| //@ 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); |
| } |
| } |
