[clang] [clang][analyzer] Less redundant warnings from FixedAddressChecker (PR #110458)

[Donát Nagy via cfe-commits]

================
@@ -43,6 +43,12 @@ void FixedAddressChecker::checkPreStmt(const BinaryOperator *B,
   if (!T->isPointerType())
     return;
 
+  // Omit warning if the RHS has already pointer type.
+  // The value may come from a variable and is candidate for a previous warning
+  // from the checker.
----------------
NagyDonat wrote:

```suggestion
  // Omit warning if the RHS has already pointer type. Without this passing
  // around one fixed value in several pointer variables would produce several
  // redundant warnings.
```

https://github.com/llvm/llvm-project/pull/110458