[llvm] [VPlan] Replace VPRegionBlock with explicit CFG before execute (NFCI). (PR #117506)

[Florian Hahn via llvm-commits]

================
@@ -240,6 +242,9 @@ class VPBlockUtils {
     VPBlockUtils::connectBlocks(From, BlockPtr, -1, SuccIdx);
     VPBlockUtils::connectBlocks(BlockPtr, To, PredIx, -1);
   }
+
+  /// Returns true if \p VPB is a loop header.
----------------
fhahn wrote:

Adjusted the name to `VPB` (arg is `VPBlockBase`), and update the erst, thanks

https://github.com/llvm/llvm-project/pull/117506