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//===-- Value.cpp -----------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file defines support functions for the `Value` type.
//
//===----------------------------------------------------------------------===//
#include "clang/Analysis/FlowSensitive/Value.h"
#include "clang/Analysis/FlowSensitive/DebugSupport.h"
#include "llvm/Support/Casting.h"
namespace clang {
namespace dataflow {
static bool areEquivalentIndirectionValues(const Value &Val1,
const Value &Val2) {
if (auto *IndVal1 = dyn_cast<ReferenceValue>(&Val1)) {
auto *IndVal2 = cast<ReferenceValue>(&Val2);
return &IndVal1->getReferentLoc() == &IndVal2->getReferentLoc();
}
if (auto *IndVal1 = dyn_cast<PointerValue>(&Val1)) {
auto *IndVal2 = cast<PointerValue>(&Val2);
return &IndVal1->getPointeeLoc() == &IndVal2->getPointeeLoc();
}
return false;
}
bool areEquivalentValues(const Value &Val1, const Value &Val2) {
return &Val1 == &Val2 || (Val1.getKind() == Val2.getKind() &&
(isa<TopBoolValue>(&Val1) ||
areEquivalentIndirectionValues(Val1, Val2)));
}
raw_ostream &operator<<(raw_ostream &OS, const Value &Val) {
switch (Val.getKind()) {
case Value::Kind::Reference: {
const auto *RV = cast<ReferenceValue>(&Val);
return OS << "Reference(" << &RV->getReferentLoc() << ")";
}
case Value::Kind::Pointer: {
const auto *PV = dyn_cast<PointerValue>(&Val);
return OS << "Pointer(" << &PV->getPointeeLoc() << ")";
}
// FIXME: support remaining cases.
default:
return OS << debugString(Val.getKind());
}
}
} // namespace dataflow
} // namespace clang
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