38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
//@ compile-flags: -O
|
|
//@revisions: with_nontemporal without_nontemporal
|
|
//@[with_nontemporal] compile-flags: --target aarch64-unknown-linux-gnu
|
|
//@[with_nontemporal] needs-llvm-components: aarch64
|
|
//@[without_nontemporal] compile-flags: --target x86_64-unknown-linux-gnu
|
|
//@[without_nontemporal] needs-llvm-components: x86
|
|
|
|
// Ensure that we *do* emit the `!nontemporal` flag on architectures where it
|
|
// is well-behaved, but do *not* emit it on architectures where it is ill-behaved.
|
|
// For more context, see <https://github.com/rust-lang/rust/issues/114582> and
|
|
// <https://github.com/llvm/llvm-project/issues/64521>.
|
|
|
|
#![feature(no_core, lang_items, intrinsics)]
|
|
#![no_core]
|
|
#![crate_type = "lib"]
|
|
|
|
#[lang = "sized"]
|
|
pub trait Sized {}
|
|
#[lang = "copy"]
|
|
pub trait Copy {}
|
|
|
|
impl Copy for u32 {}
|
|
impl<T> Copy for *mut T {}
|
|
|
|
extern "rust-intrinsic" {
|
|
pub fn nontemporal_store<T>(ptr: *mut T, val: T);
|
|
}
|
|
|
|
#[no_mangle]
|
|
pub fn a(a: &mut u32, b: u32) {
|
|
// CHECK-LABEL: define{{.*}}void @a
|
|
// with_nontemporal: store i32 %b, ptr %a, align 4, !nontemporal
|
|
// without_nontemporal-NOT: nontemporal
|
|
unsafe {
|
|
nontemporal_store(a, b);
|
|
}
|
|
}
|