[CodeGen][NewPM] Port `LiveIntervals` to new pass manager (#98118)

- Add `LiveIntervalsAnalysis`.
- Add `LiveIntervalsPrinterPass`.
- Use `LiveIntervalsWrapperPass` in legacy pass manager.
- Use `std::unique_ptr` instead of raw pointer for `LICalc`, so
destructor and default move constructor can handle it correctly.

This would be the last analysis required by `PHIElimination`.

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/LiveDebugVariables.cpp b/llvm/lib/CodeGen/LiveDebugVariables.cpp
index 3224bed..d1341f1 100644
--- a/llvm/lib/CodeGen/LiveDebugVariables.cpp
+++ b/llvm/lib/CodeGen/LiveDebugVariables.cpp
@@ -79,13 +79,13 @@ char LiveDebugVariables::ID = 0;
 INITIALIZE_PASS_BEGIN(LiveDebugVariables, DEBUG_TYPE,
                 "Debug Variable Analysis", false, false)
 INITIALIZE_PASS_DEPENDENCY(MachineDominatorTreeWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(LiveIntervals)
+INITIALIZE_PASS_DEPENDENCY(LiveIntervalsWrapperPass)
 INITIALIZE_PASS_END(LiveDebugVariables, DEBUG_TYPE,
                 "Debug Variable Analysis", false, false)
 
 void LiveDebugVariables::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<MachineDominatorTreeWrapperPass>();
-  AU.addRequiredTransitive<LiveIntervals>();
+  AU.addRequiredTransitive<LiveIntervalsWrapperPass>();
   AU.setPreservesAll();
   MachineFunctionPass::getAnalysisUsage(AU);
 }
@@ -1263,7 +1263,7 @@ void LDVImpl::computeIntervals() {
 bool LDVImpl::runOnMachineFunction(MachineFunction &mf, bool InstrRef) {
   clear();
   MF = &mf;
-  LIS = &pass.getAnalysis<LiveIntervals>();
+  LIS = &pass.getAnalysis<LiveIntervalsWrapperPass>().getLIS();
   TRI = mf.getSubtarget().getRegisterInfo();
   LLVM_DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: "
                     << mf.getName() << " **********\n");