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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/OpenMPClause.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/Basic/DiagnosticParse.h"
#include "clang/Basic/OpenMPKinds.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TokenKinds.h"
#include "clang/Parse/Parser.h"
#include "clang/Parse/RAIIObjectsForParser.h"
#include "clang/Sema/EnterExpressionEvaluationContext.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/SemaAMDGPU.h"
#include "clang/Sema/SemaCodeCompletion.h"
#include "clang/Sema/SemaOpenMP.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Frontend/OpenMP/OMPAssume.h"
#include "llvm/Frontend/OpenMP/OMPContext.h"
#include <optional>
using namespace clang;
using namespace llvm::omp;
//===----------------------------------------------------------------------===//
// OpenMP declarative directives.
//===----------------------------------------------------------------------===//
namespace {
enum OpenMPDirectiveKindEx {
OMPD_cancellation = llvm::omp::Directive_enumSize + 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,
OMPD_variant,
OMPD_begin,
OMPD_begin_declare,
};
// Helper to unify the enum class OpenMPDirectiveKind with its extension
// the OpenMPDirectiveKindEx enum which allows to use them together as if they
// are unsigned values.
struct OpenMPDirectiveKindExWrapper {
OpenMPDirectiveKindExWrapper(unsigned Value) : Value(Value) {}
OpenMPDirectiveKindExWrapper(OpenMPDirectiveKind DK) : Value(unsigned(DK)) {}
bool operator==(OpenMPDirectiveKindExWrapper V) const {
return Value == V.Value;
}
bool operator!=(OpenMPDirectiveKindExWrapper V) const {
return Value != V.Value;
}
bool operator==(OpenMPDirectiveKind V) const { return Value == unsigned(V); }
bool operator!=(OpenMPDirectiveKind V) const { return Value != unsigned(V); }
bool operator<(OpenMPDirectiveKind V) const { return Value < unsigned(V); }
operator unsigned() const { return Value; }
operator OpenMPDirectiveKind() const { return OpenMPDirectiveKind(Value); }
unsigned Value;
};
class DeclDirectiveListParserHelper final {
SmallVector<Expr *, 4> Identifiers;
Parser *P;
OpenMPDirectiveKind Kind;
public:
DeclDirectiveListParserHelper(Parser *P, OpenMPDirectiveKind Kind)
: P(P), Kind(Kind) {}
void operator()(CXXScopeSpec &SS, DeclarationNameInfo NameInfo) {
ExprResult Res = P->getActions().OpenMP().ActOnOpenMPIdExpression(
P->getCurScope(), SS, NameInfo, Kind);
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) {
OpenMPDirectiveKindExWrapper DKind = getOpenMPDirectiveKind(S);
if (DKind != OMPD_unknown)
return DKind;
return llvm::StringSwitch<OpenMPDirectiveKindExWrapper>(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)
.Case("variant", OMPD_variant)
.Case("begin", OMPD_begin)
.Default(OMPD_unknown);
}
static OpenMPDirectiveKindExWrapper 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 OpenMPDirectiveKindExWrapper F[][3] = {
{OMPD_begin, OMPD_declare, OMPD_begin_declare},
{OMPD_begin, OMPD_assumes, OMPD_begin_assumes},
{OMPD_end, OMPD_declare, OMPD_end_declare},
{OMPD_end, OMPD_assumes, OMPD_end_assumes},
{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_declare, OMPD_variant, OMPD_declare_variant},
{OMPD_begin_declare, OMPD_target, OMPD_begin_declare_target},
{OMPD_begin_declare, OMPD_variant, OMPD_begin_declare_variant},
{OMPD_end_declare, OMPD_variant, OMPD_end_declare_variant},
{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_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_loop, OMPD_parallel_loop},
{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_loop, OMPD_target_parallel_loop},
{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_teams, OMPD_loop, OMPD_teams_loop},
{OMPD_target, OMPD_teams, OMPD_target_teams},
{OMPD_target_teams, OMPD_distribute, OMPD_target_teams_distribute},
{OMPD_target_teams, OMPD_loop, OMPD_target_teams_loop},
{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},
{OMPD_master, OMPD_taskloop, OMPD_master_taskloop},
{OMPD_masked, OMPD_taskloop, OMPD_masked_taskloop},
{OMPD_master_taskloop, OMPD_simd, OMPD_master_taskloop_simd},
{OMPD_masked_taskloop, OMPD_simd, OMPD_masked_taskloop_simd},
{OMPD_parallel, OMPD_master, OMPD_parallel_master},
{OMPD_parallel, OMPD_masked, OMPD_parallel_masked},
{OMPD_parallel_master, OMPD_taskloop, OMPD_parallel_master_taskloop},
{OMPD_parallel_masked, OMPD_taskloop, OMPD_parallel_masked_taskloop},
{OMPD_parallel_master_taskloop, OMPD_simd,
OMPD_parallel_master_taskloop_simd},
{OMPD_parallel_masked_taskloop, OMPD_simd,
OMPD_parallel_masked_taskloop_simd}};
enum { CancellationPoint = 0, DeclareReduction = 1, TargetData = 2 };
Token Tok = P.getCurToken();
OpenMPDirectiveKindExWrapper DKind =
Tok.isAnnotation()
? static_cast<unsigned>(OMPD_unknown)
: getOpenMPDirectiveKindEx(P.getPreprocessor().getSpelling(Tok));
if (DKind == OMPD_unknown)
return OMPD_unknown;
for (const auto &I : F) {
if (DKind != I[0])
continue;
Tok = P.getPreprocessor().LookAhead(0);
OpenMPDirectiveKindExWrapper SDKind =
Tok.isAnnotation()
? static_cast<unsigned>(OMPD_unknown)
: getOpenMPDirectiveKindEx(P.getPreprocessor().getSpelling(Tok));
if (SDKind == OMPD_unknown)
continue;
if (SDKind == I[1]) {
P.ConsumeToken();
DKind = I[2];
}
}
return unsigned(DKind) < llvm::omp::Directive_enumSize
? 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;
[[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).data())) {
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::Prototype, AS);
if (TR.isUsable()) {
QualType ReductionType = Actions.OpenMP().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.OpenMP().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.OpenMP().ActOnOpenMPDeclareReductionCombinerStart(getCurScope(), D);
ExprResult CombinerResult = Actions.ActOnFinishFullExpr(
ParseExpression().get(), D->getLocation(), /*DiscardedValue*/ false);
Actions.OpenMP().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.OpenMP().ActOnOpenMPDeclareReductionInitializerStart(
getCurScope(), D);
// Check if initializer is omp_priv <init_expr> or something else.
if (Tok.is(tok::identifier) &&
Tok.getIdentifierInfo()->isStr("omp_priv")) {
ConsumeToken();
ParseOpenMPReductionInitializerForDecl(OmpPrivParm);
} else {
InitializerResult = Actions.ActOnFinishFullExpr(
ParseAssignmentExpression().get(), D->getLocation(),
/*DiscardedValue*/ false);
}
Actions.OpenMP().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.OpenMP().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)) {
cutOffParsing();
Actions.CodeCompletion().CodeCompleteInitializer(getCurScope(),
OmpPrivParm);
Actions.FinalizeDeclaration(OmpPrivParm);
return;
}
PreferredType.enterVariableInit(Tok.getLocation(), OmpPrivParm);
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;
SourceLocation LParLoc = T.getOpenLocation();
auto RunSignatureHelp = [this, OmpPrivParm, LParLoc, &Exprs]() {
QualType PreferredType =
Actions.CodeCompletion().ProduceConstructorSignatureHelp(
OmpPrivParm->getType()->getCanonicalTypeInternal(),
OmpPrivParm->getLocation(), Exprs, LParLoc, /*Braced=*/false);
CalledSignatureHelp = true;
return PreferredType;
};
if (ParseExpressionList(Exprs, [&] {
PreferredType.enterFunctionArgument(Tok.getLocation(),
RunSignatureHelp);
})) {
if (PP.isCodeCompletionReached() && !CalledSignatureHelp)
RunSignatureHelp();
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();
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).data())) {
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.OpenMP().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.
DeclarationNameInfo DirName;
SourceLocation Loc = Tok.getLocation();
unsigned ScopeFlags = Scope::FnScope | Scope::DeclScope |
Scope::CompoundStmtScope | Scope::OpenMPDirectiveScope;
ParseScope OMPDirectiveScope(this, ScopeFlags);
Actions.OpenMP().StartOpenMPDSABlock(OMPD_declare_mapper, DirName,
getCurScope(), Loc);
// Add the mapper variable declaration.
ExprResult MapperVarRef =
Actions.OpenMP().ActOnOpenMPDeclareMapperDirectiveVarDecl(
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.OpenMP().StartOpenMPClause(CKind);
OMPClause *Clause =
ParseOpenMPClause(OMPD_declare_mapper, CKind, Clauses.empty());
if (Clause)
Clauses.push_back(Clause);
else
IsCorrect = false;
// Skip ',' if any.
if (Tok.is(tok::comma))
ConsumeToken();
Actions.OpenMP().EndOpenMPClause();
}
if (Clauses.empty()) {
Diag(Tok, diag::err_omp_expected_clause)
<< getOpenMPDirectiveName(OMPD_declare_mapper);
IsCorrect = false;
}
// Exit scope.
Actions.OpenMP().EndOpenMPDSABlock(nullptr);
OMPDirectiveScope.Exit();
DeclGroupPtrTy DG = Actions.OpenMP().ActOnOpenMPDeclareMapperDirective(
getCurScope(), Actions.getCurLexicalContext(), MapperId, MapperType,
Range.getBegin(), VName, AS, MapperVarRef.get(), Clauses);
if (!IsCorrect)
return DeclGroupPtrTy();
return DG;
}
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::Prototype;
Declarator DeclaratorInfo(DS, ParsedAttributesView::none(), 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.OpenMP().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::MultiParseScope Scopes;
bool HasFunScope = false;
FNContextRAII() = delete;
FNContextRAII(const FNContextRAII &) = delete;
FNContextRAII &operator=(const FNContextRAII &) = delete;
public:
FNContextRAII(Parser &P, Parser::DeclGroupPtrTy Ptr) : P(P), Scopes(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.
// FIXME: Track CurTemplateDepth?
P.ReenterTemplateScopes(Scopes, D);
// If the Decl is on a function, add function parameters to the scope.
if (D->isFunctionOrFunctionTemplate()) {
HasFunScope = true;
Scopes.Enter(Scope::FnScope | Scope::DeclScope |
Scope::CompoundStmtScope);
Actions.ActOnReenterFunctionContext(Actions.getCurScope(), D);
}
}
~FNContextRAII() {
if (HasFunScope)
P.getActions().ActOnExitFunctionContext();
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 == "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) {
SemaOpenMP::OpenMPVarListDataTy Data;
SmallVectorImpl<Expr *> *Vars = &Uniforms;
if (CKind == OMPC_aligned) {
Vars = &Aligneds;
} else if (CKind == OMPC_linear) {
Data.ExtraModifier = OMPC_LINEAR_val;
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.DepModOrTailExpr);
} else if (CKind == OMPC_linear) {
assert(0 <= Data.ExtraModifier &&
Data.ExtraModifier <= OMPC_LINEAR_unknown &&
"Unexpected linear modifier.");
if (P.getActions().OpenMP().CheckOpenMPLinearModifier(
static_cast<OpenMPLinearClauseKind>(Data.ExtraModifier),
Data.ExtraModifierLoc))
Data.ExtraModifier = OMPC_LINEAR_val;
LinModifiers.append(Linears.size() - LinModifiers.size(),
Data.ExtraModifier);
Steps.append(Linears.size() - Steps.size(), Data.DepModOrTailExpr);
}
} 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, /*IsReinject*/ true);
PP.EnterTokenStream(Toks, /*DisableMacroExpansion=*/true,
/*IsReinject*/ true);
// Consume the previously pushed token.
ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
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);
skipUntilPragmaOpenMPEnd(OMPD_declare_simd);
// Skip the last annot_pragma_openmp_end.
SourceLocation EndLoc = ConsumeAnnotationToken();
if (IsError)
return Ptr;
return Actions.OpenMP().ActOnOpenMPDeclareSimdDirective(
Ptr, BS, Simdlen.get(), Uniforms, Aligneds, Alignments, Linears,
LinModifiers, Steps, SourceRange(Loc, EndLoc));
}
namespace {
/// Constant used in the diagnostics to distinguish the levels in an OpenMP
/// contexts: selector-set={selector(trait, ...), ...}, ....
enum OMPContextLvl {
CONTEXT_SELECTOR_SET_LVL = 0,
CONTEXT_SELECTOR_LVL = 1,
CONTEXT_TRAIT_LVL = 2,
};
static StringRef stringLiteralParser(Parser &P) {
ExprResult Res = P.ParseStringLiteralExpression(true);
return Res.isUsable() ? Res.getAs<StringLiteral>()->getString() : "";
}
static StringRef getNameFromIdOrString(Parser &P, Token &Tok,
OMPContextLvl Lvl) {
if (Tok.is(tok::identifier) || Tok.is(tok::kw_for)) {
llvm::SmallString<16> Buffer;
StringRef Name = P.getPreprocessor().getSpelling(Tok, Buffer);
(void)P.ConsumeToken();
return Name;
}
if (tok::isStringLiteral(Tok.getKind()))
return stringLiteralParser(P);
P.Diag(Tok.getLocation(),
diag::warn_omp_declare_variant_string_literal_or_identifier)
<< Lvl;
return "";
}
static bool checkForDuplicates(Parser &P, StringRef Name,
SourceLocation NameLoc,
llvm::StringMap<SourceLocation> &Seen,
OMPContextLvl Lvl) {
auto Res = Seen.try_emplace(Name, NameLoc);
if (Res.second)
return false;
// Each trait-set-selector-name, trait-selector-name and trait-name can
// only be specified once.
P.Diag(NameLoc, diag::warn_omp_declare_variant_ctx_mutiple_use)
<< Lvl << Name;
P.Diag(Res.first->getValue(), diag::note_omp_declare_variant_ctx_used_here)
<< Lvl << Name;
return true;
}
} // namespace
void Parser::parseOMPTraitPropertyKind(OMPTraitProperty &TIProperty,
llvm::omp::TraitSet Set,
llvm::omp::TraitSelector Selector,
llvm::StringMap<SourceLocation> &Seen) {
TIProperty.Kind = TraitProperty::invalid;
SourceLocation NameLoc = Tok.getLocation();
StringRef Name;
if (Selector == llvm::omp::TraitSelector::target_device_device_num) {
Name = "number";
TIProperty.Kind = getOpenMPContextTraitPropertyKind(Set, Selector, Name);
ExprResult DeviceNumExprResult = ParseExpression();
if (DeviceNumExprResult.isUsable()) {
Expr *DeviceNumExpr = DeviceNumExprResult.get();
Actions.OpenMP().ActOnOpenMPDeviceNum(DeviceNumExpr);
}
return;
}
Name = getNameFromIdOrString(*this, Tok, CONTEXT_TRAIT_LVL);
if (Name.empty()) {
Diag(Tok.getLocation(), diag::note_omp_declare_variant_ctx_options)
<< CONTEXT_TRAIT_LVL << listOpenMPContextTraitProperties(Set, Selector);
return;
}
TIProperty.RawString = Name;
TIProperty.Kind = getOpenMPContextTraitPropertyKind(Set, Selector, Name);
if (TIProperty.Kind != TraitProperty::invalid) {
if (checkForDuplicates(*this, Name, NameLoc, Seen, CONTEXT_TRAIT_LVL))
TIProperty.Kind = TraitProperty::invalid;
return;
}
// It follows diagnosis and helping notes.
// FIXME: We should move the diagnosis string generation into libFrontend.
Diag(NameLoc, diag::warn_omp_declare_variant_ctx_not_a_property)
<< Name << getOpenMPContextTraitSelectorName(Selector)
<< getOpenMPContextTraitSetName(Set);
TraitSet SetForName = getOpenMPContextTraitSetKind(Name);
if (SetForName != TraitSet::invalid) {
Diag(NameLoc, diag::note_omp_declare_variant_ctx_is_a)
<< Name << CONTEXT_SELECTOR_SET_LVL << CONTEXT_TRAIT_LVL;
Diag(NameLoc, diag::note_omp_declare_variant_ctx_try)
<< Name << "<selector-name>"
<< "(<property-name>)";
return;
}
TraitSelector SelectorForName =
getOpenMPContextTraitSelectorKind(Name, SetForName);
if (SelectorForName != TraitSelector::invalid) {
Diag(NameLoc, diag::note_omp_declare_variant_ctx_is_a)
<< Name << CONTEXT_SELECTOR_LVL << CONTEXT_TRAIT_LVL;
bool AllowsTraitScore = false;
bool RequiresProperty = false;
isValidTraitSelectorForTraitSet(
SelectorForName, getOpenMPContextTraitSetForSelector(SelectorForName),
AllowsTraitScore, RequiresProperty);
Diag(NameLoc, diag::note_omp_declare_variant_ctx_try)
<< getOpenMPContextTraitSetName(
getOpenMPContextTraitSetForSelector(SelectorForName))
<< Name << (RequiresProperty ? "(<property-name>)" : "");
return;
}
for (const auto &PotentialSet :
{TraitSet::construct, TraitSet::user, TraitSet::implementation,
TraitSet::device, TraitSet::target_device}) {
TraitProperty PropertyForName =
getOpenMPContextTraitPropertyKind(PotentialSet, Selector, Name);
if (PropertyForName == TraitProperty::invalid)
continue;
Diag(NameLoc, diag::note_omp_declare_variant_ctx_try)
<< getOpenMPContextTraitSetName(
getOpenMPContextTraitSetForProperty(PropertyForName))
<< getOpenMPContextTraitSelectorName(
getOpenMPContextTraitSelectorForProperty(PropertyForName))
<< ("(" + Name + ")").str();
return;
}
Diag(NameLoc, diag::note_omp_declare_variant_ctx_options)
<< CONTEXT_TRAIT_LVL << listOpenMPContextTraitProperties(Set, Selector);
}
static bool checkExtensionProperty(Parser &P, SourceLocation Loc,
OMPTraitProperty &TIProperty,
OMPTraitSelector &TISelector,
llvm::StringMap<SourceLocation> &Seen) {
assert(TISelector.Kind ==
llvm::omp::TraitSelector::implementation_extension &&
"Only for extension properties, e.g., "
"`implementation={extension(PROPERTY)}`");
if (TIProperty.Kind == TraitProperty::invalid)
return false;
if (TIProperty.Kind ==
TraitProperty::implementation_extension_disable_implicit_base)
return true;
if (TIProperty.Kind ==
TraitProperty::implementation_extension_allow_templates)
return true;
if (TIProperty.Kind ==
TraitProperty::implementation_extension_bind_to_declaration)
return true;
auto IsMatchExtension = [](OMPTraitProperty &TP) {
return (TP.Kind ==
llvm::omp::TraitProperty::implementation_extension_match_all ||
TP.Kind ==
llvm::omp::TraitProperty::implementation_extension_match_any ||
TP.Kind ==
llvm::omp::TraitProperty::implementation_extension_match_none);
};
if (IsMatchExtension(TIProperty)) {
for (OMPTraitProperty &SeenProp : TISelector.Properties)