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      1 //===- OpenMPClause.h - Classes for OpenMP clauses --------------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 /// \file
     10 /// \brief This file defines OpenMP AST classes for clauses.
     11 /// There are clauses for executable directives, clauses for declarative
     12 /// directives and clauses which can be used in both kinds of directives.
     13 ///
     14 //===----------------------------------------------------------------------===//
     15 
     16 #ifndef LLVM_CLANG_AST_OPENMPCLAUSE_H
     17 #define LLVM_CLANG_AST_OPENMPCLAUSE_H
     18 
     19 #include "clang/AST/Expr.h"
     20 #include "clang/AST/Stmt.h"
     21 #include "clang/Basic/OpenMPKinds.h"
     22 #include "clang/Basic/SourceLocation.h"
     23 
     24 namespace clang {
     25 
     26 //===----------------------------------------------------------------------===//
     27 // AST classes for clauses.
     28 //===----------------------------------------------------------------------===//
     29 
     30 /// \brief This is a basic class for representing single OpenMP clause.
     31 ///
     32 class OMPClause {
     33   /// \brief Starting location of the clause (the clause keyword).
     34   SourceLocation StartLoc;
     35   /// \brief Ending location of the clause.
     36   SourceLocation EndLoc;
     37   /// \brief Kind of the clause.
     38   OpenMPClauseKind Kind;
     39 
     40 protected:
     41   OMPClause(OpenMPClauseKind K, SourceLocation StartLoc, SourceLocation EndLoc)
     42       : StartLoc(StartLoc), EndLoc(EndLoc), Kind(K) {}
     43 
     44 public:
     45   /// \brief Returns the starting location of the clause.
     46   SourceLocation getLocStart() const { return StartLoc; }
     47   /// \brief Returns the ending location of the clause.
     48   SourceLocation getLocEnd() const { return EndLoc; }
     49 
     50   /// \brief Sets the starting location of the clause.
     51   void setLocStart(SourceLocation Loc) { StartLoc = Loc; }
     52   /// \brief Sets the ending location of the clause.
     53   void setLocEnd(SourceLocation Loc) { EndLoc = Loc; }
     54 
     55   /// \brief Returns kind of OpenMP clause (private, shared, reduction, etc.).
     56   OpenMPClauseKind getClauseKind() const { return Kind; }
     57 
     58   bool isImplicit() const { return StartLoc.isInvalid(); }
     59 
     60   StmtRange children();
     61   ConstStmtRange children() const {
     62     return const_cast<OMPClause *>(this)->children();
     63   }
     64   static bool classof(const OMPClause *T) { return true; }
     65 };
     66 
     67 /// \brief This represents clauses with the list of variables like 'private',
     68 /// 'firstprivate', 'copyin', 'shared', or 'reduction' clauses in the
     69 /// '#pragma omp ...' directives.
     70 template <class T> class OMPVarListClause : public OMPClause {
     71   friend class OMPClauseReader;
     72   /// \brief Location of '('.
     73   SourceLocation LParenLoc;
     74   /// \brief Number of variables in the list.
     75   unsigned NumVars;
     76 
     77 protected:
     78   /// \brief Fetches list of variables associated with this clause.
     79   MutableArrayRef<Expr *> getVarRefs() {
     80     return MutableArrayRef<Expr *>(
     81         reinterpret_cast<Expr **>(
     82             reinterpret_cast<char *>(this) +
     83             llvm::RoundUpToAlignment(sizeof(T), llvm::alignOf<Expr *>())),
     84         NumVars);
     85   }
     86 
     87   /// \brief Sets the list of variables for this clause.
     88   void setVarRefs(ArrayRef<Expr *> VL) {
     89     assert(VL.size() == NumVars &&
     90            "Number of variables is not the same as the preallocated buffer");
     91     std::copy(
     92         VL.begin(), VL.end(),
     93         reinterpret_cast<Expr **>(
     94             reinterpret_cast<char *>(this) +
     95             llvm::RoundUpToAlignment(sizeof(T), llvm::alignOf<Expr *>())));
     96   }
     97 
     98   /// \brief Build a clause with \a N variables
     99   ///
    100   /// \param K Kind of the clause.
    101   /// \param StartLoc Starting location of the clause (the clause keyword).
    102   /// \param LParenLoc Location of '('.
    103   /// \param EndLoc Ending location of the clause.
    104   /// \param N Number of the variables in the clause.
    105   ///
    106   OMPVarListClause(OpenMPClauseKind K, SourceLocation StartLoc,
    107                    SourceLocation LParenLoc, SourceLocation EndLoc, unsigned N)
    108       : OMPClause(K, StartLoc, EndLoc), LParenLoc(LParenLoc), NumVars(N) {}
    109 
    110 public:
    111   typedef MutableArrayRef<Expr *>::iterator varlist_iterator;
    112   typedef ArrayRef<const Expr *>::iterator varlist_const_iterator;
    113   typedef llvm::iterator_range<varlist_iterator> varlist_range;
    114   typedef llvm::iterator_range<varlist_const_iterator> varlist_const_range;
    115 
    116   unsigned varlist_size() const { return NumVars; }
    117   bool varlist_empty() const { return NumVars == 0; }
    118 
    119   varlist_range varlists() {
    120     return varlist_range(varlist_begin(), varlist_end());
    121   }
    122   varlist_const_range varlists() const {
    123     return varlist_const_range(varlist_begin(), varlist_end());
    124   }
    125 
    126   varlist_iterator varlist_begin() { return getVarRefs().begin(); }
    127   varlist_iterator varlist_end() { return getVarRefs().end(); }
    128   varlist_const_iterator varlist_begin() const { return getVarRefs().begin(); }
    129   varlist_const_iterator varlist_end() const { return getVarRefs().end(); }
    130 
    131   /// \brief Sets the location of '('.
    132   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    133   /// \brief Returns the location of '('.
    134   SourceLocation getLParenLoc() const { return LParenLoc; }
    135 
    136   /// \brief Fetches list of all variables in the clause.
    137   ArrayRef<const Expr *> getVarRefs() const {
    138     return ArrayRef<const Expr *>(
    139         reinterpret_cast<const Expr *const *>(
    140             reinterpret_cast<const char *>(this) +
    141             llvm::RoundUpToAlignment(sizeof(T), llvm::alignOf<Expr *>())),
    142         NumVars);
    143   }
    144 };
    145 
    146 /// \brief This represents 'if' clause in the '#pragma omp ...' directive.
    147 ///
    148 /// \code
    149 /// #pragma omp parallel if(a > 5)
    150 /// \endcode
    151 /// In this example directive '#pragma omp parallel' has simple 'if'
    152 /// clause with condition 'a > 5'.
    153 ///
    154 class OMPIfClause : public OMPClause {
    155   friend class OMPClauseReader;
    156   /// \brief Location of '('.
    157   SourceLocation LParenLoc;
    158   /// \brief Condition of the 'if' clause.
    159   Stmt *Condition;
    160 
    161   /// \brief Set condition.
    162   ///
    163   void setCondition(Expr *Cond) { Condition = Cond; }
    164 
    165 public:
    166   /// \brief Build 'if' clause with condition \a Cond.
    167   ///
    168   /// \param StartLoc Starting location of the clause.
    169   /// \param LParenLoc Location of '('.
    170   /// \param Cond Condition of the clause.
    171   /// \param EndLoc Ending location of the clause.
    172   ///
    173   OMPIfClause(Expr *Cond, SourceLocation StartLoc, SourceLocation LParenLoc,
    174               SourceLocation EndLoc)
    175       : OMPClause(OMPC_if, StartLoc, EndLoc), LParenLoc(LParenLoc),
    176         Condition(Cond) {}
    177 
    178   /// \brief Build an empty clause.
    179   ///
    180   OMPIfClause()
    181       : OMPClause(OMPC_if, SourceLocation(), SourceLocation()),
    182         LParenLoc(SourceLocation()), Condition(nullptr) {}
    183 
    184   /// \brief Sets the location of '('.
    185   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    186   /// \brief Returns the location of '('.
    187   SourceLocation getLParenLoc() const { return LParenLoc; }
    188 
    189   /// \brief Returns condition.
    190   Expr *getCondition() const { return cast_or_null<Expr>(Condition); }
    191 
    192   static bool classof(const OMPClause *T) {
    193     return T->getClauseKind() == OMPC_if;
    194   }
    195 
    196   StmtRange children() { return StmtRange(&Condition, &Condition + 1); }
    197 };
    198 
    199 /// \brief This represents 'num_threads' clause in the '#pragma omp ...'
    200 /// directive.
    201 ///
    202 /// \code
    203 /// #pragma omp parallel num_threads(6)
    204 /// \endcode
    205 /// In this example directive '#pragma omp parallel' has simple 'num_threads'
    206 /// clause with number of threads '6'.
    207 ///
    208 class OMPNumThreadsClause : public OMPClause {
    209   friend class OMPClauseReader;
    210   /// \brief Location of '('.
    211   SourceLocation LParenLoc;
    212   /// \brief Condition of the 'num_threads' clause.
    213   Stmt *NumThreads;
    214 
    215   /// \brief Set condition.
    216   ///
    217   void setNumThreads(Expr *NThreads) { NumThreads = NThreads; }
    218 
    219 public:
    220   /// \brief Build 'num_threads' clause with condition \a NumThreads.
    221   ///
    222   /// \param NumThreads Number of threads for the construct.
    223   /// \param StartLoc Starting location of the clause.
    224   /// \param LParenLoc Location of '('.
    225   /// \param EndLoc Ending location of the clause.
    226   ///
    227   OMPNumThreadsClause(Expr *NumThreads, SourceLocation StartLoc,
    228                       SourceLocation LParenLoc, SourceLocation EndLoc)
    229       : OMPClause(OMPC_num_threads, StartLoc, EndLoc), LParenLoc(LParenLoc),
    230         NumThreads(NumThreads) {}
    231 
    232   /// \brief Build an empty clause.
    233   ///
    234   OMPNumThreadsClause()
    235       : OMPClause(OMPC_num_threads, SourceLocation(), SourceLocation()),
    236         LParenLoc(SourceLocation()), NumThreads(nullptr) {}
    237 
    238   /// \brief Sets the location of '('.
    239   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    240   /// \brief Returns the location of '('.
    241   SourceLocation getLParenLoc() const { return LParenLoc; }
    242 
    243   /// \brief Returns number of threads.
    244   Expr *getNumThreads() const { return cast_or_null<Expr>(NumThreads); }
    245 
    246   static bool classof(const OMPClause *T) {
    247     return T->getClauseKind() == OMPC_num_threads;
    248   }
    249 
    250   StmtRange children() { return StmtRange(&NumThreads, &NumThreads + 1); }
    251 };
    252 
    253 /// \brief This represents 'safelen' clause in the '#pragma omp ...'
    254 /// directive.
    255 ///
    256 /// \code
    257 /// #pragma omp simd safelen(4)
    258 /// \endcode
    259 /// In this example directive '#pragma omp simd' has clause 'safelen'
    260 /// with single expression '4'.
    261 /// If the safelen clause is used then no two iterations executed
    262 /// concurrently with SIMD instructions can have a greater distance
    263 /// in the logical iteration space than its value. The parameter of
    264 /// the safelen clause must be a constant positive integer expression.
    265 ///
    266 class OMPSafelenClause : public OMPClause {
    267   friend class OMPClauseReader;
    268   /// \brief Location of '('.
    269   SourceLocation LParenLoc;
    270   /// \brief Safe iteration space distance.
    271   Stmt *Safelen;
    272 
    273   /// \brief Set safelen.
    274   void setSafelen(Expr *Len) { Safelen = Len; }
    275 
    276 public:
    277   /// \brief Build 'safelen' clause.
    278   ///
    279   /// \param Len Expression associated with this clause.
    280   /// \param StartLoc Starting location of the clause.
    281   /// \param EndLoc Ending location of the clause.
    282   ///
    283   OMPSafelenClause(Expr *Len, SourceLocation StartLoc, SourceLocation LParenLoc,
    284                    SourceLocation EndLoc)
    285       : OMPClause(OMPC_safelen, StartLoc, EndLoc), LParenLoc(LParenLoc),
    286         Safelen(Len) {}
    287 
    288   /// \brief Build an empty clause.
    289   ///
    290   explicit OMPSafelenClause()
    291       : OMPClause(OMPC_safelen, SourceLocation(), SourceLocation()),
    292         LParenLoc(SourceLocation()), Safelen(nullptr) {}
    293 
    294   /// \brief Sets the location of '('.
    295   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    296   /// \brief Returns the location of '('.
    297   SourceLocation getLParenLoc() const { return LParenLoc; }
    298 
    299   /// \brief Return safe iteration space distance.
    300   Expr *getSafelen() const { return cast_or_null<Expr>(Safelen); }
    301 
    302   static bool classof(const OMPClause *T) {
    303     return T->getClauseKind() == OMPC_safelen;
    304   }
    305 
    306   StmtRange children() { return StmtRange(&Safelen, &Safelen + 1); }
    307 };
    308 
    309 /// \brief This represents 'collapse' clause in the '#pragma omp ...'
    310 /// directive.
    311 ///
    312 /// \code
    313 /// #pragma omp simd collapse(3)
    314 /// \endcode
    315 /// In this example directive '#pragma omp simd' has clause 'collapse'
    316 /// with single expression '3'.
    317 /// The parameter must be a constant positive integer expression, it specifies
    318 /// the number of nested loops that should be collapsed into a single iteration
    319 /// space.
    320 ///
    321 class OMPCollapseClause : public OMPClause {
    322   friend class OMPClauseReader;
    323   /// \brief Location of '('.
    324   SourceLocation LParenLoc;
    325   /// \brief Number of for-loops.
    326   Stmt *NumForLoops;
    327 
    328   /// \brief Set the number of associated for-loops.
    329   void setNumForLoops(Expr *Num) { NumForLoops = Num; }
    330 
    331 public:
    332   /// \brief Build 'collapse' clause.
    333   ///
    334   /// \param Num Expression associated with this clause.
    335   /// \param StartLoc Starting location of the clause.
    336   /// \param LParenLoc Location of '('.
    337   /// \param EndLoc Ending location of the clause.
    338   ///
    339   OMPCollapseClause(Expr *Num, SourceLocation StartLoc,
    340                     SourceLocation LParenLoc, SourceLocation EndLoc)
    341       : OMPClause(OMPC_collapse, StartLoc, EndLoc), LParenLoc(LParenLoc),
    342         NumForLoops(Num) {}
    343 
    344   /// \brief Build an empty clause.
    345   ///
    346   explicit OMPCollapseClause()
    347       : OMPClause(OMPC_collapse, SourceLocation(), SourceLocation()),
    348         LParenLoc(SourceLocation()), NumForLoops(nullptr) {}
    349 
    350   /// \brief Sets the location of '('.
    351   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    352   /// \brief Returns the location of '('.
    353   SourceLocation getLParenLoc() const { return LParenLoc; }
    354 
    355   /// \brief Return the number of associated for-loops.
    356   Expr *getNumForLoops() const { return cast_or_null<Expr>(NumForLoops); }
    357 
    358   static bool classof(const OMPClause *T) {
    359     return T->getClauseKind() == OMPC_collapse;
    360   }
    361 
    362   StmtRange children() { return StmtRange(&NumForLoops, &NumForLoops + 1); }
    363 };
    364 
    365 /// \brief This represents 'default' clause in the '#pragma omp ...' directive.
    366 ///
    367 /// \code
    368 /// #pragma omp parallel default(shared)
    369 /// \endcode
    370 /// In this example directive '#pragma omp parallel' has simple 'default'
    371 /// clause with kind 'shared'.
    372 ///
    373 class OMPDefaultClause : public OMPClause {
    374   friend class OMPClauseReader;
    375   /// \brief Location of '('.
    376   SourceLocation LParenLoc;
    377   /// \brief A kind of the 'default' clause.
    378   OpenMPDefaultClauseKind Kind;
    379   /// \brief Start location of the kind in source code.
    380   SourceLocation KindKwLoc;
    381 
    382   /// \brief Set kind of the clauses.
    383   ///
    384   /// \param K Argument of clause.
    385   ///
    386   void setDefaultKind(OpenMPDefaultClauseKind K) { Kind = K; }
    387 
    388   /// \brief Set argument location.
    389   ///
    390   /// \param KLoc Argument location.
    391   ///
    392   void setDefaultKindKwLoc(SourceLocation KLoc) { KindKwLoc = KLoc; }
    393 
    394 public:
    395   /// \brief Build 'default' clause with argument \a A ('none' or 'shared').
    396   ///
    397   /// \param A Argument of the clause ('none' or 'shared').
    398   /// \param ALoc Starting location of the argument.
    399   /// \param StartLoc Starting location of the clause.
    400   /// \param LParenLoc Location of '('.
    401   /// \param EndLoc Ending location of the clause.
    402   ///
    403   OMPDefaultClause(OpenMPDefaultClauseKind A, SourceLocation ALoc,
    404                    SourceLocation StartLoc, SourceLocation LParenLoc,
    405                    SourceLocation EndLoc)
    406       : OMPClause(OMPC_default, StartLoc, EndLoc), LParenLoc(LParenLoc),
    407         Kind(A), KindKwLoc(ALoc) {}
    408 
    409   /// \brief Build an empty clause.
    410   ///
    411   OMPDefaultClause()
    412       : OMPClause(OMPC_default, SourceLocation(), SourceLocation()),
    413         LParenLoc(SourceLocation()), Kind(OMPC_DEFAULT_unknown),
    414         KindKwLoc(SourceLocation()) {}
    415 
    416   /// \brief Sets the location of '('.
    417   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    418   /// \brief Returns the location of '('.
    419   SourceLocation getLParenLoc() const { return LParenLoc; }
    420 
    421   /// \brief Returns kind of the clause.
    422   OpenMPDefaultClauseKind getDefaultKind() const { return Kind; }
    423 
    424   /// \brief Returns location of clause kind.
    425   SourceLocation getDefaultKindKwLoc() const { return KindKwLoc; }
    426 
    427   static bool classof(const OMPClause *T) {
    428     return T->getClauseKind() == OMPC_default;
    429   }
    430 
    431   StmtRange children() { return StmtRange(); }
    432 };
    433 
    434 /// \brief This represents 'proc_bind' clause in the '#pragma omp ...'
    435 /// directive.
    436 ///
    437 /// \code
    438 /// #pragma omp parallel proc_bind(master)
    439 /// \endcode
    440 /// In this example directive '#pragma omp parallel' has simple 'proc_bind'
    441 /// clause with kind 'master'.
    442 ///
    443 class OMPProcBindClause : public OMPClause {
    444   friend class OMPClauseReader;
    445   /// \brief Location of '('.
    446   SourceLocation LParenLoc;
    447   /// \brief A kind of the 'proc_bind' clause.
    448   OpenMPProcBindClauseKind Kind;
    449   /// \brief Start location of the kind in source code.
    450   SourceLocation KindKwLoc;
    451 
    452   /// \brief Set kind of the clause.
    453   ///
    454   /// \param K Kind of clause.
    455   ///
    456   void setProcBindKind(OpenMPProcBindClauseKind K) { Kind = K; }
    457 
    458   /// \brief Set clause kind location.
    459   ///
    460   /// \param KLoc Kind location.
    461   ///
    462   void setProcBindKindKwLoc(SourceLocation KLoc) { KindKwLoc = KLoc; }
    463 
    464 public:
    465   /// \brief Build 'proc_bind' clause with argument \a A ('master', 'close' or
    466   ///        'spread').
    467   ///
    468   /// \param A Argument of the clause ('master', 'close' or 'spread').
    469   /// \param ALoc Starting location of the argument.
    470   /// \param StartLoc Starting location of the clause.
    471   /// \param LParenLoc Location of '('.
    472   /// \param EndLoc Ending location of the clause.
    473   ///
    474   OMPProcBindClause(OpenMPProcBindClauseKind A, SourceLocation ALoc,
    475                     SourceLocation StartLoc, SourceLocation LParenLoc,
    476                     SourceLocation EndLoc)
    477       : OMPClause(OMPC_proc_bind, StartLoc, EndLoc), LParenLoc(LParenLoc),
    478         Kind(A), KindKwLoc(ALoc) {}
    479 
    480   /// \brief Build an empty clause.
    481   ///
    482   OMPProcBindClause()
    483       : OMPClause(OMPC_proc_bind, SourceLocation(), SourceLocation()),
    484         LParenLoc(SourceLocation()), Kind(OMPC_PROC_BIND_unknown),
    485         KindKwLoc(SourceLocation()) {}
    486 
    487   /// \brief Sets the location of '('.
    488   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    489   /// \brief Returns the location of '('.
    490   SourceLocation getLParenLoc() const { return LParenLoc; }
    491 
    492   /// \brief Returns kind of the clause.
    493   OpenMPProcBindClauseKind getProcBindKind() const { return Kind; }
    494 
    495   /// \brief Returns location of clause kind.
    496   SourceLocation getProcBindKindKwLoc() const { return KindKwLoc; }
    497 
    498   static bool classof(const OMPClause *T) {
    499     return T->getClauseKind() == OMPC_proc_bind;
    500   }
    501 
    502   StmtRange children() { return StmtRange(); }
    503 };
    504 
    505 /// \brief This represents 'schedule' clause in the '#pragma omp ...' directive.
    506 ///
    507 /// \code
    508 /// #pragma omp for schedule(static, 3)
    509 /// \endcode
    510 /// In this example directive '#pragma omp for' has 'schedule' clause with
    511 /// arguments 'static' and '3'.
    512 ///
    513 class OMPScheduleClause : public OMPClause {
    514   friend class OMPClauseReader;
    515   /// \brief Location of '('.
    516   SourceLocation LParenLoc;
    517   /// \brief A kind of the 'schedule' clause.
    518   OpenMPScheduleClauseKind Kind;
    519   /// \brief Start location of the schedule ind in source code.
    520   SourceLocation KindLoc;
    521   /// \brief Location of ',' (if any).
    522   SourceLocation CommaLoc;
    523   /// \brief Chunk size.
    524   Stmt *ChunkSize;
    525 
    526   /// \brief Set schedule kind.
    527   ///
    528   /// \param K Schedule kind.
    529   ///
    530   void setScheduleKind(OpenMPScheduleClauseKind K) { Kind = K; }
    531   /// \brief Sets the location of '('.
    532   ///
    533   /// \param Loc Location of '('.
    534   ///
    535   void setLParenLoc(SourceLocation Loc) { LParenLoc = Loc; }
    536   /// \brief Set schedule kind start location.
    537   ///
    538   /// \param KLoc Schedule kind location.
    539   ///
    540   void setScheduleKindLoc(SourceLocation KLoc) { KindLoc = KLoc; }
    541   /// \brief Set location of ','.
    542   ///
    543   /// \param Loc Location of ','.
    544   ///
    545   void setCommaLoc(SourceLocation Loc) { CommaLoc = Loc; }
    546   /// \brief Set chunk size.
    547   ///
    548   /// \param E Chunk size.
    549   ///
    550   void setChunkSize(Expr *E) { ChunkSize = E; }
    551 
    552 public:
    553   /// \brief Build 'schedule' clause with schedule kind \a Kind and chunk size
    554   /// expression \a ChunkSize.
    555   ///
    556   /// \param StartLoc Starting location of the clause.
    557   /// \param LParenLoc Location of '('.
    558   /// \param KLoc Starting location of the argument.
    559   /// \param CommaLoc Location of ','.
    560   /// \param EndLoc Ending location of the clause.
    561   /// \param Kind Schedule kind.
    562   /// \param ChunkSize Chunk size.
    563   ///
    564   OMPScheduleClause(SourceLocation StartLoc, SourceLocation LParenLoc,
    565                     SourceLocation KLoc, SourceLocation CommaLoc,
    566                     SourceLocation EndLoc, OpenMPScheduleClauseKind Kind,
    567                     Expr *ChunkSize)
    568       : OMPClause(OMPC_schedule, StartLoc, EndLoc), LParenLoc(LParenLoc),
    569         Kind(Kind), KindLoc(KLoc), CommaLoc(CommaLoc), ChunkSize(ChunkSize) {}
    570 
    571   /// \brief Build an empty clause.
    572   ///
    573   explicit OMPScheduleClause()
    574       : OMPClause(OMPC_schedule, SourceLocation(), SourceLocation()),
    575         Kind(OMPC_SCHEDULE_unknown), ChunkSize(nullptr) {}
    576 
    577   /// \brief Get kind of the clause.
    578   ///
    579   OpenMPScheduleClauseKind getScheduleKind() const { return Kind; }
    580   /// \brief Get location of '('.
    581   ///
    582   SourceLocation getLParenLoc() { return LParenLoc; }
    583   /// \brief Get kind location.
    584   ///
    585   SourceLocation getScheduleKindLoc() { return KindLoc; }
    586   /// \brief Get location of ','.
    587   ///
    588   SourceLocation getCommaLoc() { return CommaLoc; }
    589   /// \brief Get chunk size.
    590   ///
    591   Expr *getChunkSize() { return dyn_cast_or_null<Expr>(ChunkSize); }
    592   /// \brief Get chunk size.
    593   ///
    594   Expr *getChunkSize() const { return dyn_cast_or_null<Expr>(ChunkSize); }
    595 
    596   static bool classof(const OMPClause *T) {
    597     return T->getClauseKind() == OMPC_schedule;
    598   }
    599 
    600   StmtRange children() { return StmtRange(&ChunkSize, &ChunkSize + 1); }
    601 };
    602 
    603 /// \brief This represents 'ordered' clause in the '#pragma omp ...' directive.
    604 ///
    605 /// \code
    606 /// #pragma omp for ordered
    607 /// \endcode
    608 /// In this example directive '#pragma omp for' has 'ordered' clause.
    609 ///
    610 class OMPOrderedClause : public OMPClause {
    611 public:
    612   /// \brief Build 'ordered' clause.
    613   ///
    614   /// \param StartLoc Starting location of the clause.
    615   /// \param EndLoc Ending location of the clause.
    616   ///
    617   OMPOrderedClause(SourceLocation StartLoc, SourceLocation EndLoc)
    618       : OMPClause(OMPC_ordered, StartLoc, EndLoc) {}
    619 
    620   /// \brief Build an empty clause.
    621   ///
    622   OMPOrderedClause()
    623       : OMPClause(OMPC_ordered, SourceLocation(), SourceLocation()) {}
    624 
    625   static bool classof(const OMPClause *T) {
    626     return T->getClauseKind() == OMPC_ordered;
    627   }
    628 
    629   StmtRange children() { return StmtRange(); }
    630 };
    631 
    632 /// \brief This represents 'nowait' clause in the '#pragma omp ...' directive.
    633 ///
    634 /// \code
    635 /// #pragma omp for nowait
    636 /// \endcode
    637 /// In this example directive '#pragma omp for' has 'nowait' clause.
    638 ///
    639 class OMPNowaitClause : public OMPClause {
    640 public:
    641   /// \brief Build 'nowait' clause.
    642   ///
    643   /// \param StartLoc Starting location of the clause.
    644   /// \param EndLoc Ending location of the clause.
    645   ///
    646   OMPNowaitClause(SourceLocation StartLoc, SourceLocation EndLoc)
    647       : OMPClause(OMPC_nowait, StartLoc, EndLoc) {}
    648 
    649   /// \brief Build an empty clause.
    650   ///
    651   OMPNowaitClause()
    652       : OMPClause(OMPC_nowait, SourceLocation(), SourceLocation()) {}
    653 
    654   static bool classof(const OMPClause *T) {
    655     return T->getClauseKind() == OMPC_nowait;
    656   }
    657 
    658   StmtRange children() { return StmtRange(); }
    659 };
    660 
    661 /// \brief This represents clause 'private' in the '#pragma omp ...' directives.
    662 ///
    663 /// \code
    664 /// #pragma omp parallel private(a,b)
    665 /// \endcode
    666 /// In this example directive '#pragma omp parallel' has clause 'private'
    667 /// with the variables 'a' and 'b'.
    668 ///
    669 class OMPPrivateClause : public OMPVarListClause<OMPPrivateClause> {
    670   /// \brief Build clause with number of variables \a N.
    671   ///
    672   /// \param StartLoc Starting location of the clause.
    673   /// \param LParenLoc Location of '('.
    674   /// \param EndLoc Ending location of the clause.
    675   /// \param N Number of the variables in the clause.
    676   ///
    677   OMPPrivateClause(SourceLocation StartLoc, SourceLocation LParenLoc,
    678                    SourceLocation EndLoc, unsigned N)
    679       : OMPVarListClause<OMPPrivateClause>(OMPC_private, StartLoc, LParenLoc,
    680                                            EndLoc, N) {}
    681 
    682   /// \brief Build an empty clause.
    683   ///
    684   /// \param N Number of variables.
    685   ///
    686   explicit OMPPrivateClause(unsigned N)
    687       : OMPVarListClause<OMPPrivateClause>(OMPC_private, SourceLocation(),
    688                                            SourceLocation(), SourceLocation(),
    689                                            N) {}
    690 
    691 public:
    692   /// \brief Creates clause with a list of variables \a VL.
    693   ///
    694   /// \param C AST context.
    695   /// \param StartLoc Starting location of the clause.
    696   /// \param LParenLoc Location of '('.
    697   /// \param EndLoc Ending location of the clause.
    698   /// \param VL List of references to the variables.
    699   ///
    700   static OMPPrivateClause *Create(const ASTContext &C, SourceLocation StartLoc,
    701                                   SourceLocation LParenLoc,
    702                                   SourceLocation EndLoc, ArrayRef<Expr *> VL);
    703   /// \brief Creates an empty clause with the place for \a N variables.
    704   ///
    705   /// \param C AST context.
    706   /// \param N The number of variables.
    707   ///
    708   static OMPPrivateClause *CreateEmpty(const ASTContext &C, unsigned N);
    709 
    710   StmtRange children() {
    711     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
    712                      reinterpret_cast<Stmt **>(varlist_end()));
    713   }
    714 
    715   static bool classof(const OMPClause *T) {
    716     return T->getClauseKind() == OMPC_private;
    717   }
    718 };
    719 
    720 /// \brief This represents clause 'firstprivate' in the '#pragma omp ...'
    721 /// directives.
    722 ///
    723 /// \code
    724 /// #pragma omp parallel firstprivate(a,b)
    725 /// \endcode
    726 /// In this example directive '#pragma omp parallel' has clause 'firstprivate'
    727 /// with the variables 'a' and 'b'.
    728 ///
    729 class OMPFirstprivateClause : public OMPVarListClause<OMPFirstprivateClause> {
    730   /// \brief Build clause with number of variables \a N.
    731   ///
    732   /// \param StartLoc Starting location of the clause.
    733   /// \param LParenLoc Location of '('.
    734   /// \param EndLoc Ending location of the clause.
    735   /// \param N Number of the variables in the clause.
    736   ///
    737   OMPFirstprivateClause(SourceLocation StartLoc, SourceLocation LParenLoc,
    738                         SourceLocation EndLoc, unsigned N)
    739       : OMPVarListClause<OMPFirstprivateClause>(OMPC_firstprivate, StartLoc,
    740                                                 LParenLoc, EndLoc, N) {}
    741 
    742   /// \brief Build an empty clause.
    743   ///
    744   /// \param N Number of variables.
    745   ///
    746   explicit OMPFirstprivateClause(unsigned N)
    747       : OMPVarListClause<OMPFirstprivateClause>(
    748             OMPC_firstprivate, SourceLocation(), SourceLocation(),
    749             SourceLocation(), N) {}
    750 
    751 public:
    752   /// \brief Creates clause with a list of variables \a VL.
    753   ///
    754   /// \param C AST context.
    755   /// \param StartLoc Starting location of the clause.
    756   /// \param LParenLoc Location of '('.
    757   /// \param EndLoc Ending location of the clause.
    758   /// \param VL List of references to the variables.
    759   ///
    760   static OMPFirstprivateClause *
    761   Create(const ASTContext &C, SourceLocation StartLoc, SourceLocation LParenLoc,
    762          SourceLocation EndLoc, ArrayRef<Expr *> VL);
    763   /// \brief Creates an empty clause with the place for \a N variables.
    764   ///
    765   /// \param C AST context.
    766   /// \param N The number of variables.
    767   ///
    768   static OMPFirstprivateClause *CreateEmpty(const ASTContext &C, unsigned N);
    769 
    770   StmtRange children() {
    771     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
    772                      reinterpret_cast<Stmt **>(varlist_end()));
    773   }
    774 
    775   static bool classof(const OMPClause *T) {
    776     return T->getClauseKind() == OMPC_firstprivate;
    777   }
    778 };
    779 
    780 /// \brief This represents clause 'lastprivate' in the '#pragma omp ...'
    781 /// directives.
    782 ///
    783 /// \code
    784 /// #pragma omp simd lastprivate(a,b)
    785 /// \endcode
    786 /// In this example directive '#pragma omp simd' has clause 'lastprivate'
    787 /// with the variables 'a' and 'b'.
    788 ///
    789 class OMPLastprivateClause : public OMPVarListClause<OMPLastprivateClause> {
    790   /// \brief Build clause with number of variables \a N.
    791   ///
    792   /// \param StartLoc Starting location of the clause.
    793   /// \param LParenLoc Location of '('.
    794   /// \param EndLoc Ending location of the clause.
    795   /// \param N Number of the variables in the clause.
    796   ///
    797   OMPLastprivateClause(SourceLocation StartLoc, SourceLocation LParenLoc,
    798                        SourceLocation EndLoc, unsigned N)
    799       : OMPVarListClause<OMPLastprivateClause>(OMPC_lastprivate, StartLoc,
    800                                                LParenLoc, EndLoc, N) {}
    801 
    802   /// \brief Build an empty clause.
    803   ///
    804   /// \param N Number of variables.
    805   ///
    806   explicit OMPLastprivateClause(unsigned N)
    807       : OMPVarListClause<OMPLastprivateClause>(
    808             OMPC_lastprivate, SourceLocation(), SourceLocation(),
    809             SourceLocation(), N) {}
    810 
    811 public:
    812   /// \brief Creates clause with a list of variables \a VL.
    813   ///
    814   /// \param C AST context.
    815   /// \param StartLoc Starting location of the clause.
    816   /// \param LParenLoc Location of '('.
    817   /// \param EndLoc Ending location of the clause.
    818   /// \param VL List of references to the variables.
    819   ///
    820   static OMPLastprivateClause *
    821   Create(const ASTContext &C, SourceLocation StartLoc, SourceLocation LParenLoc,
    822          SourceLocation EndLoc, ArrayRef<Expr *> VL);
    823   /// \brief Creates an empty clause with the place for \a N variables.
    824   ///
    825   /// \param C AST context.
    826   /// \param N The number of variables.
    827   ///
    828   static OMPLastprivateClause *CreateEmpty(const ASTContext &C, unsigned N);
    829 
    830   StmtRange children() {
    831     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
    832                      reinterpret_cast<Stmt **>(varlist_end()));
    833   }
    834 
    835   static bool classof(const OMPClause *T) {
    836     return T->getClauseKind() == OMPC_lastprivate;
    837   }
    838 };
    839 
    840 /// \brief This represents clause 'shared' in the '#pragma omp ...' directives.
    841 ///
    842 /// \code
    843 /// #pragma omp parallel shared(a,b)
    844 /// \endcode
    845 /// In this example directive '#pragma omp parallel' has clause 'shared'
    846 /// with the variables 'a' and 'b'.
    847 ///
    848 class OMPSharedClause : public OMPVarListClause<OMPSharedClause> {
    849   /// \brief Build clause with number of variables \a N.
    850   ///
    851   /// \param StartLoc Starting location of the clause.
    852   /// \param LParenLoc Location of '('.
    853   /// \param EndLoc Ending location of the clause.
    854   /// \param N Number of the variables in the clause.
    855   ///
    856   OMPSharedClause(SourceLocation StartLoc, SourceLocation LParenLoc,
    857                   SourceLocation EndLoc, unsigned N)
    858       : OMPVarListClause<OMPSharedClause>(OMPC_shared, StartLoc, LParenLoc,
    859                                           EndLoc, N) {}
    860 
    861   /// \brief Build an empty clause.
    862   ///
    863   /// \param N Number of variables.
    864   ///
    865   explicit OMPSharedClause(unsigned N)
    866       : OMPVarListClause<OMPSharedClause>(OMPC_shared, SourceLocation(),
    867                                           SourceLocation(), SourceLocation(),
    868                                           N) {}
    869 
    870 public:
    871   /// \brief Creates clause with a list of variables \a VL.
    872   ///
    873   /// \param C AST context.
    874   /// \param StartLoc Starting location of the clause.
    875   /// \param LParenLoc Location of '('.
    876   /// \param EndLoc Ending location of the clause.
    877   /// \param VL List of references to the variables.
    878   ///
    879   static OMPSharedClause *Create(const ASTContext &C, SourceLocation StartLoc,
    880                                  SourceLocation LParenLoc,
    881                                  SourceLocation EndLoc, ArrayRef<Expr *> VL);
    882   /// \brief Creates an empty clause with \a N variables.
    883   ///
    884   /// \param C AST context.
    885   /// \param N The number of variables.
    886   ///
    887   static OMPSharedClause *CreateEmpty(const ASTContext &C, unsigned N);
    888 
    889   StmtRange children() {
    890     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
    891                      reinterpret_cast<Stmt **>(varlist_end()));
    892   }
    893 
    894   static bool classof(const OMPClause *T) {
    895     return T->getClauseKind() == OMPC_shared;
    896   }
    897 };
    898 
    899 /// \brief This represents clause 'reduction' in the '#pragma omp ...'
    900 /// directives.
    901 ///
    902 /// \code
    903 /// #pragma omp parallel reduction(+:a,b)
    904 /// \endcode
    905 /// In this example directive '#pragma omp parallel' has clause 'reduction'
    906 /// with operator '+' and the variables 'a' and 'b'.
    907 ///
    908 class OMPReductionClause : public OMPVarListClause<OMPReductionClause> {
    909   friend class OMPClauseReader;
    910   /// \brief Location of ':'.
    911   SourceLocation ColonLoc;
    912   /// \brief Nested name specifier for C++.
    913   NestedNameSpecifierLoc QualifierLoc;
    914   /// \brief Name of custom operator.
    915   DeclarationNameInfo NameInfo;
    916 
    917   /// \brief Build clause with number of variables \a N.
    918   ///
    919   /// \param StartLoc Starting location of the clause.
    920   /// \param LParenLoc Location of '('.
    921   /// \param EndLoc Ending location of the clause.
    922   /// \param ColonLoc Location of ':'.
    923   /// \param N Number of the variables in the clause.
    924   /// \param QualifierLoc The nested-name qualifier with location information
    925   /// \param NameInfo The full name info for reduction identifier.
    926   ///
    927   OMPReductionClause(SourceLocation StartLoc, SourceLocation LParenLoc,
    928                      SourceLocation ColonLoc, SourceLocation EndLoc, unsigned N,
    929                      NestedNameSpecifierLoc QualifierLoc,
    930                      const DeclarationNameInfo &NameInfo)
    931       : OMPVarListClause<OMPReductionClause>(OMPC_reduction, StartLoc,
    932                                              LParenLoc, EndLoc, N),
    933         ColonLoc(ColonLoc), QualifierLoc(QualifierLoc), NameInfo(NameInfo) {}
    934 
    935   /// \brief Build an empty clause.
    936   ///
    937   /// \param N Number of variables.
    938   ///
    939   explicit OMPReductionClause(unsigned N)
    940       : OMPVarListClause<OMPReductionClause>(OMPC_reduction, SourceLocation(),
    941                                              SourceLocation(), SourceLocation(),
    942                                              N),
    943         ColonLoc(), QualifierLoc(), NameInfo() {}
    944 
    945   /// \brief Sets location of ':' symbol in clause.
    946   void setColonLoc(SourceLocation CL) { ColonLoc = CL; }
    947   /// \brief Sets the name info for specified reduction identifier.
    948   void setNameInfo(DeclarationNameInfo DNI) { NameInfo = DNI; }
    949   /// \brief Sets the nested name specifier.
    950   void setQualifierLoc(NestedNameSpecifierLoc NSL) { QualifierLoc = NSL; }
    951 
    952 public:
    953   /// \brief Creates clause with a list of variables \a VL.
    954   ///
    955   /// \param StartLoc Starting location of the clause.
    956   /// \param LParenLoc Location of '('.
    957   /// \param ColonLoc Location of ':'.
    958   /// \param EndLoc Ending location of the clause.
    959   /// \param VL The variables in the clause.
    960   /// \param QualifierLoc The nested-name qualifier with location information
    961   /// \param NameInfo The full name info for reduction identifier.
    962   ///
    963   static OMPReductionClause *
    964   Create(const ASTContext &C, SourceLocation StartLoc, SourceLocation LParenLoc,
    965          SourceLocation ColonLoc, SourceLocation EndLoc, ArrayRef<Expr *> VL,
    966          NestedNameSpecifierLoc QualifierLoc,
    967          const DeclarationNameInfo &NameInfo);
    968   /// \brief Creates an empty clause with the place for \a N variables.
    969   ///
    970   /// \param C AST context.
    971   /// \param N The number of variables.
    972   ///
    973   static OMPReductionClause *CreateEmpty(const ASTContext &C, unsigned N);
    974 
    975   /// \brief Gets location of ':' symbol in clause.
    976   SourceLocation getColonLoc() const { return ColonLoc; }
    977   /// \brief Gets the name info for specified reduction identifier.
    978   const DeclarationNameInfo &getNameInfo() const { return NameInfo; }
    979   /// \brief Gets the nested name specifier.
    980   NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
    981 
    982   StmtRange children() {
    983     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
    984                      reinterpret_cast<Stmt **>(varlist_end()));
    985   }
    986 
    987   static bool classof(const OMPClause *T) {
    988     return T->getClauseKind() == OMPC_reduction;
    989   }
    990 };
    991 
    992 /// \brief This represents clause 'linear' in the '#pragma omp ...'
    993 /// directives.
    994 ///
    995 /// \code
    996 /// #pragma omp simd linear(a,b : 2)
    997 /// \endcode
    998 /// In this example directive '#pragma omp simd' has clause 'linear'
    999 /// with variables 'a', 'b' and linear step '2'.
   1000 ///
   1001 class OMPLinearClause : public OMPVarListClause<OMPLinearClause> {
   1002   friend class OMPClauseReader;
   1003   /// \brief Location of ':'.
   1004   SourceLocation ColonLoc;
   1005 
   1006   /// \brief Sets the linear step for clause.
   1007   void setStep(Expr *Step) { *varlist_end() = Step; }
   1008 
   1009   /// \brief Build 'linear' clause with given number of variables \a NumVars.
   1010   ///
   1011   /// \param StartLoc Starting location of the clause.
   1012   /// \param LParenLoc Location of '('.
   1013   /// \param ColonLoc Location of ':'.
   1014   /// \param EndLoc Ending location of the clause.
   1015   /// \param NumVars Number of variables.
   1016   ///
   1017   OMPLinearClause(SourceLocation StartLoc, SourceLocation LParenLoc,
   1018                   SourceLocation ColonLoc, SourceLocation EndLoc,
   1019                   unsigned NumVars)
   1020       : OMPVarListClause<OMPLinearClause>(OMPC_linear, StartLoc, LParenLoc,
   1021                                           EndLoc, NumVars),
   1022         ColonLoc(ColonLoc) {}
   1023 
   1024   /// \brief Build an empty clause.
   1025   ///
   1026   /// \param NumVars Number of variables.
   1027   ///
   1028   explicit OMPLinearClause(unsigned NumVars)
   1029       : OMPVarListClause<OMPLinearClause>(OMPC_linear, SourceLocation(),
   1030                                           SourceLocation(), SourceLocation(),
   1031                                           NumVars),
   1032         ColonLoc(SourceLocation()) {}
   1033 
   1034 public:
   1035   /// \brief Creates clause with a list of variables \a VL and a linear step
   1036   /// \a Step.
   1037   ///
   1038   /// \param C AST Context.
   1039   /// \param StartLoc Starting location of the clause.
   1040   /// \param LParenLoc Location of '('.
   1041   /// \param ColonLoc Location of ':'.
   1042   /// \param EndLoc Ending location of the clause.
   1043   /// \param VL List of references to the variables.
   1044   /// \param Step Linear step.
   1045   static OMPLinearClause *Create(const ASTContext &C, SourceLocation StartLoc,
   1046                                  SourceLocation LParenLoc,
   1047                                  SourceLocation ColonLoc, SourceLocation EndLoc,
   1048                                  ArrayRef<Expr *> VL, Expr *Step);
   1049 
   1050   /// \brief Creates an empty clause with the place for \a NumVars variables.
   1051   ///
   1052   /// \param C AST context.
   1053   /// \param NumVars Number of variables.
   1054   ///
   1055   static OMPLinearClause *CreateEmpty(const ASTContext &C, unsigned NumVars);
   1056 
   1057   /// \brief Sets the location of ':'.
   1058   void setColonLoc(SourceLocation Loc) { ColonLoc = Loc; }
   1059   /// \brief Returns the location of '('.
   1060   SourceLocation getColonLoc() const { return ColonLoc; }
   1061 
   1062   /// \brief Returns linear step.
   1063   Expr *getStep() { return *varlist_end(); }
   1064   /// \brief Returns linear step.
   1065   const Expr *getStep() const { return *varlist_end(); }
   1066 
   1067   StmtRange children() {
   1068     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
   1069                      reinterpret_cast<Stmt **>(varlist_end() + 1));
   1070   }
   1071 
   1072   static bool classof(const OMPClause *T) {
   1073     return T->getClauseKind() == OMPC_linear;
   1074   }
   1075 };
   1076 
   1077 /// \brief This represents clause 'aligned' in the '#pragma omp ...'
   1078 /// directives.
   1079 ///
   1080 /// \code
   1081 /// #pragma omp simd aligned(a,b : 8)
   1082 /// \endcode
   1083 /// In this example directive '#pragma omp simd' has clause 'aligned'
   1084 /// with variables 'a', 'b' and alignment '8'.
   1085 ///
   1086 class OMPAlignedClause : public OMPVarListClause<OMPAlignedClause> {
   1087   friend class OMPClauseReader;
   1088   /// \brief Location of ':'.
   1089   SourceLocation ColonLoc;
   1090 
   1091   /// \brief Sets the alignment for clause.
   1092   void setAlignment(Expr *A) { *varlist_end() = A; }
   1093 
   1094   /// \brief Build 'aligned' clause with given number of variables \a NumVars.
   1095   ///
   1096   /// \param StartLoc Starting location of the clause.
   1097   /// \param LParenLoc Location of '('.
   1098   /// \param ColonLoc Location of ':'.
   1099   /// \param EndLoc Ending location of the clause.
   1100   /// \param NumVars Number of variables.
   1101   ///
   1102   OMPAlignedClause(SourceLocation StartLoc, SourceLocation LParenLoc,
   1103                    SourceLocation ColonLoc, SourceLocation EndLoc,
   1104                    unsigned NumVars)
   1105       : OMPVarListClause<OMPAlignedClause>(OMPC_aligned, StartLoc, LParenLoc,
   1106                                            EndLoc, NumVars),
   1107         ColonLoc(ColonLoc) {}
   1108 
   1109   /// \brief Build an empty clause.
   1110   ///
   1111   /// \param NumVars Number of variables.
   1112   ///
   1113   explicit OMPAlignedClause(unsigned NumVars)
   1114       : OMPVarListClause<OMPAlignedClause>(OMPC_aligned, SourceLocation(),
   1115                                            SourceLocation(), SourceLocation(),
   1116                                            NumVars),
   1117         ColonLoc(SourceLocation()) {}
   1118 
   1119 public:
   1120   /// \brief Creates clause with a list of variables \a VL and alignment \a A.
   1121   ///
   1122   /// \param C AST Context.
   1123   /// \param StartLoc Starting location of the clause.
   1124   /// \param LParenLoc Location of '('.
   1125   /// \param ColonLoc Location of ':'.
   1126   /// \param EndLoc Ending location of the clause.
   1127   /// \param VL List of references to the variables.
   1128   /// \param A Alignment.
   1129   static OMPAlignedClause *Create(const ASTContext &C, SourceLocation StartLoc,
   1130                                   SourceLocation LParenLoc,
   1131                                   SourceLocation ColonLoc,
   1132                                   SourceLocation EndLoc, ArrayRef<Expr *> VL,
   1133                                   Expr *A);
   1134 
   1135   /// \brief Creates an empty clause with the place for \a NumVars variables.
   1136   ///
   1137   /// \param C AST context.
   1138   /// \param NumVars Number of variables.
   1139   ///
   1140   static OMPAlignedClause *CreateEmpty(const ASTContext &C, unsigned NumVars);
   1141 
   1142   /// \brief Sets the location of ':'.
   1143   void setColonLoc(SourceLocation Loc) { ColonLoc = Loc; }
   1144   /// \brief Returns the location of ':'.
   1145   SourceLocation getColonLoc() const { return ColonLoc; }
   1146 
   1147   /// \brief Returns alignment.
   1148   Expr *getAlignment() { return *varlist_end(); }
   1149   /// \brief Returns alignment.
   1150   const Expr *getAlignment() const { return *varlist_end(); }
   1151 
   1152   StmtRange children() {
   1153     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
   1154                      reinterpret_cast<Stmt **>(varlist_end() + 1));
   1155   }
   1156 
   1157   static bool classof(const OMPClause *T) {
   1158     return T->getClauseKind() == OMPC_aligned;
   1159   }
   1160 };
   1161 
   1162 /// \brief This represents clause 'copyin' in the '#pragma omp ...' directives.
   1163 ///
   1164 /// \code
   1165 /// #pragma omp parallel copyin(a,b)
   1166 /// \endcode
   1167 /// In this example directive '#pragma omp parallel' has clause 'copyin'
   1168 /// with the variables 'a' and 'b'.
   1169 ///
   1170 class OMPCopyinClause : public OMPVarListClause<OMPCopyinClause> {
   1171   /// \brief Build clause with number of variables \a N.
   1172   ///
   1173   /// \param StartLoc Starting location of the clause.
   1174   /// \param LParenLoc Location of '('.
   1175   /// \param EndLoc Ending location of the clause.
   1176   /// \param N Number of the variables in the clause.
   1177   ///
   1178   OMPCopyinClause(SourceLocation StartLoc, SourceLocation LParenLoc,
   1179                   SourceLocation EndLoc, unsigned N)
   1180       : OMPVarListClause<OMPCopyinClause>(OMPC_copyin, StartLoc, LParenLoc,
   1181                                           EndLoc, N) {}
   1182 
   1183   /// \brief Build an empty clause.
   1184   ///
   1185   /// \param N Number of variables.
   1186   ///
   1187   explicit OMPCopyinClause(unsigned N)
   1188       : OMPVarListClause<OMPCopyinClause>(OMPC_copyin, SourceLocation(),
   1189                                           SourceLocation(), SourceLocation(),
   1190                                           N) {}
   1191 
   1192 public:
   1193   /// \brief Creates clause with a list of variables \a VL.
   1194   ///
   1195   /// \param C AST context.
   1196   /// \param StartLoc Starting location of the clause.
   1197   /// \param LParenLoc Location of '('.
   1198   /// \param EndLoc Ending location of the clause.
   1199   /// \param VL List of references to the variables.
   1200   ///
   1201   static OMPCopyinClause *Create(const ASTContext &C, SourceLocation StartLoc,
   1202                                  SourceLocation LParenLoc,
   1203                                  SourceLocation EndLoc, ArrayRef<Expr *> VL);
   1204   /// \brief Creates an empty clause with \a N variables.
   1205   ///
   1206   /// \param C AST context.
   1207   /// \param N The number of variables.
   1208   ///
   1209   static OMPCopyinClause *CreateEmpty(const ASTContext &C, unsigned N);
   1210 
   1211   StmtRange children() {
   1212     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
   1213                      reinterpret_cast<Stmt **>(varlist_end()));
   1214   }
   1215 
   1216   static bool classof(const OMPClause *T) {
   1217     return T->getClauseKind() == OMPC_copyin;
   1218   }
   1219 };
   1220 
   1221 /// \brief This represents clause 'copyprivate' in the '#pragma omp ...'
   1222 /// directives.
   1223 ///
   1224 /// \code
   1225 /// #pragma omp single copyprivate(a,b)
   1226 /// \endcode
   1227 /// In this example directive '#pragma omp single' has clause 'copyprivate'
   1228 /// with the variables 'a' and 'b'.
   1229 ///
   1230 class OMPCopyprivateClause : public OMPVarListClause<OMPCopyprivateClause> {
   1231   /// \brief Build clause with number of variables \a N.
   1232   ///
   1233   /// \param StartLoc Starting location of the clause.
   1234   /// \param LParenLoc Location of '('.
   1235   /// \param EndLoc Ending location of the clause.
   1236   /// \param N Number of the variables in the clause.
   1237   ///
   1238   OMPCopyprivateClause(SourceLocation StartLoc, SourceLocation LParenLoc,
   1239                        SourceLocation EndLoc, unsigned N)
   1240       : OMPVarListClause<OMPCopyprivateClause>(OMPC_copyprivate, StartLoc,
   1241                                                LParenLoc, EndLoc, N) {}
   1242 
   1243   /// \brief Build an empty clause.
   1244   ///
   1245   /// \param N Number of variables.
   1246   ///
   1247   explicit OMPCopyprivateClause(unsigned N)
   1248       : OMPVarListClause<OMPCopyprivateClause>(
   1249             OMPC_copyprivate, SourceLocation(), SourceLocation(),
   1250             SourceLocation(), N) {}
   1251 
   1252 public:
   1253   /// \brief Creates clause with a list of variables \a VL.
   1254   ///
   1255   /// \param C AST context.
   1256   /// \param StartLoc Starting location of the clause.
   1257   /// \param LParenLoc Location of '('.
   1258   /// \param EndLoc Ending location of the clause.
   1259   /// \param VL List of references to the variables.
   1260   ///
   1261   static OMPCopyprivateClause *
   1262   Create(const ASTContext &C, SourceLocation StartLoc, SourceLocation LParenLoc,
   1263          SourceLocation EndLoc, ArrayRef<Expr *> VL);
   1264   /// \brief Creates an empty clause with \a N variables.
   1265   ///
   1266   /// \param C AST context.
   1267   /// \param N The number of variables.
   1268   ///
   1269   static OMPCopyprivateClause *CreateEmpty(const ASTContext &C, unsigned N);
   1270 
   1271   StmtRange children() {
   1272     return StmtRange(reinterpret_cast<Stmt **>(varlist_begin()),
   1273                      reinterpret_cast<Stmt **>(varlist_end()));
   1274   }
   1275 
   1276   static bool classof(const OMPClause *T) {
   1277     return T->getClauseKind() == OMPC_copyprivate;
   1278   }
   1279 };
   1280 
   1281 } // end namespace clang
   1282 
   1283 #endif
   1284