[llvm] [VPlan] Move predication to VPlanTransform (NFC). (PR #128420)

[via llvm-commits]

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@@ -196,38 +180,10 @@ class VPRecipeBuilder {
     Ingredient2Recipe[I] = R;
   }
 
-  /// Create the mask for the vector loop header block.
-  void createHeaderMask();
-
-  /// A helper function that computes the predicate of the block BB, assuming
-  /// that the header block of the loop is set to True or the loop mask when
-  /// tail folding.
-  void createBlockInMask(const VPBasicBlock *VPBB) {
-    return createBlockInMask(VPB2IRBB.lookup(VPBB));
-  }
-  void createBlockInMask(BasicBlock *BB);
-
-  /// Returns the *entry* mask for the block \p VPBB.
-  VPValue *getBlockInMask(const VPBasicBlock *VPBB) const {
-    return getBlockInMask(VPB2IRBB.lookup(VPBB));
-  }
-
   /// Returns the *entry* mask for the block \p BB.
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ayalz wrote:

```suggestion
  /// Returns the *entry* mask for block \p VPBB or null if the mask is full.
```

https://github.com/llvm/llvm-project/pull/128420