[llvm] [PartialInlining] Use DenseSet instead of DenseMap (NFC) (PR #127170)

[Kazu Hirata via llvm-commits]

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@@ -412,9 +412,9 @@ PartialInlinerImpl::computeOutliningColdRegionsInfo(
   bool ColdCandidateFound = false;
   BasicBlock *CurrEntry = EntryBlock;
   std::vector<BasicBlock *> DFS;
-  DenseMap<BasicBlock *, bool> VisitedMap;
+  DenseSet<BasicBlock *> VisitedSet;
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kazutakahirata wrote:

Revised.  Thanks!

https://github.com/llvm/llvm-project/pull/127170