1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
//@ assembly-output: emit-asm
//@ only-x86_64
//@ ignore-sgx
//@ revisions: opt-speed opt-size
//@ [opt-speed] compile-flags: -Copt-level=2 -Cdebug-assertions=no
//@ [opt-size] compile-flags: -Copt-level=s -Cdebug-assertions=no
#![crate_type = "rlib"]
#![feature(core_intrinsics)]
#![feature(pointer_is_aligned_to)]
// CHECK-LABEL: is_aligned_to_unchecked
// CHECK: decq
// CHECK-NEXT: testq
// CHECK-NEXT: sete
// CHECK: retq
#[no_mangle]
pub unsafe fn is_aligned_to_unchecked(ptr: *const u8, align: usize) -> bool {
unsafe { std::intrinsics::assume(align.is_power_of_two()) }
ptr.is_aligned_to(align)
}
// CHECK-LABEL: is_aligned_1
// CHECK: movb $1
// CHECK: retq
#[no_mangle]
pub fn is_aligned_1(ptr: *const u8) -> bool {
ptr.is_aligned()
}
// CHECK-LABEL: is_aligned_2
// CHECK: testb $1
// CHECK-NEXT: sete
// CHECK: retq
#[no_mangle]
pub fn is_aligned_2(ptr: *const u16) -> bool {
ptr.is_aligned()
}
// CHECK-LABEL: is_aligned_4
// CHECK: testb $3
// CHECK-NEXT: sete
// CHECK: retq
#[no_mangle]
pub fn is_aligned_4(ptr: *const u32) -> bool {
ptr.is_aligned()
}
// CHECK-LABEL: is_aligned_8
// CHECK: testb $7
// CHECK-NEXT: sete
// CHECK: retq
#[no_mangle]
pub fn is_aligned_8(ptr: *const u64) -> bool {
ptr.is_aligned()
}
|
