[llvm] [AMDGPU][NewPM] Port AMDGPUReserveWWMRegs to NPM (PR #123722)

[Matt Arsenault via llvm-commits]

================
@@ -47,16 +48,32 @@ class AMDGPUReserveWWMRegs : public MachineFunctionPass {
   }
 };
 
+class AMDGPUReserveWWMRegs {
+public:
+  bool run(MachineFunction &MF);
+};
+
 } // End anonymous namespace.
 
-INITIALIZE_PASS(AMDGPUReserveWWMRegs, DEBUG_TYPE,
+INITIALIZE_PASS(AMDGPUReserveWWMRegsLegacy, DEBUG_TYPE,
                 "AMDGPU Reserve WWM Registers", false, false)
 
-char AMDGPUReserveWWMRegs::ID = 0;
+char AMDGPUReserveWWMRegsLegacy::ID = 0;
+
+char &llvm::AMDGPUReserveWWMRegsLegacyID = AMDGPUReserveWWMRegsLegacy::ID;
 
-char &llvm::AMDGPUReserveWWMRegsID = AMDGPUReserveWWMRegs::ID;
+bool AMDGPUReserveWWMRegsLegacy::runOnMachineFunction(MachineFunction &MF) {
+  return AMDGPUReserveWWMRegs().run(MF);
+}
+
+PreservedAnalyses
+AMDGPUReserveWWMRegsPass::run(MachineFunction &MF,
+                              MachineFunctionAnalysisManager &) {
+  AMDGPUReserveWWMRegs().run(MF);
+  return PreservedAnalyses::all();
----------------
arsenm wrote:

There's an open PR to treat RegisterClassInfo as an analysis this will not preserve

https://github.com/llvm/llvm-project/pull/123722