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[win][arm64] Disable MSVC Linker 'Arm Hazard' warning

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This commit is contained in:
Daniel Paoliello 2025-05-07 10:56:00 -07:00
parent f5d3fe273b
commit 75ca6c621e
1 changed files with 6 additions and 1 deletions
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7
compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs
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@ -1,10 +1,15 @@
use crate::spec::{Target, TargetMetadata, base};
use crate::spec::{LinkerFlavor, Lld, Target, TargetMetadata, base};
pub(crate) fn target() -> Target {
let mut base = base::windows_msvc::opts();
base.max_atomic_width = Some(128);
base.features = "+v8a,+neon,+fp-armv8".into();
// MSVC emits a warning about code that may trip "Cortex-A53 MPCore processor bug #843419" (see
// https://developer.arm.com/documentation/epm048406/latest) which is sometimes emitted by LLVM.
// Since Arm64 Windows 10+ isn't supported on that processor, it's safe to disable the warning.
base.add_pre_link_args(LinkerFlavor::Msvc(Lld::No), &["/arm64hazardfree"]);
Target {
llvm_target: "aarch64-pc-windows-msvc".into(),
metadata: TargetMetadata {