[compiler-rt] [libcxxabi] [libunwind] [runtimes][PAC] Harden unwinding when possible (#138571) (PR #143230)

[Daniil Kovalev via llvm-commits]

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@@ -541,7 +554,33 @@ struct scan_results
 };
 
 }  // unnamed namespace
+}
 
+namespace {
+// The logical model for casting authenticated function pointers makes
+// it impossible to directly cast them without breaking the authentication,
+// as a result we need this pair of helpers.
+template <typename PtrType>
+void set_landing_pad_as_ptr(scan_results& results, const PtrType& out) {
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kovdan01 wrote:

`PtrType` seems to always be a ... pointer type :) So, probably, you can just pass by value instead of using const l-value reference.

https://github.com/llvm/llvm-project/pull/143230