[llvm] [InferAlignment] Increase alignment in masked load / store instrinsics if known (PR #156057)

[Simon Pilgrim via llvm-commits]

================
@@ -35,8 +36,38 @@ static bool tryToImproveAlign(
       return true;
     }
   }
-  // TODO: Also handle memory intrinsics.
-  return false;
+
+  IntrinsicInst *II = dyn_cast<IntrinsicInst>(I);
----------------
RKSimon wrote:

(style) `auto *II = dyn_cast<IntrinsicInst>(I);`

https://github.com/llvm/llvm-project/pull/156057