mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-24 07:44:10 +00:00
59 lines
1.2 KiB
Rust
59 lines
1.2 KiB
Rust
// assembly-output: emit-asm
|
|
// min-llvm-version: 14.0
|
|
// only-x86_64
|
|
// revisions: opt-speed opt-size
|
|
// [opt-speed] compile-flags: -Copt-level=1
|
|
// [opt-size] compile-flags: -Copt-level=s
|
|
#![crate_type="rlib"]
|
|
|
|
#![feature(core_intrinsics)]
|
|
#![feature(pointer_is_aligned)]
|
|
|
|
// 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()
|
|
}
|