Auto merge of #88354 - Jmc18134:hint-space-pauth-opt, r=nagisa

Add codegen option for branch protection and pointer authentication on AArch64

The branch-protection codegen option enables the use of hint-space pointer
authentication code for AArch64 targets.

compiler/rustc_codegen_llvm/src/declare.rs

@@ -47,6 +47,7 @@ fn declare_raw_fn<'ll>(
 
     attributes::default_optimisation_attrs(cx.tcx.sess, llfn);
     attributes::non_lazy_bind(cx.sess(), llfn);
+
     llfn
 }