[clang] [llvm] [LifetimeSafety] Add lifetimebound inference for std::make_unique (PR #191632)

[Gábor Horváth via cfe-commits]

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@@ -221,6 +221,17 @@ void Sema::inferGslOwnerPointerAttribute(CXXRecordDecl *Record) {
   inferGslPointerAttribute(Record, Record);
 }
 
+static const CXXNewExpr *findCXXNewExpr(const Stmt *S) {
+  if (!S)
+    return nullptr;
+  if (const auto *E = dyn_cast<CXXNewExpr>(S))
+    return E;
+  for (const Stmt *Child : S->children())
+    if (const CXXNewExpr *E = findCXXNewExpr(Child))
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Xazax-hun wrote:

Usually, we try to avoid recursion when we can to avoid exhausting the stack but here it is probably fine since this is only used for `make_unique` that supposed to have a relatively small AST. I wonder if we should have a comment to make sure this does not get used for something else without getting rid of the recursion. 

https://github.com/llvm/llvm-project/pull/191632