[clang] [llvm] [ARM][AArch64] BTI, GCS, PAC Module flag update. (PR #86212)

[Daniil Kovalev via cfe-commits]

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@@ -89,6 +89,9 @@ namespace llvm {
   /// info. Return true if module is modified.
   bool UpgradeDebugInfo(Module &M);
 
+  /// Copies module attributes to the functions in the module.
+  void CopyModuleAttrToFunctions(Module &M);
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kovdan01 wrote:

Nit: it's probably worth having a more detailed comment here. For example, to explicitly say that this function will only have effect on thumb, arm and aarch64 (on other architectures, it just returns at the very beginning) and list attributes which are taken into account.

https://github.com/llvm/llvm-project/pull/86212