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

[Florian Hahn via llvm-commits]

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@@ -94,6 +94,8 @@ bool isHeaderMask(const VPValue *V, VPlan &Plan);
 /// VPDerivedIV or VPCanonicalIVPHI).
 bool isUniformAcrossVFsAndUFs(VPValue *V);
 
+/// Returns the header block of the top-level vector loop, if one exists.
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fhahn wrote:

Updated thanks

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