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mod-file.cpp
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//===-- lib/Semantics/mod-file.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 "mod-file.h"
#include "resolve-names.h"
#include "flang/Common/restorer.h"
#include "flang/Evaluate/tools.h"
#include "flang/Parser/message.h"
#include "flang/Parser/parsing.h"
#include "flang/Parser/unparse.h"
#include "flang/Semantics/scope.h"
#include "flang/Semantics/semantics.h"
#include "flang/Semantics/symbol.h"
#include "flang/Semantics/tools.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <fstream>
#include <set>
#include <string_view>
#include <vector>
namespace Fortran::semantics {
using namespace parser::literals;
// The first line of a file that identifies it as a .mod file.
// The first three bytes are a Unicode byte order mark that ensures
// that the module file is decoded as UTF-8 even if source files
// are using another encoding.
struct ModHeader {
static constexpr const char bom[3 + 1]{"\xef\xbb\xbf"};
static constexpr int magicLen{13};
static constexpr int sumLen{16};
static constexpr const char magic[magicLen + 1]{"!mod$ v1 sum:"};
static constexpr char terminator{'\n'};
static constexpr int len{magicLen + 1 + sumLen};
static constexpr int needLen{7};
static constexpr const char need[needLen + 1]{"!need$ "};
};
static std::optional<SourceName> GetSubmoduleParent(const parser::Program &);
static void CollectSymbols(
const Scope &, SymbolVector &, SymbolVector &, SourceOrderedSymbolSet &);
static void PutPassName(llvm::raw_ostream &, const std::optional<SourceName> &);
static void PutInit(llvm::raw_ostream &, const Symbol &, const MaybeExpr &,
const parser::Expr *);
static void PutInit(llvm::raw_ostream &, const MaybeIntExpr &);
static void PutBound(llvm::raw_ostream &, const Bound &);
static void PutShapeSpec(llvm::raw_ostream &, const ShapeSpec &);
static void PutShape(
llvm::raw_ostream &, const ArraySpec &, char open, char close);
static llvm::raw_ostream &PutAttr(llvm::raw_ostream &, Attr);
static llvm::raw_ostream &PutType(llvm::raw_ostream &, const DeclTypeSpec &);
static llvm::raw_ostream &PutLower(llvm::raw_ostream &, std::string_view);
static std::error_code WriteFile(const std::string &, const std::string &,
ModuleCheckSumType &, bool debug = true);
static bool FileContentsMatch(
const std::string &, const std::string &, const std::string &);
static ModuleCheckSumType ComputeCheckSum(const std::string_view &);
static std::string CheckSumString(ModuleCheckSumType);
// Collect symbols needed for a subprogram interface
class SubprogramSymbolCollector {
public:
SubprogramSymbolCollector(const Symbol &symbol, const Scope &scope)
: symbol_{symbol}, scope_{scope} {}
const SymbolVector &symbols() const { return need_; }
const std::set<SourceName> &imports() const { return imports_; }
void Collect();
private:
const Symbol &symbol_;
const Scope &scope_;
bool isInterface_{false};
SymbolVector need_; // symbols that are needed
UnorderedSymbolSet needSet_; // symbols already in need_
UnorderedSymbolSet useSet_; // use-associations that might be needed
std::set<SourceName> imports_; // imports from host that are needed
void DoSymbol(const Symbol &);
void DoSymbol(const SourceName &, const Symbol &);
void DoType(const DeclTypeSpec *);
void DoBound(const Bound &);
void DoParamValue(const ParamValue &);
bool NeedImport(const SourceName &, const Symbol &);
template <typename T> void DoExpr(evaluate::Expr<T> expr) {
for (const Symbol &symbol : evaluate::CollectSymbols(expr)) {
DoSymbol(symbol);
}
}
};
bool ModFileWriter::WriteAll() {
// this flag affects character literals: force it to be consistent
auto restorer{
common::ScopedSet(parser::useHexadecimalEscapeSequences, false)};
WriteAll(context_.globalScope());
return !context_.AnyFatalError();
}
void ModFileWriter::WriteAll(const Scope &scope) {
for (const auto &child : scope.children()) {
WriteOne(child);
}
}
void ModFileWriter::WriteOne(const Scope &scope) {
if (scope.kind() == Scope::Kind::Module) {
auto *symbol{scope.symbol()};
if (!symbol->test(Symbol::Flag::ModFile)) {
Write(*symbol);
}
WriteAll(scope); // write out submodules
}
}
// Construct the name of a module file. Non-empty ancestorName means submodule.
static std::string ModFileName(const SourceName &name,
const std::string &ancestorName, const std::string &suffix) {
std::string result{name.ToString() + suffix};
return ancestorName.empty() ? result : ancestorName + '-' + result;
}
// Write the module file for symbol, which must be a module or submodule.
void ModFileWriter::Write(const Symbol &symbol) {
const auto &module{symbol.get<ModuleDetails>()};
if (module.moduleFileHash()) {
return; // already written
}
const auto *ancestor{module.ancestor()};
isSubmodule_ = ancestor != nullptr;
auto ancestorName{ancestor ? ancestor->GetName().value().ToString() : ""s};
std::string path{context_.moduleDirectory() + '/' +
ModFileName(symbol.name(), ancestorName, context_.moduleFileSuffix())};
UnorderedSymbolSet hermeticModules;
hermeticModules.insert(symbol);
UnorderedSymbolSet additionalModules;
PutSymbols(DEREF(symbol.scope()),
hermeticModuleFileOutput_ ? &additionalModules : nullptr);
auto asStr{GetAsString(symbol)};
while (!additionalModules.empty()) {
for (auto ref : UnorderedSymbolSet{std::move(additionalModules)}) {
if (hermeticModules.insert(*ref).second &&
!ref->owner().IsIntrinsicModules()) {
PutSymbols(DEREF(ref->scope()), &additionalModules);
asStr += GetAsString(*ref);
}
}
}
ModuleCheckSumType checkSum;
if (std::error_code error{
WriteFile(path, asStr, checkSum, context_.debugModuleWriter())}) {
context_.Say(
symbol.name(), "Error writing %s: %s"_err_en_US, path, error.message());
}
const_cast<ModuleDetails &>(module).set_moduleFileHash(checkSum);
}
void ModFileWriter::WriteClosure(llvm::raw_ostream &out, const Symbol &symbol,
UnorderedSymbolSet &nonIntrinsicModulesWritten) {
if (!symbol.has<ModuleDetails>() || symbol.owner().IsIntrinsicModules() ||
!nonIntrinsicModulesWritten.insert(symbol).second) {
return;
}
PutSymbols(DEREF(symbol.scope()), /*hermeticModules=*/nullptr);
needsBuf_.clear(); // omit module checksums
auto str{GetAsString(symbol)};
for (auto depRef : std::move(usedNonIntrinsicModules_)) {
WriteClosure(out, *depRef, nonIntrinsicModulesWritten);
}
out << std::move(str);
}
// Return the entire body of the module file
// and clear saved uses, decls, and contains.
std::string ModFileWriter::GetAsString(const Symbol &symbol) {
std::string buf;
llvm::raw_string_ostream all{buf};
all << needs_.str();
needs_.str().clear();
auto &details{symbol.get<ModuleDetails>()};
if (!details.isSubmodule()) {
all << "module " << symbol.name();
} else {
auto *parent{details.parent()->symbol()};
auto *ancestor{details.ancestor()->symbol()};
all << "submodule(" << ancestor->name();
if (parent != ancestor) {
all << ':' << parent->name();
}
all << ") " << symbol.name();
}
all << '\n' << uses_.str();
uses_.str().clear();
all << useExtraAttrs_.str();
useExtraAttrs_.str().clear();
all << decls_.str();
decls_.str().clear();
auto str{contains_.str()};
contains_.str().clear();
if (!str.empty()) {
all << "contains\n" << str;
}
all << "end\n";
return all.str();
}
// Collect symbols from constant and specification expressions that are being
// referenced directly from other modules; they may require new USE
// associations.
static void HarvestSymbolsNeededFromOtherModules(
SourceOrderedSymbolSet &, const Scope &);
static void HarvestSymbolsNeededFromOtherModules(
SourceOrderedSymbolSet &set, const Symbol &symbol, const Scope &scope) {
auto HarvestBound{[&](const Bound &bound) {
if (const auto &expr{bound.GetExplicit()}) {
for (SymbolRef ref : evaluate::CollectSymbols(*expr)) {
set.emplace(*ref);
}
}
}};
auto HarvestShapeSpec{[&](const ShapeSpec &shapeSpec) {
HarvestBound(shapeSpec.lbound());
HarvestBound(shapeSpec.ubound());
}};
auto HarvestArraySpec{[&](const ArraySpec &arraySpec) {
for (const auto &shapeSpec : arraySpec) {
HarvestShapeSpec(shapeSpec);
}
}};
if (symbol.has<DerivedTypeDetails>()) {
if (symbol.scope()) {
HarvestSymbolsNeededFromOtherModules(set, *symbol.scope());
}
} else if (const auto &generic{symbol.detailsIf<GenericDetails>()};
generic && generic->derivedType()) {
const Symbol &dtSym{*generic->derivedType()};
if (dtSym.has<DerivedTypeDetails>()) {
if (dtSym.scope()) {
HarvestSymbolsNeededFromOtherModules(set, *dtSym.scope());
}
} else {
CHECK(dtSym.has<UseDetails>() || dtSym.has<UseErrorDetails>());
}
} else if (const auto *object{symbol.detailsIf<ObjectEntityDetails>()}) {
HarvestArraySpec(object->shape());
HarvestArraySpec(object->coshape());
if (IsNamedConstant(symbol) || scope.IsDerivedType()) {
if (object->init()) {
for (SymbolRef ref : evaluate::CollectSymbols(*object->init())) {
set.emplace(*ref);
}
}
}
} else if (const auto *proc{symbol.detailsIf<ProcEntityDetails>()}) {
if (proc->init() && *proc->init() && scope.IsDerivedType()) {
set.emplace(**proc->init());
}
} else if (const auto *subp{symbol.detailsIf<SubprogramDetails>()}) {
for (const Symbol *dummy : subp->dummyArgs()) {
if (dummy) {
HarvestSymbolsNeededFromOtherModules(set, *dummy, scope);
}
}
if (subp->isFunction()) {
HarvestSymbolsNeededFromOtherModules(set, subp->result(), scope);
}
}
}
static void HarvestSymbolsNeededFromOtherModules(
SourceOrderedSymbolSet &set, const Scope &scope) {
for (const auto &[_, symbol] : scope) {
HarvestSymbolsNeededFromOtherModules(set, *symbol, scope);
}
}
void ModFileWriter::PrepareRenamings(const Scope &scope) {
// Identify use-associated symbols already in scope under some name
std::map<const Symbol *, const Symbol *> useMap;
for (const auto &[name, symbolRef] : scope) {
const Symbol *symbol{&*symbolRef};
while (const auto *hostAssoc{symbol->detailsIf<HostAssocDetails>()}) {
symbol = &hostAssoc->symbol();
}
if (const auto *use{symbol->detailsIf<UseDetails>()}) {
useMap.emplace(&use->symbol(), symbol);
}
}
// Collect symbols needed from other modules
SourceOrderedSymbolSet symbolsNeeded;
HarvestSymbolsNeededFromOtherModules(symbolsNeeded, scope);
// Establish any necessary renamings of symbols in other modules
// to their names in this scope, creating those new names when needed.
auto &renamings{context_.moduleFileOutputRenamings()};
for (SymbolRef s : symbolsNeeded) {
if (s->owner().kind() != Scope::Kind::Module) {
// Not a USE'able name from a module's top scope;
// component, binding, dummy argument, &c.
continue;
}
const Scope *sMod{FindModuleContaining(s->owner())};
if (!sMod || sMod == &scope) {
continue;
}
if (auto iter{useMap.find(&*s)}; iter != useMap.end()) {
renamings.emplace(&*s, iter->second->name());
continue;
}
SourceName rename{s->name()};
if (const Symbol * found{scope.FindSymbol(s->name())}) {
if (found == &*s) {
continue; // available in scope
}
if (const auto *generic{found->detailsIf<GenericDetails>()}) {
if (generic->derivedType() == &*s || generic->specific() == &*s) {
continue;
}
} else if (found->has<UseDetails>()) {
if (&found->GetUltimate() == &*s) {
continue; // already use-associated with same name
}
}
if (&s->owner() != &found->owner()) { // Symbol needs renaming
rename = scope.context().SaveTempName(
DEREF(sMod->symbol()).name().ToString() + "$" +
s->name().ToString());
}
}
// Symbol is used in this scope but not visible under its name
if (sMod->parent().IsIntrinsicModules()) {
uses_ << "use,intrinsic::";
} else {
uses_ << "use ";
}
uses_ << DEREF(sMod->symbol()).name() << ",only:";
if (rename != s->name()) {
uses_ << rename << "=>";
renamings.emplace(&s->GetUltimate(), rename);
}
uses_ << s->name() << '\n';
useExtraAttrs_ << "private::" << rename << '\n';
}
}
// Put out the visible symbols from scope.
void ModFileWriter::PutSymbols(
const Scope &scope, UnorderedSymbolSet *hermeticModules) {
SymbolVector sorted;
SymbolVector uses;
auto &renamings{context_.moduleFileOutputRenamings()};
auto previousRenamings{std::move(renamings)};
PrepareRenamings(scope);
SourceOrderedSymbolSet modules;
CollectSymbols(scope, sorted, uses, modules);
// Write module files for dependencies first so that their
// hashes are known.
for (auto ref : modules) {
if (hermeticModules) {
hermeticModules->insert(*ref);
} else {
Write(*ref);
needs_ << ModHeader::need
<< CheckSumString(
ref->get<ModuleDetails>().moduleFileHash().value())
<< (ref->owner().IsIntrinsicModules() ? " i " : " n ")
<< ref->name().ToString() << '\n';
}
}
std::string buf; // stuff after CONTAINS in derived type
llvm::raw_string_ostream typeBindings{buf};
for (const Symbol &symbol : sorted) {
if (!symbol.test(Symbol::Flag::CompilerCreated)) {
PutSymbol(typeBindings, symbol);
}
}
for (const Symbol &symbol : uses) {
PutUse(symbol);
}
for (const auto &set : scope.equivalenceSets()) {
if (!set.empty() &&
!set.front().symbol.test(Symbol::Flag::CompilerCreated)) {
char punctuation{'('};
decls_ << "equivalence";
for (const auto &object : set) {
decls_ << punctuation << object.AsFortran();
punctuation = ',';
}
decls_ << ")\n";
}
}
CHECK(typeBindings.str().empty());
renamings = std::move(previousRenamings);
}
// Emit components in order
bool ModFileWriter::PutComponents(const Symbol &typeSymbol) {
const auto &scope{DEREF(typeSymbol.scope())};
std::string buf; // stuff after CONTAINS in derived type
llvm::raw_string_ostream typeBindings{buf};
UnorderedSymbolSet emitted;
SymbolVector symbols{scope.GetSymbols()};
// Emit type parameter declarations first, in order
const auto &details{typeSymbol.get<DerivedTypeDetails>()};
for (const Symbol &symbol : details.paramDeclOrder()) {
CHECK(symbol.has<TypeParamDetails>());
PutSymbol(typeBindings, symbol);
emitted.emplace(symbol);
}
// Emit actual components in component order.
for (SourceName name : details.componentNames()) {
auto iter{scope.find(name)};
if (iter != scope.end()) {
const Symbol &component{*iter->second};
if (!component.test(Symbol::Flag::ParentComp)) {
PutSymbol(typeBindings, component);
}
emitted.emplace(component);
}
}
// Emit remaining symbols from the type's scope
for (const Symbol &symbol : symbols) {
if (emitted.find(symbol) == emitted.end()) {
PutSymbol(typeBindings, symbol);
}
}
if (auto str{typeBindings.str()}; !str.empty()) {
CHECK(scope.IsDerivedType());
decls_ << "contains\n" << str;
return true;
} else {
return false;
}
}
// Return the symbol's attributes that should be written
// into the mod file.
static Attrs getSymbolAttrsToWrite(const Symbol &symbol) {
// Is SAVE attribute is implicit, it should be omitted
// to not violate F202x C862 for a common block member.
return symbol.attrs() & ~(symbol.implicitAttrs() & Attrs{Attr::SAVE});
}
static llvm::raw_ostream &PutGenericName(
llvm::raw_ostream &os, const Symbol &symbol) {
if (IsGenericDefinedOp(symbol)) {
return os << "operator(" << symbol.name() << ')';
} else {
return os << symbol.name();
}
}
// Emit a symbol to decls_, except for bindings in a derived type (type-bound
// procedures, type-bound generics, final procedures) which go to typeBindings.
void ModFileWriter::PutSymbol(
llvm::raw_ostream &typeBindings, const Symbol &symbol) {
common::visit(
common::visitors{
[&](const ModuleDetails &) { /* should be current module */ },
[&](const DerivedTypeDetails &) { PutDerivedType(symbol); },
[&](const SubprogramDetails &) { PutSubprogram(symbol); },
[&](const GenericDetails &x) {
if (symbol.owner().IsDerivedType()) {
// generic binding
for (const Symbol &proc : x.specificProcs()) {
PutGenericName(typeBindings << "generic::", symbol)
<< "=>" << proc.name() << '\n';
}
} else {
PutGeneric(symbol);
}
},
[&](const UseDetails &) { PutUse(symbol); },
[](const UseErrorDetails &) {},
[&](const ProcBindingDetails &x) {
bool deferred{symbol.attrs().test(Attr::DEFERRED)};
typeBindings << "procedure";
if (deferred) {
typeBindings << '(' << x.symbol().name() << ')';
}
PutPassName(typeBindings, x.passName());
auto attrs{symbol.attrs()};
if (x.passName()) {
attrs.reset(Attr::PASS);
}
PutAttrs(typeBindings, attrs);
typeBindings << "::" << symbol.name();
if (!deferred && x.symbol().name() != symbol.name()) {
typeBindings << "=>" << x.symbol().name();
}
typeBindings << '\n';
},
[&](const NamelistDetails &x) {
decls_ << "namelist/" << symbol.name();
char sep{'/'};
for (const Symbol &object : x.objects()) {
decls_ << sep << object.name();
sep = ',';
}
decls_ << '\n';
if (!isSubmodule_ && symbol.attrs().test(Attr::PRIVATE)) {
decls_ << "private::" << symbol.name() << '\n';
}
},
[&](const CommonBlockDetails &x) {
decls_ << "common/" << symbol.name();
char sep = '/';
for (const auto &object : x.objects()) {
decls_ << sep << object->name();
sep = ',';
}
decls_ << '\n';
if (symbol.attrs().test(Attr::BIND_C)) {
PutAttrs(decls_, getSymbolAttrsToWrite(symbol), x.bindName(),
x.isExplicitBindName(), ""s);
decls_ << "::/" << symbol.name() << "/\n";
}
},
[](const HostAssocDetails &) {},
[](const MiscDetails &) {},
[&](const auto &) {
PutEntity(decls_, symbol);
PutDirective(decls_, symbol);
},
},
symbol.details());
}
void ModFileWriter::PutDerivedType(
const Symbol &typeSymbol, const Scope *scope) {
auto &details{typeSymbol.get<DerivedTypeDetails>()};
if (details.isDECStructure()) {
PutDECStructure(typeSymbol, scope);
return;
}
PutAttrs(decls_ << "type", typeSymbol.attrs());
if (const DerivedTypeSpec * extends{typeSymbol.GetParentTypeSpec()}) {
decls_ << ",extends(" << extends->name() << ')';
}
decls_ << "::" << typeSymbol.name();
if (!details.paramNameOrder().empty()) {
char sep{'('};
for (const SymbolRef &ref : details.paramNameOrder()) {
decls_ << sep << ref->name();
sep = ',';
}
decls_ << ')';
}
decls_ << '\n';
if (details.sequence()) {
decls_ << "sequence\n";
}
bool contains{PutComponents(typeSymbol)};
if (!details.finals().empty()) {
const char *sep{contains ? "final::" : "contains\nfinal::"};
for (const auto &pair : details.finals()) {
decls_ << sep << pair.second->name();
sep = ",";
}
if (*sep == ',') {
decls_ << '\n';
}
}
decls_ << "end type\n";
}
void ModFileWriter::PutDECStructure(
const Symbol &typeSymbol, const Scope *scope) {
if (emittedDECStructures_.find(typeSymbol) != emittedDECStructures_.end()) {
return;
}
if (!scope && context_.IsTempName(typeSymbol.name().ToString())) {
return; // defer until used
}
emittedDECStructures_.insert(typeSymbol);
decls_ << "structure ";
if (!context_.IsTempName(typeSymbol.name().ToString())) {
decls_ << typeSymbol.name();
}
if (scope && scope->kind() == Scope::Kind::DerivedType) {
// Nested STRUCTURE: emit entity declarations right now
// on the STRUCTURE statement.
bool any{false};
for (const auto &ref : scope->GetSymbols()) {
const auto *object{ref->detailsIf<ObjectEntityDetails>()};
if (object && object->type() &&
object->type()->category() == DeclTypeSpec::TypeDerived &&
&object->type()->derivedTypeSpec().typeSymbol() == &typeSymbol) {
if (any) {
decls_ << ',';
} else {
any = true;
}
decls_ << ref->name();
PutShape(decls_, object->shape(), '(', ')');
PutInit(decls_, *ref, object->init(), nullptr);
emittedDECFields_.insert(*ref);
} else if (any) {
break; // any later use of this structure will use RECORD/str/
}
}
}
decls_ << '\n';
PutComponents(typeSymbol);
decls_ << "end structure\n";
}
// Attributes that may be in a subprogram prefix
static const Attrs subprogramPrefixAttrs{Attr::ELEMENTAL, Attr::IMPURE,
Attr::MODULE, Attr::NON_RECURSIVE, Attr::PURE, Attr::RECURSIVE};
static void PutOpenACCDeviceTypeRoutineInfo(
llvm::raw_ostream &os, const OpenACCRoutineDeviceTypeInfo &info) {
if (info.isSeq()) {
os << " seq";
}
if (info.isGang()) {
os << " gang";
if (info.gangDim() > 0) {
os << "(dim: " << info.gangDim() << ")";
}
}
if (info.isVector()) {
os << " vector";
}
if (info.isWorker()) {
os << " worker";
}
if (info.bindName()) {
os << " bind(" << *info.bindName() << ")";
}
}
static void PutOpenACCRoutineInfo(
llvm::raw_ostream &os, const SubprogramDetails &details) {
for (auto info : details.openACCRoutineInfos()) {
os << "!$acc routine";
PutOpenACCDeviceTypeRoutineInfo(os, info);
if (info.isNohost()) {
os << " nohost";
}
for (auto dtype : info.deviceTypeInfos()) {
os << " device_type(";
if (dtype.dType() == common::OpenACCDeviceType::Star) {
os << "*";
} else {
os << parser::ToLowerCaseLetters(common::EnumToString(dtype.dType()));
}
os << ")";
PutOpenACCDeviceTypeRoutineInfo(os, dtype);
}
os << "\n";
}
}
void ModFileWriter::PutSubprogram(const Symbol &symbol) {
auto &details{symbol.get<SubprogramDetails>()};
if (const Symbol * interface{details.moduleInterface()}) {
const Scope *module{FindModuleContaining(interface->owner())};
if (module && module != &symbol.owner()) {
// Interface is in ancestor module
} else {
PutSubprogram(*interface);
}
}
auto attrs{symbol.attrs()};
Attrs bindAttrs{};
if (attrs.test(Attr::BIND_C)) {
// bind(c) is a suffix, not prefix
bindAttrs.set(Attr::BIND_C, true);
attrs.set(Attr::BIND_C, false);
}
bool isAbstract{attrs.test(Attr::ABSTRACT)};
if (isAbstract) {
attrs.set(Attr::ABSTRACT, false);
}
Attrs prefixAttrs{subprogramPrefixAttrs & attrs};
// emit any non-prefix attributes in an attribute statement
attrs &= ~subprogramPrefixAttrs;
std::string ssBuf;
llvm::raw_string_ostream ss{ssBuf};
PutAttrs(ss, attrs);
if (!ss.str().empty()) {
decls_ << ss.str().substr(1) << "::" << symbol.name() << '\n';
}
bool isInterface{details.isInterface()};
llvm::raw_ostream &os{isInterface ? decls_ : contains_};
if (isInterface) {
os << (isAbstract ? "abstract " : "") << "interface\n";
}
PutAttrs(os, prefixAttrs, nullptr, false, ""s, " "s);
if (auto attrs{details.cudaSubprogramAttrs()}) {
if (*attrs == common::CUDASubprogramAttrs::HostDevice) {
os << "attributes(host,device) ";
} else {
PutLower(os << "attributes(", common::EnumToString(*attrs)) << ") ";
}
if (!details.cudaLaunchBounds().empty()) {
os << "launch_bounds";
char sep{'('};
for (auto x : details.cudaLaunchBounds()) {
os << sep << x;
sep = ',';
}
os << ") ";
}
if (!details.cudaClusterDims().empty()) {
os << "cluster_dims";
char sep{'('};
for (auto x : details.cudaClusterDims()) {
os << sep << x;
sep = ',';
}
os << ") ";
}
}
os << (details.isFunction() ? "function " : "subroutine ");
os << symbol.name() << '(';
int n = 0;
for (const auto &dummy : details.dummyArgs()) {
if (n++ > 0) {
os << ',';
}
if (dummy) {
os << dummy->name();
} else {
os << "*";
}
}
os << ')';
PutAttrs(os, bindAttrs, details.bindName(), details.isExplicitBindName(),
" "s, ""s);
if (details.isFunction()) {
const Symbol &result{details.result()};
if (result.name() != symbol.name()) {
os << " result(" << result.name() << ')';
}
}
os << '\n';
// walk symbols, collect ones needed for interface
const Scope &scope{
details.entryScope() ? *details.entryScope() : DEREF(symbol.scope())};
SubprogramSymbolCollector collector{symbol, scope};
collector.Collect();
std::string typeBindingsBuf;
llvm::raw_string_ostream typeBindings{typeBindingsBuf};
ModFileWriter writer{context_};
for (const Symbol &need : collector.symbols()) {
writer.PutSymbol(typeBindings, need);
}
CHECK(typeBindings.str().empty());
os << writer.uses_.str();
for (const SourceName &import : collector.imports()) {
decls_ << "import::" << import << "\n";
}
os << writer.decls_.str();
PutOpenACCRoutineInfo(os, details);
os << "end\n";
if (isInterface) {
os << "end interface\n";
}
}
static bool IsIntrinsicOp(const Symbol &symbol) {
if (const auto *details{symbol.GetUltimate().detailsIf<GenericDetails>()}) {
return details->kind().IsIntrinsicOperator();
} else {
return false;
}
}
void ModFileWriter::PutGeneric(const Symbol &symbol) {
const auto &genericOwner{symbol.owner()};
auto &details{symbol.get<GenericDetails>()};
PutGenericName(decls_ << "interface ", symbol) << '\n';
for (const Symbol &specific : details.specificProcs()) {
if (specific.owner() == genericOwner) {
decls_ << "procedure::" << specific.name() << '\n';
}
}
decls_ << "end interface\n";
if (!isSubmodule_ && symbol.attrs().test(Attr::PRIVATE)) {
PutGenericName(decls_ << "private::", symbol) << '\n';
}
}
void ModFileWriter::PutUse(const Symbol &symbol) {
auto &details{symbol.get<UseDetails>()};
auto &use{details.symbol()};
const Symbol &module{GetUsedModule(details)};
if (use.owner().parent().IsIntrinsicModules()) {
uses_ << "use,intrinsic::";
} else {
uses_ << "use ";
usedNonIntrinsicModules_.insert(module);
}
uses_ << module.name() << ",only:";
PutGenericName(uses_, symbol);
// Can have intrinsic op with different local-name and use-name
// (e.g. `operator(<)` and `operator(.lt.)`) but rename is not allowed
if (!IsIntrinsicOp(symbol) && use.name() != symbol.name()) {
PutGenericName(uses_ << "=>", use);
}
uses_ << '\n';
PutUseExtraAttr(Attr::VOLATILE, symbol, use);
PutUseExtraAttr(Attr::ASYNCHRONOUS, symbol, use);
if (!isSubmodule_ && symbol.attrs().test(Attr::PRIVATE)) {
PutGenericName(useExtraAttrs_ << "private::", symbol) << '\n';
}
}
// We have "USE local => use" in this module. If attr was added locally
// (i.e. on local but not on use), also write it out in the mod file.
void ModFileWriter::PutUseExtraAttr(
Attr attr, const Symbol &local, const Symbol &use) {
if (local.attrs().test(attr) && !use.attrs().test(attr)) {
PutAttr(useExtraAttrs_, attr) << "::";
useExtraAttrs_ << local.name() << '\n';
}
}
// Collect the symbols of this scope sorted by their original order, not name.
// Generics and namelists are exceptions: they are sorted after other symbols.
void CollectSymbols(const Scope &scope, SymbolVector &sorted,
SymbolVector &uses, SourceOrderedSymbolSet &modules) {
SymbolVector namelist, generics;
auto symbols{scope.GetSymbols()};
std::size_t commonSize{scope.commonBlocks().size()};
sorted.reserve(symbols.size() + commonSize);
for (SymbolRef symbol : symbols) {
const auto *generic{symbol->detailsIf<GenericDetails>()};
if (generic) {
uses.insert(uses.end(), generic->uses().begin(), generic->uses().end());
for (auto ref : generic->uses()) {
modules.insert(GetUsedModule(ref->get<UseDetails>()));
}
} else if (const auto *use{symbol->detailsIf<UseDetails>()}) {
modules.insert(GetUsedModule(*use));
}
if (symbol->test(Symbol::Flag::ParentComp)) {
} else if (symbol->has<NamelistDetails>()) {
namelist.push_back(symbol);
} else if (generic) {
if (generic->specific() &&
&generic->specific()->owner() == &symbol->owner()) {
sorted.push_back(*generic->specific());
} else if (generic->derivedType() &&
&generic->derivedType()->owner() == &symbol->owner()) {
sorted.push_back(*generic->derivedType());
}
generics.push_back(symbol);
} else {
sorted.push_back(symbol);
}
}
std::sort(sorted.begin(), sorted.end(), SymbolSourcePositionCompare{});
std::sort(generics.begin(), generics.end(), SymbolSourcePositionCompare{});
sorted.insert(sorted.end(), generics.begin(), generics.end());
sorted.insert(sorted.end(), namelist.begin(), namelist.end());
for (const auto &pair : scope.commonBlocks()) {
sorted.push_back(*pair.second);
}
std::sort(
sorted.end() - commonSize, sorted.end(), SymbolSourcePositionCompare{});
}
void ModFileWriter::PutEntity(llvm::raw_ostream &os, const Symbol &symbol) {
common::visit(
common::visitors{
[&](const ObjectEntityDetails &) { PutObjectEntity(os, symbol); },
[&](const ProcEntityDetails &) { PutProcEntity(os, symbol); },
[&](const TypeParamDetails &) { PutTypeParam(os, symbol); },
[&](const auto &) {
common::die("PutEntity: unexpected details: %s",
DetailsToString(symbol.details()).c_str());
},
},
symbol.details());
}
void PutShapeSpec(llvm::raw_ostream &os, const ShapeSpec &x) {
if (x.lbound().isStar()) {
CHECK(x.ubound().isStar());
os << ".."; // assumed rank
} else {
if (!x.lbound().isColon()) {
PutBound(os, x.lbound());
}
os << ':';
if (!x.ubound().isColon()) {
PutBound(os, x.ubound());
}
}
}
void PutShape(
llvm::raw_ostream &os, const ArraySpec &shape, char open, char close) {
if (!shape.empty()) {
os << open;
bool first{true};
for (const auto &shapeSpec : shape) {
if (first) {
first = false;
} else {
os << ',';
}
PutShapeSpec(os, shapeSpec);
}
os << close;
}
}
void ModFileWriter::PutObjectEntity(
llvm::raw_ostream &os, const Symbol &symbol) {
auto &details{symbol.get<ObjectEntityDetails>()};
if (details.type() &&
details.type()->category() == DeclTypeSpec::TypeDerived) {
const Symbol &typeSymbol{details.type()->derivedTypeSpec().typeSymbol()};
if (typeSymbol.get<DerivedTypeDetails>().isDECStructure()) {
PutDerivedType(typeSymbol, &symbol.owner());
if (emittedDECFields_.find(symbol) != emittedDECFields_.end()) {
return; // symbol was emitted on STRUCTURE statement
}
}
}
PutEntity(
os, symbol, [&]() { PutType(os, DEREF(symbol.GetType())); },
getSymbolAttrsToWrite(symbol));
PutShape(os, details.shape(), '(', ')');
PutShape(os, details.coshape(), '[', ']');
PutInit(os, symbol, details.init(), details.unanalyzedPDTComponentInit());
os << '\n';
if (auto tkr{GetIgnoreTKR(symbol)}; !tkr.empty()) {
os << "!dir$ ignore_tkr(";
tkr.IterateOverMembers([&](common::IgnoreTKR tkr) {
switch (tkr) {
SWITCH_COVERS_ALL_CASES
case common::IgnoreTKR::Type:
os << 't';
break;
case common::IgnoreTKR::Kind:
os << 'k';
break;
case common::IgnoreTKR::Rank:
os << 'r';
break;
case common::IgnoreTKR::Device:
os << 'd';
break;
case common::IgnoreTKR::Managed:
os << 'm';
break;
case common::IgnoreTKR::Contiguous:
os << 'c';
break;
}
});
os << ") " << symbol.name() << '\n';
}
if (auto attr{details.cudaDataAttr()}) {
PutLower(os << "attributes(", common::EnumToString(*attr))
<< ") " << symbol.name() << '\n';
}
if (symbol.test(Fortran::semantics::Symbol::Flag::CrayPointer)) {
for (const auto &[pointee, pointer] : symbol.owner().crayPointers()) {
if (pointer == symbol) {
os << "pointer(" << symbol.name() << "," << pointee << ")\n";
}
}
}
}
void ModFileWriter::PutProcEntity(llvm::raw_ostream &os, const Symbol &symbol) {
if (symbol.attrs().test(Attr::INTRINSIC)) {
os << "intrinsic::" << symbol.name() << '\n';
if (!isSubmodule_ && symbol.attrs().test(Attr::PRIVATE)) {
os << "private::" << symbol.name() << '\n';
}
return;
}
const auto &details{symbol.get<ProcEntityDetails>()};
Attrs attrs{symbol.attrs()};
if (details.passName()) {
attrs.reset(Attr::PASS);