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

[Shilei Tian via llvm-commits]

================
@@ -5187,6 +5187,33 @@ struct AADereferenceableCallSiteReturned final
 // ------------------------ Align Argument Attribute ------------------------
 
 namespace {
+
+Align getAssumedAlignForIntrinsic(Attributor &A, AAAlign &QueryingAA,
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shiltian wrote:

```suggestion
static Align getAssumedAlignForIntrinsic(Attributor &A, AAAlign &QueryingAA,
```

In fact, the latest code standard recommends using anonymous namespace as small as possible, and use `static` on internal functions instead, but that would be in a follow-up.

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