[llvm] [DataLayout] Refactor storage of non-integral address spaces (PR #105734)

[Sergei Barannikov via llvm-commits]

================
@@ -78,7 +78,11 @@ class DataLayout {
     Align ABIAlign;
     Align PrefAlign;
     uint32_t IndexBitWidth;
-
+    /// Pointers in this address space don't have a well-defined bitwise
+    /// representation (e.g. may be relocated by a copying garbage collector).
+    /// Additionally, they may also be non-integral (i.e. containing additional
+    /// metadata such as bounds information/permissions).
+    bool IsNonIntegral = false;
----------------
s-barannikov wrote:

```suggestion
    bool IsNonIntegral;
```

https://github.com/llvm/llvm-project/pull/105734