[llvm] [VPlan] Introduce child regions as VPlan transform. (PR #129402)

[via llvm-commits]

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@@ -150,19 +118,6 @@ static bool isHeaderVPBB(VPBasicBlock *VPBB) {
   return VPBB->getParent() && VPBB->getParent()->getEntry() == VPBB;
 }
 
-/// Return true of \p L loop is contained within \p OuterLoop.
-static bool doesContainLoop(const Loop *L, const Loop *OuterLoop) {
-  if (L->getLoopDepth() < OuterLoop->getLoopDepth())
-    return false;
-  const Loop *P = L;
-  while (P) {
-    if (P == OuterLoop)
-      return true;
-    P = P->getParentLoop();
-  }
-  return false;
-}
-
 // Create a new empty VPBasicBlock for an incoming BasicBlock in the region
 // corresponding to the containing loop  or retrieve an existing one if it was
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ayalz wrote:

The region/loop part deserves updating/removal.

https://github.com/llvm/llvm-project/pull/129402