//===--- ParseOpenMP.cpp - OpenMP directives parsing ----------------------===//
//
// 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 parsing of all OpenMP directives and clauses.
///
//===----------------------------------------------------------------------===//
#include "RAIIObjectsForParser.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/Parse/ParseDiagnostic.h"
#include "clang/Parse/Parser.h"
#include "clang/Sema/Scope.h"
#include "llvm/ADT/PointerIntPair.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// OpenMP declarative directives.
//===----------------------------------------------------------------------===//
namespace {
enum OpenMPDirectiveKindEx {
OMPD_cancellation = OMPD_unknown + 1,
OMPD_data,
OMPD_declare,
OMPD_end,
OMPD_end_declare,
OMPD_enter,
OMPD_exit,
OMPD_point,
OMPD_reduction,
OMPD_target_enter,
OMPD_target_exit,
OMPD_update,
OMPD_distribute_parallel
};
class ThreadprivateListParserHelper final {
SmallVector<Expr *, 4> Identifiers;
Parser *P;
public:
ThreadprivateListParserHelper(Parser *P) : P(P) {}
void operator()(CXXScopeSpec &SS, DeclarationNameInfo NameInfo) {
ExprResult Res =
P->getActions().ActOnOpenMPIdExpression(P->getCurScope(), SS, NameInfo);
if (Res.isUsable())
Identifiers.push_back(Res.get());
}
llvm::ArrayRef<Expr *> getIdentifiers() const { return Identifiers; }
};
} // namespace
// Map token string to extended OMP token kind that are
// OpenMPDirectiveKind + OpenMPDirectiveKindEx.
static unsigned getOpenMPDirectiveKindEx(StringRef S) {
auto DKind = getOpenMPDirectiveKind(S);
if (DKind != OMPD_unknown)
return DKind;
return llvm::StringSwitch<unsigned>(S)
.Case("cancellation", OMPD_cancellation)
.Case("data", OMPD_data)
.Case("declare", OMPD_declare)
.Case("end", OMPD_end)
.Case("enter", OMPD_enter)
.Case("exit", OMPD_exit)
.Case("point", OMPD_point)
.Case("reduction", OMPD_reduction)
.Case("update", OMPD_update)
.Default(OMPD_unknown);
}
static OpenMPDirectiveKind ParseOpenMPDirectiveKind(Parser &P) {
// Array of foldings: F[i][0] F[i][1] ===> F[i][2].
// E.g.: OMPD_for OMPD_simd ===> OMPD_for_simd
// TODO: add other combined directives in topological order.
static const unsigned F[][3] = {
{ OMPD_cancellation, OMPD_point, OMPD_cancellation_point },
{ OMPD_declare, OMPD_reduction, OMPD_declare_reduction },
{ OMPD_declare, OMPD_simd, OMPD_declare_simd },
{ OMPD_declare, OMPD_target, OMPD_declare_target },
{ OMPD_distribute, OMPD_parallel, OMPD_distribute_parallel },
{ OMPD_distribute_parallel, OMPD_for, OMPD_distribute_parallel_for },
{ OMPD_distribute_parallel_for, OMPD_simd,
OMPD_distribute_parallel_for_simd },
{ OMPD_distribute, OMPD_simd, OMPD_distribute_simd },
{ OMPD_end, OMPD_declare, OMPD_end_declare },
{ OMPD_end_declare, OMPD_target, OMPD_end_declare_target },
{ OMPD_target, OMPD_data, OMPD_target_data },
{ OMPD_target, OMPD_enter, OMPD_target_enter },
{ OMPD_target, OMPD_exit, OMPD_target_exit },
{ OMPD_target, OMPD_update, OMPD_target_update },
{ OMPD_target_enter, OMPD_data, OMPD_target_enter_data },
{ OMPD_target_exit, OMPD_data, OMPD_target_exit_data },
{ OMPD_for, OMPD_simd, OMPD_for_simd },
{ OMPD_parallel, OMPD_for, OMPD_parallel_for },
{ OMPD_parallel_for, OMPD_simd, OMPD_parallel_for_simd },
{ OMPD_parallel, OMPD_sections, OMPD_parallel_sections },
{ OMPD_taskloop, OMPD_simd, OMPD_taskloop_simd },
{ OMPD_target, OMPD_parallel, OMPD_target_parallel },
{ OMPD_target_parallel, OMPD_for, OMPD_target_parallel_for },
{ OMPD_target_parallel_for, OMPD_simd, OMPD_target_parallel_for_simd }
};
enum { CancellationPoint = 0, DeclareReduction = 1, TargetData = 2 };
auto Tok = P.getCurToken();
unsigned DKind =
Tok.isAnnotation()
? static_cast<unsigned>(OMPD_unknown)
: getOpenMPDirectiveKindEx(P.getPreprocessor().getSpelling(Tok));
if (DKind == OMPD_unknown)
return OMPD_unknown;
for (unsigned i = 0; i < llvm::array_lengthof(F); ++i) {
if (DKind != F[i][0])
continue;
Tok = P.getPreprocessor().LookAhead(0);
unsigned SDKind =
Tok.isAnnotation()
? static_cast<unsigned>(OMPD_unknown)
: getOpenMPDirectiveKindEx(P.getPreprocessor().getSpelling(Tok));
if (SDKind == OMPD_unknown)
continue;
if (SDKind == F[i][1]) {
P.ConsumeToken();
DKind = F[i][2];
}
}
return DKind < OMPD_unknown ? static_cast<OpenMPDirectiveKind>(DKind)
: OMPD_unknown;
}
static DeclarationName parseOpenMPReductionId(Parser &P) {
Token Tok = P.getCurToken();
Sema &Actions = P.getActions();
OverloadedOperatorKind OOK = OO_None;
// Allow to use 'operator' keyword for C++ operators
bool WithOperator = false;
if (Tok.is(tok::kw_operator)) {
P.ConsumeToken();
Tok = P.getCurToken();
WithOperator = true;
}
switch (Tok.getKind()) {
case tok::plus: // '+'
OOK = OO_Plus;
break;
case tok::minus: // '-'
OOK = OO_Minus;
break;
case tok::star: // '*'
OOK = OO_Star;
break;
case tok::amp: // '&'
OOK = OO_Amp;
break;
case tok::pipe: // '|'
OOK = OO_Pipe;
break;
case tok::caret: // '^'
OOK = OO_Caret;
break;
case tok::ampamp: // '&&'
OOK = OO_AmpAmp;
break;
case tok::pipepipe: // '||'
OOK = OO_PipePipe;
break;
case tok::identifier: // identifier
if (!WithOperator)
break;
default:
P.Diag(Tok.getLocation(), diag::err_omp_expected_reduction_identifier);
P.SkipUntil(tok::colon, tok::r_paren, tok::annot_pragma_openmp_end,
Parser::StopBeforeMatch);
return DeclarationName();
}
P.ConsumeToken();
auto &DeclNames = Actions.getASTContext().DeclarationNames;
return OOK == OO_None ? DeclNames.getIdentifier(Tok.getIdentifierInfo())
: DeclNames.getCXXOperatorName(OOK);
}
/// \brief Parse 'omp declare reduction' construct.
///
/// declare-reduction-directive:
/// annot_pragma_openmp 'declare' 'reduction'
/// '(' <reduction_id> ':' <type> {',' <type>} ':' <expression> ')'
/// ['initializer' '(' ('omp_priv' '=' <expression>)|<function_call> ')']
/// annot_pragma_openmp_end
/// <reduction_id> is either a base language identifier or one of the following
/// operators: '+', '-', '*', '&', '|', '^', '&&' and '||'.
///
Parser::DeclGroupPtrTy
Parser::ParseOpenMPDeclareReductionDirective(AccessSpecifier AS) {
// Parse '('.
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after,
getOpenMPDirectiveName(OMPD_declare_reduction))) {
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
return DeclGroupPtrTy();
}
DeclarationName Name = parseOpenMPReductionId(*this);
if (Name.isEmpty() && Tok.is(tok::annot_pragma_openmp_end))
return DeclGroupPtrTy();
// Consume ':'.
bool IsCorrect = !ExpectAndConsume(tok::colon);
if (!IsCorrect && Tok.is(tok::annot_pragma_openmp_end))
return DeclGroupPtrTy();
IsCorrect = IsCorrect && !Name.isEmpty();
if (Tok.is(tok::colon) || Tok.is(tok::annot_pragma_openmp_end)) {
Diag(Tok.getLocation(), diag::err_expected_type);
IsCorrect = false;
}
if (!IsCorrect && Tok.is(tok::annot_pragma_openmp_end))
return DeclGroupPtrTy();
SmallVector<std::pair<QualType, SourceLocation>, 8> ReductionTypes;
// Parse list of types until ':' token.
do {
ColonProtectionRAIIObject ColonRAII(*this);
SourceRange Range;
TypeResult TR = ParseTypeName(&Range, Declarator::PrototypeContext, AS);
if (TR.isUsable()) {
auto ReductionType =
Actions.ActOnOpenMPDeclareReductionType(Range.getBegin(), TR);
if (!ReductionType.isNull()) {
ReductionTypes.push_back(
std::make_pair(ReductionType, Range.getBegin()));
}
} else {
SkipUntil(tok::comma, tok::colon, tok::annot_pragma_openmp_end,
StopBeforeMatch);
}
if (Tok.is(tok::colon) || Tok.is(tok::annot_pragma_openmp_end))
break;
// Consume ','.
if (ExpectAndConsume(tok::comma)) {
IsCorrect = false;
if (Tok.is(tok::annot_pragma_openmp_end)) {
Diag(Tok.getLocation(), diag::err_expected_type);
return DeclGroupPtrTy();
}
}
} while (Tok.isNot(tok::annot_pragma_openmp_end));
if (ReductionTypes.empty()) {
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
return DeclGroupPtrTy();
}
if (!IsCorrect && Tok.is(tok::annot_pragma_openmp_end))
return DeclGroupPtrTy();
// Consume ':'.
if (ExpectAndConsume(tok::colon))
IsCorrect = false;
if (Tok.is(tok::annot_pragma_openmp_end)) {
Diag(Tok.getLocation(), diag::err_expected_expression);
return DeclGroupPtrTy();
}
DeclGroupPtrTy DRD = Actions.ActOnOpenMPDeclareReductionDirectiveStart(
getCurScope(), Actions.getCurLexicalContext(), Name, ReductionTypes, AS);
// Parse <combiner> expression and then parse initializer if any for each
// correct type.
unsigned I = 0, E = ReductionTypes.size();
for (auto *D : DRD.get()) {
TentativeParsingAction TPA(*this);
ParseScope OMPDRScope(this, Scope::FnScope | Scope::DeclScope |
Scope::OpenMPDirectiveScope);
// Parse <combiner> expression.
Actions.ActOnOpenMPDeclareReductionCombinerStart(getCurScope(), D);
ExprResult CombinerResult =
Actions.ActOnFinishFullExpr(ParseAssignmentExpression().get(),
D->getLocation(), /*DiscardedValue=*/true);
Actions.ActOnOpenMPDeclareReductionCombinerEnd(D, CombinerResult.get());
if (CombinerResult.isInvalid() && Tok.isNot(tok::r_paren) &&
Tok.isNot(tok::annot_pragma_openmp_end)) {
TPA.Commit();
IsCorrect = false;
break;
}
IsCorrect = !T.consumeClose() && IsCorrect && CombinerResult.isUsable();
ExprResult InitializerResult;
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
// Parse <initializer> expression.
if (Tok.is(tok::identifier) &&
Tok.getIdentifierInfo()->isStr("initializer"))
ConsumeToken();
else {
Diag(Tok.getLocation(), diag::err_expected) << "'initializer'";
TPA.Commit();
IsCorrect = false;
break;
}
// Parse '('.
BalancedDelimiterTracker T(*this, tok::l_paren,
tok::annot_pragma_openmp_end);
IsCorrect =
!T.expectAndConsume(diag::err_expected_lparen_after, "initializer") &&
IsCorrect;
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
ParseScope OMPDRScope(this, Scope::FnScope | Scope::DeclScope |
Scope::OpenMPDirectiveScope);
// Parse expression.
Actions.ActOnOpenMPDeclareReductionInitializerStart(getCurScope(), D);
InitializerResult = Actions.ActOnFinishFullExpr(
ParseAssignmentExpression().get(), D->getLocation(),
/*DiscardedValue=*/true);
Actions.ActOnOpenMPDeclareReductionInitializerEnd(
D, InitializerResult.get());
if (InitializerResult.isInvalid() && Tok.isNot(tok::r_paren) &&
Tok.isNot(tok::annot_pragma_openmp_end)) {
TPA.Commit();
IsCorrect = false;
break;
}
IsCorrect =
!T.consumeClose() && IsCorrect && !InitializerResult.isInvalid();
}
}
++I;
// Revert parsing if not the last type, otherwise accept it, we're done with
// parsing.
if (I != E)
TPA.Revert();
else
TPA.Commit();
}
return Actions.ActOnOpenMPDeclareReductionDirectiveEnd(getCurScope(), DRD,
IsCorrect);
}
namespace {
/// RAII that recreates function context for correct parsing of clauses of
/// 'declare simd' construct.
/// OpenMP, 2.8.2 declare simd Construct
/// The expressions appearing in the clauses of this directive are evaluated in
/// the scope of the arguments of the function declaration or definition.
class FNContextRAII final {
Parser &P;
Sema::CXXThisScopeRAII *ThisScope;
Parser::ParseScope *TempScope;
Parser::ParseScope *FnScope;
bool HasTemplateScope = false;
bool HasFunScope = false;
FNContextRAII() = delete;
FNContextRAII(const FNContextRAII &) = delete;
FNContextRAII &operator=(const FNContextRAII &) = delete;
public:
FNContextRAII(Parser &P, Parser::DeclGroupPtrTy Ptr) : P(P) {
Decl *D = *Ptr.get().begin();
NamedDecl *ND = dyn_cast<NamedDecl>(D);
RecordDecl *RD = dyn_cast_or_null<RecordDecl>(D->getDeclContext());
Sema &Actions = P.getActions();
// Allow 'this' within late-parsed attributes.
ThisScope = new Sema::CXXThisScopeRAII(Actions, RD, /*TypeQuals=*/0,
ND && ND->isCXXInstanceMember());
// If the Decl is templatized, add template parameters to scope.
HasTemplateScope = D->isTemplateDecl();
TempScope =
new Parser::ParseScope(&P, Scope::TemplateParamScope, HasTemplateScope);
if (HasTemplateScope)
Actions.ActOnReenterTemplateScope(Actions.getCurScope(), D);
// If the Decl is on a function, add function parameters to the scope.
HasFunScope = D->isFunctionOrFunctionTemplate();
FnScope = new Parser::ParseScope(&P, Scope::FnScope | Scope::DeclScope,
HasFunScope);
if (HasFunScope)
Actions.ActOnReenterFunctionContext(Actions.getCurScope(), D);
}
~FNContextRAII() {
if (HasFunScope) {
P.getActions().ActOnExitFunctionContext();
FnScope->Exit(); // Pop scope, and remove Decls from IdResolver
}
if (HasTemplateScope)
TempScope->Exit();
delete FnScope;
delete TempScope;
delete ThisScope;
}
};
} // namespace
/// Parses clauses for 'declare simd' directive.
/// clause:
/// 'inbranch' | 'notinbranch'
/// 'simdlen' '(' <expr> ')'
/// { 'uniform' '(' <argument_list> ')' }
/// { 'aligned '(' <argument_list> [ ':' <alignment> ] ')' }
/// { 'linear '(' <argument_list> [ ':' <step> ] ')' }
static bool parseDeclareSimdClauses(
Parser &P, OMPDeclareSimdDeclAttr::BranchStateTy &BS, ExprResult &SimdLen,
SmallVectorImpl<Expr *> &Uniforms, SmallVectorImpl<Expr *> &Aligneds,
SmallVectorImpl<Expr *> &Alignments, SmallVectorImpl<Expr *> &Linears,
SmallVectorImpl<unsigned> &LinModifiers, SmallVectorImpl<Expr *> &Steps) {
SourceRange BSRange;
const Token &Tok = P.getCurToken();
bool IsError = false;
while (Tok.isNot(tok::annot_pragma_openmp_end)) {
if (Tok.isNot(tok::identifier))
break;
OMPDeclareSimdDeclAttr::BranchStateTy Out;
IdentifierInfo *II = Tok.getIdentifierInfo();
StringRef ClauseName = II->getName();
// Parse 'inranch|notinbranch' clauses.
if (OMPDeclareSimdDeclAttr::ConvertStrToBranchStateTy(ClauseName, Out)) {
if (BS != OMPDeclareSimdDeclAttr::BS_Undefined && BS != Out) {
P.Diag(Tok, diag::err_omp_declare_simd_inbranch_notinbranch)
<< ClauseName
<< OMPDeclareSimdDeclAttr::ConvertBranchStateTyToStr(BS) << BSRange;
IsError = true;
}
BS = Out;
BSRange = SourceRange(Tok.getLocation(), Tok.getEndLoc());
P.ConsumeToken();
} else if (ClauseName.equals("simdlen")) {
if (SimdLen.isUsable()) {
P.Diag(Tok, diag::err_omp_more_one_clause)
<< getOpenMPDirectiveName(OMPD_declare_simd) << ClauseName << 0;
IsError = true;
}
P.ConsumeToken();
SourceLocation RLoc;
SimdLen = P.ParseOpenMPParensExpr(ClauseName, RLoc);
if (SimdLen.isInvalid())
IsError = true;
} else {
OpenMPClauseKind CKind = getOpenMPClauseKind(ClauseName);
if (CKind == OMPC_uniform || CKind == OMPC_aligned ||
CKind == OMPC_linear) {
Parser::OpenMPVarListDataTy Data;
auto *Vars = &Uniforms;
if (CKind == OMPC_aligned)
Vars = &Aligneds;
else if (CKind == OMPC_linear)
Vars = &Linears;
P.ConsumeToken();
if (P.ParseOpenMPVarList(OMPD_declare_simd,
getOpenMPClauseKind(ClauseName), *Vars, Data))
IsError = true;
if (CKind == OMPC_aligned)
Alignments.append(Aligneds.size() - Alignments.size(), Data.TailExpr);
else if (CKind == OMPC_linear) {
if (P.getActions().CheckOpenMPLinearModifier(Data.LinKind,
Data.DepLinMapLoc))
Data.LinKind = OMPC_LINEAR_val;
LinModifiers.append(Linears.size() - LinModifiers.size(),
Data.LinKind);
Steps.append(Linears.size() - Steps.size(), Data.TailExpr);
}
} else
// TODO: add parsing of other clauses.
break;
}
// Skip ',' if any.
if (Tok.is(tok::comma))
P.ConsumeToken();
}
return IsError;
}
/// Parse clauses for '#pragma omp declare simd'.
Parser::DeclGroupPtrTy
Parser::ParseOMPDeclareSimdClauses(Parser::DeclGroupPtrTy Ptr,
CachedTokens &Toks, SourceLocation Loc) {
PP.EnterToken(Tok);
PP.EnterTokenStream(Toks, /*DisableMacroExpansion=*/true);
// Consume the previously pushed token.
ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
FNContextRAII FnContext(*this, Ptr);
OMPDeclareSimdDeclAttr::BranchStateTy BS =
OMPDeclareSimdDeclAttr::BS_Undefined;
ExprResult Simdlen;
SmallVector<Expr *, 4> Uniforms;
SmallVector<Expr *, 4> Aligneds;
SmallVector<Expr *, 4> Alignments;
SmallVector<Expr *, 4> Linears;
SmallVector<unsigned, 4> LinModifiers;
SmallVector<Expr *, 4> Steps;
bool IsError =
parseDeclareSimdClauses(*this, BS, Simdlen, Uniforms, Aligneds,
Alignments, Linears, LinModifiers, Steps);
// Need to check for extra tokens.
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(OMPD_declare_simd);
while (Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
}
// Skip the last annot_pragma_openmp_end.
SourceLocation EndLoc = ConsumeToken();
if (!IsError) {
return Actions.ActOnOpenMPDeclareSimdDirective(
Ptr, BS, Simdlen.get(), Uniforms, Aligneds, Alignments, Linears,
LinModifiers, Steps, SourceRange(Loc, EndLoc));
}
return Ptr;
}
/// \brief Parsing of declarative OpenMP directives.
///
/// threadprivate-directive:
/// annot_pragma_openmp 'threadprivate' simple-variable-list
/// annot_pragma_openmp_end
///
/// declare-reduction-directive:
/// annot_pragma_openmp 'declare' 'reduction' [...]
/// annot_pragma_openmp_end
///
/// declare-simd-directive:
/// annot_pragma_openmp 'declare simd' {<clause> [,]}
/// annot_pragma_openmp_end
/// <function declaration/definition>
///
Parser::DeclGroupPtrTy Parser::ParseOpenMPDeclarativeDirectiveWithExtDecl(
AccessSpecifier &AS, ParsedAttributesWithRange &Attrs,
DeclSpec::TST TagType, Decl *Tag) {
assert(Tok.is(tok::annot_pragma_openmp) && "Not an OpenMP directive!");
ParenBraceBracketBalancer BalancerRAIIObj(*this);
SourceLocation Loc = ConsumeToken();
auto DKind = ParseOpenMPDirectiveKind(*this);
switch (DKind) {
case OMPD_threadprivate: {
ConsumeToken();
ThreadprivateListParserHelper Helper(this);
if (!ParseOpenMPSimpleVarList(OMPD_threadprivate, Helper, true)) {
// The last seen token is annot_pragma_openmp_end - need to check for
// extra tokens.
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(OMPD_threadprivate);
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
}
// Skip the last annot_pragma_openmp_end.
ConsumeToken();
return Actions.ActOnOpenMPThreadprivateDirective(Loc,
Helper.getIdentifiers());
}
break;
}
case OMPD_declare_reduction:
ConsumeToken();
if (auto Res = ParseOpenMPDeclareReductionDirective(AS)) {
// The last seen token is annot_pragma_openmp_end - need to check for
// extra tokens.
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(OMPD_declare_reduction);
while (Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
}
// Skip the last annot_pragma_openmp_end.
ConsumeToken();
return Res;
}
break;
case OMPD_declare_simd: {
// The syntax is:
// { #pragma omp declare simd }
// <function-declaration-or-definition>
//
ConsumeToken();
CachedTokens Toks;
while(Tok.isNot(tok::annot_pragma_openmp_end)) {
Toks.push_back(Tok);
ConsumeAnyToken();
}
Toks.push_back(Tok);
ConsumeAnyToken();
DeclGroupPtrTy Ptr;
if (Tok.is(tok::annot_pragma_openmp))
Ptr = ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, Attrs, TagType, Tag);
else if (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
// Here we expect to see some function declaration.
if (AS == AS_none) {
assert(TagType == DeclSpec::TST_unspecified);
MaybeParseCXX11Attributes(Attrs);
MaybeParseMicrosoftAttributes(Attrs);
ParsingDeclSpec PDS(*this);
Ptr = ParseExternalDeclaration(Attrs, &PDS);
} else {
Ptr =
ParseCXXClassMemberDeclarationWithPragmas(AS, Attrs, TagType, Tag);
}
}
if (!Ptr) {
Diag(Loc, diag::err_omp_decl_in_declare_simd);
return DeclGroupPtrTy();
}
return ParseOMPDeclareSimdClauses(Ptr, Toks, Loc);
}
case OMPD_declare_target: {
SourceLocation DTLoc = ConsumeAnyToken();
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
// OpenMP 4.5 syntax with list of entities.
llvm::SmallSetVector<const NamedDecl*, 16> SameDirectiveDecls;
while (Tok.isNot(tok::annot_pragma_openmp_end)) {
OMPDeclareTargetDeclAttr::MapTypeTy MT =
OMPDeclareTargetDeclAttr::MT_To;
if (Tok.is(tok::identifier)) {
IdentifierInfo *II = Tok.getIdentifierInfo();
StringRef ClauseName = II->getName();
// Parse 'to|link' clauses.
if (!OMPDeclareTargetDeclAttr::ConvertStrToMapTypeTy(ClauseName,
MT)) {
Diag(Tok, diag::err_omp_declare_target_unexpected_clause)
<< ClauseName;
break;
}
ConsumeToken();
}
auto Callback = [this, MT, &SameDirectiveDecls](
CXXScopeSpec &SS, DeclarationNameInfo NameInfo) {
Actions.ActOnOpenMPDeclareTargetName(getCurScope(), SS, NameInfo, MT,
SameDirectiveDecls);
};
if (ParseOpenMPSimpleVarList(OMPD_declare_target, Callback, true))
break;
// Consume optional ','.
if (Tok.is(tok::comma))
ConsumeToken();
}
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
ConsumeAnyToken();
return DeclGroupPtrTy();
}
// Skip the last annot_pragma_openmp_end.
ConsumeAnyToken();
if (!Actions.ActOnStartOpenMPDeclareTargetDirective(DTLoc))
return DeclGroupPtrTy();
DKind = ParseOpenMPDirectiveKind(*this);
while (DKind != OMPD_end_declare_target && DKind != OMPD_declare_target &&
Tok.isNot(tok::eof) && Tok.isNot(tok::r_brace)) {
ParsedAttributesWithRange attrs(AttrFactory);
MaybeParseCXX11Attributes(attrs);
MaybeParseMicrosoftAttributes(attrs);
ParseExternalDeclaration(attrs);
if (Tok.isAnnotation() && Tok.is(tok::annot_pragma_openmp)) {
TentativeParsingAction TPA(*this);
ConsumeToken();
DKind = ParseOpenMPDirectiveKind(*this);
if (DKind != OMPD_end_declare_target)
TPA.Revert();
else
TPA.Commit();
}
}
if (DKind == OMPD_end_declare_target) {
ConsumeAnyToken();
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(OMPD_end_declare_target);
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
}
// Skip the last annot_pragma_openmp_end.
ConsumeAnyToken();
} else {
Diag(Tok, diag::err_expected_end_declare_target);
Diag(DTLoc, diag::note_matching) << "'#pragma omp declare target'";
}
Actions.ActOnFinishOpenMPDeclareTargetDirective();
return DeclGroupPtrTy();
}
case OMPD_unknown:
Diag(Tok, diag::err_omp_unknown_directive);
break;
case OMPD_parallel:
case OMPD_simd:
case OMPD_task:
case OMPD_taskyield:
case OMPD_barrier:
case OMPD_taskwait:
case OMPD_taskgroup:
case OMPD_flush:
case OMPD_for:
case OMPD_for_simd:
case OMPD_sections:
case OMPD_section:
case OMPD_single:
case OMPD_master:
case OMPD_ordered:
case OMPD_critical:
case OMPD_parallel_for:
case OMPD_parallel_for_simd:
case OMPD_parallel_sections:
case OMPD_atomic:
case OMPD_target:
case OMPD_teams:
case OMPD_cancellation_point:
case OMPD_cancel:
case OMPD_target_data:
case OMPD_target_enter_data:
case OMPD_target_exit_data:
case OMPD_target_parallel:
case OMPD_target_parallel_for:
case OMPD_taskloop:
case OMPD_taskloop_simd:
case OMPD_distribute:
case OMPD_end_declare_target:
case OMPD_target_update:
case OMPD_distribute_parallel_for:
case OMPD_distribute_parallel_for_simd:
case OMPD_distribute_simd:
case OMPD_target_parallel_for_simd:
Diag(Tok, diag::err_omp_unexpected_directive)
<< getOpenMPDirectiveName(DKind);
break;
}
while (Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
ConsumeAnyToken();
return nullptr;
}
/// \brief Parsing of declarative or executable OpenMP directives.
///
/// threadprivate-directive:
/// annot_pragma_openmp 'threadprivate' simple-variable-list
/// annot_pragma_openmp_end
///
/// declare-reduction-directive:
/// annot_pragma_openmp 'declare' 'reduction' '(' <reduction_id> ':'
/// <type> {',' <type>} ':' <expression> ')' ['initializer' '('
/// ('omp_priv' '=' <expression>|<function_call>) ')']
/// annot_pragma_openmp_end
///
/// executable-directive:
/// annot_pragma_openmp 'parallel' | 'simd' | 'for' | 'sections' |
/// 'section' | 'single' | 'master' | 'critical' [ '(' <name> ')' ] |
/// 'parallel for' | 'parallel sections' | 'task' | 'taskyield' |
/// 'barrier' | 'taskwait' | 'flush' | 'ordered' | 'atomic' |
/// 'for simd' | 'parallel for simd' | 'target' | 'target data' |
/// 'taskgroup' | 'teams' | 'taskloop' | 'taskloop simd' |
/// 'distribute' | 'target enter data' | 'target exit data' |
/// 'target parallel' | 'target parallel for' |
/// 'target update' | 'distribute parallel for' |
/// 'distribute paralle for simd' | 'distribute simd' |
/// 'target parallel for simd' {clause}
/// annot_pragma_openmp_end
///
StmtResult Parser::ParseOpenMPDeclarativeOrExecutableDirective(
AllowedContsructsKind Allowed) {
assert(Tok.is(tok::annot_pragma_openmp) && "Not an OpenMP directive!");
ParenBraceBracketBalancer BalancerRAIIObj(*this);
SmallVector<OMPClause *, 5> Clauses;
SmallVector<llvm::PointerIntPair<OMPClause *, 1, bool>, OMPC_unknown + 1>
FirstClauses(OMPC_unknown + 1);
unsigned ScopeFlags =
Scope::FnScope | Scope::DeclScope | Scope::OpenMPDirectiveScope;
SourceLocation Loc = ConsumeToken(), EndLoc;
auto DKind = ParseOpenMPDirectiveKind(*this);
OpenMPDirectiveKind CancelRegion = OMPD_unknown;
// Name of critical directive.
DeclarationNameInfo DirName;
StmtResult Directive = StmtError();
bool HasAssociatedStatement = true;
bool FlushHasClause = false;
switch (DKind) {
case OMPD_threadprivate: {
if (Allowed != ACK_Any) {
Diag(Tok, diag::err_omp_immediate_directive)
<< getOpenMPDirectiveName(DKind) << 0;
}
ConsumeToken();
ThreadprivateListParserHelper Helper(this);
if (!ParseOpenMPSimpleVarList(OMPD_threadprivate, Helper, false)) {
// The last seen token is annot_pragma_openmp_end - need to check for
// extra tokens.
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(OMPD_threadprivate);
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
}
DeclGroupPtrTy Res = Actions.ActOnOpenMPThreadprivateDirective(
Loc, Helper.getIdentifiers());
Directive = Actions.ActOnDeclStmt(Res, Loc, Tok.getLocation());
}
SkipUntil(tok::annot_pragma_openmp_end);
break;
}
case OMPD_declare_reduction:
ConsumeToken();
if (auto Res = ParseOpenMPDeclareReductionDirective(/*AS=*/AS_none)) {
// The last seen token is annot_pragma_openmp_end - need to check for
// extra tokens.
if (Tok.isNot(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(OMPD_declare_reduction);
while (Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
}
ConsumeAnyToken();
Directive = Actions.ActOnDeclStmt(Res, Loc, Tok.getLocation());
} else
SkipUntil(tok::annot_pragma_openmp_end);
break;
case OMPD_flush:
if (PP.LookAhead(0).is(tok::l_paren)) {
FlushHasClause = true;
// Push copy of the current token back to stream to properly parse
// pseudo-clause OMPFlushClause.
PP.EnterToken(Tok);
}
case OMPD_taskyield:
case OMPD_barrier:
case OMPD_taskwait:
case OMPD_cancellation_point:
case OMPD_cancel:
case OMPD_target_enter_data:
case OMPD_target_exit_data:
case OMPD_target_update:
if (Allowed == ACK_StatementsOpenMPNonStandalone) {
Diag(Tok, diag::err_omp_immediate_directive)
<< getOpenMPDirectiveName(DKind) << 0;
}
HasAssociatedStatement = false;
// Fall through for further analysis.
case OMPD_parallel:
case OMPD_simd:
case OMPD_for:
case OMPD_for_simd:
case OMPD_sections:
case OMPD_single:
case OMPD_section:
case OMPD_master:
case OMPD_critical:
case OMPD_parallel_for:
case OMPD_parallel_for_simd:
case OMPD_parallel_sections:
case OMPD_task:
case OMPD_ordered:
case OMPD_atomic:
case OMPD_target:
case OMPD_teams:
case OMPD_taskgroup:
case OMPD_target_data:
case OMPD_target_parallel:
case OMPD_target_parallel_for:
case OMPD_taskloop:
case OMPD_taskloop_simd:
case OMPD_distribute:
case OMPD_distribute_parallel_for:
case OMPD_distribute_parallel_for_simd:
case OMPD_distribute_simd:
case OMPD_target_parallel_for_simd: {
ConsumeToken();
// Parse directive name of the 'critical' directive if any.
if (DKind == OMPD_critical) {
BalancedDelimiterTracker T(*this, tok::l_paren,
tok::annot_pragma_openmp_end);
if (!T.consumeOpen()) {
if (Tok.isAnyIdentifier()) {
DirName =
DeclarationNameInfo(Tok.getIdentifierInfo(), Tok.getLocation());
ConsumeAnyToken();
} else {
Diag(Tok, diag::err_omp_expected_identifier_for_critical);
}
T.consumeClose();
}
} else if (DKind == OMPD_cancellation_point || DKind == OMPD_cancel) {
CancelRegion = ParseOpenMPDirectiveKind(*this);
if (Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeToken();
}
if (isOpenMPLoopDirective(DKind))
ScopeFlags |= Scope::OpenMPLoopDirectiveScope;
if (isOpenMPSimdDirective(DKind))
ScopeFlags |= Scope::OpenMPSimdDirectiveScope;
ParseScope OMPDirectiveScope(this, ScopeFlags);
Actions.StartOpenMPDSABlock(DKind, DirName, Actions.getCurScope(), Loc);
while (Tok.isNot(tok::annot_pragma_openmp_end)) {
OpenMPClauseKind CKind =
Tok.isAnnotation()
? OMPC_unknown
: FlushHasClause ? OMPC_flush
: getOpenMPClauseKind(PP.getSpelling(Tok));
Actions.StartOpenMPClause(CKind);
FlushHasClause = false;
OMPClause *Clause =
ParseOpenMPClause(DKind, CKind, !FirstClauses[CKind].getInt());
FirstClauses[CKind].setInt(true);
if (Clause) {
FirstClauses[CKind].setPointer(Clause);
Clauses.push_back(Clause);
}
// Skip ',' if any.
if (Tok.is(tok::comma))
ConsumeToken();
Actions.EndOpenMPClause();
}
// End location of the directive.
EndLoc = Tok.getLocation();
// Consume final annot_pragma_openmp_end.
ConsumeToken();
// OpenMP [2.13.8, ordered Construct, Syntax]
// If the depend clause is specified, the ordered construct is a stand-alone
// directive.
if (DKind == OMPD_ordered && FirstClauses[OMPC_depend].getInt()) {
if (Allowed == ACK_StatementsOpenMPNonStandalone) {
Diag(Loc, diag::err_omp_immediate_directive)
<< getOpenMPDirectiveName(DKind) << 1
<< getOpenMPClauseName(OMPC_depend);
}
HasAssociatedStatement = false;
}
StmtResult AssociatedStmt;
if (HasAssociatedStatement) {
// The body is a block scope like in Lambdas and Blocks.
Sema::CompoundScopeRAII CompoundScope(Actions);
Actions.ActOnOpenMPRegionStart(DKind, getCurScope());
Actions.ActOnStartOfCompoundStmt();
// Parse statement
AssociatedStmt = ParseStatement();
Actions.ActOnFinishOfCompoundStmt();
AssociatedStmt = Actions.ActOnOpenMPRegionEnd(AssociatedStmt, Clauses);
}
Directive = Actions.ActOnOpenMPExecutableDirective(
DKind, DirName, CancelRegion, Clauses, AssociatedStmt.get(), Loc,
EndLoc);
// Exit scope.
Actions.EndOpenMPDSABlock(Directive.get());
OMPDirectiveScope.Exit();
break;
}
case OMPD_declare_simd:
case OMPD_declare_target:
case OMPD_end_declare_target:
Diag(Tok, diag::err_omp_unexpected_directive)
<< getOpenMPDirectiveName(DKind);
SkipUntil(tok::annot_pragma_openmp_end);
break;
case OMPD_unknown:
Diag(Tok, diag::err_omp_unknown_directive);
SkipUntil(tok::annot_pragma_openmp_end);
break;
}
return Directive;
}
// Parses simple list:
// simple-variable-list:
// '(' id-expression {, id-expression} ')'
//
bool Parser::ParseOpenMPSimpleVarList(
OpenMPDirectiveKind Kind,
const llvm::function_ref<void(CXXScopeSpec &, DeclarationNameInfo)> &
Callback,
bool AllowScopeSpecifier) {
// Parse '('.
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after,
getOpenMPDirectiveName(Kind)))
return true;
bool IsCorrect = true;
bool NoIdentIsFound = true;
// Read tokens while ')' or annot_pragma_openmp_end is not found.
while (Tok.isNot(tok::r_paren) && Tok.isNot(tok::annot_pragma_openmp_end)) {
CXXScopeSpec SS;
SourceLocation TemplateKWLoc;
UnqualifiedId Name;
// Read var name.
Token PrevTok = Tok;
NoIdentIsFound = false;
if (AllowScopeSpecifier && getLangOpts().CPlusPlus &&
ParseOptionalCXXScopeSpecifier(SS, nullptr, false)) {
IsCorrect = false;
SkipUntil(tok::comma, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
} else if (ParseUnqualifiedId(SS, false, false, false, nullptr,
TemplateKWLoc, Name)) {
IsCorrect = false;
SkipUntil(tok::comma, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
} else if (Tok.isNot(tok::comma) && Tok.isNot(tok::r_paren) &&
Tok.isNot(tok::annot_pragma_openmp_end)) {
IsCorrect = false;
SkipUntil(tok::comma, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
Diag(PrevTok.getLocation(), diag::err_expected)
<< tok::identifier
<< SourceRange(PrevTok.getLocation(), PrevTokLocation);
} else {
Callback(SS, Actions.GetNameFromUnqualifiedId(Name));
}
// Consume ','.
if (Tok.is(tok::comma)) {
ConsumeToken();
}
}
if (NoIdentIsFound) {
Diag(Tok, diag::err_expected) << tok::identifier;
IsCorrect = false;
}
// Parse ')'.
IsCorrect = !T.consumeClose() && IsCorrect;
return !IsCorrect;
}
/// \brief Parsing of OpenMP clauses.
///
/// clause:
/// if-clause | final-clause | num_threads-clause | safelen-clause |
/// default-clause | private-clause | firstprivate-clause | shared-clause
/// | linear-clause | aligned-clause | collapse-clause |
/// lastprivate-clause | reduction-clause | proc_bind-clause |
/// schedule-clause | copyin-clause | copyprivate-clause | untied-clause |
/// mergeable-clause | flush-clause | read-clause | write-clause |
/// update-clause | capture-clause | seq_cst-clause | device-clause |
/// simdlen-clause | threads-clause | simd-clause | num_teams-clause |
/// thread_limit-clause | priority-clause | grainsize-clause |
/// nogroup-clause | num_tasks-clause | hint-clause | to-clause |
/// from-clause | is_device_ptr-clause
///
OMPClause *Parser::ParseOpenMPClause(OpenMPDirectiveKind DKind,
OpenMPClauseKind CKind, bool FirstClause) {
OMPClause *Clause = nullptr;
bool ErrorFound = false;
// Check if clause is allowed for the given directive.
if (CKind != OMPC_unknown && !isAllowedClauseForDirective(DKind, CKind)) {
Diag(Tok, diag::err_omp_unexpected_clause) << getOpenMPClauseName(CKind)
<< getOpenMPDirectiveName(DKind);
ErrorFound = true;
}
switch (CKind) {
case OMPC_final:
case OMPC_num_threads:
case OMPC_safelen:
case OMPC_simdlen:
case OMPC_collapse:
case OMPC_ordered:
case OMPC_device:
case OMPC_num_teams:
case OMPC_thread_limit:
case OMPC_priority:
case OMPC_grainsize:
case OMPC_num_tasks:
case OMPC_hint:
// OpenMP [2.5, Restrictions]
// At most one num_threads clause can appear on the directive.
// OpenMP [2.8.1, simd construct, Restrictions]
// Only one safelen clause can appear on a simd directive.
// Only one simdlen clause can appear on a simd directive.
// Only one collapse clause can appear on a simd directive.
// OpenMP [2.9.1, target data construct, Restrictions]
// At most one device clause can appear on the directive.
// OpenMP [2.11.1, task Construct, Restrictions]
// At most one if clause can appear on the directive.
// At most one final clause can appear on the directive.
// OpenMP [teams Construct, Restrictions]
// At most one num_teams clause can appear on the directive.
// At most one thread_limit clause can appear on the directive.
// OpenMP [2.9.1, task Construct, Restrictions]
// At most one priority clause can appear on the directive.
// OpenMP [2.9.2, taskloop Construct, Restrictions]
// At most one grainsize clause can appear on the directive.
// OpenMP [2.9.2, taskloop Construct, Restrictions]
// At most one num_tasks clause can appear on the directive.
if (!FirstClause) {
Diag(Tok, diag::err_omp_more_one_clause)
<< getOpenMPDirectiveName(DKind) << getOpenMPClauseName(CKind) << 0;
ErrorFound = true;
}
if (CKind == OMPC_ordered && PP.LookAhead(/*N=*/0).isNot(tok::l_paren))
Clause = ParseOpenMPClause(CKind);
else
Clause = ParseOpenMPSingleExprClause(CKind);
break;
case OMPC_default:
case OMPC_proc_bind:
// OpenMP [2.14.3.1, Restrictions]
// Only a single default clause may be specified on a parallel, task or
// teams directive.
// OpenMP [2.5, parallel Construct, Restrictions]
// At most one proc_bind clause can appear on the directive.
if (!FirstClause) {
Diag(Tok, diag::err_omp_more_one_clause)
<< getOpenMPDirectiveName(DKind) << getOpenMPClauseName(CKind) << 0;
ErrorFound = true;
}
Clause = ParseOpenMPSimpleClause(CKind);
break;
case OMPC_schedule:
case OMPC_dist_schedule:
case OMPC_defaultmap:
// OpenMP [2.7.1, Restrictions, p. 3]
// Only one schedule clause can appear on a loop directive.
// OpenMP [2.10.4, Restrictions, p. 106]
// At most one defaultmap clause can appear on the directive.
if (!FirstClause) {
Diag(Tok, diag::err_omp_more_one_clause)
<< getOpenMPDirectiveName(DKind) << getOpenMPClauseName(CKind) << 0;
ErrorFound = true;
}
case OMPC_if:
Clause = ParseOpenMPSingleExprWithArgClause(CKind);
break;
case OMPC_nowait:
case OMPC_untied:
case OMPC_mergeable:
case OMPC_read:
case OMPC_write:
case OMPC_update:
case OMPC_capture:
case OMPC_seq_cst:
case OMPC_threads:
case OMPC_simd:
case OMPC_nogroup:
// OpenMP [2.7.1, Restrictions, p. 9]
// Only one ordered clause can appear on a loop directive.
// OpenMP [2.7.1, Restrictions, C/C++, p. 4]
// Only one nowait clause can appear on a for directive.
if (!FirstClause) {
Diag(Tok, diag::err_omp_more_one_clause)
<< getOpenMPDirectiveName(DKind) << getOpenMPClauseName(CKind) << 0;
ErrorFound = true;
}
Clause = ParseOpenMPClause(CKind);
break;
case OMPC_private:
case OMPC_firstprivate:
case OMPC_lastprivate:
case OMPC_shared:
case OMPC_reduction:
case OMPC_linear:
case OMPC_aligned:
case OMPC_copyin:
case OMPC_copyprivate:
case OMPC_flush:
case OMPC_depend:
case OMPC_map:
case OMPC_to:
case OMPC_from:
case OMPC_use_device_ptr:
case OMPC_is_device_ptr:
Clause = ParseOpenMPVarListClause(DKind, CKind);
break;
case OMPC_unknown:
Diag(Tok, diag::warn_omp_extra_tokens_at_eol)
<< getOpenMPDirectiveName(DKind);
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
break;
case OMPC_threadprivate:
case OMPC_uniform:
Diag(Tok, diag::err_omp_unexpected_clause) << getOpenMPClauseName(CKind)
<< getOpenMPDirectiveName(DKind);
SkipUntil(tok::comma, tok::annot_pragma_openmp_end, StopBeforeMatch);
break;
}
return ErrorFound ? nullptr : Clause;
}
/// Parses simple expression in parens for single-expression clauses of OpenMP
/// constructs.
/// \param RLoc Returned location of right paren.
ExprResult Parser::ParseOpenMPParensExpr(StringRef ClauseName,
SourceLocation &RLoc) {
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after, ClauseName.data()))
return ExprError();
SourceLocation ELoc = Tok.getLocation();
ExprResult LHS(ParseCastExpression(
/*isUnaryExpression=*/false, /*isAddressOfOperand=*/false, NotTypeCast));
ExprResult Val(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
Val = Actions.ActOnFinishFullExpr(Val.get(), ELoc);
// Parse ')'.
T.consumeClose();
RLoc = T.getCloseLocation();
return Val;
}
/// \brief Parsing of OpenMP clauses with single expressions like 'final',
/// 'collapse', 'safelen', 'num_threads', 'simdlen', 'num_teams',
/// 'thread_limit', 'simdlen', 'priority', 'grainsize', 'num_tasks' or 'hint'.
///
/// final-clause:
/// 'final' '(' expression ')'
///
/// num_threads-clause:
/// 'num_threads' '(' expression ')'
///
/// safelen-clause:
/// 'safelen' '(' expression ')'
///
/// simdlen-clause:
/// 'simdlen' '(' expression ')'
///
/// collapse-clause:
/// 'collapse' '(' expression ')'
///
/// priority-clause:
/// 'priority' '(' expression ')'
///
/// grainsize-clause:
/// 'grainsize' '(' expression ')'
///
/// num_tasks-clause:
/// 'num_tasks' '(' expression ')'
///
/// hint-clause:
/// 'hint' '(' expression ')'
///
OMPClause *Parser::ParseOpenMPSingleExprClause(OpenMPClauseKind Kind) {
SourceLocation Loc = ConsumeToken();
SourceLocation LLoc = Tok.getLocation();
SourceLocation RLoc;
ExprResult Val = ParseOpenMPParensExpr(getOpenMPClauseName(Kind), RLoc);
if (Val.isInvalid())
return nullptr;
return Actions.ActOnOpenMPSingleExprClause(Kind, Val.get(), Loc, LLoc, RLoc);
}
/// \brief Parsing of simple OpenMP clauses like 'default' or 'proc_bind'.
///
/// default-clause:
/// 'default' '(' 'none' | 'shared' ')
///
/// proc_bind-clause:
/// 'proc_bind' '(' 'master' | 'close' | 'spread' ')
///
OMPClause *Parser::ParseOpenMPSimpleClause(OpenMPClauseKind Kind) {
SourceLocation Loc = Tok.getLocation();
SourceLocation LOpen = ConsumeToken();
// Parse '('.
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after,
getOpenMPClauseName(Kind)))
return nullptr;
unsigned Type = getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok));
SourceLocation TypeLoc = Tok.getLocation();
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
// Parse ')'.
T.consumeClose();
return Actions.ActOnOpenMPSimpleClause(Kind, Type, TypeLoc, LOpen, Loc,
Tok.getLocation());
}
/// \brief Parsing of OpenMP clauses like 'ordered'.
///
/// ordered-clause:
/// 'ordered'
///
/// nowait-clause:
/// 'nowait'
///
/// untied-clause:
/// 'untied'
///
/// mergeable-clause:
/// 'mergeable'
///
/// read-clause:
/// 'read'
///
/// threads-clause:
/// 'threads'
///
/// simd-clause:
/// 'simd'
///
/// nogroup-clause:
/// 'nogroup'
///
OMPClause *Parser::ParseOpenMPClause(OpenMPClauseKind Kind) {
SourceLocation Loc = Tok.getLocation();
ConsumeAnyToken();
return Actions.ActOnOpenMPClause(Kind, Loc, Tok.getLocation());
}
/// \brief Parsing of OpenMP clauses with single expressions and some additional
/// argument like 'schedule' or 'dist_schedule'.
///
/// schedule-clause:
/// 'schedule' '(' [ modifier [ ',' modifier ] ':' ] kind [',' expression ]
/// ')'
///
/// if-clause:
/// 'if' '(' [ directive-name-modifier ':' ] expression ')'
///
/// defaultmap:
/// 'defaultmap' '(' modifier ':' kind ')'
///
OMPClause *Parser::ParseOpenMPSingleExprWithArgClause(OpenMPClauseKind Kind) {
SourceLocation Loc = ConsumeToken();
SourceLocation DelimLoc;
// Parse '('.
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after,
getOpenMPClauseName(Kind)))
return nullptr;
ExprResult Val;
SmallVector<unsigned, 4> Arg;
SmallVector<SourceLocation, 4> KLoc;
if (Kind == OMPC_schedule) {
enum { Modifier1, Modifier2, ScheduleKind, NumberOfElements };
Arg.resize(NumberOfElements);
KLoc.resize(NumberOfElements);
Arg[Modifier1] = OMPC_SCHEDULE_MODIFIER_unknown;
Arg[Modifier2] = OMPC_SCHEDULE_MODIFIER_unknown;
Arg[ScheduleKind] = OMPC_SCHEDULE_unknown;
auto KindModifier = getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok));
if (KindModifier > OMPC_SCHEDULE_unknown) {
// Parse 'modifier'
Arg[Modifier1] = KindModifier;
KLoc[Modifier1] = Tok.getLocation();
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
if (Tok.is(tok::comma)) {
// Parse ',' 'modifier'
ConsumeAnyToken();
KindModifier = getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok));
Arg[Modifier2] = KindModifier > OMPC_SCHEDULE_unknown
? KindModifier
: (unsigned)OMPC_SCHEDULE_unknown;
KLoc[Modifier2] = Tok.getLocation();
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
}
// Parse ':'
if (Tok.is(tok::colon))
ConsumeAnyToken();
else
Diag(Tok, diag::warn_pragma_expected_colon) << "schedule modifier";
KindModifier = getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok));
}
Arg[ScheduleKind] = KindModifier;
KLoc[ScheduleKind] = Tok.getLocation();
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
if ((Arg[ScheduleKind] == OMPC_SCHEDULE_static ||
Arg[ScheduleKind] == OMPC_SCHEDULE_dynamic ||
Arg[ScheduleKind] == OMPC_SCHEDULE_guided) &&
Tok.is(tok::comma))
DelimLoc = ConsumeAnyToken();
} else if (Kind == OMPC_dist_schedule) {
Arg.push_back(getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok)));
KLoc.push_back(Tok.getLocation());
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
if (Arg.back() == OMPC_DIST_SCHEDULE_static && Tok.is(tok::comma))
DelimLoc = ConsumeAnyToken();
} else if (Kind == OMPC_defaultmap) {
// Get a defaultmap modifier
Arg.push_back(getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok)));
KLoc.push_back(Tok.getLocation());
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
// Parse ':'
if (Tok.is(tok::colon))
ConsumeAnyToken();
else if (Arg.back() != OMPC_DEFAULTMAP_MODIFIER_unknown)
Diag(Tok, diag::warn_pragma_expected_colon) << "defaultmap modifier";
// Get a defaultmap kind
Arg.push_back(getOpenMPSimpleClauseType(
Kind, Tok.isAnnotation() ? "" : PP.getSpelling(Tok)));
KLoc.push_back(Tok.getLocation());
if (Tok.isNot(tok::r_paren) && Tok.isNot(tok::comma) &&
Tok.isNot(tok::annot_pragma_openmp_end))
ConsumeAnyToken();
} else {
assert(Kind == OMPC_if);
KLoc.push_back(Tok.getLocation());
Arg.push_back(ParseOpenMPDirectiveKind(*this));
if (Arg.back() != OMPD_unknown) {
ConsumeToken();
if (Tok.is(tok::colon))
DelimLoc = ConsumeToken();
else
Diag(Tok, diag::warn_pragma_expected_colon)
<< "directive name modifier";
}
}
bool NeedAnExpression = (Kind == OMPC_schedule && DelimLoc.isValid()) ||
(Kind == OMPC_dist_schedule && DelimLoc.isValid()) ||
Kind == OMPC_if;
if (NeedAnExpression) {
SourceLocation ELoc = Tok.getLocation();
ExprResult LHS(ParseCastExpression(false, false, NotTypeCast));
Val = ParseRHSOfBinaryExpression(LHS, prec::Conditional);
Val = Actions.ActOnFinishFullExpr(Val.get(), ELoc);
}
// Parse ')'.
T.consumeClose();
if (NeedAnExpression && Val.isInvalid())
return nullptr;
return Actions.ActOnOpenMPSingleExprWithArgClause(
Kind, Arg, Val.get(), Loc, T.getOpenLocation(), KLoc, DelimLoc,
T.getCloseLocation());
}
static bool ParseReductionId(Parser &P, CXXScopeSpec &ReductionIdScopeSpec,
UnqualifiedId &ReductionId) {
SourceLocation TemplateKWLoc;
if (ReductionIdScopeSpec.isEmpty()) {
auto OOK = OO_None;
switch (P.getCurToken().getKind()) {
case tok::plus:
OOK = OO_Plus;
break;
case tok::minus:
OOK = OO_Minus;
break;
case tok::star:
OOK = OO_Star;
break;
case tok::amp:
OOK = OO_Amp;
break;
case tok::pipe:
OOK = OO_Pipe;
break;
case tok::caret:
OOK = OO_Caret;
break;
case tok::ampamp:
OOK = OO_AmpAmp;
break;
case tok::pipepipe:
OOK = OO_PipePipe;
break;
default:
break;
}
if (OOK != OO_None) {
SourceLocation OpLoc = P.ConsumeToken();
SourceLocation SymbolLocations[] = {OpLoc, OpLoc, SourceLocation()};
ReductionId.setOperatorFunctionId(OpLoc, OOK, SymbolLocations);
return false;
}
}
return P.ParseUnqualifiedId(ReductionIdScopeSpec, /*EnteringContext*/ false,
/*AllowDestructorName*/ false,
/*AllowConstructorName*/ false, nullptr,
TemplateKWLoc, ReductionId);
}
/// Parses clauses with list.
bool Parser::ParseOpenMPVarList(OpenMPDirectiveKind DKind,
OpenMPClauseKind Kind,
SmallVectorImpl<Expr *> &Vars,
OpenMPVarListDataTy &Data) {
UnqualifiedId UnqualifiedReductionId;
bool InvalidReductionId = false;
bool MapTypeModifierSpecified = false;
// Parse '('.
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after,
getOpenMPClauseName(Kind)))
return true;
bool NeedRParenForLinear = false;
BalancedDelimiterTracker LinearT(*this, tok::l_paren,
tok::annot_pragma_openmp_end);
// Handle reduction-identifier for reduction clause.
if (Kind == OMPC_reduction) {
ColonProtectionRAIIObject ColonRAII(*this);
if (getLangOpts().CPlusPlus)
ParseOptionalCXXScopeSpecifier(Data.ReductionIdScopeSpec,
/*ObjectType=*/nullptr,
/*EnteringContext=*/false);
InvalidReductionId = ParseReductionId(*this, Data.ReductionIdScopeSpec,
UnqualifiedReductionId);
if (InvalidReductionId) {
SkipUntil(tok::colon, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
}
if (Tok.is(tok::colon))
Data.ColonLoc = ConsumeToken();
else
Diag(Tok, diag::warn_pragma_expected_colon) << "reduction identifier";
if (!InvalidReductionId)
Data.ReductionId =
Actions.GetNameFromUnqualifiedId(UnqualifiedReductionId);
} else if (Kind == OMPC_depend) {
// Handle dependency type for depend clause.
ColonProtectionRAIIObject ColonRAII(*this);
Data.DepKind =
static_cast<OpenMPDependClauseKind>(getOpenMPSimpleClauseType(
Kind, Tok.is(tok::identifier) ? PP.getSpelling(Tok) : ""));
Data.DepLinMapLoc = Tok.getLocation();
if (Data.DepKind == OMPC_DEPEND_unknown) {
SkipUntil(tok::colon, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
} else {
ConsumeToken();
// Special processing for depend(source) clause.
if (DKind == OMPD_ordered && Data.DepKind == OMPC_DEPEND_source) {
// Parse ')'.
T.consumeClose();
return false;
}
}
if (Tok.is(tok::colon))
Data.ColonLoc = ConsumeToken();
else {
Diag(Tok, DKind == OMPD_ordered ? diag::warn_pragma_expected_colon_r_paren
: diag::warn_pragma_expected_colon)
<< "dependency type";
}
} else if (Kind == OMPC_linear) {
// Try to parse modifier if any.
if (Tok.is(tok::identifier) && PP.LookAhead(0).is(tok::l_paren)) {
Data.LinKind = static_cast<OpenMPLinearClauseKind>(
getOpenMPSimpleClauseType(Kind, PP.getSpelling(Tok)));
Data.DepLinMapLoc = ConsumeToken();
LinearT.consumeOpen();
NeedRParenForLinear = true;
}
} else if (Kind == OMPC_map) {
// Handle map type for map clause.
ColonProtectionRAIIObject ColonRAII(*this);
/// The map clause modifier token can be either a identifier or the C++
/// delete keyword.
auto &&IsMapClauseModifierToken = [](const Token &Tok) -> bool {
return Tok.isOneOf(tok::identifier, tok::kw_delete);
};
// The first identifier may be a list item, a map-type or a
// map-type-modifier. The map modifier can also be delete which has the same
// spelling of the C++ delete keyword.
Data.MapType =
IsMapClauseModifierToken(Tok)
? static_cast<OpenMPMapClauseKind>(
getOpenMPSimpleClauseType(Kind, PP.getSpelling(Tok)))
: OMPC_MAP_unknown;
Data.DepLinMapLoc = Tok.getLocation();
bool ColonExpected = false;
if (IsMapClauseModifierToken(Tok)) {
if (PP.LookAhead(0).is(tok::colon)) {
if (Data.MapType == OMPC_MAP_unknown)
Diag(Tok, diag::err_omp_unknown_map_type);
else if (Data.MapType == OMPC_MAP_always)
Diag(Tok, diag::err_omp_map_type_missing);
ConsumeToken();
} else if (PP.LookAhead(0).is(tok::comma)) {
if (IsMapClauseModifierToken(PP.LookAhead(1)) &&
PP.LookAhead(2).is(tok::colon)) {
Data.MapTypeModifier = Data.MapType;
if (Data.MapTypeModifier != OMPC_MAP_always) {
Diag(Tok, diag::err_omp_unknown_map_type_modifier);
Data.MapTypeModifier = OMPC_MAP_unknown;
} else
MapTypeModifierSpecified = true;
ConsumeToken();
ConsumeToken();
Data.MapType =
IsMapClauseModifierToken(Tok)
? static_cast<OpenMPMapClauseKind>(
getOpenMPSimpleClauseType(Kind, PP.getSpelling(Tok)))
: OMPC_MAP_unknown;
if (Data.MapType == OMPC_MAP_unknown ||
Data.MapType == OMPC_MAP_always)
Diag(Tok, diag::err_omp_unknown_map_type);
ConsumeToken();
} else {
Data.MapType = OMPC_MAP_tofrom;
Data.IsMapTypeImplicit = true;
}
} else {
Data.MapType = OMPC_MAP_tofrom;
Data.IsMapTypeImplicit = true;
}
} else {
Data.MapType = OMPC_MAP_tofrom;
Data.IsMapTypeImplicit = true;
}
if (Tok.is(tok::colon))
Data.ColonLoc = ConsumeToken();
else if (ColonExpected)
Diag(Tok, diag::warn_pragma_expected_colon) << "map type";
}
bool IsComma =
(Kind != OMPC_reduction && Kind != OMPC_depend && Kind != OMPC_map) ||
(Kind == OMPC_reduction && !InvalidReductionId) ||
(Kind == OMPC_map && Data.MapType != OMPC_MAP_unknown &&
(!MapTypeModifierSpecified ||
Data.MapTypeModifier == OMPC_MAP_always)) ||
(Kind == OMPC_depend && Data.DepKind != OMPC_DEPEND_unknown);
const bool MayHaveTail = (Kind == OMPC_linear || Kind == OMPC_aligned);
while (IsComma || (Tok.isNot(tok::r_paren) && Tok.isNot(tok::colon) &&
Tok.isNot(tok::annot_pragma_openmp_end))) {
ColonProtectionRAIIObject ColonRAII(*this, MayHaveTail);
// Parse variable
ExprResult VarExpr =
Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
if (VarExpr.isUsable())
Vars.push_back(VarExpr.get());
else {
SkipUntil(tok::comma, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
}
// Skip ',' if any
IsComma = Tok.is(tok::comma);
if (IsComma)
ConsumeToken();
else if (Tok.isNot(tok::r_paren) &&
Tok.isNot(tok::annot_pragma_openmp_end) &&
(!MayHaveTail || Tok.isNot(tok::colon)))
Diag(Tok, diag::err_omp_expected_punc)
<< ((Kind == OMPC_flush) ? getOpenMPDirectiveName(OMPD_flush)
: getOpenMPClauseName(Kind))
<< (Kind == OMPC_flush);
}
// Parse ')' for linear clause with modifier.
if (NeedRParenForLinear)
LinearT.consumeClose();
// Parse ':' linear-step (or ':' alignment).
const bool MustHaveTail = MayHaveTail && Tok.is(tok::colon);
if (MustHaveTail) {
Data.ColonLoc = Tok.getLocation();
SourceLocation ELoc = ConsumeToken();
ExprResult Tail = ParseAssignmentExpression();
Tail = Actions.ActOnFinishFullExpr(Tail.get(), ELoc);
if (Tail.isUsable())
Data.TailExpr = Tail.get();
else
SkipUntil(tok::comma, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
}
// Parse ')'.
T.consumeClose();
if ((Kind == OMPC_depend && Data.DepKind != OMPC_DEPEND_unknown &&
Vars.empty()) ||
(Kind != OMPC_depend && Kind != OMPC_map && Vars.empty()) ||
(MustHaveTail && !Data.TailExpr) || InvalidReductionId)
return true;
return false;
}
/// \brief Parsing of OpenMP clause 'private', 'firstprivate', 'lastprivate',
/// 'shared', 'copyin', 'copyprivate', 'flush' or 'reduction'.
///
/// private-clause:
/// 'private' '(' list ')'
/// firstprivate-clause:
/// 'firstprivate' '(' list ')'
/// lastprivate-clause:
/// 'lastprivate' '(' list ')'
/// shared-clause:
/// 'shared' '(' list ')'
/// linear-clause:
/// 'linear' '(' linear-list [ ':' linear-step ] ')'
/// aligned-clause:
/// 'aligned' '(' list [ ':' alignment ] ')'
/// reduction-clause:
/// 'reduction' '(' reduction-identifier ':' list ')'
/// copyprivate-clause:
/// 'copyprivate' '(' list ')'
/// flush-clause:
/// 'flush' '(' list ')'
/// depend-clause:
/// 'depend' '(' in | out | inout : list | source ')'
/// map-clause:
/// 'map' '(' [ [ always , ]
/// to | from | tofrom | alloc | release | delete ':' ] list ')';
/// to-clause:
/// 'to' '(' list ')'
/// from-clause:
/// 'from' '(' list ')'
/// use_device_ptr-clause:
/// 'use_device_ptr' '(' list ')'
/// is_device_ptr-clause:
/// 'is_device_ptr' '(' list ')'
///
/// For 'linear' clause linear-list may have the following forms:
/// list
/// modifier(list)
/// where modifier is 'val' (C) or 'ref', 'val' or 'uval'(C++).
OMPClause *Parser::ParseOpenMPVarListClause(OpenMPDirectiveKind DKind,
OpenMPClauseKind Kind) {
SourceLocation Loc = Tok.getLocation();
SourceLocation LOpen = ConsumeToken();
SmallVector<Expr *, 4> Vars;
OpenMPVarListDataTy Data;
if (ParseOpenMPVarList(DKind, Kind, Vars, Data))
return nullptr;
return Actions.ActOnOpenMPVarListClause(
Kind, Vars, Data.TailExpr, Loc, LOpen, Data.ColonLoc, Tok.getLocation(),
Data.ReductionIdScopeSpec, Data.ReductionId, Data.DepKind, Data.LinKind,
Data.MapTypeModifier, Data.MapType, Data.IsMapTypeImplicit,
Data.DepLinMapLoc);
}