[LegacyPM] Remove AttributorLegacyPass and AttributorCGSCCLegacyPass

[LiDongjin]

Summary

Using the legacy pass manager for the optimization pipeline is deprecated.
And remove -enable-new-pm flag.

[jdoerfert]

Thanks for the patch. It's fine with me but there is a user of the Attribtutor still using old PM (in the backend).

@arsenm We are loosing test coverage here. What is needed to port your use case to the new PM?

llvm/include/llvm/InitializePasses.h

 void initializeAlignmentFromAssumptionsPass(PassRegistry&);
 void initializeAlwaysInlinerLegacyPassPass(PassRegistry&);
 void initializeAssumeSimplifyPassLegacyPassPass(PassRegistry &);
 void initializeAssumeBuilderPassLegacyPassPass(PassRegistry &);
 void initializeAnnotation2MetadataLegacyPass(PassRegistry &);
 void initializeAnnotationRemarksLegacyPass(PassRegistry &);
 void initializeAssumptionCacheTrackerPass(PassRegistry&);
 void initializeAtomicExpandPass(PassRegistry&);
-void initializeAttributorLegacyPassPass(PassRegistry&);
-void initializeAttributorCGSCCLegacyPassPass(PassRegistry &);
 void initializeBasicBlockSectionsProfileReaderPass(PassRegistry &);
 void initializeBasicBlockSectionsPass(PassRegistry &);
 void initializeBDCELegacyPassPass(PassRegistry&);
 void initializeBarrierNoopPass(PassRegistry&);
 void initializeBasicAAWrapperPassPass(PassRegistry&);
 void initializeBlockExtractorLegacyPassPass(PassRegistry &);
 void initializeBlockFrequencyInfoWrapperPassPass(PassRegistry&);
 void initializeBoundsCheckingLegacyPassPass(PassRegistry&);

llvm/include/llvm/LinkAllPasses.h

ForcePassLinking() {
       (void) llvm::createMergedLoadStoreMotionPass();
       (void) llvm::createGVNPass();
       (void) llvm::createNewGVNPass();
       (void) llvm::createMemCpyOptPass();
       (void) llvm::createLoopDeletionPass();
       (void) llvm::createPostDomTree();
       (void) llvm::createInstructionNamerPass();
       (void) llvm::createMetaRenamerPass();
-      (void) llvm::createAttributorLegacyPass();
-      (void) llvm::createAttributorCGSCCLegacyPass();
       (void) llvm::createPostOrderFunctionAttrsLegacyPass();
       (void) llvm::createReversePostOrderFunctionAttrsPass();
       (void) llvm::createMergeFunctionsPass();
       (void) llvm::createMergeICmpsLegacyPass();
       (void) llvm::createExpandLargeDivRemPass();
       (void) llvm::createExpandMemCmpPass();
       (void) llvm::createExpandVectorPredicationPass();
       std::string buf;

llvm/include/llvm/Transforms/IPO/Attributor.h

 struct AttributorPass : public PassInfoMixin<AttributorPass> {
   PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
 };
 struct AttributorCGSCCPass : public PassInfoMixin<AttributorCGSCCPass> {
   PreservedAnalyses run(LazyCallGraph::SCC &C, CGSCCAnalysisManager &AM,
                         LazyCallGraph &CG, CGSCCUpdateResult &UR);
 };
 
-Pass *createAttributorLegacyPass();
-Pass *createAttributorCGSCCLegacyPass();
-
 /// Helper function to clamp a state \p S of type \p StateType with the
 /// information in \p R and indicate/return if \p S did change (as-in update is
 /// required to be run again).
 template <typename StateType>
 ChangeStatus clampStateAndIndicateChange(StateType &S, const StateType &R) {
   auto Assumed = S.getAssumed();
   S ^= R;
   return Assumed == S.getAssumed() ? ChangeStatus::UNCHANGED

llvm/lib/Transforms/IPO/Attributor.cpp

static std::string getNodeLabel(const AADepGraphNode *Node,
     std::string AAString;
     raw_string_ostream O(AAString);
     Node->print(O);
     return AAString;
   }
 };
 
 } // end namespace llvm
-
-namespace {
-
-struct AttributorLegacyPass : public ModulePass {
-  static char ID;
-
-  AttributorLegacyPass() : ModulePass(ID) {
-    initializeAttributorLegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnModule(Module &M) override {
-    if (skipModule(M))
-      return false;
-
-    AnalysisGetter AG;
-    SetVector<Function *> Functions;
-    for (Function &F : M)
-      Functions.insert(&F);
-
-    CallGraphUpdater CGUpdater;
-    BumpPtrAllocator Allocator;
-    InformationCache InfoCache(M, AG, Allocator, /* CGSCC */ nullptr);
-    return runAttributorOnFunctions(InfoCache, Functions, AG, CGUpdater,
-                                    /* DeleteFns*/ true,
-                                    /* IsModulePass */ true);
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    // FIXME: Think about passes we will preserve and add them here.
-    AU.addRequired<TargetLibraryInfoWrapperPass>();
-  }
-};
-
-struct AttributorCGSCCLegacyPass : public CallGraphSCCPass {
-  static char ID;
-
-  AttributorCGSCCLegacyPass() : CallGraphSCCPass(ID) {
-    initializeAttributorCGSCCLegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnSCC(CallGraphSCC &SCC) override {
-    if (skipSCC(SCC))
-      return false;
-
-    SetVector<Function *> Functions;
-    for (CallGraphNode *CGN : SCC)
-      if (Function *Fn = CGN->getFunction())
-        if (!Fn->isDeclaration())
-          Functions.insert(Fn);
-
-    if (Functions.empty())
-      return false;
-
-    AnalysisGetter AG;
-    CallGraph &CG = const_cast<CallGraph &>(SCC.getCallGraph());
-    CallGraphUpdater CGUpdater;
-    CGUpdater.initialize(CG, SCC);
-    Module &M = *Functions.back()->getParent();
-    BumpPtrAllocator Allocator;
-    InformationCache InfoCache(M, AG, Allocator, /* CGSCC */ &Functions);
-    return runAttributorOnFunctions(InfoCache, Functions, AG, CGUpdater,
-                                    /* DeleteFns */ false,
-                                    /* IsModulePass */ false);
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    // FIXME: Think about passes we will preserve and add them here.
-    AU.addRequired<TargetLibraryInfoWrapperPass>();
-    CallGraphSCCPass::getAnalysisUsage(AU);
-  }
-};
-
-} // end anonymous namespace
-
-Pass *llvm::createAttributorLegacyPass() { return new AttributorLegacyPass(); }
-Pass *llvm::createAttributorCGSCCLegacyPass() {
-  return new AttributorCGSCCLegacyPass();
-}
-
-char AttributorLegacyPass::ID = 0;
-char AttributorCGSCCLegacyPass::ID = 0;
-
-INITIALIZE_PASS_BEGIN(AttributorLegacyPass, "attributor",
-                      "Deduce and propagate attributes", false, false)
-INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_END(AttributorLegacyPass, "attributor",
-                    "Deduce and propagate attributes", false, false)
-INITIALIZE_PASS_BEGIN(AttributorCGSCCLegacyPass, "attributor-cgscc",
-                      "Deduce and propagate attributes (CGSCC pass)", false,
-                      false)
-INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass)
-INITIALIZE_PASS_END(AttributorCGSCCLegacyPass, "attributor-cgscc",
-                    "Deduce and propagate attributes (CGSCC pass)", false,
-                    false)

llvm/lib/Transforms/IPO/IPO.cpp

void llvm::initializeIPO(PassRegistry &Registry) {
   initializeSimpleInlinerPass(Registry);
   initializeInferFunctionAttrsLegacyPassPass(Registry);
   initializeInternalizeLegacyPassPass(Registry);
   initializeLoopExtractorLegacyPassPass(Registry);
   initializeBlockExtractorLegacyPassPass(Registry);
   initializeSingleLoopExtractorPass(Registry);
   initializeMergeFunctionsLegacyPassPass(Registry);
   initializePartialInlinerLegacyPassPass(Registry);
-  initializeAttributorLegacyPassPass(Registry);
-  initializeAttributorCGSCCLegacyPassPass(Registry);
   initializePostOrderFunctionAttrsLegacyPassPass(Registry);
   initializeReversePostOrderFunctionAttrsLegacyPassPass(Registry);
   initializeIPSCCPLegacyPassPass(Registry);
   initializeStripDeadPrototypesLegacyPassPass(Registry);
   initializeStripSymbolsPass(Registry);
   initializeStripDebugDeclarePass(Registry);
   initializeStripDeadDebugInfoPass(Registry);
   initializeStripNonDebugSymbolsPass(Registry);

llvm/test/Transforms/Attributor/value-simplify-pointer-info-struct.ll

 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
-; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=9 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
 ; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=9 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
-; RUN: opt -attributor-cgscc -enable-new-pm=0 -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_NPM,IS__CGSCC____,IS________OPM,IS__CGSCC_OPM
 ; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_OPM,IS__CGSCC____,IS________NPM,IS__CGSCC_NPM
 ;
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 
 %struct.S = type { i32, double, ptr, i32 }
 
 ;    struct S {
 ;      int a;