[llvm] [VPlan] Hook IR blocks into VPlan during skeleton creation (NFC) (PR #114292)

[Florian Hahn via llvm-commits]

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@@ -3942,12 +3928,9 @@ class VPlan {
 #endif
 
   /// Returns the VPRegionBlock of the vector loop.
-  VPRegionBlock *getVectorLoopRegion() {
-    return cast<VPRegionBlock>(getEntry()->getSingleSuccessor());
-  }
-  const VPRegionBlock *getVectorLoopRegion() const {
-    return cast<VPRegionBlock>(getEntry()->getSingleSuccessor());
-  }
+  VPRegionBlock *getVectorLoopRegion();
+
+  const VPRegionBlock *getVectorLoopRegion() const;
 
   /// Returns the preheader of the vector loop region.
   VPBasicBlock *getVectorPreheader() {
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fhahn wrote:

Done in 30af6fb163add17a6be515200881afdff91d213a

https://github.com/llvm/llvm-project/pull/114292