2023-10-06 03:17:09 -05:00
|
|
|
// assembly-output: emit-asm
|
|
|
|
|
// compile-flags: --crate-type=lib -O -C llvm-args=-x86-asm-syntax=intel
|
|
|
|
|
// only-x86_64
|
|
|
|
|
// ignore-sgx
|
2023-10-12 13:03:02 -05:00
|
|
|
// ignore-macos (manipulates rsp too)
|
2023-10-06 03:17:09 -05:00
|
|
|
|
|
|
|
|
// Depending on various codegen choices, this might end up copying
|
|
|
|
|
// a `<2 x i8>`, an `i16`, or two `i8`s.
|
|
|
|
|
// Regardless of those choices, make sure the instructions use (2-byte) words.
|
|
|
|
|
|
|
|
|
|
// CHECK-LABEL: array_copy_2_elements:
|
|
|
|
|
#[no_mangle]
|
|
|
|
|
pub fn array_copy_2_elements(a: &[u8; 2], p: &mut [u8; 2]) {
|
|
|
|
|
// CHECK-NOT: byte
|
|
|
|
|
// CHECK-NOT: mov
|
|
|
|
|
// CHECK: mov{{.+}}, word ptr
|
|
|
|
|
// CHECK-NEXT: mov word ptr
|
|
|
|
|
// CHECK-NEXT: ret
|
|
|
|
|
*p = *a;
|
|
|
|
|
}
|
