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ParseOpenMP.cpp
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ParseOpenMP.cpp
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//===--- ParseOpenMP.cpp - OpenMP directives parsing ----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements parsing of all OpenMP directives and clauses.
///
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/Parse/ParseDiagnostic.h"
#include "clang/Parse/Parser.h"
#include "clang/Parse/RAIIObjectsForParser.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,
OMPD_teams_distribute_parallel,
OMPD_target_teams_distribute_parallel,
OMPD_mapper,
};
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)
.Case("mapper", OMPD_mapper)
.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_mapper, OMPD_declare_mapper},
{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, OMPD_simd, OMPD_target_simd},
{OMPD_target_parallel, OMPD_for, OMPD_target_parallel_for},
{OMPD_target_parallel_for, OMPD_simd, OMPD_target_parallel_for_simd},
{OMPD_teams, OMPD_distribute, OMPD_teams_distribute},
{OMPD_teams_distribute, OMPD_simd, OMPD_teams_distribute_simd},
{OMPD_teams_distribute, OMPD_parallel, OMPD_teams_distribute_parallel},
{OMPD_teams_distribute_parallel, OMPD_for,
OMPD_teams_distribute_parallel_for},
{OMPD_teams_distribute_parallel_for, OMPD_simd,
OMPD_teams_distribute_parallel_for_simd},
{OMPD_target, OMPD_teams, OMPD_target_teams},
{OMPD_target_teams, OMPD_distribute, OMPD_target_teams_distribute},
{OMPD_target_teams_distribute, OMPD_parallel,
OMPD_target_teams_distribute_parallel},
{OMPD_target_teams_distribute, OMPD_simd,
OMPD_target_teams_distribute_simd},
{OMPD_target_teams_distribute_parallel, OMPD_for,
OMPD_target_teams_distribute_parallel_for},
{OMPD_target_teams_distribute_parallel_for, OMPD_simd,
OMPD_target_teams_distribute_parallel_for_simd}};
enum { CancellationPoint = 0, DeclareReduction = 1, TargetData = 2 };
Token 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;
LLVM_FALLTHROUGH;
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);
}
/// 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, DeclaratorContext::PrototypeContext, AS);
if (TR.isUsable()) {
QualType 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 (Decl *D : DRD.get()) {
TentativeParsingAction TPA(*this);
ParseScope OMPDRScope(this, Scope::FnScope | Scope::DeclScope |
Scope::CompoundStmtScope |
Scope::OpenMPDirectiveScope);
// Parse <combiner> expression.
Actions.ActOnOpenMPDeclareReductionCombinerStart(getCurScope(), D);
ExprResult CombinerResult =
Actions.ActOnFinishFullExpr(ParseAssignmentExpression().get(),
D->getLocation(), /*DiscardedValue*/ false);
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::CompoundStmtScope |
Scope::OpenMPDirectiveScope);
// Parse expression.
VarDecl *OmpPrivParm =
Actions.ActOnOpenMPDeclareReductionInitializerStart(getCurScope(),
D);
// Check if initializer is omp_priv <init_expr> or something else.
if (Tok.is(tok::identifier) &&
Tok.getIdentifierInfo()->isStr("omp_priv")) {
if (Actions.getLangOpts().CPlusPlus) {
InitializerResult = Actions.ActOnFinishFullExpr(
ParseAssignmentExpression().get(), D->getLocation(),
/*DiscardedValue*/ false);
} else {
ConsumeToken();
ParseOpenMPReductionInitializerForDecl(OmpPrivParm);
}
} else {
InitializerResult = Actions.ActOnFinishFullExpr(
ParseAssignmentExpression().get(), D->getLocation(),
/*DiscardedValue*/ false);
}
Actions.ActOnOpenMPDeclareReductionInitializerEnd(
D, InitializerResult.get(), OmpPrivParm);
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);
}
void Parser::ParseOpenMPReductionInitializerForDecl(VarDecl *OmpPrivParm) {
// Parse declarator '=' initializer.
// If a '==' or '+=' is found, suggest a fixit to '='.
if (isTokenEqualOrEqualTypo()) {
ConsumeToken();
if (Tok.is(tok::code_completion)) {
Actions.CodeCompleteInitializer(getCurScope(), OmpPrivParm);
Actions.FinalizeDeclaration(OmpPrivParm);
cutOffParsing();
return;
}
ExprResult Init(ParseInitializer());
if (Init.isInvalid()) {
SkipUntil(tok::r_paren, tok::annot_pragma_openmp_end, StopBeforeMatch);
Actions.ActOnInitializerError(OmpPrivParm);
} else {
Actions.AddInitializerToDecl(OmpPrivParm, Init.get(),
/*DirectInit=*/false);
}
} else if (Tok.is(tok::l_paren)) {
// Parse C++ direct initializer: '(' expression-list ')'
BalancedDelimiterTracker T(*this, tok::l_paren);
T.consumeOpen();
ExprVector Exprs;
CommaLocsTy CommaLocs;
SourceLocation LParLoc = T.getOpenLocation();
if (ParseExpressionList(
Exprs, CommaLocs, [this, OmpPrivParm, LParLoc, &Exprs] {
QualType PreferredType = Actions.ProduceConstructorSignatureHelp(
getCurScope(),
OmpPrivParm->getType()->getCanonicalTypeInternal(),
OmpPrivParm->getLocation(), Exprs, LParLoc);
CalledSignatureHelp = true;
Actions.CodeCompleteExpression(getCurScope(), PreferredType);
})) {
if (PP.isCodeCompletionReached() && !CalledSignatureHelp) {
Actions.ProduceConstructorSignatureHelp(
getCurScope(), OmpPrivParm->getType()->getCanonicalTypeInternal(),
OmpPrivParm->getLocation(), Exprs, LParLoc);
CalledSignatureHelp = true;
}
Actions.ActOnInitializerError(OmpPrivParm);
SkipUntil(tok::r_paren, tok::annot_pragma_openmp_end, StopBeforeMatch);
} else {
// Match the ')'.
SourceLocation RLoc = Tok.getLocation();
if (!T.consumeClose())
RLoc = T.getCloseLocation();
assert(!Exprs.empty() && Exprs.size() - 1 == CommaLocs.size() &&
"Unexpected number of commas!");
ExprResult Initializer =
Actions.ActOnParenListExpr(T.getOpenLocation(), RLoc, Exprs);
Actions.AddInitializerToDecl(OmpPrivParm, Initializer.get(),
/*DirectInit=*/true);
}
} else if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
// Parse C++0x braced-init-list.
Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
ExprResult Init(ParseBraceInitializer());
if (Init.isInvalid()) {
Actions.ActOnInitializerError(OmpPrivParm);
} else {
Actions.AddInitializerToDecl(OmpPrivParm, Init.get(),
/*DirectInit=*/true);
}
} else {
Actions.ActOnUninitializedDecl(OmpPrivParm);
}
}
/// Parses 'omp declare mapper' directive.
///
/// declare-mapper-directive:
/// annot_pragma_openmp 'declare' 'mapper' '(' [<mapper-identifier> ':']
/// <type> <var> ')' [<clause>[[,] <clause>] ... ]
/// annot_pragma_openmp_end
/// <mapper-identifier> and <var> are base language identifiers.
///
Parser::DeclGroupPtrTy
Parser::ParseOpenMPDeclareMapperDirective(AccessSpecifier AS) {
bool IsCorrect = true;
// Parse '('
BalancedDelimiterTracker T(*this, tok::l_paren, tok::annot_pragma_openmp_end);
if (T.expectAndConsume(diag::err_expected_lparen_after,
getOpenMPDirectiveName(OMPD_declare_mapper))) {
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
return DeclGroupPtrTy();
}
// Parse <mapper-identifier>
auto &DeclNames = Actions.getASTContext().DeclarationNames;
DeclarationName MapperId;
if (PP.LookAhead(0).is(tok::colon)) {
if (Tok.isNot(tok::identifier) && Tok.isNot(tok::kw_default)) {
Diag(Tok.getLocation(), diag::err_omp_mapper_illegal_identifier);
IsCorrect = false;
} else {
MapperId = DeclNames.getIdentifier(Tok.getIdentifierInfo());
}
ConsumeToken();
// Consume ':'.
ExpectAndConsume(tok::colon);
} else {
// If no mapper identifier is provided, its name is "default" by default
MapperId =
DeclNames.getIdentifier(&Actions.getASTContext().Idents.get("default"));
}
if (!IsCorrect && Tok.is(tok::annot_pragma_openmp_end))
return DeclGroupPtrTy();
// Parse <type> <var>
DeclarationName VName;
QualType MapperType;
SourceRange Range;
TypeResult ParsedType = parseOpenMPDeclareMapperVarDecl(Range, VName, AS);
if (ParsedType.isUsable())
MapperType =
Actions.ActOnOpenMPDeclareMapperType(Range.getBegin(), ParsedType);
if (MapperType.isNull())
IsCorrect = false;
if (!IsCorrect) {
SkipUntil(tok::annot_pragma_openmp_end, Parser::StopBeforeMatch);
return DeclGroupPtrTy();
}
// Consume ')'.
IsCorrect &= !T.consumeClose();
if (!IsCorrect) {
SkipUntil(tok::annot_pragma_openmp_end, Parser::StopBeforeMatch);
return DeclGroupPtrTy();
}
// Enter scope.
OMPDeclareMapperDecl *DMD = Actions.ActOnOpenMPDeclareMapperDirectiveStart(
getCurScope(), Actions.getCurLexicalContext(), MapperId, MapperType,
Range.getBegin(), VName, AS);
DeclarationNameInfo DirName;
SourceLocation Loc = Tok.getLocation();
unsigned ScopeFlags = Scope::FnScope | Scope::DeclScope |
Scope::CompoundStmtScope | Scope::OpenMPDirectiveScope;
ParseScope OMPDirectiveScope(this, ScopeFlags);
Actions.StartOpenMPDSABlock(OMPD_declare_mapper, DirName, getCurScope(), Loc);
// Add the mapper variable declaration.
Actions.ActOnOpenMPDeclareMapperDirectiveVarDecl(
DMD, getCurScope(), MapperType, Range.getBegin(), VName);
// Parse map clauses.
SmallVector<OMPClause *, 6> Clauses;
while (Tok.isNot(tok::annot_pragma_openmp_end)) {
OpenMPClauseKind CKind = Tok.isAnnotation()
? OMPC_unknown
: getOpenMPClauseKind(PP.getSpelling(Tok));
Actions.StartOpenMPClause(CKind);
OMPClause *Clause =
ParseOpenMPClause(OMPD_declare_mapper, CKind, Clauses.size() == 0);
if (Clause)
Clauses.push_back(Clause);
else
IsCorrect = false;
// Skip ',' if any.
if (Tok.is(tok::comma))
ConsumeToken();
Actions.EndOpenMPClause();
}
if (Clauses.empty()) {
Diag(Tok, diag::err_omp_expected_clause)
<< getOpenMPDirectiveName(OMPD_declare_mapper);
IsCorrect = false;
}
// Exit scope.
Actions.EndOpenMPDSABlock(nullptr);
OMPDirectiveScope.Exit();
DeclGroupPtrTy DGP =
Actions.ActOnOpenMPDeclareMapperDirectiveEnd(DMD, getCurScope(), Clauses);
if (!IsCorrect)
return DeclGroupPtrTy();
return DGP;
}
TypeResult Parser::parseOpenMPDeclareMapperVarDecl(SourceRange &Range,
DeclarationName &Name,
AccessSpecifier AS) {
// Parse the common declaration-specifiers piece.
Parser::DeclSpecContext DSC = Parser::DeclSpecContext::DSC_type_specifier;
DeclSpec DS(AttrFactory);
ParseSpecifierQualifierList(DS, AS, DSC);
// Parse the declarator.
DeclaratorContext Context = DeclaratorContext::PrototypeContext;
Declarator DeclaratorInfo(DS, Context);
ParseDeclarator(DeclaratorInfo);
Range = DeclaratorInfo.getSourceRange();
if (DeclaratorInfo.getIdentifier() == nullptr) {
Diag(Tok.getLocation(), diag::err_omp_mapper_expected_declarator);
return true;
}
Name = Actions.GetNameForDeclarator(DeclaratorInfo).getName();
return Actions.ActOnOpenMPDeclareMapperVarDecl(getCurScope(), DeclaratorInfo);
}
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, Qualifiers(),
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 | Scope::CompoundStmtScope,
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;
SmallVectorImpl<Expr *> *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 = ConsumeAnnotationToken();
if (IsError)
return Ptr;
return Actions.ActOnOpenMPDeclareSimdDirective(
Ptr, BS, Simdlen.get(), Uniforms, Aligneds, Alignments, Linears,
LinModifiers, Steps, SourceRange(Loc, EndLoc));
}
Parser::DeclGroupPtrTy Parser::ParseOMPDeclareTargetClauses() {
// OpenMP 4.5 syntax with list of entities.
Sema::NamedDeclSetType 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,
/*AllowScopeSpecifier=*/true))
break;
// Consume optional ','.
if (Tok.is(tok::comma))
ConsumeToken();
}
SkipUntil(tok::annot_pragma_openmp_end, StopBeforeMatch);
ConsumeAnyToken();
SmallVector<Decl *, 4> Decls(SameDirectiveDecls.begin(),
SameDirectiveDecls.end());
if (Decls.empty())
return DeclGroupPtrTy();
return Actions.BuildDeclaratorGroup(Decls);
}
void Parser::ParseOMPEndDeclareTargetDirective(OpenMPDirectiveKind DKind,
SourceLocation DTLoc) {
if (DKind != OMPD_end_declare_target) {
Diag(Tok, diag::err_expected_end_declare_target);
Diag(DTLoc, diag::note_matching) << "'#pragma omp declare target'";
return;
}
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();
}
/// 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-mapper-directive:
/// annot_pragma_openmp 'declare' 'mapper' '(' [<mapper-identifer> ':']
/// <type> <var> ')' [<clause>[[,] <clause>] ... ]
/// annot_pragma_openmp_end
///
/// declare-simd-directive:
/// annot_pragma_openmp 'declare simd' {<clause> [,]}
/// annot_pragma_openmp_end
/// <function declaration/definition>
///
/// requires directive:
/// annot_pragma_openmp 'requires' <clause> [[[,] <clause>] ... ]
/// annot_pragma_openmp_end
///
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 = ConsumeAnnotationToken();
OpenMPDirectiveKind 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.
ConsumeAnnotationToken();
return Actions.ActOnOpenMPThreadprivateDirective(Loc,
Helper.getIdentifiers());
}
break;
}
case OMPD_requires: {
SourceLocation StartLoc = ConsumeToken();
SmallVector<OMPClause *, 5> Clauses;
SmallVector<llvm::PointerIntPair<OMPClause *, 1, bool>, OMPC_unknown + 1>
FirstClauses(OMPC_unknown + 1);
if (Tok.is(tok::annot_pragma_openmp_end)) {
Diag(Tok, diag::err_omp_expected_clause)
<< getOpenMPDirectiveName(OMPD_requires);
break;
}
while (Tok.isNot(tok::annot_pragma_openmp_end)) {
OpenMPClauseKind CKind = Tok.isAnnotation()
? OMPC_unknown
: getOpenMPClauseKind(PP.getSpelling(Tok));
Actions.StartOpenMPClause(CKind);
OMPClause *Clause =
ParseOpenMPClause(OMPD_requires, CKind, !FirstClauses[CKind].getInt());
SkipUntil(tok::comma, tok::identifier, tok::annot_pragma_openmp_end, StopBeforeMatch);
FirstClauses[CKind].setInt(true);
if (Clause != nullptr)
Clauses.push_back(Clause);
if (Tok.is(tok::annot_pragma_openmp_end)) {
Actions.EndOpenMPClause();
break;
}
// Skip ',' if any.
if (Tok.is(tok::comma))
ConsumeToken();
Actions.EndOpenMPClause();
}
// Consume final annot_pragma_openmp_end
if (Clauses.size() == 0) {
Diag(Tok, diag::err_omp_expected_clause)
<< getOpenMPDirectiveName(OMPD_requires);
ConsumeAnnotationToken();
return nullptr;
}
ConsumeAnnotationToken();
return Actions.ActOnOpenMPRequiresDirective(StartLoc, Clauses);
}
case OMPD_declare_reduction:
ConsumeToken();
if (DeclGroupPtrTy 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.
ConsumeAnnotationToken();
return Res;
}
break;
case OMPD_declare_mapper: {
ConsumeToken();
if (DeclGroupPtrTy Res = ParseOpenMPDeclareMapperDirective(AS)) {
// Skip the last annot_pragma_openmp_end.
ConsumeAnnotationToken();
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);
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)) {
return ParseOMPDeclareTargetClauses();
}
// Skip the last annot_pragma_openmp_end.
ConsumeAnyToken();
if (!Actions.ActOnStartOpenMPDeclareTargetDirective(DTLoc))
return DeclGroupPtrTy();