mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-25 08:13:41 +00:00
72 lines
2.1 KiB
Rust
72 lines
2.1 KiB
Rust
//@ compile-flags: -O -Z randomize-layout=no
|
|
//@ only-x86_64
|
|
#![crate_type = "lib"]
|
|
|
|
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
|
|
// CHECK: %[[LEN:.+]] = load i64
|
|
// CHECK-SAME: !range ![[META_U64:[0-9]+]],
|
|
// CHECK-SAME: !noundef
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
// CHECK: %[[T0:.+]] = insertvalue { ptr, i64 } poison, ptr %{{.+}}, 0
|
|
// CHECK-NEXT: %[[T1:.+]] = insertvalue { ptr, i64 } %[[T0]], i64 %[[LEN]], 1
|
|
// CHECK-NEXT: ret { ptr, i64 } %[[T1]]
|
|
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: %[[LEN:.+]] = zext i1 %[[NZ]] to i64
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
// CHECK: %[[T0:.+]] = insertvalue { ptr, i64 } poison, ptr %o, 0
|
|
// CHECK-NEXT: %[[T1:.+]] = insertvalue { ptr, i64 } %[[T0]], i64 %[[LEN]], 1
|
|
// CHECK-NEXT: ret { ptr, i64 } %[[T1]]
|
|
o.as_slice()
|
|
}
|
|
|
|
// CHECK-LABEL: @u8_opt_as_slice
|
|
#[no_mangle]
|
|
pub fn u8_opt_as_slice(o: &Option<u8>) -> &[u8] {
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
// CHECK: %[[TAG:.+]] = load i8
|
|
// CHECK-SAME: !range ![[META_U8:[0-9]+]],
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: %[[LEN:.+]] = zext{{.*}} i8 %[[TAG]] to i64
|
|
// CHECK-NOT: select
|
|
// CHECK-NOT: br
|
|
// CHECK-NOT: switch
|
|
// CHECK-NOT: icmp
|
|
// CHECK: %[[T0:.+]] = insertvalue { ptr, i64 } poison, ptr %{{.+}}, 0
|
|
// CHECK-NEXT: %[[T1:.+]] = insertvalue { ptr, i64 } %[[T0]], i64 %[[LEN]], 1
|
|
// CHECK-NEXT: ret { ptr, i64 } %[[T1]]
|
|
o.as_slice()
|
|
}
|
|
|
|
// CHECK: ![[META_U64]] = !{i64 0, i64 2}
|
|
// CHECK: ![[META_U8]] = !{i8 0, i8 2}
|