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

[Matt Arsenault via llvm-commits]

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@@ -5188,6 +5188,83 @@ struct AADereferenceableCallSiteReturned final
 // ------------------------ Align Argument Attribute ------------------------
 
 namespace {
+
+static std::optional<uint64_t>
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arsenm wrote:

You should keep this operating with Align instead of optional<uint64_t> 

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