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Auto merge of #131900 - mrkajetanp:target-feature-pauth-lr, r=Amanieu

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rustc_target: Add pauth-lr aarch64 target feature

Add the pauth-lr target feature, corresponding to aarch64 FEAT_PAuth_LR. This feature has been added in LLVM 19.
It is currently not supported by the Linux hwcap and so we cannot add runtime feature detection for it at this time.

r? `@Amanieu`
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bors 2024-10-27 00:09:49 +00:00
commit f7cf41c973
4 changed files with 5 additions and 2 deletions
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compiler/rustc_codegen_llvm/src/llvm_util.rs
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@ -248,6 +248,7 @@ pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFea
("aarch64", "pmuv3") => Some(LLVMFeature::new("perfmon")),
("aarch64", "paca") => Some(LLVMFeature::new("pauth")),
("aarch64", "pacg") => Some(LLVMFeature::new("pauth")),
("aarch64", "pauth-lr") if get_version().0 < 19 => None,
// Before LLVM 20 those two features were packaged together as b16b16
("aarch64", "sve-b16b16") if get_version().0 < 20 => Some(LLVMFeature::new("b16b16")),
("aarch64", "sme-b16b16") if get_version().0 < 20 => Some(LLVMFeature::new("b16b16")),