forked from OSchip/llvm-project
1287 lines
46 KiB
C++
1287 lines
46 KiB
C++
//===-- lib/Evaluate/characteristics.cpp ----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "flang/Evaluate/characteristics.h"
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#include "flang/Common/indirection.h"
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#include "flang/Evaluate/check-expression.h"
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#include "flang/Evaluate/fold.h"
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#include "flang/Evaluate/intrinsics.h"
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#include "flang/Evaluate/tools.h"
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#include "flang/Evaluate/type.h"
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#include "flang/Parser/message.h"
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#include "flang/Semantics/scope.h"
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#include "flang/Semantics/symbol.h"
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#include "llvm/Support/raw_ostream.h"
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#include <initializer_list>
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using namespace Fortran::parser::literals;
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namespace Fortran::evaluate::characteristics {
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// Copy attributes from a symbol to dst based on the mapping in pairs.
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template <typename A, typename B>
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static void CopyAttrs(const semantics::Symbol &src, A &dst,
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const std::initializer_list<std::pair<semantics::Attr, B>> &pairs) {
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for (const auto &pair : pairs) {
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if (src.attrs().test(pair.first)) {
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dst.attrs.set(pair.second);
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}
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}
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}
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// Shapes of function results and dummy arguments have to have
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// the same rank, the same deferred dimensions, and the same
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// values for explicit dimensions when constant.
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bool ShapesAreCompatible(const Shape &x, const Shape &y) {
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if (x.size() != y.size()) {
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return false;
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}
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auto yIter{y.begin()};
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for (const auto &xDim : x) {
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const auto &yDim{*yIter++};
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if (xDim) {
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if (!yDim || ToInt64(*xDim) != ToInt64(*yDim)) {
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return false;
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}
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} else if (yDim) {
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return false;
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}
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}
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return true;
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}
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bool TypeAndShape::operator==(const TypeAndShape &that) const {
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return type_ == that.type_ && ShapesAreCompatible(shape_, that.shape_) &&
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attrs_ == that.attrs_ && corank_ == that.corank_;
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}
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TypeAndShape &TypeAndShape::Rewrite(FoldingContext &context) {
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LEN_ = Fold(context, std::move(LEN_));
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shape_ = Fold(context, std::move(shape_));
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return *this;
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}
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std::optional<TypeAndShape> TypeAndShape::Characterize(
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const semantics::Symbol &symbol, FoldingContext &context) {
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const auto &ultimate{symbol.GetUltimate()};
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return common::visit(
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common::visitors{
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[&](const semantics::ProcEntityDetails &proc) {
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const semantics::ProcInterface &interface { proc.interface() };
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if (interface.type()) {
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return Characterize(*interface.type(), context);
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} else if (interface.symbol()) {
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return Characterize(*interface.symbol(), context);
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} else {
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return std::optional<TypeAndShape>{};
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}
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},
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[&](const semantics::AssocEntityDetails &assoc) {
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return Characterize(assoc, context);
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},
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[&](const semantics::ProcBindingDetails &binding) {
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return Characterize(binding.symbol(), context);
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},
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[&](const auto &x) -> std::optional<TypeAndShape> {
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using Ty = std::decay_t<decltype(x)>;
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if constexpr (std::is_same_v<Ty, semantics::EntityDetails> ||
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std::is_same_v<Ty, semantics::ObjectEntityDetails> ||
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std::is_same_v<Ty, semantics::TypeParamDetails>) {
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if (const semantics::DeclTypeSpec * type{ultimate.GetType()}) {
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if (auto dyType{DynamicType::From(*type)}) {
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TypeAndShape result{
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std::move(*dyType), GetShape(context, ultimate)};
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result.AcquireAttrs(ultimate);
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result.AcquireLEN(ultimate);
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return std::move(result.Rewrite(context));
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}
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}
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}
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return std::nullopt;
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},
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},
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// GetUltimate() used here, not ResolveAssociations(), because
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// we need the type/rank of an associate entity from TYPE IS,
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// CLASS IS, or RANK statement.
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ultimate.details());
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}
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std::optional<TypeAndShape> TypeAndShape::Characterize(
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const semantics::AssocEntityDetails &assoc, FoldingContext &context) {
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std::optional<TypeAndShape> result;
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if (auto type{DynamicType::From(assoc.type())}) {
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if (auto rank{assoc.rank()}) {
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if (*rank >= 0 && *rank <= common::maxRank) {
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result = TypeAndShape{std::move(*type), Shape(*rank)};
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}
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} else if (auto shape{GetShape(context, assoc.expr())}) {
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result = TypeAndShape{std::move(*type), std::move(*shape)};
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}
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if (result && type->category() == TypeCategory::Character) {
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if (const auto *chExpr{UnwrapExpr<Expr<SomeCharacter>>(assoc.expr())}) {
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if (auto len{chExpr->LEN()}) {
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result->set_LEN(std::move(*len));
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}
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}
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}
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}
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return Fold(context, std::move(result));
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}
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std::optional<TypeAndShape> TypeAndShape::Characterize(
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const semantics::DeclTypeSpec &spec, FoldingContext &context) {
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if (auto type{DynamicType::From(spec)}) {
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return Fold(context, TypeAndShape{std::move(*type)});
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} else {
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return std::nullopt;
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}
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}
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std::optional<TypeAndShape> TypeAndShape::Characterize(
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const ActualArgument &arg, FoldingContext &context) {
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return Characterize(arg.UnwrapExpr(), context);
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}
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bool TypeAndShape::IsCompatibleWith(parser::ContextualMessages &messages,
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const TypeAndShape &that, const char *thisIs, const char *thatIs,
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bool omitShapeConformanceCheck,
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enum CheckConformanceFlags::Flags flags) const {
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if (!type_.IsTkCompatibleWith(that.type_)) {
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messages.Say(
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"%1$s type '%2$s' is not compatible with %3$s type '%4$s'"_err_en_US,
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thatIs, that.AsFortran(), thisIs, AsFortran());
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return false;
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}
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return omitShapeConformanceCheck ||
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CheckConformance(messages, shape_, that.shape_, flags, thisIs, thatIs)
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.value_or(true /*fail only when nonconformance is known now*/);
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}
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std::optional<Expr<SubscriptInteger>> TypeAndShape::MeasureElementSizeInBytes(
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FoldingContext &foldingContext, bool align) const {
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if (LEN_) {
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CHECK(type_.category() == TypeCategory::Character);
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return Fold(foldingContext,
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Expr<SubscriptInteger>{type_.kind()} * Expr<SubscriptInteger>{*LEN_});
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}
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if (auto elementBytes{type_.MeasureSizeInBytes(foldingContext, align)}) {
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return Fold(foldingContext, std::move(*elementBytes));
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}
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return std::nullopt;
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}
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std::optional<Expr<SubscriptInteger>> TypeAndShape::MeasureSizeInBytes(
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FoldingContext &foldingContext) const {
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if (auto elements{GetSize(Shape{shape_})}) {
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// Sizes of arrays (even with single elements) are multiples of
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// their alignments.
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if (auto elementBytes{
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MeasureElementSizeInBytes(foldingContext, GetRank(shape_) > 0)}) {
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return Fold(
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foldingContext, std::move(*elements) * std::move(*elementBytes));
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}
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}
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return std::nullopt;
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}
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void TypeAndShape::AcquireAttrs(const semantics::Symbol &symbol) {
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if (IsAssumedShape(symbol)) {
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attrs_.set(Attr::AssumedShape);
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}
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if (IsDeferredShape(symbol)) {
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attrs_.set(Attr::DeferredShape);
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}
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if (const auto *object{
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symbol.GetUltimate().detailsIf<semantics::ObjectEntityDetails>()}) {
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corank_ = object->coshape().Rank();
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if (object->IsAssumedRank()) {
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attrs_.set(Attr::AssumedRank);
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}
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if (object->IsAssumedSize()) {
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attrs_.set(Attr::AssumedSize);
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}
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if (object->IsCoarray()) {
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attrs_.set(Attr::Coarray);
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}
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}
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}
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void TypeAndShape::AcquireLEN() {
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if (auto len{type_.GetCharLength()}) {
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LEN_ = std::move(len);
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}
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}
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void TypeAndShape::AcquireLEN(const semantics::Symbol &symbol) {
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if (type_.category() == TypeCategory::Character) {
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if (auto len{DataRef{symbol}.LEN()}) {
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LEN_ = std::move(*len);
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}
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}
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}
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std::string TypeAndShape::AsFortran() const {
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return type_.AsFortran(LEN_ ? LEN_->AsFortran() : "");
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}
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llvm::raw_ostream &TypeAndShape::Dump(llvm::raw_ostream &o) const {
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o << type_.AsFortran(LEN_ ? LEN_->AsFortran() : "");
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attrs_.Dump(o, EnumToString);
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if (!shape_.empty()) {
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o << " dimension";
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char sep{'('};
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for (const auto &expr : shape_) {
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o << sep;
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sep = ',';
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if (expr) {
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expr->AsFortran(o);
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} else {
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o << ':';
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}
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}
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o << ')';
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}
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return o;
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}
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bool DummyDataObject::operator==(const DummyDataObject &that) const {
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return type == that.type && attrs == that.attrs && intent == that.intent &&
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coshape == that.coshape;
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}
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bool DummyDataObject::IsCompatibleWith(const DummyDataObject &actual) const {
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return type.shape() == actual.type.shape() &&
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type.type().IsTkCompatibleWith(actual.type.type()) &&
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attrs == actual.attrs && intent == actual.intent &&
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coshape == actual.coshape;
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}
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static common::Intent GetIntent(const semantics::Attrs &attrs) {
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if (attrs.test(semantics::Attr::INTENT_IN)) {
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return common::Intent::In;
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} else if (attrs.test(semantics::Attr::INTENT_OUT)) {
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return common::Intent::Out;
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} else if (attrs.test(semantics::Attr::INTENT_INOUT)) {
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return common::Intent::InOut;
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} else {
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return common::Intent::Default;
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}
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}
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std::optional<DummyDataObject> DummyDataObject::Characterize(
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const semantics::Symbol &symbol, FoldingContext &context) {
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if (symbol.has<semantics::ObjectEntityDetails>() ||
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symbol.has<semantics::EntityDetails>()) {
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if (auto type{TypeAndShape::Characterize(symbol, context)}) {
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std::optional<DummyDataObject> result{std::move(*type)};
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using semantics::Attr;
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CopyAttrs<DummyDataObject, DummyDataObject::Attr>(symbol, *result,
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{
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{Attr::OPTIONAL, DummyDataObject::Attr::Optional},
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{Attr::ALLOCATABLE, DummyDataObject::Attr::Allocatable},
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{Attr::ASYNCHRONOUS, DummyDataObject::Attr::Asynchronous},
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{Attr::CONTIGUOUS, DummyDataObject::Attr::Contiguous},
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{Attr::VALUE, DummyDataObject::Attr::Value},
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{Attr::VOLATILE, DummyDataObject::Attr::Volatile},
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{Attr::POINTER, DummyDataObject::Attr::Pointer},
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{Attr::TARGET, DummyDataObject::Attr::Target},
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});
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result->intent = GetIntent(symbol.attrs());
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return result;
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}
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}
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return std::nullopt;
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}
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bool DummyDataObject::CanBePassedViaImplicitInterface() const {
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if ((attrs &
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Attrs{Attr::Allocatable, Attr::Asynchronous, Attr::Optional,
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Attr::Pointer, Attr::Target, Attr::Value, Attr::Volatile})
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.any()) {
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return false; // 15.4.2.2(3)(a)
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} else if ((type.attrs() &
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TypeAndShape::Attrs{TypeAndShape::Attr::AssumedShape,
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TypeAndShape::Attr::AssumedRank,
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TypeAndShape::Attr::Coarray})
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.any()) {
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return false; // 15.4.2.2(3)(b-d)
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} else if (type.type().IsPolymorphic()) {
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return false; // 15.4.2.2(3)(f)
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} else if (const auto *derived{GetDerivedTypeSpec(type.type())}) {
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return derived->parameters().empty(); // 15.4.2.2(3)(e)
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} else {
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return true;
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}
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}
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llvm::raw_ostream &DummyDataObject::Dump(llvm::raw_ostream &o) const {
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attrs.Dump(o, EnumToString);
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if (intent != common::Intent::Default) {
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o << "INTENT(" << common::EnumToString(intent) << ')';
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}
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type.Dump(o);
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if (!coshape.empty()) {
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char sep{'['};
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for (const auto &expr : coshape) {
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expr.AsFortran(o << sep);
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sep = ',';
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}
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}
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return o;
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}
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DummyProcedure::DummyProcedure(Procedure &&p)
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: procedure{new Procedure{std::move(p)}} {}
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bool DummyProcedure::operator==(const DummyProcedure &that) const {
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return attrs == that.attrs && intent == that.intent &&
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procedure.value() == that.procedure.value();
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}
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bool DummyProcedure::IsCompatibleWith(const DummyProcedure &actual) const {
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return attrs == actual.attrs && intent == actual.intent &&
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procedure.value().IsCompatibleWith(actual.procedure.value());
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}
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static std::string GetSeenProcs(
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const semantics::UnorderedSymbolSet &seenProcs) {
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// Sort the symbols so that they appear in the same order on all platforms
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auto ordered{semantics::OrderBySourcePosition(seenProcs)};
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std::string result;
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llvm::interleave(
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ordered,
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[&](const SymbolRef p) { result += '\'' + p->name().ToString() + '\''; },
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[&]() { result += ", "; });
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return result;
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}
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// These functions with arguments of type UnorderedSymbolSet are used with
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// mutually recursive calls when characterizing a Procedure, a DummyArgument,
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// or a DummyProcedure to detect circularly defined procedures as required by
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// 15.4.3.6, paragraph 2.
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static std::optional<DummyArgument> CharacterizeDummyArgument(
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const semantics::Symbol &symbol, FoldingContext &context,
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semantics::UnorderedSymbolSet seenProcs);
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static std::optional<FunctionResult> CharacterizeFunctionResult(
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const semantics::Symbol &symbol, FoldingContext &context,
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semantics::UnorderedSymbolSet seenProcs);
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static std::optional<Procedure> CharacterizeProcedure(
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const semantics::Symbol &original, FoldingContext &context,
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semantics::UnorderedSymbolSet seenProcs) {
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Procedure result;
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const auto &symbol{ResolveAssociations(original)};
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if (seenProcs.find(symbol) != seenProcs.end()) {
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std::string procsList{GetSeenProcs(seenProcs)};
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context.messages().Say(symbol.name(),
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"Procedure '%s' is recursively defined. Procedures in the cycle:"
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" %s"_err_en_US,
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symbol.name(), procsList);
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return std::nullopt;
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}
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seenProcs.insert(symbol);
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CopyAttrs<Procedure, Procedure::Attr>(symbol, result,
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{
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{semantics::Attr::ELEMENTAL, Procedure::Attr::Elemental},
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{semantics::Attr::BIND_C, Procedure::Attr::BindC},
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});
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if (IsPureProcedure(symbol) || // works for ENTRY too
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(!symbol.attrs().test(semantics::Attr::IMPURE) &&
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result.attrs.test(Procedure::Attr::Elemental))) {
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result.attrs.set(Procedure::Attr::Pure);
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}
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return common::visit(
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common::visitors{
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[&](const semantics::SubprogramDetails &subp)
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-> std::optional<Procedure> {
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if (subp.isFunction()) {
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if (auto fr{CharacterizeFunctionResult(
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subp.result(), context, seenProcs)}) {
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result.functionResult = std::move(fr);
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} else {
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return std::nullopt;
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}
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} else {
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result.attrs.set(Procedure::Attr::Subroutine);
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}
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for (const semantics::Symbol *arg : subp.dummyArgs()) {
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if (!arg) {
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if (subp.isFunction()) {
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return std::nullopt;
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} else {
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result.dummyArguments.emplace_back(AlternateReturn{});
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}
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} else if (auto argCharacteristics{CharacterizeDummyArgument(
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*arg, context, seenProcs)}) {
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result.dummyArguments.emplace_back(
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std::move(argCharacteristics.value()));
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} else {
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return std::nullopt;
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}
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}
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return result;
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},
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[&](const semantics::ProcEntityDetails &proc)
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-> std::optional<Procedure> {
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if (symbol.attrs().test(semantics::Attr::INTRINSIC)) {
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// Fails when the intrinsic is not a specific intrinsic function
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// from F'2018 table 16.2. In order to handle forward references,
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// attempts to use impermissible intrinsic procedures as the
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// interfaces of procedure pointers are caught and flagged in
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// declaration checking in Semantics.
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auto intrinsic{context.intrinsics().IsSpecificIntrinsicFunction(
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symbol.name().ToString())};
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if (intrinsic && intrinsic->isRestrictedSpecific) {
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intrinsic.reset(); // Exclude intrinsics from table 16.3.
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}
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return intrinsic;
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}
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const semantics::ProcInterface &interface { proc.interface() };
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if (const semantics::Symbol * interfaceSymbol{interface.symbol()}) {
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return CharacterizeProcedure(
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*interfaceSymbol, context, seenProcs);
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} else {
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result.attrs.set(Procedure::Attr::ImplicitInterface);
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const semantics::DeclTypeSpec *type{interface.type()};
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if (symbol.test(semantics::Symbol::Flag::Subroutine)) {
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// ignore any implicit typing
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result.attrs.set(Procedure::Attr::Subroutine);
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} else if (type) {
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if (auto resultType{DynamicType::From(*type)}) {
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result.functionResult = FunctionResult{*resultType};
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} else {
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return std::nullopt;
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}
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} else if (symbol.test(semantics::Symbol::Flag::Function)) {
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return std::nullopt;
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}
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// The PASS name, if any, is not a characteristic.
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return result;
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}
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},
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[&](const semantics::ProcBindingDetails &binding) {
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if (auto result{CharacterizeProcedure(
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binding.symbol(), context, seenProcs)}) {
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if (!symbol.attrs().test(semantics::Attr::NOPASS)) {
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auto passName{binding.passName()};
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for (auto &dummy : result->dummyArguments) {
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if (!passName || dummy.name.c_str() == *passName) {
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dummy.pass = true;
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return result;
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}
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}
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DIE("PASS argument missing");
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}
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return result;
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} else {
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return std::optional<Procedure>{};
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}
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},
|
|
[&](const semantics::UseDetails &use) {
|
|
return CharacterizeProcedure(use.symbol(), context, seenProcs);
|
|
},
|
|
[&](const semantics::HostAssocDetails &assoc) {
|
|
return CharacterizeProcedure(assoc.symbol(), context, seenProcs);
|
|
},
|
|
[&](const semantics::EntityDetails &) {
|
|
context.messages().Say(
|
|
"Procedure '%s' is referenced before being sufficiently defined in a context where it must be so"_err_en_US,
|
|
symbol.name());
|
|
return std::optional<Procedure>{};
|
|
},
|
|
[&](const semantics::SubprogramNameDetails &) {
|
|
context.messages().Say(
|
|
"Procedure '%s' is referenced before being sufficiently defined in a context where it must be so"_err_en_US,
|
|
symbol.name());
|
|
return std::optional<Procedure>{};
|
|
},
|
|
[&](const auto &) {
|
|
context.messages().Say(
|
|
"'%s' is not a procedure"_err_en_US, symbol.name());
|
|
return std::optional<Procedure>{};
|
|
},
|
|
},
|
|
symbol.details());
|
|
}
|
|
|
|
static std::optional<DummyProcedure> CharacterizeDummyProcedure(
|
|
const semantics::Symbol &symbol, FoldingContext &context,
|
|
semantics::UnorderedSymbolSet seenProcs) {
|
|
if (auto procedure{CharacterizeProcedure(symbol, context, seenProcs)}) {
|
|
// Dummy procedures may not be elemental. Elemental dummy procedure
|
|
// interfaces are errors when the interface is not intrinsic, and that
|
|
// error is caught elsewhere. Elemental intrinsic interfaces are
|
|
// made non-elemental.
|
|
procedure->attrs.reset(Procedure::Attr::Elemental);
|
|
DummyProcedure result{std::move(procedure.value())};
|
|
CopyAttrs<DummyProcedure, DummyProcedure::Attr>(symbol, result,
|
|
{
|
|
{semantics::Attr::OPTIONAL, DummyProcedure::Attr::Optional},
|
|
{semantics::Attr::POINTER, DummyProcedure::Attr::Pointer},
|
|
});
|
|
result.intent = GetIntent(symbol.attrs());
|
|
return result;
|
|
} else {
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
llvm::raw_ostream &DummyProcedure::Dump(llvm::raw_ostream &o) const {
|
|
attrs.Dump(o, EnumToString);
|
|
if (intent != common::Intent::Default) {
|
|
o << "INTENT(" << common::EnumToString(intent) << ')';
|
|
}
|
|
procedure.value().Dump(o);
|
|
return o;
|
|
}
|
|
|
|
llvm::raw_ostream &AlternateReturn::Dump(llvm::raw_ostream &o) const {
|
|
return o << '*';
|
|
}
|
|
|
|
DummyArgument::~DummyArgument() {}
|
|
|
|
bool DummyArgument::operator==(const DummyArgument &that) const {
|
|
return u == that.u; // name and passed-object usage are not characteristics
|
|
}
|
|
|
|
bool DummyArgument::IsCompatibleWith(const DummyArgument &actual) const {
|
|
if (const auto *ifaceData{std::get_if<DummyDataObject>(&u)}) {
|
|
const auto *actualData{std::get_if<DummyDataObject>(&actual.u)};
|
|
return actualData && ifaceData->IsCompatibleWith(*actualData);
|
|
} else if (const auto *ifaceProc{std::get_if<DummyProcedure>(&u)}) {
|
|
const auto *actualProc{std::get_if<DummyProcedure>(&actual.u)};
|
|
return actualProc && ifaceProc->IsCompatibleWith(*actualProc);
|
|
} else {
|
|
return std::holds_alternative<AlternateReturn>(u) &&
|
|
std::holds_alternative<AlternateReturn>(actual.u);
|
|
}
|
|
}
|
|
|
|
static std::optional<DummyArgument> CharacterizeDummyArgument(
|
|
const semantics::Symbol &symbol, FoldingContext &context,
|
|
semantics::UnorderedSymbolSet seenProcs) {
|
|
auto name{symbol.name().ToString()};
|
|
if (symbol.has<semantics::ObjectEntityDetails>() ||
|
|
symbol.has<semantics::EntityDetails>()) {
|
|
if (auto obj{DummyDataObject::Characterize(symbol, context)}) {
|
|
return DummyArgument{std::move(name), std::move(obj.value())};
|
|
}
|
|
} else if (auto proc{
|
|
CharacterizeDummyProcedure(symbol, context, seenProcs)}) {
|
|
return DummyArgument{std::move(name), std::move(proc.value())};
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::optional<DummyArgument> DummyArgument::FromActual(
|
|
std::string &&name, const Expr<SomeType> &expr, FoldingContext &context) {
|
|
return common::visit(
|
|
common::visitors{
|
|
[&](const BOZLiteralConstant &) {
|
|
return std::make_optional<DummyArgument>(std::move(name),
|
|
DummyDataObject{
|
|
TypeAndShape{DynamicType::TypelessIntrinsicArgument()}});
|
|
},
|
|
[&](const NullPointer &) {
|
|
return std::make_optional<DummyArgument>(std::move(name),
|
|
DummyDataObject{
|
|
TypeAndShape{DynamicType::TypelessIntrinsicArgument()}});
|
|
},
|
|
[&](const ProcedureDesignator &designator) {
|
|
if (auto proc{Procedure::Characterize(designator, context)}) {
|
|
return std::make_optional<DummyArgument>(
|
|
std::move(name), DummyProcedure{std::move(*proc)});
|
|
} else {
|
|
return std::optional<DummyArgument>{};
|
|
}
|
|
},
|
|
[&](const ProcedureRef &call) {
|
|
if (auto proc{Procedure::Characterize(call, context)}) {
|
|
return std::make_optional<DummyArgument>(
|
|
std::move(name), DummyProcedure{std::move(*proc)});
|
|
} else {
|
|
return std::optional<DummyArgument>{};
|
|
}
|
|
},
|
|
[&](const auto &) {
|
|
if (auto type{TypeAndShape::Characterize(expr, context)}) {
|
|
return std::make_optional<DummyArgument>(
|
|
std::move(name), DummyDataObject{std::move(*type)});
|
|
} else {
|
|
return std::optional<DummyArgument>{};
|
|
}
|
|
},
|
|
},
|
|
expr.u);
|
|
}
|
|
|
|
bool DummyArgument::IsOptional() const {
|
|
return common::visit(
|
|
common::visitors{
|
|
[](const DummyDataObject &data) {
|
|
return data.attrs.test(DummyDataObject::Attr::Optional);
|
|
},
|
|
[](const DummyProcedure &proc) {
|
|
return proc.attrs.test(DummyProcedure::Attr::Optional);
|
|
},
|
|
[](const AlternateReturn &) { return false; },
|
|
},
|
|
u);
|
|
}
|
|
|
|
void DummyArgument::SetOptional(bool value) {
|
|
common::visit(common::visitors{
|
|
[value](DummyDataObject &data) {
|
|
data.attrs.set(DummyDataObject::Attr::Optional, value);
|
|
},
|
|
[value](DummyProcedure &proc) {
|
|
proc.attrs.set(DummyProcedure::Attr::Optional, value);
|
|
},
|
|
[](AlternateReturn &) { DIE("cannot set optional"); },
|
|
},
|
|
u);
|
|
}
|
|
|
|
void DummyArgument::SetIntent(common::Intent intent) {
|
|
common::visit(common::visitors{
|
|
[intent](DummyDataObject &data) { data.intent = intent; },
|
|
[intent](DummyProcedure &proc) { proc.intent = intent; },
|
|
[](AlternateReturn &) { DIE("cannot set intent"); },
|
|
},
|
|
u);
|
|
}
|
|
|
|
common::Intent DummyArgument::GetIntent() const {
|
|
return common::visit(
|
|
common::visitors{
|
|
[](const DummyDataObject &data) { return data.intent; },
|
|
[](const DummyProcedure &proc) { return proc.intent; },
|
|
[](const AlternateReturn &) -> common::Intent {
|
|
DIE("Alternate returns have no intent");
|
|
},
|
|
},
|
|
u);
|
|
}
|
|
|
|
bool DummyArgument::CanBePassedViaImplicitInterface() const {
|
|
if (const auto *object{std::get_if<DummyDataObject>(&u)}) {
|
|
return object->CanBePassedViaImplicitInterface();
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool DummyArgument::IsTypelessIntrinsicDummy() const {
|
|
const auto *argObj{std::get_if<characteristics::DummyDataObject>(&u)};
|
|
return argObj && argObj->type.type().IsTypelessIntrinsicArgument();
|
|
}
|
|
|
|
llvm::raw_ostream &DummyArgument::Dump(llvm::raw_ostream &o) const {
|
|
if (!name.empty()) {
|
|
o << name << '=';
|
|
}
|
|
if (pass) {
|
|
o << " PASS";
|
|
}
|
|
common::visit([&](const auto &x) { x.Dump(o); }, u);
|
|
return o;
|
|
}
|
|
|
|
FunctionResult::FunctionResult(DynamicType t) : u{TypeAndShape{t}} {}
|
|
FunctionResult::FunctionResult(TypeAndShape &&t) : u{std::move(t)} {}
|
|
FunctionResult::FunctionResult(Procedure &&p) : u{std::move(p)} {}
|
|
FunctionResult::~FunctionResult() {}
|
|
|
|
bool FunctionResult::operator==(const FunctionResult &that) const {
|
|
return attrs == that.attrs && u == that.u;
|
|
}
|
|
|
|
static std::optional<FunctionResult> CharacterizeFunctionResult(
|
|
const semantics::Symbol &symbol, FoldingContext &context,
|
|
semantics::UnorderedSymbolSet seenProcs) {
|
|
if (symbol.has<semantics::ObjectEntityDetails>()) {
|
|
if (auto type{TypeAndShape::Characterize(symbol, context)}) {
|
|
FunctionResult result{std::move(*type)};
|
|
CopyAttrs<FunctionResult, FunctionResult::Attr>(symbol, result,
|
|
{
|
|
{semantics::Attr::ALLOCATABLE, FunctionResult::Attr::Allocatable},
|
|
{semantics::Attr::CONTIGUOUS, FunctionResult::Attr::Contiguous},
|
|
{semantics::Attr::POINTER, FunctionResult::Attr::Pointer},
|
|
});
|
|
return result;
|
|
}
|
|
} else if (auto maybeProc{
|
|
CharacterizeProcedure(symbol, context, seenProcs)}) {
|
|
FunctionResult result{std::move(*maybeProc)};
|
|
result.attrs.set(FunctionResult::Attr::Pointer);
|
|
return result;
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::optional<FunctionResult> FunctionResult::Characterize(
|
|
const Symbol &symbol, FoldingContext &context) {
|
|
semantics::UnorderedSymbolSet seenProcs;
|
|
return CharacterizeFunctionResult(symbol, context, seenProcs);
|
|
}
|
|
|
|
bool FunctionResult::IsAssumedLengthCharacter() const {
|
|
if (const auto *ts{std::get_if<TypeAndShape>(&u)}) {
|
|
return ts->type().IsAssumedLengthCharacter();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool FunctionResult::CanBeReturnedViaImplicitInterface() const {
|
|
if (attrs.test(Attr::Pointer) || attrs.test(Attr::Allocatable)) {
|
|
return false; // 15.4.2.2(4)(b)
|
|
} else if (const auto *typeAndShape{GetTypeAndShape()}) {
|
|
if (typeAndShape->Rank() > 0) {
|
|
return false; // 15.4.2.2(4)(a)
|
|
} else {
|
|
const DynamicType &type{typeAndShape->type()};
|
|
switch (type.category()) {
|
|
case TypeCategory::Character:
|
|
if (type.knownLength()) {
|
|
return true;
|
|
} else if (const auto *param{type.charLengthParamValue()}) {
|
|
if (const auto &expr{param->GetExplicit()}) {
|
|
return IsConstantExpr(*expr); // 15.4.2.2(4)(c)
|
|
} else if (param->isAssumed()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
case TypeCategory::Derived:
|
|
if (!type.IsPolymorphic()) {
|
|
const auto &spec{type.GetDerivedTypeSpec()};
|
|
for (const auto &pair : spec.parameters()) {
|
|
if (const auto &expr{pair.second.GetExplicit()}) {
|
|
if (!IsConstantExpr(*expr)) {
|
|
return false; // 15.4.2.2(4)(c)
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
} else {
|
|
return false; // 15.4.2.2(4)(b) - procedure pointer
|
|
}
|
|
}
|
|
|
|
bool FunctionResult::IsCompatibleWith(const FunctionResult &actual) const {
|
|
Attrs actualAttrs{actual.attrs};
|
|
actualAttrs.reset(Attr::Contiguous);
|
|
if (attrs != actualAttrs) {
|
|
return false;
|
|
} else if (const auto *ifaceTypeShape{std::get_if<TypeAndShape>(&u)}) {
|
|
if (const auto *actualTypeShape{std::get_if<TypeAndShape>(&actual.u)}) {
|
|
if (ifaceTypeShape->shape() != actualTypeShape->shape()) {
|
|
return false;
|
|
} else {
|
|
return ifaceTypeShape->type().IsTkCompatibleWith(
|
|
actualTypeShape->type());
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
} else {
|
|
const auto *ifaceProc{std::get_if<CopyableIndirection<Procedure>>(&u)};
|
|
if (const auto *actualProc{
|
|
std::get_if<CopyableIndirection<Procedure>>(&actual.u)}) {
|
|
return ifaceProc->value().IsCompatibleWith(actualProc->value());
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
llvm::raw_ostream &FunctionResult::Dump(llvm::raw_ostream &o) const {
|
|
attrs.Dump(o, EnumToString);
|
|
common::visit(common::visitors{
|
|
[&](const TypeAndShape &ts) { ts.Dump(o); },
|
|
[&](const CopyableIndirection<Procedure> &p) {
|
|
p.value().Dump(o << " procedure(") << ')';
|
|
},
|
|
},
|
|
u);
|
|
return o;
|
|
}
|
|
|
|
Procedure::Procedure(FunctionResult &&fr, DummyArguments &&args, Attrs a)
|
|
: functionResult{std::move(fr)}, dummyArguments{std::move(args)}, attrs{a} {
|
|
}
|
|
Procedure::Procedure(DummyArguments &&args, Attrs a)
|
|
: dummyArguments{std::move(args)}, attrs{a} {}
|
|
Procedure::~Procedure() {}
|
|
|
|
bool Procedure::operator==(const Procedure &that) const {
|
|
return attrs == that.attrs && functionResult == that.functionResult &&
|
|
dummyArguments == that.dummyArguments;
|
|
}
|
|
|
|
bool Procedure::IsCompatibleWith(const Procedure &actual) const {
|
|
// 15.5.2.9(1): if dummy is not pure, actual need not be.
|
|
Attrs actualAttrs{actual.attrs};
|
|
if (!attrs.test(Attr::Pure)) {
|
|
actualAttrs.reset(Attr::Pure);
|
|
}
|
|
if (attrs != actualAttrs) {
|
|
return false;
|
|
} else if (IsFunction() != actual.IsFunction()) {
|
|
return false;
|
|
} else if (IsFunction() &&
|
|
!functionResult->IsCompatibleWith(*actual.functionResult)) {
|
|
return false;
|
|
} else if (dummyArguments.size() != actual.dummyArguments.size()) {
|
|
return false;
|
|
} else {
|
|
for (std::size_t j{0}; j < dummyArguments.size(); ++j) {
|
|
if (!dummyArguments[j].IsCompatibleWith(actual.dummyArguments[j])) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
int Procedure::FindPassIndex(std::optional<parser::CharBlock> name) const {
|
|
int argCount{static_cast<int>(dummyArguments.size())};
|
|
int index{0};
|
|
if (name) {
|
|
while (index < argCount && *name != dummyArguments[index].name.c_str()) {
|
|
++index;
|
|
}
|
|
}
|
|
CHECK(index < argCount);
|
|
return index;
|
|
}
|
|
|
|
bool Procedure::CanOverride(
|
|
const Procedure &that, std::optional<int> passIndex) const {
|
|
// A pure procedure may override an impure one (7.5.7.3(2))
|
|
if ((that.attrs.test(Attr::Pure) && !attrs.test(Attr::Pure)) ||
|
|
that.attrs.test(Attr::Elemental) != attrs.test(Attr::Elemental) ||
|
|
functionResult != that.functionResult) {
|
|
return false;
|
|
}
|
|
int argCount{static_cast<int>(dummyArguments.size())};
|
|
if (argCount != static_cast<int>(that.dummyArguments.size())) {
|
|
return false;
|
|
}
|
|
for (int j{0}; j < argCount; ++j) {
|
|
if ((!passIndex || j != *passIndex) &&
|
|
dummyArguments[j] != that.dummyArguments[j]) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
std::optional<Procedure> Procedure::Characterize(
|
|
const semantics::Symbol &original, FoldingContext &context) {
|
|
semantics::UnorderedSymbolSet seenProcs;
|
|
return CharacterizeProcedure(original, context, seenProcs);
|
|
}
|
|
|
|
std::optional<Procedure> Procedure::Characterize(
|
|
const ProcedureDesignator &proc, FoldingContext &context) {
|
|
if (const auto *symbol{proc.GetSymbol()}) {
|
|
if (auto result{
|
|
characteristics::Procedure::Characterize(*symbol, context)}) {
|
|
return result;
|
|
}
|
|
} else if (const auto *intrinsic{proc.GetSpecificIntrinsic()}) {
|
|
return intrinsic->characteristics.value();
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::optional<Procedure> Procedure::Characterize(
|
|
const ProcedureRef &ref, FoldingContext &context) {
|
|
if (auto callee{Characterize(ref.proc(), context)}) {
|
|
if (callee->functionResult) {
|
|
if (const Procedure *
|
|
proc{callee->functionResult->IsProcedurePointer()}) {
|
|
return {*proc};
|
|
}
|
|
}
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
bool Procedure::CanBeCalledViaImplicitInterface() const {
|
|
// TODO: Pass back information on why we return false
|
|
if (attrs.test(Attr::Elemental) || attrs.test(Attr::BindC)) {
|
|
return false; // 15.4.2.2(5,6)
|
|
} else if (IsFunction() &&
|
|
!functionResult->CanBeReturnedViaImplicitInterface()) {
|
|
return false;
|
|
} else {
|
|
for (const DummyArgument &arg : dummyArguments) {
|
|
if (!arg.CanBePassedViaImplicitInterface()) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
llvm::raw_ostream &Procedure::Dump(llvm::raw_ostream &o) const {
|
|
attrs.Dump(o, EnumToString);
|
|
if (functionResult) {
|
|
functionResult->Dump(o << "TYPE(") << ") FUNCTION";
|
|
} else {
|
|
o << "SUBROUTINE";
|
|
}
|
|
char sep{'('};
|
|
for (const auto &dummy : dummyArguments) {
|
|
dummy.Dump(o << sep);
|
|
sep = ',';
|
|
}
|
|
return o << (sep == '(' ? "()" : ")");
|
|
}
|
|
|
|
// Utility class to determine if Procedures, etc. are distinguishable
|
|
class DistinguishUtils {
|
|
public:
|
|
explicit DistinguishUtils(const common::LanguageFeatureControl &features)
|
|
: features_{features} {}
|
|
|
|
// Are these procedures distinguishable for a generic name?
|
|
bool Distinguishable(const Procedure &, const Procedure &) const;
|
|
// Are these procedures distinguishable for a generic operator or assignment?
|
|
bool DistinguishableOpOrAssign(const Procedure &, const Procedure &) const;
|
|
|
|
private:
|
|
struct CountDummyProcedures {
|
|
CountDummyProcedures(const DummyArguments &args) {
|
|
for (const DummyArgument &arg : args) {
|
|
if (std::holds_alternative<DummyProcedure>(arg.u)) {
|
|
total += 1;
|
|
notOptional += !arg.IsOptional();
|
|
}
|
|
}
|
|
}
|
|
int total{0};
|
|
int notOptional{0};
|
|
};
|
|
|
|
bool Rule3Distinguishable(const Procedure &, const Procedure &) const;
|
|
const DummyArgument *Rule1DistinguishingArg(
|
|
const DummyArguments &, const DummyArguments &) const;
|
|
int FindFirstToDistinguishByPosition(
|
|
const DummyArguments &, const DummyArguments &) const;
|
|
int FindLastToDistinguishByName(
|
|
const DummyArguments &, const DummyArguments &) const;
|
|
int CountCompatibleWith(const DummyArgument &, const DummyArguments &) const;
|
|
int CountNotDistinguishableFrom(
|
|
const DummyArgument &, const DummyArguments &) const;
|
|
bool Distinguishable(const DummyArgument &, const DummyArgument &) const;
|
|
bool Distinguishable(const DummyDataObject &, const DummyDataObject &) const;
|
|
bool Distinguishable(const DummyProcedure &, const DummyProcedure &) const;
|
|
bool Distinguishable(const FunctionResult &, const FunctionResult &) const;
|
|
bool Distinguishable(const TypeAndShape &, const TypeAndShape &) const;
|
|
bool IsTkrCompatible(const DummyArgument &, const DummyArgument &) const;
|
|
bool IsTkrCompatible(const TypeAndShape &, const TypeAndShape &) const;
|
|
const DummyArgument *GetAtEffectivePosition(
|
|
const DummyArguments &, int) const;
|
|
const DummyArgument *GetPassArg(const Procedure &) const;
|
|
|
|
const common::LanguageFeatureControl &features_;
|
|
};
|
|
|
|
// Simpler distinguishability rules for operators and assignment
|
|
bool DistinguishUtils::DistinguishableOpOrAssign(
|
|
const Procedure &proc1, const Procedure &proc2) const {
|
|
auto &args1{proc1.dummyArguments};
|
|
auto &args2{proc2.dummyArguments};
|
|
if (args1.size() != args2.size()) {
|
|
return true; // C1511: distinguishable based on number of arguments
|
|
}
|
|
for (std::size_t i{0}; i < args1.size(); ++i) {
|
|
if (Distinguishable(args1[i], args2[i])) {
|
|
return true; // C1511, C1512: distinguishable based on this arg
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DistinguishUtils::Distinguishable(
|
|
const Procedure &proc1, const Procedure &proc2) const {
|
|
auto &args1{proc1.dummyArguments};
|
|
auto &args2{proc2.dummyArguments};
|
|
auto count1{CountDummyProcedures(args1)};
|
|
auto count2{CountDummyProcedures(args2)};
|
|
if (count1.notOptional > count2.total || count2.notOptional > count1.total) {
|
|
return true; // distinguishable based on C1514 rule 2
|
|
}
|
|
if (Rule3Distinguishable(proc1, proc2)) {
|
|
return true; // distinguishable based on C1514 rule 3
|
|
}
|
|
if (Rule1DistinguishingArg(args1, args2)) {
|
|
return true; // distinguishable based on C1514 rule 1
|
|
}
|
|
int pos1{FindFirstToDistinguishByPosition(args1, args2)};
|
|
int name1{FindLastToDistinguishByName(args1, args2)};
|
|
if (pos1 >= 0 && pos1 <= name1) {
|
|
return true; // distinguishable based on C1514 rule 4
|
|
}
|
|
int pos2{FindFirstToDistinguishByPosition(args2, args1)};
|
|
int name2{FindLastToDistinguishByName(args2, args1)};
|
|
if (pos2 >= 0 && pos2 <= name2) {
|
|
return true; // distinguishable based on C1514 rule 4
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// C1514 rule 3: Procedures are distinguishable if both have a passed-object
|
|
// dummy argument and those are distinguishable.
|
|
bool DistinguishUtils::Rule3Distinguishable(
|
|
const Procedure &proc1, const Procedure &proc2) const {
|
|
const DummyArgument *pass1{GetPassArg(proc1)};
|
|
const DummyArgument *pass2{GetPassArg(proc2)};
|
|
return pass1 && pass2 && Distinguishable(*pass1, *pass2);
|
|
}
|
|
|
|
// Find a non-passed-object dummy data object in one of the argument lists
|
|
// that satisfies C1514 rule 1. I.e. x such that:
|
|
// - m is the number of dummy data objects in one that are nonoptional,
|
|
// are not passed-object, that x is TKR compatible with
|
|
// - n is the number of non-passed-object dummy data objects, in the other
|
|
// that are not distinguishable from x
|
|
// - m is greater than n
|
|
const DummyArgument *DistinguishUtils::Rule1DistinguishingArg(
|
|
const DummyArguments &args1, const DummyArguments &args2) const {
|
|
auto size1{args1.size()};
|
|
auto size2{args2.size()};
|
|
for (std::size_t i{0}; i < size1 + size2; ++i) {
|
|
const DummyArgument &x{i < size1 ? args1[i] : args2[i - size1]};
|
|
if (!x.pass && std::holds_alternative<DummyDataObject>(x.u)) {
|
|
if (CountCompatibleWith(x, args1) >
|
|
CountNotDistinguishableFrom(x, args2) ||
|
|
CountCompatibleWith(x, args2) >
|
|
CountNotDistinguishableFrom(x, args1)) {
|
|
return &x;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Find the index of the first nonoptional non-passed-object dummy argument
|
|
// in args1 at an effective position such that either:
|
|
// - args2 has no dummy argument at that effective position
|
|
// - the dummy argument at that position is distinguishable from it
|
|
int DistinguishUtils::FindFirstToDistinguishByPosition(
|
|
const DummyArguments &args1, const DummyArguments &args2) const {
|
|
int effective{0}; // position of arg1 in list, ignoring passed arg
|
|
for (std::size_t i{0}; i < args1.size(); ++i) {
|
|
const DummyArgument &arg1{args1.at(i)};
|
|
if (!arg1.pass && !arg1.IsOptional()) {
|
|
const DummyArgument *arg2{GetAtEffectivePosition(args2, effective)};
|
|
if (!arg2 || Distinguishable(arg1, *arg2)) {
|
|
return i;
|
|
}
|
|
}
|
|
effective += !arg1.pass;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
// Find the index of the last nonoptional non-passed-object dummy argument
|
|
// in args1 whose name is such that either:
|
|
// - args2 has no dummy argument with that name
|
|
// - the dummy argument with that name is distinguishable from it
|
|
int DistinguishUtils::FindLastToDistinguishByName(
|
|
const DummyArguments &args1, const DummyArguments &args2) const {
|
|
std::map<std::string, const DummyArgument *> nameToArg;
|
|
for (const auto &arg2 : args2) {
|
|
nameToArg.emplace(arg2.name, &arg2);
|
|
}
|
|
for (int i = args1.size() - 1; i >= 0; --i) {
|
|
const DummyArgument &arg1{args1.at(i)};
|
|
if (!arg1.pass && !arg1.IsOptional()) {
|
|
auto it{nameToArg.find(arg1.name)};
|
|
if (it == nameToArg.end() || Distinguishable(arg1, *it->second)) {
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
// Count the dummy data objects in args that are nonoptional, are not
|
|
// passed-object, and that x is TKR compatible with
|
|
int DistinguishUtils::CountCompatibleWith(
|
|
const DummyArgument &x, const DummyArguments &args) const {
|
|
return std::count_if(args.begin(), args.end(), [&](const DummyArgument &y) {
|
|
return !y.pass && !y.IsOptional() && IsTkrCompatible(x, y);
|
|
});
|
|
}
|
|
|
|
// Return the number of dummy data objects in args that are not
|
|
// distinguishable from x and not passed-object.
|
|
int DistinguishUtils::CountNotDistinguishableFrom(
|
|
const DummyArgument &x, const DummyArguments &args) const {
|
|
return std::count_if(args.begin(), args.end(), [&](const DummyArgument &y) {
|
|
return !y.pass && std::holds_alternative<DummyDataObject>(y.u) &&
|
|
!Distinguishable(y, x);
|
|
});
|
|
}
|
|
|
|
bool DistinguishUtils::Distinguishable(
|
|
const DummyArgument &x, const DummyArgument &y) const {
|
|
if (x.u.index() != y.u.index()) {
|
|
return true; // different kind: data/proc/alt-return
|
|
}
|
|
return common::visit(
|
|
common::visitors{
|
|
[&](const DummyDataObject &z) {
|
|
return Distinguishable(z, std::get<DummyDataObject>(y.u));
|
|
},
|
|
[&](const DummyProcedure &z) {
|
|
return Distinguishable(z, std::get<DummyProcedure>(y.u));
|
|
},
|
|
[&](const AlternateReturn &) { return false; },
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
bool DistinguishUtils::Distinguishable(
|
|
const DummyDataObject &x, const DummyDataObject &y) const {
|
|
using Attr = DummyDataObject::Attr;
|
|
if (Distinguishable(x.type, y.type)) {
|
|
return true;
|
|
} else if (x.attrs.test(Attr::Allocatable) && y.attrs.test(Attr::Pointer) &&
|
|
y.intent != common::Intent::In) {
|
|
return true;
|
|
} else if (y.attrs.test(Attr::Allocatable) && x.attrs.test(Attr::Pointer) &&
|
|
x.intent != common::Intent::In) {
|
|
return true;
|
|
} else if (features_.IsEnabled(
|
|
common::LanguageFeature::DistinguishableSpecifics) &&
|
|
(x.attrs.test(Attr::Allocatable) || x.attrs.test(Attr::Pointer)) &&
|
|
(y.attrs.test(Attr::Allocatable) || y.attrs.test(Attr::Pointer)) &&
|
|
(x.type.type().IsUnlimitedPolymorphic() !=
|
|
y.type.type().IsUnlimitedPolymorphic() ||
|
|
x.type.type().IsPolymorphic() != y.type.type().IsPolymorphic())) {
|
|
// Extension: Per 15.5.2.5(2), an allocatable/pointer dummy and its
|
|
// corresponding actual argument must both or neither be polymorphic,
|
|
// and must both or neither be unlimited polymorphic. So when exactly
|
|
// one of two dummy arguments is polymorphic or unlimited polymorphic,
|
|
// any actual argument that is admissible to one of them cannot also match
|
|
// the other one.
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool DistinguishUtils::Distinguishable(
|
|
const DummyProcedure &x, const DummyProcedure &y) const {
|
|
const Procedure &xProc{x.procedure.value()};
|
|
const Procedure &yProc{y.procedure.value()};
|
|
if (Distinguishable(xProc, yProc)) {
|
|
return true;
|
|
} else {
|
|
const std::optional<FunctionResult> &xResult{xProc.functionResult};
|
|
const std::optional<FunctionResult> &yResult{yProc.functionResult};
|
|
return xResult ? !yResult || Distinguishable(*xResult, *yResult)
|
|
: yResult.has_value();
|
|
}
|
|
}
|
|
|
|
bool DistinguishUtils::Distinguishable(
|
|
const FunctionResult &x, const FunctionResult &y) const {
|
|
if (x.u.index() != y.u.index()) {
|
|
return true; // one is data object, one is procedure
|
|
}
|
|
return common::visit(
|
|
common::visitors{
|
|
[&](const TypeAndShape &z) {
|
|
return Distinguishable(z, std::get<TypeAndShape>(y.u));
|
|
},
|
|
[&](const CopyableIndirection<Procedure> &z) {
|
|
return Distinguishable(z.value(),
|
|
std::get<CopyableIndirection<Procedure>>(y.u).value());
|
|
},
|
|
},
|
|
x.u);
|
|
}
|
|
|
|
bool DistinguishUtils::Distinguishable(
|
|
const TypeAndShape &x, const TypeAndShape &y) const {
|
|
return !IsTkrCompatible(x, y) && !IsTkrCompatible(y, x);
|
|
}
|
|
|
|
// Compatibility based on type, kind, and rank
|
|
bool DistinguishUtils::IsTkrCompatible(
|
|
const DummyArgument &x, const DummyArgument &y) const {
|
|
const auto *obj1{std::get_if<DummyDataObject>(&x.u)};
|
|
const auto *obj2{std::get_if<DummyDataObject>(&y.u)};
|
|
return obj1 && obj2 && IsTkrCompatible(obj1->type, obj2->type);
|
|
}
|
|
bool DistinguishUtils::IsTkrCompatible(
|
|
const TypeAndShape &x, const TypeAndShape &y) const {
|
|
return x.type().IsTkCompatibleWith(y.type()) &&
|
|
(x.attrs().test(TypeAndShape::Attr::AssumedRank) ||
|
|
y.attrs().test(TypeAndShape::Attr::AssumedRank) ||
|
|
x.Rank() == y.Rank());
|
|
}
|
|
|
|
// Return the argument at the given index, ignoring the passed arg
|
|
const DummyArgument *DistinguishUtils::GetAtEffectivePosition(
|
|
const DummyArguments &args, int index) const {
|
|
for (const DummyArgument &arg : args) {
|
|
if (!arg.pass) {
|
|
if (index == 0) {
|
|
return &arg;
|
|
}
|
|
--index;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Return the passed-object dummy argument of this procedure, if any
|
|
const DummyArgument *DistinguishUtils::GetPassArg(const Procedure &proc) const {
|
|
for (const auto &arg : proc.dummyArguments) {
|
|
if (arg.pass) {
|
|
return &arg;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool Distinguishable(const common::LanguageFeatureControl &features,
|
|
const Procedure &x, const Procedure &y) {
|
|
return DistinguishUtils{features}.Distinguishable(x, y);
|
|
}
|
|
|
|
bool DistinguishableOpOrAssign(const common::LanguageFeatureControl &features,
|
|
const Procedure &x, const Procedure &y) {
|
|
return DistinguishUtils{features}.DistinguishableOpOrAssign(x, y);
|
|
}
|
|
|
|
DEFINE_DEFAULT_CONSTRUCTORS_AND_ASSIGNMENTS(DummyArgument)
|
|
DEFINE_DEFAULT_CONSTRUCTORS_AND_ASSIGNMENTS(DummyProcedure)
|
|
DEFINE_DEFAULT_CONSTRUCTORS_AND_ASSIGNMENTS(FunctionResult)
|
|
DEFINE_DEFAULT_CONSTRUCTORS_AND_ASSIGNMENTS(Procedure)
|
|
} // namespace Fortran::evaluate::characteristics
|
|
|
|
template class Fortran::common::Indirection<
|
|
Fortran::evaluate::characteristics::Procedure, true>;
|