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

[Matt Arsenault via llvm-commits]

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@@ -5203,6 +5203,32 @@ static unsigned getKnownAlignForUse(Attributor &A, AAAlign &QueryingAA,
       TrackUse = true;
     return 0;
   }
+  if (auto *II = dyn_cast<IntrinsicInst>(I)) {
+    if (II->getIntrinsicID() == Intrinsic::ptrmask) {
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arsenm wrote:

Can you split the intrinsic case into a separate function, and switch over the intrinsic ID 

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