[llvm] [VPlan] First step towards VPlan cost modeling (LegacyCM in CostCtx) (PR #92555)

[via llvm-commits]

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@@ -2948,6 +2994,9 @@ class VPBasicBlock : public VPBlockBase {
     return NewBlock;
   }
 
+  /// Compute the cost of this VPBasicBlock
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ayalz wrote:

```suggestion
  /// Compute the cost of this VPBasicBlock.
```

https://github.com/llvm/llvm-project/pull/92555