[llvm] [Attributor] Propagate alignment through ptrmask (PR #150158)

[Matt Arsenault via llvm-commits]

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@@ -5339,6 +5339,17 @@ struct AAPotentialConstantValues
     return nullptr;
   }
 
+  /// Return the minimum trailing zeros of potential constants
+  unsigned getAssumedMinTrailingZeros() const {
+    if (getAssumedSet().empty())
+      return 0;
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arsenm wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/150158