[clang] Adding use-after-return in Lifetime Analysis (PR #165370)

[Utkarsh Saxena via cfe-commits]

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@@ -10730,6 +10730,7 @@ def warn_lifetime_safety_loan_expires_strict : Warning<
    InGroup<LifetimeSafetyStrict>, DefaultIgnore;
 def note_lifetime_safety_used_here : Note<"later used here">;
 def note_lifetime_safety_destroyed_here : Note<"destroyed here">;
+def note_lifetime_safety_returned_here : Note<"returned here">;
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usx95 wrote:

We can have a separate warning for this.
def warn_lifetime_safety_return_stack_addr_permissive: "reference to stack address maybe returned later".
def warn_lifetime_safety_return_stack_addr_strict: "reference to stack address is returned later".


https://github.com/llvm/llvm-project/pull/165370