[llvm] [SLP][NFC]Broader use of filter/isa ranges (PR #226535)

[Ryan Buchner via llvm-commits]

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@@ -21006,30 +20971,29 @@ BoUpSLP::isGatherShuffledSingleRegisterEntry(
     It->second = Res;
     return Res;
   };
-  for (Value *V : VL) {
-    if (isConstant(V) || !VisitedValue.insert(V).second)
-      continue;
+  for (Value *V :
+       make_filter_range(dedup(VL), [](Value *V) { return !isConstant(V); })) {
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bababuck wrote:

This will break I think. `DedupRange` will be temporary in this case in which case `Seen` will die and the iterators will have dangling pointers to `Seen`. Maybe make seen a `shared_ptr`?

https://github.com/llvm/llvm-project/pull/226535