C++ Module::getValueSymbolTable方法代码示例

static bool validateSymbolSet(DiagnosticEngine &diags,
                              llvm::StringSet<> symbols, llvm::Module &IRModule,
                              bool diagnoseExtraSymbolsInTBD) {
  auto error = false;

  // Diff the two sets of symbols, flagging anything outside their intersection.

  // Delay the emission of errors for things in the IR but not TBD, so we can
  // sort them to get a stable order.
  std::vector<StringRef> irNotTBD;

  for (auto &nameValue : IRModule.getValueSymbolTable()) {
    auto name = nameValue.getKey();
    auto value = nameValue.getValue();
    if (auto GV = dyn_cast<llvm::GlobalValue>(value)) {
      // Is this a symbol that should be listed?
      auto externallyVisible =
          GV->hasExternalLinkage() && !GV->hasHiddenVisibility();
      if (!GV->isDeclaration() && externallyVisible) {
        // Is it listed?
        if (!symbols.erase(name))
          irNotTBD.push_back(name);
      }
    } else {
      assert(symbols.find(name) == symbols.end() &&
             "non-global value in value symbol table");
    }
  }

  std::sort(irNotTBD.begin(), irNotTBD.end());
  for (auto &name : irNotTBD) {
    diags.diagnose(SourceLoc(), diag::symbol_in_ir_not_in_tbd, name,
                   Demangle::demangleSymbolAsString(name));
    error = true;
  }

  if (diagnoseExtraSymbolsInTBD) {
    // Look for any extra symbols.
    for (auto &name : sortSymbols(symbols)) {
      diags.diagnose(SourceLoc(), diag::symbol_in_tbd_not_in_ir, name,
                     Demangle::demangleSymbolAsString(name));
      error = true;
    }
  }

  if (error) {
    diags.diagnose(SourceLoc(), diag::tbd_validation_failure);
  }

  return error;
}

/// ValueEnumerator - Enumerate module-level information.
ValueEnumerator::ValueEnumerator(const llvm::Module &M,
                                 bool ShouldPreserveUseListOrder)
    : HasMDString(false), HasDILocation(false),
    ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {
  assert(!ShouldPreserveUseListOrder &&
         "not supported UseListOrders = predictUseListOrder(M)");

  // Enumerate the global variables.
  for (llvm::Module::const_global_iterator I = M.global_begin(), E = M.global_end();
       I != E; ++I)
    EnumerateValue(I);

  // Enumerate the functions.
  for (llvm::Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
    EnumerateValue(I);
    EnumerateAttributes(cast<Function>(I)->getAttributes());
  }

  // Enumerate the aliases.
  for (llvm::Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
       I != E; ++I)
    EnumerateValue(I);

  // Remember what is the cutoff between globalvalue's and other constants.
  unsigned FirstConstant = Values.size();

  // Enumerate the global variable initializers.
  for (llvm::Module::const_global_iterator I = M.global_begin(), E = M.global_end();
       I != E; ++I)
    if (I->hasInitializer())
      EnumerateValue(I->getInitializer());

  // Enumerate the aliasees.
  for (llvm::Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
       I != E; ++I)
    EnumerateValue(I->getAliasee());

  // Enumerate the metadata type.
  //
  // TODO: Move this to ValueEnumerator::EnumerateOperandType() once bitcode
  // only encodes the metadata type when it's used as a value.
  EnumerateType(Type::getMetadataTy(M.getContext()));

  // Insert constants and metadata that are named at module level into the slot
  // pool so that the module symbol table can refer to them...
  EnumerateValueSymbolTable(M.getValueSymbolTable());
  EnumerateNamedMetadata(M);

  SmallVector<std::pair<unsigned, MDNode *>, 8> MDs;

  // Enumerate types used by function bodies and argument lists.
  for (const Function &F : M) {
    for (const Argument &A : F.args())
      EnumerateType(A.getType());

    for (const BasicBlock &BB : F)
      for (const Instruction &I : BB) {
        for (const Use &Op : I.operands()) {
          auto *MD = dyn_cast<MetadataAsValue>(&Op);
          if (!MD) {
            EnumerateOperandType(Op);
            continue;
          }

          // Local metadata is enumerated during function-incorporation.
          if (isa<LocalAsMetadata>(MD->getMetadata()))
            continue;

          EnumerateMetadata(MD->getMetadata());
        }
        EnumerateType(I.getType());
        if (const CallInst *CI = dyn_cast<CallInst>(&I))
          EnumerateAttributes(CI->getAttributes());
        else if (const InvokeInst *II = dyn_cast<InvokeInst>(&I))
          EnumerateAttributes(II->getAttributes());

        // Enumerate metadata attached with this instruction.
        MDs.clear();
        I.getAllMetadataOtherThanDebugLoc(MDs);
        for (unsigned i = 0, e = MDs.size(); i != e; ++i)
          EnumerateMetadata(MDs[i].second);

#if LLVM_VERSION >= 37
        if (I.getDebugLoc()) {
          MDNode* Scope = I.getDebugLoc().getScope();
          if (Scope) EnumerateMetadata(Scope);
          DILocation *IA = I.getDebugLoc().getInlinedAt();
          if (IA) EnumerateMetadata(IA);
        }
#else
        if (!I.getDebugLoc().isUnknown()) {
          MDNode *Scope, *IA;
          I.getDebugLoc().getScopeAndInlinedAt(Scope, IA, I.getContext());
          if (Scope) EnumerateMetadata(Scope);
          if (IA) EnumerateMetadata(IA);
        }
#endif
      }
  }
//.........这里部分代码省略.........