[llvm] [CodeGen][NewPM] Port RegAllocGreedy to NPM (PR #119540)

[Matt Arsenault via llvm-commits]

================
@@ -146,11 +149,160 @@ static cl::opt<unsigned> SplitThresholdForRegWithHint(
 static RegisterRegAlloc greedyRegAlloc("greedy", "greedy register allocator",
                                        createGreedyRegisterAllocator);
 
-char RAGreedy::ID = 0;
-char &llvm::RAGreedyID = RAGreedy::ID;
+namespace {
+class RAGreedyLegacy : public MachineFunctionPass {
+  RegAllocFilterFunc F;
 
-INITIALIZE_PASS_BEGIN(RAGreedy, "greedy",
-                "Greedy Register Allocator", false, false)
+public:
+  RAGreedyLegacy(const RegAllocFilterFunc F = nullptr);
+
+  static char ID;
+  /// Return the pass name.
+  StringRef getPassName() const override { return "Greedy Register Allocator"; }
+
+  /// RAGreedy analysis usage.
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+  /// Perform register allocation.
+  bool runOnMachineFunction(MachineFunction &mf) override;
+
+  MachineFunctionProperties getRequiredProperties() const override {
+    return MachineFunctionProperties().set(
+        MachineFunctionProperties::Property::NoPHIs);
+  }
+
+  MachineFunctionProperties getClearedProperties() const override {
+    return MachineFunctionProperties().set(
+        MachineFunctionProperties::Property::IsSSA);
+  }
+};
+
+} // end anonymous namespace
+
+RAGreedyLegacy::RAGreedyLegacy(const RegAllocFilterFunc F)
+    : MachineFunctionPass(ID), F(F) {
+  initializeRAGreedyLegacyPass(*PassRegistry::getPassRegistry());
+}
+
+struct RAGreedy::RequiredAnalyses {
+  VirtRegMap *VRM = nullptr;
+  LiveIntervals *LIS = nullptr;
+  LiveRegMatrix *LRM = nullptr;
+  SlotIndexes *Indexes = nullptr;
+  MachineBlockFrequencyInfo *MBFI = nullptr;
+  MachineDominatorTree *DomTree = nullptr;
+  MachineLoopInfo *Loops = nullptr;
+  MachineOptimizationRemarkEmitter *ORE = nullptr;
+  EdgeBundles *Bundles = nullptr;
+  SpillPlacement *SpillPlacer = nullptr;
+  LiveDebugVariables *DebugVars = nullptr;
+
+  // Used by InlineSpiller
+  LiveStacks *LSS;
+  // Proxies for eviction and priority advisors
+  RegAllocEvictionAdvisorProvider *EvictProvider;
+  RegAllocPriorityAdvisorProvider *PriorityProvider;
+
+  RequiredAnalyses() {}
----------------
arsenm wrote:

Probably don't need the default constructor
```suggestion
  RequiredAnalyses() = delete;
```

https://github.com/llvm/llvm-project/pull/119540