[NewPM] Remove AAEval Legacy Pass (#71358)

This patch removes the AAEval legacy pass and associated plumbing. This
pass was migrated over to the new pass manager about 11 years ago at
this point and there are currently no in-tree users of the legacy pass,
so it's essentially just dead code and is completely untested.

llvm/include/llvm/Analysis/AliasAnalysisEvaluator.h

@@ -54,15 +54,8 @@ class AAEvaluator : public PassInfoMixin<AAEvaluator> {
   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
 
 private:
-  // Allow the legacy pass to run this using an internal API.
-  friend class AAEvalLegacyPass;
-
   void runInternal(Function &F, AAResults &AA);
 };
-
-/// Create a wrapper of the above for the legacy pass manager.
-FunctionPass *createAAEvalPass();
-
 }
 
 #endif

llvm/include/llvm/InitializePasses.h

@@ -48,7 +48,6 @@ void initializeGlobalISel(PassRegistry&);
 /// Initialize all passes linked into the CodeGen library.
 void initializeTarget(PassRegistry&);
 
-void initializeAAEvalLegacyPassPass(PassRegistry&);
 void initializeAAResultsWrapperPassPass(PassRegistry&);
 void initializeAlwaysInlinerLegacyPassPass(PassRegistry&);
 void initializeAssignmentTrackingAnalysisPass(PassRegistry &);

llvm/include/llvm/LinkAllPasses.h

@@ -61,7 +61,6 @@ namespace {
       if (std::getenv("bar") != (char*) -1)
         return;
 
-      (void) llvm::createAAEvalPass();
       (void) llvm::createBasicAAWrapperPass();
       (void) llvm::createSCEVAAWrapperPass();
       (void) llvm::createTypeBasedAAWrapperPass();

llvm/lib/Analysis/AliasAnalysisEvaluator.cpp

@@ -14,8 +14,6 @@
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Module.h"
-#include "llvm/InitializePasses.h"
-#include "llvm/Pass.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
@@ -319,45 +317,3 @@ AAEvaluator::~AAEvaluator() {
            << "%/" << ModRefCount * 100 / ModRefSum << "%\n";
   }
 }
-
-namespace llvm {
-class AAEvalLegacyPass : public FunctionPass {
-  std::unique_ptr<AAEvaluator> P;
-
-public:
-  static char ID; // Pass identification, replacement for typeid
-  AAEvalLegacyPass() : FunctionPass(ID) {
-    initializeAAEvalLegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<AAResultsWrapperPass>();
-    AU.setPreservesAll();
-  }
-
-  bool doInitialization(Module &M) override {
-    P.reset(new AAEvaluator());
-    return false;
-  }
-
-  bool runOnFunction(Function &F) override {
-    P->runInternal(F, getAnalysis<AAResultsWrapperPass>().getAAResults());
-    return false;
-  }
-  bool doFinalization(Module &M) override {
-    P.reset();
-    return false;
-  }
-};
-}
-
-char AAEvalLegacyPass::ID = 0;
-INITIALIZE_PASS_BEGIN(AAEvalLegacyPass, "aa-eval",
-                      "Exhaustive Alias Analysis Precision Evaluator", false,
-                      true)
-INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)
-INITIALIZE_PASS_END(AAEvalLegacyPass, "aa-eval",
-                    "Exhaustive Alias Analysis Precision Evaluator", false,
-                    true)
-
-FunctionPass *llvm::createAAEvalPass() { return new AAEvalLegacyPass(); }

llvm/lib/Analysis/Analysis.cpp

@@ -18,7 +18,6 @@ using namespace llvm;
 
 /// initializeAnalysis - Initialize all passes linked into the Analysis library.
 void llvm::initializeAnalysis(PassRegistry &Registry) {
-  initializeAAEvalLegacyPassPass(Registry);
   initializeBasicAAWrapperPassPass(Registry);
   initializeBlockFrequencyInfoWrapperPassPass(Registry);
   initializeBranchProbabilityInfoWrapperPassPass(Registry);