| // 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(option_as_slice)] |
| |
| extern crate core; |
| |
| use core::num::NonZeroU64; |
| 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<NonZeroU64>) -> &[NonZeroU64] { |
| // 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() |
| } |
