[llvm] [LV] Support generating masks for switch terminators. (PR #99808)

[via llvm-commits]

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@@ -134,6 +134,10 @@ class VPRecipeBuilder {
   /// Returns the *entry* mask for the block \p BB.
   VPValue *getBlockInMask(BasicBlock *BB) const;
 
+  /// Create masks for all cases with destination different than the default
+  /// destination, and a mask for the default destination.
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ayalz wrote:

```suggestion
  /// Create an edge mask for every destination of cases and/or default.
```

https://github.com/llvm/llvm-project/pull/99808