[clang] [LifetimeSafety] Report the alias chain for returned stack memory (PR #226395)

[Utkarsh Saxena via cfe-commits]

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@@ -3887,27 +3887,27 @@ namespace GH191954 {
     int x;
     int* f = &x; // expected-warning {{stack memory associated with local variable 'x' is returned}}
     int* a;
-    a = std::move(f);
+    a = std::move(f); // expected-note {{result of call to 'move<int *&>' aliases the storage of local variable 'x'}}
     return a; // expected-note {{returned here}}
   }
 
   int* return_moved_pointer2() {
     int x;
     int* f = &x;         // expected-warning {{stack memory associated with local variable 'x' is returned}}
-    return std::move(f); // expected-note {{returned here}}
+    return std::move(f); // expected-note {{returned here}} expected-note {{result of call to 'move<int *&>' aliases the storage of local variable 'x'}}
----------------
usx95 wrote:

nit: We have been using ` \` to split the assertions across multiple line.
```cpp
return std::move(f); // expected-note {{returned here}} \
                     // expected-note {{result of call to 'move<int *&>' aliases the storage of local variable 'x'}}
```
Same for all the tests.

https://github.com/llvm/llvm-project/pull/226395