1 //===--- SemaOpenMP.cpp - Semantic Analysis for OpenMP constructs ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 /// \brief This file implements semantic analysis for OpenMP directives and
13 //===----------------------------------------------------------------------===//
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/ASTMutationListener.h"
17 #include "clang/AST/Decl.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/DeclOpenMP.h"
20 #include "clang/AST/StmtCXX.h"
21 #include "clang/AST/StmtOpenMP.h"
22 #include "clang/AST/StmtVisitor.h"
23 #include "clang/Basic/OpenMPKinds.h"
24 #include "clang/Lex/Preprocessor.h"
25 #include "clang/Sema/Initialization.h"
26 #include "clang/Sema/Lookup.h"
27 #include "clang/Sema/Scope.h"
28 #include "clang/Sema/ScopeInfo.h"
29 #include "clang/Sema/SemaInternal.h"
30 using namespace clang;
32 //===----------------------------------------------------------------------===//
33 // Stack of data-sharing attributes for variables
34 //===----------------------------------------------------------------------===//
37 /// \brief Default data sharing attributes, which can be applied to directive.
38 enum DefaultDataSharingAttributes {
39 DSA_unspecified = 0, /// \brief Data sharing attribute not specified.
40 DSA_none = 1 << 0, /// \brief Default data sharing attribute 'none'.
41 DSA_shared = 1 << 1 /// \brief Default data sharing attribute 'shared'.
44 template <class T> struct MatchesAny {
45 explicit MatchesAny(ArrayRef<T> Arr) : Arr(std::move(Arr)) {}
46 bool operator()(T Kind) {
47 for (auto KindEl : Arr)
56 struct MatchesAlways {
58 template <class T> bool operator()(T) { return true; }
61 typedef MatchesAny<OpenMPClauseKind> MatchesAnyClause;
62 typedef MatchesAny<OpenMPDirectiveKind> MatchesAnyDirective;
64 /// \brief Stack for tracking declarations used in OpenMP directives and
65 /// clauses and their data-sharing attributes.
69 OpenMPDirectiveKind DKind;
70 OpenMPClauseKind CKind;
72 SourceLocation ImplicitDSALoc;
74 : DKind(OMPD_unknown), CKind(OMPC_unknown), RefExpr(nullptr),
80 OpenMPClauseKind Attributes;
83 typedef llvm::SmallDenseMap<VarDecl *, DSAInfo, 64> DeclSAMapTy;
84 typedef llvm::SmallDenseMap<VarDecl *, DeclRefExpr *, 64> AlignedMapTy;
85 typedef llvm::DenseSet<VarDecl *> LoopControlVariablesSetTy;
88 DeclSAMapTy SharingMap;
89 AlignedMapTy AlignedMap;
90 LoopControlVariablesSetTy LCVSet;
91 DefaultDataSharingAttributes DefaultAttr;
92 SourceLocation DefaultAttrLoc;
93 OpenMPDirectiveKind Directive;
94 DeclarationNameInfo DirectiveName;
96 SourceLocation ConstructLoc;
98 unsigned CollapseNumber;
99 SourceLocation InnerTeamsRegionLoc;
100 SharingMapTy(OpenMPDirectiveKind DKind, DeclarationNameInfo Name,
101 Scope *CurScope, SourceLocation Loc)
102 : SharingMap(), AlignedMap(), LCVSet(), DefaultAttr(DSA_unspecified),
103 Directive(DKind), DirectiveName(std::move(Name)), CurScope(CurScope),
104 ConstructLoc(Loc), OrderedRegion(false), CollapseNumber(1),
105 InnerTeamsRegionLoc() {}
107 : SharingMap(), AlignedMap(), LCVSet(), DefaultAttr(DSA_unspecified),
108 Directive(OMPD_unknown), DirectiveName(), CurScope(nullptr),
109 ConstructLoc(), OrderedRegion(false), CollapseNumber(1),
110 InnerTeamsRegionLoc() {}
113 typedef SmallVector<SharingMapTy, 64> StackTy;
115 /// \brief Stack of used declaration and their data-sharing attributes.
117 /// \brief true, if check for DSA must be from parent directive, false, if
118 /// from current directive.
122 typedef SmallVector<SharingMapTy, 8>::reverse_iterator reverse_iterator;
124 DSAVarData getDSA(StackTy::reverse_iterator Iter, VarDecl *D);
126 /// \brief Checks if the variable is a local for OpenMP region.
127 bool isOpenMPLocal(VarDecl *D, StackTy::reverse_iterator Iter);
130 explicit DSAStackTy(Sema &S) : Stack(1), FromParent(false), SemaRef(S) {}
132 bool isFromParent() const { return FromParent; }
133 void setFromParent(bool Flag) { FromParent = Flag; }
135 void push(OpenMPDirectiveKind DKind, const DeclarationNameInfo &DirName,
136 Scope *CurScope, SourceLocation Loc) {
137 Stack.push_back(SharingMapTy(DKind, DirName, CurScope, Loc));
138 Stack.back().DefaultAttrLoc = Loc;
142 assert(Stack.size() > 1 && "Data-sharing attributes stack is empty!");
146 /// \brief If 'aligned' declaration for given variable \a D was not seen yet,
147 /// add it and return NULL; otherwise return previous occurrence's expression
149 DeclRefExpr *addUniqueAligned(VarDecl *D, DeclRefExpr *NewDE);
151 /// \brief Register specified variable as loop control variable.
152 void addLoopControlVariable(VarDecl *D);
153 /// \brief Check if the specified variable is a loop control variable for
155 bool isLoopControlVariable(VarDecl *D);
157 /// \brief Adds explicit data sharing attribute to the specified declaration.
158 void addDSA(VarDecl *D, DeclRefExpr *E, OpenMPClauseKind A);
160 /// \brief Returns data sharing attributes from top of the stack for the
161 /// specified declaration.
162 DSAVarData getTopDSA(VarDecl *D, bool FromParent);
163 /// \brief Returns data-sharing attributes for the specified declaration.
164 DSAVarData getImplicitDSA(VarDecl *D, bool FromParent);
165 /// \brief Checks if the specified variables has data-sharing attributes which
166 /// match specified \a CPred predicate in any directive which matches \a DPred
168 template <class ClausesPredicate, class DirectivesPredicate>
169 DSAVarData hasDSA(VarDecl *D, ClausesPredicate CPred,
170 DirectivesPredicate DPred, bool FromParent);
171 /// \brief Checks if the specified variables has data-sharing attributes which
172 /// match specified \a CPred predicate in any innermost directive which
173 /// matches \a DPred predicate.
174 template <class ClausesPredicate, class DirectivesPredicate>
175 DSAVarData hasInnermostDSA(VarDecl *D, ClausesPredicate CPred,
176 DirectivesPredicate DPred,
178 /// \brief Finds a directive which matches specified \a DPred predicate.
179 template <class NamedDirectivesPredicate>
180 bool hasDirective(NamedDirectivesPredicate DPred, bool FromParent);
182 /// \brief Returns currently analyzed directive.
183 OpenMPDirectiveKind getCurrentDirective() const {
184 return Stack.back().Directive;
186 /// \brief Returns parent directive.
187 OpenMPDirectiveKind getParentDirective() const {
188 if (Stack.size() > 2)
189 return Stack[Stack.size() - 2].Directive;
193 /// \brief Set default data sharing attribute to none.
194 void setDefaultDSANone(SourceLocation Loc) {
195 Stack.back().DefaultAttr = DSA_none;
196 Stack.back().DefaultAttrLoc = Loc;
198 /// \brief Set default data sharing attribute to shared.
199 void setDefaultDSAShared(SourceLocation Loc) {
200 Stack.back().DefaultAttr = DSA_shared;
201 Stack.back().DefaultAttrLoc = Loc;
204 DefaultDataSharingAttributes getDefaultDSA() const {
205 return Stack.back().DefaultAttr;
207 SourceLocation getDefaultDSALocation() const {
208 return Stack.back().DefaultAttrLoc;
211 /// \brief Checks if the specified variable is a threadprivate.
212 bool isThreadPrivate(VarDecl *D) {
213 DSAVarData DVar = getTopDSA(D, false);
214 return isOpenMPThreadPrivate(DVar.CKind);
217 /// \brief Marks current region as ordered (it has an 'ordered' clause).
218 void setOrderedRegion(bool IsOrdered = true) {
219 Stack.back().OrderedRegion = IsOrdered;
221 /// \brief Returns true, if parent region is ordered (has associated
222 /// 'ordered' clause), false - otherwise.
223 bool isParentOrderedRegion() const {
224 if (Stack.size() > 2)
225 return Stack[Stack.size() - 2].OrderedRegion;
229 /// \brief Set collapse value for the region.
230 void setCollapseNumber(unsigned Val) { Stack.back().CollapseNumber = Val; }
231 /// \brief Return collapse value for region.
232 unsigned getCollapseNumber() const {
233 return Stack.back().CollapseNumber;
236 /// \brief Marks current target region as one with closely nested teams
238 void setParentTeamsRegionLoc(SourceLocation TeamsRegionLoc) {
239 if (Stack.size() > 2)
240 Stack[Stack.size() - 2].InnerTeamsRegionLoc = TeamsRegionLoc;
242 /// \brief Returns true, if current region has closely nested teams region.
243 bool hasInnerTeamsRegion() const {
244 return getInnerTeamsRegionLoc().isValid();
246 /// \brief Returns location of the nested teams region (if any).
247 SourceLocation getInnerTeamsRegionLoc() const {
248 if (Stack.size() > 1)
249 return Stack.back().InnerTeamsRegionLoc;
250 return SourceLocation();
253 Scope *getCurScope() const { return Stack.back().CurScope; }
254 Scope *getCurScope() { return Stack.back().CurScope; }
255 SourceLocation getConstructLoc() { return Stack.back().ConstructLoc; }
257 bool isParallelOrTaskRegion(OpenMPDirectiveKind DKind) {
258 return isOpenMPParallelDirective(DKind) || DKind == OMPD_task ||
259 isOpenMPTeamsDirective(DKind) || DKind == OMPD_unknown;
263 DSAStackTy::DSAVarData DSAStackTy::getDSA(StackTy::reverse_iterator Iter,
265 D = D->getCanonicalDecl();
267 if (Iter == std::prev(Stack.rend())) {
268 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
269 // in a region but not in construct]
270 // File-scope or namespace-scope variables referenced in called routines
271 // in the region are shared unless they appear in a threadprivate
273 if (!D->isFunctionOrMethodVarDecl() && !isa<ParmVarDecl>(D))
274 DVar.CKind = OMPC_shared;
276 // OpenMP [2.9.1.2, Data-sharing Attribute Rules for Variables Referenced
277 // in a region but not in construct]
278 // Variables with static storage duration that are declared in called
279 // routines in the region are shared.
280 if (D->hasGlobalStorage())
281 DVar.CKind = OMPC_shared;
286 DVar.DKind = Iter->Directive;
287 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
288 // in a Construct, C/C++, predetermined, p.1]
289 // Variables with automatic storage duration that are declared in a scope
290 // inside the construct are private.
291 if (isOpenMPLocal(D, Iter) && D->isLocalVarDecl() &&
292 (D->getStorageClass() == SC_Auto || D->getStorageClass() == SC_None)) {
293 DVar.CKind = OMPC_private;
297 // Explicitly specified attributes and local variables with predetermined
299 if (Iter->SharingMap.count(D)) {
300 DVar.RefExpr = Iter->SharingMap[D].RefExpr;
301 DVar.CKind = Iter->SharingMap[D].Attributes;
302 DVar.ImplicitDSALoc = Iter->DefaultAttrLoc;
306 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
307 // in a Construct, C/C++, implicitly determined, p.1]
308 // In a parallel or task construct, the data-sharing attributes of these
309 // variables are determined by the default clause, if present.
310 switch (Iter->DefaultAttr) {
312 DVar.CKind = OMPC_shared;
313 DVar.ImplicitDSALoc = Iter->DefaultAttrLoc;
317 case DSA_unspecified:
318 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
319 // in a Construct, implicitly determined, p.2]
320 // In a parallel construct, if no default clause is present, these
321 // variables are shared.
322 DVar.ImplicitDSALoc = Iter->DefaultAttrLoc;
323 if (isOpenMPParallelDirective(DVar.DKind) ||
324 isOpenMPTeamsDirective(DVar.DKind)) {
325 DVar.CKind = OMPC_shared;
329 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
330 // in a Construct, implicitly determined, p.4]
331 // In a task construct, if no default clause is present, a variable that in
332 // the enclosing context is determined to be shared by all implicit tasks
333 // bound to the current team is shared.
334 if (DVar.DKind == OMPD_task) {
336 for (StackTy::reverse_iterator I = std::next(Iter), EE = Stack.rend();
338 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables
340 // in a Construct, implicitly determined, p.6]
341 // In a task construct, if no default clause is present, a variable
342 // whose data-sharing attribute is not determined by the rules above is
344 DVarTemp = getDSA(I, D);
345 if (DVarTemp.CKind != OMPC_shared) {
346 DVar.RefExpr = nullptr;
347 DVar.DKind = OMPD_task;
348 DVar.CKind = OMPC_firstprivate;
351 if (isParallelOrTaskRegion(I->Directive))
354 DVar.DKind = OMPD_task;
356 (DVarTemp.CKind == OMPC_unknown) ? OMPC_firstprivate : OMPC_shared;
360 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
361 // in a Construct, implicitly determined, p.3]
362 // For constructs other than task, if no default clause is present, these
363 // variables inherit their data-sharing attributes from the enclosing
365 return getDSA(std::next(Iter), D);
368 DeclRefExpr *DSAStackTy::addUniqueAligned(VarDecl *D, DeclRefExpr *NewDE) {
369 assert(Stack.size() > 1 && "Data sharing attributes stack is empty");
370 D = D->getCanonicalDecl();
371 auto It = Stack.back().AlignedMap.find(D);
372 if (It == Stack.back().AlignedMap.end()) {
373 assert(NewDE && "Unexpected nullptr expr to be added into aligned map");
374 Stack.back().AlignedMap[D] = NewDE;
377 assert(It->second && "Unexpected nullptr expr in the aligned map");
383 void DSAStackTy::addLoopControlVariable(VarDecl *D) {
384 assert(Stack.size() > 1 && "Data-sharing attributes stack is empty");
385 D = D->getCanonicalDecl();
386 Stack.back().LCVSet.insert(D);
389 bool DSAStackTy::isLoopControlVariable(VarDecl *D) {
390 assert(Stack.size() > 1 && "Data-sharing attributes stack is empty");
391 D = D->getCanonicalDecl();
392 return Stack.back().LCVSet.count(D) > 0;
395 void DSAStackTy::addDSA(VarDecl *D, DeclRefExpr *E, OpenMPClauseKind A) {
396 D = D->getCanonicalDecl();
397 if (A == OMPC_threadprivate) {
398 Stack[0].SharingMap[D].Attributes = A;
399 Stack[0].SharingMap[D].RefExpr = E;
401 assert(Stack.size() > 1 && "Data-sharing attributes stack is empty");
402 Stack.back().SharingMap[D].Attributes = A;
403 Stack.back().SharingMap[D].RefExpr = E;
407 bool DSAStackTy::isOpenMPLocal(VarDecl *D, StackTy::reverse_iterator Iter) {
408 D = D->getCanonicalDecl();
409 if (Stack.size() > 2) {
410 reverse_iterator I = Iter, E = std::prev(Stack.rend());
411 Scope *TopScope = nullptr;
412 while (I != E && !isParallelOrTaskRegion(I->Directive)) {
417 TopScope = I->CurScope ? I->CurScope->getParent() : nullptr;
418 Scope *CurScope = getCurScope();
419 while (CurScope != TopScope && !CurScope->isDeclScope(D)) {
420 CurScope = CurScope->getParent();
422 return CurScope != TopScope;
427 /// \brief Build a variable declaration for OpenMP loop iteration variable.
428 static VarDecl *buildVarDecl(Sema &SemaRef, SourceLocation Loc, QualType Type,
430 DeclContext *DC = SemaRef.CurContext;
431 IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name);
432 TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc);
434 VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, TInfo, SC_None);
439 static DeclRefExpr *buildDeclRefExpr(Sema &S, VarDecl *D, QualType Ty,
441 bool RefersToCapture = false) {
443 D->markUsed(S.Context);
444 return DeclRefExpr::Create(S.getASTContext(), NestedNameSpecifierLoc(),
445 SourceLocation(), D, RefersToCapture, Loc, Ty,
449 DSAStackTy::DSAVarData DSAStackTy::getTopDSA(VarDecl *D, bool FromParent) {
450 D = D->getCanonicalDecl();
453 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
454 // in a Construct, C/C++, predetermined, p.1]
455 // Variables appearing in threadprivate directives are threadprivate.
456 if (D->getTLSKind() != VarDecl::TLS_None ||
457 (D->getStorageClass() == SC_Register && D->hasAttr<AsmLabelAttr>() &&
458 !D->isLocalVarDecl())) {
459 addDSA(D, buildDeclRefExpr(SemaRef, D, D->getType().getNonReferenceType(),
463 if (Stack[0].SharingMap.count(D)) {
464 DVar.RefExpr = Stack[0].SharingMap[D].RefExpr;
465 DVar.CKind = OMPC_threadprivate;
469 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
470 // in a Construct, C/C++, predetermined, p.1]
471 // Variables with automatic storage duration that are declared in a scope
472 // inside the construct are private.
473 OpenMPDirectiveKind Kind =
474 FromParent ? getParentDirective() : getCurrentDirective();
475 auto StartI = std::next(Stack.rbegin());
476 auto EndI = std::prev(Stack.rend());
477 if (FromParent && StartI != EndI) {
478 StartI = std::next(StartI);
480 if (!isParallelOrTaskRegion(Kind)) {
481 if (isOpenMPLocal(D, StartI) &&
482 ((D->isLocalVarDecl() && (D->getStorageClass() == SC_Auto ||
483 D->getStorageClass() == SC_None)) ||
484 isa<ParmVarDecl>(D))) {
485 DVar.CKind = OMPC_private;
489 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
490 // in a Construct, C/C++, predetermined, p.4]
491 // Static data members are shared.
492 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
493 // in a Construct, C/C++, predetermined, p.7]
494 // Variables with static storage duration that are declared in a scope
495 // inside the construct are shared.
496 if (D->isStaticDataMember() || D->isStaticLocal()) {
497 DSAVarData DVarTemp =
498 hasDSA(D, isOpenMPPrivate, MatchesAlways(), FromParent);
499 if (DVarTemp.CKind != OMPC_unknown && DVarTemp.RefExpr)
502 DVar.CKind = OMPC_shared;
507 QualType Type = D->getType().getNonReferenceType().getCanonicalType();
508 bool IsConstant = Type.isConstant(SemaRef.getASTContext());
509 Type = SemaRef.getASTContext().getBaseElementType(Type);
510 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
511 // in a Construct, C/C++, predetermined, p.6]
512 // Variables with const qualified type having no mutable member are
515 SemaRef.getLangOpts().CPlusPlus ? Type->getAsCXXRecordDecl() : nullptr;
517 !(SemaRef.getLangOpts().CPlusPlus && RD && RD->hasMutableFields())) {
518 // Variables with const-qualified type having no mutable member may be
519 // listed in a firstprivate clause, even if they are static data members.
520 DSAVarData DVarTemp = hasDSA(D, MatchesAnyClause(OMPC_firstprivate),
521 MatchesAlways(), FromParent);
522 if (DVarTemp.CKind == OMPC_firstprivate && DVarTemp.RefExpr)
525 DVar.CKind = OMPC_shared;
529 // Explicitly specified attributes and local variables with predetermined
531 auto I = std::prev(StartI);
532 if (I->SharingMap.count(D)) {
533 DVar.RefExpr = I->SharingMap[D].RefExpr;
534 DVar.CKind = I->SharingMap[D].Attributes;
535 DVar.ImplicitDSALoc = I->DefaultAttrLoc;
541 DSAStackTy::DSAVarData DSAStackTy::getImplicitDSA(VarDecl *D, bool FromParent) {
542 D = D->getCanonicalDecl();
543 auto StartI = Stack.rbegin();
544 auto EndI = std::prev(Stack.rend());
545 if (FromParent && StartI != EndI) {
546 StartI = std::next(StartI);
548 return getDSA(StartI, D);
551 template <class ClausesPredicate, class DirectivesPredicate>
552 DSAStackTy::DSAVarData DSAStackTy::hasDSA(VarDecl *D, ClausesPredicate CPred,
553 DirectivesPredicate DPred,
555 D = D->getCanonicalDecl();
556 auto StartI = std::next(Stack.rbegin());
557 auto EndI = std::prev(Stack.rend());
558 if (FromParent && StartI != EndI) {
559 StartI = std::next(StartI);
561 for (auto I = StartI, EE = EndI; I != EE; ++I) {
562 if (!DPred(I->Directive) && !isParallelOrTaskRegion(I->Directive))
564 DSAVarData DVar = getDSA(I, D);
565 if (CPred(DVar.CKind))
571 template <class ClausesPredicate, class DirectivesPredicate>
572 DSAStackTy::DSAVarData
573 DSAStackTy::hasInnermostDSA(VarDecl *D, ClausesPredicate CPred,
574 DirectivesPredicate DPred, bool FromParent) {
575 D = D->getCanonicalDecl();
576 auto StartI = std::next(Stack.rbegin());
577 auto EndI = std::prev(Stack.rend());
578 if (FromParent && StartI != EndI) {
579 StartI = std::next(StartI);
581 for (auto I = StartI, EE = EndI; I != EE; ++I) {
582 if (!DPred(I->Directive))
584 DSAVarData DVar = getDSA(I, D);
585 if (CPred(DVar.CKind))
592 template <class NamedDirectivesPredicate>
593 bool DSAStackTy::hasDirective(NamedDirectivesPredicate DPred, bool FromParent) {
594 auto StartI = std::next(Stack.rbegin());
595 auto EndI = std::prev(Stack.rend());
596 if (FromParent && StartI != EndI) {
597 StartI = std::next(StartI);
599 for (auto I = StartI, EE = EndI; I != EE; ++I) {
600 if (DPred(I->Directive, I->DirectiveName, I->ConstructLoc))
606 void Sema::InitDataSharingAttributesStack() {
607 VarDataSharingAttributesStack = new DSAStackTy(*this);
610 #define DSAStack static_cast<DSAStackTy *>(VarDataSharingAttributesStack)
612 bool Sema::IsOpenMPCapturedVar(VarDecl *VD) {
613 assert(LangOpts.OpenMP && "OpenMP is not allowed");
614 VD = VD->getCanonicalDecl();
615 if (DSAStack->getCurrentDirective() != OMPD_unknown) {
616 if (DSAStack->isLoopControlVariable(VD) ||
617 (VD->hasLocalStorage() &&
618 isParallelOrTaskRegion(DSAStack->getCurrentDirective())))
620 auto DVarPrivate = DSAStack->getTopDSA(VD, DSAStack->isFromParent());
621 if (DVarPrivate.CKind != OMPC_unknown && isOpenMPPrivate(DVarPrivate.CKind))
623 DVarPrivate = DSAStack->hasDSA(VD, isOpenMPPrivate, MatchesAlways(),
624 DSAStack->isFromParent());
625 return DVarPrivate.CKind != OMPC_unknown;
630 void Sema::DestroyDataSharingAttributesStack() { delete DSAStack; }
632 void Sema::StartOpenMPDSABlock(OpenMPDirectiveKind DKind,
633 const DeclarationNameInfo &DirName,
634 Scope *CurScope, SourceLocation Loc) {
635 DSAStack->push(DKind, DirName, CurScope, Loc);
636 PushExpressionEvaluationContext(PotentiallyEvaluated);
639 void Sema::StartOpenMPClauses() {
640 DSAStack->setFromParent(/*Flag=*/true);
643 void Sema::EndOpenMPClauses() {
644 DSAStack->setFromParent(/*Flag=*/false);
647 void Sema::EndOpenMPDSABlock(Stmt *CurDirective) {
648 // OpenMP [2.14.3.5, Restrictions, C/C++, p.1]
649 // A variable of class type (or array thereof) that appears in a lastprivate
650 // clause requires an accessible, unambiguous default constructor for the
651 // class type, unless the list item is also specified in a firstprivate
653 if (auto D = dyn_cast_or_null<OMPExecutableDirective>(CurDirective)) {
654 for (auto *C : D->clauses()) {
655 if (auto *Clause = dyn_cast<OMPLastprivateClause>(C)) {
656 SmallVector<Expr *, 8> PrivateCopies;
657 for (auto *DE : Clause->varlists()) {
658 if (DE->isValueDependent() || DE->isTypeDependent()) {
659 PrivateCopies.push_back(nullptr);
662 auto *VD = cast<VarDecl>(cast<DeclRefExpr>(DE)->getDecl());
663 QualType Type = VD->getType();
664 auto DVar = DSAStack->getTopDSA(VD, false);
665 if (DVar.CKind == OMPC_lastprivate) {
666 // Generate helper private variable and initialize it with the
667 // default value. The address of the original variable is replaced
668 // by the address of the new private variable in CodeGen. This new
669 // variable is not added to IdResolver, so the code in the OpenMP
670 // region uses original variable for proper diagnostics.
672 buildVarDecl(*this, DE->getExprLoc(), Type.getUnqualifiedType(),
674 ActOnUninitializedDecl(VDPrivate, /*TypeMayContainAuto=*/false);
675 if (VDPrivate->isInvalidDecl())
677 PrivateCopies.push_back(buildDeclRefExpr(
678 *this, VDPrivate, DE->getType(), DE->getExprLoc()));
680 // The variable is also a firstprivate, so initialization sequence
681 // for private copy is generated already.
682 PrivateCopies.push_back(nullptr);
685 // Set initializers to private copies if no errors were found.
686 if (PrivateCopies.size() == Clause->varlist_size()) {
687 Clause->setPrivateCopies(PrivateCopies);
694 DiscardCleanupsInEvaluationContext();
695 PopExpressionEvaluationContext();
698 static bool FinishOpenMPLinearClause(OMPLinearClause &Clause, DeclRefExpr *IV,
699 Expr *NumIterations, Sema &SemaRef,
704 class VarDeclFilterCCC : public CorrectionCandidateCallback {
709 explicit VarDeclFilterCCC(Sema &S) : SemaRef(S) {}
710 bool ValidateCandidate(const TypoCorrection &Candidate) override {
711 NamedDecl *ND = Candidate.getCorrectionDecl();
712 if (VarDecl *VD = dyn_cast_or_null<VarDecl>(ND)) {
713 return VD->hasGlobalStorage() &&
714 SemaRef.isDeclInScope(ND, SemaRef.getCurLexicalContext(),
715 SemaRef.getCurScope());
722 ExprResult Sema::ActOnOpenMPIdExpression(Scope *CurScope,
723 CXXScopeSpec &ScopeSpec,
724 const DeclarationNameInfo &Id) {
725 LookupResult Lookup(*this, Id, LookupOrdinaryName);
726 LookupParsedName(Lookup, CurScope, &ScopeSpec, true);
728 if (Lookup.isAmbiguous())
732 if (!Lookup.isSingleResult()) {
733 if (TypoCorrection Corrected = CorrectTypo(
734 Id, LookupOrdinaryName, CurScope, nullptr,
735 llvm::make_unique<VarDeclFilterCCC>(*this), CTK_ErrorRecovery)) {
736 diagnoseTypo(Corrected,
738 ? diag::err_undeclared_var_use_suggest
739 : diag::err_omp_expected_var_arg_suggest)
741 VD = Corrected.getCorrectionDeclAs<VarDecl>();
743 Diag(Id.getLoc(), Lookup.empty() ? diag::err_undeclared_var_use
744 : diag::err_omp_expected_var_arg)
749 if (!(VD = Lookup.getAsSingle<VarDecl>())) {
750 Diag(Id.getLoc(), diag::err_omp_expected_var_arg) << Id.getName();
751 Diag(Lookup.getFoundDecl()->getLocation(), diag::note_declared_at);
755 Lookup.suppressDiagnostics();
757 // OpenMP [2.9.2, Syntax, C/C++]
758 // Variables must be file-scope, namespace-scope, or static block-scope.
759 if (!VD->hasGlobalStorage()) {
760 Diag(Id.getLoc(), diag::err_omp_global_var_arg)
761 << getOpenMPDirectiveName(OMPD_threadprivate) << !VD->isStaticLocal();
763 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
764 Diag(VD->getLocation(),
765 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
770 VarDecl *CanonicalVD = VD->getCanonicalDecl();
771 NamedDecl *ND = cast<NamedDecl>(CanonicalVD);
772 // OpenMP [2.9.2, Restrictions, C/C++, p.2]
773 // A threadprivate directive for file-scope variables must appear outside
774 // any definition or declaration.
775 if (CanonicalVD->getDeclContext()->isTranslationUnit() &&
776 !getCurLexicalContext()->isTranslationUnit()) {
777 Diag(Id.getLoc(), diag::err_omp_var_scope)
778 << getOpenMPDirectiveName(OMPD_threadprivate) << VD;
780 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
781 Diag(VD->getLocation(),
782 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
786 // OpenMP [2.9.2, Restrictions, C/C++, p.3]
787 // A threadprivate directive for static class member variables must appear
788 // in the class definition, in the same scope in which the member
789 // variables are declared.
790 if (CanonicalVD->isStaticDataMember() &&
791 !CanonicalVD->getDeclContext()->Equals(getCurLexicalContext())) {
792 Diag(Id.getLoc(), diag::err_omp_var_scope)
793 << getOpenMPDirectiveName(OMPD_threadprivate) << VD;
795 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
796 Diag(VD->getLocation(),
797 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
801 // OpenMP [2.9.2, Restrictions, C/C++, p.4]
802 // A threadprivate directive for namespace-scope variables must appear
803 // outside any definition or declaration other than the namespace
804 // definition itself.
805 if (CanonicalVD->getDeclContext()->isNamespace() &&
806 (!getCurLexicalContext()->isFileContext() ||
807 !getCurLexicalContext()->Encloses(CanonicalVD->getDeclContext()))) {
808 Diag(Id.getLoc(), diag::err_omp_var_scope)
809 << getOpenMPDirectiveName(OMPD_threadprivate) << VD;
811 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
812 Diag(VD->getLocation(),
813 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
817 // OpenMP [2.9.2, Restrictions, C/C++, p.6]
818 // A threadprivate directive for static block-scope variables must appear
819 // in the scope of the variable and not in a nested scope.
820 if (CanonicalVD->isStaticLocal() && CurScope &&
821 !isDeclInScope(ND, getCurLexicalContext(), CurScope)) {
822 Diag(Id.getLoc(), diag::err_omp_var_scope)
823 << getOpenMPDirectiveName(OMPD_threadprivate) << VD;
825 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
826 Diag(VD->getLocation(),
827 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
832 // OpenMP [2.9.2, Restrictions, C/C++, p.2-6]
833 // A threadprivate directive must lexically precede all references to any
834 // of the variables in its list.
835 if (VD->isUsed() && !DSAStack->isThreadPrivate(VD)) {
836 Diag(Id.getLoc(), diag::err_omp_var_used)
837 << getOpenMPDirectiveName(OMPD_threadprivate) << VD;
841 QualType ExprType = VD->getType().getNonReferenceType();
842 ExprResult DE = buildDeclRefExpr(*this, VD, ExprType, Id.getLoc());
847 Sema::ActOnOpenMPThreadprivateDirective(SourceLocation Loc,
848 ArrayRef<Expr *> VarList) {
849 if (OMPThreadPrivateDecl *D = CheckOMPThreadPrivateDecl(Loc, VarList)) {
850 CurContext->addDecl(D);
851 return DeclGroupPtrTy::make(DeclGroupRef(D));
853 return DeclGroupPtrTy();
857 class LocalVarRefChecker : public ConstStmtVisitor<LocalVarRefChecker, bool> {
861 bool VisitDeclRefExpr(const DeclRefExpr *E) {
862 if (auto VD = dyn_cast<VarDecl>(E->getDecl())) {
863 if (VD->hasLocalStorage()) {
864 SemaRef.Diag(E->getLocStart(),
865 diag::err_omp_local_var_in_threadprivate_init)
866 << E->getSourceRange();
867 SemaRef.Diag(VD->getLocation(), diag::note_defined_here)
868 << VD << VD->getSourceRange();
874 bool VisitStmt(const Stmt *S) {
875 for (auto Child : S->children()) {
876 if (Child && Visit(Child))
881 explicit LocalVarRefChecker(Sema &SemaRef) : SemaRef(SemaRef) {}
885 OMPThreadPrivateDecl *
886 Sema::CheckOMPThreadPrivateDecl(SourceLocation Loc, ArrayRef<Expr *> VarList) {
887 SmallVector<Expr *, 8> Vars;
888 for (auto &RefExpr : VarList) {
889 DeclRefExpr *DE = cast<DeclRefExpr>(RefExpr);
890 VarDecl *VD = cast<VarDecl>(DE->getDecl());
891 SourceLocation ILoc = DE->getExprLoc();
893 QualType QType = VD->getType();
894 if (QType->isDependentType() || QType->isInstantiationDependentType()) {
895 // It will be analyzed later.
900 // OpenMP [2.9.2, Restrictions, C/C++, p.10]
901 // A threadprivate variable must not have an incomplete type.
902 if (RequireCompleteType(ILoc, VD->getType(),
903 diag::err_omp_threadprivate_incomplete_type)) {
907 // OpenMP [2.9.2, Restrictions, C/C++, p.10]
908 // A threadprivate variable must not have a reference type.
909 if (VD->getType()->isReferenceType()) {
910 Diag(ILoc, diag::err_omp_ref_type_arg)
911 << getOpenMPDirectiveName(OMPD_threadprivate) << VD->getType();
913 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
914 Diag(VD->getLocation(),
915 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
920 // Check if this is a TLS variable.
921 if (VD->getTLSKind() != VarDecl::TLS_None ||
922 (VD->getStorageClass() == SC_Register && VD->hasAttr<AsmLabelAttr>() &&
923 !VD->isLocalVarDecl())) {
924 Diag(ILoc, diag::err_omp_var_thread_local)
925 << VD << ((VD->getTLSKind() != VarDecl::TLS_None) ? 0 : 1);
927 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
928 Diag(VD->getLocation(),
929 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
934 // Check if initial value of threadprivate variable reference variable with
935 // local storage (it is not supported by runtime).
936 if (auto Init = VD->getAnyInitializer()) {
937 LocalVarRefChecker Checker(*this);
938 if (Checker.Visit(Init))
942 Vars.push_back(RefExpr);
943 DSAStack->addDSA(VD, DE, OMPC_threadprivate);
944 VD->addAttr(OMPThreadPrivateDeclAttr::CreateImplicit(
945 Context, SourceRange(Loc, Loc)));
946 if (auto *ML = Context.getASTMutationListener())
947 ML->DeclarationMarkedOpenMPThreadPrivate(VD);
949 OMPThreadPrivateDecl *D = nullptr;
951 D = OMPThreadPrivateDecl::Create(Context, getCurLexicalContext(), Loc,
953 D->setAccess(AS_public);
958 static void ReportOriginalDSA(Sema &SemaRef, DSAStackTy *Stack,
959 const VarDecl *VD, DSAStackTy::DSAVarData DVar,
960 bool IsLoopIterVar = false) {
962 SemaRef.Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_explicit_dsa)
963 << getOpenMPClauseName(DVar.CKind);
967 PDSA_StaticMemberShared,
968 PDSA_StaticLocalVarShared,
969 PDSA_LoopIterVarPrivate,
970 PDSA_LoopIterVarLinear,
971 PDSA_LoopIterVarLastprivate,
973 PDSA_GlobalVarShared,
974 PDSA_TaskVarFirstprivate,
975 PDSA_LocalVarPrivate,
977 } Reason = PDSA_Implicit;
978 bool ReportHint = false;
979 auto ReportLoc = VD->getLocation();
981 if (DVar.CKind == OMPC_private)
982 Reason = PDSA_LoopIterVarPrivate;
983 else if (DVar.CKind == OMPC_lastprivate)
984 Reason = PDSA_LoopIterVarLastprivate;
986 Reason = PDSA_LoopIterVarLinear;
987 } else if (DVar.DKind == OMPD_task && DVar.CKind == OMPC_firstprivate) {
988 Reason = PDSA_TaskVarFirstprivate;
989 ReportLoc = DVar.ImplicitDSALoc;
990 } else if (VD->isStaticLocal())
991 Reason = PDSA_StaticLocalVarShared;
992 else if (VD->isStaticDataMember())
993 Reason = PDSA_StaticMemberShared;
994 else if (VD->isFileVarDecl())
995 Reason = PDSA_GlobalVarShared;
996 else if (VD->getType().isConstant(SemaRef.getASTContext()))
997 Reason = PDSA_ConstVarShared;
998 else if (VD->isLocalVarDecl() && DVar.CKind == OMPC_private) {
1000 Reason = PDSA_LocalVarPrivate;
1002 if (Reason != PDSA_Implicit) {
1003 SemaRef.Diag(ReportLoc, diag::note_omp_predetermined_dsa)
1004 << Reason << ReportHint
1005 << getOpenMPDirectiveName(Stack->getCurrentDirective());
1006 } else if (DVar.ImplicitDSALoc.isValid()) {
1007 SemaRef.Diag(DVar.ImplicitDSALoc, diag::note_omp_implicit_dsa)
1008 << getOpenMPClauseName(DVar.CKind);
1013 class DSAAttrChecker : public StmtVisitor<DSAAttrChecker, void> {
1018 llvm::SmallVector<Expr *, 8> ImplicitFirstprivate;
1019 llvm::DenseMap<VarDecl *, Expr *> VarsWithInheritedDSA;
1022 void VisitDeclRefExpr(DeclRefExpr *E) {
1023 if (auto *VD = dyn_cast<VarDecl>(E->getDecl())) {
1024 // Skip internally declared variables.
1025 if (VD->isLocalVarDecl() && !CS->capturesVariable(VD))
1028 auto DVar = Stack->getTopDSA(VD, false);
1029 // Check if the variable has explicit DSA set and stop analysis if it so.
1030 if (DVar.RefExpr) return;
1032 auto ELoc = E->getExprLoc();
1033 auto DKind = Stack->getCurrentDirective();
1034 // The default(none) clause requires that each variable that is referenced
1035 // in the construct, and does not have a predetermined data-sharing
1036 // attribute, must have its data-sharing attribute explicitly determined
1037 // by being listed in a data-sharing attribute clause.
1038 if (DVar.CKind == OMPC_unknown && Stack->getDefaultDSA() == DSA_none &&
1039 isParallelOrTaskRegion(DKind) &&
1040 VarsWithInheritedDSA.count(VD) == 0) {
1041 VarsWithInheritedDSA[VD] = E;
1045 // OpenMP [2.9.3.6, Restrictions, p.2]
1046 // A list item that appears in a reduction clause of the innermost
1047 // enclosing worksharing or parallel construct may not be accessed in an
1049 DVar = Stack->hasInnermostDSA(VD, MatchesAnyClause(OMPC_reduction),
1050 [](OpenMPDirectiveKind K) -> bool {
1051 return isOpenMPParallelDirective(K) ||
1052 isOpenMPWorksharingDirective(K) ||
1053 isOpenMPTeamsDirective(K);
1056 if (DKind == OMPD_task && DVar.CKind == OMPC_reduction) {
1058 SemaRef.Diag(ELoc, diag::err_omp_reduction_in_task);
1059 ReportOriginalDSA(SemaRef, Stack, VD, DVar);
1063 // Define implicit data-sharing attributes for task.
1064 DVar = Stack->getImplicitDSA(VD, false);
1065 if (DKind == OMPD_task && DVar.CKind != OMPC_shared)
1066 ImplicitFirstprivate.push_back(E);
1069 void VisitOMPExecutableDirective(OMPExecutableDirective *S) {
1070 for (auto *C : S->clauses()) {
1071 // Skip analysis of arguments of implicitly defined firstprivate clause
1072 // for task directives.
1073 if (C && (!isa<OMPFirstprivateClause>(C) || C->getLocStart().isValid()))
1074 for (auto *CC : C->children()) {
1080 void VisitStmt(Stmt *S) {
1081 for (auto *C : S->children()) {
1082 if (C && !isa<OMPExecutableDirective>(C))
1087 bool isErrorFound() { return ErrorFound; }
1088 ArrayRef<Expr *> getImplicitFirstprivate() { return ImplicitFirstprivate; }
1089 llvm::DenseMap<VarDecl *, Expr *> &getVarsWithInheritedDSA() {
1090 return VarsWithInheritedDSA;
1093 DSAAttrChecker(DSAStackTy *S, Sema &SemaRef, CapturedStmt *CS)
1094 : Stack(S), SemaRef(SemaRef), ErrorFound(false), CS(CS) {}
1098 void Sema::ActOnOpenMPRegionStart(OpenMPDirectiveKind DKind, Scope *CurScope) {
1100 case OMPD_parallel: {
1101 QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
1102 QualType KmpInt32PtrTy = Context.getPointerType(KmpInt32Ty);
1103 Sema::CapturedParamNameType Params[] = {
1104 std::make_pair(".global_tid.", KmpInt32PtrTy),
1105 std::make_pair(".bound_tid.", KmpInt32PtrTy),
1106 std::make_pair(StringRef(), QualType()) // __context with shared vars
1108 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1113 Sema::CapturedParamNameType Params[] = {
1114 std::make_pair(StringRef(), QualType()) // __context with shared vars
1116 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1121 Sema::CapturedParamNameType Params[] = {
1122 std::make_pair(StringRef(), QualType()) // __context with shared vars
1124 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1128 case OMPD_for_simd: {
1129 Sema::CapturedParamNameType Params[] = {
1130 std::make_pair(StringRef(), QualType()) // __context with shared vars
1132 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1136 case OMPD_sections: {
1137 Sema::CapturedParamNameType Params[] = {
1138 std::make_pair(StringRef(), QualType()) // __context with shared vars
1140 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1144 case OMPD_section: {
1145 Sema::CapturedParamNameType Params[] = {
1146 std::make_pair(StringRef(), QualType()) // __context with shared vars
1148 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1153 Sema::CapturedParamNameType Params[] = {
1154 std::make_pair(StringRef(), QualType()) // __context with shared vars
1156 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1161 Sema::CapturedParamNameType Params[] = {
1162 std::make_pair(StringRef(), QualType()) // __context with shared vars
1164 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1168 case OMPD_critical: {
1169 Sema::CapturedParamNameType Params[] = {
1170 std::make_pair(StringRef(), QualType()) // __context with shared vars
1172 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1176 case OMPD_parallel_for: {
1177 QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
1178 QualType KmpInt32PtrTy = Context.getPointerType(KmpInt32Ty);
1179 Sema::CapturedParamNameType Params[] = {
1180 std::make_pair(".global_tid.", KmpInt32PtrTy),
1181 std::make_pair(".bound_tid.", KmpInt32PtrTy),
1182 std::make_pair(StringRef(), QualType()) // __context with shared vars
1184 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1188 case OMPD_parallel_for_simd: {
1189 QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
1190 QualType KmpInt32PtrTy = Context.getPointerType(KmpInt32Ty);
1191 Sema::CapturedParamNameType Params[] = {
1192 std::make_pair(".global_tid.", KmpInt32PtrTy),
1193 std::make_pair(".bound_tid.", KmpInt32PtrTy),
1194 std::make_pair(StringRef(), QualType()) // __context with shared vars
1196 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1200 case OMPD_parallel_sections: {
1201 QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
1202 QualType KmpInt32PtrTy = Context.getPointerType(KmpInt32Ty);
1203 Sema::CapturedParamNameType Params[] = {
1204 std::make_pair(".global_tid.", KmpInt32PtrTy),
1205 std::make_pair(".bound_tid.", KmpInt32PtrTy),
1206 std::make_pair(StringRef(), QualType()) // __context with shared vars
1208 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1213 QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
1214 QualType Args[] = {Context.VoidPtrTy.withConst().withRestrict()};
1215 FunctionProtoType::ExtProtoInfo EPI;
1216 EPI.Variadic = true;
1217 QualType CopyFnType = Context.getFunctionType(Context.VoidTy, Args, EPI);
1218 Sema::CapturedParamNameType Params[] = {
1219 std::make_pair(".global_tid.", KmpInt32Ty),
1220 std::make_pair(".part_id.", KmpInt32Ty),
1221 std::make_pair(".privates.",
1222 Context.VoidPtrTy.withConst().withRestrict()),
1225 Context.getPointerType(CopyFnType).withConst().withRestrict()),
1226 std::make_pair(StringRef(), QualType()) // __context with shared vars
1228 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1230 // Mark this captured region as inlined, because we don't use outlined
1231 // function directly.
1232 getCurCapturedRegion()->TheCapturedDecl->addAttr(
1233 AlwaysInlineAttr::CreateImplicit(
1234 Context, AlwaysInlineAttr::Keyword_forceinline, SourceRange()));
1237 case OMPD_ordered: {
1238 Sema::CapturedParamNameType Params[] = {
1239 std::make_pair(StringRef(), QualType()) // __context with shared vars
1241 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1246 Sema::CapturedParamNameType Params[] = {
1247 std::make_pair(StringRef(), QualType()) // __context with shared vars
1249 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1254 Sema::CapturedParamNameType Params[] = {
1255 std::make_pair(StringRef(), QualType()) // __context with shared vars
1257 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1262 QualType KmpInt32Ty = Context.getIntTypeForBitwidth(32, 1);
1263 QualType KmpInt32PtrTy = Context.getPointerType(KmpInt32Ty);
1264 Sema::CapturedParamNameType Params[] = {
1265 std::make_pair(".global_tid.", KmpInt32PtrTy),
1266 std::make_pair(".bound_tid.", KmpInt32PtrTy),
1267 std::make_pair(StringRef(), QualType()) // __context with shared vars
1269 ActOnCapturedRegionStart(DSAStack->getConstructLoc(), CurScope, CR_OpenMP,
1273 case OMPD_threadprivate:
1274 case OMPD_taskyield:
1278 llvm_unreachable("OpenMP Directive is not allowed");
1280 llvm_unreachable("Unknown OpenMP directive");
1284 StmtResult Sema::ActOnOpenMPRegionEnd(StmtResult S,
1285 ArrayRef<OMPClause *> Clauses) {
1286 if (!S.isUsable()) {
1287 ActOnCapturedRegionError();
1290 // This is required for proper codegen.
1291 for (auto *Clause : Clauses) {
1292 if (isOpenMPPrivate(Clause->getClauseKind()) ||
1293 Clause->getClauseKind() == OMPC_copyprivate) {
1294 // Mark all variables in private list clauses as used in inner region.
1295 for (auto *VarRef : Clause->children()) {
1296 if (auto *E = cast_or_null<Expr>(VarRef)) {
1297 MarkDeclarationsReferencedInExpr(E);
1300 } else if (isParallelOrTaskRegion(DSAStack->getCurrentDirective()) &&
1301 Clause->getClauseKind() == OMPC_schedule) {
1302 // Mark all variables in private list clauses as used in inner region.
1303 // Required for proper codegen of combined directives.
1304 // TODO: add processing for other clauses.
1305 if (auto *E = cast_or_null<Expr>(
1306 cast<OMPScheduleClause>(Clause)->getHelperChunkSize())) {
1307 MarkDeclarationsReferencedInExpr(E);
1311 return ActOnCapturedRegionEnd(S.get());
1314 static bool CheckNestingOfRegions(Sema &SemaRef, DSAStackTy *Stack,
1315 OpenMPDirectiveKind CurrentRegion,
1316 const DeclarationNameInfo &CurrentName,
1317 SourceLocation StartLoc) {
1318 // Allowed nesting of constructs
1319 // +------------------+-----------------+------------------------------------+
1320 // | Parent directive | Child directive | Closely (!), No-Closely(+), Both(*)|
1321 // +------------------+-----------------+------------------------------------+
1322 // | parallel | parallel | * |
1323 // | parallel | for | * |
1324 // | parallel | for simd | * |
1325 // | parallel | master | * |
1326 // | parallel | critical | * |
1327 // | parallel | simd | * |
1328 // | parallel | sections | * |
1329 // | parallel | section | + |
1330 // | parallel | single | * |
1331 // | parallel | parallel for | * |
1332 // | parallel |parallel for simd| * |
1333 // | parallel |parallel sections| * |
1334 // | parallel | task | * |
1335 // | parallel | taskyield | * |
1336 // | parallel | barrier | * |
1337 // | parallel | taskwait | * |
1338 // | parallel | flush | * |
1339 // | parallel | ordered | + |
1340 // | parallel | atomic | * |
1341 // | parallel | target | * |
1342 // | parallel | teams | + |
1343 // +------------------+-----------------+------------------------------------+
1344 // | for | parallel | * |
1345 // | for | for | + |
1346 // | for | for simd | + |
1347 // | for | master | + |
1348 // | for | critical | * |
1349 // | for | simd | * |
1350 // | for | sections | + |
1351 // | for | section | + |
1352 // | for | single | + |
1353 // | for | parallel for | * |
1354 // | for |parallel for simd| * |
1355 // | for |parallel sections| * |
1356 // | for | task | * |
1357 // | for | taskyield | * |
1358 // | for | barrier | + |
1359 // | for | taskwait | * |
1360 // | for | flush | * |
1361 // | for | ordered | * (if construct is ordered) |
1362 // | for | atomic | * |
1363 // | for | target | * |
1364 // | for | teams | + |
1365 // +------------------+-----------------+------------------------------------+
1366 // | master | parallel | * |
1367 // | master | for | + |
1368 // | master | for simd | + |
1369 // | master | master | * |
1370 // | master | critical | * |
1371 // | master | simd | * |
1372 // | master | sections | + |
1373 // | master | section | + |
1374 // | master | single | + |
1375 // | master | parallel for | * |
1376 // | master |parallel for simd| * |
1377 // | master |parallel sections| * |
1378 // | master | task | * |
1379 // | master | taskyield | * |
1380 // | master | barrier | + |
1381 // | master | taskwait | * |
1382 // | master | flush | * |
1383 // | master | ordered | + |
1384 // | master | atomic | * |
1385 // | master | target | * |
1386 // | master | teams | + |
1387 // +------------------+-----------------+------------------------------------+
1388 // | critical | parallel | * |
1389 // | critical | for | + |
1390 // | critical | for simd | + |
1391 // | critical | master | * |
1392 // | critical | critical | * (should have different names) |
1393 // | critical | simd | * |
1394 // | critical | sections | + |
1395 // | critical | section | + |
1396 // | critical | single | + |
1397 // | critical | parallel for | * |
1398 // | critical |parallel for simd| * |
1399 // | critical |parallel sections| * |
1400 // | critical | task | * |
1401 // | critical | taskyield | * |
1402 // | critical | barrier | + |
1403 // | critical | taskwait | * |
1404 // | critical | ordered | + |
1405 // | critical | atomic | * |
1406 // | critical | target | * |
1407 // | critical | teams | + |
1408 // +------------------+-----------------+------------------------------------+
1409 // | simd | parallel | |
1411 // | simd | for simd | |
1412 // | simd | master | |
1413 // | simd | critical | |
1414 // | simd | simd | |
1415 // | simd | sections | |
1416 // | simd | section | |
1417 // | simd | single | |
1418 // | simd | parallel for | |
1419 // | simd |parallel for simd| |
1420 // | simd |parallel sections| |
1421 // | simd | task | |
1422 // | simd | taskyield | |
1423 // | simd | barrier | |
1424 // | simd | taskwait | |
1425 // | simd | flush | |
1426 // | simd | ordered | |
1427 // | simd | atomic | |
1428 // | simd | target | |
1429 // | simd | teams | |
1430 // +------------------+-----------------+------------------------------------+
1431 // | for simd | parallel | |
1432 // | for simd | for | |
1433 // | for simd | for simd | |
1434 // | for simd | master | |
1435 // | for simd | critical | |
1436 // | for simd | simd | |
1437 // | for simd | sections | |
1438 // | for simd | section | |
1439 // | for simd | single | |
1440 // | for simd | parallel for | |
1441 // | for simd |parallel for simd| |
1442 // | for simd |parallel sections| |
1443 // | for simd | task | |
1444 // | for simd | taskyield | |
1445 // | for simd | barrier | |
1446 // | for simd | taskwait | |
1447 // | for simd | flush | |
1448 // | for simd | ordered | |
1449 // | for simd | atomic | |
1450 // | for simd | target | |
1451 // | for simd | teams | |
1452 // +------------------+-----------------+------------------------------------+
1453 // | parallel for simd| parallel | |
1454 // | parallel for simd| for | |
1455 // | parallel for simd| for simd | |
1456 // | parallel for simd| master | |
1457 // | parallel for simd| critical | |
1458 // | parallel for simd| simd | |
1459 // | parallel for simd| sections | |
1460 // | parallel for simd| section | |
1461 // | parallel for simd| single | |
1462 // | parallel for simd| parallel for | |
1463 // | parallel for simd|parallel for simd| |
1464 // | parallel for simd|parallel sections| |
1465 // | parallel for simd| task | |
1466 // | parallel for simd| taskyield | |
1467 // | parallel for simd| barrier | |
1468 // | parallel for simd| taskwait | |
1469 // | parallel for simd| flush | |
1470 // | parallel for simd| ordered | |
1471 // | parallel for simd| atomic | |
1472 // | parallel for simd| target | |
1473 // | parallel for simd| teams | |
1474 // +------------------+-----------------+------------------------------------+
1475 // | sections | parallel | * |
1476 // | sections | for | + |
1477 // | sections | for simd | + |
1478 // | sections | master | + |
1479 // | sections | critical | * |
1480 // | sections | simd | * |
1481 // | sections | sections | + |
1482 // | sections | section | * |
1483 // | sections | single | + |
1484 // | sections | parallel for | * |
1485 // | sections |parallel for simd| * |
1486 // | sections |parallel sections| * |
1487 // | sections | task | * |
1488 // | sections | taskyield | * |
1489 // | sections | barrier | + |
1490 // | sections | taskwait | * |
1491 // | sections | flush | * |
1492 // | sections | ordered | + |
1493 // | sections | atomic | * |
1494 // | sections | target | * |
1495 // | sections | teams | + |
1496 // +------------------+-----------------+------------------------------------+
1497 // | section | parallel | * |
1498 // | section | for | + |
1499 // | section | for simd | + |
1500 // | section | master | + |
1501 // | section | critical | * |
1502 // | section | simd | * |
1503 // | section | sections | + |
1504 // | section | section | + |
1505 // | section | single | + |
1506 // | section | parallel for | * |
1507 // | section |parallel for simd| * |
1508 // | section |parallel sections| * |
1509 // | section | task | * |
1510 // | section | taskyield | * |
1511 // | section | barrier | + |
1512 // | section | taskwait | * |
1513 // | section | flush | * |
1514 // | section | ordered | + |
1515 // | section | atomic | * |
1516 // | section | target | * |
1517 // | section | teams | + |
1518 // +------------------+-----------------+------------------------------------+
1519 // | single | parallel | * |
1520 // | single | for | + |
1521 // | single | for simd | + |
1522 // | single | master | + |
1523 // | single | critical | * |
1524 // | single | simd | * |
1525 // | single | sections | + |
1526 // | single | section | + |
1527 // | single | single | + |
1528 // | single | parallel for | * |
1529 // | single |parallel for simd| * |
1530 // | single |parallel sections| * |
1531 // | single | task | * |
1532 // | single | taskyield | * |
1533 // | single | barrier | + |
1534 // | single | taskwait | * |
1535 // | single | flush | * |
1536 // | single | ordered | + |
1537 // | single | atomic | * |
1538 // | single | target | * |
1539 // | single | teams | + |
1540 // +------------------+-----------------+------------------------------------+
1541 // | parallel for | parallel | * |
1542 // | parallel for | for | + |
1543 // | parallel for | for simd | + |
1544 // | parallel for | master | + |
1545 // | parallel for | critical | * |
1546 // | parallel for | simd | * |
1547 // | parallel for | sections | + |
1548 // | parallel for | section | + |
1549 // | parallel for | single | + |
1550 // | parallel for | parallel for | * |
1551 // | parallel for |parallel for simd| * |
1552 // | parallel for |parallel sections| * |
1553 // | parallel for | task | * |
1554 // | parallel for | taskyield | * |
1555 // | parallel for | barrier | + |
1556 // | parallel for | taskwait | * |
1557 // | parallel for | flush | * |
1558 // | parallel for | ordered | * (if construct is ordered) |
1559 // | parallel for | atomic | * |
1560 // | parallel for | target | * |
1561 // | parallel for | teams | + |
1562 // +------------------+-----------------+------------------------------------+
1563 // | parallel sections| parallel | * |
1564 // | parallel sections| for | + |
1565 // | parallel sections| for simd | + |
1566 // | parallel sections| master | + |
1567 // | parallel sections| critical | + |
1568 // | parallel sections| simd | * |
1569 // | parallel sections| sections | + |
1570 // | parallel sections| section | * |
1571 // | parallel sections| single | + |
1572 // | parallel sections| parallel for | * |
1573 // | parallel sections|parallel for simd| * |
1574 // | parallel sections|parallel sections| * |
1575 // | parallel sections| task | * |
1576 // | parallel sections| taskyield | * |
1577 // | parallel sections| barrier | + |
1578 // | parallel sections| taskwait | * |
1579 // | parallel sections| flush | * |
1580 // | parallel sections| ordered | + |
1581 // | parallel sections| atomic | * |
1582 // | parallel sections| target | * |
1583 // | parallel sections| teams | + |
1584 // +------------------+-----------------+------------------------------------+
1585 // | task | parallel | * |
1586 // | task | for | + |
1587 // | task | for simd | + |
1588 // | task | master | + |
1589 // | task | critical | * |
1590 // | task | simd | * |
1591 // | task | sections | + |
1592 // | task | section | + |
1593 // | task | single | + |
1594 // | task | parallel for | * |
1595 // | task |parallel for simd| * |
1596 // | task |parallel sections| * |
1597 // | task | task | * |
1598 // | task | taskyield | * |
1599 // | task | barrier | + |
1600 // | task | taskwait | * |
1601 // | task | flush | * |
1602 // | task | ordered | + |
1603 // | task | atomic | * |
1604 // | task | target | * |
1605 // | task | teams | + |
1606 // +------------------+-----------------+------------------------------------+
1607 // | ordered | parallel | * |
1608 // | ordered | for | + |
1609 // | ordered | for simd | + |
1610 // | ordered | master | * |
1611 // | ordered | critical | * |
1612 // | ordered | simd | * |
1613 // | ordered | sections | + |
1614 // | ordered | section | + |
1615 // | ordered | single | + |
1616 // | ordered | parallel for | * |
1617 // | ordered |parallel for simd| * |
1618 // | ordered |parallel sections| * |
1619 // | ordered | task | * |
1620 // | ordered | taskyield | * |
1621 // | ordered | barrier | + |
1622 // | ordered | taskwait | * |
1623 // | ordered | flush | * |
1624 // | ordered | ordered | + |
1625 // | ordered | atomic | * |
1626 // | ordered | target | * |
1627 // | ordered | teams | + |
1628 // +------------------+-----------------+------------------------------------+
1629 // | atomic | parallel | |
1630 // | atomic | for | |
1631 // | atomic | for simd | |
1632 // | atomic | master | |
1633 // | atomic | critical | |
1634 // | atomic | simd | |
1635 // | atomic | sections | |
1636 // | atomic | section | |
1637 // | atomic | single | |
1638 // | atomic | parallel for | |
1639 // | atomic |parallel for simd| |
1640 // | atomic |parallel sections| |
1641 // | atomic | task | |
1642 // | atomic | taskyield | |
1643 // | atomic | barrier | |
1644 // | atomic | taskwait | |
1645 // | atomic | flush | |
1646 // | atomic | ordered | |
1647 // | atomic | atomic | |
1648 // | atomic | target | |
1649 // | atomic | teams | |
1650 // +------------------+-----------------+------------------------------------+
1651 // | target | parallel | * |
1652 // | target | for | * |
1653 // | target | for simd | * |
1654 // | target | master | * |
1655 // | target | critical | * |
1656 // | target | simd | * |
1657 // | target | sections | * |
1658 // | target | section | * |
1659 // | target | single | * |
1660 // | target | parallel for | * |
1661 // | target |parallel for simd| * |
1662 // | target |parallel sections| * |
1663 // | target | task | * |
1664 // | target | taskyield | * |
1665 // | target | barrier | * |
1666 // | target | taskwait | * |
1667 // | target | flush | * |
1668 // | target | ordered | * |
1669 // | target | atomic | * |
1670 // | target | target | * |
1671 // | target | teams | * |
1672 // +------------------+-----------------+------------------------------------+
1673 // | teams | parallel | * |
1674 // | teams | for | + |
1675 // | teams | for simd | + |
1676 // | teams | master | + |
1677 // | teams | critical | + |
1678 // | teams | simd | + |
1679 // | teams | sections | + |
1680 // | teams | section | + |
1681 // | teams | single | + |
1682 // | teams | parallel for | * |
1683 // | teams |parallel for simd| * |
1684 // | teams |parallel sections| * |
1685 // | teams | task | + |
1686 // | teams | taskyield | + |
1687 // | teams | barrier | + |
1688 // | teams | taskwait | + |
1689 // | teams | flush | + |
1690 // | teams | ordered | + |
1691 // | teams | atomic | + |
1692 // | teams | target | + |
1693 // | teams | teams | + |
1694 // +------------------+-----------------+------------------------------------+
1695 if (Stack->getCurScope()) {
1696 auto ParentRegion = Stack->getParentDirective();
1697 bool NestingProhibited = false;
1698 bool CloseNesting = true;
1701 ShouldBeInParallelRegion,
1702 ShouldBeInOrderedRegion,
1703 ShouldBeInTargetRegion
1704 } Recommend = NoRecommend;
1705 if (isOpenMPSimdDirective(ParentRegion)) {
1706 // OpenMP [2.16, Nesting of Regions]
1707 // OpenMP constructs may not be nested inside a simd region.
1708 SemaRef.Diag(StartLoc, diag::err_omp_prohibited_region_simd);
1711 if (ParentRegion == OMPD_atomic) {
1712 // OpenMP [2.16, Nesting of Regions]
1713 // OpenMP constructs may not be nested inside an atomic region.
1714 SemaRef.Diag(StartLoc, diag::err_omp_prohibited_region_atomic);
1717 if (CurrentRegion == OMPD_section) {
1718 // OpenMP [2.7.2, sections Construct, Restrictions]
1719 // Orphaned section directives are prohibited. That is, the section
1720 // directives must appear within the sections construct and must not be
1721 // encountered elsewhere in the sections region.
1722 if (ParentRegion != OMPD_sections &&
1723 ParentRegion != OMPD_parallel_sections) {
1724 SemaRef.Diag(StartLoc, diag::err_omp_orphaned_section_directive)
1725 << (ParentRegion != OMPD_unknown)
1726 << getOpenMPDirectiveName(ParentRegion);
1731 // Allow some constructs to be orphaned (they could be used in functions,
1732 // called from OpenMP regions with the required preconditions).
1733 if (ParentRegion == OMPD_unknown)
1735 if (CurrentRegion == OMPD_master) {
1736 // OpenMP [2.16, Nesting of Regions]
1737 // A master region may not be closely nested inside a worksharing,
1738 // atomic, or explicit task region.
1739 NestingProhibited = isOpenMPWorksharingDirective(ParentRegion) ||
1740 ParentRegion == OMPD_task;
1741 } else if (CurrentRegion == OMPD_critical && CurrentName.getName()) {
1742 // OpenMP [2.16, Nesting of Regions]
1743 // A critical region may not be nested (closely or otherwise) inside a
1744 // critical region with the same name. Note that this restriction is not
1745 // sufficient to prevent deadlock.
1746 SourceLocation PreviousCriticalLoc;
1748 Stack->hasDirective([CurrentName, &PreviousCriticalLoc](
1749 OpenMPDirectiveKind K,
1750 const DeclarationNameInfo &DNI,
1753 if (K == OMPD_critical &&
1754 DNI.getName() == CurrentName.getName()) {
1755 PreviousCriticalLoc = Loc;
1760 false /* skip top directive */);
1762 SemaRef.Diag(StartLoc,
1763 diag::err_omp_prohibited_region_critical_same_name)
1764 << CurrentName.getName();
1765 if (PreviousCriticalLoc.isValid())
1766 SemaRef.Diag(PreviousCriticalLoc,
1767 diag::note_omp_previous_critical_region);
1770 } else if (CurrentRegion == OMPD_barrier) {
1771 // OpenMP [2.16, Nesting of Regions]
1772 // A barrier region may not be closely nested inside a worksharing,
1773 // explicit task, critical, ordered, atomic, or master region.
1775 isOpenMPWorksharingDirective(ParentRegion) ||
1776 ParentRegion == OMPD_task || ParentRegion == OMPD_master ||
1777 ParentRegion == OMPD_critical || ParentRegion == OMPD_ordered;
1778 } else if (isOpenMPWorksharingDirective(CurrentRegion) &&
1779 !isOpenMPParallelDirective(CurrentRegion)) {
1780 // OpenMP [2.16, Nesting of Regions]
1781 // A worksharing region may not be closely nested inside a worksharing,
1782 // explicit task, critical, ordered, atomic, or master region.
1784 isOpenMPWorksharingDirective(ParentRegion) ||
1785 ParentRegion == OMPD_task || ParentRegion == OMPD_master ||
1786 ParentRegion == OMPD_critical || ParentRegion == OMPD_ordered;
1787 Recommend = ShouldBeInParallelRegion;
1788 } else if (CurrentRegion == OMPD_ordered) {
1789 // OpenMP [2.16, Nesting of Regions]
1790 // An ordered region may not be closely nested inside a critical,
1791 // atomic, or explicit task region.
1792 // An ordered region must be closely nested inside a loop region (or
1793 // parallel loop region) with an ordered clause.
1794 NestingProhibited = ParentRegion == OMPD_critical ||
1795 ParentRegion == OMPD_task ||
1796 !Stack->isParentOrderedRegion();
1797 Recommend = ShouldBeInOrderedRegion;
1798 } else if (isOpenMPTeamsDirective(CurrentRegion)) {
1799 // OpenMP [2.16, Nesting of Regions]
1800 // If specified, a teams construct must be contained within a target
1802 NestingProhibited = ParentRegion != OMPD_target;
1803 Recommend = ShouldBeInTargetRegion;
1804 Stack->setParentTeamsRegionLoc(Stack->getConstructLoc());
1806 if (!NestingProhibited && isOpenMPTeamsDirective(ParentRegion)) {
1807 // OpenMP [2.16, Nesting of Regions]
1808 // distribute, parallel, parallel sections, parallel workshare, and the
1809 // parallel loop and parallel loop SIMD constructs are the only OpenMP
1810 // constructs that can be closely nested in the teams region.
1811 // TODO: add distribute directive.
1812 NestingProhibited = !isOpenMPParallelDirective(CurrentRegion);
1813 Recommend = ShouldBeInParallelRegion;
1815 if (NestingProhibited) {
1816 SemaRef.Diag(StartLoc, diag::err_omp_prohibited_region)
1817 << CloseNesting << getOpenMPDirectiveName(ParentRegion) << Recommend
1818 << getOpenMPDirectiveName(CurrentRegion);
1825 StmtResult Sema::ActOnOpenMPExecutableDirective(OpenMPDirectiveKind Kind,
1826 const DeclarationNameInfo &DirName,
1827 ArrayRef<OMPClause *> Clauses,
1829 SourceLocation StartLoc,
1830 SourceLocation EndLoc) {
1831 StmtResult Res = StmtError();
1832 if (CheckNestingOfRegions(*this, DSAStack, Kind, DirName, StartLoc))
1835 llvm::SmallVector<OMPClause *, 8> ClausesWithImplicit;
1836 llvm::DenseMap<VarDecl *, Expr *> VarsWithInheritedDSA;
1837 bool ErrorFound = false;
1838 ClausesWithImplicit.append(Clauses.begin(), Clauses.end());
1840 assert(isa<CapturedStmt>(AStmt) && "Captured statement expected");
1842 // Check default data sharing attributes for referenced variables.
1843 DSAAttrChecker DSAChecker(DSAStack, *this, cast<CapturedStmt>(AStmt));
1844 DSAChecker.Visit(cast<CapturedStmt>(AStmt)->getCapturedStmt());
1845 if (DSAChecker.isErrorFound())
1847 // Generate list of implicitly defined firstprivate variables.
1848 VarsWithInheritedDSA = DSAChecker.getVarsWithInheritedDSA();
1850 if (!DSAChecker.getImplicitFirstprivate().empty()) {
1851 if (OMPClause *Implicit = ActOnOpenMPFirstprivateClause(
1852 DSAChecker.getImplicitFirstprivate(), SourceLocation(),
1853 SourceLocation(), SourceLocation())) {
1854 ClausesWithImplicit.push_back(Implicit);
1855 ErrorFound = cast<OMPFirstprivateClause>(Implicit)->varlist_size() !=
1856 DSAChecker.getImplicitFirstprivate().size();
1864 Res = ActOnOpenMPParallelDirective(ClausesWithImplicit, AStmt, StartLoc,
1868 Res = ActOnOpenMPSimdDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc,
1869 VarsWithInheritedDSA);
1872 Res = ActOnOpenMPForDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc,
1873 VarsWithInheritedDSA);
1876 Res = ActOnOpenMPForSimdDirective(ClausesWithImplicit, AStmt, StartLoc,
1877 EndLoc, VarsWithInheritedDSA);
1880 Res = ActOnOpenMPSectionsDirective(ClausesWithImplicit, AStmt, StartLoc,
1884 assert(ClausesWithImplicit.empty() &&
1885 "No clauses are allowed for 'omp section' directive");
1886 Res = ActOnOpenMPSectionDirective(AStmt, StartLoc, EndLoc);
1889 Res = ActOnOpenMPSingleDirective(ClausesWithImplicit, AStmt, StartLoc,
1893 assert(ClausesWithImplicit.empty() &&
1894 "No clauses are allowed for 'omp master' directive");
1895 Res = ActOnOpenMPMasterDirective(AStmt, StartLoc, EndLoc);
1898 assert(ClausesWithImplicit.empty() &&
1899 "No clauses are allowed for 'omp critical' directive");
1900 Res = ActOnOpenMPCriticalDirective(DirName, AStmt, StartLoc, EndLoc);
1902 case OMPD_parallel_for:
1903 Res = ActOnOpenMPParallelForDirective(ClausesWithImplicit, AStmt, StartLoc,
1904 EndLoc, VarsWithInheritedDSA);
1906 case OMPD_parallel_for_simd:
1907 Res = ActOnOpenMPParallelForSimdDirective(
1908 ClausesWithImplicit, AStmt, StartLoc, EndLoc, VarsWithInheritedDSA);
1910 case OMPD_parallel_sections:
1911 Res = ActOnOpenMPParallelSectionsDirective(ClausesWithImplicit, AStmt,
1916 ActOnOpenMPTaskDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc);
1918 case OMPD_taskyield:
1919 assert(ClausesWithImplicit.empty() &&
1920 "No clauses are allowed for 'omp taskyield' directive");
1921 assert(AStmt == nullptr &&
1922 "No associated statement allowed for 'omp taskyield' directive");
1923 Res = ActOnOpenMPTaskyieldDirective(StartLoc, EndLoc);
1926 assert(ClausesWithImplicit.empty() &&
1927 "No clauses are allowed for 'omp barrier' directive");
1928 assert(AStmt == nullptr &&
1929 "No associated statement allowed for 'omp barrier' directive");
1930 Res = ActOnOpenMPBarrierDirective(StartLoc, EndLoc);
1933 assert(ClausesWithImplicit.empty() &&
1934 "No clauses are allowed for 'omp taskwait' directive");
1935 assert(AStmt == nullptr &&
1936 "No associated statement allowed for 'omp taskwait' directive");
1937 Res = ActOnOpenMPTaskwaitDirective(StartLoc, EndLoc);
1940 assert(AStmt == nullptr &&
1941 "No associated statement allowed for 'omp flush' directive");
1942 Res = ActOnOpenMPFlushDirective(ClausesWithImplicit, StartLoc, EndLoc);
1945 assert(ClausesWithImplicit.empty() &&
1946 "No clauses are allowed for 'omp ordered' directive");
1947 Res = ActOnOpenMPOrderedDirective(AStmt, StartLoc, EndLoc);
1950 Res = ActOnOpenMPAtomicDirective(ClausesWithImplicit, AStmt, StartLoc,
1955 ActOnOpenMPTeamsDirective(ClausesWithImplicit, AStmt, StartLoc, EndLoc);
1958 Res = ActOnOpenMPTargetDirective(ClausesWithImplicit, AStmt, StartLoc,
1961 case OMPD_threadprivate:
1962 llvm_unreachable("OpenMP Directive is not allowed");
1964 llvm_unreachable("Unknown OpenMP directive");
1967 for (auto P : VarsWithInheritedDSA) {
1968 Diag(P.second->getExprLoc(), diag::err_omp_no_dsa_for_variable)
1969 << P.first << P.second->getSourceRange();
1971 if (!VarsWithInheritedDSA.empty())
1979 StmtResult Sema::ActOnOpenMPParallelDirective(ArrayRef<OMPClause *> Clauses,
1981 SourceLocation StartLoc,
1982 SourceLocation EndLoc) {
1983 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
1984 CapturedStmt *CS = cast<CapturedStmt>(AStmt);
1985 // 1.2.2 OpenMP Language Terminology
1986 // Structured block - An executable statement with a single entry at the
1987 // top and a single exit at the bottom.
1988 // The point of exit cannot be a branch out of the structured block.
1989 // longjmp() and throw() must not violate the entry/exit criteria.
1990 CS->getCapturedDecl()->setNothrow();
1992 getCurFunction()->setHasBranchProtectedScope();
1994 return OMPParallelDirective::Create(Context, StartLoc, EndLoc, Clauses,
1999 /// \brief Helper class for checking canonical form of the OpenMP loops and
2000 /// extracting iteration space of each loop in the loop nest, that will be used
2001 /// for IR generation.
2002 class OpenMPIterationSpaceChecker {
2003 /// \brief Reference to Sema.
2005 /// \brief A location for diagnostics (when there is no some better location).
2006 SourceLocation DefaultLoc;
2007 /// \brief A location for diagnostics (when increment is not compatible).
2008 SourceLocation ConditionLoc;
2009 /// \brief A source location for referring to loop init later.
2010 SourceRange InitSrcRange;
2011 /// \brief A source location for referring to condition later.
2012 SourceRange ConditionSrcRange;
2013 /// \brief A source location for referring to increment later.
2014 SourceRange IncrementSrcRange;
2015 /// \brief Loop variable.
2017 /// \brief Reference to loop variable.
2018 DeclRefExpr *VarRef;
2019 /// \brief Lower bound (initializer for the var).
2021 /// \brief Upper bound.
2023 /// \brief Loop step (increment).
2025 /// \brief This flag is true when condition is one of:
2031 /// \brief This flag is true when condition is strict ( < or > ).
2032 bool TestIsStrictOp;
2033 /// \brief This flag is true when step is subtracted on each iteration.
2037 OpenMPIterationSpaceChecker(Sema &SemaRef, SourceLocation DefaultLoc)
2038 : SemaRef(SemaRef), DefaultLoc(DefaultLoc), ConditionLoc(DefaultLoc),
2039 InitSrcRange(SourceRange()), ConditionSrcRange(SourceRange()),
2040 IncrementSrcRange(SourceRange()), Var(nullptr), VarRef(nullptr),
2041 LB(nullptr), UB(nullptr), Step(nullptr), TestIsLessOp(false),
2042 TestIsStrictOp(false), SubtractStep(false) {}
2043 /// \brief Check init-expr for canonical loop form and save loop counter
2044 /// variable - #Var and its initialization value - #LB.
2045 bool CheckInit(Stmt *S, bool EmitDiags = true);
2046 /// \brief Check test-expr for canonical form, save upper-bound (#UB), flags
2047 /// for less/greater and for strict/non-strict comparison.
2048 bool CheckCond(Expr *S);
2049 /// \brief Check incr-expr for canonical loop form and return true if it
2050 /// does not conform, otherwise save loop step (#Step).
2051 bool CheckInc(Expr *S);
2052 /// \brief Return the loop counter variable.
2053 VarDecl *GetLoopVar() const { return Var; }
2054 /// \brief Return the reference expression to loop counter variable.
2055 DeclRefExpr *GetLoopVarRefExpr() const { return VarRef; }
2056 /// \brief Source range of the loop init.
2057 SourceRange GetInitSrcRange() const { return InitSrcRange; }
2058 /// \brief Source range of the loop condition.
2059 SourceRange GetConditionSrcRange() const { return ConditionSrcRange; }
2060 /// \brief Source range of the loop increment.
2061 SourceRange GetIncrementSrcRange() const { return IncrementSrcRange; }
2062 /// \brief True if the step should be subtracted.
2063 bool ShouldSubtractStep() const { return SubtractStep; }
2064 /// \brief Build the expression to calculate the number of iterations.
2065 Expr *BuildNumIterations(Scope *S, const bool LimitedType) const;
2066 /// \brief Build the precondition expression for the loops.
2067 Expr *BuildPreCond(Scope *S, Expr *Cond) const;
2068 /// \brief Build reference expression to the counter be used for codegen.
2069 Expr *BuildCounterVar() const;
2070 /// \brief Build initization of the counter be used for codegen.
2071 Expr *BuildCounterInit() const;
2072 /// \brief Build step of the counter be used for codegen.
2073 Expr *BuildCounterStep() const;
2074 /// \brief Return true if any expression is dependent.
2075 bool Dependent() const;
2078 /// \brief Check the right-hand side of an assignment in the increment
2080 bool CheckIncRHS(Expr *RHS);
2081 /// \brief Helper to set loop counter variable and its initializer.
2082 bool SetVarAndLB(VarDecl *NewVar, DeclRefExpr *NewVarRefExpr, Expr *NewLB);
2083 /// \brief Helper to set upper bound.
2084 bool SetUB(Expr *NewUB, bool LessOp, bool StrictOp, const SourceRange &SR,
2085 const SourceLocation &SL);
2086 /// \brief Helper to set loop increment.
2087 bool SetStep(Expr *NewStep, bool Subtract);
2090 bool OpenMPIterationSpaceChecker::Dependent() const {
2092 assert(!LB && !UB && !Step);
2095 return Var->getType()->isDependentType() || (LB && LB->isValueDependent()) ||
2096 (UB && UB->isValueDependent()) || (Step && Step->isValueDependent());
2099 bool OpenMPIterationSpaceChecker::SetVarAndLB(VarDecl *NewVar,
2100 DeclRefExpr *NewVarRefExpr,
2102 // State consistency checking to ensure correct usage.
2103 assert(Var == nullptr && LB == nullptr && VarRef == nullptr &&
2104 UB == nullptr && Step == nullptr && !TestIsLessOp && !TestIsStrictOp);
2105 if (!NewVar || !NewLB)
2108 VarRef = NewVarRefExpr;
2113 bool OpenMPIterationSpaceChecker::SetUB(Expr *NewUB, bool LessOp, bool StrictOp,
2114 const SourceRange &SR,
2115 const SourceLocation &SL) {
2116 // State consistency checking to ensure correct usage.
2117 assert(Var != nullptr && LB != nullptr && UB == nullptr && Step == nullptr &&
2118 !TestIsLessOp && !TestIsStrictOp);
2122 TestIsLessOp = LessOp;
2123 TestIsStrictOp = StrictOp;
2124 ConditionSrcRange = SR;
2129 bool OpenMPIterationSpaceChecker::SetStep(Expr *NewStep, bool Subtract) {
2130 // State consistency checking to ensure correct usage.
2131 assert(Var != nullptr && LB != nullptr && Step == nullptr);
2134 if (!NewStep->isValueDependent()) {
2135 // Check that the step is integer expression.
2136 SourceLocation StepLoc = NewStep->getLocStart();
2138 SemaRef.PerformOpenMPImplicitIntegerConversion(StepLoc, NewStep);
2139 if (Val.isInvalid())
2141 NewStep = Val.get();
2143 // OpenMP [2.6, Canonical Loop Form, Restrictions]
2144 // If test-expr is of form var relational-op b and relational-op is < or
2145 // <= then incr-expr must cause var to increase on each iteration of the
2146 // loop. If test-expr is of form var relational-op b and relational-op is
2147 // > or >= then incr-expr must cause var to decrease on each iteration of
2149 // If test-expr is of form b relational-op var and relational-op is < or
2150 // <= then incr-expr must cause var to decrease on each iteration of the
2151 // loop. If test-expr is of form b relational-op var and relational-op is
2152 // > or >= then incr-expr must cause var to increase on each iteration of
2154 llvm::APSInt Result;
2155 bool IsConstant = NewStep->isIntegerConstantExpr(Result, SemaRef.Context);
2156 bool IsUnsigned = !NewStep->getType()->hasSignedIntegerRepresentation();
2158 IsConstant && Result.isSigned() && (Subtract != Result.isNegative());
2160 IsConstant && Result.isSigned() && (Subtract == Result.isNegative());
2161 bool IsConstZero = IsConstant && !Result.getBoolValue();
2162 if (UB && (IsConstZero ||
2163 (TestIsLessOp ? (IsConstNeg || (IsUnsigned && Subtract))
2164 : (IsConstPos || (IsUnsigned && !Subtract))))) {
2165 SemaRef.Diag(NewStep->getExprLoc(),
2166 diag::err_omp_loop_incr_not_compatible)
2167 << Var << TestIsLessOp << NewStep->getSourceRange();
2168 SemaRef.Diag(ConditionLoc,
2169 diag::note_omp_loop_cond_requres_compatible_incr)
2170 << TestIsLessOp << ConditionSrcRange;
2173 if (TestIsLessOp == Subtract) {
2174 NewStep = SemaRef.CreateBuiltinUnaryOp(NewStep->getExprLoc(), UO_Minus,
2176 Subtract = !Subtract;
2181 SubtractStep = Subtract;
2185 bool OpenMPIterationSpaceChecker::CheckInit(Stmt *S, bool EmitDiags) {
2186 // Check init-expr for canonical loop form and save loop counter
2187 // variable - #Var and its initialization value - #LB.
2188 // OpenMP [2.6] Canonical loop form. init-expr may be one of the following:
2190 // integer-type var = lb
2191 // random-access-iterator-type var = lb
2192 // pointer-type var = lb
2196 SemaRef.Diag(DefaultLoc, diag::err_omp_loop_not_canonical_init);
2200 InitSrcRange = S->getSourceRange();
2201 if (Expr *E = dyn_cast<Expr>(S))
2202 S = E->IgnoreParens();
2203 if (auto BO = dyn_cast<BinaryOperator>(S)) {
2204 if (BO->getOpcode() == BO_Assign)
2205 if (auto DRE = dyn_cast<DeclRefExpr>(BO->getLHS()->IgnoreParens()))
2206 return SetVarAndLB(dyn_cast<VarDecl>(DRE->getDecl()), DRE,
2208 } else if (auto DS = dyn_cast<DeclStmt>(S)) {
2209 if (DS->isSingleDecl()) {
2210 if (auto Var = dyn_cast_or_null<VarDecl>(DS->getSingleDecl())) {
2211 if (Var->hasInit()) {
2212 // Accept non-canonical init form here but emit ext. warning.
2213 if (Var->getInitStyle() != VarDecl::CInit && EmitDiags)
2214 SemaRef.Diag(S->getLocStart(),
2215 diag::ext_omp_loop_not_canonical_init)
2216 << S->getSourceRange();
2217 return SetVarAndLB(Var, nullptr, Var->getInit());
2221 } else if (auto CE = dyn_cast<CXXOperatorCallExpr>(S))
2222 if (CE->getOperator() == OO_Equal)
2223 if (auto DRE = dyn_cast<DeclRefExpr>(CE->getArg(0)))
2224 return SetVarAndLB(dyn_cast<VarDecl>(DRE->getDecl()), DRE,
2228 SemaRef.Diag(S->getLocStart(), diag::err_omp_loop_not_canonical_init)
2229 << S->getSourceRange();
2234 /// \brief Ignore parenthesizes, implicit casts, copy constructor and return the
2235 /// variable (which may be the loop variable) if possible.
2236 static const VarDecl *GetInitVarDecl(const Expr *E) {
2239 E = E->IgnoreParenImpCasts();
2240 if (auto *CE = dyn_cast_or_null<CXXConstructExpr>(E))
2241 if (const CXXConstructorDecl *Ctor = CE->getConstructor())
2242 if (Ctor->isCopyConstructor() && CE->getNumArgs() == 1 &&
2243 CE->getArg(0) != nullptr)
2244 E = CE->getArg(0)->IgnoreParenImpCasts();
2245 auto DRE = dyn_cast_or_null<DeclRefExpr>(E);
2248 return dyn_cast<VarDecl>(DRE->getDecl());
2251 bool OpenMPIterationSpaceChecker::CheckCond(Expr *S) {
2252 // Check test-expr for canonical form, save upper-bound UB, flags for
2253 // less/greater and for strict/non-strict comparison.
2254 // OpenMP [2.6] Canonical loop form. Test-expr may be one of the following:
2255 // var relational-op b
2256 // b relational-op var
2259 SemaRef.Diag(DefaultLoc, diag::err_omp_loop_not_canonical_cond) << Var;
2262 S = S->IgnoreParenImpCasts();
2263 SourceLocation CondLoc = S->getLocStart();
2264 if (auto BO = dyn_cast<BinaryOperator>(S)) {
2265 if (BO->isRelationalOp()) {
2266 if (GetInitVarDecl(BO->getLHS()) == Var)
2267 return SetUB(BO->getRHS(),
2268 (BO->getOpcode() == BO_LT || BO->getOpcode() == BO_LE),
2269 (BO->getOpcode() == BO_LT || BO->getOpcode() == BO_GT),
2270 BO->getSourceRange(), BO->getOperatorLoc());
2271 if (GetInitVarDecl(BO->getRHS()) == Var)
2272 return SetUB(BO->getLHS(),
2273 (BO->getOpcode() == BO_GT || BO->getOpcode() == BO_GE),
2274 (BO->getOpcode() == BO_LT || BO->getOpcode() == BO_GT),
2275 BO->getSourceRange(), BO->getOperatorLoc());
2277 } else if (auto CE = dyn_cast<CXXOperatorCallExpr>(S)) {
2278 if (CE->getNumArgs() == 2) {
2279 auto Op = CE->getOperator();
2282 case OO_GreaterEqual:
2285 if (GetInitVarDecl(CE->getArg(0)) == Var)
2286 return SetUB(CE->getArg(1), Op == OO_Less || Op == OO_LessEqual,
2287 Op == OO_Less || Op == OO_Greater, CE->getSourceRange(),
2288 CE->getOperatorLoc());
2289 if (GetInitVarDecl(CE->getArg(1)) == Var)
2290 return SetUB(CE->getArg(0), Op == OO_Greater || Op == OO_GreaterEqual,
2291 Op == OO_Less || Op == OO_Greater, CE->getSourceRange(),
2292 CE->getOperatorLoc());
2299 SemaRef.Diag(CondLoc, diag::err_omp_loop_not_canonical_cond)
2300 << S->getSourceRange() << Var;
2304 bool OpenMPIterationSpaceChecker::CheckIncRHS(Expr *RHS) {
2305 // RHS of canonical loop form increment can be:
2310 RHS = RHS->IgnoreParenImpCasts();
2311 if (auto BO = dyn_cast<BinaryOperator>(RHS)) {
2312 if (BO->isAdditiveOp()) {
2313 bool IsAdd = BO->getOpcode() == BO_Add;
2314 if (GetInitVarDecl(BO->getLHS()) == Var)
2315 return SetStep(BO->getRHS(), !IsAdd);
2316 if (IsAdd && GetInitVarDecl(BO->getRHS()) == Var)
2317 return SetStep(BO->getLHS(), false);
2319 } else if (auto CE = dyn_cast<CXXOperatorCallExpr>(RHS)) {
2320 bool IsAdd = CE->getOperator() == OO_Plus;
2321 if ((IsAdd || CE->getOperator() == OO_Minus) && CE->getNumArgs() == 2) {
2322 if (GetInitVarDecl(CE->getArg(0)) == Var)
2323 return SetStep(CE->getArg(1), !IsAdd);
2324 if (IsAdd && GetInitVarDecl(CE->getArg(1)) == Var)
2325 return SetStep(CE->getArg(0), false);
2328 SemaRef.Diag(RHS->getLocStart(), diag::err_omp_loop_not_canonical_incr)
2329 << RHS->getSourceRange() << Var;
2333 bool OpenMPIterationSpaceChecker::CheckInc(Expr *S) {
2334 // Check incr-expr for canonical loop form and return true if it
2335 // does not conform.
2336 // OpenMP [2.6] Canonical loop form. Test-expr may be one of the following:
2348 SemaRef.Diag(DefaultLoc, diag::err_omp_loop_not_canonical_incr) << Var;
2351 IncrementSrcRange = S->getSourceRange();
2352 S = S->IgnoreParens();
2353 if (auto UO = dyn_cast<UnaryOperator>(S)) {
2354 if (UO->isIncrementDecrementOp() && GetInitVarDecl(UO->getSubExpr()) == Var)
2356 SemaRef.ActOnIntegerConstant(UO->getLocStart(),
2357 (UO->isDecrementOp() ? -1 : 1)).get(),
2359 } else if (auto BO = dyn_cast<BinaryOperator>(S)) {
2360 switch (BO->getOpcode()) {
2363 if (GetInitVarDecl(BO->getLHS()) == Var)
2364 return SetStep(BO->getRHS(), BO->getOpcode() == BO_SubAssign);
2367 if (GetInitVarDecl(BO->getLHS()) == Var)
2368 return CheckIncRHS(BO->getRHS());
2373 } else if (auto CE = dyn_cast<CXXOperatorCallExpr>(S)) {
2374 switch (CE->getOperator()) {
2377 if (GetInitVarDecl(CE->getArg(0)) == Var)
2379 SemaRef.ActOnIntegerConstant(
2381 ((CE->getOperator() == OO_MinusMinus) ? -1 : 1)).get(),
2386 if (GetInitVarDecl(CE->getArg(0)) == Var)
2387 return SetStep(CE->getArg(1), CE->getOperator() == OO_MinusEqual);
2390 if (GetInitVarDecl(CE->getArg(0)) == Var)
2391 return CheckIncRHS(CE->getArg(1));
2397 SemaRef.Diag(S->getLocStart(), diag::err_omp_loop_not_canonical_incr)
2398 << S->getSourceRange() << Var;
2402 /// \brief Build the expression to calculate the number of iterations.
2404 OpenMPIterationSpaceChecker::BuildNumIterations(Scope *S,
2405 const bool LimitedType) const {
2407 if (Var->getType()->isIntegerType() || Var->getType()->isPointerType() ||
2408 SemaRef.getLangOpts().CPlusPlus) {
2410 Expr *Upper = TestIsLessOp ? UB : LB;
2411 Expr *Lower = TestIsLessOp ? LB : UB;
2413 Diff = SemaRef.BuildBinOp(S, DefaultLoc, BO_Sub, Upper, Lower);
2415 if (!Diff.isUsable() && Var->getType()->getAsCXXRecordDecl()) {
2416 // BuildBinOp already emitted error, this one is to point user to upper
2417 // and lower bound, and to tell what is passed to 'operator-'.
2418 SemaRef.Diag(Upper->getLocStart(), diag::err_omp_loop_diff_cxx)
2419 << Upper->getSourceRange() << Lower->getSourceRange();
2424 if (!Diff.isUsable())
2427 // Upper - Lower [- 1]
2429 Diff = SemaRef.BuildBinOp(
2430 S, DefaultLoc, BO_Sub, Diff.get(),
2431 SemaRef.ActOnIntegerConstant(SourceLocation(), 1).get());
2432 if (!Diff.isUsable())
2435 // Upper - Lower [- 1] + Step
2436 Diff = SemaRef.BuildBinOp(S, DefaultLoc, BO_Add, Diff.get(),
2437 Step->IgnoreImplicit());
2438 if (!Diff.isUsable())
2441 // Parentheses (for dumping/debugging purposes only).
2442 Diff = SemaRef.ActOnParenExpr(DefaultLoc, DefaultLoc, Diff.get());
2443 if (!Diff.isUsable())
2446 // (Upper - Lower [- 1] + Step) / Step
2447 Diff = SemaRef.BuildBinOp(S, DefaultLoc, BO_Div, Diff.get(),
2448 Step->IgnoreImplicit());
2449 if (!Diff.isUsable())
2452 // OpenMP runtime requires 32-bit or 64-bit loop variables.
2454 auto &C = SemaRef.Context;
2455 QualType Type = Diff.get()->getType();
2456 unsigned NewSize = (C.getTypeSize(Type) > 32) ? 64 : 32;
2457 if (NewSize != C.getTypeSize(Type)) {
2458 if (NewSize < C.getTypeSize(Type)) {
2459 assert(NewSize == 64 && "incorrect loop var size");
2460 SemaRef.Diag(DefaultLoc, diag::warn_omp_loop_64_bit_var)
2461 << InitSrcRange << ConditionSrcRange;
2463 QualType NewType = C.getIntTypeForBitwidth(
2464 NewSize, Type->hasSignedIntegerRepresentation());
2465 Diff = SemaRef.PerformImplicitConversion(Diff.get(), NewType,
2466 Sema::AA_Converting, true);
2467 if (!Diff.isUsable())
2475 Expr *OpenMPIterationSpaceChecker::BuildPreCond(Scope *S, Expr *Cond) const {
2476 // Try to build LB <op> UB, where <op> is <, >, <=, or >=.
2477 bool Suppress = SemaRef.getDiagnostics().getSuppressAllDiagnostics();
2478 SemaRef.getDiagnostics().setSuppressAllDiagnostics(/*Val=*/true);
2479 auto CondExpr = SemaRef.BuildBinOp(
2480 S, DefaultLoc, TestIsLessOp ? (TestIsStrictOp ? BO_LT : BO_LE)
2481 : (TestIsStrictOp ? BO_GT : BO_GE),
2483 SemaRef.getDiagnostics().setSuppressAllDiagnostics(Suppress);
2484 // Otherwise use original loop conditon and evaluate it in runtime.
2485 return CondExpr.isUsable() ? CondExpr.get() : Cond;
2488 /// \brief Build reference expression to the counter be used for codegen.
2489 Expr *OpenMPIterationSpaceChecker::BuildCounterVar() const {
2490 return buildDeclRefExpr(SemaRef, Var, Var->getType(), DefaultLoc);
2493 /// \brief Build initization of the counter be used for codegen.
2494 Expr *OpenMPIterationSpaceChecker::BuildCounterInit() const { return LB; }
2496 /// \brief Build step of the counter be used for codegen.
2497 Expr *OpenMPIterationSpaceChecker::BuildCounterStep() const { return Step; }
2499 /// \brief Iteration space of a single for loop.
2500 struct LoopIterationSpace {
2501 /// \brief Condition of the loop.
2503 /// \brief This expression calculates the number of iterations in the loop.
2504 /// It is always possible to calculate it before starting the loop.
2505 Expr *NumIterations;
2506 /// \brief The loop counter variable.
2508 /// \brief This is initializer for the initial value of #CounterVar.
2510 /// \brief This is step for the #CounterVar used to generate its update:
2511 /// #CounterVar = #CounterInit + #CounterStep * CurrentIteration.
2513 /// \brief Should step be subtracted?
2515 /// \brief Source range of the loop init.
2516 SourceRange InitSrcRange;
2517 /// \brief Source range of the loop condition.
2518 SourceRange CondSrcRange;
2519 /// \brief Source range of the loop increment.
2520 SourceRange IncSrcRange;
2525 void Sema::ActOnOpenMPLoopInitialization(SourceLocation ForLoc, Stmt *Init) {
2526 assert(getLangOpts().OpenMP && "OpenMP is not active.");
2527 assert(Init && "Expected loop in canonical form.");
2528 unsigned CollapseIteration = DSAStack->getCollapseNumber();
2529 if (CollapseIteration > 0 &&
2530 isOpenMPLoopDirective(DSAStack->getCurrentDirective())) {
2531 OpenMPIterationSpaceChecker ISC(*this, ForLoc);
2532 if (!ISC.CheckInit(Init, /*EmitDiags=*/false)) {
2533 DSAStack->addLoopControlVariable(ISC.GetLoopVar());
2535 DSAStack->setCollapseNumber(CollapseIteration - 1);
2539 /// \brief Called on a for stmt to check and extract its iteration space
2540 /// for further processing (such as collapsing).
2541 static bool CheckOpenMPIterationSpace(
2542 OpenMPDirectiveKind DKind, Stmt *S, Sema &SemaRef, DSAStackTy &DSA,
2543 unsigned CurrentNestedLoopCount, unsigned NestedLoopCount,
2544 Expr *NestedLoopCountExpr,
2545 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA,
2546 LoopIterationSpace &ResultIterSpace) {
2547 // OpenMP [2.6, Canonical Loop Form]
2548 // for (init-expr; test-expr; incr-expr) structured-block
2549 auto For = dyn_cast_or_null<ForStmt>(S);
2551 SemaRef.Diag(S->getLocStart(), diag::err_omp_not_for)
2552 << (NestedLoopCountExpr != nullptr) << getOpenMPDirectiveName(DKind)
2553 << NestedLoopCount << (CurrentNestedLoopCount > 0)
2554 << CurrentNestedLoopCount;
2555 if (NestedLoopCount > 1)
2556 SemaRef.Diag(NestedLoopCountExpr->getExprLoc(),
2557 diag::note_omp_collapse_expr)
2558 << NestedLoopCountExpr->getSourceRange();
2561 assert(For->getBody());
2563 OpenMPIterationSpaceChecker ISC(SemaRef, For->getForLoc());
2566 auto Init = For->getInit();
2567 if (ISC.CheckInit(Init)) {
2571 bool HasErrors = false;
2573 // Check loop variable's type.
2574 auto Var = ISC.GetLoopVar();
2576 // OpenMP [2.6, Canonical Loop Form]
2577 // Var is one of the following:
2578 // A variable of signed or unsigned integer type.
2579 // For C++, a variable of a random access iterator type.
2580 // For C, a variable of a pointer type.
2581 auto VarType = Var->getType();
2582 if (!VarType->isDependentType() && !VarType->isIntegerType() &&
2583 !VarType->isPointerType() &&
2584 !(SemaRef.getLangOpts().CPlusPlus && VarType->isOverloadableType())) {
2585 SemaRef.Diag(Init->getLocStart(), diag::err_omp_loop_variable_type)
2586 << SemaRef.getLangOpts().CPlusPlus;
2590 // OpenMP, 2.14.1.1 Data-sharing Attribute Rules for Variables Referenced in a
2592 // The loop iteration variable(s) in the associated for-loop(s) of a for or
2593 // parallel for construct is (are) private.
2594 // The loop iteration variable in the associated for-loop of a simd construct
2595 // with just one associated for-loop is linear with a constant-linear-step
2596 // that is the increment of the associated for-loop.
2597 // Exclude loop var from the list of variables with implicitly defined data
2598 // sharing attributes.
2599 VarsWithImplicitDSA.erase(Var);
2601 // OpenMP [2.14.1.1, Data-sharing Attribute Rules for Variables Referenced in
2602 // a Construct, C/C++].
2603 // The loop iteration variable in the associated for-loop of a simd construct
2604 // with just one associated for-loop may be listed in a linear clause with a
2605 // constant-linear-step that is the increment of the associated for-loop.
2606 // The loop iteration variable(s) in the associated for-loop(s) of a for or
2607 // parallel for construct may be listed in a private or lastprivate clause.
2608 DSAStackTy::DSAVarData DVar = DSA.getTopDSA(Var, false);
2609 auto LoopVarRefExpr = ISC.GetLoopVarRefExpr();
2610 // If LoopVarRefExpr is nullptr it means the corresponding loop variable is
2611 // declared in the loop and it is predetermined as a private.
2612 auto PredeterminedCKind =
2613 isOpenMPSimdDirective(DKind)
2614 ? ((NestedLoopCount == 1) ? OMPC_linear : OMPC_lastprivate)
2616 if (((isOpenMPSimdDirective(DKind) && DVar.CKind != OMPC_unknown &&
2617 DVar.CKind != OMPC_threadprivate && DVar.CKind != PredeterminedCKind) ||
2618 (isOpenMPWorksharingDirective(DKind) && !isOpenMPSimdDirective(DKind) &&
2619 DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_private &&
2620 DVar.CKind != OMPC_lastprivate && DVar.CKind != OMPC_threadprivate)) &&
2621 ((DVar.CKind != OMPC_private && DVar.CKind != OMPC_threadprivate) ||
2622 DVar.RefExpr != nullptr)) {
2623 SemaRef.Diag(Init->getLocStart(), diag::err_omp_loop_var_dsa)
2624 << getOpenMPClauseName(DVar.CKind) << getOpenMPDirectiveName(DKind)
2625 << getOpenMPClauseName(PredeterminedCKind);
2626 if (DVar.RefExpr == nullptr)
2627 DVar.CKind = PredeterminedCKind;
2628 ReportOriginalDSA(SemaRef, &DSA, Var, DVar, /*IsLoopIterVar=*/true);
2630 } else if (LoopVarRefExpr != nullptr) {
2631 // Make the loop iteration variable private (for worksharing constructs),
2632 // linear (for simd directives with the only one associated loop) or
2633 // lastprivate (for simd directives with several collapsed loops).
2634 if (DVar.CKind == OMPC_unknown)
2635 DVar = DSA.hasDSA(Var, isOpenMPPrivate, MatchesAlways(),
2636 /*FromParent=*/false);
2637 DSA.addDSA(Var, LoopVarRefExpr, PredeterminedCKind);
2640 assert(isOpenMPLoopDirective(DKind) && "DSA for non-loop vars");
2643 HasErrors |= ISC.CheckCond(For->getCond());
2646 HasErrors |= ISC.CheckInc(For->getInc());
2648 if (ISC.Dependent() || SemaRef.CurContext->isDependentContext() || HasErrors)
2651 // Build the loop's iteration space representation.
2652 ResultIterSpace.PreCond = ISC.BuildPreCond(DSA.getCurScope(), For->getCond());
2653 ResultIterSpace.NumIterations = ISC.BuildNumIterations(
2654 DSA.getCurScope(), /* LimitedType */ isOpenMPWorksharingDirective(DKind));
2655 ResultIterSpace.CounterVar = ISC.BuildCounterVar();
2656 ResultIterSpace.CounterInit = ISC.BuildCounterInit();
2657 ResultIterSpace.CounterStep = ISC.BuildCounterStep();
2658 ResultIterSpace.InitSrcRange = ISC.GetInitSrcRange();
2659 ResultIterSpace.CondSrcRange = ISC.GetConditionSrcRange();
2660 ResultIterSpace.IncSrcRange = ISC.GetIncrementSrcRange();
2661 ResultIterSpace.Subtract = ISC.ShouldSubtractStep();
2663 HasErrors |= (ResultIterSpace.PreCond == nullptr ||
2664 ResultIterSpace.NumIterations == nullptr ||
2665 ResultIterSpace.CounterVar == nullptr ||
2666 ResultIterSpace.CounterInit == nullptr ||
2667 ResultIterSpace.CounterStep == nullptr);
2672 /// \brief Build 'VarRef = Start + Iter * Step'.
2673 static ExprResult BuildCounterUpdate(Sema &SemaRef, Scope *S,
2674 SourceLocation Loc, ExprResult VarRef,
2675 ExprResult Start, ExprResult Iter,
2676 ExprResult Step, bool Subtract) {
2677 // Add parentheses (for debugging purposes only).
2678 Iter = SemaRef.ActOnParenExpr(Loc, Loc, Iter.get());
2679 if (!VarRef.isUsable() || !Start.isUsable() || !Iter.isUsable() ||
2683 ExprResult Update = SemaRef.BuildBinOp(S, Loc, BO_Mul, Iter.get(),
2684 Step.get()->IgnoreImplicit());
2685 if (!Update.isUsable())
2688 // Build 'VarRef = Start + Iter * Step'.
2689 Update = SemaRef.BuildBinOp(S, Loc, (Subtract ? BO_Sub : BO_Add),
2690 Start.get()->IgnoreImplicit(), Update.get());
2691 if (!Update.isUsable())
2694 Update = SemaRef.PerformImplicitConversion(
2695 Update.get(), VarRef.get()->getType(), Sema::AA_Converting, true);
2696 if (!Update.isUsable())
2699 Update = SemaRef.BuildBinOp(S, Loc, BO_Assign, VarRef.get(), Update.get());
2703 /// \brief Convert integer expression \a E to make it have at least \a Bits
2705 static ExprResult WidenIterationCount(unsigned Bits, Expr *E,
2709 auto &C = SemaRef.Context;
2710 QualType OldType = E->getType();
2711 unsigned HasBits = C.getTypeSize(OldType);
2712 if (HasBits >= Bits)
2713 return ExprResult(E);
2714 // OK to convert to signed, because new type has more bits than old.
2715 QualType NewType = C.getIntTypeForBitwidth(Bits, /* Signed */ true);
2716 return SemaRef.PerformImplicitConversion(E, NewType, Sema::AA_Converting,
2720 /// \brief Check if the given expression \a E is a constant integer that fits
2721 /// into \a Bits bits.
2722 static bool FitsInto(unsigned Bits, bool Signed, Expr *E, Sema &SemaRef) {
2725 llvm::APSInt Result;
2726 if (E->isIntegerConstantExpr(Result, SemaRef.Context))
2727 return Signed ? Result.isSignedIntN(Bits) : Result.isIntN(Bits);
2731 /// \brief Called on a for stmt to check itself and nested loops (if any).
2732 /// \return Returns 0 if one of the collapsed stmts is not canonical for loop,
2733 /// number of collapsed loops otherwise.
2735 CheckOpenMPLoop(OpenMPDirectiveKind DKind, Expr *NestedLoopCountExpr,
2736 Stmt *AStmt, Sema &SemaRef, DSAStackTy &DSA,
2737 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA,
2738 OMPLoopDirective::HelperExprs &Built) {
2739 unsigned NestedLoopCount = 1;
2740 if (NestedLoopCountExpr) {
2741 // Found 'collapse' clause - calculate collapse number.
2742 llvm::APSInt Result;
2743 if (NestedLoopCountExpr->EvaluateAsInt(Result, SemaRef.getASTContext()))
2744 NestedLoopCount = Result.getLimitedValue();
2746 // This is helper routine for loop directives (e.g., 'for', 'simd',
2747 // 'for simd', etc.).
2748 SmallVector<LoopIterationSpace, 4> IterSpaces;
2749 IterSpaces.resize(NestedLoopCount);
2750 Stmt *CurStmt = AStmt->IgnoreContainers(/* IgnoreCaptured */ true);
2751 for (unsigned Cnt = 0; Cnt < NestedLoopCount; ++Cnt) {
2752 if (CheckOpenMPIterationSpace(DKind, CurStmt, SemaRef, DSA, Cnt,
2753 NestedLoopCount, NestedLoopCountExpr,
2754 VarsWithImplicitDSA, IterSpaces[Cnt]))
2756 // Move on to the next nested for loop, or to the loop body.
2757 // OpenMP [2.8.1, simd construct, Restrictions]
2758 // All loops associated with the construct must be perfectly nested; that
2759 // is, there must be no intervening code nor any OpenMP directive between
2761 CurStmt = cast<ForStmt>(CurStmt)->getBody()->IgnoreContainers();
2764 Built.clear(/* size */ NestedLoopCount);
2766 if (SemaRef.CurContext->isDependentContext())
2767 return NestedLoopCount;
2769 // An example of what is generated for the following code:
2771 // #pragma omp simd collapse(2)
2772 // for (i = 0; i < NI; ++i)
2773 // for (j = J0; j < NJ; j+=2) {
2777 // We generate the code below.
2778 // Note: the loop body may be outlined in CodeGen.
2779 // Note: some counters may be C++ classes, operator- is used to find number of
2780 // iterations and operator+= to calculate counter value.
2781 // Note: decltype(NumIterations) must be integer type (in 'omp for', only i32
2782 // or i64 is currently supported).
2784 // #define NumIterations (NI * ((NJ - J0 - 1 + 2) / 2))
2785 // for (int[32|64]_t IV = 0; IV < NumIterations; ++IV ) {
2786 // .local.i = IV / ((NJ - J0 - 1 + 2) / 2);
2787 // .local.j = J0 + (IV % ((NJ - J0 - 1 + 2) / 2)) * 2;
2788 // // similar updates for vars in clauses (e.g. 'linear')
2789 // <loop body (using local i and j)>
2791 // i = NI; // assign final values of counters
2795 // Last iteration number is (I1 * I2 * ... In) - 1, where I1, I2 ... In are
2796 // the iteration counts of the collapsed for loops.
2797 // Precondition tests if there is at least one iteration (all conditions are
2799 auto PreCond = ExprResult(IterSpaces[0].PreCond);
2800 auto N0 = IterSpaces[0].NumIterations;
2801 ExprResult LastIteration32 = WidenIterationCount(32 /* Bits */, N0, SemaRef);
2802 ExprResult LastIteration64 = WidenIterationCount(64 /* Bits */, N0, SemaRef);
2804 if (!LastIteration32.isUsable() || !LastIteration64.isUsable())
2805 return NestedLoopCount;
2807 auto &C = SemaRef.Context;
2808 bool AllCountsNeedLessThan32Bits = C.getTypeSize(N0->getType()) < 32;
2810 Scope *CurScope = DSA.getCurScope();
2811 for (unsigned Cnt = 1; Cnt < NestedLoopCount; ++Cnt) {
2812 if (PreCond.isUsable()) {
2813 PreCond = SemaRef.BuildBinOp(CurScope, SourceLocation(), BO_LAnd,
2814 PreCond.get(), IterSpaces[Cnt].PreCond);
2816 auto N = IterSpaces[Cnt].NumIterations;
2817 AllCountsNeedLessThan32Bits &= C.getTypeSize(N->getType()) < 32;
2818 if (LastIteration32.isUsable())
2819 LastIteration32 = SemaRef.BuildBinOp(CurScope, SourceLocation(), BO_Mul,
2820 LastIteration32.get(), N);
2821 if (LastIteration64.isUsable())
2822 LastIteration64 = SemaRef.BuildBinOp(CurScope, SourceLocation(), BO_Mul,
2823 LastIteration64.get(), N);
2826 // Choose either the 32-bit or 64-bit version.
2827 ExprResult LastIteration = LastIteration64;
2828 if (LastIteration32.isUsable() &&
2829 C.getTypeSize(LastIteration32.get()->getType()) == 32 &&
2830 (AllCountsNeedLessThan32Bits || NestedLoopCount == 1 ||
2833 LastIteration32.get()->getType()->hasSignedIntegerRepresentation(),
2834 LastIteration64.get(), SemaRef)))
2835 LastIteration = LastIteration32;
2837 if (!LastIteration.isUsable())
2840 // Save the number of iterations.
2841 ExprResult NumIterations = LastIteration;
2843 LastIteration = SemaRef.BuildBinOp(
2844 CurScope, SourceLocation(), BO_Sub, LastIteration.get(),
2845 SemaRef.ActOnIntegerConstant(SourceLocation(), 1).get());
2846 if (!LastIteration.isUsable())
2850 // Calculate the last iteration number beforehand instead of doing this on
2851 // each iteration. Do not do this if the number of iterations may be kfold-ed.
2852 llvm::APSInt Result;
2854 LastIteration.get()->isIntegerConstantExpr(Result, SemaRef.Context);
2855 ExprResult CalcLastIteration;
2857 SourceLocation SaveLoc;
2859 buildVarDecl(SemaRef, SaveLoc, LastIteration.get()->getType(),
2860 ".omp.last.iteration");
2861 ExprResult SaveRef = buildDeclRefExpr(
2862 SemaRef, SaveVar, LastIteration.get()->getType(), SaveLoc);
2863 CalcLastIteration = SemaRef.BuildBinOp(CurScope, SaveLoc, BO_Assign,
2864 SaveRef.get(), LastIteration.get());
2865 LastIteration = SaveRef;
2867 // Prepare SaveRef + 1.
2868 NumIterations = SemaRef.BuildBinOp(
2869 CurScope, SaveLoc, BO_Add, SaveRef.get(),
2870 SemaRef.ActOnIntegerConstant(SourceLocation(), 1).get());
2871 if (!NumIterations.isUsable())
2875 SourceLocation InitLoc = IterSpaces[0].InitSrcRange.getBegin();
2877 QualType VType = LastIteration.get()->getType();
2878 // Build variables passed into runtime, nesessary for worksharing directives.
2879 ExprResult LB, UB, IL, ST, EUB;
2880 if (isOpenMPWorksharingDirective(DKind)) {
2881 // Lower bound variable, initialized with zero.
2882 VarDecl *LBDecl = buildVarDecl(SemaRef, InitLoc, VType, ".omp.lb");
2883 LB = buildDeclRefExpr(SemaRef, LBDecl, VType, InitLoc);
2884 SemaRef.AddInitializerToDecl(
2885 LBDecl, SemaRef.ActOnIntegerConstant(InitLoc, 0).get(),
2886 /*DirectInit*/ false, /*TypeMayContainAuto*/ false);
2888 // Upper bound variable, initialized with last iteration number.
2889 VarDecl *UBDecl = buildVarDecl(SemaRef, InitLoc, VType, ".omp.ub");
2890 UB = buildDeclRefExpr(SemaRef, UBDecl, VType, InitLoc);
2891 SemaRef.AddInitializerToDecl(UBDecl, LastIteration.get(),
2892 /*DirectInit*/ false,
2893 /*TypeMayContainAuto*/ false);
2895 // A 32-bit variable-flag where runtime returns 1 for the last iteration.
2896 // This will be used to implement clause 'lastprivate'.
2897 QualType Int32Ty = SemaRef.Context.getIntTypeForBitwidth(32, true);
2898 VarDecl *ILDecl = buildVarDecl(SemaRef, InitLoc, Int32Ty, ".omp.is_last");
2899 IL = buildDeclRefExpr(SemaRef, ILDecl, Int32Ty, InitLoc);
2900 SemaRef.AddInitializerToDecl(
2901 ILDecl, SemaRef.ActOnIntegerConstant(InitLoc, 0).get(),
2902 /*DirectInit*/ false, /*TypeMayContainAuto*/ false);
2904 // Stride variable returned by runtime (we initialize it to 1 by default).
2905 VarDecl *STDecl = buildVarDecl(SemaRef, InitLoc, VType, ".omp.stride");
2906 ST = buildDeclRefExpr(SemaRef, STDecl, VType, InitLoc);
2907 SemaRef.AddInitializerToDecl(
2908 STDecl, SemaRef.ActOnIntegerConstant(InitLoc, 1).get(),
2909 /*DirectInit*/ false, /*TypeMayContainAuto*/ false);
2911 // Build expression: UB = min(UB, LastIteration)
2912 // It is nesessary for CodeGen of directives with static scheduling.
2913 ExprResult IsUBGreater = SemaRef.BuildBinOp(CurScope, InitLoc, BO_GT,
2914 UB.get(), LastIteration.get());
2915 ExprResult CondOp = SemaRef.ActOnConditionalOp(
2916 InitLoc, InitLoc, IsUBGreater.get(), LastIteration.get(), UB.get());
2917 EUB = SemaRef.BuildBinOp(CurScope, InitLoc, BO_Assign, UB.get(),
2919 EUB = SemaRef.ActOnFinishFullExpr(EUB.get());
2922 // Build the iteration variable and its initialization before loop.
2926 VarDecl *IVDecl = buildVarDecl(SemaRef, InitLoc, VType, ".omp.iv");
2927 IV = buildDeclRefExpr(SemaRef, IVDecl, VType, InitLoc);
2928 Expr *RHS = isOpenMPWorksharingDirective(DKind)
2930 : SemaRef.ActOnIntegerConstant(SourceLocation(), 0).get();
2931 Init = SemaRef.BuildBinOp(CurScope, InitLoc, BO_Assign, IV.get(), RHS);
2932 Init = SemaRef.ActOnFinishFullExpr(Init.get());
2935 // Loop condition (IV < NumIterations) or (IV <= UB) for worksharing loops.
2936 SourceLocation CondLoc;
2938 isOpenMPWorksharingDirective(DKind)
2939 ? SemaRef.BuildBinOp(CurScope, CondLoc, BO_LE, IV.get(), UB.get())
2940 : SemaRef.BuildBinOp(CurScope, CondLoc, BO_LT, IV.get(),
2941 NumIterations.get());
2942 // Loop condition with 1 iteration separated (IV < LastIteration)
2943 ExprResult SeparatedCond = SemaRef.BuildBinOp(CurScope, CondLoc, BO_LT,
2944 IV.get(), LastIteration.get());
2946 // Loop increment (IV = IV + 1)
2947 SourceLocation IncLoc;
2949 SemaRef.BuildBinOp(CurScope, IncLoc, BO_Add, IV.get(),
2950 SemaRef.ActOnIntegerConstant(IncLoc, 1).get());
2951 if (!Inc.isUsable())
2953 Inc = SemaRef.BuildBinOp(CurScope, IncLoc, BO_Assign, IV.get(), Inc.get());
2954 Inc = SemaRef.ActOnFinishFullExpr(Inc.get());
2955 if (!Inc.isUsable())
2958 // Increments for worksharing loops (LB = LB + ST; UB = UB + ST).
2959 // Used for directives with static scheduling.
2960 ExprResult NextLB, NextUB;
2961 if (isOpenMPWorksharingDirective(DKind)) {
2963 NextLB = SemaRef.BuildBinOp(CurScope, IncLoc, BO_Add, LB.get(), ST.get());
2964 if (!NextLB.isUsable())
2968 SemaRef.BuildBinOp(CurScope, IncLoc, BO_Assign, LB.get(), NextLB.get());
2969 NextLB = SemaRef.ActOnFinishFullExpr(NextLB.get());
2970 if (!NextLB.isUsable())
2973 NextUB = SemaRef.BuildBinOp(CurScope, IncLoc, BO_Add, UB.get(), ST.get());
2974 if (!NextUB.isUsable())
2978 SemaRef.BuildBinOp(CurScope, IncLoc, BO_Assign, UB.get(), NextUB.get());
2979 NextUB = SemaRef.ActOnFinishFullExpr(NextUB.get());
2980 if (!NextUB.isUsable())
2984 // Build updates and final values of the loop counters.
2985 bool HasErrors = false;
2986 Built.Counters.resize(NestedLoopCount);
2987 Built.Updates.resize(NestedLoopCount);
2988 Built.Finals.resize(NestedLoopCount);
2991 // Go from inner nested loop to outer.
2992 for (int Cnt = NestedLoopCount - 1; Cnt >= 0; --Cnt) {
2993 LoopIterationSpace &IS = IterSpaces[Cnt];
2994 SourceLocation UpdLoc = IS.IncSrcRange.getBegin();
2995 // Build: Iter = (IV / Div) % IS.NumIters
2996 // where Div is product of previous iterations' IS.NumIters.
2998 if (Div.isUsable()) {
3000 SemaRef.BuildBinOp(CurScope, UpdLoc, BO_Div, IV.get(), Div.get());
3003 assert((Cnt == (int)NestedLoopCount - 1) &&
3004 "unusable div expected on first iteration only");
3007 if (Cnt != 0 && Iter.isUsable())
3008 Iter = SemaRef.BuildBinOp(CurScope, UpdLoc, BO_Rem, Iter.get(),
3010 if (!Iter.isUsable()) {
3015 // Build update: IS.CounterVar(Private) = IS.Start + Iter * IS.Step
3016 auto *CounterVar = buildDeclRefExpr(
3017 SemaRef, cast<VarDecl>(cast<DeclRefExpr>(IS.CounterVar)->getDecl()),
3018 IS.CounterVar->getType(), IS.CounterVar->getExprLoc(),
3019 /*RefersToCapture=*/true);
3021 BuildCounterUpdate(SemaRef, CurScope, UpdLoc, CounterVar,
3022 IS.CounterInit, Iter, IS.CounterStep, IS.Subtract);
3023 if (!Update.isUsable()) {
3028 // Build final: IS.CounterVar = IS.Start + IS.NumIters * IS.Step
3029 ExprResult Final = BuildCounterUpdate(
3030 SemaRef, CurScope, UpdLoc, CounterVar, IS.CounterInit,
3031 IS.NumIterations, IS.CounterStep, IS.Subtract);
3032 if (!Final.isUsable()) {
3037 // Build Div for the next iteration: Div <- Div * IS.NumIters
3040 Div = IS.NumIterations;
3042 Div = SemaRef.BuildBinOp(CurScope, UpdLoc, BO_Mul, Div.get(),
3045 // Add parentheses (for debugging purposes only).
3047 Div = SemaRef.ActOnParenExpr(UpdLoc, UpdLoc, Div.get());
3048 if (!Div.isUsable()) {
3053 if (!Update.isUsable() || !Final.isUsable()) {
3058 Built.Counters[Cnt] = IS.CounterVar;
3059 Built.Updates[Cnt] = Update.get();
3060 Built.Finals[Cnt] = Final.get();
3068 Built.IterationVarRef = IV.get();
3069 Built.LastIteration = LastIteration.get();
3070 Built.NumIterations = NumIterations.get();
3071 Built.CalcLastIteration = CalcLastIteration.get();
3072 Built.PreCond = PreCond.get();
3073 Built.Cond = Cond.get();
3074 Built.SeparatedCond = SeparatedCond.get();
3075 Built.Init = Init.get();
3076 Built.Inc = Inc.get();
3077 Built.LB = LB.get();
3078 Built.UB = UB.get();
3079 Built.IL = IL.get();
3080 Built.ST = ST.get();
3081 Built.EUB = EUB.get();
3082 Built.NLB = NextLB.get();
3083 Built.NUB = NextUB.get();
3085 return NestedLoopCount;
3088 static Expr *GetCollapseNumberExpr(ArrayRef<OMPClause *> Clauses) {
3089 auto &&CollapseFilter = [](const OMPClause *C) -> bool {
3090 return C->getClauseKind() == OMPC_collapse;
3092 OMPExecutableDirective::filtered_clause_iterator<decltype(CollapseFilter)> I(
3093 Clauses, std::move(CollapseFilter));
3095 return cast<OMPCollapseClause>(*I)->getNumForLoops();
3099 StmtResult Sema::ActOnOpenMPSimdDirective(
3100 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
3101 SourceLocation EndLoc,
3102 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA) {
3103 OMPLoopDirective::HelperExprs B;
3104 // In presence of clause 'collapse', it will define the nested loops number.
3105 unsigned NestedLoopCount =
3106 CheckOpenMPLoop(OMPD_simd, GetCollapseNumberExpr(Clauses), AStmt, *this,
3107 *DSAStack, VarsWithImplicitDSA, B);
3108 if (NestedLoopCount == 0)
3111 assert((CurContext->isDependentContext() || B.builtAll()) &&
3112 "omp simd loop exprs were not built");
3114 if (!CurContext->isDependentContext()) {
3115 // Finalize the clauses that need pre-built expressions for CodeGen.
3116 for (auto C : Clauses) {
3117 if (auto LC = dyn_cast<OMPLinearClause>(C))
3118 if (FinishOpenMPLinearClause(*LC, cast<DeclRefExpr>(B.IterationVarRef),
3119 B.NumIterations, *this, CurScope))
3124 getCurFunction()->setHasBranchProtectedScope();
3125 return OMPSimdDirective::Create(Context, StartLoc, EndLoc, NestedLoopCount,
3129 StmtResult Sema::ActOnOpenMPForDirective(
3130 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
3131 SourceLocation EndLoc,
3132 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA) {
3133 OMPLoopDirective::HelperExprs B;
3134 // In presence of clause 'collapse', it will define the nested loops number.
3135 unsigned NestedLoopCount =
3136 CheckOpenMPLoop(OMPD_for, GetCollapseNumberExpr(Clauses), AStmt, *this,
3137 *DSAStack, VarsWithImplicitDSA, B);
3138 if (NestedLoopCount == 0)
3141 assert((CurContext->isDependentContext() || B.builtAll()) &&
3142 "omp for loop exprs were not built");
3144 getCurFunction()->setHasBranchProtectedScope();
3145 return OMPForDirective::Create(Context, StartLoc, EndLoc, NestedLoopCount,
3149 StmtResult Sema::ActOnOpenMPForSimdDirective(
3150 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
3151 SourceLocation EndLoc,
3152 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA) {
3153 OMPLoopDirective::HelperExprs B;
3154 // In presence of clause 'collapse', it will define the nested loops number.
3155 unsigned NestedLoopCount =
3156 CheckOpenMPLoop(OMPD_for_simd, GetCollapseNumberExpr(Clauses), AStmt,
3157 *this, *DSAStack, VarsWithImplicitDSA, B);
3158 if (NestedLoopCount == 0)
3161 assert((CurContext->isDependentContext() || B.builtAll()) &&
3162 "omp for simd loop exprs were not built");
3164 getCurFunction()->setHasBranchProtectedScope();
3165 return OMPForSimdDirective::Create(Context, StartLoc, EndLoc, NestedLoopCount,
3169 StmtResult Sema::ActOnOpenMPSectionsDirective(ArrayRef<OMPClause *> Clauses,
3171 SourceLocation StartLoc,
3172 SourceLocation EndLoc) {
3173 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3174 auto BaseStmt = AStmt;
3175 while (CapturedStmt *CS = dyn_cast_or_null<CapturedStmt>(BaseStmt))
3176 BaseStmt = CS->getCapturedStmt();
3177 if (auto C = dyn_cast_or_null<CompoundStmt>(BaseStmt)) {
3178 auto S = C->children();
3181 // All associated statements must be '#pragma omp section' except for
3184 auto SectionStmt = *S;
3185 if (!SectionStmt || !isa<OMPSectionDirective>(SectionStmt)) {
3187 Diag(SectionStmt->getLocStart(),
3188 diag::err_omp_sections_substmt_not_section);
3193 Diag(AStmt->getLocStart(), diag::err_omp_sections_not_compound_stmt);
3197 getCurFunction()->setHasBranchProtectedScope();
3199 return OMPSectionsDirective::Create(Context, StartLoc, EndLoc, Clauses,
3203 StmtResult Sema::ActOnOpenMPSectionDirective(Stmt *AStmt,
3204 SourceLocation StartLoc,
3205 SourceLocation EndLoc) {
3206 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3208 getCurFunction()->setHasBranchProtectedScope();
3210 return OMPSectionDirective::Create(Context, StartLoc, EndLoc, AStmt);
3213 StmtResult Sema::ActOnOpenMPSingleDirective(ArrayRef<OMPClause *> Clauses,
3215 SourceLocation StartLoc,
3216 SourceLocation EndLoc) {
3217 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3219 getCurFunction()->setHasBranchProtectedScope();
3221 // OpenMP [2.7.3, single Construct, Restrictions]
3222 // The copyprivate clause must not be used with the nowait clause.
3223 OMPClause *Nowait = nullptr;
3224 OMPClause *Copyprivate = nullptr;
3225 for (auto *Clause : Clauses) {
3226 if (Clause->getClauseKind() == OMPC_nowait)
3228 else if (Clause->getClauseKind() == OMPC_copyprivate)
3229 Copyprivate = Clause;
3230 if (Copyprivate && Nowait) {
3231 Diag(Copyprivate->getLocStart(),
3232 diag::err_omp_single_copyprivate_with_nowait);
3233 Diag(Nowait->getLocStart(), diag::note_omp_nowait_clause_here);
3238 return OMPSingleDirective::Create(Context, StartLoc, EndLoc, Clauses, AStmt);
3241 StmtResult Sema::ActOnOpenMPMasterDirective(Stmt *AStmt,
3242 SourceLocation StartLoc,
3243 SourceLocation EndLoc) {
3244 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3246 getCurFunction()->setHasBranchProtectedScope();
3248 return OMPMasterDirective::Create(Context, StartLoc, EndLoc, AStmt);
3252 Sema::ActOnOpenMPCriticalDirective(const DeclarationNameInfo &DirName,
3253 Stmt *AStmt, SourceLocation StartLoc,
3254 SourceLocation EndLoc) {
3255 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3257 getCurFunction()->setHasBranchProtectedScope();
3259 return OMPCriticalDirective::Create(Context, DirName, StartLoc, EndLoc,
3263 StmtResult Sema::ActOnOpenMPParallelForDirective(
3264 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
3265 SourceLocation EndLoc,
3266 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA) {
3267 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3268 CapturedStmt *CS = cast<CapturedStmt>(AStmt);
3269 // 1.2.2 OpenMP Language Terminology
3270 // Structured block - An executable statement with a single entry at the
3271 // top and a single exit at the bottom.
3272 // The point of exit cannot be a branch out of the structured block.
3273 // longjmp() and throw() must not violate the entry/exit criteria.
3274 CS->getCapturedDecl()->setNothrow();
3276 OMPLoopDirective::HelperExprs B;
3277 // In presence of clause 'collapse', it will define the nested loops number.
3278 unsigned NestedLoopCount =
3279 CheckOpenMPLoop(OMPD_parallel_for, GetCollapseNumberExpr(Clauses), AStmt,
3280 *this, *DSAStack, VarsWithImplicitDSA, B);
3281 if (NestedLoopCount == 0)
3284 assert((CurContext->isDependentContext() || B.builtAll()) &&
3285 "omp parallel for loop exprs were not built");
3287 getCurFunction()->setHasBranchProtectedScope();
3288 return OMPParallelForDirective::Create(Context, StartLoc, EndLoc,
3289 NestedLoopCount, Clauses, AStmt, B);
3292 StmtResult Sema::ActOnOpenMPParallelForSimdDirective(
3293 ArrayRef<OMPClause *> Clauses, Stmt *AStmt, SourceLocation StartLoc,
3294 SourceLocation EndLoc,
3295 llvm::DenseMap<VarDecl *, Expr *> &VarsWithImplicitDSA) {
3296 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3297 CapturedStmt *CS = cast<CapturedStmt>(AStmt);
3298 // 1.2.2 OpenMP Language Terminology
3299 // Structured block - An executable statement with a single entry at the
3300 // top and a single exit at the bottom.
3301 // The point of exit cannot be a branch out of the structured block.
3302 // longjmp() and throw() must not violate the entry/exit criteria.
3303 CS->getCapturedDecl()->setNothrow();
3305 OMPLoopDirective::HelperExprs B;
3306 // In presence of clause 'collapse', it will define the nested loops number.
3307 unsigned NestedLoopCount =
3308 CheckOpenMPLoop(OMPD_parallel_for_simd, GetCollapseNumberExpr(Clauses),
3309 AStmt, *this, *DSAStack, VarsWithImplicitDSA, B);
3310 if (NestedLoopCount == 0)
3313 getCurFunction()->setHasBranchProtectedScope();
3314 return OMPParallelForSimdDirective::Create(
3315 Context, StartLoc, EndLoc, NestedLoopCount, Clauses, AStmt, B);
3319 Sema::ActOnOpenMPParallelSectionsDirective(ArrayRef<OMPClause *> Clauses,
3320 Stmt *AStmt, SourceLocation StartLoc,
3321 SourceLocation EndLoc) {
3322 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3323 auto BaseStmt = AStmt;
3324 while (CapturedStmt *CS = dyn_cast_or_null<CapturedStmt>(BaseStmt))
3325 BaseStmt = CS->getCapturedStmt();
3326 if (auto C = dyn_cast_or_null<CompoundStmt>(BaseStmt)) {
3327 auto S = C->children();
3330 // All associated statements must be '#pragma omp section' except for
3333 auto SectionStmt = *S;
3334 if (!SectionStmt || !isa<OMPSectionDirective>(SectionStmt)) {
3336 Diag(SectionStmt->getLocStart(),
3337 diag::err_omp_parallel_sections_substmt_not_section);
3342 Diag(AStmt->getLocStart(),
3343 diag::err_omp_parallel_sections_not_compound_stmt);
3347 getCurFunction()->setHasBranchProtectedScope();
3349 return OMPParallelSectionsDirective::Create(Context, StartLoc, EndLoc,
3353 StmtResult Sema::ActOnOpenMPTaskDirective(ArrayRef<OMPClause *> Clauses,
3354 Stmt *AStmt, SourceLocation StartLoc,
3355 SourceLocation EndLoc) {
3356 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3357 CapturedStmt *CS = cast<CapturedStmt>(AStmt);
3358 // 1.2.2 OpenMP Language Terminology
3359 // Structured block - An executable statement with a single entry at the
3360 // top and a single exit at the bottom.
3361 // The point of exit cannot be a branch out of the structured block.
3362 // longjmp() and throw() must not violate the entry/exit criteria.
3363 CS->getCapturedDecl()->setNothrow();
3365 getCurFunction()->setHasBranchProtectedScope();
3367 return OMPTaskDirective::Create(Context, StartLoc, EndLoc, Clauses, AStmt);
3370 StmtResult Sema::ActOnOpenMPTaskyieldDirective(SourceLocation StartLoc,
3371 SourceLocation EndLoc) {
3372 return OMPTaskyieldDirective::Create(Context, StartLoc, EndLoc);
3375 StmtResult Sema::ActOnOpenMPBarrierDirective(SourceLocation StartLoc,
3376 SourceLocation EndLoc) {
3377 return OMPBarrierDirective::Create(Context, StartLoc, EndLoc);
3380 StmtResult Sema::ActOnOpenMPTaskwaitDirective(SourceLocation StartLoc,
3381 SourceLocation EndLoc) {
3382 return OMPTaskwaitDirective::Create(Context, StartLoc, EndLoc);
3385 StmtResult Sema::ActOnOpenMPFlushDirective(ArrayRef<OMPClause *> Clauses,
3386 SourceLocation StartLoc,
3387 SourceLocation EndLoc) {
3388 assert(Clauses.size() <= 1 && "Extra clauses in flush directive");
3389 return OMPFlushDirective::Create(Context, StartLoc, EndLoc, Clauses);
3392 StmtResult Sema::ActOnOpenMPOrderedDirective(Stmt *AStmt,
3393 SourceLocation StartLoc,
3394 SourceLocation EndLoc) {
3395 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3397 getCurFunction()->setHasBranchProtectedScope();
3399 return OMPOrderedDirective::Create(Context, StartLoc, EndLoc, AStmt);
3403 /// \brief Helper class for checking expression in 'omp atomic [update]'
3405 class OpenMPAtomicUpdateChecker {
3406 /// \brief Error results for atomic update expressions.
3407 enum ExprAnalysisErrorCode {
3408 /// \brief A statement is not an expression statement.
3410 /// \brief Expression is not builtin binary or unary operation.
3411 NotABinaryOrUnaryExpression,
3412 /// \brief Unary operation is not post-/pre- increment/decrement operation.
3413 NotAnUnaryIncDecExpression,
3414 /// \brief An expression is not of scalar type.
3416 /// \brief A binary operation is not an assignment operation.
3418 /// \brief RHS part of the binary operation is not a binary expression.
3419 NotABinaryExpression,
3420 /// \brief RHS part is not additive/multiplicative/shift/biwise binary
3423 /// \brief RHS binary operation does not have reference to the updated LHS
3425 NotAnUpdateExpression,
3426 /// \brief No errors is found.
3429 /// \brief Reference to Sema.
3431 /// \brief A location for note diagnostics (when error is found).
3432 SourceLocation NoteLoc;
3433 /// \brief 'x' lvalue part of the source atomic expression.
3435 /// \brief 'expr' rvalue part of the source atomic expression.
3437 /// \brief Helper expression of the form
3438 /// 'OpaqueValueExpr(x) binop OpaqueValueExpr(expr)' or
3439 /// 'OpaqueValueExpr(expr) binop OpaqueValueExpr(x)'.
3441 /// \brief Is 'x' a LHS in a RHS part of full update expression. It is
3442 /// important for non-associative operations.
3443 bool IsXLHSInRHSPart;
3444 BinaryOperatorKind Op;
3445 SourceLocation OpLoc;
3446 /// \brief true if the source expression is a postfix unary operation, false
3447 /// if it is a prefix unary operation.
3448 bool IsPostfixUpdate;
3451 OpenMPAtomicUpdateChecker(Sema &SemaRef)
3452 : SemaRef(SemaRef), X(nullptr), E(nullptr), UpdateExpr(nullptr),
3453 IsXLHSInRHSPart(false), Op(BO_PtrMemD), IsPostfixUpdate(false) {}
3454 /// \brief Check specified statement that it is suitable for 'atomic update'
3455 /// constructs and extract 'x', 'expr' and Operation from the original
3456 /// expression. If DiagId and NoteId == 0, then only check is performed
3457 /// without error notification.
3458 /// \param DiagId Diagnostic which should be emitted if error is found.
3459 /// \param NoteId Diagnostic note for the main error message.
3460 /// \return true if statement is not an update expression, false otherwise.
3461 bool checkStatement(Stmt *S, unsigned DiagId = 0, unsigned NoteId = 0);
3462 /// \brief Return the 'x' lvalue part of the source atomic expression.
3463 Expr *getX() const { return X; }
3464 /// \brief Return the 'expr' rvalue part of the source atomic expression.
3465 Expr *getExpr() const { return E; }
3466 /// \brief Return the update expression used in calculation of the updated
3467 /// value. Always has form 'OpaqueValueExpr(x) binop OpaqueValueExpr(expr)' or
3468 /// 'OpaqueValueExpr(expr) binop OpaqueValueExpr(x)'.
3469 Expr *getUpdateExpr() const { return UpdateExpr; }
3470 /// \brief Return true if 'x' is LHS in RHS part of full update expression,
3471 /// false otherwise.
3472 bool isXLHSInRHSPart() const { return IsXLHSInRHSPart; }
3474 /// \brief true if the source expression is a postfix unary operation, false
3475 /// if it is a prefix unary operation.
3476 bool isPostfixUpdate() const { return IsPostfixUpdate; }
3479 bool checkBinaryOperation(BinaryOperator *AtomicBinOp, unsigned DiagId = 0,
3480 unsigned NoteId = 0);
3484 bool OpenMPAtomicUpdateChecker::checkBinaryOperation(
3485 BinaryOperator *AtomicBinOp, unsigned DiagId, unsigned NoteId) {
3486 ExprAnalysisErrorCode ErrorFound = NoError;
3487 SourceLocation ErrorLoc, NoteLoc;
3488 SourceRange ErrorRange, NoteRange;
3489 // Allowed constructs are:
3490 // x = x binop expr;
3491 // x = expr binop x;
3492 if (AtomicBinOp->getOpcode() == BO_Assign) {
3493 X = AtomicBinOp->getLHS();
3494 if (auto *AtomicInnerBinOp = dyn_cast<BinaryOperator>(
3495 AtomicBinOp->getRHS()->IgnoreParenImpCasts())) {
3496 if (AtomicInnerBinOp->isMultiplicativeOp() ||
3497 AtomicInnerBinOp->isAdditiveOp() || AtomicInnerBinOp->isShiftOp() ||
3498 AtomicInnerBinOp->isBitwiseOp()) {
3499 Op = AtomicInnerBinOp->getOpcode();
3500 OpLoc = AtomicInnerBinOp->getOperatorLoc();
3501 auto *LHS = AtomicInnerBinOp->getLHS();
3502 auto *RHS = AtomicInnerBinOp->getRHS();
3503 llvm::FoldingSetNodeID XId, LHSId, RHSId;
3504 X->IgnoreParenImpCasts()->Profile(XId, SemaRef.getASTContext(),
3505 /*Canonical=*/true);
3506 LHS->IgnoreParenImpCasts()->Profile(LHSId, SemaRef.getASTContext(),
3507 /*Canonical=*/true);
3508 RHS->IgnoreParenImpCasts()->Profile(RHSId, SemaRef.getASTContext(),
3509 /*Canonical=*/true);
3512 IsXLHSInRHSPart = true;
3513 } else if (XId == RHSId) {
3515 IsXLHSInRHSPart = false;
3517 ErrorLoc = AtomicInnerBinOp->getExprLoc();
3518 ErrorRange = AtomicInnerBinOp->getSourceRange();
3519 NoteLoc = X->getExprLoc();
3520 NoteRange = X->getSourceRange();
3521 ErrorFound = NotAnUpdateExpression;
3524 ErrorLoc = AtomicInnerBinOp->getExprLoc();
3525 ErrorRange = AtomicInnerBinOp->getSourceRange();
3526 NoteLoc = AtomicInnerBinOp->getOperatorLoc();
3527 NoteRange = SourceRange(NoteLoc, NoteLoc);
3528 ErrorFound = NotABinaryOperator;
3531 NoteLoc = ErrorLoc = AtomicBinOp->getRHS()->getExprLoc();
3532 NoteRange = ErrorRange = AtomicBinOp->getRHS()->getSourceRange();
3533 ErrorFound = NotABinaryExpression;
3536 ErrorLoc = AtomicBinOp->getExprLoc();
3537 ErrorRange = AtomicBinOp->getSourceRange();
3538 NoteLoc = AtomicBinOp->getOperatorLoc();
3539 NoteRange = SourceRange(NoteLoc, NoteLoc);
3540 ErrorFound = NotAnAssignmentOp;
3542 if (ErrorFound != NoError && DiagId != 0 && NoteId != 0) {
3543 SemaRef.Diag(ErrorLoc, DiagId) << ErrorRange;
3544 SemaRef.Diag(NoteLoc, NoteId) << ErrorFound << NoteRange;
3546 } else if (SemaRef.CurContext->isDependentContext())
3547 E = X = UpdateExpr = nullptr;
3548 return ErrorFound != NoError;
3551 bool OpenMPAtomicUpdateChecker::checkStatement(Stmt *S, unsigned DiagId,
3553 ExprAnalysisErrorCode ErrorFound = NoError;
3554 SourceLocation ErrorLoc, NoteLoc;
3555 SourceRange ErrorRange, NoteRange;
3556 // Allowed constructs are:
3562 // x = x binop expr;
3563 // x = expr binop x;
3564 if (auto *AtomicBody = dyn_cast<Expr>(S)) {
3565 AtomicBody = AtomicBody->IgnoreParenImpCasts();
3566 if (AtomicBody->getType()->isScalarType() ||
3567 AtomicBody->isInstantiationDependent()) {
3568 if (auto *AtomicCompAssignOp = dyn_cast<CompoundAssignOperator>(
3569 AtomicBody->IgnoreParenImpCasts())) {
3570 // Check for Compound Assignment Operation
3571 Op = BinaryOperator::getOpForCompoundAssignment(
3572 AtomicCompAssignOp->getOpcode());
3573 OpLoc = AtomicCompAssignOp->getOperatorLoc();
3574 E = AtomicCompAssignOp->getRHS();
3575 X = AtomicCompAssignOp->getLHS();
3576 IsXLHSInRHSPart = true;
3577 } else if (auto *AtomicBinOp = dyn_cast<BinaryOperator>(
3578 AtomicBody->IgnoreParenImpCasts())) {
3579 // Check for Binary Operation
3580 if(checkBinaryOperation(AtomicBinOp, DiagId, NoteId))
3582 } else if (auto *AtomicUnaryOp =
3583 dyn_cast<UnaryOperator>(AtomicBody->IgnoreParenImpCasts())) {
3584 // Check for Unary Operation
3585 if (AtomicUnaryOp->isIncrementDecrementOp()) {
3586 IsPostfixUpdate = AtomicUnaryOp->isPostfix();
3587 Op = AtomicUnaryOp->isIncrementOp() ? BO_Add : BO_Sub;
3588 OpLoc = AtomicUnaryOp->getOperatorLoc();
3589 X = AtomicUnaryOp->getSubExpr();
3590 E = SemaRef.ActOnIntegerConstant(OpLoc, /*uint64_t Val=*/1).get();
3591 IsXLHSInRHSPart = true;
3593 ErrorFound = NotAnUnaryIncDecExpression;
3594 ErrorLoc = AtomicUnaryOp->getExprLoc();
3595 ErrorRange = AtomicUnaryOp->getSourceRange();
3596 NoteLoc = AtomicUnaryOp->getOperatorLoc();
3597 NoteRange = SourceRange(NoteLoc, NoteLoc);
3600 ErrorFound = NotABinaryOrUnaryExpression;
3601 NoteLoc = ErrorLoc = AtomicBody->getExprLoc();
3602 NoteRange = ErrorRange = AtomicBody->getSourceRange();
3605 ErrorFound = NotAScalarType;
3606 NoteLoc = ErrorLoc = AtomicBody->getLocStart();
3607 NoteRange = ErrorRange = SourceRange(NoteLoc, NoteLoc);
3610 ErrorFound = NotAnExpression;
3611 NoteLoc = ErrorLoc = S->getLocStart();
3612 NoteRange = ErrorRange = SourceRange(NoteLoc, NoteLoc);
3614 if (ErrorFound != NoError && DiagId != 0 && NoteId != 0) {
3615 SemaRef.Diag(ErrorLoc, DiagId) << ErrorRange;
3616 SemaRef.Diag(NoteLoc, NoteId) << ErrorFound << NoteRange;
3618 } else if (SemaRef.CurContext->isDependentContext())
3619 E = X = UpdateExpr = nullptr;
3620 if (ErrorFound == NoError && E && X) {
3621 // Build an update expression of form 'OpaqueValueExpr(x) binop
3622 // OpaqueValueExpr(expr)' or 'OpaqueValueExpr(expr) binop
3623 // OpaqueValueExpr(x)' and then cast it to the type of the 'x' expression.
3624 auto *OVEX = new (SemaRef.getASTContext())
3625 OpaqueValueExpr(X->getExprLoc(), X->getType(), VK_RValue);
3626 auto *OVEExpr = new (SemaRef.getASTContext())
3627 OpaqueValueExpr(E->getExprLoc(), E->getType(), VK_RValue);
3629 SemaRef.CreateBuiltinBinOp(OpLoc, Op, IsXLHSInRHSPart ? OVEX : OVEExpr,
3630 IsXLHSInRHSPart ? OVEExpr : OVEX);
3631 if (Update.isInvalid())
3633 Update = SemaRef.PerformImplicitConversion(Update.get(), X->getType(),
3635 if (Update.isInvalid())
3637 UpdateExpr = Update.get();
3639 return ErrorFound != NoError;
3642 StmtResult Sema::ActOnOpenMPAtomicDirective(ArrayRef<OMPClause *> Clauses,
3644 SourceLocation StartLoc,
3645 SourceLocation EndLoc) {
3646 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
3647 auto CS = cast<CapturedStmt>(AStmt);
3648 // 1.2.2 OpenMP Language Terminology
3649 // Structured block - An executable statement with a single entry at the
3650 // top and a single exit at the bottom.
3651 // The point of exit cannot be a branch out of the structured block.
3652 // longjmp() and throw() must not violate the entry/exit criteria.
3653 OpenMPClauseKind AtomicKind = OMPC_unknown;
3654 SourceLocation AtomicKindLoc;
3655 for (auto *C : Clauses) {
3656 if (C->getClauseKind() == OMPC_read || C->getClauseKind() == OMPC_write ||
3657 C->getClauseKind() == OMPC_update ||
3658 C->getClauseKind() == OMPC_capture) {
3659 if (AtomicKind != OMPC_unknown) {
3660 Diag(C->getLocStart(), diag::err_omp_atomic_several_clauses)
3661 << SourceRange(C->getLocStart(), C->getLocEnd());
3662 Diag(AtomicKindLoc, diag::note_omp_atomic_previous_clause)
3663 << getOpenMPClauseName(AtomicKind);
3665 AtomicKind = C->getClauseKind();
3666 AtomicKindLoc = C->getLocStart();
3671 auto Body = CS->getCapturedStmt();
3672 if (auto *EWC = dyn_cast<ExprWithCleanups>(Body))
3673 Body = EWC->getSubExpr();
3679 bool IsXLHSInRHSPart = false;
3680 bool IsPostfixUpdate = false;
3681 // OpenMP [2.12.6, atomic Construct]
3682 // In the next expressions:
3683 // * x and v (as applicable) are both l-value expressions with scalar type.
3684 // * During the execution of an atomic region, multiple syntactic
3685 // occurrences of x must designate the same storage location.
3686 // * Neither of v and expr (as applicable) may access the storage location
3688 // * Neither of x and expr (as applicable) may access the storage location
3690 // * expr is an expression with scalar type.
3691 // * binop is one of +, *, -, /, &, ^, |, <<, or >>.
3692 // * binop, binop=, ++, and -- are not overloaded operators.
3693 // * The expression x binop expr must be numerically equivalent to x binop
3694 // (expr). This requirement is satisfied if the operators in expr have
3695 // precedence greater than binop, or by using parentheses around expr or
3696 // subexpressions of expr.
3697 // * The expression expr binop x must be numerically equivalent to (expr)
3698 // binop x. This requirement is satisfied if the operators in expr have
3699 // precedence equal to or greater than binop, or by using parentheses around
3700 // expr or subexpressions of expr.
3701 // * For forms that allow multiple occurrences of x, the number of times
3702 // that x is evaluated is unspecified.
3703 if (AtomicKind == OMPC_read) {
3710 } ErrorFound = NoError;
3711 SourceLocation ErrorLoc, NoteLoc;
3712 SourceRange ErrorRange, NoteRange;
3713 // If clause is read:
3715 if (auto AtomicBody = dyn_cast<Expr>(Body)) {
3717 dyn_cast<BinaryOperator>(AtomicBody->IgnoreParenImpCasts());
3718 if (AtomicBinOp && AtomicBinOp->getOpcode() == BO_Assign) {
3719 X = AtomicBinOp->getRHS()->IgnoreParenImpCasts();
3720 V = AtomicBinOp->getLHS()->IgnoreParenImpCasts();
3721 if ((X->isInstantiationDependent() || X->getType()->isScalarType()) &&
3722 (V->isInstantiationDependent() || V->getType()->isScalarType())) {
3723 if (!X->isLValue() || !V->isLValue()) {
3724 auto NotLValueExpr = X->isLValue() ? V : X;
3725 ErrorFound = NotAnLValue;
3726 ErrorLoc = AtomicBinOp->getExprLoc();
3727 ErrorRange = AtomicBinOp->getSourceRange();
3728 NoteLoc = NotLValueExpr->getExprLoc();
3729 NoteRange = NotLValueExpr->getSourceRange();
3731 } else if (!X->isInstantiationDependent() ||
3732 !V->isInstantiationDependent()) {
3733 auto NotScalarExpr =
3734 (X->isInstantiationDependent() || X->getType()->isScalarType())
3737 ErrorFound = NotAScalarType;
3738 ErrorLoc = AtomicBinOp->getExprLoc();
3739 ErrorRange = AtomicBinOp->getSourceRange();
3740 NoteLoc = NotScalarExpr->getExprLoc();
3741 NoteRange = NotScalarExpr->getSourceRange();
3744 ErrorFound = NotAnAssignmentOp;
3745 ErrorLoc = AtomicBody->getExprLoc();
3746 ErrorRange = AtomicBody->getSourceRange();
3747 NoteLoc = AtomicBinOp ? AtomicBinOp->getOperatorLoc()
3748 : AtomicBody->getExprLoc();
3749 NoteRange = AtomicBinOp ? AtomicBinOp->getSourceRange()
3750 : AtomicBody->getSourceRange();
3753 ErrorFound = NotAnExpression;
3754 NoteLoc = ErrorLoc = Body->getLocStart();
3755 NoteRange = ErrorRange = SourceRange(NoteLoc, NoteLoc);
3757 if (ErrorFound != NoError) {
3758 Diag(ErrorLoc, diag::err_omp_atomic_read_not_expression_statement)
3760 Diag(NoteLoc, diag::note_omp_atomic_read_write) << ErrorFound
3763 } else if (CurContext->isDependentContext())
3765 } else if (AtomicKind == OMPC_write) {
3772 } ErrorFound = NoError;
3773 SourceLocation ErrorLoc, NoteLoc;
3774 SourceRange ErrorRange, NoteRange;
3775 // If clause is write:
3777 if (auto AtomicBody = dyn_cast<Expr>(Body)) {
3779 dyn_cast<BinaryOperator>(AtomicBody->IgnoreParenImpCasts());
3780 if (AtomicBinOp && AtomicBinOp->getOpcode() == BO_Assign) {
3781 X = AtomicBinOp->getLHS();
3782 E = AtomicBinOp->getRHS();
3783 if ((X->isInstantiationDependent() || X->getType()->isScalarType()) &&
3784 (E->isInstantiationDependent() || E->getType()->isScalarType())) {
3785 if (!X->isLValue()) {
3786 ErrorFound = NotAnLValue;
3787 ErrorLoc = AtomicBinOp->getExprLoc();
3788 ErrorRange = AtomicBinOp->getSourceRange();
3789 NoteLoc = X->getExprLoc();
3790 NoteRange = X->getSourceRange();
3792 } else if (!X->isInstantiationDependent() ||
3793 !E->isInstantiationDependent()) {
3794 auto NotScalarExpr =
3795 (X->isInstantiationDependent() || X->getType()->isScalarType())
3798 ErrorFound = NotAScalarType;
3799 ErrorLoc = AtomicBinOp->getExprLoc();
3800 ErrorRange = AtomicBinOp->getSourceRange();
3801 NoteLoc = NotScalarExpr->getExprLoc();
3802 NoteRange = NotScalarExpr->getSourceRange();
3805 ErrorFound = NotAnAssignmentOp;
3806 ErrorLoc = AtomicBody->getExprLoc();
3807 ErrorRange = AtomicBody->getSourceRange();
3808 NoteLoc = AtomicBinOp ? AtomicBinOp->getOperatorLoc()
3809 : AtomicBody->getExprLoc();
3810 NoteRange = AtomicBinOp ? AtomicBinOp->getSourceRange()
3811 : AtomicBody->getSourceRange();
3814 ErrorFound = NotAnExpression;
3815 NoteLoc = ErrorLoc = Body->getLocStart();
3816 NoteRange = ErrorRange = SourceRange(NoteLoc, NoteLoc);
3818 if (ErrorFound != NoError) {
3819 Diag(ErrorLoc, diag::err_omp_atomic_write_not_expression_statement)
3821 Diag(NoteLoc, diag::note_omp_atomic_read_write) << ErrorFound
3824 } else if (CurContext->isDependentContext())
3826 } else if (AtomicKind == OMPC_update || AtomicKind == OMPC_unknown) {
3827 // If clause is update:
3833 // x = x binop expr;
3834 // x = expr binop x;
3835 OpenMPAtomicUpdateChecker Checker(*this);
3836 if (Checker.checkStatement(
3837 Body, (AtomicKind == OMPC_update)
3838 ? diag::err_omp_atomic_update_not_expression_statement
3839 : diag::err_omp_atomic_not_expression_statement,
3840 diag::note_omp_atomic_update))
3842 if (!CurContext->isDependentContext()) {
3843 E = Checker.getExpr();
3845 UE = Checker.getUpdateExpr();
3846 IsXLHSInRHSPart = Checker.isXLHSInRHSPart();
3848 } else if (AtomicKind == OMPC_capture) {
3851 NotACompoundStatement,
3852 NotTwoSubstatements,
3853 NotASpecificExpression,
3855 } ErrorFound = NoError;
3856 SourceLocation ErrorLoc, NoteLoc;
3857 SourceRange ErrorRange, NoteRange;
3858 if (auto *AtomicBody = dyn_cast<Expr>(Body)) {
3859 // If clause is a capture:
3864 // v = x binop= expr;
3865 // v = x = x binop expr;
3866 // v = x = expr binop x;
3868 dyn_cast<BinaryOperator>(AtomicBody->IgnoreParenImpCasts());
3869 if (AtomicBinOp && AtomicBinOp->getOpcode() == BO_Assign) {
3870 V = AtomicBinOp->getLHS();
3871 Body = AtomicBinOp->getRHS()->IgnoreParenImpCasts();
3872 OpenMPAtomicUpdateChecker Checker(*this);
3873 if (Checker.checkStatement(
3874 Body, diag::err_omp_atomic_capture_not_expression_statement,
3875 diag::note_omp_atomic_update))
3877 E = Checker.getExpr();
3879 UE = Checker.getUpdateExpr();
3880 IsXLHSInRHSPart = Checker.isXLHSInRHSPart();
3881 IsPostfixUpdate = Checker.isPostfixUpdate();
3883 ErrorLoc = AtomicBody->getExprLoc();
3884 ErrorRange = AtomicBody->getSourceRange();
3885 NoteLoc = AtomicBinOp ? AtomicBinOp->getOperatorLoc()
3886 : AtomicBody->getExprLoc();
3887 NoteRange = AtomicBinOp ? AtomicBinOp->getSourceRange()
3888 : AtomicBody->getSourceRange();
3889 ErrorFound = NotAnAssignmentOp;
3891 if (ErrorFound != NoError) {
3892 Diag(ErrorLoc, diag::err_omp_atomic_capture_not_expression_statement)
3894 Diag(NoteLoc, diag::note_omp_atomic_capture) << ErrorFound << NoteRange;
3896 } else if (CurContext->isDependentContext()) {
3897 UE = V = E = X = nullptr;
3900 // If clause is a capture:
3901 // { v = x; x = expr; }
3906 // { v = x; x binop= expr; }
3907 // { v = x; x = x binop expr; }
3908 // { v = x; x = expr binop x; }
3913 // { x binop= expr; v = x; }
3914 // { x = x binop expr; v = x; }
3915 // { x = expr binop x; v = x; }
3916 if (auto *CS = dyn_cast<CompoundStmt>(Body)) {
3917 // Check that this is { expr1; expr2; }
3918 if (CS->size() == 2) {
3919 auto *First = CS->body_front();
3920 auto *Second = CS->body_back();
3921 if (auto *EWC = dyn_cast<ExprWithCleanups>(First))
3922 First = EWC->getSubExpr()->IgnoreParenImpCasts();
3923 if (auto *EWC = dyn_cast<ExprWithCleanups>(Second))
3924 Second = EWC->getSubExpr()->IgnoreParenImpCasts();
3925 // Need to find what subexpression is 'v' and what is 'x'.
3926 OpenMPAtomicUpdateChecker Checker(*this);
3927 bool IsUpdateExprFound = !Checker.checkStatement(Second);
3928 BinaryOperator *BinOp = nullptr;
3929 if (IsUpdateExprFound) {
3930 BinOp = dyn_cast<BinaryOperator>(First);
3931 IsUpdateExprFound = BinOp && BinOp->getOpcode() == BO_Assign;
3933 if (IsUpdateExprFound && !CurContext->isDependentContext()) {
3938 // { v = x; x binop= expr; }
3939 // { v = x; x = x binop expr; }
3940 // { v = x; x = expr binop x; }
3941 // Check that the first expression has form v = x.
3942 auto *PossibleX = BinOp->getRHS()->IgnoreParenImpCasts();
3943 llvm::FoldingSetNodeID XId, PossibleXId;
3944 Checker.getX()->Profile(XId, Context, /*Canonical=*/true);
3945 PossibleX->Profile(PossibleXId, Context, /*Canonical=*/true);
3946 IsUpdateExprFound = XId == PossibleXId;
3947 if (IsUpdateExprFound) {
3948 V = BinOp->getLHS();
3950 E = Checker.getExpr();
3951 UE = Checker.getUpdateExpr();
3952 IsXLHSInRHSPart = Checker.isXLHSInRHSPart();
3953 IsPostfixUpdate = true;
3956 if (!IsUpdateExprFound) {
3957 IsUpdateExprFound = !Checker.checkStatement(First);
3959 if (IsUpdateExprFound) {
3960 BinOp = dyn_cast<BinaryOperator>(Second);
3961 IsUpdateExprFound = BinOp && BinOp->getOpcode() == BO_Assign;
3963 if (IsUpdateExprFound && !CurContext->isDependentContext()) {
3968 // { x binop= expr; v = x; }
3969 // { x = x binop expr; v = x; }
3970 // { x = expr binop x; v = x; }
3971 // Check that the second expression has form v = x.
3972 auto *PossibleX = BinOp->getRHS()->IgnoreParenImpCasts();
3973 llvm::FoldingSetNodeID XId, PossibleXId;
3974 Checker.getX()->Profile(XId, Context, /*Canonical=*/true);
3975 PossibleX->Profile(PossibleXId, Context, /*Canonical=*/true);
3976 IsUpdateExprFound = XId == PossibleXId;
3977 if (IsUpdateExprFound) {
3978 V = BinOp->getLHS();
3980 E = Checker.getExpr();
3981 UE = Checker.getUpdateExpr();
3982 IsXLHSInRHSPart = Checker.isXLHSInRHSPart();
3983 IsPostfixUpdate = false;
3987 if (!IsUpdateExprFound) {
3988 // { v = x; x = expr; }
3989 auto *FirstBinOp = dyn_cast<BinaryOperator>(First);
3990 if (!FirstBinOp || FirstBinOp->getOpcode() != BO_Assign) {
3991 ErrorFound = NotAnAssignmentOp;
3992 NoteLoc = ErrorLoc = FirstBinOp ? FirstBinOp->getOperatorLoc()
3993 : First->getLocStart();
3994 NoteRange = ErrorRange = FirstBinOp
3995 ? FirstBinOp->getSourceRange()
3996 : SourceRange(ErrorLoc, ErrorLoc);
3998 auto *SecondBinOp = dyn_cast<BinaryOperator>(Second);
3999 if (!SecondBinOp || SecondBinOp->getOpcode() != BO_Assign) {
4000 ErrorFound = NotAnAssignmentOp;
4001 NoteLoc = ErrorLoc = SecondBinOp ? SecondBinOp->getOperatorLoc()
4002 : Second->getLocStart();
4003 NoteRange = ErrorRange = SecondBinOp
4004 ? SecondBinOp->getSourceRange()
4005 : SourceRange(ErrorLoc, ErrorLoc);
4007 auto *PossibleXRHSInFirst =
4008 FirstBinOp->getRHS()->IgnoreParenImpCasts();
4009 auto *PossibleXLHSInSecond =
4010 SecondBinOp->getLHS()->IgnoreParenImpCasts();
4011 llvm::FoldingSetNodeID X1Id, X2Id;
4012 PossibleXRHSInFirst->Profile(X1Id, Context, /*Canonical=*/true);
4013 PossibleXLHSInSecond->Profile(X2Id, Context,
4014 /*Canonical=*/true);
4015 IsUpdateExprFound = X1Id == X2Id;
4016 if (IsUpdateExprFound) {
4017 V = FirstBinOp->getLHS();
4018 X = SecondBinOp->getLHS();
4019 E = SecondBinOp->getRHS();
4021 IsXLHSInRHSPart = false;
4022 IsPostfixUpdate = true;
4024 ErrorFound = NotASpecificExpression;
4025 ErrorLoc = FirstBinOp->getExprLoc();
4026 ErrorRange = FirstBinOp->getSourceRange();
4027 NoteLoc = SecondBinOp->getLHS()->getExprLoc();
4028 NoteRange = SecondBinOp->getRHS()->getSourceRange();
4034 NoteLoc = ErrorLoc = Body->getLocStart();
4035 NoteRange = ErrorRange =
4036 SourceRange(Body->getLocStart(), Body->getLocStart());
4037 ErrorFound = NotTwoSubstatements;
4040 NoteLoc = ErrorLoc = Body->getLocStart();
4041 NoteRange = ErrorRange =
4042 SourceRange(Body->getLocStart(), Body->getLocStart());
4043 ErrorFound = NotACompoundStatement;
4045 if (ErrorFound != NoError) {
4046 Diag(ErrorLoc, diag::err_omp_atomic_capture_not_compound_statement)
4048 Diag(NoteLoc, diag::note_omp_atomic_capture) << ErrorFound << NoteRange;
4050 } else if (CurContext->isDependentContext()) {
4051 UE = V = E = X = nullptr;
4056 getCurFunction()->setHasBranchProtectedScope();
4058 return OMPAtomicDirective::Create(Context, StartLoc, EndLoc, Clauses, AStmt,
4059 X, V, E, UE, IsXLHSInRHSPart,
4063 StmtResult Sema::ActOnOpenMPTargetDirective(ArrayRef<OMPClause *> Clauses,
4065 SourceLocation StartLoc,
4066 SourceLocation EndLoc) {
4067 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
4069 // OpenMP [2.16, Nesting of Regions]
4070 // If specified, a teams construct must be contained within a target
4071 // construct. That target construct must contain no statements or directives
4072 // outside of the teams construct.
4073 if (DSAStack->hasInnerTeamsRegion()) {
4074 auto S = AStmt->IgnoreContainers(/*IgnoreCaptured*/ true);
4075 bool OMPTeamsFound = true;
4076 if (auto *CS = dyn_cast<CompoundStmt>(S)) {
4077 auto I = CS->body_begin();
4078 while (I != CS->body_end()) {
4079 auto OED = dyn_cast<OMPExecutableDirective>(*I);
4080 if (!OED || !isOpenMPTeamsDirective(OED->getDirectiveKind())) {
4081 OMPTeamsFound = false;
4086 assert(I != CS->body_end() && "Not found statement");
4089 if (!OMPTeamsFound) {
4090 Diag(StartLoc, diag::err_omp_target_contains_not_only_teams);
4091 Diag(DSAStack->getInnerTeamsRegionLoc(),
4092 diag::note_omp_nested_teams_construct_here);
4093 Diag(S->getLocStart(), diag::note_omp_nested_statement_here)
4094 << isa<OMPExecutableDirective>(S);
4099 getCurFunction()->setHasBranchProtectedScope();
4101 return OMPTargetDirective::Create(Context, StartLoc, EndLoc, Clauses, AStmt);
4104 StmtResult Sema::ActOnOpenMPTeamsDirective(ArrayRef<OMPClause *> Clauses,
4105 Stmt *AStmt, SourceLocation StartLoc,
4106 SourceLocation EndLoc) {
4107 assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
4108 CapturedStmt *CS = cast<CapturedStmt>(AStmt);
4109 // 1.2.2 OpenMP Language Terminology
4110 // Structured block - An executable statement with a single entry at the
4111 // top and a single exit at the bottom.
4112 // The point of exit cannot be a branch out of the structured block.
4113 // longjmp() and throw() must not violate the entry/exit criteria.
4114 CS->getCapturedDecl()->setNothrow();
4116 getCurFunction()->setHasBranchProtectedScope();
4118 return OMPTeamsDirective::Create(Context, StartLoc, EndLoc, Clauses, AStmt);
4121 OMPClause *Sema::ActOnOpenMPSingleExprClause(OpenMPClauseKind Kind, Expr *Expr,
4122 SourceLocation StartLoc,
4123 SourceLocation LParenLoc,
4124 SourceLocation EndLoc) {
4125 OMPClause *Res = nullptr;
4128 Res = ActOnOpenMPIfClause(Expr, StartLoc, LParenLoc, EndLoc);
4131 Res = ActOnOpenMPFinalClause(Expr, StartLoc, LParenLoc, EndLoc);
4133 case OMPC_num_threads:
4134 Res = ActOnOpenMPNumThreadsClause(Expr, StartLoc, LParenLoc, EndLoc);
4137 Res = ActOnOpenMPSafelenClause(Expr, StartLoc, LParenLoc, EndLoc);
4140 Res = ActOnOpenMPCollapseClause(Expr, StartLoc, LParenLoc, EndLoc);
4143 case OMPC_proc_bind:
4146 case OMPC_firstprivate:
4147 case OMPC_lastprivate:
4149 case OMPC_reduction:
4153 case OMPC_copyprivate:
4157 case OMPC_mergeable:
4158 case OMPC_threadprivate:
4166 llvm_unreachable("Clause is not allowed.");
4171 OMPClause *Sema::ActOnOpenMPIfClause(Expr *Condition, SourceLocation StartLoc,
4172 SourceLocation LParenLoc,
4173 SourceLocation EndLoc) {
4174 Expr *ValExpr = Condition;
4175 if (!Condition->isValueDependent() && !Condition->isTypeDependent() &&
4176 !Condition->isInstantiationDependent() &&
4177 !Condition->containsUnexpandedParameterPack()) {
4178 ExprResult Val = ActOnBooleanCondition(DSAStack->getCurScope(),
4179 Condition->getExprLoc(), Condition);
4180 if (Val.isInvalid())
4183 ValExpr = Val.get();
4186 return new (Context) OMPIfClause(ValExpr, StartLoc, LParenLoc, EndLoc);
4189 OMPClause *Sema::ActOnOpenMPFinalClause(Expr *Condition,
4190 SourceLocation StartLoc,
4191 SourceLocation LParenLoc,
4192 SourceLocation EndLoc) {
4193 Expr *ValExpr = Condition;
4194 if (!Condition->isValueDependent() && !Condition->isTypeDependent() &&
4195 !Condition->isInstantiationDependent() &&
4196 !Condition->containsUnexpandedParameterPack()) {
4197 ExprResult Val = ActOnBooleanCondition(DSAStack->getCurScope(),
4198 Condition->getExprLoc(), Condition);
4199 if (Val.isInvalid())
4202 ValExpr = Val.get();
4205 return new (Context) OMPFinalClause(ValExpr, StartLoc, LParenLoc, EndLoc);
4207 ExprResult Sema::PerformOpenMPImplicitIntegerConversion(SourceLocation Loc,
4212 class IntConvertDiagnoser : public ICEConvertDiagnoser {
4214 IntConvertDiagnoser()
4215 : ICEConvertDiagnoser(/*AllowScopedEnumerations*/ false, false, true) {}
4216 SemaDiagnosticBuilder diagnoseNotInt(Sema &S, SourceLocation Loc,
4217 QualType T) override {
4218 return S.Diag(Loc, diag::err_omp_not_integral) << T;
4220 SemaDiagnosticBuilder diagnoseIncomplete(Sema &S, SourceLocation Loc,
4221 QualType T) override {
4222 return S.Diag(Loc, diag::err_omp_incomplete_type) << T;
4224 SemaDiagnosticBuilder diagnoseExplicitConv(Sema &S, SourceLocation Loc,
4226 QualType ConvTy) override {
4227 return S.Diag(Loc, diag::err_omp_explicit_conversion) << T << ConvTy;
4229 SemaDiagnosticBuilder noteExplicitConv(Sema &S, CXXConversionDecl *Conv,
4230 QualType ConvTy) override {
4231 return S.Diag(Conv->getLocation(), diag::note_omp_conversion_here)
4232 << ConvTy->isEnumeralType() << ConvTy;
4234 SemaDiagnosticBuilder diagnoseAmbiguous(Sema &S, SourceLocation Loc,
4235 QualType T) override {
4236 return S.Diag(Loc, diag::err_omp_ambiguous_conversion) << T;
4238 SemaDiagnosticBuilder noteAmbiguous(Sema &S, CXXConversionDecl *Conv,
4239 QualType ConvTy) override {
4240 return S.Diag(Conv->getLocation(), diag::note_omp_conversion_here)
4241 << ConvTy->isEnumeralType() << ConvTy;
4243 SemaDiagnosticBuilder diagnoseConversion(Sema &, SourceLocation, QualType,
4244 QualType) override {
4245 llvm_unreachable("conversion functions are permitted");
4248 return PerformContextualImplicitConversion(Loc, Op, ConvertDiagnoser);
4251 OMPClause *Sema::ActOnOpenMPNumThreadsClause(Expr *NumThreads,
4252 SourceLocation StartLoc,
4253 SourceLocation LParenLoc,
4254 SourceLocation EndLoc) {
4255 Expr *ValExpr = NumThreads;
4256 if (!NumThreads->isValueDependent() && !NumThreads->isTypeDependent() &&
4257 !NumThreads->containsUnexpandedParameterPack()) {
4258 SourceLocation NumThreadsLoc = NumThreads->getLocStart();
4260 PerformOpenMPImplicitIntegerConversion(NumThreadsLoc, NumThreads);
4261 if (Val.isInvalid())
4264 ValExpr = Val.get();
4266 // OpenMP [2.5, Restrictions]
4267 // The num_threads expression must evaluate to a positive integer value.
4268 llvm::APSInt Result;
4269 if (ValExpr->isIntegerConstantExpr(Result, Context) && Result.isSigned() &&
4270 !Result.isStrictlyPositive()) {
4271 Diag(NumThreadsLoc, diag::err_omp_negative_expression_in_clause)
4272 << "num_threads" << NumThreads->getSourceRange();
4277 return new (Context)
4278 OMPNumThreadsClause(ValExpr, StartLoc, LParenLoc, EndLoc);
4281 ExprResult Sema::VerifyPositiveIntegerConstantInClause(Expr *E,
4282 OpenMPClauseKind CKind) {
4285 if (E->isValueDependent() || E->isTypeDependent() ||
4286 E->isInstantiationDependent() || E->containsUnexpandedParameterPack())
4288 llvm::APSInt Result;
4289 ExprResult ICE = VerifyIntegerConstantExpression(E, &Result);
4290 if (ICE.isInvalid())
4292 if (!Result.isStrictlyPositive()) {
4293 Diag(E->getExprLoc(), diag::err_omp_negative_expression_in_clause)
4294 << getOpenMPClauseName(CKind) << E->getSourceRange();
4297 if (CKind == OMPC_aligned && !Result.isPowerOf2()) {
4298 Diag(E->getExprLoc(), diag::warn_omp_alignment_not_power_of_two)
4299 << E->getSourceRange();
4302 if (CKind == OMPC_collapse) {
4303 DSAStack->setCollapseNumber(Result.getExtValue());
4308 OMPClause *Sema::ActOnOpenMPSafelenClause(Expr *Len, SourceLocation StartLoc,
4309 SourceLocation LParenLoc,
4310 SourceLocation EndLoc) {
4311 // OpenMP [2.8.1, simd construct, Description]
4312 // The parameter of the safelen clause must be a constant
4313 // positive integer expression.
4314 ExprResult Safelen = VerifyPositiveIntegerConstantInClause(Len, OMPC_safelen);
4315 if (Safelen.isInvalid())
4317 return new (Context)
4318 OMPSafelenClause(Safelen.get(), StartLoc, LParenLoc, EndLoc);
4321 OMPClause *Sema::ActOnOpenMPCollapseClause(Expr *NumForLoops,
4322 SourceLocation StartLoc,
4323 SourceLocation LParenLoc,
4324 SourceLocation EndLoc) {
4325 // OpenMP [2.7.1, loop construct, Description]
4326 // OpenMP [2.8.1, simd construct, Description]
4327 // OpenMP [2.9.6, distribute construct, Description]
4328 // The parameter of the collapse clause must be a constant
4329 // positive integer expression.
4330 ExprResult NumForLoopsResult =
4331 VerifyPositiveIntegerConstantInClause(NumForLoops, OMPC_collapse);
4332 if (NumForLoopsResult.isInvalid())
4334 return new (Context)
4335 OMPCollapseClause(NumForLoopsResult.get(), StartLoc, LParenLoc, EndLoc);
4338 OMPClause *Sema::ActOnOpenMPSimpleClause(
4339 OpenMPClauseKind Kind, unsigned Argument, SourceLocation ArgumentLoc,
4340 SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation EndLoc) {
4341 OMPClause *Res = nullptr;
4345 ActOnOpenMPDefaultClause(static_cast<OpenMPDefaultClauseKind>(Argument),
4346 ArgumentLoc, StartLoc, LParenLoc, EndLoc);
4348 case OMPC_proc_bind:
4349 Res = ActOnOpenMPProcBindClause(
4350 static_cast<OpenMPProcBindClauseKind>(Argument), ArgumentLoc, StartLoc,
4355 case OMPC_num_threads:
4360 case OMPC_firstprivate:
4361 case OMPC_lastprivate:
4363 case OMPC_reduction:
4367 case OMPC_copyprivate:
4371 case OMPC_mergeable:
4372 case OMPC_threadprivate:
4380 llvm_unreachable("Clause is not allowed.");
4385 OMPClause *Sema::ActOnOpenMPDefaultClause(OpenMPDefaultClauseKind Kind,
4386 SourceLocation KindKwLoc,
4387 SourceLocation StartLoc,
4388 SourceLocation LParenLoc,
4389 SourceLocation EndLoc) {
4390 if (Kind == OMPC_DEFAULT_unknown) {
4392 static_assert(OMPC_DEFAULT_unknown > 0,
4393 "OMPC_DEFAULT_unknown not greater than 0");
4394 std::string Sep(", ");
4395 for (unsigned i = 0; i < OMPC_DEFAULT_unknown; ++i) {
4397 Values += getOpenMPSimpleClauseTypeName(OMPC_default, i);
4400 case OMPC_DEFAULT_unknown - 2:
4403 case OMPC_DEFAULT_unknown - 1:
4410 Diag(KindKwLoc, diag::err_omp_unexpected_clause_value)
4411 << Values << getOpenMPClauseName(OMPC_default);
4415 case OMPC_DEFAULT_none:
4416 DSAStack->setDefaultDSANone(KindKwLoc);
4418 case OMPC_DEFAULT_shared:
4419 DSAStack->setDefaultDSAShared(KindKwLoc);
4421 case OMPC_DEFAULT_unknown:
4422 llvm_unreachable("Clause kind is not allowed.");
4425 return new (Context)
4426 OMPDefaultClause(Kind, KindKwLoc, StartLoc, LParenLoc, EndLoc);
4429 OMPClause *Sema::ActOnOpenMPProcBindClause(OpenMPProcBindClauseKind Kind,
4430 SourceLocation KindKwLoc,
4431 SourceLocation StartLoc,
4432 SourceLocation LParenLoc,
4433 SourceLocation EndLoc) {
4434 if (Kind == OMPC_PROC_BIND_unknown) {
4436 std::string Sep(", ");
4437 for (unsigned i = 0; i < OMPC_PROC_BIND_unknown; ++i) {
4439 Values += getOpenMPSimpleClauseTypeName(OMPC_proc_bind, i);
4442 case OMPC_PROC_BIND_unknown - 2:
4445 case OMPC_PROC_BIND_unknown - 1:
4452 Diag(KindKwLoc, diag::err_omp_unexpected_clause_value)
4453 << Values << getOpenMPClauseName(OMPC_proc_bind);
4456 return new (Context)
4457 OMPProcBindClause(Kind, KindKwLoc, StartLoc, LParenLoc, EndLoc);
4460 OMPClause *Sema::ActOnOpenMPSingleExprWithArgClause(
4461 OpenMPClauseKind Kind, unsigned Argument, Expr *Expr,
4462 SourceLocation StartLoc, SourceLocation LParenLoc,
4463 SourceLocation ArgumentLoc, SourceLocation CommaLoc,
4464 SourceLocation EndLoc) {
4465 OMPClause *Res = nullptr;
4468 Res = ActOnOpenMPScheduleClause(
4469 static_cast<OpenMPScheduleClauseKind>(Argument), Expr, StartLoc,
4470 LParenLoc, ArgumentLoc, CommaLoc, EndLoc);
4474 case OMPC_num_threads:
4478 case OMPC_proc_bind:
4480 case OMPC_firstprivate:
4481 case OMPC_lastprivate:
4483 case OMPC_reduction:
4487 case OMPC_copyprivate:
4491 case OMPC_mergeable:
4492 case OMPC_threadprivate:
4500 llvm_unreachable("Clause is not allowed.");
4505 OMPClause *Sema::ActOnOpenMPScheduleClause(
4506 OpenMPScheduleClauseKind Kind, Expr *ChunkSize, SourceLocation StartLoc,
4507 SourceLocation LParenLoc, SourceLocation KindLoc, SourceLocation CommaLoc,
4508 SourceLocation EndLoc) {
4509 if (Kind == OMPC_SCHEDULE_unknown) {
4511 std::string Sep(", ");
4512 for (unsigned i = 0; i < OMPC_SCHEDULE_unknown; ++i) {
4514 Values += getOpenMPSimpleClauseTypeName(OMPC_schedule, i);
4517 case OMPC_SCHEDULE_unknown - 2:
4520 case OMPC_SCHEDULE_unknown - 1:
4527 Diag(KindLoc, diag::err_omp_unexpected_clause_value)
4528 << Values << getOpenMPClauseName(OMPC_schedule);
4531 Expr *ValExpr = ChunkSize;
4532 Expr *HelperValExpr = nullptr;
4534 if (!ChunkSize->isValueDependent() && !ChunkSize->isTypeDependent() &&
4535 !ChunkSize->isInstantiationDependent() &&
4536 !ChunkSize->containsUnexpandedParameterPack()) {
4537 SourceLocation ChunkSizeLoc = ChunkSize->getLocStart();
4539 PerformOpenMPImplicitIntegerConversion(ChunkSizeLoc, ChunkSize);
4540 if (Val.isInvalid())
4543 ValExpr = Val.get();
4545 // OpenMP [2.7.1, Restrictions]
4546 // chunk_size must be a loop invariant integer expression with a positive
4548 llvm::APSInt Result;
4549 if (ValExpr->isIntegerConstantExpr(Result, Context)) {
4550 if (Result.isSigned() && !Result.isStrictlyPositive()) {
4551 Diag(ChunkSizeLoc, diag::err_omp_negative_expression_in_clause)
4552 << "schedule" << ChunkSize->getSourceRange();
4555 } else if (isParallelOrTaskRegion(DSAStack->getCurrentDirective())) {
4556 auto *ImpVar = buildVarDecl(*this, ChunkSize->getExprLoc(),
4557 ChunkSize->getType(), ".chunk.");
4558 auto *ImpVarRef = buildDeclRefExpr(*this, ImpVar, ChunkSize->getType(),
4559 ChunkSize->getExprLoc(),
4560 /*RefersToCapture=*/true);
4561 HelperValExpr = ImpVarRef;
4566 return new (Context) OMPScheduleClause(StartLoc, LParenLoc, KindLoc, CommaLoc,
4567 EndLoc, Kind, ValExpr, HelperValExpr);
4570 OMPClause *Sema::ActOnOpenMPClause(OpenMPClauseKind Kind,
4571 SourceLocation StartLoc,
4572 SourceLocation EndLoc) {
4573 OMPClause *Res = nullptr;
4576 Res = ActOnOpenMPOrderedClause(StartLoc, EndLoc);
4579 Res = ActOnOpenMPNowaitClause(StartLoc, EndLoc);
4582 Res = ActOnOpenMPUntiedClause(StartLoc, EndLoc);
4584 case OMPC_mergeable:
4585 Res = ActOnOpenMPMergeableClause(StartLoc, EndLoc);
4588 Res = ActOnOpenMPReadClause(StartLoc, EndLoc);
4591 Res = ActOnOpenMPWriteClause(StartLoc, EndLoc);
4594 Res = ActOnOpenMPUpdateClause(StartLoc, EndLoc);
4597 Res = ActOnOpenMPCaptureClause(StartLoc, EndLoc);
4600 Res = ActOnOpenMPSeqCstClause(StartLoc, EndLoc);
4604 case OMPC_num_threads:
4609 case OMPC_firstprivate:
4610 case OMPC_lastprivate:
4612 case OMPC_reduction:
4616 case OMPC_copyprivate:
4618 case OMPC_proc_bind:
4619 case OMPC_threadprivate:
4622 llvm_unreachable("Clause is not allowed.");
4627 OMPClause *Sema::ActOnOpenMPOrderedClause(SourceLocation StartLoc,
4628 SourceLocation EndLoc) {
4629 DSAStack->setOrderedRegion();
4630 return new (Context) OMPOrderedClause(StartLoc, EndLoc);
4633 OMPClause *Sema::ActOnOpenMPNowaitClause(SourceLocation StartLoc,
4634 SourceLocation EndLoc) {
4635 return new (Context) OMPNowaitClause(StartLoc, EndLoc);
4638 OMPClause *Sema::ActOnOpenMPUntiedClause(SourceLocation StartLoc,
4639 SourceLocation EndLoc) {
4640 return new (Context) OMPUntiedClause(StartLoc, EndLoc);
4643 OMPClause *Sema::ActOnOpenMPMergeableClause(SourceLocation StartLoc,
4644 SourceLocation EndLoc) {
4645 return new (Context) OMPMergeableClause(StartLoc, EndLoc);
4648 OMPClause *Sema::ActOnOpenMPReadClause(SourceLocation StartLoc,
4649 SourceLocation EndLoc) {
4650 return new (Context) OMPReadClause(StartLoc, EndLoc);
4653 OMPClause *Sema::ActOnOpenMPWriteClause(SourceLocation StartLoc,
4654 SourceLocation EndLoc) {
4655 return new (Context) OMPWriteClause(StartLoc, EndLoc);
4658 OMPClause *Sema::ActOnOpenMPUpdateClause(SourceLocation StartLoc,
4659 SourceLocation EndLoc) {
4660 return new (Context) OMPUpdateClause(StartLoc, EndLoc);
4663 OMPClause *Sema::ActOnOpenMPCaptureClause(SourceLocation StartLoc,
4664 SourceLocation EndLoc) {
4665 return new (Context) OMPCaptureClause(StartLoc, EndLoc);
4668 OMPClause *Sema::ActOnOpenMPSeqCstClause(SourceLocation StartLoc,
4669 SourceLocation EndLoc) {
4670 return new (Context) OMPSeqCstClause(StartLoc, EndLoc);
4673 OMPClause *Sema::ActOnOpenMPVarListClause(
4674 OpenMPClauseKind Kind, ArrayRef<Expr *> VarList, Expr *TailExpr,
4675 SourceLocation StartLoc, SourceLocation LParenLoc, SourceLocation ColonLoc,
4676 SourceLocation EndLoc, CXXScopeSpec &ReductionIdScopeSpec,
4677 const DeclarationNameInfo &ReductionId) {
4678 OMPClause *Res = nullptr;
4681 Res = ActOnOpenMPPrivateClause(VarList, StartLoc, LParenLoc, EndLoc);
4683 case OMPC_firstprivate:
4684 Res = ActOnOpenMPFirstprivateClause(VarList, StartLoc, LParenLoc, EndLoc);
4686 case OMPC_lastprivate:
4687 Res = ActOnOpenMPLastprivateClause(VarList, StartLoc, LParenLoc, EndLoc);
4690 Res = ActOnOpenMPSharedClause(VarList, StartLoc, LParenLoc, EndLoc);
4692 case OMPC_reduction:
4693 Res = ActOnOpenMPReductionClause(VarList, StartLoc, LParenLoc, ColonLoc,
4694 EndLoc, ReductionIdScopeSpec, ReductionId);
4697 Res = ActOnOpenMPLinearClause(VarList, TailExpr, StartLoc, LParenLoc,
4701 Res = ActOnOpenMPAlignedClause(VarList, TailExpr, StartLoc, LParenLoc,
4705 Res = ActOnOpenMPCopyinClause(VarList, StartLoc, LParenLoc, EndLoc);
4707 case OMPC_copyprivate:
4708 Res = ActOnOpenMPCopyprivateClause(VarList, StartLoc, LParenLoc, EndLoc);
4711 Res = ActOnOpenMPFlushClause(VarList, StartLoc, LParenLoc, EndLoc);
4715 case OMPC_num_threads:
4719 case OMPC_proc_bind:
4724 case OMPC_mergeable:
4725 case OMPC_threadprivate:
4732 llvm_unreachable("Clause is not allowed.");
4737 OMPClause *Sema::ActOnOpenMPPrivateClause(ArrayRef<Expr *> VarList,
4738 SourceLocation StartLoc,
4739 SourceLocation LParenLoc,
4740 SourceLocation EndLoc) {
4741 SmallVector<Expr *, 8> Vars;
4742 SmallVector<Expr *, 8> PrivateCopies;
4743 for (auto &RefExpr : VarList) {
4744 assert(RefExpr && "NULL expr in OpenMP private clause.");
4745 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
4746 // It will be analyzed later.
4747 Vars.push_back(RefExpr);
4748 PrivateCopies.push_back(nullptr);
4752 SourceLocation ELoc = RefExpr->getExprLoc();
4753 // OpenMP [2.1, C/C++]
4754 // A list item is a variable name.
4755 // OpenMP [2.9.3.3, Restrictions, p.1]
4756 // A variable that is part of another variable (as an array or
4757 // structure element) cannot appear in a private clause.
4758 DeclRefExpr *DE = dyn_cast_or_null<DeclRefExpr>(RefExpr);
4759 if (!DE || !isa<VarDecl>(DE->getDecl())) {
4760 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
4763 Decl *D = DE->getDecl();
4764 VarDecl *VD = cast<VarDecl>(D);
4766 QualType Type = VD->getType();
4767 if (Type->isDependentType() || Type->isInstantiationDependentType()) {
4768 // It will be analyzed later.
4770 PrivateCopies.push_back(nullptr);
4774 // OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
4775 // A variable that appears in a private clause must not have an incomplete
4776 // type or a reference type.
4777 if (RequireCompleteType(ELoc, Type,
4778 diag::err_omp_private_incomplete_type)) {
4781 if (Type->isReferenceType()) {
4782 Diag(ELoc, diag::err_omp_clause_ref_type_arg)
4783 << getOpenMPClauseName(OMPC_private) << Type;
4785 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
4786 Diag(VD->getLocation(),
4787 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
4792 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
4794 // Variables with the predetermined data-sharing attributes may not be
4795 // listed in data-sharing attributes clauses, except for the cases
4796 // listed below. For these exceptions only, listing a predetermined
4797 // variable in a data-sharing attribute clause is allowed and overrides
4798 // the variable's predetermined data-sharing attributes.
4799 DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD, false);
4800 if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_private) {
4801 Diag(ELoc, diag::err_omp_wrong_dsa) << getOpenMPClauseName(DVar.CKind)
4802 << getOpenMPClauseName(OMPC_private);
4803 ReportOriginalDSA(*this, DSAStack, VD, DVar);
4807 // Variably modified types are not supported for tasks.
4808 if (!Type->isAnyPointerType() && Type->isVariablyModifiedType() &&
4809 DSAStack->getCurrentDirective() == OMPD_task) {
4810 Diag(ELoc, diag::err_omp_variably_modified_type_not_supported)
4811 << getOpenMPClauseName(OMPC_private) << Type
4812 << getOpenMPDirectiveName(DSAStack->getCurrentDirective());
4814 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
4815 Diag(VD->getLocation(),
4816 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
4821 // OpenMP [2.9.3.3, Restrictions, C/C++, p.1]
4822 // A variable of class type (or array thereof) that appears in a private
4823 // clause requires an accessible, unambiguous default constructor for the
4825 // Generate helper private variable and initialize it with the default
4826 // value. The address of the original variable is replaced by the address of
4827 // the new private variable in CodeGen. This new variable is not added to
4828 // IdResolver, so the code in the OpenMP region uses original variable for
4829 // proper diagnostics.
4830 Type = Type.getUnqualifiedType();
4831 auto VDPrivate = buildVarDecl(*this, DE->getExprLoc(), Type, VD->getName());
4832 ActOnUninitializedDecl(VDPrivate, /*TypeMayContainAuto=*/false);
4833 if (VDPrivate->isInvalidDecl())
4835 auto VDPrivateRefExpr = buildDeclRefExpr(
4836 *this, VDPrivate, DE->getType().getUnqualifiedType(), DE->getExprLoc());
4838 DSAStack->addDSA(VD, DE, OMPC_private);
4840 PrivateCopies.push_back(VDPrivateRefExpr);
4846 return OMPPrivateClause::Create(Context, StartLoc, LParenLoc, EndLoc, Vars,
4851 class DiagsUninitializedSeveretyRAII {
4853 DiagnosticsEngine &Diags;
4854 SourceLocation SavedLoc;
4858 DiagsUninitializedSeveretyRAII(DiagnosticsEngine &Diags, SourceLocation Loc,
4860 : Diags(Diags), SavedLoc(Loc), IsIgnored(IsIgnored) {
4862 Diags.setSeverity(/*Diag*/ diag::warn_uninit_self_reference_in_init,
4863 /*Map*/ diag::Severity::Ignored, Loc);
4866 ~DiagsUninitializedSeveretyRAII() {
4868 Diags.popMappings(SavedLoc);
4873 OMPClause *Sema::ActOnOpenMPFirstprivateClause(ArrayRef<Expr *> VarList,
4874 SourceLocation StartLoc,
4875 SourceLocation LParenLoc,
4876 SourceLocation EndLoc) {
4877 SmallVector<Expr *, 8> Vars;
4878 SmallVector<Expr *, 8> PrivateCopies;
4879 SmallVector<Expr *, 8> Inits;
4880 bool IsImplicitClause =
4881 StartLoc.isInvalid() && LParenLoc.isInvalid() && EndLoc.isInvalid();
4882 auto ImplicitClauseLoc = DSAStack->getConstructLoc();
4884 for (auto &RefExpr : VarList) {
4885 assert(RefExpr && "NULL expr in OpenMP firstprivate clause.");
4886 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
4887 // It will be analyzed later.
4888 Vars.push_back(RefExpr);
4889 PrivateCopies.push_back(nullptr);
4890 Inits.push_back(nullptr);
4894 SourceLocation ELoc =
4895 IsImplicitClause ? ImplicitClauseLoc : RefExpr->getExprLoc();
4896 // OpenMP [2.1, C/C++]
4897 // A list item is a variable name.
4898 // OpenMP [2.9.3.3, Restrictions, p.1]
4899 // A variable that is part of another variable (as an array or
4900 // structure element) cannot appear in a private clause.
4901 DeclRefExpr *DE = dyn_cast_or_null<DeclRefExpr>(RefExpr);
4902 if (!DE || !isa<VarDecl>(DE->getDecl())) {
4903 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
4906 Decl *D = DE->getDecl();
4907 VarDecl *VD = cast<VarDecl>(D);
4909 QualType Type = VD->getType();
4910 if (Type->isDependentType() || Type->isInstantiationDependentType()) {
4911 // It will be analyzed later.
4913 PrivateCopies.push_back(nullptr);
4914 Inits.push_back(nullptr);
4918 // OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
4919 // A variable that appears in a private clause must not have an incomplete
4920 // type or a reference type.
4921 if (RequireCompleteType(ELoc, Type,
4922 diag::err_omp_firstprivate_incomplete_type)) {
4925 if (Type->isReferenceType()) {
4926 if (IsImplicitClause) {
4927 Diag(ImplicitClauseLoc,
4928 diag::err_omp_task_predetermined_firstprivate_ref_type_arg)
4930 Diag(RefExpr->getExprLoc(), diag::note_used_here);
4932 Diag(ELoc, diag::err_omp_clause_ref_type_arg)
4933 << getOpenMPClauseName(OMPC_firstprivate) << Type;
4936 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
4937 Diag(VD->getLocation(),
4938 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
4943 // OpenMP [2.9.3.4, Restrictions, C/C++, p.1]
4944 // A variable of class type (or array thereof) that appears in a private
4945 // clause requires an accessible, unambiguous copy constructor for the
4947 auto ElemType = Context.getBaseElementType(Type).getNonReferenceType();
4949 // If an implicit firstprivate variable found it was checked already.
4950 if (!IsImplicitClause) {
4951 DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD, false);
4952 bool IsConstant = ElemType.isConstant(Context);
4953 // OpenMP [2.4.13, Data-sharing Attribute Clauses]
4954 // A list item that specifies a given variable may not appear in more
4955 // than one clause on the same directive, except that a variable may be
4956 // specified in both firstprivate and lastprivate clauses.
4957 if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_firstprivate &&
4958 DVar.CKind != OMPC_lastprivate && DVar.RefExpr) {
4959 Diag(ELoc, diag::err_omp_wrong_dsa)
4960 << getOpenMPClauseName(DVar.CKind)
4961 << getOpenMPClauseName(OMPC_firstprivate);
4962 ReportOriginalDSA(*this, DSAStack, VD, DVar);
4966 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
4968 // Variables with the predetermined data-sharing attributes may not be
4969 // listed in data-sharing attributes clauses, except for the cases
4970 // listed below. For these exceptions only, listing a predetermined
4971 // variable in a data-sharing attribute clause is allowed and overrides
4972 // the variable's predetermined data-sharing attributes.
4973 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
4974 // in a Construct, C/C++, p.2]
4975 // Variables with const-qualified type having no mutable member may be
4976 // listed in a firstprivate clause, even if they are static data members.
4977 if (!(IsConstant || VD->isStaticDataMember()) && !DVar.RefExpr &&
4978 DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_shared) {
4979 Diag(ELoc, diag::err_omp_wrong_dsa)
4980 << getOpenMPClauseName(DVar.CKind)
4981 << getOpenMPClauseName(OMPC_firstprivate);
4982 ReportOriginalDSA(*this, DSAStack, VD, DVar);
4986 OpenMPDirectiveKind CurrDir = DSAStack->getCurrentDirective();
4987 // OpenMP [2.9.3.4, Restrictions, p.2]
4988 // A list item that is private within a parallel region must not appear
4989 // in a firstprivate clause on a worksharing construct if any of the
4990 // worksharing regions arising from the worksharing construct ever bind
4991 // to any of the parallel regions arising from the parallel construct.
4992 if (isOpenMPWorksharingDirective(CurrDir) &&
4993 !isOpenMPParallelDirective(CurrDir)) {
4994 DVar = DSAStack->getImplicitDSA(VD, true);
4995 if (DVar.CKind != OMPC_shared &&
4996 (isOpenMPParallelDirective(DVar.DKind) ||
4997 DVar.DKind == OMPD_unknown)) {
4998 Diag(ELoc, diag::err_omp_required_access)
4999 << getOpenMPClauseName(OMPC_firstprivate)
5000 << getOpenMPClauseName(OMPC_shared);
5001 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5005 // OpenMP [2.9.3.4, Restrictions, p.3]
5006 // A list item that appears in a reduction clause of a parallel construct
5007 // must not appear in a firstprivate clause on a worksharing or task
5008 // construct if any of the worksharing or task regions arising from the
5009 // worksharing or task construct ever bind to any of the parallel regions
5010 // arising from the parallel construct.
5011 // OpenMP [2.9.3.4, Restrictions, p.4]
5012 // A list item that appears in a reduction clause in worksharing
5013 // construct must not appear in a firstprivate clause in a task construct
5014 // encountered during execution of any of the worksharing regions arising
5015 // from the worksharing construct.
5016 if (CurrDir == OMPD_task) {
5018 DSAStack->hasInnermostDSA(VD, MatchesAnyClause(OMPC_reduction),
5019 [](OpenMPDirectiveKind K) -> bool {
5020 return isOpenMPParallelDirective(K) ||
5021 isOpenMPWorksharingDirective(K);
5024 if (DVar.CKind == OMPC_reduction &&
5025 (isOpenMPParallelDirective(DVar.DKind) ||
5026 isOpenMPWorksharingDirective(DVar.DKind))) {
5027 Diag(ELoc, diag::err_omp_parallel_reduction_in_task_firstprivate)
5028 << getOpenMPDirectiveName(DVar.DKind);
5029 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5035 // Variably modified types are not supported for tasks.
5036 if (!Type->isAnyPointerType() && Type->isVariablyModifiedType() &&
5037 DSAStack->getCurrentDirective() == OMPD_task) {
5038 Diag(ELoc, diag::err_omp_variably_modified_type_not_supported)
5039 << getOpenMPClauseName(OMPC_firstprivate) << Type
5040 << getOpenMPDirectiveName(DSAStack->getCurrentDirective());
5042 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5043 Diag(VD->getLocation(),
5044 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5049 Type = Type.getUnqualifiedType();
5050 auto VDPrivate = buildVarDecl(*this, ELoc, Type, VD->getName());
5051 // Generate helper private variable and initialize it with the value of the
5052 // original variable. The address of the original variable is replaced by
5053 // the address of the new private variable in the CodeGen. This new variable
5054 // is not added to IdResolver, so the code in the OpenMP region uses
5055 // original variable for proper diagnostics and variable capturing.
5056 Expr *VDInitRefExpr = nullptr;
5057 // For arrays generate initializer for single element and replace it by the
5058 // original array element in CodeGen.
5059 if (Type->isArrayType()) {
5061 buildVarDecl(*this, DE->getExprLoc(), ElemType, VD->getName());
5062 VDInitRefExpr = buildDeclRefExpr(*this, VDInit, ElemType, ELoc);
5063 auto Init = DefaultLvalueConversion(VDInitRefExpr).get();
5064 ElemType = ElemType.getUnqualifiedType();
5065 auto *VDInitTemp = buildVarDecl(*this, DE->getLocStart(), ElemType,
5066 ".firstprivate.temp");
5067 InitializedEntity Entity =
5068 InitializedEntity::InitializeVariable(VDInitTemp);
5069 InitializationKind Kind = InitializationKind::CreateCopy(ELoc, ELoc);
5071 InitializationSequence InitSeq(*this, Entity, Kind, Init);
5072 ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Init);
5073 if (Result.isInvalid())
5074 VDPrivate->setInvalidDecl();
5076 VDPrivate->setInit(Result.getAs<Expr>());
5079 buildVarDecl(*this, DE->getLocStart(), Type, ".firstprivate.temp");
5081 buildDeclRefExpr(*this, VDInit, DE->getType(), DE->getExprLoc());
5082 AddInitializerToDecl(VDPrivate,
5083 DefaultLvalueConversion(VDInitRefExpr).get(),
5084 /*DirectInit=*/false, /*TypeMayContainAuto=*/false);
5086 if (VDPrivate->isInvalidDecl()) {
5087 if (IsImplicitClause) {
5088 Diag(DE->getExprLoc(),
5089 diag::note_omp_task_predetermined_firstprivate_here);
5093 CurContext->addDecl(VDPrivate);
5094 auto VDPrivateRefExpr = buildDeclRefExpr(
5095 *this, VDPrivate, DE->getType().getUnqualifiedType(), DE->getExprLoc());
5096 DSAStack->addDSA(VD, DE, OMPC_firstprivate);
5098 PrivateCopies.push_back(VDPrivateRefExpr);
5099 Inits.push_back(VDInitRefExpr);
5105 return OMPFirstprivateClause::Create(Context, StartLoc, LParenLoc, EndLoc,
5106 Vars, PrivateCopies, Inits);
5109 OMPClause *Sema::ActOnOpenMPLastprivateClause(ArrayRef<Expr *> VarList,
5110 SourceLocation StartLoc,
5111 SourceLocation LParenLoc,
5112 SourceLocation EndLoc) {
5113 SmallVector<Expr *, 8> Vars;
5114 SmallVector<Expr *, 8> SrcExprs;
5115 SmallVector<Expr *, 8> DstExprs;
5116 SmallVector<Expr *, 8> AssignmentOps;
5117 for (auto &RefExpr : VarList) {
5118 assert(RefExpr && "NULL expr in OpenMP lastprivate clause.");
5119 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
5120 // It will be analyzed later.
5121 Vars.push_back(RefExpr);
5122 SrcExprs.push_back(nullptr);
5123 DstExprs.push_back(nullptr);
5124 AssignmentOps.push_back(nullptr);
5128 SourceLocation ELoc = RefExpr->getExprLoc();
5129 // OpenMP [2.1, C/C++]
5130 // A list item is a variable name.
5131 // OpenMP [2.14.3.5, Restrictions, p.1]
5132 // A variable that is part of another variable (as an array or structure
5133 // element) cannot appear in a lastprivate clause.
5134 DeclRefExpr *DE = dyn_cast_or_null<DeclRefExpr>(RefExpr);
5135 if (!DE || !isa<VarDecl>(DE->getDecl())) {
5136 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
5139 Decl *D = DE->getDecl();
5140 VarDecl *VD = cast<VarDecl>(D);
5142 QualType Type = VD->getType();
5143 if (Type->isDependentType() || Type->isInstantiationDependentType()) {
5144 // It will be analyzed later.
5146 SrcExprs.push_back(nullptr);
5147 DstExprs.push_back(nullptr);
5148 AssignmentOps.push_back(nullptr);
5152 // OpenMP [2.14.3.5, Restrictions, C/C++, p.2]
5153 // A variable that appears in a lastprivate clause must not have an
5154 // incomplete type or a reference type.
5155 if (RequireCompleteType(ELoc, Type,
5156 diag::err_omp_lastprivate_incomplete_type)) {
5159 if (Type->isReferenceType()) {
5160 Diag(ELoc, diag::err_omp_clause_ref_type_arg)
5161 << getOpenMPClauseName(OMPC_lastprivate) << Type;
5163 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5164 Diag(VD->getLocation(),
5165 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5170 // OpenMP [2.14.1.1, Data-sharing Attribute Rules for Variables Referenced
5172 // Variables with the predetermined data-sharing attributes may not be
5173 // listed in data-sharing attributes clauses, except for the cases
5175 DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD, false);
5176 if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_lastprivate &&
5177 DVar.CKind != OMPC_firstprivate &&
5178 (DVar.CKind != OMPC_private || DVar.RefExpr != nullptr)) {
5179 Diag(ELoc, diag::err_omp_wrong_dsa)
5180 << getOpenMPClauseName(DVar.CKind)
5181 << getOpenMPClauseName(OMPC_lastprivate);
5182 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5186 OpenMPDirectiveKind CurrDir = DSAStack->getCurrentDirective();
5187 // OpenMP [2.14.3.5, Restrictions, p.2]
5188 // A list item that is private within a parallel region, or that appears in
5189 // the reduction clause of a parallel construct, must not appear in a
5190 // lastprivate clause on a worksharing construct if any of the corresponding
5191 // worksharing regions ever binds to any of the corresponding parallel
5193 DSAStackTy::DSAVarData TopDVar = DVar;
5194 if (isOpenMPWorksharingDirective(CurrDir) &&
5195 !isOpenMPParallelDirective(CurrDir)) {
5196 DVar = DSAStack->getImplicitDSA(VD, true);
5197 if (DVar.CKind != OMPC_shared) {
5198 Diag(ELoc, diag::err_omp_required_access)
5199 << getOpenMPClauseName(OMPC_lastprivate)
5200 << getOpenMPClauseName(OMPC_shared);
5201 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5205 // OpenMP [2.14.3.5, Restrictions, C++, p.1,2]
5206 // A variable of class type (or array thereof) that appears in a
5207 // lastprivate clause requires an accessible, unambiguous default
5208 // constructor for the class type, unless the list item is also specified
5209 // in a firstprivate clause.
5210 // A variable of class type (or array thereof) that appears in a
5211 // lastprivate clause requires an accessible, unambiguous copy assignment
5212 // operator for the class type.
5213 Type = Context.getBaseElementType(Type).getNonReferenceType();
5214 auto *SrcVD = buildVarDecl(*this, DE->getLocStart(),
5215 Type.getUnqualifiedType(), ".lastprivate.src");
5216 auto *PseudoSrcExpr = buildDeclRefExpr(
5217 *this, SrcVD, Type.getUnqualifiedType(), DE->getExprLoc());
5219 buildVarDecl(*this, DE->getLocStart(), Type, ".lastprivate.dst");
5220 auto *PseudoDstExpr =
5221 buildDeclRefExpr(*this, DstVD, Type, DE->getExprLoc());
5222 // For arrays generate assignment operation for single element and replace
5223 // it by the original array element in CodeGen.
5224 auto AssignmentOp = BuildBinOp(/*S=*/nullptr, DE->getExprLoc(), BO_Assign,
5225 PseudoDstExpr, PseudoSrcExpr);
5226 if (AssignmentOp.isInvalid())
5228 AssignmentOp = ActOnFinishFullExpr(AssignmentOp.get(), DE->getExprLoc(),
5229 /*DiscardedValue=*/true);
5230 if (AssignmentOp.isInvalid())
5233 if (TopDVar.CKind != OMPC_firstprivate)
5234 DSAStack->addDSA(VD, DE, OMPC_lastprivate);
5236 SrcExprs.push_back(PseudoSrcExpr);
5237 DstExprs.push_back(PseudoDstExpr);
5238 AssignmentOps.push_back(AssignmentOp.get());
5244 return OMPLastprivateClause::Create(Context, StartLoc, LParenLoc, EndLoc,
5245 Vars, SrcExprs, DstExprs, AssignmentOps);
5248 OMPClause *Sema::ActOnOpenMPSharedClause(ArrayRef<Expr *> VarList,
5249 SourceLocation StartLoc,
5250 SourceLocation LParenLoc,
5251 SourceLocation EndLoc) {
5252 SmallVector<Expr *, 8> Vars;
5253 for (auto &RefExpr : VarList) {
5254 assert(RefExpr && "NULL expr in OpenMP shared clause.");
5255 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
5256 // It will be analyzed later.
5257 Vars.push_back(RefExpr);
5261 SourceLocation ELoc = RefExpr->getExprLoc();
5262 // OpenMP [2.1, C/C++]
5263 // A list item is a variable name.
5264 // OpenMP [2.14.3.2, Restrictions, p.1]
5265 // A variable that is part of another variable (as an array or structure
5266 // element) cannot appear in a shared unless it is a static data member
5268 DeclRefExpr *DE = dyn_cast<DeclRefExpr>(RefExpr);
5269 if (!DE || !isa<VarDecl>(DE->getDecl())) {
5270 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
5273 Decl *D = DE->getDecl();
5274 VarDecl *VD = cast<VarDecl>(D);
5276 QualType Type = VD->getType();
5277 if (Type->isDependentType() || Type->isInstantiationDependentType()) {
5278 // It will be analyzed later.
5283 // OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
5285 // Variables with the predetermined data-sharing attributes may not be
5286 // listed in data-sharing attributes clauses, except for the cases
5287 // listed below. For these exceptions only, listing a predetermined
5288 // variable in a data-sharing attribute clause is allowed and overrides
5289 // the variable's predetermined data-sharing attributes.
5290 DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD, false);
5291 if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_shared &&
5293 Diag(ELoc, diag::err_omp_wrong_dsa) << getOpenMPClauseName(DVar.CKind)
5294 << getOpenMPClauseName(OMPC_shared);
5295 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5299 DSAStack->addDSA(VD, DE, OMPC_shared);
5306 return OMPSharedClause::Create(Context, StartLoc, LParenLoc, EndLoc, Vars);
5310 class DSARefChecker : public StmtVisitor<DSARefChecker, bool> {
5314 bool VisitDeclRefExpr(DeclRefExpr *E) {
5315 if (VarDecl *VD = dyn_cast<VarDecl>(E->getDecl())) {
5316 DSAStackTy::DSAVarData DVar = Stack->getTopDSA(VD, false);
5317 if (DVar.CKind == OMPC_shared && !DVar.RefExpr)
5319 if (DVar.CKind != OMPC_unknown)
5321 DSAStackTy::DSAVarData DVarPrivate =
5322 Stack->hasDSA(VD, isOpenMPPrivate, MatchesAlways(), false);
5323 if (DVarPrivate.CKind != OMPC_unknown)
5329 bool VisitStmt(Stmt *S) {
5330 for (auto Child : S->children()) {
5331 if (Child && Visit(Child))
5336 explicit DSARefChecker(DSAStackTy *S) : Stack(S) {}
5340 OMPClause *Sema::ActOnOpenMPReductionClause(
5341 ArrayRef<Expr *> VarList, SourceLocation StartLoc, SourceLocation LParenLoc,
5342 SourceLocation ColonLoc, SourceLocation EndLoc,
5343 CXXScopeSpec &ReductionIdScopeSpec,
5344 const DeclarationNameInfo &ReductionId) {
5345 // TODO: Allow scope specification search when 'declare reduction' is
5347 assert(ReductionIdScopeSpec.isEmpty() &&
5348 "No support for scoped reduction identifiers yet.");
5350 auto DN = ReductionId.getName();
5351 auto OOK = DN.getCXXOverloadedOperator();
5352 BinaryOperatorKind BOK = BO_Comma;
5354 // OpenMP [2.14.3.6, reduction clause]
5356 // reduction-identifier is either an identifier or one of the following
5357 // operators: +, -, *, &, |, ^, && and ||
5359 // reduction-identifier is either an id-expression or one of the following
5360 // operators: +, -, *, &, |, ^, && and ||
5361 // FIXME: Only 'min' and 'max' identifiers are supported for now.
5388 case OO_Array_Delete:
5397 case OO_GreaterEqual:
5402 case OO_PercentEqual:
5407 case OO_GreaterGreater:
5408 case OO_LessLessEqual:
5409 case OO_GreaterGreaterEqual:
5411 case OO_ExclaimEqual:
5419 case OO_Conditional:
5420 case NUM_OVERLOADED_OPERATORS:
5421 llvm_unreachable("Unexpected reduction identifier");
5423 if (auto II = DN.getAsIdentifierInfo()) {
5424 if (II->isStr("max"))
5426 else if (II->isStr("min"))
5431 SourceRange ReductionIdRange;
5432 if (ReductionIdScopeSpec.isValid()) {
5433 ReductionIdRange.setBegin(ReductionIdScopeSpec.getBeginLoc());
5435 ReductionIdRange.setEnd(ReductionId.getEndLoc());
5436 if (BOK == BO_Comma) {
5437 // Not allowed reduction identifier is found.
5438 Diag(ReductionId.getLocStart(), diag::err_omp_unknown_reduction_identifier)
5439 << ReductionIdRange;
5443 SmallVector<Expr *, 8> Vars;
5444 SmallVector<Expr *, 8> LHSs;
5445 SmallVector<Expr *, 8> RHSs;
5446 SmallVector<Expr *, 8> ReductionOps;
5447 for (auto RefExpr : VarList) {
5448 assert(RefExpr && "nullptr expr in OpenMP reduction clause.");
5449 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
5450 // It will be analyzed later.
5451 Vars.push_back(RefExpr);
5452 LHSs.push_back(nullptr);
5453 RHSs.push_back(nullptr);
5454 ReductionOps.push_back(nullptr);
5458 if (RefExpr->isTypeDependent() || RefExpr->isValueDependent() ||
5459 RefExpr->isInstantiationDependent() ||
5460 RefExpr->containsUnexpandedParameterPack()) {
5461 // It will be analyzed later.
5462 Vars.push_back(RefExpr);
5463 LHSs.push_back(nullptr);
5464 RHSs.push_back(nullptr);
5465 ReductionOps.push_back(nullptr);
5469 auto ELoc = RefExpr->getExprLoc();
5470 auto ERange = RefExpr->getSourceRange();
5471 // OpenMP [2.1, C/C++]
5472 // A list item is a variable or array section, subject to the restrictions
5473 // specified in Section 2.4 on page 42 and in each of the sections
5474 // describing clauses and directives for which a list appears.
5475 // OpenMP [2.14.3.3, Restrictions, p.1]
5476 // A variable that is part of another variable (as an array or
5477 // structure element) cannot appear in a private clause.
5478 auto DE = dyn_cast<DeclRefExpr>(RefExpr);
5479 if (!DE || !isa<VarDecl>(DE->getDecl())) {
5480 Diag(ELoc, diag::err_omp_expected_var_name) << ERange;
5483 auto D = DE->getDecl();
5484 auto VD = cast<VarDecl>(D);
5485 auto Type = VD->getType();
5486 // OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
5487 // A variable that appears in a private clause must not have an incomplete
5488 // type or a reference type.
5489 if (RequireCompleteType(ELoc, Type,
5490 diag::err_omp_reduction_incomplete_type))
5492 // OpenMP [2.14.3.6, reduction clause, Restrictions]
5493 // Arrays may not appear in a reduction clause.
5494 if (Type.getNonReferenceType()->isArrayType()) {
5495 Diag(ELoc, diag::err_omp_reduction_type_array) << Type << ERange;
5497 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5498 Diag(VD->getLocation(),
5499 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5503 // OpenMP [2.14.3.6, reduction clause, Restrictions]
5504 // A list item that appears in a reduction clause must not be
5506 if (Type.getNonReferenceType().isConstant(Context)) {
5507 Diag(ELoc, diag::err_omp_const_variable)
5508 << getOpenMPClauseName(OMPC_reduction) << Type << ERange;
5510 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5511 Diag(VD->getLocation(),
5512 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5516 // OpenMP [2.9.3.6, Restrictions, C/C++, p.4]
5517 // If a list-item is a reference type then it must bind to the same object
5518 // for all threads of the team.
5519 VarDecl *VDDef = VD->getDefinition();
5520 if (Type->isReferenceType() && VDDef) {
5521 DSARefChecker Check(DSAStack);
5522 if (Check.Visit(VDDef->getInit())) {
5523 Diag(ELoc, diag::err_omp_reduction_ref_type_arg) << ERange;
5524 Diag(VDDef->getLocation(), diag::note_defined_here) << VDDef;
5528 // OpenMP [2.14.3.6, reduction clause, Restrictions]
5529 // The type of a list item that appears in a reduction clause must be valid
5530 // for the reduction-identifier. For a max or min reduction in C, the type
5531 // of the list item must be an allowed arithmetic data type: char, int,
5532 // float, double, or _Bool, possibly modified with long, short, signed, or
5533 // unsigned. For a max or min reduction in C++, the type of the list item
5534 // must be an allowed arithmetic data type: char, wchar_t, int, float,
5535 // double, or bool, possibly modified with long, short, signed, or unsigned.
5536 if ((BOK == BO_GT || BOK == BO_LT) &&
5537 !(Type->isScalarType() ||
5538 (getLangOpts().CPlusPlus && Type->isArithmeticType()))) {
5539 Diag(ELoc, diag::err_omp_clause_not_arithmetic_type_arg)
5540 << getLangOpts().CPlusPlus;
5542 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5543 Diag(VD->getLocation(),
5544 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5548 if ((BOK == BO_OrAssign || BOK == BO_AndAssign || BOK == BO_XorAssign) &&
5549 !getLangOpts().CPlusPlus && Type->isFloatingType()) {
5550 Diag(ELoc, diag::err_omp_clause_floating_type_arg);
5552 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5553 Diag(VD->getLocation(),
5554 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5558 // OpenMP [2.14.1.1, Data-sharing Attribute Rules for Variables Referenced
5560 // Variables with the predetermined data-sharing attributes may not be
5561 // listed in data-sharing attributes clauses, except for the cases
5562 // listed below. For these exceptions only, listing a predetermined
5563 // variable in a data-sharing attribute clause is allowed and overrides
5564 // the variable's predetermined data-sharing attributes.
5565 // OpenMP [2.14.3.6, Restrictions, p.3]
5566 // Any number of reduction clauses can be specified on the directive,
5567 // but a list item can appear only once in the reduction clauses for that
5569 DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD, false);
5570 if (DVar.CKind == OMPC_reduction) {
5571 Diag(ELoc, diag::err_omp_once_referenced)
5572 << getOpenMPClauseName(OMPC_reduction);
5574 Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_referenced);
5576 } else if (DVar.CKind != OMPC_unknown) {
5577 Diag(ELoc, diag::err_omp_wrong_dsa)
5578 << getOpenMPClauseName(DVar.CKind)
5579 << getOpenMPClauseName(OMPC_reduction);
5580 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5584 // OpenMP [2.14.3.6, Restrictions, p.1]
5585 // A list item that appears in a reduction clause of a worksharing
5586 // construct must be shared in the parallel regions to which any of the
5587 // worksharing regions arising from the worksharing construct bind.
5588 OpenMPDirectiveKind CurrDir = DSAStack->getCurrentDirective();
5589 if (isOpenMPWorksharingDirective(CurrDir) &&
5590 !isOpenMPParallelDirective(CurrDir)) {
5591 DVar = DSAStack->getImplicitDSA(VD, true);
5592 if (DVar.CKind != OMPC_shared) {
5593 Diag(ELoc, diag::err_omp_required_access)
5594 << getOpenMPClauseName(OMPC_reduction)
5595 << getOpenMPClauseName(OMPC_shared);
5596 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5600 Type = Type.getNonLValueExprType(Context).getUnqualifiedType();
5601 auto *LHSVD = buildVarDecl(*this, ELoc, Type, ".reduction.lhs");
5602 auto *RHSVD = buildVarDecl(*this, ELoc, Type, VD->getName());
5603 // Add initializer for private variable.
5604 Expr *Init = nullptr;
5610 // '+', '-', '^', '|', '||' reduction ops - initializer is '0'.
5611 if (Type->isScalarType() || Type->isAnyComplexType()) {
5612 Init = ActOnIntegerConstant(ELoc, /*Val=*/0).get();
5617 if (Type->isScalarType() || Type->isAnyComplexType()) {
5618 // '*' and '&&' reduction ops - initializer is '1'.
5619 Init = ActOnIntegerConstant(ELoc, /*Val=*/1).get();
5623 // '&' reduction op - initializer is '~0'.
5624 QualType OrigType = Type;
5625 if (auto *ComplexTy = OrigType->getAs<ComplexType>()) {
5626 Type = ComplexTy->getElementType();
5628 if (Type->isRealFloatingType()) {
5629 llvm::APFloat InitValue =
5630 llvm::APFloat::getAllOnesValue(Context.getTypeSize(Type),
5632 Init = FloatingLiteral::Create(Context, InitValue, /*isexact=*/true,
5634 } else if (Type->isScalarType()) {
5635 auto Size = Context.getTypeSize(Type);
5636 QualType IntTy = Context.getIntTypeForBitwidth(Size, /*Signed=*/0);
5637 llvm::APInt InitValue = llvm::APInt::getAllOnesValue(Size);
5638 Init = IntegerLiteral::Create(Context, InitValue, IntTy, ELoc);
5640 if (Init && OrigType->isAnyComplexType()) {
5641 // Init = 0xFFFF + 0xFFFFi;
5642 auto *Im = new (Context) ImaginaryLiteral(Init, OrigType);
5643 Init = CreateBuiltinBinOp(ELoc, BO_Add, Init, Im).get();
5650 // 'min' reduction op - initializer is 'Largest representable number in
5651 // the reduction list item type'.
5652 // 'max' reduction op - initializer is 'Least representable number in
5653 // the reduction list item type'.
5654 if (Type->isIntegerType() || Type->isPointerType()) {
5655 bool IsSigned = Type->hasSignedIntegerRepresentation();
5656 auto Size = Context.getTypeSize(Type);
5658 Context.getIntTypeForBitwidth(Size, /*Signed=*/IsSigned);
5659 llvm::APInt InitValue =
5661 ? IsSigned ? llvm::APInt::getSignedMinValue(Size)
5662 : llvm::APInt::getMinValue(Size)
5663 : IsSigned ? llvm::APInt::getSignedMaxValue(Size)
5664 : llvm::APInt::getMaxValue(Size);
5665 Init = IntegerLiteral::Create(Context, InitValue, IntTy, ELoc);
5666 if (Type->isPointerType()) {
5667 // Cast to pointer type.
5668 auto CastExpr = BuildCStyleCastExpr(
5669 SourceLocation(), Context.getTrivialTypeSourceInfo(Type, ELoc),
5670 SourceLocation(), Init);
5671 if (CastExpr.isInvalid())
5673 Init = CastExpr.get();
5675 } else if (Type->isRealFloatingType()) {
5676 llvm::APFloat InitValue = llvm::APFloat::getLargest(
5677 Context.getFloatTypeSemantics(Type), BOK != BO_LT);
5678 Init = FloatingLiteral::Create(Context, InitValue, /*isexact=*/true,
5706 llvm_unreachable("Unexpected reduction operation");
5709 AddInitializerToDecl(RHSVD, Init, /*DirectInit=*/false,
5710 /*TypeMayContainAuto=*/false);
5712 ActOnUninitializedDecl(RHSVD, /*TypeMayContainAuto=*/false);
5714 if (!RHSVD->hasInit()) {
5715 Diag(ELoc, diag::err_omp_reduction_id_not_compatible) << Type
5716 << ReductionIdRange;
5718 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5719 Diag(VD->getLocation(),
5720 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5724 auto *LHSDRE = buildDeclRefExpr(*this, LHSVD, Type, ELoc);
5725 auto *RHSDRE = buildDeclRefExpr(*this, RHSVD, Type, ELoc);
5726 ExprResult ReductionOp =
5727 BuildBinOp(DSAStack->getCurScope(), ReductionId.getLocStart(), BOK,
5729 if (ReductionOp.isUsable()) {
5730 if (BOK != BO_LT && BOK != BO_GT) {
5732 BuildBinOp(DSAStack->getCurScope(), ReductionId.getLocStart(),
5733 BO_Assign, LHSDRE, ReductionOp.get());
5735 auto *ConditionalOp = new (Context) ConditionalOperator(
5736 ReductionOp.get(), SourceLocation(), LHSDRE, SourceLocation(),
5737 RHSDRE, Type, VK_LValue, OK_Ordinary);
5739 BuildBinOp(DSAStack->getCurScope(), ReductionId.getLocStart(),
5740 BO_Assign, LHSDRE, ConditionalOp);
5742 if (ReductionOp.isUsable()) {
5743 ReductionOp = ActOnFinishFullExpr(ReductionOp.get());
5746 if (ReductionOp.isInvalid())
5749 DSAStack->addDSA(VD, DE, OMPC_reduction);
5751 LHSs.push_back(LHSDRE);
5752 RHSs.push_back(RHSDRE);
5753 ReductionOps.push_back(ReductionOp.get());
5759 return OMPReductionClause::Create(
5760 Context, StartLoc, LParenLoc, ColonLoc, EndLoc, Vars,
5761 ReductionIdScopeSpec.getWithLocInContext(Context), ReductionId, LHSs,
5762 RHSs, ReductionOps);
5765 OMPClause *Sema::ActOnOpenMPLinearClause(ArrayRef<Expr *> VarList, Expr *Step,
5766 SourceLocation StartLoc,
5767 SourceLocation LParenLoc,
5768 SourceLocation ColonLoc,
5769 SourceLocation EndLoc) {
5770 SmallVector<Expr *, 8> Vars;
5771 SmallVector<Expr *, 8> Inits;
5772 for (auto &RefExpr : VarList) {
5773 assert(RefExpr && "NULL expr in OpenMP linear clause.");
5774 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
5775 // It will be analyzed later.
5776 Vars.push_back(RefExpr);
5777 Inits.push_back(nullptr);
5781 // OpenMP [2.14.3.7, linear clause]
5782 // A list item that appears in a linear clause is subject to the private
5783 // clause semantics described in Section 2.14.3.3 on page 159 except as
5784 // noted. In addition, the value of the new list item on each iteration
5785 // of the associated loop(s) corresponds to the value of the original
5786 // list item before entering the construct plus the logical number of
5787 // the iteration times linear-step.
5789 SourceLocation ELoc = RefExpr->getExprLoc();
5790 // OpenMP [2.1, C/C++]
5791 // A list item is a variable name.
5792 // OpenMP [2.14.3.3, Restrictions, p.1]
5793 // A variable that is part of another variable (as an array or
5794 // structure element) cannot appear in a private clause.
5795 DeclRefExpr *DE = dyn_cast<DeclRefExpr>(RefExpr);
5796 if (!DE || !isa<VarDecl>(DE->getDecl())) {
5797 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
5801 VarDecl *VD = cast<VarDecl>(DE->getDecl());
5803 // OpenMP [2.14.3.7, linear clause]
5804 // A list-item cannot appear in more than one linear clause.
5805 // A list-item that appears in a linear clause cannot appear in any
5806 // other data-sharing attribute clause.
5807 DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD, false);
5809 Diag(ELoc, diag::err_omp_wrong_dsa) << getOpenMPClauseName(DVar.CKind)
5810 << getOpenMPClauseName(OMPC_linear);
5811 ReportOriginalDSA(*this, DSAStack, VD, DVar);
5815 QualType QType = VD->getType();
5816 if (QType->isDependentType() || QType->isInstantiationDependentType()) {
5817 // It will be analyzed later.
5819 Inits.push_back(nullptr);
5823 // A variable must not have an incomplete type or a reference type.
5824 if (RequireCompleteType(ELoc, QType,
5825 diag::err_omp_linear_incomplete_type)) {
5828 if (QType->isReferenceType()) {
5829 Diag(ELoc, diag::err_omp_clause_ref_type_arg)
5830 << getOpenMPClauseName(OMPC_linear) << QType;
5832 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5833 Diag(VD->getLocation(),
5834 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5839 // A list item must not be const-qualified.
5840 if (QType.isConstant(Context)) {
5841 Diag(ELoc, diag::err_omp_const_variable)
5842 << getOpenMPClauseName(OMPC_linear);
5844 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5845 Diag(VD->getLocation(),
5846 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5851 // A list item must be of integral or pointer type.
5852 QType = QType.getUnqualifiedType().getCanonicalType();
5853 const Type *Ty = QType.getTypePtrOrNull();
5854 if (!Ty || (!Ty->isDependentType() && !Ty->isIntegralType(Context) &&
5855 !Ty->isPointerType())) {
5856 Diag(ELoc, diag::err_omp_linear_expected_int_or_ptr) << QType;
5858 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
5859 Diag(VD->getLocation(),
5860 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
5865 // Build var to save initial value.
5866 VarDecl *Init = buildVarDecl(*this, ELoc, QType, ".linear.start");
5867 AddInitializerToDecl(Init, DefaultLvalueConversion(DE).get(),
5868 /*DirectInit*/ false, /*TypeMayContainAuto*/ false);
5869 auto InitRef = buildDeclRefExpr(
5870 *this, Init, DE->getType().getUnqualifiedType(), DE->getExprLoc());
5871 DSAStack->addDSA(VD, DE, OMPC_linear);
5873 Inits.push_back(InitRef);
5879 Expr *StepExpr = Step;
5880 Expr *CalcStepExpr = nullptr;
5881 if (Step && !Step->isValueDependent() && !Step->isTypeDependent() &&
5882 !Step->isInstantiationDependent() &&
5883 !Step->containsUnexpandedParameterPack()) {
5884 SourceLocation StepLoc = Step->getLocStart();
5885 ExprResult Val = PerformOpenMPImplicitIntegerConversion(StepLoc, Step);
5886 if (Val.isInvalid())
5888 StepExpr = Val.get();
5890 // Build var to save the step value.
5892 buildVarDecl(*this, StepLoc, StepExpr->getType(), ".linear.step");
5893 ExprResult SaveRef =
5894 buildDeclRefExpr(*this, SaveVar, StepExpr->getType(), StepLoc);
5895 ExprResult CalcStep =
5896 BuildBinOp(CurScope, StepLoc, BO_Assign, SaveRef.get(), StepExpr);
5898 // Warn about zero linear step (it would be probably better specified as
5899 // making corresponding variables 'const').
5900 llvm::APSInt Result;
5901 bool IsConstant = StepExpr->isIntegerConstantExpr(Result, Context);
5902 if (IsConstant && !Result.isNegative() && !Result.isStrictlyPositive())
5903 Diag(StepLoc, diag::warn_omp_linear_step_zero) << Vars[0]
5904 << (Vars.size() > 1);
5905 if (!IsConstant && CalcStep.isUsable()) {
5906 // Calculate the step beforehand instead of doing this on each iteration.
5907 // (This is not used if the number of iterations may be kfold-ed).
5908 CalcStepExpr = CalcStep.get();
5912 return OMPLinearClause::Create(Context, StartLoc, LParenLoc, ColonLoc, EndLoc,
5913 Vars, Inits, StepExpr, CalcStepExpr);
5916 static bool FinishOpenMPLinearClause(OMPLinearClause &Clause, DeclRefExpr *IV,
5917 Expr *NumIterations, Sema &SemaRef,
5919 // Walk the vars and build update/final expressions for the CodeGen.
5920 SmallVector<Expr *, 8> Updates;
5921 SmallVector<Expr *, 8> Finals;
5922 Expr *Step = Clause.getStep();
5923 Expr *CalcStep = Clause.getCalcStep();
5924 // OpenMP [2.14.3.7, linear clause]
5925 // If linear-step is not specified it is assumed to be 1.
5926 if (Step == nullptr)
5927 Step = SemaRef.ActOnIntegerConstant(SourceLocation(), 1).get();
5929 Step = cast<BinaryOperator>(CalcStep)->getLHS();
5930 bool HasErrors = false;
5931 auto CurInit = Clause.inits().begin();
5932 for (auto &RefExpr : Clause.varlists()) {
5933 Expr *InitExpr = *CurInit;
5935 // Build privatized reference to the current linear var.
5936 auto DE = cast<DeclRefExpr>(RefExpr);
5938 buildDeclRefExpr(SemaRef, cast<VarDecl>(DE->getDecl()),
5939 DE->getType().getUnqualifiedType(), DE->getExprLoc(),
5940 /*RefersToCapture=*/true);
5942 // Build update: Var = InitExpr + IV * Step
5944 BuildCounterUpdate(SemaRef, S, RefExpr->getExprLoc(), PrivateRef,
5945 InitExpr, IV, Step, /* Subtract */ false);
5946 Update = SemaRef.ActOnFinishFullExpr(Update.get());
5948 // Build final: Var = InitExpr + NumIterations * Step
5950 BuildCounterUpdate(SemaRef, S, RefExpr->getExprLoc(), PrivateRef,
5951 InitExpr, NumIterations, Step, /* Subtract */ false);
5952 Final = SemaRef.ActOnFinishFullExpr(Final.get());
5953 if (!Update.isUsable() || !Final.isUsable()) {
5954 Updates.push_back(nullptr);
5955 Finals.push_back(nullptr);
5958 Updates.push_back(Update.get());
5959 Finals.push_back(Final.get());
5963 Clause.setUpdates(Updates);
5964 Clause.setFinals(Finals);
5968 OMPClause *Sema::ActOnOpenMPAlignedClause(
5969 ArrayRef<Expr *> VarList, Expr *Alignment, SourceLocation StartLoc,
5970 SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation EndLoc) {
5972 SmallVector<Expr *, 8> Vars;
5973 for (auto &RefExpr : VarList) {
5974 assert(RefExpr && "NULL expr in OpenMP aligned clause.");
5975 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
5976 // It will be analyzed later.
5977 Vars.push_back(RefExpr);
5981 SourceLocation ELoc = RefExpr->getExprLoc();
5982 // OpenMP [2.1, C/C++]
5983 // A list item is a variable name.
5984 DeclRefExpr *DE = dyn_cast<DeclRefExpr>(RefExpr);
5985 if (!DE || !isa<VarDecl>(DE->getDecl())) {
5986 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
5990 VarDecl *VD = cast<VarDecl>(DE->getDecl());
5992 // OpenMP [2.8.1, simd construct, Restrictions]
5993 // The type of list items appearing in the aligned clause must be
5994 // array, pointer, reference to array, or reference to pointer.
5995 QualType QType = VD->getType();
5996 QType = QType.getNonReferenceType().getUnqualifiedType().getCanonicalType();
5997 const Type *Ty = QType.getTypePtrOrNull();
5998 if (!Ty || (!Ty->isDependentType() && !Ty->isArrayType() &&
5999 !Ty->isPointerType())) {
6000 Diag(ELoc, diag::err_omp_aligned_expected_array_or_ptr)
6001 << QType << getLangOpts().CPlusPlus << RefExpr->getSourceRange();
6003 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
6004 Diag(VD->getLocation(),
6005 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
6010 // OpenMP [2.8.1, simd construct, Restrictions]
6011 // A list-item cannot appear in more than one aligned clause.
6012 if (DeclRefExpr *PrevRef = DSAStack->addUniqueAligned(VD, DE)) {
6013 Diag(ELoc, diag::err_omp_aligned_twice) << RefExpr->getSourceRange();
6014 Diag(PrevRef->getExprLoc(), diag::note_omp_explicit_dsa)
6015 << getOpenMPClauseName(OMPC_aligned);
6022 // OpenMP [2.8.1, simd construct, Description]
6023 // The parameter of the aligned clause, alignment, must be a constant
6024 // positive integer expression.
6025 // If no optional parameter is specified, implementation-defined default
6026 // alignments for SIMD instructions on the target platforms are assumed.
6027 if (Alignment != nullptr) {
6028 ExprResult AlignResult =
6029 VerifyPositiveIntegerConstantInClause(Alignment, OMPC_aligned);
6030 if (AlignResult.isInvalid())
6032 Alignment = AlignResult.get();
6037 return OMPAlignedClause::Create(Context, StartLoc, LParenLoc, ColonLoc,
6038 EndLoc, Vars, Alignment);
6041 OMPClause *Sema::ActOnOpenMPCopyinClause(ArrayRef<Expr *> VarList,
6042 SourceLocation StartLoc,
6043 SourceLocation LParenLoc,
6044 SourceLocation EndLoc) {
6045 SmallVector<Expr *, 8> Vars;
6046 SmallVector<Expr *, 8> SrcExprs;
6047 SmallVector<Expr *, 8> DstExprs;
6048 SmallVector<Expr *, 8> AssignmentOps;
6049 for (auto &RefExpr : VarList) {
6050 assert(RefExpr && "NULL expr in OpenMP copyin clause.");
6051 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
6052 // It will be analyzed later.
6053 Vars.push_back(RefExpr);
6054 SrcExprs.push_back(nullptr);
6055 DstExprs.push_back(nullptr);
6056 AssignmentOps.push_back(nullptr);
6060 SourceLocation ELoc = RefExpr->getExprLoc();
6061 // OpenMP [2.1, C/C++]
6062 // A list item is a variable name.
6063 // OpenMP [2.14.4.1, Restrictions, p.1]
6064 // A list item that appears in a copyin clause must be threadprivate.
6065 DeclRefExpr *DE = dyn_cast<DeclRefExpr>(RefExpr);
6066 if (!DE || !isa<VarDecl>(DE->getDecl())) {
6067 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
6071 Decl *D = DE->getDecl();
6072 VarDecl *VD = cast<VarDecl>(D);
6074 QualType Type = VD->getType();
6075 if (Type->isDependentType() || Type->isInstantiationDependentType()) {
6076 // It will be analyzed later.
6078 SrcExprs.push_back(nullptr);
6079 DstExprs.push_back(nullptr);
6080 AssignmentOps.push_back(nullptr);
6084 // OpenMP [2.14.4.1, Restrictions, C/C++, p.1]
6085 // A list item that appears in a copyin clause must be threadprivate.
6086 if (!DSAStack->isThreadPrivate(VD)) {
6087 Diag(ELoc, diag::err_omp_required_access)
6088 << getOpenMPClauseName(OMPC_copyin)
6089 << getOpenMPDirectiveName(OMPD_threadprivate);
6093 // OpenMP [2.14.4.1, Restrictions, C/C++, p.2]
6094 // A variable of class type (or array thereof) that appears in a
6095 // copyin clause requires an accessible, unambiguous copy assignment
6096 // operator for the class type.
6097 auto ElemType = Context.getBaseElementType(Type).getNonReferenceType();
6098 auto *SrcVD = buildVarDecl(*this, DE->getLocStart(),
6099 ElemType.getUnqualifiedType(), ".copyin.src");
6100 auto *PseudoSrcExpr = buildDeclRefExpr(
6101 *this, SrcVD, ElemType.getUnqualifiedType(), DE->getExprLoc());
6103 buildVarDecl(*this, DE->getLocStart(), ElemType, ".copyin.dst");
6104 auto *PseudoDstExpr =
6105 buildDeclRefExpr(*this, DstVD, ElemType, DE->getExprLoc());
6106 // For arrays generate assignment operation for single element and replace
6107 // it by the original array element in CodeGen.
6108 auto AssignmentOp = BuildBinOp(/*S=*/nullptr, DE->getExprLoc(), BO_Assign,
6109 PseudoDstExpr, PseudoSrcExpr);
6110 if (AssignmentOp.isInvalid())
6112 AssignmentOp = ActOnFinishFullExpr(AssignmentOp.get(), DE->getExprLoc(),
6113 /*DiscardedValue=*/true);
6114 if (AssignmentOp.isInvalid())
6117 DSAStack->addDSA(VD, DE, OMPC_copyin);
6119 SrcExprs.push_back(PseudoSrcExpr);
6120 DstExprs.push_back(PseudoDstExpr);
6121 AssignmentOps.push_back(AssignmentOp.get());
6127 return OMPCopyinClause::Create(Context, StartLoc, LParenLoc, EndLoc, Vars,
6128 SrcExprs, DstExprs, AssignmentOps);
6131 OMPClause *Sema::ActOnOpenMPCopyprivateClause(ArrayRef<Expr *> VarList,
6132 SourceLocation StartLoc,
6133 SourceLocation LParenLoc,
6134 SourceLocation EndLoc) {
6135 SmallVector<Expr *, 8> Vars;
6136 SmallVector<Expr *, 8> SrcExprs;
6137 SmallVector<Expr *, 8> DstExprs;
6138 SmallVector<Expr *, 8> AssignmentOps;
6139 for (auto &RefExpr : VarList) {
6140 assert(RefExpr && "NULL expr in OpenMP copyprivate clause.");
6141 if (isa<DependentScopeDeclRefExpr>(RefExpr)) {
6142 // It will be analyzed later.
6143 Vars.push_back(RefExpr);
6144 SrcExprs.push_back(nullptr);
6145 DstExprs.push_back(nullptr);
6146 AssignmentOps.push_back(nullptr);
6150 SourceLocation ELoc = RefExpr->getExprLoc();
6151 // OpenMP [2.1, C/C++]
6152 // A list item is a variable name.
6153 // OpenMP [2.14.4.1, Restrictions, p.1]
6154 // A list item that appears in a copyin clause must be threadprivate.
6155 DeclRefExpr *DE = dyn_cast<DeclRefExpr>(RefExpr);
6156 if (!DE || !isa<VarDecl>(DE->getDecl())) {
6157 Diag(ELoc, diag::err_omp_expected_var_name) << RefExpr->getSourceRange();
6161 Decl *D = DE->getDecl();
6162 VarDecl *VD = cast<VarDecl>(D);
6164 QualType Type = VD->getType();
6165 if (Type->isDependentType() || Type->isInstantiationDependentType()) {
6166 // It will be analyzed later.
6168 SrcExprs.push_back(nullptr);
6169 DstExprs.push_back(nullptr);
6170 AssignmentOps.push_back(nullptr);
6174 // OpenMP [2.14.4.2, Restrictions, p.2]
6175 // A list item that appears in a copyprivate clause may not appear in a
6176 // private or firstprivate clause on the single construct.
6177 if (!DSAStack->isThreadPrivate(VD)) {
6178 auto DVar = DSAStack->getTopDSA(VD, false);
6179 if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_copyprivate &&
6181 Diag(ELoc, diag::err_omp_wrong_dsa)
6182 << getOpenMPClauseName(DVar.CKind)
6183 << getOpenMPClauseName(OMPC_copyprivate);
6184 ReportOriginalDSA(*this, DSAStack, VD, DVar);
6188 // OpenMP [2.11.4.2, Restrictions, p.1]
6189 // All list items that appear in a copyprivate clause must be either
6190 // threadprivate or private in the enclosing context.
6191 if (DVar.CKind == OMPC_unknown) {
6192 DVar = DSAStack->getImplicitDSA(VD, false);
6193 if (DVar.CKind == OMPC_shared) {
6194 Diag(ELoc, diag::err_omp_required_access)
6195 << getOpenMPClauseName(OMPC_copyprivate)
6196 << "threadprivate or private in the enclosing context";
6197 ReportOriginalDSA(*this, DSAStack, VD, DVar);
6203 // Variably modified types are not supported.
6204 if (!Type->isAnyPointerType() && Type->isVariablyModifiedType()) {
6205 Diag(ELoc, diag::err_omp_variably_modified_type_not_supported)
6206 << getOpenMPClauseName(OMPC_copyprivate) << Type
6207 << getOpenMPDirectiveName(DSAStack->getCurrentDirective());
6209 VD->isThisDeclarationADefinition(Context) == VarDecl::DeclarationOnly;
6210 Diag(VD->getLocation(),
6211 IsDecl ? diag::note_previous_decl : diag::note_defined_here)
6216 // OpenMP [2.14.4.1, Restrictions, C/C++, p.2]
6217 // A variable of class type (or array thereof) that appears in a
6218 // copyin clause requires an accessible, unambiguous copy assignment
6219 // operator for the class type.
6220 Type = Context.getBaseElementType(Type).getUnqualifiedType();
6222 buildVarDecl(*this, DE->getLocStart(), Type, ".copyprivate.src");
6223 auto *PseudoSrcExpr =
6224 buildDeclRefExpr(*this, SrcVD, Type, DE->getExprLoc());
6226 buildVarDecl(*this, DE->getLocStart(), Type, ".copyprivate.dst");
6227 auto *PseudoDstExpr =
6228 buildDeclRefExpr(*this, DstVD, Type, DE->getExprLoc());
6229 auto AssignmentOp = BuildBinOp(/*S=*/nullptr, DE->getExprLoc(), BO_Assign,
6230 PseudoDstExpr, PseudoSrcExpr);
6231 if (AssignmentOp.isInvalid())
6233 AssignmentOp = ActOnFinishFullExpr(AssignmentOp.get(), DE->getExprLoc(),
6234 /*DiscardedValue=*/true);
6235 if (AssignmentOp.isInvalid())
6238 // No need to mark vars as copyprivate, they are already threadprivate or
6239 // implicitly private.
6241 SrcExprs.push_back(PseudoSrcExpr);
6242 DstExprs.push_back(PseudoDstExpr);
6243 AssignmentOps.push_back(AssignmentOp.get());
6249 return OMPCopyprivateClause::Create(Context, StartLoc, LParenLoc, EndLoc,
6250 Vars, SrcExprs, DstExprs, AssignmentOps);
6253 OMPClause *Sema::ActOnOpenMPFlushClause(ArrayRef<Expr *> VarList,
6254 SourceLocation StartLoc,
6255 SourceLocation LParenLoc,
6256 SourceLocation EndLoc) {
6257 if (VarList.empty())
6260 return OMPFlushClause::Create(Context, StartLoc, LParenLoc, EndLoc, VarList);