[clang] [LifetimeSafety] Infer [[clang::lifetimebound]] annotation (PR #171081)

[Utkarsh Saxena via cfe-commits]

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@@ -552,6 +552,20 @@ const int& get_ref_to_local() {
                       // expected-note at -1 {{returned here}}
 }
 
+View inference_callee_return_identity(View a) {
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usx95 wrote:

```cpp
namespace inference_in_order_with_redecls {
View inference_callee_return_identity(View a);
View inference_callee_return_identity(View a) {
  return a;
}

View inference_caller_forwards_callee(View a);
View inference_caller_forwards_callee(View a) {
  return inference_callee_return_identity(a);
}
  
View inference_top_level_return_stack_view() {
  MyObj local_stack;
  return inference_caller_forwards_callee(local_stack);     // expected-warning {{address of stack memory is returned later}}
                                                            // expected-note at -1 {{returned here}}
}
} // namespace inference_in_order_with_redecls
```

https://github.com/llvm/llvm-project/pull/171081