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llvm-project/flang/lib/Lower/Support/Utils.cpp
Thirumalai Shaktivel 160da73b85
[Flang] Check if two ArrayConstructor's are Equal (#121181) 
This also includes comparing the two ImpliedDo

Details
- For ArrayConstructor, check if x and y have the same
  elements and type
- For ImpliedDo, check if x and y have the same lower,
  upper, stride and values

Fixes: https://github.com/llvm/llvm-project/issues/104526
2025-02-19 15:21:31 +05:30

644 lines
27 KiB
C++
Raw Blame History

//===-- Lower/Support/Utils.cpp -- utilities --------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Coding style: https://mlir.llvm.org/getting_started/DeveloperGuide/
//
//===----------------------------------------------------------------------===//
#include "flang/Lower/Support/Utils.h"
#include "flang/Common/indirection.h"
#include "flang/Lower/IterationSpace.h"
#include "flang/Semantics/tools.h"
#include <cstdint>
#include <optional>
#include <type_traits>
namespace Fortran::lower {
// Fortran::evaluate::Expr are functional values organized like an AST. A
// Fortran::evaluate::Expr is meant to be moved and cloned. Using the front end
// tools can often cause copies and extra wrapper classes to be added to any
// Fortran::evaluate::Expr. These values should not be assumed or relied upon to
// have an *object* identity. They are deeply recursive, irregular structures
// built from a large number of classes which do not use inheritance and
// necessitate a large volume of boilerplate code as a result.
//
// Contrastingly, LLVM data structures make ubiquitous assumptions about an
// object's identity via pointers to the object. An object's location in memory
// is thus very often an identifying relation.
// This class defines a hash computation of a Fortran::evaluate::Expr tree value
// so it can be used with llvm::DenseMap. The Fortran::evaluate::Expr need not
// have the same address.
class HashEvaluateExpr {
public:
// A Se::Symbol is the only part of an Fortran::evaluate::Expr with an
// identity property.
static unsigned getHashValue(const Fortran::semantics::Symbol &x) {
return static_cast<unsigned>(reinterpret_cast<std::intptr_t>(&x));
}
template <typename A, bool COPY>
static unsigned getHashValue(const Fortran::common::Indirection<A, COPY> &x) {
return getHashValue(x.value());
}
template <typename A>
static unsigned getHashValue(const std::optional<A> &x) {
if (x.has_value())
return getHashValue(x.value());
return 0u;
}
static unsigned getHashValue(const Fortran::evaluate::Subscript &x) {
return Fortran::common::visit(
[&](const auto &v) { return getHashValue(v); }, x.u);
}
static unsigned getHashValue(const Fortran::evaluate::Triplet &x) {
return getHashValue(x.lower()) - getHashValue(x.upper()) * 5u -
getHashValue(x.stride()) * 11u;
}
static unsigned getHashValue(const Fortran::evaluate::Component &x) {
return getHashValue(x.base()) * 83u - getHashValue(x.GetLastSymbol());
}
static unsigned getHashValue(const Fortran::evaluate::ArrayRef &x) {
unsigned subs = 1u;
for (const Fortran::evaluate::Subscript &v : x.subscript())
subs -= getHashValue(v);
return getHashValue(x.base()) * 89u - subs;
}
static unsigned getHashValue(const Fortran::evaluate::CoarrayRef &x) {
unsigned subs = 1u;
for (const Fortran::evaluate::Subscript &v : x.subscript())
subs -= getHashValue(v);
unsigned cosubs = 3u;
for (const Fortran::evaluate::Expr<Fortran::evaluate::SubscriptInteger> &v :
x.cosubscript())
cosubs -= getHashValue(v);
unsigned syms = 7u;
for (const Fortran::evaluate::SymbolRef &v : x.base())
syms += getHashValue(v);
return syms * 97u - subs - cosubs + getHashValue(x.stat()) + 257u +
getHashValue(x.team());
}
static unsigned getHashValue(const Fortran::evaluate::NamedEntity &x) {
if (x.IsSymbol())
return getHashValue(x.GetFirstSymbol()) * 11u;
return getHashValue(x.GetComponent()) * 13u;
}
static unsigned getHashValue(const Fortran::evaluate::DataRef &x) {
return Fortran::common::visit(
[&](const auto &v) { return getHashValue(v); }, x.u);
}
static unsigned getHashValue(const Fortran::evaluate::ComplexPart &x) {
return getHashValue(x.complex()) - static_cast<unsigned>(x.part());
}
template <Fortran::common::TypeCategory TC1, int KIND,
Fortran::common::TypeCategory TC2>
static unsigned getHashValue(
const Fortran::evaluate::Convert<Fortran::evaluate::Type<TC1, KIND>, TC2>
&x) {
return getHashValue(x.left()) - (static_cast<unsigned>(TC1) + 2u) -
(static_cast<unsigned>(KIND) + 5u);
}
template <int KIND>
static unsigned
getHashValue(const Fortran::evaluate::ComplexComponent<KIND> &x) {
return getHashValue(x.left()) -
(static_cast<unsigned>(x.isImaginaryPart) + 1u) * 3u;
}
template <typename T>
static unsigned getHashValue(const Fortran::evaluate::Parentheses<T> &x) {
return getHashValue(x.left()) * 17u;
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Negate<Fortran::evaluate::Type<TC, KIND>> &x) {
return getHashValue(x.left()) - (static_cast<unsigned>(TC) + 5u) -
(static_cast<unsigned>(KIND) + 7u);
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Add<Fortran::evaluate::Type<TC, KIND>> &x) {
return (getHashValue(x.left()) + getHashValue(x.right())) * 23u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND);
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Subtract<Fortran::evaluate::Type<TC, KIND>> &x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 19u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND);
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Multiply<Fortran::evaluate::Type<TC, KIND>> &x) {
return (getHashValue(x.left()) + getHashValue(x.right())) * 29u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND);
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Divide<Fortran::evaluate::Type<TC, KIND>> &x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 31u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND);
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Power<Fortran::evaluate::Type<TC, KIND>> &x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 37u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND);
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Extremum<Fortran::evaluate::Type<TC, KIND>> &x) {
return (getHashValue(x.left()) + getHashValue(x.right())) * 41u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND) +
static_cast<unsigned>(x.ordering) * 7u;
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::RealToIntPower<Fortran::evaluate::Type<TC, KIND>>
&x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 43u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND);
}
template <int KIND>
static unsigned
getHashValue(const Fortran::evaluate::ComplexConstructor<KIND> &x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 47u +
static_cast<unsigned>(KIND);
}
template <int KIND>
static unsigned getHashValue(const Fortran::evaluate::Concat<KIND> &x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 53u +
static_cast<unsigned>(KIND);
}
template <int KIND>
static unsigned getHashValue(const Fortran::evaluate::SetLength<KIND> &x) {
return (getHashValue(x.left()) - getHashValue(x.right())) * 59u +
static_cast<unsigned>(KIND);
}
static unsigned getHashValue(const Fortran::semantics::SymbolRef &sym) {
return getHashValue(sym.get());
}
static unsigned getHashValue(const Fortran::evaluate::Substring &x) {
return 61u *
Fortran::common::visit(
[&](const auto &p) { return getHashValue(p); }, x.parent()) -
getHashValue(x.lower()) - (getHashValue(x.lower()) + 1u);
}
static unsigned
getHashValue(const Fortran::evaluate::StaticDataObject::Pointer &x) {
return llvm::hash_value(x->name());
}
static unsigned getHashValue(const Fortran::evaluate::SpecificIntrinsic &x) {
return llvm::hash_value(x.name);
}
template <typename A>
static unsigned getHashValue(const Fortran::evaluate::Constant<A> &x) {
// FIXME: Should hash the content.
return 103u;
}
static unsigned getHashValue(const Fortran::evaluate::ActualArgument &x) {
if (const Fortran::evaluate::Symbol *sym = x.GetAssumedTypeDummy())
return getHashValue(*sym);
return getHashValue(*x.UnwrapExpr());
}
static unsigned
getHashValue(const Fortran::evaluate::ProcedureDesignator &x) {
return Fortran::common::visit(
[&](const auto &v) { return getHashValue(v); }, x.u);
}
static unsigned getHashValue(const Fortran::evaluate::ProcedureRef &x) {
unsigned args = 13u;
for (const std::optional<Fortran::evaluate::ActualArgument> &v :
x.arguments())
args -= getHashValue(v);
return getHashValue(x.proc()) * 101u - args;
}
template <typename A>
static unsigned
getHashValue(const Fortran::evaluate::ArrayConstructor<A> &x) {
// FIXME: hash the contents.
return 127u;
}
static unsigned getHashValue(const Fortran::evaluate::ImpliedDoIndex &x) {
return llvm::hash_value(toStringRef(x.name).str()) * 131u;
}
static unsigned getHashValue(const Fortran::evaluate::TypeParamInquiry &x) {
return getHashValue(x.base()) * 137u - getHashValue(x.parameter()) * 3u;
}
static unsigned getHashValue(const Fortran::evaluate::DescriptorInquiry &x) {
return getHashValue(x.base()) * 139u -
static_cast<unsigned>(x.field()) * 13u +
static_cast<unsigned>(x.dimension());
}
static unsigned
getHashValue(const Fortran::evaluate::StructureConstructor &x) {
// FIXME: hash the contents.
return 149u;
}
template <int KIND>
static unsigned getHashValue(const Fortran::evaluate::Not<KIND> &x) {
return getHashValue(x.left()) * 61u + static_cast<unsigned>(KIND);
}
template <int KIND>
static unsigned
getHashValue(const Fortran::evaluate::LogicalOperation<KIND> &x) {
unsigned result = getHashValue(x.left()) + getHashValue(x.right());
return result * 67u + static_cast<unsigned>(x.logicalOperator) * 5u;
}
template <Fortran::common::TypeCategory TC, int KIND>
static unsigned getHashValue(
const Fortran::evaluate::Relational<Fortran::evaluate::Type<TC, KIND>>
&x) {
return (getHashValue(x.left()) + getHashValue(x.right())) * 71u +
static_cast<unsigned>(TC) + static_cast<unsigned>(KIND) +
static_cast<unsigned>(x.opr) * 11u;
}
template <typename A>
static unsigned getHashValue(const Fortran::evaluate::Expr<A> &x) {
return Fortran::common::visit(
[&](const auto &v) { return getHashValue(v); }, x.u);
}
static unsigned getHashValue(
const Fortran::evaluate::Relational<Fortran::evaluate::SomeType> &x) {
return Fortran::common::visit(
[&](const auto &v) { return getHashValue(v); }, x.u);
}
template <typename A>
static unsigned getHashValue(const Fortran::evaluate::Designator<A> &x) {
return Fortran::common::visit(
[&](const auto &v) { return getHashValue(v); }, x.u);
}
template <int BITS>
static unsigned
getHashValue(const Fortran::evaluate::value::Integer<BITS> &x) {
return static_cast<unsigned>(x.ToSInt());
}
static unsigned getHashValue(const Fortran::evaluate::NullPointer &x) {
return ~179u;
}
};
// Define the is equals test for using Fortran::evaluate::Expr values with
// llvm::DenseMap.
class IsEqualEvaluateExpr {
public:
// A Se::Symbol is the only part of an Fortran::evaluate::Expr with an
// identity property.
static bool isEqual(const Fortran::semantics::Symbol &x,
const Fortran::semantics::Symbol &y) {
return isEqual(&x, &y);
}
static bool isEqual(const Fortran::semantics::Symbol *x,
const Fortran::semantics::Symbol *y) {
return x == y;
}
template <typename A, bool COPY>
static bool isEqual(const Fortran::common::Indirection<A, COPY> &x,
const Fortran::common::Indirection<A, COPY> &y) {
return isEqual(x.value(), y.value());
}
template <typename A>
static bool isEqual(const std::optional<A> &x, const std::optional<A> &y) {
if (x.has_value() && y.has_value())
return isEqual(x.value(), y.value());
return !x.has_value() && !y.has_value();
}
template <typename A>
static bool isEqual(const std::vector<A> &x, const std::vector<A> &y) {
if (x.size() != y.size())
return false;
const std::size_t size = x.size();
for (std::remove_const_t<decltype(size)> i = 0; i < size; ++i)
if (!isEqual(x[i], y[i]))
return false;
return true;
}
static bool isEqual(const Fortran::evaluate::Subscript &x,
const Fortran::evaluate::Subscript &y) {
return Fortran::common::visit(
[&](const auto &v, const auto &w) { return isEqual(v, w); }, x.u, y.u);
}
static bool isEqual(const Fortran::evaluate::Triplet &x,
const Fortran::evaluate::Triplet &y) {
return isEqual(x.lower(), y.lower()) && isEqual(x.upper(), y.upper()) &&
isEqual(x.stride(), y.stride());
}
static bool isEqual(const Fortran::evaluate::Component &x,
const Fortran::evaluate::Component &y) {
return isEqual(x.base(), y.base()) &&
isEqual(x.GetLastSymbol(), y.GetLastSymbol());
}
static bool isEqual(const Fortran::evaluate::ArrayRef &x,
const Fortran::evaluate::ArrayRef &y) {
return isEqual(x.base(), y.base()) && isEqual(x.subscript(), y.subscript());
}
static bool isEqual(const Fortran::evaluate::CoarrayRef &x,
const Fortran::evaluate::CoarrayRef &y) {
return isEqual(x.base(), y.base()) &&
isEqual(x.subscript(), y.subscript()) &&
isEqual(x.cosubscript(), y.cosubscript()) &&
isEqual(x.stat(), y.stat()) && isEqual(x.team(), y.team());
}
static bool isEqual(const Fortran::evaluate::NamedEntity &x,
const Fortran::evaluate::NamedEntity &y) {
if (x.IsSymbol() && y.IsSymbol())
return isEqual(x.GetFirstSymbol(), y.GetFirstSymbol());
return !x.IsSymbol() && !y.IsSymbol() &&
isEqual(x.GetComponent(), y.GetComponent());
}
static bool isEqual(const Fortran::evaluate::DataRef &x,
const Fortran::evaluate::DataRef &y) {
return Fortran::common::visit(
[&](const auto &v, const auto &w) { return isEqual(v, w); }, x.u, y.u);
}
static bool isEqual(const Fortran::evaluate::ComplexPart &x,
const Fortran::evaluate::ComplexPart &y) {
return isEqual(x.complex(), y.complex()) && x.part() == y.part();
}
template <typename A, Fortran::common::TypeCategory TC2>
static bool isEqual(const Fortran::evaluate::Convert<A, TC2> &x,
const Fortran::evaluate::Convert<A, TC2> &y) {
return isEqual(x.left(), y.left());
}
template <int KIND>
static bool isEqual(const Fortran::evaluate::ComplexComponent<KIND> &x,
const Fortran::evaluate::ComplexComponent<KIND> &y) {
return isEqual(x.left(), y.left()) &&
x.isImaginaryPart == y.isImaginaryPart;
}
template <typename T>
static bool isEqual(const Fortran::evaluate::Parentheses<T> &x,
const Fortran::evaluate::Parentheses<T> &y) {
return isEqual(x.left(), y.left());
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Negate<A> &x,
const Fortran::evaluate::Negate<A> &y) {
return isEqual(x.left(), y.left());
}
template <typename A>
static bool isBinaryEqual(const A &x, const A &y) {
return isEqual(x.left(), y.left()) && isEqual(x.right(), y.right());
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Add<A> &x,
const Fortran::evaluate::Add<A> &y) {
return isBinaryEqual(x, y);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Subtract<A> &x,
const Fortran::evaluate::Subtract<A> &y) {
return isBinaryEqual(x, y);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Multiply<A> &x,
const Fortran::evaluate::Multiply<A> &y) {
return isBinaryEqual(x, y);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Divide<A> &x,
const Fortran::evaluate::Divide<A> &y) {
return isBinaryEqual(x, y);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Power<A> &x,
const Fortran::evaluate::Power<A> &y) {
return isBinaryEqual(x, y);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Extremum<A> &x,
const Fortran::evaluate::Extremum<A> &y) {
return isBinaryEqual(x, y);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::RealToIntPower<A> &x,
const Fortran::evaluate::RealToIntPower<A> &y) {
return isBinaryEqual(x, y);
}
template <int KIND>
static bool isEqual(const Fortran::evaluate::ComplexConstructor<KIND> &x,
const Fortran::evaluate::ComplexConstructor<KIND> &y) {
return isBinaryEqual(x, y);
}
template <int KIND>
static bool isEqual(const Fortran::evaluate::Concat<KIND> &x,
const Fortran::evaluate::Concat<KIND> &y) {
return isBinaryEqual(x, y);
}
template <int KIND>
static bool isEqual(const Fortran::evaluate::SetLength<KIND> &x,
const Fortran::evaluate::SetLength<KIND> &y) {
return isBinaryEqual(x, y);
}
static bool isEqual(const Fortran::semantics::SymbolRef &x,
const Fortran::semantics::SymbolRef &y) {
return isEqual(x.get(), y.get());
}
static bool isEqual(const Fortran::evaluate::Substring &x,
const Fortran::evaluate::Substring &y) {
return Fortran::common::visit(
[&](const auto &p, const auto &q) { return isEqual(p, q); },
x.parent(), y.parent()) &&
isEqual(x.lower(), y.lower()) && isEqual(x.upper(), y.upper());
}
static bool isEqual(const Fortran::evaluate::StaticDataObject::Pointer &x,
const Fortran::evaluate::StaticDataObject::Pointer &y) {
return x->name() == y->name();
}
static bool isEqual(const Fortran::evaluate::SpecificIntrinsic &x,
const Fortran::evaluate::SpecificIntrinsic &y) {
return x.name == y.name;
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Constant<A> &x,
const Fortran::evaluate::Constant<A> &y) {
return x == y;
}
static bool isEqual(const Fortran::evaluate::ActualArgument &x,
const Fortran::evaluate::ActualArgument &y) {
if (const Fortran::evaluate::Symbol *xs = x.GetAssumedTypeDummy()) {
if (const Fortran::evaluate::Symbol *ys = y.GetAssumedTypeDummy())
return isEqual(*xs, *ys);
return false;
}
return !y.GetAssumedTypeDummy() &&
isEqual(*x.UnwrapExpr(), *y.UnwrapExpr());
}
static bool isEqual(const Fortran::evaluate::ProcedureDesignator &x,
const Fortran::evaluate::ProcedureDesignator &y) {
return Fortran::common::visit(
[&](const auto &v, const auto &w) { return isEqual(v, w); }, x.u, y.u);
}
static bool isEqual(const Fortran::evaluate::ProcedureRef &x,
const Fortran::evaluate::ProcedureRef &y) {
return isEqual(x.proc(), y.proc()) && isEqual(x.arguments(), y.arguments());
}
template <typename A>
static bool isEqual(const Fortran::evaluate::ImpliedDo<A> &x,
const Fortran::evaluate::ImpliedDo<A> &y) {
return isEqual(x.values(), y.values()) && isEqual(x.lower(), y.lower()) &&
isEqual(x.upper(), y.upper()) && isEqual(x.stride(), y.stride());
}
template <typename A>
static bool isEqual(const Fortran::evaluate::ArrayConstructorValues<A> &x,
const Fortran::evaluate::ArrayConstructorValues<A> &y) {
using Expr = Fortran::evaluate::Expr<A>;
using ImpliedDo = Fortran::evaluate::ImpliedDo<A>;
for (const auto &[xValue, yValue] : llvm::zip(x, y)) {
bool checkElement = Fortran::common::visit(
common::visitors{
[&](const Expr &v, const Expr &w) { return isEqual(v, w); },
[&](const ImpliedDo &v, const ImpliedDo &w) {
return isEqual(v, w);
},
[&](const Expr &, const ImpliedDo &) { return false; },
[&](const ImpliedDo &, const Expr &) { return false; },
},
xValue.u, yValue.u);
if (!checkElement) {
return false;
}
}
return true;
}
static bool isEqual(const Fortran::evaluate::SubscriptInteger &x,
const Fortran::evaluate::SubscriptInteger &y) {
return x == y;
}
template <typename A>
static bool isEqual(const Fortran::evaluate::ArrayConstructor<A> &x,
const Fortran::evaluate::ArrayConstructor<A> &y) {
bool checkCharacterType = true;
if constexpr (A::category == Fortran::common::TypeCategory::Character) {
checkCharacterType = isEqual(*x.LEN(), *y.LEN());
}
using Base = Fortran::evaluate::ArrayConstructorValues<A>;
return isEqual((Base)x, (Base)y) &&
(x.GetType() == y.GetType() && checkCharacterType);
}
static bool isEqual(const Fortran::evaluate::ImpliedDoIndex &x,
const Fortran::evaluate::ImpliedDoIndex &y) {
return toStringRef(x.name) == toStringRef(y.name);
}
static bool isEqual(const Fortran::evaluate::TypeParamInquiry &x,
const Fortran::evaluate::TypeParamInquiry &y) {
return isEqual(x.base(), y.base()) && isEqual(x.parameter(), y.parameter());
}
static bool isEqual(const Fortran::evaluate::DescriptorInquiry &x,
const Fortran::evaluate::DescriptorInquiry &y) {
return isEqual(x.base(), y.base()) && x.field() == y.field() &&
x.dimension() == y.dimension();
}
static bool isEqual(const Fortran::evaluate::StructureConstructor &x,
const Fortran::evaluate::StructureConstructor &y) {
const auto &xValues = x.values();
const auto &yValues = y.values();
if (xValues.size() != yValues.size())
return false;
if (x.derivedTypeSpec() != y.derivedTypeSpec())
return false;
for (const auto &[xSymbol, xValue] : xValues) {
auto yIt = yValues.find(xSymbol);
// This should probably never happen, since the derived type
// should be the same.
if (yIt == yValues.end())
return false;
if (!isEqual(xValue, yIt->second))
return false;
}
return true;
}
template <int KIND>
static bool isEqual(const Fortran::evaluate::Not<KIND> &x,
const Fortran::evaluate::Not<KIND> &y) {
return isEqual(x.left(), y.left());
}
template <int KIND>
static bool isEqual(const Fortran::evaluate::LogicalOperation<KIND> &x,
const Fortran::evaluate::LogicalOperation<KIND> &y) {
return isEqual(x.left(), y.left()) && isEqual(x.right(), y.right());
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Relational<A> &x,
const Fortran::evaluate::Relational<A> &y) {
return isEqual(x.left(), y.left()) && isEqual(x.right(), y.right());
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Expr<A> &x,
const Fortran::evaluate::Expr<A> &y) {
return Fortran::common::visit(
[&](const auto &v, const auto &w) { return isEqual(v, w); }, x.u, y.u);
}
static bool
isEqual(const Fortran::evaluate::Relational<Fortran::evaluate::SomeType> &x,
const Fortran::evaluate::Relational<Fortran::evaluate::SomeType> &y) {
return Fortran::common::visit(
[&](const auto &v, const auto &w) { return isEqual(v, w); }, x.u, y.u);
}
template <typename A>
static bool isEqual(const Fortran::evaluate::Designator<A> &x,
const Fortran::evaluate::Designator<A> &y) {
return Fortran::common::visit(
[&](const auto &v, const auto &w) { return isEqual(v, w); }, x.u, y.u);
}
template <int BITS>
static bool isEqual(const Fortran::evaluate::value::Integer<BITS> &x,
const Fortran::evaluate::value::Integer<BITS> &y) {
return x == y;
}
static bool isEqual(const Fortran::evaluate::NullPointer &x,
const Fortran::evaluate::NullPointer &y) {
return true;
}
template <typename A, typename B,
std::enable_if_t<!std::is_same_v<A, B>, bool> = true>
static bool isEqual(const A &, const B &) {
return false;
}
};
unsigned getHashValue(const Fortran::lower::SomeExpr *x) {
return HashEvaluateExpr::getHashValue(*x);
}
unsigned getHashValue(const Fortran::lower::ExplicitIterSpace::ArrayBases &x) {
return Fortran::common::visit(
[&](const auto *p) { return HashEvaluateExpr::getHashValue(*p); }, x);
}
bool isEqual(const Fortran::lower::SomeExpr *x,
const Fortran::lower::SomeExpr *y) {
const auto *empty =
llvm::DenseMapInfo<const Fortran::lower::SomeExpr *>::getEmptyKey();
const auto *tombstone =
llvm::DenseMapInfo<const Fortran::lower::SomeExpr *>::getTombstoneKey();
if (x == empty || y == empty || x == tombstone || y == tombstone)
return x == y;
return x == y || IsEqualEvaluateExpr::isEqual(*x, *y);
}
bool isEqual(const Fortran::lower::ExplicitIterSpace::ArrayBases &x,
const Fortran::lower::ExplicitIterSpace::ArrayBases &y) {
return Fortran::common::visit(
Fortran::common::visitors{
// Fortran::semantics::Symbol * are the exception here. These pointers
// have identity; if two Symbol * values are the same (different) then
// they are the same (different) logical symbol.
[&](Fortran::lower::FrontEndSymbol p,
Fortran::lower::FrontEndSymbol q) { return p == q; },
[&](const auto *p, const auto *q) {
if constexpr (std::is_same_v<decltype(p), decltype(q)>) {
return IsEqualEvaluateExpr::isEqual(*p, *q);
} else {
// Different subtree types are never equal.
return false;
}
}},
x, y);
}
} // end namespace Fortran::lower
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