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//===-- lib/Semantics/check-acc-structure.cpp -----------------------------===//
//
// 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 "check-acc-structure.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Semantics/tools.h"
#define CHECK_SIMPLE_CLAUSE(X, Y) \
void AccStructureChecker::Enter(const parser::AccClause::X &) { \
CheckAllowed(llvm::acc::Clause::Y); \
}
#define CHECK_REQ_SCALAR_INT_CONSTANT_CLAUSE(X, Y) \
void AccStructureChecker::Enter(const parser::AccClause::X &c) { \
CheckAllowed(llvm::acc::Clause::Y); \
RequiresConstantPositiveParameter(llvm::acc::Clause::Y, c.v); \
}
namespace Fortran::semantics {
static constexpr inline AccClauseSet
computeConstructOnlyAllowedAfterDeviceTypeClauses{
llvm::acc::Clause::ACCC_async, llvm::acc::Clause::ACCC_wait,
llvm::acc::Clause::ACCC_num_gangs, llvm::acc::Clause::ACCC_num_workers,
llvm::acc::Clause::ACCC_vector_length};
static constexpr inline AccClauseSet loopOnlyAllowedAfterDeviceTypeClauses{
llvm::acc::Clause::ACCC_auto, llvm::acc::Clause::ACCC_collapse,
llvm::acc::Clause::ACCC_independent, llvm::acc::Clause::ACCC_gang,
llvm::acc::Clause::ACCC_seq, llvm::acc::Clause::ACCC_tile,
llvm::acc::Clause::ACCC_vector, llvm::acc::Clause::ACCC_worker};
static constexpr inline AccClauseSet updateOnlyAllowedAfterDeviceTypeClauses{
llvm::acc::Clause::ACCC_async, llvm::acc::Clause::ACCC_wait};
static constexpr inline AccClauseSet routineOnlyAllowedAfterDeviceTypeClauses{
llvm::acc::Clause::ACCC_bind, llvm::acc::Clause::ACCC_gang,
llvm::acc::Clause::ACCC_vector, llvm::acc::Clause::ACCC_worker};
bool AccStructureChecker::CheckAllowedModifier(llvm::acc::Clause clause) {
if (GetContext().directive == llvm::acc::ACCD_enter_data ||
GetContext().directive == llvm::acc::ACCD_exit_data) {
context_.Say(GetContext().clauseSource,
"Modifier is not allowed for the %s clause "
"on the %s directive"_err_en_US,
parser::ToUpperCaseLetters(getClauseName(clause).str()),
ContextDirectiveAsFortran());
return true;
}
return false;
}
bool AccStructureChecker::IsComputeConstruct(
llvm::acc::Directive directive) const {
return directive == llvm::acc::ACCD_parallel ||
directive == llvm::acc::ACCD_parallel_loop ||
directive == llvm::acc::ACCD_serial ||
directive == llvm::acc::ACCD_serial_loop ||
directive == llvm::acc::ACCD_kernels ||
directive == llvm::acc::ACCD_kernels_loop;
}
bool AccStructureChecker::IsInsideComputeConstruct() const {
if (dirContext_.size() <= 1) {
return false;
}
// Check all nested context skipping the first one.
for (std::size_t i = dirContext_.size() - 1; i > 0; --i) {
if (IsComputeConstruct(dirContext_[i - 1].directive)) {
return true;
}
}
return false;
}
void AccStructureChecker::CheckNotInComputeConstruct() {
if (IsInsideComputeConstruct()) {
context_.Say(GetContext().directiveSource,
"Directive %s may not be called within a compute region"_err_en_US,
ContextDirectiveAsFortran());
}
}
void AccStructureChecker::Enter(const parser::AccClause &x) {
SetContextClause(x);
}
void AccStructureChecker::Leave(const parser::AccClauseList &) {}
void AccStructureChecker::Enter(const parser::OpenACCBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::AccBeginBlockDirective>(x.t)};
const auto &endBlockDir{std::get<parser::AccEndBlockDirective>(x.t)};
const auto &beginAccBlockDir{
std::get<parser::AccBlockDirective>(beginBlockDir.t)};
CheckMatching(beginAccBlockDir, endBlockDir.v);
PushContextAndClauseSets(beginAccBlockDir.source, beginAccBlockDir.v);
}
void AccStructureChecker::Leave(const parser::OpenACCBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::AccBeginBlockDirective>(x.t)};
const auto &blockDir{std::get<parser::AccBlockDirective>(beginBlockDir.t)};
const parser::Block &block{std::get<parser::Block>(x.t)};
switch (blockDir.v) {
case llvm::acc::Directive::ACCD_kernels:
case llvm::acc::Directive::ACCD_parallel:
case llvm::acc::Directive::ACCD_serial:
// Restriction - line 1004-1005
CheckOnlyAllowedAfter(llvm::acc::Clause::ACCC_device_type,
computeConstructOnlyAllowedAfterDeviceTypeClauses);
// Restriction - line 1001
CheckNoBranching(block, GetContext().directive, blockDir.source);
break;
case llvm::acc::Directive::ACCD_data:
// Restriction - line 1249-1250
CheckRequireAtLeastOneOf();
break;
case llvm::acc::Directive::ACCD_host_data:
// Restriction - line 1746
CheckRequireAtLeastOneOf();
break;
default:
break;
}
dirContext_.pop_back();
}
void AccStructureChecker::Enter(
const parser::OpenACCStandaloneDeclarativeConstruct &x) {
const auto &declarativeDir{std::get<parser::AccDeclarativeDirective>(x.t)};
PushContextAndClauseSets(declarativeDir.source, declarativeDir.v);
}
void AccStructureChecker::Leave(
const parser::OpenACCStandaloneDeclarativeConstruct &x) {
// Restriction - line 2409
CheckAtLeastOneClause();
// Restriction - line 2417-2418 - In a Fortran module declaration section,
// only create, copyin, device_resident, and link clauses are allowed.
const auto &declarativeDir{std::get<parser::AccDeclarativeDirective>(x.t)};
const auto &scope{context_.FindScope(declarativeDir.source)};
const Scope &containingScope{GetProgramUnitContaining(scope)};
if (containingScope.kind() == Scope::Kind::Module) {
for (auto cl : GetContext().actualClauses) {
if (cl != llvm::acc::Clause::ACCC_create &&
cl != llvm::acc::Clause::ACCC_copyin &&
cl != llvm::acc::Clause::ACCC_device_resident &&
cl != llvm::acc::Clause::ACCC_link) {
context_.Say(GetContext().directiveSource,
"%s clause is not allowed on the %s directive in module "
"declaration "
"section"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCClauseName(cl).str()),
ContextDirectiveAsFortran());
}
}
}
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCCombinedConstruct &x) {
const auto &beginCombinedDir{
std::get<parser::AccBeginCombinedDirective>(x.t)};
const auto &combinedDir{
std::get<parser::AccCombinedDirective>(beginCombinedDir.t)};
// check matching, End directive is optional
if (const auto &endCombinedDir{
std::get<std::optional<parser::AccEndCombinedDirective>>(x.t)}) {
CheckMatching<parser::AccCombinedDirective>(combinedDir, endCombinedDir->v);
}
PushContextAndClauseSets(combinedDir.source, combinedDir.v);
}
void AccStructureChecker::Leave(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:
// Restriction - line 1004-1005
CheckOnlyAllowedAfter(llvm::acc::Clause::ACCC_device_type,
computeConstructOnlyAllowedAfterDeviceTypeClauses);
break;
default:
break;
}
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCLoopConstruct &x) {
const auto &beginDir{std::get<parser::AccBeginLoopDirective>(x.t)};
const auto &loopDir{std::get<parser::AccLoopDirective>(beginDir.t)};
PushContextAndClauseSets(loopDir.source, loopDir.v);
}
void AccStructureChecker::Leave(const parser::OpenACCLoopConstruct &x) {
const auto &beginDir{std::get<parser::AccBeginLoopDirective>(x.t)};
const auto &loopDir{std::get<parser::AccLoopDirective>(beginDir.t)};
if (loopDir.v == llvm::acc::Directive::ACCD_loop) {
// Restriction - line 1818-1819
CheckOnlyAllowedAfter(llvm::acc::Clause::ACCC_device_type,
loopOnlyAllowedAfterDeviceTypeClauses);
// Restriction - line 1834
CheckNotAllowedIfClause(llvm::acc::Clause::ACCC_seq,
{llvm::acc::Clause::ACCC_gang, llvm::acc::Clause::ACCC_vector,
llvm::acc::Clause::ACCC_worker});
}
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCStandaloneConstruct &x) {
const auto &standaloneDir{std::get<parser::AccStandaloneDirective>(x.t)};
PushContextAndClauseSets(standaloneDir.source, standaloneDir.v);
}
void AccStructureChecker::Leave(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:
// Restriction - line 1310-1311 (ENTER DATA)
// Restriction - line 1312-1313 (EXIT DATA)
CheckRequireAtLeastOneOf();
break;
case llvm::acc::Directive::ACCD_set:
// Restriction - line 2610
CheckRequireAtLeastOneOf();
// Restriction - line 2602
CheckNotInComputeConstruct();
break;
case llvm::acc::Directive::ACCD_update:
// Restriction - line 2636
CheckRequireAtLeastOneOf();
// Restriction - line 2669
CheckOnlyAllowedAfter(llvm::acc::Clause::ACCC_device_type,
updateOnlyAllowedAfterDeviceTypeClauses);
break;
case llvm::acc::Directive::ACCD_init:
case llvm::acc::Directive::ACCD_shutdown:
// Restriction - line 2525 (INIT)
// Restriction - line 2561 (SHUTDOWN)
CheckNotInComputeConstruct();
break;
default:
break;
}
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCRoutineConstruct &x) {
PushContextAndClauseSets(x.source, llvm::acc::Directive::ACCD_routine);
const auto &optName{std::get<std::optional<parser::Name>>(x.t)};
if (!optName) {
const auto &verbatim{std::get<parser::Verbatim>(x.t)};
const auto &scope{context_.FindScope(verbatim.source)};
const Scope &containingScope{GetProgramUnitContaining(scope)};
if (containingScope.kind() == Scope::Kind::Module) {
context_.Say(GetContext().directiveSource,
"ROUTINE directive without name must appear within the specification "
"part of a subroutine or function definition, or within an interface "
"body for a subroutine or function in an interface block"_err_en_US);
}
}
}
void AccStructureChecker::Leave(const parser::OpenACCRoutineConstruct &) {
// Restriction - line 2790
CheckRequireAtLeastOneOf();
// Restriction - line 2788-2789
CheckOnlyAllowedAfter(llvm::acc::Clause::ACCC_device_type,
routineOnlyAllowedAfterDeviceTypeClauses);
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCWaitConstruct &x) {
const auto &verbatim{std::get<parser::Verbatim>(x.t)};
PushContextAndClauseSets(verbatim.source, llvm::acc::Directive::ACCD_wait);
}
void AccStructureChecker::Leave(const parser::OpenACCWaitConstruct &x) {
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCAtomicConstruct &x) {
PushContextAndClauseSets(x.source, llvm::acc::Directive::ACCD_atomic);
}
void AccStructureChecker::Leave(const parser::OpenACCAtomicConstruct &x) {
dirContext_.pop_back();
}
void AccStructureChecker::Enter(const parser::OpenACCCacheConstruct &x) {
const auto &verbatim = std::get<parser::Verbatim>(x.t);
PushContextAndClauseSets(verbatim.source, llvm::acc::Directive::ACCD_cache);
SetContextDirectiveSource(verbatim.source);
}
void AccStructureChecker::Leave(const parser::OpenACCCacheConstruct &x) {
dirContext_.pop_back();
}
// Clause checkers
CHECK_REQ_SCALAR_INT_CONSTANT_CLAUSE(Collapse, ACCC_collapse)
CHECK_SIMPLE_CLAUSE(Auto, ACCC_auto)
CHECK_SIMPLE_CLAUSE(Async, ACCC_async)
CHECK_SIMPLE_CLAUSE(Attach, ACCC_attach)
CHECK_SIMPLE_CLAUSE(Bind, ACCC_bind)
CHECK_SIMPLE_CLAUSE(Capture, ACCC_capture)
CHECK_SIMPLE_CLAUSE(Copy, ACCC_copy)
CHECK_SIMPLE_CLAUSE(Default, ACCC_default)
CHECK_SIMPLE_CLAUSE(DefaultAsync, ACCC_default_async)
CHECK_SIMPLE_CLAUSE(Delete, ACCC_delete)
CHECK_SIMPLE_CLAUSE(Detach, ACCC_detach)
CHECK_SIMPLE_CLAUSE(Device, ACCC_device)
CHECK_SIMPLE_CLAUSE(DeviceNum, ACCC_device_num)
CHECK_SIMPLE_CLAUSE(Deviceptr, ACCC_deviceptr)
CHECK_SIMPLE_CLAUSE(DeviceResident, ACCC_device_resident)
CHECK_SIMPLE_CLAUSE(DeviceType, ACCC_device_type)
CHECK_SIMPLE_CLAUSE(Finalize, ACCC_finalize)
CHECK_SIMPLE_CLAUSE(Firstprivate, ACCC_firstprivate)
CHECK_SIMPLE_CLAUSE(Gang, ACCC_gang)
CHECK_SIMPLE_CLAUSE(Host, ACCC_host)
CHECK_SIMPLE_CLAUSE(If, ACCC_if)
CHECK_SIMPLE_CLAUSE(IfPresent, ACCC_if_present)
CHECK_SIMPLE_CLAUSE(Independent, ACCC_independent)
CHECK_SIMPLE_CLAUSE(Link, ACCC_link)
CHECK_SIMPLE_CLAUSE(NoCreate, ACCC_no_create)
CHECK_SIMPLE_CLAUSE(Nohost, ACCC_nohost)
CHECK_SIMPLE_CLAUSE(NumGangs, ACCC_num_gangs)
CHECK_SIMPLE_CLAUSE(NumWorkers, ACCC_num_workers)
CHECK_SIMPLE_CLAUSE(Present, ACCC_present)
CHECK_SIMPLE_CLAUSE(Private, ACCC_private)
CHECK_SIMPLE_CLAUSE(Read, ACCC_read)
CHECK_SIMPLE_CLAUSE(Reduction, ACCC_reduction)
CHECK_SIMPLE_CLAUSE(Seq, ACCC_seq)
CHECK_SIMPLE_CLAUSE(Tile, ACCC_tile)
CHECK_SIMPLE_CLAUSE(UseDevice, ACCC_use_device)
CHECK_SIMPLE_CLAUSE(Vector, ACCC_vector)
CHECK_SIMPLE_CLAUSE(VectorLength, ACCC_vector_length)
CHECK_SIMPLE_CLAUSE(Wait, ACCC_wait)
CHECK_SIMPLE_CLAUSE(Worker, ACCC_worker)
CHECK_SIMPLE_CLAUSE(Write, ACCC_write)
CHECK_SIMPLE_CLAUSE(Unknown, ACCC_unknown)
void AccStructureChecker::Enter(const parser::AccClause::Create &c) {
CheckAllowed(llvm::acc::Clause::ACCC_create);
const auto &modifierClause{c.v};
if (const auto &modifier{
std::get<std::optional<parser::AccDataModifier>>(modifierClause.t)}) {
if (modifier->v != parser::AccDataModifier::Modifier::Zero) {
context_.Say(GetContext().clauseSource,
"Only the ZERO modifier is allowed for the %s clause "
"on the %s directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCClauseName(llvm::acc::Clause::ACCC_create)
.str()),
ContextDirectiveAsFortran());
}
}
}
void AccStructureChecker::Enter(const parser::AccClause::Copyin &c) {
CheckAllowed(llvm::acc::Clause::ACCC_copyin);
const auto &modifierClause{c.v};
if (const auto &modifier{
std::get<std::optional<parser::AccDataModifier>>(modifierClause.t)}) {
if (CheckAllowedModifier(llvm::acc::Clause::ACCC_copyin)) {
return;
}
if (modifier->v != parser::AccDataModifier::Modifier::ReadOnly) {
context_.Say(GetContext().clauseSource,
"Only the READONLY modifier is allowed for the %s clause "
"on the %s directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCClauseName(llvm::acc::Clause::ACCC_copyin)
.str()),
ContextDirectiveAsFortran());
}
}
}
void AccStructureChecker::Enter(const parser::AccClause::Copyout &c) {
CheckAllowed(llvm::acc::Clause::ACCC_copyout);
const auto &modifierClause{c.v};
if (const auto &modifier{
std::get<std::optional<parser::AccDataModifier>>(modifierClause.t)}) {
if (CheckAllowedModifier(llvm::acc::Clause::ACCC_copyout)) {
return;
}
if (modifier->v != parser::AccDataModifier::Modifier::Zero) {
context_.Say(GetContext().clauseSource,
"Only the ZERO modifier is allowed for the %s clause "
"on the %s directive"_err_en_US,
parser::ToUpperCaseLetters(
llvm::acc::getOpenACCClauseName(llvm::acc::Clause::ACCC_copyout)
.str()),
ContextDirectiveAsFortran());
}
}
}
void AccStructureChecker::Enter(const parser::AccClause::Self &x) {
CheckAllowed(llvm::acc::Clause::ACCC_self);
const parser::AccSelfClause &accSelfClause = x.v;
if (GetContext().directive == llvm::acc::Directive::ACCD_update &&
std::holds_alternative<std::optional<parser::ScalarLogicalExpr>>(
accSelfClause.u)) {
context_.Say(GetContext().clauseSource,
"SELF clause on the %s directive must have a var-list"_err_en_US,
ContextDirectiveAsFortran());
} else if (GetContext().directive != llvm::acc::Directive::ACCD_update &&
std::holds_alternative<parser::AccObjectList>(accSelfClause.u)) {
const auto &accObjectList =
std::get<parser::AccObjectList>(accSelfClause.u);
if (accObjectList.v.size() != 1) {
context_.Say(GetContext().clauseSource,
"SELF clause on the %s directive only accepts optional scalar logical"
" expression"_err_en_US,
ContextDirectiveAsFortran());
}
}
}
llvm::StringRef AccStructureChecker::getClauseName(llvm::acc::Clause clause) {
return llvm::acc::getOpenACCClauseName(clause);
}
llvm::StringRef AccStructureChecker::getDirectiveName(
llvm::acc::Directive directive) {
return llvm::acc::getOpenACCDirectiveName(directive);
}
} // namespace Fortran::semantics