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llvm-project/clang/lib/Sema/SemaOpenMP.cpp

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//===--- SemaOpenMP.cpp - Semantic Analysis for OpenMP constructs ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// \brief This file implements semantic analysis for OpenMP directives and
/// clauses.
///
//===----------------------------------------------------------------------===//
#include "clang/Basic/OpenMPKinds.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclOpenMP.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/Initialization.h"
#include "clang/Sema/SemaInternal.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/ScopeInfo.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Stack of data-sharing attributes for variables
//===----------------------------------------------------------------------===//
namespace {
/// \brief Default data sharing attributes, which can be applied to directive.
enum DefaultDataSharingAttributes {
DSA_unspecified = 0, /// \brief Data sharing attribute not specified.
DSA_none = 1 << 0, /// \brief Default data sharing attribute 'none'.
DSA_shared = 1 << 1 /// \brief Default data sharing attribute 'shared'.
};
/// \brief Stack for tracking declarations used in OpenMP directives and
/// clauses and their data-sharing attributes.
class DSAStackTy {
public:
struct DSAVarData {
OpenMPDirectiveKind DKind;
OpenMPClauseKind CKind;
DeclRefExpr *RefExpr;
DSAVarData() : DKind(OMPD_unknown), CKind(OMPC_unknown), RefExpr(0) { }
};
private:
struct DSAInfo {
OpenMPClauseKind Attributes;
DeclRefExpr *RefExpr;
};
typedef llvm::SmallDenseMap<VarDecl *, DSAInfo, 64> DeclSAMapTy;
struct SharingMapTy {
DeclSAMapTy SharingMap;
DefaultDataSharingAttributes DefaultAttr;
OpenMPDirectiveKind Directive;
DeclarationNameInfo DirectiveName;
Scope *CurScope;
SharingMapTy(OpenMPDirectiveKind DKind,
const DeclarationNameInfo &Name,
Scope *CurScope)
: SharingMap(), DefaultAttr(DSA_unspecified), Directive(DKind),
DirectiveName(Name), CurScope(CurScope) { }
SharingMapTy()
: SharingMap(), DefaultAttr(DSA_unspecified),
Directive(OMPD_unknown), DirectiveName(),
CurScope(0) { }
};
typedef SmallVector<SharingMapTy, 64> StackTy;
/// \brief Stack of used declaration and their data-sharing attributes.
StackTy Stack;
Sema &Actions;
typedef SmallVector<SharingMapTy, 8>::reverse_iterator reverse_iterator;
DSAVarData getDSA(StackTy::reverse_iterator Iter, VarDecl *D);
public:
explicit DSAStackTy(Sema &S) : Stack(1), Actions(S) { }
void push(OpenMPDirectiveKind DKind, const DeclarationNameInfo &DirName,
Scope *CurScope) {
Stack.push_back(SharingMapTy(DKind, DirName, CurScope));
}
void pop() {
assert(Stack.size() > 1 && "Data-sharing attributes stack is empty!");
Stack.pop_back();
}
/// \brief Adds explicit data sharing attribute to the specified declaration.
void addDSA(VarDecl *D, DeclRefExpr *E, OpenMPClauseKind A);
/// \brief Checks if the variable is a local for OpenMP region.
bool isOpenMPLocal(VarDecl *D);
/// \brief Returns data sharing attributes from top of the stack for the
/// specified declaration.
DSAVarData getTopDSA(VarDecl *D);
/// \brief Returns data-sharing attributes for the specified declaration.
DSAVarData getImplicitDSA(VarDecl *D);
/// \brief Returns currently analyzed directive.
OpenMPDirectiveKind getCurrentDirective() const {
return Stack.back().Directive;
}
/// \brief Set default data sharing attribute to none.
void setDefaultDSANone() { Stack.back().DefaultAttr = DSA_none; }
/// \brief Set default data sharing attribute to shared.
void setDefaultDSAShared() { Stack.back().DefaultAttr = DSA_shared; }
DefaultDataSharingAttributes getDefaultDSA() const {
return Stack.back().DefaultAttr;
}
Scope *getCurScope() { return Stack.back().CurScope; }
};
} // end anonymous namespace.
DSAStackTy::DSAVarData DSAStackTy::getDSA(StackTy::reverse_iterator Iter,
VarDecl *D) {
DSAVarData DVar;
if (Iter == Stack.rend() - 1) {
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a region but not in construct]
// File-scope or namespace-scope variables referenced in called routines
// in the region are shared unless they appear in a threadprivate
// directive.
// TODO
if (!D->isFunctionOrMethodVarDecl())
DVar.CKind = OMPC_shared;
return DVar;
}
DVar.DKind = Iter->Directive;
// Explicitly specified attributes and local variables with predetermined
// attributes.
if (Iter->SharingMap.count(D)) {
DVar.RefExpr = Iter->SharingMap[D].RefExpr;
DVar.CKind = Iter->SharingMap[D].Attributes;
return DVar;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, implicitly determined, p.1]
// In a parallel or task construct, the data-sharing attributes of these
// variables are determined by the default clause, if present.
switch (Iter->DefaultAttr) {
case DSA_shared:
DVar.CKind = OMPC_shared;
return DVar;
case DSA_none:
return DVar;
case DSA_unspecified:
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, implicitly determined, p.2]
// In a parallel construct, if no default clause is present, these
// variables are shared.
if (DVar.DKind == OMPD_parallel) {
DVar.CKind = OMPC_shared;
return DVar;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, implicitly determined, p.4]
// In a task construct, if no default clause is present, a variable that in
// the enclosing context is determined to be shared by all implicit tasks
// bound to the current team is shared.
// TODO
if (DVar.DKind == OMPD_task) {
DSAVarData DVarTemp;
for (StackTy::reverse_iterator I = Iter + 1,
EE = Stack.rend() - 1;
I != EE; ++I) {
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, implicitly determined, p.6]
// In a task construct, if no default clause is present, a variable
// whose data-sharing attribute is not determined by the rules above is
// firstprivate.
DVarTemp = getDSA(I, D);
if (DVarTemp.CKind != OMPC_shared) {
DVar.RefExpr = 0;
DVar.DKind = OMPD_task;
DVar.CKind = OMPC_unknown;
// TODO: should return OMPC_firstprivate
return DVar;
}
if (I->Directive == OMPD_parallel) break;
}
DVar.DKind = OMPD_task;
// TODO: Should return OMPC_firstprivate instead of OMPC_unknown.
DVar.CKind =
(DVarTemp.CKind == OMPC_unknown) ? OMPC_unknown : OMPC_shared;
return DVar;
}
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, implicitly determined, p.3]
// For constructs other than task, if no default clause is present, these
// variables inherit their data-sharing attributes from the enclosing
// context.
return getDSA(Iter + 1, D);
}
void DSAStackTy::addDSA(VarDecl *D, DeclRefExpr *E, OpenMPClauseKind A) {
if (A == OMPC_threadprivate) {
Stack[0].SharingMap[D].Attributes = A;
Stack[0].SharingMap[D].RefExpr = E;
} else {
assert(Stack.size() > 1 && "Data-sharing attributes stack is empty");
Stack.back().SharingMap[D].Attributes = A;
Stack.back().SharingMap[D].RefExpr = E;
}
}
bool DSAStackTy::isOpenMPLocal(VarDecl *D) {
Scope *CurScope = getCurScope();
while (CurScope && !CurScope->isDeclScope(D))
CurScope = CurScope->getParent();
while (CurScope && !CurScope->isOpenMPDirectiveScope())
CurScope = CurScope->getParent();
bool isOpenMPLocal = !!CurScope;
if (!isOpenMPLocal) {
CurScope = getCurScope();
while (CurScope && !CurScope->isOpenMPDirectiveScope())
CurScope = CurScope->getParent();
isOpenMPLocal =
CurScope &&
isa<CapturedDecl>(D->getDeclContext()) &&
static_cast<DeclContext *>(
CurScope->getFnParent()->getEntity())->Encloses(D->getDeclContext());
}
return isOpenMPLocal;
}
DSAStackTy::DSAVarData DSAStackTy::getTopDSA(VarDecl *D) {
DSAVarData DVar;
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, predetermined, p.1]
// Variables appearing in threadprivate directives are threadprivate.
if (D->getTLSKind() != VarDecl::TLS_None) {
DVar.CKind = OMPC_threadprivate;
return DVar;
}
if (Stack[0].SharingMap.count(D)) {
DVar.RefExpr = Stack[0].SharingMap[D].RefExpr;
DVar.CKind = OMPC_threadprivate;
return DVar;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, predetermined, p.1]
// Variables with automatic storage duration that are declared in a scope
// inside the construct are private.
if (isOpenMPLocal(D) && D->isLocalVarDecl() &&
(D->getStorageClass() == SC_Auto ||
D->getStorageClass() == SC_None)) {
DVar.CKind = OMPC_private;
return DVar;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, predetermined, p.4]
// Static data memebers are shared.
if (D->isStaticDataMember()) {
// Variables with const-qualified type having no mutable member may be
// listed in a firstprivate clause, even if they are static data members.
// TODO:
DVar.CKind = OMPC_shared;
return DVar;
}
QualType Type = D->getType().getNonReferenceType().getCanonicalType();
bool IsConstant = Type.isConstant(Actions.getASTContext());
while (Type->isArrayType()) {
QualType ElemType = cast<ArrayType>(Type.getTypePtr())->getElementType();
Type = ElemType.getNonReferenceType().getCanonicalType();
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, predetermined, p.6]
// Variables with const qualified type having no mutable member are
// shared.
CXXRecordDecl *RD = Actions.getLangOpts().CPlusPlus ?
Type->getAsCXXRecordDecl() : 0;
if (IsConstant &&
!(Actions.getLangOpts().CPlusPlus && RD && RD->hasMutableFields())) {
// Variables with const-qualified type having no mutable member may be
// listed in a firstprivate clause, even if they are static data members.
// TODO
DVar.CKind = OMPC_shared;
return DVar;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct, C/C++, predetermined, p.7]
// Variables with static storage duration that are declared in a scope
// inside the construct are shared.
if (isOpenMPLocal(D) && D->isStaticLocal()) {
DVar.CKind = OMPC_shared;
return DVar;
}
// Explicitly specified attributes and local variables with predetermined
// attributes.
if (Stack.back().SharingMap.count(D)) {
DVar.RefExpr = Stack.back().SharingMap[D].RefExpr;
DVar.CKind = Stack.back().SharingMap[D].Attributes;
}
return DVar;
}
DSAStackTy::DSAVarData DSAStackTy::getImplicitDSA(VarDecl *D) {
return getDSA(Stack.rbegin() + 1, D);
}
void Sema::InitDataSharingAttributesStack() {
VarDataSharingAttributesStack = new DSAStackTy(*this);
}
#define DSAStack static_cast<DSAStackTy *>(VarDataSharingAttributesStack)
void Sema::DestroyDataSharingAttributesStack() {
delete DSAStack;
}
void Sema::StartOpenMPDSABlock(OpenMPDirectiveKind DKind,
const DeclarationNameInfo &DirName,
Scope *CurScope) {
DSAStack->push(DKind, DirName, CurScope);
PushExpressionEvaluationContext(PotentiallyEvaluated);
}
void Sema::EndOpenMPDSABlock(Stmt *CurDirective) {
DSAStack->pop();
DiscardCleanupsInEvaluationContext();
PopExpressionEvaluationContext();
}
namespace {
class VarDeclFilterCCC : public CorrectionCandidateCallback {
private:
Sema &Actions;
public:
VarDeclFilterCCC(Sema &S) : Actions(S) { }
virtual bool ValidateCandidate(const TypoCorrection &Candidate) {
NamedDecl *ND = Candidate.getCorrectionDecl();
if (VarDecl *VD = dyn_cast_or_null<VarDecl>(ND)) {
return VD->hasGlobalStorage() &&
Actions.isDeclInScope(ND, Actions.getCurLexicalContext(),
Actions.getCurScope());
}
return false;
}
};
}
ExprResult Sema::ActOnOpenMPIdExpression(Scope *CurScope,
CXXScopeSpec &ScopeSpec,
const DeclarationNameInfo &Id) {
LookupResult Lookup(*this, Id, LookupOrdinaryName);
LookupParsedName(Lookup, CurScope, &ScopeSpec, true);
if (Lookup.isAmbiguous())
return ExprError();
VarDecl *VD;
if (!Lookup.isSingleResult()) {
VarDeclFilterCCC Validator(*this);
if (TypoCorrection Corrected = CorrectTypo(Id, LookupOrdinaryName, CurScope,
0, Validator)) {
diagnoseTypo(Corrected,
PDiag(Lookup.empty()? diag::err_undeclared_var_use_suggest
: diag::err_omp_expected_var_arg_suggest)
<< Id.getName());
VD = Corrected.getCorrectionDeclAs<VarDecl>();
} else {
Diag(Id.getLoc(), Lookup.empty() ? diag::err_undeclared_var_use
: diag::err_omp_expected_var_arg)
<< Id.getName();
return ExprError();
}
} else {
if (!(VD = Lookup.getAsSingle<VarDecl>())) {
Diag(Id.getLoc(), diag::err_omp_expected_var_arg)
<< Id.getName();
Diag(Lookup.getFoundDecl()->getLocation(), diag::note_declared_at);
return ExprError();
}
}
Lookup.suppressDiagnostics();
// OpenMP [2.9.2, Syntax, C/C++]
// Variables must be file-scope, namespace-scope, or static block-scope.
if (!VD->hasGlobalStorage()) {
Diag(Id.getLoc(), diag::err_omp_global_var_arg)
<< getOpenMPDirectiveName(OMPD_threadprivate)
<< !VD->isStaticLocal();
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(),
IsDecl ? diag::note_previous_decl : diag::note_defined_here) << VD;
return ExprError();
}
// OpenMP [2.9.2, Restrictions, C/C++, p.2]
// A threadprivate directive for file-scope variables must appear outside
// any definition or declaration.
// OpenMP [2.9.2, Restrictions, C/C++, p.3]
// A threadprivate directive for static class member variables must appear
// in the class definition, in the same scope in which the member
// variables are declared.
// OpenMP [2.9.2, Restrictions, C/C++, p.4]
// A threadprivate directive for namespace-scope variables must appear
// outside any definition or declaration other than the namespace
// definition itself.
// OpenMP [2.9.2, Restrictions, C/C++, p.6]
// A threadprivate directive for static block-scope variables must appear
// in the scope of the variable and not in a nested scope.
NamedDecl *ND = cast<NamedDecl>(VD);
if (!isDeclInScope(ND, getCurLexicalContext(), CurScope)) {
Diag(Id.getLoc(), diag::err_omp_var_scope)
<< getOpenMPDirectiveName(OMPD_threadprivate) << VD;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
return ExprError();
}
// OpenMP [2.9.2, Restrictions, C/C++, p.2-6]
// A threadprivate directive must lexically precede all references to any
// of the variables in its list.
if (VD->isUsed()) {
Diag(Id.getLoc(), diag::err_omp_var_used)
<< getOpenMPDirectiveName(OMPD_threadprivate) << VD;
return ExprError();
}
QualType ExprType = VD->getType().getNonReferenceType();
ExprResult DE = BuildDeclRefExpr(VD, ExprType, VK_RValue, Id.getLoc());
DSAStack->addDSA(VD, cast<DeclRefExpr>(DE.get()), OMPC_threadprivate);
return DE;
}
Sema::DeclGroupPtrTy Sema::ActOnOpenMPThreadprivateDirective(
SourceLocation Loc,
ArrayRef<Expr *> VarList) {
if (OMPThreadPrivateDecl *D = CheckOMPThreadPrivateDecl(Loc, VarList)) {
CurContext->addDecl(D);
return DeclGroupPtrTy::make(DeclGroupRef(D));
}
return DeclGroupPtrTy();
}
OMPThreadPrivateDecl *Sema::CheckOMPThreadPrivateDecl(
SourceLocation Loc,
ArrayRef<Expr *> VarList) {
SmallVector<Expr *, 8> Vars;
for (ArrayRef<Expr *>::iterator I = VarList.begin(),
E = VarList.end();
I != E; ++I) {
DeclRefExpr *DE = cast<DeclRefExpr>(*I);
VarDecl *VD = cast<VarDecl>(DE->getDecl());
SourceLocation ILoc = DE->getExprLoc();
// OpenMP [2.9.2, Restrictions, C/C++, p.10]
// A threadprivate variable must not have an incomplete type.
if (RequireCompleteType(ILoc, VD->getType(),
diag::err_omp_threadprivate_incomplete_type)) {
continue;
}
// OpenMP [2.9.2, Restrictions, C/C++, p.10]
// A threadprivate variable must not have a reference type.
if (VD->getType()->isReferenceType()) {
Diag(ILoc, diag::err_omp_ref_type_arg)
<< getOpenMPDirectiveName(OMPD_threadprivate)
<< VD->getType();
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
continue;
}
// Check if this is a TLS variable.
if (VD->getTLSKind()) {
Diag(ILoc, diag::err_omp_var_thread_local) << VD;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
continue;
}
Vars.push_back(*I);
}
return Vars.empty() ?
0 : OMPThreadPrivateDecl::Create(Context,
getCurLexicalContext(),
Loc, Vars);
}
namespace {
class DSAAttrChecker : public StmtVisitor<DSAAttrChecker, void> {
DSAStackTy *Stack;
Sema &Actions;
bool ErrorFound;
CapturedStmt *CS;
public:
void VisitDeclRefExpr(DeclRefExpr *E) {
if(VarDecl *VD = dyn_cast<VarDecl>(E->getDecl())) {
if (VD->isImplicit() && VD->hasAttr<UnusedAttr>()) return;
// Skip internally declared variables.
if (VD->isLocalVarDecl() && !CS->capturesVariable(VD)) return;
SourceLocation ELoc = E->getExprLoc();
OpenMPDirectiveKind DKind = Stack->getCurrentDirective();
DSAStackTy::DSAVarData DVar = Stack->getTopDSA(VD);
if (DVar.CKind != OMPC_unknown) {
if (DKind == OMPD_task && DVar.CKind != OMPC_shared &&
DVar.CKind != OMPC_threadprivate && !DVar.RefExpr) {
// TODO: should be marked as firstprivate.
}
return;
}
// The default(none) clause requires that each variable that is referenced
// in the construct, and does not have a predetermined data-sharing
// attribute, must have its data-sharing attribute explicitly determined
// by being listed in a data-sharing attribute clause.
if (DVar.CKind == OMPC_unknown && Stack->getDefaultDSA() == DSA_none &&
(DKind == OMPD_parallel || DKind == OMPD_task)) {
ErrorFound = true;
Actions.Diag(ELoc, diag::err_omp_no_dsa_for_variable) << VD;
return;
}
// OpenMP [2.9.3.6, Restrictions, p.2]
// A list item that appears in a reduction clause of the innermost
// enclosing worksharing or parallel construct may not be accessed in an
// explicit task.
// TODO:
// Define implicit data-sharing attributes for task.
DVar = Stack->getImplicitDSA(VD);
if (DKind == OMPD_task && DVar.CKind != OMPC_shared) {
// TODO: should be marked as firstprivate.
}
}
}
void VisitOMPExecutableDirective(OMPExecutableDirective *S) {
for (ArrayRef<OMPClause *>::iterator I = S->clauses().begin(),
E = S->clauses().end();
I != E; ++I)
if (OMPClause *C = *I)
for (StmtRange R = C->children(); R; ++R)
if (Stmt *Child = *R)
Visit(Child);
}
void VisitStmt(Stmt *S) {
for (Stmt::child_iterator I = S->child_begin(), E = S->child_end();
I != E; ++I)
if (Stmt *Child = *I)
if (!isa<OMPExecutableDirective>(Child))
Visit(Child);
}
bool isErrorFound() { return ErrorFound; }
DSAAttrChecker(DSAStackTy *S, Sema &Actions, CapturedStmt *CS)
: Stack(S), Actions(Actions), ErrorFound(false), CS(CS) { }
};
}
StmtResult Sema::ActOnOpenMPExecutableDirective(OpenMPDirectiveKind Kind,
ArrayRef<OMPClause *> Clauses,
Stmt *AStmt,
SourceLocation StartLoc,
SourceLocation EndLoc) {
assert(AStmt && isa<CapturedStmt>(AStmt) && "Captured statement expected");
StmtResult Res = StmtError();
// Check default data sharing attributes for referenced variables.
DSAAttrChecker DSAChecker(DSAStack, *this, cast<CapturedStmt>(AStmt));
DSAChecker.Visit(cast<CapturedStmt>(AStmt)->getCapturedStmt());
if (DSAChecker.isErrorFound())
return StmtError();
switch (Kind) {
case OMPD_parallel:
Res = ActOnOpenMPParallelDirective(Clauses, AStmt, StartLoc, EndLoc);
break;
case OMPD_threadprivate:
case OMPD_task:
llvm_unreachable("OpenMP Directive is not allowed");
case OMPD_unknown:
case NUM_OPENMP_DIRECTIVES:
llvm_unreachable("Unknown OpenMP directive");
}
return Res;
}
StmtResult Sema::ActOnOpenMPParallelDirective(ArrayRef<OMPClause *> Clauses,
Stmt *AStmt,
SourceLocation StartLoc,
SourceLocation EndLoc) {
getCurFunction()->setHasBranchProtectedScope();
return Owned(OMPParallelDirective::Create(Context, StartLoc, EndLoc,
Clauses, AStmt));
}
OMPClause *Sema::ActOnOpenMPSimpleClause(OpenMPClauseKind Kind,
unsigned Argument,
SourceLocation ArgumentLoc,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
OMPClause *Res = 0;
switch (Kind) {
case OMPC_default:
Res =
ActOnOpenMPDefaultClause(static_cast<OpenMPDefaultClauseKind>(Argument),
ArgumentLoc, StartLoc, LParenLoc, EndLoc);
break;
case OMPC_private:
case OMPC_shared:
case OMPC_threadprivate:
case OMPC_unknown:
case NUM_OPENMP_CLAUSES:
llvm_unreachable("Clause is not allowed.");
}
return Res;
}
OMPClause *Sema::ActOnOpenMPDefaultClause(OpenMPDefaultClauseKind Kind,
SourceLocation KindKwLoc,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
if (Kind == OMPC_DEFAULT_unknown) {
std::string Values;
std::string Sep(NUM_OPENMP_DEFAULT_KINDS > 1 ? ", " : "");
for (unsigned i = OMPC_DEFAULT_unknown + 1;
i < NUM_OPENMP_DEFAULT_KINDS; ++i) {
Values += "'";
Values += getOpenMPSimpleClauseTypeName(OMPC_default, i);
Values += "'";
switch (i) {
case NUM_OPENMP_DEFAULT_KINDS - 2:
Values += " or ";
break;
case NUM_OPENMP_DEFAULT_KINDS - 1:
break;
default:
Values += Sep;
break;
}
}
Diag(KindKwLoc, diag::err_omp_unexpected_clause_value)
<< Values << getOpenMPClauseName(OMPC_default);
return 0;
}
switch (Kind) {
case OMPC_DEFAULT_none:
DSAStack->setDefaultDSANone();
break;
case OMPC_DEFAULT_shared:
DSAStack->setDefaultDSAShared();
break;
default:
break;
}
return new (Context) OMPDefaultClause(Kind, KindKwLoc, StartLoc, LParenLoc,
EndLoc);
}
OMPClause *Sema::ActOnOpenMPVarListClause(OpenMPClauseKind Kind,
ArrayRef<Expr *> VarList,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
OMPClause *Res = 0;
switch (Kind) {
case OMPC_private:
Res = ActOnOpenMPPrivateClause(VarList, StartLoc, LParenLoc, EndLoc);
break;
case OMPC_shared:
Res = ActOnOpenMPSharedClause(VarList, StartLoc, LParenLoc, EndLoc);
break;
case OMPC_default:
case OMPC_threadprivate:
case OMPC_unknown:
case NUM_OPENMP_CLAUSES:
llvm_unreachable("Clause is not allowed.");
}
return Res;
}
OMPClause *Sema::ActOnOpenMPPrivateClause(ArrayRef<Expr *> VarList,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
SmallVector<Expr *, 8> Vars;
for (ArrayRef<Expr *>::iterator I = VarList.begin(), E = VarList.end();
I != E; ++I) {
if (*I && isa<DependentScopeDeclRefExpr>(*I)) {
// It will be analyzed later.
Vars.push_back(*I);
continue;
}
SourceLocation ELoc = (*I)->getExprLoc();
// OpenMP [2.1, C/C++]
// A list item is a variable name.
// OpenMP [2.9.3.3, Restrictions, p.1]
// A variable that is part of another variable (as an array or
// structure element) cannot appear in a private clause.
DeclRefExpr *DE = dyn_cast_or_null<DeclRefExpr>(*I);
if (!DE || !isa<VarDecl>(DE->getDecl())) {
Diag(ELoc, diag::err_omp_expected_var_name)
<< (*I)->getSourceRange();
continue;
}
Decl *D = DE->getDecl();
VarDecl *VD = cast<VarDecl>(D);
QualType Type = VD->getType();
if (Type->isDependentType() || Type->isInstantiationDependentType()) {
// It will be analyzed later.
Vars.push_back(DE);
continue;
}
// OpenMP [2.9.3.3, Restrictions, C/C++, p.3]
// A variable that appears in a private clause must not have an incomplete
// type or a reference type.
if (RequireCompleteType(ELoc, Type,
diag::err_omp_private_incomplete_type)) {
continue;
}
if (Type->isReferenceType()) {
Diag(ELoc, diag::err_omp_clause_ref_type_arg)
<< getOpenMPClauseName(OMPC_private) << Type;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
continue;
}
// OpenMP [2.9.3.3, Restrictions, C/C++, p.1]
// A variable of class type (or array thereof) that appears in a private
// clause requires an accesible, unambiguous default constructor for the
// class type.
while (Type.getNonReferenceType()->isArrayType()) {
Type = cast<ArrayType>(
Type.getNonReferenceType().getTypePtr())->getElementType();
}
CXXRecordDecl *RD = getLangOpts().CPlusPlus ?
Type.getNonReferenceType()->getAsCXXRecordDecl() : 0;
if (RD) {
CXXConstructorDecl *CD = LookupDefaultConstructor(RD);
PartialDiagnostic PD =
PartialDiagnostic(PartialDiagnostic::NullDiagnostic());
if (!CD ||
CheckConstructorAccess(ELoc, CD,
InitializedEntity::InitializeTemporary(Type),
CD->getAccess(), PD) == AR_inaccessible ||
CD->isDeleted()) {
Diag(ELoc, diag::err_omp_required_method)
<< getOpenMPClauseName(OMPC_private) << 0;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
Diag(RD->getLocation(), diag::note_previous_decl) << RD;
continue;
}
MarkFunctionReferenced(ELoc, CD);
DiagnoseUseOfDecl(CD, ELoc);
CXXDestructorDecl *DD = RD->getDestructor();
if (DD) {
if (CheckDestructorAccess(ELoc, DD, PD) == AR_inaccessible ||
DD->isDeleted()) {
Diag(ELoc, diag::err_omp_required_method)
<< getOpenMPClauseName(OMPC_private) << 4;
bool IsDecl = VD->isThisDeclarationADefinition(Context) ==
VarDecl::DeclarationOnly;
Diag(VD->getLocation(), IsDecl ? diag::note_previous_decl :
diag::note_defined_here) << VD;
Diag(RD->getLocation(), diag::note_previous_decl) << RD;
continue;
}
MarkFunctionReferenced(ELoc, DD);
DiagnoseUseOfDecl(DD, ELoc);
}
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct]
// Variables with the predetermined data-sharing attributes may not be
// listed in data-sharing attributes clauses, except for the cases
// listed below. For these exceptions only, listing a predetermined
// variable in a data-sharing attribute clause is allowed and overrides
// the variable's predetermined data-sharing attributes.
DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD);
if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_private) {
Diag(ELoc, diag::err_omp_wrong_dsa)
<< getOpenMPClauseName(DVar.CKind)
<< getOpenMPClauseName(OMPC_private);
if (DVar.RefExpr) {
Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_explicit_dsa)
<< getOpenMPClauseName(DVar.CKind);
} else {
Diag(VD->getLocation(), diag::note_omp_predetermined_dsa)
<< getOpenMPClauseName(DVar.CKind);
}
continue;
}
DSAStack->addDSA(VD, DE, OMPC_private);
Vars.push_back(DE);
}
if (Vars.empty()) return 0;
return OMPPrivateClause::Create(Context, StartLoc, LParenLoc, EndLoc, Vars);
}
OMPClause *Sema::ActOnOpenMPSharedClause(ArrayRef<Expr *> VarList,
SourceLocation StartLoc,
SourceLocation LParenLoc,
SourceLocation EndLoc) {
SmallVector<Expr *, 8> Vars;
for (ArrayRef<Expr *>::iterator I = VarList.begin(), E = VarList.end();
I != E; ++I) {
if (*I && isa<DependentScopeDeclRefExpr>(*I)) {
// It will be analyzed later.
Vars.push_back(*I);
continue;
}
SourceLocation ELoc = (*I)->getExprLoc();
// OpenMP [2.1, C/C++]
// A list item is a variable name.
// OpenMP [2.9.3.4, Restrictions, p.1]
// A variable that is part of another variable (as an array or
// structure element) cannot appear in a private clause.
DeclRefExpr *DE = dyn_cast<DeclRefExpr>(*I);
if (!DE || !isa<VarDecl>(DE->getDecl())) {
Diag(ELoc, diag::err_omp_expected_var_name)
<< (*I)->getSourceRange();
continue;
}
Decl *D = DE->getDecl();
VarDecl *VD = cast<VarDecl>(D);
QualType Type = VD->getType();
if (Type->isDependentType() || Type->isInstantiationDependentType()) {
// It will be analyzed later.
Vars.push_back(DE);
continue;
}
// OpenMP [2.9.1.1, Data-sharing Attribute Rules for Variables Referenced
// in a Construct]
// Variables with the predetermined data-sharing attributes may not be
// listed in data-sharing attributes clauses, except for the cases
// listed below. For these exceptions only, listing a predetermined
// variable in a data-sharing attribute clause is allowed and overrides
// the variable's predetermined data-sharing attributes.
DSAStackTy::DSAVarData DVar = DSAStack->getTopDSA(VD);
if (DVar.CKind != OMPC_unknown && DVar.CKind != OMPC_shared && DVar.RefExpr) {
Diag(ELoc, diag::err_omp_wrong_dsa)
<< getOpenMPClauseName(DVar.CKind)
<< getOpenMPClauseName(OMPC_shared);
Diag(DVar.RefExpr->getExprLoc(), diag::note_omp_explicit_dsa)
<< getOpenMPClauseName(DVar.CKind);
continue;
}
DSAStack->addDSA(VD, DE, OMPC_shared);
Vars.push_back(DE);
}
if (Vars.empty()) return 0;
return OMPSharedClause::Create(Context, StartLoc, LParenLoc, EndLoc, Vars);
}
#undef DSAStack
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