate_type = "lib"]
#![feature(generic_nonzero)]

extern crate core;
use core::cmp::Ordering;
use core::ptr::NonNull;
use core::num::NonZero;

// See also tests/assembly/option-nonzero-eq.rs, for cases with `assume`s in the
// LLVM and thus don't optimize down clearly here, but do in assembly.

// CHECK-lABEL: @non_zero_eq
#[no_mangle]
pub fn non_zero_eq(l: Option<NonZero<u32>>, r: Option<NonZero<u32>>) -> bool {
    // CHECK: start:
    // CHECK-NEXT: icmp eq i32
    // CHECK-NEXT: ret i1
    l == r
}

// CHECK-lABEL: @non_zero_signed_eq
#[no_mangle]
pub fn non_zero_signed_eq(l: Option<NonZero<i64>>, r: Option<NonZero<i64>>) -> bool {
    // CHECK: start:
    // CHECK-NEXT: icmp eq i64
    // CHECK-NEXT: ret i1
    l == r
}

// CHECK-lABEL: @non_null_eq
#[no_mangle]
pub fn non_null_eq(l: Option<NonNull<u8>>, r: Option<NonNull<u8>>) -> bool {
    // CHECK: start:
    // CHECK-NEXT: icmp eq ptr
    // CHECK-NEXT: ret i1
    l == r
}