[llvm] [LV] Stability fix for outerloop vectorization (PR #68118)

[Florian Hahn via llvm-commits]

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@@ -156,6 +156,19 @@ 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 isNestedLoop(const Loop *L, const Loop *OuterLoop) {
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fhahn wrote:

nit: might be better to call it something like `doesContainLoop`, more in line with the comment.

https://github.com/llvm/llvm-project/pull/68118