[llvm] [MergeFunctions] Add support to run the pass over a set of function pointers (PR #111045)

[Nikita Popov via llvm-commits]

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@@ -25,6 +27,10 @@ class Module;
 class MergeFunctionsPass : public PassInfoMixin<MergeFunctionsPass> {
 public:
   PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+
+  static bool runOnModule(Module &M);
+  static std::pair<bool, DenseMap<Function *, Function *>>
+  runOnFunctions(std::set<Function *> &F);
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nikic wrote:

Generally, do not use `std::set`. In this case, you'll probably want to accept `ArrayRef` instead and construct it via `SetVector::getArrayRef()` in the caller. (Assuming you want something deduplicated but order-sensitive.)

https://github.com/llvm/llvm-project/pull/111045