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

[Alexander Richardson via llvm-commits]

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@@ -343,13 +345,17 @@ class DataLayout {
 
   /// Return the address spaces containing non-integral pointers.  Pointers in
   /// this address space don't have a well-defined bitwise representation.
-  ArrayRef<unsigned> getNonIntegralAddressSpaces() const {
-    return NonIntegralAddressSpaces;
+  SmallVector<unsigned, 8> getNonIntegralAddressSpaces() const {
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arichardson wrote:

It is only used in tests - I could drop those if you prefer?

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