mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 01:04:03 +00:00
38 lines
921 B
Rust
38 lines
921 B
Rust
//@ compile-flags: -O -Z randomize-layout=no
|
|
//@ only-x86_64
|
|
//@ ignore-llvm-version: 16.0.0
|
|
// ^-- needs https://reviews.llvm.org/D146149 in 16.0.1
|
|
#![crate_type = "lib"]
|
|
#![feature(generic_nonzero)]
|
|
|
|
extern crate core;
|
|
|
|
use core::num::NonZero;
|
|
use core::option::Option;
|
|
|
|
// CHECK-LABEL: @u64_opt_as_slice
|
|
#[no_mangle]
|
|
pub fn u64_opt_as_slice(o: &Option<u64>) -> &[u64] {
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
o.as_slice()
|
|
}
|
|
|
|
// CHECK-LABEL: @nonzero_u64_opt_as_slice
|
|
#[no_mangle]
|
|
pub fn nonzero_u64_opt_as_slice(o: &Option<NonZero<u64>>) -> &[NonZero<u64>] {
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
// CHECK: %[[NZ:.+]] = icmp ne i64 %{{.+}}, 0
|
|
// CHECK-NEXT: zext i1 %[[NZ]] to i64
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
o.as_slice()
|
|
}
|