[clang] [LifetimeSafety] Detect expiry of loans to trivially destructed types (PR #168855)

[Kashika Akhouri via cfe-commits]

================
@@ -493,6 +515,20 @@ MyObj& reference_return_of_local() {
                     // expected-note at -1 {{returned here}}
 }
 
+int* trivial_uar() {
+  int *a;
+  int b = 1;
+  a = &b;          // expected-warning {{address of stack memory is returned later}}
+  return a;        // expected-note {{returned here}}
+}
+
+S* trivial_class_uar () {
+  S *ptr;
+  S s;
+  ptr = &s;       // expected-warning {{address of stack memory is returned later}}
+  return ptr;     // expected-note {{returned here}}
+}
----------------
kashika0112 wrote:

Done. 

https://github.com/llvm/llvm-project/pull/168855