[llvm] [CodeGen][NewPM] Port LiveDebugVariables to NPM (PR #115468)

[Matt Arsenault via llvm-commits]

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@@ -1298,31 +1299,63 @@ static void removeDebugInstrs(MachineFunction &mf) {
   }
 }
 
-bool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) {
-  if (!EnableLDV)
-    return false;
-  if (!mf.getFunction().getSubprogram()) {
-    removeDebugInstrs(mf);
-    return false;
-  }
+bool LiveDebugVariablesWrapperLegacy::runOnMachineFunction(
+    MachineFunction &mf) {
+  auto *LIS = &getAnalysis<LiveIntervalsWrapperPass>().getLIS();
 
-  // Have we been asked to track variable locations using instruction
-  // referencing?
-  bool InstrRef = mf.useDebugInstrRef();
+  Impl = std::make_unique<LiveDebugVariables>();
+  Impl->analyze(mf, LIS);
+  return false;
+}
+
+AnalysisKey LiveDebugVariablesAnalysis::Key;
 
-  if (!pImpl)
-    pImpl = new LDVImpl(this);
-  return static_cast<LDVImpl *>(pImpl)->runOnMachineFunction(mf, InstrRef);
+LiveDebugVariables
+LiveDebugVariablesAnalysis::run(MachineFunction &MF,
+                                MachineFunctionAnalysisManager &MFAM) {
+  auto *LIS = &MFAM.getResult<LiveIntervalsAnalysis>(MF);
+  LiveDebugVariables LDV;
+  LDV.analyze(MF, LIS);
+  return LDV;
+}
+
+PreservedAnalyses
+LiveDebugVariablesPrinterPass::run(MachineFunction &MF,
+                                   MachineFunctionAnalysisManager &MFAM) {
+  auto &LDV = MFAM.getResult<LiveDebugVariablesAnalysis>(MF);
+  LDV.print(dbgs());
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arsenm wrote:

Shouldn't use dbgs in a printer pass run 

https://github.com/llvm/llvm-project/pull/115468