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92eb4450fa
minicore makes it much easier to add new language items to all of the existing `no_core` tests.
34 lines
1.1 KiB
Rust
34 lines
1.1 KiB
Rust
//@ add-core-stubs
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//@ compile-flags: -Copt-level=3
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//@revisions: with_nontemporal without_nontemporal
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//@[with_nontemporal] compile-flags: --target aarch64-unknown-linux-gnu
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//@[with_nontemporal] needs-llvm-components: aarch64
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//@[without_nontemporal] compile-flags: --target x86_64-unknown-linux-gnu
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//@[without_nontemporal] needs-llvm-components: x86
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// Ensure that we *do* emit the `!nontemporal` flag on architectures where it
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// is well-behaved, but do *not* emit it on architectures where it is ill-behaved.
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// For more context, see <https://github.com/rust-lang/rust/issues/114582> and
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// <https://github.com/llvm/llvm-project/issues/64521>.
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#![feature(no_core, lang_items, intrinsics)]
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#![no_core]
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#![crate_type = "lib"]
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extern crate minicore;
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use minicore::*;
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extern "rust-intrinsic" {
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pub fn nontemporal_store<T>(ptr: *mut T, val: T);
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}
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#[no_mangle]
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pub fn a(a: &mut u32, b: u32) {
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// CHECK-LABEL: define{{.*}}void @a
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// with_nontemporal: store i32 %b, ptr %a, align 4, !nontemporal
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// without_nontemporal-NOT: nontemporal
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unsafe {
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nontemporal_store(a, b);
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}
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}
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