//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "resolve-directives.h"
#include "check-acc-structure.h"
#include "check-omp-structure.h"
#include "resolve-names-utils.h"
#include "flang/Common/idioms.h"
#include "flang/Evaluate/fold.h"
#include "flang/Evaluate/tools.h"
#include "flang/Evaluate/type.h"
#include "flang/Parser/parse-tree-visitor.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Parser/tools.h"
#include "flang/Semantics/expression.h"
#include "flang/Semantics/tools.h"
#include <list>
#include <map>
#include <sstream>
template <typename T>
static Fortran::semantics::Scope *GetScope(
Fortran::semantics::SemanticsContext &context, const T &x) {
std::optional<Fortran::parser::CharBlock> source{GetLastSource(x)};
return source ? &context.FindScope(*source) : nullptr;
}
namespace Fortran::semantics {
template <typename T> class DirectiveAttributeVisitor {
public:
explicit DirectiveAttributeVisitor(SemanticsContext &context)
: context_{context} {}
template <typename A> bool Pre(const A &) { return true; }
template <typename A> void Post(const A &) {}
protected:
struct DirContext {
DirContext(const parser::CharBlock &source, T d, Scope &s)
: directiveSource{source}, directive{d}, scope{s} {}
parser::CharBlock directiveSource;
T directive;
Scope &scope;
Symbol::Flag defaultDSA{Symbol::Flag::AccShared}; // TODOACC
std::map<const Symbol *, Symbol::Flag> objectWithDSA;
bool withinConstruct{false};
std::int64_t associatedLoopLevel{0};
};
DirContext &GetContext() {
CHECK(!dirContext_.empty());
return dirContext_.back();
}
std::optional<DirContext> GetContextIf() {
return dirContext_.empty()
? std::nullopt
: std::make_optional<DirContext>(dirContext_.back());
}
void PushContext(const parser::CharBlock &source, T dir, Scope &scope) {
dirContext_.emplace_back(source, dir, scope);
}
void PushContext(const parser::CharBlock &source, T dir) {
dirContext_.emplace_back(source, dir, context_.FindScope(source));
}
void PopContext() { dirContext_.pop_back(); }
void SetContextDirectiveSource(parser::CharBlock &dir) {
GetContext().directiveSource = dir;
}
Scope &currScope() { return GetContext().scope; }
void SetContextDefaultDSA(Symbol::Flag flag) {
GetContext().defaultDSA = flag;
}
void AddToContextObjectWithDSA(
const Symbol &symbol, Symbol::Flag flag, DirContext &context) {
context.objectWithDSA.emplace(&symbol, flag);
}
void AddToContextObjectWithDSA(const Symbol &symbol, Symbol::Flag flag) {
AddToContextObjectWithDSA(symbol, flag, GetContext());
}
bool IsObjectWithDSA(const Symbol &symbol) {
auto it{GetContext().objectWithDSA.find(&symbol)};
return it != GetContext().objectWithDSA.end();
}
void SetContextAssociatedLoopLevel(std::int64_t level) {
GetContext().associatedLoopLevel = level;
}
Symbol &MakeAssocSymbol(
const SourceName &name, const Symbol &prev, Scope &scope) {
const auto pair{scope.try_emplace(name, Attrs{}, HostAssocDetails{prev})};
return *pair.first->second;
}
Symbol &MakeAssocSymbol(const SourceName &name, const Symbol &prev) {
return MakeAssocSymbol(name, prev, currScope());
}
void AddDataSharingAttributeObject(SymbolRef object) {
dataSharingAttributeObjects_.insert(object);
}
void ClearDataSharingAttributeObjects() {
dataSharingAttributeObjects_.clear();
}
bool HasDataSharingAttributeObject(const Symbol &);
const parser::Name *GetLoopIndex(const parser::DoConstruct &);
const parser::DoConstruct *GetDoConstructIf(
const parser::ExecutionPartConstruct &);
Symbol *DeclareNewPrivateAccessEntity(const Symbol &, Symbol::Flag, Scope &);
Symbol *DeclarePrivateAccessEntity(
const parser::Name &, Symbol::Flag, Scope &);
Symbol *DeclarePrivateAccessEntity(Symbol &, Symbol::Flag, Scope &);
Symbol *DeclareOrMarkOtherAccessEntity(const parser::Name &, Symbol::Flag);
UnorderedSymbolSet dataSharingAttributeObjects_; // on one directive
SemanticsContext &context_;
std::vector<DirContext> dirContext_; // used as a stack
};
class AccAttributeVisitor : DirectiveAttributeVisitor<llvm::acc::Directive> {
public:
explicit AccAttributeVisitor(SemanticsContext &context, Scope *topScope)
: DirectiveAttributeVisitor(context), topScope_(topScope) {}
template <typename A> void Walk(const A &x) { parser::Walk(x, *this); }
template <typename A> bool Pre(const A &) { return true; }
template <typename A> void Post(const A &) {}
bool Pre(const parser::OpenACCBlockConstruct &);
void Post(const parser::OpenACCBlockConstruct &) { PopContext(); }
bool Pre(const parser::OpenACCCombinedConstruct &);
void Post(const parser::OpenACCCombinedConstruct &) { PopContext(); }
bool Pre(const parser::OpenACCDeclarativeConstruct &);
void Post(const parser::OpenACCDeclarativeConstruct &) { PopContext(); }
void Post(const parser::AccDeclarativeDirective &) {
GetContext().withinConstruct = true;
}
bool Pre(const parser::OpenACCRoutineConstruct &);
bool Pre(const parser::AccBindClause &);
void Post(const parser::OpenACCStandaloneDeclarativeConstruct &);
void Post(const parser::AccBeginBlockDirective &) {
GetContext().withinConstruct = true;
}
bool Pre(const parser::OpenACCLoopConstruct &);
void Post(const parser::OpenACCLoopConstruct &) { PopContext(); }
void Post(const parser::AccLoopDirective &) {
GetContext().withinConstruct = true;
}
bool Pre(const parser::OpenACCStandaloneConstruct &);
void Post(const parser::OpenACCStandaloneConstruct &) { PopContext(); }
void Post(const parser::AccStandaloneDirective &) {
GetContext().withinConstruct = true;
}
bool Pre(const parser::OpenACCCacheConstruct &);
void Post(const parser::OpenACCCacheConstruct &) { PopContext(); }
void Post(const parser::AccDefaultClause &);
bool Pre(const parser::AccClause::Attach &);
bool Pre(const parser::AccClause::Detach &);
bool Pre(const parser::AccClause::Copy &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccCopy);
return false;
}
bool Pre(const parser::AccClause::Create &x) {
const auto &objectList{std::get<parser::AccObjectList>(x.v.t)};
ResolveAccObjectList(objectList, Symbol::Flag::AccCreate);
return false;
}
bool Pre(const parser::AccClause::Copyin &x) {
const auto &objectList{std::get<parser::AccObjectList>(x.v.t)};
const auto &modifier{
std::get<std::optional<parser::AccDataModifier>>(x.v.t)};
if (modifier &&
(*modifier).v == parser::AccDataModifier::Modifier::ReadOnly) {
ResolveAccObjectList(objectList, Symbol::Flag::AccCopyInReadOnly);
} else {
ResolveAccObjectList(objectList, Symbol::Flag::AccCopyIn);
}
return false;
}
bool Pre(const parser::AccClause::Copyout &x) {
const auto &objectList{std::get<parser::AccObjectList>(x.v.t)};
ResolveAccObjectList(objectList, Symbol::Flag::AccCopyOut);
return false;
}
bool Pre(const parser::AccClause::Present &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccPresent);
return false;
}
bool Pre(const parser::AccClause::Private &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccPrivate);
return false;
}
bool Pre(const parser::AccClause::Firstprivate &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccFirstPrivate);
return false;
}
bool Pre(const parser::AccClause::Device &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccDevice);
return false;
}
bool Pre(const parser::AccClause::DeviceResident &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccDeviceResident);
return false;
}
bool Pre(const parser::AccClause::Deviceptr &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccDevicePtr);
return false;
}
bool Pre(const parser::AccClause::Link &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccLink);
return false;
}
bool Pre(const parser::AccClause::Host &x) {
ResolveAccObjectList(x.v, Symbol::Flag::AccHost);
return false;
}
bool Pre(const parser::AccClause::Self &x) {
const std::optional<parser::AccSelfClause> &accSelfClause = x.v;
if (accSelfClause &&
std::holds_alternative<parser::AccObjectList>((*accSelfClause).u)) {
const auto &accObjectList =
std::get<parser::AccObjectList>((*accSelfClause).u);
ResolveAccObjectList(accObjectList, Symbol::Flag::AccSelf);
}
return false;
}
void Post(const parser::Name &);
private:
std::int64_t GetAssociatedLoopLevelFromClauses(const parser::AccClauseList &);
Symbol::Flags dataSharingAttributeFlags{Symbol::Flag::AccShared,
Symbol::Flag::AccPrivate, Symbol::Flag::AccFirstPrivate,
Symbol::Flag::AccReduction};
Symbol::Flags dataMappingAttributeFlags{Symbol::Flag::AccCreate,
Symbol::Flag::AccCopyIn, Symbol::Flag::AccCopyOut,
Symbol::Flag::AccDelete, Symbol::Flag::AccPresent};
Symbol::Flags accDataMvtFlags{
Symbol::Flag::AccDevice, Symbol::Flag::AccHost, Symbol::Flag::AccSelf};
Symbol::Flags accFlagsRequireMark{Symbol::Flag::AccCreate,
Symbol::Flag::AccCopyIn, Symbol::Flag::AccCopyInReadOnly,
Symbol::Flag::AccCopy, Symbol::Flag::AccCopyOut,
Symbol::Flag::AccDevicePtr, Symbol::Flag::AccDeviceResident,
Symbol::Flag::AccLink, Symbol::Flag::AccPresent};
void CheckAssociatedLoop(const parser::DoConstruct &);
void ResolveAccObjectList(const parser::AccObjectList &, Symbol::Flag);
void ResolveAccObject(const parser::AccObject &, Symbol::Flag);
Symbol *ResolveAcc(const parser::Name &, Symbol::Flag, Scope &);
Symbol *ResolveAcc(Symbol &, Symbol::Flag, Scope &);
Symbol *ResolveName(const parser::Name &, bool parentScope = false);
Symbol *ResolveFctName(const parser::Name &);
Symbol *ResolveAccCommonBlockName(const parser::Name *);
Symbol *DeclareOrMarkOtherAccessEntity(const parser::Name &, Symbol::Flag);
Symbol *DeclareOrMarkOtherAccessEntity(Symbol &, Symbol::Flag);
void CheckMultipleAppearances(
const parser::Name &, const Symbol &, Symbol::Flag);
void AllowOnlyArrayAndSubArray(const parser::AccObjectList &objectList);
void DoNotAllowAssumedSizedArray(const parser::AccObjectList &objectList);
void AllowOnlyVariable(const parser::AccObject &object);
void EnsureAllocatableOrPointer(
const llvm::acc::Clause clause, const parser::AccObjectList &objectList);
void AddRoutineInfoToSymbol(
Symbol &, const parser::OpenACCRoutineConstruct &);
Scope *topScope_;
};
// Data-sharing and Data-mapping attributes for data-refs in OpenMP construct
class OmpAttributeVisitor : DirectiveAttributeVisitor<llvm::omp::Directive> {
public:
explicit OmpAttributeVisitor(SemanticsContext &context)
: DirectiveAttributeVisitor(context) {}
template <typename A> void Walk(const A &x) { parser::Walk(x, *this); }
template <typename A> bool Pre(const A &) { return true; }
template <typename A> void Post(const A &) {}
template <typename A> bool Pre(const parser::Statement<A> &statement) {
currentStatementSource_ = statement.source;
// Keep track of the labels in all the labelled statements
if (statement.label) {
auto label{statement.label.value()};
// Get the context to check if the labelled statement is in an
// enclosing OpenMP construct
std::optional<DirContext> thisContext{GetContextIf()};
targetLabels_.emplace(
label, std::make_pair(currentStatementSource_, thisContext));
// Check if a statement that causes a jump to the 'label'
// has already been encountered
auto range{sourceLabels_.equal_range(label)};
for (auto it{range.first}; it != range.second; ++it) {
// Check if both the statement with 'label' and the statement that
// causes a jump to the 'label' are in the same scope
CheckLabelContext(it->second.first, currentStatementSource_,
it->second.second, thisContext);
}
}
return true;
}
bool Pre(const parser::InternalSubprogram &) {
// Clear the labels being tracked in the previous scope
ClearLabels();
return true;
}
bool Pre(const parser::ModuleSubprogram &) {
// Clear the labels being tracked in the previous scope
ClearLabels();
return true;
}
bool Pre(const parser::StmtFunctionStmt &x) {
const auto &parsedExpr{std::get<parser::Scalar<parser::Expr>>(x.t)};
if (const auto *expr{GetExpr(context_, parsedExpr)}) {
for (const Symbol &symbol : evaluate::CollectSymbols(*expr)) {
if (!IsStmtFunctionDummy(symbol)) {
stmtFunctionExprSymbols_.insert(symbol.GetUltimate());
}
}
}
return true;
}
bool Pre(const parser::OpenMPBlockConstruct &);
void Post(const parser::OpenMPBlockConstruct &);
void Post(const parser::OmpBeginBlockDirective &) {
GetContext().withinConstruct = true;
}
bool Pre(const parser::OpenMPSimpleStandaloneConstruct &);
void Post(const parser::OpenMPSimpleStandaloneConstruct &) { PopContext(); }
bool Pre(const parser::OpenMPLoopConstruct &);
void Post(const parser::OpenMPLoopConstruct &) { PopContext(); }
void Post(const parser::OmpBeginLoopDirective &) {
GetContext().withinConstruct = true;
}
bool Pre(const parser::DoConstruct &);
bool Pre(const parser::OpenMPSectionsConstruct &);
void Post(const parser::OpenMPSectionsConstruct &) { PopContext(); }
bool Pre(const parser::OpenMPCriticalConstruct &critical);
void Post(const parser::OpenMPCriticalConstruct &) { PopContext(); }
bool Pre(const parser::OpenMPDeclareSimdConstruct &x) {
PushContext(x.source, llvm::omp::Directive::OMPD_declare_simd);
const auto &name{std::get<std::optional<parser::Name>>(x.t)};
if (name) {
ResolveOmpName(*name, Symbol::Flag::OmpDeclareSimd);
}
return true;
}
void Post(const parser::OpenMPDeclareSimdConstruct &) { PopContext(); }
bool Pre(const parser::OpenMPRequiresConstruct &x) {
using Flags = WithOmpDeclarative::RequiresFlags;
using Requires = WithOmpDeclarative::RequiresFlag;
PushContext(x.source, llvm::omp::Directive::OMPD_requires);
// Gather information from the clauses.
Flags flags;
std::optional<common::OmpAtomicDefaultMemOrderType> memOrder;
for (const auto &clause : std::get<parser::OmpClauseList>(x.t).v) {
flags |= common::visit(
common::visitors{
[&memOrder](
const parser::OmpClause::AtomicDefaultMemOrder &atomic) {
memOrder = atomic.v.v;
return Flags{};
},
[](const parser::OmpClause::ReverseOffload &) {
return Flags{Requires::ReverseOffload};
},
[](const parser::OmpClause::UnifiedAddress &) {
return Flags{Requires::UnifiedAddress};
},
[](const parser::OmpClause::UnifiedSharedMemory &) {
return Flags{Requires::UnifiedSharedMemory};
},
[](const parser::OmpClause::DynamicAllocators &) {
return Flags{Requires::DynamicAllocators};
},
[](const auto &) { return Flags{}; }},
clause.u);
}
// Merge clauses into parents' symbols details.
AddOmpRequiresToScope(currScope(), flags, memOrder);
return true;
}
void Post(const parser::OpenMPRequiresConstruct &) { PopContext(); }
bool Pre(const parser::OpenMPDeclareTargetConstruct &);
void Post(const parser::OpenMPDeclareTargetConstruct &) { PopContext(); }
bool Pre(const parser::OpenMPThreadprivate &);
void Post(const parser::OpenMPThreadprivate &) { PopContext(); }
bool Pre(const parser::OpenMPDeclarativeAllocate &);
void Post(const parser::OpenMPDeclarativeAllocate &) { PopContext(); }
bool Pre(const parser::OpenMPExecutableAllocate &);
void Post(const parser::OpenMPExecutableAllocate &);
bool Pre(const parser::OpenMPAllocatorsConstruct &);
void Post(const parser::OpenMPAllocatorsConstruct &);
// 2.15.3 Data-Sharing Attribute Clauses
void Post(const parser::OmpDefaultClause &);
bool Pre(const parser::OmpClause::Shared &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpShared);
return false;
}
bool Pre(const parser::OmpClause::Private &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpPrivate);
return false;
}
bool Pre(const parser::OmpAllocateClause &x) {
const auto &objectList{std::get<parser::OmpObjectList>(x.t)};
ResolveOmpObjectList(objectList, Symbol::Flag::OmpAllocate);
return false;
}
bool Pre(const parser::OmpClause::Firstprivate &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpFirstPrivate);
return false;
}
bool Pre(const parser::OmpClause::Lastprivate &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpLastPrivate);
return false;
}
bool Pre(const parser::OmpClause::Copyin &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpCopyIn);
return false;
}
bool Pre(const parser::OmpClause::Copyprivate &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpCopyPrivate);
return false;
}
bool Pre(const parser::OmpLinearClause &x) {
common::visit(common::visitors{
[&](const parser::OmpLinearClause::WithoutModifier
&linearWithoutModifier) {
ResolveOmpNameList(linearWithoutModifier.names,
Symbol::Flag::OmpLinear);
},
[&](const parser::OmpLinearClause::WithModifier
&linearWithModifier) {
ResolveOmpNameList(
linearWithModifier.names, Symbol::Flag::OmpLinear);
},
},
x.u);
return false;
}
bool Pre(const parser::OmpClause::Reduction &x) {
const parser::OmpReductionOperator &opr{
std::get<parser::OmpReductionOperator>(x.v.t)};
auto createDummyProcSymbol = [&](const parser::Name *name) {
// If name resolution failed, create a dummy symbol
const auto namePair{
currScope().try_emplace(name->source, Attrs{}, ProcEntityDetails{})};
auto &newSymbol{*namePair.first->second};
if (context_.intrinsics().IsIntrinsic(name->ToString())) {
newSymbol.attrs().set(Attr::INTRINSIC);
}
name->symbol = &newSymbol;
};
if (const auto *procD{parser::Unwrap<parser::ProcedureDesignator>(opr.u)}) {
if (const auto *name{parser::Unwrap<parser::Name>(procD->u)}) {
if (!name->symbol) {
if (!ResolveName(name)) {
createDummyProcSymbol(name);
}
}
}
if (const auto *procRef{
parser::Unwrap<parser::ProcComponentRef>(procD->u)}) {
if (!procRef->v.thing.component.symbol) {
if (!ResolveName(&procRef->v.thing.component)) {
createDummyProcSymbol(&procRef->v.thing.component);
}
}
}
}
const auto &objList{std::get<parser::OmpObjectList>(x.v.t)};
ResolveOmpObjectList(objList, Symbol::Flag::OmpReduction);
return false;
}
bool Pre(const parser::OmpAlignedClause &x) {
const auto &alignedNameList{std::get<parser::OmpObjectList>(x.t)};
ResolveOmpObjectList(alignedNameList, Symbol::Flag::OmpAligned);
return false;
}
bool Pre(const parser::OmpClause::Nontemporal &x) {
const auto &nontemporalNameList{x.v};
ResolveOmpNameList(nontemporalNameList, Symbol::Flag::OmpNontemporal);
return false;
}
bool Pre(const parser::OmpDependClause &x) {
if (const auto *dependSink{
std::get_if<parser::OmpDependClause::Sink>(&x.u)}) {
const auto &dependSinkVec{dependSink->v};
for (const auto &dependSinkElement : dependSinkVec) {
const auto &name{std::get<parser::Name>(dependSinkElement.t)};
ResolveName(&name);
}
}
return false;
}
bool Pre(const parser::OmpClause::UseDevicePtr &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpUseDevicePtr);
return false;
}
bool Pre(const parser::OmpClause::UseDeviceAddr &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpUseDeviceAddr);
return false;
}
bool Pre(const parser::OmpClause::IsDevicePtr &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpIsDevicePtr);
return false;
}
bool Pre(const parser::OmpClause::HasDeviceAddr &x) {
ResolveOmpObjectList(x.v, Symbol::Flag::OmpHasDeviceAddr);
return false;
}
void Post(const parser::Name &);
// Keep track of labels in the statements that causes jumps to target labels
void Post(const parser::GotoStmt &gotoStmt) { CheckSourceLabel(gotoStmt.v); }
void Post(const parser::ComputedGotoStmt &computedGotoStmt) {
for (auto &label : std::get<std::list<parser::Label>>(computedGotoStmt.t)) {
CheckSourceLabel(label);
}
}
void Post(const parser::ArithmeticIfStmt &arithmeticIfStmt) {
CheckSourceLabel(std::get<1>(arithmeticIfStmt.t));
CheckSourceLabel(std::get<2>(arithmeticIfStmt.t));
CheckSourceLabel(std::get<3>(arithmeticIfStmt.t));
}
void Post(const parser::AssignedGotoStmt &assignedGotoStmt) {
for (auto &label : std::get<std::list<parser::Label>>(assignedGotoStmt.t)) {
CheckSourceLabel(label);
}
}
void Post(const parser::AltReturnSpec &altReturnSpec) {
CheckSourceLabel(altReturnSpec.v);
}
void Post(const parser::ErrLabel &errLabel) { CheckSourceLabel(errLabel.v); }
void Post(const parser::EndLabel &endLabel) { CheckSourceLabel(endLabel.v); }
void Post(const parser::EorLabel &eorLabel) { CheckSourceLabel(eorLabel.v); }
void Post(const parser::OmpMapClause &x) {
Symbol::Flag ompFlag = Symbol::Flag::OmpMapToFrom;
if (const auto &maptype{std::get<std::optional<parser::OmpMapType>>(x.t)}) {
using Type = parser::OmpMapType::Type;
const Type &type{std::get<Type>(maptype->t)};
switch (type) {
case Type::To:
ompFlag = Symbol::Flag::OmpMapTo;
break;
case Type::From:
ompFlag = Symbol::Flag::OmpMapFrom;
break;
case Type::Tofrom:
ompFlag = Symbol::Flag::OmpMapToFrom;
break;
case Type::Alloc:
ompFlag = Symbol::Flag::OmpMapAlloc;
break;
case Type::Release:
ompFlag = Symbol::Flag::OmpMapRelease;
break;
case Type::Delete:
ompFlag = Symbol::Flag::OmpMapDelete;
break;
}
}
const auto &ompObjList{std::get<parser::OmpObjectList>(x.t)};
for (const auto &ompObj : ompObjList.v) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
if (const auto *name{
semantics::getDesignatorNameIfDataRef(designator)}) {
if (name->symbol) {
name->symbol->set(ompFlag);
AddToContextObjectWithDSA(*name->symbol, ompFlag);
}
if (name->symbol &&
semantics::IsAssumedSizeArray(*name->symbol)) {
context_.Say(designator.source,
"Assumed-size whole arrays may not appear on the %s "
"clause"_err_en_US,
"MAP");
}
}
},
[&](const auto &name) {},
},
ompObj.u);
ResolveOmpObject(ompObj, ompFlag);
}
}
const parser::OmpClause *associatedClause{nullptr};
void SetAssociatedClause(const parser::OmpClause &c) {
associatedClause = &c;
}
const parser::OmpClause *GetAssociatedClause() { return associatedClause; }
private:
std::int64_t GetAssociatedLoopLevelFromClauses(const parser::OmpClauseList &);
Symbol::Flags dataSharingAttributeFlags{Symbol::Flag::OmpShared,
Symbol::Flag::OmpPrivate, Symbol::Flag::OmpFirstPrivate,
Symbol::Flag::OmpLastPrivate, Symbol::Flag::OmpReduction,
Symbol::Flag::OmpLinear};
Symbol::Flags privateDataSharingAttributeFlags{Symbol::Flag::OmpPrivate,
Symbol::Flag::OmpFirstPrivate, Symbol::Flag::OmpLastPrivate};
Symbol::Flags ompFlagsRequireNewSymbol{Symbol::Flag::OmpPrivate,
Symbol::Flag::OmpLinear, Symbol::Flag::OmpFirstPrivate,
Symbol::Flag::OmpLastPrivate, Symbol::Flag::OmpReduction,
Symbol::Flag::OmpCriticalLock, Symbol::Flag::OmpCopyIn,
Symbol::Flag::OmpUseDevicePtr, Symbol::Flag::OmpUseDeviceAddr,
Symbol::Flag::OmpIsDevicePtr, Symbol::Flag::OmpHasDeviceAddr};
Symbol::Flags ompFlagsRequireMark{
Symbol::Flag::OmpThreadprivate, Symbol::Flag::OmpDeclareTarget};
Symbol::Flags dataCopyingAttributeFlags{
Symbol::Flag::OmpCopyIn, Symbol::Flag::OmpCopyPrivate};
std::vector<const parser::Name *> allocateNames_; // on one directive
UnorderedSymbolSet privateDataSharingAttributeObjects_; // on one directive
UnorderedSymbolSet stmtFunctionExprSymbols_;
std::multimap<const parser::Label,
std::pair<parser::CharBlock, std::optional<DirContext>>>
sourceLabels_;
std::map<const parser::Label,
std::pair<parser::CharBlock, std::optional<DirContext>>>
targetLabels_;
parser::CharBlock currentStatementSource_;
void AddAllocateName(const parser::Name *&object) {
allocateNames_.push_back(object);
}
void ClearAllocateNames() { allocateNames_.clear(); }
void AddPrivateDataSharingAttributeObjects(SymbolRef object) {
privateDataSharingAttributeObjects_.insert(object);
}
void ClearPrivateDataSharingAttributeObjects() {
privateDataSharingAttributeObjects_.clear();
}
// Predetermined DSA rules
void PrivatizeAssociatedLoopIndexAndCheckLoopLevel(
const parser::OpenMPLoopConstruct &);
void ResolveSeqLoopIndexInParallelOrTaskConstruct(const parser::Name &);
bool IsNestedInDirective(llvm::omp::Directive directive);
void ResolveOmpObjectList(const parser::OmpObjectList &, Symbol::Flag);
void ResolveOmpObject(const parser::OmpObject &, Symbol::Flag);
Symbol *ResolveOmp(const parser::Name &, Symbol::Flag, Scope &);
Symbol *ResolveOmp(Symbol &, Symbol::Flag, Scope &);
Symbol *ResolveOmpCommonBlockName(const parser::Name *);
void ResolveOmpNameList(const std::list<parser::Name> &, Symbol::Flag);
void ResolveOmpName(const parser::Name &, Symbol::Flag);
Symbol *ResolveName(const parser::Name *);
Symbol *ResolveOmpObjectScope(const parser::Name *);
Symbol *DeclareOrMarkOtherAccessEntity(const parser::Name &, Symbol::Flag);
Symbol *DeclareOrMarkOtherAccessEntity(Symbol &, Symbol::Flag);
void CheckMultipleAppearances(
const parser::Name &, const Symbol &, Symbol::Flag);
void CheckDataCopyingClause(
const parser::Name &, const Symbol &, Symbol::Flag);
void CheckAssocLoopLevel(std::int64_t level, const parser::OmpClause *clause);
void CheckObjectInNamelist(
const parser::Name &, const Symbol &, Symbol::Flag);
void CheckSourceLabel(const parser::Label &);
void CheckLabelContext(const parser::CharBlock, const parser::CharBlock,
std::optional<DirContext>, std::optional<DirContext>);
void ClearLabels() {
sourceLabels_.clear();
targetLabels_.clear();
};
void CheckAllNamesInAllocateStmt(const parser::CharBlock &source,
const parser::OmpObjectList &ompObjectList,
const parser::AllocateStmt &allocate);
void CheckNameInAllocateStmt(const parser::CharBlock &source,
const parser::Name &ompObject, const parser::AllocateStmt &allocate);
std::int64_t ordCollapseLevel{0};
void AddOmpRequiresToScope(Scope &, WithOmpDeclarative::RequiresFlags,
std::optional<common::OmpAtomicDefaultMemOrderType>);
void IssueNonConformanceWarning(
llvm::omp::Directive D, parser::CharBlock source);
void CreateImplicitSymbols(
const Symbol *symbol, std::optional<Symbol::Flag> setFlag = std::nullopt);
};
template <typename T>
bool DirectiveAttributeVisitor<T>::HasDataSharingAttributeObject(
const Symbol &object) {
auto it{dataSharingAttributeObjects_.find(object)};
return it != dataSharingAttributeObjects_.end();
}
template <typename T>
const parser::Name *DirectiveAttributeVisitor<T>::GetLoopIndex(
const parser::DoConstruct &x) {
using Bounds = parser::LoopControl::Bounds;
if (x.GetLoopControl()) {
if (const Bounds * b{std::get_if<Bounds>(&x.GetLoopControl()->u)}) {
return &b->name.thing;
} else {
return nullptr;
}
} else {
context_
.Say(std::get<parser::Statement<parser::NonLabelDoStmt>>(x.t).source,
"Loop control is not present in the DO LOOP"_err_en_US)
.Attach(GetContext().directiveSource,
"associated with the enclosing LOOP construct"_en_US);
return nullptr;
}
}
template <typename T>
const parser::DoConstruct *DirectiveAttributeVisitor<T>::GetDoConstructIf(
const parser::ExecutionPartConstruct &x) {
return parser::Unwrap<parser::DoConstruct>(x);
}
template <typename T>
Symbol *DirectiveAttributeVisitor<T>::DeclareNewPrivateAccessEntity(
const Symbol &object, Symbol::Flag flag, Scope &scope) {
assert(object.owner() != currScope());
auto &symbol{MakeAssocSymbol(object.name(), object, scope)};
symbol.set(flag);
if (flag == Symbol::Flag::OmpCopyIn) {
// The symbol in copyin clause must be threadprivate entity.
symbol.set(Symbol::Flag::OmpThreadprivate);
}
return &symbol;
}
template <typename T>
Symbol *DirectiveAttributeVisitor<T>::DeclarePrivateAccessEntity(
const parser::Name &name, Symbol::Flag flag, Scope &scope) {
if (!name.symbol) {
return nullptr; // not resolved by Name Resolution step, do nothing
}
name.symbol = DeclarePrivateAccessEntity(*name.symbol, flag, scope);
return name.symbol;
}
template <typename T>
Symbol *DirectiveAttributeVisitor<T>::DeclarePrivateAccessEntity(
Symbol &object, Symbol::Flag flag, Scope &scope) {
if (object.owner() != currScope()) {
return DeclareNewPrivateAccessEntity(object, flag, scope);
} else {
object.set(flag);
return &object;
}
}
bool AccAttributeVisitor::Pre(const parser::OpenACCBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::AccBeginBlockDirective>(x.t)};
const auto &blockDir{std::get<parser::AccBlockDirective>(beginBlockDir.t)};
switch (blockDir.v) {
case llvm::acc::Directive::ACCD_data:
case llvm::acc::Directive::ACCD_host_data:
case llvm::acc::Directive::ACCD_kernels:
case llvm::acc::Directive::ACCD_parallel:
case llvm::acc::Directive::ACCD_serial:
PushContext(blockDir.source, blockDir.v);
break;
default:
break;
}
ClearDataSharingAttributeObjects();
return true;
}
bool AccAttributeVisitor::Pre(const parser::OpenACCDeclarativeConstruct &x) {
if (const auto *declConstruct{
std::get_if<parser::OpenACCStandaloneDeclarativeConstruct>(&x.u)}) {
const auto &declDir{
std::get<parser::AccDeclarativeDirective>(declConstruct->t)};
PushContext(declDir.source, llvm::acc::Directive::ACCD_declare);
}
ClearDataSharingAttributeObjects();
return true;
}
static const parser::AccObjectList &GetAccObjectList(
const parser::AccClause &clause) {
if (const auto *copyClause =
std::get_if<Fortran::parser::AccClause::Copy>(&clause.u)) {
return copyClause->v;
} else if (const auto *createClause =
std::get_if<Fortran::parser::AccClause::Create>(&clause.u)) {
const Fortran::parser::AccObjectListWithModifier &listWithModifier =
createClause->v;
const Fortran::parser::AccObjectList &accObjectList =
std::get<Fortran::parser::AccObjectList>(listWithModifier.t);
return accObjectList;
} else if (const auto *copyinClause =
std::get_if<Fortran::parser::AccClause::Copyin>(&clause.u)) {
const Fortran::parser::AccObjectListWithModifier &listWithModifier =
copyinClause->v;
const Fortran::parser::AccObjectList &accObjectList =
std::get<Fortran::parser::AccObjectList>(listWithModifier.t);
return accObjectList;
} else if (const auto *copyoutClause =
std::get_if<Fortran::parser::AccClause::Copyout>(&clause.u)) {
const Fortran::parser::AccObjectListWithModifier &listWithModifier =
copyoutClause->v;
const Fortran::parser::AccObjectList &accObjectList =
std::get<Fortran::parser::AccObjectList>(listWithModifier.t);
return accObjectList;
} else if (const auto *presentClause =
std::get_if<Fortran::parser::AccClause::Present>(&clause.u)) {
return presentClause->v;
} else if (const auto *deviceptrClause =
std::get_if<Fortran::parser::AccClause::Deviceptr>(
&clause.u)) {
return deviceptrClause->v;
} else if (const auto *deviceResidentClause =
std::get_if<Fortran::parser::AccClause::DeviceResident>(
&clause.u)) {
return deviceResidentClause->v;
} else if (const auto *linkClause =
std::get_if<Fortran::parser::AccClause::Link>(&clause.u)) {
return linkClause->v;
} else {
llvm_unreachable("Clause without object list!");
}
}
void AccAttributeVisitor::Post(
const parser::OpenACCStandaloneDeclarativeConstruct &x) {
const auto &clauseList = std::get<parser::AccClauseList>(x.t);
for (const auto &clause : clauseList.v) {
// Restriction - line 2414
DoNotAllowAssumedSizedArray(GetAccObjectList(clause));
}
}
bool AccAttributeVisitor::Pre(const parser::OpenACCLoopConstruct &x) {
const auto &beginDir{std::get<parser::AccBeginLoopDirective>(x.t)};
const auto &loopDir{std::get<parser::AccLoopDirective>(beginDir.t)};
const auto &clauseList{std::get<parser::AccClauseList>(beginDir.t)};
if (loopDir.v == llvm::acc::Directive::ACCD_loop) {
PushContext(loopDir.source, loopDir.v);
}
ClearDataSharingAttributeObjects();
SetContextAssociatedLoopLevel(GetAssociatedLoopLevelFromClauses(clauseList));
const auto &outer{std::get<std::optional<parser::DoConstruct>>(x.t)};
CheckAssociatedLoop(*outer);
return true;
}
bool AccAttributeVisitor::Pre(const parser::OpenACCStandaloneConstruct &x) {
const auto &standaloneDir{std::get<parser::AccStandaloneDirective>(x.t)};
switch (standaloneDir.v) {
case llvm::acc::Directive::ACCD_enter_data:
case llvm::acc::Directive::ACCD_exit_data:
case llvm::acc::Directive::ACCD_init:
case llvm::acc::Directive::ACCD_set:
case llvm::acc::Directive::ACCD_shutdown:
case llvm::acc::Directive::ACCD_update:
PushContext(standaloneDir.source, standaloneDir.v);
break;
default:
break;
}
ClearDataSharingAttributeObjects();
return true;
}
Symbol *AccAttributeVisitor::ResolveName(
const parser::Name &name, bool parentScope) {
Symbol *prev{currScope().FindSymbol(name.source)};
// Check in parent scope if asked for.
if (!prev && parentScope) {
prev = currScope().parent().FindSymbol(name.source);
}
if (prev != name.symbol) {
name.symbol = prev;
}
return prev;
}
Symbol *AccAttributeVisitor::ResolveFctName(const parser::Name &name) {
Symbol *prev{currScope().FindSymbol(name.source)};
if (!prev || (prev && prev->IsFuncResult())) {
prev = currScope().parent().FindSymbol(name.source);
if (!prev) {
prev = &context_.globalScope().MakeSymbol(
name.source, Attrs{}, ProcEntityDetails{});
}
}
if (prev != name.symbol) {
name.symbol = prev;
}
return prev;
}
template <typename T>
common::IfNoLvalue<T, T> FoldExpr(
evaluate::FoldingContext &foldingContext, T &&expr) {
return evaluate::Fold(foldingContext, std::move(expr));
}
template <typename T>
MaybeExpr EvaluateExpr(
Fortran::semantics::SemanticsContext &semanticsContext, const T &expr) {
return FoldExpr(
semanticsContext.foldingContext(), AnalyzeExpr(semanticsContext, expr));
}
void AccAttributeVisitor::AddRoutineInfoToSymbol(
Symbol &symbol, const parser::OpenACCRoutineConstruct &x) {
if (symbol.has<SubprogramDetails>()) {
Fortran::semantics::OpenACCRoutineInfo info;
const auto &clauses = std::get<Fortran::parser::AccClauseList>(x.t);
for (const Fortran::parser::AccClause &clause : clauses.v) {
if (std::get_if<Fortran::parser::AccClause::Seq>(&clause.u)) {
if (info.deviceTypeInfos().empty()) {
info.set_isSeq();
} else {
info.deviceTypeInfos().back().set_isSeq();
}
} else if (const auto *gangClause =
std::get_if<Fortran::parser::AccClause::Gang>(&clause.u)) {
if (info.deviceTypeInfos().empty()) {
info.set_isGang();
} else {
info.deviceTypeInfos().back().set_isGang();
}
if (gangClause->v) {
const Fortran::parser::AccGangArgList &x = *gangClause->v;
for (const Fortran::parser::AccGangArg &gangArg : x.v) {
if (const auto *dim =
std::get_if<Fortran::parser::AccGangArg::Dim>(&gangArg.u)) {
if (const auto v{EvaluateInt64(context_, dim->v)}) {
if (info.deviceTypeInfos().empty()) {
info.set_gangDim(*v);
} else {
info.deviceTypeInfos().back().set_gangDim(*v);
}
}
}
}
}
} else if (std::get_if<Fortran::parser::AccClause::Vector>(&clause.u)) {
if (info.deviceTypeInfos().empty()) {
info.set_isVector();
} else {
info.deviceTypeInfos().back().set_isVector();
}
} else if (std::get_if<Fortran::parser::AccClause::Worker>(&clause.u)) {
if (info.deviceTypeInfos().empty()) {
info.set_isWorker();
} else {
info.deviceTypeInfos().back().set_isWorker();
}
} else if (std::get_if<Fortran::parser::AccClause::Nohost>(&clause.u)) {
info.set_isNohost();
} else if (const auto *bindClause =
std::get_if<Fortran::parser::AccClause::Bind>(&clause.u)) {
if (const auto *name =
std::get_if<Fortran::parser::Name>(&bindClause->v.u)) {
if (Symbol *sym = ResolveFctName(*name)) {
if (info.deviceTypeInfos().empty()) {
info.set_bindName(sym->name().ToString());
} else {
info.deviceTypeInfos().back().set_bindName(
sym->name().ToString());
}
} else {
context_.Say((*name).source,
"No function or subroutine declared for '%s'"_err_en_US,
(*name).source);
}
} else if (const auto charExpr =
std::get_if<Fortran::parser::ScalarDefaultCharExpr>(
&bindClause->v.u)) {
auto *charConst =
Fortran::parser::Unwrap<Fortran::parser::CharLiteralConstant>(
*charExpr);
std::string str{std::get<std::string>(charConst->t)};
std::stringstream bindName;
bindName << "\"" << str << "\"";
if (info.deviceTypeInfos().empty()) {
info.set_bindName(bindName.str());
} else {
info.deviceTypeInfos().back().set_bindName(bindName.str());
}
}
} else if (const auto *dType =
std::get_if<Fortran::parser::AccClause::DeviceType>(
&clause.u)) {
const parser::AccDeviceTypeExprList &deviceTypeExprList = dType->v;
OpenACCRoutineDeviceTypeInfo dtypeInfo;
dtypeInfo.set_dType(deviceTypeExprList.v.front().v);
info.add_deviceTypeInfo(dtypeInfo);
}
}
symbol.get<SubprogramDetails>().add_openACCRoutineInfo(info);
}
}
bool AccAttributeVisitor::Pre(const parser::OpenACCRoutineConstruct &x) {
const auto &verbatim{std::get<parser::Verbatim>(x.t)};
if (topScope_) {
PushContext(
verbatim.source, llvm::acc::Directive::ACCD_routine, *topScope_);
} else {
PushContext(verbatim.source, llvm::acc::Directive::ACCD_routine);
}
const auto &optName{std::get<std::optional<parser::Name>>(x.t)};
if (optName) {
if (Symbol *sym = ResolveFctName(*optName)) {
Symbol &ultimate{sym->GetUltimate()};
AddRoutineInfoToSymbol(ultimate, x);
} else {
context_.Say((*optName).source,
"No function or subroutine declared for '%s'"_err_en_US,
(*optName).source);
}
} else {
if (currScope().symbol()) {
AddRoutineInfoToSymbol(*currScope().symbol(), x);
}
}
return true;
}
bool AccAttributeVisitor::Pre(const parser::AccBindClause &x) {
if (const auto *name{std::get_if<parser::Name>(&x.u)}) {
if (!ResolveFctName(*name)) {
context_.Say(name->source,
"No function or subroutine declared for '%s'"_err_en_US,
name->source);
}
}
return true;
}
bool AccAttributeVisitor::Pre(const parser::OpenACCCombinedConstruct &x) {
const auto &beginBlockDir{std::get<parser::AccBeginCombinedDirective>(x.t)};
const auto &combinedDir{
std::get<parser::AccCombinedDirective>(beginBlockDir.t)};
switch (combinedDir.v) {
case llvm::acc::Directive::ACCD_kernels_loop:
case llvm::acc::Directive::ACCD_parallel_loop:
case llvm::acc::Directive::ACCD_serial_loop:
PushContext(combinedDir.source, combinedDir.v);
break;
default:
break;
}
const auto &clauseList{std::get<parser::AccClauseList>(beginBlockDir.t)};
SetContextAssociatedLoopLevel(GetAssociatedLoopLevelFromClauses(clauseList));
const auto &outer{std::get<std::optional<parser::DoConstruct>>(x.t)};
CheckAssociatedLoop(*outer);
ClearDataSharingAttributeObjects();
return true;
}
static bool IsLastNameArray(const parser::Designator &designator) {
const auto &name{GetLastName(designator)};
const evaluate::DataRef dataRef{*(name.symbol)};
return common::visit(
common::visitors{
[](const evaluate::SymbolRef &ref) {
return ref->Rank() > 0 ||
ref->GetType()->category() == DeclTypeSpec::Numeric;
},
[](const evaluate::ArrayRef &aref) {
return aref.base().IsSymbol() ||
aref.base().GetComponent().base().Rank() == 0;
},
[](const auto &) { return false; },
},
dataRef.u);
}
void AccAttributeVisitor::AllowOnlyArrayAndSubArray(
const parser::AccObjectList &objectList) {
for (const auto &accObject : objectList.v) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
if (!IsLastNameArray(designator)) {
context_.Say(designator.source,
"Only array element or subarray are allowed in %s directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCDirectiveName(
GetContext().directive)
.str()));
}
},
[&](const auto &name) {
context_.Say(name.source,
"Only array element or subarray are allowed in %s directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCDirectiveName(GetContext().directive)
.str()));
},
},
accObject.u);
}
}
void AccAttributeVisitor::DoNotAllowAssumedSizedArray(
const parser::AccObjectList &objectList) {
for (const auto &accObject : objectList.v) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
const auto &name{GetLastName(designator)};
if (name.symbol && semantics::IsAssumedSizeArray(*name.symbol)) {
context_.Say(designator.source,
"Assumed-size dummy arrays may not appear on the %s "
"directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCDirectiveName(
GetContext().directive)
.str()));
}
},
[&](const auto &name) {
},
},
accObject.u);
}
}
void AccAttributeVisitor::AllowOnlyVariable(const parser::AccObject &object) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
const auto &name{GetLastName(designator)};
if (name.symbol && !semantics::IsVariableName(*name.symbol) &&
!semantics::IsNamedConstant(*name.symbol)) {
context_.Say(designator.source,
"Only variables are allowed in data clauses on the %s "
"directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCDirectiveName(GetContext().directive)
.str()));
}
},
[&](const auto &name) {},
},
object.u);
}
bool AccAttributeVisitor::Pre(const parser::OpenACCCacheConstruct &x) {
const auto &verbatim{std::get<parser::Verbatim>(x.t)};
PushContext(verbatim.source, llvm::acc::Directive::ACCD_cache);
ClearDataSharingAttributeObjects();
const auto &objectListWithModifier =
std::get<parser::AccObjectListWithModifier>(x.t);
const auto &objectList =
std::get<Fortran::parser::AccObjectList>(objectListWithModifier.t);
// 2.10 Cache directive restriction: A var in a cache directive must be a
// single array element or a simple subarray.
AllowOnlyArrayAndSubArray(objectList);
return true;
}
std::int64_t AccAttributeVisitor::GetAssociatedLoopLevelFromClauses(
const parser::AccClauseList &x) {
std::int64_t collapseLevel{0};
for (const auto &clause : x.v) {
if (const auto *collapseClause{
std::get_if<parser::AccClause::Collapse>(&clause.u)}) {
const parser::AccCollapseArg &arg = collapseClause->v;
const auto &collapseValue{std::get<parser::ScalarIntConstantExpr>(arg.t)};
if (const auto v{EvaluateInt64(context_, collapseValue)}) {
collapseLevel = *v;
}
}
}
if (collapseLevel) {
return collapseLevel;
}
return 1; // default is outermost loop
}
void AccAttributeVisitor::CheckAssociatedLoop(
const parser::DoConstruct &outerDoConstruct) {
std::int64_t level{GetContext().associatedLoopLevel};
if (level <= 0) { // collapse value was negative or 0
return;
}
const auto getNextDoConstruct =
[this](const parser::Block &block,
std::int64_t &level) -> const parser::DoConstruct * {
for (const auto &entry : block) {
if (const auto *doConstruct = GetDoConstructIf(entry)) {
return doConstruct;
} else if (parser::Unwrap<parser::CompilerDirective>(entry)) {
// It is allowed to have a compiler directive associated with the loop.
continue;
} else if (const auto &accLoop{
parser::Unwrap<parser::OpenACCLoopConstruct>(entry)}) {
if (level == 0)
break;
const auto &beginDir{
std::get<parser::AccBeginLoopDirective>(accLoop->t)};
context_.Say(beginDir.source,
"LOOP directive not expected in COLLAPSE loop nest"_err_en_US);
level = 0;
} else {
break;
}
}
return nullptr;
};
auto checkExprHasSymbols = [&](llvm::SmallVector<Symbol *> &ivs,
semantics::UnorderedSymbolSet &symbols) {
for (auto iv : ivs) {
if (symbols.count(*iv) != 0) {
context_.Say(GetContext().directiveSource,
"Trip count must be computable and invariant"_err_en_US);
}
}
};
Symbol::Flag flag = Symbol::Flag::AccPrivate;
llvm::SmallVector<Symbol *> ivs;
using Bounds = parser::LoopControl::Bounds;
for (const parser::DoConstruct *loop{&outerDoConstruct}; loop && level > 0;) {
// Go through all nested loops to ensure index variable exists.
if (const parser::Name * ivName{GetLoopIndex(*loop)}) {
if (auto *symbol{ResolveAcc(*ivName, flag, currScope())}) {
if (auto &control{loop->GetLoopControl()}) {
if (const Bounds * b{std::get_if<Bounds>(&control->u)}) {
if (auto lowerExpr{semantics::AnalyzeExpr(context_, b->lower)}) {
semantics::UnorderedSymbolSet lowerSyms =
evaluate::CollectSymbols(*lowerExpr);
checkExprHasSymbols(ivs, lowerSyms);
}
if (auto upperExpr{semantics::AnalyzeExpr(context_, b->upper)}) {
semantics::UnorderedSymbolSet upperSyms =
evaluate::CollectSymbols(*upperExpr);
checkExprHasSymbols(ivs, upperSyms);
}
}
}
ivs.push_back(symbol);
}
}
const auto &block{std::get<parser::Block>(loop->t)};
--level;
loop = getNextDoConstruct(block, level);
}
CHECK(level == 0);
}
void AccAttributeVisitor::EnsureAllocatableOrPointer(
const llvm::acc::Clause clause, const parser::AccObjectList &objectList) {
for (const auto &accObject : objectList.v) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
const auto &lastName{GetLastName(designator)};
if (!IsAllocatableOrObjectPointer(lastName.symbol)) {
context_.Say(designator.source,
"Argument `%s` on the %s clause must be a variable or "
"array with the POINTER or ALLOCATABLE attribute"_err_en_US,
lastName.symbol->name(),
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCClauseName(clause).str()));
}
},
[&](const auto &name) {
context_.Say(name.source,
"Argument on the %s clause must be a variable or "
"array with the POINTER or ALLOCATABLE attribute"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCClauseName(clause).str()));
},
},
accObject.u);
}
}
bool AccAttributeVisitor::Pre(const parser::AccClause::Attach &x) {
// Restriction - line 1708-1709
EnsureAllocatableOrPointer(llvm::acc::Clause::ACCC_attach, x.v);
return true;
}
bool AccAttributeVisitor::Pre(const parser::AccClause::Detach &x) {
// Restriction - line 1715-1717
EnsureAllocatableOrPointer(llvm::acc::Clause::ACCC_detach, x.v);
return true;
}
void AccAttributeVisitor::Post(const parser::AccDefaultClause &x) {
if (!dirContext_.empty()) {
switch (x.v) {
case llvm::acc::DefaultValue::ACC_Default_present:
SetContextDefaultDSA(Symbol::Flag::AccPresent);
break;
case llvm::acc::DefaultValue::ACC_Default_none:
SetContextDefaultDSA(Symbol::Flag::AccNone);
break;
}
}
}
// For OpenACC constructs, check all the data-refs within the constructs
// and adjust the symbol for each Name if necessary
void AccAttributeVisitor::Post(const parser::Name &name) {
auto *symbol{name.symbol};
if (symbol && !dirContext_.empty() && GetContext().withinConstruct) {
if (!symbol->owner().IsDerivedType() && !symbol->has<ProcEntityDetails>() &&
!symbol->has<SubprogramDetails>() && !IsObjectWithDSA(*symbol)) {
if (Symbol * found{currScope().FindSymbol(name.source)}) {
if (symbol != found) {
name.symbol = found; // adjust the symbol within region
} else if (GetContext().defaultDSA == Symbol::Flag::AccNone) {
// 2.5.14.
context_.Say(name.source,
"The DEFAULT(NONE) clause requires that '%s' must be listed in "
"a data-mapping clause"_err_en_US,
symbol->name());
}
}
}
} // within OpenACC construct
}
Symbol *AccAttributeVisitor::ResolveAccCommonBlockName(
const parser::Name *name) {
if (auto *prev{name
? GetContext().scope.parent().FindCommonBlock(name->source)
: nullptr}) {
name->symbol = prev;
return prev;
}
// Check if the Common Block is declared in the current scope
if (auto *commonBlockSymbol{
name ? GetContext().scope.FindCommonBlock(name->source) : nullptr}) {
name->symbol = commonBlockSymbol;
return commonBlockSymbol;
}
return nullptr;
}
void AccAttributeVisitor::ResolveAccObjectList(
const parser::AccObjectList &accObjectList, Symbol::Flag accFlag) {
for (const auto &accObject : accObjectList.v) {
AllowOnlyVariable(accObject);
ResolveAccObject(accObject, accFlag);
}
}
void AccAttributeVisitor::ResolveAccObject(
const parser::AccObject &accObject, Symbol::Flag accFlag) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
if (const auto *name{
semantics::getDesignatorNameIfDataRef(designator)}) {
if (auto *symbol{ResolveAcc(*name, accFlag, currScope())}) {
AddToContextObjectWithDSA(*symbol, accFlag);
if (dataSharingAttributeFlags.test(accFlag)) {
CheckMultipleAppearances(*name, *symbol, accFlag);
}
}
} else {
// Array sections to be changed to substrings as needed
if (AnalyzeExpr(context_, designator)) {
if (std::holds_alternative<parser::Substring>(designator.u)) {
context_.Say(designator.source,
"Substrings are not allowed on OpenACC "
"directives or clauses"_err_en_US);
}
}
// other checks, more TBD
}
},
[&](const parser::Name &name) { // common block
if (auto *symbol{ResolveAccCommonBlockName(&name)}) {
CheckMultipleAppearances(
name, *symbol, Symbol::Flag::AccCommonBlock);
for (auto &object : symbol->get<CommonBlockDetails>().objects()) {
if (auto *resolvedObject{
ResolveAcc(*object, accFlag, currScope())}) {
AddToContextObjectWithDSA(*resolvedObject, accFlag);
}
}
} else {
context_.Say(name.source,
"COMMON block must be declared in the same scoping unit "
"in which the OpenACC directive or clause appears"_err_en_US);
}
},
},
accObject.u);
}
Symbol *AccAttributeVisitor::ResolveAcc(
const parser::Name &name, Symbol::Flag accFlag, Scope &scope) {
return DeclareOrMarkOtherAccessEntity(name, accFlag);
}
Symbol *AccAttributeVisitor::ResolveAcc(
Symbol &symbol, Symbol::Flag accFlag, Scope &scope) {
return DeclareOrMarkOtherAccessEntity(symbol, accFlag);
}
Symbol *AccAttributeVisitor::DeclareOrMarkOtherAccessEntity(
const parser::Name &name, Symbol::Flag accFlag) {
Symbol *prev{currScope().FindSymbol(name.source)};
if (!name.symbol || !prev) {
return nullptr;
} else if (prev != name.symbol) {
name.symbol = prev;
}
return DeclareOrMarkOtherAccessEntity(*prev, accFlag);
}
Symbol *AccAttributeVisitor::DeclareOrMarkOtherAccessEntity(
Symbol &object, Symbol::Flag accFlag) {
if (accFlagsRequireMark.test(accFlag)) {
if (GetContext().directive == llvm::acc::ACCD_declare) {
object.set(Symbol::Flag::AccDeclare);
object.set(accFlag);
}
}
return &object;
}
static bool WithMultipleAppearancesAccException(
const Symbol &symbol, Symbol::Flag flag) {
return false; // Place holder
}
void AccAttributeVisitor::CheckMultipleAppearances(
const parser::Name &name, const Symbol &symbol, Symbol::Flag accFlag) {
const auto *target{&symbol};
if (HasDataSharingAttributeObject(*target) &&
!WithMultipleAppearancesAccException(symbol, accFlag)) {
context_.Say(name.source,
"'%s' appears in more than one data-sharing clause "
"on the same OpenACC directive"_err_en_US,
name.ToString());
} else {
AddDataSharingAttributeObject(*target);
}
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::OmpBeginBlockDirective>(x.t)};
const auto &beginDir{std::get<parser::OmpBlockDirective>(beginBlockDir.t)};
switch (beginDir.v) {
case llvm::omp::Directive::OMPD_masked:
case llvm::omp::Directive::OMPD_parallel_masked:
case llvm::omp::Directive::OMPD_master:
case llvm::omp::Directive::OMPD_ordered:
case llvm::omp::Directive::OMPD_parallel:
case llvm::omp::Directive::OMPD_single:
case llvm::omp::Directive::OMPD_target:
case llvm::omp::Directive::OMPD_target_data:
case llvm::omp::Directive::OMPD_task:
case llvm::omp::Directive::OMPD_taskgroup:
case llvm::omp::Directive::OMPD_teams:
case llvm::omp::Directive::OMPD_workshare:
case llvm::omp::Directive::OMPD_parallel_workshare:
case llvm::omp::Directive::OMPD_target_teams:
case llvm::omp::Directive::OMPD_target_parallel:
PushContext(beginDir.source, beginDir.v);
break;
default:
// TODO others
break;
}
if (beginDir.v == llvm::omp::Directive::OMPD_master)
IssueNonConformanceWarning(beginDir.v, beginDir.source);
ClearDataSharingAttributeObjects();
ClearPrivateDataSharingAttributeObjects();
ClearAllocateNames();
return true;
}
void OmpAttributeVisitor::Post(const parser::OpenMPBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::OmpBeginBlockDirective>(x.t)};
const auto &beginDir{std::get<parser::OmpBlockDirective>(beginBlockDir.t)};
switch (beginDir.v) {
case llvm::omp::Directive::OMPD_masked:
case llvm::omp::Directive::OMPD_parallel_masked:
case llvm::omp::Directive::OMPD_parallel:
case llvm::omp::Directive::OMPD_single:
case llvm::omp::Directive::OMPD_target:
case llvm::omp::Directive::OMPD_task:
case llvm::omp::Directive::OMPD_teams:
case llvm::omp::Directive::OMPD_parallel_workshare:
case llvm::omp::Directive::OMPD_target_teams:
case llvm::omp::Directive::OMPD_target_parallel: {
bool hasPrivate;
for (const auto *allocName : allocateNames_) {
hasPrivate = false;
for (auto privateObj : privateDataSharingAttributeObjects_) {
const Symbol &symbolPrivate{*privateObj};
if (allocName->source == symbolPrivate.name()) {
hasPrivate = true;
break;
}
}
if (!hasPrivate) {
context_.Say(allocName->source,
"The ALLOCATE clause requires that '%s' must be listed in a "
"private "
"data-sharing attribute clause on the same directive"_err_en_US,
allocName->ToString());
}
}
break;
}
default:
break;
}
PopContext();
}
bool OmpAttributeVisitor::Pre(
const parser::OpenMPSimpleStandaloneConstruct &x) {
const auto &standaloneDir{
std::get<parser::OmpSimpleStandaloneDirective>(x.t)};
switch (standaloneDir.v) {
case llvm::omp::Directive::OMPD_barrier:
case llvm::omp::Directive::OMPD_ordered:
case llvm::omp::Directive::OMPD_target_enter_data:
case llvm::omp::Directive::OMPD_target_exit_data:
case llvm::omp::Directive::OMPD_target_update:
case llvm::omp::Directive::OMPD_taskwait:
case llvm::omp::Directive::OMPD_taskyield:
PushContext(standaloneDir.source, standaloneDir.v);
break;
default:
break;
}
ClearDataSharingAttributeObjects();
return true;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPLoopConstruct &x) {
const auto &beginLoopDir{std::get<parser::OmpBeginLoopDirective>(x.t)};
const auto &beginDir{std::get<parser::OmpLoopDirective>(beginLoopDir.t)};
const auto &clauseList{std::get<parser::OmpClauseList>(beginLoopDir.t)};
switch (beginDir.v) {
case llvm::omp::Directive::OMPD_distribute:
case llvm::omp::Directive::OMPD_distribute_parallel_do:
case llvm::omp::Directive::OMPD_distribute_parallel_do_simd:
case llvm::omp::Directive::OMPD_distribute_simd:
case llvm::omp::Directive::OMPD_do:
case llvm::omp::Directive::OMPD_do_simd:
case llvm::omp::Directive::OMPD_loop:
case llvm::omp::Directive::OMPD_masked_taskloop_simd:
case llvm::omp::Directive::OMPD_masked_taskloop:
case llvm::omp::Directive::OMPD_parallel_do:
case llvm::omp::Directive::OMPD_parallel_do_simd:
case llvm::omp::Directive::OMPD_parallel_masked_taskloop_simd:
case llvm::omp::Directive::OMPD_parallel_masked_taskloop:
case llvm::omp::Directive::OMPD_simd:
case llvm::omp::Directive::OMPD_target_loop:
case llvm::omp::Directive::OMPD_target_parallel_do:
case llvm::omp::Directive::OMPD_target_parallel_do_simd:
case llvm::omp::Directive::OMPD_target_parallel_loop:
case llvm::omp::Directive::OMPD_target_teams_distribute:
case llvm::omp::Directive::OMPD_target_teams_distribute_parallel_do:
case llvm::omp::Directive::OMPD_target_teams_distribute_parallel_do_simd:
case llvm::omp::Directive::OMPD_target_teams_distribute_simd:
case llvm::omp::Directive::OMPD_target_teams_loop:
case llvm::omp::Directive::OMPD_target_simd:
case llvm::omp::Directive::OMPD_taskloop:
case llvm::omp::Directive::OMPD_taskloop_simd:
case llvm::omp::Directive::OMPD_teams_distribute:
case llvm::omp::Directive::OMPD_teams_distribute_parallel_do:
case llvm::omp::Directive::OMPD_teams_distribute_parallel_do_simd:
case llvm::omp::Directive::OMPD_teams_distribute_simd:
case llvm::omp::Directive::OMPD_tile:
case llvm::omp::Directive::OMPD_unroll:
PushContext(beginDir.source, beginDir.v);
break;
default:
break;
}
if (beginDir.v == llvm::omp::Directive::OMPD_target_loop)
IssueNonConformanceWarning(beginDir.v, beginDir.source);
ClearDataSharingAttributeObjects();
SetContextAssociatedLoopLevel(GetAssociatedLoopLevelFromClauses(clauseList));
if (beginDir.v == llvm::omp::Directive::OMPD_do) {
if (const auto &doConstruct{
std::get<std::optional<parser::DoConstruct>>(x.t)}) {
if (doConstruct.value().IsDoWhile()) {
return true;
}
}
}
PrivatizeAssociatedLoopIndexAndCheckLoopLevel(x);
ordCollapseLevel = GetAssociatedLoopLevelFromClauses(clauseList) + 1;
return true;
}
void OmpAttributeVisitor::ResolveSeqLoopIndexInParallelOrTaskConstruct(
const parser::Name &iv) {
// Find the parallel or task generating construct enclosing the
// sequential loop.
auto targetIt{dirContext_.rbegin()};
for (;; ++targetIt) {
if (targetIt == dirContext_.rend()) {
return;
}
if (llvm::omp::allParallelSet.test(targetIt->directive) ||
llvm::omp::taskGeneratingSet.test(targetIt->directive)) {
break;
}
}
// If this symbol already has a data-sharing attribute then there is nothing
// to do here.
if (const Symbol * symbol{iv.symbol}) {
for (auto symMap : targetIt->objectWithDSA) {
if (symMap.first->name() == symbol->name()) {
return;
}
}
}
// If this symbol is already Private or Firstprivate in the enclosing
// OpenMP parallel or task then there is nothing to do here.
if (auto *symbol{targetIt->scope.FindSymbol(iv.source)}) {
if (symbol->owner() == targetIt->scope) {
if (symbol->test(Symbol::Flag::OmpPrivate) ||
symbol->test(Symbol::Flag::OmpFirstPrivate)) {
return;
}
}
}
// Otherwise find the symbol and make it Private for the entire enclosing
// parallel or task
if (auto *symbol{ResolveOmp(iv, Symbol::Flag::OmpPrivate, targetIt->scope)}) {
targetIt++;
symbol->set(Symbol::Flag::OmpPreDetermined);
iv.symbol = symbol; // adjust the symbol within region
for (auto it{dirContext_.rbegin()}; it != targetIt; ++it) {
AddToContextObjectWithDSA(*symbol, Symbol::Flag::OmpPrivate, *it);
}
}
}
// [OMP-4.5]2.15.1.1 Data-sharing Attribute Rules - Predetermined
// - A loop iteration variable for a sequential loop in a parallel
// or task generating construct is private in the innermost such
// construct that encloses the loop
// Loop iteration variables are not well defined for DO WHILE loop.
// Use of DO CONCURRENT inside OpenMP construct is unspecified behavior
// till OpenMP-5.0 standard.
// In above both cases we skip the privatization of iteration variables.
// [OpenMP 5.1] DO CONCURRENT indices are private
bool OmpAttributeVisitor::Pre(const parser::DoConstruct &x) {
if (!dirContext_.empty() && GetContext().withinConstruct) {
llvm::SmallVector<const parser::Name *> ivs;
if (x.IsDoNormal()) {
const parser::Name *iv{GetLoopIndex(x)};
if (iv && iv->symbol)
ivs.push_back(iv);
} else if (x.IsDoConcurrent()) {
const Fortran::parser::LoopControl *loopControl = &*x.GetLoopControl();
const Fortran::parser::LoopControl::Concurrent &concurrent =
std::get<Fortran::parser::LoopControl::Concurrent>(loopControl->u);
const Fortran::parser::ConcurrentHeader &concurrentHeader =
std::get<Fortran::parser::ConcurrentHeader>(concurrent.t);
const std::list<Fortran::parser::ConcurrentControl> &controls =
std::get<std::list<Fortran::parser::ConcurrentControl>>(
concurrentHeader.t);
for (const auto &control : controls) {
const parser::Name *iv{&std::get<0>(control.t)};
if (iv && iv->symbol)
ivs.push_back(iv);
}
}
ordCollapseLevel--;
for (auto iv : ivs) {
if (!iv->symbol->test(Symbol::Flag::OmpPreDetermined)) {
ResolveSeqLoopIndexInParallelOrTaskConstruct(*iv);
} else {
// TODO: conflict checks with explicitly determined DSA
}
if (ordCollapseLevel) {
if (const auto *details{iv->symbol->detailsIf<HostAssocDetails>()}) {
const Symbol *tpSymbol = &details->symbol();
// TODO: DoConcurrent won't capture the following check because a new
// symbol is declared in ResolveIndexName(), which will not have the
// OmpThreadprivate flag.
if (tpSymbol->test(Symbol::Flag::OmpThreadprivate)) {
context_.Say(iv->source,
"Loop iteration variable %s is not allowed in THREADPRIVATE."_err_en_US,
iv->ToString());
}
}
}
}
}
return true;
}
std::int64_t OmpAttributeVisitor::GetAssociatedLoopLevelFromClauses(
const parser::OmpClauseList &x) {
std::int64_t orderedLevel{0};
std::int64_t collapseLevel{0};
const parser::OmpClause *ordClause{nullptr};
const parser::OmpClause *collClause{nullptr};
for (const auto &clause : x.v) {
if (const auto *orderedClause{
std::get_if<parser::OmpClause::Ordered>(&clause.u)}) {
if (const auto v{EvaluateInt64(context_, orderedClause->v)}) {
orderedLevel = *v;
}
ordClause = &clause;
}
if (const auto *collapseClause{
std::get_if<parser::OmpClause::Collapse>(&clause.u)}) {
if (const auto v{EvaluateInt64(context_, collapseClause->v)}) {
collapseLevel = *v;
}
collClause = &clause;
}
}
if (orderedLevel && (!collapseLevel || orderedLevel >= collapseLevel)) {
SetAssociatedClause(*ordClause);
return orderedLevel;
} else if (!orderedLevel && collapseLevel) {
SetAssociatedClause(*collClause);
return collapseLevel;
} // orderedLevel < collapseLevel is an error handled in structural checks
return 1; // default is outermost loop
}
// 2.15.1.1 Data-sharing Attribute Rules - Predetermined
// - The loop iteration variable(s) in the associated do-loop(s) of a do,
// parallel do, taskloop, or distribute construct is (are) private.
// - The loop iteration variable in the associated do-loop of a simd construct
// with just one associated do-loop is linear with a linear-step that is the
// increment of the associated do-loop.
// - The loop iteration variables in the associated do-loops of a simd
// construct with multiple associated do-loops are lastprivate.
void OmpAttributeVisitor::PrivatizeAssociatedLoopIndexAndCheckLoopLevel(
const parser::OpenMPLoopConstruct &x) {
std::int64_t level{GetContext().associatedLoopLevel};
if (level <= 0) {
return;
}
Symbol::Flag ivDSA;
if (!llvm::omp::allSimdSet.test(GetContext().directive)) {
ivDSA = Symbol::Flag::OmpPrivate;
} else if (level == 1) {
ivDSA = Symbol::Flag::OmpLinear;
} else {
ivDSA = Symbol::Flag::OmpLastPrivate;
}
const auto &outer{std::get<std::optional<parser::DoConstruct>>(x.t)};
for (const parser::DoConstruct *loop{&*outer}; loop && level > 0; --level) {
// go through all the nested do-loops and resolve index variables
const parser::Name *iv{GetLoopIndex(*loop)};
if (iv) {
if (auto *symbol{ResolveOmp(*iv, ivDSA, currScope())}) {
symbol->set(Symbol::Flag::OmpPreDetermined);
iv->symbol = symbol; // adjust the symbol within region
AddToContextObjectWithDSA(*symbol, ivDSA);
}
const auto &block{std::get<parser::Block>(loop->t)};
const auto it{block.begin()};
loop = it != block.end() ? GetDoConstructIf(*it) : nullptr;
}
}
CheckAssocLoopLevel(level, GetAssociatedClause());
}
void OmpAttributeVisitor::CheckAssocLoopLevel(
std::int64_t level, const parser::OmpClause *clause) {
if (clause && level != 0) {
context_.Say(clause->source,
"The value of the parameter in the COLLAPSE or ORDERED clause must"
" not be larger than the number of nested loops"
" following the construct."_err_en_US);
}
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPSectionsConstruct &x) {
const auto &beginSectionsDir{
std::get<parser::OmpBeginSectionsDirective>(x.t)};
const auto &beginDir{
std::get<parser::OmpSectionsDirective>(beginSectionsDir.t)};
switch (beginDir.v) {
case llvm::omp::Directive::OMPD_parallel_sections:
case llvm::omp::Directive::OMPD_sections:
PushContext(beginDir.source, beginDir.v);
GetContext().withinConstruct = true;
break;
default:
break;
}
ClearDataSharingAttributeObjects();
return true;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPCriticalConstruct &x) {
const auto &beginCriticalDir{std::get<parser::OmpCriticalDirective>(x.t)};
const auto &endCriticalDir{std::get<parser::OmpEndCriticalDirective>(x.t)};
PushContext(beginCriticalDir.source, llvm::omp::Directive::OMPD_critical);
GetContext().withinConstruct = true;
if (const auto &criticalName{
std::get<std::optional<parser::Name>>(beginCriticalDir.t)}) {
ResolveOmpName(*criticalName, Symbol::Flag::OmpCriticalLock);
}
if (const auto &endCriticalName{
std::get<std::optional<parser::Name>>(endCriticalDir.t)}) {
ResolveOmpName(*endCriticalName, Symbol::Flag::OmpCriticalLock);
}
return true;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPDeclareTargetConstruct &x) {
PushContext(x.source, llvm::omp::Directive::OMPD_declare_target);
const auto &spec{std::get<parser::OmpDeclareTargetSpecifier>(x.t)};
if (const auto *objectList{parser::Unwrap<parser::OmpObjectList>(spec.u)}) {
ResolveOmpObjectList(*objectList, Symbol::Flag::OmpDeclareTarget);
} else if (const auto *clauseList{
parser::Unwrap<parser::OmpClauseList>(spec.u)}) {
for (const auto &clause : clauseList->v) {
if (const auto *toClause{std::get_if<parser::OmpClause::To>(&clause.u)}) {
ResolveOmpObjectList(toClause->v, Symbol::Flag::OmpDeclareTarget);
} else if (const auto *linkClause{
std::get_if<parser::OmpClause::Link>(&clause.u)}) {
ResolveOmpObjectList(linkClause->v, Symbol::Flag::OmpDeclareTarget);
} else if (const auto *enterClause{
std::get_if<parser::OmpClause::Enter>(&clause.u)}) {
ResolveOmpObjectList(enterClause->v, Symbol::Flag::OmpDeclareTarget);
}
}
}
return true;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPThreadprivate &x) {
PushContext(x.source, llvm::omp::Directive::OMPD_threadprivate);
const auto &list{std::get<parser::OmpObjectList>(x.t)};
ResolveOmpObjectList(list, Symbol::Flag::OmpThreadprivate);
return true;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPDeclarativeAllocate &x) {
PushContext(x.source, llvm::omp::Directive::OMPD_allocate);
const auto &list{std::get<parser::OmpObjectList>(x.t)};
ResolveOmpObjectList(list, Symbol::Flag::OmpDeclarativeAllocateDirective);
return false;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPExecutableAllocate &x) {
PushContext(x.source, llvm::omp::Directive::OMPD_allocate);
const auto &list{std::get<std::optional<parser::OmpObjectList>>(x.t)};
if (list) {
ResolveOmpObjectList(*list, Symbol::Flag::OmpExecutableAllocateDirective);
}
return true;
}
bool OmpAttributeVisitor::Pre(const parser::OpenMPAllocatorsConstruct &x) {
PushContext(x.source, llvm::omp::Directive::OMPD_allocators);
const auto &clauseList{std::get<parser::OmpClauseList>(x.t)};
for (const auto &clause : clauseList.v) {
if (const auto *allocClause{
std::get_if<parser::OmpClause::Allocate>(&clause.u)}) {
ResolveOmpObjectList(std::get<parser::OmpObjectList>(allocClause->v.t),
Symbol::Flag::OmpExecutableAllocateDirective);
}
}
return true;
}
void OmpAttributeVisitor::Post(const parser::OmpDefaultClause &x) {
if (!dirContext_.empty()) {
switch (x.v) {
case parser::OmpDefaultClause::Type::Private:
SetContextDefaultDSA(Symbol::Flag::OmpPrivate);
break;
case parser::OmpDefaultClause::Type::Firstprivate:
SetContextDefaultDSA(Symbol::Flag::OmpFirstPrivate);
break;
case parser::OmpDefaultClause::Type::Shared:
SetContextDefaultDSA(Symbol::Flag::OmpShared);
break;
case parser::OmpDefaultClause::Type::None:
SetContextDefaultDSA(Symbol::Flag::OmpNone);
break;
}
}
}
bool OmpAttributeVisitor::IsNestedInDirective(llvm::omp::Directive directive) {
if (dirContext_.size() >= 1) {
for (std::size_t i = dirContext_.size() - 1; i > 0; --i) {
if (dirContext_[i - 1].directive == directive) {
return true;
}
}
}
return false;
}
void OmpAttributeVisitor::Post(const parser::OpenMPExecutableAllocate &x) {
bool hasAllocator = false;
// TODO: Investigate whether searching the clause list can be done with
// parser::Unwrap instead of the following loop
const auto &clauseList{std::get<parser::OmpClauseList>(x.t)};
for (const auto &clause : clauseList.v) {
if (std::get_if<parser::OmpClause::Allocator>(&clause.u)) {
hasAllocator = true;
}
}
if (IsNestedInDirective(llvm::omp::Directive::OMPD_target) && !hasAllocator) {
// TODO: expand this check to exclude the case when a requires
// directive with the dynamic_allocators clause is present
// in the same compilation unit (OMP5.0 2.11.3).
context_.Say(x.source,
"ALLOCATE directives that appear in a TARGET region "
"must specify an allocator clause"_err_en_US);
}
const auto &allocateStmt =
std::get<parser::Statement<parser::AllocateStmt>>(x.t).statement;
if (const auto &list{std::get<std::optional<parser::OmpObjectList>>(x.t)}) {
CheckAllNamesInAllocateStmt(
std::get<parser::Verbatim>(x.t).source, *list, allocateStmt);
}
if (const auto &subDirs{
std::get<std::optional<std::list<parser::OpenMPDeclarativeAllocate>>>(
x.t)}) {
for (const auto &dalloc : *subDirs) {
CheckAllNamesInAllocateStmt(std::get<parser::Verbatim>(dalloc.t).source,
std::get<parser::OmpObjectList>(dalloc.t), allocateStmt);
}
}
PopContext();
}
void OmpAttributeVisitor::Post(const parser::OpenMPAllocatorsConstruct &x) {
const auto &dir{std::get<parser::Verbatim>(x.t)};
const auto &clauseList{std::get<parser::OmpClauseList>(x.t)};
for (const auto &clause : clauseList.v) {
if (const auto *alloc{
std::get_if<parser::OmpClause::Allocate>(&clause.u)}) {
CheckAllNamesInAllocateStmt(dir.source,
std::get<parser::OmpObjectList>(alloc->v.t),
std::get<parser::Statement<parser::AllocateStmt>>(x.t).statement);
const auto &allocMod{
std::get<std::optional<parser::OmpAllocateClause::AllocateModifier>>(
alloc->v.t)};
// TODO: As with allocate directive, exclude the case when a requires
// directive with the dynamic_allocators clause is present in
// the same compilation unit (OMP5.0 2.11.3).
if (IsNestedInDirective(llvm::omp::Directive::OMPD_target) &&
(!allocMod.has_value() ||
std::holds_alternative<
parser::OmpAllocateClause::AllocateModifier::Align>(
allocMod->u))) {
context_.Say(x.source,
"ALLOCATORS directives that appear in a TARGET region "
"must specify an allocator"_err_en_US);
}
}
}
PopContext();
}
static bool IsPrivatizable(const Symbol *sym) {
auto *misc{sym->detailsIf<MiscDetails>()};
return !IsProcedure(*sym) && !IsNamedConstant(*sym) &&
!sym->owner().IsDerivedType() &&
sym->owner().kind() != Scope::Kind::ImpliedDos &&
!sym->detailsIf<semantics::AssocEntityDetails>() &&
!sym->detailsIf<semantics::NamelistDetails>() &&
(!misc ||
(misc->kind() != MiscDetails::Kind::ComplexPartRe &&
misc->kind() != MiscDetails::Kind::ComplexPartIm &&
misc->kind() != MiscDetails::Kind::KindParamInquiry &&
misc->kind() != MiscDetails::Kind::LenParamInquiry &&
misc->kind() != MiscDetails::Kind::ConstructName));
}
void OmpAttributeVisitor::CreateImplicitSymbols(
const Symbol *symbol, std::optional<Symbol::Flag> setFlag) {
if (!IsPrivatizable(symbol)) {
return;
}
// Implicitly determined DSAs
// OMP 5.2 5.1.1 - Variables Referenced in a Construct
Symbol *lastDeclSymbol = nullptr;
std::optional<Symbol::Flag> prevDSA;
for (int dirDepth{0}; dirDepth < (int)dirContext_.size(); ++dirDepth) {
DirContext &dirContext = dirContext_[dirDepth];
std::optional<Symbol::Flag> dsa;
for (auto symMap : dirContext.objectWithDSA) {
// if the `symbol` already has a data-sharing attribute
if (symMap.first->name() == symbol->name()) {
dsa = symMap.second;
break;
}
}
// When handling each implicit rule for a given symbol, one of the
// following 3 actions may be taken:
// 1. Declare a new private symbol.
// 2. Create a new association symbol with no flags, that will represent
// a shared symbol in the current scope. Note that symbols without
// any private flags are considered as shared.
// 3. Use the last declared private symbol, by inserting a new symbol
// in the scope being processed, associated with it.
// If no private symbol was declared previously, then no association
// is needed and the symbol from the enclosing scope will be
// inherited by the current one.
//
// Because of how symbols are collected in lowering, not inserting a new
// symbol in the last case could lead to the conclusion that a symbol
// from an enclosing construct was declared in the current construct,
// which would result in wrong privatization code being generated.
// Consider the following example:
//
// !$omp parallel default(private) ! p1
// !$omp parallel default(private) shared(x) ! p2
// x = 10
// !$omp end parallel
// !$omp end parallel
//
// If a new x symbol was not inserted in the inner parallel construct
// (p2), it would use the x symbol definition from the enclosing scope.
// Then, when p2's default symbols were collected in lowering, the x
// symbol from the outer parallel construct (p1) would be collected, as
// it would have the private flag set.
// This would make x appear to be defined in p2, causing it to be
// privatized in p2 and its privatization in p1 to be skipped.
auto makePrivateSymbol = [&](Symbol::Flag flag) {
const Symbol *hostSymbol =
lastDeclSymbol ? lastDeclSymbol : &symbol->GetUltimate();
lastDeclSymbol = DeclareNewPrivateAccessEntity(
*hostSymbol, flag, context_.FindScope(dirContext.directiveSource));
if (setFlag) {
lastDeclSymbol->set(*setFlag);
}
return lastDeclSymbol;
};
auto makeSharedSymbol = [&]() {
const Symbol *hostSymbol =
lastDeclSymbol ? lastDeclSymbol : &symbol->GetUltimate();
MakeAssocSymbol(symbol->name(), *hostSymbol,
context_.FindScope(dirContext.directiveSource));
};
auto useLastDeclSymbol = [&]() {
if (lastDeclSymbol) {
makeSharedSymbol();
}
};
bool taskGenDir = llvm::omp::taskGeneratingSet.test(dirContext.directive);
bool targetDir = llvm::omp::allTargetSet.test(dirContext.directive);
bool parallelDir = llvm::omp::allParallelSet.test(dirContext.directive);
bool teamsDir = llvm::omp::allTeamsSet.test(dirContext.directive);
if (dsa.has_value()) {
if (dsa.value() == Symbol::Flag::OmpShared &&
(parallelDir || taskGenDir || teamsDir))
makeSharedSymbol();
// Private symbols will have been declared already.
prevDSA = dsa;
continue;
}
if (dirContext.defaultDSA == Symbol::Flag::OmpPrivate ||
dirContext.defaultDSA == Symbol::Flag::OmpFirstPrivate ||
dirContext.defaultDSA == Symbol::Flag::OmpShared) {
// 1) default
// Allowed only with parallel, teams and task generating constructs.
assert(parallelDir || taskGenDir || teamsDir);
if (dirContext.defaultDSA != Symbol::Flag::OmpShared)
makePrivateSymbol(dirContext.defaultDSA);
else
makeSharedSymbol();
dsa = dirContext.defaultDSA;
} else if (parallelDir) {
// 2) parallel -> shared
makeSharedSymbol();
dsa = Symbol::Flag::OmpShared;
} else if (!taskGenDir && !targetDir) {
// 3) enclosing context
useLastDeclSymbol();
dsa = prevDSA;
} else if (targetDir) {
// TODO 4) not mapped target variable -> firstprivate
dsa = prevDSA;
} else if (taskGenDir) {
// TODO 5) dummy arg in orphaned taskgen construct -> firstprivate
if (prevDSA == Symbol::Flag::OmpShared) {
// 6) shared in enclosing context -> shared
makeSharedSymbol();
dsa = Symbol::Flag::OmpShared;
} else {
// 7) firstprivate
dsa = Symbol::Flag::OmpFirstPrivate;
makePrivateSymbol(*dsa)->set(Symbol::Flag::OmpImplicit);
}
}
prevDSA = dsa;
}
}
// For OpenMP constructs, check all the data-refs within the constructs
// and adjust the symbol for each Name if necessary
void OmpAttributeVisitor::Post(const parser::Name &name) {
auto *symbol{name.symbol};
if (symbol && !dirContext_.empty() && GetContext().withinConstruct) {
if (IsPrivatizable(symbol) && !IsObjectWithDSA(*symbol)) {
// TODO: create a separate function to go through the rules for
// predetermined, explicitly determined, and implicitly
// determined data-sharing attributes (2.15.1.1).
if (Symbol * found{currScope().FindSymbol(name.source)}) {
if (symbol != found) {
name.symbol = found; // adjust the symbol within region
} else if (GetContext().defaultDSA == Symbol::Flag::OmpNone &&
!symbol->test(Symbol::Flag::OmpThreadprivate) &&
// Exclude indices of sequential loops that are privatised in
// the scope of the parallel region, and not in this scope.
// TODO: check whether this should be caught in IsObjectWithDSA
!symbol->test(Symbol::Flag::OmpPrivate)) {
context_.Say(name.source,
"The DEFAULT(NONE) clause requires that '%s' must be listed in "
"a data-sharing attribute clause"_err_en_US,
symbol->name());
}
}
}
if (Symbol * found{currScope().FindSymbol(name.source)}) {
if (found->test(semantics::Symbol::Flag::OmpThreadprivate))
return;
}
if (auto *stmtFunction{symbol->detailsIf<semantics::SubprogramDetails>()};
stmtFunction && stmtFunction->stmtFunction()) {
// Each non-dummy argument from a statement function must be handled too,
// as if it was explicitly referenced.
semantics::UnorderedSymbolSet symbols{
CollectSymbols(stmtFunction->stmtFunction().value())};
for (const auto &sym : symbols) {
if (!IsStmtFunctionDummy(sym) && !IsObjectWithDSA(*sym)) {
CreateImplicitSymbols(&*sym, Symbol::Flag::OmpFromStmtFunction);
}
}
} else {
CreateImplicitSymbols(symbol);
}
} // within OpenMP construct
}
Symbol *OmpAttributeVisitor::ResolveName(const parser::Name *name) {
if (auto *resolvedSymbol{
name ? GetContext().scope.FindSymbol(name->source) : nullptr}) {
name->symbol = resolvedSymbol;
return resolvedSymbol;
} else {
return nullptr;
}
}
void OmpAttributeVisitor::ResolveOmpName(
const parser::Name &name, Symbol::Flag ompFlag) {
if (ResolveName(&name)) {
if (auto *resolvedSymbol{ResolveOmp(name, ompFlag, currScope())}) {
if (dataSharingAttributeFlags.test(ompFlag)) {
AddToContextObjectWithDSA(*resolvedSymbol, ompFlag);
}
}
} else if (ompFlag == Symbol::Flag::OmpCriticalLock) {
const auto pair{
GetContext().scope.try_emplace(name.source, Attrs{}, UnknownDetails{})};
CHECK(pair.second);
name.symbol = &pair.first->second.get();
}
}
void OmpAttributeVisitor::ResolveOmpNameList(
const std::list<parser::Name> &nameList, Symbol::Flag ompFlag) {
for (const auto &name : nameList) {
ResolveOmpName(name, ompFlag);
}
}
Symbol *OmpAttributeVisitor::ResolveOmpCommonBlockName(
const parser::Name *name) {
if (!name) {
return nullptr;
}
if (auto *cb{GetProgramUnitOrBlockConstructContaining(GetContext().scope)
.FindCommonBlock(name->source)}) {
name->symbol = cb;
return cb;
}
return nullptr;
}
// Use this function over ResolveOmpName when an omp object's scope needs
// resolving, it's symbol flag isn't important and a simple check for resolution
// failure is desired. Using ResolveOmpName means needing to work with the
// context to check for failure, whereas here a pointer comparison is all that's
// needed.
Symbol *OmpAttributeVisitor::ResolveOmpObjectScope(const parser::Name *name) {
// TODO: Investigate whether the following block can be replaced by, or
// included in, the ResolveOmpName function
if (auto *prev{name ? GetContext().scope.parent().FindSymbol(name->source)
: nullptr}) {
name->symbol = prev;
return nullptr;
}
// TODO: Investigate whether the following block can be replaced by, or
// included in, the ResolveOmpName function
if (auto *ompSymbol{
name ? GetContext().scope.FindSymbol(name->source) : nullptr}) {
name->symbol = ompSymbol;
return ompSymbol;
}
return nullptr;
}
void OmpAttributeVisitor::ResolveOmpObjectList(
const parser::OmpObjectList &ompObjectList, Symbol::Flag ompFlag) {
for (const auto &ompObject : ompObjectList.v) {
ResolveOmpObject(ompObject, ompFlag);
}
}
void OmpAttributeVisitor::ResolveOmpObject(
const parser::OmpObject &ompObject, Symbol::Flag ompFlag) {
common::visit(
common::visitors{
[&](const parser::Designator &designator) {
if (const auto *name{
semantics::getDesignatorNameIfDataRef(designator)}) {
if (auto *symbol{ResolveOmp(*name, ompFlag, currScope())}) {
auto checkExclusivelists =
[&](const Symbol *symbol1, Symbol::Flag firstOmpFlag,
Symbol *symbol2, Symbol::Flag secondOmpFlag) {
if ((symbol1->test(firstOmpFlag) &&
symbol2->test(secondOmpFlag)) ||
(symbol1->test(secondOmpFlag) &&
symbol2->test(firstOmpFlag))) {
context_.Say(designator.source,
"Variable '%s' may not "
"appear on both %s and %s "
"clauses on a %s construct"_err_en_US,
symbol2->name(),
const_cast<Symbol *>(symbol1)->OmpFlagToClauseName(
firstOmpFlag),
symbol2->OmpFlagToClauseName(secondOmpFlag),
parser::ToUpperCaseLetters(
llvm::omp::getOpenMPDirectiveName(
GetContext().directive)
.str()));
}
};
if (dataCopyingAttributeFlags.test(ompFlag)) {
CheckDataCopyingClause(*name, *symbol, ompFlag);
} else {
AddToContextObjectWithDSA(*symbol, ompFlag);
if (dataSharingAttributeFlags.test(ompFlag)) {
CheckMultipleAppearances(*name, *symbol, ompFlag);
}
if (privateDataSharingAttributeFlags.test(ompFlag)) {
CheckObjectInNamelist(*name, *symbol, ompFlag);
}
if (ompFlag == Symbol::Flag::OmpAllocate) {
AddAllocateName(name);
}
}
if (ompFlag == Symbol::Flag::OmpDeclarativeAllocateDirective &&
IsAllocatable(*symbol) &&
!IsNestedInDirective(llvm::omp::Directive::OMPD_allocate)) {
context_.Say(designator.source,
"List items specified in the ALLOCATE directive must not "
"have the ALLOCATABLE attribute unless the directive is "
"associated with an ALLOCATE statement"_err_en_US);
}
if ((ompFlag == Symbol::Flag::OmpDeclarativeAllocateDirective ||
ompFlag ==
Symbol::Flag::OmpExecutableAllocateDirective) &&
ResolveOmpObjectScope(name) == nullptr) {
context_.Say(designator.source, // 2.15.3
"List items must be declared in the same scoping unit "
"in which the %s directive appears"_err_en_US,
parser::ToUpperCaseLetters(
llvm::omp::getOpenMPDirectiveName(
GetContext().directive)
.str()));
}
if (GetContext().directive ==
llvm::omp::Directive::OMPD_target_data) {
checkExclusivelists(symbol, Symbol::Flag::OmpUseDevicePtr,
symbol, Symbol::Flag::OmpUseDeviceAddr);
}
if (llvm::omp::allDistributeSet.test(GetContext().directive)) {
checkExclusivelists(symbol, Symbol::Flag::OmpFirstPrivate,
symbol, Symbol::Flag::OmpLastPrivate);
}
if (llvm::omp::allTargetSet.test(GetContext().directive)) {
checkExclusivelists(symbol, Symbol::Flag::OmpIsDevicePtr,
symbol, Symbol::Flag::OmpHasDeviceAddr);
const auto *hostAssocSym{symbol};
if (!(symbol->test(Symbol::Flag::OmpIsDevicePtr) ||
symbol->test(Symbol::Flag::OmpHasDeviceAddr))) {
if (const auto *details{
symbol->detailsIf<HostAssocDetails>()}) {
hostAssocSym = &details->symbol();
}
}
Symbol::Flag dataMappingAttributeFlags[] = {
Symbol::Flag::OmpMapTo, Symbol::Flag::OmpMapFrom,
Symbol::Flag::OmpMapToFrom, Symbol::Flag::OmpMapAlloc,
Symbol::Flag::OmpMapRelease, Symbol::Flag::OmpMapDelete,
Symbol::Flag::OmpIsDevicePtr,
Symbol::Flag::OmpHasDeviceAddr};
Symbol::Flag dataSharingAttributeFlags[] = {
Symbol::Flag::OmpPrivate, Symbol::Flag::OmpFirstPrivate,
Symbol::Flag::OmpLastPrivate, Symbol::Flag::OmpShared,
Symbol::Flag::OmpLinear};
for (Symbol::Flag ompFlag1 : dataMappingAttributeFlags) {
for (Symbol::Flag ompFlag2 : dataSharingAttributeFlags) {
checkExclusivelists(
hostAssocSym, ompFlag1, symbol, ompFlag2);
}
}
}
}
} else {
// Array sections to be changed to substrings as needed
if (AnalyzeExpr(context_, designator)) {
if (std::holds_alternative<parser::Substring>(designator.u)) {
context_.Say(designator.source,
"Substrings are not allowed on OpenMP "
"directives or clauses"_err_en_US);
}
}
// other checks, more TBD
}
},
[&](const parser::Name &name) { // common block
if (auto *symbol{ResolveOmpCommonBlockName(&name)}) {
if (!dataCopyingAttributeFlags.test(ompFlag)) {
CheckMultipleAppearances(
name, *symbol, Symbol::Flag::OmpCommonBlock);
}
// 2.15.3 When a named common block appears in a list, it has the
// same meaning as if every explicit member of the common block
// appeared in the list
auto &details{symbol->get<CommonBlockDetails>()};
unsigned index{0};
for (auto &object : details.objects()) {
if (auto *resolvedObject{
ResolveOmp(*object, ompFlag, currScope())}) {
if (dataCopyingAttributeFlags.test(ompFlag)) {
CheckDataCopyingClause(name, *resolvedObject, ompFlag);
} else {
AddToContextObjectWithDSA(*resolvedObject, ompFlag);
}
details.replace_object(*resolvedObject, index);
}
index++;
}
} else {
context_.Say(name.source, // 2.15.3
"COMMON block must be declared in the same scoping unit "
"in which the OpenMP directive or clause appears"_err_en_US);
}
},
},
ompObject.u);
}
Symbol *OmpAttributeVisitor::ResolveOmp(
const parser::Name &name, Symbol::Flag ompFlag, Scope &scope) {
if (ompFlagsRequireNewSymbol.test(ompFlag)) {
return DeclarePrivateAccessEntity(name, ompFlag, scope);
} else {
return DeclareOrMarkOtherAccessEntity(name, ompFlag);
}
}
Symbol *OmpAttributeVisitor::ResolveOmp(
Symbol &symbol, Symbol::Flag ompFlag, Scope &scope) {
if (ompFlagsRequireNewSymbol.test(ompFlag)) {
return DeclarePrivateAccessEntity(symbol, ompFlag, scope);
} else {
return DeclareOrMarkOtherAccessEntity(symbol, ompFlag);
}
}
Symbol *OmpAttributeVisitor::DeclareOrMarkOtherAccessEntity(
const parser::Name &name, Symbol::Flag ompFlag) {
Symbol *prev{currScope().FindSymbol(name.source)};
if (!name.symbol || !prev) {
return nullptr;
} else if (prev != name.symbol) {
name.symbol = prev;
}
return DeclareOrMarkOtherAccessEntity(*prev, ompFlag);
}
Symbol *OmpAttributeVisitor::DeclareOrMarkOtherAccessEntity(
Symbol &object, Symbol::Flag ompFlag) {
if (ompFlagsRequireMark.test(ompFlag)) {
object.set(ompFlag);
}
return &object;
}
static bool WithMultipleAppearancesOmpException(
const Symbol &symbol, Symbol::Flag flag) {
return (flag == Symbol::Flag::OmpFirstPrivate &&
symbol.test(Symbol::Flag::OmpLastPrivate)) ||
(flag == Symbol::Flag::OmpLastPrivate &&
symbol.test(Symbol::Flag::OmpFirstPrivate));
}
void OmpAttributeVisitor::CheckMultipleAppearances(
const parser::Name &name, const Symbol &symbol, Symbol::Flag ompFlag) {
const auto *target{&symbol};
if (ompFlagsRequireNewSymbol.test(ompFlag)) {
if (const auto *details{symbol.detailsIf<HostAssocDetails>()}) {
target = &details->symbol();
}
}
if (HasDataSharingAttributeObject(*target) &&
!WithMultipleAppearancesOmpException(symbol, ompFlag)) {
context_.Say(name.source,
"'%s' appears in more than one data-sharing clause "
"on the same OpenMP directive"_err_en_US,
name.ToString());
} else {
AddDataSharingAttributeObject(*target);
if (privateDataSharingAttributeFlags.test(ompFlag)) {
AddPrivateDataSharingAttributeObjects(*target);
}
}
}
void ResolveAccParts(SemanticsContext &context, const parser::ProgramUnit &node,
Scope *topScope) {
if (context.IsEnabled(common::LanguageFeature::OpenACC)) {
AccAttributeVisitor{context, topScope}.Walk(node);
}
}
void ResolveOmpParts(
SemanticsContext &context, const parser::ProgramUnit &node) {
if (context.IsEnabled(common::LanguageFeature::OpenMP)) {
OmpAttributeVisitor{context}.Walk(node);
if (!context.AnyFatalError()) {
// The data-sharing attribute of the loop iteration variable for a
// sequential loop (2.15.1.1) can only be determined when visiting
// the corresponding DoConstruct, a second walk is to adjust the
// symbols for all the data-refs of that loop iteration variable
// prior to the DoConstruct.
OmpAttributeVisitor{context}.Walk(node);
}
}
}
void ResolveOmpTopLevelParts(
SemanticsContext &context, const parser::Program &program) {
if (!context.IsEnabled(common::LanguageFeature::OpenMP)) {
return;
}
// Gather REQUIRES clauses from all non-module top-level program unit symbols,
// combine them together ensuring compatibility and apply them to all these
// program units. Modules are skipped because their REQUIRES clauses should be
// propagated via USE statements instead.
WithOmpDeclarative::RequiresFlags combinedFlags;
std::optional<common::OmpAtomicDefaultMemOrderType> combinedMemOrder;
// Function to go through non-module top level program units and extract
// REQUIRES information to be processed by a function-like argument.
auto processProgramUnits{[&](auto processFn) {
for (const parser::ProgramUnit &unit : program.v) {
if (!std::holds_alternative<common::Indirection<parser::Module>>(
unit.u) &&
!std::holds_alternative<common::Indirection<parser::Submodule>>(
unit.u) &&
!std::holds_alternative<
common::Indirection<parser::CompilerDirective>>(unit.u)) {
Symbol *symbol{common::visit(
[&context](auto &x) {
Scope *scope = GetScope(context, x.value());
return scope ? scope->symbol() : nullptr;
},
unit.u)};
// FIXME There is no symbol defined for MainProgram units in certain
// circumstances, so REQUIRES information has no place to be stored in
// these cases.
if (!symbol) {
continue;
}
common::visit(
[&](auto &details) {
if constexpr (std::is_convertible_v<decltype(&details),
WithOmpDeclarative *>) {
processFn(*symbol, details);
}
},
symbol->details());
}
}
}};
// Combine global REQUIRES information from all program units except modules
// and submodules.
processProgramUnits([&](Symbol &symbol, WithOmpDeclarative &details) {
if (const WithOmpDeclarative::RequiresFlags *
flags{details.ompRequires()}) {
combinedFlags |= *flags;
}
if (const common::OmpAtomicDefaultMemOrderType *
memOrder{details.ompAtomicDefaultMemOrder()}) {
if (combinedMemOrder && *combinedMemOrder != *memOrder) {
context.Say(symbol.scope()->sourceRange(),
"Conflicting '%s' REQUIRES clauses found in compilation "
"unit"_err_en_US,
parser::ToUpperCaseLetters(llvm::omp::getOpenMPClauseName(
llvm::omp::Clause::OMPC_atomic_default_mem_order)
.str()));
}
combinedMemOrder = *memOrder;
}
});
// Update all program units except modules and submodules with the combined
// global REQUIRES information.
processProgramUnits([&](Symbol &, WithOmpDeclarative &details) {
if (combinedFlags.any()) {
details.set_ompRequires(combinedFlags);
}
if (combinedMemOrder) {
details.set_ompAtomicDefaultMemOrder(*combinedMemOrder);
}
});
}
static bool IsSymbolInCommonBlock(const Symbol &symbol) {
// TODO Improve the performance of this predicate function.
// Going through all symbols sequentially, in all common blocks, can be
// slow when there are many symbols. A possible optimization is to add
// an OmpInCommonBlock flag to Symbol, to make it possible to quickly
// test if a given symbol is in a common block.
for (const auto &cb : symbol.owner().commonBlocks()) {
if (IsCommonBlockContaining(cb.second.get(), symbol)) {
return true;
}
}
return false;
}
static bool IsSymbolThreadprivate(const Symbol &symbol) {
if (const auto *details{symbol.detailsIf<HostAssocDetails>()}) {
return details->symbol().test(Symbol::Flag::OmpThreadprivate);
}
return symbol.test(Symbol::Flag::OmpThreadprivate);
}
static bool IsSymbolPrivate(const Symbol &symbol) {
if (symbol.test(Symbol::Flag::OmpPrivate) ||
symbol.test(Symbol::Flag::OmpFirstPrivate)) {
return true;
}
// A symbol that has not gone through constructs that may privatize the
// original symbol may be predetermined as private.
// (OMP 5.2 5.1.1 - Variables Referenced in a Construct)
if (symbol == symbol.GetUltimate()) {
switch (symbol.owner().kind()) {
case Scope::Kind::MainProgram:
case Scope::Kind::Subprogram:
case Scope::Kind::BlockConstruct:
return !symbol.attrs().test(Attr::SAVE) &&
!symbol.attrs().test(Attr::PARAMETER) && !IsAssumedShape(symbol) &&
!IsSymbolInCommonBlock(symbol);
default:
return false;
}
}
return false;
}
void OmpAttributeVisitor::CheckDataCopyingClause(
const parser::Name &name, const Symbol &symbol, Symbol::Flag ompFlag) {
if (ompFlag == Symbol::Flag::OmpCopyIn) {
// List of items/objects that can appear in a 'copyin' clause must be
// 'threadprivate'
if (!IsSymbolThreadprivate(symbol)) {
context_.Say(name.source,
"Non-THREADPRIVATE object '%s' in COPYIN clause"_err_en_US,
symbol.name());
}
} else if (ompFlag == Symbol::Flag::OmpCopyPrivate &&
GetContext().directive == llvm::omp::Directive::OMPD_single) {
// A list item that appears in a 'copyprivate' clause may not appear on a
// 'private' or 'firstprivate' clause on a single construct
if (IsObjectWithDSA(symbol) &&
(symbol.test(Symbol::Flag::OmpPrivate) ||
symbol.test(Symbol::Flag::OmpFirstPrivate))) {
context_.Say(name.source,
"COPYPRIVATE variable '%s' may not appear on a PRIVATE or "
"FIRSTPRIVATE clause on a SINGLE construct"_err_en_US,
symbol.name());
} else if (!IsSymbolThreadprivate(symbol) && !IsSymbolPrivate(symbol)) {
// List of items/objects that can appear in a 'copyprivate' clause must be
// either 'private' or 'threadprivate' in enclosing context.
context_.Say(name.source,
"COPYPRIVATE variable '%s' is not PRIVATE or THREADPRIVATE in "
"outer context"_err_en_US,
symbol.name());
}
}
}
void OmpAttributeVisitor::CheckObjectInNamelist(
const parser::Name &name, const Symbol &symbol, Symbol::Flag ompFlag) {
const auto &ultimateSymbol{symbol.GetUltimate()};
llvm::StringRef clauseName{"PRIVATE"};
if (ompFlag == Symbol::Flag::OmpFirstPrivate) {
clauseName = "FIRSTPRIVATE";
} else if (ompFlag == Symbol::Flag::OmpLastPrivate) {
clauseName = "LASTPRIVATE";
}
if (ultimateSymbol.test(Symbol::Flag::InNamelist)) {
context_.Say(name.source,
"Variable '%s' in NAMELIST cannot be in a %s clause"_err_en_US,
name.ToString(), clauseName.str());
}
}
void OmpAttributeVisitor::CheckSourceLabel(const parser::Label &label) {
// Get the context to check if the statement causing a jump to the 'label' is
// in an enclosing OpenMP construct
std::optional<DirContext> thisContext{GetContextIf()};
sourceLabels_.emplace(
label, std::make_pair(currentStatementSource_, thisContext));
// Check if the statement with 'label' to which a jump is being introduced
// has already been encountered
auto it{targetLabels_.find(label)};
if (it != targetLabels_.end()) {
// Check if both the statement with 'label' and the statement that causes a
// jump to the 'label' are in the same scope
CheckLabelContext(currentStatementSource_, it->second.first, thisContext,
it->second.second);
}
}
// Check for invalid branch into or out of OpenMP structured blocks
void OmpAttributeVisitor::CheckLabelContext(const parser::CharBlock source,
const parser::CharBlock target, std::optional<DirContext> sourceContext,
std::optional<DirContext> targetContext) {
if (targetContext &&
(!sourceContext ||
(sourceContext->scope != targetContext->scope &&
!DoesScopeContain(
&targetContext->scope, sourceContext->scope)))) {
context_
.Say(source, "invalid branch into an OpenMP structured block"_err_en_US)
.Attach(target, "In the enclosing %s directive branched into"_en_US,
parser::ToUpperCaseLetters(
llvm::omp::getOpenMPDirectiveName(targetContext->directive)
.str()));
}
if (sourceContext &&
(!targetContext ||
(sourceContext->scope != targetContext->scope &&
!DoesScopeContain(
&sourceContext->scope, targetContext->scope)))) {
context_
.Say(source,
"invalid branch leaving an OpenMP structured block"_err_en_US)
.Attach(target, "Outside the enclosing %s directive"_en_US,
parser::ToUpperCaseLetters(
llvm::omp::getOpenMPDirectiveName(sourceContext->directive)
.str()));
}
}
// Goes through the names in an OmpObjectList and checks if each name appears
// in the given allocate statement
void OmpAttributeVisitor::CheckAllNamesInAllocateStmt(
const parser::CharBlock &source, const parser::OmpObjectList &ompObjectList,
const parser::AllocateStmt &allocate) {
for (const auto &obj : ompObjectList.v) {
if (const auto *d{std::get_if<parser::Designator>(&obj.u)}) {
if (const auto *ref{std::get_if<parser::DataRef>(&d->u)}) {
if (const auto *n{std::get_if<parser::Name>(&ref->u)}) {
CheckNameInAllocateStmt(source, *n, allocate);
}
}
}
}
}
void OmpAttributeVisitor::CheckNameInAllocateStmt(
const parser::CharBlock &source, const parser::Name &name,
const parser::AllocateStmt &allocate) {
for (const auto &allocation :
std::get<std::list<parser::Allocation>>(allocate.t)) {
const auto &allocObj = std::get<parser::AllocateObject>(allocation.t);
if (const auto *n{std::get_if<parser::Name>(&allocObj.u)}) {
if (n->source == name.source) {
return;
}
}
}
context_.Say(source,
"Object '%s' in %s directive not "
"found in corresponding ALLOCATE statement"_err_en_US,
name.ToString(),
parser::ToUpperCaseLetters(
llvm::omp::getOpenMPDirectiveName(GetContext().directive).str()));
}
void OmpAttributeVisitor::AddOmpRequiresToScope(Scope &scope,
WithOmpDeclarative::RequiresFlags flags,
std::optional<common::OmpAtomicDefaultMemOrderType> memOrder) {
Scope *scopeIter = &scope;
do {
if (Symbol * symbol{scopeIter->symbol()}) {
common::visit(
[&](auto &details) {
// Store clauses information into the symbol for the parent and
// enclosing modules, programs, functions and subroutines.
if constexpr (std::is_convertible_v<decltype(&details),
WithOmpDeclarative *>) {
if (flags.any()) {
if (const WithOmpDeclarative::RequiresFlags *
otherFlags{details.ompRequires()}) {
flags |= *otherFlags;
}
details.set_ompRequires(flags);
}
if (memOrder) {
if (details.has_ompAtomicDefaultMemOrder() &&
*details.ompAtomicDefaultMemOrder() != *memOrder) {
context_.Say(scopeIter->sourceRange(),
"Conflicting '%s' REQUIRES clauses found in compilation "
"unit"_err_en_US,
parser::ToUpperCaseLetters(llvm::omp::getOpenMPClauseName(
llvm::omp::Clause::OMPC_atomic_default_mem_order)
.str()));
}
details.set_ompAtomicDefaultMemOrder(*memOrder);
}
}
},
symbol->details());
}
scopeIter = &scopeIter->parent();
} while (!scopeIter->IsGlobal());
}
void OmpAttributeVisitor::IssueNonConformanceWarning(
llvm::omp::Directive D, parser::CharBlock source) {
std::string warnStr = "";
std::string dirName = llvm::omp::getOpenMPDirectiveName(D).str();
switch (D) {
case llvm::omp::OMPD_master:
warnStr = "OpenMP directive '" + dirName +
"' has been deprecated, please use 'masked' instead.";
break;
case llvm::omp::OMPD_target_loop:
default:
warnStr = "OpenMP directive '" + dirName + "' has been deprecated.";
}
if (context_.ShouldWarn(common::UsageWarning::OpenMPUsage)) {
context_.Say(source, "%s"_warn_en_US, warnStr);
}
}
} // namespace Fortran::semantics
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