[llvm] VectorCombine: refactor foldShuffleToIdentity (NFC) (PR #92766)

[David Green via llvm-commits]

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@@ -1721,73 +1768,78 @@ bool VectorCombine::foldShuffleToIdentity(Instruction &I) {
 
   while (!Worklist.empty()) {
     SmallVector<InstLane> Item = Worklist.pop_back_val();
+    auto [FrontV, FrontLane] = Item.front();
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davemgreen wrote:

These two might as well be below the NumVisited check below.

https://github.com/llvm/llvm-project/pull/92766