[llvm] [GenericCycle] Add a Cache for getExitBlocks in GenericCycle (PR #112290)

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git-clang-format --diff b8ee0aac2ad914ef663c0f1892f8a4d5cc70b9fc 08ce9cda6c231dd0ca80985bfc2ea92442fd6e25 --extensions h -- llvm/include/llvm/ADT/GenericCycleImpl.h llvm/include/llvm/ADT/GenericCycleInfo.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/include/llvm/ADT/GenericCycleInfo.h b/llvm/include/llvm/ADT/GenericCycleInfo.h
index 98d935975c..f3f1a0c45a 100644
--- a/llvm/include/llvm/ADT/GenericCycleInfo.h
+++ b/llvm/include/llvm/ADT/GenericCycleInfo.h
@@ -96,7 +96,7 @@ private:
 
 public:
   GenericCycle()
-      : ExitBlocksCache(std::make_unique<SmallVector<BlockT *, 4>>()){};
+      : ExitBlocksCache(std::make_unique<SmallVector<BlockT *, 4>>()) {};
 
   /// \brief Whether the cycle is a natural loop.
   bool isReducible() const { return Entries.size() == 1; }

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https://github.com/llvm/llvm-project/pull/112290