[llvm] [VPlan] Extend licm to hoist replicate loads (PR #179506)

[Andrei Elovikov via llvm-commits]

================
@@ -288,16 +290,14 @@ collectGroupedReplicateMemOps(
   return Groups;
 }
 
-/// Return true if we do not know how to (mechanically) hoist or sink \p R out
-/// of a loop region.
+/// Return true if we do not know how to (mechanically) hoist or sink a
+/// non-memory recipe \p R out of a loop region.
----------------
eas wrote:

```suggestion
/// Return true if we do not know how to (mechanically) hoist or sink a
/// \p R out of a loop region. This return false for memory recipes, use the
/// other overload if you need more precise analysis.
```

would be clearer, IMO. Up to you though.

https://github.com/llvm/llvm-project/pull/179506