48 lines
1.1 KiB
Rust
48 lines
1.1 KiB
Rust
|
//@ assembly-output: emit-asm
|
||
|
|
//@ compile-flags: -Copt-level=1
|
||
|
|
//@ only-x86_64
|
||
|
|
#![crate_type="rlib"]
|
||
|
|
|
||
|
|
// CHECK-LABEL: align_offset_byte_ptr
|
||
|
|
// CHECK: leaq 31
|
||
|
|
// CHECK: andq $-32
|
||
|
|
// CHECK: subq
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn align_offset_byte_ptr(ptr: *const u8) -> usize {
|
||
|
|
ptr.align_offset(32)
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: align_offset_byte_slice
|
||
|
|
// CHECK: leaq 31
|
||
|
|
// CHECK: andq $-32
|
||
|
|
// CHECK: subq
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn align_offset_byte_slice(slice: &[u8]) -> usize {
|
||
|
|
slice.as_ptr().align_offset(32)
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: align_offset_word_ptr
|
||
|
|
// CHECK: leaq 31
|
||
|
|
// CHECK: andq $-32
|
||
|
|
// CHECK: subq
|
||
|
|
// CHECK: shrq
|
||
|
|
// This `ptr` is not known to be aligned, so it is required to check if it is at all possible to
|
||
|
|
// align. LLVM applies a simple mask.
|
||
|
|
// CHECK: orq
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn align_offset_word_ptr(ptr: *const u32) -> usize {
|
||
|
|
ptr.align_offset(32)
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: align_offset_word_slice
|
||
|
|
// CHECK: leaq 31
|
||
|
|
// CHECK: andq $-32
|
||
|
|
// CHECK: subq
|
||
|
|
// CHECK: shrq
|
||
|
|
// `slice` is known to be aligned, so `!0` is not possible as a return
|
||
|
|
// CHECK-NOT: orq
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn align_offset_word_slice(slice: &[u32]) -> usize {
|
||
|
|
slice.as_ptr().align_offset(32)
|
||
|
|
}
|