[clang] [LifetimeSafety] Flow origins from lifetimebound args in `gsl::Pointer` construction (PR #189907)

[via cfe-commits]

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@@ -704,10 +704,10 @@ void FactsGenerator::handleFunctionCall(const Expr *Call,
         assert(!Args[I]->isGLValue() || ArgList->getLength() >= 2);
         ArgList = getRValueOrigins(Args[I], ArgList);
       }
-      if (isGslOwnerType(Args[I]->getType())) {
-        // The constructed gsl::Pointer borrows from the Owner's storage, not
-        // from what the Owner itself borrows, so only the outermost origin is
-        // needed.
+      if (isGslOwnerType(Args[I]->getType()) || IsArgLifetimeBound(I)) {
+        // The constructed gsl::Pointer is dependent on the argument itself, not
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NeKon69 wrote:

I just enabled `llvm::DebugFlag` and it dumps AST, CFG and flow facts. So that is fine.

About your other test now, I think it doesn't print any warnings because it falls under [a different case](https://github.com/llvm/llvm-project/blob/ab4b689258c21c5e47d1a865b8b980e01395aac7/clang/lib/Analysis/LifetimeSafety/FactsGenerator.cpp#L575-L683) in

```cpp
void FactsGenerator::handleGSLPointerConstruction(const CXXConstructExpr *CCE)
```

and it doesn't flow there. But I can't use `flow` there because the origin lengths are different.

https://github.com/llvm/llvm-project/pull/189907