/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Sema/SemaOpenMP.cpp

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//===--- SemaOpenMP.cpp - Semantic Analysis for OpenMP constructs ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements semantic analysis for OpenMP directives and
/// clauses.
///
//===----------------------------------------------------------------------===//

#include "TreeTransform.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/AST/CXXInheritance.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclOpenMP.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/AST/TypeOrdering.h"
#include "clang/Basic/DiagnosticSema.h"
#include "clang/Basic/OpenMPKinds.h"
#include "clang/Basic/PartialDiagnostic.h"
#include "clang/Sema/Initialization.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/SemaInternal.h"
#include "llvm/ADT/IndexedMap.h"
#include "llvm/ADT/PointerEmbeddedInt.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Frontend/OpenMP/OMPConstants.h"
using namespace clang;
using namespace llvm::omp;

//===----------------------------------------------------------------------===//
// Stack of data-sharing attributes for variables
//===----------------------------------------------------------------------===//

static const Expr *checkMapClauseExpressionBase(
    Sema &SemaRef, Expr *E,
    OMPClauseMappableExprCommon::MappableExprComponentList &CurComponents,
    OpenMPClauseKind CKind, bool NoDiagnose);

namespace {
/// Default data sharing attributes, which can be applied to directive.
enum DefaultDataSharingAttributes {
  DSA_unspecified = 0, /// Data sharing attribute not specified.
  DSA_none = 1 << 0,   /// Default data sharing attribute 'none'.
  DSA_shared = 1 << 1, /// Default data sharing attribute 'shared'.
};

/// Stack for tracking declarations used in OpenMP directives and
/// clauses and their data-sharing attributes.
class DSAStackTy {
public:
  struct DSAVarData {
    OpenMPDirectiveKind DKind = OMPD_unknown;
    OpenMPClauseKind CKind = OMPC_unknown;
    const Expr *RefExpr = nullptr;
    DeclRefExpr *PrivateCopy = nullptr;
    SourceLocation ImplicitDSALoc;
    DSAVarData() = default;
    DSAVarData(OpenMPDirectiveKind DKind, OpenMPClauseKind CKind,
               const Expr *RefExpr, DeclRefExpr *PrivateCopy,
               SourceLocation ImplicitDSALoc)
        : DKind(DKind), CKind(CKind), RefExpr(RefExpr),
          PrivateCopy(PrivateCopy), ImplicitDSALoc(ImplicitDSALoc) {}
  };
  using OperatorOffsetTy =
      llvm::SmallVector<std::pair<Expr *, OverloadedOperatorKind>, 4>;
  using DoacrossDependMapTy =
      llvm::DenseMap<OMPDependClause *, OperatorOffsetTy>;

private:
  struct DSAInfo {
    OpenMPClauseKind Attributes = OMPC_unknown;
    /// Pointer to a reference expression and a flag which shows that the
    /// variable is marked as lastprivate(true) or not (false).
    llvm::PointerIntPair<const Expr *, 1, bool> RefExpr;
    DeclRefExpr *PrivateCopy = nullptr;
  };
  using DeclSAMapTy = llvm::SmallDenseMap<const ValueDecl *, DSAInfo, 8>;
  using UsedRefMapTy = llvm::SmallDenseMap<const ValueDecl *, const Expr *, 8>;
  using LCDeclInfo = std::pair<unsigned, VarDecl *>;
  using LoopControlVariablesMapTy =
      llvm::SmallDenseMap<const ValueDecl *, LCDeclInfo, 8>;
  /// Struct that associates a component with the clause kind where they are
  /// found.
  struct MappedExprComponentTy {
    OMPClauseMappableExprCommon::MappableExprComponentLists Components;
    OpenMPClauseKind Kind = OMPC_unknown;
  };
  using MappedExprComponentsTy =
      llvm::DenseMap<const ValueDecl *, MappedExprComponentTy>;
  using CriticalsWithHintsTy =
      llvm::StringMap<std::pair<const OMPCriticalDirective *, llvm::APSInt>>;
  struct ReductionData {
    using BOKPtrType = llvm::PointerEmbeddedInt<BinaryOperatorKind, 16>;
    SourceRange ReductionRange;
    llvm::PointerUnion<const Expr *, BOKPtrType> ReductionOp;
    ReductionData() = default;
    void set(BinaryOperatorKind BO, SourceRange RR) {
      ReductionRange = RR;
      ReductionOp = BO;
    }
    void set(const Expr *RefExpr, SourceRange RR) {
      ReductionRange = RR;
      ReductionOp = RefExpr;
    }
  };
  using DeclReductionMapTy =
      llvm::SmallDenseMap<const ValueDecl *, ReductionData, 4>;
  struct DefaultmapInfo {
    OpenMPDefaultmapClauseModifier ImplicitBehavior =
        OMPC_DEFAULTMAP_MODIFIER_unknown;
    SourceLocation SLoc;
    DefaultmapInfo() = default;
    DefaultmapInfo(OpenMPDefaultmapClauseModifier M, SourceLocation Loc)
        : ImplicitBehavior(M), SLoc(Loc) {}
  };

  struct SharingMapTy {
    DeclSAMapTy SharingMap;
    DeclReductionMapTy ReductionMap;
    UsedRefMapTy AlignedMap;
    UsedRefMapTy NontemporalMap;
    MappedExprComponentsTy MappedExprComponents;
    LoopControlVariablesMapTy LCVMap;
    DefaultDataSharingAttributes DefaultAttr = DSA_unspecified;
    SourceLocation DefaultAttrLoc;
    DefaultmapInfo DefaultmapMap[OMPC_DEFAULTMAP_unknown];
    OpenMPDirectiveKind Directive = OMPD_unknown;
    DeclarationNameInfo DirectiveName;
    Scope *CurScope = nullptr;
    SourceLocation ConstructLoc;
    /// Set of 'depend' clauses with 'sink|source' dependence kind. Required to
    /// get the data (loop counters etc.) about enclosing loop-based construct.
    /// This data is required during codegen.
    DoacrossDependMapTy DoacrossDepends;
    /// First argument (Expr *) contains optional argument of the
    /// 'ordered' clause, the second one is true if the regions has 'ordered'
    /// clause, false otherwise.
    llvm::Optional<std::pair<const Expr *, OMPOrderedClause *>> OrderedRegion;
    unsigned AssociatedLoops = 1;
    bool HasMutipleLoops = false;
    const Decl *PossiblyLoopCounter = nullptr;
    bool NowaitRegion = false;
    bool CancelRegion = false;
    bool LoopStart = false;
    bool BodyComplete = false;
    SourceLocation InnerTeamsRegionLoc;
    /// Reference to the taskgroup task_reduction reference expression.
    Expr *TaskgroupReductionRef = nullptr;
    llvm::DenseSet<QualType> MappedClassesQualTypes;
    SmallVector<Expr *, 4> InnerUsedAllocators;
    /// List of globals marked as declare target link in this target region
    /// (isOpenMPTargetExecutionDirective(Directive) == true).
    llvm::SmallVector<DeclRefExpr *, 4> DeclareTargetLinkVarDecls;
    SharingMapTy(OpenMPDirectiveKind DKind, DeclarationNameInfo Name,
                 Scope *CurScope, SourceLocation Loc)
        : Directive(DKind), DirectiveName(Name), CurScope(CurScope),
          ConstructLoc(Loc) {}
    SharingMapTy() = default;
  };

  using StackTy = SmallVector<SharingMapTy, 4>;

  /// Stack of used declaration and their data-sharing attributes.
  DeclSAMapTy Threadprivates;
  const FunctionScopeInfo *CurrentNonCapturingFunctionScope = nullptr;
  SmallVector<std::pair<StackTy, const FunctionScopeInfo *>, 4> Stack;
  /// true, if check for DSA must be from parent directive, false, if
  /// from current directive.
  OpenMPClauseKind ClauseKindMode = OMPC_unknown;
  Sema &SemaRef;
  bool ForceCapturing = false;
  /// true if all the variables in the target executable directives must be
  /// captured by reference.
  bool ForceCaptureByReferenceInTargetExecutable = false;
  CriticalsWithHintsTy Criticals;
  unsigned IgnoredStackElements = 0;

  /// Iterators over the stack iterate in order from innermost to outermost
  /// directive.
  using const_iterator = StackTy::const_reverse_iterator;
  const_iterator begin() const {
    return Stack.empty() ? const_iterator()12.3k
                         : Stack.back().first.rbegin() + IgnoredStackElements739k;
  }
  const_iterator end() const {
    return Stack.empty() ? const_iterator()12.3k : Stack.back().first.rend()4.79M;
  }
  using iterator = StackTy::reverse_iterator;
  iterator begin() {
    return Stack.empty() ? iterator()0
                         : Stack.back().first.rbegin() + IgnoredStackElements;
  }
  iterator end() {
    return Stack.empty() ? iterator()0 : Stack.back().first.rend();
  }

  // Convenience operations to get at the elements of the stack.

  bool isStackEmpty() const {
    return Stack.empty() ||
           Stack.back().second != CurrentNonCapturingFunctionScope45.5M ||
           Stack.back().first.size() <= IgnoredStackElements45.5M;
  }
  size_t getStackSize() const {
    return isStackEmpty() ? 0209k
                          : Stack.back().first.size() - IgnoredStackElements32.0M;
  }

  SharingMapTy *getTopOfStackOrNull() {
    size_t Size = getStackSize();
    if (Size == 0)
      return nullptr;
    return &Stack.back().first[Size - 1];
  }
  const SharingMapTy *getTopOfStackOrNull() const {
    return const_cast<DSAStackTy&>(*this).getTopOfStackOrNull();
  }
  SharingMapTy &getTopOfStack() {
    assert(!isStackEmpty() && "no current directive");
    return *getTopOfStackOrNull();
  }
  const SharingMapTy &getTopOfStack() const {
    return const_cast<DSAStackTy&>(*this).getTopOfStack();
  }

  SharingMapTy *getSecondOnStackOrNull() {
    size_t Size = getStackSize();
    if (Size <= 1)
      return nullptr;
    return &Stack.back().first[Size - 2];
  }
  const SharingMapTy *getSecondOnStackOrNull() const {
    return const_cast<DSAStackTy&>(*this).getSecondOnStackOrNull();
  }

  /// Get the stack element at a certain level (previously returned by
  /// \c getNestingLevel).
  ///
  /// Note that nesting levels count from outermost to innermost, and this is
  /// the reverse of our iteration order where new inner levels are pushed at
  /// the front of the stack.
  SharingMapTy &getStackElemAtLevel(unsigned Level) {
    assert(Level < getStackSize() && "no such stack element");
    return Stack.back().first[Level];
  }
  const SharingMapTy &getStackElemAtLevel(unsigned Level) const {
    return const_cast<DSAStackTy&>(*this).getStackElemAtLevel(Level);
  }

  DSAVarData getDSA(const_iterator &Iter, ValueDecl *D) const;

  /// Checks if the variable is a local for OpenMP region.
  bool isOpenMPLocal(VarDecl *D, const_iterator Iter) const;

  /// Vector of previously declared requires directives
  SmallVector<const OMPRequiresDecl *, 2> RequiresDecls;
  /// omp_allocator_handle_t type.
  QualType OMPAllocatorHandleT;
  /// Expression for the predefined allocators.
  Expr *OMPPredefinedAllocators[OMPAllocateDeclAttr::OMPUserDefinedMemAlloc] = {
      nullptr};
  /// Vector of previously encountered target directives
  SmallVector<SourceLocation, 2> TargetLocations;
  SourceLocation AtomicLocation;

public:
  explicit DSAStackTy(Sema &S) : SemaRef(S) {}

  /// Sets omp_allocator_handle_t type.
  void setOMPAllocatorHandleT(QualType Ty) { OMPAllocatorHandleT = Ty; }
  /// Gets omp_allocator_handle_t type.
  QualType getOMPAllocatorHandleT() const { return OMPAllocatorHandleT; }
  /// Sets the given default allocator.
  void setAllocator(OMPAllocateDeclAttr::AllocatorTypeTy AllocatorKind,
                    Expr *Allocator) {
    OMPPredefinedAllocators[AllocatorKind] = Allocator;
  }
  /// Returns the specified default allocator.
  Expr *getAllocator(OMPAllocateDeclAttr::AllocatorTypeTy AllocatorKind) const {
    return OMPPredefinedAllocators[AllocatorKind];
  }

  bool isClauseParsingMode() const { return ClauseKindMode != OMPC_unknown; }
  OpenMPClauseKind getClauseParsingMode() const {
    assert(isClauseParsingMode() && "Must be in clause parsing mode.");
    return ClauseKindMode;
  }
  void setClauseParsingMode(OpenMPClauseKind K) { ClauseKindMode = K; }

  bool isBodyComplete() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top && Top->BodyComplete160k;
  }
  void setBodyComplete() {
    getTopOfStack().BodyComplete = true;
  }

  bool isForceVarCapturing() const { return ForceCapturing; }
  void setForceVarCapturing(bool V) { ForceCapturing = V; }

  void setForceCaptureByReferenceInTargetExecutable(bool V) {
    ForceCaptureByReferenceInTargetExecutable = V;
  }
  bool isForceCaptureByReferenceInTargetExecutable() const {
    return ForceCaptureByReferenceInTargetExecutable;
  }

  void push(OpenMPDirectiveKind DKind, const DeclarationNameInfo &DirName,
            Scope *CurScope, SourceLocation Loc) {
    assert(!IgnoredStackElements &&
           "cannot change stack while ignoring elements");
    if (Stack.empty() ||
        Stack.back().second != CurrentNonCapturingFunctionScope234k)
      Stack.emplace_back(StackTy(), CurrentNonCapturingFunctionScope);
    Stack.back().first.emplace_back(DKind, DirName, CurScope, Loc);
    Stack.back().first.back().DefaultAttrLoc = Loc;
  }

  void pop() {
    assert(!IgnoredStackElements &&
           "cannot change stack while ignoring elements");
    assert(!Stack.back().first.empty() &&
           "Data-sharing attributes stack is empty!");
    Stack.back().first.pop_back();
  }

  /// RAII object to temporarily leave the scope of a directive when we want to
  /// logically operate in its parent.
  class ParentDirectiveScope {
    DSAStackTy &Self;
    bool Active;
  public:
    ParentDirectiveScope(DSAStackTy &Self, bool Activate)
        : Self(Self), Active(false) {
      if (Activate)
        enable();
    }
    ~ParentDirectiveScope() { disable(); }
    void disable() {
      if (Active) {
        --Self.IgnoredStackElements;
        Active = false;
      }
    }
    void enable() {
      if (!Active) {
        ++Self.IgnoredStackElements;
        Active = true;
      }
    }
  };

  /// Marks that we're started loop parsing.
  void loopInit() {
    assert(isOpenMPLoopDirective(getCurrentDirective()) &&
           "Expected loop-based directive.");
    getTopOfStack().LoopStart = true;
  }
  /// Start capturing of the variables in the loop context.
  void loopStart() {
    assert(isOpenMPLoopDirective(getCurrentDirective()) &&
           "Expected loop-based directive.");
    getTopOfStack().LoopStart = false;
  }
  /// true, if variables are captured, false otherwise.
  bool isLoopStarted() const {
    assert(isOpenMPLoopDirective(getCurrentDirective()) &&
           "Expected loop-based directive.");
    return !getTopOfStack().LoopStart;
  }
  /// Marks (or clears) declaration as possibly loop counter.
  void resetPossibleLoopCounter(const Decl *D = nullptr) {
    getTopOfStack().PossiblyLoopCounter =
        D ? D->getCanonicalDecl()36.7k : D107k;
  }
  /// Gets the possible loop counter decl.
  const Decl *getPossiblyLoopCunter() const {
    return getTopOfStack().PossiblyLoopCounter;
  }
  /// Start new OpenMP region stack in new non-capturing function.
  void pushFunction() {
    assert(!IgnoredStackElements &&
           "cannot change stack while ignoring elements");
    const FunctionScopeInfo *CurFnScope = SemaRef.getCurFunction();
    assert(!isa<CapturingScopeInfo>(CurFnScope));
    CurrentNonCapturingFunctionScope = CurFnScope;
  }
  /// Pop region stack for non-capturing function.
  void popFunction(const FunctionScopeInfo *OldFSI) {
    assert(!IgnoredStackElements &&
           "cannot change stack while ignoring elements");
    if (!Stack.empty() && Stack.back().second == OldFSI455k) {
      assert(Stack.back().first.empty());
      Stack.pop_back();
    }
    CurrentNonCapturingFunctionScope = nullptr;
    for (const FunctionScopeInfo *FSI : llvm::reverse(SemaRef.FunctionScopes)) {
      if (!isa<CapturingScopeInfo>(FSI)) {
        CurrentNonCapturingFunctionScope = FSI;
        break;
      }
    }
  }

  void addCriticalWithHint(const OMPCriticalDirective *D, llvm::APSInt Hint) {
    Criticals.try_emplace(D->getDirectiveName().getAsString(), D, Hint);
  }
  const std::pair<const OMPCriticalDirective *, llvm::APSInt>
  getCriticalWithHint(const DeclarationNameInfo &Name) const {
    auto I = Criticals.find(Name.getAsString());
    if (I != Criticals.end())
      return I->second;
    return std::make_pair(nullptr, llvm::APSInt());
  }
  /// If 'aligned' declaration for given variable \a D was not seen yet,
  /// add it and return NULL; otherwise return previous occurrence's expression
  /// for diagnostics.
  const Expr *addUniqueAligned(const ValueDecl *D, const Expr *NewDE);
  /// If 'nontemporal' declaration for given variable \a D was not seen yet,
  /// add it and return NULL; otherwise return previous occurrence's expression
  /// for diagnostics.
  const Expr *addUniqueNontemporal(const ValueDecl *D, const Expr *NewDE);

  /// Register specified variable as loop control variable.
  void addLoopControlVariable(const ValueDecl *D, VarDecl *Capture);
  /// Check if the specified variable is a loop control variable for
  /// current region.
  /// \return The index of the loop control variable in the list of associated
  /// for-loops (from outer to inner).
  const LCDeclInfo isLoopControlVariable(const ValueDecl *D) const;
  /// Check if the specified variable is a loop control variable for
  /// parent region.
  /// \return The index of the loop control variable in the list of associated
  /// for-loops (from outer to inner).
  const LCDeclInfo isParentLoopControlVariable(const ValueDecl *D) const;
  /// Get the loop control variable for the I-th loop (or nullptr) in
  /// parent directive.
  const ValueDecl *getParentLoopControlVariable(unsigned I) const;

  /// Adds explicit data sharing attribute to the specified declaration.
  void addDSA(const ValueDecl *D, const Expr *E, OpenMPClauseKind A,
              DeclRefExpr *PrivateCopy = nullptr);

  /// Adds additional information for the reduction items with the reduction id
  /// represented as an operator.
  void addTaskgroupReductionData(const ValueDecl *D, SourceRange SR,
                                 BinaryOperatorKind BOK);
  /// Adds additional information for the reduction items with the reduction id
  /// represented as reduction identifier.
  void addTaskgroupReductionData(const ValueDecl *D, SourceRange SR,
                                 const Expr *ReductionRef);
  /// Returns the location and reduction operation from the innermost parent
  /// region for the given \p D.
  const DSAVarData
  getTopMostTaskgroupReductionData(const ValueDecl *D, SourceRange &SR,
                                   BinaryOperatorKind &BOK,
                                   Expr *&TaskgroupDescriptor) const;
  /// Returns the location and reduction operation from the innermost parent
  /// region for the given \p D.
  const DSAVarData
  getTopMostTaskgroupReductionData(const ValueDecl *D, SourceRange &SR,
                                   const Expr *&ReductionRef,
                                   Expr *&TaskgroupDescriptor) const;
  /// Return reduction reference expression for the current taskgroup.
  Expr *getTaskgroupReductionRef() const {
    assert(getTopOfStack().Directive == OMPD_taskgroup &&
           "taskgroup reference expression requested for non taskgroup "
           "directive.");
    return getTopOfStack().TaskgroupReductionRef;
  }
  /// Checks if the given \p VD declaration is actually a taskgroup reduction
  /// descriptor variable at the \p Level of OpenMP regions.
  bool isTaskgroupReductionRef(const ValueDecl *VD, unsigned Level) const {
    return getStackElemAtLevel(Level).TaskgroupReductionRef &&
           cast<DeclRefExpr>(getStackElemAtLevel(Level).TaskgroupReductionRef)
                   ->getDecl() == VD;
  }

  /// Returns data sharing attributes from top of the stack for the
  /// specified declaration.
  const DSAVarData getTopDSA(ValueDecl *D, bool FromParent);
  /// Returns data-sharing attributes for the specified declaration.
  const DSAVarData getImplicitDSA(ValueDecl *D, bool FromParent) const;
  /// Checks if the specified variables has data-sharing attributes which
  /// match specified \a CPred predicate in any directive which matches \a DPred
  /// predicate.
  const DSAVarData
  hasDSA(ValueDecl *D, const llvm::function_ref<bool(OpenMPClauseKind)> CPred,
         const llvm::function_ref<bool(OpenMPDirectiveKind)> DPred,
         bool FromParent) const;
  /// Checks if the specified variables has data-sharing attributes which
  /// match specified \a CPred predicate in any innermost directive which
  /// matches \a DPred predicate.
  const DSAVarData
  hasInnermostDSA(ValueDecl *D,
                  const llvm::function_ref<bool(OpenMPClauseKind)> CPred,
                  const llvm::function_ref<bool(OpenMPDirectiveKind)> DPred,
                  bool FromParent) const;
  /// Checks if the specified variables has explicit data-sharing
  /// attributes which match specified \a CPred predicate at the specified
  /// OpenMP region.
  bool hasExplicitDSA(const ValueDecl *D,
                      const llvm::function_ref<bool(OpenMPClauseKind)> CPred,
                      unsigned Level, bool NotLastprivate = false) const;

  /// Returns true if the directive at level \Level matches in the
  /// specified \a DPred predicate.
  bool hasExplicitDirective(
      const llvm::function_ref<bool(OpenMPDirectiveKind)> DPred,
      unsigned Level) const;

  /// Finds a directive which matches specified \a DPred predicate.
  bool hasDirective(
      const llvm::function_ref<bool(
          OpenMPDirectiveKind, const DeclarationNameInfo &, SourceLocation)>
          DPred,
      bool FromParent) const;

  /// Returns currently analyzed directive.
  OpenMPDirectiveKind getCurrentDirective() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->Directive7.94M : OMPD_unknown159k;
  }
  /// Returns directive kind at specified level.
  OpenMPDirectiveKind getDirective(unsigned Level) const {
    assert(!isStackEmpty() && "No directive at specified level.");
    return getStackElemAtLevel(Level).Directive;
  }
  /// Returns the capture region at the specified level.
  OpenMPDirectiveKind getCaptureRegion(unsigned Level,
                                       unsigned OpenMPCaptureLevel) const {
    SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
    getOpenMPCaptureRegions(CaptureRegions, getDirective(Level));
    return CaptureRegions[OpenMPCaptureLevel];
  }
  /// Returns parent directive.
  OpenMPDirectiveKind getParentDirective() const {
    const SharingMapTy *Parent = getSecondOnStackOrNull();
    return Parent ? Parent->Directive249k : OMPD_unknown123k;
  }

  /// Add requires decl to internal vector
  void addRequiresDecl(OMPRequiresDecl *RD) {
    RequiresDecls.push_back(RD);
  }

  /// Checks if the defined 'requires' directive has specified type of clause.
  template <typename ClauseType>
  bool hasRequiresDeclWithClause() const {
    return llvm::any_of(RequiresDecls, [](const OMPRequiresDecl *D) {
      return llvm::any_of(D->clauselists(), [](const OMPClause *C) {
        return isa<ClauseType>(C);
      });
    });
  }

  /// Checks for a duplicate clause amongst previously declared requires
  /// directives
  bool hasDuplicateRequiresClause(ArrayRef<OMPClause *> ClauseList) const {
    bool IsDuplicate = false;
    for (OMPClause *CNew : ClauseList) {
      for (const OMPRequiresDecl *D : RequiresDecls) {
        for (const OMPClause *CPrev : D->clauselists()) {
          if (CNew->getClauseKind() == CPrev->getClauseKind()) {
            SemaRef.Diag(CNew->getBeginLoc(),
                         diag::err_omp_requires_clause_redeclaration)
                << getOpenMPClauseName(CNew->getClauseKind());
            SemaRef.Diag(CPrev->getBeginLoc(),
                         diag::note_omp_requires_previous_clause)
                << getOpenMPClauseName(CPrev->getClauseKind());
            IsDuplicate = true;
          }
        }
      }
    }
    return IsDuplicate;
  }

  /// Add location of previously encountered target to internal vector
  void addTargetDirLocation(SourceLocation LocStart) {
    TargetLocations.push_back(LocStart);
  }

  /// Add location for the first encountered atomicc directive.
  void addAtomicDirectiveLoc(SourceLocation Loc) {
    if (AtomicLocation.isInvalid())
      AtomicLocation = Loc;
  }

  /// Returns the location of the first encountered atomic directive in the
  /// module.
  SourceLocation getAtomicDirectiveLoc() const {
    return AtomicLocation;
  }

  // Return previously encountered target region locations.
  ArrayRef<SourceLocation> getEncounteredTargetLocs() const {
    return TargetLocations;
  }

  /// Set default data sharing attribute to none.
  void setDefaultDSANone(SourceLocation Loc) {
    getTopOfStack().DefaultAttr = DSA_none;
    getTopOfStack().DefaultAttrLoc = Loc;
  }
  /// Set default data sharing attribute to shared.
  void setDefaultDSAShared(SourceLocation Loc) {
    getTopOfStack().DefaultAttr = DSA_shared;
    getTopOfStack().DefaultAttrLoc = Loc;
  }
  /// Set default data mapping attribute to Modifier:Kind
  void setDefaultDMAAttr(OpenMPDefaultmapClauseModifier M,
                         OpenMPDefaultmapClauseKind Kind,
                         SourceLocation Loc) {
    DefaultmapInfo &DMI = getTopOfStack().DefaultmapMap[Kind];
    DMI.ImplicitBehavior = M;
    DMI.SLoc = Loc;
  }
  /// Check whether the implicit-behavior has been set in defaultmap
  bool checkDefaultmapCategory(OpenMPDefaultmapClauseKind VariableCategory) {
    return getTopOfStack().DefaultmapMap[VariableCategory].ImplicitBehavior !=
           OMPC_DEFAULTMAP_MODIFIER_unknown;
  }

  DefaultDataSharingAttributes getDefaultDSA() const {
    return isStackEmpty() ? DSA_unspecified0
                          : getTopOfStack().DefaultAttr;
  }
  SourceLocation getDefaultDSALocation() const {
    return isStackEmpty() ? SourceLocation()0
                          : getTopOfStack().DefaultAttrLoc;
  }
  OpenMPDefaultmapClauseModifier
  getDefaultmapModifier(OpenMPDefaultmapClauseKind Kind) const {
    return isStackEmpty()
               ? OMPC_DEFAULTMAP_MODIFIER_unknown0
               : getTopOfStack().DefaultmapMap[Kind].ImplicitBehavior;
  }
  OpenMPDefaultmapClauseModifier
  getDefaultmapModifierAtLevel(unsigned Level,
                               OpenMPDefaultmapClauseKind Kind) const {
    return getStackElemAtLevel(Level).DefaultmapMap[Kind].ImplicitBehavior;
  }
  bool isDefaultmapCapturedByRef(unsigned Level,
                                 OpenMPDefaultmapClauseKind Kind) const {
    OpenMPDefaultmapClauseModifier M =
        getDefaultmapModifierAtLevel(Level, Kind);
    if (Kind == OMPC_DEFAULTMAP_scalar || Kind == OMPC_DEFAULTMAP_pointer4.52k) {
      return (M == OMPC_DEFAULTMAP_MODIFIER_alloc) ||
             (M == OMPC_DEFAULTMAP_MODIFIER_to)446k ||
             (M == OMPC_DEFAULTMAP_MODIFIER_from)446k ||
             (M == OMPC_DEFAULTMAP_MODIFIER_tofrom)445k;
    }
    return true;
  }
  static bool mustBeFirstprivateBase(OpenMPDefaultmapClauseModifier M,
                                     OpenMPDefaultmapClauseKind Kind) {
    switch (Kind) {
    case OMPC_DEFAULTMAP_scalar:
    case OMPC_DEFAULTMAP_pointer:
      return (M == OMPC_DEFAULTMAP_MODIFIER_unknown) ||
             (M == OMPC_DEFAULTMAP_MODIFIER_firstprivate)628 ||
             (M == OMPC_DEFAULTMAP_MODIFIER_default)580;
    case OMPC_DEFAULTMAP_aggregate:
      return M == OMPC_DEFAULTMAP_MODIFIER_firstprivate;
    default:
      break;
    }
    llvm_unreachable("Unexpected OpenMPDefaultmapClauseKind enum");
  }
  bool mustBeFirstprivateAtLevel(unsigned Level,
                                 OpenMPDefaultmapClauseKind Kind) const {
    OpenMPDefaultmapClauseModifier M =
        getDefaultmapModifierAtLevel(Level, Kind);
    return mustBeFirstprivateBase(M, Kind);
  }
  bool mustBeFirstprivate(OpenMPDefaultmapClauseKind Kind) const {
    OpenMPDefaultmapClauseModifier M = getDefaultmapModifier(Kind);
    return mustBeFirstprivateBase(M, Kind);
  }

  /// Checks if the specified variable is a threadprivate.
  bool isThreadPrivate(VarDecl *D) {
    const DSAVarData DVar = getTopDSA(D, false);
    return isOpenMPThreadPrivate(DVar.CKind);
  }

  /// Marks current region as ordered (it has an 'ordered' clause).
  void setOrderedRegion(bool IsOrdered, const Expr *Param,
                        OMPOrderedClause *Clause) {
    if (IsOrdered)
      getTopOfStack().OrderedRegion.emplace(Param, Clause);
    else
      getTopOfStack().OrderedRegion.reset();
  }
  /// Returns true, if region is ordered (has associated 'ordered' clause),
  /// false - otherwise.
  bool isOrderedRegion() const {
    if (const SharingMapTy *Top = getTopOfStackOrNull())
      return Top->OrderedRegion.hasValue();
    return false;
  }
  /// Returns optional parameter for the ordered region.
  std::pair<const Expr *, OMPOrderedClause *> getOrderedRegionParam() const {
    if (const SharingMapTy *Top = getTopOfStackOrNull())
      if (Top->OrderedRegion.hasValue())
        return Top->OrderedRegion.getValue();
    return std::make_pair(nullptr, nullptr);
  }
  /// Returns true, if parent region is ordered (has associated
  /// 'ordered' clause), false - otherwise.
  bool isParentOrderedRegion() const {
    if (const SharingMapTy *Parent = getSecondOnStackOrNull())
      return Parent->OrderedRegion.hasValue();
    return false;
  }
  /// Returns optional parameter for the ordered region.
  std::pair<const Expr *, OMPOrderedClause *>
  getParentOrderedRegionParam() const {
    if (const SharingMapTy *Parent = getSecondOnStackOrNull())
      if (Parent->OrderedRegion.hasValue())
        return Parent->OrderedRegion.getValue();
    return std::make_pair(nullptr, nullptr);
  }
  /// Marks current region as nowait (it has a 'nowait' clause).
  void setNowaitRegion(bool IsNowait = true) {
    getTopOfStack().NowaitRegion = IsNowait;
  }
  /// Returns true, if parent region is nowait (has associated
  /// 'nowait' clause), false - otherwise.
  bool isParentNowaitRegion() const {
    if (const SharingMapTy *Parent = getSecondOnStackOrNull())
      return Parent->NowaitRegion;
    return false;
  }
  /// Marks parent region as cancel region.
  void setParentCancelRegion(bool Cancel = true) {
    if (SharingMapTy *Parent = getSecondOnStackOrNull())
      Parent->CancelRegion |= Cancel;
  }
  /// Return true if current region has inner cancel construct.
  bool isCancelRegion() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->CancelRegion : false0;
  }

  /// Set collapse value for the region.
  void setAssociatedLoops(unsigned Val) {
    getTopOfStack().AssociatedLoops = Val;
    if (Val > 1)
      getTopOfStack().HasMutipleLoops = true;
  }
  /// Return collapse value for region.
  unsigned getAssociatedLoops() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->AssociatedLoops1.19M : 0287;
  }
  /// Returns true if the construct is associated with multiple loops.
  bool hasMutipleLoops() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->HasMutipleLoops : false0;
  }

  /// Marks current target region as one with closely nested teams
  /// region.
  void setParentTeamsRegionLoc(SourceLocation TeamsRegionLoc) {
    if (SharingMapTy *Parent = getSecondOnStackOrNull())
      Parent->InnerTeamsRegionLoc = TeamsRegionLoc;
  }
  /// Returns true, if current region has closely nested teams region.
  bool hasInnerTeamsRegion() const {
    return getInnerTeamsRegionLoc().isValid();
  }
  /// Returns location of the nested teams region (if any).
  SourceLocation getInnerTeamsRegionLoc() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->InnerTeamsRegionLoc : SourceLocation()0;
  }

  Scope *getCurScope() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->CurScope : nullptr0;
  }
  SourceLocation getConstructLoc() const {
    const SharingMapTy *Top = getTopOfStackOrNull();
    return Top ? Top->ConstructLoc : SourceLocation()0;
  }

  /// Do the check specified in \a Check to all component lists and return true
  /// if any issue is found.
  bool checkMappableExprComponentListsForDecl(
      const ValueDecl *VD, bool CurrentRegionOnly,
      const llvm::function_ref<
          bool(OMPClauseMappableExprCommon::MappableExprComponentListRef,
               OpenMPClauseKind)>
          Check) const {
    if (isStackEmpty())
      return false;
    auto SI = begin();
    auto SE = end();

    if (SI == SE)
      return false;

    if (CurrentRegionOnly)
      SE = std::next(SI);
    else
      std::advance(SI, 1);

    for (; SI != SE; ++SI181k) {
      auto MI = SI->MappedExprComponents.find(VD);
      if (MI != SI->MappedExprComponents.end())
        for (OMPClauseMappableExprCommon::MappableExprComponentListRef L :
             MI->second.Components)
          if (Check(L, MI->second.Kind))
            return true;
    }
    return false200k;
  }

  /// Do the check specified in \a Check to all component lists at a given level
  /// and return true if any issue is found.
  bool checkMappableExprComponentListsForDeclAtLevel(
      const ValueDecl *VD, unsigned Level,
      const llvm::function_ref<
          bool(OMPClauseMappableExprCommon::MappableExprComponentListRef,
               OpenMPClauseKind)>
          Check) const {
    if (getStackSize() <= Level)
      return false;

    const SharingMapTy &StackElem = getStackElemAtLevel(Level);
    auto MI = StackElem.MappedExprComponents.find(VD);
    if (MI != StackElem.MappedExprComponents.end())
      for (OMPClauseMappableExprCommon::MappableExprComponentListRef L :
           MI->second.Components)
        if (Check(L, MI->second.Kind))
          return true;
    return false891k;
  }

  /// Create a new mappable expression component list associated with a given
  /// declaration and initialize it with the provided list of components.
  void addMappableExpressionComponents(
      const ValueDecl *VD,
      OMPClauseMappableExprCommon::MappableExprComponentListRef Components,
      OpenMPClauseKind WhereFoundClauseKind) {
    MappedExprComponentTy &MEC = getTopOfStack().MappedExprComponents[VD];
    // Create new entry and append the new components there.
    MEC.Components.resize(MEC.Components.size() + 1);
    MEC.Components.back().append(Components.begin(), Components.end());
    MEC.Kind = WhereFoundClauseKind;
  }

  unsigned getNestingLevel() const {
    assert(!isStackEmpty());
    return getStackSize() - 1;
  }
  void addDoacrossDependClause(OMPDependClause *C,
                               const OperatorOffsetTy &OpsOffs) {
    SharingMapTy *Parent = getSecondOnStackOrNull();
    assert(Parent && isOpenMPWorksharingDirective(Parent->Directive));
    Parent->DoacrossDepends.try_emplace(C, OpsOffs);
  }
  llvm::iterator_range<DoacrossDependMapTy::const_iterator>
  getDoacrossDependClauses() const {
    const SharingMapTy &StackElem = getTopOfStack();
    if (isOpenMPWorksharingDirective(StackElem.Directive)) {
      const DoacrossDependMapTy &Ref = StackElem.DoacrossDepends;
      return llvm::make_range(Ref.begin(), Ref.end());
    }
    return llvm::make_range(StackElem.DoacrossDepends.end(),
                            StackElem.DoacrossDepends.end());
  }

  // Store types of classes which have been explicitly mapped
  void addMappedClassesQualTypes(QualType QT) {
    SharingMapTy &StackElem = getTopOfStack();
    StackElem.MappedClassesQualTypes.insert(QT);
  }

  // Return set of mapped classes types
  bool isClassPreviouslyMapped(QualType QT) const {
    const SharingMapTy &StackElem = getTopOfStack();
    return StackElem.MappedClassesQualTypes.count(QT) != 0;
  }

  /// Adds global declare target to the parent target region.
  void addToParentTargetRegionLinkGlobals(DeclRefExpr *E) {
    assert(*OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(
               E->getDecl()) == OMPDeclareTargetDeclAttr::MT_Link &&
           "Expected declare target link global.");
    for (auto &Elem : *this) {
      if (isOpenMPTargetExecutionDirective(Elem.Directive)) {
        Elem.DeclareTargetLinkVarDecls.push_back(E);
        return;
      }
    }
  }

  /// Returns the list of globals with declare target link if current directive
  /// is target.
  ArrayRef<DeclRefExpr *> getLinkGlobals() const {
    assert(isOpenMPTargetExecutionDirective(getCurrentDirective()) &&
           "Expected target executable directive.");
    return getTopOfStack().DeclareTargetLinkVarDecls;
  }

  /// Adds list of allocators expressions.
  void addInnerAllocatorExpr(Expr *E) {
    getTopOfStack().InnerUsedAllocators.push_back(E);
  }
  /// Return list of used allocators.
  ArrayRef<Expr *> getInnerAllocators() const {
    return getTopOfStack().InnerUsedAllocators;
  }
};

bool isImplicitTaskingRegion(OpenMPDirectiveKind DKind) {
  return isOpenMPParallelDirective(DKind) || isOpenMPTeamsDirective(DKind)3.07M;
}

bool isImplicitOrExplicitTaskingRegion(OpenMPDirectiveKind DKind) {
  return isImplicitTaskingRegion(DKind) || isOpenMPTaskingDirective(DKind)2.20M ||
         DKind == OMPD_unknown1.64M;
}

} // namespace

static const Expr *getExprAsWritten(const Expr *E) {
  if (const auto *FE = dyn_cast<FullExpr>(E))
    E = FE->getSubExpr();

  if (const auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
    E = MTE->getSubExpr();

  while (const auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
    E = Binder->getSubExpr();

  if (const auto *ICE = dyn_cast<ImplicitCastExpr>(E))
    E = ICE->getSubExprAsWritten();
  return E->IgnoreParens();
}

static Expr *getExprAsWritten(Expr *E) {
  return const_cast<Expr *>(getExprAsWritten(const_cast<const Expr *>(E)));
}

static const ValueDecl *getCanonicalDecl(const ValueDecl *D) {
  if (const auto *CED = dyn_cast<OMPCapturedExprDecl>(D))
    if (const auto *ME = dyn_cast<MemberExpr>(getExprAsWritten(CED->getInit())))
      D = ME->getMemberDecl();
  const auto *VD = dyn_cast<VarDecl>(D);
  const auto *FD = dyn_cast<FieldDecl>(D);
  if (VD != nullptr) {
    VD = VD->getCanonicalDecl();
    D = VD;
  } else {
    assert(FD);
    FD = FD->getCanonicalDecl();
    D = FD;
  }
  return D;
}

static ValueDecl *getCanonicalDecl(ValueDecl *D) {
  return const_cast<ValueDecl *>(
      getCanonicalDecl(const_cast<const ValueDecl *>(D)));
}

DSAStackTy::DSAVarData DSAStackTy::getDSA(const_iterator &Iter,
                                          ValueDecl *D) const {
  D = getCanonicalDecl(D);
  auto *VD = dyn_cast<VarDecl>(D);
  const auto *FD = dyn_cast<FieldDecl>(D);
  DSAVarData DVar;
  if (Iter == end()) {
    // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
    // in a region but not in construct]
    //  File-scope or namespace-scope variables referenced in called routines
    //  in the region are shared unless they appear in a threadprivate
    //  directive.
    if (VD && !VD->isFunctionOrMethodVarDecl()748k && !isa<ParmVarDecl>(VD)580k)
      DVar.CKind = OMPC_shared;

    // OpenMP [2.9.1.2, Data-sharing Attribute Rules for Variables Referenced
    // in a region but not in construct]
    //  Variables with static storage duration that are declared in called
    //  routines in the region are shared.
    if (VD && VD->hasGlobalStorage()748k)
      DVar.CKind = OMPC_shared;

    // Non-static data members are shared by default.
    if (FD)
      DVar.CKind = OMPC_shared;

    return DVar;
  }

  // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
  // in a Construct, C/C++, predetermined, p.1]
  // Variables with automatic storage duration that are declared in a scope
  // inside the construct are private.
  if (VD && isOpenMPLocal(VD, Iter)1.39M && VD->isLocalVarDecl()928 &&
      (928VD->getStorageClass() == SC_Auto928 || VD->getStorageClass() == SC_None928)) {
    DVar.CKind = OMPC_private;
    return DVar;
  }

  DVar.DKind = Iter->Directive;
  // Explicitly specified attributes and local variables with predetermined
  // attributes.
  if (Iter->SharingMap.count(D)) {
    const DSAInfo &Data = Iter->SharingMap.lookup(D);
    DVar.RefExpr = Data.RefExpr.getPointer();
    DVar.PrivateCopy = Data.PrivateCopy;
    DVar.CKind = Data.Attributes;
    DVar.ImplicitDSALoc = Iter->DefaultAttrLoc;
    return DVar;
  }

  // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
  // in a Construct, C/C++, implicitly determined, p.1]
  //  In a parallel or task construct, the data-sharing attributes of these
  //  variables are determined by the default clause, if present.
  switch (Iter->DefaultAttr) {
  case DSA_shared:
    DVar.CKind = OMPC_shared;
    DVar.ImplicitDSALoc = Iter->DefaultAttrLoc;
    return DVar;
  case DSA_none:
    return DVar;
  case DSA_unspecified:
    // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
    // in a Construct, implicitly determined, p.2]
    //  In a parallel construct, if no default clause is present, these
    //  variables are shared.
    DVar.ImplicitDSALoc = Iter->DefaultAttrLoc;
    if ((isOpenMPParallelDirective(DVar.DKind) &&
         !isOpenMPTaskLoopDirective(DVar.DKind)158k) ||
        isOpenMPTeamsDirective(DVar.DKind)1.24M) {
      DVar.CKind = OMPC_shared;
      return DVar;
    }

    // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
    // in a Construct, implicitly determined, p.4]
    //  In a task construct, if no default clause is present, a variable that in
    //  the enclosing context is determined to be shared by all implicit tasks
    //  bound to the current team is shared.
    if (isOpenMPTaskingDirective(DVar.DKind)) {
      DSAVarData DVarTemp;
      const_iterator I = Iter, E = end();
      do {
        ++I;
        // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables
        // Referenced in a Construct, implicitly determined, p.6]
        //  In a task construct, if no default clause is present, a variable
        //  whose data-sharing attribute is not determined by the rules above is
        //  firstprivate.
        DVarTemp = getDSA(I, D);
        if (DVarTemp.CKind != OMPC_shared) {
          DVar.RefExpr = nullptr;
          DVar.CKind = OMPC_firstprivate;
          return DVar;
        }
      } while (I != E && !isImplicitTaskingRegion(I->Directive)483k);
      DVar.CKind =
          (DVarTemp.CKind == OMPC_unknown) ? OMPC_firstprivate0 : OMPC_shared;
      return DVar;
    }
  }
  // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
  // in a Construct, implicitly determined, p.3]
  //  For constructs other than task, if no default clause is present, these
  //  variables inherit their data-sharing attributes from the enclosing
  //  context.
  return getDSA(++Iter, D);
}

const Expr *DSAStackTy::addUniqueAligned(const ValueDecl *D,
                                         const Expr *NewDE) {
  assert(!isStackEmpty() && "Data sharing attributes stack is empty");
  D = getCanonicalDecl(D);
  SharingMapTy &StackElem = getTopOfStack();
  auto It = StackElem.AlignedMap.find(D);
  if (It == StackElem.AlignedMap.end()) {
    assert(NewDE && "Unexpected nullptr expr to be added into aligned map");
    StackElem.AlignedMap[D] = NewDE;
    return nullptr;
  }
  assert(It->second && "Unexpected nullptr expr in the aligned map");
  return It->second;
}

const Expr *DSAStackTy::addUniqueNontemporal(const ValueDecl *D,
                                             const Expr *NewDE) {
  assert(!isStackEmpty() && "Data sharing attributes stack is empty");
  D = getCanonicalDecl(D);
  SharingMapTy &StackElem = getTopOfStack();
  auto It = StackElem.NontemporalMap.find(D);
  if (It == StackElem.NontemporalMap.end()) {
    assert(NewDE && "Unexpected nullptr expr to be added into aligned map");
    StackElem.NontemporalMap[D] = NewDE;
    return nullptr;
  }
  assert(It->second && "Unexpected nullptr expr in the aligned map");
  return It->second;
}

void DSAStackTy::addLoopControlVariable(const ValueDecl *D, VarDecl *Capture) {
  assert(!isStackEmpty() && "Data-sharing attributes stack is empty");
  D = getCanonicalDecl(D);
  SharingMapTy &StackElem = getTopOfStack();
  StackElem.LCVMap.try_emplace(
      D, LCDeclInfo(StackElem.LCVMap.size() + 1, Capture));
}

const DSAStackTy::LCDeclInfo
DSAStackTy::isLoopControlVariable(const ValueDecl *D) const {
  assert(!isStackEmpty() && "Data-sharing attributes stack is empty");
  D = getCanonicalDecl(D);
  const SharingMapTy &StackElem = getTopOfStack();
  auto It = StackElem.LCVMap.find(D);
  if (It != StackElem.LCVMap.end())
    return It->second;
  return {0, nullptr};
}

const DSAStackTy::LCDeclInfo
DSAStackTy::isParentLoopControlVariable(const ValueDecl *D) const {
  const SharingMapTy *Parent = getSecondOnStackOrNull();
  assert(Parent && "Data-sharing attributes stack is empty");
  D = getCanonicalDecl(D);
  auto It = Parent->LCVMap.find(D);
  if (It != Parent->LCVMap.end())
    return It->second;
  return {0, nullptr};
}

const ValueDecl *DSAStackTy::getParentLoopControlVariable(unsigned I) const {
  const SharingMapTy *Parent = getSecondOnStackOrNull();
  assert(Parent && "Data-sharing attributes stack is empty");
  if (Parent->LCVMap.size() < I)
    return nullptr;
  for (const auto &Pair : Parent->LCVMap)
    if (Pair.second.first == I)
      return Pair.first;
  return nullptr0;
}

void DSAStackTy::addDSA(const ValueDecl *D, const Expr *E, OpenMPClauseKind A,
                        DeclRefExpr *PrivateCopy) {
  D = getCanonicalDecl(D);
  if (A == OMPC_threadprivate) {
    DSAInfo &Data = Threadprivates[D];
    Data.Attributes = A;
    Data.RefExpr.setPointer(E);
    Data.PrivateCopy = nullptr;
  } else {
    DSAInfo &Data = getTopOfStack().SharingMap[D];
    assert(Data.Attributes == OMPC_unknown || (A == Data.Attributes) ||
           (A == OMPC_firstprivate && Data.Attributes == OMPC_lastprivate) ||
           (A == OMPC_lastprivate && Data.Attributes == OMPC_firstprivate) ||
           (isLoopControlVariable(D).first && A == OMPC_private));
    if (A == OMPC_lastprivate && Data.Attributes == OMPC_firstprivate10.5k) {
      Data.RefExpr.setInt(/*IntVal=*/true);
      return;
    }
    const bool IsLastprivate =
        A == OMPC_lastprivate || Data.Attributes == OMPC_lastprivate208k;
    Data.Attributes = A;
    Data.RefExpr.setPointerAndInt(E, IsLastprivate);
    Data.PrivateCopy = PrivateCopy;
    if (PrivateCopy) {
      DSAInfo &Data = getTopOfStack().SharingMap[PrivateCopy->getDecl()];
      Data.Attributes = A;
      Data.RefExpr.setPointerAndInt(PrivateCopy, IsLastprivate);
      Data.PrivateCopy = nullptr;
    }
  }
}

/// Build a variable declaration for OpenMP loop iteration variable.
static VarDecl *buildVarDecl(Sema &SemaRef, SourceLocation Loc, QualType Type,
                             StringRef Name, const AttrVec *Attrs = nullptr,
                             DeclRefExpr *OrigRef = nullptr) {
  DeclContext *DC = SemaRef.CurContext;
  IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name);
  TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc);
  auto *Decl =
      VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, TInfo, SC_None);
  if (Attrs) {
    for (specific_attr_iterator<AlignedAttr> I(Attrs->begin()), E(Attrs->end());
         I != E; ++I624)
      Decl->addAttr(*I);
  }
  Decl->setImplicit();
  if (OrigRef) {
    Decl->addAttr(
        OMPReferencedVarAttr::CreateImplicit(SemaRef.Context, OrigRef));
  }
  return Decl;
}

static DeclRefExpr *buildDeclRefExpr(Sema &S, VarDecl *D, QualType Ty,
                                     SourceLocation Loc,
                                     bool RefersToCapture = false) {
  D->setReferenced();
  D->markUsed(S.Context);
  return DeclRefExpr::Create(S.getASTContext(), NestedNameSpecifierLoc(),
                             SourceLocation(), D, RefersToCapture, Loc, Ty,
                             VK_LValue);
}

void DSAStackTy::addTaskgroupReductionData(const ValueDecl *D, SourceRange SR,
                                           BinaryOperatorKind BOK) {
  D = getCanonicalDecl(D);
  assert(!isStackEmpty() && "Data-sharing attributes stack is empty");
  assert(
      getTopOfStack().SharingMap[D].Attributes == OMPC_reduction &&
      "Additional reduction info may be specified only for reduction items.");
  ReductionData &ReductionData = getTopOfStack().ReductionMap[D];
  assert(ReductionData.ReductionRange.isInvalid() &&
         getTopOfStack().Directive == OMPD_taskgroup &&
         "Additional reduction info may be specified only once for reduction "
         "items.");
  ReductionData.set(BOK, SR);
  Expr *&TaskgroupReductionRef =
      getTopOfStack().TaskgroupReductionRef;
  if (!TaskgroupReductionRef) {
    VarDecl *VD = buildVarDecl(SemaRef, SR.getBegin(),
                               SemaRef.Context.VoidPtrTy, ".task_red.");
    TaskgroupReductionRef =
        buildDeclRefExpr(SemaRef, VD, SemaRef.Context.VoidPtrTy, SR.getBegin());
  }
}

void DSAStackTy::addTaskgroupReductionData(const ValueDecl *D, SourceRange SR,
                                           const Expr *ReductionRef) {
  D = getCanonicalDecl(D);
  assert(!isStackEmpty() && "Data-sharing attributes stack is empty");
  assert(
      getTopOfStack().SharingMap[D].Attributes == OMPC_reduction &&
      "Additional reduction info may be specified only for reduction items.");
  ReductionData &ReductionData = getTopOfStack().ReductionMap[D];
  assert(ReductionData.ReductionRange.isInvalid() &&
         getTopOfStack().Directive == OMPD_taskgroup &&
         "Additional reduction info may be specified only once for reduction "
         "items.");
  ReductionData.set(ReductionRef, SR);
  Expr *&TaskgroupReductionRef =
      getTopOfStack().TaskgroupReductionRef;
  if (!TaskgroupReductionRef) {
    VarDecl *VD = buildVarDecl(SemaRef, SR.getBegin(),
                               SemaRef.Context.VoidPtrTy, ".task_red.");
    TaskgroupReductionRef =
        buildDeclRefExpr(SemaRef, VD, SemaRef.Context.VoidPtrTy, SR.getBegin());
  }
}

const DSAStackTy::DSAVarData DSAStackTy::getTopMostTaskgroupReductionData(
    const ValueDecl *D, SourceRange &SR, BinaryOperatorKind &BOK,
    Expr *&TaskgroupDescriptor) const {
  D = getCanonicalDecl(D);
  assert(!isStackEmpty() && "Data-sharing attributes stack is empty.");
  for (const_iterator I = begin() + 1, E = end(); I != E; ++I154) {
    const DSAInfo &Data = I->SharingMap.lookup(D);
    if (Data.Attributes != OMPC_reduction || I->Directive != OMPD_taskgroup982)
      continue;
    const ReductionData &ReductionData = I->ReductionMap.lookup(D);
    if (!ReductionData.ReductionOp ||
        ReductionData.ReductionOp.is<const Expr *>())
      return DSAVarData();
    SR = ReductionData.ReductionRange;
    BOK = ReductionData.ReductionOp.get<ReductionData::BOKPtrType>();
    assert(I->TaskgroupReductionRef && "taskgroup reduction reference "
                                       "expression for the descriptor is not "
                                       "set.");
    TaskgroupDescriptor = I->TaskgroupReductionRef;
    return DSAVarData(OMPD_taskgroup, OMPC_reduction, Data.RefExpr.getPointer(),
                      Data.PrivateCopy, I->DefaultAttrLoc);
  }
  return DSAVarData()150;
}

const DSAStackTy::DSAVarData DSAStackTy::getTopMostTaskgroupReductionData(
    const ValueDecl *D, SourceRange &SR, const Expr *&ReductionRef,
    Expr *&TaskgroupDescriptor) const {
  D = getCanonicalDecl(D);
  assert(!isStackEmpty() && "Data-sharing attributes stack is empty.");
  for (const_iterator I = begin() + 1, E = end(); I != E; ++I154) {
    const DSAInfo &Data = I->SharingMap.lookup(D);
    if (Data.Attributes != OMPC_reduction || I->Directive != OMPD_taskgroup982)
      continue;
    const ReductionData &ReductionData = I->ReductionMap.lookup(D);
    if (!ReductionData.ReductionOp ||
        !ReductionData.ReductionOp.is<const Expr *>())
      return DSAVarData();
    SR = ReductionData.ReductionRange;
    ReductionRef = ReductionData.ReductionOp.get<const Expr *>();
    assert(I->TaskgroupReductionRef && "taskgroup reduction reference "
                                       "expression for the descriptor is not "
                                       "set.");
    TaskgroupDescriptor = I->TaskgroupReductionRef;
    return DSAVarData(OMPD_taskgroup, OMPC_reduction, Data.RefExpr.getPointer(),
                      Data.PrivateCopy, I->DefaultAttrLoc);
  }
  return DSAVarData()150;
}

bool DSAStackTy::isOpenMPLocal(VarDecl *D, const_iterator I) const {
  D = D->getCanonicalDecl();
  for (const_iterator E = end(); I != E; ++I1.24M) {
    if (isImplicitOrExplicitTaskingRegion(I->Directive) ||
        isOpenMPTargetExecutionDirective(I->Directive)1.39M) {
      Scope *TopScope = I->CurScope ? I->CurScope->getParent()933k : nullptr125k;
      Scope *CurScope = getCurScope();
      while (CurScope && CurScope != TopScope7.90M && !CurScope->isDeclScope(D)6.97M)
        CurScope = CurScope->getParent();
      return CurScope != TopScope;
    }
  }
  return false339k;
}

static bool isConstNotMutableType(Sema &SemaRef, QualType Type,
                                  bool AcceptIfMutable = true,
                                  bool *IsClassType = nullptr) {
  ASTContext &Context = SemaRef.getASTContext();
  Type = Type.getNonReferenceType().getCanonicalType();
  bool IsConstant = Type.isConstant(Context);
  Type = Context.getBaseElementType(Type);
  const CXXRecordDecl *RD = AcceptIfMutable && SemaRef.getLangOpts().CPlusPlus23.8k
                                ? Type->getAsCXXRecordDecl()22.0k
                                : nullptr31.2k;
  if (const auto *CTSD = dyn_cast_or_null<ClassTemplateSpecializationDecl>(RD))
    if (const ClassTemplateDecl *CTD = CTSD->getSpecializedTemplate())
      RD = CTD->getTemplatedDecl();
  if (IsClassType)
    *IsClassType = RD;
  return IsConstant && !(6.73kSemaRef.getLangOpts().CPlusPlus6.73k && RD6.73k &&
                         RD->hasDefinition()1.02k && RD->hasMutableFields()1.02k);
}

static bool rejectConstNotMutableType(Sema &SemaRef, const ValueDecl *D,
                                      QualType Type, OpenMPClauseKind CKind,
                                      SourceLocation ELoc,
                                      bool AcceptIfMutable = true,
                                      bool ListItemNotVar = false) {
  ASTContext &Context = SemaRef.getASTContext();
  bool IsClassType;
  if (isConstNotMutableType(SemaRef, Type, AcceptIfMutable, &IsClassType)) {
    unsigned Diag = ListItemNotVar
                        ? diag::err_omp_const_list_item0
                        : IsClassType ? diag::err_omp_const_not_mutable_variable294
                                      : diag::err_omp_const_variable5.70k;
    SemaRef.Diag(ELoc, Diag) << getOpenMPClauseName(CKind);
    if (!ListItemNotVar && D) {
      const VarDecl *VD = dyn_cast<VarDecl>(D);
      bool IsDecl = !VD || VD->isThisDeclarationADefinition(Context) ==
                               VarDecl::DeclarationOnly;
      SemaRef.Diag(D->getLocation(),
                   IsDecl ? diag::note_previous_decl1.66k : diag::note_defined_here4.33k)
          << D;
    }
    return true;
  }
  return false;
}

const DSAStackTy::DSAVarData DSAStackTy::getTopDSA(ValueDecl *D,
                                                   bool FromParent) {
  D = getCanonicalDecl(D);
  DSAVarData DVar;

  auto *VD = dyn_cast<VarDecl>(D);
  auto TI = Threadprivates.find(D);
  if (TI != Threadprivates.end()) {
    DVar.RefExpr = TI->getSecond().RefExpr.getPointer();
    DVar.CKind = OMPC_threadprivate;
    return DVar;
  }
  if (VD && VD->hasAttr<OMPThreadPrivateDeclAttr>()1.99M) {
    DVar.RefExpr = buildDeclRefExpr(
        SemaRef, VD, D->getType().getNonReferenceType(),
        VD->getAttr<OMPThreadPrivateDeclAttr>()->getLocation());
    DVar.CKind = OMPC_threadprivate;
    addDSA(D, DVar.RefExpr, OMPC_threadprivate);
    return DVar;
  }
  // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
  // in a Construct, C/C++, predetermined, p.1]
  //  Variables appearing in threadprivate directives are threadprivate.
  if ((VD && VD->getTLSKind() != VarDecl::TLS_None1.99M &&
       !(11VD->hasAttr<OMPThreadPrivateDeclAttr>()11 &&
         SemaRef.getLangOpts().OpenMPUseTLS0 &&
         SemaRef.getASTContext().getTargetInfo().isTLSSupported()0)) ||
      (2.01MVD2.01M && VD->getStorageClass() == SC_Register1.99M &&
       VD->hasAttr<AsmLabelAttr>()184 && !VD->isLocalVarDecl()16)) {
    DVar.RefExpr = buildDeclRefExpr(
        SemaRef, VD, D->getType().getNonReferenceType(), D->getLocation());
    DVar.CKind = OMPC_threadprivate;
    addDSA(D, DVar.RefExpr, OMPC_threadprivate);
    return DVar;
  }
  if (SemaRef.getLangOpts().OpenMPCUDAMode && VD4.43k &&
      VD->isLocalVarDeclOrParm()4.43k && !isStackEmpty()4.42k &&
      !isLoopControlVariable(D).first4.42k) {
    const_iterator IterTarget =
        std::find_if(begin(), end(), [](const SharingMapTy &Data) {
          return isOpenMPTargetExecutionDirective(Data.Directive);
        });
    if (IterTarget != end()) {
      const_iterator ParentIterTarget = IterTarget + 1;
      for (const_iterator Iter = begin();
           Iter != ParentIterTarget; ++Iter4.37k) {
        if (isOpenMPLocal(VD, Iter)) {
          DVar.RefExpr =
              buildDeclRefExpr(SemaRef, VD, D->getType().getNonReferenceType(),
                               D->getLocation());
          DVar.CKind = OMPC_threadprivate;
          return DVar;
        }
      }
      if (4.26k!isClauseParsingMode()4.26k || IterTarget != begin()384) {
        auto DSAIter = IterTarget->SharingMap.find(D);
        if (DSAIter != IterTarget->SharingMap.end() &&
            isOpenMPPrivate(DSAIter->getSecond().Attributes)759) {
          DVar.RefExpr = DSAIter->getSecond().RefExpr.getPointer();
          DVar.CKind = OMPC_threadprivate;
          return DVar;
        }
        const_iterator End = end();
        if (!SemaRef.isOpenMPCapturedByRef(
                D, std::distance(ParentIterTarget, End),
                /*OpenMPCaptureLevel=*/0)) {
          DVar.RefExpr =
              buildDeclRefExpr(SemaRef, VD, D->getType().getNonReferenceType(),
                               IterTarget->ConstructLoc);
          DVar.CKind = OMPC_threadprivate;
          return DVar;
        }
      }
    }
  }

  if (isStackEmpty())
    // Not in OpenMP execution region and top scope was already checked.
    return DVar;

  // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
  // in a Construct, C/C++, predetermined, p.4]
  //  Static data members are shared.
  // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
  // in a Construct, C/C++, predetermined, p.7]
  //  Variables with static storage duration that are declared in a scope
  //  inside the construct are shared.
  if (VD && VD->isStaticDataMember()1.99M) {
    // Check for explicitly specified attributes.
    const_iterator I = begin();
    const_iterator EndI = end();
    if (FromParent && I != EndI656)
      ++I;
    auto It = I->SharingMap.find(D);
    if (It != I->SharingMap.end()) {
      const DSAInfo &Data = It->getSecond();
      DVar.RefExpr = Data.RefExpr.getPointer();
      DVar.PrivateCopy = Data.PrivateCopy;
      DVar.CKind = Data.Attributes;
      DVar.ImplicitDSALoc = I->DefaultAttrLoc;
      DVar.DKind = I->Directive;
      return DVar;
    }

    DVar.CKind = OMPC_shared;
    return DVar;
  }

  auto &&MatchesAlways = [](OpenMPDirectiveKind) { return true; }10;
  // The predetermined shared attribute for const-qualified types having no
  // mutable members was removed after OpenMP 3.1.
  if (SemaRef.LangOpts.OpenMP <= 31) {
    // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
    // in a Construct, C/C++, predetermined, p.6]
    //  Variables with const qualified type having no mutable member are
    //  shared.
    if (isConstNotMutableType(SemaRef, D->getType())) {
      // Variables with const-qualified type having no mutable member may be
      // listed in a firstprivate clause, even if they are static data members.
      DSAVarData DVarTemp = hasInnermostDSA(
          D,
          [](OpenMPClauseKind C) {
            return C == OMPC_firstprivate || C == OMPC_shared;
          },
          MatchesAlways, FromParent);
      if (DVarTemp.CKind != OMPC_unknown && DVarTemp.RefExpr0)
        return DVarTemp;

      DVar.CKind = OMPC_shared;
      return DVar;
    }
  }

  // Explicitly specified attributes and local variables with predetermined
  // attributes.
  const_iterator I = begin();
  const_iterator EndI = end();
  if (FromParent && I != EndI61.9k)
    ++I;
  auto It = I->SharingMap.find(D);
  if (It != I->SharingMap.end()) {
    const DSAInfo &Data = It->getSecond();
    DVar.RefExpr = Data.RefExpr.getPointer();
    DVar.PrivateCopy = Data.PrivateCopy;
    DVar.CKind = Data.Attributes;
    DVar.ImplicitDSALoc = I->DefaultAttrLoc;
    DVar.DKind = I->Directive;
  }

  return DVar;
}

const DSAStackTy::DSAVarData DSAStackTy::getImplicitDSA(ValueDecl *D,
                                                        bool FromParent) const {
  if (isStackEmpty()) {
    const_iterator I;
    return getDSA(I, D);
  }
  D = getCanonicalDecl(D);
  const_iterator StartI = begin();
  const_iterator EndI = end();
  if (FromParent && StartI != EndI3.69k)
    ++StartI;
  return getDSA(StartI, D);
}

const DSAStackTy::DSAVarData
DSAStackTy::hasDSA(ValueDecl *D,
                   const llvm::function_ref<bool(OpenMPClauseKind)> CPred,
                   const llvm::function_ref<bool(OpenMPDirectiveKind)> DPred,
                   bool FromParent) const {
  if (isStackEmpty())
    return {};
  D = getCanonicalDecl(D);
  const_iterator I = begin();
  const_iterator EndI = end();
  if (FromParent && I != EndI64.7k)
    ++I;
  for (; I != EndI; ++I496k) {
    if (!DPred(I->Directive) &&
        !isImplicitOrExplicitTaskingRegion(I->Directive)0)
      continue;
    const_iterator NewI = I;
    DSAVarData DVar = getDSA(NewI, D);
    if (I == NewI && CPred(DVar.CKind)157k)
      return DVar;
  }
  return {}265k;
}

const DSAStackTy::DSAVarData DSAStackTy::hasInnermostDSA(
    ValueDecl *D, const llvm::function_ref<bool(OpenMPClauseKind)> CPred,
    const llvm::function_ref<bool(OpenMPDirectiveKind)> DPred,
    bool FromParent) const {
  if (isStackEmpty())
    return {};
  D = getCanonicalDecl(D);
  const_iterator StartI = begin();
  const_iterator EndI = end();
  if (FromParent && StartI != EndI76.2k)
    ++StartI;
  if (StartI == EndI || !DPred(StartI->Directive)42.8k)
    return {};
  const_iterator NewI = StartI;
  DSAVarData DVar = getDSA(NewI, D);
  return (NewI == StartI && CPred(DVar.CKind)19.0k) ? DVar74 : DSAVarData()19.3k;
}

bool DSAStackTy::hasExplicitDSA(
    const ValueDecl *D, const llvm::function_ref<bool(OpenMPClauseKind)> CPred,
    unsigned Level, bool NotLastprivate) const {
  if (getStackSize() <= Level)
    return false;
  D = getCanonicalDecl(D);
  const SharingMapTy &StackElem = getStackElemAtLevel(Level);
  auto I = StackElem.SharingMap.find(D);
  if (I != StackElem.SharingMap.end() &&
      I->getSecond().RefExpr.getPointer()266k &&
      CPred(I->getSecond().Attributes)266k &&
      (117k!NotLastprivate117k || !I->getSecond().RefExpr.getInt()7.52k))
    return true;
  // Check predetermined rules for the loop control variables.
  auto LI = StackElem.LCVMap.find(D);
  if (LI != StackElem.LCVMap.end())
    return CPred(OMPC_private);
  return false;
}

bool DSAStackTy::hasExplicitDirective(
    const llvm::function_ref<bool(OpenMPDirectiveKind)> DPred,
    unsigned Level) const {
  if (getStackSize() <= Level)
    return false;
  const SharingMapTy &StackElem = getStackElemAtLevel(Level);
  return DPred(StackElem.Directive);
}

bool DSAStackTy::hasDirective(
    const llvm::function_ref<bool(OpenMPDirectiveKind,
                                  const DeclarationNameInfo &, SourceLocation)>
        DPred,
    bool FromParent) const {
  // We look only in the enclosing region.
  size_t Skip = FromParent ? 20 : 1;
  for (const_iterator I = begin() + std::min(Skip, getStackSize()), E = end();
       I != E; ++I58.3k) {
    if (DPred(I->Directive, I->DirectiveName, I->ConstructLoc))
      return true;
  }
  return false58.2k;
}

void Sema::InitDataSharingAttributesStack() {
  VarDataSharingAttributesStack = new DSAStackTy(*this);
}

#define DSAStack static_cast<DSAStackTy *>(VarDataSharingAttributesStack)

void Sema::pushOpenMPFunctionRegion() {
  DSAStack->pushFunction();
}

void Sema::popOpenMPFunctionRegion(const FunctionScopeInfo *OldFSI) {
  DSAStack->popFunction(OldFSI);
}

static bool isOpenMPDeviceDelayedContext(Sema &S) {
  assert(S.LangOpts.OpenMP && S.LangOpts.OpenMPIsDevice &&
         "Expected OpenMP device compilation.");
  return !S.isInOpenMPTargetExecutionDirective() &&
         !S.isInOpenMPDeclareTargetContext()13.2k;
}

namespace {
/// Status of the function emission on the host/device.
enum class FunctionEmissionStatus {
  Emitted,
  Discarded,
  Unknown,
};
} // anonymous namespace

Sema::DeviceDiagBuilder Sema::diagIfOpenMPDeviceCode(SourceLocation Loc,
                                                     unsigned DiagID) {
  assert(LangOpts.OpenMP && LangOpts.OpenMPIsDevice &&
         "Expected OpenMP device compilation.");
  FunctionEmissionStatus FES = getEmissionStatus(getCurFunctionDecl());
  DeviceDiagBuilder::Kind Kind = DeviceDiagBuilder::K_Nop;
  switch (FES) {
  case FunctionEmissionStatus::Emitted:
    Kind = DeviceDiagBuilder::K_Immediate;
    break;
  case FunctionEmissionStatus::Unknown:
    Kind = isOpenMPDeviceDelayedContext(*this) ? DeviceDiagBuilder::K_Deferred62
                                               : DeviceDiagBuilder::K_Immediate40;
    break;
  case FunctionEmissionStatus::TemplateDiscarded:
  case FunctionEmissionStatus::OMPDiscarded:
    Kind = DeviceDiagBuilder::K_Nop;
    break;
  case FunctionEmissionStatus::CUDADiscarded:
    llvm_unreachable("CUDADiscarded unexpected in OpenMP device compilation");
    break0;
  }

  return DeviceDiagBuilder(Kind, Loc, DiagID, getCurFunctionDecl(), *this);
}

Sema::DeviceDiagBuilder Sema::diagIfOpenMPHostCode(SourceLocation Loc,
                                                   unsigned DiagID) {
  assert(LangOpts.OpenMP && !LangOpts.OpenMPIsDevice &&
         "Expected OpenMP host compilation.");
  FunctionEmissionStatus FES = getEmissionStatus(getCurFunctionDecl());
  DeviceDiagBuilder::Kind Kind = DeviceDiagBuilder::K_Nop;
  switch (FES) {
  case FunctionEmissionStatus::Emitted:
    Kind = DeviceDiagBuilder::K_Immediate;
    break;
  case FunctionEmissionStatus::Unknown:
    Kind = DeviceDiagBuilder::K_Deferred;
    break;
  case FunctionEmissionStatus::TemplateDiscarded:
  case FunctionEmissionStatus::OMPDiscarded:
  case FunctionEmissionStatus::CUDADiscarded:
    Kind = DeviceDiagBuilder::K_Nop;
    break;
  }

  return DeviceDiagBuilder(Kind, Loc, DiagID, getCurFunctionDecl(), *this);
}

void Sema::checkOpenMPDeviceFunction(SourceLocation Loc, FunctionDecl *Callee,
                                     bool CheckForDelayedContext) {
  assert(LangOpts.OpenMP && LangOpts.OpenMPIsDevice &&
         "Expected OpenMP device compilation.");
  assert(Callee && "Callee may not be null.");
  Callee = Callee->getMostRecentDecl();
  FunctionDecl *Caller = getCurFunctionDecl();

  // host only function are not available on the device.
  if (Caller) {
    FunctionEmissionStatus CallerS = getEmissionStatus(Caller);
    FunctionEmissionStatus CalleeS = getEmissionStatus(Callee);
    assert(CallerS != FunctionEmissionStatus::CUDADiscarded &&
           CalleeS != FunctionEmissionStatus::CUDADiscarded &&
           "CUDADiscarded unexpected in OpenMP device function check");
    if ((CallerS == FunctionEmissionStatus::Emitted ||
         (6.13k!isOpenMPDeviceDelayedContext(*this)6.13k &&
          CallerS == FunctionEmissionStatus::Unknown736)) &&
        CalleeS == FunctionEmissionStatus::OMPDiscarded746) {
      StringRef HostDevTy = getOpenMPSimpleClauseTypeName(
          OMPC_device_type, OMPC_DEVICE_TYPE_host);
      Diag(Loc, diag::err_omp_wrong_device_function_call) << HostDevTy << 0;
      Diag(Callee->getAttr<OMPDeclareTargetDeclAttr>()->getLocation(),
           diag::note_omp_marked_device_type_here)
          << HostDevTy;
      return;
    }
  }
  // If the caller is known-emitted, mark the callee as known-emitted.
  // Otherwise, mark the call in our call graph so we can traverse it later.
  if ((CheckForDelayedContext && !isOpenMPDeviceDelayedContext(*this)7.51k) ||
      (6.64k!Caller6.64k && !CheckForDelayedContext1.23k) ||
      (6.63kCaller6.63k && getEmissionStatus(Caller) == FunctionEmissionStatus::Emitted5.41k))
    markKnownEmitted(*this, Caller, Callee, Loc,
                     [CheckForDelayedContext](Sema &S, FunctionDecl *FD) {
                       return CheckForDelayedContext &&
                              S.getEmissionStatus(FD) ==
                                  FunctionEmissionStatus::Emitted;
                     });
  else if (Caller)
    DeviceCallGraph[Caller].insert({Callee, Loc});
}

void Sema::checkOpenMPHostFunction(SourceLocation Loc, FunctionDecl *Callee,
                                   bool CheckCaller) {
  assert(LangOpts.OpenMP && !LangOpts.OpenMPIsDevice &&
         "Expected OpenMP host compilation.");
  assert(Callee && "Callee may not be null.");
  Callee = Callee->getMostRecentDecl();
  FunctionDecl *Caller = getCurFunctionDecl();

  // device only function are not available on the host.
  if (Caller) {
    FunctionEmissionStatus CallerS = getEmissionStatus(Caller);
    FunctionEmissionStatus CalleeS = getEmissionStatus(Callee);
    assert(
        (LangOpts.CUDA || (CallerS != FunctionEmissionStatus::CUDADiscarded &&
                           CalleeS != FunctionEmissionStatus::CUDADiscarded)) &&
        "CUDADiscarded unexpected in OpenMP host function check");
    if (CallerS == FunctionEmissionStatus::Emitted &&
        CalleeS == FunctionEmissionStatus::OMPDiscarded131k) {
      StringRef NoHostDevTy = getOpenMPSimpleClauseTypeName(
          OMPC_device_type, OMPC_DEVICE_TYPE_nohost);
      Diag(Loc, diag::err_omp_wrong_device_function_call) << NoHostDevTy << 1;
      Diag(Callee->getAttr<OMPDeclareTargetDeclAttr>()->getLocation(),
           diag::note_omp_marked_device_type_here)
          << NoHostDevTy;
      return;
    }
  }
  // If the caller is known-emitted, mark the callee as known-emitted.
  // Otherwise, mark the call in our call graph so we can traverse it later.
  if (!shouldIgnoreInHostDeviceCheck(Callee)) {
    if ((!CheckCaller && !Caller61) ||
        (201kCaller201k &&
         getEmissionStatus(Caller) == FunctionEmissionStatus::Emitted185k))
      markKnownEmitted(
          *this, Caller, Callee, Loc, [CheckCaller](Sema &S, FunctionDecl *FD) {
            return CheckCaller &&
                   S.getEmissionStatus(FD) == FunctionEmissionStatus::Emitted131k;
          });
    else if (Caller)
      DeviceCallGraph[Caller].insert({Callee, Loc});
  }
}

void Sema::checkOpenMPDeviceExpr(const Expr *E) {
  assert(getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice &&
         "OpenMP device compilation mode is expected.");
  QualType Ty = E->getType();
  if ((Ty->isFloat16Type() && !Context.getTargetInfo().hasFloat16Type()0) ||
      ((Ty->isFloat128Type() ||
        (74.2kTy->isRealFloatingType()74.2k && Context.getTypeSize(Ty) == 128895)) &&
       !Context.getTargetInfo().hasFloat128Type()4) ||
      (74.2kTy->isIntegerType()74.2k && Context.getTypeSize(Ty) == 12873.3k &&
       !Context.getTargetInfo().hasInt128Type()12))
    targetDiag(E->getExprLoc(), diag::err_omp_unsupported_type)
        << static_cast<unsigned>(Context.getTypeSize(Ty)) << Ty
        << Context.getTargetInfo().getTriple().str() << E->getSourceRange();
}

static OpenMPDefaultmapClauseKind
getVariableCategoryFromDecl(const LangOptions &LO, const ValueDecl *VD) {
  if (LO.OpenMP <= 45) {
    if (VD->getType().getNonReferenceType()->isScalarType())
      return OMPC_DEFAULTMAP_scalar;
    return OMPC_DEFAULTMAP_aggregate;
  }
  if (VD->getType().getNonReferenceType()->isAnyPointerType())
    return OMPC_DEFAULTMAP_pointer;
  if (VD->getType().getNonReferenceType()->isScalarType())
    return OMPC_DEFAULTMAP_scalar;
  return OMPC_DEFAULTMAP_aggregate;
}

bool Sema::isOpenMPCapturedByRef(const ValueDecl *D, unsigned Level,
                                 unsigned OpenMPCaptureLevel) const {
  assert(LangOpts.OpenMP && "OpenMP is not allowed");

  ASTContext &Ctx = getASTContext();
  bool IsByRef = true;

  // Find the directive that is associated with the provided scope.
  D = cast<ValueDecl>(D->getCanonicalDecl());
  QualType Ty = D->getType();

  bool IsVariableUsedInMapClause = false;
  if (DSAStack->hasExplicitDirective(isOpenMPTargetExecutionDirective, Level)) {
    // This table summarizes how a given variable should be passed to the device
    // given its type and the clauses where it appears. This table is based on
    // the description in OpenMP 4.5 [2.10.4, target Construct] and
    // OpenMP 4.5 [2.15.5, Data-mapping Attribute Rules and Clauses].
    //
    // =========================================================================
    // | type |  defaultmap   | pvt | first | is_device_ptr |    map   | res.  |
    // |      |(tofrom:scalar)|     |  pvt  |               |          |       |
    // =========================================================================
    // | scl  |               |     |       |       -       |          | bycopy|
    // | scl  |               |  -  |   x   |       -       |     -    | bycopy|
    // | scl  |               |  x  |   -   |       -       |     -    | null  |
    // | scl  |       x       |     |       |       -       |          | byref |
    // | scl  |       x       |  -  |   x   |       -       |     -    | bycopy|
    // | scl  |       x       |  x  |   -   |       -       |     -    | null  |
    // | scl  |               |  -  |   -   |       -       |     x    | byref |
    // | scl  |       x       |  -  |   -   |       -       |     x    | byref |
    //
    // | agg  |      n.a.     |     |       |       -       |          | byref |
    // | agg  |      n.a.     |  -  |   x   |       -       |     -    | byref |
    // | agg  |      n.a.     |  x  |   -   |       -       |     -    | null  |
    // | agg  |      n.a.     |  -  |   -   |       -       |     x    | byref |
    // | agg  |      n.a.     |  -  |   -   |       -       |    x[]   | byref |
    //
    // | ptr  |      n.a.     |     |       |       -       |          | bycopy|
    // | ptr  |      n.a.     |  -  |   x   |       -       |     -    | bycopy|
    // | ptr  |      n.a.     |  x  |   -   |       -       |     -    | null  |
    // | ptr  |      n.a.     |  -  |   -   |       -       |     x    | byref |
    // | ptr  |      n.a.     |  -  |   -   |       -       |    x[]   | bycopy|
    // | ptr  |      n.a.     |  -  |   -   |       x       |          | bycopy|
    // | ptr  |      n.a.     |  -  |   -   |       x       |     x    | bycopy|
    // | ptr  |      n.a.     |  -  |   -   |       x       |    x[]   | bycopy|
    // =========================================================================
    // Legend:
    //  scl - scalar
    //  ptr - pointer
    //  agg - aggregate
    //  x - applies
    //  - - invalid in this combination
    //  [] - mapped with an array section
    //  byref - should be mapped by reference
    //  byval - should be mapped by value
    //  null - initialize a local variable to null on the device
    //
    // Observations:
    //  - All scalar declarations that show up in a map clause have to be passed
    //    by reference, because they may have been mapped in the enclosing data
    //    environment.
    //  - If the scalar value does not fit the size of uintptr, it has to be
    //    passed by reference, regardless the result in the table above.
    //  - For pointers mapped by value that have either an implicit map or an
    //    array section, the runtime library may pass the NULL value to the
    //    device instead of the value passed to it by the compiler.

    if (Ty->isReferenceType())
      Ty = Ty->castAs<ReferenceType>()->getPointeeType();

    // Locate map clauses and see if the variable being captured is referred to
    // in any of those clauses. Here we only care about variables, not fields,
    // because fields are part of aggregates.
    bool IsVariableAssociatedWithSection = false;

    DSAStack->checkMappableExprComponentListsForDeclAtLevel(
        D, Level,
        [&IsVariableUsedInMapClause, &IsVariableAssociatedWithSection, D](
            OMPClauseMappableExprCommon::MappableExprComponentListRef
                MapExprComponents,
            OpenMPClauseKind WhereFoundClauseKind) {
          // Only the map clause information influences how a variable is
          // captured. E.g. is_device_ptr does not require changing the default
          // behavior.
          if (WhereFoundClauseKind != OMPC_map)
            return false;

          auto EI = MapExprComponents.rbegin();
          auto EE = MapExprComponents.rend();

          assert(EI != EE && "Invalid map expression!");

          if (isa<DeclRefExpr>(EI->getAssociatedExpression()))
            IsVariableUsedInMapClause |= EI->getAssociatedDeclaration() == D;

          ++EI;
          if (EI == EE)
            return false;

          if (isa<ArraySubscriptExpr>(EI->getAssociatedExpression()) ||
              isa<OMPArraySectionExpr>(EI->getAssociatedExpression())3.27k ||
              isa<MemberExpr>(EI->getAssociatedExpression())840) {
            IsVariableAssociatedWithSection = true;
            // There is nothing more we need to know about this variable.
            return true;
          }

          // Keep looking for more map info.
          return false;
        });

    if (IsVariableUsedInMapClause) {
      // If variable is identified in a map clause it is always captured by
      // reference except if it is a pointer that is dereferenced somehow.
      IsByRef = !(Ty->isPointerType() && IsVariableAssociatedWithSection2.08k);
    } else {
      // By default, all the data that has a scalar type is mapped by copy
      // (except for reduction variables).
      // Defaultmap scalar is mutual exclusive to defaultmap pointer
      IsByRef =
          (DSAStack->isForceCaptureByReferenceInTargetExecutable() &&
           !Ty->isAnyPointerType()92) ||
          !Ty->isScalarType()652k ||
          DSAStack446k->isDefaultmapCapturedByRef(
              Level, getVariableCategoryFromDecl(LangOpts, D)) ||
          DSAStack444k->hasExplicitDSA(
              D, [](OpenMPClauseKind K) { return K == OMPC_reduction; }27.9k, Level);
    }
  }

  if (IsByRef && Ty.getNonReferenceType()->isScalarType()640k) {
    IsByRef =
        ((IsVariableUsedInMapClause &&
          DSAStack5.43k->getCaptureRegion(Level, OpenMPCaptureLevel) ==
              OMPD_target) ||
         !287kDSAStack287k->hasExplicitDSA(
             D,
             [](OpenMPClauseKind K) -> bool { return K == OMPC_firstprivate; }39.9k,
             Level, /*NotLastprivate=*/true)) &&
        // If the variable is artificial and must be captured by value - try to
        // capture by value.
        !(282kisa<OMPCapturedExprDecl>(D)282k && !D->hasAttr<OMPCaptureNoInitAttr>()2.72k &&
          !cast<OMPCapturedExprDecl>(D)->getInit()->isGLValue()2.59k);
  }

  // When passing data by copy, we need to make sure it fits the uintptr size
  // and alignment, because the runtime library only deals with uintptr types.
  // If it does not fit the uintptr size, we need to pass the data by reference
  // instead.
  if (!IsByRef &&
      (449kCtx.getTypeSizeInChars(Ty) >
           Ctx.getTypeSizeInChars(Ctx.getUIntPtrType()) ||
       Ctx.getDeclAlign(D) > Ctx.getTypeAlignInChars(Ctx.getUIntPtrType())447k)) {
    IsByRef = true;
  }

  return IsByRef;
}

unsigned Sema::getOpenMPNestingLevel() const {
  assert(getLangOpts().OpenMP);
  return DSAStack->getNestingLevel();
}

bool Sema::isInOpenMPTargetExecutionDirective() const {
  return (isOpenMPTargetExecutionDirective(DSAStack->getCurrentDirective()) &&
          !65.5kDSAStack65.5k->isClauseParsingMode()) ||
         DSAStack114k->hasDirective(
             [](OpenMPDirectiveKind K, const DeclarationNameInfo &,
                SourceLocation) -> bool {
               return isOpenMPTargetExecutionDirective(K);
             },
             false);
}

VarDecl *Sema::isOpenMPCapturedDecl(ValueDecl *D, bool CheckScopeInfo,
                                    unsigned StopAt) {
  assert(LangOpts.OpenMP && "OpenMP is not allowed");
  D = getCanonicalDecl(D);

  auto *VD = dyn_cast<VarDecl>(D);
  // Do not capture constexpr variables.
  if (VD && VD->isConstexpr()1.30M)
    return nullptr;

  // If we want to determine whether the variable should be captured from the
  // perspective of the current capturing scope, and we've already left all the
  // capturing scopes of the top directive on the stack, check from the
  // perspective of its parent directive (if any) instead.
  DSAStackTy::ParentDirectiveScope InParentDirectiveRAII(
      *DSAStack, CheckScopeInfo && DSAStack195k->isBodyComplete()195k);

  // If we are attempting to capture a global variable in a directive with
  // 'target' we return true so that this global is also mapped to the device.
  //
  if (VD && !VD->hasLocalStorage()1.30M &&
      (253kgetCurCapturedRegion()253k || getCurBlock()94.3k || getCurLambda()93.1k)) {
    if (isInOpenMPDeclareTargetContext()) {
      // Try to mark variable as declare target if it is used in capturing
      // regions.
      if (LangOpts.OpenMP <= 45 &&
          !OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD)46)
        checkDeclIsAllowedInOpenMPTarget(nullptr, VD);
      return nullptr;
    } else if (isInOpenMPTargetExecutionDirective()) {
      // If the declaration is enclosed in a 'declare target' directive,
      // then it should not be captured.
      //
      if (OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD))
        return nullptr;
      CapturedRegionScopeInfo *CSI = nullptr;
      for (FunctionScopeInfo *FSI : llvm::drop_begin(
               llvm::reverse(FunctionScopes),
               CheckScopeInfo ? (FunctionScopes.size() - (StopAt + 1))71.4k : 051.9k)) {
        if (!isa<CapturingScopeInfo>(FSI))
          return nullptr;
        if (auto *RSI = dyn_cast<CapturedRegionScopeInfo>(FSI))
          if (RSI->CapRegionKind == CR_OpenMP) {
            CSI = RSI;
            break;
          }
      }
      SmallVector<OpenMPDirectiveKind, 4> Regions;
      getOpenMPCaptureRegions(Regions,
                              DSAStack->getDirective(CSI->OpenMPLevel));
      if (Regions[CSI->OpenMPCaptureLevel] != OMPD_task)
        return VD;
    }
  }

  if (CheckScopeInfo) {
    bool OpenMPFound = false;
    for (unsigned I = StopAt + 1; I > 0; --I3.53k) {
      FunctionScopeInfo *FSI = FunctionScopes[I - 1];
      if(!isa<CapturingScopeInfo>(FSI))
        return nullptr;
      if (auto *RSI = dyn_cast<CapturedRegionScopeInfo>(FSI))
        if (RSI->CapRegionKind == CR_OpenMP) {
          OpenMPFound = true;
          break;
        }
    }
    if (51.2k!OpenMPFound51.2k)
      return nullptr;
  }

  if (DSAStack->getCurrentDirective() != OMPD_unknown &&
      (1.11M!1.11MDSAStack1.11M->isClauseParsingMode() ||
       DSAStack192k->getParentDirective() != OMPD_unknown192k)) {
    auto &&Info = DSAStack->isLoopControlVariable(D);
    if (Info.first ||
        (1.10MVD1.10M && VD->hasLocalStorage()1.09M &&
         isImplicitOrExplicitTaskingRegion(1.03MDSAStack1.03M->getCurrentDirective())) ||
        (309kVD309k && DSAStack299k->isForceVarCapturing()299k))
      return VD ? VD794k : Info.second716;
    DSAStackTy::DSAVarData DVarPrivate =
        DSAStack->getTopDSA(D, DSAStack->isClauseParsingMode());
    if (DVarPrivate.CKind != OMPC_unknown && isOpenMPPrivate(DVarPrivate.CKind)45.1k)
      return VD ? VD34.7k : cast<VarDecl>(DVarPrivate.PrivateCopy->getDecl())4.80k;
    // Threadprivate variables must not be captured.
    if (isOpenMPThreadPrivate(DVarPrivate.CKind))
      return nullptr;
    // The variable is not private or it is the variable in the directive with
    // default(none) clause and not used in any clause.
    DVarPrivate = DSAStack->hasDSA(D, isOpenMPPrivate,
                                   [](OpenMPDirectiveKind) { return true; },
                                   DSAStack->isClauseParsingMode());
    if (DVarPrivate.CKind != OMPC_unknown ||
        (262kVD262k && DSAStack258k->getDefaultDSA() == DSA_none258k))
      return VD ? VD3.22k : cast<VarDecl>(DVarPrivate.PrivateCopy->getDecl())1.05k;
  }
  return nullptr;
}

void Sema::adjustOpenMPTargetScopeIndex(unsigned &FunctionScopesIndex,
                                        unsigned Level) const {
  SmallVector<OpenMPDirectiveKind, 4> Regions;
  getOpenMPCaptureRegions(Regions, DSAStack->getDirective(Level));
  FunctionScopesIndex -= Regions.size();
}

void Sema::startOpenMPLoop() {
  assert(LangOpts.OpenMP && "OpenMP must be enabled.");
  if (isOpenMPLoopDirective(DSAStack->getCurrentDirective()))
    DSAStack133k->loopInit()133k;
}

void Sema::startOpenMPCXXRangeFor() {
  assert(LangOpts.OpenMP && "OpenMP must be enabled.");
  if (isOpenMPLoopDirective(DSAStack->getCurrentDirective())) {
    DSAStack->resetPossibleLoopCounter();
    DSAStack->loopStart();
  }
}

bool Sema::isOpenMPPrivateDecl(const ValueDecl *D, unsigned Level) const {
  assert(LangOpts.OpenMP && "OpenMP is not allowed");
  if (isOpenMPLoopDirective(DSAStack->getCurrentDirective())) {
    if (DSAStack->getAssociatedLoops() > 0 &&
        !494kDSAStack494k->isLoopStarted()) {
      DSAStack->resetPossibleLoopCounter(D);
      DSAStack->loopStart();
      return true;
    }
    if ((DSAStack->getPossiblyLoopCunter() == D->getCanonicalDecl() ||
         DSAStack812k->isLoopControlVariable(D).first812k) &&
        !205kDSAStack205k->hasExplicitDSA(
            D, [](OpenMPClauseKind K) { return K != OMPC_private; }37.8k, Level) &&
        !isOpenMPSimdDirective(199kDSAStack199k->getCurrentDirective()))
      return true;
  }
  if (const auto *VD = dyn_cast<VarDecl>(D)) {
    if (DSAStack->isThreadPrivate(const_cast<VarDecl *>(VD)) &&
        DSAStack4.43k->isForceVarCapturing()4.43k &&
        !160DSAStack160->hasExplicitDSA(
            D, [](OpenMPClauseKind K) { return K == OMPC_copyin; }154, Level))
      return true;
  }
  return DSAStack->hasExplicitDSA(
             D, [](OpenMPClauseKind K) { return K == OMPC_private; }106k, Level) ||
         (1.07MDSAStack1.07M->isClauseParsingMode()1.07M &&
          DSAStack192k->getClauseParsingMode() == OMPC_private192k) ||
         // Consider taskgroup reduction descriptor variable a private to avoid
         // possible capture in the region.
         (1.05MDSAStack1.05M->hasExplicitDirective(
              [](OpenMPDirectiveKind K) { return K == OMPD_taskgroup; },
              Level) &&
          DSAStack9.89k->isTaskgroupReductionRef(D, Level)9.89k);
}

void Sema::setOpenMPCaptureKind(FieldDecl *FD, const ValueDecl *D,
                                unsigned Level) {
  assert(LangOpts.OpenMP && "OpenMP is not allowed");
  D = getCanonicalDecl(D);
  OpenMPClauseKind OMPC = OMPC_unknown;
  for (unsigned I = DSAStack303k->getNestingLevel() + 1; I > Level; --I87.7k) {
    const unsigned NewLevel = I - 1;
    if (DSAStack->hasExplicitDSA(D,
                                 [&OMPC](const OpenMPClauseKind K) {
                                   if (isOpenMPPrivate(K)) {
                                     OMPC = K;
                                     return true;
                                   }
                                   return false;
                                 },
                                 NewLevel))
      break;
    if (DSAStack->checkMappableExprComponentListsForDeclAtLevel(
            D, NewLevel,
            [](OMPClauseMappableExprCommon::MappableExprComponentListRef,
               OpenMPClauseKind) { return true; }4.52k)) {
      OMPC = OMPC_map;
      break;
    }
    if (DSAStack->hasExplicitDirective(isOpenMPTargetExecutionDirective,
                                       NewLevel)) {
      OMPC = OMPC_map;
      if (DSAStack->mustBeFirstprivateAtLevel(
              NewLevel, getVariableCategoryFromDecl(LangOpts, D)))
        OMPC = OMPC_firstprivate;
      break;
    }
  }
  if (OMPC != OMPC_unknown)
    FD->addAttr(OMPCaptureKindAttr::CreateImplicit(Context, OMPC));
}

bool Sema::isOpenMPTargetCapturedDecl(const ValueDecl *D, unsigned Level,
                                      unsigned CaptureLevel) const {
  assert(LangOpts.OpenMP && "OpenMP is not allowed");
  // Return true if the current level is no longer enclosed in a target region.

  SmallVector<OpenMPDirectiveKind, 4> Regions;
  getOpenMPCaptureRegions(Regions, DSAStack->getDirective(Level));
  const auto *VD = dyn_cast<VarDecl>(D);
  return VD && !VD->hasLocalStorage() &&
         DSAStack34.4k->hasExplicitDirective(isOpenMPTargetExecutionDirective,
                                        Level) &&
         Regions[CaptureLevel] != OMPD_task17.9k;
}

void Sema::DestroyDataSharingAttributesStack() { delete DSAStack; }

void Sema::finalizeOpenMPDelayedAnalysis() {
  assert(LangOpts.OpenMP && "Expected OpenMP compilation mode.");
  // Diagnose implicit declare target functions and their callees.
  for (const auto &CallerCallees : DeviceCallGraph) {
    Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy =
        OMPDeclareTargetDeclAttr::getDeviceType(
            CallerCallees.getFirst()->getMostRecentDecl());
    // Ignore host functions during device analyzis.
    if (LangOpts.OpenMPIsDevice && DevTy3.65k &&
        *DevTy == OMPDeclareTargetDeclAttr::DT_Host0)
      continue;
    // Ignore nohost functions during host analyzis.
    if (!LangOpts.OpenMPIsDevice && DevTy3.21k &&
        *DevTy == OMPDeclareTargetDeclAttr::DT_NoHost106)
      continue;
    for (const std::pair<CanonicalDeclPtr<FunctionDecl>, SourceLocation>
             &Callee : CallerCallees.getSecond()) {
      const FunctionDecl *FD = Callee.first->getMostRecentDecl();
      Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy =
          OMPDeclareTargetDeclAttr::getDeviceType(FD);
      if (LangOpts.OpenMPIsDevice && DevTy4.33k &&
          *DevTy == OMPDeclareTargetDeclAttr::DT_Host18) {
        // Diagnose host function called during device codegen.
        StringRef HostDevTy = getOpenMPSimpleClauseTypeName(
            OMPC_device_type, OMPC_DEVICE_TYPE_host);
        Diag(Callee.second, diag::err_omp_wrong_device_function_call)
            << HostDevTy << 0;
        Diag(FD->getAttr<OMPDeclareTargetDeclAttr>()->getLocation(),
             diag::note_omp_marked_device_type_here)
            << HostDevTy;
        continue;
      }
      if (!LangOpts.OpenMPIsDevice && DevTy9.45k &&
          *DevTy == OMPDeclareTargetDeclAttr::DT_NoHost139) {
        // Diagnose nohost function called during host codegen.
        StringRef NoHostDevTy = getOpenMPSimpleClauseTypeName(
            OMPC_device_type, OMPC_DEVICE_TYPE_nohost);
        Diag(Callee.second, diag::err_omp_wrong_device_function_call)
            << NoHostDevTy << 1;
        Diag(FD->getAttr<OMPDeclareTargetDeclAttr>()->getLocation(),
             diag::note_omp_marked_device_type_here)
            << NoHostDevTy;
        continue;
      }
    }
  }
}

void Sema::StartOpenMPDSABlock(OpenMPDirectiveKind DKind,
                               const DeclarationNameInfo &DirName,
                               Scope *CurScope, SourceLocation Loc) {
  DSAStack->push(DKind, DirName, CurScope, Loc);
  PushExpressionEvaluationContext(
      ExpressionEvaluationContext::PotentiallyEvaluated);
}

void Sema::StartOpenMPClause(OpenMPClauseKind K) {
  DSAStack->setClauseParsingMode(K);
}

void Sema::EndOpenMPClause() {
  DSAStack->setClauseParsingMode(/*K=*/OMPC_unknown);
}

static void checkAllocateClauses(Sema &S, DSAStackTy *Stack,
                                 ArrayRef<OMPClause *> Clauses);
static std::pair<ValueDecl *, bool>
getPrivateItem(Sema &S, Expr *&RefExpr, SourceLocation &ELoc,
               SourceRange &ERange, bool AllowArraySection = false);
static DeclRefExpr *buildCapture(Sema &S, ValueDecl *D, Expr *CaptureExpr,
                                 bool WithInit);

void Sema::EndOpenMPDSABlock(Stmt *CurDirective) {
  // OpenMP [2.14.3.5, Restrictions, C/C++, p.1]
  //  A variable of class type (or array thereof) that appears in a lastprivate
  //  clause requires an accessible, unambiguous default constructor for the
  //  class type, unless the list item is also specified in a firstprivate
  //  clause.
  if (const auto *D = dyn_cast_or_null<OMPExecutableDirective>(CurDirective)) {
    for (OMPClause *C : D->clauses()) {
      if (auto *Clause = dyn_cast<OMPLastprivateClause>(C)) {
        SmallVector<Expr *, 8> PrivateCopies;
        for (Expr *DE : Clause->varlists()) {
          if (DE->isValueDependent() || DE->isTypeDependent()8.15k) {
            PrivateCopies.push_back(nullptr);
            continue;
          }
          auto *DRE = cast<DeclRefExpr>(DE->IgnoreParens());
          auto *VD = cast<VarDecl>(DRE->getDecl());
          QualType Type = VD->getType().getNonReferenceType();
          const DSAStackTy::DSAVarData DVar =
              DSAStack->getTopDSA(VD, /*FromParent=*/false);
          if (DVar.CKind == OMPC_lastprivate) {
            // Generate helper private variable and initialize it with the
            // default value. The address of the original variable is replaced
            // by the address of the new private variable in CodeGen. This new
            // variable is not added to IdResolver, so the code in the OpenMP
            // region uses original variable for proper diagnostics.
            VarDecl *VDPrivate = buildVarDecl(
                *this, DE->getExprLoc(), Type.getUnqualifiedType(),
                VD->getName(), VD->hasAttrs() ? &VD->getAttrs()92 : nullptr7.37k, DRE);
            ActOnUninitializedDecl(VDPrivate);
            if (VDPrivate->isInvalidDecl()) {
              PrivateCopies.push_back(nullptr);
              continue;
            }
            PrivateCopies.push_back(buildDeclRefExpr(
                *this, VDPrivate, DE->getType(), DE->getExprLoc()));
          } else {
            // The variable is also a firstprivate, so initialization sequence
            // for private copy is generated already.
            PrivateCopies.push_back(nullptr);
          }
        }
        Clause->setPrivateCopies(PrivateCopies);
        continue;
      }
      // Finalize nontemporal clause by handling private copies, if any.
      if (auto *Clause = dyn_cast<OMPNontemporalClause>(C)) {
        SmallVector<Expr *, 8> PrivateRefs;
        for (Expr *RefExpr : Clause->varlists()) {
          assert(RefExpr && "NULL expr in OpenMP nontemporal clause.");
          SourceLocation ELoc;
          SourceRange ERange;
          Expr *SimpleRefExpr = RefExpr;
          auto Res = getPrivateItem(*this, SimpleRefExpr, ELoc, ERange);
          if (Res.second)
            // It will be analyzed later.
            PrivateRefs.push_back(RefExpr);
          ValueDecl *D = Res.first;
          if (!D)
            continue;

          const DSAStackTy::DSAVarData DVar =
              DSAStack->getTopDSA(D, /*FromParent=*/false);
          PrivateRefs.push_back(DVar.PrivateCopy ? DVar.PrivateCopy20
                                                 : SimpleRefExpr538);
        }
        Clause->setPrivateRefs(PrivateRefs);
        continue;
      }
    }
    // Check allocate clauses.
    if (!CurContext->isDependentContext())
      checkAllocateClauses(*this, DSAStack, D->clauses());
  }

  DSAStack->pop();
  DiscardCleanupsInEvaluationContext();
  PopExpressionEvaluationContext();
}

static bool FinishOpenMPLinearClause(OMPLinearClause &Clause, DeclRefExpr *IV,
                                     Expr *NumIterations, Sema &SemaRef,
                                     Scope *S, DSAStackTy *Stack);

namespace {

class VarDeclFilterCCC final : public CorrectionCandidateCallback {
private:
  Sema &SemaRef;

public:
  explicit VarDeclFilterCCC(Sema &S) : SemaRef(S) {}
  bool ValidateCandidate(const TypoCorrection &Candidate) override {
    NamedDecl *ND = Candidate.getCorrectionDecl();
    if (const auto *VD = dyn_cast_or_null<VarDecl>(ND)) {
      return VD->hasGlobalStorage() &&
             SemaRef.isDeclInScope(ND, SemaRef.getCurLexicalContext(),
                                   SemaRef.getCurScope());
    }
    return false;
  }

  std::unique_ptr<CorrectionCandidateCallback> clone() override {
    return std::make_unique<VarDeclFilterCCC>(*this);
  }

};

class VarOrFuncDeclFilterCCC final : public CorrectionCandidateCallback {
private:
  Sema &SemaRef;

public:
  explicit VarOrFuncDeclFilterCCC(Sema &S) : SemaRef(S) {}
  bool ValidateCandidate(const TypoCorrection &Candidate) override {
    NamedDecl *ND = Candidate.getCorrectionDecl();
    if (ND && (0(0isa<VarDecl>(ND)0 && ND->getKind() == Decl::Var0) ||
               isa<FunctionDecl>(ND))) {
      return SemaRef.isDeclInScope(ND, SemaRef.getCurLexicalContext(),
                                   SemaRef.getCurScope());
    }
    return false;
  }

  std::unique_ptr<CorrectionCandidateCallback> clone() override {
    return std::make_unique<VarOrFuncDeclFilterCCC>(*this);
  }
};

} // namespace

ExprResult Sema::ActOnOpenMPIdExpression(Scope *CurScope,
                                         CXXScopeSpec &ScopeSpec,
                                         const DeclarationNameInfo &Id,
                                         OpenMPDirectiveKind Kind) {
  LookupResult Lookup(*this, Id, LookupOrdinaryName);
  LookupParsedName(Lookup, CurScope, &ScopeSpec, true);

  if (Lookup.isAmbiguous())
    return ExprError();

  VarDecl *VD;
  if (!Lookup.isSingleResult()) {
    VarDeclFilterCCC CCC(*this);
    if (TypoCorrection Corrected =
            CorrectTypo(Id, LookupOrdinaryName, CurScope, nullptr, CCC,
                        CTK_ErrorRecovery)) {
      diagnoseTypo(Corrected,
                   PDiag(Lookup.empty()
                             ? diag::err_undeclared_var_use_suggest
                             : diag::err_omp_expected_var_arg_suggest0)
                       << Id.getName());
      VD = Corrected.getCorrectionDeclAs<VarDecl>();
    } else {
      Diag(Id.getLoc(), Lookup.empty() ? diag::err_undeclared_var_use
                                       : diag::err_omp_expected_var_arg0)
          << Id.getName();
      return ExprError();
    }
  } else if (!(VD = Lookup.getAsSingle<VarDecl>())) {
    Diag(Id.getLoc(), diag::err_omp_expected_var_arg) << Id.getName();
    Diag(Lookup.getFoundDecl()->getLocation(), diag::note_declared_at);
    return ExprError();
  }
  Lookup.suppressDiagnostics();

  // OpenMP [2.9.2, Syntax, C/C++]
  //   Variables must be file-scope, namespace-scope, or static block-scope.
  if (Kind == OMPD_threadprivate && !VD->hasGlobalStorage()2.09k) {
    Diag(Id.getLoc(), diag::err_omp_global_var_arg)
        << getOpenMPDirectiveName(Kind) << !VD->isStaticLocal();
    bool IsDecl =
        VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
    Diag(VD->getLocation(),
         IsDecl ? diag::note_previous_decl0 : diag::note_defined_here)
        << VD;
    return ExprError();
  }

  VarDecl *CanonicalVD = VD->getCanonicalDecl();
  NamedDecl *ND = CanonicalVD;
  // OpenMP [2.9.2, Restrictions, C/C++, p.2]
  //   A threadprivate directive for file-scope variables must appear outside
  //   any definition or declaration.
  if (CanonicalVD->getDeclContext()->isTranslationUnit() &&
      !getCurLexicalContext()->isTranslationUnit()1.40k) {
    Diag(Id.getLoc(), diag::err_omp_var_scope)
        << getOpenMPDirectiveName(Kind) << VD;
    bool IsDecl =
        VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
    Diag(VD->getLocation(),
         IsDecl ? diag::note_previous_decl0 : diag::note_defined_here)
        << VD;
    return ExprError();
  }
  // OpenMP [2.9.2, Restrictions, C/C++, p.3]
  //   A threadprivate directive for static class member variables must appear
  //   in the class definition, in the same scope in which the member
  //   variables are declared.
  if (CanonicalVD->isStaticDataMember() &&
      !CanonicalVD->getDeclContext()->Equals(getCurLexicalContext())157) {
    Diag(Id.getLoc(), diag::err_omp_var_scope)
        << getOpenMPDirectiveName(Kind) << VD;
    bool IsDecl =
        VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
    Diag(VD->getLocation(),
         IsDecl ? diag::note_previous_decl : diag::note_defined_here0)
        << VD;
    return ExprError();
  }
  // OpenMP [2.9.2, Restrictions, C/C++, p.4]
  //   A threadprivate directive for namespace-scope variables must appear
  //   outside any definition or declaration other than the namespace
  //   definition itself.
  if (CanonicalVD->getDeclContext()->isNamespace() &&
      (625!getCurLexicalContext()->isFileContext()625 ||
       !getCurLexicalContext()->Encloses(CanonicalVD->getDeclContext()))) {
    Diag(Id.getLoc(), diag::err_omp_var_scope)
        << getOpenMPDirectiveName(Kind) << VD;
    bool IsDecl =
        VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
    Diag(VD->getLocation(),
         IsDecl ? diag::note_previous_decl : diag::note_defined_here)
        << VD;
    return ExprError();
  }
  // OpenMP [2.9.2, Restrictions, C/C++, p.6]
  //   A threadprivate directive for static block-scope variables must appear
  //   in the scope of the variable and not in a nested scope.
  if (CanonicalVD->isLocalVarDecl() && CurScope404 &&
      !isDeclInScope(ND, getCurLexicalContext(), CurScope)404) {
    Diag(Id.getLoc(), diag::err_omp_var_scope)
        << getOpenMPDirectiveName(Kind) << VD;
    bool IsDecl =
        VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
    Diag(VD->getLocation(),
         IsDecl ? diag::note_previous_decl0 : diag::note_defined_here)
        << VD;
    return ExprError();
  }

  // OpenMP [2.9.2, Restrictions, C/C++, p.2-6]
  //   A threadprivate directive must lexically precede all references to any
  //   of the variables in its list.
  if (Kind == OMPD_threadprivate && VD->isUsed()2.07k &&
      !80DSAStack80->isThreadPrivate(VD)) {
    Diag(Id.getLoc(), diag::err_omp_var_used)
        << getOpenMPDirectiveName(Kind) << VD;
    return ExprError();
  }

  QualType ExprType = VD->getType().getNonReferenceType();
  return DeclRefExpr::Create(Context, NestedNameSpecifierLoc(),
                             SourceLocation(), VD,
                             /*RefersToEnclosingVariableOrCapture=*/false,
                             Id.getLoc(), ExprType, VK_LValue);
}

Sema::DeclGroupPtrTy
Sema::ActOnOpenMPThreadprivateDirective(SourceLocation Loc,
                                        ArrayRef<Expr *> VarList) {
  if (OMPThreadPrivateDecl *D = CheckOMPThreadPrivateDecl(Loc, VarList)) {
    CurContext->addDecl(D);
    return DeclGroupPtrTy::make(DeclGroupRef(D));
  }
  return nullptr;
}

namespace {
class LocalVarRefChecker final
    : public ConstStmtVisitor<LocalVarRefChecker, bool> {
  Sema &SemaRef;

public:
  bool VisitDeclRefExpr(const DeclRefExpr *E) {
    if (const auto *VD = dyn_cast<VarDecl>(E->getDecl())) {
      if (VD->hasLocalStorage()) {
        SemaRef.Diag(E->getBeginLoc(),
                     diag::err_omp_local_var_in_threadprivate_init)
            << E->getSourceRange();
        SemaRef.Diag(VD->getLocation(), diag::note_defined_here)
            << VD << VD->getSourceRange();
        return true;
      }
    }
    return false;
  }
  bool VisitStmt(const Stmt *S) {
    for (const Stmt *Child : S->children()) {
      if (Child && Visit(Child))
        return true;
    }
    return false1.66k;
  }
  explicit LocalVarRefChecker(Sema &SemaRef) : SemaRef(SemaRef) {}
};
} // namespace

OMPThreadPrivateDecl *
Sema::CheckOMPThreadPrivateDecl(SourceLocation Loc, ArrayRef<Expr *> VarList) {
  SmallVector<Expr *, 8> Vars;
  for (Expr *RefExpr : VarList) {
    auto *DE = cast<DeclRefExpr>(RefExpr);
    auto *VD = cast<VarDecl>(DE->getDecl());
    SourceLocation ILoc = DE->getExprLoc();

    // Mark variable as used.
    VD->setReferenced();
    VD->markUsed(Context);

    QualType QType = VD->getType();
    if (QType->isDependentType() || QType->isInstantiationDependentType()2.11k) {
      // It will be analyzed later.
      Vars.push_back(DE);
      continue;
    }

    // OpenMP [2.9.2, Restrictions, C/C++, p.10]
    //   A threadprivate variable must not have an incomplete type.
    if (RequireCompleteType(ILoc, VD->getType(),
                            diag::err_omp_threadprivate_incomplete_type)) {
      continue;
    }

    // OpenMP [2.9.2, Restrictions, C/C++, p.10]
    //   A threadprivate variable must not have a reference type.
    if (VD->getType()->isReferenceType()) {
      Diag(ILoc, diag::err_omp_ref_type_arg)
          << getOpenMPDirectiveName(OMPD_threadprivate) << VD->getType();
      bool IsDecl =
          VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
      Diag(VD->getLocation(),
           IsDecl ? diag::note_previous_decl0 : diag::note_defined_here)
          << VD;
      continue;
    }

    // Check if this is a TLS variable. If TLS is not being supported, produce
    // the corresponding diagnostic.
    if ((VD->getTLSKind() != VarDecl::TLS_None &&
         !(27VD->hasAttr<OMPThreadPrivateDeclAttr>()27 &&
           getLangOpts().OpenMPUseTLS23 &&
           getASTContext().getTargetInfo().isTLSSupported()23)) ||
        (2.10kVD->getStorageClass() == SC_Register2.10k && VD->hasAttr<AsmLabelAttr>()4 &&
         !VD->isLocalVarDecl()4)) {
      Diag(ILoc, diag::err_omp_var_thread_local)
          << VD << ((VD->getTLSKind() != VarDecl::TLS_None) ? 04 : 14);
      bool IsDecl =
          VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
      Diag(VD->getLocation(),
           IsDecl ? diag::note_previous_decl0 : diag::note_defined_here)
          << VD;
      continue;
    }

    // Check if initial value of threadprivate variable reference variable with
    // local storage (it is not supported by runtime).
    if (const Expr *Init = VD->getAnyInitializer()) {
      LocalVarRefChecker Checker(*this);
      if (Checker.Visit(Init))
        continue;
    }

    Vars.push_back(RefExpr);
    DSAStack->addDSA(VD, DE, OMPC_threadprivate);
    VD->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
        Context, SourceRange(Loc, Loc)));
    if (ASTMutationListener *ML = Context.getASTMutationListener())
      ML->DeclarationMarkedOpenMPThreadPrivate(VD);
  }
  OMPThreadPrivateDecl *D = nullptr;
  if (!Vars.empty()) {
    D = OMPThreadPrivateDecl::Create(Context, getCurLexicalContext(), Loc,
                                     Vars);
    D->setAccess(AS_public);
  }
  return D;
}

static OMPAllocateDeclAttr::AllocatorTypeTy
getAllocatorKind(Sema &S, DSAStackTy *Stack, Expr *Allocator) {
  if (!Allocator)
    return OMPAllocateDeclAttr::OMPDefaultMemAlloc;
  if (Allocator->isTypeDependent() || Allocator->isValueDependent() ||
      Allocator->isInstantiationDependent() ||
      Allocator->containsUnexpandedParameterPack())
    return OMPAllocateDeclAttr::OMPUserDefinedMemAlloc;
  auto AllocatorKindRes = OMPAllocateDeclAttr::OMPUserDefinedMemAlloc;
  const Expr *AE = Allocator->IgnoreParenImpCasts();
  for (int I = OMPAllocateDeclAttr::OMPDefaultMemAlloc;
       I < OMPAllocateDeclAttr::OMPUserDefinedMemAlloc; ++I3.87k) {
    auto AllocatorKind = static_cast<OMPAllocateDeclAttr::AllocatorTypeTy>(I);
    const Expr *DefAllocator = Stack->getAllocator(AllocatorKind);
    llvm::FoldingSetNodeID AEId, DAEId;
    AE->Profile(AEId, S.getASTContext(), /*Canonical=*/true);
    DefAllocator->Profile(DAEId, S.getASTContext(), /*Canonical=*/true);
    if (AEId == DAEId) {
      AllocatorKindRes = AllocatorKind;
      break;
    }
  }
  return AllocatorKindRes;
}

static bool checkPreviousOMPAllocateAttribute(
    Sema &S, DSAStackTy *Stack, Expr *RefExpr, VarDecl *VD,
    OMPAllocateDeclAttr::AllocatorTypeTy AllocatorKind, Expr *Allocator) {
  if (!VD->hasAttr<OMPAllocateDeclAttr>())
    return false;
  const auto *A = VD->getAttr<OMPAllocateDeclAttr>();
  Expr *PrevAllocator = A->getAllocator();
  OMPAllocateDeclAttr::AllocatorTypeTy PrevAllocatorKind =
      getAllocatorKind(S, Stack, PrevAllocator);
  bool AllocatorsMatch = AllocatorKind == PrevAllocatorKind;
  if (AllocatorsMatch &&
      AllocatorKind == OMPAllocateDeclAttr::OMPUserDefinedMemAlloc140 &&
      Allocator0 && PrevAllocator0) {
    const Expr *AE = Allocator->IgnoreParenImpCasts();
    const Expr *PAE = PrevAllocator->IgnoreParenImpCasts();
    llvm::FoldingSetNodeID AEId, PAEId;
    AE->Profile(AEId, S.Context, /*Canonical=*/true);
    PAE->Profile(PAEId, S.Context, /*Canonical=*/true);
    AllocatorsMatch = AEId == PAEId;
  }
  if (!AllocatorsMatch) {
    SmallString<256> AllocatorBuffer;
    llvm::raw_svector_ostream AllocatorStream(AllocatorBuffer);
    if (Allocator)
      Allocator->printPretty(AllocatorStream, nullptr, S.getPrintingPolicy());
    SmallString<256> PrevAllocatorBuffer;
    llvm::raw_svector_ostream PrevAllocatorStream(PrevAllocatorBuffer);
    if (PrevAllocator)
      PrevAllocator->printPretty(PrevAllocatorStream, nullptr,
                                 S.getPrintingPolicy());

    SourceLocation AllocatorLoc =
        Allocator ? Allocator->getExprLoc()4 : RefExpr->getExprLoc()2;
    SourceRange AllocatorRange =
        Allocator ? Allocator->getSourceRange()4 : RefExpr->getSourceRange()2;
    SourceLocation PrevAllocatorLoc =
        PrevAllocator ? PrevAllocator->getExprLoc()4 : A->getLocation()2;
    SourceRange PrevAllocatorRange =
        PrevAllocator ? PrevAllocator->getSourceRange()4 : A->getRange()2;
    S.Diag(AllocatorLoc, diag::warn_omp_used_different_allocator)
        << (Allocator ? 14 : 02) << AllocatorStream.str()
        << (PrevAllocator ? 14 : 02) << PrevAllocatorStream.str()
        << AllocatorRange;
    S.Diag(PrevAllocatorLoc, diag::note_omp_previous_allocator)
        << PrevAllocatorRange;
    return true;
  }
  return false;
}

static void
applyOMPAllocateAttribute(Sema &S, VarDecl *VD,
                          OMPAllocateDeclAttr::AllocatorTypeTy AllocatorKind,
                          Expr *Allocator, SourceRange SR) {
  if (VD->hasAttr<OMPAllocateDeclAttr>())
    return;
  if (Allocator &&
      (651Allocator->isTypeDependent()651 || Allocator->isValueDependent()651 ||
       Allocator->isInstantiationDependent() ||
       Allocator->containsUnexpandedParameterPack()))
    return;
  auto *A = OMPAllocateDeclAttr::CreateImplicit(S.Context, AllocatorKind,
                                                Allocator, SR);
  VD->addAttr(A);
  if (ASTMutationListener *ML = S.Context.getASTMutationListener())
    ML->DeclarationMarkedOpenMPAllocate(VD, A);
}

Sema::DeclGroupPtrTy Sema::ActOnOpenMPAllocateDirective(
    SourceLocation Loc, ArrayRef<Expr *> VarList,
    ArrayRef<OMPClause *> Clauses, DeclContext *Owner) {
  assert(Clauses.size() <= 1 && "Expected at most one clause.");
  Expr *Allocator = nullptr;
  if (Clauses.empty()) {
    // OpenMP 5.0, 2.11.3 allocate Directive, Restrictions.
    // allocate directives that appear in a target region must specify an
    // allocator clause unless a requires directive with the dynamic_allocators
    // clause is present in the same compilation unit.
    if (LangOpts.OpenMPIsDevice &&
        !4DSAStack4->hasRequiresDeclWithClause<OMPDynamicAllocatorsClause>())
      targetDiag(Loc, diag::err_expected_allocator_clause);
  } else {
    Allocator = cast<OMPAllocatorClause>(Clauses.back())->getAllocator();
  }
  OMPAllocateDeclAttr::AllocatorTypeTy AllocatorKind =
      getAllocatorKind(*this, DSAStack, Allocator);
  SmallVector<Expr *, 8> Vars;
  for (Expr *RefExpr : VarList) {
    auto *DE = cast<DeclRefExpr>(RefExpr);
    auto *VD = cast<VarDecl>(DE->getDecl());

    // Check if this is a TLS variable or global register.
    if (VD->getTLSKind() != VarDecl::TLS_None ||
        VD->hasAttr<OMPThreadPrivateDeclAttr>()557 ||
        (557VD->getStorageClass() == SC_Register557 && VD->hasAttr<AsmLabelAttr>()4 &&
         !VD->isLocalVarDecl()4))
      continue;

    // If the used several times in the allocate directive, the same allocator
    // must be used.
    if (checkPreviousOMPAllocateAttribute(*this, DSAStack, RefExpr, VD,
                                          AllocatorKind, Allocator))
      continue;

    // OpenMP, 2.11.3 allocate Directive, Restrictions, C / C++
    // If a list item has a static storage type, the allocator expression in the
    // allocator clause must be a constant expression that evaluates to one of
    // the predefined memory allocator values.
    if (Allocator && VD->hasGlobalStorage()267) {
      if (AllocatorKind == OMPAllocateDeclAttr::OMPUserDefinedMemAlloc) {
        Diag(Allocator->getExprLoc(),
             diag::err_omp_expected_predefined_allocator)
            << Allocator->getSourceRange();
        bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
                      VarDecl::DeclarationOnly;
        Diag(VD->getLocation(),
             IsDecl ? diag::note_previous_decl0 : diag::note_defined_here)
            << VD;
        continue;
      }
    }

    Vars.push_back(RefExpr);
    applyOMPAllocateAttribute(*this, VD, AllocatorKind, Allocator,
                              DE->getSourceRange());
  }
  if (Vars.empty())
    return nullptr;
  if (!Owner)
    Owner = getCurLexicalContext();
  auto *D = OMPAllocateDecl::Create(Context, Owner, Loc, Vars, Clauses);
  D->setAccess(AS_public);
  Owner->addDecl(D);
  return DeclGroupPtrTy::make(DeclGroupRef(D));
}

Sema::DeclGroupPtrTy
Sema::ActOnOpenMPRequiresDirective(SourceLocation Loc,
                                   ArrayRef<OMPClause *> ClauseList) {
  OMPRequiresDecl *D = nullptr;
  if (!CurContext->isFileContext()) {
    Diag(Loc, diag::err_omp_invalid_scope) << "requires";
  } else {
    D = CheckOMPRequiresDecl(Loc, ClauseList);
    if (D) {
      CurContext->addDecl(D);
      DSAStack->addRequiresDecl(D);
    }
  }
  return DeclGroupPtrTy::make(DeclGroupRef(D));
}

OMPRequiresDecl *Sema::CheckOMPRequiresDecl(SourceLocation Loc,
                                            ArrayRef<OMPClause *> ClauseList) {
  /// For target specific clauses, the requires directive cannot be
  /// specified after the handling of any of the target regions in the
  /// current compilation unit.
  ArrayRef<SourceLocation> TargetLocations =
      DSAStack->getEncounteredTargetLocs();
  SourceLocation AtomicLoc = DSAStack->getAtomicDirectiveLoc();
  if (!TargetLocations.empty() || !AtomicLoc.isInvalid()81) {
    for (const OMPClause *CNew : ClauseList) {
      // Check if any of the requires clauses affect target regions.
      if (isa<OMPUnifiedSharedMemoryClause>(CNew) ||
          isa<OMPUnifiedAddressClause>(CNew)7 ||
          isa<OMPReverseOffloadClause>(CNew)6 ||
          isa<OMPDynamicAllocatorsClause>(CNew)5) {
        Diag(Loc, diag::err_omp_directive_before_requires)
            << "target" << getOpenMPClauseName(CNew->getClauseKind());
        for (SourceLocation TargetLoc : TargetLocations) {
          Diag(TargetLoc, diag::note_omp_requires_encountered_directive)
              << "target";
        }
      } else if (!AtomicLoc.isInvalid() &&
                 isa<OMPAtomicDefaultMemOrderClause>(CNew)3) {
        Diag(Loc, diag::err_omp_directive_before_requires)
            << "atomic" << getOpenMPClauseName(CNew->getClauseKind());
        Diag(AtomicLoc, diag::note_omp_requires_encountered_directive)
            << "atomic";
      }
    }
  }

  if (!DSAStack->hasDuplicateRequiresClause(ClauseList))
    return OMPRequiresDecl::Create(Context, getCurLexicalContext(), Loc,
                                   ClauseList);
  return nullptr;
}

static void reportOriginalDsa(Sema &SemaRef, const DSAStackTy *Stack,
                              const ValueDecl *D,
                              const DSAStackTy::DSAVarData &DVar,
                              bool IsLoopIterVar = false) {
  if (DVar.RefExpr) {
    SemaRef.Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_explicit_dsa)
        << getOpenMPClauseName(DVar.CKind);
    return;
  }
  enum {
    PDSA_StaticMemberShared,
    PDSA_StaticLocalVarShared,
    PDSA_LoopIterVarPrivate,
    PDSA_LoopIterVarLinear,
    PDSA_LoopIterVarLastprivate,
    PDSA_ConstVarShared,
    PDSA_GlobalVarShared,
    PDSA_TaskVarFirstprivate,
    PDSA_LocalVarPrivate,
    PDSA_Implicit
  } Reason = PDSA_Implicit;
  bool ReportHint = false;
  auto ReportLoc = D->getLocation();
  auto *VD = dyn_cast<VarDecl>(D);
  if (IsLoopIterVar) {
    if (DVar.CKind == OMPC_private)
      Reason = PDSA_LoopIterVarPrivate;
    else if (DVar.CKind == OMPC_lastprivate)
      Reason = PDSA_LoopIterVarLastprivate;
    else
      Reason = PDSA_LoopIterVarLinear;
  } else if (isOpenMPTaskingDirective(DVar.DKind) &&
             DVar.CKind == OMPC_firstprivate4) {
    Reason = PDSA_TaskVarFirstprivate;
    ReportLoc = DVar.ImplicitDSALoc;
  } else if (VD && VD->isStaticLocal())
    Reason = PDSA_StaticLocalVarShared;
  else if (VD && VD->isStaticDataMember())
    Reason = PDSA_StaticMemberShared;
  else if (VD && VD->isFileVarDecl())
    Reason = PDSA_GlobalVarShared;
  else if (D->getType().isConstant(SemaRef.getASTContext()))
    Reason = PDSA_ConstVarShared;
  else if (VD && VD->isLocalVarDecl() && DVar.CKind == OMPC_private) {
    ReportHint = true;
    Reason = PDSA_LocalVarPrivate;
  }
  if (Reason != PDSA_Implicit) {
    SemaRef.Diag(ReportLoc, diag::note_omp_predetermined_dsa)
        << Reason << ReportHint
        << getOpenMPDirectiveName(Stack->getCurrentDirective());
  } else if (72DVar.ImplicitDSALoc.isValid()72) {
    SemaRef.Diag(DVar.ImplicitDSALoc, diag::note_omp_implicit_dsa)
        << getOpenMPClauseName(DVar.CKind);
  }
}

static OpenMPMapClauseKind
getMapClauseKindFromModifier(OpenMPDefaultmapClauseModifier M,
                             bool IsAggregateOrDeclareTarget) {
  OpenMPMapClauseKind Kind = OMPC_MAP_unknown;
  switch (M) {
  case OMPC_DEFAULTMAP_MODIFIER_alloc:
    Kind = OMPC_MAP_alloc;
    break;
  case OMPC_DEFAULTMAP_MODIFIER_to:
    Kind = OMPC_MAP_to;
    break;
  case OMPC_DEFAULTMAP_MODIFIER_from:
    Kind = OMPC_MAP_from;
    break;
  case OMPC_DEFAULTMAP_MODIFIER_tofrom:
    Kind = OMPC_MAP_tofrom;
    break;
  case OMPC_DEFAULTMAP_MODIFIER_firstprivate:
  case OMPC_DEFAULTMAP_MODIFIER_last:
    llvm_unreachable("Unexpected defaultmap implicit behavior");
  case OMPC_DEFAULTMAP_MODIFIER_none:
  case OMPC_DEFAULTMAP_MODIFIER_default:
  case OMPC_DEFAULTMAP_MODIFIER_unknown:
    // IsAggregateOrDeclareTarget could be true if:
    // 1. the implicit behavior for aggregate is tofrom
    // 2. it's a declare target link
    if (IsAggregateOrDeclareTarget) {
      Kind = OMPC_MAP_tofrom;
      break;
    }
    llvm_unreachable("Unexpected defaultmap implicit behavior");
  }
  assert(Kind != OMPC_MAP_unknown && "Expect map kind to be known");
  return Kind;
}

namespace {
class DSAAttrChecker final : public StmtVisitor<DSAAttrChecker, void> {
  DSAStackTy *Stack;
  Sema &SemaRef;
  bool ErrorFound = false;
  bool TryCaptureCXXThisMembers = false;
  CapturedStmt *CS = nullptr;
  llvm::SmallVector<Expr *, 4> ImplicitFirstprivate;
  llvm::SmallVector<Expr *, 4> ImplicitMap[OMPC_MAP_delete];
  Sema::VarsWithInheritedDSAType VarsWithInheritedDSA;
  llvm::SmallDenseSet<const ValueDecl *, 4> ImplicitDeclarations;

  void VisitSubCaptures(OMPExecutableDirective *S) {
    // Check implicitly captured variables.
    if (!S->hasAssociatedStmt() || !S->getAssociatedStmt()51.9k)
      return;
    visitSubCaptures(S->getInnermostCapturedStmt());
    // Try to capture inner this->member references to generate correct mappings
    // and diagnostics.
    if (TryCaptureCXXThisMembers ||
        (51.6kisOpenMPTargetExecutionDirective(Stack->getCurrentDirective())51.6k &&
         llvm::any_of(S->getInnermostCapturedStmt()->captures(),
                      [](const CapturedStmt::Capture &C) {
                        return C.capturesThis();
                      }))) {
      bool SavedTryCaptureCXXThisMembers = TryCaptureCXXThisMembers;
      TryCaptureCXXThisMembers = true;
      Visit(S->getInnermostCapturedStmt()->getCapturedStmt());
      TryCaptureCXXThisMembers = SavedTryCaptureCXXThisMembers;
    }
  }

public:
  void VisitDeclRefExpr(DeclRefExpr *E) {
    if (TryCaptureCXXThisMembers || E->isTypeDependent()657k ||
        E->isValueDependent()657k || E->containsUnexpandedParameterPack()657k ||
        E->isInstantiationDependent()657k)
      return;
    if (auto *VD = dyn_cast<VarDecl>(E->getDecl())) {
      // Check the datasharing rules for the expressions in the clauses.
      if (!CS) {
        if (auto *CED = dyn_cast<OMPCapturedExprDecl>(VD))
          if (!CED->hasAttr<OMPCaptureNoInitAttr>()) {
            Visit(CED->getInit());
            return;
          }
      } else if (VD->isImplicit() || isa<OMPCapturedExprDecl>(VD)593k)
        // Do not analyze internal variables and do not enclose them into
        // implicit clauses.
        return;
      VD = VD->getCanonicalDecl();
      // Skip internally declared variables.
      if (VD->hasLocalStorage() && CS564k && !CS->capturesVariable(VD)564k)
        return;

      DSAStackTy::DSAVarData DVar = Stack->getTopDSA(VD, /*FromParent=*/false);
      // Check if the variable has explicit DSA set and stop analysis if it so.
      if (DVar.RefExpr || !ImplicitDeclarations.insert(VD).second275k)
        return;

      // Skip internally declared static variables.
      llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
          OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD);
      if (VD->hasGlobalStorage() && CS9.13k && !CS->capturesVariable(VD)9.13k &&
          (3.83kStack->hasRequiresDeclWithClause<OMPUnifiedSharedMemoryClause>()3.83k ||
           !Res3.83k || *Res != OMPDeclareTargetDeclAttr::MT_Link102))
        return;

      SourceLocation ELoc = E->getExprLoc();
      OpenMPDirectiveKind DKind = Stack->getCurrentDirective();
      // The default(none) clause requires that each variable that is referenced
      // in the construct, and does not have a predetermined data-sharing
      // attribute, must have its data-sharing attribute explicitly determined
      // by being listed in a data-sharing attribute clause.
      if (DVar.CKind == OMPC_unknown && Stack->getDefaultDSA() == DSA_none125k &&
          isImplicitOrExplicitTaskingRegion(DKind)241 &&
          VarsWithInheritedDSA.count(VD) == 0241) {
        VarsWithInheritedDSA[VD] = E;
        return;
      }

      // OpenMP 5.0 [2.19.7.2, defaultmap clause, Description]
      // If implicit-behavior is none, each variable referenced in the
      // construct that does not have a predetermined data-sharing attribute
      // and does not appear in a to or link clause on a declare target
      // directive must be listed in a data-mapping attribute clause, a
      // data-haring attribute clause (including a data-sharing attribute
      // clause on a combined construct where target. is one of the
      // constituent constructs), or an is_device_ptr clause.
      OpenMPDefaultmapClauseKind ClauseKind =
          getVariableCategoryFromDecl(SemaRef.getLangOpts(), VD);
      if (SemaRef.getLangOpts().OpenMP >= 50) {
        bool IsModifierNone = Stack->getDefaultmapModifier(ClauseKind) ==
                              OMPC_DEFAULTMAP_MODIFIER_none;
        if (DVar.CKind == OMPC_unknown && IsModifierNone31.4k &&
            VarsWithInheritedDSA.count(VD) == 0264 && !Res264) {
          // Only check for data-mapping attribute and is_device_ptr here
          // since we have already make sure that the declaration does not
          // have a data-sharing attribute above
          if (!Stack->checkMappableExprComponentListsForDecl(
                  VD, /*CurrentRegionOnly=*/true,
                  [VD](OMPClauseMappableExprCommon::MappableExprComponentListRef
                           MapExprComponents,
                       OpenMPClauseKind) {
                    auto MI = MapExprComponents.rbegin();
                    auto ME = MapExprComponents.rend();
                    return MI != ME && MI->getAssociatedDeclaration() == VD;
                  })) {
            VarsWithInheritedDSA[VD] = E;
            return;
          }
        }
      }

      if (isOpenMPTargetExecutionDirective(DKind) &&
          !Stack->isLoopControlVariable(VD).first53.1k) {
        if (!Stack->checkMappableExprComponentListsForDecl(
                VD, /*CurrentRegionOnly=*/true,
                [](OMPClauseMappableExprCommon::MappableExprComponentListRef
                       StackComponents,
                   OpenMPClauseKind) {
                  // Variable is used if it has been marked as an array, array
                  // section or the variable iself.
                  return StackComponents.size() == 1 ||
                         std::all_of(
                             std::next(StackComponents.rbegin()),
                             StackComponents.rend(),
                             [](const OMPClauseMappableExprCommon::
                                    MappableComponent &MC) {
                               return MC.getAssociatedDeclaration() ==
                                          nullptr &&
                                      (654isa<OMPArraySectionExpr>(
                                           MC.getAssociatedExpression()) ||
                                       isa<ArraySubscriptExpr>(
                                           MC.getAssociatedExpression()));
                             });
                })) {
          bool IsFirstprivate = false;
          // By default lambdas are captured as firstprivates.
          if (const auto *RD =
                  VD->getType().getNonReferenceType()->getAsCXXRecordDecl())
            IsFirstprivate = RD->isLambda();
          IsFirstprivate =
              IsFirstprivate || (51.7kStack->mustBeFirstprivate(ClauseKind)51.7k && !Res39.0k);
          if (IsFirstprivate) {
            ImplicitFirstprivate.emplace_back(E);
          } else {
            OpenMPDefaultmapClauseModifier M =
                Stack->getDefaultmapModifier(ClauseKind);
            OpenMPMapClauseKind Kind = getMapClauseKindFromModifier(
                M, ClauseKind == OMPC_DEFAULTMAP_aggregate || Res168);
            ImplicitMap[Kind].emplace_back(E);
          }
          return;
        }
      }

      // OpenMP [2.9.3.6, Restrictions, p.2]
      //  A list item that appears in a reduction clause of the innermost
      //  enclosing worksharing or parallel construct may not be accessed in an
      //  explicit task.
      DVar = Stack->hasInnermostDSA(
          VD, [](OpenMPClauseKind C) { return C == OMPC_reduction; }18.0k,
          [](OpenMPDirectiveKind K) {
            return isOpenMPParallelDirective(K) ||
                   isOpenMPWorksharingDirective(K)31.2k || isOpenMPTeamsDirective(K)30.7k;
          },
          /*FromParent=*/true);
      if (isOpenMPTaskingDirective(DKind) && DVar.CKind == OMPC_reduction10.2k) {
        ErrorFound = true;
        SemaRef.Diag(ELoc, diag::err_omp_reduction_in_task);
        reportOriginalDsa(SemaRef, Stack, VD, DVar);
        return;
      }

      // Define implicit data-sharing attributes for task.
      DVar = Stack->getImplicitDSA(VD, /*FromParent=*/false);
      if (isOpenMPTaskingDirective(DKind) && DVar.CKind != OMPC_shared10.2k &&
          !Stack->isLoopControlVariable(VD).first3.76k) {
        ImplicitFirstprivate.push_back(E);
        return;
      }

      // Store implicitly used globals with declare target link for parent
      // target.
      if (!isOpenMPTargetExecutionDirective(DKind) && Res69.0k &&
          *Res == OMPDeclareTargetDeclAttr::MT_Link8) {
        Stack->addToParentTargetRegionLinkGlobals(E);
        return;
      }
    }
  }
  void VisitMemberExpr(MemberExpr *E) {
    if (E->isTypeDependent() || E->isValueDependent() ||
        E->containsUnexpandedParameterPack() || E->isInstantiationDependent())
      return;
    auto *FD = dyn_cast<FieldDecl>(E->getMemberDecl());
    OpenMPDirectiveKind DKind = Stack->getCurrentDirective();
    if (auto *TE = dyn_cast<CXXThisExpr>(E->getBase()->IgnoreParens())) {
      if (!FD)
        return;
      DSAStackTy::DSAVarData DVar = Stack->getTopDSA(FD, /*FromParent=*/false);
      // Check if the variable has explicit DSA set and stop analysis if it
      // so.
      if (DVar.RefExpr || !ImplicitDeclarations.insert(FD).second1.78k)
        return;

      if (isOpenMPTargetExecutionDirective(DKind) &&
          !Stack->isLoopControlVariable(FD).first1.04k &&
          !Stack->checkMappableExprComponentListsForDecl(
              FD, /*CurrentRegionOnly=*/true,
              [](OMPClauseMappableExprCommon::MappableExprComponentListRef
                     StackComponents,
                 OpenMPClauseKind) {
                return isa<CXXThisExpr>(
                    cast<MemberExpr>(
                        StackComponents.back().getAssociatedExpression())
                        ->getBase()
                        ->IgnoreParens());
              })) {
        // OpenMP 4.5 [2.15.5.1, map Clause, Restrictions, C/C++, p.3]
        //  A bit-field cannot appear in a map clause.
        //
        if (FD->isBitField())
          return;

        // Check to see if the member expression is referencing a class that
        // has already been explicitly mapped
        if (Stack->isClassPreviouslyMapped(TE->getType()))
          return;

        OpenMPDefaultmapClauseModifier Modifier =
            Stack->getDefaultmapModifier(OMPC_DEFAULTMAP_aggregate);
        OpenMPMapClauseKind Kind = getMapClauseKindFromModifier(
            Modifier, /*IsAggregateOrDeclareTarget*/ true);
        ImplicitMap[Kind].emplace_back(E);
        return;
      }

      SourceLocation ELoc = E->getExprLoc();
      // OpenMP [2.9.3.6, Restrictions, p.2]
      //  A list item that appears in a reduction clause of the innermost
      //  enclosing worksharing or parallel construct may not be accessed in
      //  an  explicit task.
      DVar = Stack->hasInnermostDSA(
          FD, [](OpenMPClauseKind C) { return C == OMPC_reduction; }8,
          [](OpenMPDirectiveKind K) {
            return isOpenMPParallelDirective(K) ||
                   isOpenMPWorksharingDirective(K)282 || isOpenMPTeamsDirective(K)282;
          },
          /*FromParent=*/true);
      if (isOpenMPTaskingDirective(DKind) && DVar.CKind == OMPC_reduction42) {
        ErrorFound = true;
        SemaRef.Diag(ELoc, diag::err_omp_reduction_in_task);
        reportOriginalDsa(SemaRef, Stack, FD, DVar);
        return;
      }

      // Define implicit data-sharing attributes for task.
      DVar = Stack->getImplicitDSA(FD, /*FromParent=*/false);
      if (isOpenMPTaskingDirective(DKind) && DVar.CKind != OMPC_shared42 &&
          !Stack->isLoopControlVariable(FD).first0) {
        // Check if there is a captured expression for the current field in the
        // region. Do not mark it as firstprivate unless there is no captured
        // expression.
        // TODO: try to make it firstprivate.
        if (DVar.CKind != OMPC_unknown)
          ImplicitFirstprivate.push_back(E);
      }
      return;
    }
    if (isOpenMPTargetExecutionDirective(DKind)) {
      OMPClauseMappableExprCommon::MappableExprComponentList CurComponents;
      if (!checkMapClauseExpressionBase(SemaRef, E, CurComponents, OMPC_map,
                                        /*NoDiagnose=*/true))
        return;
      const auto *VD = cast<ValueDecl>(
          CurComponents.back().getAssociatedDeclaration()->getCanonicalDecl());
      if (!Stack->checkMappableExprComponentListsForDecl(
              VD, /*CurrentRegionOnly=*/true,
              [&CurComponents](
                  OMPClauseMappableExprCommon::MappableExprComponentListRef
                      StackComponents,
                  OpenMPClauseKind) {
                auto CCI = CurComponents.rbegin();
                auto CCE = CurComponents.rend();
                for (const auto &SC : llvm::reverse(StackComponents)) {
                  // Do both expressions have the same kind?
                  if (CCI->getAssociatedExpression()->getStmtClass() !=
                      SC.getAssociatedExpression()->getStmtClass())
                    if (!(isa<OMPArraySectionExpr>(
                              SC.getAssociatedExpression()) &&
                          isa<ArraySubscriptExpr>(
                              CCI->getAssociatedExpression())))
                      return false;

                  const Decl *CCD = CCI->getAssociatedDeclaration();
                  const Decl *SCD = SC.getAssociatedDeclaration();
                  CCD = CCD ? CCD->getCanonicalDecl()452 : nullptr36;
                  SCD = SCD ? SCD->getCanonicalDecl()452 : nullptr36;
                  if (SCD != CCD)
                    return false;
                  std::advance(CCI, 1);
                  if (CCI == CCE)
                    break;
                }
                return true182;
              })) {
        Visit(E->getBase());
      }
    } else if (1.96k!TryCaptureCXXThisMembers1.96k) {
      Visit(E->getBase());
    }
  }
  void VisitOMPExecutableDirective(OMPExecutableDirective *S) {
    for (OMPClause *C : S->clauses()) {
      // Skip analysis of arguments of implicitly defined firstprivate clause
      // for task|target directives.
      // Skip analysis of arguments of implicitly defined map clause for target
      // directives.
      if (C && !((isa<OMPFirstprivateClause>(C) || isa<OMPMapClause>(C)20.4k) &&
                 C->isImplicit()5.76k)) {
        for (Stmt *CC : C->children()) {
          if (CC)
            Visit(CC);
        }
      }
    }
    // Check implicitly captured variables.
    VisitSubCaptures(S);
  }
  void VisitStmt(Stmt *S) {
    for (Stmt *C : S->children()) {
      if (C) {
        // Check implicitly captured variables in the task-based directives to
        // check if they must be firstprivatized.
        Visit(C);
      }
    }
  }

  void visitSubCaptures(CapturedStmt *S) {
    for (const CapturedStmt::Capture &Cap : S->captures()) {
      if (!Cap.capturesVariable() && !Cap.capturesVariableByCopy()64.0k)
        continue;
      VarDecl *VD = Cap.getCapturedVar();
      // Do not try to map the variable if it or its sub-component was mapped
      // already.
      if (isOpenMPTargetExecutionDirective(Stack->getCurrentDirective()) &&
          Stack->checkMappableExprComponentListsForDecl(
              VD, /*CurrentRegionOnly=*/true,
              [](OMPClauseMappableExprCommon::MappableExprComponentListRef,
                 OpenMPClauseKind) { return true; }2.07k))
        continue;
      DeclRefExpr *DRE = buildDeclRefExpr(
          SemaRef, VD, VD->getType().getNonLValueExprType(SemaRef.Context),
          Cap.getLocation(), /*RefersToCapture=*/true);
      Visit(DRE);
    }
  }
  bool isErrorFound() const { return ErrorFound; }
  ArrayRef<Expr *> getImplicitFirstprivate() const {
    return ImplicitFirstprivate;
  }
  ArrayRef<Expr *> getImplicitMap(OpenMPDefaultmapClauseKind Kind) const {
    return ImplicitMap[Kind];
  }
  const Sema::VarsWithInheritedDSAType &getVarsWithInheritedDSA() const {
    return VarsWithInheritedDSA;
  }

  DSAAttrChecker(DSAStackTy *S, Sema &SemaRef, CapturedStmt *CS)
      : Stack(S), SemaRef(SemaRef), ErrorFound(false), CS(CS) {
    // Process declare target link variables for the target directives.
    if (isOpenMPTargetExecutionDirective(S->getCurrentDirective())) {
      for (DeclRefExpr *E : Stack->getLinkGlobals())
        Visit(E);
    }
  }
};
} // namespace

void Sema::ActOnOpenMPRegionStart(OpenMPDirectiveKind DKind, Scope *CurScope) {
  switch (DKind) {
  case OMPD_parallel:
  case OMPD_parallel_for:
  case OMPD_parallel_for_simd:
  case OMPD_parallel_sections:
  case OMPD_parallel_master:
  case OMPD_teams:
  case OMPD_teams_distribute:
  case OMPD_teams_distribute_simd: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params);
    break;
  }
  case OMPD_target_teams:
  case OMPD_target_parallel:
  case OMPD_target_parallel_for:
  case OMPD_target_parallel_for_simd:
  case OMPD_target_teams_distribute:
  case OMPD_target_teams_distribute_simd: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params, /*OpenMPCaptureLevel=*/0);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    Sema::CapturedParamNameType ParamsTarget[] = {
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'target' with no implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsTarget, /*OpenMPCaptureLevel=*/1);
    Sema::CapturedParamNameType ParamsTeamsOrParallel[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'teams' or 'parallel'.  Both regions have
    // the same implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsTeamsOrParallel, /*OpenMPCaptureLevel=*/2);
    break;
  }
  case OMPD_target:
  case OMPD_target_simd: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params, /*OpenMPCaptureLevel=*/0);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             std::make_pair(StringRef(), QualType()),
                             /*OpenMPCaptureLevel=*/1);
    break;
  }
  case OMPD_simd:
  case OMPD_for:
  case OMPD_for_simd:
  case OMPD_sections:
  case OMPD_section:
  case OMPD_single:
  case OMPD_master:
  case OMPD_critical:
  case OMPD_taskgroup:
  case OMPD_distribute:
  case OMPD_distribute_simd:
  case OMPD_ordered:
  case OMPD_atomic:
  case OMPD_target_data: {
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params);
    break;
  }
  case OMPD_task: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    break;
  }
  case OMPD_taskloop:
  case OMPD_taskloop_simd:
  case OMPD_master_taskloop:
  case OMPD_master_taskloop_simd: {
    QualType KmpInt32Ty =
        Context.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1)
            .withConst();
    QualType KmpUInt64Ty =
        Context.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/0)
            .withConst();
    QualType KmpInt64Ty =
        Context.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/1)
            .withConst();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(".lb.", KmpUInt64Ty),
        std::make_pair(".ub.", KmpUInt64Ty),
        std::make_pair(".st.", KmpInt64Ty),
        std::make_pair(".liter.", KmpInt32Ty),
        std::make_pair(".reductions.", VoidPtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    break;
  }
  case OMPD_parallel_master_taskloop:
  case OMPD_parallel_master_taskloop_simd: {
    QualType KmpInt32Ty =
        Context.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1)
            .withConst();
    QualType KmpUInt64Ty =
        Context.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/0)
            .withConst();
    QualType KmpInt64Ty =
        Context.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/1)
            .withConst();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    Sema::CapturedParamNameType ParamsParallel[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'parallel'.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsParallel, /*OpenMPCaptureLevel=*/1);
    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(".lb.", KmpUInt64Ty),
        std::make_pair(".ub.", KmpUInt64Ty),
        std::make_pair(".st.", KmpInt64Ty),
        std::make_pair(".liter.", KmpInt32Ty),
        std::make_pair(".reductions.", VoidPtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params, /*OpenMPCaptureLevel=*/2);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    break;
  }
  case OMPD_distribute_parallel_for_simd:
  case OMPD_distribute_parallel_for: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(".previous.lb.", Context.getSizeType().withConst()),
        std::make_pair(".previous.ub.", Context.getSizeType().withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params);
    break;
  }
  case OMPD_target_teams_distribute_parallel_for:
  case OMPD_target_teams_distribute_parallel_for_simd: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();

    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params, /*OpenMPCaptureLevel=*/0);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    Sema::CapturedParamNameType ParamsTarget[] = {
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'target' with no implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsTarget, /*OpenMPCaptureLevel=*/1);

    Sema::CapturedParamNameType ParamsTeams[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'target' with no implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsTeams, /*OpenMPCaptureLevel=*/2);

    Sema::CapturedParamNameType ParamsParallel[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(".previous.lb.", Context.getSizeType().withConst()),
        std::make_pair(".previous.ub.", Context.getSizeType().withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'teams' or 'parallel'.  Both regions have
    // the same implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsParallel, /*OpenMPCaptureLevel=*/3);
    break;
  }

  case OMPD_teams_distribute_parallel_for:
  case OMPD_teams_distribute_parallel_for_simd: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();

    Sema::CapturedParamNameType ParamsTeams[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'target' with no implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsTeams, /*OpenMPCaptureLevel=*/0);

    Sema::CapturedParamNameType ParamsParallel[] = {
        std::make_pair(".global_tid.", KmpInt32PtrTy),
        std::make_pair(".bound_tid.", KmpInt32PtrTy),
        std::make_pair(".previous.lb.", Context.getSizeType().withConst()),
        std::make_pair(".previous.ub.", Context.getSizeType().withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    // Start a captured region for 'teams' or 'parallel'.  Both regions have
    // the same implicit parameters.
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             ParamsParallel, /*OpenMPCaptureLevel=*/1);
    break;
  }
  case OMPD_target_update:
  case OMPD_target_enter_data:
  case OMPD_target_exit_data: {
    QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1).withConst();
    QualType VoidPtrTy = Context.VoidPtrTy.withConst().withRestrict();
    QualType KmpInt32PtrTy =
        Context.getPointerType(KmpInt32Ty).withConst().withRestrict();
    QualType Args[] = {VoidPtrTy};
    FunctionProtoType::ExtProtoInfo EPI;
    EPI.Variadic = true;
    QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
    Sema::CapturedParamNameType Params[] = {
        std::make_pair(".global_tid.", KmpInt32Ty),
        std::make_pair(".part_id.", KmpInt32PtrTy),
        std::make_pair(".privates.", VoidPtrTy),
        std::make_pair(
            ".copy_fn.",
            Context.getPointerType(CopyFnType).withConst().withRestrict()),
        std::make_pair(".task_t.", Context.VoidPtrTy.withConst()),
        std::make_pair(StringRef(), QualType()) // __context with shared vars
    };
    ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
                             Params);
    // Mark this captured region as inlined, because we don't use outlined
    // function directly.
    getCurCapturedRegion()->TheCapturedDecl->addAttr(
        AlwaysInlineAttr::CreateImplicit(
            Context, {}, AttributeCommonInfo::AS_Keyword,
            AlwaysInlineAttr::Keyword_forceinline));
    break;
  }
  case OMPD_threadprivate:
  case OMPD_allocate:
  case OMPD_taskyield:
  case OMPD_barrier:
  case OMPD_taskwait:
  case OMPD_cancellation_point:
  case OMPD_cancel:
  case OMPD_flush:
  case OMPD_declare_reduction:
  case OMPD_declare_mapper:
  case OMPD_declare_simd:
  case OMPD_declare_target:
  case OMPD_end_declare_target:
  case OMPD_requires:
  case OMPD_declare_variant:
    llvm_unreachable("OpenMP Directive is not allowed");
  case OMPD_unknown:
    llvm_unreachable("Unknown OpenMP directive");
  }
}

int Sema::getNumberOfConstructScopes(unsigned Level) const {
  return getOpenMPCaptureLevels(DSAStack->getDirective(Level));
}

int Sema::getOpenMPCaptureLevels(OpenMPDirectiveKind DKind) {
  SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
  getOpenMPCaptureRegions(CaptureRegions, DKind);
  return CaptureRegions.size();
}

static OMPCapturedExprDecl *buildCaptureDecl(Sema &S, IdentifierInfo *Id,
                                             Expr *CaptureExpr, bool WithInit,
                                             bool AsExpression) {
  assert(CaptureExpr);
  ASTContext &C = S.getASTContext();
  Expr *Init = AsExpression ? CaptureExpr50.6k : CaptureExpr->IgnoreImpCasts()2.53k;
  QualType Ty = Init->getType();
  if (CaptureExpr->getObjectKind() == OK_Ordinary && CaptureExpr->isGLValue()53.0k) {
    if (S.getLangOpts().CPlusPlus) {
      Ty = C.getLValueReferenceType(Ty);
    } else {
      Ty = C.getPointerType(Ty);
      ExprResult Res =
          S.CreateBuiltinUnaryOp(CaptureExpr->getExprLoc(), UO_AddrOf, Init);
      if (!Res.isUsable())
        return nullptr;
      Init = Res.get();
    }
    WithInit = true;
  }
  auto *CED = OMPCapturedExprDecl::Create(C, S.CurContext, Id, Ty,
                                          CaptureExpr->getBeginLoc());
  if (!WithInit)
    CED->addAttr(OMPCaptureNoInitAttr::CreateImplicit(C));
  S.CurContext->addHiddenDecl(CED);
  S.AddInitializerToDecl(CED, Init, /*DirectInit=*/false);
  return CED;
}

static DeclRefExpr *buildCapture(Sema &S, ValueDecl *D, Expr *CaptureExpr,
                                 bool WithInit) {
  OMPCapturedExprDecl *CD;
  if (VarDecl *VD = S.isOpenMPCapturedDecl(D))
    CD = cast<OMPCapturedExprDecl>(VD);
  else
    CD = buildCaptureDecl(S, D->getIdentifier(), CaptureExpr, WithInit,
                          /*AsExpression=*/false);
  return buildDeclRefExpr(S, CD, CD->getType().getNonReferenceType(),
                          CaptureExpr->getExprLoc());
}

static ExprResult buildCapture(Sema &S, Expr *CaptureExpr, DeclRefExpr *&Ref) {
  CaptureExpr = S.DefaultLvalueConversion(CaptureExpr).get();
  if (!Ref) {
    OMPCapturedExprDecl *CD = buildCaptureDecl(
        S, &S.getASTContext().Idents.get(".capture_expr."), CaptureExpr,
        /*WithInit=*/true, /*AsExpression=*/true);
    Ref = buildDeclRefExpr(S, CD, CD->getType().getNonReferenceType(),
                           CaptureExpr->getExprLoc());
  }
  ExprResult Res = Ref;
  if (!S.getLangOpts().CPlusPlus &&
      CaptureExpr->getObjectKind() == OK_Ordinary1.08k && CaptureExpr->isGLValue()1.08k &&
      Ref->getType()->isPointerType()0) {
    Res = S.CreateBuiltinUnaryOp(CaptureExpr->getExprLoc(), UO_Deref, Ref);
    if (!Res.isUsable())
      return ExprError();
  }
  return S.DefaultLvalueConversion(Res.get());
}

namespace {
// OpenMP directives parsed in this section are represented as a
// CapturedStatement with an associated statement.  If a syntax error
// is detected during the parsing of the associated statement, the
// compiler must abort processing and close the CapturedStatement.
//
// Combined directives such as 'target parallel' have more than one
// nested CapturedStatements.  This RAII ensures that we unwind out
// of all the nested CapturedStatements when an error is found.
class CaptureRegionUnwinderRAII {
private:
  Sema &S;
  bool &ErrorFound;
  OpenMPDirectiveKind DKind = OMPD_unknown;

public:
  CaptureRegionUnwinderRAII(Sema &S, bool &ErrorFound,
                            OpenMPDirectiveKind DKind)
      : S(S), ErrorFound(ErrorFound), DKind(DKind) {}
  ~CaptureRegionUnwinderRAII() {
    if (ErrorFound) {
      int ThisCaptureLevel = S.getOpenMPCaptureLevels(DKind);
      while (--ThisCaptureLevel >= 0)
        S.ActOnCapturedRegionError();
    }
  }
};
} // namespace

void Sema::tryCaptureOpenMPLambdas(ValueDecl *V) {
  // Capture variables captured by reference in lambdas for target-based
  // directives.
  if (!CurContext->isDependentContext() &&
      (isOpenMPTargetExecutionDirective(DSAStack->getCurrentDirective()) ||
       isOpenMPTargetDataManagementDirective(
           DSAStack->getCurrentDirective()))) {
    QualType Type = V->getType();
    if (const auto *RD = Type.getCanonicalType()
                             .getNonReferenceType()
                             ->getAsCXXRecordDecl()) {
      bool SavedForceCaptureByReferenceInTargetExecutable =
          DSAStack->isForceCaptureByReferenceInTargetExecutable();
      DSAStack->setForceCaptureByReferenceInTargetExecutable(
          /*V=*/true);
      if (RD->isLambda()) {
        llvm::DenseMap<const VarDecl *, FieldDecl *> Captures;
        FieldDecl *ThisCapture;
        RD->getCaptureFields(Captures, ThisCapture);
        for (const LambdaCapture &LC : RD->captures()) {
          if (LC.getCaptureKind() == LCK_ByRef) {
            VarDecl *VD = LC.getCapturedVar();
            DeclContext *VDC = VD->getDeclContext();
            if (!VDC->Encloses(CurContext))
              continue;
            MarkVariableReferenced(LC.getLocation(), VD);
          } else if (128LC.getCaptureKind() == LCK_This128) {
            QualType ThisTy = getCurrentThisType();
            if (!ThisTy.isNull() &&
                Context.typesAreCompatible(ThisTy, ThisCapture->getType())28)
              CheckCXXThisCapture(LC.getLocation());
          }
        }
      }
      DSAStack->setForceCaptureByReferenceInTargetExecutable(
          SavedForceCaptureByReferenceInTargetExecutable);
    }
  }
}

static bool checkOrderedOrderSpecified(Sema &S,
                                       const ArrayRef<OMPClause *> Clauses) {
  const OMPOrderedClause *Ordered = nullptr;
  const OMPOrderClause *Order = nullptr;

  for (const OMPClause *Clause : Clauses) {
    if (Clause->getClauseKind() == OMPC_ordered)
      Ordered = cast<OMPOrderedClause>(Clause);
    else if (Clause->getClauseKind() == OMPC_order) {
      Order = cast<OMPOrderClause>(Clause);
      if (Order->getKind() != OMPC_ORDER_concurrent)
        Order = nullptr;
    }
    if (Ordered && Order1.37k)
      break;
  }

  if (Ordered && Order1.03k) {
    S.Diag(Order->getKindKwLoc(),
           diag::err_omp_simple_clause_incompatible_with_ordered)
        << getOpenMPClauseName(OMPC_order)
        << getOpenMPSimpleClauseTypeName(OMPC_order, OMPC_ORDER_concurrent)
        << SourceRange(Order->getBeginLoc(), Order->getEndLoc());
    S.Diag(Ordered->getBeginLoc(), diag::note_omp_ordered_param)
        << 0 << SourceRange(Ordered->getBeginLoc(), Ordered->getEndLoc());
    return true;
  }
  return false;
}

StmtResult Sema::ActOnOpenMPRegionEnd(StmtResult S,
                                      ArrayRef<OMPClause *> Clauses) {
  bool ErrorFound = false;
  CaptureRegionUnwinderRAII CaptureRegionUnwinder(
      *this, ErrorFound, DSAStack->getCurrentDirective());
  if (!S.isUsable()) {
    ErrorFound = true;
    return StmtError();
  }

  SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
  getOpenMPCaptureRegions(CaptureRegions, DSAStack->getCurrentDirective());
  OMPOrderedClause *OC = nullptr;
  OMPScheduleClause *SC = nullptr;
  SmallVector<const OMPLinearClause *, 4> LCs;
  SmallVector<const OMPClauseWithPreInit *, 4> PICs;
  // This is required for proper codegen.
  for (OMPClause *Clause : Clauses) {
    if (isOpenMPTaskingDirective(DSAStack->getCurrentDirective()) &&
        Clause->getClauseKind() == OMPC_in_reduction13.6k) {
      // Capture taskgroup task_reduction descriptors inside the tasking regions
      // with the corresponding in_reduction items.
      auto *IRC = cast<OMPInReductionClause>(Clause);
      for (Expr *E : IRC->taskgroup_descriptors())
        if (E)
          MarkDeclarationsReferencedInExpr(E);
    }
    if (isOpenMPPrivate(Clause->getClauseKind()) ||
        Clause->getClauseKind() == OMPC_copyprivate64.3k ||
        (64.1kgetLangOpts().OpenMPUseTLS64.1k &&
         getASTContext().getTargetInfo().isTLSSupported()33.7k &&
         Clause->getClauseKind() == OMPC_copyin32.0k)) {
      DSAStack->setForceVarCapturing(Clause->getClauseKind() == OMPC_copyin);
      // Mark all variables in private list clauses as used in inner region.
      for (Stmt *VarRef : Clause->children()) {
        if (auto *E = cast_or_null<Expr>(VarRef)) {
          MarkDeclarationsReferencedInExpr(E);
        }
      }
      DSAStack->setForceVarCapturing(/*V=*/false);
    } else if (CaptureRegions.size() > 1 ||
               CaptureRegions.back() != OMPD_unknown32.4k) {
      if (auto *C = OMPClauseWithPreInit::get(Clause))
        PICs.push_back(C);
      if (auto *C = OMPClauseWithPostUpdate::get(Clause)) {
        if (Expr *E = C->getPostUpdateExpr())
          MarkDeclarationsReferencedInExpr(E);
      }
    }
    if (Clause->getClauseKind() == OMPC_schedule)
      SC = cast<OMPScheduleClause>(Clause);
    else if (Clause->getClauseKind() == OMPC_ordered)
      OC = cast<OMPOrderedClause>(Clause);
    else if (Clause->getClauseKind() == OMPC_linear)
      LCs.push_back(cast<OMPLinearClause>(Clause));
  }
  // Capture allocator expressions if used.
  for (Expr *E : DSAStack->getInnerAllocators())
    MarkDeclarationsReferencedInExpr(E);
  // OpenMP, 2.7.1 Loop Construct, Restrictions
  // The nonmonotonic modifier cannot be specified if an ordered clause is
  // specified.
  if (SC &&
      (3.01kSC->getFirstScheduleModifier() == OMPC_SCHEDULE_MODIFIER_nonmonotonic3.01k ||
       SC->getSecondScheduleModifier() ==
           OMPC_SCHEDULE_MODIFIER_nonmonotonic) &&
      OC32) {
    Diag(SC->getFirstScheduleModifier() == OMPC_SCHEDULE_MODIFIER_nonmonotonic
             ? SC->getFirstScheduleModifierLoc()
             : SC->getSecondScheduleModifierLoc()0,
         diag::err_omp_simple_clause_incompatible_with_ordered)
        << getOpenMPClauseName(OMPC_schedule)
        << getOpenMPSimpleClauseTypeName(OMPC_schedule,
                                         OMPC_SCHEDULE_MODIFIER_nonmonotonic)
        << SourceRange(OC->getBeginLoc(), OC->getEndLoc());
    ErrorFound = true;
  }
  // OpenMP 5.0, 2.9.2 Worksharing-Loop Construct, Restrictions.
  // If an order(concurrent) clause is present, an ordered clause may not appear
  // on the same directive.
  if (checkOrderedOrderSpecified(*this, Clauses))
    ErrorFound = true;
  if (!LCs.empty() && OC2.51k && OC->getNumForLoops()32) {
    for (const OMPLinearClause *C : LCs) {
      Diag(C->getBeginLoc(), diag::err_omp_linear_ordered)
          << SourceRange(OC->getBeginLoc(), OC->getEndLoc());
    }
    ErrorFound = true;
  }
  if (isOpenMPWorksharingDirective(DSAStack->getCurrentDirective()) &&
      isOpenMPSimdDirective(77.3kDSAStack77.3k->getCurrentDirective()) && OC36.1k &&
      OC->getNumForLoops()222) {
    Diag(OC->getBeginLoc(), diag::err_omp_ordered_simd)
        << getOpenMPDirectiveName(DSAStack->getCurrentDirective());
    ErrorFound = true;
  }
  if (ErrorFound) {
    return StmtError();
  }
  StmtResult SR = S;
  unsigned CompletedRegions = 0;
  for (OpenMPDirectiveKind ThisCaptureRegion : llvm::reverse(CaptureRegions)) {
    // Mark all variables in private list clauses as used in inner region.
    // Required for proper codegen of combined directives.
    // TODO: add processing for other clauses.
    if (ThisCaptureRegion != OMPD_unknown) {
      for (const clang::OMPClauseWithPreInit *C : PICs) {
        OpenMPDirectiveKind CaptureRegion = C->getCaptureRegion();
        // Find the particular capture region for the clause if the
        // directive is a combined one with multiple capture regions.
        // If the directive is not a combined one, the capture region
        // associated with the clause is OMPD_unknown and is generated
        // only once.
        if (CaptureRegion == ThisCaptureRegion ||
            CaptureRegion == OMPD_unknown33.4k) {
          if (auto *DS = cast_or_null<DeclStmt>(C->getPreInitStmt())) {
            for (Decl *D : DS->decls())
              MarkVariableReferenced(D->getLocation(), cast<VarDecl>(D));
          }
        }
      }
    }
    if (++CompletedRegions == CaptureRegions.size())
      DSAStack244k->setBodyComplete()244k;
    SR = ActOnCapturedRegionEnd(SR.get());
  }
  return SR;
}

static bool checkCancelRegion(Sema &SemaRef, OpenMPDirectiveKind CurrentRegion,
                              OpenMPDirectiveKind CancelRegion,
                              SourceLocation StartLoc) {
  // CancelRegion is only needed for cancel and cancellation_point.
  if (CurrentRegion != OMPD_cancel && CurrentRegion != OMPD_cancellation_point244k)
    return false;

  if (CancelRegion == OMPD_parallel || CancelRegion == OMPD_for513 ||
      CancelRegion == OMPD_sections342 || CancelRegion == OMPD_taskgroup234)
    return false;

  SemaRef.Diag(StartLoc, diag::err_omp_wrong_cancel_region)
      << getOpenMPDirectiveName(CancelRegion);
  return true;
}

static bool checkNestingOfRegions(Sema &SemaRef, const DSAStackTy *Stack,
                                  OpenMPDirectiveKind CurrentRegion,
                                  const DeclarationNameInfo &CurrentName,
                                  OpenMPDirectiveKind CancelRegion,
                                  SourceLocation StartLoc) {
  if (Stack->getCurScope()) {
    OpenMPDirectiveKind ParentRegion = Stack->getParentDirective();
    OpenMPDirectiveKind OffendingRegion = ParentRegion;
    bool NestingProhibited = false;
    bool CloseNesting = true;
    bool OrphanSeen = false;
    enum {
      NoRecommend,
      ShouldBeInParallelRegion,
      ShouldBeInOrderedRegion,
      ShouldBeInTargetRegion,
      ShouldBeInTeamsRegion
    } Recommend = NoRecommend;
    if (isOpenMPSimdDirective(ParentRegion) &&
        (4.79k(4.79kSemaRef.LangOpts.OpenMP <= 454.79k && CurrentRegion != OMPD_ordered3.22k) ||
         (1.79kSemaRef.LangOpts.OpenMP >= 501.79k && CurrentRegion != OMPD_ordered1.56k &&
          CurrentRegion != OMPD_simd1.51k && CurrentRegion != OMPD_atomic1.47k))) {
      // OpenMP [2.16, Nesting of Regions]
      // OpenMP constructs may not be nested inside a simd region.
      // OpenMP [2.8.1,simd Construct, Restrictions]
      // An ordered construct with the simd clause is the only OpenMP
      // construct that can appear in the simd region.
      // Allowing a SIMD construct nested in another SIMD construct is an
      // extension. The OpenMP 4.5 spec does not allow it. Issue a warning
      // message.
      // OpenMP 5.0 [2.9.3.1, simd Construct, Restrictions]
      // The only OpenMP constructs that can be encountered during execution of
      // a simd region are the atomic construct, the loop construct, the simd
      // construct and the ordered construct with the simd clause.
      SemaRef.Diag(StartLoc, (CurrentRegion != OMPD_simd)
                                 ? diag::err_omp_prohibited_region_simd4.36k
                                 : diag::warn_omp_nesting_simd76)
          << (SemaRef.LangOpts.OpenMP >= 50 ? 11.43k : 03.00k);
      return CurrentRegion != OMPD_simd;
    }
    if (ParentRegion == OMPD_atomic) {
      // OpenMP [2.16, Nesting of Regions]
      // OpenMP constructs may not be nested inside an atomic region.
      SemaRef.Diag(StartLoc, diag::err_omp_prohibited_region_atomic);
      return true;
    }
    if (CurrentRegion == OMPD_section) {
      // OpenMP [2.7.2, sections Construct, Restrictions]
      // Orphaned section directives are prohibited. That is, the section
      // directives must appear within the sections construct and must not be
      // encountered elsewhere in the sections region.
      if (ParentRegion != OMPD_sections &&
          ParentRegion != OMPD_parallel_sections294) {
        SemaRef.Diag(StartLoc, diag::err_omp_orphaned_section_directive)
            << (ParentRegion != OMPD_unknown)
            << getOpenMPDirectiveName(ParentRegion);
        return true;
      }
      return false;
    }
    // Allow some constructs (except teams and cancellation constructs) to be
    // orphaned (they could be used in functions, called from OpenMP regions
    // with the required preconditions).
    if (ParentRegion == OMPD_unknown &&
        !isOpenMPNestingTeamsDirective(CurrentRegion)111k &&
        CurrentRegion != OMPD_cancellation_point110k &&
        CurrentRegion != OMPD_cancel110k)
      return false;
    if (CurrentRegion == OMPD_cancellation_point ||
        CurrentRegion == OMPD_cancel62.0k) {
      // OpenMP [2.16, Nesting of Regions]
      // A cancellation point construct for which construct-type-clause is
      // taskgroup must be nested inside a task construct. A cancellation
      // point construct for which construct-type-clause is not taskgroup must
      // be closely nested inside an OpenMP construct that matches the type
      // specified in construct-type-clause.
      // A cancel construct for which construct-type-clause is taskgroup must be
      // nested inside a task construct. A cancel construct for which
      // construct-type-clause is not taskgroup must be closely nested inside an
      // OpenMP construct that matches the type specified in
      // construct-type-clause.
      NestingProhibited =
          !((CancelRegion == OMPD_parallel &&
             (168ParentRegion == OMPD_parallel168 ||
              ParentRegion == OMPD_target_parallel64)) ||
            (489CancelRegion == OMPD_for489 &&
             (159ParentRegion == OMPD_for159 || ParentRegion == OMPD_parallel_for135 ||
              ParentRegion == OMPD_target_parallel_for121 ||
              ParentRegion == OMPD_distribute_parallel_for81 ||
              ParentRegion == OMPD_teams_distribute_parallel_for61 ||
              ParentRegion == OMPD_target_teams_distribute_parallel_for49)) ||
            (354CancelRegion == OMPD_taskgroup354 &&
             (158ParentRegion == OMPD_task158 ||
              (132SemaRef.getLangOpts().OpenMP >= 50132 &&
               (84ParentRegion == OMPD_taskloop84 ||
                ParentRegion == OMPD_master_taskloop56 ||
                ParentRegion == OMPD_parallel_master_taskloop28)))) ||
            (244CancelRegion == OMPD_sections244 &&
             (108ParentRegion == OMPD_section108 || ParentRegion == OMPD_sections84 ||
              ParentRegion == OMPD_parallel_sections52)));
      OrphanSeen = ParentRegion == OMPD_unknown;
    } else if (CurrentRegion == OMPD_master) {
      // OpenMP [2.16, Nesting of Regions]
      // A master region may not be closely nested inside a worksharing,
      // atomic, or explicit task region.
      NestingProhibited = isOpenMPWorksharingDirective(ParentRegion) ||
                          isOpenMPTaskingDirective(ParentRegion)226;
    } else if (CurrentRegion == OMPD_critical && CurrentName.getName()425) {
      // OpenMP [2.16, Nesting of Regions]
      // A critical region may not be nested (closely or otherwise) inside a
      // critical region with the same name. Note that this restriction is not
      // sufficient to prevent deadlock.
      SourceLocation PreviousCriticalLoc;
      bool DeadLock = Stack->hasDirective(
          [CurrentName, &PreviousCriticalLoc](OpenMPDirectiveKind K,
                                              const DeclarationNameInfo &DNI,
                                              SourceLocation Loc) {
            if (K == OMPD_critical && DNI.getName() == CurrentName.getName()130) {
              PreviousCriticalLoc = Loc;
              return true;
            }
            return false;
          },
          false /* skip top directive */);
      if (DeadLock) {
        SemaRef.Diag(StartLoc,
                     diag::err_omp_prohibited_region_critical_same_name)
            << CurrentName.getName();
        if (PreviousCriticalLoc.isValid())
          SemaRef.Diag(PreviousCriticalLoc,
                       diag::note_omp_previous_critical_region);
        return true;
      }
    } else if (CurrentRegion == OMPD_barrier) {
      // OpenMP [2.16, Nesting of Regions]
      // A barrier region may not be closely nested inside a worksharing,
      // explicit task, critical, ordered, atomic, or master region.
      NestingProhibited = isOpenMPWorksharingDirective(ParentRegion) ||
                          isOpenMPTaskingDirective(ParentRegion)173 ||
                          ParentRegion == OMPD_master149 ||
                          ParentRegion == OMPD_parallel_master137 ||
                          ParentRegion == OMPD_critical131 ||
                          ParentRegion == OMPD_ordered119;
    } else if (isOpenMPWorksharingDirective(CurrentRegion) &&
               !isOpenMPParallelDirective(CurrentRegion)22.3k &&
               !isOpenMPTeamsDirective(CurrentRegion)6.36k) {
      // OpenMP [2.16, Nesting of Regions]
      // A worksharing region may not be closely nested inside a worksharing,
      // explicit task, critical, ordered, atomic, or master region.
      NestingProhibited = isOpenMPWorksharingDirective(ParentRegion) ||
                          isOpenMPTaskingDirective(ParentRegion)5.88k ||
                          ParentRegion == OMPD_master5.78k ||
                          ParentRegion == OMPD_parallel_master5.73k ||
                          ParentRegion == OMPD_critical5.71k ||
                          ParentRegion == OMPD_ordered5.66k;
      Recommend = ShouldBeInParallelRegion;
    } else if (CurrentRegion == OMPD_ordered) {
      // OpenMP [2.16, Nesting of Regions]
      // An ordered region may not be closely nested inside a critical,
      // atomic, or explicit task region.
      // An ordered region must be closely nested inside a loop region (or
      // parallel loop region) with an ordered clause.
      // OpenMP [2.8.1,simd Construct, Restrictions]
      // An ordered construct with the simd clause is the only OpenMP construct
      // that can appear in the simd region.
      NestingProhibited = ParentRegion == OMPD_critical ||
                          isOpenMPTaskingDirective(ParentRegion)1.03k ||
                          !(1.01kisOpenMPSimdDirective(ParentRegion)1.01k ||
                            Stack->isParentOrderedRegion()736);
      Recommend = ShouldBeInOrderedRegion;
    } else if (isOpenMPNestingTeamsDirective(CurrentRegion)) {
      // OpenMP [2.16, Nesting of Regions]
      // If specified, a teams construct must be contained within a target
      // construct.
      NestingProhibited =
          (SemaRef.LangOpts.OpenMP <= 45 && ParentRegion != OMPD_target18.8k) ||
          (23.1kSemaRef.LangOpts.OpenMP >= 5023.1k && ParentRegion != OMPD_unknown5.23k &&
           ParentRegion != OMPD_target5.06k);
      OrphanSeen = ParentRegion == OMPD_unknown;
      Recommend = ShouldBeInTargetRegion;
    }
    if (62.2k!NestingProhibited62.2k &&
        !isOpenMPTargetExecutionDirective(CurrentRegion)59.3k &&
        !isOpenMPTargetDataManagementDirective(CurrentRegion)55.4k &&
        (54.1kParentRegion == OMPD_teams54.1k || ParentRegion == OMPD_target_teams44.0k)) {
      // OpenMP [2.16, Nesting of Regions]
      // distribute, parallel, parallel sections, parallel workshare, and the
      // parallel loop and parallel loop SIMD constructs are the only OpenMP
      // constructs that can be closely nested in the teams region.
      NestingProhibited = !isOpenMPParallelDirective(CurrentRegion) &&
                          !isOpenMPDistributeDirective(CurrentRegion)4.14k;
      Recommend = ShouldBeInParallelRegion;
    }
    if (!NestingProhibited &&
        isOpenMPNestingDistributeDirective(CurrentRegion)59.0k) {
      // OpenMP 4.5 [2.17 Nesting of Regions]
      // The region associated with the distribute construct must be strictly
      // nested inside a teams region
      NestingProhibited =
          (ParentRegion != OMPD_teams && ParentRegion != OMPD_target_teams1.19k);
      Recommend = ShouldBeInTeamsRegion;
    }
    if (!NestingProhibited &&
        (58.1kisOpenMPTargetExecutionDirective(CurrentRegion)58.1k ||
         isOpenMPTargetDataManagementDirective(CurrentRegion)54.1k)) {
      // OpenMP 4.5 [2.17 Nesting of Regions]
      // If a target, target update, target data, target enter data, or
      // target exit data construct is encountered during execution of a
      // target region, the behavior is unspecified.
      NestingProhibited = Stack->hasDirective(
          [&OffendingRegion](OpenMPDirectiveKind K, const DeclarationNameInfo &,
                             SourceLocation) {
            if (isOpenMPTargetExecutionDirective(K)) {
              OffendingRegion = K;
              return true;
            }
            return false;
          },
          false /* don't skip top directive */);
      CloseNesting = false;
    }
    if (NestingProhibited) {
      if (OrphanSeen) {
        SemaRef.Diag(StartLoc, diag::err_omp_orphaned_device_directive)
            << getOpenMPDirectiveName(CurrentRegion) << Recommend;
      } else {
        SemaRef.Diag(StartLoc, diag::err_omp_prohibited_region)
            << CloseNesting << getOpenMPDirectiveName(OffendingRegion)
            << Recommend << getOpenMPDirectiveName(CurrentRegion);
      }
      return true;
    }
  }
  return false;
}

struct Kind2Unsigned {
  using argument_type = OpenMPDirectiveKind;
  unsigned operator()(argument_type DK) { return unsigned(DK); }
};
static bool checkIfClauses(Sema &S, OpenMPDirectiveKind Kind,
                           ArrayRef<OMPClause *> Clauses,
                           ArrayRef<OpenMPDirectiveKind> AllowedNameModifiers) {
  bool ErrorFound = false;
  unsigned NamedModifiersNumber = 0;
  llvm::IndexedMap<const OMPIfClause *, Kind2Unsigned> FoundNameModifiers;
  FoundNameModifiers.resize(unsigned(OMPD_unknown) + 1);
  SmallVector<SourceLocation, 4> NameModifierLoc;
  for (const OMPClause *C : Clauses) {
    if (const auto *IC = dyn_cast_or_null<OMPIfClause>(C)) {
      // At most one if clause without a directive-name-modifier can appear on
      // the directive.
      OpenMPDirectiveKind CurNM = IC->getNameModifier();
      if (FoundNameModifiers[CurNM]) {
        S.Diag(C->getBeginLoc(), diag::err_omp_more_one_clause)
            << getOpenMPDirectiveName(Kind) << getOpenMPClauseName(OMPC_if)
            << (CurNM != OMPD_unknown) << getOpenMPDirectiveName(CurNM);
        ErrorFound = true;
      } else if (CurNM != OMPD_unknown) {
        NameModifierLoc.push_back(IC->getNameModifierLoc());
        ++NamedModifiersNumber;
      }
      FoundNameModifiers[CurNM] = IC;
      if (CurNM == OMPD_unknown)
        continue;
      // Check if the specified name modifier is allowed for the current
      // directive.
      // At most one if clause with the particular directive-name-modifier can
      // appear on the directive.
      bool MatchFound = false;
      for (auto NM : AllowedNameModifiers) {
        if (CurNM == NM) {
          MatchFound = true;
          break;
        }
      }
      if (!MatchFound) {
        S.Diag(IC->getNameModifierLoc(),
               diag::err_omp_wrong_if_directive_name_modifier)
            << getOpenMPDirectiveName(CurNM) << getOpenMPDirectiveName(Kind);
        ErrorFound = true;
      }
    }
  }
  // If any if clause on the directive includes a directive-name-modifier then
  // all if clauses on the directive must include a directive-name-modifier.
  if (FoundNameModifiers[OMPD_unknown] && NamedModifiersNumber > 03.89k) {
    if (NamedModifiersNumber == AllowedNameModifiers.size()) {
      S.Diag(FoundNameModifiers[OMPD_unknown]->getBeginLoc(),
             diag::err_omp_no_more_if_clause);
    } else {
      std::string Values;
      std::string Sep(", ");
      unsigned AllowedCnt = 0;
      unsigned TotalAllowedNum =
          AllowedNameModifiers.size() - NamedModifiersNumber;
      for (unsigned Cnt = 0, End = AllowedNameModifiers.size(); Cnt < End;
           ++Cnt) {
        OpenMPDirectiveKind NM = AllowedNameModifiers[Cnt];
        if (!FoundNameModifiers[NM]) {
          Values += "'";
          Values += getOpenMPDirectiveName(NM);
          Values += "'";
          if (AllowedCnt + 2 == TotalAllowedNum)
            Values += " or ";
          else if (AllowedCnt + 1 != TotalAllowedNum)
            Values += Sep;
          ++AllowedCnt;
        }
      }
      S.Diag(FoundNameModifiers[OMPD_unknown]->getCondition()->getBeginLoc(),
             diag::err_omp_unnamed_if_clause)
          << (TotalAllowedNum > 1) << Values;
    }
    for (SourceLocation Loc : NameModifierLoc) {
      S.Diag(Loc, diag::note_omp_previous_named_if_clause);
    }
    ErrorFound = true;
  }
  return ErrorFound;
}

static std::pair<ValueDecl *, bool> getPrivateItem(Sema &S, Expr *&RefExpr,
                                                   SourceLocation &ELoc,
                                                   SourceRange &ERange,
                                                   bool AllowArraySection) {
  if (RefExpr->isTypeDependent() || RefExpr->isValueDependent()202k ||
      RefExpr->containsUnexpandedParameterPack()202k)
    return std::make_pair(nullptr, true);

  // OpenMP [3.1, C/C++]
  //  A list item is a variable name.
  // OpenMP  [2.9.3.3, Restrictions, p.1]
  //  A variable that is part of another variable (as an array or
  //  structure element) cannot appear in a private clause.
  RefExpr = RefExpr->IgnoreParens();
  enum {
    NoArrayExpr = -1,
    ArraySubscript = 0,
    OMPArraySection = 1
  } IsArrayExpr = NoArrayExpr;
  if (AllowArraySection) {
    if (auto *ASE = dyn_cast_or_null<ArraySubscriptExpr>(RefExpr)) {
      Expr *Base = ASE->getBase()->IgnoreParenImpCasts();
      while (auto *TempASE = dyn_cast<ArraySubscriptExpr>(Base))
        Base = TempASE->getBase()->IgnoreParenImpCasts();
      RefExpr = Base;
      IsArrayExpr = ArraySubscript;
    } else if (auto *OASE = dyn_cast_or_null<OMPArraySectionExpr>(RefExpr)) {
      Expr *Base = OASE->getBase()->IgnoreParenImpCasts();
      while (auto *TempOASE = dyn_cast<OMPArraySectionExpr>(Base))
        Base = TempOASE->getBase()->IgnoreParenImpCasts();
      while (auto *TempASE = dyn_cast<ArraySubscriptExpr>(Base))
        Base = TempASE->getBase()->IgnoreParenImpCasts();
      RefExpr = Base;
      IsArrayExpr = OMPArraySection;
    }
  }
  ELoc = RefExpr->getExprLoc();
  ERange = RefExpr->getSourceRange();
  RefExpr = RefExpr->IgnoreParenImpCasts();
  auto *DE = dyn_cast_or_null<DeclRefExpr>(RefExpr);
  auto *ME = dyn_cast_or_null<MemberExpr>(RefExpr);
  if ((!DE || !isa<VarDecl>(DE->getDecl())196k) &&
      (6.30kS.getCurrentThisType().isNull()6.30k || !ME3.33k ||
       !isa<CXXThisExpr>(ME->getBase()->IgnoreParenImpCasts())3.33k ||
       !isa<FieldDecl>(ME->getMemberDecl())3.15k)) {
    if (IsArrayExpr != NoArrayExpr) {
      S.Diag(ELoc, diag::err_omp_expected_base_var_name) << IsArrayExpr
                                                         << ERange;
    } else {
      S.Diag(ELoc,
             AllowArraySection
                 ? diag::err_omp_expected_var_name_member_expr_or_array_item1.17k
                 : diag::err_omp_expected_var_name_member_expr1.96k)
          << (S.getCurrentThisType().isNull() ? 02.95k : 1184) << ERange;
    }
    return std::make_pair(nullptr, false);
  }
  return std::make_pair(
      getCanonicalDecl(DE ? DE->getDecl()196k : ME->getMemberDecl()3.15k), false);
}

static void checkAllocateClauses(Sema &S, DSAStackTy *Stack,
                                 ArrayRef<OMPClause *> Clauses) {
  assert(!S.CurContext->isDependentContext() &&
         "Expected non-dependent context.");
  auto AllocateRange =
      llvm::make_filter_range(Clauses, OMPAllocateClause::classof);
  llvm::DenseMap<CanonicalDeclPtr<Decl>, CanonicalDeclPtr<VarDecl>>
      DeclToCopy;
  auto PrivateRange = llvm::make_filter_range(Clauses, [](const OMPClause *C) {
    return isOpenMPPrivate(C->getClauseKind());
  });
  for (OMPClause *Cl : PrivateRange) {
    MutableArrayRef<Expr *>::iterator I, It, Et;
    if (Cl->getClauseKind() == OMPC_private) {
      auto *PC = cast<OMPPrivateClause>(Cl);
      I = PC->private_copies().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else if (Cl->getClauseKind() == OMPC_firstprivate) {
      auto *PC = cast<OMPFirstprivateClause>(Cl);
      I = PC->private_copies().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else if (15.7kCl->getClauseKind() == OMPC_lastprivate15.7k) {
      auto *PC = cast<OMPLastprivateClause>(Cl);
      I = PC->private_copies().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else if (Cl->getClauseKind() == OMPC_linear) {
      auto *PC = cast<OMPLinearClause>(Cl);
      I = PC->privates().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else if (Cl->getClauseKind() == OMPC_reduction) {
      auto *PC = cast<OMPReductionClause>(Cl);
      I = PC->privates().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else if (2.24kCl->getClauseKind() == OMPC_task_reduction2.24k) {
      auto *PC = cast<OMPTaskReductionClause>(Cl);
      I = PC->privates().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else if (792Cl->getClauseKind() == OMPC_in_reduction792) {
      auto *PC = cast<OMPInReductionClause>(Cl);
      I = PC->privates().begin();
      It = PC->varlist_begin();
      Et = PC->varlist_end();
    } else {
      llvm_unreachable("Expected private clause.");
    }
    for (Expr *E : llvm::make_range(It, Et))59.6k {
      if (!*I) {
        ++I;
        continue;
      }
      SourceLocation ELoc;
      SourceRange ERange;
      Expr *SimpleRefExpr = E;
      auto Res = getPrivateItem(S, SimpleRefExpr, ELoc, ERange,
                                /*AllowArraySection=*/true);
      DeclToCopy.try_emplace(Res.first,
                             cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()));
      ++I;
    }
  }
  for (OMPClause *C : AllocateRange) {
    auto *AC = cast<OMPAllocateClause>(C);
    OMPAllocateDeclAttr::AllocatorTypeTy AllocatorKind =
        getAllocatorKind(S, Stack, AC->getAllocator());
    // OpenMP, 2.11.4 allocate Clause, Restrictions.
    // For task, taskloop or target directives, allocation requests to memory
    // allocators with the trait access set to thread result in unspecified
    // behavior.
    if (AllocatorKind == OMPAllocateDeclAttr::OMPThreadMemAlloc &&
        (374isOpenMPTaskingDirective(Stack->getCurrentDirective())374 ||
         isOpenMPTargetExecutionDirective(Stack->getCurrentDirective())190)) {
      S.Diag(AC->getAllocator()->getExprLoc(),
             diag::warn_omp_allocate_thread_on_task_target_directive)
          << getOpenMPDirectiveName(Stack->getCurrentDirective());
    }
    for (Expr *E : AC->varlists()) {
      SourceLocation ELoc;
      SourceRange ERange;
      Expr *SimpleRefExpr = E;
      auto Res = getPrivateItem(S, SimpleRefExpr, ELoc, ERange);
      ValueDecl *VD = Res.first;
      DSAStackTy::DSAVarData Data = Stack->getTopDSA(VD, /*FromParent=*/false);
      if (!isOpenMPPrivate(Data.CKind)) {
        S.Diag(E->getExprLoc(),
               diag::err_omp_expected_private_copy_for_allocate);
        continue;
      }
      VarDecl *PrivateVD = DeclToCopy[VD];
      if (checkPreviousOMPAllocateAttribute(S, Stack, E, PrivateVD,
                                            AllocatorKind, AC->getAllocator()))
        continue;
      applyOMPAllocateAttribute(S, PrivateVD, AllocatorKind, AC->getAllocator(),
                                E->getSourceRange());
    }
  }
}

StmtResult Sema::ActOnOpenMPExecutableDirective(
    OpenMPDirectiveKind Kind, const DeclarationNameInfo &DirName,
    OpenMPDirectiveKind CancelRegion, ArrayRef<OMPClause *> Clauses,
    Stmt *AStmt, SourceLocation StartLoc, SourceLocation EndLoc) {
  StmtResult Res = StmtError();
  // First check CancelRegion which is then used in checkNestingOfRegions.
  if (checkCancelRegion(*this, Kind, CancelRegion, StartLoc) ||
      checkNestingOfRegions(*this, 244kDSAStack244k, Kind, DirName, CancelRegion,
                            StartLoc))
    return StmtError();

  llvm::SmallVector<OMPClause *, 8> ClausesWithImplicit;
  VarsWithInheritedDSAType VarsWithInheritedDSA;
  bool ErrorFound = false;
  ClausesWithImplicit.append(Clauses.begin(), Clauses.end());
  if (AStmt && !CurContext->isDependentContext()225k) {
    assert(isa<CapturedStmt>(AStmt) && "Captured statement expected");

    // Check default data sharing attributes for referenced variables.
    DSAAttrChecker DSAChecker(DSAStack, *this, cast<CapturedStmt>(AStmt));
    int ThisCaptureLevel = getOpenMPCaptureLevels(Kind);
    Stmt *S = AStmt;
    while (--ThisCaptureLevel >= 0)
      S = cast<CapturedStmt>(S)->getCapturedStmt();
    DSAChecker.Visit(S);
    if (!isOpenMPTargetDataManagementDirective(Kind) &&
        !isOpenMPTaskingDirective(Kind)162k) {
      // Visit subcaptures to generate implicit clauses for captured vars.
      auto *CS = cast<CapturedStmt>(AStmt);
      SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
      getOpenMPCaptureRegions(CaptureRegions, Kind);
      // Ignore outer tasking regions for target directives.
      if (CaptureRegions.size() > 1 && CaptureRegions.front() == OMPD_task70.8k)
        CS = cast<CapturedStmt>(CS->getCapturedStmt());
      DSAChecker.visitSubCaptures(CS);
    }
    if (DSAChecker.isErrorFound())
      return StmtError();
    // Generate list of implicitly defined firstprivate variables.
    VarsWithInheritedDSA = DSAChecker.getVarsWithInheritedDSA();

    SmallVector<Expr *, 4> ImplicitFirstprivates(
        DSAChecker.getImplicitFirstprivate().begin(),
        DSAChecker.getImplicitFirstprivate().end());
    SmallVector<Expr *, 4> ImplicitMaps[OMPC_MAP_delete];
    for (unsigned I = 0; I < OMPC_MAP_delete; ++I664k) {
      ArrayRef<Expr *> ImplicitMap =
          DSAChecker.getImplicitMap(static_cast<OpenMPDefaultmapClauseKind>(I));
      ImplicitMaps[I].append(ImplicitMap.begin(), ImplicitMap.end());
    }
    // Mark taskgroup task_reduction descriptors as implicitly firstprivate.
    for (OMPClause *C : Clauses) {
      if (auto *IRC = dyn_cast<OMPInReductionClause>(C)) {
        for (Expr *E : IRC->taskgroup_descriptors())
          if (E)
            ImplicitFirstprivates.emplace_back(E);
      }
    }
    if (!ImplicitFirstprivates.empty()) {
      if (OMPClause *Implicit = ActOnOpenMPFirstprivateClause(
              ImplicitFirstprivates, SourceLocation(), SourceLocation(),
              SourceLocation())) {
        ClausesWithImplicit.push_back(Implicit);
        ErrorFound = cast<OMPFirstprivateClause>(Implicit)->varlist_size() !=
                     ImplicitFirstprivates.size();
      } else {
        ErrorFound = true;
      }
    }
    int ClauseKindCnt = -1;
    for (ArrayRef<Expr *> ImplicitMap : ImplicitMaps) {
      ++ClauseKindCnt;
      if (ImplicitMap.empty())
        continue;
      CXXScopeSpec MapperIdScopeSpec;
      DeclarationNameInfo MapperId;
      auto Kind = static_cast<OpenMPMapClauseKind>(ClauseKindCnt);
      if (OMPClause *Implicit = ActOnOpenMPMapClause(
              llvm::None, llvm::None, MapperIdScopeSpec, MapperId, Kind,
              /*IsMapTypeImplicit=*/true, SourceLocation(), SourceLocation(),
              ImplicitMap, OMPVarListLocTy())) {
        ClausesWithImplicit.emplace_back(Implicit);
        ErrorFound |=
            cast<OMPMapClause>(Implicit)->varlist_size() != ImplicitMap.size();
      } else {
        ErrorFound = true;
      }
    }
  }

  llvm::SmallVector<OpenMPDirectiveKind, 4> AllowedNameModifiers;
  switch (Kind) {
  case OMPD_parallel:
    Res = ActOnOpenMPParallelDirective(ClausesWithImplicit, AStmt, StartLoc,
                                       EndLoc);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_simd:
    Res = ActOnOpenMPSimdDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc,
                                   VarsWithInheritedDSA);
    if (LangOpts.OpenMP >= 50)
      AllowedNameModifiers.push_back(OMPD_simd);
    break;
  case OMPD_for:
    Res = ActOnOpenMPForDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc,
                                  VarsWithInheritedDSA);
    break;
  case OMPD_for_simd:
    Res = ActOnOpenMPForSimdDirective(ClausesWithImplicit, AStmt, StartLoc,
                                      EndLoc, VarsWithInheritedDSA);
    if (LangOpts.OpenMP >= 50)
      AllowedNameModifiers.push_back(OMPD_simd);
    break;
  case OMPD_sections:
    Res = ActOnOpenMPSectionsDirective(ClausesWithImplicit, AStmt, StartLoc,
                                       EndLoc);
    break;
  case OMPD_section:
    assert(ClausesWithImplicit.empty() &&
           "No clauses are allowed for 'omp section' directive");
    Res = ActOnOpenMPSectionDirective(AStmt, StartLoc, EndLoc);
    break;
  case OMPD_single:
    Res = ActOnOpenMPSingleDirective(ClausesWithImplicit, AStmt, StartLoc,
                                     EndLoc);
    break;
  case OMPD_master:
    assert(ClausesWithImplicit.empty() &&
           "No clauses are allowed for 'omp master' directive");
    Res = ActOnOpenMPMasterDirective(AStmt, StartLoc, EndLoc);
    break;
  case OMPD_critical:
    Res = ActOnOpenMPCriticalDirective(DirName, ClausesWithImplicit, AStmt,
                                       StartLoc, EndLoc);
    break;
  case OMPD_parallel_for:
    Res = ActOnOpenMPParallelForDirective(ClausesWithImplicit, AStmt, StartLoc,
                                          EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_parallel_for_simd:
    Res = ActOnOpenMPParallelForSimdDirective(
        ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_parallel);
    if (LangOpts.OpenMP >= 50)
      AllowedNameModifiers.push_back(OMPD_simd);
    break;
  case OMPD_parallel_master:
    Res = ActOnOpenMPParallelMasterDirective(ClausesWithImplicit, AStmt,
                                               StartLoc, EndLoc);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_parallel_sections:
    Res = ActOnOpenMPParallelSectionsDirective(ClausesWithImplicit, AStmt,
                                               StartLoc, EndLoc);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_task:
    Res =
        ActOnOpenMPTaskDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc);
    AllowedNameModifiers.push_back(OMPD_task);
    break;
  case OMPD_taskyield:
    assert(ClausesWithImplicit.empty() &&
           "No clauses are allowed for 'omp taskyield' directive");
    assert(AStmt == nullptr &&
           "No associated statement allowed for 'omp taskyield' directive");
    Res = ActOnOpenMPTaskyieldDirective(StartLoc, EndLoc);
    break;
  case OMPD_barrier:
    assert(ClausesWithImplicit.empty() &&
           "No clauses are allowed for 'omp barrier' directive");
    assert(AStmt == nullptr &&
           "No associated statement allowed for 'omp barrier' directive");
    Res = ActOnOpenMPBarrierDirective(StartLoc, EndLoc);
    break;
  case OMPD_taskwait:
    assert(ClausesWithImplicit.empty() &&
           "No clauses are allowed for 'omp taskwait' directive");
    assert(AStmt == nullptr &&
           "No associated statement allowed for 'omp taskwait' directive");
    Res = ActOnOpenMPTaskwaitDirective(StartLoc, EndLoc);
    break;
  case OMPD_taskgroup:
    Res = ActOnOpenMPTaskgroupDirective(ClausesWithImplicit, AStmt, StartLoc,
                                        EndLoc);
    break;
  case OMPD_flush:
    assert(AStmt == nullptr &&
           "No associated statement allowed for 'omp flush' directive");
    Res = ActOnOpenMPFlushDirective(ClausesWithImplicit, StartLoc, EndLoc);
    break;
  case OMPD_ordered:
    Res = ActOnOpenMPOrderedDirective(ClausesWithImplicit, AStmt, StartLoc,
                                      EndLoc);
    break;
  case OMPD_atomic:
    Res = ActOnOpenMPAtomicDirective(ClausesWithImplicit, AStmt, StartLoc,
                                     EndLoc);
    break;
  case OMPD_teams:
    Res =
        ActOnOpenMPTeamsDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc);
    break;
  case OMPD_target:
    Res = ActOnOpenMPTargetDirective(ClausesWithImplicit, AStmt, StartLoc,
                                     EndLoc);
    AllowedNameModifiers.push_back(OMPD_target);
    break;
  case OMPD_target_parallel:
    Res = ActOnOpenMPTargetParallelDirective(ClausesWithImplicit, AStmt,
                                             StartLoc, EndLoc);
    AllowedNameModifiers.push_back(OMPD_target);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_target_parallel_for:
    Res = ActOnOpenMPTargetParallelForDirective(
        ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_target);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_cancellation_point:
    assert(ClausesWithImplicit.empty() &&
           "No clauses are allowed for 'omp cancellation point' directive");
    assert(AStmt == nullptr && "No associated statement allowed for 'omp "
                               "cancellation point' directive");
    Res = ActOnOpenMPCancellationPointDirective(StartLoc, EndLoc, CancelRegion);
    break;
  case OMPD_cancel:
    assert(AStmt == nullptr &&
           "No associated statement allowed for 'omp cancel' directive");
    Res = ActOnOpenMPCancelDirective(ClausesWithImplicit, StartLoc, EndLoc,
                                     CancelRegion);
    AllowedNameModifiers.push_back(OMPD_cancel);
    break;
  case OMPD_target_data:
    Res = ActOnOpenMPTargetDataDirective(ClausesWithImplicit, AStmt, StartLoc,
                                         EndLoc);
    AllowedNameModifiers.push_back(OMPD_target_data);
    break;
  case OMPD_target_enter_data:
    Res = ActOnOpenMPTargetEnterDataDirective(ClausesWithImplicit, StartLoc,
                                              EndLoc, AStmt);
    AllowedNameModifiers.push_back(OMPD_target_enter_data);
    break;
  case OMPD_target_exit_data:
    Res = ActOnOpenMPTargetExitDataDirective(ClausesWithImplicit, StartLoc,
                                             EndLoc, AStmt);
    AllowedNameModifiers.push_back(OMPD_target_exit_data);
    break;
  case OMPD_taskloop:
    Res = ActOnOpenMPTaskLoopDirective(ClausesWithImplicit, AStmt, StartLoc,
                                       EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_taskloop);
    break;
  case OMPD_taskloop_simd:
    Res = ActOnOpenMPTaskLoopSimdDirective(ClausesWithImplicit, AStmt, StartLoc,
                                           EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_taskloop);
    if (LangOpts.OpenMP >= 50)
      AllowedNameModifiers.push_back(OMPD_simd);
    break;
  case OMPD_master_taskloop:
    Res = ActOnOpenMPMasterTaskLoopDirective(
        ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_taskloop);
    break;
  case OMPD_master_taskloop_simd:
    Res = ActOnOpenMPMasterTaskLoopSimdDirective(
        ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_taskloop);
    if (LangOpts.OpenMP >= 50)
      AllowedNameModifiers.push_back(OMPD_simd);
    break;
  case OMPD_parallel_master_taskloop:
    Res = ActOnOpenMPParallelMasterTaskLoopDirective(
        ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_taskloop);
    AllowedNameModifiers.push_back(OMPD_parallel);
    break;
  case OMPD_parallel_master_taskloop_simd:
    Res = ActOnOpenMPParallelMasterTaskLoopSimdDirective(
        ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
    AllowedNameModifiers.push_back(OMPD_taskloop);
4841

Coverage Report

Created: 2020-02-15 09:57