C++ SmallVector::emplace_back方法代码示例

/// Returns a generated guard statement that checks whether the given lhs and
/// rhs expressions are equal. If not equal, the else block for the guard
/// returns false.
/// \p C The AST context.
/// \p lhsExpr The first expression to compare for equality.
/// \p rhsExpr The second expression to compare for equality.
static GuardStmt *returnIfNotEqualGuard(ASTContext &C,
                                        Expr *lhsExpr,
                                        Expr *rhsExpr) {
  SmallVector<StmtConditionElement, 1> conditions;
  SmallVector<ASTNode, 1> statements;

  // First, generate the statement for the body of the guard.
  // return false
  auto falseExpr = new (C) BooleanLiteralExpr(false, SourceLoc(),
                                              /*Implicit*/true);
  auto returnStmt = new (C) ReturnStmt(SourceLoc(), falseExpr);
  statements.emplace_back(ASTNode(returnStmt));

  // Next, generate the condition being checked.
  // lhs == rhs
  auto cmpFuncExpr = new (C) UnresolvedDeclRefExpr(
    DeclName(C.getIdentifier("==")), DeclRefKind::BinaryOperator,
    DeclNameLoc());
  auto cmpArgsTuple = TupleExpr::create(C, SourceLoc(),
                                        { lhsExpr, rhsExpr },
                                        { }, { }, SourceLoc(),
                                        /*HasTrailingClosure*/false,
                                        /*Implicit*/true);
  auto cmpExpr = new (C) BinaryExpr(cmpFuncExpr, cmpArgsTuple,
                                    /*Implicit*/true);
  conditions.emplace_back(cmpExpr);

  // Build and return the complete guard statement.
  // guard lhs == rhs else { return false }
  auto body = BraceStmt::create(C, SourceLoc(), statements, SourceLoc());
  return new (C) GuardStmt(SourceLoc(), C.AllocateCopy(conditions), body);
}

bool IRTranslator::translateCall(const CallInst &CI) {
  auto TII = MIRBuilder.getMF().getTarget().getIntrinsicInfo();
  const Function &F = *CI.getCalledFunction();
  Intrinsic::ID ID = F.getIntrinsicID();
  if (TII && ID == Intrinsic::not_intrinsic)
    ID = static_cast<Intrinsic::ID>(TII->getIntrinsicID(&F));

  assert(ID != Intrinsic::not_intrinsic && "FIXME: support real calls");

  // Need types (starting with return) & args.
  SmallVector<LLT, 4> Tys;
  Tys.emplace_back(*CI.getType());
  for (auto &Arg : CI.arg_operands())
    Tys.emplace_back(*Arg->getType());

  unsigned Res = CI.getType()->isVoidTy() ? 0 : getOrCreateVReg(CI);
  MachineInstrBuilder MIB =
      MIRBuilder.buildIntrinsic(Tys, ID, Res, !CI.doesNotAccessMemory());

  for (auto &Arg : CI.arg_operands()) {
    if (ConstantInt *CI = dyn_cast<ConstantInt>(Arg))
      MIB.addImm(CI->getSExtValue());
    else
      MIB.addUse(getOrCreateVReg(*Arg));
  }
  return true;
}

/// Emit column labels for the table in the index.
static void emitColumnLabelsForIndex(raw_ostream &OS) {
  SmallVector<std::string, 4> Columns;
  Columns.emplace_back(tag("td", "Filename", "column-entry-left"));
  for (const char *Label : {"Function Coverage", "Instantiation Coverage",
                            "Line Coverage", "Region Coverage"})
    Columns.emplace_back(tag("td", Label, "column-entry"));
  OS << tag("tr", join(Columns.begin(), Columns.end(), ""));
}

/// Render a file coverage summary (\p FCS) in a table row. If \p IsTotals is
/// false, link the summary to \p SF.
void CoveragePrinterHTML::emitFileSummary(raw_ostream &OS, StringRef SF,
                                          const FileCoverageSummary &FCS,
                                          bool IsTotals) const {
  SmallVector<std::string, 8> Columns;

  // Format a coverage triple and add the result to the list of columns.
  auto AddCoverageTripleToColumn = [&Columns](unsigned Hit, unsigned Total,
                                              float Pctg) {
    std::string S;
    {
      raw_string_ostream RSO{S};
      if (Total)
        RSO << format("%*.2f", 7, Pctg) << "% ";
      else
        RSO << "- ";
      RSO << '(' << Hit << '/' << Total << ')';
    }
    const char *CellClass = "column-entry-yellow";
    if (Hit == Total)
      CellClass = "column-entry-green";
    else if (Pctg < 80.0)
      CellClass = "column-entry-red";
    Columns.emplace_back(tag("td", tag("pre", S), CellClass));
  };

  // Simplify the display file path, and wrap it in a link if requested.
  std::string Filename;
  if (IsTotals) {
    Filename = SF;
  } else {
    Filename = buildLinkToFile(SF, FCS);
  }

  Columns.emplace_back(tag("td", tag("pre", Filename)));
  AddCoverageTripleToColumn(FCS.FunctionCoverage.getExecuted(),
                            FCS.FunctionCoverage.getNumFunctions(),
                            FCS.FunctionCoverage.getPercentCovered());
  if (Opts.ShowInstantiationSummary)
    AddCoverageTripleToColumn(FCS.InstantiationCoverage.getExecuted(),
                              FCS.InstantiationCoverage.getNumFunctions(),
                              FCS.InstantiationCoverage.getPercentCovered());
  AddCoverageTripleToColumn(FCS.LineCoverage.getCovered(),
                            FCS.LineCoverage.getNumLines(),
                            FCS.LineCoverage.getPercentCovered());
  if (Opts.ShowRegionSummary)
    AddCoverageTripleToColumn(FCS.RegionCoverage.getCovered(),
                              FCS.RegionCoverage.getNumRegions(),
                              FCS.RegionCoverage.getPercentCovered());

  if (IsTotals)
    OS << tag("tr", join(Columns.begin(), Columns.end(), ""), "light-row-bold");
  else
    OS << tag("tr", join(Columns.begin(), Columns.end(), ""), "light-row");
}

void InstructionTables::run() {
  ArrayRef<uint64_t> Masks = IB.getProcResourceMasks();
  SmallVector<std::pair<ResourceRef, double>, 4> UsedResources;

  // Create an instruction descriptor for every instruction in the sequence.
  while (S.hasNext()) {
    UsedResources.clear();
    SourceRef SR = S.peekNext();
    std::unique_ptr<Instruction> Inst = IB.createInstruction(*SR.second);
    const InstrDesc &Desc = Inst->getDesc();
    // Now identify the resources consumed by this instruction.
    for (const std::pair<uint64_t, ResourceUsage> Resource : Desc.Resources) {
      // Skip zero-cycle resources (i.e. unused resources).
      if (!Resource.second.size())
        continue;
      double Cycles = static_cast<double>(Resource.second.size());
      unsigned Index =
          std::distance(Masks.begin(), std::find(Masks.begin(), Masks.end(),
                                                 Resource.first));
      const MCProcResourceDesc &ProcResource = *SM.getProcResource(Index);
      unsigned NumUnits = ProcResource.NumUnits;
      if (!ProcResource.SubUnitsIdxBegin) {
        // The number of cycles consumed by each unit.
        Cycles /= NumUnits;
        for (unsigned I = 0, E = NumUnits; I < E; ++I) {
          ResourceRef ResourceUnit = std::make_pair(Index, 1U << I);
          UsedResources.emplace_back(std::make_pair(ResourceUnit, Cycles));
        }
        continue;
      }

      // This is a group. Obtain the set of resources contained in this
      // group. Some of these resources may implement multiple units.
      // Uniformly distribute Cycles across all of the units.
      for (unsigned I1 = 0; I1 < NumUnits; ++I1) {
        unsigned SubUnitIdx = ProcResource.SubUnitsIdxBegin[I1];
        const MCProcResourceDesc &SubUnit = *SM.getProcResource(SubUnitIdx);
        // Compute the number of cycles consumed by each resource unit.
        double RUCycles = Cycles / (NumUnits * SubUnit.NumUnits);
        for (unsigned I2 = 0, E2 = SubUnit.NumUnits; I2 < E2; ++I2) {
          ResourceRef ResourceUnit = std::make_pair(SubUnitIdx, 1U << I2);
          UsedResources.emplace_back(std::make_pair(ResourceUnit, RUCycles));
        }
      }
    }

    // Now send a fake instruction issued event to all the views.
    InstRef IR(SR.first, Inst.get());
    HWInstructionIssuedEvent Event(IR, UsedResources);
    for (std::unique_ptr<View> &Listener : Views)
      Listener->onInstructionEvent(Event);
    S.updateNext();
  }
}

/// Render a file coverage summary (\p FCS) in a table row. If \p IsTotals is
/// false, link the summary to \p SF.
void CoveragePrinterHTML::emitFileSummary(raw_ostream &OS, StringRef SF,
                                          const FileCoverageSummary &FCS,
                                          bool IsTotals) const {
  SmallVector<std::string, 8> Columns;

  // Format a coverage triple and add the result to the list of columns.
  auto AddCoverageTripleToColumn = [&Columns](unsigned Hit, unsigned Total,
                                              float Pctg) {
    std::string S;
    {
      raw_string_ostream RSO{S};
      if (Total)
        RSO << format("%*.2f", 7, Pctg) << "% ";
      else
        RSO << "- ";
      RSO << '(' << Hit << '/' << Total << ')';
    }
    const char *CellClass = "column-entry-yellow";
    if (Hit == Total)
      CellClass = "column-entry-green";
    else if (Pctg < 80.0)
      CellClass = "column-entry-red";
    Columns.emplace_back(tag("td", tag("pre", S), CellClass));
  };

  // Simplify the display file path, and wrap it in a link if requested.
  std::string Filename;
  if (IsTotals) {
    Filename = "TOTALS";
  } else {
    SmallString<128> LinkTextStr(sys::path::relative_path(FCS.Name));
    sys::path::remove_dots(LinkTextStr, /*remove_dot_dots=*/true);
    sys::path::native(LinkTextStr);
    std::string LinkText = escape(LinkTextStr, Opts);
    std::string LinkTarget =
        escape(getOutputPath(SF, "html", /*InToplevel=*/false), Opts);
    Filename = a(LinkTarget, LinkText);
  }

  Columns.emplace_back(tag("td", tag("pre", Filename)));
  AddCoverageTripleToColumn(FCS.FunctionCoverage.Executed,
                            FCS.FunctionCoverage.NumFunctions,
                            FCS.FunctionCoverage.getPercentCovered());
  AddCoverageTripleToColumn(FCS.InstantiationCoverage.Executed,
                            FCS.InstantiationCoverage.NumFunctions,
                            FCS.InstantiationCoverage.getPercentCovered());
  AddCoverageTripleToColumn(FCS.LineCoverage.Covered, FCS.LineCoverage.NumLines,
                            FCS.LineCoverage.getPercentCovered());
  AddCoverageTripleToColumn(FCS.RegionCoverage.Covered,
                            FCS.RegionCoverage.NumRegions,
                            FCS.RegionCoverage.getPercentCovered());

  OS << tag("tr", join(Columns.begin(), Columns.end(), ""), "light-row");
}

TEST(FileSpecificDiagnosticConsumer,
     ErrorsInUnaffiliatedFilesGoToEveryConsumer) {
  SourceManager sourceMgr;
  //                                             01234
  unsigned bufferA = sourceMgr.addMemBufferCopy("abcde", "A");
  unsigned bufferB = sourceMgr.addMemBufferCopy("vwxyz", "B");

  SourceLoc frontOfA = sourceMgr.getLocForOffset(bufferA, 0);
  SourceLoc middleOfA = sourceMgr.getLocForOffset(bufferA, 2);
  SourceLoc backOfA = sourceMgr.getLocForOffset(bufferA, 4);

  SourceLoc frontOfB = sourceMgr.getLocForOffset(bufferB, 0);
  SourceLoc middleOfB = sourceMgr.getLocForOffset(bufferB, 2);
  SourceLoc backOfB = sourceMgr.getLocForOffset(bufferB, 4);

  ExpectedDiagnostic expectedA[] = {
    {frontOfA, "front"},
    {frontOfB, "front"},
    {middleOfA, "middle"},
    {middleOfB, "middle"},
    {backOfA, "back"},
    {backOfB, "back"}
  };
  ExpectedDiagnostic expectedUnaffiliated[] = {
    {frontOfB, "front"},
    {middleOfB, "middle"},
    {backOfB, "back"}
  };

  auto consumerA = llvm::make_unique<ExpectationDiagnosticConsumer>(
      nullptr, expectedA);
  auto consumerUnaffiliated = llvm::make_unique<ExpectationDiagnosticConsumer>(
      consumerA.get(), expectedUnaffiliated);

  SmallVector<FileSpecificDiagnosticConsumer::Subconsumer, 2> consumers;
  consumers.emplace_back("A", std::move(consumerA));
  consumers.emplace_back("", std::move(consumerUnaffiliated));

  auto topConsumer =
      FileSpecificDiagnosticConsumer::consolidateSubconsumers(consumers);
  topConsumer->handleDiagnostic(sourceMgr, frontOfA, DiagnosticKind::Error,
                                "front", {}, DiagnosticInfo(), SourceLoc());
  topConsumer->handleDiagnostic(sourceMgr, frontOfB, DiagnosticKind::Error,
                                "front", {}, DiagnosticInfo(), SourceLoc());
  topConsumer->handleDiagnostic(sourceMgr, middleOfA, DiagnosticKind::Error,
                                "middle", {}, DiagnosticInfo(), SourceLoc());
  topConsumer->handleDiagnostic(sourceMgr, middleOfB, DiagnosticKind::Error,
                                "middle", {}, DiagnosticInfo(), SourceLoc());
  topConsumer->handleDiagnostic(sourceMgr, backOfA, DiagnosticKind::Error,
                                "back", {}, DiagnosticInfo(), SourceLoc());
  topConsumer->handleDiagnostic(sourceMgr, backOfB, DiagnosticKind::Error,
                                "back", {}, DiagnosticInfo(), SourceLoc());
  topConsumer->finishProcessing();
}

/// Emit column labels for the table in the index.
static void emitColumnLabelsForIndex(raw_ostream &OS,
                                     const CoverageViewOptions &Opts) {
  SmallVector<std::string, 4> Columns;
  Columns.emplace_back(tag("td", "Filename", "column-entry-left"));
  Columns.emplace_back(tag("td", "Function Coverage", "column-entry"));
  if (Opts.ShowInstantiationSummary)
    Columns.emplace_back(tag("td", "Instantiation Coverage", "column-entry"));
  Columns.emplace_back(tag("td", "Line Coverage", "column-entry"));
  if (Opts.ShowRegionSummary)
    Columns.emplace_back(tag("td", "Region Coverage", "column-entry"));
  OS << tag("tr", join(Columns.begin(), Columns.end(), ""));
}

/// Hack to deal with the fact that Sema/CodeSynthesis.cpp creates ParamDecls
/// containing contextual types.
Type ParameterList::getInterfaceType(DeclContext *DC) const {
  auto &C = DC->getASTContext();

  if (size() == 0)
    return TupleType::getEmpty(C);

  SmallVector<TupleTypeElt, 8> argumentInfo;

  for (auto P : *this) {
    assert(P->hasType());

    Type type;
    if (P->hasInterfaceType())
      type = P->getInterfaceType();
    else if (!P->getTypeLoc().hasLocation())
      type = ArchetypeBuilder::mapTypeOutOfContext(DC, P->getType());
    else
      type = P->getType();
    assert(!type->hasArchetype());

    argumentInfo.emplace_back(
        type, P->getArgumentName(),
        ParameterTypeFlags::fromParameterType(type, P->isVariadic()));
  }

  return TupleType::get(argumentInfo, C);
}

TEST(FileSpecificDiagnosticConsumer, SubConsumersFinishInOrder) {
  SourceManager sourceMgr;
  (void)sourceMgr.addMemBufferCopy("abcde", "A");
  (void)sourceMgr.addMemBufferCopy("vwxyz", "B");

  auto consumerA = llvm::make_unique<ExpectationDiagnosticConsumer>(
      nullptr, None);
  auto consumerUnaffiliated = llvm::make_unique<ExpectationDiagnosticConsumer>(
      consumerA.get(), None);

  SmallVector<FileSpecificDiagnosticConsumer::ConsumerPair, 2> consumers;
  consumers.emplace_back("A", std::move(consumerA));
  consumers.emplace_back("", std::move(consumerUnaffiliated));

  FileSpecificDiagnosticConsumer topConsumer(consumers);
  topConsumer.finishProcessing();
}

static SmallVector<StringRef, 2> getNames(const DWARFDie &DIE,
                                          bool IncludeLinkageName = true) {
  SmallVector<StringRef, 2> Result;
  if (const char *Str = DIE.getName(DINameKind::ShortName))
    Result.emplace_back(Str);
  else if (DIE.getTag() == dwarf::DW_TAG_namespace)
    Result.emplace_back("(anonymous namespace)");

  if (IncludeLinkageName) {
    if (const char *Str = DIE.getName(DINameKind::LinkageName)) {
      if (Result.empty() || Result[0] != Str)
        Result.emplace_back(Str);
    }
  }

  return Result;
}

// For WinEH exception representation backend need to know what funclet coro.end
// belongs to. That information is passed in a funclet bundle.
static SmallVector<llvm::OperandBundleDef, 1>
getBundlesForCoroEnd(CodeGenFunction &CGF) {
  SmallVector<llvm::OperandBundleDef, 1> BundleList;

  if (llvm::Instruction *EHPad = CGF.CurrentFuncletPad)
    BundleList.emplace_back("funclet", EHPad);

  return BundleList;
}

    bool HandleBinding(StoreManager &SMgr, Store S, const MemRegion *Region,
                       SVal Val) override {

      if (!isa<GlobalsSpaceRegion>(Region->getMemorySpace()))
        return true;
      const MemRegion *VR = Val.getAsRegion();
      if (VR && isa<StackSpaceRegion>(VR->getMemorySpace()) &&
          !isArcManagedBlock(VR, Ctx) && !isNotInCurrentFrame(VR, Ctx))
        V.emplace_back(Region, VR);
      return true;
    }

bool IRTranslator::translateInvoke(const User &U) {
  const InvokeInst &I = cast<InvokeInst>(U);
  MachineFunction &MF = MIRBuilder.getMF();
  MachineModuleInfo &MMI = MF.getMMI();

  const BasicBlock *ReturnBB = I.getSuccessor(0);
  const BasicBlock *EHPadBB = I.getSuccessor(1);

  const Value *Callee(I.getCalledValue());
  const Function *Fn = dyn_cast<Function>(Callee);
  if (isa<InlineAsm>(Callee))
    return false;

  // FIXME: support invoking patchpoint and statepoint intrinsics.
  if (Fn && Fn->isIntrinsic())
    return false;

  // FIXME: support whatever these are.
  if (I.countOperandBundlesOfType(LLVMContext::OB_deopt))
    return false;

  // FIXME: support Windows exception handling.
  if (!isa<LandingPadInst>(EHPadBB->front()))
    return false;


  // Emit the actual call, bracketed by EH_LABELs so that the MMI knows about
  // the region covered by the try.
  MCSymbol *BeginSymbol = MMI.getContext().createTempSymbol();
  MIRBuilder.buildInstr(TargetOpcode::EH_LABEL).addSym(BeginSymbol);

  unsigned Res = I.getType()->isVoidTy() ? 0 : getOrCreateVReg(I);
  SmallVector<CallLowering::ArgInfo, 8> Args;
  for (auto &Arg: I.arg_operands())
    Args.emplace_back(getOrCreateVReg(*Arg), Arg->getType());

  if (!CLI->lowerCall(MIRBuilder, MachineOperand::CreateGA(Fn, 0),
                      CallLowering::ArgInfo(Res, I.getType()), Args))
    return false;

  MCSymbol *EndSymbol = MMI.getContext().createTempSymbol();
  MIRBuilder.buildInstr(TargetOpcode::EH_LABEL).addSym(EndSymbol);

  // FIXME: track probabilities.
  MachineBasicBlock &EHPadMBB = getOrCreateBB(*EHPadBB),
                    &ReturnMBB = getOrCreateBB(*ReturnBB);
  MMI.addInvoke(&EHPadMBB, BeginSymbol, EndSymbol);
  MIRBuilder.getMBB().addSuccessor(&ReturnMBB);
  MIRBuilder.getMBB().addSuccessor(&EHPadMBB);

  return true;
}

/// Create a call instruction with the correct funclet token. Should be used
/// instead of calling CallInst::Create directly.
static CallInst *
createCallInst(FunctionType *FTy, Value *Func, ArrayRef<Value *> Args,
               const Twine &NameStr, Instruction *InsertBefore,
               const DenseMap<BasicBlock *, ColorVector> &BlockColors) {
  SmallVector<OperandBundleDef, 1> OpBundles;
  if (!BlockColors.empty()) {
    const ColorVector &CV = BlockColors.find(InsertBefore->getParent())->second;
    assert(CV.size() == 1 && "non-unique color for block!");
    Instruction *EHPad = CV.front()->getFirstNonPHI();
    if (EHPad->isEHPad())
      OpBundles.emplace_back("funclet", EHPad);
  }

  return CallInst::Create(FTy, Func, Args, OpBundles, NameStr, InsertBefore);
}