[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, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineVerifier.cpp b/llvm/lib/CodeGen/MachineVerifier.cpp
index 395f5de..d0d3af0 100644
--- a/llvm/lib/CodeGen/MachineVerifier.cpp
+++ b/llvm/lib/CodeGen/MachineVerifier.cpp
@@ -316,7 +316,7 @@ namespace {
       AU.addUsedIfAvailable<LiveStacks>();
       AU.addUsedIfAvailable<LiveVariablesWrapperPass>();
       AU.addUsedIfAvailable<SlotIndexesWrapperPass>();
-      AU.addUsedIfAvailable<LiveIntervals>();
+      AU.addUsedIfAvailable<LiveIntervalsWrapperPass>();
       AU.setPreservesAll();
       MachineFunctionPass::getAnalysisUsage(AU);
     }
@@ -428,7 +428,8 @@ unsigned MachineVerifier::verify(const MachineFunction &MF) {
       MachineFunctionProperties::Property::TracksDebugUserValues);
 
   if (PASS) {
-    LiveInts = PASS->getAnalysisIfAvailable<LiveIntervals>();
+    auto *LISWrapper = PASS->getAnalysisIfAvailable<LiveIntervalsWrapperPass>();
+    LiveInts = LISWrapper ? &LISWrapper->getLIS() : nullptr;
     // We don't want to verify LiveVariables if LiveIntervals is available.
     auto *LVWrapper = PASS->getAnalysisIfAvailable<LiveVariablesWrapperPass>();
     if (!LiveInts)